Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
53fe786d | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999 |
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 RM |
21 | |
22 | ||
2381d133 JB |
23 | #include <sys/types.h> |
24 | #include <sys/stat.h> | |
1ab256cb | 25 | #include <sys/param.h> |
9dde47f5 RS |
26 | #include <errno.h> |
27 | ||
28 | extern int errno; | |
1ab256cb RM |
29 | |
30 | #ifndef MAXPATHLEN | |
31 | /* in 4.1, param.h fails to define this. */ | |
32 | #define MAXPATHLEN 1024 | |
33 | #endif /* not MAXPATHLEN */ | |
34 | ||
18160b98 | 35 | #include <config.h> |
dfcf069d AS |
36 | #ifdef STDC_HEADERS |
37 | #include <stdlib.h> | |
38 | #endif | |
39 | #ifdef HAVE_UNISTD_H | |
40 | #include <unistd.h> | |
41 | #endif | |
1ab256cb | 42 | #include "lisp.h" |
21cf4cf8 | 43 | #include "intervals.h" |
1ab256cb RM |
44 | #include "window.h" |
45 | #include "commands.h" | |
46 | #include "buffer.h" | |
3b06f880 | 47 | #include "charset.h" |
28e969dd | 48 | #include "region-cache.h" |
1ab256cb | 49 | #include "indent.h" |
d014bf88 | 50 | #include "blockinput.h" |
08460cd4 | 51 | #include "frame.h" |
1ab256cb RM |
52 | |
53 | struct buffer *current_buffer; /* the current buffer */ | |
54 | ||
55 | /* First buffer in chain of all buffers (in reverse order of creation). | |
56 | Threaded through ->next. */ | |
57 | ||
58 | struct buffer *all_buffers; | |
59 | ||
60 | /* This structure holds the default values of the buffer-local variables | |
61 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
62 | The default value occupies the same slot in this structure | |
63 | as an individual buffer's value occupies in that buffer. | |
64 | Setting the default value also goes through the alist of buffers | |
65 | and stores into each buffer that does not say it has a local value. */ | |
66 | ||
67 | struct buffer buffer_defaults; | |
68 | ||
69 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
70 | ||
71 | static Lisp_Object Vbuffer_defaults; | |
72 | ||
73 | /* This structure marks which slots in a buffer have corresponding | |
74 | default values in buffer_defaults. | |
75 | Each such slot has a nonzero value in this structure. | |
76 | The value has only one nonzero bit. | |
77 | ||
78 | When a buffer has its own local value for a slot, | |
79 | the bit for that slot (found in the same slot in this structure) | |
80 | is turned on in the buffer's local_var_flags slot. | |
81 | ||
82 | If a slot in this structure is -1, then even though there may | |
83 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
84 | and the corresponding slot in buffer_defaults is not used. | |
85 | ||
86 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
87 | but there is a default value which is copied into each buffer. | |
88 | ||
89 | If a slot in this structure is negative, then even though there may | |
90 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
91 | and the corresponding slot in buffer_defaults is not used. | |
92 | ||
93 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
94 | zero, that is a bug */ | |
95 | ||
96 | struct buffer buffer_local_flags; | |
97 | ||
98 | /* This structure holds the names of symbols whose values may be | |
99 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
100 | ||
101 | struct buffer buffer_local_symbols; | |
102 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
103 | static Lisp_Object Vbuffer_local_symbols; | |
104 | ||
0fa3ba92 JB |
105 | /* This structure holds the required types for the values in the |
106 | buffer-local slots. If a slot contains Qnil, then the | |
107 | corresponding buffer slot may contain a value of any type. If a | |
108 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
109 | equal to that integer (except nil is always allowed). |
110 | When a tag does not match, the function | |
111 | buffer_slot_type_mismatch will signal an error. | |
112 | ||
113 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
114 | struct buffer buffer_local_types; |
115 | ||
13de9290 RS |
116 | /* Flags indicating which built-in buffer-local variables |
117 | are permanent locals. */ | |
118 | static int buffer_permanent_local_flags; | |
119 | ||
1ab256cb | 120 | Lisp_Object Fset_buffer (); |
01050cb5 | 121 | void set_buffer_internal (); |
c7aa5005 | 122 | void set_buffer_internal_1 (); |
173f2a64 | 123 | static void call_overlay_mod_hooks (); |
2f3f993b | 124 | static void swap_out_buffer_local_variables (); |
13de9290 | 125 | static void reset_buffer_local_variables (); |
1ab256cb RM |
126 | |
127 | /* Alist of all buffer names vs the buffers. */ | |
128 | /* This used to be a variable, but is no longer, | |
129 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
130 | Lisp_Object Vbuffer_alist; | |
131 | ||
132 | /* Functions to call before and after each text change. */ | |
133 | Lisp_Object Vbefore_change_function; | |
134 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
135 | Lisp_Object Vbefore_change_functions; |
136 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 137 | |
c48f61ef RS |
138 | Lisp_Object Vtransient_mark_mode; |
139 | ||
a96b68f1 RS |
140 | /* t means ignore all read-only text properties. |
141 | A list means ignore such a property if its value is a member of the list. | |
142 | Any non-nil value means ignore buffer-read-only. */ | |
143 | Lisp_Object Vinhibit_read_only; | |
144 | ||
dcdffbf6 RS |
145 | /* List of functions to call that can query about killing a buffer. |
146 | If any of these functions returns nil, we don't kill it. */ | |
147 | Lisp_Object Vkill_buffer_query_functions; | |
148 | ||
dbc4e1c1 JB |
149 | /* List of functions to call before changing an unmodified buffer. */ |
150 | Lisp_Object Vfirst_change_hook; | |
22378665 | 151 | |
dbc4e1c1 | 152 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
153 | Lisp_Object Qbefore_change_functions; |
154 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 155 | |
7775635d KH |
156 | /* If nonzero, all modification hooks are suppressed. */ |
157 | int inhibit_modification_hooks; | |
158 | ||
1ab256cb RM |
159 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
160 | ||
161 | Lisp_Object Qprotected_field; | |
162 | ||
163 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
164 | ||
165 | Lisp_Object Qkill_buffer_hook; | |
166 | ||
5fe0b67e RS |
167 | Lisp_Object Qget_file_buffer; |
168 | ||
52f8ec73 JB |
169 | Lisp_Object Qoverlayp; |
170 | ||
bbbe9545 | 171 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 172 | |
294d215f RS |
173 | Lisp_Object Qmodification_hooks; |
174 | Lisp_Object Qinsert_in_front_hooks; | |
175 | Lisp_Object Qinsert_behind_hooks; | |
176 | ||
1ab256cb RM |
177 | /* For debugging; temporary. See set_buffer_internal. */ |
178 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
179 | ||
01136e9b | 180 | void |
1ab256cb RM |
181 | nsberror (spec) |
182 | Lisp_Object spec; | |
183 | { | |
a7a60ce9 | 184 | if (STRINGP (spec)) |
1ab256cb RM |
185 | error ("No buffer named %s", XSTRING (spec)->data); |
186 | error ("Invalid buffer argument"); | |
187 | } | |
188 | \f | |
0dc88e60 RS |
189 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
190 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ | |
191 | Value is nil if OBJECT is not a buffer or if it has been killed.") | |
192 | (object) | |
193 | Lisp_Object object; | |
194 | { | |
195 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
196 | ? Qt : Qnil); | |
197 | } | |
198 | ||
08460cd4 RS |
199 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
200 | "Return a list of all existing live buffers.\n\ | |
201 | If the optional arg FRAME is a frame, we return that frame's buffer list.") | |
202 | (frame) | |
203 | Lisp_Object frame; | |
1ab256cb | 204 | { |
08460cd4 RS |
205 | Lisp_Object framelist, general; |
206 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
207 | ||
208 | if (FRAMEP (frame)) | |
209 | { | |
210 | Lisp_Object tail; | |
211 | ||
212 | CHECK_FRAME (frame, 1); | |
213 | ||
214 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
215 | ||
216 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
217 | tail = framelist; | |
218 | while (! NILP (tail)) | |
219 | { | |
220 | general = Fdelq (XCONS (tail)->car, general); | |
221 | tail = XCONS (tail)->cdr; | |
222 | } | |
223 | return nconc2 (framelist, general); | |
224 | } | |
225 | ||
226 | return general; | |
1ab256cb RM |
227 | } |
228 | ||
04ae1b48 RS |
229 | /* Like Fassoc, but use Fstring_equal to compare |
230 | (which ignores text properties), | |
231 | and don't ever QUIT. */ | |
232 | ||
233 | static Lisp_Object | |
234 | assoc_ignore_text_properties (key, list) | |
235 | register Lisp_Object key; | |
236 | Lisp_Object list; | |
237 | { | |
238 | register Lisp_Object tail; | |
239 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
240 | { | |
241 | register Lisp_Object elt, tem; | |
242 | elt = Fcar (tail); | |
243 | tem = Fstring_equal (Fcar (elt), key); | |
244 | if (!NILP (tem)) | |
245 | return elt; | |
246 | } | |
247 | return Qnil; | |
248 | } | |
249 | ||
1ab256cb RM |
250 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
251 | "Return the buffer named NAME (a string).\n\ | |
252 | If there is no live buffer named NAME, return nil.\n\ | |
253 | NAME may also be a buffer; if so, the value is that buffer.") | |
254 | (name) | |
255 | register Lisp_Object name; | |
256 | { | |
a7a60ce9 | 257 | if (BUFFERP (name)) |
1ab256cb RM |
258 | return name; |
259 | CHECK_STRING (name, 0); | |
260 | ||
04ae1b48 | 261 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
262 | } |
263 | ||
264 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
265 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 266 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
267 | If there is no such live buffer, return nil.\n\ |
268 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
269 | (filename) |
270 | register Lisp_Object filename; | |
271 | { | |
272 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
273 | Lisp_Object handler; |
274 | ||
1ab256cb RM |
275 | CHECK_STRING (filename, 0); |
276 | filename = Fexpand_file_name (filename, Qnil); | |
277 | ||
5fe0b67e RS |
278 | /* If the file name has special constructs in it, |
279 | call the corresponding file handler. */ | |
a617e913 | 280 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
281 | if (!NILP (handler)) |
282 | return call2 (handler, Qget_file_buffer, filename); | |
283 | ||
1ab256cb RM |
284 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
285 | { | |
286 | buf = Fcdr (XCONS (tail)->car); | |
a7a60ce9 KH |
287 | if (!BUFFERP (buf)) continue; |
288 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 289 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 290 | if (!NILP (tem)) |
1ab256cb RM |
291 | return buf; |
292 | } | |
293 | return Qnil; | |
294 | } | |
295 | ||
52e01189 RS |
296 | Lisp_Object |
297 | get_truename_buffer (filename) | |
298 | register Lisp_Object filename; | |
299 | { | |
300 | register Lisp_Object tail, buf, tem; | |
301 | ||
302 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
303 | { | |
304 | buf = Fcdr (XCONS (tail)->car); | |
305 | if (!BUFFERP (buf)) continue; | |
306 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
307 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
308 | if (!NILP (tem)) | |
309 | return buf; | |
310 | } | |
311 | return Qnil; | |
312 | } | |
313 | ||
1ab256cb RM |
314 | /* Incremented for each buffer created, to assign the buffer number. */ |
315 | int buffer_count; | |
316 | ||
317 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
318 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
319 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 320 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
321 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
322 | The value is never nil.") | |
323 | (name) | |
324 | register Lisp_Object name; | |
325 | { | |
a9ee7a59 | 326 | register Lisp_Object buf; |
1ab256cb RM |
327 | register struct buffer *b; |
328 | ||
329 | buf = Fget_buffer (name); | |
265a9e55 | 330 | if (!NILP (buf)) |
1ab256cb RM |
331 | return buf; |
332 | ||
31cd83e9 KH |
333 | if (XSTRING (name)->size == 0) |
334 | error ("Empty string for buffer name is not allowed"); | |
335 | ||
9ac0d9e0 | 336 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb | 337 | |
336cd056 RS |
338 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
339 | ||
340 | /* An ordinary buffer uses its own struct buffer_text. */ | |
341 | b->text = &b->own_text; | |
342 | b->base_buffer = 0; | |
343 | ||
1ab256cb | 344 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 345 | BLOCK_INPUT; |
3b06f880 KH |
346 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
347 | anchoring a search. */ | |
348 | BUFFER_ALLOC (BUF_BEG_ADDR (b), (BUF_GAP_SIZE (b) + 1)); | |
9ac0d9e0 | 349 | UNBLOCK_INPUT; |
1ab256cb | 350 | if (! BUF_BEG_ADDR (b)) |
81841847 | 351 | buffer_memory_full (); |
1ab256cb RM |
352 | |
353 | BUF_PT (b) = 1; | |
354 | BUF_GPT (b) = 1; | |
355 | BUF_BEGV (b) = 1; | |
356 | BUF_ZV (b) = 1; | |
357 | BUF_Z (b) = 1; | |
3f236a40 RS |
358 | BUF_PT_BYTE (b) = 1; |
359 | BUF_GPT_BYTE (b) = 1; | |
360 | BUF_BEGV_BYTE (b) = 1; | |
361 | BUF_ZV_BYTE (b) = 1; | |
362 | BUF_Z_BYTE (b) = 1; | |
1ab256cb | 363 | BUF_MODIFF (b) = 1; |
2509d356 | 364 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
365 | BUF_SAVE_MODIFF (b) = 1; |
366 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
367 | BUF_UNCHANGED_MODIFIED (b) = 1; |
368 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
369 | BUF_END_UNCHANGED (b) = 0; | |
370 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 371 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 372 | |
28e969dd JB |
373 | b->newline_cache = 0; |
374 | b->width_run_cache = 0; | |
375 | b->width_table = Qnil; | |
0552666b | 376 | b->minibuffer_prompt_length = Qnil; |
b5a225b4 | 377 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 378 | |
1ab256cb RM |
379 | /* Put this on the chain of all buffers including killed ones. */ |
380 | b->next = all_buffers; | |
381 | all_buffers = b; | |
382 | ||
336cd056 RS |
383 | /* An ordinary buffer normally doesn't need markers |
384 | to handle BEGV and ZV. */ | |
385 | b->pt_marker = Qnil; | |
386 | b->begv_marker = Qnil; | |
387 | b->zv_marker = Qnil; | |
04ae1b48 RS |
388 | |
389 | name = Fcopy_sequence (name); | |
390 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 391 | b->name = name; |
04ae1b48 | 392 | |
1ab256cb RM |
393 | if (XSTRING (name)->data[0] != ' ') |
394 | b->undo_list = Qnil; | |
395 | else | |
396 | b->undo_list = Qt; | |
397 | ||
398 | reset_buffer (b); | |
13de9290 | 399 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
400 | |
401 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 402 | XSETBUFFER (buf, b); |
1ab256cb RM |
403 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
404 | ||
405 | b->mark = Fmake_marker (); | |
336cd056 RS |
406 | BUF_MARKERS (b) = Qnil; |
407 | b->name = name; | |
408 | return buf; | |
409 | } | |
410 | ||
a2428fa2 | 411 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
193c3837 | 412 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
413 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
414 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
9e552710 RS |
415 | NAME should be a string which is not the name of an existing buffer.") |
416 | (base_buffer, name) | |
417 | register Lisp_Object base_buffer, name; | |
336cd056 RS |
418 | { |
419 | register Lisp_Object buf; | |
420 | register struct buffer *b; | |
421 | ||
422 | buf = Fget_buffer (name); | |
423 | if (!NILP (buf)) | |
424 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
425 | ||
426 | base_buffer = Fget_buffer (base_buffer); | |
427 | if (NILP (base_buffer)) | |
428 | error ("No such buffer: `%s'", | |
429 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
430 | ||
431 | if (XSTRING (name)->size == 0) | |
432 | error ("Empty string for buffer name is not allowed"); | |
433 | ||
434 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
435 | ||
436 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
437 | ||
438 | if (XBUFFER (base_buffer)->base_buffer) | |
439 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
440 | else | |
441 | b->base_buffer = XBUFFER (base_buffer); | |
442 | ||
443 | /* Use the base buffer's text object. */ | |
444 | b->text = b->base_buffer->text; | |
445 | ||
446 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
447 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
448 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
449 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
450 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
451 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
452 | |
453 | b->newline_cache = 0; | |
454 | b->width_run_cache = 0; | |
455 | b->width_table = Qnil; | |
0552666b | 456 | b->minibuffer_prompt_length = Qnil; |
336cd056 RS |
457 | |
458 | /* Put this on the chain of all buffers including killed ones. */ | |
459 | b->next = all_buffers; | |
460 | all_buffers = b; | |
461 | ||
462 | name = Fcopy_sequence (name); | |
463 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
464 | b->name = name; | |
465 | ||
466 | reset_buffer (b); | |
13de9290 | 467 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
468 | |
469 | /* Put this in the alist of all live buffers. */ | |
470 | XSETBUFFER (buf, b); | |
471 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
472 | ||
473 | b->mark = Fmake_marker (); | |
1ab256cb | 474 | b->name = name; |
336cd056 | 475 | |
abc9d959 RS |
476 | /* The multibyte status belongs to the base buffer. */ |
477 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
478 | ||
336cd056 RS |
479 | /* Make sure the base buffer has markers for its narrowing. */ |
480 | if (NILP (b->base_buffer->pt_marker)) | |
481 | { | |
482 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
483 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
484 | BUF_PT (b->base_buffer), | |
485 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
486 | } |
487 | if (NILP (b->base_buffer->begv_marker)) | |
488 | { | |
489 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
490 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
491 | BUF_BEGV (b->base_buffer), | |
492 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
493 | } |
494 | if (NILP (b->base_buffer->zv_marker)) | |
495 | { | |
496 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
497 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
498 | BUF_ZV (b->base_buffer), | |
499 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 500 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
501 | } |
502 | ||
503 | /* Give the indirect buffer markers for its narrowing. */ | |
ea064aa0 | 504 | b->pt_marker = Fmake_marker (); |
3f236a40 | 505 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); |
ea064aa0 | 506 | b->begv_marker = Fmake_marker (); |
3f236a40 | 507 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); |
ea064aa0 | 508 | b->zv_marker = Fmake_marker (); |
3f236a40 | 509 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); |
26d84681 | 510 | XMARKER (b->zv_marker)->insertion_type = 1; |
336cd056 | 511 | |
a9ee7a59 | 512 | return buf; |
1ab256cb RM |
513 | } |
514 | ||
bcd40520 RS |
515 | /* Reinitialize everything about a buffer except its name and contents |
516 | and local variables. */ | |
1ab256cb RM |
517 | |
518 | void | |
519 | reset_buffer (b) | |
520 | register struct buffer *b; | |
521 | { | |
522 | b->filename = Qnil; | |
f6ed2e84 | 523 | b->file_truename = Qnil; |
1ab256cb RM |
524 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
525 | b->modtime = 0; | |
8d7a4592 | 526 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 527 | b->last_window_start = 1; |
8b264726 | 528 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
529 | b->clip_changed = 0; |
530 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
531 | b->backed_up = Qnil; |
532 | b->auto_save_modified = 0; | |
84f6bcba | 533 | b->auto_save_failure_time = -1; |
1ab256cb RM |
534 | b->auto_save_file_name = Qnil; |
535 | b->read_only = Qnil; | |
2eec3b4e RS |
536 | b->overlays_before = Qnil; |
537 | b->overlays_after = Qnil; | |
8d7a4592 | 538 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 539 | b->mark_active = Qnil; |
943e065b | 540 | b->point_before_scroll = Qnil; |
be9aafdd | 541 | b->file_format = Qnil; |
0dc6f165 | 542 | b->last_selected_window = Qnil; |
7962a441 | 543 | XSETINT (b->display_count, 0); |
3fd364db | 544 | b->display_time = Qnil; |
fb2030e3 RS |
545 | b->extra2 = Qnil; |
546 | b->extra3 = Qnil; | |
1bf08baf | 547 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
1ab256cb RM |
548 | } |
549 | ||
bcd40520 RS |
550 | /* Reset buffer B's local variables info. |
551 | Don't use this on a buffer that has already been in use; | |
552 | it does not treat permanent locals consistently. | |
13de9290 RS |
553 | Instead, use Fkill_all_local_variables. |
554 | ||
555 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
556 | buffer-local variables. If PERMANENT_TOO is 0, | |
557 | we preserve those. */ | |
bcd40520 | 558 | |
13de9290 RS |
559 | static void |
560 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 561 | register struct buffer *b; |
13de9290 | 562 | int permanent_too; |
1ab256cb RM |
563 | { |
564 | register int offset; | |
13de9290 RS |
565 | int dont_reset; |
566 | ||
567 | /* Decide which built-in local variables to reset. */ | |
568 | if (permanent_too) | |
569 | dont_reset = 0; | |
570 | else | |
571 | dont_reset = buffer_permanent_local_flags; | |
1ab256cb RM |
572 | |
573 | /* Reset the major mode to Fundamental, together with all the | |
574 | things that depend on the major mode. | |
575 | default-major-mode is handled at a higher level. | |
576 | We ignore it here. */ | |
577 | b->major_mode = Qfundamental_mode; | |
578 | b->keymap = Qnil; | |
579 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
580 | b->mode_name = QSFundamental; | |
581 | b->minor_modes = Qnil; | |
3446af9c RS |
582 | |
583 | /* If the standard case table has been altered and invalidated, | |
584 | fix up its insides first. */ | |
585 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
586 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
587 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
588 | Fset_standard_case_table (Vascii_downcase_table); | |
589 | ||
1ab256cb | 590 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
591 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
592 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
593 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 594 | b->invisibility_spec = Qt; |
2e716096 RS |
595 | #ifndef DOS_NT |
596 | b->buffer_file_type = Qnil; | |
597 | #endif | |
3cb719bd | 598 | |
1ab256cb RM |
599 | #if 0 |
600 | b->sort_table = XSTRING (Vascii_sort_table); | |
601 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
602 | #endif /* 0 */ | |
603 | ||
13de9290 | 604 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 605 | b->local_var_alist = Qnil; |
13de9290 | 606 | b->local_var_flags &= dont_reset; |
1ab256cb RM |
607 | |
608 | /* For each slot that has a default value, | |
609 | copy that into the slot. */ | |
610 | ||
611 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
612 | offset < sizeof (struct buffer); | |
4d2f1389 | 613 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
614 | { |
615 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
13de9290 RS |
616 | if ((flag > 0 |
617 | /* Don't reset a permanent local. */ | |
618 | && ! (dont_reset & flag)) | |
619 | || flag == -2) | |
620 | *(Lisp_Object *)(offset + (char *)b) | |
621 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
aab80822 | 622 | } |
1ab256cb RM |
623 | } |
624 | ||
01050cb5 RM |
625 | /* We split this away from generate-new-buffer, because rename-buffer |
