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; | |
3b06f880 | 367 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 368 | |
28e969dd JB |
369 | b->newline_cache = 0; |
370 | b->width_run_cache = 0; | |
371 | b->width_table = Qnil; | |
0552666b GM |
372 | #if !NO_PROMPT_IN_BUFFER |
373 | b->minibuffer_prompt_length = Qnil; | |
374 | #endif | |
28e969dd | 375 | |
1ab256cb RM |
376 | /* Put this on the chain of all buffers including killed ones. */ |
377 | b->next = all_buffers; | |
378 | all_buffers = b; | |
379 | ||
336cd056 RS |
380 | /* An ordinary buffer normally doesn't need markers |
381 | to handle BEGV and ZV. */ | |
382 | b->pt_marker = Qnil; | |
383 | b->begv_marker = Qnil; | |
384 | b->zv_marker = Qnil; | |
04ae1b48 RS |
385 | |
386 | name = Fcopy_sequence (name); | |
387 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 388 | b->name = name; |
04ae1b48 | 389 | |
1ab256cb RM |
390 | if (XSTRING (name)->data[0] != ' ') |
391 | b->undo_list = Qnil; | |
392 | else | |
393 | b->undo_list = Qt; | |
394 | ||
395 | reset_buffer (b); | |
13de9290 | 396 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
397 | |
398 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 399 | XSETBUFFER (buf, b); |
1ab256cb RM |
400 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
401 | ||
402 | b->mark = Fmake_marker (); | |
336cd056 RS |
403 | BUF_MARKERS (b) = Qnil; |
404 | b->name = name; | |
405 | return buf; | |
406 | } | |
407 | ||
a2428fa2 | 408 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
193c3837 | 409 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
410 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
411 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
9e552710 RS |
412 | NAME should be a string which is not the name of an existing buffer.") |
413 | (base_buffer, name) | |
414 | register Lisp_Object base_buffer, name; | |
336cd056 RS |
415 | { |
416 | register Lisp_Object buf; | |
417 | register struct buffer *b; | |
418 | ||
419 | buf = Fget_buffer (name); | |
420 | if (!NILP (buf)) | |
421 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
422 | ||
423 | base_buffer = Fget_buffer (base_buffer); | |
424 | if (NILP (base_buffer)) | |
425 | error ("No such buffer: `%s'", | |
426 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
427 | ||
428 | if (XSTRING (name)->size == 0) | |
429 | error ("Empty string for buffer name is not allowed"); | |
430 | ||
431 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
432 | ||
433 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
434 | ||
435 | if (XBUFFER (base_buffer)->base_buffer) | |
436 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
437 | else | |
438 | b->base_buffer = XBUFFER (base_buffer); | |
439 | ||
440 | /* Use the base buffer's text object. */ | |
441 | b->text = b->base_buffer->text; | |
442 | ||
443 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
444 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
445 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
446 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
447 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
448 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
449 | |
450 | b->newline_cache = 0; | |
451 | b->width_run_cache = 0; | |
452 | b->width_table = Qnil; | |
0552666b GM |
453 | #if !NO_PROMPT_IN_BUFFER |
454 | b->minibuffer_prompt_length = Qnil; | |
455 | #endif | |
336cd056 RS |
456 | |
457 | /* Put this on the chain of all buffers including killed ones. */ | |
458 | b->next = all_buffers; | |
459 | all_buffers = b; | |
460 | ||
461 | name = Fcopy_sequence (name); | |
462 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
463 | b->name = name; | |
464 | ||
465 | reset_buffer (b); | |
13de9290 | 466 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
467 | |
468 | /* Put this in the alist of all live buffers. */ | |
469 | XSETBUFFER (buf, b); | |
470 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
471 | ||
472 | b->mark = Fmake_marker (); | |
1ab256cb | 473 | b->name = name; |
336cd056 | 474 | |
abc9d959 RS |
475 | /* The multibyte status belongs to the base buffer. */ |
476 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
477 | ||
336cd056 RS |
478 | /* Make sure the base buffer has markers for its narrowing. */ |
479 | if (NILP (b->base_buffer->pt_marker)) | |
480 | { | |
481 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
482 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
483 | BUF_PT (b->base_buffer), | |
484 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
485 | } |
486 | if (NILP (b->base_buffer->begv_marker)) | |
487 | { | |
488 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
489 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
490 | BUF_BEGV (b->base_buffer), | |
491 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
492 | } |
493 | if (NILP (b->base_buffer->zv_marker)) | |
494 | { | |
495 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
496 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
497 | BUF_ZV (b->base_buffer), | |
498 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 499 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
500 | } |
501 | ||
502 | /* Give the indirect buffer markers for its narrowing. */ | |
ea064aa0 | 503 | b->pt_marker = Fmake_marker (); |
3f236a40 | 504 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); |
ea064aa0 | 505 | b->begv_marker = Fmake_marker (); |
3f236a40 | 506 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); |
ea064aa0 | 507 | b->zv_marker = Fmake_marker (); |
3f236a40 | 508 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); |
26d84681 | 509 | XMARKER (b->zv_marker)->insertion_type = 1; |
336cd056 | 510 | |
a9ee7a59 | 511 | return buf; |
1ab256cb RM |
512 | } |
513 | ||
bcd40520 RS |
514 | /* Reinitialize everything about a buffer except its name and contents |
515 | and local variables. */ | |
1ab256cb RM |
516 | |
517 | void | |
518 | reset_buffer (b) | |
519 | register struct buffer *b; | |
520 | { | |
521 | b->filename = Qnil; | |
f6ed2e84 | 522 | b->file_truename = Qnil; |
1ab256cb RM |
523 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
524 | b->modtime = 0; | |
8d7a4592 | 525 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 526 | b->last_window_start = 1; |
8b264726 RS |
527 | /* It is more conservative to start out "changed" than "unchanged". */ |
528 | b->clip_changed = 1; | |
1ab256cb RM |
529 | b->backed_up = Qnil; |
530 | b->auto_save_modified = 0; | |
84f6bcba | 531 | b->auto_save_failure_time = -1; |
1ab256cb RM |
532 | b->auto_save_file_name = Qnil; |
533 | b->read_only = Qnil; | |
2eec3b4e RS |
534 | b->overlays_before = Qnil; |
535 | b->overlays_after = Qnil; | |
8d7a4592 | 536 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 537 | b->mark_active = Qnil; |
943e065b | 538 | b->point_before_scroll = Qnil; |
be9aafdd | 539 | b->file_format = Qnil; |
0dc6f165 | 540 | b->last_selected_window = Qnil; |
7962a441 | 541 | XSETINT (b->display_count, 0); |
3fd364db | 542 | b->display_time = Qnil; |
fb2030e3 RS |
543 | b->extra2 = Qnil; |
544 | b->extra3 = Qnil; | |
1bf08baf | 545 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
1ab256cb RM |
546 | } |
547 | ||
bcd40520 RS |
548 | /* Reset buffer B's local variables info. |
549 | Don't use this on a buffer that has already been in use; | |
550 | it does not treat permanent locals consistently. | |
13de9290 RS |
551 | Instead, use Fkill_all_local_variables. |
552 | ||
553 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
554 | buffer-local variables. If PERMANENT_TOO is 0, | |
555 | we preserve those. */ | |
bcd40520 | 556 | |
13de9290 RS |
557 | static void |
558 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 559 | register struct buffer *b; |
13de9290 | 560 | int permanent_too; |
1ab256cb RM |
561 | { |
562 | register int offset; | |
13de9290 RS |
563 | int dont_reset; |
564 | ||
565 | /* Decide which built-in local variables to reset. */ | |
566 | if (permanent_too) | |
567 | dont_reset = 0; | |
568 | else | |
569 | dont_reset = buffer_permanent_local_flags; | |
1ab256cb RM |
570 | |
571 | /* Reset the major mode to Fundamental, together with all the | |
572 | things that depend on the major mode. | |
573 | default-major-mode is handled at a higher level. | |
574 | We ignore it here. */ | |
575 | b->major_mode = Qfundamental_mode; | |
576 | b->keymap = Qnil; | |
577 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
578 | b->mode_name = QSFundamental; | |
579 | b->minor_modes = Qnil; | |
3446af9c RS |
580 | |
581 | /* If the standard case table has been altered and invalidated, | |
582 | fix up its insides first. */ | |
583 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
584 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
585 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
586 | Fset_standard_case_table (Vascii_downcase_table); | |
587 | ||
1ab256cb | 588 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
589 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
590 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
591 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 592 | b->invisibility_spec = Qt; |
2e716096 RS |
593 | #ifndef DOS_NT |
594 | b->buffer_file_type = Qnil; | |
595 | #endif | |
3cb719bd | 596 | |
1ab256cb RM |
597 | #if 0 |
598 | b->sort_table = XSTRING (Vascii_sort_table); | |
599 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
600 | #endif /* 0 */ | |
601 | ||
13de9290 | 602 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 603 | b->local_var_alist = Qnil; |
13de9290 | 604 | b->local_var_flags &= dont_reset; |
1ab256cb RM |
605 | |
606 | /* For each slot that has a default value, | |
607 | copy that into the slot. */ | |
608 | ||
609 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
610 | offset < sizeof (struct buffer); | |
4d2f1389 | 611 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
612 | { |
613 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
13de9290 RS |
614 | if ((flag > 0 |
615 | /* Don't reset a permanent local. */ | |
616 | && ! (dont_reset & flag)) | |
617 | || flag == -2) | |
618 | *(Lisp_Object *)(offset + (char *)b) | |
619 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
aab80822 | 620 | } |
1ab256cb RM |
621 | } |
622 | ||
01050cb5 RM |
623 | /* We split this away from generate-new-buffer, because rename-buffer |
624 | and set-visited-file-name ought to be able to use this to really | |
625 | rename the buffer properly. */ | |
626 | ||
627 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 628 | 1, 2, 0, |
01050cb5 RM |
629 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
630 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 631 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 632 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 633 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 634 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 635 | even if a buffer with that name exists.") |
c273e647 RS |
636 | (name, ignore) |
637 | register Lisp_Object name, ignore; | |
1ab256cb RM |
638 | { |
639 | register Lisp_Object gentemp, tem; | |
640 | int count; | |
641 | char number[10]; | |
642 | ||
643 | CHECK_STRING (name, 0); | |
644 | ||
645 | tem = Fget_buffer (name); | |
265a9e55 | 646 | if (NILP (tem)) |
01050cb5 | 647 | return name; |
1ab256cb RM |
648 | |
649 | count = 1; | |
650 | while (1) | |
651 | { | |
652 | sprintf (number, "<%d>", ++count); | |
653 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 654 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
655 | if (!NILP (tem)) |
656 | return gentemp; | |
1ab256cb | 657 | tem = Fget_buffer (gentemp); |
265a9e55 | 658 | if (NILP (tem)) |
01050cb5 | 659 | return gentemp; |
1ab256cb RM |
660 | } |
661 | } | |
662 | ||
663 | \f | |
664 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
665 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 666 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
667 | (buffer) |
668 | register Lisp_Object buffer; | |
669 | { | |
265a9e55 | 670 | if (NILP (buffer)) |
1ab256cb RM |
671 | return current_buffer->name; |
672 | CHECK_BUFFER (buffer, 0); | |
673 | return XBUFFER (buffer)->name; | |
674 | } | |
675 | ||
676 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
677 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
678 | No argument or nil as argument means use the current buffer.") | |
679 | (buffer) | |
680 | register Lisp_Object buffer; | |
681 | { | |
265a9e55 | 682 | if (NILP (buffer)) |
1ab256cb RM |
683 | return current_buffer->filename; |
684 | CHECK_BUFFER (buffer, 0); | |
685 | return XBUFFER (buffer)->filename; | |
686 | } | |
687 | ||
336cd056 RS |
688 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
689 | 0, 1, 0, | |
690 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
691 | If BUFFER is not indirect, return nil.") | |
692 | (buffer) | |
693 | register Lisp_Object buffer; | |
694 | { | |
695 | struct buffer *base; | |
696 | Lisp_Object base_buffer; | |
697 | ||
698 | if (NILP (buffer)) | |
699 | base = current_buffer->base_buffer; | |
700 | else | |
701 | { | |
702 | CHECK_BUFFER (buffer, 0); | |
703 | base = XBUFFER (buffer)->base_buffer; | |
704 | } | |
705 | ||
706 | if (! base) | |
707 | return Qnil; | |
708 | XSETBUFFER (base_buffer, base); | |
709 | return base_buffer; | |
710 | } | |
711 | ||
1ab256cb RM |
712 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
713 | Sbuffer_local_variables, 0, 1, 0, | |
714 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
715 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
716 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
717 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
718 | No argument or nil as argument means use current buffer as BUFFER.") | |
719 | (buffer) | |
720 | register Lisp_Object buffer; | |
721 | { | |
722 | register struct buffer *buf; | |
553defa4 | 723 | register Lisp_Object result; |
1ab256cb | 724 | |
265a9e55 | 725 | if (NILP (buffer)) |
1ab256cb RM |
726 | buf = current_buffer; |
727 | else | |
728 | { | |
729 | CHECK_BUFFER (buffer, 0); | |
730 | buf = XBUFFER (buffer); | |
731 | } | |
732 | ||
553defa4 RS |
733 | result = Qnil; |
734 | ||
1ab256cb | 735 | { |
553defa4 RS |
736 | register Lisp_Object tail; |
737 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 738 | { |
553defa4 RS |
739 | Lisp_Object val, elt; |
740 | ||
741 | elt = XCONS (tail)->car; | |
742 | ||
e0585c64 RS |
743 | /* Reference each variable in the alist in buf. |
744 | If inquiring about the current buffer, this gets the current values, | |
745 | so store them into the alist so the alist is up to date. | |
746 | If inquiring about some other buffer, this swaps out any values | |
747 | for that buffer, making the alist up to date automatically. */ | |
748 | val = find_symbol_value (XCONS (elt)->car); | |
749 | /* Use the current buffer value only if buf is the current buffer. */ | |
750 | if (buf != current_buffer) | |
553defa4 RS |
751 | val = XCONS (elt)->cdr; |
752 | ||
753 | /* If symbol is unbound, put just the symbol in the list. */ | |
754 | if (EQ (val, Qunbound)) | |
755 | result = Fcons (XCONS (elt)->car, result); | |
756 | /* Otherwise, put (symbol . value) in the list. */ | |
757 | else | |
758 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
759 | } |
760 | } | |
761 | ||
1ab256cb RM |
762 | /* Add on all the variables stored in special slots. */ |
763 | { | |
764 | register int offset, mask; | |
765 | ||
766 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
767 | offset < sizeof (struct buffer); | |
4d2f1389 | 768 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 769 | { |
aab80822 | 770 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 771 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
772 | if (SYMBOLP (*(Lisp_Object *)(offset |
773 | + (char *)&buffer_local_symbols))) | |
774 | result = Fcons (Fcons (*((Lisp_Object *) | |
775 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
776 | *(Lisp_Object *)(offset + (char *)buf)), |
777 | result); | |
1ab256cb RM |
778 | } |
779 | } | |
553defa4 RS |
780 | |
781 | return result; | |
1ab256cb RM |
782 | } |
783 | ||
784 | \f | |
785 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
786 | 0, 1, 0, | |
787 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
788 | No argument or nil as argument means use current buffer as BUFFER.") | |
789 | (buffer) | |
790 | register Lisp_Object buffer; | |
791 | { | |
792 | register struct buffer *buf; | |
265a9e55 | 793 | if (NILP (buffer)) |
1ab256cb RM |
794 | buf = current_buffer; |
795 | else | |
796 | { | |
797 | CHECK_BUFFER (buffer, 0); | |
798 | buf = XBUFFER (buffer); | |
799 | } | |
800 | ||
336cd056 | 801 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
802 | } |
803 | ||
804 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
805 | 1, 1, 0, | |
806 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
807 | A non-nil FLAG means mark the buffer modified.") | |
808 | (flag) | |
809 | register Lisp_Object flag; | |
810 | { | |
811 | register int already; | |
812 | register Lisp_Object fn; | |
813 | ||
814 | #ifdef CLASH_DETECTION | |
815 | /* If buffer becoming modified, lock the file. | |
816 | If buffer becoming unmodified, unlock the file. */ | |
817 | ||
60f4dd23 | 818 | fn = current_buffer->file_truename; |
90d456d2 KH |
819 | /* Test buffer-file-name so that binding it to nil is effective. */ |
820 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 821 | { |
336cd056 | 822 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 823 | if (!already && !NILP (flag)) |
1ab256cb | 824 | lock_file (fn); |
265a9e55 | 825 | else if (already && NILP (flag)) |
1ab256cb RM |
826 | unlock_file (fn); |
827 | } | |
828 | #endif /* CLASH_DETECTION */ | |
829 | ||
336cd056 | 830 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
831 | update_mode_lines++; |
832 | return flag; | |
833 | } | |
834 | ||
835 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
836 | 0, 1, 0, | |
837 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
838 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
839 | that buffer is changed. It wraps around occasionally.\n\ | |
840 | No argument or nil as argument means use current buffer as BUFFER.") | |
841 | (buffer) | |
842 | register Lisp_Object buffer; | |
843 | { | |
844 | register struct buffer *buf; | |
265a9e55 | 845 | if (NILP (buffer)) |
1ab256cb RM |
846 | buf = current_buffer; |
847 | else | |
848 | { | |
849 | CHECK_BUFFER (buffer, 0); | |
850 | buf = XBUFFER (buffer); | |
851 | } | |
852 | ||
853 | return make_number (BUF_MODIFF (buf)); | |
854 | } | |
855 | \f | |
01050cb5 | 856 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 857 | "sRename buffer (to new name): \nP", |
1ab256cb | 858 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 859 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 860 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 861 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 862 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
863 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
864 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 865 | This does not change the name of the visited file (if any).") |
489c043a RS |
866 | (newname, unique) |
867 | register Lisp_Object newname, unique; | |
1ab256cb RM |
868 | { |
869 | register Lisp_Object tem, buf; | |
870 | ||
489c043a | 871 | CHECK_STRING (newname, 0); |
d59698c4 | 872 | |
489c043a | 873 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
874 | error ("Empty string is invalid as a buffer name"); |
875 | ||
489c043a | 876 | tem = Fget_buffer (newname); |
c059b5ea RM |
877 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
878 | the buffer automatically so you can create another with the original name. | |
879 | It makes UNIQUE equivalent to | |
489c043a | 880 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 881 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 882 | return current_buffer->name; |
265a9e55 | 883 | if (!NILP (tem)) |
01050cb5 | 884 | { |
3bd779aa | 885 | if (!NILP (unique)) |
489c043a | 886 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 887 | else |
489c043a | 888 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 889 | } |
1ab256cb | 890 | |
489c043a | 891 | current_buffer->name = newname; |
76f590d7 JB |
892 | |
893 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
894 | any windows displaying current_buffer will stay unchanged. */ | |
895 | update_mode_lines++; | |
896 | ||
67180c6a | 897 | XSETBUFFER (buf, current_buffer); |
489c043a | 898 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
899 | if (NILP (current_buffer->filename) |
900 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 901 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
902 | /* Refetch since that last call may have done GC. */ |
903 | return current_buffer->name; | |
1ab256cb RM |
904 | } |
905 | ||
773fbdb9 | 906 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
1ab256cb | 907 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
908 | Buffers not visible in windows are preferred to visible buffers,\n\ |
909 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
97c3c30c RS |
910 | If the optional third argument FRAME is non-nil, use that frame's\n\ |
911 | buffer list instead of the selected frame's buffer list.\n\ | |
1ab256cb RM |
912 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
913 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
773fbdb9 RS |
914 | (buffer, visible_ok, frame) |
915 | register Lisp_Object buffer, visible_ok, frame; | |
1ab256cb | 916 | { |
89132f25 | 917 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 918 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
