Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
3cb719bd | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995 |
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; |
3cb719bd RS |
454 | b->invisibility_spec = Qt; |
455 | ||
1ab256cb RM |
456 | #if 0 |
457 | b->sort_table = XSTRING (Vascii_sort_table); | |
458 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
459 | #endif /* 0 */ | |
460 | ||
461 | /* Reset all per-buffer variables to their defaults. */ | |
462 | b->local_var_alist = Qnil; | |
463 | b->local_var_flags = 0; | |
464 | ||
465 | /* For each slot that has a default value, | |
466 | copy that into the slot. */ | |
467 | ||
468 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
469 | offset < sizeof (struct buffer); | |
4d2f1389 | 470 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
471 | { |
472 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
473 | if (flag > 0 || flag == -2) | |
474 | *(Lisp_Object *)(offset + (char *)b) = | |
475 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
476 | } | |
1ab256cb RM |
477 | } |
478 | ||
01050cb5 RM |
479 | /* We split this away from generate-new-buffer, because rename-buffer |
480 | and set-visited-file-name ought to be able to use this to really | |
481 | rename the buffer properly. */ | |
482 | ||
483 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 484 | 1, 2, 0, |
01050cb5 RM |
485 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
486 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 487 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 488 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 489 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 490 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 491 | even if a buffer with that name exists.") |
c273e647 RS |
492 | (name, ignore) |
493 | register Lisp_Object name, ignore; | |
1ab256cb RM |
494 | { |
495 | register Lisp_Object gentemp, tem; | |
496 | int count; | |
497 | char number[10]; | |
498 | ||
499 | CHECK_STRING (name, 0); | |
500 | ||
501 | tem = Fget_buffer (name); | |
265a9e55 | 502 | if (NILP (tem)) |
01050cb5 | 503 | return name; |
1ab256cb RM |
504 | |
505 | count = 1; | |
506 | while (1) | |
507 | { | |
508 | sprintf (number, "<%d>", ++count); | |
509 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 510 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
511 | if (!NILP (tem)) |
512 | return gentemp; | |
1ab256cb | 513 | tem = Fget_buffer (gentemp); |
265a9e55 | 514 | if (NILP (tem)) |
01050cb5 | 515 | return gentemp; |
1ab256cb RM |
516 | } |
517 | } | |
518 | ||
519 | \f | |
520 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
521 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 522 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
523 | (buffer) |
524 | register Lisp_Object buffer; | |
525 | { | |
265a9e55 | 526 | if (NILP (buffer)) |
1ab256cb RM |
527 | return current_buffer->name; |
528 | CHECK_BUFFER (buffer, 0); | |
529 | return XBUFFER (buffer)->name; | |
530 | } | |
531 | ||
532 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
533 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
534 | No argument or nil as argument means use the current buffer.") | |
535 | (buffer) | |
536 | register Lisp_Object buffer; | |
537 | { | |
265a9e55 | 538 | if (NILP (buffer)) |
1ab256cb RM |
539 | return current_buffer->filename; |
540 | CHECK_BUFFER (buffer, 0); | |
541 | return XBUFFER (buffer)->filename; | |
542 | } | |
543 | ||
336cd056 RS |
544 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
545 | 0, 1, 0, | |
546 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
547 | If BUFFER is not indirect, return nil.") | |
548 | (buffer) | |
549 | register Lisp_Object buffer; | |
550 | { | |
551 | struct buffer *base; | |
552 | Lisp_Object base_buffer; | |
553 | ||
554 | if (NILP (buffer)) | |
555 | base = current_buffer->base_buffer; | |
556 | else | |
557 | { | |
558 | CHECK_BUFFER (buffer, 0); | |
559 | base = XBUFFER (buffer)->base_buffer; | |
560 | } | |
561 | ||
562 | if (! base) | |
563 | return Qnil; | |
564 | XSETBUFFER (base_buffer, base); | |
565 | return base_buffer; | |
566 | } | |
567 | ||
1ab256cb RM |
568 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
569 | Sbuffer_local_variables, 0, 1, 0, | |
570 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
571 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
572 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
573 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
574 | No argument or nil as argument means use current buffer as BUFFER.") | |
575 | (buffer) | |
576 | register Lisp_Object buffer; | |
577 | { | |
578 | register struct buffer *buf; | |
553defa4 | 579 | register Lisp_Object result; |
1ab256cb | 580 | |
265a9e55 | 581 | if (NILP (buffer)) |
1ab256cb RM |
582 | buf = current_buffer; |
583 | else | |
584 | { | |
585 | CHECK_BUFFER (buffer, 0); | |
586 | buf = XBUFFER (buffer); | |
587 | } | |
588 | ||
553defa4 RS |
589 | result = Qnil; |
590 | ||
1ab256cb | 591 | { |
553defa4 RS |
592 | register Lisp_Object tail; |
593 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 594 | { |
553defa4 RS |
595 | Lisp_Object val, elt; |
596 | ||
597 | elt = XCONS (tail)->car; | |
598 | ||
e0585c64 RS |
599 | /* Reference each variable in the alist in buf. |
600 | If inquiring about the current buffer, this gets the current values, | |
601 | so store them into the alist so the alist is up to date. | |
602 | If inquiring about some other buffer, this swaps out any values | |
603 | for that buffer, making the alist up to date automatically. */ | |
604 | val = find_symbol_value (XCONS (elt)->car); | |
605 | /* Use the current buffer value only if buf is the current buffer. */ | |
606 | if (buf != current_buffer) | |
553defa4 RS |
607 | val = XCONS (elt)->cdr; |
608 | ||
609 | /* If symbol is unbound, put just the symbol in the list. */ | |
610 | if (EQ (val, Qunbound)) | |
611 | result = Fcons (XCONS (elt)->car, result); | |
612 | /* Otherwise, put (symbol . value) in the list. */ | |
613 | else | |
614 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
615 | } |
616 | } | |
617 | ||
1ab256cb RM |
618 | /* Add on all the variables stored in special slots. */ |
619 | { | |
620 | register int offset, mask; | |
621 | ||
622 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
623 | offset < sizeof (struct buffer); | |
4d2f1389 | 624 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 625 | { |
aab80822 | 626 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 627 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
628 | if (SYMBOLP (*(Lisp_Object *)(offset |
629 | + (char *)&buffer_local_symbols))) | |
630 | result = Fcons (Fcons (*((Lisp_Object *) | |
631 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
632 | *(Lisp_Object *)(offset + (char *)buf)), |
633 | result); | |
1ab256cb RM |
634 | } |
635 | } | |
553defa4 RS |
636 | |
637 | return result; | |
1ab256cb RM |
638 | } |
639 | ||
640 | \f | |
641 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
642 | 0, 1, 0, | |
643 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
644 | No argument or nil as argument means use current buffer as BUFFER.") | |
645 | (buffer) | |
646 | register Lisp_Object buffer; | |
647 | { | |
648 | register struct buffer *buf; | |
265a9e55 | 649 | if (NILP (buffer)) |
1ab256cb RM |
650 | buf = current_buffer; |
651 | else | |
652 | { | |
653 | CHECK_BUFFER (buffer, 0); | |
654 | buf = XBUFFER (buffer); | |
655 | } | |
656 | ||
336cd056 | 657 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
658 | } |
659 | ||
660 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
661 | 1, 1, 0, | |
662 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
663 | A non-nil FLAG means mark the buffer modified.") | |
664 | (flag) | |
665 | register Lisp_Object flag; | |
666 | { | |
667 | register int already; | |
668 | register Lisp_Object fn; | |
669 | ||
670 | #ifdef CLASH_DETECTION | |
671 | /* If buffer becoming modified, lock the file. | |
672 | If buffer becoming unmodified, unlock the file. */ | |
673 | ||
674 | fn = current_buffer->filename; | |
265a9e55 | 675 | if (!NILP (fn)) |
1ab256cb | 676 | { |
336cd056 | 677 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 678 | if (!already && !NILP (flag)) |
1ab256cb | 679 | lock_file (fn); |
265a9e55 | 680 | else if (already && NILP (flag)) |
1ab256cb RM |
681 | unlock_file (fn); |
682 | } | |
683 | #endif /* CLASH_DETECTION */ | |
684 | ||
336cd056 | 685 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
686 | update_mode_lines++; |
687 | return flag; | |
688 | } | |
689 | ||
690 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
691 | 0, 1, 0, | |
692 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
693 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
694 | that buffer is changed. It wraps around occasionally.\n\ | |
695 | No argument or nil as argument means use current buffer as BUFFER.") | |
696 | (buffer) | |
697 | register Lisp_Object buffer; | |
698 | { | |
699 | register struct buffer *buf; | |
265a9e55 | 700 | if (NILP (buffer)) |
1ab256cb RM |
701 | buf = current_buffer; |
702 | else | |
703 | { | |
704 | CHECK_BUFFER (buffer, 0); | |
705 | buf = XBUFFER (buffer); | |
706 | } | |
707 | ||
708 | return make_number (BUF_MODIFF (buf)); | |
709 | } | |
710 | \f | |
01050cb5 | 711 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 712 | "sRename buffer (to new name): \nP", |
1ab256cb | 713 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 714 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 715 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 716 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 717 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
718 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
719 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 720 | This does not change the name of the visited file (if any).") |
489c043a RS |
721 | (newname, unique) |
722 | register Lisp_Object newname, unique; | |
1ab256cb RM |
723 | { |
724 | register Lisp_Object tem, buf; | |
725 | ||
489c043a | 726 | CHECK_STRING (newname, 0); |
d59698c4 | 727 | |
489c043a | 728 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
729 | error ("Empty string is invalid as a buffer name"); |
730 | ||
489c043a | 731 | tem = Fget_buffer (newname); |
c059b5ea RM |
732 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
733 | the buffer automatically so you can create another with the original name. | |
734 | It makes UNIQUE equivalent to | |
489c043a | 735 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 736 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 737 | return current_buffer->name; |
265a9e55 | 738 | if (!NILP (tem)) |
01050cb5 | 739 | { |
3bd779aa | 740 | if (!NILP (unique)) |
489c043a | 741 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 742 | else |
489c043a | 743 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 744 | } |
1ab256cb | 745 | |
489c043a | 746 | current_buffer->name = newname; |
76f590d7 JB |
747 | |
748 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
749 | any windows displaying current_buffer will stay unchanged. */ | |
750 | update_mode_lines++; | |
751 | ||
67180c6a | 752 | XSETBUFFER (buf, current_buffer); |
489c043a | 753 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
754 | if (NILP (current_buffer->filename) |
755 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 756 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
757 | /* Refetch since that last call may have done GC. */ |
758 | return current_buffer->name; | |
1ab256cb RM |
759 | } |
760 | ||
a0ebb746 | 761 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 762 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
763 | Buffers not visible in windows are preferred to visible buffers,\n\ |
764 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
765 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
766 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
767 | (buffer, visible_ok) |
768 | register Lisp_Object buffer, visible_ok; | |
1ab256cb RM |
769 | { |
770 | register Lisp_Object tail, buf, notsogood, tem; | |
771 | notsogood = Qnil; | |
772 | ||
265a9e55 | 773 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
774 | { |
775 | buf = Fcdr (Fcar (tail)); | |
776 | if (EQ (buf, buffer)) | |
777 | continue; | |
778 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
779 | continue; | |
04ae1b48 RS |
780 | #ifdef MULTI_FRAME |
781 | /* If the selected frame has a buffer_predicate, | |
782 | disregard buffers that don't fit the predicate. */ | |
783 | tem = frame_buffer_predicate (); | |
784 | if (!NILP (tem)) | |
785 | { | |
786 | tem = call1 (tem, buf); | |
787 | if (NILP (tem)) | |
788 | continue; | |
789 | } | |
790 | #endif | |
791 | ||
a0ebb746 | 792 | if (NILP (visible_ok)) |
db732e5a | 793 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
794 | else |
795 | tem = Qnil; | |
265a9e55 | 796 | if (NILP (tem)) |
1ab256cb | 797 | return buf; |
265a9e55 | 798 | if (NILP (notsogood)) |
1ab256cb RM |
799 | notsogood = buf; |
800 | } | |
265a9e55 | 801 | if (!NILP (notsogood)) |
1ab256cb RM |
802 | return notsogood; |
803 | return Fget_buffer_create (build_string ("*scratch*")); | |
804 | } | |
805 | \f | |
5b8bcf48 | 806 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1, |
1ab256cb | 807 | 0, |
5b8bcf48 RS |
808 | "Make BUFFER stop keeping undo information.\n\ |
809 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
810 | (buffer) |
811 | register Lisp_Object buffer; | |
1ab256cb | 812 | { |
ffd56f97 JB |
813 | Lisp_Object real_buffer; |
814 | ||
815 | if (NILP (buffer)) | |
67180c6a | 816 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
817 | else |
818 | { | |
819 | real_buffer = Fget_buffer (buffer); | |
820 | if (NILP (real_buffer)) | |
821 | nsberror (buffer); | |
822 | } | |
823 | ||
824 | XBUFFER (real_buffer)->undo_list = Qt; | |
825 | ||
1ab256cb RM |
826 | return Qnil; |
827 | } | |
828 | ||
829 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
830 | 0, 1, "", | |
831 | "Start keeping undo information for buffer BUFFER.\n\ | |
832 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
833 | (buffer) |
834 | register Lisp_Object buffer; | |
1ab256cb | 835 | { |
ffd56f97 | 836 | Lisp_Object real_buffer; |
1ab256cb | 837 | |