626 | and set-visited-file-name ought to be able to use this to really | |
627 | rename the buffer properly. */ | |
628 | ||
629 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 630 | 1, 2, 0, |
01050cb5 RM |
631 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
632 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 633 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 634 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 635 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 636 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 637 | even if a buffer with that name exists.") |
c273e647 RS |
638 | (name, ignore) |
639 | register Lisp_Object name, ignore; | |
1ab256cb RM |
640 | { |
641 | register Lisp_Object gentemp, tem; | |
642 | int count; | |
643 | char number[10]; | |
644 | ||
645 | CHECK_STRING (name, 0); | |
646 | ||
647 | tem = Fget_buffer (name); | |
265a9e55 | 648 | if (NILP (tem)) |
01050cb5 | 649 | return name; |
1ab256cb RM |
650 | |
651 | count = 1; | |
652 | while (1) | |
653 | { | |
654 | sprintf (number, "<%d>", ++count); | |
655 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 656 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
657 | if (!NILP (tem)) |
658 | return gentemp; | |
1ab256cb | 659 | tem = Fget_buffer (gentemp); |
265a9e55 | 660 | if (NILP (tem)) |
01050cb5 | 661 | return gentemp; |
1ab256cb RM |
662 | } |
663 | } | |
664 | ||
665 | \f | |
666 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
667 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 668 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
669 | (buffer) |
670 | register Lisp_Object buffer; | |
671 | { | |
265a9e55 | 672 | if (NILP (buffer)) |
1ab256cb RM |
673 | return current_buffer->name; |
674 | CHECK_BUFFER (buffer, 0); | |
675 | return XBUFFER (buffer)->name; | |
676 | } | |
677 | ||
678 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
679 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
680 | No argument or nil as argument means use the current buffer.") | |
681 | (buffer) | |
682 | register Lisp_Object buffer; | |
683 | { | |
265a9e55 | 684 | if (NILP (buffer)) |
1ab256cb RM |
685 | return current_buffer->filename; |
686 | CHECK_BUFFER (buffer, 0); | |
687 | return XBUFFER (buffer)->filename; | |
688 | } | |
689 | ||
336cd056 RS |
690 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
691 | 0, 1, 0, | |
692 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
693 | If BUFFER is not indirect, return nil.") | |
694 | (buffer) | |
695 | register Lisp_Object buffer; | |
696 | { | |
697 | struct buffer *base; | |
698 | Lisp_Object base_buffer; | |
699 | ||
700 | if (NILP (buffer)) | |
701 | base = current_buffer->base_buffer; | |
702 | else | |
703 | { | |
704 | CHECK_BUFFER (buffer, 0); | |
705 | base = XBUFFER (buffer)->base_buffer; | |
706 | } | |
707 | ||
708 | if (! base) | |
709 | return Qnil; | |
710 | XSETBUFFER (base_buffer, base); | |
711 | return base_buffer; | |
712 | } | |
713 | ||
1ab256cb RM |
714 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
715 | Sbuffer_local_variables, 0, 1, 0, | |
716 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
717 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
718 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
719 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
720 | No argument or nil as argument means use current buffer as BUFFER.") | |
721 | (buffer) | |
722 | register Lisp_Object buffer; | |
723 | { | |
724 | register struct buffer *buf; | |
553defa4 | 725 | register Lisp_Object result; |
1ab256cb | 726 | |
265a9e55 | 727 | if (NILP (buffer)) |
1ab256cb RM |
728 | buf = current_buffer; |
729 | else | |
730 | { | |
731 | CHECK_BUFFER (buffer, 0); | |
732 | buf = XBUFFER (buffer); | |
733 | } | |
734 | ||
553defa4 RS |
735 | result = Qnil; |
736 | ||
1ab256cb | 737 | { |
553defa4 RS |
738 | register Lisp_Object tail; |
739 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 740 | { |
553defa4 RS |
741 | Lisp_Object val, elt; |
742 | ||
743 | elt = XCONS (tail)->car; | |
744 | ||
e0585c64 RS |
745 | /* Reference each variable in the alist in buf. |
746 | If inquiring about the current buffer, this gets the current values, | |
747 | so store them into the alist so the alist is up to date. | |
748 | If inquiring about some other buffer, this swaps out any values | |
749 | for that buffer, making the alist up to date automatically. */ | |
750 | val = find_symbol_value (XCONS (elt)->car); | |
751 | /* Use the current buffer value only if buf is the current buffer. */ | |
752 | if (buf != current_buffer) | |
553defa4 RS |
753 | val = XCONS (elt)->cdr; |
754 | ||
755 | /* If symbol is unbound, put just the symbol in the list. */ | |
756 | if (EQ (val, Qunbound)) | |
757 | result = Fcons (XCONS (elt)->car, result); | |
758 | /* Otherwise, put (symbol . value) in the list. */ | |
759 | else | |
760 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
761 | } |
762 | } | |
763 | ||
1ab256cb RM |
764 | /* Add on all the variables stored in special slots. */ |
765 | { | |
766 | register int offset, mask; | |
767 | ||
768 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
769 | offset < sizeof (struct buffer); | |
4d2f1389 | 770 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 771 | { |
aab80822 | 772 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 773 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
774 | if (SYMBOLP (*(Lisp_Object *)(offset |
775 | + (char *)&buffer_local_symbols))) | |
776 | result = Fcons (Fcons (*((Lisp_Object *) | |
777 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
778 | *(Lisp_Object *)(offset + (char *)buf)), |
779 | result); | |
1ab256cb RM |
780 | } |
781 | } | |
553defa4 RS |
782 | |
783 | return result; | |
1ab256cb RM |
784 | } |
785 | ||
786 | \f | |
787 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
788 | 0, 1, 0, | |
789 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
790 | No argument or nil as argument means use current buffer as BUFFER.") | |
791 | (buffer) | |
792 | register Lisp_Object buffer; | |
793 | { | |
794 | register struct buffer *buf; | |
265a9e55 | 795 | if (NILP (buffer)) |
1ab256cb RM |
796 | buf = current_buffer; |
797 | else | |
798 | { | |
799 | CHECK_BUFFER (buffer, 0); | |
800 | buf = XBUFFER (buffer); | |
801 | } | |
802 | ||
336cd056 | 803 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
804 | } |
805 | ||
806 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
807 | 1, 1, 0, | |
808 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
809 | A non-nil FLAG means mark the buffer modified.") | |
810 | (flag) | |
811 | register Lisp_Object flag; | |
812 | { | |
813 | register int already; | |
814 | register Lisp_Object fn; | |
815 | ||
816 | #ifdef CLASH_DETECTION | |
817 | /* If buffer becoming modified, lock the file. | |
818 | If buffer becoming unmodified, unlock the file. */ | |
819 | ||
60f4dd23 | 820 | fn = current_buffer->file_truename; |
90d456d2 KH |
821 | /* Test buffer-file-name so that binding it to nil is effective. */ |
822 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 823 | { |
336cd056 | 824 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 825 | if (!already && !NILP (flag)) |
1ab256cb | 826 | lock_file (fn); |
265a9e55 | 827 | else if (already && NILP (flag)) |
1ab256cb RM |
828 | unlock_file (fn); |
829 | } | |
830 | #endif /* CLASH_DETECTION */ | |
831 | ||
336cd056 | 832 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
833 | update_mode_lines++; |
834 | return flag; | |
835 | } | |
836 | ||
837 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
838 | 0, 1, 0, | |
839 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
840 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
841 | that buffer is changed. It wraps around occasionally.\n\ | |
842 | No argument or nil as argument means use current buffer as BUFFER.") | |
843 | (buffer) | |
844 | register Lisp_Object buffer; | |
845 | { | |
846 | register struct buffer *buf; | |
265a9e55 | 847 | if (NILP (buffer)) |
1ab256cb RM |
848 | buf = current_buffer; |
849 | else | |
850 | { | |
851 | CHECK_BUFFER (buffer, 0); | |
852 | buf = XBUFFER (buffer); | |
853 | } | |
854 | ||
855 | return make_number (BUF_MODIFF (buf)); | |
856 | } | |
857 | \f | |
01050cb5 | 858 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 859 | "sRename buffer (to new name): \nP", |
1ab256cb | 860 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 861 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 862 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 863 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 864 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
865 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
866 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 867 | This does not change the name of the visited file (if any).") |
489c043a RS |
868 | (newname, unique) |
869 | register Lisp_Object newname, unique; | |
1ab256cb RM |
870 | { |
871 | register Lisp_Object tem, buf; | |
872 | ||
489c043a | 873 | CHECK_STRING (newname, 0); |
d59698c4 | 874 | |
489c043a | 875 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
876 | error ("Empty string is invalid as a buffer name"); |
877 | ||
489c043a | 878 | tem = Fget_buffer (newname); |
c059b5ea RM |
879 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
880 | the buffer automatically so you can create another with the original name. | |
881 | It makes UNIQUE equivalent to | |
489c043a | 882 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 883 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 884 | return current_buffer->name; |
265a9e55 | 885 | if (!NILP (tem)) |
01050cb5 | 886 | { |
3bd779aa | 887 | if (!NILP (unique)) |
489c043a | 888 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 889 | else |
489c043a | 890 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 891 | } |
1ab256cb | 892 | |
489c043a | 893 | current_buffer->name = newname; |
76f590d7 JB |
894 | |
895 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
896 | any windows displaying current_buffer will stay unchanged. */ | |
897 | update_mode_lines++; | |
898 | ||
67180c6a | 899 | XSETBUFFER (buf, current_buffer); |
489c043a | 900 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
901 | if (NILP (current_buffer->filename) |
902 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 903 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
904 | /* Refetch since that last call may have done GC. */ |
905 | return current_buffer->name; | |
1ab256cb RM |
906 | } |
907 | ||
773fbdb9 | 908 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
1ab256cb | 909 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
910 | Buffers not visible in windows are preferred to visible buffers,\n\ |
911 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
97c3c30c RS |
912 | If the optional third argument FRAME is non-nil, use that frame's\n\ |
913 | buffer list instead of the selected frame's buffer list.\n\ | |
1ab256cb RM |
914 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
915 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
773fbdb9 RS |
916 | (buffer, visible_ok, frame) |
917 | register Lisp_Object buffer, visible_ok, frame; | |
1ab256cb | 918 | { |
89132f25 | 919 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 920 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
921 | notsogood = Qnil; |
922 | ||
773fbdb9 RS |
923 | if (NILP (frame)) |
924 | frame = Fselected_frame (); | |
925 | ||
7962a441 | 926 | tail = Vbuffer_alist; |
773fbdb9 | 927 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
928 | |
929 | /* Consider buffers that have been seen in the selected frame | |
930 | before other buffers. */ | |
931 | ||
773fbdb9 | 932 | tem = frame_buffer_list (frame); |
7962a441 RS |
933 | add_ons = Qnil; |
934 | while (CONSP (tem)) | |
935 | { | |
936 | if (BUFFERP (XCONS (tem)->car)) | |
937 | add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons); | |
938 | tem = XCONS (tem)->cdr; | |
939 | } | |
940 | tail = nconc2 (Fnreverse (add_ons), tail); | |
941 | ||
942 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
943 | { |
944 | buf = Fcdr (Fcar (tail)); | |
945 | if (EQ (buf, buffer)) | |
946 | continue; | |
947 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
948 | continue; | |
04ae1b48 RS |
949 | /* If the selected frame has a buffer_predicate, |
950 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 951 | if (!NILP (pred)) |
04ae1b48 | 952 | { |
7962a441 | 953 | tem = call1 (pred, buf); |
04ae1b48 RS |
954 | if (NILP (tem)) |
955 | continue; | |
956 | } | |
04ae1b48 | 957 | |
a0ebb746 | 958 | if (NILP (visible_ok)) |
db732e5a | 959 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
960 | else |
961 | tem = Qnil; | |
265a9e55 | 962 | if (NILP (tem)) |
1ab256cb | 963 | return buf; |
265a9e55 | 964 | if (NILP (notsogood)) |
1ab256cb RM |
965 | notsogood = buf; |
966 | } | |
265a9e55 | 967 | if (!NILP (notsogood)) |
1ab256cb | 968 | return notsogood; |
89132f25 KH |
969 | buf = Fget_buffer_create (build_string ("*scratch*")); |
970 | Fset_buffer_major_mode (buf); | |
971 | return buf; | |
1ab256cb RM |
972 | } |
973 | \f | |
316784fb KH |
974 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
975 | 0, 1, "", | |
5b8bcf48 RS |
976 | "Make BUFFER stop keeping undo information.\n\ |
977 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
978 | (buffer) |
979 | register Lisp_Object buffer; | |
1ab256cb | 980 | { |
ffd56f97 JB |
981 | Lisp_Object real_buffer; |
982 | ||
983 | if (NILP (buffer)) | |
67180c6a | 984 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
985 | else |
986 | { | |
987 | real_buffer = Fget_buffer (buffer); | |
988 | if (NILP (real_buffer)) | |
989 | nsberror (buffer); | |
990 | } | |
991 | ||
992 | XBUFFER (real_buffer)->undo_list = Qt; | |
993 | ||
1ab256cb RM |
994 | return Qnil; |
995 | } | |
996 | ||
997 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
998 | 0, 1, "", | |
999 | "Start keeping undo information for buffer BUFFER.\n\ | |
1000 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
1001 | (buffer) |
1002 | register Lisp_Object buffer; | |
1ab256cb | 1003 | { |
ffd56f97 | 1004 | Lisp_Object real_buffer; |
1ab256cb | 1005 | |
ffd56f97 | 1006 | if (NILP (buffer)) |
67180c6a | 1007 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1008 | else |
1009 | { | |
ffd56f97 JB |
1010 | real_buffer = Fget_buffer (buffer); |
1011 | if (NILP (real_buffer)) | |
1012 | nsberror (buffer); | |
1ab256cb RM |
1013 | } |
1014 | ||
ffd56f97 JB |
1015 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1016 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1017 | |
1018 | return Qnil; | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1023 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1024 | The buffer being killed will be current while the hook is running.\n\ | |
1025 | See `kill-buffer'." | |
1026 | */ | |
1027 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
1028 | "Kill the buffer BUFFER.\n\ | |
1029 | The argument may be a buffer or may be the name of a buffer.\n\ | |
1030 | An argument of nil means kill the current buffer.\n\n\ | |
1031 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
1032 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
1033 | if not void, is a list of functions to be called, with no arguments,\n\ | |
1034 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
1035 | when the hook functions are called.\n\n\ | |
1036 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 1037 | with SIGHUP.") |
a25f13ae KH |
1038 | (buffer) |
1039 | Lisp_Object buffer; | |
1ab256cb RM |
1040 | { |
1041 | Lisp_Object buf; | |
1042 | register struct buffer *b; | |
1043 | register Lisp_Object tem; | |
1044 | register struct Lisp_Marker *m; | |
1045 | struct gcpro gcpro1, gcpro2; | |
1046 | ||
a25f13ae | 1047 | if (NILP (buffer)) |
1ab256cb RM |
1048 | buf = Fcurrent_buffer (); |
1049 | else | |
a25f13ae | 1050 | buf = Fget_buffer (buffer); |
265a9e55 | 1051 | if (NILP (buf)) |
a25f13ae | 1052 | nsberror (buffer); |
1ab256cb RM |
1053 | |
1054 | b = XBUFFER (buf); | |
1055 | ||
4a4a9db5 KH |
1056 | /* Avoid trouble for buffer already dead. */ |
1057 | if (NILP (b->name)) | |
1058 | return Qnil; | |
1059 | ||
1ab256cb | 1060 | /* Query if the buffer is still modified. */ |
265a9e55 | 1061 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1062 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1063 | { |
a25f13ae | 1064 | GCPRO1 (buf); |
1ab256cb RM |
1065 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
1066 | XSTRING (b->name)->data)); | |
1067 | UNGCPRO; | |
265a9e55 | 1068 | if (NILP (tem)) |
1ab256cb RM |
1069 | return Qnil; |
1070 | } | |
1071 | ||
dcdffbf6 | 1072 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
1073 | { |
1074 | register Lisp_Object val; | |
1075 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 1076 | Lisp_Object list; |
1ab256cb RM |
1077 | |
1078 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1079 | set_buffer_internal (b); | |
dcdffbf6 RS |
1080 | |
1081 | /* First run the query functions; if any query is answered no, | |
1082 | don't kill the buffer. */ | |
1083 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1084 | { | |
1085 | tem = call0 (Fcar (list)); | |
1086 | if (NILP (tem)) | |
1087 | return unbind_to (count, Qnil); | |
1088 | } | |
1089 | ||
1090 | /* Then run the hooks. */ | |
fd186f07 RS |
1091 | if (!NILP (Vrun_hooks)) |
1092 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1093 | unbind_to (count, Qnil); |
1094 | } | |
1095 | ||
1096 | /* We have no more questions to ask. Verify that it is valid | |
1097 | to kill the buffer. This must be done after the questions | |
1098 | since anything can happen within do_yes_or_no_p. */ | |
1099 | ||
1100 | /* Don't kill the minibuffer now current. */ | |
1101 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1102 | return Qnil; | |
1103 | ||
265a9e55 | 1104 | if (NILP (b->name)) |
1ab256cb RM |
1105 | return Qnil; |
1106 | ||
336cd056 RS |
1107 | /* When we kill a base buffer, kill all its indirect buffers. |
1108 | We do it at this stage so nothing terrible happens if they | |
1109 | ask questions or their hooks get errors. */ | |
1110 | if (! b->base_buffer) | |
1111 | { | |
1112 | struct buffer *other; | |
1113 | ||
1114 | GCPRO1 (buf); | |
1115 | ||
1116 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1117 | /* all_buffers contains dead buffers too; |
1118 | don't re-kill them. */ | |
1119 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1120 | { |
1121 | Lisp_Object buf; | |
1122 | XSETBUFFER (buf, other); | |
1123 | Fkill_buffer (buf); | |
1124 | } | |
1125 | ||
1126 | UNGCPRO; | |
1127 | } | |
1128 | ||
1ab256cb RM |
1129 | /* Make this buffer not be current. |
1130 | In the process, notice if this is the sole visible buffer | |
1131 | and give up if so. */ | |
1132 | if (b == current_buffer) | |
1133 | { | |
773fbdb9 | 1134 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1135 | Fset_buffer (tem); |
1136 | if (b == current_buffer) | |
1137 | return Qnil; | |
1138 | } | |
1139 | ||
1140 | /* Now there is no question: we can kill the buffer. */ | |
1141 | ||
1142 | #ifdef CLASH_DETECTION | |
1143 | /* Unlock this buffer's file, if it is locked. */ | |
1144 | unlock_buffer (b); | |
1145 | #endif /* CLASH_DETECTION */ | |
1146 | ||
1ab256cb | 1147 | kill_buffer_processes (buf); |
1ab256cb RM |
1148 | |
1149 | tem = Vinhibit_quit; | |
1150 | Vinhibit_quit = Qt; | |
00550f94 | 1151 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1152 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1153 | frames_discard_buffer (buf); |
1ab256cb RM |
1154 | Vinhibit_quit = tem; |
1155 | ||
9b59d6d0 | 1156 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1157 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1158 | && b->auto_save_modified != 0 |
30e0071c | 1159 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified) |
1ab256cb RM |
1160 | { |
1161 | Lisp_Object tem; | |
1162 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1163 | if (! NILP (tem)) |
cbb6a418 | 1164 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1165 | } |
1166 | ||
4a4a9db5 KH |
1167 | if (b->base_buffer) |
1168 | { | |
1169 | /* Unchain all markers that belong to this indirect buffer. | |
1170 | Don't unchain the markers that belong to the base buffer | |
1171 | or its other indirect buffers. */ | |
1172 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1173 | { | |
1174 | Lisp_Object next; | |
1175 | m = XMARKER (tem); | |
1176 | next = m->chain; | |
1177 | if (m->buffer == b) | |
1178 | unchain_marker (tem); | |
1179 | tem = next; | |
1180 | } | |
1181 | } | |
1182 | else | |
1ab256cb | 1183 | { |
4a4a9db5 | 1184 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1185 | and leave them pointing nowhere. */ |
4a4a9db5 | 1186 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1187 | { |
1188 | m = XMARKER (tem); | |
1189 | m->buffer = 0; | |
1190 | tem = m->chain; | |
1191 | m->chain = Qnil; | |
1192 | } | |
1193 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1194 | |
336cd056 RS |
1195 | #ifdef USE_TEXT_PROPERTIES |
1196 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1197 | #endif | |
1198 | ||
1199 | /* Perhaps we should explicitly free the interval tree here... */ | |
1200 | } | |
33f7013e | 1201 | |
2f3f993b RS |
1202 | /* Reset the local variables, so that this buffer's local values |
1203 | won't be protected from GC. They would be protected | |
1204 | if they happened to remain encached in their symbols. | |
1205 | This gets rid of them for certain. */ | |
1206 | swap_out_buffer_local_variables (b); | |
13de9290 | 1207 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1208 | |
1ab256cb | 1209 | b->name = Qnil; |
336cd056 | 1210 | |
9ac0d9e0 | 1211 | BLOCK_INPUT; |
336cd056 RS |
1212 | if (! b->base_buffer) |
1213 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1214 | ||
28e969dd JB |
1215 | if (b->newline_cache) |
1216 | { | |
1217 | free_region_cache (b->newline_cache); | |
1218 | b->newline_cache = 0; | |
1219 | } | |
1220 | if (b->width_run_cache) | |
1221 | { | |
1222 | free_region_cache (b->width_run_cache); | |
1223 | b->width_run_cache = 0; | |
1224 | } | |
1225 | b->width_table = Qnil; | |
0552666b | 1226 | b->minibuffer_prompt_length = Qnil; |
9ac0d9e0 | 1227 | UNBLOCK_INPUT; |
1ab256cb RM |
1228 | b->undo_list = Qnil; |
1229 | ||
1230 | return Qt; | |
1231 | } | |
1232 | \f | |
36a8c287 JB |
1233 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1234 | we do this each time BUF is selected visibly, the more recently | |
1235 | selected buffers are always closer to the front of the list. This | |
1236 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1237 | |
01136e9b | 1238 | void |
1ab256cb RM |
1239 | record_buffer (buf) |
1240 | Lisp_Object buf; | |
1241 | { | |
1242 | register Lisp_Object link, prev; | |
773fbdb9 RS |
1243 | Lisp_Object frame; |
1244 | frame = Fselected_frame (); | |
1ab256cb RM |
1245 | |
1246 | prev = Qnil; | |
1247 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1248 | { | |
1249 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1250 | break; | |
1251 | prev = link; | |
1252 | } | |
1253 | ||
36a8c287 JB |
1254 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1255 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1256 | |
265a9e55 | 1257 | if (NILP (prev)) |
1ab256cb RM |
1258 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1259 | else | |
1260 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1261 | ||
7962a441 | 1262 | XCONS (link)->cdr = Vbuffer_alist; |
1ab256cb | 1263 | Vbuffer_alist = link; |
7962a441 RS |
1264 | |
1265 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1266 | ||
1267 | prev = Qnil; | |
773fbdb9 RS |
1268 | for (link = frame_buffer_list (frame); CONSP (link); |
