Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
08327b22 | 2 | Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 2002 |
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 | |
7ee72033 | 42 | |
1ab256cb | 43 | #include "lisp.h" |
21cf4cf8 | 44 | #include "intervals.h" |
1ab256cb RM |
45 | #include "window.h" |
46 | #include "commands.h" | |
47 | #include "buffer.h" | |
3b06f880 | 48 | #include "charset.h" |
28e969dd | 49 | #include "region-cache.h" |
1ab256cb | 50 | #include "indent.h" |
d014bf88 | 51 | #include "blockinput.h" |
2538fae4 | 52 | #include "keyboard.h" |
e35f6ff7 | 53 | #include "keymap.h" |
08460cd4 | 54 | #include "frame.h" |
1ab256cb RM |
55 | |
56 | struct buffer *current_buffer; /* the current buffer */ | |
57 | ||
58 | /* First buffer in chain of all buffers (in reverse order of creation). | |
59 | Threaded through ->next. */ | |
60 | ||
61 | struct buffer *all_buffers; | |
62 | ||
63 | /* This structure holds the default values of the buffer-local variables | |
64 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
65 | The default value occupies the same slot in this structure | |
66 | as an individual buffer's value occupies in that buffer. | |
67 | Setting the default value also goes through the alist of buffers | |
68 | and stores into each buffer that does not say it has a local value. */ | |
69 | ||
70 | struct buffer buffer_defaults; | |
71 | ||
72 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
73 | ||
74 | static Lisp_Object Vbuffer_defaults; | |
75 | ||
76 | /* This structure marks which slots in a buffer have corresponding | |
77 | default values in buffer_defaults. | |
78 | Each such slot has a nonzero value in this structure. | |
79 | The value has only one nonzero bit. | |
80 | ||
81 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
82 | the entry for that slot (found in the same slot in this structure) |
83 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
84 | |
85 | If a slot in this structure is -1, then even though there may | |
86 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
87 | and the corresponding slot in buffer_defaults is not used. | |
88 | ||
89 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
90 | but there is a default value which is copied into each buffer. | |
91 | ||
92 | If a slot in this structure is negative, then even though there may | |
93 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
94 | and the corresponding slot in buffer_defaults is not used. | |
95 | ||
96 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is | |
97 | zero, that is a bug */ | |
98 | ||
99 | struct buffer buffer_local_flags; | |
100 | ||
101 | /* This structure holds the names of symbols whose values may be | |
102 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
103 | ||
104 | struct buffer buffer_local_symbols; | |
105 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
106 | static Lisp_Object Vbuffer_local_symbols; | |
107 | ||
0fa3ba92 JB |
108 | /* This structure holds the required types for the values in the |
109 | buffer-local slots. If a slot contains Qnil, then the | |
110 | corresponding buffer slot may contain a value of any type. If a | |
111 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
112 | equal to that integer (except nil is always allowed). |
113 | When a tag does not match, the function | |
114 | buffer_slot_type_mismatch will signal an error. | |
115 | ||
116 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
117 | struct buffer buffer_local_types; |
118 | ||
13de9290 RS |
119 | /* Flags indicating which built-in buffer-local variables |
120 | are permanent locals. */ | |
7313acd0 | 121 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
122 | |
123 | /* Number of per-buffer variables used. */ | |
124 | ||
7313acd0 | 125 | int last_per_buffer_idx; |
13de9290 | 126 | |
1ab256cb | 127 | Lisp_Object Fset_buffer (); |
01050cb5 | 128 | void set_buffer_internal (); |
c7aa5005 | 129 | void set_buffer_internal_1 (); |
173f2a64 | 130 | static void call_overlay_mod_hooks (); |
2f3f993b | 131 | static void swap_out_buffer_local_variables (); |
