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; | |
336cd056 RS |
316 | BUF_SAVE_MODIFF (b) = 1; |
317 | BUF_INTERVALS (b) = 0; | |
1ab256cb | 318 | |
28e969dd JB |
319 | b->newline_cache = 0; |
320 | b->width_run_cache = 0; | |
321 | b->width_table = Qnil; | |
322 | ||
1ab256cb RM |
323 | /* Put this on the chain of all buffers including killed ones. */ |
324 | b->next = all_buffers; | |
325 | all_buffers = b; | |
326 | ||
336cd056 RS |
327 | /* An ordinary buffer normally doesn't need markers |
328 | to handle BEGV and ZV. */ | |
329 | b->pt_marker = Qnil; | |
330 | b->begv_marker = Qnil; | |
331 | b->zv_marker = Qnil; | |
04ae1b48 RS |
332 | |
333 | name = Fcopy_sequence (name); | |
334 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
1ab256cb | 335 | b->name = name; |
04ae1b48 | 336 | |
1ab256cb RM |
337 | if (XSTRING (name)->data[0] != ' ') |
338 | b->undo_list = Qnil; | |
339 | else | |
340 | b->undo_list = Qt; | |
341 | ||
342 | reset_buffer (b); | |
13de9290 | 343 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
344 | |
345 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 346 | XSETBUFFER (buf, b); |
1ab256cb RM |
347 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
348 | ||
349 | b->mark = Fmake_marker (); | |
336cd056 RS |
350 | BUF_MARKERS (b) = Qnil; |
351 | b->name = name; | |
352 | return buf; | |
353 | } | |
354 | ||
a2428fa2 | 355 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
193c3837 | 356 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
357 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
358 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
9e552710 RS |
359 | NAME should be a string which is not the name of an existing buffer.") |
360 | (base_buffer, name) | |
361 | register Lisp_Object base_buffer, name; | |
336cd056 RS |
362 | { |
363 | register Lisp_Object buf; | |
364 | register struct buffer *b; | |
365 | ||
366 | buf = Fget_buffer (name); | |
367 | if (!NILP (buf)) | |
368 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
369 | ||
370 | base_buffer = Fget_buffer (base_buffer); | |
371 | if (NILP (base_buffer)) | |
372 | error ("No such buffer: `%s'", | |
373 | XSTRING (XBUFFER (base_buffer)->name)->data); | |
374 | ||
375 | if (XSTRING (name)->size == 0) | |
376 | error ("Empty string for buffer name is not allowed"); | |
377 | ||
378 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); | |
379 | ||
380 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); | |
381 | ||
382 | if (XBUFFER (base_buffer)->base_buffer) | |
383 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
384 | else | |
385 | b->base_buffer = XBUFFER (base_buffer); | |
386 | ||
387 | /* Use the base buffer's text object. */ | |
388 | b->text = b->base_buffer->text; | |
389 | ||
390 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
391 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
392 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
393 | ||
394 | b->newline_cache = 0; | |
395 | b->width_run_cache = 0; | |
396 | b->width_table = Qnil; | |
397 | ||
398 | /* Put this on the chain of all buffers including killed ones. */ | |
399 | b->next = all_buffers; | |
400 | all_buffers = b; | |
401 | ||
402 | name = Fcopy_sequence (name); | |
403 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); | |
404 | b->name = name; | |
405 | ||
406 | reset_buffer (b); | |
13de9290 | 407 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
408 | |
409 | /* Put this in the alist of all live buffers. */ | |
410 | XSETBUFFER (buf, b); | |
411 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
412 | ||
413 | b->mark = Fmake_marker (); | |
1ab256cb | 414 | b->name = name; |
336cd056 RS |
415 | |
416 | /* Make sure the base buffer has markers for its narrowing. */ | |
417 | if (NILP (b->base_buffer->pt_marker)) | |
418 | { | |
419 | b->base_buffer->pt_marker = Fmake_marker (); | |
420 | Fset_marker (b->base_buffer->pt_marker, | |
421 | make_number (BUF_PT (b->base_buffer)), base_buffer); | |
422 | } | |
423 | if (NILP (b->base_buffer->begv_marker)) | |
424 | { | |
425 | b->base_buffer->begv_marker = Fmake_marker (); | |
426 | Fset_marker (b->base_buffer->begv_marker, | |
427 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); | |
428 | } | |
429 | if (NILP (b->base_buffer->zv_marker)) | |
430 | { | |
431 | b->base_buffer->zv_marker = Fmake_marker (); | |
432 | Fset_marker (b->base_buffer->zv_marker, | |
433 | make_number (BUF_ZV (b->base_buffer)), base_buffer); | |
26d84681 | 434 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
435 | } |
436 | ||
437 | /* Give the indirect buffer markers for its narrowing. */ | |
ea064aa0 RS |
438 | b->pt_marker = Fmake_marker (); |
439 | Fset_marker (b->pt_marker, make_number (BUF_PT (b)), buf); | |
440 | b->begv_marker = Fmake_marker (); | |
441 | Fset_marker (b->begv_marker, make_number (BUF_BEGV (b)), buf); | |
442 | b->zv_marker = Fmake_marker (); | |
443 | Fset_marker (b->zv_marker, make_number (BUF_ZV (b)), buf); | |
444 | ||
26d84681 | 445 | XMARKER (b->zv_marker)->insertion_type = 1; |
336cd056 | 446 | |
a9ee7a59 | 447 | return buf; |
1ab256cb RM |
448 | } |
449 | ||
bcd40520 RS |
450 | /* Reinitialize everything about a buffer except its name and contents |
451 | and local variables. */ | |
1ab256cb RM |
452 | |
453 | void | |
454 | reset_buffer (b) | |
455 | register struct buffer *b; | |
456 | { | |
457 | b->filename = Qnil; | |
f6ed2e84 | 458 | b->file_truename = Qnil; |
1ab256cb RM |
459 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
460 | b->modtime = 0; | |
8d7a4592 | 461 | XSETFASTINT (b->save_length, 0); |
1ab256cb RM |
462 | b->last_window_start = 1; |
463 | b->backed_up = Qnil; | |
464 | b->auto_save_modified = 0; | |
84f6bcba | 465 | b->auto_save_failure_time = -1; |
1ab256cb RM |
466 | b->auto_save_file_name = Qnil; |
467 | b->read_only = Qnil; | |
2eec3b4e RS |
468 | b->overlays_before = Qnil; |
469 | b->overlays_after = Qnil; | |
8d7a4592 | 470 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 471 | b->mark_active = Qnil; |
943e065b | 472 | b->point_before_scroll = Qnil; |
be9aafdd | 473 | b->file_format = Qnil; |
0dc6f165 | 474 | b->last_selected_window = Qnil; |
fb2030e3 RS |
475 | b->extra2 = Qnil; |
476 | b->extra3 = Qnil; | |
1ab256cb RM |
477 | } |
478 | ||
bcd40520 RS |
479 | /* Reset buffer B's local variables info. |
480 | Don't use this on a buffer that has already been in use; | |
481 | it does not treat permanent locals consistently. | |
13de9290 RS |
482 | Instead, use Fkill_all_local_variables. |
483 | ||
484 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
485 | buffer-local variables. If PERMANENT_TOO is 0, | |
486 | we preserve those. */ | |
bcd40520 | 487 | |
13de9290 RS |
488 | static void |
489 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 490 | register struct buffer *b; |
13de9290 | 491 | int permanent_too; |
1ab256cb RM |
492 | { |
493 | register int offset; | |
13de9290 RS |
494 | int dont_reset; |
495 | ||
496 | /* Decide which built-in local variables to reset. */ | |
497 | if (permanent_too) | |
498 | dont_reset = 0; | |
499 | else | |
500 | dont_reset = buffer_permanent_local_flags; | |
1ab256cb RM |
501 | |
502 | /* Reset the major mode to Fundamental, together with all the | |
503 | things that depend on the major mode. | |
504 | default-major-mode is handled at a higher level. | |
505 | We ignore it here. */ | |
506 | b->major_mode = Qfundamental_mode; | |
507 | b->keymap = Qnil; | |
508 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
509 | b->mode_name = QSFundamental; | |
510 | b->minor_modes = Qnil; | |
3446af9c RS |
511 | |
512 | /* If the standard case table has been altered and invalidated, | |
513 | fix up its insides first. */ | |
514 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
515 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
516 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
517 | Fset_standard_case_table (Vascii_downcase_table); | |
518 | ||
1ab256cb | 519 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
520 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
521 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
522 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 523 | b->invisibility_spec = Qt; |
2e716096 RS |
524 | #ifndef DOS_NT |
525 | b->buffer_file_type = Qnil; | |
526 | #endif | |
3cb719bd | 527 | |
1ab256cb RM |
528 | #if 0 |
529 | b->sort_table = XSTRING (Vascii_sort_table); | |
530 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
531 | #endif /* 0 */ | |
532 | ||
13de9290 | 533 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 534 | b->local_var_alist = Qnil; |
13de9290 | 535 | b->local_var_flags &= dont_reset; |
1ab256cb RM |
536 | |
537 | /* For each slot that has a default value, | |
538 | copy that into the slot. */ | |
539 | ||
540 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; | |
541 | offset < sizeof (struct buffer); | |
4d2f1389 | 542 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
aab80822 KH |
543 | { |
544 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); | |
13de9290 RS |
545 | if ((flag > 0 |
546 | /* Don't reset a permanent local. */ | |
547 | && ! (dont_reset & flag)) | |
548 | || flag == -2) | |
549 | *(Lisp_Object *)(offset + (char *)b) | |
550 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); | |
aab80822 | 551 | } |
1ab256cb RM |
552 | } |
553 | ||
01050cb5 RM |
554 | /* We split this away from generate-new-buffer, because rename-buffer |
555 | and set-visited-file-name ought to be able to use this to really | |
556 | rename the buffer properly. */ | |
557 | ||
558 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 559 | 1, 2, 0, |
01050cb5 RM |
560 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
561 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 562 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 563 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 564 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 565 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 566 | even if a buffer with that name exists.") |
c273e647 RS |
567 | (name, ignore) |
568 | register Lisp_Object name, ignore; | |
1ab256cb RM |
569 | { |
570 | register Lisp_Object gentemp, tem; | |
571 | int count; | |
572 | char number[10]; | |
573 | ||
574 | CHECK_STRING (name, 0); | |
575 | ||
576 | tem = Fget_buffer (name); | |
265a9e55 | 577 | if (NILP (tem)) |
01050cb5 | 578 | return name; |
1ab256cb RM |
579 | |
580 | count = 1; | |
581 | while (1) | |
582 | { | |
583 | sprintf (number, "<%d>", ++count); | |
584 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 585 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
586 | if (!NILP (tem)) |
587 | return gentemp; | |
1ab256cb | 588 | tem = Fget_buffer (gentemp); |
265a9e55 | 589 | if (NILP (tem)) |
01050cb5 | 590 | return gentemp; |
1ab256cb RM |
591 | } |
592 | } | |
593 | ||
594 | \f | |
595 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
596 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 597 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
598 | (buffer) |
599 | register Lisp_Object buffer; | |
600 | { | |
265a9e55 | 601 | if (NILP (buffer)) |
1ab256cb RM |
602 | return current_buffer->name; |
603 | CHECK_BUFFER (buffer, 0); | |
604 | return XBUFFER (buffer)->name; | |
605 | } | |
606 | ||
607 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
608 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
609 | No argument or nil as argument means use the current buffer.") | |
610 | (buffer) | |
611 | register Lisp_Object buffer; | |
612 | { | |
265a9e55 | 613 | if (NILP (buffer)) |
1ab256cb RM |
614 | return current_buffer->filename; |
615 | CHECK_BUFFER (buffer, 0); | |
616 | return XBUFFER (buffer)->filename; | |
617 | } | |
618 | ||
336cd056 RS |
619 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
620 | 0, 1, 0, | |
621 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
622 | If BUFFER is not indirect, return nil.") | |
623 | (buffer) | |
624 | register Lisp_Object buffer; | |
625 | { | |
626 | struct buffer *base; | |
627 | Lisp_Object base_buffer; | |
628 | ||
629 | if (NILP (buffer)) | |
630 | base = current_buffer->base_buffer; | |
631 | else | |
632 | { | |
633 | CHECK_BUFFER (buffer, 0); | |
634 | base = XBUFFER (buffer)->base_buffer; | |
635 | } | |
636 | ||
637 | if (! base) | |
638 | return Qnil; | |
639 | XSETBUFFER (base_buffer, base); | |
640 | return base_buffer; | |
641 | } | |
642 | ||
1ab256cb RM |
643 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
644 | Sbuffer_local_variables, 0, 1, 0, | |
645 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
646 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
647 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
648 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
649 | No argument or nil as argument means use current buffer as BUFFER.") | |
650 | (buffer) | |
651 | register Lisp_Object buffer; | |
652 | { | |
653 | register struct buffer *buf; | |
553defa4 | 654 | register Lisp_Object result; |
1ab256cb | 655 | |
265a9e55 | 656 | if (NILP (buffer)) |
1ab256cb RM |
657 | buf = current_buffer; |
658 | else | |
659 | { | |
660 | CHECK_BUFFER (buffer, 0); | |
661 | buf = XBUFFER (buffer); | |
662 | } | |
663 | ||
553defa4 RS |
664 | result = Qnil; |
665 | ||
1ab256cb | 666 | { |
553defa4 RS |
667 | register Lisp_Object tail; |
668 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1ab256cb | 669 | { |
553defa4 RS |
670 | Lisp_Object val, elt; |
671 | ||
672 | elt = XCONS (tail)->car; | |
673 | ||
e0585c64 RS |
674 | /* Reference each variable in the alist in buf. |
675 | If inquiring about the current buffer, this gets the current values, | |
676 | so store them into the alist so the alist is up to date. | |
677 | If inquiring about some other buffer, this swaps out any values | |
678 | for that buffer, making the alist up to date automatically. */ | |
679 | val = find_symbol_value (XCONS (elt)->car); | |
680 | /* Use the current buffer value only if buf is the current buffer. */ | |
681 | if (buf != current_buffer) | |
553defa4 RS |
682 | val = XCONS (elt)->cdr; |
683 | ||
684 | /* If symbol is unbound, put just the symbol in the list. */ | |
685 | if (EQ (val, Qunbound)) | |
686 | result = Fcons (XCONS (elt)->car, result); | |
687 | /* Otherwise, put (symbol . value) in the list. */ | |
688 | else | |
689 | result = Fcons (Fcons (XCONS (elt)->car, val), result); | |
1ab256cb RM |
690 | } |
691 | } | |
692 | ||
1ab256cb RM |
693 | /* Add on all the variables stored in special slots. */ |
694 | { | |
695 | register int offset, mask; | |
696 | ||
697 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; | |
698 | offset < sizeof (struct buffer); | |
4d2f1389 | 699 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1ab256cb | 700 | { |
aab80822 | 701 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
1ab256cb | 702 | if (mask == -1 || (buf->local_var_flags & mask)) |
aab80822 KH |
703 | if (SYMBOLP (*(Lisp_Object *)(offset |
704 | + (char *)&buffer_local_symbols))) | |
705 | result = Fcons (Fcons (*((Lisp_Object *) | |
706 | (offset + (char *)&buffer_local_symbols)), | |
553defa4 RS |
707 | *(Lisp_Object *)(offset + (char *)buf)), |
708 | result); | |
1ab256cb RM |
709 | } |
710 | } | |
553defa4 RS |
711 | |
712 | return result; | |
1ab256cb RM |
713 | } |
714 | ||
715 | \f | |
716 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
717 | 0, 1, 0, | |
718 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
719 | No argument or nil as argument means use current buffer as BUFFER.") | |
720 | (buffer) | |
721 | register Lisp_Object buffer; | |
722 | { | |
723 | register struct buffer *buf; | |
265a9e55 | 724 | if (NILP (buffer)) |
1ab256cb RM |
725 | buf = current_buffer; |
726 | else | |
727 | { | |
728 | CHECK_BUFFER (buffer, 0); | |
729 | buf = XBUFFER (buffer); | |
730 | } | |
731 | ||
336cd056 | 732 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
733 | } |
734 | ||
735 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
736 | 1, 1, 0, | |
737 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
738 | A non-nil FLAG means mark the buffer modified.") | |
739 | (flag) | |
740 | register Lisp_Object flag; | |
741 | { | |
742 | register int already; | |
743 | register Lisp_Object fn; | |
744 | ||
745 | #ifdef CLASH_DETECTION | |
746 | /* If buffer becoming modified, lock the file. | |
747 | If buffer becoming unmodified, unlock the file. */ | |
748 | ||
60f4dd23 | 749 | fn = current_buffer->file_truename; |
265a9e55 | 750 | if (!NILP (fn)) |
1ab256cb | 751 | { |
336cd056 | 752 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 753 | if (!already && !NILP (flag)) |
1ab256cb | 754 | lock_file (fn); |
265a9e55 | 755 | else if (already && NILP (flag)) |
1ab256cb RM |
756 | unlock_file (fn); |
757 | } | |
758 | #endif /* CLASH_DETECTION */ | |
759 | ||
336cd056 | 760 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1ab256cb RM |
761 | update_mode_lines++; |
762 | return flag; | |
763 | } | |
764 | ||
765 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, | |
766 | 0, 1, 0, | |
767 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
768 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
769 | that buffer is changed. It wraps around occasionally.\n\ | |
770 | No argument or nil as argument means use current buffer as BUFFER.") | |
771 | (buffer) | |
772 | register Lisp_Object buffer; | |
773 | { | |
774 | register struct buffer *buf; | |
265a9e55 | 775 | if (NILP (buffer)) |
1ab256cb RM |
776 | buf = current_buffer; |
777 | else | |
778 | { | |
779 | CHECK_BUFFER (buffer, 0); | |
780 | buf = XBUFFER (buffer); | |
781 | } | |
782 | ||
783 | return make_number (BUF_MODIFF (buf)); | |
784 | } | |
785 | \f | |
01050cb5 | 786 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 787 | "sRename buffer (to new name): \nP", |
1ab256cb | 788 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 789 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 790 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 791 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 792 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
793 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
794 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 795 | This does not change the name of the visited file (if any).") |
489c043a RS |
796 | (newname, unique) |
797 | register Lisp_Object newname, unique; | |
1ab256cb RM |
798 | { |
799 | register Lisp_Object tem, buf; | |
800 | ||
489c043a | 801 | CHECK_STRING (newname, 0); |
d59698c4 | 802 | |
