Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
09a22085 | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001 |
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 | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
9dde47f5 | 29 | |
2538fae4 | 30 | #ifndef USE_CRT_DLL |
9dde47f5 | 31 | extern int errno; |
2538fae4 | 32 | #endif |
1ab256cb RM |
33 | |
34 | #ifndef MAXPATHLEN | |
35 | /* in 4.1, param.h fails to define this. */ | |
36 | #define MAXPATHLEN 1024 | |
37 | #endif /* not MAXPATHLEN */ | |
38 | ||
dfcf069d AS |
39 | #ifdef HAVE_UNISTD_H |
40 | #include <unistd.h> | |
41 | #endif | |
1ab256cb | 42 | #include "lisp.h" |
21cf4cf8 | 43 | #include "intervals.h" |
1ab256cb RM |
44 | #include "window.h" |
45 | #include "commands.h" | |
46 | #include "buffer.h" | |
3b06f880 | 47 | #include "charset.h" |
28e969dd | 48 | #include "region-cache.h" |
1ab256cb | 49 | #include "indent.h" |
d014bf88 | 50 | #include "blockinput.h" |
2538fae4 | 51 | #include "keyboard.h" |
08460cd4 | 52 | #include "frame.h" |
1ab256cb RM |
53 | |
54 | struct buffer *current_buffer; /* the current buffer */ | |
55 | ||
56 | /* First buffer in chain of all buffers (in reverse order of creation). | |
57 | Threaded through ->next. */ | |
58 | ||
59 | struct buffer *all_buffers; | |
60 | ||
61 | /* This structure holds the default values of the buffer-local variables | |
62 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
63 | The default value occupies the same slot in this structure | |
64 | as an individual buffer's value occupies in that buffer. | |
65 | Setting the default value also goes through the alist of buffers | |
66 | and stores into each buffer that does not say it has a local value. */ | |
67 | ||
68 | struct buffer buffer_defaults; | |
69 | ||
70 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
71 | ||
72 | static Lisp_Object Vbuffer_defaults; | |
73 | ||
74 | /* This structure marks which slots in a buffer have corresponding | |
75 | default values in buffer_defaults. | |
76 | Each such slot has a nonzero value in this structure. | |
77 | The value has only one nonzero bit. | |
78 | ||
79 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
80 | the entry for that slot (found in the same slot in this structure) |
81 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
82 | |
83 | If a slot in this structure is -1, then even though there may | |
84 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
85 | and the corresponding slot in buffer_defaults is not used. | |
86 | ||
87 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
88 | but there is a default value which is copied into each buffer. | |
89 | ||
90 | If a slot in this structure is negative, then even though there may | |
91 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
92 | and the corresponding slot in buffer_defaults is not used. | |
93 | ||
94 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
95 | zero, that is a bug */ | |
96 | ||
97 | struct buffer buffer_local_flags; | |
98 | ||
99 | /* This structure holds the names of symbols whose values may be | |
100 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
101 | ||
102 | struct buffer buffer_local_symbols; | |
103 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
104 | static Lisp_Object Vbuffer_local_symbols; | |
105 | ||
0fa3ba92 JB |
106 | /* This structure holds the required types for the values in the |
107 | buffer-local slots. If a slot contains Qnil, then the | |
108 | corresponding buffer slot may contain a value of any type. If a | |
109 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
110 | equal to that integer (except nil is always allowed). |
111 | When a tag does not match, the function | |
112 | buffer_slot_type_mismatch will signal an error. | |
113 | ||
114 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
115 | struct buffer buffer_local_types; |
116 | ||
13de9290 RS |
117 | /* Flags indicating which built-in buffer-local variables |
118 | are permanent locals. */ | |
7313acd0 | 119 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
120 | |
121 | /* Number of per-buffer variables used. */ | |
122 | ||
7313acd0 | 123 | int last_per_buffer_idx; |
13de9290 | 124 | |
1ab256cb | 125 | Lisp_Object Fset_buffer (); |
01050cb5 | 126 | void set_buffer_internal (); |
c7aa5005 | 127 | void set_buffer_internal_1 (); |
173f2a64 | 128 | static void call_overlay_mod_hooks (); |
2f3f993b | 129 | static void swap_out_buffer_local_variables (); |
13de9290 | 130 | static void reset_buffer_local_variables (); |
1ab256cb RM |
131 | |
132 | /* Alist of all buffer names vs the buffers. */ | |
133 | /* This used to be a variable, but is no longer, | |
134 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
135 | Lisp_Object Vbuffer_alist; | |
136 | ||
137 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
138 | Lisp_Object Vbefore_change_functions; |
139 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 140 | |
c48f61ef RS |
141 | Lisp_Object Vtransient_mark_mode; |
142 | ||
a96b68f1 RS |
143 | /* t means ignore all read-only text properties. |
144 | A list means ignore such a property if its value is a member of the list. | |
145 | Any non-nil value means ignore buffer-read-only. */ | |
146 | Lisp_Object Vinhibit_read_only; | |
147 | ||
dcdffbf6 RS |
148 | /* List of functions to call that can query about killing a buffer. |
149 | If any of these functions returns nil, we don't kill it. */ | |
150 | Lisp_Object Vkill_buffer_query_functions; | |
151 | ||
dbc4e1c1 JB |
152 | /* List of functions to call before changing an unmodified buffer. */ |
153 | Lisp_Object Vfirst_change_hook; | |
22378665 | 154 | |
dbc4e1c1 | 155 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
156 | Lisp_Object Qbefore_change_functions; |
157 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 158 | |
7775635d KH |
159 | /* If nonzero, all modification hooks are suppressed. */ |
160 | int inhibit_modification_hooks; | |
161 | ||
1ab256cb RM |
162 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
163 | ||
164 | Lisp_Object Qprotected_field; | |
165 | ||
166 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
167 | ||
168 | Lisp_Object Qkill_buffer_hook; | |
169 | ||
5fe0b67e RS |
170 | Lisp_Object Qget_file_buffer; |
171 | ||
52f8ec73 JB |
172 | Lisp_Object Qoverlayp; |
173 | ||
bbbe9545 | 174 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 175 | |
294d215f RS |
176 | Lisp_Object Qmodification_hooks; |
177 | Lisp_Object Qinsert_in_front_hooks; | |
178 | Lisp_Object Qinsert_behind_hooks; | |
179 | ||
b86af064 GM |
180 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
181 | static void free_buffer_text P_ ((struct buffer *b)); | |
04e4cb3a | 182 | static Lisp_Object copy_overlays P_ ((struct buffer *, Lisp_Object)); |
26f545d7 | 183 | static void modify_overlay P_ ((struct buffer *, int, int)); |
b86af064 GM |
184 | |
185 | ||
1ab256cb RM |
186 | /* For debugging; temporary. See set_buffer_internal. */ |
187 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
188 | ||
01136e9b | 189 | void |
1ab256cb RM |
190 | nsberror (spec) |
191 | Lisp_Object spec; | |
192 | { | |
a7a60ce9 | 193 | if (STRINGP (spec)) |
1ab256cb RM |
194 | error ("No buffer named %s", XSTRING (spec)->data); |
195 | error ("Invalid buffer argument"); | |
196 | } | |
197 | \f | |
0dc88e60 RS |
198 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
199 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ | |
200 | Value is nil if OBJECT is not a buffer or if it has been killed.") | |
201 | (object) | |
202 | Lisp_Object object; | |
203 | { | |
204 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
205 | ? Qt : Qnil); | |
206 | } | |
207 | ||
08460cd4 RS |
208 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
209 | "Return a list of all existing live buffers.\n\ | |
210 | If the optional arg FRAME is a frame, we return that frame's buffer list.") | |
211 | (frame) | |
212 | Lisp_Object frame; | |
1ab256cb | 213 | { |
08460cd4 RS |
214 | Lisp_Object framelist, general; |
215 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
216 | ||
217 | if (FRAMEP (frame)) | |
218 | { | |
219 | Lisp_Object tail; | |
220 | ||
221 | CHECK_FRAME (frame, 1); | |
222 | ||
223 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
224 | ||
225 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
226 | tail = framelist; | |
227 | while (! NILP (tail)) | |
228 | { | |
7539e11f KR |
229 | general = Fdelq (XCAR (tail), general); |
230 | tail = XCDR (tail); | |
08460cd4 RS |
231 | } |
232 | return nconc2 (framelist, general); | |
233 | } | |
234 | ||
235 | return general; | |
1ab256cb RM |
236 | } |
237 | ||
04ae1b48 RS |
238 | /* Like Fassoc, but use Fstring_equal to compare |
239 | (which ignores text properties), | |
240 | and don't ever QUIT. */ | |
241 | ||
242 | static Lisp_Object | |
243 | assoc_ignore_text_properties (key, list) | |
244 | register Lisp_Object key; | |
245 | Lisp_Object list; | |
246 | { | |
247 | register Lisp_Object tail; | |
248 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) | |
249 | { | |
250 | register Lisp_Object elt, tem; | |
251 | elt = Fcar (tail); | |
252 | tem = Fstring_equal (Fcar (elt), key); | |
253 | if (!NILP (tem)) | |
254 | return elt; | |
255 | } | |
256 | return Qnil; | |
257 | } | |
258 | ||
1ab256cb RM |
259 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
260 | "Return the buffer named NAME (a string).\n\ | |
261 | If there is no live buffer named NAME, return nil.\n\ | |
262 | NAME may also be a buffer; if so, the value is that buffer.") | |
263 | (name) | |
264 | register Lisp_Object name; | |
265 | { | |
a7a60ce9 | 266 | if (BUFFERP (name)) |
1ab256cb RM |
267 | return name; |
268 | CHECK_STRING (name, 0); | |
269 | ||
04ae1b48 | 270 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
271 | } |
272 | ||
273 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
274 | "Return the buffer visiting file FILENAME (a string).\n\ | |
92194d02 | 275 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
11da5363 RS |
276 | If there is no such live buffer, return nil.\n\ |
277 | See also `find-buffer-visiting'.") | |
1ab256cb RM |
278 | (filename) |
279 | register Lisp_Object filename; | |
280 | { | |
281 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
282 | Lisp_Object handler; |
283 | ||
1ab256cb RM |
284 | CHECK_STRING (filename, 0); |
285 | filename = Fexpand_file_name (filename, Qnil); | |
286 | ||
5fe0b67e RS |
287 | /* If the file name has special constructs in it, |
288 | call the corresponding file handler. */ | |
a617e913 | 289 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
290 | if (!NILP (handler)) |
291 | return call2 (handler, Qget_file_buffer, filename); | |
292 | ||
7539e11f | 293 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 294 | { |
7539e11f | 295 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
296 | if (!BUFFERP (buf)) continue; |
297 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 298 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 299 | if (!NILP (tem)) |
1ab256cb RM |
300 | return buf; |
301 | } | |
302 | return Qnil; | |
303 | } | |
304 | ||
52e01189 RS |
305 | Lisp_Object |
306 | get_truename_buffer (filename) | |
307 | register Lisp_Object filename; | |
308 | { | |
309 | register Lisp_Object tail, buf, tem; | |
310 | ||
7539e11f | 311 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 312 | { |
7539e11f | 313 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
314 | if (!BUFFERP (buf)) continue; |
315 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
316 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
317 | if (!NILP (tem)) | |
318 | return buf; | |
319 | } | |
320 | return Qnil; | |
321 | } | |
322 | ||
1ab256cb RM |
323 | /* Incremented for each buffer created, to assign the buffer number. */ |
324 | int buffer_count; | |
325 | ||
326 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
327 | "Return the buffer named NAME, or create such a buffer and return it.\n\ | |
328 | A new buffer is created if there is no live buffer named NAME.\n\ | |
b44895bc | 329 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
1ab256cb RM |
330 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
331 | The value is never nil.") | |
332 | (name) | |
333 | register Lisp_Object name; | |
334 | { | |
a9ee7a59 | 335 | register Lisp_Object buf; |
1ab256cb RM |
336 | register struct buffer *b; |
337 | ||
338 | buf = Fget_buffer (name); | |
265a9e55 | 339 | if (!NILP (buf)) |
1ab256cb RM |
340 | return buf; |
341 | ||
31cd83e9 KH |
342 | if (XSTRING (name)->size == 0) |
343 | error ("Empty string for buffer name is not allowed"); | |
344 | ||
a21260d9 | 345 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 346 | |
336cd056 RS |
347 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
348 | ||
349 | /* An ordinary buffer uses its own struct buffer_text. */ | |
350 | b->text = &b->own_text; | |
351 | b->base_buffer = 0; | |
352 | ||
1ab256cb | 353 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 354 | BLOCK_INPUT; |
3b06f880 KH |
355 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
356 | anchoring a search. */ | |
b86af064 | 357 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 358 | UNBLOCK_INPUT; |
1ab256cb | 359 | if (! BUF_BEG_ADDR (b)) |
81841847 | 360 | buffer_memory_full (); |
1ab256cb RM |
361 | |
362 | BUF_PT (b) = 1; | |
363 | BUF_GPT (b) = 1; | |
364 | BUF_BEGV (b) = 1; | |
365 | BUF_ZV (b) = 1; | |
366 | BUF_Z (b) = 1; | |
3f236a40 RS |
367 | BUF_PT_BYTE (b) = 1; |
368 | BUF_GPT_BYTE (b) = 1; | |
369 | BUF_BEGV_BYTE (b) = 1; | |
370 | BUF_ZV_BYTE (b) = 1; | |
371 | BUF_Z_BYTE (b) = 1; | |
1ab256cb | 372 | BUF_MODIFF (b) = 1; |
2509d356 | 373 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
374 | BUF_SAVE_MODIFF (b) = 1; |
375 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
376 | BUF_UNCHANGED_MODIFIED (b) = 1; |
377 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
378 | BUF_END_UNCHANGED (b) = 0; | |
379 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 380 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 381 | |
28e969dd JB |
382 | b->newline_cache = 0; |
383 | b->width_run_cache = 0; | |
384 | b->width_table = Qnil; | |
b5a225b4 | 385 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 386 | |
1ab256cb RM |
387 | /* Put this on the chain of all buffers including killed ones. */ |
388 | b->next = all_buffers; | |
389 | all_buffers = b; | |
390 | ||
336cd056 RS |
391 | /* An ordinary buffer normally doesn't need markers |
392 | to handle BEGV and ZV. */ | |
393 | b->pt_marker = Qnil; | |
394 | b->begv_marker = Qnil; | |
395 | b->zv_marker = Qnil; | |
04ae1b48 RS |
396 | |
397 | name = Fcopy_sequence (name); | |
a9800ae8 | 398 | XSTRING (name)->intervals = NULL_INTERVAL; |
1ab256cb | 399 | b->name = name; |
04ae1b48 | 400 | |
1ab256cb RM |
401 | if (XSTRING (name)->data[0] != ' ') |
402 | b->undo_list = Qnil; | |
403 | else | |
404 | b->undo_list = Qt; | |
405 | ||
406 | reset_buffer (b); | |
13de9290 | 407 | reset_buffer_local_variables (b, 1); |
1ab256cb RM |
408 | |
409 | /* Put this in the alist of all live buffers. */ | |
67180c6a | 410 | XSETBUFFER (buf, b); |
1ab256cb RM |
411 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
412 | ||
413 | b->mark = Fmake_marker (); | |
336cd056 RS |
414 | BUF_MARKERS (b) = Qnil; |
415 | b->name = name; | |
416 | return buf; | |
417 | } | |
418 | ||
7e9d5818 | 419 | |
04e4cb3a GM |
420 | /* Return a list of overlays which is a copy of the overlay list |
421 | LIST, but for buffer B. */ | |
422 | ||
423 | static Lisp_Object | |
424 | copy_overlays (b, list) | |
425 | struct buffer *b; | |
426 | Lisp_Object list; | |
427 | { | |
428 | Lisp_Object result, buffer; | |
429 | ||
430 | XSETBUFFER (buffer, b); | |
431 | ||
432 | for (result = Qnil; CONSP (list); list = XCDR (list)) | |
433 | { | |
434 | Lisp_Object overlay, start, end, old_overlay; | |
435 | int charpos; | |
436 | ||
437 | old_overlay = XCAR (list); | |
438 | charpos = marker_position (OVERLAY_START (old_overlay)); | |
439 | start = Fmake_marker (); | |
db3a49a6 | 440 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
441 | XMARKER (start)->insertion_type |
442 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
443 | ||
444 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
445 | end = Fmake_marker (); | |
db3a49a6 | 446 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
447 | XMARKER (end)->insertion_type |
448 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
449 | ||
450 | overlay = allocate_misc (); | |
451 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
452 | OVERLAY_START (overlay) = start; | |
453 | OVERLAY_END (overlay) = end; | |
454 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
455 | ||
456 | result = Fcons (overlay, result); | |
457 | } | |
458 | ||
459 | return Fnreverse (result); | |
460 | } | |
461 | ||
462 | ||
7e9d5818 GM |
463 | /* Clone per-buffer values of buffer FROM. |
464 | ||
465 | Buffer TO gets the same per-buffer values as FROM, with the | |
466 | following exceptions: (1) TO's name is left untouched, (2) markers | |
467 | are copied and made to refer to TO, and (3) overlay lists are | |
468 | copied. */ | |
469 | ||
470 | static void | |
471 | clone_per_buffer_values (from, to) | |
472 | struct buffer *from, *to; | |
473 | { | |
474 | Lisp_Object to_buffer; | |
475 | int offset; | |
476 | ||
477 | XSETBUFFER (to_buffer, to); | |
478 | ||
479 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); | |
480 | offset < sizeof *to; | |
481 | offset += sizeof (Lisp_Object)) | |
482 | { | |
483 | Lisp_Object obj; | |
484 | ||
485 | obj = PER_BUFFER_VALUE (from, offset); | |
486 | if (MARKERP (obj)) | |
487 | { | |
488 | struct Lisp_Marker *m = XMARKER (obj); | |
489 | obj = Fmake_marker (); | |
490 | XMARKER (obj)->insertion_type = m->insertion_type; | |
491 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
492 | } | |
493 | ||
494 | PER_BUFFER_VALUE (to, offset) = obj; | |
495 | } | |
496 | ||
7e9d5818 | 497 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
04e4cb3a GM |
498 | |
499 | to->overlays_before = copy_overlays (to, from->overlays_before); | |
500 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
7e9d5818 GM |
501 | } |
502 | ||
503 | ||
504 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, | |
505 | 2, 3, | |
193c3837 | 506 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
a2428fa2 EN |
507 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
508 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ | |
7e9d5818 GM |
509 | NAME should be a string which is not the name of an existing buffer.\n\ |
510 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state,\n\ | |
f532dca0 | 511 | such as major and minor modes, in the indirect buffer.\n\ |
7e9d5818 GM |
512 | CLONE nil means the indirect buffer's state is reset to default values.") |
513 | (base_buffer, name, clone) | |
514 | Lisp_Object base_buffer, name, clone; | |
336cd056 | 515 | { |
7e9d5818 GM |
516 | Lisp_Object buf; |
517 | struct buffer *b; | |
336cd056 RS |
518 | |
519 | buf = Fget_buffer (name); | |
520 | if (!NILP (buf)) | |
521 | error ("Buffer name `%s' is in use", XSTRING (name)->data); | |
522 | ||
523 | base_buffer = Fget_buffer (base_buffer); | |
524 | if (NILP (base_buffer)) | |
1dd6a7ad | 525 | error ("No such buffer: `%s'", XSTRING (name)->data); |
336cd056 RS |
526 | |
527 | if (XSTRING (name)->size == 0) | |
528 | error ("Empty string for buffer name is not allowed"); | |
529 | ||
a21260d9 | 530 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
531 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
532 | ||
533 | if (XBUFFER (base_buffer)->base_buffer) | |
534 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
535 | else | |
536 | b->base_buffer = XBUFFER (base_buffer); | |
537 | ||
538 | /* Use the base buffer's text object. */ | |
539 | b->text = b->base_buffer->text; | |
540 | ||
541 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
542 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
543 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
544 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
545 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
546 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
547 | |
548 | b->newline_cache = 0; | |
549 | b->width_run_cache = 0; | |
550 | b->width_table = Qnil; | |
551 | ||
552 | /* Put this on the chain of all buffers including killed ones. */ | |
553 | b->next = all_buffers; | |
554 | all_buffers = b; | |
555 | ||
556 | name = Fcopy_sequence (name); | |
a9800ae8 | 557 | XSTRING (name)->intervals = NULL_INTERVAL; |
336cd056 RS |
558 | b->name = name; |
559 | ||
560 | reset_buffer (b); | |
13de9290 | 561 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
562 | |
563 | /* Put this in the alist of all live buffers. */ | |
564 | XSETBUFFER (buf, b); | |
565 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
566 | ||
567 | b->mark = Fmake_marker (); | |
1ab256cb | 568 | b->name = name; |
336cd056 | 569 | |
abc9d959 RS |
570 | /* The multibyte status belongs to the base buffer. */ |
571 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
572 | ||
336cd056 RS |
573 | /* Make sure the base buffer has markers for its narrowing. */ |
574 | if (NILP (b->base_buffer->pt_marker)) | |
575 | { | |
576 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
577 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
578 | BUF_PT (b->base_buffer), | |
579 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
580 | } |
581 | if (NILP (b->base_buffer->begv_marker)) | |
582 | { | |
583 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
584 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
585 | BUF_BEGV (b->base_buffer), | |
586 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
587 | } |
588 | if (NILP (b->base_buffer->zv_marker)) | |
589 | { | |
590 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
591 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
592 | BUF_ZV (b->base_buffer), | |
593 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 594 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
595 | } |
596 | ||
7e9d5818 GM |
597 | if (NILP (clone)) |
598 | { | |
599 | /* Give the indirect buffer markers for its narrowing. */ | |
600 | b->pt_marker = Fmake_marker (); | |
601 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
602 | b->begv_marker = Fmake_marker (); | |
603 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
604 | b->zv_marker = Fmake_marker (); | |
605 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
606 | XMARKER (b->zv_marker)->insertion_type = 1; | |
607 | } | |
608 | else | |
609 | clone_per_buffer_values (b->base_buffer, b); | |
336cd056 | 610 | |
a9ee7a59 | 611 | return buf; |
1ab256cb RM |
612 | } |
613 | ||
bcd40520 RS |
614 | /* Reinitialize everything about a buffer except its name and contents |
615 | and local variables. */ | |
1ab256cb RM |
616 | |
617 | void | |
618 | reset_buffer (b) | |
619 | register struct buffer *b; | |
620 | { | |
621 | b->filename = Qnil; | |
f6ed2e84 | 622 | b->file_truename = Qnil; |
1ab256cb RM |
623 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
624 | b->modtime = 0; | |
8d7a4592 | 625 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 626 | b->last_window_start = 1; |
8b264726 | 627 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
628 | b->clip_changed = 0; |
629 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
630 | b->backed_up = Qnil; |
631 | b->auto_save_modified = 0; | |
84f6bcba | 632 | b->auto_save_failure_time = -1; |
1ab256cb RM |
633 | b->auto_save_file_name = Qnil; |
634 | b->read_only = Qnil; | |
2eec3b4e RS |
635 | b->overlays_before = Qnil; |
636 | b->overlays_after = Qnil; | |
8d7a4592 | 637 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 638 | b->mark_active = Qnil; |
943e065b | 639 | b->point_before_scroll = Qnil; |
be9aafdd | 640 | b->file_format = Qnil; |
0dc6f165 | 641 | b->last_selected_window = Qnil; |
7962a441 | 642 | XSETINT (b->display_count, 0); |
3fd364db | 643 | b->display_time = Qnil; |
1bf08baf | 644 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 645 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 646 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
1ab256cb RM |
647 | } |
648 | ||
bcd40520 RS |
649 | /* Reset buffer B's local variables info. |
650 | Don't use this on a buffer that has already been in use; | |
651 | it does not treat permanent locals consistently. | |
13de9290 RS |
652 | Instead, use Fkill_all_local_variables. |
653 | ||
654 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
655 | buffer-local variables. If PERMANENT_TOO is 0, | |
656 | we preserve those. */ | |
bcd40520 | 657 | |
13de9290 RS |
658 | static void |
659 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 660 | register struct buffer *b; |
13de9290 | 661 | int permanent_too; |
1ab256cb RM |
662 | { |
663 | register int offset; | |
7c02e886 | 664 | int i; |
1ab256cb RM |
665 | |
666 | /* Reset the major mode to Fundamental, together with all the | |
667 | things that depend on the major mode. | |
668 | default-major-mode is handled at a higher level. | |
669 | We ignore it here. */ | |
670 | b->major_mode = Qfundamental_mode; | |
671 | b->keymap = Qnil; | |
672 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
673 | b->mode_name = QSFundamental; | |
674 | b->minor_modes = Qnil; | |
3446af9c RS |
675 | |
676 | /* If the standard case table has been altered and invalidated, | |
677 | fix up its insides first. */ | |
678 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
679 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
680 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
681 | Fset_standard_case_table (Vascii_downcase_table); | |
682 | ||
1ab256cb | 683 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
684 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
685 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
686 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 687 | b->invisibility_spec = Qt; |
2e716096 RS |
688 | #ifndef DOS_NT |
689 | b->buffer_file_type = Qnil; | |
690 | #endif | |
3cb719bd | 691 | |
1ab256cb RM |
692 | #if 0 |
693 | b->sort_table = XSTRING (Vascii_sort_table); | |
694 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); | |
695 | #endif /* 0 */ | |
696 | ||
13de9290 | 697 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 698 | b->local_var_alist = Qnil; |
7313acd0 | 699 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 700 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 701 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
702 | |
703 | /* For each slot that has a default value, | |
704 | copy that into the slot. */ | |
705 | ||
7313acd0 | 706 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
707 | offset < sizeof *b; |
708 | offset += sizeof (Lisp_Object)) | |
aab80822 | 709 | { |
7313acd0 | 710 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
711 | if ((idx > 0 |
712 | && (permanent_too | |
713 | || buffer_permanent_local_flags[idx] == 0)) | |
714 | /* Is -2 used anywhere? */ | |
715 | || idx == -2) | |
7313acd0 | 716 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 717 | } |
1ab256cb RM |
718 | } |
719 | ||
01050cb5 RM |
720 | /* We split this away from generate-new-buffer, because rename-buffer |
721 | and set-visited-file-name ought to be able to use this to really | |
722 | rename the buffer properly. */ | |
723 | ||
724 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
c273e647 | 725 | 1, 2, 0, |
01050cb5 RM |
726 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
727 | If there is no live buffer named NAME, then return NAME.\n\ | |
1ab256cb | 728 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
c273e647 | 729 | until an unused name is found, and then return that name.\n\ |
03bdd54c | 730 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
c273e647 | 731 | \(if it is in the sequence to be tried)\n\ |
e8b3a22d | 732 | even if a buffer with that name exists.") |
c273e647 RS |
733 | (name, ignore) |
734 | register Lisp_Object name, ignore; | |
1ab256cb RM |
735 | { |
736 | register Lisp_Object gentemp, tem; | |
