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 | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
1ab256cb RM |
21 | |
22 | ||
2381d133 JB |
23 | #include <sys/types.h> |
24 | #include <sys/stat.h> | |
1ab256cb RM |
25 | #include <sys/param.h> |
26 | ||
27 | #ifndef MAXPATHLEN | |
28 | /* in 4.1, param.h fails to define this. */ | |
29 | #define MAXPATHLEN 1024 | |
30 | #endif /* not MAXPATHLEN */ | |
31 | ||
18160b98 | 32 | #include <config.h> |
1ab256cb | 33 | #include "lisp.h" |
21cf4cf8 | 34 | #include "intervals.h" |
1ab256cb RM |
35 | #include "window.h" |
36 | #include "commands.h" | |
37 | #include "buffer.h" | |
28e969dd | 38 | #include "region-cache.h" |
1ab256cb | 39 | #include "indent.h" |
d014bf88 | 40 | #include "blockinput.h" |
1ab256cb RM |
41 | |
42 | struct buffer *current_buffer; /* the current buffer */ | |
43 | ||
44 | /* First buffer in chain of all buffers (in reverse order of creation). | |
45 | Threaded through ->next. */ | |
46 | ||
47 | struct buffer *all_buffers; | |
48 | ||
49 | /* This structure holds the default values of the buffer-local variables | |
50 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
51 | The default value occupies the same slot in this structure | |
52 | as an individual buffer's value occupies in that buffer. | |
53 | Setting the default value also goes through the alist of buffers | |
54 | and stores into each buffer that does not say it has a local value. */ | |
55 | ||
56 | struct buffer buffer_defaults; | |
57 | ||
58 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
59 | ||
60 | static Lisp_Object Vbuffer_defaults; | |
61 | ||
62 | /* This structure marks which slots in a buffer have corresponding | |
63 | default values in buffer_defaults. | |
64 | Each such slot has a nonzero value in this structure. | |
65 | The value has only one nonzero bit. | |
66 | ||
67 | When a buffer has its own local value for a slot, | |
68 | the bit for that slot (found in the same slot in this structure) | |
69 | is turned on in the buffer's local_var_flags slot. | |
70 | ||
71 | If a slot in this structure is -1, then even though there may | |
72 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
73 | and the corresponding slot in buffer_defaults is not used. | |
74 | ||
75 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
76 | but there is a default value which is copied into each buffer. | |
77 | ||
78 | If a slot in this structure is negative, then even though there may | |
79 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
80 | and the corresponding slot in buffer_defaults is not used. | |
81 | ||
82 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
83 | zero, that is a bug */ | |
84 | ||
85 | struct buffer buffer_local_flags; | |
86 | ||
87 | /* This structure holds the names of symbols whose values may be | |
88 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
89 | ||
90 | struct buffer buffer_local_symbols; | |
91 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
92 | static Lisp_Object Vbuffer_local_symbols; | |
93 | ||
0fa3ba92 JB |
94 | /* This structure holds the required types for the values in the |
95 | buffer-local slots. If a slot contains Qnil, then the | |
96 | corresponding buffer slot may contain a value of any type. If a | |
97 | slot contains an integer, then prospective values' tags must be | |
98 | equal to that integer. When a tag does not match, the function | |
99 | buffer_slot_type_mismatch will signal an error. */ | |
100 | struct buffer buffer_local_types; | |
101 | ||
13de9290 RS |
102 | /* Flags indicating which built-in buffer-local variables |
103 | are permanent locals. */ | |
104 | static int buffer_permanent_local_flags; | |
105 | ||
1ab256cb | 106 | Lisp_Object Fset_buffer (); |
01050cb5 | 107 | void set_buffer_internal (); |
c7aa5005 | 108 | void set_buffer_internal_1 (); |
173f2a64 | 109 | static void call_overlay_mod_hooks (); |
2f3f993b | 110 | static void swap_out_buffer_local_variables (); |
13de9290 | 111 | static void reset_buffer_local_variables (); |
1ab256cb RM |
112 | |
113 | /* Alist of all buffer names vs the buffers. */ | |
114 | /* This used to be a variable, but is no longer, | |
115 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
116 | Lisp_Object Vbuffer_alist; | |
117 | ||
118 | /* Functions to call before and after each text change. */ | |
119 | Lisp_Object Vbefore_change_function; | |
120 | Lisp_Object Vafter_change_function; | |
5f079267 RS |
121 | Lisp_Object Vbefore_change_functions; |
122 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 123 | |
c48f61ef RS |
124 | Lisp_Object Vtransient_mark_mode; |
125 | ||
a96b68f1 RS |
126 | /* t means ignore all read-only text properties. |
127 | A list means ignore such a property if its value is a member of the list. | |
128 | Any non-nil value means ignore buffer-read-only. */ | |
129 | Lisp_Object Vinhibit_read_only; | |
130 | ||
dcdffbf6 RS |
131 | /* List of functions to call that can query about killing a buffer. |
132 | If any of these functions returns nil, we don't kill it. */ | |
133 | Lisp_Object Vkill_buffer_query_functions; | |
134 | ||
dbc4e1c1 JB |
135 | /* List of functions to call before changing an unmodified buffer. */ |
136 | Lisp_Object Vfirst_change_hook; | |
22378665 | 137 | |
dbc4e1c1 | 138 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
139 | Lisp_Object Qbefore_change_functions; |
140 | Lisp_Object Qafter_change_functions; | |
1ab256cb RM |
141 | |
142 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
143 | ||
144 | Lisp_Object Qprotected_field; | |
145 | ||
146 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
147 | ||
148 | Lisp_Object Qkill_buffer_hook; | |
149 | ||
5fe0b67e RS |
150 | Lisp_Object Qget_file_buffer; |
151 | ||
52f8ec73 JB |
152 | Lisp_Object Qoverlayp; |
153 | ||
bbbe9545 | 154 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 155 | |
294d215f RS |
156 | Lisp_Object Qmodification_hooks; |
157 | Lisp_Object Qinsert_in_front_hooks; | |
158 | Lisp_Object Qinsert_behind_hooks; | |
159 | ||
1ab256cb RM |
160 | /* For debugging; temporary. See set_buffer_internal. */ |
161 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
162 | ||
163 | nsberror (spec) | |
164 | Lisp_Object spec; | |
165 | { | |
a7a60ce9 | 166 | if (STRINGP (spec)) |
1ab256cb RM |
167 | error ("No buffer named %s", XSTRING (spec)->data); |
168 | error ("Invalid buffer argument"); | |
169 | } | |
170 | \f | |
0dc88e60 RS |
171 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
172 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ | |
173 | Value is nil if OBJECT is not a buffer or if it has been killed.") | |
174 | (object) | |
175 | Lisp_Object object; | |
176 | { | |
177 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
178 | ? Qt : Qnil); | |
179 | } | |
180 | ||
1ab256cb RM |
181 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, |
182 | "Return a list of all existing live buffers.") | |
183 | () | |
184 | { | |
185 | return Fmapcar (Qcdr, Vbuffer_alist); | |
186 | } | |
187 | ||
04ae1b48 RS |
188 | /* Like Fassoc, but use Fstring_equal to compare |
189 | (which ignores text properties), | |
190 | and don't ever QUIT. */ | |
191 | ||
192 | static Lisp_Object | |
193 | assoc_ignore_text_properties (key, list) | |
194 | register Lisp_Object key; | |
195 | Lisp_Object list; | |
196 | { | |
197 | register Lisp_Object tail; | |
198 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
199 | { | |
200 | register Lisp_Object elt, tem; | |
201 | elt = Fcar (tail); | |
202 | tem = Fstring_equal (Fcar (elt), key); | |
203 | if (!NILP (tem)) | |
204 | return elt; | |
205 | } | |
206 | return Qnil; | |
207 | } | |
208 | ||
1ab256cb RM |
209 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
210 | "Return the buffer named NAME (a string).\n\ | |
211 | If there is no live buffer named NAME, return nil.\n\ | |
212 | NAME may also be a buffer; if so, the value is that buffer.") | |
213 | (name) | |
214 | register Lisp_Object name; | |
215 | { | |
a7a60ce9 | 216 | if (BUFFERP (name)) |
1ab256cb RM |
217 | return name; |
218 | CHECK_STRING (name, 0); | |
219 | ||
04ae1b48 | 220 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
221 | } |
222 | ||
223 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
224 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 225 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
226 | If there is no such live buffer, return nil.\n\ |
227 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
228 | (filename) |
229 | register Lisp_Object filename; | |
230 | { | |
231 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
232 | Lisp_Object handler; |
233 | ||
1ab256cb RM |
234 | CHECK_STRING (filename, 0); |
235 | filename = Fexpand_file_name (filename, Qnil); | |
236 | ||
5fe0b67e RS |
237 | /* If the file name has special constructs in it, |
238 | call the corresponding file handler. */ | |
a617e913 | 239 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
240 | if (!NILP (handler)) |
241 | return call2 (handler, Qget_file_buffer, filename); | |
242 | ||
1ab256cb RM |
243 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
244 | { | |
245 | buf = Fcdr (XCONS (tail)->car); | |
a7a60ce9 KH |
246 | if (!BUFFERP (buf)) continue; |
247 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 248 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 249 | if (!NILP (tem)) |
1ab256cb RM |
250 | return buf; |
251 | } | |
252 | return Qnil; | |
253 | } | |
254 | ||
52e01189 RS |
255 | Lisp_Object |
256 | get_truename_buffer (filename) | |
257 | register Lisp_Object filename; | |
258 | { | |
259 | register Lisp_Object tail, buf, tem; | |
260 | ||
261 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
262 | { | |
263 | buf = Fcdr (XCONS (tail)->car); | |
264 | if (!BUFFERP (buf)) continue; | |
265 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
266 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
267 | if (!NILP (tem)) | |
268 | return buf; | |
269 | } | |
270 | return Qnil; | |
271 | } | |
272 | ||
1ab256cb RM |
273 | /* Incremented for each buffer created, to assign the buffer number. */ |
274 | int buffer_count; | |
275 | ||
276 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
277 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
278 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 279 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
280 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
281 | The value is never nil.") | |
282 | (name) | |
283 | register Lisp_Object name; | |
284 | { | |
a9ee7a59 | 285 | register Lisp_Object buf; |
1ab256cb RM |
286 | register struct buffer *b; |
287 | ||
288 | buf = Fget_buffer (name); | |
265a9e55 | 289 | if (!NILP (buf)) |
1ab256cb RM |
290 | return buf; |
291 | ||
31cd83e9 KH |
292 | if (XSTRING (name)->size == 0) |
293 | error ("Empty string for buffer name is not allowed"); | |
294 | ||
9ac0d9e0 | 295 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
1ab256cb | 296 | |
336cd056 RS |
297 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
298 | ||
299 | /* An ordinary buffer uses its own struct buffer_text. */ | |
300 | b->text = &b->own_text; | |
301 | b->base_buffer = 0; | |
302 | ||
1ab256cb | 303 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 304 | BLOCK_INPUT; |
1ab256cb | 305 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
9ac0d9e0 | 306 | UNBLOCK_INPUT; |
1ab256cb | 307 | if (! BUF_BEG_ADDR (b)) |
81841847 | 308 | buffer_memory_full (); |
1ab256cb RM |
309 | |
310 | BUF_PT (b) = 1; | |
311 | BUF_GPT (b) = 1; | |
312 | BUF_BEGV (b) = 1; | |
313 | BUF_ZV (b) = 1; | |
314 | BUF_Z (b) = 1; | |
315 | BUF_MODIFF (b) = 1; | |
2509d356 | 316 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
317 | BUF_SAVE_MODIFF (b) = 1; |
318 | BUF_INTERVALS (b) = 0; | |
1ab256cb | 319 | |
28e969dd JB |
320 | b->newline_cache = 0; |
321 | b->width_run_cache = 0; | |
322 | b->width_table = Qnil; | |
323 | ||
1ab256cb RM |
324 | /* Put this on the chain of all buffers including killed ones. */ |
325 | b->next = all_buffers; | |
326 | all_buffers = b; | |
327 | ||
336cd056 RS |
328 | /* An ordinary buffer normally doesn't need markers |
329 | to handle BEGV and ZV. */ | |
330 | b->pt_marker = Qnil; | |
331 | b->begv_marker = Qnil; | |
332 | b->zv_marker = Qnil; | |
04ae1b48 RS |
333 | |
334 | name = Fcopy_sequence (name); | |
335 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 336 | b->name = name; |
04ae1b48 | 337 | |
1ab256cb RM |
338 | if (XSTRING (name)->data[0] != ' ') |
339 | b->undo_list = Qnil; | |
340 | else | |
341 | b->undo_list = Qt; | |
342 | ||
343 | reset_buffer (b); | |
13de9290 | 344 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
345 | |
346 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 347 | XSETBUFFER (buf, b); |
1ab256cb RM |
348 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
349 | ||
350 | b->mark = Fmake_marker (); | |
336cd056 RS |
351 | BUF_MARKERS (b) = Qnil; |
352 | b->name = name; | |
353 | return buf; | |
354 | } | |
355 | ||
a2428fa2 | 356 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
193c3837 | 357 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
358 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
359 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
9e552710 RS |
360 | NAME should be a string which is not the name of an existing buffer.") |
361 | (base_buffer, name) | |
362 | register Lisp_Object base_buffer, name; | |
336cd056 RS |
363 | { |
364 | register Lisp_Object buf; | |
365 | register struct buffer *b; | |
366 | ||
367 | buf = Fget_buffer (name); | |
368 | if (!NILP (buf)) | |
369 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
370 | ||
371 | base_buffer = Fget_buffer (base_buffer); | |
372 | if (NILP (base_buffer)) | |
373 | error ("No such buffer: `%s'", | |
374 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
375 | ||
376 | if (XSTRING (name)->size == 0) | |
377 | error ("Empty string for buffer name is not allowed"); | |
378 | ||
379 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
380 | ||
381 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
382 | ||
383 | if (XBUFFER (base_buffer)->base_buffer) | |
384 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
385 | else | |
386 | b->base_buffer = XBUFFER (base_buffer); | |
387 | ||
388 | /* Use the base buffer's text object. */ | |
389 | b->text = b->base_buffer->text; | |
390 | ||
391 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
392 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
393 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
394 | ||
395 | b->newline_cache = 0; | |
396 | b->width_run_cache = 0; | |
397 | b->width_table = Qnil; | |
398 | ||
399 | /* Put this on the chain of all buffers including killed ones. */ | |
400 | b->next = all_buffers; | |
401 | all_buffers = b; | |
402 | ||
403 | name = Fcopy_sequence (name); | |
404 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
405 | b->name = name; | |
406 | ||
407 | reset_buffer (b); | |
13de9290 | 408 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
409 | |
410 | /* Put this in the alist of all live buffers. */ | |
411 | XSETBUFFER (buf, b); | |
412 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
413 | ||
414 | b->mark = Fmake_marker (); | |
1ab256cb | 415 | b->name = name; |
336cd056 RS |
416 | |
417 | /* Make sure the base buffer has markers for its narrowing. */ | |
418 | if (NILP (b->base_buffer->pt_marker)) | |
419 | { | |
420 | b->base_buffer->pt_marker = Fmake_marker (); | |
421 | Fset_marker (b->base_buffer->pt_marker, | |
422 | make_number (BUF_PT (b->base_buffer)), base_buffer); | |
423 | } | |
424 | if (NILP (b->base_buffer->begv_marker)) | |
425 | { | |
426 | b->base_buffer->begv_marker = Fmake_marker (); | |
427 | Fset_marker (b->base_buffer->begv_marker, | |
428 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); | |
429 | } | |
430 | if (NILP (b->base_buffer->zv_marker)) | |
431 | { | |
432 | b->base_buffer->zv_marker = Fmake_marker (); | |
433 | Fset_marker (b->base_buffer->zv_marker, | |
434 | make_number (BUF_ZV (b->base_buffer)), base_buffer); | |
26d84681 | 435 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
436 | } |
437 | ||
438 | /* Give the indirect buffer markers for its narrowing. */ | |
ea064aa0 RS |
439 | b->pt_marker = Fmake_marker (); |
440 | Fset_marker (b->pt_marker, make_number (BUF_PT (b)), buf); | |
441 | b->begv_marker = Fmake_marker (); | |
442 | Fset_marker (b->begv_marker, make_number (BUF_BEGV (b)), buf); | |
443 | b->zv_marker = Fmake_marker (); | |
444 | Fset_marker (b->zv_marker, make_number (BUF_ZV (b)), buf); | |
445 | ||
26d84681 | 446 | XMARKER (b->zv_marker)->insertion_type = 1; |
336cd056 | 447 | |
a9ee7a59 | 448 | return buf; |
1ab256cb RM |
449 | } |
450 | ||
bcd40520 RS |
451 | /* Reinitialize everything about a buffer except its name and contents |
452 | and local variables. */ | |
1ab256cb RM |
453 | |
454 | void | |
455 | reset_buffer (b) | |
456 | register struct buffer *b; | |
457 | { | |
458 | b->filename = Qnil; | |
f6ed2e84 | 459 | b->file_truename = Qnil; |
1ab256cb RM |
460 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
461 | b->modtime = 0; | |
8d7a4592 | 462 | XSETFASTINT (b->save_length, 0); |
1ab256cb RM |
463 | b->last_window_start = 1; |
464 | b->backed_up = Qnil; | |
465 | b->auto_save_modified = 0; | |
84f6bcba | 466 | b->auto_save_failure_time = -1; |
1ab256cb RM |
467 | b->auto_save_file_name = Qnil; |
468 | b->read_only = Qnil; | |
2eec3b4e RS |
469 | b->overlays_before = Qnil; |
470 | b->overlays_after = Qnil; | |
8d7a4592 | 471 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 472 | b->mark_active = Qnil; |
943e065b | 473 | b->point_before_scroll = Qnil; |
be9aafdd | 474 | b->file_format = Qnil; |
0dc6f165 | 475 | b->last_selected_window = Qnil; |
fb2030e3 RS |
476 | b->extra2 = Qnil; |
477 | b->extra3 = Qnil; | |
1ab256cb RM |
478 | } |
479 | ||
bcd40520 RS |
480 | /* Reset buffer B's local variables info. |
481 | Don't use this on a buffer that has already been in use; | |
482 | it does not treat permanent locals consistently. | |
13de9290 RS |
483 | Instead, use Fkill_all_local_variables. |
484 | ||
485 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
486 | buffer-local variables. If PERMANENT_TOO is 0, | |
487 | we preserve those. */ | |
bcd40520 | 488 | |
13de9290 RS |
489 | static void |
490 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 491 | register struct buffer *b; |
13de9290 | 492 | int permanent_too; |
1ab256cb RM |
493 | { |
494 | register int offset; | |
13de9290 RS |
495 | int dont_reset; |
496 | ||
497 | /* Decide which built-in local variables to reset. */ | |
498 | if (permanent_too) | |
499 | dont_reset = 0; | |
500 | else | |
501 | dont_reset = buffer_permanent_local_flags; | |
1ab256cb RM |
502 | |
503 | /* Reset the major mode to Fundamental, together with all the | |
504 | things that depend on the major mode. | |
505 | default-major-mode is handled at a higher level. | |
506 | We ignore it here. */ | |
507 | b->major_mode = Qfundamental_mode; | |
508 | b->keymap = Qnil; | |
509 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
510 | b->mode_name = QSFundamental; | |
511 | b->minor_modes = Qnil; | |
3446af9c RS |
512 | |
513 | /* If the standard case table has been altered and invalidated, | |
514 | fix up its insides first. */ | |
515 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
516 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
517 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
518 | Fset_standard_case_table (Vascii_downcase_table); | |
519 | ||
1ab256cb | 520 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
521 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
522 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
523 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 524 | b->invisibility_spec = Qt; |
2e716096 RS |
525 | #ifndef DOS_NT |
526 | b->buffer_file_type = Qnil; | |
527 | #endif | |
3cb719bd | 528 | |
1ab256cb RM |
529 | #if 0 |
530 | b->sort_table = XSTRING (Vascii_sort_table); | |
531 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
532 | #endif /* 0 */ | |