489c043a | 803 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
804 | error ("Empty string is invalid as a buffer name"); |
805 | ||
489c043a | 806 | tem = Fget_buffer (newname); |
c059b5ea RM |
807 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
808 | the buffer automatically so you can create another with the original name. | |
809 | It makes UNIQUE equivalent to | |
489c043a | 810 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
c059b5ea | 811 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
fb5eba9c | 812 | return current_buffer->name; |
265a9e55 | 813 | if (!NILP (tem)) |
01050cb5 | 814 | { |
3bd779aa | 815 | if (!NILP (unique)) |
489c043a | 816 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 817 | else |
489c043a | 818 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 819 | } |
1ab256cb | 820 | |
489c043a | 821 | current_buffer->name = newname; |
76f590d7 JB |
822 | |
823 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
824 | any windows displaying current_buffer will stay unchanged. */ | |
825 | update_mode_lines++; | |
826 | ||
67180c6a | 827 | XSETBUFFER (buf, current_buffer); |
489c043a | 828 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
829 | if (NILP (current_buffer->filename) |
830 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 831 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
832 | /* Refetch since that last call may have done GC. */ |
833 | return current_buffer->name; | |
1ab256cb RM |
834 | } |
835 | ||
a0ebb746 | 836 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
1ab256cb | 837 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
838 | Buffers not visible in windows are preferred to visible buffers,\n\ |
839 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
1ab256cb RM |
840 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
841 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
a0ebb746 JB |
842 | (buffer, visible_ok) |
843 | register Lisp_Object buffer, visible_ok; | |
1ab256cb | 844 | { |
89132f25 | 845 | Lisp_Object Fset_buffer_major_mode (); |
1ab256cb RM |
846 | register Lisp_Object tail, buf, notsogood, tem; |
847 | notsogood = Qnil; | |
848 | ||
265a9e55 | 849 | for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail)) |
1ab256cb RM |
850 | { |
851 | buf = Fcdr (Fcar (tail)); | |
852 | if (EQ (buf, buffer)) | |
853 | continue; | |
854 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
855 | continue; | |
04ae1b48 RS |
856 | /* If the selected frame has a buffer_predicate, |
857 | disregard buffers that don't fit the predicate. */ | |
858 | tem = frame_buffer_predicate (); | |
859 | if (!NILP (tem)) | |
860 | { | |
861 | tem = call1 (tem, buf); | |
862 | if (NILP (tem)) | |
863 | continue; | |
864 | } | |
04ae1b48 | 865 | |
a0ebb746 | 866 | if (NILP (visible_ok)) |
db732e5a | 867 | tem = Fget_buffer_window (buf, Qt); |
a0ebb746 JB |
868 | else |
869 | tem = Qnil; | |
265a9e55 | 870 | if (NILP (tem)) |
1ab256cb | 871 | return buf; |
265a9e55 | 872 | if (NILP (notsogood)) |
1ab256cb RM |
873 | notsogood = buf; |
874 | } | |
265a9e55 | 875 | if (!NILP (notsogood)) |
1ab256cb | 876 | return notsogood; |
89132f25 KH |
877 | buf = Fget_buffer_create (build_string ("*scratch*")); |
878 | Fset_buffer_major_mode (buf); | |
879 | return buf; | |
1ab256cb RM |
880 | } |
881 | \f | |
316784fb KH |
882 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
883 | 0, 1, "", | |
5b8bcf48 RS |
884 | "Make BUFFER stop keeping undo information.\n\ |
885 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
886 | (buffer) |
887 | register Lisp_Object buffer; | |
1ab256cb | 888 | { |
ffd56f97 JB |
889 | Lisp_Object real_buffer; |
890 | ||
891 | if (NILP (buffer)) | |
67180c6a | 892 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
893 | else |
894 | { | |
895 | real_buffer = Fget_buffer (buffer); | |
896 | if (NILP (real_buffer)) | |
897 | nsberror (buffer); | |
898 | } | |
899 | ||
900 | XBUFFER (real_buffer)->undo_list = Qt; | |
901 | ||
1ab256cb RM |
902 | return Qnil; |
903 | } | |
904 | ||
905 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
906 | 0, 1, "", | |
907 | "Start keeping undo information for buffer BUFFER.\n\ | |
908 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
909 | (buffer) |
910 | register Lisp_Object buffer; | |
1ab256cb | 911 | { |
ffd56f97 | 912 | Lisp_Object real_buffer; |
1ab256cb | 913 | |
ffd56f97 | 914 | if (NILP (buffer)) |
67180c6a | 915 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
916 | else |
917 | { | |
ffd56f97 JB |
918 | real_buffer = Fget_buffer (buffer); |
919 | if (NILP (real_buffer)) | |
920 | nsberror (buffer); | |
1ab256cb RM |
921 | } |
922 | ||
ffd56f97 JB |
923 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
924 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
925 | |
926 | return Qnil; | |
927 | } | |
928 | ||
929 | /* | |
930 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
931 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
932 | The buffer being killed will be current while the hook is running.\n\ | |
933 | See `kill-buffer'." | |
934 | */ | |
935 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
936 | "Kill the buffer BUFFER.\n\ | |
937 | The argument may be a buffer or may be the name of a buffer.\n\ | |
938 | An argument of nil means kill the current buffer.\n\n\ | |
939 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
940 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
941 | if not void, is a list of functions to be called, with no arguments,\n\ | |
942 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
943 | when the hook functions are called.\n\n\ | |
944 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 945 | with SIGHUP.") |
a25f13ae KH |
946 | (buffer) |
947 | Lisp_Object buffer; | |
1ab256cb RM |
948 | { |
949 | Lisp_Object buf; | |
950 | register struct buffer *b; | |
951 | register Lisp_Object tem; | |
952 | register struct Lisp_Marker *m; | |
953 | struct gcpro gcpro1, gcpro2; | |
954 | ||
a25f13ae | 955 | if (NILP (buffer)) |
1ab256cb RM |
956 | buf = Fcurrent_buffer (); |
957 | else | |
a25f13ae | 958 | buf = Fget_buffer (buffer); |
265a9e55 | 959 | if (NILP (buf)) |
a25f13ae | 960 | nsberror (buffer); |
1ab256cb RM |
961 | |
962 | b = XBUFFER (buf); | |
963 | ||
4a4a9db5 KH |
964 | /* Avoid trouble for buffer already dead. */ |
965 | if (NILP (b->name)) | |
966 | return Qnil; | |
967 | ||
1ab256cb | 968 | /* Query if the buffer is still modified. */ |
265a9e55 | 969 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 970 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 971 | { |
a25f13ae | 972 | GCPRO1 (buf); |
1ab256cb RM |
973 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
974 | XSTRING (b->name)->data)); | |
975 | UNGCPRO; | |
265a9e55 | 976 | if (NILP (tem)) |
1ab256cb RM |
977 | return Qnil; |
978 | } | |
979 | ||
dcdffbf6 | 980 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb RM |
981 | { |
982 | register Lisp_Object val; | |
983 | int count = specpdl_ptr - specpdl; | |
dcdffbf6 | 984 | Lisp_Object list; |
1ab256cb RM |
985 | |
986 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
987 | set_buffer_internal (b); | |
dcdffbf6 RS |
988 | |
989 | /* First run the query functions; if any query is answered no, | |
990 | don't kill the buffer. */ | |
991 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
992 | { | |
993 | tem = call0 (Fcar (list)); | |
994 | if (NILP (tem)) | |
995 | return unbind_to (count, Qnil); | |
996 | } | |
997 | ||
998 | /* Then run the hooks. */ | |
fd186f07 RS |
999 | if (!NILP (Vrun_hooks)) |
1000 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1001 | unbind_to (count, Qnil); |
1002 | } | |
1003 | ||
1004 | /* We have no more questions to ask. Verify that it is valid | |
1005 | to kill the buffer. This must be done after the questions | |
1006 | since anything can happen within do_yes_or_no_p. */ | |
1007 | ||
1008 | /* Don't kill the minibuffer now current. */ | |
1009 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1010 | return Qnil; | |
1011 | ||
265a9e55 | 1012 | if (NILP (b->name)) |
1ab256cb RM |
1013 | return Qnil; |
1014 | ||
336cd056 RS |
1015 | /* When we kill a base buffer, kill all its indirect buffers. |
1016 | We do it at this stage so nothing terrible happens if they | |
1017 | ask questions or their hooks get errors. */ | |
1018 | if (! b->base_buffer) | |
1019 | { | |
1020 | struct buffer *other; | |
1021 | ||
1022 | GCPRO1 (buf); | |
1023 | ||
1024 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1025 | /* all_buffers contains dead buffers too; |
1026 | don't re-kill them. */ | |
1027 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1028 | { |
1029 | Lisp_Object buf; | |
1030 | XSETBUFFER (buf, other); | |
1031 | Fkill_buffer (buf); | |
1032 | } | |
1033 | ||
1034 | UNGCPRO; | |
1035 | } | |
1036 | ||
1ab256cb RM |
1037 | /* Make this buffer not be current. |
1038 | In the process, notice if this is the sole visible buffer | |
1039 | and give up if so. */ | |
1040 | if (b == current_buffer) | |
1041 | { | |
172a9c1f | 1042 | tem = Fother_buffer (buf, Qnil); |
1ab256cb RM |
1043 | Fset_buffer (tem); |
1044 | if (b == current_buffer) | |
1045 | return Qnil; | |
1046 | } | |
1047 | ||
1048 | /* Now there is no question: we can kill the buffer. */ | |
1049 | ||
1050 | #ifdef CLASH_DETECTION | |
1051 | /* Unlock this buffer's file, if it is locked. */ | |
1052 | unlock_buffer (b); | |
1053 | #endif /* CLASH_DETECTION */ | |
1054 | ||
1ab256cb | 1055 | kill_buffer_processes (buf); |
1ab256cb RM |
1056 | |
1057 | tem = Vinhibit_quit; | |
1058 | Vinhibit_quit = Qt; | |
00550f94 | 1059 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1060 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
1ab256cb RM |
1061 | Vinhibit_quit = tem; |
1062 | ||
9b59d6d0 | 1063 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1064 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 RS |
1065 | && b->auto_save_modified != 0 |
1066 | && SAVE_MODIFF < b->auto_save_modified) | |
1ab256cb RM |
1067 | { |
1068 | Lisp_Object tem; | |
1069 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1070 | if (! NILP (tem)) |
cbb6a418 | 1071 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1072 | } |
1073 | ||
4a4a9db5 KH |
1074 | if (b->base_buffer) |
1075 | { | |
1076 | /* Unchain all markers that belong to this indirect buffer. | |
1077 | Don't unchain the markers that belong to the base buffer | |
1078 | or its other indirect buffers. */ | |
1079 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1080 | { | |
1081 | Lisp_Object next; | |
1082 | m = XMARKER (tem); | |
1083 | next = m->chain; | |
1084 | if (m->buffer == b) | |
1085 | unchain_marker (tem); | |
1086 | tem = next; | |
1087 | } | |
1088 | } | |
1089 | else | |
1ab256cb | 1090 | { |
4a4a9db5 | 1091 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1092 | and leave them pointing nowhere. */ |
4a4a9db5 | 1093 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1094 | { |
1095 | m = XMARKER (tem); | |
1096 | m->buffer = 0; | |
1097 | tem = m->chain; | |
1098 | m->chain = Qnil; | |
1099 | } | |
1100 | BUF_MARKERS (b) = Qnil; | |
1ab256cb | 1101 | |
336cd056 RS |
1102 | #ifdef USE_TEXT_PROPERTIES |
1103 | BUF_INTERVALS (b) = NULL_INTERVAL; | |
1104 | #endif | |
1105 | ||
1106 | /* Perhaps we should explicitly free the interval tree here... */ | |
1107 | } | |
33f7013e | 1108 | |
2f3f993b RS |
1109 | /* Reset the local variables, so that this buffer's local values |
1110 | won't be protected from GC. They would be protected | |
1111 | if they happened to remain encached in their symbols. | |
1112 | This gets rid of them for certain. */ | |
1113 | swap_out_buffer_local_variables (b); | |
13de9290 | 1114 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1115 | |
1ab256cb | 1116 | b->name = Qnil; |
336cd056 | 1117 | |
9ac0d9e0 | 1118 | BLOCK_INPUT; |
336cd056 RS |
1119 | if (! b->base_buffer) |
1120 | BUFFER_FREE (BUF_BEG_ADDR (b)); | |
1121 | ||
28e969dd JB |
1122 | if (b->newline_cache) |
1123 | { | |
1124 | free_region_cache (b->newline_cache); | |
1125 | b->newline_cache = 0; | |
1126 | } | |
1127 | if (b->width_run_cache) | |
1128 | { | |
1129 | free_region_cache (b->width_run_cache); | |
1130 | b->width_run_cache = 0; | |
1131 | } | |
1132 | b->width_table = Qnil; | |
9ac0d9e0 | 1133 | UNBLOCK_INPUT; |
1ab256cb RM |
1134 | b->undo_list = Qnil; |
1135 | ||
1136 | return Qt; | |
1137 | } | |
1138 | \f | |
36a8c287 JB |
1139 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1140 | we do this each time BUF is selected visibly, the more recently | |
1141 | selected buffers are always closer to the front of the list. This | |
1142 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb RM |
1143 | |
1144 | record_buffer (buf) | |
1145 | Lisp_Object buf; | |
1146 | { | |
1147 | register Lisp_Object link, prev; | |
1148 | ||
1149 | prev = Qnil; | |
1150 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) | |
1151 | { | |
1152 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) | |
1153 | break; | |
1154 | prev = link; | |
1155 | } | |
1156 | ||
36a8c287 JB |
1157 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1158 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1159 | |
265a9e55 | 1160 | if (NILP (prev)) |
1ab256cb RM |
1161 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
1162 | else | |
1163 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; | |
1164 | ||
1165 | XCONS(link)->cdr = Vbuffer_alist; | |
1166 | Vbuffer_alist = link; | |
1167 | } | |
1168 | ||
a9ee7a59 KH |
1169 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1170 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1171 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1172 | the current buffer's major mode.") | |
a2428fa2 EN |
1173 | (buffer) |
1174 | Lisp_Object buffer; | |
a9ee7a59 KH |
1175 | { |
1176 | int count; | |
1177 | Lisp_Object function; | |
1178 | ||
1179 | function = buffer_defaults.major_mode; | |
1180 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1181 | function = current_buffer->major_mode; | |
1182 | ||
1183 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1184 | return Qnil; | |
1185 | ||
1186 | count = specpdl_ptr - specpdl; | |
1187 | ||
1188 | /* To select a nonfundamental mode, | |
1189 | select the buffer temporarily and then call the mode function. */ | |
1190 | ||
1191 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1192 | ||
a2428fa2 | 1193 | Fset_buffer (buffer); |
a9ee7a59 KH |
1194 | call0 (function); |
1195 | ||
1196 | return unbind_to (count, Qnil); | |
1197 | } | |
1198 | ||
1ab256cb RM |
1199 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1200 | "Select buffer BUFFER in the current window.\n\ | |
1201 | BUFFER may be a buffer or a buffer name.\n\ | |
1202 | Optional second arg NORECORD non-nil means\n\ | |
1203 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1204 | \n\ | |
1205 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1206 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1207 | the window-buffer correspondences.") | |
a25f13ae KH |
1208 | (buffer, norecord) |
1209 | Lisp_Object buffer, norecord; | |
1ab256cb RM |
1210 | { |
1211 | register Lisp_Object buf; | |
1212 | Lisp_Object tem; | |
1213 | ||
1214 | if (EQ (minibuf_window, selected_window)) | |
1215 | error ("Cannot switch buffers in minibuffer window"); | |
1216 | tem = Fwindow_dedicated_p (selected_window); | |
265a9e55 | 1217 | if (!NILP (tem)) |
1ab256cb RM |
1218 | error ("Cannot switch buffers in a dedicated window"); |
1219 | ||
a25f13ae | 1220 | if (NILP (buffer)) |
172a9c1f | 1221 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1222 | else |
a9ee7a59 | 1223 | { |
a25f13ae | 1224 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1225 | if (NILP (buf)) |
1226 | { | |
a25f13ae | 1227 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1228 | Fset_buffer_major_mode (buf); |
1229 | } | |
1230 | } | |
1ab256cb | 1231 | Fset_buffer (buf); |
265a9e55 | 1232 | if (NILP (norecord)) |
1ab256cb RM |
1233 | record_buffer (buf); |
1234 | ||
1235 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1236 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1237 | : selected_window, | |
1ab256cb RM |
1238 | buf); |
1239 | ||
e8b3a22d | 1240 | return buf; |
1ab256cb RM |
1241 | } |
1242 | ||
1243 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, | |
1244 | "Select buffer BUFFER in some window, preferably a different one.\n\ | |
1245 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1246 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1247 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1248 | window even if BUFFER is already visible in the selected window.\n\ |
1249 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
1250 | of `display-buffer' for additional customization information.") | |
a2428fa2 EN |
1251 | (buffer, other_window) |
1252 | Lisp_Object buffer, other_window; | |
1ab256cb RM |
1253 | { |
1254 | register Lisp_Object buf; | |
a25f13ae | 1255 | if (NILP (buffer)) |
172a9c1f | 1256 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
1ab256cb | 1257 | else |
7c2087ee | 1258 | { |
a25f13ae | 1259 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1260 | if (NILP (buf)) |
1261 | { | |
a25f13ae | 1262 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1263 | Fset_buffer_major_mode (buf); |
1264 | } | |
1265 | } | |
1ab256cb RM |
1266 | Fset_buffer (buf); |
1267 | record_buffer (buf); | |
a2428fa2 | 1268 | Fselect_window (Fdisplay_buffer (buf, other_window)); |
e8b3a22d | 1269 | return buf; |
1ab256cb RM |
1270 | } |
1271 | ||
1272 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1273 | "Return the current buffer as a Lisp object.") | |
1274 | () | |
1275 | { | |
1276 | register Lisp_Object buf; | |
67180c6a | 1277 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1278 | return buf; |
1279 | } | |
1280 | \f | |
c7aa5005 | 1281 | /* Set the current buffer to B. */ |
1ab256cb RM |
1282 | |
1283 | void | |
1284 | set_buffer_internal (b) | |
1285 | register struct buffer *b; | |
1286 | { | |
1287 | register struct buffer *old_buf; | |
1288 | register Lisp_Object tail, valcontents; | |
a7a60ce9 | 1289 | Lisp_Object tem; |
1ab256cb RM |
1290 | |
1291 | if (current_buffer == b) | |
1292 | return; | |
1293 | ||
1294 | windows_or_buffers_changed = 1; | |
c7aa5005 KH |
1295 | set_buffer_internal_1 (b); |
1296 | } | |
1297 | ||
1298 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1299 | This is used by redisplay. */ | |
1300 | ||
1301 | void | |
1302 | set_buffer_internal_1 (b) | |
1303 | register struct buffer *b; | |