ffd56f97 | 838 | if (NILP (buffer)) |
67180c6a | 839 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
840 | else |
841 | { | |
ffd56f97 JB |
842 | real_buffer = Fget_buffer (buffer); |
843 | if (NILP (real_buffer)) | |
844 | nsberror (buffer); | |
1ab256cb RM |
845 | } |
846 | ||
ffd56f97 JB |
847 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
848 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
849 | |
850 | return Qnil; | |
851 | } | |
852 | ||
853 | /* | |
854 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
855 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
856 | The buffer being killed will be current while the hook is running.\n\ | |
857 | See `kill-buffer'." | |
858 | */ | |
859 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
860 | "Kill the buffer BUFFER.\n\ | |
861 | The argument may be a buffer or may be the name of a buffer.\n\ | |
862 | An argument of nil means kill the current buffer.\n\n\ | |
863 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
864 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
865 | if not void, is a list of functions to be called, with no arguments,\n\ | |
866 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
867 | when the hook functions are called.\n\n\ | |
868 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
869 | with `delete-process'.") | |
870 | (bufname) | |
871 | Lisp_Object bufname; | |
872 | { | |
873 | Lisp_Object buf; | |
874 | register struct buffer *b; | |
875 | register Lisp_Object tem; | |
876 | register struct Lisp_Marker *m; | |
877 | struct gcpro gcpro1, gcpro2; | |
878 | ||
265a9e55 | 879 | if (NILP (bufname)) |
1ab256cb RM |
880 | buf = Fcurrent_buffer (); |
881 | else | |
882 | buf = Fget_buffer (bufname); | |
265a9e55 | 883 | if (NILP (buf)) |
1ab256cb RM |
884 | nsberror (bufname); |
885 | ||
886 | b = XBUFFER (buf); | |
887 | ||
888 | /* Query if the buffer is still modified. */ | |
265a9e55 | 889 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 890 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb RM |
891 | { |
892 | GCPRO2 (buf, bufname); | |
893 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", | |
894 | XSTRING (b->name)->data)); | |
895 | UNGCPRO; | |
265a9e55 | 896 | if (NILP (tem)) |
1ab256cb RM |
897 | return Qnil; |
898 | } | |
899 | ||
dcdffbf6 | 900 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
901 | { |
902 | register Lisp_Object val; | |
903 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 904 | Lisp_Object list; |
1ab256cb RM |
905 | |
906 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
907 | set_buffer_internal (b); | |
dcdffbf6 RS |
908 | |
909 | /* First run the query functions; if any query is answered no, | |
910 | don't kill the buffer. */ | |
911 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
912 | { | |
913 | tem = call0 (Fcar (list)); | |
914 | if (NILP (tem)) | |
915 | return unbind_to (count, Qnil); | |
916 | } | |
917 | ||
918 | /* Then run the hooks. */ | |
fd186f07 RS |
919 | if (!NILP (Vrun_hooks)) |
920 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
921 | unbind_to (count, Qnil); |
922 | } | |
923 | ||
924 | /* We have no more questions to ask. Verify that it is valid | |
925 | to kill the buffer. This must be done after the questions | |
926 | since anything can happen within do_yes_or_no_p. */ | |
927 | ||
928 | /* Don't kill the minibuffer now current. */ | |
929 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
930 | return Qnil; | |
931 | ||
265a9e55 | 932 | if (NILP (b->name)) |
1ab256cb RM |
933 | return Qnil; |
934 | ||
336cd056 RS |
935 | /* When we kill a base buffer, kill all its indirect buffers. |
936 | We do it at this stage so nothing terrible happens if they | |
937 | ask questions or their hooks get errors. */ | |
938 | if (! b->base_buffer) | |
939 | { | |
940 | struct buffer *other; | |
941 | ||
942 | GCPRO1 (buf); | |
943 | ||
944 | for (other = all_buffers; other; other = other->next) | |
945 | if (other->base_buffer == b) | |
946 | { | |
947 | Lisp_Object buf; | |
948 | XSETBUFFER (buf, other); | |
949 | Fkill_buffer (buf); | |
950 | } | |
951 | ||
952 | UNGCPRO; | |
953 | } | |
954 | ||
1ab256cb RM |
955 | /* Make this buffer not be current. |
956 | In the process, notice if this is the sole visible buffer | |
957 | and give up if so. */ | |
958 | if (b == current_buffer) | |
959 | { | |
172a9c1f | 960 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
961 | Fset_buffer (tem); |
962 | if (b == current_buffer) | |
963 | return Qnil; | |
964 | } | |
965 | ||
966 | /* Now there is no question: we can kill the buffer. */ | |
967 | ||
968 | #ifdef CLASH_DETECTION | |
969 | /* Unlock this buffer's file, if it is locked. */ | |
970 | unlock_buffer (b); | |
971 | #endif /* CLASH_DETECTION */ | |
972 | ||
1ab256cb | 973 | kill_buffer_processes (buf); |
1ab256cb RM |
974 | |
975 | tem = Vinhibit_quit; | |
976 | Vinhibit_quit = Qt; | |
977 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); | |
978 | Freplace_buffer_in_windows (buf); | |
979 | Vinhibit_quit = tem; | |
980 | ||
9b59d6d0 | 981 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 982 | if (STRINGP (b->auto_save_file_name) |
9b59d6d0 | 983 | && b->auto_save_modified != 0) |
1ab256cb RM |
984 | { |
985 | Lisp_Object tem; | |
986 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 987 | if (! NILP (tem)) |
cbb6a418 | 988 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
989 | } |
990 | ||
336cd056 | 991 | if (! b->base_buffer) |
1ab256cb | 992 | { |
336cd056 RS |
993 | /* Unchain all markers of this buffer |
994 | and leave them pointing nowhere. */ | |
995 | for (tem = BUF_MARKERS (b); !EQ (tem, Qnil); ) | |
996 | { | |
997 | m = XMARKER (tem); | |
998 | m->buffer = 0; | |
999 | tem = m->chain; | |
1000 | m->chain = Qnil; | |
1001 | } | |
1002 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1003 | |
336cd056 RS |
1004 | #ifdef USE_TEXT_PROPERTIES |
1005 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1006 | #endif | |
1007 | ||
1008 | /* Perhaps we should explicitly free the interval tree here... */ | |
1009 | } | |
33f7013e | 1010 | |
1ab256cb | 1011 | b->name = Qnil; |
336cd056 | 1012 | |
9ac0d9e0 | 1013 | BLOCK_INPUT; |
336cd056 RS |
1014 | if (! b->base_buffer) |
1015 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1016 | ||
28e969dd JB |
1017 | if (b->newline_cache) |
1018 | { | |
1019 | free_region_cache (b->newline_cache); | |
1020 | b->newline_cache = 0; | |
1021 | } | |
1022 | if (b->width_run_cache) | |
1023 | { | |
1024 | free_region_cache (b->width_run_cache); | |
1025 | b->width_run_cache = 0; | |
1026 | } | |
1027 | b->width_table = Qnil; | |
9ac0d9e0 | 1028 | UNBLOCK_INPUT; |
1ab256cb RM |
1029 | b->undo_list = Qnil; |
1030 | ||
1031 | return Qt; | |
1032 | } | |
1033 | \f | |
36a8c287 JB |
1034 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1035 | we do this each time BUF is selected visibly, the more recently | |
1036 | selected buffers are always closer to the front of the list. This | |
1037 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1038 | |
1039 | record_buffer (buf) | |
1040 | Lisp_Object buf; | |
1041 | { | |
1042 | register Lisp_Object link, prev; | |
1043 | ||
1044 | prev = Qnil; | |
1045 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1046 | { | |
1047 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1048 | break; | |
1049 | prev = link; | |
1050 | } | |
1051 | ||
36a8c287 JB |
1052 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1053 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1054 | |
265a9e55 | 1055 | if (NILP (prev)) |
1ab256cb RM |
1056 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1057 | else | |
1058 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1059 | ||
1060 | XCONS(link)->cdr = Vbuffer_alist; | |
1061 | Vbuffer_alist = link; | |
1062 | } | |
1063 | ||
a9ee7a59 KH |
1064 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1065 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1066 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1067 | the current buffer's major mode.") | |
1068 | (buf) | |
1069 | Lisp_Object buf; | |
1070 | { | |
1071 | int count; | |
1072 | Lisp_Object function; | |
1073 | ||
1074 | function = buffer_defaults.major_mode; | |
1075 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1076 | function = current_buffer->major_mode; | |
1077 | ||
1078 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1079 | return Qnil; | |
1080 | ||
1081 | count = specpdl_ptr - specpdl; | |
1082 | ||
1083 | /* To select a nonfundamental mode, | |
1084 | select the buffer temporarily and then call the mode function. */ | |
1085 | ||
1086 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1087 | ||
1088 | Fset_buffer (buf); | |
1089 | call0 (function); | |
1090 | ||
1091 | return unbind_to (count, Qnil); | |
1092 | } | |
1093 | ||
1ab256cb RM |
1094 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1095 | "Select buffer BUFFER in the current window.\n\ | |
1096 | BUFFER may be a buffer or a buffer name.\n\ | |
1097 | Optional second arg NORECORD non-nil means\n\ | |
1098 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1099 | \n\ | |
1100 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1101 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1102 | the window-buffer correspondences.") | |
1103 | (bufname, norecord) | |
1104 | Lisp_Object bufname, norecord; | |
1105 | { | |
1106 | register Lisp_Object buf; | |
1107 | Lisp_Object tem; | |
1108 | ||
1109 | if (EQ (minibuf_window, selected_window)) | |
1110 | error ("Cannot switch buffers in minibuffer window"); | |
1111 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1112 | if (!NILP (tem)) |
1ab256cb RM |
1113 | error ("Cannot switch buffers in a dedicated window"); |
1114 | ||
265a9e55 | 1115 | if (NILP (bufname)) |
172a9c1f | 1116 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1117 | else |
a9ee7a59 KH |
1118 | { |
1119 | buf = Fget_buffer (bufname); | |
1120 | if (NILP (buf)) | |
1121 | { | |
1122 | buf = Fget_buffer_create (bufname); | |
1123 | Fset_buffer_major_mode (buf); | |
1124 | } | |
1125 | } | |
1ab256cb | 1126 | Fset_buffer (buf); |
265a9e55 | 1127 | if (NILP (norecord)) |
1ab256cb RM |
1128 | record_buffer (buf); |
1129 | ||
1130 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1131 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1132 | : selected_window, | |
1ab256cb RM |
1133 | buf); |
1134 | ||
e8b3a22d | 1135 | return buf; |
1ab256cb RM |
1136 | } |
1137 | ||
1138 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
1139 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
1140 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1141 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1142 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
1143 | window even if BUFFER is already visible in the selected window.") | |
1144 | (bufname, other) | |
1145 | Lisp_Object bufname, other; | |
1146 | { | |
1147 | register Lisp_Object buf; | |
265a9e55 | 1148 | if (NILP (bufname)) |
172a9c1f | 1149 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1150 | else |
7c2087ee RS |
1151 | { |
1152 | buf = Fget_buffer (bufname); | |
1153 | if (NILP (buf)) | |
1154 | { | |
1155 | buf = Fget_buffer_create (bufname); | |
1156 | Fset_buffer_major_mode (buf); | |
1157 | } | |
1158 | } | |
1ab256cb RM |
1159 | Fset_buffer (buf); |
1160 | record_buffer (buf); | |
1161 | Fselect_window (Fdisplay_buffer (buf, other)); | |
e8b3a22d | 1162 | return buf; |
1ab256cb RM |
1163 | } |
1164 | ||
1165 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1166 | "Return the current buffer as a Lisp object.") | |
1167 | () | |
1168 | { | |
1169 | register Lisp_Object buf; | |
67180c6a | 1170 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1171 | return buf; |
1172 | } | |
1173 | \f | |
1174 | /* Set the current buffer to b */ | |
1175 | ||
1176 | void | |
1177 | set_buffer_internal (b) | |
1178 | register struct buffer *b; | |
1179 | { | |
1180 | register struct buffer *old_buf; | |
1181 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1182 | Lisp_Object tem; |
1ab256cb RM |
1183 | |
1184 | if (current_buffer == b) | |
1185 | return; | |
1186 | ||
1187 | windows_or_buffers_changed = 1; | |
1188 | old_buf = current_buffer; | |
1189 | current_buffer = b; | |
1190 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1191 | ||
336cd056 RS |
1192 | if (old_buf) |
1193 | { | |
1194 | /* Put the undo list back in the base buffer, so that it appears | |
1195 | that an indirect buffer shares the undo list of its base. */ | |
1196 | if (old_buf->base_buffer) | |
1197 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1198 | ||
1199 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1200 | when it is not current, update them now. */ | |
1201 | if (! NILP (old_buf->pt_marker)) | |
1202 | { | |
1203 | Lisp_Object obuf; | |
1204 | XSETBUFFER (obuf, old_buf); | |
1205 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1206 | } | |
1207 | if (! NILP (old_buf->begv_marker)) | |
1208 | { | |
1209 | Lisp_Object obuf; | |
1210 | XSETBUFFER (obuf, old_buf); | |
1211 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1212 | } | |
1213 | if (! NILP (old_buf->zv_marker)) | |
1214 | { | |
1215 | Lisp_Object obuf; | |
1216 | XSETBUFFER (obuf, old_buf); | |
1217 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | /* Get the undo list from the base buffer, so that it appears | |
1222 | that an indirect buffer shares the undo list of its base. */ | |
1223 | if (b->base_buffer) | |
1224 | b->undo_list = b->base_buffer->undo_list; | |
1225 | ||
1226 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1227 | when it is not current, fetch them now. */ | |
1228 | if (! NILP (b->pt_marker)) | |
1229 | BUF_PT (b) = marker_position (b->pt_marker); | |
1230 | if (! NILP (b->begv_marker)) | |
1231 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1232 | if (! NILP (b->zv_marker)) | |
1233 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1234 | ||
1ab256cb RM |
1235 | /* Look down buffer's list of local Lisp variables |
1236 | to find and update any that forward into C variables. */ | |
1237 | ||
265a9e55 | 1238 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1239 | { |