737 | int count; | |
738 | char number[10]; | |
739 | ||
740 | CHECK_STRING (name, 0); | |
741 | ||
742 | tem = Fget_buffer (name); | |
265a9e55 | 743 | if (NILP (tem)) |
01050cb5 | 744 | return name; |
1ab256cb RM |
745 | |
746 | count = 1; | |
747 | while (1) | |
748 | { | |
749 | sprintf (number, "<%d>", ++count); | |
750 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 751 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
752 | if (!NILP (tem)) |
753 | return gentemp; | |
1ab256cb | 754 | tem = Fget_buffer (gentemp); |
265a9e55 | 755 | if (NILP (tem)) |
01050cb5 | 756 | return gentemp; |
1ab256cb RM |
757 | } |
758 | } | |
759 | ||
760 | \f | |
761 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
762 | "Return the name of BUFFER, as a string.\n\ | |
01050cb5 | 763 | With no argument or nil as argument, return the name of the current buffer.") |
1ab256cb RM |
764 | (buffer) |
765 | register Lisp_Object buffer; | |
766 | { | |
265a9e55 | 767 | if (NILP (buffer)) |
1ab256cb RM |
768 | return current_buffer->name; |
769 | CHECK_BUFFER (buffer, 0); | |
770 | return XBUFFER (buffer)->name; | |
771 | } | |
772 | ||
773 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
774 | "Return name of file BUFFER is visiting, or nil if none.\n\ | |
775 | No argument or nil as argument means use the current buffer.") | |
776 | (buffer) | |
777 | register Lisp_Object buffer; | |
778 | { | |
265a9e55 | 779 | if (NILP (buffer)) |
1ab256cb RM |
780 | return current_buffer->filename; |
781 | CHECK_BUFFER (buffer, 0); | |
782 | return XBUFFER (buffer)->filename; | |
783 | } | |
784 | ||
336cd056 RS |
785 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
786 | 0, 1, 0, | |
787 | "Return the base buffer of indirect buffer BUFFER.\n\ | |
788 | If BUFFER is not indirect, return nil.") | |
789 | (buffer) | |
790 | register Lisp_Object buffer; | |
791 | { | |
792 | struct buffer *base; | |
793 | Lisp_Object base_buffer; | |
794 | ||
795 | if (NILP (buffer)) | |
796 | base = current_buffer->base_buffer; | |
797 | else | |
798 | { | |
799 | CHECK_BUFFER (buffer, 0); | |
800 | base = XBUFFER (buffer)->base_buffer; | |
801 | } | |
802 | ||
803 | if (! base) | |
804 | return Qnil; | |
805 | XSETBUFFER (base_buffer, base); | |
806 | return base_buffer; | |
807 | } | |
808 | ||
1ab256cb RM |
809 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
810 | Sbuffer_local_variables, 0, 1, 0, | |
811 | "Return an alist of variables that are buffer-local in BUFFER.\n\ | |
553defa4 RS |
812 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
813 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ | |
1ab256cb RM |
814 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
815 | No argument or nil as argument means use current buffer as BUFFER.") | |
816 | (buffer) | |
817 | register Lisp_Object buffer; | |
818 | { | |
819 | register struct buffer *buf; | |
553defa4 | 820 | register Lisp_Object result; |
1ab256cb | 821 | |
265a9e55 | 822 | if (NILP (buffer)) |
1ab256cb RM |
823 | buf = current_buffer; |
824 | else | |
825 | { | |
826 | CHECK_BUFFER (buffer, 0); | |
827 | buf = XBUFFER (buffer); | |
828 | } | |
829 | ||
553defa4 RS |
830 | result = Qnil; |
831 | ||
1ab256cb | 832 | { |
553defa4 | 833 | register Lisp_Object tail; |
7539e11f | 834 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 835 | { |
553defa4 RS |
836 | Lisp_Object val, elt; |
837 | ||
7539e11f | 838 | elt = XCAR (tail); |
553defa4 | 839 | |
e0585c64 RS |
840 | /* Reference each variable in the alist in buf. |
841 | If inquiring about the current buffer, this gets the current values, | |
842 | so store them into the alist so the alist is up to date. | |
843 | If inquiring about some other buffer, this swaps out any values | |
844 | for that buffer, making the alist up to date automatically. */ | |
7539e11f | 845 | val = find_symbol_value (XCAR (elt)); |
e0585c64 RS |
846 | /* Use the current buffer value only if buf is the current buffer. */ |
847 | if (buf != current_buffer) | |
7539e11f | 848 | val = XCDR (elt); |
553defa4 RS |
849 | |
850 | /* If symbol is unbound, put just the symbol in the list. */ | |
851 | if (EQ (val, Qunbound)) | |
7539e11f | 852 | result = Fcons (XCAR (elt), result); |
553defa4 RS |
853 | /* Otherwise, put (symbol . value) in the list. */ |
854 | else | |
7539e11f | 855 | result = Fcons (Fcons (XCAR (elt), val), result); |
1ab256cb RM |
856 | } |
857 | } | |
858 | ||
1ab256cb RM |
859 | /* Add on all the variables stored in special slots. */ |
860 | { | |
7c02e886 | 861 | int offset, idx; |
1ab256cb | 862 | |
7313acd0 | 863 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 864 | offset < sizeof (struct buffer); |
7c02e886 GM |
865 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
866 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 867 | { |
7313acd0 GM |
868 | idx = PER_BUFFER_IDX (offset); |
869 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
870 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
871 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
872 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 873 | result); |
1ab256cb RM |
874 | } |
875 | } | |
553defa4 RS |
876 | |
877 | return result; | |
1ab256cb RM |
878 | } |
879 | ||
880 | \f | |
881 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
882 | 0, 1, 0, | |
883 | "Return t if BUFFER was modified since its file was last read or saved.\n\ | |
884 | No argument or nil as argument means use current buffer as BUFFER.") | |
885 | (buffer) | |
886 | register Lisp_Object buffer; | |
887 | { | |
888 | register struct buffer *buf; | |
265a9e55 | 889 | if (NILP (buffer)) |
1ab256cb RM |
890 | buf = current_buffer; |
891 | else | |
892 | { | |
893 | CHECK_BUFFER (buffer, 0); | |
894 | buf = XBUFFER (buffer); | |
895 | } | |
896 | ||
336cd056 | 897 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
898 | } |
899 | ||
900 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
901 | 1, 1, 0, | |
902 | "Mark current buffer as modified or unmodified according to FLAG.\n\ | |
903 | A non-nil FLAG means mark the buffer modified.") | |
904 | (flag) | |
905 | register Lisp_Object flag; | |
906 | { | |
907 | register int already; | |
908 | register Lisp_Object fn; | |
8ec01c70 | 909 | Lisp_Object buffer, window; |
1ab256cb RM |
910 | |
911 | #ifdef CLASH_DETECTION | |
912 | /* If buffer becoming modified, lock the file. | |
913 | If buffer becoming unmodified, unlock the file. */ | |
914 | ||
60f4dd23 | 915 | fn = current_buffer->file_truename; |
90d456d2 KH |
916 | /* Test buffer-file-name so that binding it to nil is effective. */ |
917 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 918 | { |
336cd056 | 919 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 920 | if (!already && !NILP (flag)) |
1ab256cb | 921 | lock_file (fn); |
265a9e55 | 922 | else if (already && NILP (flag)) |
1ab256cb RM |
923 | unlock_file (fn); |
924 | } | |
925 | #endif /* CLASH_DETECTION */ | |
926 | ||
336cd056 | 927 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
8ec01c70 GM |
928 | |
929 | /* Set update_mode_lines only if buffer is displayed in some window. | |
930 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
931 | state by recording/restoring the state around blocks of code. | |
932 | Setting update_mode_lines makes redisplay consider all windows | |
933 | (on all frames). Stealth fontification of buffers not displayed | |
934 | would incur additional redisplay costs if we'd set | |
935 | update_modes_lines unconditionally. | |
936 | ||
937 | Ideally, I think there should be another mechanism for fontifying | |
938 | buffers without "modifying" buffers, or redisplay should be | |
939 | smarter about updating the `*' in mode lines. --gerd */ | |
940 | XSETBUFFER (buffer, current_buffer); | |
941 | window = Fget_buffer_window (buffer, Qt); | |
942 | if (WINDOWP (window)) | |
d57b83b3 GM |
943 | { |
944 | ++update_mode_lines; | |
945 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
946 | } | |
8ec01c70 | 947 | |
1ab256cb RM |
948 | return flag; |
949 | } | |
950 | ||
a8c21b48 GM |
951 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
952 | Srestore_buffer_modified_p, 1, 1, 0, | |
953 | "Like `set-buffer-modified-p', with a differences concerning redisplay.\n\ | |
954 | It is not ensured that mode lines will be updated to show the modified\n\ | |
955 | state of the current buffer. Use with care.") | |
956 | (flag) | |
957 | Lisp_Object flag; | |
958 | { | |
959 | #ifdef CLASH_DETECTION | |
960 | Lisp_Object fn; | |
961 | ||
962 | /* If buffer becoming modified, lock the file. | |
963 | If buffer becoming unmodified, unlock the file. */ | |
964 | ||
965 | fn = current_buffer->file_truename; | |
966 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
967 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
968 | { | |
969 | int already = SAVE_MODIFF < MODIFF; | |
970 | if (!already && !NILP (flag)) | |
971 | lock_file (fn); | |
972 | else if (already && NILP (flag)) | |
973 | unlock_file (fn); | |
974 | } | |
975 | #endif /* CLASH_DETECTION */ | |
976 | ||
977 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; | |
978 | return flag; | |
979 | } | |
980 | ||
1ab256cb RM |
981 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
982 | 0, 1, 0, | |
983 | "Return BUFFER's tick counter, incremented for each change in text.\n\ | |
984 | Each buffer has a tick counter which is incremented each time the text in\n\ | |
985 | that buffer is changed. It wraps around occasionally.\n\ | |
986 | No argument or nil as argument means use current buffer as BUFFER.") | |
987 | (buffer) | |
988 | register Lisp_Object buffer; | |
989 | { | |
990 | register struct buffer *buf; | |
265a9e55 | 991 | if (NILP (buffer)) |
1ab256cb RM |
992 | buf = current_buffer; |
993 | else | |
994 | { | |
995 | CHECK_BUFFER (buffer, 0); | |
996 | buf = XBUFFER (buffer); | |
997 | } | |
998 | ||
999 | return make_number (BUF_MODIFF (buf)); | |
1000 | } | |
1001 | \f | |
01050cb5 | 1002 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1003 | "sRename buffer (to new name): \nP", |
1ab256cb | 1004 | "Change current buffer's name to NEWNAME (a string).\n\ |
3bd779aa | 1005 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
01050cb5 | 1006 | buffer named NEWNAME already exists.\n\ |
3bd779aa | 1007 | If UNIQUE is non-nil, come up with a new name using\n\ |
01050cb5 | 1008 | `generate-new-buffer-name'.\n\ |
3bd779aa RS |
1009 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
1010 | We return the name we actually gave the buffer.\n\ | |
1ab256cb | 1011 | This does not change the name of the visited file (if any).") |
489c043a RS |
1012 | (newname, unique) |
1013 | register Lisp_Object newname, unique; | |
1ab256cb RM |
1014 | { |
1015 | register Lisp_Object tem, buf; | |
1016 | ||
489c043a | 1017 | CHECK_STRING (newname, 0); |
d59698c4 | 1018 | |
489c043a | 1019 | if (XSTRING (newname)->size == 0) |
d59698c4 RS |
1020 | error ("Empty string is invalid as a buffer name"); |
1021 | ||
489c043a | 1022 | tem = Fget_buffer (newname); |
265a9e55 | 1023 | if (!NILP (tem)) |
01050cb5 | 1024 | { |
8801a864 KR |
1025 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1026 | rename the buffer automatically so you can create another | |
1027 | with the original name. It makes UNIQUE equivalent to | |
1028 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1029 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1030 | return current_buffer->name; | |
3bd779aa | 1031 | if (!NILP (unique)) |
489c043a | 1032 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1033 | else |
489c043a | 1034 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
01050cb5 | 1035 | } |
1ab256cb | 1036 | |
489c043a | 1037 | current_buffer->name = newname; |
76f590d7 JB |
1038 | |
1039 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1040 | any windows displaying current_buffer will stay unchanged. */ | |
1041 | update_mode_lines++; | |
1042 | ||
67180c6a | 1043 | XSETBUFFER (buf, current_buffer); |
489c043a | 1044 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1045 | if (NILP (current_buffer->filename) |
1046 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1047 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1048 | /* Refetch since that last call may have done GC. */ |
1049 | return current_buffer->name; | |
1ab256cb RM |
1050 | } |
1051 | ||
773fbdb9 | 1052 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
1ab256cb | 1053 | "Return most recently selected buffer other than BUFFER.\n\ |
a0ebb746 JB |
1054 | Buffers not visible in windows are preferred to visible buffers,\n\ |
1055 | unless optional second argument VISIBLE-OK is non-nil.\n\ | |
97c3c30c RS |
1056 | If the optional third argument FRAME is non-nil, use that frame's\n\ |
1057 | buffer list instead of the selected frame's buffer list.\n\ | |
1ab256cb RM |
1058 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
1059 | If BUFFER is omitted or nil, some interesting buffer is returned.") | |
773fbdb9 RS |
1060 | (buffer, visible_ok, frame) |
1061 | register Lisp_Object buffer, visible_ok, frame; | |
1ab256cb | 1062 | { |
89132f25 | 1063 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1064 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1065 | notsogood = Qnil; |
1066 | ||
773fbdb9 | 1067 | if (NILP (frame)) |
9ba9623d | 1068 | frame = selected_frame; |
773fbdb9 | 1069 | |
7962a441 | 1070 | tail = Vbuffer_alist; |
773fbdb9 | 1071 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1072 | |
1073 | /* Consider buffers that have been seen in the selected frame | |
1074 | before other buffers. */ | |
1075 | ||
773fbdb9 | 1076 | tem = frame_buffer_list (frame); |
7962a441 RS |
1077 | add_ons = Qnil; |
1078 | while (CONSP (tem)) | |
1079 | { | |
7539e11f KR |
1080 | if (BUFFERP (XCAR (tem))) |
1081 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1082 | tem = XCDR (tem); | |
7962a441 RS |
1083 | } |
1084 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1085 | ||
1086 | for (; !NILP (tail); tail = Fcdr (tail)) | |
1ab256cb RM |
1087 | { |
1088 | buf = Fcdr (Fcar (tail)); | |
1089 | if (EQ (buf, buffer)) | |
1090 | continue; | |
1091 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') | |
1092 | continue; | |
04ae1b48 RS |
1093 | /* If the selected frame has a buffer_predicate, |
1094 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1095 | if (!NILP (pred)) |
04ae1b48 | 1096 | { |
7962a441 | 1097 | tem = call1 (pred, buf); |
04ae1b48 RS |
1098 | if (NILP (tem)) |
1099 | continue; | |
1100 | } | |
04ae1b48 | 1101 | |
a0ebb746 | 1102 | if (NILP (visible_ok)) |
66ffe51c | 1103 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1104 | else |
1105 | tem = Qnil; | |
265a9e55 | 1106 | if (NILP (tem)) |
1ab256cb | 1107 | return buf; |
265a9e55 | 1108 | if (NILP (notsogood)) |
1ab256cb RM |
1109 | notsogood = buf; |
1110 | } | |
265a9e55 | 1111 | if (!NILP (notsogood)) |
1ab256cb | 1112 | return notsogood; |
dba1a30a GM |
1113 | buf = Fget_buffer (build_string ("*scratch*")); |
1114 | if (NILP (buf)) | |
1115 | { | |
1116 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1117 | Fset_buffer_major_mode (buf); | |
1118 | } | |
89132f25 | 1119 | return buf; |
1ab256cb RM |
1120 | } |
1121 | \f | |
316784fb KH |
1122 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
1123 | 0, 1, "", | |
5b8bcf48 RS |
1124 | "Make BUFFER stop keeping undo information.\n\ |
1125 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
1126 | (buffer) |
1127 | register Lisp_Object buffer; | |
1ab256cb | 1128 | { |
ffd56f97 JB |
1129 | Lisp_Object real_buffer; |
1130 | ||
1131 | if (NILP (buffer)) | |
67180c6a | 1132 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
1133 | else |
1134 | { | |
1135 | real_buffer = Fget_buffer (buffer); | |
1136 | if (NILP (real_buffer)) | |
1137 | nsberror (buffer); | |
1138 | } | |
1139 | ||
1140 | XBUFFER (real_buffer)->undo_list = Qt; | |
1141 | ||
1ab256cb RM |
1142 | return Qnil; |
1143 | } | |
1144 | ||
1145 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
1146 | 0, 1, "", | |
1147 | "Start keeping undo information for buffer BUFFER.\n\ | |
1148 | No argument or nil as argument means do this for the current buffer.") | |
ffd56f97 JB |
1149 | (buffer) |
1150 | register Lisp_Object buffer; | |
1ab256cb | 1151 | { |
ffd56f97 | 1152 | Lisp_Object real_buffer; |
1ab256cb | 1153 | |
ffd56f97 | 1154 | if (NILP (buffer)) |
67180c6a | 1155 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1156 | else |
1157 | { | |
ffd56f97 JB |
1158 | real_buffer = Fget_buffer (buffer); |
1159 | if (NILP (real_buffer)) | |
1160 | nsberror (buffer); | |
1ab256cb RM |
1161 | } |
1162 | ||
ffd56f97 JB |
1163 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1164 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1165 | |
1166 | return Qnil; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1171 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1172 | The buffer being killed will be current while the hook is running.\n\ | |
1173 | See `kill-buffer'." | |
1174 | */ | |
1175 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
1176 | "Kill the buffer BUFFER.\n\ | |
1177 | The argument may be a buffer or may be the name of a buffer.\n\ | |
1178 | An argument of nil means kill the current buffer.\n\n\ | |
1179 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ | |
1180 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ | |
1181 | if not void, is a list of functions to be called, with no arguments,\n\ | |
1182 | before the buffer is actually killed. The buffer to be killed is current\n\ | |
1183 | when the hook functions are called.\n\n\ | |
1184 | Any processes that have this buffer as the `process-buffer' are killed\n\ | |
b64d7442 | 1185 | with SIGHUP.") |
a25f13ae KH |
1186 | (buffer) |
1187 | Lisp_Object buffer; | |
1ab256cb RM |
1188 | { |
1189 | Lisp_Object buf; | |
1190 | register struct buffer *b; | |
1191 | register Lisp_Object tem; | |
1192 | register struct Lisp_Marker *m; | |
6af718a4 | 1193 | struct gcpro gcpro1; |
1ab256cb | 1194 | |
a25f13ae | 1195 | if (NILP (buffer)) |
1ab256cb RM |
1196 | buf = Fcurrent_buffer (); |
1197 | else | |
a25f13ae | 1198 | buf = Fget_buffer (buffer); |
265a9e55 | 1199 | if (NILP (buf)) |
a25f13ae | 1200 | nsberror (buffer); |
1ab256cb RM |
1201 | |
1202 | b = XBUFFER (buf); | |
1203 | ||
4a4a9db5 KH |
1204 | /* Avoid trouble for buffer already dead. */ |
1205 | if (NILP (b->name)) | |
1206 | return Qnil; | |
1207 | ||
1ab256cb | 1208 | /* Query if the buffer is still modified. */ |
265a9e55 | 1209 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1210 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1211 | { |
a25f13ae | 1212 | GCPRO1 (buf); |
1ab256cb RM |
1213 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
1214 | XSTRING (b->name)->data)); | |
1215 | UNGCPRO; | |
265a9e55 | 1216 | if (NILP (tem)) |
1ab256cb RM |
1217 | return Qnil; |
1218 | } | |
1219 | ||
dcdffbf6 | 1220 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1221 | { |
1ab256cb | 1222 | int count = specpdl_ptr - specpdl; |
dcdffbf6 | 1223 | Lisp_Object list; |
1ab256cb RM |
1224 | |
1225 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1226 | set_buffer_internal (b); | |
dcdffbf6 RS |
1227 | |
1228 | /* First run the query functions; if any query is answered no, | |
1229 | don't kill the buffer. */ | |
1230 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) | |
1231 | { | |
1232 | tem = call0 (Fcar (list)); | |
1233 | if (NILP (tem)) | |
1234 | return unbind_to (count, Qnil); | |
1235 | } | |
1236 | ||
1237 | /* Then run the hooks. */ | |
fd186f07 RS |
1238 | if (!NILP (Vrun_hooks)) |
1239 | call1 (Vrun_hooks, Qkill_buffer_hook); | |
1ab256cb RM |
1240 | unbind_to (count, Qnil); |
1241 | } | |
1242 | ||
1243 | /* We have no more questions to ask. Verify that it is valid | |
1244 | to kill the buffer. This must be done after the questions | |
1245 | since anything can happen within do_yes_or_no_p. */ | |
1246 | ||
1247 | /* Don't kill the minibuffer now current. */ | |
1248 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1249 | return Qnil; | |
1250 | ||
265a9e55 | 1251 | if (NILP (b->name)) |
1ab256cb RM |
1252 | return Qnil; |
1253 | ||
336cd056 RS |
1254 | /* When we kill a base buffer, kill all its indirect buffers. |
1255 | We do it at this stage so nothing terrible happens if they | |
1256 | ask questions or their hooks get errors. */ | |
1257 | if (! b->base_buffer) | |
1258 | { | |
1259 | struct buffer *other; | |
1260 | ||
1261 | GCPRO1 (buf); | |
1262 | ||
1263 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1264 | /* all_buffers contains dead buffers too; |
1265 | don't re-kill them. */ | |
1266 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1267 | { |
1268 | Lisp_Object buf; | |
1269 | XSETBUFFER (buf, other); | |
1270 | Fkill_buffer (buf); | |
1271 | } | |
1272 | ||
1273 | UNGCPRO; | |
1274 | } | |
1275 | ||
1ab256cb RM |
1276 | /* Make this buffer not be current. |
1277 | In the process, notice if this is the sole visible buffer | |
1278 | and give up if so. */ | |
1279 | if (b == current_buffer) | |
1280 | { | |
773fbdb9 | 1281 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1282 | Fset_buffer (tem); |
1283 | if (b == current_buffer) | |
1284 | return Qnil; | |
1285 | } | |
1286 | ||
77270fac GM |
1287 | /* Notice if the buffer to kill is the sole visible buffer |
1288 | when we're currently in the mini-buffer, and give up if so. */ | |
1289 | XSETBUFFER (tem, current_buffer); | |
1290 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1291 | { | |
1292 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1293 | if (EQ (buf, tem)) |
1294 | return Qnil; | |
1295 | } | |
1296 | ||
1ab256cb RM |
1297 | /* Now there is no question: we can kill the buffer. */ |
1298 | ||
1299 | #ifdef CLASH_DETECTION | |
1300 | /* Unlock this buffer's file, if it is locked. */ | |
1301 | unlock_buffer (b); | |
1302 | #endif /* CLASH_DETECTION */ | |
1303 | ||
1ab256cb | 1304 | kill_buffer_processes (buf); |
1ab256cb RM |
1305 | |
1306 | tem = Vinhibit_quit; | |
1307 | Vinhibit_quit = Qt; | |
00550f94 | 1308 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1309 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1310 | frames_discard_buffer (buf); |
1ab256cb RM |
1311 | Vinhibit_quit = tem; |
1312 | ||
9b59d6d0 | 1313 | /* Delete any auto-save file, if we saved it in this session. */ |
a7a60ce9 | 1314 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1315 | && b->auto_save_modified != 0 |
30e0071c | 1316 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified) |
1ab256cb RM |
1317 | { |
1318 | Lisp_Object tem; | |
1319 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1320 | if (! NILP (tem)) |
cbb6a418 | 1321 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1322 | } |
1323 | ||
4a4a9db5 KH |
1324 | if (b->base_buffer) |
1325 | { | |
1326 | /* Unchain all markers that belong to this indirect buffer. | |
1327 | Don't unchain the markers that belong to the base buffer | |
1328 | or its other indirect buffers. */ | |
1329 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1330 | { | |
1331 | Lisp_Object next; | |
1332 | m = XMARKER (tem); | |
1333 | next = m->chain; | |
1334 | if (m->buffer == b) | |
1335 | unchain_marker (tem); | |
1336 | tem = next; | |
1337 | } | |
1338 | } | |
1339 | else | |
1ab256cb | 1340 | { |
4a4a9db5 | 1341 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1342 | and leave them pointing nowhere. */ |
4a4a9db5 | 1343 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1344 | { |
1345 | m = XMARKER (tem); | |
1346 | m->buffer = 0; | |
1347 | tem = m->chain; | |
1348 | m->chain = Qnil; | |
1349 | } | |
1350 | BUF_MARKERS (b) = Qnil; | |
336cd056 | 1351 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1352 | |
1353 | /* Perhaps we should explicitly free the interval tree here... */ | |
1354 | } | |
33f7013e | 1355 | |
2f3f993b RS |
1356 | /* Reset the local variables, so that this buffer's local values |
1357 | won't be protected from GC. They would be protected | |
1358 | if they happened to remain encached in their symbols. | |
1359 | This gets rid of them for certain. */ | |
1360 | swap_out_buffer_local_variables (b); | |
13de9290 | 1361 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1362 | |
1ab256cb | 1363 | b->name = Qnil; |
336cd056 | 1364 | |
9ac0d9e0 | 1365 | BLOCK_INPUT; |
336cd056 | 1366 | if (! b->base_buffer) |
b86af064 | 1367 | free_buffer_text (b); |
336cd056 | 1368 | |
28e969dd JB |
1369 | if (b->newline_cache) |
1370 | { | |
1371 | free_region_cache (b->newline_cache); | |
1372 | b->newline_cache = 0; | |
1373 | } | |
1374 | if (b->width_run_cache) | |
1375 | { | |
1376 | free_region_cache (b->width_run_cache); | |
1377 | b->width_run_cache = 0; | |
1378 | } | |
1379 | b->width_table = Qnil; | |
9ac0d9e0 | 1380 | UNBLOCK_INPUT; |
1ab256cb RM |
1381 | b->undo_list = Qnil; |
1382 | ||
1383 | return Qt; | |
1384 | } | |
1385 | \f | |
36a8c287 JB |
1386 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1387 | we do this each time BUF is selected visibly, the more recently | |
1388 | selected buffers are always closer to the front of the list. This | |
1389 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1390 | |
01136e9b | 1391 | void |
1ab256cb RM |
1392 | record_buffer (buf) |
1393 | Lisp_Object buf; | |
1394 | { | |
1395 | register Lisp_Object link, prev; | |
773fbdb9 | 1396 | Lisp_Object frame; |
9ba9623d | 1397 | frame = selected_frame; |
1ab256cb RM |
1398 | |
1399 | prev = Qnil; | |
7539e11f | 1400 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1401 | { |
7539e11f | 1402 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1403 | break; |
1404 | prev = link; | |
1405 | } | |
1406 | ||
36a8c287 JB |
1407 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1408 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1409 | |
265a9e55 | 1410 | if (NILP (prev)) |
7539e11f | 1411 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1412 | else |
7539e11f | 1413 | XCDR (prev) = XCDR (XCDR (prev)); |
1ab256cb | 1414 | |
7539e11f | 1415 | XCDR (link) = Vbuffer_alist; |
1ab256cb | 1416 | Vbuffer_alist = link; |
7962a441 RS |
1417 | |
1418 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1419 | ||
1420 | prev = Qnil; | |
773fbdb9 | 1421 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1422 | link = XCDR (link)) |
7962a441 | 1423 | { |
7539e11f | 1424 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1425 | break; |
1426 | prev = link; | |
1427 | } | |
1428 | ||
1429 | /* Effectively do delq. */ | |
1430 | ||
1431 | if (CONSP (link)) | |
1432 | { | |
1433 | if (NILP (prev)) | |
773fbdb9 | 1434 | set_frame_buffer_list (frame, |
7539e11f | 1435 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1436 | else |
7539e11f | 1437 | XCDR (prev) = XCDR (XCDR (prev)); |
7962a441 | 1438 | |
7539e11f | 1439 | XCDR (link) = frame_buffer_list (frame); |
773fbdb9 | 1440 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1441 | } |
1442 | else | |
773fbdb9 | 1443 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1444 | } |
1445 | ||
a9ee7a59 KH |
1446 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
1447 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ | |
1448 | Use this function before selecting the buffer, since it may need to inspect\n\ | |
1449 | the current buffer's major mode.") | |
a2428fa2 EN |
1450 | (buffer) |
1451 | Lisp_Object buffer; | |
a9ee7a59 KH |
1452 | { |
1453 | int count; | |
1454 | Lisp_Object function; | |
1455 | ||
1456 | function = buffer_defaults.major_mode; | |
1457 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1458 | function = current_buffer->major_mode; | |
1459 | ||
1460 | if (NILP (function) || EQ (function, Qfundamental_mode)) | |
1461 | return Qnil; | |
1462 | ||
1463 | count = specpdl_ptr - specpdl; | |
1464 | ||
1465 | /* To select a nonfundamental mode, | |
1466 | select the buffer temporarily and then call the mode function. */ | |
1467 | ||
1468 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1469 | ||
a2428fa2 | 1470 | Fset_buffer (buffer); |
a9ee7a59 KH |
1471 | call0 (function); |
1472 | ||
1473 | return unbind_to (count, Qnil); | |
1474 | } | |
