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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 | } |
126f1fc1 SM |
2397 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2398 | So since we just swapped the markers between the two buffers, we need | |
2399 | to undo the effect of this swap for window markers. */ | |
2400 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2401 | Lisp_Object buf1, buf2; | |
2402 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2403 | ||
2404 | while (NILP (Fmemq (w, ws))) | |
2405 | { | |
2406 | ws = Fcons (w, ws); | |
d3d50620 DA |
2407 | if (MARKERP (XWINDOW (w)->pointm) |
2408 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2409 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2410 | Fset_marker (XWINDOW (w)->pointm, | |
3a45383a | 2411 | make_number |
d3d50620 DA |
2412 | (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), |
2413 | XWINDOW (w)->buffer); | |
126f1fc1 SM |
2414 | w = Fnext_window (w, Qt, Qt); |
2415 | } | |
2416 | } | |
2417 | ||
13cda5f9 SM |
2418 | if (current_buffer->text->intervals) |
2419 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2420 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2421 | if (other_buffer->text->intervals) | |
2422 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2423 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2424 | ||
2425 | return Qnil; | |
2426 | } | |
2427 | ||
a7ca3326 | 2428 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2429 | 1, 1, 0, |
7ee72033 | 2430 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2431 | If FLAG is t, this makes the buffer a multibyte buffer. |
2432 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2433 | In these cases, the buffer contents remain unchanged as a sequence of |
2434 | bytes but the contents viewed as characters do change. | |
2435 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2436 | all eight-bit bytes to eight-bit characters. |
2437 | If the multibyte flag was really changed, undo information of the | |
2438 | current buffer is cleared. */) | |
5842a27b | 2439 | (Lisp_Object flag) |
3ac81adb | 2440 | { |
65745fad | 2441 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2442 | struct buffer *other; |
d311d28c | 2443 | ptrdiff_t begv, zv; |
37ef52bb PE |
2444 | bool narrowed = (BEG != BEGV || Z != ZV); |
2445 | bool modified_p = !NILP (Fbuffer_modified_p (Qnil)); | |
4b4deea2 | 2446 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2447 | struct gcpro gcpro1; |
3ac81adb | 2448 | |
6e553d5e RS |
2449 | if (current_buffer->base_buffer) |
2450 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2451 | ||
70e77119 | 2452 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2453 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2454 | return flag; |
2455 | ||
38babc07 KS |
2456 | GCPRO1 (old_undo); |
2457 | ||
2458 | /* Don't record these buffer changes. We will put a special undo entry | |
2459 | instead. */ | |
39eb03f1 | 2460 | bset_undo_list (current_buffer, Qt); |
b05525fa | 2461 | |
3ac81adb RS |
2462 | /* If the cached position is for this buffer, clear it out. */ |
2463 | clear_charpos_cache (current_buffer); | |
2464 | ||
458c8af4 KH |
2465 | if (NILP (flag)) |
2466 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2467 | else | |
2468 | begv = BEGV, zv = ZV; | |
2469 | ||
a9bcded1 | 2470 | if (narrowed) |
090cf9db | 2471 | error ("Changing multibyteness in a narrowed buffer"); |
a9bcded1 | 2472 | |
3ac81adb RS |
2473 | if (NILP (flag)) |
2474 | { | |
d311d28c | 2475 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2476 | unsigned char *p; |
2477 | ||
3ac81adb RS |
2478 | /* Do this first, so it can use CHAR_TO_BYTE |
2479 | to calculate the old correspondences. */ | |
2480 | set_intervals_multibyte (0); | |
2481 | ||
39eb03f1 | 2482 | bset_enable_multibyte_characters (current_buffer, Qnil); |
3ac81adb RS |
2483 | |
2484 | Z = Z_BYTE; | |
2485 | BEGV = BEGV_BYTE; | |
2486 | ZV = ZV_BYTE; | |
2487 | GPT = GPT_BYTE; | |
2488 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2489 | ||
60ebfdf3 | 2490 | |
65745fad SM |
2491 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2492 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2493 | |
2494 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2495 | pos = BEG; | |
2496 | stop = GPT; | |
2497 | p = BEG_ADDR; | |
2498 | while (1) | |
2499 | { | |
2500 | int c, bytes; | |
2501 | ||
2502 | if (pos == stop) | |
2503 | { | |
2504 | if (pos == Z) | |
2505 | break; | |
2506 | p = GAP_END_ADDR; | |
2507 | stop = Z; | |
2508 | } | |
8f348ed5 KH |
2509 | if (ASCII_BYTE_P (*p)) |
2510 | p++, pos++; | |
2511 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2512 | { |
62a6e103 | 2513 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2514 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2515 | last one, and change the last one to the character |
a9bcded1 KH |
2516 | code. */ |
2517 | bytes--; | |
2518 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2519 | p = GAP_END_ADDR; | |
2520 | *p++ = c; | |
2521 | pos++; | |
2522 | if (begv > pos) | |
2523 | begv -= bytes; | |
2524 | if (zv > pos) | |
2525 | zv -= bytes; | |
2526 | stop = Z; | |
2527 | } | |
8f924df7 | 2528 | else |
8f348ed5 KH |
2529 | { |
2530 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2531 | p += bytes, pos += bytes; | |
2532 | } | |
a9bcded1 KH |
2533 | } |
2534 | if (narrowed) | |
2535 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2536 | } |
2537 | else | |
2538 | { | |
d311d28c PE |
2539 | ptrdiff_t pt = PT; |
2540 | ptrdiff_t pos, stop; | |
8f348ed5 | 2541 | unsigned char *p, *pend; |
a9bcded1 | 2542 | |
673c57d2 | 2543 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2544 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2545 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2546 | |
8f924df7 | 2547 | if (EQ (flag, Qt) |
a3a303df | 2548 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2549 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2550 | { | |
8f54f30a | 2551 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2552 | |
8f54f30a PE |
2553 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2554 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2555 | { |
d311d28c | 2556 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2557 | |
2558 | move_gap_both (new_gpt, new_gpt); | |
2559 | } | |
2560 | } | |
2561 | ||
a9bcded1 KH |
2562 | /* Make the buffer contents valid as multibyte by converting |
2563 | 8-bit characters to multibyte form. */ | |
2564 | pos = BEG; | |
2565 | stop = GPT; | |
2566 | p = BEG_ADDR; | |
8f348ed5 | 2567 | pend = GPT_ADDR; |
a9bcded1 KH |
2568 | while (1) |
2569 | { | |
2570 | int bytes; | |
2571 | ||
2572 | if (pos == stop) | |
2573 | { | |
2574 | if (pos == Z) | |
2575 | break; | |
2576 | p = GAP_END_ADDR; | |
8f348ed5 | 2577 | pend = Z_ADDR; |
a9bcded1 KH |
2578 | stop = Z; |
2579 | } | |
177c0ea7 | 2580 | |
a3a303df KH |
2581 | if (ASCII_BYTE_P (*p)) |
2582 | p++, pos++; | |
dcfb9bc4 KH |
2583 | else if (EQ (flag, Qt) |
2584 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2585 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2586 | p += bytes, pos += bytes; |
2587 | else | |
2588 | { | |
2589 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2590 | int c; |
a9bcded1 | 2591 | |
8f924df7 | 2592 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2593 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2594 | *p = tmp[0]; |
2595 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2596 | bytes--; | |
b68864e5 | 2597 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2598 | /* Now the gap is after the just inserted data. */ |
2599 | pos = GPT; | |
2600 | p = GAP_END_ADDR; | |
2601 | if (pos <= begv) | |
2602 | begv += bytes; | |
2603 | if (pos <= zv) | |
2604 | zv += bytes; | |
2605 | if (pos <= pt) | |
2606 | pt += bytes; | |
31285a8f | 2607 | pend = Z_ADDR; |
a9bcded1 KH |
2608 | stop = Z; |
2609 | } | |
2610 | } | |
2611 | ||
2612 | if (pt != PT) | |
2613 | TEMP_SET_PT (pt); | |
2614 | ||
2615 | if (narrowed) | |
2616 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2617 | ||
3ac81adb RS |
2618 | /* Do this first, so that chars_in_text asks the right question. |
2619 | set_intervals_multibyte needs it too. */ | |
39eb03f1 | 2620 | bset_enable_multibyte_characters (current_buffer, Qt); |
3ac81adb | 2621 | |
b05525fa | 2622 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2623 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2624 | |
673c57d2 | 2625 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2626 | |
2627 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2628 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2629 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2630 | else |
2631 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2632 | |
2633 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2634 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2635 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2636 | else |
2637 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2638 | |
2639 | { | |
d311d28c PE |
2640 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2641 | ptrdiff_t position; | |
b05525fa | 2642 | |
8f54f30a PE |
2643 | if (byte > GPT_BYTE) |
2644 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2645 | else |
8f54f30a PE |
2646 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2647 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2648 | } |
3ac81adb RS |
2649 | |
2650 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2651 | |
2652 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2653 | getting confused by the markers that have not yet been updated. | |
2654 | It is also a signal that it should never create a marker. */ | |
65745fad | 2655 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2656 | |
65745fad | 2657 | for (; tail; tail = tail->next) |
3ac81adb | 2658 | { |
65745fad SM |
2659 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2660 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2661 | } |
b69f9797 RS |
2662 | |
2663 | /* Make sure no markers were put on the chain | |
2664 | while the chain value was incorrect. */ | |
65745fad | 2665 | if (BUF_MARKERS (current_buffer)) |
1088b922 | 2666 | emacs_abort (); |
b69f9797 | 2667 | |
3ac81adb RS |
2668 | BUF_MARKERS (current_buffer) = markers; |
2669 | ||
2670 | /* Do this last, so it can calculate the new correspondences | |
2671 | between chars and bytes. */ | |
2672 | set_intervals_multibyte (1); | |
2673 | } | |
2674 | ||
38babc07 KS |
2675 | if (!EQ (old_undo, Qt)) |
2676 | { | |
2677 | /* Represent all the above changes by a special undo entry. */ | |
39eb03f1 PE |
2678 | bset_undo_list (current_buffer, |
2679 | Fcons (list3 (Qapply, | |
2680 | intern ("set-buffer-multibyte"), | |
2681 | NILP (flag) ? Qt : Qnil), | |
2682 | old_undo)); | |
38babc07 KS |
2683 | } |
2684 | ||
2685 | UNGCPRO; | |
a9bcded1 | 2686 | |
724b203f | 2687 | current_buffer->prevent_redisplay_optimizations_p = 1; |
c6afe371 DA |
2688 | |
2689 | /* If buffer is shown in a window, let redisplay consider other windows. */ | |
2690 | if (buffer_window_count (current_buffer)) | |
2691 | ++windows_or_buffers_changed; | |
724b203f | 2692 | |
abc9d959 RS |
2693 | /* Copy this buffer's new multibyte status |
2694 | into all of its indirect buffers. */ | |
52b852c7 | 2695 | FOR_EACH_BUFFER (other) |
e578f381 | 2696 | if (other->base_buffer == current_buffer && BUFFER_LIVE_P (other)) |
724b203f | 2697 | { |
4b4deea2 TT |
2698 | BVAR (other, enable_multibyte_characters) |
2699 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2700 | other->prevent_redisplay_optimizations_p = 1; |
2701 | } | |
abc9d959 | 2702 | |
ed00559d KH |
2703 | /* Restore the modifiedness of the buffer. */ |
2704 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2705 | Fset_buffer_modified_p (Qnil); | |
2706 | ||
172f9454 KH |
2707 | /* Update coding systems of this buffer's process (if any). */ |
2708 | { | |
2709 | Lisp_Object process; | |
2710 | ||
2711 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2712 | if (PROCESSP (process)) | |
2713 | setup_process_coding_systems (process); | |
2714 | } | |
2715 | ||
3ac81adb RS |
2716 | return flag; |
2717 | } | |
2718 | \f | |
a7ca3326 | 2719 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2720 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2721 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2722 | Most local variable bindings are eliminated so that the default values |
2723 | become effective once more. Also, the syntax table is set from | |
2724 | `standard-syntax-table', the local keymap is set to nil, | |
2725 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2726 | This function also forces redisplay of the mode line. | |
2727 | ||
2728 | Every function to select a new major mode starts by | |
2729 | calling this function. | |
2730 | ||
2731 | As a special exception, local variables whose names have | |
2732 | a non-nil `permanent-local' property are not eliminated by this function. | |
2733 | ||
2734 | The first thing this function does is run | |
7ee72033 | 2735 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2736 | (void) |
1ab256cb | 2737 | { |
dee091a3 | 2738 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2739 | |
3709505e | 2740 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2741 | remain swapped in, in their symbols. */ |
1ab256cb | 2742 | |
2f3f993b | 2743 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2744 | |
2745 | /* Actually eliminate all local bindings of this buffer. */ | |
2746 | ||
13de9290 | 2747 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2748 | |
1ab256cb RM |
2749 | /* Force mode-line redisplay. Useful here because all major mode |
2750 | commands call this function. */ | |
2751 | update_mode_lines++; | |
2752 | ||
2753 | return Qnil; | |
2754 | } | |
2f3f993b RS |
2755 | |
2756 | /* Make sure no local variables remain set up with buffer B | |
2757 | for their current values. */ | |
2758 | ||
2759 | static void | |
d3da34e0 | 2760 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2761 | { |
ce5b453a | 2762 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2763 | |
2764 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2765 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2766 | |
67ee9f6e | 2767 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2768 | { |
ce5b453a SM |
2769 | Lisp_Object sym = XCAR (XCAR (alist)); |
2770 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2771 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2772 | now cached. */ |
ce5b453a | 2773 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2774 | { |
e7c10f83 SM |
2775 | /* Symbol is set up for this buffer's old local value: |
2776 | swap it out! */ | |
ce5b453a | 2777 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2778 | } |
2779 | } | |
2780 | } | |
1ab256cb | 2781 | \f |
2eec3b4e | 2782 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2783 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2784 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2785 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2786 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2787 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2788 | or where an overlay starts which ends at or after POS; |
624d2678 | 2789 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2790 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2791 | |
2792 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2793 | when this function is called. |
2794 | ||
37ef52bb PE |
2795 | If EXTEND, make the vector bigger if necessary. |
2796 | If not, never extend the vector, | |
2797 | and store only as many overlays as will fit. | |
2798 | But still return the total number of overlays. | |
ac869cf7 | 2799 | |
37ef52bb | 2800 | If CHANGE_REQ, any position written into *PREV_PTR or |
ac869cf7 MB |
2801 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the |
2802 | default (BEGV or ZV). */ | |
2eec3b4e | 2803 | |
b081724f | 2804 | ptrdiff_t |
37ef52bb | 2805 | overlays_at (EMACS_INT pos, bool extend, Lisp_Object **vec_ptr, |
b081724f | 2806 | ptrdiff_t *len_ptr, |
37ef52bb | 2807 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, bool change_req) |
1ab256cb | 2808 | { |
2410d73a SM |
2809 | Lisp_Object overlay, start, end; |
2810 | struct Lisp_Overlay *tail; | |
b081724f PE |
2811 | ptrdiff_t idx = 0; |
2812 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2813 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2814 | ptrdiff_t next = ZV; |
2815 | ptrdiff_t prev = BEGV; | |
37ef52bb | 2816 | bool inhibit_storing = 0; |
61d54cd5 | 2817 | |
fd318b54 | 2818 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2819 | { |
d311d28c | 2820 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2821 | |
2410d73a | 2822 | XSETMISC (overlay, tail); |
1ab256cb | 2823 | |
2eec3b4e RS |
2824 | start = OVERLAY_START (overlay); |
2825 | end = OVERLAY_END (overlay); | |
239c932b RS |
2826 | endpos = OVERLAY_POSITION (end); |
2827 | if (endpos < pos) | |
2828 | { | |
2829 | if (prev < endpos) | |
2830 | prev = endpos; | |
2831 | break; | |
2832 | } | |
413e06a4 RS |
2833 | startpos = OVERLAY_POSITION (start); |
2834 | /* This one ends at or after POS | |
daa1c109 | 2835 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2836 | if (prev < startpos && startpos < pos) |
2837 | prev = startpos; | |
239c932b RS |
2838 | if (endpos == pos) |
2839 | continue; | |
2eec3b4e RS |
2840 | if (startpos <= pos) |
2841 | { | |
2842 | if (idx == len) | |
2843 | { | |
61d54cd5 RS |
2844 | /* The supplied vector is full. |
2845 | Either make it bigger, or don't store any more in it. */ | |
2846 | if (extend) | |
2847 | { | |
0065d054 PE |
2848 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2849 | sizeof *vec); | |
61d54cd5 | 2850 | *vec_ptr = vec; |
0065d054 | 2851 | len = *len_ptr; |
61d54cd5 RS |
2852 | } |
2853 | else | |
2854 | inhibit_storing = 1; | |
2eec3b4e | 2855 | } |
61d54cd5 RS |
2856 | |
2857 | if (!inhibit_storing) | |
2858 | vec[idx] = overlay; | |
2859 | /* Keep counting overlays even if we can't return them all. */ | |
2860 | idx++; | |
2eec3b4e RS |
2861 | } |
2862 | else if (startpos < next) | |
2863 | next = startpos; | |
2864 | } | |
2865 | ||
fd318b54 | 2866 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2867 | { |
d311d28c | 2868 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2869 | |
2410d73a | 2870 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2871 | |
2872 | start = OVERLAY_START (overlay); | |
2873 | end = OVERLAY_END (overlay); | |
2874 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2875 | if (pos < startpos) |
2eec3b4e RS |
2876 | { |
2877 | if (startpos < next) | |
2878 | next = startpos; | |
2879 | break; | |
2880 | } | |
239c932b RS |
2881 | endpos = OVERLAY_POSITION (end); |
2882 | if (pos < endpos) | |
2eec3b4e RS |
2883 | { |
2884 | if (idx == len) | |
2885 | { | |
61d54cd5 RS |
2886 | if (extend) |
2887 | { | |
0065d054 PE |
2888 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2889 | sizeof *vec); | |
61d54cd5 | 2890 | *vec_ptr = vec; |
0065d054 | 2891 | len = *len_ptr; |
61d54cd5 RS |
2892 | } |
2893 | else | |
2894 | inhibit_storing = 1; | |
2eec3b4e | 2895 | } |
61d54cd5 RS |
2896 | |
2897 | if (!inhibit_storing) | |
2898 | vec[idx] = overlay; | |
2899 | idx++; | |
413e06a4 RS |
2900 | |
2901 | if (startpos < pos && startpos > prev) | |
2902 | prev = startpos; | |
2eec3b4e | 2903 | } |
239c932b RS |
2904 | else if (endpos < pos && endpos > prev) |
2905 | prev = endpos; | |
1d5f4c1d MB |
2906 | else if (endpos == pos && startpos > prev |
2907 | && (!change_req || startpos < pos)) | |
413e06a4 | 2908 | prev = startpos; |
1ab256cb RM |
2909 | } |
2910 | ||
239c932b RS |
2911 | if (next_ptr) |
2912 | *next_ptr = next; | |
2913 | if (prev_ptr) | |
2914 | *prev_ptr = prev; | |
2eec3b4e RS |
2915 | return idx; |
2916 | } | |
74514898 | 2917 | \f |
7723e095 MR |
2918 | /* Find all the overlays in the current buffer that overlap the range |
2919 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2920 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2921 | |
177c0ea7 | 2922 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2923 | Store in *LEN_PTR the size allocated for the vector. |
2924 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2925 | or ZV if there are no more overlays. | |
2926 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2927 | or BEGV if there are no previous overlays. | |
2928 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2929 | ||
2930 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2931 | when this function is called. | |
2932 | ||
37ef52bb PE |