919 | notsogood = Qnil; |
920 | ||
773fbdb9 RS |
921 | if (NILP (frame)) |
922 | frame = Fselected_frame (); | |
923 | ||
7962a441 | 924 | tail = Vbuffer_alist; |
773fbdb9 | 925 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
926 | |
927 | /* Consider buffers that have been seen in the selected frame | |
928 | before other buffers. */ | |
929 | ||
773fbdb9 | 930 | tem = frame_buffer_list (frame); |
7962a441 RS |
931 | add_ons = Qnil; |
932 | while (CONSP (tem)) | |
933 | { | |
934 | if (BUFFERP (XCONS (tem)->car)) | |
935 | add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons); | |
936 | tem = XCONS (tem)->cdr; | |
937 | } | |
938 | tail = nconc2 (Fnreverse (add_ons), tail); | |
939 | ||
940 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
941 | { |
942 | buf = Fcdr (Fcar (tail)); | |
943 | if (EQ (buf, buffer)) | |
944 | continue; | |
945 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
946 | continue; | |
04ae1b48 RS |
947 | /* If the selected frame has a buffer_predicate, |
948 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 949 | if (!NILP (pred)) |
04ae1b48 | 950 | { |
7962a441 | 951 | tem = call1 (pred, buf); |
04ae1b48 RS |
952 | if (NILP (tem)) |
953 | continue; | |
954 | } | |
04ae1b48 | 955 | |
a0ebb746 | 956 | if (NILP (visible_ok)) |
db732e5a | 957 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
958 | else |
959 | tem = Qnil; | |
265a9e55 | 960 | if (NILP (tem)) |
1ab256cb | 961 | return buf; |
265a9e55 | 962 | if (NILP (notsogood)) |
1ab256cb RM |
963 | notsogood = buf; |
964 | } | |
265a9e55 | 965 | if (!NILP (notsogood)) |
1ab256cb | 966 | return notsogood; |
89132f25 KH |
967 | buf = Fget_buffer_create (build_string ("*scratch*")); |
968 | Fset_buffer_major_mode (buf); | |
969 | return buf; | |
1ab256cb RM |
970 | } |
971 | \f | |
316784fb KH |
972 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
973 | 0, 1, "", | |
5b8bcf48 RS |
974 | "Make BUFFER stop keeping undo information.\n\ |
975 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
976 | (buffer) |
977 | register Lisp_Object buffer; | |
1ab256cb | 978 | { |
ffd56f97 JB |
979 | Lisp_Object real_buffer; |
980 | ||
981 | if (NILP (buffer)) | |
67180c6a | 982 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
983 | else |
984 | { | |
985 | real_buffer = Fget_buffer (buffer); | |
986 | if (NILP (real_buffer)) | |
987 | nsberror (buffer); | |
988 | } | |
989 | ||
990 | XBUFFER (real_buffer)->undo_list = Qt; | |
991 | ||
1ab256cb RM |
992 | return Qnil; |
993 | } | |
994 | ||
995 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
996 | 0, 1, "", | |
997 | "Start keeping undo information for buffer BUFFER.\n\ | |
998 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
999 | (buffer) |
1000 | register Lisp_Object buffer; | |
1ab256cb | 1001 | { |
ffd56f97 | 1002 | Lisp_Object real_buffer; |
1ab256cb | 1003 | |
ffd56f97 | 1004 | if (NILP (buffer)) |
67180c6a | 1005 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1006 | else |
1007 | { | |
ffd56f97 JB |
1008 | real_buffer = Fget_buffer (buffer); |
1009 | if (NILP (real_buffer)) | |
1010 | nsberror (buffer); | |
1ab256cb RM |
1011 | } |
1012 | ||
ffd56f97 JB |
1013 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1014 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1015 | |
1016 | return Qnil; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1021 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1022 | The buffer being killed will be current while the hook is running.\n\ | |
1023 | See `kill-buffer'." | |
1024 | */ | |
1025 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
1026 | "Kill the buffer BUFFER.\n\ | |
1027 | The argument may be a buffer or may be the name of a buffer.\n\ | |
1028 | An argument of nil means kill the current buffer.\n\n\ | |
1029 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
1030 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
1031 | if not void, is a list of functions to be called, with no arguments,\n\ | |
1032 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
1033 | when the hook functions are called.\n\n\ | |
1034 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 1035 | with SIGHUP.") |
a25f13ae KH |
1036 | (buffer) |
1037 | Lisp_Object buffer; | |
1ab256cb RM |
1038 | { |
1039 | Lisp_Object buf; | |
1040 | register struct buffer *b; | |
1041 | register Lisp_Object tem; | |
1042 | register struct Lisp_Marker *m; | |
1043 | struct gcpro gcpro1, gcpro2; | |
1044 | ||
a25f13ae | 1045 | if (NILP (buffer)) |
1ab256cb RM |
1046 | buf = Fcurrent_buffer (); |
1047 | else | |
a25f13ae | 1048 | buf = Fget_buffer (buffer); |
265a9e55 | 1049 | if (NILP (buf)) |
a25f13ae | 1050 | nsberror (buffer); |
1ab256cb RM |
1051 | |
1052 | b = XBUFFER (buf); | |
1053 | ||
4a4a9db5 KH |
1054 | /* Avoid trouble for buffer already dead. */ |
1055 | if (NILP (b->name)) | |
1056 | return Qnil; | |
1057 | ||
1ab256cb | 1058 | /* Query if the buffer is still modified. */ |
265a9e55 | 1059 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1060 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1061 | { |
a25f13ae | 1062 | GCPRO1 (buf); |
1ab256cb RM |
1063 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
1064 | XSTRING (b->name)->data)); | |
1065 | UNGCPRO; | |
265a9e55 | 1066 | if (NILP (tem)) |
1ab256cb RM |
1067 | return Qnil; |
1068 | } | |
1069 | ||
dcdffbf6 | 1070 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
1071 | { |
1072 | register Lisp_Object val; | |
1073 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 1074 | Lisp_Object list; |
1ab256cb RM |
1075 | |
1076 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1077 | set_buffer_internal (b); | |
dcdffbf6 RS |
1078 | |
1079 | /* First run the query functions; if any query is answered no, | |
1080 | don't kill the buffer. */ | |
1081 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1082 | { | |
1083 | tem = call0 (Fcar (list)); | |
1084 | if (NILP (tem)) | |
1085 | return unbind_to (count, Qnil); | |
1086 | } | |
1087 | ||
1088 | /* Then run the hooks. */ | |
fd186f07 RS |
1089 | if (!NILP (Vrun_hooks)) |
1090 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1091 | unbind_to (count, Qnil); |
1092 | } | |
1093 | ||
1094 | /* We have no more questions to ask. Verify that it is valid | |
1095 | to kill the buffer. This must be done after the questions | |
1096 | since anything can happen within do_yes_or_no_p. */ | |
1097 | ||
1098 | /* Don't kill the minibuffer now current. */ | |
1099 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1100 | return Qnil; | |
1101 | ||
265a9e55 | 1102 | if (NILP (b->name)) |
1ab256cb RM |
1103 | return Qnil; |
1104 | ||
336cd056 RS |
1105 | /* When we kill a base buffer, kill all its indirect buffers. |
1106 | We do it at this stage so nothing terrible happens if they | |
1107 | ask questions or their hooks get errors. */ | |
1108 | if (! b->base_buffer) | |
1109 | { | |
1110 | struct buffer *other; | |
1111 | ||
1112 | GCPRO1 (buf); | |
1113 | ||
1114 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1115 | /* all_buffers contains dead buffers too; |
1116 | don't re-kill them. */ | |
1117 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1118 | { |
1119 | Lisp_Object buf; | |
1120 | XSETBUFFER (buf, other); | |
1121 | Fkill_buffer (buf); | |
1122 | } | |
1123 | ||
1124 | UNGCPRO; | |
1125 | } | |
1126 | ||
1ab256cb RM |
1127 | /* Make this buffer not be current. |
1128 | In the process, notice if this is the sole visible buffer | |
1129 | and give up if so. */ | |
1130 | if (b == current_buffer) | |
1131 | { | |
773fbdb9 | 1132 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1133 | Fset_buffer (tem); |
1134 | if (b == current_buffer) | |
1135 | return Qnil; | |
1136 | } | |
1137 | ||
1138 | /* Now there is no question: we can kill the buffer. */ | |
1139 | ||
1140 | #ifdef CLASH_DETECTION | |
1141 | /* Unlock this buffer's file, if it is locked. */ | |
1142 | unlock_buffer (b); | |
1143 | #endif /* CLASH_DETECTION */ | |
1144 | ||
1ab256cb | 1145 | kill_buffer_processes (buf); |
1ab256cb RM |
1146 | |
1147 | tem = Vinhibit_quit; | |
1148 | Vinhibit_quit = Qt; | |
00550f94 | 1149 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1150 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1151 | frames_discard_buffer (buf); |
1ab256cb RM |
1152 | Vinhibit_quit = tem; |
1153 | ||
9b59d6d0 | 1154 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1155 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1156 | && b->auto_save_modified != 0 |
30e0071c | 1157 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified) |
1ab256cb RM |
1158 | { |
1159 | Lisp_Object tem; | |
1160 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1161 | if (! NILP (tem)) |
cbb6a418 | 1162 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1163 | } |
1164 | ||
4a4a9db5 KH |
1165 | if (b->base_buffer) |
1166 | { | |
1167 | /* Unchain all markers that belong to this indirect buffer. | |
1168 | Don't unchain the markers that belong to the base buffer | |
1169 | or its other indirect buffers. */ | |
1170 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1171 | { | |
1172 | Lisp_Object next; | |
1173 | m = XMARKER (tem); | |
1174 | next = m->chain; | |
1175 | if (m->buffer == b) | |
1176 | unchain_marker (tem); | |
1177 | tem = next; | |
1178 | } | |
1179 | } | |
1180 | else | |
1ab256cb | 1181 | { |
4a4a9db5 | 1182 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1183 | and leave them pointing nowhere. */ |
4a4a9db5 | 1184 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1185 | { |
1186 | m = XMARKER (tem); | |
1187 | m->buffer = 0; | |
1188 | tem = m->chain; | |
1189 | m->chain = Qnil; | |
1190 | } | |
1191 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1192 | |
336cd056 RS |
1193 | #ifdef USE_TEXT_PROPERTIES |
1194 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1195 | #endif | |
1196 | ||
1197 | /* Perhaps we should explicitly free the interval tree here... */ | |
1198 | } | |
33f7013e | 1199 | |
2f3f993b RS |
1200 | /* Reset the local variables, so that this buffer's local values |
1201 | won't be protected from GC. They would be protected | |
1202 | if they happened to remain encached in their symbols. | |
1203 | This gets rid of them for certain. */ | |
1204 | swap_out_buffer_local_variables (b); | |
13de9290 | 1205 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1206 | |
1ab256cb | 1207 | b->name = Qnil; |
336cd056 | 1208 | |
9ac0d9e0 | 1209 | BLOCK_INPUT; |
336cd056 RS |
1210 | if (! b->base_buffer) |
1211 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1212 | ||
28e969dd JB |
1213 | if (b->newline_cache) |
1214 | { | |
1215 | free_region_cache (b->newline_cache); | |
1216 | b->newline_cache = 0; | |
1217 | } | |
1218 | if (b->width_run_cache) | |
1219 | { | |
1220 | free_region_cache (b->width_run_cache); | |
1221 | b->width_run_cache = 0; | |
1222 | } | |
1223 | b->width_table = Qnil; | |
0552666b GM |
1224 | #if !NO_PROMPT_IN_BUFFER |
1225 | b->minibuffer_prompt_length = Qnil; | |
1226 | #endif | |
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 | ||
1ab256cb RM |
1323 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1324 | "Select buffer BUFFER in the current window.\n\ | |
1325 | BUFFER may be a buffer or a buffer name.\n\ | |
1326 | Optional second arg NORECORD non-nil means\n\ | |
1327 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1328 | \n\ | |
1329 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1330 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1331 | the window-buffer correspondences.") | |
a25f13ae KH |
1332 | (buffer, norecord) |
1333 | Lisp_Object buffer, norecord; | |
1ab256cb RM |
1334 | { |
1335 | register Lisp_Object buf; | |
1336 | Lisp_Object tem; | |
1337 | ||
1338 | if (EQ (minibuf_window, selected_window)) | |
1339 | error ("Cannot switch buffers in minibuffer window"); | |
1340 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1341 | if (!NILP (tem)) |
1ab256cb RM |
1342 | error ("Cannot switch buffers in a dedicated window"); |
1343 | ||
a25f13ae | 1344 | if (NILP (buffer)) |
773fbdb9 | 1345 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1346 | else |
a9ee7a59 | 1347 | { |
a25f13ae | 1348 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1349 | if (NILP (buf)) |
1350 | { | |
a25f13ae | 1351 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1352 | Fset_buffer_major_mode (buf); |
1353 | } | |
1354 | } | |
1ab256cb | 1355 | Fset_buffer (buf); |
265a9e55 | 1356 | if (NILP (norecord)) |
1ab256cb RM |
1357 | record_buffer (buf); |
1358 | ||
1359 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1360 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1361 | : selected_window, | |
1ab256cb RM |
1362 | buf); |
1363 | ||
cd0c235a | 1364 | return buf; |
1ab256cb RM |
1365 | } |
1366 | ||
cd0c235a | 1367 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
1ab256cb RM |
1368 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
1369 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1370 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1371 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1372 | window even if BUFFER is already visible in the selected window.\n\ |
1373 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
6d12711f RS |
1374 | of `display-buffer' for additional customization information.\n\ |
1375 | \n\ | |
1376 | Optional third arg NORECORD non-nil means\n\ | |
1377 | do not put this buffer at the front of the list of recently selected ones.") | |
1378 | (buffer, other_window, norecord) | |
1379 | Lisp_Object buffer, other_window, norecord; | |
1ab256cb RM |
1380 | { |
1381 | register Lisp_Object buf; | |
a25f13ae | 1382 | if (NILP (buffer)) |
773fbdb9 | 1383 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1384 | else |
7c2087ee | 1385 | { |
a25f13ae | 1386 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1387 | if (NILP (buf)) |
1388 | { | |
a25f13ae | 1389 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1390 | Fset_buffer_major_mode (buf); |
1391 | } | |
1392 | } | |
1ab256cb | 1393 | Fset_buffer (buf); |
6d12711f RS |
1394 | if (NILP (norecord)) |
1395 | record_buffer (buf); | |
6b17d756 | 1396 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1397 | return buf; |
1ab256cb RM |
1398 | } |
1399 | ||
1400 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1401 | "Return the current buffer as a Lisp object.") | |
1402 | () | |
1403 | { | |
1404 | register Lisp_Object buf; | |
67180c6a | 1405 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1406 | return buf; |
1407 | } | |
1408 | \f | |
c7aa5005 | 1409 | /* Set the current buffer to B. */ |
1ab256cb RM |
1410 | |
1411 | void | |
1412 | set_buffer_internal (b) | |
1413 | register struct buffer *b; | |
1414 | { | |
1415 | register struct buffer *old_buf; | |
1416 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1417 | Lisp_Object tem; |
1ab256cb RM |
1418 | |
1419 | if (current_buffer == b) | |
1420 | return; | |
1421 | ||
0552666b | 1422 | /* Otherwise, force-mode-line-update doesn't work as expected. */ |
1ab256cb | 1423 | windows_or_buffers_changed = 1; |
c7aa5005 KH |
1424 | set_buffer_internal_1 (b); |
1425 | } | |
1426 | ||
1427 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1428 | This is used by redisplay. */ | |
1429 | ||
1430 | void | |
1431 | set_buffer_internal_1 (b) | |
1432 | register struct buffer *b; | |
1433 | { | |
1434 | register struct buffer *old_buf; | |
1435 | register Lisp_Object tail, valcontents; | |
1436 | Lisp_Object tem; | |
1437 | ||
1438 | if (current_buffer == b) | |
1439 | return; | |
1440 | ||
1ab256cb RM |
1441 | old_buf = current_buffer; |
1442 | current_buffer = b; | |
1443 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1444 | ||
336cd056 RS |
1445 | if (old_buf) |
1446 | { | |
1447 | /* Put the undo list back in the base buffer, so that it appears | |
1448 | that an indirect buffer shares the undo list of its base. */ | |
1449 | if (old_buf->base_buffer) | |
1450 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1451 | ||
1452 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1453 | when it is not current, update them now. */ | |
1454 | if (! NILP (old_buf->pt_marker)) | |
1455 | { | |
1456 | Lisp_Object obuf; | |
1457 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1458 | set_marker_both (old_buf->pt_marker, obuf, |
1459 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1460 | } |
1461 | if (! NILP (old_buf->begv_marker)) | |
1462 | { | |
1463 | Lisp_Object obuf; | |
1464 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1465 | set_marker_both (old_buf->begv_marker, obuf, |
1466 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1467 | } |
1468 | if (! NILP (old_buf->zv_marker)) | |
1469 | { | |
1470 | Lisp_Object obuf; | |
1471 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1472 | set_marker_both (old_buf->zv_marker, obuf, |
1473 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1474 | } |
1475 | } | |
1476 | ||
1477 | /* Get the undo list from the base buffer, so that it appears | |
1478 | that an indirect buffer shares the undo list of its base. */ | |
1479 | if (b->base_buffer) | |
1480 | b->undo_list = b->base_buffer->undo_list; | |
1481 | ||
1482 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1483 | when it is not current, fetch them now. */ | |
1484 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1485 | { |
1486 | BUF_PT (b) = marker_position (b->pt_marker); | |
1487 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1488 | } | |
336cd056 | 1489 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1490 | { |
1491 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1492 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1493 | } | |
336cd056 | 1494 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1495 | { |
1496 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1497 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1498 | } | |
336cd056 | 1499 | |
1ab256cb RM |
1500 | /* Look down buffer's list of local Lisp variables |
1501 | to find and update any that forward into C variables. */ | |
1502 | ||
265a9e55 | 1503 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1504 | { |
1505 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1506 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1507 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1508 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1509 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1510 | /* Just reference the variable |
1511 | to cause it to become set for this buffer. */ | |
1512 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1513 | } | |
1514 | ||
1515 | /* Do the same with any others that were local to the previous buffer */ | |
1516 | ||
1517 | if (old_buf) | |
265a9e55 | 1518 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1519 | { |
1520 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1521 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1522 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1523 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1524 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1525 | /* Just reference the variable |
1526 | to cause it to become set for this buffer. */ | |
1527 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1528 | } | |
1529 | } | |
1530 | ||
336cd056 | 1531 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1532 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1533 | |
1534 | void | |
1535 | set_buffer_temp (b) | |
1536 | struct buffer *b; | |
1537 | { | |
1538 | register struct buffer *old_buf; | |
1539 | ||
1540 | if (current_buffer == b) | |
1541 | return; | |
1542 | ||
1543 | old_buf = current_buffer; | |
1544 | current_buffer = b; | |
1545 | ||
1546 | if (old_buf) | |
1547 | { | |
1548 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1549 | when it is not current, update them now. */ | |
1550 | if (! NILP (old_buf->pt_marker)) | |
1551 | { | |
1552 | Lisp_Object obuf; | |
1553 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1554 | set_marker_both (old_buf->pt_marker, obuf, |
1555 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1556 | } |
1557 | if (! NILP (old_buf->begv_marker)) | |
1558 | { | |
1559 | Lisp_Object obuf; | |
1560 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1561 | set_marker_both (old_buf->begv_marker, obuf, |
1562 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1563 | } |
1564 | if (! NILP (old_buf->zv_marker)) | |
1565 | { | |
1566 | Lisp_Object obuf; | |
1567 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1568 | set_marker_both (old_buf->zv_marker, obuf, |
1569 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1570 | } |
1571 | } | |
1572 | ||
1573 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1574 | when it is not current, fetch them now. */ | |
1575 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1576 | { |
1577 | BUF_PT (b) = marker_position (b->pt_marker); | |
1578 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1579 | } | |
336cd056 | 1580 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1581 | { |
1582 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1583 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1584 | } | |
336cd056 | 1585 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1586 | { |
1587 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1588 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1589 | } | |
336cd056 RS |
1590 | } |
1591 | ||
1ab256cb RM |
1592 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1593 | "Make the buffer BUFFER current for editing operations.\n\ | |
1594 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1595 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1596 | This function does not display the buffer, so its effect ends\n\ | |
