Commit | Line | Data |
---|---|---|
1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
96a72ee9 | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
1ab256cb RM |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 19 | |
68c45bf0 | 20 | #include <config.h> |
1ab256cb | 21 | |
f162bcc3 PE |
22 | #define BUFFER_INLINE EXTERN_INLINE |
23 | ||
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
d7306fe6 | 29 | #include <setjmp.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 PE |
153 | /* These setters are used only in this file, so they can be private. */ |
154 | static inline void | |
155 | bset_abbrev_mode (struct buffer *b, Lisp_Object val) | |
156 | { | |
157 | b->INTERNAL_FIELD (abbrev_mode) = val; | |
158 | } | |
159 | static inline void | |
160 | bset_abbrev_table (struct buffer *b, Lisp_Object val) | |
161 | { | |
162 | b->INTERNAL_FIELD (abbrev_table) = val; | |
163 | } | |
164 | static inline void | |
165 | bset_auto_fill_function (struct buffer *b, Lisp_Object val) | |
166 | { | |
167 | b->INTERNAL_FIELD (auto_fill_function) = val; | |
168 | } | |
169 | static inline void | |
170 | bset_auto_save_file_format (struct buffer *b, Lisp_Object val) | |
171 | { | |
172 | b->INTERNAL_FIELD (auto_save_file_format) = val; | |
173 | } | |
174 | static inline void | |
175 | bset_auto_save_file_name (struct buffer *b, Lisp_Object val) | |
176 | { | |
177 | b->INTERNAL_FIELD (auto_save_file_name) = val; | |
178 | } | |
179 | static inline void | |
180 | bset_backed_up (struct buffer *b, Lisp_Object val) | |
181 | { | |
182 | b->INTERNAL_FIELD (backed_up) = val; | |
183 | } | |
184 | static inline void | |
185 | bset_begv_marker (struct buffer *b, Lisp_Object val) | |
186 | { | |
187 | b->INTERNAL_FIELD (begv_marker) = val; | |
188 | } | |
189 | static inline void | |
190 | bset_bidi_display_reordering (struct buffer *b, Lisp_Object val) | |
191 | { | |
192 | b->INTERNAL_FIELD (bidi_display_reordering) = val; | |
193 | } | |
194 | static inline void | |
195 | bset_buffer_file_coding_system (struct buffer *b, Lisp_Object val) | |
196 | { | |
197 | b->INTERNAL_FIELD (buffer_file_coding_system) = val; | |
198 | } | |
199 | static inline void | |
200 | bset_cache_long_line_scans (struct buffer *b, Lisp_Object val) | |
201 | { | |
202 | b->INTERNAL_FIELD (cache_long_line_scans) = val; | |
203 | } | |
204 | static inline void | |
205 | bset_case_fold_search (struct buffer *b, Lisp_Object val) | |
206 | { | |
207 | b->INTERNAL_FIELD (case_fold_search) = val; | |
208 | } | |
209 | static inline void | |
210 | bset_ctl_arrow (struct buffer *b, Lisp_Object val) | |
211 | { | |
212 | b->INTERNAL_FIELD (ctl_arrow) = val; | |
213 | } | |
214 | static inline void | |
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 | } | |
219 | static inline void | |
220 | bset_cursor_type (struct buffer *b, Lisp_Object val) | |
221 | { | |
222 | b->INTERNAL_FIELD (cursor_type) = val; | |
223 | } | |
224 | static inline void | |
225 | bset_display_table (struct buffer *b, Lisp_Object val) | |
226 | { | |
227 | b->INTERNAL_FIELD (display_table) = val; | |
228 | } | |
229 | static inline void | |
230 | bset_extra_line_spacing (struct buffer *b, Lisp_Object val) | |
231 | { | |
232 | b->INTERNAL_FIELD (extra_line_spacing) = val; | |
233 | } | |
234 | static inline void | |
235 | bset_file_format (struct buffer *b, Lisp_Object val) | |
236 | { | |
237 | b->INTERNAL_FIELD (file_format) = val; | |
238 | } | |
239 | static inline void | |
240 | bset_file_truename (struct buffer *b, Lisp_Object val) | |
241 | { | |
242 | b->INTERNAL_FIELD (file_truename) = val; | |
243 | } | |
244 | static inline void | |
245 | bset_fringe_cursor_alist (struct buffer *b, Lisp_Object val) | |
246 | { | |
247 | b->INTERNAL_FIELD (fringe_cursor_alist) = val; | |
248 | } | |
249 | static inline void | |
250 | bset_fringe_indicator_alist (struct buffer *b, Lisp_Object val) | |
251 | { | |
252 | b->INTERNAL_FIELD (fringe_indicator_alist) = val; | |
253 | } | |
254 | static inline void | |
255 | bset_fringes_outside_margins (struct buffer *b, Lisp_Object val) | |
256 | { | |
257 | b->INTERNAL_FIELD (fringes_outside_margins) = val; | |
258 | } | |
259 | static inline void | |
260 | bset_header_line_format (struct buffer *b, Lisp_Object val) | |
261 | { | |
262 | b->INTERNAL_FIELD (header_line_format) = val; | |
263 | } | |
264 | static inline void | |
265 | bset_indicate_buffer_boundaries (struct buffer *b, Lisp_Object val) | |
266 | { | |
267 | b->INTERNAL_FIELD (indicate_buffer_boundaries) = val; | |
268 | } | |
269 | static inline void | |
270 | bset_indicate_empty_lines (struct buffer *b, Lisp_Object val) | |
271 | { | |
272 | b->INTERNAL_FIELD (indicate_empty_lines) = val; | |
273 | } | |
274 | static inline void | |
275 | bset_invisibility_spec (struct buffer *b, Lisp_Object val) | |
276 | { | |
277 | b->INTERNAL_FIELD (invisibility_spec) = val; | |
278 | } | |
279 | static inline void | |
280 | bset_left_fringe_width (struct buffer *b, Lisp_Object val) | |
281 | { | |
282 | b->INTERNAL_FIELD (left_fringe_width) = val; | |
283 | } | |
284 | static inline void | |
285 | bset_major_mode (struct buffer *b, Lisp_Object val) | |
286 | { | |
287 | b->INTERNAL_FIELD (major_mode) = val; | |
288 | } | |
289 | static inline void | |
290 | bset_mark (struct buffer *b, Lisp_Object val) | |
291 | { | |
292 | b->INTERNAL_FIELD (mark) = val; | |
293 | } | |
294 | static inline void | |
295 | bset_minor_modes (struct buffer *b, Lisp_Object val) | |
296 | { | |
297 | b->INTERNAL_FIELD (minor_modes) = val; | |
298 | } | |
299 | static inline void | |
300 | bset_mode_line_format (struct buffer *b, Lisp_Object val) | |
301 | { | |
302 | b->INTERNAL_FIELD (mode_line_format) = val; | |
303 | } | |
304 | static inline void | |
305 | bset_mode_name (struct buffer *b, Lisp_Object val) | |
306 | { | |
307 | b->INTERNAL_FIELD (mode_name) = val; | |
308 | } | |
309 | static inline void | |
310 | bset_name (struct buffer *b, Lisp_Object val) | |
311 | { | |
312 | b->INTERNAL_FIELD (name) = val; | |
313 | } | |
314 | static inline void | |
315 | bset_overwrite_mode (struct buffer *b, Lisp_Object val) | |
316 | { | |
317 | b->INTERNAL_FIELD (overwrite_mode) = val; | |
318 | } | |
319 | static inline void | |
320 | bset_pt_marker (struct buffer *b, Lisp_Object val) | |
321 | { | |
322 | b->INTERNAL_FIELD (pt_marker) = val; | |
323 | } | |
324 | static inline void | |
325 | bset_right_fringe_width (struct buffer *b, Lisp_Object val) | |
326 | { | |
327 | b->INTERNAL_FIELD (right_fringe_width) = val; | |
328 | } | |
329 | static inline void | |
330 | bset_save_length (struct buffer *b, Lisp_Object val) | |
331 | { | |
332 | b->INTERNAL_FIELD (save_length) = val; | |
333 | } | |
334 | static inline void | |
335 | bset_scroll_bar_width (struct buffer *b, Lisp_Object val) | |
336 | { | |
337 | b->INTERNAL_FIELD (scroll_bar_width) = val; | |
338 | } | |
339 | static inline void | |
340 | bset_scroll_down_aggressively (struct buffer *b, Lisp_Object val) | |
341 | { | |
342 | b->INTERNAL_FIELD (scroll_down_aggressively) = val; | |
343 | } | |
344 | static inline void | |
345 | bset_scroll_up_aggressively (struct buffer *b, Lisp_Object val) | |
346 | { | |
347 | b->INTERNAL_FIELD (scroll_up_aggressively) = val; | |
348 | } | |
349 | static inline void | |
350 | bset_selective_display (struct buffer *b, Lisp_Object val) | |
351 | { | |
352 | b->INTERNAL_FIELD (selective_display) = val; | |
353 | } | |
354 | static inline void | |
355 | bset_selective_display_ellipses (struct buffer *b, Lisp_Object val) | |
356 | { | |
357 | b->INTERNAL_FIELD (selective_display_ellipses) = val; | |
358 | } | |
359 | static inline void | |
360 | bset_vertical_scroll_bar_type (struct buffer *b, Lisp_Object val) | |
361 | { | |
362 | b->INTERNAL_FIELD (vertical_scroll_bar_type) = val; | |
363 | } | |
364 | static inline void | |
365 | bset_word_wrap (struct buffer *b, Lisp_Object val) | |
366 | { | |
367 | b->INTERNAL_FIELD (word_wrap) = val; | |
368 | } | |
369 | static inline void | |
370 | bset_zv_marker (struct buffer *b, Lisp_Object val) | |
371 | { | |
372 | b->INTERNAL_FIELD (zv_marker) = val; | |
373 | } | |
374 | ||
1ab256cb RM |
375 | /* For debugging; temporary. See set_buffer_internal. */ |
376 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
377 | ||
01136e9b | 378 | void |
d3da34e0 | 379 | nsberror (Lisp_Object spec) |
1ab256cb | 380 | { |
a7a60ce9 | 381 | if (STRINGP (spec)) |
d5db4077 | 382 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
383 | error ("Invalid buffer argument"); |
384 | } | |
385 | \f | |
a7ca3326 | 386 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
387 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
388 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 389 | (Lisp_Object object) |
0dc88e60 | 390 | { |
e578f381 | 391 | return ((BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object))) |
0dc88e60 RS |
392 | ? Qt : Qnil); |
393 | } | |
394 | ||
08460cd4 | 395 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 396 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
397 | If the optional arg FRAME is a frame, we return the buffer list in the |
398 | proper order for that frame: the buffers show in FRAME come first, | |
399 | followed by the rest of the buffers. */) | |
5842a27b | 400 | (Lisp_Object frame) |
1ab256cb | 401 | { |
a18b8cb5 | 402 | Lisp_Object general; |
08460cd4 RS |
403 | general = Fmapcar (Qcdr, Vbuffer_alist); |
404 | ||
405 | if (FRAMEP (frame)) | |
406 | { | |
a18b8cb5 KL |
407 | Lisp_Object framelist, prevlist, tail; |
408 | Lisp_Object args[3]; | |
08460cd4 | 409 | |
b7826503 | 410 | CHECK_FRAME (frame); |
e69b0960 | 411 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f | 412 | prevlist = Fnreverse (Fcopy_sequence |
e69b0960 | 413 | (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 414 | |
a18b8cb5 KL |
415 | /* Remove from GENERAL any buffer that duplicates one in |
416 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 417 | tail = framelist; |
a18b8cb5 | 418 | while (CONSP (tail)) |
08460cd4 | 419 | { |
7539e11f KR |
420 | general = Fdelq (XCAR (tail), general); |
421 | tail = XCDR (tail); | |
08460cd4 | 422 | } |
a18b8cb5 KL |
423 | tail = prevlist; |
424 | while (CONSP (tail)) | |
425 | { | |
426 | general = Fdelq (XCAR (tail), general); | |
427 | tail = XCDR (tail); | |
428 | } | |
429 | ||
430 | args[0] = framelist; | |
431 | args[1] = general; | |
432 | args[2] = prevlist; | |
433 | return Fnconc (3, args); | |
08460cd4 | 434 | } |
9397e56f MR |
435 | else |
436 | return general; | |
1ab256cb RM |
437 | } |
438 | ||
04ae1b48 RS |
439 | /* Like Fassoc, but use Fstring_equal to compare |
440 | (which ignores text properties), | |
441 | and don't ever QUIT. */ | |
442 | ||
443 | static Lisp_Object | |
d3da34e0 | 444 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
445 | { |
446 | register Lisp_Object tail; | |
6d70a280 | 447 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
448 | { |
449 | register Lisp_Object elt, tem; | |
6d70a280 | 450 | elt = XCAR (tail); |
04ae1b48 RS |
451 | tem = Fstring_equal (Fcar (elt), key); |
452 | if (!NILP (tem)) | |
453 | return elt; | |
454 | } | |
455 | return Qnil; | |
456 | } | |
457 | ||
a7ca3326 | 458 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
459 | doc: /* Return the buffer named BUFFER-OR-NAME. |
460 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
461 | is a string and there is no buffer with that name, return nil. If | |
462 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 463 | (register Lisp_Object buffer_or_name) |
1ab256cb | 464 | { |
c8804c4f MR |
465 | if (BUFFERP (buffer_or_name)) |
466 | return buffer_or_name; | |
467 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 468 | |
c8804c4f | 469 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
470 | } |
471 | ||
472 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 473 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
474 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
475 | If there is no such live buffer, return nil. | |
7ee72033 | 476 | See also `find-buffer-visiting'. */) |
5842a27b | 477 | (register Lisp_Object filename) |
1ab256cb RM |
478 | { |
479 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
480 | Lisp_Object handler; |
481 | ||
b7826503 | 482 | CHECK_STRING (filename); |
1ab256cb RM |
483 | filename = Fexpand_file_name (filename, Qnil); |
484 | ||
5fe0b67e RS |
485 | /* If the file name has special constructs in it, |
486 | call the corresponding file handler. */ | |
a617e913 | 487 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 488 | if (!NILP (handler)) |
a59225b1 CY |
489 | { |
490 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
491 | filename); | |
492 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
493 | } | |
5fe0b67e | 494 | |
7539e11f | 495 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 496 | { |
7539e11f | 497 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 498 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
499 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
500 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 501 | if (!NILP (tem)) |
1ab256cb RM |
502 | return buf; |
503 | } | |
504 | return Qnil; | |
505 | } | |
506 | ||
52e01189 | 507 | Lisp_Object |
d3da34e0 | 508 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
509 | { |
510 | register Lisp_Object tail, buf, tem; | |
511 | ||
7539e11f | 512 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 513 | { |
7539e11f | 514 | buf = Fcdr (XCAR (tail)); |
52e01189 | 515 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
516 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
517 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
518 | if (!NILP (tem)) |
519 | return buf; | |
520 | } | |
521 | return Qnil; | |
522 | } | |
523 | ||
a7ca3326 | 524 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
525 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
526 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
527 | return that buffer. If no such buffer exists, create a new buffer with | |
528 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
529 | buffer does not keep undo information. | |
530 | ||
531 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
532 | even if it is dead. The return value is never nil. */) | |
5842a27b | 533 | (register Lisp_Object buffer_or_name) |
1ab256cb | 534 | { |
cd265ca6 | 535 | register Lisp_Object buffer, name; |
1ab256cb RM |
536 | register struct buffer *b; |
537 | ||
cd265ca6 MR |
538 | buffer = Fget_buffer (buffer_or_name); |
539 | if (!NILP (buffer)) | |
540 | return buffer; | |
1ab256cb | 541 | |
cd265ca6 | 542 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
543 | error ("Empty string for buffer name is not allowed"); |
544 | ||
cc648cef | 545 | b = allocate_buffer (); |
1ab256cb | 546 | |
336cd056 RS |
547 | /* An ordinary buffer uses its own struct buffer_text. */ |
548 | b->text = &b->own_text; | |
9928463d DA |
549 | b->base_buffer = NULL; |
550 | /* No one shares the text with us now. */ | |
551 | b->indirections = 0; | |
336cd056 | 552 | |
1ab256cb | 553 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 554 | BLOCK_INPUT; |
3b06f880 KH |
555 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
556 | anchoring a search. */ | |
b86af064 | 557 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 558 | UNBLOCK_INPUT; |
1ab256cb | 559 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 560 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 561 | |
cffc6f3b CY |
562 | b->pt = BEG; |
563 | b->begv = BEG; | |
564 | b->zv = BEG; | |
565 | b->pt_byte = BEG_BYTE; | |
566 | b->begv_byte = BEG_BYTE; | |
567 | b->zv_byte = BEG_BYTE; | |
568 | ||
6d70a280 | 569 | BUF_GPT (b) = BEG; |
6d70a280 | 570 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
571 | |
572 | BUF_Z (b) = BEG; | |
6d70a280 | 573 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 574 | BUF_MODIFF (b) = 1; |
3e145152 | 575 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 576 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 | 577 | BUF_SAVE_MODIFF (b) = 1; |
0c94c8d6 | 578 | set_buffer_intervals (b, NULL); |
b5a225b4 GM |
579 | BUF_UNCHANGED_MODIFIED (b) = 1; |
580 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
581 | BUF_END_UNCHANGED (b) = 0; | |
582 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 583 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 584 | b->text->inhibit_shrinking = 0; |
1ab256cb | 585 | |
28e969dd JB |
586 | b->newline_cache = 0; |
587 | b->width_run_cache = 0; | |
39eb03f1 | 588 | bset_width_table (b, Qnil); |
b5a225b4 | 589 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 590 | |
336cd056 RS |
591 | /* An ordinary buffer normally doesn't need markers |
592 | to handle BEGV and ZV. */ | |
39eb03f1 PE |
593 | bset_pt_marker (b, Qnil); |
594 | bset_begv_marker (b, Qnil); | |
595 | bset_zv_marker (b, Qnil); | |
04ae1b48 | 596 | |
cd265ca6 | 597 | name = Fcopy_sequence (buffer_or_name); |
0c94c8d6 | 598 | set_string_intervals (name, NULL); |
39eb03f1 | 599 | bset_name (b, name); |
04ae1b48 | 600 | |
39eb03f1 | 601 | bset_undo_list (b, SREF (name, 0) != ' ' ? Qnil : Qt); |
1ab256cb RM |
602 | |
603 | reset_buffer (b); | |
13de9290 | 604 | reset_buffer_local_variables (b, 1); |
1ab256cb | 605 | |
39eb03f1 | 606 | bset_mark (b, Fmake_marker ()); |
65745fad | 607 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 608 | |
1ab256cb | 609 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
610 | XSETBUFFER (buffer, b); |
611 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
612 | /* And run buffer-list-update-hook. */ |
613 | if (!NILP (Vrun_hooks)) | |
614 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 615 | |
cd265ca6 | 616 | return buffer; |
336cd056 RS |
617 | } |
618 | ||
7e9d5818 | 619 | |
04e4cb3a GM |
620 | /* Return a list of overlays which is a copy of the overlay list |
621 | LIST, but for buffer B. */ | |
622 | ||
2410d73a | 623 | static struct Lisp_Overlay * |
d3da34e0 | 624 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 625 | { |
2410d73a | 626 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 627 | |
2410d73a | 628 | for (; list; list = list->next) |
04e4cb3a | 629 | { |
fa691a83 DA |
630 | Lisp_Object overlay, start, end; |
631 | struct Lisp_Marker *m; | |
04e4cb3a | 632 | |
c644523b DA |
633 | eassert (MARKERP (list->start)); |
634 | m = XMARKER (list->start); | |
fa691a83 DA |
635 | start = build_marker (b, m->charpos, m->bytepos); |
636 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 637 | |
c644523b DA |
638 | eassert (MARKERP (list->end)); |
639 | m = XMARKER (list->end); | |
fa691a83 DA |
640 | end = build_marker (b, m->charpos, m->bytepos); |
641 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 642 | |
c644523b | 643 | overlay = build_overlay (start, end, Fcopy_sequence (list->plist)); |
2410d73a SM |
644 | if (tail) |
645 | tail = tail->next = XOVERLAY (overlay); | |
646 | else | |
647 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
648 | } |
649 | ||
2410d73a | 650 | return result; |
04e4cb3a | 651 | } |
177c0ea7 | 652 | |
0c94c8d6 PE |
653 | /* Set an appropriate overlay of B. */ |
654 | ||
655 | static inline void | |
656 | set_buffer_overlays_before (struct buffer *b, struct Lisp_Overlay *o) | |
657 | { | |
658 | b->overlays_before = o; | |
659 | } | |
660 | ||
661 | static inline void | |
662 | set_buffer_overlays_after (struct buffer *b, struct Lisp_Overlay *o) | |
663 | { | |
664 | b->overlays_after = o; | |
665 | } | |
04e4cb3a | 666 | |
7e9d5818 GM |
667 | /* Clone per-buffer values of buffer FROM. |
668 | ||
669 | Buffer TO gets the same per-buffer values as FROM, with the | |
670 | following exceptions: (1) TO's name is left untouched, (2) markers | |
671 | are copied and made to refer to TO, and (3) overlay lists are | |
672 | copied. */ | |
673 | ||
674 | static void | |
d3da34e0 | 675 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 676 | { |
7e9d5818 GM |
677 | int offset; |
678 | ||
52b852c7 | 679 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
680 | { |
681 | Lisp_Object obj; | |
682 | ||
4b7cdc0e SM |
683 | /* Don't touch the `name' which should be unique for every buffer. */ |
684 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
685 | continue; | |
686 | ||
4ce60d2e | 687 | obj = per_buffer_value (from, offset); |
ce5b453a | 688 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
689 | { |
690 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
691 | |
692 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 693 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
694 | } |
695 | ||
4ce60d2e | 696 | set_per_buffer_value (to, offset, obj); |
7e9d5818 GM |
697 | } |
698 | ||
72af86bd | 699 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 700 | |
0c94c8d6 PE |
701 | set_buffer_overlays_before (to, copy_overlays (to, from->overlays_before)); |
702 | set_buffer_overlays_after (to, copy_overlays (to, from->overlays_after)); | |
02f28bbd | 703 | |
e1688f54 RS |
704 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
705 | and install that in TO. */ | |
39eb03f1 | 706 | bset_local_var_alist (to, buffer_lisp_local_variables (from, 1)); |
7e9d5818 GM |
707 | } |
708 | ||
cffc6f3b CY |
709 | |
710 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
711 | current, update these markers. */ | |
712 | ||
713 | static void | |
714 | record_buffer_markers (struct buffer *b) | |
715 | { | |
716 | if (! NILP (BVAR (b, pt_marker))) | |
717 | { | |
718 | Lisp_Object buffer; | |
719 | ||
720 | eassert (!NILP (BVAR (b, begv_marker))); | |
721 | eassert (!NILP (BVAR (b, zv_marker))); | |
722 | ||
723 | XSETBUFFER (buffer, b); | |
724 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
725 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
726 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
727 | } | |
728 | } | |
729 | ||
730 | ||
731 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
732 | current, fetch these values into B->begv etc. */ | |
733 | ||
734 | static void | |
735 | fetch_buffer_markers (struct buffer *b) | |
736 | { | |
737 | if (! NILP (BVAR (b, pt_marker))) | |
738 | { | |
739 | Lisp_Object m; | |
740 | ||
741 | eassert (!NILP (BVAR (b, begv_marker))); | |
742 | eassert (!NILP (BVAR (b, zv_marker))); | |
743 | ||
744 | m = BVAR (b, pt_marker); | |
745 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
746 | ||
747 | m = BVAR (b, begv_marker); | |
748 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
749 | ||
750 | m = BVAR (b, zv_marker); | |
751 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
752 | } | |
753 | } | |
754 | ||
755 | ||
7e9d5818 GM |
756 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
757 | 2, 3, | |
193c3837 | 758 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 759 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 760 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
761 | NAME should be a string which is not the name of an existing buffer. |
762 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
763 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 764 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 765 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 766 | { |
6b61353c | 767 | Lisp_Object buf, tem; |
7e9d5818 | 768 | struct buffer *b; |
336cd056 | 769 | |
6b61353c | 770 | CHECK_STRING (name); |
336cd056 RS |
771 | buf = Fget_buffer (name); |
772 | if (!NILP (buf)) | |
d5db4077 | 773 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 774 | |
6b61353c | 775 | tem = base_buffer; |
336cd056 RS |
776 | base_buffer = Fget_buffer (base_buffer); |
777 | if (NILP (base_buffer)) | |
6b61353c | 778 | error ("No such buffer: `%s'", SDATA (tem)); |
e578f381 | 779 | if (!BUFFER_LIVE_P (XBUFFER (base_buffer))) |
6b61353c | 780 | error ("Base buffer has been killed"); |
336cd056 | 781 | |
d5db4077 | 782 | if (SCHARS (name) == 0) |
336cd056 RS |
783 | error ("Empty string for buffer name is not allowed"); |
784 | ||
cc648cef | 785 | b = allocate_buffer (); |
336cd056 | 786 | |
9928463d DA |
787 | /* No double indirection - if base buffer is indirect, |
788 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
789 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
790 | ? XBUFFER (base_buffer)->base_buffer | |
791 | : XBUFFER (base_buffer)); | |
336cd056 RS |
792 | |
793 | /* Use the base buffer's text object. */ | |
794 | b->text = b->base_buffer->text; | |
9928463d DA |
795 | /* We have no own text. */ |
796 | b->indirections = -1; | |
797 | /* Notify base buffer that we share the text now. */ | |
798 | b->base_buffer->indirections++; | |
336cd056 | 799 | |
cffc6f3b CY |
800 | b->pt = b->base_buffer->pt; |
801 | b->begv = b->base_buffer->begv; | |
802 | b->zv = b->base_buffer->zv; | |
803 | b->pt_byte = b->base_buffer->pt_byte; | |
804 | b->begv_byte = b->base_buffer->begv_byte; | |
805 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
806 | |
807 | b->newline_cache = 0; | |
808 | b->width_run_cache = 0; | |
39eb03f1 | 809 | bset_width_table (b, Qnil); |
336cd056 | 810 | |
336cd056 | 811 | name = Fcopy_sequence (name); |
0c94c8d6 | 812 | set_string_intervals (name, NULL); |
39eb03f1 | 813 | bset_name (b, name); |
336cd056 RS |
814 | |
815 | reset_buffer (b); | |
13de9290 | 816 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
817 | |
818 | /* Put this in the alist of all live buffers. */ | |
819 | XSETBUFFER (buf, b); | |
820 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
821 | ||
39eb03f1 | 822 | bset_mark (b, Fmake_marker ()); |
336cd056 | 823 | |
abc9d959 | 824 | /* The multibyte status belongs to the base buffer. */ |
39eb03f1 PE |
825 | bset_enable_multibyte_characters |
826 | (b, BVAR (b->base_buffer, enable_multibyte_characters)); | |
abc9d959 | 827 | |
336cd056 | 828 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 829 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 830 | { |
2aa46d6c CY |
831 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
832 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 833 | |
39eb03f1 PE |
834 | bset_pt_marker (b->base_buffer, |
835 | build_marker (b->base_buffer, b->base_buffer->pt, | |
836 | b->base_buffer->pt_byte)); | |
657924ff | 837 | |
39eb03f1 PE |
838 | bset_begv_marker (b->base_buffer, |
839 | build_marker (b->base_buffer, b->base_buffer->begv, | |
840 | b->base_buffer->begv_byte)); | |
cffc6f3b | 841 | |
39eb03f1 PE |
842 | bset_zv_marker (b->base_buffer, |
843 | build_marker (b->base_buffer, b->base_buffer->zv, | |
844 | b->base_buffer->zv_byte)); | |
cffc6f3b | 845 | |
4b4deea2 | 846 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
847 | } |
848 | ||
7e9d5818 GM |
849 | if (NILP (clone)) |
850 | { | |
851 | /* Give the indirect buffer markers for its narrowing. */ | |
39eb03f1 PE |
852 | bset_pt_marker (b, build_marker (b, b->pt, b->pt_byte)); |
853 | bset_begv_marker (b, build_marker (b, b->begv, b->begv_byte)); | |
854 | bset_zv_marker (b, build_marker (b, b->zv, b->zv_byte)); | |
4b4deea2 | 855 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
856 | } |
857 | else | |
7fa57e45 RS |
858 | { |
859 | struct buffer *old_b = current_buffer; | |
860 | ||
861 | clone_per_buffer_values (b->base_buffer, b); | |
39eb03f1 PE |
862 | bset_filename (b, Qnil); |
863 | bset_file_truename (b, Qnil); | |
864 | bset_display_count (b, make_number (0)); | |
865 | bset_backed_up (b, Qnil); | |
866 | bset_auto_save_file_name (b, Qnil); | |
7fa57e45 RS |
867 | set_buffer_internal_1 (b); |
868 | Fset (intern ("buffer-save-without-query"), Qnil); | |
869 | Fset (intern ("buffer-file-number"), Qnil); | |
870 | Fset (intern ("buffer-stale-function"), Qnil); | |
871 | set_buffer_internal_1 (old_b); | |
872 | } | |
336cd056 | 873 | |
9397e56f MR |
874 | /* Run buffer-list-update-hook. */ |
875 | if (!NILP (Vrun_hooks)) | |
876 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
877 | ||
a9ee7a59 | 878 | return buf; |
1ab256cb RM |
879 | } |
880 | ||
041a49a6 DA |
881 | /* Mark OV as no longer associated with B. */ |
882 | ||
883 | static void | |
884 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
885 | { | |
c644523b DA |
886 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); |
887 | modify_overlay (b, marker_position (ov->start), | |
888 | marker_position (ov->end)); | |
889 | Fset_marker (ov->start, Qnil, Qnil); | |
890 | Fset_marker (ov->end, Qnil, Qnil); | |
041a49a6 DA |
891 | |
892 | } | |
893 | ||
894 | /* Delete all overlays of B and reset it's overlay lists. */ | |
895 | ||
d4f5719a | 896 | void |
d3da34e0 | 897 | delete_all_overlays (struct buffer *b) |
d4f5719a | 898 | { |
041a49a6 | 899 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 900 | |
fd318b54 | 901 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 902 | { |
041a49a6 DA |
903 | drop_overlay (b, ov); |
904 | next = ov->next; | |
905 | ov->next = NULL; | |
d4f5719a | 906 | } |
041a49a6 | 907 | |
fd318b54 | 908 | for (ov = b->overlays_after; ov; ov = next) |
d4f5719a | 909 | { |
041a49a6 DA |
910 | drop_overlay (b, ov); |
911 | next = ov->next; | |
912 | ov->next = NULL; | |
d4f5719a | 913 | } |
041a49a6 | 914 | |
0c94c8d6 PE |
915 | set_buffer_overlays_before (b, NULL); |
916 | set_buffer_overlays_after (b, NULL); | |
d4f5719a SM |
917 | } |
918 | ||
bcd40520 | 919 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 920 | and local variables. |
d4f5719a SM |
921 | If called on an already-initialized buffer, the list of overlays |
922 | should be deleted before calling this function, otherwise we end up | |
923 | with overlays that claim to belong to the buffer but the buffer | |
924 | claims it doesn't belong to it. */ | |
1ab256cb RM |
925 | |
926 | void | |
d3da34e0 | 927 | reset_buffer (register struct buffer *b) |
1ab256cb | 928 | { |
39eb03f1 PE |
929 | bset_filename (b, Qnil); |
930 | bset_file_truename (b, Qnil); | |
931 | bset_directory (b, current_buffer ? BVAR (current_buffer, directory) : Qnil); | |
e9a9ae03 | 932 | b->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 933 | b->modtime_size = -1; |
4b4deea2 | 934 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 935 | b->last_window_start = 1; |
8b264726 | 936 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
937 | b->clip_changed = 0; |
938 | b->prevent_redisplay_optimizations_p = 1; | |
39eb03f1 | 939 | bset_backed_up (b, Qnil); |
0b5397c2 | 940 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 941 | b->auto_save_failure_time = 0; |
39eb03f1 PE |
942 | bset_auto_save_file_name (b, Qnil); |
943 | bset_read_only (b, Qnil); | |
0c94c8d6 PE |
944 | set_buffer_overlays_before (b, NULL); |
945 | set_buffer_overlays_after (b, NULL); | |
c2d5b10f | 946 | b->overlay_center = BEG; |
39eb03f1 PE |
947 | bset_mark_active (b, Qnil); |
948 | bset_point_before_scroll (b, Qnil); | |
949 | bset_file_format (b, Qnil); | |
950 | bset_auto_save_file_format (b, Qt); | |
951 | bset_last_selected_window (b, Qnil); | |
952 | bset_display_count (b, make_number (0)); | |
953 | bset_display_time (b, Qnil); | |
954 | bset_enable_multibyte_characters | |
955 | (b, BVAR (&buffer_defaults, enable_multibyte_characters)); | |
956 | bset_cursor_type (b, BVAR (&buffer_defaults, cursor_type)); | |
957 | bset_extra_line_spacing (b, BVAR (&buffer_defaults, extra_line_spacing)); | |
0522997d RS |
958 | |
959 | b->display_error_modiff = 0; | |
1ab256cb RM |
960 | } |
961 | ||
bcd40520 RS |
962 | /* Reset buffer B's local variables info. |
963 | Don't use this on a buffer that has already been in use; | |
964 | it does not treat permanent locals consistently. | |
13de9290 RS |
965 | Instead, use Fkill_all_local_variables. |
966 | ||
37ef52bb PE |
967 | If PERMANENT_TOO, reset permanent buffer-local variables. |
968 | If not, preserve those. */ | |
bcd40520 | 969 | |
13de9290 | 970 | static void |
37ef52bb | 971 | reset_buffer_local_variables (struct buffer *b, bool permanent_too) |
1ab256cb | 972 | { |
37ef52bb | 973 | int offset, i; |
1ab256cb RM |
974 | |
975 | /* Reset the major mode to Fundamental, together with all the | |
976 | things that depend on the major mode. | |
977 | default-major-mode is handled at a higher level. | |