533 | ||
13de9290 | 534 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 535 | b->local_var_alist = Qnil; |
13de9290 | 536 | b->local_var_flags &= dont_reset; |
1ab256cb RM |
537 | |
538 | /* For each slot that has a default value, | |
539 | copy that into the slot. */ | |
540 | ||
541 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
542 | offset < sizeof (struct buffer); | |
4d2f1389 | 543 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
544 | { |
545 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
13de9290 RS |
546 | if ((flag > 0 |
547 | /* Don't reset a permanent local. */ | |
548 | && ! (dont_reset & flag)) | |
549 | || flag == -2) | |
550 | *(Lisp_Object *)(offset + (char *)b) | |
551 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
aab80822 | 552 | } |
1ab256cb RM |
553 | } |
554 | ||
01050cb5 RM |
555 | /* We split this away from generate-new-buffer, because rename-buffer |
556 | and set-visited-file-name ought to be able to use this to really | |
557 | rename the buffer properly. */ | |
558 | ||
559 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 560 | 1, 2, 0, |
01050cb5 RM |
561 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
562 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 563 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 564 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 565 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 566 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 567 | even if a buffer with that name exists.") |
c273e647 RS |
568 | (name, ignore) |
569 | register Lisp_Object name, ignore; | |
1ab256cb RM |
570 | { |
571 | register Lisp_Object gentemp, tem; | |
572 | int count; | |
573 | char number[10]; | |
574 | ||
575 | CHECK_STRING (name, 0); | |
576 | ||
577 | tem = Fget_buffer (name); | |
265a9e55 | 578 | if (NILP (tem)) |
01050cb5 | 579 | return name; |
1ab256cb RM |
580 | |
581 | count = 1; | |
582 | while (1) | |
583 | { | |
584 | sprintf (number, "<%d>", ++count); | |
585 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 586 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
587 | if (!NILP (tem)) |
588 | return gentemp; | |
1ab256cb | 589 | tem = Fget_buffer (gentemp); |
265a9e55 | 590 | if (NILP (tem)) |
01050cb5 | 591 | return gentemp; |
1ab256cb RM |
592 | } |
593 | } | |
594 | ||
595 | \f | |
596 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
597 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 598 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
599 | (buffer) |
600 | register Lisp_Object buffer; | |
601 | { | |
265a9e55 | 602 | if (NILP (buffer)) |
1ab256cb RM |
603 | return current_buffer->name; |
604 | CHECK_BUFFER (buffer, 0); | |
605 | return XBUFFER (buffer)->name; | |
606 | } | |
607 | ||
608 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
609 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
610 | No argument or nil as argument means use the current buffer.") | |
611 | (buffer) | |
612 | register Lisp_Object buffer; | |
613 | { | |
265a9e55 | 614 | if (NILP (buffer)) |
1ab256cb RM |
615 | return current_buffer->filename; |
616 | CHECK_BUFFER (buffer, 0); | |
617 | return XBUFFER (buffer)->filename; | |
618 | } | |
619 | ||
336cd056 RS |
620 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
621 | 0, 1, 0, | |
622 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
623 | If BUFFER is not indirect, return nil.") | |
624 | (buffer) | |
625 | register Lisp_Object buffer; | |
626 | { | |
627 | struct buffer *base; | |
628 | Lisp_Object base_buffer; | |
629 | ||
630 | if (NILP (buffer)) | |
631 | base = current_buffer->base_buffer; | |
632 | else | |
633 | { | |
634 | CHECK_BUFFER (buffer, 0); | |
635 | base = XBUFFER (buffer)->base_buffer; | |
636 | } | |
637 | ||
638 | if (! base) | |
639 | return Qnil; | |
640 | XSETBUFFER (base_buffer, base); | |
641 | return base_buffer; | |
642 | } | |
643 | ||
1ab256cb RM |
644 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
645 | Sbuffer_local_variables, 0, 1, 0, | |
646 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
647 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
648 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
649 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
650 | No argument or nil as argument means use current buffer as BUFFER.") | |
651 | (buffer) | |
652 | register Lisp_Object buffer; | |
653 | { | |
654 | register struct buffer *buf; | |
553defa4 | 655 | register Lisp_Object result; |
1ab256cb | 656 | |
265a9e55 | 657 | if (NILP (buffer)) |
1ab256cb RM |
658 | buf = current_buffer; |
659 | else | |
660 | { | |
661 | CHECK_BUFFER (buffer, 0); | |
662 | buf = XBUFFER (buffer); | |
663 | } | |
664 | ||
553defa4 RS |
665 | result = Qnil; |
666 | ||
1ab256cb | 667 | { |
553defa4 RS |
668 | register Lisp_Object tail; |
669 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 670 | { |
553defa4 RS |
671 | Lisp_Object val, elt; |
672 | ||
673 | elt = XCONS (tail)->car; | |
674 | ||
e0585c64 RS |
675 | /* Reference each variable in the alist in buf. |
676 | If inquiring about the current buffer, this gets the current values, | |
677 | so store them into the alist so the alist is up to date. | |
678 | If inquiring about some other buffer, this swaps out any values | |
679 | for that buffer, making the alist up to date automatically. */ | |
680 | val = find_symbol_value (XCONS (elt)->car); | |
681 | /* Use the current buffer value only if buf is the current buffer. */ | |
682 | if (buf != current_buffer) | |
553defa4 RS |
683 | val = XCONS (elt)->cdr; |
684 | ||
685 | /* If symbol is unbound, put just the symbol in the list. */ | |
686 | if (EQ (val, Qunbound)) | |
687 | result = Fcons (XCONS (elt)->car, result); | |
688 | /* Otherwise, put (symbol . value) in the list. */ | |
689 | else | |
690 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
691 | } |
692 | } | |
693 | ||
1ab256cb RM |
694 | /* Add on all the variables stored in special slots. */ |
695 | { | |
696 | register int offset, mask; | |
697 | ||
698 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
699 | offset < sizeof (struct buffer); | |
4d2f1389 | 700 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 701 | { |
aab80822 | 702 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 703 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
704 | if (SYMBOLP (*(Lisp_Object *)(offset |
705 | + (char *)&buffer_local_symbols))) | |
706 | result = Fcons (Fcons (*((Lisp_Object *) | |
707 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
708 | *(Lisp_Object *)(offset + (char *)buf)), |
709 | result); | |
1ab256cb RM |
710 | } |
711 | } | |
553defa4 RS |
712 | |
713 | return result; | |
1ab256cb RM |
714 | } |
715 | ||
716 | \f | |
717 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
718 | 0, 1, 0, | |
719 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
720 | No argument or nil as argument means use current buffer as BUFFER.") | |
721 | (buffer) | |
722 | register Lisp_Object buffer; | |
723 | { | |
724 | register struct buffer *buf; | |
265a9e55 | 725 | if (NILP (buffer)) |
1ab256cb RM |
726 | buf = current_buffer; |
727 | else | |
728 | { | |
729 | CHECK_BUFFER (buffer, 0); | |
730 | buf = XBUFFER (buffer); | |
731 | } | |
732 | ||
336cd056 | 733 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
734 | } |
735 | ||
736 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
737 | 1, 1, 0, | |
738 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
739 | A non-nil FLAG means mark the buffer modified.") | |
740 | (flag) | |
741 | register Lisp_Object flag; | |
742 | { | |
743 | register int already; | |
744 | register Lisp_Object fn; | |
745 | ||
746 | #ifdef CLASH_DETECTION | |
747 | /* If buffer becoming modified, lock the file. | |
748 | If buffer becoming unmodified, unlock the file. */ | |
749 | ||
60f4dd23 | 750 | fn = current_buffer->file_truename; |
265a9e55 | 751 | if (!NILP (fn)) |
1ab256cb | 752 | { |
336cd056 | 753 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 754 | if (!already && !NILP (flag)) |
1ab256cb | 755 | lock_file (fn); |
265a9e55 | 756 | else if (already && NILP (flag)) |
1ab256cb RM |
757 | unlock_file (fn); |
758 | } | |
759 | #endif /* CLASH_DETECTION */ | |
760 | ||
336cd056 | 761 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
762 | update_mode_lines++; |
763 | return flag; | |
764 | } | |
765 | ||
766 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
767 | 0, 1, 0, | |
768 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
769 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
770 | that buffer is changed. It wraps around occasionally.\n\ | |
771 | No argument or nil as argument means use current buffer as BUFFER.") | |
772 | (buffer) | |
773 | register Lisp_Object buffer; | |
774 | { | |
775 | register struct buffer *buf; | |
265a9e55 | 776 | if (NILP (buffer)) |
1ab256cb RM |
777 | buf = current_buffer; |
778 | else | |
779 | { | |
780 | CHECK_BUFFER (buffer, 0); | |
781 | buf = XBUFFER (buffer); | |
782 | } | |
783 | ||
784 | return make_number (BUF_MODIFF (buf)); | |
785 | } | |
786 | \f | |
01050cb5 | 787 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 788 | "sRename buffer (to new name): \nP", |
1ab256cb | 789 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 790 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 791 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 792 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 793 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
794 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
795 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 796 | This does not change the name of the visited file (if any).") |
489c043a RS |
797 | (newname, unique) |
798 | register Lisp_Object newname, unique; | |
1ab256cb RM |
799 | { |
800 | register Lisp_Object tem, buf; | |
801 | ||
489c043a | 802 | CHECK_STRING (newname, 0); |
d59698c4 | 803 | |
489c043a | 804 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
805 | error ("Empty string is invalid as a buffer name"); |
806 | ||
489c043a | 807 | tem = Fget_buffer (newname); |
c059b5ea RM |
808 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
809 | the buffer automatically so you can create another with the original name. | |
810 | It makes UNIQUE equivalent to | |
489c043a | 811 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 812 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 813 | return current_buffer->name; |
265a9e55 | 814 | if (!NILP (tem)) |
01050cb5 | 815 | { |
3bd779aa | 816 | if (!NILP (unique)) |
489c043a | 817 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 818 | else |
489c043a | 819 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 820 | } |
1ab256cb | 821 | |
489c043a | 822 | current_buffer->name = newname; |
76f590d7 JB |
823 | |
824 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
825 | any windows displaying current_buffer will stay unchanged. */ | |
826 | update_mode_lines++; | |
827 | ||
67180c6a | 828 | XSETBUFFER (buf, current_buffer); |
489c043a | 829 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
830 | if (NILP (current_buffer->filename) |
831 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 832 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
833 | /* Refetch since that last call may have done GC. */ |
834 | return current_buffer->name; | |
1ab256cb RM |
835 | } |
836 | ||
a0ebb746 | 837 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 838 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
839 | Buffers not visible in windows are preferred to visible buffers,\n\ |
840 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
841 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
842 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
843 | (buffer, visible_ok) |
844 | register Lisp_Object buffer, visible_ok; | |
1ab256cb | 845 | { |
89132f25 | 846 | Lisp_Object Fset_buffer_major_mode (); |
1ab256cb RM |
847 | register Lisp_Object tail, buf, notsogood, tem; |
848 | notsogood = Qnil; | |
849 | ||
265a9e55 | 850 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
851 | { |
852 | buf = Fcdr (Fcar (tail)); | |
853 | if (EQ (buf, buffer)) | |
854 | continue; | |
855 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
856 | continue; | |
04ae1b48 RS |
857 | /* If the selected frame has a buffer_predicate, |
858 | disregard buffers that don't fit the predicate. */ | |
859 | tem = frame_buffer_predicate (); | |
860 | if (!NILP (tem)) | |
861 | { | |
862 | tem = call1 (tem, buf); | |
863 | if (NILP (tem)) | |
864 | continue; | |
865 | } | |
04ae1b48 | 866 | |
a0ebb746 | 867 | if (NILP (visible_ok)) |
db732e5a | 868 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
869 | else |
870 | tem = Qnil; | |
265a9e55 | 871 | if (NILP (tem)) |
1ab256cb | 872 | return buf; |
265a9e55 | 873 | if (NILP (notsogood)) |
1ab256cb RM |
874 | notsogood = buf; |
875 | } | |
265a9e55 | 876 | if (!NILP (notsogood)) |
1ab256cb | 877 | return notsogood; |
89132f25 KH |
878 | buf = Fget_buffer_create (build_string ("*scratch*")); |
879 | Fset_buffer_major_mode (buf); | |
880 | return buf; | |
1ab256cb RM |
881 | } |
882 | \f | |
316784fb KH |
883 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
884 | 0, 1, "", | |
5b8bcf48 RS |
885 | "Make BUFFER stop keeping undo information.\n\ |
886 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
887 | (buffer) |
888 | register Lisp_Object buffer; | |
1ab256cb | 889 | { |
ffd56f97 JB |
890 | Lisp_Object real_buffer; |
891 | ||
892 | if (NILP (buffer)) | |
67180c6a | 893 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
894 | else |
895 | { | |
896 | real_buffer = Fget_buffer (buffer); | |
897 | if (NILP (real_buffer)) | |
898 | nsberror (buffer); | |
899 | } | |
900 | ||
901 | XBUFFER (real_buffer)->undo_list = Qt; | |
902 | ||
1ab256cb RM |
903 | return Qnil; |
904 | } | |
905 | ||
906 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
907 | 0, 1, "", | |
908 | "Start keeping undo information for buffer BUFFER.\n\ | |
909 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
910 | (buffer) |
911 | register Lisp_Object buffer; | |
1ab256cb | 912 | { |
ffd56f97 | 913 | Lisp_Object real_buffer; |
1ab256cb | 914 | |
ffd56f97 | 915 | if (NILP (buffer)) |
67180c6a | 916 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
917 | else |
918 | { | |
ffd56f97 JB |
919 | real_buffer = Fget_buffer (buffer); |
920 | if (NILP (real_buffer)) | |
921 | nsberror (buffer); | |
1ab256cb RM |
922 | } |
923 | ||
ffd56f97 JB |
924 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
925 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
926 | |
927 | return Qnil; | |
928 | } | |
929 | ||
930 | /* | |
931 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
932 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
933 | The buffer being killed will be current while the hook is running.\n\ | |
934 | See `kill-buffer'." | |
935 | */ | |
936 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
937 | "Kill the buffer BUFFER.\n\ | |
938 | The argument may be a buffer or may be the name of a buffer.\n\ | |
939 | An argument of nil means kill the current buffer.\n\n\ | |
940 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
941 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
942 | if not void, is a list of functions to be called, with no arguments,\n\ | |
943 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
944 | when the hook functions are called.\n\n\ | |
945 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 946 | with SIGHUP.") |
a25f13ae KH |
947 | (buffer) |
948 | Lisp_Object buffer; | |
1ab256cb RM |
949 | { |
950 | Lisp_Object buf; | |
951 | register struct buffer *b; | |
952 | register Lisp_Object tem; | |
953 | register struct Lisp_Marker *m; | |
954 | struct gcpro gcpro1, gcpro2; | |
955 | ||
a25f13ae | 956 | if (NILP (buffer)) |
1ab256cb RM |
957 | buf = Fcurrent_buffer (); |
958 | else | |
a25f13ae | 959 | buf = Fget_buffer (buffer); |
265a9e55 | 960 | if (NILP (buf)) |
a25f13ae | 961 | nsberror (buffer); |
1ab256cb RM |
962 | |
963 | b = XBUFFER (buf); | |
964 | ||
4a4a9db5 KH |
965 | /* Avoid trouble for buffer already dead. */ |
966 | if (NILP (b->name)) | |
967 | return Qnil; | |
968 | ||
1ab256cb | 969 | /* Query if the buffer is still modified. */ |
265a9e55 | 970 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 971 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 972 | { |
a25f13ae | 973 | GCPRO1 (buf); |
1ab256cb RM |
974 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
975 | XSTRING (b->name)->data)); | |
976 | UNGCPRO; | |
265a9e55 | 977 | if (NILP (tem)) |
1ab256cb RM |
978 | return Qnil; |
979 | } | |
980 | ||
dcdffbf6 | 981 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
982 | { |
983 | register Lisp_Object val; | |
984 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 985 | Lisp_Object list; |
1ab256cb RM |
986 | |
987 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
988 | set_buffer_internal (b); | |
dcdffbf6 RS |
989 | |
990 | /* First run the query functions; if any query is answered no, | |
991 | don't kill the buffer. */ | |
992 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
993 | { | |
994 | tem = call0 (Fcar (list)); | |
995 | if (NILP (tem)) | |
996 | return unbind_to (count, Qnil); | |
997 | } | |
998 | ||
999 | /* Then run the hooks. */ | |
fd186f07 RS |
1000 | if (!NILP (Vrun_hooks)) |
1001 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1002 | unbind_to (count, Qnil); |
1003 | } | |
1004 | ||
1005 | /* We have no more questions to ask. Verify that it is valid | |
1006 | to kill the buffer. This must be done after the questions | |
1007 | since anything can happen within do_yes_or_no_p. */ | |
1008 | ||
1009 | /* Don't kill the minibuffer now current. */ | |
1010 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1011 | return Qnil; | |
1012 | ||
265a9e55 | 1013 | if (NILP (b->name)) |
1ab256cb RM |
1014 | return Qnil; |
1015 | ||
336cd056 RS |
1016 | /* When we kill a base buffer, kill all its indirect buffers. |
1017 | We do it at this stage so nothing terrible happens if they | |
1018 | ask questions or their hooks get errors. */ | |
1019 | if (! b->base_buffer) | |
1020 | { | |
1021 | struct buffer *other; | |
1022 | ||
1023 | GCPRO1 (buf); | |
1024 | ||
1025 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1026 | /* all_buffers contains dead buffers too; |
1027 | don't re-kill them. */ | |
1028 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1029 | { |
1030 | Lisp_Object buf; | |
1031 | XSETBUFFER (buf, other); | |
1032 | Fkill_buffer (buf); | |
1033 | } | |
1034 | ||
1035 | UNGCPRO; | |
1036 | } | |
1037 | ||
1ab256cb RM |
1038 | /* Make this buffer not be current. |
1039 | In the process, notice if this is the sole visible buffer | |
1040 | and give up if so. */ | |
1041 | if (b == current_buffer) | |
1042 | { | |
172a9c1f | 1043 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
1044 | Fset_buffer (tem); |
1045 | if (b == current_buffer) | |
1046 | return Qnil; | |
1047 | } | |
1048 | ||
1049 | /* Now there is no question: we can kill the buffer. */ | |
1050 | ||
1051 | #ifdef CLASH_DETECTION | |
1052 | /* Unlock this buffer's file, if it is locked. */ | |
1053 | unlock_buffer (b); | |
1054 | #endif /* CLASH_DETECTION */ | |
1055 | ||
1ab256cb | 1056 | kill_buffer_processes (buf); |
1ab256cb RM |
1057 | |
1058 | tem = Vinhibit_quit; | |
1059 | Vinhibit_quit = Qt; | |
00550f94 | 1060 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1061 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
1ab256cb RM |
1062 | Vinhibit_quit = tem; |
1063 | ||
9b59d6d0 | 1064 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1065 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 RS |
1066 | && b->auto_save_modified != 0 |
1067 | && SAVE_MODIFF < b->auto_save_modified) | |
1ab256cb RM |
1068 | { |
1069 | Lisp_Object tem; | |
1070 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1071 | if (! NILP (tem)) |
cbb6a418 | 1072 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1073 | } |
1074 | ||
4a4a9db5 KH |
1075 | if (b->base_buffer) |