2933 | If EXTEND, make the vector bigger if necessary. |
2934 | If not, never extend the vector, | |
2935 | and store only as many overlays as will fit. | |
2936 | But still return the total number of overlays. */ | |
74514898 | 2937 | |
21514da7 | 2938 | static ptrdiff_t |
37ef52bb | 2939 | overlays_in (EMACS_INT beg, EMACS_INT end, bool extend, |
21514da7 | 2940 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2941 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2942 | { |
2410d73a SM |
2943 | Lisp_Object overlay, ostart, oend; |
2944 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2945 | ptrdiff_t idx = 0; |
2946 | ptrdiff_t len = *len_ptr; | |
74514898 | 2947 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2948 | ptrdiff_t next = ZV; |
2949 | ptrdiff_t prev = BEGV; | |
37ef52bb PE |
2950 | bool inhibit_storing = 0; |
2951 | bool end_is_Z = end == Z; | |
74514898 | 2952 | |
fd318b54 | 2953 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2954 | { |
d311d28c | 2955 | ptrdiff_t startpos, endpos; |
74514898 | 2956 | |
2410d73a | 2957 | XSETMISC (overlay, tail); |
74514898 RS |
2958 | |
2959 | ostart = OVERLAY_START (overlay); | |
2960 | oend = OVERLAY_END (overlay); | |
2961 | endpos = OVERLAY_POSITION (oend); | |
2962 | if (endpos < beg) | |
2963 | { | |
2964 | if (prev < endpos) | |
2965 | prev = endpos; | |
2966 | break; | |
2967 | } | |
2968 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2969 | /* Count an interval if it overlaps the range, is empty at the |
2970 | start of the range, or is empty at END provided END denotes the | |
2971 | end of the buffer. */ | |
74514898 | 2972 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2973 | || (startpos == endpos |
2974 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2975 | { |
2976 | if (idx == len) | |
2977 | { | |
2978 | /* The supplied vector is full. | |
2979 | Either make it bigger, or don't store any more in it. */ | |
2980 | if (extend) | |
2981 | { | |
0065d054 PE |
2982 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2983 | sizeof *vec); | |
74514898 | 2984 | *vec_ptr = vec; |
0065d054 | 2985 | len = *len_ptr; |
74514898 RS |
2986 | } |
2987 | else | |
2988 | inhibit_storing = 1; | |
2989 | } | |
2990 | ||
2991 | if (!inhibit_storing) | |
2992 | vec[idx] = overlay; | |
2993 | /* Keep counting overlays even if we can't return them all. */ | |
2994 | idx++; | |
2995 | } | |
2996 | else if (startpos < next) | |
2997 | next = startpos; | |
2998 | } | |
2999 | ||
fd318b54 | 3000 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 3001 | { |
d311d28c | 3002 | ptrdiff_t startpos, endpos; |
74514898 | 3003 | |
2410d73a | 3004 | XSETMISC (overlay, tail); |
74514898 RS |
3005 | |
3006 | ostart = OVERLAY_START (overlay); | |
3007 | oend = OVERLAY_END (overlay); | |
3008 | startpos = OVERLAY_POSITION (ostart); | |
3009 | if (end < startpos) | |
3010 | { | |
3011 | if (startpos < next) | |
3012 | next = startpos; | |
3013 | break; | |
3014 | } | |
3015 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
3016 | /* Count an interval if it overlaps the range, is empty at the |
3017 | start of the range, or is empty at END provided END denotes the | |
3018 | end of the buffer. */ | |
74514898 | 3019 | if ((beg < endpos && startpos < end) |
7723e095 MR |
3020 | || (startpos == endpos |
3021 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
3022 | { |
3023 | if (idx == len) | |
3024 | { | |
3025 | if (extend) | |
3026 | { | |
0065d054 PE |
3027 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3028 | sizeof *vec); | |
74514898 | 3029 | *vec_ptr = vec; |
0065d054 | 3030 | len = *len_ptr; |
74514898 RS |
3031 | } |
3032 | else | |
3033 | inhibit_storing = 1; | |
3034 | } | |
3035 | ||
3036 | if (!inhibit_storing) | |
3037 | vec[idx] = overlay; | |
3038 | idx++; | |
3039 | } | |
3040 | else if (endpos < beg && endpos > prev) | |
3041 | prev = endpos; | |
3042 | } | |
fc04fa47 | 3043 | |
74514898 RS |
3044 | if (next_ptr) |
3045 | *next_ptr = next; | |
3046 | if (prev_ptr) | |
3047 | *prev_ptr = prev; | |
3048 | return idx; | |
3049 | } | |
09a22085 GM |
3050 | |
3051 | ||
37ef52bb | 3052 | /* Return true if there exists an overlay with a non-nil |
09a22085 GM |
3053 | `mouse-face' property overlapping OVERLAY. */ |
3054 | ||
37ef52bb | 3055 | bool |
d3da34e0 | 3056 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 3057 | { |
d311d28c PE |
3058 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3059 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 3060 | ptrdiff_t n, i, size; |
09a22085 | 3061 | Lisp_Object *v, tem; |
177c0ea7 | 3062 | |
bfd8410f | 3063 | size = 10; |
38182d90 | 3064 | v = alloca (size * sizeof *v); |
bfd8410f GM |
3065 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
3066 | if (n > size) | |
09a22085 | 3067 | { |
38182d90 | 3068 | v = alloca (n * sizeof *v); |
09a22085 GM |
3069 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
3070 | } | |
3071 | ||
3072 | for (i = 0; i < n; ++i) | |
3073 | if (!EQ (v[i], overlay) | |
3074 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3075 | !NILP (tem))) | |
3076 | break; | |
3077 | ||
3078 | return i < n; | |
3079 | } | |
3080 | ||
3081 | ||
74514898 | 3082 | \f |
fc04fa47 | 3083 | /* Fast function to just test if we're at an overlay boundary. */ |
37ef52bb | 3084 | bool |
d311d28c | 3085 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 3086 | { |
2410d73a SM |
3087 | Lisp_Object overlay; |
3088 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3089 | |
fd318b54 | 3090 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 3091 | { |
d311d28c | 3092 | ptrdiff_t endpos; |
fc04fa47 | 3093 | |
2410d73a | 3094 | XSETMISC (overlay ,tail); |
22657b40 | 3095 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3096 | |
3097 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3098 | if (endpos < pos) | |
3099 | break; | |
3100 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3101 | return 1; | |
3102 | } | |
3103 | ||
fd318b54 | 3104 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 3105 | { |
d311d28c | 3106 | ptrdiff_t startpos; |
fc04fa47 | 3107 | |
2410d73a | 3108 | XSETMISC (overlay, tail); |
22657b40 | 3109 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3110 | |
3111 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3112 | if (pos < startpos) | |
3113 | break; | |
3114 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3115 | return 1; | |
3116 | } | |
3117 | return 0; | |
3118 | } | |
2eec3b4e | 3119 | \f |
5985d248 KH |
3120 | struct sortvec |
3121 | { | |
3122 | Lisp_Object overlay; | |
d311d28c | 3123 | ptrdiff_t beg, end; |
fadf4e30 | 3124 | EMACS_INT priority; |
5985d248 KH |
3125 | }; |
3126 | ||
3127 | static int | |
d3da34e0 | 3128 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3129 | { |
dfcf069d AS |
3130 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3131 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 3132 | if (s1->priority != s2->priority) |
c20998a7 | 3133 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 3134 | if (s1->beg != s2->beg) |
c20998a7 | 3135 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 3136 | if (s1->end != s2->end) |
c20998a7 | 3137 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
3138 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
3139 | between "equal" overlays. The result can still change between | |
3140 | invocations of Emacs, but it won't change in the middle of | |
3141 | `find_field' (bug#6830). */ | |
61ddb1b9 SM |
3142 | if (!EQ (s1->overlay, s2->overlay)) |
3143 | return XLI (s1->overlay) < XLI (s2->overlay) ? -1 : 1; | |
5985d248 KH |
3144 | return 0; |
3145 | } | |
3146 | ||
3147 | /* Sort an array of overlays by priority. The array is modified in place. | |
3148 | The return value is the new size; this may be smaller than the original | |
3149 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
3150 | ptrdiff_t |
3151 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 3152 | { |
b081724f | 3153 | ptrdiff_t i, j; |
59ac2d13 EZ |
3154 | USE_SAFE_ALLOCA; |
3155 | struct sortvec *sortvec; | |
3156 | ||
3157 | SAFE_NALLOCA (sortvec, 1, noverlays); | |
5985d248 KH |
3158 | |
3159 | /* Put the valid and relevant overlays into sortvec. */ | |
3160 | ||
3161 | for (i = 0, j = 0; i < noverlays; i++) | |
3162 | { | |
0fa767e7 | 3163 | Lisp_Object tem; |
c99fc30f | 3164 | Lisp_Object overlay; |
5985d248 | 3165 | |
c99fc30f | 3166 | overlay = overlay_vec[i]; |
22657b40 | 3167 | if (OVERLAYP (overlay) |
5985d248 KH |
3168 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
3169 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3170 | { | |
0fa767e7 KH |
3171 | /* If we're interested in a specific window, then ignore |
3172 | overlays that are limited to some other window. */ | |
3173 | if (w) | |
5985d248 | 3174 | { |
28545e04 | 3175 | Lisp_Object window; |
0fa767e7 KH |
3176 | |
3177 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3178 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3179 | continue; |
5985d248 | 3180 | } |
0fa767e7 KH |
3181 | |
3182 | /* This overlay is good and counts: put it into sortvec. */ | |
3183 | sortvec[j].overlay = overlay; | |
3184 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3185 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3186 | tem = Foverlay_get (overlay, Qpriority); | |
3187 | if (INTEGERP (tem)) | |
3188 | sortvec[j].priority = XINT (tem); | |
3189 | else | |
3190 | sortvec[j].priority = 0; | |
3191 | j++; | |
5985d248 KH |
3192 | } |
3193 | } | |
3194 | noverlays = j; | |
3195 | ||
3196 | /* Sort the overlays into the proper order: increasing priority. */ | |
3197 | ||
3198 | if (noverlays > 1) | |
3199 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3200 | ||
3201 | for (i = 0; i < noverlays; i++) | |
3202 | overlay_vec[i] = sortvec[i].overlay; | |
59ac2d13 EZ |
3203 | |
3204 | SAFE_FREE (); | |
5985d248 KH |
3205 | return (noverlays); |
3206 | } | |
3207 | \f | |
bbbe9545 KH |
3208 | struct sortstr |
3209 | { | |
cb26008f | 3210 | Lisp_Object string, string2; |
93cb6be3 | 3211 | ptrdiff_t size; |
8961a454 | 3212 | EMACS_INT priority; |
bbbe9545 KH |
3213 | }; |
3214 | ||
e8185fa8 KH |
3215 | struct sortstrlist |
3216 | { | |
3217 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3218 | ptrdiff_t size; /* Allocated length of that array. */ |
3219 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3220 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3221 | }; |
3222 | ||
3223 | /* Buffers for storing information about the overlays touching a given | |
3224 | position. These could be automatic variables in overlay_strings, but | |
3225 | it's more efficient to hold onto the memory instead of repeatedly | |
3226 | allocating and freeing it. */ | |
3227 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3228 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3229 | |
3230 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3231 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3232 | |
bbbe9545 KH |
3233 | /* A comparison function suitable for passing to qsort. */ |
3234 | static int | |
d3da34e0 | 3235 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3236 | { |
3237 | struct sortstr *s1 = (struct sortstr *)as1; | |
3238 | struct sortstr *s2 = (struct sortstr *)as2; | |
3239 | if (s1->size != s2->size) | |
c20998a7 | 3240 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3241 | if (s1->priority != s2->priority) |
c20998a7 | 3242 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3243 | return 0; |
3244 | } | |
3245 | ||
e8185fa8 | 3246 | static void |
93cb6be3 PE |
3247 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3248 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3249 | { |
d311d28c | 3250 | ptrdiff_t nbytes; |
43d27a72 | 3251 | |
e8185fa8 | 3252 | if (ssl->used == ssl->size) |
0065d054 | 3253 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3254 | ssl->buf[ssl->used].string = str; |
cb26008f | 3255 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3256 | ssl->buf[ssl->used].size = size; |
3257 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3258 | ssl->used++; | |
43d27a72 | 3259 | |
4b4deea2 | 3260 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3261 | nbytes = SCHARS (str); |
43d27a72 | 3262 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3263 | nbytes = count_size_as_multibyte (SDATA (str), |
3264 | SBYTES (str)); | |
43d27a72 | 3265 | else |
d5db4077 | 3266 | nbytes = SBYTES (str); |
43d27a72 | 3267 | |
0065d054 PE |
3268 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3269 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3270 | ssl->bytes += nbytes; |
3271 | ||
cb26008f | 3272 | if (STRINGP (str2)) |
43d27a72 | 3273 | { |
4b4deea2 | 3274 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3275 | nbytes = SCHARS (str2); |
43d27a72 | 3276 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3277 | nbytes = count_size_as_multibyte (SDATA (str2), |
3278 | SBYTES (str2)); | |
43d27a72 | 3279 | else |
d5db4077 | 3280 | nbytes = SBYTES (str2); |
43d27a72 | 3281 | |
0065d054 PE |
3282 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3283 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3284 | ssl->bytes += nbytes; |
3285 | } | |
e8185fa8 | 3286 | } |
bbbe9545 KH |
3287 | |
3288 | /* Return the concatenation of the strings associated with overlays that | |
3289 | begin or end at POS, ignoring overlays that are specific to a window | |
3290 | other than W. The strings are concatenated in the appropriate order: | |
3291 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3292 | lower. Normally all of the after-strings come first, but zero-sized |
3293 | overlays have their after-strings ride along with the before-strings | |
3294 | because it would look strange to print them inside-out. | |
3295 | ||
3296 | Returns the string length, and stores the contents indirectly through | |
3297 | PSTR, if that variable is non-null. The string may be overwritten by | |
3298 | subsequent calls. */ | |
6b5d3b89 | 3299 | |
d311d28c PE |
3300 | ptrdiff_t |
3301 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3302 | { |
28545e04 | 3303 | Lisp_Object overlay, window, str; |
2410d73a | 3304 | struct Lisp_Overlay *ov; |
d311d28c | 3305 | ptrdiff_t startpos, endpos; |
37ef52bb | 3306 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3307 | |
e8185fa8 KH |
3308 | overlay_heads.used = overlay_heads.bytes = 0; |
3309 | overlay_tails.used = overlay_tails.bytes = 0; | |
fd318b54 | 3310 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3311 | { |
2410d73a | 3312 | XSETMISC (overlay, ov); |
c2d5b10f | 3313 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3314 | |
3315 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3316 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3317 | if (endpos < pos) | |
3318 | break; | |
3319 | if (endpos != pos && startpos != pos) | |
3320 | continue; | |
3321 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3322 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3323 | continue; |
e8185fa8 KH |
3324 | if (startpos == pos |
3325 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3326 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3327 | (startpos == endpos |
3328 | ? Foverlay_get (overlay, Qafter_string) | |
3329 | : Qnil), | |
3330 | Foverlay_get (overlay, Qpriority), | |
3331 | endpos - startpos); | |
3332 | else if (endpos == pos | |
3333 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3334 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3335 | Foverlay_get (overlay, Qpriority), |
3336 | endpos - startpos); | |
bbbe9545 | 3337 | } |
fd318b54 | 3338 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3339 | { |
2410d73a SM |
3340 | XSETMISC (overlay, ov); |
3341 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3342 | |
3343 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3344 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3345 | if (startpos > pos) | |
3346 | break; | |
e8185fa8 KH |
3347 | if (endpos != pos && startpos != pos) |
3348 | continue; | |
3349 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3350 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3351 | continue; |
e8185fa8 KH |
3352 | if (startpos == pos |
3353 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3354 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3355 | (startpos == endpos |
3356 | ? Foverlay_get (overlay, Qafter_string) | |
3357 | : Qnil), | |
3358 | Foverlay_get (overlay, Qpriority), | |
3359 | endpos - startpos); | |
3360 | else if (endpos == pos | |
3361 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3362 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3363 | Foverlay_get (overlay, Qpriority), |
3364 | endpos - startpos); | |
bbbe9545 | 3365 | } |
e8185fa8 KH |
3366 | if (overlay_tails.used > 1) |
3367 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3368 | cmp_for_strings); | |
3369 | if (overlay_heads.used > 1) | |
3370 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3371 | cmp_for_strings); | |
3372 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3373 | { |
e8185fa8 | 3374 | Lisp_Object tem; |
d311d28c | 3375 | ptrdiff_t i; |
9f4d7cde | 3376 | unsigned char *p; |
0065d054 | 3377 | ptrdiff_t total; |
bbbe9545 | 3378 | |
0065d054 PE |
3379 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3380 | memory_full (SIZE_MAX); | |
3381 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3382 | if (total > overlay_str_len) |
0065d054 PE |
3383 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3384 | total - overlay_str_len, -1, 1); | |
3385 | ||
bbbe9545 | 3386 | p = overlay_str_buf; |
e8185fa8 | 3387 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3388 | { |
d311d28c | 3389 | ptrdiff_t nbytes; |
e8185fa8 | 3390 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3391 | nbytes = copy_text (SDATA (tem), p, |
3392 | SBYTES (tem), | |
43d27a72 RS |
3393 | STRING_MULTIBYTE (tem), multibyte); |
3394 | p += nbytes; | |
bbbe9545 | 3395 | } |
e8185fa8 | 3396 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3397 | { |
d311d28c | 3398 | ptrdiff_t nbytes; |
e8185fa8 | 3399 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3400 | nbytes = copy_text (SDATA (tem), p, |
3401 | SBYTES (tem), | |
43d27a72 RS |
3402 | STRING_MULTIBYTE (tem), multibyte); |
3403 | p += nbytes; | |
cb26008f KH |
3404 | tem = overlay_heads.buf[i].string2; |
3405 | if (STRINGP (tem)) | |
3406 | { | |
d5db4077 KR |
3407 | nbytes = copy_text (SDATA (tem), p, |
3408 | SBYTES (tem), | |
43d27a72 RS |
3409 | STRING_MULTIBYTE (tem), multibyte); |
3410 | p += nbytes; | |
cb26008f | 3411 | } |
bbbe9545 | 3412 | } |
cb26008f | 3413 | if (p != overlay_str_buf + total) |
1088b922 | 3414 | emacs_abort (); |
bbbe9545 KH |
3415 | if (pstr) |
3416 | *pstr = overlay_str_buf; | |
e8185fa8 | 3417 | return total; |
bbbe9545 | 3418 | } |
e8185fa8 | 3419 | return 0; |
bbbe9545 KH |
3420 | } |
3421 | \f | |
5c4f68f1 | 3422 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3423 | |
2eec3b4e | 3424 | void |
d311d28c | 3425 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3426 | { |
2410d73a SM |
3427 | Lisp_Object overlay, beg, end; |
3428 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3429 | |
3430 | /* See if anything in overlays_before should move to overlays_after. */ | |
3431 | ||
3432 | /* We don't strictly need prev in this loop; it should always be nil. | |
3433 | But we use it for symmetry and in case that should cease to be true | |
3434 | with some future change. */ | |
2410d73a | 3435 | prev = NULL; |
fd318b54 | 3436 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) |
1ab256cb | 3437 | { |
2410d73a SM |
3438 | next = tail->next; |
3439 | XSETMISC (overlay, tail); | |
22657b40 | 3440 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3441 | |
2eec3b4e RS |
3442 | beg = OVERLAY_START (overlay); |
3443 | end = OVERLAY_END (overlay); | |
1ab256cb | 3444 | |
2eec3b4e | 3445 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3446 | { |
2eec3b4e | 3447 | /* OVERLAY needs to be moved. */ |
d311d28c | 3448 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3449 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3450 | |
3451 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3452 | if (prev) |
3453 | prev->next = next; | |
2eec3b4e | 3454 | else |
0c94c8d6 | 3455 | set_buffer_overlays_before (buf, next); |
2eec3b4e RS |
3456 | |
3457 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3458 | other_prev = NULL; |
fd318b54 | 3459 | for (other = buf->overlays_after; other; |
2410d73a | 3460 | other_prev = other, other = other->next) |
1ab256cb | 3461 | { |
6af718a4 | 3462 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3463 | |
