Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
08327b22 | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 2002 |
c922bc55 | 3 | Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 9 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 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> |
9dde47f5 | 29 | |
2538fae4 | 30 | #ifndef USE_CRT_DLL |
9dde47f5 | 31 | extern int errno; |
2538fae4 | 32 | #endif |
1ab256cb RM |
33 | |
34 | #ifndef MAXPATHLEN | |
35 | /* in 4.1, param.h fails to define this. */ | |
36 | #define MAXPATHLEN 1024 | |
37 | #endif /* not MAXPATHLEN */ | |
38 | ||
dfcf069d AS |
39 | #ifdef HAVE_UNISTD_H |
40 | #include <unistd.h> | |
41 | #endif | |
7ee72033 | 42 | |
1ab256cb | 43 | #include "lisp.h" |
21cf4cf8 | 44 | #include "intervals.h" |
1ab256cb RM |
45 | #include "window.h" |
46 | #include "commands.h" | |
47 | #include "buffer.h" | |
3b06f880 | 48 | #include "charset.h" |
28e969dd | 49 | #include "region-cache.h" |
1ab256cb | 50 | #include "indent.h" |
d014bf88 | 51 | #include "blockinput.h" |
2538fae4 | 52 | #include "keyboard.h" |
e35f6ff7 | 53 | #include "keymap.h" |
08460cd4 | 54 | #include "frame.h" |
1ab256cb RM |
55 | |
56 | struct buffer *current_buffer; /* the current buffer */ | |
57 | ||
58 | /* First buffer in chain of all buffers (in reverse order of creation). | |
59 | Threaded through ->next. */ | |
60 | ||
61 | struct buffer *all_buffers; | |
62 | ||
63 | /* This structure holds the default values of the buffer-local variables | |
64 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
65 | The default value occupies the same slot in this structure | |
66 | as an individual buffer's value occupies in that buffer. | |
67 | Setting the default value also goes through the alist of buffers | |
68 | and stores into each buffer that does not say it has a local value. */ | |
69 | ||
70 | struct buffer buffer_defaults; | |
71 | ||
72 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
73 | ||
74 | static Lisp_Object Vbuffer_defaults; | |
75 | ||
76 | /* This structure marks which slots in a buffer have corresponding | |
77 | default values in buffer_defaults. | |
78 | Each such slot has a nonzero value in this structure. | |
79 | The value has only one nonzero bit. | |
80 | ||
81 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
82 | the entry for that slot (found in the same slot in this structure) |
83 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
84 | |
85 | If a slot in this structure is -1, then even though there may | |
86 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
87 | and the corresponding slot in buffer_defaults is not used. | |
88 | ||
89 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
90 | but there is a default value which is copied into each buffer. | |
91 | ||
92 | If a slot in this structure is negative, then even though there may | |
93 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
94 | and the corresponding slot in buffer_defaults is not used. | |
95 | ||
96 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
97 | zero, that is a bug */ | |
98 | ||
99 | struct buffer buffer_local_flags; | |
100 | ||
101 | /* This structure holds the names of symbols whose values may be | |
102 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
103 | ||
104 | struct buffer buffer_local_symbols; | |
105 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
106 | static Lisp_Object Vbuffer_local_symbols; | |
107 | ||
0fa3ba92 JB |
108 | /* This structure holds the required types for the values in the |
109 | buffer-local slots. If a slot contains Qnil, then the | |
110 | corresponding buffer slot may contain a value of any type. If a | |
111 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
112 | equal to that integer (except nil is always allowed). |
113 | When a tag does not match, the function | |
114 | buffer_slot_type_mismatch will signal an error. | |
115 | ||
116 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
117 | struct buffer buffer_local_types; |
118 | ||
13de9290 RS |
119 | /* Flags indicating which built-in buffer-local variables |
120 | are permanent locals. */ | |
7313acd0 | 121 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
122 | |
123 | /* Number of per-buffer variables used. */ | |
124 | ||
7313acd0 | 125 | int last_per_buffer_idx; |
13de9290 | 126 | |
1ab256cb | 127 | Lisp_Object Fset_buffer (); |
01050cb5 | 128 | void set_buffer_internal (); |
c7aa5005 | 129 | void set_buffer_internal_1 (); |
173f2a64 | 130 | static void call_overlay_mod_hooks (); |
2f3f993b | 131 | static void swap_out_buffer_local_variables (); |
13de9290 | 132 | static void reset_buffer_local_variables (); |
1ab256cb RM |
133 | |
134 | /* Alist of all buffer names vs the buffers. */ | |
135 | /* This used to be a variable, but is no longer, | |
136 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
137 | Lisp_Object Vbuffer_alist; | |
138 | ||
139 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
140 | Lisp_Object Vbefore_change_functions; |
141 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 142 | |
c48f61ef RS |
143 | Lisp_Object Vtransient_mark_mode; |
144 | ||
a96b68f1 RS |
145 | /* t means ignore all read-only text properties. |
146 | A list means ignore such a property if its value is a member of the list. | |
147 | Any non-nil value means ignore buffer-read-only. */ | |
148 | Lisp_Object Vinhibit_read_only; | |
149 | ||
dcdffbf6 RS |
150 | /* List of functions to call that can query about killing a buffer. |
151 | If any of these functions returns nil, we don't kill it. */ | |
152 | Lisp_Object Vkill_buffer_query_functions; | |
153 | ||
dbc4e1c1 JB |
154 | /* List of functions to call before changing an unmodified buffer. */ |
155 | Lisp_Object Vfirst_change_hook; | |
22378665 | 156 | |
dbc4e1c1 | 157 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
158 | Lisp_Object Qbefore_change_functions; |
159 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 160 | |
7775635d KH |
161 | /* If nonzero, all modification hooks are suppressed. */ |
162 | int inhibit_modification_hooks; | |
163 | ||
1ab256cb RM |
164 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
165 | ||
166 | Lisp_Object Qprotected_field; | |
167 | ||
168 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
169 | ||
170 | Lisp_Object Qkill_buffer_hook; | |
171 | ||
5fe0b67e RS |
172 | Lisp_Object Qget_file_buffer; |
173 | ||
52f8ec73 JB |
174 | Lisp_Object Qoverlayp; |
175 | ||
bbbe9545 | 176 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 177 | |
294d215f RS |
178 | Lisp_Object Qmodification_hooks; |
179 | Lisp_Object Qinsert_in_front_hooks; | |
180 | Lisp_Object Qinsert_behind_hooks; | |
181 | ||
b86af064 GM |
182 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
183 | static void free_buffer_text P_ ((struct buffer *b)); | |
04e4cb3a | 184 | static Lisp_Object copy_overlays P_ ((struct buffer *, Lisp_Object)); |
26f545d7 | 185 | static void modify_overlay P_ ((struct buffer *, int, int)); |
b86af064 GM |
186 | |
187 | ||
1ab256cb RM |
188 | /* For debugging; temporary. See set_buffer_internal. */ |
189 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
190 | ||
01136e9b | 191 | void |
1ab256cb RM |
192 | nsberror (spec) |
193 | Lisp_Object spec; | |
194 | { | |
a7a60ce9 | 195 | if (STRINGP (spec)) |
d5db4077 | 196 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
197 | error ("Invalid buffer argument"); |
198 | } | |
199 | \f | |
0dc88e60 | 200 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
201 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
202 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
203 | (object) | |
0dc88e60 RS |
204 | Lisp_Object object; |
205 | { | |
206 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
207 | ? Qt : Qnil); | |
208 | } | |
209 | ||
08460cd4 | 210 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 MB |
211 | doc: /* Return a list of all existing live buffers. |
212 | If the optional arg FRAME is a frame, we return that frame's buffer list. */) | |
213 | (frame) | |
08460cd4 | 214 | Lisp_Object frame; |
1ab256cb | 215 | { |
08460cd4 RS |
216 | Lisp_Object framelist, general; |
217 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
218 | ||
219 | if (FRAMEP (frame)) | |
220 | { | |
221 | Lisp_Object tail; | |
222 | ||
b7826503 | 223 | CHECK_FRAME (frame); |
08460cd4 RS |
224 | |
225 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
226 | ||
227 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
228 | tail = framelist; | |
229 | while (! NILP (tail)) | |
230 | { | |
7539e11f KR |
231 | general = Fdelq (XCAR (tail), general); |
232 | tail = XCDR (tail); | |
08460cd4 RS |
233 | } |
234 | return nconc2 (framelist, general); | |
235 | } | |
236 | ||
237 | return general; | |
1ab256cb RM |
238 | } |
239 | ||
04ae1b48 RS |
240 | /* Like Fassoc, but use Fstring_equal to compare |
241 | (which ignores text properties), | |
242 | and don't ever QUIT. */ | |
243 | ||
244 | static Lisp_Object | |
245 | assoc_ignore_text_properties (key, list) | |
246 | register Lisp_Object key; | |
247 | Lisp_Object list; | |
248 | { | |
249 | register Lisp_Object tail; | |
250 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
251 | { | |
252 | register Lisp_Object elt, tem; | |
253 | elt = Fcar (tail); | |
254 | tem = Fstring_equal (Fcar (elt), key); | |
255 | if (!NILP (tem)) | |
256 | return elt; | |
257 | } | |
258 | return Qnil; | |
259 | } | |
260 | ||
1ab256cb | 261 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 262 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 263 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
264 | NAME may also be a buffer; if so, the value is that buffer. */) |
265 | (name) | |
1ab256cb RM |
266 | register Lisp_Object name; |
267 | { | |
a7a60ce9 | 268 | if (BUFFERP (name)) |
1ab256cb | 269 | return name; |
b7826503 | 270 | CHECK_STRING (name); |
1ab256cb | 271 | |
04ae1b48 | 272 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
273 | } |
274 | ||
275 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 276 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
277 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
278 | If there is no such live buffer, return nil. | |
7ee72033 MB |
279 | See also `find-buffer-visiting'. */) |
280 | (filename) | |
1ab256cb RM |
281 | register Lisp_Object filename; |
282 | { | |
283 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
284 | Lisp_Object handler; |
285 | ||
b7826503 | 286 | CHECK_STRING (filename); |
1ab256cb RM |
287 | filename = Fexpand_file_name (filename, Qnil); |
288 | ||
5fe0b67e RS |
289 | /* If the file name has special constructs in it, |
290 | call the corresponding file handler. */ | |
a617e913 | 291 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
292 | if (!NILP (handler)) |
293 | return call2 (handler, Qget_file_buffer, filename); | |
294 | ||
7539e11f | 295 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 296 | { |
7539e11f | 297 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
298 | if (!BUFFERP (buf)) continue; |
299 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 300 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 301 | if (!NILP (tem)) |
1ab256cb RM |
302 | return buf; |
303 | } | |
304 | return Qnil; | |
305 | } | |
306 | ||
52e01189 RS |
307 | Lisp_Object |
308 | get_truename_buffer (filename) | |
309 | register Lisp_Object filename; | |
310 | { | |
311 | register Lisp_Object tail, buf, tem; | |
312 | ||
7539e11f | 313 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 314 | { |
7539e11f | 315 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
316 | if (!BUFFERP (buf)) continue; |
317 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
318 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
319 | if (!NILP (tem)) | |
320 | return buf; | |
321 | } | |
322 | return Qnil; | |
323 | } | |
324 | ||
1ab256cb RM |
325 | /* Incremented for each buffer created, to assign the buffer number. */ |
326 | int buffer_count; | |
327 | ||
328 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 329 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
330 | A new buffer is created if there is no live buffer named NAME. |
331 | If NAME starts with a space, the new buffer does not keep undo information. | |
332 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
333 | The value is never nil. */) |
334 | (name) | |
1ab256cb RM |
335 | register Lisp_Object name; |
336 | { | |
a9ee7a59 | 337 | register Lisp_Object buf; |
1ab256cb RM |
338 | register struct buffer *b; |
339 | ||
340 | buf = Fget_buffer (name); | |
265a9e55 | 341 | if (!NILP (buf)) |
1ab256cb RM |
342 | return buf; |
343 | ||
d5db4077 | 344 | if (SCHARS (name) == 0) |
31cd83e9 KH |
345 | error ("Empty string for buffer name is not allowed"); |
346 | ||
a21260d9 | 347 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 348 | |
336cd056 RS |
349 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
350 | ||
351 | /* An ordinary buffer uses its own struct buffer_text. */ | |
352 | b->text = &b->own_text; | |
353 | b->base_buffer = 0; | |
354 | ||
1ab256cb | 355 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 356 | BLOCK_INPUT; |
3b06f880 KH |
357 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
358 | anchoring a search. */ | |
b86af064 | 359 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 360 | UNBLOCK_INPUT; |
1ab256cb | 361 | if (! BUF_BEG_ADDR (b)) |
81841847 | 362 | buffer_memory_full (); |
1ab256cb RM |
363 | |
364 | BUF_PT (b) = 1; | |
365 | BUF_GPT (b) = 1; | |
366 | BUF_BEGV (b) = 1; | |
367 | BUF_ZV (b) = 1; | |
368 | BUF_Z (b) = 1; | |
3f236a40 RS |
369 | BUF_PT_BYTE (b) = 1; |
370 | BUF_GPT_BYTE (b) = 1; | |
371 | BUF_BEGV_BYTE (b) = 1; | |
372 | BUF_ZV_BYTE (b) = 1; | |
373 | BUF_Z_BYTE (b) = 1; | |
1ab256cb | 374 | BUF_MODIFF (b) = 1; |
2509d356 | 375 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
376 | BUF_SAVE_MODIFF (b) = 1; |
377 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
378 | BUF_UNCHANGED_MODIFIED (b) = 1; |
379 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
380 | BUF_END_UNCHANGED (b) = 0; | |
381 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 382 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 383 | |
28e969dd JB |
384 | b->newline_cache = 0; |
385 | b->width_run_cache = 0; | |
386 | b->width_table = Qnil; | |
b5a225b4 | 387 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 388 | |
1ab256cb RM |
389 | /* Put this on the chain of all buffers including killed ones. */ |
390 | b->next = all_buffers; | |
391 | all_buffers = b; | |
392 | ||
336cd056 RS |
393 | /* An ordinary buffer normally doesn't need markers |
394 | to handle BEGV and ZV. */ | |
395 | b->pt_marker = Qnil; | |
396 | b->begv_marker = Qnil; | |
397 | b->zv_marker = Qnil; | |
04ae1b48 RS |
398 | |
399 | name = Fcopy_sequence (name); | |
ab77f05c | 400 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 401 | b->name = name; |
04ae1b48 | 402 | |
d5db4077 | 403 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
404 | b->undo_list = Qnil; |
405 | else | |
406 | b->undo_list = Qt; | |
407 | ||
408 | reset_buffer (b); | |
13de9290 | 409 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
410 | |
411 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 412 | XSETBUFFER (buf, b); |
1ab256cb RM |
413 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
414 | ||
415 | b->mark = Fmake_marker (); | |
336cd056 RS |
416 | BUF_MARKERS (b) = Qnil; |
417 | b->name = name; | |
418 | return buf; | |
419 | } | |
420 | ||
7e9d5818 | 421 | |
04e4cb3a GM |
422 | /* Return a list of overlays which is a copy of the overlay list |
423 | LIST, but for buffer B. */ | |
424 | ||
425 | static Lisp_Object | |
426 | copy_overlays (b, list) | |
427 | struct buffer *b; | |
428 | Lisp_Object list; | |
429 | { | |
430 | Lisp_Object result, buffer; | |
431 | ||
432 | XSETBUFFER (buffer, b); | |
433 | ||
434 | for (result = Qnil; CONSP (list); list = XCDR (list)) | |
435 | { | |
436 | Lisp_Object overlay, start, end, old_overlay; | |
437 | int charpos; | |
438 | ||
439 | old_overlay = XCAR (list); | |
440 | charpos = marker_position (OVERLAY_START (old_overlay)); | |
441 | start = Fmake_marker (); | |
db3a49a6 | 442 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
443 | XMARKER (start)->insertion_type |
444 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
445 | ||
446 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
447 | end = Fmake_marker (); | |
db3a49a6 | 448 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
449 | XMARKER (end)->insertion_type |
450 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
451 | ||
452 | overlay = allocate_misc (); | |
453 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
454 | OVERLAY_START (overlay) = start; | |
455 | OVERLAY_END (overlay) = end; | |
456 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
457 | ||
458 | result = Fcons (overlay, result); | |
459 | } | |
460 | ||
461 | return Fnreverse (result); | |
462 | } | |
463 | ||
464 | ||
7e9d5818 GM |
465 | /* Clone per-buffer values of buffer FROM. |
466 | ||
467 | Buffer TO gets the same per-buffer values as FROM, with the | |
468 | following exceptions: (1) TO's name is left untouched, (2) markers | |
469 | are copied and made to refer to TO, and (3) overlay lists are | |
470 | copied. */ | |
471 | ||
472 | static void | |
473 | clone_per_buffer_values (from, to) | |
474 | struct buffer *from, *to; | |
475 | { | |
476 | Lisp_Object to_buffer; | |
477 | int offset; | |
478 | ||
479 | XSETBUFFER (to_buffer, to); | |
480 | ||
481 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); | |
482 | offset < sizeof *to; | |
483 | offset += sizeof (Lisp_Object)) | |
484 | { | |
485 | Lisp_Object obj; | |
486 | ||
487 | obj = PER_BUFFER_VALUE (from, offset); | |
488 | if (MARKERP (obj)) | |
489 | { | |
490 | struct Lisp_Marker *m = XMARKER (obj); | |
491 | obj = Fmake_marker (); | |
492 | XMARKER (obj)->insertion_type = m->insertion_type; | |
493 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
494 | } | |
495 | ||
496 | PER_BUFFER_VALUE (to, offset) = obj; | |
497 | } | |
498 | ||
7e9d5818 | 499 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
04e4cb3a GM |
500 | |
501 | to->overlays_before = copy_overlays (to, from->overlays_before); | |
502 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
7e9d5818 GM |
503 | } |
504 | ||
505 | ||
506 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, | |
507 | 2, 3, | |
193c3837 | 508 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 509 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
018ba359 PJ |
510 | BASE-BUFFER should be an existing buffer (or buffer name). |
511 | NAME should be a string which is not the name of an existing buffer. | |
512 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
513 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
514 | CLONE nil means the indirect buffer's state is reset to default values. */) |
515 | (base_buffer, name, clone) | |
7e9d5818 | 516 | Lisp_Object base_buffer, name, clone; |
336cd056 | 517 | { |
7e9d5818 GM |
518 | Lisp_Object buf; |
519 | struct buffer *b; | |
336cd056 RS |
520 | |
521 | buf = Fget_buffer (name); | |
522 | if (!NILP (buf)) | |
d5db4077 | 523 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 RS |
524 | |
525 | base_buffer = Fget_buffer (base_buffer); | |
526 | if (NILP (base_buffer)) | |
d5db4077 | 527 | error ("No such buffer: `%s'", SDATA (name)); |
336cd056 | 528 | |
d5db4077 | 529 | if (SCHARS (name) == 0) |
336cd056 RS |
530 | error ("Empty string for buffer name is not allowed"); |
531 | ||
a21260d9 | 532 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
533 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
534 | ||
535 | if (XBUFFER (base_buffer)->base_buffer) | |
536 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
537 | else | |
538 | b->base_buffer = XBUFFER (base_buffer); | |
539 | ||
540 | /* Use the base buffer's text object. */ | |
541 | b->text = b->base_buffer->text; | |
542 | ||
543 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
544 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
545 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
546 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
547 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
548 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
549 | |
550 | b->newline_cache = 0; | |
551 | b->width_run_cache = 0; | |
552 | b->width_table = Qnil; | |
553 | ||
554 | /* Put this on the chain of all buffers including killed ones. */ | |
555 | b->next = all_buffers; | |
556 | all_buffers = b; | |
557 | ||
558 | name = Fcopy_sequence (name); | |
ab77f05c | 559 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
560 | b->name = name; |
561 | ||
562 | reset_buffer (b); | |
13de9290 | 563 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
564 | |
565 | /* Put this in the alist of all live buffers. */ | |
566 | XSETBUFFER (buf, b); | |
567 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
568 | ||
569 | b->mark = Fmake_marker (); | |
1ab256cb | 570 | b->name = name; |
336cd056 | 571 | |
abc9d959 RS |
572 | /* The multibyte status belongs to the base buffer. */ |
573 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
574 | ||
336cd056 RS |
575 | /* Make sure the base buffer has markers for its narrowing. */ |
576 | if (NILP (b->base_buffer->pt_marker)) | |
577 | { | |
578 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
579 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
580 | BUF_PT (b->base_buffer), | |
581 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
582 | } |
583 | if (NILP (b->base_buffer->begv_marker)) | |
584 | { | |
585 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
586 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
587 | BUF_BEGV (b->base_buffer), | |
588 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
589 | } |
590 | if (NILP (b->base_buffer->zv_marker)) | |
591 | { | |
592 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
593 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
594 | BUF_ZV (b->base_buffer), | |
595 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 596 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
597 | } |
598 | ||
7e9d5818 GM |
599 | if (NILP (clone)) |
600 | { | |
601 | /* Give the indirect buffer markers for its narrowing. */ | |
602 | b->pt_marker = Fmake_marker (); | |
603 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
604 | b->begv_marker = Fmake_marker (); | |
605 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
606 | b->zv_marker = Fmake_marker (); | |
607 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
608 | XMARKER (b->zv_marker)->insertion_type = 1; | |
609 | } | |
610 | else | |
611 | clone_per_buffer_values (b->base_buffer, b); | |
336cd056 | 612 | |
a9ee7a59 | 613 | return buf; |
1ab256cb RM |
614 | } |
615 | ||
bcd40520 RS |
616 | /* Reinitialize everything about a buffer except its name and contents |
617 | and local variables. */ | |
1ab256cb RM |
618 | |
619 | void | |
620 | reset_buffer (b) | |
621 | register struct buffer *b; | |
622 | { | |
623 | b->filename = Qnil; | |
f6ed2e84 | 624 | b->file_truename = Qnil; |
1ab256cb RM |
625 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
626 | b->modtime = 0; | |
8d7a4592 | 627 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 628 | b->last_window_start = 1; |
8b264726 | 629 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
630 | b->clip_changed = 0; |
631 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
632 | b->backed_up = Qnil; |
633 | b->auto_save_modified = 0; | |
84f6bcba | 634 | b->auto_save_failure_time = -1; |
1ab256cb RM |
635 | b->auto_save_file_name = Qnil; |
636 | b->read_only = Qnil; | |
2eec3b4e RS |
637 | b->overlays_before = Qnil; |
638 | b->overlays_after = Qnil; | |
8d7a4592 | 639 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 640 | b->mark_active = Qnil; |
943e065b | 641 | b->point_before_scroll = Qnil; |
be9aafdd | 642 | b->file_format = Qnil; |
0dc6f165 | 643 | b->last_selected_window = Qnil; |
7962a441 | 644 | XSETINT (b->display_count, 0); |
3fd364db | 645 | b->display_time = Qnil; |
1bf08baf | 646 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 647 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 648 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
649 | |
650 | b->display_error_modiff = 0; | |
1ab256cb RM |
651 | } |
652 | ||
bcd40520 RS |
653 | /* Reset buffer B's local variables info. |
654 | Don't use this on a buffer that has already been in use; | |
655 | it does not treat permanent locals consistently. | |
13de9290 RS |
656 | Instead, use Fkill_all_local_variables. |
657 | ||
658 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
659 | buffer-local variables. If PERMANENT_TOO is 0, | |
660 | we preserve those. */ | |
bcd40520 | 661 | |
13de9290 RS |
662 | static void |
663 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 664 | register struct buffer *b; |
13de9290 | 665 | int permanent_too; |
1ab256cb RM |
666 | { |
667 | register int offset; | |
7c02e886 | 668 | int i; |
1ab256cb RM |
669 | |
670 | /* Reset the major mode to Fundamental, together with all the | |
671 | things that depend on the major mode. | |
672 | default-major-mode is handled at a higher level. | |
673 | We ignore it here. */ | |
674 | b->major_mode = Qfundamental_mode; | |
675 | b->keymap = Qnil; | |
676 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
677 | b->mode_name = QSFundamental; | |
678 | b->minor_modes = Qnil; | |
3446af9c RS |
679 | |
680 | /* If the standard case table has been altered and invalidated, | |
681 | fix up its insides first. */ | |
682 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
683 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
684 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
685 | Fset_standard_case_table (Vascii_downcase_table); | |
686 | ||
1ab256cb | 687 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
688 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
689 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
690 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 691 | b->invisibility_spec = Qt; |
2e716096 RS |
692 | #ifndef DOS_NT |
693 | b->buffer_file_type = Qnil; | |
694 | #endif | |
3cb719bd | 695 | |
13de9290 | 696 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 697 | b->local_var_alist = Qnil; |
7313acd0 | 698 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 699 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 700 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
701 | |
702 | /* For each slot that has a default value, | |
703 | copy that into the slot. */ | |
704 | ||
7313acd0 | 705 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
706 | offset < sizeof *b; |
707 | offset += sizeof (Lisp_Object)) | |
aab80822 | 708 | { |
7313acd0 | 709 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
710 | if ((idx > 0 |
711 | && (permanent_too | |
712 | || buffer_permanent_local_flags[idx] == 0)) | |
713 | /* Is -2 used anywhere? */ | |
714 | || idx == -2) | |
7313acd0 | 715 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 716 | } |
1ab256cb RM |
717 | } |
718 | ||
01050cb5 RM |
719 | /* We split this away from generate-new-buffer, because rename-buffer |
720 | and set-visited-file-name ought to be able to use this to really | |
721 | rename the buffer properly. */ | |
722 | ||
723 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 724 | 1, 2, 0, |
7ee72033 | 725 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
726 | If there is no live buffer named NAME, then return NAME. |
727 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
728 | until an unused name is found, and then return that name. | |
729 | Optional second argument IGNORE specifies a name that is okay to use | |
730 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
731 | even if a buffer with that name exists. */) |
732 | (name, ignore) | |
c273e647 | 733 | register Lisp_Object name, ignore; |
1ab256cb RM |
734 | { |
735 | register Lisp_Object gentemp, tem; | |
736 | int count; | |
737 | char number[10]; | |
738 | ||