1240 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1241 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1242 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1243 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1244 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1245 | /* Just reference the variable |
1246 | to cause it to become set for this buffer. */ | |
1247 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1248 | } | |
1249 | ||
1250 | /* Do the same with any others that were local to the previous buffer */ | |
1251 | ||
1252 | if (old_buf) | |
265a9e55 | 1253 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1254 | { |
1255 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1256 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1257 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1258 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1259 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1260 | /* Just reference the variable |
1261 | to cause it to become set for this buffer. */ | |
1262 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1263 | } | |
1264 | } | |
1265 | ||
336cd056 RS |
1266 | /* Switch to buffer B temporarily for redisplay purposes. |
1267 | This avoids certain things thatdon't need to be done within redisplay. */ | |
1268 | ||
1269 | void | |
1270 | set_buffer_temp (b) | |
1271 | struct buffer *b; | |
1272 | { | |
1273 | register struct buffer *old_buf; | |
1274 | ||
1275 | if (current_buffer == b) | |
1276 | return; | |
1277 | ||
1278 | old_buf = current_buffer; | |
1279 | current_buffer = b; | |
1280 | ||
1281 | if (old_buf) | |
1282 | { | |
1283 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1284 | when it is not current, update them now. */ | |
1285 | if (! NILP (old_buf->pt_marker)) | |
1286 | { | |
1287 | Lisp_Object obuf; | |
1288 | XSETBUFFER (obuf, old_buf); | |
1289 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1290 | } | |
1291 | if (! NILP (old_buf->begv_marker)) | |
1292 | { | |
1293 | Lisp_Object obuf; | |
1294 | XSETBUFFER (obuf, old_buf); | |
1295 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1296 | } | |
1297 | if (! NILP (old_buf->zv_marker)) | |
1298 | { | |
1299 | Lisp_Object obuf; | |
1300 | XSETBUFFER (obuf, old_buf); | |
1301 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1306 | when it is not current, fetch them now. */ | |
1307 | if (! NILP (b->pt_marker)) | |
1308 | BUF_PT (b) = marker_position (b->pt_marker); | |
1309 | if (! NILP (b->begv_marker)) | |
1310 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1311 | if (! NILP (b->zv_marker)) | |
1312 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1313 | } | |
1314 | ||
1ab256cb RM |
1315 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1316 | "Make the buffer BUFFER current for editing operations.\n\ | |
1317 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1318 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1319 | This function does not display the buffer, so its effect ends\n\ | |
1320 | when the current command terminates.\n\ | |
1321 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
1322 | (bufname) | |
1323 | register Lisp_Object bufname; | |
1324 | { | |
1325 | register Lisp_Object buffer; | |
1326 | buffer = Fget_buffer (bufname); | |
265a9e55 | 1327 | if (NILP (buffer)) |
1ab256cb | 1328 | nsberror (bufname); |
265a9e55 | 1329 | if (NILP (XBUFFER (buffer)->name)) |
1ab256cb RM |
1330 | error ("Selecting deleted buffer"); |
1331 | set_buffer_internal (XBUFFER (buffer)); | |
1332 | return buffer; | |
1333 | } | |
1334 | \f | |
1335 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1336 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1337 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1338 | () | |
1339 | { | |
a96b68f1 RS |
1340 | if (!NILP (current_buffer->read_only) |
1341 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1342 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1343 | return Qnil; | |
1344 | } | |
1345 | ||
1346 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1347 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1348 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1349 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1350 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1351 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1352 | selected window if it is displayed there.") | |
1ab256cb RM |
1353 | (buf) |
1354 | register Lisp_Object buf; | |
1355 | { | |
b271272a | 1356 | /* Figure out what buffer we're going to bury. */ |
265a9e55 | 1357 | if (NILP (buf)) |
a5611885 | 1358 | { |
67180c6a | 1359 | XSETBUFFER (buf, current_buffer); |
a5611885 JB |
1360 | |
1361 | /* If we're burying the current buffer, unshow it. */ | |
5fcd022d | 1362 | Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil); |
a5611885 | 1363 | } |
1ab256cb RM |
1364 | else |
1365 | { | |
1366 | Lisp_Object buf1; | |
1367 | ||
1368 | buf1 = Fget_buffer (buf); | |
265a9e55 | 1369 | if (NILP (buf1)) |
1ab256cb RM |
1370 | nsberror (buf); |
1371 | buf = buf1; | |
b271272a JB |
1372 | } |
1373 | ||
a5611885 | 1374 | /* Move buf to the end of the buffer list. */ |
b271272a JB |
1375 | { |
1376 | register Lisp_Object aelt, link; | |
1377 | ||
1378 | aelt = Frassq (buf, Vbuffer_alist); | |
1379 | link = Fmemq (aelt, Vbuffer_alist); | |
1380 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1381 | XCONS (link)->cdr = Qnil; | |
1382 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1383 | } | |
1ab256cb | 1384 | |
1ab256cb RM |
1385 | return Qnil; |
1386 | } | |
1387 | \f | |
c922bc55 | 1388 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1389 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1390 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1391 | so the buffer is truly empty after this.") |
1392 | () | |
1393 | { | |
1394 | Fwiden (); | |
1395 | del_range (BEG, Z); | |
1396 | current_buffer->last_window_start = 1; | |
1397 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1398 | if future size is less than past size. Use of erase-buffer | |
1399 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1400 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1401 | return Qnil; |
1402 | } | |
1403 | ||
1404 | validate_region (b, e) | |
1405 | register Lisp_Object *b, *e; | |
1406 | { | |
1ab256cb RM |
1407 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1408 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1409 | ||
1410 | if (XINT (*b) > XINT (*e)) | |
1411 | { | |
03192067 KH |
1412 | Lisp_Object tem; |
1413 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1414 | } |
1415 | ||
1416 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1417 | && XINT (*e) <= ZV)) | |
1418 | args_out_of_range (*b, *e); | |
1419 | } | |
1420 | \f | |
1ab256cb RM |
1421 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1422 | 0, 0, 0, | |
1423 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1424 | Most local variable bindings are eliminated so that the default values\n\ | |
1425 | become effective once more. Also, the syntax table is set from\n\ | |
1426 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1427 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1428 | This function also forces redisplay of the mode line.\n\ | |
1429 | \n\ | |
1430 | Every function to select a new major mode starts by\n\ | |
1431 | calling this function.\n\n\ | |
1432 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1433 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1434 | \n\ | |
1435 | The first thing this function does is run\n\ | |
1436 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1437 | () |
1438 | { | |
1439 | register Lisp_Object alist, sym, tem; | |
1440 | Lisp_Object oalist; | |
7410477a | 1441 | |
fd186f07 RS |
1442 | if (!NILP (Vrun_hooks)) |
1443 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1444 | oalist = current_buffer->local_var_alist; |
1445 | ||
1446 | /* Make sure no local variables remain set up with this buffer | |
1447 | for their current values. */ | |
1448 | ||
265a9e55 | 1449 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1450 | { |
1451 | sym = XCONS (XCONS (alist)->car)->car; | |
1452 | ||
1453 | /* Need not do anything if some other buffer's binding is now encached. */ | |
6746ed7a | 1454 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; |
1ab256cb RM |
1455 | if (XBUFFER (tem) == current_buffer) |
1456 | { | |
1457 | /* Symbol is set up for this buffer's old local value. | |
1458 | Set it up for the current buffer with the default value. */ | |
1459 | ||
6746ed7a | 1460 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; |
542143d7 RS |
1461 | /* Store the symbol's current value into the alist entry |
1462 | it is currently set up for. This is so that, if the | |
1463 | local is marked permanent, and we make it local again below, | |
1464 | we don't lose the value. */ | |
2735b685 | 1465 | XCONS (XCONS (tem)->car)->cdr |
6746ed7a | 1466 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); |
542143d7 | 1467 | /* Switch to the symbol's default-value alist entry. */ |
1ab256cb | 1468 | XCONS (tem)->car = tem; |
542143d7 | 1469 | /* Mark it as current for the current buffer. */ |
6746ed7a KH |
1470 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car |
1471 | = Fcurrent_buffer (); | |
542143d7 | 1472 | /* Store the current value into any forwarding in the symbol. */ |
6746ed7a | 1473 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, |
1ab256cb RM |
1474 | XCONS (tem)->cdr); |
1475 | } | |
1476 | } | |
1477 | ||
1478 | /* Actually eliminate all local bindings of this buffer. */ | |
1479 | ||
1480 | reset_buffer_local_variables (current_buffer); | |
1481 | ||
1482 | /* Redisplay mode lines; we are changing major mode. */ | |
1483 | ||
1484 | update_mode_lines++; | |
1485 | ||
1486 | /* Any which are supposed to be permanent, | |
1487 | make local again, with the same values they had. */ | |
1488 | ||
265a9e55 | 1489 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1490 | { |
1491 | sym = XCONS (XCONS (alist)->car)->car; | |
1492 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1493 | if (! NILP (tem)) |
01050cb5 RM |
1494 | { |
1495 | Fmake_local_variable (sym); | |
1496 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1497 | } | |
1ab256cb RM |
1498 | } |
1499 | ||
1500 | /* Force mode-line redisplay. Useful here because all major mode | |
1501 | commands call this function. */ | |
1502 | update_mode_lines++; | |
1503 | ||
1504 | return Qnil; | |
1505 | } | |
1506 | \f | |
2eec3b4e RS |
1507 | /* Find all the overlays in the current buffer that contain position POS. |
1508 | Return the number found, and store them in a vector in *VEC_PTR. | |
1509 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1510 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1511 | or ZV if there are no more overlays. | |
239c932b RS |
1512 | Store in *PREV_PTR the previous position after POS where an overlay ends, |
1513 | or BEGV if there are no previous overlays. | |
1514 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1515 | |
1516 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1517 | when this function is called. |
1518 | ||
1519 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1520 | If EXTEND is zero, we never extend the vector, | |
1521 | and we store only as many overlays as will fit. | |
1522 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1523 | |
1524 | int | |
239c932b | 1525 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1526 | int pos; |
61d54cd5 | 1527 | int extend; |
2eec3b4e RS |
1528 | Lisp_Object **vec_ptr; |
1529 | int *len_ptr; | |
1530 | int *next_ptr; | |
239c932b | 1531 | int *prev_ptr; |
1ab256cb | 1532 | { |
2eec3b4e RS |
1533 | Lisp_Object tail, overlay, start, end, result; |
1534 | int idx = 0; | |
1535 | int len = *len_ptr; | |
1536 | Lisp_Object *vec = *vec_ptr; | |
1537 | int next = ZV; | |
239c932b | 1538 | int prev = BEGV; |
61d54cd5 RS |
1539 | int inhibit_storing = 0; |
1540 | ||
2eec3b4e | 1541 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1542 | GC_CONSP (tail); |
2eec3b4e RS |
1543 | tail = XCONS (tail)->cdr) |
1544 | { | |
239c932b | 1545 | int startpos, endpos; |
52f8ec73 | 1546 | |
2eec3b4e | 1547 | overlay = XCONS (tail)->car; |
1ab256cb | 1548 | |
2eec3b4e RS |
1549 | start = OVERLAY_START (overlay); |
1550 | end = OVERLAY_END (overlay); | |
239c932b RS |
1551 | endpos = OVERLAY_POSITION (end); |
1552 | if (endpos < pos) | |
1553 | { | |
1554 | if (prev < endpos) | |
1555 | prev = endpos; | |
1556 | break; | |
1557 | } | |
1558 | if (endpos == pos) | |
1559 | continue; | |
2eec3b4e RS |
1560 | startpos = OVERLAY_POSITION (start); |
1561 | if (startpos <= pos) | |
1562 | { | |
1563 | if (idx == len) | |
1564 | { | |
61d54cd5 RS |
1565 | /* The supplied vector is full. |
1566 | Either make it bigger, or don't store any more in it. */ | |
1567 | if (extend) | |
1568 | { | |
1569 | *len_ptr = len *= 2; | |
1570 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1571 | *vec_ptr = vec; | |
1572 | } | |
1573 | else | |
1574 | inhibit_storing = 1; | |
2eec3b4e | 1575 | } |
61d54cd5 RS |
1576 | |
1577 | if (!inhibit_storing) | |
1578 | vec[idx] = overlay; | |
1579 | /* Keep counting overlays even if we can't return them all. */ | |
1580 | idx++; | |
2eec3b4e RS |
1581 | } |
1582 | else if (startpos < next) | |
1583 | next = startpos; | |
1584 | } | |
1585 | ||
1586 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1587 | GC_CONSP (tail); |
2eec3b4e | 1588 | tail = XCONS (tail)->cdr) |
1ab256cb | 1589 | { |
239c932b | 1590 | int startpos, endpos; |
52f8ec73 | 1591 | |
2eec3b4e | 1592 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1593 | |
1594 | start = OVERLAY_START (overlay); | |
1595 | end = OVERLAY_END (overlay); | |
1596 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1597 | if (pos < startpos) |
2eec3b4e RS |
1598 | { |
1599 | if (startpos < next) | |
1600 | next = startpos; | |
1601 | break; | |
1602 | } | |
239c932b RS |
1603 | endpos = OVERLAY_POSITION (end); |
1604 | if (pos < endpos) | |
2eec3b4e RS |
1605 | { |
1606 | if (idx == len) | |
1607 | { | |
61d54cd5 RS |
1608 | if (extend) |
1609 | { | |
1610 | *len_ptr = len *= 2; | |
1611 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1612 | *vec_ptr = vec; | |
1613 | } | |
1614 | else | |
1615 | inhibit_storing = 1; | |
2eec3b4e | 1616 | } |
61d54cd5 RS |
1617 | |
1618 | if (!inhibit_storing) | |
