Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
99a8b2d2 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997 |
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 RM |
25 | #include <sys/param.h> |
26 | ||
27 | #ifndef MAXPATHLEN | |
28 | /* in 4.1, param.h fails to define this. */ | |
29 | #define MAXPATHLEN 1024 | |
30 | #endif /* not MAXPATHLEN */ | |
31 | ||
18160b98 | 32 | #include <config.h> |
1ab256cb | 33 | #include "lisp.h" |
21cf4cf8 | 34 | #include "intervals.h" |
1ab256cb RM |
35 | #include "window.h" |
36 | #include "commands.h" | |
37 | #include "buffer.h" | |
3b06f880 | 38 | #include "charset.h" |
28e969dd | 39 | #include "region-cache.h" |
1ab256cb | 40 | #include "indent.h" |
d014bf88 | 41 | #include "blockinput.h" |
08460cd4 | 42 | #include "frame.h" |
1ab256cb RM |
43 | |
44 | struct buffer *current_buffer; /* the current buffer */ | |
45 | ||
46 | /* First buffer in chain of all buffers (in reverse order of creation). | |
47 | Threaded through ->next. */ | |
48 | ||
49 | struct buffer *all_buffers; | |
50 | ||
51 | /* This structure holds the default values of the buffer-local variables | |
52 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
53 | The default value occupies the same slot in this structure | |
54 | as an individual buffer's value occupies in that buffer. | |
55 | Setting the default value also goes through the alist of buffers | |
56 | and stores into each buffer that does not say it has a local value. */ | |
57 | ||
58 | struct buffer buffer_defaults; | |
59 | ||
60 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
61 | ||
62 | static Lisp_Object Vbuffer_defaults; | |
63 | ||
64 | /* This structure marks which slots in a buffer have corresponding | |
65 | default values in buffer_defaults. | |
66 | Each such slot has a nonzero value in this structure. | |
67 | The value has only one nonzero bit. | |
68 | ||
69 | When a buffer has its own local value for a slot, | |
70 | the bit for that slot (found in the same slot in this structure) | |
71 | is turned on in the buffer's local_var_flags slot. | |
72 | ||
73 | If a slot in this structure is -1, then even though there may | |
74 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
75 | and the corresponding slot in buffer_defaults is not used. | |
76 | ||
77 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
78 | but there is a default value which is copied into each buffer. | |
79 | ||
80 | If a slot in this structure is negative, then even though there may | |
81 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
82 | and the corresponding slot in buffer_defaults is not used. | |
83 | ||
84 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
85 | zero, that is a bug */ | |
86 | ||
87 | struct buffer buffer_local_flags; | |
88 | ||
89 | /* This structure holds the names of symbols whose values may be | |
90 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
91 | ||
92 | struct buffer buffer_local_symbols; | |
93 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
94 | static Lisp_Object Vbuffer_local_symbols; | |
95 | ||
0fa3ba92 JB |
96 | /* This structure holds the required types for the values in the |
97 | buffer-local slots. If a slot contains Qnil, then the | |
98 | corresponding buffer slot may contain a value of any type. If a | |
99 | slot contains an integer, then prospective values' tags must be | |
100 | equal to that integer. When a tag does not match, the function | |
101 | buffer_slot_type_mismatch will signal an error. */ | |
102 | struct buffer buffer_local_types; | |
103 | ||
13de9290 RS |
104 | /* Flags indicating which built-in buffer-local variables |
105 | are permanent locals. */ | |
106 | static int buffer_permanent_local_flags; | |
107 | ||
1ab256cb | 108 | Lisp_Object Fset_buffer (); |
01050cb5 | 109 | void set_buffer_internal (); |
c7aa5005 | 110 | void set_buffer_internal_1 (); |
173f2a64 | 111 | static void call_overlay_mod_hooks (); |
2f3f993b | 112 | static void swap_out_buffer_local_variables (); |
13de9290 | 113 | static void reset_buffer_local_variables (); |
1ab256cb RM |
114 | |
115 | /* Alist of all buffer names vs the buffers. */ | |
116 | /* This used to be a variable, but is no longer, | |
117 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
118 | Lisp_Object Vbuffer_alist; | |
119 | ||
120 | /* Functions to call before and after each text change. */ | |
121 | Lisp_Object Vbefore_change_function; | |
122 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
123 | Lisp_Object Vbefore_change_functions; |
124 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 125 | |
c48f61ef RS |
126 | Lisp_Object Vtransient_mark_mode; |
127 | ||
a96b68f1 RS |
128 | /* t means ignore all read-only text properties. |
129 | A list means ignore such a property if its value is a member of the list. | |
130 | Any non-nil value means ignore buffer-read-only. */ | |
131 | Lisp_Object Vinhibit_read_only; | |
132 | ||
dcdffbf6 RS |
133 | /* List of functions to call that can query about killing a buffer. |
134 | If any of these functions returns nil, we don't kill it. */ | |
135 | Lisp_Object Vkill_buffer_query_functions; | |
136 | ||
dbc4e1c1 JB |
137 | /* List of functions to call before changing an unmodified buffer. */ |
138 | Lisp_Object Vfirst_change_hook; | |
22378665 | 139 | |
dbc4e1c1 | 140 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
141 | Lisp_Object Qbefore_change_functions; |
142 | Lisp_Object Qafter_change_functions; | |
1ab256cb RM |
143 | |
144 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
145 | ||
146 | Lisp_Object Qprotected_field; | |
147 | ||
148 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
149 | ||
150 | Lisp_Object Qkill_buffer_hook; | |
151 | ||
5fe0b67e RS |
152 | Lisp_Object Qget_file_buffer; |
153 | ||
52f8ec73 JB |
154 | Lisp_Object Qoverlayp; |
155 | ||
bbbe9545 | 156 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 157 | |
294d215f RS |
158 | Lisp_Object Qmodification_hooks; |
159 | Lisp_Object Qinsert_in_front_hooks; | |
160 | Lisp_Object Qinsert_behind_hooks; | |
161 | ||
1ab256cb RM |
162 | /* For debugging; temporary. See set_buffer_internal. */ |
163 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
164 | ||
165 | nsberror (spec) | |
166 | Lisp_Object spec; | |
167 | { | |
a7a60ce9 | 168 | if (STRINGP (spec)) |
1ab256cb RM |
169 | error ("No buffer named %s", XSTRING (spec)->data); |
170 | error ("Invalid buffer argument"); | |
171 | } | |
172 | \f | |
0dc88e60 RS |
173 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
174 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ | |
175 | Value is nil if OBJECT is not a buffer or if it has been killed.") | |
176 | (object) | |
177 | Lisp_Object object; | |
178 | { | |
179 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
180 | ? Qt : Qnil); | |
181 | } | |
182 | ||
08460cd4 RS |
183 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
184 | "Return a list of all existing live buffers.\n\ | |
185 | If the optional arg FRAME is a frame, we return that frame's buffer list.") | |
186 | (frame) | |
187 | Lisp_Object frame; | |
1ab256cb | 188 | { |
08460cd4 RS |
189 | Lisp_Object framelist, general; |
190 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
191 | ||
192 | if (FRAMEP (frame)) | |
193 | { | |
194 | Lisp_Object tail; | |
195 | ||
196 | CHECK_FRAME (frame, 1); | |
197 | ||
198 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
199 | ||
200 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
201 | tail = framelist; | |
202 | while (! NILP (tail)) | |
203 | { | |
204 | general = Fdelq (XCONS (tail)->car, general); | |
205 | tail = XCONS (tail)->cdr; | |
206 | } | |
207 | return nconc2 (framelist, general); | |
208 | } | |
209 | ||
210 | return general; | |
1ab256cb RM |
211 | } |
212 | ||
04ae1b48 RS |
213 | /* Like Fassoc, but use Fstring_equal to compare |
214 | (which ignores text properties), | |
215 | and don't ever QUIT. */ | |
216 | ||
217 | static Lisp_Object | |
218 | assoc_ignore_text_properties (key, list) | |
219 | register Lisp_Object key; | |
220 | Lisp_Object list; | |
221 | { | |
222 | register Lisp_Object tail; | |
223 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
224 | { | |
225 | register Lisp_Object elt, tem; | |
226 | elt = Fcar (tail); | |
227 | tem = Fstring_equal (Fcar (elt), key); | |
228 | if (!NILP (tem)) | |
229 | return elt; | |
230 | } | |
231 | return Qnil; | |
232 | } | |
233 | ||
1ab256cb RM |
234 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
235 | "Return the buffer named NAME (a string).\n\ | |
236 | If there is no live buffer named NAME, return nil.\n\ | |
237 | NAME may also be a buffer; if so, the value is that buffer.") | |
238 | (name) | |
239 | register Lisp_Object name; | |
240 | { | |
a7a60ce9 | 241 | if (BUFFERP (name)) |
1ab256cb RM |
242 | return name; |
243 | CHECK_STRING (name, 0); | |
244 | ||
04ae1b48 | 245 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
246 | } |
247 | ||
248 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
249 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 250 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
251 | If there is no such live buffer, return nil.\n\ |
252 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
253 | (filename) |
254 | register Lisp_Object filename; | |
255 | { | |
256 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
257 | Lisp_Object handler; |
258 | ||
1ab256cb RM |
259 | CHECK_STRING (filename, 0); |
260 | filename = Fexpand_file_name (filename, Qnil); | |
261 | ||
5fe0b67e RS |
262 | /* If the file name has special constructs in it, |
263 | call the corresponding file handler. */ | |
a617e913 | 264 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
265 | if (!NILP (handler)) |
266 | return call2 (handler, Qget_file_buffer, filename); | |
267 | ||
1ab256cb RM |
268 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
269 | { | |
270 | buf = Fcdr (XCONS (tail)->car); | |
a7a60ce9 KH |
271 | if (!BUFFERP (buf)) continue; |
272 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 273 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 274 | if (!NILP (tem)) |
1ab256cb RM |
275 | return buf; |
276 | } | |
277 | return Qnil; | |
278 | } | |
279 | ||
52e01189 RS |
280 | Lisp_Object |
281 | get_truename_buffer (filename) | |
282 | register Lisp_Object filename; | |
283 | { | |
284 | register Lisp_Object tail, buf, tem; | |
285 | ||
286 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
287 | { | |
288 | buf = Fcdr (XCONS (tail)->car); | |
289 | if (!BUFFERP (buf)) continue; | |
290 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
291 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
292 | if (!NILP (tem)) | |
293 | return buf; | |
294 | } | |
295 | return Qnil; | |
296 | } | |
297 | ||
1ab256cb RM |
298 | /* Incremented for each buffer created, to assign the buffer number. */ |
299 | int buffer_count; | |
300 | ||
301 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
302 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
303 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 304 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
305 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
306 | The value is never nil.") | |
307 | (name) | |
308 | register Lisp_Object name; | |
309 | { | |
a9ee7a59 | 310 | register Lisp_Object buf; |
1ab256cb RM |
311 | register struct buffer *b; |
312 | ||
313 | buf = Fget_buffer (name); | |
265a9e55 | 314 | if (!NILP (buf)) |
1ab256cb RM |
315 | return buf; |
316 | ||
31cd83e9 KH |
317 | if (XSTRING (name)->size == 0) |
318 | error ("Empty string for buffer name is not allowed"); | |
319 | ||
9ac0d9e0 | 320 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb | 321 | |
336cd056 RS |
322 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
323 | ||
324 | /* An ordinary buffer uses its own struct buffer_text. */ | |
325 | b->text = &b->own_text; | |
326 | b->base_buffer = 0; | |
327 | ||
1ab256cb | 328 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 329 | BLOCK_INPUT; |
3b06f880 KH |
330 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
331 | anchoring a search. */ | |
332 | BUFFER_ALLOC (BUF_BEG_ADDR (b), (BUF_GAP_SIZE (b) + 1)); | |
9ac0d9e0 | 333 | UNBLOCK_INPUT; |
1ab256cb | 334 | if (! BUF_BEG_ADDR (b)) |
81841847 | 335 | buffer_memory_full (); |
1ab256cb RM |
336 | |
337 | BUF_PT (b) = 1; | |
338 | BUF_GPT (b) = 1; | |
339 | BUF_BEGV (b) = 1; | |
340 | BUF_ZV (b) = 1; | |
341 | BUF_Z (b) = 1; | |
342 | BUF_MODIFF (b) = 1; | |
2509d356 | 343 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
344 | BUF_SAVE_MODIFF (b) = 1; |
345 | BUF_INTERVALS (b) = 0; | |
3b06f880 | 346 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 347 | |
28e969dd JB |
348 | b->newline_cache = 0; |
349 | b->width_run_cache = 0; | |
350 | b->width_table = Qnil; | |
351 | ||
1ab256cb RM |
352 | /* Put this on the chain of all buffers including killed ones. */ |
353 | b->next = all_buffers; | |
354 | all_buffers = b; | |
355 | ||
336cd056 RS |
356 | /* An ordinary buffer normally doesn't need markers |
357 | to handle BEGV and ZV. */ | |
358 | b->pt_marker = Qnil; | |
359 | b->begv_marker = Qnil; | |
360 | b->zv_marker = Qnil; | |
04ae1b48 RS |
361 | |
362 | name = Fcopy_sequence (name); | |
363 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 364 | b->name = name; |
04ae1b48 | 365 | |
1ab256cb RM |
366 | if (XSTRING (name)->data[0] != ' ') |
367 | b->undo_list = Qnil; | |
368 | else | |
369 | b->undo_list = Qt; | |
370 | ||
371 | reset_buffer (b); | |
13de9290 | 372 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
373 | |
374 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 375 | XSETBUFFER (buf, b); |
1ab256cb RM |
376 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
377 | ||
378 | b->mark = Fmake_marker (); | |
336cd056 RS |
379 | BUF_MARKERS (b) = Qnil; |
380 | b->name = name; | |
381 | return buf; | |
382 | } | |
383 | ||
a2428fa2 | 384 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
193c3837 | 385 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
386 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
387 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
9e552710 RS |
388 | NAME should be a string which is not the name of an existing buffer.") |
389 | (base_buffer, name) | |
390 | register Lisp_Object base_buffer, name; | |
336cd056 RS |
391 | { |
392 | register Lisp_Object buf; | |
393 | register struct buffer *b; | |
394 | ||
395 | buf = Fget_buffer (name); | |
396 | if (!NILP (buf)) | |
397 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
398 | ||
399 | base_buffer = Fget_buffer (base_buffer); | |
400 | if (NILP (base_buffer)) | |
401 | error ("No such buffer: `%s'", | |
402 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
403 | ||
404 | if (XSTRING (name)->size == 0) | |
405 | error ("Empty string for buffer name is not allowed"); | |
406 | ||
407 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
408 | ||
409 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
410 | ||
411 | if (XBUFFER (base_buffer)->base_buffer) | |
412 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
413 | else | |
414 | b->base_buffer = XBUFFER (base_buffer); | |
415 | ||
416 | /* Use the base buffer's text object. */ | |
417 | b->text = b->base_buffer->text; | |
418 | ||
419 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
420 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
421 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
422 | ||
423 | b->newline_cache = 0; | |
424 | b->width_run_cache = 0; | |
425 | b->width_table = Qnil; | |
426 | ||
427 | /* Put this on the chain of all buffers including killed ones. */ | |
428 | b->next = all_buffers; | |
429 | all_buffers = b; | |
430 | ||
431 | name = Fcopy_sequence (name); | |
432 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
433 | b->name = name; | |
434 | ||
435 | reset_buffer (b); | |
13de9290 | 436 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
437 | |
438 | /* Put this in the alist of all live buffers. */ | |
439 | XSETBUFFER (buf, b); | |
440 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
441 | ||
442 | b->mark = Fmake_marker (); | |
1ab256cb | 443 | b->name = name; |
336cd056 RS |
444 | |
445 | /* Make sure the base buffer has markers for its narrowing. */ | |
446 | if (NILP (b->base_buffer->pt_marker)) | |
447 | { | |
448 | b->base_buffer->pt_marker = Fmake_marker (); | |
449 | Fset_marker (b->base_buffer->pt_marker, | |
450 | make_number (BUF_PT (b->base_buffer)), base_buffer); | |
451 | } | |
452 | if (NILP (b->base_buffer->begv_marker)) | |
453 | { | |
454 | b->base_buffer->begv_marker = Fmake_marker (); | |
455 | Fset_marker (b->base_buffer->begv_marker, | |
456 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); | |
457 | } | |
458 | if (NILP (b->base_buffer->zv_marker)) | |
459 | { | |
460 | b->base_buffer->zv_marker = Fmake_marker (); | |
461 | Fset_marker (b->base_buffer->zv_marker, | |
462 | make_number (BUF_ZV (b->base_buffer)), base_buffer); | |
26d84681 | 463 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
464 | } |
465 | ||
466 | /* Give the indirect buffer markers for its narrowing. */ | |
ea064aa0 RS |
467 | b->pt_marker = Fmake_marker (); |
468 | Fset_marker (b->pt_marker, make_number (BUF_PT (b)), buf); | |
469 | b->begv_marker = Fmake_marker (); | |
470 | Fset_marker (b->begv_marker, make_number (BUF_BEGV (b)), buf); | |
471 | b->zv_marker = Fmake_marker (); | |
472 | Fset_marker (b->zv_marker, make_number (BUF_ZV (b)), buf); | |
473 | ||
26d84681 | 474 | XMARKER (b->zv_marker)->insertion_type = 1; |
336cd056 | 475 | |
a9ee7a59 | 476 | return buf; |
1ab256cb RM |
477 | } |
478 | ||
bcd40520 RS |
479 | /* Reinitialize everything about a buffer except its name and contents |
480 | and local variables. */ | |
1ab256cb RM |
481 | |
482 | void | |
483 | reset_buffer (b) | |
484 | register struct buffer *b; | |
485 | { | |
486 | b->filename = Qnil; | |
f6ed2e84 | 487 | b->file_truename = Qnil; |
1ab256cb RM |
488 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
489 | b->modtime = 0; | |
8d7a4592 | 490 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 491 | b->last_window_start = 1; |
8b264726 RS |
492 | /* It is more conservative to start out "changed" than "unchanged". */ |
493 | b->clip_changed = 1; | |
1ab256cb RM |
494 | b->backed_up = Qnil; |
495 | b->auto_save_modified = 0; | |
84f6bcba | 496 | b->auto_save_failure_time = -1; |
1ab256cb RM |
497 | b->auto_save_file_name = Qnil; |
498 | b->read_only = Qnil; | |
2eec3b4e RS |
499 | b->overlays_before = Qnil; |
500 | b->overlays_after = Qnil; | |
8d7a4592 | 501 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 502 | b->mark_active = Qnil; |
943e065b | 503 | b->point_before_scroll = Qnil; |
be9aafdd | 504 | b->file_format = Qnil; |
0dc6f165 | 505 | b->last_selected_window = Qnil; |
7962a441 | 506 | XSETINT (b->display_count, 0); |
fb2030e3 RS |
507 | b->extra2 = Qnil; |
508 | b->extra3 = Qnil; | |
1ab256cb RM |
509 | } |
510 | ||
bcd40520 RS |
511 | /* Reset buffer B's local variables info. |
512 | Don't use this on a buffer that has already been in use; | |
513 | it does not treat permanent locals consistently. | |
13de9290 RS |
514 | Instead, use Fkill_all_local_variables. |
515 | ||
516 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
517 | buffer-local variables. If PERMANENT_TOO is 0, | |
518 | we preserve those. */ | |
bcd40520 | 519 | |
13de9290 RS |
520 | static void |
521 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 522 | register struct buffer *b; |
13de9290 | 523 | int permanent_too; |
1ab256cb RM |
524 | { |
525 | register int offset; | |
13de9290 RS |
526 | int dont_reset; |
527 | ||
528 | /* Decide which built-in local variables to reset. */ | |
529 | if (permanent_too) | |
530 | dont_reset = 0; | |
531 | else | |
532 | dont_reset = buffer_permanent_local_flags; | |
1ab256cb RM |
533 | |
534 | /* Reset the major mode to Fundamental, together with all the | |
535 | things that depend on the major mode. | |
536 | default-major-mode is handled at a higher level. | |
537 | We ignore it here. */ | |
538 | b->major_mode = Qfundamental_mode; | |
539 | b->keymap = Qnil; | |
540 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
541 | b->mode_name = QSFundamental; | |
542 | b->minor_modes = Qnil; | |
3446af9c RS |
543 | |
544 | /* If the standard case table has been altered and invalidated, | |
545 | fix up its insides first. */ | |
546 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
547 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
548 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
549 | Fset_standard_case_table (Vascii_downcase_table); | |
550 | ||
1ab256cb | 551 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
552 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
553 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
554 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 555 | b->invisibility_spec = Qt; |
2e716096 RS |
556 | #ifndef DOS_NT |
557 | b->buffer_file_type = Qnil; | |
558 | #endif | |
3cb719bd | 559 | |
1ab256cb RM |
560 | #if 0 |
561 | b->sort_table = XSTRING (Vascii_sort_table); | |
562 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
563 | #endif /* 0 */ | |
564 | ||
13de9290 | 565 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 566 | b->local_var_alist = Qnil; |