b7826503 | 739 | CHECK_STRING (name); |
1ab256cb RM |
740 | |
741 | tem = Fget_buffer (name); | |
265a9e55 | 742 | if (NILP (tem)) |
01050cb5 | 743 | return name; |
1ab256cb RM |
744 | |
745 | count = 1; | |
746 | while (1) | |
747 | { | |
748 | sprintf (number, "<%d>", ++count); | |
749 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 750 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
751 | if (!NILP (tem)) |
752 | return gentemp; | |
1ab256cb | 753 | tem = Fget_buffer (gentemp); |
265a9e55 | 754 | if (NILP (tem)) |
01050cb5 | 755 | return gentemp; |
1ab256cb RM |
756 | } |
757 | } | |
758 | ||
759 | \f | |
760 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
761 | doc: /* Return the name of BUFFER, as a string. |
762 | With no argument or nil as argument, return the name of the current buffer. */) | |
763 | (buffer) | |
1ab256cb RM |
764 | register Lisp_Object buffer; |
765 | { | |
265a9e55 | 766 | if (NILP (buffer)) |
1ab256cb | 767 | return current_buffer->name; |
b7826503 | 768 | CHECK_BUFFER (buffer); |
1ab256cb RM |
769 | return XBUFFER (buffer)->name; |
770 | } | |
771 | ||
772 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
773 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
774 | No argument or nil as argument means use the current buffer. */) | |
775 | (buffer) | |
1ab256cb RM |
776 | register Lisp_Object buffer; |
777 | { | |
265a9e55 | 778 | if (NILP (buffer)) |
1ab256cb | 779 | return current_buffer->filename; |
b7826503 | 780 | CHECK_BUFFER (buffer); |
1ab256cb RM |
781 | return XBUFFER (buffer)->filename; |
782 | } | |
783 | ||
336cd056 RS |
784 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
785 | 0, 1, 0, | |
7ee72033 MB |
786 | doc: /* Return the base buffer of indirect buffer BUFFER. |
787 | If BUFFER is not indirect, return nil. */) | |
788 | (buffer) | |
336cd056 RS |
789 | register Lisp_Object buffer; |
790 | { | |
791 | struct buffer *base; | |
792 | Lisp_Object base_buffer; | |
793 | ||
794 | if (NILP (buffer)) | |
795 | base = current_buffer->base_buffer; | |
796 | else | |
797 | { | |
b7826503 | 798 | CHECK_BUFFER (buffer); |
336cd056 RS |
799 | base = XBUFFER (buffer)->base_buffer; |
800 | } | |
801 | ||
802 | if (! base) | |
803 | return Qnil; | |
804 | XSETBUFFER (base_buffer, base); | |
805 | return base_buffer; | |
806 | } | |
807 | ||
79aa712d RS |
808 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
809 | Sbuffer_local_value, 2, 2, 0, | |
810 | doc: /* Return the value of VARIABLE in BUFFER. | |
811 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
812 | is the default binding of variable. */) | |
813 | (symbol, buffer) | |
814 | register Lisp_Object symbol; | |
815 | register Lisp_Object buffer; | |
816 | { | |
817 | register struct buffer *buf; | |
818 | register Lisp_Object result; | |
819 | ||
ae69175b RS |
820 | CHECK_SYMBOL (symbol); |
821 | CHECK_BUFFER (buffer); | |
79aa712d RS |
822 | buf = XBUFFER (buffer); |
823 | ||
824 | /* Look in local_var_list */ | |
825 | result = Fassoc (symbol, buf->local_var_alist); | |
826 | if (NILP (result)) | |
827 | { | |
828 | int offset, idx; | |
829 | int found = 0; | |
830 | ||
831 | /* Look in special slots */ | |
832 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
833 | offset < sizeof (struct buffer); | |
834 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
835 | offset += (sizeof (EMACS_INT))) | |
836 | { | |
837 | idx = PER_BUFFER_IDX (offset); | |
838 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
839 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) | |
840 | && EQ (PER_BUFFER_SYMBOL (offset), symbol)) | |
841 | { | |
842 | result = PER_BUFFER_VALUE (buf, offset); | |
843 | found = 1; | |
844 | break; | |
845 | } | |
846 | } | |
847 | ||
848 | if (!found) | |
849 | result = Fdefault_value (symbol); | |
850 | } | |
851 | else | |
f0bac7de RS |
852 | { |
853 | Lisp_Object valcontents; | |
854 | Lisp_Object current_alist_element; | |
855 | ||
856 | /* What binding is loaded right now? */ | |
857 | valcontents = SYMBOL_VALUE (symbol); | |
858 | current_alist_element | |
859 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
860 | ||
861 | /* The value of the currently loaded binding is not | |
862 | stored in it, but rather in the realvalue slot. | |
863 | Store that value into the binding it belongs to | |
864 | in case that is the one we are about to use. */ | |
865 | ||
866 | Fsetcdr (current_alist_element, | |
867 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
868 | ||
869 | /* Now get the (perhaps updated) value out of the binding. */ | |
870 | result = XCDR (result); | |
871 | } | |
79aa712d RS |
872 | |
873 | if (EQ (result, Qunbound)) | |
874 | return Fsignal (Qvoid_variable, Fcons (symbol, Qnil)); | |
875 | ||
876 | return result; | |
877 | } | |
878 | ||
1ab256cb | 879 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 880 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 881 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
882 | Most elements look like (SYMBOL . VALUE), describing one variable. |
883 | For a symbol that is locally unbound, just the symbol appears in the value. | |
884 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
885 | No argument or nil as argument means use current buffer as BUFFER. */) |
886 | (buffer) | |
1ab256cb RM |
887 | register Lisp_Object buffer; |
888 | { | |
889 | register struct buffer *buf; | |
553defa4 | 890 | register Lisp_Object result; |
1ab256cb | 891 | |
265a9e55 | 892 | if (NILP (buffer)) |
1ab256cb RM |
893 | buf = current_buffer; |
894 | else | |
895 | { | |
b7826503 | 896 | CHECK_BUFFER (buffer); |
1ab256cb RM |
897 | buf = XBUFFER (buffer); |
898 | } | |
899 | ||
553defa4 RS |
900 | result = Qnil; |
901 | ||
1ab256cb | 902 | { |
553defa4 | 903 | register Lisp_Object tail; |
7539e11f | 904 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 905 | { |
553defa4 RS |
906 | Lisp_Object val, elt; |
907 | ||
7539e11f | 908 | elt = XCAR (tail); |
553defa4 | 909 | |
e0585c64 RS |
910 | /* Reference each variable in the alist in buf. |
911 | If inquiring about the current buffer, this gets the current values, | |
912 | so store them into the alist so the alist is up to date. | |
913 | If inquiring about some other buffer, this swaps out any values | |
914 | for that buffer, making the alist up to date automatically. */ | |
7539e11f | 915 | val = find_symbol_value (XCAR (elt)); |
e0585c64 RS |
916 | /* Use the current buffer value only if buf is the current buffer. */ |
917 | if (buf != current_buffer) | |
7539e11f | 918 | val = XCDR (elt); |
553defa4 RS |
919 | |
920 | /* If symbol is unbound, put just the symbol in the list. */ | |
921 | if (EQ (val, Qunbound)) | |
7539e11f | 922 | result = Fcons (XCAR (elt), result); |
553defa4 RS |
923 | /* Otherwise, put (symbol . value) in the list. */ |
924 | else | |
7539e11f | 925 | result = Fcons (Fcons (XCAR (elt), val), result); |
1ab256cb RM |
926 | } |
927 | } | |
928 | ||
1ab256cb RM |
929 | /* Add on all the variables stored in special slots. */ |
930 | { | |
7c02e886 | 931 | int offset, idx; |
1ab256cb | 932 | |
7313acd0 | 933 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 934 | offset < sizeof (struct buffer); |
7c02e886 GM |
935 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
936 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 937 | { |
7313acd0 GM |
938 | idx = PER_BUFFER_IDX (offset); |
939 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
940 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
941 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
942 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 943 | result); |
1ab256cb RM |
944 | } |
945 | } | |
553defa4 RS |
946 | |
947 | return result; | |
1ab256cb RM |
948 | } |
949 | ||
950 | \f | |
951 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 952 | 0, 1, 0, |
7ee72033 MB |
953 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
954 | No argument or nil as argument means use current buffer as BUFFER. */) | |
955 | (buffer) | |
1ab256cb RM |
956 | register Lisp_Object buffer; |
957 | { | |
958 | register struct buffer *buf; | |
265a9e55 | 959 | if (NILP (buffer)) |
1ab256cb RM |
960 | buf = current_buffer; |
961 | else | |
962 | { | |
b7826503 | 963 | CHECK_BUFFER (buffer); |
1ab256cb RM |
964 | buf = XBUFFER (buffer); |
965 | } | |
966 | ||
336cd056 | 967 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
968 | } |
969 | ||
970 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 971 | 1, 1, 0, |
7ee72033 MB |
972 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
973 | A non-nil FLAG means mark the buffer modified. */) | |
974 | (flag) | |
1ab256cb RM |
975 | register Lisp_Object flag; |
976 | { | |
977 | register int already; | |
978 | register Lisp_Object fn; | |
8ec01c70 | 979 | Lisp_Object buffer, window; |
1ab256cb RM |
980 | |
981 | #ifdef CLASH_DETECTION | |
982 | /* If buffer becoming modified, lock the file. | |
983 | If buffer becoming unmodified, unlock the file. */ | |
984 | ||
60f4dd23 | 985 | fn = current_buffer->file_truename; |
90d456d2 KH |
986 | /* Test buffer-file-name so that binding it to nil is effective. */ |
987 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 988 | { |
336cd056 | 989 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 990 | if (!already && !NILP (flag)) |
1ab256cb | 991 | lock_file (fn); |
265a9e55 | 992 | else if (already && NILP (flag)) |
1ab256cb RM |
993 | unlock_file (fn); |
994 | } | |
995 | #endif /* CLASH_DETECTION */ | |
996 | ||
336cd056 | 997 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
8ec01c70 GM |
998 | |
999 | /* Set update_mode_lines only if buffer is displayed in some window. | |
1000 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1001 | state by recording/restoring the state around blocks of code. | |
1002 | Setting update_mode_lines makes redisplay consider all windows | |
1003 | (on all frames). Stealth fontification of buffers not displayed | |
1004 | would incur additional redisplay costs if we'd set | |
1005 | update_modes_lines unconditionally. | |
1006 | ||
1007 | Ideally, I think there should be another mechanism for fontifying | |
1008 | buffers without "modifying" buffers, or redisplay should be | |
1009 | smarter about updating the `*' in mode lines. --gerd */ | |
1010 | XSETBUFFER (buffer, current_buffer); | |
1011 | window = Fget_buffer_window (buffer, Qt); | |
1012 | if (WINDOWP (window)) | |
d57b83b3 GM |
1013 | { |
1014 | ++update_mode_lines; | |
1015 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1016 | } | |
8ec01c70 | 1017 | |
1ab256cb RM |
1018 | return flag; |
1019 | } | |
1020 | ||
a8c21b48 GM |
1021 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1022 | Srestore_buffer_modified_p, 1, 1, 0, | |
7ee72033 | 1023 | doc: /* Like `set-buffer-modified-p', with a differences concerning redisplay. |
018ba359 | 1024 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1025 | state of the current buffer. Use with care. */) |
1026 | (flag) | |
a8c21b48 GM |
1027 | Lisp_Object flag; |
1028 | { | |
1029 | #ifdef CLASH_DETECTION | |
1030 | Lisp_Object fn; | |
1031 | ||
1032 | /* If buffer becoming modified, lock the file. | |
1033 | If buffer becoming unmodified, unlock the file. */ | |
1034 | ||
1035 | fn = current_buffer->file_truename; | |
1036 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1037 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1038 | { | |
1039 | int already = SAVE_MODIFF < MODIFF; | |
1040 | if (!already && !NILP (flag)) | |
1041 | lock_file (fn); | |
1042 | else if (already && NILP (flag)) | |
1043 | unlock_file (fn); | |
1044 | } | |
1045 | #endif /* CLASH_DETECTION */ | |
1046 | ||
1047 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; | |
1048 | return flag; | |
1049 | } | |
1050 | ||
1ab256cb | 1051 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1052 | 0, 1, 0, |
7ee72033 | 1053 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1054 | Each buffer has a tick counter which is incremented each time the text in |
1055 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1056 | No argument or nil as argument means use current buffer as BUFFER. */) |
1057 | (buffer) | |
1ab256cb RM |
1058 | register Lisp_Object buffer; |
1059 | { | |
1060 | register struct buffer *buf; | |
265a9e55 | 1061 | if (NILP (buffer)) |
1ab256cb RM |
1062 | buf = current_buffer; |
1063 | else | |
1064 | { | |
b7826503 | 1065 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1066 | buf = XBUFFER (buffer); |
1067 | } | |
1068 | ||
1069 | return make_number (BUF_MODIFF (buf)); | |
1070 | } | |
1071 | \f | |
01050cb5 | 1072 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1073 | "sRename buffer (to new name): \nP", |
7ee72033 | 1074 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1075 | If second arg UNIQUE is nil or omitted, it is an error if a |
1076 | buffer named NEWNAME already exists. | |
1077 | If UNIQUE is non-nil, come up with a new name using | |
1078 | `generate-new-buffer-name'. | |
1079 | Interactively, you can set UNIQUE with a prefix argument. | |
1080 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1081 | This does not change the name of the visited file (if any). */) |
1082 | (newname, unique) | |
489c043a | 1083 | register Lisp_Object newname, unique; |
1ab256cb RM |
1084 | { |
1085 | register Lisp_Object tem, buf; | |
1086 | ||
b7826503 | 1087 | CHECK_STRING (newname); |
d59698c4 | 1088 | |
d5db4077 | 1089 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1090 | error ("Empty string is invalid as a buffer name"); |
1091 | ||
489c043a | 1092 | tem = Fget_buffer (newname); |
265a9e55 | 1093 | if (!NILP (tem)) |
01050cb5 | 1094 | { |
8801a864 KR |
1095 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1096 | rename the buffer automatically so you can create another | |
1097 | with the original name. It makes UNIQUE equivalent to | |
1098 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1099 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1100 | return current_buffer->name; | |
3bd779aa | 1101 | if (!NILP (unique)) |
489c043a | 1102 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1103 | else |
d5db4077 | 1104 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1105 | } |
1ab256cb | 1106 | |
489c043a | 1107 | current_buffer->name = newname; |
76f590d7 JB |
1108 | |
1109 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1110 | any windows displaying current_buffer will stay unchanged. */ | |
1111 | update_mode_lines++; | |
1112 | ||
67180c6a | 1113 | XSETBUFFER (buf, current_buffer); |
489c043a | 1114 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1115 | if (NILP (current_buffer->filename) |
1116 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1117 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1118 | /* Refetch since that last call may have done GC. */ |
1119 | return current_buffer->name; | |
1ab256cb RM |
1120 | } |
1121 | ||
773fbdb9 | 1122 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1123 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1124 | Buffers not visible in windows are preferred to visible buffers, |
1125 | unless optional second argument VISIBLE-OK is non-nil. | |
1126 | If the optional third argument FRAME is non-nil, use that frame's | |
1127 | buffer list instead of the selected frame's buffer list. | |
1128 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1129 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1130 | (buffer, visible_ok, frame) | |
773fbdb9 | 1131 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1132 | { |
89132f25 | 1133 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1134 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1135 | notsogood = Qnil; |
1136 | ||
773fbdb9 | 1137 | if (NILP (frame)) |
9ba9623d | 1138 | frame = selected_frame; |
773fbdb9 | 1139 | |
7962a441 | 1140 | tail = Vbuffer_alist; |
773fbdb9 | 1141 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1142 | |
1143 | /* Consider buffers that have been seen in the selected frame | |
1144 | before other buffers. */ | |
1145 | ||
773fbdb9 | 1146 | tem = frame_buffer_list (frame); |
7962a441 RS |
1147 | add_ons = Qnil; |
1148 | while (CONSP (tem)) | |
1149 | { | |
7539e11f KR |
1150 | if (BUFFERP (XCAR (tem))) |
1151 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1152 | tem = XCDR (tem); | |
7962a441 RS |
1153 | } |
1154 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1155 | ||
1156 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
1157 | { |
1158 | buf = Fcdr (Fcar (tail)); | |
1159 | if (EQ (buf, buffer)) | |
1160 | continue; | |
10ceceb8 | 1161 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1162 | continue; |
04ae1b48 RS |
1163 | /* If the selected frame has a buffer_predicate, |
1164 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1165 | if (!NILP (pred)) |
04ae1b48 | 1166 | { |
7962a441 | 1167 | tem = call1 (pred, buf); |
04ae1b48 RS |
1168 | if (NILP (tem)) |
1169 | continue; | |
1170 | } | |
04ae1b48 | 1171 | |
a0ebb746 | 1172 | if (NILP (visible_ok)) |
66ffe51c | 1173 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1174 | else |
1175 | tem = Qnil; | |
265a9e55 | 1176 | if (NILP (tem)) |
1ab256cb | 1177 | return buf; |
265a9e55 | 1178 | if (NILP (notsogood)) |
1ab256cb RM |
1179 | notsogood = buf; |
1180 | } | |
265a9e55 | 1181 | if (!NILP (notsogood)) |
1ab256cb | 1182 | return notsogood; |
dba1a30a GM |
1183 | buf = Fget_buffer (build_string ("*scratch*")); |
1184 | if (NILP (buf)) | |
1185 | { | |
1186 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1187 | Fset_buffer_major_mode (buf); | |
1188 | } | |
89132f25 | 1189 | return buf; |
1ab256cb RM |
1190 | } |
1191 | \f | |
316784fb KH |
1192 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
1193 | 0, 1, "", | |
7ee72033 MB |
1194 | doc: /* Make BUFFER stop keeping undo information. |
1195 | No argument or nil as argument means do this for the current buffer. */) | |
1196 | (buffer) | |
ffd56f97 | 1197 | register Lisp_Object buffer; |
1ab256cb | 1198 | { |
ffd56f97 JB |
1199 | Lisp_Object real_buffer; |
1200 | ||
1201 | if (NILP (buffer)) | |
67180c6a | 1202 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
1203 | else |
1204 | { | |
1205 | real_buffer = Fget_buffer (buffer); | |
1206 | if (NILP (real_buffer)) | |
1207 | nsberror (buffer); | |
1208 | } | |
1209 | ||
1210 | XBUFFER (real_buffer)->undo_list = Qt; | |
1211 | ||
1ab256cb RM |
1212 | return Qnil; |
1213 | } | |
1214 | ||
1215 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
1216 | 0, 1, "", | |
7ee72033 MB |
1217 | doc: /* Start keeping undo information for buffer BUFFER. |
1218 | No argument or nil as argument means do this for the current buffer. */) | |
1219 | (buffer) | |
ffd56f97 | 1220 | register Lisp_Object buffer; |
1ab256cb | 1221 | { |
ffd56f97 | 1222 | Lisp_Object real_buffer; |
1ab256cb | 1223 | |
ffd56f97 | 1224 | if (NILP (buffer)) |
67180c6a | 1225 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1226 | else |
1227 | { | |
ffd56f97 JB |
1228 | real_buffer = Fget_buffer (buffer); |
1229 | if (NILP (real_buffer)) | |
1230 | nsberror (buffer); | |
1ab256cb RM |
1231 | } |
1232 | ||
ffd56f97 JB |
1233 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1234 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1235 | |
1236 | return Qnil; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1241 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1242 | The buffer being killed will be current while the hook is running.\n\ | |
1243 | See `kill-buffer'." | |
1244 | */ | |
1245 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1246 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1247 | The argument may be a buffer or may be the name of a buffer. |
1248 | An argument of nil means kill the current buffer. | |
1249 | ||
1250 | Value is t if the buffer is actually killed, nil if user says no. | |
1251 | ||
1252 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1253 | if not void, is a list of functions to be called, with no arguments, | |
1254 | before the buffer is actually killed. The buffer to be killed is current | |
1255 | when the hook functions are called. | |
1256 | ||
1257 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1258 | with SIGHUP. */) |
1259 | (buffer) | |
a25f13ae | 1260 | Lisp_Object buffer; |
1ab256cb RM |
1261 | { |
1262 | Lisp_Object buf; | |
1263 | register struct buffer *b; | |
1264 | register Lisp_Object tem; | |
1265 | register struct Lisp_Marker *m; | |
6af718a4 | 1266 | struct gcpro gcpro1; |
1ab256cb | 1267 | |
a25f13ae | 1268 | if (NILP (buffer)) |
1ab256cb RM |
1269 | buf = Fcurrent_buffer (); |
1270 | else | |
a25f13ae | 1271 | buf = Fget_buffer (buffer); |
265a9e55 | 1272 | if (NILP (buf)) |
a25f13ae | 1273 | nsberror (buffer); |
1ab256cb RM |
1274 | |
1275 | b = XBUFFER (buf); | |
1276 | ||
4a4a9db5 KH |
1277 | /* Avoid trouble for buffer already dead. */ |
1278 | if (NILP (b->name)) | |
1279 | return Qnil; | |
1280 | ||
1ab256cb | 1281 | /* Query if the buffer is still modified. */ |
265a9e55 | 1282 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1283 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1284 | { |
a25f13ae | 1285 | GCPRO1 (buf); |
1ab256cb | 1286 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
d5db4077 | 1287 | SDATA (b->name))); |
1ab256cb | 1288 | UNGCPRO; |
265a9e55 | 1289 | if (NILP (tem)) |
1ab256cb RM |
1290 | return Qnil; |
1291 | } | |
1292 | ||
dcdffbf6 | 1293 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1294 | { |
aed13378 | 1295 | int count = SPECPDL_INDEX (); |
dcdffbf6 | 1296 | Lisp_Object list; |
1ab256cb RM |
1297 | |
1298 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1299 | set_buffer_internal (b); | |
dcdffbf6 RS |
1300 | |
1301 | /* First run the query functions; if any query is answered no, | |
1302 | don't kill the buffer. */ | |
1303 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1304 | { | |
1305 | tem = call0 (Fcar (list)); | |
1306 | if (NILP (tem)) | |
1307 | return unbind_to (count, Qnil); | |
1308 | } | |
1309 | ||
1310 | /* Then run the hooks. */ | |
f1597a3a | 1311 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1312 | unbind_to (count, Qnil); |
1313 | } | |
1314 | ||
1315 | /* We have no more questions to ask. Verify that it is valid | |
1316 | to kill the buffer. This must be done after the questions | |
1317 | since anything can happen within do_yes_or_no_p. */ | |
1318 | ||
1319 | /* Don't kill the minibuffer now current. */ | |
1320 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1321 | return Qnil; | |
1322 | ||
265a9e55 | 1323 | if (NILP (b->name)) |
1ab256cb RM |
1324 | return Qnil; |
1325 | ||
336cd056 RS |
1326 | /* When we kill a base buffer, kill all its indirect buffers. |
1327 | We do it at this stage so nothing terrible happens if they | |
1328 | ask questions or their hooks get errors. */ | |
1329 | if (! b->base_buffer) | |
1330 | { | |
1331 | struct buffer *other; | |
1332 | ||
1333 | GCPRO1 (buf); | |
1334 | ||
1335 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1336 | /* all_buffers contains dead buffers too; |
1337 | don't re-kill them. */ | |
1338 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1339 | { |
1340 | Lisp_Object buf; | |
1341 | XSETBUFFER (buf, other); | |
1342 | Fkill_buffer (buf); | |
1343 | } | |
1344 | ||
1345 | UNGCPRO; | |
1346 | } | |
1347 | ||
1ab256cb RM |
1348 | /* Make this buffer not be current. |
1349 | In the process, notice if this is the sole visible buffer | |
1350 | and give up if so. */ | |
1351 | if (b == current_buffer) | |
1352 | { | |
773fbdb9 | 1353 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1354 | Fset_buffer (tem); |
1355 | if (b == current_buffer) | |
1356 | return Qnil; | |
1357 | } | |
1358 | ||
77270fac GM |
1359 | /* Notice if the buffer to kill is the sole visible buffer |
1360 | when we're currently in the mini-buffer, and give up if so. */ | |
1361 | XSETBUFFER (tem, current_buffer); | |
1362 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1363 | { | |
1364 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1365 | if (EQ (buf, tem)) |
1366 | return Qnil; | |
1367 | } | |
1368 | ||
1ab256cb RM |
1369 | /* Now there is no question: we can kill the buffer. */ |
1370 | ||
1371 | #ifdef CLASH_DETECTION | |
1372 | /* Unlock this buffer's file, if it is locked. */ | |
1373 | unlock_buffer (b); | |
1374 | #endif /* CLASH_DETECTION */ | |
1375 | ||
1ab256cb | 1376 | kill_buffer_processes (buf); |
1ab256cb RM |
1377 | |
1378 | tem = Vinhibit_quit; | |
1379 | Vinhibit_quit = Qt; | |
00550f94 | 1380 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1381 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1382 | frames_discard_buffer (buf); |
1ab256cb RM |
1383 | Vinhibit_quit = tem; |
1384 | ||
9cf712eb RS |
1385 | /* Delete any auto-save file, if we saved it in this session. |
1386 | But not if the buffer is modified. */ | |
a7a60ce9 | 1387 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1388 | && b->auto_save_modified != 0 |
9cf712eb RS |
1389 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
1390 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b)) | |
1ab256cb RM |
1391 | { |
1392 | Lisp_Object tem; | |
1393 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1394 | if (! NILP (tem)) |
cbb6a418 | 1395 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1396 | } |
1397 | ||
4a4a9db5 KH |
1398 | if (b->base_buffer) |
1399 | { | |
1400 | /* Unchain all markers that belong to this indirect buffer. | |
1401 | Don't unchain the markers that belong to the base buffer | |
1402 | or its other indirect buffers. */ | |
1403 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1404 | { | |
1405 | Lisp_Object next; | |
1406 | m = XMARKER (tem); | |
1407 | next = m->chain; | |
1408 | if (m->buffer == b) | |
1409 | unchain_marker (tem); | |
1410 | tem = next; | |
1411 | } | |
1412 | } | |
1413 | else | |
1ab256cb | 1414 | { |
4a4a9db5 | 1415 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1416 | and leave them pointing nowhere. */ |
4a4a9db5 | 1417 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1418 | { |
1419 | m = XMARKER (tem); | |
1420 | m->buffer = 0; | |
1421 | tem = m->chain; | |
1422 | m->chain = Qnil; | |
1423 | } | |
1424 | BUF_MARKERS (b) = Qnil; | |
336cd056 | 1425 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1426 | |
1427 | /* Perhaps we should explicitly free the interval tree here... */ | |
1428 | } | |
33f7013e | 1429 | |
2f3f993b RS |
1430 | /* Reset the local variables, so that this buffer's local values |
1431 | won't be protected from GC. They would be protected | |
1432 | if they happened to remain encached in their symbols. | |
1433 | This gets rid of them for certain. */ | |
1434 | swap_out_buffer_local_variables (b); | |
13de9290 | 1435 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1436 | |
1ab256cb | 1437 | b->name = Qnil; |
336cd056 | 1438 | |
9ac0d9e0 | 1439 | BLOCK_INPUT; |
336cd056 | 1440 | if (! b->base_buffer) |
b86af064 | 1441 | free_buffer_text (b); |
336cd056 | 1442 | |
28e969dd JB |
1443 | if (b->newline_cache) |
1444 | { | |
1445 | free_region_cache (b->newline_cache); | |
1446 | b->newline_cache = 0; | |
1447 | } | |
1448 | if (b->width_run_cache) | |
1449 | { | |
1450 | free_region_cache (b->width_run_cache); | |
1451 | b->width_run_cache = 0; | |
1452 | } | |
1453 | b->width_table = Qnil; | |
9ac0d9e0 | 1454 | UNBLOCK_INPUT; |
1ab256cb RM |
1455 | b->undo_list = Qnil; |
1456 | ||
1457 | return Qt; | |
1458 | } | |
1459 | \f | |
36a8c287 JB |
1460 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1461 | we do this each time BUF is selected visibly, the more recently | |
1462 | selected buffers are always closer to the front of the list. This | |
1463 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1464 | |
01136e9b | 1465 | void |
1ab256cb RM |
1466 | record_buffer (buf) |
1467 | Lisp_Object buf; | |
1468 | { | |
1469 | register Lisp_Object link, prev; | |
773fbdb9 | 1470 | Lisp_Object frame; |
9ba9623d | 1471 | frame = selected_frame; |
1ab256cb RM |
1472 | |
1473 | prev = Qnil; | |
7539e11f | 1474 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1475 | { |
