Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
4158c17d | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994 |
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 | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb RM |
24 | #include <sys/param.h> |
25 | ||
26 | #ifndef MAXPATHLEN | |
27 | /* in 4.1, param.h fails to define this. */ | |
28 | #define MAXPATHLEN 1024 | |
29 | #endif /* not MAXPATHLEN */ | |
30 | ||
18160b98 | 31 | #include <config.h> |
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "buffer.h" | |
28e969dd | 37 | #include "region-cache.h" |
1ab256cb | 38 | #include "indent.h" |
d014bf88 | 39 | #include "blockinput.h" |
1ab256cb RM |
40 | |
41 | struct buffer *current_buffer; /* the current buffer */ | |
42 | ||
43 | /* First buffer in chain of all buffers (in reverse order of creation). | |
44 | Threaded through ->next. */ | |
45 | ||
46 | struct buffer *all_buffers; | |
47 | ||
48 | /* This structure holds the default values of the buffer-local variables | |
49 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
50 | The default value occupies the same slot in this structure | |
51 | as an individual buffer's value occupies in that buffer. | |
52 | Setting the default value also goes through the alist of buffers | |
53 | and stores into each buffer that does not say it has a local value. */ | |
54 | ||
55 | struct buffer buffer_defaults; | |
56 | ||
57 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
58 | ||
59 | static Lisp_Object Vbuffer_defaults; | |
60 | ||
61 | /* This structure marks which slots in a buffer have corresponding | |
62 | default values in buffer_defaults. | |
63 | Each such slot has a nonzero value in this structure. | |
64 | The value has only one nonzero bit. | |
65 | ||
66 | When a buffer has its own local value for a slot, | |
67 | the bit for that slot (found in the same slot in this structure) | |
68 | is turned on in the buffer's local_var_flags slot. | |
69 | ||
70 | If a slot in this structure is -1, then even though there may | |
71 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
72 | and the corresponding slot in buffer_defaults is not used. | |
73 | ||
74 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
75 | but there is a default value which is copied into each buffer. | |
76 | ||
77 | If a slot in this structure is negative, then even though there may | |
78 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
79 | and the corresponding slot in buffer_defaults is not used. | |
80 | ||
81 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
82 | zero, that is a bug */ | |
83 | ||
84 | struct buffer buffer_local_flags; | |
85 | ||
86 | /* This structure holds the names of symbols whose values may be | |
87 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
88 | ||
89 | struct buffer buffer_local_symbols; | |
90 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
91 | static Lisp_Object Vbuffer_local_symbols; | |
92 | ||
0fa3ba92 JB |
93 | /* This structure holds the required types for the values in the |
94 | buffer-local slots. If a slot contains Qnil, then the | |
95 | corresponding buffer slot may contain a value of any type. If a | |
96 | slot contains an integer, then prospective values' tags must be | |
97 | equal to that integer. When a tag does not match, the function | |
98 | buffer_slot_type_mismatch will signal an error. */ | |
99 | struct buffer buffer_local_types; | |
100 | ||
1ab256cb | 101 | Lisp_Object Fset_buffer (); |
01050cb5 | 102 | void set_buffer_internal (); |
173f2a64 | 103 | static void call_overlay_mod_hooks (); |
1ab256cb RM |
104 | |
105 | /* Alist of all buffer names vs the buffers. */ | |
106 | /* This used to be a variable, but is no longer, | |
107 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
108 | Lisp_Object Vbuffer_alist; | |
109 | ||
110 | /* Functions to call before and after each text change. */ | |
111 | Lisp_Object Vbefore_change_function; | |
112 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
113 | Lisp_Object Vbefore_change_functions; |
114 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 115 | |
c48f61ef RS |
116 | Lisp_Object Vtransient_mark_mode; |
117 | ||
a96b68f1 RS |
118 | /* t means ignore all read-only text properties. |
119 | A list means ignore such a property if its value is a member of the list. | |
120 | Any non-nil value means ignore buffer-read-only. */ | |
121 | Lisp_Object Vinhibit_read_only; | |
122 | ||
dcdffbf6 RS |
123 | /* List of functions to call that can query about killing a buffer. |
124 | If any of these functions returns nil, we don't kill it. */ | |
125 | Lisp_Object Vkill_buffer_query_functions; | |
126 | ||
dbc4e1c1 JB |
127 | /* List of functions to call before changing an unmodified buffer. */ |
128 | Lisp_Object Vfirst_change_hook; | |
129 | Lisp_Object Qfirst_change_hook; | |
1ab256cb RM |
130 | |
131 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
132 | ||
133 | Lisp_Object Qprotected_field; | |
134 | ||
135 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
136 | ||
137 | Lisp_Object Qkill_buffer_hook; | |
138 | ||
5fe0b67e RS |
139 | Lisp_Object Qget_file_buffer; |
140 | ||
52f8ec73 JB |
141 | Lisp_Object Qoverlayp; |
142 | ||
9d7608b7 | 143 | Lisp_Object Qpriority, Qwindow, Qevaporate; |
5985d248 | 144 | |
294d215f RS |
145 | Lisp_Object Qmodification_hooks; |
146 | Lisp_Object Qinsert_in_front_hooks; | |
147 | Lisp_Object Qinsert_behind_hooks; | |
148 | ||
1ab256cb RM |
149 | /* For debugging; temporary. See set_buffer_internal. */ |
150 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
151 | ||
152 | nsberror (spec) | |
153 | Lisp_Object spec; | |
154 | { | |
a7a60ce9 | 155 | if (STRINGP (spec)) |
1ab256cb RM |
156 | error ("No buffer named %s", XSTRING (spec)->data); |
157 | error ("Invalid buffer argument"); | |
158 | } | |
159 | \f | |
160 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, | |
161 | "Return a list of all existing live buffers.") | |
162 | () | |
163 | { | |
164 | return Fmapcar (Qcdr, Vbuffer_alist); | |
165 | } | |
166 | ||
04ae1b48 RS |
167 | /* Like Fassoc, but use Fstring_equal to compare |
168 | (which ignores text properties), | |
169 | and don't ever QUIT. */ | |
170 | ||
171 | static Lisp_Object | |
172 | assoc_ignore_text_properties (key, list) | |
173 | register Lisp_Object key; | |
174 | Lisp_Object list; | |
175 | { | |
176 | register Lisp_Object tail; | |
177 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
178 | { | |
179 | register Lisp_Object elt, tem; | |
180 | elt = Fcar (tail); | |
181 | tem = Fstring_equal (Fcar (elt), key); | |
182 | if (!NILP (tem)) | |
183 | return elt; | |
184 | } | |
185 | return Qnil; | |
186 | } | |
187 | ||
1ab256cb RM |
188 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
189 | "Return the buffer named NAME (a string).\n\ | |
190 | If there is no live buffer named NAME, return nil.\n\ | |
191 | NAME may also be a buffer; if so, the value is that buffer.") | |
192 | (name) | |
193 | register Lisp_Object name; | |
194 | { | |
a7a60ce9 | 195 | if (BUFFERP (name)) |
1ab256cb RM |
196 | return name; |
197 | CHECK_STRING (name, 0); | |
198 | ||
04ae1b48 | 199 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
200 | } |
201 | ||
202 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
203 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 204 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
205 | If there is no such live buffer, return nil.\n\ |
206 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
207 | (filename) |
208 | register Lisp_Object filename; | |
209 | { | |
210 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
211 | Lisp_Object handler; |
212 | ||
1ab256cb RM |
213 | CHECK_STRING (filename, 0); |
214 | filename = Fexpand_file_name (filename, Qnil); | |
215 | ||
5fe0b67e RS |
216 | /* If the file name has special constructs in it, |
217 | call the corresponding file handler. */ | |
a617e913 | 218 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
219 | if (!NILP (handler)) |
220 | return call2 (handler, Qget_file_buffer, filename); | |
221 | ||
1ab256cb RM |
222 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
223 | { | |
224 | buf = Fcdr (XCONS (tail)->car); | |
a7a60ce9 KH |
225 | if (!BUFFERP (buf)) continue; |
226 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 227 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 228 | if (!NILP (tem)) |
1ab256cb RM |
229 | return buf; |
230 | } | |
231 | return Qnil; | |
232 | } | |
233 | ||
234 | /* Incremented for each buffer created, to assign the buffer number. */ | |
235 | int buffer_count; | |
236 | ||
237 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
238 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
239 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 240 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
241 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
242 | The value is never nil.") | |
243 | (name) | |
244 | register Lisp_Object name; | |
245 | { | |
a9ee7a59 | 246 | register Lisp_Object buf; |
1ab256cb RM |
247 | register struct buffer *b; |
248 | ||
249 | buf = Fget_buffer (name); | |
265a9e55 | 250 | if (!NILP (buf)) |
1ab256cb RM |
251 | return buf; |
252 | ||
31cd83e9 KH |
253 | if (XSTRING (name)->size == 0) |
254 | error ("Empty string for buffer name is not allowed"); | |
255 | ||
9ac0d9e0 | 256 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb | 257 | |
336cd056 RS |
258 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
259 | ||
260 | /* An ordinary buffer uses its own struct buffer_text. */ | |
261 | b->text = &b->own_text; | |
262 | b->base_buffer = 0; | |
263 | ||
1ab256cb | 264 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 265 | BLOCK_INPUT; |
1ab256cb | 266 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 267 | UNBLOCK_INPUT; |
1ab256cb | 268 | if (! BUF_BEG_ADDR (b)) |
81841847 | 269 | buffer_memory_full (); |
1ab256cb RM |
270 | |
271 | BUF_PT (b) = 1; | |
272 | BUF_GPT (b) = 1; | |
273 | BUF_BEGV (b) = 1; | |
274 | BUF_ZV (b) = 1; | |
275 | BUF_Z (b) = 1; | |
276 | BUF_MODIFF (b) = 1; | |
336cd056 RS |
277 | BUF_SAVE_MODIFF (b) = 1; |
278 | BUF_INTERVALS (b) = 0; | |
1ab256cb | 279 | |
28e969dd JB |
280 | b->newline_cache = 0; |
281 | b->width_run_cache = 0; | |
282 | b->width_table = Qnil; | |
283 | ||
1ab256cb RM |
284 | /* Put this on the chain of all buffers including killed ones. */ |
285 | b->next = all_buffers; | |
286 | all_buffers = b; | |
287 | ||
336cd056 RS |
288 | /* An ordinary buffer normally doesn't need markers |
289 | to handle BEGV and ZV. */ | |
290 | b->pt_marker = Qnil; | |
291 | b->begv_marker = Qnil; | |
292 | b->zv_marker = Qnil; | |
04ae1b48 RS |
293 | |
294 | name = Fcopy_sequence (name); | |
295 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 296 | b->name = name; |
04ae1b48 | 297 | |
1ab256cb RM |
298 | if (XSTRING (name)->data[0] != ' ') |
299 | b->undo_list = Qnil; | |
300 | else | |
301 | b->undo_list = Qt; | |
302 | ||
303 | reset_buffer (b); | |
bcd40520 | 304 | reset_buffer_local_variables (b); |
1ab256cb RM |
305 | |
306 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 307 | XSETBUFFER (buf, b); |
1ab256cb RM |
308 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
309 | ||
310 | b->mark = Fmake_marker (); | |
336cd056 RS |
311 | BUF_MARKERS (b) = Qnil; |
312 | b->name = name; | |
313 | return buf; | |
314 | } | |
315 | ||
316 | DEFUN ("make-indirect-buffer", | |
317 | Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, | |
318 | "BMake indirect buffer: \nbIndirect to base buffer: ", | |
319 | "Create and return an indirect buffer named NAME, with base buffer BASE.\n\ | |
320 | BASE should be an existing buffer (or buffer name).") | |
321 | (name, base_buffer) | |
322 | register Lisp_Object name, base_buffer; | |
323 | { | |
324 | register Lisp_Object buf; | |
325 | register struct buffer *b; | |
326 | ||
327 | buf = Fget_buffer (name); | |
328 | if (!NILP (buf)) | |
329 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
330 | ||
331 | base_buffer = Fget_buffer (base_buffer); | |
332 | if (NILP (base_buffer)) | |
333 | error ("No such buffer: `%s'", | |
334 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
335 | ||
336 | if (XSTRING (name)->size == 0) | |
337 | error ("Empty string for buffer name is not allowed"); | |
338 | ||
339 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
340 | ||
341 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
342 | ||
343 | if (XBUFFER (base_buffer)->base_buffer) | |
344 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
345 | else | |
346 | b->base_buffer = XBUFFER (base_buffer); | |
347 | ||
348 | /* Use the base buffer's text object. */ | |
349 | b->text = b->base_buffer->text; | |
350 | ||
351 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
352 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
353 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
354 | ||
355 | b->newline_cache = 0; | |
356 | b->width_run_cache = 0; | |
357 | b->width_table = Qnil; | |
358 | ||
359 | /* Put this on the chain of all buffers including killed ones. */ | |
360 | b->next = all_buffers; | |
361 | all_buffers = b; | |
362 | ||
363 | name = Fcopy_sequence (name); | |
364 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
365 | b->name = name; | |
366 | ||
367 | reset_buffer (b); | |
368 | reset_buffer_local_variables (b); | |
369 | ||
370 | /* Put this in the alist of all live buffers. */ | |
371 | XSETBUFFER (buf, b); | |
372 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
373 | ||
374 | b->mark = Fmake_marker (); | |
1ab256cb | 375 | b->name = name; |
336cd056 RS |
376 | |
377 | /* Make sure the base buffer has markers for its narrowing. */ | |
378 | if (NILP (b->base_buffer->pt_marker)) | |
379 | { | |
380 | b->base_buffer->pt_marker = Fmake_marker (); | |
381 | Fset_marker (b->base_buffer->pt_marker, | |
382 | make_number (BUF_PT (b->base_buffer)), base_buffer); | |
383 | } | |
384 | if (NILP (b->base_buffer->begv_marker)) | |
385 | { | |
386 | b->base_buffer->begv_marker = Fmake_marker (); | |
387 | Fset_marker (b->base_buffer->begv_marker, | |
388 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); | |
389 | } | |
390 | if (NILP (b->base_buffer->zv_marker)) | |
391 | { | |
392 | b->base_buffer->zv_marker = Fmake_marker (); | |
393 | Fset_marker (b->base_buffer->zv_marker, | |
394 | make_number (BUF_ZV (b->base_buffer)), base_buffer); | |
395 | } | |
396 | ||
397 | /* Give the indirect buffer markers for its narrowing. */ | |
398 | b->pt_marker = Fpoint_marker (); | |
399 | b->begv_marker = Fpoint_min_marker (); | |
400 | b->zv_marker = Fpoint_max_marker (); | |
401 | ||
a9ee7a59 | 402 | return buf; |
1ab256cb RM |
403 | } |
404 | ||
bcd40520 RS |
405 | /* Reinitialize everything about a buffer except its name and contents |
406 | and local variables. */ | |
1ab256cb RM |
407 | |
408 | void | |
409 | reset_buffer (b) | |
410 | register struct buffer *b; | |
411 | { | |
412 | b->filename = Qnil; | |
f6ed2e84 | 413 | b->file_truename = Qnil; |
1ab256cb RM |
414 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
415 | b->modtime = 0; | |
8d7a4592 | 416 | XSETFASTINT (b->save_length, 0); |
1ab256cb RM |
417 | b->last_window_start = 1; |
418 | b->backed_up = Qnil; | |
419 | b->auto_save_modified = 0; | |
84f6bcba | 420 | b->auto_save_failure_time = -1; |
1ab256cb RM |
421 | b->auto_save_file_name = Qnil; |
422 | b->read_only = Qnil; | |
2eec3b4e RS |
423 | b->overlays_before = Qnil; |
424 | b->overlays_after = Qnil; | |
8d7a4592 | 425 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 426 | b->mark_active = Qnil; |
943e065b | 427 | b->point_before_scroll = Qnil; |
1ab256cb RM |
428 | } |
429 | ||
bcd40520 RS |
430 | /* Reset buffer B's local variables info. |
431 | Don't use this on a buffer that has already been in use; | |
432 | it does not treat permanent locals consistently. | |
433 | Instead, use Fkill_all_local_variables. */ | |
434 | ||
c48f61ef | 435 | reset_buffer_local_variables (b) |
1ab256cb RM |
436 | register struct buffer *b; |
437 | { | |
438 | register int offset; | |
439 | ||
440 | /* Reset the major mode to Fundamental, together with all the | |
441 | things that depend on the major mode. | |
442 | default-major-mode is handled at a higher level. | |