13de9290 | 567 | b->local_var_flags &= dont_reset; |
1ab256cb RM |
568 | |
569 | /* For each slot that has a default value, | |
570 | copy that into the slot. */ | |
571 | ||
572 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
573 | offset < sizeof (struct buffer); | |
4d2f1389 | 574 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
575 | { |
576 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
13de9290 RS |
577 | if ((flag > 0 |
578 | /* Don't reset a permanent local. */ | |
579 | && ! (dont_reset & flag)) | |
580 | || flag == -2) | |
581 | *(Lisp_Object *)(offset + (char *)b) | |
582 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
aab80822 | 583 | } |
1ab256cb RM |
584 | } |
585 | ||
01050cb5 RM |
586 | /* We split this away from generate-new-buffer, because rename-buffer |
587 | and set-visited-file-name ought to be able to use this to really | |
588 | rename the buffer properly. */ | |
589 | ||
590 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 591 | 1, 2, 0, |
01050cb5 RM |
592 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
593 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 594 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 595 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 596 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 597 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 598 | even if a buffer with that name exists.") |
c273e647 RS |
599 | (name, ignore) |
600 | register Lisp_Object name, ignore; | |
1ab256cb RM |
601 | { |
602 | register Lisp_Object gentemp, tem; | |
603 | int count; | |
604 | char number[10]; | |
605 | ||
606 | CHECK_STRING (name, 0); | |
607 | ||
608 | tem = Fget_buffer (name); | |
265a9e55 | 609 | if (NILP (tem)) |
01050cb5 | 610 | return name; |
1ab256cb RM |
611 | |
612 | count = 1; | |
613 | while (1) | |
614 | { | |
615 | sprintf (number, "<%d>", ++count); | |
616 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 617 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
618 | if (!NILP (tem)) |
619 | return gentemp; | |
1ab256cb | 620 | tem = Fget_buffer (gentemp); |
265a9e55 | 621 | if (NILP (tem)) |
01050cb5 | 622 | return gentemp; |
1ab256cb RM |
623 | } |
624 | } | |
625 | ||
626 | \f | |
627 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
628 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 629 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
630 | (buffer) |
631 | register Lisp_Object buffer; | |
632 | { | |
265a9e55 | 633 | if (NILP (buffer)) |
1ab256cb RM |
634 | return current_buffer->name; |
635 | CHECK_BUFFER (buffer, 0); | |
636 | return XBUFFER (buffer)->name; | |
637 | } | |
638 | ||
639 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
640 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
641 | No argument or nil as argument means use the current buffer.") | |
642 | (buffer) | |
643 | register Lisp_Object buffer; | |
644 | { | |
265a9e55 | 645 | if (NILP (buffer)) |
1ab256cb RM |
646 | return current_buffer->filename; |
647 | CHECK_BUFFER (buffer, 0); | |
648 | return XBUFFER (buffer)->filename; | |
649 | } | |
650 | ||
336cd056 RS |
651 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
652 | 0, 1, 0, | |
653 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
654 | If BUFFER is not indirect, return nil.") | |
655 | (buffer) | |
656 | register Lisp_Object buffer; | |
657 | { | |
658 | struct buffer *base; | |
659 | Lisp_Object base_buffer; | |
660 | ||
661 | if (NILP (buffer)) | |
662 | base = current_buffer->base_buffer; | |
663 | else | |
664 | { | |
665 | CHECK_BUFFER (buffer, 0); | |
666 | base = XBUFFER (buffer)->base_buffer; | |
667 | } | |
668 | ||
669 | if (! base) | |
670 | return Qnil; | |
671 | XSETBUFFER (base_buffer, base); | |
672 | return base_buffer; | |
673 | } | |
674 | ||
1ab256cb RM |
675 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
676 | Sbuffer_local_variables, 0, 1, 0, | |
677 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
678 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
679 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
680 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
681 | No argument or nil as argument means use current buffer as BUFFER.") | |
682 | (buffer) | |
683 | register Lisp_Object buffer; | |
684 | { | |
685 | register struct buffer *buf; | |
553defa4 | 686 | register Lisp_Object result; |
1ab256cb | 687 | |
265a9e55 | 688 | if (NILP (buffer)) |
1ab256cb RM |
689 | buf = current_buffer; |
690 | else | |
691 | { | |
692 | CHECK_BUFFER (buffer, 0); | |
693 | buf = XBUFFER (buffer); | |
694 | } | |
695 | ||
553defa4 RS |
696 | result = Qnil; |
697 | ||
1ab256cb | 698 | { |
553defa4 RS |
699 | register Lisp_Object tail; |
700 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 701 | { |
553defa4 RS |
702 | Lisp_Object val, elt; |
703 | ||
704 | elt = XCONS (tail)->car; | |
705 | ||
e0585c64 RS |
706 | /* Reference each variable in the alist in buf. |
707 | If inquiring about the current buffer, this gets the current values, | |
708 | so store them into the alist so the alist is up to date. | |
709 | If inquiring about some other buffer, this swaps out any values | |
710 | for that buffer, making the alist up to date automatically. */ | |
711 | val = find_symbol_value (XCONS (elt)->car); | |
712 | /* Use the current buffer value only if buf is the current buffer. */ | |
713 | if (buf != current_buffer) | |
553defa4 RS |
714 | val = XCONS (elt)->cdr; |
715 | ||
716 | /* If symbol is unbound, put just the symbol in the list. */ | |
717 | if (EQ (val, Qunbound)) | |
718 | result = Fcons (XCONS (elt)->car, result); | |
719 | /* Otherwise, put (symbol . value) in the list. */ | |
720 | else | |
721 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
722 | } |
723 | } | |
724 | ||
1ab256cb RM |
725 | /* Add on all the variables stored in special slots. */ |
726 | { | |
727 | register int offset, mask; | |
728 | ||
729 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
730 | offset < sizeof (struct buffer); | |
4d2f1389 | 731 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 732 | { |
aab80822 | 733 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 734 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
735 | if (SYMBOLP (*(Lisp_Object *)(offset |
736 | + (char *)&buffer_local_symbols))) | |
737 | result = Fcons (Fcons (*((Lisp_Object *) | |
738 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
739 | *(Lisp_Object *)(offset + (char *)buf)), |
740 | result); | |
1ab256cb RM |
741 | } |
742 | } | |
553defa4 RS |
743 | |
744 | return result; | |
1ab256cb RM |
745 | } |
746 | ||
747 | \f | |
748 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
749 | 0, 1, 0, | |
750 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
751 | No argument or nil as argument means use current buffer as BUFFER.") | |
752 | (buffer) | |
753 | register Lisp_Object buffer; | |
754 | { | |
755 | register struct buffer *buf; | |
265a9e55 | 756 | if (NILP (buffer)) |
1ab256cb RM |
757 | buf = current_buffer; |
758 | else | |
759 | { | |
760 | CHECK_BUFFER (buffer, 0); | |
761 | buf = XBUFFER (buffer); | |
762 | } | |
763 | ||
336cd056 | 764 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
765 | } |
766 | ||
767 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
768 | 1, 1, 0, | |
769 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
770 | A non-nil FLAG means mark the buffer modified.") | |
771 | (flag) | |
772 | register Lisp_Object flag; | |
773 | { | |
774 | register int already; | |
775 | register Lisp_Object fn; | |
776 | ||
777 | #ifdef CLASH_DETECTION | |
778 | /* If buffer becoming modified, lock the file. | |
779 | If buffer becoming unmodified, unlock the file. */ | |
780 | ||
60f4dd23 | 781 | fn = current_buffer->file_truename; |
265a9e55 | 782 | if (!NILP (fn)) |
1ab256cb | 783 | { |
336cd056 | 784 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 785 | if (!already && !NILP (flag)) |
1ab256cb | 786 | lock_file (fn); |
265a9e55 | 787 | else if (already && NILP (flag)) |
1ab256cb RM |
788 | unlock_file (fn); |
789 | } | |
790 | #endif /* CLASH_DETECTION */ | |
791 | ||
336cd056 | 792 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
793 | update_mode_lines++; |
794 | return flag; | |
795 | } | |
796 | ||
797 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
798 | 0, 1, 0, | |
799 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
800 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
801 | that buffer is changed. It wraps around occasionally.\n\ | |
802 | No argument or nil as argument means use current buffer as BUFFER.") | |
803 | (buffer) | |
804 | register Lisp_Object buffer; | |
805 | { | |
806 | register struct buffer *buf; | |
265a9e55 | 807 | if (NILP (buffer)) |
1ab256cb RM |
808 | buf = current_buffer; |
809 | else | |
810 | { | |
811 | CHECK_BUFFER (buffer, 0); | |
812 | buf = XBUFFER (buffer); | |
813 | } | |
814 | ||
815 | return make_number (BUF_MODIFF (buf)); | |
816 | } | |
817 | \f | |
01050cb5 | 818 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 819 | "sRename buffer (to new name): \nP", |
1ab256cb | 820 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 821 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 822 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 823 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 824 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
825 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
826 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 827 | This does not change the name of the visited file (if any).") |
489c043a RS |
828 | (newname, unique) |
829 | register Lisp_Object newname, unique; | |
1ab256cb RM |
830 | { |
831 | register Lisp_Object tem, buf; | |
832 | ||
489c043a | 833 | CHECK_STRING (newname, 0); |
d59698c4 | 834 | |
489c043a | 835 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
836 | error ("Empty string is invalid as a buffer name"); |
837 | ||
489c043a | 838 | tem = Fget_buffer (newname); |
c059b5ea RM |
839 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
840 | the buffer automatically so you can create another with the original name. | |
841 | It makes UNIQUE equivalent to | |
489c043a | 842 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 843 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 844 | return current_buffer->name; |
265a9e55 | 845 | if (!NILP (tem)) |
01050cb5 | 846 | { |
3bd779aa | 847 | if (!NILP (unique)) |
489c043a | 848 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 849 | else |
489c043a | 850 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 851 | } |
1ab256cb | 852 | |
489c043a | 853 | current_buffer->name = newname; |
76f590d7 JB |
854 | |
855 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
856 | any windows displaying current_buffer will stay unchanged. */ | |
857 | update_mode_lines++; | |
858 | ||
67180c6a | 859 | XSETBUFFER (buf, current_buffer); |
489c043a | 860 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
861 | if (NILP (current_buffer->filename) |
862 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 863 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
864 | /* Refetch since that last call may have done GC. */ |
865 | return current_buffer->name; | |
1ab256cb RM |
866 | } |
867 | ||
a0ebb746 | 868 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 869 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
870 | Buffers not visible in windows are preferred to visible buffers,\n\ |
871 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
872 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
873 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
874 | (buffer, visible_ok) |
875 | register Lisp_Object buffer, visible_ok; | |
1ab256cb | 876 | { |
89132f25 | 877 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 878 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
879 | notsogood = Qnil; |
880 | ||
7962a441 RS |
881 | tail = Vbuffer_alist; |
882 | pred = frame_buffer_predicate (); | |
883 | ||
884 | /* Consider buffers that have been seen in the selected frame | |
885 | before other buffers. */ | |
886 | ||
887 | tem = frame_buffer_list (); | |
888 | add_ons = Qnil; | |
889 | while (CONSP (tem)) | |
890 | { | |
891 | if (BUFFERP (XCONS (tem)->car)) | |
892 | add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons); | |
893 | tem = XCONS (tem)->cdr; | |
894 | } | |
895 | tail = nconc2 (Fnreverse (add_ons), tail); | |
896 | ||
897 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
898 | { |
899 | buf = Fcdr (Fcar (tail)); | |
900 | if (EQ (buf, buffer)) | |
901 | continue; | |
902 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
903 | continue; | |
04ae1b48 RS |
904 | /* If the selected frame has a buffer_predicate, |
905 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 906 | if (!NILP (pred)) |
04ae1b48 | 907 | { |
7962a441 | 908 | tem = call1 (pred, buf); |
04ae1b48 RS |
909 | if (NILP (tem)) |
910 | continue; | |
911 | } | |
04ae1b48 | 912 | |
a0ebb746 | 913 | if (NILP (visible_ok)) |
db732e5a | 914 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
915 | else |
916 | tem = Qnil; | |
265a9e55 | 917 | if (NILP (tem)) |
1ab256cb | 918 | return buf; |
265a9e55 | 919 | if (NILP (notsogood)) |
1ab256cb RM |
920 | notsogood = buf; |
921 | } | |
265a9e55 | 922 | if (!NILP (notsogood)) |
1ab256cb | 923 | return notsogood; |
89132f25 KH |
924 | buf = Fget_buffer_create (build_string ("*scratch*")); |
925 | Fset_buffer_major_mode (buf); | |
926 | return buf; | |
1ab256cb RM |
927 | } |
928 | \f | |
316784fb KH |
929 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
930 | 0, 1, "", | |
5b8bcf48 RS |
931 | "Make BUFFER stop keeping undo information.\n\ |
932 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
933 | (buffer) |
934 | register Lisp_Object buffer; | |
1ab256cb | 935 | { |
ffd56f97 JB |
936 | Lisp_Object real_buffer; |
937 | ||
938 | if (NILP (buffer)) | |
67180c6a | 939 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
940 | else |
941 | { | |
942 | real_buffer = Fget_buffer (buffer); | |
943 | if (NILP (real_buffer)) | |
944 | nsberror (buffer); | |
945 | } | |
946 | ||
947 | XBUFFER (real_buffer)->undo_list = Qt; | |
948 | ||
1ab256cb RM |
949 | return Qnil; |
950 | } | |
951 | ||
952 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
953 | 0, 1, "", | |
954 | "Start keeping undo information for buffer BUFFER.\n\ | |
955 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
956 | (buffer) |
957 | register Lisp_Object buffer; | |
1ab256cb | 958 | { |
ffd56f97 | 959 | Lisp_Object real_buffer; |
1ab256cb | 960 | |
ffd56f97 | 961 | if (NILP (buffer)) |
67180c6a | 962 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
963 | else |
964 | { | |
ffd56f97 JB |
965 | real_buffer = Fget_buffer (buffer); |
966 | if (NILP (real_buffer)) | |
967 | nsberror (buffer); | |
1ab256cb RM |
968 | } |
969 | ||
ffd56f97 JB |
970 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
971 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
972 | |
973 | return Qnil; | |
974 | } | |
975 | ||
976 | /* | |
977 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
978 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
979 | The buffer being killed will be current while the hook is running.\n\ | |
980 | See `kill-buffer'." | |
981 | */ | |
982 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
983 | "Kill the buffer BUFFER.\n\ | |
984 | The argument may be a buffer or may be the name of a buffer.\n\ | |
985 | An argument of nil means kill the current buffer.\n\n\ | |
986 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
987 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
988 | if not void, is a list of functions to be called, with no arguments,\n\ | |
989 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
990 | when the hook functions are called.\n\n\ | |
991 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 992 | with SIGHUP.") |
a25f13ae KH |
993 | (buffer) |
994 | Lisp_Object buffer; | |
1ab256cb RM |
995 | { |
996 | Lisp_Object buf; | |
997 | register struct buffer *b; | |
998 | register Lisp_Object tem; | |
999 | register struct Lisp_Marker *m; | |
1000 | struct gcpro gcpro1, gcpro2; | |
1001 | ||
a25f13ae | 1002 | if (NILP (buffer)) |
1ab256cb RM |
1003 | buf = Fcurrent_buffer (); |
1004 | else | |
a25f13ae | 1005 | buf = Fget_buffer (buffer); |
265a9e55 | 1006 | if (NILP (buf)) |
a25f13ae | 1007 | nsberror (buffer); |
1ab256cb RM |
1008 | |
1009 | b = XBUFFER (buf); | |
1010 | ||
4a4a9db5 KH |
1011 | /* Avoid trouble for buffer already dead. */ |
1012 | if (NILP (b->name)) | |
1013 | return Qnil; | |
1014 | ||
1ab256cb | 1015 | /* Query if the buffer is still modified. */ |
265a9e55 | 1016 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1017 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1018 | { |
a25f13ae | 1019 | GCPRO1 (buf); |
1ab256cb RM |
1020 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
1021 | XSTRING (b->name)->data)); | |
1022 | UNGCPRO; | |
265a9e55 | 1023 | if (NILP (tem)) |
1ab256cb RM |
1024 | return Qnil; |
1025 | } | |
1026 | ||
dcdffbf6 | 1027 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
1028 | { |
1029 | register Lisp_Object val; | |
1030 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 1031 | Lisp_Object list; |
1ab256cb RM |
1032 | |
1033 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1034 | set_buffer_internal (b); | |
dcdffbf6 RS |
1035 | |
1036 | /* First run the query functions; if any query is answered no, | |
1037 | don't kill the buffer. */ | |
1038 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1039 | { | |
1040 | tem = call0 (Fcar (list)); | |
1041 | if (NILP (tem)) | |
1042 | return unbind_to (count, Qnil); | |
1043 | } | |
1044 | ||
1045 | /* Then run the hooks. */ | |
fd186f07 RS |
1046 | if (!NILP (Vrun_hooks)) |
1047 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1048 | unbind_to (count, Qnil); |
1049 | } | |
1050 | ||
1051 | /* We have no more questions to ask. Verify that it is valid | |
1052 | to kill the buffer. This must be done after the questions | |
1053 | since anything can happen within do_yes_or_no_p. */ | |
1054 | ||
1055 | /* Don't kill the minibuffer now current. */ | |
1056 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1057 | return Qnil; | |
1058 | ||
265a9e55 | 1059 | if (NILP (b->name)) |
1ab256cb RM |
1060 | return Qnil; |
1061 | ||
336cd056 RS |
1062 | /* When we kill a base buffer, kill all its indirect buffers. |
1063 | We do it at this stage so nothing terrible happens if they | |
1064 | ask questions or their hooks get errors. */ | |
1065 | if (! b->base_buffer) | |
1066 | { | |
1067 | struct buffer *other; | |
1068 | ||
1069 | GCPRO1 (buf); | |
1070 | ||
1071 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1072 | /* all_buffers contains dead buffers too; |
1073 | don't re-kill them. */ | |
1074 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1075 | { |
1076 | Lisp_Object buf; | |
1077 | XSETBUFFER (buf, other); | |
1078 | Fkill_buffer (buf); | |
1079 | } | |
1080 | ||
1081 | UNGCPRO; | |
1082 | } | |
1083 | ||
1ab256cb RM |
1084 | /* Make this buffer not be current. |
1085 | In the process, notice if this is the sole visible buffer | |
1086 | and give up if so. */ | |
1087 | if (b == current_buffer) | |
1088 | { | |
172a9c1f | 1089 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
1090 | Fset_buffer (tem); |
1091 | if (b == current_buffer) | |
1092 | return Qnil; | |
1093 | } | |
1094 | ||
1095 | /* Now there is no question: we can kill the buffer. */ | |
1096 | ||
1097 | #ifdef CLASH_DETECTION | |
1098 | /* Unlock this buffer's file, if it is locked. */ | |
1099 | unlock_buffer (b); | |
1100 | #endif /* CLASH_DETECTION */ | |
1101 | ||
1ab256cb | 1102 | kill_buffer_processes (buf); |
1ab256cb RM |
1103 | |
1104 | tem = Vinhibit_quit; | |
1105 | Vinhibit_quit = Qt; | |
00550f94 | 1106 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1107 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1108 | frames_discard_buffer (buf); |
1ab256cb RM |
1109 | Vinhibit_quit = tem; |
1110 | ||
9b59d6d0 | 1111 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1112 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 RS |
1113 | && b->auto_save_modified != 0 |
1114 | && SAVE_MODIFF < b->auto_save_modified) | |
1ab256cb RM |
1115 | { |
1116 | Lisp_Object tem; | |
1117 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1118 | if (! NILP (tem)) |
cbb6a418 | 1119 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1120 | } |
1121 | ||
4a4a9db5 KH |
1122 | if (b->base_buffer) |
1123 | { | |
1124 | /* Unchain all markers that belong to this indirect buffer. | |
1125 | Don't unchain the markers that belong to the base buffer | |
1126 | or its other indirect buffers. */ | |
1127 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1128 | { | |
1129 | Lisp_Object next; | |
1130 | m = XMARKER (tem); | |
1131 | next = m->chain; | |
1132 | if (m->buffer == b) | |
1133 | unchain_marker (tem); | |
1134 | tem = next; | |
1135 | } | |
1136 | } | |
1137 | else | |
1ab256cb | 1138 | { |
4a4a9db5 | 1139 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1140 | and leave them pointing nowhere. */ |
4a4a9db5 | 1141 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1142 | { |
1143 | m = XMARKER (tem); | |
1144 | m->buffer = 0; | |