1076 | { | |
1077 | /* Unchain all markers that belong to this indirect buffer. | |
1078 | Don't unchain the markers that belong to the base buffer | |
1079 | or its other indirect buffers. */ | |
1080 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1081 | { | |
1082 | Lisp_Object next; | |
1083 | m = XMARKER (tem); | |
1084 | next = m->chain; | |
1085 | if (m->buffer == b) | |
1086 | unchain_marker (tem); | |
1087 | tem = next; | |
1088 | } | |
1089 | } | |
1090 | else | |
1ab256cb | 1091 | { |
4a4a9db5 | 1092 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1093 | and leave them pointing nowhere. */ |
4a4a9db5 | 1094 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1095 | { |
1096 | m = XMARKER (tem); | |
1097 | m->buffer = 0; | |
1098 | tem = m->chain; | |
1099 | m->chain = Qnil; | |
1100 | } | |
1101 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1102 | |
336cd056 RS |
1103 | #ifdef USE_TEXT_PROPERTIES |
1104 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1105 | #endif | |
1106 | ||
1107 | /* Perhaps we should explicitly free the interval tree here... */ | |
1108 | } | |
33f7013e | 1109 | |
2f3f993b RS |
1110 | /* Reset the local variables, so that this buffer's local values |
1111 | won't be protected from GC. They would be protected | |
1112 | if they happened to remain encached in their symbols. | |
1113 | This gets rid of them for certain. */ | |
1114 | swap_out_buffer_local_variables (b); | |
13de9290 | 1115 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1116 | |
1ab256cb | 1117 | b->name = Qnil; |
336cd056 | 1118 | |
9ac0d9e0 | 1119 | BLOCK_INPUT; |
336cd056 RS |
1120 | if (! b->base_buffer) |
1121 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1122 | ||
28e969dd JB |
1123 | if (b->newline_cache) |
1124 | { | |
1125 | free_region_cache (b->newline_cache); | |
1126 | b->newline_cache = 0; | |
1127 | } | |
1128 | if (b->width_run_cache) | |
1129 | { | |
1130 | free_region_cache (b->width_run_cache); | |
1131 | b->width_run_cache = 0; | |
1132 | } | |
1133 | b->width_table = Qnil; | |
9ac0d9e0 | 1134 | UNBLOCK_INPUT; |
1ab256cb RM |
1135 | b->undo_list = Qnil; |
1136 | ||
1137 | return Qt; | |
1138 | } | |
1139 | \f | |
36a8c287 JB |
1140 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1141 | we do this each time BUF is selected visibly, the more recently | |
1142 | selected buffers are always closer to the front of the list. This | |
1143 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1144 | |
1145 | record_buffer (buf) | |
1146 | Lisp_Object buf; | |
1147 | { | |
1148 | register Lisp_Object link, prev; | |
1149 | ||
1150 | prev = Qnil; | |
1151 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1152 | { | |
1153 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1154 | break; | |
1155 | prev = link; | |
1156 | } | |
1157 | ||
36a8c287 JB |
1158 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1159 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1160 | |
265a9e55 | 1161 | if (NILP (prev)) |
1ab256cb RM |
1162 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1163 | else | |
1164 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1165 | ||
1166 | XCONS(link)->cdr = Vbuffer_alist; | |
1167 | Vbuffer_alist = link; | |
1168 | } | |
1169 | ||
a9ee7a59 KH |
1170 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1171 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1172 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1173 | the current buffer's major mode.") | |
a2428fa2 EN |
1174 | (buffer) |
1175 | Lisp_Object buffer; | |
a9ee7a59 KH |
1176 | { |
1177 | int count; | |
1178 | Lisp_Object function; | |
1179 | ||
1180 | function = buffer_defaults.major_mode; | |
1181 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1182 | function = current_buffer->major_mode; | |
1183 | ||
1184 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1185 | return Qnil; | |
1186 | ||
1187 | count = specpdl_ptr - specpdl; | |
1188 | ||
1189 | /* To select a nonfundamental mode, | |
1190 | select the buffer temporarily and then call the mode function. */ | |
1191 | ||
1192 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1193 | ||
a2428fa2 | 1194 | Fset_buffer (buffer); |
a9ee7a59 KH |
1195 | call0 (function); |
1196 | ||
1197 | return unbind_to (count, Qnil); | |
1198 | } | |
1199 | ||
1ab256cb RM |
1200 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1201 | "Select buffer BUFFER in the current window.\n\ | |
1202 | BUFFER may be a buffer or a buffer name.\n\ | |
1203 | Optional second arg NORECORD non-nil means\n\ | |
1204 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1205 | \n\ | |
1206 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1207 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1208 | the window-buffer correspondences.") | |
a25f13ae KH |
1209 | (buffer, norecord) |
1210 | Lisp_Object buffer, norecord; | |
1ab256cb RM |
1211 | { |
1212 | register Lisp_Object buf; | |
1213 | Lisp_Object tem; | |
1214 | ||
1215 | if (EQ (minibuf_window, selected_window)) | |
1216 | error ("Cannot switch buffers in minibuffer window"); | |
1217 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1218 | if (!NILP (tem)) |
1ab256cb RM |
1219 | error ("Cannot switch buffers in a dedicated window"); |
1220 | ||
a25f13ae | 1221 | if (NILP (buffer)) |
172a9c1f | 1222 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1223 | else |
a9ee7a59 | 1224 | { |
a25f13ae | 1225 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1226 | if (NILP (buf)) |
1227 | { | |
a25f13ae | 1228 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1229 | Fset_buffer_major_mode (buf); |
1230 | } | |
1231 | } | |
1ab256cb | 1232 | Fset_buffer (buf); |
265a9e55 | 1233 | if (NILP (norecord)) |
1ab256cb RM |
1234 | record_buffer (buf); |
1235 | ||
1236 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1237 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1238 | : selected_window, | |
1ab256cb RM |
1239 | buf); |
1240 | ||
e8b3a22d | 1241 | return buf; |
1ab256cb RM |
1242 | } |
1243 | ||
1244 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
1245 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
1246 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1247 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1248 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1249 | window even if BUFFER is already visible in the selected window.\n\ |
1250 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
1251 | of `display-buffer' for additional customization information.") | |
a2428fa2 EN |
1252 | (buffer, other_window) |
1253 | Lisp_Object buffer, other_window; | |
1ab256cb RM |
1254 | { |
1255 | register Lisp_Object buf; | |
a25f13ae | 1256 | if (NILP (buffer)) |
172a9c1f | 1257 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1258 | else |
7c2087ee | 1259 | { |
a25f13ae | 1260 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1261 | if (NILP (buf)) |
1262 | { | |
a25f13ae | 1263 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1264 | Fset_buffer_major_mode (buf); |
1265 | } | |
1266 | } | |
1ab256cb RM |
1267 | Fset_buffer (buf); |
1268 | record_buffer (buf); | |
a2428fa2 | 1269 | Fselect_window (Fdisplay_buffer (buf, other_window)); |
e8b3a22d | 1270 | return buf; |
1ab256cb RM |
1271 | } |
1272 | ||
1273 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1274 | "Return the current buffer as a Lisp object.") | |
1275 | () | |
1276 | { | |
1277 | register Lisp_Object buf; | |
67180c6a | 1278 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1279 | return buf; |
1280 | } | |
1281 | \f | |
c7aa5005 | 1282 | /* Set the current buffer to B. */ |
1ab256cb RM |
1283 | |
1284 | void | |
1285 | set_buffer_internal (b) | |
1286 | register struct buffer *b; | |
1287 | { | |
1288 | register struct buffer *old_buf; | |
1289 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1290 | Lisp_Object tem; |
1ab256cb RM |
1291 | |
1292 | if (current_buffer == b) | |
1293 | return; | |
1294 | ||
1295 | windows_or_buffers_changed = 1; | |
c7aa5005 KH |
1296 | set_buffer_internal_1 (b); |
1297 | } | |
1298 | ||
1299 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1300 | This is used by redisplay. */ | |
1301 | ||
1302 | void | |
1303 | set_buffer_internal_1 (b) | |
1304 | register struct buffer *b; | |
1305 | { | |
1306 | register struct buffer *old_buf; | |
1307 | register Lisp_Object tail, valcontents; | |
1308 | Lisp_Object tem; | |
1309 | ||
1310 | if (current_buffer == b) | |
1311 | return; | |
1312 | ||
1ab256cb RM |
1313 | old_buf = current_buffer; |
1314 | current_buffer = b; | |
1315 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1316 | ||
336cd056 RS |
1317 | if (old_buf) |
1318 | { | |
1319 | /* Put the undo list back in the base buffer, so that it appears | |
1320 | that an indirect buffer shares the undo list of its base. */ | |
1321 | if (old_buf->base_buffer) | |
1322 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1323 | ||
1324 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1325 | when it is not current, update them now. */ | |
1326 | if (! NILP (old_buf->pt_marker)) | |
1327 | { | |
1328 | Lisp_Object obuf; | |
1329 | XSETBUFFER (obuf, old_buf); | |
1330 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1331 | } | |
1332 | if (! NILP (old_buf->begv_marker)) | |
1333 | { | |
1334 | Lisp_Object obuf; | |
1335 | XSETBUFFER (obuf, old_buf); | |
1336 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1337 | } | |
1338 | if (! NILP (old_buf->zv_marker)) | |
1339 | { | |
1340 | Lisp_Object obuf; | |
1341 | XSETBUFFER (obuf, old_buf); | |
1342 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* Get the undo list from the base buffer, so that it appears | |
1347 | that an indirect buffer shares the undo list of its base. */ | |
1348 | if (b->base_buffer) | |
1349 | b->undo_list = b->base_buffer->undo_list; | |
1350 | ||
1351 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1352 | when it is not current, fetch them now. */ | |
1353 | if (! NILP (b->pt_marker)) | |
1354 | BUF_PT (b) = marker_position (b->pt_marker); | |
1355 | if (! NILP (b->begv_marker)) | |
1356 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1357 | if (! NILP (b->zv_marker)) | |
1358 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1359 | ||
1ab256cb RM |
1360 | /* Look down buffer's list of local Lisp variables |
1361 | to find and update any that forward into C variables. */ | |
1362 | ||
265a9e55 | 1363 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1364 | { |
1365 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1366 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1367 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1368 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1369 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1370 | /* Just reference the variable |
1371 | to cause it to become set for this buffer. */ | |
1372 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1373 | } | |
1374 | ||
1375 | /* Do the same with any others that were local to the previous buffer */ | |
1376 | ||
1377 | if (old_buf) | |
265a9e55 | 1378 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1379 | { |
1380 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1381 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1382 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1383 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1384 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1385 | /* Just reference the variable |
1386 | to cause it to become set for this buffer. */ | |
1387 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1388 | } | |
1389 | } | |
1390 | ||
336cd056 | 1391 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1392 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1393 | |
1394 | void | |
1395 | set_buffer_temp (b) | |
1396 | struct buffer *b; | |
1397 | { | |
1398 | register struct buffer *old_buf; | |
1399 | ||
1400 | if (current_buffer == b) | |
1401 | return; | |
1402 | ||
1403 | old_buf = current_buffer; | |
1404 | current_buffer = b; | |
1405 | ||
1406 | if (old_buf) | |
1407 | { | |
1408 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1409 | when it is not current, update them now. */ | |
1410 | if (! NILP (old_buf->pt_marker)) | |
1411 | { | |
1412 | Lisp_Object obuf; | |
1413 | XSETBUFFER (obuf, old_buf); | |
1414 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1415 | } | |
1416 | if (! NILP (old_buf->begv_marker)) | |
1417 | { | |
1418 | Lisp_Object obuf; | |
1419 | XSETBUFFER (obuf, old_buf); | |
1420 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1421 | } | |
1422 | if (! NILP (old_buf->zv_marker)) | |
1423 | { | |
1424 | Lisp_Object obuf; | |
1425 | XSETBUFFER (obuf, old_buf); | |
1426 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1431 | when it is not current, fetch them now. */ | |
1432 | if (! NILP (b->pt_marker)) | |
1433 | BUF_PT (b) = marker_position (b->pt_marker); | |
1434 | if (! NILP (b->begv_marker)) | |
1435 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1436 | if (! NILP (b->zv_marker)) | |
1437 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1438 | } | |
1439 | ||
1ab256cb RM |
1440 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1441 | "Make the buffer BUFFER current for editing operations.\n\ | |
1442 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1443 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1444 | This function does not display the buffer, so its effect ends\n\ | |
1445 | when the current command terminates.\n\ | |
1446 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1447 | (buffer) |
1448 | register Lisp_Object buffer; | |
1ab256cb | 1449 | { |
a25f13ae KH |
1450 | register Lisp_Object buf; |
1451 | buf = Fget_buffer (buffer); | |
1452 | if (NILP (buf)) | |
1453 | nsberror (buffer); | |
1454 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1455 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1456 | set_buffer_internal (XBUFFER (buf)); |
1457 | return buf; | |
1ab256cb RM |
1458 | } |
1459 | \f | |
1460 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1461 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1462 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1463 | () | |
1464 | { | |
a96b68f1 RS |
1465 | if (!NILP (current_buffer->read_only) |
1466 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1467 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1468 | return Qnil; | |
1469 | } | |
1470 | ||
1471 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1472 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1473 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1474 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1475 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1476 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1477 | selected window if it is displayed there.") | |
a2428fa2 EN |
1478 | (buffer) |
1479 | register Lisp_Object buffer; | |
1ab256cb | 1480 | { |
b271272a | 1481 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1482 | if (NILP (buffer)) |
a5611885 | 1483 | { |
a2428fa2 | 1484 | XSETBUFFER (buffer, current_buffer); |
a5611885 JB |
1485 | |
1486 | /* If we're burying the current buffer, unshow it. */ | |
a2428fa2 | 1487 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil), Qnil); |
a5611885 | 1488 | } |
1ab256cb RM |
1489 | else |
1490 | { | |
1491 | Lisp_Object buf1; | |
1492 | ||
a2428fa2 | 1493 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1494 | if (NILP (buf1)) |
a2428fa2 EN |
1495 | nsberror (buffer); |
1496 | buffer = buf1; | |
b271272a JB |
1497 | } |
1498 | ||
a2428fa2 | 1499 | /* Move buffer to the end of the buffer list. */ |
b271272a JB |
1500 | { |
1501 | register Lisp_Object aelt, link; | |
1502 | ||
a2428fa2 | 1503 | aelt = Frassq (buffer, Vbuffer_alist); |
b271272a JB |
1504 | link = Fmemq (aelt, Vbuffer_alist); |
1505 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1506 | XCONS (link)->cdr = Qnil; | |
1507 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1508 | } | |
1ab256cb | 1509 | |
1ab256cb RM |
1510 | return Qnil; |
1511 | } | |
1512 | \f | |
c922bc55 | 1513 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1514 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1515 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1516 | so the buffer is truly empty after this.") |
1517 | () | |
1518 | { | |
1519 | Fwiden (); | |
1520 | del_range (BEG, Z); | |
1521 | current_buffer->last_window_start = 1; | |
1522 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1523 | if future size is less than past size. Use of erase-buffer | |
1524 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1525 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1526 | return Qnil; |
1527 | } | |
1528 | ||
1529 | validate_region (b, e) | |
1530 | register Lisp_Object *b, *e; | |
1531 | { | |
1ab256cb RM |
1532 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1533 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1534 | ||
1535 | if (XINT (*b) > XINT (*e)) | |
1536 | { | |
03192067 KH |
1537 | Lisp_Object tem; |
1538 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1539 | } |
1540 | ||
1541 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1542 | && XINT (*e) <= ZV)) | |
1543 | args_out_of_range (*b, *e); | |
1544 | } | |
1545 | \f | |
1ab256cb RM |
1546 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1547 | 0, 0, 0, | |
1548 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1549 | Most local variable bindings are eliminated so that the default values\n\ | |
1550 | become effective once more. Also, the syntax table is set from\n\ | |
1551 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1552 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1553 | This function also forces redisplay of the mode line.\n\ | |
1554 | \n\ | |
1555 | Every function to select a new major mode starts by\n\ | |
1556 | calling this function.\n\n\ | |
1557 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1558 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1559 | \n\ | |
1560 | The first thing this function does is run\n\ | |
1561 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1562 | () |
1563 | { | |
1564 | register Lisp_Object alist, sym, tem; | |
1565 | Lisp_Object oalist; | |
7410477a | 1566 | |
fd186f07 RS |
1567 | if (!NILP (Vrun_hooks)) |
1568 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1569 | oalist = current_buffer->local_var_alist; |
1570 | ||
2f3f993b RS |
1571 | /* Make sure none of the bindings in oalist |
1572 | remain swapped in, in their symbols. */ | |
1ab256cb | 1573 | |
2f3f993b | 1574 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
1575 | |
1576 | /* Actually eliminate all local bindings of this buffer. */ | |
1577 | ||
13de9290 | 1578 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
1579 | |
1580 | /* Redisplay mode lines; we are changing major mode. */ | |
1581 | ||
1582 | update_mode_lines++; | |
1583 | ||
1584 | /* Any which are supposed to be permanent, | |
1585 | make local again, with the same values they had. */ | |
1586 | ||
265a9e55 | 1587 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1588 | { |
1589 | sym = XCONS (XCONS (alist)->car)->car; | |
1590 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1591 | if (! NILP (tem)) |
01050cb5 RM |
1592 | { |
1593 | Fmake_local_variable (sym); | |
1594 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1595 | } | |
1ab256cb RM |
1596 | } |
1597 | ||
1598 | /* Force mode-line redisplay. Useful here because all major mode | |
1599 | commands call this function. */ | |
1600 | update_mode_lines++; | |
1601 | ||
1602 | return Qnil; | |
1603 | } | |
2f3f993b RS |
1604 | |
1605 | /* Make sure no local variables remain set up with buffer B | |
1606 | for their current values. */ | |
1607 | ||
1608 | static void | |
1609 | swap_out_buffer_local_variables (b) | |
1610 | struct buffer *b; | |
1611 | { | |
1612 | Lisp_Object oalist, alist, sym, tem, buffer; | |
1613 | ||
1614 | XSETBUFFER (buffer, b); | |
1615 | oalist = b->local_var_alist; | |
1616 | ||
1617 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) | |