2410d73a | 3464 | XSETMISC (otheroverlay, other); |
22657b40 | 3465 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3466 | |
3467 | otherbeg = OVERLAY_START (otheroverlay); | |
3468 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3469 | break; | |
1ab256cb | 3470 | } |
2eec3b4e RS |
3471 | |
3472 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3473 | tail->next = other; |
3474 | if (other_prev) | |
3475 | other_prev->next = tail; | |
1ab256cb | 3476 | else |
0c94c8d6 | 3477 | set_buffer_overlays_after (buf, tail); |
2eec3b4e | 3478 | tail = prev; |
1ab256cb | 3479 | } |
2eec3b4e RS |
3480 | else |
3481 | /* We've reached the things that should stay in overlays_before. | |
3482 | All the rest of overlays_before must end even earlier, | |
3483 | so stop now. */ | |
3484 | break; | |
3485 | } | |
3486 | ||
3487 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3488 | prev = NULL; |
fd318b54 | 3489 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) |
2eec3b4e | 3490 | { |
2410d73a SM |
3491 | next = tail->next; |
3492 | XSETMISC (overlay, tail); | |
22657b40 | 3493 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3494 | |
3495 | beg = OVERLAY_START (overlay); | |
3496 | end = OVERLAY_END (overlay); | |
3497 | ||
3498 | /* Stop looking, when we know that nothing further | |
3499 | can possibly end before POS. */ | |
3500 | if (OVERLAY_POSITION (beg) > pos) | |
3501 | break; | |
3502 | ||
3503 | if (OVERLAY_POSITION (end) <= pos) | |
3504 | { | |
3505 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3506 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3507 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3508 | |
3509 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3510 | if (prev) |
3511 | prev->next = next; | |
2eec3b4e | 3512 | else |
0c94c8d6 | 3513 | set_buffer_overlays_after (buf, next); |
2eec3b4e RS |
3514 | |
3515 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3516 | other_prev = NULL; |
fd318b54 | 3517 | for (other = buf->overlays_before; other; |
2410d73a | 3518 | other_prev = other, other = other->next) |
2eec3b4e RS |
3519 | { |
3520 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3521 | |
2410d73a | 3522 | XSETMISC (otheroverlay, other); |
22657b40 | 3523 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3524 | |
3525 | otherend = OVERLAY_END (otheroverlay); | |
3526 | if (OVERLAY_POSITION (otherend) <= where) | |
3527 | break; | |
3528 | } | |
3529 | ||
3530 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3531 | tail->next = other; |
3532 | if (other_prev) | |
3533 | other_prev->next = tail; | |
2eec3b4e | 3534 | else |
0c94c8d6 | 3535 | set_buffer_overlays_before (buf, tail); |
2eec3b4e RS |
3536 | tail = prev; |
3537 | } | |
3538 | } | |
3539 | ||
c2d5b10f | 3540 | buf->overlay_center = pos; |
2eec3b4e | 3541 | } |
2b1bdf65 | 3542 | |
423cdb46 | 3543 | void |
d311d28c | 3544 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3545 | { |
3546 | /* After an insertion, the lists are still sorted properly, | |
3547 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3548 | if (current_buffer->overlay_center >= pos) |
3549 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3550 | } |
3551 | ||
3552 | void | |
d311d28c | 3553 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3554 | { |
c2d5b10f | 3555 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3556 | /* The deletion was to our right. No change needed; the before- and |
3557 | after-lists are still consistent. */ | |
3558 | ; | |
d311d28c | 3559 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3560 | /* The deletion was to our left. We need to adjust the center value |
3561 | to account for the change in position, but the lists are consistent | |
3562 | given the new value. */ | |
c2d5b10f | 3563 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3564 | else |
3565 | /* We're right in the middle. There might be things on the after-list | |
3566 | that now belong on the before-list. Recentering will move them, | |
3567 | and also update the center point. */ | |
3568 | recenter_overlay_lists (current_buffer, pos); | |
3569 | } | |
3570 | ||
2b1bdf65 KH |
3571 | /* Fix up overlays that were garbled as a result of permuting markers |
3572 | in the range START through END. Any overlay with at least one | |
3573 | endpoint in this range will need to be unlinked from the overlay | |
3574 | list and reinserted in its proper place. | |
3575 | Such an overlay might even have negative size at this point. | |
6b61353c | 3576 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3577 | void |
d311d28c | 3578 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3579 | { |
6af718a4 | 3580 | Lisp_Object overlay; |
5df8f01b PE |
3581 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3582 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3583 | /* These are either nil, indicating that before_list or after_list |
3584 | should be assigned, or the cons cell the cdr of which should be | |
3585 | assigned. */ | |
2410d73a | 3586 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3587 | /* 'Parent', likewise, indicates a cons cell or |
fd318b54 | 3588 | current_buffer->overlays_before or overlays_after, depending |
1138e742 | 3589 | which loop we're in. */ |
2410d73a | 3590 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3591 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3592 | |
3593 | /* This algorithm shifts links around instead of consing and GCing. | |
3594 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3595 | well-formed list except that its last element, the CDR of beforep |
3596 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3597 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3598 | that before_list isn't initialized, although it may look | |
3599 | strange. */ | |
fd318b54 | 3600 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3601 | { |
2410d73a | 3602 | XSETMISC (overlay, tail); |
6b61353c | 3603 | |
2b1bdf65 | 3604 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3605 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3606 | ||
3607 | /* If the overlay is backwards, make it empty. */ | |
3608 | if (endpos < startpos) | |
3609 | { | |
3610 | startpos = endpos; | |
3611 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3612 | Qnil); | |
3613 | } | |
3614 | ||
2b1bdf65 KH |
3615 | if (endpos < start) |
3616 | break; | |
60ebfdf3 | 3617 | |
2b1bdf65 KH |
3618 | if (endpos < end |
3619 | || (startpos >= start && startpos < end)) | |
3620 | { | |
2b1bdf65 KH |
3621 | /* Add it to the end of the wrong list. Later on, |
3622 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3623 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3624 | { |
2410d73a | 3625 | if (!afterp) |
1138e742 KR |
3626 | after_list = tail; |
3627 | else | |
2410d73a | 3628 | afterp->next = tail; |
1138e742 | 3629 | afterp = tail; |
2b1bdf65 KH |
3630 | } |
3631 | else | |
3632 | { | |
2410d73a | 3633 | if (!beforep) |
1138e742 KR |
3634 | before_list = tail; |
3635 | else | |
2410d73a | 3636 | beforep->next = tail; |
1138e742 | 3637 | beforep = tail; |
2b1bdf65 | 3638 | } |
2410d73a | 3639 | if (!parent) |
0c94c8d6 | 3640 | set_buffer_overlays_before (current_buffer, tail->next); |
1138e742 | 3641 | else |
2410d73a SM |
3642 | parent->next = tail->next; |
3643 | tail = tail->next; | |
2b1bdf65 KH |
3644 | } |
3645 | else | |
2410d73a | 3646 | parent = tail, tail = parent->next; |
2b1bdf65 | 3647 | } |
fd318b54 | 3648 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3649 | { |
2410d73a | 3650 | XSETMISC (overlay, tail); |
6b61353c | 3651 | |
2b1bdf65 | 3652 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3653 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3654 | ||
3655 | /* If the overlay is backwards, make it empty. */ | |
3656 | if (endpos < startpos) | |
3657 | { | |
3658 | startpos = endpos; | |
3659 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3660 | Qnil); |
6b61353c KH |
3661 | } |
3662 | ||
2b1bdf65 KH |
3663 | if (startpos >= end) |
3664 | break; | |
6b61353c | 3665 | |
2b1bdf65 KH |
3666 | if (startpos >= start |
3667 | || (endpos >= start && endpos < end)) | |
3668 | { | |
c2d5b10f | 3669 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3670 | { |
2410d73a | 3671 | if (!afterp) |
1138e742 KR |
3672 | after_list = tail; |
3673 | else | |
2410d73a | 3674 | afterp->next = tail; |
1138e742 | 3675 | afterp = tail; |
2b1bdf65 KH |
3676 | } |
3677 | else | |
3678 | { | |
2410d73a | 3679 | if (!beforep) |
1138e742 KR |
3680 | before_list = tail; |
3681 | else | |
2410d73a | 3682 | beforep->next = tail; |
1138e742 | 3683 | beforep = tail; |
2b1bdf65 | 3684 | } |
2410d73a | 3685 | if (!parent) |
0c94c8d6 | 3686 | set_buffer_overlays_after (current_buffer, tail->next); |
1138e742 | 3687 | else |
2410d73a SM |
3688 | parent->next = tail->next; |
3689 | tail = tail->next; | |
2b1bdf65 KH |
3690 | } |
3691 | else | |
2410d73a | 3692 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3693 | } |
3694 | ||
3695 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3696 | and let the recenter function make it sane again. */ | |
2410d73a | 3697 | if (beforep) |
1138e742 | 3698 | { |
fd318b54 | 3699 | beforep->next = current_buffer->overlays_before; |
0c94c8d6 | 3700 | set_buffer_overlays_before (current_buffer, before_list); |
1138e742 | 3701 | } |
2b1bdf65 | 3702 | |
2410d73a | 3703 | if (afterp) |
1138e742 | 3704 | { |
fd318b54 | 3705 | afterp->next = current_buffer->overlays_after; |
0c94c8d6 | 3706 | set_buffer_overlays_after (current_buffer, after_list); |
1138e742 | 3707 | } |
c2d5b10f | 3708 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3709 | } |
3b06f880 KH |
3710 | |
3711 | /* We have two types of overlay: the one whose ending marker is | |
3712 | after-insertion-marker (this is the usual case) and the one whose | |
3713 | ending marker is before-insertion-marker. When `overlays_before' | |
3714 | contains overlays of the latter type and the former type in this | |
3715 | order and both overlays end at inserting position, inserting a text | |
3716 | increases only the ending marker of the latter type, which results | |
3717 | in incorrect ordering of `overlays_before'. | |
3718 | ||
3719 | This function fixes ordering of overlays in the slot | |
3720 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3721 | was at PREV, and now is at POS. */ | |
3722 | ||
01136e9b | 3723 | void |
d311d28c | 3724 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3725 | { |
2410d73a | 3726 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
fd318b54 | 3727 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; |
2410d73a | 3728 | Lisp_Object tem; |
d311d28c | 3729 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3730 | |
3731 | /* After the insertion, the several overlays may be in incorrect | |
3732 | order. The possibility is that, in the list `overlays_before', | |
3733 | an overlay which ends at POS appears after an overlay which ends | |
3734 | at PREV. Since POS is greater than PREV, we must fix the | |
3735 | ordering of these overlays, by moving overlays ends at POS before | |
3736 | the overlays ends at PREV. */ | |
3737 | ||
3738 | /* At first, find a place where disordered overlays should be linked | |
3739 | in. It is where an overlay which end before POS exists. (i.e. an | |
3740 | overlay whose ending marker is after-insertion-marker if disorder | |
3741 | exists). */ | |
2410d73a SM |
3742 | while (tail |
3743 | && (XSETMISC (tem, tail), | |
3744 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3745 | { |
3746 | parent = tail; | |
2410d73a | 3747 | tail = tail->next; |
1138e742 | 3748 | } |
3b06f880 KH |
3749 | |
3750 | /* If we don't find such an overlay, | |
3751 | or the found one ends before PREV, | |
3752 | or the found one is the last one in the list, | |
3753 | we don't have to fix anything. */ | |
f93ad4cf | 3754 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3755 | return; |
3756 | ||
1138e742 KR |
3757 | right_pair = parent; |
3758 | parent = tail; | |
2410d73a | 3759 | tail = tail->next; |
3b06f880 | 3760 | |
1138e742 | 3761 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3762 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3763 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3764 | we found an overlay which ends before PREV, the remaining | |
3765 | overlays are in correct order. */ | |
2410d73a | 3766 | while (tail) |
3b06f880 | 3767 | { |
2410d73a SM |
3768 | XSETMISC (tem, tail); |
3769 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3770 | |
3771 | if (end == pos) | |
3772 | { /* This overlay is disordered. */ | |
2410d73a | 3773 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3774 | |
3775 | /* Unlink the found overlay. */ | |
2410d73a SM |
3776 | tail = found->next; |
3777 | parent->next = tail; | |
1138e742 KR |
3778 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3779 | and link it into the right place. */ | |
2410d73a | 3780 | if (!right_pair) |
1138e742 | 3781 | { |
fd318b54 | 3782 | found->next = bp->overlays_before; |
0c94c8d6 | 3783 | set_buffer_overlays_before (bp, found); |
1138e742 KR |
3784 | } |
3785 | else | |
3786 | { | |
2410d73a SM |
3787 | found->next = right_pair->next; |
3788 | right_pair->next = found; | |
1138e742 | 3789 | } |
3b06f880 KH |
3790 | } |
3791 | else if (end == prev) | |
1138e742 KR |
3792 | { |
3793 | parent = tail; | |
2410d73a | 3794 | tail = tail->next; |
1138e742 | 3795 | } |
3b06f880 KH |
3796 | else /* No more disordered overlay. */ |
3797 | break; | |
3798 | } | |
3799 | } | |
2eec3b4e | 3800 | \f |
52f8ec73 | 3801 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3802 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3803 | (Lisp_Object object) |
52f8ec73 JB |
3804 | { |
3805 | return (OVERLAYP (object) ? Qt : Qnil); | |
3806 | } | |
3807 | ||
acac2700 | 3808 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3809 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3810 | If omitted, BUFFER defaults to the current buffer. |
3811 | BEG and END may be integers or markers. | |
a625ee20 RS |
3812 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3813 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3814 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3815 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3816 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3817 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3818 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3819 | { |
3820 | Lisp_Object overlay; | |
5c4f68f1 | 3821 | struct buffer *b; |
2eec3b4e | 3822 | |
5c4f68f1 | 3823 | if (NILP (buffer)) |
67180c6a | 3824 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3825 | else |
b7826503 | 3826 | CHECK_BUFFER (buffer); |
883047b9 JB |
3827 | if (MARKERP (beg) |
3828 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3829 | error ("Marker points into wrong buffer"); | |
3830 | if (MARKERP (end) | |
3831 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3832 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3833 | |
b7826503 PJ |
3834 | CHECK_NUMBER_COERCE_MARKER (beg); |
3835 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3836 | |
883047b9 | 3837 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3838 | { |
c99fc30f KH |
3839 | Lisp_Object temp; |
3840 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3841 | } |
883047b9 JB |
3842 | |
3843 | b = XBUFFER (buffer); | |
3844 | ||
3845 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3846 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3847 | |
acac2700 RS |
3848 | if (!NILP (front_advance)) |
3849 | XMARKER (beg)->insertion_type = 1; | |
3850 | if (!NILP (rear_advance)) | |
3851 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3852 | |
d7a7fda3 | 3853 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3854 | |
177c0ea7 | 3855 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3856 | end = OVERLAY_END (overlay); |
c2d5b10f | 3857 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3858 | { |
64edc777 | 3859 | eassert (b->overlays_after || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3860 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 3861 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 3862 | } |
2eec3b4e | 3863 | else |
2410d73a | 3864 | { |
64edc777 | 3865 | eassert (b->overlays_before || (XOVERLAY (overlay)->next == NULL)); |
090cf9db | 3866 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 3867 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 3868 | } |
2eec3b4e | 3869 | /* This puts it in the right list, and in the right order. */ |
c2d5b10f | 3870 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3871 | |
b61982dd JB |
3872 | /* We don't need to redisplay the region covered by the overlay, because |
3873 | the overlay has no properties at the moment. */ | |
3874 | ||
2eec3b4e RS |
3875 | return overlay; |
3876 | } | |
876aa27c RS |
3877 | \f |
3878 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3879 | ||
3880 | static void | |
d311d28c | 3881 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3882 | { |
876aa27c RS |
3883 | if (start > end) |
3884 | { | |
d311d28c | 3885 | ptrdiff_t temp = start; |
26f545d7 GM |
3886 | start = end; |
3887 | end = temp; | |
876aa27c RS |
3888 | } |
3889 | ||
481b5054 | 3890 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3891 | |
98a07056 DA |
3892 | /* If BUF is visible, consider updating the display if ... */ |
3893 | if (buffer_window_count (buf) > 0) | |
3894 | { | |
3895 | /* ... it's visible in other window than selected, */ | |
3896 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3897 | windows_or_buffers_changed = 1; | |
3898 | /* ... or if we modify an overlay at the end of the buffer | |
3899 | and so we cannot be sure that window end is still valid. */ | |
3900 | else if (end >= ZV && start <= ZV) | |
3901 | windows_or_buffers_changed = 1; | |
3902 | } | |
876aa27c | 3903 | |
d8b9150f | 3904 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3905 | } |
2eec3b4e | 3906 | |
7b7ae965 DA |
3907 | /* Remove OVERLAY from LIST. */ |
3908 | ||
2410d73a | 3909 | static struct Lisp_Overlay * |
d3da34e0 | 3910 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3911 | { |
7b7ae965 DA |
3912 | register struct Lisp_Overlay *tail, **prev = &list; |
3913 | ||
3914 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3915 | if (tail == overlay) | |
2410d73a | 3916 | { |
7b7ae965 | 3917 | *prev = overlay->next; |
2410d73a SM |
3918 | overlay->next = NULL; |
3919 | break; | |
3920 | } | |
3921 | return list; | |
3922 | } | |
3923 | ||
4cb3e6b3 DA |
3924 | /* Remove OVERLAY from both overlay lists of B. */ |
3925 | ||
3926 | static void | |
3927 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3928 | { | |
3929 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3930 | ||
0c94c8d6 PE |
3931 | set_buffer_overlays_before (b, unchain_overlay (b->overlays_before, ov)); |
3932 | set_buffer_overlays_after (b, unchain_overlay (b->overlays_after, ov)); | |
fd318b54 | 3933 | eassert (XOVERLAY (overlay)->next == NULL); |
4cb3e6b3 DA |
3934 | } |
3935 | ||
5c4f68f1 | 3936 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3937 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3938 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3939 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3940 | buffer. */) |
5842a27b | 3941 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3942 | { |
471fe23d | 3943 | struct buffer *b, *ob = 0; |
0a4469c9 | 3944 | Lisp_Object obuffer; |
d311d28c | 3945 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3946 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3947 | |
b7826503 | 3948 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3949 | if (NILP (buffer)) |
3950 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3951 | if (NILP (buffer)) |
67180c6a | 3952 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3953 | CHECK_BUFFER (buffer); |
883047b9 | 3954 | |
471fe23d TN |
3955 | if (NILP (Fbuffer_live_p (buffer))) |
3956 | error ("Attempt to move overlay to a dead buffer"); | |
3957 | ||
883047b9 JB |
3958 | if (MARKERP (beg) |
3959 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3960 | error ("Marker points into wrong buffer"); | |
3961 | if (MARKERP (end) | |
3962 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3963 | error ("Marker points into wrong buffer"); | |
3964 | ||
b7826503 PJ |
3965 | CHECK_NUMBER_COERCE_MARKER (beg); |
3966 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3967 | |
471fe23d | 3968 | if (XINT (beg) > XINT (end)) |
02481186 | 3969 | { |
471fe23d TN |
3970 | Lisp_Object temp; |
3971 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3972 | } |
3973 | ||