1475 | ||
2594e0fd RS |
1476 | /* If switching buffers in WINDOW would be an error, return |
1477 | a C string saying what the error would be. */ | |
1478 | ||
1479 | char * | |
1480 | no_switch_window (window) | |
1481 | Lisp_Object window; | |
1ab256cb | 1482 | { |
1ab256cb | 1483 | Lisp_Object tem; |
2594e0fd RS |
1484 | if (EQ (minibuf_window, window)) |
1485 | return "Cannot switch buffers in minibuffer window"; | |
1486 | tem = Fwindow_dedicated_p (window); | |
265a9e55 | 1487 | if (!NILP (tem)) |
2594e0fd RS |
1488 | return "Cannot switch buffers in a dedicated window"; |
1489 | return NULL; | |
1490 | } | |
1491 | ||
1492 | /* Switch to buffer BUFFER in the selected window. | |
1493 | If NORECORD is non-nil, don't call record_buffer. */ | |
1494 | ||
1495 | Lisp_Object | |
1496 | switch_to_buffer_1 (buffer, norecord) | |
1497 | Lisp_Object buffer, norecord; | |
1498 | { | |
1499 | register Lisp_Object buf; | |
1ab256cb | 1500 | |
a25f13ae | 1501 | if (NILP (buffer)) |
773fbdb9 | 1502 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1503 | else |
a9ee7a59 | 1504 | { |
a25f13ae | 1505 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1506 | if (NILP (buf)) |
1507 | { | |
a25f13ae | 1508 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1509 | Fset_buffer_major_mode (buf); |
1510 | } | |
1511 | } | |
1ab256cb | 1512 | Fset_buffer (buf); |
265a9e55 | 1513 | if (NILP (norecord)) |
1ab256cb RM |
1514 | record_buffer (buf); |
1515 | ||
1516 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1517 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1518 | : selected_window, | |
1ab256cb RM |
1519 | buf); |
1520 | ||
cd0c235a | 1521 | return buf; |
1ab256cb RM |
1522 | } |
1523 | ||
2594e0fd RS |
1524 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
1525 | "Select buffer BUFFER in the current window.\n\ | |
1526 | BUFFER may be a buffer or a buffer name.\n\ | |
1527 | Optional second arg NORECORD non-nil means\n\ | |
1528 | do not put this buffer at the front of the list of recently selected ones.\n\ | |
1529 | \n\ | |
1530 | WARNING: This is NOT the way to work on another buffer temporarily\n\ | |
1531 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ | |
1532 | the window-buffer correspondences.") | |
1533 | (buffer, norecord) | |
1534 | Lisp_Object buffer, norecord; | |
1535 | { | |
1536 | char *err; | |
1537 | ||
1538 | err = no_switch_window (selected_window); | |
1539 | if (err) error (err); | |
1540 | ||
1541 | return switch_to_buffer_1 (buffer, norecord); | |
1542 | } | |
1543 | ||
cd0c235a | 1544 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
1ab256cb RM |
1545 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
1546 | If BUFFER is nil, then some other buffer is chosen.\n\ | |
1547 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ | |
1548 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ | |
405615e5 RS |
1549 | window even if BUFFER is already visible in the selected window.\n\ |
1550 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ | |
6d12711f RS |
1551 | of `display-buffer' for additional customization information.\n\ |
1552 | \n\ | |
1553 | Optional third arg NORECORD non-nil means\n\ | |
1554 | do not put this buffer at the front of the list of recently selected ones.") | |
1555 | (buffer, other_window, norecord) | |
1556 | Lisp_Object buffer, other_window, norecord; | |
1ab256cb RM |
1557 | { |
1558 | register Lisp_Object buf; | |
a25f13ae | 1559 | if (NILP (buffer)) |
773fbdb9 | 1560 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1561 | else |
7c2087ee | 1562 | { |
a25f13ae | 1563 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1564 | if (NILP (buf)) |
1565 | { | |
a25f13ae | 1566 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1567 | Fset_buffer_major_mode (buf); |
1568 | } | |
1569 | } | |
1ab256cb | 1570 | Fset_buffer (buf); |
6d12711f RS |
1571 | if (NILP (norecord)) |
1572 | record_buffer (buf); | |
6b17d756 | 1573 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1574 | return buf; |
1ab256cb RM |
1575 | } |
1576 | ||
1577 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
1578 | "Return the current buffer as a Lisp object.") | |
1579 | () | |
1580 | { | |
1581 | register Lisp_Object buf; | |
67180c6a | 1582 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1583 | return buf; |
1584 | } | |
1585 | \f | |
7ec44ec6 GM |
1586 | /* Set the current buffer to B. |
1587 | ||
1588 | We previously set windows_or_buffers_changed here to invalidate | |
1589 | global unchanged information in beg_unchanged and end_unchanged. | |
1590 | This is no longer necessary because we now compute unchanged | |
1591 | information on a buffer-basis. Every action affecting other | |
1592 | windows than the selected one requires a select_window at some | |
1593 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1594 | |
1595 | void | |
1596 | set_buffer_internal (b) | |
1597 | register struct buffer *b; | |
1598 | { | |
b5a225b4 | 1599 | if (current_buffer != b) |
7ec44ec6 | 1600 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1601 | } |
1602 | ||
1603 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1604 | This is used by redisplay. */ | |
1605 | ||
1606 | void | |
1607 | set_buffer_internal_1 (b) | |
1608 | register struct buffer *b; | |
1609 | { | |
1610 | register struct buffer *old_buf; | |
1611 | register Lisp_Object tail, valcontents; | |
1612 | Lisp_Object tem; | |
1613 | ||
b86af064 | 1614 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1615 | if (b->text->beg == NULL) |
b86af064 GM |
1616 | enlarge_buffer_text (b, 0); |
1617 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
684b01ee | 1618 | |
c7aa5005 KH |
1619 | if (current_buffer == b) |
1620 | return; | |
1621 | ||
1ab256cb RM |
1622 | old_buf = current_buffer; |
1623 | current_buffer = b; | |
1624 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1625 | ||
336cd056 RS |
1626 | if (old_buf) |
1627 | { | |
1628 | /* Put the undo list back in the base buffer, so that it appears | |
1629 | that an indirect buffer shares the undo list of its base. */ | |
1630 | if (old_buf->base_buffer) | |
1631 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1632 | ||
1633 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1634 | when it is not current, update them now. */ | |
1635 | if (! NILP (old_buf->pt_marker)) | |
1636 | { | |
1637 | Lisp_Object obuf; | |
1638 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1639 | set_marker_both (old_buf->pt_marker, obuf, |
1640 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1641 | } |
1642 | if (! NILP (old_buf->begv_marker)) | |
1643 | { | |
1644 | Lisp_Object obuf; | |
1645 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1646 | set_marker_both (old_buf->begv_marker, obuf, |
1647 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1648 | } |
1649 | if (! NILP (old_buf->zv_marker)) | |
1650 | { | |
1651 | Lisp_Object obuf; | |
1652 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1653 | set_marker_both (old_buf->zv_marker, obuf, |
1654 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1655 | } |
1656 | } | |
1657 | ||
1658 | /* Get the undo list from the base buffer, so that it appears | |
1659 | that an indirect buffer shares the undo list of its base. */ | |
1660 | if (b->base_buffer) | |
1661 | b->undo_list = b->base_buffer->undo_list; | |
1662 | ||
1663 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1664 | when it is not current, fetch them now. */ | |
1665 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1666 | { |
1667 | BUF_PT (b) = marker_position (b->pt_marker); | |
1668 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1669 | } | |
336cd056 | 1670 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1671 | { |
1672 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1673 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1674 | } | |
336cd056 | 1675 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1676 | { |
1677 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1678 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1679 | } | |
336cd056 | 1680 | |
1ab256cb RM |
1681 | /* Look down buffer's list of local Lisp variables |
1682 | to find and update any that forward into C variables. */ | |
1683 | ||
7539e11f | 1684 | for (tail = b->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1685 | { |
7539e11f | 1686 | valcontents = XSYMBOL (XCAR (XCAR (tail)))->value; |
a7a60ce9 KH |
1687 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1688 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1689 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1690 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1691 | /* Just reference the variable |
1692 | to cause it to become set for this buffer. */ | |
7539e11f | 1693 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1694 | } |
1695 | ||
1696 | /* Do the same with any others that were local to the previous buffer */ | |
1697 | ||
1698 | if (old_buf) | |
7539e11f | 1699 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1700 | { |
7539e11f | 1701 | valcontents = XSYMBOL (XCAR (XCAR (tail)))->value; |
a7a60ce9 KH |
1702 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1703 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1704 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1705 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1706 | /* Just reference the variable |
1707 | to cause it to become set for this buffer. */ | |
7539e11f | 1708 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1709 | } |
1710 | } | |
1711 | ||
336cd056 | 1712 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1713 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1714 | |
1715 | void | |
1716 | set_buffer_temp (b) | |
1717 | struct buffer *b; | |
1718 | { | |
1719 | register struct buffer *old_buf; | |
1720 | ||
1721 | if (current_buffer == b) | |
1722 | return; | |
1723 | ||
1724 | old_buf = current_buffer; | |
1725 | current_buffer = b; | |
1726 | ||
1727 | if (old_buf) | |
1728 | { | |
1729 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1730 | when it is not current, update them now. */ | |
1731 | if (! NILP (old_buf->pt_marker)) | |
1732 | { | |
1733 | Lisp_Object obuf; | |
1734 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1735 | set_marker_both (old_buf->pt_marker, obuf, |
1736 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1737 | } |
1738 | if (! NILP (old_buf->begv_marker)) | |
1739 | { | |
1740 | Lisp_Object obuf; | |
1741 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1742 | set_marker_both (old_buf->begv_marker, obuf, |
1743 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1744 | } |
1745 | if (! NILP (old_buf->zv_marker)) | |
1746 | { | |
1747 | Lisp_Object obuf; | |
1748 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1749 | set_marker_both (old_buf->zv_marker, obuf, |
1750 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1751 | } |
1752 | } | |
1753 | ||
1754 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1755 | when it is not current, fetch them now. */ | |
1756 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1757 | { |
1758 | BUF_PT (b) = marker_position (b->pt_marker); | |
1759 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1760 | } | |
336cd056 | 1761 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1762 | { |
1763 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1764 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1765 | } | |
336cd056 | 1766 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1767 | { |
1768 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1769 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1770 | } | |
336cd056 RS |
1771 | } |
1772 | ||
1ab256cb RM |
1773 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
1774 | "Make the buffer BUFFER current for editing operations.\n\ | |
1775 | BUFFER may be a buffer or the name of an existing buffer.\n\ | |
1776 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ | |
1777 | This function does not display the buffer, so its effect ends\n\ | |
1778 | when the current command terminates.\n\ | |
1779 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") | |
a25f13ae KH |
1780 | (buffer) |
1781 | register Lisp_Object buffer; | |
1ab256cb | 1782 | { |
a25f13ae KH |
1783 | register Lisp_Object buf; |
1784 | buf = Fget_buffer (buffer); | |
1785 | if (NILP (buf)) | |
1786 | nsberror (buffer); | |
1787 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1788 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1789 | set_buffer_internal (XBUFFER (buf)); |
1790 | return buf; | |
1ab256cb | 1791 | } |
d0628b06 RS |
1792 | |
1793 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1794 | ||
1795 | Lisp_Object | |
1796 | set_buffer_if_live (buffer) | |
1797 | Lisp_Object buffer; | |
1798 | { | |
1799 | if (! NILP (XBUFFER (buffer)->name)) | |
1800 | Fset_buffer (buffer); | |
1801 | return Qnil; | |
1802 | } | |
1ab256cb RM |
1803 | \f |
1804 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1805 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
1806 | "Signal a `buffer-read-only' error if the current buffer is read-only.") | |
1807 | () | |
1808 | { | |
a96b68f1 RS |
1809 | if (!NILP (current_buffer->read_only) |
1810 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1811 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1812 | return Qnil; | |
1813 | } | |
1814 | ||
1815 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
1816 | "Put BUFFER at the end of the list of all buffers.\n\ | |
1817 | There it is the least likely candidate for `other-buffer' to return;\n\ | |
528415e7 | 1818 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
a5611885 JB |
1819 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
1820 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ | |
1821 | selected window if it is displayed there.") | |
a2428fa2 EN |
1822 | (buffer) |
1823 | register Lisp_Object buffer; | |
1ab256cb | 1824 | { |
b271272a | 1825 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1826 | if (NILP (buffer)) |
a5611885 | 1827 | { |
a2428fa2 | 1828 | XSETBUFFER (buffer, current_buffer); |
0a63b212 RS |
1829 | |
1830 | /* If we're burying the current buffer, unshow it. */ | |
773fbdb9 | 1831 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); |
a5611885 | 1832 | } |
1ab256cb RM |
1833 | else |
1834 | { | |
1835 | Lisp_Object buf1; | |
1836 | ||
a2428fa2 | 1837 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1838 | if (NILP (buf1)) |
a2428fa2 EN |
1839 | nsberror (buffer); |
1840 | buffer = buf1; | |
b271272a JB |
1841 | } |
1842 | ||
a1a8b28e GM |
1843 | /* Move buffer to the end of the buffer list. Do nothing if the |
1844 | buffer is killed. */ | |
1845 | if (!NILP (XBUFFER (buffer)->name)) | |
1846 | { | |
1847 | Lisp_Object aelt, link; | |
b271272a | 1848 | |
a1a8b28e GM |
1849 | aelt = Frassq (buffer, Vbuffer_alist); |
1850 | link = Fmemq (aelt, Vbuffer_alist); | |
1851 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
1852 | XCDR (link) = Qnil; | |
1853 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); | |
1ab256cb | 1854 | |
a1a8b28e GM |
1855 | frames_bury_buffer (buffer); |
1856 | } | |
dec989eb | 1857 | |
1ab256cb RM |
1858 | return Qnil; |
1859 | } | |
1860 | \f | |
c922bc55 | 1861 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
1ab256cb | 1862 | "Delete the entire contents of the current buffer.\n\ |
2950a20e | 1863 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
1ab256cb RM |
1864 | so the buffer is truly empty after this.") |
1865 | () | |
1866 | { | |
1867 | Fwiden (); | |
c0d9a0c3 GM |
1868 | |
1869 | del_range (BEG, Z); | |
c280bc6a | 1870 | |
1ab256cb RM |
1871 | current_buffer->last_window_start = 1; |
1872 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1873 | if future size is less than past size. Use of erase-buffer | |
1874 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1875 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1876 | return Qnil; |
1877 | } | |
1878 | ||
01136e9b | 1879 | void |
1ab256cb RM |
1880 | validate_region (b, e) |
1881 | register Lisp_Object *b, *e; | |
1882 | { | |
1ab256cb RM |
1883 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
1884 | CHECK_NUMBER_COERCE_MARKER (*e, 1); | |
1885 | ||
1886 | if (XINT (*b) > XINT (*e)) | |
1887 | { | |
03192067 KH |
1888 | Lisp_Object tem; |
1889 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1890 | } |
1891 | ||
1892 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1893 | && XINT (*e) <= ZV)) | |
1894 | args_out_of_range (*b, *e); | |
1895 | } | |
1896 | \f | |
b05525fa RS |
1897 | /* Advance BYTE_POS up to a character boundary |
1898 | and return the adjusted position. */ | |
1899 | ||
1900 | static int | |
1901 | advance_to_char_boundary (byte_pos) | |
1902 | int byte_pos; | |
1903 | { | |
f8449323 | 1904 | int c; |
b05525fa | 1905 | |
f8449323 RS |
1906 | if (byte_pos == BEG) |
1907 | /* Beginning of buffer is always a character boundary. */ | |
1908 | return 1; | |
1909 | ||
1910 | c = FETCH_BYTE (byte_pos); | |
1911 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1912 | { |
1be6387d | 1913 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 1914 | multibyte sequence. */ |
a9bcded1 KH |
1915 | int orig_byte_pos = byte_pos; |
1916 | ||
1917 | do | |
1918 | { | |
1919 | byte_pos--; | |
1920 | c = FETCH_BYTE (byte_pos); | |
1921 | } | |
1922 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 1923 | INC_POS (byte_pos); |
a9bcded1 KH |
1924 | if (byte_pos < orig_byte_pos) |
1925 | byte_pos = orig_byte_pos; | |
f8449323 RS |
1926 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
1927 | surely advance to the correct character boundary. If C is | |
1928 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
1929 | } |
1930 | ||
20773569 | 1931 | return byte_pos; |
b05525fa RS |
1932 | } |
1933 | ||
3ac81adb RS |
1934 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
1935 | 1, 1, 0, | |
1936 | "Set the multibyte flag of the current buffer to FLAG.\n\ | |
1937 | If FLAG is t, this makes the buffer a multibyte buffer.\n\ | |
1938 | If FLAG is nil, this makes the buffer a single-byte buffer.\n\ | |
1939 | The buffer contents remain unchanged as a sequence of bytes\n\ | |
1940 | but the contents viewed as characters do change.") | |
1941 | (flag) | |
1942 | Lisp_Object flag; | |
1943 | { | |
1944 | Lisp_Object tail, markers; | |
abc9d959 | 1945 | struct buffer *other; |
a9bcded1 KH |
1946 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
1947 | int begv = BEGV, zv = ZV; | |
1948 | int narrowed = (BEG != begv || Z != zv); | |
ed00559d | 1949 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 1950 | |
6e553d5e RS |
1951 | if (current_buffer->base_buffer) |
1952 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
1953 | ||
70e77119 AS |
1954 | /* Do nothing if nothing actually changes. */ |
1955 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
1956 | return flag; | |
1957 | ||
b05525fa RS |
1958 | /* It would be better to update the list, |
1959 | but this is good enough for now. */ | |
a9bcded1 KH |
1960 | if (undo_enabled_p) |
1961 | current_buffer->undo_list = Qt; | |
b05525fa | 1962 | |
3ac81adb RS |
1963 | /* If the cached position is for this buffer, clear it out. */ |
1964 | clear_charpos_cache (current_buffer); | |
1965 | ||
a9bcded1 KH |
1966 | if (narrowed) |
1967 | Fwiden (); | |
1968 | ||
3ac81adb RS |
1969 | if (NILP (flag)) |
1970 | { | |
a9bcded1 KH |
1971 | int pos, stop; |
1972 | unsigned char *p; | |
1973 | ||
3ac81adb RS |
1974 | /* Do this first, so it can use CHAR_TO_BYTE |
1975 | to calculate the old correspondences. */ | |
1976 | set_intervals_multibyte (0); | |
1977 | ||
1978 | current_buffer->enable_multibyte_characters = Qnil; | |
1979 | ||
1980 | Z = Z_BYTE; | |
1981 | BEGV = BEGV_BYTE; | |
1982 | ZV = ZV_BYTE; | |
1983 | GPT = GPT_BYTE; | |
1984 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
1985 | ||
1986 | tail = BUF_MARKERS (current_buffer); | |
8801a864 | 1987 | while (! NILP (tail)) |
3ac81adb RS |
1988 | { |
1989 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
1990 | tail = XMARKER (tail)->chain; | |
1991 | } | |
a9bcded1 KH |
1992 | |
1993 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
1994 | pos = BEG; | |
1995 | stop = GPT; | |
1996 | p = BEG_ADDR; | |
1997 | while (1) | |
1998 | { | |
1999 | int c, bytes; | |
2000 | ||
2001 | if (pos == stop) | |
2002 | { | |
2003 | if (pos == Z) | |
2004 | break; | |
2005 | p = GAP_END_ADDR; | |
2006 | stop = Z; | |
2007 | } | |
2008 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2009 | p += bytes, pos += bytes; | |
2010 | else | |
2011 | { | |
2012 | c = STRING_CHAR (p, stop - pos); | |
2013 | /* Delete all bytes for this 8-bit character but the | |
2014 | last one, and change the last one to the charcter | |
2015 | code. */ | |
2016 | bytes--; | |
2017 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2018 | p = GAP_END_ADDR; | |
2019 | *p++ = c; | |
2020 | pos++; | |
2021 | if (begv > pos) | |
2022 | begv -= bytes; | |
2023 | if (zv > pos) | |
2024 | zv -= bytes; | |
2025 | stop = Z; | |
2026 | } | |
2027 | } | |
2028 | if (narrowed) | |
2029 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2030 | } |
2031 | else | |
2032 | { | |
a9bcded1 KH |
2033 | int pt = PT; |
2034 | int pos, stop; | |
2035 | unsigned char *p; | |
2036 | ||
673c57d2 | 2037 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2038 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2039 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2040 | |
2041 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2042 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2043 | { | |
2044 | unsigned char *p = GPT_ADDR - 1; | |
2045 | ||
2046 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2047 | if (BASE_LEADING_CODE_P (*p)) | |
2048 | { | |
2049 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2050 | ||
2051 | move_gap_both (new_gpt, new_gpt); | |
2052 | } | |
2053 | } | |
2054 | ||
a9bcded1 KH |
2055 | /* Make the buffer contents valid as multibyte by converting |
2056 | 8-bit characters to multibyte form. */ | |
2057 | pos = BEG; | |
2058 | stop = GPT; | |
2059 | p = BEG_ADDR; | |
2060 | while (1) | |
2061 | { | |
2062 | int bytes; | |
2063 | ||
2064 | if (pos == stop) | |
2065 | { | |
2066 | if (pos == Z) | |
2067 | break; | |
2068 | p = GAP_END_ADDR; | |
2069 | stop = Z; | |
2070 | } | |
2071 | ||
2072 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) | |
2073 | p += bytes, pos += bytes; | |
2074 | else | |
2075 | { | |
2076 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2077 | ||
2078 | bytes = CHAR_STRING (*p, tmp); | |
2079 | *p = tmp[0]; | |
2080 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2081 | bytes--; | |
2082 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2083 | /* Now the gap is after the just inserted data. */ | |
2084 | pos = GPT; | |
2085 | p = GAP_END_ADDR; | |
2086 | if (pos <= begv) | |
2087 | begv += bytes; | |
2088 | if (pos <= zv) | |
2089 | zv += bytes; | |
2090 | if (pos <= pt) | |
2091 | pt += bytes; | |
2092 | stop = Z; | |
2093 | } | |
2094 | } | |
2095 | ||
2096 | if (pt != PT) | |
2097 | TEMP_SET_PT (pt); | |
2098 | ||
2099 | if (narrowed) | |
2100 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2101 | ||
3ac81adb RS |
2102 | /* Do this first, so that chars_in_text asks the right question. |
2103 | set_intervals_multibyte needs it too. */ | |
2104 | current_buffer->enable_multibyte_characters = Qt; | |
2105 | ||
b05525fa | 2106 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2107 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2108 | |
673c57d2 | 2109 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2110 | |
2111 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2112 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2113 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2114 | else |
2115 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2116 | |
2117 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2118 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2119 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2120 | else |
2121 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2122 | |
2123 | { | |
2124 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2125 | int pt; | |
2126 | ||
2127 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2128 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2129 | else |
2130 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2131 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2132 | } | |
3ac81adb RS |
2133 | |
2134 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2135 | |
2136 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2137 | getting confused by the markers that have not yet been updated. | |
2138 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
2139 | BUF_MARKERS (current_buffer) = Qnil; |
2140 | ||
8801a864 | 2141 | while (! NILP (tail)) |
3ac81adb | 2142 | { |
b05525fa RS |
2143 | XMARKER (tail)->bytepos |
2144 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 2145 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 2146 | |
3ac81adb RS |
2147 | tail = XMARKER (tail)->chain; |
2148 | } | |
b69f9797 RS |
2149 | |
2150 | /* Make sure no markers were put on the chain | |
2151 | while the chain value was incorrect. */ | |
2152 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
2153 | abort (); | |
2154 | ||
3ac81adb RS |
2155 | BUF_MARKERS (current_buffer) = markers; |
2156 | ||
2157 | /* Do this last, so it can calculate the new correspondences | |
2158 | between chars and bytes. */ | |
2159 | set_intervals_multibyte (1); | |
2160 | } | |
2161 | ||
a9bcded1 KH |
2162 | if (undo_enabled_p) |
2163 | current_buffer->undo_list = Qnil; | |
2164 | ||
724b203f GM |
2165 | /* Changing the multibyteness of a buffer means that all windows |
2166 | showing that buffer must be updated thoroughly. */ | |
2167 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2168 | ++windows_or_buffers_changed; | |
2169 | ||
abc9d959 RS |
2170 | /* Copy this buffer's new multibyte status |
2171 | into all of its indirect buffers. */ | |
2172 | for (other = all_buffers; other; other = other->next) | |
2173 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2174 | { |
2175 | other->enable_multibyte_characters | |
2176 | = current_buffer->enable_multibyte_characters; | |
2177 | other->prevent_redisplay_optimizations_p = 1; | |
2178 | } | |
abc9d959 | 2179 | |
ed00559d KH |
2180 | /* Restore the modifiedness of the buffer. */ |
2181 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2182 | Fset_buffer_modified_p (Qnil); | |
2183 | ||
3ac81adb RS |
2184 | return flag; |
2185 | } | |
2186 | \f | |
1ab256cb RM |
2187 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
2188 | 0, 0, 0, | |
2189 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ | |
2190 | Most local variable bindings are eliminated so that the default values\n\ | |
2191 | become effective once more. Also, the syntax table is set from\n\ | |
2192 | `standard-syntax-table', the local keymap is set to nil,\n\ | |
2193 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ | |
2194 | This function also forces redisplay of the mode line.\n\ | |
2195 | \n\ | |
2196 | Every function to select a new major mode starts by\n\ | |
2197 | calling this function.\n\n\ | |
2198 | As a special exception, local variables whose names have\n\ | |
c5a15222 RS |
2199 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
2200 | \n\ | |
2201 | The first thing this function does is run\n\ | |
2202 | the normal hook `change-major-mode-hook'.") | |
1ab256cb RM |
2203 | () |
2204 | { | |
2205 | register Lisp_Object alist, sym, tem; | |
2206 | Lisp_Object oalist; | |
7410477a | 2207 | |
fd186f07 RS |
2208 | if (!NILP (Vrun_hooks)) |
2209 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2210 | oalist = current_buffer->local_var_alist; |
2211 | ||
2f3f993b RS |
2212 | /* Make sure none of the bindings in oalist |
2213 | remain swapped in, in their symbols. */ | |
1ab256cb | 2214 | |
2f3f993b | 2215 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2216 | |