1145 | tem = m->chain; | |
1146 | m->chain = Qnil; | |
1147 | } | |
1148 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1149 | |
336cd056 RS |
1150 | #ifdef USE_TEXT_PROPERTIES |
1151 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1152 | #endif | |
1153 | ||
1154 | /* Perhaps we should explicitly free the interval tree here... */ | |
1155 | } | |
33f7013e | 1156 | |
2f3f993b RS |
1157 | /* Reset the local variables, so that this buffer's local values |
1158 | won't be protected from GC. They would be protected | |
1159 | if they happened to remain encached in their symbols. | |
1160 | This gets rid of them for certain. */ | |
1161 | swap_out_buffer_local_variables (b); | |
13de9290 | 1162 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1163 | |
1ab256cb | 1164 | b->name = Qnil; |
336cd056 | 1165 | |
9ac0d9e0 | 1166 | BLOCK_INPUT; |
336cd056 RS |
1167 | if (! b->base_buffer) |
1168 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1169 | ||
28e969dd JB |
1170 | if (b->newline_cache) |
1171 | { | |
1172 | free_region_cache (b->newline_cache); | |
1173 | b->newline_cache = 0; | |
1174 | } | |
1175 | if (b->width_run_cache) | |
1176 | { | |
1177 | free_region_cache (b->width_run_cache); | |
1178 | b->width_run_cache = 0; | |
1179 | } | |
1180 | b->width_table = Qnil; | |
9ac0d9e0 | 1181 | UNBLOCK_INPUT; |
1ab256cb RM |
1182 | b->undo_list = Qnil; |
1183 | ||
1184 | return Qt; | |
1185 | } | |
1186 | \f | |
36a8c287 JB |
1187 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1188 | we do this each time BUF is selected visibly, the more recently | |
1189 | selected buffers are always closer to the front of the list. This | |
1190 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1191 | |
1192 | record_buffer (buf) | |
1193 | Lisp_Object buf; | |
1194 | { | |
1195 | register Lisp_Object link, prev; | |
1196 | ||
1197 | prev = Qnil; | |
1198 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1199 | { | |
1200 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1201 | break; | |
1202 | prev = link; | |
1203 | } | |
1204 | ||
36a8c287 JB |
1205 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1206 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1207 | |
265a9e55 | 1208 | if (NILP (prev)) |
1ab256cb RM |
1209 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1210 | else | |
1211 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1212 | ||
7962a441 | 1213 | XCONS (link)->cdr = Vbuffer_alist; |
1ab256cb | 1214 | Vbuffer_alist = link; |
7962a441 RS |
1215 | |
1216 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1217 | ||
1218 | prev = Qnil; | |
1219 | for (link = frame_buffer_list (); CONSP (link); link = XCONS (link)->cdr) | |
1220 | { | |
1221 | if (EQ (XCONS (link)->car, buf)) | |
1222 | break; | |
1223 | prev = link; | |
1224 | } | |
1225 | ||
1226 | /* Effectively do delq. */ | |
1227 | ||
1228 | if (CONSP (link)) | |
1229 | { | |
1230 | if (NILP (prev)) | |
1231 | set_frame_buffer_list (XCONS (frame_buffer_list ())->cdr); | |
1232 | else | |
1233 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1234 | ||
1235 | XCONS (link)->cdr = frame_buffer_list (); | |
1236 | set_frame_buffer_list (link); | |
1237 | } | |
1238 | else | |
1239 | set_frame_buffer_list (Fcons (buf, frame_buffer_list ())); | |
1ab256cb RM |
1240 | } |
1241 | ||
a9ee7a59 KH |
1242 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1243 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1244 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1245 | the current buffer's major mode.") | |
a2428fa2 EN |
1246 | (buffer) |
1247 | Lisp_Object buffer; | |
a9ee7a59 KH |
1248 | { |
1249 | int count; | |
1250 | Lisp_Object function; | |
1251 | ||
1252 | function = buffer_defaults.major_mode; | |
1253 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1254 | function = current_buffer->major_mode; | |
1255 | ||
1256 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1257 | return Qnil; | |
1258 | ||
1259 | count = specpdl_ptr - specpdl; | |
1260 | ||
1261 | /* To select a nonfundamental mode, | |
1262 | select the buffer temporarily and then call the mode function. */ | |
1263 | ||
1264 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1265 | ||
a2428fa2 | 1266 | Fset_buffer (buffer); |
a9ee7a59 KH |
1267 | call0 (function); |
1268 | ||
1269 | return unbind_to (count, Qnil); | |
1270 | } | |
1271 | ||
1ab256cb RM |
1272 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1273 | "Select buffer BUFFER in the current window.\n\ | |
1274 | BUFFER may be a buffer or a buffer name.\n\ | |
1275 | Optional second arg NORECORD non-nil means\n\ | |
1276 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1277 | \n\ | |
1278 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1279 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1280 | the window-buffer correspondences.") | |
a25f13ae KH |
1281 | (buffer, norecord) |
1282 | Lisp_Object buffer, norecord; | |
1ab256cb RM |
1283 | { |
1284 | register Lisp_Object buf; | |
1285 | Lisp_Object tem; | |
1286 | ||
1287 | if (EQ (minibuf_window, selected_window)) | |
1288 | error ("Cannot switch buffers in minibuffer window"); | |
1289 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1290 | if (!NILP (tem)) |
1ab256cb RM |
1291 | error ("Cannot switch buffers in a dedicated window"); |
1292 | ||
a25f13ae | 1293 | if (NILP (buffer)) |
172a9c1f | 1294 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1295 | else |
a9ee7a59 | 1296 | { |
a25f13ae | 1297 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1298 | if (NILP (buf)) |
1299 | { | |
a25f13ae | 1300 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1301 | Fset_buffer_major_mode (buf); |
1302 | } | |
1303 | } | |
1ab256cb | 1304 | Fset_buffer (buf); |
265a9e55 | 1305 | if (NILP (norecord)) |
1ab256cb RM |
1306 | record_buffer (buf); |
1307 | ||
1308 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1309 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1310 | : selected_window, | |
1ab256cb RM |
1311 | buf); |
1312 | ||
cd0c235a | 1313 | return buf; |
1ab256cb RM |
1314 | } |
1315 | ||
cd0c235a | 1316 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
1ab256cb RM |
1317 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
1318 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1319 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1320 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1321 | window even if BUFFER is already visible in the selected window.\n\ |
1322 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
6d12711f RS |
1323 | of `display-buffer' for additional customization information.\n\ |
1324 | \n\ | |
1325 | Optional third arg NORECORD non-nil means\n\ | |
1326 | do not put this buffer at the front of the list of recently selected ones.") | |
1327 | (buffer, other_window, norecord) | |
1328 | Lisp_Object buffer, other_window, norecord; | |
1ab256cb RM |
1329 | { |
1330 | register Lisp_Object buf; | |
a25f13ae | 1331 | if (NILP (buffer)) |
172a9c1f | 1332 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1333 | else |
7c2087ee | 1334 | { |
a25f13ae | 1335 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1336 | if (NILP (buf)) |
1337 | { | |
a25f13ae | 1338 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1339 | Fset_buffer_major_mode (buf); |
1340 | } | |
1341 | } | |
1ab256cb | 1342 | Fset_buffer (buf); |
6d12711f RS |
1343 | if (NILP (norecord)) |
1344 | record_buffer (buf); | |
a2428fa2 | 1345 | Fselect_window (Fdisplay_buffer (buf, other_window)); |
e8b3a22d | 1346 | return buf; |
1ab256cb RM |
1347 | } |
1348 | ||
1349 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1350 | "Return the current buffer as a Lisp object.") | |
1351 | () | |
1352 | { | |
1353 | register Lisp_Object buf; | |
67180c6a | 1354 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1355 | return buf; |
1356 | } | |
1357 | \f | |
c7aa5005 | 1358 | /* Set the current buffer to B. */ |
1ab256cb RM |
1359 | |
1360 | void | |
1361 | set_buffer_internal (b) | |
1362 | register struct buffer *b; | |
1363 | { | |
1364 | register struct buffer *old_buf; | |
1365 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1366 | Lisp_Object tem; |
1ab256cb RM |
1367 | |
1368 | if (current_buffer == b) | |
1369 | return; | |
1370 | ||
1371 | windows_or_buffers_changed = 1; | |
c7aa5005 KH |
1372 | set_buffer_internal_1 (b); |
1373 | } | |
1374 | ||
1375 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1376 | This is used by redisplay. */ | |
1377 | ||
1378 | void | |
1379 | set_buffer_internal_1 (b) | |
1380 | register struct buffer *b; | |
1381 | { | |
1382 | register struct buffer *old_buf; | |
1383 | register Lisp_Object tail, valcontents; | |
1384 | Lisp_Object tem; | |
1385 | ||
1386 | if (current_buffer == b) | |
1387 | return; | |
1388 | ||
1ab256cb RM |
1389 | old_buf = current_buffer; |
1390 | current_buffer = b; | |
1391 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1392 | ||
336cd056 RS |
1393 | if (old_buf) |
1394 | { | |
1395 | /* Put the undo list back in the base buffer, so that it appears | |
1396 | that an indirect buffer shares the undo list of its base. */ | |
1397 | if (old_buf->base_buffer) | |
1398 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1399 | ||
1400 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1401 | when it is not current, update them now. */ | |
1402 | if (! NILP (old_buf->pt_marker)) | |
1403 | { | |
1404 | Lisp_Object obuf; | |
1405 | XSETBUFFER (obuf, old_buf); | |
1406 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1407 | } | |
1408 | if (! NILP (old_buf->begv_marker)) | |
1409 | { | |
1410 | Lisp_Object obuf; | |
1411 | XSETBUFFER (obuf, old_buf); | |
1412 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1413 | } | |
1414 | if (! NILP (old_buf->zv_marker)) | |
1415 | { | |
1416 | Lisp_Object obuf; | |
1417 | XSETBUFFER (obuf, old_buf); | |
1418 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | /* Get the undo list from the base buffer, so that it appears | |
1423 | that an indirect buffer shares the undo list of its base. */ | |
1424 | if (b->base_buffer) | |
1425 | b->undo_list = b->base_buffer->undo_list; | |
1426 | ||
1427 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1428 | when it is not current, fetch them now. */ | |
1429 | if (! NILP (b->pt_marker)) | |
1430 | BUF_PT (b) = marker_position (b->pt_marker); | |
1431 | if (! NILP (b->begv_marker)) | |
1432 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1433 | if (! NILP (b->zv_marker)) | |
1434 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1435 | ||
1ab256cb RM |
1436 | /* Look down buffer's list of local Lisp variables |
1437 | to find and update any that forward into C variables. */ | |
1438 | ||
265a9e55 | 1439 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1440 | { |
1441 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1442 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1443 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1444 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1445 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1446 | /* Just reference the variable |
1447 | to cause it to become set for this buffer. */ | |
1448 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1449 | } | |
1450 | ||
1451 | /* Do the same with any others that were local to the previous buffer */ | |
1452 | ||
1453 | if (old_buf) | |
265a9e55 | 1454 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1455 | { |
1456 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1457 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1458 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1459 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1460 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1461 | /* Just reference the variable |
1462 | to cause it to become set for this buffer. */ | |
1463 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1464 | } | |
1465 | } | |
1466 | ||
336cd056 | 1467 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1468 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1469 | |
1470 | void | |
1471 | set_buffer_temp (b) | |
1472 | struct buffer *b; | |
1473 | { | |
1474 | register struct buffer *old_buf; | |
1475 | ||
1476 | if (current_buffer == b) | |
1477 | return; | |
1478 | ||
1479 | old_buf = current_buffer; | |
1480 | current_buffer = b; | |
1481 | ||
1482 | if (old_buf) | |
1483 | { | |
1484 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1485 | when it is not current, update them now. */ | |
1486 | if (! NILP (old_buf->pt_marker)) | |
1487 | { | |
1488 | Lisp_Object obuf; | |
1489 | XSETBUFFER (obuf, old_buf); | |
1490 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1491 | } | |
1492 | if (! NILP (old_buf->begv_marker)) | |
1493 | { | |
1494 | Lisp_Object obuf; | |
1495 | XSETBUFFER (obuf, old_buf); | |
1496 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1497 | } | |
1498 | if (! NILP (old_buf->zv_marker)) | |
1499 | { | |
1500 | Lisp_Object obuf; | |
1501 | XSETBUFFER (obuf, old_buf); | |
1502 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1507 | when it is not current, fetch them now. */ | |
1508 | if (! NILP (b->pt_marker)) | |
1509 | BUF_PT (b) = marker_position (b->pt_marker); | |
1510 | if (! NILP (b->begv_marker)) | |
1511 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1512 | if (! NILP (b->zv_marker)) | |
1513 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1514 | } | |
1515 | ||
1ab256cb RM |
1516 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1517 | "Make the buffer BUFFER current for editing operations.\n\ | |
1518 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1519 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1520 | This function does not display the buffer, so its effect ends\n\ | |
1521 | when the current command terminates.\n\ | |
1522 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1523 | (buffer) |
1524 | register Lisp_Object buffer; | |
1ab256cb | 1525 | { |
a25f13ae KH |
1526 | register Lisp_Object buf; |
1527 | buf = Fget_buffer (buffer); | |
1528 | if (NILP (buf)) | |
1529 | nsberror (buffer); | |
1530 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1531 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1532 | set_buffer_internal (XBUFFER (buf)); |
1533 | return buf; | |
1ab256cb RM |
1534 | } |
1535 | \f | |
1536 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1537 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1538 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1539 | () | |
1540 | { | |
a96b68f1 RS |
1541 | if (!NILP (current_buffer->read_only) |
1542 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1543 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1544 | return Qnil; | |
1545 | } | |
1546 | ||
1547 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1548 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1549 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1550 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1551 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1552 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1553 | selected window if it is displayed there.") | |
a2428fa2 EN |
1554 | (buffer) |
1555 | register Lisp_Object buffer; | |
1ab256cb | 1556 | { |
b271272a | 1557 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1558 | if (NILP (buffer)) |
a5611885 | 1559 | { |
a2428fa2 | 1560 | XSETBUFFER (buffer, current_buffer); |
a5611885 | 1561 | } |
1ab256cb RM |
1562 | else |
1563 | { | |
1564 | Lisp_Object buf1; | |
1565 | ||
a2428fa2 | 1566 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1567 | if (NILP (buf1)) |
a2428fa2 EN |
1568 | nsberror (buffer); |
1569 | buffer = buf1; | |
b271272a JB |
1570 | } |
1571 | ||
435bc840 RS |
1572 | /* Unshow the buffer in the selected window, if it is there. */ |
1573 | if (EQ (XWINDOW (selected_window)->buffer, buffer)) | |
1574 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil), Qnil); | |
1575 | /* Otherwise, unshow it in other frames. */ | |
1576 | else | |
1577 | Freplace_buffer_in_windows (buffer); | |
1578 | ||
a2428fa2 | 1579 | /* Move buffer to the end of the buffer list. */ |
b271272a JB |
1580 | { |
1581 | register Lisp_Object aelt, link; | |
1582 | ||
a2428fa2 | 1583 | aelt = Frassq (buffer, Vbuffer_alist); |
b271272a JB |
1584 | link = Fmemq (aelt, Vbuffer_alist); |
1585 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1586 | XCONS (link)->cdr = Qnil; | |
1587 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1588 | } | |
1ab256cb | 1589 | |
dcb26650 | 1590 | frames_bury_buffer (buffer); |
dec989eb | 1591 | |
1ab256cb RM |
1592 | return Qnil; |
1593 | } | |
1594 | \f | |
c922bc55 | 1595 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1596 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1597 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1598 | so the buffer is truly empty after this.") |
1599 | () | |
1600 | { | |
1601 | Fwiden (); | |
1602 | del_range (BEG, Z); | |
1603 | current_buffer->last_window_start = 1; | |
1604 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1605 | if future size is less than past size. Use of erase-buffer | |
1606 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1607 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1608 | return Qnil; |
1609 | } | |
1610 | ||
1611 | validate_region (b, e) | |
1612 | register Lisp_Object *b, *e; | |
1613 | { | |
1ab256cb RM |
1614 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1615 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1616 | ||
1617 | if (XINT (*b) > XINT (*e)) | |
1618 | { | |
03192067 KH |
1619 | Lisp_Object tem; |
1620 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1621 | } |
1622 | ||
1623 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1624 | && XINT (*e) <= ZV)) | |
1625 | args_out_of_range (*b, *e); | |
1626 | } | |
1627 | \f | |
1ab256cb RM |
1628 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1629 | 0, 0, 0, | |
1630 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1631 | Most local variable bindings are eliminated so that the default values\n\ | |
1632 | become effective once more. Also, the syntax table is set from\n\ | |
1633 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1634 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1635 | This function also forces redisplay of the mode line.\n\ | |
1636 | \n\ | |
1637 | Every function to select a new major mode starts by\n\ | |
1638 | calling this function.\n\n\ | |
1639 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1640 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1641 | \n\ | |
1642 | The first thing this function does is run\n\ | |
1643 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1644 | () |
1645 | { | |
1646 | register Lisp_Object alist, sym, tem; | |
1647 | Lisp_Object oalist; | |
7410477a | 1648 | |
fd186f07 RS |
1649 | if (!NILP (Vrun_hooks)) |
1650 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1651 | oalist = current_buffer->local_var_alist; |
1652 | ||
2f3f993b RS |
1653 | /* Make sure none of the bindings in oalist |
1654 | remain swapped in, in their symbols. */ | |
1ab256cb | 1655 | |
2f3f993b | 1656 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
1657 | |
1658 | /* Actually eliminate all local bindings of this buffer. */ | |
1659 | ||
13de9290 | 1660 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
1661 | |
1662 | /* Redisplay mode lines; we are changing major mode. */ | |
1663 | ||
1664 | update_mode_lines++; | |
1665 | ||
1666 | /* Any which are supposed to be permanent, | |
1667 | make local again, with the same values they had. */ | |
1668 | ||
265a9e55 | 1669 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1670 | { |
1671 | sym = XCONS (XCONS (alist)->car)->car; | |
1672 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1673 | if (! NILP (tem)) |
01050cb5 RM |
1674 | { |
1675 | Fmake_local_variable (sym); | |
1676 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1677 | } | |
1ab256cb RM |
1678 | } |
1679 | ||
1680 | /* Force mode-line redisplay. Useful here because all major mode | |
1681 | commands call this function. */ | |
1682 | update_mode_lines++; | |
1683 | ||
1684 | return Qnil; | |
1685 | } | |
2f3f993b RS |
1686 | |
1687 | /* Make sure no local variables remain set up with buffer B | |
1688 | for their current values. */ | |
1689 | ||
1690 | static void | |
1691 | swap_out_buffer_local_variables (b) | |
1692 | struct buffer *b; | |
1693 | { | |
1694 | Lisp_Object oalist, alist, sym, tem, buffer; | |
1695 | ||
1696 | XSETBUFFER (buffer, b); | |
1697 | oalist = b->local_var_alist; | |
1698 | ||
1699 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) | |
1700 | { | |
1701 | sym = XCONS (XCONS (alist)->car)->car; | |
1702 | ||
1703 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1704 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; | |
1705 | if (XBUFFER (tem) == current_buffer) | |
1706 | { | |
1707 | /* Symbol is set up for this buffer's old local value. | |
1708 | Set it up for the current buffer with the default value. */ | |
1709 | ||
1710 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; | |
1711 | /* Store the symbol's current value into the alist entry | |
1712 | it is currently set up for. This is so that, if the | |
1713 | local is marked permanent, and we make it local again | |