1304 | { | |
1305 | register struct buffer *old_buf; | |
1306 | register Lisp_Object tail, valcontents; | |
1307 | Lisp_Object tem; | |
1308 | ||
1309 | if (current_buffer == b) | |
1310 | return; | |
1311 | ||
1ab256cb RM |
1312 | old_buf = current_buffer; |
1313 | current_buffer = b; | |
1314 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1315 | ||
336cd056 RS |
1316 | if (old_buf) |
1317 | { | |
1318 | /* Put the undo list back in the base buffer, so that it appears | |
1319 | that an indirect buffer shares the undo list of its base. */ | |
1320 | if (old_buf->base_buffer) | |
1321 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1322 | ||
1323 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1324 | when it is not current, update them now. */ | |
1325 | if (! NILP (old_buf->pt_marker)) | |
1326 | { | |
1327 | Lisp_Object obuf; | |
1328 | XSETBUFFER (obuf, old_buf); | |
1329 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1330 | } | |
1331 | if (! NILP (old_buf->begv_marker)) | |
1332 | { | |
1333 | Lisp_Object obuf; | |
1334 | XSETBUFFER (obuf, old_buf); | |
1335 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1336 | } | |
1337 | if (! NILP (old_buf->zv_marker)) | |
1338 | { | |
1339 | Lisp_Object obuf; | |
1340 | XSETBUFFER (obuf, old_buf); | |
1341 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | /* Get the undo list from the base buffer, so that it appears | |
1346 | that an indirect buffer shares the undo list of its base. */ | |
1347 | if (b->base_buffer) | |
1348 | b->undo_list = b->base_buffer->undo_list; | |
1349 | ||
1350 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1351 | when it is not current, fetch them now. */ | |
1352 | if (! NILP (b->pt_marker)) | |
1353 | BUF_PT (b) = marker_position (b->pt_marker); | |
1354 | if (! NILP (b->begv_marker)) | |
1355 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1356 | if (! NILP (b->zv_marker)) | |
1357 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1358 | ||
1ab256cb RM |
1359 | /* Look down buffer's list of local Lisp variables |
1360 | to find and update any that forward into C variables. */ | |
1361 | ||
265a9e55 | 1362 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1363 | { |
1364 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1365 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1366 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1367 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1368 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1369 | /* Just reference the variable |
1370 | to cause it to become set for this buffer. */ | |
1371 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1372 | } | |
1373 | ||
1374 | /* Do the same with any others that were local to the previous buffer */ | |
1375 | ||
1376 | if (old_buf) | |
265a9e55 | 1377 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
1ab256cb RM |
1378 | { |
1379 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; | |
a7a60ce9 KH |
1380 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1381 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
fdc6e516 | 1382 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
a7a60ce9 | 1383 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1384 | /* Just reference the variable |
1385 | to cause it to become set for this buffer. */ | |
1386 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); | |
1387 | } | |
1388 | } | |
1389 | ||
336cd056 | 1390 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1391 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1392 | |
1393 | void | |
1394 | set_buffer_temp (b) | |
1395 | struct buffer *b; | |
1396 | { | |
1397 | register struct buffer *old_buf; | |
1398 | ||
1399 | if (current_buffer == b) | |
1400 | return; | |
1401 | ||
1402 | old_buf = current_buffer; | |
1403 | current_buffer = b; | |
1404 | ||
1405 | if (old_buf) | |
1406 | { | |
1407 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1408 | when it is not current, update them now. */ | |
1409 | if (! NILP (old_buf->pt_marker)) | |
1410 | { | |
1411 | Lisp_Object obuf; | |
1412 | XSETBUFFER (obuf, old_buf); | |
1413 | Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf); | |
1414 | } | |
1415 | if (! NILP (old_buf->begv_marker)) | |
1416 | { | |
1417 | Lisp_Object obuf; | |
1418 | XSETBUFFER (obuf, old_buf); | |
1419 | Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf); | |
1420 | } | |
1421 | if (! NILP (old_buf->zv_marker)) | |
1422 | { | |
1423 | Lisp_Object obuf; | |
1424 | XSETBUFFER (obuf, old_buf); | |
1425 | Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf); | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1430 | when it is not current, fetch them now. */ | |
1431 | if (! NILP (b->pt_marker)) | |
1432 | BUF_PT (b) = marker_position (b->pt_marker); | |
1433 | if (! NILP (b->begv_marker)) | |
1434 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1435 | if (! NILP (b->zv_marker)) | |
1436 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1437 | } | |
1438 | ||
1ab256cb RM |
1439 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1440 | "Make the buffer BUFFER current for editing operations.\n\ | |
1441 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1442 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1443 | This function does not display the buffer, so its effect ends\n\ | |
1444 | when the current command terminates.\n\ | |
1445 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1446 | (buffer) |
1447 | register Lisp_Object buffer; | |
1ab256cb | 1448 | { |
a25f13ae KH |
1449 | register Lisp_Object buf; |
1450 | buf = Fget_buffer (buffer); | |
1451 | if (NILP (buf)) | |
1452 | nsberror (buffer); | |
1453 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1454 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1455 | set_buffer_internal (XBUFFER (buf)); |
1456 | return buf; | |
1ab256cb RM |
1457 | } |
1458 | \f | |
1459 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1460 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1461 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1462 | () | |
1463 | { | |
a96b68f1 RS |
1464 | if (!NILP (current_buffer->read_only) |
1465 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1466 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1467 | return Qnil; | |
1468 | } | |
1469 | ||
1470 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1471 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1472 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1473 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1474 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1475 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1476 | selected window if it is displayed there.") | |
a2428fa2 EN |
1477 | (buffer) |
1478 | register Lisp_Object buffer; | |
1ab256cb | 1479 | { |
b271272a | 1480 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1481 | if (NILP (buffer)) |
a5611885 | 1482 | { |
a2428fa2 | 1483 | XSETBUFFER (buffer, current_buffer); |
a5611885 JB |
1484 | |
1485 | /* If we're burying the current buffer, unshow it. */ | |
a2428fa2 | 1486 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil), Qnil); |
a5611885 | 1487 | } |
1ab256cb RM |
1488 | else |
1489 | { | |
1490 | Lisp_Object buf1; | |
1491 | ||
a2428fa2 | 1492 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1493 | if (NILP (buf1)) |
a2428fa2 EN |
1494 | nsberror (buffer); |
1495 | buffer = buf1; | |
b271272a JB |
1496 | } |
1497 | ||
a2428fa2 | 1498 | /* Move buffer to the end of the buffer list. */ |
b271272a JB |
1499 | { |
1500 | register Lisp_Object aelt, link; | |
1501 | ||
a2428fa2 | 1502 | aelt = Frassq (buffer, Vbuffer_alist); |
b271272a JB |
1503 | link = Fmemq (aelt, Vbuffer_alist); |
1504 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1505 | XCONS (link)->cdr = Qnil; | |
1506 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1507 | } | |
1ab256cb | 1508 | |
1ab256cb RM |
1509 | return Qnil; |
1510 | } | |
1511 | \f | |
c922bc55 | 1512 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1513 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1514 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1515 | so the buffer is truly empty after this.") |
1516 | () | |
1517 | { | |
1518 | Fwiden (); | |
1519 | del_range (BEG, Z); | |
1520 | current_buffer->last_window_start = 1; | |
1521 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1522 | if future size is less than past size. Use of erase-buffer | |
1523 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1524 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1525 | return Qnil; |
1526 | } | |
1527 | ||
1528 | validate_region (b, e) | |
1529 | register Lisp_Object *b, *e; | |
1530 | { | |
1ab256cb RM |
1531 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1532 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1533 | ||
1534 | if (XINT (*b) > XINT (*e)) | |
1535 | { | |
03192067 KH |
1536 | Lisp_Object tem; |
1537 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1538 | } |
1539 | ||
1540 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1541 | && XINT (*e) <= ZV)) | |
1542 | args_out_of_range (*b, *e); | |
1543 | } | |
1544 | \f | |
1ab256cb RM |
1545 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
1546 | 0, 0, 0, | |
1547 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
1548 | Most local variable bindings are eliminated so that the default values\n\ | |
1549 | become effective once more. Also, the syntax table is set from\n\ | |
1550 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
1551 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
1552 | This function also forces redisplay of the mode line.\n\ | |
1553 | \n\ | |
1554 | Every function to select a new major mode starts by\n\ | |
1555 | calling this function.\n\n\ | |
1556 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
1557 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
1558 | \n\ | |
1559 | The first thing this function does is run\n\ | |
1560 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
1561 | () |
1562 | { | |
1563 | register Lisp_Object alist, sym, tem; | |
1564 | Lisp_Object oalist; | |
7410477a | 1565 | |
fd186f07 RS |
1566 | if (!NILP (Vrun_hooks)) |
1567 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
1568 | oalist = current_buffer->local_var_alist; |
1569 | ||
2f3f993b RS |
1570 | /* Make sure none of the bindings in oalist |
1571 | remain swapped in, in their symbols. */ | |
1ab256cb | 1572 | |
2f3f993b | 1573 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
1574 | |
1575 | /* Actually eliminate all local bindings of this buffer. */ | |
1576 | ||
13de9290 | 1577 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
1578 | |
1579 | /* Redisplay mode lines; we are changing major mode. */ | |
1580 | ||
1581 | update_mode_lines++; | |
1582 | ||
1583 | /* Any which are supposed to be permanent, | |
1584 | make local again, with the same values they had. */ | |
1585 | ||
265a9e55 | 1586 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
1ab256cb RM |
1587 | { |
1588 | sym = XCONS (XCONS (alist)->car)->car; | |
1589 | tem = Fget (sym, Qpermanent_local); | |
265a9e55 | 1590 | if (! NILP (tem)) |
01050cb5 RM |
1591 | { |
1592 | Fmake_local_variable (sym); | |
1593 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); | |
1594 | } | |
1ab256cb RM |
1595 | } |
1596 | ||
1597 | /* Force mode-line redisplay. Useful here because all major mode | |
1598 | commands call this function. */ | |
1599 | update_mode_lines++; | |
1600 | ||
1601 | return Qnil; | |
1602 | } | |
2f3f993b RS |
1603 | |
1604 | /* Make sure no local variables remain set up with buffer B | |
1605 | for their current values. */ | |
1606 | ||
1607 | static void | |
1608 | swap_out_buffer_local_variables (b) | |
1609 | struct buffer *b; | |
1610 | { | |
1611 | Lisp_Object oalist, alist, sym, tem, buffer; | |
1612 | ||
1613 | XSETBUFFER (buffer, b); | |
1614 | oalist = b->local_var_alist; | |
1615 | ||
1616 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) | |
1617 | { | |
1618 | sym = XCONS (XCONS (alist)->car)->car; | |
1619 | ||
1620 | /* Need not do anything if some other buffer's binding is now encached. */ | |
1621 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; | |
1622 | if (XBUFFER (tem) == current_buffer) | |
1623 | { | |
1624 | /* Symbol is set up for this buffer's old local value. | |
1625 | Set it up for the current buffer with the default value. */ | |
1626 | ||
1627 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; | |
1628 | /* Store the symbol's current value into the alist entry | |
1629 | it is currently set up for. This is so that, if the | |
1630 | local is marked permanent, and we make it local again | |
1631 | later in Fkill_all_local_variables, we don't lose the value. */ | |
1632 | XCONS (XCONS (tem)->car)->cdr | |
1633 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); | |
1634 | /* Switch to the symbol's default-value alist entry. */ | |
1635 | XCONS (tem)->car = tem; | |
1636 | /* Mark it as current for buffer B. */ | |
1637 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car | |
1638 | = buffer; | |
1639 | /* Store the current value into any forwarding in the symbol. */ | |
1640 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, | |
1641 | XCONS (tem)->cdr); | |
1642 | } | |
1643 | } | |
1644 | } | |
1ab256cb | 1645 | \f |
2eec3b4e RS |
1646 | /* Find all the overlays in the current buffer that contain position POS. |
1647 | Return the number found, and store them in a vector in *VEC_PTR. | |
1648 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
1649 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
1650 | or ZV if there are no more overlays. | |
bbbe9545 | 1651 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
239c932b RS |
1652 | or BEGV if there are no previous overlays. |
1653 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2eec3b4e RS |
1654 | |
1655 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
1656 | when this function is called. |
1657 | ||
1658 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1659 | If EXTEND is zero, we never extend the vector, | |
1660 | and we store only as many overlays as will fit. | |
1661 | But we still return the total number of overlays. */ | |
2eec3b4e RS |
1662 | |
1663 | int | |
239c932b | 1664 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2eec3b4e | 1665 | int pos; |
61d54cd5 | 1666 | int extend; |
2eec3b4e RS |
1667 | Lisp_Object **vec_ptr; |
1668 | int *len_ptr; | |
1669 | int *next_ptr; | |
239c932b | 1670 | int *prev_ptr; |
1ab256cb | 1671 | { |
2eec3b4e RS |
1672 | Lisp_Object tail, overlay, start, end, result; |
1673 | int idx = 0; | |
1674 | int len = *len_ptr; | |
1675 | Lisp_Object *vec = *vec_ptr; | |
1676 | int next = ZV; | |
239c932b | 1677 | int prev = BEGV; |
61d54cd5 RS |
1678 | int inhibit_storing = 0; |
1679 | ||
2eec3b4e | 1680 | for (tail = current_buffer->overlays_before; |
8fc0589a | 1681 | GC_CONSP (tail); |
2eec3b4e RS |
1682 | tail = XCONS (tail)->cdr) |
1683 | { | |
239c932b | 1684 | int startpos, endpos; |
52f8ec73 | 1685 | |
2eec3b4e | 1686 | overlay = XCONS (tail)->car; |
1ab256cb | 1687 | |
2eec3b4e RS |
1688 | start = OVERLAY_START (overlay); |
1689 | end = OVERLAY_END (overlay); | |
239c932b RS |
1690 | endpos = OVERLAY_POSITION (end); |
1691 | if (endpos < pos) | |
1692 | { | |
1693 | if (prev < endpos) | |
1694 | prev = endpos; | |
1695 | break; | |
1696 | } | |
1697 | if (endpos == pos) | |
1698 | continue; | |
2eec3b4e RS |
1699 | startpos = OVERLAY_POSITION (start); |
1700 | if (startpos <= pos) | |
1701 | { | |
1702 | if (idx == len) | |
1703 | { | |
61d54cd5 RS |
1704 | /* The supplied vector is full. |
1705 | Either make it bigger, or don't store any more in it. */ | |
1706 | if (extend) | |
1707 | { | |
1708 | *len_ptr = len *= 2; | |
1709 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1710 | *vec_ptr = vec; | |
1711 | } | |
1712 | else | |
1713 | inhibit_storing = 1; | |
2eec3b4e | 1714 | } |
61d54cd5 RS |
1715 | |
1716 | if (!inhibit_storing) | |
1717 | vec[idx] = overlay; | |
1718 | /* Keep counting overlays even if we can't return them all. */ | |
1719 | idx++; | |
2eec3b4e RS |
1720 | } |
1721 | else if (startpos < next) | |
1722 | next = startpos; | |
1723 | } | |
1724 | ||
1725 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 1726 | GC_CONSP (tail); |
2eec3b4e | 1727 | tail = XCONS (tail)->cdr) |
1ab256cb | 1728 | { |
239c932b | 1729 | int startpos, endpos; |
52f8ec73 | 1730 | |
2eec3b4e | 1731 | overlay = XCONS (tail)->car; |
2eec3b4e RS |
1732 | |
1733 | start = OVERLAY_START (overlay); | |
1734 | end = OVERLAY_END (overlay); | |
1735 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 1736 | if (pos < startpos) |
2eec3b4e RS |
1737 | { |
1738 | if (startpos < next) | |
1739 | next = startpos; | |
1740 | break; | |
1741 | } | |
239c932b RS |
1742 | endpos = OVERLAY_POSITION (end); |
1743 | if (pos < endpos) | |
2eec3b4e RS |
1744 | { |
1745 | if (idx == len) | |
1746 | { | |
61d54cd5 RS |
1747 | if (extend) |
1748 | { | |
1749 | *len_ptr = len *= 2; | |
1750 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1751 | *vec_ptr = vec; | |
1752 | } | |
1753 | else | |
1754 | inhibit_storing = 1; | |
2eec3b4e | 1755 | } |
61d54cd5 RS |
1756 | |
1757 | if (!inhibit_storing) | |
1758 | vec[idx] = overlay; | |
1759 | idx++; | |
2eec3b4e | 1760 | } |
239c932b RS |
1761 | else if (endpos < pos && endpos > prev) |
1762 | prev = endpos; | |
1ab256cb RM |
1763 | } |
1764 | ||
239c932b RS |
1765 | if (next_ptr) |
1766 | *next_ptr = next; | |
1767 | if (prev_ptr) | |
1768 | *prev_ptr = prev; | |
2eec3b4e RS |
1769 | return idx; |
1770 | } | |
74514898 RS |
1771 | \f |
1772 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
1773 | or are empty at BEG. |
1774 | ||
74514898 RS |
1775 | Return the number found, and store them in a vector in *VEC_PTR. |
1776 | Store in *LEN_PTR the size allocated for the vector. | |
1777 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
1778 | or ZV if there are no more overlays. | |
1779 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
1780 | or BEGV if there are no previous overlays. | |
1781 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
1782 | ||
1783 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
1784 | when this function is called. | |
1785 | ||
1786 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
1787 | If EXTEND is zero, we never extend the vector, | |
1788 | and we store only as many overlays as will fit. | |
1789 | But we still return the total number of overlays. */ | |