1618 | { | |
1619 | sym = XCONS (XCONS (alist)->car)->car; | |
1620 | ||
1621 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1622 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; | |
1623 | if (XBUFFER (tem) == current_buffer) | |
1624 | { | |
1625 | /* Symbol is set up for this buffer's old local value. | |
1626 | Set it up for the current buffer with the default value. */ | |
1627 | ||
1628 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; | |
1629 | /* Store the symbol's current value into the alist entry | |
1630 | it is currently set up for. This is so that, if the | |
1631 | local is marked permanent, and we make it local again | |
1632 | later in Fkill_all_local_variables, we don't lose the value. */ | |
1633 | XCONS (XCONS (tem)->car)->cdr | |
1634 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); | |
1635 | /* Switch to the symbol's default-value alist entry. */ | |
1636 | XCONS (tem)->car = tem; | |
1637 | /* Mark it as current for buffer B. */ | |
1638 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car | |
1639 | = buffer; | |
1640 | /* Store the current value into any forwarding in the symbol. */ | |
1641 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, | |
1642 | XCONS (tem)->cdr); | |
1643 | } | |
1644 | } | |
1645 | } | |
1ab256cb | 1646 | \f |
2eec3b4e RS |
1647 | /* Find all the overlays in the current buffer that contain position POS. |
1648 | Return the number found, and store them in a vector in *VEC_PTR. | |
1649 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1650 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1651 | or ZV if there are no more overlays. | |
bbbe9545 | 1652 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
239c932b RS |
1653 | or BEGV if there are no previous overlays. |
1654 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1655 | |
1656 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1657 | when this function is called. |
1658 | ||
1659 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1660 | If EXTEND is zero, we never extend the vector, | |
1661 | and we store only as many overlays as will fit. | |
1662 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1663 | |
1664 | int | |
239c932b | 1665 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1666 | int pos; |
61d54cd5 | 1667 | int extend; |
2eec3b4e RS |
1668 | Lisp_Object **vec_ptr; |
1669 | int *len_ptr; | |
1670 | int *next_ptr; | |
239c932b | 1671 | int *prev_ptr; |
1ab256cb | 1672 | { |
2eec3b4e RS |
1673 | Lisp_Object tail, overlay, start, end, result; |
1674 | int idx = 0; | |
1675 | int len = *len_ptr; | |
1676 | Lisp_Object *vec = *vec_ptr; | |
1677 | int next = ZV; | |
239c932b | 1678 | int prev = BEGV; |
61d54cd5 RS |
1679 | int inhibit_storing = 0; |
1680 | ||
2eec3b4e | 1681 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1682 | GC_CONSP (tail); |
2eec3b4e RS |
1683 | tail = XCONS (tail)->cdr) |
1684 | { | |
239c932b | 1685 | int startpos, endpos; |
52f8ec73 | 1686 | |
2eec3b4e | 1687 | overlay = XCONS (tail)->car; |
1ab256cb | 1688 | |
2eec3b4e RS |
1689 | start = OVERLAY_START (overlay); |
1690 | end = OVERLAY_END (overlay); | |
239c932b RS |
1691 | endpos = OVERLAY_POSITION (end); |
1692 | if (endpos < pos) | |
1693 | { | |
1694 | if (prev < endpos) | |
1695 | prev = endpos; | |
1696 | break; | |
1697 | } | |
1698 | if (endpos == pos) | |
1699 | continue; | |
2eec3b4e RS |
1700 | startpos = OVERLAY_POSITION (start); |
1701 | if (startpos <= pos) | |
1702 | { | |
1703 | if (idx == len) | |
1704 | { | |
61d54cd5 RS |
1705 | /* The supplied vector is full. |
1706 | Either make it bigger, or don't store any more in it. */ | |
1707 | if (extend) | |
1708 | { | |
1709 | *len_ptr = len *= 2; | |
1710 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1711 | *vec_ptr = vec; | |
1712 | } | |
1713 | else | |
1714 | inhibit_storing = 1; | |
2eec3b4e | 1715 | } |
61d54cd5 RS |
1716 | |
1717 | if (!inhibit_storing) | |
1718 | vec[idx] = overlay; | |
1719 | /* Keep counting overlays even if we can't return them all. */ | |
1720 | idx++; | |
2eec3b4e RS |
1721 | } |
1722 | else if (startpos < next) | |
1723 | next = startpos; | |
1724 | } | |
1725 | ||
1726 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1727 | GC_CONSP (tail); |
2eec3b4e | 1728 | tail = XCONS (tail)->cdr) |
1ab256cb | 1729 | { |
239c932b | 1730 | int startpos, endpos; |
52f8ec73 | 1731 | |
2eec3b4e | 1732 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1733 | |
1734 | start = OVERLAY_START (overlay); | |
1735 | end = OVERLAY_END (overlay); | |
1736 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1737 | if (pos < startpos) |
2eec3b4e RS |
1738 | { |
1739 | if (startpos < next) | |
1740 | next = startpos; | |
1741 | break; | |
1742 | } | |
239c932b RS |
1743 | endpos = OVERLAY_POSITION (end); |
1744 | if (pos < endpos) | |
2eec3b4e RS |
1745 | { |
1746 | if (idx == len) | |
1747 | { | |
61d54cd5 RS |
1748 | if (extend) |
1749 | { | |
1750 | *len_ptr = len *= 2; | |
1751 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1752 | *vec_ptr = vec; | |
1753 | } | |
1754 | else | |
1755 | inhibit_storing = 1; | |
2eec3b4e | 1756 | } |
61d54cd5 RS |
1757 | |
1758 | if (!inhibit_storing) | |
1759 | vec[idx] = overlay; | |
1760 | idx++; | |
2eec3b4e | 1761 | } |
239c932b RS |
1762 | else if (endpos < pos && endpos > prev) |
1763 | prev = endpos; | |
1ab256cb RM |
1764 | } |
1765 | ||
239c932b RS |
1766 | if (next_ptr) |
1767 | *next_ptr = next; | |
1768 | if (prev_ptr) | |
1769 | *prev_ptr = prev; | |
2eec3b4e RS |
1770 | return idx; |
1771 | } | |
74514898 RS |
1772 | \f |
1773 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
1774 | or are empty at BEG. |
1775 | ||
74514898 RS |
1776 | Return the number found, and store them in a vector in *VEC_PTR. |
1777 | Store in *LEN_PTR the size allocated for the vector. | |
1778 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
1779 | or ZV if there are no more overlays. | |
1780 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
1781 | or BEGV if there are no previous overlays. | |
1782 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
1783 | ||
1784 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
1785 | when this function is called. | |
1786 | ||
1787 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1788 | If EXTEND is zero, we never extend the vector, | |
1789 | and we store only as many overlays as will fit. | |
1790 | But we still return the total number of overlays. */ | |
1791 | ||
1792 | int | |
1793 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
1794 | int beg, end; | |
1795 | int extend; | |
1796 | Lisp_Object **vec_ptr; | |
1797 | int *len_ptr; | |
1798 | int *next_ptr; | |
1799 | int *prev_ptr; | |
1800 | { | |
1801 | Lisp_Object tail, overlay, ostart, oend, result; | |
1802 | int idx = 0; | |
1803 | int len = *len_ptr; | |
1804 | Lisp_Object *vec = *vec_ptr; | |
1805 | int next = ZV; | |
1806 | int prev = BEGV; | |
1807 | int inhibit_storing = 0; | |
1808 | ||
1809 | for (tail = current_buffer->overlays_before; | |
1810 | GC_CONSP (tail); | |
1811 | tail = XCONS (tail)->cdr) | |
1812 | { | |
1813 | int startpos, endpos; | |
1814 | ||
1815 | overlay = XCONS (tail)->car; | |
1816 | ||
1817 | ostart = OVERLAY_START (overlay); | |
1818 | oend = OVERLAY_END (overlay); | |
1819 | endpos = OVERLAY_POSITION (oend); | |
1820 | if (endpos < beg) | |
1821 | { | |
1822 | if (prev < endpos) | |
1823 | prev = endpos; | |
1824 | break; | |
1825 | } | |
1826 | startpos = OVERLAY_POSITION (ostart); | |
1827 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 1828 | or is empty at the start of the range. */ |
74514898 | 1829 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1830 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1831 | { |
1832 | if (idx == len) | |
1833 | { | |
1834 | /* The supplied vector is full. | |
1835 | Either make it bigger, or don't store any more in it. */ | |
1836 | if (extend) | |
1837 | { | |
1838 | *len_ptr = len *= 2; | |
1839 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1840 | *vec_ptr = vec; | |
1841 | } | |
1842 | else | |
1843 | inhibit_storing = 1; | |
1844 | } | |
1845 | ||
1846 | if (!inhibit_storing) | |
1847 | vec[idx] = overlay; | |
1848 | /* Keep counting overlays even if we can't return them all. */ | |
1849 | idx++; | |
1850 | } | |
1851 | else if (startpos < next) | |
1852 | next = startpos; | |
1853 | } | |
1854 | ||
1855 | for (tail = current_buffer->overlays_after; | |
1856 | GC_CONSP (tail); | |
1857 | tail = XCONS (tail)->cdr) | |
1858 | { | |
1859 | int startpos, endpos; | |
1860 | ||
1861 | overlay = XCONS (tail)->car; | |
1862 | ||
1863 | ostart = OVERLAY_START (overlay); | |
1864 | oend = OVERLAY_END (overlay); | |
1865 | startpos = OVERLAY_POSITION (ostart); | |
1866 | if (end < startpos) | |
1867 | { | |
1868 | if (startpos < next) | |
1869 | next = startpos; | |
1870 | break; | |
1871 | } | |
1872 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
1873 | /* Count an interval if it either overlaps the range |
1874 | or is empty at the start of the range. */ | |
74514898 | 1875 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1876 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1877 | { |
1878 | if (idx == len) | |
1879 | { | |
1880 | if (extend) | |
1881 | { | |
1882 | *len_ptr = len *= 2; | |
1883 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1884 | *vec_ptr = vec; | |
1885 | } | |
1886 | else | |
1887 | inhibit_storing = 1; | |
1888 | } | |
1889 | ||
1890 | if (!inhibit_storing) | |
1891 | vec[idx] = overlay; | |
1892 | idx++; | |
1893 | } | |
1894 | else if (endpos < beg && endpos > prev) | |
1895 | prev = endpos; | |
1896 | } | |
fc04fa47 | 1897 | |
74514898 RS |
1898 | if (next_ptr) |
1899 | *next_ptr = next; | |
1900 | if (prev_ptr) | |
1901 | *prev_ptr = prev; | |
1902 | return idx; | |
1903 | } | |
1904 | \f | |
fc04fa47 KH |
1905 | /* Fast function to just test if we're at an overlay boundary. */ |
1906 | int | |
1907 | overlay_touches_p (pos) | |
1908 | int pos; | |
1909 | { | |
1910 | Lisp_Object tail, overlay; | |
1911 | ||
1912 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
1913 | tail = XCONS (tail)->cdr) | |
1914 | { | |
1915 | int endpos; | |
1916 | ||
1917 | overlay = XCONS (tail)->car; | |
1918 | if (!GC_OVERLAYP (overlay)) | |
1919 | abort (); | |
1920 | ||
1921 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1922 | if (endpos < pos) | |
1923 | break; | |
1924 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
1925 | return 1; | |
1926 | } | |
1927 | ||
1928 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
1929 | tail = XCONS (tail)->cdr) | |
1930 | { | |
1931 | int startpos; | |
1932 | ||
1933 | overlay = XCONS (tail)->car; | |
1934 | if (!GC_OVERLAYP (overlay)) | |
1935 | abort (); | |
1936 | ||
1937 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1938 | if (pos < startpos) | |
1939 | break; | |
1940 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
1941 | return 1; | |
1942 | } | |
1943 | return 0; | |
1944 | } | |
2eec3b4e | 1945 | \f |
5985d248 KH |
1946 | struct sortvec |
1947 | { | |
1948 | Lisp_Object overlay; | |
1949 | int beg, end; | |
1950 | int priority; | |
1951 | }; | |
1952 | ||
1953 | static int | |
1954 | compare_overlays (s1, s2) | |
1955 | struct sortvec *s1, *s2; | |
1956 | { | |
1957 | if (s1->priority != s2->priority) | |
1958 | return s1->priority - s2->priority; | |
1959 | if (s1->beg != s2->beg) | |
1960 | return s1->beg - s2->beg; | |
1961 | if (s1->end != s2->end) | |
1962 | return s2->end - s1->end; | |
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | /* Sort an array of overlays by priority. The array is modified in place. | |
1967 | The return value is the new size; this may be smaller than the original | |
1968 | size if some of the overlays were invalid or were window-specific. */ | |
1969 | int | |
1970 | sort_overlays (overlay_vec, noverlays, w) | |
1971 | Lisp_Object *overlay_vec; | |
1972 | int noverlays; | |
1973 | struct window *w; | |
1974 | { | |
1975 | int i, j; | |
1976 | struct sortvec *sortvec; | |
1977 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1978 | ||
1979 | /* Put the valid and relevant overlays into sortvec. */ | |
1980 | ||
1981 | for (i = 0, j = 0; i < noverlays; i++) | |
1982 | { | |
0fa767e7 | 1983 | Lisp_Object tem; |
c99fc30f | 1984 | Lisp_Object overlay; |
5985d248 | 1985 | |
c99fc30f | 1986 | overlay = overlay_vec[i]; |
5985d248 KH |
1987 | if (OVERLAY_VALID (overlay) |
1988 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1989 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1990 | { | |
0fa767e7 KH |
1991 | /* If we're interested in a specific window, then ignore |
1992 | overlays that are limited to some other window. */ | |
1993 | if (w) | |
5985d248 | 1994 | { |
0fa767e7 KH |
1995 | Lisp_Object window; |
1996 | ||
1997 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 1998 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 1999 | continue; |
5985d248 | 2000 | } |
0fa767e7 KH |
2001 | |
2002 | /* This overlay is good and counts: put it into sortvec. */ | |
2003 | sortvec[j].overlay = overlay; | |
2004 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2005 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2006 | tem = Foverlay_get (overlay, Qpriority); | |
2007 | if (INTEGERP (tem)) | |
2008 | sortvec[j].priority = XINT (tem); | |
2009 | else | |
2010 | sortvec[j].priority = 0; | |
2011 | j++; | |
5985d248 KH |
2012 | } |
2013 | } | |
2014 | noverlays = j; | |
2015 | ||
2016 | /* Sort the overlays into the proper order: increasing priority. */ | |
2017 | ||
2018 | if (noverlays > 1) | |
2019 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2020 | ||
2021 | for (i = 0; i < noverlays; i++) | |
2022 | overlay_vec[i] = sortvec[i].overlay; | |
2023 | return (noverlays); | |
2024 | } | |
2025 | \f | |
bbbe9545 KH |
2026 | struct sortstr |
2027 | { | |
cb26008f | 2028 | Lisp_Object string, string2; |
bbbe9545 KH |
2029 | int size; |
2030 | int priority; | |
2031 | }; | |
2032 | ||
e8185fa8 KH |
2033 | struct sortstrlist |
2034 | { | |
2035 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2036 | int size; /* Allocated length of that array. */ | |
2037 | int used; /* How much of the array is currently in use. */ | |
2038 | int bytes; /* Total length of the strings in buf. */ | |
2039 | }; | |
2040 | ||
2041 | /* Buffers for storing information about the overlays touching a given | |
2042 | position. These could be automatic variables in overlay_strings, but | |
2043 | it's more efficient to hold onto the memory instead of repeatedly | |
2044 | allocating and freeing it. */ | |
2045 | static struct sortstrlist overlay_heads, overlay_tails; | |
2046 | static char *overlay_str_buf; | |
2047 | ||
2048 | /* Allocated length of overlay_str_buf. */ | |
2049 | static int overlay_str_len; | |
2050 | ||
bbbe9545 KH |
2051 | /* A comparison function suitable for passing to qsort. */ |
2052 | static int | |
2053 | cmp_for_strings (as1, as2) | |
2054 | char *as1, *as2; | |
2055 | { | |
2056 | struct sortstr *s1 = (struct sortstr *)as1; | |
2057 | struct sortstr *s2 = (struct sortstr *)as2; | |
2058 | if (s1->size != s2->size) | |
2059 | return s2->size - s1->size; | |
2060 | if (s1->priority != s2->priority) | |
2061 | return s1->priority - s2->priority; | |
2062 | return 0; | |
2063 | } | |
2064 | ||
e8185fa8 | 2065 | static void |
cb26008f | 2066 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2067 | struct sortstrlist *ssl; |
cb26008f | 2068 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2069 | int size; |
2070 | { | |
2071 | if (ssl->used == ssl->size) | |
2072 | { | |
2073 | if (ssl->buf) | |
2074 | ssl->size *= 2; | |
2075 | else | |
2076 | ssl->size = 5; | |
2077 | ssl->buf = ((struct sortstr *) | |
2078 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2079 | } | |
2080 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2081 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2082 | ssl->buf[ssl->used].size = size; |
2083 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2084 | ssl->used++; | |
2085 | ssl->bytes += XSTRING (str)->size; | |
cb26008f KH |
2086 | if (STRINGP (str2)) |
2087 | ssl->bytes += XSTRING (str2)->size; | |
e8185fa8 | 2088 | } |
bbbe9545 KH |
2089 | |
2090 | /* Return the concatenation of the strings associated with overlays that | |
2091 | begin or end at POS, ignoring overlays that are specific to a window | |
2092 | other than W. The strings are concatenated in the appropriate order: | |
2093 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2094 | lower. Normally all of the after-strings come first, but zero-sized |
2095 | overlays have their after-strings ride along with the before-strings | |
2096 | because it would look strange to print them inside-out. | |
2097 | ||
2098 | Returns the string length, and stores the contents indirectly through | |
2099 | PSTR, if that variable is non-null. The string may be overwritten by | |
2100 | subsequent calls. */ | |
6b5d3b89 | 2101 | |
bbbe9545 KH |
2102 | int |
2103 | overlay_strings (pos, w, pstr) | |
2104 | int pos; | |
2105 | struct window *w; | |
6b5d3b89 | 2106 | unsigned char **pstr; |
bbbe9545 | 2107 | { |
e8185fa8 | 2108 | Lisp_Object ov, overlay, window, str; |
bbbe9545 KH |
2109 | int startpos, endpos; |
2110 | ||
e8185fa8 KH |
2111 | overlay_heads.used = overlay_heads.bytes = 0; |
2112 | overlay_tails.used = overlay_tails.bytes = 0; | |
bbbe9545 KH |
2113 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
2114 | { | |
2115 | overlay = XCONS (ov)->car; | |
2116 | if (!OVERLAYP (overlay)) | |
2117 | abort (); | |
2118 | ||
2119 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2120 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2121 | if (endpos < pos) | |
2122 | break; | |
2123 | if (endpos != pos && startpos != pos) | |
2124 | continue; | |
2125 | window = Foverlay_get (overlay, Qwindow); | |
2126 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2127 | continue; | |
e8185fa8 KH |
2128 | if (startpos == pos |
2129 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2130 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2131 | (startpos == endpos |
2132 | ? Foverlay_get (overlay, Qafter_string) | |
2133 | : Qnil), | |
2134 | Foverlay_get (overlay, Qpriority), | |
2135 | endpos - startpos); | |
2136 | else if (endpos == pos | |
2137 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2138 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2139 | Foverlay_get (overlay, Qpriority), |
2140 | endpos - startpos); | |
bbbe9545 KH |
2141 | } |
2142 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) | |
2143 | { | |
2144 | overlay = XCONS (ov)->car; | |
2145 | if (!OVERLAYP (overlay)) | |
2146 | abort (); | |
2147 | ||
2148 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2149 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2150 | if (startpos > pos) | |
2151 | break; | |
e8185fa8 KH |
2152 | if (endpos != pos && startpos != pos) |
2153 | continue; | |
2154 | window = Foverlay_get (overlay, Qwindow); | |
2155 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2156 | continue; | |
e8185fa8 KH |
2157 | if (startpos == pos |
2158 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2159 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2160 | (startpos == endpos |
2161 | ? Foverlay_get (overlay, Qafter_string) | |
2162 | : Qnil), | |
2163 | Foverlay_get (overlay, Qpriority), | |
2164 | endpos - startpos); | |
2165 | else if (endpos == pos | |
2166 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2167 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2168 | Foverlay_get (overlay, Qpriority), |
2169 | endpos - startpos); | |
bbbe9545 | 2170 | } |
e8185fa8 KH |
2171 | if (overlay_tails.used > 1) |
2172 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2173 | cmp_for_strings); | |
2174 | if (overlay_heads.used > 1) | |
2175 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2176 | cmp_for_strings); | |
2177 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2178 | { |
e8185fa8 | 2179 | Lisp_Object tem; |
bbbe9545 KH |
2180 | int i; |
2181 | char *p; | |