1714 | later in Fkill_all_local_variables, we don't lose the value. */ | |
1715 | XCONS (XCONS (tem)->car)->cdr | |
1716 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); | |
1717 | /* Switch to the symbol's default-value alist entry. */ | |
1718 | XCONS (tem)->car = tem; | |
1719 | /* Mark it as current for buffer B. */ | |
1720 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car | |
1721 | = buffer; | |
1722 | /* Store the current value into any forwarding in the symbol. */ | |
1723 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, | |
1724 | XCONS (tem)->cdr); | |
1725 | } | |
1726 | } | |
1727 | } | |
1ab256cb | 1728 | \f |
2eec3b4e RS |
1729 | /* Find all the overlays in the current buffer that contain position POS. |
1730 | Return the number found, and store them in a vector in *VEC_PTR. | |
1731 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1732 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1733 | or ZV if there are no more overlays. | |
bbbe9545 | 1734 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
239c932b RS |
1735 | or BEGV if there are no previous overlays. |
1736 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1737 | |
1738 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1739 | when this function is called. |
1740 | ||
1741 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1742 | If EXTEND is zero, we never extend the vector, | |
1743 | and we store only as many overlays as will fit. | |
1744 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1745 | |
1746 | int | |
239c932b | 1747 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1748 | int pos; |
61d54cd5 | 1749 | int extend; |
2eec3b4e RS |
1750 | Lisp_Object **vec_ptr; |
1751 | int *len_ptr; | |
1752 | int *next_ptr; | |
239c932b | 1753 | int *prev_ptr; |
1ab256cb | 1754 | { |
2eec3b4e RS |
1755 | Lisp_Object tail, overlay, start, end, result; |
1756 | int idx = 0; | |
1757 | int len = *len_ptr; | |
1758 | Lisp_Object *vec = *vec_ptr; | |
1759 | int next = ZV; | |
239c932b | 1760 | int prev = BEGV; |
61d54cd5 RS |
1761 | int inhibit_storing = 0; |
1762 | ||
2eec3b4e | 1763 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1764 | GC_CONSP (tail); |
2eec3b4e RS |
1765 | tail = XCONS (tail)->cdr) |
1766 | { | |
239c932b | 1767 | int startpos, endpos; |
52f8ec73 | 1768 | |
2eec3b4e | 1769 | overlay = XCONS (tail)->car; |
1ab256cb | 1770 | |
2eec3b4e RS |
1771 | start = OVERLAY_START (overlay); |
1772 | end = OVERLAY_END (overlay); | |
239c932b RS |
1773 | endpos = OVERLAY_POSITION (end); |
1774 | if (endpos < pos) | |
1775 | { | |
1776 | if (prev < endpos) | |
1777 | prev = endpos; | |
1778 | break; | |
1779 | } | |
1780 | if (endpos == pos) | |
1781 | continue; | |
2eec3b4e RS |
1782 | startpos = OVERLAY_POSITION (start); |
1783 | if (startpos <= pos) | |
1784 | { | |
1785 | if (idx == len) | |
1786 | { | |
61d54cd5 RS |
1787 | /* The supplied vector is full. |
1788 | Either make it bigger, or don't store any more in it. */ | |
1789 | if (extend) | |
1790 | { | |
1791 | *len_ptr = len *= 2; | |
1792 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1793 | *vec_ptr = vec; | |
1794 | } | |
1795 | else | |
1796 | inhibit_storing = 1; | |
2eec3b4e | 1797 | } |
61d54cd5 RS |
1798 | |
1799 | if (!inhibit_storing) | |
1800 | vec[idx] = overlay; | |
1801 | /* Keep counting overlays even if we can't return them all. */ | |
1802 | idx++; | |
2eec3b4e RS |
1803 | } |
1804 | else if (startpos < next) | |
1805 | next = startpos; | |
1806 | } | |
1807 | ||
1808 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1809 | GC_CONSP (tail); |
2eec3b4e | 1810 | tail = XCONS (tail)->cdr) |
1ab256cb | 1811 | { |
239c932b | 1812 | int startpos, endpos; |
52f8ec73 | 1813 | |
2eec3b4e | 1814 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1815 | |
1816 | start = OVERLAY_START (overlay); | |
1817 | end = OVERLAY_END (overlay); | |
1818 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1819 | if (pos < startpos) |
2eec3b4e RS |
1820 | { |
1821 | if (startpos < next) | |
1822 | next = startpos; | |
1823 | break; | |
1824 | } | |
239c932b RS |
1825 | endpos = OVERLAY_POSITION (end); |
1826 | if (pos < endpos) | |
2eec3b4e RS |
1827 | { |
1828 | if (idx == len) | |
1829 | { | |
61d54cd5 RS |
1830 | if (extend) |
1831 | { | |
1832 | *len_ptr = len *= 2; | |
1833 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1834 | *vec_ptr = vec; | |
1835 | } | |
1836 | else | |
1837 | inhibit_storing = 1; | |
2eec3b4e | 1838 | } |
61d54cd5 RS |
1839 | |
1840 | if (!inhibit_storing) | |
1841 | vec[idx] = overlay; | |
1842 | idx++; | |
2eec3b4e | 1843 | } |
239c932b RS |
1844 | else if (endpos < pos && endpos > prev) |
1845 | prev = endpos; | |
1ab256cb RM |
1846 | } |
1847 | ||
239c932b RS |
1848 | if (next_ptr) |
1849 | *next_ptr = next; | |
1850 | if (prev_ptr) | |
1851 | *prev_ptr = prev; | |
2eec3b4e RS |
1852 | return idx; |
1853 | } | |
74514898 RS |
1854 | \f |
1855 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
1856 | or are empty at BEG. |
1857 | ||
74514898 RS |
1858 | Return the number found, and store them in a vector in *VEC_PTR. |
1859 | Store in *LEN_PTR the size allocated for the vector. | |
1860 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
1861 | or ZV if there are no more overlays. | |
1862 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
1863 | or BEGV if there are no previous overlays. | |
1864 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
1865 | ||
1866 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
1867 | when this function is called. | |
1868 | ||
1869 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1870 | If EXTEND is zero, we never extend the vector, | |
1871 | and we store only as many overlays as will fit. | |
1872 | But we still return the total number of overlays. */ | |
1873 | ||
1874 | int | |
1875 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
1876 | int beg, end; | |
1877 | int extend; | |
1878 | Lisp_Object **vec_ptr; | |
1879 | int *len_ptr; | |
1880 | int *next_ptr; | |
1881 | int *prev_ptr; | |
1882 | { | |
1883 | Lisp_Object tail, overlay, ostart, oend, result; | |
1884 | int idx = 0; | |
1885 | int len = *len_ptr; | |
1886 | Lisp_Object *vec = *vec_ptr; | |
1887 | int next = ZV; | |
1888 | int prev = BEGV; | |
1889 | int inhibit_storing = 0; | |
1890 | ||
1891 | for (tail = current_buffer->overlays_before; | |
1892 | GC_CONSP (tail); | |
1893 | tail = XCONS (tail)->cdr) | |
1894 | { | |
1895 | int startpos, endpos; | |
1896 | ||
1897 | overlay = XCONS (tail)->car; | |
1898 | ||
1899 | ostart = OVERLAY_START (overlay); | |
1900 | oend = OVERLAY_END (overlay); | |
1901 | endpos = OVERLAY_POSITION (oend); | |
1902 | if (endpos < beg) | |
1903 | { | |
1904 | if (prev < endpos) | |
1905 | prev = endpos; | |
1906 | break; | |
1907 | } | |
1908 | startpos = OVERLAY_POSITION (ostart); | |
1909 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 1910 | or is empty at the start of the range. */ |
74514898 | 1911 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1912 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1913 | { |
1914 | if (idx == len) | |
1915 | { | |
1916 | /* The supplied vector is full. | |
1917 | Either make it bigger, or don't store any more in it. */ | |
1918 | if (extend) | |
1919 | { | |
1920 | *len_ptr = len *= 2; | |
1921 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1922 | *vec_ptr = vec; | |
1923 | } | |
1924 | else | |
1925 | inhibit_storing = 1; | |
1926 | } | |
1927 | ||
1928 | if (!inhibit_storing) | |
1929 | vec[idx] = overlay; | |
1930 | /* Keep counting overlays even if we can't return them all. */ | |
1931 | idx++; | |
1932 | } | |
1933 | else if (startpos < next) | |
1934 | next = startpos; | |
1935 | } | |
1936 | ||
1937 | for (tail = current_buffer->overlays_after; | |
1938 | GC_CONSP (tail); | |
1939 | tail = XCONS (tail)->cdr) | |
1940 | { | |
1941 | int startpos, endpos; | |
1942 | ||
1943 | overlay = XCONS (tail)->car; | |
1944 | ||
1945 | ostart = OVERLAY_START (overlay); | |
1946 | oend = OVERLAY_END (overlay); | |
1947 | startpos = OVERLAY_POSITION (ostart); | |
1948 | if (end < startpos) | |
1949 | { | |
1950 | if (startpos < next) | |
1951 | next = startpos; | |
1952 | break; | |
1953 | } | |
1954 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
1955 | /* Count an interval if it either overlaps the range |
1956 | or is empty at the start of the range. */ | |
74514898 | 1957 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1958 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1959 | { |
1960 | if (idx == len) | |
1961 | { | |
1962 | if (extend) | |
1963 | { | |
1964 | *len_ptr = len *= 2; | |
1965 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1966 | *vec_ptr = vec; | |
1967 | } | |
1968 | else | |
1969 | inhibit_storing = 1; | |
1970 | } | |
1971 | ||
1972 | if (!inhibit_storing) | |
1973 | vec[idx] = overlay; | |
1974 | idx++; | |
1975 | } | |
1976 | else if (endpos < beg && endpos > prev) | |
1977 | prev = endpos; | |
1978 | } | |
fc04fa47 | 1979 | |
74514898 RS |
1980 | if (next_ptr) |
1981 | *next_ptr = next; | |
1982 | if (prev_ptr) | |
1983 | *prev_ptr = prev; | |
1984 | return idx; | |
1985 | } | |
1986 | \f | |
fc04fa47 KH |
1987 | /* Fast function to just test if we're at an overlay boundary. */ |
1988 | int | |
1989 | overlay_touches_p (pos) | |
1990 | int pos; | |
1991 | { | |
1992 | Lisp_Object tail, overlay; | |
1993 | ||
1994 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
1995 | tail = XCONS (tail)->cdr) | |
1996 | { | |
1997 | int endpos; | |
1998 | ||
1999 | overlay = XCONS (tail)->car; | |
2000 | if (!GC_OVERLAYP (overlay)) | |
2001 | abort (); | |
2002 | ||
2003 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2004 | if (endpos < pos) | |
2005 | break; | |
2006 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2007 | return 1; | |
2008 | } | |
2009 | ||
2010 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
2011 | tail = XCONS (tail)->cdr) | |
2012 | { | |
2013 | int startpos; | |
2014 | ||
2015 | overlay = XCONS (tail)->car; | |
2016 | if (!GC_OVERLAYP (overlay)) | |
2017 | abort (); | |
2018 | ||
2019 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2020 | if (pos < startpos) | |
2021 | break; | |
2022 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2023 | return 1; | |
2024 | } | |
2025 | return 0; | |
2026 | } | |
2eec3b4e | 2027 | \f |
5985d248 KH |
2028 | struct sortvec |
2029 | { | |
2030 | Lisp_Object overlay; | |
2031 | int beg, end; | |
2032 | int priority; | |
2033 | }; | |
2034 | ||
2035 | static int | |
2036 | compare_overlays (s1, s2) | |
2037 | struct sortvec *s1, *s2; | |
2038 | { | |
2039 | if (s1->priority != s2->priority) | |
2040 | return s1->priority - s2->priority; | |
2041 | if (s1->beg != s2->beg) | |
2042 | return s1->beg - s2->beg; | |
2043 | if (s1->end != s2->end) | |
2044 | return s2->end - s1->end; | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | /* Sort an array of overlays by priority. The array is modified in place. | |
2049 | The return value is the new size; this may be smaller than the original | |
2050 | size if some of the overlays were invalid or were window-specific. */ | |
2051 | int | |
2052 | sort_overlays (overlay_vec, noverlays, w) | |
2053 | Lisp_Object *overlay_vec; | |
2054 | int noverlays; | |
2055 | struct window *w; | |
2056 | { | |
2057 | int i, j; | |
2058 | struct sortvec *sortvec; | |
2059 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2060 | ||
2061 | /* Put the valid and relevant overlays into sortvec. */ | |
2062 | ||
2063 | for (i = 0, j = 0; i < noverlays; i++) | |
2064 | { | |
0fa767e7 | 2065 | Lisp_Object tem; |
c99fc30f | 2066 | Lisp_Object overlay; |
5985d248 | 2067 | |
c99fc30f | 2068 | overlay = overlay_vec[i]; |
5985d248 KH |
2069 | if (OVERLAY_VALID (overlay) |
2070 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2071 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2072 | { | |
0fa767e7 KH |
2073 | /* If we're interested in a specific window, then ignore |
2074 | overlays that are limited to some other window. */ | |
2075 | if (w) | |
5985d248 | 2076 | { |
0fa767e7 KH |
2077 | Lisp_Object window; |
2078 | ||
2079 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2080 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2081 | continue; |
5985d248 | 2082 | } |
0fa767e7 KH |
2083 | |
2084 | /* This overlay is good and counts: put it into sortvec. */ | |
2085 | sortvec[j].overlay = overlay; | |
2086 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2087 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2088 | tem = Foverlay_get (overlay, Qpriority); | |
2089 | if (INTEGERP (tem)) | |
2090 | sortvec[j].priority = XINT (tem); | |
2091 | else | |
2092 | sortvec[j].priority = 0; | |
2093 | j++; | |
5985d248 KH |
2094 | } |
2095 | } | |
2096 | noverlays = j; | |
2097 | ||
2098 | /* Sort the overlays into the proper order: increasing priority. */ | |
2099 | ||
2100 | if (noverlays > 1) | |
2101 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2102 | ||
2103 | for (i = 0; i < noverlays; i++) | |
2104 | overlay_vec[i] = sortvec[i].overlay; | |
2105 | return (noverlays); | |
2106 | } | |
2107 | \f | |
bbbe9545 KH |
2108 | struct sortstr |
2109 | { | |
cb26008f | 2110 | Lisp_Object string, string2; |
bbbe9545 KH |
2111 | int size; |
2112 | int priority; | |
2113 | }; | |
2114 | ||
e8185fa8 KH |
2115 | struct sortstrlist |
2116 | { | |
2117 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2118 | int size; /* Allocated length of that array. */ | |
2119 | int used; /* How much of the array is currently in use. */ | |
2120 | int bytes; /* Total length of the strings in buf. */ | |
2121 | }; | |
2122 | ||
2123 | /* Buffers for storing information about the overlays touching a given | |
2124 | position. These could be automatic variables in overlay_strings, but | |
2125 | it's more efficient to hold onto the memory instead of repeatedly | |
2126 | allocating and freeing it. */ | |
2127 | static struct sortstrlist overlay_heads, overlay_tails; | |
2128 | static char *overlay_str_buf; | |
2129 | ||
2130 | /* Allocated length of overlay_str_buf. */ | |
2131 | static int overlay_str_len; | |
2132 | ||
bbbe9545 KH |
2133 | /* A comparison function suitable for passing to qsort. */ |
2134 | static int | |
2135 | cmp_for_strings (as1, as2) | |
2136 | char *as1, *as2; | |
2137 | { | |
2138 | struct sortstr *s1 = (struct sortstr *)as1; | |
2139 | struct sortstr *s2 = (struct sortstr *)as2; | |
2140 | if (s1->size != s2->size) | |
2141 | return s2->size - s1->size; | |
2142 | if (s1->priority != s2->priority) | |
2143 | return s1->priority - s2->priority; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
e8185fa8 | 2147 | static void |
cb26008f | 2148 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2149 | struct sortstrlist *ssl; |
cb26008f | 2150 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2151 | int size; |
2152 | { | |
2153 | if (ssl->used == ssl->size) | |
2154 | { | |
2155 | if (ssl->buf) | |
2156 | ssl->size *= 2; | |
2157 | else | |
2158 | ssl->size = 5; | |
2159 | ssl->buf = ((struct sortstr *) | |
2160 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2161 | } | |
2162 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2163 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2164 | ssl->buf[ssl->used].size = size; |
2165 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2166 | ssl->used++; | |
2167 | ssl->bytes += XSTRING (str)->size; | |
cb26008f KH |
2168 | if (STRINGP (str2)) |
2169 | ssl->bytes += XSTRING (str2)->size; | |
e8185fa8 | 2170 | } |
bbbe9545 KH |
2171 | |
2172 | /* Return the concatenation of the strings associated with overlays that | |
2173 | begin or end at POS, ignoring overlays that are specific to a window | |
2174 | other than W. The strings are concatenated in the appropriate order: | |
2175 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2176 | lower. Normally all of the after-strings come first, but zero-sized |
2177 | overlays have their after-strings ride along with the before-strings | |
2178 | because it would look strange to print them inside-out. | |
2179 | ||
2180 | Returns the string length, and stores the contents indirectly through | |
2181 | PSTR, if that variable is non-null. The string may be overwritten by | |
2182 | subsequent calls. */ | |
6b5d3b89 | 2183 | |
bbbe9545 KH |
2184 | int |
2185 | overlay_strings (pos, w, pstr) | |
2186 | int pos; | |
2187 | struct window *w; | |
6b5d3b89 | 2188 | unsigned char **pstr; |
bbbe9545 | 2189 | { |
e8185fa8 | 2190 | Lisp_Object ov, overlay, window, str; |
bbbe9545 KH |
2191 | int startpos, endpos; |
2192 | ||
e8185fa8 KH |
2193 | overlay_heads.used = overlay_heads.bytes = 0; |
2194 | overlay_tails.used = overlay_tails.bytes = 0; | |
bbbe9545 KH |
2195 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
2196 | { | |
2197 | overlay = XCONS (ov)->car; | |
2198 | if (!OVERLAYP (overlay)) | |
2199 | abort (); | |
2200 | ||
2201 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2202 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2203 | if (endpos < pos) | |
2204 | break; | |
2205 | if (endpos != pos && startpos != pos) | |
2206 | continue; | |
2207 | window = Foverlay_get (overlay, Qwindow); | |
2208 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2209 | continue; | |
e8185fa8 KH |
2210 | if (startpos == pos |
2211 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2212 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2213 | (startpos == endpos |
2214 | ? Foverlay_get (overlay, Qafter_string) | |
2215 | : Qnil), | |
2216 | Foverlay_get (overlay, Qpriority), | |
2217 | endpos - startpos); | |
2218 | else if (endpos == pos | |
2219 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2220 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2221 | Foverlay_get (overlay, Qpriority), |
2222 | endpos - startpos); | |
bbbe9545 KH |
2223 | } |
2224 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) | |
2225 | { | |
2226 | overlay = XCONS (ov)->car; | |
2227 | if (!OVERLAYP (overlay)) | |
2228 | abort (); | |
2229 | ||
2230 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2231 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2232 | if (startpos > pos) | |
2233 | break; | |
e8185fa8 KH |
2234 | if (endpos != pos && startpos != pos) |
2235 | continue; | |
2236 | window = Foverlay_get (overlay, Qwindow); | |
2237 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2238 | continue; | |
e8185fa8 KH |
2239 | if (startpos == pos |
2240 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2241 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2242 | (startpos == endpos |
2243 | ? Foverlay_get (overlay, Qafter_string) | |
2244 | : Qnil), | |
2245 | Foverlay_get (overlay, Qpriority), | |
2246 | endpos - startpos); | |
2247 | else if (endpos == pos | |
2248 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2249 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2250 | Foverlay_get (overlay, Qpriority), |
2251 | endpos - startpos); | |
bbbe9545 | 2252 | } |
e8185fa8 KH |
2253 | if (overlay_tails.used > 1) |
2254 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2255 | cmp_for_strings); | |
2256 | if (overlay_heads.used > 1) | |
2257 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2258 | cmp_for_strings); | |
2259 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2260 | { |
e8185fa8 | 2261 | Lisp_Object tem; |
bbbe9545 KH |
2262 | int i; |
2263 | char *p; | |
e8185fa8 | 2264 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2265 | |
2266 | if (total > overlay_str_len) | |
e8185fa8 KH |
2267 | overlay_str_buf = (char *)xrealloc (overlay_str_buf, |
2268 | overlay_str_len = total); | |
bbbe9545 | 2269 | p = overlay_str_buf; |
e8185fa8 | 2270 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2271 | { |
e8185fa8 | 2272 | tem = overlay_tails.buf[i].string; |
bbbe9545 KH |
2273 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2274 | p += XSTRING (tem)->size; | |
2275 | } | |
e8185fa8 | 2276 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2277 | { |
e8185fa8 | 2278 | tem = overlay_heads.buf[i].string; |
bbbe9545 KH |
2279 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2280 | p += XSTRING (tem)->size; | |
cb26008f KH |
2281 | tem = overlay_heads.buf[i].string2; |
2282 | if (STRINGP (tem)) | |
2283 | { | |
2284 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); | |
2285 | p += XSTRING (tem)->size; | |
2286 | } | |
bbbe9545 | 2287 | } |
cb26008f KH |
2288 | if (p != overlay_str_buf + total) |
2289 | abort (); | |
bbbe9545 KH |
2290 | if (pstr) |
2291 | *pstr = overlay_str_buf; | |
e8185fa8 | 2292 | return total; |
bbbe9545 | 2293 | } |
e8185fa8 | 2294 | return 0; |
bbbe9545 KH |
2295 | } |
2296 | \f | |
5c4f68f1 | 2297 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2298 | |
2eec3b4e | 2299 | void |
5c4f68f1 JB |
2300 | recenter_overlay_lists (buf, pos) |
2301 | struct buffer *buf; | |
2eec3b4e RS |
2302 | int pos; |
2303 | { | |
2304 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2305 | ||
2306 | /* See if anything in overlays_before should move to overlays_after. */ | |
2307 | ||
2308 | /* We don't strictly need prev in this loop; it should always be nil. | |
2309 | But we use it for symmetry and in case that should cease to be true | |
2310 | with some future change. */ | |