1790 | ||
1791 | int | |
1792 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
1793 | int beg, end; | |
1794 | int extend; | |
1795 | Lisp_Object **vec_ptr; | |
1796 | int *len_ptr; | |
1797 | int *next_ptr; | |
1798 | int *prev_ptr; | |
1799 | { | |
1800 | Lisp_Object tail, overlay, ostart, oend, result; | |
1801 | int idx = 0; | |
1802 | int len = *len_ptr; | |
1803 | Lisp_Object *vec = *vec_ptr; | |
1804 | int next = ZV; | |
1805 | int prev = BEGV; | |
1806 | int inhibit_storing = 0; | |
1807 | ||
1808 | for (tail = current_buffer->overlays_before; | |
1809 | GC_CONSP (tail); | |
1810 | tail = XCONS (tail)->cdr) | |
1811 | { | |
1812 | int startpos, endpos; | |
1813 | ||
1814 | overlay = XCONS (tail)->car; | |
1815 | ||
1816 | ostart = OVERLAY_START (overlay); | |
1817 | oend = OVERLAY_END (overlay); | |
1818 | endpos = OVERLAY_POSITION (oend); | |
1819 | if (endpos < beg) | |
1820 | { | |
1821 | if (prev < endpos) | |
1822 | prev = endpos; | |
1823 | break; | |
1824 | } | |
1825 | startpos = OVERLAY_POSITION (ostart); | |
1826 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 1827 | or is empty at the start of the range. */ |
74514898 | 1828 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1829 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1830 | { |
1831 | if (idx == len) | |
1832 | { | |
1833 | /* The supplied vector is full. | |
1834 | Either make it bigger, or don't store any more in it. */ | |
1835 | if (extend) | |
1836 | { | |
1837 | *len_ptr = len *= 2; | |
1838 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1839 | *vec_ptr = vec; | |
1840 | } | |
1841 | else | |
1842 | inhibit_storing = 1; | |
1843 | } | |
1844 | ||
1845 | if (!inhibit_storing) | |
1846 | vec[idx] = overlay; | |
1847 | /* Keep counting overlays even if we can't return them all. */ | |
1848 | idx++; | |
1849 | } | |
1850 | else if (startpos < next) | |
1851 | next = startpos; | |
1852 | } | |
1853 | ||
1854 | for (tail = current_buffer->overlays_after; | |
1855 | GC_CONSP (tail); | |
1856 | tail = XCONS (tail)->cdr) | |
1857 | { | |
1858 | int startpos, endpos; | |
1859 | ||
1860 | overlay = XCONS (tail)->car; | |
1861 | ||
1862 | ostart = OVERLAY_START (overlay); | |
1863 | oend = OVERLAY_END (overlay); | |
1864 | startpos = OVERLAY_POSITION (ostart); | |
1865 | if (end < startpos) | |
1866 | { | |
1867 | if (startpos < next) | |
1868 | next = startpos; | |
1869 | break; | |
1870 | } | |
1871 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
1872 | /* Count an interval if it either overlaps the range |
1873 | or is empty at the start of the range. */ | |
74514898 | 1874 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 1875 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
1876 | { |
1877 | if (idx == len) | |
1878 | { | |
1879 | if (extend) | |
1880 | { | |
1881 | *len_ptr = len *= 2; | |
1882 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
1883 | *vec_ptr = vec; | |
1884 | } | |
1885 | else | |
1886 | inhibit_storing = 1; | |
1887 | } | |
1888 | ||
1889 | if (!inhibit_storing) | |
1890 | vec[idx] = overlay; | |
1891 | idx++; | |
1892 | } | |
1893 | else if (endpos < beg && endpos > prev) | |
1894 | prev = endpos; | |
1895 | } | |
fc04fa47 | 1896 | |
74514898 RS |
1897 | if (next_ptr) |
1898 | *next_ptr = next; | |
1899 | if (prev_ptr) | |
1900 | *prev_ptr = prev; | |
1901 | return idx; | |
1902 | } | |
1903 | \f | |
fc04fa47 KH |
1904 | /* Fast function to just test if we're at an overlay boundary. */ |
1905 | int | |
1906 | overlay_touches_p (pos) | |
1907 | int pos; | |
1908 | { | |
1909 | Lisp_Object tail, overlay; | |
1910 | ||
1911 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
1912 | tail = XCONS (tail)->cdr) | |
1913 | { | |
1914 | int endpos; | |
1915 | ||
1916 | overlay = XCONS (tail)->car; | |
1917 | if (!GC_OVERLAYP (overlay)) | |
1918 | abort (); | |
1919 | ||
1920 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
1921 | if (endpos < pos) | |
1922 | break; | |
1923 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
1924 | return 1; | |
1925 | } | |
1926 | ||
1927 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
1928 | tail = XCONS (tail)->cdr) | |
1929 | { | |
1930 | int startpos; | |
1931 | ||
1932 | overlay = XCONS (tail)->car; | |
1933 | if (!GC_OVERLAYP (overlay)) | |
1934 | abort (); | |
1935 | ||
1936 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
1937 | if (pos < startpos) | |
1938 | break; | |
1939 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
1940 | return 1; | |
1941 | } | |
1942 | return 0; | |
1943 | } | |
2eec3b4e | 1944 | \f |
5985d248 KH |
1945 | struct sortvec |
1946 | { | |
1947 | Lisp_Object overlay; | |
1948 | int beg, end; | |
1949 | int priority; | |
1950 | }; | |
1951 | ||
1952 | static int | |
1953 | compare_overlays (s1, s2) | |
1954 | struct sortvec *s1, *s2; | |
1955 | { | |
1956 | if (s1->priority != s2->priority) | |
1957 | return s1->priority - s2->priority; | |
1958 | if (s1->beg != s2->beg) | |
1959 | return s1->beg - s2->beg; | |
1960 | if (s1->end != s2->end) | |
1961 | return s2->end - s1->end; | |
1962 | return 0; | |
1963 | } | |
1964 | ||
1965 | /* Sort an array of overlays by priority. The array is modified in place. | |
1966 | The return value is the new size; this may be smaller than the original | |
1967 | size if some of the overlays were invalid or were window-specific. */ | |
1968 | int | |
1969 | sort_overlays (overlay_vec, noverlays, w) | |
1970 | Lisp_Object *overlay_vec; | |
1971 | int noverlays; | |
1972 | struct window *w; | |
1973 | { | |
1974 | int i, j; | |
1975 | struct sortvec *sortvec; | |
1976 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
1977 | ||
1978 | /* Put the valid and relevant overlays into sortvec. */ | |
1979 | ||
1980 | for (i = 0, j = 0; i < noverlays; i++) | |
1981 | { | |
0fa767e7 | 1982 | Lisp_Object tem; |
c99fc30f | 1983 | Lisp_Object overlay; |
5985d248 | 1984 | |
c99fc30f | 1985 | overlay = overlay_vec[i]; |
5985d248 KH |
1986 | if (OVERLAY_VALID (overlay) |
1987 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
1988 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
1989 | { | |
0fa767e7 KH |
1990 | /* If we're interested in a specific window, then ignore |
1991 | overlays that are limited to some other window. */ | |
1992 | if (w) | |
5985d248 | 1993 | { |
0fa767e7 KH |
1994 | Lisp_Object window; |
1995 | ||
1996 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 1997 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 1998 | continue; |
5985d248 | 1999 | } |
0fa767e7 KH |
2000 | |
2001 | /* This overlay is good and counts: put it into sortvec. */ | |
2002 | sortvec[j].overlay = overlay; | |
2003 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2004 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2005 | tem = Foverlay_get (overlay, Qpriority); | |
2006 | if (INTEGERP (tem)) | |
2007 | sortvec[j].priority = XINT (tem); | |
2008 | else | |
2009 | sortvec[j].priority = 0; | |
2010 | j++; | |
5985d248 KH |
2011 | } |
2012 | } | |
2013 | noverlays = j; | |
2014 | ||
2015 | /* Sort the overlays into the proper order: increasing priority. */ | |
2016 | ||
2017 | if (noverlays > 1) | |
2018 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2019 | ||
2020 | for (i = 0; i < noverlays; i++) | |
2021 | overlay_vec[i] = sortvec[i].overlay; | |
2022 | return (noverlays); | |
2023 | } | |
2024 | \f | |
bbbe9545 KH |
2025 | struct sortstr |
2026 | { | |
cb26008f | 2027 | Lisp_Object string, string2; |
bbbe9545 KH |
2028 | int size; |
2029 | int priority; | |
2030 | }; | |
2031 | ||
e8185fa8 KH |
2032 | struct sortstrlist |
2033 | { | |
2034 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2035 | int size; /* Allocated length of that array. */ | |
2036 | int used; /* How much of the array is currently in use. */ | |
2037 | int bytes; /* Total length of the strings in buf. */ | |
2038 | }; | |
2039 | ||
2040 | /* Buffers for storing information about the overlays touching a given | |
2041 | position. These could be automatic variables in overlay_strings, but | |
2042 | it's more efficient to hold onto the memory instead of repeatedly | |
2043 | allocating and freeing it. */ | |
2044 | static struct sortstrlist overlay_heads, overlay_tails; | |
2045 | static char *overlay_str_buf; | |
2046 | ||
2047 | /* Allocated length of overlay_str_buf. */ | |
2048 | static int overlay_str_len; | |
2049 | ||
bbbe9545 KH |
2050 | /* A comparison function suitable for passing to qsort. */ |
2051 | static int | |
2052 | cmp_for_strings (as1, as2) | |
2053 | char *as1, *as2; | |
2054 | { | |
2055 | struct sortstr *s1 = (struct sortstr *)as1; | |
2056 | struct sortstr *s2 = (struct sortstr *)as2; | |
2057 | if (s1->size != s2->size) | |
2058 | return s2->size - s1->size; | |
2059 | if (s1->priority != s2->priority) | |
2060 | return s1->priority - s2->priority; | |
2061 | return 0; | |
2062 | } | |
2063 | ||
e8185fa8 | 2064 | static void |
cb26008f | 2065 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2066 | struct sortstrlist *ssl; |
cb26008f | 2067 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2068 | int size; |
2069 | { | |
2070 | if (ssl->used == ssl->size) | |
2071 | { | |
2072 | if (ssl->buf) | |
2073 | ssl->size *= 2; | |
2074 | else | |
2075 | ssl->size = 5; | |
2076 | ssl->buf = ((struct sortstr *) | |
2077 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2078 | } | |
2079 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2080 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2081 | ssl->buf[ssl->used].size = size; |
2082 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2083 | ssl->used++; | |
2084 | ssl->bytes += XSTRING (str)->size; | |
cb26008f KH |
2085 | if (STRINGP (str2)) |
2086 | ssl->bytes += XSTRING (str2)->size; | |
e8185fa8 | 2087 | } |
bbbe9545 KH |
2088 | |
2089 | /* Return the concatenation of the strings associated with overlays that | |
2090 | begin or end at POS, ignoring overlays that are specific to a window | |
2091 | other than W. The strings are concatenated in the appropriate order: | |
2092 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2093 | lower. Normally all of the after-strings come first, but zero-sized |
2094 | overlays have their after-strings ride along with the before-strings | |
2095 | because it would look strange to print them inside-out. | |
2096 | ||
2097 | Returns the string length, and stores the contents indirectly through | |
2098 | PSTR, if that variable is non-null. The string may be overwritten by | |
2099 | subsequent calls. */ | |
bbbe9545 KH |
2100 | int |
2101 | overlay_strings (pos, w, pstr) | |
2102 | int pos; | |
2103 | struct window *w; | |
2104 | char **pstr; | |
2105 | { | |
e8185fa8 | 2106 | Lisp_Object ov, overlay, window, str; |
bbbe9545 KH |
2107 | int startpos, endpos; |
2108 | ||
e8185fa8 KH |
2109 | overlay_heads.used = overlay_heads.bytes = 0; |
2110 | overlay_tails.used = overlay_tails.bytes = 0; | |
bbbe9545 KH |
2111 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
2112 | { | |
2113 | overlay = XCONS (ov)->car; | |
2114 | if (!OVERLAYP (overlay)) | |
2115 | abort (); | |
2116 | ||
2117 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2118 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2119 | if (endpos < pos) | |
2120 | break; | |
2121 | if (endpos != pos && startpos != pos) | |
2122 | continue; | |
2123 | window = Foverlay_get (overlay, Qwindow); | |
2124 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2125 | continue; | |
e8185fa8 KH |
2126 | if (startpos == pos |
2127 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2128 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2129 | (startpos == endpos |
2130 | ? Foverlay_get (overlay, Qafter_string) | |
2131 | : Qnil), | |
2132 | Foverlay_get (overlay, Qpriority), | |
2133 | endpos - startpos); | |
2134 | else if (endpos == pos | |
2135 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2136 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2137 | Foverlay_get (overlay, Qpriority), |
2138 | endpos - startpos); | |
bbbe9545 KH |
2139 | } |
2140 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) | |
2141 | { | |
2142 | overlay = XCONS (ov)->car; | |
2143 | if (!OVERLAYP (overlay)) | |
2144 | abort (); | |
2145 | ||
2146 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2147 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2148 | if (startpos > pos) | |
2149 | break; | |
e8185fa8 KH |
2150 | if (endpos != pos && startpos != pos) |
2151 | continue; | |
2152 | window = Foverlay_get (overlay, Qwindow); | |
2153 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2154 | continue; | |
e8185fa8 KH |
2155 | if (startpos == pos |
2156 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2157 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2158 | (startpos == endpos |
2159 | ? Foverlay_get (overlay, Qafter_string) | |
2160 | : Qnil), | |
2161 | Foverlay_get (overlay, Qpriority), | |
2162 | endpos - startpos); | |
2163 | else if (endpos == pos | |
2164 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2165 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2166 | Foverlay_get (overlay, Qpriority), |
2167 | endpos - startpos); | |
bbbe9545 | 2168 | } |
e8185fa8 KH |
2169 | if (overlay_tails.used > 1) |
2170 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2171 | cmp_for_strings); | |
2172 | if (overlay_heads.used > 1) | |
2173 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2174 | cmp_for_strings); | |
2175 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2176 | { |
e8185fa8 | 2177 | Lisp_Object tem; |
bbbe9545 KH |
2178 | int i; |
2179 | char *p; | |
e8185fa8 | 2180 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2181 | |
2182 | if (total > overlay_str_len) | |
e8185fa8 KH |
2183 | overlay_str_buf = (char *)xrealloc (overlay_str_buf, |
2184 | overlay_str_len = total); | |
bbbe9545 | 2185 | p = overlay_str_buf; |
e8185fa8 | 2186 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2187 | { |
e8185fa8 | 2188 | tem = overlay_tails.buf[i].string; |
bbbe9545 KH |
2189 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2190 | p += XSTRING (tem)->size; | |
2191 | } | |
e8185fa8 | 2192 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2193 | { |
e8185fa8 | 2194 | tem = overlay_heads.buf[i].string; |
bbbe9545 KH |
2195 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
2196 | p += XSTRING (tem)->size; | |
cb26008f KH |
2197 | tem = overlay_heads.buf[i].string2; |
2198 | if (STRINGP (tem)) | |
2199 | { | |
2200 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); | |
2201 | p += XSTRING (tem)->size; | |
2202 | } | |
bbbe9545 | 2203 | } |
cb26008f KH |
2204 | if (p != overlay_str_buf + total) |
2205 | abort (); | |
bbbe9545 KH |
2206 | if (pstr) |
2207 | *pstr = overlay_str_buf; | |
e8185fa8 | 2208 | return total; |
bbbe9545 | 2209 | } |
e8185fa8 | 2210 | return 0; |
bbbe9545 KH |
2211 | } |
2212 | \f | |
5c4f68f1 | 2213 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2214 | |
2eec3b4e | 2215 | void |
5c4f68f1 JB |
2216 | recenter_overlay_lists (buf, pos) |
2217 | struct buffer *buf; | |
2eec3b4e RS |
2218 | int pos; |
2219 | { | |
2220 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2221 | ||
2222 | /* See if anything in overlays_before should move to overlays_after. */ | |
2223 | ||
2224 | /* We don't strictly need prev in this loop; it should always be nil. | |
2225 | But we use it for symmetry and in case that should cease to be true | |
2226 | with some future change. */ | |
2227 | prev = Qnil; | |
5c4f68f1 | 2228 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2229 | CONSP (tail); |
2230 | prev = tail, tail = next) | |
1ab256cb | 2231 | { |
2eec3b4e RS |
2232 | next = XCONS (tail)->cdr; |
2233 | overlay = XCONS (tail)->car; | |
2234 | ||
2235 | /* If the overlay is not valid, get rid of it. */ | |
2236 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2237 | #if 1 |
2238 | abort (); | |
2239 | #else | |
2eec3b4e RS |
2240 | { |
2241 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2242 | if (!NILP (prev)) | |
2243 | XCONS (prev)->cdr = next; | |
2244 | else | |
5c4f68f1 | 2245 | buf->overlays_before = next; |
2eec3b4e RS |
2246 | tail = prev; |
2247 | continue; | |
2248 | } | |
52f8ec73 | 2249 | #endif |
1ab256cb | 2250 | |
2eec3b4e RS |
2251 | beg = OVERLAY_START (overlay); |
2252 | end = OVERLAY_END (overlay); | |
1ab256cb | 2253 | |
2eec3b4e | 2254 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2255 | { |
2eec3b4e RS |
2256 | /* OVERLAY needs to be moved. */ |
2257 | int where = OVERLAY_POSITION (beg); | |
2258 | Lisp_Object other, other_prev; | |
2259 | ||
2260 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2261 | if (!NILP (prev)) | |
2262 | XCONS (prev)->cdr = next; | |
2263 | else | |
5c4f68f1 | 2264 | buf->overlays_before = next; |
2eec3b4e RS |
2265 | |
2266 | /* Search thru overlays_after for where to put it. */ | |
2267 | other_prev = Qnil; | |
5c4f68f1 | 2268 | for (other = buf->overlays_after; |
2eec3b4e RS |
2269 | CONSP (other); |
2270 | other_prev = other, other = XCONS (other)->cdr) | |
1ab256cb | 2271 | { |
2eec3b4e RS |
2272 | Lisp_Object otherbeg, otheroverlay, follower; |
2273 | int win; | |
2274 | ||
2275 | otheroverlay = XCONS (other)->car; | |
2276 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2277 | abort (); |
2eec3b4e RS |
2278 | |
2279 | otherbeg = OVERLAY_START (otheroverlay); | |
2280 | if (OVERLAY_POSITION (otherbeg) >= where) | |
2281 | break; | |
1ab256cb | 2282 | } |
2eec3b4e RS |
2283 | |
2284 | /* Add TAIL to overlays_after before OTHER. */ | |
2285 | XCONS (tail)->cdr = other; | |
2286 | if (!NILP (other_prev)) | |
2287 | XCONS (other_prev)->cdr = tail; | |
1ab256cb | 2288 | else |
5c4f68f1 | 2289 | buf->overlays_after = tail; |
2eec3b4e | 2290 | tail = prev; |
1ab256cb | 2291 | } |
2eec3b4e RS |
2292 | else |
2293 | /* We've reached the things that should stay in overlays_before. | |
2294 | All the rest of overlays_before must end even earlier, | |
2295 | so stop now. */ | |
2296 | break; | |
2297 | } | |
2298 | ||
2299 | /* See if anything in overlays_after should be in overlays_before. */ | |
2300 | prev = Qnil; | |
5c4f68f1 | 2301 | for (tail = buf->overlays_after; |
2eec3b4e RS |
2302 | CONSP (tail); |
2303 | prev = tail, tail = next) | |
2304 | { | |
2305 | next = XCONS (tail)->cdr; | |
2306 | overlay = XCONS (tail)->car; | |
2307 | ||
2308 | /* If the overlay is not valid, get rid of it. */ | |
2309 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2310 | #if 1 |
2311 | abort (); | |
2312 | #else | |
2eec3b4e RS |
2313 | { |