978 | We ignore it here. */ | |
39eb03f1 PE |
979 | bset_major_mode (b, Qfundamental_mode); |
980 | bset_keymap (b, Qnil); | |
981 | bset_mode_name (b, QSFundamental); | |
982 | bset_minor_modes (b, Qnil); | |
3446af9c RS |
983 | |
984 | /* If the standard case table has been altered and invalidated, | |
985 | fix up its insides first. */ | |
986 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
987 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
988 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
989 | Fset_standard_case_table (Vascii_downcase_table); | |
990 | ||
39eb03f1 PE |
991 | bset_downcase_table (b, Vascii_downcase_table); |
992 | bset_upcase_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[0]); | |
993 | bset_case_canon_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[1]); | |
994 | bset_case_eqv_table (b, XCHAR_TABLE (Vascii_downcase_table)->extras[2]); | |
995 | bset_invisibility_spec (b, Qt); | |
3cb719bd | 996 | |
13de9290 | 997 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 998 | if (permanent_too) |
39eb03f1 | 999 | bset_local_var_alist (b, Qnil); |
3709505e SM |
1000 | else |
1001 | { | |
2f7a359d | 1002 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 1003 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 1004 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
1005 | { |
1006 | /* If permanent-local, keep it. */ | |
1007 | last = tmp; | |
1008 | if (EQ (prop, Qpermanent_local_hook)) | |
1009 | { | |
1010 | /* This is a partially permanent hook variable. | |
1011 | Preserve only the elements that want to be preserved. */ | |
1012 | Lisp_Object list, newlist; | |
1013 | list = XCDR (XCAR (tmp)); | |
1014 | if (!CONSP (list)) | |
1015 | newlist = list; | |
1016 | else | |
1017 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
1018 | { | |
1019 | Lisp_Object elt = XCAR (list); | |
1020 | /* Preserve element ELT if it's t, | |
1021 | if it is a function with a `permanent-local-hook' property, | |
1022 | or if it's not a symbol. */ | |
1023 | if (! SYMBOLP (elt) | |
1024 | || EQ (elt, Qt) | |
1025 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
1026 | newlist = Fcons (elt, newlist); | |
1027 | } | |
1028 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
1029 | } | |
1030 | } | |
1031 | /* Delete this local variable. */ | |
3709505e | 1032 | else if (NILP (last)) |
39eb03f1 | 1033 | bset_local_var_alist (b, XCDR (tmp)); |
3709505e SM |
1034 | else |
1035 | XSETCDR (last, XCDR (tmp)); | |
1036 | } | |
1037 | ||
7313acd0 | 1038 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 1039 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 1040 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 1041 | |
36429c89 | 1042 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 1043 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 1044 | { |
7313acd0 | 1045 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
1046 | if ((idx > 0 |
1047 | && (permanent_too | |
ce5b453a | 1048 | || buffer_permanent_local_flags[idx] == 0))) |
4ce60d2e | 1049 | set_per_buffer_value (b, offset, per_buffer_default (offset)); |
aab80822 | 1050 | } |
1ab256cb RM |
1051 | } |
1052 | ||
01050cb5 RM |
1053 | /* We split this away from generate-new-buffer, because rename-buffer |
1054 | and set-visited-file-name ought to be able to use this to really | |
1055 | rename the buffer properly. */ | |
1056 | ||
a7ca3326 | 1057 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 1058 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 1059 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
1060 | If there is no live buffer named NAME, then return NAME. |
1061 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 1062 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 1063 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
1064 | it is in the sequence to be tried) even if a buffer with that name exists. |
1065 | ||
1066 | If NAME begins with a space (i.e., a buffer that is not normally | |
1067 | visible to users), then if buffer NAME already exists a random number | |
1068 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 1069 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 1070 | { |
8e4fd1e1 | 1071 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
1072 | ptrdiff_t count; |
1073 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 1074 | |
b7826503 | 1075 | CHECK_STRING (name); |
1ab256cb | 1076 | |
6b61353c KH |
1077 | tem = Fstring_equal (name, ignore); |
1078 | if (!NILP (tem)) | |
1079 | return name; | |
1ab256cb | 1080 | tem = Fget_buffer (name); |
265a9e55 | 1081 | if (NILP (tem)) |
01050cb5 | 1082 | return name; |
1ab256cb | 1083 | |
8e4fd1e1 GM |
1084 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
1085 | { | |
1086 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 1087 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 1088 | (number, "-%"pI"d", |
a8290ec3 | 1089 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
1090 | tem = Fget_buffer (tem2); |
1091 | if (NILP (tem)) | |
1092 | return tem2; | |
1093 | } | |
1094 | else | |
1095 | tem2 = name; | |
1096 | ||
1ab256cb RM |
1097 | count = 1; |
1098 | while (1) | |
1099 | { | |
a8290ec3 DA |
1100 | gentemp = concat2 (tem2, make_formatted_string |
1101 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 1102 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
1103 | if (!NILP (tem)) |
1104 | return gentemp; | |
1ab256cb | 1105 | tem = Fget_buffer (gentemp); |
265a9e55 | 1106 | if (NILP (tem)) |
01050cb5 | 1107 | return gentemp; |
1ab256cb RM |
1108 | } |
1109 | } | |
1110 | ||
1111 | \f | |
a7ca3326 | 1112 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 1113 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
1114 | BUFFER defaults to the current buffer. |
1115 | Return nil if BUFFER has been killed. */) | |
5842a27b | 1116 | (register Lisp_Object buffer) |
1ab256cb | 1117 | { |
265a9e55 | 1118 | if (NILP (buffer)) |
4b4deea2 | 1119 | return BVAR (current_buffer, name); |
b7826503 | 1120 | CHECK_BUFFER (buffer); |
4b4deea2 | 1121 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
1122 | } |
1123 | ||
a7ca3326 | 1124 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
1125 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
1126 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 1127 | (register Lisp_Object buffer) |
1ab256cb | 1128 | { |
265a9e55 | 1129 | if (NILP (buffer)) |
4b4deea2 | 1130 | return BVAR (current_buffer, filename); |
b7826503 | 1131 | CHECK_BUFFER (buffer); |
4b4deea2 | 1132 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
1133 | } |
1134 | ||
336cd056 RS |
1135 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
1136 | 0, 1, 0, | |
7ee72033 | 1137 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
1138 | If BUFFER is not indirect, return nil. |
1139 | BUFFER defaults to the current buffer. */) | |
5842a27b | 1140 | (register Lisp_Object buffer) |
336cd056 RS |
1141 | { |
1142 | struct buffer *base; | |
1143 | Lisp_Object base_buffer; | |
1144 | ||
1145 | if (NILP (buffer)) | |
1146 | base = current_buffer->base_buffer; | |
1147 | else | |
1148 | { | |
b7826503 | 1149 | CHECK_BUFFER (buffer); |
336cd056 RS |
1150 | base = XBUFFER (buffer)->base_buffer; |
1151 | } | |
1152 | ||
1153 | if (! base) | |
1154 | return Qnil; | |
1155 | XSETBUFFER (base_buffer, base); | |
1156 | return base_buffer; | |
1157 | } | |
1158 | ||
a7ca3326 | 1159 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 1160 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
1161 | doc: /* Return the value of VARIABLE in BUFFER. |
1162 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 1163 | is the default binding of the variable. */) |
5842a27b | 1164 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
1165 | { |
1166 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
1167 | ||
1168 | if (EQ (result, Qunbound)) | |
1169 | xsignal1 (Qvoid_variable, variable); | |
1170 | ||
1171 | return result; | |
1172 | } | |
1173 | ||
1174 | ||
1175 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
1176 | locally unbound. */ | |
1177 | ||
1178 | Lisp_Object | |
1179 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
1180 | { |
1181 | register struct buffer *buf; | |
1182 | register Lisp_Object result; | |
ad97b375 | 1183 | struct Lisp_Symbol *sym; |
79aa712d | 1184 | |
5e2ad10b | 1185 | CHECK_SYMBOL (variable); |
ae69175b | 1186 | CHECK_BUFFER (buffer); |
79aa712d | 1187 | buf = XBUFFER (buffer); |
ce5b453a | 1188 | sym = XSYMBOL (variable); |
79aa712d | 1189 | |
ce5b453a SM |
1190 | start: |
1191 | switch (sym->redirect) | |
f0bac7de | 1192 | { |
ce5b453a SM |
1193 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
1194 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
1195 | case SYMBOL_LOCALIZED: | |
1196 | { /* Look in local_var_alist. */ | |
1197 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
1198 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 1199 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
1200 | if (!NILP (result)) |
1201 | { | |
1202 | if (blv->fwd) | |
1203 | { /* What binding is loaded right now? */ | |
1204 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 1205 | |
ce5b453a SM |
1206 | /* The value of the currently loaded binding is not |
1207 | stored in it, but rather in the realvalue slot. | |
1208 | Store that value into the binding it belongs to | |
1209 | in case that is the one we are about to use. */ | |
f0bac7de | 1210 | |
ce5b453a SM |
1211 | XSETCDR (current_alist_element, |
1212 | do_symval_forwarding (blv->fwd)); | |
1213 | } | |
1214 | /* Now get the (perhaps updated) value out of the binding. */ | |
1215 | result = XCDR (result); | |
1216 | } | |
1217 | else | |
1218 | result = Fdefault_value (variable); | |
1219 | break; | |
1220 | } | |
1221 | case SYMBOL_FORWARDED: | |
1222 | { | |
1223 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1224 | if (BUFFER_OBJFWDP (fwd)) | |
4ce60d2e | 1225 | result = per_buffer_value (buf, XBUFFER_OBJFWD (fwd)->offset); |
ce5b453a SM |
1226 | else |
1227 | result = Fdefault_value (variable); | |
1228 | break; | |
1229 | } | |
1088b922 | 1230 | default: emacs_abort (); |
f0bac7de | 1231 | } |
79aa712d | 1232 | |
5f2c76c6 | 1233 | return result; |
79aa712d RS |
1234 | } |
1235 | ||
e1688f54 | 1236 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1237 | buffer BUF. That is, don't include the variables maintained |
8a05d57a | 1238 | in special slots in the buffer object. |
37ef52bb | 1239 | If not CLONE, replace elements of the form (VAR . unbound) |
8a05d57a | 1240 | by VAR. */ |
e1688f54 RS |
1241 | |
1242 | static Lisp_Object | |
37ef52bb | 1243 | buffer_lisp_local_variables (struct buffer *buf, bool clone) |
e1688f54 RS |
1244 | { |
1245 | Lisp_Object result = Qnil; | |
37ef52bb | 1246 | Lisp_Object tail; |
4b4deea2 | 1247 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1248 | { |
1249 | Lisp_Object val, elt; | |
1250 | ||
1251 | elt = XCAR (tail); | |
1252 | ||
1253 | /* Reference each variable in the alist in buf. | |
1254 | If inquiring about the current buffer, this gets the current values, | |
1255 | so store them into the alist so the alist is up to date. | |
1256 | If inquiring about some other buffer, this swaps out any values | |
1257 | for that buffer, making the alist up to date automatically. */ | |
1258 | val = find_symbol_value (XCAR (elt)); | |
1259 | /* Use the current buffer value only if buf is the current buffer. */ | |
1260 | if (buf != current_buffer) | |
1261 | val = XCDR (elt); | |
1262 | ||
8a05d57a | 1263 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1264 | ? XCAR (elt) |
1265 | : Fcons (XCAR (elt), val), | |
1266 | result); | |
e1688f54 RS |
1267 | } |
1268 | ||
1269 | return result; | |
1270 | } | |
1271 | ||
1ab256cb | 1272 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1273 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1274 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1275 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1276 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1277 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1278 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1279 | (register Lisp_Object buffer) |
1ab256cb RM |
1280 | { |
1281 | register struct buffer *buf; | |
553defa4 | 1282 | register Lisp_Object result; |
1ab256cb | 1283 | |
265a9e55 | 1284 | if (NILP (buffer)) |
1ab256cb RM |
1285 | buf = current_buffer; |
1286 | else | |
1287 | { | |
b7826503 | 1288 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1289 | buf = XBUFFER (buffer); |
1290 | } | |
1291 | ||
8a05d57a | 1292 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1293 | |
1ab256cb RM |
1294 | /* Add on all the variables stored in special slots. */ |
1295 | { | |
7c02e886 | 1296 | int offset, idx; |
1ab256cb | 1297 | |
52b852c7 | 1298 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1299 | { |
7313acd0 GM |
1300 | idx = PER_BUFFER_IDX (offset); |
1301 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1302 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1303 | { |
1304 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
4ce60d2e | 1305 | Lisp_Object val = per_buffer_value (buf, offset); |
0992bd9c CY |
1306 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), |
1307 | result); | |
1308 | } | |
1ab256cb RM |
1309 | } |
1310 | } | |
553defa4 RS |
1311 | |
1312 | return result; | |
1ab256cb | 1313 | } |
1ab256cb | 1314 | \f |
a7ca3326 | 1315 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1316 | 0, 1, 0, |
7ee72033 MB |
1317 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1318 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1319 | (register Lisp_Object buffer) |
1ab256cb RM |
1320 | { |
1321 | register struct buffer *buf; | |
265a9e55 | 1322 | if (NILP (buffer)) |
1ab256cb RM |
1323 | buf = current_buffer; |
1324 | else | |
1325 | { | |
b7826503 | 1326 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1327 | buf = XBUFFER (buffer); |
1328 | } | |
1329 | ||
336cd056 | 1330 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1331 | } |
1332 | ||
a7ca3326 | 1333 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1334 | 1, 1, 0, |
7ee72033 MB |
1335 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1336 | A non-nil FLAG means mark the buffer modified. */) | |
37ef52bb | 1337 | (Lisp_Object flag) |
1ab256cb | 1338 | { |
37ef52bb | 1339 | Lisp_Object fn, buffer, window; |
1ab256cb RM |
1340 | |
1341 | #ifdef CLASH_DETECTION | |
1342 | /* If buffer becoming modified, lock the file. | |
1343 | If buffer becoming unmodified, unlock the file. */ | |
1344 | ||
4b4deea2 | 1345 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1346 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1347 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1348 | { |
37ef52bb | 1349 | bool already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1350 | if (!already && !NILP (flag)) |
1ab256cb | 1351 | lock_file (fn); |
265a9e55 | 1352 | else if (already && NILP (flag)) |
1ab256cb RM |
1353 | unlock_file (fn); |
1354 | } | |
1355 | #endif /* CLASH_DETECTION */ | |
1356 | ||
0b5397c2 SM |
1357 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1358 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1359 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1360 | modify SAVE_MODIFF to affect one, we may affect the other | |
1361 | as well. | |
1362 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1363 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1364 | recent-auto-save-p from t to nil. | |
1365 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1366 | we risk changing recent-auto-save-p from nil to t. */ | |
1367 | SAVE_MODIFF = (NILP (flag) | |
1368 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1369 | ? MODIFF | |
1370 | /* Let's try to preserve recent-auto-save-p. */ | |
1371 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1372 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1373 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1374 | or increase MODIFF. */ | |
1375 | : MODIFF++); | |
177c0ea7 | 1376 | |
8ec01c70 GM |
1377 | /* Set update_mode_lines only if buffer is displayed in some window. |
1378 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1379 | state by recording/restoring the state around blocks of code. | |
1380 | Setting update_mode_lines makes redisplay consider all windows | |
1381 | (on all frames). Stealth fontification of buffers not displayed | |
1382 | would incur additional redisplay costs if we'd set | |
1383 | update_modes_lines unconditionally. | |
1384 | ||
1385 | Ideally, I think there should be another mechanism for fontifying | |
1386 | buffers without "modifying" buffers, or redisplay should be | |
1387 | smarter about updating the `*' in mode lines. --gerd */ | |
1388 | XSETBUFFER (buffer, current_buffer); | |
1389 | window = Fget_buffer_window (buffer, Qt); | |
1390 | if (WINDOWP (window)) | |
d57b83b3 GM |
1391 | { |
1392 | ++update_mode_lines; | |
1393 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1394 | } | |
177c0ea7 | 1395 | |
1ab256cb RM |
1396 | return flag; |
1397 | } | |
1398 | ||
a8c21b48 GM |
1399 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1400 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1401 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1402 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1403 | state of the current buffer. Use with care. */) |
5842a27b | 1404 | (Lisp_Object flag) |
a8c21b48 GM |
1405 | { |
1406 | #ifdef CLASH_DETECTION | |
1407 | Lisp_Object fn; | |
177c0ea7 | 1408 | |
a8c21b48 GM |
1409 | /* If buffer becoming modified, lock the file. |
1410 | If buffer becoming unmodified, unlock the file. */ | |
1411 | ||
4b4deea2 | 1412 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1413 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1414 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 | 1415 | { |
37ef52bb | 1416 | bool already = SAVE_MODIFF < MODIFF; |
a8c21b48 GM |
1417 | if (!already && !NILP (flag)) |
1418 | lock_file (fn); | |
1419 | else if (already && NILP (flag)) | |
1420 | unlock_file (fn); | |
1421 | } | |
1422 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1423 | |
a8c21b48 GM |
1424 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1425 | return flag; | |
1426 | } | |
1427 | ||
1ab256cb | 1428 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1429 | 0, 1, 0, |
7ee72033 | 1430 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1431 | Each buffer has a tick counter which is incremented each time the |
1432 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1433 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1434 | (register Lisp_Object buffer) |
1ab256cb RM |
1435 | { |
1436 | register struct buffer *buf; | |
265a9e55 | 1437 | if (NILP (buffer)) |
1ab256cb RM |
1438 | buf = current_buffer; |
1439 | else | |
1440 | { | |
b7826503 | 1441 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1442 | buf = XBUFFER (buffer); |
1443 | } | |
1444 | ||
1445 | return make_number (BUF_MODIFF (buf)); | |
1446 | } | |
3e145152 CY |
1447 | |
1448 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1449 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1450 | doc: /* Return BUFFER's character-change tick counter. | |
1451 | Each buffer has a character-change tick counter, which is set to the | |
1452 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1453 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1454 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1455 | you can tell whether a character change occurred in that buffer in |
1456 | between these calls. No argument or nil as argument means use current | |
1457 | buffer as BUFFER. */) | |
5842a27b | 1458 | (register Lisp_Object buffer) |
3e145152 CY |
1459 | { |
1460 | register struct buffer *buf; | |
1461 | if (NILP (buffer)) | |
1462 | buf = current_buffer; | |
1463 | else | |
1464 | { | |
1465 | CHECK_BUFFER (buffer); | |
1466 | buf = XBUFFER (buffer); | |
1467 | } | |
1468 | ||
1469 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1470 | } | |
1ab256cb | 1471 | \f |
01050cb5 | 1472 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1473 | "(list (read-string \"Rename buffer (to new name): \" \ |
1474 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1475 | current-prefix-arg)", | |
7ee72033 | 1476 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1477 | If second arg UNIQUE is nil or omitted, it is an error if a |
1478 | buffer named NEWNAME already exists. | |
1479 | If UNIQUE is non-nil, come up with a new name using | |
1480 | `generate-new-buffer-name'. | |
1481 | Interactively, you can set UNIQUE with a prefix argument. | |
1482 | We return the name we actually gave the buffer. | |
7ee72033 | 1483 | This does not change the name of the visited file (if any). */) |
5842a27b | 1484 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1485 | { |
1486 | register Lisp_Object tem, buf; | |
1487 | ||
b7826503 | 1488 | CHECK_STRING (newname); |
d59698c4 | 1489 | |
d5db4077 | 1490 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1491 | error ("Empty string is invalid as a buffer name"); |
1492 | ||
489c043a | 1493 | tem = Fget_buffer (newname); |
265a9e55 | 1494 | if (!NILP (tem)) |
01050cb5 | 1495 | { |
8801a864 KR |
1496 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1497 | rename the buffer automatically so you can create another | |
1498 | with the original name. It makes UNIQUE equivalent to | |
1499 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1500 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1501 | return BVAR (current_buffer, name); |
3bd779aa | 1502 | if (!NILP (unique)) |
4b4deea2 | 1503 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1504 | else |
d5db4077 | 1505 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1506 | } |
1ab256cb | 1507 | |
39eb03f1 | 1508 | bset_name (current_buffer, newname); |
76f590d7 JB |
1509 | |
1510 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1511 | any windows displaying current_buffer will stay unchanged. */ | |
1512 | update_mode_lines++; | |
1513 | ||
67180c6a | 1514 | XSETBUFFER (buf, current_buffer); |
489c043a | 1515 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1516 | if (NILP (BVAR (current_buffer, filename)) |
1517 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1518 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1519 | |
1520 | /* Run buffer-list-update-hook. */ | |
1521 | if (!NILP (Vrun_hooks)) | |
1522 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1523 | ||
fb5eba9c | 1524 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1525 | return BVAR (current_buffer, name); |
1ab256cb RM |
1526 | } |
1527 | ||
a7ca3326 | 1528 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1529 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1530 | Buffers not visible in windows are preferred to visible buffers, unless |
1531 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1532 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1533 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1534 | frame's buffer list. | |
1535 | ||
1536 | The buffer is found by scanning the selected or specified frame's buffer | |
1537 | list first, followed by the list of all buffers. If no other buffer | |
1538 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1539 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1540 | { |
9397e56f MR |
1541 | Lisp_Object tail, buf, pred; |
1542 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1543 | |
773fbdb9 | 1544 | if (NILP (frame)) |
9ba9623d | 1545 | frame = selected_frame; |
773fbdb9 | 1546 | |
d234d13e JL |
1547 | CHECK_FRAME (frame); |
1548 | ||
773fbdb9 | 1549 | pred = frame_buffer_predicate (frame); |
9397e56f | 1550 | /* Consider buffers that have been seen in the frame first. */ |
e69b0960 | 1551 | tail = XFRAME (frame)->buffer_list; |
9397e56f | 1552 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1553 | { |
9397e56f MR |
1554 | buf = XCAR (tail); |
1555 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
e578f381 | 1556 | && BUFFER_LIVE_P (XBUFFER (buf)) |
9397e56f MR |
1557 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') |
1558 | /* If the frame has a buffer_predicate, disregard buffers that | |
1559 | don't fit the predicate. */ | |
1560 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1561 | { | |
1562 | if (!NILP (visible_ok) | |
1563 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1564 | return buf; | |
1565 | else if (NILP (notsogood)) | |
1566 | notsogood = buf; | |
1567 | } | |
7962a441 | 1568 | } |
7962a441 | 1569 | |
9397e56f MR |
1570 | /* Consider alist of all buffers next. */ |
1571 | tail = Vbuffer_alist; | |
6d70a280 | 1572 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1573 | { |
6d70a280 | 1574 | buf = Fcdr (XCAR (tail)); |
9397e56f | 1575 | if (BUFFERP (buf) && !EQ (buf, buffer) |
e578f381 | 1576 | && BUFFER_LIVE_P (XBUFFER (buf)) |
9397e56f MR |
1577 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') |
1578 | /* If the frame has a buffer_predicate, disregard buffers that | |
1579 | don't fit the predicate. */ | |
1580 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1581 | { | |
1582 | if (!NILP (visible_ok) | |
1583 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1584 | return buf; | |
1585 | else if (NILP (notsogood)) | |
1586 | notsogood = buf; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | if (!NILP (notsogood)) | |
1591 | return notsogood; | |
1592 | else | |
1593 | { | |
1594 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1595 | if (NILP (buf)) |
04ae1b48 | 1596 | { |
9397e56f MR |
1597 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1598 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1599 | } |
9397e56f MR |
1600 | return buf; |
1601 | } | |
1602 | } | |
04ae1b48 | 1603 | |
9397e56f MR |
1604 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1605 | pay attention to any frame-local buffer lists, doesn't care about | |
1606 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1607 | ||
1608 | Lisp_Object | |
1609 | other_buffer_safely (Lisp_Object buffer) | |
1610 | { | |
9397e56f MR |
1611 | Lisp_Object tail, buf; |
1612 | ||
1613 | tail = Vbuffer_alist; | |
1614 | for (; CONSP (tail); tail = XCDR (tail)) | |
1615 | { | |
1616 | buf = Fcdr (XCAR (tail)); | |
1617 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
e578f381 | 1618 | && BUFFER_LIVE_P (XBUFFER (buf)) |
9397e56f | 1619 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) |
1ab256cb | 1620 | return buf; |
1ab256cb | 1621 | } |
9397e56f | 1622 | |
dba1a30a GM |
1623 | buf = Fget_buffer (build_string ("*scratch*")); |
1624 | if (NILP (buf)) | |
1625 | { | |
1626 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1627 | Fset_buffer_major_mode (buf); | |
1628 | } | |
9397e56f | 1629 | |
89132f25 | 1630 | return buf; |
1ab256cb RM |
1631 | } |
1632 | \f | |
a7ca3326 | 1633 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1634 | 0, 1, "", |
7ee72033 MB |
1635 | doc: /* Start keeping undo information for buffer BUFFER. |
1636 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1637 | (register Lisp_Object buffer) |
1ab256cb | 1638 | { |
ffd56f97 | 1639 | Lisp_Object real_buffer; |
1ab256cb | 1640 | |
ffd56f97 | 1641 | if (NILP (buffer)) |
67180c6a | 1642 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1643 | else |
1644 | { | |
ffd56f97 JB |
1645 | real_buffer = Fget_buffer (buffer); |
1646 | if (NILP (real_buffer)) | |
1647 | nsberror (buffer); | |
1ab256cb RM |
1648 | } |
1649 | ||
4b4deea2 | 1650 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
39eb03f1 | 1651 | bset_undo_list (XBUFFER (real_buffer), Qnil); |
1ab256cb RM |
1652 | |
1653 | return Qnil; | |
1654 | } | |
1655 | ||
9cd47b72 DA |
1656 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1657 | ||
37ef52bb | 1658 | void |
9cd47b72 DA |
1659 | compact_buffer (struct buffer *buffer) |
1660 | { | |
9928463d DA |
1661 | /* Verify indirection counters. */ |
1662 | if (buffer->base_buffer) | |
1663 | { | |
1664 | eassert (buffer->indirections == -1); | |
1665 | eassert (buffer->base_buffer->indirections > 0); | |
1666 | } | |
1667 | else | |
1668 | eassert (buffer->indirections >= 0); | |
1669 | ||
9cd47b72 DA |
1670 | /* Skip dead buffers, indirect buffers and buffers |
1671 | which aren't changed since last compaction. */ | |
e34f7f79 | 1672 | if (!NILP (buffer->INTERNAL_FIELD (name)) |
9cd47b72 DA |
1673 | && (buffer->base_buffer == NULL) |
1674 | && (buffer->text->compact != buffer->text->modiff)) | |
1675 | { | |
1676 | /* If a buffer's undo list is Qt, that means that undo is | |
1677 | turned off in that buffer. Calling truncate_undo_list on | |
1678 | Qt tends to return NULL, which effectively turns undo back on. | |
1679 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1680 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1681 | truncate_undo_list (buffer); |
1682 | ||
1683 | /* Shrink buffer gaps. */ | |
1684 | if (!buffer->text->inhibit_shrinking) | |
1685 | { | |
1686 | /* If a buffer's gap size is more than 10% of the buffer | |
1687 | size, or larger than 2000 bytes, then shrink it | |
1688 | accordingly. Keep a minimum size of 20 bytes. */ | |
1689 | int size = min (2000, max (20, (buffer->text->z_byte / 10))); | |
1690 | ||
1691 | if (buffer->text->gap_size > size) | |
1692 | { | |
1693 | struct buffer *save_current = current_buffer; | |
1694 | current_buffer = buffer; | |
1695 | make_gap (-(buffer->text->gap_size - size)); | |
1696 | current_buffer = save_current; | |
1697 | } | |
1698 | } | |
1699 | buffer->text->compact = buffer->text->modiff; | |
9cd47b72 | 1700 | } |
9cd47b72 DA |
1701 | } |
1702 | ||
a7ca3326 | 1703 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1704 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1705 | The argument may be a buffer or the name of an existing buffer. |
1706 | Argument nil or omitted means kill the current buffer. Return t if the | |
1707 | buffer is actually killed, nil otherwise. | |
1708 | ||
b7e8d081 MR |
1709 | The functions in `kill-buffer-query-functions' are called with the |
1710 | buffer to be killed as the current buffer. If any of them returns nil, | |
1711 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1712 | buffer is actually killed. The buffer being killed will be current | |
1713 | while the hook is running. Functions called by any of these hooks are | |
1714 | supposed to not change the current buffer. | |
018ba359 PJ |
1715 | |
1716 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1717 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1718 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1719 | (Lisp_Object buffer_or_name) |
1ab256cb | 1720 | { |
c8804c4f | 1721 | Lisp_Object buffer; |
1ab256cb RM |
1722 | register struct buffer *b; |
1723 | register Lisp_Object tem; | |
1724 | register struct Lisp_Marker *m; | |
6af718a4 | 1725 | struct gcpro gcpro1; |
1ab256cb | 1726 | |
c8804c4f MR |
1727 | if (NILP (buffer_or_name)) |
1728 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1729 | else |
c8804c4f MR |
1730 | buffer = Fget_buffer (buffer_or_name); |
1731 | if (NILP (buffer)) | |
1732 | nsberror (buffer_or_name); | |
1ab256cb | 1733 | |
c8804c4f | 1734 | b = XBUFFER (buffer); |
1ab256cb | 1735 | |
4a4a9db5 | 1736 | /* Avoid trouble for buffer already dead. */ |
e578f381 | 1737 | if (!BUFFER_LIVE_P (b)) |
4a4a9db5 KH |
1738 | return Qnil; |
1739 | ||
1ab256cb | 1740 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1741 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1742 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1743 | { |
c8804c4f | 1744 | GCPRO1 (buffer); |
5c4930b0 | 1745 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1746 | BVAR (b, name), make_number (0))); |
1ab256cb | 1747 | UNGCPRO; |
265a9e55 | 1748 | if (NILP (tem)) |
1ab256cb RM |
1749 | return Qnil; |
1750 | } | |
1751 | ||
dcdffbf6 | 1752 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1753 | { |
d311d28c | 1754 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1755 | Lisp_Object arglist[1]; |
1ab256cb RM |