7539e11f | 1476 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1477 | break; |
1478 | prev = link; | |
1479 | } | |
1480 | ||
36a8c287 JB |
1481 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1482 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1483 | |
265a9e55 | 1484 | if (NILP (prev)) |
7539e11f | 1485 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1486 | else |
f3fbd155 | 1487 | XSETCDR (prev, XCDR (XCDR (prev))); |
1ab256cb | 1488 | |
f3fbd155 | 1489 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1490 | Vbuffer_alist = link; |
7962a441 RS |
1491 | |
1492 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1493 | ||
1494 | prev = Qnil; | |
773fbdb9 | 1495 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1496 | link = XCDR (link)) |
7962a441 | 1497 | { |
7539e11f | 1498 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1499 | break; |
1500 | prev = link; | |
1501 | } | |
1502 | ||
1503 | /* Effectively do delq. */ | |
1504 | ||
1505 | if (CONSP (link)) | |
1506 | { | |
1507 | if (NILP (prev)) | |
773fbdb9 | 1508 | set_frame_buffer_list (frame, |
7539e11f | 1509 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1510 | else |
f3fbd155 | 1511 | XSETCDR (prev, XCDR (XCDR (prev))); |
7962a441 | 1512 | |
f3fbd155 | 1513 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1514 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1515 | } |
1516 | else | |
773fbdb9 | 1517 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1518 | } |
1519 | ||
a9ee7a59 | 1520 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1521 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1522 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1523 | according to `default-major-mode'. |
018ba359 | 1524 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1525 | the current buffer's major mode. */) |
1526 | (buffer) | |
a2428fa2 | 1527 | Lisp_Object buffer; |
a9ee7a59 KH |
1528 | { |
1529 | int count; | |
1530 | Lisp_Object function; | |
1531 | ||
71a0f2c6 | 1532 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1533 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1534 | function = find_symbol_value (intern ("initial-major-mode")); |
1535 | else | |
1536 | { | |
1537 | function = buffer_defaults.major_mode; | |
1538 | if (NILP (function) | |
1539 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1540 | function = current_buffer->major_mode; | |
1541 | } | |
1542 | ||
a9ee7a59 KH |
1543 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1544 | return Qnil; | |
1545 | ||
aed13378 | 1546 | count = SPECPDL_INDEX (); |
a9ee7a59 KH |
1547 | |
1548 | /* To select a nonfundamental mode, | |
1549 | select the buffer temporarily and then call the mode function. */ | |
1550 | ||
1551 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1552 | ||
a2428fa2 | 1553 | Fset_buffer (buffer); |
a9ee7a59 KH |
1554 | call0 (function); |
1555 | ||
1556 | return unbind_to (count, Qnil); | |
1557 | } | |
1558 | ||
2594e0fd RS |
1559 | /* If switching buffers in WINDOW would be an error, return |
1560 | a C string saying what the error would be. */ | |
1561 | ||
1562 | char * | |
1563 | no_switch_window (window) | |
1564 | Lisp_Object window; | |
1ab256cb | 1565 | { |
1ab256cb | 1566 | Lisp_Object tem; |
2594e0fd RS |
1567 | if (EQ (minibuf_window, window)) |
1568 | return "Cannot switch buffers in minibuffer window"; | |
1569 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1570 | if (EQ (tem, Qt)) |
2594e0fd RS |
1571 | return "Cannot switch buffers in a dedicated window"; |
1572 | return NULL; | |
1573 | } | |
1574 | ||
1575 | /* Switch to buffer BUFFER in the selected window. | |
1576 | If NORECORD is non-nil, don't call record_buffer. */ | |
1577 | ||
1578 | Lisp_Object | |
1579 | switch_to_buffer_1 (buffer, norecord) | |
1580 | Lisp_Object buffer, norecord; | |
1581 | { | |
1582 | register Lisp_Object buf; | |
1ab256cb | 1583 | |
a25f13ae | 1584 | if (NILP (buffer)) |
773fbdb9 | 1585 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1586 | else |
a9ee7a59 | 1587 | { |
a25f13ae | 1588 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1589 | if (NILP (buf)) |
1590 | { | |
a25f13ae | 1591 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1592 | Fset_buffer_major_mode (buf); |
1593 | } | |
1594 | } | |
1ab256cb | 1595 | Fset_buffer (buf); |
265a9e55 | 1596 | if (NILP (norecord)) |
1ab256cb RM |
1597 | record_buffer (buf); |
1598 | ||
1599 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1600 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1601 | : selected_window, | |
1ab256cb RM |
1602 | buf); |
1603 | ||
cd0c235a | 1604 | return buf; |
1ab256cb RM |
1605 | } |
1606 | ||
2594e0fd | 1607 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1608 | doc: /* Select buffer BUFFER in the current window. |
018ba359 PJ |
1609 | BUFFER may be a buffer or a buffer name. |
1610 | Optional second arg NORECORD non-nil means | |
1611 | do not put this buffer at the front of the list of recently selected ones. | |
1612 | ||
1613 | WARNING: This is NOT the way to work on another buffer temporarily | |
1614 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1615 | the window-buffer correspondences. */) |
1616 | (buffer, norecord) | |
2594e0fd RS |
1617 | Lisp_Object buffer, norecord; |
1618 | { | |
1619 | char *err; | |
1620 | ||
1621 | err = no_switch_window (selected_window); | |
1622 | if (err) error (err); | |
1623 | ||
1624 | return switch_to_buffer_1 (buffer, norecord); | |
1625 | } | |
1626 | ||
cd0c235a | 1627 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1628 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
018ba359 PJ |
1629 | If BUFFER is nil, then some other buffer is chosen. |
1630 | If `pop-up-windows' is non-nil, windows can be split to do this. | |
1631 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another | |
1632 | window even if BUFFER is already visible in the selected window. | |
1633 | This uses the function `display-buffer' as a subroutine; see the documentation | |
1634 | of `display-buffer' for additional customization information. | |
1635 | ||
1636 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1637 | do not put this buffer at the front of the list of recently selected ones. */) |
1638 | (buffer, other_window, norecord) | |
6d12711f | 1639 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1640 | { |
1641 | register Lisp_Object buf; | |
a25f13ae | 1642 | if (NILP (buffer)) |
773fbdb9 | 1643 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1644 | else |
7c2087ee | 1645 | { |
a25f13ae | 1646 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1647 | if (NILP (buf)) |
1648 | { | |
a25f13ae | 1649 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1650 | Fset_buffer_major_mode (buf); |
1651 | } | |
1652 | } | |
1ab256cb | 1653 | Fset_buffer (buf); |
6d12711f | 1654 | if (NILP (norecord)) |
c58dab63 | 1655 | /* This seems bogus since Fselect_window will call record_buffer anyway. */ |
6d12711f | 1656 | record_buffer (buf); |
6b17d756 | 1657 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1658 | return buf; |
1ab256cb RM |
1659 | } |
1660 | ||
1661 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1662 | doc: /* Return the current buffer as a Lisp object. */) |
1663 | () | |
1ab256cb RM |
1664 | { |
1665 | register Lisp_Object buf; | |
67180c6a | 1666 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1667 | return buf; |
1668 | } | |
1669 | \f | |
7ec44ec6 GM |
1670 | /* Set the current buffer to B. |
1671 | ||
1672 | We previously set windows_or_buffers_changed here to invalidate | |
1673 | global unchanged information in beg_unchanged and end_unchanged. | |
1674 | This is no longer necessary because we now compute unchanged | |
1675 | information on a buffer-basis. Every action affecting other | |
1676 | windows than the selected one requires a select_window at some | |
1677 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1678 | |
1679 | void | |
1680 | set_buffer_internal (b) | |
1681 | register struct buffer *b; | |
1682 | { | |
b5a225b4 | 1683 | if (current_buffer != b) |
7ec44ec6 | 1684 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1685 | } |
1686 | ||
1687 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1688 | This is used by redisplay. */ | |
1689 | ||
1690 | void | |
1691 | set_buffer_internal_1 (b) | |
1692 | register struct buffer *b; | |
1693 | { | |
1694 | register struct buffer *old_buf; | |
1695 | register Lisp_Object tail, valcontents; | |
1696 | Lisp_Object tem; | |
1697 | ||
b86af064 | 1698 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1699 | if (b->text->beg == NULL) |
b86af064 GM |
1700 | enlarge_buffer_text (b, 0); |
1701 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
684b01ee | 1702 | |
c7aa5005 KH |
1703 | if (current_buffer == b) |
1704 | return; | |
1705 | ||
1ab256cb RM |
1706 | old_buf = current_buffer; |
1707 | current_buffer = b; | |
1708 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1709 | ||
336cd056 RS |
1710 | if (old_buf) |
1711 | { | |
1712 | /* Put the undo list back in the base buffer, so that it appears | |
1713 | that an indirect buffer shares the undo list of its base. */ | |
1714 | if (old_buf->base_buffer) | |
1715 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1716 | ||
1717 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1718 | when it is not current, update them now. */ | |
1719 | if (! NILP (old_buf->pt_marker)) | |
1720 | { | |
1721 | Lisp_Object obuf; | |
1722 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1723 | set_marker_both (old_buf->pt_marker, obuf, |
1724 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1725 | } |
1726 | if (! NILP (old_buf->begv_marker)) | |
1727 | { | |
1728 | Lisp_Object obuf; | |
1729 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1730 | set_marker_both (old_buf->begv_marker, obuf, |
1731 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1732 | } |
1733 | if (! NILP (old_buf->zv_marker)) | |
1734 | { | |
1735 | Lisp_Object obuf; | |
1736 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1737 | set_marker_both (old_buf->zv_marker, obuf, |
1738 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1739 | } |
1740 | } | |
1741 | ||
1742 | /* Get the undo list from the base buffer, so that it appears | |
1743 | that an indirect buffer shares the undo list of its base. */ | |
1744 | if (b->base_buffer) | |
1745 | b->undo_list = b->base_buffer->undo_list; | |
1746 | ||
1747 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1748 | when it is not current, fetch them now. */ | |
1749 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1750 | { |
1751 | BUF_PT (b) = marker_position (b->pt_marker); | |
1752 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1753 | } | |
336cd056 | 1754 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1755 | { |
1756 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1757 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1758 | } | |
336cd056 | 1759 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1760 | { |
1761 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1762 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1763 | } | |
336cd056 | 1764 | |
1ab256cb RM |
1765 | /* Look down buffer's list of local Lisp variables |
1766 | to find and update any that forward into C variables. */ | |
1767 | ||
7539e11f | 1768 | for (tail = b->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1769 | { |
f5c1dd0d | 1770 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1771 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1772 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1773 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1774 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1775 | /* Just reference the variable |
1776 | to cause it to become set for this buffer. */ | |
7539e11f | 1777 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1778 | } |
1779 | ||
1780 | /* Do the same with any others that were local to the previous buffer */ | |
1781 | ||
1782 | if (old_buf) | |
7539e11f | 1783 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1784 | { |
f5c1dd0d | 1785 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1786 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1787 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1788 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1789 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1790 | /* Just reference the variable |
1791 | to cause it to become set for this buffer. */ | |
7539e11f | 1792 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1793 | } |
1794 | } | |
1795 | ||
336cd056 | 1796 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1797 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1798 | |
1799 | void | |
1800 | set_buffer_temp (b) | |
1801 | struct buffer *b; | |
1802 | { | |
1803 | register struct buffer *old_buf; | |
1804 | ||
1805 | if (current_buffer == b) | |
1806 | return; | |
1807 | ||
1808 | old_buf = current_buffer; | |
1809 | current_buffer = b; | |
1810 | ||
1811 | if (old_buf) | |
1812 | { | |
1813 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1814 | when it is not current, update them now. */ | |
1815 | if (! NILP (old_buf->pt_marker)) | |
1816 | { | |
1817 | Lisp_Object obuf; | |
1818 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1819 | set_marker_both (old_buf->pt_marker, obuf, |
1820 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1821 | } |
1822 | if (! NILP (old_buf->begv_marker)) | |
1823 | { | |
1824 | Lisp_Object obuf; | |
1825 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1826 | set_marker_both (old_buf->begv_marker, obuf, |
1827 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1828 | } |
1829 | if (! NILP (old_buf->zv_marker)) | |
1830 | { | |
1831 | Lisp_Object obuf; | |
1832 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1833 | set_marker_both (old_buf->zv_marker, obuf, |
1834 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1835 | } |
1836 | } | |
1837 | ||
1838 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1839 | when it is not current, fetch them now. */ | |
1840 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1841 | { |
1842 | BUF_PT (b) = marker_position (b->pt_marker); | |
1843 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1844 | } | |
336cd056 | 1845 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1846 | { |
1847 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1848 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1849 | } | |
336cd056 | 1850 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1851 | { |
1852 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1853 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1854 | } | |
336cd056 RS |
1855 | } |
1856 | ||
1ab256cb | 1857 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1858 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1859 | BUFFER may be a buffer or the name of an existing buffer. |
1860 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1861 | This function does not display the buffer, so its effect ends | |
1862 | when the current command terminates. | |
7ee72033 MB |
1863 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1864 | (buffer) | |
a25f13ae | 1865 | register Lisp_Object buffer; |
1ab256cb | 1866 | { |
a25f13ae KH |
1867 | register Lisp_Object buf; |
1868 | buf = Fget_buffer (buffer); | |
1869 | if (NILP (buf)) | |
1870 | nsberror (buffer); | |
1871 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1872 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1873 | set_buffer_internal (XBUFFER (buf)); |
1874 | return buf; | |
1ab256cb | 1875 | } |
d0628b06 RS |
1876 | |
1877 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1878 | ||
1879 | Lisp_Object | |
1880 | set_buffer_if_live (buffer) | |
1881 | Lisp_Object buffer; | |
1882 | { | |
1883 | if (! NILP (XBUFFER (buffer)->name)) | |
1884 | Fset_buffer (buffer); | |
1885 | return Qnil; | |
1886 | } | |
1ab256cb RM |
1887 | \f |
1888 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1889 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1890 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1891 | () | |
1ab256cb | 1892 | { |
a96b68f1 RS |
1893 | if (!NILP (current_buffer->read_only) |
1894 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1895 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1896 | return Qnil; | |
1897 | } | |
1898 | ||
1899 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 1900 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
1901 | There it is the least likely candidate for `other-buffer' to return; |
1902 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
1903 | If BUFFER is nil or omitted, bury the current buffer. | |
1904 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
1905 | selected window if it is displayed there. */) |
1906 | (buffer) | |
a2428fa2 | 1907 | register Lisp_Object buffer; |
1ab256cb | 1908 | { |
b271272a | 1909 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1910 | if (NILP (buffer)) |
a5611885 | 1911 | { |
c58dab63 | 1912 | Lisp_Object tem; |
a2428fa2 | 1913 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1914 | |
c58dab63 | 1915 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1916 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1917 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1918 | { |
1919 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1920 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1921 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1922 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1923 | else | |
1924 | Fdelete_window (selected_window); | |
1925 | } | |
a5611885 | 1926 | } |
1ab256cb RM |
1927 | else |
1928 | { | |
1929 | Lisp_Object buf1; | |
1930 | ||
a2428fa2 | 1931 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1932 | if (NILP (buf1)) |
a2428fa2 EN |
1933 | nsberror (buffer); |
1934 | buffer = buf1; | |
b271272a JB |
1935 | } |
1936 | ||
a1a8b28e GM |
1937 | /* Move buffer to the end of the buffer list. Do nothing if the |
1938 | buffer is killed. */ | |
1939 | if (!NILP (XBUFFER (buffer)->name)) | |
1940 | { | |
1941 | Lisp_Object aelt, link; | |
b271272a | 1942 | |
a1a8b28e GM |
1943 | aelt = Frassq (buffer, Vbuffer_alist); |
1944 | link = Fmemq (aelt, Vbuffer_alist); | |
1945 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 1946 | XSETCDR (link, Qnil); |
a1a8b28e | 1947 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 1948 | |
6c488ddb RS |
1949 | /* Removing BUFFER from frame-specific lists |
1950 | has the effect of putting BUFFER at the end | |
1951 | of the combined list in each frame. */ | |
1952 | frames_discard_buffer (buffer); | |
a1a8b28e | 1953 | } |
dec989eb | 1954 | |
1ab256cb RM |
1955 | return Qnil; |
1956 | } | |
1957 | \f | |
c922bc55 | 1958 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1959 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1960 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
1961 | so the buffer is truly empty after this. */) |
1962 | () | |
1ab256cb RM |
1963 | { |
1964 | Fwiden (); | |
c0d9a0c3 GM |
1965 | |
1966 | del_range (BEG, Z); | |
c280bc6a | 1967 | |
1ab256cb RM |
1968 | current_buffer->last_window_start = 1; |
1969 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1970 | if future size is less than past size. Use of erase-buffer | |
1971 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1972 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1973 | return Qnil; |
1974 | } | |
1975 | ||
01136e9b | 1976 | void |
1ab256cb RM |
1977 | validate_region (b, e) |
1978 | register Lisp_Object *b, *e; | |
1979 | { | |
b7826503 PJ |
1980 | CHECK_NUMBER_COERCE_MARKER (*b); |
1981 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1982 | |
1983 | if (XINT (*b) > XINT (*e)) | |
1984 | { | |
03192067 KH |
1985 | Lisp_Object tem; |
1986 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1987 | } |
1988 | ||
1989 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1990 | && XINT (*e) <= ZV)) | |
1991 | args_out_of_range (*b, *e); | |
1992 | } | |
1993 | \f | |
b05525fa RS |
1994 | /* Advance BYTE_POS up to a character boundary |
1995 | and return the adjusted position. */ | |
1996 | ||
1997 | static int | |
1998 | advance_to_char_boundary (byte_pos) | |
1999 | int byte_pos; | |
2000 | { | |
f8449323 | 2001 | int c; |
b05525fa | 2002 | |
f8449323 RS |
2003 | if (byte_pos == BEG) |
2004 | /* Beginning of buffer is always a character boundary. */ | |
2005 | return 1; | |
2006 | ||
2007 | c = FETCH_BYTE (byte_pos); | |
2008 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2009 | { |
1be6387d | 2010 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2011 | multibyte sequence. */ |
a9bcded1 KH |
2012 | int orig_byte_pos = byte_pos; |
2013 | ||
2014 | do | |
2015 | { | |
2016 | byte_pos--; | |
2017 | c = FETCH_BYTE (byte_pos); | |
2018 | } | |
2019 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2020 | INC_POS (byte_pos); |
a9bcded1 KH |
2021 | if (byte_pos < orig_byte_pos) |
2022 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2023 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2024 | surely advance to the correct character boundary. If C is | |
2025 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2026 | } |
2027 | ||
20773569 | 2028 | return byte_pos; |
b05525fa RS |
2029 | } |
2030 | ||
3ac81adb RS |
2031 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2032 | 1, 1, 0, | |
7ee72033 | 2033 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2034 | If FLAG is t, this makes the buffer a multibyte buffer. |
2035 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2036 | The buffer contents remain unchanged as a sequence of bytes | |
7ee72033 MB |
2037 | but the contents viewed as characters do change. */) |
2038 | (flag) | |
3ac81adb RS |
2039 | Lisp_Object flag; |
2040 | { | |
2041 | Lisp_Object tail, markers; | |
abc9d959 | 2042 | struct buffer *other; |
a9bcded1 KH |
2043 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
2044 | int begv = BEGV, zv = ZV; | |
2045 | int narrowed = (BEG != begv || Z != zv); | |
ed00559d | 2046 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 2047 | |
6e553d5e RS |
2048 | if (current_buffer->base_buffer) |
2049 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2050 | ||
70e77119 AS |
2051 | /* Do nothing if nothing actually changes. */ |
2052 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2053 | return flag; | |
2054 | ||
b05525fa RS |
2055 | /* It would be better to update the list, |
2056 | but this is good enough for now. */ | |
a9bcded1 KH |
2057 | if (undo_enabled_p) |
2058 | current_buffer->undo_list = Qt; | |
b05525fa | 2059 | |
3ac81adb RS |
2060 | /* If the cached position is for this buffer, clear it out. */ |
2061 | clear_charpos_cache (current_buffer); | |
2062 | ||
a9bcded1 KH |
2063 | if (narrowed) |
2064 | Fwiden (); | |
2065 | ||
3ac81adb RS |
2066 | if (NILP (flag)) |
2067 | { | |
a9bcded1 KH |
2068 | int pos, stop; |
2069 | unsigned char *p; | |
2070 | ||
3ac81adb RS |
2071 | /* Do this first, so it can use CHAR_TO_BYTE |
2072 | to calculate the old correspondences. */ | |
2073 | set_intervals_multibyte (0); | |
2074 | ||
2075 | current_buffer->enable_multibyte_characters = Qnil; | |
2076 | ||
2077 | Z = Z_BYTE; | |
2078 | BEGV = BEGV_BYTE; | |
2079 | ZV = ZV_BYTE; | |
2080 | GPT = GPT_BYTE; | |
2081 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2082 | ||
2083 | tail = BUF_MARKERS (current_buffer); | |
8801a864 | 2084 | while (! NILP (tail)) |
3ac81adb RS |
2085 | { |
2086 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
2087 | tail = XMARKER (tail)->chain; | |
2088 | } | |
a9bcded1 KH |
2089 | |
2090 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2091 | pos = BEG; | |
2092 | stop = GPT; | |
2093 | p = BEG_ADDR; | |
2094 | while (1) | |
2095 | { | |
2096 | int c, bytes; | |
2097 | ||
2098 | if (pos == stop) | |
2099 | { | |
2100 | if (pos == Z) | |
2101 | break; | |
2102 | p = GAP_END_ADDR; | |
2103 | stop = Z; | |
2104 | } | |
2105 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2106 | p += bytes, pos += bytes; | |
2107 | else | |
2108 | { | |
2109 | c = STRING_CHAR (p, stop - pos); | |
2110 | /* Delete all bytes for this 8-bit character but the | |
2111 | last one, and change the last one to the charcter | |
2112 | code. */ | |
2113 | bytes--; | |
2114 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2115 | p = GAP_END_ADDR; | |
2116 | *p++ = c; | |
2117 | pos++; | |
2118 | if (begv > pos) | |
2119 | begv -= bytes; | |
2120 | if (zv > pos) | |
2121 | zv -= bytes; | |
2122 | stop = Z; | |
2123 | } | |
2124 | } | |
2125 | if (narrowed) | |
2126 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2127 | } |
2128 | else | |
2129 | { | |
a9bcded1 KH |
2130 | int pt = PT; |
2131 | int pos, stop; | |
2132 | unsigned char *p; | |
2133 | ||
673c57d2 | 2134 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2135 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2136 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2137 | |
2138 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2139 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2140 | { | |
2141 | unsigned char *p = GPT_ADDR - 1; | |
2142 | ||
2143 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2144 | if (BASE_LEADING_CODE_P (*p)) | |
2145 | { | |
2146 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2147 | ||
2148 | move_gap_both (new_gpt, new_gpt); | |
2149 | } | |
2150 | } | |
2151 | ||
a9bcded1 KH |
2152 | /* Make the buffer contents valid as multibyte by converting |
2153 | 8-bit characters to multibyte form. */ | |
2154 | pos = BEG; | |
2155 | stop = GPT; | |
2156 | p = BEG_ADDR; | |
2157 | while (1) | |
2158 | { | |
2159 | int bytes; | |
2160 | ||
2161 | if (pos == stop) | |
2162 | { | |
2163 | if (pos == Z) | |
2164 | break; | |
2165 | p = GAP_END_ADDR; | |
2166 | stop = Z; | |
2167 | } | |
2168 | ||
2169 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) | |
2170 | p += bytes, pos += bytes; | |
2171 | else | |
2172 | { | |
2173 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2174 | ||
2175 | bytes = CHAR_STRING (*p, tmp); | |
2176 | *p = tmp[0]; | |
2177 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2178 | bytes--; | |
2179 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2180 | /* Now the gap is after the just inserted data. */ | |
2181 | pos = GPT; | |
2182 | p = GAP_END_ADDR; | |
2183 | if (pos <= begv) | |
2184 | begv += bytes; | |
2185 | if (pos <= zv) | |
2186 | zv += bytes; | |
2187 | if (pos <= pt) | |
2188 | pt += bytes; | |
2189 | stop = Z; | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | if (pt != PT) | |
2194 | TEMP_SET_PT (pt); | |
2195 | ||
2196 | if (narrowed) | |
2197 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2198 | ||
3ac81adb RS |
2199 | /* Do this first, so that chars_in_text asks the right question. |
2200 | set_intervals_multibyte needs it too. */ | |
2201 | current_buffer->enable_multibyte_characters = Qt; | |
2202 | ||
b05525fa | 2203 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2204 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2205 | |
673c57d2 | 2206 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2207 | |
2208 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2209 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2210 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2211 | else |
2212 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2213 | |
2214 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2215 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2216 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2217 | else |
2218 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2219 | |
2220 | { | |
2221 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2222 | int pt; | |
2223 | ||
2224 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2225 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2226 | else |
2227 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2228 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2229 | } | |
3ac81adb RS |
2230 | |
2231 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2232 | |