443 | We ignore it here. */ | |
444 | b->major_mode = Qfundamental_mode; | |
445 | b->keymap = Qnil; | |
446 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
447 | b->mode_name = QSFundamental; | |
448 | b->minor_modes = Qnil; | |
449 | b->downcase_table = Vascii_downcase_table; | |
450 | b->upcase_table = Vascii_upcase_table; | |
e9edf33c RS |
451 | b->case_canon_table = Vascii_canon_table; |
452 | b->case_eqv_table = Vascii_eqv_table; | |
336cd056 | 453 | b->buffer_file_type = Qnil; |
1ab256cb RM |
454 | #if 0 |
455 | b->sort_table = XSTRING (Vascii_sort_table); | |
456 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
457 | #endif /* 0 */ | |
458 | ||
459 | /* Reset all per-buffer variables to their defaults. */ | |
460 | b->local_var_alist = Qnil; | |
461 | b->local_var_flags = 0; | |
462 | ||
463 | /* For each slot that has a default value, | |
464 | copy that into the slot. */ | |
465 | ||
466 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
467 | offset < sizeof (struct buffer); | |
4d2f1389 | 468 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
469 | { |
470 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
471 | if (flag > 0 || flag == -2) | |
472 | *(Lisp_Object *)(offset + (char *)b) = | |
473 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
474 | } | |
1ab256cb RM |
475 | } |
476 | ||
01050cb5 RM |
477 | /* We split this away from generate-new-buffer, because rename-buffer |
478 | and set-visited-file-name ought to be able to use this to really | |
479 | rename the buffer properly. */ | |
480 | ||
481 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 482 | 1, 2, 0, |
01050cb5 RM |
483 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
484 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 485 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 486 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 487 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 488 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 489 | even if a buffer with that name exists.") |
c273e647 RS |
490 | (name, ignore) |
491 | register Lisp_Object name, ignore; | |
1ab256cb RM |
492 | { |
493 | register Lisp_Object gentemp, tem; | |
494 | int count; | |
495 | char number[10]; | |
496 | ||
497 | CHECK_STRING (name, 0); | |
498 | ||
499 | tem = Fget_buffer (name); | |
265a9e55 | 500 | if (NILP (tem)) |
01050cb5 | 501 | return name; |
1ab256cb RM |
502 | |
503 | count = 1; | |
504 | while (1) | |
505 | { | |
506 | sprintf (number, "<%d>", ++count); | |
507 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 508 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
509 | if (!NILP (tem)) |
510 | return gentemp; | |
1ab256cb | 511 | tem = Fget_buffer (gentemp); |
265a9e55 | 512 | if (NILP (tem)) |
01050cb5 | 513 | return gentemp; |
1ab256cb RM |
514 | } |
515 | } | |
516 | ||
517 | \f | |
518 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
519 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 520 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
521 | (buffer) |
522 | register Lisp_Object buffer; | |
523 | { | |
265a9e55 | 524 | if (NILP (buffer)) |
1ab256cb RM |
525 | return current_buffer->name; |
526 | CHECK_BUFFER (buffer, 0); | |
527 | return XBUFFER (buffer)->name; | |
528 | } | |
529 | ||
530 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
531 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
532 | No argument or nil as argument means use the current buffer.") | |
533 | (buffer) | |
534 | register Lisp_Object buffer; | |
535 | { | |
265a9e55 | 536 | if (NILP (buffer)) |
1ab256cb RM |
537 | return current_buffer->filename; |
538 | CHECK_BUFFER (buffer, 0); | |
539 | return XBUFFER (buffer)->filename; | |
540 | } | |
541 | ||
336cd056 RS |
542 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
543 | 0, 1, 0, | |
544 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
545 | If BUFFER is not indirect, return nil.") | |
546 | (buffer) | |
547 | register Lisp_Object buffer; | |
548 | { | |
549 | struct buffer *base; | |
550 | Lisp_Object base_buffer; | |
551 | ||
552 | if (NILP (buffer)) | |
553 | base = current_buffer->base_buffer; | |
554 | else | |
555 | { | |
556 | CHECK_BUFFER (buffer, 0); | |
557 | base = XBUFFER (buffer)->base_buffer; | |
558 | } | |
559 | ||
560 | if (! base) | |
561 | return Qnil; | |
562 | XSETBUFFER (base_buffer, base); | |
563 | return base_buffer; | |
564 | } | |
565 | ||
1ab256cb RM |
566 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
567 | Sbuffer_local_variables, 0, 1, 0, | |
568 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
569 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
570 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
571 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
572 | No argument or nil as argument means use current buffer as BUFFER.") | |
573 | (buffer) | |
574 | register Lisp_Object buffer; | |
575 | { | |
576 | register struct buffer *buf; | |
553defa4 | 577 | register Lisp_Object result; |
1ab256cb | 578 | |
265a9e55 | 579 | if (NILP (buffer)) |
1ab256cb RM |
580 | buf = current_buffer; |
581 | else | |
582 | { | |
583 | CHECK_BUFFER (buffer, 0); | |
584 | buf = XBUFFER (buffer); | |
585 | } | |
586 | ||
553defa4 RS |
587 | result = Qnil; |
588 | ||
1ab256cb | 589 | { |
553defa4 RS |
590 | register Lisp_Object tail; |
591 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 592 | { |
553defa4 RS |
593 | Lisp_Object val, elt; |
594 | ||
595 | elt = XCONS (tail)->car; | |
596 | ||
e0585c64 RS |
597 | /* Reference each variable in the alist in buf. |
598 | If inquiring about the current buffer, this gets the current values, | |
599 | so store them into the alist so the alist is up to date. | |
600 | If inquiring about some other buffer, this swaps out any values | |
601 | for that buffer, making the alist up to date automatically. */ | |
602 | val = find_symbol_value (XCONS (elt)->car); | |
603 | /* Use the current buffer value only if buf is the current buffer. */ | |
604 | if (buf != current_buffer) | |
553defa4 RS |
605 | val = XCONS (elt)->cdr; |
606 | ||
607 | /* If symbol is unbound, put just the symbol in the list. */ | |
608 | if (EQ (val, Qunbound)) | |
609 | result = Fcons (XCONS (elt)->car, result); | |
610 | /* Otherwise, put (symbol . value) in the list. */ | |
611 | else | |
612 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
613 | } |
614 | } | |
615 | ||
1ab256cb RM |
616 | /* Add on all the variables stored in special slots. */ |
617 | { | |
618 | register int offset, mask; | |
619 | ||
620 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
621 | offset < sizeof (struct buffer); | |
4d2f1389 | 622 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 623 | { |
aab80822 | 624 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 625 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
626 | if (SYMBOLP (*(Lisp_Object *)(offset |
627 | + (char *)&buffer_local_symbols))) | |
628 | result = Fcons (Fcons (*((Lisp_Object *) | |
629 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
630 | *(Lisp_Object *)(offset + (char *)buf)), |
631 | result); | |
1ab256cb RM |
632 | } |
633 | } | |
553defa4 RS |
634 | |
635 | return result; | |
1ab256cb RM |
636 | } |
637 | ||
638 | \f | |
639 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
640 | 0, 1, 0, | |
641 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
642 | No argument or nil as argument means use current buffer as BUFFER.") | |
643 | (buffer) | |
644 | register Lisp_Object buffer; | |
645 | { | |
646 | register struct buffer *buf; | |
265a9e55 | 647 | if (NILP (buffer)) |
1ab256cb RM |
648 | buf = current_buffer; |
649 | else | |
650 | { | |
651 | CHECK_BUFFER (buffer, 0); | |
652 | buf = XBUFFER (buffer); | |
653 | } | |
654 | ||
336cd056 | 655 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
656 | } |
657 | ||
658 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
659 | 1, 1, 0, | |
660 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
661 | A non-nil FLAG means mark the buffer modified.") | |
662 | (flag) | |
663 | register Lisp_Object flag; | |
664 | { | |
665 | register int already; | |
666 | register Lisp_Object fn; | |
667 | ||
668 | #ifdef CLASH_DETECTION | |
669 | /* If buffer becoming modified, lock the file. | |
670 | If buffer becoming unmodified, unlock the file. */ | |
671 | ||
672 | fn = current_buffer->filename; | |
265a9e55 | 673 | if (!NILP (fn)) |
1ab256cb | 674 | { |
336cd056 | 675 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 676 | if (!already && !NILP (flag)) |
1ab256cb | 677 | lock_file (fn); |
265a9e55 | 678 | else if (already && NILP (flag)) |
1ab256cb RM |
679 | unlock_file (fn); |
680 | } | |
681 | #endif /* CLASH_DETECTION */ | |
682 | ||
336cd056 | 683 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
684 | update_mode_lines++; |
685 | return flag; | |
686 | } | |
687 | ||
688 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
689 | 0, 1, 0, | |
690 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
691 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
692 | that buffer is changed. It wraps around occasionally.\n\ | |
693 | No argument or nil as argument means use current buffer as BUFFER.") | |
694 | (buffer) | |
695 | register Lisp_Object buffer; | |
696 | { | |
697 | register struct buffer *buf; | |
265a9e55 | 698 | if (NILP (buffer)) |
1ab256cb RM |
699 | buf = current_buffer; |
700 | else | |
701 | { | |
702 | CHECK_BUFFER (buffer, 0); | |
703 | buf = XBUFFER (buffer); | |
704 | } | |
705 | ||
706 | return make_number (BUF_MODIFF (buf)); | |
707 | } | |
708 | \f | |
01050cb5 | 709 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 710 | "sRename buffer (to new name): \nP", |
1ab256cb | 711 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 712 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 713 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 714 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 715 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
716 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
717 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 718 | This does not change the name of the visited file (if any).") |
489c043a RS |
719 | (newname, unique) |
720 | register Lisp_Object newname, unique; | |
1ab256cb RM |
721 | { |
722 | register Lisp_Object tem, buf; | |
723 | ||
489c043a | 724 | CHECK_STRING (newname, 0); |
d59698c4 | 725 | |
489c043a | 726 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
727 | error ("Empty string is invalid as a buffer name"); |
728 | ||
489c043a | 729 | tem = Fget_buffer (newname); |
c059b5ea RM |
730 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
731 | the buffer automatically so you can create another with the original name. | |
732 | It makes UNIQUE equivalent to | |
489c043a | 733 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 734 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 735 | return current_buffer->name; |
265a9e55 | 736 | if (!NILP (tem)) |
01050cb5 | 737 | { |
3bd779aa | 738 | if (!NILP (unique)) |
489c043a | 739 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 740 | else |
489c043a | 741 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 742 | } |
1ab256cb | 743 | |
489c043a | 744 | current_buffer->name = newname; |
76f590d7 JB |
745 | |
746 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
747 | any windows displaying current_buffer will stay unchanged. */ | |
748 | update_mode_lines++; | |
749 | ||
67180c6a | 750 | XSETBUFFER (buf, current_buffer); |
489c043a | 751 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
752 | if (NILP (current_buffer->filename) |
753 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 754 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
755 | /* Refetch since that last call may have done GC. */ |
756 | return current_buffer->name; | |
1ab256cb RM |
757 | } |
758 | ||
a0ebb746 | 759 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 760 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
761 | Buffers not visible in windows are preferred to visible buffers,\n\ |
762 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
763 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
764 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
765 | (buffer, visible_ok) |
766 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
767 | { |
768 | register Lisp_Object tail, buf, notsogood, tem; | |
769 | notsogood = Qnil; | |
770 | ||
265a9e55 | 771 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
772 | { |
773 | buf = Fcdr (Fcar (tail)); | |
774 | if (EQ (buf, buffer)) | |
775 | continue; | |
776 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
777 | continue; | |
04ae1b48 RS |
778 | #ifdef MULTI_FRAME |
779 | /* If the selected frame has a buffer_predicate, | |
780 | disregard buffers that don't fit the predicate. */ | |
781 | tem = frame_buffer_predicate (); | |
782 | if (!NILP (tem)) | |
783 | { | |
784 | tem = call1 (tem, buf); | |
785 | if (NILP (tem)) | |
786 | continue; | |
787 | } | |
788 | #endif | |
789 | ||
a0ebb746 | 790 | if (NILP (visible_ok)) |
db732e5a | 791 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
792 | else |
793 | tem = Qnil; | |
265a9e55 | 794 | if (NILP (tem)) |
1ab256cb | 795 | return buf; |
265a9e55 | 796 | if (NILP (notsogood)) |
1ab256cb RM |
797 | notsogood = buf; |
798 | } | |
265a9e55 | 799 | if (!NILP (notsogood)) |
1ab256cb RM |
800 | return notsogood; |
801 | return Fget_buffer_create (build_string ("*scratch*")); | |
802 | } | |
803 | \f | |
5b8bcf48 | 804 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 805 | 0, |
5b8bcf48 RS |
806 | "Make BUFFER stop keeping undo information.\n\ |
807 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
808 | (buffer) |
809 | register Lisp_Object buffer; | |
1ab256cb | 810 | { |
ffd56f97 JB |
811 | Lisp_Object real_buffer; |
812 | ||
813 | if (NILP (buffer)) | |
67180c6a | 814 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
815 | else |
816 | { | |
817 | real_buffer = Fget_buffer (buffer); | |
818 | if (NILP (real_buffer)) | |
819 | nsberror (buffer); | |
820 | } | |
821 | ||
822 | XBUFFER (real_buffer)->undo_list = Qt; | |
823 | ||
1ab256cb RM |
824 | return Qnil; |
825 | } | |
826 | ||
827 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
828 | 0, 1, "", | |
829 | "Start keeping undo information for buffer BUFFER.\n\ | |
830 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
831 | (buffer) |
832 | register Lisp_Object buffer; | |
1ab256cb | 833 | { |
ffd56f97 | 834 | Lisp_Object real_buffer; |
1ab256cb | 835 | |
ffd56f97 | 836 | if (NILP (buffer)) |
67180c6a | 837 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
838 | else |
839 | { | |
ffd56f97 JB |
840 | real_buffer = Fget_buffer (buffer); |
841 | if (NILP (real_buffer)) | |
842 | nsberror (buffer); | |
1ab256cb RM |
843 | } |
844 | ||
ffd56f97 JB |
845 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
846 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
847 | |
848 | return Qnil; | |
849 | } | |
850 | ||
851 | /* | |
852 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
853 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
854 | The buffer being killed will be current while the hook is running.\n\ | |
855 | See `kill-buffer'." | |
856 | */ | |
857 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
858 | "Kill the buffer BUFFER.\n\ | |
859 | The argument may be a buffer or may be the name of a buffer.\n\ | |
860 | An argument of nil means kill the current buffer.\n\n\ | |
861 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
862 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
863 | if not void, is a list of functions to be called, with no arguments,\n\ | |
864 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
865 | when the hook functions are called.\n\n\ | |
866 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
867 | with `delete-process'.") | |
868 | (bufname) | |
869 | Lisp_Object bufname; | |
870 | { | |
871 | Lisp_Object buf; | |
872 | register struct buffer *b; | |
873 | register Lisp_Object tem; | |
874 | register struct Lisp_Marker *m; | |
875 | struct gcpro gcpro1, gcpro2; | |
876 | ||
265a9e55 | 877 | if (NILP (bufname)) |
1ab256cb RM |