1756 | |
1757 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1758 | set_buffer_internal (b); | |
dcdffbf6 RS |
1759 | |
1760 | /* First run the query functions; if any query is answered no, | |
1761 | don't kill the buffer. */ | |
5b20caf0 | 1762 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1763 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1764 | if (NILP (tem)) | |
5b20caf0 | 1765 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1766 | |
1767 | /* Then run the hooks. */ | |
f1597a3a | 1768 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1769 | unbind_to (count, Qnil); |
1770 | } | |
1771 | ||
b7e8d081 | 1772 | /* If the hooks have killed the buffer, exit now. */ |
e578f381 | 1773 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1774 | return Qt; |
1775 | ||
1ab256cb RM |
1776 | /* We have no more questions to ask. Verify that it is valid |
1777 | to kill the buffer. This must be done after the questions | |
1778 | since anything can happen within do_yes_or_no_p. */ | |
1779 | ||
1780 | /* Don't kill the minibuffer now current. */ | |
d3d50620 | 1781 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1782 | return Qnil; |
1783 | ||
9928463d DA |
1784 | /* When we kill an ordinary buffer which shares it's buffer text |
1785 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1786 | We do it at this stage so nothing terrible happens if they |
1787 | ask questions or their hooks get errors. */ | |
9928463d | 1788 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1789 | { |
1790 | struct buffer *other; | |
1791 | ||
c8804c4f | 1792 | GCPRO1 (buffer); |
336cd056 | 1793 | |
52b852c7 | 1794 | FOR_EACH_BUFFER (other) |
d17337e5 | 1795 | if (other->base_buffer == b) |
336cd056 | 1796 | { |
8f54f30a PE |
1797 | Lisp_Object buf; |
1798 | XSETBUFFER (buf, other); | |
1799 | Fkill_buffer (buf); | |
336cd056 RS |
1800 | } |
1801 | ||
1802 | UNGCPRO; | |
b7e8d081 MR |
1803 | |
1804 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
e578f381 | 1805 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1806 | return Qt; |
336cd056 | 1807 | } |
177c0ea7 | 1808 | |
56e2e794 MR |
1809 | /* Run replace_buffer_in_windows before making another buffer current |
1810 | since set-window-buffer-start-and-point will refuse to make another | |
1811 | buffer current if the selected window does not show the current | |
1812 | buffer. (Bug#10114) */ | |
1813 | replace_buffer_in_windows (buffer); | |
1814 | ||
b7e8d081 | 1815 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
e578f381 | 1816 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1817 | return Qt; |
1818 | ||
1819 | /* Make this buffer not be current. Exit if it is the sole visible | |
1820 | buffer. */ | |
1ab256cb RM |
1821 | if (b == current_buffer) |
1822 | { | |
c8804c4f | 1823 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1824 | Fset_buffer (tem); |
1825 | if (b == current_buffer) | |
1826 | return Qnil; | |
1827 | } | |
1828 | ||
b7e8d081 MR |
1829 | /* If the buffer now current is shown in the minibuffer and our buffer |
1830 | is the sole other buffer give up. */ | |
77270fac | 1831 | XSETBUFFER (tem, current_buffer); |
d3d50620 | 1832 | if (EQ (tem, XWINDOW (minibuf_window)->buffer) |
b7e8d081 MR |
1833 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1834 | return Qnil; | |
77270fac | 1835 | |
1ab256cb RM |
1836 | /* Now there is no question: we can kill the buffer. */ |
1837 | ||
1838 | #ifdef CLASH_DETECTION | |
1839 | /* Unlock this buffer's file, if it is locked. */ | |
1840 | unlock_buffer (b); | |
1841 | #endif /* CLASH_DETECTION */ | |
1842 | ||
c8804c4f MR |
1843 | GCPRO1 (buffer); |
1844 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1845 | UNGCPRO; |
1846 | ||
b7e8d081 MR |
1847 | /* Killing buffer processes may run sentinels which may have killed |
1848 | our buffer. */ | |
e578f381 | 1849 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 | 1850 | return Qt; |
49da74e6 | 1851 | |
9397e56f MR |
1852 | /* These may run Lisp code and into infinite loops (if someone |
1853 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1854 | frames_discard_buffer (buffer); |
1855 | ||
b93fb365 | 1856 | clear_charpos_cache (b); |
1ab256cb RM |
1857 | |
1858 | tem = Vinhibit_quit; | |
1859 | Vinhibit_quit = Qt; | |
9397e56f | 1860 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1861 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1862 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1863 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1864 | Vinhibit_quit = tem; |
1865 | ||
9cf712eb RS |
1866 | /* Delete any auto-save file, if we saved it in this session. |
1867 | But not if the buffer is modified. */ | |
4b4deea2 | 1868 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1869 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1870 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1871 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1872 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1873 | { |
8f54f30a PE |
1874 | Lisp_Object delete; |
1875 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1876 | if (! NILP (delete)) | |
4b4deea2 | 1877 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1878 | } |
1879 | ||
b7e8d081 | 1880 | /* Deleting an auto-save file could have killed our buffer. */ |
e578f381 | 1881 | if (!BUFFER_LIVE_P (b)) |
b7e8d081 MR |
1882 | return Qt; |
1883 | ||
4a4a9db5 KH |
1884 | if (b->base_buffer) |
1885 | { | |
1886 | /* Unchain all markers that belong to this indirect buffer. | |
1887 | Don't unchain the markers that belong to the base buffer | |
1888 | or its other indirect buffers. */ | |
65745fad | 1889 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1890 | { |
65745fad | 1891 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1892 | if (m->buffer == b) |
65745fad SM |
1893 | unchain_marker (m); |
1894 | m = next; | |
4a4a9db5 KH |
1895 | } |
1896 | } | |
1897 | else | |
1ab256cb | 1898 | { |
4a4a9db5 | 1899 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1900 | and leave them pointing nowhere. */ |
65745fad | 1901 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1902 | { |
65745fad | 1903 | struct Lisp_Marker *next = m->next; |
336cd056 | 1904 | m->buffer = 0; |
65745fad SM |
1905 | m->next = NULL; |
1906 | m = next; | |
336cd056 | 1907 | } |
65745fad | 1908 | BUF_MARKERS (b) = NULL; |
0c94c8d6 | 1909 | set_buffer_intervals (b, NULL); |
336cd056 RS |
1910 | |
1911 | /* Perhaps we should explicitly free the interval tree here... */ | |
1912 | } | |
33f7013e | 1913 | |
2f3f993b RS |
1914 | /* Reset the local variables, so that this buffer's local values |
1915 | won't be protected from GC. They would be protected | |
e4769531 | 1916 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1917 | This gets rid of them for certain. */ |
1918 | swap_out_buffer_local_variables (b); | |
13de9290 | 1919 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1920 | |
39eb03f1 | 1921 | bset_name (b, Qnil); |
336cd056 | 1922 | |
9ac0d9e0 | 1923 | BLOCK_INPUT; |
04e9897c DA |
1924 | if (b->base_buffer) |
1925 | { | |
1926 | /* Notify our base buffer that we don't share the text anymore. */ | |
1927 | eassert (b->indirections == -1); | |
1928 | b->base_buffer->indirections--; | |
1929 | eassert (b->base_buffer->indirections >= 0); | |
1930 | } | |
1931 | else | |
1932 | /* No one shares our buffer text, can free it. */ | |
b86af064 | 1933 | free_buffer_text (b); |
336cd056 | 1934 | |
28e969dd JB |
1935 | if (b->newline_cache) |
1936 | { | |
1937 | free_region_cache (b->newline_cache); | |
1938 | b->newline_cache = 0; | |
1939 | } | |
1940 | if (b->width_run_cache) | |
1941 | { | |
1942 | free_region_cache (b->width_run_cache); | |
1943 | b->width_run_cache = 0; | |
1944 | } | |
39eb03f1 | 1945 | bset_width_table (b, Qnil); |
9ac0d9e0 | 1946 | UNBLOCK_INPUT; |
39eb03f1 | 1947 | bset_undo_list (b, Qnil); |
1ab256cb | 1948 | |
9397e56f MR |
1949 | /* Run buffer-list-update-hook. */ |
1950 | if (!NILP (Vrun_hooks)) | |
1951 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1952 | ||
1ab256cb RM |
1953 | return Qt; |
1954 | } | |
1955 | \f | |
9397e56f MR |
1956 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1957 | we do this each time BUFFER is selected visibly, the more recently | |
1958 | selected buffers are always closer to the front of those lists. This | |
1959 | means that other_buffer is more likely to choose a relevant buffer. | |
1960 | ||
1961 | Note that this moves BUFFER to the front of the buffer lists of the | |
1962 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1963 | shown in the selected frame, consider the present behavior a feature. | |
1964 | `select-window' gets this right since it shows BUFFER in the selected | |
1965 | window when calling us. */ | |
1ab256cb | 1966 | |
01136e9b | 1967 | void |
9397e56f | 1968 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1969 | { |
4475bec4 | 1970 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1971 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1972 | |
9397e56f | 1973 | CHECK_BUFFER (buffer); |
1ab256cb | 1974 | |
9397e56f MR |
1975 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1976 | Don't allow quitting since this might leave the buffer list in an | |
1977 | inconsistent state. */ | |
1978 | tem = Vinhibit_quit; | |
1979 | Vinhibit_quit = Qt; | |
1980 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1981 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1982 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1983 | XSETCDR (aelt_cons, Vbuffer_alist); |
1984 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1985 | Vinhibit_quit = tem; |
1ab256cb | 1986 | |
9397e56f | 1987 | /* Update buffer list of selected frame. */ |
f00af5b1 PE |
1988 | fset_buffer_list (f, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
1989 | fset_buried_buffer_list (f, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 1990 | |
9397e56f MR |
1991 | /* Run buffer-list-update-hook. */ |
1992 | if (!NILP (Vrun_hooks)) | |
1993 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1994 | } | |
7962a441 | 1995 | |
7962a441 | 1996 | |
e4ed06f1 CY |
1997 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1998 | buffer is killed. For the selected frame's buffer list this moves | |
1999 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 2000 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 2001 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 2002 | |
e4ed06f1 CY |
2003 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
2004 | 1, 1, 0, | |
2005 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
2006 | (Lisp_Object buffer) |
2007 | { | |
4475bec4 | 2008 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 2009 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 2010 | |
9397e56f | 2011 | CHECK_BUFFER (buffer); |
177c0ea7 | 2012 | |
9397e56f MR |
2013 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
2014 | Don't allow quitting since this might leave the buffer list in an | |
2015 | inconsistent state. */ | |
2016 | tem = Vinhibit_quit; | |
2017 | Vinhibit_quit = Qt; | |
2018 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 2019 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 2020 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
2021 | XSETCDR (aelt_cons, Qnil); |
2022 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
2023 | Vinhibit_quit = tem; |
2024 | ||
2025 | /* Update buffer lists of selected frame. */ | |
f00af5b1 PE |
2026 | fset_buffer_list (f, Fdelq (buffer, f->buffer_list)); |
2027 | fset_buried_buffer_list | |
2028 | (f, Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); | |
9397e56f MR |
2029 | |
2030 | /* Run buffer-list-update-hook. */ | |
2031 | if (!NILP (Vrun_hooks)) | |
2032 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
2033 | ||
e4ed06f1 | 2034 | return Qnil; |
1ab256cb RM |
2035 | } |
2036 | ||
a9ee7a59 | 2037 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 2038 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 2039 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 2040 | according to `default-major-mode'. |
018ba359 | 2041 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 2042 | the current buffer's major mode. */) |
5842a27b | 2043 | (Lisp_Object buffer) |
a9ee7a59 | 2044 | { |
d311d28c | 2045 | ptrdiff_t count; |
a9ee7a59 KH |
2046 | Lisp_Object function; |
2047 | ||
ea4fddd8 JB |
2048 | CHECK_BUFFER (buffer); |
2049 | ||
e578f381 | 2050 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
4f2daf31 DA |
2051 | error ("Attempt to set major mode for a dead buffer"); |
2052 | ||
2053 | if (strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
2054 | function = find_symbol_value (intern ("initial-major-mode")); |
2055 | else | |
2056 | { | |
4b4deea2 | 2057 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 2058 | if (NILP (function) |
4b4deea2 TT |
2059 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
2060 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 2061 | } |
177c0ea7 | 2062 | |
48265e61 DL |
2063 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
2064 | return Qnil; | |
2065 | ||
aed13378 | 2066 | count = SPECPDL_INDEX (); |
a9ee7a59 | 2067 | |
48265e61 DL |
2068 | /* To select a nonfundamental mode, |
2069 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
2070 | |
2071 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
2072 | ||
a2428fa2 | 2073 | Fset_buffer (buffer); |
48265e61 | 2074 | call0 (function); |
a9ee7a59 KH |
2075 | |
2076 | return unbind_to (count, Qnil); | |
2077 | } | |
2078 | ||
a7ca3326 | 2079 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 2080 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 2081 | (void) |
1ab256cb RM |
2082 | { |
2083 | register Lisp_Object buf; | |
67180c6a | 2084 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
2085 | return buf; |
2086 | } | |
c7aa5005 KH |
2087 | |
2088 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
2089 | This is used by redisplay. */ | |
2090 | ||
2091 | void | |
d3da34e0 | 2092 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
2093 | { |
2094 | register struct buffer *old_buf; | |
ce5b453a | 2095 | register Lisp_Object tail; |
c7aa5005 | 2096 | |
b86af064 | 2097 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 2098 | if (b->text->beg == NULL) |
b86af064 GM |
2099 | enlarge_buffer_text (b, 0); |
2100 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 2101 | |
c7aa5005 KH |
2102 | if (current_buffer == b) |
2103 | return; | |
2104 | ||
1ab256cb RM |
2105 | old_buf = current_buffer; |
2106 | current_buffer = b; | |
2107 | last_known_column_point = -1; /* invalidate indentation cache */ | |
2108 | ||
336cd056 RS |
2109 | if (old_buf) |
2110 | { | |
2111 | /* Put the undo list back in the base buffer, so that it appears | |
2112 | that an indirect buffer shares the undo list of its base. */ | |
2113 | if (old_buf->base_buffer) | |
39eb03f1 | 2114 | bset_undo_list (old_buf->base_buffer, BVAR (old_buf, undo_list)); |
336cd056 RS |
2115 | |
2116 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
2117 | when it is not current, update them now. */ | |
cffc6f3b | 2118 | record_buffer_markers (old_buf); |
336cd056 RS |
2119 | } |
2120 | ||
2121 | /* Get the undo list from the base buffer, so that it appears | |
2122 | that an indirect buffer shares the undo list of its base. */ | |
2123 | if (b->base_buffer) | |
39eb03f1 | 2124 | bset_undo_list (b, BVAR (b->base_buffer, undo_list)); |
336cd056 RS |
2125 | |
2126 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2127 | when it is not current, fetch them now. */ | |
cffc6f3b | 2128 | fetch_buffer_markers (b); |
336cd056 | 2129 | |
1ab256cb RM |
2130 | /* Look down buffer's list of local Lisp variables |
2131 | to find and update any that forward into C variables. */ | |
2132 | ||
ce5b453a | 2133 | do |
1ab256cb | 2134 | { |
4b4deea2 | 2135 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
2136 | { |
2137 | Lisp_Object var = XCAR (XCAR (tail)); | |
2138 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
2139 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
2140 | && SYMBOL_BLV (sym)->fwd) | |
2141 | /* Just reference the variable | |
2142 | to cause it to become set for this buffer. */ | |
2143 | Fsymbol_value (var); | |
2144 | } | |
1ab256cb | 2145 | } |
1ab256cb | 2146 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 2147 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
2148 | } |
2149 | ||
336cd056 | 2150 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 2151 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
2152 | |
2153 | void | |
d3da34e0 | 2154 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
2155 | { |
2156 | register struct buffer *old_buf; | |
2157 | ||
2158 | if (current_buffer == b) | |
2159 | return; | |
2160 | ||
2161 | old_buf = current_buffer; | |
2162 | current_buffer = b; | |
2163 | ||
cffc6f3b CY |
2164 | /* If the old current buffer has markers to record PT, BEGV and ZV |
2165 | when it is not current, update them now. */ | |
2166 | record_buffer_markers (old_buf); | |
336cd056 RS |
2167 | |
2168 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2169 | when it is not current, fetch them now. */ | |
cffc6f3b | 2170 | fetch_buffer_markers (b); |
336cd056 RS |
2171 | } |
2172 | ||
a7ca3326 | 2173 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
2174 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
2175 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
2176 | also `save-excursion' when you want to make a buffer current | |
2177 | temporarily. This function does not display the buffer, so its effect | |
2178 | ends when the current command terminates. Use `switch-to-buffer' or | |
2179 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 2180 | (register Lisp_Object buffer_or_name) |
1ab256cb | 2181 | { |
c8804c4f MR |
2182 | register Lisp_Object buffer; |
2183 | buffer = Fget_buffer (buffer_or_name); | |
2184 | if (NILP (buffer)) | |
2185 | nsberror (buffer_or_name); | |
e578f381 | 2186 | if (!BUFFER_LIVE_P (XBUFFER (buffer))) |
1ab256cb | 2187 | error ("Selecting deleted buffer"); |
c8804c4f MR |
2188 | set_buffer_internal (XBUFFER (buffer)); |
2189 | return buffer; | |
1ab256cb | 2190 | } |
d0628b06 | 2191 | |
66322887 | 2192 | /* Set the current buffer to BUFFER provided if it is alive. */ |
d0628b06 RS |
2193 | |
2194 | Lisp_Object | |
d3da34e0 | 2195 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 2196 | { |
e578f381 | 2197 | if (BUFFER_LIVE_P (XBUFFER (buffer))) |
a3d794a1 | 2198 | set_buffer_internal (XBUFFER (buffer)); |
d0628b06 RS |
2199 | return Qnil; |
2200 | } | |
1ab256cb | 2201 | \f |
a7ca3326 | 2202 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2203 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2204 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2205 | (void) |
1ab256cb | 2206 | { |
4b4deea2 | 2207 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2208 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2209 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2210 | return Qnil; |
2211 | } | |
1ab256cb | 2212 | \f |
a7ca3326 | 2213 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2214 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2215 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2216 | so the buffer is truly empty after this. */) |
5842a27b | 2217 | (void) |
1ab256cb RM |
2218 | { |
2219 | Fwiden (); | |
c0d9a0c3 GM |
2220 | |
2221 | del_range (BEG, Z); | |
c280bc6a | 2222 | |
1ab256cb RM |
2223 | current_buffer->last_window_start = 1; |
2224 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2225 | if future size is less than past size. Use of erase-buffer | |
2226 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2227 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2228 | return Qnil; |
2229 | } | |
2230 | ||
01136e9b | 2231 | void |
d3da34e0 | 2232 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2233 | { |
b7826503 PJ |
2234 | CHECK_NUMBER_COERCE_MARKER (*b); |
2235 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2236 | |
2237 | if (XINT (*b) > XINT (*e)) | |
2238 | { | |
03192067 KH |
2239 | Lisp_Object tem; |
2240 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2241 | } |
2242 | ||
d311d28c | 2243 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2244 | args_out_of_range (*b, *e); |
2245 | } | |
2246 | \f | |
b05525fa RS |
2247 | /* Advance BYTE_POS up to a character boundary |
2248 | and return the adjusted position. */ | |
2249 | ||
d311d28c PE |
2250 | static ptrdiff_t |
2251 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2252 | { |
f8449323 | 2253 | int c; |
b05525fa | 2254 | |
f8449323 RS |
2255 | if (byte_pos == BEG) |
2256 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2257 | return BEG; |
f8449323 RS |
2258 | |
2259 | c = FETCH_BYTE (byte_pos); | |
2260 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2261 | { |
1be6387d | 2262 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2263 | multibyte sequence. */ |
d311d28c | 2264 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2265 | |
2266 | do | |
2267 | { | |
2268 | byte_pos--; | |
2269 | c = FETCH_BYTE (byte_pos); | |
2270 | } | |
2271 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2272 | INC_POS (byte_pos); |
a9bcded1 KH |
2273 | if (byte_pos < orig_byte_pos) |
2274 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2275 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2276 | surely advance to the correct character boundary. If C is | |
2277 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2278 | } |
2279 | ||
20773569 | 2280 | return byte_pos; |
b05525fa RS |
2281 | } |
2282 | ||
13cda5f9 SM |
2283 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2284 | 1, 1, 0, | |
2285 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2286 | (Lisp_Object buffer) |
13cda5f9 SM |
2287 | { |
2288 | struct buffer *other_buffer; | |
2289 | CHECK_BUFFER (buffer); | |
2290 | other_buffer = XBUFFER (buffer); | |
2291 | ||
e578f381 | 2292 | if (!BUFFER_LIVE_P (other_buffer)) |
409f2919 | 2293 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2294 | |
13cda5f9 SM |
2295 | /* Actually, it probably works just fine. |
2296 | * if (other_buffer == current_buffer) | |
2297 | * error ("Cannot swap a buffer's text with itself"); */ | |
2298 | ||
2299 | /* Actually, this may be workable as well, tho probably only if they're | |
2300 | *both* indirect. */ | |
2301 | if (other_buffer->base_buffer | |
2302 | || current_buffer->base_buffer) | |
2303 | error ("Cannot swap indirect buffers's text"); | |
2304 | ||
2305 | { /* This is probably harder to make work. */ | |
2306 | struct buffer *other; | |
52b852c7 | 2307 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2308 | if (other->base_buffer == other_buffer |
2309 | || other->base_buffer == current_buffer) | |
2310 | error ("One of the buffers to swap has indirect buffers"); | |
2311 | } | |
2312 | ||
2313 | #define swapfield(field, type) \ | |
2314 | do { \ | |
2315 | type tmp##field = other_buffer->field; \ | |
2316 | other_buffer->field = current_buffer->field; \ | |
2317 | current_buffer->field = tmp##field; \ | |
2318 | } while (0) | |
5d8ea120 TT |
2319 | #define swapfield_(field, type) \ |
2320 | do { \ | |
4b4deea2 | 2321 | type tmp##field = BVAR (other_buffer, field); \ |
39eb03f1 PE |
2322 | bset_##field (other_buffer, BVAR (current_buffer, field)); \ |
2323 | bset_##field (current_buffer, tmp##field); \ | |
5d8ea120 | 2324 | } while (0) |
13cda5f9 SM |
2325 | |
2326 | swapfield (own_text, struct buffer_text); | |
2327 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2328 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2329 | #ifdef REL_ALLOC |
261cb4bb PE |
2330 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2331 | (void **) &other_buffer->own_text.beg); | |
2332 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2333 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2334 | #endif /* REL_ALLOC */ |
2335 | ||
d311d28c PE |
2336 | swapfield (pt, ptrdiff_t); |
2337 | swapfield (pt_byte, ptrdiff_t); | |
2338 | swapfield (begv, ptrdiff_t); | |
2339 | swapfield (begv_byte, ptrdiff_t); | |
2340 | swapfield (zv, ptrdiff_t); | |
2341 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2342 | eassert (!current_buffer->base_buffer); |
2343 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2344 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2345 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2346 | swapfield (newline_cache, struct region_cache *); | |
2347 | swapfield (width_run_cache, struct region_cache *); | |
2348 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2349 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2350 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2351 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2352 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2353 | swapfield_ (undo_list, Lisp_Object); |
2354 | swapfield_ (mark, Lisp_Object); | |
2355 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2356 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2357 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2358 | /* FIXME: Not sure what we should do with these *_marker fields. |
2359 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2360 | swapfield_ (pt_marker, Lisp_Object); |
2361 | swapfield_ (begv_marker, Lisp_Object); | |
2362 | swapfield_ (zv_marker, Lisp_Object); | |
39eb03f1 PE |
2363 | bset_point_before_scroll (current_buffer, Qnil); |
2364 | bset_point_before_scroll (other_buffer, Qnil); | |
13cda5f9 SM |
2365 | |
2366 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2367 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2368 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2369 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2370 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2371 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2372 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2373 | { |
2374 | struct Lisp_Marker *m; | |
2375 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2376 | if (m->buffer == other_buffer) | |
2377 | m->buffer = current_buffer; | |
b8ff72fa SM |
2378 | else |
2379 | /* Since there's no indirect buffer in sight, markers on | |
2380 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2381 | eassert (!m->buffer); | |
13cda5f9 SM |
2382 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2383 | if (m->buffer == current_buffer) | |
2384 | m->buffer = other_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 | 2389 | } |
126f1fc1 SM |
2390 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2391 | So since we just swapped the markers between the two buffers, we need | |
2392 | to undo the effect of this swap for window markers. */ | |
2393 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2394 | Lisp_Object buf1, buf2; | |
2395 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2396 | ||
2397 | while (NILP (Fmemq (w, ws))) | |
2398 | { | |
2399 | ws = Fcons (w, ws); | |
d3d50620 DA |
2400 | if (MARKERP (XWINDOW (w)->pointm) |
2401 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2402 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2403 | Fset_marker (XWINDOW (w)->pointm, | |
3a45383a | 2404 | make_number |
d3d50620 DA |
2405 | (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), |
2406 | XWINDOW (w)->buffer); | |
126f1fc1 SM |
2407 | w = Fnext_window (w, Qt, Qt); |
2408 | } | |
2409 | } | |
2410 | ||
13cda5f9 SM |
2411 | if (current_buffer->text->intervals) |
2412 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2413 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2414 | if (other_buffer->text->intervals) | |
2415 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2416 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2417 | ||
2418 | return Qnil; | |
2419 | } | |
2420 | ||
a7ca3326 | 2421 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2422 | 1, 1, 0, |
7ee72033 | 2423 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2424 | If FLAG is t, this makes the buffer a multibyte buffer. |
2425 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2426 | In these cases, the buffer contents remain unchanged as a sequence of |
2427 | bytes but the contents viewed as characters do change. | |
2428 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2429 | all eight-bit bytes to eight-bit characters. |
2430 | If the multibyte flag was really changed, undo information of the | |
2431 | current buffer is cleared. */) | |
5842a27b | 2432 | (Lisp_Object flag) |
3ac81adb | 2433 | { |
65745fad | 2434 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2435 | struct buffer *other; |
d311d28c | 2436 | ptrdiff_t begv, zv; |
37ef52bb PE |
2437 | bool narrowed = (BEG != BEGV || Z != ZV); |
2438 | bool modified_p = !NILP (Fbuffer_modified_p (Qnil)); | |
4b4deea2 | 2439 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2440 | struct gcpro gcpro1; |
3ac81adb | 2441 | |
6e553d5e RS |
2442 | if (current_buffer->base_buffer) |
2443 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2444 | ||
70e77119 | 2445 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2446 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2447 | return flag; |
2448 | ||
38babc07 KS |
2449 | GCPRO1 (old_undo); |
2450 | ||
2451 | /* Don't record these buffer changes. We will put a special undo entry | |
2452 | instead. */ | |
39eb03f1 | 2453 | bset_undo_list (current_buffer, Qt); |
b05525fa | 2454 | |
3ac81adb RS |
2455 | /* If the cached position is for this buffer, clear it out. */ |
2456 | clear_charpos_cache (current_buffer); | |
2457 | ||
458c8af4 KH |
2458 | if (NILP (flag)) |
2459 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2460 | else | |
2461 | begv = BEGV, zv = ZV; | |
2462 | ||
a9bcded1 KH |
2463 | if (narrowed) |
2464 | Fwiden (); | |
2465 | ||
3ac81adb RS |
2466 | if (NILP (flag)) |
2467 | { | |
d311d28c | 2468 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2469 | unsigned char *p; |
2470 | ||
3ac81adb RS |
2471 | /* Do this first, so it can use CHAR_TO_BYTE |
2472 | to calculate the old correspondences. */ | |
2473 | set_intervals_multibyte (0); | |
2474 | ||
39eb03f1 | 2475 | bset_enable_multibyte_characters (current_buffer, Qnil); |
3ac81adb RS |
2476 | |
2477 | Z = Z_BYTE; | |
2478 | BEGV = BEGV_BYTE; | |
2479 | ZV = ZV_BYTE; | |
2480 | GPT = GPT_BYTE; | |
2481 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2482 | ||
60ebfdf3 | 2483 | |
65745fad SM |
2484 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2485 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2486 | |
2487 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2488 | pos = BEG; | |
2489 | stop = GPT; | |
2490 | p = BEG_ADDR; | |
2491 | while (1) | |
2492 | { | |
2493 | int c, bytes; | |
2494 | ||
2495 | if (pos == stop) | |
2496 | { | |
2497 | if (pos == Z) | |
2498 | break; | |
2499 | p = GAP_END_ADDR; | |
2500 | stop = Z; | |
2501 | } | |
8f348ed5 KH |
2502 | if (ASCII_BYTE_P (*p)) |
2503 | p++, pos++; | |
2504 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2505 | { |
62a6e103 | 2506 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2507 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2508 | last one, and change the last one to the character |
a9bcded1 KH |
2509 | code. */ |
2510 | bytes--; | |
2511 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2512 | p = GAP_END_ADDR; | |
2513 | *p++ = c; | |
2514 | pos++; | |
2515 | if (begv > pos) | |
2516 | begv -= bytes; | |
2517 | if (zv > pos) | |
2518 | zv -= bytes; | |
2519 | stop = Z; | |
2520 | } | |
8f924df7 | 2521 | else |
8f348ed5 KH |
2522 | { |
2523 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2524 | p += bytes, pos += bytes; | |
2525 | } | |
a9bcded1 KH |
2526 | } |
2527 | if (narrowed) | |
2528 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2529 | } |
2530 | else | |
2531 | { | |
d311d28c PE |
2532 | ptrdiff_t pt = PT; |
2533 | ptrdiff_t pos, stop; | |
8f348ed5 | 2534 | unsigned char *p, *pend; |
a9bcded1 | 2535 | |
673c57d2 | 2536 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2537 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2538 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2539 | |