1619 | vec[idx] = overlay; | |
1620 | idx++; | |
2eec3b4e | 1621 | } |
239c932b RS |
1622 | else if (endpos < pos && endpos > prev) |
1623 | prev = endpos; | |
1ab256cb RM |
1624 | } |
1625 | ||
239c932b RS |
1626 | if (next_ptr) |
1627 | *next_ptr = next; | |
1628 | if (prev_ptr) | |
1629 | *prev_ptr = prev; | |
2eec3b4e RS |
1630 | return idx; |
1631 | } | |
1632 | \f | |
5985d248 KH |
1633 | struct sortvec |
1634 | { | |
1635 | Lisp_Object overlay; | |
1636 | int beg, end; | |
1637 | int priority; | |
1638 | }; | |
1639 | ||
1640 | static int | |
1641 | compare_overlays (s1, s2) | |
1642 | struct sortvec *s1, *s2; | |
1643 | { | |
1644 | if (s1->priority != s2->priority) | |
1645 | return s1->priority - s2->priority; | |
1646 | if (s1->beg != s2->beg) | |
1647 | return s1->beg - s2->beg; | |
1648 | if (s1->end != s2->end) | |
1649 | return s2->end - s1->end; | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | /* Sort an array of overlays by priority. The array is modified in place. | |
1654 | The return value is the new size; this may be smaller than the original | |
1655 | size if some of the overlays were invalid or were window-specific. */ | |
1656 | int | |
1657 | sort_overlays (overlay_vec, noverlays, w) | |
1658 | Lisp_Object *overlay_vec; | |
1659 | int noverlays; | |
1660 | struct window *w; | |
1661 | { | |
1662 | int i, j; | |
1663 | struct sortvec *sortvec; | |
1664 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1665 | ||
1666 | /* Put the valid and relevant overlays into sortvec. */ | |
1667 | ||
1668 | for (i = 0, j = 0; i < noverlays; i++) | |
1669 | { | |
0fa767e7 | 1670 | Lisp_Object tem; |
c99fc30f | 1671 | Lisp_Object overlay; |
5985d248 | 1672 | |
c99fc30f | 1673 | overlay = overlay_vec[i]; |
5985d248 KH |
1674 | if (OVERLAY_VALID (overlay) |
1675 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1676 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1677 | { | |
0fa767e7 KH |
1678 | /* If we're interested in a specific window, then ignore |
1679 | overlays that are limited to some other window. */ | |
1680 | if (w) | |
5985d248 | 1681 | { |
0fa767e7 KH |
1682 | Lisp_Object window; |
1683 | ||
1684 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 1685 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 1686 | continue; |
5985d248 | 1687 | } |
0fa767e7 KH |
1688 | |
1689 | /* This overlay is good and counts: put it into sortvec. */ | |
1690 | sortvec[j].overlay = overlay; | |
1691 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1692 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1693 | tem = Foverlay_get (overlay, Qpriority); | |
1694 | if (INTEGERP (tem)) | |
1695 | sortvec[j].priority = XINT (tem); | |
1696 | else | |
1697 | sortvec[j].priority = 0; | |
1698 | j++; | |
5985d248 KH |
1699 | } |
1700 | } | |
1701 | noverlays = j; | |
1702 | ||
1703 | /* Sort the overlays into the proper order: increasing priority. */ | |
1704 | ||
1705 | if (noverlays > 1) | |
1706 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
1707 | ||
1708 | for (i = 0; i < noverlays; i++) | |
1709 | overlay_vec[i] = sortvec[i].overlay; | |
1710 | return (noverlays); | |
1711 | } | |
1712 | \f | |
5c4f68f1 | 1713 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 1714 | |
2eec3b4e | 1715 | void |
5c4f68f1 JB |
1716 | recenter_overlay_lists (buf, pos) |
1717 | struct buffer *buf; | |
2eec3b4e RS |
1718 | int pos; |
1719 | { | |
1720 | Lisp_Object overlay, tail, next, prev, beg, end; | |
1721 | ||
1722 | /* See if anything in overlays_before should move to overlays_after. */ | |
1723 | ||
1724 | /* We don't strictly need prev in this loop; it should always be nil. | |
1725 | But we use it for symmetry and in case that should cease to be true | |
1726 | with some future change. */ | |
1727 | prev = Qnil; | |
5c4f68f1 | 1728 | for (tail = buf->overlays_before; |
2eec3b4e RS |
1729 | CONSP (tail); |
1730 | prev = tail, tail = next) | |
1ab256cb | 1731 | { |
2eec3b4e RS |
1732 | next = XCONS (tail)->cdr; |
1733 | overlay = XCONS (tail)->car; | |
1734 | ||
1735 | /* If the overlay is not valid, get rid of it. */ | |
1736 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1737 | #if 1 |
1738 | abort (); | |
1739 | #else | |
2eec3b4e RS |
1740 | { |
1741 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1742 | if (!NILP (prev)) | |
1743 | XCONS (prev)->cdr = next; | |
1744 | else | |
5c4f68f1 | 1745 | buf->overlays_before = next; |
2eec3b4e RS |
1746 | tail = prev; |
1747 | continue; | |
1748 | } | |
52f8ec73 | 1749 | #endif |
1ab256cb | 1750 | |
2eec3b4e RS |
1751 | beg = OVERLAY_START (overlay); |
1752 | end = OVERLAY_END (overlay); | |
1ab256cb | 1753 | |
2eec3b4e | 1754 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 1755 | { |
2eec3b4e RS |
1756 | /* OVERLAY needs to be moved. */ |
1757 | int where = OVERLAY_POSITION (beg); | |
1758 | Lisp_Object other, other_prev; | |
1759 | ||
1760 | /* Splice the cons cell TAIL out of overlays_before. */ | |
1761 | if (!NILP (prev)) | |
1762 | XCONS (prev)->cdr = next; | |
1763 | else | |
5c4f68f1 | 1764 | buf->overlays_before = next; |
2eec3b4e RS |
1765 | |
1766 | /* Search thru overlays_after for where to put it. */ | |
1767 | other_prev = Qnil; | |
5c4f68f1 | 1768 | for (other = buf->overlays_after; |
2eec3b4e RS |
1769 | CONSP (other); |
1770 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 1771 | { |
2eec3b4e RS |
1772 | Lisp_Object otherbeg, otheroverlay, follower; |
1773 | int win; | |
1774 | ||
1775 | otheroverlay = XCONS (other)->car; | |
1776 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1777 | abort (); |
2eec3b4e RS |
1778 | |
1779 | otherbeg = OVERLAY_START (otheroverlay); | |
1780 | if (OVERLAY_POSITION (otherbeg) >= where) | |
1781 | break; | |
1ab256cb | 1782 | } |
2eec3b4e RS |
1783 | |
1784 | /* Add TAIL to overlays_after before OTHER. */ | |
1785 | XCONS (tail)->cdr = other; | |
1786 | if (!NILP (other_prev)) | |
1787 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 1788 | else |
5c4f68f1 | 1789 | buf->overlays_after = tail; |
2eec3b4e | 1790 | tail = prev; |
1ab256cb | 1791 | } |
2eec3b4e RS |
1792 | else |
1793 | /* We've reached the things that should stay in overlays_before. | |
1794 | All the rest of overlays_before must end even earlier, | |
1795 | so stop now. */ | |
1796 | break; | |
1797 | } | |
1798 | ||
1799 | /* See if anything in overlays_after should be in overlays_before. */ | |
1800 | prev = Qnil; | |
5c4f68f1 | 1801 | for (tail = buf->overlays_after; |
2eec3b4e RS |
1802 | CONSP (tail); |
1803 | prev = tail, tail = next) | |
1804 | { | |
1805 | next = XCONS (tail)->cdr; | |
1806 | overlay = XCONS (tail)->car; | |
1807 | ||
1808 | /* If the overlay is not valid, get rid of it. */ | |
1809 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
1810 | #if 1 |
1811 | abort (); | |
1812 | #else | |
2eec3b4e RS |
1813 | { |
1814 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1815 | if (!NILP (prev)) | |
1816 | XCONS (prev)->cdr = next; | |
1817 | else | |
5c4f68f1 | 1818 | buf->overlays_after = next; |
2eec3b4e RS |
1819 | tail = prev; |
1820 | continue; | |
1821 | } | |
52f8ec73 | 1822 | #endif |
2eec3b4e RS |
1823 | |
1824 | beg = OVERLAY_START (overlay); | |
1825 | end = OVERLAY_END (overlay); | |
1826 | ||
1827 | /* Stop looking, when we know that nothing further | |
1828 | can possibly end before POS. */ | |
1829 | if (OVERLAY_POSITION (beg) > pos) | |
1830 | break; | |
1831 | ||
1832 | if (OVERLAY_POSITION (end) <= pos) | |
1833 | { | |
1834 | /* OVERLAY needs to be moved. */ | |
1835 | int where = OVERLAY_POSITION (end); | |
1836 | Lisp_Object other, other_prev; | |
1837 | ||
1838 | /* Splice the cons cell TAIL out of overlays_after. */ | |
1839 | if (!NILP (prev)) | |
1840 | XCONS (prev)->cdr = next; | |
1841 | else | |
5c4f68f1 | 1842 | buf->overlays_after = next; |
2eec3b4e RS |
1843 | |
1844 | /* Search thru overlays_before for where to put it. */ | |
1845 | other_prev = Qnil; | |
5c4f68f1 | 1846 | for (other = buf->overlays_before; |
2eec3b4e RS |
1847 | CONSP (other); |
1848 | other_prev = other, other = XCONS (other)->cdr) | |
1849 | { | |
1850 | Lisp_Object otherend, otheroverlay; | |
1851 | int win; | |
1852 | ||
1853 | otheroverlay = XCONS (other)->car; | |
1854 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 1855 | abort (); |
2eec3b4e RS |
1856 | |
1857 | otherend = OVERLAY_END (otheroverlay); | |
1858 | if (OVERLAY_POSITION (otherend) <= where) | |
1859 | break; | |
1860 | } | |
1861 | ||
1862 | /* Add TAIL to overlays_before before OTHER. */ | |
1863 | XCONS (tail)->cdr = other; | |
1864 | if (!NILP (other_prev)) | |
1865 | XCONS (other_prev)->cdr = tail; | |
1866 | else | |
5c4f68f1 | 1867 | buf->overlays_before = tail; |
2eec3b4e RS |
1868 | tail = prev; |
1869 | } | |
1870 | } | |
1871 | ||
8d7a4592 | 1872 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 1873 | } |
2b1bdf65 KH |
1874 | |
1875 | /* Fix up overlays that were garbled as a result of permuting markers | |
1876 | in the range START through END. Any overlay with at least one | |
1877 | endpoint in this range will need to be unlinked from the overlay | |
1878 | list and reinserted in its proper place. | |
1879 | Such an overlay might even have negative size at this point. | |
1880 | If so, we'll reverse the endpoints. Can you think of anything | |
1881 | better to do in this situation? */ | |
1882 | void | |
1883 | fix_overlays_in_range (start, end) | |
1884 | register int start, end; | |
1885 | { | |
1886 | Lisp_Object tem, overlay; | |
1887 | Lisp_Object before_list, after_list; | |
1888 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
1889 | int startpos, endpos; | |
1890 | ||
1891 | /* This algorithm shifts links around instead of consing and GCing. | |
1892 | The loop invariant is that before_list (resp. after_list) is a | |
1893 | well-formed list except that its last element, the one that | |
1894 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
1895 | So it's not a bug that before_list isn't initialized, although | |
1896 | it may look strange. */ | |
1897 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
1898 | { | |
1899 | overlay = XCONS (*ptail)->car; | |
1900 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1901 | if (endpos < start) | |
1902 | break; | |
1903 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1904 | if (endpos < end | |
1905 | || (startpos >= start && startpos < end)) | |
1906 | { | |
1907 | /* If the overlay is backwards, fix that now. */ | |
1908 | if (startpos > endpos) | |
1909 | { | |
1910 | int tem; | |
1911 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1912 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1913 | tem = startpos; startpos = endpos; endpos = tem; | |
1914 | } | |
1915 | /* Add it to the end of the wrong list. Later on, | |
1916 | recenter_overlay_lists will move it to the right place. */ | |
1917 | if (endpos < XINT (current_buffer->overlay_center)) | |
1918 | { | |
1919 | *pafter = *ptail; | |
1920 | pafter = &XCONS (*ptail)->cdr; | |
1921 | } | |
1922 | else | |
1923 | { | |
1924 | *pbefore = *ptail; | |
1925 | pbefore = &XCONS (*ptail)->cdr; | |
1926 | } | |
1927 | *ptail = XCONS (*ptail)->cdr; | |
1928 | } | |
1929 | else | |
1930 | ptail = &XCONS (*ptail)->cdr; | |
1931 | } | |
1932 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
1933 | { | |
1934 | overlay = XCONS (*ptail)->car; | |
1935 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1936 | if (startpos >= end) | |
1937 | break; | |
1938 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1939 | if (startpos >= start | |
1940 | || (endpos >= start && endpos < end)) | |
1941 | { | |
1942 | if (startpos > endpos) | |
1943 | { | |
1944 | int tem; | |
1945 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
1946 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
1947 | tem = startpos; startpos = endpos; endpos = tem; | |
1948 | } | |
1949 | if (endpos < XINT (current_buffer->overlay_center)) | |
1950 | { | |
1951 | *pafter = *ptail; | |
1952 | pafter = &XCONS (*ptail)->cdr; | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | *pbefore = *ptail; | |
1957 | pbefore = &XCONS (*ptail)->cdr; | |
1958 | } | |
1959 | *ptail = XCONS (*ptail)->cdr; | |
1960 | } | |
1961 | else | |
1962 | ptail = &XCONS (*ptail)->cdr; | |
1963 | } | |
1964 | ||
1965 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
1966 | and let the recenter function make it sane again. */ | |
1967 | *pbefore = current_buffer->overlays_before; | |
1968 | current_buffer->overlays_before = before_list; | |
1969 | recenter_overlay_lists (current_buffer, | |
1970 | XINT (current_buffer->overlay_center)); | |
1971 | ||
1972 | *pafter = current_buffer->overlays_after; | |
1973 | current_buffer->overlays_after = after_list; | |
1974 | recenter_overlay_lists (current_buffer, | |
1975 | XINT (current_buffer->overlay_center)); | |
1976 | } | |
2eec3b4e | 1977 | \f |
52f8ec73 JB |
1978 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
1979 | "Return t if OBJECT is an overlay.") | |
1980 | (object) | |
1981 | Lisp_Object object; | |
1982 | { | |
1983 | return (OVERLAYP (object) ? Qt : Qnil); | |
1984 | } | |
1985 | ||
5c4f68f1 JB |
1986 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0, |
1987 | "Create a new overlay with range BEG to END in BUFFER.\n\ | |
1988 | If omitted, BUFFER defaults to the current buffer.\n\ | |
2eec3b4e | 1989 | BEG and END may be integers or markers.") |
5c4f68f1 JB |
1990 | (beg, end, buffer) |
1991 | Lisp_Object beg, end, buffer; | |
2eec3b4e RS |
1992 | { |
1993 | Lisp_Object overlay; | |
5c4f68f1 | 1994 | struct buffer *b; |
2eec3b4e | 1995 | |
5c4f68f1 | 1996 | if (NILP (buffer)) |
67180c6a | 1997 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
1998 | else |
1999 | CHECK_BUFFER (buffer, 2); | |
2000 | if (MARKERP (beg) | |
2001 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2002 | error ("Marker points into wrong buffer"); | |
2003 | if (MARKERP (end) | |
2004 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2005 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 2006 | |
883047b9 JB |
2007 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2008 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2009 | |
883047b9 | 2010 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2011 | { |
c99fc30f KH |
2012 | Lisp_Object temp; |
2013 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2014 | } |