1597 | when the current command terminates.\n\ | |
1598 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1599 | (buffer) |
1600 | register Lisp_Object buffer; | |
1ab256cb | 1601 | { |
a25f13ae KH |
1602 | register Lisp_Object buf; |
1603 | buf = Fget_buffer (buffer); | |
1604 | if (NILP (buf)) | |
1605 | nsberror (buffer); | |
1606 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1607 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1608 | set_buffer_internal (XBUFFER (buf)); |
1609 | return buf; | |
1ab256cb | 1610 | } |
d0628b06 RS |
1611 | |
1612 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1613 | ||
1614 | Lisp_Object | |
1615 | set_buffer_if_live (buffer) | |
1616 | Lisp_Object buffer; | |
1617 | { | |
1618 | if (! NILP (XBUFFER (buffer)->name)) | |
1619 | Fset_buffer (buffer); | |
1620 | return Qnil; | |
1621 | } | |
1ab256cb RM |
1622 | \f |
1623 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1624 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1625 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1626 | () | |
1627 | { | |
a96b68f1 RS |
1628 | if (!NILP (current_buffer->read_only) |
1629 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1630 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1631 | return Qnil; | |
1632 | } | |
1633 | ||
1634 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1635 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1636 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1637 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1638 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1639 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1640 | selected window if it is displayed there.") | |
a2428fa2 EN |
1641 | (buffer) |
1642 | register Lisp_Object buffer; | |
1ab256cb | 1643 | { |
b271272a | 1644 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1645 | if (NILP (buffer)) |
a5611885 | 1646 | { |
a2428fa2 | 1647 | XSETBUFFER (buffer, current_buffer); |
0a63b212 RS |
1648 | |
1649 | /* If we're burying the current buffer, unshow it. */ | |
773fbdb9 | 1650 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); |
a5611885 | 1651 | } |
1ab256cb RM |
1652 | else |
1653 | { | |
1654 | Lisp_Object buf1; | |
1655 | ||
a2428fa2 | 1656 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1657 | if (NILP (buf1)) |
a2428fa2 EN |
1658 | nsberror (buffer); |
1659 | buffer = buf1; | |
b271272a JB |
1660 | } |
1661 | ||
a2428fa2 | 1662 | /* Move buffer to the end of the buffer list. */ |
b271272a JB |
1663 | { |
1664 | register Lisp_Object aelt, link; | |
1665 | ||
a2428fa2 | 1666 | aelt = Frassq (buffer, Vbuffer_alist); |
b271272a JB |
1667 | link = Fmemq (aelt, Vbuffer_alist); |
1668 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1669 | XCONS (link)->cdr = Qnil; | |
1670 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1671 | } | |
1ab256cb | 1672 | |
dcb26650 | 1673 | frames_bury_buffer (buffer); |
dec989eb | 1674 | |
1ab256cb RM |
1675 | return Qnil; |
1676 | } | |
1677 | \f | |
c922bc55 | 1678 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1679 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1680 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1681 | so the buffer is truly empty after this.") |
1682 | () | |
1683 | { | |
1684 | Fwiden (); | |
1685 | del_range (BEG, Z); | |
1686 | current_buffer->last_window_start = 1; | |
1687 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1688 | if future size is less than past size. Use of erase-buffer | |
1689 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1690 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1691 | return Qnil; |
1692 | } | |
1693 | ||
01136e9b | 1694 | void |
1ab256cb RM |
1695 | validate_region (b, e) |
1696 | register Lisp_Object *b, *e; | |
1697 | { | |
1ab256cb RM |
1698 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1699 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1700 | ||
1701 | if (XINT (*b) > XINT (*e)) | |
1702 | { | |
03192067 KH |
1703 | Lisp_Object tem; |
1704 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1705 | } |
1706 | ||
1707 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1708 | && XINT (*e) <= ZV)) | |
1709 | args_out_of_range (*b, *e); | |
1710 | } | |
1711 | \f | |
b05525fa RS |
1712 | /* Advance BYTE_POS up to a character boundary |
1713 | and return the adjusted position. */ | |
1714 | ||
1715 | static int | |
1716 | advance_to_char_boundary (byte_pos) | |
1717 | int byte_pos; | |
1718 | { | |
f8449323 | 1719 | int c; |
b05525fa | 1720 | |
f8449323 RS |
1721 | if (byte_pos == BEG) |
1722 | /* Beginning of buffer is always a character boundary. */ | |
1723 | return 1; | |
1724 | ||
1725 | c = FETCH_BYTE (byte_pos); | |
1726 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1727 | { |
f8449323 RS |
1728 | /* We should advance BYTE_POS only when C is a constituen of a |
1729 | multibyte sequence. */ | |
1730 | DEC_POS (byte_pos); | |
1731 | INC_POS (byte_pos); | |
1732 | /* If C is a constituent of a multibyte sequence, BYTE_POS was | |
1733 | surely advance to the correct character boundary. If C is | |
1734 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
1735 | } |
1736 | ||
20773569 | 1737 | return byte_pos; |
b05525fa RS |
1738 | } |
1739 | ||
3ac81adb RS |
1740 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
1741 | 1, 1, 0, | |
1742 | "Set the multibyte flag of the current buffer to FLAG.\n\ | |
1743 | If FLAG is t, this makes the buffer a multibyte buffer.\n\ | |
1744 | If FLAG is nil, this makes the buffer a single-byte buffer.\n\ | |
1745 | The buffer contents remain unchanged as a sequence of bytes\n\ | |
1746 | but the contents viewed as characters do change.") | |
1747 | (flag) | |
1748 | Lisp_Object flag; | |
1749 | { | |
1750 | Lisp_Object tail, markers; | |
abc9d959 | 1751 | struct buffer *other; |
3ac81adb | 1752 | |
6e553d5e RS |
1753 | if (current_buffer->base_buffer) |
1754 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
1755 | ||
70e77119 AS |
1756 | /* Do nothing if nothing actually changes. */ |
1757 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
1758 | return flag; | |
1759 | ||
b05525fa RS |
1760 | /* It would be better to update the list, |
1761 | but this is good enough for now. */ | |
1762 | if (! EQ (current_buffer->undo_list, Qt)) | |
1763 | current_buffer->undo_list = Qnil; | |
1764 | ||
3ac81adb RS |
1765 | /* If the cached position is for this buffer, clear it out. */ |
1766 | clear_charpos_cache (current_buffer); | |
1767 | ||
1768 | if (NILP (flag)) | |
1769 | { | |
1770 | /* Do this first, so it can use CHAR_TO_BYTE | |
1771 | to calculate the old correspondences. */ | |
1772 | set_intervals_multibyte (0); | |
1773 | ||
1774 | current_buffer->enable_multibyte_characters = Qnil; | |
1775 | ||
1776 | Z = Z_BYTE; | |
1777 | BEGV = BEGV_BYTE; | |
1778 | ZV = ZV_BYTE; | |
1779 | GPT = GPT_BYTE; | |
1780 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
1781 | ||
1782 | tail = BUF_MARKERS (current_buffer); | |
1783 | while (XSYMBOL (tail) != XSYMBOL (Qnil)) | |
1784 | { | |
1785 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
1786 | tail = XMARKER (tail)->chain; | |
1787 | } | |
1788 | } | |
1789 | else | |
1790 | { | |
673c57d2 KH |
1791 | /* Be sure not to have a multibyte sequence striding over the GAP. |
1792 | Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..." | |
1793 | to: "...abc _GAP_ \201\241\241\241\241\241..." */ | |
1794 | ||
1795 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
1796 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
1797 | { | |
1798 | unsigned char *p = GPT_ADDR - 1; | |
1799 | ||
1800 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
1801 | if (BASE_LEADING_CODE_P (*p)) | |
1802 | { | |
1803 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
1804 | ||
1805 | move_gap_both (new_gpt, new_gpt); | |
1806 | } | |
1807 | } | |
1808 | ||
3ac81adb RS |
1809 | /* Do this first, so that chars_in_text asks the right question. |
1810 | set_intervals_multibyte needs it too. */ | |
1811 | current_buffer->enable_multibyte_characters = Qt; | |
1812 | ||
b05525fa | 1813 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 1814 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 1815 | |
673c57d2 | 1816 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
1817 | |
1818 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 1819 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 1820 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
1821 | else |
1822 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
1823 | |
1824 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 1825 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 1826 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
1827 | else |
1828 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
1829 | |
1830 | { | |
1831 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
1832 | int pt; | |
1833 | ||
1834 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 1835 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
1836 | else |
1837 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
1838 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
1839 | } | |
3ac81adb RS |
1840 | |
1841 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
1842 | |
1843 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
1844 | getting confused by the markers that have not yet been updated. | |
1845 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
1846 | BUF_MARKERS (current_buffer) = Qnil; |
1847 | ||
1848 | while (XSYMBOL (tail) != XSYMBOL (Qnil)) | |
1849 | { | |
b05525fa RS |
1850 | XMARKER (tail)->bytepos |
1851 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 1852 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 1853 | |
3ac81adb RS |
1854 | tail = XMARKER (tail)->chain; |
1855 | } | |
b69f9797 RS |
1856 | |
1857 | /* Make sure no markers were put on the chain | |
1858 | while the chain value was incorrect. */ | |
1859 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
1860 | abort (); | |
1861 | ||
3ac81adb RS |
1862 | BUF_MARKERS (current_buffer) = markers; |
1863 | ||
1864 | /* Do this last, so it can calculate the new correspondences | |
1865 | between chars and bytes. */ | |
1866 | set_intervals_multibyte (1); | |
1867 | } | |
1868 | ||
abc9d959 RS |
1869 | /* Copy this buffer's new multibyte status |
1870 | into all of its indirect buffers. */ | |
1871 | for (other = all_buffers; other; other = other->next) | |
1872 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
1873 | other->enable_multibyte_characters | |
1874 | = current_buffer->enable_multibyte_characters; | |
1875 | ||
3ac81adb RS |
1876 | return flag; |
1877 | } | |
1878 | \f | |
1ab256cb RM |
1879 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1880 | 0, 0, 0, | |
1881 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1882 | Most local variable bindings are eliminated so that the default values\n\ | |
1883 | become effective once more. Also, the syntax table is set from\n\ | |
1884 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1885 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1886 | This function also forces redisplay of the mode line.\n\ | |
1887 | \n\ | |
1888 | Every function to select a new major mode starts by\n\ | |
1889 | calling this function.\n\n\ | |
1890 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1891 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1892 | \n\ | |
1893 | The first thing this function does is run\n\ | |
1894 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1895 | () |
1896 | { | |
1897 | register Lisp_Object alist, sym, tem; | |
1898 | Lisp_Object oalist; | |
7410477a | 1899 | |
fd186f07 RS |
1900 | if (!NILP (Vrun_hooks)) |
1901 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1902 | oalist = current_buffer->local_var_alist; |
1903 | ||
2f3f993b RS |
1904 | /* Make sure none of the bindings in oalist |
1905 | remain swapped in, in their symbols. */ | |
1ab256cb | 1906 | |
2f3f993b | 1907 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
1908 | |
1909 | /* Actually eliminate all local bindings of this buffer. */ | |
1910 | ||
13de9290 | 1911 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
1912 | |
1913 | /* Redisplay mode lines; we are changing major mode. */ | |
1914 | ||
1915 | update_mode_lines++; | |
1916 | ||
1917 | /* Any which are supposed to be permanent, | |
1918 | make local again, with the same values they had. */ | |
1919 | ||
265a9e55 | 1920 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1921 | { |
1922 | sym = XCONS (XCONS (alist)->car)->car; | |
1923 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1924 | if (! NILP (tem)) |
01050cb5 RM |
1925 | { |
1926 | Fmake_local_variable (sym); | |
1927 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1928 | } | |
1ab256cb RM |
1929 | } |
1930 | ||
1931 | /* Force mode-line redisplay. Useful here because all major mode | |
1932 | commands call this function. */ | |
1933 | update_mode_lines++; | |
1934 | ||
1935 | return Qnil; | |
1936 | } | |
2f3f993b RS |
1937 | |
1938 | /* Make sure no local variables remain set up with buffer B | |
1939 | for their current values. */ | |
1940 | ||
1941 | static void | |
1942 | swap_out_buffer_local_variables (b) | |
1943 | struct buffer *b; | |
1944 | { | |
1945 | Lisp_Object oalist, alist, sym, tem, buffer; | |
1946 | ||
1947 | XSETBUFFER (buffer, b); | |
1948 | oalist = b->local_var_alist; | |
1949 | ||
1950 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) | |
1951 | { | |
1952 | sym = XCONS (XCONS (alist)->car)->car; | |
1953 | ||
1954 | /* Need not do anything if some other buffer's binding is now encached. */ | |
3d871c85 | 1955 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer; |
2f3f993b RS |
1956 | if (XBUFFER (tem) == current_buffer) |
1957 | { | |
1958 | /* Symbol is set up for this buffer's old local value. | |
1959 | Set it up for the current buffer with the default value. */ | |
1960 | ||
3d871c85 | 1961 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr; |
2f3f993b RS |
1962 | /* Store the symbol's current value into the alist entry |
1963 | it is currently set up for. This is so that, if the | |
1964 | local is marked permanent, and we make it local again | |
1965 | later in Fkill_all_local_variables, we don't lose the value. */ | |
1966 | XCONS (XCONS (tem)->car)->cdr | |
3d871c85 | 1967 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue); |
2f3f993b RS |
1968 | /* Switch to the symbol's default-value alist entry. */ |
1969 | XCONS (tem)->car = tem; | |
1970 | /* Mark it as current for buffer B. */ | |
3d871c85 | 1971 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer = buffer; |
2f3f993b | 1972 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 RS |
1973 | store_symval_forwarding (sym, |
1974 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue, | |
2f3f993b RS |
1975 | XCONS (tem)->cdr); |
1976 | } | |
1977 | } | |
1978 | } | |
1ab256cb | 1979 | \f |
2eec3b4e RS |
1980 | /* Find all the overlays in the current buffer that contain position POS. |
1981 | Return the number found, and store them in a vector in *VEC_PTR. | |
1982 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1983 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1984 | or ZV if there are no more overlays. | |
bbbe9545 | 1985 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
239c932b RS |
1986 | or BEGV if there are no previous overlays. |
1987 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1988 | |
1989 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1990 | when this function is called. |
1991 | ||
1992 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1993 | If EXTEND is zero, we never extend the vector, | |
1994 | and we store only as many overlays as will fit. | |
1995 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1996 | |
1997 | int | |
239c932b | 1998 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1999 | int pos; |
61d54cd5 | 2000 | int extend; |
2eec3b4e RS |
2001 | Lisp_Object **vec_ptr; |
2002 | int *len_ptr; | |
2003 | int *next_ptr; | |
239c932b | 2004 | int *prev_ptr; |
1ab256cb | 2005 | { |
2eec3b4e RS |
2006 | Lisp_Object tail, overlay, start, end, result; |
2007 | int idx = 0; | |
2008 | int len = *len_ptr; | |
2009 | Lisp_Object *vec = *vec_ptr; | |
2010 | int next = ZV; | |
239c932b | 2011 | int prev = BEGV; |
61d54cd5 RS |
2012 | int inhibit_storing = 0; |
2013 | ||
2eec3b4e | 2014 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2015 | GC_CONSP (tail); |
2eec3b4e RS |
2016 | tail = XCONS (tail)->cdr) |
2017 | { | |
239c932b | 2018 | int startpos, endpos; |
52f8ec73 | 2019 | |
2eec3b4e | 2020 | overlay = XCONS (tail)->car; |
1ab256cb | 2021 | |
2eec3b4e RS |
2022 | start = OVERLAY_START (overlay); |
2023 | end = OVERLAY_END (overlay); | |
239c932b RS |
2024 | endpos = OVERLAY_POSITION (end); |
2025 | if (endpos < pos) | |
2026 | { | |
2027 | if (prev < endpos) | |
2028 | prev = endpos; | |
2029 | break; | |
2030 | } | |
2031 | if (endpos == pos) | |
2032 | continue; | |
2eec3b4e RS |
2033 | startpos = OVERLAY_POSITION (start); |
2034 | if (startpos <= pos) | |
2035 | { | |
2036 | if (idx == len) | |
2037 | { | |
61d54cd5 RS |
2038 | /* The supplied vector is full. |
2039 | Either make it bigger, or don't store any more in it. */ | |
2040 | if (extend) | |
2041 | { | |
0552666b GM |
2042 | /* Make it work with an initial len == 0. */ |
2043 | len *= 2; | |
2044 | if (len == 0) | |
2045 | len = 4; | |
2046 | *len_ptr = len; | |
61d54cd5 RS |
2047 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2048 | *vec_ptr = vec; | |
2049 | } | |
2050 | else | |
2051 | inhibit_storing = 1; | |
2eec3b4e | 2052 | } |
61d54cd5 RS |
2053 | |
2054 | if (!inhibit_storing) | |
2055 | vec[idx] = overlay; | |
2056 | /* Keep counting overlays even if we can't return them all. */ | |
2057 | idx++; | |
2eec3b4e RS |
2058 | } |
2059 | else if (startpos < next) | |
2060 | next = startpos; | |
2061 | } | |
2062 | ||
2063 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2064 | GC_CONSP (tail); |
2eec3b4e | 2065 | tail = XCONS (tail)->cdr) |
1ab256cb | 2066 | { |
239c932b | 2067 | int startpos, endpos; |
52f8ec73 | 2068 | |
2eec3b4e | 2069 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
2070 | |
2071 | start = OVERLAY_START (overlay); | |
2072 | end = OVERLAY_END (overlay); | |
2073 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2074 | if (pos < startpos) |
2eec3b4e RS |
2075 | { |
2076 | if (startpos < next) | |
2077 | next = startpos; | |
2078 | break; | |
2079 | } | |
239c932b RS |
2080 | endpos = OVERLAY_POSITION (end); |
2081 | if (pos < endpos) | |
2eec3b4e RS |
2082 | { |
2083 | if (idx == len) | |
2084 | { | |
61d54cd5 RS |
2085 | if (extend) |
2086 | { | |
2087 | *len_ptr = len *= 2; | |
0552666b GM |
2088 | if (len == 0) |
2089 | len = *len_ptr = 4; | |
61d54cd5 RS |
2090 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2091 | *vec_ptr = vec; | |
2092 | } | |
2093 | else | |
2094 | inhibit_storing = 1; | |
2eec3b4e | 2095 | } |
61d54cd5 RS |
2096 | |
2097 | if (!inhibit_storing) | |
2098 | vec[idx] = overlay; | |
2099 | idx++; | |
2eec3b4e | 2100 | } |
239c932b RS |
2101 | else if (endpos < pos && endpos > prev) |
2102 | prev = endpos; | |
1ab256cb RM |
2103 | } |
2104 | ||
239c932b RS |
2105 | if (next_ptr) |
2106 | *next_ptr = next; | |
2107 | if (prev_ptr) | |
2108 | *prev_ptr = prev; | |
2eec3b4e RS |
2109 | return idx; |
2110 | } | |
74514898 RS |
2111 | \f |
2112 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2113 | or are empty at BEG. |
2114 | ||
74514898 RS |
2115 | Return the number found, and store them in a vector in *VEC_PTR. |
2116 | Store in *LEN_PTR the size allocated for the vector. | |
2117 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2118 | or ZV if there are no more overlays. | |
2119 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2120 | or BEGV if there are no previous overlays. | |
2121 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2122 | ||
2123 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2124 | when this function is called. | |
2125 | ||
2126 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2127 | If EXTEND is zero, we never extend the vector, | |
2128 | and we store only as many overlays as will fit. | |
2129 | But we still return the total number of overlays. */ | |
2130 | ||
2131 | int | |
2132 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2133 | int beg, end; | |
2134 | int extend; | |
2135 | Lisp_Object **vec_ptr; | |
2136 | int *len_ptr; | |
2137 | int *next_ptr; | |
2138 | int *prev_ptr; | |
2139 | { | |
2140 | Lisp_Object tail, overlay, ostart, oend, result; | |
2141 | int idx = 0; | |
2142 | int len = *len_ptr; | |
2143 | Lisp_Object *vec = *vec_ptr; | |
2144 | int next = ZV; | |
2145 | int prev = BEGV; | |
2146 | int inhibit_storing = 0; | |
2147 | ||
2148 | for (tail = current_buffer->overlays_before; | |
2149 | GC_CONSP (tail); | |
2150 | tail = XCONS (tail)->cdr) | |
2151 | { | |
2152 | int startpos, endpos; | |
2153 | ||
2154 | overlay = XCONS (tail)->car; | |
2155 | ||
2156 | ostart = OVERLAY_START (overlay); | |
2157 | oend = OVERLAY_END (overlay); | |
2158 | endpos = OVERLAY_POSITION (oend); | |
2159 | if (endpos < beg) | |
2160 | { | |
2161 | if (prev < endpos) | |
2162 | prev = endpos; | |
2163 | break; | |
2164 | } | |
2165 | startpos = OVERLAY_POSITION (ostart); | |
2166 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2167 | or is empty at the start of the range. */ |
74514898 | 2168 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2169 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2170 | { |
2171 | if (idx == len) | |
2172 | { | |
2173 | /* The supplied vector is full. | |