2314 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2315 | if (!NILP (prev)) | |
2316 | XCONS (prev)->cdr = next; | |
2317 | else | |
5c4f68f1 | 2318 | buf->overlays_after = next; |
2eec3b4e RS |
2319 | tail = prev; |
2320 | continue; | |
2321 | } | |
52f8ec73 | 2322 | #endif |
2eec3b4e RS |
2323 | |
2324 | beg = OVERLAY_START (overlay); | |
2325 | end = OVERLAY_END (overlay); | |
2326 | ||
2327 | /* Stop looking, when we know that nothing further | |
2328 | can possibly end before POS. */ | |
2329 | if (OVERLAY_POSITION (beg) > pos) | |
2330 | break; | |
2331 | ||
2332 | if (OVERLAY_POSITION (end) <= pos) | |
2333 | { | |
2334 | /* OVERLAY needs to be moved. */ | |
2335 | int where = OVERLAY_POSITION (end); | |
2336 | Lisp_Object other, other_prev; | |
2337 | ||
2338 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2339 | if (!NILP (prev)) | |
2340 | XCONS (prev)->cdr = next; | |
2341 | else | |
5c4f68f1 | 2342 | buf->overlays_after = next; |
2eec3b4e RS |
2343 | |
2344 | /* Search thru overlays_before for where to put it. */ | |
2345 | other_prev = Qnil; | |
5c4f68f1 | 2346 | for (other = buf->overlays_before; |
2eec3b4e RS |
2347 | CONSP (other); |
2348 | other_prev = other, other = XCONS (other)->cdr) | |
2349 | { | |
2350 | Lisp_Object otherend, otheroverlay; | |
2351 | int win; | |
2352 | ||
2353 | otheroverlay = XCONS (other)->car; | |
2354 | if (! OVERLAY_VALID (otheroverlay)) | |
52f8ec73 | 2355 | abort (); |
2eec3b4e RS |
2356 | |
2357 | otherend = OVERLAY_END (otheroverlay); | |
2358 | if (OVERLAY_POSITION (otherend) <= where) | |
2359 | break; | |
2360 | } | |
2361 | ||
2362 | /* Add TAIL to overlays_before before OTHER. */ | |
2363 | XCONS (tail)->cdr = other; | |
2364 | if (!NILP (other_prev)) | |
2365 | XCONS (other_prev)->cdr = tail; | |
2366 | else | |
5c4f68f1 | 2367 | buf->overlays_before = tail; |
2eec3b4e RS |
2368 | tail = prev; |
2369 | } | |
2370 | } | |
2371 | ||
8d7a4592 | 2372 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 2373 | } |
2b1bdf65 | 2374 | |
423cdb46 KH |
2375 | void |
2376 | adjust_overlays_for_insert (pos, length) | |
2377 | int pos; | |
2378 | int length; | |
2379 | { | |
2380 | /* After an insertion, the lists are still sorted properly, | |
2381 | but we may need to update the value of the overlay center. */ | |
2382 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
2383 | XSETFASTINT (current_buffer->overlay_center, | |
2384 | XFASTINT (current_buffer->overlay_center) + length); | |
2385 | } | |
2386 | ||
2387 | void | |
2388 | adjust_overlays_for_delete (pos, length) | |
2389 | int pos; | |
2390 | int length; | |
2391 | { | |
2392 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
2393 | /* The deletion was to our right. No change needed; the before- and | |
2394 | after-lists are still consistent. */ | |
2395 | ; | |
2396 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
2397 | /* The deletion was to our left. We need to adjust the center value | |
2398 | to account for the change in position, but the lists are consistent | |
2399 | given the new value. */ | |
2400 | XSETFASTINT (current_buffer->overlay_center, | |
2401 | XFASTINT (current_buffer->overlay_center) - length); | |
2402 | else | |
2403 | /* We're right in the middle. There might be things on the after-list | |
2404 | that now belong on the before-list. Recentering will move them, | |
2405 | and also update the center point. */ | |
2406 | recenter_overlay_lists (current_buffer, pos); | |
2407 | } | |
2408 | ||
2b1bdf65 KH |
2409 | /* Fix up overlays that were garbled as a result of permuting markers |
2410 | in the range START through END. Any overlay with at least one | |
2411 | endpoint in this range will need to be unlinked from the overlay | |
2412 | list and reinserted in its proper place. | |
2413 | Such an overlay might even have negative size at this point. | |
2414 | If so, we'll reverse the endpoints. Can you think of anything | |
2415 | better to do in this situation? */ | |
2416 | void | |
2417 | fix_overlays_in_range (start, end) | |
2418 | register int start, end; | |
2419 | { | |
2420 | Lisp_Object tem, overlay; | |
2421 | Lisp_Object before_list, after_list; | |
2422 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
2423 | int startpos, endpos; | |
2424 | ||
2425 | /* This algorithm shifts links around instead of consing and GCing. | |
2426 | The loop invariant is that before_list (resp. after_list) is a | |
2427 | well-formed list except that its last element, the one that | |
2428 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
2429 | So it's not a bug that before_list isn't initialized, although | |
2430 | it may look strange. */ | |
2431 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
2432 | { | |
2433 | overlay = XCONS (*ptail)->car; | |
2434 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2435 | if (endpos < start) | |
2436 | break; | |
2437 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2438 | if (endpos < end | |
2439 | || (startpos >= start && startpos < end)) | |
2440 | { | |
2441 | /* If the overlay is backwards, fix that now. */ | |
2442 | if (startpos > endpos) | |
2443 | { | |
2444 | int tem; | |
2445 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2446 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2447 | tem = startpos; startpos = endpos; endpos = tem; | |
2448 | } | |
2449 | /* Add it to the end of the wrong list. Later on, | |
2450 | recenter_overlay_lists will move it to the right place. */ | |
2451 | if (endpos < XINT (current_buffer->overlay_center)) | |
2452 | { | |
2453 | *pafter = *ptail; | |
2454 | pafter = &XCONS (*ptail)->cdr; | |
2455 | } | |
2456 | else | |
2457 | { | |
2458 | *pbefore = *ptail; | |
2459 | pbefore = &XCONS (*ptail)->cdr; | |
2460 | } | |
2461 | *ptail = XCONS (*ptail)->cdr; | |
2462 | } | |
2463 | else | |
2464 | ptail = &XCONS (*ptail)->cdr; | |
2465 | } | |
2466 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
2467 | { | |
2468 | overlay = XCONS (*ptail)->car; | |
2469 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2470 | if (startpos >= end) | |
2471 | break; | |
2472 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2473 | if (startpos >= start | |
2474 | || (endpos >= start && endpos < end)) | |
2475 | { | |
2476 | if (startpos > endpos) | |
2477 | { | |
2478 | int tem; | |
2479 | Fset_marker (OVERLAY_START (overlay), endpos, Qnil); | |
2480 | Fset_marker (OVERLAY_END (overlay), startpos, Qnil); | |
2481 | tem = startpos; startpos = endpos; endpos = tem; | |
2482 | } | |
2483 | if (endpos < XINT (current_buffer->overlay_center)) | |
2484 | { | |
2485 | *pafter = *ptail; | |
2486 | pafter = &XCONS (*ptail)->cdr; | |
2487 | } | |
2488 | else | |
2489 | { | |
2490 | *pbefore = *ptail; | |
2491 | pbefore = &XCONS (*ptail)->cdr; | |
2492 | } | |
2493 | *ptail = XCONS (*ptail)->cdr; | |
2494 | } | |
2495 | else | |
2496 | ptail = &XCONS (*ptail)->cdr; | |
2497 | } | |
2498 | ||
2499 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
2500 | and let the recenter function make it sane again. */ | |
2501 | *pbefore = current_buffer->overlays_before; | |
2502 | current_buffer->overlays_before = before_list; | |
2503 | recenter_overlay_lists (current_buffer, | |
2504 | XINT (current_buffer->overlay_center)); | |
2505 | ||
2506 | *pafter = current_buffer->overlays_after; | |
2507 | current_buffer->overlays_after = after_list; | |
2508 | recenter_overlay_lists (current_buffer, | |
2509 | XINT (current_buffer->overlay_center)); | |
2510 | } | |
2eec3b4e | 2511 | \f |
52f8ec73 JB |
2512 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
2513 | "Return t if OBJECT is an overlay.") | |
2514 | (object) | |
2515 | Lisp_Object object; | |
2516 | { | |
2517 | return (OVERLAYP (object) ? Qt : Qnil); | |
2518 | } | |
2519 | ||
acac2700 | 2520 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
2521 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
2522 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
2523 | BEG and END may be integers or markers.\n\ |
2524 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
2525 | front delimiter advance when text is inserted there.\n\ | |
2526 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
2527 | rear delimiter advance when text is inserted there.") | |
2528 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 2529 | Lisp_Object beg, end, buffer; |
acac2700 | 2530 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
2531 | { |
2532 | Lisp_Object overlay; | |
5c4f68f1 | 2533 | struct buffer *b; |
2eec3b4e | 2534 | |
5c4f68f1 | 2535 | if (NILP (buffer)) |
67180c6a | 2536 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
2537 | else |
2538 | CHECK_BUFFER (buffer, 2); | |
2539 | if (MARKERP (beg) | |
2540 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2541 | error ("Marker points into wrong buffer"); | |
2542 | if (MARKERP (end) | |
2543 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2544 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 2545 | |
883047b9 JB |
2546 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2547 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 2548 | |
883047b9 | 2549 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 2550 | { |
c99fc30f KH |
2551 | Lisp_Object temp; |
2552 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 2553 | } |
883047b9 JB |
2554 | |
2555 | b = XBUFFER (buffer); | |
2556 | ||
2557 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
2558 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 2559 | |
acac2700 RS |
2560 | if (!NILP (front_advance)) |
2561 | XMARKER (beg)->insertion_type = 1; | |
2562 | if (!NILP (rear_advance)) | |
2563 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 2564 | |
48e2e3ba | 2565 | overlay = allocate_misc (); |
89ca3e1b | 2566 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
2567 | XOVERLAY (overlay)->start = beg; |
2568 | XOVERLAY (overlay)->end = end; | |
2569 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
2570 | |
2571 | /* Put the new overlay on the wrong list. */ | |
2572 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2573 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2574 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2575 | else |
5c4f68f1 | 2576 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2577 | |
2578 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2579 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2580 | |
b61982dd JB |
2581 | /* We don't need to redisplay the region covered by the overlay, because |
2582 | the overlay has no properties at the moment. */ | |
2583 | ||
2eec3b4e RS |
2584 | return overlay; |
2585 | } | |
2586 | ||
5c4f68f1 JB |
2587 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
2588 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
2589 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
2590 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
2591 | buffer.") | |
5c4f68f1 JB |
2592 | (overlay, beg, end, buffer) |
2593 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 2594 | { |
0a4469c9 RS |
2595 | struct buffer *b, *ob; |
2596 | Lisp_Object obuffer; | |
2597 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 2598 | |
52f8ec73 | 2599 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
2600 | if (NILP (buffer)) |
2601 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 2602 | if (NILP (buffer)) |
67180c6a | 2603 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 2604 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
2605 | |
2606 | if (MARKERP (beg) | |
2607 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
2608 | error ("Marker points into wrong buffer"); | |
2609 | if (MARKERP (end) | |
2610 | && ! EQ (Fmarker_buffer (end), buffer)) | |
2611 | error ("Marker points into wrong buffer"); | |
2612 | ||
b61982dd JB |
2613 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
2614 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
2615 | ||
9d7608b7 KH |
2616 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
2617 | return Fdelete_overlay (overlay); | |
0a4469c9 | 2618 | |
b61982dd JB |
2619 | if (XINT (beg) > XINT (end)) |
2620 | { | |
c99fc30f KH |
2621 | Lisp_Object temp; |
2622 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
2623 | } |
2624 | ||
9d7608b7 KH |
2625 | specbind (Qinhibit_quit, Qt); |
2626 | ||
0a4469c9 | 2627 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 2628 | b = XBUFFER (buffer); |
0a4469c9 | 2629 | ob = XBUFFER (obuffer); |
2eec3b4e | 2630 | |
c82ed728 | 2631 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 2632 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
2633 | { |
2634 | /* Redisplay where the overlay was. */ | |
2635 | if (!NILP (obuffer)) | |
2636 | { | |
2637 | Lisp_Object o_beg; | |
2638 | Lisp_Object o_end; | |
2639 | ||
2640 | o_beg = OVERLAY_START (overlay); | |
2641 | o_end = OVERLAY_END (overlay); | |
2642 | o_beg = OVERLAY_POSITION (o_beg); | |
2643 | o_end = OVERLAY_POSITION (o_end); | |
2644 | ||
efd90478 | 2645 | redisplay_region (ob, XINT (o_beg), XINT (o_end)); |
50760c4a RS |
2646 | } |
2647 | ||
2648 | /* Redisplay where the overlay is going to be. */ | |
efd90478 | 2649 | redisplay_region (b, XINT (beg), XINT (end)); |
50760c4a | 2650 | } |
c82ed728 JB |
2651 | else |
2652 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
2653 | { | |
be8b1c6b RS |
2654 | Lisp_Object o_beg; |
2655 | Lisp_Object o_end; | |
c82ed728 JB |
2656 | int change_beg, change_end; |
2657 | ||
be8b1c6b RS |
2658 | o_beg = OVERLAY_START (overlay); |
2659 | o_end = OVERLAY_END (overlay); | |
c82ed728 JB |
2660 | o_beg = OVERLAY_POSITION (o_beg); |
2661 | o_end = OVERLAY_POSITION (o_end); | |
2662 | ||
2663 | if (XINT (o_beg) == XINT (beg)) | |
2664 | redisplay_region (b, XINT (o_end), XINT (end)); | |
2665 | else if (XINT (o_end) == XINT (end)) | |
2666 | redisplay_region (b, XINT (o_beg), XINT (beg)); | |
2667 | else | |
2668 | { | |
2669 | if (XINT (beg) < XINT (o_beg)) o_beg = beg; | |
2670 | if (XINT (end) > XINT (o_end)) o_end = end; | |
2671 | redisplay_region (b, XINT (o_beg), XINT (o_end)); | |
2672 | } | |
2673 | } | |
b61982dd | 2674 | |
0a4469c9 RS |
2675 | if (!NILP (obuffer)) |
2676 | { | |
2677 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
2678 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
2679 | } | |
5c4f68f1 JB |
2680 | |
2681 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
2682 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
2683 | |
2684 | /* Put the overlay on the wrong list. */ | |
2685 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
2686 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
2687 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 2688 | else |
5c4f68f1 | 2689 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
2690 | |
2691 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 2692 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 2693 | |
0a4469c9 | 2694 | return unbind_to (count, overlay); |
2eec3b4e RS |
2695 | } |
2696 | ||
2697 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 2698 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 2699 | (overlay) |
5c4f68f1 | 2700 | Lisp_Object overlay; |
2eec3b4e | 2701 | { |
0a4469c9 | 2702 | Lisp_Object buffer; |
5c4f68f1 | 2703 | struct buffer *b; |
0a4469c9 | 2704 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 2705 | |
52f8ec73 JB |
2706 | CHECK_OVERLAY (overlay, 0); |
2707 | ||
0a4469c9 RS |
2708 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
2709 | if (NILP (buffer)) | |
2710 | return Qnil; | |
2711 | ||
2712 | b = XBUFFER (buffer); | |
2713 | ||
2714 | specbind (Qinhibit_quit, Qt); | |
5c4f68f1 JB |
2715 | |
2716 | b->overlays_before = Fdelq (overlay, b->overlays_before); | |
2717 | b->overlays_after = Fdelq (overlay, b->overlays_after); | |
2718 | ||
b61982dd | 2719 | redisplay_region (b, |
a927f5c9 RS |
2720 | marker_position (OVERLAY_START (overlay)), |
2721 | marker_position (OVERLAY_END (overlay))); | |
b61982dd | 2722 | |
3ece337a JB |
2723 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
2724 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
2725 | ||
0a4469c9 | 2726 | return unbind_to (count, Qnil); |
2eec3b4e RS |
2727 | } |
2728 | \f | |
8ebafa8d JB |
2729 | /* Overlay dissection functions. */ |
2730 | ||
2731 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
2732 | "Return the position at which OVERLAY starts.") | |
2733 | (overlay) | |
2734 | Lisp_Object overlay; | |
2735 | { | |
2736 | CHECK_OVERLAY (overlay, 0); | |
2737 | ||
2738 | return (Fmarker_position (OVERLAY_START (overlay))); | |
2739 | } | |
2740 | ||
2741 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
2742 | "Return the position at which OVERLAY ends.") | |
2743 | (overlay) | |
2744 | Lisp_Object overlay; | |
2745 | { | |
2746 | CHECK_OVERLAY (overlay, 0); | |
2747 | ||
2748 | return (Fmarker_position (OVERLAY_END (overlay))); | |
2749 | } | |
2750 | ||
2751 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
2752 | "Return the buffer OVERLAY belongs to.") | |
2753 | (overlay) | |
2754 | Lisp_Object overlay; | |
2755 | { | |
2756 | CHECK_OVERLAY (overlay, 0); | |
2757 | ||
2758 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
2759 | } | |
2760 | ||
2761 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
2762 | "Return a list of the properties on OVERLAY.\n\ | |
2763 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
2764 | OVERLAY.") | |
2765 | (overlay) | |
2766 | Lisp_Object overlay; | |
2767 | { | |
2768 | CHECK_OVERLAY (overlay, 0); | |
2769 | ||
48e2e3ba | 2770 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
2771 | } |
2772 | ||
2773 | \f | |
2eec3b4e | 2774 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 2775 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
2776 | (pos) |
2777 | Lisp_Object pos; | |
2778 | { | |
2779 | int noverlays; | |
2eec3b4e RS |
2780 | Lisp_Object *overlay_vec; |
2781 | int len; | |
2782 | Lisp_Object result; | |
2783 | ||
2784 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2785 | ||
2786 | len = 10; | |
2787 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2788 | ||
2789 | /* Put all the overlays we want in a vector in overlay_vec. | |
2790 | Store the length in len. */ | |
2a77a7d7 RS |
2791 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2792 | (int *) 0, (int *) 0); | |
2eec3b4e RS |
2793 | |
2794 | /* Make a list of them all. */ | |
2795 | result = Flist (noverlays, overlay_vec); | |
2796 | ||
9ac0d9e0 | 2797 | xfree (overlay_vec); |
2eec3b4e RS |
2798 | return result; |
2799 | } | |
2800 | ||
74514898 | 2801 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