878 | buf = Fcurrent_buffer (); |
879 | else | |
880 | buf = Fget_buffer (bufname); | |
265a9e55 | 881 | if (NILP (buf)) |
1ab256cb RM |
882 | nsberror (bufname); |
883 | ||
884 | b = XBUFFER (buf); | |
885 | ||
886 | /* Query if the buffer is still modified. */ | |
265a9e55 | 887 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 888 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb RM |
889 | { |
890 | GCPRO2 (buf, bufname); | |
891 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
892 | XSTRING (b->name)->data)); | |
893 | UNGCPRO; | |
265a9e55 | 894 | if (NILP (tem)) |
1ab256cb RM |
895 | return Qnil; |
896 | } | |
897 | ||
dcdffbf6 | 898 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
899 | { |
900 | register Lisp_Object val; | |
901 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 902 | Lisp_Object list; |
1ab256cb RM |
903 | |
904 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
905 | set_buffer_internal (b); | |
dcdffbf6 RS |
906 | |
907 | /* First run the query functions; if any query is answered no, | |
908 | don't kill the buffer. */ | |
909 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
910 | { | |
911 | tem = call0 (Fcar (list)); | |
912 | if (NILP (tem)) | |
913 | return unbind_to (count, Qnil); | |
914 | } | |
915 | ||
916 | /* Then run the hooks. */ | |
fd186f07 RS |
917 | if (!NILP (Vrun_hooks)) |
918 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
919 | unbind_to (count, Qnil); |
920 | } | |
921 | ||
922 | /* We have no more questions to ask. Verify that it is valid | |
923 | to kill the buffer. This must be done after the questions | |
924 | since anything can happen within do_yes_or_no_p. */ | |
925 | ||
926 | /* Don't kill the minibuffer now current. */ | |
927 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
928 | return Qnil; | |
929 | ||
265a9e55 | 930 | if (NILP (b->name)) |
1ab256cb RM |
931 | return Qnil; |
932 | ||
336cd056 RS |
933 | /* When we kill a base buffer, kill all its indirect buffers. |
934 | We do it at this stage so nothing terrible happens if they | |
935 | ask questions or their hooks get errors. */ | |
936 | if (! b->base_buffer) | |
937 | { | |
938 | struct buffer *other; | |
939 | ||
940 | GCPRO1 (buf); | |
941 | ||
942 | for (other = all_buffers; other; other = other->next) | |
943 | if (other->base_buffer == b) | |
944 | { | |
945 | Lisp_Object buf; | |
946 | XSETBUFFER (buf, other); | |
947 | Fkill_buffer (buf); | |
948 | } | |
949 | ||
950 | UNGCPRO; | |
951 | } | |
952 | ||
1ab256cb RM |
953 | /* Make this buffer not be current. |
954 | In the process, notice if this is the sole visible buffer | |
955 | and give up if so. */ | |
956 | if (b == current_buffer) | |
957 | { | |
172a9c1f | 958 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
959 | Fset_buffer (tem); |
960 | if (b == current_buffer) | |
961 | return Qnil; | |
962 | } | |
963 | ||
964 | /* Now there is no question: we can kill the buffer. */ | |
965 | ||
966 | #ifdef CLASH_DETECTION | |
967 | /* Unlock this buffer's file, if it is locked. */ | |
968 | unlock_buffer (b); | |
969 | #endif /* CLASH_DETECTION */ | |
970 | ||
1ab256cb | 971 | kill_buffer_processes (buf); |
1ab256cb RM |
972 | |
973 | tem = Vinhibit_quit; | |
974 | Vinhibit_quit = Qt; | |
975 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
976 | Freplace_buffer_in_windows (buf); | |
977 | Vinhibit_quit = tem; | |
978 | ||
9b59d6d0 | 979 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 980 | if (STRINGP (b->auto_save_file_name) |
9b59d6d0 | 981 | && b->auto_save_modified != 0) |
1ab256cb RM |
982 | { |
983 | Lisp_Object tem; | |
984 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 985 | if (! NILP (tem)) |
cbb6a418 | 986 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
987 | } |
988 | ||
336cd056 | 989 | if (! b->base_buffer) |
1ab256cb | 990 | { |
336cd056 RS |
991 | /* Unchain all markers of this buffer |
992 | and leave them pointing nowhere. */ | |
993 | for (tem = BUF_MARKERS (b); !EQ (tem, Qnil); ) | |
994 | { | |
995 | m = XMARKER (tem); | |
996 | m->buffer = 0; | |
997 | tem = m->chain; | |
998 | m->chain = Qnil; | |
999 | } | |
1000 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1001 | |
336cd056 RS |
1002 | #ifdef USE_TEXT_PROPERTIES |
1003 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1004 | #endif | |
1005 | ||
1006 | /* Perhaps we should explicitly free the interval tree here... */ | |
1007 | } | |
33f7013e | 1008 | |
1ab256cb | 1009 | b->name = Qnil; |
336cd056 | 1010 | |
9ac0d9e0 | 1011 | BLOCK_INPUT; |
336cd056 RS |
1012 | if (! b->base_buffer) |
1013 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1014 | ||
28e969dd JB |
1015 | if (b->newline_cache) |
1016 | { | |
1017 | free_region_cache (b->newline_cache); | |
1018 | b->newline_cache = 0; | |
1019 | } | |
1020 | if (b->width_run_cache) | |
1021 | { | |
1022 | free_region_cache (b->width_run_cache); | |
1023 | b->width_run_cache = 0; | |
1024 | } | |
1025 | b->width_table = Qnil; | |
9ac0d9e0 | 1026 | UNBLOCK_INPUT; |
1ab256cb RM |
1027 | b->undo_list = Qnil; |
1028 | ||
1029 | return Qt; | |
1030 | } | |
1031 | \f | |
36a8c287 JB |
1032 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1033 | we do this each time BUF is selected visibly, the more recently | |
1034 | selected buffers are always closer to the front of the list. This | |
1035 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1036 | |
1037 | record_buffer (buf) | |
1038 | Lisp_Object buf; | |
1039 | { | |
1040 | register Lisp_Object link, prev; | |
1041 | ||
1042 | prev = Qnil; | |
1043 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1044 | { | |
1045 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1046 | break; | |
1047 | prev = link; | |
1048 | } | |
1049 | ||
36a8c287 JB |
1050 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1051 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1052 | |
265a9e55 | 1053 | if (NILP (prev)) |
1ab256cb RM |
1054 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1055 | else | |
1056 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1057 | ||
1058 | XCONS(link)->cdr = Vbuffer_alist; | |
1059 | Vbuffer_alist = link; | |
1060 | } | |
1061 | ||
a9ee7a59 KH |
1062 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1063 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1064 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1065 | the current buffer's major mode.") | |
1066 | (buf) | |
1067 | Lisp_Object buf; | |
1068 | { | |
1069 | int count; | |
1070 | Lisp_Object function; | |
1071 | ||
1072 | function = buffer_defaults.major_mode; | |
1073 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1074 | function = current_buffer->major_mode; | |
1075 | ||
1076 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1077 | return Qnil; | |
1078 | ||
1079 | count = specpdl_ptr - specpdl; | |
1080 | ||
1081 | /* To select a nonfundamental mode, | |
1082 | select the buffer temporarily and then call the mode function. */ | |
1083 | ||
1084 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1085 | ||
1086 | Fset_buffer (buf); | |
1087 | call0 (function); | |
1088 | ||
1089 | return unbind_to (count, Qnil); | |
1090 | } | |
1091 | ||
1ab256cb RM |
1092 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1093 | "Select buffer BUFFER in the current window.\n\ | |
1094 | BUFFER may be a buffer or a buffer name.\n\ | |
1095 | Optional second arg NORECORD non-nil means\n\ | |
1096 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1097 | \n\ | |
1098 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1099 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1100 | the window-buffer correspondences.") | |
1101 | (bufname, norecord) | |
1102 | Lisp_Object bufname, norecord; | |
1103 | { | |
1104 | register Lisp_Object buf; | |
1105 | Lisp_Object tem; | |
1106 | ||
1107 | if (EQ (minibuf_window, selected_window)) | |
1108 | error ("Cannot switch buffers in minibuffer window"); | |
1109 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1110 | if (!NILP (tem)) |
1ab256cb RM |
1111 | error ("Cannot switch buffers in a dedicated window"); |
1112 | ||
265a9e55 | 1113 | if (NILP (bufname)) |
172a9c1f | 1114 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1115 | else |
a9ee7a59 KH |
1116 | { |
1117 | buf = Fget_buffer (bufname); | |
1118 | if (NILP (buf)) | |
1119 | { | |
1120 | buf = Fget_buffer_create (bufname); | |
1121 | Fset_buffer_major_mode (buf); | |
1122 | } | |
1123 | } | |
1ab256cb | 1124 | Fset_buffer (buf); |
265a9e55 | 1125 | if (NILP (norecord)) |
1ab256cb RM |
1126 | record_buffer (buf); |
1127 | ||
1128 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1129 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1130 | : selected_window, | |
1ab256cb RM |
1131 | buf); |
1132 | ||
e8b3a22d | 1133 | return buf; |
1ab256cb RM |
1134 | } |
1135 | ||
1136 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
1137 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
1138 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1139 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1140 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
1141 | window even if BUFFER is already visible in the selected window.") | |
1142 | (bufname, other) | |
1143 | Lisp_Object bufname, other; | |
1144 | { | |
1145 | register Lisp_Object buf; | |
265a9e55 | 1146 | if (NILP (bufname)) |
172a9c1f | 1147 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb RM |
1148 | else |
1149 | buf = Fget_buffer_create (bufname); | |
1150 | Fset_buffer (buf); | |
1151 | record_buffer (buf); | |
1152 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 1153 | return buf; |
1ab256cb RM |
1154 | } |
1155 | ||
1156 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1157 | "Return the current buffer as a Lisp object.") | |
1158 | () | |
1159 | { | |
1160 | register Lisp_Object buf; | |
67180c6a | 1161 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1162 | return buf; |
1163 | } | |
1164 | \f | |
1165 | /* Set the current buffer to b */ | |
1166 | ||
1167 | void | |
1168 | set_buffer_internal (b) | |
1169 | register struct buffer *b; | |
1170 | { | |
1171 | register struct buffer *old_buf; | |
1172 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1173 | Lisp_Object tem; |
1ab256cb RM |
1174 | |
1175 | if (current_buffer == b) | |
1176 | return; | |
1177 | ||
1178 | windows_or_buffers_changed = 1; | |
1179 | old_buf = current_buffer; | |
1180 | current_buffer = b; | |
1181 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1182 | ||
336cd056 RS |
1183 | if (old_buf) |
1184 | { | |
1185 | /* Put the undo list back in the base buffer, so that it appears | |
1186 | that an indirect buffer shares the undo list of its base. */ | |
1187 | if (old_buf->base_buffer) | |
1188 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1189 | ||
1190 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1191 | when it is not current, update them now. */ | |
1192 | if (! NILP (old_buf->pt_marker)) | |
1193 | { | |
1194 | Lisp_Object obuf; | |
1195 | XSETBUFFER (obuf, old_buf); | |
1196 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1197 | } | |
1198 | if (! NILP (old_buf->begv_marker)) | |
1199 | { | |
1200 | Lisp_Object obuf; | |
1201 | XSETBUFFER (obuf, old_buf); | |
1202 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1203 | } | |
1204 | if (! NILP (old_buf->zv_marker)) | |
1205 | { | |
1206 | Lisp_Object obuf; | |
1207 | XSETBUFFER (obuf, old_buf); | |
1208 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* Get the undo list from the base buffer, so that it appears | |
1213 | that an indirect buffer shares the undo list of its base. */ | |
1214 | if (b->base_buffer) | |
1215 | b->undo_list = b->base_buffer->undo_list; | |
1216 | ||
1217 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1218 | when it is not current, fetch them now. */ | |
1219 | if (! NILP (b->pt_marker)) | |
1220 | BUF_PT (b) = marker_position (b->pt_marker); | |
1221 | if (! NILP (b->begv_marker)) | |
1222 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1223 | if (! NILP (b->zv_marker)) | |
1224 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1225 | ||
1ab256cb RM |
1226 | /* Look down buffer's list of local Lisp variables |
1227 | to find and update any that forward into C variables. */ | |
1228 | ||
265a9e55 | 1229 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1230 | { |
1231 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1232 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1233 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1234 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1235 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1236 | /* Just reference the variable |
1237 | to cause it to become set for this buffer. */ | |
1238 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1239 | } | |
1240 | ||
1241 | /* Do the same with any others that were local to the previous buffer */ | |
1242 | ||
1243 | if (old_buf) | |
265a9e55 | 1244 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1245 | { |
1246 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1247 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1248 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1249 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1250 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1251 | /* Just reference the variable |
1252 | to cause it to become set for this buffer. */ | |
1253 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1254 | } | |
1255 | } | |
1256 | ||
336cd056 RS |
1257 | /* Switch to buffer B temporarily for redisplay purposes. |
1258 | This avoids certain things thatdon't need to be done within redisplay. */ | |
1259 | ||
1260 | void | |
1261 | set_buffer_temp (b) | |
1262 | struct buffer *b; | |
1263 | { | |
1264 | register struct buffer *old_buf; | |
1265 | ||
1266 | if (current_buffer == b) | |
1267 | return; | |
1268 | ||
1269 | old_buf = current_buffer; | |
1270 | current_buffer = b; | |
1271 | ||
1272 | if (old_buf) | |
1273 | { | |
1274 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1275 | when it is not current, update them now. */ | |
1276 | if (! NILP (old_buf->pt_marker)) | |
1277 | { | |
1278 | Lisp_Object obuf; | |
1279 | XSETBUFFER (obuf, old_buf); | |
1280 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1281 | } | |
1282 | if (! NILP (old_buf->begv_marker)) | |
1283 | { | |
1284 | Lisp_Object obuf; | |
1285 | XSETBUFFER (obuf, old_buf); | |
1286 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1287 | } | |
1288 | if (! NILP (old_buf->zv_marker)) | |
1289 | { | |
1290 | Lisp_Object obuf; | |
1291 | XSETBUFFER (obuf, old_buf); | |
1292 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1297 | when it is not current, fetch them now. */ | |
1298 | if (! NILP (b->pt_marker)) | |
1299 | BUF_PT (b) = marker_position (b->pt_marker); | |
1300 | if (! NILP (b->begv_marker)) | |
1301 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1302 | if (! NILP (b->zv_marker)) | |
1303 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1304 | } | |
1305 | ||
1ab256cb RM |
1306 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1307 | "Make the buffer BUFFER current for editing operations.\n\ | |
1308 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1309 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1310 | This function does not display the buffer, so its effect ends\n\ | |
1311 | when the current command terminates.\n\ | |
1312 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
1313 | (bufname) | |
1314 | register Lisp_Object bufname; | |
1315 | { | |
1316 | register Lisp_Object buffer; | |
1317 | buffer = Fget_buffer (bufname); | |
265a9e55 | 1318 | if (NILP (buffer)) |
1ab256cb | 1319 | nsberror (bufname); |
265a9e55 | 1320 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
1321 | error ("Selecting deleted buffer"); |
1322 | set_buffer_internal (XBUFFER (buffer)); | |
1323 | return buffer; | |
1324 | } | |
1325 | \f | |
1326 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1327 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1328 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1329 | () | |
1330 | { | |
a96b68f1 RS |
1331 | if (!NILP (current_buffer->read_only) |