2174 | Either make it bigger, or don't store any more in it. */ | |
2175 | if (extend) | |
2176 | { | |
2177 | *len_ptr = len *= 2; | |
2178 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2179 | *vec_ptr = vec; | |
2180 | } | |
2181 | else | |
2182 | inhibit_storing = 1; | |
2183 | } | |
2184 | ||
2185 | if (!inhibit_storing) | |
2186 | vec[idx] = overlay; | |
2187 | /* Keep counting overlays even if we can't return them all. */ | |
2188 | idx++; | |
2189 | } | |
2190 | else if (startpos < next) | |
2191 | next = startpos; | |
2192 | } | |
2193 | ||
2194 | for (tail = current_buffer->overlays_after; | |
2195 | GC_CONSP (tail); | |
2196 | tail = XCONS (tail)->cdr) | |
2197 | { | |
2198 | int startpos, endpos; | |
2199 | ||
2200 | overlay = XCONS (tail)->car; | |
2201 | ||
2202 | ostart = OVERLAY_START (overlay); | |
2203 | oend = OVERLAY_END (overlay); | |
2204 | startpos = OVERLAY_POSITION (ostart); | |
2205 | if (end < startpos) | |
2206 | { | |
2207 | if (startpos < next) | |
2208 | next = startpos; | |
2209 | break; | |
2210 | } | |
2211 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2212 | /* Count an interval if it either overlaps the range |
2213 | or is empty at the start of the range. */ | |
74514898 | 2214 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2215 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2216 | { |
2217 | if (idx == len) | |
2218 | { | |
2219 | if (extend) | |
2220 | { | |
2221 | *len_ptr = len *= 2; | |
2222 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2223 | *vec_ptr = vec; | |
2224 | } | |
2225 | else | |
2226 | inhibit_storing = 1; | |
2227 | } | |
2228 | ||
2229 | if (!inhibit_storing) | |
2230 | vec[idx] = overlay; | |
2231 | idx++; | |
2232 | } | |
2233 | else if (endpos < beg && endpos > prev) | |
2234 | prev = endpos; | |
2235 | } | |
fc04fa47 | 2236 | |
74514898 RS |
2237 | if (next_ptr) |
2238 | *next_ptr = next; | |
2239 | if (prev_ptr) | |
2240 | *prev_ptr = prev; | |
2241 | return idx; | |
2242 | } | |
2243 | \f | |
fc04fa47 KH |
2244 | /* Fast function to just test if we're at an overlay boundary. */ |
2245 | int | |
2246 | overlay_touches_p (pos) | |
2247 | int pos; | |
2248 | { | |
2249 | Lisp_Object tail, overlay; | |
2250 | ||
2251 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
2252 | tail = XCONS (tail)->cdr) | |
2253 | { | |
2254 | int endpos; | |
2255 | ||
2256 | overlay = XCONS (tail)->car; | |
2257 | if (!GC_OVERLAYP (overlay)) | |
2258 | abort (); | |
2259 | ||
2260 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2261 | if (endpos < pos) | |
2262 | break; | |
2263 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2264 | return 1; | |
2265 | } | |
2266 | ||
2267 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
2268 | tail = XCONS (tail)->cdr) | |
2269 | { | |
2270 | int startpos; | |
2271 | ||
2272 | overlay = XCONS (tail)->car; | |
2273 | if (!GC_OVERLAYP (overlay)) | |
2274 | abort (); | |
2275 | ||
2276 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2277 | if (pos < startpos) | |
2278 | break; | |
2279 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2280 | return 1; | |
2281 | } | |
2282 | return 0; | |
2283 | } | |
2eec3b4e | 2284 | \f |
5985d248 KH |
2285 | struct sortvec |
2286 | { | |
2287 | Lisp_Object overlay; | |
2288 | int beg, end; | |
2289 | int priority; | |
2290 | }; | |
2291 | ||
2292 | static int | |
dfcf069d AS |
2293 | compare_overlays (v1, v2) |
2294 | const void *v1, *v2; | |
5985d248 | 2295 | { |
dfcf069d AS |
2296 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2297 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2298 | if (s1->priority != s2->priority) |
2299 | return s1->priority - s2->priority; | |
2300 | if (s1->beg != s2->beg) | |
2301 | return s1->beg - s2->beg; | |
2302 | if (s1->end != s2->end) | |
2303 | return s2->end - s1->end; | |
2304 | return 0; | |
2305 | } | |
2306 | ||
2307 | /* Sort an array of overlays by priority. The array is modified in place. | |
2308 | The return value is the new size; this may be smaller than the original | |
2309 | size if some of the overlays were invalid or were window-specific. */ | |
2310 | int | |
2311 | sort_overlays (overlay_vec, noverlays, w) | |
2312 | Lisp_Object *overlay_vec; | |
2313 | int noverlays; | |
2314 | struct window *w; | |
2315 | { | |
2316 | int i, j; | |
2317 | struct sortvec *sortvec; | |
2318 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2319 | ||
2320 | /* Put the valid and relevant overlays into sortvec. */ | |
2321 | ||
2322 | for (i = 0, j = 0; i < noverlays; i++) | |
2323 | { | |
0fa767e7 | 2324 | Lisp_Object tem; |
c99fc30f | 2325 | Lisp_Object overlay; |
5985d248 | 2326 | |
c99fc30f | 2327 | overlay = overlay_vec[i]; |
5985d248 KH |
2328 | if (OVERLAY_VALID (overlay) |
2329 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2330 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2331 | { | |
0fa767e7 KH |
2332 | /* If we're interested in a specific window, then ignore |
2333 | overlays that are limited to some other window. */ | |
2334 | if (w) | |
5985d248 | 2335 | { |
0fa767e7 KH |
2336 | Lisp_Object window; |
2337 | ||
2338 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2339 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2340 | continue; |
5985d248 | 2341 | } |
0fa767e7 KH |
2342 | |
2343 | /* This overlay is good and counts: put it into sortvec. */ | |
2344 | sortvec[j].overlay = overlay; | |
2345 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2346 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2347 | tem = Foverlay_get (overlay, Qpriority); | |
2348 | if (INTEGERP (tem)) | |
2349 | sortvec[j].priority = XINT (tem); | |
2350 | else | |
2351 | sortvec[j].priority = 0; | |
2352 | j++; | |
5985d248 KH |
2353 | } |
2354 | } | |
2355 | noverlays = j; | |
2356 | ||
2357 | /* Sort the overlays into the proper order: increasing priority. */ | |
2358 | ||
2359 | if (noverlays > 1) | |
2360 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2361 | ||
2362 | for (i = 0; i < noverlays; i++) | |
2363 | overlay_vec[i] = sortvec[i].overlay; | |
2364 | return (noverlays); | |
2365 | } | |
2366 | \f | |
bbbe9545 KH |
2367 | struct sortstr |
2368 | { | |
cb26008f | 2369 | Lisp_Object string, string2; |
bbbe9545 KH |
2370 | int size; |
2371 | int priority; | |
2372 | }; | |
2373 | ||
e8185fa8 KH |
2374 | struct sortstrlist |
2375 | { | |
2376 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2377 | int size; /* Allocated length of that array. */ | |
2378 | int used; /* How much of the array is currently in use. */ | |
2379 | int bytes; /* Total length of the strings in buf. */ | |
2380 | }; | |
2381 | ||
2382 | /* Buffers for storing information about the overlays touching a given | |
2383 | position. These could be automatic variables in overlay_strings, but | |
2384 | it's more efficient to hold onto the memory instead of repeatedly | |
2385 | allocating and freeing it. */ | |
2386 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2387 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2388 | |
2389 | /* Allocated length of overlay_str_buf. */ | |
2390 | static int overlay_str_len; | |
2391 | ||
bbbe9545 KH |
2392 | /* A comparison function suitable for passing to qsort. */ |
2393 | static int | |
2394 | cmp_for_strings (as1, as2) | |
2395 | char *as1, *as2; | |
2396 | { | |
2397 | struct sortstr *s1 = (struct sortstr *)as1; | |
2398 | struct sortstr *s2 = (struct sortstr *)as2; | |
2399 | if (s1->size != s2->size) | |
2400 | return s2->size - s1->size; | |
2401 | if (s1->priority != s2->priority) | |
2402 | return s1->priority - s2->priority; | |
2403 | return 0; | |
2404 | } | |
2405 | ||
e8185fa8 | 2406 | static void |
cb26008f | 2407 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2408 | struct sortstrlist *ssl; |
cb26008f | 2409 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2410 | int size; |
2411 | { | |
43d27a72 RS |
2412 | int nbytes; |
2413 | ||
e8185fa8 KH |
2414 | if (ssl->used == ssl->size) |
2415 | { | |
2416 | if (ssl->buf) | |
2417 | ssl->size *= 2; | |
2418 | else | |
2419 | ssl->size = 5; | |
2420 | ssl->buf = ((struct sortstr *) | |
2421 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2422 | } | |
2423 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2424 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2425 | ssl->buf[ssl->used].size = size; |
2426 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2427 | ssl->used++; | |
43d27a72 RS |
2428 | |
2429 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2430 | nbytes = XSTRING (str)->size; | |
2431 | else if (! STRING_MULTIBYTE (str)) | |
2432 | nbytes = count_size_as_multibyte (XSTRING (str)->data, | |
fc932ac6 | 2433 | STRING_BYTES (XSTRING (str))); |
43d27a72 | 2434 | else |
fc932ac6 | 2435 | nbytes = STRING_BYTES (XSTRING (str)); |
43d27a72 RS |
2436 | |
2437 | ssl->bytes += nbytes; | |
2438 | ||
cb26008f | 2439 | if (STRINGP (str2)) |
43d27a72 RS |
2440 | { |
2441 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2442 | nbytes = XSTRING (str2)->size; | |
2443 | else if (! STRING_MULTIBYTE (str2)) | |
2444 | nbytes = count_size_as_multibyte (XSTRING (str2)->data, | |
fc932ac6 | 2445 | STRING_BYTES (XSTRING (str2))); |
43d27a72 | 2446 | else |
fc932ac6 | 2447 | nbytes = STRING_BYTES (XSTRING (str2)); |
43d27a72 RS |
2448 | |
2449 | ssl->bytes += nbytes; | |
2450 | } | |
e8185fa8 | 2451 | } |
bbbe9545 KH |
2452 | |
2453 | /* Return the concatenation of the strings associated with overlays that | |
2454 | begin or end at POS, ignoring overlays that are specific to a window | |
2455 | other than W. The strings are concatenated in the appropriate order: | |
2456 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2457 | lower. Normally all of the after-strings come first, but zero-sized |
2458 | overlays have their after-strings ride along with the before-strings | |
2459 | because it would look strange to print them inside-out. | |
2460 | ||
2461 | Returns the string length, and stores the contents indirectly through | |
2462 | PSTR, if that variable is non-null. The string may be overwritten by | |
2463 | subsequent calls. */ | |
6b5d3b89 | 2464 | |
bbbe9545 KH |
2465 | int |
2466 | overlay_strings (pos, w, pstr) | |
2467 | int pos; | |
2468 | struct window *w; | |
6b5d3b89 | 2469 | unsigned char **pstr; |
bbbe9545 | 2470 | { |
e8185fa8 | 2471 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2472 | int startpos, endpos; |
43d27a72 | 2473 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2474 | |
e8185fa8 KH |
2475 | overlay_heads.used = overlay_heads.bytes = 0; |
2476 | overlay_tails.used = overlay_tails.bytes = 0; | |
bbbe9545 KH |
2477 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
2478 | { | |
2479 | overlay = XCONS (ov)->car; | |
2480 | if (!OVERLAYP (overlay)) | |
2481 | abort (); | |
2482 | ||
2483 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2484 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2485 | if (endpos < pos) | |
2486 | break; | |
2487 | if (endpos != pos && startpos != pos) | |
2488 | continue; | |
2489 | window = Foverlay_get (overlay, Qwindow); | |
2490 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2491 | continue; | |
e8185fa8 KH |
2492 | if (startpos == pos |
2493 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2494 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2495 | (startpos == endpos |
2496 | ? Foverlay_get (overlay, Qafter_string) | |
2497 | : Qnil), | |
2498 | Foverlay_get (overlay, Qpriority), | |
2499 | endpos - startpos); | |
2500 | else if (endpos == pos | |
2501 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2502 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2503 | Foverlay_get (overlay, Qpriority), |
2504 | endpos - startpos); | |
bbbe9545 KH |
2505 | } |
2506 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) | |
2507 | { | |
2508 | overlay = XCONS (ov)->car; | |
2509 | if (!OVERLAYP (overlay)) | |
2510 | abort (); | |
2511 | ||
2512 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2513 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2514 | if (startpos > pos) | |
2515 | break; | |
e8185fa8 KH |
2516 | if (endpos != pos && startpos != pos) |
2517 | continue; | |
2518 | window = Foverlay_get (overlay, Qwindow); | |
2519 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2520 | continue; | |
e8185fa8 KH |
2521 | if (startpos == pos |
2522 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2523 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2524 | (startpos == endpos |
2525 | ? Foverlay_get (overlay, Qafter_string) | |
2526 | : Qnil), | |
2527 | Foverlay_get (overlay, Qpriority), | |
2528 | endpos - startpos); | |
2529 | else if (endpos == pos | |
2530 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2531 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2532 | Foverlay_get (overlay, Qpriority), |
2533 | endpos - startpos); | |
bbbe9545 | 2534 | } |
e8185fa8 KH |
2535 | if (overlay_tails.used > 1) |
2536 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2537 | cmp_for_strings); | |
2538 | if (overlay_heads.used > 1) | |
2539 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2540 | cmp_for_strings); | |
2541 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2542 | { |
e8185fa8 | 2543 | Lisp_Object tem; |
bbbe9545 | 2544 | int i; |
9f4d7cde | 2545 | unsigned char *p; |
e8185fa8 | 2546 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2547 | |
2548 | if (total > overlay_str_len) | |
9f4d7cde RS |
2549 | { |
2550 | overlay_str_len = total; | |
2551 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
2552 | total); | |
2553 | } | |
bbbe9545 | 2554 | p = overlay_str_buf; |
e8185fa8 | 2555 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2556 | { |
43d27a72 | 2557 | int nbytes; |
e8185fa8 | 2558 | tem = overlay_tails.buf[i].string; |
fc932ac6 RS |
2559 | nbytes = copy_text (XSTRING (tem)->data, p, |
2560 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2561 | STRING_MULTIBYTE (tem), multibyte); |
2562 | p += nbytes; | |
bbbe9545 | 2563 | } |
e8185fa8 | 2564 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2565 | { |
43d27a72 | 2566 | int nbytes; |
e8185fa8 | 2567 | tem = overlay_heads.buf[i].string; |
fc932ac6 RS |
2568 | nbytes = copy_text (XSTRING (tem)->data, p, |
2569 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2570 | STRING_MULTIBYTE (tem), multibyte); |
2571 | p += nbytes; | |
cb26008f KH |
2572 | tem = overlay_heads.buf[i].string2; |
2573 | if (STRINGP (tem)) | |
2574 | { | |
43d27a72 | 2575 | nbytes = copy_text (XSTRING (tem)->data, p, |
fc932ac6 | 2576 | STRING_BYTES (XSTRING (tem)), |
43d27a72 RS |
2577 | STRING_MULTIBYTE (tem), multibyte); |
2578 | p += nbytes; | |
cb26008f | 2579 | } |
bbbe9545 | 2580 | } |
cb26008f KH |
2581 | if (p != overlay_str_buf + total) |
2582 | abort (); | |
bbbe9545 KH |
2583 | if (pstr) |
2584 | *pstr = overlay_str_buf; | |
e8185fa8 | 2585 | return total; |
bbbe9545 | 2586 | } |
e8185fa8 | 2587 | return 0; |
bbbe9545 KH |
2588 | } |
2589 | \f | |
5c4f68f1 | 2590 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2591 | |
2eec3b4e | 2592 | void |
5c4f68f1 JB |
2593 | recenter_overlay_lists (buf, pos) |
2594 | struct buffer *buf; | |
2eec3b4e RS |
2595 | int pos; |
2596 | { | |
2597 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2598 | ||
2599 | /* See if anything in overlays_before should move to overlays_after. */ | |
2600 | ||
2601 | /* We don't strictly need prev in this loop; it should always be nil. | |
2602 | But we use it for symmetry and in case that should cease to be true | |
2603 | with some future change. */ | |
2604 | prev = Qnil; | |
5c4f68f1 | 2605 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2606 | CONSP (tail); |
2607 | prev = tail, tail = next) | |
1ab256cb | 2608 | { |
2eec3b4e RS |
2609 | next = XCONS (tail)->cdr; |
2610 | overlay = XCONS (tail)->car; | |
2611 | ||
2612 | /* If the overlay is not valid, get rid of it. */ | |
2613 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2614 | #if 1 |
2615 | abort (); | |
2616 | #else | |
2eec3b4e RS |
2617 | { |
2618 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2619 | if (!NILP (prev)) | |
2620 | XCONS (prev)->cdr = next; | |
2621 | else | |
5c4f68f1 | 2622 | buf->overlays_before = next; |
2eec3b4e RS |
2623 | tail = prev; |
2624 | continue; | |
2625 | } | |
52f8ec73 | 2626 | #endif |
1ab256cb | 2627 | |
2eec3b4e RS |
2628 | beg = OVERLAY_START (overlay); |
2629 | end = OVERLAY_END (overlay); | |
1ab256cb | 2630 | |
2eec3b4e | 2631 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2632 | { |
2eec3b4e RS |
2633 | /* OVERLAY needs to be moved. */ |
2634 | int where = OVERLAY_POSITION (beg); | |
2635 | Lisp_Object other, other_prev; | |
2636 | ||
2637 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2638 | if (!NILP (prev)) | |
2639 | XCONS (prev)->cdr = next; | |
2640 | else | |
5c4f68f1 | 2641 | buf->overlays_before = next; |
2eec3b4e RS |
2642 | |
2643 | /* Search thru overlays_after for where to put it. */ | |
2644 | other_prev = Qnil; | |
5c4f68f1 | 2645 | for (other = buf->overlays_after; |
2eec3b4e RS |
2646 | CONSP (other); |
2647 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 2648 | { |
2eec3b4e RS |
2649 | Lisp_Object otherbeg, otheroverlay, follower; |
2650 | int win; | |
2651 | ||
2652 | otheroverlay = XCONS (other)->car; | |
2653 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2654 | abort (); |
2eec3b4e RS |
2655 | |
2656 | otherbeg = OVERLAY_START (otheroverlay); | |
2657 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2658 | break; | |
1ab256cb | 2659 | } |
2eec3b4e RS |
2660 | |
2661 | /* Add TAIL to overlays_after before OTHER. */ | |
2662 | XCONS (tail)->cdr = other; | |
2663 | if (!NILP (other_prev)) | |
2664 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 2665 | else |
5c4f68f1 | 2666 | buf->overlays_after = tail; |
2eec3b4e | 2667 | tail = prev; |
1ab256cb | 2668 | } |
2eec3b4e RS |
2669 | else |
2670 | /* We've reached the things that should stay in overlays_before. | |
2671 | All the rest of overlays_before must end even earlier, | |
2672 | so stop now. */ | |
2673 | break; | |
2674 | } | |
2675 | ||
2676 | /* See if anything in overlays_after should be in overlays_before. */ | |
2677 | prev = Qnil; | |
5c4f68f1 | 2678 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2679 | CONSP (tail); |
2680 | prev = tail, tail = next) | |
2681 | { | |
2682 | next = XCONS (tail)->cdr; | |
2683 | overlay = XCONS (tail)->car; | |
2684 | ||
2685 | /* If the overlay is not valid, get rid of it. */ | |
2686 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2687 | #if 1 |
2688 | abort (); | |
2689 | #else | |
2eec3b4e RS |
2690 | { |
2691 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2692 | if (!NILP (prev)) | |
2693 | XCONS (prev)->cdr = next; | |
2694 | else | |
5c4f68f1 | 2695 | buf->overlays_after = next; |
2eec3b4e RS |
2696 | tail = prev; |
2697 | continue; | |
2698 | } | |
52f8ec73 | 2699 | #endif |
2eec3b4e RS |
2700 | |
2701 | beg = OVERLAY_START (overlay); | |
2702 | end = OVERLAY_END (overlay); | |
2703 | ||
2704 | /* Stop looking, when we know that nothing further | |
2705 | can possibly end before POS. */ | |
2706 | if (OVERLAY_POSITION (beg) > pos) | |
2707 | break; | |
2708 | ||
2709 | if (OVERLAY_POSITION (end) <= pos) | |
2710 | { | |
2711 | /* OVERLAY needs to be moved. */ | |
2712 | int where = OVERLAY_POSITION (end); | |
2713 | Lisp_Object other, other_prev; | |
2714 | ||
2715 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2716 | if (!NILP (prev)) | |
2717 | XCONS (prev)->cdr = next; | |
2718 | else | |
5c4f68f1 | 2719 | buf->overlays_after = next; |
2eec3b4e RS |
2720 | |
2721 | /* Search thru overlays_before for where to put it. */ | |
2722 | other_prev = Qnil; | |
5c4f68f1 | 2723 | for (other = buf->overlays_before; |
2eec3b4e RS |
2724 | CONSP (other); |
2725 | other_prev = other, other = XCONS (other)->cdr) | |
2726 | { | |
2727 | Lisp_Object otherend, otheroverlay; | |
2728 | int win; | |
2729 | ||
2730 | otheroverlay = XCONS (other)->car; | |
2731 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2732 | abort (); |
2eec3b4e RS |
2733 | |
2734 | otherend = OVERLAY_END (otheroverlay); | |
2735 | if (OVERLAY_POSITION (otherend) <= where) | |
2736 | break; | |
2737 | } | |
2738 | ||
2739 | /* Add TAIL to overlays_before before OTHER. */ | |
2740 | XCONS (tail)->cdr = other; | |
2741 | if (!NILP (other_prev)) | |
2742 | XCONS (other_prev)->cdr = tail; | |
2743 | else | |
5c4f68f1 | 2744 | buf->overlays_before = tail; |
2eec3b4e RS |
2745 | tail = prev; |
2746 | } | |
2747 | } | |
2748 | ||
8d7a4592 | 2749 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 2750 | } |
2b1bdf65 | 2751 | |
423cdb46 KH |
2752 | void |
2753 | adjust_overlays_for_insert (pos, length) | |
2754 | int pos; | |
2755 | int length; | |
2756 | { | |
2757 | /* After an insertion, the lists are still sorted properly, | |
2758 | but we may need to update the value of the overlay center. */ | |
2759 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
2760 | XSETFASTINT (current_buffer->overlay_center, | |
2761 | XFASTINT (current_buffer->overlay_center) + length); | |
2762 | } | |
2763 | ||
2764 | void | |
2765 | adjust_overlays_for_delete (pos, length) | |
2766 | int pos; | |
2767 | int length; | |
2768 | { | |
2769 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
2770 | /* The deletion was to our right. No change needed; the before- and | |
2771 | after-lists are still consistent. */ | |
2772 | ; | |
2773 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
2774 | /* The deletion was to our left. We need to adjust the center value | |
2775 | to account for the change in position, but the lists are consistent | |
2776 | given the new value. */ | |