2233 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2234 | getting confused by the markers that have not yet been updated. | |
2235 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
2236 | BUF_MARKERS (current_buffer) = Qnil; |
2237 | ||
8801a864 | 2238 | while (! NILP (tail)) |
3ac81adb | 2239 | { |
b05525fa RS |
2240 | XMARKER (tail)->bytepos |
2241 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 2242 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 2243 | |
3ac81adb RS |
2244 | tail = XMARKER (tail)->chain; |
2245 | } | |
b69f9797 RS |
2246 | |
2247 | /* Make sure no markers were put on the chain | |
2248 | while the chain value was incorrect. */ | |
2249 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
2250 | abort (); | |
2251 | ||
3ac81adb RS |
2252 | BUF_MARKERS (current_buffer) = markers; |
2253 | ||
2254 | /* Do this last, so it can calculate the new correspondences | |
2255 | between chars and bytes. */ | |
2256 | set_intervals_multibyte (1); | |
2257 | } | |
2258 | ||
a9bcded1 KH |
2259 | if (undo_enabled_p) |
2260 | current_buffer->undo_list = Qnil; | |
2261 | ||
724b203f GM |
2262 | /* Changing the multibyteness of a buffer means that all windows |
2263 | showing that buffer must be updated thoroughly. */ | |
2264 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2265 | ++windows_or_buffers_changed; | |
2266 | ||
abc9d959 RS |
2267 | /* Copy this buffer's new multibyte status |
2268 | into all of its indirect buffers. */ | |
2269 | for (other = all_buffers; other; other = other->next) | |
2270 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2271 | { |
2272 | other->enable_multibyte_characters | |
2273 | = current_buffer->enable_multibyte_characters; | |
2274 | other->prevent_redisplay_optimizations_p = 1; | |
2275 | } | |
abc9d959 | 2276 | |
ed00559d KH |
2277 | /* Restore the modifiedness of the buffer. */ |
2278 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2279 | Fset_buffer_modified_p (Qnil); | |
2280 | ||
3ac81adb RS |
2281 | return flag; |
2282 | } | |
2283 | \f | |
1ab256cb | 2284 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2285 | 0, 0, 0, |
7ee72033 | 2286 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2287 | Most local variable bindings are eliminated so that the default values |
2288 | become effective once more. Also, the syntax table is set from | |
2289 | `standard-syntax-table', the local keymap is set to nil, | |
2290 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2291 | This function also forces redisplay of the mode line. | |
2292 | ||
2293 | Every function to select a new major mode starts by | |
2294 | calling this function. | |
2295 | ||
2296 | As a special exception, local variables whose names have | |
2297 | a non-nil `permanent-local' property are not eliminated by this function. | |
2298 | ||
2299 | The first thing this function does is run | |
7ee72033 MB |
2300 | the normal hook `change-major-mode-hook'. */) |
2301 | () | |
1ab256cb RM |
2302 | { |
2303 | register Lisp_Object alist, sym, tem; | |
2304 | Lisp_Object oalist; | |
7410477a | 2305 | |
fd186f07 RS |
2306 | if (!NILP (Vrun_hooks)) |
2307 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2308 | oalist = current_buffer->local_var_alist; |
2309 | ||
2f3f993b RS |
2310 | /* Make sure none of the bindings in oalist |
2311 | remain swapped in, in their symbols. */ | |
1ab256cb | 2312 | |
2f3f993b | 2313 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2314 | |
2315 | /* Actually eliminate all local bindings of this buffer. */ | |
2316 | ||
13de9290 | 2317 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2318 | |
1ab256cb RM |
2319 | /* Any which are supposed to be permanent, |
2320 | make local again, with the same values they had. */ | |
2321 | ||
7539e11f | 2322 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2323 | { |
7539e11f | 2324 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2325 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2326 | if (! NILP (tem)) |
01050cb5 RM |
2327 | { |
2328 | Fmake_local_variable (sym); | |
7539e11f | 2329 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2330 | } |
1ab256cb RM |
2331 | } |
2332 | ||
2333 | /* Force mode-line redisplay. Useful here because all major mode | |
2334 | commands call this function. */ | |
2335 | update_mode_lines++; | |
2336 | ||
2337 | return Qnil; | |
2338 | } | |
2f3f993b RS |
2339 | |
2340 | /* Make sure no local variables remain set up with buffer B | |
2341 | for their current values. */ | |
2342 | ||
2343 | static void | |
2344 | swap_out_buffer_local_variables (b) | |
2345 | struct buffer *b; | |
2346 | { | |
2347 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2348 | ||
2349 | XSETBUFFER (buffer, b); | |
2350 | oalist = b->local_var_alist; | |
2351 | ||
7539e11f | 2352 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2353 | { |
7539e11f | 2354 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2355 | |
2356 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2357 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2358 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2359 | { |
2360 | /* Symbol is set up for this buffer's old local value. | |
2361 | Set it up for the current buffer with the default value. */ | |
2362 | ||
f5c1dd0d | 2363 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2364 | /* Store the symbol's current value into the alist entry |
2365 | it is currently set up for. This is so that, if the | |
2366 | local is marked permanent, and we make it local again | |
2367 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2368 | XSETCDR (XCAR (tem), |
2369 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2370 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2371 | XSETCAR (tem, tem); |
2f3f993b | 2372 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2373 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2374 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2375 | store_symval_forwarding (sym, |
f5c1dd0d | 2376 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2377 | XCDR (tem), NULL); |
2f3f993b RS |
2378 | } |
2379 | } | |
2380 | } | |
1ab256cb | 2381 | \f |
2eec3b4e RS |
2382 | /* Find all the overlays in the current buffer that contain position POS. |
2383 | Return the number found, and store them in a vector in *VEC_PTR. | |
2384 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
2385 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2386 | or ZV if there are no more overlays. | |
bbbe9545 | 2387 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2388 | or where an overlay starts which ends at or after POS; |
2389 | or BEGV if there are no such overlays. | |
239c932b | 2390 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2391 | |
2392 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2393 | when this function is called. |
2394 | ||
2395 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2396 | If EXTEND is zero, we never extend the vector, | |
2397 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2398 | But we still return the total number of overlays. |
2399 | ||
2400 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2401 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2402 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2403 | |
2404 | int | |
ac869cf7 | 2405 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
2eec3b4e | 2406 | int pos; |
61d54cd5 | 2407 | int extend; |
2eec3b4e RS |
2408 | Lisp_Object **vec_ptr; |
2409 | int *len_ptr; | |
2410 | int *next_ptr; | |
239c932b | 2411 | int *prev_ptr; |
ac869cf7 | 2412 | int change_req; |
1ab256cb | 2413 | { |
6af718a4 | 2414 | Lisp_Object tail, overlay, start, end; |
2eec3b4e RS |
2415 | int idx = 0; |
2416 | int len = *len_ptr; | |
2417 | Lisp_Object *vec = *vec_ptr; | |
2418 | int next = ZV; | |
239c932b | 2419 | int prev = BEGV; |
61d54cd5 RS |
2420 | int inhibit_storing = 0; |
2421 | ||
2eec3b4e | 2422 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2423 | GC_CONSP (tail); |
7539e11f | 2424 | tail = XCDR (tail)) |
2eec3b4e | 2425 | { |
239c932b | 2426 | int startpos, endpos; |
52f8ec73 | 2427 | |
7539e11f | 2428 | overlay = XCAR (tail); |
1ab256cb | 2429 | |
2eec3b4e RS |
2430 | start = OVERLAY_START (overlay); |
2431 | end = OVERLAY_END (overlay); | |
239c932b RS |
2432 | endpos = OVERLAY_POSITION (end); |
2433 | if (endpos < pos) | |
2434 | { | |
2435 | if (prev < endpos) | |
2436 | prev = endpos; | |
2437 | break; | |
2438 | } | |
413e06a4 RS |
2439 | startpos = OVERLAY_POSITION (start); |
2440 | /* This one ends at or after POS | |
daa1c109 | 2441 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2442 | if (prev < startpos && startpos < pos) |
2443 | prev = startpos; | |
239c932b RS |
2444 | if (endpos == pos) |
2445 | continue; | |
2eec3b4e RS |
2446 | if (startpos <= pos) |
2447 | { | |
2448 | if (idx == len) | |
2449 | { | |
61d54cd5 RS |
2450 | /* The supplied vector is full. |
2451 | Either make it bigger, or don't store any more in it. */ | |
2452 | if (extend) | |
2453 | { | |
0552666b GM |
2454 | /* Make it work with an initial len == 0. */ |
2455 | len *= 2; | |
2456 | if (len == 0) | |
2457 | len = 4; | |
2458 | *len_ptr = len; | |
61d54cd5 RS |
2459 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2460 | *vec_ptr = vec; | |
2461 | } | |
2462 | else | |
2463 | inhibit_storing = 1; | |
2eec3b4e | 2464 | } |
61d54cd5 RS |
2465 | |
2466 | if (!inhibit_storing) | |
2467 | vec[idx] = overlay; | |
2468 | /* Keep counting overlays even if we can't return them all. */ | |
2469 | idx++; | |
2eec3b4e RS |
2470 | } |
2471 | else if (startpos < next) | |
2472 | next = startpos; | |
2473 | } | |
2474 | ||
2475 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2476 | GC_CONSP (tail); |
7539e11f | 2477 | tail = XCDR (tail)) |
1ab256cb | 2478 | { |
239c932b | 2479 | int startpos, endpos; |
52f8ec73 | 2480 | |
7539e11f | 2481 | overlay = XCAR (tail); |
2eec3b4e RS |
2482 | |
2483 | start = OVERLAY_START (overlay); | |
2484 | end = OVERLAY_END (overlay); | |
2485 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2486 | if (pos < startpos) |
2eec3b4e RS |
2487 | { |
2488 | if (startpos < next) | |
2489 | next = startpos; | |
2490 | break; | |
2491 | } | |
239c932b RS |
2492 | endpos = OVERLAY_POSITION (end); |
2493 | if (pos < endpos) | |
2eec3b4e RS |
2494 | { |
2495 | if (idx == len) | |
2496 | { | |
61d54cd5 RS |
2497 | if (extend) |
2498 | { | |
2499 | *len_ptr = len *= 2; | |
0552666b GM |
2500 | if (len == 0) |
2501 | len = *len_ptr = 4; | |
61d54cd5 RS |
2502 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2503 | *vec_ptr = vec; | |
2504 | } | |
2505 | else | |
2506 | inhibit_storing = 1; | |
2eec3b4e | 2507 | } |
61d54cd5 RS |
2508 | |
2509 | if (!inhibit_storing) | |
2510 | vec[idx] = overlay; | |
2511 | idx++; | |
413e06a4 RS |
2512 | |
2513 | if (startpos < pos && startpos > prev) | |
2514 | prev = startpos; | |
2eec3b4e | 2515 | } |
239c932b RS |
2516 | else if (endpos < pos && endpos > prev) |
2517 | prev = endpos; | |
1d5f4c1d MB |
2518 | else if (endpos == pos && startpos > prev |
2519 | && (!change_req || startpos < pos)) | |
413e06a4 | 2520 | prev = startpos; |
1ab256cb RM |
2521 | } |
2522 | ||
239c932b RS |
2523 | if (next_ptr) |
2524 | *next_ptr = next; | |
2525 | if (prev_ptr) | |
2526 | *prev_ptr = prev; | |
2eec3b4e RS |
2527 | return idx; |
2528 | } | |
74514898 RS |
2529 | \f |
2530 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2531 | or are empty at BEG. |
2532 | ||
74514898 RS |
2533 | Return the number found, and store them in a vector in *VEC_PTR. |
2534 | Store in *LEN_PTR the size allocated for the vector. | |
2535 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2536 | or ZV if there are no more overlays. | |
2537 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2538 | or BEGV if there are no previous overlays. | |
2539 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2540 | ||
2541 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2542 | when this function is called. | |
2543 | ||
2544 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2545 | If EXTEND is zero, we never extend the vector, | |
2546 | and we store only as many overlays as will fit. | |
2547 | But we still return the total number of overlays. */ | |
2548 | ||
2549 | int | |
2550 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2551 | int beg, end; | |
2552 | int extend; | |
2553 | Lisp_Object **vec_ptr; | |
2554 | int *len_ptr; | |
2555 | int *next_ptr; | |
2556 | int *prev_ptr; | |
2557 | { | |
6af718a4 | 2558 | Lisp_Object tail, overlay, ostart, oend; |
74514898 RS |
2559 | int idx = 0; |
2560 | int len = *len_ptr; | |
2561 | Lisp_Object *vec = *vec_ptr; | |
2562 | int next = ZV; | |
2563 | int prev = BEGV; | |
2564 | int inhibit_storing = 0; | |
2565 | ||
2566 | for (tail = current_buffer->overlays_before; | |
2567 | GC_CONSP (tail); | |
7539e11f | 2568 | tail = XCDR (tail)) |
74514898 RS |
2569 | { |
2570 | int startpos, endpos; | |
2571 | ||
7539e11f | 2572 | overlay = XCAR (tail); |
74514898 RS |
2573 | |
2574 | ostart = OVERLAY_START (overlay); | |
2575 | oend = OVERLAY_END (overlay); | |
2576 | endpos = OVERLAY_POSITION (oend); | |
2577 | if (endpos < beg) | |
2578 | { | |
2579 | if (prev < endpos) | |
2580 | prev = endpos; | |
2581 | break; | |
2582 | } | |
2583 | startpos = OVERLAY_POSITION (ostart); | |
2584 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2585 | or is empty at the start of the range. */ |
74514898 | 2586 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2587 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2588 | { |
2589 | if (idx == len) | |
2590 | { | |
2591 | /* The supplied vector is full. | |
2592 | Either make it bigger, or don't store any more in it. */ | |
2593 | if (extend) | |
2594 | { | |
2595 | *len_ptr = len *= 2; | |
2596 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2597 | *vec_ptr = vec; | |
2598 | } | |
2599 | else | |
2600 | inhibit_storing = 1; | |
2601 | } | |
2602 | ||
2603 | if (!inhibit_storing) | |
2604 | vec[idx] = overlay; | |
2605 | /* Keep counting overlays even if we can't return them all. */ | |
2606 | idx++; | |
2607 | } | |
2608 | else if (startpos < next) | |
2609 | next = startpos; | |
2610 | } | |
2611 | ||
2612 | for (tail = current_buffer->overlays_after; | |
2613 | GC_CONSP (tail); | |
7539e11f | 2614 | tail = XCDR (tail)) |
74514898 RS |
2615 | { |
2616 | int startpos, endpos; | |
2617 | ||
7539e11f | 2618 | overlay = XCAR (tail); |
74514898 RS |
2619 | |
2620 | ostart = OVERLAY_START (overlay); | |
2621 | oend = OVERLAY_END (overlay); | |
2622 | startpos = OVERLAY_POSITION (ostart); | |
2623 | if (end < startpos) | |
2624 | { | |
2625 | if (startpos < next) | |
2626 | next = startpos; | |
2627 | break; | |
2628 | } | |
2629 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2630 | /* Count an interval if it either overlaps the range |
2631 | or is empty at the start of the range. */ | |
74514898 | 2632 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2633 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2634 | { |
2635 | if (idx == len) | |
2636 | { | |
2637 | if (extend) | |
2638 | { | |
2639 | *len_ptr = len *= 2; | |
2640 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2641 | *vec_ptr = vec; | |
2642 | } | |
2643 | else | |
2644 | inhibit_storing = 1; | |
2645 | } | |
2646 | ||
2647 | if (!inhibit_storing) | |
2648 | vec[idx] = overlay; | |
2649 | idx++; | |
2650 | } | |
2651 | else if (endpos < beg && endpos > prev) | |
2652 | prev = endpos; | |
2653 | } | |
fc04fa47 | 2654 | |
74514898 RS |
2655 | if (next_ptr) |
2656 | *next_ptr = next; | |
2657 | if (prev_ptr) | |
2658 | *prev_ptr = prev; | |
2659 | return idx; | |
2660 | } | |
09a22085 GM |
2661 | |
2662 | ||
2663 | /* Return non-zero if there exists an overlay with a non-nil | |
2664 | `mouse-face' property overlapping OVERLAY. */ | |
2665 | ||
2666 | int | |
2667 | mouse_face_overlay_overlaps (overlay) | |
2668 | Lisp_Object overlay; | |
2669 | { | |
2670 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2671 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2672 | int n, i, size; |
09a22085 GM |
2673 | Lisp_Object *v, tem; |
2674 | ||
bfd8410f GM |
2675 | size = 10; |
2676 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2677 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2678 | if (n > size) | |
09a22085 | 2679 | { |
09a22085 GM |
2680 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2681 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2682 | } | |
2683 | ||
2684 | for (i = 0; i < n; ++i) | |
2685 | if (!EQ (v[i], overlay) | |
2686 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2687 | !NILP (tem))) | |
2688 | break; | |
2689 | ||
2690 | return i < n; | |
2691 | } | |
2692 | ||
2693 | ||
74514898 | 2694 | \f |
fc04fa47 KH |
2695 | /* Fast function to just test if we're at an overlay boundary. */ |
2696 | int | |
2697 | overlay_touches_p (pos) | |
2698 | int pos; | |
2699 | { | |
2700 | Lisp_Object tail, overlay; | |
2701 | ||
2702 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
7539e11f | 2703 | tail = XCDR (tail)) |
fc04fa47 KH |
2704 | { |
2705 | int endpos; | |
2706 | ||
7539e11f | 2707 | overlay = XCAR (tail); |
fc04fa47 KH |
2708 | if (!GC_OVERLAYP (overlay)) |
2709 | abort (); | |
2710 | ||
2711 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2712 | if (endpos < pos) | |
2713 | break; | |
2714 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2715 | return 1; | |
2716 | } | |
2717 | ||
2718 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
7539e11f | 2719 | tail = XCDR (tail)) |
fc04fa47 KH |
2720 | { |
2721 | int startpos; | |
2722 | ||
7539e11f | 2723 | overlay = XCAR (tail); |
fc04fa47 KH |
2724 | if (!GC_OVERLAYP (overlay)) |
2725 | abort (); | |
2726 | ||
2727 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2728 | if (pos < startpos) | |
2729 | break; | |
2730 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2731 | return 1; | |
2732 | } | |
2733 | return 0; | |
2734 | } | |
2eec3b4e | 2735 | \f |
5985d248 KH |
2736 | struct sortvec |
2737 | { | |
2738 | Lisp_Object overlay; | |
2739 | int beg, end; | |
2740 | int priority; | |
2741 | }; | |
2742 | ||
2743 | static int | |
dfcf069d AS |
2744 | compare_overlays (v1, v2) |
2745 | const void *v1, *v2; | |
5985d248 | 2746 | { |
dfcf069d AS |
2747 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2748 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2749 | if (s1->priority != s2->priority) |
2750 | return s1->priority - s2->priority; | |
2751 | if (s1->beg != s2->beg) | |
2752 | return s1->beg - s2->beg; | |
2753 | if (s1->end != s2->end) | |
2754 | return s2->end - s1->end; | |
2755 | return 0; | |
2756 | } | |
2757 | ||
2758 | /* Sort an array of overlays by priority. The array is modified in place. | |
2759 | The return value is the new size; this may be smaller than the original | |
2760 | size if some of the overlays were invalid or were window-specific. */ | |
2761 | int | |
2762 | sort_overlays (overlay_vec, noverlays, w) | |
2763 | Lisp_Object *overlay_vec; | |
2764 | int noverlays; | |
2765 | struct window *w; | |
2766 | { | |
2767 | int i, j; | |
2768 | struct sortvec *sortvec; | |
2769 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2770 | ||
2771 | /* Put the valid and relevant overlays into sortvec. */ | |
2772 | ||
2773 | for (i = 0, j = 0; i < noverlays; i++) | |
2774 | { | |
0fa767e7 | 2775 | Lisp_Object tem; |
c99fc30f | 2776 | Lisp_Object overlay; |
5985d248 | 2777 | |
c99fc30f | 2778 | overlay = overlay_vec[i]; |
5985d248 KH |
2779 | if (OVERLAY_VALID (overlay) |
2780 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2781 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2782 | { | |
0fa767e7 KH |
2783 | /* If we're interested in a specific window, then ignore |
2784 | overlays that are limited to some other window. */ | |
2785 | if (w) | |
5985d248 | 2786 | { |
0fa767e7 KH |
2787 | Lisp_Object window; |
2788 | ||
2789 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2790 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2791 | continue; |
5985d248 | 2792 | } |
0fa767e7 KH |
2793 | |
2794 | /* This overlay is good and counts: put it into sortvec. */ | |
2795 | sortvec[j].overlay = overlay; | |
2796 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2797 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2798 | tem = Foverlay_get (overlay, Qpriority); | |
2799 | if (INTEGERP (tem)) | |
2800 | sortvec[j].priority = XINT (tem); | |
2801 | else | |
2802 | sortvec[j].priority = 0; | |
2803 | j++; | |
5985d248 KH |
2804 | } |
2805 | } | |
2806 | noverlays = j; | |
2807 | ||
2808 | /* Sort the overlays into the proper order: increasing priority. */ | |
2809 | ||
2810 | if (noverlays > 1) | |
2811 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2812 | ||
2813 | for (i = 0; i < noverlays; i++) | |
2814 | overlay_vec[i] = sortvec[i].overlay; | |
2815 | return (noverlays); | |
2816 | } | |
2817 | \f | |
bbbe9545 KH |
2818 | struct sortstr |
2819 | { | |
cb26008f | 2820 | Lisp_Object string, string2; |
bbbe9545 KH |
2821 | int size; |
2822 | int priority; | |
2823 | }; | |
2824 | ||
e8185fa8 KH |
2825 | struct sortstrlist |
2826 | { | |
2827 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2828 | int size; /* Allocated length of that array. */ | |
2829 | int used; /* How much of the array is currently in use. */ | |
2830 | int bytes; /* Total length of the strings in buf. */ | |
2831 | }; | |
2832 | ||
2833 | /* Buffers for storing information about the overlays touching a given | |
2834 | position. These could be automatic variables in overlay_strings, but | |
2835 | it's more efficient to hold onto the memory instead of repeatedly | |
2836 | allocating and freeing it. */ | |
2837 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2838 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2839 | |
2840 | /* Allocated length of overlay_str_buf. */ | |
2841 | static int overlay_str_len; | |
2842 | ||
bbbe9545 KH |
2843 | /* A comparison function suitable for passing to qsort. */ |
2844 | static int | |
2845 | cmp_for_strings (as1, as2) | |
2846 | char *as1, *as2; | |
2847 | { | |
2848 | struct sortstr *s1 = (struct sortstr *)as1; | |
2849 | struct sortstr *s2 = (struct sortstr *)as2; | |
2850 | if (s1->size != s2->size) | |
2851 | return s2->size - s1->size; | |
2852 | if (s1->priority != s2->priority) | |
2853 | return s1->priority - s2->priority; | |
2854 | return 0; | |
2855 | } | |
2856 | ||
e8185fa8 | 2857 | static void |
cb26008f | 2858 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2859 | struct sortstrlist *ssl; |
cb26008f | 2860 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2861 | int size; |
2862 | { | |
43d27a72 RS |
2863 | int nbytes; |
2864 | ||
e8185fa8 KH |
2865 | if (ssl->used == ssl->size) |
2866 | { | |
2867 | if (ssl->buf) | |
2868 | ssl->size *= 2; | |
2869 | else | |
2870 | ssl->size = 5; | |
2871 | ssl->buf = ((struct sortstr *) | |
2872 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2873 | } | |
2874 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2875 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2876 | ssl->buf[ssl->used].size = size; |
2877 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2878 | ssl->used++; | |
43d27a72 RS |
2879 | |
2880 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2881 | nbytes = SCHARS (str); |
43d27a72 | 2882 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2883 | nbytes = count_size_as_multibyte (SDATA (str), |
2884 | SBYTES (str)); | |
43d27a72 | 2885 | else |
d5db4077 | 2886 | nbytes = SBYTES (str); |
43d27a72 RS |
2887 | |
2888 | ssl->bytes += nbytes; | |
2889 | ||
cb26008f | 2890 | if (STRINGP (str2)) |
43d27a72 RS |
2891 | { |
2892 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2893 | nbytes = SCHARS (str2); |
43d27a72 | 2894 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2895 | nbytes = count_size_as_multibyte (SDATA (str2), |
2896 | SBYTES (str2)); | |
43d27a72 | 2897 | else |
d5db4077 | 2898 | nbytes = SBYTES (str2); |
43d27a72 RS |
2899 | |
2900 | ssl->bytes += nbytes; | |
2901 | } | |
e8185fa8 | 2902 | } |
bbbe9545 KH |
2903 | |
2904 | /* Return the concatenation of the strings associated with overlays that | |
2905 | begin or end at POS, ignoring overlays that are specific to a window | |
2906 | other than W. The strings are concatenated in the appropriate order: | |
2907 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2908 | lower. Normally all of the after-strings come first, but zero-sized |
2909 | overlays have their after-strings ride along with the before-strings | |
2910 | because it would look strange to print them inside-out. | |
2911 | ||
2912 | Returns the string length, and stores the contents indirectly through | |
2913 | PSTR, if that variable is non-null. The string may be overwritten by | |
2914 | subsequent calls. */ | |
6b5d3b89 | 2915 | |
bbbe9545 KH |
2916 | int |
2917 | overlay_strings (pos, w, pstr) | |
2918 | int pos; | |
2919 | struct window *w; | |
6b5d3b89 | 2920 | unsigned char **pstr; |
bbbe9545 | 2921 | { |
e8185fa8 | 2922 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2923 | int startpos, endpos; |
43d27a72 | 2924 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2925 | |
e8185fa8 KH |
2926 | overlay_heads.used = overlay_heads.bytes = 0; |
2927 | overlay_tails.used = overlay_tails.bytes = 0; | |
7539e11f | 2928 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2929 | { |
7539e11f | 2930 | overlay = XCAR (ov); |
bbbe9545 KH |
2931 | if (!OVERLAYP (overlay)) |
2932 | abort (); | |
2933 | ||
2934 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2935 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2936 | if (endpos < pos) | |
2937 | break; | |
2938 | if (endpos != pos && startpos != pos) | |
2939 | continue; | |
2940 | window = Foverlay_get (overlay, Qwindow); | |
2941 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2942 | continue; | |
e8185fa8 KH |
2943 | if (startpos == pos |
2944 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2945 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2946 | (startpos == endpos |
2947 | ? Foverlay_get (overlay, Qafter_string) | |
2948 | : Qnil), | |
2949 | Foverlay_get (overlay, Qpriority), | |
2950 | endpos - startpos); | |
2951 | else if (endpos == pos | |
2952 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2953 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2954 | Foverlay_get (overlay, Qpriority), |
2955 | endpos - startpos); | |
bbbe9545 | 2956 | } |
7539e11f | 2957 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2958 | { |
7539e11f | 2959 | overlay = XCAR (ov); |
bbbe9545 KH |
2960 | if (!OVERLAYP (overlay)) |
2961 | abort (); | |
2962 | ||
2963 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2964 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2965 | if (startpos > pos) | |
2966 | break; | |
e8185fa8 KH |
2967 | if (endpos != pos && startpos != pos) |
2968 | continue; | |
2969 | window = Foverlay_get (overlay, Qwindow); | |
2970 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2971 | continue; | |
e8185fa8 KH |
2972 | if (startpos == pos |
2973 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2974 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2975 | (startpos == endpos |
2976 | ? Foverlay_get (overlay, Qafter_string) | |
2977 | : Qnil), | |
2978 | Foverlay_get (overlay, Qpriority), | |
2979 | endpos - startpos); | |
2980 | else if (endpos == pos | |
2981 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2982 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2983 | Foverlay_get (overlay, Qpriority), |
2984 | endpos - startpos); | |
bbbe9545 | 2985 | } |
e8185fa8 KH |
2986 | if (overlay_tails.used > 1) |
2987 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2988 | cmp_for_strings); | |
2989 | if (overlay_heads.used > 1) | |
2990 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2991 | cmp_for_strings); | |
2992 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2993 | { |
e8185fa8 | 2994 | Lisp_Object tem; |
bbbe9545 | 2995 | int i; |
9f4d7cde | 2996 | unsigned char *p; |