1332 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1333 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1334 | return Qnil; | |
1335 | } | |
1336 | ||
1337 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1338 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1339 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1340 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1341 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1342 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1343 | selected window if it is displayed there.") | |
1ab256cb RM |
1344 | (buf) |
1345 | register Lisp_Object buf; | |
1346 | { | |
b271272a | 1347 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 1348 | if (NILP (buf)) |
a5611885 | 1349 | { |
67180c6a | 1350 | XSETBUFFER (buf, current_buffer); |
a5611885 JB |
1351 | |
1352 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1353 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1354 | } |
1ab256cb RM |
1355 | else |
1356 | { | |
1357 | Lisp_Object buf1; | |
1358 | ||
1359 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1360 | if (NILP (buf1)) |
1ab256cb RM |
1361 | nsberror (buf); |
1362 | buf = buf1; | |
b271272a JB |
1363 | } |
1364 | ||
a5611885 | 1365 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1366 | { |
1367 | register Lisp_Object aelt, link; | |
1368 | ||
1369 | aelt = Frassq (buf, Vbuffer_alist); | |
1370 | link = Fmemq (aelt, Vbuffer_alist); | |
1371 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1372 | XCONS (link)->cdr = Qnil; | |
1373 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1374 | } | |
1ab256cb | 1375 | |
1ab256cb RM |
1376 | return Qnil; |
1377 | } | |
1378 | \f | |
c922bc55 | 1379 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1380 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1381 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1382 | so the buffer is truly empty after this.") |
1383 | () | |
1384 | { | |
1385 | Fwiden (); | |
1386 | del_range (BEG, Z); | |
1387 | current_buffer->last_window_start = 1; | |
1388 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1389 | if future size is less than past size. Use of erase-buffer | |
1390 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1391 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1392 | return Qnil; |
1393 | } | |
1394 | ||
1395 | validate_region (b, e) | |
1396 | register Lisp_Object *b, *e; | |
1397 | { | |
1ab256cb RM |
1398 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1399 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1400 | ||
1401 | if (XINT (*b) > XINT (*e)) | |
1402 | { | |
03192067 KH |
1403 | Lisp_Object tem; |
1404 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1405 | } |
1406 | ||
1407 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1408 | && XINT (*e) <= ZV)) | |
1409 | args_out_of_range (*b, *e); | |
1410 | } | |
1411 | \f | |
1ab256cb RM |
1412 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1413 | 0, 0, 0, | |
1414 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1415 | Most local variable bindings are eliminated so that the default values\n\ | |
1416 | become effective once more. Also, the syntax table is set from\n\ | |
1417 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1418 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1419 | This function also forces redisplay of the mode line.\n\ | |
1420 | \n\ | |
1421 | Every function to select a new major mode starts by\n\ | |
1422 | calling this function.\n\n\ | |
1423 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1424 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1425 | \n\ | |
1426 | The first thing this function does is run\n\ | |
1427 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1428 | () |
1429 | { | |
1430 | register Lisp_Object alist, sym, tem; | |
1431 | Lisp_Object oalist; | |
7410477a | 1432 | |
fd186f07 RS |
1433 | if (!NILP (Vrun_hooks)) |
1434 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1435 | oalist = current_buffer->local_var_alist; |
1436 | ||
1437 | /* Make sure no local variables remain set up with this buffer | |
1438 | for their current values. */ | |
1439 | ||
265a9e55 | 1440 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1441 | { |
1442 | sym = XCONS (XCONS (alist)->car)->car; | |
1443 | ||
1444 | /* Need not do anything if some other buffer's binding is now encached. */ | |
6746ed7a | 1445 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; |
1ab256cb RM |
1446 | if (XBUFFER (tem) == current_buffer) |
1447 | { | |
1448 | /* Symbol is set up for this buffer's old local value. | |
1449 | Set it up for the current buffer with the default value. */ | |
1450 | ||
6746ed7a | 1451 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; |
542143d7 RS |
1452 | /* Store the symbol's current value into the alist entry |
1453 | it is currently set up for. This is so that, if the | |
1454 | local is marked permanent, and we make it local again below, | |
1455 | we don't lose the value. */ | |
2735b685 | 1456 | XCONS (XCONS (tem)->car)->cdr |
6746ed7a | 1457 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); |
542143d7 | 1458 | /* Switch to the symbol's default-value alist entry. */ |
1ab256cb | 1459 | XCONS (tem)->car = tem; |
542143d7 | 1460 | /* Mark it as current for the current buffer. */ |
6746ed7a KH |
1461 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car |
1462 | = Fcurrent_buffer (); | |
542143d7 | 1463 | /* Store the current value into any forwarding in the symbol. */ |
6746ed7a | 1464 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, |
1ab256cb RM |
1465 | XCONS (tem)->cdr); |
1466 | } | |
1467 | } | |
1468 | ||
1469 | /* Actually eliminate all local bindings of this buffer. */ | |
1470 | ||
1471 | reset_buffer_local_variables (current_buffer); | |
1472 | ||
1473 | /* Redisplay mode lines; we are changing major mode. */ | |
1474 | ||
1475 | update_mode_lines++; | |
1476 | ||
1477 | /* Any which are supposed to be permanent, | |
1478 | make local again, with the same values they had. */ | |
1479 | ||
265a9e55 | 1480 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1481 | { |
1482 | sym = XCONS (XCONS (alist)->car)->car; | |
1483 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1484 | if (! NILP (tem)) |
01050cb5 RM |
1485 | { |
1486 | Fmake_local_variable (sym); | |
1487 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1488 | } | |
1ab256cb RM |
1489 | } |
1490 | ||
1491 | /* Force mode-line redisplay. Useful here because all major mode | |
1492 | commands call this function. */ | |
1493 | update_mode_lines++; | |
1494 | ||
1495 | return Qnil; | |
1496 | } | |
1497 | \f | |
2eec3b4e RS |
1498 | /* Find all the overlays in the current buffer that contain position POS. |
1499 | Return the number found, and store them in a vector in *VEC_PTR. | |
1500 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1501 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1502 | or ZV if there are no more overlays. | |
239c932b RS |
1503 | Store in *PREV_PTR the previous position after POS where an overlay ends, |
1504 | or BEGV if there are no previous overlays. | |
1505 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1506 | |
1507 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1508 | when this function is called. |
1509 | ||
1510 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1511 | If EXTEND is zero, we never extend the vector, | |
1512 | and we store only as many overlays as will fit. | |
1513 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1514 | |
1515 | int | |
239c932b | 1516 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1517 | int pos; |
61d54cd5 | 1518 | int extend; |
2eec3b4e RS |
1519 | Lisp_Object **vec_ptr; |
1520 | int *len_ptr; | |
1521 | int *next_ptr; | |
239c932b | 1522 | int *prev_ptr; |
1ab256cb | 1523 | { |
2eec3b4e RS |
1524 | Lisp_Object tail, overlay, start, end, result; |
1525 | int idx = 0; | |
1526 | int len = *len_ptr; | |
1527 | Lisp_Object *vec = *vec_ptr; | |
1528 | int next = ZV; | |
239c932b | 1529 | int prev = BEGV; |
61d54cd5 RS |
1530 | int inhibit_storing = 0; |
1531 | ||
2eec3b4e | 1532 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1533 | GC_CONSP (tail); |
2eec3b4e RS |
1534 | tail = XCONS (tail)->cdr) |
1535 | { | |
239c932b | 1536 | int startpos, endpos; |
52f8ec73 | 1537 | |
2eec3b4e | 1538 | overlay = XCONS (tail)->car; |
1ab256cb | 1539 | |
2eec3b4e RS |
1540 | start = OVERLAY_START (overlay); |
1541 | end = OVERLAY_END (overlay); | |
239c932b RS |
1542 | endpos = OVERLAY_POSITION (end); |
1543 | if (endpos < pos) | |
1544 | { | |
1545 | if (prev < endpos) | |
1546 | prev = endpos; | |
1547 | break; | |
1548 | } | |
1549 | if (endpos == pos) | |
1550 | continue; | |
2eec3b4e RS |
1551 | startpos = OVERLAY_POSITION (start); |
1552 | if (startpos <= pos) | |
1553 | { | |
1554 | if (idx == len) | |
1555 | { | |
61d54cd5 RS |
1556 | /* The supplied vector is full. |
1557 | Either make it bigger, or don't store any more in it. */ | |
1558 | if (extend) | |
1559 | { | |
1560 | *len_ptr = len *= 2; | |
1561 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1562 | *vec_ptr = vec; | |
1563 | } | |
1564 | else | |
1565 | inhibit_storing = 1; | |
2eec3b4e | 1566 | } |
61d54cd5 RS |
1567 | |
1568 | if (!inhibit_storing) | |
1569 | vec[idx] = overlay; | |
1570 | /* Keep counting overlays even if we can't return them all. */ | |
1571 | idx++; | |
2eec3b4e RS |
1572 | } |
1573 | else if (startpos < next) | |
1574 | next = startpos; | |
1575 | } | |
1576 | ||
1577 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1578 | GC_CONSP (tail); |
2eec3b4e | 1579 | tail = XCONS (tail)->cdr) |
1ab256cb | 1580 | { |
239c932b | 1581 | int startpos, endpos; |
52f8ec73 | 1582 | |
2eec3b4e | 1583 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1584 | |
1585 | start = OVERLAY_START (overlay); | |
1586 | end = OVERLAY_END (overlay); | |
1587 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1588 | if (pos < startpos) |
2eec3b4e RS |
1589 | { |
1590 | if (startpos < next) | |
1591 | next = startpos; | |
1592 | break; | |
1593 | } | |
239c932b RS |
1594 | endpos = OVERLAY_POSITION (end); |
1595 | if (pos < endpos) | |
2eec3b4e RS |
1596 | { |
1597 | if (idx == len) | |
1598 | { | |
61d54cd5 RS |
1599 | if (extend) |
1600 | { | |
1601 | *len_ptr = len *= 2; | |
1602 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1603 | *vec_ptr = vec; | |
1604 | } | |
1605 | else | |
1606 | inhibit_storing = 1; | |
2eec3b4e | 1607 | } |
61d54cd5 RS |
1608 | |
1609 | if (!inhibit_storing) | |
1610 | vec[idx] = overlay; | |
1611 | idx++; | |
2eec3b4e | 1612 | } |
239c932b RS |
1613 | else if (endpos < pos && endpos > prev) |
1614 | prev = endpos; | |
1ab256cb RM |
1615 | } |
1616 | ||
239c932b RS |
1617 | if (next_ptr) |
1618 | *next_ptr = next; | |
1619 | if (prev_ptr) | |
1620 | *prev_ptr = prev; | |
2eec3b4e RS |
1621 | return idx; |
1622 | } | |
1623 | \f | |
5985d248 KH |
1624 | struct sortvec |
1625 | { | |
1626 | Lisp_Object overlay; | |
1627 | int beg, end; | |
1628 | int priority; | |
1629 | }; | |
1630 | ||
1631 | static int | |
1632 | compare_overlays (s1, s2) | |
1633 | struct sortvec *s1, *s2; | |
1634 | { | |
1635 | if (s1->priority != s2->priority) | |
1636 | return s1->priority - s2->priority; | |
1637 | if (s1->beg != s2->beg) | |
1638 | return s1->beg - s2->beg; | |
1639 | if (s1->end != s2->end) | |
1640 | return s2->end - s1->end; | |
1641 | return 0; | |
1642 | } | |
1643 | ||
1644 | /* Sort an array of overlays by priority. The array is modified in place. | |
1645 | The return value is the new size; this may be smaller than the original | |
1646 | size if some of the overlays were invalid or were window-specific. */ | |
1647 | int | |
1648 | sort_overlays (overlay_vec, noverlays, w) | |
1649 | Lisp_Object *overlay_vec; | |
1650 | int noverlays; | |
1651 | struct window *w; | |
1652 | { | |
1653 | int i, j; | |
1654 | struct sortvec *sortvec; | |
1655 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1656 | ||
1657 | /* Put the valid and relevant overlays into sortvec. */ | |
1658 | ||
1659 | for (i = 0, j = 0; i < noverlays; i++) | |
1660 | { | |
0fa767e7 | 1661 | Lisp_Object tem; |
c99fc30f | 1662 | Lisp_Object overlay; |
5985d248 | 1663 | |
c99fc30f | 1664 | overlay = overlay_vec[i]; |
5985d248 KH |
1665 | if (OVERLAY_VALID (overlay) |
1666 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1667 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1668 | { | |
0fa767e7 KH |
1669 | /* If we're interested in a specific window, then ignore |
1670 | overlays that are limited to some other window. */ | |
1671 | if (w) | |
5985d248 | 1672 | { |
0fa767e7 KH |
1673 | Lisp_Object window; |
1674 | ||
1675 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 1676 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 1677 | continue; |
5985d248 | 1678 | } |
0fa767e7 KH |
1679 | |
1680 | /* This overlay is good and counts: put it into sortvec. */ | |
1681 | sortvec[j].overlay = overlay; | |
1682 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1683 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1684 | tem = Foverlay_get (overlay, Qpriority); | |
1685 | if (INTEGERP (tem)) | |
1686 | sortvec[j].priority = XINT (tem); | |
1687 | else | |
1688 | sortvec[j].priority = 0; | |
1689 | j++; | |
5985d248 KH |
1690 | } |
1691 | } | |
1692 | noverlays = j; | |
1693 | ||
1694 | /* Sort the overlays into the proper order: increasing priority. */ | |
1695 | ||
1696 | if (noverlays > 1) | |
1697 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1698 | ||
1699 | for (i = 0; i < noverlays; i++) | |
1700 | overlay_vec[i] = sortvec[i].overlay; | |
1701 | return (noverlays); | |
1702 | } | |
1703 | \f | |
5c4f68f1 | 1704 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1705 | |
2eec3b4e | 1706 | void |
5c4f68f1 JB |
1707 | recenter_overlay_lists (buf, pos) |
1708 | struct buffer *buf; | |
2eec3b4e RS |
1709 | int pos; |
1710 | { | |
1711 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1712 | ||
1713 | /* See if anything in overlays_before should move to overlays_after. */ | |
1714 | ||
1715 | /* We don't strictly need prev in this loop; it should always be nil. | |
1716 | But we use it for symmetry and in case that should cease to be true | |
1717 | with some future change. */ | |
1718 | prev = Qnil; | |
5c4f68f1 | 1719 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1720 | CONSP (tail); |
1721 | prev = tail, tail = next) | |
1ab256cb | 1722 | { |
2eec3b4e RS |
1723 | next = XCONS (tail)->cdr; |
1724 | overlay = XCONS (tail)->car; | |
1725 | ||
1726 | /* If the overlay is not valid, get rid of it. */ | |
1727 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1728 | #if 1 |
1729 | abort (); | |
1730 | #else | |
2eec3b4e RS |
1731 | { |
1732 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1733 | if (!NILP (prev)) | |
1734 | XCONS (prev)->cdr = next; | |
1735 | else | |
5c4f68f1 | 1736 | buf->overlays_before = next; |
2eec3b4e RS |
1737 | tail = prev; |
1738 | continue; | |
1739 | } | |
52f8ec73 | 1740 | #endif |
1ab256cb | 1741 | |
2eec3b4e RS |
1742 | beg = OVERLAY_START (overlay); |
1743 | end = OVERLAY_END (overlay); | |
1ab256cb | 1744 | |
2eec3b4e | 1745 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1746 | { |
2eec3b4e RS |
1747 | /* OVERLAY needs to be moved. */ |
1748 | int where = OVERLAY_POSITION (beg); | |
1749 | Lisp_Object other, other_prev; | |
1750 | ||
1751 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1752 | if (!NILP (prev)) | |
1753 | XCONS (prev)->cdr = next; | |
1754 | else | |
5c4f68f1 | 1755 | buf->overlays_before = next; |
2eec3b4e RS |
1756 | |
1757 | /* Search thru overlays_after for where to put it. */ | |
1758 | other_prev = Qnil; | |
5c4f68f1 | 1759 | for (other = buf->overlays_after; |
2eec3b4e RS |
1760 | CONSP (other); |
1761 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1762 | { |
2eec3b4e RS |
1763 | Lisp_Object otherbeg, otheroverlay, follower; |
1764 | int win; | |
1765 | ||
1766 | otheroverlay = XCONS (other)->car; | |
1767 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1768 | abort (); |
2eec3b4e RS |
1769 | |
1770 | otherbeg = OVERLAY_START (otheroverlay); | |
1771 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1772 | break; | |