e8185fa8 | 2182 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2183 | |
2184 | if (total > overlay_str_len) | |
e8185fa8 KH |
2185 | overlay_str_buf = (char *)xrealloc (overlay_str_buf, |
2186 | overlay_str_len = total); | |
bbbe9545 | 2187 | p = overlay_str_buf; |
e8185fa8 | 2188 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2189 | { |
e8185fa8 | 2190 | tem = overlay_tails.buf[i].string; |
bbbe9545 KH |
2191 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2192 | p += XSTRING (tem)->size; | |
2193 | } | |
e8185fa8 | 2194 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2195 | { |
e8185fa8 | 2196 | tem = overlay_heads.buf[i].string; |
bbbe9545 KH |
2197 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2198 | p += XSTRING (tem)->size; | |
cb26008f KH |
2199 | tem = overlay_heads.buf[i].string2; |
2200 | if (STRINGP (tem)) | |
2201 | { | |
2202 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); | |
2203 | p += XSTRING (tem)->size; | |
2204 | } | |
bbbe9545 | 2205 | } |
cb26008f KH |
2206 | if (p != overlay_str_buf + total) |
2207 | abort (); | |
bbbe9545 KH |
2208 | if (pstr) |
2209 | *pstr = overlay_str_buf; | |
e8185fa8 | 2210 | return total; |
bbbe9545 | 2211 | } |
e8185fa8 | 2212 | return 0; |
bbbe9545 KH |
2213 | } |
2214 | \f | |
5c4f68f1 | 2215 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2216 | |
2eec3b4e | 2217 | void |
5c4f68f1 JB |
2218 | recenter_overlay_lists (buf, pos) |
2219 | struct buffer *buf; | |
2eec3b4e RS |
2220 | int pos; |
2221 | { | |
2222 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2223 | ||
2224 | /* See if anything in overlays_before should move to overlays_after. */ | |
2225 | ||
2226 | /* We don't strictly need prev in this loop; it should always be nil. | |
2227 | But we use it for symmetry and in case that should cease to be true | |
2228 | with some future change. */ | |
2229 | prev = Qnil; | |
5c4f68f1 | 2230 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2231 | CONSP (tail); |
2232 | prev = tail, tail = next) | |
1ab256cb | 2233 | { |
2eec3b4e RS |
2234 | next = XCONS (tail)->cdr; |
2235 | overlay = XCONS (tail)->car; | |
2236 | ||
2237 | /* If the overlay is not valid, get rid of it. */ | |
2238 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2239 | #if 1 |
2240 | abort (); | |
2241 | #else | |
2eec3b4e RS |
2242 | { |
2243 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2244 | if (!NILP (prev)) | |
2245 | XCONS (prev)->cdr = next; | |
2246 | else | |
5c4f68f1 | 2247 | buf->overlays_before = next; |
2eec3b4e RS |
2248 | tail = prev; |
2249 | continue; | |
2250 | } | |
52f8ec73 | 2251 | #endif |
1ab256cb | 2252 | |
2eec3b4e RS |
2253 | beg = OVERLAY_START (overlay); |
2254 | end = OVERLAY_END (overlay); | |
1ab256cb | 2255 | |
2eec3b4e | 2256 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2257 | { |
2eec3b4e RS |
2258 | /* OVERLAY needs to be moved. */ |
2259 | int where = OVERLAY_POSITION (beg); | |
2260 | Lisp_Object other, other_prev; | |
2261 | ||
2262 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2263 | if (!NILP (prev)) | |
2264 | XCONS (prev)->cdr = next; | |
2265 | else | |
5c4f68f1 | 2266 | buf->overlays_before = next; |
2eec3b4e RS |
2267 | |
2268 | /* Search thru overlays_after for where to put it. */ | |
2269 | other_prev = Qnil; | |
5c4f68f1 | 2270 | for (other = buf->overlays_after; |
2eec3b4e RS |
2271 | CONSP (other); |
2272 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 2273 | { |
2eec3b4e RS |
2274 | Lisp_Object otherbeg, otheroverlay, follower; |
2275 | int win; | |
2276 | ||
2277 | otheroverlay = XCONS (other)->car; | |
2278 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2279 | abort (); |
2eec3b4e RS |
2280 | |
2281 | otherbeg = OVERLAY_START (otheroverlay); | |
2282 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2283 | break; | |
1ab256cb | 2284 | } |
2eec3b4e RS |
2285 | |
2286 | /* Add TAIL to overlays_after before OTHER. */ | |
2287 | XCONS (tail)->cdr = other; | |
2288 | if (!NILP (other_prev)) | |
2289 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 2290 | else |
5c4f68f1 | 2291 | buf->overlays_after = tail; |
2eec3b4e | 2292 | tail = prev; |
1ab256cb | 2293 | } |
2eec3b4e RS |
2294 | else |
2295 | /* We've reached the things that should stay in overlays_before. | |
2296 | All the rest of overlays_before must end even earlier, | |
2297 | so stop now. */ | |
2298 | break; | |
2299 | } | |
2300 | ||
2301 | /* See if anything in overlays_after should be in overlays_before. */ | |
2302 | prev = Qnil; | |
5c4f68f1 | 2303 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2304 | CONSP (tail); |
2305 | prev = tail, tail = next) | |
2306 | { | |
2307 | next = XCONS (tail)->cdr; | |
2308 | overlay = XCONS (tail)->car; | |
2309 | ||
2310 | /* If the overlay is not valid, get rid of it. */ | |
2311 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2312 | #if 1 |
2313 | abort (); | |
2314 | #else | |
2eec3b4e RS |
2315 | { |
2316 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2317 | if (!NILP (prev)) | |
2318 | XCONS (prev)->cdr = next; | |
2319 | else | |
5c4f68f1 | 2320 | buf->overlays_after = next; |
2eec3b4e RS |
2321 | tail = prev; |
2322 | continue; | |
2323 | } | |
52f8ec73 | 2324 | #endif |
2eec3b4e RS |
2325 | |
2326 | beg = OVERLAY_START (overlay); | |
2327 | end = OVERLAY_END (overlay); | |
2328 | ||
2329 | /* Stop looking, when we know that nothing further | |
2330 | can possibly end before POS. */ | |
2331 | if (OVERLAY_POSITION (beg) > pos) | |
2332 | break; | |
2333 | ||
2334 | if (OVERLAY_POSITION (end) <= pos) | |
2335 | { | |
2336 | /* OVERLAY needs to be moved. */ | |
2337 | int where = OVERLAY_POSITION (end); | |
2338 | Lisp_Object other, other_prev; | |
2339 | ||
2340 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2341 | if (!NILP (prev)) | |
2342 | XCONS (prev)->cdr = next; | |
2343 | else | |
5c4f68f1 | 2344 | buf->overlays_after = next; |
2eec3b4e RS |
2345 | |
2346 | /* Search thru overlays_before for where to put it. */ | |
2347 | other_prev = Qnil; | |
5c4f68f1 | 2348 | for (other = buf->overlays_before; |
2eec3b4e RS |
2349 | CONSP (other); |
2350 | other_prev = other, other = XCONS (other)->cdr) | |
2351 | { | |
2352 | Lisp_Object otherend, otheroverlay; | |
2353 | int win; | |
2354 | ||
2355 | otheroverlay = XCONS (other)->car; | |
2356 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2357 | abort (); |
2eec3b4e RS |
2358 | |
2359 | otherend = OVERLAY_END (otheroverlay); | |
2360 | if (OVERLAY_POSITION (otherend) <= where) | |
2361 | break; | |
2362 | } | |
2363 | ||
2364 | /* Add TAIL to overlays_before before OTHER. */ | |
2365 | XCONS (tail)->cdr = other; | |
2366 | if (!NILP (other_prev)) | |
2367 | XCONS (other_prev)->cdr = tail; | |
2368 | else | |
5c4f68f1 | 2369 | buf->overlays_before = tail; |
2eec3b4e RS |
2370 | tail = prev; |
2371 | } | |
2372 | } | |
2373 | ||
8d7a4592 | 2374 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 2375 | } |
2b1bdf65 | 2376 | |
423cdb46 KH |
2377 | void |
2378 | adjust_overlays_for_insert (pos, length) | |
2379 | int pos; | |
2380 | int length; | |
2381 | { | |
2382 | /* After an insertion, the lists are still sorted properly, | |
2383 | but we may need to update the value of the overlay center. */ | |
2384 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
2385 | XSETFASTINT (current_buffer->overlay_center, | |
2386 | XFASTINT (current_buffer->overlay_center) + length); | |
2387 | } | |
2388 | ||
2389 | void | |
2390 | adjust_overlays_for_delete (pos, length) | |
2391 | int pos; | |
2392 | int length; | |
2393 | { | |
2394 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
2395 | /* The deletion was to our right. No change needed; the before- and | |
2396 | after-lists are still consistent. */ | |
2397 | ; | |
2398 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
2399 | /* The deletion was to our left. We need to adjust the center value | |
2400 | to account for the change in position, but the lists are consistent | |
2401 | given the new value. */ | |
2402 | XSETFASTINT (current_buffer->overlay_center, | |
2403 | XFASTINT (current_buffer->overlay_center) - length); | |
2404 | else | |
2405 | /* We're right in the middle. There might be things on the after-list | |
2406 | that now belong on the before-list. Recentering will move them, | |
2407 | and also update the center point. */ | |
2408 | recenter_overlay_lists (current_buffer, pos); | |
2409 | } | |
2410 | ||
2b1bdf65 KH |
2411 | /* Fix up overlays that were garbled as a result of permuting markers |
2412 | in the range START through END. Any overlay with at least one | |
2413 | endpoint in this range will need to be unlinked from the overlay | |
2414 | list and reinserted in its proper place. | |
2415 | Such an overlay might even have negative size at this point. | |
2416 | If so, we'll reverse the endpoints. Can you think of anything | |
2417 | better to do in this situation? */ | |
2418 | void | |
2419 | fix_overlays_in_range (start, end) | |
2420 | register int start, end; | |
2421 | { | |
2422 | Lisp_Object tem, overlay; | |
2423 | Lisp_Object before_list, after_list; | |
2424 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2425 | int startpos, endpos; | |
2426 | ||
2427 | /* This algorithm shifts links around instead of consing and GCing. | |
2428 | The loop invariant is that before_list (resp. after_list) is a | |
2429 | well-formed list except that its last element, the one that | |
2430 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2431 | So it's not a bug that before_list isn't initialized, although | |
2432 | it may look strange. */ | |
2433 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2434 | { | |
2435 | overlay = XCONS (*ptail)->car; | |
2436 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2437 | if (endpos < start) | |
2438 | break; | |
2439 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2440 | if (endpos < end | |
2441 | || (startpos >= start && startpos < end)) | |
2442 | { | |
2443 | /* If the overlay is backwards, fix that now. */ | |
2444 | if (startpos > endpos) | |
2445 | { | |
2446 | int tem; | |
2447 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2448 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2449 | tem = startpos; startpos = endpos; endpos = tem; | |
2450 | } | |
2451 | /* Add it to the end of the wrong list. Later on, | |
2452 | recenter_overlay_lists will move it to the right place. */ | |
2453 | if (endpos < XINT (current_buffer->overlay_center)) | |
2454 | { | |
2455 | *pafter = *ptail; | |
2456 | pafter = &XCONS (*ptail)->cdr; | |
2457 | } | |
2458 | else | |
2459 | { | |
2460 | *pbefore = *ptail; | |
2461 | pbefore = &XCONS (*ptail)->cdr; | |
2462 | } | |
2463 | *ptail = XCONS (*ptail)->cdr; | |
2464 | } | |
2465 | else | |
2466 | ptail = &XCONS (*ptail)->cdr; | |
2467 | } | |
2468 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2469 | { | |
2470 | overlay = XCONS (*ptail)->car; | |
2471 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2472 | if (startpos >= end) | |
2473 | break; | |
2474 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2475 | if (startpos >= start | |
2476 | || (endpos >= start && endpos < end)) | |
2477 | { | |
2478 | if (startpos > endpos) | |
2479 | { | |
2480 | int tem; | |
2481 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2482 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2483 | tem = startpos; startpos = endpos; endpos = tem; | |
2484 | } | |
2485 | if (endpos < XINT (current_buffer->overlay_center)) | |
2486 | { | |
2487 | *pafter = *ptail; | |
2488 | pafter = &XCONS (*ptail)->cdr; | |
2489 | } | |
2490 | else | |
2491 | { | |
2492 | *pbefore = *ptail; | |
2493 | pbefore = &XCONS (*ptail)->cdr; | |
2494 | } | |
2495 | *ptail = XCONS (*ptail)->cdr; | |
2496 | } | |
2497 | else | |
2498 | ptail = &XCONS (*ptail)->cdr; | |
2499 | } | |
2500 | ||
2501 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2502 | and let the recenter function make it sane again. */ | |
2503 | *pbefore = current_buffer->overlays_before; | |
2504 | current_buffer->overlays_before = before_list; | |
2505 | recenter_overlay_lists (current_buffer, | |
2506 | XINT (current_buffer->overlay_center)); | |
2507 | ||
2508 | *pafter = current_buffer->overlays_after; | |
2509 | current_buffer->overlays_after = after_list; | |
2510 | recenter_overlay_lists (current_buffer, | |
2511 | XINT (current_buffer->overlay_center)); | |
2512 | } | |
2eec3b4e | 2513 | \f |
52f8ec73 JB |
2514 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
2515 | "Return t if OBJECT is an overlay.") | |
2516 | (object) | |
2517 | Lisp_Object object; | |
2518 | { | |
2519 | return (OVERLAYP (object) ? Qt : Qnil); | |
2520 | } | |
2521 | ||
acac2700 | 2522 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
2523 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
2524 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
2525 | BEG and END may be integers or markers.\n\ |
2526 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
2527 | front delimiter advance when text is inserted there.\n\ | |
2528 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
2529 | rear delimiter advance when text is inserted there.") | |
2530 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 2531 | Lisp_Object beg, end, buffer; |
acac2700 | 2532 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
2533 | { |
2534 | Lisp_Object overlay; | |
5c4f68f1 | 2535 | struct buffer *b; |
2eec3b4e | 2536 | |
5c4f68f1 | 2537 | if (NILP (buffer)) |
67180c6a | 2538 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
2539 | else |
2540 | CHECK_BUFFER (buffer, 2); | |
2541 | if (MARKERP (beg) | |
2542 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2543 | error ("Marker points into wrong buffer"); | |
2544 | if (MARKERP (end) | |
2545 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2546 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 2547 | |
883047b9 JB |
2548 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2549 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2550 | |
883047b9 | 2551 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2552 | { |
c99fc30f KH |
2553 | Lisp_Object temp; |
2554 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2555 | } |
883047b9 JB |
2556 | |
2557 | b = XBUFFER (buffer); | |
2558 | ||
2559 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2560 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2561 | |
acac2700 RS |
2562 | if (!NILP (front_advance)) |
2563 | XMARKER (beg)->insertion_type = 1; | |
2564 | if (!NILP (rear_advance)) | |
2565 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 2566 | |
48e2e3ba | 2567 | overlay = allocate_misc (); |
89ca3e1b | 2568 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
2569 | XOVERLAY (overlay)->start = beg; |
2570 | XOVERLAY (overlay)->end = end; | |
2571 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2572 | |
2573 | /* Put the new overlay on the wrong list. */ | |
2574 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2575 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2576 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2577 | else |
5c4f68f1 | 2578 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2579 | |
2580 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2581 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2582 | |
b61982dd JB |
2583 | /* We don't need to redisplay the region covered by the overlay, because |
2584 | the overlay has no properties at the moment. */ | |
2585 | ||
2eec3b4e RS |
2586 | return overlay; |
2587 | } | |
876aa27c RS |
2588 | \f |
2589 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
2590 | ||
2591 | static void | |
2592 | modify_overlay (buf, start, end) | |
2593 | struct buffer *buf; | |
2594 | int start, end; | |
2595 | { | |
2596 | if (start == end) | |
2597 | return; | |
2598 | ||
2599 | if (start > end) | |
2600 | { | |
2601 | int temp = start; | |
2602 | start = end; end = temp; | |
2603 | } | |
2604 | ||
2605 | /* If this is a buffer not in the selected window, | |
2606 | we must do other windows. */ | |
2607 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
2608 | windows_or_buffers_changed = 1; | |
2609 | /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */ | |
2610 | else if (buf != current_buffer) | |
2611 | windows_or_buffers_changed = 1; | |
2612 | /* If multiple windows show this buffer, we must do other windows. */ | |
2613 | else if (buffer_shared > 1) | |
2614 | windows_or_buffers_changed = 1; | |
2615 | else | |
2616 | { | |
2617 | if (unchanged_modified == MODIFF | |
2618 | && overlay_unchanged_modified == OVERLAY_MODIFF) | |
2619 | { | |
2620 | beg_unchanged = start - BEG; | |
2621 | end_unchanged = Z - end; | |
2622 | } | |
2623 | else | |
2624 | { | |
2625 | if (Z - end < end_unchanged) | |
2626 | end_unchanged = Z - end; | |
2627 | if (start - BEG < beg_unchanged) | |
2628 | beg_unchanged = start - BEG; | |
2629 | } | |
2630 | } | |
2631 | ||
2632 | ++OVERLAY_MODIFF; | |
2633 | } | |
2eec3b4e | 2634 | |
876aa27c | 2635 | \f\f |
5c4f68f1 JB |
2636 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2637 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2638 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2639 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2640 | buffer.") | |
5c4f68f1 JB |
2641 | (overlay, beg, end, buffer) |
2642 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2643 | { |
0a4469c9 RS |
2644 | struct buffer *b, *ob; |
2645 | Lisp_Object obuffer; | |
2646 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2647 | |
52f8ec73 | 2648 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2649 | if (NILP (buffer)) |
2650 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2651 | if (NILP (buffer)) |
67180c6a | 2652 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2653 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2654 | |
2655 | if (MARKERP (beg) | |
2656 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2657 | error ("Marker points into wrong buffer"); | |
2658 | if (MARKERP (end) | |
2659 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2660 | error ("Marker points into wrong buffer"); | |
2661 | ||
b61982dd JB |
2662 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2663 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2664 | ||
9d7608b7 KH |
2665 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2666 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2667 | |
b61982dd JB |
2668 | if (XINT (beg) > XINT (end)) |
2669 | { | |
c99fc30f KH |
2670 | Lisp_Object temp; |
2671 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2672 | } |
2673 | ||
9d7608b7 KH |
2674 | specbind (Qinhibit_quit, Qt); |
2675 | ||
0a4469c9 | 2676 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2677 | b = XBUFFER (buffer); |
0a4469c9 | 2678 | ob = XBUFFER (obuffer); |
2eec3b4e | 2679 | |
c82ed728 | 2680 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2681 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2682 | { |
2683 | /* Redisplay where the overlay was. */ | |
2684 | if (!NILP (obuffer)) | |
2685 | { | |
2686 | Lisp_Object o_beg; | |
2687 | Lisp_Object o_end; | |
2688 | ||
2689 | o_beg = OVERLAY_START (overlay); | |
2690 | o_end = OVERLAY_END (overlay); | |
2691 | o_beg = OVERLAY_POSITION (o_beg); | |
2692 | o_end = OVERLAY_POSITION (o_end); | |
2693 | ||
876aa27c | 2694 | modify_overlay (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2695 | } |
2696 | ||
2697 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 2698 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 2699 | } |
c82ed728 JB |
2700 | else |
2701 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2702 | { | |
be8b1c6b RS |
2703 | Lisp_Object o_beg; |
2704 | Lisp_Object o_end; | |
c82ed728 JB |
2705 | int change_beg, change_end; |
2706 | ||
be8b1c6b RS |
2707 | o_beg = OVERLAY_START (overlay); |
2708 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
2709 | o_beg = OVERLAY_POSITION (o_beg); |
2710 | o_end = OVERLAY_POSITION (o_end); | |
2711 | ||
2712 | if (XINT (o_beg) == XINT (beg)) | |
876aa27c | 2713 | modify_overlay (b, XINT (o_end), XINT (end)); |