13de9290 | 132 | static void reset_buffer_local_variables (); |
1ab256cb RM |
133 | |
134 | /* Alist of all buffer names vs the buffers. */ | |
135 | /* This used to be a variable, but is no longer, | |
136 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
137 | Lisp_Object Vbuffer_alist; | |
138 | ||
139 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
140 | Lisp_Object Vbefore_change_functions; |
141 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 142 | |
c48f61ef RS |
143 | Lisp_Object Vtransient_mark_mode; |
144 | ||
a96b68f1 RS |
145 | /* t means ignore all read-only text properties. |
146 | A list means ignore such a property if its value is a member of the list. | |
147 | Any non-nil value means ignore buffer-read-only. */ | |
148 | Lisp_Object Vinhibit_read_only; | |
149 | ||
dcdffbf6 RS |
150 | /* List of functions to call that can query about killing a buffer. |
151 | If any of these functions returns nil, we don't kill it. */ | |
152 | Lisp_Object Vkill_buffer_query_functions; | |
153 | ||
dbc4e1c1 JB |
154 | /* List of functions to call before changing an unmodified buffer. */ |
155 | Lisp_Object Vfirst_change_hook; | |
22378665 | 156 | |
dbc4e1c1 | 157 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
158 | Lisp_Object Qbefore_change_functions; |
159 | Lisp_Object Qafter_change_functions; | |
48265e61 | 160 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 161 | |
7775635d KH |
162 | /* If nonzero, all modification hooks are suppressed. */ |
163 | int inhibit_modification_hooks; | |
164 | ||
1ab256cb RM |
165 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
166 | ||
167 | Lisp_Object Qprotected_field; | |
168 | ||
169 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
170 | ||
171 | Lisp_Object Qkill_buffer_hook; | |
172 | ||
5fe0b67e RS |
173 | Lisp_Object Qget_file_buffer; |
174 | ||
52f8ec73 JB |
175 | Lisp_Object Qoverlayp; |
176 | ||
bbbe9545 | 177 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 178 | |
294d215f RS |
179 | Lisp_Object Qmodification_hooks; |
180 | Lisp_Object Qinsert_in_front_hooks; | |
181 | Lisp_Object Qinsert_behind_hooks; | |
182 | ||
b86af064 GM |
183 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
184 | static void free_buffer_text P_ ((struct buffer *b)); | |
04e4cb3a | 185 | static Lisp_Object copy_overlays P_ ((struct buffer *, Lisp_Object)); |
26f545d7 | 186 | static void modify_overlay P_ ((struct buffer *, int, int)); |
b86af064 GM |
187 | |
188 | ||
1ab256cb RM |
189 | /* For debugging; temporary. See set_buffer_internal. */ |
190 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
191 | ||
01136e9b | 192 | void |
1ab256cb RM |
193 | nsberror (spec) |
194 | Lisp_Object spec; | |
195 | { | |
a7a60ce9 | 196 | if (STRINGP (spec)) |
d5db4077 | 197 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
198 | error ("Invalid buffer argument"); |
199 | } | |
200 | \f | |
0dc88e60 | 201 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
202 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
203 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
204 | (object) | |
0dc88e60 RS |
205 | Lisp_Object object; |
206 | { | |
207 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
208 | ? Qt : Qnil); | |
209 | } | |
210 | ||
08460cd4 | 211 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 212 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
213 | If the optional arg FRAME is a frame, we return the buffer list |
214 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
215 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 216 | (frame) |
08460cd4 | 217 | Lisp_Object frame; |
1ab256cb | 218 | { |
08460cd4 RS |
219 | Lisp_Object framelist, general; |
220 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
221 | ||
222 | if (FRAMEP (frame)) | |
223 | { | |
224 | Lisp_Object tail; | |
225 | ||
b7826503 | 226 | CHECK_FRAME (frame); |
08460cd4 RS |
227 | |
228 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
229 | ||
230 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
231 | tail = framelist; | |
232 | while (! NILP (tail)) | |
233 | { | |
7539e11f KR |
234 | general = Fdelq (XCAR (tail), general); |