883047b9 JB |
2015 | |
2016 | b = XBUFFER (buffer); | |
2017 | ||
2018 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2019 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2020 | |
48e2e3ba KH |
2021 | overlay = allocate_misc (); |
2022 | XMISC (overlay)->type = Lisp_Misc_Overlay; | |
2023 | XOVERLAY (overlay)->start = beg; | |
2024 | XOVERLAY (overlay)->end = end; | |
2025 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2026 | |
2027 | /* Put the new overlay on the wrong list. */ | |
2028 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2029 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2030 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2031 | else |
5c4f68f1 | 2032 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2033 | |
2034 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2035 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2036 | |
b61982dd JB |
2037 | /* We don't need to redisplay the region covered by the overlay, because |
2038 | the overlay has no properties at the moment. */ | |
2039 | ||
2eec3b4e RS |
2040 | return overlay; |
2041 | } | |
2042 | ||
5c4f68f1 JB |
2043 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2044 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2045 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2046 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2047 | buffer.") | |
5c4f68f1 JB |
2048 | (overlay, beg, end, buffer) |
2049 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2050 | { |
0a4469c9 RS |
2051 | struct buffer *b, *ob; |
2052 | Lisp_Object obuffer; | |
2053 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2054 | |
52f8ec73 | 2055 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2056 | if (NILP (buffer)) |
2057 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2058 | if (NILP (buffer)) |
67180c6a | 2059 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2060 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2061 | |
2062 | if (MARKERP (beg) | |
2063 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2064 | error ("Marker points into wrong buffer"); | |
2065 | if (MARKERP (end) | |
2066 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2067 | error ("Marker points into wrong buffer"); | |
2068 | ||
b61982dd JB |
2069 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2070 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2071 | ||
9d7608b7 KH |
2072 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2073 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2074 | |
b61982dd JB |
2075 | if (XINT (beg) > XINT (end)) |
2076 | { | |
c99fc30f KH |
2077 | Lisp_Object temp; |
2078 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2079 | } |
2080 | ||
9d7608b7 KH |
2081 | specbind (Qinhibit_quit, Qt); |
2082 | ||
0a4469c9 | 2083 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2084 | b = XBUFFER (buffer); |
0a4469c9 | 2085 | ob = XBUFFER (obuffer); |
2eec3b4e | 2086 | |
c82ed728 | 2087 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2088 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2089 | { |
2090 | /* Redisplay where the overlay was. */ | |
2091 | if (!NILP (obuffer)) | |
2092 | { | |
2093 | Lisp_Object o_beg; | |
2094 | Lisp_Object o_end; | |
2095 | ||
2096 | o_beg = OVERLAY_START (overlay); | |
2097 | o_end = OVERLAY_END (overlay); | |
2098 | o_beg = OVERLAY_POSITION (o_beg); | |
2099 | o_end = OVERLAY_POSITION (o_end); | |
2100 | ||
efd90478 | 2101 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2102 | } |
2103 | ||
2104 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 2105 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a RS |
2106 | |
2107 | /* Don't limit redisplay to the selected window. */ | |
2108 | windows_or_buffers_changed = 1; | |
2109 | } | |
c82ed728 JB |
2110 | else |
2111 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2112 | { | |
be8b1c6b RS |
2113 | Lisp_Object o_beg; |
2114 | Lisp_Object o_end; | |
c82ed728 JB |
2115 | int change_beg, change_end; |
2116 | ||
be8b1c6b RS |
2117 | o_beg = OVERLAY_START (overlay); |
2118 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
2119 | o_beg = OVERLAY_POSITION (o_beg); |
2120 | o_end = OVERLAY_POSITION (o_end); | |
2121 | ||
2122 | if (XINT (o_beg) == XINT (beg)) | |
2123 | redisplay_region (b, XINT (o_end), XINT (end)); | |
2124 | else if (XINT (o_end) == XINT (end)) | |
2125 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
2126 | else | |
2127 | { | |
2128 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2129 | if (XINT (end) > XINT (o_end)) o_end = end; | |
2130 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
2131 | } | |
2132 | } | |
b61982dd | 2133 | |
0a4469c9 RS |
2134 | if (!NILP (obuffer)) |
2135 | { | |
2136 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2137 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2138 | } | |
5c4f68f1 JB |
2139 | |
2140 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2141 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2142 | |
2143 | /* Put the overlay on the wrong list. */ | |
2144 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2145 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2146 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2147 | else |
5c4f68f1 | 2148 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2149 | |
2150 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2151 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2152 | |
0a4469c9 | 2153 | return unbind_to (count, overlay); |
2eec3b4e RS |
2154 | } |
2155 | ||
2156 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2157 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2158 | (overlay) |
5c4f68f1 | 2159 | Lisp_Object overlay; |
2eec3b4e | 2160 | { |
0a4469c9 | 2161 | Lisp_Object buffer; |
5c4f68f1 | 2162 | struct buffer *b; |
0a4469c9 | 2163 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2164 | |
52f8ec73 JB |
2165 | CHECK_OVERLAY (overlay, 0); |
2166 | ||
0a4469c9 RS |
2167 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2168 | if (NILP (buffer)) | |
2169 | return Qnil; | |
2170 | ||
2171 | b = XBUFFER (buffer); | |
2172 | ||
2173 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2174 | |
2175 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2176 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2177 | ||
b61982dd | 2178 | redisplay_region (b, |
a927f5c9 RS |
2179 | marker_position (OVERLAY_START (overlay)), |
2180 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2181 | |
3ece337a JB |
2182 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2183 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2184 | ||
0a4469c9 | 2185 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2186 | } |
2187 | \f | |
8ebafa8d JB |
2188 | /* Overlay dissection functions. */ |
2189 | ||
2190 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2191 | "Return the position at which OVERLAY starts.") | |
2192 | (overlay) | |
2193 | Lisp_Object overlay; | |
2194 | { | |
2195 | CHECK_OVERLAY (overlay, 0); | |
2196 | ||
2197 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2198 | } | |
2199 | ||
2200 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2201 | "Return the position at which OVERLAY ends.") | |
2202 | (overlay) | |
2203 | Lisp_Object overlay; | |
2204 | { | |
2205 | CHECK_OVERLAY (overlay, 0); | |
2206 | ||
2207 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2208 | } | |
2209 | ||
2210 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2211 | "Return the buffer OVERLAY belongs to.") | |
2212 | (overlay) | |
2213 | Lisp_Object overlay; | |
2214 | { | |
2215 | CHECK_OVERLAY (overlay, 0); | |
2216 | ||
2217 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2218 | } | |
2219 | ||
2220 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2221 | "Return a list of the properties on OVERLAY.\n\ | |
2222 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2223 | OVERLAY.") | |
2224 | (overlay) | |
2225 | Lisp_Object overlay; | |
2226 | { | |
2227 | CHECK_OVERLAY (overlay, 0); | |
2228 | ||
48e2e3ba | 2229 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2230 | } |
2231 | ||
2232 | \f | |
2eec3b4e | 2233 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2234 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2235 | (pos) |
2236 | Lisp_Object pos; | |
2237 | { | |
2238 | int noverlays; | |
2eec3b4e RS |
2239 | Lisp_Object *overlay_vec; |
2240 | int len; | |
2241 | Lisp_Object result; | |
2242 | ||
2243 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2244 | ||
2245 | len = 10; | |
2246 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2247 | ||
2248 | /* Put all the overlays we want in a vector in overlay_vec. | |
2249 | Store the length in len. */ | |
239c932b | 2250 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, NULL); |
2eec3b4e RS |
2251 | |
2252 | /* Make a list of them all. */ | |
2253 | result = Flist (noverlays, overlay_vec); | |
2254 | ||
9ac0d9e0 | 2255 | xfree (overlay_vec); |
2eec3b4e RS |
2256 | return result; |
2257 | } | |
2258 | ||
2259 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, | |
2260 | 1, 1, 0, | |
bbe20e81 KH |
2261 | "Return the next position after POS where an overlay starts or ends.\n\ |
2262 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2263 | (pos) |
2264 | Lisp_Object pos; | |
2265 | { | |
2266 | int noverlays; | |
2267 | int endpos; | |
2268 | Lisp_Object *overlay_vec; | |
2269 | int len; | |
2eec3b4e RS |
2270 | int i; |
2271 | ||
2272 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2273 | ||
2274 | len = 10; | |
2275 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2276 | ||
2277 | /* Put all the overlays we want in a vector in overlay_vec. | |
2278 | Store the length in len. | |
2279 | endpos gets the position where the next overlay starts. */ | |
239c932b | 2280 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos, NULL); |
2eec3b4e RS |
2281 | |
2282 | /* If any of these overlays ends before endpos, | |
2283 | use its ending point instead. */ | |
2284 | for (i = 0; i < noverlays; i++) | |
2285 | { | |
2286 | Lisp_Object oend; | |
2287 | int oendpos; | |
2288 | ||
2289 | oend = OVERLAY_END (overlay_vec[i]); | |
2290 | oendpos = OVERLAY_POSITION (oend); | |
2291 | if (oendpos < endpos) | |
2292 | endpos = oendpos; | |
1ab256cb RM |
2293 | } |
2294 | ||
9ac0d9e0 | 2295 | xfree (overlay_vec); |
2eec3b4e RS |
2296 | return make_number (endpos); |
2297 | } | |
239c932b RS |
2298 | |
2299 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2300 | Sprevious_overlay_change, 1, 1, 0, | |
2301 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
2302 | If there are no more overlay boundaries after POS, return (point-min).") | |
2303 | (pos) | |
2304 | Lisp_Object pos; | |
2305 | { | |
2306 | int noverlays; | |
2307 | int prevpos; | |
2308 | Lisp_Object *overlay_vec; | |
2309 | int len; | |
2310 | int i; | |
2311 | ||
2312 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2313 | ||
2314 | len = 10; | |
2315 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2316 | ||
2317 | /* Put all the overlays we want in a vector in overlay_vec. | |
2318 | Store the length in len. | |
2319 | prevpos gets the position of an overlay end. */ | |
2320 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, &prevpos); | |
2321 | ||
2322 | /* If any of these overlays starts before endpos, | |
2323 | maybe use its starting point instead. */ | |
2324 | for (i = 0; i < noverlays; i++) | |
2325 | { | |
2326 | Lisp_Object ostart; | |
2327 | int ostartpos; | |
2328 | ||
2329 | ostart = OVERLAY_START (overlay_vec[i]); | |
2330 | ostartpos = OVERLAY_POSITION (ostart); | |
2331 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2332 | prevpos = ostartpos; | |
2333 | } | |
2334 | ||
2335 | xfree (overlay_vec); | |
2336 | return make_number (prevpos); | |
2337 | } | |
2eec3b4e RS |
2338 | \f |
2339 | /* These functions are for debugging overlays. */ | |
2340 | ||
2341 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2342 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2343 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2344 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2345 | Recentering overlays moves overlays between these lists.\n\ |
2346 | The lists you get are copies, so that changing them has no effect.\n\ | |
2347 | However, the overlays you get are the real objects that the buffer uses.") | |
2348 | () | |
2349 | { | |
2350 | Lisp_Object before, after; | |
2351 | before = current_buffer->overlays_before; | |
2352 | if (CONSP (before)) | |
2353 | before = Fcopy_sequence (before); | |
2354 | after = current_buffer->overlays_after; | |
2355 | if (CONSP (after)) | |
2356 | after = Fcopy_sequence (after); | |
2357 | ||
2358 | return Fcons (before, after); | |
2359 | } | |
2360 | ||
2361 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2362 | "Recenter the overlays of the current buffer around position POS.") | |
2363 | (pos) | |
2364 | Lisp_Object pos; | |
2365 | { | |
2366 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2367 | ||
5c4f68f1 | 2368 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2369 | return Qnil; |
2370 | } | |
2371 | \f | |
2372 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
2373 | "Get the property of overlay OVERLAY with property name NAME.") | |
2374 | (overlay, prop) | |
2375 | Lisp_Object overlay, prop; | |
2376 | { | |
cab4777e | 2377 | Lisp_Object plist, fallback; |
52f8ec73 JB |
2378 | |
2379 | CHECK_OVERLAY (overlay, 0); | |
2380 | ||
cab4777e RS |
2381 | fallback = Qnil; |
2382 | ||
48e2e3ba | 2383 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2384 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2385 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2386 | { | |
2387 | if (EQ (XCONS (plist)->car, prop)) | |
2388 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
2389 | else if (EQ (XCONS (plist)->car, Qcategory)) |
2390 | { | |
2391 | Lisp_Object tem; | |
2392 | tem = Fcar (Fcdr (plist)); | |
2393 | if (SYMBOLP (tem)) | |
2394 | fallback = Fget (tem, prop); | |
2395 | } | |
2eec3b4e | 2396 | } |
52f8ec73 | 2397 | |
cab4777e | 2398 | return fallback; |
2eec3b4e RS |
2399 | } |
2400 | ||
2401 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
2402 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
2403 | (overlay, prop, value) | |