1ab256cb | 1773 | } |
2eec3b4e RS |
1774 | |
1775 | /* Add TAIL to overlays_after before OTHER. */ | |
1776 | XCONS (tail)->cdr = other; | |
1777 | if (!NILP (other_prev)) | |
1778 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1779 | else |
5c4f68f1 | 1780 | buf->overlays_after = tail; |
2eec3b4e | 1781 | tail = prev; |
1ab256cb | 1782 | } |
2eec3b4e RS |
1783 | else |
1784 | /* We've reached the things that should stay in overlays_before. | |
1785 | All the rest of overlays_before must end even earlier, | |
1786 | so stop now. */ | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | /* See if anything in overlays_after should be in overlays_before. */ | |
1791 | prev = Qnil; | |
5c4f68f1 | 1792 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1793 | CONSP (tail); |
1794 | prev = tail, tail = next) | |
1795 | { | |
1796 | next = XCONS (tail)->cdr; | |
1797 | overlay = XCONS (tail)->car; | |
1798 | ||
1799 | /* If the overlay is not valid, get rid of it. */ | |
1800 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1801 | #if 1 |
1802 | abort (); | |
1803 | #else | |
2eec3b4e RS |
1804 | { |
1805 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1806 | if (!NILP (prev)) | |
1807 | XCONS (prev)->cdr = next; | |
1808 | else | |
5c4f68f1 | 1809 | buf->overlays_after = next; |
2eec3b4e RS |
1810 | tail = prev; |
1811 | continue; | |
1812 | } | |
52f8ec73 | 1813 | #endif |
2eec3b4e RS |
1814 | |
1815 | beg = OVERLAY_START (overlay); | |
1816 | end = OVERLAY_END (overlay); | |
1817 | ||
1818 | /* Stop looking, when we know that nothing further | |
1819 | can possibly end before POS. */ | |
1820 | if (OVERLAY_POSITION (beg) > pos) | |
1821 | break; | |
1822 | ||
1823 | if (OVERLAY_POSITION (end) <= pos) | |
1824 | { | |
1825 | /* OVERLAY needs to be moved. */ | |
1826 | int where = OVERLAY_POSITION (end); | |
1827 | Lisp_Object other, other_prev; | |
1828 | ||
1829 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1830 | if (!NILP (prev)) | |
1831 | XCONS (prev)->cdr = next; | |
1832 | else | |
5c4f68f1 | 1833 | buf->overlays_after = next; |
2eec3b4e RS |
1834 | |
1835 | /* Search thru overlays_before for where to put it. */ | |
1836 | other_prev = Qnil; | |
5c4f68f1 | 1837 | for (other = buf->overlays_before; |
2eec3b4e RS |
1838 | CONSP (other); |
1839 | other_prev = other, other = XCONS (other)->cdr) | |
1840 | { | |
1841 | Lisp_Object otherend, otheroverlay; | |
1842 | int win; | |
1843 | ||
1844 | otheroverlay = XCONS (other)->car; | |
1845 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1846 | abort (); |
2eec3b4e RS |
1847 | |
1848 | otherend = OVERLAY_END (otheroverlay); | |
1849 | if (OVERLAY_POSITION (otherend) <= where) | |
1850 | break; | |
1851 | } | |
1852 | ||
1853 | /* Add TAIL to overlays_before before OTHER. */ | |
1854 | XCONS (tail)->cdr = other; | |
1855 | if (!NILP (other_prev)) | |
1856 | XCONS (other_prev)->cdr = tail; | |
1857 | else | |
5c4f68f1 | 1858 | buf->overlays_before = tail; |
2eec3b4e RS |
1859 | tail = prev; |
1860 | } | |
1861 | } | |
1862 | ||
8d7a4592 | 1863 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 1864 | } |
2b1bdf65 KH |
1865 | |
1866 | /* Fix up overlays that were garbled as a result of permuting markers | |
1867 | in the range START through END. Any overlay with at least one | |
1868 | endpoint in this range will need to be unlinked from the overlay | |
1869 | list and reinserted in its proper place. | |
1870 | Such an overlay might even have negative size at this point. | |
1871 | If so, we'll reverse the endpoints. Can you think of anything | |
1872 | better to do in this situation? */ | |
1873 | void | |
1874 | fix_overlays_in_range (start, end) | |
1875 | register int start, end; | |
1876 | { | |
1877 | Lisp_Object tem, overlay; | |
1878 | Lisp_Object before_list, after_list; | |
1879 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
1880 | int startpos, endpos; | |
1881 | ||
1882 | /* This algorithm shifts links around instead of consing and GCing. | |
1883 | The loop invariant is that before_list (resp. after_list) is a | |
1884 | well-formed list except that its last element, the one that | |
1885 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
1886 | So it's not a bug that before_list isn't initialized, although | |
1887 | it may look strange. */ | |
1888 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
1889 | { | |
1890 | overlay = XCONS (*ptail)->car; | |
1891 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1892 | if (endpos < start) | |
1893 | break; | |
1894 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1895 | if (endpos < end | |
1896 | || (startpos >= start && startpos < end)) | |
1897 | { | |
1898 | /* If the overlay is backwards, fix that now. */ | |
1899 | if (startpos > endpos) | |
1900 | { | |
1901 | int tem; | |
1902 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1903 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1904 | tem = startpos; startpos = endpos; endpos = tem; | |
1905 | } | |
1906 | /* Add it to the end of the wrong list. Later on, | |
1907 | recenter_overlay_lists will move it to the right place. */ | |
1908 | if (endpos < XINT (current_buffer->overlay_center)) | |
1909 | { | |
1910 | *pafter = *ptail; | |
1911 | pafter = &XCONS (*ptail)->cdr; | |
1912 | } | |
1913 | else | |
1914 | { | |
1915 | *pbefore = *ptail; | |
1916 | pbefore = &XCONS (*ptail)->cdr; | |
1917 | } | |
1918 | *ptail = XCONS (*ptail)->cdr; | |
1919 | } | |
1920 | else | |
1921 | ptail = &XCONS (*ptail)->cdr; | |
1922 | } | |
1923 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
1924 | { | |
1925 | overlay = XCONS (*ptail)->car; | |
1926 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1927 | if (startpos >= end) | |
1928 | break; | |
1929 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1930 | if (startpos >= start | |
1931 | || (endpos >= start && endpos < end)) | |
1932 | { | |
1933 | if (startpos > endpos) | |
1934 | { | |
1935 | int tem; | |
1936 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1937 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1938 | tem = startpos; startpos = endpos; endpos = tem; | |
1939 | } | |
1940 | if (endpos < XINT (current_buffer->overlay_center)) | |
1941 | { | |
1942 | *pafter = *ptail; | |
1943 | pafter = &XCONS (*ptail)->cdr; | |
1944 | } | |
1945 | else | |
1946 | { | |
1947 | *pbefore = *ptail; | |
1948 | pbefore = &XCONS (*ptail)->cdr; | |
1949 | } | |
1950 | *ptail = XCONS (*ptail)->cdr; | |
1951 | } | |
1952 | else | |
1953 | ptail = &XCONS (*ptail)->cdr; | |
1954 | } | |
1955 | ||
1956 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
1957 | and let the recenter function make it sane again. */ | |
1958 | *pbefore = current_buffer->overlays_before; | |
1959 | current_buffer->overlays_before = before_list; | |
1960 | recenter_overlay_lists (current_buffer, | |
1961 | XINT (current_buffer->overlay_center)); | |
1962 | ||
1963 | *pafter = current_buffer->overlays_after; | |
1964 | current_buffer->overlays_after = after_list; | |
1965 | recenter_overlay_lists (current_buffer, | |
1966 | XINT (current_buffer->overlay_center)); | |
1967 | } | |
2eec3b4e | 1968 | \f |
52f8ec73 JB |
1969 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1970 | "Return t if OBJECT is an overlay.") | |
1971 | (object) | |
1972 | Lisp_Object object; | |
1973 | { | |
1974 | return (OVERLAYP (object) ? Qt : Qnil); | |
1975 | } | |
1976 | ||
5c4f68f1 JB |
1977 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1978 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1979 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1980 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1981 | (beg, end, buffer) |
1982 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1983 | { |
1984 | Lisp_Object overlay; | |
5c4f68f1 | 1985 | struct buffer *b; |
2eec3b4e | 1986 | |
5c4f68f1 | 1987 | if (NILP (buffer)) |
67180c6a | 1988 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
1989 | else |
1990 | CHECK_BUFFER (buffer, 2); | |
1991 | if (MARKERP (beg) | |
1992 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
1993 | error ("Marker points into wrong buffer"); | |
1994 | if (MARKERP (end) | |
1995 | && ! EQ (Fmarker_buffer (end), buffer)) | |
1996 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 1997 | |
883047b9 JB |
1998 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
1999 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2000 | |
883047b9 | 2001 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2002 | { |
c99fc30f KH |
2003 | Lisp_Object temp; |
2004 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2005 | } |
883047b9 JB |
2006 | |
2007 | b = XBUFFER (buffer); | |
2008 | ||
2009 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2010 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2011 | |
48e2e3ba KH |
2012 | overlay = allocate_misc (); |
2013 | XMISC (overlay)->type = Lisp_Misc_Overlay; | |
2014 | XOVERLAY (overlay)->start = beg; | |
2015 | XOVERLAY (overlay)->end = end; | |
2016 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2017 | |
2018 | /* Put the new overlay on the wrong list. */ | |
2019 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2020 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2021 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2022 | else |
5c4f68f1 | 2023 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2024 | |
2025 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2026 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2027 | |
b61982dd JB |
2028 | /* We don't need to redisplay the region covered by the overlay, because |
2029 | the overlay has no properties at the moment. */ | |
2030 | ||
2eec3b4e RS |
2031 | return overlay; |
2032 | } | |
2033 | ||
5c4f68f1 JB |
2034 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2035 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2036 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2037 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2038 | buffer.") | |
5c4f68f1 JB |
2039 | (overlay, beg, end, buffer) |
2040 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2041 | { |
0a4469c9 RS |
2042 | struct buffer *b, *ob; |
2043 | Lisp_Object obuffer; | |
2044 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2045 | |
52f8ec73 | 2046 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2047 | if (NILP (buffer)) |
2048 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2049 | if (NILP (buffer)) |
67180c6a | 2050 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2051 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2052 | |
2053 | if (MARKERP (beg) | |
2054 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2055 | error ("Marker points into wrong buffer"); | |
2056 | if (MARKERP (end) | |
2057 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2058 | error ("Marker points into wrong buffer"); | |
2059 | ||
b61982dd JB |
2060 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2061 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2062 | ||
9d7608b7 KH |
2063 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2064 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2065 | |
b61982dd JB |
2066 | if (XINT (beg) > XINT (end)) |
2067 | { | |
c99fc30f KH |
2068 | Lisp_Object temp; |
2069 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2070 | } |
2071 | ||
9d7608b7 KH |
2072 | specbind (Qinhibit_quit, Qt); |
2073 | ||
0a4469c9 | 2074 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2075 | b = XBUFFER (buffer); |
0a4469c9 | 2076 | ob = XBUFFER (obuffer); |
2eec3b4e | 2077 | |
c82ed728 | 2078 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2079 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2080 | { |
2081 | /* Redisplay where the overlay was. */ | |
2082 | if (!NILP (obuffer)) | |
2083 | { | |
2084 | Lisp_Object o_beg; | |
2085 | Lisp_Object o_end; | |
2086 | ||
2087 | o_beg = OVERLAY_START (overlay); | |
2088 | o_end = OVERLAY_END (overlay); | |
2089 | o_beg = OVERLAY_POSITION (o_beg); | |
2090 | o_end = OVERLAY_POSITION (o_end); | |
2091 | ||
efd90478 | 2092 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2093 | } |
2094 | ||
2095 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 2096 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a RS |
2097 | |
2098 | /* Don't limit redisplay to the selected window. */ | |
2099 | windows_or_buffers_changed = 1; | |
2100 | } | |
c82ed728 JB |
2101 | else |
2102 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2103 | { | |
be8b1c6b RS |
2104 | Lisp_Object o_beg; |
2105 | Lisp_Object o_end; | |
c82ed728 JB |
2106 | int change_beg, change_end; |
2107 | ||
be8b1c6b RS |
2108 | o_beg = OVERLAY_START (overlay); |
2109 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
2110 | o_beg = OVERLAY_POSITION (o_beg); |
2111 | o_end = OVERLAY_POSITION (o_end); | |
2112 | ||
2113 | if (XINT (o_beg) == XINT (beg)) | |
2114 | redisplay_region (b, XINT (o_end), XINT (end)); | |
2115 | else if (XINT (o_end) == XINT (end)) | |
2116 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
2117 | else | |
2118 | { | |
2119 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2120 | if (XINT (end) > XINT (o_end)) o_end = end; | |
2121 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
2122 | } | |
2123 | } | |
b61982dd | 2124 | |
0a4469c9 RS |
2125 | if (!NILP (obuffer)) |
2126 | { | |
2127 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2128 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2129 | } | |
5c4f68f1 JB |
2130 | |
2131 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2132 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2133 | |
2134 | /* Put the overlay on the wrong list. */ | |
2135 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2136 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2137 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2138 | else |
5c4f68f1 | 2139 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2140 | |
2141 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2142 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2143 | |
0a4469c9 | 2144 | return unbind_to (count, overlay); |
2eec3b4e RS |
2145 | } |
2146 | ||
2147 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2148 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2149 | (overlay) |
5c4f68f1 | 2150 | Lisp_Object overlay; |
2eec3b4e | 2151 | { |
0a4469c9 | 2152 | Lisp_Object buffer; |
5c4f68f1 | 2153 | struct buffer *b; |
0a4469c9 | 2154 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2155 | |
52f8ec73 JB |
2156 | CHECK_OVERLAY (overlay, 0); |
2157 | ||
0a4469c9 RS |
2158 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2159 | if (NILP (buffer)) | |
2160 | return Qnil; | |
2161 | ||
2162 | b = XBUFFER (buffer); | |
2163 | ||
2164 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2165 | |
2166 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2167 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2168 | ||
b61982dd | 2169 | redisplay_region (b, |
a927f5c9 RS |
2170 | marker_position (OVERLAY_START (overlay)), |
2171 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2172 | |
3ece337a JB |
2173 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2174 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2175 | ||
0a4469c9 | 2176 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2177 | } |
2178 | \f | |
8ebafa8d JB |
2179 | /* Overlay dissection functions. */ |
2180 | ||
2181 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2182 | "Return the position at which OVERLAY starts.") | |
2183 | (overlay) | |
2184 | Lisp_Object overlay; | |
2185 | { | |
2186 | CHECK_OVERLAY (overlay, 0); | |
2187 | ||
2188 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2189 | } | |
2190 | ||
2191 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2192 | "Return the position at which OVERLAY ends.") | |
2193 | (overlay) | |
2194 | Lisp_Object overlay; | |
2195 | { | |
2196 | CHECK_OVERLAY (overlay, 0); | |
2197 | ||
2198 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2199 | } | |
2200 | ||
2201 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2202 | "Return the buffer OVERLAY belongs to.") | |
2203 | (overlay) | |
2204 | Lisp_Object overlay; | |
2205 | { | |
2206 | CHECK_OVERLAY (overlay, 0); | |
2207 | ||