2217 | /* Actually eliminate all local bindings of this buffer. */ | |
2218 | ||
13de9290 | 2219 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb RM |
2220 | |
2221 | /* Redisplay mode lines; we are changing major mode. */ | |
2222 | ||
2223 | update_mode_lines++; | |
2224 | ||
2225 | /* Any which are supposed to be permanent, | |
2226 | make local again, with the same values they had. */ | |
2227 | ||
7539e11f | 2228 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2229 | { |
7539e11f | 2230 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2231 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2232 | if (! NILP (tem)) |
01050cb5 RM |
2233 | { |
2234 | Fmake_local_variable (sym); | |
7539e11f | 2235 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2236 | } |
1ab256cb RM |
2237 | } |
2238 | ||
2239 | /* Force mode-line redisplay. Useful here because all major mode | |
2240 | commands call this function. */ | |
2241 | update_mode_lines++; | |
2242 | ||
2243 | return Qnil; | |
2244 | } | |
2f3f993b RS |
2245 | |
2246 | /* Make sure no local variables remain set up with buffer B | |
2247 | for their current values. */ | |
2248 | ||
2249 | static void | |
2250 | swap_out_buffer_local_variables (b) | |
2251 | struct buffer *b; | |
2252 | { | |
2253 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2254 | ||
2255 | XSETBUFFER (buffer, b); | |
2256 | oalist = b->local_var_alist; | |
2257 | ||
7539e11f | 2258 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2259 | { |
7539e11f | 2260 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2261 | |
2262 | /* Need not do anything if some other buffer's binding is now encached. */ | |
3d871c85 | 2263 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer; |
8801a864 | 2264 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2265 | { |
2266 | /* Symbol is set up for this buffer's old local value. | |
2267 | Set it up for the current buffer with the default value. */ | |
2268 | ||
3d871c85 | 2269 | tem = XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr; |
2f3f993b RS |
2270 | /* Store the symbol's current value into the alist entry |
2271 | it is currently set up for. This is so that, if the | |
2272 | local is marked permanent, and we make it local again | |
2273 | later in Fkill_all_local_variables, we don't lose the value. */ | |
7539e11f | 2274 | XCDR (XCAR (tem)) |
3d871c85 | 2275 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue); |
2f3f993b | 2276 | /* Switch to the symbol's default-value alist entry. */ |
7539e11f | 2277 | XCAR (tem) = tem; |
2f3f993b | 2278 | /* Mark it as current for buffer B. */ |
3d871c85 | 2279 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->buffer = buffer; |
2f3f993b | 2280 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 RS |
2281 | store_symval_forwarding (sym, |
2282 | XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->realvalue, | |
9b3a7dad | 2283 | XCDR (tem), NULL); |
2f3f993b RS |
2284 | } |
2285 | } | |
2286 | } | |
1ab256cb | 2287 | \f |
2eec3b4e RS |
2288 | /* Find all the overlays in the current buffer that contain position POS. |
2289 | Return the number found, and store them in a vector in *VEC_PTR. | |
2290 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
2291 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2292 | or ZV if there are no more overlays. | |
bbbe9545 | 2293 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2294 | or where an overlay starts which ends at or after POS; |
2295 | or BEGV if there are no such overlays. | |
239c932b | 2296 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2297 | |
2298 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2299 | when this function is called. |
2300 | ||
2301 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2302 | If EXTEND is zero, we never extend the vector, | |
2303 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2304 | But we still return the total number of overlays. |
2305 | ||
2306 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2307 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2308 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2309 | |
2310 | int | |
ac869cf7 | 2311 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
2eec3b4e | 2312 | int pos; |
61d54cd5 | 2313 | int extend; |
2eec3b4e RS |
2314 | Lisp_Object **vec_ptr; |
2315 | int *len_ptr; | |
2316 | int *next_ptr; | |
239c932b | 2317 | int *prev_ptr; |
ac869cf7 | 2318 | int change_req; |
1ab256cb | 2319 | { |
6af718a4 | 2320 | Lisp_Object tail, overlay, start, end; |
2eec3b4e RS |
2321 | int idx = 0; |
2322 | int len = *len_ptr; | |
2323 | Lisp_Object *vec = *vec_ptr; | |
2324 | int next = ZV; | |
239c932b | 2325 | int prev = BEGV; |
61d54cd5 RS |
2326 | int inhibit_storing = 0; |
2327 | ||
2eec3b4e | 2328 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2329 | GC_CONSP (tail); |
7539e11f | 2330 | tail = XCDR (tail)) |
2eec3b4e | 2331 | { |
239c932b | 2332 | int startpos, endpos; |
52f8ec73 | 2333 | |
7539e11f | 2334 | overlay = XCAR (tail); |
1ab256cb | 2335 | |
2eec3b4e RS |
2336 | start = OVERLAY_START (overlay); |
2337 | end = OVERLAY_END (overlay); | |
239c932b RS |
2338 | endpos = OVERLAY_POSITION (end); |
2339 | if (endpos < pos) | |
2340 | { | |
2341 | if (prev < endpos) | |
2342 | prev = endpos; | |
2343 | break; | |
2344 | } | |
413e06a4 RS |
2345 | startpos = OVERLAY_POSITION (start); |
2346 | /* This one ends at or after POS | |
daa1c109 | 2347 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2348 | if (prev < startpos && startpos < pos) |
2349 | prev = startpos; | |
239c932b RS |
2350 | if (endpos == pos) |
2351 | continue; | |
2eec3b4e RS |
2352 | if (startpos <= pos) |
2353 | { | |
2354 | if (idx == len) | |
2355 | { | |
61d54cd5 RS |
2356 | /* The supplied vector is full. |
2357 | Either make it bigger, or don't store any more in it. */ | |
2358 | if (extend) | |
2359 | { | |
0552666b GM |
2360 | /* Make it work with an initial len == 0. */ |
2361 | len *= 2; | |
2362 | if (len == 0) | |
2363 | len = 4; | |
2364 | *len_ptr = len; | |
61d54cd5 RS |
2365 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2366 | *vec_ptr = vec; | |
2367 | } | |
2368 | else | |
2369 | inhibit_storing = 1; | |
2eec3b4e | 2370 | } |
61d54cd5 RS |
2371 | |
2372 | if (!inhibit_storing) | |
2373 | vec[idx] = overlay; | |
2374 | /* Keep counting overlays even if we can't return them all. */ | |
2375 | idx++; | |
2eec3b4e RS |
2376 | } |
2377 | else if (startpos < next) | |
2378 | next = startpos; | |
2379 | } | |
2380 | ||
2381 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2382 | GC_CONSP (tail); |
7539e11f | 2383 | tail = XCDR (tail)) |
1ab256cb | 2384 | { |
239c932b | 2385 | int startpos, endpos; |
52f8ec73 | 2386 | |
7539e11f | 2387 | overlay = XCAR (tail); |
2eec3b4e RS |
2388 | |
2389 | start = OVERLAY_START (overlay); | |
2390 | end = OVERLAY_END (overlay); | |
2391 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2392 | if (pos < startpos) |
2eec3b4e RS |
2393 | { |
2394 | if (startpos < next) | |
2395 | next = startpos; | |
2396 | break; | |
2397 | } | |
239c932b RS |
2398 | endpos = OVERLAY_POSITION (end); |
2399 | if (pos < endpos) | |
2eec3b4e RS |
2400 | { |
2401 | if (idx == len) | |
2402 | { | |
61d54cd5 RS |
2403 | if (extend) |
2404 | { | |
2405 | *len_ptr = len *= 2; | |
0552666b GM |
2406 | if (len == 0) |
2407 | len = *len_ptr = 4; | |
61d54cd5 RS |
2408 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2409 | *vec_ptr = vec; | |
2410 | } | |
2411 | else | |
2412 | inhibit_storing = 1; | |
2eec3b4e | 2413 | } |
61d54cd5 RS |
2414 | |
2415 | if (!inhibit_storing) | |
2416 | vec[idx] = overlay; | |
2417 | idx++; | |
413e06a4 RS |
2418 | |
2419 | if (startpos < pos && startpos > prev) | |
2420 | prev = startpos; | |
2eec3b4e | 2421 | } |
239c932b RS |
2422 | else if (endpos < pos && endpos > prev) |
2423 | prev = endpos; | |
1d5f4c1d MB |
2424 | else if (endpos == pos && startpos > prev |
2425 | && (!change_req || startpos < pos)) | |
413e06a4 | 2426 | prev = startpos; |
1ab256cb RM |
2427 | } |
2428 | ||
239c932b RS |
2429 | if (next_ptr) |
2430 | *next_ptr = next; | |
2431 | if (prev_ptr) | |
2432 | *prev_ptr = prev; | |
2eec3b4e RS |
2433 | return idx; |
2434 | } | |
74514898 RS |
2435 | \f |
2436 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2437 | or are empty at BEG. |
2438 | ||
74514898 RS |
2439 | Return the number found, and store them in a vector in *VEC_PTR. |
2440 | Store in *LEN_PTR the size allocated for the vector. | |
2441 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2442 | or ZV if there are no more overlays. | |
2443 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2444 | or BEGV if there are no previous overlays. | |
2445 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2446 | ||
2447 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2448 | when this function is called. | |
2449 | ||
2450 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2451 | If EXTEND is zero, we never extend the vector, | |
2452 | and we store only as many overlays as will fit. | |
2453 | But we still return the total number of overlays. */ | |
2454 | ||
2455 | int | |
2456 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2457 | int beg, end; | |
2458 | int extend; | |
2459 | Lisp_Object **vec_ptr; | |
2460 | int *len_ptr; | |
2461 | int *next_ptr; | |
2462 | int *prev_ptr; | |
2463 | { | |
6af718a4 | 2464 | Lisp_Object tail, overlay, ostart, oend; |
74514898 RS |
2465 | int idx = 0; |
2466 | int len = *len_ptr; | |
2467 | Lisp_Object *vec = *vec_ptr; | |
2468 | int next = ZV; | |
2469 | int prev = BEGV; | |
2470 | int inhibit_storing = 0; | |
2471 | ||
2472 | for (tail = current_buffer->overlays_before; | |
2473 | GC_CONSP (tail); | |
7539e11f | 2474 | tail = XCDR (tail)) |
74514898 RS |
2475 | { |
2476 | int startpos, endpos; | |
2477 | ||
7539e11f | 2478 | overlay = XCAR (tail); |
74514898 RS |
2479 | |
2480 | ostart = OVERLAY_START (overlay); | |
2481 | oend = OVERLAY_END (overlay); | |
2482 | endpos = OVERLAY_POSITION (oend); | |
2483 | if (endpos < beg) | |
2484 | { | |
2485 | if (prev < endpos) | |
2486 | prev = endpos; | |
2487 | break; | |
2488 | } | |
2489 | startpos = OVERLAY_POSITION (ostart); | |
2490 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2491 | or is empty at the start of the range. */ |
74514898 | 2492 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2493 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2494 | { |
2495 | if (idx == len) | |
2496 | { | |
2497 | /* The supplied vector is full. | |
2498 | Either make it bigger, or don't store any more in it. */ | |
2499 | if (extend) | |
2500 | { | |
2501 | *len_ptr = len *= 2; | |
2502 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2503 | *vec_ptr = vec; | |
2504 | } | |
2505 | else | |
2506 | inhibit_storing = 1; | |
2507 | } | |
2508 | ||
2509 | if (!inhibit_storing) | |
2510 | vec[idx] = overlay; | |
2511 | /* Keep counting overlays even if we can't return them all. */ | |
2512 | idx++; | |
2513 | } | |
2514 | else if (startpos < next) | |
2515 | next = startpos; | |
2516 | } | |
2517 | ||
2518 | for (tail = current_buffer->overlays_after; | |
2519 | GC_CONSP (tail); | |
7539e11f | 2520 | tail = XCDR (tail)) |
74514898 RS |
2521 | { |
2522 | int startpos, endpos; | |
2523 | ||
7539e11f | 2524 | overlay = XCAR (tail); |
74514898 RS |
2525 | |
2526 | ostart = OVERLAY_START (overlay); | |
2527 | oend = OVERLAY_END (overlay); | |
2528 | startpos = OVERLAY_POSITION (ostart); | |
2529 | if (end < startpos) | |
2530 | { | |
2531 | if (startpos < next) | |
2532 | next = startpos; | |
2533 | break; | |
2534 | } | |
2535 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2536 | /* Count an interval if it either overlaps the range |
2537 | or is empty at the start of the range. */ | |
74514898 | 2538 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2539 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2540 | { |
2541 | if (idx == len) | |
2542 | { | |
2543 | if (extend) | |
2544 | { | |
2545 | *len_ptr = len *= 2; | |
2546 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); | |
2547 | *vec_ptr = vec; | |
2548 | } | |
2549 | else | |
2550 | inhibit_storing = 1; | |
2551 | } | |
2552 | ||
2553 | if (!inhibit_storing) | |
2554 | vec[idx] = overlay; | |
2555 | idx++; | |
2556 | } | |
2557 | else if (endpos < beg && endpos > prev) | |
2558 | prev = endpos; | |
2559 | } | |
fc04fa47 | 2560 | |
74514898 RS |
2561 | if (next_ptr) |
2562 | *next_ptr = next; | |
2563 | if (prev_ptr) | |
2564 | *prev_ptr = prev; | |
2565 | return idx; | |
2566 | } | |
09a22085 GM |
2567 | |
2568 | ||
2569 | /* Return non-zero if there exists an overlay with a non-nil | |
2570 | `mouse-face' property overlapping OVERLAY. */ | |
2571 | ||
2572 | int | |
2573 | mouse_face_overlay_overlaps (overlay) | |
2574 | Lisp_Object overlay; | |
2575 | { | |
2576 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2577 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2578 | int n, i, size; |
09a22085 GM |
2579 | Lisp_Object *v, tem; |
2580 | ||
bfd8410f GM |
2581 | size = 10; |
2582 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2583 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2584 | if (n > size) | |
09a22085 | 2585 | { |
09a22085 GM |
2586 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2587 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2588 | } | |
2589 | ||
2590 | for (i = 0; i < n; ++i) | |
2591 | if (!EQ (v[i], overlay) | |
2592 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2593 | !NILP (tem))) | |
2594 | break; | |
2595 | ||
2596 | return i < n; | |
2597 | } | |
2598 | ||
2599 | ||
74514898 | 2600 | \f |
fc04fa47 KH |
2601 | /* Fast function to just test if we're at an overlay boundary. */ |
2602 | int | |
2603 | overlay_touches_p (pos) | |
2604 | int pos; | |
2605 | { | |
2606 | Lisp_Object tail, overlay; | |
2607 | ||
2608 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
7539e11f | 2609 | tail = XCDR (tail)) |
fc04fa47 KH |
2610 | { |
2611 | int endpos; | |
2612 | ||
7539e11f | 2613 | overlay = XCAR (tail); |
fc04fa47 KH |
2614 | if (!GC_OVERLAYP (overlay)) |
2615 | abort (); | |
2616 | ||
2617 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2618 | if (endpos < pos) | |
2619 | break; | |
2620 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2621 | return 1; | |
2622 | } | |
2623 | ||
2624 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
7539e11f | 2625 | tail = XCDR (tail)) |
fc04fa47 KH |
2626 | { |
2627 | int startpos; | |
2628 | ||
7539e11f | 2629 | overlay = XCAR (tail); |
fc04fa47 KH |
2630 | if (!GC_OVERLAYP (overlay)) |
2631 | abort (); | |
2632 | ||
2633 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2634 | if (pos < startpos) | |
2635 | break; | |
2636 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2637 | return 1; | |
2638 | } | |
2639 | return 0; | |
2640 | } | |
2eec3b4e | 2641 | \f |
5985d248 KH |
2642 | struct sortvec |
2643 | { | |
2644 | Lisp_Object overlay; | |
2645 | int beg, end; | |
2646 | int priority; | |
2647 | }; | |
2648 | ||
2649 | static int | |
dfcf069d AS |
2650 | compare_overlays (v1, v2) |
2651 | const void *v1, *v2; | |
5985d248 | 2652 | { |
dfcf069d AS |
2653 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2654 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2655 | if (s1->priority != s2->priority) |
2656 | return s1->priority - s2->priority; | |
2657 | if (s1->beg != s2->beg) | |
2658 | return s1->beg - s2->beg; | |
2659 | if (s1->end != s2->end) | |
2660 | return s2->end - s1->end; | |
2661 | return 0; | |
2662 | } | |
2663 | ||
2664 | /* Sort an array of overlays by priority. The array is modified in place. | |
2665 | The return value is the new size; this may be smaller than the original | |
2666 | size if some of the overlays were invalid or were window-specific. */ | |
2667 | int | |
2668 | sort_overlays (overlay_vec, noverlays, w) | |
2669 | Lisp_Object *overlay_vec; | |
2670 | int noverlays; | |
2671 | struct window *w; | |
2672 | { | |
2673 | int i, j; | |
2674 | struct sortvec *sortvec; | |
2675 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2676 | ||
2677 | /* Put the valid and relevant overlays into sortvec. */ | |
2678 | ||
2679 | for (i = 0, j = 0; i < noverlays; i++) | |
2680 | { | |
0fa767e7 | 2681 | Lisp_Object tem; |
c99fc30f | 2682 | Lisp_Object overlay; |
5985d248 | 2683 | |
c99fc30f | 2684 | overlay = overlay_vec[i]; |
5985d248 KH |
2685 | if (OVERLAY_VALID (overlay) |
2686 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2687 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2688 | { | |
0fa767e7 KH |
2689 | /* If we're interested in a specific window, then ignore |
2690 | overlays that are limited to some other window. */ | |
2691 | if (w) | |
5985d248 | 2692 | { |
0fa767e7 KH |
2693 | Lisp_Object window; |
2694 | ||
2695 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2696 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2697 | continue; |
5985d248 | 2698 | } |
0fa767e7 KH |
2699 | |
2700 | /* This overlay is good and counts: put it into sortvec. */ | |
2701 | sortvec[j].overlay = overlay; | |
2702 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2703 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2704 | tem = Foverlay_get (overlay, Qpriority); | |
2705 | if (INTEGERP (tem)) | |
2706 | sortvec[j].priority = XINT (tem); | |
2707 | else | |
2708 | sortvec[j].priority = 0; | |
2709 | j++; | |
5985d248 KH |
2710 | } |
2711 | } | |
2712 | noverlays = j; | |
2713 | ||
2714 | /* Sort the overlays into the proper order: increasing priority. */ | |
2715 | ||
2716 | if (noverlays > 1) | |
2717 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2718 | ||
2719 | for (i = 0; i < noverlays; i++) | |
2720 | overlay_vec[i] = sortvec[i].overlay; | |
2721 | return (noverlays); | |
2722 | } | |
2723 | \f | |
bbbe9545 KH |
2724 | struct sortstr |
2725 | { | |
cb26008f | 2726 | Lisp_Object string, string2; |
bbbe9545 KH |
2727 | int size; |
2728 | int priority; | |
2729 | }; | |
2730 | ||
e8185fa8 KH |
2731 | struct sortstrlist |
2732 | { | |
2733 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2734 | int size; /* Allocated length of that array. */ | |
2735 | int used; /* How much of the array is currently in use. */ | |
2736 | int bytes; /* Total length of the strings in buf. */ | |
2737 | }; | |
2738 | ||
2739 | /* Buffers for storing information about the overlays touching a given | |
2740 | position. These could be automatic variables in overlay_strings, but | |
2741 | it's more efficient to hold onto the memory instead of repeatedly | |
2742 | allocating and freeing it. */ | |
2743 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2744 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2745 | |
2746 | /* Allocated length of overlay_str_buf. */ | |
2747 | static int overlay_str_len; | |
2748 | ||
bbbe9545 KH |
2749 | /* A comparison function suitable for passing to qsort. */ |
2750 | static int | |
2751 | cmp_for_strings (as1, as2) | |
2752 | char *as1, *as2; | |
2753 | { | |
2754 | struct sortstr *s1 = (struct sortstr *)as1; | |
2755 | struct sortstr *s2 = (struct sortstr *)as2; | |
2756 | if (s1->size != s2->size) | |
2757 | return s2->size - s1->size; | |
2758 | if (s1->priority != s2->priority) | |
2759 | return s1->priority - s2->priority; | |
2760 | return 0; | |
2761 | } | |
2762 | ||
e8185fa8 | 2763 | static void |
cb26008f | 2764 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2765 | struct sortstrlist *ssl; |
cb26008f | 2766 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2767 | int size; |
2768 | { | |
43d27a72 RS |
2769 | int nbytes; |
2770 | ||
e8185fa8 KH |
2771 | if (ssl->used == ssl->size) |
2772 | { | |
2773 | if (ssl->buf) | |
2774 | ssl->size *= 2; | |
2775 | else | |
2776 | ssl->size = 5; | |
2777 | ssl->buf = ((struct sortstr *) | |
2778 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2779 | } | |
2780 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2781 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2782 | ssl->buf[ssl->used].size = size; |
2783 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2784 | ssl->used++; | |
43d27a72 RS |
2785 | |
2786 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2787 | nbytes = XSTRING (str)->size; | |
2788 | else if (! STRING_MULTIBYTE (str)) | |
2789 | nbytes = count_size_as_multibyte (XSTRING (str)->data, | |
fc932ac6 | 2790 | STRING_BYTES (XSTRING (str))); |
43d27a72 | 2791 | else |
fc932ac6 | 2792 | nbytes = STRING_BYTES (XSTRING (str)); |
43d27a72 RS |
2793 | |
2794 | ssl->bytes += nbytes; | |
2795 | ||
cb26008f | 2796 | if (STRINGP (str2)) |
43d27a72 RS |
2797 | { |
2798 | if (NILP (current_buffer->enable_multibyte_characters)) | |
2799 | nbytes = XSTRING (str2)->size; | |
2800 | else if (! STRING_MULTIBYTE (str2)) | |
2801 | nbytes = count_size_as_multibyte (XSTRING (str2)->data, | |
fc932ac6 | 2802 | STRING_BYTES (XSTRING (str2))); |
43d27a72 | 2803 | else |
fc932ac6 | 2804 | nbytes = STRING_BYTES (XSTRING (str2)); |
43d27a72 RS |
2805 | |
2806 | ssl->bytes += nbytes; | |
2807 | } | |
e8185fa8 | 2808 | } |
bbbe9545 KH |
2809 | |
2810 | /* Return the concatenation of the strings associated with overlays that | |
2811 | begin or end at POS, ignoring overlays that are specific to a window | |
2812 | other than W. The strings are concatenated in the appropriate order: | |
2813 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2814 | lower. Normally all of the after-strings come first, but zero-sized |
2815 | overlays have their after-strings ride along with the before-strings | |
2816 | because it would look strange to print them inside-out. | |
2817 | ||
2818 | Returns the string length, and stores the contents indirectly through | |
2819 | PSTR, if that variable is non-null. The string may be overwritten by | |
2820 | subsequent calls. */ | |
6b5d3b89 | 2821 | |
bbbe9545 KH |
2822 | int |
2823 | overlay_strings (pos, w, pstr) | |
2824 | int pos; | |
2825 | struct window *w; | |
6b5d3b89 | 2826 | unsigned char **pstr; |
bbbe9545 | 2827 | { |
e8185fa8 | 2828 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2829 | int startpos, endpos; |
43d27a72 | 2830 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2831 | |
e8185fa8 KH |
2832 | overlay_heads.used = overlay_heads.bytes = 0; |
2833 | overlay_tails.used = overlay_tails.bytes = 0; | |
7539e11f | 2834 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2835 | { |
7539e11f | 2836 | overlay = XCAR (ov); |
bbbe9545 KH |
2837 | if (!OVERLAYP (overlay)) |
2838 | abort (); | |
2839 | ||
2840 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2841 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2842 | if (endpos < pos) | |
2843 | break; | |
2844 | if (endpos != pos && startpos != pos) | |
2845 | continue; | |
2846 | window = Foverlay_get (overlay, Qwindow); | |
2847 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2848 | continue; | |
e8185fa8 KH |
2849 | if (startpos == pos |
2850 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2851 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2852 | (startpos == endpos |
2853 | ? Foverlay_get (overlay, Qafter_string) | |
2854 | : Qnil), | |
2855 | Foverlay_get (overlay, Qpriority), | |
2856 | endpos - startpos); | |
2857 | else if (endpos == pos | |
2858 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2859 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2860 | Foverlay_get (overlay, Qpriority), |
2861 | endpos - startpos); | |
bbbe9545 | 2862 | } |
7539e11f | 2863 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2864 | { |
7539e11f | 2865 | overlay = XCAR (ov); |
bbbe9545 KH |
2866 | if (!OVERLAYP (overlay)) |
2867 | abort (); | |
2868 | ||
2869 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2870 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2871 | if (startpos > pos) | |
2872 | break; | |
e8185fa8 KH |
2873 | if (endpos != pos && startpos != pos) |
2874 | continue; | |
2875 | window = Foverlay_get (overlay, Qwindow); | |
2876 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2877 | continue; | |
e8185fa8 KH |
2878 | if (startpos == pos |
2879 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2880 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2881 | (startpos == endpos |
2882 | ? Foverlay_get (overlay, Qafter_string) | |
2883 | : Qnil), | |
2884 | Foverlay_get (overlay, Qpriority), | |
2885 | endpos - startpos); | |
2886 | else if (endpos == pos | |
2887 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2888 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2889 | Foverlay_get (overlay, Qpriority), |
2890 | endpos - startpos); | |
bbbe9545 | 2891 | } |
e8185fa8 KH |
2892 | if (overlay_tails.used > 1) |
2893 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
2894 | cmp_for_strings); | |
2895 | if (overlay_heads.used > 1) | |
2896 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
2897 | cmp_for_strings); | |
2898 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 2899 | { |
e8185fa8 | 2900 | Lisp_Object tem; |
bbbe9545 | 2901 | int i; |
9f4d7cde | 2902 | unsigned char *p; |
e8185fa8 | 2903 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
2904 | |
2905 | if (total > overlay_str_len) | |
9f4d7cde RS |
2906 | { |
2907 | overlay_str_len = total; | |
2908 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
2909 | total); | |
2910 | } | |
bbbe9545 | 2911 | p = overlay_str_buf; |
e8185fa8 | 2912 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 2913 | { |
43d27a72 | 2914 | int nbytes; |
e8185fa8 | 2915 | tem = overlay_tails.buf[i].string; |
fc932ac6 RS |
2916 | nbytes = copy_text (XSTRING (tem)->data, p, |
2917 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2918 | STRING_MULTIBYTE (tem), multibyte); |
2919 | p += nbytes; | |
bbbe9545 | 2920 | } |
e8185fa8 | 2921 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 2922 | { |
43d27a72 | 2923 | int nbytes; |
e8185fa8 | 2924 | tem = overlay_heads.buf[i].string; |
fc932ac6 RS |
2925 | nbytes = copy_text (XSTRING (tem)->data, p, |
2926 | STRING_BYTES (XSTRING (tem)), | |
43d27a72 RS |
2927 | STRING_MULTIBYTE (tem), multibyte); |
2928 | p += nbytes; | |
cb26008f KH |
2929 | tem = overlay_heads.buf[i].string2; |
2930 | if (STRINGP (tem)) | |
2931 | { | |
43d27a72 | 2932 | nbytes = copy_text (XSTRING (tem)->data, p, |
fc932ac6 | 2933 | STRING_BYTES (XSTRING (tem)), |
43d27a72 RS |
2934 | STRING_MULTIBYTE (tem), multibyte); |
2935 | p += nbytes; | |
cb26008f | 2936 | } |
bbbe9545 | 2937 | } |
cb26008f KH |
2938 | if (p != overlay_str_buf + total) |
2939 | abort (); | |
bbbe9545 KH |
2940 | if (pstr) |
2941 | *pstr = overlay_str_buf; | |
e8185fa8 | 2942 | return total; |
bbbe9545 | 2943 | } |
e8185fa8 | 2944 | return 0; |
bbbe9545 KH |
2945 | } |
2946 | \f | |
5c4f68f1 | 2947 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 2948 | |
2eec3b4e | 2949 | void |
5c4f68f1 JB |
2950 | recenter_overlay_lists (buf, pos) |
2951 | struct buffer *buf; | |
2eec3b4e RS |
2952 | int pos; |
2953 | { | |
2954 | Lisp_Object overlay, tail, next, prev, beg, end; | |
2955 | ||
2956 | /* See if anything in overlays_before should move to overlays_after. */ | |
2957 | ||
2958 | /* We don't strictly need prev in this loop; it should always be nil. | |
2959 | But we use it for symmetry and in case that should cease to be true | |
2960 | with some future change. */ | |
2961 | prev = Qnil; | |
5c4f68f1 | 2962 | for (tail = buf->overlays_before; |
2eec3b4e RS |
2963 | CONSP (tail); |
2964 | prev = tail, tail = next) | |
1ab256cb | 2965 | { |
7539e11f KR |
2966 | next = XCDR (tail); |
2967 | overlay = XCAR (tail); | |
2eec3b4e RS |
2968 | |
2969 | /* If the overlay is not valid, get rid of it. */ | |
2970 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
2971 | #if 1 |
2972 | abort (); | |
2973 | #else | |
2eec3b4e RS |
2974 | { |
2975 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2976 | if (!NILP (prev)) | |
7539e11f | 2977 | XCDR (prev) = next; |
2eec3b4e | 2978 | else |
5c4f68f1 | 2979 | buf->overlays_before = next; |
2eec3b4e RS |
2980 | tail = prev; |
2981 | continue; | |
2982 | } | |
52f8ec73 | 2983 | #endif |
1ab256cb | 2984 | |
2eec3b4e RS |
2985 | beg = OVERLAY_START (overlay); |
2986 | end = OVERLAY_END (overlay); | |