2777 | XSETFASTINT (current_buffer->overlay_center, | |
2778 | XFASTINT (current_buffer->overlay_center) - length); | |
2779 | else | |
2780 | /* We're right in the middle. There might be things on the after-list | |
2781 | that now belong on the before-list. Recentering will move them, | |
2782 | and also update the center point. */ | |
2783 | recenter_overlay_lists (current_buffer, pos); | |
2784 | } | |
2785 | ||
2b1bdf65 KH |
2786 | /* Fix up overlays that were garbled as a result of permuting markers |
2787 | in the range START through END. Any overlay with at least one | |
2788 | endpoint in this range will need to be unlinked from the overlay | |
2789 | list and reinserted in its proper place. | |
2790 | Such an overlay might even have negative size at this point. | |
2791 | If so, we'll reverse the endpoints. Can you think of anything | |
2792 | better to do in this situation? */ | |
2793 | void | |
2794 | fix_overlays_in_range (start, end) | |
2795 | register int start, end; | |
2796 | { | |
2797 | Lisp_Object tem, overlay; | |
2798 | Lisp_Object before_list, after_list; | |
2799 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2800 | int startpos, endpos; | |
2801 | ||
2802 | /* This algorithm shifts links around instead of consing and GCing. | |
2803 | The loop invariant is that before_list (resp. after_list) is a | |
2804 | well-formed list except that its last element, the one that | |
2805 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2806 | So it's not a bug that before_list isn't initialized, although | |
2807 | it may look strange. */ | |
2808 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2809 | { | |
2810 | overlay = XCONS (*ptail)->car; | |
2811 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2812 | if (endpos < start) | |
2813 | break; | |
2814 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2815 | if (endpos < end | |
2816 | || (startpos >= start && startpos < end)) | |
2817 | { | |
2818 | /* If the overlay is backwards, fix that now. */ | |
2819 | if (startpos > endpos) | |
2820 | { | |
2821 | int tem; | |
2c99f3ea RS |
2822 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
2823 | Qnil); | |
2824 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
2825 | Qnil); | |
2b1bdf65 KH |
2826 | tem = startpos; startpos = endpos; endpos = tem; |
2827 | } | |
2828 | /* Add it to the end of the wrong list. Later on, | |
2829 | recenter_overlay_lists will move it to the right place. */ | |
2830 | if (endpos < XINT (current_buffer->overlay_center)) | |
2831 | { | |
2832 | *pafter = *ptail; | |
2833 | pafter = &XCONS (*ptail)->cdr; | |
2834 | } | |
2835 | else | |
2836 | { | |
2837 | *pbefore = *ptail; | |
2838 | pbefore = &XCONS (*ptail)->cdr; | |
2839 | } | |
2840 | *ptail = XCONS (*ptail)->cdr; | |
2841 | } | |
2842 | else | |
2843 | ptail = &XCONS (*ptail)->cdr; | |
2844 | } | |
2845 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2846 | { | |
2847 | overlay = XCONS (*ptail)->car; | |
2848 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2849 | if (startpos >= end) | |
2850 | break; | |
2851 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2852 | if (startpos >= start | |
2853 | || (endpos >= start && endpos < end)) | |
2854 | { | |
2855 | if (startpos > endpos) | |
2856 | { | |
2857 | int tem; | |
2c99f3ea RS |
2858 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
2859 | Qnil); | |
2860 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
2861 | Qnil); | |
2b1bdf65 KH |
2862 | tem = startpos; startpos = endpos; endpos = tem; |
2863 | } | |
2864 | if (endpos < XINT (current_buffer->overlay_center)) | |
2865 | { | |
2866 | *pafter = *ptail; | |
2867 | pafter = &XCONS (*ptail)->cdr; | |
2868 | } | |
2869 | else | |
2870 | { | |
2871 | *pbefore = *ptail; | |
2872 | pbefore = &XCONS (*ptail)->cdr; | |
2873 | } | |
2874 | *ptail = XCONS (*ptail)->cdr; | |
2875 | } | |
2876 | else | |
2877 | ptail = &XCONS (*ptail)->cdr; | |
2878 | } | |
2879 | ||
2880 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2881 | and let the recenter function make it sane again. */ | |
2882 | *pbefore = current_buffer->overlays_before; | |
2883 | current_buffer->overlays_before = before_list; | |
2884 | recenter_overlay_lists (current_buffer, | |
2885 | XINT (current_buffer->overlay_center)); | |
2886 | ||
2887 | *pafter = current_buffer->overlays_after; | |
2888 | current_buffer->overlays_after = after_list; | |
2889 | recenter_overlay_lists (current_buffer, | |
2890 | XINT (current_buffer->overlay_center)); | |
2891 | } | |
3b06f880 KH |
2892 | |
2893 | /* We have two types of overlay: the one whose ending marker is | |
2894 | after-insertion-marker (this is the usual case) and the one whose | |
2895 | ending marker is before-insertion-marker. When `overlays_before' | |
2896 | contains overlays of the latter type and the former type in this | |
2897 | order and both overlays end at inserting position, inserting a text | |
2898 | increases only the ending marker of the latter type, which results | |
2899 | in incorrect ordering of `overlays_before'. | |
2900 | ||
2901 | This function fixes ordering of overlays in the slot | |
2902 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
2903 | was at PREV, and now is at POS. */ | |
2904 | ||
01136e9b | 2905 | void |
3b06f880 KH |
2906 | fix_overlays_before (bp, prev, pos) |
2907 | struct buffer *bp; | |
2908 | int prev, pos; | |
2909 | { | |
2910 | Lisp_Object *tailp = &bp->overlays_before; | |
2911 | Lisp_Object *right_place; | |
2912 | int end; | |
2913 | ||
2914 | /* After the insertion, the several overlays may be in incorrect | |
2915 | order. The possibility is that, in the list `overlays_before', | |
2916 | an overlay which ends at POS appears after an overlay which ends | |
2917 | at PREV. Since POS is greater than PREV, we must fix the | |
2918 | ordering of these overlays, by moving overlays ends at POS before | |
2919 | the overlays ends at PREV. */ | |
2920 | ||
2921 | /* At first, find a place where disordered overlays should be linked | |
2922 | in. It is where an overlay which end before POS exists. (i.e. an | |
2923 | overlay whose ending marker is after-insertion-marker if disorder | |
2924 | exists). */ | |
2925 | while (!NILP (*tailp) | |
2926 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car))) | |
2927 | >= pos)) | |
2928 | tailp = &XCONS (*tailp)->cdr; | |
2929 | ||
2930 | /* If we don't find such an overlay, | |
2931 | or the found one ends before PREV, | |
2932 | or the found one is the last one in the list, | |
2933 | we don't have to fix anything. */ | |
2934 | if (NILP (*tailp) | |
2935 | || end < prev | |
2936 | || NILP (XCONS (*tailp)->cdr)) | |
2937 | return; | |
2938 | ||
2939 | right_place = tailp; | |
2940 | tailp = &XCONS (*tailp)->cdr; | |
2941 | ||
2942 | /* Now, end position of overlays in the list *TAILP should be before | |
2943 | or equal to PREV. In the loop, an overlay which ends at POS is | |
2944 | moved ahead to the place pointed by RIGHT_PLACE. If we found an | |
2945 | overlay which ends before PREV, the remaining overlays are in | |
2946 | correct order. */ | |
2947 | while (!NILP (*tailp)) | |
2948 | { | |
2949 | end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car)); | |
2950 | ||
2951 | if (end == pos) | |
2952 | { /* This overlay is disordered. */ | |
2953 | Lisp_Object found = *tailp; | |
2954 | ||
2955 | /* Unlink the found overlay. */ | |
2956 | *tailp = XCONS (found)->cdr; | |
2957 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ | |
2958 | XCONS (found)->cdr = *right_place; | |
2959 | /* Link it into the right place. */ | |
2960 | *right_place = found; | |
2961 | } | |
2962 | else if (end == prev) | |
2963 | tailp = &XCONS (*tailp)->cdr; | |
2964 | else /* No more disordered overlay. */ | |
2965 | break; | |
2966 | } | |
2967 | } | |
2eec3b4e | 2968 | \f |
52f8ec73 JB |
2969 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
2970 | "Return t if OBJECT is an overlay.") | |
2971 | (object) | |
2972 | Lisp_Object object; | |
2973 | { | |
2974 | return (OVERLAYP (object) ? Qt : Qnil); | |
2975 | } | |
2976 | ||
acac2700 | 2977 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
2978 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
2979 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
2980 | BEG and END may be integers or markers.\n\ |
2981 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
2982 | front delimiter advance when text is inserted there.\n\ | |
2983 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
2984 | rear delimiter advance when text is inserted there.") | |
2985 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 2986 | Lisp_Object beg, end, buffer; |
acac2700 | 2987 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
2988 | { |
2989 | Lisp_Object overlay; | |
5c4f68f1 | 2990 | struct buffer *b; |
2eec3b4e | 2991 | |
5c4f68f1 | 2992 | if (NILP (buffer)) |
67180c6a | 2993 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
2994 | else |
2995 | CHECK_BUFFER (buffer, 2); | |
2996 | if (MARKERP (beg) | |
2997 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2998 | error ("Marker points into wrong buffer"); | |
2999 | if (MARKERP (end) | |
3000 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3001 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3002 | |
883047b9 JB |
3003 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3004 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 3005 | |
883047b9 | 3006 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3007 | { |
c99fc30f KH |
3008 | Lisp_Object temp; |
3009 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3010 | } |
883047b9 JB |
3011 | |
3012 | b = XBUFFER (buffer); | |
3013 | ||
3014 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3015 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3016 | |
acac2700 RS |
3017 | if (!NILP (front_advance)) |
3018 | XMARKER (beg)->insertion_type = 1; | |
3019 | if (!NILP (rear_advance)) | |
3020 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3021 | |
48e2e3ba | 3022 | overlay = allocate_misc (); |
89ca3e1b | 3023 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3024 | XOVERLAY (overlay)->start = beg; |
3025 | XOVERLAY (overlay)->end = end; | |
3026 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3027 | |
3028 | /* Put the new overlay on the wrong list. */ | |
3029 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3030 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3031 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3032 | else |
5c4f68f1 | 3033 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3034 | |
3035 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3036 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3037 | |
b61982dd JB |
3038 | /* We don't need to redisplay the region covered by the overlay, because |
3039 | the overlay has no properties at the moment. */ | |
3040 | ||
2eec3b4e RS |
3041 | return overlay; |
3042 | } | |
876aa27c RS |
3043 | \f |
3044 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3045 | ||
3046 | static void | |
3047 | modify_overlay (buf, start, end) | |
3048 | struct buffer *buf; | |
3049 | int start, end; | |
3050 | { | |
3051 | if (start == end) | |
3052 | return; | |
3053 | ||
3054 | if (start > end) | |
3055 | { | |
3056 | int temp = start; | |
3057 | start = end; end = temp; | |
3058 | } | |
3059 | ||
3060 | /* If this is a buffer not in the selected window, | |
3061 | we must do other windows. */ | |
3062 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3063 | windows_or_buffers_changed = 1; | |
3064 | /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */ | |
3065 | else if (buf != current_buffer) | |
3066 | windows_or_buffers_changed = 1; | |
3067 | /* If multiple windows show this buffer, we must do other windows. */ | |
3068 | else if (buffer_shared > 1) | |
3069 | windows_or_buffers_changed = 1; | |
3070 | else | |
3071 | { | |
3072 | if (unchanged_modified == MODIFF | |
3073 | && overlay_unchanged_modified == OVERLAY_MODIFF) | |
3074 | { | |
3075 | beg_unchanged = start - BEG; | |
3076 | end_unchanged = Z - end; | |
3077 | } | |
3078 | else | |
3079 | { | |
3080 | if (Z - end < end_unchanged) | |
3081 | end_unchanged = Z - end; | |
3082 | if (start - BEG < beg_unchanged) | |
3083 | beg_unchanged = start - BEG; | |
3084 | } | |
3085 | } | |
3086 | ||
d8b9150f | 3087 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3088 | } |
2eec3b4e | 3089 | |
876aa27c | 3090 | \f\f |
2e34157c RS |
3091 | Lisp_Object Fdelete_overlay (); |
3092 | ||
5c4f68f1 JB |
3093 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
3094 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
3095 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
3096 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
3097 | buffer.") | |
5c4f68f1 JB |
3098 | (overlay, beg, end, buffer) |
3099 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 3100 | { |
0a4469c9 RS |
3101 | struct buffer *b, *ob; |
3102 | Lisp_Object obuffer; | |
3103 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 3104 | |
52f8ec73 | 3105 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
3106 | if (NILP (buffer)) |
3107 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3108 | if (NILP (buffer)) |
67180c6a | 3109 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 3110 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
3111 | |
3112 | if (MARKERP (beg) | |
3113 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3114 | error ("Marker points into wrong buffer"); | |
3115 | if (MARKERP (end) | |
3116 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3117 | error ("Marker points into wrong buffer"); | |
3118 | ||
b61982dd JB |
3119 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3120 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3121 | ||
9d7608b7 KH |
3122 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3123 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3124 | |
b61982dd JB |
3125 | if (XINT (beg) > XINT (end)) |
3126 | { | |
c99fc30f KH |
3127 | Lisp_Object temp; |
3128 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3129 | } |
3130 | ||
9d7608b7 KH |
3131 | specbind (Qinhibit_quit, Qt); |
3132 | ||
0a4469c9 | 3133 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3134 | b = XBUFFER (buffer); |
0a4469c9 | 3135 | ob = XBUFFER (obuffer); |
2eec3b4e | 3136 | |
c82ed728 | 3137 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3138 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3139 | { |
3140 | /* Redisplay where the overlay was. */ | |
3141 | if (!NILP (obuffer)) | |
3142 | { | |
2e34157c RS |
3143 | int o_beg; |
3144 | int o_end; | |
50760c4a | 3145 | |
80509f2f RS |
3146 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3147 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3148 | |
2e34157c | 3149 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3150 | } |
3151 | ||
3152 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3153 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3154 | } |
c82ed728 JB |
3155 | else |
3156 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3157 | { | |
2e34157c | 3158 | int o_beg, o_end; |
c82ed728 JB |
3159 | int change_beg, change_end; |
3160 | ||
80509f2f RS |
3161 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3162 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3163 | |
2e34157c RS |
3164 | if (o_beg == XINT (beg)) |
3165 | modify_overlay (b, o_end, XINT (end)); | |
3166 | else if (o_end == XINT (end)) | |
3167 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3168 | else |
3169 | { | |
2e34157c RS |
3170 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3171 | if (XINT (end) > o_end) o_end = XINT (end); | |
3172 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3173 | } |
3174 | } | |
b61982dd | 3175 | |
0a4469c9 RS |
3176 | if (!NILP (obuffer)) |
3177 | { | |
3178 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3179 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3180 | } | |
5c4f68f1 JB |
3181 | |
3182 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3183 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3184 | |
3185 | /* Put the overlay on the wrong list. */ | |
3186 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3187 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3188 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3189 | else |
5c4f68f1 | 3190 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3191 | |
3192 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3193 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3194 | |
0a4469c9 | 3195 | return unbind_to (count, overlay); |
2eec3b4e RS |
3196 | } |
3197 | ||
3198 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 3199 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 3200 | (overlay) |
5c4f68f1 | 3201 | Lisp_Object overlay; |
2eec3b4e | 3202 | { |
0a4469c9 | 3203 | Lisp_Object buffer; |
5c4f68f1 | 3204 | struct buffer *b; |
0a4469c9 | 3205 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 3206 | |
52f8ec73 JB |
3207 | CHECK_OVERLAY (overlay, 0); |
3208 | ||
0a4469c9 RS |
3209 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3210 | if (NILP (buffer)) | |
3211 | return Qnil; | |
3212 | ||
3213 | b = XBUFFER (buffer); | |
3214 | ||
3215 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
3216 | |
3217 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
3218 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
3219 | ||
876aa27c | 3220 | modify_overlay (b, |
8231a9aa RS |
3221 | marker_position (OVERLAY_START (overlay)), |
3222 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 3223 | |
3ece337a JB |
3224 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3225 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3226 | ||
0a4469c9 | 3227 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3228 | } |
3229 | \f | |
8ebafa8d JB |
3230 | /* Overlay dissection functions. */ |
3231 | ||
3232 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
3233 | "Return the position at which OVERLAY starts.") | |
3234 | (overlay) | |
3235 | Lisp_Object overlay; | |
3236 | { | |
3237 | CHECK_OVERLAY (overlay, 0); | |
3238 | ||
3239 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3240 | } | |
3241 | ||
3242 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
3243 | "Return the position at which OVERLAY ends.") | |
3244 | (overlay) | |
3245 | Lisp_Object overlay; | |
3246 | { | |
3247 | CHECK_OVERLAY (overlay, 0); | |
3248 | ||
3249 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3250 | } | |
3251 | ||
3252 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
3253 | "Return the buffer OVERLAY belongs to.") | |
3254 | (overlay) | |
3255 | Lisp_Object overlay; | |
3256 | { | |
3257 | CHECK_OVERLAY (overlay, 0); | |
3258 | ||
3259 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3260 | } | |
3261 | ||
3262 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
3263 | "Return a list of the properties on OVERLAY.\n\ | |
3264 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
3265 | OVERLAY.") | |
3266 | (overlay) | |
3267 | Lisp_Object overlay; | |
3268 | { | |
3269 | CHECK_OVERLAY (overlay, 0); | |
3270 | ||
48e2e3ba | 3271 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3272 | } |
3273 | ||
3274 | \f | |
2eec3b4e | 3275 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 3276 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
3277 | (pos) |
3278 | Lisp_Object pos; | |
3279 | { | |
3280 | int noverlays; | |
2eec3b4e RS |
3281 | Lisp_Object *overlay_vec; |
3282 | int len; | |
3283 | Lisp_Object result; | |
3284 | ||
3285 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3286 | ||
3287 | len = 10; | |
3288 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3289 | ||
3290 | /* Put all the overlays we want in a vector in overlay_vec. | |
3291 | Store the length in len. */ | |
2a77a7d7 RS |
3292 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3293 | (int *) 0, (int *) 0); | |
2eec3b4e RS |
3294 | |
3295 | /* Make a list of them all. */ | |
3296 | result = Flist (noverlays, overlay_vec); | |
3297 | ||
9ac0d9e0 | 3298 | xfree (overlay_vec); |
2eec3b4e RS |
3299 | return result; |
3300 | } | |
3301 | ||
74514898 | 3302 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
3303 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
3304 | Overlap means that at least one character is contained within the overlay\n\ | |
3305 | and also contained within the specified region.\n\ | |
3306 | Empty overlays are included in the result if they are located at BEG\n\ | |
3307 | or between BEG and END.") | |
74514898 RS |
3308 | (beg, end) |
3309 | Lisp_Object beg, end; | |
3310 | { | |
3311 | int noverlays; | |
3312 | Lisp_Object *overlay_vec; | |
3313 | int len; | |
3314 | Lisp_Object result; | |
3315 | ||
3316 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
3317 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
3318 | ||
3319 | len = 10; | |
3320 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3321 | ||
3322 | /* Put all the overlays we want in a vector in overlay_vec. | |
3323 | Store the length in len. */ | |
3324 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3325 | (int *) 0, (int *) 0); | |
3326 | ||
3327 | /* Make a list of them all. */ | |
3328 | result = Flist (noverlays, overlay_vec); | |
3329 | ||
3330 | xfree (overlay_vec); | |
3331 | return result; | |
3332 | } | |
3333 | ||
2eec3b4e RS |
3334 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
3335 | 1, 1, 0, | |
bbe20e81 KH |
3336 | "Return the next position after POS where an overlay starts or ends.\n\ |
3337 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
3338 | (pos) |
3339 | Lisp_Object pos; | |
3340 | { | |
3341 | int noverlays; | |
3342 | int endpos; | |