2311 | prev = Qnil; | |
5c4f68f1 | 2312 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2313 | CONSP (tail); |
2314 | prev = tail, tail = next) | |
1ab256cb | 2315 | { |
2eec3b4e RS |
2316 | next = XCONS (tail)->cdr; |
2317 | overlay = XCONS (tail)->car; | |
2318 | ||
2319 | /* If the overlay is not valid, get rid of it. */ | |
2320 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2321 | #if 1 |
2322 | abort (); | |
2323 | #else | |
2eec3b4e RS |
2324 | { |
2325 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2326 | if (!NILP (prev)) | |
2327 | XCONS (prev)->cdr = next; | |
2328 | else | |
5c4f68f1 | 2329 | buf->overlays_before = next; |
2eec3b4e RS |
2330 | tail = prev; |
2331 | continue; | |
2332 | } | |
52f8ec73 | 2333 | #endif |
1ab256cb | 2334 | |
2eec3b4e RS |
2335 | beg = OVERLAY_START (overlay); |
2336 | end = OVERLAY_END (overlay); | |
1ab256cb | 2337 | |
2eec3b4e | 2338 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2339 | { |
2eec3b4e RS |
2340 | /* OVERLAY needs to be moved. */ |
2341 | int where = OVERLAY_POSITION (beg); | |
2342 | Lisp_Object other, other_prev; | |
2343 | ||
2344 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2345 | if (!NILP (prev)) | |
2346 | XCONS (prev)->cdr = next; | |
2347 | else | |
5c4f68f1 | 2348 | buf->overlays_before = next; |
2eec3b4e RS |
2349 | |
2350 | /* Search thru overlays_after for where to put it. */ | |
2351 | other_prev = Qnil; | |
5c4f68f1 | 2352 | for (other = buf->overlays_after; |
2eec3b4e RS |
2353 | CONSP (other); |
2354 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 2355 | { |
2eec3b4e RS |
2356 | Lisp_Object otherbeg, otheroverlay, follower; |
2357 | int win; | |
2358 | ||
2359 | otheroverlay = XCONS (other)->car; | |
2360 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2361 | abort (); |
2eec3b4e RS |
2362 | |
2363 | otherbeg = OVERLAY_START (otheroverlay); | |
2364 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2365 | break; | |
1ab256cb | 2366 | } |
2eec3b4e RS |
2367 | |
2368 | /* Add TAIL to overlays_after before OTHER. */ | |
2369 | XCONS (tail)->cdr = other; | |
2370 | if (!NILP (other_prev)) | |
2371 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 2372 | else |
5c4f68f1 | 2373 | buf->overlays_after = tail; |
2eec3b4e | 2374 | tail = prev; |
1ab256cb | 2375 | } |
2eec3b4e RS |
2376 | else |
2377 | /* We've reached the things that should stay in overlays_before. | |
2378 | All the rest of overlays_before must end even earlier, | |
2379 | so stop now. */ | |
2380 | break; | |
2381 | } | |
2382 | ||
2383 | /* See if anything in overlays_after should be in overlays_before. */ | |
2384 | prev = Qnil; | |
5c4f68f1 | 2385 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2386 | CONSP (tail); |
2387 | prev = tail, tail = next) | |
2388 | { | |
2389 | next = XCONS (tail)->cdr; | |
2390 | overlay = XCONS (tail)->car; | |
2391 | ||
2392 | /* If the overlay is not valid, get rid of it. */ | |
2393 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2394 | #if 1 |
2395 | abort (); | |
2396 | #else | |
2eec3b4e RS |
2397 | { |
2398 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2399 | if (!NILP (prev)) | |
2400 | XCONS (prev)->cdr = next; | |
2401 | else | |
5c4f68f1 | 2402 | buf->overlays_after = next; |
2eec3b4e RS |
2403 | tail = prev; |
2404 | continue; | |
2405 | } | |
52f8ec73 | 2406 | #endif |
2eec3b4e RS |
2407 | |
2408 | beg = OVERLAY_START (overlay); | |
2409 | end = OVERLAY_END (overlay); | |
2410 | ||
2411 | /* Stop looking, when we know that nothing further | |
2412 | can possibly end before POS. */ | |
2413 | if (OVERLAY_POSITION (beg) > pos) | |
2414 | break; | |
2415 | ||
2416 | if (OVERLAY_POSITION (end) <= pos) | |
2417 | { | |
2418 | /* OVERLAY needs to be moved. */ | |
2419 | int where = OVERLAY_POSITION (end); | |
2420 | Lisp_Object other, other_prev; | |
2421 | ||
2422 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2423 | if (!NILP (prev)) | |
2424 | XCONS (prev)->cdr = next; | |
2425 | else | |
5c4f68f1 | 2426 | buf->overlays_after = next; |
2eec3b4e RS |
2427 | |
2428 | /* Search thru overlays_before for where to put it. */ | |
2429 | other_prev = Qnil; | |
5c4f68f1 | 2430 | for (other = buf->overlays_before; |
2eec3b4e RS |
2431 | CONSP (other); |
2432 | other_prev = other, other = XCONS (other)->cdr) | |
2433 | { | |
2434 | Lisp_Object otherend, otheroverlay; | |
2435 | int win; | |
2436 | ||
2437 | otheroverlay = XCONS (other)->car; | |
2438 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2439 | abort (); |
2eec3b4e RS |
2440 | |
2441 | otherend = OVERLAY_END (otheroverlay); | |
2442 | if (OVERLAY_POSITION (otherend) <= where) | |
2443 | break; | |
2444 | } | |
2445 | ||
2446 | /* Add TAIL to overlays_before before OTHER. */ | |
2447 | XCONS (tail)->cdr = other; | |
2448 | if (!NILP (other_prev)) | |
2449 | XCONS (other_prev)->cdr = tail; | |
2450 | else | |
5c4f68f1 | 2451 | buf->overlays_before = tail; |
2eec3b4e RS |
2452 | tail = prev; |
2453 | } | |
2454 | } | |
2455 | ||
8d7a4592 | 2456 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 2457 | } |
2b1bdf65 | 2458 | |
423cdb46 KH |
2459 | void |
2460 | adjust_overlays_for_insert (pos, length) | |
2461 | int pos; | |
2462 | int length; | |
2463 | { | |
2464 | /* After an insertion, the lists are still sorted properly, | |
2465 | but we may need to update the value of the overlay center. */ | |
2466 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
2467 | XSETFASTINT (current_buffer->overlay_center, | |
2468 | XFASTINT (current_buffer->overlay_center) + length); | |
2469 | } | |
2470 | ||
2471 | void | |
2472 | adjust_overlays_for_delete (pos, length) | |
2473 | int pos; | |
2474 | int length; | |
2475 | { | |
2476 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
2477 | /* The deletion was to our right. No change needed; the before- and | |
2478 | after-lists are still consistent. */ | |
2479 | ; | |
2480 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
2481 | /* The deletion was to our left. We need to adjust the center value | |
2482 | to account for the change in position, but the lists are consistent | |
2483 | given the new value. */ | |
2484 | XSETFASTINT (current_buffer->overlay_center, | |
2485 | XFASTINT (current_buffer->overlay_center) - length); | |
2486 | else | |
2487 | /* We're right in the middle. There might be things on the after-list | |
2488 | that now belong on the before-list. Recentering will move them, | |
2489 | and also update the center point. */ | |
2490 | recenter_overlay_lists (current_buffer, pos); | |
2491 | } | |
2492 | ||
2b1bdf65 KH |
2493 | /* Fix up overlays that were garbled as a result of permuting markers |
2494 | in the range START through END. Any overlay with at least one | |
2495 | endpoint in this range will need to be unlinked from the overlay | |
2496 | list and reinserted in its proper place. | |
2497 | Such an overlay might even have negative size at this point. | |
2498 | If so, we'll reverse the endpoints. Can you think of anything | |
2499 | better to do in this situation? */ | |
2500 | void | |
2501 | fix_overlays_in_range (start, end) | |
2502 | register int start, end; | |
2503 | { | |
2504 | Lisp_Object tem, overlay; | |
2505 | Lisp_Object before_list, after_list; | |
2506 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2507 | int startpos, endpos; | |
2508 | ||
2509 | /* This algorithm shifts links around instead of consing and GCing. | |
2510 | The loop invariant is that before_list (resp. after_list) is a | |
2511 | well-formed list except that its last element, the one that | |
2512 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2513 | So it's not a bug that before_list isn't initialized, although | |
2514 | it may look strange. */ | |
2515 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2516 | { | |
2517 | overlay = XCONS (*ptail)->car; | |
2518 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2519 | if (endpos < start) | |
2520 | break; | |
2521 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2522 | if (endpos < end | |
2523 | || (startpos >= start && startpos < end)) | |
2524 | { | |
2525 | /* If the overlay is backwards, fix that now. */ | |
2526 | if (startpos > endpos) | |
2527 | { | |
2528 | int tem; | |
2529 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2530 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2531 | tem = startpos; startpos = endpos; endpos = tem; | |
2532 | } | |
2533 | /* Add it to the end of the wrong list. Later on, | |
2534 | recenter_overlay_lists will move it to the right place. */ | |
2535 | if (endpos < XINT (current_buffer->overlay_center)) | |
2536 | { | |
2537 | *pafter = *ptail; | |
2538 | pafter = &XCONS (*ptail)->cdr; | |
2539 | } | |
2540 | else | |
2541 | { | |
2542 | *pbefore = *ptail; | |
2543 | pbefore = &XCONS (*ptail)->cdr; | |
2544 | } | |
2545 | *ptail = XCONS (*ptail)->cdr; | |
2546 | } | |
2547 | else | |
2548 | ptail = &XCONS (*ptail)->cdr; | |
2549 | } | |
2550 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2551 | { | |
2552 | overlay = XCONS (*ptail)->car; | |
2553 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2554 | if (startpos >= end) | |
2555 | break; | |
2556 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2557 | if (startpos >= start | |
2558 | || (endpos >= start && endpos < end)) | |
2559 | { | |
2560 | if (startpos > endpos) | |
2561 | { | |
2562 | int tem; | |
2563 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2564 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2565 | tem = startpos; startpos = endpos; endpos = tem; | |
2566 | } | |
2567 | if (endpos < XINT (current_buffer->overlay_center)) | |
2568 | { | |
2569 | *pafter = *ptail; | |
2570 | pafter = &XCONS (*ptail)->cdr; | |
2571 | } | |
2572 | else | |
2573 | { | |
2574 | *pbefore = *ptail; | |
2575 | pbefore = &XCONS (*ptail)->cdr; | |
2576 | } | |
2577 | *ptail = XCONS (*ptail)->cdr; | |
2578 | } | |
2579 | else | |
2580 | ptail = &XCONS (*ptail)->cdr; | |
2581 | } | |
2582 | ||
2583 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2584 | and let the recenter function make it sane again. */ | |
2585 | *pbefore = current_buffer->overlays_before; | |
2586 | current_buffer->overlays_before = before_list; | |
2587 | recenter_overlay_lists (current_buffer, | |
2588 | XINT (current_buffer->overlay_center)); | |
2589 | ||
2590 | *pafter = current_buffer->overlays_after; | |
2591 | current_buffer->overlays_after = after_list; | |
2592 | recenter_overlay_lists (current_buffer, | |
2593 | XINT (current_buffer->overlay_center)); | |
2594 | } | |
3b06f880 KH |
2595 | |
2596 | /* We have two types of overlay: the one whose ending marker is | |
2597 | after-insertion-marker (this is the usual case) and the one whose | |
2598 | ending marker is before-insertion-marker. When `overlays_before' | |
2599 | contains overlays of the latter type and the former type in this | |
2600 | order and both overlays end at inserting position, inserting a text | |
2601 | increases only the ending marker of the latter type, which results | |
2602 | in incorrect ordering of `overlays_before'. | |
2603 | ||
2604 | This function fixes ordering of overlays in the slot | |
2605 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
2606 | was at PREV, and now is at POS. */ | |
2607 | ||
2608 | fix_overlays_before (bp, prev, pos) | |
2609 | struct buffer *bp; | |
2610 | int prev, pos; | |
2611 | { | |
2612 | Lisp_Object *tailp = &bp->overlays_before; | |
2613 | Lisp_Object *right_place; | |
2614 | int end; | |
2615 | ||
2616 | /* After the insertion, the several overlays may be in incorrect | |
2617 | order. The possibility is that, in the list `overlays_before', | |
2618 | an overlay which ends at POS appears after an overlay which ends | |
2619 | at PREV. Since POS is greater than PREV, we must fix the | |
2620 | ordering of these overlays, by moving overlays ends at POS before | |
2621 | the overlays ends at PREV. */ | |
2622 | ||
2623 | /* At first, find a place where disordered overlays should be linked | |
2624 | in. It is where an overlay which end before POS exists. (i.e. an | |
2625 | overlay whose ending marker is after-insertion-marker if disorder | |
2626 | exists). */ | |
2627 | while (!NILP (*tailp) | |
2628 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car))) | |
2629 | >= pos)) | |
2630 | tailp = &XCONS (*tailp)->cdr; | |
2631 | ||
2632 | /* If we don't find such an overlay, | |
2633 | or the found one ends before PREV, | |
2634 | or the found one is the last one in the list, | |
2635 | we don't have to fix anything. */ | |
2636 | if (NILP (*tailp) | |
2637 | || end < prev | |
2638 | || NILP (XCONS (*tailp)->cdr)) | |
2639 | return; | |
2640 | ||
2641 | right_place = tailp; | |
2642 | tailp = &XCONS (*tailp)->cdr; | |
2643 | ||
2644 | /* Now, end position of overlays in the list *TAILP should be before | |
2645 | or equal to PREV. In the loop, an overlay which ends at POS is | |
2646 | moved ahead to the place pointed by RIGHT_PLACE. If we found an | |
2647 | overlay which ends before PREV, the remaining overlays are in | |
2648 | correct order. */ | |
2649 | while (!NILP (*tailp)) | |
2650 | { | |
2651 | end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car)); | |
2652 | ||
2653 | if (end == pos) | |
2654 | { /* This overlay is disordered. */ | |
2655 | Lisp_Object found = *tailp; | |
2656 | ||
2657 | /* Unlink the found overlay. */ | |
2658 | *tailp = XCONS (found)->cdr; | |
2659 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ | |
2660 | XCONS (found)->cdr = *right_place; | |
2661 | /* Link it into the right place. */ | |
2662 | *right_place = found; | |
2663 | } | |
2664 | else if (end == prev) | |
2665 | tailp = &XCONS (*tailp)->cdr; | |
2666 | else /* No more disordered overlay. */ | |
2667 | break; | |
2668 | } | |
2669 | } | |
2eec3b4e | 2670 | \f |
52f8ec73 JB |
2671 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
2672 | "Return t if OBJECT is an overlay.") | |
2673 | (object) | |
2674 | Lisp_Object object; | |
2675 | { | |
2676 | return (OVERLAYP (object) ? Qt : Qnil); | |
2677 | } | |
2678 | ||
acac2700 | 2679 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
2680 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
2681 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
2682 | BEG and END may be integers or markers.\n\ |
2683 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
2684 | front delimiter advance when text is inserted there.\n\ | |
2685 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
2686 | rear delimiter advance when text is inserted there.") | |
2687 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 2688 | Lisp_Object beg, end, buffer; |
acac2700 | 2689 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
2690 | { |
2691 | Lisp_Object overlay; | |
5c4f68f1 | 2692 | struct buffer *b; |
2eec3b4e | 2693 | |
5c4f68f1 | 2694 | if (NILP (buffer)) |
67180c6a | 2695 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
2696 | else |
2697 | CHECK_BUFFER (buffer, 2); | |
2698 | if (MARKERP (beg) | |
2699 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2700 | error ("Marker points into wrong buffer"); | |
2701 | if (MARKERP (end) | |
2702 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2703 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 2704 | |
883047b9 JB |
2705 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2706 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2707 | |
883047b9 | 2708 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2709 | { |
c99fc30f KH |
2710 | Lisp_Object temp; |
2711 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2712 | } |
883047b9 JB |
2713 | |
2714 | b = XBUFFER (buffer); | |
2715 | ||
2716 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2717 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2718 | |
acac2700 RS |
2719 | if (!NILP (front_advance)) |
2720 | XMARKER (beg)->insertion_type = 1; | |
2721 | if (!NILP (rear_advance)) | |
2722 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 2723 | |
48e2e3ba | 2724 | overlay = allocate_misc (); |
89ca3e1b | 2725 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
2726 | XOVERLAY (overlay)->start = beg; |
2727 | XOVERLAY (overlay)->end = end; | |
2728 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2729 | |
2730 | /* Put the new overlay on the wrong list. */ | |
2731 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2732 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2733 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2734 | else |
5c4f68f1 | 2735 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2736 | |
2737 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2738 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2739 | |
b61982dd JB |
2740 | /* We don't need to redisplay the region covered by the overlay, because |
2741 | the overlay has no properties at the moment. */ | |
2742 | ||
2eec3b4e RS |
2743 | return overlay; |
2744 | } | |
876aa27c RS |
2745 | \f |
2746 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
2747 | ||
2748 | static void | |
2749 | modify_overlay (buf, start, end) | |
2750 | struct buffer *buf; | |
2751 | int start, end; | |
2752 | { | |
2753 | if (start == end) | |
2754 | return; | |
2755 | ||
2756 | if (start > end) | |
2757 | { | |
2758 | int temp = start; | |
2759 | start = end; end = temp; | |
2760 | } | |
2761 | ||
2762 | /* If this is a buffer not in the selected window, | |
2763 | we must do other windows. */ | |
2764 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
2765 | windows_or_buffers_changed = 1; | |
2766 | /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */ | |
2767 | else if (buf != current_buffer) | |
2768 | windows_or_buffers_changed = 1; | |
2769 | /* If multiple windows show this buffer, we must do other windows. */ | |
2770 | else if (buffer_shared > 1) | |
2771 | windows_or_buffers_changed = 1; | |
2772 | else | |
2773 | { | |
2774 | if (unchanged_modified == MODIFF | |
2775 | && overlay_unchanged_modified == OVERLAY_MODIFF) | |
2776 | { | |
2777 | beg_unchanged = start - BEG; | |
2778 | end_unchanged = Z - end; | |
2779 | } | |
2780 | else | |
2781 | { | |
2782 | if (Z - end < end_unchanged) | |
2783 | end_unchanged = Z - end; | |
2784 | if (start - BEG < beg_unchanged) | |
2785 | beg_unchanged = start - BEG; | |
2786 | } | |
2787 | } | |
2788 | ||
2789 | ++OVERLAY_MODIFF; | |
2790 | } | |
2eec3b4e | 2791 | |
876aa27c | 2792 | \f\f |
5c4f68f1 JB |
2793 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2794 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2795 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2796 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2797 | buffer.") | |
5c4f68f1 JB |
2798 | (overlay, beg, end, buffer) |
2799 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2800 | { |
0a4469c9 RS |
2801 | struct buffer *b, *ob; |
2802 | Lisp_Object obuffer; | |
2803 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2804 | |
52f8ec73 | 2805 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2806 | if (NILP (buffer)) |
2807 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2808 | if (NILP (buffer)) |
67180c6a | 2809 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2810 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2811 | |
2812 | if (MARKERP (beg) | |
2813 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2814 | error ("Marker points into wrong buffer"); | |
2815 | if (MARKERP (end) | |
2816 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2817 | error ("Marker points into wrong buffer"); | |
2818 | ||
b61982dd JB |
2819 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2820 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2821 | ||
9d7608b7 KH |
2822 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2823 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2824 | |
b61982dd JB |
2825 | if (XINT (beg) > XINT (end)) |
2826 | { | |
c99fc30f KH |
2827 | Lisp_Object temp; |
2828 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2829 | } |
2830 | ||
9d7608b7 KH |
2831 | specbind (Qinhibit_quit, Qt); |
2832 | ||
0a4469c9 | 2833 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2834 | b = XBUFFER (buffer); |
0a4469c9 | 2835 | ob = XBUFFER (obuffer); |
2eec3b4e | 2836 | |
c82ed728 | 2837 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2838 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2839 | { |
2840 | /* Redisplay where the overlay was. */ | |
2841 | if (!NILP (obuffer)) | |
2842 | { | |
2843 | Lisp_Object o_beg; | |
2844 | Lisp_Object o_end; | |
2845 | ||
80509f2f RS |
2846 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2847 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 2848 | |
876aa27c | 2849 | modify_overlay (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2850 | } |
2851 | ||
2852 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 2853 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 2854 | } |
c82ed728 JB |
2855 | else |
2856 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2857 | { | |
be8b1c6b RS |
2858 | Lisp_Object o_beg; |
2859 | Lisp_Object o_end; | |
c82ed728 JB |
2860 | int change_beg, change_end; |
2861 | ||
80509f2f RS |
2862 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2863 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 JB |
2864 | |
2865 | if (XINT (o_beg) == XINT (beg)) | |