1269 | link = XCONS (link)->cdr) | |
7962a441 RS |
1270 | { |
1271 | if (EQ (XCONS (link)->car, buf)) | |
1272 | break; | |
1273 | prev = link; | |
1274 | } | |
1275 | ||
1276 | /* Effectively do delq. */ | |
1277 | ||
1278 | if (CONSP (link)) | |
1279 | { | |
1280 | if (NILP (prev)) | |
773fbdb9 RS |
1281 | set_frame_buffer_list (frame, |
1282 | XCONS (frame_buffer_list (frame))->cdr); | |
7962a441 RS |
1283 | else |
1284 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1285 | ||
773fbdb9 RS |
1286 | XCONS (link)->cdr = frame_buffer_list (frame); |
1287 | set_frame_buffer_list (frame, link); | |
7962a441 RS |
1288 | } |
1289 | else | |
773fbdb9 | 1290 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1291 | } |
1292 | ||
a9ee7a59 KH |
1293 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1294 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1295 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1296 | the current buffer's major mode.") | |
a2428fa2 EN |
1297 | (buffer) |
1298 | Lisp_Object buffer; | |
a9ee7a59 KH |
1299 | { |
1300 | int count; | |
1301 | Lisp_Object function; | |
1302 | ||
1303 | function = buffer_defaults.major_mode; | |
1304 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1305 | function = current_buffer->major_mode; | |
1306 | ||
1307 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1308 | return Qnil; | |
1309 | ||
1310 | count = specpdl_ptr - specpdl; | |
1311 | ||
1312 | /* To select a nonfundamental mode, | |
1313 | select the buffer temporarily and then call the mode function. */ | |
1314 | ||
1315 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1316 | ||
a2428fa2 | 1317 | Fset_buffer (buffer); |
a9ee7a59 KH |
1318 | call0 (function); |
1319 | ||
1320 | return unbind_to (count, Qnil); | |
1321 | } | |
1322 | ||
2594e0fd RS |
1323 | /* If switching buffers in WINDOW would be an error, return |
1324 | a C string saying what the error would be. */ | |
1325 | ||
1326 | char * | |
1327 | no_switch_window (window) | |
1328 | Lisp_Object window; | |
1ab256cb | 1329 | { |
1ab256cb | 1330 | Lisp_Object tem; |
2594e0fd RS |
1331 | if (EQ (minibuf_window, window)) |
1332 | return "Cannot switch buffers in minibuffer window"; | |
1333 | tem = Fwindow_dedicated_p (window); | |
265a9e55 | 1334 | if (!NILP (tem)) |
2594e0fd RS |
1335 | return "Cannot switch buffers in a dedicated window"; |
1336 | return NULL; | |
1337 | } | |
1338 | ||
1339 | /* Switch to buffer BUFFER in the selected window. | |
1340 | If NORECORD is non-nil, don't call record_buffer. */ | |
1341 | ||
1342 | Lisp_Object | |
1343 | switch_to_buffer_1 (buffer, norecord) | |
1344 | Lisp_Object buffer, norecord; | |
1345 | { | |
1346 | register Lisp_Object buf; | |
1ab256cb | 1347 | |
a25f13ae | 1348 | if (NILP (buffer)) |
773fbdb9 | 1349 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1350 | else |
a9ee7a59 | 1351 | { |
a25f13ae | 1352 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1353 | if (NILP (buf)) |
1354 | { | |
a25f13ae | 1355 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1356 | Fset_buffer_major_mode (buf); |
1357 | } | |
1358 | } | |
1ab256cb | 1359 | Fset_buffer (buf); |
265a9e55 | 1360 | if (NILP (norecord)) |
1ab256cb RM |
1361 | record_buffer (buf); |
1362 | ||
1363 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1364 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1365 | : selected_window, | |
1ab256cb RM |
1366 | buf); |
1367 | ||
cd0c235a | 1368 | return buf; |
1ab256cb RM |
1369 | } |
1370 | ||
2594e0fd RS |
1371 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1372 | "Select buffer BUFFER in the current window.\n\ | |
1373 | BUFFER may be a buffer or a buffer name.\n\ | |
1374 | Optional second arg NORECORD non-nil means\n\ | |
1375 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1376 | \n\ | |
1377 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1378 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1379 | the window-buffer correspondences.") | |
1380 | (buffer, norecord) | |
1381 | Lisp_Object buffer, norecord; | |
1382 | { | |
1383 | char *err; | |
1384 | ||
1385 | err = no_switch_window (selected_window); | |
1386 | if (err) error (err); | |
1387 | ||
1388 | return switch_to_buffer_1 (buffer, norecord); | |
1389 | } | |
1390 | ||
cd0c235a | 1391 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
1ab256cb RM |
1392 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
1393 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1394 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1395 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1396 | window even if BUFFER is already visible in the selected window.\n\ |
1397 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
6d12711f RS |
1398 | of `display-buffer' for additional customization information.\n\ |
1399 | \n\ | |
1400 | Optional third arg NORECORD non-nil means\n\ | |
1401 | do not put this buffer at the front of the list of recently selected ones.") | |
1402 | (buffer, other_window, norecord) | |
1403 | Lisp_Object buffer, other_window, norecord; | |
1ab256cb RM |
1404 | { |
1405 | register Lisp_Object buf; | |
a25f13ae | 1406 | if (NILP (buffer)) |
773fbdb9 | 1407 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1408 | else |
7c2087ee | 1409 | { |
a25f13ae | 1410 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1411 | if (NILP (buf)) |
1412 | { | |
a25f13ae | 1413 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1414 | Fset_buffer_major_mode (buf); |
1415 | } | |
1416 | } | |
1ab256cb | 1417 | Fset_buffer (buf); |
6d12711f RS |
1418 | if (NILP (norecord)) |
1419 | record_buffer (buf); | |
6b17d756 | 1420 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1421 | return buf; |
1ab256cb RM |
1422 | } |
1423 | ||
1424 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1425 | "Return the current buffer as a Lisp object.") | |
1426 | () | |
1427 | { | |
1428 | register Lisp_Object buf; | |
67180c6a | 1429 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1430 | return buf; |
1431 | } | |
1432 | \f | |
7ec44ec6 GM |
1433 | /* Set the current buffer to B. |
1434 | ||
1435 | We previously set windows_or_buffers_changed here to invalidate | |
1436 | global unchanged information in beg_unchanged and end_unchanged. | |
1437 | This is no longer necessary because we now compute unchanged | |
1438 | information on a buffer-basis. Every action affecting other | |
1439 | windows than the selected one requires a select_window at some | |
1440 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1441 | |
1442 | void | |
1443 | set_buffer_internal (b) | |
1444 | register struct buffer *b; | |
1445 | { | |
b5a225b4 | 1446 | if (current_buffer != b) |
7ec44ec6 | 1447 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1448 | } |
1449 | ||
1450 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1451 | This is used by redisplay. */ | |
1452 | ||
1453 | void | |
1454 | set_buffer_internal_1 (b) | |
1455 | register struct buffer *b; | |
1456 | { | |
1457 | register struct buffer *old_buf; | |
1458 | register Lisp_Object tail, valcontents; | |
1459 | Lisp_Object tem; | |
1460 | ||
1461 | if (current_buffer == b) | |
1462 | return; | |
1463 | ||
1ab256cb RM |
1464 | old_buf = current_buffer; |
1465 | current_buffer = b; | |
1466 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1467 | ||
336cd056 RS |
1468 | if (old_buf) |
1469 | { | |
1470 | /* Put the undo list back in the base buffer, so that it appears | |
1471 | that an indirect buffer shares the undo list of its base. */ | |
1472 | if (old_buf->base_buffer) | |
1473 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1474 | ||
1475 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1476 | when it is not current, update them now. */ | |
1477 | if (! NILP (old_buf->pt_marker)) | |
1478 | { | |
1479 | Lisp_Object obuf; | |
1480 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1481 | set_marker_both (old_buf->pt_marker, obuf, |
1482 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1483 | } |
1484 | if (! NILP (old_buf->begv_marker)) | |
1485 | { | |
1486 | Lisp_Object obuf; | |
1487 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1488 | set_marker_both (old_buf->begv_marker, obuf, |
1489 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1490 | } |
1491 | if (! NILP (old_buf->zv_marker)) | |
1492 | { | |
1493 | Lisp_Object obuf; | |
1494 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1495 | set_marker_both (old_buf->zv_marker, obuf, |
1496 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1497 | } |
1498 | } | |
1499 | ||
1500 | /* Get the undo list from the base buffer, so that it appears | |
1501 | that an indirect buffer shares the undo list of its base. */ | |
1502 | if (b->base_buffer) | |
1503 | b->undo_list = b->base_buffer->undo_list; | |
1504 | ||
1505 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1506 | when it is not current, fetch them now. */ | |
1507 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1508 | { |
1509 | BUF_PT (b) = marker_position (b->pt_marker); | |
1510 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1511 | } | |
336cd056 | 1512 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1513 | { |
1514 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1515 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1516 | } | |
336cd056 | 1517 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1518 | { |
1519 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1520 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1521 | } | |
336cd056 | 1522 | |
1ab256cb RM |
1523 | /* Look down buffer's list of local Lisp variables |
1524 | to find and update any that forward into C variables. */ | |
1525 | ||
265a9e55 | 1526 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1527 | { |
1528 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1529 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1530 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1531 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1532 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1533 | /* Just reference the variable |
1534 | to cause it to become set for this buffer. */ | |
1535 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1536 | } | |
1537 | ||
1538 | /* Do the same with any others that were local to the previous buffer */ | |
1539 | ||
1540 | if (old_buf) | |
265a9e55 | 1541 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1542 | { |
1543 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1544 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1545 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1546 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1547 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1548 | /* Just reference the variable |
1549 | to cause it to become set for this buffer. */ | |
1550 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1551 | } | |
1552 | } | |
1553 | ||
336cd056 | 1554 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1555 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1556 | |
1557 | void | |
1558 | set_buffer_temp (b) | |
1559 | struct buffer *b; | |
1560 | { | |
1561 | register struct buffer *old_buf; | |
1562 | ||
1563 | if (current_buffer == b) | |
1564 | return; | |
1565 | ||
1566 | old_buf = current_buffer; | |
1567 | current_buffer = b; | |
1568 | ||
1569 | if (old_buf) | |
1570 | { | |
1571 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1572 | when it is not current, update them now. */ | |
1573 | if (! NILP (old_buf->pt_marker)) | |
1574 | { | |
1575 | Lisp_Object obuf; | |
1576 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1577 | set_marker_both (old_buf->pt_marker, obuf, |
1578 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1579 | } |
1580 | if (! NILP (old_buf->begv_marker)) | |
1581 | { | |
1582 | Lisp_Object obuf; | |
1583 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1584 | set_marker_both (old_buf->begv_marker, obuf, |
1585 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1586 | } |
1587 | if (! NILP (old_buf->zv_marker)) | |
1588 | { | |
1589 | Lisp_Object obuf; | |
1590 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1591 | set_marker_both (old_buf->zv_marker, obuf, |
1592 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1593 | } |
1594 | } | |
1595 | ||
1596 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1597 | when it is not current, fetch them now. */ | |
1598 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1599 | { |
1600 | BUF_PT (b) = marker_position (b->pt_marker); | |
1601 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1602 | } | |
336cd056 | 1603 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1604 | { |
1605 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1606 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1607 | } | |
336cd056 | 1608 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1609 | { |
1610 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1611 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1612 | } | |
336cd056 RS |
1613 | } |
1614 | ||
1ab256cb RM |
1615 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1616 | "Make the buffer BUFFER current for editing operations.\n\ | |
1617 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1618 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1619 | This function does not display the buffer, so its effect ends\n\ | |
1620 | when the current command terminates.\n\ | |
1621 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1622 | (buffer) |
1623 | register Lisp_Object buffer; | |
1ab256cb | 1624 | { |
a25f13ae KH |
1625 | register Lisp_Object buf; |
1626 | buf = Fget_buffer (buffer); | |
1627 | if (NILP (buf)) | |
1628 | nsberror (buffer); | |
1629 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1630 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1631 | set_buffer_internal (XBUFFER (buf)); |
1632 | return buf; | |
1ab256cb | 1633 | } |
d0628b06 RS |
1634 | |
1635 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1636 | ||
1637 | Lisp_Object | |
1638 | set_buffer_if_live (buffer) | |
1639 | Lisp_Object buffer; | |
1640 | { | |
1641 | if (! NILP (XBUFFER (buffer)->name)) | |
1642 | Fset_buffer (buffer); | |
1643 | return Qnil; | |
1644 | } | |
1ab256cb RM |
1645 | \f |
1646 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1647 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1648 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1649 | () | |
1650 | { | |
a96b68f1 RS |
1651 | if (!NILP (current_buffer->read_only) |
1652 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1653 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1654 | return Qnil; | |
1655 | } | |
1656 | ||
1657 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1658 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1659 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1660 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1661 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1662 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1663 | selected window if it is displayed there.") | |
a2428fa2 EN |
1664 | (buffer) |
1665 | register Lisp_Object buffer; | |
1ab256cb | 1666 | { |
b271272a | 1667 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1668 | if (NILP (buffer)) |
a5611885 | 1669 | { |
a2428fa2 | 1670 | XSETBUFFER (buffer, current_buffer); |
0a63b212 RS |
1671 | |
1672 | /* If we're burying the current buffer, unshow it. */ | |
773fbdb9 | 1673 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); |
a5611885 | 1674 | } |
1ab256cb RM |
1675 | else |
1676 | { | |
1677 | Lisp_Object buf1; | |
1678 | ||
a2428fa2 | 1679 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1680 | if (NILP (buf1)) |
a2428fa2 EN |
1681 | nsberror (buffer); |
1682 | buffer = buf1; | |
b271272a JB |
1683 | } |
1684 | ||
a2428fa2 | 1685 | /* Move buffer to the end of the buffer list. */ |
b271272a JB |
1686 | { |
1687 | register Lisp_Object aelt, link; | |
1688 | ||
a2428fa2 | 1689 | aelt = Frassq (buffer, Vbuffer_alist); |
b271272a JB |
1690 | link = Fmemq (aelt, Vbuffer_alist); |
1691 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1692 | XCONS (link)->cdr = Qnil; | |
1693 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1694 | } | |
1ab256cb | 1695 | |
dcb26650 | 1696 | frames_bury_buffer (buffer); |
dec989eb | 1697 | |
1ab256cb RM |
1698 | return Qnil; |
1699 | } | |
1700 | \f | |
c922bc55 | 1701 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1702 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1703 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1704 | so the buffer is truly empty after this.") |
1705 | () | |
1706 | { | |
1707 | Fwiden (); | |
1708 | del_range (BEG, Z); | |
1709 | current_buffer->last_window_start = 1; | |
1710 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1711 | if future size is less than past size. Use of erase-buffer | |
1712 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1713 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1714 | return Qnil; |
1715 | } | |
1716 | ||
01136e9b | 1717 | void |
1ab256cb RM |
1718 | validate_region (b, e) |
1719 | register Lisp_Object *b, *e; | |
1720 | { | |
1ab256cb RM |
1721 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1722 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1723 | ||
1724 | if (XINT (*b) > XINT (*e)) | |
1725 | { | |
03192067 KH |
1726 | Lisp_Object tem; |
1727 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1728 | } |
1729 | ||
1730 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1731 | && XINT (*e) <= ZV)) | |
1732 | args_out_of_range (*b, *e); | |
1733 | } | |
1734 | \f | |
b05525fa RS |
1735 | /* Advance BYTE_POS up to a character boundary |
1736 | and return the adjusted position. */ | |
1737 | ||
1738 | static int | |
1739 | advance_to_char_boundary (byte_pos) | |
1740 | int byte_pos; | |
1741 | { | |
f8449323 | 1742 | int c; |
b05525fa | 1743 | |
f8449323 RS |
1744 | if (byte_pos == BEG) |
1745 | /* Beginning of buffer is always a character boundary. */ | |
1746 | return 1; | |
1747 | ||
1748 | c = FETCH_BYTE (byte_pos); | |
1749 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1750 | { |
1be6387d | 1751 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 RS |
1752 | multibyte sequence. */ |
1753 | DEC_POS (byte_pos); | |
1754 | INC_POS (byte_pos); | |
1755 | /* If C is a constituent of a multibyte sequence, BYTE_POS was | |
1756 | surely advance to the correct character boundary. If C is | |
1757 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
1758 | } |
1759 | ||
20773569 | 1760 | return byte_pos; |
b05525fa RS |
1761 | } |
1762 | ||
3ac81adb RS |
1763 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
1764 | 1, 1, 0, | |
1765 | "Set the multibyte flag of the current buffer to FLAG.\n\ | |
1766 | If FLAG is t, this makes the buffer a multibyte buffer.\n\ | |
1767 | If FLAG is nil, this makes the buffer a single-byte buffer.\n\ | |
1768 | The buffer contents remain unchanged as a sequence of bytes\n\ | |
1769 | but the contents viewed as characters do change.") | |
1770 | (flag) | |
1771 | Lisp_Object flag; | |
1772 | { | |
1773 | Lisp_Object tail, markers; | |
abc9d959 | 1774 | struct buffer *other; |
3ac81adb | 1775 | |
6e553d5e RS |
1776 | if (current_buffer->base_buffer) |
1777 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
1778 | ||
70e77119 AS |
1779 | /* Do nothing if nothing actually changes. */ |
1780 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
1781 | return flag; | |
1782 | ||
b05525fa RS |
1783 | /* It would be better to update the list, |
1784 | but this is good enough for now. */ | |
1785 | if (! EQ (current_buffer->undo_list, Qt)) | |
1786 | current_buffer->undo_list = Qnil; | |
1787 | ||
3ac81adb RS |
1788 | /* If the cached position is for this buffer, clear it out. */ |
1789 | clear_charpos_cache (current_buffer); | |
1790 | ||
1791 | if (NILP (flag)) | |
1792 | { | |
1793 | /* Do this first, so it can use CHAR_TO_BYTE | |
1794 | to calculate the old correspondences. */ | |
1795 | set_intervals_multibyte (0); | |
1796 | ||
1797 | current_buffer->enable_multibyte_characters = Qnil; | |
1798 | ||
1799 | Z = Z_BYTE; | |
1800 | BEGV = BEGV_BYTE; | |
1801 | ZV = ZV_BYTE; | |
1802 | GPT = GPT_BYTE; | |
1803 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
1804 | ||
1805 | tail = BUF_MARKERS (current_buffer); | |
1806 | while (XSYMBOL (tail) != XSYMBOL (Qnil)) | |
1807 | { | |
1808 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
1809 | tail = XMARKER (tail)->chain; | |
1810 | } | |
1811 | } | |
1812 | else | |
1813 | { | |
673c57d2 KH |
1814 | /* Be sure not to have a multibyte sequence striding over the GAP. |
1815 | Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..." | |
1816 | to: "...abc _GAP_ \201\241\241\241\241\241..." */ | |
1817 | ||
1818 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
1819 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
1820 | { | |
1821 | unsigned char *p = GPT_ADDR - 1; | |
1822 | ||
1823 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
1824 | if (BASE_LEADING_CODE_P (*p)) | |
1825 | { | |
1826 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
1827 | ||
1828 | move_gap_both (new_gpt, new_gpt); | |
1829 | } | |
1830 | } | |
1831 | ||
3ac81adb RS |
1832 | /* Do this first, so that chars_in_text asks the right question. |
1833 | set_intervals_multibyte needs it too. */ | |
1834 | current_buffer->enable_multibyte_characters = Qt; | |
1835 | ||
b05525fa | 1836 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 1837 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 1838 | |
673c57d2 | 1839 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
1840 | |
1841 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 1842 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 1843 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
1844 | else |
1845 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
1846 | |
1847 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 1848 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 1849 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
1850 | else |
1851 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
1852 | |
1853 | { | |
1854 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
1855 | int pt; | |
1856 | ||
1857 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 1858 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
1859 | else |
1860 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
1861 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
1862 | } | |
3ac81adb RS |
1863 | |
1864 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
1865 | |
1866 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
1867 | getting confused by the markers that have not yet been updated. | |
1868 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
1869 | BUF_MARKERS (current_buffer) = Qnil; |
1870 | ||
1871 | while (XSYMBOL (tail) != XSYMBOL (Qnil)) | |
1872 | { | |
b05525fa RS |
1873 | XMARKER (tail)->bytepos |
1874 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 1875 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 1876 | |
3ac81adb RS |
1877 | tail = XMARKER (tail)->chain; |
1878 | } | |
b69f9797 RS |
1879 | |
1880 | /* Make sure no markers were put on the chain | |
1881 | while the chain value was incorrect. */ | |
1882 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
1883 | abort (); | |
1884 | ||
3ac81adb RS |
1885 | BUF_MARKERS (current_buffer) = markers; |
1886 | ||
1887 | /* Do this last, so it can calculate the new correspondences | |
1888 | between chars and bytes. */ | |
1889 | set_intervals_multibyte (1); | |
1890 | } | |
1891 | ||
abc9d959 RS |
1892 | /* Copy this buffer's new multibyte status |
1893 | into all of its indirect buffers. */ | |
1894 | for (other = all_buffers; other; other = other->next) | |