3343 | Lisp_Object *overlay_vec; | |
3344 | int len; | |
2eec3b4e RS |
3345 | int i; |
3346 | ||
3347 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3348 | ||
3349 | len = 10; | |
3350 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3351 | ||
3352 | /* Put all the overlays we want in a vector in overlay_vec. | |
3353 | Store the length in len. | |
3354 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 RS |
3355 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3356 | &endpos, (int *) 0); | |
2eec3b4e RS |
3357 | |
3358 | /* If any of these overlays ends before endpos, | |
3359 | use its ending point instead. */ | |
3360 | for (i = 0; i < noverlays; i++) | |
3361 | { | |
3362 | Lisp_Object oend; | |
3363 | int oendpos; | |
3364 | ||
3365 | oend = OVERLAY_END (overlay_vec[i]); | |
3366 | oendpos = OVERLAY_POSITION (oend); | |
3367 | if (oendpos < endpos) | |
3368 | endpos = oendpos; | |
1ab256cb RM |
3369 | } |
3370 | ||
9ac0d9e0 | 3371 | xfree (overlay_vec); |
2eec3b4e RS |
3372 | return make_number (endpos); |
3373 | } | |
239c932b RS |
3374 | |
3375 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3376 | Sprevious_overlay_change, 1, 1, 0, | |
3377 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 3378 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
3379 | (pos) |
3380 | Lisp_Object pos; | |
3381 | { | |
3382 | int noverlays; | |
3383 | int prevpos; | |
3384 | Lisp_Object *overlay_vec; | |
3385 | int len; | |
3386 | int i; | |
624bbdc4 | 3387 | Lisp_Object tail; |
239c932b RS |
3388 | |
3389 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3390 | ||
3391 | len = 10; | |
3392 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3393 | ||
624bbdc4 RS |
3394 | /* At beginning of buffer, we know the answer; |
3395 | avoid bug subtracting 1 below. */ | |
3396 | if (XINT (pos) == BEGV) | |
3397 | return pos; | |
3398 | ||
239c932b RS |
3399 | /* Put all the overlays we want in a vector in overlay_vec. |
3400 | Store the length in len. | |
3401 | prevpos gets the position of an overlay end. */ | |
2a77a7d7 RS |
3402 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3403 | (int *) 0, &prevpos); | |
239c932b | 3404 | |
624bbdc4 | 3405 | /* If any of these overlays starts after prevpos, |
239c932b RS |
3406 | maybe use its starting point instead. */ |
3407 | for (i = 0; i < noverlays; i++) | |
3408 | { | |
3409 | Lisp_Object ostart; | |
3410 | int ostartpos; | |
3411 | ||
3412 | ostart = OVERLAY_START (overlay_vec[i]); | |
3413 | ostartpos = OVERLAY_POSITION (ostart); | |
3414 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
3415 | prevpos = ostartpos; | |
3416 | } | |
3417 | ||
624bbdc4 RS |
3418 | /* If any overlay ends at pos, consider its starting point too. */ |
3419 | for (tail = current_buffer->overlays_before; | |
3420 | GC_CONSP (tail); | |
3421 | tail = XCONS (tail)->cdr) | |
3422 | { | |
3423 | Lisp_Object overlay, ostart; | |
3424 | int ostartpos; | |
3425 | ||
3426 | overlay = XCONS (tail)->car; | |
3427 | ||
3428 | ostart = OVERLAY_START (overlay); | |
3429 | ostartpos = OVERLAY_POSITION (ostart); | |
3430 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
3431 | prevpos = ostartpos; | |
3432 | } | |
3433 | ||
239c932b RS |
3434 | xfree (overlay_vec); |
3435 | return make_number (prevpos); | |
3436 | } | |
2eec3b4e RS |
3437 | \f |
3438 | /* These functions are for debugging overlays. */ | |
3439 | ||
3440 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
3441 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
3442 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 3443 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
3444 | Recentering overlays moves overlays between these lists.\n\ |
3445 | The lists you get are copies, so that changing them has no effect.\n\ | |
3446 | However, the overlays you get are the real objects that the buffer uses.") | |
3447 | () | |
3448 | { | |
3449 | Lisp_Object before, after; | |
3450 | before = current_buffer->overlays_before; | |
3451 | if (CONSP (before)) | |
3452 | before = Fcopy_sequence (before); | |
3453 | after = current_buffer->overlays_after; | |
3454 | if (CONSP (after)) | |
3455 | after = Fcopy_sequence (after); | |
3456 | ||
3457 | return Fcons (before, after); | |
3458 | } | |
3459 | ||
3460 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3461 | "Recenter the overlays of the current buffer around position POS.") | |
3462 | (pos) | |
3463 | Lisp_Object pos; | |
3464 | { | |
3465 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3466 | ||
5c4f68f1 | 3467 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3468 | return Qnil; |
3469 | } | |
3470 | \f | |
3471 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3472 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3473 | (overlay, prop) |
3474 | Lisp_Object overlay, prop; | |
3475 | { | |
cab4777e | 3476 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3477 | |
3478 | CHECK_OVERLAY (overlay, 0); | |
3479 | ||
cab4777e RS |
3480 | fallback = Qnil; |
3481 | ||
48e2e3ba | 3482 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3483 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
3484 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
3485 | { | |
3486 | if (EQ (XCONS (plist)->car, prop)) | |
3487 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
3488 | else if (EQ (XCONS (plist)->car, Qcategory)) |
3489 | { | |
3490 | Lisp_Object tem; | |
3491 | tem = Fcar (Fcdr (plist)); | |
3492 | if (SYMBOLP (tem)) | |
3493 | fallback = Fget (tem, prop); | |
3494 | } | |
2eec3b4e | 3495 | } |
52f8ec73 | 3496 | |
cab4777e | 3497 | return fallback; |
2eec3b4e RS |
3498 | } |
3499 | ||
3500 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3501 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3502 | (overlay, prop, value) | |
3503 | Lisp_Object overlay, prop, value; | |
3504 | { | |
48e2e3ba | 3505 | Lisp_Object tail, buffer; |
9d7608b7 | 3506 | int changed; |
2eec3b4e | 3507 | |
52f8ec73 | 3508 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3509 | |
274a9425 RS |
3510 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3511 | ||
48e2e3ba | 3512 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3513 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
3514 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
3515 | if (EQ (XCONS (tail)->car, prop)) |
3516 | { | |
9d7608b7 KH |
3517 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
3518 | XCONS (XCONS (tail)->cdr)->car = value; | |
3519 | goto found; | |
274a9425 | 3520 | } |
9d7608b7 KH |
3521 | /* It wasn't in the list, so add it to the front. */ |
3522 | changed = !NILP (value); | |
48e2e3ba KH |
3523 | XOVERLAY (overlay)->plist |
3524 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3525 | found: |
3526 | if (! NILP (buffer)) | |
3527 | { | |
3528 | if (changed) | |
876aa27c | 3529 | modify_overlay (XBUFFER (buffer), |
9d7608b7 KH |
3530 | marker_position (OVERLAY_START (overlay)), |
3531 | marker_position (OVERLAY_END (overlay))); | |
3532 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3533 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3534 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3535 | Fdelete_overlay (overlay); | |
3536 | } | |
2eec3b4e | 3537 | return value; |
1ab256cb RM |
3538 | } |
3539 | \f | |
9115729e KH |
3540 | /* Subroutine of report_overlay_modification. */ |
3541 | ||
3542 | /* Lisp vector holding overlay hook functions to call. | |
3543 | Vector elements come in pairs. | |
3544 | Each even-index element is a list of hook functions. | |
3545 | The following odd-index element is the overlay they came from. | |
3546 | ||
3547 | Before the buffer change, we fill in this vector | |
3548 | as we call overlay hook functions. | |
3549 | After the buffer change, we get the functions to call from this vector. | |
3550 | This way we always call the same functions before and after the change. */ | |
3551 | static Lisp_Object last_overlay_modification_hooks; | |
3552 | ||
3553 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3554 | static int last_overlay_modification_hooks_used; | |
3555 | ||
3556 | /* Add one functionlist/overlay pair | |
3557 | to the end of last_overlay_modification_hooks. */ | |
3558 | ||
3559 | static void | |
3560 | add_overlay_mod_hooklist (functionlist, overlay) | |
3561 | Lisp_Object functionlist, overlay; | |
3562 | { | |
3563 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3564 | ||
3565 | if (last_overlay_modification_hooks_used == oldsize) | |
3566 | { | |
3567 | Lisp_Object old; | |
3568 | old = last_overlay_modification_hooks; | |
3569 | last_overlay_modification_hooks | |
3570 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3571 | bcopy (XVECTOR (old)->contents, |
3572 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3573 | sizeof (Lisp_Object) * oldsize); |
3574 | } | |
3575 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3576 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3577 | } | |
3578 | \f | |
173f2a64 RS |
3579 | /* Run the modification-hooks of overlays that include |
3580 | any part of the text in START to END. | |
9115729e KH |
3581 | If this change is an insertion, also |
3582 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3583 | and the insert-after-hooks of overlay ending at START. |
3584 | ||
3585 | This is called both before and after the modification. | |
3586 | AFTER is nonzero when we call after the modification. | |
3587 | ||
9115729e KH |
3588 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3589 | When AFTER is nonzero, they are the start position, | |
3590 | the position after the inserted new text, | |
3591 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3592 | |
3593 | void | |
930a9140 | 3594 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3595 | Lisp_Object start, end; |
930a9140 RS |
3596 | int after; |
3597 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3598 | { |
3599 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3600 | /* 1 if this change is an insertion. */ |
3601 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3602 | int tail_copied; |
930a9140 | 3603 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3604 | |
3605 | overlay = Qnil; | |
3606 | tail = Qnil; | |
930a9140 | 3607 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3608 | |
9115729e KH |
3609 | if (after) |
3610 | { | |
3611 | /* Call the functions recorded in last_overlay_modification_hooks | |
3612 | rather than scanning the overlays again. | |
3613 | First copy the vector contents, in case some of these hooks | |
3614 | do subsequent modification of the buffer. */ | |
3615 | int size = last_overlay_modification_hooks_used; | |
3616 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3617 | int i; | |
3618 | ||
3619 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3620 | copy, size * sizeof (Lisp_Object)); | |
3621 | gcpro1.var = copy; | |
3622 | gcpro1.nvars = size; | |
3623 | ||
3624 | for (i = 0; i < size;) | |
3625 | { | |
3626 | Lisp_Object prop, overlay; | |
3627 | prop = copy[i++]; | |
3628 | overlay = copy[i++]; | |
3629 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3630 | } | |
3631 | UNGCPRO; | |
3632 | return; | |
3633 | } | |
3634 | ||
3635 | /* We are being called before a change. | |
3636 | Scan the overlays to find the functions to call. */ | |
3637 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3638 | tail_copied = 0; |
173f2a64 RS |
3639 | for (tail = current_buffer->overlays_before; |
3640 | CONSP (tail); | |
3641 | tail = XCONS (tail)->cdr) | |
3642 | { | |
3643 | int startpos, endpos; | |
be8b1c6b | 3644 | Lisp_Object ostart, oend; |
173f2a64 RS |
3645 | |
3646 | overlay = XCONS (tail)->car; | |
3647 | ||
3648 | ostart = OVERLAY_START (overlay); | |
3649 | oend = OVERLAY_END (overlay); | |
3650 | endpos = OVERLAY_POSITION (oend); | |
3651 | if (XFASTINT (start) > endpos) | |
3652 | break; | |
3653 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3654 | if (insertion && (XFASTINT (start) == startpos |
3655 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3656 | { |
3657 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3658 | if (!NILP (prop)) |
3659 | { | |
3660 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3661 | if (!tail_copied) |
3662 | tail = Fcopy_sequence (tail); | |
3663 | tail_copied = 1; | |
930a9140 | 3664 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3665 | } |
173f2a64 | 3666 | } |
9115729e KH |
3667 | if (insertion && (XFASTINT (start) == endpos |
3668 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3669 | { |
3670 | prop = Foverlay_get (overlay, Qinsert_behind_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 | 3678 | } |
3bd13e92 KH |
3679 | /* Test for intersecting intervals. This does the right thing |
3680 | for both insertion and deletion. */ | |
3681 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3682 | { |
3683 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3684 | if (!NILP (prop)) |
3685 | { | |
55b48893 RS |
3686 | if (!tail_copied) |
3687 | tail = Fcopy_sequence (tail); | |
3688 | tail_copied = 1; | |
930a9140 | 3689 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3690 | } |
173f2a64 RS |
3691 | } |
3692 | } | |
3693 | ||
55b48893 | 3694 | tail_copied = 0; |
173f2a64 RS |
3695 | for (tail = current_buffer->overlays_after; |
3696 | CONSP (tail); | |
3697 | tail = XCONS (tail)->cdr) | |
3698 | { | |
3699 | int startpos, endpos; | |
be8b1c6b | 3700 | Lisp_Object ostart, oend; |
173f2a64 RS |
3701 | |
3702 | overlay = XCONS (tail)->car; | |
3703 | ||
3704 | ostart = OVERLAY_START (overlay); | |
3705 | oend = OVERLAY_END (overlay); | |
3706 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3707 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3708 | if (XFASTINT (end) < startpos) |
3709 | break; | |
9115729e KH |
3710 | if (insertion && (XFASTINT (start) == startpos |
3711 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3712 | { |
3713 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3714 | if (!NILP (prop)) |
3715 | { | |
55b48893 RS |
3716 | if (!tail_copied) |
3717 | tail = Fcopy_sequence (tail); | |
3718 | tail_copied = 1; | |
930a9140 | 3719 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3720 | } |
173f2a64 | 3721 | } |
9115729e KH |
3722 | if (insertion && (XFASTINT (start) == endpos |
3723 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3724 | { |
3725 | prop = Foverlay_get (overlay, Qinsert_behind_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 | 3733 | } |
3bd13e92 KH |
3734 | /* Test for intersecting intervals. This does the right thing |
3735 | for both insertion and deletion. */ | |
3736 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3737 | { |
3738 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3739 | if (!NILP (prop)) |
3740 | { | |
55b48893 RS |
3741 | if (!tail_copied) |
3742 | tail = Fcopy_sequence (tail); | |
3743 | tail_copied = 1; | |
930a9140 | 3744 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3745 | } |
173f2a64 RS |
3746 | } |
3747 | } | |
55b48893 RS |
3748 | |
3749 | UNGCPRO; | |
173f2a64 RS |
3750 | } |
3751 | ||
3752 | static void | |
930a9140 RS |
3753 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3754 | Lisp_Object list, overlay; | |
3755 | int after; | |
3756 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3757 | { |
930a9140 | 3758 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3759 | |
930a9140 | 3760 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3761 | if (! after) |
3762 | add_overlay_mod_hooklist (list, overlay); | |
3763 | ||
173f2a64 RS |
3764 | while (!NILP (list)) |
3765 | { | |
930a9140 RS |
3766 | if (NILP (arg3)) |
3767 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3768 | else | |
3769 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3770 | list = Fcdr (list); |
3771 | } | |
3772 | UNGCPRO; | |
3773 | } | |
9d7608b7 KH |
3774 | |
3775 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3776 | property is set. */ | |
3777 | void | |
3778 | evaporate_overlays (pos) | |
3779 | int pos; | |
3780 | { | |
3781 | Lisp_Object tail, overlay, hit_list; | |
3782 | ||
3783 | hit_list = Qnil; | |
3784 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
3785 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
3786 | tail = XCONS (tail)->cdr) | |
3787 | { | |
3788 | int endpos; | |
3789 | overlay = XCONS (tail)->car; | |
3790 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3791 | if (endpos < pos) | |
3792 | break; | |
3793 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 3794 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3795 | hit_list = Fcons (overlay, hit_list); |
3796 | } | |
3797 | else | |
3798 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
3799 | tail = XCONS (tail)->cdr) | |
3800 | { | |
3801 | int startpos; | |
889bf329 | 3802 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
3803 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3804 | if (startpos > pos) | |
3805 | break; | |
3806 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 3807 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3808 | hit_list = Fcons (overlay, hit_list); |
3809 | } | |
3810 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
3811 | Fdelete_overlay (XCONS (hit_list)->car); | |
3812 | } | |
173f2a64 | 3813 | \f |
54dfdeb0 | 3814 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
3815 | in the slot with offset OFFSET. */ |
3816 | ||
0fa3ba92 | 3817 | void |
54dfdeb0 KH |
3818 | buffer_slot_type_mismatch (offset) |
3819 | int offset; | |
0fa3ba92 | 3820 | { |
54dfdeb0 | 3821 | Lisp_Object sym; |
0fa3ba92 | 3822 | char *type_name; |
54dfdeb0 | 3823 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
3824 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
3825 | { | |
3826 | case Lisp_Int: type_name = "integers"; break; | |
3827 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 3828 | case Lisp_Symbol: type_name = "symbols"; break; |
1bf08baf | 3829 | |
0fa3ba92 JB |
3830 | default: |
3831 | abort (); | |
3832 | } | |
3833 | ||
1bf08baf | 3834 | error ("Only %s should be stored in the buffer-local variable %s", |
54dfdeb0 | 3835 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
3836 | } |
3837 | \f | |
dfcf069d | 3838 | void |
1ab256cb RM |
3839 | init_buffer_once () |
3840 | { | |
3841 | register Lisp_Object tem; | |
3842 | ||
13de9290 RS |
3843 | buffer_permanent_local_flags = 0; |
3844 | ||
1ab256cb RM |
3845 | /* Make sure all markable slots in buffer_defaults |
3846 | are initialized reasonably, so mark_buffer won't choke. */ | |
3847 | reset_buffer (&buffer_defaults); | |
13de9290 | 3848 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 3849 | reset_buffer (&buffer_local_symbols); |
13de9290 | 3850 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
3851 | /* Prevent GC from getting confused. */ |
3852 | buffer_defaults.text = &buffer_defaults.own_text; | |
3853 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
3854 | #ifdef USE_TEXT_PROPERTIES | |
3855 | BUF_INTERVALS (&buffer_defaults) = 0; | |
3856 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3857 | #endif | |
67180c6a KH |
3858 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3859 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
3860 | |
3861 | /* Set up the default values of various buffer slots. */ | |
3862 | /* Must do these before making the first buffer! */ | |
3863 | ||
3864 | /* real setup is done in loaddefs.el */ | |
3865 | buffer_defaults.mode_line_format = build_string ("%-"); | |
0552666b | 3866 | buffer_defaults.top_line_format = Qnil; |
1ab256cb RM |
3867 | buffer_defaults.abbrev_mode = Qnil; |
3868 | buffer_defaults.overwrite_mode = Qnil; | |
3869 | buffer_defaults.case_fold_search = Qt; | |
3870 | buffer_defaults.auto_fill_function = Qnil; | |
3871 | buffer_defaults.selective_display = Qnil; | |
3872 | #ifndef old | |
3873 | buffer_defaults.selective_display_ellipses = Qt; | |
3874 | #endif | |
3875 | buffer_defaults.abbrev_table = Qnil; | |
3876 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 3877 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 3878 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 3879 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
3880 | buffer_defaults.overlays_before = Qnil; |
3881 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 3882 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 3883 | |
8d7a4592 | 3884 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
3885 | buffer_defaults.truncate_lines = Qnil; |
3886 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 3887 | buffer_defaults.direction_reversed = Qnil; |
1ab256cb | 3888 | |
f7975d07 | 3889 | #ifdef DOS_NT |
0776cb1b | 3890 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 3891 | #endif |
a1a17b61 | 3892 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 3893 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
3894 | XSETFASTINT (buffer_defaults.fill_column, 70); |
3895 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 3896 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 3897 | buffer_defaults.file_truename = Qnil; |
7962a441 | 3898 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
3899 | buffer_defaults.indicate_empty_lines = Qnil; |
3900 | buffer_defaults.scroll_up_aggressively = Qnil; | |
3901 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 3902 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
3903 | |
3904 | /* Assign the local-flags to the slots that have default values. | |
3905 | The local flag is a bit that is used in the buffer | |
3906 | to say that it has its own local value for the slot. | |
3907 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
3908 | ||
3909 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 3910 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