1ab256cb | 2987 | |
2eec3b4e | 2988 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 2989 | { |
2eec3b4e RS |
2990 | /* OVERLAY needs to be moved. */ |
2991 | int where = OVERLAY_POSITION (beg); | |
2992 | Lisp_Object other, other_prev; | |
2993 | ||
2994 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2995 | if (!NILP (prev)) | |
7539e11f | 2996 | XCDR (prev) = next; |
2eec3b4e | 2997 | else |
5c4f68f1 | 2998 | buf->overlays_before = next; |
2eec3b4e RS |
2999 | |
3000 | /* Search thru overlays_after for where to put it. */ | |
3001 | other_prev = Qnil; | |
5c4f68f1 | 3002 | for (other = buf->overlays_after; |
2eec3b4e | 3003 | CONSP (other); |
7539e11f | 3004 | other_prev = other, other = XCDR (other)) |
1ab256cb | 3005 | { |
6af718a4 | 3006 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3007 | |
7539e11f | 3008 | otheroverlay = XCAR (other); |
2eec3b4e | 3009 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3010 | abort (); |
2eec3b4e RS |
3011 | |
3012 | otherbeg = OVERLAY_START (otheroverlay); | |
3013 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3014 | break; | |
1ab256cb | 3015 | } |
2eec3b4e RS |
3016 | |
3017 | /* Add TAIL to overlays_after before OTHER. */ | |
7539e11f | 3018 | XCDR (tail) = other; |
2eec3b4e | 3019 | if (!NILP (other_prev)) |
7539e11f | 3020 | XCDR (other_prev) = tail; |
1ab256cb | 3021 | else |
5c4f68f1 | 3022 | buf->overlays_after = tail; |
2eec3b4e | 3023 | tail = prev; |
1ab256cb | 3024 | } |
2eec3b4e RS |
3025 | else |
3026 | /* We've reached the things that should stay in overlays_before. | |
3027 | All the rest of overlays_before must end even earlier, | |
3028 | so stop now. */ | |
3029 | break; | |
3030 | } | |
3031 | ||
3032 | /* See if anything in overlays_after should be in overlays_before. */ | |
3033 | prev = Qnil; | |
5c4f68f1 | 3034 | for (tail = buf->overlays_after; |
2eec3b4e RS |
3035 | CONSP (tail); |
3036 | prev = tail, tail = next) | |
3037 | { | |
7539e11f KR |
3038 | next = XCDR (tail); |
3039 | overlay = XCAR (tail); | |
2eec3b4e RS |
3040 | |
3041 | /* If the overlay is not valid, get rid of it. */ | |
3042 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3043 | #if 1 |
3044 | abort (); | |
3045 | #else | |
2eec3b4e RS |
3046 | { |
3047 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3048 | if (!NILP (prev)) | |
7539e11f | 3049 | XCDR (prev) = next; |
2eec3b4e | 3050 | else |
5c4f68f1 | 3051 | buf->overlays_after = next; |
2eec3b4e RS |
3052 | tail = prev; |
3053 | continue; | |
3054 | } | |
52f8ec73 | 3055 | #endif |
2eec3b4e RS |
3056 | |
3057 | beg = OVERLAY_START (overlay); | |
3058 | end = OVERLAY_END (overlay); | |
3059 | ||
3060 | /* Stop looking, when we know that nothing further | |
3061 | can possibly end before POS. */ | |
3062 | if (OVERLAY_POSITION (beg) > pos) | |
3063 | break; | |
3064 | ||
3065 | if (OVERLAY_POSITION (end) <= pos) | |
3066 | { | |
3067 | /* OVERLAY needs to be moved. */ | |
3068 | int where = OVERLAY_POSITION (end); | |
3069 | Lisp_Object other, other_prev; | |
3070 | ||
3071 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3072 | if (!NILP (prev)) | |
7539e11f | 3073 | XCDR (prev) = next; |
2eec3b4e | 3074 | else |
5c4f68f1 | 3075 | buf->overlays_after = next; |
2eec3b4e RS |
3076 | |
3077 | /* Search thru overlays_before for where to put it. */ | |
3078 | other_prev = Qnil; | |
5c4f68f1 | 3079 | for (other = buf->overlays_before; |
2eec3b4e | 3080 | CONSP (other); |
7539e11f | 3081 | other_prev = other, other = XCDR (other)) |
2eec3b4e RS |
3082 | { |
3083 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3084 | |
7539e11f | 3085 | otheroverlay = XCAR (other); |
2eec3b4e | 3086 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3087 | abort (); |
2eec3b4e RS |
3088 | |
3089 | otherend = OVERLAY_END (otheroverlay); | |
3090 | if (OVERLAY_POSITION (otherend) <= where) | |
3091 | break; | |
3092 | } | |
3093 | ||
3094 | /* Add TAIL to overlays_before before OTHER. */ | |
7539e11f | 3095 | XCDR (tail) = other; |
2eec3b4e | 3096 | if (!NILP (other_prev)) |
7539e11f | 3097 | XCDR (other_prev) = tail; |
2eec3b4e | 3098 | else |
5c4f68f1 | 3099 | buf->overlays_before = tail; |
2eec3b4e RS |
3100 | tail = prev; |
3101 | } | |
3102 | } | |
3103 | ||
8d7a4592 | 3104 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 3105 | } |
2b1bdf65 | 3106 | |
423cdb46 KH |
3107 | void |
3108 | adjust_overlays_for_insert (pos, length) | |
3109 | int pos; | |
3110 | int length; | |
3111 | { | |
3112 | /* After an insertion, the lists are still sorted properly, | |
3113 | but we may need to update the value of the overlay center. */ | |
3114 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
3115 | XSETFASTINT (current_buffer->overlay_center, | |
3116 | XFASTINT (current_buffer->overlay_center) + length); | |
3117 | } | |
3118 | ||
3119 | void | |
3120 | adjust_overlays_for_delete (pos, length) | |
3121 | int pos; | |
3122 | int length; | |
3123 | { | |
3124 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
3125 | /* The deletion was to our right. No change needed; the before- and | |
3126 | after-lists are still consistent. */ | |
3127 | ; | |
3128 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
3129 | /* The deletion was to our left. We need to adjust the center value | |
3130 | to account for the change in position, but the lists are consistent | |
3131 | given the new value. */ | |
3132 | XSETFASTINT (current_buffer->overlay_center, | |
3133 | XFASTINT (current_buffer->overlay_center) - length); | |
3134 | else | |
3135 | /* We're right in the middle. There might be things on the after-list | |
3136 | that now belong on the before-list. Recentering will move them, | |
3137 | and also update the center point. */ | |
3138 | recenter_overlay_lists (current_buffer, pos); | |
3139 | } | |
3140 | ||
2b1bdf65 KH |
3141 | /* Fix up overlays that were garbled as a result of permuting markers |
3142 | in the range START through END. Any overlay with at least one | |
3143 | endpoint in this range will need to be unlinked from the overlay | |
3144 | list and reinserted in its proper place. | |
3145 | Such an overlay might even have negative size at this point. | |
3146 | If so, we'll reverse the endpoints. Can you think of anything | |
3147 | better to do in this situation? */ | |
3148 | void | |
3149 | fix_overlays_in_range (start, end) | |
3150 | register int start, end; | |
3151 | { | |
6af718a4 | 3152 | Lisp_Object overlay; |
2b1bdf65 KH |
3153 | Lisp_Object before_list, after_list; |
3154 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; | |
3155 | int startpos, endpos; | |
3156 | ||
3157 | /* This algorithm shifts links around instead of consing and GCing. | |
3158 | The loop invariant is that before_list (resp. after_list) is a | |
3159 | well-formed list except that its last element, the one that | |
3160 | *pbefore (resp. *pafter) points to, is still uninitialized. | |
3161 | So it's not a bug that before_list isn't initialized, although | |
3162 | it may look strange. */ | |
3163 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) | |
3164 | { | |
7539e11f | 3165 | overlay = XCAR (*ptail); |
2b1bdf65 KH |
3166 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3167 | if (endpos < start) | |
3168 | break; | |
3169 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3170 | if (endpos < end | |
3171 | || (startpos >= start && startpos < end)) | |
3172 | { | |
3173 | /* If the overlay is backwards, fix that now. */ | |
3174 | if (startpos > endpos) | |
3175 | { | |
3176 | int tem; | |
2c99f3ea RS |
3177 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3178 | Qnil); | |
3179 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3180 | Qnil); | |
2b1bdf65 KH |
3181 | tem = startpos; startpos = endpos; endpos = tem; |
3182 | } | |
3183 | /* Add it to the end of the wrong list. Later on, | |
3184 | recenter_overlay_lists will move it to the right place. */ | |
3185 | if (endpos < XINT (current_buffer->overlay_center)) | |
3186 | { | |
3187 | *pafter = *ptail; | |
7539e11f | 3188 | pafter = &XCDR (*ptail); |
2b1bdf65 KH |
3189 | } |
3190 | else | |
3191 | { | |
3192 | *pbefore = *ptail; | |
7539e11f | 3193 | pbefore = &XCDR (*ptail); |
2b1bdf65 | 3194 | } |
7539e11f | 3195 | *ptail = XCDR (*ptail); |
2b1bdf65 KH |
3196 | } |
3197 | else | |
7539e11f | 3198 | ptail = &XCDR (*ptail); |
2b1bdf65 KH |
3199 | } |
3200 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) | |
3201 | { | |
7539e11f | 3202 | overlay = XCAR (*ptail); |
2b1bdf65 KH |
3203 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3204 | if (startpos >= end) | |
3205 | break; | |
3206 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3207 | if (startpos >= start | |
3208 | || (endpos >= start && endpos < end)) | |
3209 | { | |
3210 | if (startpos > endpos) | |
3211 | { | |
3212 | int tem; | |
2c99f3ea RS |
3213 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3214 | Qnil); | |
3215 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3216 | Qnil); | |
2b1bdf65 KH |
3217 | tem = startpos; startpos = endpos; endpos = tem; |
3218 | } | |
3219 | if (endpos < XINT (current_buffer->overlay_center)) | |
3220 | { | |
3221 | *pafter = *ptail; | |
7539e11f | 3222 | pafter = &XCDR (*ptail); |
2b1bdf65 KH |
3223 | } |
3224 | else | |
3225 | { | |
3226 | *pbefore = *ptail; | |
7539e11f | 3227 | pbefore = &XCDR (*ptail); |
2b1bdf65 | 3228 | } |
7539e11f | 3229 | *ptail = XCDR (*ptail); |
2b1bdf65 KH |
3230 | } |
3231 | else | |
7539e11f | 3232 | ptail = &XCDR (*ptail); |
2b1bdf65 KH |
3233 | } |
3234 | ||
3235 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3236 | and let the recenter function make it sane again. */ | |
3237 | *pbefore = current_buffer->overlays_before; | |
3238 | current_buffer->overlays_before = before_list; | |
3239 | recenter_overlay_lists (current_buffer, | |
3240 | XINT (current_buffer->overlay_center)); | |
3241 | ||
3242 | *pafter = current_buffer->overlays_after; | |
3243 | current_buffer->overlays_after = after_list; | |
3244 | recenter_overlay_lists (current_buffer, | |
3245 | XINT (current_buffer->overlay_center)); | |
3246 | } | |
3b06f880 KH |
3247 | |
3248 | /* We have two types of overlay: the one whose ending marker is | |
3249 | after-insertion-marker (this is the usual case) and the one whose | |
3250 | ending marker is before-insertion-marker. When `overlays_before' | |
3251 | contains overlays of the latter type and the former type in this | |
3252 | order and both overlays end at inserting position, inserting a text | |
3253 | increases only the ending marker of the latter type, which results | |
3254 | in incorrect ordering of `overlays_before'. | |
3255 | ||
3256 | This function fixes ordering of overlays in the slot | |
3257 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3258 | was at PREV, and now is at POS. */ | |
3259 | ||
01136e9b | 3260 | void |
3b06f880 KH |
3261 | fix_overlays_before (bp, prev, pos) |
3262 | struct buffer *bp; | |
3263 | int prev, pos; | |
3264 | { | |
3265 | Lisp_Object *tailp = &bp->overlays_before; | |
3266 | Lisp_Object *right_place; | |
3267 | int end; | |
3268 | ||
3269 | /* After the insertion, the several overlays may be in incorrect | |
3270 | order. The possibility is that, in the list `overlays_before', | |
3271 | an overlay which ends at POS appears after an overlay which ends | |
3272 | at PREV. Since POS is greater than PREV, we must fix the | |
3273 | ordering of these overlays, by moving overlays ends at POS before | |
3274 | the overlays ends at PREV. */ | |
3275 | ||
3276 | /* At first, find a place where disordered overlays should be linked | |
3277 | in. It is where an overlay which end before POS exists. (i.e. an | |
3278 | overlay whose ending marker is after-insertion-marker if disorder | |
3279 | exists). */ | |
3280 | while (!NILP (*tailp) | |
7539e11f | 3281 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp)))) |
3b06f880 | 3282 | >= pos)) |
7539e11f | 3283 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3284 | |
3285 | /* If we don't find such an overlay, | |
3286 | or the found one ends before PREV, | |
3287 | or the found one is the last one in the list, | |
3288 | we don't have to fix anything. */ | |
3289 | if (NILP (*tailp) | |
3290 | || end < prev | |
7539e11f | 3291 | || NILP (XCDR (*tailp))) |
3b06f880 KH |
3292 | return; |
3293 | ||
3294 | right_place = tailp; | |
7539e11f | 3295 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3296 | |
3297 | /* Now, end position of overlays in the list *TAILP should be before | |
3298 | or equal to PREV. In the loop, an overlay which ends at POS is | |
3299 | moved ahead to the place pointed by RIGHT_PLACE. If we found an | |
3300 | overlay which ends before PREV, the remaining overlays are in | |
3301 | correct order. */ | |
3302 | while (!NILP (*tailp)) | |
3303 | { | |
7539e11f | 3304 | end = OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp))); |
3b06f880 KH |
3305 | |
3306 | if (end == pos) | |
3307 | { /* This overlay is disordered. */ | |
3308 | Lisp_Object found = *tailp; | |
3309 | ||
3310 | /* Unlink the found overlay. */ | |
7539e11f | 3311 | *tailp = XCDR (found); |
3b06f880 | 3312 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ |
7539e11f | 3313 | XCDR (found) = *right_place; |
3b06f880 KH |
3314 | /* Link it into the right place. */ |
3315 | *right_place = found; | |
3316 | } | |
3317 | else if (end == prev) | |
7539e11f | 3318 | tailp = &XCDR (*tailp); |
3b06f880 KH |
3319 | else /* No more disordered overlay. */ |
3320 | break; | |
3321 | } | |
3322 | } | |
2eec3b4e | 3323 | \f |
52f8ec73 JB |
3324 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
3325 | "Return t if OBJECT is an overlay.") | |
3326 | (object) | |
3327 | Lisp_Object object; | |
3328 | { | |
3329 | return (OVERLAYP (object) ? Qt : Qnil); | |
3330 | } | |
3331 | ||
acac2700 | 3332 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
5c4f68f1 JB |
3333 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
3334 | If omitted, BUFFER defaults to the current buffer.\n\ | |
acac2700 RS |
3335 | BEG and END may be integers or markers.\n\ |
3336 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ | |
3337 | front delimiter advance when text is inserted there.\n\ | |
3338 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ | |
3339 | rear delimiter advance when text is inserted there.") | |
3340 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3341 | Lisp_Object beg, end, buffer; |
acac2700 | 3342 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3343 | { |
3344 | Lisp_Object overlay; | |
5c4f68f1 | 3345 | struct buffer *b; |
2eec3b4e | 3346 | |
5c4f68f1 | 3347 | if (NILP (buffer)) |
67180c6a | 3348 | XSETBUFFER (buffer, current_buffer); |
883047b9 JB |
3349 | else |
3350 | CHECK_BUFFER (buffer, 2); | |
3351 | if (MARKERP (beg) | |
3352 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3353 | error ("Marker points into wrong buffer"); | |
3354 | if (MARKERP (end) | |
3355 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3356 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3357 | |
883047b9 JB |
3358 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3359 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
5c4f68f1 | 3360 | |
883047b9 | 3361 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3362 | { |
c99fc30f KH |
3363 | Lisp_Object temp; |
3364 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3365 | } |
883047b9 JB |
3366 | |
3367 | b = XBUFFER (buffer); | |
3368 | ||
3369 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3370 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3371 | |
acac2700 RS |
3372 | if (!NILP (front_advance)) |
3373 | XMARKER (beg)->insertion_type = 1; | |
3374 | if (!NILP (rear_advance)) | |
3375 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3376 | |
48e2e3ba | 3377 | overlay = allocate_misc (); |
89ca3e1b | 3378 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3379 | XOVERLAY (overlay)->start = beg; |
3380 | XOVERLAY (overlay)->end = end; | |
3381 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3382 | |
3383 | /* Put the new overlay on the wrong list. */ | |
3384 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3385 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3386 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3387 | else |
5c4f68f1 | 3388 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3389 | |
3390 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3391 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3392 | |
b61982dd JB |
3393 | /* We don't need to redisplay the region covered by the overlay, because |
3394 | the overlay has no properties at the moment. */ | |
3395 | ||
2eec3b4e RS |
3396 | return overlay; |
3397 | } | |
876aa27c RS |
3398 | \f |
3399 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3400 | ||
3401 | static void | |
3402 | modify_overlay (buf, start, end) | |
3403 | struct buffer *buf; | |
3404 | int start, end; | |
3405 | { | |
876aa27c RS |
3406 | if (start > end) |
3407 | { | |
3408 | int temp = start; | |
26f545d7 GM |
3409 | start = end; |
3410 | end = temp; | |
876aa27c RS |
3411 | } |
3412 | ||
481b5054 GM |
3413 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
3414 | ||
876aa27c RS |
3415 | /* If this is a buffer not in the selected window, |
3416 | we must do other windows. */ | |
3417 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3418 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3419 | /* If multiple windows show this buffer, we must do other windows. */ |
3420 | else if (buffer_shared > 1) | |
3421 | windows_or_buffers_changed = 1; | |
876aa27c | 3422 | |
d8b9150f | 3423 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3424 | } |
2eec3b4e | 3425 | |
876aa27c | 3426 | \f\f |
2e34157c RS |
3427 | Lisp_Object Fdelete_overlay (); |
3428 | ||
5c4f68f1 JB |
3429 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
3430 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ | |
3ece337a JB |
3431 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
3432 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ | |
3433 | buffer.") | |
5c4f68f1 JB |
3434 | (overlay, beg, end, buffer) |
3435 | Lisp_Object overlay, beg, end, buffer; | |
2eec3b4e | 3436 | { |
0a4469c9 RS |
3437 | struct buffer *b, *ob; |
3438 | Lisp_Object obuffer; | |
3439 | int count = specpdl_ptr - specpdl; | |
5c4f68f1 | 3440 | |
52f8ec73 | 3441 | CHECK_OVERLAY (overlay, 0); |
5c4f68f1 JB |
3442 | if (NILP (buffer)) |
3443 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3444 | if (NILP (buffer)) |
67180c6a | 3445 | XSETBUFFER (buffer, current_buffer); |
5c4f68f1 | 3446 | CHECK_BUFFER (buffer, 3); |
883047b9 JB |
3447 | |
3448 | if (MARKERP (beg) | |
3449 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3450 | error ("Marker points into wrong buffer"); | |
3451 | if (MARKERP (end) | |
3452 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3453 | error ("Marker points into wrong buffer"); | |
3454 | ||
b61982dd JB |
3455 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
3456 | CHECK_NUMBER_COERCE_MARKER (end, 1); | |
3457 | ||
9d7608b7 KH |
3458 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3459 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3460 | |
b61982dd JB |
3461 | if (XINT (beg) > XINT (end)) |
3462 | { | |
c99fc30f KH |
3463 | Lisp_Object temp; |
3464 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3465 | } |
3466 | ||
9d7608b7 KH |
3467 | specbind (Qinhibit_quit, Qt); |
3468 | ||
0a4469c9 | 3469 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3470 | b = XBUFFER (buffer); |
8801a864 | 3471 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3472 | |
c82ed728 | 3473 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3474 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3475 | { |
3476 | /* Redisplay where the overlay was. */ | |
3477 | if (!NILP (obuffer)) | |
3478 | { | |
2e34157c RS |
3479 | int o_beg; |
3480 | int o_end; | |
50760c4a | 3481 | |
80509f2f RS |
3482 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3483 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3484 | |
2e34157c | 3485 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3486 | } |
3487 | ||
3488 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3489 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3490 | } |
c82ed728 JB |
3491 | else |
3492 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3493 | { | |
2e34157c | 3494 | int o_beg, o_end; |
c82ed728 | 3495 | |
80509f2f RS |
3496 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3497 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3498 | |
2e34157c RS |
3499 | if (o_beg == XINT (beg)) |
3500 | modify_overlay (b, o_end, XINT (end)); | |
3501 | else if (o_end == XINT (end)) | |
3502 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3503 | else |
3504 | { | |
2e34157c RS |
3505 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3506 | if (XINT (end) > o_end) o_end = XINT (end); | |
3507 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3508 | } |
3509 | } | |
b61982dd | 3510 | |
0a4469c9 RS |
3511 | if (!NILP (obuffer)) |
3512 | { | |
3513 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3514 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3515 | } | |
5c4f68f1 JB |
3516 | |
3517 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3518 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3519 | |
3520 | /* Put the overlay on the wrong list. */ | |
3521 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3522 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3523 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3524 | else |
5c4f68f1 | 3525 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3526 | |
3527 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3528 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3529 | |
0a4469c9 | 3530 | return unbind_to (count, overlay); |
2eec3b4e RS |
3531 | } |
3532 | ||
3533 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
5c4f68f1 | 3534 | "Delete the overlay OVERLAY from its buffer.") |
2eec3b4e | 3535 | (overlay) |
5c4f68f1 | 3536 | Lisp_Object overlay; |
2eec3b4e | 3537 | { |
0a4469c9 | 3538 | Lisp_Object buffer; |
5c4f68f1 | 3539 | struct buffer *b; |
0a4469c9 | 3540 | int count = specpdl_ptr - specpdl; |
5c4f68f1 | 3541 | |
52f8ec73 JB |
3542 | CHECK_OVERLAY (overlay, 0); |
3543 | ||
0a4469c9 RS |
3544 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3545 | if (NILP (buffer)) | |
3546 | return Qnil; | |
3547 | ||
3548 | b = XBUFFER (buffer); | |
0a4469c9 | 3549 | specbind (Qinhibit_quit, Qt); |
26f545d7 | 3550 | |
5c4f68f1 | 3551 | b->overlays_before = Fdelq (overlay, b->overlays_before); |
26f545d7 | 3552 | b->overlays_after = Fdelq (overlay, b->overlays_after); |
876aa27c | 3553 | modify_overlay (b, |
8231a9aa RS |
3554 | marker_position (OVERLAY_START (overlay)), |
3555 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3556 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3557 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3558 | ||
e58c389d | 3559 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3560 | display optimizations for the affected buffer, on the basis that |
3561 | these strings may contain newlines. This is easier to do than to | |
3562 | check for that situation during redisplay. */ | |
3563 | if (!windows_or_buffers_changed | |
3564 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3565 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3566 | b->prevent_redisplay_optimizations_p = 1; | |
3567 | ||
0a4469c9 | 3568 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3569 | } |
3570 | \f | |
8ebafa8d JB |
3571 | /* Overlay dissection functions. */ |
3572 | ||
3573 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
3574 | "Return the position at which OVERLAY starts.") | |
3575 | (overlay) | |
3576 | Lisp_Object overlay; | |
3577 | { | |
3578 | CHECK_OVERLAY (overlay, 0); | |
3579 | ||
3580 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3581 | } | |
3582 | ||
3583 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
3584 | "Return the position at which OVERLAY ends.") | |
3585 | (overlay) | |
3586 | Lisp_Object overlay; | |
3587 | { | |
3588 | CHECK_OVERLAY (overlay, 0); | |
3589 | ||
3590 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3591 | } | |
3592 | ||
3593 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
3594 | "Return the buffer OVERLAY belongs to.") | |
3595 | (overlay) | |
3596 | Lisp_Object overlay; | |
3597 | { | |
3598 | CHECK_OVERLAY (overlay, 0); | |
3599 | ||
3600 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3601 | } | |
3602 | ||
3603 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
3604 | "Return a list of the properties on OVERLAY.\n\ | |
3605 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ | |
3606 | OVERLAY.") | |
3607 | (overlay) | |
3608 | Lisp_Object overlay; | |
3609 | { | |
3610 | CHECK_OVERLAY (overlay, 0); | |
3611 | ||
48e2e3ba | 3612 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3613 | } |
3614 | ||
3615 | \f | |
2eec3b4e | 3616 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
eb8c3be9 | 3617 | "Return a list of the overlays that contain position POS.") |
2eec3b4e RS |
3618 | (pos) |
3619 | Lisp_Object pos; | |
3620 | { | |
3621 | int noverlays; | |
2eec3b4e RS |
3622 | Lisp_Object *overlay_vec; |
3623 | int len; | |
3624 | Lisp_Object result; | |
3625 | ||
3626 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3627 | ||
3628 | len = 10; | |
a9800ae8 | 3629 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3630 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3631 | ||
3632 | /* Put all the overlays we want in a vector in overlay_vec. | |
3633 | Store the length in len. */ | |
2a77a7d7 | 3634 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3635 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3636 | |
3637 | /* Make a list of them all. */ | |
3638 | result = Flist (noverlays, overlay_vec); | |
3639 | ||
9ac0d9e0 | 3640 | xfree (overlay_vec); |
2eec3b4e RS |
3641 | return result; |
3642 | } | |
3643 | ||
74514898 | 3644 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
2a3eeee7 RS |
3645 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
3646 | Overlap means that at least one character is contained within the overlay\n\ | |
3647 | and also contained within the specified region.\n\ | |
3648 | Empty overlays are included in the result if they are located at BEG\n\ | |
3649 | or between BEG and END.") | |
74514898 RS |
3650 | (beg, end) |
3651 | Lisp_Object beg, end; | |
3652 | { | |
3653 | int noverlays; | |
3654 | Lisp_Object *overlay_vec; | |
3655 | int len; | |
3656 | Lisp_Object result; | |
3657 | ||
3658 | CHECK_NUMBER_COERCE_MARKER (beg, 0); | |
3659 | CHECK_NUMBER_COERCE_MARKER (end, 0); | |
3660 | ||
3661 | len = 10; | |
3662 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3663 | ||
3664 | /* Put all the overlays we want in a vector in overlay_vec. | |
3665 | Store the length in len. */ | |
3666 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3667 | (int *) 0, (int *) 0); | |
3668 | ||
3669 | /* Make a list of them all. */ | |
3670 | result = Flist (noverlays, overlay_vec); | |
3671 | ||
3672 | xfree (overlay_vec); | |
3673 | return result; | |
3674 | } | |
3675 | ||
2eec3b4e RS |
3676 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
3677 | 1, 1, 0, | |
bbe20e81 KH |
3678 | "Return the next position after POS where an overlay starts or ends.\n\ |
3679 | If there are no more overlay boundaries after POS, return (point-max).") | |
2eec3b4e RS |
3680 | (pos) |
3681 | Lisp_Object pos; | |
3682 | { | |
3683 | int noverlays; | |
3684 | int endpos; | |
3685 | Lisp_Object *overlay_vec; | |
3686 | int len; | |
2eec3b4e RS |
3687 | int i; |
3688 | ||
3689 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3690 | ||
3691 | len = 10; | |
3692 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3693 | ||
3694 | /* Put all the overlays we want in a vector in overlay_vec. | |
3695 | Store the length in len. | |
3696 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3697 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3698 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3699 | |