2802 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
2803 | Overlap means that at least one character is contained within the overlay\n\ | |
2804 | and also contained within the specified region.\n\ | |
2805 | Empty overlays are included in the result if they are located at BEG\n\ | |
2806 | or between BEG and END.") | |
74514898 RS |
2807 | (beg, end) |
2808 | Lisp_Object beg, end; | |
2809 | { | |
2810 | int noverlays; | |
2811 | Lisp_Object *overlay_vec; | |
2812 | int len; | |
2813 | Lisp_Object result; | |
2814 | ||
2815 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
2816 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
2817 | ||
2818 | len = 10; | |
2819 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2820 | ||
2821 | /* Put all the overlays we want in a vector in overlay_vec. | |
2822 | Store the length in len. */ | |
2823 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
2824 | (int *) 0, (int *) 0); | |
2825 | ||
2826 | /* Make a list of them all. */ | |
2827 | result = Flist (noverlays, overlay_vec); | |
2828 | ||
2829 | xfree (overlay_vec); | |
2830 | return result; | |
2831 | } | |
2832 | ||
2eec3b4e RS |
2833 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
2834 | 1, 1, 0, | |
bbe20e81 KH |
2835 | "Return the next position after POS where an overlay starts or ends.\n\ |
2836 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
2837 | (pos) |
2838 | Lisp_Object pos; | |
2839 | { | |
2840 | int noverlays; | |
2841 | int endpos; | |
2842 | Lisp_Object *overlay_vec; | |
2843 | int len; | |
2eec3b4e RS |
2844 | int i; |
2845 | ||
2846 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2847 | ||
2848 | len = 10; | |
2849 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2850 | ||
2851 | /* Put all the overlays we want in a vector in overlay_vec. | |
2852 | Store the length in len. | |
2853 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 RS |
2854 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2855 | &endpos, (int *) 0); | |
2eec3b4e RS |
2856 | |
2857 | /* If any of these overlays ends before endpos, | |
2858 | use its ending point instead. */ | |
2859 | for (i = 0; i < noverlays; i++) | |
2860 | { | |
2861 | Lisp_Object oend; | |
2862 | int oendpos; | |
2863 | ||
2864 | oend = OVERLAY_END (overlay_vec[i]); | |
2865 | oendpos = OVERLAY_POSITION (oend); | |
2866 | if (oendpos < endpos) | |
2867 | endpos = oendpos; | |
1ab256cb RM |
2868 | } |
2869 | ||
9ac0d9e0 | 2870 | xfree (overlay_vec); |
2eec3b4e RS |
2871 | return make_number (endpos); |
2872 | } | |
239c932b RS |
2873 | |
2874 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
2875 | Sprevious_overlay_change, 1, 1, 0, | |
2876 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 2877 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
2878 | (pos) |
2879 | Lisp_Object pos; | |
2880 | { | |
2881 | int noverlays; | |
2882 | int prevpos; | |
2883 | Lisp_Object *overlay_vec; | |
2884 | int len; | |
2885 | int i; | |
624bbdc4 | 2886 | Lisp_Object tail; |
239c932b RS |
2887 | |
2888 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2889 | ||
2890 | len = 10; | |
2891 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
2892 | ||
624bbdc4 RS |
2893 | /* At beginning of buffer, we know the answer; |
2894 | avoid bug subtracting 1 below. */ | |
2895 | if (XINT (pos) == BEGV) | |
2896 | return pos; | |
2897 | ||
239c932b RS |
2898 | /* Put all the overlays we want in a vector in overlay_vec. |
2899 | Store the length in len. | |
2900 | prevpos gets the position of an overlay end. */ | |
2a77a7d7 RS |
2901 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
2902 | (int *) 0, &prevpos); | |
239c932b | 2903 | |
624bbdc4 | 2904 | /* If any of these overlays starts after prevpos, |
239c932b RS |
2905 | maybe use its starting point instead. */ |
2906 | for (i = 0; i < noverlays; i++) | |
2907 | { | |
2908 | Lisp_Object ostart; | |
2909 | int ostartpos; | |
2910 | ||
2911 | ostart = OVERLAY_START (overlay_vec[i]); | |
2912 | ostartpos = OVERLAY_POSITION (ostart); | |
2913 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2914 | prevpos = ostartpos; | |
2915 | } | |
2916 | ||
624bbdc4 RS |
2917 | /* If any overlay ends at pos, consider its starting point too. */ |
2918 | for (tail = current_buffer->overlays_before; | |
2919 | GC_CONSP (tail); | |
2920 | tail = XCONS (tail)->cdr) | |
2921 | { | |
2922 | Lisp_Object overlay, ostart; | |
2923 | int ostartpos; | |
2924 | ||
2925 | overlay = XCONS (tail)->car; | |
2926 | ||
2927 | ostart = OVERLAY_START (overlay); | |
2928 | ostartpos = OVERLAY_POSITION (ostart); | |
2929 | if (ostartpos > prevpos && ostartpos < XINT (pos)) | |
2930 | prevpos = ostartpos; | |
2931 | } | |
2932 | ||
239c932b RS |
2933 | xfree (overlay_vec); |
2934 | return make_number (prevpos); | |
2935 | } | |
2eec3b4e RS |
2936 | \f |
2937 | /* These functions are for debugging overlays. */ | |
2938 | ||
2939 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
2940 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
2941 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 2942 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
2943 | Recentering overlays moves overlays between these lists.\n\ |
2944 | The lists you get are copies, so that changing them has no effect.\n\ | |
2945 | However, the overlays you get are the real objects that the buffer uses.") | |
2946 | () | |
2947 | { | |
2948 | Lisp_Object before, after; | |
2949 | before = current_buffer->overlays_before; | |
2950 | if (CONSP (before)) | |
2951 | before = Fcopy_sequence (before); | |
2952 | after = current_buffer->overlays_after; | |
2953 | if (CONSP (after)) | |
2954 | after = Fcopy_sequence (after); | |
2955 | ||
2956 | return Fcons (before, after); | |
2957 | } | |
2958 | ||
2959 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
2960 | "Recenter the overlays of the current buffer around position POS.") | |
2961 | (pos) | |
2962 | Lisp_Object pos; | |
2963 | { | |
2964 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
2965 | ||
5c4f68f1 | 2966 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
2967 | return Qnil; |
2968 | } | |
2969 | \f | |
2970 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 2971 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
2972 | (overlay, prop) |
2973 | Lisp_Object overlay, prop; | |
2974 | { | |
cab4777e | 2975 | Lisp_Object plist, fallback; |
52f8ec73 JB |
2976 | |
2977 | CHECK_OVERLAY (overlay, 0); | |
2978 | ||
cab4777e RS |
2979 | fallback = Qnil; |
2980 | ||
48e2e3ba | 2981 | for (plist = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
2982 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
2983 | plist = XCONS (XCONS (plist)->cdr)->cdr) | |
2984 | { | |
2985 | if (EQ (XCONS (plist)->car, prop)) | |
2986 | return XCONS (XCONS (plist)->cdr)->car; | |
cab4777e RS |
2987 | else if (EQ (XCONS (plist)->car, Qcategory)) |
2988 | { | |
2989 | Lisp_Object tem; | |
2990 | tem = Fcar (Fcdr (plist)); | |
2991 | if (SYMBOLP (tem)) | |
2992 | fallback = Fget (tem, prop); | |
2993 | } | |
2eec3b4e | 2994 | } |
52f8ec73 | 2995 | |
cab4777e | 2996 | return fallback; |
2eec3b4e RS |
2997 | } |
2998 | ||
2999 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3000 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3001 | (overlay, prop, value) | |
3002 | Lisp_Object overlay, prop, value; | |
3003 | { | |
48e2e3ba | 3004 | Lisp_Object tail, buffer; |
9d7608b7 | 3005 | int changed; |
2eec3b4e | 3006 | |
52f8ec73 | 3007 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3008 | |
274a9425 RS |
3009 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3010 | ||
48e2e3ba | 3011 | for (tail = XOVERLAY (overlay)->plist; |
2eec3b4e RS |
3012 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
3013 | tail = XCONS (XCONS (tail)->cdr)->cdr) | |
274a9425 RS |
3014 | if (EQ (XCONS (tail)->car, prop)) |
3015 | { | |
9d7608b7 KH |
3016 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
3017 | XCONS (XCONS (tail)->cdr)->car = value; | |
3018 | goto found; | |
274a9425 | 3019 | } |
9d7608b7 KH |
3020 | /* It wasn't in the list, so add it to the front. */ |
3021 | changed = !NILP (value); | |
48e2e3ba KH |
3022 | XOVERLAY (overlay)->plist |
3023 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3024 | found: |
3025 | if (! NILP (buffer)) | |
3026 | { | |
3027 | if (changed) | |
3028 | redisplay_region (XBUFFER (buffer), | |
3029 | marker_position (OVERLAY_START (overlay)), | |
3030 | marker_position (OVERLAY_END (overlay))); | |
3031 | if (EQ (prop, Qevaporate) && ! NILP (value) | |
3032 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3033 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3034 | Fdelete_overlay (overlay); | |
3035 | } | |
2eec3b4e | 3036 | return value; |
1ab256cb RM |
3037 | } |
3038 | \f | |
9115729e KH |
3039 | /* Subroutine of report_overlay_modification. */ |
3040 | ||
3041 | /* Lisp vector holding overlay hook functions to call. | |
3042 | Vector elements come in pairs. | |
3043 | Each even-index element is a list of hook functions. | |
3044 | The following odd-index element is the overlay they came from. | |
3045 | ||
3046 | Before the buffer change, we fill in this vector | |
3047 | as we call overlay hook functions. | |
3048 | After the buffer change, we get the functions to call from this vector. | |
3049 | This way we always call the same functions before and after the change. */ | |
3050 | static Lisp_Object last_overlay_modification_hooks; | |
3051 | ||
3052 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3053 | static int last_overlay_modification_hooks_used; | |
3054 | ||
3055 | /* Add one functionlist/overlay pair | |
3056 | to the end of last_overlay_modification_hooks. */ | |
3057 | ||
3058 | static void | |
3059 | add_overlay_mod_hooklist (functionlist, overlay) | |
3060 | Lisp_Object functionlist, overlay; | |
3061 | { | |
3062 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3063 | ||
3064 | if (last_overlay_modification_hooks_used == oldsize) | |
3065 | { | |
3066 | Lisp_Object old; | |
3067 | old = last_overlay_modification_hooks; | |
3068 | last_overlay_modification_hooks | |
3069 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3070 | bcopy (XVECTOR (old)->contents, |
3071 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3072 | sizeof (Lisp_Object) * oldsize); |
3073 | } | |
3074 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3075 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3076 | } | |
3077 | \f | |
173f2a64 RS |
3078 | /* Run the modification-hooks of overlays that include |
3079 | any part of the text in START to END. | |
9115729e KH |
3080 | If this change is an insertion, also |
3081 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3082 | and the insert-after-hooks of overlay ending at START. |
3083 | ||
3084 | This is called both before and after the modification. | |
3085 | AFTER is nonzero when we call after the modification. | |
3086 | ||
9115729e KH |
3087 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3088 | When AFTER is nonzero, they are the start position, | |
3089 | the position after the inserted new text, | |
3090 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3091 | |
3092 | void | |
930a9140 | 3093 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3094 | Lisp_Object start, end; |
930a9140 RS |
3095 | int after; |
3096 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3097 | { |
3098 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3099 | /* 1 if this change is an insertion. */ |
3100 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3101 | int tail_copied; |
930a9140 | 3102 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3103 | |
3104 | overlay = Qnil; | |
3105 | tail = Qnil; | |
930a9140 | 3106 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3107 | |
9115729e KH |
3108 | if (after) |
3109 | { | |
3110 | /* Call the functions recorded in last_overlay_modification_hooks | |
3111 | rather than scanning the overlays again. | |
3112 | First copy the vector contents, in case some of these hooks | |
3113 | do subsequent modification of the buffer. */ | |
3114 | int size = last_overlay_modification_hooks_used; | |
3115 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3116 | int i; | |
3117 | ||
3118 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3119 | copy, size * sizeof (Lisp_Object)); | |
3120 | gcpro1.var = copy; | |
3121 | gcpro1.nvars = size; | |
3122 | ||
3123 | for (i = 0; i < size;) | |
3124 | { | |
3125 | Lisp_Object prop, overlay; | |
3126 | prop = copy[i++]; | |
3127 | overlay = copy[i++]; | |
3128 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3129 | } | |
3130 | UNGCPRO; | |
3131 | return; | |
3132 | } | |
3133 | ||
3134 | /* We are being called before a change. | |
3135 | Scan the overlays to find the functions to call. */ | |
3136 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3137 | tail_copied = 0; |
173f2a64 RS |
3138 | for (tail = current_buffer->overlays_before; |
3139 | CONSP (tail); | |
3140 | tail = XCONS (tail)->cdr) | |
3141 | { | |
3142 | int startpos, endpos; | |
be8b1c6b | 3143 | Lisp_Object ostart, oend; |
173f2a64 RS |
3144 | |
3145 | overlay = XCONS (tail)->car; | |
3146 | ||
3147 | ostart = OVERLAY_START (overlay); | |
3148 | oend = OVERLAY_END (overlay); | |
3149 | endpos = OVERLAY_POSITION (oend); | |
3150 | if (XFASTINT (start) > endpos) | |
3151 | break; | |
3152 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3153 | if (insertion && (XFASTINT (start) == startpos |
3154 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3155 | { |
3156 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3157 | if (!NILP (prop)) |
3158 | { | |
3159 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3160 | if (!tail_copied) |
3161 | tail = Fcopy_sequence (tail); | |
3162 | tail_copied = 1; | |
930a9140 | 3163 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3164 | } |
173f2a64 | 3165 | } |
9115729e KH |
3166 | if (insertion && (XFASTINT (start) == endpos |
3167 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3168 | { |
3169 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3170 | if (!NILP (prop)) |
3171 | { | |
55b48893 RS |
3172 | if (!tail_copied) |
3173 | tail = Fcopy_sequence (tail); | |
3174 | tail_copied = 1; | |
930a9140 | 3175 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3176 | } |
173f2a64 | 3177 | } |
3bd13e92 KH |
3178 | /* Test for intersecting intervals. This does the right thing |
3179 | for both insertion and deletion. */ | |
3180 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3181 | { |
3182 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3183 | if (!NILP (prop)) |
3184 | { | |
55b48893 RS |
3185 | if (!tail_copied) |
3186 | tail = Fcopy_sequence (tail); | |
3187 | tail_copied = 1; | |
930a9140 | 3188 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3189 | } |
173f2a64 RS |
3190 | } |
3191 | } | |
3192 | ||
55b48893 | 3193 | tail_copied = 0; |
173f2a64 RS |
3194 | for (tail = current_buffer->overlays_after; |
3195 | CONSP (tail); | |
3196 | tail = XCONS (tail)->cdr) | |
3197 | { | |
3198 | int startpos, endpos; | |
be8b1c6b | 3199 | Lisp_Object ostart, oend; |
173f2a64 RS |
3200 | |
3201 | overlay = XCONS (tail)->car; | |
3202 | ||
3203 | ostart = OVERLAY_START (overlay); | |
3204 | oend = OVERLAY_END (overlay); | |
3205 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 3206 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
3207 | if (XFASTINT (end) < startpos) |
3208 | break; | |
9115729e KH |
3209 | if (insertion && (XFASTINT (start) == startpos |
3210 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3211 | { |
3212 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3213 | if (!NILP (prop)) |
3214 | { | |
55b48893 RS |
3215 | if (!tail_copied) |
3216 | tail = Fcopy_sequence (tail); | |
3217 | tail_copied = 1; | |
930a9140 | 3218 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3219 | } |
173f2a64 | 3220 | } |
9115729e KH |
3221 | if (insertion && (XFASTINT (start) == endpos |
3222 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3223 | { |
3224 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3225 | if (!NILP (prop)) |
3226 | { | |
55b48893 RS |
3227 | if (!tail_copied) |
3228 | tail = Fcopy_sequence (tail); | |
3229 | tail_copied = 1; | |
930a9140 | 3230 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3231 | } |
173f2a64 | 3232 | } |
3bd13e92 KH |
3233 | /* Test for intersecting intervals. This does the right thing |
3234 | for both insertion and deletion. */ | |
3235 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3236 | { |
3237 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3238 | if (!NILP (prop)) |
3239 | { | |
55b48893 RS |
3240 | if (!tail_copied) |
3241 | tail = Fcopy_sequence (tail); | |
3242 | tail_copied = 1; | |
930a9140 | 3243 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3244 | } |
173f2a64 RS |
3245 | } |
3246 | } | |
55b48893 RS |
3247 | |
3248 | UNGCPRO; | |
173f2a64 RS |
3249 | } |
3250 | ||
3251 | static void | |
930a9140 RS |
3252 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
3253 | Lisp_Object list, overlay; | |
3254 | int after; | |
3255 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 3256 | { |
930a9140 | 3257 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 3258 | |
930a9140 | 3259 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
3260 | if (! after) |
3261 | add_overlay_mod_hooklist (list, overlay); | |
3262 | ||
173f2a64 RS |
3263 | while (!NILP (list)) |
3264 | { | |
930a9140 RS |
3265 | if (NILP (arg3)) |
3266 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
3267 | else | |
3268 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
3269 | list = Fcdr (list); |
3270 | } | |
3271 | UNGCPRO; | |
3272 | } | |
9d7608b7 KH |
3273 | |
3274 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
3275 | property is set. */ | |
3276 | void | |
3277 | evaporate_overlays (pos) | |
3278 | int pos; | |
3279 | { | |
3280 | Lisp_Object tail, overlay, hit_list; | |
3281 | ||
3282 | hit_list = Qnil; | |
3283 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
3284 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
3285 | tail = XCONS (tail)->cdr) | |
3286 | { | |
3287 | int endpos; | |
3288 | overlay = XCONS (tail)->car; | |
3289 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3290 | if (endpos < pos) | |
3291 | break; | |
3292 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 3293 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3294 | hit_list = Fcons (overlay, hit_list); |
3295 | } | |
3296 | else | |