3911 | |
3912 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
3913 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
3914 | XSETINT (buffer_local_flags.filename, -1); |
3915 | XSETINT (buffer_local_flags.directory, -1); | |
3916 | XSETINT (buffer_local_flags.backed_up, -1); | |
3917 | XSETINT (buffer_local_flags.save_length, -1); | |
3918 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
3919 | XSETINT (buffer_local_flags.read_only, -1); | |
3920 | XSETINT (buffer_local_flags.major_mode, -1); | |
3921 | XSETINT (buffer_local_flags.mode_name, -1); | |
3922 | XSETINT (buffer_local_flags.undo_list, -1); | |
3923 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 3924 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 3925 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 3926 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 3927 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 3928 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 3929 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 3930 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 KH |
3931 | |
3932 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
3933 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
3934 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
3935 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
3936 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
3937 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 3938 | #ifndef old |
8d7a4592 | 3939 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 3940 | #endif |
8d7a4592 KH |
3941 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
3942 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
3943 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
3944 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
3945 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
3946 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
3947 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
f7975d07 | 3948 | #ifdef DOS_NT |
8d7a4592 | 3949 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
13de9290 RS |
3950 | /* Make this one a permanent local. */ |
3951 | buffer_permanent_local_flags |= 0x4000; | |
54ad07d3 | 3952 | #endif |
2e716096 RS |
3953 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
3954 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); | |
3b06f880 KH |
3955 | XSETFASTINT (buffer_local_flags.category_table, 0x20000); |
3956 | XSETFASTINT (buffer_local_flags.direction_reversed, 0x40000); | |
1bf08baf | 3957 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, 0x80000); |
a1a17b61 KH |
3958 | /* Make this one a permanent local. */ |
3959 | buffer_permanent_local_flags |= 0x80000; | |
0552666b GM |
3960 | XSETFASTINT (buffer_local_flags.left_margin_width, 0x100000); |
3961 | XSETFASTINT (buffer_local_flags.right_margin_width, 0x200000); | |
3962 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, 0x400000); | |
3963 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, 0x800000); | |
3964 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, 0x1000000); | |
3965 | XSETFASTINT (buffer_local_flags.top_line_format, 0x2000000); | |
c71b5d9b | 3966 | |
1ab256cb RM |
3967 | Vbuffer_alist = Qnil; |
3968 | current_buffer = 0; | |
3969 | all_buffers = 0; | |
3970 | ||
3971 | QSFundamental = build_string ("Fundamental"); | |
3972 | ||
3973 | Qfundamental_mode = intern ("fundamental-mode"); | |
3974 | buffer_defaults.major_mode = Qfundamental_mode; | |
3975 | ||
3976 | Qmode_class = intern ("mode-class"); | |
3977 | ||
3978 | Qprotected_field = intern ("protected-field"); | |
3979 | ||
3980 | Qpermanent_local = intern ("permanent-local"); | |
3981 | ||
3982 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
3983 | ||
3984 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 3985 | |
1ab256cb RM |
3986 | /* super-magic invisible buffer */ |
3987 | Vbuffer_alist = Qnil; | |
3988 | ||
ffd56f97 | 3989 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
3990 | |
3991 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
3992 | } |
3993 | ||
dfcf069d | 3994 | void |
1ab256cb RM |
3995 | init_buffer () |
3996 | { | |
3997 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
3998 | char *pwd; |
3999 | struct stat dotstat, pwdstat; | |
136351b7 | 4000 | Lisp_Object temp; |
f7975d07 | 4001 | int rc; |
1ab256cb RM |
4002 | |
4003 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
3d871c85 RS |
4004 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
4005 | Fset_buffer_multibyte (Qnil); | |
2381d133 JB |
4006 | |
4007 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
4008 | when PWD is right, and may avoid a fatal error. */ | |
309f2a6e RS |
4009 | if ((pwd = getenv ("PWD")) != 0 |
4010 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
4011 | && stat (pwd, &pwdstat) == 0 |
4012 | && stat (".", &dotstat) == 0 | |
4013 | && dotstat.st_ino == pwdstat.st_ino | |
4014 | && dotstat.st_dev == pwdstat.st_dev | |
4015 | && strlen (pwd) < MAXPATHLEN) | |
4016 | strcpy (buf, pwd); | |
6335beb0 RS |
4017 | #ifdef HAVE_GETCWD |
4018 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 4019 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 4020 | #else |
2381d133 | 4021 | else if (getwd (buf) == 0) |
cf1e6391 | 4022 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 4023 | #endif |
1ab256cb RM |
4024 | |
4025 | #ifndef VMS | |
4026 | /* Maybe this should really use some standard subroutine | |
4027 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
4028 | rc = strlen (buf); |
4029 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
4030 | { | |
4031 | buf[rc] = DIRECTORY_SEP; | |
4032 | buf[rc + 1] = '\0'; | |
4033 | } | |
1ab256cb | 4034 | #endif /* not VMS */ |
0995fa35 | 4035 | |
1ab256cb | 4036 | current_buffer->directory = build_string (buf); |
136351b7 | 4037 | |
0995fa35 RS |
4038 | /* Add /: to the front of the name |
4039 | if it would otherwise be treated as magic. */ | |
4040 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
4041 | if (! NILP (temp) |
4042 | /* If the default dir is just /, TEMP is non-nil | |
4043 | because of the ange-ftp completion handler. | |
4044 | However, it is not necessary to turn / into /:/. | |
4045 | So avoid doing that. */ | |
4046 | && strcmp ("/", XSTRING (current_buffer->directory)->data)) | |
0995fa35 RS |
4047 | current_buffer->directory |
4048 | = concat2 (build_string ("/:"), current_buffer->directory); | |
4049 | ||
136351b7 RS |
4050 | temp = get_minibuffer (0); |
4051 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
4052 | } |
4053 | ||
4054 | /* initialize the buffer routines */ | |
dfcf069d | 4055 | void |
1ab256cb RM |
4056 | syms_of_buffer () |
4057 | { | |
188d4d11 RM |
4058 | extern Lisp_Object Qdisabled; |
4059 | ||
9115729e KH |
4060 | staticpro (&last_overlay_modification_hooks); |
4061 | last_overlay_modification_hooks | |
4062 | = Fmake_vector (make_number (10), Qnil); | |
4063 | ||
1ab256cb RM |
4064 | staticpro (&Vbuffer_defaults); |
4065 | staticpro (&Vbuffer_local_symbols); | |
4066 | staticpro (&Qfundamental_mode); | |
4067 | staticpro (&Qmode_class); | |
4068 | staticpro (&QSFundamental); | |
4069 | staticpro (&Vbuffer_alist); | |
4070 | staticpro (&Qprotected_field); | |
4071 | staticpro (&Qpermanent_local); | |
4072 | staticpro (&Qkill_buffer_hook); | |
22378665 | 4073 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 4074 | staticpro (&Qoverlayp); |
9d7608b7 KH |
4075 | Qevaporate = intern ("evaporate"); |
4076 | staticpro (&Qevaporate); | |
294d215f | 4077 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 4078 | staticpro (&Qmodification_hooks); |
294d215f | 4079 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 4080 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 4081 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 4082 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 4083 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 4084 | staticpro (&Qget_file_buffer); |
5985d248 KH |
4085 | Qpriority = intern ("priority"); |
4086 | staticpro (&Qpriority); | |
4087 | Qwindow = intern ("window"); | |
4088 | staticpro (&Qwindow); | |
bbbe9545 KH |
4089 | Qbefore_string = intern ("before-string"); |
4090 | staticpro (&Qbefore_string); | |
4091 | Qafter_string = intern ("after-string"); | |
4092 | staticpro (&Qafter_string); | |
22378665 RS |
4093 | Qfirst_change_hook = intern ("first-change-hook"); |
4094 | staticpro (&Qfirst_change_hook); | |
4095 | Qbefore_change_functions = intern ("before-change-functions"); | |
4096 | staticpro (&Qbefore_change_functions); | |
4097 | Qafter_change_functions = intern ("after-change-functions"); | |
4098 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
4099 | |
4100 | Fput (Qprotected_field, Qerror_conditions, | |
4101 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
4102 | Fput (Qprotected_field, Qerror_message, | |
4103 | build_string ("Attempt to modify a protected field")); | |
4104 | ||
4105 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
4106 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
4107 | ||
4108 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
4109 | &buffer_defaults.mode_line_format, | |
4110 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
4111 | This is the same as (default-value 'mode-line-format)."); | |
4112 | ||
0552666b GM |
4113 | DEFVAR_LISP_NOPRO ("default-top-line-format", |
4114 | &buffer_defaults.top_line_format, | |
4115 | "Default value of `top-line-format' for buffers that don't override it.\n\ | |
4116 | This is the same as (default-value 'top-line-format)."); | |
4117 | ||
1ab256cb RM |
4118 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
4119 | &buffer_defaults.abbrev_mode, | |
4120 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
4121 | This is the same as (default-value 'abbrev-mode)."); | |
4122 | ||
4123 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
4124 | &buffer_defaults.ctl_arrow, | |
4125 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
4126 | This is the same as (default-value 'ctl-arrow)."); | |
4127 | ||
3b06f880 KH |
4128 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
4129 | &buffer_defaults.direction_reversed, | |
4130 | "Default value of `direction_reversed' for buffers that do not override it.\n\ | |
4131 | This is the same as (default-value 'direction-reversed)."); | |
4132 | ||
a1a17b61 KH |
4133 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
4134 | &buffer_defaults.enable_multibyte_characters, | |
ed8300d9 | 4135 | "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ |
53fe786d | 4136 | This is the same as (default-value 'enable-multibyte-characters)."); |
a1a17b61 | 4137 | |
c71b5d9b KH |
4138 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
4139 | &buffer_defaults.buffer_file_coding_system, | |
4140 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ | |
53fe786d | 4141 | This is the same as (default-value 'buffer-file-coding-system)."); |
c71b5d9b | 4142 | |
1ab256cb RM |
4143 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
4144 | &buffer_defaults.truncate_lines, | |
4145 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
4146 | This is the same as (default-value 'truncate-lines)."); | |
4147 | ||
4148 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
4149 | &buffer_defaults.fill_column, | |
4150 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
4151 | This is the same as (default-value 'fill-column)."); | |
4152 | ||
4153 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
4154 | &buffer_defaults.left_margin, | |
4155 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
4156 | This is the same as (default-value 'left-margin)."); | |
4157 | ||
4158 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
4159 | &buffer_defaults.tab_width, | |
4160 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
4161 | This is the same as (default-value 'tab-width)."); | |
4162 | ||
4163 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
4164 | &buffer_defaults.case_fold_search, | |
4165 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
4166 | This is the same as (default-value 'case-fold-search)."); | |
4167 | ||
f7975d07 | 4168 | #ifdef DOS_NT |
54ad07d3 RS |
4169 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
4170 | &buffer_defaults.buffer_file_type, | |
4171 | "Default file type for buffers that do not override it.\n\ | |
4172 | This is the same as (default-value 'buffer-file-type).\n\ | |
4173 | The file type is nil for text, t for binary."); | |
4174 | #endif | |
4175 | ||
0552666b GM |
4176 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
4177 | &buffer_defaults.left_margin_width, | |
4178 | "Default value of `left-margin-width' for buffers that don't override it.\n\ | |
4179 | This is the same as (default-value 'left-margin-width)."); | |
4180 | ||
4181 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
4182 | &buffer_defaults.right_margin_width, | |
4183 | "Default value of `right_margin_width' for buffers that don't override it.\n\ | |
4184 | This is the same as (default-value 'right-margin-width)."); | |
4185 | ||
4186 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
4187 | &buffer_defaults.indicate_empty_lines, | |
4188 | "Default value of `indicate-empty-lines' for buffers that don't override it.\n\ | |
4189 | This is the same as (default-value 'indicate-empty-lines)."); | |
4190 | ||
4191 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
4192 | &buffer_defaults.scroll_up_aggressively, | |
4193 | "Default value of `scroll-up-aggressively' for buffers that\n\ | |
4194 | don't override it. This is the same as (default-value\n\ | |
4195 | 'scroll-up-aggressively)."); | |
4196 | ||
4197 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
4198 | &buffer_defaults.scroll_down_aggressively, | |
4199 | "Default value of `scroll-down-aggressively' for buffers that\n\ | |
4200 | don't override it. This is the same as (default-value\n\ | |
4201 | 'scroll-down-aggressively)."); | |
4202 | ||
4203 | DEFVAR_PER_BUFFER ("top-line-format", ¤t_buffer->top_line_format, | |
4204 | Qnil, | |
4205 | "Analogous to `mode-line-format', but for a mode line displayed\n\ | |
4206 | at the top of windows."); | |
4207 | ||
0fa3ba92 JB |
4208 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
4209 | Qnil, 0); | |
1ab256cb RM |
4210 | |
4211 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
4212 | But make-docfile finds it! | |
4213 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 4214 | Qnil, |
1ab256cb RM |
4215 | "Template for displaying mode line for current buffer.\n\ |
4216 | Each buffer has its own value of this variable.\n\ | |
0552666b GM |
4217 | Value may be nil, a string, a symbol or a list or cons cell.\n\ |
4218 | A value of nil means don't display a mode line.\n\ | |
1ab256cb RM |
4219 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
4220 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
4221 | in that the %-constructs below are not recognized.\n\ | |
4222 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
4223 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
4224 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
4225 | For a list whose car is a string or list, each element is processed\n\ | |
4226 | recursively and the results are effectively concatenated.\n\ | |
4227 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
4228 | and padded (if the number is positive) or truncated (if negative)\n\ | |
4229 | to the width specified by that number.\n\ | |
4230 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
4231 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
4232 | or when it is found in a cons-cell or a list)\n\ | |
4233 | %b -- print buffer name. %f -- print visited file name.\n\ | |
5d516f2d | 4234 | %F -- print frame name.\n\ |
c2ff34f7 RS |
4235 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
4236 | % means buffer is read-only and * means it is modified.\n\ | |
4237 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 4238 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 4239 | %c -- print the current column number (this makes editing slower).\n\ |
6a567ad8 RS |
4240 | To make the column number update correctly in all cases,\n\ |
4241 | `column-number-mode' must be non-nil.\n\ | |
dd24e6a6 | 4242 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 4243 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 4244 | or print Bottom or All.\n\ |
1ab256cb | 4245 | %n -- print Narrow if appropriate.\n\ |
b77087c5 | 4246 | %t -- print T if file is text, B if binary.\n\ |
1ab256cb RM |
4247 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
4248 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
4249 | Decimal digits after the % specify field width to which to pad."); | |
4250 | */ | |
4251 | ||
4252 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
4253 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
4254 | nil here means use current buffer's major mode."); | |
4255 | ||
4256 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 4257 | make_number (Lisp_Symbol), |
1ab256cb RM |
4258 | "Symbol for current buffer's major mode."); |
4259 | ||
4260 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 4261 | make_number (Lisp_String), |
1ab256cb RM |
4262 | "Pretty name of current buffer's major mode (a string)."); |
4263 | ||
0fa3ba92 | 4264 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
4265 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
4266 | Automatically becomes buffer-local when set in any fashion."); | |
4267 | ||
4268 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 4269 | Qnil, |
5ed62574 | 4270 | "*Non-nil if searches and matches should ignore case.\n\ |
1ab256cb RM |
4271 | Automatically becomes buffer-local when set in any fashion."); |
4272 | ||
4273 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 4274 | make_number (Lisp_Int), |
1ab256cb RM |
4275 | "*Column beyond which automatic line-wrapping should happen.\n\ |
4276 | Automatically becomes buffer-local when set in any fashion."); | |
4277 | ||
4278 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 4279 | make_number (Lisp_Int), |
1ab256cb RM |
4280 | "*Column for the default indent-line-function to indent to.\n\ |
4281 | Linefeed indents to this column in Fundamental mode.\n\ | |
4282 | Automatically becomes buffer-local when set in any fashion."); | |
4283 | ||
4284 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 4285 | make_number (Lisp_Int), |
1ab256cb RM |
4286 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
4287 | Automatically becomes buffer-local when set in any fashion."); | |
4288 | ||
0fa3ba92 | 4289 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb | 4290 | "*Non-nil means display control chars with uparrow.\n\ |
6a99d31d | 4291 | A value of nil means use backslash and octal digits.\n\ |
1ab256cb RM |
4292 | Automatically becomes buffer-local when set in any fashion.\n\ |
4293 | This variable does not apply to characters whose display is specified\n\ | |
4294 | in the current display table (if there is one)."); | |
4295 | ||
3b06f880 | 4296 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf KH |
4297 | ¤t_buffer->enable_multibyte_characters, |
4298 | make_number (-1), | |
36bb26f7 | 4299 | "Non-nil means the buffer contents are regarded as multi-byte characters.\n\ |
ed218f73 | 4300 | Otherwise they are regarded as unibyte. This affects the display,\n\ |
53fe786d RS |
4301 | file I/O and the behavior of various editing commands.\n\ |
4302 | \n\ | |
4303 | This variable is buffer-local but you cannot set it directly;\n\ | |
4304 | use the function `set-buffer-multibyte' to change a buffer's representation.\n\ | |
4305 | Changing its default value with `setq-default' is supported.\n\ | |
4306 | See also variable `default-enable-multibyte-characters' and Info node\n\ | |
4307 | `(elisp)Text Representations'."); | |
3b06f880 | 4308 | |
c71b5d9b KH |
4309 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4310 | ¤t_buffer->buffer_file_coding_system, Qnil, | |
4311 | "Coding system to be used for encoding the buffer contents on saving.\n\ | |
940daec1 RS |
4312 | This variable applies to saving the buffer, and also to `write-region'\n\ |
4313 | and other functions that use `write-region'.\n\ | |
4314 | It does not apply to sending output to subprocesses, however.\n\ | |
4315 | \n\ | |
4316 | If this is nil, the buffer is saved without any code conversion\n\ | |
4317 | unless some coding system is specified in `file-coding-system-alist'\n\ | |
c71b5d9b KH |
4318 | for the buffer file.\n\ |
4319 | \n\ | |
940daec1 RS |
4320 | The variable `coding-system-for-write', if non-nil, overrides this variable.\n\ |
4321 | \n\ | |
c71b5d9b KH |
4322 | This variable is never applied to a way of decoding\n\ |
4323 | a file while reading it."); | |
4324 | ||
3b06f880 KH |
4325 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
4326 | Qnil, | |
4327 | "*Non-nil means lines in the buffer are displayed right to left."); | |
4328 | ||
0fa3ba92 | 4329 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
4330 | "*Non-nil means do not display continuation lines;\n\ |
4331 | give each line of text one screen line.\n\ | |
4332 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4333 | \n\ | |
4334 | Note that this is overridden by the variable\n\ | |
4335 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 4336 | and this buffer is not full-frame width."); |
1ab256cb | 4337 | |
f7975d07 | 4338 | #ifdef DOS_NT |
54ad07d3 RS |
4339 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
4340 | Qnil, | |
006d3d34 RS |
4341 | "Non-nil if the visited file is a binary file.\n\ |
4342 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