c82ed728 | 2714 | else if (XINT (o_end) == XINT (end)) |
876aa27c | 2715 | modify_overlay (b, XINT (o_beg), XINT (beg)); |
c82ed728 JB |
2716 | else |
2717 | { | |
2718 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2719 | if (XINT (end) > XINT (o_end)) o_end = end; | |
876aa27c | 2720 | modify_overlay (b, XINT (o_beg), XINT (o_end)); |
c82ed728 JB |
2721 | } |
2722 | } | |
b61982dd | 2723 | |
0a4469c9 RS |
2724 | if (!NILP (obuffer)) |
2725 | { | |
2726 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2727 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2728 | } | |
5c4f68f1 JB |
2729 | |
2730 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2731 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2732 | |
2733 | /* Put the overlay on the wrong list. */ | |
2734 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2735 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2736 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2737 | else |
5c4f68f1 | 2738 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2739 | |
2740 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2741 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2742 | |
0a4469c9 | 2743 | return unbind_to (count, overlay); |
2eec3b4e RS |
2744 | } |
2745 | ||
2746 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2747 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2748 | (overlay) |
5c4f68f1 | 2749 | Lisp_Object overlay; |
2eec3b4e | 2750 | { |
0a4469c9 | 2751 | Lisp_Object buffer; |
5c4f68f1 | 2752 | struct buffer *b; |
0a4469c9 | 2753 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2754 | |
52f8ec73 JB |
2755 | CHECK_OVERLAY (overlay, 0); |
2756 | ||
0a4469c9 RS |
2757 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2758 | if (NILP (buffer)) | |
2759 | return Qnil; | |
2760 | ||
2761 | b = XBUFFER (buffer); | |
2762 | ||
2763 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2764 | |
2765 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2766 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2767 | ||
876aa27c | 2768 | modify_overlay (b, |
a927f5c9 RS |
2769 | marker_position (OVERLAY_START (overlay)), |
2770 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2771 | |
3ece337a JB |
2772 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2773 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2774 | ||
0a4469c9 | 2775 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2776 | } |
2777 | \f | |
8ebafa8d JB |
2778 | /* Overlay dissection functions. */ |
2779 | ||
2780 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2781 | "Return the position at which OVERLAY starts.") | |
2782 | (overlay) | |
2783 | Lisp_Object overlay; | |
2784 | { | |
2785 | CHECK_OVERLAY (overlay, 0); | |
2786 | ||
2787 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2788 | } | |
2789 | ||
2790 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2791 | "Return the position at which OVERLAY ends.") | |
2792 | (overlay) | |
2793 | Lisp_Object overlay; | |
2794 | { | |
2795 | CHECK_OVERLAY (overlay, 0); | |
2796 | ||
2797 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2798 | } | |
2799 | ||
2800 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2801 | "Return the buffer OVERLAY belongs to.") | |
2802 | (overlay) | |
2803 | Lisp_Object overlay; | |
2804 | { | |
2805 | CHECK_OVERLAY (overlay, 0); | |
2806 | ||
2807 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2808 | } | |
2809 | ||
2810 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2811 | "Return a list of the properties on OVERLAY.\n\ | |
2812 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2813 | OVERLAY.") | |
2814 | (overlay) | |
2815 | Lisp_Object overlay; | |
2816 | { | |
2817 | CHECK_OVERLAY (overlay, 0); | |
2818 | ||
48e2e3ba | 2819 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2820 | } |
2821 | ||
2822 | \f | |
2eec3b4e | 2823 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2824 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2825 | (pos) |
2826 | Lisp_Object pos; | |
2827 | { | |
2828 | int noverlays; | |
2eec3b4e RS |
2829 | Lisp_Object *overlay_vec; |
2830 | int len; | |
2831 | Lisp_Object result; | |
2832 | ||
2833 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2834 | ||
2835 | len = 10; | |
2836 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2837 | ||
2838 | /* Put all the overlays we want in a vector in overlay_vec. | |
2839 | Store the length in len. */ | |
2a77a7d7 RS |
2840 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2841 | (int *) 0, (int *) 0); | |
2eec3b4e RS |
2842 | |
2843 | /* Make a list of them all. */ | |
2844 | result = Flist (noverlays, overlay_vec); | |
2845 | ||
9ac0d9e0 | 2846 | xfree (overlay_vec); |
2eec3b4e RS |
2847 | return result; |
2848 | } | |
2849 | ||
74514898 | 2850 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
2851 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
2852 | Overlap means that at least one character is contained within the overlay\n\ | |
2853 | and also contained within the specified region.\n\ | |
2854 | Empty overlays are included in the result if they are located at BEG\n\ | |
2855 | or between BEG and END.") | |
74514898 RS |
2856 | (beg, end) |
2857 | Lisp_Object beg, end; | |
2858 | { | |
2859 | int noverlays; | |
2860 | Lisp_Object *overlay_vec; | |
2861 | int len; | |
2862 | Lisp_Object result; | |
2863 | ||
2864 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
2865 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
2866 | ||
2867 | len = 10; | |
2868 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2869 | ||
2870 | /* Put all the overlays we want in a vector in overlay_vec. | |
2871 | Store the length in len. */ | |
2872 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
2873 | (int *) 0, (int *) 0); | |
2874 | ||
2875 | /* Make a list of them all. */ | |
2876 | result = Flist (noverlays, overlay_vec); | |
2877 | ||
2878 | xfree (overlay_vec); | |
2879 | return result; | |
2880 | } | |
2881 | ||
2eec3b4e RS |
2882 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
2883 | 1, 1, 0, | |
bbe20e81 KH |
2884 | "Return the next position after POS where an overlay starts or ends.\n\ |
2885 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2886 | (pos) |
2887 | Lisp_Object pos; | |
2888 | { | |
2889 | int noverlays; | |
2890 | int endpos; | |
2891 | Lisp_Object *overlay_vec; | |
2892 | int len; | |
2eec3b4e RS |
2893 | int i; |
2894 | ||
2895 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2896 | ||
2897 | len = 10; | |
2898 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2899 | ||
2900 | /* Put all the overlays we want in a vector in overlay_vec. | |
2901 | Store the length in len. | |
2902 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 RS |
2903 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2904 | &endpos, (int *) 0); | |
2eec3b4e RS |
2905 | |
2906 | /* If any of these overlays ends before endpos, | |
2907 | use its ending point instead. */ | |
2908 | for (i = 0; i < noverlays; i++) | |
2909 | { | |
2910 | Lisp_Object oend; | |
2911 | int oendpos; | |
2912 | ||
2913 | oend = OVERLAY_END (overlay_vec[i]); | |
2914 | oendpos = OVERLAY_POSITION (oend); | |
2915 | if (oendpos < endpos) | |
2916 | endpos = oendpos; | |
1ab256cb RM |
2917 | } |
2918 | ||
9ac0d9e0 | 2919 | xfree (overlay_vec); |
2eec3b4e RS |
2920 | return make_number (endpos); |
2921 | } | |
239c932b RS |
2922 | |
2923 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2924 | Sprevious_overlay_change, 1, 1, 0, | |
2925 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 2926 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
2927 | (pos) |
2928 | Lisp_Object pos; | |
2929 | { | |
2930 | int noverlays; | |
2931 | int prevpos; | |
2932 | Lisp_Object *overlay_vec; | |
2933 | int len; | |
2934 | int i; | |
624bbdc4 | 2935 | Lisp_Object tail; |
239c932b RS |
2936 | |
2937 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2938 | ||
2939 | len = 10; | |
2940 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2941 | ||
624bbdc4 RS |
2942 | /* At beginning of buffer, we know the answer; |
2943 | avoid bug subtracting 1 below. */ | |
2944 | if (XINT (pos) == BEGV) | |
2945 | return pos; | |
2946 | ||
239c932b RS |
2947 | /* Put all the overlays we want in a vector in overlay_vec. |
2948 | Store the length in len. | |
2949 | prevpos gets the position of an overlay end. */ | |
2a77a7d7 RS |
2950 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2951 | (int *) 0, &prevpos); | |
239c932b | 2952 | |
624bbdc4 | 2953 | /* If any of these overlays starts after prevpos, |
239c932b RS |
2954 | maybe use its starting point instead. */ |
2955 | for (i = 0; i < noverlays; i++) | |
2956 | { | |
2957 | Lisp_Object ostart; | |
2958 | int ostartpos; | |
2959 | ||
2960 | ostart = OVERLAY_START (overlay_vec[i]); | |
2961 | ostartpos = OVERLAY_POSITION (ostart); | |
2962 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2963 | prevpos = ostartpos; | |
2964 | } | |
2965 | ||
624bbdc4 RS |
2966 | /* If any overlay ends at pos, consider its starting point too. */ |
2967 | for (tail = current_buffer->overlays_before; | |
2968 | GC_CONSP (tail); | |
2969 | tail = XCONS (tail)->cdr) | |
2970 | { | |
2971 | Lisp_Object overlay, ostart; | |
2972 | int ostartpos; | |
2973 | ||
2974 | overlay = XCONS (tail)->car; | |
2975 | ||
2976 | ostart = OVERLAY_START (overlay); | |
2977 | ostartpos = OVERLAY_POSITION (ostart); | |
2978 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2979 | prevpos = ostartpos; | |
2980 | } | |
2981 | ||
239c932b RS |
2982 | xfree (overlay_vec); |
2983 | return make_number (prevpos); | |
2984 | } | |
2eec3b4e RS |
2985 | \f |
2986 | /* These functions are for debugging overlays. */ | |
2987 | ||
2988 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2989 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2990 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2991 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2992 | Recentering overlays moves overlays between these lists.\n\ |
2993 | The lists you get are copies, so that changing them has no effect.\n\ | |
2994 | However, the overlays you get are the real objects that the buffer uses.") | |
2995 | () | |
2996 | { | |
2997 | Lisp_Object before, after; | |
2998 | before = current_buffer->overlays_before; | |
2999 | if (CONSP (before)) | |
3000 | before = Fcopy_sequence (before); | |
3001 | after = current_buffer->overlays_after; | |
3002 | if (CONSP (after)) | |
3003 | after = Fcopy_sequence (after); | |
3004 | ||
3005 | return Fcons (before, after); | |
3006 | } | |
3007 | ||
3008 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3009 | "Recenter the overlays of the current buffer around position POS.") | |
3010 | (pos) | |
3011 | Lisp_Object pos; | |
3012 | { | |
3013 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3014 | ||
5c4f68f1 | 3015 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3016 | return Qnil; |
3017 | } | |
3018 | \f | |
3019 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3020 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3021 | (overlay, prop) |
3022 | Lisp_Object overlay, prop; | |
3023 | { | |
cab4777e | 3024 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3025 | |
3026 | CHECK_OVERLAY (overlay, 0); | |
3027 | ||
cab4777e RS |
3028 | fallback = Qnil; |
3029 | ||
48e2e3ba | 3030 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3031 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
3032 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
3033 | { | |
3034 | if (EQ (XCONS (plist)->car, prop)) | |
3035 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
3036 | else if (EQ (XCONS (plist)->car, Qcategory)) |
3037 | { | |
3038 | Lisp_Object tem; | |
3039 | tem = Fcar (Fcdr (plist)); | |
3040 | if (SYMBOLP (tem)) | |
3041 | fallback = Fget (tem, prop); | |
3042 | } | |
2eec3b4e | 3043 | } |
52f8ec73 | 3044 | |
cab4777e | 3045 | return fallback; |
2eec3b4e RS |
3046 | } |
3047 | ||
3048 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3049 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3050 | (overlay, prop, value) | |
3051 | Lisp_Object overlay, prop, value; | |
3052 | { | |
48e2e3ba | 3053 | Lisp_Object tail, buffer; |
9d7608b7 | 3054 | int changed; |
2eec3b4e | 3055 | |
52f8ec73 | 3056 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3057 | |
274a9425 RS |
3058 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3059 | ||
48e2e3ba | 3060 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3061 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
3062 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
3063 | if (EQ (XCONS (tail)->car, prop)) |
3064 | { | |
9d7608b7 KH |
3065 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
3066 | XCONS (XCONS (tail)->cdr)->car = value; | |
3067 | goto found; | |
274a9425 | 3068 | } |
9d7608b7 KH |
3069 | /* It wasn't in the list, so add it to the front. */ |
3070 | changed = !NILP (value); | |
48e2e3ba KH |
3071 | XOVERLAY (overlay)->plist |
3072 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3073 | found: |
3074 | if (! NILP (buffer)) | |
3075 | { | |
3076 | if (changed) | |
876aa27c | 3077 | modify_overlay (XBUFFER (buffer), |
9d7608b7 KH |
3078 | marker_position (OVERLAY_START (overlay)), |
3079 | marker_position (OVERLAY_END (overlay))); | |
3080 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3081 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3082 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3083 | Fdelete_overlay (overlay); | |
3084 | } | |
2eec3b4e | 3085 | return value; |
1ab256cb RM |
3086 | } |
3087 | \f | |
9115729e KH |
3088 | /* Subroutine of report_overlay_modification. */ |
3089 | ||
3090 | /* Lisp vector holding overlay hook functions to call. | |
3091 | Vector elements come in pairs. | |
3092 | Each even-index element is a list of hook functions. | |
3093 | The following odd-index element is the overlay they came from. | |
3094 | ||
3095 | Before the buffer change, we fill in this vector | |
3096 | as we call overlay hook functions. | |
3097 | After the buffer change, we get the functions to call from this vector. | |
3098 | This way we always call the same functions before and after the change. */ | |
3099 | static Lisp_Object last_overlay_modification_hooks; | |
3100 | ||
3101 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3102 | static int last_overlay_modification_hooks_used; | |
3103 | ||
3104 | /* Add one functionlist/overlay pair | |
3105 | to the end of last_overlay_modification_hooks. */ | |
3106 | ||
3107 | static void | |
3108 | add_overlay_mod_hooklist (functionlist, overlay) | |
3109 | Lisp_Object functionlist, overlay; | |
3110 | { | |
3111 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3112 | ||
3113 | if (last_overlay_modification_hooks_used == oldsize) | |
3114 | { | |
3115 | Lisp_Object old; | |
3116 | old = last_overlay_modification_hooks; | |
3117 | last_overlay_modification_hooks | |
3118 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3119 | bcopy (XVECTOR (old)->contents, |
3120 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3121 | sizeof (Lisp_Object) * oldsize); |
3122 | } | |
3123 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3124 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3125 | } | |
3126 | \f | |
173f2a64 RS |
3127 | /* Run the modification-hooks of overlays that include |
3128 | any part of the text in START to END. | |
9115729e KH |
3129 | If this change is an insertion, also |
3130 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3131 | and the insert-after-hooks of overlay ending at START. |
3132 | ||
3133 | This is called both before and after the modification. | |
3134 | AFTER is nonzero when we call after the modification. | |
3135 | ||
9115729e KH |
3136 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3137 | When AFTER is nonzero, they are the start position, | |
3138 | the position after the inserted new text, | |
3139 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3140 | |
3141 | void | |
930a9140 | 3142 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3143 | Lisp_Object start, end; |
930a9140 RS |
3144 | int after; |
3145 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3146 | { |
3147 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3148 | /* 1 if this change is an insertion. */ |
3149 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3150 | int tail_copied; |
930a9140 | 3151 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3152 | |
3153 | overlay = Qnil; | |
3154 | tail = Qnil; | |
930a9140 | 3155 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3156 | |
9115729e KH |
3157 | if (after) |
3158 | { | |
3159 | /* Call the functions recorded in last_overlay_modification_hooks | |
3160 | rather than scanning the overlays again. | |
3161 | First copy the vector contents, in case some of these hooks | |
3162 | do subsequent modification of the buffer. */ | |
3163 | int size = last_overlay_modification_hooks_used; | |
3164 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3165 | int i; | |
3166 | ||
3167 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3168 | copy, size * sizeof (Lisp_Object)); | |
3169 | gcpro1.var = copy; | |
3170 | gcpro1.nvars = size; | |
3171 | ||
3172 | for (i = 0; i < size;) | |
3173 | { | |
3174 | Lisp_Object prop, overlay; | |
3175 | prop = copy[i++]; | |
3176 | overlay = copy[i++]; | |
3177 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3178 | } | |
3179 | UNGCPRO; | |
3180 | return; | |
3181 | } | |
3182 | ||
3183 | /* We are being called before a change. | |
3184 | Scan the overlays to find the functions to call. */ | |
3185 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3186 | tail_copied = 0; |
173f2a64 RS |
3187 | for (tail = current_buffer->overlays_before; |
3188 | CONSP (tail); | |
3189 | tail = XCONS (tail)->cdr) | |
3190 | { | |
3191 | int startpos, endpos; | |
be8b1c6b | 3192 | Lisp_Object ostart, oend; |
173f2a64 RS |
3193 | |
3194 | overlay = XCONS (tail)->car; | |
3195 | ||
3196 | ostart = OVERLAY_START (overlay); | |
3197 | oend = OVERLAY_END (overlay); | |
3198 | endpos = OVERLAY_POSITION (oend); | |
3199 | if (XFASTINT (start) > endpos) | |
3200 | break; | |
3201 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3202 | if (insertion && (XFASTINT (start) == startpos |
3203 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3204 | { |
3205 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3206 | if (!NILP (prop)) |
3207 | { | |
3208 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3209 | if (!tail_copied) |
3210 | tail = Fcopy_sequence (tail); | |
3211 | tail_copied = 1; | |
930a9140 | 3212 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3213 | } |
173f2a64 | 3214 | } |
9115729e KH |
3215 | if (insertion && (XFASTINT (start) == endpos |
3216 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3217 | { |
3218 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3219 | if (!NILP (prop)) |
3220 | { | |
55b48893 RS |
3221 | if (!tail_copied) |
3222 | tail = Fcopy_sequence (tail); | |
3223 | tail_copied = 1; | |
930a9140 | 3224 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3225 | } |
173f2a64 | 3226 | } |
3bd13e92 KH |
3227 | /* Test for intersecting intervals. This does the right thing |
3228 | for both insertion and deletion. */ | |
3229 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3230 | { |
3231 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3232 | if (!NILP (prop)) |
3233 | { | |
55b48893 RS |
3234 | if (!tail_copied) |
3235 | tail = Fcopy_sequence (tail); | |
3236 | tail_copied = 1; | |
930a9140 | 3237 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3238 | } |
173f2a64 RS |
3239 | } |
3240 | } | |
3241 | ||
55b48893 | 3242 | tail_copied = 0; |
173f2a64 RS |
3243 | for (tail = current_buffer->overlays_after; |
3244 | CONSP (tail); | |
3245 | tail = XCONS (tail)->cdr) | |
3246 | { | |
3247 | int startpos, endpos; | |
be8b1c6b | 3248 | Lisp_Object ostart, oend; |
173f2a64 RS |
3249 | |
3250 | overlay = XCONS (tail)->car; | |
3251 | ||
3252 | ostart = OVERLAY_START (overlay); | |