e8185fa8 | 2997 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2998 | |
2999 | if (total > overlay_str_len) | |
9f4d7cde RS |
3000 | { |
3001 | overlay_str_len = total; | |
3002 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3003 | total); | |
3004 | } | |
bbbe9545 | 3005 | p = overlay_str_buf; |
e8185fa8 | 3006 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3007 | { |
43d27a72 | 3008 | int nbytes; |
e8185fa8 | 3009 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3010 | nbytes = copy_text (SDATA (tem), p, |
3011 | SBYTES (tem), | |
43d27a72 RS |
3012 | STRING_MULTIBYTE (tem), multibyte); |
3013 | p += nbytes; | |
bbbe9545 | 3014 | } |
e8185fa8 | 3015 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3016 | { |
43d27a72 | 3017 | int nbytes; |
e8185fa8 | 3018 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3019 | nbytes = copy_text (SDATA (tem), p, |
3020 | SBYTES (tem), | |
43d27a72 RS |
3021 | STRING_MULTIBYTE (tem), multibyte); |
3022 | p += nbytes; | |
cb26008f KH |
3023 | tem = overlay_heads.buf[i].string2; |
3024 | if (STRINGP (tem)) | |
3025 | { | |
d5db4077 KR |
3026 | nbytes = copy_text (SDATA (tem), p, |
3027 | SBYTES (tem), | |
43d27a72 RS |
3028 | STRING_MULTIBYTE (tem), multibyte); |
3029 | p += nbytes; | |
cb26008f | 3030 | } |
bbbe9545 | 3031 | } |
cb26008f KH |
3032 | if (p != overlay_str_buf + total) |
3033 | abort (); | |
bbbe9545 KH |
3034 | if (pstr) |
3035 | *pstr = overlay_str_buf; | |
e8185fa8 | 3036 | return total; |
bbbe9545 | 3037 | } |
e8185fa8 | 3038 | return 0; |
bbbe9545 KH |
3039 | } |
3040 | \f | |
5c4f68f1 | 3041 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3042 | |
2eec3b4e | 3043 | void |
5c4f68f1 JB |
3044 | recenter_overlay_lists (buf, pos) |
3045 | struct buffer *buf; | |
2eec3b4e RS |
3046 | int pos; |
3047 | { | |
3048 | Lisp_Object overlay, tail, next, prev, beg, end; | |
3049 | ||
3050 | /* See if anything in overlays_before should move to overlays_after. */ | |
3051 | ||
3052 | /* We don't strictly need prev in this loop; it should always be nil. | |
3053 | But we use it for symmetry and in case that should cease to be true | |
3054 | with some future change. */ | |
3055 | prev = Qnil; | |
5c4f68f1 | 3056 | for (tail = buf->overlays_before; |
2eec3b4e RS |
3057 | CONSP (tail); |
3058 | prev = tail, tail = next) | |
1ab256cb | 3059 | { |
7539e11f KR |
3060 | next = XCDR (tail); |
3061 | overlay = XCAR (tail); | |
2eec3b4e RS |
3062 | |
3063 | /* If the overlay is not valid, get rid of it. */ | |
3064 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3065 | #if 1 |
3066 | abort (); | |
3067 | #else | |
2eec3b4e RS |
3068 | { |
3069 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3070 | if (!NILP (prev)) | |
7539e11f | 3071 | XCDR (prev) = next; |
2eec3b4e | 3072 | else |
5c4f68f1 | 3073 | buf->overlays_before = next; |
2eec3b4e RS |
3074 | tail = prev; |
3075 | continue; | |
3076 | } | |
52f8ec73 | 3077 | #endif |
1ab256cb | 3078 | |
2eec3b4e RS |
3079 | beg = OVERLAY_START (overlay); |
3080 | end = OVERLAY_END (overlay); | |
1ab256cb | 3081 | |
2eec3b4e | 3082 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3083 | { |
2eec3b4e RS |
3084 | /* OVERLAY needs to be moved. */ |
3085 | int where = OVERLAY_POSITION (beg); | |
3086 | Lisp_Object other, other_prev; | |
3087 | ||
3088 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3089 | if (!NILP (prev)) | |
f3fbd155 | 3090 | XSETCDR (prev, next); |
2eec3b4e | 3091 | else |
5c4f68f1 | 3092 | buf->overlays_before = next; |
2eec3b4e RS |
3093 | |
3094 | /* Search thru overlays_after for where to put it. */ | |
3095 | other_prev = Qnil; | |
5c4f68f1 | 3096 | for (other = buf->overlays_after; |
2eec3b4e | 3097 | CONSP (other); |
7539e11f | 3098 | other_prev = other, other = XCDR (other)) |
1ab256cb | 3099 | { |
6af718a4 | 3100 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3101 | |
7539e11f | 3102 | otheroverlay = XCAR (other); |
2eec3b4e | 3103 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3104 | abort (); |
2eec3b4e RS |
3105 | |
3106 | otherbeg = OVERLAY_START (otheroverlay); | |
3107 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3108 | break; | |
1ab256cb | 3109 | } |
2eec3b4e RS |
3110 | |
3111 | /* Add TAIL to overlays_after before OTHER. */ | |
f3fbd155 | 3112 | XSETCDR (tail, other); |
2eec3b4e | 3113 | if (!NILP (other_prev)) |
f3fbd155 | 3114 | XSETCDR (other_prev, tail); |
1ab256cb | 3115 | else |
5c4f68f1 | 3116 | buf->overlays_after = tail; |
2eec3b4e | 3117 | tail = prev; |
1ab256cb | 3118 | } |
2eec3b4e RS |
3119 | else |
3120 | /* We've reached the things that should stay in overlays_before. | |
3121 | All the rest of overlays_before must end even earlier, | |
3122 | so stop now. */ | |
3123 | break; | |
3124 | } | |
3125 | ||
3126 | /* See if anything in overlays_after should be in overlays_before. */ | |
3127 | prev = Qnil; | |
5c4f68f1 | 3128 | for (tail = buf->overlays_after; |
2eec3b4e RS |
3129 | CONSP (tail); |
3130 | prev = tail, tail = next) | |
3131 | { | |
7539e11f KR |
3132 | next = XCDR (tail); |
3133 | overlay = XCAR (tail); | |
2eec3b4e RS |
3134 | |
3135 | /* If the overlay is not valid, get rid of it. */ | |
3136 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3137 | #if 1 |
3138 | abort (); | |
3139 | #else | |
2eec3b4e RS |
3140 | { |
3141 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3142 | if (!NILP (prev)) | |
7539e11f | 3143 | XCDR (prev) = next; |
2eec3b4e | 3144 | else |
5c4f68f1 | 3145 | buf->overlays_after = next; |
2eec3b4e RS |
3146 | tail = prev; |
3147 | continue; | |
3148 | } | |
52f8ec73 | 3149 | #endif |
2eec3b4e RS |
3150 | |
3151 | beg = OVERLAY_START (overlay); | |
3152 | end = OVERLAY_END (overlay); | |
3153 | ||
3154 | /* Stop looking, when we know that nothing further | |
3155 | can possibly end before POS. */ | |
3156 | if (OVERLAY_POSITION (beg) > pos) | |
3157 | break; | |
3158 | ||
3159 | if (OVERLAY_POSITION (end) <= pos) | |
3160 | { | |
3161 | /* OVERLAY needs to be moved. */ | |
3162 | int where = OVERLAY_POSITION (end); | |
3163 | Lisp_Object other, other_prev; | |
3164 | ||
3165 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3166 | if (!NILP (prev)) | |
f3fbd155 | 3167 | XSETCDR (prev, next); |
2eec3b4e | 3168 | else |
5c4f68f1 | 3169 | buf->overlays_after = next; |
2eec3b4e RS |
3170 | |
3171 | /* Search thru overlays_before for where to put it. */ | |
3172 | other_prev = Qnil; | |
5c4f68f1 | 3173 | for (other = buf->overlays_before; |
2eec3b4e | 3174 | CONSP (other); |
7539e11f | 3175 | other_prev = other, other = XCDR (other)) |
2eec3b4e RS |
3176 | { |
3177 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3178 | |
7539e11f | 3179 | otheroverlay = XCAR (other); |
2eec3b4e | 3180 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3181 | abort (); |
2eec3b4e RS |
3182 | |
3183 | otherend = OVERLAY_END (otheroverlay); | |
3184 | if (OVERLAY_POSITION (otherend) <= where) | |
3185 | break; | |
3186 | } | |
3187 | ||
3188 | /* Add TAIL to overlays_before before OTHER. */ | |
f3fbd155 | 3189 | XSETCDR (tail, other); |
2eec3b4e | 3190 | if (!NILP (other_prev)) |
f3fbd155 | 3191 | XSETCDR (other_prev, tail); |
2eec3b4e | 3192 | else |
5c4f68f1 | 3193 | buf->overlays_before = tail; |
2eec3b4e RS |
3194 | tail = prev; |
3195 | } | |
3196 | } | |
3197 | ||
8d7a4592 | 3198 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 3199 | } |
2b1bdf65 | 3200 | |
423cdb46 KH |
3201 | void |
3202 | adjust_overlays_for_insert (pos, length) | |
3203 | int pos; | |
3204 | int length; | |
3205 | { | |
3206 | /* After an insertion, the lists are still sorted properly, | |
3207 | but we may need to update the value of the overlay center. */ | |
3208 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
3209 | XSETFASTINT (current_buffer->overlay_center, | |
3210 | XFASTINT (current_buffer->overlay_center) + length); | |
3211 | } | |
3212 | ||
3213 | void | |
3214 | adjust_overlays_for_delete (pos, length) | |
3215 | int pos; | |
3216 | int length; | |
3217 | { | |
3218 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
3219 | /* The deletion was to our right. No change needed; the before- and | |
3220 | after-lists are still consistent. */ | |
3221 | ; | |
3222 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
3223 | /* The deletion was to our left. We need to adjust the center value | |
3224 | to account for the change in position, but the lists are consistent | |
3225 | given the new value. */ | |
3226 | XSETFASTINT (current_buffer->overlay_center, | |
3227 | XFASTINT (current_buffer->overlay_center) - length); | |
3228 | else | |
3229 | /* We're right in the middle. There might be things on the after-list | |
3230 | that now belong on the before-list. Recentering will move them, | |
3231 | and also update the center point. */ | |
3232 | recenter_overlay_lists (current_buffer, pos); | |
3233 | } | |
3234 | ||
2b1bdf65 KH |
3235 | /* Fix up overlays that were garbled as a result of permuting markers |
3236 | in the range START through END. Any overlay with at least one | |
3237 | endpoint in this range will need to be unlinked from the overlay | |
3238 | list and reinserted in its proper place. | |
3239 | Such an overlay might even have negative size at this point. | |
3240 | If so, we'll reverse the endpoints. Can you think of anything | |
3241 | better to do in this situation? */ | |
3242 | void | |
3243 | fix_overlays_in_range (start, end) | |
3244 | register int start, end; | |
3245 | { | |
6af718a4 | 3246 | Lisp_Object overlay; |
2b1bdf65 | 3247 | Lisp_Object before_list, after_list; |
1138e742 KR |
3248 | /* These are either nil, indicating that before_list or after_list |
3249 | should be assigned, or the cons cell the cdr of which should be | |
3250 | assigned. */ | |
3251 | Lisp_Object beforep = Qnil, afterp = Qnil; | |
3252 | /* 'Parent', likewise, indicates a cons cell or | |
3253 | current_buffer->overlays_before or overlays_after, depending | |
3254 | which loop we're in. */ | |
3255 | Lisp_Object tail, parent; | |
2b1bdf65 KH |
3256 | int startpos, endpos; |
3257 | ||
3258 | /* This algorithm shifts links around instead of consing and GCing. | |
3259 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3260 | well-formed list except that its last element, the CDR of beforep |
3261 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3262 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3263 | that before_list isn't initialized, although it may look | |
3264 | strange. */ | |
3265 | for (parent = Qnil, tail = current_buffer->overlays_before; CONSP (tail);) | |
2b1bdf65 | 3266 | { |
1138e742 | 3267 | overlay = XCAR (tail); |
2b1bdf65 KH |
3268 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3269 | if (endpos < start) | |
3270 | break; | |
3271 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3272 | if (endpos < end | |
3273 | || (startpos >= start && startpos < end)) | |
3274 | { | |
3275 | /* If the overlay is backwards, fix that now. */ | |
3276 | if (startpos > endpos) | |
3277 | { | |
3278 | int tem; | |
2c99f3ea RS |
3279 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3280 | Qnil); | |
3281 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3282 | Qnil); | |
2b1bdf65 KH |
3283 | tem = startpos; startpos = endpos; endpos = tem; |
3284 | } | |
3285 | /* Add it to the end of the wrong list. Later on, | |
3286 | recenter_overlay_lists will move it to the right place. */ | |
3287 | if (endpos < XINT (current_buffer->overlay_center)) | |
3288 | { | |
1138e742 KR |
3289 | if (NILP (afterp)) |
3290 | after_list = tail; | |
3291 | else | |
3292 | XSETCDR (afterp, tail); | |
3293 | afterp = tail; | |
2b1bdf65 KH |
3294 | } |
3295 | else | |
3296 | { | |
1138e742 KR |
3297 | if (NILP (beforep)) |
3298 | before_list = tail; | |
3299 | else | |
3300 | XSETCDR (beforep, tail); | |
3301 | beforep = tail; | |
2b1bdf65 | 3302 | } |
1138e742 KR |
3303 | if (NILP (parent)) |
3304 | current_buffer->overlays_before = XCDR (tail); | |
3305 | else | |
3306 | XSETCDR (parent, XCDR (tail)); | |
3307 | tail = XCDR (tail); | |
2b1bdf65 KH |
3308 | } |
3309 | else | |
1138e742 | 3310 | parent = tail, tail = XCDR (parent); |
2b1bdf65 | 3311 | } |
1138e742 | 3312 | for (parent = Qnil, tail = current_buffer->overlays_after; CONSP (tail);) |
2b1bdf65 | 3313 | { |
1138e742 | 3314 | overlay = XCAR (tail); |
2b1bdf65 KH |
3315 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3316 | if (startpos >= end) | |
3317 | break; | |
3318 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3319 | if (startpos >= start | |
3320 | || (endpos >= start && endpos < end)) | |
3321 | { | |
3322 | if (startpos > endpos) | |
3323 | { | |
3324 | int tem; | |
2c99f3ea RS |
3325 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3326 | Qnil); | |
3327 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3328 | Qnil); | |
2b1bdf65 KH |
3329 | tem = startpos; startpos = endpos; endpos = tem; |
3330 | } | |
3331 | if (endpos < XINT (current_buffer->overlay_center)) | |
3332 | { | |
1138e742 KR |
3333 | if (NILP (afterp)) |
3334 | after_list = tail; | |
3335 | else | |
3336 | XSETCDR (afterp, tail); | |
3337 | afterp = tail; | |
2b1bdf65 KH |
3338 | } |
3339 | else | |
3340 | { | |
1138e742 KR |
3341 | if (NILP (beforep)) |
3342 | before_list = tail; | |
3343 | else | |
3344 | XSETCDR (beforep, tail); | |
3345 | beforep = tail; | |
2b1bdf65 | 3346 | } |
1138e742 KR |
3347 | if (NILP (parent)) |
3348 | current_buffer->overlays_after = XCDR (tail); | |
3349 | else | |
3350 | XSETCDR (parent, XCDR (tail)); | |
3351 | tail = XCDR (tail); | |
2b1bdf65 KH |
3352 | } |
3353 | else | |
1138e742 | 3354 | parent = tail, tail = XCDR (parent); |
2b1bdf65 KH |
3355 | } |
3356 | ||
3357 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3358 | and let the recenter function make it sane again. */ | |
1138e742 KR |
3359 | if (!NILP (beforep)) |
3360 | { | |
3361 | XSETCDR (beforep, current_buffer->overlays_before); | |
3362 | current_buffer->overlays_before = before_list; | |
3363 | } | |
2b1bdf65 KH |
3364 | recenter_overlay_lists (current_buffer, |
3365 | XINT (current_buffer->overlay_center)); | |
3366 | ||
1138e742 KR |
3367 | if (!NILP (afterp)) |
3368 | { | |
3369 | XSETCDR (afterp, current_buffer->overlays_after); | |
3370 | current_buffer->overlays_after = after_list; | |
3371 | } | |
2b1bdf65 KH |
3372 | recenter_overlay_lists (current_buffer, |
3373 | XINT (current_buffer->overlay_center)); | |
3374 | } | |
3b06f880 KH |
3375 | |
3376 | /* We have two types of overlay: the one whose ending marker is | |
3377 | after-insertion-marker (this is the usual case) and the one whose | |
3378 | ending marker is before-insertion-marker. When `overlays_before' | |
3379 | contains overlays of the latter type and the former type in this | |
3380 | order and both overlays end at inserting position, inserting a text | |
3381 | increases only the ending marker of the latter type, which results | |
3382 | in incorrect ordering of `overlays_before'. | |
3383 | ||
3384 | This function fixes ordering of overlays in the slot | |
3385 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3386 | was at PREV, and now is at POS. */ | |
3387 | ||
01136e9b | 3388 | void |
3b06f880 KH |
3389 | fix_overlays_before (bp, prev, pos) |
3390 | struct buffer *bp; | |
3391 | int prev, pos; | |
3392 | { | |
1138e742 KR |
3393 | /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */ |
3394 | Lisp_Object tail = bp->overlays_before, parent = Qnil; | |
3395 | Lisp_Object right_pair; | |
3b06f880 KH |
3396 | int end; |
3397 | ||
3398 | /* After the insertion, the several overlays may be in incorrect | |
3399 | order. The possibility is that, in the list `overlays_before', | |
3400 | an overlay which ends at POS appears after an overlay which ends | |
3401 | at PREV. Since POS is greater than PREV, we must fix the | |
3402 | ordering of these overlays, by moving overlays ends at POS before | |
3403 | the overlays ends at PREV. */ | |
3404 | ||
3405 | /* At first, find a place where disordered overlays should be linked | |
3406 | in. It is where an overlay which end before POS exists. (i.e. an | |
3407 | overlay whose ending marker is after-insertion-marker if disorder | |
3408 | exists). */ | |
1138e742 KR |
3409 | while (!NILP (tail) |
3410 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCAR (tail)))) | |
3b06f880 | 3411 | >= pos)) |
1138e742 KR |
3412 | { |
3413 | parent = tail; | |
3414 | tail = XCDR (tail); | |
3415 | } | |
3b06f880 KH |
3416 | |
3417 | /* If we don't find such an overlay, | |
3418 | or the found one ends before PREV, | |
3419 | or the found one is the last one in the list, | |
3420 | we don't have to fix anything. */ | |
1138e742 | 3421 | if (NILP (tail) |
3b06f880 | 3422 | || end < prev |
1138e742 | 3423 | || NILP (XCDR (tail))) |
3b06f880 KH |
3424 | return; |
3425 | ||
1138e742 KR |
3426 | right_pair = parent; |
3427 | parent = tail; | |
3428 | tail = XCDR (tail); | |
3b06f880 | 3429 | |
1138e742 | 3430 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3431 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3432 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3433 | we found an overlay which ends before PREV, the remaining | |
3434 | overlays are in correct order. */ | |
3435 | while (!NILP (tail)) | |
3b06f880 | 3436 | { |
1138e742 | 3437 | end = OVERLAY_POSITION (OVERLAY_END (XCAR (tail))); |
3b06f880 KH |
3438 | |
3439 | if (end == pos) | |
3440 | { /* This overlay is disordered. */ | |
1138e742 | 3441 | Lisp_Object found = tail; |
3b06f880 KH |
3442 | |
3443 | /* Unlink the found overlay. */ | |
504322ad KR |
3444 | tail = XCDR (found); |
3445 | XSETCDR (parent, tail); | |
1138e742 KR |
3446 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3447 | and link it into the right place. */ | |
3448 | if (NILP (right_pair)) | |
3449 | { | |
3450 | XSETCDR (found, bp->overlays_before); | |
3451 | bp->overlays_before = found; | |
3452 | } | |
3453 | else | |
3454 | { | |
3455 | XSETCDR (found, XCDR (right_pair)); | |
3456 | XSETCDR (right_pair, found); | |
3457 | } | |
3b06f880 KH |
3458 | } |
3459 | else if (end == prev) | |
1138e742 KR |
3460 | { |
3461 | parent = tail; | |
3462 | tail = XCDR (tail); | |
3463 | } | |
3b06f880 KH |
3464 | else /* No more disordered overlay. */ |
3465 | break; | |
3466 | } | |
3467 | } | |
2eec3b4e | 3468 | \f |
52f8ec73 | 3469 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3470 | doc: /* Return t if OBJECT is an overlay. */) |
3471 | (object) | |
52f8ec73 JB |
3472 | Lisp_Object object; |
3473 | { | |
3474 | return (OVERLAYP (object) ? Qt : Qnil); | |
3475 | } | |
3476 | ||
acac2700 | 3477 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3478 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3479 | If omitted, BUFFER defaults to the current buffer. |
3480 | BEG and END may be integers or markers. | |
3481 | The fourth arg FRONT-ADVANCE, if non-nil, makes the | |
3482 | front delimiter advance when text is inserted there. | |
3483 | The fifth arg REAR-ADVANCE, if non-nil, makes the | |
7ee72033 MB |
3484 | rear delimiter advance when text is inserted there. */) |
3485 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3486 | Lisp_Object beg, end, buffer; |
acac2700 | 3487 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3488 | { |
3489 | Lisp_Object overlay; | |
5c4f68f1 | 3490 | struct buffer *b; |
2eec3b4e | 3491 | |
5c4f68f1 | 3492 | if (NILP (buffer)) |
67180c6a | 3493 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3494 | else |
b7826503 | 3495 | CHECK_BUFFER (buffer); |
883047b9 JB |
3496 | if (MARKERP (beg) |
3497 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3498 | error ("Marker points into wrong buffer"); | |
3499 | if (MARKERP (end) | |
3500 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3501 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3502 | |
b7826503 PJ |
3503 | CHECK_NUMBER_COERCE_MARKER (beg); |
3504 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3505 | |
883047b9 | 3506 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3507 | { |
c99fc30f KH |
3508 | Lisp_Object temp; |
3509 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3510 | } |
883047b9 JB |
3511 | |
3512 | b = XBUFFER (buffer); | |
3513 | ||
3514 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3515 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3516 | |
acac2700 RS |
3517 | if (!NILP (front_advance)) |
3518 | XMARKER (beg)->insertion_type = 1; | |
3519 | if (!NILP (rear_advance)) | |
3520 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3521 | |
48e2e3ba | 3522 | overlay = allocate_misc (); |
89ca3e1b | 3523 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3524 | XOVERLAY (overlay)->start = beg; |
3525 | XOVERLAY (overlay)->end = end; | |
3526 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3527 | |
3528 | /* Put the new overlay on the wrong list. */ | |
3529 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3530 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3531 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3532 | else |
5c4f68f1 | 3533 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3534 | |
3535 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3536 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3537 | |
b61982dd JB |
3538 | /* We don't need to redisplay the region covered by the overlay, because |
3539 | the overlay has no properties at the moment. */ | |
3540 | ||
2eec3b4e RS |
3541 | return overlay; |
3542 | } | |
876aa27c RS |
3543 | \f |
3544 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3545 | ||
3546 | static void | |
3547 | modify_overlay (buf, start, end) | |
3548 | struct buffer *buf; | |
3549 | int start, end; | |
3550 | { | |
876aa27c RS |
3551 | if (start > end) |
3552 | { | |
3553 | int temp = start; | |
26f545d7 GM |
3554 | start = end; |
3555 | end = temp; | |
876aa27c RS |
3556 | } |
3557 | ||
481b5054 GM |
3558 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
3559 | ||
876aa27c RS |
3560 | /* If this is a buffer not in the selected window, |
3561 | we must do other windows. */ | |
3562 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3563 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3564 | /* If multiple windows show this buffer, we must do other windows. */ |
3565 | else if (buffer_shared > 1) | |
3566 | windows_or_buffers_changed = 1; | |
876aa27c | 3567 | |
d8b9150f | 3568 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3569 | } |
2eec3b4e | 3570 | |
018ba359 | 3571 | \f |
2e34157c RS |
3572 | Lisp_Object Fdelete_overlay (); |
3573 | ||
5c4f68f1 | 3574 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3575 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3576 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3577 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3578 | buffer. */) |
3579 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3580 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3581 | { |
0a4469c9 RS |
3582 | struct buffer *b, *ob; |
3583 | Lisp_Object obuffer; | |
aed13378 | 3584 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3585 | |
b7826503 | 3586 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3587 | if (NILP (buffer)) |
3588 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3589 | if (NILP (buffer)) |
67180c6a | 3590 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3591 | CHECK_BUFFER (buffer); |
883047b9 JB |
3592 | |
3593 | if (MARKERP (beg) | |
3594 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3595 | error ("Marker points into wrong buffer"); | |
3596 | if (MARKERP (end) | |
3597 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3598 | error ("Marker points into wrong buffer"); | |
3599 | ||
b7826503 PJ |
3600 | CHECK_NUMBER_COERCE_MARKER (beg); |
3601 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3602 | |
9d7608b7 KH |
3603 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3604 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3605 | |
b61982dd JB |
3606 | if (XINT (beg) > XINT (end)) |
3607 | { | |
c99fc30f KH |
3608 | Lisp_Object temp; |
3609 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3610 | } |
3611 | ||
9d7608b7 KH |
3612 | specbind (Qinhibit_quit, Qt); |
3613 | ||
0a4469c9 | 3614 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3615 | b = XBUFFER (buffer); |
8801a864 | 3616 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3617 | |
c82ed728 | 3618 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3619 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3620 | { |
3621 | /* Redisplay where the overlay was. */ | |
3622 | if (!NILP (obuffer)) | |
3623 | { | |
2e34157c RS |
3624 | int o_beg; |
3625 | int o_end; | |
50760c4a | 3626 | |
80509f2f RS |
3627 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3628 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3629 | |
2e34157c | 3630 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3631 | } |
3632 | ||
3633 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3634 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3635 | } |
c82ed728 JB |
3636 | else |
3637 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3638 | { | |
2e34157c | 3639 | int o_beg, o_end; |
c82ed728 | 3640 | |
80509f2f RS |
3641 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3642 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3643 | |
2e34157c RS |
3644 | if (o_beg == XINT (beg)) |
3645 | modify_overlay (b, o_end, XINT (end)); | |
3646 | else if (o_end == XINT (end)) | |
3647 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3648 | else |
3649 | { | |
2e34157c RS |
3650 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3651 | if (XINT (end) > o_end) o_end = XINT (end); | |
3652 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3653 | } |
3654 | } | |
b61982dd | 3655 | |
0a4469c9 RS |
3656 | if (!NILP (obuffer)) |
3657 | { | |
3658 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3659 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3660 | } | |
5c4f68f1 JB |
3661 | |
3662 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3663 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3664 | |
3665 | /* Put the overlay on the wrong list. */ | |
3666 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3667 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3668 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3669 | else |
5c4f68f1 | 3670 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3671 | |
3672 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3673 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3674 | |
0a4469c9 | 3675 | return unbind_to (count, overlay); |
2eec3b4e RS |
3676 | } |
3677 | ||
3678 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3679 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3680 | (overlay) | |
5c4f68f1 | 3681 | Lisp_Object overlay; |
2eec3b4e | 3682 | { |
0a4469c9 | 3683 | Lisp_Object buffer; |
5c4f68f1 | 3684 | struct buffer *b; |
aed13378 | 3685 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3686 | |
b7826503 | 3687 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3688 | |
0a4469c9 RS |
3689 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3690 | if (NILP (buffer)) | |
3691 | return Qnil; | |
3692 | ||
3693 | b = XBUFFER (buffer); | |
0a4469c9 | 3694 | specbind (Qinhibit_quit, Qt); |
26f545d7 | 3695 | |
5c4f68f1 | 3696 | b->overlays_before = Fdelq (overlay, b->overlays_before); |
26f545d7 | 3697 | b->overlays_after = Fdelq (overlay, b->overlays_after); |
876aa27c | 3698 | modify_overlay (b, |
8231a9aa RS |
3699 | marker_position (OVERLAY_START (overlay)), |
3700 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3701 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3702 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3703 | ||
e58c389d | 3704 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3705 | display optimizations for the affected buffer, on the basis that |
3706 | these strings may contain newlines. This is easier to do than to | |
3707 | check for that situation during redisplay. */ | |
3708 | if (!windows_or_buffers_changed | |