4343 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 4344 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
4345 | #endif |
4346 | ||
1ab256cb | 4347 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 4348 | make_number (Lisp_String), |
1ab256cb RM |
4349 | "Name of default directory of current buffer. Should end with slash.\n\ |
4350 | Each buffer has its own value of this variable."); | |
4351 | ||
4352 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 4353 | Qnil, |
1ab256cb | 4354 | "Function called (if non-nil) to perform auto-fill.\n\ |
54158e68 | 4355 | It is called after self-inserting a space or newline.\n\ |
1ab256cb | 4356 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
4357 | NOTE: This variable is not a hook;\n\ |
4358 | its value may not be a list of functions."); | |
1ab256cb RM |
4359 | |
4360 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 4361 | make_number (Lisp_String), |
1ab256cb RM |
4362 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
4363 | Each buffer has its own value of this variable."); | |
4364 | ||
f6ed2e84 RS |
4365 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
4366 | make_number (Lisp_String), | |
bb4c204e | 4367 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
4368 | The truename of a file is calculated by `file-truename'\n\ |
4369 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
4370 | Each buffer has its own value of this variable."); |
4371 | ||
1ab256cb | 4372 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 4373 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 4374 | make_number (Lisp_String), |
1ab256cb RM |
4375 | "Name of file for auto-saving current buffer,\n\ |
4376 | or nil if buffer should not be auto-saved.\n\ | |
4377 | Each buffer has its own value of this variable."); | |
4378 | ||
0fa3ba92 | 4379 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
4380 | "Non-nil if this buffer is read-only.\n\ |
4381 | Each buffer has its own value of this variable."); | |
4382 | ||
0fa3ba92 | 4383 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
4384 | "Non-nil if this buffer's file has been backed up.\n\ |
4385 | Backing up is done before the first time the file is saved.\n\ | |
4386 | Each buffer has its own value of this variable."); | |
4387 | ||
4388 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 4389 | make_number (Lisp_Int), |
1ab256cb RM |
4390 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
4391 | 0 initially.\n\ | |
4392 | Each buffer has its own value of this variable."); | |
4393 | ||
4394 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 4395 | Qnil, |
1ab256cb RM |
4396 | "Non-nil enables selective display:\n\ |
4397 | Integer N as value means display only lines\n\ | |
4398 | that start with less than n columns of space.\n\ | |
4399 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
4400 | Then ^M's in the file are written into files as newlines.\n\n\ | |
4401 | Automatically becomes buffer-local when set in any fashion."); | |
4402 | ||
4403 | #ifndef old | |
4404 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4405 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 4406 | Qnil, |
1ab256cb RM |
4407 | "t means display ... on previous line when a line is invisible.\n\ |
4408 | Automatically becomes buffer-local when set in any fashion."); | |
4409 | #endif | |
4410 | ||
0fa3ba92 | 4411 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 4412 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
4413 | The value should be one of `overwrite-mode-textual',\n\ |
4414 | `overwrite-mode-binary', or nil.\n\ | |
4415 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 4416 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 4417 | until the tab is filled in.\n\ |
6bbb0d4a | 4418 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
4419 | Automatically becomes buffer-local when set in any fashion."); |
4420 | ||
54939090 RS |
4421 | #if 0 /* The doc string is too long for some compilers, |
4422 | but make-docfile can find it in this comment. */ | |
1ab256cb | 4423 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 4424 | Qnil, |
1ab256cb RM |
4425 | "Display table that controls display of the contents of current buffer.\n\ |
4426 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
4427 | The display table is a char-table created with `make-display-table'.\n\ |
4428 | The ordinary char-table elements control how to display each possible text\n\ | |
4429 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 4430 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
4431 | There are six extra slots to control the display of\n\ |
4432 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
4433 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 4434 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
4435 | (extra-slot 2, a single character);\n\ |
4436 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 4437 | a single character);\n\ |
6fdc249f | 4438 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
4439 | a vector of characters);\n\ |
4440 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
4441 | (extra-slot 5, a single character).\n\ |
4442 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
4443 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
4444 | Each window can have its own, overriding display table."); | |
54939090 RS |
4445 | #endif |
4446 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 4447 | Qnil, 0); |
1ab256cb | 4448 | |
0552666b GM |
4449 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
4450 | Qnil, | |
4451 | "*Width of left marginal area for display of a buffer.\n\ | |
4452 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4453 | A value of nil means no marginal area."); | |
4454 | ||
4455 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
4456 | Qnil, | |
4457 | "*Width of right marginal area for display of a buffer.\n\ | |
4458 | Automatically becomes buffer-local when set in any fashion.\n\ | |
4459 | A value of nil means no marginal area."); | |
4460 | ||
4461 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
4462 | ¤t_buffer->indicate_empty_lines, Qnil, | |
4463 | "*Non-nil means visually indicate lines not displaying text.\n\ | |
4464 | Automatically becomes buffer-local when set in any fashion.\n"); | |
4465 | ||
4466 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
4467 | ¤t_buffer->scroll_up_aggressively, Qnil, | |
4468 | "*If a number, scroll display up aggressively.\n\ | |
4469 | If scrolling a window because point is above the window start, choose\n\ | |
4470 | a new window start so that point ends up that fraction of the window's\n\ | |
4471 | height from the bottom of the window.\n\ | |
4472 | Automatically becomes buffer-local when set in any fashion."); | |
4473 | ||
4474 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
4475 | ¤t_buffer->scroll_down_aggressively, Qnil, | |
4476 | "*If a number, scroll display down aggressively.\n\ | |
4477 | If scrolling a window because point is below the window end, choose\n\ | |
4478 | a new window start so that point ends up that fraction of the window's\n\ | |
4479 | height from the top of the window.\n\ | |
4480 | Automatically becomes buffer-local when set in any fashion."); | |
4481 | ||
1ab256cb RM |
4482 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
4483 | "Don't ask."); | |
4484 | */ | |
01050cb5 | 4485 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
f0724bcb | 4486 | "If non-nil, a function to call before each text change (obsolete).\n\ |
1ab256cb RM |
4487 | Two arguments are passed to the function: the positions of\n\ |
4488 | the beginning and end of the range of old text to be changed.\n\ | |
4489 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4490 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 4491 | \n\ |
5f079267 | 4492 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
4493 | don't call any before-change or after-change functions.\n\ |
4494 | That's because these variables are temporarily set to nil.\n\ | |
4495 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4496 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4497 | accomplishing an equivalent result by using other variables.\n\n\ |
4498 | This variable is obsolete; use `before-change-functions' instead."); | |
1ab256cb RM |
4499 | Vbefore_change_function = Qnil; |
4500 | ||
4501 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
f0724bcb | 4502 | "If non-nil, a Function to call after each text change (obsolete).\n\ |
1ab256cb RM |
4503 | Three arguments are passed to the function: the positions of\n\ |
4504 | the beginning and end of the range of changed text,\n\ | |
4505 | and the length of the pre-change text replaced by that range.\n\ | |
4506 | \(For an insertion, the pre-change length is zero;\n\ | |
839dd834 | 4507 | for a deletion, that length is the number of bytes deleted,\n\ |
1ab256cb RM |
4508 | and the post-change beginning and end are at the same place.)\n\ |
4509 | \n\ | |
5f079267 | 4510 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
4511 | don't call any before-change or after-change functions.\n\ |
4512 | That's because these variables are temporarily set to nil.\n\ | |
4513 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4514 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4515 | accomplishing an equivalent result by using other variables.\n\n\ |
4516 | This variable is obsolete; use `after-change-functions' instead."); | |
1ab256cb RM |
4517 | Vafter_change_function = Qnil; |
4518 | ||
5f079267 RS |
4519 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
4520 | "List of functions to call before each text change.\n\ | |
4521 | Two arguments are passed to each function: the positions of\n\ | |
4522 | the beginning and end of the range of old text to be changed.\n\ | |
4523 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4524 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
4525 | \n\ |
4526 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
4527 | don't call any before-change or after-change functions.\n\ |
4528 | That's because these variables are temporarily set to nil.\n\ | |
4529 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4530 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
4531 | accomplishing an equivalent result by using other variables.\n\ |
4532 | \n\ | |
4533 | If an unhandled error happens in running these functions,\n\ | |
4534 | the variable's value remains nil. That prevents the error\n\ | |
4535 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
4536 | Vbefore_change_functions = Qnil; |
4537 | ||
4538 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
4539 | "List of function to call after each text change.\n\ | |
4540 | Three arguments are passed to each function: the positions of\n\ | |
4541 | the beginning and end of the range of changed text,\n\ | |
839dd834 | 4542 | and the length in bytes of the pre-change text replaced by that range.\n\ |
5f079267 | 4543 | \(For an insertion, the pre-change length is zero;\n\ |
839dd834 | 4544 | for a deletion, that length is the number of bytes deleted,\n\ |
5f079267 RS |
4545 | and the post-change beginning and end are at the same place.)\n\ |
4546 | \n\ | |
4547 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
4548 | don't call any before-change or after-change functions.\n\ |
4549 | That's because these variables are temporarily set to nil.\n\ | |
4550 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4551 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
4552 | accomplishing an equivalent result by using other variables.\n\ |
4553 | \n\ | |
4554 | If an unhandled error happens in running these functions,\n\ | |
4555 | the variable's value remains nil. That prevents the error\n\ | |
4556 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
4557 | Vafter_change_functions = Qnil; |
4558 | ||
dbc4e1c1 JB |
4559 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
4560 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
4561 | The functions are run using the `run-hooks' function."); | |
4562 | Vfirst_change_hook = Qnil; | |
1ab256cb | 4563 | |
54939090 RS |
4564 | #if 0 /* The doc string is too long for some compilers, |
4565 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 4566 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb | 4567 | "List of undo entries in current buffer.\n\ |
3fd364db | 4568 | This variable is always local in all buffers.\n\ |
1ab256cb RM |
4569 | Recent changes come first; older changes follow newer.\n\ |
4570 | \n\ | |
630f4018 KH |
4571 | An entry (BEG . END) represents an insertion which begins at\n\ |
4572 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
4573 | \n\ |
4574 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
4575 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
4576 | of the text being deleted; if negative, point was at the end.\n\ | |
4577 | \n\ | |
6c0df54a RS |
4578 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
4579 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
4580 | of the visited file's modification time, as of that time. If the\n\ | |
4581 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
4582 | obsolete.\n\ |
4583 | \n\ | |
6c0df54a RS |
4584 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
4585 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
4586 | and VALUE is the old value.\n\ | |
483c1fd3 | 4587 | \n\ |
da1c183c RS |
4588 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
4589 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
4590 | \n\ | |
bec44fd6 JB |
4591 | An entry of the form POSITION indicates that point was at the buffer\n\ |
4592 | location given by the integer. Undoing an entry of this form places\n\ | |
4593 | point at POSITION.\n\ | |
4594 | \n\ | |
1ab256cb RM |
4595 | nil marks undo boundaries. The undo command treats the changes\n\ |
4596 | between two undo boundaries as a single step to be undone.\n\ | |
4597 | \n\ | |
bec44fd6 | 4598 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
4599 | #endif |
4600 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 4601 | 0); |
1ab256cb | 4602 | |
c48f61ef RS |
4603 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
4604 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
4605 | Automatically local in all buffers."); | |
4606 | ||
28e969dd | 4607 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
4608 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
4609 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 4610 | \n\ |
f0c5b712 JB |
4611 | Normally, the line-motion functions work by scanning the buffer for\n\ |
4612 | newlines. Columnar operations (like move-to-column and\n\ | |
4613 | compute-motion) also work by scanning the buffer, summing character\n\ | |
4614 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 4615 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
4616 | motion functions will take longer to execute. Emacs may also take\n\ |
4617 | longer to update the display.\n\ | |
28e969dd | 4618 | \n\ |
f0c5b712 JB |
4619 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
4620 | results of their scans, and consult the cache to avoid rescanning\n\ | |
4621 | regions of the buffer until the text is modified. The caches are most\n\ | |
4622 | beneficial when they prevent the most searching---that is, when the\n\ | |
4623 | buffer contains long lines and large regions of characters with the\n\ | |
4624 | same, fixed screen width.\n\ | |
28e969dd | 4625 | \n\ |
f0c5b712 JB |
4626 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
4627 | become slightly slower (because of the overhead of consulting the\n\ | |
4628 | cache), and the caches will use memory roughly proportional to the\n\ | |
4629 | number of newlines and characters whose screen width varies.\n\ | |
4630 | \n\ | |
4631 | The caches require no explicit maintenance; their accuracy is\n\ | |
4632 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
4633 | the cache should not affect the behavior of any of the motion\n\ | |
4634 | functions; it should only affect their performance."); | |
28e969dd | 4635 | |
943e065b | 4636 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3fd364db RS |
4637 | "Value of point before the last series of scroll operations, or nil.\n\ |
4638 | This variable is always local in all buffers."); | |
943e065b | 4639 | |
be9aafdd BG |
4640 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
4641 | "List of formats to use when saving this buffer.\n\ | |
3fd364db | 4642 | This variable is always local in all buffers.\n\ |
be9aafdd BG |
4643 | Formats are defined by `format-alist'. This variable is\n\ |
4644 | set when a file is visited. Automatically local in all buffers."); | |
4645 | ||
3cb719bd RS |
4646 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4647 | ¤t_buffer->invisibility_spec, Qnil, | |
4648 | "Invisibility spec of this buffer.\n\ | |
3fd364db | 4649 | This variable is always local in all buffers.\n\ |
3cb719bd RS |
4650 | The default is t, which means that text is invisible\n\ |
4651 | if it has a non-nil `invisible' property.\n\ | |
4652 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
4653 | property is an element in that list.\n\ | |
554216ad KH |
4654 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
4655 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
4656 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
4657 | ||
7962a441 RS |
4658 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4659 | ¤t_buffer->display_count, Qnil, | |
3fd364db RS |
4660 | "A number incremented each time this buffer is displayed in a window.\n\ |
4661 | This variable is always local in all buffers.\n\ | |
4662 | The function `set-window-buffer increments it."); | |
4663 | ||
4664 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4665 | ¤t_buffer->display_time, Qnil, | |
4666 | "Time stamp updated each time this buffer is displayed in a window.\n\ | |
4667 | This variable is always local in all buffers.\n\ | |
4668 | The function `set-window-buffer' updates this variable\n\ | |
4669 | to the value obtained by calling `current-time'.\n\ | |
4670 | If the buffer has never been shown in a window, the value is nil."); | |
7962a441 | 4671 | |
c48f61ef | 4672 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
319c537c RS |
4673 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
4674 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ | |
4675 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ | |
4676 | all windows or just the selected window."); | |
c48f61ef RS |
4677 | Vtransient_mark_mode = Qnil; |
4678 | ||
0a4469c9 | 4679 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
4680 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
4681 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
4682 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
4683 | and disregard a `read-only' text property if the property value\n\ | |
4684 | is a member of the list."); | |
4685 | Vinhibit_read_only = Qnil; | |
4686 | ||
dcdffbf6 RS |
4687 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
4688 | "List of functions called with no args to query before killing a buffer."); | |
4689 | Vkill_buffer_query_functions = Qnil; | |
4690 | ||
0dc88e60 | 4691 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
4692 | defsubr (&Sbuffer_list); |
4693 | defsubr (&Sget_buffer); | |
4694 | defsubr (&Sget_file_buffer); | |
4695 | defsubr (&Sget_buffer_create); | |
336cd056 | 4696 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 4697 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
4698 | defsubr (&Sbuffer_name); |
4699 | /*defsubr (&Sbuffer_number);*/ | |
4700 | defsubr (&Sbuffer_file_name); | |
336cd056 | 4701 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
4702 | defsubr (&Sbuffer_local_variables); |
4703 | defsubr (&Sbuffer_modified_p); | |
4704 | defsubr (&Sset_buffer_modified_p); | |
4705 | defsubr (&Sbuffer_modified_tick); | |
4706 | defsubr (&Srename_buffer); | |
4707 | defsubr (&Sother_buffer); | |
4708 | defsubr (&Sbuffer_disable_undo); | |
4709 | defsubr (&Sbuffer_enable_undo); | |
4710 | defsubr (&Skill_buffer); | |
a9ee7a59 | 4711 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
4712 | defsubr (&Sswitch_to_buffer); |
4713 | defsubr (&Spop_to_buffer); | |
4714 | defsubr (&Scurrent_buffer); | |
4715 | defsubr (&Sset_buffer); | |
4716 | defsubr (&Sbarf_if_buffer_read_only); | |
4717 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
4718 | defsubr (&Serase_buffer); |
4719 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 4720 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 4721 | |
52f8ec73 | 4722 | defsubr (&Soverlayp); |
2eec3b4e RS |
4723 | defsubr (&Smake_overlay); |
4724 | defsubr (&Sdelete_overlay); | |
4725 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
4726 | defsubr (&Soverlay_start); |
4727 | defsubr (&Soverlay_end); | |
4728 | defsubr (&Soverlay_buffer); | |
4729 | defsubr (&Soverlay_properties); | |
2eec3b4e | 4730 | defsubr (&Soverlays_at); |
74514898 | 4731 | defsubr (&Soverlays_in); |
2eec3b4e | 4732 | defsubr (&Snext_overlay_change); |
239c932b | 4733 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
4734 | defsubr (&Soverlay_recenter); |
4735 | defsubr (&Soverlay_lists); | |
4736 | defsubr (&Soverlay_get); | |
4737 | defsubr (&Soverlay_put); | |
1ab256cb RM |
4738 | } |
4739 | ||
dfcf069d | 4740 | void |
1ab256cb RM |
4741 | keys_of_buffer () |
4742 | { | |
4743 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
4744 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
4745 | |
4746 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
4747 | initialized when that function gets called. */ | |
4748 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 4749 | } |