3700 | /* If any of these overlays ends before endpos, | |
3701 | use its ending point instead. */ | |
3702 | for (i = 0; i < noverlays; i++) | |
3703 | { | |
3704 | Lisp_Object oend; | |
3705 | int oendpos; | |
3706 | ||
3707 | oend = OVERLAY_END (overlay_vec[i]); | |
3708 | oendpos = OVERLAY_POSITION (oend); | |
3709 | if (oendpos < endpos) | |
3710 | endpos = oendpos; | |
1ab256cb RM |
3711 | } |
3712 | ||
9ac0d9e0 | 3713 | xfree (overlay_vec); |
2eec3b4e RS |
3714 | return make_number (endpos); |
3715 | } | |
239c932b RS |
3716 | |
3717 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3718 | Sprevious_overlay_change, 1, 1, 0, | |
3719 | "Return the previous position before POS where an overlay starts or ends.\n\ | |
624bbdc4 | 3720 | If there are no more overlay boundaries before POS, return (point-min).") |
239c932b RS |
3721 | (pos) |
3722 | Lisp_Object pos; | |
3723 | { | |
3724 | int noverlays; | |
3725 | int prevpos; | |
3726 | Lisp_Object *overlay_vec; | |
3727 | int len; | |
239c932b RS |
3728 | |
3729 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3730 | ||
624bbdc4 RS |
3731 | /* At beginning of buffer, we know the answer; |
3732 | avoid bug subtracting 1 below. */ | |
3733 | if (XINT (pos) == BEGV) | |
3734 | return pos; | |
3735 | ||
017f0539 GM |
3736 | len = 10; |
3737 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3738 | ||
239c932b RS |
3739 | /* Put all the overlays we want in a vector in overlay_vec. |
3740 | Store the length in len. | |
daa1c109 | 3741 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 3742 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3743 | (int *) 0, &prevpos, 1); |
239c932b | 3744 | |
239c932b RS |
3745 | xfree (overlay_vec); |
3746 | return make_number (prevpos); | |
3747 | } | |
2eec3b4e RS |
3748 | \f |
3749 | /* These functions are for debugging overlays. */ | |
3750 | ||
3751 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
3752 | "Return a pair of lists giving all the overlays of the current buffer.\n\ | |
3753 | The car has all the overlays before the overlay center;\n\ | |
bbe20e81 | 3754 | the cdr has all the overlays after the overlay center.\n\ |
2eec3b4e RS |
3755 | Recentering overlays moves overlays between these lists.\n\ |
3756 | The lists you get are copies, so that changing them has no effect.\n\ | |
3757 | However, the overlays you get are the real objects that the buffer uses.") | |
3758 | () | |
3759 | { | |
3760 | Lisp_Object before, after; | |
3761 | before = current_buffer->overlays_before; | |
3762 | if (CONSP (before)) | |
3763 | before = Fcopy_sequence (before); | |
3764 | after = current_buffer->overlays_after; | |
3765 | if (CONSP (after)) | |
3766 | after = Fcopy_sequence (after); | |
3767 | ||
3768 | return Fcons (before, after); | |
3769 | } | |
3770 | ||
3771 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
3772 | "Recenter the overlays of the current buffer around position POS.") | |
3773 | (pos) | |
3774 | Lisp_Object pos; | |
3775 | { | |
3776 | CHECK_NUMBER_COERCE_MARKER (pos, 0); | |
3777 | ||
5c4f68f1 | 3778 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3779 | return Qnil; |
3780 | } | |
3781 | \f | |
3782 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
a2428fa2 | 3783 | "Get the property of overlay OVERLAY with property name PROP.") |
2eec3b4e RS |
3784 | (overlay, prop) |
3785 | Lisp_Object overlay, prop; | |
3786 | { | |
cab4777e | 3787 | Lisp_Object plist, fallback; |
52f8ec73 JB |
3788 | |
3789 | CHECK_OVERLAY (overlay, 0); | |
3790 | ||
cab4777e RS |
3791 | fallback = Qnil; |
3792 | ||
48e2e3ba | 3793 | for (plist = XOVERLAY (overlay)->plist; |
7539e11f KR |
3794 | CONSP (plist) && CONSP (XCDR (plist)); |
3795 | plist = XCDR (XCDR (plist))) | |
2eec3b4e | 3796 | { |
7539e11f KR |
3797 | if (EQ (XCAR (plist), prop)) |
3798 | return XCAR (XCDR (plist)); | |
3799 | else if (EQ (XCAR (plist), Qcategory)) | |
cab4777e RS |
3800 | { |
3801 | Lisp_Object tem; | |
3802 | tem = Fcar (Fcdr (plist)); | |
3803 | if (SYMBOLP (tem)) | |
3804 | fallback = Fget (tem, prop); | |
3805 | } | |
2eec3b4e | 3806 | } |
52f8ec73 | 3807 | |
cab4777e | 3808 | return fallback; |
2eec3b4e RS |
3809 | } |
3810 | ||
3811 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
3812 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") | |
3813 | (overlay, prop, value) | |
3814 | Lisp_Object overlay, prop, value; | |
3815 | { | |
48e2e3ba | 3816 | Lisp_Object tail, buffer; |
9d7608b7 | 3817 | int changed; |
2eec3b4e | 3818 | |
52f8ec73 | 3819 | CHECK_OVERLAY (overlay, 0); |
b61982dd | 3820 | |
274a9425 RS |
3821 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3822 | ||
48e2e3ba | 3823 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
3824 | CONSP (tail) && CONSP (XCDR (tail)); |
3825 | tail = XCDR (XCDR (tail))) | |
3826 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 3827 | { |
7539e11f KR |
3828 | changed = !EQ (XCAR (XCDR (tail)), value); |
3829 | XCAR (XCDR (tail)) = value; | |
9d7608b7 | 3830 | goto found; |
274a9425 | 3831 | } |
9d7608b7 KH |
3832 | /* It wasn't in the list, so add it to the front. */ |
3833 | changed = !NILP (value); | |
48e2e3ba KH |
3834 | XOVERLAY (overlay)->plist |
3835 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3836 | found: |
3837 | if (! NILP (buffer)) | |
3838 | { | |
3839 | if (changed) | |
876aa27c | 3840 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
3841 | marker_position (OVERLAY_START (overlay)), |
3842 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
3843 | if (EQ (prop, Qevaporate) && ! NILP (value) |
3844 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3845 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3846 | Fdelete_overlay (overlay); | |
3847 | } | |
2eec3b4e | 3848 | return value; |
1ab256cb RM |
3849 | } |
3850 | \f | |
9115729e KH |
3851 | /* Subroutine of report_overlay_modification. */ |
3852 | ||
3853 | /* Lisp vector holding overlay hook functions to call. | |
3854 | Vector elements come in pairs. | |
3855 | Each even-index element is a list of hook functions. | |
3856 | The following odd-index element is the overlay they came from. | |
3857 | ||
3858 | Before the buffer change, we fill in this vector | |
3859 | as we call overlay hook functions. | |
3860 | After the buffer change, we get the functions to call from this vector. | |
3861 | This way we always call the same functions before and after the change. */ | |
3862 | static Lisp_Object last_overlay_modification_hooks; | |
3863 | ||
3864 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
3865 | static int last_overlay_modification_hooks_used; | |
3866 | ||
3867 | /* Add one functionlist/overlay pair | |
3868 | to the end of last_overlay_modification_hooks. */ | |
3869 | ||
3870 | static void | |
3871 | add_overlay_mod_hooklist (functionlist, overlay) | |
3872 | Lisp_Object functionlist, overlay; | |
3873 | { | |
3874 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
3875 | ||
3876 | if (last_overlay_modification_hooks_used == oldsize) | |
3877 | { | |
3878 | Lisp_Object old; | |
3879 | old = last_overlay_modification_hooks; | |
3880 | last_overlay_modification_hooks | |
3881 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
3882 | bcopy (XVECTOR (old)->contents, |
3883 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
3884 | sizeof (Lisp_Object) * oldsize); |
3885 | } | |
3886 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
3887 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
3888 | } | |
3889 | \f | |
173f2a64 RS |
3890 | /* Run the modification-hooks of overlays that include |
3891 | any part of the text in START to END. | |
9115729e KH |
3892 | If this change is an insertion, also |
3893 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
3894 | and the insert-after-hooks of overlay ending at START. |
3895 | ||
3896 | This is called both before and after the modification. | |
3897 | AFTER is nonzero when we call after the modification. | |
3898 | ||
9115729e KH |
3899 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
3900 | When AFTER is nonzero, they are the start position, | |
3901 | the position after the inserted new text, | |
3902 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
3903 | |
3904 | void | |
930a9140 | 3905 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 3906 | Lisp_Object start, end; |
930a9140 RS |
3907 | int after; |
3908 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
3909 | { |
3910 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
3911 | /* 1 if this change is an insertion. */ |
3912 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 3913 | int tail_copied; |
930a9140 | 3914 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
3915 | |
3916 | overlay = Qnil; | |
3917 | tail = Qnil; | |
930a9140 | 3918 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 3919 | |
9115729e KH |
3920 | if (after) |
3921 | { | |
3922 | /* Call the functions recorded in last_overlay_modification_hooks | |
3923 | rather than scanning the overlays again. | |
3924 | First copy the vector contents, in case some of these hooks | |
3925 | do subsequent modification of the buffer. */ | |
3926 | int size = last_overlay_modification_hooks_used; | |
3927 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
3928 | int i; | |
3929 | ||
3930 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
3931 | copy, size * sizeof (Lisp_Object)); | |
3932 | gcpro1.var = copy; | |
3933 | gcpro1.nvars = size; | |
3934 | ||
3935 | for (i = 0; i < size;) | |
3936 | { | |
3937 | Lisp_Object prop, overlay; | |
3938 | prop = copy[i++]; | |
3939 | overlay = copy[i++]; | |
3940 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
3941 | } | |
3942 | UNGCPRO; | |
3943 | return; | |
3944 | } | |
3945 | ||
3946 | /* We are being called before a change. | |
3947 | Scan the overlays to find the functions to call. */ | |
3948 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 3949 | tail_copied = 0; |
173f2a64 RS |
3950 | for (tail = current_buffer->overlays_before; |
3951 | CONSP (tail); | |
7539e11f | 3952 | tail = XCDR (tail)) |
173f2a64 RS |
3953 | { |
3954 | int startpos, endpos; | |
be8b1c6b | 3955 | Lisp_Object ostart, oend; |
173f2a64 | 3956 | |
7539e11f | 3957 | overlay = XCAR (tail); |
173f2a64 RS |
3958 | |
3959 | ostart = OVERLAY_START (overlay); | |
3960 | oend = OVERLAY_END (overlay); | |
3961 | endpos = OVERLAY_POSITION (oend); | |
3962 | if (XFASTINT (start) > endpos) | |
3963 | break; | |
3964 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
3965 | if (insertion && (XFASTINT (start) == startpos |
3966 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
3967 | { |
3968 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
3969 | if (!NILP (prop)) |
3970 | { | |
3971 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
3972 | if (!tail_copied) |
3973 | tail = Fcopy_sequence (tail); | |
3974 | tail_copied = 1; | |
930a9140 | 3975 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3976 | } |
173f2a64 | 3977 | } |
9115729e KH |
3978 | if (insertion && (XFASTINT (start) == endpos |
3979 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
3980 | { |
3981 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
3982 | if (!NILP (prop)) |
3983 | { | |
55b48893 RS |
3984 | if (!tail_copied) |
3985 | tail = Fcopy_sequence (tail); | |
3986 | tail_copied = 1; | |
930a9140 | 3987 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 3988 | } |
173f2a64 | 3989 | } |
3bd13e92 KH |
3990 | /* Test for intersecting intervals. This does the right thing |
3991 | for both insertion and deletion. */ | |
3992 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
3993 | { |
3994 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
3995 | if (!NILP (prop)) |
3996 | { | |
55b48893 RS |
3997 | if (!tail_copied) |
3998 | tail = Fcopy_sequence (tail); | |
3999 | tail_copied = 1; | |
930a9140 | 4000 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4001 | } |
173f2a64 RS |
4002 | } |
4003 | } | |
4004 | ||
55b48893 | 4005 | tail_copied = 0; |
173f2a64 RS |
4006 | for (tail = current_buffer->overlays_after; |
4007 | CONSP (tail); | |
7539e11f | 4008 | tail = XCDR (tail)) |
173f2a64 RS |
4009 | { |
4010 | int startpos, endpos; | |
be8b1c6b | 4011 | Lisp_Object ostart, oend; |
173f2a64 | 4012 | |
7539e11f | 4013 | overlay = XCAR (tail); |
173f2a64 RS |
4014 | |
4015 | ostart = OVERLAY_START (overlay); | |
4016 | oend = OVERLAY_END (overlay); | |
4017 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 4018 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
4019 | if (XFASTINT (end) < startpos) |
4020 | break; | |
9115729e KH |
4021 | if (insertion && (XFASTINT (start) == startpos |
4022 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
4023 | { |
4024 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
4025 | if (!NILP (prop)) |
4026 | { | |
55b48893 RS |
4027 | if (!tail_copied) |
4028 | tail = Fcopy_sequence (tail); | |
4029 | tail_copied = 1; | |
930a9140 | 4030 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4031 | } |
173f2a64 | 4032 | } |
9115729e KH |
4033 | if (insertion && (XFASTINT (start) == endpos |
4034 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
4035 | { |
4036 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
4037 | if (!NILP (prop)) |
4038 | { | |
55b48893 RS |
4039 | if (!tail_copied) |
4040 | tail = Fcopy_sequence (tail); | |
4041 | tail_copied = 1; | |
930a9140 | 4042 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4043 | } |
173f2a64 | 4044 | } |
3bd13e92 KH |
4045 | /* Test for intersecting intervals. This does the right thing |
4046 | for both insertion and deletion. */ | |
4047 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
4048 | { |
4049 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
4050 | if (!NILP (prop)) |
4051 | { | |
55b48893 RS |
4052 | if (!tail_copied) |
4053 | tail = Fcopy_sequence (tail); | |
4054 | tail_copied = 1; | |
930a9140 | 4055 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4056 | } |
173f2a64 RS |
4057 | } |
4058 | } | |
55b48893 RS |
4059 | |
4060 | UNGCPRO; | |
173f2a64 RS |
4061 | } |
4062 | ||
4063 | static void | |
930a9140 RS |
4064 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4065 | Lisp_Object list, overlay; | |
4066 | int after; | |
4067 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4068 | { |
930a9140 | 4069 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4070 | |
930a9140 | 4071 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
4072 | if (! after) |
4073 | add_overlay_mod_hooklist (list, overlay); | |
4074 | ||
173f2a64 RS |
4075 | while (!NILP (list)) |
4076 | { | |
930a9140 RS |
4077 | if (NILP (arg3)) |
4078 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); | |
4079 | else | |
4080 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); | |
173f2a64 RS |
4081 | list = Fcdr (list); |
4082 | } | |
4083 | UNGCPRO; | |
4084 | } | |
9d7608b7 KH |
4085 | |
4086 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4087 | property is set. */ | |
4088 | void | |
4089 | evaporate_overlays (pos) | |
4090 | int pos; | |
4091 | { | |
4092 | Lisp_Object tail, overlay, hit_list; | |
4093 | ||
4094 | hit_list = Qnil; | |
4095 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
4096 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
7539e11f | 4097 | tail = XCDR (tail)) |
9d7608b7 KH |
4098 | { |
4099 | int endpos; | |
7539e11f | 4100 | overlay = XCAR (tail); |
9d7608b7 KH |
4101 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4102 | if (endpos < pos) | |
4103 | break; | |
4104 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4105 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4106 | hit_list = Fcons (overlay, hit_list); |
4107 | } | |
4108 | else | |
4109 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
7539e11f | 4110 | tail = XCDR (tail)) |
9d7608b7 KH |
4111 | { |
4112 | int startpos; | |
7539e11f | 4113 | overlay = XCAR (tail); |
9d7608b7 KH |
4114 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4115 | if (startpos > pos) | |
4116 | break; | |
4117 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4118 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4119 | hit_list = Fcons (overlay, hit_list); |
4120 | } | |
7539e11f KR |
4121 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4122 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4123 | } |
173f2a64 | 4124 | \f |
54dfdeb0 | 4125 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4126 | in the slot with offset OFFSET. */ |
4127 | ||
0fa3ba92 | 4128 | void |
54dfdeb0 KH |
4129 | buffer_slot_type_mismatch (offset) |
4130 | int offset; | |
0fa3ba92 | 4131 | { |
54dfdeb0 | 4132 | Lisp_Object sym; |
0fa3ba92 | 4133 | char *type_name; |
7c02e886 | 4134 | |
7313acd0 | 4135 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4136 | { |
7c02e886 GM |
4137 | case Lisp_Int: |
4138 | type_name = "integers"; | |
4139 | break; | |
4140 | ||
4141 | case Lisp_String: | |
4142 | type_name = "strings"; | |
4143 | break; | |
4144 | ||
4145 | case Lisp_Symbol: | |
4146 | type_name = "symbols"; | |
4147 | break; | |
4148 | ||
0fa3ba92 JB |
4149 | default: |
4150 | abort (); | |
4151 | } | |
4152 | ||
7313acd0 | 4153 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4154 | error ("Only %s should be stored in the buffer-local variable %s", |
54dfdeb0 | 4155 | type_name, XSYMBOL (sym)->name->data); |
0fa3ba92 | 4156 | } |
7c02e886 | 4157 | |
0fa3ba92 | 4158 | \f |
b86af064 GM |
4159 | /*********************************************************************** |
4160 | Allocation with mmap | |
4161 | ***********************************************************************/ | |
4162 | ||
4163 | #ifdef USE_MMAP_FOR_BUFFERS | |
4164 | ||
4165 | #include <sys/types.h> | |
4166 | #include <sys/mman.h> | |
4167 | ||
4168 | #ifndef MAP_ANON | |
4169 | #ifdef MAP_ANONYMOUS | |
4170 | #define MAP_ANON MAP_ANONYMOUS | |
4171 | #else | |
4172 | #define MAP_ANON 0 | |
4173 | #endif | |
4174 | #endif | |
4175 | ||
09dfdf85 GM |
4176 | #ifndef MAP_FAILED |
4177 | #define MAP_FAILED ((void *) -1) | |
4178 | #endif | |
4179 | ||
b86af064 GM |
4180 | #include <stdio.h> |
4181 | #include <errno.h> | |
4182 | ||
4183 | #if MAP_ANON == 0 | |
4184 | #include <fcntl.h> | |
4185 | #endif | |
4186 | ||
4187 | #include "coding.h" | |
4188 | ||
4189 | ||
4190 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4191 | The current implementation lets the system select mapped | |
4192 | addresses; we're not using MAP_FIXED in general, except when | |
4193 | trying to enlarge regions. | |
4194 | ||
4195 | Each mapped region starts with a mmap_region structure, the user | |
4196 | area starts after that structure, aligned to MEM_ALIGN. | |
4197 | ||
4198 | +-----------------------+ | |
4199 | | struct mmap_info + | | |
4200 | | padding | | |
4201 | +-----------------------+ | |
4202 | | user data | | |
4203 | | | | |
4204 | | | | |
4205 | +-----------------------+ */ | |
4206 | ||
4207 | struct mmap_region | |
4208 | { | |
4209 | /* User-specified size. */ | |
4210 | size_t nbytes_specified; | |
4211 | ||
4212 | /* Number of bytes mapped */ | |
4213 | size_t nbytes_mapped; | |
4214 | ||
4215 | /* Pointer to the location holding the address of the memory | |
4216 | allocated with the mmap'd block. The variable actually points | |
4217 | after this structure. */ | |
4218 | POINTER_TYPE **var; | |
4219 | ||
4220 | /* Next and previous in list of all mmap'd regions. */ | |
4221 | struct mmap_region *next, *prev; | |
4222 | }; | |
4223 | ||
4224 | /* Doubly-linked list of mmap'd regions. */ | |
4225 | ||
4226 | static struct mmap_region *mmap_regions; | |
4227 | ||
4228 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4229 | /dev/zero will be opened on it. */ | |
4230 | ||
4231 | static int mmap_fd; | |
4232 | ||
4233 | /* Temporary storage for mmap_set_vars, see there. */ | |
4234 | ||
4235 | static struct mmap_region *mmap_regions_1; | |
4236 | static int mmap_fd_1; | |
4237 | ||
4238 | /* Page size on this system. */ | |
4239 | ||
4240 | static int mmap_page_size; | |
4241 | ||
4242 | /* 1 means mmap has been intialized. */ | |
4243 | ||
4244 | static int mmap_initialized_p; | |
4245 | ||
4246 | /* Value is X rounded up to the next multiple of N. */ | |
4247 | ||
4248 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4249 | ||
4250 | /* Size of mmap_region structure plus padding. */ | |
4251 | ||
4252 | #define MMAP_REGION_STRUCT_SIZE \ | |
4253 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4254 | ||
4255 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4256 | region, return a pointer to the start of the region. */ | |
4257 | ||
4258 | #define MMAP_REGION(P) \ | |
4259 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4260 | ||
4261 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4262 | to the start of the user-visible part of the region. */ | |
4263 | ||
4264 | #define MMAP_USER_AREA(P) \ | |
4265 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4266 | ||
4267 | #define MEM_ALIGN sizeof (double) | |
4268 | ||
4269 | /* Function prototypes. */ | |
4270 | ||
4271 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4272 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4273 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4274 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4275 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4276 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4277 | static void mmap_init P_ ((void)); | |
4278 | ||
4279 | ||
4280 | /* Return a region overlapping address range START...END, or null if | |
4281 | none. END is not including, i.e. the last byte in the range | |
4282 | is at END - 1. */ | |
4283 | ||
4284 | static struct mmap_region * | |
4285 | mmap_find (start, end) | |
4286 | POINTER_TYPE *start, *end; | |
4287 | { | |
4288 | struct mmap_region *r; | |
4289 | char *s = (char *) start, *e = (char *) end; | |
4290 | ||
4291 | for (r = mmap_regions; r; r = r->next) | |
4292 | { | |
4293 | char *rstart = (char *) r; | |
4294 | char *rend = rstart + r->nbytes_mapped; | |
4295 | ||
4296 | if (/* First byte of range, i.e. START, in this region? */ | |
4297 | (s >= rstart && s < rend) | |
4298 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4299 | || (e > rstart && e <= rend) | |
4300 | /* First byte of this region in the range? */ | |
4301 | || (rstart >= s && rstart < e) | |
4302 | /* Last byte of this region in the range? */ | |
4303 | || (rend > s && rend <= e)) | |
4304 | break; | |
4305 | } | |
4306 | ||
4307 | return r; | |
4308 | } | |
4309 | ||
4310 | ||
4311 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4312 | the region. Value is non-zero if successful. */ | |
4313 | ||
4314 | static int | |
4315 | mmap_free_1 (r) | |
4316 | struct mmap_region *r; | |
4317 | { | |
4318 | if (r->next) | |
4319 | r->next->prev = r->prev; | |
4320 | if (r->prev) | |
4321 | r->prev->next = r->next; | |
4322 | else | |
4323 | mmap_regions = r->next; | |
4324 | ||
1a15cca0 | 4325 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4326 | { |
4327 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4328 | return 0; | |
4329 | } | |
4330 | ||
4331 | return 1; | |
4332 | } | |
4333 | ||
4334 | ||
4335 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4336 | Value is non-zero if successful. */ | |
4337 | ||
4338 | static int | |
4339 | mmap_enlarge (r, npages) | |
4340 | struct mmap_region *r; | |
4341 | int npages; | |
4342 | { | |
4343 | char *region_end = (char *) r + r->nbytes_mapped; | |
4344 | size_t nbytes; | |
4345 | int success = 0; | |
4346 | ||
4347 | if (npages < 0) | |
4348 | { | |
4349 | /* Unmap pages at the end of the region. */ | |
4350 | nbytes = - npages * mmap_page_size; | |
4351 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4352 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4353 | else | |
4354 | { | |
4355 | r->nbytes_mapped -= nbytes; | |
4356 | success = 1; | |
4357 | } | |
4358 | } | |
4359 | else if (npages > 0) | |
4360 | { | |
4361 | struct mmap_region *r2; | |
4362 | ||
4363 | nbytes = npages * mmap_page_size; | |
4364 | ||
4365 | /* Try to map additional pages at the end of the region. We | |
4366 | cannot do this if the address range is already occupied by | |
4367 | something else because mmap deletes any previous mapping. | |
4368 | I'm not sure this is worth doing, let's see. */ | |
4369 | r2 = mmap_find (region_end, region_end + nbytes); | |
4370 | if (r2 == NULL) | |
4371 | { | |
4372 | POINTER_TYPE *p; | |
4373 | ||
4374 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, | |
4375 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4376 | if (p == MAP_FAILED) | |
edaa9aed | 4377 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4378 | else if (p != (POINTER_TYPE *) region_end) |
4379 | { | |
4380 | /* Kernels are free to choose a different address. In | |
4381 | that case, unmap what we've mapped above; we have | |
4382 | no use for it. */ | |
4383 | if (munmap (p, nbytes) == -1) | |
4384 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4385 | } | |
4386 | else | |
4387 | { | |
4388 | r->nbytes_mapped += nbytes; | |
4389 | success = 1; | |
4390 | } | |
4391 | } | |
4392 | } | |
4393 | ||
4394 | return success; | |
4395 | } | |
4396 | ||
4397 | ||
4398 | /* Set or reset variables holding references to mapped regions. If | |
4399 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4400 | non-zero, set all variables to the start of the user-areas | |
4401 | of mapped regions. | |
4402 | ||
4403 | This function is called from Fdump_emacs to ensure that the dumped | |
4404 | Emacs doesn't contain references to memory that won't be mapped | |
4405 | when Emacs starts. */ | |
4406 | ||
4407 | void | |
4408 | mmap_set_vars (restore_p) | |
4409 | int restore_p; | |
4410 | { | |
4411 | struct mmap_region *r; | |
4412 | ||
4413 | if (restore_p) | |
4414 | { | |
4415 | mmap_regions = mmap_regions_1; | |
4416 | mmap_fd = mmap_fd_1; | |
4417 | for (r = mmap_regions; r; r = r->next) | |
4418 | *r->var = MMAP_USER_AREA (r); | |
4419 | } | |
4420 | else | |
4421 | { | |
4422 | for (r = mmap_regions; r; r = r->next) | |
4423 | *r->var = NULL; | |
4424 | mmap_regions_1 = mmap_regions; | |
4425 | mmap_regions = NULL; | |
4426 | mmap_fd_1 = mmap_fd; | |
4427 | mmap_fd = -1; | |
4428 | } | |
4429 | } | |
4430 | ||
4431 | ||
4432 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4433 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4434 | address of some variable which will use the data area. | |
4435 | ||
4436 | The allocation of 0 bytes is valid. | |
4437 | ||
4438 | If we can't allocate the necessary memory, set *VAR to null, and | |
4439 | return null. */ | |
4440 | ||
4441 | static POINTER_TYPE * | |
4442 | mmap_alloc (var, nbytes) | |
4443 | POINTER_TYPE **var; | |
4444 | size_t nbytes; | |
4445 | { | |
4446 | void *p; | |
4447 | size_t map; | |
4448 | ||
4449 | mmap_init (); | |
4450 | ||
4451 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4452 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4453 | mmap_fd, 0); | |
4454 | ||
4455 | if (p == MAP_FAILED) | |
4456 | { | |
4457 | if (errno != ENOMEM) | |
4458 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4459 | p = NULL; | |
4460 | } | |
4461 | else | |
4462 | { | |
4463 | struct mmap_region *r = (struct mmap_region *) p; | |
4464 | ||
4465 | r->nbytes_specified = nbytes; | |
4466 | r->nbytes_mapped = map; | |
4467 | r->var = var; | |
4468 | r->prev = NULL; | |
4469 | r->next = mmap_regions; | |
4470 | if (r->next) | |
4471 | r->next->prev = r; | |
4472 | mmap_regions = r; | |
4473 | ||
4474 | p = MMAP_USER_AREA (p); | |
4475 | } | |
4476 | ||
4477 | return *var = p; | |
4478 | } | |
4479 | ||
4480 | ||
4481 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4482 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4483 | and return this value. If more memory cannot be allocated, then | |
4484 | leave *VAR unchanged, and return null. */ | |
4485 | ||
4486 | static POINTER_TYPE * | |
4487 | mmap_realloc (var, nbytes) | |
4488 | POINTER_TYPE **var; | |
4489 | size_t nbytes; | |
4490 | { | |
4491 | POINTER_TYPE *result; | |
4492 | ||
4493 | mmap_init (); | |
4494 | ||
4495 | if (*var == NULL) | |