3253 | oend = OVERLAY_END (overlay); | |
3254 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3255 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3256 | if (XFASTINT (end) < startpos) |
3257 | break; | |
9115729e KH |
3258 | if (insertion && (XFASTINT (start) == startpos |
3259 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3260 | { |
3261 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3262 | if (!NILP (prop)) |
3263 | { | |
55b48893 RS |
3264 | if (!tail_copied) |
3265 | tail = Fcopy_sequence (tail); | |
3266 | tail_copied = 1; | |
930a9140 | 3267 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3268 | } |
173f2a64 | 3269 | } |
9115729e KH |
3270 | if (insertion && (XFASTINT (start) == endpos |
3271 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3272 | { |
3273 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3274 | if (!NILP (prop)) |
3275 | { | |
55b48893 RS |
3276 | if (!tail_copied) |
3277 | tail = Fcopy_sequence (tail); | |
3278 | tail_copied = 1; | |
930a9140 | 3279 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3280 | } |
173f2a64 | 3281 | } |
3bd13e92 KH |
3282 | /* Test for intersecting intervals. This does the right thing |
3283 | for both insertion and deletion. */ | |
3284 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3285 | { |
3286 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3287 | if (!NILP (prop)) |
3288 | { | |
55b48893 RS |
3289 | if (!tail_copied) |
3290 | tail = Fcopy_sequence (tail); | |
3291 | tail_copied = 1; | |
930a9140 | 3292 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3293 | } |
173f2a64 RS |
3294 | } |
3295 | } | |
55b48893 RS |
3296 | |
3297 | UNGCPRO; | |
173f2a64 RS |
3298 | } |
3299 | ||
3300 | static void | |
930a9140 RS |
3301 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3302 | Lisp_Object list, overlay; | |
3303 | int after; | |
3304 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3305 | { |
930a9140 | 3306 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3307 | |
930a9140 | 3308 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3309 | if (! after) |
3310 | add_overlay_mod_hooklist (list, overlay); | |
3311 | ||
173f2a64 RS |
3312 | while (!NILP (list)) |
3313 | { | |
930a9140 RS |
3314 | if (NILP (arg3)) |
3315 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3316 | else | |
3317 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3318 | list = Fcdr (list); |
3319 | } | |
3320 | UNGCPRO; | |
3321 | } | |
9d7608b7 KH |
3322 | |
3323 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3324 | property is set. */ | |
3325 | void | |
3326 | evaporate_overlays (pos) | |
3327 | int pos; | |
3328 | { | |
3329 | Lisp_Object tail, overlay, hit_list; | |
3330 | ||
3331 | hit_list = Qnil; | |
3332 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
3333 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
3334 | tail = XCONS (tail)->cdr) | |
3335 | { | |
3336 | int endpos; | |
3337 | overlay = XCONS (tail)->car; | |
3338 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3339 | if (endpos < pos) | |
3340 | break; | |
3341 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 3342 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3343 | hit_list = Fcons (overlay, hit_list); |
3344 | } | |
3345 | else | |
3346 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
3347 | tail = XCONS (tail)->cdr) | |
3348 | { | |
3349 | int startpos; | |
889bf329 | 3350 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
3351 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3352 | if (startpos > pos) | |
3353 | break; | |
3354 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 3355 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3356 | hit_list = Fcons (overlay, hit_list); |
3357 | } | |
3358 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
3359 | Fdelete_overlay (XCONS (hit_list)->car); | |
3360 | } | |
173f2a64 | 3361 | \f |
54dfdeb0 KH |
3362 | /* Somebody has tried to store a value with an unacceptable type |
3363 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 3364 | void |
54dfdeb0 KH |
3365 | buffer_slot_type_mismatch (offset) |
3366 | int offset; | |
0fa3ba92 | 3367 | { |
54dfdeb0 | 3368 | Lisp_Object sym; |
0fa3ba92 | 3369 | char *type_name; |
54dfdeb0 | 3370 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
3371 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
3372 | { | |
3373 | case Lisp_Int: type_name = "integers"; break; | |
3374 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 3375 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
3376 | default: |
3377 | abort (); | |
3378 | } | |
3379 | ||
3380 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 3381 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
3382 | } |
3383 | \f | |
1ab256cb RM |
3384 | init_buffer_once () |
3385 | { | |
3386 | register Lisp_Object tem; | |
3387 | ||
13de9290 RS |
3388 | buffer_permanent_local_flags = 0; |
3389 | ||
1ab256cb RM |
3390 | /* Make sure all markable slots in buffer_defaults |
3391 | are initialized reasonably, so mark_buffer won't choke. */ | |
3392 | reset_buffer (&buffer_defaults); | |
13de9290 | 3393 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 3394 | reset_buffer (&buffer_local_symbols); |
13de9290 | 3395 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
3396 | /* Prevent GC from getting confused. */ |
3397 | buffer_defaults.text = &buffer_defaults.own_text; | |
3398 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
3399 | #ifdef USE_TEXT_PROPERTIES | |
3400 | BUF_INTERVALS (&buffer_defaults) = 0; | |
3401 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3402 | #endif | |
67180c6a KH |
3403 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3404 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
3405 | |
3406 | /* Set up the default values of various buffer slots. */ | |
3407 | /* Must do these before making the first buffer! */ | |
3408 | ||
3409 | /* real setup is done in loaddefs.el */ | |
3410 | buffer_defaults.mode_line_format = build_string ("%-"); | |
3411 | buffer_defaults.abbrev_mode = Qnil; | |
3412 | buffer_defaults.overwrite_mode = Qnil; | |
3413 | buffer_defaults.case_fold_search = Qt; | |
3414 | buffer_defaults.auto_fill_function = Qnil; | |
3415 | buffer_defaults.selective_display = Qnil; | |
3416 | #ifndef old | |
3417 | buffer_defaults.selective_display_ellipses = Qt; | |
3418 | #endif | |
3419 | buffer_defaults.abbrev_table = Qnil; | |
3420 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 3421 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 3422 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 3423 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
3424 | buffer_defaults.overlays_before = Qnil; |
3425 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 3426 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 3427 | |
8d7a4592 | 3428 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
3429 | buffer_defaults.truncate_lines = Qnil; |
3430 | buffer_defaults.ctl_arrow = Qt; | |
3431 | ||
f7975d07 | 3432 | #ifdef DOS_NT |
0776cb1b | 3433 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 3434 | #endif |
8d7a4592 KH |
3435 | XSETFASTINT (buffer_defaults.fill_column, 70); |
3436 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 3437 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 3438 | buffer_defaults.file_truename = Qnil; |
1ab256cb RM |
3439 | |
3440 | /* Assign the local-flags to the slots that have default values. | |
3441 | The local flag is a bit that is used in the buffer | |
3442 | to say that it has its own local value for the slot. | |
3443 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
3444 | ||
3445 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 3446 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
3447 | |
3448 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
3449 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
3450 | XSETINT (buffer_local_flags.filename, -1); |
3451 | XSETINT (buffer_local_flags.directory, -1); | |
3452 | XSETINT (buffer_local_flags.backed_up, -1); | |
3453 | XSETINT (buffer_local_flags.save_length, -1); | |
3454 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
3455 | XSETINT (buffer_local_flags.read_only, -1); | |
3456 | XSETINT (buffer_local_flags.major_mode, -1); | |
3457 | XSETINT (buffer_local_flags.mode_name, -1); | |
3458 | XSETINT (buffer_local_flags.undo_list, -1); | |
3459 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 3460 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 3461 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 3462 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 3463 | XSETINT (buffer_local_flags.file_format, -1); |
8d7a4592 KH |
3464 | |
3465 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
3466 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
3467 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
3468 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
3469 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
3470 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 3471 | #ifndef old |
8d7a4592 | 3472 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 3473 | #endif |
8d7a4592 KH |
3474 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
3475 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
3476 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
3477 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
3478 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
3479 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
3480 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
f7975d07 | 3481 | #ifdef DOS_NT |
8d7a4592 | 3482 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
13de9290 RS |
3483 | /* Make this one a permanent local. */ |
3484 | buffer_permanent_local_flags |= 0x4000; | |
54ad07d3 | 3485 | #endif |
2e716096 RS |
3486 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
3487 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); | |
13de9290 | 3488 | |
1ab256cb RM |
3489 | Vbuffer_alist = Qnil; |
3490 | current_buffer = 0; | |
3491 | all_buffers = 0; | |
3492 | ||
3493 | QSFundamental = build_string ("Fundamental"); | |
3494 | ||
3495 | Qfundamental_mode = intern ("fundamental-mode"); | |
3496 | buffer_defaults.major_mode = Qfundamental_mode; | |
3497 | ||
3498 | Qmode_class = intern ("mode-class"); | |
3499 | ||
3500 | Qprotected_field = intern ("protected-field"); | |
3501 | ||
3502 | Qpermanent_local = intern ("permanent-local"); | |
3503 | ||
3504 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
3505 | ||
3506 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 3507 | |
1ab256cb RM |
3508 | /* super-magic invisible buffer */ |
3509 | Vbuffer_alist = Qnil; | |
3510 | ||
ffd56f97 | 3511 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
3512 | } |
3513 | ||
3514 | init_buffer () | |
3515 | { | |
3516 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
3517 | char *pwd; |
3518 | struct stat dotstat, pwdstat; | |
136351b7 | 3519 | Lisp_Object temp; |
f7975d07 | 3520 | int rc; |
1ab256cb RM |
3521 | |
3522 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
3523 | |
3524 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
3525 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 3526 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
3527 | && stat (pwd, &pwdstat) == 0 |
3528 | && stat (".", &dotstat) == 0 | |
3529 | && dotstat.st_ino == pwdstat.st_ino | |
3530 | && dotstat.st_dev == pwdstat.st_dev | |
3531 | && strlen (pwd) < MAXPATHLEN) | |
3532 | strcpy (buf, pwd); | |
3533 | else if (getwd (buf) == 0) | |
cf1e6391 | 3534 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
3535 | |
3536 | #ifndef VMS | |
3537 | /* Maybe this should really use some standard subroutine | |
3538 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
3539 | rc = strlen (buf); |
3540 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
3541 | { | |
3542 | buf[rc] = DIRECTORY_SEP; | |
3543 | buf[rc + 1] = '\0'; | |
3544 | } | |
1ab256cb RM |
3545 | #endif /* not VMS */ |
3546 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
3547 | |
3548 | temp = get_minibuffer (0); | |
3549 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
3550 | } |
3551 | ||
3552 | /* initialize the buffer routines */ | |
3553 | syms_of_buffer () | |
3554 | { | |
188d4d11 RM |
3555 | extern Lisp_Object Qdisabled; |
3556 | ||
9115729e KH |
3557 | staticpro (&last_overlay_modification_hooks); |
3558 | last_overlay_modification_hooks | |
3559 | = Fmake_vector (make_number (10), Qnil); | |
3560 | ||
1ab256cb RM |
3561 | staticpro (&Vbuffer_defaults); |
3562 | staticpro (&Vbuffer_local_symbols); | |
3563 | staticpro (&Qfundamental_mode); | |
3564 | staticpro (&Qmode_class); | |
3565 | staticpro (&QSFundamental); | |
3566 | staticpro (&Vbuffer_alist); | |
3567 | staticpro (&Qprotected_field); | |
3568 | staticpro (&Qpermanent_local); | |
3569 | staticpro (&Qkill_buffer_hook); | |
22378665 | 3570 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 3571 | staticpro (&Qoverlayp); |
9d7608b7 KH |
3572 | Qevaporate = intern ("evaporate"); |
3573 | staticpro (&Qevaporate); | |
294d215f | 3574 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 3575 | staticpro (&Qmodification_hooks); |
294d215f | 3576 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 3577 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 3578 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 3579 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 3580 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 3581 | staticpro (&Qget_file_buffer); |
5985d248 KH |
3582 | Qpriority = intern ("priority"); |
3583 | staticpro (&Qpriority); | |
3584 | Qwindow = intern ("window"); | |
3585 | staticpro (&Qwindow); | |
bbbe9545 KH |
3586 | Qbefore_string = intern ("before-string"); |
3587 | staticpro (&Qbefore_string); | |
3588 | Qafter_string = intern ("after-string"); | |
3589 | staticpro (&Qafter_string); | |
22378665 RS |
3590 | Qfirst_change_hook = intern ("first-change-hook"); |
3591 | staticpro (&Qfirst_change_hook); | |
3592 | Qbefore_change_functions = intern ("before-change-functions"); | |
3593 | staticpro (&Qbefore_change_functions); | |
3594 | Qafter_change_functions = intern ("after-change-functions"); | |
3595 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
3596 | |
3597 | Fput (Qprotected_field, Qerror_conditions, | |
3598 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
3599 | Fput (Qprotected_field, Qerror_message, | |
3600 | build_string ("Attempt to modify a protected field")); | |
3601 | ||
3602 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
3603 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
3604 | ||
3605 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
3606 | &buffer_defaults.mode_line_format, | |
3607 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
3608 | This is the same as (default-value 'mode-line-format)."); | |
3609 | ||
3610 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
3611 | &buffer_defaults.abbrev_mode, | |
3612 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
3613 | This is the same as (default-value 'abbrev-mode)."); | |
3614 | ||
3615 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
3616 | &buffer_defaults.ctl_arrow, | |
3617 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
3618 | This is the same as (default-value 'ctl-arrow)."); | |
3619 | ||
3620 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
3621 | &buffer_defaults.truncate_lines, | |
3622 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
3623 | This is the same as (default-value 'truncate-lines)."); | |
3624 | ||
3625 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
3626 | &buffer_defaults.fill_column, | |
3627 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
3628 | This is the same as (default-value 'fill-column)."); | |
3629 | ||
3630 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
3631 | &buffer_defaults.left_margin, | |
3632 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
3633 | This is the same as (default-value 'left-margin)."); | |
3634 | ||
3635 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
3636 | &buffer_defaults.tab_width, | |
3637 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
3638 | This is the same as (default-value 'tab-width)."); | |
3639 | ||
3640 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
3641 | &buffer_defaults.case_fold_search, | |
3642 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
3643 | This is the same as (default-value 'case-fold-search)."); | |
3644 | ||
f7975d07 | 3645 | #ifdef DOS_NT |
54ad07d3 RS |
3646 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
3647 | &buffer_defaults.buffer_file_type, | |
3648 | "Default file type for buffers that do not override it.\n\ | |
3649 | This is the same as (default-value 'buffer-file-type).\n\ | |
3650 | The file type is nil for text, t for binary."); | |
3651 | #endif | |
3652 | ||
0fa3ba92 JB |
3653 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
3654 | Qnil, 0); | |
1ab256cb RM |
3655 | |
3656 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
3657 | But make-docfile finds it! | |
3658 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 3659 | Qnil, |
1ab256cb RM |
3660 | "Template for displaying mode line for current buffer.\n\ |
3661 | Each buffer has its own value of this variable.\n\ | |
3662 | Value may be a string, a symbol or a list or cons cell.\n\ | |
3663 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
3664 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
3665 | in that the %-constructs below are not recognized.\n\ | |
3666 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
3667 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
3668 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
3669 | For a list whose car is a string or list, each element is processed\n\ | |
3670 | recursively and the results are effectively concatenated.\n\ | |
3671 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
3672 | and padded (if the number is positive) or truncated (if negative)\n\ | |
3673 | to the width specified by that number.\n\ | |
3674 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
3675 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
3676 | or when it is found in a cons-cell or a list)\n\ | |
3677 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
3678 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
3679 | % means buffer is read-only and * means it is modified.\n\ | |
3680 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 3681 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 3682 | %c -- print the current column number (this makes editing slower).\n\ |
dd24e6a6 | 3683 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 3684 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 3685 | or print Bottom or All.\n\ |
1ab256cb | 3686 | %n -- print Narrow if appropriate.\n\ |
b77087c5 | 3687 | %t -- print T if file is text, B if binary.\n\ |
1ab256cb RM |
3688 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
3689 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
3690 | Decimal digits after the % specify field width to which to pad."); | |
3691 | */ | |
3692 | ||
3693 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
3694 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
3695 | nil here means use current buffer's major mode."); | |
3696 | ||
3697 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 3698 | make_number (Lisp_Symbol), |
1ab256cb RM |
3699 | "Symbol for current buffer's major mode."); |
3700 | ||
3701 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 3702 | make_number (Lisp_String), |
1ab256cb RM |
3703 | "Pretty name of current buffer's major mode (a string)."); |
3704 | ||
0fa3ba92 | 3705 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
3706 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
3707 | Automatically becomes buffer-local when set in any fashion."); | |
3708 | ||
3709 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 3710 | Qnil, |
1ab256cb RM |
3711 | "*Non-nil if searches should ignore case.\n\ |