8f924df7 | 2540 | if (EQ (flag, Qt) |
a3a303df | 2541 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2542 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2543 | { | |
8f54f30a | 2544 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2545 | |
8f54f30a PE |
2546 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2547 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2548 | { |
d311d28c | 2549 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2550 | |
2551 | move_gap_both (new_gpt, new_gpt); | |
2552 | } | |
2553 | } | |
2554 | ||
a9bcded1 KH |
2555 | /* Make the buffer contents valid as multibyte by converting |
2556 | 8-bit characters to multibyte form. */ | |
2557 | pos = BEG; | |
2558 | stop = GPT; | |
2559 | p = BEG_ADDR; | |
8f348ed5 | 2560 | pend = GPT_ADDR; |
a9bcded1 KH |
2561 | while (1) |
2562 | { | |
2563 | int bytes; | |
2564 | ||
2565 | if (pos == stop) | |
2566 | { | |
2567 | if (pos == Z) | |
2568 | break; | |
2569 | p = GAP_END_ADDR; | |
8f348ed5 | 2570 | pend = Z_ADDR; |
a9bcded1 KH |
2571 | stop = Z; |
2572 | } | |
177c0ea7 | 2573 | |
a3a303df KH |
2574 | if (ASCII_BYTE_P (*p)) |
2575 | p++, pos++; | |
dcfb9bc4 KH |
2576 | else if (EQ (flag, Qt) |
2577 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2578 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2579 | p += bytes, pos += bytes; |
2580 | else | |
2581 | { | |
2582 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2583 | int c; |
a9bcded1 | 2584 | |
8f924df7 | 2585 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2586 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2587 | *p = tmp[0]; |
2588 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2589 | bytes--; | |
b68864e5 | 2590 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2591 | /* Now the gap is after the just inserted data. */ |
2592 | pos = GPT; | |
2593 | p = GAP_END_ADDR; | |
2594 | if (pos <= begv) | |
2595 | begv += bytes; | |
2596 | if (pos <= zv) | |
2597 | zv += bytes; | |
2598 | if (pos <= pt) | |
2599 | pt += bytes; | |
31285a8f | 2600 | pend = Z_ADDR; |
a9bcded1 KH |
2601 | stop = Z; |
2602 | } | |
2603 | } | |
2604 | ||
2605 | if (pt != PT) | |
2606 | TEMP_SET_PT (pt); | |
2607 | ||
2608 | if (narrowed) | |
2609 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2610 | ||
3ac81adb RS |
2611 | /* Do this first, so that chars_in_text asks the right question. |
2612 | set_intervals_multibyte needs it too. */ | |
39eb03f1 | 2613 | bset_enable_multibyte_characters (current_buffer, Qt); |
3ac81adb | 2614 | |
b05525fa | 2615 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2616 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2617 | |
673c57d2 | 2618 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2619 | |
2620 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2621 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2622 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2623 | else |
2624 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2625 | |
2626 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2627 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2628 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2629 | else |
2630 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2631 | |
2632 | { | |
d311d28c PE |
2633 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2634 | ptrdiff_t position; | |
b05525fa | 2635 | |
8f54f30a PE |
2636 | if (byte > GPT_BYTE) |
2637 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2638 | else |
8f54f30a PE |
2639 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2640 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2641 | } |
3ac81adb RS |
2642 | |
2643 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2644 | |
2645 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2646 | getting confused by the markers that have not yet been updated. | |
2647 | It is also a signal that it should never create a marker. */ | |
65745fad | 2648 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2649 | |
65745fad | 2650 | for (; tail; tail = tail->next) |
3ac81adb | 2651 | { |
65745fad SM |
2652 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2653 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2654 | } |
b69f9797 RS |
2655 | |
2656 | /* Make sure no markers were put on the chain | |
2657 | while the chain value was incorrect. */ | |
65745fad | 2658 | if (BUF_MARKERS (current_buffer)) |
1088b922 | 2659 | emacs_abort (); |
b69f9797 | 2660 | |
3ac81adb RS |
2661 | BUF_MARKERS (current_buffer) = markers; |
2662 | ||
2663 | /* Do this last, so it can calculate the new correspondences | |
2664 | between chars and bytes. */ | |
2665 | set_intervals_multibyte (1); | |
2666 | } | |
2667 | ||
38babc07 KS |
2668 | if (!EQ (old_undo, Qt)) |
2669 | { | |
2670 | /* Represent all the above changes by a special undo entry. */ | |
39eb03f1 PE |
2671 | bset_undo_list (current_buffer, |
2672 | Fcons (list3 (Qapply, | |
2673 | intern ("set-buffer-multibyte"), | |
2674 | NILP (flag) ? Qt : Qnil), | |
2675 | old_undo)); | |
38babc07 KS |
2676 | } |
2677 | ||
2678 | UNGCPRO; | |
a9bcded1 | 2679 | |
724b203f GM |
2680 | /* Changing the multibyteness of a buffer means that all windows |
2681 | showing that buffer must be updated thoroughly. */ | |
2682 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2683 | ++windows_or_buffers_changed; | |
2684 | ||
abc9d959 RS |
2685 | /* Copy this buffer's new multibyte status |
2686 | into all of its indirect buffers. */ | |
52b852c7 | 2687 | FOR_EACH_BUFFER (other) |
e578f381 | 2688 | if (other->base_buffer == current_buffer && BUFFER_LIVE_P (other)) |
724b203f | 2689 | { |
4b4deea2 TT |
2690 | BVAR (other, enable_multibyte_characters) |
2691 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2692 | other->prevent_redisplay_optimizations_p = 1; |
2693 | } | |
abc9d959 | 2694 | |
ed00559d KH |
2695 | /* Restore the modifiedness of the buffer. */ |
2696 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2697 | Fset_buffer_modified_p (Qnil); | |
2698 | ||
172f9454 KH |
2699 | /* Update coding systems of this buffer's process (if any). */ |
2700 | { | |
2701 | Lisp_Object process; | |
2702 | ||
2703 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2704 | if (PROCESSP (process)) | |
2705 | setup_process_coding_systems (process); | |
2706 | } | |
2707 | ||
3ac81adb RS |
2708 | return flag; |
2709 | } | |
2710 | \f | |
a7ca3326 | 2711 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2712 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2713 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2714 | Most local variable bindings are eliminated so that the default values |
2715 | become effective once more. Also, the syntax table is set from | |
2716 | `standard-syntax-table', the local keymap is set to nil, | |
2717 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2718 | This function also forces redisplay of the mode line. | |
2719 | ||
2720 | Every function to select a new major mode starts by | |
2721 | calling this function. | |
2722 | ||
2723 | As a special exception, local variables whose names have | |
2724 | a non-nil `permanent-local' property are not eliminated by this function. | |
2725 | ||
2726 | The first thing this function does is run | |
7ee72033 | 2727 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2728 | (void) |
1ab256cb | 2729 | { |
dee091a3 | 2730 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2731 | |
3709505e | 2732 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2733 | remain swapped in, in their symbols. */ |
1ab256cb | 2734 | |
2f3f993b | 2735 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2736 | |
2737 | /* Actually eliminate all local bindings of this buffer. */ | |
2738 | ||
13de9290 | 2739 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2740 | |
1ab256cb RM |
2741 | /* Force mode-line redisplay. Useful here because all major mode |
2742 | commands call this function. */ | |
2743 | update_mode_lines++; | |
2744 | ||
2745 | return Qnil; | |
2746 | } | |
2f3f993b RS |
2747 | |
2748 | /* Make sure no local variables remain set up with buffer B | |
2749 | for their current values. */ | |
2750 | ||
2751 | static void | |
d3da34e0 | 2752 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2753 | { |
ce5b453a | 2754 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2755 | |
2756 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2757 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2758 | |
67ee9f6e | 2759 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2760 | { |
ce5b453a SM |
2761 | Lisp_Object sym = XCAR (XCAR (alist)); |
2762 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2763 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2764 | now cached. */ |
ce5b453a | 2765 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2766 | { |
e7c10f83 SM |
2767 | /* Symbol is set up for this buffer's old local value: |
2768 | swap it out! */ | |
ce5b453a | 2769 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2770 | } |
2771 | } | |
2772 | } | |
1ab256cb | 2773 | \f |
2eec3b4e | 2774 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2775 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2776 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2777 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2778 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2779 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2780 | or where an overlay starts which ends at or after POS; |
624d2678 | 2781 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2782 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2783 | |
2784 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2785 | when this function is called. |
2786 | ||
37ef52bb PE |
2787 | If EXTEND, make the vector bigger if necessary. |
2788 | If not, never extend the vector, | |
2789 | and store only as many overlays as will fit. | |
2790 | But still return the total number of overlays. | |
ac869cf7 | 2791 | |
37ef52bb | 2792 | If CHANGE_REQ, any position written into *PREV_PTR or |
ac869cf7 MB |
2793 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the |
2794 | default (BEGV or ZV). */ | |
2eec3b4e | 2795 | |
b081724f | 2796 | ptrdiff_t |
37ef52bb | 2797 | overlays_at (EMACS_INT pos, bool extend, Lisp_Object **vec_ptr, |
b081724f | 2798 | ptrdiff_t *len_ptr, |
37ef52bb | 2799 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, bool change_req) |
1ab256cb | 2800 | { |
2410d73a SM |
2801 | Lisp_Object overlay, start, end; |
2802 | struct Lisp_Overlay *tail; | |
b081724f PE |
2803 | ptrdiff_t idx = 0; |
2804 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2805 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2806 | ptrdiff_t next = ZV; |
2807 | ptrdiff_t prev = BEGV; | |
37ef52bb | 2808 | bool inhibit_storing = 0; |
61d54cd5 | 2809 | |
fd318b54 | 2810 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2811 | { |
d311d28c | 2812 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2813 | |
2410d73a | 2814 | XSETMISC (overlay, tail); |
1ab256cb | 2815 | |
2eec3b4e RS |
2816 | start = OVERLAY_START (overlay); |
2817 | end = OVERLAY_END (overlay); | |
239c932b RS |
2818 | endpos = OVERLAY_POSITION (end); |
2819 | if (endpos < pos) | |
2820 | { | |
2821 | if (prev < endpos) | |
2822 | prev = endpos; | |
2823 | break; | |
2824 | } | |
413e06a4 RS |
2825 | startpos = OVERLAY_POSITION (start); |
2826 | /* This one ends at or after POS | |
daa1c109 | 2827 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2828 | if (prev < startpos && startpos < pos) |
2829 | prev = startpos; | |
239c932b RS |
2830 | if (endpos == pos) |
2831 | continue; | |
2eec3b4e RS |
2832 | if (startpos <= pos) |
2833 | { | |
2834 | if (idx == len) | |
2835 | { | |
61d54cd5 RS |
2836 | /* The supplied vector is full. |
2837 | Either make it bigger, or don't store any more in it. */ | |
2838 | if (extend) | |
2839 | { | |
0065d054 PE |
2840 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2841 | sizeof *vec); | |
61d54cd5 | 2842 | *vec_ptr = vec; |
0065d054 | 2843 | len = *len_ptr; |
61d54cd5 RS |
2844 | } |
2845 | else | |
2846 | inhibit_storing = 1; | |
2eec3b4e | 2847 | } |
61d54cd5 RS |
2848 | |
2849 | if (!inhibit_storing) | |
2850 | vec[idx] = overlay; | |
2851 | /* Keep counting overlays even if we can't return them all. */ | |
2852 | idx++; | |
2eec3b4e RS |
2853 | } |
2854 | else if (startpos < next) | |
2855 | next = startpos; | |
2856 | } | |
2857 | ||
fd318b54 | 2858 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2859 | { |
d311d28c | 2860 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2861 | |
2410d73a | 2862 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2863 | |
2864 | start = OVERLAY_START (overlay); | |
2865 | end = OVERLAY_END (overlay); | |
2866 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2867 | if (pos < startpos) |
2eec3b4e RS |
2868 | { |
2869 | if (startpos < next) | |
2870 | next = startpos; | |
2871 | break; | |
2872 | } | |
239c932b RS |
2873 | endpos = OVERLAY_POSITION (end); |
2874 | if (pos < endpos) | |
2eec3b4e RS |
2875 | { |
2876 | if (idx == len) | |
2877 | { | |
61d54cd5 RS |
2878 | if (extend) |
2879 | { | |
0065d054 PE |
2880 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2881 | sizeof *vec); | |
61d54cd5 | 2882 | *vec_ptr = vec; |
0065d054 | 2883 | len = *len_ptr; |
61d54cd5 RS |
2884 | } |
2885 | else | |
2886 | inhibit_storing = 1; | |
2eec3b4e | 2887 | } |
61d54cd5 RS |
2888 | |
2889 | if (!inhibit_storing) | |
2890 | vec[idx] = overlay; | |
2891 | idx++; | |
413e06a4 RS |
2892 | |
2893 | if (startpos < pos && startpos > prev) | |
2894 | prev = startpos; | |
2eec3b4e | 2895 | } |
239c932b RS |
2896 | else if (endpos < pos && endpos > prev) |
2897 | prev = endpos; | |
1d5f4c1d MB |
2898 | else if (endpos == pos && startpos > prev |
2899 | && (!change_req || startpos < pos)) | |
413e06a4 | 2900 | prev = startpos; |
1ab256cb RM |
2901 | } |
2902 | ||
239c932b RS |
2903 | if (next_ptr) |
2904 | *next_ptr = next; | |
2905 | if (prev_ptr) | |
2906 | *prev_ptr = prev; | |
2eec3b4e RS |
2907 | return idx; |
2908 | } | |
74514898 | 2909 | \f |
7723e095 MR |
2910 | /* Find all the overlays in the current buffer that overlap the range |
2911 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2912 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2913 | |
177c0ea7 | 2914 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2915 | Store in *LEN_PTR the size allocated for the vector. |
2916 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2917 | or ZV if there are no more overlays. | |
2918 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2919 | or BEGV if there are no previous overlays. | |
2920 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2921 | ||
2922 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2923 | when this function is called. | |
2924 | ||
37ef52bb PE |
2925 | If EXTEND, make the vector bigger if necessary. |
2926 | If not, never extend the vector, | |
2927 | and store only as many overlays as will fit. | |
2928 | But still return the total number of overlays. */ | |
74514898 | 2929 | |
21514da7 | 2930 | static ptrdiff_t |
37ef52bb | 2931 | overlays_in (EMACS_INT beg, EMACS_INT end, bool extend, |
21514da7 | 2932 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2933 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2934 | { |
2410d73a SM |
2935 | Lisp_Object overlay, ostart, oend; |
2936 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2937 | ptrdiff_t idx = 0; |
2938 | ptrdiff_t len = *len_ptr; | |
74514898 | 2939 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2940 | ptrdiff_t next = ZV; |
2941 | ptrdiff_t prev = BEGV; | |
37ef52bb PE |
2942 | bool inhibit_storing = 0; |
2943 | bool end_is_Z = end == Z; | |
74514898 | 2944 | |
fd318b54 | 2945 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2946 | { |
d311d28c | 2947 | ptrdiff_t startpos, endpos; |
74514898 | 2948 | |
2410d73a | 2949 | XSETMISC (overlay, tail); |
74514898 RS |
2950 | |
2951 | ostart = OVERLAY_START (overlay); | |
2952 | oend = OVERLAY_END (overlay); | |
2953 | endpos = OVERLAY_POSITION (oend); | |
2954 | if (endpos < beg) | |
2955 | { | |
2956 | if (prev < endpos) | |
2957 | prev = endpos; | |
2958 | break; | |
2959 | } | |
2960 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2961 | /* Count an interval if it overlaps the range, is empty at the |
2962 | start of the range, or is empty at END provided END denotes the | |
2963 | end of the buffer. */ | |
74514898 | 2964 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2965 | || (startpos == endpos |
2966 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2967 | { |
2968 | if (idx == len) | |
2969 | { | |
2970 | /* The supplied vector is full. | |
2971 | Either make it bigger, or don't store any more in it. */ | |
2972 | if (extend) | |
2973 | { | |
0065d054 PE |
2974 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2975 | sizeof *vec); | |
74514898 | 2976 | *vec_ptr = vec; |
0065d054 | 2977 | len = *len_ptr; |
74514898 RS |
2978 | } |
2979 | else | |
2980 | inhibit_storing = 1; | |
2981 | } | |
2982 | ||
2983 | if (!inhibit_storing) | |
2984 | vec[idx] = overlay; | |
2985 | /* Keep counting overlays even if we can't return them all. */ | |
2986 | idx++; | |
2987 | } | |
2988 | else if (startpos < next) | |
2989 | next = startpos; | |
2990 | } | |
2991 | ||
fd318b54 | 2992 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2993 | { |
d311d28c | 2994 | ptrdiff_t startpos, endpos; |
74514898 | 2995 | |
2410d73a | 2996 | XSETMISC (overlay, tail); |
74514898 RS |
2997 | |
2998 | ostart = OVERLAY_START (overlay); | |
2999 | oend = OVERLAY_END (overlay); | |
3000 | startpos = OVERLAY_POSITION (ostart); | |
3001 | if (end < startpos) | |
3002 | { | |
3003 | if (startpos < next) | |
3004 | next = startpos; | |
3005 | break; | |
3006 | } | |
3007 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
3008 | /* Count an interval if it overlaps the range, is empty at the |
3009 | start of the range, or is empty at END provided END denotes the | |
3010 | end of the buffer. */ | |
74514898 | 3011 | if ((beg < endpos && startpos < end) |
7723e095 MR |
3012 | || (startpos == endpos |
3013 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
3014 | { |
3015 | if (idx == len) | |
3016 | { | |
3017 | if (extend) | |
3018 | { | |
0065d054 PE |
3019 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
3020 | sizeof *vec); | |
74514898 | 3021 | *vec_ptr = vec; |
0065d054 | 3022 | len = *len_ptr; |
74514898 RS |
3023 | } |
3024 | else | |
3025 | inhibit_storing = 1; | |
3026 | } | |
3027 | ||
3028 | if (!inhibit_storing) | |
3029 | vec[idx] = overlay; | |
3030 | idx++; | |
3031 | } | |
3032 | else if (endpos < beg && endpos > prev) | |
3033 | prev = endpos; | |
3034 | } | |
fc04fa47 | 3035 | |
74514898 RS |
3036 | if (next_ptr) |
3037 | *next_ptr = next; | |
3038 | if (prev_ptr) | |
3039 | *prev_ptr = prev; | |
3040 | return idx; | |
3041 | } | |
09a22085 GM |
3042 | |
3043 | ||
37ef52bb | 3044 | /* Return true if there exists an overlay with a non-nil |
09a22085 GM |
3045 | `mouse-face' property overlapping OVERLAY. */ |
3046 | ||
37ef52bb | 3047 | bool |
d3da34e0 | 3048 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 3049 | { |
d311d28c PE |
3050 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3051 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 3052 | ptrdiff_t n, i, size; |
09a22085 | 3053 | Lisp_Object *v, tem; |
177c0ea7 | 3054 | |
bfd8410f | 3055 | size = 10; |
38182d90 | 3056 | v = alloca (size * sizeof *v); |
bfd8410f GM |
3057 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
3058 | if (n > size) | |
09a22085 | 3059 | { |
38182d90 | 3060 | v = alloca (n * sizeof *v); |
09a22085 GM |
3061 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
3062 | } | |
3063 | ||
3064 | for (i = 0; i < n; ++i) | |
3065 | if (!EQ (v[i], overlay) | |
3066 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
3067 | !NILP (tem))) | |
3068 | break; | |
3069 | ||
3070 | return i < n; | |
3071 | } | |
3072 | ||
3073 | ||
74514898 | 3074 | \f |
fc04fa47 | 3075 | /* Fast function to just test if we're at an overlay boundary. */ |
37ef52bb | 3076 | bool |
d311d28c | 3077 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 3078 | { |
2410d73a SM |
3079 | Lisp_Object overlay; |
3080 | struct Lisp_Overlay *tail; | |
fc04fa47 | 3081 | |
fd318b54 | 3082 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 3083 | { |
d311d28c | 3084 | ptrdiff_t endpos; |
fc04fa47 | 3085 | |
2410d73a | 3086 | XSETMISC (overlay ,tail); |
22657b40 | 3087 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3088 | |
3089 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3090 | if (endpos < pos) | |
3091 | break; | |
3092 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
3093 | return 1; | |
3094 | } | |
3095 | ||
fd318b54 | 3096 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 3097 | { |
d311d28c | 3098 | ptrdiff_t startpos; |
fc04fa47 | 3099 | |
2410d73a | 3100 | XSETMISC (overlay, tail); |
22657b40 | 3101 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
3102 | |
3103 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3104 | if (pos < startpos) | |
3105 | break; | |
3106 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
3107 | return 1; | |
3108 | } | |
3109 | return 0; | |
3110 | } | |
2eec3b4e | 3111 | \f |
5985d248 KH |
3112 | struct sortvec |
3113 | { | |
3114 | Lisp_Object overlay; | |
d311d28c | 3115 | ptrdiff_t beg, end; |
fadf4e30 | 3116 | EMACS_INT priority; |
5985d248 KH |
3117 | }; |
3118 | ||
3119 | static int | |
d3da34e0 | 3120 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 3121 | { |
dfcf069d AS |
3122 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3123 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 3124 | if (s1->priority != s2->priority) |
c20998a7 | 3125 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 3126 | if (s1->beg != s2->beg) |
c20998a7 | 3127 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 3128 | if (s1->end != s2->end) |
c20998a7 | 3129 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
3130 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
3131 | between "equal" overlays. The result can still change between | |
3132 | invocations of Emacs, but it won't change in the middle of | |
3133 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
3134 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
3135 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
3136 | return 0; |
3137 | } | |
3138 | ||
3139 | /* Sort an array of overlays by priority. The array is modified in place. | |
3140 | The return value is the new size; this may be smaller than the original | |
3141 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
3142 | ptrdiff_t |
3143 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 3144 | { |
b081724f | 3145 | ptrdiff_t i, j; |
38182d90 | 3146 | struct sortvec *sortvec = alloca (noverlays * sizeof *sortvec); |
5985d248 KH |
3147 | |
3148 | /* Put the valid and relevant overlays into sortvec. */ | |
3149 | ||
3150 | for (i = 0, j = 0; i < noverlays; i++) | |
3151 | { | |
0fa767e7 | 3152 | Lisp_Object tem; |
c99fc30f | 3153 | Lisp_Object overlay; |
5985d248 | 3154 | |
c99fc30f | 3155 | overlay = overlay_vec[i]; |
22657b40 | 3156 | if (OVERLAYP (overlay) |
5985d248 KH |
3157 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
3158 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3159 | { | |
0fa767e7 KH |
3160 | /* If we're interested in a specific window, then ignore |
3161 | overlays that are limited to some other window. */ | |
3162 | if (w) | |
5985d248 | 3163 | { |
28545e04 | 3164 | Lisp_Object window; |
0fa767e7 KH |
3165 | |
3166 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3167 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3168 | continue; |
5985d248 | 3169 | } |
0fa767e7 KH |
3170 | |
3171 | /* This overlay is good and counts: put it into sortvec. */ | |
3172 | sortvec[j].overlay = overlay; | |
3173 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3174 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3175 | tem = Foverlay_get (overlay, Qpriority); | |
3176 | if (INTEGERP (tem)) | |
3177 | sortvec[j].priority = XINT (tem); | |
3178 | else | |
3179 | sortvec[j].priority = 0; | |
3180 | j++; | |
5985d248 KH |
3181 | } |
3182 | } | |
3183 | noverlays = j; | |
3184 | ||
3185 | /* Sort the overlays into the proper order: increasing priority. */ | |
3186 | ||
3187 | if (noverlays > 1) | |
3188 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3189 | ||
3190 | for (i = 0; i < noverlays; i++) | |
3191 | overlay_vec[i] = sortvec[i].overlay; | |
3192 | return (noverlays); | |
3193 | } | |
3194 | \f | |
bbbe9545 KH |
3195 | struct sortstr |
3196 | { | |
cb26008f | 3197 | Lisp_Object string, string2; |
93cb6be3 | 3198 | ptrdiff_t size; |
8961a454 | 3199 | EMACS_INT priority; |
bbbe9545 KH |
3200 | }; |
3201 | ||
e8185fa8 KH |
3202 | struct sortstrlist |
3203 | { | |
3204 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3205 | ptrdiff_t size; /* Allocated length of that array. */ |
3206 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3207 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3208 | }; |
3209 | ||
3210 | /* Buffers for storing information about the overlays touching a given | |
3211 | position. These could be automatic variables in overlay_strings, but | |
3212 | it's more efficient to hold onto the memory instead of repeatedly | |
3213 | allocating and freeing it. */ | |
3214 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3215 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3216 | |
3217 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3218 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3219 | |
bbbe9545 KH |
3220 | /* A comparison function suitable for passing to qsort. */ |
3221 | static int | |
d3da34e0 | 3222 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3223 | { |
3224 | struct sortstr *s1 = (struct sortstr *)as1; | |
3225 | struct sortstr *s2 = (struct sortstr *)as2; | |
3226 | if (s1->size != s2->size) | |
c20998a7 | 3227 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3228 | if (s1->priority != s2->priority) |
c20998a7 | 3229 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3230 | return 0; |
3231 | } | |
3232 | ||
e8185fa8 | 3233 | static void |
93cb6be3 PE |
3234 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3235 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3236 | { |
d311d28c | 3237 | ptrdiff_t nbytes; |
43d27a72 | 3238 | |
e8185fa8 | 3239 | if (ssl->used == ssl->size) |
0065d054 | 3240 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3241 | ssl->buf[ssl->used].string = str; |
cb26008f | 3242 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3243 | ssl->buf[ssl->used].size = size; |
3244 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3245 | ssl->used++; | |
43d27a72 | 3246 | |
4b4deea2 | 3247 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3248 | nbytes = SCHARS (str); |
43d27a72 | 3249 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3250 | nbytes = count_size_as_multibyte (SDATA (str), |
3251 | SBYTES (str)); | |
43d27a72 | 3252 | else |
d5db4077 | 3253 | nbytes = SBYTES (str); |
43d27a72 | 3254 | |
0065d054 PE |
3255 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3256 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3257 | ssl->bytes += nbytes; |
3258 | ||
cb26008f | 3259 | if (STRINGP (str2)) |
43d27a72 | 3260 | { |
4b4deea2 | 3261 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3262 | nbytes = SCHARS (str2); |
43d27a72 | 3263 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3264 | nbytes = count_size_as_multibyte (SDATA (str2), |
3265 | SBYTES (str2)); | |
43d27a72 | 3266 | else |
d5db4077 | 3267 | nbytes = SBYTES (str2); |
43d27a72 | 3268 | |
0065d054 PE |
3269 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3270 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3271 | ssl->bytes += nbytes; |
3272 | } | |
e8185fa8 | 3273 | } |
bbbe9545 KH |
3274 | |
3275 | /* Return the concatenation of the strings associated with overlays that | |
3276 | begin or end at POS, ignoring overlays that are specific to a window | |
3277 | other than W. The strings are concatenated in the appropriate order: | |
3278 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3279 | lower. Normally all of the after-strings come first, but zero-sized |
3280 | overlays have their after-strings ride along with the before-strings | |
3281 | because it would look strange to print them inside-out. | |
3282 | ||
3283 | Returns the string length, and stores the contents indirectly through | |
3284 | PSTR, if that variable is non-null. The string may be overwritten by | |
3285 | subsequent calls. */ | |
6b5d3b89 | 3286 | |
d311d28c PE |
3287 | ptrdiff_t |
3288 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3289 | { |
28545e04 | 3290 | Lisp_Object overlay, window, str; |
2410d73a | 3291 | struct Lisp_Overlay *ov; |
d311d28c | 3292 | ptrdiff_t startpos, endpos; |
37ef52bb | 3293 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3294 | |
e8185fa8 KH |
3295 | overlay_heads.used = overlay_heads.bytes = 0; |
3296 | overlay_tails.used = overlay_tails.bytes = 0; | |
fd318b54 | 3297 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3298 | { |
2410d73a | 3299 | XSETMISC (overlay, ov); |
c2d5b10f | 3300 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3301 | |
3302 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3303 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3304 | if (endpos < pos) | |
3305 | break; | |
3306 | if (endpos != pos && startpos != pos) | |
3307 | continue; | |
3308 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3309 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3310 | continue; |
e8185fa8 KH |
3311 | if (startpos == pos |
3312 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3313 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3314 | (startpos == endpos |
3315 | ? Foverlay_get (overlay, Qafter_string) | |
3316 | : Qnil), | |
3317 | Foverlay_get (overlay, Qpriority), | |
3318 | endpos - startpos); | |
3319 | else if (endpos == pos | |
3320 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3321 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3322 | Foverlay_get (overlay, Qpriority), |
3323 | endpos - startpos); | |
bbbe9545 | 3324 | } |
fd318b54 | 3325 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3326 | { |
2410d73a SM |
3327 | XSETMISC (overlay, ov); |
3328 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3329 | |
3330 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3331 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3332 | if (startpos > pos) | |
3333 | break; | |
e8185fa8 KH |
3334 | if (endpos != pos && startpos != pos) |
3335 | continue; | |
3336 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3337 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3338 | continue; |
e8185fa8 KH |
3339 | if (startpos == pos |
3340 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3341 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3342 | (startpos == endpos |
3343 | ? Foverlay_get (overlay, Qafter_string) | |
3344 | : Qnil), | |
3345 | Foverlay_get (overlay, Qpriority), | |
3346 | endpos - startpos); | |
3347 | else if (endpos == pos | |
3348 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3349 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3350 | Foverlay_get (overlay, Qpriority), |
3351 | endpos - startpos); | |
bbbe9545 | 3352 | } |
e8185fa8 KH |
3353 | if (overlay_tails.used > 1) |
3354 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3355 | cmp_for_strings); | |
3356 | if (overlay_heads.used > 1) | |
3357 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3358 | cmp_for_strings); | |
3359 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3360 | { |
e8185fa8 | 3361 | Lisp_Object tem; |
d311d28c | 3362 | ptrdiff_t i; |
9f4d7cde | 3363 | unsigned char *p; |
0065d054 | 3364 | ptrdiff_t total; |
bbbe9545 | 3365 | |
0065d054 PE |