3297 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
3298 | tail = XCONS (tail)->cdr) | |
3299 | { | |
3300 | int startpos; | |
889bf329 | 3301 | overlay = XCONS (tail)->car; |
9d7608b7 KH |
3302 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3303 | if (startpos > pos) | |
3304 | break; | |
3305 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 3306 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
3307 | hit_list = Fcons (overlay, hit_list); |
3308 | } | |
3309 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) | |
3310 | Fdelete_overlay (XCONS (hit_list)->car); | |
3311 | } | |
173f2a64 | 3312 | \f |
54dfdeb0 KH |
3313 | /* Somebody has tried to store a value with an unacceptable type |
3314 | into the buffer-local slot with offset OFFSET. */ | |
0fa3ba92 | 3315 | void |
54dfdeb0 KH |
3316 | buffer_slot_type_mismatch (offset) |
3317 | int offset; | |
0fa3ba92 | 3318 | { |
54dfdeb0 | 3319 | Lisp_Object sym; |
0fa3ba92 | 3320 | char *type_name; |
54dfdeb0 | 3321 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
0fa3ba92 JB |
3322 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
3323 | { | |
3324 | case Lisp_Int: type_name = "integers"; break; | |
3325 | case Lisp_String: type_name = "strings"; break; | |
0fa3ba92 | 3326 | case Lisp_Symbol: type_name = "symbols"; break; |
0fa3ba92 JB |
3327 | default: |
3328 | abort (); | |
3329 | } | |
3330 | ||
3331 | error ("only %s should be stored in the buffer-local variable %s", | |
54dfdeb0 | 3332 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 JB |
3333 | } |
3334 | \f | |
1ab256cb RM |
3335 | init_buffer_once () |
3336 | { | |
3337 | register Lisp_Object tem; | |
3338 | ||
13de9290 RS |
3339 | buffer_permanent_local_flags = 0; |
3340 | ||
1ab256cb RM |
3341 | /* Make sure all markable slots in buffer_defaults |
3342 | are initialized reasonably, so mark_buffer won't choke. */ | |
3343 | reset_buffer (&buffer_defaults); | |
13de9290 | 3344 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 3345 | reset_buffer (&buffer_local_symbols); |
13de9290 | 3346 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
3347 | /* Prevent GC from getting confused. */ |
3348 | buffer_defaults.text = &buffer_defaults.own_text; | |
3349 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
3350 | #ifdef USE_TEXT_PROPERTIES | |
3351 | BUF_INTERVALS (&buffer_defaults) = 0; | |
3352 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3353 | #endif | |
67180c6a KH |
3354 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3355 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
3356 | |
3357 | /* Set up the default values of various buffer slots. */ | |
3358 | /* Must do these before making the first buffer! */ | |
3359 | ||
3360 | /* real setup is done in loaddefs.el */ | |
3361 | buffer_defaults.mode_line_format = build_string ("%-"); | |
3362 | buffer_defaults.abbrev_mode = Qnil; | |
3363 | buffer_defaults.overwrite_mode = Qnil; | |
3364 | buffer_defaults.case_fold_search = Qt; | |
3365 | buffer_defaults.auto_fill_function = Qnil; | |
3366 | buffer_defaults.selective_display = Qnil; | |
3367 | #ifndef old | |
3368 | buffer_defaults.selective_display_ellipses = Qt; | |
3369 | #endif | |
3370 | buffer_defaults.abbrev_table = Qnil; | |
3371 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 3372 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 3373 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 3374 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
3375 | buffer_defaults.overlays_before = Qnil; |
3376 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 3377 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 3378 | |
8d7a4592 | 3379 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
3380 | buffer_defaults.truncate_lines = Qnil; |
3381 | buffer_defaults.ctl_arrow = Qt; | |
3382 | ||
f7975d07 | 3383 | #ifdef DOS_NT |
0776cb1b | 3384 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 3385 | #endif |
8d7a4592 KH |
3386 | XSETFASTINT (buffer_defaults.fill_column, 70); |
3387 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 3388 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 3389 | buffer_defaults.file_truename = Qnil; |
1ab256cb RM |
3390 | |
3391 | /* Assign the local-flags to the slots that have default values. | |
3392 | The local flag is a bit that is used in the buffer | |
3393 | to say that it has its own local value for the slot. | |
3394 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
3395 | ||
3396 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 3397 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
3398 | |
3399 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
3400 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
3401 | XSETINT (buffer_local_flags.filename, -1); |
3402 | XSETINT (buffer_local_flags.directory, -1); | |
3403 | XSETINT (buffer_local_flags.backed_up, -1); | |
3404 | XSETINT (buffer_local_flags.save_length, -1); | |
3405 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
3406 | XSETINT (buffer_local_flags.read_only, -1); | |
3407 | XSETINT (buffer_local_flags.major_mode, -1); | |
3408 | XSETINT (buffer_local_flags.mode_name, -1); | |
3409 | XSETINT (buffer_local_flags.undo_list, -1); | |
3410 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 3411 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 3412 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 3413 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 3414 | XSETINT (buffer_local_flags.file_format, -1); |
8d7a4592 KH |
3415 | |
3416 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); | |
3417 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); | |
3418 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); | |
3419 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); | |
3420 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); | |
3421 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); | |
1ab256cb | 3422 | #ifndef old |
8d7a4592 | 3423 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
1ab256cb | 3424 | #endif |
8d7a4592 KH |
3425 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
3426 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); | |
3427 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); | |
3428 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); | |
3429 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); | |
3430 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); | |
3431 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); | |
f7975d07 | 3432 | #ifdef DOS_NT |
8d7a4592 | 3433 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
13de9290 RS |
3434 | /* Make this one a permanent local. */ |
3435 | buffer_permanent_local_flags |= 0x4000; | |
54ad07d3 | 3436 | #endif |
2e716096 RS |
3437 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
3438 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); | |
13de9290 | 3439 | |
1ab256cb RM |
3440 | Vbuffer_alist = Qnil; |
3441 | current_buffer = 0; | |
3442 | all_buffers = 0; | |
3443 | ||
3444 | QSFundamental = build_string ("Fundamental"); | |
3445 | ||
3446 | Qfundamental_mode = intern ("fundamental-mode"); | |
3447 | buffer_defaults.major_mode = Qfundamental_mode; | |
3448 | ||
3449 | Qmode_class = intern ("mode-class"); | |
3450 | ||
3451 | Qprotected_field = intern ("protected-field"); | |
3452 | ||
3453 | Qpermanent_local = intern ("permanent-local"); | |
3454 | ||
3455 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
3456 | ||
3457 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 3458 | |
1ab256cb RM |
3459 | /* super-magic invisible buffer */ |
3460 | Vbuffer_alist = Qnil; | |
3461 | ||
ffd56f97 | 3462 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
1ab256cb RM |
3463 | } |
3464 | ||
3465 | init_buffer () | |
3466 | { | |
3467 | char buf[MAXPATHLEN+1]; | |
2381d133 JB |
3468 | char *pwd; |
3469 | struct stat dotstat, pwdstat; | |
136351b7 | 3470 | Lisp_Object temp; |
f7975d07 | 3471 | int rc; |
1ab256cb RM |
3472 | |
3473 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); | |
2381d133 JB |
3474 | |
3475 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
3476 | when PWD is right, and may avoid a fatal error. */ | |
f7975d07 | 3477 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
2381d133 JB |
3478 | && stat (pwd, &pwdstat) == 0 |
3479 | && stat (".", &dotstat) == 0 | |
3480 | && dotstat.st_ino == pwdstat.st_ino | |
3481 | && dotstat.st_dev == pwdstat.st_dev | |
3482 | && strlen (pwd) < MAXPATHLEN) | |
3483 | strcpy (buf, pwd); | |
3484 | else if (getwd (buf) == 0) | |
cf1e6391 | 3485 | fatal ("`getwd' failed: %s\n", buf); |
1ab256cb RM |
3486 | |
3487 | #ifndef VMS | |
3488 | /* Maybe this should really use some standard subroutine | |
3489 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
3490 | rc = strlen (buf); |
3491 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
3492 | { | |
3493 | buf[rc] = DIRECTORY_SEP; | |
3494 | buf[rc + 1] = '\0'; | |
3495 | } | |
1ab256cb RM |
3496 | #endif /* not VMS */ |
3497 | current_buffer->directory = build_string (buf); | |
136351b7 RS |
3498 | |
3499 | temp = get_minibuffer (0); | |
3500 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
3501 | } |
3502 | ||
3503 | /* initialize the buffer routines */ | |
3504 | syms_of_buffer () | |
3505 | { | |
188d4d11 RM |
3506 | extern Lisp_Object Qdisabled; |
3507 | ||
9115729e KH |
3508 | staticpro (&last_overlay_modification_hooks); |
3509 | last_overlay_modification_hooks | |
3510 | = Fmake_vector (make_number (10), Qnil); | |
3511 | ||
1ab256cb RM |
3512 | staticpro (&Vbuffer_defaults); |
3513 | staticpro (&Vbuffer_local_symbols); | |
3514 | staticpro (&Qfundamental_mode); | |
3515 | staticpro (&Qmode_class); | |
3516 | staticpro (&QSFundamental); | |
3517 | staticpro (&Vbuffer_alist); | |
3518 | staticpro (&Qprotected_field); | |
3519 | staticpro (&Qpermanent_local); | |
3520 | staticpro (&Qkill_buffer_hook); | |
22378665 | 3521 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 3522 | staticpro (&Qoverlayp); |
9d7608b7 KH |
3523 | Qevaporate = intern ("evaporate"); |
3524 | staticpro (&Qevaporate); | |
294d215f | 3525 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 3526 | staticpro (&Qmodification_hooks); |
294d215f | 3527 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 3528 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 3529 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 3530 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 3531 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 3532 | staticpro (&Qget_file_buffer); |
5985d248 KH |
3533 | Qpriority = intern ("priority"); |
3534 | staticpro (&Qpriority); | |
3535 | Qwindow = intern ("window"); | |
3536 | staticpro (&Qwindow); | |
bbbe9545 KH |
3537 | Qbefore_string = intern ("before-string"); |
3538 | staticpro (&Qbefore_string); | |
3539 | Qafter_string = intern ("after-string"); | |
3540 | staticpro (&Qafter_string); | |
22378665 RS |
3541 | Qfirst_change_hook = intern ("first-change-hook"); |
3542 | staticpro (&Qfirst_change_hook); | |
3543 | Qbefore_change_functions = intern ("before-change-functions"); | |
3544 | staticpro (&Qbefore_change_functions); | |
3545 | Qafter_change_functions = intern ("after-change-functions"); | |
3546 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
3547 | |
3548 | Fput (Qprotected_field, Qerror_conditions, | |
3549 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
3550 | Fput (Qprotected_field, Qerror_message, | |
3551 | build_string ("Attempt to modify a protected field")); | |
3552 | ||
3553 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
3554 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
3555 | ||
3556 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
3557 | &buffer_defaults.mode_line_format, | |
3558 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
3559 | This is the same as (default-value 'mode-line-format)."); | |
3560 | ||
3561 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", | |
3562 | &buffer_defaults.abbrev_mode, | |
3563 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
3564 | This is the same as (default-value 'abbrev-mode)."); | |
3565 | ||
3566 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
3567 | &buffer_defaults.ctl_arrow, | |
3568 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
3569 | This is the same as (default-value 'ctl-arrow)."); | |
3570 | ||
3571 | DEFVAR_LISP_NOPRO ("default-truncate-lines", | |
3572 | &buffer_defaults.truncate_lines, | |
3573 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
3574 | This is the same as (default-value 'truncate-lines)."); | |
3575 | ||
3576 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
3577 | &buffer_defaults.fill_column, | |
3578 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
3579 | This is the same as (default-value 'fill-column)."); | |
3580 | ||
3581 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
3582 | &buffer_defaults.left_margin, | |
3583 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
3584 | This is the same as (default-value 'left-margin)."); | |
3585 | ||
3586 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
3587 | &buffer_defaults.tab_width, | |
3588 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
3589 | This is the same as (default-value 'tab-width)."); | |
3590 | ||
3591 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
3592 | &buffer_defaults.case_fold_search, | |
3593 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
3594 | This is the same as (default-value 'case-fold-search)."); | |
3595 | ||
f7975d07 | 3596 | #ifdef DOS_NT |
54ad07d3 RS |
3597 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
3598 | &buffer_defaults.buffer_file_type, | |
3599 | "Default file type for buffers that do not override it.\n\ | |
3600 | This is the same as (default-value 'buffer-file-type).\n\ | |
3601 | The file type is nil for text, t for binary."); | |
3602 | #endif | |
3603 | ||
0fa3ba92 JB |
3604 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
3605 | Qnil, 0); | |
1ab256cb RM |
3606 | |
3607 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
3608 | But make-docfile finds it! | |
3609 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 3610 | Qnil, |
1ab256cb RM |
3611 | "Template for displaying mode line for current buffer.\n\ |
3612 | Each buffer has its own value of this variable.\n\ | |
3613 | Value may be a string, a symbol or a list or cons cell.\n\ | |
3614 | For a symbol, its value is used (but it is ignored if t or nil).\n\ | |
3615 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
3616 | in that the %-constructs below are not recognized.\n\ | |
3617 | For a list whose car is a symbol, the symbol's value is taken,\n\ | |
3618 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
3619 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
3620 | For a list whose car is a string or list, each element is processed\n\ | |
3621 | recursively and the results are effectively concatenated.\n\ | |
3622 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
3623 | and padded (if the number is positive) or truncated (if negative)\n\ | |
3624 | to the width specified by that number.\n\ | |
3625 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
3626 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
3627 | or when it is found in a cons-cell or a list)\n\ | |
3628 | %b -- print buffer name. %f -- print visited file name.\n\ | |
c2ff34f7 RS |
3629 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
3630 | % means buffer is read-only and * means it is modified.\n\ | |
3631 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 3632 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 3633 | %c -- print the current column number (this makes editing slower).\n\ |
dd24e6a6 | 3634 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 3635 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 3636 | or print Bottom or All.\n\ |
1ab256cb | 3637 | %n -- print Narrow if appropriate.\n\ |
54ad07d3 | 3638 | %t -- print T if files is text, B if binary.\n\ |
1ab256cb RM |
3639 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
3640 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
3641 | Decimal digits after the % specify field width to which to pad."); | |
3642 | */ | |
3643 | ||
3644 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
3645 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
3646 | nil here means use current buffer's major mode."); | |
3647 | ||
3648 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 3649 | make_number (Lisp_Symbol), |
1ab256cb RM |
3650 | "Symbol for current buffer's major mode."); |
3651 | ||
3652 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 3653 | make_number (Lisp_String), |
1ab256cb RM |
3654 | "Pretty name of current buffer's major mode (a string)."); |
3655 | ||
0fa3ba92 | 3656 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
3657 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
3658 | Automatically becomes buffer-local when set in any fashion."); | |
3659 | ||
3660 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 3661 | Qnil, |
1ab256cb RM |
3662 | "*Non-nil if searches should ignore case.\n\ |
3663 | Automatically becomes buffer-local when set in any fashion."); | |
3664 | ||
3665 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 3666 | make_number (Lisp_Int), |
1ab256cb RM |
3667 | "*Column beyond which automatic line-wrapping should happen.\n\ |
3668 | Automatically becomes buffer-local when set in any fashion."); | |
3669 | ||
3670 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 3671 | make_number (Lisp_Int), |
1ab256cb RM |
3672 | "*Column for the default indent-line-function to indent to.\n\ |
3673 | Linefeed indents to this column in Fundamental mode.\n\ | |
3674 | Automatically becomes buffer-local when set in any fashion."); | |
3675 | ||
3676 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 3677 | make_number (Lisp_Int), |
1ab256cb RM |
3678 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
3679 | Automatically becomes buffer-local when set in any fashion."); | |
3680 | ||
0fa3ba92 | 3681 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb RM |
3682 | "*Non-nil means display control chars with uparrow.\n\ |
3683 | Nil means use backslash and octal digits.\n\ | |
3684 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3685 | This variable does not apply to characters whose display is specified\n\ | |
3686 | in the current display table (if there is one)."); | |
3687 | ||
0fa3ba92 | 3688 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