2404 | Lisp_Object overlay, prop, value; | |
2405 | { | |
48e2e3ba | 2406 | Lisp_Object tail, buffer; |
9d7608b7 | 2407 | int changed; |
2eec3b4e | 2408 | |
52f8ec73 | 2409 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 2410 | |
274a9425 RS |
2411 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2412 | ||
48e2e3ba | 2413 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2414 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
2415 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
2416 | if (EQ (XCONS (tail)->car, prop)) |
2417 | { | |
9d7608b7 KH |
2418 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
2419 | XCONS (XCONS (tail)->cdr)->car = value; | |
2420 | goto found; | |
274a9425 | 2421 | } |
9d7608b7 KH |
2422 | /* It wasn't in the list, so add it to the front. */ |
2423 | changed = !NILP (value); | |
48e2e3ba KH |
2424 | XOVERLAY (overlay)->plist |
2425 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
2426 | found: |
2427 | if (! NILP (buffer)) | |
2428 | { | |
2429 | if (changed) | |
2430 | redisplay_region (XBUFFER (buffer), | |
2431 | marker_position (OVERLAY_START (overlay)), | |
2432 | marker_position (OVERLAY_END (overlay))); | |
2433 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
2434 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
2435 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
2436 | Fdelete_overlay (overlay); | |
2437 | } | |
2eec3b4e | 2438 | return value; |
1ab256cb RM |
2439 | } |
2440 | \f | |
173f2a64 RS |
2441 | /* Run the modification-hooks of overlays that include |
2442 | any part of the text in START to END. | |
2443 | Run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
2444 | and the insert-after-hooks of overlay ending at START. |
2445 | ||
2446 | This is called both before and after the modification. | |
2447 | AFTER is nonzero when we call after the modification. | |
2448 | ||
2449 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. */ | |
173f2a64 RS |
2450 | |
2451 | void | |
930a9140 | 2452 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 2453 | Lisp_Object start, end; |
930a9140 RS |
2454 | int after; |
2455 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
2456 | { |
2457 | Lisp_Object prop, overlay, tail; | |
2458 | int insertion = EQ (start, end); | |
55b48893 | 2459 | int tail_copied; |
930a9140 | 2460 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
2461 | |
2462 | overlay = Qnil; | |
2463 | tail = Qnil; | |
930a9140 | 2464 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 2465 | |
55b48893 | 2466 | tail_copied = 0; |
173f2a64 RS |
2467 | for (tail = current_buffer->overlays_before; |
2468 | CONSP (tail); | |
2469 | tail = XCONS (tail)->cdr) | |
2470 | { | |
2471 | int startpos, endpos; | |
be8b1c6b | 2472 | Lisp_Object ostart, oend; |
173f2a64 RS |
2473 | |
2474 | overlay = XCONS (tail)->car; | |
2475 | ||
2476 | ostart = OVERLAY_START (overlay); | |
2477 | oend = OVERLAY_END (overlay); | |
2478 | endpos = OVERLAY_POSITION (oend); | |
2479 | if (XFASTINT (start) > endpos) | |
2480 | break; | |
2481 | startpos = OVERLAY_POSITION (ostart); | |
2482 | if (XFASTINT (end) == startpos && insertion) | |
2483 | { | |
2484 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2485 | if (!NILP (prop)) |
2486 | { | |
2487 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
2488 | if (!tail_copied) |
2489 | tail = Fcopy_sequence (tail); | |
2490 | tail_copied = 1; | |
930a9140 | 2491 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2492 | } |
173f2a64 RS |
2493 | } |
2494 | if (XFASTINT (start) == endpos && insertion) | |
2495 | { | |
2496 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2497 | if (!NILP (prop)) |
2498 | { | |
55b48893 RS |
2499 | if (!tail_copied) |
2500 | tail = Fcopy_sequence (tail); | |
2501 | tail_copied = 1; | |
930a9140 | 2502 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2503 | } |
173f2a64 | 2504 | } |
3bd13e92 KH |
2505 | /* Test for intersecting intervals. This does the right thing |
2506 | for both insertion and deletion. */ | |
2507 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2508 | { |
2509 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2510 | if (!NILP (prop)) |
2511 | { | |
55b48893 RS |
2512 | if (!tail_copied) |
2513 | tail = Fcopy_sequence (tail); | |
2514 | tail_copied = 1; | |
930a9140 | 2515 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2516 | } |
173f2a64 RS |
2517 | } |
2518 | } | |
2519 | ||
55b48893 | 2520 | tail_copied = 0; |
173f2a64 RS |
2521 | for (tail = current_buffer->overlays_after; |
2522 | CONSP (tail); | |
2523 | tail = XCONS (tail)->cdr) | |
2524 | { | |
2525 | int startpos, endpos; | |
be8b1c6b | 2526 | Lisp_Object ostart, oend; |
173f2a64 RS |
2527 | |
2528 | overlay = XCONS (tail)->car; | |
2529 | ||
2530 | ostart = OVERLAY_START (overlay); | |
2531 | oend = OVERLAY_END (overlay); | |
2532 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 2533 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
2534 | if (XFASTINT (end) < startpos) |
2535 | break; | |
2536 | if (XFASTINT (end) == startpos && insertion) | |
2537 | { | |
2538 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
2539 | if (!NILP (prop)) |
2540 | { | |
55b48893 RS |
2541 | if (!tail_copied) |
2542 | tail = Fcopy_sequence (tail); | |
2543 | tail_copied = 1; | |
930a9140 | 2544 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2545 | } |
173f2a64 RS |
2546 | } |
2547 | if (XFASTINT (start) == endpos && insertion) | |
2548 | { | |
2549 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
2550 | if (!NILP (prop)) |
2551 | { | |
55b48893 RS |
2552 | if (!tail_copied) |
2553 | tail = Fcopy_sequence (tail); | |
2554 | tail_copied = 1; | |
930a9140 | 2555 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2556 | } |
173f2a64 | 2557 | } |
3bd13e92 KH |
2558 | /* Test for intersecting intervals. This does the right thing |
2559 | for both insertion and deletion. */ | |
2560 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
2561 | { |
2562 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
2563 | if (!NILP (prop)) |
2564 | { | |
55b48893 RS |
2565 | if (!tail_copied) |
2566 | tail = Fcopy_sequence (tail); | |
2567 | tail_copied = 1; | |
930a9140 | 2568 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 2569 | } |
173f2a64 RS |
2570 | } |
2571 | } | |
55b48893 RS |
2572 | |
2573 | UNGCPRO; | |
173f2a64 RS |
2574 | } |
2575 | ||
2576 | static void | |
930a9140 RS |
2577 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
2578 | Lisp_Object list, overlay; | |
2579 | int after; | |
2580 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 2581 | { |
930a9140 RS |
2582 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
2583 | GCPRO4 (list, arg1, arg2, arg3); | |
173f2a64 RS |
2584 | while (!NILP (list)) |
2585 | { | |
930a9140 RS |
2586 | if (NILP (arg3)) |
2587 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
2588 | else | |
2589 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
2590 | list = Fcdr (list); |
2591 | } | |
2592 | UNGCPRO; | |
2593 | } | |
9d7608b7 KH |
2594 | |
2595 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
2596 | property is set. */ | |
2597 | void | |
2598 | evaporate_overlays (pos) | |
2599 | int pos; | |
2600 | { | |
2601 | Lisp_Object tail, overlay, hit_list; | |
2602 | ||
2603 | hit_list = Qnil; | |
2604 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
2605 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
2606 | tail = XCONS (tail)->cdr) | |
2607 | { | |
2608 | int endpos; | |
2609 | overlay = XCONS (tail)->car; | |
2610 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2611 | if (endpos < pos) | |
2612 | break; | |
2613 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
2614 | && Foverlay_get (overlay, Qevaporate)) | |
2615 | hit_list = Fcons (overlay, hit_list); | |
2616 | } | |
2617 | else | |
2618 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
2619 | tail = XCONS (tail)->cdr) | |
2620 | { | |
2621 | int startpos; | |
889bf329 | 2622 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
2623 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2624 | if (startpos > pos) | |
2625 | break; | |
2626 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
2627 | && Foverlay_get (overlay, Qevaporate)) | |
2628 | hit_list = Fcons (overlay, hit_list); | |
2629 | } | |
2630 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
2631 | Fdelete_overlay (XCONS (hit_list)->car); | |
2632 | } | |
173f2a64 | 2633 | \f |
54dfdeb0 KH |
2634 | /* Somebody has tried to store a value with an unacceptable type |
2635 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 2636 | void |
54dfdeb0 KH |
2637 | buffer_slot_type_mismatch (offset) |
2638 | int offset; | |
0fa3ba92 | 2639 | { |
54dfdeb0 | 2640 | Lisp_Object sym; |
0fa3ba92 | 2641 | char *type_name; |
54dfdeb0 | 2642 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
2643 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
2644 | { | |
2645 | case Lisp_Int: type_name = "integers"; break; | |
2646 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 2647 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
2648 | default: |
2649 | abort (); | |
2650 | } | |
2651 | ||
2652 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 2653 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
2654 | } |
2655 | \f | |
1ab256cb RM |
2656 | init_buffer_once () |
2657 | { | |
2658 | register Lisp_Object tem; | |
2659 | ||
2660 | /* Make sure all markable slots in buffer_defaults | |
2661 | are initialized reasonably, so mark_buffer won't choke. */ | |
2662 | reset_buffer (&buffer_defaults); | |
bcd40520 | 2663 | reset_buffer_local_variables (&buffer_defaults); |
1ab256cb | 2664 | reset_buffer (&buffer_local_symbols); |
bcd40520 | 2665 | reset_buffer_local_variables (&buffer_local_symbols); |
336cd056 RS |
2666 | /* Prevent GC from getting confused. */ |
2667 | buffer_defaults.text = &buffer_defaults.own_text; | |
2668 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
2669 | #ifdef USE_TEXT_PROPERTIES | |
2670 | BUF_INTERVALS (&buffer_defaults) = 0; | |
2671 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
2672 | #endif | |
67180c6a KH |
2673 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
2674 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
2675 | |
2676 | /* Set up the default values of various buffer slots. */ | |
2677 | /* Must do these before making the first buffer! */ | |
2678 | ||
2679 | /* real setup is done in loaddefs.el */ | |
2680 | buffer_defaults.mode_line_format = build_string ("%-"); | |
2681 | buffer_defaults.abbrev_mode = Qnil; | |
2682 | buffer_defaults.overwrite_mode = Qnil; | |
2683 | buffer_defaults.case_fold_search = Qt; | |
2684 | buffer_defaults.auto_fill_function = Qnil; | |
2685 | buffer_defaults.selective_display = Qnil; | |
2686 | #ifndef old | |
2687 | buffer_defaults.selective_display_ellipses = Qt; | |
2688 | #endif | |
2689 | buffer_defaults.abbrev_table = Qnil; | |
2690 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 2691 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 2692 | buffer_defaults.mark_active = Qnil; |
2eec3b4e RS |
2693 | buffer_defaults.overlays_before = Qnil; |
2694 | buffer_defaults.overlays_after = Qnil; | |
8d7a4592 | 2695 | XSETFASTINT (buffer_defaults.overlay_center, 1); |
1ab256cb | 2696 | |
8d7a4592 | 2697 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
2698 | buffer_defaults.truncate_lines = Qnil; |
2699 | buffer_defaults.ctl_arrow = Qt; | |
2700 | ||
f7975d07 | 2701 | #ifdef DOS_NT |
0776cb1b | 2702 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 2703 | #endif |
8d7a4592 KH |
2704 | XSETFASTINT (buffer_defaults.fill_column, 70); |
2705 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 2706 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 2707 | buffer_defaults.file_truename = Qnil; |
1ab256cb RM |
2708 | |
2709 | /* Assign the local-flags to the slots that have default values. | |
2710 | The local flag is a bit that is used in the buffer | |
2711 | to say that it has its own local value for the slot. | |
2712 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
2713 | ||
2714 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 2715 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
2716 | |
2717 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
2718 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
2719 | XSETINT (buffer_local_flags.filename, -1); |
2720 | XSETINT (buffer_local_flags.directory, -1); | |
2721 | XSETINT (buffer_local_flags.backed_up, -1); | |
2722 | XSETINT (buffer_local_flags.save_length, -1); | |
2723 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
2724 | XSETINT (buffer_local_flags.read_only, -1); | |
2725 | XSETINT (buffer_local_flags.major_mode, -1); | |
2726 | XSETINT (buffer_local_flags.mode_name, -1); | |
2727 | XSETINT (buffer_local_flags.undo_list, -1); | |
2728 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 2729 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 2730 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 2731 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
8d7a4592 KH |
2732 | |
2733 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
2734 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
2735 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
2736 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
2737 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
2738 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 2739 | #ifndef old |
8d7a4592 | 2740 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 2741 | #endif |
8d7a4592 KH |
2742 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
2743 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
2744 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
2745 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
2746 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
2747 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
2748 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
2749 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); | |
28e969dd | 2750 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); |
f7975d07 | 2751 | #ifdef DOS_NT |
8d7a4592 | 2752 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
54ad07d3 | 2753 | #endif |
1ab256cb RM |
2754 | |
2755 | Vbuffer_alist = Qnil; | |
2756 | current_buffer = 0; | |