3366 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3367 | memory_full (SIZE_MAX); | |
3368 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3369 | if (total > overlay_str_len) |
0065d054 PE |
3370 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3371 | total - overlay_str_len, -1, 1); | |
3372 | ||
bbbe9545 | 3373 | p = overlay_str_buf; |
e8185fa8 | 3374 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3375 | { |
d311d28c | 3376 | ptrdiff_t nbytes; |
e8185fa8 | 3377 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3378 | nbytes = copy_text (SDATA (tem), p, |
3379 | SBYTES (tem), | |
43d27a72 RS |
3380 | STRING_MULTIBYTE (tem), multibyte); |
3381 | p += nbytes; | |
bbbe9545 | 3382 | } |
e8185fa8 | 3383 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3384 | { |
d311d28c | 3385 | ptrdiff_t nbytes; |
e8185fa8 | 3386 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3387 | nbytes = copy_text (SDATA (tem), p, |
3388 | SBYTES (tem), | |
43d27a72 RS |
3389 | STRING_MULTIBYTE (tem), multibyte); |
3390 | p += nbytes; | |
cb26008f KH |
3391 | tem = overlay_heads.buf[i].string2; |
3392 | if (STRINGP (tem)) | |
3393 | { | |
d5db4077 KR |
3394 | nbytes = copy_text (SDATA (tem), p, |
3395 | SBYTES (tem), | |
43d27a72 RS |
3396 | STRING_MULTIBYTE (tem), multibyte); |
3397 | p += nbytes; | |
cb26008f | 3398 | } |
bbbe9545 | 3399 | } |
cb26008f | 3400 | if (p != overlay_str_buf + total) |
1088b922 | 3401 | emacs_abort (); |
bbbe9545 KH |
3402 | if (pstr) |
3403 | *pstr = overlay_str_buf; | |
e8185fa8 | 3404 | return total; |
bbbe9545 | 3405 | } |
e8185fa8 | 3406 | return 0; |
bbbe9545 KH |
3407 | } |
3408 | \f | |
5c4f68f1 | 3409 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3410 | |
2eec3b4e | 3411 | void |
d311d28c | 3412 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3413 | { |
2410d73a SM |
3414 | Lisp_Object overlay, beg, end; |
3415 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3416 | |
3417 | /* See if anything in overlays_before should move to overlays_after. */ | |
3418 | ||
3419 | /* We don't strictly need prev in this loop; it should always be nil. | |
3420 | But we use it for symmetry and in case that should cease to be true | |
3421 | with some future change. */ | |
2410d73a | 3422 | prev = NULL; |
fd318b54 | 3423 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) |
1ab256cb | 3424 | { |
2410d73a SM |
3425 | next = tail->next; |
3426 | XSETMISC (overlay, tail); | |
22657b40 | 3427 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3428 | |
2eec3b4e RS |
3429 | beg = OVERLAY_START (overlay); |
3430 | end = OVERLAY_END (overlay); | |
1ab256cb | 3431 | |
2eec3b4e | 3432 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3433 | { |
2eec3b4e | 3434 | /* OVERLAY needs to be moved. */ |
d311d28c | 3435 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3436 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3437 | |
3438 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3439 | if (prev) |
3440 | prev->next = next; | |
2eec3b4e | 3441 | else |
0c94c8d6 | 3442 | set_buffer_overlays_before (buf, next); |
2eec3b4e RS |
3443 | |
3444 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3445 | other_prev = NULL; |
fd318b54 | 3446 | for (other = buf->overlays_after; other; |
2410d73a | 3447 | other_prev = other, other = other->next) |
1ab256cb | 3448 | { |
6af718a4 | 3449 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3450 | |
2410d73a | 3451 | XSETMISC (otheroverlay, other); |
22657b40 | 3452 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3453 | |
3454 | otherbeg = OVERLAY_START (otheroverlay); | |
3455 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3456 | break; | |
1ab256cb | 3457 | } |
2eec3b4e RS |
3458 | |
3459 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3460 | tail->next = other; |
3461 | if (other_prev) | |
3462 | other_prev->next = tail; | |
1ab256cb | 3463 | else |
0c94c8d6 | 3464 | set_buffer_overlays_after (buf, tail); |
2eec3b4e | 3465 | tail = prev; |
1ab256cb | 3466 | } |
2eec3b4e RS |
3467 | else |
3468 | /* We've reached the things that should stay in overlays_before. | |
3469 | All the rest of overlays_before must end even earlier, | |
3470 | so stop now. */ | |
3471 | break; | |
3472 | } | |
3473 | ||
3474 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3475 | prev = NULL; |
fd318b54 | 3476 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) |
2eec3b4e | 3477 | { |
2410d73a SM |
3478 | next = tail->next; |
3479 | XSETMISC (overlay, tail); | |
22657b40 | 3480 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3481 | |
3482 | beg = OVERLAY_START (overlay); | |
3483 | end = OVERLAY_END (overlay); | |
3484 | ||
3485 | /* Stop looking, when we know that nothing further | |
3486 | can possibly end before POS. */ | |
3487 | if (OVERLAY_POSITION (beg) > pos) | |
3488 | break; | |
3489 | ||
3490 | if (OVERLAY_POSITION (end) <= pos) | |
3491 | { | |
3492 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3493 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3494 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3495 | |
3496 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3497 | if (prev) |
3498 | prev->next = next; | |
2eec3b4e | 3499 | else |
0c94c8d6 | 3500 | set_buffer_overlays_after (buf, next); |
2eec3b4e RS |
3501 | |
3502 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3503 | other_prev = NULL; |
fd318b54 | 3504 | for (other = buf->overlays_before; other; |
2410d73a | 3505 | other_prev = other, other = other->next) |
2eec3b4e RS |
3506 | { |
3507 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3508 | |
2410d73a | 3509 | XSETMISC (otheroverlay, other); |
22657b40 | 3510 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3511 | |
3512 | otherend = OVERLAY_END (otheroverlay); | |
3513 | if (OVERLAY_POSITION (otherend) <= where) | |
3514 | break; | |
3515 | } | |
3516 | ||
3517 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3518 | tail->next = other; |
3519 | if (other_prev) | |
3520 | other_prev->next = tail; | |
2eec3b4e | 3521 | else |
0c94c8d6 | 3522 | set_buffer_overlays_before (buf, tail); |
2eec3b4e RS |
3523 | tail = prev; |
3524 | } | |
3525 | } | |
3526 | ||
c2d5b10f | 3527 | buf->overlay_center = pos; |
2eec3b4e | 3528 | } |
2b1bdf65 | 3529 | |
423cdb46 | 3530 | void |
d311d28c | 3531 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3532 | { |
3533 | /* After an insertion, the lists are still sorted properly, | |
3534 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3535 | if (current_buffer->overlay_center >= pos) |
3536 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3537 | } |
3538 | ||
3539 | void | |
d311d28c | 3540 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3541 | { |
c2d5b10f | 3542 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3543 | /* The deletion was to our right. No change needed; the before- and |
3544 | after-lists are still consistent. */ | |
3545 | ; | |
d311d28c | 3546 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3547 | /* The deletion was to our left. We need to adjust the center value |
3548 | to account for the change in position, but the lists are consistent | |
3549 | given the new value. */ | |
c2d5b10f | 3550 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3551 | else |
3552 | /* We're right in the middle. There might be things on the after-list | |
3553 | that now belong on the before-list. Recentering will move them, | |
3554 | and also update the center point. */ | |
3555 | recenter_overlay_lists (current_buffer, pos); | |
3556 | } | |
3557 | ||
2b1bdf65 KH |
3558 | /* Fix up overlays that were garbled as a result of permuting markers |
3559 | in the range START through END. Any overlay with at least one | |
3560 | endpoint in this range will need to be unlinked from the overlay | |
3561 | list and reinserted in its proper place. | |
3562 | Such an overlay might even have negative size at this point. | |
6b61353c | 3563 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3564 | void |
d311d28c | 3565 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3566 | { |
6af718a4 | 3567 | Lisp_Object overlay; |
5df8f01b PE |
3568 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3569 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3570 | /* These are either nil, indicating that before_list or after_list |
3571 | should be assigned, or the cons cell the cdr of which should be | |
3572 | assigned. */ | |
2410d73a | 3573 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3574 | /* 'Parent', likewise, indicates a cons cell or |
fd318b54 | 3575 | current_buffer->overlays_before or overlays_after, depending |
1138e742 | 3576 | which loop we're in. */ |
2410d73a | 3577 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3578 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3579 | |
3580 | /* This algorithm shifts links around instead of consing and GCing. | |
3581 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3582 | well-formed list except that its last element, the CDR of beforep |
3583 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3584 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3585 | that before_list isn't initialized, although it may look | |
3586 | strange. */ | |
fd318b54 | 3587 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3588 | { |
2410d73a | 3589 | XSETMISC (overlay, tail); |
6b61353c | 3590 | |
2b1bdf65 | 3591 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3592 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3593 | ||
3594 | /* If the overlay is backwards, make it empty. */ | |
3595 | if (endpos < startpos) | |
3596 | { | |
3597 | startpos = endpos; | |
3598 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3599 | Qnil); | |
3600 | } | |
3601 | ||
2b1bdf65 KH |
3602 | if (endpos < start) |
3603 | break; | |
60ebfdf3 | 3604 | |
2b1bdf65 KH |
3605 | if (endpos < end |
3606 | || (startpos >= start && startpos < end)) | |
3607 | { | |
2b1bdf65 KH |
3608 | /* Add it to the end of the wrong list. Later on, |
3609 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3610 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3611 | { |
2410d73a | 3612 | if (!afterp) |
1138e742 KR |
3613 | after_list = tail; |
3614 | else | |
2410d73a | 3615 | afterp->next = tail; |
1138e742 | 3616 | afterp = tail; |
2b1bdf65 KH |
3617 | } |
3618 | else | |
3619 | { | |
2410d73a | 3620 | if (!beforep) |
1138e742 KR |
3621 | before_list = tail; |
3622 | else | |
2410d73a | 3623 | beforep->next = tail; |
1138e742 | 3624 | beforep = tail; |
2b1bdf65 | 3625 | } |
2410d73a | 3626 | if (!parent) |
0c94c8d6 | 3627 | set_buffer_overlays_before (current_buffer, tail->next); |
1138e742 | 3628 | else |
2410d73a SM |
3629 | parent->next = tail->next; |
3630 | tail = tail->next; | |
2b1bdf65 KH |
3631 | } |
3632 | else | |
2410d73a | 3633 | parent = tail, tail = parent->next; |
2b1bdf65 | 3634 | } |
fd318b54 | 3635 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3636 | { |
2410d73a | 3637 | XSETMISC (overlay, tail); |
6b61353c | 3638 | |
2b1bdf65 | 3639 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3640 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3641 | ||
3642 | /* If the overlay is backwards, make it empty. */ | |
3643 | if (endpos < startpos) | |
3644 | { | |
3645 | startpos = endpos; | |
3646 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3647 | Qnil); |
6b61353c KH |
3648 | } |
3649 | ||
2b1bdf65 KH |
3650 | if (startpos >= end) |
3651 | break; | |
6b61353c | 3652 | |
2b1bdf65 KH |
3653 | if (startpos >= start |
3654 | || (endpos >= start && endpos < end)) | |
3655 | { | |
c2d5b10f | 3656 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3657 | { |
2410d73a | 3658 | if (!afterp) |
1138e742 KR |
3659 | after_list = tail; |
3660 | else | |
2410d73a | 3661 | afterp->next = tail; |
1138e742 | 3662 | afterp = tail; |
2b1bdf65 KH |
3663 | } |
3664 | else | |
3665 | { | |
2410d73a | 3666 | if (!beforep) |
1138e742 KR |
3667 | before_list = tail; |
3668 | else | |
2410d73a | 3669 | beforep->next = tail; |
1138e742 | 3670 | beforep = tail; |
2b1bdf65 | 3671 | } |
2410d73a | 3672 | if (!parent) |
0c94c8d6 | 3673 | set_buffer_overlays_after (current_buffer, tail->next); |
1138e742 | 3674 | else |
2410d73a SM |
3675 | parent->next = tail->next; |
3676 | tail = tail->next; | |
2b1bdf65 KH |
3677 | } |
3678 | else | |
2410d73a | 3679 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3680 | } |
3681 | ||
3682 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3683 | and let the recenter function make it sane again. */ | |
2410d73a | 3684 | if (beforep) |
1138e742 | 3685 | { |
fd318b54 | 3686 | beforep->next = current_buffer->overlays_before; |
0c94c8d6 | 3687 | set_buffer_overlays_before (current_buffer, before_list); |
1138e742 | 3688 | } |
c2d5b10f | 3689 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3690 | |
2410d73a | 3691 | if (afterp) |
1138e742 | 3692 | { |
fd318b54 | 3693 | afterp->next = current_buffer->overlays_after; |
0c94c8d6 | 3694 | set_buffer_overlays_after (current_buffer, after_list); |
1138e742 | 3695 | } |
c2d5b10f | 3696 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3697 | } |
3b06f880 KH |
3698 | |
3699 | /* We have two types of overlay: the one whose ending marker is | |
3700 | after-insertion-marker (this is the usual case) and the one whose | |
3701 | ending marker is before-insertion-marker. When `overlays_before' | |
3702 | contains overlays of the latter type and the former type in this | |
3703 | order and both overlays end at inserting position, inserting a text | |
3704 | increases only the ending marker of the latter type, which results | |
3705 | in incorrect ordering of `overlays_before'. | |
3706 | ||
3707 | This function fixes ordering of overlays in the slot | |
3708 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3709 | was at PREV, and now is at POS. */ | |
3710 | ||
01136e9b | 3711 | void |
d311d28c | 3712 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3713 | { |
2410d73a | 3714 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
fd318b54 | 3715 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; |
2410d73a | 3716 | Lisp_Object tem; |
d311d28c | 3717 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3718 | |
3719 | /* After the insertion, the several overlays may be in incorrect | |
3720 | order. The possibility is that, in the list `overlays_before', | |
3721 | an overlay which ends at POS appears after an overlay which ends | |
3722 | at PREV. Since POS is greater than PREV, we must fix the | |
3723 | ordering of these overlays, by moving overlays ends at POS before | |
3724 | the overlays ends at PREV. */ | |
3725 | ||
3726 | /* At first, find a place where disordered overlays should be linked | |
3727 | in. It is where an overlay which end before POS exists. (i.e. an | |
3728 | overlay whose ending marker is after-insertion-marker if disorder | |
3729 | exists). */ | |
2410d73a SM |
3730 | while (tail |
3731 | && (XSETMISC (tem, tail), | |
3732 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3733 | { |
3734 | parent = tail; | |
2410d73a | 3735 | tail = tail->next; |
1138e742 | 3736 | } |
3b06f880 KH |
3737 | |
3738 | /* If we don't find such an overlay, | |
3739 | or the found one ends before PREV, | |
3740 | or the found one is the last one in the list, | |
3741 | we don't have to fix anything. */ | |
f93ad4cf | 3742 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3743 | return; |
3744 | ||
1138e742 KR |
3745 | right_pair = parent; |
3746 | parent = tail; | |
2410d73a | 3747 | tail = tail->next; |
3b06f880 | 3748 | |
1138e742 | 3749 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3750 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3751 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3752 | we found an overlay which ends before PREV, the remaining | |
3753 | overlays are in correct order. */ | |
2410d73a | 3754 | while (tail) |
3b06f880 | 3755 | { |
2410d73a SM |
3756 | XSETMISC (tem, tail); |
3757 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3758 | |
3759 | if (end == pos) | |
3760 | { /* This overlay is disordered. */ | |
2410d73a | 3761 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3762 | |
3763 | /* Unlink the found overlay. */ | |
2410d73a SM |
3764 | tail = found->next; |
3765 | parent->next = tail; | |
1138e742 KR |
3766 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3767 | and link it into the right place. */ | |
2410d73a | 3768 | if (!right_pair) |
1138e742 | 3769 | { |
fd318b54 | 3770 | found->next = bp->overlays_before; |
0c94c8d6 | 3771 | set_buffer_overlays_before (bp, found); |
1138e742 KR |
3772 | } |
3773 | else | |
3774 | { | |
2410d73a SM |
3775 | found->next = right_pair->next; |
3776 | right_pair->next = found; | |
1138e742 | 3777 | } |
3b06f880 KH |
3778 | } |
3779 | else if (end == prev) | |
1138e742 KR |
3780 | { |
3781 | parent = tail; | |
2410d73a | 3782 | tail = tail->next; |
1138e742 | 3783 | } |
3b06f880 KH |
3784 | else /* No more disordered overlay. */ |
3785 | break; | |
3786 | } | |
3787 | } | |
2eec3b4e | 3788 | \f |
52f8ec73 | 3789 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3790 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3791 | (Lisp_Object object) |
52f8ec73 JB |
3792 | { |
3793 | return (OVERLAYP (object) ? Qt : Qnil); | |
3794 | } | |
3795 | ||
acac2700 | 3796 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3797 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3798 | If omitted, BUFFER defaults to the current buffer. |
3799 | BEG and END may be integers or markers. | |
a625ee20 RS |
3800 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3801 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3802 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3803 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3804 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3805 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3806 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3807 | { |
3808 | Lisp_Object overlay; | |
5c4f68f1 | 3809 | struct buffer *b; |
2eec3b4e | 3810 | |
5c4f68f1 | 3811 | if (NILP (buffer)) |
67180c6a | 3812 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3813 | else |
b7826503 | 3814 | CHECK_BUFFER (buffer); |
883047b9 JB |
3815 | if (MARKERP (beg) |
3816 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3817 | error ("Marker points into wrong buffer"); | |
3818 | if (MARKERP (end) | |
3819 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3820 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3821 | |
b7826503 PJ |
3822 | CHECK_NUMBER_COERCE_MARKER (beg); |
3823 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3824 | |
883047b9 | 3825 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3826 | { |
c99fc30f KH |
3827 | Lisp_Object temp; |
3828 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3829 | } |
883047b9 JB |
3830 | |
3831 | b = XBUFFER (buffer); | |
3832 | ||
3833 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3834 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3835 | |
acac2700 RS |
3836 | if (!NILP (front_advance)) |
3837 | XMARKER (beg)->insertion_type = 1; | |
3838 | if (!NILP (rear_advance)) | |
3839 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3840 | |
d7a7fda3 | 3841 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3842 | |
177c0ea7 | 3843 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3844 | end = OVERLAY_END (overlay); |
c2d5b10f | 3845 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3846 | { |
fd318b54 DA |
3847 | if (b->overlays_after) |
3848 | XOVERLAY (overlay)->next = b->overlays_after; | |
0c94c8d6 | 3849 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 3850 | } |
2eec3b4e | 3851 | else |
2410d73a | 3852 | { |
fd318b54 DA |
3853 | if (b->overlays_before) |
3854 | XOVERLAY (overlay)->next = b->overlays_before; | |
0c94c8d6 | 3855 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 3856 | } |
2eec3b4e RS |
3857 | |
3858 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3859 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3860 | |
b61982dd JB |
3861 | /* We don't need to redisplay the region covered by the overlay, because |
3862 | the overlay has no properties at the moment. */ | |
3863 | ||
2eec3b4e RS |
3864 | return overlay; |
3865 | } | |
876aa27c RS |
3866 | \f |
3867 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3868 | ||
3869 | static void | |
d311d28c | 3870 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3871 | { |
876aa27c RS |
3872 | if (start > end) |
3873 | { | |
d311d28c | 3874 | ptrdiff_t temp = start; |
26f545d7 GM |
3875 | start = end; |
3876 | end = temp; | |
876aa27c RS |
3877 | } |
3878 | ||
481b5054 | 3879 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3880 | |
876aa27c RS |
3881 | /* If this is a buffer not in the selected window, |
3882 | we must do other windows. */ | |
d3d50620 | 3883 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) |
876aa27c | 3884 | windows_or_buffers_changed = 1; |
876aa27c RS |
3885 | /* If multiple windows show this buffer, we must do other windows. */ |
3886 | else if (buffer_shared > 1) | |
3887 | windows_or_buffers_changed = 1; | |
18700091 KS |
3888 | /* If we modify an overlay at the end of the buffer, we cannot |
3889 | be sure that window end is still valid. */ | |
3890 | else if (end >= ZV && start <= ZV) | |
3891 | windows_or_buffers_changed = 1; | |
876aa27c | 3892 | |
d8b9150f | 3893 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3894 | } |
2eec3b4e | 3895 | |
7b7ae965 DA |
3896 | /* Remove OVERLAY from LIST. */ |
3897 | ||
2410d73a | 3898 | static struct Lisp_Overlay * |
d3da34e0 | 3899 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3900 | { |
7b7ae965 DA |
3901 | register struct Lisp_Overlay *tail, **prev = &list; |
3902 | ||
3903 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3904 | if (tail == overlay) | |
2410d73a | 3905 | { |
7b7ae965 | 3906 | *prev = overlay->next; |
2410d73a SM |
3907 | overlay->next = NULL; |
3908 | break; | |
3909 | } | |
3910 | return list; | |
3911 | } | |
3912 | ||
4cb3e6b3 DA |
3913 | /* Remove OVERLAY from both overlay lists of B. */ |
3914 | ||
3915 | static void | |
3916 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3917 | { | |
3918 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3919 | ||
0c94c8d6 PE |
3920 | set_buffer_overlays_before (b, unchain_overlay (b->overlays_before, ov)); |
3921 | set_buffer_overlays_after (b, unchain_overlay (b->overlays_after, ov)); | |
fd318b54 | 3922 | eassert (XOVERLAY (overlay)->next == NULL); |
4cb3e6b3 DA |
3923 | } |
3924 | ||
5c4f68f1 | 3925 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3926 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3927 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3928 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3929 | buffer. */) |
5842a27b | 3930 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3931 | { |
471fe23d | 3932 | struct buffer *b, *ob = 0; |
0a4469c9 | 3933 | Lisp_Object obuffer; |
d311d28c | 3934 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3935 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3936 | |
b7826503 | 3937 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3938 | if (NILP (buffer)) |
3939 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3940 | if (NILP (buffer)) |
67180c6a | 3941 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3942 | CHECK_BUFFER (buffer); |
883047b9 | 3943 | |
471fe23d TN |
3944 | if (NILP (Fbuffer_live_p (buffer))) |
3945 | error ("Attempt to move overlay to a dead buffer"); | |
3946 | ||
883047b9 JB |
3947 | if (MARKERP (beg) |
3948 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3949 | error ("Marker points into wrong buffer"); | |
3950 | if (MARKERP (end) | |
3951 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3952 | error ("Marker points into wrong buffer"); | |
3953 | ||
b7826503 PJ |
3954 | CHECK_NUMBER_COERCE_MARKER (beg); |
3955 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3956 | |
471fe23d | 3957 | if (XINT (beg) > XINT (end)) |
02481186 | 3958 | { |
471fe23d TN |
3959 | Lisp_Object temp; |
3960 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3961 | } |
3962 | ||
9d7608b7 KH |
3963 | specbind (Qinhibit_quit, Qt); |
3964 | ||
0a4469c9 | 3965 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3966 | b = XBUFFER (buffer); |
471fe23d TN |
3967 | |
3968 | if (!NILP (obuffer)) | |
3969 | { | |
3970 | ob = XBUFFER (obuffer); | |
3971 | ||
3972 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3973 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3974 | ||
4cb3e6b3 | 3975 | unchain_both (ob, overlay); |
471fe23d TN |
3976 | } |
3977 | ||
3978 | /* Set the overlay boundaries, which may clip them. */ | |
3979 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3980 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3981 | ||
3982 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3983 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3984 | |
c82ed728 | 3985 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3986 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3987 | { |
3988 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3989 | if (ob) |
3990 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3991 | |
3992 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3993 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3994 | } |
c82ed728 JB |
3995 | else |
3996 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3997 | { | |
79cce3f2 PE |
3998 | if (o_beg == n_beg) |
3999 | modify_overlay (b, o_end, n_end); | |
4000 | else if (o_end == n_end) | |
4001 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 4002 | else |
79cce3f2 | 4003 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 4004 | } |
b61982dd | 4005 | |
471fe23d TN |
4006 | /* Delete the overlay if it is empty after clipping and has the |
4007 | evaporate property. */ | |
4008 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
4009 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 4010 | |
471fe23d TN |
4011 | /* Put the overlay into the new buffer's overlay lists, first on the |
4012 | wrong list. */ | |
4013 | if (n_end < b->overlay_center) | |
2410d73a | 4014 | { |
fd318b54 | 4015 | XOVERLAY (overlay)->next = b->overlays_after; |
0c94c8d6 | 4016 | set_buffer_overlays_after (b, XOVERLAY (overlay)); |
2410d73a | 4017 | } |
2eec3b4e | 4018 | else |
2410d73a | 4019 | { |
fd318b54 | 4020 | XOVERLAY (overlay)->next = b->overlays_before; |
0c94c8d6 | 4021 | set_buffer_overlays_before (b, XOVERLAY (overlay)); |
2410d73a | 4022 | } |
2eec3b4e RS |
4023 | |
4024 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 4025 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 4026 | |
0a4469c9 | 4027 | return unbind_to (count, overlay); |
2eec3b4e RS |
4028 | } |
4029 | ||
4030 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 4031 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 4032 | (Lisp_Object overlay) |
2eec3b4e | 4033 | { |
0a4469c9 | 4034 | Lisp_Object buffer; |
5c4f68f1 | 4035 | struct buffer *b; |
d311d28c | 4036 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 4037 | |
b7826503 | 4038 | CHECK_OVERLAY (overlay); |
52f8ec73 | 4039 | |
0a4469c9 RS |
4040 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4041 | if (NILP (buffer)) | |
4042 | return Qnil; | |
4043 | ||
4044 | b = XBUFFER (buffer); | |
0a4469c9 | 4045 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 4046 | |
4cb3e6b3 | 4047 | unchain_both (b, overlay); |
041a49a6 | 4048 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 4049 | |
e58c389d | 4050 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
4051 | display optimizations for the affected buffer, on the basis that |
4052 | these strings may contain newlines. This is easier to do than to | |
4053 | check for that situation during redisplay. */ | |
4054 | if (!windows_or_buffers_changed | |
4055 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4056 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4057 | b->prevent_redisplay_optimizations_p = 1; | |
4058 | ||
0a4469c9 | 4059 | return unbind_to (count, Qnil); |
2eec3b4e | 4060 | } |
c5e28e39 MR |
4061 | |
4062 | DEFUN ("delete-all-overlays", Fdelete_all_overlays, Sdelete_all_overlays, 0, 1, 0, | |
4063 | doc: /* Delete all overlays of BUFFER. | |
4064 | BUFFER omitted or nil means delete all overlays of the current | |
4065 | buffer. */) | |
4066 | (Lisp_Object buffer) | |
4067 | { | |
4068 | register struct buffer *buf; | |
4069 | ||
4070 | if (NILP (buffer)) | |
4071 | buf = current_buffer; | |
4072 | else | |
4073 | { | |
4074 | CHECK_BUFFER (buffer); | |
4075 | buf = XBUFFER (buffer); | |
4076 | } | |
4077 | ||
4078 | delete_all_overlays (buf); | |
26d4541d | 4079 | return Qnil; |
c5e28e39 | 4080 | } |
2eec3b4e | 4081 | \f |
8ebafa8d JB |
4082 | /* Overlay dissection functions. */ |
4083 | ||
a7ca3326 | 4084 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 4085 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 4086 | (Lisp_Object overlay) |
8ebafa8d | 4087 | { |
b7826503 | 4088 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4089 | |
4090 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4091 | } | |
4092 | ||
a7ca3326 | 4093 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 4094 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 4095 | (Lisp_Object overlay) |
8ebafa8d | 4096 | { |
b7826503 | 4097 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4098 | |
4099 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4100 | } | |
4101 | ||
4102 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4103 | doc: /* Return the buffer OVERLAY belongs to. |
4104 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 4105 | (Lisp_Object overlay) |
8ebafa8d | 4106 | { |
b7826503 | 4107 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4108 | |
4109 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4110 | } | |
4111 | ||
4112 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4113 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4114 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 4115 | OVERLAY. */) |
5842a27b | 4116 | (Lisp_Object overlay) |
8ebafa8d | 4117 | { |
b7826503 | 4118 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4119 | |
c644523b | 4120 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4121 | } |
4122 | ||
4123 | \f | |
2eec3b4e | 4124 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4125 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 4126 | (Lisp_Object pos) |
2eec3b4e | 4127 | { |
b081724f | 4128 | ptrdiff_t len, noverlays; |
2eec3b4e | 4129 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
4130 | Lisp_Object result; |
4131 | ||
b7826503 | 4132 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4133 | |
4134 | len = 10; | |
a9800ae8 | 4135 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 4136 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4137 | |
4138 | /* Put all the overlays we want in a vector in overlay_vec. | |
4139 | Store the length in len. */ | |
2a77a7d7 | 4140 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4141 | 0, 0, 0); |
2eec3b4e RS |
4142 | |
4143 | /* Make a list of them all. */ | |
4144 | result = Flist (noverlays, overlay_vec); | |
4145 | ||
9ac0d9e0 | 4146 | xfree (overlay_vec); |
2eec3b4e RS |
4147 | return result; |
4148 | } | |
4149 | ||
74514898 | 4150 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4151 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4152 | Overlap means that at least one character is contained within the overlay |
4153 | and also contained within the specified region. | |
7723e095 MR |
4154 | Empty overlays are included in the result if they are located at BEG, |
4155 | between BEG and END, or at END provided END denotes the position at the | |
4156 | end of the buffer. */) | |
5842a27b | 4157 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 4158 | { |
21514da7 | 4159 | ptrdiff_t len, noverlays; |
74514898 | 4160 | Lisp_Object *overlay_vec; |
74514898 RS |
4161 | Lisp_Object result; |
4162 | ||
b7826503 PJ |
4163 | CHECK_NUMBER_COERCE_MARKER (beg); |