876aa27c | 2866 | modify_overlay (b, XINT (o_end), XINT (end)); |
c82ed728 | 2867 | else if (XINT (o_end) == XINT (end)) |
876aa27c | 2868 | modify_overlay (b, XINT (o_beg), XINT (beg)); |
c82ed728 JB |
2869 | else |
2870 | { | |
2871 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2872 | if (XINT (end) > XINT (o_end)) o_end = end; | |
876aa27c | 2873 | modify_overlay (b, XINT (o_beg), XINT (o_end)); |
c82ed728 JB |
2874 | } |
2875 | } | |
b61982dd | 2876 | |
0a4469c9 RS |
2877 | if (!NILP (obuffer)) |
2878 | { | |
2879 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2880 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2881 | } | |
5c4f68f1 JB |
2882 | |
2883 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2884 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2885 | |
2886 | /* Put the overlay on the wrong list. */ | |
2887 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2888 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2889 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2890 | else |
5c4f68f1 | 2891 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2892 | |
2893 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2894 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2895 | |
0a4469c9 | 2896 | return unbind_to (count, overlay); |
2eec3b4e RS |
2897 | } |
2898 | ||
2899 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2900 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2901 | (overlay) |
5c4f68f1 | 2902 | Lisp_Object overlay; |
2eec3b4e | 2903 | { |
0a4469c9 | 2904 | Lisp_Object buffer; |
5c4f68f1 | 2905 | struct buffer *b; |
0a4469c9 | 2906 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2907 | |
52f8ec73 JB |
2908 | CHECK_OVERLAY (overlay, 0); |
2909 | ||
0a4469c9 RS |
2910 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2911 | if (NILP (buffer)) | |
2912 | return Qnil; | |
2913 | ||
2914 | b = XBUFFER (buffer); | |
2915 | ||
2916 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2917 | |
2918 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2919 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2920 | ||
876aa27c | 2921 | modify_overlay (b, |
a927f5c9 RS |
2922 | marker_position (OVERLAY_START (overlay)), |
2923 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2924 | |
3ece337a JB |
2925 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2926 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2927 | ||
0a4469c9 | 2928 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2929 | } |
2930 | \f | |
8ebafa8d JB |
2931 | /* Overlay dissection functions. */ |
2932 | ||
2933 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2934 | "Return the position at which OVERLAY starts.") | |
2935 | (overlay) | |
2936 | Lisp_Object overlay; | |
2937 | { | |
2938 | CHECK_OVERLAY (overlay, 0); | |
2939 | ||
2940 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2941 | } | |
2942 | ||
2943 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2944 | "Return the position at which OVERLAY ends.") | |
2945 | (overlay) | |
2946 | Lisp_Object overlay; | |
2947 | { | |
2948 | CHECK_OVERLAY (overlay, 0); | |
2949 | ||
2950 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2951 | } | |
2952 | ||
2953 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2954 | "Return the buffer OVERLAY belongs to.") | |
2955 | (overlay) | |
2956 | Lisp_Object overlay; | |
2957 | { | |
2958 | CHECK_OVERLAY (overlay, 0); | |
2959 | ||
2960 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2961 | } | |
2962 | ||
2963 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2964 | "Return a list of the properties on OVERLAY.\n\ | |
2965 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2966 | OVERLAY.") | |
2967 | (overlay) | |
2968 | Lisp_Object overlay; | |
2969 | { | |
2970 | CHECK_OVERLAY (overlay, 0); | |
2971 | ||
48e2e3ba | 2972 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2973 | } |
2974 | ||
2975 | \f | |
2eec3b4e | 2976 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2977 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2978 | (pos) |
2979 | Lisp_Object pos; | |
2980 | { | |
2981 | int noverlays; | |
2eec3b4e RS |
2982 | Lisp_Object *overlay_vec; |
2983 | int len; | |
2984 | Lisp_Object result; | |
2985 | ||
2986 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2987 | ||
2988 | len = 10; | |
2989 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2990 | ||
2991 | /* Put all the overlays we want in a vector in overlay_vec. | |
2992 | Store the length in len. */ | |
2a77a7d7 RS |
2993 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2994 | (int *) 0, (int *) 0); | |
2eec3b4e RS |
2995 | |
2996 | /* Make a list of them all. */ | |
2997 | result = Flist (noverlays, overlay_vec); | |
2998 | ||
9ac0d9e0 | 2999 | xfree (overlay_vec); |
2eec3b4e RS |
3000 | return result; |
3001 | } | |
3002 | ||
74514898 | 3003 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
3004 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
3005 | Overlap means that at least one character is contained within the overlay\n\ | |
3006 | and also contained within the specified region.\n\ | |
3007 | Empty overlays are included in the result if they are located at BEG\n\ | |
3008 | or between BEG and END.") | |
74514898 RS |
3009 | (beg, end) |
3010 | Lisp_Object beg, end; | |
3011 | { | |
3012 | int noverlays; | |
3013 | Lisp_Object *overlay_vec; | |
3014 | int len; | |
3015 | Lisp_Object result; | |
3016 | ||
3017 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
3018 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
3019 | ||
3020 | len = 10; | |
3021 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3022 | ||
3023 | /* Put all the overlays we want in a vector in overlay_vec. | |
3024 | Store the length in len. */ | |
3025 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3026 | (int *) 0, (int *) 0); | |
3027 | ||
3028 | /* Make a list of them all. */ | |
3029 | result = Flist (noverlays, overlay_vec); | |
3030 | ||
3031 | xfree (overlay_vec); | |
3032 | return result; | |
3033 | } | |
3034 | ||
2eec3b4e RS |
3035 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
3036 | 1, 1, 0, | |
bbe20e81 KH |
3037 | "Return the next position after POS where an overlay starts or ends.\n\ |
3038 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
3039 | (pos) |
3040 | Lisp_Object pos; | |
3041 | { | |
3042 | int noverlays; | |
3043 | int endpos; | |
3044 | Lisp_Object *overlay_vec; | |
3045 | int len; | |
2eec3b4e RS |
3046 | int i; |
3047 | ||
3048 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3049 | ||
3050 | len = 10; | |
3051 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3052 | ||
3053 | /* Put all the overlays we want in a vector in overlay_vec. | |
3054 | Store the length in len. | |
3055 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 RS |
3056 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3057 | &endpos, (int *) 0); | |
2eec3b4e RS |
3058 | |
3059 | /* If any of these overlays ends before endpos, | |
3060 | use its ending point instead. */ | |
3061 | for (i = 0; i < noverlays; i++) | |
3062 | { | |
3063 | Lisp_Object oend; | |
3064 | int oendpos; | |
3065 | ||
3066 | oend = OVERLAY_END (overlay_vec[i]); | |
3067 | oendpos = OVERLAY_POSITION (oend); | |
3068 | if (oendpos < endpos) | |
3069 | endpos = oendpos; | |
1ab256cb RM |
3070 | } |
3071 | ||
9ac0d9e0 | 3072 | xfree (overlay_vec); |
2eec3b4e RS |
3073 | return make_number (endpos); |
3074 | } | |
239c932b RS |
3075 | |
3076 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3077 | Sprevious_overlay_change, 1, 1, 0, | |
3078 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 3079 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
3080 | (pos) |
3081 | Lisp_Object pos; | |
3082 | { | |
3083 | int noverlays; | |
3084 | int prevpos; | |
3085 | Lisp_Object *overlay_vec; | |
3086 | int len; | |
3087 | int i; | |
624bbdc4 | 3088 | Lisp_Object tail; |
239c932b RS |
3089 | |
3090 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3091 | ||
3092 | len = 10; | |
3093 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3094 | ||
624bbdc4 RS |
3095 | /* At beginning of buffer, we know the answer; |
3096 | avoid bug subtracting 1 below. */ | |
3097 | if (XINT (pos) == BEGV) | |
3098 | return pos; | |
3099 | ||
239c932b RS |
3100 | /* Put all the overlays we want in a vector in overlay_vec. |
3101 | Store the length in len. | |
3102 | prevpos gets the position of an overlay end. */ | |
2a77a7d7 RS |
3103 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3104 | (int *) 0, &prevpos); | |
239c932b | 3105 | |
624bbdc4 | 3106 | /* If any of these overlays starts after prevpos, |
239c932b RS |
3107 | maybe use its starting point instead. */ |
3108 | for (i = 0; i < noverlays; i++) | |
3109 | { | |
3110 | Lisp_Object ostart; | |
3111 | int ostartpos; | |
3112 | ||
3113 | ostart = OVERLAY_START (overlay_vec[i]); | |
3114 | ostartpos = OVERLAY_POSITION (ostart); | |
3115 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
3116 | prevpos = ostartpos; | |
3117 | } | |
3118 | ||
624bbdc4 RS |
3119 | /* If any overlay ends at pos, consider its starting point too. */ |
3120 | for (tail = current_buffer->overlays_before; | |
3121 | GC_CONSP (tail); | |
3122 | tail = XCONS (tail)->cdr) | |
3123 | { | |
3124 | Lisp_Object overlay, ostart; | |
3125 | int ostartpos; | |
3126 | ||
3127 | overlay = XCONS (tail)->car; | |
3128 | ||
3129 | ostart = OVERLAY_START (overlay); | |
3130 | ostartpos = OVERLAY_POSITION (ostart); | |
3131 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
3132 | prevpos = ostartpos; | |
3133 | } | |
3134 | ||
239c932b RS |
3135 | xfree (overlay_vec); |
3136 | return make_number (prevpos); | |
3137 | } | |
2eec3b4e RS |
3138 | \f |
3139 | /* These functions are for debugging overlays. */ | |
3140 | ||
3141 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
3142 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
3143 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 3144 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
3145 | Recentering overlays moves overlays between these lists.\n\ |
3146 | The lists you get are copies, so that changing them has no effect.\n\ | |
3147 | However, the overlays you get are the real objects that the buffer uses.") | |
3148 | () | |
3149 | { | |
3150 | Lisp_Object before, after; | |
3151 | before = current_buffer->overlays_before; | |
3152 | if (CONSP (before)) | |
3153 | before = Fcopy_sequence (before); | |
3154 | after = current_buffer->overlays_after; | |
3155 | if (CONSP (after)) | |
3156 | after = Fcopy_sequence (after); | |
3157 | ||
3158 | return Fcons (before, after); | |
3159 | } | |
3160 | ||
3161 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3162 | "Recenter the overlays of the current buffer around position POS.") | |
3163 | (pos) | |
3164 | Lisp_Object pos; | |
3165 | { | |
3166 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3167 | ||
5c4f68f1 | 3168 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3169 | return Qnil; |
3170 | } | |
3171 | \f | |
3172 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3173 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3174 | (overlay, prop) |
3175 | Lisp_Object overlay, prop; | |
3176 | { | |
cab4777e | 3177 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3178 | |
3179 | CHECK_OVERLAY (overlay, 0); | |
3180 | ||
cab4777e RS |
3181 | fallback = Qnil; |
3182 | ||
48e2e3ba | 3183 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3184 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
3185 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
3186 | { | |
3187 | if (EQ (XCONS (plist)->car, prop)) | |
3188 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
3189 | else if (EQ (XCONS (plist)->car, Qcategory)) |
3190 | { | |
3191 | Lisp_Object tem; | |
3192 | tem = Fcar (Fcdr (plist)); | |
3193 | if (SYMBOLP (tem)) | |
3194 | fallback = Fget (tem, prop); | |
3195 | } | |
2eec3b4e | 3196 | } |
52f8ec73 | 3197 | |
cab4777e | 3198 | return fallback; |
2eec3b4e RS |
3199 | } |
3200 | ||
3201 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3202 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3203 | (overlay, prop, value) | |
3204 | Lisp_Object overlay, prop, value; | |
3205 | { | |
48e2e3ba | 3206 | Lisp_Object tail, buffer; |
9d7608b7 | 3207 | int changed; |
2eec3b4e | 3208 | |
52f8ec73 | 3209 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3210 | |
274a9425 RS |
3211 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3212 | ||
48e2e3ba | 3213 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3214 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
3215 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
3216 | if (EQ (XCONS (tail)->car, prop)) |
3217 | { | |
9d7608b7 KH |
3218 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
3219 | XCONS (XCONS (tail)->cdr)->car = value; | |
3220 | goto found; | |
274a9425 | 3221 | } |
9d7608b7 KH |
3222 | /* It wasn't in the list, so add it to the front. */ |
3223 | changed = !NILP (value); | |
48e2e3ba KH |
3224 | XOVERLAY (overlay)->plist |
3225 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3226 | found: |
3227 | if (! NILP (buffer)) | |
3228 | { | |
3229 | if (changed) | |
876aa27c | 3230 | modify_overlay (XBUFFER (buffer), |
9d7608b7 KH |
3231 | marker_position (OVERLAY_START (overlay)), |
3232 | marker_position (OVERLAY_END (overlay))); | |
3233 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3234 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3235 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3236 | Fdelete_overlay (overlay); | |
3237 | } | |
2eec3b4e | 3238 | return value; |
1ab256cb RM |
3239 | } |
3240 | \f | |
9115729e KH |
3241 | /* Subroutine of report_overlay_modification. */ |
3242 | ||
3243 | /* Lisp vector holding overlay hook functions to call. | |
3244 | Vector elements come in pairs. | |
3245 | Each even-index element is a list of hook functions. | |
3246 | The following odd-index element is the overlay they came from. | |
3247 | ||
3248 | Before the buffer change, we fill in this vector | |
3249 | as we call overlay hook functions. | |
3250 | After the buffer change, we get the functions to call from this vector. | |
3251 | This way we always call the same functions before and after the change. */ | |
3252 | static Lisp_Object last_overlay_modification_hooks; | |
3253 | ||
3254 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3255 | static int last_overlay_modification_hooks_used; | |
3256 | ||
3257 | /* Add one functionlist/overlay pair | |
3258 | to the end of last_overlay_modification_hooks. */ | |
3259 | ||
3260 | static void | |
3261 | add_overlay_mod_hooklist (functionlist, overlay) | |
3262 | Lisp_Object functionlist, overlay; | |
3263 | { | |
3264 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3265 | ||
3266 | if (last_overlay_modification_hooks_used == oldsize) | |
3267 | { | |
3268 | Lisp_Object old; | |
3269 | old = last_overlay_modification_hooks; | |
3270 | last_overlay_modification_hooks | |
3271 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3272 | bcopy (XVECTOR (old)->contents, |
3273 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3274 | sizeof (Lisp_Object) * oldsize); |
3275 | } | |
3276 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3277 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3278 | } | |
3279 | \f | |
173f2a64 RS |
3280 | /* Run the modification-hooks of overlays that include |
3281 | any part of the text in START to END. | |
9115729e KH |
3282 | If this change is an insertion, also |
3283 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3284 | and the insert-after-hooks of overlay ending at START. |
3285 | ||
3286 | This is called both before and after the modification. | |
3287 | AFTER is nonzero when we call after the modification. | |
3288 | ||
9115729e KH |
3289 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3290 | When AFTER is nonzero, they are the start position, | |
3291 | the position after the inserted new text, | |
3292 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3293 | |
3294 | void | |
930a9140 | 3295 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3296 | Lisp_Object start, end; |
930a9140 RS |
3297 | int after; |
3298 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3299 | { |
3300 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3301 | /* 1 if this change is an insertion. */ |
3302 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3303 | int tail_copied; |
930a9140 | 3304 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3305 | |
3306 | overlay = Qnil; | |
3307 | tail = Qnil; | |
930a9140 | 3308 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3309 | |
9115729e KH |
3310 | if (after) |
3311 | { | |
3312 | /* Call the functions recorded in last_overlay_modification_hooks | |
3313 | rather than scanning the overlays again. | |
3314 | First copy the vector contents, in case some of these hooks | |
3315 | do subsequent modification of the buffer. */ | |
3316 | int size = last_overlay_modification_hooks_used; | |
3317 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3318 | int i; | |
3319 | ||
3320 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3321 | copy, size * sizeof (Lisp_Object)); | |
3322 | gcpro1.var = copy; | |
3323 | gcpro1.nvars = size; | |
3324 | ||
3325 | for (i = 0; i < size;) | |
3326 | { | |
3327 | Lisp_Object prop, overlay; | |
3328 | prop = copy[i++]; | |
3329 | overlay = copy[i++]; | |
3330 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3331 | } | |
3332 | UNGCPRO; | |
3333 | return; | |
3334 | } | |
3335 | ||
3336 | /* We are being called before a change. | |
3337 | Scan the overlays to find the functions to call. */ | |
3338 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3339 | tail_copied = 0; |
173f2a64 RS |
3340 | for (tail = current_buffer->overlays_before; |
3341 | CONSP (tail); | |
3342 | tail = XCONS (tail)->cdr) | |
3343 | { | |
3344 | int startpos, endpos; | |
be8b1c6b | 3345 | Lisp_Object ostart, oend; |
173f2a64 RS |
3346 | |
3347 | overlay = XCONS (tail)->car; | |
3348 | ||
3349 | ostart = OVERLAY_START (overlay); | |
3350 | oend = OVERLAY_END (overlay); | |
3351 | endpos = OVERLAY_POSITION (oend); | |
3352 | if (XFASTINT (start) > endpos) | |
3353 | break; | |
3354 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3355 | if (insertion && (XFASTINT (start) == startpos |
3356 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3357 | { |
3358 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3359 | if (!NILP (prop)) |
3360 | { | |
3361 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3362 | if (!tail_copied) |
3363 | tail = Fcopy_sequence (tail); | |
3364 | tail_copied = 1; | |
930a9140 | 3365 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3366 | } |
173f2a64 | 3367 | } |
9115729e KH |
3368 | if (insertion && (XFASTINT (start) == endpos |
3369 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3370 | { |
3371 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3372 | if (!NILP (prop)) |
3373 | { | |
55b48893 RS |
3374 | if (!tail_copied) |
3375 | tail = Fcopy_sequence (tail); | |
3376 | tail_copied = 1; | |
930a9140 | 3377 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3378 | } |
173f2a64 | 3379 | } |
3bd13e92 KH |
3380 | /* Test for intersecting intervals. This does the right thing |
3381 | for both insertion and deletion. */ | |
3382 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3383 | { |
3384 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3385 | if (!NILP (prop)) |
3386 | { | |
55b48893 RS |
3387 | if (!tail_copied) |
3388 | tail = Fcopy_sequence (tail); | |
3389 | tail_copied = 1; | |
930a9140 | 3390 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3391 | } |
173f2a64 RS |
3392 | } |
3393 | } | |
3394 | ||
55b48893 | 3395 | tail_copied = 0; |
173f2a64 RS |
3396 | for (tail = current_buffer->overlays_after; |
3397 | CONSP (tail); | |
3398 | tail = XCONS (tail)->cdr) | |
3399 | { | |
3400 | int startpos, endpos; | |
be8b1c6b | 3401 | Lisp_Object ostart, oend; |
173f2a64 RS |
3402 | |
3403 | overlay = XCONS (tail)->car; | |
3404 | ||
3405 | ostart = OVERLAY_START (overlay); | |
3406 | oend = OVERLAY_END (overlay); | |
3407 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3408 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3409 | if (XFASTINT (end) < startpos) |
3410 | break; | |
9115729e KH |
3411 | if (insertion && (XFASTINT (start) == startpos |
3412 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3413 | { |
3414 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3415 | if (!NILP (prop)) |
3416 | { | |
55b48893 RS |
3417 | if (!tail_copied) |
3418 | tail = Fcopy_sequence (tail); | |
3419 | tail_copied = 1; | |
930a9140 | 3420 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3421 | } |
173f2a64 | 3422 | } |
9115729e KH |
3423 | if (insertion && (XFASTINT (start) == endpos |
3424 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3425 | { |
3426 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3427 | if (!NILP (prop)) |
3428 | { | |
55b48893 RS |
3429 | if (!tail_copied) |
3430 | tail = Fcopy_sequence (tail); | |
3431 | tail_copied = 1; | |
930a9140 | 3432 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3433 | } |
173f2a64 | 3434 | } |
3bd13e92 KH |