1895 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
1896 | other->enable_multibyte_characters | |
1897 | = current_buffer->enable_multibyte_characters; | |
1898 | ||
3ac81adb RS |
1899 | return flag; |
1900 | } | |
1901 | \f | |
1ab256cb RM |
1902 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1903 | 0, 0, 0, | |
1904 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1905 | Most local variable bindings are eliminated so that the default values\n\ | |
1906 | become effective once more. Also, the syntax table is set from\n\ | |
1907 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1908 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1909 | This function also forces redisplay of the mode line.\n\ | |
1910 | \n\ | |
1911 | Every function to select a new major mode starts by\n\ | |
1912 | calling this function.\n\n\ | |
1913 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1914 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1915 | \n\ | |
1916 | The first thing this function does is run\n\ | |
1917 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1918 | () |
1919 | { | |
1920 | register Lisp_Object alist, sym, tem; | |
1921 | Lisp_Object oalist; | |
7410477a | 1922 | |
fd186f07 RS |
1923 | if (!NILP (Vrun_hooks)) |
1924 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1925 | oalist = current_buffer->local_var_alist; |
1926 | ||
2f3f993b RS |
1927 | /* Make sure none of the bindings in oalist |
1928 | remain swapped in, in their symbols. */ | |
1ab256cb | 1929 | |
2f3f993b | 1930 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
1931 | |
1932 | /* Actually eliminate all local bindings of this buffer. */ | |
1933 | ||
13de9290 | 1934 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
1935 | |
1936 | /* Redisplay mode lines; we are changing major mode. */ | |
1937 | ||
1938 | update_mode_lines++; | |
1939 | ||
1940 | /* Any which are supposed to be permanent, | |
1941 | make local again, with the same values they had. */ | |
1942 | ||
265a9e55 | 1943 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1944 | { |
1945 | sym = XCONS (XCONS (alist)->car)->car; | |
1946 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1947 | if (! NILP (tem)) |
01050cb5 RM |
1948 | { |
1949 | Fmake_local_variable (sym); | |
1950 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1951 | } | |
1ab256cb RM |
1952 | } |
1953 | ||
1954 | /* Force mode-line redisplay. Useful here because all major mode | |
1955 | commands call this function. */ | |
1956 | update_mode_lines++; | |
1957 | ||
1958 | return Qnil; | |
1959 | } | |
2f3f993b RS |
1960 | |
1961 | /* Make sure no local variables remain set up with buffer B | |
1962 | for their current values. */ | |
1963 | ||
1964 | static void | |
1965 | swap_out_buffer_local_variables (b) | |
1966 | struct buffer *b; | |
1967 | { | |
1968 | Lisp_Object oalist, alist, sym, tem, buffer; | |
1969 | ||
1970 | XSETBUFFER (buffer, b); | |
1971 | oalist = b->local_var_alist; | |
1972 | ||
1973 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) | |
1974 | { | |
1975 | sym = XCONS (XCONS (alist)->car)->car; | |
1976 | ||
1977 | /* Need not do anything if some other buffer's binding is now encached. */ | |
3d871c85 | 1978 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer; |
2f3f993b RS |
1979 | if (XBUFFER (tem) == current_buffer) |
1980 | { | |
1981 | /* Symbol is set up for this buffer's old local value. | |
1982 | Set it up for the current buffer with the default value. */ | |
1983 | ||
3d871c85 | 1984 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr; |
2f3f993b RS |
1985 | /* Store the symbol's current value into the alist entry |
1986 | it is currently set up for. This is so that, if the | |
1987 | local is marked permanent, and we make it local again | |
1988 | later in Fkill_all_local_variables, we don't lose the value. */ | |
1989 | XCONS (XCONS (tem)->car)->cdr | |
3d871c85 | 1990 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue); |
2f3f993b RS |
1991 | /* Switch to the symbol's default-value alist entry. */ |
1992 | XCONS (tem)->car = tem; | |
1993 | /* Mark it as current for buffer B. */ | |
3d871c85 | 1994 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer = buffer; |
2f3f993b | 1995 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 RS |
1996 | store_symval_forwarding (sym, |
1997 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue, | |
2f3f993b RS |
1998 | XCONS (tem)->cdr); |
1999 | } | |
2000 | } | |
2001 | } | |
1ab256cb | 2002 | \f |
2eec3b4e RS |
2003 | /* Find all the overlays in the current buffer that contain position POS. |
2004 | Return the number found, and store them in a vector in *VEC_PTR. | |
2005 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
2006 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2007 | or ZV if there are no more overlays. | |
bbbe9545 | 2008 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2009 | or where an overlay starts which ends at or after POS; |
2010 | or BEGV if there are no such overlays. | |
239c932b | 2011 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2012 | |
2013 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2014 | when this function is called. |
2015 | ||
2016 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2017 | If EXTEND is zero, we never extend the vector, | |
2018 | and we store only as many overlays as will fit. | |
2019 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
2020 | |
2021 | int | |
239c932b | 2022 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 2023 | int pos; |
61d54cd5 | 2024 | int extend; |
2eec3b4e RS |
2025 | Lisp_Object **vec_ptr; |
2026 | int *len_ptr; | |
2027 | int *next_ptr; | |
239c932b | 2028 | int *prev_ptr; |
1ab256cb | 2029 | { |
2eec3b4e RS |
2030 | Lisp_Object tail, overlay, start, end, result; |
2031 | int idx = 0; | |
2032 | int len = *len_ptr; | |
2033 | Lisp_Object *vec = *vec_ptr; | |
2034 | int next = ZV; | |
239c932b | 2035 | int prev = BEGV; |
61d54cd5 RS |
2036 | int inhibit_storing = 0; |
2037 | ||
2eec3b4e | 2038 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2039 | GC_CONSP (tail); |
2eec3b4e RS |
2040 | tail = XCONS (tail)->cdr) |
2041 | { | |
239c932b | 2042 | int startpos, endpos; |
52f8ec73 | 2043 | |
2eec3b4e | 2044 | overlay = XCONS (tail)->car; |
1ab256cb | 2045 | |
2eec3b4e RS |
2046 | start = OVERLAY_START (overlay); |
2047 | end = OVERLAY_END (overlay); | |
239c932b RS |
2048 | endpos = OVERLAY_POSITION (end); |
2049 | if (endpos < pos) | |
2050 | { | |
2051 | if (prev < endpos) | |
2052 | prev = endpos; | |
2053 | break; | |
2054 | } | |
413e06a4 RS |
2055 | startpos = OVERLAY_POSITION (start); |
2056 | /* This one ends at or after POS | |
daa1c109 | 2057 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2058 | if (prev < startpos && startpos < pos) |
2059 | prev = startpos; | |
239c932b RS |
2060 | if (endpos == pos) |
2061 | continue; | |
2eec3b4e RS |
2062 | if (startpos <= pos) |
2063 | { | |
2064 | if (idx == len) | |
2065 | { | |
61d54cd5 RS |
2066 | /* The supplied vector is full. |
2067 | Either make it bigger, or don't store any more in it. */ | |
2068 | if (extend) | |
2069 | { | |
0552666b GM |
2070 | /* Make it work with an initial len == 0. */ |
2071 | len *= 2; | |
2072 | if (len == 0) | |
2073 | len = 4; | |
2074 | *len_ptr = len; | |
61d54cd5 RS |
2075 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2076 | *vec_ptr = vec; | |
2077 | } | |
2078 | else | |
2079 | inhibit_storing = 1; | |
2eec3b4e | 2080 | } |
61d54cd5 RS |
2081 | |
2082 | if (!inhibit_storing) | |
2083 | vec[idx] = overlay; | |
2084 | /* Keep counting overlays even if we can't return them all. */ | |
2085 | idx++; | |
2eec3b4e RS |
2086 | } |
2087 | else if (startpos < next) | |
2088 | next = startpos; | |
2089 | } | |
2090 | ||
2091 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2092 | GC_CONSP (tail); |
2eec3b4e | 2093 | tail = XCONS (tail)->cdr) |
1ab256cb | 2094 | { |
239c932b | 2095 | int startpos, endpos; |
52f8ec73 | 2096 | |
2eec3b4e | 2097 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
2098 | |
2099 | start = OVERLAY_START (overlay); | |
2100 | end = OVERLAY_END (overlay); | |
2101 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2102 | if (pos < startpos) |
2eec3b4e RS |
2103 | { |
2104 | if (startpos < next) | |
2105 | next = startpos; | |
2106 | break; | |
2107 | } | |
239c932b RS |
2108 | endpos = OVERLAY_POSITION (end); |
2109 | if (pos < endpos) | |
2eec3b4e RS |
2110 | { |
2111 | if (idx == len) | |
2112 | { | |
61d54cd5 RS |
2113 | if (extend) |
2114 | { | |
2115 | *len_ptr = len *= 2; | |
0552666b GM |
2116 | if (len == 0) |
2117 | len = *len_ptr = 4; | |
61d54cd5 RS |
2118 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2119 | *vec_ptr = vec; | |
2120 | } | |
2121 | else | |
2122 | inhibit_storing = 1; | |
2eec3b4e | 2123 | } |
61d54cd5 RS |
2124 | |
2125 | if (!inhibit_storing) | |
2126 | vec[idx] = overlay; | |
2127 | idx++; | |
413e06a4 RS |
2128 | |
2129 | if (startpos < pos && startpos > prev) | |
2130 | prev = startpos; | |
2eec3b4e | 2131 | } |
239c932b RS |
2132 | else if (endpos < pos && endpos > prev) |
2133 | prev = endpos; | |
413e06a4 RS |
2134 | else if (endpos == pos && startpos > prev) |
2135 | prev = startpos; | |
1ab256cb RM |
2136 | } |
2137 | ||
239c932b RS |
2138 | if (next_ptr) |
2139 | *next_ptr = next; | |
2140 | if (prev_ptr) | |
2141 | *prev_ptr = prev; | |
2eec3b4e RS |
2142 | return idx; |
2143 | } | |
74514898 RS |
2144 | \f |
2145 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2146 | or are empty at BEG. |
2147 | ||
74514898 RS |
2148 | Return the number found, and store them in a vector in *VEC_PTR. |
2149 | Store in *LEN_PTR the size allocated for the vector. | |
2150 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2151 | or ZV if there are no more overlays. | |
2152 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2153 | or BEGV if there are no previous overlays. | |
2154 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2155 | ||
2156 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2157 | when this function is called. | |
2158 | ||
2159 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2160 | If EXTEND is zero, we never extend the vector, | |
2161 | and we store only as many overlays as will fit. | |
2162 | But we still return the total number of overlays. */ | |
2163 | ||
2164 | int | |
2165 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2166 | int beg, end; | |
2167 | int extend; | |
2168 | Lisp_Object **vec_ptr; | |
2169 | int *len_ptr; | |
2170 | int *next_ptr; | |
2171 | int *prev_ptr; | |
2172 | { | |
2173 | Lisp_Object tail, overlay, ostart, oend, result; | |
2174 | int idx = 0; | |
2175 | int len = *len_ptr; | |
2176 | Lisp_Object *vec = *vec_ptr; | |
2177 | int next = ZV; | |
2178 | int prev = BEGV; | |
2179 | int inhibit_storing = 0; | |
2180 | ||
2181 | for (tail = current_buffer->overlays_before; | |
2182 | GC_CONSP (tail); | |
2183 | tail = XCONS (tail)->cdr) | |
2184 | { | |
2185 | int startpos, endpos; | |
2186 | ||
2187 | overlay = XCONS (tail)->car; | |
2188 | ||
2189 | ostart = OVERLAY_START (overlay); | |
2190 | oend = OVERLAY_END (overlay); | |
2191 | endpos = OVERLAY_POSITION (oend); | |
2192 | if (endpos < beg) | |
2193 | { | |
2194 | if (prev < endpos) | |
2195 | prev = endpos; | |
2196 | break; | |
2197 | } | |
2198 | startpos = OVERLAY_POSITION (ostart); | |
2199 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2200 | or is empty at the start of the range. */ |
74514898 | 2201 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2202 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2203 | { |
2204 | if (idx == len) | |
2205 | { | |
2206 | /* The supplied vector is full. | |
2207 | Either make it bigger, or don't store any more in it. */ | |
2208 | if (extend) | |
2209 | { | |
2210 | *len_ptr = len *= 2; | |
2211 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2212 | *vec_ptr = vec; | |
2213 | } | |
2214 | else | |
2215 | inhibit_storing = 1; | |
2216 | } | |
2217 | ||
2218 | if (!inhibit_storing) | |
2219 | vec[idx] = overlay; | |
2220 | /* Keep counting overlays even if we can't return them all. */ | |
2221 | idx++; | |
2222 | } | |
2223 | else if (startpos < next) | |
2224 | next = startpos; | |
2225 | } | |
2226 | ||
2227 | for (tail = current_buffer->overlays_after; | |
2228 | GC_CONSP (tail); | |
2229 | tail = XCONS (tail)->cdr) | |
2230 | { | |
2231 | int startpos, endpos; | |
2232 | ||
2233 | overlay = XCONS (tail)->car; | |
2234 | ||
2235 | ostart = OVERLAY_START (overlay); | |
2236 | oend = OVERLAY_END (overlay); | |
2237 | startpos = OVERLAY_POSITION (ostart); | |
2238 | if (end < startpos) | |
2239 | { | |
2240 | if (startpos < next) | |
2241 | next = startpos; | |
2242 | break; | |
2243 | } | |
2244 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2245 | /* Count an interval if it either overlaps the range |
2246 | or is empty at the start of the range. */ | |
74514898 | 2247 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2248 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2249 | { |
2250 | if (idx == len) | |
2251 | { | |
2252 | if (extend) | |
2253 | { | |
2254 | *len_ptr = len *= 2; | |
2255 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2256 | *vec_ptr = vec; | |
2257 | } | |
2258 | else | |
2259 | inhibit_storing = 1; | |
2260 | } | |
2261 | ||
2262 | if (!inhibit_storing) | |
2263 | vec[idx] = overlay; | |
2264 | idx++; | |
2265 | } | |
2266 | else if (endpos < beg && endpos > prev) | |
2267 | prev = endpos; | |
2268 | } | |
fc04fa47 | 2269 | |
74514898 RS |
2270 | if (next_ptr) |
2271 | *next_ptr = next; | |
2272 | if (prev_ptr) | |
2273 | *prev_ptr = prev; | |
2274 | return idx; | |
2275 | } | |
2276 | \f | |
fc04fa47 KH |
2277 | /* Fast function to just test if we're at an overlay boundary. */ |
2278 | int | |
2279 | overlay_touches_p (pos) | |
2280 | int pos; | |
2281 | { | |
2282 | Lisp_Object tail, overlay; | |
2283 | ||
2284 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
2285 | tail = XCONS (tail)->cdr) | |
2286 | { | |
2287 | int endpos; | |
2288 | ||
2289 | overlay = XCONS (tail)->car; | |
2290 | if (!GC_OVERLAYP (overlay)) | |
2291 | abort (); | |
2292 | ||
2293 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2294 | if (endpos < pos) | |
2295 | break; | |
2296 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2297 | return 1; | |
2298 | } | |
2299 | ||
2300 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
2301 | tail = XCONS (tail)->cdr) | |
2302 | { | |
2303 | int startpos; | |
2304 | ||
2305 | overlay = XCONS (tail)->car; | |
2306 | if (!GC_OVERLAYP (overlay)) | |
2307 | abort (); | |
2308 | ||
2309 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2310 | if (pos < startpos) | |
2311 | break; | |
2312 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2313 | return 1; | |
2314 | } | |
2315 | return 0; | |
2316 | } | |
2eec3b4e | 2317 | \f |
5985d248 KH |
2318 | struct sortvec |
2319 | { | |
2320 | Lisp_Object overlay; | |
2321 | int beg, end; | |
2322 | int priority; | |
2323 | }; | |
2324 | ||
2325 | static int | |
dfcf069d AS |
2326 | compare_overlays (v1, v2) |
2327 | const void *v1, *v2; | |
5985d248 | 2328 | { |
dfcf069d AS |
2329 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2330 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2331 | if (s1->priority != s2->priority) |
2332 | return s1->priority - s2->priority; | |
2333 | if (s1->beg != s2->beg) | |
2334 | return s1->beg - s2->beg; | |
2335 | if (s1->end != s2->end) | |
2336 | return s2->end - s1->end; | |
2337 | return 0; | |
2338 | } | |
2339 | ||
2340 | /* Sort an array of overlays by priority. The array is modified in place. | |
2341 | The return value is the new size; this may be smaller than the original | |
2342 | size if some of the overlays were invalid or were window-specific. */ | |
2343 | int | |
2344 | sort_overlays (overlay_vec, noverlays, w) | |
2345 | Lisp_Object *overlay_vec; | |
2346 | int noverlays; | |
2347 | struct window *w; | |
2348 | { | |
2349 | int i, j; | |
2350 | struct sortvec *sortvec; | |
2351 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2352 | ||
2353 | /* Put the valid and relevant overlays into sortvec. */ | |
2354 | ||
2355 | for (i = 0, j = 0; i < noverlays; i++) | |
2356 | { | |
0fa767e7 | 2357 | Lisp_Object tem; |
c99fc30f | 2358 | Lisp_Object overlay; |
5985d248 | 2359 | |
c99fc30f | 2360 | overlay = overlay_vec[i]; |
5985d248 KH |
2361 | if (OVERLAY_VALID (overlay) |
2362 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2363 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2364 | { | |
0fa767e7 KH |
2365 | /* If we're interested in a specific window, then ignore |
2366 | overlays that are limited to some other window. */ | |
2367 | if (w) | |
5985d248 | 2368 | { |
0fa767e7 KH |
2369 | Lisp_Object window; |
2370 | ||
2371 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2372 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2373 | continue; |
5985d248 | 2374 | } |
0fa767e7 KH |
2375 | |
2376 | /* This overlay is good and counts: put it into sortvec. */ | |
2377 | sortvec[j].overlay = overlay; | |
2378 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2379 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2380 | tem = Foverlay_get (overlay, Qpriority); | |
2381 | if (INTEGERP (tem)) | |
2382 | sortvec[j].priority = XINT (tem); | |
2383 | else | |
2384 | sortvec[j].priority = 0; | |
2385 | j++; | |
5985d248 KH |
2386 | } |
2387 | } | |
2388 | noverlays = j; | |
2389 | ||
2390 | /* Sort the overlays into the proper order: increasing priority. */ | |
2391 | ||
2392 | if (noverlays > 1) | |
2393 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2394 | ||
2395 | for (i = 0; i < noverlays; i++) | |
2396 | overlay_vec[i] = sortvec[i].overlay; | |
2397 | return (noverlays); | |
2398 | } | |
2399 | \f | |
bbbe9545 KH |
2400 | struct sortstr |
2401 | { | |
cb26008f | 2402 | Lisp_Object string, string2; |
bbbe9545 KH |
2403 | int size; |
2404 | int priority; | |
2405 | }; | |
2406 | ||
e8185fa8 KH |
2407 | struct sortstrlist |
2408 | { | |
2409 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2410 | int size; /* Allocated length of that array. */ | |
2411 | int used; /* How much of the array is currently in use. */ | |
2412 | int bytes; /* Total length of the strings in buf. */ | |
2413 | }; | |
2414 | ||
2415 | /* Buffers for storing information about the overlays touching a given | |
2416 | position. These could be automatic variables in overlay_strings, but | |
2417 | it's more efficient to hold onto the memory instead of repeatedly | |
2418 | allocating and freeing it. */ | |
2419 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2420 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2421 | |
2422 | /* Allocated length of overlay_str_buf. */ | |
2423 | static int overlay_str_len; | |
2424 | ||
bbbe9545 KH |
2425 | /* A comparison function suitable for passing to qsort. */ |
2426 | static int | |
2427 | cmp_for_strings (as1, as2) | |
2428 | char *as1, *as2; | |
2429 | { | |
2430 | struct sortstr *s1 = (struct sortstr *)as1; | |
2431 | struct sortstr *s2 = (struct sortstr *)as2; | |
2432 | if (s1->size != s2->size) | |
2433 | return s2->size - s1->size; | |
2434 | if (s1->priority != s2->priority) | |
2435 | return s1->priority - s2->priority; | |
2436 | return 0; | |
2437 | } | |
2438 | ||
e8185fa8 | 2439 | static void |
cb26008f | 2440 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2441 | struct sortstrlist *ssl; |
cb26008f | 2442 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2443 | int size; |
2444 | { | |
43d27a72 RS |
2445 | int nbytes; |
2446 | ||
e8185fa8 KH |
2447 | if (ssl->used == ssl->size) |
2448 | { | |
2449 | if (ssl->buf) | |
2450 | ssl->size *= 2; | |
2451 | else | |
2452 | ssl->size = 5; | |
2453 | ssl->buf = ((struct sortstr *) | |
2454 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2455 | } | |
2456 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2457 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2458 | ssl->buf[ssl->used].size = size; |
2459 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2460 | ssl->used++; | |
43d27a72 RS |
2461 | |
2462 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2463 | nbytes = XSTRING (str)->size; | |
2464 | else if (! STRING_MULTIBYTE (str)) | |
2465 | nbytes = count_size_as_multibyte (XSTRING (str)->data, | |
fc932ac6 | 2466 | STRING_BYTES (XSTRING (str))); |
43d27a72 | 2467 | else |
fc932ac6 | 2468 | nbytes = STRING_BYTES (XSTRING (str)); |
43d27a72 RS |
2469 | |
2470 | ssl->bytes += nbytes; | |
2471 | ||
cb26008f | 2472 | if (STRINGP (str2)) |
43d27a72 RS |
2473 | { |
2474 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2475 | nbytes = XSTRING (str2)->size; | |
2476 | else if (! STRING_MULTIBYTE (str2)) | |
2477 | nbytes = count_size_as_multibyte (XSTRING (str2)->data, | |
fc932ac6 | 2478 | STRING_BYTES (XSTRING (str2))); |
43d27a72 | 2479 | else |
fc932ac6 | 2480 | nbytes = STRING_BYTES (XSTRING (str2)); |
43d27a72 RS |
2481 | |
2482 | ssl->bytes += nbytes; | |
2483 | } | |
e8185fa8 | 2484 | } |
bbbe9545 KH |
2485 | |
2486 | /* Return the concatenation of the strings associated with overlays that | |
2487 | begin or end at POS, ignoring overlays that are specific to a window | |
2488 | other than W. The strings are concatenated in the appropriate order: | |
2489 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2490 | lower. Normally all of the after-strings come first, but zero-sized |
2491 | overlays have their after-strings ride along with the before-strings | |
2492 | because it would look strange to print them inside-out. | |
2493 | ||
2494 | Returns the string length, and stores the contents indirectly through | |
2495 | PSTR, if that variable is non-null. The string may be overwritten by | |
2496 | subsequent calls. */ | |
6b5d3b89 | 2497 | |
bbbe9545 KH |
2498 | int |
2499 | overlay_strings (pos, w, pstr) | |
2500 | int pos; | |
2501 | struct window *w; | |
6b5d3b89 | 2502 | unsigned char **pstr; |
bbbe9545 | 2503 | { |
e8185fa8 | 2504 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2505 | int startpos, endpos; |
43d27a72 | 2506 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2507 | |
e8185fa8 KH |
2508 | overlay_heads.used = overlay_heads.bytes = 0; |
2509 | overlay_tails.used = overlay_tails.bytes = 0; | |
bbbe9545 KH |
2510 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
2511 | { | |
2512 | overlay = XCONS (ov)->car; | |
2513 | if (!OVERLAYP (overlay)) | |
2514 | abort (); | |
2515 | ||
2516 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2517 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2518 | if (endpos < pos) | |
2519 | break; | |
2520 | if (endpos != pos && startpos != pos) | |
2521 | continue; | |
2522 | window = Foverlay_get (overlay, Qwindow); | |
2523 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2524 | continue; | |
e8185fa8 KH |
2525 | if (startpos == pos |
2526 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2527 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2528 | (startpos == endpos |
2529 | ? Foverlay_get (overlay, Qafter_string) | |
2530 | : Qnil), | |
2531 | Foverlay_get (overlay, Qpriority), | |
2532 | endpos - startpos); | |
2533 | else if (endpos == pos | |
2534 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2535 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2536 | Foverlay_get (overlay, Qpriority), |
2537 | endpos - startpos); | |
bbbe9545 KH |
2538 | } |
2539 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) | |
2540 | { | |
2541 | overlay = XCONS (ov)->car; | |
2542 | if (!OVERLAYP (overlay)) | |
2543 | abort (); | |
2544 | ||
2545 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2546 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2547 | if (startpos > pos) | |
2548 | break; | |
e8185fa8 KH |
2549 | if (endpos != pos && startpos != pos) |