9d7608b7 KH |
3974 | specbind (Qinhibit_quit, Qt); |
3975 | ||
0a4469c9 | 3976 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3977 | b = XBUFFER (buffer); |
471fe23d TN |
3978 | |
3979 | if (!NILP (obuffer)) | |
3980 | { | |
3981 | ob = XBUFFER (obuffer); | |
3982 | ||
3983 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3984 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3985 | ||
4cb3e6b3 | 3986 | unchain_both (ob, overlay); |
471fe23d TN |
3987 | } |
3988 | ||
3989 | /* Set the overlay boundaries, which may clip them. */ | |
3990 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3991 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3992 | ||
3993 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3994 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3995 | |
c82ed728 | 3996 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3997 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3998 | { |
3999 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
4000 | if (ob) |
4001 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
4002 | |
4003 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 4004 | modify_overlay (b, n_beg, n_end); |
50760c4a | 4005 | } |
c82ed728 JB |
4006 | else |
4007 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
4008 | { | |
79cce3f2 PE |
4009 | if (o_beg == n_beg) |
4010 | modify_overlay (b, o_end, n_end); | |
4011 | else if (o_end == n_end) | |
4012 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 4013 | else |
79cce3f2 | 4014 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 4015 | } |
b61982dd | 4016 | |
471fe23d TN |
4017 | /* Delete the overlay if it is empty after clipping and has the |
4018 | evaporate property. */ | |
4019 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
4020 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 4021 | |
471fe23d TN |
4022 | /* Put the overlay into the new buffer's overlay lists, first on the |
4023 | wrong list. */ | |
4024 | if (n_end < b->overlay_center) | |
2410d73a | 4025 | { |
fd318b54 | 4026 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 4027 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 4028 | } |
2eec3b4e | 4029 | else |
2410d73a | 4030 | { |
fd318b54 | 4031 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 4032 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 4033 | } |
2eec3b4e RS |
4034 | |
4035 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4036 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4037 | |
0a4469c9 | 4038 | return unbind_to (count, overlay); |
2eec3b4e RS |
4039 | } |
4040 | ||
4041 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 4042 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 4043 | (Lisp_Object overlay) |
2eec3b4e | 4044 | { |
0a4469c9 | 4045 | Lisp_Object buffer; |
5c4f68f1 | 4046 | struct buffer *b; |
d311d28c | 4047 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 4048 | |
b7826503 | 4049 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4050 | |
0a4469c9 RS |
4051 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4052 | if (NILP (buffer)) | |
4053 | return Qnil; | |
4054 | ||
4055 | b = XBUFFER (buffer); | |
0a4469c9 | 4056 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4057 | |
4cb3e6b3 | 4058 | unchain_both (b, overlay); |
041a49a6 | 4059 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 4060 | |
e58c389d | 4061 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4062 | display optimizations for the affected buffer, on the basis that |
4063 | these strings may contain newlines. This is easier to do than to | |
4064 | check for that situation during redisplay. */ | |
4065 | if (!windows_or_buffers_changed | |
4066 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4067 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4068 | b->prevent_redisplay_optimizations_p = 1; | |
4069 | ||
0a4469c9 | 4070 | return unbind_to (count, Qnil); |
2eec3b4e | 4071 | } |
c5e28e39 MR |
4072 | |
4073 | DEFUN ("delete-all-overlays", Fdelete_all_overlays, Sdelete_all_overlays, 0, 1, 0, | |
4074 | doc: /* Delete all overlays of BUFFER. | |
4075 | BUFFER omitted or nil means delete all overlays of the current | |
4076 | buffer. */) | |
4077 | (Lisp_Object buffer) | |
4078 | { | |
4079 | register struct buffer *buf; | |
4080 | ||
4081 | if (NILP (buffer)) | |
4082 | buf = current_buffer; | |
4083 | else | |
4084 | { | |
4085 | CHECK_BUFFER (buffer); | |
4086 | buf = XBUFFER (buffer); | |
4087 | } | |
4088 | ||
4089 | delete_all_overlays (buf); | |
26d4541d | 4090 | return Qnil; |
c5e28e39 | 4091 | } |
2eec3b4e | 4092 | \f |
8ebafa8d JB |
4093 | /* Overlay dissection functions. */ |
4094 | ||
a7ca3326 | 4095 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 4096 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 4097 | (Lisp_Object overlay) |
8ebafa8d | 4098 | { |
b7826503 | 4099 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4100 | |
4101 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4102 | } | |
4103 | ||
a7ca3326 | 4104 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 4105 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 4106 | (Lisp_Object overlay) |
8ebafa8d | 4107 | { |
b7826503 | 4108 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4109 | |
4110 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4111 | } | |
4112 | ||
4113 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4114 | doc: /* Return the buffer OVERLAY belongs to. |
4115 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 4116 | (Lisp_Object overlay) |
8ebafa8d | 4117 | { |
b7826503 | 4118 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4119 | |
4120 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4121 | } | |
4122 | ||
4123 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4124 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4125 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 4126 | OVERLAY. */) |
5842a27b | 4127 | (Lisp_Object overlay) |
8ebafa8d | 4128 | { |
b7826503 | 4129 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4130 | |
c644523b | 4131 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4132 | } |
4133 | ||
4134 | \f | |
2eec3b4e | 4135 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4136 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 4137 | (Lisp_Object pos) |
2eec3b4e | 4138 | { |
b081724f | 4139 | ptrdiff_t len, noverlays; |
2eec3b4e | 4140 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
4141 | Lisp_Object result; |
4142 | ||
b7826503 | 4143 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4144 | |
4145 | len = 10; | |
a9800ae8 | 4146 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 4147 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4148 | |
4149 | /* Put all the overlays we want in a vector in overlay_vec. | |
4150 | Store the length in len. */ | |
2a77a7d7 | 4151 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
090cf9db | 4152 | NULL, NULL, 0); |
2eec3b4e RS |
4153 | |
4154 | /* Make a list of them all. */ | |
4155 | result = Flist (noverlays, overlay_vec); | |
4156 | ||
9ac0d9e0 | 4157 | xfree (overlay_vec); |
2eec3b4e RS |
4158 | return result; |
4159 | } | |
4160 | ||
74514898 | 4161 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4162 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4163 | Overlap means that at least one character is contained within the overlay |
4164 | and also contained within the specified region. | |
7723e095 MR |
4165 | Empty overlays are included in the result if they are located at BEG, |
4166 | between BEG and END, or at END provided END denotes the position at the | |
4167 | end of the buffer. */) | |
5842a27b | 4168 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 4169 | { |
21514da7 | 4170 | ptrdiff_t len, noverlays; |
74514898 | 4171 | Lisp_Object *overlay_vec; |
74514898 RS |
4172 | Lisp_Object result; |
4173 | ||
b7826503 PJ |
4174 | CHECK_NUMBER_COERCE_MARKER (beg); |
4175 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4176 | |
4177 | len = 10; | |
38182d90 | 4178 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
4179 | |
4180 | /* Put all the overlays we want in a vector in overlay_vec. | |
4181 | Store the length in len. */ | |
4182 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4183 | NULL, NULL); |
74514898 RS |
4184 | |
4185 | /* Make a list of them all. */ | |
4186 | result = Flist (noverlays, overlay_vec); | |
4187 | ||
4188 | xfree (overlay_vec); | |
4189 | return result; | |
4190 | } | |
4191 | ||
a7ca3326 | 4192 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4193 | 1, 1, 0, |
7ee72033 | 4194 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4195 | If there are no overlay boundaries from POS to (point-max), |
4196 | the value is (point-max). */) | |
5842a27b | 4197 | (Lisp_Object pos) |
2eec3b4e | 4198 | { |
b081724f | 4199 | ptrdiff_t i, len, noverlays; |
d311d28c | 4200 | ptrdiff_t endpos; |
2eec3b4e | 4201 | Lisp_Object *overlay_vec; |
2eec3b4e | 4202 | |
b7826503 | 4203 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4204 | |
4205 | len = 10; | |
38182d90 | 4206 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4207 | |
4208 | /* Put all the overlays we want in a vector in overlay_vec. | |
4209 | Store the length in len. | |
4210 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4211 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4212 | &endpos, 0, 1); |
2eec3b4e RS |
4213 | |
4214 | /* If any of these overlays ends before endpos, | |
4215 | use its ending point instead. */ | |
4216 | for (i = 0; i < noverlays; i++) | |
4217 | { | |
4218 | Lisp_Object oend; | |
d311d28c | 4219 | ptrdiff_t oendpos; |
2eec3b4e RS |
4220 | |
4221 | oend = OVERLAY_END (overlay_vec[i]); | |
4222 | oendpos = OVERLAY_POSITION (oend); | |
4223 | if (oendpos < endpos) | |
4224 | endpos = oendpos; | |
1ab256cb RM |
4225 | } |
4226 | ||
9ac0d9e0 | 4227 | xfree (overlay_vec); |
2eec3b4e RS |
4228 | return make_number (endpos); |
4229 | } | |
239c932b | 4230 | |
a7ca3326 | 4231 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4232 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4233 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4234 | If there are no overlay boundaries from (point-min) to POS, |
4235 | the value is (point-min). */) | |
5842a27b | 4236 | (Lisp_Object pos) |
239c932b | 4237 | { |
d311d28c | 4238 | ptrdiff_t prevpos; |
239c932b | 4239 | Lisp_Object *overlay_vec; |
b081724f | 4240 | ptrdiff_t len; |
239c932b | 4241 | |
b7826503 | 4242 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4243 | |
624bbdc4 RS |
4244 | /* At beginning of buffer, we know the answer; |
4245 | avoid bug subtracting 1 below. */ | |
4246 | if (XINT (pos) == BEGV) | |
4247 | return pos; | |
4248 | ||
017f0539 | 4249 | len = 10; |
38182d90 | 4250 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4251 | |
239c932b RS |
4252 | /* Put all the overlays we want in a vector in overlay_vec. |
4253 | Store the length in len. | |
daa1c109 | 4254 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4255 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4256 | 0, &prevpos, 1); |
239c932b | 4257 | |
239c932b RS |
4258 | xfree (overlay_vec); |
4259 | return make_number (prevpos); | |
4260 | } | |
2eec3b4e RS |
4261 | \f |
4262 | /* These functions are for debugging overlays. */ | |
4263 | ||
4264 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4265 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4266 | The car has all the overlays before the overlay center; |
4267 | the cdr has all the overlays after the overlay center. | |
4268 | Recentering overlays moves overlays between these lists. | |
4269 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4270 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4271 | (void) |
2eec3b4e | 4272 | { |
2410d73a SM |
4273 | struct Lisp_Overlay *ol; |
4274 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 | 4275 | |
fd318b54 | 4276 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) |
2410d73a SM |
4277 | { |
4278 | XSETMISC (tmp, ol); | |
4279 | before = Fcons (tmp, before); | |
4280 | } | |
fd318b54 | 4281 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) |
2410d73a SM |
4282 | { |
4283 | XSETMISC (tmp, ol); | |
4284 | after = Fcons (tmp, after); | |
4285 | } | |
4cb3e6b3 | 4286 | |
2410d73a | 4287 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4288 | } |
4289 | ||
4290 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4291 | doc: /* Recenter the overlays of the current buffer around position POS. |
4292 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4293 | for positions far away from POS). */) | |
5842a27b | 4294 | (Lisp_Object pos) |
2eec3b4e | 4295 | { |
d311d28c | 4296 | ptrdiff_t p; |
b7826503 | 4297 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4298 | |
d311d28c PE |
4299 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4300 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4301 | return Qnil; |
4302 | } | |
4303 | \f | |
a7ca3326 | 4304 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4305 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4306 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4307 | { |
b7826503 | 4308 | CHECK_OVERLAY (overlay); |
c644523b | 4309 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4310 | } |
4311 | ||
4312 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4313 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4314 | VALUE will be returned.*/) | |
5842a27b | 4315 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4316 | { |
48e2e3ba | 4317 | Lisp_Object tail, buffer; |
37ef52bb | 4318 | bool changed; |
2eec3b4e | 4319 | |
b7826503 | 4320 | CHECK_OVERLAY (overlay); |
b61982dd | 4321 | |
274a9425 RS |
4322 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4323 | ||
c644523b | 4324 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4325 | CONSP (tail) && CONSP (XCDR (tail)); |
4326 | tail = XCDR (XCDR (tail))) | |
4327 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4328 | { |
7539e11f | 4329 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4330 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4331 | goto found; |
274a9425 | 4332 | } |
9d7608b7 KH |
4333 | /* It wasn't in the list, so add it to the front. */ |
4334 | changed = !NILP (value); | |
c644523b DA |
4335 | set_overlay_plist |
4336 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4337 | found: |
4338 | if (! NILP (buffer)) | |
4339 | { | |
4340 | if (changed) | |
876aa27c | 4341 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4342 | marker_position (OVERLAY_START (overlay)), |
4343 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4344 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4345 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4346 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4347 | Fdelete_overlay (overlay); | |
4348 | } | |
7d63db98 | 4349 | |
2eec3b4e | 4350 | return value; |
1ab256cb RM |
4351 | } |
4352 | \f | |
9115729e KH |
4353 | /* Subroutine of report_overlay_modification. */ |
4354 | ||
4355 | /* Lisp vector holding overlay hook functions to call. | |
4356 | Vector elements come in pairs. | |
4357 | Each even-index element is a list of hook functions. | |
4358 | The following odd-index element is the overlay they came from. | |
4359 | ||
4360 | Before the buffer change, we fill in this vector | |
4361 | as we call overlay hook functions. | |
4362 | After the buffer change, we get the functions to call from this vector. | |
4363 | This way we always call the same functions before and after the change. */ | |
4364 | static Lisp_Object last_overlay_modification_hooks; | |
4365 | ||
4366 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4367 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4368 | |
4369 | /* Add one functionlist/overlay pair | |
4370 | to the end of last_overlay_modification_hooks. */ | |
4371 | ||
4372 | static void | |
d3da34e0 | 4373 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4374 | { |
d311d28c | 4375 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4376 | |
d311d28c PE |
4377 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4378 | last_overlay_modification_hooks = | |
4379 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4380 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4381 | functionlist); last_overlay_modification_hooks_used++; | |
4382 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4383 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4384 | } |
4385 | \f | |
173f2a64 RS |
4386 | /* Run the modification-hooks of overlays that include |
4387 | any part of the text in START to END. | |
9115729e KH |
4388 | If this change is an insertion, also |
4389 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4390 | and the insert-after-hooks of overlay ending at START. |
4391 | ||
4392 | This is called both before and after the modification. | |
37ef52bb | 4393 | AFTER is true when we call after the modification. |
930a9140 | 4394 | |
9115729e KH |
4395 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4396 | When AFTER is nonzero, they are the start position, | |
4397 | the position after the inserted new text, | |
4398 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4399 | |
4400 | void | |
37ef52bb | 4401 | report_overlay_modification (Lisp_Object start, Lisp_Object end, bool after, |
d3da34e0 | 4402 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4403 | { |
2410d73a SM |
4404 | Lisp_Object prop, overlay; |
4405 | struct Lisp_Overlay *tail; | |
37ef52bb PE |
4406 | /* True if this change is an insertion. */ |
4407 | bool insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4408 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4409 | |
4410 | overlay = Qnil; | |
2410d73a | 4411 | tail = NULL; |
9115729e | 4412 | |
27c6b98e SM |
4413 | /* We used to run the functions as soon as we found them and only register |
4414 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4415 | case. But running elisp code as we traverse the list of overlays is | |
4416 | painful because the list can be modified by the elisp code so we had to | |
4417 | copy at several places. We now simply do a read-only traversal that | |
4418 | only collects the functions to run and we run them afterwards. It's | |
4419 | simpler, especially since all the code was already there. -stef */ | |
4420 | ||
a615c6dc | 4421 | if (!after) |
173f2a64 | 4422 | { |
a615c6dc SM |
4423 | /* We are being called before a change. |
4424 | Scan the overlays to find the functions to call. */ | |
4425 | last_overlay_modification_hooks_used = 0; | |
fd318b54 | 4426 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4427 | { |
d311d28c | 4428 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4429 | Lisp_Object ostart, oend; |
4430 | ||
2410d73a | 4431 | XSETMISC (overlay, tail); |
a615c6dc SM |
4432 | |
4433 | ostart = OVERLAY_START (overlay); | |
4434 | oend = OVERLAY_END (overlay); | |
4435 | endpos = OVERLAY_POSITION (oend); | |
4436 | if (XFASTINT (start) > endpos) | |
4437 | break; | |
4438 | startpos = OVERLAY_POSITION (ostart); | |
4439 | if (insertion && (XFASTINT (start) == startpos | |
4440 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4441 | { |
a615c6dc SM |
4442 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4443 | if (!NILP (prop)) | |
4444 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4445 | } |
a615c6dc SM |
4446 | if (insertion && (XFASTINT (start) == endpos |
4447 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4448 | { |
a615c6dc SM |
4449 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4450 | if (!NILP (prop)) | |
4451 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4452 | } |
a615c6dc SM |
4453 | /* Test for intersecting intervals. This does the right thing |
4454 | for both insertion and deletion. */ | |
4455 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4456 | { |
a615c6dc SM |
4457 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4458 | if (!NILP (prop)) | |
4459 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4460 | } |
173f2a64 | 4461 | } |
60ebfdf3 | 4462 | |
fd318b54 | 4463 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4464 | { |
d311d28c | 4465 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4466 | Lisp_Object ostart, oend; |
4467 | ||
2410d73a | 4468 | XSETMISC (overlay, tail); |
a615c6dc SM |
4469 | |
4470 | ostart = OVERLAY_START (overlay); | |
4471 | oend = OVERLAY_END (overlay); | |
4472 | startpos = OVERLAY_POSITION (ostart); | |
4473 | endpos = OVERLAY_POSITION (oend); | |
4474 | if (XFASTINT (end) < startpos) | |
4475 | break; | |
4476 | if (insertion && (XFASTINT (start) == startpos | |
4477 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4478 | { |
a615c6dc SM |