4164 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4165 | |
4166 | len = 10; | |
38182d90 | 4167 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
4168 | |
4169 | /* Put all the overlays we want in a vector in overlay_vec. | |
4170 | Store the length in len. */ | |
4171 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4172 | NULL, NULL); |
74514898 RS |
4173 | |
4174 | /* Make a list of them all. */ | |
4175 | result = Flist (noverlays, overlay_vec); | |
4176 | ||
4177 | xfree (overlay_vec); | |
4178 | return result; | |
4179 | } | |
4180 | ||
a7ca3326 | 4181 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4182 | 1, 1, 0, |
7ee72033 | 4183 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4184 | If there are no overlay boundaries from POS to (point-max), |
4185 | the value is (point-max). */) | |
5842a27b | 4186 | (Lisp_Object pos) |
2eec3b4e | 4187 | { |
b081724f | 4188 | ptrdiff_t i, len, noverlays; |
d311d28c | 4189 | ptrdiff_t endpos; |
2eec3b4e | 4190 | Lisp_Object *overlay_vec; |
2eec3b4e | 4191 | |
b7826503 | 4192 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4193 | |
4194 | len = 10; | |
38182d90 | 4195 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
4196 | |
4197 | /* Put all the overlays we want in a vector in overlay_vec. | |
4198 | Store the length in len. | |
4199 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4200 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4201 | &endpos, 0, 1); |
2eec3b4e RS |
4202 | |
4203 | /* If any of these overlays ends before endpos, | |
4204 | use its ending point instead. */ | |
4205 | for (i = 0; i < noverlays; i++) | |
4206 | { | |
4207 | Lisp_Object oend; | |
d311d28c | 4208 | ptrdiff_t oendpos; |
2eec3b4e RS |
4209 | |
4210 | oend = OVERLAY_END (overlay_vec[i]); | |
4211 | oendpos = OVERLAY_POSITION (oend); | |
4212 | if (oendpos < endpos) | |
4213 | endpos = oendpos; | |
1ab256cb RM |
4214 | } |
4215 | ||
9ac0d9e0 | 4216 | xfree (overlay_vec); |
2eec3b4e RS |
4217 | return make_number (endpos); |
4218 | } | |
239c932b | 4219 | |
a7ca3326 | 4220 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4221 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4222 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4223 | If there are no overlay boundaries from (point-min) to POS, |
4224 | the value is (point-min). */) | |
5842a27b | 4225 | (Lisp_Object pos) |
239c932b | 4226 | { |
d311d28c | 4227 | ptrdiff_t prevpos; |
239c932b | 4228 | Lisp_Object *overlay_vec; |
b081724f | 4229 | ptrdiff_t len; |
239c932b | 4230 | |
b7826503 | 4231 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4232 | |
624bbdc4 RS |
4233 | /* At beginning of buffer, we know the answer; |
4234 | avoid bug subtracting 1 below. */ | |
4235 | if (XINT (pos) == BEGV) | |
4236 | return pos; | |
4237 | ||
017f0539 | 4238 | len = 10; |
38182d90 | 4239 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4240 | |
239c932b RS |
4241 | /* Put all the overlays we want in a vector in overlay_vec. |
4242 | Store the length in len. | |
daa1c109 | 4243 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4244 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4245 | 0, &prevpos, 1); |
239c932b | 4246 | |
239c932b RS |
4247 | xfree (overlay_vec); |
4248 | return make_number (prevpos); | |
4249 | } | |
2eec3b4e RS |
4250 | \f |
4251 | /* These functions are for debugging overlays. */ | |
4252 | ||
4253 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4254 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4255 | The car has all the overlays before the overlay center; |
4256 | the cdr has all the overlays after the overlay center. | |
4257 | Recentering overlays moves overlays between these lists. | |
4258 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4259 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4260 | (void) |
2eec3b4e | 4261 | { |
2410d73a SM |
4262 | struct Lisp_Overlay *ol; |
4263 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 | 4264 | |
fd318b54 | 4265 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) |
2410d73a SM |
4266 | { |
4267 | XSETMISC (tmp, ol); | |
4268 | before = Fcons (tmp, before); | |
4269 | } | |
fd318b54 | 4270 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) |
2410d73a SM |
4271 | { |
4272 | XSETMISC (tmp, ol); | |
4273 | after = Fcons (tmp, after); | |
4274 | } | |
4cb3e6b3 | 4275 | |
2410d73a | 4276 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4277 | } |
4278 | ||
4279 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4280 | doc: /* Recenter the overlays of the current buffer around position POS. |
4281 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4282 | for positions far away from POS). */) | |
5842a27b | 4283 | (Lisp_Object pos) |
2eec3b4e | 4284 | { |
d311d28c | 4285 | ptrdiff_t p; |
b7826503 | 4286 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4287 | |
d311d28c PE |
4288 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4289 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4290 | return Qnil; |
4291 | } | |
4292 | \f | |
a7ca3326 | 4293 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4294 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4295 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4296 | { |
b7826503 | 4297 | CHECK_OVERLAY (overlay); |
c644523b | 4298 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4299 | } |
4300 | ||
4301 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4302 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4303 | VALUE will be returned.*/) | |
5842a27b | 4304 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4305 | { |
48e2e3ba | 4306 | Lisp_Object tail, buffer; |
37ef52bb | 4307 | bool changed; |
2eec3b4e | 4308 | |
b7826503 | 4309 | CHECK_OVERLAY (overlay); |
b61982dd | 4310 | |
274a9425 RS |
4311 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4312 | ||
c644523b | 4313 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4314 | CONSP (tail) && CONSP (XCDR (tail)); |
4315 | tail = XCDR (XCDR (tail))) | |
4316 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4317 | { |
7539e11f | 4318 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4319 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4320 | goto found; |
274a9425 | 4321 | } |
9d7608b7 KH |
4322 | /* It wasn't in the list, so add it to the front. */ |
4323 | changed = !NILP (value); | |
c644523b DA |
4324 | set_overlay_plist |
4325 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4326 | found: |
4327 | if (! NILP (buffer)) | |
4328 | { | |
4329 | if (changed) | |
876aa27c | 4330 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4331 | marker_position (OVERLAY_START (overlay)), |
4332 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4333 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4334 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4335 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4336 | Fdelete_overlay (overlay); | |
4337 | } | |
7d63db98 | 4338 | |
2eec3b4e | 4339 | return value; |
1ab256cb RM |
4340 | } |
4341 | \f | |
9115729e KH |
4342 | /* Subroutine of report_overlay_modification. */ |
4343 | ||
4344 | /* Lisp vector holding overlay hook functions to call. | |
4345 | Vector elements come in pairs. | |
4346 | Each even-index element is a list of hook functions. | |
4347 | The following odd-index element is the overlay they came from. | |
4348 | ||
4349 | Before the buffer change, we fill in this vector | |
4350 | as we call overlay hook functions. | |
4351 | After the buffer change, we get the functions to call from this vector. | |
4352 | This way we always call the same functions before and after the change. */ | |
4353 | static Lisp_Object last_overlay_modification_hooks; | |
4354 | ||
4355 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4356 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4357 | |
4358 | /* Add one functionlist/overlay pair | |
4359 | to the end of last_overlay_modification_hooks. */ | |
4360 | ||
4361 | static void | |
d3da34e0 | 4362 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4363 | { |
d311d28c | 4364 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4365 | |
d311d28c PE |
4366 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4367 | last_overlay_modification_hooks = | |
4368 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4369 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4370 | functionlist); last_overlay_modification_hooks_used++; | |
4371 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4372 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4373 | } |
4374 | \f | |
173f2a64 RS |
4375 | /* Run the modification-hooks of overlays that include |
4376 | any part of the text in START to END. | |
9115729e KH |
4377 | If this change is an insertion, also |
4378 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4379 | and the insert-after-hooks of overlay ending at START. |
4380 | ||
4381 | This is called both before and after the modification. | |
37ef52bb | 4382 | AFTER is true when we call after the modification. |
930a9140 | 4383 | |
9115729e KH |
4384 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4385 | When AFTER is nonzero, they are the start position, | |
4386 | the position after the inserted new text, | |
4387 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4388 | |
4389 | void | |
37ef52bb | 4390 | report_overlay_modification (Lisp_Object start, Lisp_Object end, bool after, |
d3da34e0 | 4391 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4392 | { |
2410d73a SM |
4393 | Lisp_Object prop, overlay; |
4394 | struct Lisp_Overlay *tail; | |
37ef52bb PE |
4395 | /* True if this change is an insertion. */ |
4396 | bool insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4397 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4398 | |
4399 | overlay = Qnil; | |
2410d73a | 4400 | tail = NULL; |
9115729e | 4401 | |
27c6b98e SM |
4402 | /* We used to run the functions as soon as we found them and only register |
4403 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4404 | case. But running elisp code as we traverse the list of overlays is | |
4405 | painful because the list can be modified by the elisp code so we had to | |
4406 | copy at several places. We now simply do a read-only traversal that | |
4407 | only collects the functions to run and we run them afterwards. It's | |
4408 | simpler, especially since all the code was already there. -stef */ | |
4409 | ||
a615c6dc | 4410 | if (!after) |
173f2a64 | 4411 | { |
a615c6dc SM |
4412 | /* We are being called before a change. |
4413 | Scan the overlays to find the functions to call. */ | |
4414 | last_overlay_modification_hooks_used = 0; | |
fd318b54 | 4415 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4416 | { |
d311d28c | 4417 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4418 | Lisp_Object ostart, oend; |
4419 | ||
2410d73a | 4420 | XSETMISC (overlay, tail); |
a615c6dc SM |
4421 | |
4422 | ostart = OVERLAY_START (overlay); | |
4423 | oend = OVERLAY_END (overlay); | |
4424 | endpos = OVERLAY_POSITION (oend); | |
4425 | if (XFASTINT (start) > endpos) | |
4426 | break; | |
4427 | startpos = OVERLAY_POSITION (ostart); | |
4428 | if (insertion && (XFASTINT (start) == startpos | |
4429 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4430 | { |
a615c6dc SM |
4431 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4432 | if (!NILP (prop)) | |
4433 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4434 | } |
a615c6dc SM |
4435 | if (insertion && (XFASTINT (start) == endpos |
4436 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4437 | { |
a615c6dc SM |
4438 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4439 | if (!NILP (prop)) | |
4440 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4441 | } |
a615c6dc SM |
4442 | /* Test for intersecting intervals. This does the right thing |
4443 | for both insertion and deletion. */ | |
4444 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4445 | { |
a615c6dc SM |
4446 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4447 | if (!NILP (prop)) | |
4448 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4449 | } |
173f2a64 | 4450 | } |
60ebfdf3 | 4451 | |
fd318b54 | 4452 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4453 | { |
d311d28c | 4454 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4455 | Lisp_Object ostart, oend; |
4456 | ||
2410d73a | 4457 | XSETMISC (overlay, tail); |
a615c6dc SM |
4458 | |
4459 | ostart = OVERLAY_START (overlay); | |
4460 | oend = OVERLAY_END (overlay); | |
4461 | startpos = OVERLAY_POSITION (ostart); | |
4462 | endpos = OVERLAY_POSITION (oend); | |
4463 | if (XFASTINT (end) < startpos) | |
4464 | break; | |
4465 | if (insertion && (XFASTINT (start) == startpos | |
4466 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4467 | { |
a615c6dc SM |
4468 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4469 | if (!NILP (prop)) | |
4470 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4471 | } |
a615c6dc SM |
4472 | if (insertion && (XFASTINT (start) == endpos |
4473 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4474 | { |
a615c6dc SM |
4475 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4476 | if (!NILP (prop)) | |
4477 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4478 | } |
a615c6dc SM |
4479 | /* Test for intersecting intervals. This does the right thing |
4480 | for both insertion and deletion. */ | |
4481 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4482 | { |
a615c6dc SM |
4483 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4484 | if (!NILP (prop)) | |
4485 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4486 | } |
173f2a64 RS |
4487 | } |
4488 | } | |
55b48893 | 4489 | |
a615c6dc SM |
4490 | GCPRO4 (overlay, arg1, arg2, arg3); |
4491 | { | |
4492 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4493 | First copy the vector contents, in case some of these hooks | |
4494 | do subsequent modification of the buffer. */ | |
d311d28c | 4495 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4496 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4497 | ptrdiff_t i; |
a615c6dc | 4498 | |
72af86bd | 4499 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4500 | size * word_size); |
a615c6dc SM |
4501 | gcpro1.var = copy; |
4502 | gcpro1.nvars = size; | |
4503 | ||
4504 | for (i = 0; i < size;) | |
4505 | { | |
8f54f30a PE |
4506 | Lisp_Object prop_i, overlay_i; |
4507 | prop_i = copy[i++]; | |
4508 | overlay_i = copy[i++]; | |
4509 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4510 | } |
4511 | } | |
55b48893 | 4512 | UNGCPRO; |
173f2a64 RS |
4513 | } |
4514 | ||
4515 | static void | |
37ef52bb | 4516 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, bool after, |
d3da34e0 | 4517 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
173f2a64 | 4518 | { |
930a9140 | 4519 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4520 | |
930a9140 | 4521 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4522 | |
6d70a280 | 4523 | while (CONSP (list)) |
173f2a64 | 4524 | { |
930a9140 | 4525 | if (NILP (arg3)) |
6d70a280 | 4526 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4527 | else |
6d70a280 SM |
4528 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4529 | list = XCDR (list); | |
173f2a64 RS |
4530 | } |
4531 | UNGCPRO; | |
4532 | } | |
9d7608b7 KH |
4533 | |
4534 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4535 | property is set. */ | |
4536 | void | |
d311d28c | 4537 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4538 | { |
2410d73a SM |
4539 | Lisp_Object overlay, hit_list; |
4540 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4541 | |
4542 | hit_list = Qnil; | |
c2d5b10f | 4543 | if (pos <= current_buffer->overlay_center) |
fd318b54 | 4544 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4545 | { |
d311d28c | 4546 | ptrdiff_t endpos; |
2410d73a | 4547 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4548 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4549 | if (endpos < pos) | |
4550 | break; | |
4551 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4552 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4553 | hit_list = Fcons (overlay, hit_list); |
4554 | } | |
4555 | else | |
fd318b54 | 4556 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4557 | { |
d311d28c | 4558 | ptrdiff_t startpos; |
2410d73a | 4559 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4560 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4561 | if (startpos > pos) | |
4562 | break; | |
4563 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4564 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4565 | hit_list = Fcons (overlay, hit_list); |
4566 | } | |
7539e11f KR |
4567 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4568 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4569 | } |
173f2a64 | 4570 | \f |
54dfdeb0 | 4571 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4572 | in the slot with offset OFFSET. */ |
4573 | ||
0fa3ba92 | 4574 | void |
d3da34e0 | 4575 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4576 | { |
ad97b375 | 4577 | Lisp_Object predicate; |
177c0ea7 | 4578 | |
64e16c3c | 4579 | switch (type) |
0fa3ba92 | 4580 | { |
2de9f71c | 4581 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4582 | case Lisp_String: predicate = Qstringp; break; |
4583 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
1088b922 | 4584 | default: emacs_abort (); |
0fa3ba92 JB |
4585 | } |
4586 | ||
ad97b375 | 4587 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4588 | } |
7c02e886 | 4589 | |
0fa3ba92 | 4590 | \f |
b86af064 GM |
4591 | /*********************************************************************** |
4592 | Allocation with mmap | |
4593 | ***********************************************************************/ | |
4594 | ||
4595 | #ifdef USE_MMAP_FOR_BUFFERS | |
4596 | ||
4597 | #include <sys/types.h> | |
4598 | #include <sys/mman.h> | |
4599 | ||
4600 | #ifndef MAP_ANON | |
4601 | #ifdef MAP_ANONYMOUS | |
4602 | #define MAP_ANON MAP_ANONYMOUS | |
4603 | #else | |
4604 | #define MAP_ANON 0 | |
4605 | #endif | |
4606 | #endif | |
4607 | ||
09dfdf85 GM |
4608 | #ifndef MAP_FAILED |
4609 | #define MAP_FAILED ((void *) -1) | |
4610 | #endif | |
4611 | ||
b86af064 | 4612 | #include <stdio.h> |
b86af064 GM |
4613 | |
4614 | #if MAP_ANON == 0 | |
4615 | #include <fcntl.h> | |
4616 | #endif | |
4617 | ||
4618 | #include "coding.h" | |
4619 | ||
4620 | ||
4621 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4622 | The current implementation lets the system select mapped | |
4623 | addresses; we're not using MAP_FIXED in general, except when | |
4624 | trying to enlarge regions. | |
4625 | ||
4626 | Each mapped region starts with a mmap_region structure, the user | |
4627 | area starts after that structure, aligned to MEM_ALIGN. | |
4628 | ||
4629 | +-----------------------+ | |
4630 | | struct mmap_info + | | |
4631 | | padding | | |
4632 | +-----------------------+ | |
4633 | | user data | | |
4634 | | | | |
4635 | | | | |
4636 | +-----------------------+ */ | |
4637 | ||
4638 | struct mmap_region | |
4639 | { | |
4640 | /* User-specified size. */ | |
4641 | size_t nbytes_specified; | |
177c0ea7 | 4642 | |
b86af064 GM |
4643 | /* Number of bytes mapped */ |
4644 | size_t nbytes_mapped; | |
4645 | ||
4646 | /* Pointer to the location holding the address of the memory | |
4647 | allocated with the mmap'd block. The variable actually points | |
4648 | after this structure. */ | |
261cb4bb | 4649 | void **var; |
b86af064 GM |
4650 | |
4651 | /* Next and previous in list of all mmap'd regions. */ | |
4652 | struct mmap_region *next, *prev; | |
4653 | }; | |
4654 | ||
4655 | /* Doubly-linked list of mmap'd regions. */ | |
4656 | ||
4657 | static struct mmap_region *mmap_regions; | |
4658 | ||
4659 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4660 | /dev/zero will be opened on it. */ | |
4661 | ||
4662 | static int mmap_fd; | |
4663 | ||
4664 | /* Temporary storage for mmap_set_vars, see there. */ | |
4665 | ||
4666 | static struct mmap_region *mmap_regions_1; | |
4667 | static int mmap_fd_1; | |
4668 | ||
4669 | /* Page size on this system. */ | |
4670 | ||
4671 | static int mmap_page_size; | |
4672 | ||
cd1181db | 4673 | /* 1 means mmap has been initialized. */ |
b86af064 | 4674 | |
37ef52bb | 4675 | static bool mmap_initialized_p; |
b86af064 GM |
4676 | |
4677 | /* Value is X rounded up to the next multiple of N. */ | |
4678 | ||
4679 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4680 | ||
4681 | /* Size of mmap_region structure plus padding. */ | |
4682 | ||
4683 | #define MMAP_REGION_STRUCT_SIZE \ | |
4684 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4685 | ||
4686 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4687 | region, return a pointer to the start of the region. */ | |
4688 | ||
4689 | #define MMAP_REGION(P) \ | |
4690 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4691 | ||
4692 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4693 | to the start of the user-visible part of the region. */ | |
4694 | ||
4695 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4696 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4697 | |
4698 | #define MEM_ALIGN sizeof (double) | |
4699 | ||
7273faa1 DL |
4700 | /* Predicate returning true if part of the address range [START .. END] |
4701 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4702 | memory mapping. |
4703 | ||
da6062e6 | 4704 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4705 | something else. This can be overridden by system configuration |
4706 | files if system-specific means to determine this exists. */ | |
4707 | ||
4708 | #ifndef MMAP_ALLOCATED_P | |
4709 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4710 | #endif | |
4711 | ||
53964682 | 4712 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4713 | |
1dae0f0a AS |
4714 | static void |
4715 | mmap_init (void) | |
4716 | { | |
4717 | #if MAP_ANON == 0 | |
4718 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4719 | in a dumped Emacs. */ | |
4720 | if (mmap_fd <= 0) | |
4721 | { | |
4722 | /* No anonymous mmap -- we need the file descriptor. */ | |
4723 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4724 | if (mmap_fd == -1) | |
4725 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4726 | } | |
4727 | #endif /* MAP_ANON == 0 */ | |
4728 | ||
4729 | if (mmap_initialized_p) | |
4730 | return; | |
4731 | mmap_initialized_p = 1; | |
b86af064 | 4732 | |
1dae0f0a AS |
4733 | #if MAP_ANON != 0 |
4734 | mmap_fd = -1; | |
4735 | #endif | |
4736 | ||
4737 | mmap_page_size = getpagesize (); | |
4738 | } | |
b86af064 GM |
4739 | |
4740 | /* Return a region overlapping address range START...END, or null if | |
4741 | none. END is not including, i.e. the last byte in the range | |
4742 | is at END - 1. */ | |
4743 | ||
4744 | static struct mmap_region * | |
261cb4bb | 4745 | mmap_find (void *start, void *end) |
b86af064 GM |
4746 | { |
4747 | struct mmap_region *r; | |
4748 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4749 | |
b86af064 GM |
4750 | for (r = mmap_regions; r; r = r->next) |
4751 | { | |
4752 | char *rstart = (char *) r; | |
4753 | char *rend = rstart + r->nbytes_mapped; | |
4754 | ||
4755 | if (/* First byte of range, i.e. START, in this region? */ | |
4756 | (s >= rstart && s < rend) | |
4757 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4758 | || (e > rstart && e <= rend) | |
4759 | /* First byte of this region in the range? */ | |
4760 | || (rstart >= s && rstart < e) | |
4761 | /* Last byte of this region in the range? */ | |
4762 | || (rend > s && rend <= e)) | |
4763 | break; | |
4764 | } | |
4765 | ||
4766 | return r; | |
4767 | } | |
4768 | ||
4769 | ||
4770 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
37ef52bb | 4771 | the region. */ |
b86af064 | 4772 | |
37ef52bb | 4773 | static void |
1dae0f0a | 4774 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4775 | { |
4776 | if (r->next) | |
4777 | r->next->prev = r->prev; | |
4778 | if (r->prev) | |
4779 | r->prev->next = r->next; | |
4780 | else | |
4781 | mmap_regions = r->next; | |
177c0ea7 | 4782 | |
261cb4bb | 4783 | if (munmap (r, r->nbytes_mapped) == -1) |
37ef52bb | 4784 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); |
b86af064 GM |
4785 | } |
4786 | ||
4787 | ||
4788 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
37ef52bb | 4789 | Value is true if successful. */ |
b86af064 | 4790 | |
37ef52bb | 4791 | static bool |
1dae0f0a | 4792 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4793 | { |
4794 | char *region_end = (char *) r + r->nbytes_mapped; | |
4795 | size_t nbytes; | |
37ef52bb | 4796 | bool success = 0; |
b86af064 GM |
4797 | |
4798 | if (npages < 0) | |
4799 | { | |
4800 | /* Unmap pages at the end of the region. */ | |
4801 | nbytes = - npages * mmap_page_size; | |
4802 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4803 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4804 | else | |
4805 | { | |
4806 | r->nbytes_mapped -= nbytes; | |
4807 | success = 1; | |
4808 | } | |
4809 | } | |
4810 | else if (npages > 0) | |
4811 | { | |
b86af064 | 4812 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4813 | |
b86af064 GM |
4814 | /* Try to map additional pages at the end of the region. We |
4815 | cannot do this if the address range is already occupied by | |
4816 | something else because mmap deletes any previous mapping. | |
4817 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4818 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4819 | { |
261cb4bb | 4820 | void *p; |
177c0ea7 | 4821 | |
b86af064 GM |
4822 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4823 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4824 | if (p == MAP_FAILED) | |
edaa9aed | 4825 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4826 | else if (p != region_end) |
b86af064 GM |
4827 | { |
4828 | /* Kernels are free to choose a different address. In | |
4829 | that case, unmap what we've mapped above; we have | |
4830 | no use for it. */ | |
4831 | if (munmap (p, nbytes) == -1) | |
4832 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4833 | } | |
4834 | else | |
4835 | { | |
4836 | r->nbytes_mapped += nbytes; | |
4837 | success = 1; | |
4838 | } | |
4839 | } | |
4840 | } | |
4841 | ||
4842 | return success; | |
4843 | } | |
4844 | ||
4845 | ||
37ef52bb PE |
4846 | /* Set or reset variables holding references to mapped regions. |
4847 | If not RESTORE_P, set all variables to null. If RESTORE_P, set all | |
4848 | variables to the start of the user-areas of mapped regions. | |
b86af064 GM |
4849 | |
4850 | This function is called from Fdump_emacs to ensure that the dumped | |
4851 | Emacs doesn't contain references to memory that won't be mapped | |
4852 | when Emacs starts. */ | |
4853 | ||
4854 | void | |
37ef52bb | 4855 | mmap_set_vars (bool restore_p) |
b86af064 GM |
4856 | { |
4857 | struct mmap_region *r; | |
4858 | ||
4859 | if (restore_p) | |
4860 | { | |
4861 | mmap_regions = mmap_regions_1; | |
4862 | mmap_fd = mmap_fd_1; | |
4863 | for (r = mmap_regions; r; r = r->next) | |
4864 | *r->var = MMAP_USER_AREA (r); | |
4865 | } | |
4866 | else | |
4867 | { | |
4868 | for (r = mmap_regions; r; r = r->next) | |
4869 | *r->var = NULL; | |
4870 | mmap_regions_1 = mmap_regions; | |
4871 | mmap_regions = NULL; | |
4872 | mmap_fd_1 = mmap_fd; | |
4873 | mmap_fd = -1; | |
4874 | } | |
4875 | } | |
4876 | ||
4877 | ||
4878 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4879 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4880 | address of some variable which will use the data area. | |
4881 | ||
4882 | The allocation of 0 bytes is valid. | |
4883 | ||
4884 | If we can't allocate the necessary memory, set *VAR to null, and | |
4885 | return null. */ | |
4886 | ||
261cb4bb PE |
4887 | static void * |
4888 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4889 | { |
4890 | void *p; | |
4891 | size_t map; | |
4892 | ||
4893 | mmap_init (); | |
4894 | ||
4895 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4896 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4897 | mmap_fd, 0); | |
177c0ea7 | 4898 | |
b86af064 GM |
4899 | if (p == MAP_FAILED) |
4900 | { | |
4901 | if (errno != ENOMEM) | |
4902 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4903 | p = NULL; | |
4904 | } | |
4905 | else | |
4906 | { | |
4907 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4908 | |
b86af064 GM |
4909 | r->nbytes_specified = nbytes; |
4910 | r->nbytes_mapped = map; | |
4911 | r->var = var; | |
4912 | r->prev = NULL; | |
4913 | r->next = mmap_regions; | |
4914 | if (r->next) | |
4915 | r->next->prev = r; | |
4916 | mmap_regions = r; | |
177c0ea7 | 4917 | |
b86af064 GM |
4918 | p = MMAP_USER_AREA (p); |
4919 | } | |
177c0ea7 | 4920 | |
b86af064 GM |
4921 | return *var = p; |
4922 | } | |
4923 | ||
4924 | ||
1dae0f0a AS |
4925 | /* Free a block of relocatable storage whose data is pointed to by |
4926 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4927 | ||
4928 | static void | |
261cb4bb | 4929 | mmap_free (void **var) |
1dae0f0a AS |
4930 | { |
4931 | mmap_init (); | |
4932 | ||
4933 | if (*var) | |
4934 | { | |
4935 | mmap_free_1 (MMAP_REGION (*var)); | |
4936 | *var = NULL; | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | ||
b86af064 GM |
4941 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4942 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4943 | and return this value. If more memory cannot be allocated, then | |
4944 | leave *VAR unchanged, and return null. */ | |
4945 | ||
261cb4bb PE |
4946 | static void * |
4947 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4948 | { |
261cb4bb | 4949 | void *result; |
177c0ea7 | 4950 | |
b86af064 GM |
4951 | mmap_init (); |
4952 | ||
4953 | if (*var == NULL) | |
4954 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4955 | else if (nbytes == 0) |
b86af064 GM |
4956 | { |
4957 | mmap_free (var); | |
4958 | result = mmap_alloc (var, nbytes); | |
4959 | } | |
4960 | else | |
4961 | { | |
4962 | struct mmap_region *r = MMAP_REGION (*var); | |
4963 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4964 | |
b86af064 GM |
4965 | if (room < nbytes) |
4966 | { | |
4967 | /* Must enlarge. */ | |
261cb4bb | 4968 | void *old_ptr = *var; |
b86af064 GM |
4969 | |
4970 | /* Try to map additional pages at the end of the region. | |
4971 | If that fails, allocate a new region, copy data | |
4972 | from the old region, then free it. */ | |
4973 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4974 | / mmap_page_size))) | |
4975 | { | |
4976 | r->nbytes_specified = nbytes; | |
4977 | *var = result = old_ptr; | |
4978 | } | |
4979 | else if (mmap_alloc (var, nbytes)) | |
4980 | { | |
72af86bd | 4981 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4982 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4983 | result = *var; | |
4984 | r = MMAP_REGION (result); | |
4985 | r->nbytes_specified = nbytes; | |
4986 | } | |
4987 | else | |
4988 | { | |
4989 | *var = old_ptr; | |
4990 | result = NULL; | |
4991 | } | |
4992 | } | |
4993 | else if (room - nbytes >= mmap_page_size) | |
4994 | { | |
4995 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4996 | memory back to the system. |
4997 | ||
4998 | The extra parens are to make the division happens first, | |
4999 | on positive values, so we know it will round towards | |
5000 | zero. */ | |
bb63c5c9 | 5001 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
5002 | result = *var; |
5003 | r->nbytes_specified = nbytes; | |
5004 | } | |
5005 | else | |
5006 | { | |
5007 | /* Leave it alone. */ | |
5008 | result = *var; | |
5009 | r->nbytes_specified = nbytes; | |
5010 | } | |
5011 | } | |
5012 | ||
5013 | return result; | |
5014 | } | |
5015 | ||
5016 | ||
b86af064 GM |
5017 | #endif /* USE_MMAP_FOR_BUFFERS */ |
5018 | ||
5019 | ||
5020 | \f | |
5021 | /*********************************************************************** | |
5022 | Buffer-text Allocation | |
5023 | ***********************************************************************/ | |
5024 | ||
b86af064 GM |
5025 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
5026 | ||