2550 | continue; | |
2551 | window = Foverlay_get (overlay, Qwindow); | |
2552 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2553 | continue; | |
e8185fa8 KH |
2554 | if (startpos == pos |
2555 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2556 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2557 | (startpos == endpos |
2558 | ? Foverlay_get (overlay, Qafter_string) | |
2559 | : Qnil), | |
2560 | Foverlay_get (overlay, Qpriority), | |
2561 | endpos - startpos); | |
2562 | else if (endpos == pos | |
2563 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2564 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2565 | Foverlay_get (overlay, Qpriority), |
2566 | endpos - startpos); | |
bbbe9545 | 2567 | } |
e8185fa8 KH |
2568 | if (overlay_tails.used > 1) |
2569 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2570 | cmp_for_strings); | |
2571 | if (overlay_heads.used > 1) | |
2572 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2573 | cmp_for_strings); | |
2574 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2575 | { |
e8185fa8 | 2576 | Lisp_Object tem; |
bbbe9545 | 2577 | int i; |
9f4d7cde | 2578 | unsigned char *p; |
e8185fa8 | 2579 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2580 | |
2581 | if (total > overlay_str_len) | |
9f4d7cde RS |
2582 | { |
2583 | overlay_str_len = total; | |
2584 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
2585 | total); | |
2586 | } | |
bbbe9545 | 2587 | p = overlay_str_buf; |
e8185fa8 | 2588 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2589 | { |
43d27a72 | 2590 | int nbytes; |
e8185fa8 | 2591 | tem = overlay_tails.buf[i].string; |
fc932ac6 RS |
2592 | nbytes = copy_text (XSTRING (tem)->data, p, |
2593 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2594 | STRING_MULTIBYTE (tem), multibyte); |
2595 | p += nbytes; | |
bbbe9545 | 2596 | } |
e8185fa8 | 2597 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2598 | { |
43d27a72 | 2599 | int nbytes; |
e8185fa8 | 2600 | tem = overlay_heads.buf[i].string; |
fc932ac6 RS |
2601 | nbytes = copy_text (XSTRING (tem)->data, p, |
2602 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2603 | STRING_MULTIBYTE (tem), multibyte); |
2604 | p += nbytes; | |
cb26008f KH |
2605 | tem = overlay_heads.buf[i].string2; |
2606 | if (STRINGP (tem)) | |
2607 | { | |
43d27a72 | 2608 | nbytes = copy_text (XSTRING (tem)->data, p, |
fc932ac6 | 2609 | STRING_BYTES (XSTRING (tem)), |
43d27a72 RS |
2610 | STRING_MULTIBYTE (tem), multibyte); |
2611 | p += nbytes; | |
cb26008f | 2612 | } |
bbbe9545 | 2613 | } |
cb26008f KH |
2614 | if (p != overlay_str_buf + total) |
2615 | abort (); | |
bbbe9545 KH |
2616 | if (pstr) |
2617 | *pstr = overlay_str_buf; | |
e8185fa8 | 2618 | return total; |
bbbe9545 | 2619 | } |
e8185fa8 | 2620 | return 0; |
bbbe9545 KH |
2621 | } |
2622 | \f | |
5c4f68f1 | 2623 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2624 | |
2eec3b4e | 2625 | void |
5c4f68f1 JB |
2626 | recenter_overlay_lists (buf, pos) |
2627 | struct buffer *buf; | |
2eec3b4e RS |
2628 | int pos; |
2629 | { | |
2630 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2631 | ||
2632 | /* See if anything in overlays_before should move to overlays_after. */ | |
2633 | ||
2634 | /* We don't strictly need prev in this loop; it should always be nil. | |
2635 | But we use it for symmetry and in case that should cease to be true | |
2636 | with some future change. */ | |
2637 | prev = Qnil; | |
5c4f68f1 | 2638 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2639 | CONSP (tail); |
2640 | prev = tail, tail = next) | |
1ab256cb | 2641 | { |
2eec3b4e RS |
2642 | next = XCONS (tail)->cdr; |
2643 | overlay = XCONS (tail)->car; | |
2644 | ||
2645 | /* If the overlay is not valid, get rid of it. */ | |
2646 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2647 | #if 1 |
2648 | abort (); | |
2649 | #else | |
2eec3b4e RS |
2650 | { |
2651 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2652 | if (!NILP (prev)) | |
2653 | XCONS (prev)->cdr = next; | |
2654 | else | |
5c4f68f1 | 2655 | buf->overlays_before = next; |
2eec3b4e RS |
2656 | tail = prev; |
2657 | continue; | |
2658 | } | |
52f8ec73 | 2659 | #endif |
1ab256cb | 2660 | |
2eec3b4e RS |
2661 | beg = OVERLAY_START (overlay); |
2662 | end = OVERLAY_END (overlay); | |
1ab256cb | 2663 | |
2eec3b4e | 2664 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2665 | { |
2eec3b4e RS |
2666 | /* OVERLAY needs to be moved. */ |
2667 | int where = OVERLAY_POSITION (beg); | |
2668 | Lisp_Object other, other_prev; | |
2669 | ||
2670 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2671 | if (!NILP (prev)) | |
2672 | XCONS (prev)->cdr = next; | |
2673 | else | |
5c4f68f1 | 2674 | buf->overlays_before = next; |
2eec3b4e RS |
2675 | |
2676 | /* Search thru overlays_after for where to put it. */ | |
2677 | other_prev = Qnil; | |
5c4f68f1 | 2678 | for (other = buf->overlays_after; |
2eec3b4e RS |
2679 | CONSP (other); |
2680 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 2681 | { |
2eec3b4e RS |
2682 | Lisp_Object otherbeg, otheroverlay, follower; |
2683 | int win; | |
2684 | ||
2685 | otheroverlay = XCONS (other)->car; | |
2686 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2687 | abort (); |
2eec3b4e RS |
2688 | |
2689 | otherbeg = OVERLAY_START (otheroverlay); | |
2690 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2691 | break; | |
1ab256cb | 2692 | } |
2eec3b4e RS |
2693 | |
2694 | /* Add TAIL to overlays_after before OTHER. */ | |
2695 | XCONS (tail)->cdr = other; | |
2696 | if (!NILP (other_prev)) | |
2697 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 2698 | else |
5c4f68f1 | 2699 | buf->overlays_after = tail; |
2eec3b4e | 2700 | tail = prev; |
1ab256cb | 2701 | } |
2eec3b4e RS |
2702 | else |
2703 | /* We've reached the things that should stay in overlays_before. | |
2704 | All the rest of overlays_before must end even earlier, | |
2705 | so stop now. */ | |
2706 | break; | |
2707 | } | |
2708 | ||
2709 | /* See if anything in overlays_after should be in overlays_before. */ | |
2710 | prev = Qnil; | |
5c4f68f1 | 2711 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2712 | CONSP (tail); |
2713 | prev = tail, tail = next) | |
2714 | { | |
2715 | next = XCONS (tail)->cdr; | |
2716 | overlay = XCONS (tail)->car; | |
2717 | ||
2718 | /* If the overlay is not valid, get rid of it. */ | |
2719 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2720 | #if 1 |
2721 | abort (); | |
2722 | #else | |
2eec3b4e RS |
2723 | { |
2724 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2725 | if (!NILP (prev)) | |
2726 | XCONS (prev)->cdr = next; | |
2727 | else | |
5c4f68f1 | 2728 | buf->overlays_after = next; |
2eec3b4e RS |
2729 | tail = prev; |
2730 | continue; | |
2731 | } | |
52f8ec73 | 2732 | #endif |
2eec3b4e RS |
2733 | |
2734 | beg = OVERLAY_START (overlay); | |
2735 | end = OVERLAY_END (overlay); | |
2736 | ||
2737 | /* Stop looking, when we know that nothing further | |
2738 | can possibly end before POS. */ | |
2739 | if (OVERLAY_POSITION (beg) > pos) | |
2740 | break; | |
2741 | ||
2742 | if (OVERLAY_POSITION (end) <= pos) | |
2743 | { | |
2744 | /* OVERLAY needs to be moved. */ | |
2745 | int where = OVERLAY_POSITION (end); | |
2746 | Lisp_Object other, other_prev; | |
2747 | ||
2748 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2749 | if (!NILP (prev)) | |
2750 | XCONS (prev)->cdr = next; | |
2751 | else | |
5c4f68f1 | 2752 | buf->overlays_after = next; |
2eec3b4e RS |
2753 | |
2754 | /* Search thru overlays_before for where to put it. */ | |
2755 | other_prev = Qnil; | |
5c4f68f1 | 2756 | for (other = buf->overlays_before; |
2eec3b4e RS |
2757 | CONSP (other); |
2758 | other_prev = other, other = XCONS (other)->cdr) | |
2759 | { | |
2760 | Lisp_Object otherend, otheroverlay; | |
2761 | int win; | |
2762 | ||
2763 | otheroverlay = XCONS (other)->car; | |
2764 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2765 | abort (); |
2eec3b4e RS |
2766 | |
2767 | otherend = OVERLAY_END (otheroverlay); | |
2768 | if (OVERLAY_POSITION (otherend) <= where) | |
2769 | break; | |
2770 | } | |
2771 | ||
2772 | /* Add TAIL to overlays_before before OTHER. */ | |
2773 | XCONS (tail)->cdr = other; | |
2774 | if (!NILP (other_prev)) | |
2775 | XCONS (other_prev)->cdr = tail; | |
2776 | else | |
5c4f68f1 | 2777 | buf->overlays_before = tail; |
2eec3b4e RS |
2778 | tail = prev; |
2779 | } | |
2780 | } | |
2781 | ||
8d7a4592 | 2782 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 2783 | } |
2b1bdf65 | 2784 | |
423cdb46 KH |
2785 | void |
2786 | adjust_overlays_for_insert (pos, length) | |
2787 | int pos; | |
2788 | int length; | |
2789 | { | |
2790 | /* After an insertion, the lists are still sorted properly, | |
2791 | but we may need to update the value of the overlay center. */ | |
2792 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
2793 | XSETFASTINT (current_buffer->overlay_center, | |
2794 | XFASTINT (current_buffer->overlay_center) + length); | |
2795 | } | |
2796 | ||
2797 | void | |
2798 | adjust_overlays_for_delete (pos, length) | |
2799 | int pos; | |
2800 | int length; | |
2801 | { | |
2802 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
2803 | /* The deletion was to our right. No change needed; the before- and | |
2804 | after-lists are still consistent. */ | |
2805 | ; | |
2806 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
2807 | /* The deletion was to our left. We need to adjust the center value | |
2808 | to account for the change in position, but the lists are consistent | |
2809 | given the new value. */ | |
2810 | XSETFASTINT (current_buffer->overlay_center, | |
2811 | XFASTINT (current_buffer->overlay_center) - length); | |
2812 | else | |
2813 | /* We're right in the middle. There might be things on the after-list | |
2814 | that now belong on the before-list. Recentering will move them, | |
2815 | and also update the center point. */ | |
2816 | recenter_overlay_lists (current_buffer, pos); | |
2817 | } | |
2818 | ||
2b1bdf65 KH |
2819 | /* Fix up overlays that were garbled as a result of permuting markers |
2820 | in the range START through END. Any overlay with at least one | |
2821 | endpoint in this range will need to be unlinked from the overlay | |
2822 | list and reinserted in its proper place. | |
2823 | Such an overlay might even have negative size at this point. | |
2824 | If so, we'll reverse the endpoints. Can you think of anything | |
2825 | better to do in this situation? */ | |
2826 | void | |
2827 | fix_overlays_in_range (start, end) | |
2828 | register int start, end; | |
2829 | { | |
2830 | Lisp_Object tem, overlay; | |
2831 | Lisp_Object before_list, after_list; | |
2832 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2833 | int startpos, endpos; | |
2834 | ||
2835 | /* This algorithm shifts links around instead of consing and GCing. | |
2836 | The loop invariant is that before_list (resp. after_list) is a | |
2837 | well-formed list except that its last element, the one that | |
2838 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2839 | So it's not a bug that before_list isn't initialized, although | |
2840 | it may look strange. */ | |
2841 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2842 | { | |
2843 | overlay = XCONS (*ptail)->car; | |
2844 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2845 | if (endpos < start) | |
2846 | break; | |
2847 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2848 | if (endpos < end | |
2849 | || (startpos >= start && startpos < end)) | |
2850 | { | |
2851 | /* If the overlay is backwards, fix that now. */ | |
2852 | if (startpos > endpos) | |
2853 | { | |
2854 | int tem; | |
2c99f3ea RS |
2855 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
2856 | Qnil); | |
2857 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
2858 | Qnil); | |
2b1bdf65 KH |
2859 | tem = startpos; startpos = endpos; endpos = tem; |
2860 | } | |
2861 | /* Add it to the end of the wrong list. Later on, | |
2862 | recenter_overlay_lists will move it to the right place. */ | |
2863 | if (endpos < XINT (current_buffer->overlay_center)) | |
2864 | { | |
2865 | *pafter = *ptail; | |
2866 | pafter = &XCONS (*ptail)->cdr; | |
2867 | } | |
2868 | else | |
2869 | { | |
2870 | *pbefore = *ptail; | |
2871 | pbefore = &XCONS (*ptail)->cdr; | |
2872 | } | |
2873 | *ptail = XCONS (*ptail)->cdr; | |
2874 | } | |
2875 | else | |
2876 | ptail = &XCONS (*ptail)->cdr; | |
2877 | } | |
2878 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2879 | { | |
2880 | overlay = XCONS (*ptail)->car; | |
2881 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2882 | if (startpos >= end) | |
2883 | break; | |
2884 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2885 | if (startpos >= start | |
2886 | || (endpos >= start && endpos < end)) | |
2887 | { | |
2888 | if (startpos > endpos) | |
2889 | { | |
2890 | int tem; | |
2c99f3ea RS |
2891 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
2892 | Qnil); | |
2893 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
2894 | Qnil); | |
2b1bdf65 KH |
2895 | tem = startpos; startpos = endpos; endpos = tem; |
2896 | } | |
2897 | if (endpos < XINT (current_buffer->overlay_center)) | |
2898 | { | |
2899 | *pafter = *ptail; | |
2900 | pafter = &XCONS (*ptail)->cdr; | |
2901 | } | |
2902 | else | |
2903 | { | |
2904 | *pbefore = *ptail; | |
2905 | pbefore = &XCONS (*ptail)->cdr; | |
2906 | } | |
2907 | *ptail = XCONS (*ptail)->cdr; | |
2908 | } | |
2909 | else | |
2910 | ptail = &XCONS (*ptail)->cdr; | |
2911 | } | |
2912 | ||
2913 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2914 | and let the recenter function make it sane again. */ | |
2915 | *pbefore = current_buffer->overlays_before; | |
2916 | current_buffer->overlays_before = before_list; | |
2917 | recenter_overlay_lists (current_buffer, | |
2918 | XINT (current_buffer->overlay_center)); | |
2919 | ||
2920 | *pafter = current_buffer->overlays_after; | |
2921 | current_buffer->overlays_after = after_list; | |
2922 | recenter_overlay_lists (current_buffer, | |
2923 | XINT (current_buffer->overlay_center)); | |
2924 | } | |
3b06f880 KH |
2925 | |
2926 | /* We have two types of overlay: the one whose ending marker is | |
2927 | after-insertion-marker (this is the usual case) and the one whose | |
2928 | ending marker is before-insertion-marker. When `overlays_before' | |
2929 | contains overlays of the latter type and the former type in this | |
2930 | order and both overlays end at inserting position, inserting a text | |
2931 | increases only the ending marker of the latter type, which results | |
2932 | in incorrect ordering of `overlays_before'. | |
2933 | ||
2934 | This function fixes ordering of overlays in the slot | |
2935 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
2936 | was at PREV, and now is at POS. */ | |
2937 | ||
01136e9b | 2938 | void |
3b06f880 KH |
2939 | fix_overlays_before (bp, prev, pos) |
2940 | struct buffer *bp; | |
2941 | int prev, pos; | |
2942 | { | |
2943 | Lisp_Object *tailp = &bp->overlays_before; | |
2944 | Lisp_Object *right_place; | |
2945 | int end; | |
2946 | ||
2947 | /* After the insertion, the several overlays may be in incorrect | |
2948 | order. The possibility is that, in the list `overlays_before', | |
2949 | an overlay which ends at POS appears after an overlay which ends | |
2950 | at PREV. Since POS is greater than PREV, we must fix the | |
2951 | ordering of these overlays, by moving overlays ends at POS before | |
2952 | the overlays ends at PREV. */ | |
2953 | ||
2954 | /* At first, find a place where disordered overlays should be linked | |
2955 | in. It is where an overlay which end before POS exists. (i.e. an | |
2956 | overlay whose ending marker is after-insertion-marker if disorder | |
2957 | exists). */ | |
2958 | while (!NILP (*tailp) | |
2959 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car))) | |
2960 | >= pos)) | |
2961 | tailp = &XCONS (*tailp)->cdr; | |
2962 | ||
2963 | /* If we don't find such an overlay, | |
2964 | or the found one ends before PREV, | |
2965 | or the found one is the last one in the list, | |
2966 | we don't have to fix anything. */ | |
2967 | if (NILP (*tailp) | |
2968 | || end < prev | |
2969 | || NILP (XCONS (*tailp)->cdr)) | |
2970 | return; | |
2971 | ||
2972 | right_place = tailp; | |
2973 | tailp = &XCONS (*tailp)->cdr; | |
2974 | ||
2975 | /* Now, end position of overlays in the list *TAILP should be before | |
2976 | or equal to PREV. In the loop, an overlay which ends at POS is | |
2977 | moved ahead to the place pointed by RIGHT_PLACE. If we found an | |
2978 | overlay which ends before PREV, the remaining overlays are in | |
2979 | correct order. */ | |
2980 | while (!NILP (*tailp)) | |
2981 | { | |
2982 | end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car)); | |
2983 | ||
2984 | if (end == pos) | |
2985 | { /* This overlay is disordered. */ | |
2986 | Lisp_Object found = *tailp; | |
2987 | ||
2988 | /* Unlink the found overlay. */ | |
2989 | *tailp = XCONS (found)->cdr; | |
2990 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ | |
2991 | XCONS (found)->cdr = *right_place; | |
2992 | /* Link it into the right place. */ | |
2993 | *right_place = found; | |
2994 | } | |
2995 | else if (end == prev) | |
2996 | tailp = &XCONS (*tailp)->cdr; | |
2997 | else /* No more disordered overlay. */ | |
2998 | break; | |
2999 | } | |
3000 | } | |
2eec3b4e | 3001 | \f |
52f8ec73 JB |
3002 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
3003 | "Return t if OBJECT is an overlay.") | |
3004 | (object) | |
3005 | Lisp_Object object; | |
3006 | { | |
3007 | return (OVERLAYP (object) ? Qt : Qnil); | |
3008 | } | |
3009 | ||
acac2700 | 3010 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
3011 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
3012 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
3013 | BEG and END may be integers or markers.\n\ |
3014 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
3015 | front delimiter advance when text is inserted there.\n\ | |
3016 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
3017 | rear delimiter advance when text is inserted there.") | |
3018 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3019 | Lisp_Object beg, end, buffer; |
acac2700 | 3020 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3021 | { |
3022 | Lisp_Object overlay; | |
5c4f68f1 | 3023 | struct buffer *b; |
2eec3b4e | 3024 | |
5c4f68f1 | 3025 | if (NILP (buffer)) |
67180c6a | 3026 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
3027 | else |
3028 | CHECK_BUFFER (buffer, 2); | |
3029 | if (MARKERP (beg) | |
3030 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3031 | error ("Marker points into wrong buffer"); | |
3032 | if (MARKERP (end) | |
3033 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3034 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3035 | |
883047b9 JB |
3036 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3037 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 3038 | |
883047b9 | 3039 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3040 | { |
c99fc30f KH |
3041 | Lisp_Object temp; |
3042 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3043 | } |
883047b9 JB |
3044 | |
3045 | b = XBUFFER (buffer); | |
3046 | ||
3047 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3048 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3049 | |
acac2700 RS |
3050 | if (!NILP (front_advance)) |
3051 | XMARKER (beg)->insertion_type = 1; | |
3052 | if (!NILP (rear_advance)) | |
3053 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3054 | |
48e2e3ba | 3055 | overlay = allocate_misc (); |
89ca3e1b | 3056 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3057 | XOVERLAY (overlay)->start = beg; |
3058 | XOVERLAY (overlay)->end = end; | |
3059 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3060 | |
3061 | /* Put the new overlay on the wrong list. */ | |
3062 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3063 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3064 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3065 | else |
5c4f68f1 | 3066 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3067 | |
3068 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3069 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3070 | |
b61982dd JB |
3071 | /* We don't need to redisplay the region covered by the overlay, because |
3072 | the overlay has no properties at the moment. */ | |
3073 | ||
2eec3b4e RS |
3074 | return overlay; |
3075 | } | |
876aa27c RS |
3076 | \f |
3077 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3078 | ||
3079 | static void | |
3080 | modify_overlay (buf, start, end) | |
3081 | struct buffer *buf; | |
3082 | int start, end; | |
3083 | { | |
3084 | if (start == end) | |
3085 | return; | |
3086 | ||
3087 | if (start > end) | |
3088 | { | |
3089 | int temp = start; | |
3090 | start = end; end = temp; | |
3091 | } | |
3092 | ||
3093 | /* If this is a buffer not in the selected window, | |
3094 | we must do other windows. */ | |
3095 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3096 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3097 | /* If multiple windows show this buffer, we must do other windows. */ |
3098 | else if (buffer_shared > 1) | |
3099 | windows_or_buffers_changed = 1; | |
3100 | else | |
b5a225b4 | 3101 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
876aa27c | 3102 | |
d8b9150f | 3103 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3104 | } |
2eec3b4e | 3105 | |
876aa27c | 3106 | \f\f |
2e34157c RS |
3107 | Lisp_Object Fdelete_overlay (); |
3108 | ||
5c4f68f1 JB |
3109 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
3110 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
3111 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
3112 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
3113 | buffer.") | |
5c4f68f1 JB |
3114 | (overlay, beg, end, buffer) |
3115 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 3116 | { |
0a4469c9 RS |
3117 | struct buffer *b, *ob; |
3118 | Lisp_Object obuffer; | |
3119 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 3120 | |
52f8ec73 | 3121 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
3122 | if (NILP (buffer)) |
3123 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3124 | if (NILP (buffer)) |
67180c6a | 3125 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 3126 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
3127 | |
3128 | if (MARKERP (beg) | |
3129 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3130 | error ("Marker points into wrong buffer"); | |
3131 | if (MARKERP (end) | |
3132 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3133 | error ("Marker points into wrong buffer"); | |
3134 | ||
b61982dd JB |
3135 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3136 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3137 | ||
9d7608b7 KH |
3138 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3139 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3140 | |
b61982dd JB |
3141 | if (XINT (beg) > XINT (end)) |
3142 | { | |
c99fc30f KH |
3143 | Lisp_Object temp; |
3144 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3145 | } |
3146 | ||
9d7608b7 KH |
3147 | specbind (Qinhibit_quit, Qt); |
3148 | ||
0a4469c9 | 3149 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3150 | b = XBUFFER (buffer); |
0a4469c9 | 3151 | ob = XBUFFER (obuffer); |
2eec3b4e | 3152 | |
c82ed728 | 3153 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3154 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3155 | { |
3156 | /* Redisplay where the overlay was. */ | |
3157 | if (!NILP (obuffer)) | |
3158 | { | |
2e34157c RS |
3159 | int o_beg; |
3160 | int o_end; | |
50760c4a | 3161 | |
80509f2f RS |
3162 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3163 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3164 | |