2208 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2209 | } | |
2210 | ||
2211 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2212 | "Return a list of the properties on OVERLAY.\n\ | |
2213 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2214 | OVERLAY.") | |
2215 | (overlay) | |
2216 | Lisp_Object overlay; | |
2217 | { | |
2218 | CHECK_OVERLAY (overlay, 0); | |
2219 | ||
48e2e3ba | 2220 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2221 | } |
2222 | ||
2223 | \f | |
2eec3b4e | 2224 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2225 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2226 | (pos) |
2227 | Lisp_Object pos; | |
2228 | { | |
2229 | int noverlays; | |
2eec3b4e RS |
2230 | Lisp_Object *overlay_vec; |
2231 | int len; | |
2232 | Lisp_Object result; | |
2233 | ||
2234 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2235 | ||
2236 | len = 10; | |
2237 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2238 | ||
2239 | /* Put all the overlays we want in a vector in overlay_vec. | |
2240 | Store the length in len. */ | |
239c932b | 2241 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, NULL); |
2eec3b4e RS |
2242 | |
2243 | /* Make a list of them all. */ | |
2244 | result = Flist (noverlays, overlay_vec); | |
2245 | ||
9ac0d9e0 | 2246 | xfree (overlay_vec); |
2eec3b4e RS |
2247 | return result; |
2248 | } | |
2249 | ||
2250 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
2251 | 1, 1, 0, | |
bbe20e81 KH |
2252 | "Return the next position after POS where an overlay starts or ends.\n\ |
2253 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2254 | (pos) |
2255 | Lisp_Object pos; | |
2256 | { | |
2257 | int noverlays; | |
2258 | int endpos; | |
2259 | Lisp_Object *overlay_vec; | |
2260 | int len; | |
2eec3b4e RS |
2261 | int i; |
2262 | ||
2263 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2264 | ||
2265 | len = 10; | |
2266 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2267 | ||
2268 | /* Put all the overlays we want in a vector in overlay_vec. | |
2269 | Store the length in len. | |
2270 | endpos gets the position where the next overlay starts. */ | |
239c932b | 2271 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos, NULL); |
2eec3b4e RS |
2272 | |
2273 | /* If any of these overlays ends before endpos, | |
2274 | use its ending point instead. */ | |
2275 | for (i = 0; i < noverlays; i++) | |
2276 | { | |
2277 | Lisp_Object oend; | |
2278 | int oendpos; | |
2279 | ||
2280 | oend = OVERLAY_END (overlay_vec[i]); | |
2281 | oendpos = OVERLAY_POSITION (oend); | |
2282 | if (oendpos < endpos) | |
2283 | endpos = oendpos; | |
1ab256cb RM |
2284 | } |
2285 | ||
9ac0d9e0 | 2286 | xfree (overlay_vec); |
2eec3b4e RS |
2287 | return make_number (endpos); |
2288 | } | |
239c932b RS |
2289 | |
2290 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2291 | Sprevious_overlay_change, 1, 1, 0, | |
2292 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
2293 | If there are no more overlay boundaries after POS, return (point-min).") | |
2294 | (pos) | |
2295 | Lisp_Object pos; | |
2296 | { | |
2297 | int noverlays; | |
2298 | int prevpos; | |
2299 | Lisp_Object *overlay_vec; | |
2300 | int len; | |
2301 | int i; | |
2302 | ||
2303 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2304 | ||
2305 | len = 10; | |
2306 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2307 | ||
2308 | /* Put all the overlays we want in a vector in overlay_vec. | |
2309 | Store the length in len. | |
2310 | prevpos gets the position of an overlay end. */ | |
2311 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, &prevpos); | |
2312 | ||
2313 | /* If any of these overlays starts before endpos, | |
2314 | maybe use its starting point instead. */ | |
2315 | for (i = 0; i < noverlays; i++) | |
2316 | { | |
2317 | Lisp_Object ostart; | |
2318 | int ostartpos; | |
2319 | ||
2320 | ostart = OVERLAY_START (overlay_vec[i]); | |
2321 | ostartpos = OVERLAY_POSITION (ostart); | |
2322 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2323 | prevpos = ostartpos; | |
2324 | } | |
2325 | ||
2326 | xfree (overlay_vec); | |
2327 | return make_number (prevpos); | |
2328 | } | |
2eec3b4e RS |
2329 | \f |
2330 | /* These functions are for debugging overlays. */ | |
2331 | ||
2332 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2333 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2334 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2335 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2336 | Recentering overlays moves overlays between these lists.\n\ |
2337 | The lists you get are copies, so that changing them has no effect.\n\ | |
2338 | However, the overlays you get are the real objects that the buffer uses.") | |
2339 | () | |
2340 | { | |
2341 | Lisp_Object before, after; | |
2342 | before = current_buffer->overlays_before; | |
2343 | if (CONSP (before)) | |
2344 | before = Fcopy_sequence (before); | |
2345 | after = current_buffer->overlays_after; | |
2346 | if (CONSP (after)) | |
2347 | after = Fcopy_sequence (after); | |
2348 | ||
2349 | return Fcons (before, after); | |
2350 | } | |
2351 | ||
2352 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2353 | "Recenter the overlays of the current buffer around position POS.") | |
2354 | (pos) | |
2355 | Lisp_Object pos; | |
2356 | { | |
2357 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2358 | ||
5c4f68f1 | 2359 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2360 | return Qnil; |
2361 | } | |
2362 | \f | |
2363 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
2364 | "Get the property of overlay OVERLAY with property name NAME.") | |
2365 | (overlay, prop) | |
2366 | Lisp_Object overlay, prop; | |
2367 | { | |
cab4777e | 2368 | Lisp_Object plist, fallback; |
52f8ec73 JB |
2369 | |
2370 | CHECK_OVERLAY (overlay, 0); | |
2371 | ||
cab4777e RS |
2372 | fallback = Qnil; |
2373 | ||
48e2e3ba | 2374 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2375 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2376 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2377 | { | |
2378 | if (EQ (XCONS (plist)->car, prop)) | |
2379 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
2380 | else if (EQ (XCONS (plist)->car, Qcategory)) |
2381 | { | |
2382 | Lisp_Object tem; | |
2383 | tem = Fcar (Fcdr (plist)); | |
2384 | if (SYMBOLP (tem)) | |
2385 | fallback = Fget (tem, prop); | |
2386 | } | |
2eec3b4e | 2387 | } |
52f8ec73 | 2388 | |
cab4777e | 2389 | return fallback; |
2eec3b4e RS |
2390 | } |
2391 | ||
2392 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
2393 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
2394 | (overlay, prop, value) | |
2395 | Lisp_Object overlay, prop, value; | |
2396 | { | |
48e2e3ba | 2397 | Lisp_Object tail, buffer; |
9d7608b7 | 2398 | int changed; |
2eec3b4e | 2399 | |
52f8ec73 | 2400 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 2401 | |
274a9425 RS |
2402 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2403 | ||
48e2e3ba | 2404 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2405 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
2406 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
2407 | if (EQ (XCONS (tail)->car, prop)) |
2408 | { | |
9d7608b7 KH |
2409 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
2410 | XCONS (XCONS (tail)->cdr)->car = value; | |
2411 | goto found; | |
274a9425 | 2412 | } |
9d7608b7 KH |
2413 | /* It wasn't in the list, so add it to the front. */ |
2414 | changed = !NILP (value); | |
48e2e3ba KH |
2415 | XOVERLAY (overlay)->plist |
2416 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
2417 | found: |
2418 | if (! NILP (buffer)) | |
2419 | { | |
2420 | if (changed) | |
2421 | redisplay_region (XBUFFER (buffer), | |
2422 | marker_position (OVERLAY_START (overlay)), | |
2423 | marker_position (OVERLAY_END (overlay))); | |
2424 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
2425 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
2426 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
2427 | Fdelete_overlay (overlay); | |
2428 | } | |
2eec3b4e | 2429 | return value; |
1ab256cb RM |
2430 | } |
2431 | \f | |
173f2a64 RS |
2432 | /* Run the modification-hooks of overlays that include |
2433 | any part of the text in START to END. | |
2434 | Run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
2435 | and the insert-after-hooks of overlay ending at START. |
2436 | ||
2437 | This is called both before and after the modification. | |
2438 | AFTER is nonzero when we call after the modification. | |
2439 | ||
2440 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. */ | |
173f2a64 RS |
2441 | |
2442 | void | |
930a9140 | 2443 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 2444 | Lisp_Object start, end; |
930a9140 RS |
2445 | int after; |
2446 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
2447 | { |
2448 | Lisp_Object prop, overlay, tail; | |
2449 | int insertion = EQ (start, end); | |
55b48893 | 2450 | int tail_copied; |
930a9140 | 2451 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
2452 | |
2453 | overlay = Qnil; | |
2454 | tail = Qnil; | |
930a9140 | 2455 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 2456 | |
55b48893 | 2457 | tail_copied = 0; |
173f2a64 RS |
2458 | for (tail = current_buffer->overlays_before; |
2459 | CONSP (tail); | |
2460 | tail = XCONS (tail)->cdr) | |
2461 | { | |
2462 | int startpos, endpos; | |
be8b1c6b | 2463 | Lisp_Object ostart, oend; |
173f2a64 RS |
2464 | |
2465 | overlay = XCONS (tail)->car; | |
2466 | ||
2467 | ostart = OVERLAY_START (overlay); | |
2468 | oend = OVERLAY_END (overlay); | |
2469 | endpos = OVERLAY_POSITION (oend); | |
2470 | if (XFASTINT (start) > endpos) | |
2471 | break; | |
2472 | startpos = OVERLAY_POSITION (ostart); | |
2473 | if (XFASTINT (end) == startpos && insertion) | |
2474 | { | |
2475 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2476 | if (!NILP (prop)) |
2477 | { | |
2478 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
2479 | if (!tail_copied) |
2480 | tail = Fcopy_sequence (tail); | |
2481 | tail_copied = 1; | |
930a9140 | 2482 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2483 | } |
173f2a64 RS |
2484 | } |
2485 | if (XFASTINT (start) == endpos && insertion) | |
2486 | { | |
2487 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2488 | if (!NILP (prop)) |
2489 | { | |
55b48893 RS |
2490 | if (!tail_copied) |
2491 | tail = Fcopy_sequence (tail); | |
2492 | tail_copied = 1; | |
930a9140 | 2493 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2494 | } |
173f2a64 | 2495 | } |
3bd13e92 KH |
2496 | /* Test for intersecting intervals. This does the right thing |
2497 | for both insertion and deletion. */ | |
2498 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2499 | { |
2500 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2501 | if (!NILP (prop)) |
2502 | { | |
55b48893 RS |
2503 | if (!tail_copied) |
2504 | tail = Fcopy_sequence (tail); | |
2505 | tail_copied = 1; | |
930a9140 | 2506 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2507 | } |
173f2a64 RS |
2508 | } |
2509 | } | |
2510 | ||
55b48893 | 2511 | tail_copied = 0; |
173f2a64 RS |
2512 | for (tail = current_buffer->overlays_after; |
2513 | CONSP (tail); | |
2514 | tail = XCONS (tail)->cdr) | |
2515 | { | |
2516 | int startpos, endpos; | |
be8b1c6b | 2517 | Lisp_Object ostart, oend; |
173f2a64 RS |
2518 | |
2519 | overlay = XCONS (tail)->car; | |
2520 | ||
2521 | ostart = OVERLAY_START (overlay); | |
2522 | oend = OVERLAY_END (overlay); | |
2523 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2524 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2525 | if (XFASTINT (end) < startpos) |
2526 | break; | |
2527 | if (XFASTINT (end) == startpos && insertion) | |
2528 | { | |
2529 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2530 | if (!NILP (prop)) |
2531 | { | |
55b48893 RS |
2532 | if (!tail_copied) |
2533 | tail = Fcopy_sequence (tail); | |
2534 | tail_copied = 1; | |
930a9140 | 2535 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2536 | } |
173f2a64 RS |
2537 | } |
2538 | if (XFASTINT (start) == endpos && insertion) | |
2539 | { | |
2540 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2541 | if (!NILP (prop)) |
2542 | { | |
55b48893 RS |
2543 | if (!tail_copied) |
2544 | tail = Fcopy_sequence (tail); | |
2545 | tail_copied = 1; | |
930a9140 | 2546 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2547 | } |
173f2a64 | 2548 | } |
3bd13e92 KH |
2549 | /* Test for intersecting intervals. This does the right thing |
2550 | for both insertion and deletion. */ | |
2551 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2552 | { |
2553 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2554 | if (!NILP (prop)) |
2555 | { | |
55b48893 RS |
2556 | if (!tail_copied) |
2557 | tail = Fcopy_sequence (tail); | |
2558 | tail_copied = 1; | |
930a9140 | 2559 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2560 | } |
173f2a64 RS |
2561 | } |
2562 | } | |
55b48893 RS |
2563 | |
2564 | UNGCPRO; | |
173f2a64 RS |
2565 | } |
2566 | ||
2567 | static void | |
930a9140 RS |
2568 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
2569 | Lisp_Object list, overlay; | |
2570 | int after; | |
2571 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 2572 | { |
930a9140 RS |
2573 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
2574 | GCPRO4 (list, arg1, arg2, arg3); | |
173f2a64 RS |
2575 | while (!NILP (list)) |
2576 | { | |
930a9140 RS |
2577 | if (NILP (arg3)) |
2578 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
2579 | else | |
2580 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
2581 | list = Fcdr (list); |
2582 | } | |
2583 | UNGCPRO; | |
2584 | } | |
9d7608b7 KH |
2585 | |
2586 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
2587 | property is set. */ | |
2588 | void | |
2589 | evaporate_overlays (pos) | |
2590 | int pos; | |
2591 | { | |
2592 | Lisp_Object tail, overlay, hit_list; | |
2593 | ||
2594 | hit_list = Qnil; | |
2595 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
2596 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
2597 | tail = XCONS (tail)->cdr) | |
2598 | { | |
2599 | int endpos; | |
2600 | overlay = XCONS (tail)->car; | |
2601 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2602 | if (endpos < pos) | |
2603 | break; | |
2604 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
2605 | && Foverlay_get (overlay, Qevaporate)) | |
2606 | hit_list = Fcons (overlay, hit_list); | |
2607 | } | |
2608 | else | |
2609 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
2610 | tail = XCONS (tail)->cdr) | |
2611 | { | |
2612 | int startpos; | |
889bf329 | 2613 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
2614 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2615 | if (startpos > pos) | |
2616 | break; | |
2617 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
2618 | && Foverlay_get (overlay, Qevaporate)) | |
2619 | hit_list = Fcons (overlay, hit_list); | |
2620 | } | |
2621 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
2622 | Fdelete_overlay (XCONS (hit_list)->car); | |
2623 | } | |
173f2a64 | 2624 | \f |
54dfdeb0 KH |
2625 | /* Somebody has tried to store a value with an unacceptable type |
2626 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 2627 | void |
54dfdeb0 KH |
2628 | buffer_slot_type_mismatch (offset) |
2629 | int offset; | |
0fa3ba92 | 2630 | { |
54dfdeb0 | 2631 | Lisp_Object sym; |
0fa3ba92 | 2632 | char *type_name; |
54dfdeb0 | 2633 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
2634 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
2635 | { | |
2636 | case Lisp_Int: type_name = "integers"; break; | |
2637 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 2638 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
2639 | default: |
2640 | abort (); | |
2641 | } | |
2642 | ||
2643 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 2644 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
2645 | } |
2646 | \f | |
1ab256cb RM |
2647 | init_buffer_once () |
2648 | { | |
2649 | register Lisp_Object tem; | |
2650 | ||
2651 | /* Make sure all markable slots in buffer_defaults | |
2652 | are initialized reasonably, so mark_buffer won't choke. */ | |
2653 | reset_buffer (&buffer_defaults); | |