3709 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3710 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3711 | b->prevent_redisplay_optimizations_p = 1; | |
3712 | ||
0a4469c9 | 3713 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3714 | } |
3715 | \f | |
8ebafa8d JB |
3716 | /* Overlay dissection functions. */ |
3717 | ||
3718 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3719 | doc: /* Return the position at which OVERLAY starts. */) |
3720 | (overlay) | |
8ebafa8d JB |
3721 | Lisp_Object overlay; |
3722 | { | |
b7826503 | 3723 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3724 | |
3725 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3726 | } | |
3727 | ||
3728 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3729 | doc: /* Return the position at which OVERLAY ends. */) |
3730 | (overlay) | |
8ebafa8d JB |
3731 | Lisp_Object overlay; |
3732 | { | |
b7826503 | 3733 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3734 | |
3735 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3736 | } | |
3737 | ||
3738 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
7ee72033 MB |
3739 | doc: /* Return the buffer OVERLAY belongs to. */) |
3740 | (overlay) | |
8ebafa8d JB |
3741 | Lisp_Object overlay; |
3742 | { | |
b7826503 | 3743 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3744 | |
3745 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3746 | } | |
3747 | ||
3748 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3749 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3750 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3751 | OVERLAY. */) |
3752 | (overlay) | |
8ebafa8d JB |
3753 | Lisp_Object overlay; |
3754 | { | |
b7826503 | 3755 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3756 | |
48e2e3ba | 3757 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3758 | } |
3759 | ||
3760 | \f | |
2eec3b4e | 3761 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3762 | doc: /* Return a list of the overlays that contain position POS. */) |
3763 | (pos) | |
2eec3b4e RS |
3764 | Lisp_Object pos; |
3765 | { | |
3766 | int noverlays; | |
2eec3b4e RS |
3767 | Lisp_Object *overlay_vec; |
3768 | int len; | |
3769 | Lisp_Object result; | |
3770 | ||
b7826503 | 3771 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3772 | |
3773 | len = 10; | |
a9800ae8 | 3774 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3775 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3776 | ||
3777 | /* Put all the overlays we want in a vector in overlay_vec. | |
3778 | Store the length in len. */ | |
2a77a7d7 | 3779 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3780 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3781 | |
3782 | /* Make a list of them all. */ | |
3783 | result = Flist (noverlays, overlay_vec); | |
3784 | ||
9ac0d9e0 | 3785 | xfree (overlay_vec); |
2eec3b4e RS |
3786 | return result; |
3787 | } | |
3788 | ||
74514898 | 3789 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3790 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3791 | Overlap means that at least one character is contained within the overlay |
3792 | and also contained within the specified region. | |
3793 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3794 | or between BEG and END. */) |
3795 | (beg, end) | |
74514898 RS |
3796 | Lisp_Object beg, end; |
3797 | { | |
3798 | int noverlays; | |
3799 | Lisp_Object *overlay_vec; | |
3800 | int len; | |
3801 | Lisp_Object result; | |
3802 | ||
b7826503 PJ |
3803 | CHECK_NUMBER_COERCE_MARKER (beg); |
3804 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3805 | |
3806 | len = 10; | |
3807 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3808 | ||
3809 | /* Put all the overlays we want in a vector in overlay_vec. | |
3810 | Store the length in len. */ | |
3811 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3812 | (int *) 0, (int *) 0); | |
3813 | ||
3814 | /* Make a list of them all. */ | |
3815 | result = Flist (noverlays, overlay_vec); | |
3816 | ||
3817 | xfree (overlay_vec); | |
3818 | return result; | |
3819 | } | |
3820 | ||
2eec3b4e | 3821 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3822 | 1, 1, 0, |
7ee72033 MB |
3823 | doc: /* Return the next position after POS where an overlay starts or ends. |
3824 | If there are no more overlay boundaries after POS, return (point-max). */) | |
3825 | (pos) | |
2eec3b4e RS |
3826 | Lisp_Object pos; |
3827 | { | |
3828 | int noverlays; | |
3829 | int endpos; | |
3830 | Lisp_Object *overlay_vec; | |
3831 | int len; | |
2eec3b4e RS |
3832 | int i; |
3833 | ||
b7826503 | 3834 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3835 | |
3836 | len = 10; | |
3837 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3838 | ||
3839 | /* Put all the overlays we want in a vector in overlay_vec. | |
3840 | Store the length in len. | |
3841 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3842 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3843 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3844 | |
3845 | /* If any of these overlays ends before endpos, | |
3846 | use its ending point instead. */ | |
3847 | for (i = 0; i < noverlays; i++) | |
3848 | { | |
3849 | Lisp_Object oend; | |
3850 | int oendpos; | |
3851 | ||
3852 | oend = OVERLAY_END (overlay_vec[i]); | |
3853 | oendpos = OVERLAY_POSITION (oend); | |
3854 | if (oendpos < endpos) | |
3855 | endpos = oendpos; | |
1ab256cb RM |
3856 | } |
3857 | ||
9ac0d9e0 | 3858 | xfree (overlay_vec); |
2eec3b4e RS |
3859 | return make_number (endpos); |
3860 | } | |
239c932b RS |
3861 | |
3862 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3863 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 MB |
3864 | doc: /* Return the previous position before POS where an overlay starts or ends. |
3865 | If there are no more overlay boundaries before POS, return (point-min). */) | |
3866 | (pos) | |
239c932b RS |
3867 | Lisp_Object pos; |
3868 | { | |
3869 | int noverlays; | |
3870 | int prevpos; | |
3871 | Lisp_Object *overlay_vec; | |
3872 | int len; | |
239c932b | 3873 | |
b7826503 | 3874 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3875 | |
624bbdc4 RS |
3876 | /* At beginning of buffer, we know the answer; |
3877 | avoid bug subtracting 1 below. */ | |
3878 | if (XINT (pos) == BEGV) | |
3879 | return pos; | |
3880 | ||
017f0539 GM |
3881 | len = 10; |
3882 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3883 | ||
239c932b RS |
3884 | /* Put all the overlays we want in a vector in overlay_vec. |
3885 | Store the length in len. | |
daa1c109 | 3886 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 3887 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3888 | (int *) 0, &prevpos, 1); |
239c932b | 3889 | |
239c932b RS |
3890 | xfree (overlay_vec); |
3891 | return make_number (prevpos); | |
3892 | } | |
2eec3b4e RS |
3893 | \f |
3894 | /* These functions are for debugging overlays. */ | |
3895 | ||
3896 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 3897 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
3898 | The car has all the overlays before the overlay center; |
3899 | the cdr has all the overlays after the overlay center. | |
3900 | Recentering overlays moves overlays between these lists. | |
3901 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
3902 | However, the overlays you get are the real objects that the buffer uses. */) |
3903 | () | |
2eec3b4e RS |
3904 | { |
3905 | Lisp_Object before, after; | |
3906 | before = current_buffer->overlays_before; | |
3907 | if (CONSP (before)) | |
3908 | before = Fcopy_sequence (before); | |
3909 | after = current_buffer->overlays_after; | |
3910 | if (CONSP (after)) | |
3911 | after = Fcopy_sequence (after); | |
3912 | ||
3913 | return Fcons (before, after); | |
3914 | } | |
3915 | ||
3916 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
7ee72033 MB |
3917 | doc: /* Recenter the overlays of the current buffer around position POS. */) |
3918 | (pos) | |
2eec3b4e RS |
3919 | Lisp_Object pos; |
3920 | { | |
b7826503 | 3921 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 3922 | |
5c4f68f1 | 3923 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3924 | return Qnil; |
3925 | } | |
3926 | \f | |
3927 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
3928 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
3929 | (overlay, prop) | |
2eec3b4e RS |
3930 | Lisp_Object overlay, prop; |
3931 | { | |
b7826503 | 3932 | CHECK_OVERLAY (overlay); |
9a593927 | 3933 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
3934 | } |
3935 | ||
3936 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
3937 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
3938 | (overlay, prop, value) | |
2eec3b4e RS |
3939 | Lisp_Object overlay, prop, value; |
3940 | { | |
48e2e3ba | 3941 | Lisp_Object tail, buffer; |
9d7608b7 | 3942 | int changed; |
2eec3b4e | 3943 | |
b7826503 | 3944 | CHECK_OVERLAY (overlay); |
b61982dd | 3945 | |
274a9425 RS |
3946 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3947 | ||
48e2e3ba | 3948 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
3949 | CONSP (tail) && CONSP (XCDR (tail)); |
3950 | tail = XCDR (XCDR (tail))) | |
3951 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 3952 | { |
7539e11f | 3953 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 3954 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 3955 | goto found; |
274a9425 | 3956 | } |
9d7608b7 KH |
3957 | /* It wasn't in the list, so add it to the front. */ |
3958 | changed = !NILP (value); | |
48e2e3ba KH |
3959 | XOVERLAY (overlay)->plist |
3960 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3961 | found: |
3962 | if (! NILP (buffer)) | |
3963 | { | |
3964 | if (changed) | |
876aa27c | 3965 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
3966 | marker_position (OVERLAY_START (overlay)), |
3967 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
3968 | if (EQ (prop, Qevaporate) && ! NILP (value) |
3969 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3970 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3971 | Fdelete_overlay (overlay); | |
3972 | } | |
2eec3b4e | 3973 | return value; |
1ab256cb RM |
3974 | } |
3975 | \f | |
9115729e KH |
3976 | /* Subroutine of report_overlay_modification. */ |
3977 | ||
3978 | /* Lisp vector holding overlay hook functions to call. | |
3979 | Vector elements come in pairs. | |
3980 | Each even-index element is a list of hook functions. | |
3981 | The following odd-index element is the overlay they came from. | |
3982 | ||
3983 | Before the buffer change, we fill in this vector | |
3984 | as we call overlay hook functions. | |
3985 | After the buffer change, we get the functions to call from this vector. | |
3986 | This way we always call the same functions before and after the change. */ | |
3987 | static Lisp_Object last_overlay_modification_hooks; | |
3988 | ||
3989 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3990 | static int last_overlay_modification_hooks_used; | |
3991 | ||
3992 | /* Add one functionlist/overlay pair | |
3993 | to the end of last_overlay_modification_hooks. */ | |
3994 | ||
3995 | static void | |
3996 | add_overlay_mod_hooklist (functionlist, overlay) | |
3997 | Lisp_Object functionlist, overlay; | |
3998 | { | |
3999 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4000 | ||
4001 | if (last_overlay_modification_hooks_used == oldsize) | |
4002 | { | |
4003 | Lisp_Object old; | |
4004 | old = last_overlay_modification_hooks; | |
4005 | last_overlay_modification_hooks | |
4006 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4007 | bcopy (XVECTOR (old)->contents, |
4008 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4009 | sizeof (Lisp_Object) * oldsize); |
4010 | } | |
4011 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
4012 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
4013 | } | |
4014 | \f | |
173f2a64 RS |
4015 | /* Run the modification-hooks of overlays that include |
4016 | any part of the text in START to END. | |
9115729e KH |
4017 | If this change is an insertion, also |
4018 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4019 | and the insert-after-hooks of overlay ending at START. |
4020 | ||
4021 | This is called both before and after the modification. | |
4022 | AFTER is nonzero when we call after the modification. | |
4023 | ||
9115729e KH |
4024 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4025 | When AFTER is nonzero, they are the start position, | |
4026 | the position after the inserted new text, | |
4027 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4028 | |
4029 | void | |
930a9140 | 4030 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4031 | Lisp_Object start, end; |
930a9140 RS |
4032 | int after; |
4033 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
4034 | { |
4035 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
4036 | /* 1 if this change is an insertion. */ |
4037 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 4038 | int tail_copied; |
930a9140 | 4039 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
4040 | |
4041 | overlay = Qnil; | |
4042 | tail = Qnil; | |
930a9140 | 4043 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 4044 | |
9115729e KH |
4045 | if (after) |
4046 | { | |
4047 | /* Call the functions recorded in last_overlay_modification_hooks | |
4048 | rather than scanning the overlays again. | |
4049 | First copy the vector contents, in case some of these hooks | |
4050 | do subsequent modification of the buffer. */ | |
4051 | int size = last_overlay_modification_hooks_used; | |
4052 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4053 | int i; | |
4054 | ||
4055 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4056 | copy, size * sizeof (Lisp_Object)); | |
4057 | gcpro1.var = copy; | |
4058 | gcpro1.nvars = size; | |
4059 | ||
4060 | for (i = 0; i < size;) | |
4061 | { | |
4062 | Lisp_Object prop, overlay; | |
4063 | prop = copy[i++]; | |
4064 | overlay = copy[i++]; | |
4065 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4066 | } | |
4067 | UNGCPRO; | |
4068 | return; | |
4069 | } | |
4070 | ||
4071 | /* We are being called before a change. | |
4072 | Scan the overlays to find the functions to call. */ | |
4073 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 4074 | tail_copied = 0; |
173f2a64 RS |
4075 | for (tail = current_buffer->overlays_before; |
4076 | CONSP (tail); | |
7539e11f | 4077 | tail = XCDR (tail)) |
173f2a64 RS |
4078 | { |
4079 | int startpos, endpos; | |
be8b1c6b | 4080 | Lisp_Object ostart, oend; |
173f2a64 | 4081 | |
7539e11f | 4082 | overlay = XCAR (tail); |
173f2a64 RS |
4083 | |
4084 | ostart = OVERLAY_START (overlay); | |
4085 | oend = OVERLAY_END (overlay); | |
4086 | endpos = OVERLAY_POSITION (oend); | |
4087 | if (XFASTINT (start) > endpos) | |
4088 | break; | |
4089 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
4090 | if (insertion && (XFASTINT (start) == startpos |
4091 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
4092 | { |
4093 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
4094 | if (!NILP (prop)) |
4095 | { | |
4096 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
4097 | if (!tail_copied) |
4098 | tail = Fcopy_sequence (tail); | |
4099 | tail_copied = 1; | |
930a9140 | 4100 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4101 | } |
173f2a64 | 4102 | } |
9115729e KH |
4103 | if (insertion && (XFASTINT (start) == endpos |
4104 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
4105 | { |
4106 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
4107 | if (!NILP (prop)) |
4108 | { | |
55b48893 RS |
4109 | if (!tail_copied) |
4110 | tail = Fcopy_sequence (tail); | |
4111 | tail_copied = 1; | |
930a9140 | 4112 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4113 | } |
173f2a64 | 4114 | } |
3bd13e92 KH |
4115 | /* Test for intersecting intervals. This does the right thing |
4116 | for both insertion and deletion. */ | |
4117 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
4118 | { |
4119 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
4120 | if (!NILP (prop)) |
4121 | { | |
55b48893 RS |
4122 | if (!tail_copied) |
4123 | tail = Fcopy_sequence (tail); | |
4124 | tail_copied = 1; | |
930a9140 | 4125 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4126 | } |
173f2a64 RS |
4127 | } |
4128 | } | |
4129 | ||
55b48893 | 4130 | tail_copied = 0; |
173f2a64 RS |
4131 | for (tail = current_buffer->overlays_after; |
4132 | CONSP (tail); | |
7539e11f | 4133 | tail = XCDR (tail)) |
173f2a64 RS |
4134 | { |
4135 | int startpos, endpos; | |
be8b1c6b | 4136 | Lisp_Object ostart, oend; |
173f2a64 | 4137 | |
7539e11f | 4138 | overlay = XCAR (tail); |
173f2a64 RS |
4139 | |
4140 | ostart = OVERLAY_START (overlay); | |
4141 | oend = OVERLAY_END (overlay); | |
4142 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 4143 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
4144 | if (XFASTINT (end) < startpos) |
4145 | break; | |
9115729e KH |
4146 | if (insertion && (XFASTINT (start) == startpos |
4147 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
4148 | { |
4149 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
4150 | if (!NILP (prop)) |
4151 | { | |
55b48893 RS |
4152 | if (!tail_copied) |
4153 | tail = Fcopy_sequence (tail); | |
4154 | tail_copied = 1; | |
930a9140 | 4155 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4156 | } |
173f2a64 | 4157 | } |
9115729e KH |
4158 | if (insertion && (XFASTINT (start) == endpos |
4159 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
4160 | { |
4161 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
4162 | if (!NILP (prop)) |
4163 | { | |
55b48893 RS |
4164 | if (!tail_copied) |
4165 | tail = Fcopy_sequence (tail); | |
4166 | tail_copied = 1; | |
930a9140 | 4167 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4168 | } |
173f2a64 | 4169 | } |
3bd13e92 KH |
4170 | /* Test for intersecting intervals. This does the right thing |
4171 | for both insertion and deletion. */ | |
4172 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
4173 | { |
4174 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
4175 | if (!NILP (prop)) |
4176 | { | |
55b48893 RS |
4177 | if (!tail_copied) |
4178 | tail = Fcopy_sequence (tail); | |
4179 | tail_copied = 1; | |
930a9140 | 4180 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4181 | } |
173f2a64 RS |
4182 | } |
4183 | } | |
55b48893 RS |
4184 | |
4185 | UNGCPRO; | |
173f2a64 RS |
4186 | } |
4187 | ||
4188 | static void | |
930a9140 RS |
4189 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4190 | Lisp_Object list, overlay; | |
4191 | int after; | |
4192 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4193 | { |
930a9140 | 4194 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4195 | |
930a9140 | 4196 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
4197 | if (! after) |
4198 | add_overlay_mod_hooklist (list, overlay); | |
4199 | ||
173f2a64 RS |
4200 | while (!NILP (list)) |
4201 | { | |
930a9140 RS |
4202 | if (NILP (arg3)) |
4203 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
4204 | else | |
4205 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
4206 | list = Fcdr (list); |
4207 | } | |
4208 | UNGCPRO; | |
4209 | } | |
9d7608b7 KH |
4210 | |
4211 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4212 | property is set. */ | |
4213 | void | |
4214 | evaporate_overlays (pos) | |
4215 | int pos; | |
4216 | { | |
4217 | Lisp_Object tail, overlay, hit_list; | |
4218 | ||
4219 | hit_list = Qnil; | |
4220 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
4221 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
7539e11f | 4222 | tail = XCDR (tail)) |
9d7608b7 KH |
4223 | { |
4224 | int endpos; | |
7539e11f | 4225 | overlay = XCAR (tail); |
9d7608b7 KH |
4226 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4227 | if (endpos < pos) | |
4228 | break; | |
4229 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4230 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4231 | hit_list = Fcons (overlay, hit_list); |
4232 | } | |
4233 | else | |
4234 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
7539e11f | 4235 | tail = XCDR (tail)) |
9d7608b7 KH |
4236 | { |
4237 | int startpos; | |
7539e11f | 4238 | overlay = XCAR (tail); |
9d7608b7 KH |
4239 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4240 | if (startpos > pos) | |
4241 | break; | |
4242 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4243 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4244 | hit_list = Fcons (overlay, hit_list); |
4245 | } | |
7539e11f KR |
4246 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4247 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4248 | } |
173f2a64 | 4249 | \f |
54dfdeb0 | 4250 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4251 | in the slot with offset OFFSET. */ |
4252 | ||
0fa3ba92 | 4253 | void |
54dfdeb0 KH |
4254 | buffer_slot_type_mismatch (offset) |
4255 | int offset; | |
0fa3ba92 | 4256 | { |
54dfdeb0 | 4257 | Lisp_Object sym; |
0fa3ba92 | 4258 | char *type_name; |
7c02e886 | 4259 | |
7313acd0 | 4260 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4261 | { |
7c02e886 GM |
4262 | case Lisp_Int: |
4263 | type_name = "integers"; | |
4264 | break; | |
4265 | ||
4266 | case Lisp_String: | |
4267 | type_name = "strings"; | |
4268 | break; | |
4269 | ||
4270 | case Lisp_Symbol: | |
4271 | type_name = "symbols"; | |
4272 | break; | |
4273 | ||
0fa3ba92 JB |
4274 | default: |
4275 | abort (); | |
4276 | } | |
4277 | ||
7313acd0 | 4278 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4279 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4280 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4281 | } |
7c02e886 | 4282 | |
0fa3ba92 | 4283 | \f |
b86af064 GM |
4284 | /*********************************************************************** |
4285 | Allocation with mmap | |
4286 | ***********************************************************************/ | |
4287 | ||
4288 | #ifdef USE_MMAP_FOR_BUFFERS | |
4289 | ||
4290 | #include <sys/types.h> | |
4291 | #include <sys/mman.h> | |
4292 | ||
4293 | #ifndef MAP_ANON | |
4294 | #ifdef MAP_ANONYMOUS | |
4295 | #define MAP_ANON MAP_ANONYMOUS | |
4296 | #else | |
4297 | #define MAP_ANON 0 | |
4298 | #endif | |
4299 | #endif | |
4300 | ||
09dfdf85 GM |
4301 | #ifndef MAP_FAILED |
4302 | #define MAP_FAILED ((void *) -1) | |
4303 | #endif | |
4304 | ||
b86af064 GM |
4305 | #include <stdio.h> |
4306 | #include <errno.h> | |
4307 | ||
4308 | #if MAP_ANON == 0 | |
4309 | #include <fcntl.h> | |
4310 | #endif | |
4311 | ||
4312 | #include "coding.h" | |
4313 | ||
4314 | ||
4315 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4316 | The current implementation lets the system select mapped | |
4317 | addresses; we're not using MAP_FIXED in general, except when | |
4318 | trying to enlarge regions. | |
4319 | ||
4320 | Each mapped region starts with a mmap_region structure, the user | |
4321 | area starts after that structure, aligned to MEM_ALIGN. | |
4322 | ||
4323 | +-----------------------+ | |
4324 | | struct mmap_info + | | |
4325 | | padding | | |
4326 | +-----------------------+ | |
4327 | | user data | | |
4328 | | | | |
4329 | | | | |
4330 | +-----------------------+ */ | |
4331 | ||
4332 | struct mmap_region | |
4333 | { | |
4334 | /* User-specified size. */ | |
4335 | size_t nbytes_specified; | |
4336 | ||
4337 | /* Number of bytes mapped */ | |
4338 | size_t nbytes_mapped; | |
4339 | ||
4340 | /* Pointer to the location holding the address of the memory | |
4341 | allocated with the mmap'd block. The variable actually points | |
4342 | after this structure. */ | |
4343 | POINTER_TYPE **var; | |
4344 | ||
4345 | /* Next and previous in list of all mmap'd regions. */ | |
4346 | struct mmap_region *next, *prev; | |
4347 | }; | |
4348 | ||
4349 | /* Doubly-linked list of mmap'd regions. */ | |
4350 | ||
4351 | static struct mmap_region *mmap_regions; | |
4352 | ||
4353 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4354 | /dev/zero will be opened on it. */ | |
4355 | ||
4356 | static int mmap_fd; | |
4357 | ||
4358 | /* Temporary storage for mmap_set_vars, see there. */ | |
4359 | ||
4360 | static struct mmap_region *mmap_regions_1; | |
4361 | static int mmap_fd_1; | |
4362 | ||
4363 | /* Page size on this system. */ | |
4364 | ||
4365 | static int mmap_page_size; | |
4366 | ||
4367 | /* 1 means mmap has been intialized. */ | |
4368 | ||
4369 | static int mmap_initialized_p; | |
4370 | ||
4371 | /* Value is X rounded up to the next multiple of N. */ | |
4372 | ||
4373 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4374 | ||
4375 | /* Size of mmap_region structure plus padding. */ | |
4376 | ||
4377 | #define MMAP_REGION_STRUCT_SIZE \ | |
4378 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4379 | ||
4380 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4381 | region, return a pointer to the start of the region. */ | |
4382 | ||
4383 | #define MMAP_REGION(P) \ | |
4384 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4385 | ||
4386 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4387 | to the start of the user-visible part of the region. */ | |
4388 | ||
4389 | #define MMAP_USER_AREA(P) \ | |
4390 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4391 | ||
4392 | #define MEM_ALIGN sizeof (double) | |
4393 | ||
08327b22 GM |
4394 | /* Predicate returning true if part of the address range [START .. |
4395 | END[ is currently mapped. Used to prevent overwriting an existing | |
4396 | memory mapping. | |
4397 | ||
4398 | Default is to conservativly assume the address range is occupied by | |
4399 | something else. This can be overridden by system configuration | |
4400 | files if system-specific means to determine this exists. */ | |
4401 | ||
4402 | #ifndef MMAP_ALLOCATED_P | |
4403 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4404 | #endif | |
4405 | ||
b86af064 GM |
4406 | /* Function prototypes. */ |
4407 | ||
4408 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4409 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4410 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4411 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4412 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4413 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4414 | static void mmap_init P_ ((void)); | |
4415 | ||
4416 | ||
4417 | /* Return a region overlapping address range START...END, or null if | |
4418 | none. END is not including, i.e. the last byte in the range | |
4419 | is at END - 1. */ | |
4420 | ||
4421 | static struct mmap_region * | |
4422 | mmap_find (start, end) | |
4423 | POINTER_TYPE *start, *end; | |
4424 | { | |
4425 | struct mmap_region *r; | |
4426 | char *s = (char *) start, *e = (char *) end; | |
4427 | ||
4428 | for (r = mmap_regions; r; r = r->next) | |
4429 | { | |
4430 | char *rstart = (char *) r; | |
4431 | char *rend = rstart + r->nbytes_mapped; | |
4432 | ||
4433 | if (/* First byte of range, i.e. START, in this region? */ | |
4434 | (s >= rstart && s < rend) | |
4435 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4436 | || (e > rstart && e <= rend) | |
4437 | /* First byte of this region in the range? */ | |
4438 | || (rstart >= s && rstart < e) | |
4439 | /* Last byte of this region in the range? */ | |
4440 | || (rend > s && rend <= e)) | |
4441 | break; | |
4442 | } | |
4443 | ||
4444 | return r; | |
4445 | } | |
4446 | ||
4447 | ||
4448 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4449 | the region. Value is non-zero if successful. */ | |
4450 | ||
4451 | static int | |
4452 | mmap_free_1 (r) | |
4453 | struct mmap_region *r; | |
4454 | { | |
4455 | if (r->next) | |
4456 | r->next->prev = r->prev; | |
4457 | if (r->prev) | |
4458 | r->prev->next = r->next; | |
4459 | else | |
4460 | mmap_regions = r->next; | |
4461 | ||
1a15cca0 | 4462 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4463 | { |
4464 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4465 | return 0; | |
4466 | } | |
4467 | ||
4468 | return 1; | |
4469 | } | |
4470 | ||
4471 | ||
4472 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4473 | Value is non-zero if successful. */ | |
4474 | ||
4475 | static int | |