4479 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4480 | if (!NILP (prop)) | |
4481 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4482 | } |
a615c6dc SM |
4483 | if (insertion && (XFASTINT (start) == endpos |
4484 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4485 | { |
a615c6dc SM |
4486 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4487 | if (!NILP (prop)) | |
4488 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4489 | } |
a615c6dc SM |
4490 | /* Test for intersecting intervals. This does the right thing |
4491 | for both insertion and deletion. */ | |
4492 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4493 | { |
a615c6dc SM |
4494 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4495 | if (!NILP (prop)) | |
4496 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4497 | } |
173f2a64 RS |
4498 | } |
4499 | } | |
55b48893 | 4500 | |
a615c6dc SM |
4501 | GCPRO4 (overlay, arg1, arg2, arg3); |
4502 | { | |
4503 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4504 | First copy the vector contents, in case some of these hooks | |
4505 | do subsequent modification of the buffer. */ | |
d311d28c | 4506 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4507 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4508 | ptrdiff_t i; |
a615c6dc | 4509 | |
72af86bd | 4510 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4511 | size * word_size); |
a615c6dc SM |
4512 | gcpro1.var = copy; |
4513 | gcpro1.nvars = size; | |
4514 | ||
4515 | for (i = 0; i < size;) | |
4516 | { | |
8f54f30a PE |
4517 | Lisp_Object prop_i, overlay_i; |
4518 | prop_i = copy[i++]; | |
4519 | overlay_i = copy[i++]; | |
4520 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4521 | } |
4522 | } | |
55b48893 | 4523 | UNGCPRO; |
173f2a64 RS |
4524 | } |
4525 | ||
4526 | static void | |
37ef52bb | 4527 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, bool after, |
d3da34e0 | 4528 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4529 | { |
930a9140 | 4530 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4531 | |
930a9140 | 4532 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4533 | |
6d70a280 | 4534 | while (CONSP (list)) |
173f2a64 | 4535 | { |
930a9140 | 4536 | if (NILP (arg3)) |
6d70a280 | 4537 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4538 | else |
6d70a280 SM |
4539 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4540 | list = XCDR (list); | |
173f2a64 RS |
4541 | } |
4542 | UNGCPRO; | |
4543 | } | |
9d7608b7 KH |
4544 | |
4545 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4546 | property is set. */ | |
4547 | void | |
d311d28c | 4548 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4549 | { |
2410d73a SM |
4550 | Lisp_Object overlay, hit_list; |
4551 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4552 | |
4553 | hit_list = Qnil; | |
c2d5b10f | 4554 | if (pos <= current_buffer->overlay_center) |
fd318b54 | 4555 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4556 | { |
d311d28c | 4557 | ptrdiff_t endpos; |
2410d73a | 4558 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4559 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4560 | if (endpos < pos) | |
4561 | break; | |
4562 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4563 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4564 | hit_list = Fcons (overlay, hit_list); |
4565 | } | |
4566 | else | |
fd318b54 | 4567 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4568 | { |
d311d28c | 4569 | ptrdiff_t startpos; |
2410d73a | 4570 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4571 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4572 | if (startpos > pos) | |
4573 | break; | |
4574 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4575 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4576 | hit_list = Fcons (overlay, hit_list); |
4577 | } | |
7539e11f KR |
4578 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4579 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4580 | } |
1bf08baf | 4581 | |
b86af064 GM |
4582 | /*********************************************************************** |
4583 | Allocation with mmap | |
4584 | ***********************************************************************/ | |
4585 | ||
4586 | #ifdef USE_MMAP_FOR_BUFFERS | |
4587 | ||
4588 | #include <sys/types.h> | |
4589 | #include <sys/mman.h> | |
4590 | ||
4591 | #ifndef MAP_ANON | |
4592 | #ifdef MAP_ANONYMOUS | |
4593 | #define MAP_ANON MAP_ANONYMOUS | |
4594 | #else | |
4595 | #define MAP_ANON 0 | |
4596 | #endif | |
4597 | #endif | |
4598 | ||
09dfdf85 GM |
4599 | #ifndef MAP_FAILED |
4600 | #define MAP_FAILED ((void *) -1) | |
4601 | #endif | |
4602 | ||
b86af064 | 4603 | #include <stdio.h> |
b86af064 GM |
4604 | |
4605 | #if MAP_ANON == 0 | |
4606 | #include <fcntl.h> | |
4607 | #endif | |
4608 | ||
4609 | #include "coding.h" | |
4610 | ||
4611 | ||
4612 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4613 | The current implementation lets the system select mapped | |
4614 | addresses; we're not using MAP_FIXED in general, except when | |
4615 | trying to enlarge regions. | |
4616 | ||
4617 | Each mapped region starts with a mmap_region structure, the user | |
4618 | area starts after that structure, aligned to MEM_ALIGN. | |
4619 | ||
4620 | +-----------------------+ | |
4621 | | struct mmap_info + | | |
4622 | | padding | | |
4623 | +-----------------------+ | |
4624 | | user data | | |
4625 | | | | |
4626 | | | | |
4627 | +-----------------------+ */ | |
4628 | ||
4629 | struct mmap_region | |
4630 | { | |
4631 | /* User-specified size. */ | |
4632 | size_t nbytes_specified; | |
177c0ea7 | 4633 | |
b86af064 GM |
4634 | /* Number of bytes mapped */ |
4635 | size_t nbytes_mapped; | |
4636 | ||
4637 | /* Pointer to the location holding the address of the memory | |
4638 | allocated with the mmap'd block. The variable actually points | |
4639 | after this structure. */ | |
261cb4bb | 4640 | void **var; |
b86af064 GM |
4641 | |
4642 | /* Next and previous in list of all mmap'd regions. */ | |
4643 | struct mmap_region *next, *prev; | |
4644 | }; | |
4645 | ||
4646 | /* Doubly-linked list of mmap'd regions. */ | |
4647 | ||
4648 | static struct mmap_region *mmap_regions; | |
4649 | ||
4650 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4651 | /dev/zero will be opened on it. */ | |
4652 | ||
4653 | static int mmap_fd; | |
4654 | ||
4655 | /* Temporary storage for mmap_set_vars, see there. */ | |
4656 | ||
4657 | static struct mmap_region *mmap_regions_1; | |
4658 | static int mmap_fd_1; | |
4659 | ||
4660 | /* Page size on this system. */ | |
4661 | ||
4662 | static int mmap_page_size; | |
4663 | ||
cd1181db | 4664 | /* 1 means mmap has been initialized. */ |
b86af064 | 4665 | |
37ef52bb | 4666 | static bool mmap_initialized_p; |
b86af064 GM |
4667 | |
4668 | /* Value is X rounded up to the next multiple of N. */ | |
4669 | ||
4670 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4671 | ||
4672 | /* Size of mmap_region structure plus padding. */ | |
4673 | ||
4674 | #define MMAP_REGION_STRUCT_SIZE \ | |
4675 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4676 | ||
4677 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4678 | region, return a pointer to the start of the region. */ | |
4679 | ||
4680 | #define MMAP_REGION(P) \ | |
4681 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4682 | ||
4683 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4684 | to the start of the user-visible part of the region. */ | |
4685 | ||
4686 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4687 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4688 | |
4689 | #define MEM_ALIGN sizeof (double) | |
4690 | ||
7273faa1 DL |
4691 | /* Predicate returning true if part of the address range [START .. END] |
4692 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4693 | memory mapping. |
4694 | ||
da6062e6 | 4695 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4696 | something else. This can be overridden by system configuration |
4697 | files if system-specific means to determine this exists. */ | |
4698 | ||
4699 | #ifndef MMAP_ALLOCATED_P | |
4700 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4701 | #endif | |
4702 | ||
53964682 | 4703 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4704 | |
1dae0f0a AS |
4705 | static void |
4706 | mmap_init (void) | |
4707 | { | |
4708 | #if MAP_ANON == 0 | |
4709 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4710 | in a dumped Emacs. */ | |
4711 | if (mmap_fd <= 0) | |
4712 | { | |
4713 | /* No anonymous mmap -- we need the file descriptor. */ | |
4714 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4715 | if (mmap_fd == -1) | |
4716 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4717 | } | |
4718 | #endif /* MAP_ANON == 0 */ | |
4719 | ||
4720 | if (mmap_initialized_p) | |
4721 | return; | |
4722 | mmap_initialized_p = 1; | |
b86af064 | 4723 | |
1dae0f0a AS |
4724 | #if MAP_ANON != 0 |
4725 | mmap_fd = -1; | |
4726 | #endif | |
4727 | ||
4728 | mmap_page_size = getpagesize (); | |
4729 | } | |
b86af064 GM |
4730 | |
4731 | /* Return a region overlapping address range START...END, or null if | |
4732 | none. END is not including, i.e. the last byte in the range | |
4733 | is at END - 1. */ | |
4734 | ||
4735 | static struct mmap_region * | |
261cb4bb | 4736 | mmap_find (void *start, void *end) |
b86af064 GM |
4737 | { |
4738 | struct mmap_region *r; | |
4739 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4740 | |
b86af064 GM |
4741 | for (r = mmap_regions; r; r = r->next) |
4742 | { | |
4743 | char *rstart = (char *) r; | |
4744 | char *rend = rstart + r->nbytes_mapped; | |
4745 | ||
4746 | if (/* First byte of range, i.e. START, in this region? */ | |
4747 | (s >= rstart && s < rend) | |
4748 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4749 | || (e > rstart && e <= rend) | |
4750 | /* First byte of this region in the range? */ | |
4751 | || (rstart >= s && rstart < e) | |
4752 | /* Last byte of this region in the range? */ | |
4753 | || (rend > s && rend <= e)) | |
4754 | break; | |
4755 | } | |
4756 | ||
4757 | return r; | |
4758 | } | |
4759 | ||
4760 | ||
4761 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
37ef52bb | 4762 | the region. */ |
b86af064 | 4763 | |
37ef52bb | 4764 | static void |
1dae0f0a | 4765 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4766 | { |
4767 | if (r->next) | |
4768 | r->next->prev = r->prev; | |
4769 | if (r->prev) | |
4770 | r->prev->next = r->next; | |
4771 | else | |
4772 | mmap_regions = r->next; | |
177c0ea7 | 4773 | |
261cb4bb | 4774 | if (munmap (r, r->nbytes_mapped) == -1) |
37ef52bb | 4775 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); |
b86af064 GM |
4776 | } |
4777 | ||
4778 | ||
4779 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
37ef52bb | 4780 | Value is true if successful. */ |
b86af064 | 4781 | |
37ef52bb | 4782 | static bool |
1dae0f0a | 4783 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4784 | { |
4785 | char *region_end = (char *) r + r->nbytes_mapped; | |
4786 | size_t nbytes; | |
37ef52bb | 4787 | bool success = 0; |
b86af064 GM |
4788 | |
4789 | if (npages < 0) | |
4790 | { | |
4791 | /* Unmap pages at the end of the region. */ | |
4792 | nbytes = - npages * mmap_page_size; | |
4793 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4794 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4795 | else | |
4796 | { | |
4797 | r->nbytes_mapped -= nbytes; | |
4798 | success = 1; | |
4799 | } | |
4800 | } | |
4801 | else if (npages > 0) | |
4802 | { | |
b86af064 | 4803 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4804 | |
b86af064 GM |
4805 | /* Try to map additional pages at the end of the region. We |
4806 | cannot do this if the address range is already occupied by | |
4807 | something else because mmap deletes any previous mapping. | |
4808 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4809 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4810 | { |
261cb4bb | 4811 | void *p; |
177c0ea7 | 4812 | |
b86af064 GM |
4813 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4814 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4815 | if (p == MAP_FAILED) | |
edaa9aed | 4816 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4817 | else if (p != region_end) |
b86af064 GM |
4818 | { |
4819 | /* Kernels are free to choose a different address. In | |
4820 | that case, unmap what we've mapped above; we have | |
4821 | no use for it. */ | |
4822 | if (munmap (p, nbytes) == -1) | |
4823 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4824 | } | |
4825 | else | |
4826 | { | |
4827 | r->nbytes_mapped += nbytes; | |
4828 | success = 1; | |
4829 | } | |
4830 | } | |
4831 | } | |
4832 | ||
4833 | return success; | |
4834 | } | |
4835 | ||
4836 | ||
37ef52bb PE |
4837 | /* Set or reset variables holding references to mapped regions. |
4838 | If not RESTORE_P, set all variables to null. If RESTORE_P, set all | |
4839 | variables to the start of the user-areas of mapped regions. | |
b86af064 GM |
4840 | |
4841 | This function is called from Fdump_emacs to ensure that the dumped | |
4842 | Emacs doesn't contain references to memory that won't be mapped | |
4843 | when Emacs starts. */ | |
4844 | ||
4845 | void | |
37ef52bb | 4846 | mmap_set_vars (bool restore_p) |
b86af064 GM |
4847 | { |
4848 | struct mmap_region *r; | |
4849 | ||
4850 | if (restore_p) | |
4851 | { | |
4852 | mmap_regions = mmap_regions_1; | |
4853 | mmap_fd = mmap_fd_1; | |
4854 | for (r = mmap_regions; r; r = r->next) | |
4855 | *r->var = MMAP_USER_AREA (r); | |
4856 | } | |
4857 | else | |
4858 | { | |
4859 | for (r = mmap_regions; r; r = r->next) | |
4860 | *r->var = NULL; | |
4861 | mmap_regions_1 = mmap_regions; | |
4862 | mmap_regions = NULL; | |
4863 | mmap_fd_1 = mmap_fd; | |
4864 | mmap_fd = -1; | |
4865 | } | |
4866 | } | |
4867 | ||
4868 | ||
4869 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4870 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4871 | address of some variable which will use the data area. | |
4872 | ||
4873 | The allocation of 0 bytes is valid. | |
4874 | ||
4875 | If we can't allocate the necessary memory, set *VAR to null, and | |
4876 | return null. */ | |
4877 | ||
261cb4bb PE |
4878 | static void * |
4879 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4880 | { |
4881 | void *p; | |
4882 | size_t map; | |
4883 | ||
4884 | mmap_init (); | |
4885 | ||
4886 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4887 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4888 | mmap_fd, 0); | |
177c0ea7 | 4889 | |
b86af064 GM |
4890 | if (p == MAP_FAILED) |
4891 | { | |
4892 | if (errno != ENOMEM) | |
4893 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4894 | p = NULL; | |
4895 | } | |
4896 | else | |
4897 | { | |
4898 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4899 | |
b86af064 GM |
4900 | r->nbytes_specified = nbytes; |
4901 | r->nbytes_mapped = map; | |
4902 | r->var = var; | |
4903 | r->prev = NULL; | |
4904 | r->next = mmap_regions; | |
4905 | if (r->next) | |
4906 | r->next->prev = r; | |
4907 | mmap_regions = r; | |
177c0ea7 | 4908 | |
b86af064 GM |
4909 | p = MMAP_USER_AREA (p); |
4910 | } | |
177c0ea7 | 4911 | |
b86af064 GM |
4912 | return *var = p; |
4913 | } | |
4914 | ||
4915 | ||
1dae0f0a AS |
4916 | /* Free a block of relocatable storage whose data is pointed to by |
4917 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4918 | ||
4919 | static void | |
261cb4bb | 4920 | mmap_free (void **var) |
1dae0f0a AS |
4921 | { |
4922 | mmap_init (); | |
4923 | ||
4924 | if (*var) | |
4925 | { | |
4926 | mmap_free_1 (MMAP_REGION (*var)); | |
4927 | *var = NULL; | |
4928 | } | |
4929 | } | |
4930 | ||
4931 | ||
b86af064 GM |
4932 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4933 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4934 | and return this value. If more memory cannot be allocated, then | |
4935 | leave *VAR unchanged, and return null. */ | |
4936 | ||
261cb4bb PE |
4937 | static void * |
4938 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4939 | { |
261cb4bb | 4940 | void *result; |
177c0ea7 | 4941 | |
b86af064 GM |
4942 | mmap_init (); |
4943 | ||
4944 | if (*var == NULL) | |
4945 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4946 | else if (nbytes == 0) |
b86af064 GM |
4947 | { |
4948 | mmap_free (var); | |
4949 | result = mmap_alloc (var, nbytes); | |
4950 | } | |
4951 | else | |
4952 | { | |
4953 | struct mmap_region *r = MMAP_REGION (*var); | |
4954 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4955 | |
b86af064 GM |
4956 | if (room < nbytes) |
4957 | { | |
4958 | /* Must enlarge. */ | |
261cb4bb | 4959 | void *old_ptr = *var; |
b86af064 GM |
4960 | |
4961 | /* Try to map additional pages at the end of the region. | |
4962 | If that fails, allocate a new region, copy data | |
4963 | from the old region, then free it. */ | |
4964 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4965 | / mmap_page_size))) | |
4966 | { | |
4967 | r->nbytes_specified = nbytes; | |
4968 | *var = result = old_ptr; | |
4969 | } | |
4970 | else if (mmap_alloc (var, nbytes)) | |
4971 | { | |
72af86bd | 4972 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4973 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4974 | result = *var; | |
4975 | r = MMAP_REGION (result); | |
4976 | r->nbytes_specified = nbytes; | |
4977 | } | |
4978 | else | |
4979 | { | |
4980 | *var = old_ptr; | |
4981 | result = NULL; | |
4982 | } | |
4983 | } | |
4984 | else if (room - nbytes >= mmap_page_size) | |
4985 | { | |
4986 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4987 | memory back to the system. |
4988 | ||
4989 | The extra parens are to make the division happens first, | |
4990 | on positive values, so we know it will round towards | |
4991 | zero. */ | |
bb63c5c9 | 4992 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4993 | result = *var; |
4994 | r->nbytes_specified = nbytes; | |
4995 | } | |
4996 | else | |
4997 | { | |
4998 | /* Leave it alone. */ | |
4999 | result = *var; | |
5000 | r->nbytes_specified = nbytes; | |
5001 | } | |
5002 | } | |
5003 | ||
5004 | return result; | |
5005 | } | |
5006 | ||
5007 | ||
b86af064 GM |
5008 | #endif /* USE_MMAP_FOR_BUFFERS */ |
5009 | ||
5010 | ||
5011 | \f | |
5012 | /*********************************************************************** | |
5013 | Buffer-text Allocation | |
5014 | ***********************************************************************/ | |
5015 | ||
b86af064 GM |
5016 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
5017 | ||
5018 | static void | |
fd05c7e9 | 5019 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 5020 | { |
261cb4bb | 5021 | void *p; |
177c0ea7 | 5022 | |
4d7e6e51 | 5023 | block_input (); |
b86af064 | 5024 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5025 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5026 | #elif defined REL_ALLOC |
261cb4bb | 5027 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5028 | #else |
815add84 | 5029 | p = xmalloc (nbytes); |
b86af064 | 5030 | #endif |
177c0ea7 | 5031 | |
b86af064 GM |
5032 | if (p == NULL) |
5033 | { | |
4d7e6e51 | 5034 | unblock_input (); |
531b0165 | 5035 | memory_full (nbytes); |
b86af064 GM |
5036 | } |
5037 | ||
5038 | b->text->beg = (unsigned char *) p; | |
4d7e6e51 | 5039 | unblock_input (); |
b86af064 GM |
5040 | } |
5041 | ||
5042 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5043 | shrink it. */ | |
5044 | ||
5045 | void | |
d311d28c | 5046 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 5047 | { |
261cb4bb | 5048 | void *p; |
fd05c7e9 PE |
5049 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
5050 | + delta); | |
4d7e6e51 | 5051 | block_input (); |
b86af064 | 5052 | #if defined USE_MMAP_FOR_BUFFERS |
261cb4bb | 5053 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5054 | #elif defined REL_ALLOC |
261cb4bb | 5055 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
5056 | #else |
5057 | p = xrealloc (b->text->beg, nbytes); | |
5058 | #endif | |
177c0ea7 | 5059 | |
b86af064 GM |
5060 | if (p == NULL) |
5061 | { | |
4d7e6e51 | 5062 | unblock_input (); |
531b0165 | 5063 | memory_full (nbytes); |
b86af064 GM |
5064 | } |
5065 | ||
5066 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4d7e6e51 | 5067 | unblock_input (); |
b86af064 GM |
5068 | } |
5069 | ||
5070 | ||
5071 | /* Free buffer B's text buffer. */ | |
5072 | ||
5073 | static void | |
d3da34e0 | 5074 | free_buffer_text (struct buffer *b) |
b86af064 | 5075 | { |
4d7e6e51 | 5076 | block_input (); |
b86af064 GM |
5077 | |
5078 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5079 | mmap_free ((void **) &b->text->beg); |
b86af064 | 5080 | #elif defined REL_ALLOC |