2e34157c | 3165 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3166 | } |
3167 | ||
3168 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3169 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3170 | } |
c82ed728 JB |
3171 | else |
3172 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3173 | { | |
2e34157c | 3174 | int o_beg, o_end; |
c82ed728 JB |
3175 | int change_beg, change_end; |
3176 | ||
80509f2f RS |
3177 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3178 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3179 | |
2e34157c RS |
3180 | if (o_beg == XINT (beg)) |
3181 | modify_overlay (b, o_end, XINT (end)); | |
3182 | else if (o_end == XINT (end)) | |
3183 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3184 | else |
3185 | { | |
2e34157c RS |
3186 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3187 | if (XINT (end) > o_end) o_end = XINT (end); | |
3188 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3189 | } |
3190 | } | |
b61982dd | 3191 | |
0a4469c9 RS |
3192 | if (!NILP (obuffer)) |
3193 | { | |
3194 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3195 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3196 | } | |
5c4f68f1 JB |
3197 | |
3198 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3199 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3200 | |
3201 | /* Put the overlay on the wrong list. */ | |
3202 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3203 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3204 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3205 | else |
5c4f68f1 | 3206 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3207 | |
3208 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3209 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3210 | |
0a4469c9 | 3211 | return unbind_to (count, overlay); |
2eec3b4e RS |
3212 | } |
3213 | ||
3214 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 3215 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 3216 | (overlay) |
5c4f68f1 | 3217 | Lisp_Object overlay; |
2eec3b4e | 3218 | { |
0a4469c9 | 3219 | Lisp_Object buffer; |
5c4f68f1 | 3220 | struct buffer *b; |
0a4469c9 | 3221 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 3222 | |
52f8ec73 JB |
3223 | CHECK_OVERLAY (overlay, 0); |
3224 | ||
0a4469c9 RS |
3225 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3226 | if (NILP (buffer)) | |
3227 | return Qnil; | |
3228 | ||
3229 | b = XBUFFER (buffer); | |
3230 | ||
3231 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
3232 | |
3233 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
3234 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
3235 | ||
876aa27c | 3236 | modify_overlay (b, |
8231a9aa RS |
3237 | marker_position (OVERLAY_START (overlay)), |
3238 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 3239 | |
3ece337a JB |
3240 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3241 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3242 | ||
0a4469c9 | 3243 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3244 | } |
3245 | \f | |
8ebafa8d JB |
3246 | /* Overlay dissection functions. */ |
3247 | ||
3248 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
3249 | "Return the position at which OVERLAY starts.") | |
3250 | (overlay) | |
3251 | Lisp_Object overlay; | |
3252 | { | |
3253 | CHECK_OVERLAY (overlay, 0); | |
3254 | ||
3255 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3256 | } | |
3257 | ||
3258 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
3259 | "Return the position at which OVERLAY ends.") | |
3260 | (overlay) | |
3261 | Lisp_Object overlay; | |
3262 | { | |
3263 | CHECK_OVERLAY (overlay, 0); | |
3264 | ||
3265 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3266 | } | |
3267 | ||
3268 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
3269 | "Return the buffer OVERLAY belongs to.") | |
3270 | (overlay) | |
3271 | Lisp_Object overlay; | |
3272 | { | |
3273 | CHECK_OVERLAY (overlay, 0); | |
3274 | ||
3275 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3276 | } | |
3277 | ||
3278 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
3279 | "Return a list of the properties on OVERLAY.\n\ | |
3280 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
3281 | OVERLAY.") | |
3282 | (overlay) | |
3283 | Lisp_Object overlay; | |
3284 | { | |
3285 | CHECK_OVERLAY (overlay, 0); | |
3286 | ||
48e2e3ba | 3287 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3288 | } |
3289 | ||
3290 | \f | |
2eec3b4e | 3291 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 3292 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
3293 | (pos) |
3294 | Lisp_Object pos; | |
3295 | { | |
3296 | int noverlays; | |
2eec3b4e RS |
3297 | Lisp_Object *overlay_vec; |
3298 | int len; | |
3299 | Lisp_Object result; | |
3300 | ||
3301 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3302 | ||
3303 | len = 10; | |
3304 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3305 | ||
3306 | /* Put all the overlays we want in a vector in overlay_vec. | |
3307 | Store the length in len. */ | |
2a77a7d7 RS |
3308 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3309 | (int *) 0, (int *) 0); | |
2eec3b4e RS |
3310 | |
3311 | /* Make a list of them all. */ | |
3312 | result = Flist (noverlays, overlay_vec); | |
3313 | ||
9ac0d9e0 | 3314 | xfree (overlay_vec); |
2eec3b4e RS |
3315 | return result; |
3316 | } | |
3317 | ||
74514898 | 3318 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
3319 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
3320 | Overlap means that at least one character is contained within the overlay\n\ | |
3321 | and also contained within the specified region.\n\ | |
3322 | Empty overlays are included in the result if they are located at BEG\n\ | |
3323 | or between BEG and END.") | |
74514898 RS |
3324 | (beg, end) |
3325 | Lisp_Object beg, end; | |
3326 | { | |
3327 | int noverlays; | |
3328 | Lisp_Object *overlay_vec; | |
3329 | int len; | |
3330 | Lisp_Object result; | |
3331 | ||
3332 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
3333 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
3334 | ||
3335 | len = 10; | |
3336 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3337 | ||
3338 | /* Put all the overlays we want in a vector in overlay_vec. | |
3339 | Store the length in len. */ | |
3340 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3341 | (int *) 0, (int *) 0); | |
3342 | ||
3343 | /* Make a list of them all. */ | |
3344 | result = Flist (noverlays, overlay_vec); | |
3345 | ||
3346 | xfree (overlay_vec); | |
3347 | return result; | |
3348 | } | |
3349 | ||
2eec3b4e RS |
3350 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
3351 | 1, 1, 0, | |
bbe20e81 KH |
3352 | "Return the next position after POS where an overlay starts or ends.\n\ |
3353 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
3354 | (pos) |
3355 | Lisp_Object pos; | |
3356 | { | |
3357 | int noverlays; | |
3358 | int endpos; | |
3359 | Lisp_Object *overlay_vec; | |
3360 | int len; | |
2eec3b4e RS |
3361 | int i; |
3362 | ||
3363 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3364 | ||
3365 | len = 10; | |
3366 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3367 | ||
3368 | /* Put all the overlays we want in a vector in overlay_vec. | |
3369 | Store the length in len. | |
3370 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 RS |
3371 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3372 | &endpos, (int *) 0); | |
2eec3b4e RS |
3373 | |
3374 | /* If any of these overlays ends before endpos, | |
3375 | use its ending point instead. */ | |
3376 | for (i = 0; i < noverlays; i++) | |
3377 | { | |
3378 | Lisp_Object oend; | |
3379 | int oendpos; | |
3380 | ||
3381 | oend = OVERLAY_END (overlay_vec[i]); | |
3382 | oendpos = OVERLAY_POSITION (oend); | |
3383 | if (oendpos < endpos) | |
3384 | endpos = oendpos; | |
1ab256cb RM |
3385 | } |
3386 | ||
9ac0d9e0 | 3387 | xfree (overlay_vec); |
2eec3b4e RS |
3388 | return make_number (endpos); |
3389 | } | |
239c932b RS |
3390 | |
3391 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3392 | Sprevious_overlay_change, 1, 1, 0, | |
3393 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 3394 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
3395 | (pos) |
3396 | Lisp_Object pos; | |
3397 | { | |
3398 | int noverlays; | |
3399 | int prevpos; | |
3400 | Lisp_Object *overlay_vec; | |
3401 | int len; | |
3402 | int i; | |
624bbdc4 | 3403 | Lisp_Object tail; |
239c932b RS |
3404 | |
3405 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3406 | ||
3407 | len = 10; | |
3408 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3409 | ||
624bbdc4 RS |
3410 | /* At beginning of buffer, we know the answer; |
3411 | avoid bug subtracting 1 below. */ | |
3412 | if (XINT (pos) == BEGV) | |
3413 | return pos; | |
3414 | ||
239c932b RS |
3415 | /* Put all the overlays we want in a vector in overlay_vec. |
3416 | Store the length in len. | |
daa1c109 | 3417 | prevpos gets the position of the previous change. */ |
2a77a7d7 RS |
3418 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3419 | (int *) 0, &prevpos); | |
239c932b | 3420 | |
239c932b RS |
3421 | xfree (overlay_vec); |
3422 | return make_number (prevpos); | |
3423 | } | |
2eec3b4e RS |
3424 | \f |
3425 | /* These functions are for debugging overlays. */ | |
3426 | ||
3427 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
3428 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
3429 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 3430 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
3431 | Recentering overlays moves overlays between these lists.\n\ |
3432 | The lists you get are copies, so that changing them has no effect.\n\ | |
3433 | However, the overlays you get are the real objects that the buffer uses.") | |
3434 | () | |
3435 | { | |
3436 | Lisp_Object before, after; | |
3437 | before = current_buffer->overlays_before; | |
3438 | if (CONSP (before)) | |
3439 | before = Fcopy_sequence (before); | |
3440 | after = current_buffer->overlays_after; | |
3441 | if (CONSP (after)) | |
3442 | after = Fcopy_sequence (after); | |
3443 | ||
3444 | return Fcons (before, after); | |
3445 | } | |
3446 | ||
3447 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3448 | "Recenter the overlays of the current buffer around position POS.") | |
3449 | (pos) | |
3450 | Lisp_Object pos; | |
3451 | { | |
3452 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3453 | ||
5c4f68f1 | 3454 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3455 | return Qnil; |
3456 | } | |
3457 | \f | |
3458 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3459 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3460 | (overlay, prop) |
3461 | Lisp_Object overlay, prop; | |
3462 | { | |
cab4777e | 3463 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3464 | |
3465 | CHECK_OVERLAY (overlay, 0); | |
3466 | ||
cab4777e RS |
3467 | fallback = Qnil; |
3468 | ||
48e2e3ba | 3469 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3470 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
3471 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
3472 | { | |
3473 | if (EQ (XCONS (plist)->car, prop)) | |
3474 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
3475 | else if (EQ (XCONS (plist)->car, Qcategory)) |
3476 | { | |
3477 | Lisp_Object tem; | |
3478 | tem = Fcar (Fcdr (plist)); | |
3479 | if (SYMBOLP (tem)) | |
3480 | fallback = Fget (tem, prop); | |
3481 | } | |
2eec3b4e | 3482 | } |
52f8ec73 | 3483 | |
cab4777e | 3484 | return fallback; |
2eec3b4e RS |
3485 | } |
3486 | ||
3487 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3488 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3489 | (overlay, prop, value) | |
3490 | Lisp_Object overlay, prop, value; | |
3491 | { | |
48e2e3ba | 3492 | Lisp_Object tail, buffer; |
9d7608b7 | 3493 | int changed; |
2eec3b4e | 3494 | |
52f8ec73 | 3495 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3496 | |
274a9425 RS |
3497 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3498 | ||
48e2e3ba | 3499 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3500 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
3501 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
3502 | if (EQ (XCONS (tail)->car, prop)) |
3503 | { | |
9d7608b7 KH |
3504 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
3505 | XCONS (XCONS (tail)->cdr)->car = value; | |
3506 | goto found; | |
274a9425 | 3507 | } |
9d7608b7 KH |
3508 | /* It wasn't in the list, so add it to the front. */ |
3509 | changed = !NILP (value); | |
48e2e3ba KH |
3510 | XOVERLAY (overlay)->plist |
3511 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3512 | found: |
3513 | if (! NILP (buffer)) | |
3514 | { | |
3515 | if (changed) | |
876aa27c | 3516 | modify_overlay (XBUFFER (buffer), |
9d7608b7 KH |
3517 | marker_position (OVERLAY_START (overlay)), |
3518 | marker_position (OVERLAY_END (overlay))); | |
3519 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3520 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3521 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3522 | Fdelete_overlay (overlay); | |
3523 | } | |
2eec3b4e | 3524 | return value; |
1ab256cb RM |
3525 | } |
3526 | \f | |
9115729e KH |
3527 | /* Subroutine of report_overlay_modification. */ |
3528 | ||
3529 | /* Lisp vector holding overlay hook functions to call. | |
3530 | Vector elements come in pairs. | |
3531 | Each even-index element is a list of hook functions. | |
3532 | The following odd-index element is the overlay they came from. | |
3533 | ||
3534 | Before the buffer change, we fill in this vector | |
3535 | as we call overlay hook functions. | |
3536 | After the buffer change, we get the functions to call from this vector. | |
3537 | This way we always call the same functions before and after the change. */ | |
3538 | static Lisp_Object last_overlay_modification_hooks; | |
3539 | ||
3540 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3541 | static int last_overlay_modification_hooks_used; | |
3542 | ||
3543 | /* Add one functionlist/overlay pair | |
3544 | to the end of last_overlay_modification_hooks. */ | |
3545 | ||
3546 | static void | |
3547 | add_overlay_mod_hooklist (functionlist, overlay) | |
3548 | Lisp_Object functionlist, overlay; | |
3549 | { | |
3550 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3551 | ||
3552 | if (last_overlay_modification_hooks_used == oldsize) | |
3553 | { | |
3554 | Lisp_Object old; | |
3555 | old = last_overlay_modification_hooks; | |
3556 | last_overlay_modification_hooks | |
3557 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3558 | bcopy (XVECTOR (old)->contents, |
3559 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3560 | sizeof (Lisp_Object) * oldsize); |
3561 | } | |
3562 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3563 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3564 | } | |
3565 | \f | |
173f2a64 RS |
3566 | /* Run the modification-hooks of overlays that include |
3567 | any part of the text in START to END. | |
9115729e KH |
3568 | If this change is an insertion, also |
3569 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3570 | and the insert-after-hooks of overlay ending at START. |
3571 | ||
3572 | This is called both before and after the modification. | |
3573 | AFTER is nonzero when we call after the modification. | |
3574 | ||
9115729e KH |
3575 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3576 | When AFTER is nonzero, they are the start position, | |
3577 | the position after the inserted new text, | |
3578 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3579 | |
3580 | void | |
930a9140 | 3581 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3582 | Lisp_Object start, end; |
930a9140 RS |
3583 | int after; |
3584 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3585 | { |
3586 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3587 | /* 1 if this change is an insertion. */ |
3588 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3589 | int tail_copied; |
930a9140 | 3590 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3591 | |
3592 | overlay = Qnil; | |
3593 | tail = Qnil; | |
930a9140 | 3594 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3595 | |
9115729e KH |
3596 | if (after) |
3597 | { | |
3598 | /* Call the functions recorded in last_overlay_modification_hooks | |
3599 | rather than scanning the overlays again. | |
3600 | First copy the vector contents, in case some of these hooks | |
3601 | do subsequent modification of the buffer. */ | |
3602 | int size = last_overlay_modification_hooks_used; | |
3603 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3604 | int i; | |
3605 | ||
3606 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3607 | copy, size * sizeof (Lisp_Object)); | |
3608 | gcpro1.var = copy; | |
3609 | gcpro1.nvars = size; | |
3610 | ||
3611 | for (i = 0; i < size;) | |
3612 | { | |
3613 | Lisp_Object prop, overlay; | |
3614 | prop = copy[i++]; | |
3615 | overlay = copy[i++]; | |
3616 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3617 | } | |
3618 | UNGCPRO; | |
3619 | return; | |
3620 | } | |
3621 | ||
3622 | /* We are being called before a change. | |
3623 | Scan the overlays to find the functions to call. */ | |
3624 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3625 | tail_copied = 0; |
173f2a64 RS |
3626 | for (tail = current_buffer->overlays_before; |
3627 | CONSP (tail); | |
3628 | tail = XCONS (tail)->cdr) | |
3629 | { | |
3630 | int startpos, endpos; | |
be8b1c6b | 3631 | Lisp_Object ostart, oend; |
173f2a64 RS |
3632 | |
3633 | overlay = XCONS (tail)->car; | |
3634 | ||
3635 | ostart = OVERLAY_START (overlay); | |
3636 | oend = OVERLAY_END (overlay); | |
3637 | endpos = OVERLAY_POSITION (oend); | |
3638 | if (XFASTINT (start) > endpos) | |
3639 | break; | |
3640 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3641 | if (insertion && (XFASTINT (start) == startpos |
3642 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3643 | { |
3644 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3645 | if (!NILP (prop)) |
3646 | { | |
3647 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3648 | if (!tail_copied) |
3649 | tail = Fcopy_sequence (tail); | |
3650 | tail_copied = 1; | |
930a9140 | 3651 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3652 | } |
173f2a64 | 3653 | } |
9115729e KH |
3654 | if (insertion && (XFASTINT (start) == endpos |
3655 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3656 | { |
3657 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3658 | if (!NILP (prop)) |
3659 | { | |
55b48893 RS |
3660 | if (!tail_copied) |
3661 | tail = Fcopy_sequence (tail); | |
3662 | tail_copied = 1; | |
930a9140 | 3663 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3664 | } |
173f2a64 | 3665 | } |
3bd13e92 KH |
3666 | /* Test for intersecting intervals. This does the right thing |
3667 | for both insertion and deletion. */ | |
3668 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3669 | { |
3670 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3671 | if (!NILP (prop)) |
3672 | { | |
55b48893 RS |
3673 | if (!tail_copied) |
3674 | tail = Fcopy_sequence (tail); | |
3675 | tail_copied = 1; | |
930a9140 | 3676 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3677 | } |
173f2a64 RS |
3678 | } |
3679 | } | |
3680 | ||
55b48893 | 3681 | tail_copied = 0; |
173f2a64 RS |
3682 | for (tail = current_buffer->overlays_after; |
3683 | CONSP (tail); | |
3684 | tail = XCONS (tail)->cdr) | |
3685 | { | |
3686 | int startpos, endpos; | |
be8b1c6b | 3687 | Lisp_Object ostart, oend; |
173f2a64 RS |
3688 | |
3689 | overlay = XCONS (tail)->car; | |
3690 | ||
3691 | ostart = OVERLAY_START (overlay); | |
3692 | oend = OVERLAY_END (overlay); | |
3693 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3694 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3695 | if (XFASTINT (end) < startpos) |
3696 | break; | |
9115729e KH |
3697 | if (insertion && (XFASTINT (start) == startpos |
3698 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3699 | { |
3700 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3701 | if (!NILP (prop)) |
3702 | { | |
55b48893 RS |
3703 | if (!tail_copied) |
3704 | tail = Fcopy_sequence (tail); | |
3705 | tail_copied = 1; | |
930a9140 | 3706 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3707 | } |
173f2a64 | 3708 | } |
9115729e KH |
3709 | if (insertion && (XFASTINT (start) == endpos |
3710 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3711 | { |
3712 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3713 | if (!NILP (prop)) |
3714 | { | |
55b48893 RS |
3715 | if (!tail_copied) |
3716 | tail = Fcopy_sequence (tail); | |
3717 | tail_copied = 1; | |
930a9140 | 3718 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3719 | } |
173f2a64 | 3720 | } |
3bd13e92 KH |
3721 | /* Test for intersecting intervals. This does the right thing |
3722 | for both insertion and deletion. */ | |
3723 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3724 | { |
3725 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3726 | if (!NILP (prop)) |
3727 | { | |
55b48893 RS |
3728 | if (!tail_copied) |
3729 | tail = Fcopy_sequence (tail); | |
3730 | tail_copied = 1; | |
930a9140 | 3731 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3732 | } |
173f2a64 RS |
3733 | } |
3734 | } | |
55b48893 RS |
3735 | |
3736 | UNGCPRO; | |
173f2a64 RS |
3737 | } |
3738 | ||
3739 | static void | |
930a9140 RS |
3740 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3741 | Lisp_Object list, overlay; | |
3742 | int after; | |
3743 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3744 | { |
930a9140 | 3745 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3746 | |
930a9140 | 3747 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3748 | if (! after) |
3749 | add_overlay_mod_hooklist (list, overlay); | |
3750 | ||
173f2a64 RS |
3751 | while (!NILP (list)) |
3752 | { | |
930a9140 RS |
3753 | if (NILP (arg3)) |
3754 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3755 | else | |
3756 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3757 | list = Fcdr (list); |
3758 | } | |
3759 | UNGCPRO; | |
3760 | } | |
9d7608b7 KH |
3761 | |
3762 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3763 | property is set. */ | |
3764 | void | |
3765 | evaporate_overlays (pos) | |
3766 | int pos; | |
3767 | { | |
3768 | Lisp_Object tail, overlay, hit_list; | |
3769 | ||
3770 | hit_list = Qnil; | |
3771 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
3772 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
3773 | tail = XCONS (tail)->cdr) | |
3774 | { | |
3775 | int endpos; | |
3776 | overlay = XCONS (tail)->car; | |
3777 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3778 | if (endpos < pos) | |
3779 | break; | |
3780 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 3781 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3782 | hit_list = Fcons (overlay, hit_list); |
3783 | } | |
3784 | else | |
3785 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
3786 | tail = XCONS (tail)->cdr) | |
3787 | { | |
3788 | int startpos; | |
889bf329 | 3789 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
3790 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3791 | if (startpos > pos) | |
3792 | break; | |
3793 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 3794 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3795 | hit_list = Fcons (overlay, hit_list); |
3796 | } | |
3797 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
3798 | Fdelete_overlay (XCONS (hit_list)->car); | |
3799 | } | |
173f2a64 | 3800 | \f |
54dfdeb0 | 3801 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
3802 | in the slot with offset OFFSET. */ |
3803 | ||
0fa3ba92 | 3804 | void |
54dfdeb0 KH |
3805 | buffer_slot_type_mismatch (offset) |
3806 | int offset; | |
0fa3ba92 | 3807 | { |
54dfdeb0 | 3808 | Lisp_Object sym; |