5027 | static void | |
fd05c7e9 | 5028 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 5029 | { |
261cb4bb | 5030 | void *p; |
177c0ea7 | 5031 | |
b86af064 GM |
5032 | BLOCK_INPUT; |
5033 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5034 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5035 | #elif defined REL_ALLOC |
261cb4bb | 5036 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5037 | #else |
815add84 | 5038 | p = xmalloc (nbytes); |
b86af064 | 5039 | #endif |
177c0ea7 | 5040 | |
b86af064 GM |
5041 | if (p == NULL) |
5042 | { | |
5043 | UNBLOCK_INPUT; | |
531b0165 | 5044 | memory_full (nbytes); |
b86af064 GM |
5045 | } |
5046 | ||
5047 | b->text->beg = (unsigned char *) p; | |
5048 | UNBLOCK_INPUT; | |
5049 | } | |
5050 | ||
5051 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5052 | shrink it. */ | |
5053 | ||
5054 | void | |
d311d28c | 5055 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 5056 | { |
261cb4bb | 5057 | void *p; |
fd05c7e9 PE |
5058 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
5059 | + delta); | |
b86af064 GM |
5060 | BLOCK_INPUT; |
5061 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5062 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 5063 | #elif defined REL_ALLOC |
261cb4bb | 5064 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
5065 | #else |
5066 | p = xrealloc (b->text->beg, nbytes); | |
5067 | #endif | |
177c0ea7 | 5068 | |
b86af064 GM |
5069 | if (p == NULL) |
5070 | { | |
5071 | UNBLOCK_INPUT; | |
531b0165 | 5072 | memory_full (nbytes); |
b86af064 GM |
5073 | } |
5074 | ||
5075 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5076 | UNBLOCK_INPUT; | |
5077 | } | |
5078 | ||
5079 | ||
5080 | /* Free buffer B's text buffer. */ | |
5081 | ||
5082 | static void | |
d3da34e0 | 5083 | free_buffer_text (struct buffer *b) |
b86af064 GM |
5084 | { |
5085 | BLOCK_INPUT; | |
5086 | ||
5087 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 5088 | mmap_free ((void **) &b->text->beg); |
b86af064 | 5089 | #elif defined REL_ALLOC |
261cb4bb | 5090 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
5091 | #else |
5092 | xfree (b->text->beg); | |
5093 | #endif | |
177c0ea7 | 5094 | |
b86af064 GM |
5095 | BUF_BEG_ADDR (b) = NULL; |
5096 | UNBLOCK_INPUT; | |
5097 | } | |
5098 | ||
5099 | ||
5100 | \f | |
5101 | /*********************************************************************** | |
5102 | Initialization | |
5103 | ***********************************************************************/ | |
5104 | ||
dfcf069d | 5105 | void |
d3da34e0 | 5106 | init_buffer_once (void) |
1ab256cb | 5107 | { |
7c02e886 | 5108 | int idx; |
3884d954 DA |
5109 | /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make |
5110 | sure that this is still correct. Otherwise, mark_vectorlike may not | |
5111 | trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */ | |
38182d90 | 5112 | const int pvecsize |
663e2b3f | 5113 | = (offsetof (struct buffer, own_text) - header_size) / word_size; |
7c02e886 | 5114 | |
72af86bd | 5115 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 5116 | |
1ab256cb RM |
5117 | /* Make sure all markable slots in buffer_defaults |
5118 | are initialized reasonably, so mark_buffer won't choke. */ | |
5119 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 5120 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 5121 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 5122 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 5123 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5124 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5125 | /* Prevent GC from getting confused. */ |
5126 | buffer_defaults.text = &buffer_defaults.own_text; | |
5127 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
5128 | /* No one will share the text with these buffers, but let's play it safe. */ |
5129 | buffer_defaults.indirections = 0; | |
5130 | buffer_local_symbols.indirections = 0; | |
0c94c8d6 PE |
5131 | set_buffer_intervals (&buffer_defaults, NULL); |
5132 | set_buffer_intervals (&buffer_local_symbols, NULL); | |
c752cfa9 DA |
5133 | /* This is not strictly necessary, but let's make them initialized. */ |
5134 | bset_name (&buffer_defaults, build_pure_c_string (" *buffer-defaults*")); | |
5135 | bset_name (&buffer_local_symbols, build_pure_c_string (" *buffer-local-symbols*")); | |
3884d954 | 5136 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, pvecsize); |
3884d954 | 5137 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, pvecsize); |
1ab256cb RM |
5138 | |
5139 | /* Set up the default values of various buffer slots. */ | |
5140 | /* Must do these before making the first buffer! */ | |
5141 | ||
f532dca0 | 5142 | /* real setup is done in bindings.el */ |
39eb03f1 PE |
5143 | bset_mode_line_format (&buffer_defaults, build_pure_c_string ("%-")); |
5144 | bset_header_line_format (&buffer_defaults, Qnil); | |
5145 | bset_abbrev_mode (&buffer_defaults, Qnil); | |
5146 | bset_overwrite_mode (&buffer_defaults, Qnil); | |
5147 | bset_case_fold_search (&buffer_defaults, Qt); | |
5148 | bset_auto_fill_function (&buffer_defaults, Qnil); | |
5149 | bset_selective_display (&buffer_defaults, Qnil); | |
5150 | bset_selective_display_ellipses (&buffer_defaults, Qt); | |
5151 | bset_abbrev_table (&buffer_defaults, Qnil); | |
5152 | bset_display_table (&buffer_defaults, Qnil); | |
5153 | bset_undo_list (&buffer_defaults, Qnil); | |
5154 | bset_mark_active (&buffer_defaults, Qnil); | |
5155 | bset_file_format (&buffer_defaults, Qnil); | |
5156 | bset_auto_save_file_format (&buffer_defaults, Qt); | |
0c94c8d6 PE |
5157 | set_buffer_overlays_before (&buffer_defaults, NULL); |
5158 | set_buffer_overlays_after (&buffer_defaults, NULL); | |
c2d5b10f | 5159 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5160 | |
4b4deea2 | 5161 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
39eb03f1 PE |
5162 | bset_truncate_lines (&buffer_defaults, Qnil); |
5163 | bset_word_wrap (&buffer_defaults, Qnil); | |
5164 | bset_ctl_arrow (&buffer_defaults, Qt); | |
5165 | bset_bidi_display_reordering (&buffer_defaults, Qt); | |
5166 | bset_bidi_paragraph_direction (&buffer_defaults, Qnil); | |
5167 | bset_cursor_type (&buffer_defaults, Qt); | |
5168 | bset_extra_line_spacing (&buffer_defaults, Qnil); | |
5169 | bset_cursor_in_non_selected_windows (&buffer_defaults, Qt); | |
5170 | ||
5171 | bset_enable_multibyte_characters (&buffer_defaults, Qt); | |
5172 | bset_buffer_file_coding_system (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5173 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
5174 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
39eb03f1 PE |
5175 | bset_cache_long_line_scans (&buffer_defaults, Qnil); |
5176 | bset_file_truename (&buffer_defaults, Qnil); | |
4b4deea2 TT |
5177 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
5178 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5179 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
39eb03f1 PE |
5180 | bset_left_fringe_width (&buffer_defaults, Qnil); |
5181 | bset_right_fringe_width (&buffer_defaults, Qnil); | |
5182 | bset_fringes_outside_margins (&buffer_defaults, Qnil); | |
5183 | bset_scroll_bar_width (&buffer_defaults, Qnil); | |
5184 | bset_vertical_scroll_bar_type (&buffer_defaults, Qt); | |
5185 | bset_indicate_empty_lines (&buffer_defaults, Qnil); | |
5186 | bset_indicate_buffer_boundaries (&buffer_defaults, Qnil); | |
5187 | bset_fringe_indicator_alist (&buffer_defaults, Qnil); | |
5188 | bset_fringe_cursor_alist (&buffer_defaults, Qnil); | |
5189 | bset_scroll_up_aggressively (&buffer_defaults, Qnil); | |
5190 | bset_scroll_down_aggressively (&buffer_defaults, Qnil); | |
5191 | bset_display_time (&buffer_defaults, Qnil); | |
1ab256cb RM |
5192 | |
5193 | /* Assign the local-flags to the slots that have default values. | |
5194 | The local flag is a bit that is used in the buffer | |
5195 | to say that it has its own local value for the slot. | |
5196 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5197 | ||
5198 | /* Nothing can work if this isn't true */ | |
663e2b3f | 5199 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
5200 | |
5201 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5202 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
39eb03f1 PE |
5203 | bset_filename (&buffer_local_flags, make_number (-1)); |
5204 | bset_directory (&buffer_local_flags, make_number (-1)); | |
5205 | bset_backed_up (&buffer_local_flags, make_number (-1)); | |
5206 | bset_save_length (&buffer_local_flags, make_number (-1)); | |
5207 | bset_auto_save_file_name (&buffer_local_flags, make_number (-1)); | |
5208 | bset_read_only (&buffer_local_flags, make_number (-1)); | |
5209 | bset_major_mode (&buffer_local_flags, make_number (-1)); | |
5210 | bset_mode_name (&buffer_local_flags, make_number (-1)); | |
5211 | bset_undo_list (&buffer_local_flags, make_number (-1)); | |
5212 | bset_mark_active (&buffer_local_flags, make_number (-1)); | |
5213 | bset_point_before_scroll (&buffer_local_flags, make_number (-1)); | |
5214 | bset_file_truename (&buffer_local_flags, make_number (-1)); | |
5215 | bset_invisibility_spec (&buffer_local_flags, make_number (-1)); | |
5216 | bset_file_format (&buffer_local_flags, make_number (-1)); | |
5217 | bset_auto_save_file_format (&buffer_local_flags, make_number (-1)); | |
5218 | bset_display_count (&buffer_local_flags, make_number (-1)); | |
5219 | bset_display_time (&buffer_local_flags, make_number (-1)); | |
5220 | bset_enable_multibyte_characters (&buffer_local_flags, make_number (-1)); | |
8d7a4592 | 5221 | |
7c02e886 | 5222 | idx = 1; |
4b4deea2 TT |
5223 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5224 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5225 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5226 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5227 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5228 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5229 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5230 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5231 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5232 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5233 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5234 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5235 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5236 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5237 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5238 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5239 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5240 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5241 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5242 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5243 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5244 | /* Make this one a permanent local. */ |
7c02e886 | 5245 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5246 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5247 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5248 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5249 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5250 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5251 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5252 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5253 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5254 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5255 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5256 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5257 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5258 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5259 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5260 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5261 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5262 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5263 | |
5264 | /* Need more room? */ | |
7313acd0 | 5265 | if (idx >= MAX_PER_BUFFER_VARS) |
1088b922 | 5266 | emacs_abort (); |
7313acd0 | 5267 | last_per_buffer_idx = idx; |
177c0ea7 | 5268 | |
1ab256cb RM |
5269 | Vbuffer_alist = Qnil; |
5270 | current_buffer = 0; | |
5271 | all_buffers = 0; | |
5272 | ||
2a0213a6 | 5273 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5274 | |
d67b4f80 | 5275 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
39eb03f1 | 5276 | bset_major_mode (&buffer_defaults, Qfundamental_mode); |
1ab256cb | 5277 | |
d67b4f80 | 5278 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5279 | |
d67b4f80 | 5280 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5281 | |
d67b4f80 | 5282 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5283 | |
d67b4f80 | 5284 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5285 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5286 | |
1ab256cb | 5287 | /* super-magic invisible buffer */ |
2a0213a6 | 5288 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5289 | Vbuffer_alist = Qnil; |
5290 | ||
2a0213a6 | 5291 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5292 | |
5293 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5294 | } |
5295 | ||
dfcf069d | 5296 | void |
d3da34e0 | 5297 | init_buffer (void) |
1ab256cb | 5298 | { |
2381d133 | 5299 | char *pwd; |
136351b7 | 5300 | Lisp_Object temp; |
965d34eb | 5301 | ptrdiff_t len; |
1ab256cb | 5302 | |
b86af064 | 5303 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5304 | { |
5305 | /* When using the ralloc implementation based on mmap(2), buffer | |
5306 | text pointers will have been set to null in the dumped Emacs. | |
5307 | Map new memory. */ | |
5308 | struct buffer *b; | |
177c0ea7 | 5309 | |
52b852c7 | 5310 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5311 | if (b->text->beg == NULL) |
b86af064 | 5312 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5313 | } |
b86af064 | 5314 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5315 | |
1ab256cb | 5316 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5317 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5318 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5319 | |
01537133 | 5320 | pwd = get_current_dir_name (); |
a17b5ed1 | 5321 | |
156bdb41 | 5322 | if (!pwd) |
a17b5ed1 | 5323 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5324 | |
1ab256cb RM |
5325 | /* Maybe this should really use some standard subroutine |
5326 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5327 | len = strlen (pwd); |
5328 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5329 | { |
156bdb41 | 5330 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5331 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5332 | if (!pwd) |
5333 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5334 | pwd[len] = DIRECTORY_SEP; |
5335 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5336 | len++; |
f7975d07 | 5337 | } |
0995fa35 | 5338 | |
39eb03f1 | 5339 | bset_directory (current_buffer, make_unibyte_string (pwd, len)); |
4b4deea2 | 5340 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5341 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5342 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5343 | that ENCODE_FILE correctly gets the original bytes. */ |
39eb03f1 PE |
5344 | bset_directory |
5345 | (current_buffer, string_to_multibyte (BVAR (current_buffer, directory))); | |
136351b7 | 5346 | |
0995fa35 RS |
5347 | /* Add /: to the front of the name |
5348 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5349 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5350 | if (! NILP (temp) |
5351 | /* If the default dir is just /, TEMP is non-nil | |
5352 | because of the ange-ftp completion handler. | |
5353 | However, it is not necessary to turn / into /:/. | |
5354 | So avoid doing that. */ | |
4b4deea2 | 5355 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
39eb03f1 PE |
5356 | bset_directory |
5357 | (current_buffer, | |
5358 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5359 | |
136351b7 | 5360 | temp = get_minibuffer (0); |
39eb03f1 | 5361 | bset_directory (XBUFFER (temp), BVAR (current_buffer, directory)); |
01537133 EZ |
5362 | |
5363 | free (pwd); | |
1ab256cb RM |
5364 | } |
5365 | ||
d6aa1876 SM |
5366 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5367 | Object stored in the current buffer. address is the address of the slot | |
5368 | in the buffer that is current now. */ | |
5369 | ||
5370 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5371 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5372 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5373 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5374 | VNAME is the name of the buffer slot. |
5375 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5376 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5377 | do { \ | |
5378 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5379 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5380 | } while (0) |
d6aa1876 SM |
5381 | |
5382 | static void | |
8ea90aa3 | 5383 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5384 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5385 | { |
ce5b453a | 5386 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5387 | int offset; |
5388 | ||
ce5b453a | 5389 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5390 | offset = (char *)address - (char *)current_buffer; |
5391 | ||
ce5b453a SM |
5392 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5393 | bo_fwd->offset = offset; | |
5394 | bo_fwd->slottype = type; | |
b9598260 | 5395 | sym->declared_special = 1; |
ce5b453a SM |
5396 | sym->redirect = SYMBOL_FORWARDED; |
5397 | { | |
5398 | /* I tried to do the job without a cast, but it seems impossible. | |
5399 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5400 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5401 | } | |
5402 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5403 | |
5404 | if (PER_BUFFER_IDX (offset) == 0) | |
5405 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5406 | slot of buffer_local_flags */ | |
1088b922 | 5407 | emacs_abort (); |
d6aa1876 SM |
5408 | } |
5409 | ||
5410 | ||
1ab256cb | 5411 | /* initialize the buffer routines */ |
dfcf069d | 5412 | void |
d3da34e0 | 5413 | syms_of_buffer (void) |
1ab256cb | 5414 | { |
9115729e KH |
5415 | staticpro (&last_overlay_modification_hooks); |
5416 | last_overlay_modification_hooks | |
5417 | = Fmake_vector (make_number (10), Qnil); | |
5418 | ||
1ab256cb RM |
5419 | staticpro (&Qfundamental_mode); |
5420 | staticpro (&Qmode_class); | |
5421 | staticpro (&QSFundamental); | |
5422 | staticpro (&Vbuffer_alist); | |
5423 | staticpro (&Qprotected_field); | |
5424 | staticpro (&Qpermanent_local); | |
5425 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5426 | |
5427 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5428 | DEFSYM (Qoverlayp, "overlayp"); | |
5429 | DEFSYM (Qevaporate, "evaporate"); | |
5430 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5431 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5432 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5433 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5434 | DEFSYM (Qpriority, "priority"); | |
5435 | DEFSYM (Qbefore_string, "before-string"); | |
5436 | DEFSYM (Qafter_string, "after-string"); | |
5437 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5438 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5439 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5440 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5441 | ||
1ab256cb | 5442 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5443 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5444 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5445 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5446 | |
422745d0 TT |
5447 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5448 | mode_line_format, | |
5449 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5450 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5451 | |
422745d0 TT |
5452 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5453 | header_line_format, | |
5454 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5455 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5456 | |
422745d0 TT |
5457 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5458 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5459 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5460 | |
422745d0 TT |
5461 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5462 | extra_line_spacing, | |
5463 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5464 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5465 | |
422745d0 TT |
5466 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5467 | cursor_in_non_selected_windows, | |
5468 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5469 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5470 | ||
422745d0 TT |
5471 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5472 | abbrev_mode, | |
5473 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5474 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5475 | |
422745d0 TT |
5476 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5477 | ctl_arrow, | |
5478 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5479 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5480 | |
422745d0 TT |
5481 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5482 | enable_multibyte_characters, | |
fb7ada5f | 5483 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5484 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5485 | |
422745d0 TT |
5486 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5487 | buffer_file_coding_system, | |
5488 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5489 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5490 | |
422745d0 TT |
5491 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5492 | truncate_lines, | |
5493 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5494 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5495 | |
422745d0 TT |
5496 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5497 | fill_column, | |
5498 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5499 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5500 | |
422745d0 TT |
5501 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5502 | left_margin, | |
5503 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5504 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5505 | |
422745d0 TT |
5506 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5507 | tab_width, | |
5508 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5509 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5510 | |
422745d0 TT |
5511 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5512 | case_fold_search, | |
5513 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5514 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5515 | |
422745d0 TT |
5516 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5517 | left_margin_cols, | |
5518 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5519 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5520 | |
422745d0 TT |
5521 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5522 | right_margin_cols, | |
5523 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5524 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5525 | |
422745d0 TT |
5526 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5527 | left_fringe_width, | |
5528 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5529 | This is the same as (default-value 'left-fringe-width). */); |
5530 | ||
422745d0 TT |
5531 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5532 | right_fringe_width, | |
5533 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5534 | This is the same as (default-value 'right-fringe-width). */); |
5535 | ||
422745d0 TT |
5536 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5537 | fringes_outside_margins, | |
5538 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5539 | This is the same as (default-value 'fringes-outside-margins). */); |
5540 | ||
422745d0 TT |
5541 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5542 | scroll_bar_width, | |
5543 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5544 | This is the same as (default-value 'scroll-bar-width). */); |
5545 | ||
422745d0 TT |
5546 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5547 | vertical_scroll_bar_type, | |
5548 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5549 | This is the same as (default-value 'vertical-scroll-bar). */); |
5550 | ||
422745d0 TT |
5551 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5552 | indicate_empty_lines, | |
5553 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5554 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5555 | |
422745d0 TT |
5556 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5557 | indicate_buffer_boundaries, | |
5558 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5559 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5560 | ||
422745d0 TT |
5561 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5562 | fringe_indicator_alist, | |
5563 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5564 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5565 | ||
422745d0 TT |
5566 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5567 | fringe_cursor_alist, | |
5568 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5569 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5570 | ||
422745d0 TT |
5571 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5572 | scroll_up_aggressively, | |
5573 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5574 | This value applies in buffers that don't have their own local values. |
fc961256 | 5575 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5576 | |
422745d0 TT |
5577 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5578 | scroll_down_aggressively, | |
5579 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5580 | This value applies in buffers that don't have their own local values. |
fc961256 | 5581 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5582 | |
045dee35 | 5583 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5584 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5585 | Qnil, |
7614d762 RS |
5586 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5587 | The header line appears, optionally, at the top of a window; | |
5588 | the mode line appears at the bottom. */); | |
177c0ea7 | 5589 | |
4b4deea2 | 5590 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5591 | Qnil, |
5592 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5593 | |
5594 | The value may be nil, a string, a symbol or a list. | |
5595 | ||
018ba359 | 5596 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5597 | |
5598 | For any symbol other than t or nil, the symbol's value is processed as | |
5599 | a mode line construct. As a special exception, if that value is a | |
5600 | string, the string is processed verbatim, without handling any | |
5601 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5602 | `risky-local-variable' property, all properties in any strings, as | |
5603 | well as all :eval and :propertize forms in the value, are ignored. | |
5604 | ||
5605 | A list whose car is a string or list is processed by processing each | |
5606 | of the list elements recursively, as separate mode line constructs, | |
5607 | and concatenating the results. | |
5608 | ||
5609 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5610 | using the result as a mode line construct. Be careful--FORM should | |
5611 | not load any files, because that can cause an infinite recursion. | |
5612 | ||
5613 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5614 | processing ELT as the mode line construct, and adding the text | |
5615 | properties PROPS to the result. | |
5616 | ||
5617 | A list whose car is a symbol is processed by examining the symbol's | |
5618 | value, and, if that value is non-nil, processing the cadr of the list | |
5619 | recursively; and if that value is nil, processing the caddr of the | |
5620 | list recursively. | |
5621 | ||
5622 | A list whose car is an integer is processed by processing the cadr of | |
5623 | the list, and padding (if the number is positive) or truncating (if | |
5624 | negative) to the width specified by that number. | |
5625 | ||
018ba359 | 5626 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5627 | %b -- print buffer name. %f -- print visited file name. |
5628 | %F -- print frame name. | |
5629 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5630 | %& is like %*, but ignore read-only-ness. | |
5631 | % means buffer is read-only and * means it is modified. | |
5632 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5633 | %s -- print process status. %l -- print the current line number. | |
5634 | %c -- print the current column number (this makes editing slower). | |
5635 | To make the column number update correctly in all cases, | |
5636 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5637 | %i -- print the size of the buffer. |
5638 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5639 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5640 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5641 | or print Bottom or All. | |
018ba359 | 5642 | %n -- print Narrow if appropriate. |
dafbe726 | 5643 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5644 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5645 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5646 | %e -- print error message about full memory. |
f7165034 NR |
5647 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5648 | remote machine. | |
018ba359 PJ |
5649 | %[ -- print one [ for each recursive editing level. %] similar. |
5650 | %% -- print %. %- -- print infinitely many dashes. | |
5651 | Decimal digits after the % specify field width to which to pad. */); | |
5652 | ||
422745d0 | 5653 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5654 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5655 | |
4b4deea2 | 5656 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5657 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5658 | doc: /* Symbol for current buffer's major mode. |
5659 | The default value (normally `fundamental-mode') affects new buffers. | |
5660 | A value of nil means to use the current buffer's major mode, provided | |
5661 | it is not marked as "special". | |
5662 | ||
5663 | When a mode is used by default, `find-file' switches to it before it | |
5664 | reads the contents into the buffer and before it finishes setting up | |
5665 | the buffer. Thus, the mode and its hooks should not expect certain | |
5666 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5667 | to be set up. */); | |
1ab256cb | 5668 | |
4b4deea2 | 5669 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5670 | Qnil, |
64a7c220 | 5671 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5672 | Usually a string, but can use any of the constructs for `mode-line-format', |
5673 | which see. | |
5674 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5675 | |
4b4deea2 | 5676 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5677 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5678 | ||
4b4deea2 | 5679 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5680 | doc: /* Non-nil if Abbrev mode is enabled. |
5681 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5682 | |
4b4deea2 | 5683 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5684 | Qnil, |
fb7ada5f | 5685 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5686 | |
4b4deea2 | 5687 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
d5040d2d | 5688 | make_number (Lisp_Int0), |
fb7ada5f | 5689 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5690 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5691 | |
4b4deea2 | 5692 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
d5040d2d | 5693 | make_number (Lisp_Int0), |
fb7ada5f | 5694 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5695 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5696 | |