261cb4bb | 5081 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
5082 | #else |
5083 | xfree (b->text->beg); | |
5084 | #endif | |
177c0ea7 | 5085 | |
b86af064 | 5086 | BUF_BEG_ADDR (b) = NULL; |
4d7e6e51 | 5087 | unblock_input (); |
b86af064 GM |
5088 | } |
5089 | ||
5090 | ||
5091 | \f | |
5092 | /*********************************************************************** | |
5093 | Initialization | |
5094 | ***********************************************************************/ | |
5095 | ||
dfcf069d | 5096 | void |
d3da34e0 | 5097 | init_buffer_once (void) |
1ab256cb | 5098 | { |
7c02e886 GM |
5099 | int idx; |
5100 | ||
72af86bd | 5101 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5102 | |
1ab256cb RM |
5103 | /* Make sure all markable slots in buffer_defaults |
5104 | are initialized reasonably, so mark_buffer won't choke. */ | |
5105 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 5106 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 5107 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 5108 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 5109 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5110 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5111 | /* Prevent GC from getting confused. */ |
5112 | buffer_defaults.text = &buffer_defaults.own_text; | |
5113 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
5114 | /* No one will share the text with these buffers, but let's play it safe. */ |
5115 | buffer_defaults.indirections = 0; | |
5116 | buffer_local_symbols.indirections = 0; | |
98a07056 DA |
5117 | /* Likewise no one will display them. */ |
5118 | buffer_defaults.window_count = 0; | |
5119 | buffer_local_symbols.window_count = 0; | |
0c94c8d6 PE |
5120 | set_buffer_intervals (&buffer_defaults, NULL); |
5121 | set_buffer_intervals (&buffer_local_symbols, NULL); | |
c752cfa9 DA |
5122 | /* This is not strictly necessary, but let's make them initialized. */ |
5123 | bset_name (&buffer_defaults, build_pure_c_string (" *buffer-defaults*")); | |
5124 | bset_name (&buffer_local_symbols, build_pure_c_string (" *buffer-local-symbols*")); | |
914adc42 DA |
5125 | BUFFER_PVEC_INIT (&buffer_defaults); |
5126 | BUFFER_PVEC_INIT (&buffer_local_symbols); | |
1ab256cb RM |
5127 | |
5128 | /* Set up the default values of various buffer slots. */ | |
5129 | /* Must do these before making the first buffer! */ | |
5130 | ||
f532dca0 | 5131 | /* real setup is done in bindings.el */ |
39eb03f1 PE |
5132 | bset_mode_line_format (&buffer_defaults, build_pure_c_string ("%-")); |
5133 | bset_header_line_format (&buffer_defaults, Qnil); | |
5134 | bset_abbrev_mode (&buffer_defaults, Qnil); | |
5135 | bset_overwrite_mode (&buffer_defaults, Qnil); | |
5136 | bset_case_fold_search (&buffer_defaults, Qt); | |
5137 | bset_auto_fill_function (&buffer_defaults, Qnil); | |
5138 | bset_selective_display (&buffer_defaults, Qnil); | |
5139 | bset_selective_display_ellipses (&buffer_defaults, Qt); | |
5140 | bset_abbrev_table (&buffer_defaults, Qnil); | |
5141 | bset_display_table (&buffer_defaults, Qnil); | |
5142 | bset_undo_list (&buffer_defaults, Qnil); | |
5143 | bset_mark_active (&buffer_defaults, Qnil); | |
5144 | bset_file_format (&buffer_defaults, Qnil); | |
5145 | bset_auto_save_file_format (&buffer_defaults, Qt); | |
0c94c8d6 PE |
5146 | set_buffer_overlays_before (&buffer_defaults, NULL); |
5147 | set_buffer_overlays_after (&buffer_defaults, NULL); | |
c2d5b10f | 5148 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5149 | |
4b4deea2 | 5150 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
39eb03f1 PE |
5151 | bset_truncate_lines (&buffer_defaults, Qnil); |
5152 | bset_word_wrap (&buffer_defaults, Qnil); | |
5153 | bset_ctl_arrow (&buffer_defaults, Qt); | |
5154 | bset_bidi_display_reordering (&buffer_defaults, Qt); | |
5155 | bset_bidi_paragraph_direction (&buffer_defaults, Qnil); | |
5156 | bset_cursor_type (&buffer_defaults, Qt); | |
5157 | bset_extra_line_spacing (&buffer_defaults, Qnil); | |
5158 | bset_cursor_in_non_selected_windows (&buffer_defaults, Qt); | |
5159 | ||
5160 | bset_enable_multibyte_characters (&buffer_defaults, Qt); | |
5161 | bset_buffer_file_coding_system (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5162 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
5163 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
39eb03f1 PE |
5164 | bset_cache_long_line_scans (&buffer_defaults, Qnil); |
5165 | bset_file_truename (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5166 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
5167 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5168 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
39eb03f1 PE |
5169 | bset_left_fringe_width (&buffer_defaults, Qnil); |
5170 | bset_right_fringe_width (&buffer_defaults, Qnil); | |
5171 | bset_fringes_outside_margins (&buffer_defaults, Qnil); | |
5172 | bset_scroll_bar_width (&buffer_defaults, Qnil); | |
5173 | bset_vertical_scroll_bar_type (&buffer_defaults, Qt); | |
5174 | bset_indicate_empty_lines (&buffer_defaults, Qnil); | |
5175 | bset_indicate_buffer_boundaries (&buffer_defaults, Qnil); | |
5176 | bset_fringe_indicator_alist (&buffer_defaults, Qnil); | |
5177 | bset_fringe_cursor_alist (&buffer_defaults, Qnil); | |
5178 | bset_scroll_up_aggressively (&buffer_defaults, Qnil); | |
5179 | bset_scroll_down_aggressively (&buffer_defaults, Qnil); | |
5180 | bset_display_time (&buffer_defaults, Qnil); | |
1ab256cb RM |
5181 | |
5182 | /* Assign the local-flags to the slots that have default values. | |
5183 | The local flag is a bit that is used in the buffer | |
5184 | to say that it has its own local value for the slot. | |
5185 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5186 | ||
5187 | /* Nothing can work if this isn't true */ | |
663e2b3f | 5188 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
5189 | |
5190 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5191 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
39eb03f1 PE |
5192 | bset_filename (&buffer_local_flags, make_number (-1)); |
5193 | bset_directory (&buffer_local_flags, make_number (-1)); | |
5194 | bset_backed_up (&buffer_local_flags, make_number (-1)); | |
5195 | bset_save_length (&buffer_local_flags, make_number (-1)); | |
5196 | bset_auto_save_file_name (&buffer_local_flags, make_number (-1)); | |
5197 | bset_read_only (&buffer_local_flags, make_number (-1)); | |
5198 | bset_major_mode (&buffer_local_flags, make_number (-1)); | |
5199 | bset_mode_name (&buffer_local_flags, make_number (-1)); | |
5200 | bset_undo_list (&buffer_local_flags, make_number (-1)); | |
5201 | bset_mark_active (&buffer_local_flags, make_number (-1)); | |
5202 | bset_point_before_scroll (&buffer_local_flags, make_number (-1)); | |
5203 | bset_file_truename (&buffer_local_flags, make_number (-1)); | |
5204 | bset_invisibility_spec (&buffer_local_flags, make_number (-1)); | |
5205 | bset_file_format (&buffer_local_flags, make_number (-1)); | |
5206 | bset_auto_save_file_format (&buffer_local_flags, make_number (-1)); | |
5207 | bset_display_count (&buffer_local_flags, make_number (-1)); | |
5208 | bset_display_time (&buffer_local_flags, make_number (-1)); | |
5209 | bset_enable_multibyte_characters (&buffer_local_flags, make_number (-1)); | |
8d7a4592 | 5210 | |
7c02e886 | 5211 | idx = 1; |
4b4deea2 TT |
5212 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5213 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5214 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5215 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5216 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5217 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5218 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5219 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5220 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5221 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5222 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5223 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5224 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5225 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5226 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5227 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5228 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5229 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5230 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5231 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5232 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5233 | /* Make this one a permanent local. */ |
7c02e886 | 5234 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5235 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5236 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5237 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5238 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5239 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5240 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5241 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5242 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5243 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5244 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5245 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5246 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5247 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5248 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5249 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5250 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5251 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5252 | |
5253 | /* Need more room? */ | |
7313acd0 | 5254 | if (idx >= MAX_PER_BUFFER_VARS) |
1088b922 | 5255 | emacs_abort (); |
7313acd0 | 5256 | last_per_buffer_idx = idx; |
177c0ea7 | 5257 | |
1ab256cb RM |
5258 | Vbuffer_alist = Qnil; |
5259 | current_buffer = 0; | |
5260 | all_buffers = 0; | |
5261 | ||
2a0213a6 | 5262 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5263 | |
d67b4f80 | 5264 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
39eb03f1 | 5265 | bset_major_mode (&buffer_defaults, Qfundamental_mode); |
1ab256cb | 5266 | |
d67b4f80 | 5267 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5268 | |
d67b4f80 | 5269 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5270 | |
d67b4f80 | 5271 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5272 | |
d67b4f80 | 5273 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5274 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5275 | |
1ab256cb | 5276 | /* super-magic invisible buffer */ |
2a0213a6 | 5277 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5278 | Vbuffer_alist = Qnil; |
5279 | ||
2a0213a6 | 5280 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5281 | |
5282 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5283 | } |
5284 | ||
dfcf069d | 5285 | void |
d3da34e0 | 5286 | init_buffer (void) |
1ab256cb | 5287 | { |
2381d133 | 5288 | char *pwd; |
136351b7 | 5289 | Lisp_Object temp; |
965d34eb | 5290 | ptrdiff_t len; |
1ab256cb | 5291 | |
b86af064 | 5292 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5293 | { |
5294 | /* When using the ralloc implementation based on mmap(2), buffer | |
5295 | text pointers will have been set to null in the dumped Emacs. | |
5296 | Map new memory. */ | |
5297 | struct buffer *b; | |
177c0ea7 | 5298 | |
52b852c7 | 5299 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5300 | if (b->text->beg == NULL) |
b86af064 | 5301 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5302 | } |
b86af064 | 5303 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5304 | |
1ab256cb | 5305 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5306 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5307 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5308 | |
01537133 | 5309 | pwd = get_current_dir_name (); |
a17b5ed1 | 5310 | |
156bdb41 | 5311 | if (!pwd) |
a17b5ed1 | 5312 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5313 | |
1ab256cb RM |
5314 | /* Maybe this should really use some standard subroutine |
5315 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5316 | len = strlen (pwd); |
5317 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5318 | { |
156bdb41 | 5319 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5320 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5321 | if (!pwd) |
5322 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5323 | pwd[len] = DIRECTORY_SEP; |
5324 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5325 | len++; |
f7975d07 | 5326 | } |
0995fa35 | 5327 | |
39eb03f1 | 5328 | bset_directory (current_buffer, make_unibyte_string (pwd, len)); |
4b4deea2 | 5329 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5330 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5331 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5332 | that ENCODE_FILE correctly gets the original bytes. */ |
39eb03f1 PE |
5333 | bset_directory |
5334 | (current_buffer, string_to_multibyte (BVAR (current_buffer, directory))); | |
136351b7 | 5335 | |
0995fa35 RS |
5336 | /* Add /: to the front of the name |
5337 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5338 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5339 | if (! NILP (temp) |
5340 | /* If the default dir is just /, TEMP is non-nil | |
5341 | because of the ange-ftp completion handler. | |
5342 | However, it is not necessary to turn / into /:/. | |
5343 | So avoid doing that. */ | |
4b4deea2 | 5344 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
39eb03f1 PE |
5345 | bset_directory |
5346 | (current_buffer, | |
5347 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5348 | |
136351b7 | 5349 | temp = get_minibuffer (0); |
39eb03f1 | 5350 | bset_directory (XBUFFER (temp), BVAR (current_buffer, directory)); |
01537133 EZ |
5351 | |
5352 | free (pwd); | |
1ab256cb RM |
5353 | } |
5354 | ||
58cc0a01 DA |
5355 | /* Similar to defvar_lisp but define a variable whose value is the |
5356 | Lisp_Object stored in the current buffer. LNAME is the Lisp-level | |
5357 | variable name. VNAME is the name of the buffer slot. PREDICATE | |
5358 | is nil for a general Lisp variable. If PREDICATE is non-nil, then | |
5359 | only Lisp values that satisfies the PREDICATE are allowed (except | |
5360 | that nil is allowed too). DOC is a dummy where you write the doc | |
5361 | string as a comment. */ | |
5362 | ||
5363 | #define DEFVAR_PER_BUFFER(lname, vname, predicate, doc) \ | |
5364 | do { \ | |
5365 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5366 | defvar_per_buffer (&bo_fwd, lname, vname, predicate); \ | |
ce5b453a | 5367 | } while (0) |
d6aa1876 SM |
5368 | |
5369 | static void | |
8ea90aa3 | 5370 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
58cc0a01 | 5371 | Lisp_Object *address, Lisp_Object predicate) |
d6aa1876 | 5372 | { |
ce5b453a | 5373 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5374 | int offset; |
5375 | ||
ce5b453a | 5376 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5377 | offset = (char *)address - (char *)current_buffer; |
5378 | ||
ce5b453a SM |
5379 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5380 | bo_fwd->offset = offset; | |
58cc0a01 | 5381 | bo_fwd->predicate = predicate; |
b9598260 | 5382 | sym->declared_special = 1; |
ce5b453a SM |
5383 | sym->redirect = SYMBOL_FORWARDED; |
5384 | { | |
5385 | /* I tried to do the job without a cast, but it seems impossible. | |
5386 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5387 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5388 | } | |
5389 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5390 | |
5391 | if (PER_BUFFER_IDX (offset) == 0) | |
5392 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5393 | slot of buffer_local_flags */ | |
1088b922 | 5394 | emacs_abort (); |
d6aa1876 SM |
5395 | } |
5396 | ||
5397 | ||
1ab256cb | 5398 | /* initialize the buffer routines */ |
dfcf069d | 5399 | void |
d3da34e0 | 5400 | syms_of_buffer (void) |
1ab256cb | 5401 | { |
9115729e KH |
5402 | staticpro (&last_overlay_modification_hooks); |
5403 | last_overlay_modification_hooks | |
5404 | = Fmake_vector (make_number (10), Qnil); | |
5405 | ||
1ab256cb RM |
5406 | staticpro (&Qfundamental_mode); |
5407 | staticpro (&Qmode_class); | |
5408 | staticpro (&QSFundamental); | |
5409 | staticpro (&Vbuffer_alist); | |
5410 | staticpro (&Qprotected_field); | |
5411 | staticpro (&Qpermanent_local); | |
5412 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5413 | |
5414 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5415 | DEFSYM (Qoverlayp, "overlayp"); | |
5416 | DEFSYM (Qevaporate, "evaporate"); | |
5417 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5418 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5419 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5420 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5421 | DEFSYM (Qpriority, "priority"); | |
5422 | DEFSYM (Qbefore_string, "before-string"); | |
5423 | DEFSYM (Qafter_string, "after-string"); | |
5424 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5425 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5426 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5427 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5428 | ||
1ab256cb | 5429 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5430 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5431 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5432 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5433 | |
422745d0 TT |
5434 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5435 | mode_line_format, | |
5436 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5437 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5438 | |
422745d0 TT |
5439 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5440 | header_line_format, | |
5441 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5442 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5443 | |
422745d0 TT |
5444 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5445 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5446 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5447 | |
422745d0 TT |
5448 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5449 | extra_line_spacing, | |
5450 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5451 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5452 | |
422745d0 TT |
5453 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5454 | cursor_in_non_selected_windows, | |
5455 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5456 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5457 | ||
422745d0 TT |
5458 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5459 | abbrev_mode, | |
5460 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5461 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5462 | |
422745d0 TT |
5463 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5464 | ctl_arrow, | |
5465 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5466 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5467 | |
422745d0 TT |
5468 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5469 | enable_multibyte_characters, | |
fb7ada5f | 5470 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5471 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5472 | |
422745d0 TT |
5473 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5474 | buffer_file_coding_system, | |
5475 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5476 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5477 | |
422745d0 TT |
5478 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5479 | truncate_lines, | |
5480 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5481 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5482 | |
422745d0 TT |
5483 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5484 | fill_column, | |
5485 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5486 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5487 | |
422745d0 TT |
5488 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5489 | left_margin, | |
5490 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5491 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5492 | |
422745d0 TT |
5493 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5494 | tab_width, | |
5495 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5496 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5497 | |
422745d0 TT |
5498 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5499 | case_fold_search, | |
5500 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5501 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5502 | |
422745d0 TT |
5503 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5504 | left_margin_cols, | |