3712 | Automatically becomes buffer-local when set in any fashion."); | |
3713 | ||
3714 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 3715 | make_number (Lisp_Int), |
1ab256cb RM |
3716 | "*Column beyond which automatic line-wrapping should happen.\n\ |
3717 | Automatically becomes buffer-local when set in any fashion."); | |
3718 | ||
3719 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 3720 | make_number (Lisp_Int), |
1ab256cb RM |
3721 | "*Column for the default indent-line-function to indent to.\n\ |
3722 | Linefeed indents to this column in Fundamental mode.\n\ | |
3723 | Automatically becomes buffer-local when set in any fashion."); | |
3724 | ||
3725 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 3726 | make_number (Lisp_Int), |
1ab256cb RM |
3727 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
3728 | Automatically becomes buffer-local when set in any fashion."); | |
3729 | ||
0fa3ba92 | 3730 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
3731 | "*Non-nil means display control chars with uparrow.\n\ |
3732 | Nil means use backslash and octal digits.\n\ | |
3733 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3734 | This variable does not apply to characters whose display is specified\n\ | |
3735 | in the current display table (if there is one)."); | |
3736 | ||
0fa3ba92 | 3737 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
3738 | "*Non-nil means do not display continuation lines;\n\ |
3739 | give each line of text one screen line.\n\ | |
3740 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3741 | \n\ | |
3742 | Note that this is overridden by the variable\n\ | |
3743 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 3744 | and this buffer is not full-frame width."); |
1ab256cb | 3745 | |
f7975d07 | 3746 | #ifdef DOS_NT |
54ad07d3 RS |
3747 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
3748 | Qnil, | |
006d3d34 RS |
3749 | "Non-nil if the visited file is a binary file.\n\ |
3750 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
3751 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 3752 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
3753 | #endif |
3754 | ||
1ab256cb | 3755 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 3756 | make_number (Lisp_String), |
1ab256cb RM |
3757 | "Name of default directory of current buffer. Should end with slash.\n\ |
3758 | Each buffer has its own value of this variable."); | |
3759 | ||
3760 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3761 | Qnil, |
1ab256cb | 3762 | "Function called (if non-nil) to perform auto-fill.\n\ |
54158e68 | 3763 | It is called after self-inserting a space or newline.\n\ |
1ab256cb | 3764 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
3765 | NOTE: This variable is not a hook;\n\ |
3766 | its value may not be a list of functions."); | |
1ab256cb RM |
3767 | |
3768 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3769 | make_number (Lisp_String), |
1ab256cb RM |
3770 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3771 | Each buffer has its own value of this variable."); | |
3772 | ||
f6ed2e84 RS |
3773 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
3774 | make_number (Lisp_String), | |
bb4c204e | 3775 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
3776 | The truename of a file is calculated by `file-truename'\n\ |
3777 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
3778 | Each buffer has its own value of this variable."); |
3779 | ||
1ab256cb | 3780 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 3781 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3782 | make_number (Lisp_String), |
1ab256cb RM |
3783 | "Name of file for auto-saving current buffer,\n\ |
3784 | or nil if buffer should not be auto-saved.\n\ | |
3785 | Each buffer has its own value of this variable."); | |
3786 | ||
0fa3ba92 | 3787 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3788 | "Non-nil if this buffer is read-only.\n\ |
3789 | Each buffer has its own value of this variable."); | |
3790 | ||
0fa3ba92 | 3791 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
3792 | "Non-nil if this buffer's file has been backed up.\n\ |
3793 | Backing up is done before the first time the file is saved.\n\ | |
3794 | Each buffer has its own value of this variable."); | |
3795 | ||
3796 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 3797 | make_number (Lisp_Int), |
1ab256cb RM |
3798 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
3799 | 0 initially.\n\ | |
3800 | Each buffer has its own value of this variable."); | |
3801 | ||
3802 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 3803 | Qnil, |
1ab256cb RM |
3804 | "Non-nil enables selective display:\n\ |
3805 | Integer N as value means display only lines\n\ | |
3806 | that start with less than n columns of space.\n\ | |
3807 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
3808 | Then ^M's in the file are written into files as newlines.\n\n\ | |
3809 | Automatically becomes buffer-local when set in any fashion."); | |
3810 | ||
3811 | #ifndef old | |
3812 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
3813 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 3814 | Qnil, |
1ab256cb RM |
3815 | "t means display ... on previous line when a line is invisible.\n\ |
3816 | Automatically becomes buffer-local when set in any fashion."); | |
3817 | #endif | |
3818 | ||
0fa3ba92 | 3819 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 3820 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
3821 | The value should be one of `overwrite-mode-textual',\n\ |
3822 | `overwrite-mode-binary', or nil.\n\ | |
3823 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 3824 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 3825 | until the tab is filled in.\n\ |
6bbb0d4a | 3826 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
3827 | Automatically becomes buffer-local when set in any fashion."); |
3828 | ||
54939090 RS |
3829 | #if 0 /* The doc string is too long for some compilers, |
3830 | but make-docfile can find it in this comment. */ | |
1ab256cb | 3831 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 3832 | Qnil, |
1ab256cb RM |
3833 | "Display table that controls display of the contents of current buffer.\n\ |
3834 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
3835 | The display table is a char-table created with `make-display-table'.\n\ |
3836 | The ordinary char-table elements control how to display each possible text\n\ | |
3837 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 3838 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
3839 | There are six extra slots to control the display of\n\ |
3840 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
3841 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 3842 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
3843 | (extra-slot 2, a single character);\n\ |
3844 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 3845 | a single character);\n\ |
6fdc249f | 3846 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
3847 | a vector of characters);\n\ |
3848 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
3849 | (extra-slot 5, a single character).\n\ |
3850 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
3851 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
3852 | Each window can have its own, overriding display table."); | |
54939090 RS |
3853 | #endif |
3854 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 3855 | Qnil, 0); |
1ab256cb | 3856 | |
1ab256cb RM |
3857 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
3858 | "Don't ask."); | |
3859 | */ | |
01050cb5 | 3860 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
f0724bcb | 3861 | "If non-nil, a function to call before each text change (obsolete).\n\ |
1ab256cb RM |
3862 | Two arguments are passed to the function: the positions of\n\ |
3863 | the beginning and end of the range of old text to be changed.\n\ | |
3864 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3865 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 3866 | \n\ |
5f079267 | 3867 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
3868 | don't call any before-change or after-change functions.\n\ |
3869 | That's because these variables are temporarily set to nil.\n\ | |
3870 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3871 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
3872 | accomplishing an equivalent result by using other variables.\n\n\ |
3873 | This variable is obsolete; use `before-change-functions' instead."); | |
1ab256cb RM |
3874 | Vbefore_change_function = Qnil; |
3875 | ||
3876 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
f0724bcb | 3877 | "If non-nil, a Function to call after each text change (obsolete).\n\ |
1ab256cb RM |
3878 | Three arguments are passed to the function: the positions of\n\ |
3879 | the beginning and end of the range of changed text,\n\ | |
3880 | and the length of the pre-change text replaced by that range.\n\ | |
3881 | \(For an insertion, the pre-change length is zero;\n\ | |
3882 | for a deletion, that length is the number of characters deleted,\n\ | |
3883 | and the post-change beginning and end are at the same place.)\n\ | |
3884 | \n\ | |
5f079267 | 3885 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
3886 | don't call any before-change or after-change functions.\n\ |
3887 | That's because these variables are temporarily set to nil.\n\ | |
3888 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3889 | these variables. See the Emacs Lisp manual for a way of\n\ | |
f0724bcb RS |
3890 | accomplishing an equivalent result by using other variables.\n\n\ |
3891 | This variable is obsolete; use `after-change-functions' instead."); | |
1ab256cb RM |
3892 | Vafter_change_function = Qnil; |
3893 | ||
5f079267 RS |
3894 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
3895 | "List of functions to call before each text change.\n\ | |
3896 | Two arguments are passed to each function: the positions of\n\ | |
3897 | the beginning and end of the range of old text to be changed.\n\ | |
3898 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3899 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
3900 | \n\ |
3901 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
3902 | don't call any before-change or after-change functions.\n\ |
3903 | That's because these variables are temporarily set to nil.\n\ | |
3904 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3905 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3906 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
3907 | Vbefore_change_functions = Qnil; |
3908 | ||
3909 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
3910 | "List of function to call after each text change.\n\ | |
3911 | Three arguments are passed to each function: the positions of\n\ | |
3912 | the beginning and end of the range of changed text,\n\ | |
3913 | and the length of the pre-change text replaced by that range.\n\ | |
3914 | \(For an insertion, the pre-change length is zero;\n\ | |
3915 | for a deletion, that length is the number of characters deleted,\n\ | |
3916 | and the post-change beginning and end are at the same place.)\n\ | |
3917 | \n\ | |
3918 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
3919 | don't call any before-change or after-change functions.\n\ |
3920 | That's because these variables are temporarily set to nil.\n\ | |
3921 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3922 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3923 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 3924 | |
5f079267 RS |
3925 | Vafter_change_functions = Qnil; |
3926 | ||
dbc4e1c1 JB |
3927 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
3928 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
3929 | The functions are run using the `run-hooks' function."); | |
3930 | Vfirst_change_hook = Qnil; | |
1ab256cb | 3931 | |
54939090 RS |
3932 | #if 0 /* The doc string is too long for some compilers, |
3933 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 3934 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
3935 | "List of undo entries in current buffer.\n\ |
3936 | Recent changes come first; older changes follow newer.\n\ | |
3937 | \n\ | |
630f4018 KH |
3938 | An entry (BEG . END) represents an insertion which begins at\n\ |
3939 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
3940 | \n\ |
3941 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
3942 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
3943 | of the text being deleted; if negative, point was at the end.\n\ | |
3944 | \n\ | |
6c0df54a RS |
3945 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
3946 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
3947 | of the visited file's modification time, as of that time. If the\n\ | |
3948 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
3949 | obsolete.\n\ |
3950 | \n\ | |
6c0df54a RS |
3951 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
3952 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
3953 | and VALUE is the old value.\n\ | |
483c1fd3 | 3954 | \n\ |
da1c183c RS |
3955 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
3956 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
3957 | \n\ | |
bec44fd6 JB |
3958 | An entry of the form POSITION indicates that point was at the buffer\n\ |
3959 | location given by the integer. Undoing an entry of this form places\n\ | |
3960 | point at POSITION.\n\ | |
3961 | \n\ | |
1ab256cb RM |
3962 | nil marks undo boundaries. The undo command treats the changes\n\ |
3963 | between two undo boundaries as a single step to be undone.\n\ | |
3964 | \n\ | |
bec44fd6 | 3965 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
3966 | #endif |
3967 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 3968 | 0); |
1ab256cb | 3969 | |
c48f61ef RS |
3970 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
3971 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
3972 | Automatically local in all buffers."); | |
3973 | ||
28e969dd | 3974 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
3975 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
3976 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 3977 | \n\ |
f0c5b712 JB |
3978 | Normally, the line-motion functions work by scanning the buffer for\n\ |
3979 | newlines. Columnar operations (like move-to-column and\n\ | |
3980 | compute-motion) also work by scanning the buffer, summing character\n\ | |
3981 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 3982 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
3983 | motion functions will take longer to execute. Emacs may also take\n\ |
3984 | longer to update the display.\n\ | |
28e969dd | 3985 | \n\ |
f0c5b712 JB |
3986 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
3987 | results of their scans, and consult the cache to avoid rescanning\n\ | |
3988 | regions of the buffer until the text is modified. The caches are most\n\ | |
3989 | beneficial when they prevent the most searching---that is, when the\n\ | |
3990 | buffer contains long lines and large regions of characters with the\n\ | |
3991 | same, fixed screen width.\n\ | |
28e969dd | 3992 | \n\ |
f0c5b712 JB |
3993 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
3994 | become slightly slower (because of the overhead of consulting the\n\ | |
3995 | cache), and the caches will use memory roughly proportional to the\n\ | |
3996 | number of newlines and characters whose screen width varies.\n\ | |
3997 | \n\ | |
3998 | The caches require no explicit maintenance; their accuracy is\n\ | |
3999 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
4000 | the cache should not affect the behavior of any of the motion\n\ | |
4001 | functions; it should only affect their performance."); | |
28e969dd | 4002 | |
943e065b RS |
4003 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
4004 | "Value of point before the last series of scroll operations, or nil."); | |
4005 | ||
be9aafdd BG |
4006 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
4007 | "List of formats to use when saving this buffer.\n\ | |
4008 | Formats are defined by `format-alist'. This variable is\n\ | |
4009 | set when a file is visited. Automatically local in all buffers."); | |
4010 | ||
3cb719bd RS |
4011 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4012 | ¤t_buffer->invisibility_spec, Qnil, | |
4013 | "Invisibility spec of this buffer.\n\ | |
4014 | The default is t, which means that text is invisible\n\ | |
4015 | if it has a non-nil `invisible' property.\n\ | |
4016 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
4017 | property is an element in that list.\n\ | |
554216ad KH |
4018 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
4019 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
4020 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
4021 | ||
c48f61ef RS |
4022 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
4023 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
4024 | Vtransient_mark_mode = Qnil; | |
4025 | ||
0a4469c9 | 4026 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
4027 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
4028 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
4029 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
4030 | and disregard a `read-only' text property if the property value\n\ | |
4031 | is a member of the list."); | |
4032 | Vinhibit_read_only = Qnil; | |
4033 | ||
dcdffbf6 RS |
4034 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
4035 | "List of functions called with no args to query before killing a buffer."); | |
4036 | Vkill_buffer_query_functions = Qnil; | |
4037 | ||
0dc88e60 | 4038 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
4039 | defsubr (&Sbuffer_list); |
4040 | defsubr (&Sget_buffer); | |
4041 | defsubr (&Sget_file_buffer); | |
4042 | defsubr (&Sget_buffer_create); | |
336cd056 | 4043 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 4044 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
4045 | defsubr (&Sbuffer_name); |
4046 | /*defsubr (&Sbuffer_number);*/ | |
4047 | defsubr (&Sbuffer_file_name); | |
336cd056 | 4048 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
4049 | defsubr (&Sbuffer_local_variables); |
4050 | defsubr (&Sbuffer_modified_p); | |
4051 | defsubr (&Sset_buffer_modified_p); | |
4052 | defsubr (&Sbuffer_modified_tick); | |
4053 | defsubr (&Srename_buffer); | |
4054 | defsubr (&Sother_buffer); | |
4055 | defsubr (&Sbuffer_disable_undo); | |
4056 | defsubr (&Sbuffer_enable_undo); | |
4057 | defsubr (&Skill_buffer); | |
4058 | defsubr (&Serase_buffer); | |
a9ee7a59 | 4059 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
4060 | defsubr (&Sswitch_to_buffer); |
4061 | defsubr (&Spop_to_buffer); | |
4062 | defsubr (&Scurrent_buffer); | |
4063 | defsubr (&Sset_buffer); | |
4064 | defsubr (&Sbarf_if_buffer_read_only); | |
4065 | defsubr (&Sbury_buffer); | |
1ab256cb | 4066 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 4067 | |
52f8ec73 | 4068 | defsubr (&Soverlayp); |
2eec3b4e RS |
4069 | defsubr (&Smake_overlay); |
4070 | defsubr (&Sdelete_overlay); | |
4071 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
4072 | defsubr (&Soverlay_start); |
4073 | defsubr (&Soverlay_end); | |
4074 | defsubr (&Soverlay_buffer); | |
4075 | defsubr (&Soverlay_properties); | |
2eec3b4e | 4076 | defsubr (&Soverlays_at); |
74514898 | 4077 | defsubr (&Soverlays_in); |
2eec3b4e | 4078 | defsubr (&Snext_overlay_change); |
239c932b | 4079 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
4080 | defsubr (&Soverlay_recenter); |
4081 | defsubr (&Soverlay_lists); | |
4082 | defsubr (&Soverlay_get); | |
4083 | defsubr (&Soverlay_put); | |
1ab256cb RM |
4084 | } |
4085 | ||
4086 | keys_of_buffer () | |
4087 | { | |
4088 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
4089 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
4090 | |
4091 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
4092 | initialized when that function gets called. */ | |
4093 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 4094 | } |