4476 | mmap_enlarge (r, npages) | |
4477 | struct mmap_region *r; | |
4478 | int npages; | |
4479 | { | |
4480 | char *region_end = (char *) r + r->nbytes_mapped; | |
4481 | size_t nbytes; | |
4482 | int success = 0; | |
4483 | ||
4484 | if (npages < 0) | |
4485 | { | |
4486 | /* Unmap pages at the end of the region. */ | |
4487 | nbytes = - npages * mmap_page_size; | |
4488 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4489 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4490 | else | |
4491 | { | |
4492 | r->nbytes_mapped -= nbytes; | |
4493 | success = 1; | |
4494 | } | |
4495 | } | |
4496 | else if (npages > 0) | |
4497 | { | |
b86af064 GM |
4498 | nbytes = npages * mmap_page_size; |
4499 | ||
4500 | /* Try to map additional pages at the end of the region. We | |
4501 | cannot do this if the address range is already occupied by | |
4502 | something else because mmap deletes any previous mapping. | |
4503 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4504 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4505 | { |
4506 | POINTER_TYPE *p; | |
4507 | ||
4508 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, | |
4509 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4510 | if (p == MAP_FAILED) | |
edaa9aed | 4511 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4512 | else if (p != (POINTER_TYPE *) region_end) |
4513 | { | |
4514 | /* Kernels are free to choose a different address. In | |
4515 | that case, unmap what we've mapped above; we have | |
4516 | no use for it. */ | |
4517 | if (munmap (p, nbytes) == -1) | |
4518 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4519 | } | |
4520 | else | |
4521 | { | |
4522 | r->nbytes_mapped += nbytes; | |
4523 | success = 1; | |
4524 | } | |
4525 | } | |
4526 | } | |
4527 | ||
4528 | return success; | |
4529 | } | |
4530 | ||
4531 | ||
4532 | /* Set or reset variables holding references to mapped regions. If | |
4533 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4534 | non-zero, set all variables to the start of the user-areas | |
4535 | of mapped regions. | |
4536 | ||
4537 | This function is called from Fdump_emacs to ensure that the dumped | |
4538 | Emacs doesn't contain references to memory that won't be mapped | |
4539 | when Emacs starts. */ | |
4540 | ||
4541 | void | |
4542 | mmap_set_vars (restore_p) | |
4543 | int restore_p; | |
4544 | { | |
4545 | struct mmap_region *r; | |
4546 | ||
4547 | if (restore_p) | |
4548 | { | |
4549 | mmap_regions = mmap_regions_1; | |
4550 | mmap_fd = mmap_fd_1; | |
4551 | for (r = mmap_regions; r; r = r->next) | |
4552 | *r->var = MMAP_USER_AREA (r); | |
4553 | } | |
4554 | else | |
4555 | { | |
4556 | for (r = mmap_regions; r; r = r->next) | |
4557 | *r->var = NULL; | |
4558 | mmap_regions_1 = mmap_regions; | |
4559 | mmap_regions = NULL; | |
4560 | mmap_fd_1 = mmap_fd; | |
4561 | mmap_fd = -1; | |
4562 | } | |
4563 | } | |
4564 | ||
4565 | ||
4566 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4567 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4568 | address of some variable which will use the data area. | |
4569 | ||
4570 | The allocation of 0 bytes is valid. | |
4571 | ||
4572 | If we can't allocate the necessary memory, set *VAR to null, and | |
4573 | return null. */ | |
4574 | ||
4575 | static POINTER_TYPE * | |
4576 | mmap_alloc (var, nbytes) | |
4577 | POINTER_TYPE **var; | |
4578 | size_t nbytes; | |
4579 | { | |
4580 | void *p; | |
4581 | size_t map; | |
4582 | ||
4583 | mmap_init (); | |
4584 | ||
4585 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4586 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4587 | mmap_fd, 0); | |
4588 | ||
4589 | if (p == MAP_FAILED) | |
4590 | { | |
4591 | if (errno != ENOMEM) | |
4592 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4593 | p = NULL; | |
4594 | } | |
4595 | else | |
4596 | { | |
4597 | struct mmap_region *r = (struct mmap_region *) p; | |
4598 | ||
4599 | r->nbytes_specified = nbytes; | |
4600 | r->nbytes_mapped = map; | |
4601 | r->var = var; | |
4602 | r->prev = NULL; | |
4603 | r->next = mmap_regions; | |
4604 | if (r->next) | |
4605 | r->next->prev = r; | |
4606 | mmap_regions = r; | |
4607 | ||
4608 | p = MMAP_USER_AREA (p); | |
4609 | } | |
4610 | ||
4611 | return *var = p; | |
4612 | } | |
4613 | ||
4614 | ||
4615 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4616 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4617 | and return this value. If more memory cannot be allocated, then | |
4618 | leave *VAR unchanged, and return null. */ | |
4619 | ||
4620 | static POINTER_TYPE * | |
4621 | mmap_realloc (var, nbytes) | |
4622 | POINTER_TYPE **var; | |
4623 | size_t nbytes; | |
4624 | { | |
4625 | POINTER_TYPE *result; | |
4626 | ||
4627 | mmap_init (); | |
4628 | ||
4629 | if (*var == NULL) | |
4630 | result = mmap_alloc (var, nbytes); | |
4631 | else if (nbytes == 0) | |
4632 | { | |
4633 | mmap_free (var); | |
4634 | result = mmap_alloc (var, nbytes); | |
4635 | } | |
4636 | else | |
4637 | { | |
4638 | struct mmap_region *r = MMAP_REGION (*var); | |
4639 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
4640 | ||
4641 | if (room < nbytes) | |
4642 | { | |
4643 | /* Must enlarge. */ | |
4644 | POINTER_TYPE *old_ptr = *var; | |
4645 | ||
4646 | /* Try to map additional pages at the end of the region. | |
4647 | If that fails, allocate a new region, copy data | |
4648 | from the old region, then free it. */ | |
4649 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4650 | / mmap_page_size))) | |
4651 | { | |
4652 | r->nbytes_specified = nbytes; | |
4653 | *var = result = old_ptr; | |
4654 | } | |
4655 | else if (mmap_alloc (var, nbytes)) | |
4656 | { | |
4657 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4658 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4659 | result = *var; | |
4660 | r = MMAP_REGION (result); | |
4661 | r->nbytes_specified = nbytes; | |
4662 | } | |
4663 | else | |
4664 | { | |
4665 | *var = old_ptr; | |
4666 | result = NULL; | |
4667 | } | |
4668 | } | |
4669 | else if (room - nbytes >= mmap_page_size) | |
4670 | { | |
4671 | /* Shrinking by at least a page. Let's give some | |
4672 | memory back to the system. */ | |
bb63c5c9 | 4673 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4674 | result = *var; |
4675 | r->nbytes_specified = nbytes; | |
4676 | } | |
4677 | else | |
4678 | { | |
4679 | /* Leave it alone. */ | |
4680 | result = *var; | |
4681 | r->nbytes_specified = nbytes; | |
4682 | } | |
4683 | } | |
4684 | ||
4685 | return result; | |
4686 | } | |
4687 | ||
4688 | ||
4689 | /* Free a block of relocatable storage whose data is pointed to by | |
4690 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4691 | ||
4692 | static void | |
4693 | mmap_free (var) | |
4694 | POINTER_TYPE **var; | |
4695 | { | |
4696 | mmap_init (); | |
4697 | ||
4698 | if (*var) | |
4699 | { | |
4700 | mmap_free_1 (MMAP_REGION (*var)); | |
4701 | *var = NULL; | |
4702 | } | |
4703 | } | |
4704 | ||
4705 | ||
4706 | /* Perform necessary intializations for the use of mmap. */ | |
4707 | ||
4708 | static void | |
4709 | mmap_init () | |
4710 | { | |
4711 | #if MAP_ANON == 0 | |
4712 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4713 | in a dumped Emacs. */ | |
4714 | if (mmap_fd <= 0) | |
4715 | { | |
4716 | /* No anonymous mmap -- we need the file descriptor. */ | |
4717 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4718 | if (mmap_fd == -1) | |
4719 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4720 | } | |
4721 | #endif /* MAP_ANON == 0 */ | |
4722 | ||
4723 | if (mmap_initialized_p) | |
4724 | return; | |
4725 | mmap_initialized_p = 1; | |
4726 | ||
4727 | #if MAP_ANON != 0 | |
4728 | mmap_fd = -1; | |
4729 | #endif | |
4730 | ||
4731 | mmap_page_size = getpagesize (); | |
4732 | } | |
4733 | ||
4734 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4735 | ||
4736 | ||
4737 | \f | |
4738 | /*********************************************************************** | |
4739 | Buffer-text Allocation | |
4740 | ***********************************************************************/ | |
4741 | ||
4742 | #ifdef REL_ALLOC | |
4743 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4744 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4745 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4746 | #endif /* REL_ALLOC */ | |
4747 | ||
4748 | ||
4749 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4750 | ||
4751 | static void | |
4752 | alloc_buffer_text (b, nbytes) | |
4753 | struct buffer *b; | |
4754 | size_t nbytes; | |
4755 | { | |
4756 | POINTER_TYPE *p; | |
4757 | ||
4758 | BLOCK_INPUT; | |
4759 | #if defined USE_MMAP_FOR_BUFFERS | |
4760 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4761 | #elif defined REL_ALLOC | |
4762 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4763 | #else | |
815add84 | 4764 | p = xmalloc (nbytes); |
b86af064 GM |
4765 | #endif |
4766 | ||
4767 | if (p == NULL) | |
4768 | { | |
4769 | UNBLOCK_INPUT; | |
4770 | memory_full (); | |
4771 | } | |
4772 | ||
4773 | b->text->beg = (unsigned char *) p; | |
4774 | UNBLOCK_INPUT; | |
4775 | } | |
4776 | ||
4777 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4778 | shrink it. */ | |
4779 | ||
4780 | void | |
4781 | enlarge_buffer_text (b, delta) | |
4782 | struct buffer *b; | |
4783 | int delta; | |
4784 | { | |
4785 | POINTER_TYPE *p; | |
4786 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4787 | + delta); | |
4788 | BLOCK_INPUT; | |
4789 | #if defined USE_MMAP_FOR_BUFFERS | |
4790 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4791 | #elif defined REL_ALLOC | |
4792 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4793 | #else | |
4794 | p = xrealloc (b->text->beg, nbytes); | |
4795 | #endif | |
4796 | ||
4797 | if (p == NULL) | |
4798 | { | |
4799 | UNBLOCK_INPUT; | |
4800 | memory_full (); | |
4801 | } | |
4802 | ||
4803 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4804 | UNBLOCK_INPUT; | |
4805 | } | |
4806 | ||
4807 | ||
4808 | /* Free buffer B's text buffer. */ | |
4809 | ||
4810 | static void | |
4811 | free_buffer_text (b) | |
4812 | struct buffer *b; | |
4813 | { | |
4814 | BLOCK_INPUT; | |
4815 | ||
4816 | #if defined USE_MMAP_FOR_BUFFERS | |
4817 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4818 | #elif defined REL_ALLOC | |
4819 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4820 | #else | |
4821 | xfree (b->text->beg); | |
4822 | #endif | |
4823 | ||
4824 | BUF_BEG_ADDR (b) = NULL; | |
4825 | UNBLOCK_INPUT; | |
4826 | } | |
4827 | ||
4828 | ||
4829 | \f | |
4830 | /*********************************************************************** | |
4831 | Initialization | |
4832 | ***********************************************************************/ | |
4833 | ||
dfcf069d | 4834 | void |
1ab256cb RM |
4835 | init_buffer_once () |
4836 | { | |
7c02e886 GM |
4837 | int idx; |
4838 | ||
4839 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4840 | |
1ab256cb RM |
4841 | /* Make sure all markable slots in buffer_defaults |
4842 | are initialized reasonably, so mark_buffer won't choke. */ | |
4843 | reset_buffer (&buffer_defaults); | |
13de9290 | 4844 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4845 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4846 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4847 | /* Prevent GC from getting confused. */ |
4848 | buffer_defaults.text = &buffer_defaults.own_text; | |
4849 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4850 | BUF_INTERVALS (&buffer_defaults) = 0; |
4851 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4852 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4853 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4854 | |
4855 | /* Set up the default values of various buffer slots. */ | |
4856 | /* Must do these before making the first buffer! */ | |
4857 | ||
f532dca0 | 4858 | /* real setup is done in bindings.el */ |
1ab256cb | 4859 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4860 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4861 | buffer_defaults.abbrev_mode = Qnil; |
4862 | buffer_defaults.overwrite_mode = Qnil; | |
4863 | buffer_defaults.case_fold_search = Qt; | |
4864 | buffer_defaults.auto_fill_function = Qnil; | |
4865 | buffer_defaults.selective_display = Qnil; | |
4866 | #ifndef old | |
4867 | buffer_defaults.selective_display_ellipses = Qt; | |
4868 | #endif | |
4869 | buffer_defaults.abbrev_table = Qnil; | |
4870 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4871 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4872 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4873 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
4874 | buffer_defaults.overlays_before = Qnil; |
4875 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 4876 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 4877 | |
8d7a4592 | 4878 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4879 | buffer_defaults.truncate_lines = Qnil; |
4880 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4881 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4882 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4883 | buffer_defaults.extra_line_spacing = Qnil; |
1ab256cb | 4884 | |
f7975d07 | 4885 | #ifdef DOS_NT |
0776cb1b | 4886 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4887 | #endif |
a1a17b61 | 4888 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4889 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4890 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4891 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4892 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4893 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4894 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
4895 | buffer_defaults.indicate_empty_lines = Qnil; |
4896 | buffer_defaults.scroll_up_aggressively = Qnil; | |
4897 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 4898 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
4899 | |
4900 | /* Assign the local-flags to the slots that have default values. | |
4901 | The local flag is a bit that is used in the buffer | |
4902 | to say that it has its own local value for the slot. | |
4903 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4904 | ||
4905 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 4906 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
4907 | |
4908 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
4909 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
4910 | XSETINT (buffer_local_flags.filename, -1); |
4911 | XSETINT (buffer_local_flags.directory, -1); | |
4912 | XSETINT (buffer_local_flags.backed_up, -1); | |
4913 | XSETINT (buffer_local_flags.save_length, -1); | |
4914 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
4915 | XSETINT (buffer_local_flags.read_only, -1); | |
4916 | XSETINT (buffer_local_flags.major_mode, -1); | |
4917 | XSETINT (buffer_local_flags.mode_name, -1); | |
4918 | XSETINT (buffer_local_flags.undo_list, -1); | |
4919 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 4920 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 4921 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 4922 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 4923 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 4924 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 4925 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 4926 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 4927 | |
7c02e886 GM |
4928 | idx = 1; |
4929 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
4930 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
4931 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
4932 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
4933 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
4934 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 4935 | #ifndef old |
7c02e886 | 4936 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 4937 | #endif |
7c02e886 GM |
4938 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
4939 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
4940 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
4941 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
4942 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
4943 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
4944 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 4945 | #ifdef DOS_NT |
7c02e886 | 4946 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 4947 | /* Make this one a permanent local. */ |
7c02e886 | 4948 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 4949 | #endif |
7c02e886 GM |
4950 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
4951 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
4952 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
4953 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
4954 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); | |
a1a17b61 | 4955 | /* Make this one a permanent local. */ |
7c02e886 GM |
4956 | buffer_permanent_local_flags[idx++] = 1; |
4957 | XSETFASTINT (buffer_local_flags.left_margin_width, idx); ++idx; | |
4958 | XSETFASTINT (buffer_local_flags.right_margin_width, idx); ++idx; | |
4959 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; | |
4960 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; | |
4961 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
4962 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 4963 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 4964 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
7c02e886 GM |
4965 | |
4966 | /* Need more room? */ | |
7313acd0 | 4967 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 4968 | abort (); |
7313acd0 | 4969 | last_per_buffer_idx = idx; |
c71b5d9b | 4970 | |
1ab256cb RM |
4971 | Vbuffer_alist = Qnil; |
4972 | current_buffer = 0; | |
4973 | all_buffers = 0; | |
4974 | ||
4975 | QSFundamental = build_string ("Fundamental"); | |
4976 | ||
4977 | Qfundamental_mode = intern ("fundamental-mode"); | |
4978 | buffer_defaults.major_mode = Qfundamental_mode; | |
4979 | ||
4980 | Qmode_class = intern ("mode-class"); | |
4981 | ||
4982 | Qprotected_field = intern ("protected-field"); | |
4983 | ||
4984 | Qpermanent_local = intern ("permanent-local"); | |
4985 | ||
4986 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
4987 | ||
4988 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 4989 | |
1ab256cb RM |
4990 | /* super-magic invisible buffer */ |
4991 | Vbuffer_alist = Qnil; | |
4992 | ||
ffd56f97 | 4993 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
4994 | |
4995 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
4996 | } |
4997 | ||
dfcf069d | 4998 | void |
1ab256cb RM |
4999 | init_buffer () |
5000 | { | |
93c27ef1 | 5001 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
5002 | char *pwd; |
5003 | struct stat dotstat, pwdstat; | |
136351b7 | 5004 | Lisp_Object temp; |
f7975d07 | 5005 | int rc; |
1ab256cb | 5006 | |
b86af064 | 5007 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5008 | { |
5009 | /* When using the ralloc implementation based on mmap(2), buffer | |
5010 | text pointers will have been set to null in the dumped Emacs. | |
5011 | Map new memory. */ | |
5012 | struct buffer *b; | |
5013 | ||
93c27ef1 GM |
5014 | for (b = all_buffers; b; b = b->next) |
5015 | if (b->text->beg == NULL) | |
b86af064 | 5016 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5017 | } |
b86af064 | 5018 | #endif /* USE_MMAP_FOR_BUFFERS */ |
93c27ef1 | 5019 | |
1ab256cb | 5020 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5021 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5022 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5023 | |
314dbe9a PE |
5024 | /* If PWD is accurate, use it instead of calling getwd. PWD is |
5025 | sometimes a nicer name, and using it may avoid a fatal error if a | |
5026 | parent directory is searchable but not readable. */ | |
309f2a6e RS |
5027 | if ((pwd = getenv ("PWD")) != 0 |
5028 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
5029 | && stat (pwd, &pwdstat) == 0 |
5030 | && stat (".", &dotstat) == 0 | |
5031 | && dotstat.st_ino == pwdstat.st_ino | |
5032 | && dotstat.st_dev == pwdstat.st_dev | |
5033 | && strlen (pwd) < MAXPATHLEN) | |
5034 | strcpy (buf, pwd); | |
6335beb0 RS |
5035 | #ifdef HAVE_GETCWD |
5036 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 5037 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 5038 | #else |
2381d133 | 5039 | else if (getwd (buf) == 0) |
cf1e6391 | 5040 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 5041 | #endif |
1ab256cb RM |
5042 | |
5043 | #ifndef VMS | |
5044 | /* Maybe this should really use some standard subroutine | |
5045 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
5046 | rc = strlen (buf); |
5047 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
5048 | { | |
5049 | buf[rc] = DIRECTORY_SEP; | |
5050 | buf[rc + 1] = '\0'; | |
5051 | } | |
1ab256cb | 5052 | #endif /* not VMS */ |
0995fa35 | 5053 | |
1ab256cb | 5054 | current_buffer->directory = build_string (buf); |
136351b7 | 5055 | |
0995fa35 RS |
5056 | /* Add /: to the front of the name |
5057 | if it would otherwise be treated as magic. */ | |
5058 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5059 | if (! NILP (temp) |
5060 | /* If the default dir is just /, TEMP is non-nil | |
5061 | because of the ange-ftp completion handler. | |
5062 | However, it is not necessary to turn / into /:/. | |
5063 | So avoid doing that. */ | |
d5db4077 | 5064 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5065 | current_buffer->directory |
5066 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5067 | ||
136351b7 RS |
5068 | temp = get_minibuffer (0); |
5069 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
5070 | } |
5071 | ||
5072 | /* initialize the buffer routines */ | |
dfcf069d | 5073 | void |
1ab256cb RM |
5074 | syms_of_buffer () |
5075 | { | |
9115729e KH |
5076 | staticpro (&last_overlay_modification_hooks); |
5077 | last_overlay_modification_hooks | |
5078 | = Fmake_vector (make_number (10), Qnil); | |
5079 | ||
1ab256cb RM |
5080 | staticpro (&Vbuffer_defaults); |
5081 | staticpro (&Vbuffer_local_symbols); | |
5082 | staticpro (&Qfundamental_mode); | |
5083 | staticpro (&Qmode_class); | |
5084 | staticpro (&QSFundamental); | |
5085 | staticpro (&Vbuffer_alist); | |
5086 | staticpro (&Qprotected_field); | |
5087 | staticpro (&Qpermanent_local); | |
5088 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5089 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5090 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5091 | Qevaporate = intern ("evaporate"); |
5092 | staticpro (&Qevaporate); | |
294d215f | 5093 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5094 | staticpro (&Qmodification_hooks); |
294d215f | 5095 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5096 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5097 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5098 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5099 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5100 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5101 | Qpriority = intern ("priority"); |
5102 | staticpro (&Qpriority); | |
5103 | Qwindow = intern ("window"); | |
5104 | staticpro (&Qwindow); | |
bbbe9545 KH |
5105 | Qbefore_string = intern ("before-string"); |
5106 | staticpro (&Qbefore_string); | |
5107 | Qafter_string = intern ("after-string"); | |
5108 | staticpro (&Qafter_string); | |
22378665 RS |
5109 | Qfirst_change_hook = intern ("first-change-hook"); |
5110 | staticpro (&Qfirst_change_hook); | |
5111 | Qbefore_change_functions = intern ("before-change-functions"); | |
5112 | staticpro (&Qbefore_change_functions); | |
5113 | Qafter_change_functions = intern ("after-change-functions"); | |
5114 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
5115 | |
5116 | Fput (Qprotected_field, Qerror_conditions, | |
5117 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5118 | Fput (Qprotected_field, Qerror_message, | |
5119 | build_string ("Attempt to modify a protected field")); | |
5120 | ||
5121 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5122 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5123 | ||
5124 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5125 | &buffer_defaults.mode_line_format, |
5126 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5127 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5128 | |
045dee35 | 5129 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5130 | &buffer_defaults.header_line_format, |
5131 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5132 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5133 | |
7ee72033 MB |
5134 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5135 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5136 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5137 | |
a3bbced0 | 5138 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5139 | &buffer_defaults.extra_line_spacing, |
5140 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5141 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5142 | |
1ab256cb | 5143 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5144 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5145 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5146 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5147 | |
5148 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5149 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5150 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5151 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5152 | |
3b06f880 | 5153 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
efc7e75f | 5154 | &buffer_defaults.direction_reversed, |
7ee72033 | 5155 | doc: /* Default value of `direction_reversed' for buffers that do not override it. |
018ba359 | 5156 | This is the same as (default-value 'direction-reversed). */); |
3b06f880 | 5157 | |
a1a17b61 | 5158 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
efc7e75f | 5159 | &buffer_defaults.enable_multibyte_characters, |
7ee72033 | 5160 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5161 | This is the same as (default-value 'enable-multibyte-characters). */); |
a1a17b61 | 5162 | |
c71b5d9b | 5163 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
efc7e75f | 5164 | &buffer_defaults.buffer_file_coding_system, |
7ee72033 | 5165 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. |
018ba359 | 5166 | This is the same as (default-value 'buffer-file-coding-system). */); |
c71b5d9b | 5167 | |
1ab256cb | 5168 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5169 | &buffer_defaults.truncate_lines, |
5170 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5171 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5172 | |
5173 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5174 | &buffer_defaults.fill_column, |
5175 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5176 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5177 | |
5178 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5179 | &buffer_defaults.left_margin, |
5180 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5181 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5182 | |
5183 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5184 | &buffer_defaults.tab_width, |
5185 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5186 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5187 | |
5188 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5189 | &buffer_defaults.case_fold_search, |
5190 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5191 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5192 | |
f7975d07 | 5193 | #ifdef DOS_NT |
54ad07d3 | 5194 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5195 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5196 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5197 | This is the same as (default-value 'buffer-file-type). |
5198 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5199 | #endif |
5200 | ||
0552666b | 5201 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
efc7e75f PJ |