2757 | all_buffers = 0; | |
2758 | ||
2759 | QSFundamental = build_string ("Fundamental"); | |
2760 | ||
2761 | Qfundamental_mode = intern ("fundamental-mode"); | |
2762 | buffer_defaults.major_mode = Qfundamental_mode; | |
2763 | ||
2764 | Qmode_class = intern ("mode-class"); | |
2765 | ||
2766 | Qprotected_field = intern ("protected-field"); | |
2767 | ||
2768 | Qpermanent_local = intern ("permanent-local"); | |
2769 | ||
2770 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
2771 | ||
2772 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
2773 | /* super-magic invisible buffer */ | |
2774 | Vbuffer_alist = Qnil; | |
2775 | ||
ffd56f97 | 2776 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
2777 | } |
2778 | ||
2779 | init_buffer () | |
2780 | { | |
2781 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
2782 | char *pwd; |
2783 | struct stat dotstat, pwdstat; | |
136351b7 | 2784 | Lisp_Object temp; |
f7975d07 | 2785 | int rc; |
1ab256cb RM |
2786 | |
2787 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
2788 | |
2789 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
2790 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 2791 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
2792 | && stat (pwd, &pwdstat) == 0 |
2793 | && stat (".", &dotstat) == 0 | |
2794 | && dotstat.st_ino == pwdstat.st_ino | |
2795 | && dotstat.st_dev == pwdstat.st_dev | |
2796 | && strlen (pwd) < MAXPATHLEN) | |
2797 | strcpy (buf, pwd); | |
2798 | else if (getwd (buf) == 0) | |
cf1e6391 | 2799 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
2800 | |
2801 | #ifndef VMS | |
2802 | /* Maybe this should really use some standard subroutine | |
2803 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
2804 | rc = strlen (buf); |
2805 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
2806 | { | |
2807 | buf[rc] = DIRECTORY_SEP; | |
2808 | buf[rc + 1] = '\0'; | |
2809 | } | |
1ab256cb RM |
2810 | #endif /* not VMS */ |
2811 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
2812 | |
2813 | temp = get_minibuffer (0); | |
2814 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
2815 | } |
2816 | ||
2817 | /* initialize the buffer routines */ | |
2818 | syms_of_buffer () | |
2819 | { | |
188d4d11 RM |
2820 | extern Lisp_Object Qdisabled; |
2821 | ||
1ab256cb RM |
2822 | staticpro (&Vbuffer_defaults); |
2823 | staticpro (&Vbuffer_local_symbols); | |
2824 | staticpro (&Qfundamental_mode); | |
2825 | staticpro (&Qmode_class); | |
2826 | staticpro (&QSFundamental); | |
2827 | staticpro (&Vbuffer_alist); | |
2828 | staticpro (&Qprotected_field); | |
2829 | staticpro (&Qpermanent_local); | |
2830 | staticpro (&Qkill_buffer_hook); | |
52f8ec73 | 2831 | staticpro (&Qoverlayp); |
9d7608b7 KH |
2832 | Qevaporate = intern ("evaporate"); |
2833 | staticpro (&Qevaporate); | |
294d215f RS |
2834 | staticpro (&Qmodification_hooks); |
2835 | Qmodification_hooks = intern ("modification-hooks"); | |
2836 | staticpro (&Qinsert_in_front_hooks); | |
2837 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); | |
2838 | staticpro (&Qinsert_behind_hooks); | |
2839 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); | |
5fe0b67e RS |
2840 | staticpro (&Qget_file_buffer); |
2841 | Qget_file_buffer = intern ("get-file-buffer"); | |
5985d248 KH |
2842 | Qpriority = intern ("priority"); |
2843 | staticpro (&Qpriority); | |
2844 | Qwindow = intern ("window"); | |
2845 | staticpro (&Qwindow); | |
52f8ec73 JB |
2846 | |
2847 | Qoverlayp = intern ("overlayp"); | |
1ab256cb RM |
2848 | |
2849 | Fput (Qprotected_field, Qerror_conditions, | |
2850 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
2851 | Fput (Qprotected_field, Qerror_message, | |
2852 | build_string ("Attempt to modify a protected field")); | |
2853 | ||
2854 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
2855 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
2856 | ||
2857 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
2858 | &buffer_defaults.mode_line_format, | |
2859 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
2860 | This is the same as (default-value 'mode-line-format)."); | |
2861 | ||
2862 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
2863 | &buffer_defaults.abbrev_mode, | |
2864 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
2865 | This is the same as (default-value 'abbrev-mode)."); | |
2866 | ||
2867 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
2868 | &buffer_defaults.ctl_arrow, | |
2869 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
2870 | This is the same as (default-value 'ctl-arrow)."); | |
2871 | ||
2872 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
2873 | &buffer_defaults.truncate_lines, | |
2874 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
2875 | This is the same as (default-value 'truncate-lines)."); | |
2876 | ||
2877 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
2878 | &buffer_defaults.fill_column, | |
2879 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
2880 | This is the same as (default-value 'fill-column)."); | |
2881 | ||
2882 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
2883 | &buffer_defaults.left_margin, | |
2884 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
2885 | This is the same as (default-value 'left-margin)."); | |
2886 | ||
2887 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
2888 | &buffer_defaults.tab_width, | |
2889 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
2890 | This is the same as (default-value 'tab-width)."); | |
2891 | ||
2892 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
2893 | &buffer_defaults.case_fold_search, | |
2894 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
2895 | This is the same as (default-value 'case-fold-search)."); | |
2896 | ||
f7975d07 | 2897 | #ifdef DOS_NT |
54ad07d3 RS |
2898 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
2899 | &buffer_defaults.buffer_file_type, | |
2900 | "Default file type for buffers that do not override it.\n\ | |
2901 | This is the same as (default-value 'buffer-file-type).\n\ | |
2902 | The file type is nil for text, t for binary."); | |
2903 | #endif | |
2904 | ||
0fa3ba92 JB |
2905 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
2906 | Qnil, 0); | |
1ab256cb RM |
2907 | |
2908 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
2909 | But make-docfile finds it! | |
2910 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 2911 | Qnil, |
1ab256cb RM |
2912 | "Template for displaying mode line for current buffer.\n\ |
2913 | Each buffer has its own value of this variable.\n\ | |
2914 | Value may be a string, a symbol or a list or cons cell.\n\ | |
2915 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
2916 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
2917 | in that the %-constructs below are not recognized.\n\ | |
2918 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
2919 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
2920 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
2921 | For a list whose car is a string or list, each element is processed\n\ | |
2922 | recursively and the results are effectively concatenated.\n\ | |
2923 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
2924 | and padded (if the number is positive) or truncated (if negative)\n\ | |
2925 | to the width specified by that number.\n\ | |
2926 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
2927 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
2928 | or when it is found in a cons-cell or a list)\n\ | |
2929 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
2930 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
2931 | % means buffer is read-only and * means it is modified.\n\ | |
2932 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 2933 | %s -- print process status. %l -- print the current line number.\n\ |
dd24e6a6 | 2934 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 2935 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 2936 | or print Bottom or All.\n\ |
1ab256cb | 2937 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 2938 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
2939 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
2940 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
2941 | Decimal digits after the % specify field width to which to pad."); | |
2942 | */ | |
2943 | ||
2944 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
2945 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
2946 | nil here means use current buffer's major mode."); | |
2947 | ||
2948 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 2949 | make_number (Lisp_Symbol), |
1ab256cb RM |
2950 | "Symbol for current buffer's major mode."); |
2951 | ||
2952 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 2953 | make_number (Lisp_String), |
1ab256cb RM |
2954 | "Pretty name of current buffer's major mode (a string)."); |
2955 | ||
0fa3ba92 | 2956 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
2957 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
2958 | Automatically becomes buffer-local when set in any fashion."); | |
2959 | ||
2960 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 2961 | Qnil, |
1ab256cb RM |
2962 | "*Non-nil if searches should ignore case.\n\ |
2963 | Automatically becomes buffer-local when set in any fashion."); | |
2964 | ||
2965 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 2966 | make_number (Lisp_Int), |
1ab256cb RM |
2967 | "*Column beyond which automatic line-wrapping should happen.\n\ |
2968 | Automatically becomes buffer-local when set in any fashion."); | |
2969 | ||
2970 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 2971 | make_number (Lisp_Int), |
1ab256cb RM |
2972 | "*Column for the default indent-line-function to indent to.\n\ |
2973 | Linefeed indents to this column in Fundamental mode.\n\ | |
2974 | Automatically becomes buffer-local when set in any fashion."); | |
2975 | ||
2976 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 2977 | make_number (Lisp_Int), |
1ab256cb RM |
2978 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
2979 | Automatically becomes buffer-local when set in any fashion."); | |
2980 | ||
0fa3ba92 | 2981 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
2982 | "*Non-nil means display control chars with uparrow.\n\ |
2983 | Nil means use backslash and octal digits.\n\ | |
2984 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2985 | This variable does not apply to characters whose display is specified\n\ | |
2986 | in the current display table (if there is one)."); | |
2987 | ||
0fa3ba92 | 2988 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
2989 | "*Non-nil means do not display continuation lines;\n\ |
2990 | give each line of text one screen line.\n\ | |
2991 | Automatically becomes buffer-local when set in any fashion.\n\ | |
2992 | \n\ | |
2993 | Note that this is overridden by the variable\n\ | |
2994 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 2995 | and this buffer is not full-frame width."); |
1ab256cb | 2996 | |
f7975d07 | 2997 | #ifdef DOS_NT |
54ad07d3 RS |
2998 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
2999 | Qnil, | |
006d3d34 RS |
3000 | "Non-nil if the visited file is a binary file.\n\ |
3001 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
3002 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 3003 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
3004 | #endif |
3005 | ||
1ab256cb | 3006 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 3007 | make_number (Lisp_String), |
1ab256cb RM |
3008 | "Name of default directory of current buffer. Should end with slash.\n\ |
3009 | Each buffer has its own value of this variable."); | |
3010 | ||
3011 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3012 | Qnil, |
1ab256cb RM |
3013 | "Function called (if non-nil) to perform auto-fill.\n\ |
3014 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ | |
3015 | Each buffer has its own value of this variable.\n\ | |
3016 | NOTE: This variable is not an ordinary hook;\n\ | |
3017 | It may not be a list of functions."); | |
3018 | ||
3019 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3020 | make_number (Lisp_String), |
1ab256cb RM |
3021 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3022 | Each buffer has its own value of this variable."); | |
3023 | ||
f6ed2e84 RS |
3024 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
3025 | make_number (Lisp_String), | |
3026 | "Truename of file visited in current buffer, or nil if not visiting a file.\n\ | |
3027 | The truename of a file is calculated by `file-truename'.\n\ | |
3028 | Each buffer has its own value of this variable."); | |
3029 | ||
1ab256cb | 3030 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 3031 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3032 | make_number (Lisp_String), |
1ab256cb RM |
3033 | "Name of file for auto-saving current buffer,\n\ |
3034 | or nil if buffer should not be auto-saved.\n\ | |
3035 | Each buffer has its own value of this variable."); | |
3036 | ||
0fa3ba92 | 3037 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3038 | "Non-nil if this buffer is read-only.\n\ |
3039 | Each buffer has its own value of this variable."); | |
3040 | ||
0fa3ba92 | 3041 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
3042 | "Non-nil if this buffer's file has been backed up.\n\ |
3043 | Backing up is done before the first time the file is saved.\n\ | |
3044 | Each buffer has its own value of this variable."); | |
3045 | ||
3046 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 3047 | make_number (Lisp_Int), |
1ab256cb RM |
3048 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
3049 | 0 initially.\n\ | |
3050 | Each buffer has its own value of this variable."); | |
3051 | ||
3052 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 3053 | Qnil, |
1ab256cb RM |
3054 | "Non-nil enables selective display:\n\ |
3055 | Integer N as value means display only lines\n\ | |
3056 | that start with less than n columns of space.\n\ | |
3057 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
3058 | Then ^M's in the file are written into files as newlines.\n\n\ | |
3059 | Automatically becomes buffer-local when set in any fashion."); | |
3060 | ||
3061 | #ifndef old | |
3062 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