4b4deea2 | 5697 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
d5040d2d | 5698 | make_number (Lisp_Int0), |
fb7ada5f | 5699 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5700 | This should be an integer greater than zero. */); |
1ab256cb | 5701 | |
4b4deea2 | 5702 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5703 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5704 | A value of nil means use backslash and octal digits. |
5705 | This variable does not apply to characters whose display is specified | |
5706 | in the current display table (if there is one). */); | |
1ab256cb | 5707 | |
3b06f880 | 5708 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5709 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5710 | Qnil, |
efc7e75f | 5711 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5712 | Otherwise they are regarded as unibyte. This affects the display, |
5713 | file I/O and the behavior of various editing commands. | |
5714 | ||
5715 | This variable is buffer-local but you cannot set it directly; | |
5716 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5717 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5718 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5719 | |
c71b5d9b | 5720 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5721 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5722 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5723 | This variable applies to saving the buffer, and also to `write-region' |
5724 | and other functions that use `write-region'. | |
5725 | It does not apply to sending output to subprocesses, however. | |
5726 | ||
5727 | If this is nil, the buffer is saved without any code conversion | |
5728 | unless some coding system is specified in `file-coding-system-alist' | |
5729 | for the buffer file. | |
5730 | ||
31a6cb06 EZ |
5731 | If the text to be saved cannot be encoded as specified by this variable, |
5732 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5733 | ||
018ba359 PJ |
5734 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5735 | ||
5736 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5737 | |
f44e260c | 5738 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5739 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5740 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5741 | |
6c0cf218 | 5742 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5743 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5744 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5745 | |
b44d9321 EZ |
5746 | If this is nil (the default), the direction of each paragraph is |
5747 | determined by the first strong directional character of its text. | |
5748 | The values of `right-to-left' and `left-to-right' override that. | |
5749 | Any other value is treated as nil. | |
b4bf28b7 | 5750 | |
b44d9321 EZ |
5751 | This variable has no effect unless the buffer's value of |
5752 | \`bidi-display-reordering' is non-nil. */); | |
5753 | ||
4b4deea2 | 5754 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5755 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5756 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5757 | |
5758 | Note that this is overridden by the variable | |
5759 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5760 | and this buffer is not full-frame width. |
5761 | ||
5762 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5763 | |
4b4deea2 | 5764 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5765 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5766 | When word-wrapping is on, continuation lines are wrapped at the space |
5767 | or tab character nearest to the right window edge. | |
5768 | If nil, continuation lines are wrapped at the right screen edge. | |
5769 | ||
5770 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5771 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5772 | word-wrapping, you might want to reduce the value of | |
5773 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5774 | in narrower windows. |
5775 | ||
5776 | Instead of setting this variable directly, most users should use | |
5777 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5778 | to t, and additionally redefines simple editing commands to act on | |
5779 | visual lines rather than logical lines. See the documentation of | |
5780 | `visual-line-mode'. */); | |
0858cd02 | 5781 | |
4b4deea2 | 5782 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5783 | make_number (Lisp_String), |
efc7e75f | 5784 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5785 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5786 | |
4b4deea2 | 5787 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5788 | Qnil, |
efc7e75f | 5789 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5790 | It is called after self-inserting any character specified in |
5791 | the `auto-fill-chars' table. | |
5792 | NOTE: This variable is not a hook; | |
5793 | its value may not be a list of functions. */); | |
1ab256cb | 5794 | |
4b4deea2 | 5795 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5796 | make_number (Lisp_String), |
efc7e75f | 5797 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5798 | |
4b4deea2 | 5799 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5800 | make_number (Lisp_String), |
efc7e75f | 5801 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5802 | The truename of a file is calculated by `file-truename' |
5803 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5804 | |
1ab256cb | 5805 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5806 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5807 | make_number (Lisp_String), |
7614d762 RS |
5808 | doc: /* Name of file for auto-saving current buffer. |
5809 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5810 | |
4b4deea2 | 5811 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5812 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5813 | |
4b4deea2 | 5814 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5815 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5816 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5817 | |
4b4deea2 | 5818 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
d5040d2d | 5819 | make_number (Lisp_Int0), |
efc7e75f | 5820 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5821 | 0 initially. |
5822 | -1 means auto-saving turned off until next real save. | |
5823 | ||
5824 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5825 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5826 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5827 | |
4b4deea2 | 5828 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5829 | Qnil, |
7614d762 | 5830 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5831 | An integer N as value means display only lines |
5832 | that start with less than N columns of space. | |
7614d762 RS |
5833 | A value of t means that the character ^M makes itself and |
5834 | all the rest of the line invisible; also, when saving the buffer | |
5835 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5836 | |
1ab256cb | 5837 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5838 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5839 | Qnil, |
3f676284 | 5840 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5841 | |
4b4deea2 | 5842 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5843 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5844 | The value should be one of `overwrite-mode-textual', |
5845 | `overwrite-mode-binary', or nil. | |
5846 | If it is `overwrite-mode-textual', self-insertion still | |
5847 | inserts at the end of a line, and inserts when point is before a tab, | |
5848 | until the tab is filled in. | |
5849 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5850 | ||
4b4deea2 | 5851 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5852 | Qnil, |
efc7e75f | 5853 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5854 | |
5855 | If this variable is nil, the value of `standard-display-table' is used. | |
5856 | Each window can have its own, overriding display table, see | |
5857 | `set-window-display-table' and `window-display-table'. | |
5858 | ||
5859 | The display table is a char-table created with `make-display-table'. | |
5860 | A char-table is an array indexed by character codes. Normal array | |
5861 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5862 | ||
5863 | Each of the char-table elements control how to display the corresponding | |
5864 | text character: the element at index C in the table says how to display | |
5865 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5866 | characters or nil. The value nil means display the character in the |
5867 | default fashion; otherwise, the characters from the vector are delivered | |
5868 | to the screen instead of the original character. | |
018ba359 | 5869 | |
5fd11dc8 | 5870 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5871 | to display a capital Y instead of each X character. |
018ba359 PJ |
5872 | |
5873 | In addition, a char-table has six extra slots to control the display of: | |
5874 | ||
5875 | the end of a truncated screen line (extra-slot 0, a single character); | |
5876 | the end of a continued line (extra-slot 1, a single character); | |
5877 | the escape character used to display character codes in octal | |
5878 | (extra-slot 2, a single character); | |
5879 | the character used as an arrow for control characters (extra-slot 3, | |
5880 | a single character); | |
5881 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5882 | a vector of characters); | |
5883 | the character used to draw the border between side-by-side windows | |
5884 | (extra-slot 5, a single character). | |
5885 | ||
5886 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5887 | |
4b4deea2 | 5888 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5889 | Qnil, |
fb7ada5f | 5890 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5891 | A value of nil means no marginal area. */); |
177c0ea7 | 5892 | |
4b4deea2 | 5893 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5894 | Qnil, |
fb7ada5f | 5895 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5896 | A value of nil means no marginal area. */); |
177c0ea7 | 5897 | |
4b4deea2 | 5898 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5899 | Qnil, |
fb7ada5f | 5900 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5901 | A value of 0 means no left fringe is shown in this buffer's window. |
5902 | A value of nil means to use the left fringe width from the window's frame. */); | |
5903 | ||
4b4deea2 | 5904 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5905 | Qnil, |
fb7ada5f | 5906 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5907 | A value of 0 means no right fringe is shown in this buffer's window. |
5908 | A value of nil means to use the right fringe width from the window's frame. */); | |
5909 | ||
4b4deea2 | 5910 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5911 | Qnil, |
fb7ada5f | 5912 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5913 | A value of nil means to display fringes between margins and buffer text. */); |
5914 | ||
4b4deea2 | 5915 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5916 | Qnil, |
fb7ada5f | 5917 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5918 | A value of nil means to use the scroll bar width from the window's frame. */); |
5919 | ||
4b4deea2 | 5920 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5921 | Qnil, |
fb7ada5f | 5922 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5923 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5924 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5925 | |
fc2c8887 RS |
5926 | A value of `left' or `right' means put the vertical scroll bar at that side |
5927 | of the window; a value of nil means don't show any vertical scroll bars. | |
5928 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5929 | |
0552666b | 5930 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5931 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5932 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5933 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5934 | window-systems. */); | |
177c0ea7 | 5935 | |
6b61353c | 5936 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5937 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5938 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5939 | If non-nil, the first and last line of the buffer are marked in the fringe |
5940 | of a window on window-systems with angle bitmaps, or if the window can be | |
5941 | scrolled, the top and bottom line of the window are marked with up and down | |
5942 | arrow bitmaps. | |
b2229037 KS |
5943 | |
5944 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5945 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5946 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5947 | the left fringe but no arrows. |
b2229037 | 5948 | |
79e3497d RS |
5949 | You can exercise more precise control by using an alist as the |
5950 | value. Each alist element (INDICATOR . POSITION) specifies | |
5951 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5952 | `bottom', `up', `down', or t, which specifies the default position, |
5953 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5954 | this indicator. | |
5955 | ||
5956 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5957 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5958 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5959 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5960 | |
c6a46372 | 5961 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5962 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5963 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5964 | The value is an alist where each element (INDICATOR . BITMAPS) |
5965 | specifies the fringe bitmaps used to display a specific logical | |
5966 | fringe indicator. | |
5967 | ||
5968 | INDICATOR specifies the logical indicator type which is one of the | |
5969 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5970 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5971 | |
14fb5704 | 5972 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5973 | the actual bitmap shown in the left or right fringe for the logical |
5974 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5975 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5976 | are used only for the `bottom' and `top-bottom' indicators when the |
5977 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5978 | symbol which is used in both left and right fringes. */); |
5979 | ||
5980 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5981 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5982 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5983 | The value is an alist where each element (CURSOR . BITMAP) |
5984 | specifies the fringe bitmaps used to display a specific logical | |
5985 | cursor type in the fringe. | |
5986 | ||
5987 | CURSOR specifies the logical cursor type which is one of the following | |
5988 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5989 | one is used to show a hollow cursor on narrow lines display lines | |
5990 | where the normal hollow cursor will not fit. | |
5991 | ||
5992 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5993 | cursor type. */); | |
5994 | ||
0552666b | 5995 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5996 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5997 | doc: /* How far to scroll windows upward. |
5998 | If you move point off the bottom, 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 bottom of the window. | |
d765e3a3 JB |
6002 | When the value is 0.0, point goes at the bottom line, which in the |
6003 | simple case that you moved off with C-f means scrolling just one line. | |
6004 | 1.0 means point goes at the top, 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 | |
0552666b | 6008 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 6009 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
6010 | doc: /* How far to scroll windows downward. |
6011 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 6012 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
6013 | means scroll to center point. A fraction means scroll to put point |
6014 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
6015 | When the value is 0.0, point goes at the top line, which in the |
6016 | simple case that you moved off with C-b means scrolling just one line. | |
6017 | 1.0 means point goes at the bottom, so that in that simple case, the | |
6018 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 6019 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 6020 | |
1ab256cb RM |
6021 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
6022 | "Don't ask."); | |
6023 | */ | |
1ab256cb | 6024 | |
29208e82 | 6025 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 6026 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
6027 | Two arguments are passed to each function: the positions of |
6028 | the beginning and end of the range of old text to be changed. | |
6029 | \(For an insertion, the beginning and end are at the same place.) | |
6030 | No information is given about the length of the text after the change. | |
6031 | ||
6032 | Buffer changes made while executing the `before-change-functions' | |
6033 | don't call any before-change or after-change functions. | |
7b2bf907 | 6034 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6035 | |
6036 | If an unhandled error happens in running these functions, | |
6037 | the variable's value remains nil. That prevents the error | |
6038 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6039 | Vbefore_change_functions = Qnil; |
6040 | ||
29208e82 | 6041 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 6042 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6043 | Three arguments are passed to each function: the positions of |
6044 | the beginning and end of the range of changed text, | |
6045 | and the length in bytes of the pre-change text replaced by that range. | |
6046 | \(For an insertion, the pre-change length is zero; | |
6047 | for a deletion, that length is the number of bytes deleted, | |
6048 | and the post-change beginning and end are at the same place.) | |
6049 | ||
6050 | Buffer changes made while executing the `after-change-functions' | |
6051 | don't call any before-change or after-change functions. | |
7b2bf907 | 6052 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
6053 | |
6054 | If an unhandled error happens in running these functions, | |
6055 | the variable's value remains nil. That prevents the error | |
6056 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6057 | Vafter_change_functions = Qnil; |
6058 | ||
29208e82 | 6059 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 6060 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6061 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6062 | Vfirst_change_hook = Qnil; |
1ab256cb | 6063 | |
4b4deea2 | 6064 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 6065 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
6066 | Recent changes come first; older changes follow newer. |
6067 | ||
6068 | An entry (BEG . END) represents an insertion which begins at | |
6069 | position BEG and ends at position END. | |
6070 | ||
6071 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6072 | from (abs POSITION). If POSITION is positive, point was at the front | |
6073 | of the text being deleted; if negative, point was at the end. | |
6074 | ||
d35af63c PE |
6075 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
6076 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
6077 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
6078 | modification time of the most recent save is different, this entry is |
6079 | obsolete. | |
6080 | ||
6081 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6082 | was modified between BEG and END. PROPERTY is the property name, | |
6083 | and VALUE is the old value. | |
6084 | ||
7405f386 KS |
6085 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6086 | \(apply FUN-NAME ARGS). | |
6087 | ||
6088 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6089 | in the active region. BEG and END is the range affected by this entry | |
6090 | and DELTA is the number of bytes added or deleted in that range by | |
6091 | this change. | |
c6c7dc03 | 6092 | |
018ba359 PJ |
6093 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6094 | was adjusted in position by the offset DISTANCE (an integer). | |
6095 | ||
6096 | An entry of the form POSITION indicates that point was at the buffer | |
6097 | location given by the integer. Undoing an entry of this form places | |
6098 | point at POSITION. | |
6099 | ||
b4c4f2f4 JB |
6100 | Entries with value `nil' mark undo boundaries. The undo command treats |
6101 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6102 | |
6103 | If the value of the variable is t, undo information is not recorded. */); | |
6104 | ||
4b4deea2 | 6105 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 6106 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 6107 | |
4b4deea2 | 6108 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 6109 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
6110 | |
6111 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6112 | newlines. Columnar operations (like `move-to-column' and |
6113 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6114 | widths as they go. This works well for ordinary text, but if the |
6115 | buffer's lines are very long (say, more than 500 characters), these | |
6116 | motion functions will take longer to execute. Emacs may also take | |
6117 | longer to update the display. | |
6118 | ||
5629f29b | 6119 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6120 | results of their scans, and consult the cache to avoid rescanning |
6121 | regions of the buffer until the text is modified. The caches are most | |
6122 | beneficial when they prevent the most searching---that is, when the | |
6123 | buffer contains long lines and large regions of characters with the | |
6124 | same, fixed screen width. | |
6125 | ||
5629f29b | 6126 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6127 | become slightly slower (because of the overhead of consulting the |
6128 | cache), and the caches will use memory roughly proportional to the | |
6129 | number of newlines and characters whose screen width varies. | |
6130 | ||
6131 | The caches require no explicit maintenance; their accuracy is | |
6132 | maintained internally by the Emacs primitives. Enabling or disabling | |
6133 | the cache should not affect the behavior of any of the motion | |
6134 | functions; it should only affect their performance. */); | |
6135 | ||
4b4deea2 | 6136 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6137 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6138 | |
4b4deea2 | 6139 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6140 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6141 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6142 | set when a file is visited. */); |
be9aafdd | 6143 | |
71ed49fa | 6144 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6145 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 6146 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
6147 | Should be a list of symbols naming formats that are defined in `format-alist'. |
6148 | If it is t, which is the default, auto-save files are written in the | |
6149 | same format as a regular save would use. */); | |
6150 | ||
3cb719bd | 6151 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6152 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6153 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6154 | The default is t, which means that text is invisible |
6155 | if it has a non-nil `invisible' property. | |
6156 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6157 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6158 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6159 | then characters with property value PROP are invisible, | |
6160 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6161 | |
7962a441 | 6162 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 6163 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 6164 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6165 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6166 | |
6167 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6168 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6169 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6170 | The function `set-window-buffer' updates this variable |
6171 | to the value obtained by calling `current-time'. | |
6172 | If the buffer has never been shown in a window, the value is nil. */); | |
6173 | ||
29208e82 | 6174 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6175 | doc: /* Non-nil if Transient Mark mode is enabled. |
6176 | See the command `transient-mark-mode' for a description of this minor mode. | |
6177 | ||
6178 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6179 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6180 | all windows or just the selected window. | |
6181 | ||
f49d1f52 | 6182 | Lisp programs may give this variable certain special values: |
9d794026 | 6183 | |
f49d1f52 SM |
6184 | - A value of `lambda' enables Transient Mark mode temporarily. |
6185 | It is disabled again after any subsequent action that would | |
6186 | normally deactivate the mark (e.g. buffer modification). | |
6187 | ||
6188 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6189 | temporarily. After any subsequent point motion command that is | |
6190 | not shift-translated, or any other action that would normally | |
6191 | deactivate the mark (e.g. buffer modification), the value of | |
6192 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6193 | Vtransient_mark_mode = Qnil; |
6194 | ||
29208e82 | 6195 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 6196 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6197 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6198 | text properties. If the value is a list, disregard `buffer-read-only' | |
6199 | and disregard a `read-only' text property if the property value | |
6200 | is a member of the list. */); | |
a96b68f1 RS |
6201 | Vinhibit_read_only = Qnil; |
6202 | ||
4b4deea2 | 6203 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6204 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6205 | Values are interpreted as follows: |
6206 | ||
b8dc613f JB |
6207 | t use the cursor specified for the frame |
6208 | nil don't display a cursor | |
6209 | box display a filled box cursor | |
6210 | hollow display a hollow box cursor | |
6211 | bar display a vertical bar cursor with default width | |
6212 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6213 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6214 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6215 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6216 | |
e08b1705 MR |
6217 | When the buffer is displayed in a non-selected window, the |
6218 | cursor's appearance is instead controlled by the variable | |
6219 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6220 | |
a3bbced0 | 6221 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6222 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6223 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6224 | The space is measured in pixels, and put below lines on graphic displays, |
6225 | see `display-graphic-p'. | |
60ebfdf3 | 6226 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6227 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6228 | |
0124c5bd | 6229 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6230 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6231 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6232 | If nil, only shows a cursor in the selected window. |
6233 | If t, displays a cursor related to the usual cursor type | |
6234 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6235 | You can also specify the cursor type as in the `cursor-type' variable. | |
6236 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6237 | |
29208e82 | 6238 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6239 | doc: /* List of functions called with no args to query before killing a buffer. |
6240 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6241 | |
6242 | If any of them returns nil, the buffer is not killed. Functions run by | |
6243 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6244 | Vkill_buffer_query_functions = Qnil; |
6245 | ||
29208e82 | 6246 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6247 | doc: /* Normal hook run before changing the major mode of a buffer. |
6248 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6249 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6250 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6251 | |
9397e56f MR |
6252 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6253 | doc: /* Hook run when the buffer list changes. | |
6254 | Functions running this hook are `get-buffer-create', | |
6255 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6256 | and `bury-buffer-internal'. */); |
9397e56f | 6257 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6258 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6259 | |
0dc88e60 | 6260 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6261 | defsubr (&Sbuffer_list); |
6262 | defsubr (&Sget_buffer); | |
6263 | defsubr (&Sget_file_buffer); | |
6264 | defsubr (&Sget_buffer_create); | |
336cd056 | 6265 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6266 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6267 | defsubr (&Sbuffer_name); |
1ab256cb | 6268 | defsubr (&Sbuffer_file_name); |
336cd056 | 6269 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6270 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6271 | defsubr (&Sbuffer_local_variables); |
6272 | defsubr (&Sbuffer_modified_p); | |
6273 | defsubr (&Sset_buffer_modified_p); | |
6274 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6275 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6276 | defsubr (&Srename_buffer); |
6277 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6278 | defsubr (&Sbuffer_enable_undo); |
6279 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6280 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6281 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6282 | defsubr (&Scurrent_buffer); |
6283 | defsubr (&Sset_buffer); | |
6284 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6285 | defsubr (&Serase_buffer); |
13cda5f9 | 6286 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6287 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6288 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6289 | |
52f8ec73 | 6290 | defsubr (&Soverlayp); |
2eec3b4e RS |
6291 | defsubr (&Smake_overlay); |
6292 | defsubr (&Sdelete_overlay); | |
c5e28e39 | 6293 | defsubr (&Sdelete_all_overlays); |
2eec3b4e | 6294 | defsubr (&Smove_overlay); |
8ebafa8d JB |
6295 | defsubr (&Soverlay_start); |
6296 | defsubr (&Soverlay_end); | |
6297 | defsubr (&Soverlay_buffer); | |
6298 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6299 | defsubr (&Soverlays_at); |
74514898 | 6300 | defsubr (&Soverlays_in); |
2eec3b4e | 6301 | defsubr (&Snext_overlay_change); |
239c932b | 6302 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6303 | defsubr (&Soverlay_recenter); |
6304 | defsubr (&Soverlay_lists); | |
6305 | defsubr (&Soverlay_get); | |
6306 | defsubr (&Soverlay_put); | |
a8c21b48 | 6307 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6308 | } |
6309 | ||
dfcf069d | 6310 | void |
d3da34e0 | 6311 | keys_of_buffer (void) |
1ab256cb RM |
6312 | { |
6313 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6314 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6315 | |
6316 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6317 | initialized when that function gets called. */ | |
d67b4f80 | 6318 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6319 | } |