5202 | &buffer_defaults.left_margin_width, |
5203 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5204 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5205 | |
5206 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
efc7e75f PJ |
5207 | &buffer_defaults.right_margin_width, |
5208 | doc: /* Default value of `right_margin_width' for buffers that don't override it. | |
018ba359 | 5209 | This is the same as (default-value 'right-margin-width). */); |
0552666b GM |
5210 | |
5211 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
efc7e75f PJ |
5212 | &buffer_defaults.indicate_empty_lines, |
5213 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5214 | This is the same as (default-value 'indicate-empty-lines). */); |
0552666b GM |
5215 | |
5216 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
efc7e75f | 5217 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5218 | doc: /* Default value of `scroll-up-aggressively'. |
5219 | This value applies in buffers that don't have their own local values. | |
5220 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
0552666b GM |
5221 | |
5222 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
efc7e75f | 5223 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5224 | doc: /* Default value of `scroll-down-aggressively'. |
5225 | This value applies in buffers that don't have their own local values. | |
5226 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
0552666b | 5227 | |
045dee35 | 5228 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5229 | ¤t_buffer->header_line_format, |
7ee72033 | 5230 | Qnil, |
7614d762 RS |
5231 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5232 | The header line appears, optionally, at the top of a window; | |
5233 | the mode line appears at the bottom. */); | |
0552666b | 5234 | |
1ab256cb | 5235 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5236 | Qnil, |
5237 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5238 | Each buffer has its own value of this variable. |
5239 | Value may be nil, a string, a symbol or a list or cons cell. | |
5240 | A value of nil means don't display a mode line. | |
5241 | For a symbol, its value is used (but it is ignored if t or nil). | |
5242 | A string appearing directly as the value of a symbol is processed verbatim | |
5243 | in that the %-constructs below are not recognized. | |
5244 | For a list of the form `(:eval FORM)', FORM is evaluated and the result | |
5245 | is used as a mode line element. | |
5246 | For a list whose car is a symbol, the symbol's value is taken, | |
5247 | and if that is non-nil, the cadr of the list is processed recursively. | |
5248 | Otherwise, the caddr of the list (if there is one) is processed. | |
5249 | For a list whose car is a string or list, each element is processed | |
5250 | recursively and the results are effectively concatenated. | |
5251 | For a list whose car is an integer, the cdr of the list is processed | |
5252 | and padded (if the number is positive) or truncated (if negative) | |
5253 | to the width specified by that number. | |
5254 | A string is printed verbatim in the mode line except for %-constructs: | |
5255 | (%-constructs are allowed when the string is the entire mode-line-format | |
5256 | or when it is found in a cons-cell or a list) | |
5257 | %b -- print buffer name. %f -- print visited file name. | |
5258 | %F -- print frame name. | |
5259 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5260 | %& is like %*, but ignore read-only-ness. | |
5261 | % means buffer is read-only and * means it is modified. | |
5262 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5263 | %s -- print process status. %l -- print the current line number. | |
5264 | %c -- print the current column number (this makes editing slower). | |
5265 | To make the column number update correctly in all cases, | |
5266 | `column-number-mode' must be non-nil. | |
5267 | %p -- print percent of buffer above top of window, or Top, Bot or All. | |
5268 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5269 | or print Bottom or All. | |
5270 | %m -- print the mode name. | |
5271 | %n -- print Narrow if appropriate. | |
5272 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems. | |
5273 | %Z -- like %z, but including the end-of-line format. | |
5274 | %[ -- print one [ for each recursive editing level. %] similar. | |
5275 | %% -- print %. %- -- print infinitely many dashes. | |
5276 | Decimal digits after the % specify field width to which to pad. */); | |
5277 | ||
7ee72033 | 5278 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5279 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
018ba359 | 5280 | nil here means use current buffer's major mode. */); |
1ab256cb RM |
5281 | |
5282 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5283 | make_number (Lisp_Symbol), |
efc7e75f | 5284 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5285 | |
5286 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5287 | Qnil, |
efc7e75f | 5288 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5289 | |
7ee72033 | 5290 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5291 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5292 | |
5293 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5294 | Qnil, |
efc7e75f | 5295 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5296 | |
5297 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5298 | make_number (Lisp_Int), |
efc7e75f | 5299 | doc: /* *Column beyond which automatic line-wrapping should happen. */); |
1ab256cb RM |
5300 | |
5301 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5302 | make_number (Lisp_Int), |
efc7e75f | 5303 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5304 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5305 | |
5306 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5307 | make_number (Lisp_Int), |
efc7e75f | 5308 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5309 | |
7ee72033 | 5310 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5311 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5312 | A value of nil means use backslash and octal digits. |
5313 | This variable does not apply to characters whose display is specified | |
5314 | in the current display table (if there is one). */); | |
1ab256cb | 5315 | |
3b06f880 | 5316 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5317 | ¤t_buffer->enable_multibyte_characters, |
7ee72033 | 5318 | make_number (-1), |
efc7e75f | 5319 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5320 | Otherwise they are regarded as unibyte. This affects the display, |
5321 | file I/O and the behavior of various editing commands. | |
5322 | ||
5323 | This variable is buffer-local but you cannot set it directly; | |
5324 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5325 | Changing its default value with `setq-default' is supported. | |
5326 | See also variable `default-enable-multibyte-characters' and Info node | |
5327 | `(elisp)Text Representations'. */); | |
3b06f880 | 5328 | |
c71b5d9b | 5329 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5330 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5331 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5332 | This variable applies to saving the buffer, and also to `write-region' |
5333 | and other functions that use `write-region'. | |
5334 | It does not apply to sending output to subprocesses, however. | |
5335 | ||
5336 | If this is nil, the buffer is saved without any code conversion | |
5337 | unless some coding system is specified in `file-coding-system-alist' | |
5338 | for the buffer file. | |
5339 | ||
31a6cb06 EZ |
5340 | If the text to be saved cannot be encoded as specified by this variable, |
5341 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5342 | ||
018ba359 PJ |
5343 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5344 | ||
5345 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5346 | |
3b06f880 | 5347 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5348 | Qnil, |
efc7e75f | 5349 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5350 | |
7ee72033 | 5351 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5352 | doc: /* *Non-nil means do not display continuation lines. |
5353 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5354 | |
5355 | Note that this is overridden by the variable | |
5356 | `truncate-partial-width-windows' if that variable is non-nil | |
5357 | and this buffer is not full-frame width. */); | |
1ab256cb | 5358 | |
f7975d07 | 5359 | #ifdef DOS_NT |
54ad07d3 | 5360 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5361 | Qnil, |
efc7e75f | 5362 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5363 | This variable is meaningful on MS-DOG and Windows NT. |
5364 | On those systems, it is automatically local in every buffer. | |
5365 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5366 | #endif |
5367 | ||
1ab256cb | 5368 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5369 | make_number (Lisp_String), |
efc7e75f | 5370 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5371 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5372 | |
5373 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5374 | Qnil, |
efc7e75f | 5375 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5376 | It is called after self-inserting any character specified in |
5377 | the `auto-fill-chars' table. | |
5378 | NOTE: This variable is not a hook; | |
5379 | its value may not be a list of functions. */); | |
1ab256cb RM |
5380 | |
5381 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5382 | make_number (Lisp_String), |
efc7e75f | 5383 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5384 | |
f6ed2e84 | 5385 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5386 | make_number (Lisp_String), |
efc7e75f | 5387 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5388 | The truename of a file is calculated by `file-truename' |
5389 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5390 | |
1ab256cb | 5391 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5392 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5393 | make_number (Lisp_String), |
7614d762 RS |
5394 | doc: /* Name of file for auto-saving current buffer. |
5395 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5396 | |
7ee72033 | 5397 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5398 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5399 | |
7ee72033 | 5400 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5401 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5402 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5403 | |
5404 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5405 | make_number (Lisp_Int), |
efc7e75f | 5406 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5407 | 0 initially. */); |
1ab256cb RM |
5408 | |
5409 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5410 | Qnil, |
7614d762 RS |
5411 | doc: /* Non-nil enables selective display. |
5412 | An Integer N as value means display only lines | |
5413 | that start with less than n columns of space. | |
5414 | A value of t means that the character ^M makes itself and | |
5415 | all the rest of the line invisible; also, when saving the buffer | |
5416 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5417 | |
5418 | #ifndef old | |
5419 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5420 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5421 | Qnil, |
3f676284 | 5422 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5423 | #endif |
5424 | ||
7ee72033 | 5425 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5426 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5427 | The value should be one of `overwrite-mode-textual', |
5428 | `overwrite-mode-binary', or nil. | |
5429 | If it is `overwrite-mode-textual', self-insertion still | |
5430 | inserts at the end of a line, and inserts when point is before a tab, | |
5431 | until the tab is filled in. | |
5432 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5433 | ||
54939090 | 5434 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5435 | Qnil, |
efc7e75f | 5436 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5437 | |
5438 | If this variable is nil, the value of `standard-display-table' is used. | |
5439 | Each window can have its own, overriding display table, see | |
5440 | `set-window-display-table' and `window-display-table'. | |
5441 | ||
5442 | The display table is a char-table created with `make-display-table'. | |
5443 | A char-table is an array indexed by character codes. Normal array | |
5444 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5445 | ||
5446 | Each of the char-table elements control how to display the corresponding | |
5447 | text character: the element at index C in the table says how to display | |
5448 | the character whose code is C. Each element should be a vector of | |
5449 | characters or nil. nil means display the character in the default fashion; | |
5450 | otherwise, the characters from the vector are delivered to the screen | |
5451 | instead of the original character. | |
5452 | ||
5453 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5454 | a capital Y instead of each X character. | |
5455 | ||
5456 | In addition, a char-table has six extra slots to control the display of: | |
5457 | ||
5458 | the end of a truncated screen line (extra-slot 0, a single character); | |
5459 | the end of a continued line (extra-slot 1, a single character); | |
5460 | the escape character used to display character codes in octal | |
5461 | (extra-slot 2, a single character); | |
5462 | the character used as an arrow for control characters (extra-slot 3, | |
5463 | a single character); | |
5464 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5465 | a vector of characters); | |
5466 | the character used to draw the border between side-by-side windows | |
5467 | (extra-slot 5, a single character). | |
5468 | ||
5469 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5470 | |
0552666b | 5471 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
7ee72033 | 5472 | Qnil, |
efc7e75f | 5473 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5474 | A value of nil means no marginal area. */); |
0552666b GM |
5475 | |
5476 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
7ee72033 | 5477 | Qnil, |
efc7e75f | 5478 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5479 | A value of nil means no marginal area. */); |
0552666b GM |
5480 | |
5481 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
7ee72033 | 5482 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5483 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5484 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5485 | window-systems. */); | |
0552666b GM |
5486 | |
5487 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
7ee72033 | 5488 | ¤t_buffer->scroll_up_aggressively, Qnil, |
efc7e75f | 5489 | doc: /* *If a number, scroll display up aggressively. |
6524d955 | 5490 | If scrolling a window because point is below the window end, choose |
018ba359 | 5491 | a new window start so that point ends up that fraction of the window's |
6524d955 | 5492 | height from the bottom of the window. */); |
0552666b GM |
5493 | |
5494 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
7ee72033 | 5495 | ¤t_buffer->scroll_down_aggressively, Qnil, |
efc7e75f | 5496 | doc: /* *If a number, scroll display down aggressively. |
6524d955 | 5497 | If scrolling a window because point is above the window start, choose |
018ba359 | 5498 | a new window start so that point ends up that fraction of the window's |
6524d955 | 5499 | height from the top of the window. */); |
0552666b | 5500 | |
1ab256cb RM |
5501 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5502 | "Don't ask."); | |
5503 | */ | |
1ab256cb | 5504 | |
7ee72033 MB |
5505 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5506 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5507 | Two arguments are passed to each function: the positions of |
5508 | the beginning and end of the range of old text to be changed. | |
5509 | \(For an insertion, the beginning and end are at the same place.) | |
5510 | No information is given about the length of the text after the change. | |
5511 | ||
5512 | Buffer changes made while executing the `before-change-functions' | |
5513 | don't call any before-change or after-change functions. | |
5514 | That's because these variables are temporarily set to nil. | |
5515 | As a result, a hook function cannot straightforwardly alter the value of | |
5516 | these variables. See the Emacs Lisp manual for a way of | |
5517 | accomplishing an equivalent result by using other variables. | |
5518 | ||
5519 | If an unhandled error happens in running these functions, | |
5520 | the variable's value remains nil. That prevents the error | |
5521 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5522 | Vbefore_change_functions = Qnil; |
5523 | ||
7ee72033 | 5524 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5525 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5526 | Three arguments are passed to each function: the positions of |
5527 | the beginning and end of the range of changed text, | |
5528 | and the length in bytes of the pre-change text replaced by that range. | |
5529 | \(For an insertion, the pre-change length is zero; | |
5530 | for a deletion, that length is the number of bytes deleted, | |
5531 | and the post-change beginning and end are at the same place.) | |
5532 | ||
5533 | Buffer changes made while executing the `after-change-functions' | |
5534 | don't call any before-change or after-change functions. | |
5535 | That's because these variables are temporarily set to nil. | |
5536 | As a result, a hook function cannot straightforwardly alter the value of | |
5537 | these variables. See the Emacs Lisp manual for a way of | |
5538 | accomplishing an equivalent result by using other variables. | |
5539 | ||
5540 | If an unhandled error happens in running these functions, | |
5541 | the variable's value remains nil. That prevents the error | |
5542 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5543 | Vafter_change_functions = Qnil; |
5544 | ||
7ee72033 | 5545 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5546 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5547 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5548 | Vfirst_change_hook = Qnil; |
1ab256cb | 5549 | |
7ee72033 MB |
5550 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5551 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5552 | Recent changes come first; older changes follow newer. |
5553 | ||
5554 | An entry (BEG . END) represents an insertion which begins at | |
5555 | position BEG and ends at position END. | |
5556 | ||
5557 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5558 | from (abs POSITION). If POSITION is positive, point was at the front | |
5559 | of the text being deleted; if negative, point was at the end. | |
5560 | ||
5561 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5562 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5563 | of the visited file's modification time, as of that time. If the | |
5564 | modification time of the most recent save is different, this entry is | |
5565 | obsolete. | |
5566 | ||
5567 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5568 | was modified between BEG and END. PROPERTY is the property name, | |
5569 | and VALUE is the old value. | |
5570 | ||
5571 | An entry (MARKER . DISTANCE) indicates that the marker MARKER | |
5572 | was adjusted in position by the offset DISTANCE (an integer). | |
5573 | ||
5574 | An entry of the form POSITION indicates that point was at the buffer | |
5575 | location given by the integer. Undoing an entry of this form places | |
5576 | point at POSITION. | |
5577 | ||
5578 | nil marks undo boundaries. The undo command treats the changes | |
5579 | between two undo boundaries as a single step to be undone. | |
5580 | ||
5581 | If the value of the variable is t, undo information is not recorded. */); | |
5582 | ||
7ee72033 MB |
5583 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5584 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5585 | |
7ee72033 MB |
5586 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5587 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5588 | |
5589 | Normally, the line-motion functions work by scanning the buffer for | |
5590 | newlines. Columnar operations (like move-to-column and | |
5591 | compute-motion) also work by scanning the buffer, summing character | |
5592 | widths as they go. This works well for ordinary text, but if the | |
5593 | buffer's lines are very long (say, more than 500 characters), these | |
5594 | motion functions will take longer to execute. Emacs may also take | |
5595 | longer to update the display. | |
5596 | ||
5597 | If cache-long-line-scans is non-nil, these motion functions cache the | |
5598 | results of their scans, and consult the cache to avoid rescanning | |
5599 | regions of the buffer until the text is modified. The caches are most | |
5600 | beneficial when they prevent the most searching---that is, when the | |
5601 | buffer contains long lines and large regions of characters with the | |
5602 | same, fixed screen width. | |
5603 | ||
5604 | When cache-long-line-scans is non-nil, processing short lines will | |
5605 | become slightly slower (because of the overhead of consulting the | |
5606 | cache), and the caches will use memory roughly proportional to the | |
5607 | number of newlines and characters whose screen width varies. | |
5608 | ||
5609 | The caches require no explicit maintenance; their accuracy is | |
5610 | maintained internally by the Emacs primitives. Enabling or disabling | |
5611 | the cache should not affect the behavior of any of the motion | |
5612 | functions; it should only affect their performance. */); | |
5613 | ||
7ee72033 MB |
5614 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5615 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5616 | |
7ee72033 MB |
5617 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5618 | doc: /* List of formats to use when saving this buffer. | |
018ba359 PJ |
5619 | Formats are defined by `format-alist'. This variable is |
5620 | set when a file is visited. Automatically local in all buffers. */); | |
be9aafdd | 5621 | |
3cb719bd | 5622 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5623 | ¤t_buffer->invisibility_spec, Qnil, |
5624 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5625 | The default is t, which means that text is invisible |
5626 | if it has a non-nil `invisible' property. | |
5627 | If the value is a list, a text character is invisible if its `invisible' | |
5628 | property is an element in that list. | |
5629 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5630 | then characters with property value PROP are invisible, | |
5631 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5632 | |
7962a441 | 5633 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5634 | ¤t_buffer->display_count, Qnil, |
5635 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5636 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5637 | |
5638 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5639 | ¤t_buffer->display_time, Qnil, |
5640 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5641 | The function `set-window-buffer' updates this variable |
5642 | to the value obtained by calling `current-time'. | |
5643 | If the buffer has never been shown in a window, the value is nil. */); | |
5644 | ||
7ee72033 MB |
5645 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5646 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5647 | Non-nil also enables highlighting of the region whenever the mark is active. |
5648 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5649 | all windows or just the selected window. */); | |
c48f61ef RS |
5650 | Vtransient_mark_mode = Qnil; |
5651 | ||
7ee72033 MB |
5652 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
5653 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
5654 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5655 | text properties. If the value is a list, disregard `buffer-read-only' | |
5656 | and disregard a `read-only' text property if the property value | |
5657 | is a member of the list. */); | |
a96b68f1 RS |
5658 | Vinhibit_read_only = Qnil; |
5659 | ||
7ee72033 | 5660 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 5661 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5662 | Values are interpreted as follows: |
5663 | ||
cd8d5236 RS |
5664 | t use the cursor specified for the frame |
5665 | nil don't display a cursor | |
5666 | bar display a bar cursor with default width | |
5667 | (bar . WIDTH) display a bar cursor with width WIDTH | |
5668 | ANYTHING ELSE display a box cursor. | |
5669 | ||
5670 | When the buffer is displayed in a nonselected window, | |
5671 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 5672 | |
a3bbced0 | 5673 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
5674 | ¤t_buffer->extra_line_spacing, Qnil, |
5675 | doc: /* Additional space to put between lines when displaying a buffer. | |
018ba359 | 5676 | The space is measured in pixels, and put below lines on window systems. */); |
a3bbced0 | 5677 | |
7ee72033 | 5678 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 5679 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
5680 | Vkill_buffer_query_functions = Qnil; |
5681 | ||
0dc88e60 | 5682 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5683 | defsubr (&Sbuffer_list); |
5684 | defsubr (&Sget_buffer); | |
5685 | defsubr (&Sget_file_buffer); | |
5686 | defsubr (&Sget_buffer_create); | |
336cd056 | 5687 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5688 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5689 | defsubr (&Sbuffer_name); |
5690 | /*defsubr (&Sbuffer_number);*/ | |
5691 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5692 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 5693 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
5694 | defsubr (&Sbuffer_local_variables); |
5695 | defsubr (&Sbuffer_modified_p); | |
5696 | defsubr (&Sset_buffer_modified_p); | |
5697 | defsubr (&Sbuffer_modified_tick); | |
5698 | defsubr (&Srename_buffer); | |
5699 | defsubr (&Sother_buffer); | |
5700 | defsubr (&Sbuffer_disable_undo); | |
5701 | defsubr (&Sbuffer_enable_undo); | |
5702 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5703 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5704 | defsubr (&Sswitch_to_buffer); |
5705 | defsubr (&Spop_to_buffer); | |
5706 | defsubr (&Scurrent_buffer); | |
5707 | defsubr (&Sset_buffer); | |
5708 | defsubr (&Sbarf_if_buffer_read_only); | |
5709 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5710 | defsubr (&Serase_buffer); |
5711 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5712 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5713 | |
52f8ec73 | 5714 | defsubr (&Soverlayp); |
2eec3b4e RS |
5715 | defsubr (&Smake_overlay); |
5716 | defsubr (&Sdelete_overlay); | |
5717 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5718 | defsubr (&Soverlay_start); |
5719 | defsubr (&Soverlay_end); | |
5720 | defsubr (&Soverlay_buffer); | |
5721 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5722 | defsubr (&Soverlays_at); |
74514898 | 5723 | defsubr (&Soverlays_in); |
2eec3b4e | 5724 | defsubr (&Snext_overlay_change); |
239c932b | 5725 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
5726 | defsubr (&Soverlay_recenter); |
5727 | defsubr (&Soverlay_lists); | |
5728 | defsubr (&Soverlay_get); | |
5729 | defsubr (&Soverlay_put); | |
a8c21b48 | 5730 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
5731 | } |
5732 | ||
dfcf069d | 5733 | void |
1ab256cb RM |
5734 | keys_of_buffer () |
5735 | { | |
5736 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
5737 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
5738 | |
5739 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
5740 | initialized when that function gets called. */ | |
5741 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 5742 | } |