3435 | /* Test for intersecting intervals. This does the right thing |
3436 | for both insertion and deletion. */ | |
3437 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3438 | { |
3439 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3440 | if (!NILP (prop)) |
3441 | { | |
55b48893 RS |
3442 | if (!tail_copied) |
3443 | tail = Fcopy_sequence (tail); | |
3444 | tail_copied = 1; | |
930a9140 | 3445 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3446 | } |
173f2a64 RS |
3447 | } |
3448 | } | |
55b48893 RS |
3449 | |
3450 | UNGCPRO; | |
173f2a64 RS |
3451 | } |
3452 | ||
3453 | static void | |
930a9140 RS |
3454 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3455 | Lisp_Object list, overlay; | |
3456 | int after; | |
3457 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3458 | { |
930a9140 | 3459 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3460 | |
930a9140 | 3461 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3462 | if (! after) |
3463 | add_overlay_mod_hooklist (list, overlay); | |
3464 | ||
173f2a64 RS |
3465 | while (!NILP (list)) |
3466 | { | |
930a9140 RS |
3467 | if (NILP (arg3)) |
3468 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3469 | else | |
3470 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3471 | list = Fcdr (list); |
3472 | } | |
3473 | UNGCPRO; | |
3474 | } | |
9d7608b7 KH |
3475 | |
3476 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3477 | property is set. */ | |
3478 | void | |
3479 | evaporate_overlays (pos) | |
3480 | int pos; | |
3481 | { | |
3482 | Lisp_Object tail, overlay, hit_list; | |
3483 | ||
3484 | hit_list = Qnil; | |
3485 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
3486 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
3487 | tail = XCONS (tail)->cdr) | |
3488 | { | |
3489 | int endpos; | |
3490 | overlay = XCONS (tail)->car; | |
3491 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3492 | if (endpos < pos) | |
3493 | break; | |
3494 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 3495 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3496 | hit_list = Fcons (overlay, hit_list); |
3497 | } | |
3498 | else | |
3499 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
3500 | tail = XCONS (tail)->cdr) | |
3501 | { | |
3502 | int startpos; | |
889bf329 | 3503 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
3504 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3505 | if (startpos > pos) | |
3506 | break; | |
3507 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 3508 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3509 | hit_list = Fcons (overlay, hit_list); |
3510 | } | |
3511 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
3512 | Fdelete_overlay (XCONS (hit_list)->car); | |
3513 | } | |
173f2a64 | 3514 | \f |
54dfdeb0 KH |
3515 | /* Somebody has tried to store a value with an unacceptable type |
3516 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 3517 | void |
54dfdeb0 KH |
3518 | buffer_slot_type_mismatch (offset) |
3519 | int offset; | |
0fa3ba92 | 3520 | { |
54dfdeb0 | 3521 | Lisp_Object sym; |
0fa3ba92 | 3522 | char *type_name; |
54dfdeb0 | 3523 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
3524 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
3525 | { | |
3526 | case Lisp_Int: type_name = "integers"; break; | |
3527 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 3528 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
3529 | default: |
3530 | abort (); | |
3531 | } | |
3532 | ||
3533 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 3534 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
3535 | } |
3536 | \f | |
1ab256cb RM |
3537 | init_buffer_once () |
3538 | { | |
3539 | register Lisp_Object tem; | |
3540 | ||
13de9290 RS |
3541 | buffer_permanent_local_flags = 0; |
3542 | ||
1ab256cb RM |
3543 | /* Make sure all markable slots in buffer_defaults |
3544 | are initialized reasonably, so mark_buffer won't choke. */ | |
3545 | reset_buffer (&buffer_defaults); | |
13de9290 | 3546 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 3547 | reset_buffer (&buffer_local_symbols); |
13de9290 | 3548 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
3549 | /* Prevent GC from getting confused. */ |
3550 | buffer_defaults.text = &buffer_defaults.own_text; | |
3551 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
3552 | #ifdef USE_TEXT_PROPERTIES | |
3553 | BUF_INTERVALS (&buffer_defaults) = 0; | |
3554 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3555 | #endif | |
67180c6a KH |
3556 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3557 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
3558 | |
3559 | /* Set up the default values of various buffer slots. */ | |
3560 | /* Must do these before making the first buffer! */ | |
3561 | ||
3562 | /* real setup is done in loaddefs.el */ | |
3563 | buffer_defaults.mode_line_format = build_string ("%-"); | |
3564 | buffer_defaults.abbrev_mode = Qnil; | |
3565 | buffer_defaults.overwrite_mode = Qnil; | |
3566 | buffer_defaults.case_fold_search = Qt; | |
3567 | buffer_defaults.auto_fill_function = Qnil; | |
3568 | buffer_defaults.selective_display = Qnil; | |
3569 | #ifndef old | |
3570 | buffer_defaults.selective_display_ellipses = Qt; | |
3571 | #endif | |
3572 | buffer_defaults.abbrev_table = Qnil; | |
3573 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 3574 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 3575 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 3576 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
3577 | buffer_defaults.overlays_before = Qnil; |
3578 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 3579 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 3580 | |
8d7a4592 | 3581 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
3582 | buffer_defaults.truncate_lines = Qnil; |
3583 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 3584 | buffer_defaults.direction_reversed = Qnil; |
1ab256cb | 3585 | |
f7975d07 | 3586 | #ifdef DOS_NT |
0776cb1b | 3587 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 3588 | #endif |
a1a17b61 | 3589 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 3590 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
3591 | XSETFASTINT (buffer_defaults.fill_column, 70); |
3592 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 3593 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 3594 | buffer_defaults.file_truename = Qnil; |
7962a441 | 3595 | XSETFASTINT (buffer_defaults.display_count, 0); |
1ab256cb RM |
3596 | |
3597 | /* Assign the local-flags to the slots that have default values. | |
3598 | The local flag is a bit that is used in the buffer | |
3599 | to say that it has its own local value for the slot. | |
3600 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
3601 | ||
3602 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 3603 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
3604 | |
3605 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
3606 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
3607 | XSETINT (buffer_local_flags.filename, -1); |
3608 | XSETINT (buffer_local_flags.directory, -1); | |
3609 | XSETINT (buffer_local_flags.backed_up, -1); | |
3610 | XSETINT (buffer_local_flags.save_length, -1); | |
3611 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
3612 | XSETINT (buffer_local_flags.read_only, -1); | |
3613 | XSETINT (buffer_local_flags.major_mode, -1); | |
3614 | XSETINT (buffer_local_flags.mode_name, -1); | |
3615 | XSETINT (buffer_local_flags.undo_list, -1); | |
3616 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 3617 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 3618 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 3619 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 3620 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 3621 | XSETINT (buffer_local_flags.display_count, -1); |
8d7a4592 KH |
3622 | |
3623 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
3624 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
3625 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
3626 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
3627 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
3628 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 3629 | #ifndef old |
8d7a4592 | 3630 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 3631 | #endif |
8d7a4592 KH |
3632 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
3633 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
3634 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
3635 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
3636 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
3637 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
3638 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
f7975d07 | 3639 | #ifdef DOS_NT |
8d7a4592 | 3640 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
13de9290 RS |
3641 | /* Make this one a permanent local. */ |
3642 | buffer_permanent_local_flags |= 0x4000; | |
54ad07d3 | 3643 | #endif |
2e716096 RS |
3644 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
3645 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); | |
3b06f880 KH |
3646 | XSETFASTINT (buffer_local_flags.category_table, 0x20000); |
3647 | XSETFASTINT (buffer_local_flags.direction_reversed, 0x40000); | |
a1a17b61 KH |
3648 | XSETFASTINT (buffer_local_flags.enable_multibyte_characters, 0x80000); |
3649 | /* Make this one a permanent local. */ | |
3650 | buffer_permanent_local_flags |= 0x80000; | |
c71b5d9b KH |
3651 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, 0x100000); |
3652 | /* Make this one a permanent local. */ | |
3653 | buffer_permanent_local_flags |= 0x100000; | |
3654 | ||
1ab256cb RM |
3655 | Vbuffer_alist = Qnil; |
3656 | current_buffer = 0; | |
3657 | all_buffers = 0; | |
3658 | ||
3659 | QSFundamental = build_string ("Fundamental"); | |
3660 | ||
3661 | Qfundamental_mode = intern ("fundamental-mode"); | |
3662 | buffer_defaults.major_mode = Qfundamental_mode; | |
3663 | ||
3664 | Qmode_class = intern ("mode-class"); | |
3665 | ||
3666 | Qprotected_field = intern ("protected-field"); | |
3667 | ||
3668 | Qpermanent_local = intern ("permanent-local"); | |
3669 | ||
3670 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
3671 | ||
3672 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 3673 | |
1ab256cb RM |
3674 | /* super-magic invisible buffer */ |
3675 | Vbuffer_alist = Qnil; | |
3676 | ||
ffd56f97 | 3677 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
3678 | } |
3679 | ||
3680 | init_buffer () | |
3681 | { | |
3682 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
3683 | char *pwd; |
3684 | struct stat dotstat, pwdstat; | |
136351b7 | 3685 | Lisp_Object temp; |
f7975d07 | 3686 | int rc; |
1ab256cb RM |
3687 | |
3688 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
3689 | |
3690 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
3691 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 3692 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
3693 | && stat (pwd, &pwdstat) == 0 |
3694 | && stat (".", &dotstat) == 0 | |
3695 | && dotstat.st_ino == pwdstat.st_ino | |
3696 | && dotstat.st_dev == pwdstat.st_dev | |
3697 | && strlen (pwd) < MAXPATHLEN) | |
3698 | strcpy (buf, pwd); | |
3699 | else if (getwd (buf) == 0) | |
cf1e6391 | 3700 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
3701 | |
3702 | #ifndef VMS | |
3703 | /* Maybe this should really use some standard subroutine | |
3704 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
3705 | rc = strlen (buf); |
3706 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
3707 | { | |
3708 | buf[rc] = DIRECTORY_SEP; | |
3709 | buf[rc + 1] = '\0'; | |
3710 | } | |
1ab256cb | 3711 | #endif /* not VMS */ |
0995fa35 | 3712 | |
1ab256cb | 3713 | current_buffer->directory = build_string (buf); |
136351b7 | 3714 | |
0995fa35 RS |
3715 | /* Add /: to the front of the name |
3716 | if it would otherwise be treated as magic. */ | |
3717 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
3718 | if (! NILP (temp)) | |
3719 | current_buffer->directory | |
3720 | = concat2 (build_string ("/:"), current_buffer->directory); | |
3721 | ||
136351b7 RS |
3722 | temp = get_minibuffer (0); |
3723 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
3724 | } |
3725 | ||
3726 | /* initialize the buffer routines */ | |
3727 | syms_of_buffer () | |
3728 | { | |
188d4d11 RM |
3729 | extern Lisp_Object Qdisabled; |
3730 | ||
9115729e KH |
3731 | staticpro (&last_overlay_modification_hooks); |
3732 | last_overlay_modification_hooks | |
3733 | = Fmake_vector (make_number (10), Qnil); | |
3734 | ||
1ab256cb RM |
3735 | staticpro (&Vbuffer_defaults); |
3736 | staticpro (&Vbuffer_local_symbols); | |
3737 | staticpro (&Qfundamental_mode); | |
3738 | staticpro (&Qmode_class); | |
3739 | staticpro (&QSFundamental); | |
3740 | staticpro (&Vbuffer_alist); | |
3741 | staticpro (&Qprotected_field); | |
3742 | staticpro (&Qpermanent_local); | |
3743 | staticpro (&Qkill_buffer_hook); | |
22378665 | 3744 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 3745 | staticpro (&Qoverlayp); |
9d7608b7 KH |
3746 | Qevaporate = intern ("evaporate"); |
3747 | staticpro (&Qevaporate); | |
294d215f | 3748 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 3749 | staticpro (&Qmodification_hooks); |
294d215f | 3750 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 3751 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 3752 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 3753 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 3754 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 3755 | staticpro (&Qget_file_buffer); |
5985d248 KH |
3756 | Qpriority = intern ("priority"); |
3757 | staticpro (&Qpriority); | |
3758 | Qwindow = intern ("window"); | |
3759 | staticpro (&Qwindow); | |
bbbe9545 KH |
3760 | Qbefore_string = intern ("before-string"); |
3761 | staticpro (&Qbefore_string); | |
3762 | Qafter_string = intern ("after-string"); | |
3763 | staticpro (&Qafter_string); | |
22378665 RS |
3764 | Qfirst_change_hook = intern ("first-change-hook"); |
3765 | staticpro (&Qfirst_change_hook); | |
3766 | Qbefore_change_functions = intern ("before-change-functions"); | |
3767 | staticpro (&Qbefore_change_functions); | |
3768 | Qafter_change_functions = intern ("after-change-functions"); | |
3769 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
3770 | |
3771 | Fput (Qprotected_field, Qerror_conditions, | |
3772 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
3773 | Fput (Qprotected_field, Qerror_message, | |
3774 | build_string ("Attempt to modify a protected field")); | |
3775 | ||
3776 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
3777 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
3778 | ||
3779 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
3780 | &buffer_defaults.mode_line_format, | |
3781 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
3782 | This is the same as (default-value 'mode-line-format)."); | |
3783 | ||
3784 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
3785 | &buffer_defaults.abbrev_mode, | |
3786 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
3787 | This is the same as (default-value 'abbrev-mode)."); | |
3788 | ||
3789 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
3790 | &buffer_defaults.ctl_arrow, | |
3791 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
3792 | This is the same as (default-value 'ctl-arrow)."); | |
3793 | ||
3b06f880 KH |
3794 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
3795 | &buffer_defaults.direction_reversed, | |
3796 | "Default value of `direction_reversed' for buffers that do not override it.\n\ | |
3797 | This is the same as (default-value 'direction-reversed)."); | |
3798 | ||
a1a17b61 KH |
3799 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
3800 | &buffer_defaults.enable_multibyte_characters, | |
3801 | "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ | |
3802 | This is the same as (default-value 'enable-multibyte-characters)."); | |
3803 | ||
c71b5d9b KH |
3804 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
3805 | &buffer_defaults.buffer_file_coding_system, | |
3806 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ | |
3807 | This is the same as (default-value 'buffer-file-coding-system)."); | |
3808 | ||
1ab256cb RM |
3809 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
3810 | &buffer_defaults.truncate_lines, | |
3811 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
3812 | This is the same as (default-value 'truncate-lines)."); | |
3813 | ||
3814 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
3815 | &buffer_defaults.fill_column, | |
3816 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
3817 | This is the same as (default-value 'fill-column)."); | |
3818 | ||
3819 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
3820 | &buffer_defaults.left_margin, | |
3821 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
3822 | This is the same as (default-value 'left-margin)."); | |
3823 | ||
3824 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
3825 | &buffer_defaults.tab_width, | |
3826 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
3827 | This is the same as (default-value 'tab-width)."); | |
3828 | ||
3829 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
3830 | &buffer_defaults.case_fold_search, | |
3831 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
3832 | This is the same as (default-value 'case-fold-search)."); | |
3833 | ||
f7975d07 | 3834 | #ifdef DOS_NT |
54ad07d3 RS |
3835 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
3836 | &buffer_defaults.buffer_file_type, | |
3837 | "Default file type for buffers that do not override it.\n\ | |
3838 | This is the same as (default-value 'buffer-file-type).\n\ | |
3839 | The file type is nil for text, t for binary."); | |
3840 | #endif | |
3841 | ||
0fa3ba92 JB |
3842 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
3843 | Qnil, 0); | |
1ab256cb RM |
3844 | |
3845 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
3846 | But make-docfile finds it! | |
3847 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 3848 | Qnil, |
1ab256cb RM |
3849 | "Template for displaying mode line for current buffer.\n\ |
3850 | Each buffer has its own value of this variable.\n\ | |
3851 | Value may be a string, a symbol or a list or cons cell.\n\ | |
3852 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
3853 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
3854 | in that the %-constructs below are not recognized.\n\ | |
3855 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
3856 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
3857 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
3858 | For a list whose car is a string or list, each element is processed\n\ | |
3859 | recursively and the results are effectively concatenated.\n\ | |
3860 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
3861 | and padded (if the number is positive) or truncated (if negative)\n\ | |
3862 | to the width specified by that number.\n\ | |
3863 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
3864 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
3865 | or when it is found in a cons-cell or a list)\n\ | |
3866 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
3867 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
3868 | % means buffer is read-only and * means it is modified.\n\ | |
3869 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 3870 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 3871 | %c -- print the current column number (this makes editing slower).\n\ |
dd24e6a6 | 3872 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 3873 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 3874 | or print Bottom or All.\n\ |
1ab256cb | 3875 | %n -- print Narrow if appropriate.\n\ |
b77087c5 | 3876 | %t -- print T if file is text, B if binary.\n\ |
1ab256cb RM |
3877 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
3878 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
3879 | Decimal digits after the % specify field width to which to pad."); | |
3880 | */ | |
3881 | ||
3882 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
3883 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
3884 | nil here means use current buffer's major mode."); | |
3885 | ||
3886 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 3887 | make_number (Lisp_Symbol), |
1ab256cb RM |
3888 | "Symbol for current buffer's major mode."); |
3889 | ||
3890 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 3891 | make_number (Lisp_String), |
1ab256cb RM |
3892 | "Pretty name of current buffer's major mode (a string)."); |
3893 | ||
0fa3ba92 | 3894 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
3895 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
3896 | Automatically becomes buffer-local when set in any fashion."); | |
3897 | ||
3898 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 3899 | Qnil, |
1ab256cb RM |
3900 | "*Non-nil if searches should ignore case.\n\ |
3901 | Automatically becomes buffer-local when set in any fashion."); | |
3902 | ||
3903 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 3904 | make_number (Lisp_Int), |
1ab256cb RM |
3905 | "*Column beyond which automatic line-wrapping should happen.\n\ |