5505 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5506 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5507 | |
422745d0 TT |
5508 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5509 | right_margin_cols, | |
5510 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5511 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5512 | |
422745d0 TT |
5513 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5514 | left_fringe_width, | |
5515 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5516 | This is the same as (default-value 'left-fringe-width). */); |
5517 | ||
422745d0 TT |
5518 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5519 | right_fringe_width, | |
5520 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5521 | This is the same as (default-value 'right-fringe-width). */); |
5522 | ||
422745d0 TT |
5523 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5524 | fringes_outside_margins, | |
5525 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5526 | This is the same as (default-value 'fringes-outside-margins). */); |
5527 | ||
422745d0 TT |
5528 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5529 | scroll_bar_width, | |
5530 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5531 | This is the same as (default-value 'scroll-bar-width). */); |
5532 | ||
422745d0 TT |
5533 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5534 | vertical_scroll_bar_type, | |
5535 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5536 | This is the same as (default-value 'vertical-scroll-bar). */); |
5537 | ||
422745d0 TT |
5538 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5539 | indicate_empty_lines, | |
5540 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5541 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5542 | |
422745d0 TT |
5543 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5544 | indicate_buffer_boundaries, | |
5545 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5546 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5547 | ||
422745d0 TT |
5548 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5549 | fringe_indicator_alist, | |
5550 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5551 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5552 | ||
422745d0 TT |
5553 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5554 | fringe_cursor_alist, | |
5555 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5556 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5557 | ||
422745d0 TT |
5558 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5559 | scroll_up_aggressively, | |
5560 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5561 | This value applies in buffers that don't have their own local values. |
fc961256 | 5562 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5563 | |
422745d0 TT |
5564 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5565 | scroll_down_aggressively, | |
5566 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5567 | This value applies in buffers that don't have their own local values. |
fc961256 | 5568 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5569 | |
045dee35 | 5570 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5571 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5572 | Qnil, |
7614d762 RS |
5573 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5574 | The header line appears, optionally, at the top of a window; | |
5575 | the mode line appears at the bottom. */); | |
177c0ea7 | 5576 | |
4b4deea2 | 5577 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5578 | Qnil, |
5579 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5580 | |
5581 | The value may be nil, a string, a symbol or a list. | |
5582 | ||
018ba359 | 5583 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5584 | |
5585 | For any symbol other than t or nil, the symbol's value is processed as | |
5586 | a mode line construct. As a special exception, if that value is a | |
5587 | string, the string is processed verbatim, without handling any | |
5588 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5589 | `risky-local-variable' property, all properties in any strings, as | |
5590 | well as all :eval and :propertize forms in the value, are ignored. | |
5591 | ||
5592 | A list whose car is a string or list is processed by processing each | |
5593 | of the list elements recursively, as separate mode line constructs, | |
5594 | and concatenating the results. | |
5595 | ||
5596 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5597 | using the result as a mode line construct. Be careful--FORM should | |
5598 | not load any files, because that can cause an infinite recursion. | |
5599 | ||
5600 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5601 | processing ELT as the mode line construct, and adding the text | |
5602 | properties PROPS to the result. | |
5603 | ||
5604 | A list whose car is a symbol is processed by examining the symbol's | |
5605 | value, and, if that value is non-nil, processing the cadr of the list | |
5606 | recursively; and if that value is nil, processing the caddr of the | |
5607 | list recursively. | |
5608 | ||
5609 | A list whose car is an integer is processed by processing the cadr of | |
5610 | the list, and padding (if the number is positive) or truncating (if | |
5611 | negative) to the width specified by that number. | |
5612 | ||
018ba359 | 5613 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5614 | %b -- print buffer name. %f -- print visited file name. |
5615 | %F -- print frame name. | |
5616 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5617 | %& is like %*, but ignore read-only-ness. | |
5618 | % means buffer is read-only and * means it is modified. | |
5619 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5620 | %s -- print process status. %l -- print the current line number. | |
5621 | %c -- print the current column number (this makes editing slower). | |
5622 | To make the column number update correctly in all cases, | |
5623 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5624 | %i -- print the size of the buffer. |
5625 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5626 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5627 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5628 | or print Bottom or All. | |
018ba359 | 5629 | %n -- print Narrow if appropriate. |
dafbe726 | 5630 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5631 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5632 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5633 | %e -- print error message about full memory. |
f7165034 NR |
5634 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5635 | remote machine. | |
018ba359 PJ |
5636 | %[ -- print one [ for each recursive editing level. %] similar. |
5637 | %% -- print %. %- -- print infinitely many dashes. | |
5638 | Decimal digits after the % specify field width to which to pad. */); | |
5639 | ||
422745d0 | 5640 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5641 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5642 | |
4b4deea2 | 5643 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
58cc0a01 | 5644 | Qsymbolp, |
5a021dd0 GM |
5645 | doc: /* Symbol for current buffer's major mode. |
5646 | The default value (normally `fundamental-mode') affects new buffers. | |
5647 | A value of nil means to use the current buffer's major mode, provided | |
5648 | it is not marked as "special". | |
5649 | ||
5650 | When a mode is used by default, `find-file' switches to it before it | |
5651 | reads the contents into the buffer and before it finishes setting up | |
5652 | the buffer. Thus, the mode and its hooks should not expect certain | |
5653 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5654 | to be set up. */); | |
1ab256cb | 5655 | |
4b4deea2 | 5656 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5657 | Qnil, |
64a7c220 | 5658 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5659 | Usually a string, but can use any of the constructs for `mode-line-format', |
5660 | which see. | |
5661 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5662 | |
4b4deea2 | 5663 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5664 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5665 | ||
4b4deea2 | 5666 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5667 | doc: /* Non-nil if Abbrev mode is enabled. |
5668 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5669 | |
4b4deea2 | 5670 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5671 | Qnil, |
fb7ada5f | 5672 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5673 | |
4b4deea2 | 5674 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
58cc0a01 | 5675 | Qintegerp, |
fb7ada5f | 5676 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5677 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5678 | |
4b4deea2 | 5679 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
58cc0a01 | 5680 | Qintegerp, |
fb7ada5f | 5681 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5682 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5683 | |
4b4deea2 | 5684 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
58cc0a01 | 5685 | Qintegerp, |
fb7ada5f | 5686 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5687 | This should be an integer greater than zero. */); |
1ab256cb | 5688 | |
4b4deea2 | 5689 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5690 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5691 | A value of nil means use backslash and octal digits. |
5692 | This variable does not apply to characters whose display is specified | |
5693 | in the current display table (if there is one). */); | |
1ab256cb | 5694 | |
3b06f880 | 5695 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5696 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5697 | Qnil, |
efc7e75f | 5698 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5699 | Otherwise they are regarded as unibyte. This affects the display, |
5700 | file I/O and the behavior of various editing commands. | |
5701 | ||
5702 | This variable is buffer-local but you cannot set it directly; | |
5703 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5704 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5705 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5706 | |
c71b5d9b | 5707 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5708 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5709 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5710 | This variable applies to saving the buffer, and also to `write-region' |
5711 | and other functions that use `write-region'. | |
5712 | It does not apply to sending output to subprocesses, however. | |
5713 | ||
5714 | If this is nil, the buffer is saved without any code conversion | |
5715 | unless some coding system is specified in `file-coding-system-alist' | |
5716 | for the buffer file. | |
5717 | ||
31a6cb06 EZ |
5718 | If the text to be saved cannot be encoded as specified by this variable, |
5719 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5720 | ||
018ba359 PJ |
5721 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5722 | ||
5723 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5724 | |
f44e260c | 5725 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5726 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5727 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5728 | |
6c0cf218 | 5729 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5730 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5731 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5732 | |
b44d9321 EZ |
5733 | If this is nil (the default), the direction of each paragraph is |
5734 | determined by the first strong directional character of its text. | |
5735 | The values of `right-to-left' and `left-to-right' override that. | |
5736 | Any other value is treated as nil. | |
b4bf28b7 | 5737 | |
b44d9321 EZ |
5738 | This variable has no effect unless the buffer's value of |
5739 | \`bidi-display-reordering' is non-nil. */); | |
5740 | ||
4b4deea2 | 5741 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5742 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5743 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5744 | |
5745 | Note that this is overridden by the variable | |
5746 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5747 | and this buffer is not full-frame width. |
5748 | ||
5749 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5750 | |
4b4deea2 | 5751 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5752 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5753 | When word-wrapping is on, continuation lines are wrapped at the space |
5754 | or tab character nearest to the right window edge. | |
5755 | If nil, continuation lines are wrapped at the right screen edge. | |
5756 | ||
5757 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5758 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5759 | word-wrapping, you might want to reduce the value of | |
5760 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5761 | in narrower windows. |
5762 | ||
5763 | Instead of setting this variable directly, most users should use | |
5764 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5765 | to t, and additionally redefines simple editing commands to act on | |
5766 | visual lines rather than logical lines. See the documentation of | |
5767 | `visual-line-mode'. */); | |
0858cd02 | 5768 | |
4b4deea2 | 5769 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
58cc0a01 | 5770 | Qstringp, |
efc7e75f | 5771 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5772 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5773 | |
4b4deea2 | 5774 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5775 | Qnil, |
efc7e75f | 5776 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5777 | It is called after self-inserting any character specified in |
5778 | the `auto-fill-chars' table. | |
5779 | NOTE: This variable is not a hook; | |
5780 | its value may not be a list of functions. */); | |
1ab256cb | 5781 | |
4b4deea2 | 5782 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
58cc0a01 | 5783 | Qstringp, |
efc7e75f | 5784 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5785 | |
4b4deea2 | 5786 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
58cc0a01 | 5787 | Qstringp, |
efc7e75f | 5788 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5789 | The truename of a file is calculated by `file-truename' |
5790 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5791 | |
1ab256cb | 5792 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5793 | &BVAR (current_buffer, auto_save_file_name), |
58cc0a01 | 5794 | Qstringp, |
7614d762 RS |
5795 | doc: /* Name of file for auto-saving current buffer. |
5796 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5797 | |
4b4deea2 | 5798 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5799 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5800 | |
4b4deea2 | 5801 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5802 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5803 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5804 | |
4b4deea2 | 5805 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
58cc0a01 | 5806 | Qintegerp, |
efc7e75f | 5807 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5808 | 0 initially. |
5809 | -1 means auto-saving turned off until next real save. | |
5810 | ||
5811 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5812 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5813 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5814 | |
4b4deea2 | 5815 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5816 | Qnil, |
7614d762 | 5817 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5818 | An integer N as value means display only lines |
5819 | that start with less than N columns of space. | |
7614d762 RS |
5820 | A value of t means that the character ^M makes itself and |
5821 | all the rest of the line invisible; also, when saving the buffer | |
5822 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5823 | |
1ab256cb | 5824 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5825 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5826 | Qnil, |
3f676284 | 5827 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5828 | |
4b4deea2 | 5829 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5830 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5831 | The value should be one of `overwrite-mode-textual', |
5832 | `overwrite-mode-binary', or nil. | |
5833 | If it is `overwrite-mode-textual', self-insertion still | |
5834 | inserts at the end of a line, and inserts when point is before a tab, | |
5835 | until the tab is filled in. | |
5836 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5837 | ||
4b4deea2 | 5838 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5839 | Qnil, |
efc7e75f | 5840 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5841 | |
5842 | If this variable is nil, the value of `standard-display-table' is used. | |
5843 | Each window can have its own, overriding display table, see | |
5844 | `set-window-display-table' and `window-display-table'. | |
5845 | ||
5846 | The display table is a char-table created with `make-display-table'. | |
5847 | A char-table is an array indexed by character codes. Normal array | |
5848 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5849 | ||
5850 | Each of the char-table elements control how to display the corresponding | |
5851 | text character: the element at index C in the table says how to display | |
5852 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5853 | characters or nil. The value nil means display the character in the |
5854 | default fashion; otherwise, the characters from the vector are delivered | |
5855 | to the screen instead of the original character. | |
018ba359 | 5856 | |
5fd11dc8 | 5857 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5858 | to display a capital Y instead of each X character. |
018ba359 PJ |
5859 | |
5860 | In addition, a char-table has six extra slots to control the display of: | |
5861 | ||
5862 | the end of a truncated screen line (extra-slot 0, a single character); | |
5863 | the end of a continued line (extra-slot 1, a single character); | |
5864 | the escape character used to display character codes in octal | |
5865 | (extra-slot 2, a single character); | |
5866 | the character used as an arrow for control characters (extra-slot 3, | |
5867 | a single character); | |
5868 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5869 | a vector of characters); | |
5870 | the character used to draw the border between side-by-side windows | |
5871 | (extra-slot 5, a single character). | |
5872 | ||
5873 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5874 | |
4b4deea2 | 5875 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
58cc0a01 | 5876 | Qintegerp, |
fb7ada5f | 5877 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5878 | A value of nil means no marginal area. */); |
177c0ea7 | 5879 | |
4b4deea2 | 5880 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
58cc0a01 | 5881 | Qintegerp, |
fb7ada5f | 5882 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5883 | A value of nil means no marginal area. */); |
177c0ea7 | 5884 | |
4b4deea2 | 5885 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
58cc0a01 | 5886 | Qintegerp, |
fb7ada5f | 5887 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5888 | A value of 0 means no left fringe is shown in this buffer's window. |
5889 | A value of nil means to use the left fringe width from the window's frame. */); | |
5890 | ||
4b4deea2 | 5891 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
58cc0a01 | 5892 | Qintegerp, |
fb7ada5f | 5893 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5894 | A value of 0 means no right fringe is shown in this buffer's window. |
5895 | A value of nil means to use the right fringe width from the window's frame. */); | |
5896 | ||
4b4deea2 | 5897 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5898 | Qnil, |
fb7ada5f | 5899 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5900 | A value of nil means to display fringes between margins and buffer text. */); |
5901 | ||
4b4deea2 | 5902 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
58cc0a01 | 5903 | Qintegerp, |
fb7ada5f | 5904 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5905 | A value of nil means to use the scroll bar width from the window's frame. */); |
5906 | ||
4b4deea2 | 5907 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5908 | Qnil, |
fb7ada5f | 5909 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5910 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5911 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5912 | |