bcd40520 | 2654 | reset_buffer_local_variables (&buffer_defaults); |
1ab256cb | 2655 | reset_buffer (&buffer_local_symbols); |
bcd40520 | 2656 | reset_buffer_local_variables (&buffer_local_symbols); |
336cd056 RS |
2657 | /* Prevent GC from getting confused. */ |
2658 | buffer_defaults.text = &buffer_defaults.own_text; | |
2659 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
2660 | #ifdef USE_TEXT_PROPERTIES | |
2661 | BUF_INTERVALS (&buffer_defaults) = 0; | |
2662 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
2663 | #endif | |
67180c6a KH |
2664 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
2665 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
2666 | |
2667 | /* Set up the default values of various buffer slots. */ | |
2668 | /* Must do these before making the first buffer! */ | |
2669 | ||
2670 | /* real setup is done in loaddefs.el */ | |
2671 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2672 | buffer_defaults.abbrev_mode = Qnil; | |
2673 | buffer_defaults.overwrite_mode = Qnil; | |
2674 | buffer_defaults.case_fold_search = Qt; | |
2675 | buffer_defaults.auto_fill_function = Qnil; | |
2676 | buffer_defaults.selective_display = Qnil; | |
2677 | #ifndef old | |
2678 | buffer_defaults.selective_display_ellipses = Qt; | |
2679 | #endif | |
2680 | buffer_defaults.abbrev_table = Qnil; | |
2681 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2682 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2683 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2684 | buffer_defaults.overlays_before = Qnil; |
2685 | buffer_defaults.overlays_after = Qnil; | |
8d7a4592 | 2686 | XSETFASTINT (buffer_defaults.overlay_center, 1); |
1ab256cb | 2687 | |
8d7a4592 | 2688 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
2689 | buffer_defaults.truncate_lines = Qnil; |
2690 | buffer_defaults.ctl_arrow = Qt; | |
2691 | ||
f7975d07 | 2692 | #ifdef DOS_NT |
0776cb1b | 2693 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2694 | #endif |
8d7a4592 KH |
2695 | XSETFASTINT (buffer_defaults.fill_column, 70); |
2696 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 2697 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 2698 | buffer_defaults.file_truename = Qnil; |
1ab256cb RM |
2699 | |
2700 | /* Assign the local-flags to the slots that have default values. | |
2701 | The local flag is a bit that is used in the buffer | |
2702 | to say that it has its own local value for the slot. | |
2703 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2704 | ||
2705 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 2706 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
2707 | |
2708 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2709 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
2710 | XSETINT (buffer_local_flags.filename, -1); |
2711 | XSETINT (buffer_local_flags.directory, -1); | |
2712 | XSETINT (buffer_local_flags.backed_up, -1); | |
2713 | XSETINT (buffer_local_flags.save_length, -1); | |
2714 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
2715 | XSETINT (buffer_local_flags.read_only, -1); | |
2716 | XSETINT (buffer_local_flags.major_mode, -1); | |
2717 | XSETINT (buffer_local_flags.mode_name, -1); | |
2718 | XSETINT (buffer_local_flags.undo_list, -1); | |
2719 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 2720 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 2721 | XSETINT (buffer_local_flags.file_truename, -1); |
8d7a4592 KH |
2722 | |
2723 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
2724 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
2725 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
2726 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
2727 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
2728 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 2729 | #ifndef old |
8d7a4592 | 2730 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 2731 | #endif |
8d7a4592 KH |
2732 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
2733 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
2734 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
2735 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
2736 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
2737 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
2738 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
2739 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); | |
28e969dd | 2740 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); |
f7975d07 | 2741 | #ifdef DOS_NT |
8d7a4592 | 2742 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
54ad07d3 | 2743 | #endif |
1ab256cb RM |
2744 | |
2745 | Vbuffer_alist = Qnil; | |
2746 | current_buffer = 0; | |
2747 | all_buffers = 0; | |
2748 | ||
2749 | QSFundamental = build_string ("Fundamental"); | |
2750 | ||
2751 | Qfundamental_mode = intern ("fundamental-mode"); | |
2752 | buffer_defaults.major_mode = Qfundamental_mode; | |
2753 | ||
2754 | Qmode_class = intern ("mode-class"); | |
2755 | ||
2756 | Qprotected_field = intern ("protected-field"); | |
2757 | ||
2758 | Qpermanent_local = intern ("permanent-local"); | |
2759 | ||
2760 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2761 | ||
2762 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2763 | /* super-magic invisible buffer */ | |
2764 | Vbuffer_alist = Qnil; | |
2765 | ||
ffd56f97 | 2766 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2767 | } |
2768 | ||
2769 | init_buffer () | |
2770 | { | |
2771 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2772 | char *pwd; |
2773 | struct stat dotstat, pwdstat; | |
136351b7 | 2774 | Lisp_Object temp; |
f7975d07 | 2775 | int rc; |
1ab256cb RM |
2776 | |
2777 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2778 | |
2779 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2780 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 2781 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
2782 | && stat (pwd, &pwdstat) == 0 |
2783 | && stat (".", &dotstat) == 0 | |
2784 | && dotstat.st_ino == pwdstat.st_ino | |
2785 | && dotstat.st_dev == pwdstat.st_dev | |
2786 | && strlen (pwd) < MAXPATHLEN) | |
2787 | strcpy (buf, pwd); | |
2788 | else if (getwd (buf) == 0) | |
cf1e6391 | 2789 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
2790 | |
2791 | #ifndef VMS | |
2792 | /* Maybe this should really use some standard subroutine | |
2793 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
2794 | rc = strlen (buf); |
2795 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
2796 | { | |
2797 | buf[rc] = DIRECTORY_SEP; | |
2798 | buf[rc + 1] = '\0'; | |
2799 | } | |
1ab256cb RM |
2800 | #endif /* not VMS */ |
2801 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2802 | |
2803 | temp = get_minibuffer (0); | |
2804 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2805 | } |
2806 | ||
2807 | /* initialize the buffer routines */ | |
2808 | syms_of_buffer () | |
2809 | { | |
188d4d11 RM |
2810 | extern Lisp_Object Qdisabled; |
2811 | ||
1ab256cb RM |
2812 | staticpro (&Vbuffer_defaults); |
2813 | staticpro (&Vbuffer_local_symbols); | |
2814 | staticpro (&Qfundamental_mode); | |
2815 | staticpro (&Qmode_class); | |
2816 | staticpro (&QSFundamental); | |
2817 | staticpro (&Vbuffer_alist); | |
2818 | staticpro (&Qprotected_field); | |
2819 | staticpro (&Qpermanent_local); | |
2820 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2821 | staticpro (&Qoverlayp); |
9d7608b7 KH |
2822 | Qevaporate = intern ("evaporate"); |
2823 | staticpro (&Qevaporate); | |
294d215f RS |
2824 | staticpro (&Qmodification_hooks); |
2825 | Qmodification_hooks = intern ("modification-hooks"); | |
2826 | staticpro (&Qinsert_in_front_hooks); | |
2827 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2828 | staticpro (&Qinsert_behind_hooks); | |
2829 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2830 | staticpro (&Qget_file_buffer); |
2831 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2832 | Qpriority = intern ("priority"); |
2833 | staticpro (&Qpriority); | |
2834 | Qwindow = intern ("window"); | |
2835 | staticpro (&Qwindow); | |
52f8ec73 JB |
2836 | |
2837 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2838 | |
2839 | Fput (Qprotected_field, Qerror_conditions, | |
2840 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2841 | Fput (Qprotected_field, Qerror_message, | |
2842 | build_string ("Attempt to modify a protected field")); | |
2843 | ||
2844 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2845 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2846 | ||
2847 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2848 | &buffer_defaults.mode_line_format, | |
2849 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2850 | This is the same as (default-value 'mode-line-format)."); | |
2851 | ||
2852 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2853 | &buffer_defaults.abbrev_mode, | |
2854 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2855 | This is the same as (default-value 'abbrev-mode)."); | |
2856 | ||
2857 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2858 | &buffer_defaults.ctl_arrow, | |
2859 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2860 | This is the same as (default-value 'ctl-arrow)."); | |
2861 | ||
2862 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2863 | &buffer_defaults.truncate_lines, | |
2864 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2865 | This is the same as (default-value 'truncate-lines)."); | |
2866 | ||
2867 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2868 | &buffer_defaults.fill_column, | |
2869 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2870 | This is the same as (default-value 'fill-column)."); | |
2871 | ||
2872 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2873 | &buffer_defaults.left_margin, | |
2874 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2875 | This is the same as (default-value 'left-margin)."); | |
2876 | ||
2877 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2878 | &buffer_defaults.tab_width, | |
2879 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2880 | This is the same as (default-value 'tab-width)."); | |
2881 | ||
2882 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2883 | &buffer_defaults.case_fold_search, | |
2884 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2885 | This is the same as (default-value 'case-fold-search)."); | |
2886 | ||
f7975d07 | 2887 | #ifdef DOS_NT |
54ad07d3 RS |
2888 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
2889 | &buffer_defaults.buffer_file_type, | |
2890 | "Default file type for buffers that do not override it.\n\ | |
2891 | This is the same as (default-value 'buffer-file-type).\n\ | |
2892 | The file type is nil for text, t for binary."); | |
2893 | #endif | |
2894 | ||
0fa3ba92 JB |
2895 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2896 | Qnil, 0); | |
1ab256cb RM |
2897 | |
2898 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2899 | But make-docfile finds it! | |
2900 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2901 | Qnil, |
1ab256cb RM |
2902 | "Template for displaying mode line for current buffer.\n\ |
2903 | Each buffer has its own value of this variable.\n\ | |
2904 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2905 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2906 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2907 | in that the %-constructs below are not recognized.\n\ | |
2908 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2909 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2910 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2911 | For a list whose car is a string or list, each element is processed\n\ | |
2912 | recursively and the results are effectively concatenated.\n\ | |
2913 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2914 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2915 | to the width specified by that number.\n\ | |
2916 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2917 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2918 | or when it is found in a cons-cell or a list)\n\ | |
2919 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
2920 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
2921 | % means buffer is read-only and * means it is modified.\n\ | |
2922 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 2923 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 2924 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 2925 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 2926 | or print Bottom or All.\n\ |
1ab256cb | 2927 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 2928 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
2929 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
2930 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2931 | Decimal digits after the % specify field width to which to pad."); | |
2932 | */ | |
2933 | ||
2934 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2935 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2936 | nil here means use current buffer's major mode."); | |
2937 | ||
2938 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2939 | make_number (Lisp_Symbol), |
1ab256cb RM |
2940 | "Symbol for current buffer's major mode."); |
2941 | ||
2942 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2943 | make_number (Lisp_String), |
1ab256cb RM |
2944 | "Pretty name of current buffer's major mode (a string)."); |
2945 | ||
0fa3ba92 | 2946 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2947 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2948 | Automatically becomes buffer-local when set in any fashion."); | |
2949 | ||
2950 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2951 | Qnil, |
1ab256cb RM |
2952 | "*Non-nil if searches should ignore case.\n\ |
2953 | Automatically becomes buffer-local when set in any fashion."); | |
2954 | ||
2955 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2956 | make_number (Lisp_Int), |
1ab256cb RM |
2957 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2958 | Automatically becomes buffer-local when set in any fashion."); | |
2959 | ||
2960 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2961 | make_number (Lisp_Int), |
1ab256cb RM |
2962 | "*Column for the default indent-line-function to indent to.\n\ |
2963 | Linefeed indents to this column in Fundamental mode.\n\ | |
2964 | Automatically becomes buffer-local when set in any fashion."); | |
2965 | ||
2966 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2967 | make_number (Lisp_Int), |
1ab256cb RM |
2968 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2969 | Automatically becomes buffer-local when set in any fashion."); | |
2970 | ||
0fa3ba92 | 2971 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2972 | "*Non-nil means display control chars with uparrow.\n\ |
2973 | Nil means use backslash and octal digits.\n\ | |
2974 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2975 | This variable does not apply to characters whose display is specified\n\ | |
2976 | in the current display table (if there is one)."); | |
2977 | ||
0fa3ba92 | 2978 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2979 | "*Non-nil means do not display continuation lines;\n\ |
2980 | give each line of text one screen line.\n\ | |
2981 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2982 | \n\ | |
2983 | Note that this is overridden by the variable\n\ | |
2984 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2985 | and this buffer is not full-frame width."); |
1ab256cb | 2986 | |
f7975d07 | 2987 | #ifdef DOS_NT |
54ad07d3 RS |
2988 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
2989 | Qnil, | |
006d3d34 RS |
2990 | "Non-nil if the visited file is a binary file.\n\ |
2991 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
2992 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 2993 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
2994 | #endif |
2995 | ||
1ab256cb | 2996 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 2997 | make_number (Lisp_String), |
1ab256cb RM |
2998 | "Name of default directory of current buffer. Should end with slash.\n\ |
2999 | Each buffer has its own value of this variable."); | |
3000 | ||