0fa3ba92 | 3809 | char *type_name; |
54dfdeb0 | 3810 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
3811 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
3812 | { | |
3813 | case Lisp_Int: type_name = "integers"; break; | |
3814 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 3815 | case Lisp_Symbol: type_name = "symbols"; break; |
1bf08baf | 3816 | |
0fa3ba92 JB |
3817 | default: |
3818 | abort (); | |
3819 | } | |
3820 | ||
1bf08baf | 3821 | error ("Only %s should be stored in the buffer-local variable %s", |
54dfdeb0 | 3822 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
3823 | } |
3824 | \f | |
dfcf069d | 3825 | void |
1ab256cb RM |
3826 | init_buffer_once () |
3827 | { | |
3828 | register Lisp_Object tem; | |
3829 | ||
13de9290 RS |
3830 | buffer_permanent_local_flags = 0; |
3831 | ||
1ab256cb RM |
3832 | /* Make sure all markable slots in buffer_defaults |
3833 | are initialized reasonably, so mark_buffer won't choke. */ | |
3834 | reset_buffer (&buffer_defaults); | |
13de9290 | 3835 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 3836 | reset_buffer (&buffer_local_symbols); |
13de9290 | 3837 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
3838 | /* Prevent GC from getting confused. */ |
3839 | buffer_defaults.text = &buffer_defaults.own_text; | |
3840 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
3841 | #ifdef USE_TEXT_PROPERTIES | |
3842 | BUF_INTERVALS (&buffer_defaults) = 0; | |
3843 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3844 | #endif | |
67180c6a KH |
3845 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3846 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
3847 | |
3848 | /* Set up the default values of various buffer slots. */ | |
3849 | /* Must do these before making the first buffer! */ | |
3850 | ||
3851 | /* real setup is done in loaddefs.el */ | |
3852 | buffer_defaults.mode_line_format = build_string ("%-"); | |
045dee35 | 3853 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
3854 | buffer_defaults.abbrev_mode = Qnil; |
3855 | buffer_defaults.overwrite_mode = Qnil; | |
3856 | buffer_defaults.case_fold_search = Qt; | |
3857 | buffer_defaults.auto_fill_function = Qnil; | |
3858 | buffer_defaults.selective_display = Qnil; | |
3859 | #ifndef old | |
3860 | buffer_defaults.selective_display_ellipses = Qt; | |
3861 | #endif | |
3862 | buffer_defaults.abbrev_table = Qnil; | |
3863 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 3864 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 3865 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 3866 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
3867 | buffer_defaults.overlays_before = Qnil; |
3868 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 3869 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 3870 | |
8d7a4592 | 3871 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
3872 | buffer_defaults.truncate_lines = Qnil; |
3873 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 3874 | buffer_defaults.direction_reversed = Qnil; |
1ab256cb | 3875 | |
f7975d07 | 3876 | #ifdef DOS_NT |
0776cb1b | 3877 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 3878 | #endif |
a1a17b61 | 3879 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 3880 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
3881 | XSETFASTINT (buffer_defaults.fill_column, 70); |
3882 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 3883 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 3884 | buffer_defaults.file_truename = Qnil; |
7962a441 | 3885 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
3886 | buffer_defaults.indicate_empty_lines = Qnil; |
3887 | buffer_defaults.scroll_up_aggressively = Qnil; | |
3888 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 3889 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
3890 | |
3891 | /* Assign the local-flags to the slots that have default values. | |
3892 | The local flag is a bit that is used in the buffer | |
3893 | to say that it has its own local value for the slot. | |
3894 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
3895 | ||
3896 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 3897 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
3898 | |
3899 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
3900 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
3901 | XSETINT (buffer_local_flags.filename, -1); |
3902 | XSETINT (buffer_local_flags.directory, -1); | |
3903 | XSETINT (buffer_local_flags.backed_up, -1); | |
3904 | XSETINT (buffer_local_flags.save_length, -1); | |
3905 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
3906 | XSETINT (buffer_local_flags.read_only, -1); | |
3907 | XSETINT (buffer_local_flags.major_mode, -1); | |
3908 | XSETINT (buffer_local_flags.mode_name, -1); | |
3909 | XSETINT (buffer_local_flags.undo_list, -1); | |
3910 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 3911 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 3912 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 3913 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 3914 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 3915 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 3916 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 3917 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 KH |
3918 | |
3919 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
3920 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
3921 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
3922 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
3923 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
3924 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 3925 | #ifndef old |
8d7a4592 | 3926 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 3927 | #endif |
8d7a4592 KH |
3928 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
3929 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
3930 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
3931 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
3932 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
3933 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
3934 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
f7975d07 | 3935 | #ifdef DOS_NT |
8d7a4592 | 3936 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
13de9290 RS |
3937 | /* Make this one a permanent local. */ |
3938 | buffer_permanent_local_flags |= 0x4000; | |
54ad07d3 | 3939 | #endif |
2e716096 RS |
3940 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
3941 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); | |
3b06f880 KH |
3942 | XSETFASTINT (buffer_local_flags.category_table, 0x20000); |
3943 | XSETFASTINT (buffer_local_flags.direction_reversed, 0x40000); | |
1bf08baf | 3944 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, 0x80000); |
a1a17b61 KH |
3945 | /* Make this one a permanent local. */ |
3946 | buffer_permanent_local_flags |= 0x80000; | |
0552666b GM |
3947 | XSETFASTINT (buffer_local_flags.left_margin_width, 0x100000); |
3948 | XSETFASTINT (buffer_local_flags.right_margin_width, 0x200000); | |
3949 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, 0x400000); | |
3950 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, 0x800000); | |
3951 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, 0x1000000); | |
045dee35 | 3952 | XSETFASTINT (buffer_local_flags.header_line_format, 0x2000000); |
c71b5d9b | 3953 | |
1ab256cb RM |
3954 | Vbuffer_alist = Qnil; |
3955 | current_buffer = 0; | |
3956 | all_buffers = 0; | |
3957 | ||
3958 | QSFundamental = build_string ("Fundamental"); | |
3959 | ||
3960 | Qfundamental_mode = intern ("fundamental-mode"); | |
3961 | buffer_defaults.major_mode = Qfundamental_mode; | |
3962 | ||
3963 | Qmode_class = intern ("mode-class"); | |
3964 | ||
3965 | Qprotected_field = intern ("protected-field"); | |
3966 | ||
3967 | Qpermanent_local = intern ("permanent-local"); | |
3968 | ||
3969 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
3970 | ||
3971 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 3972 | |
1ab256cb RM |
3973 | /* super-magic invisible buffer */ |
3974 | Vbuffer_alist = Qnil; | |
3975 | ||
ffd56f97 | 3976 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
3977 | |
3978 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
3979 | } |
3980 | ||
dfcf069d | 3981 | void |
1ab256cb RM |
3982 | init_buffer () |
3983 | { | |
3984 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
3985 | char *pwd; |
3986 | struct stat dotstat, pwdstat; | |
136351b7 | 3987 | Lisp_Object temp; |
f7975d07 | 3988 | int rc; |
1ab256cb RM |
3989 | |
3990 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
3d871c85 RS |
3991 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
3992 | Fset_buffer_multibyte (Qnil); | |
2381d133 JB |
3993 | |
3994 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
3995 | when PWD is right, and may avoid a fatal error. */ | |
309f2a6e RS |
3996 | if ((pwd = getenv ("PWD")) != 0 |
3997 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
3998 | && stat (pwd, &pwdstat) == 0 |
3999 | && stat (".", &dotstat) == 0 | |
4000 | && dotstat.st_ino == pwdstat.st_ino | |
4001 | && dotstat.st_dev == pwdstat.st_dev | |
4002 | && strlen (pwd) < MAXPATHLEN) | |
4003 | strcpy (buf, pwd); | |
6335beb0 RS |
4004 | #ifdef HAVE_GETCWD |
4005 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 4006 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 4007 | #else |
2381d133 | 4008 | else if (getwd (buf) == 0) |
cf1e6391 | 4009 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 4010 | #endif |
1ab256cb RM |
4011 | |
4012 | #ifndef VMS | |
4013 | /* Maybe this should really use some standard subroutine | |
4014 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
4015 | rc = strlen (buf); |
4016 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
4017 | { | |
4018 | buf[rc] = DIRECTORY_SEP; | |
4019 | buf[rc + 1] = '\0'; | |
4020 | } | |
1ab256cb | 4021 | #endif /* not VMS */ |
0995fa35 | 4022 | |
1ab256cb | 4023 | current_buffer->directory = build_string (buf); |
136351b7 | 4024 | |
0995fa35 RS |
4025 | /* Add /: to the front of the name |
4026 | if it would otherwise be treated as magic. */ | |
4027 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
4028 | if (! NILP (temp) |
4029 | /* If the default dir is just /, TEMP is non-nil | |
4030 | because of the ange-ftp completion handler. | |
4031 | However, it is not necessary to turn / into /:/. | |
4032 | So avoid doing that. */ | |
4033 | && strcmp ("/", XSTRING (current_buffer->directory)->data)) | |
0995fa35 RS |
4034 | current_buffer->directory |
4035 | = concat2 (build_string ("/:"), current_buffer->directory); | |
4036 | ||
136351b7 RS |
4037 | temp = get_minibuffer (0); |
4038 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
4039 | } |
4040 | ||
4041 | /* initialize the buffer routines */ | |
dfcf069d | 4042 | void |
1ab256cb RM |
4043 | syms_of_buffer () |
4044 | { | |
188d4d11 RM |
4045 | extern Lisp_Object Qdisabled; |
4046 | ||
9115729e KH |
4047 | staticpro (&last_overlay_modification_hooks); |
4048 | last_overlay_modification_hooks | |
4049 | = Fmake_vector (make_number (10), Qnil); | |
4050 | ||
1ab256cb RM |
4051 | staticpro (&Vbuffer_defaults); |
4052 | staticpro (&Vbuffer_local_symbols); | |
4053 | staticpro (&Qfundamental_mode); | |
4054 | staticpro (&Qmode_class); | |
4055 | staticpro (&QSFundamental); | |
4056 | staticpro (&Vbuffer_alist); | |
4057 | staticpro (&Qprotected_field); | |
4058 | staticpro (&Qpermanent_local); | |
4059 | staticpro (&Qkill_buffer_hook); | |
22378665 | 4060 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 4061 | staticpro (&Qoverlayp); |
9d7608b7 KH |
4062 | Qevaporate = intern ("evaporate"); |
4063 | staticpro (&Qevaporate); | |
294d215f | 4064 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 4065 | staticpro (&Qmodification_hooks); |
294d215f | 4066 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 4067 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 4068 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 4069 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 4070 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 4071 | staticpro (&Qget_file_buffer); |
5985d248 KH |
4072 | Qpriority = intern ("priority"); |
4073 | staticpro (&Qpriority); | |
4074 | Qwindow = intern ("window"); | |
4075 | staticpro (&Qwindow); | |
bbbe9545 KH |
4076 | Qbefore_string = intern ("before-string"); |
4077 | staticpro (&Qbefore_string); | |
4078 | Qafter_string = intern ("after-string"); | |
4079 | staticpro (&Qafter_string); | |
22378665 RS |
4080 | Qfirst_change_hook = intern ("first-change-hook"); |
4081 | staticpro (&Qfirst_change_hook); | |
4082 | Qbefore_change_functions = intern ("before-change-functions"); | |
4083 | staticpro (&Qbefore_change_functions); | |
4084 | Qafter_change_functions = intern ("after-change-functions"); | |
4085 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
4086 | |
4087 | Fput (Qprotected_field, Qerror_conditions, | |
4088 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
4089 | Fput (Qprotected_field, Qerror_message, | |
4090 | build_string ("Attempt to modify a protected field")); | |
4091 | ||
4092 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
4093 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
4094 | ||
4095 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
4096 | &buffer_defaults.mode_line_format, | |
4097 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
4098 | This is the same as (default-value 'mode-line-format)."); | |
4099 | ||
045dee35 GM |
4100 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
4101 | &buffer_defaults.header_line_format, | |
4102 | "Default value of `header-line-format' for buffers that don't override it.\n\ | |
4103 | This is the same as (default-value 'header-line-format)."); | |
0552666b | 4104 | |
1ab256cb RM |
4105 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
4106 | &buffer_defaults.abbrev_mode, | |
4107 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
4108 | This is the same as (default-value 'abbrev-mode)."); | |
4109 | ||
4110 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
4111 | &buffer_defaults.ctl_arrow, | |
4112 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
4113 | This is the same as (default-value 'ctl-arrow)."); | |
4114 | ||
3b06f880 KH |
4115 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
4116 | &buffer_defaults.direction_reversed, | |
4117 | "Default value of `direction_reversed' for buffers that do not override it.\n\ | |
4118 | This is the same as (default-value 'direction-reversed)."); | |
4119 | ||
a1a17b61 KH |
4120 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
4121 | &buffer_defaults.enable_multibyte_characters, | |
ed8300d9 | 4122 | "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ |
53fe786d | 4123 | This is the same as (default-value 'enable-multibyte-characters)."); |
a1a17b61 | 4124 | |
c71b5d9b KH |
4125 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
4126 | &buffer_defaults.buffer_file_coding_system, | |
4127 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ | |
53fe786d | 4128 | This is the same as (default-value 'buffer-file-coding-system)."); |
c71b5d9b | 4129 | |
1ab256cb RM |
4130 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
4131 | &buffer_defaults.truncate_lines, | |
4132 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
4133 | This is the same as (default-value 'truncate-lines)."); | |
4134 | ||
4135 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
4136 | &buffer_defaults.fill_column, | |
4137 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
4138 | This is the same as (default-value 'fill-column)."); | |
4139 | ||
4140 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
4141 | &buffer_defaults.left_margin, | |
4142 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
4143 | This is the same as (default-value 'left-margin)."); | |
4144 | ||
4145 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
4146 | &buffer_defaults.tab_width, | |
4147 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
4148 | This is the same as (default-value 'tab-width)."); | |
4149 | ||
4150 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
4151 | &buffer_defaults.case_fold_search, | |
4152 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
4153 | This is the same as (default-value 'case-fold-search)."); | |
4154 | ||
f7975d07 | 4155 | #ifdef DOS_NT |
54ad07d3 RS |
4156 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
4157 | &buffer_defaults.buffer_file_type, | |
4158 | "Default file type for buffers that do not override it.\n\ | |
4159 | This is the same as (default-value 'buffer-file-type).\n\ | |
4160 | The file type is nil for text, t for binary."); | |
4161 | #endif | |
4162 | ||
0552666b GM |
4163 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
4164 | &buffer_defaults.left_margin_width, | |
4165 | "Default value of `left-margin-width' for buffers that don't override it.\n\ | |
4166 | This is the same as (default-value 'left-margin-width)."); | |
4167 | ||
4168 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
4169 | &buffer_defaults.right_margin_width, | |
4170 | "Default value of `right_margin_width' for buffers that don't override it.\n\ | |
4171 | This is the same as (default-value 'right-margin-width)."); | |
4172 | ||
4173 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
4174 | &buffer_defaults.indicate_empty_lines, | |
4175 | "Default value of `indicate-empty-lines' for buffers that don't override it.\n\ | |
4176 | This is the same as (default-value 'indicate-empty-lines)."); | |
4177 | ||
4178 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
4179 | &buffer_defaults.scroll_up_aggressively, | |
4180 | "Default value of `scroll-up-aggressively' for buffers that\n\ | |
4181 | don't override it. This is the same as (default-value\n\ | |
4182 | 'scroll-up-aggressively)."); | |
4183 | ||
4184 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
4185 | &buffer_defaults.scroll_down_aggressively, | |
4186 | "Default value of `scroll-down-aggressively' for buffers that\n\ | |
4187 | don't override it. This is the same as (default-value\n\ | |
4188 | 'scroll-down-aggressively)."); | |
4189 | ||
045dee35 GM |
4190 | DEFVAR_PER_BUFFER ("header-line-format", |
4191 | ¤t_buffer->header_line_format, | |
0552666b GM |
4192 | Qnil, |
4193 | "Analogous to `mode-line-format', but for a mode line displayed\n\ | |
4194 | at the top of windows."); | |
4195 | ||
0fa3ba92 JB |
4196 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
4197 | Qnil, 0); | |
1ab256cb RM |
4198 | |
4199 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
4200 | But make-docfile finds it! | |
4201 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 4202 | Qnil, |
1ab256cb RM |
4203 | "Template for displaying mode line for current buffer.\n\ |
4204 | Each buffer has its own value of this variable.\n\ | |
0552666b GM |
4205 | Value may be nil, a string, a symbol or a list or cons cell.\n\ |
4206 | A value of nil means don't display a mode line.\n\ | |
1ab256cb RM |
4207 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
4208 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
4209 | in that the %-constructs below are not recognized.\n\ | |
4210 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
4211 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
4212 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
4213 | For a list whose car is a string or list, each element is processed\n\ | |
4214 | recursively and the results are effectively concatenated.\n\ | |
4215 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
4216 | and padded (if the number is positive) or truncated (if negative)\n\ | |
4217 | to the width specified by that number.\n\ | |
4218 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
4219 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
4220 | or when it is found in a cons-cell or a list)\n\ | |
4221 | %b -- print buffer name. %f -- print visited file name.\n\ | |
5d516f2d | 4222 | %F -- print frame name.\n\ |
c2ff34f7 RS |
4223 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
4224 | % means buffer is read-only and * means it is modified.\n\ | |
4225 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 4226 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 4227 | %c -- print the current column number (this makes editing slower).\n\ |
6a567ad8 RS |
4228 | To make the column number update correctly in all cases,\n\ |
4229 | `column-number-mode' must be non-nil.\n\ | |
dd24e6a6 | 4230 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 4231 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 4232 | or print Bottom or All.\n\ |
1ab256cb | 4233 | %n -- print Narrow if appropriate.\n\ |
b77087c5 | 4234 | %t -- print T if file is text, B if binary.\n\ |
1ab256cb RM |
4235 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
4236 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
4237 | Decimal digits after the % specify field width to which to pad."); | |
4238 | */ | |
4239 | ||
4240 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
4241 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
4242 | nil here means use current buffer's major mode."); | |
4243 | ||
4244 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 4245 | make_number (Lisp_Symbol), |
1ab256cb RM |
4246 | "Symbol for current buffer's major mode."); |
4247 | ||
4248 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 4249 | make_number (Lisp_String), |
1ab256cb RM |
4250 | "Pretty name of current buffer's major mode (a string)."); |
4251 | ||
0fa3ba92 | 4252 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
4253 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
4254 | Automatically becomes buffer-local when set in any fashion."); | |
4255 | ||
4256 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 4257 | Qnil, |
5ed62574 | 4258 | "*Non-nil if searches and matches should ignore case.\n\ |
1ab256cb RM |
4259 | Automatically becomes buffer-local when set in any fashion."); |
4260 | ||
4261 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 4262 | make_number (Lisp_Int), |
1ab256cb RM |
4263 | "*Column beyond which automatic line-wrapping should happen.\n\ |
4264 | Automatically becomes buffer-local when set in any fashion."); | |
4265 | ||
4266 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 4267 | make_number (Lisp_Int), |
1ab256cb RM |
4268 | "*Column for the default indent-line-function to indent to.\n\ |
4269 | Linefeed indents to this column in Fundamental mode.\n\ | |
4270 | Automatically becomes buffer-local when set in any fashion."); | |
4271 | ||
4272 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 4273 | make_number (Lisp_Int), |
1ab256cb RM |
4274 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
4275 | Automatically becomes buffer-local when set in any fashion."); | |
4276 | ||
0fa3ba92 | 4277 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb | 4278 | "*Non-nil means display control chars with uparrow.\n\ |
6a99d31d | 4279 | A value of nil means use backslash and octal digits.\n\ |
1ab256cb RM |
4280 | Automatically becomes buffer-local when set in any fashion.\n\ |
4281 | This variable does not apply to characters whose display is specified\n\ | |
4282 | in the current display table (if there is one)."); | |
4283 | ||
3b06f880 | 4284 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf KH |
4285 | ¤t_buffer->enable_multibyte_characters, |
4286 | make_number (-1), | |
36bb26f7 | 4287 | "Non-nil means the buffer contents are regarded as multi-byte characters.\n\ |
ed218f73 | 4288 | Otherwise they are regarded as unibyte. This affects the display,\n\ |
53fe786d RS |
4289 | file I/O and the behavior of various editing commands.\n\ |
4290 | \n\ | |
4291 | This variable is buffer-local but you cannot set it directly;\n\ | |