4496 | result = mmap_alloc (var, nbytes); | |
4497 | else if (nbytes == 0) | |
4498 | { | |
4499 | mmap_free (var); | |
4500 | result = mmap_alloc (var, nbytes); | |
4501 | } | |
4502 | else | |
4503 | { | |
4504 | struct mmap_region *r = MMAP_REGION (*var); | |
4505 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
4506 | ||
4507 | if (room < nbytes) | |
4508 | { | |
4509 | /* Must enlarge. */ | |
4510 | POINTER_TYPE *old_ptr = *var; | |
4511 | ||
4512 | /* Try to map additional pages at the end of the region. | |
4513 | If that fails, allocate a new region, copy data | |
4514 | from the old region, then free it. */ | |
4515 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4516 | / mmap_page_size))) | |
4517 | { | |
4518 | r->nbytes_specified = nbytes; | |
4519 | *var = result = old_ptr; | |
4520 | } | |
4521 | else if (mmap_alloc (var, nbytes)) | |
4522 | { | |
4523 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4524 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4525 | result = *var; | |
4526 | r = MMAP_REGION (result); | |
4527 | r->nbytes_specified = nbytes; | |
4528 | } | |
4529 | else | |
4530 | { | |
4531 | *var = old_ptr; | |
4532 | result = NULL; | |
4533 | } | |
4534 | } | |
4535 | else if (room - nbytes >= mmap_page_size) | |
4536 | { | |
4537 | /* Shrinking by at least a page. Let's give some | |
4538 | memory back to the system. */ | |
4539 | mmap_enlarge (r, - (room - nbytes) / mmap_page_size); | |
4540 | result = *var; | |
4541 | r->nbytes_specified = nbytes; | |
4542 | } | |
4543 | else | |
4544 | { | |
4545 | /* Leave it alone. */ | |
4546 | result = *var; | |
4547 | r->nbytes_specified = nbytes; | |
4548 | } | |
4549 | } | |
4550 | ||
4551 | return result; | |
4552 | } | |
4553 | ||
4554 | ||
4555 | /* Free a block of relocatable storage whose data is pointed to by | |
4556 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4557 | ||
4558 | static void | |
4559 | mmap_free (var) | |
4560 | POINTER_TYPE **var; | |
4561 | { | |
4562 | mmap_init (); | |
4563 | ||
4564 | if (*var) | |
4565 | { | |
4566 | mmap_free_1 (MMAP_REGION (*var)); | |
4567 | *var = NULL; | |
4568 | } | |
4569 | } | |
4570 | ||
4571 | ||
4572 | /* Perform necessary intializations for the use of mmap. */ | |
4573 | ||
4574 | static void | |
4575 | mmap_init () | |
4576 | { | |
4577 | #if MAP_ANON == 0 | |
4578 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4579 | in a dumped Emacs. */ | |
4580 | if (mmap_fd <= 0) | |
4581 | { | |
4582 | /* No anonymous mmap -- we need the file descriptor. */ | |
4583 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4584 | if (mmap_fd == -1) | |
4585 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4586 | } | |
4587 | #endif /* MAP_ANON == 0 */ | |
4588 | ||
4589 | if (mmap_initialized_p) | |
4590 | return; | |
4591 | mmap_initialized_p = 1; | |
4592 | ||
4593 | #if MAP_ANON != 0 | |
4594 | mmap_fd = -1; | |
4595 | #endif | |
4596 | ||
4597 | mmap_page_size = getpagesize (); | |
4598 | } | |
4599 | ||
4600 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4601 | ||
4602 | ||
4603 | \f | |
4604 | /*********************************************************************** | |
4605 | Buffer-text Allocation | |
4606 | ***********************************************************************/ | |
4607 | ||
4608 | #ifdef REL_ALLOC | |
4609 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4610 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4611 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4612 | #endif /* REL_ALLOC */ | |
4613 | ||
4614 | ||
4615 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4616 | ||
4617 | static void | |
4618 | alloc_buffer_text (b, nbytes) | |
4619 | struct buffer *b; | |
4620 | size_t nbytes; | |
4621 | { | |
4622 | POINTER_TYPE *p; | |
4623 | ||
4624 | BLOCK_INPUT; | |
4625 | #if defined USE_MMAP_FOR_BUFFERS | |
4626 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4627 | #elif defined REL_ALLOC | |
4628 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4629 | #else | |
815add84 | 4630 | p = xmalloc (nbytes); |
b86af064 GM |
4631 | #endif |
4632 | ||
4633 | if (p == NULL) | |
4634 | { | |
4635 | UNBLOCK_INPUT; | |
4636 | memory_full (); | |
4637 | } | |
4638 | ||
4639 | b->text->beg = (unsigned char *) p; | |
4640 | UNBLOCK_INPUT; | |
4641 | } | |
4642 | ||
4643 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4644 | shrink it. */ | |
4645 | ||
4646 | void | |
4647 | enlarge_buffer_text (b, delta) | |
4648 | struct buffer *b; | |
4649 | int delta; | |
4650 | { | |
4651 | POINTER_TYPE *p; | |
4652 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4653 | + delta); | |
4654 | BLOCK_INPUT; | |
4655 | #if defined USE_MMAP_FOR_BUFFERS | |
4656 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4657 | #elif defined REL_ALLOC | |
4658 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4659 | #else | |
4660 | p = xrealloc (b->text->beg, nbytes); | |
4661 | #endif | |
4662 | ||
4663 | if (p == NULL) | |
4664 | { | |
4665 | UNBLOCK_INPUT; | |
4666 | memory_full (); | |
4667 | } | |
4668 | ||
4669 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4670 | UNBLOCK_INPUT; | |
4671 | } | |
4672 | ||
4673 | ||
4674 | /* Free buffer B's text buffer. */ | |
4675 | ||
4676 | static void | |
4677 | free_buffer_text (b) | |
4678 | struct buffer *b; | |
4679 | { | |
4680 | BLOCK_INPUT; | |
4681 | ||
4682 | #if defined USE_MMAP_FOR_BUFFERS | |
4683 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4684 | #elif defined REL_ALLOC | |
4685 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4686 | #else | |
4687 | xfree (b->text->beg); | |
4688 | #endif | |
4689 | ||
4690 | BUF_BEG_ADDR (b) = NULL; | |
4691 | UNBLOCK_INPUT; | |
4692 | } | |
4693 | ||
4694 | ||
4695 | \f | |
4696 | /*********************************************************************** | |
4697 | Initialization | |
4698 | ***********************************************************************/ | |
4699 | ||
dfcf069d | 4700 | void |
1ab256cb RM |
4701 | init_buffer_once () |
4702 | { | |
7c02e886 GM |
4703 | int idx; |
4704 | ||
4705 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4706 | |
1ab256cb RM |
4707 | /* Make sure all markable slots in buffer_defaults |
4708 | are initialized reasonably, so mark_buffer won't choke. */ | |
4709 | reset_buffer (&buffer_defaults); | |
13de9290 | 4710 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4711 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4712 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4713 | /* Prevent GC from getting confused. */ |
4714 | buffer_defaults.text = &buffer_defaults.own_text; | |
4715 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4716 | BUF_INTERVALS (&buffer_defaults) = 0; |
4717 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4718 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4719 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4720 | |
4721 | /* Set up the default values of various buffer slots. */ | |
4722 | /* Must do these before making the first buffer! */ | |
4723 | ||
f532dca0 | 4724 | /* real setup is done in bindings.el */ |
1ab256cb | 4725 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4726 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4727 | buffer_defaults.abbrev_mode = Qnil; |
4728 | buffer_defaults.overwrite_mode = Qnil; | |
4729 | buffer_defaults.case_fold_search = Qt; | |
4730 | buffer_defaults.auto_fill_function = Qnil; | |
4731 | buffer_defaults.selective_display = Qnil; | |
4732 | #ifndef old | |
4733 | buffer_defaults.selective_display_ellipses = Qt; | |
4734 | #endif | |
4735 | buffer_defaults.abbrev_table = Qnil; | |
4736 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4737 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4738 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4739 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
4740 | buffer_defaults.overlays_before = Qnil; |
4741 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 4742 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 4743 | |
8d7a4592 | 4744 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4745 | buffer_defaults.truncate_lines = Qnil; |
4746 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4747 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4748 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4749 | buffer_defaults.extra_line_spacing = Qnil; |
1ab256cb | 4750 | |
f7975d07 | 4751 | #ifdef DOS_NT |
0776cb1b | 4752 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4753 | #endif |
a1a17b61 | 4754 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4755 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4756 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4757 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4758 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4759 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4760 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
4761 | buffer_defaults.indicate_empty_lines = Qnil; |
4762 | buffer_defaults.scroll_up_aggressively = Qnil; | |
4763 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 4764 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
4765 | |
4766 | /* Assign the local-flags to the slots that have default values. | |
4767 | The local flag is a bit that is used in the buffer | |
4768 | to say that it has its own local value for the slot. | |
4769 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4770 | ||
4771 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 4772 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
4773 | |
4774 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
4775 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
4776 | XSETINT (buffer_local_flags.filename, -1); |
4777 | XSETINT (buffer_local_flags.directory, -1); | |
4778 | XSETINT (buffer_local_flags.backed_up, -1); | |
4779 | XSETINT (buffer_local_flags.save_length, -1); | |
4780 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
4781 | XSETINT (buffer_local_flags.read_only, -1); | |
4782 | XSETINT (buffer_local_flags.major_mode, -1); | |
4783 | XSETINT (buffer_local_flags.mode_name, -1); | |
4784 | XSETINT (buffer_local_flags.undo_list, -1); | |
4785 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 4786 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 4787 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 4788 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 4789 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 4790 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 4791 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 4792 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 4793 | |
7c02e886 GM |
4794 | idx = 1; |
4795 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
4796 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
4797 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
4798 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
4799 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
4800 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 4801 | #ifndef old |
7c02e886 | 4802 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 4803 | #endif |
7c02e886 GM |
4804 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
4805 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
4806 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
4807 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
4808 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
4809 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
4810 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 4811 | #ifdef DOS_NT |
7c02e886 | 4812 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 4813 | /* Make this one a permanent local. */ |
7c02e886 | 4814 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 4815 | #endif |
7c02e886 GM |
4816 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
4817 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
4818 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
4819 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
4820 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); | |
a1a17b61 | 4821 | /* Make this one a permanent local. */ |
7c02e886 GM |
4822 | buffer_permanent_local_flags[idx++] = 1; |
4823 | XSETFASTINT (buffer_local_flags.left_margin_width, idx); ++idx; | |
4824 | XSETFASTINT (buffer_local_flags.right_margin_width, idx); ++idx; | |
4825 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; | |
4826 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; | |
4827 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
4828 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 4829 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 4830 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
7c02e886 GM |
4831 | |
4832 | /* Need more room? */ | |
7313acd0 | 4833 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 4834 | abort (); |
7313acd0 | 4835 | last_per_buffer_idx = idx; |
c71b5d9b | 4836 | |
1ab256cb RM |
4837 | Vbuffer_alist = Qnil; |
4838 | current_buffer = 0; | |
4839 | all_buffers = 0; | |
4840 | ||
4841 | QSFundamental = build_string ("Fundamental"); | |
4842 | ||
4843 | Qfundamental_mode = intern ("fundamental-mode"); | |
4844 | buffer_defaults.major_mode = Qfundamental_mode; | |
4845 | ||
4846 | Qmode_class = intern ("mode-class"); | |
4847 | ||
4848 | Qprotected_field = intern ("protected-field"); | |
4849 | ||
4850 | Qpermanent_local = intern ("permanent-local"); | |
4851 | ||
4852 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
4853 | ||
4854 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); | |
000f8083 | 4855 | |
1ab256cb RM |
4856 | /* super-magic invisible buffer */ |
4857 | Vbuffer_alist = Qnil; | |
4858 | ||
ffd56f97 | 4859 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
4860 | |
4861 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
4862 | } |
4863 | ||
dfcf069d | 4864 | void |
1ab256cb RM |
4865 | init_buffer () |
4866 | { | |
93c27ef1 | 4867 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
4868 | char *pwd; |
4869 | struct stat dotstat, pwdstat; | |
136351b7 | 4870 | Lisp_Object temp; |
f7975d07 | 4871 | int rc; |
1ab256cb | 4872 | |
b86af064 | 4873 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
4874 | { |
4875 | /* When using the ralloc implementation based on mmap(2), buffer | |
4876 | text pointers will have been set to null in the dumped Emacs. | |
4877 | Map new memory. */ | |
4878 | struct buffer *b; | |
4879 | ||
93c27ef1 GM |
4880 | for (b = all_buffers; b; b = b->next) |
4881 | if (b->text->beg == NULL) | |
b86af064 | 4882 | enlarge_buffer_text (b, 0); |
93c27ef1 | 4883 | } |
b86af064 | 4884 | #endif /* USE_MMAP_FOR_BUFFERS */ |
93c27ef1 | 4885 | |
1ab256cb | 4886 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
4887 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
4888 | Fset_buffer_multibyte (Qnil); | |
2381d133 JB |
4889 | |
4890 | /* If PWD is accurate, use it instead of calling getwd. This is faster | |
4891 | when PWD is right, and may avoid a fatal error. */ | |
309f2a6e RS |
4892 | if ((pwd = getenv ("PWD")) != 0 |
4893 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
4894 | && stat (pwd, &pwdstat) == 0 |
4895 | && stat (".", &dotstat) == 0 | |
4896 | && dotstat.st_ino == pwdstat.st_ino | |
4897 | && dotstat.st_dev == pwdstat.st_dev | |
4898 | && strlen (pwd) < MAXPATHLEN) | |
4899 | strcpy (buf, pwd); | |
6335beb0 RS |
4900 | #ifdef HAVE_GETCWD |
4901 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 4902 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 4903 | #else |
2381d133 | 4904 | else if (getwd (buf) == 0) |
cf1e6391 | 4905 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 4906 | #endif |
1ab256cb RM |
4907 | |
4908 | #ifndef VMS | |
4909 | /* Maybe this should really use some standard subroutine | |
4910 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
4911 | rc = strlen (buf); |
4912 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
4913 | { | |
4914 | buf[rc] = DIRECTORY_SEP; | |
4915 | buf[rc + 1] = '\0'; | |
4916 | } | |
1ab256cb | 4917 | #endif /* not VMS */ |
0995fa35 | 4918 | |
1ab256cb | 4919 | current_buffer->directory = build_string (buf); |
136351b7 | 4920 | |
0995fa35 RS |
4921 | /* Add /: to the front of the name |
4922 | if it would otherwise be treated as magic. */ | |
4923 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
4924 | if (! NILP (temp) |
4925 | /* If the default dir is just /, TEMP is non-nil | |
4926 | because of the ange-ftp completion handler. | |
4927 | However, it is not necessary to turn / into /:/. | |
4928 | So avoid doing that. */ | |
4929 | && strcmp ("/", XSTRING (current_buffer->directory)->data)) | |
0995fa35 RS |
4930 | current_buffer->directory |
4931 | = concat2 (build_string ("/:"), current_buffer->directory); | |
4932 | ||
136351b7 RS |
4933 | temp = get_minibuffer (0); |
4934 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
4935 | } |
4936 | ||
4937 | /* initialize the buffer routines */ | |
dfcf069d | 4938 | void |
1ab256cb RM |
4939 | syms_of_buffer () |
4940 | { | |
9115729e KH |
4941 | staticpro (&last_overlay_modification_hooks); |
4942 | last_overlay_modification_hooks | |
4943 | = Fmake_vector (make_number (10), Qnil); | |
4944 | ||
1ab256cb RM |
4945 | staticpro (&Vbuffer_defaults); |
4946 | staticpro (&Vbuffer_local_symbols); | |
4947 | staticpro (&Qfundamental_mode); | |
4948 | staticpro (&Qmode_class); | |
4949 | staticpro (&QSFundamental); | |
4950 | staticpro (&Vbuffer_alist); | |
4951 | staticpro (&Qprotected_field); | |
4952 | staticpro (&Qpermanent_local); | |
4953 | staticpro (&Qkill_buffer_hook); | |
22378665 | 4954 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 4955 | staticpro (&Qoverlayp); |
9d7608b7 KH |
4956 | Qevaporate = intern ("evaporate"); |
4957 | staticpro (&Qevaporate); | |
294d215f | 4958 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 4959 | staticpro (&Qmodification_hooks); |
294d215f | 4960 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 4961 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 4962 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 4963 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 4964 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 4965 | staticpro (&Qget_file_buffer); |
5985d248 KH |
4966 | Qpriority = intern ("priority"); |
4967 | staticpro (&Qpriority); | |
4968 | Qwindow = intern ("window"); | |
4969 | staticpro (&Qwindow); | |
bbbe9545 KH |
4970 | Qbefore_string = intern ("before-string"); |
4971 | staticpro (&Qbefore_string); | |
4972 | Qafter_string = intern ("after-string"); | |
4973 | staticpro (&Qafter_string); | |
22378665 RS |
4974 | Qfirst_change_hook = intern ("first-change-hook"); |
4975 | staticpro (&Qfirst_change_hook); | |
4976 | Qbefore_change_functions = intern ("before-change-functions"); | |
4977 | staticpro (&Qbefore_change_functions); | |
4978 | Qafter_change_functions = intern ("after-change-functions"); | |
4979 | staticpro (&Qafter_change_functions); | |
1ab256cb RM |
4980 | |
4981 | Fput (Qprotected_field, Qerror_conditions, | |
4982 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
4983 | Fput (Qprotected_field, Qerror_message, | |
4984 | build_string ("Attempt to modify a protected field")); | |
4985 | ||
4986 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
4987 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
4988 | ||
4989 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
4990 | &buffer_defaults.mode_line_format, | |
4991 | "Default value of `mode-line-format' for buffers that don't override it.\n\ | |
4992 | This is the same as (default-value 'mode-line-format)."); | |
4993 | ||
045dee35 GM |
4994 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
4995 | &buffer_defaults.header_line_format, | |
4996 | "Default value of `header-line-format' for buffers that don't override it.\n\ | |
4997 | This is the same as (default-value 'header-line-format)."); | |
0552666b | 4998 | |
bd96bd79 GM |
4999 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5000 | "Default value of `cursor-type' for buffers that don't override it.\n\ | |
5001 | This is the same as (default-value 'cursor-type)."); | |
5002 | ||
a3bbced0 GM |
5003 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
5004 | &buffer_defaults.extra_line_spacing, | |
5005 | "Default value of `line-spacing' for buffers that don't override it.\n\ | |
5006 | This is the same as (default-value 'line-spacing)."); | |
5007 | ||
1ab256cb RM |
5008 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
5009 | &buffer_defaults.abbrev_mode, | |
5010 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ | |
5011 | This is the same as (default-value 'abbrev-mode)."); | |
5012 | ||
5013 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
5014 | &buffer_defaults.ctl_arrow, | |
5015 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ | |
5016 | This is the same as (default-value 'ctl-arrow)."); | |
5017 | ||
3b06f880 KH |
5018 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5019 | &buffer_defaults.direction_reversed, | |
5020 | "Default value of `direction_reversed' for buffers that do not override it.\n\ | |
5021 | This is the same as (default-value 'direction-reversed)."); | |
5022 | ||
a1a17b61 KH |
5023 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5024 | &buffer_defaults.enable_multibyte_characters, | |
ed8300d9 | 5025 | "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ |
53fe786d | 5026 | This is the same as (default-value 'enable-multibyte-characters)."); |
a1a17b61 | 5027 | |
c71b5d9b KH |
5028 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5029 | &buffer_defaults.buffer_file_coding_system, | |
5030 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ | |
53fe786d | 5031 | This is the same as (default-value 'buffer-file-coding-system)."); |
c71b5d9b | 5032 | |
1ab256cb RM |
5033 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
5034 | &buffer_defaults.truncate_lines, | |
5035 | "Default value of `truncate-lines' for buffers that do not override it.\n\ | |
5036 | This is the same as (default-value 'truncate-lines)."); | |
5037 | ||
5038 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
5039 | &buffer_defaults.fill_column, | |
5040 | "Default value of `fill-column' for buffers that do not override it.\n\ | |
5041 | This is the same as (default-value 'fill-column)."); | |
5042 | ||
5043 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
5044 | &buffer_defaults.left_margin, | |
5045 | "Default value of `left-margin' for buffers that do not override it.\n\ | |
5046 | This is the same as (default-value 'left-margin)."); | |
5047 | ||
5048 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
5049 | &buffer_defaults.tab_width, | |
5050 | "Default value of `tab-width' for buffers that do not override it.\n\ | |
5051 | This is the same as (default-value 'tab-width)."); | |
5052 | ||
5053 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
5054 | &buffer_defaults.case_fold_search, | |
5055 | "Default value of `case-fold-search' for buffers that don't override it.\n\ | |
5056 | This is the same as (default-value 'case-fold-search)."); | |
5057 | ||
f7975d07 | 5058 | #ifdef DOS_NT |
54ad07d3 RS |
5059 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
5060 | &buffer_defaults.buffer_file_type, | |
5061 | "Default file type for buffers that do not override it.\n\ | |
5062 | This is the same as (default-value 'buffer-file-type).\n\ | |
5063 | The file type is nil for text, t for binary."); | |
5064 | #endif | |
5065 | ||
0552666b GM |
5066 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
5067 | &buffer_defaults.left_margin_width, | |
5068 | "Default value of `left-margin-width' for buffers that don't override it.\n\ | |
5069 | This is the same as (default-value 'left-margin-width)."); | |
5070 | ||
5071 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
5072 | &buffer_defaults.right_margin_width, | |
5073 | "Default value of `right_margin_width' for buffers that don't override it.\n\ | |
5074 | This is the same as (default-value 'right-margin-width)."); | |
5075 | ||
5076 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
5077 | &buffer_defaults.indicate_empty_lines, | |
5078 | "Default value of `indicate-empty-lines' for buffers that don't override it.\n\ | |
5079 | This is the same as (default-value 'indicate-empty-lines)."); | |
5080 | ||
5081 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
5082 | &buffer_defaults.scroll_up_aggressively, | |
5083 | "Default value of `scroll-up-aggressively' for buffers that\n\ | |
5084 | don't override it. This is the same as (default-value\n\ | |
5085 | 'scroll-up-aggressively)."); | |
5086 | ||
5087 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
5088 | &buffer_defaults.scroll_down_aggressively, | |
5089 | "Default value of `scroll-down-aggressively' for buffers that\n\ | |
5090 | don't override it. This is the same as (default-value\n\ | |
5091 | 'scroll-down-aggressively)."); | |
5092 | ||
045dee35 GM |
5093 | DEFVAR_PER_BUFFER ("header-line-format", |
5094 | ¤t_buffer->header_line_format, | |
0552666b | 5095 | Qnil, |
2ab62c6c GM |
5096 | "Analogous to `mode-line-format', but for the mode line that can be\n\ |
5097 | displayed at the top of a window."); | |
0552666b | 5098 | |
0fa3ba92 JB |
5099 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
5100 | Qnil, 0); | |
1ab256cb RM |
5101 | |
5102 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. | |
5103 | But make-docfile finds it! | |
5104 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, | |
bec44fd6 | 5105 | Qnil, |
1ab256cb RM |
5106 | "Template for displaying mode line for current buffer.\n\ |
5107 | Each buffer has its own value of this variable.\n\ | |
0552666b GM |
5108 | Value may be nil, a string, a symbol or a list or cons cell.\n\ |
5109 | A value of nil means don't display a mode line.\n\ | |
1ab256cb RM |
5110 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
5111 | A string appearing directly as the value of a symbol is processed verbatim\n\ | |
5112 | in that the %-constructs below are not recognized.\n\ | |
fe512f27 GM |
5113 | For a list of the form `(:eval FORM)', FORM is evaluated and the result\n\ |
5114 | is used as a mode line element.\n\ | |
1ab256cb RM |
5115 | For a list whose car is a symbol, the symbol's value is taken,\n\ |
5116 | and if that is non-nil, the cadr of the list is processed recursively.\n\ | |
5117 | Otherwise, the caddr of the list (if there is one) is processed.\n\ | |
5118 | For a list whose car is a string or list, each element is processed\n\ | |
5119 | recursively and the results are effectively concatenated.\n\ | |
5120 | For a list whose car is an integer, the cdr of the list is processed\n\ | |
5121 | and padded (if the number is positive) or truncated (if negative)\n\ | |
5122 | to the width specified by that number.\n\ | |
5123 | A string is printed verbatim in the mode line except for %-constructs:\n\ | |
5124 | (%-constructs are allowed when the string is the entire mode-line-format\n\ | |
5125 | or when it is found in a cons-cell or a list)\n\ | |
5126 | %b -- print buffer name. %f -- print visited file name.\n\ | |
5d516f2d | 5127 | %F -- print frame name.\n\ |
c2ff34f7 | 5128 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
08de6200 | 5129 | %& is like %*, but ignore read-only-ness.\n\ |
c2ff34f7 RS |
5130 | % means buffer is read-only and * means it is modified.\n\ |
5131 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ | |
a97c374a | 5132 | %s -- print process status. %l -- print the current line number.\n\ |
07924294 | 5133 | %c -- print the current column number (this makes editing slower).\n\ |
6a567ad8 RS |
5134 | To make the column number update correctly in all cases,\n\ |
5135 | `column-number-mode' must be non-nil.\n\ | |
dd24e6a6 | 5136 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
9d130ffc | 5137 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
dd24e6a6 | 5138 | or print Bottom or All.\n\ |
08de6200 | 5139 | %m -- print the mode name.\n\ |
1ab256cb | 5140 | %n -- print Narrow if appropriate.\n\ |
08de6200 EZ |
5141 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems.\n\ |