3689 | "*Non-nil means do not display continuation lines;\n\ |
3690 | give each line of text one screen line.\n\ | |
3691 | Automatically becomes buffer-local when set in any fashion.\n\ | |
3692 | \n\ | |
3693 | Note that this is overridden by the variable\n\ | |
3694 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 3695 | and this buffer is not full-frame width."); |
1ab256cb | 3696 | |
f7975d07 | 3697 | #ifdef DOS_NT |
54ad07d3 RS |
3698 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
3699 | Qnil, | |
006d3d34 RS |
3700 | "Non-nil if the visited file is a binary file.\n\ |
3701 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
3702 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 3703 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
3704 | #endif |
3705 | ||
1ab256cb | 3706 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 3707 | make_number (Lisp_String), |
1ab256cb RM |
3708 | "Name of default directory of current buffer. Should end with slash.\n\ |
3709 | Each buffer has its own value of this variable."); | |
3710 | ||
3711 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 3712 | Qnil, |
1ab256cb | 3713 | "Function called (if non-nil) to perform auto-fill.\n\ |
54158e68 | 3714 | It is called after self-inserting a space or newline.\n\ |
1ab256cb | 3715 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
3716 | NOTE: This variable is not a hook;\n\ |
3717 | its value may not be a list of functions."); | |
1ab256cb RM |
3718 | |
3719 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 3720 | make_number (Lisp_String), |
1ab256cb RM |
3721 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
3722 | Each buffer has its own value of this variable."); | |
3723 | ||
f6ed2e84 RS |
3724 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
3725 | make_number (Lisp_String), | |
bb4c204e | 3726 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
3727 | The truename of a file is calculated by `file-truename'\n\ |
3728 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
3729 | Each buffer has its own value of this variable."); |
3730 | ||
1ab256cb | 3731 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 3732 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 3733 | make_number (Lisp_String), |
1ab256cb RM |
3734 | "Name of file for auto-saving current buffer,\n\ |
3735 | or nil if buffer should not be auto-saved.\n\ | |
3736 | Each buffer has its own value of this variable."); | |
3737 | ||
0fa3ba92 | 3738 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
3739 | "Non-nil if this buffer is read-only.\n\ |
3740 | Each buffer has its own value of this variable."); | |
3741 | ||
0fa3ba92 | 3742 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
3743 | "Non-nil if this buffer's file has been backed up.\n\ |
3744 | Backing up is done before the first time the file is saved.\n\ | |
3745 | Each buffer has its own value of this variable."); | |
3746 | ||
3747 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 3748 | make_number (Lisp_Int), |
1ab256cb RM |
3749 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
3750 | 0 initially.\n\ | |
3751 | Each buffer has its own value of this variable."); | |
3752 | ||
3753 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 3754 | Qnil, |
1ab256cb RM |
3755 | "Non-nil enables selective display:\n\ |
3756 | Integer N as value means display only lines\n\ | |
3757 | that start with less than n columns of space.\n\ | |
3758 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
3759 | Then ^M's in the file are written into files as newlines.\n\n\ | |
3760 | Automatically becomes buffer-local when set in any fashion."); | |
3761 | ||
3762 | #ifndef old | |
3763 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
3764 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 3765 | Qnil, |
1ab256cb RM |
3766 | "t means display ... on previous line when a line is invisible.\n\ |
3767 | Automatically becomes buffer-local when set in any fashion."); | |
3768 | #endif | |
3769 | ||
0fa3ba92 | 3770 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 3771 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
3772 | The value should be one of `overwrite-mode-textual',\n\ |
3773 | `overwrite-mode-binary', or nil.\n\ | |
3774 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 3775 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 3776 | until the tab is filled in.\n\ |
6bbb0d4a | 3777 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
3778 | Automatically becomes buffer-local when set in any fashion."); |
3779 | ||
54939090 RS |
3780 | #if 0 /* The doc string is too long for some compilers, |
3781 | but make-docfile can find it in this comment. */ | |
1ab256cb | 3782 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 3783 | Qnil, |
1ab256cb RM |
3784 | "Display table that controls display of the contents of current buffer.\n\ |
3785 | Automatically becomes buffer-local when set in any fashion.\n\ | |
6fdc249f EN |
3786 | The display table is a char-table created with `make-display-table'.\n\ |
3787 | The ordinary char-table elements control how to display each possible text\n\ | |
3788 | character. Each value should be a vector of characters or nil;\n\ | |
1ab256cb | 3789 | nil means display the character in the default fashion.\n\ |
6fdc249f EN |
3790 | There are six extra slots to control the display of\n\ |
3791 | the end of a truncated screen line (extra-slot 0, a single character);\n\ | |
3792 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 3793 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
3794 | (extra-slot 2, a single character);\n\ |
3795 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 3796 | a single character);\n\ |
6fdc249f | 3797 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
3798 | a vector of characters);\n\ |
3799 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f EN |
3800 | (extra-slot 5, a single character).\n\ |
3801 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ | |
1ab256cb RM |
3802 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
3803 | Each window can have its own, overriding display table."); | |
54939090 RS |
3804 | #endif |
3805 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 3806 | Qnil, 0); |
1ab256cb | 3807 | |
1ab256cb RM |
3808 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
3809 | "Don't ask."); | |
3810 | */ | |
01050cb5 | 3811 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
1ab256cb RM |
3812 | "Function to call before each text change.\n\ |
3813 | Two arguments are passed to the function: the positions of\n\ | |
3814 | the beginning and end of the range of old text to be changed.\n\ | |
3815 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3816 | No information is given about the length of the text after the change.\n\ | |
1ab256cb | 3817 | \n\ |
5f079267 | 3818 | Buffer changes made while executing the `before-change-function'\n\ |
b86344d0 RS |
3819 | don't call any before-change or after-change functions.\n\ |
3820 | That's because these variables are temporarily set to nil.\n\ | |
3821 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3822 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3823 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3824 | Vbefore_change_function = Qnil; |
3825 | ||
3826 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, | |
3827 | "Function to call after each text change.\n\ | |
3828 | Three arguments are passed to the function: the positions of\n\ | |
3829 | the beginning and end of the range of changed text,\n\ | |
3830 | and the length of the pre-change text replaced by that range.\n\ | |
3831 | \(For an insertion, the pre-change length is zero;\n\ | |
3832 | for a deletion, that length is the number of characters deleted,\n\ | |
3833 | and the post-change beginning and end are at the same place.)\n\ | |
3834 | \n\ | |
5f079267 | 3835 | Buffer changes made while executing the `after-change-function'\n\ |
b86344d0 RS |
3836 | don't call any before-change or after-change functions.\n\ |
3837 | That's because these variables are temporarily set to nil.\n\ | |
3838 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3839 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3840 | accomplishing an equivalent result by using other variables."); |
1ab256cb RM |
3841 | Vafter_change_function = Qnil; |
3842 | ||
5f079267 RS |
3843 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
3844 | "List of functions to call before each text change.\n\ | |
3845 | Two arguments are passed to each function: the positions of\n\ | |
3846 | the beginning and end of the range of old text to be changed.\n\ | |
3847 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
3848 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
3849 | \n\ |
3850 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
3851 | don't call any before-change or after-change functions.\n\ |
3852 | That's because these variables are temporarily set to nil.\n\ | |
3853 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
3854 | these variables. See the Emacs Lisp manual for a way of\n\ | |
d59698c4 | 3855 | accomplishing an equivalent result by using other variables."); |
5f079267 RS |
3856 | Vbefore_change_functions = Qnil; |
3857 | ||
3858 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
3859 | "List of function to call after each text change.\n\ | |
3860 | Three arguments are passed to each function: the positions of\n\ | |
3861 | the beginning and end of the range of changed text,\n\ | |
3862 | and the length of the pre-change text replaced by that range.\n\ | |
3863 | \(For an insertion, the pre-change length is zero;\n\ | |
3864 | for a deletion, that length is the number of characters deleted,\n\ | |
3865 | and the post-change beginning and end are at the same place.)\n\ | |
3866 | \n\ | |
3867 | Buffer changes made while executing the `after-change-functions'\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\ | |
d59698c4 | 3872 | accomplishing an equivalent result by using other variables."); |
b86344d0 | 3873 | |
5f079267 RS |
3874 | Vafter_change_functions = Qnil; |
3875 | ||
dbc4e1c1 JB |
3876 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
3877 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
3878 | The functions are run using the `run-hooks' function."); | |
3879 | Vfirst_change_hook = Qnil; | |
1ab256cb | 3880 | |
54939090 RS |
3881 | #if 0 /* The doc string is too long for some compilers, |
3882 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 3883 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb RM |
3884 | "List of undo entries in current buffer.\n\ |
3885 | Recent changes come first; older changes follow newer.\n\ | |
3886 | \n\ | |
630f4018 KH |
3887 | An entry (BEG . END) represents an insertion which begins at\n\ |
3888 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
3889 | \n\ |
3890 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
3891 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
3892 | of the text being deleted; if negative, point was at the end.\n\ | |
3893 | \n\ | |
6c0df54a RS |
3894 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
3895 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
3896 | of the visited file's modification time, as of that time. If the\n\ | |
3897 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
3898 | obsolete.\n\ |
3899 | \n\ | |
6c0df54a RS |
3900 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
3901 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
3902 | and VALUE is the old value.\n\ | |
483c1fd3 | 3903 | \n\ |
da1c183c RS |
3904 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
3905 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
3906 | \n\ | |
bec44fd6 JB |
3907 | An entry of the form POSITION indicates that point was at the buffer\n\ |
3908 | location given by the integer. Undoing an entry of this form places\n\ | |
3909 | point at POSITION.\n\ | |
3910 | \n\ | |
1ab256cb RM |
3911 | nil marks undo boundaries. The undo command treats the changes\n\ |
3912 | between two undo boundaries as a single step to be undone.\n\ | |
3913 | \n\ | |
bec44fd6 | 3914 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
3915 | #endif |
3916 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 3917 | 0); |
1ab256cb | 3918 | |
c48f61ef RS |
3919 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
3920 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
3921 | Automatically local in all buffers."); | |
3922 | ||
28e969dd | 3923 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
3924 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
3925 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 3926 | \n\ |
f0c5b712 JB |
3927 | Normally, the line-motion functions work by scanning the buffer for\n\ |
3928 | newlines. Columnar operations (like move-to-column and\n\ | |
3929 | compute-motion) also work by scanning the buffer, summing character\n\ | |
3930 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 3931 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
3932 | motion functions will take longer to execute. Emacs may also take\n\ |
3933 | longer to update the display.\n\ | |
28e969dd | 3934 | \n\ |
f0c5b712 JB |
3935 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
3936 | results of their scans, and consult the cache to avoid rescanning\n\ | |
3937 | regions of the buffer until the text is modified. The caches are most\n\ | |
3938 | beneficial when they prevent the most searching---that is, when the\n\ | |
3939 | buffer contains long lines and large regions of characters with the\n\ | |
3940 | same, fixed screen width.\n\ | |
28e969dd | 3941 | \n\ |
f0c5b712 JB |
3942 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
3943 | become slightly slower (because of the overhead of consulting the\n\ | |
3944 | cache), and the caches will use memory roughly proportional to the\n\ | |
3945 | number of newlines and characters whose screen width varies.\n\ | |
3946 | \n\ | |
3947 | The caches require no explicit maintenance; their accuracy is\n\ | |
3948 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
3949 | the cache should not affect the behavior of any of the motion\n\ | |
3950 | functions; it should only affect their performance."); | |
28e969dd | 3951 | |
943e065b RS |
3952 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3953 | "Value of point before the last series of scroll operations, or nil."); | |
3954 | ||
be9aafdd BG |
3955 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
3956 | "List of formats to use when saving this buffer.\n\ | |
3957 | Formats are defined by `format-alist'. This variable is\n\ | |
3958 | set when a file is visited. Automatically local in all buffers."); | |
3959 | ||
3cb719bd RS |
3960 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
3961 | ¤t_buffer->invisibility_spec, Qnil, | |
3962 | "Invisibility spec of this buffer.\n\ | |
3963 | The default is t, which means that text is invisible\n\ | |
3964 | if it has a non-nil `invisible' property.\n\ | |
3965 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
3966 | property is an element in that list.\n\ | |
554216ad KH |
3967 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
3968 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
3969 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
3970 | ||
c48f61ef RS |
3971 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
3972 | "*Non-nil means deactivate the mark when the buffer contents change."); | |
3973 | Vtransient_mark_mode = Qnil; | |
3974 | ||
0a4469c9 | 3975 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
3976 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
3977 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
3978 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
3979 | and disregard a `read-only' text property if the property value\n\ | |
3980 | is a member of the list."); | |
3981 | Vinhibit_read_only = Qnil; | |
3982 | ||
dcdffbf6 RS |
3983 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
3984 | "List of functions called with no args to query before killing a buffer."); | |
3985 | Vkill_buffer_query_functions = Qnil; | |
3986 | ||
0dc88e60 | 3987 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
3988 | defsubr (&Sbuffer_list); |
3989 | defsubr (&Sget_buffer); | |
3990 | defsubr (&Sget_file_buffer); | |
3991 | defsubr (&Sget_buffer_create); | |
336cd056 | 3992 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 3993 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
3994 | defsubr (&Sbuffer_name); |
3995 | /*defsubr (&Sbuffer_number);*/ | |
3996 | defsubr (&Sbuffer_file_name); | |
336cd056 | 3997 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
3998 | defsubr (&Sbuffer_local_variables); |
3999 | defsubr (&Sbuffer_modified_p); | |
4000 | defsubr (&Sset_buffer_modified_p); | |
4001 | defsubr (&Sbuffer_modified_tick); | |
4002 | defsubr (&Srename_buffer); | |
4003 | defsubr (&Sother_buffer); | |
4004 | defsubr (&Sbuffer_disable_undo); | |
4005 | defsubr (&Sbuffer_enable_undo); | |
4006 | defsubr (&Skill_buffer); | |
4007 | defsubr (&Serase_buffer); | |
a9ee7a59 | 4008 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
4009 | defsubr (&Sswitch_to_buffer); |
4010 | defsubr (&Spop_to_buffer); | |
4011 | defsubr (&Scurrent_buffer); | |
4012 | defsubr (&Sset_buffer); | |
4013 | defsubr (&Sbarf_if_buffer_read_only); | |
4014 | defsubr (&Sbury_buffer); | |
1ab256cb | 4015 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 4016 | |
52f8ec73 | 4017 | defsubr (&Soverlayp); |
2eec3b4e RS |
4018 | defsubr (&Smake_overlay); |
4019 | defsubr (&Sdelete_overlay); | |
4020 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
4021 | defsubr (&Soverlay_start); |
4022 | defsubr (&Soverlay_end); | |
4023 | defsubr (&Soverlay_buffer); | |
4024 | defsubr (&Soverlay_properties); | |
2eec3b4e | 4025 | defsubr (&Soverlays_at); |
74514898 | 4026 | defsubr (&Soverlays_in); |
2eec3b4e | 4027 | defsubr (&Snext_overlay_change); |
239c932b | 4028 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
4029 | defsubr (&Soverlay_recenter); |
4030 | defsubr (&Soverlay_lists); | |
4031 | defsubr (&Soverlay_get); | |
4032 | defsubr (&Soverlay_put); | |
1ab256cb RM |
4033 | } |
4034 | ||
4035 | keys_of_buffer () | |
4036 | { | |
4037 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
4038 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
4039 | |
4040 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
4041 | initialized when that function gets called. */ | |
4042 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 4043 | } |