3063 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 3064 | Qnil, |
1ab256cb RM |
3065 | "t means display ... on previous line when a line is invisible.\n\ |
3066 | Automatically becomes buffer-local when set in any fashion."); | |
3067 | #endif | |
3068 | ||
0fa3ba92 | 3069 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 3070 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
3071 | The value should be one of `overwrite-mode-textual',\n\ |
3072 | `overwrite-mode-binary', or nil.\n\ | |
3073 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 3074 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 3075 | until the tab is filled in.\n\ |
6bbb0d4a | 3076 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
3077 | Automatically becomes buffer-local when set in any fashion."); |
3078 | ||
54939090 RS |
3079 | #if 0 /* The doc string is too long for some compilers, |
3080 | but make-docfile can find it in this comment. */ | |
1ab256cb | 3081 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 3082 | Qnil, |
1ab256cb RM |
3083 | "Display table that controls display of the contents of current buffer.\n\ |
3084 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3085 | The display table is a vector created with `make-display-table'.\n\ | |
3086 | The first 256 elements control how to display each possible text character.\n\ | |
6158b3b0 | 3087 | Each value should be a vector of characters or nil;\n\ |
1ab256cb | 3088 | nil means display the character in the default fashion.\n\ |
a45e35e1 | 3089 | The remaining six elements control the display of\n\ |
6158b3b0 JB |
3090 | the end of a truncated screen line (element 256, a single character);\n\ |
3091 | the end of a continued line (element 257, a single character);\n\ | |
3092 | the escape character used to display character codes in octal\n\ | |
3093 | (element 258, a single character);\n\ | |
3094 | the character used as an arrow for control characters (element 259,\n\ | |
3095 | a single character);\n\ | |
3096 | the decoration indicating the presence of invisible lines (element 260,\n\ | |
a45e35e1 JB |
3097 | a vector of characters);\n\ |
3098 | the character used to draw the border between side-by-side windows\n\ | |
3402827c | 3099 | (element 261, a single character).\n\ |
1ab256cb RM |
3100 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
3101 | Each window can have its own, overriding display table."); | |
54939090 RS |
3102 | #endif |
3103 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 3104 | Qnil, 0); |
1ab256cb | 3105 | |
1ab256cb RM |
3106 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
3107 | "Don't ask."); | |
3108 | */ | |
01050cb5 | 3109 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
3110 | "Function to call before each text change.\n\ |
3111 | Two arguments are passed to the function: the positions of\n\ | |
3112 | the beginning and end of the range of old text to be changed.\n\ | |
3113 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3114 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 3115 | \n\ |
5f079267 | 3116 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
3117 | don't call any before-change or after-change functions.\n\ |
3118 | That's because these variables are temporarily set to nil.\n\ | |
3119 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3120 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3121 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3122 | Vbefore_change_function = Qnil; |
3123 | ||
3124 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
3125 | "Function to call after each text change.\n\ | |
3126 | Three arguments are passed to the function: the positions of\n\ | |
3127 | the beginning and end of the range of changed text,\n\ | |
3128 | and the length of the pre-change text replaced by that range.\n\ | |
3129 | \(For an insertion, the pre-change length is zero;\n\ | |
3130 | for a deletion, that length is the number of characters deleted,\n\ | |
3131 | and the post-change beginning and end are at the same place.)\n\ | |
3132 | \n\ | |
5f079267 | 3133 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
3134 | don't call any before-change or after-change functions.\n\ |
3135 | That's because these variables are temporarily set to nil.\n\ | |
3136 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3137 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3138 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3139 | Vafter_change_function = Qnil; |
3140 | ||
5f079267 RS |
3141 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
3142 | "List of functions to call before each text change.\n\ | |
3143 | Two arguments are passed to each function: the positions of\n\ | |
3144 | the beginning and end of the range of old text to be changed.\n\ | |
3145 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3146 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
3147 | \n\ |
3148 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
3149 | don't call any before-change or after-change functions.\n\ |
3150 | That's because these variables are temporarily set to nil.\n\ | |
3151 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3152 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3153 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
3154 | Vbefore_change_functions = Qnil; |
3155 | ||
3156 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
3157 | "List of function to call after each text change.\n\ | |
3158 | Three arguments are passed to each function: the positions of\n\ | |
3159 | the beginning and end of the range of changed text,\n\ | |
3160 | and the length of the pre-change text replaced by that range.\n\ | |
3161 | \(For an insertion, the pre-change length is zero;\n\ | |
3162 | for a deletion, that length is the number of characters deleted,\n\ | |
3163 | and the post-change beginning and end are at the same place.)\n\ | |
3164 | \n\ | |
3165 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
3166 | don't call any before-change or after-change functions.\n\ |
3167 | That's because these variables are temporarily set to nil.\n\ | |
3168 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3169 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3170 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 3171 | |
5f079267 RS |
3172 | Vafter_change_functions = Qnil; |
3173 | ||
dbc4e1c1 JB |
3174 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
3175 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
3176 | The functions are run using the `run-hooks' function."); | |
3177 | Vfirst_change_hook = Qnil; | |
3178 | Qfirst_change_hook = intern ("first-change-hook"); | |
3179 | staticpro (&Qfirst_change_hook); | |
1ab256cb | 3180 | |
54939090 RS |
3181 | #if 0 /* The doc string is too long for some compilers, |
3182 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 3183 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
3184 | "List of undo entries in current buffer.\n\ |
3185 | Recent changes come first; older changes follow newer.\n\ | |
3186 | \n\ | |
3187 | An entry (START . END) represents an insertion which begins at\n\ | |
3188 | position START and ends at position END.\n\ | |
3189 | \n\ | |
3190 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
3191 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
3192 | of the text being deleted; if negative, point was at the end.\n\ | |
3193 | \n\ | |
6c0df54a RS |
3194 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
3195 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
3196 | of the visited file's modification time, as of that time. If the\n\ | |
3197 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
3198 | obsolete.\n\ |
3199 | \n\ | |
6c0df54a RS |
3200 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
3201 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
3202 | and VALUE is the old value.\n\ | |
483c1fd3 | 3203 | \n\ |
bec44fd6 JB |
3204 | An entry of the form POSITION indicates that point was at the buffer\n\ |
3205 | location given by the integer. Undoing an entry of this form places\n\ | |
3206 | point at POSITION.\n\ | |
3207 | \n\ | |
1ab256cb RM |
3208 | nil marks undo boundaries. The undo command treats the changes\n\ |
3209 | between two undo boundaries as a single step to be undone.\n\ | |
3210 | \n\ | |
bec44fd6 | 3211 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
3212 | #endif |
3213 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 3214 | 0); |
1ab256cb | 3215 | |
c48f61ef RS |
3216 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
3217 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
3218 | Automatically local in all buffers."); | |
3219 | ||
28e969dd | 3220 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
3221 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
3222 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 3223 | \n\ |
f0c5b712 JB |
3224 | Normally, the line-motion functions work by scanning the buffer for\n\ |
3225 | newlines. Columnar operations (like move-to-column and\n\ | |
3226 | compute-motion) also work by scanning the buffer, summing character\n\ | |
3227 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 3228 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
3229 | motion functions will take longer to execute. Emacs may also take\n\ |
3230 | longer to update the display.\n\ | |
28e969dd | 3231 | \n\ |
f0c5b712 JB |
3232 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
3233 | results of their scans, and consult the cache to avoid rescanning\n\ | |
3234 | regions of the buffer until the text is modified. The caches are most\n\ | |
3235 | beneficial when they prevent the most searching---that is, when the\n\ | |
3236 | buffer contains long lines and large regions of characters with the\n\ | |
3237 | same, fixed screen width.\n\ | |
28e969dd | 3238 | \n\ |
f0c5b712 JB |
3239 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
3240 | become slightly slower (because of the overhead of consulting the\n\ | |
3241 | cache), and the caches will use memory roughly proportional to the\n\ | |
3242 | number of newlines and characters whose screen width varies.\n\ | |
3243 | \n\ | |
3244 | The caches require no explicit maintenance; their accuracy is\n\ | |
3245 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
3246 | the cache should not affect the behavior of any of the motion\n\ | |
3247 | functions; it should only affect their performance."); | |
28e969dd | 3248 | |
943e065b RS |
3249 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3250 | "Value of point before the last series of scroll operations, or nil."); | |
3251 | ||
3cb719bd RS |
3252 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
3253 | ¤t_buffer->invisibility_spec, Qnil, | |
3254 | "Invisibility spec of this buffer.\n\ | |
3255 | The default is t, which means that text is invisible\n\ | |
3256 | if it has a non-nil `invisible' property.\n\ | |
3257 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
3258 | property is an element in that list.\n\ | |
3259 | If an element is a cons cell of the for (PROP . ELLIPSIS),\n\ | |
3260 | then characters with property value PROP is invisible,\n\ | |
3261 | and they have an ellipsis as well if ELLIPSIS is non-nil."); | |
3262 | ||
c48f61ef RS |
3263 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
3264 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
3265 | Vtransient_mark_mode = Qnil; | |
3266 | ||
0a4469c9 | 3267 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
3268 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
3269 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
3270 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
3271 | and disregard a `read-only' text property if the property value\n\ | |
3272 | is a member of the list."); | |
3273 | Vinhibit_read_only = Qnil; | |
3274 | ||
dcdffbf6 RS |
3275 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
3276 | "List of functions called with no args to query before killing a buffer."); | |
3277 | Vkill_buffer_query_functions = Qnil; | |
3278 | ||
1ab256cb RM |
3279 | defsubr (&Sbuffer_list); |
3280 | defsubr (&Sget_buffer); | |
3281 | defsubr (&Sget_file_buffer); | |
3282 | defsubr (&Sget_buffer_create); | |
336cd056 | 3283 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 3284 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
3285 | defsubr (&Sbuffer_name); |
3286 | /*defsubr (&Sbuffer_number);*/ | |
3287 | defsubr (&Sbuffer_file_name); | |
336cd056 | 3288 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
3289 | defsubr (&Sbuffer_local_variables); |
3290 | defsubr (&Sbuffer_modified_p); | |
3291 | defsubr (&Sset_buffer_modified_p); | |
3292 | defsubr (&Sbuffer_modified_tick); | |
3293 | defsubr (&Srename_buffer); | |
3294 | defsubr (&Sother_buffer); | |
3295 | defsubr (&Sbuffer_disable_undo); | |
3296 | defsubr (&Sbuffer_enable_undo); | |
3297 | defsubr (&Skill_buffer); | |
3298 | defsubr (&Serase_buffer); | |
a9ee7a59 | 3299 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
3300 | defsubr (&Sswitch_to_buffer); |
3301 | defsubr (&Spop_to_buffer); | |
3302 | defsubr (&Scurrent_buffer); | |
3303 | defsubr (&Sset_buffer); | |
3304 | defsubr (&Sbarf_if_buffer_read_only); | |
3305 | defsubr (&Sbury_buffer); | |
1ab256cb | 3306 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 3307 | |
52f8ec73 | 3308 | defsubr (&Soverlayp); |
2eec3b4e RS |
3309 | defsubr (&Smake_overlay); |
3310 | defsubr (&Sdelete_overlay); | |
3311 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
3312 | defsubr (&Soverlay_start); |
3313 | defsubr (&Soverlay_end); | |
3314 | defsubr (&Soverlay_buffer); | |
3315 | defsubr (&Soverlay_properties); | |
2eec3b4e RS |
3316 | defsubr (&Soverlays_at); |
3317 | defsubr (&Snext_overlay_change); | |
239c932b | 3318 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
3319 | defsubr (&Soverlay_recenter); |
3320 | defsubr (&Soverlay_lists); | |
3321 | defsubr (&Soverlay_get); | |
3322 | defsubr (&Soverlay_put); | |
1ab256cb RM |
3323 | } |
3324 | ||
3325 | keys_of_buffer () | |
3326 | { | |
3327 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
3328 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
3329 | |
3330 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
3331 | initialized when that function gets called. */ | |
3332 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 3333 | } |