5142 | %Z -- like %z, but including the end-of-line format.\n\ | |
1ab256cb RM |
5143 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
5144 | %% -- print %. %- -- print infinitely many dashes.\n\ | |
5145 | Decimal digits after the % specify field width to which to pad."); | |
5146 | */ | |
5147 | ||
5148 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, | |
5149 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ | |
5150 | nil here means use current buffer's major mode."); | |
5151 | ||
5152 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
0fa3ba92 | 5153 | make_number (Lisp_Symbol), |
1ab256cb RM |
5154 | "Symbol for current buffer's major mode."); |
5155 | ||
5156 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
0fa3ba92 | 5157 | make_number (Lisp_String), |
1ab256cb RM |
5158 | "Pretty name of current buffer's major mode (a string)."); |
5159 | ||
0fa3ba92 | 5160 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
1ab256cb RM |
5161 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
5162 | Automatically becomes buffer-local when set in any fashion."); | |
5163 | ||
5164 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
0fa3ba92 | 5165 | Qnil, |
5ed62574 | 5166 | "*Non-nil if searches and matches should ignore case.\n\ |
1ab256cb RM |
5167 | Automatically becomes buffer-local when set in any fashion."); |
5168 | ||
5169 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
0fa3ba92 | 5170 | make_number (Lisp_Int), |
1ab256cb RM |
5171 | "*Column beyond which automatic line-wrapping should happen.\n\ |
5172 | Automatically becomes buffer-local when set in any fashion."); | |
5173 | ||
5174 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
0fa3ba92 | 5175 | make_number (Lisp_Int), |
1ab256cb RM |
5176 | "*Column for the default indent-line-function to indent to.\n\ |
5177 | Linefeed indents to this column in Fundamental mode.\n\ | |
5178 | Automatically becomes buffer-local when set in any fashion."); | |
5179 | ||
5180 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
0fa3ba92 | 5181 | make_number (Lisp_Int), |
1ab256cb RM |
5182 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
5183 | Automatically becomes buffer-local when set in any fashion."); | |
5184 | ||
0fa3ba92 | 5185 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
1ab256cb | 5186 | "*Non-nil means display control chars with uparrow.\n\ |
6a99d31d | 5187 | A value of nil means use backslash and octal digits.\n\ |
1ab256cb RM |
5188 | Automatically becomes buffer-local when set in any fashion.\n\ |
5189 | This variable does not apply to characters whose display is specified\n\ | |
5190 | in the current display table (if there is one)."); | |
5191 | ||
3b06f880 | 5192 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf KH |
5193 | ¤t_buffer->enable_multibyte_characters, |
5194 | make_number (-1), | |
36bb26f7 | 5195 | "Non-nil means the buffer contents are regarded as multi-byte characters.\n\ |
ed218f73 | 5196 | Otherwise they are regarded as unibyte. This affects the display,\n\ |
53fe786d RS |
5197 | file I/O and the behavior of various editing commands.\n\ |
5198 | \n\ | |
5199 | This variable is buffer-local but you cannot set it directly;\n\ | |
5200 | use the function `set-buffer-multibyte' to change a buffer's representation.\n\ | |
5201 | Changing its default value with `setq-default' is supported.\n\ | |
5202 | See also variable `default-enable-multibyte-characters' and Info node\n\ | |
5203 | `(elisp)Text Representations'."); | |
3b06f880 | 5204 | |
c71b5d9b KH |
5205 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
5206 | ¤t_buffer->buffer_file_coding_system, Qnil, | |
5207 | "Coding system to be used for encoding the buffer contents on saving.\n\ | |
940daec1 RS |
5208 | This variable applies to saving the buffer, and also to `write-region'\n\ |
5209 | and other functions that use `write-region'.\n\ | |
5210 | It does not apply to sending output to subprocesses, however.\n\ | |
5211 | \n\ | |
5212 | If this is nil, the buffer is saved without any code conversion\n\ | |
5213 | unless some coding system is specified in `file-coding-system-alist'\n\ | |
c71b5d9b KH |
5214 | for the buffer file.\n\ |
5215 | \n\ | |
940daec1 RS |
5216 | The variable `coding-system-for-write', if non-nil, overrides this variable.\n\ |
5217 | \n\ | |
c71b5d9b KH |
5218 | This variable is never applied to a way of decoding\n\ |
5219 | a file while reading it."); | |
5220 | ||
3b06f880 KH |
5221 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
5222 | Qnil, | |
5223 | "*Non-nil means lines in the buffer are displayed right to left."); | |
5224 | ||
0fa3ba92 | 5225 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
1ab256cb RM |
5226 | "*Non-nil means do not display continuation lines;\n\ |
5227 | give each line of text one screen line.\n\ | |
5228 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5229 | \n\ | |
5230 | Note that this is overridden by the variable\n\ | |
5231 | `truncate-partial-width-windows' if that variable is non-nil\n\ | |
502b9b64 | 5232 | and this buffer is not full-frame width."); |
1ab256cb | 5233 | |
f7975d07 | 5234 | #ifdef DOS_NT |
54ad07d3 RS |
5235 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
5236 | Qnil, | |
006d3d34 RS |
5237 | "Non-nil if the visited file is a binary file.\n\ |
5238 | This variable is meaningful on MS-DOG and Windows NT.\n\ | |
5239 | On those systems, it is automatically local in every buffer.\n\ | |
e0585c64 | 5240 | On other systems, this variable is normally always nil."); |
54ad07d3 RS |
5241 | #endif |
5242 | ||
1ab256cb | 5243 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
0fa3ba92 | 5244 | make_number (Lisp_String), |
1ab256cb | 5245 | "Name of default directory of current buffer. Should end with slash.\n\ |
79aa5381 GM |
5246 | Each buffer has its own value of this variable. To change the\n\ |
5247 | default directory, use function `cd'."); | |
1ab256cb RM |
5248 | |
5249 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
0fa3ba92 | 5250 | Qnil, |
1ab256cb | 5251 | "Function called (if non-nil) to perform auto-fill.\n\ |
139f13a7 | 5252 | It is called after self-inserting any character specified in\n\ |
6c9a7472 | 5253 | the `auto-fill-chars' table.\n\ |
1ab256cb | 5254 | Each buffer has its own value of this variable.\n\ |
54158e68 KH |
5255 | NOTE: This variable is not a hook;\n\ |
5256 | its value may not be a list of functions."); | |
1ab256cb RM |
5257 | |
5258 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
0fa3ba92 | 5259 | make_number (Lisp_String), |
1ab256cb RM |
5260 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
5261 | Each buffer has its own value of this variable."); | |
5262 | ||
f6ed2e84 RS |
5263 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
5264 | make_number (Lisp_String), | |
bb4c204e | 5265 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
b1c03e64 RS |
5266 | The truename of a file is calculated by `file-truename'\n\ |
5267 | and then abbreviated with `abbreviate-file-name'.\n\ | |
f6ed2e84 RS |
5268 | Each buffer has its own value of this variable."); |
5269 | ||
1ab256cb | 5270 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5271 | ¤t_buffer->auto_save_file_name, |
0fa3ba92 | 5272 | make_number (Lisp_String), |
1ab256cb RM |
5273 | "Name of file for auto-saving current buffer,\n\ |
5274 | or nil if buffer should not be auto-saved.\n\ | |
5275 | Each buffer has its own value of this variable."); | |
5276 | ||
0fa3ba92 | 5277 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
1ab256cb RM |
5278 | "Non-nil if this buffer is read-only.\n\ |
5279 | Each buffer has its own value of this variable."); | |
5280 | ||
0fa3ba92 | 5281 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
1ab256cb RM |
5282 | "Non-nil if this buffer's file has been backed up.\n\ |
5283 | Backing up is done before the first time the file is saved.\n\ | |
5284 | Each buffer has its own value of this variable."); | |
5285 | ||
5286 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
0fa3ba92 | 5287 | make_number (Lisp_Int), |
1ab256cb RM |
5288 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
5289 | 0 initially.\n\ | |
5290 | Each buffer has its own value of this variable."); | |
5291 | ||
5292 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
0fa3ba92 | 5293 | Qnil, |
1ab256cb RM |
5294 | "Non-nil enables selective display:\n\ |
5295 | Integer N as value means display only lines\n\ | |
5296 | that start with less than n columns of space.\n\ | |
5297 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ | |
5298 | Then ^M's in the file are written into files as newlines.\n\n\ | |
5299 | Automatically becomes buffer-local when set in any fashion."); | |
5300 | ||
5301 | #ifndef old | |
5302 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5303 | ¤t_buffer->selective_display_ellipses, | |
0fa3ba92 | 5304 | Qnil, |
1ab256cb RM |
5305 | "t means display ... on previous line when a line is invisible.\n\ |
5306 | Automatically becomes buffer-local when set in any fashion."); | |
5307 | #endif | |
5308 | ||
0fa3ba92 | 5309 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
1ab256cb | 5310 | "Non-nil if self-insertion should replace existing text.\n\ |
5e05d0a5 RS |
5311 | The value should be one of `overwrite-mode-textual',\n\ |
5312 | `overwrite-mode-binary', or nil.\n\ | |
5313 | If it is `overwrite-mode-textual', self-insertion still\n\ | |
6bbb0d4a | 5314 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
2e94b813 | 5315 | until the tab is filled in.\n\ |
6bbb0d4a | 5316 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
1ab256cb RM |
5317 | Automatically becomes buffer-local when set in any fashion."); |
5318 | ||
54939090 RS |
5319 | #if 0 /* The doc string is too long for some compilers, |
5320 | but make-docfile can find it in this comment. */ | |
1ab256cb | 5321 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
5d305367 | 5322 | Qnil, |
1ab256cb RM |
5323 | "Display table that controls display of the contents of current buffer.\n\ |
5324 | Automatically becomes buffer-local when set in any fashion.\n\ | |
9948db79 EZ |
5325 | \n\ |
5326 | If this variable is nil, the value of `standard-display-table' is used.\n\ | |
5327 | Each window can have its own, overriding display table, see\n\ | |
36b40a8a | 5328 | `set-window-display-table' and `window-display-table'.\n\ |
9948db79 | 5329 | \n\ |
6fdc249f | 5330 | The display table is a char-table created with `make-display-table'.\n\ |
9948db79 EZ |
5331 | A char-table is an array indexed by character codes. Normal array\n\ |
5332 | primitives `aref' and `aset' can be used to access elements of a char-table.\n\ | |
5333 | \n\ | |
5334 | Each of the char-table elements control how to display the corresponding\n\ | |
5335 | text character: the element at index C in the table says how to display\n\ | |
5336 | the character whose code is C. Each element should be a vector of\n\ | |
5337 | characters or nil. nil means display the character in the default fashion;\n\ | |
5338 | otherwise, the characters from the vector are delivered to the screen\n\ | |
5339 | instead of the original character.\n\ | |
5340 | \n\ | |
5341 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display\n\ | |
5342 | a capital Y instead of each X character.\n\ | |
5343 | \n\ | |
5344 | In addition, a char-table has six extra slots to control the display of:\n\ | |
5345 | \n\ | |
6fdc249f EN |
5346 | the end of a truncated screen line (extra-slot 0, a single character);\n\ |
5347 | the end of a continued line (extra-slot 1, a single character);\n\ | |
6158b3b0 | 5348 | the escape character used to display character codes in octal\n\ |
6fdc249f EN |
5349 | (extra-slot 2, a single character);\n\ |
5350 | the character used as an arrow for control characters (extra-slot 3,\n\ | |
6158b3b0 | 5351 | a single character);\n\ |
6fdc249f | 5352 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
a45e35e1 JB |
5353 | a vector of characters);\n\ |
5354 | the character used to draw the border between side-by-side windows\n\ | |
6fdc249f | 5355 | (extra-slot 5, a single character).\n\ |
9948db79 EZ |
5356 | \n\ |
5357 | See also the functions `display-table-slot' and `set-display-table-slot'."); | |
54939090 RS |
5358 | #endif |
5359 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, | |
de15914a | 5360 | Qnil, 0); |
1ab256cb | 5361 | |
0552666b GM |
5362 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
5363 | Qnil, | |
5364 | "*Width of left marginal area for display of a buffer.\n\ | |
5365 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5366 | A value of nil means no marginal area."); | |
5367 | ||
5368 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
5369 | Qnil, | |
5370 | "*Width of right marginal area for display of a buffer.\n\ | |
5371 | Automatically becomes buffer-local when set in any fashion.\n\ | |
5372 | A value of nil means no marginal area."); | |
5373 | ||
5374 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
5375 | ¤t_buffer->indicate_empty_lines, Qnil, | |
9d1ee976 GM |
5376 | "*Visually indicate empty lines after the buffer end.\n\ |
5377 | If non-nil, a bitmap is displayed in the left fringe of a window on\n\ | |
5378 | window-systems.\n\ | |
0552666b GM |
5379 | Automatically becomes buffer-local when set in any fashion.\n"); |
5380 | ||
5381 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
5382 | ¤t_buffer->scroll_up_aggressively, Qnil, | |
5383 | "*If a number, scroll display up aggressively.\n\ | |
5384 | If scrolling a window because point is above the window start, choose\n\ | |
5385 | a new window start so that point ends up that fraction of the window's\n\ | |
9b47cfe0 | 5386 | height from the top of the window.\n\ |
0552666b GM |
5387 | Automatically becomes buffer-local when set in any fashion."); |
5388 | ||
5389 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
5390 | ¤t_buffer->scroll_down_aggressively, Qnil, | |
5391 | "*If a number, scroll display down aggressively.\n\ | |
5392 | If scrolling a window because point is below the window end, choose\n\ | |
5393 | a new window start so that point ends up that fraction of the window's\n\ | |
9b47cfe0 | 5394 | height from the bottom of the window.\n\ |
0552666b GM |
5395 | Automatically becomes buffer-local when set in any fashion."); |
5396 | ||
1ab256cb RM |
5397 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5398 | "Don't ask."); | |
5399 | */ | |
1ab256cb | 5400 | |
5f079267 RS |
5401 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5402 | "List of functions to call before each text change.\n\ | |
5403 | Two arguments are passed to each function: the positions of\n\ | |
5404 | the beginning and end of the range of old text to be changed.\n\ | |
5405 | \(For an insertion, the beginning and end are at the same place.)\n\ | |
5406 | No information is given about the length of the text after the change.\n\ | |
5f079267 RS |
5407 | \n\ |
5408 | Buffer changes made while executing the `before-change-functions'\n\ | |
b86344d0 RS |
5409 | don't call any before-change or after-change functions.\n\ |
5410 | That's because these variables are temporarily set to nil.\n\ | |
5411 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
5412 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
5413 | accomplishing an equivalent result by using other variables.\n\ |
5414 | \n\ | |
5415 | If an unhandled error happens in running these functions,\n\ | |
5416 | the variable's value remains nil. That prevents the error\n\ | |
5417 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
5418 | Vbefore_change_functions = Qnil; |
5419 | ||
5420 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, | |
5421 | "List of function to call after each text change.\n\ | |
5422 | Three arguments are passed to each function: the positions of\n\ | |
5423 | the beginning and end of the range of changed text,\n\ | |
839dd834 | 5424 | and the length in bytes of the pre-change text replaced by that range.\n\ |
5f079267 | 5425 | \(For an insertion, the pre-change length is zero;\n\ |
839dd834 | 5426 | for a deletion, that length is the number of bytes deleted,\n\ |
5f079267 RS |
5427 | and the post-change beginning and end are at the same place.)\n\ |
5428 | \n\ | |
5429 | Buffer changes made while executing the `after-change-functions'\n\ | |
b86344d0 RS |
5430 | don't call any before-change or after-change functions.\n\ |
5431 | That's because these variables are temporarily set to nil.\n\ | |
5432 | As a result, a hook function cannot straightforwardly alter the value of\n\ | |
5433 | these variables. See the Emacs Lisp manual for a way of\n\ | |
9ebc22d4 RS |
5434 | accomplishing an equivalent result by using other variables.\n\ |
5435 | \n\ | |
5436 | If an unhandled error happens in running these functions,\n\ | |
5437 | the variable's value remains nil. That prevents the error\n\ | |
5438 | from happening repeatedly and making Emacs nonfunctional."); | |
5f079267 RS |
5439 | Vafter_change_functions = Qnil; |
5440 | ||
dbc4e1c1 JB |
5441 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
5442 | "A list of functions to call before changing a buffer which is unmodified.\n\ | |
5443 | The functions are run using the `run-hooks' function."); | |
5444 | Vfirst_change_hook = Qnil; | |
1ab256cb | 5445 | |
54939090 RS |
5446 | #if 0 /* The doc string is too long for some compilers, |
5447 | but make-docfile can find it in this comment. */ | |
3f5fcd47 | 5448 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
1ab256cb | 5449 | "List of undo entries in current buffer.\n\ |
3fd364db | 5450 | This variable is always local in all buffers.\n\ |
1ab256cb RM |
5451 | Recent changes come first; older changes follow newer.\n\ |
5452 | \n\ | |
630f4018 KH |
5453 | An entry (BEG . END) represents an insertion which begins at\n\ |
5454 | position BEG and ends at position END.\n\ | |
1ab256cb RM |
5455 | \n\ |
5456 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ | |
5457 | from (abs POSITION). If POSITION is positive, point was at the front\n\ | |
5458 | of the text being deleted; if negative, point was at the end.\n\ | |
5459 | \n\ | |
6c0df54a RS |
5460 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
5461 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ | |
5462 | of the visited file's modification time, as of that time. If the\n\ | |
5463 | modification time of the most recent save is different, this entry is\n\ | |
1ab256cb RM |
5464 | obsolete.\n\ |
5465 | \n\ | |
6c0df54a RS |
5466 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
5467 | was modified between BEG and END. PROPERTY is the property name,\n\ | |
5468 | and VALUE is the old value.\n\ | |
483c1fd3 | 5469 | \n\ |
da1c183c RS |
5470 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
5471 | was adjusted in position by the offset DISTANCE (an integer).\n\ | |
5472 | \n\ | |
bec44fd6 JB |
5473 | An entry of the form POSITION indicates that point was at the buffer\n\ |
5474 | location given by the integer. Undoing an entry of this form places\n\ | |
5475 | point at POSITION.\n\ | |
5476 | \n\ | |
1ab256cb RM |
5477 | nil marks undo boundaries. The undo command treats the changes\n\ |
5478 | between two undo boundaries as a single step to be undone.\n\ | |
5479 | \n\ | |
bec44fd6 | 5480 | If the value of the variable is t, undo information is not recorded."); |
54939090 RS |
5481 | #endif |
5482 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, | |
de15914a | 5483 | 0); |
1ab256cb | 5484 | |
c48f61ef RS |
5485 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5486 | "Non-nil means the mark and region are currently active in this buffer.\n\ | |
5487 | Automatically local in all buffers."); | |
5488 | ||
28e969dd | 5489 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
f0c5b712 JB |
5490 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
5491 | This variable is buffer-local, in all buffers.\n\ | |
28e969dd | 5492 | \n\ |
f0c5b712 JB |
5493 | Normally, the line-motion functions work by scanning the buffer for\n\ |
5494 | newlines. Columnar operations (like move-to-column and\n\ | |
5495 | compute-motion) also work by scanning the buffer, summing character\n\ | |
5496 | widths as they go. This works well for ordinary text, but if the\n\ | |
28e969dd | 5497 | buffer's lines are very long (say, more than 500 characters), these\n\ |
f0c5b712 JB |
5498 | motion functions will take longer to execute. Emacs may also take\n\ |
5499 | longer to update the display.\n\ | |
28e969dd | 5500 | \n\ |
f0c5b712 JB |
5501 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
5502 | results of their scans, and consult the cache to avoid rescanning\n\ | |
5503 | regions of the buffer until the text is modified. The caches are most\n\ | |
5504 | beneficial when they prevent the most searching---that is, when the\n\ | |
5505 | buffer contains long lines and large regions of characters with the\n\ | |
5506 | same, fixed screen width.\n\ | |
28e969dd | 5507 | \n\ |
f0c5b712 JB |
5508 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
5509 | become slightly slower (because of the overhead of consulting the\n\ | |
5510 | cache), and the caches will use memory roughly proportional to the\n\ | |
5511 | number of newlines and characters whose screen width varies.\n\ | |
5512 | \n\ | |
5513 | The caches require no explicit maintenance; their accuracy is\n\ | |
5514 | maintained internally by the Emacs primitives. Enabling or disabling\n\ | |
5515 | the cache should not affect the behavior of any of the motion\n\ | |
5516 | functions; it should only affect their performance."); | |
28e969dd | 5517 | |
943e065b | 5518 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
3fd364db RS |
5519 | "Value of point before the last series of scroll operations, or nil.\n\ |
5520 | This variable is always local in all buffers."); | |
943e065b | 5521 | |
be9aafdd BG |
5522 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5523 | "List of formats to use when saving this buffer.\n\ | |
3fd364db | 5524 | This variable is always local in all buffers.\n\ |
be9aafdd BG |
5525 | Formats are defined by `format-alist'. This variable is\n\ |
5526 | set when a file is visited. Automatically local in all buffers."); | |
5527 | ||
3cb719bd RS |
5528 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
5529 | ¤t_buffer->invisibility_spec, Qnil, | |
5530 | "Invisibility spec of this buffer.\n\ | |
3fd364db | 5531 | This variable is always local in all buffers.\n\ |
3cb719bd RS |
5532 | The default is t, which means that text is invisible\n\ |
5533 | if it has a non-nil `invisible' property.\n\ | |
5534 | If the value is a list, a text character is invisible if its `invisible'\n\ | |
5535 | property is an element in that list.\n\ | |
554216ad KH |
5536 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
5537 | then characters with property value PROP are invisible,\n\ | |
3cb719bd RS |
5538 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
5539 | ||
7962a441 RS |
5540 | DEFVAR_PER_BUFFER ("buffer-display-count", |
5541 | ¤t_buffer->display_count, Qnil, | |
3fd364db RS |
5542 | "A number incremented each time this buffer is displayed in a window.\n\ |
5543 | This variable is always local in all buffers.\n\ | |
5544 | The function `set-window-buffer increments it."); | |
5545 | ||
5546 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
5547 | ¤t_buffer->display_time, Qnil, | |
5548 | "Time stamp updated each time this buffer is displayed in a window.\n\ | |
5549 | This variable is always local in all buffers.\n\ | |
5550 | The function `set-window-buffer' updates this variable\n\ | |
5551 | to the value obtained by calling `current-time'.\n\ | |
5552 | If the buffer has never been shown in a window, the value is nil."); | |
7962a441 | 5553 | |
c48f61ef | 5554 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
319c537c RS |
5555 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
5556 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ | |
5557 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ | |
5558 | all windows or just the selected window."); | |
c48f61ef RS |
5559 | Vtransient_mark_mode = Qnil; |
5560 | ||
0a4469c9 | 5561 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
a96b68f1 RS |
5562 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
5563 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ | |
5564 | text properties. If the value is a list, disregard `buffer-read-only'\n\ | |
5565 | and disregard a `read-only' text property if the property value\n\ | |
5566 | is a member of the list."); | |
5567 | Vinhibit_read_only = Qnil; | |
5568 | ||
bb2ec976 GM |
5569 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
5570 | "Cursor to use in window displaying this buffer.\n\ | |
5571 | Values are interpreted as follows:\n\ | |
5572 | \n\ | |
5573 | t use the cursor specified for the frame\n\ | |
5574 | nil don't display a cursor\n\ | |
5575 | `bar' display a bar cursor with default width\n\ | |
5576 | (bar . WIDTH) display a bar cursor with width WIDTH\n\ | |
5577 | others display a box cursor."); | |
5578 | ||
a3bbced0 GM |
5579 | DEFVAR_PER_BUFFER ("line-spacing", |
5580 | ¤t_buffer->extra_line_spacing, Qnil, | |
5581 | "Additional space to put between lines when displaying a buffer.\n\ | |
5582 | The space is measured in pixels, and put below lines on window systems."); | |
5583 | ||
dcdffbf6 RS |
5584 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
5585 | "List of functions called with no args to query before killing a buffer."); | |
5586 | Vkill_buffer_query_functions = Qnil; | |
5587 | ||
0dc88e60 | 5588 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5589 | defsubr (&Sbuffer_list); |
5590 | defsubr (&Sget_buffer); | |
5591 | defsubr (&Sget_file_buffer); | |
5592 | defsubr (&Sget_buffer_create); | |
336cd056 | 5593 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5594 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5595 | defsubr (&Sbuffer_name); |
5596 | /*defsubr (&Sbuffer_number);*/ | |
5597 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5598 | defsubr (&Sbuffer_base_buffer); |
1ab256cb RM |
5599 | defsubr (&Sbuffer_local_variables); |
5600 | defsubr (&Sbuffer_modified_p); | |
5601 | defsubr (&Sset_buffer_modified_p); | |
5602 | defsubr (&Sbuffer_modified_tick); | |
5603 | defsubr (&Srename_buffer); | |
5604 | defsubr (&Sother_buffer); | |
5605 | defsubr (&Sbuffer_disable_undo); | |
5606 | defsubr (&Sbuffer_enable_undo); | |
5607 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5608 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5609 | defsubr (&Sswitch_to_buffer); |
5610 | defsubr (&Spop_to_buffer); | |
5611 | defsubr (&Scurrent_buffer); | |
5612 | defsubr (&Sset_buffer); | |
5613 | defsubr (&Sbarf_if_buffer_read_only); | |
5614 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5615 | defsubr (&Serase_buffer); |
5616 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5617 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5618 | |
52f8ec73 | 5619 | defsubr (&Soverlayp); |
2eec3b4e RS |
5620 | defsubr (&Smake_overlay); |
5621 | defsubr (&Sdelete_overlay); | |
5622 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5623 | defsubr (&Soverlay_start); |
5624 | defsubr (&Soverlay_end); | |
5625 | defsubr (&Soverlay_buffer); | |
5626 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5627 | defsubr (&Soverlays_at); |
74514898 | 5628 | defsubr (&Soverlays_in); |
2eec3b4e | 5629 | defsubr (&Snext_overlay_change); |
239c932b | 5630 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
5631 | defsubr (&Soverlay_recenter); |
5632 | defsubr (&Soverlay_lists); | |
5633 | defsubr (&Soverlay_get); | |
5634 | defsubr (&Soverlay_put); | |
a8c21b48 | 5635 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
5636 | } |
5637 | ||
dfcf069d | 5638 | void |
1ab256cb RM |
5639 | keys_of_buffer () |
5640 | { | |
5641 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
5642 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
5643 | |
5644 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
5645 | initialized when that function gets called. */ | |
5646 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 5647 | } |