fc2c8887 RS |
5913 | A value of `left' or `right' means put the vertical scroll bar at that side |
5914 | of the window; a value of nil means don't show any vertical scroll bars. | |
5915 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5916 | |
0552666b | 5917 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5918 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5919 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5920 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5921 | window-systems. */); | |
177c0ea7 | 5922 | |
6b61353c | 5923 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5924 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5925 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5926 | If non-nil, the first and last line of the buffer are marked in the fringe |
5927 | of a window on window-systems with angle bitmaps, or if the window can be | |
5928 | scrolled, the top and bottom line of the window are marked with up and down | |
5929 | arrow bitmaps. | |
b2229037 KS |
5930 | |
5931 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5932 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5933 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5934 | the left fringe but no arrows. |
b2229037 | 5935 | |
79e3497d RS |
5936 | You can exercise more precise control by using an alist as the |
5937 | value. Each alist element (INDICATOR . POSITION) specifies | |
5938 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5939 | `bottom', `up', `down', or t, which specifies the default position, |
5940 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5941 | this indicator. | |
5942 | ||
5943 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5944 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5945 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5946 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5947 | |
c6a46372 | 5948 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5949 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5950 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5951 | The value is an alist where each element (INDICATOR . BITMAPS) |
5952 | specifies the fringe bitmaps used to display a specific logical | |
5953 | fringe indicator. | |
5954 | ||
5955 | INDICATOR specifies the logical indicator type which is one of the | |
5956 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5957 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5958 | |
14fb5704 | 5959 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5960 | the actual bitmap shown in the left or right fringe for the logical |
5961 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5962 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5963 | are used only for the `bottom' and `top-bottom' indicators when the |
5964 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5965 | symbol which is used in both left and right fringes. */); |
5966 | ||
5967 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5968 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5969 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5970 | The value is an alist where each element (CURSOR . BITMAP) |
5971 | specifies the fringe bitmaps used to display a specific logical | |
5972 | cursor type in the fringe. | |
5973 | ||
5974 | CURSOR specifies the logical cursor type which is one of the following | |
5975 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5976 | one is used to show a hollow cursor on narrow lines display lines | |
5977 | where the normal hollow cursor will not fit. | |
5978 | ||
5979 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5980 | cursor type. */); | |
5981 | ||
0552666b | 5982 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
58cc0a01 | 5983 | &BVAR (current_buffer, scroll_up_aggressively), Qfloatp, |
4e0692c1 RS |
5984 | doc: /* How far to scroll windows upward. |
5985 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5986 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5987 | means scroll to center point. A fraction means scroll to put point |
5988 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5989 | When the value is 0.0, point goes at the bottom line, which in the |
5990 | simple case that you moved off with C-f means scrolling just one line. | |
5991 | 1.0 means point goes at the top, so that in that simple case, the | |
5992 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5993 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5994 | |
0552666b | 5995 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
58cc0a01 | 5996 | &BVAR (current_buffer, scroll_down_aggressively), Qfloatp, |
4e0692c1 RS |
5997 | doc: /* How far to scroll windows downward. |
5998 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5999 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6000 | means scroll to center point. A fraction means scroll to put point |
6001 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6002 | When the value is 0.0, point goes at the top line, which in the |
6003 | simple case that you moved off with C-b means scrolling just one line. | |
6004 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6005 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6006 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6007 | |
29208e82 | 6008 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 6009 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
6010 | Two arguments are passed to each function: the positions of |
6011 | the beginning and end of the range of old text to be changed. | |
6012 | \(For an insertion, the beginning and end are at the same place.) | |
6013 | No information is given about the length of the text after the change. | |
6014 | ||
6015 | Buffer changes made while executing the `before-change-functions' | |
6016 | don't call any before-change or after-change functions. | |
7b2bf907 | 6017 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6018 | |
6019 | If an unhandled error happens in running these functions, | |
6020 | the variable's value remains nil. That prevents the error | |
6021 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6022 | Vbefore_change_functions = Qnil; |
6023 | ||
29208e82 | 6024 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 6025 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6026 | Three arguments are passed to each function: the positions of |
6027 | the beginning and end of the range of changed text, | |
6028 | and the length in bytes of the pre-change text replaced by that range. | |
6029 | \(For an insertion, the pre-change length is zero; | |
6030 | for a deletion, that length is the number of bytes deleted, | |
6031 | and the post-change beginning and end are at the same place.) | |
6032 | ||
6033 | Buffer changes made while executing the `after-change-functions' | |
6034 | don't call any before-change or after-change functions. | |
7b2bf907 | 6035 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6036 | |
6037 | If an unhandled error happens in running these functions, | |
6038 | the variable's value remains nil. That prevents the error | |
6039 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6040 | Vafter_change_functions = Qnil; |
6041 | ||
29208e82 | 6042 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 6043 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6044 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6045 | Vfirst_change_hook = Qnil; |
1ab256cb | 6046 | |
4b4deea2 | 6047 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 6048 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
6049 | Recent changes come first; older changes follow newer. |
6050 | ||
6051 | An entry (BEG . END) represents an insertion which begins at | |
6052 | position BEG and ends at position END. | |
6053 | ||
6054 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6055 | from (abs POSITION). If POSITION is positive, point was at the front | |
6056 | of the text being deleted; if negative, point was at the end. | |
6057 | ||
d35af63c PE |
6058 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
6059 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
6060 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
6061 | modification time of the most recent save is different, this entry is |
6062 | obsolete. | |
6063 | ||
6064 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6065 | was modified between BEG and END. PROPERTY is the property name, | |
6066 | and VALUE is the old value. | |
6067 | ||
7405f386 KS |
6068 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6069 | \(apply FUN-NAME ARGS). | |
6070 | ||
6071 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6072 | in the active region. BEG and END is the range affected by this entry | |
6073 | and DELTA is the number of bytes added or deleted in that range by | |
6074 | this change. | |
c6c7dc03 | 6075 | |
018ba359 PJ |
6076 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6077 | was adjusted in position by the offset DISTANCE (an integer). | |
6078 | ||
6079 | An entry of the form POSITION indicates that point was at the buffer | |
6080 | location given by the integer. Undoing an entry of this form places | |
6081 | point at POSITION. | |
6082 | ||
b4c4f2f4 JB |
6083 | Entries with value `nil' mark undo boundaries. The undo command treats |
6084 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6085 | |
6086 | If the value of the variable is t, undo information is not recorded. */); | |
6087 | ||
4b4deea2 | 6088 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 6089 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 6090 | |
4b4deea2 | 6091 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 6092 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
6093 | |
6094 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6095 | newlines. Columnar operations (like `move-to-column' and |
6096 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6097 | widths as they go. This works well for ordinary text, but if the |
6098 | buffer's lines are very long (say, more than 500 characters), these | |
6099 | motion functions will take longer to execute. Emacs may also take | |
6100 | longer to update the display. | |
6101 | ||
5629f29b | 6102 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6103 | results of their scans, and consult the cache to avoid rescanning |
6104 | regions of the buffer until the text is modified. The caches are most | |
6105 | beneficial when they prevent the most searching---that is, when the | |
6106 | buffer contains long lines and large regions of characters with the | |
6107 | same, fixed screen width. | |
6108 | ||
5629f29b | 6109 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6110 | become slightly slower (because of the overhead of consulting the |
6111 | cache), and the caches will use memory roughly proportional to the | |
6112 | number of newlines and characters whose screen width varies. | |
6113 | ||
6114 | The caches require no explicit maintenance; their accuracy is | |
6115 | maintained internally by the Emacs primitives. Enabling or disabling | |
6116 | the cache should not affect the behavior of any of the motion | |
6117 | functions; it should only affect their performance. */); | |
6118 | ||
4b4deea2 | 6119 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6120 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6121 | |
4b4deea2 | 6122 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6123 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6124 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6125 | set when a file is visited. */); |
be9aafdd | 6126 | |
71ed49fa | 6127 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6128 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 6129 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
6130 | Should be a list of symbols naming formats that are defined in `format-alist'. |
6131 | If it is t, which is the default, auto-save files are written in the | |
6132 | same format as a regular save would use. */); | |
6133 | ||
3cb719bd | 6134 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6135 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6136 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6137 | The default is t, which means that text is invisible |
6138 | if it has a non-nil `invisible' property. | |
6139 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6140 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6141 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6142 | then characters with property value PROP are invisible, | |
6143 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6144 | |
7962a441 | 6145 | DEFVAR_PER_BUFFER ("buffer-display-count", |
58cc0a01 | 6146 | &BVAR (current_buffer, display_count), Qintegerp, |
7ee72033 | 6147 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6148 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6149 | |
6150 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6151 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6152 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6153 | The function `set-window-buffer' updates this variable |
6154 | to the value obtained by calling `current-time'. | |
6155 | If the buffer has never been shown in a window, the value is nil. */); | |
6156 | ||
29208e82 | 6157 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6158 | doc: /* Non-nil if Transient Mark mode is enabled. |
6159 | See the command `transient-mark-mode' for a description of this minor mode. | |
6160 | ||
6161 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6162 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6163 | all windows or just the selected window. | |
6164 | ||
f49d1f52 | 6165 | Lisp programs may give this variable certain special values: |
9d794026 | 6166 | |
f49d1f52 SM |
6167 | - A value of `lambda' enables Transient Mark mode temporarily. |
6168 | It is disabled again after any subsequent action that would | |
6169 | normally deactivate the mark (e.g. buffer modification). | |
6170 | ||
6171 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6172 | temporarily. After any subsequent point motion command that is | |
6173 | not shift-translated, or any other action that would normally | |
6174 | deactivate the mark (e.g. buffer modification), the value of | |
6175 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6176 | Vtransient_mark_mode = Qnil; |
6177 | ||
29208e82 | 6178 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 6179 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6180 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6181 | text properties. If the value is a list, disregard `buffer-read-only' | |
6182 | and disregard a `read-only' text property if the property value | |
6183 | is a member of the list. */); | |
a96b68f1 RS |
6184 | Vinhibit_read_only = Qnil; |
6185 | ||
4b4deea2 | 6186 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6187 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6188 | Values are interpreted as follows: |
6189 | ||
0f7b074f CY |
6190 | t use the cursor specified for the frame |
6191 | nil don't display a cursor | |
6192 | box display a filled box cursor | |
6193 | hollow display a hollow box cursor | |
6194 | bar display a vertical bar cursor with default width | |
6195 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6196 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6197 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
0f7b074f | 6198 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6199 | |
e08b1705 MR |
6200 | When the buffer is displayed in a non-selected window, the |
6201 | cursor's appearance is instead controlled by the variable | |
6202 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6203 | |
a3bbced0 | 6204 | DEFVAR_PER_BUFFER ("line-spacing", |
58cc0a01 | 6205 | &BVAR (current_buffer, extra_line_spacing), Qnumberp, |
7ee72033 | 6206 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6207 | The space is measured in pixels, and put below lines on graphic displays, |
6208 | see `display-graphic-p'. | |
60ebfdf3 | 6209 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6210 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6211 | |
0124c5bd | 6212 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6213 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6214 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6215 | If nil, only shows a cursor in the selected window. |
6216 | If t, displays a cursor related to the usual cursor type | |
6217 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6218 | You can also specify the cursor type as in the `cursor-type' variable. | |
6219 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6220 | |
29208e82 | 6221 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6222 | doc: /* List of functions called with no args to query before killing a buffer. |
6223 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6224 | |
6225 | If any of them returns nil, the buffer is not killed. Functions run by | |
6226 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6227 | Vkill_buffer_query_functions = Qnil; |
6228 | ||
29208e82 | 6229 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6230 | doc: /* Normal hook run before changing the major mode of a buffer. |
6231 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6232 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6233 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6234 | |
9397e56f MR |
6235 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6236 | doc: /* Hook run when the buffer list changes. | |
6237 | Functions running this hook are `get-buffer-create', | |
6238 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6239 | and `bury-buffer-internal'. */); |
9397e56f | 6240 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6241 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6242 | |
0dc88e60 | 6243 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6244 | defsubr (&Sbuffer_list); |
6245 | defsubr (&Sget_buffer); | |
6246 | defsubr (&Sget_file_buffer); | |
6247 | defsubr (&Sget_buffer_create); | |
336cd056 | 6248 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6249 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6250 | defsubr (&Sbuffer_name); |
1ab256cb | 6251 | defsubr (&Sbuffer_file_name); |
336cd056 | 6252 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6253 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6254 | defsubr (&Sbuffer_local_variables); |
6255 | defsubr (&Sbuffer_modified_p); | |
6256 | defsubr (&Sset_buffer_modified_p); | |
6257 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6258 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6259 | defsubr (&Srename_buffer); |
6260 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6261 | defsubr (&Sbuffer_enable_undo); |
6262 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6263 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6264 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6265 | defsubr (&Scurrent_buffer); |
6266 | defsubr (&Sset_buffer); | |
6267 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6268 | defsubr (&Serase_buffer); |
13cda5f9 | 6269 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6270 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6271 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6272 | |
52f8ec73 | 6273 | defsubr (&Soverlayp); |
2eec3b4e RS |
6274 | defsubr (&Smake_overlay); |
6275 | defsubr (&Sdelete_overlay); | |
c5e28e39 | 6276 | defsubr (&Sdelete_all_overlays); |
2eec3b4e | 6277 | defsubr (&Smove_overlay); |
8ebafa8d JB |
6278 | defsubr (&Soverlay_start); |
6279 | defsubr (&Soverlay_end); | |
6280 | defsubr (&Soverlay_buffer); | |
6281 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6282 | defsubr (&Soverlays_at); |
74514898 | 6283 | defsubr (&Soverlays_in); |
2eec3b4e | 6284 | defsubr (&Snext_overlay_change); |
239c932b | 6285 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6286 | defsubr (&Soverlay_recenter); |
6287 | defsubr (&Soverlay_lists); | |
6288 | defsubr (&Soverlay_get); | |
6289 | defsubr (&Soverlay_put); | |
a8c21b48 | 6290 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6291 | } |
6292 | ||
dfcf069d | 6293 | void |
d3da34e0 | 6294 | keys_of_buffer (void) |
1ab256cb RM |
6295 | { |
6296 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6297 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6298 | |
6299 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6300 | initialized when that function gets called. */ | |
d67b4f80 | 6301 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6302 | } |