3001 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3002 | Qnil, |
1ab256cb RM |
3003 | "Function called (if non-nil) to perform auto-fill.\n\ |
3004 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
3005 | Each buffer has its own value of this variable.\n\ | |
3006 | NOTE: This variable is not an ordinary hook;\n\ | |
3007 | It may not be a list of functions."); | |
3008 | ||
3009 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3010 | make_number (Lisp_String), |
1ab256cb RM |
3011 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3012 | Each buffer has its own value of this variable."); | |
3013 | ||
f6ed2e84 RS |
3014 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
3015 | make_number (Lisp_String), | |
3016 | "Truename of file visited in current buffer, or nil if not visiting a file.\n\ | |
3017 | The truename of a file is calculated by `file-truename'.\n\ | |
3018 | Each buffer has its own value of this variable."); | |
3019 | ||
1ab256cb | 3020 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 3021 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3022 | make_number (Lisp_String), |
1ab256cb RM |
3023 | "Name of file for auto-saving current buffer,\n\ |
3024 | or nil if buffer should not be auto-saved.\n\ | |
3025 | Each buffer has its own value of this variable."); | |
3026 | ||
0fa3ba92 | 3027 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3028 | "Non-nil if this buffer is read-only.\n\ |
3029 | Each buffer has its own value of this variable."); | |
3030 | ||
0fa3ba92 | 3031 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
3032 | "Non-nil if this buffer's file has been backed up.\n\ |
3033 | Backing up is done before the first time the file is saved.\n\ | |
3034 | Each buffer has its own value of this variable."); | |
3035 | ||
3036 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 3037 | make_number (Lisp_Int), |
1ab256cb RM |
3038 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
3039 | 0 initially.\n\ | |
3040 | Each buffer has its own value of this variable."); | |
3041 | ||
3042 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 3043 | Qnil, |
1ab256cb RM |
3044 | "Non-nil enables selective display:\n\ |
3045 | Integer N as value means display only lines\n\ | |
3046 | that start with less than n columns of space.\n\ | |
3047 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
3048 | Then ^M's in the file are written into files as newlines.\n\n\ | |
3049 | Automatically becomes buffer-local when set in any fashion."); | |
3050 | ||
3051 | #ifndef old | |
3052 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
3053 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 3054 | Qnil, |
1ab256cb RM |
3055 | "t means display ... on previous line when a line is invisible.\n\ |
3056 | Automatically becomes buffer-local when set in any fashion."); | |
3057 | #endif | |
3058 | ||
0fa3ba92 | 3059 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 3060 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
3061 | The value should be one of `overwrite-mode-textual',\n\ |
3062 | `overwrite-mode-binary', or nil.\n\ | |
3063 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 3064 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 3065 | until the tab is filled in.\n\ |
6bbb0d4a | 3066 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
3067 | Automatically becomes buffer-local when set in any fashion."); |
3068 | ||
54939090 RS |
3069 | #if 0 /* The doc string is too long for some compilers, |
3070 | but make-docfile can find it in this comment. */ | |
1ab256cb | 3071 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 3072 | Qnil, |
1ab256cb RM |
3073 | "Display table that controls display of the contents of current buffer.\n\ |
3074 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3075 | The display table is a vector created with `make-display-table'.\n\ | |
3076 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 3077 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 3078 | nil means display the character in the default fashion.\n\ |
a45e35e1 | 3079 | The remaining six elements control the display of\n\ |
6158b3b0 JB |
3080 | the end of a truncated screen line (element 256, a single character);\n\ |
3081 | the end of a continued line (element 257, a single character);\n\ | |
3082 | the escape character used to display character codes in octal\n\ | |
3083 | (element 258, a single character);\n\ | |
3084 | the character used as an arrow for control characters (element 259,\n\ | |
3085 | a single character);\n\ | |
3086 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
a45e35e1 JB |
3087 | a vector of characters);\n\ |
3088 | the character used to draw the border between side-by-side windows\n\ | |
3402827c | 3089 | (element 261, a single character).\n\ |
1ab256cb RM |
3090 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
3091 | Each window can have its own, overriding display table."); | |
54939090 RS |
3092 | #endif |
3093 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 3094 | Qnil, 0); |
1ab256cb | 3095 | |
1ab256cb RM |
3096 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
3097 | "Don't ask."); | |
3098 | */ | |
01050cb5 | 3099 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
3100 | "Function to call before each text change.\n\ |
3101 | Two arguments are passed to the function: the positions of\n\ | |
3102 | the beginning and end of the range of old text to be changed.\n\ | |
3103 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3104 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 3105 | \n\ |
5f079267 | 3106 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
3107 | don't call any before-change or after-change functions.\n\ |
3108 | That's because these variables are temporarily set to nil.\n\ | |
3109 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3110 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3111 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3112 | Vbefore_change_function = Qnil; |
3113 | ||
3114 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
3115 | "Function to call after each text change.\n\ | |
3116 | Three arguments are passed to the function: the positions of\n\ | |
3117 | the beginning and end of the range of changed text,\n\ | |
3118 | and the length of the pre-change text replaced by that range.\n\ | |
3119 | \(For an insertion, the pre-change length is zero;\n\ | |
3120 | for a deletion, that length is the number of characters deleted,\n\ | |
3121 | and the post-change beginning and end are at the same place.)\n\ | |
3122 | \n\ | |
5f079267 | 3123 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
3124 | don't call any before-change or after-change functions.\n\ |
3125 | That's because these variables are temporarily set to nil.\n\ | |
3126 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3127 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3128 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3129 | Vafter_change_function = Qnil; |
3130 | ||
5f079267 RS |
3131 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
3132 | "List of functions to call before each text change.\n\ | |
3133 | Two arguments are passed to each function: the positions of\n\ | |
3134 | the beginning and end of the range of old text to be changed.\n\ | |
3135 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3136 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
3137 | \n\ |
3138 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
3139 | don't call any before-change or after-change functions.\n\ |
3140 | That's because these variables are temporarily set to nil.\n\ | |
3141 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3142 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3143 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
3144 | Vbefore_change_functions = Qnil; |
3145 | ||
3146 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
3147 | "List of function to call after each text change.\n\ | |
3148 | Three arguments are passed to each function: the positions of\n\ | |
3149 | the beginning and end of the range of changed text,\n\ | |
3150 | and the length of the pre-change text replaced by that range.\n\ | |
3151 | \(For an insertion, the pre-change length is zero;\n\ | |
3152 | for a deletion, that length is the number of characters deleted,\n\ | |
3153 | and the post-change beginning and end are at the same place.)\n\ | |
3154 | \n\ | |
3155 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
3156 | don't call any before-change or after-change functions.\n\ |
3157 | That's because these variables are temporarily set to nil.\n\ | |
3158 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3159 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3160 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 3161 | |
5f079267 RS |
3162 | Vafter_change_functions = Qnil; |
3163 | ||
dbc4e1c1 JB |
3164 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
3165 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
3166 | The functions are run using the `run-hooks' function."); | |
3167 | Vfirst_change_hook = Qnil; | |
3168 | Qfirst_change_hook = intern ("first-change-hook"); | |
3169 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 3170 | |
54939090 RS |
3171 | #if 0 /* The doc string is too long for some compilers, |
3172 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 3173 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
3174 | "List of undo entries in current buffer.\n\ |
3175 | Recent changes come first; older changes follow newer.\n\ | |
3176 | \n\ | |
3177 | An entry (START . END) represents an insertion which begins at\n\ | |
3178 | position START and ends at position END.\n\ | |
3179 | \n\ | |
3180 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
3181 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
3182 | of the text being deleted; if negative, point was at the end.\n\ | |
3183 | \n\ | |
6c0df54a RS |
3184 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
3185 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
3186 | of the visited file's modification time, as of that time. If the\n\ | |
3187 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
3188 | obsolete.\n\ |
3189 | \n\ | |
6c0df54a RS |
3190 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
3191 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
3192 | and VALUE is the old value.\n\ | |
483c1fd3 | 3193 | \n\ |
bec44fd6 JB |
3194 | An entry of the form POSITION indicates that point was at the buffer\n\ |
3195 | location given by the integer. Undoing an entry of this form places\n\ | |
3196 | point at POSITION.\n\ | |
3197 | \n\ | |
1ab256cb RM |
3198 | nil marks undo boundaries. The undo command treats the changes\n\ |
3199 | between two undo boundaries as a single step to be undone.\n\ | |
3200 | \n\ | |
bec44fd6 | 3201 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
3202 | #endif |
3203 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 3204 | 0); |
1ab256cb | 3205 | |
c48f61ef RS |
3206 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
3207 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
3208 | Automatically local in all buffers."); | |
3209 | ||
28e969dd | 3210 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
3211 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
3212 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 3213 | \n\ |
f0c5b712 JB |
3214 | Normally, the line-motion functions work by scanning the buffer for\n\ |
3215 | newlines. Columnar operations (like move-to-column and\n\ | |
3216 | compute-motion) also work by scanning the buffer, summing character\n\ | |
3217 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 3218 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
3219 | motion functions will take longer to execute. Emacs may also take\n\ |
3220 | longer to update the display.\n\ | |
28e969dd | 3221 | \n\ |
f0c5b712 JB |
3222 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
3223 | results of their scans, and consult the cache to avoid rescanning\n\ | |
3224 | regions of the buffer until the text is modified. The caches are most\n\ | |
3225 | beneficial when they prevent the most searching---that is, when the\n\ | |
3226 | buffer contains long lines and large regions of characters with the\n\ | |
3227 | same, fixed screen width.\n\ | |
28e969dd | 3228 | \n\ |
f0c5b712 JB |
3229 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
3230 | become slightly slower (because of the overhead of consulting the\n\ | |
3231 | cache), and the caches will use memory roughly proportional to the\n\ | |
3232 | number of newlines and characters whose screen width varies.\n\ | |
3233 | \n\ | |
3234 | The caches require no explicit maintenance; their accuracy is\n\ | |
3235 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
3236 | the cache should not affect the behavior of any of the motion\n\ | |
3237 | functions; it should only affect their performance."); | |
28e969dd | 3238 | |
943e065b RS |
3239 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3240 | "Value of point before the last series of scroll operations, or nil."); | |
3241 | ||
c48f61ef RS |
3242 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
3243 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
3244 | Vtransient_mark_mode = Qnil; | |
3245 | ||
0a4469c9 | 3246 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
3247 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
3248 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
3249 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
3250 | and disregard a `read-only' text property if the property value\n\ | |
3251 | is a member of the list."); | |
3252 | Vinhibit_read_only = Qnil; | |
3253 | ||
dcdffbf6 RS |
3254 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
3255 | "List of functions called with no args to query before killing a buffer."); | |
3256 | Vkill_buffer_query_functions = Qnil; | |
3257 | ||
1ab256cb RM |
3258 | defsubr (&Sbuffer_list); |
3259 | defsubr (&Sget_buffer); | |
3260 | defsubr (&Sget_file_buffer); | |
3261 | defsubr (&Sget_buffer_create); | |
336cd056 | 3262 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 3263 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
3264 | defsubr (&Sbuffer_name); |
3265 | /*defsubr (&Sbuffer_number);*/ | |
3266 | defsubr (&Sbuffer_file_name); | |
336cd056 | 3267 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
3268 | defsubr (&Sbuffer_local_variables); |
3269 | defsubr (&Sbuffer_modified_p); | |
3270 | defsubr (&Sset_buffer_modified_p); | |
3271 | defsubr (&Sbuffer_modified_tick); | |
3272 | defsubr (&Srename_buffer); | |
3273 | defsubr (&Sother_buffer); | |
3274 | defsubr (&Sbuffer_disable_undo); | |
3275 | defsubr (&Sbuffer_enable_undo); | |
3276 | defsubr (&Skill_buffer); | |
3277 | defsubr (&Serase_buffer); | |
a9ee7a59 | 3278 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
3279 | defsubr (&Sswitch_to_buffer); |
3280 | defsubr (&Spop_to_buffer); | |
3281 | defsubr (&Scurrent_buffer); | |
3282 | defsubr (&Sset_buffer); | |
3283 | defsubr (&Sbarf_if_buffer_read_only); | |
3284 | defsubr (&Sbury_buffer); | |
1ab256cb | 3285 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 3286 | |
52f8ec73 | 3287 | defsubr (&Soverlayp); |
2eec3b4e RS |
3288 | defsubr (&Smake_overlay); |
3289 | defsubr (&Sdelete_overlay); | |
3290 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
3291 | defsubr (&Soverlay_start); |
3292 | defsubr (&Soverlay_end); | |
3293 | defsubr (&Soverlay_buffer); | |
3294 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
3295 | defsubr (&Soverlays_at); |
3296 | defsubr (&Snext_overlay_change); | |
239c932b | 3297 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
3298 | defsubr (&Soverlay_recenter); |
3299 | defsubr (&Soverlay_lists); | |
3300 | defsubr (&Soverlay_get); | |
3301 | defsubr (&Soverlay_put); | |
1ab256cb RM |
3302 | } |
3303 | ||
3304 | keys_of_buffer () | |
3305 | { | |
3306 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
3307 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
3308 | |
3309 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
3310 | initialized when that function gets called. */ | |
3311 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 3312 | } |