4292 | use the function `set-buffer-multibyte' to change a buffer's representation.\n\ | |
4293 | Changing its default value with `setq-default' is supported.\n\ | |
4294 | See also variable `default-enable-multibyte-characters' and Info node\n\ | |
4295 | `(elisp)Text Representations'."); | |
3b06f880 | 4296 | |
c71b5d9b KH |
4297 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4298 | ¤t_buffer->buffer_file_coding_system, Qnil, | |
4299 | "Coding system to be used for encoding the buffer contents on saving.\n\ | |
940daec1 RS |
4300 | This variable applies to saving the buffer, and also to `write-region'\n\ |
4301 | and other functions that use `write-region'.\n\ | |
4302 | It does not apply to sending output to subprocesses, however.\n\ | |
4303 | \n\ | |
4304 | If this is nil, the buffer is saved without any code conversion\n\ | |
4305 | unless some coding system is specified in `file-coding-system-alist'\n\ | |
c71b5d9b KH |
4306 | for the buffer file.\n\ |
4307 | \n\ | |
940daec1 RS |
4308 | The variable `coding-system-for-write', if non-nil, overrides this variable.\n\ |
4309 | \n\ | |
c71b5d9b KH |
4310 | This variable is never applied to a way of decoding\n\ |
4311 | a file while reading it."); | |
4312 | ||
3b06f880 KH |
4313 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
4314 | Qnil, | |
4315 | "*Non-nil means lines in the buffer are displayed right to left."); | |
4316 | ||
0fa3ba92 | 4317 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
4318 | "*Non-nil means do not display continuation lines;\n\ |
4319 | give each line of text one screen line.\n\ | |
4320 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4321 | \n\ | |
4322 | Note that this is overridden by the variable\n\ | |
4323 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 4324 | and this buffer is not full-frame width."); |
1ab256cb | 4325 | |
f7975d07 | 4326 | #ifdef DOS_NT |
54ad07d3 RS |
4327 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
4328 | Qnil, | |
006d3d34 RS |
4329 | "Non-nil if the visited file is a binary file.\n\ |
4330 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
4331 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 4332 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
4333 | #endif |
4334 | ||
1ab256cb | 4335 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 4336 | make_number (Lisp_String), |
1ab256cb RM |
4337 | "Name of default directory of current buffer. Should end with slash.\n\ |
4338 | Each buffer has its own value of this variable."); | |
4339 | ||
4340 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 4341 | Qnil, |
1ab256cb | 4342 | "Function called (if non-nil) to perform auto-fill.\n\ |
54158e68 | 4343 | It is called after self-inserting a space or newline.\n\ |
1ab256cb | 4344 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
4345 | NOTE: This variable is not a hook;\n\ |
4346 | its value may not be a list of functions."); | |
1ab256cb RM |
4347 | |
4348 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 4349 | make_number (Lisp_String), |
1ab256cb RM |
4350 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
4351 | Each buffer has its own value of this variable."); | |
4352 | ||
f6ed2e84 RS |
4353 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
4354 | make_number (Lisp_String), | |
bb4c204e | 4355 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
4356 | The truename of a file is calculated by `file-truename'\n\ |
4357 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
4358 | Each buffer has its own value of this variable."); |
4359 | ||
1ab256cb | 4360 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 4361 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 4362 | make_number (Lisp_String), |
1ab256cb RM |
4363 | "Name of file for auto-saving current buffer,\n\ |
4364 | or nil if buffer should not be auto-saved.\n\ | |
4365 | Each buffer has its own value of this variable."); | |
4366 | ||
0fa3ba92 | 4367 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
4368 | "Non-nil if this buffer is read-only.\n\ |
4369 | Each buffer has its own value of this variable."); | |
4370 | ||
0fa3ba92 | 4371 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
4372 | "Non-nil if this buffer's file has been backed up.\n\ |
4373 | Backing up is done before the first time the file is saved.\n\ | |
4374 | Each buffer has its own value of this variable."); | |
4375 | ||
4376 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 4377 | make_number (Lisp_Int), |
1ab256cb RM |
4378 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
4379 | 0 initially.\n\ | |
4380 | Each buffer has its own value of this variable."); | |
4381 | ||
4382 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 4383 | Qnil, |
1ab256cb RM |
4384 | "Non-nil enables selective display:\n\ |
4385 | Integer N as value means display only lines\n\ | |
4386 | that start with less than n columns of space.\n\ | |
4387 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
4388 | Then ^M's in the file are written into files as newlines.\n\n\ | |
4389 | Automatically becomes buffer-local when set in any fashion."); | |
4390 | ||
4391 | #ifndef old | |
4392 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4393 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 4394 | Qnil, |
1ab256cb RM |
4395 | "t means display ... on previous line when a line is invisible.\n\ |
4396 | Automatically becomes buffer-local when set in any fashion."); | |
4397 | #endif | |
4398 | ||
0fa3ba92 | 4399 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 4400 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
4401 | The value should be one of `overwrite-mode-textual',\n\ |
4402 | `overwrite-mode-binary', or nil.\n\ | |
4403 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 4404 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 4405 | until the tab is filled in.\n\ |
6bbb0d4a | 4406 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
4407 | Automatically becomes buffer-local when set in any fashion."); |
4408 | ||
54939090 RS |
4409 | #if 0 /* The doc string is too long for some compilers, |
4410 | but make-docfile can find it in this comment. */ | |
1ab256cb | 4411 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 4412 | Qnil, |
1ab256cb RM |
4413 | "Display table that controls display of the contents of current buffer.\n\ |
4414 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
4415 | The display table is a char-table created with `make-display-table'.\n\ |
4416 | The ordinary char-table elements control how to display each possible text\n\ | |
4417 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 4418 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
4419 | There are six extra slots to control the display of\n\ |
4420 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
4421 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 4422 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
4423 | (extra-slot 2, a single character);\n\ |
4424 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 4425 | a single character);\n\ |
6fdc249f | 4426 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
4427 | a vector of characters);\n\ |
4428 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
4429 | (extra-slot 5, a single character).\n\ |
4430 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
4431 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
4432 | Each window can have its own, overriding display table."); | |
54939090 RS |
4433 | #endif |
4434 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 4435 | Qnil, 0); |
1ab256cb | 4436 | |
0552666b GM |
4437 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
4438 | Qnil, | |
4439 | "*Width of left marginal area for display of a buffer.\n\ | |
4440 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4441 | A value of nil means no marginal area."); | |
4442 | ||
4443 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
4444 | Qnil, | |
4445 | "*Width of right marginal area for display of a buffer.\n\ | |
4446 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4447 | A value of nil means no marginal area."); | |
4448 | ||
4449 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
4450 | ¤t_buffer->indicate_empty_lines, Qnil, | |
4451 | "*Non-nil means visually indicate lines not displaying text.\n\ | |
4452 | Automatically becomes buffer-local when set in any fashion.\n"); | |
4453 | ||
4454 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
4455 | ¤t_buffer->scroll_up_aggressively, Qnil, | |
4456 | "*If a number, scroll display up aggressively.\n\ | |
4457 | If scrolling a window because point is above the window start, choose\n\ | |
4458 | a new window start so that point ends up that fraction of the window's\n\ | |
4459 | height from the bottom of the window.\n\ | |
4460 | Automatically becomes buffer-local when set in any fashion."); | |
4461 | ||
4462 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
4463 | ¤t_buffer->scroll_down_aggressively, Qnil, | |
4464 | "*If a number, scroll display down aggressively.\n\ | |
4465 | If scrolling a window because point is below the window end, choose\n\ | |
4466 | a new window start so that point ends up that fraction of the window's\n\ | |
4467 | height from the top of the window.\n\ | |
4468 | Automatically becomes buffer-local when set in any fashion."); | |
4469 | ||
1ab256cb RM |
4470 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
4471 | "Don't ask."); | |
4472 | */ | |
01050cb5 | 4473 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
f0724bcb | 4474 | "If non-nil, a function to call before each text change (obsolete).\n\ |
1ab256cb RM |
4475 | Two arguments are passed to the function: the positions of\n\ |
4476 | the beginning and end of the range of old text to be changed.\n\ | |
4477 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4478 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 4479 | \n\ |
5f079267 | 4480 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
4481 | don't call any before-change or after-change functions.\n\ |
4482 | That's because these variables are temporarily set to nil.\n\ | |
4483 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4484 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4485 | accomplishing an equivalent result by using other variables.\n\n\ |
4486 | This variable is obsolete; use `before-change-functions' instead."); | |
1ab256cb RM |
4487 | Vbefore_change_function = Qnil; |
4488 | ||
4489 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
f0724bcb | 4490 | "If non-nil, a Function to call after each text change (obsolete).\n\ |
1ab256cb RM |
4491 | Three arguments are passed to the function: the positions of\n\ |
4492 | the beginning and end of the range of changed text,\n\ | |
4493 | and the length of the pre-change text replaced by that range.\n\ | |
4494 | \(For an insertion, the pre-change length is zero;\n\ | |
839dd834 | 4495 | for a deletion, that length is the number of bytes deleted,\n\ |
1ab256cb RM |
4496 | and the post-change beginning and end are at the same place.)\n\ |
4497 | \n\ | |
5f079267 | 4498 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
4499 | don't call any before-change or after-change functions.\n\ |
4500 | That's because these variables are temporarily set to nil.\n\ | |
4501 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4502 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4503 | accomplishing an equivalent result by using other variables.\n\n\ |
4504 | This variable is obsolete; use `after-change-functions' instead."); | |
1ab256cb RM |
4505 | Vafter_change_function = Qnil; |
4506 | ||
5f079267 RS |
4507 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
4508 | "List of functions to call before each text change.\n\ | |
4509 | Two arguments are passed to each function: the positions of\n\ | |
4510 | the beginning and end of the range of old text to be changed.\n\ | |
4511 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4512 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
4513 | \n\ |
4514 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
4515 | don't call any before-change or after-change functions.\n\ |
4516 | That's because these variables are temporarily set to nil.\n\ | |
4517 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4518 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
4519 | accomplishing an equivalent result by using other variables.\n\ |
4520 | \n\ | |
4521 | If an unhandled error happens in running these functions,\n\ | |
4522 | the variable's value remains nil. That prevents the error\n\ | |
4523 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
4524 | Vbefore_change_functions = Qnil; |
4525 | ||
4526 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
4527 | "List of function to call after each text change.\n\ | |
4528 | Three arguments are passed to each function: the positions of\n\ | |
4529 | the beginning and end of the range of changed text,\n\ | |
839dd834 | 4530 | and the length in bytes of the pre-change text replaced by that range.\n\ |
5f079267 | 4531 | \(For an insertion, the pre-change length is zero;\n\ |
839dd834 | 4532 | for a deletion, that length is the number of bytes deleted,\n\ |
5f079267 RS |
4533 | and the post-change beginning and end are at the same place.)\n\ |
4534 | \n\ | |
4535 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
4536 | don't call any before-change or after-change functions.\n\ |
4537 | That's because these variables are temporarily set to nil.\n\ | |
4538 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4539 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
4540 | accomplishing an equivalent result by using other variables.\n\ |
4541 | \n\ | |
4542 | If an unhandled error happens in running these functions,\n\ | |
4543 | the variable's value remains nil. That prevents the error\n\ | |
4544 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
4545 | Vafter_change_functions = Qnil; |
4546 | ||
dbc4e1c1 JB |
4547 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
4548 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
4549 | The functions are run using the `run-hooks' function."); | |
4550 | Vfirst_change_hook = Qnil; | |
1ab256cb | 4551 | |
54939090 RS |
4552 | #if 0 /* The doc string is too long for some compilers, |
4553 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 4554 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb | 4555 | "List of undo entries in current buffer.\n\ |
3fd364db | 4556 | This variable is always local in all buffers.\n\ |
1ab256cb RM |
4557 | Recent changes come first; older changes follow newer.\n\ |
4558 | \n\ | |
630f4018 KH |
4559 | An entry (BEG . END) represents an insertion which begins at\n\ |
4560 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
4561 | \n\ |
4562 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
4563 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
4564 | of the text being deleted; if negative, point was at the end.\n\ | |
4565 | \n\ | |
6c0df54a RS |
4566 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
4567 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
4568 | of the visited file's modification time, as of that time. If the\n\ | |
4569 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
4570 | obsolete.\n\ |
4571 | \n\ | |
6c0df54a RS |
4572 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
4573 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
4574 | and VALUE is the old value.\n\ | |
483c1fd3 | 4575 | \n\ |
da1c183c RS |
4576 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
4577 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
4578 | \n\ | |
bec44fd6 JB |
4579 | An entry of the form POSITION indicates that point was at the buffer\n\ |
4580 | location given by the integer. Undoing an entry of this form places\n\ | |
4581 | point at POSITION.\n\ | |
4582 | \n\ | |
1ab256cb RM |
4583 | nil marks undo boundaries. The undo command treats the changes\n\ |
4584 | between two undo boundaries as a single step to be undone.\n\ | |
4585 | \n\ | |
bec44fd6 | 4586 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
4587 | #endif |
4588 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 4589 | 0); |
1ab256cb | 4590 | |
c48f61ef RS |
4591 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
4592 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
4593 | Automatically local in all buffers."); | |
4594 | ||
28e969dd | 4595 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
4596 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
4597 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 4598 | \n\ |
f0c5b712 JB |
4599 | Normally, the line-motion functions work by scanning the buffer for\n\ |
4600 | newlines. Columnar operations (like move-to-column and\n\ | |
4601 | compute-motion) also work by scanning the buffer, summing character\n\ | |
4602 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 4603 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
4604 | motion functions will take longer to execute. Emacs may also take\n\ |
4605 | longer to update the display.\n\ | |
28e969dd | 4606 | \n\ |
f0c5b712 JB |
4607 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
4608 | results of their scans, and consult the cache to avoid rescanning\n\ | |
4609 | regions of the buffer until the text is modified. The caches are most\n\ | |
4610 | beneficial when they prevent the most searching---that is, when the\n\ | |
4611 | buffer contains long lines and large regions of characters with the\n\ | |
4612 | same, fixed screen width.\n\ | |
28e969dd | 4613 | \n\ |
f0c5b712 JB |
4614 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
4615 | become slightly slower (because of the overhead of consulting the\n\ | |
4616 | cache), and the caches will use memory roughly proportional to the\n\ | |
4617 | number of newlines and characters whose screen width varies.\n\ | |
4618 | \n\ | |
4619 | The caches require no explicit maintenance; their accuracy is\n\ | |
4620 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
4621 | the cache should not affect the behavior of any of the motion\n\ | |
4622 | functions; it should only affect their performance."); | |
28e969dd | 4623 | |
943e065b | 4624 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3fd364db RS |
4625 | "Value of point before the last series of scroll operations, or nil.\n\ |
4626 | This variable is always local in all buffers."); | |
943e065b | 4627 | |
be9aafdd BG |
4628 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
4629 | "List of formats to use when saving this buffer.\n\ | |
3fd364db | 4630 | This variable is always local in all buffers.\n\ |
be9aafdd BG |
4631 | Formats are defined by `format-alist'. This variable is\n\ |
4632 | set when a file is visited. Automatically local in all buffers."); | |
4633 | ||
3cb719bd RS |
4634 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4635 | ¤t_buffer->invisibility_spec, Qnil, | |
4636 | "Invisibility spec of this buffer.\n\ | |
3fd364db | 4637 | This variable is always local in all buffers.\n\ |
3cb719bd RS |
4638 | The default is t, which means that text is invisible\n\ |
4639 | if it has a non-nil `invisible' property.\n\ | |
4640 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
4641 | property is an element in that list.\n\ | |
554216ad KH |
4642 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
4643 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
4644 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
4645 | ||
7962a441 RS |
4646 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4647 | ¤t_buffer->display_count, Qnil, | |
3fd364db RS |
4648 | "A number incremented each time this buffer is displayed in a window.\n\ |
4649 | This variable is always local in all buffers.\n\ | |
4650 | The function `set-window-buffer increments it."); | |
4651 | ||
4652 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4653 | ¤t_buffer->display_time, Qnil, | |
4654 | "Time stamp updated each time this buffer is displayed in a window.\n\ | |
4655 | This variable is always local in all buffers.\n\ | |
4656 | The function `set-window-buffer' updates this variable\n\ | |
4657 | to the value obtained by calling `current-time'.\n\ | |
4658 | If the buffer has never been shown in a window, the value is nil."); | |
7962a441 | 4659 | |
c48f61ef | 4660 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
319c537c RS |
4661 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
4662 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ | |
4663 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ | |
4664 | all windows or just the selected window."); | |
c48f61ef RS |
4665 | Vtransient_mark_mode = Qnil; |
4666 | ||
0a4469c9 | 4667 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
4668 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
4669 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
4670 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
4671 | and disregard a `read-only' text property if the property value\n\ | |
4672 | is a member of the list."); | |
4673 | Vinhibit_read_only = Qnil; | |
4674 | ||
dcdffbf6 RS |
4675 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
4676 | "List of functions called with no args to query before killing a buffer."); | |
4677 | Vkill_buffer_query_functions = Qnil; | |
4678 | ||
0dc88e60 | 4679 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
4680 | defsubr (&Sbuffer_list); |
4681 | defsubr (&Sget_buffer); | |
4682 | defsubr (&Sget_file_buffer); | |
4683 | defsubr (&Sget_buffer_create); | |
336cd056 | 4684 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 4685 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
4686 | defsubr (&Sbuffer_name); |
4687 | /*defsubr (&Sbuffer_number);*/ | |
4688 | defsubr (&Sbuffer_file_name); | |
336cd056 | 4689 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
4690 | defsubr (&Sbuffer_local_variables); |
4691 | defsubr (&Sbuffer_modified_p); | |
4692 | defsubr (&Sset_buffer_modified_p); | |
4693 | defsubr (&Sbuffer_modified_tick); | |
4694 | defsubr (&Srename_buffer); | |
4695 | defsubr (&Sother_buffer); | |
4696 | defsubr (&Sbuffer_disable_undo); | |
4697 | defsubr (&Sbuffer_enable_undo); | |
4698 | defsubr (&Skill_buffer); | |
a9ee7a59 | 4699 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
4700 | defsubr (&Sswitch_to_buffer); |
4701 | defsubr (&Spop_to_buffer); | |
4702 | defsubr (&Scurrent_buffer); | |
4703 | defsubr (&Sset_buffer); | |
4704 | defsubr (&Sbarf_if_buffer_read_only); | |
4705 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
4706 | defsubr (&Serase_buffer); |
4707 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 4708 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 4709 | |
52f8ec73 | 4710 | defsubr (&Soverlayp); |
2eec3b4e RS |
4711 | defsubr (&Smake_overlay); |
4712 | defsubr (&Sdelete_overlay); | |
4713 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
4714 | defsubr (&Soverlay_start); |
4715 | defsubr (&Soverlay_end); | |
4716 | defsubr (&Soverlay_buffer); | |
4717 | defsubr (&Soverlay_properties); | |
2eec3b4e | 4718 | defsubr (&Soverlays_at); |
74514898 | 4719 | defsubr (&Soverlays_in); |
2eec3b4e | 4720 | defsubr (&Snext_overlay_change); |
239c932b | 4721 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
4722 | defsubr (&Soverlay_recenter); |
4723 | defsubr (&Soverlay_lists); | |
4724 | defsubr (&Soverlay_get); | |
4725 | defsubr (&Soverlay_put); | |
1ab256cb RM |
4726 | } |
4727 | ||
dfcf069d | 4728 | void |
1ab256cb RM |
4729 | keys_of_buffer () |
4730 | { | |
4731 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
4732 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
4733 | |
4734 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
4735 | initialized when that function gets called. */ | |
4736 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 4737 | } |