3906 | Automatically becomes buffer-local when set in any fashion."); | |
3907 | ||
3908 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 3909 | make_number (Lisp_Int), |
1ab256cb RM |
3910 | "*Column for the default indent-line-function to indent to.\n\ |
3911 | Linefeed indents to this column in Fundamental mode.\n\ | |
3912 | Automatically becomes buffer-local when set in any fashion."); | |
3913 | ||
3914 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 3915 | make_number (Lisp_Int), |
1ab256cb RM |
3916 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
3917 | Automatically becomes buffer-local when set in any fashion."); | |
3918 | ||
0fa3ba92 | 3919 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb | 3920 | "*Non-nil means display control chars with uparrow.\n\ |
6a99d31d | 3921 | A value of nil means use backslash and octal digits.\n\ |
1ab256cb RM |
3922 | Automatically becomes buffer-local when set in any fashion.\n\ |
3923 | This variable does not apply to characters whose display is specified\n\ | |
3924 | in the current display table (if there is one)."); | |
3925 | ||
3b06f880 KH |
3926 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
3927 | ¤t_buffer->enable_multibyte_characters, Qnil, | |
3928 | "Non-nil means the buffer contents are regarded as multi-byte form\n\ | |
3929 | of characters, not a binary code. This affects the display, file I/O,\n\ | |
3930 | and behaviors of various editing commands."); | |
3931 | ||
c71b5d9b KH |
3932 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
3933 | ¤t_buffer->buffer_file_coding_system, Qnil, | |
3934 | "Coding system to be used for encoding the buffer contents on saving.\n\ | |
3935 | If it is nil, the buffer is saved without any code conversion unless\n\ | |
3936 | some coding system is specified in file-coding-system-alist\n\ | |
3937 | for the buffer file.\n\ | |
3938 | \n\ | |
3939 | This variable is never applied to a way of decoding\n\ | |
3940 | a file while reading it."); | |
3941 | ||
3b06f880 KH |
3942 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
3943 | Qnil, | |
3944 | "*Non-nil means lines in the buffer are displayed right to left."); | |
3945 | ||
0fa3ba92 | 3946 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
3947 | "*Non-nil means do not display continuation lines;\n\ |
3948 | give each line of text one screen line.\n\ | |
3949 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3950 | \n\ | |
3951 | Note that this is overridden by the variable\n\ | |
3952 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 3953 | and this buffer is not full-frame width."); |
1ab256cb | 3954 | |
f7975d07 | 3955 | #ifdef DOS_NT |
54ad07d3 RS |
3956 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
3957 | Qnil, | |
006d3d34 RS |
3958 | "Non-nil if the visited file is a binary file.\n\ |
3959 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
3960 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 3961 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
3962 | #endif |
3963 | ||
1ab256cb | 3964 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 3965 | make_number (Lisp_String), |
1ab256cb RM |
3966 | "Name of default directory of current buffer. Should end with slash.\n\ |
3967 | Each buffer has its own value of this variable."); | |
3968 | ||
3969 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3970 | Qnil, |
1ab256cb | 3971 | "Function called (if non-nil) to perform auto-fill.\n\ |
54158e68 | 3972 | It is called after self-inserting a space or newline.\n\ |
1ab256cb | 3973 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
3974 | NOTE: This variable is not a hook;\n\ |
3975 | its value may not be a list of functions."); | |
1ab256cb RM |
3976 | |
3977 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3978 | make_number (Lisp_String), |
1ab256cb RM |
3979 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3980 | Each buffer has its own value of this variable."); | |
3981 | ||
f6ed2e84 RS |
3982 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
3983 | make_number (Lisp_String), | |
bb4c204e | 3984 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
3985 | The truename of a file is calculated by `file-truename'\n\ |
3986 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
3987 | Each buffer has its own value of this variable."); |
3988 | ||
1ab256cb | 3989 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 3990 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3991 | make_number (Lisp_String), |
1ab256cb RM |
3992 | "Name of file for auto-saving current buffer,\n\ |
3993 | or nil if buffer should not be auto-saved.\n\ | |
3994 | Each buffer has its own value of this variable."); | |
3995 | ||
0fa3ba92 | 3996 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3997 | "Non-nil if this buffer is read-only.\n\ |
3998 | Each buffer has its own value of this variable."); | |
3999 | ||
0fa3ba92 | 4000 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
4001 | "Non-nil if this buffer's file has been backed up.\n\ |
4002 | Backing up is done before the first time the file is saved.\n\ | |
4003 | Each buffer has its own value of this variable."); | |
4004 | ||
4005 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 4006 | make_number (Lisp_Int), |
1ab256cb RM |
4007 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
4008 | 0 initially.\n\ | |
4009 | Each buffer has its own value of this variable."); | |
4010 | ||
4011 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 4012 | Qnil, |
1ab256cb RM |
4013 | "Non-nil enables selective display:\n\ |
4014 | Integer N as value means display only lines\n\ | |
4015 | that start with less than n columns of space.\n\ | |
4016 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
4017 | Then ^M's in the file are written into files as newlines.\n\n\ | |
4018 | Automatically becomes buffer-local when set in any fashion."); | |
4019 | ||
4020 | #ifndef old | |
4021 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4022 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 4023 | Qnil, |
1ab256cb RM |
4024 | "t means display ... on previous line when a line is invisible.\n\ |
4025 | Automatically becomes buffer-local when set in any fashion."); | |
4026 | #endif | |
4027 | ||
0fa3ba92 | 4028 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 4029 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
4030 | The value should be one of `overwrite-mode-textual',\n\ |
4031 | `overwrite-mode-binary', or nil.\n\ | |
4032 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 4033 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 4034 | until the tab is filled in.\n\ |
6bbb0d4a | 4035 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
4036 | Automatically becomes buffer-local when set in any fashion."); |
4037 | ||
54939090 RS |
4038 | #if 0 /* The doc string is too long for some compilers, |
4039 | but make-docfile can find it in this comment. */ | |
1ab256cb | 4040 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 4041 | Qnil, |
1ab256cb RM |
4042 | "Display table that controls display of the contents of current buffer.\n\ |
4043 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
4044 | The display table is a char-table created with `make-display-table'.\n\ |
4045 | The ordinary char-table elements control how to display each possible text\n\ | |
4046 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 4047 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
4048 | There are six extra slots to control the display of\n\ |
4049 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
4050 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 4051 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
4052 | (extra-slot 2, a single character);\n\ |
4053 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 4054 | a single character);\n\ |
6fdc249f | 4055 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
4056 | a vector of characters);\n\ |
4057 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
4058 | (extra-slot 5, a single character).\n\ |
4059 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
4060 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
4061 | Each window can have its own, overriding display table."); | |
54939090 RS |
4062 | #endif |
4063 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 4064 | Qnil, 0); |
1ab256cb | 4065 | |
1ab256cb RM |
4066 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
4067 | "Don't ask."); | |
4068 | */ | |
01050cb5 | 4069 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
f0724bcb | 4070 | "If non-nil, a function to call before each text change (obsolete).\n\ |
1ab256cb RM |
4071 | Two arguments are passed to the function: the positions of\n\ |
4072 | the beginning and end of the range of old text to be changed.\n\ | |
4073 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4074 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 4075 | \n\ |
5f079267 | 4076 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
4077 | don't call any before-change or after-change functions.\n\ |
4078 | That's because these variables are temporarily set to nil.\n\ | |
4079 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4080 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4081 | accomplishing an equivalent result by using other variables.\n\n\ |
4082 | This variable is obsolete; use `before-change-functions' instead."); | |
1ab256cb RM |
4083 | Vbefore_change_function = Qnil; |
4084 | ||
4085 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
f0724bcb | 4086 | "If non-nil, a Function to call after each text change (obsolete).\n\ |
1ab256cb RM |
4087 | Three arguments are passed to the function: the positions of\n\ |
4088 | the beginning and end of the range of changed text,\n\ | |
4089 | and the length of the pre-change text replaced by that range.\n\ | |
4090 | \(For an insertion, the pre-change length is zero;\n\ | |
4091 | for a deletion, that length is the number of characters deleted,\n\ | |
4092 | and the post-change beginning and end are at the same place.)\n\ | |
4093 | \n\ | |
5f079267 | 4094 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
4095 | don't call any before-change or after-change functions.\n\ |
4096 | That's because these variables are temporarily set to nil.\n\ | |
4097 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4098 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
4099 | accomplishing an equivalent result by using other variables.\n\n\ |
4100 | This variable is obsolete; use `after-change-functions' instead."); | |
1ab256cb RM |
4101 | Vafter_change_function = Qnil; |
4102 | ||
5f079267 RS |
4103 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
4104 | "List of functions to call before each text change.\n\ | |
4105 | Two arguments are passed to each function: the positions of\n\ | |
4106 | the beginning and end of the range of old text to be changed.\n\ | |
4107 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
4108 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
4109 | \n\ |
4110 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
4111 | don't call any before-change or after-change functions.\n\ |
4112 | That's because these variables are temporarily set to nil.\n\ | |
4113 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4114 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 4115 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
4116 | Vbefore_change_functions = Qnil; |
4117 | ||
4118 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
4119 | "List of function to call after each text change.\n\ | |
4120 | Three arguments are passed to each function: the positions of\n\ | |
4121 | the beginning and end of the range of changed text,\n\ | |
4122 | and the length of the pre-change text replaced by that range.\n\ | |
4123 | \(For an insertion, the pre-change length is zero;\n\ | |
4124 | for a deletion, that length is the number of characters deleted,\n\ | |
4125 | and the post-change beginning and end are at the same place.)\n\ | |
4126 | \n\ | |
4127 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
4128 | don't call any before-change or after-change functions.\n\ |
4129 | That's because these variables are temporarily set to nil.\n\ | |
4130 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
4131 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 4132 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 4133 | |
5f079267 RS |
4134 | Vafter_change_functions = Qnil; |
4135 | ||
dbc4e1c1 JB |
4136 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
4137 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
4138 | The functions are run using the `run-hooks' function."); | |
4139 | Vfirst_change_hook = Qnil; | |
1ab256cb | 4140 | |
54939090 RS |
4141 | #if 0 /* The doc string is too long for some compilers, |
4142 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 4143 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
4144 | "List of undo entries in current buffer.\n\ |
4145 | Recent changes come first; older changes follow newer.\n\ | |
4146 | \n\ | |
630f4018 KH |
4147 | An entry (BEG . END) represents an insertion which begins at\n\ |
4148 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
4149 | \n\ |
4150 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
4151 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
4152 | of the text being deleted; if negative, point was at the end.\n\ | |
4153 | \n\ | |
6c0df54a RS |
4154 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
4155 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
4156 | of the visited file's modification time, as of that time. If the\n\ | |
4157 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
4158 | obsolete.\n\ |
4159 | \n\ | |
6c0df54a RS |
4160 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
4161 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
4162 | and VALUE is the old value.\n\ | |
483c1fd3 | 4163 | \n\ |
da1c183c RS |
4164 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
4165 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
4166 | \n\ | |
bec44fd6 JB |
4167 | An entry of the form POSITION indicates that point was at the buffer\n\ |
4168 | location given by the integer. Undoing an entry of this form places\n\ | |
4169 | point at POSITION.\n\ | |
4170 | \n\ | |
1ab256cb RM |
4171 | nil marks undo boundaries. The undo command treats the changes\n\ |
4172 | between two undo boundaries as a single step to be undone.\n\ | |
4173 | \n\ | |
bec44fd6 | 4174 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
4175 | #endif |
4176 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 4177 | 0); |
1ab256cb | 4178 | |
c48f61ef RS |
4179 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
4180 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
4181 | Automatically local in all buffers."); | |
4182 | ||
28e969dd | 4183 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
4184 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
4185 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 4186 | \n\ |
f0c5b712 JB |
4187 | Normally, the line-motion functions work by scanning the buffer for\n\ |
4188 | newlines. Columnar operations (like move-to-column and\n\ | |
4189 | compute-motion) also work by scanning the buffer, summing character\n\ | |
4190 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 4191 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
4192 | motion functions will take longer to execute. Emacs may also take\n\ |
4193 | longer to update the display.\n\ | |
28e969dd | 4194 | \n\ |
f0c5b712 JB |
4195 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
4196 | results of their scans, and consult the cache to avoid rescanning\n\ | |
4197 | regions of the buffer until the text is modified. The caches are most\n\ | |
4198 | beneficial when they prevent the most searching---that is, when the\n\ | |
4199 | buffer contains long lines and large regions of characters with the\n\ | |
4200 | same, fixed screen width.\n\ | |
28e969dd | 4201 | \n\ |
f0c5b712 JB |
4202 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
4203 | become slightly slower (because of the overhead of consulting the\n\ | |
4204 | cache), and the caches will use memory roughly proportional to the\n\ | |
4205 | number of newlines and characters whose screen width varies.\n\ | |
4206 | \n\ | |
4207 | The caches require no explicit maintenance; their accuracy is\n\ | |
4208 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
4209 | the cache should not affect the behavior of any of the motion\n\ | |
4210 | functions; it should only affect their performance."); | |
28e969dd | 4211 | |
943e065b RS |
4212 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
4213 | "Value of point before the last series of scroll operations, or nil."); | |
4214 | ||
be9aafdd BG |
4215 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
4216 | "List of formats to use when saving this buffer.\n\ | |
4217 | Formats are defined by `format-alist'. This variable is\n\ | |
4218 | set when a file is visited. Automatically local in all buffers."); | |
4219 | ||
3cb719bd RS |
4220 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4221 | ¤t_buffer->invisibility_spec, Qnil, | |
4222 | "Invisibility spec of this buffer.\n\ | |
4223 | The default is t, which means that text is invisible\n\ | |
4224 | if it has a non-nil `invisible' property.\n\ | |
4225 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
4226 | property is an element in that list.\n\ | |
554216ad KH |
4227 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
4228 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
4229 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
4230 | ||
7962a441 RS |
4231 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4232 | ¤t_buffer->display_count, Qnil, | |
4233 | "A number incremented each time the buffer is displayed in a window."); | |
4234 | ||
c48f61ef | 4235 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
319c537c RS |
4236 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
4237 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ | |
4238 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ | |
4239 | all windows or just the selected window."); | |
c48f61ef RS |
4240 | Vtransient_mark_mode = Qnil; |
4241 | ||
0a4469c9 | 4242 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
4243 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
4244 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
4245 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
4246 | and disregard a `read-only' text property if the property value\n\ | |
4247 | is a member of the list."); | |
4248 | Vinhibit_read_only = Qnil; | |
4249 | ||
dcdffbf6 RS |
4250 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
4251 | "List of functions called with no args to query before killing a buffer."); | |
4252 | Vkill_buffer_query_functions = Qnil; | |
4253 | ||
0dc88e60 | 4254 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
4255 | defsubr (&Sbuffer_list); |
4256 | defsubr (&Sget_buffer); | |
4257 | defsubr (&Sget_file_buffer); | |
4258 | defsubr (&Sget_buffer_create); | |
336cd056 | 4259 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 4260 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
4261 | defsubr (&Sbuffer_name); |
4262 | /*defsubr (&Sbuffer_number);*/ | |
4263 | defsubr (&Sbuffer_file_name); | |
336cd056 | 4264 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
4265 | defsubr (&Sbuffer_local_variables); |
4266 | defsubr (&Sbuffer_modified_p); | |
4267 | defsubr (&Sset_buffer_modified_p); | |
4268 | defsubr (&Sbuffer_modified_tick); | |
4269 | defsubr (&Srename_buffer); | |
4270 | defsubr (&Sother_buffer); | |
4271 | defsubr (&Sbuffer_disable_undo); | |
4272 | defsubr (&Sbuffer_enable_undo); | |
4273 | defsubr (&Skill_buffer); | |
4274 | defsubr (&Serase_buffer); | |
a9ee7a59 | 4275 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
4276 | defsubr (&Sswitch_to_buffer); |
4277 | defsubr (&Spop_to_buffer); | |
4278 | defsubr (&Scurrent_buffer); | |
4279 | defsubr (&Sset_buffer); | |
4280 | defsubr (&Sbarf_if_buffer_read_only); | |
4281 | defsubr (&Sbury_buffer); | |
1ab256cb | 4282 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 4283 | |
52f8ec73 | 4284 | defsubr (&Soverlayp); |
2eec3b4e RS |
4285 | defsubr (&Smake_overlay); |
4286 | defsubr (&Sdelete_overlay); | |
4287 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
4288 | defsubr (&Soverlay_start); |
4289 | defsubr (&Soverlay_end); | |
4290 | defsubr (&Soverlay_buffer); | |
4291 | defsubr (&Soverlay_properties); | |
2eec3b4e | 4292 | defsubr (&Soverlays_at); |
74514898 | 4293 | defsubr (&Soverlays_in); |
2eec3b4e | 4294 | defsubr (&Snext_overlay_change); |
239c932b | 4295 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
4296 | defsubr (&Soverlay_recenter); |
4297 | defsubr (&Soverlay_lists); | |
4298 | defsubr (&Soverlay_get); | |
4299 | defsubr (&Soverlay_put); | |
1ab256cb RM |
4300 | } |
4301 | ||
4302 | keys_of_buffer () | |
4303 | { | |
4304 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
4305 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
4306 | |
4307 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
4308 | initialized when that function gets called. */ | |
4309 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 4310 | } |