235 | tail = XCDR (tail); | |
08460cd4 RS |
236 | } |
237 | return nconc2 (framelist, general); | |
238 | } | |
239 | ||
240 | return general; | |
1ab256cb RM |
241 | } |
242 | ||
04ae1b48 RS |
243 | /* Like Fassoc, but use Fstring_equal to compare |
244 | (which ignores text properties), | |
245 | and don't ever QUIT. */ | |
246 | ||
247 | static Lisp_Object | |
248 | assoc_ignore_text_properties (key, list) | |
249 | register Lisp_Object key; | |
250 | Lisp_Object list; | |
251 | { | |
252 | register Lisp_Object tail; | |
6d70a280 | 253 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
254 | { |
255 | register Lisp_Object elt, tem; | |
6d70a280 | 256 | elt = XCAR (tail); |
04ae1b48 RS |
257 | tem = Fstring_equal (Fcar (elt), key); |
258 | if (!NILP (tem)) | |
259 | return elt; | |
260 | } | |
261 | return Qnil; | |
262 | } | |
263 | ||
1ab256cb | 264 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 265 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 266 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
267 | NAME may also be a buffer; if so, the value is that buffer. */) |
268 | (name) | |
1ab256cb RM |
269 | register Lisp_Object name; |
270 | { | |
a7a60ce9 | 271 | if (BUFFERP (name)) |
1ab256cb | 272 | return name; |
b7826503 | 273 | CHECK_STRING (name); |
1ab256cb | 274 | |
04ae1b48 | 275 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
276 | } |
277 | ||
278 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 279 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
280 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
281 | If there is no such live buffer, return nil. | |
7ee72033 MB |
282 | See also `find-buffer-visiting'. */) |
283 | (filename) | |
1ab256cb RM |
284 | register Lisp_Object filename; |
285 | { | |
286 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
287 | Lisp_Object handler; |
288 | ||
b7826503 | 289 | CHECK_STRING (filename); |
1ab256cb RM |
290 | filename = Fexpand_file_name (filename, Qnil); |
291 | ||
5fe0b67e RS |
292 | /* If the file name has special constructs in it, |
293 | call the corresponding file handler. */ | |
a617e913 | 294 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
295 | if (!NILP (handler)) |
296 | return call2 (handler, Qget_file_buffer, filename); | |
297 | ||
7539e11f | 298 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 299 | { |
7539e11f | 300 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
301 | if (!BUFFERP (buf)) continue; |
302 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 303 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 304 | if (!NILP (tem)) |
1ab256cb RM |
305 | return buf; |
306 | } | |
307 | return Qnil; | |
308 | } | |
309 | ||
52e01189 RS |
310 | Lisp_Object |
311 | get_truename_buffer (filename) | |
312 | register Lisp_Object filename; | |
313 | { | |
314 | register Lisp_Object tail, buf, tem; | |
315 | ||
7539e11f | 316 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 317 | { |
7539e11f | 318 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
319 | if (!BUFFERP (buf)) continue; |
320 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
321 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
322 | if (!NILP (tem)) | |
323 | return buf; | |
324 | } | |
325 | return Qnil; | |
326 | } | |
327 | ||
1ab256cb RM |
328 | /* Incremented for each buffer created, to assign the buffer number. */ |
329 | int buffer_count; | |
330 | ||
331 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 332 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
333 | A new buffer is created if there is no live buffer named NAME. |
334 | If NAME starts with a space, the new buffer does not keep undo information. | |
335 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
336 | The value is never nil. */) |
337 | (name) | |
1ab256cb RM |
338 | register Lisp_Object name; |
339 | { | |
a9ee7a59 | 340 | register Lisp_Object buf; |
1ab256cb RM |
341 | register struct buffer *b; |
342 | ||
343 | buf = Fget_buffer (name); | |
265a9e55 | 344 | if (!NILP (buf)) |
1ab256cb RM |
345 | return buf; |
346 | ||
d5db4077 | 347 | if (SCHARS (name) == 0) |
31cd83e9 KH |
348 | error ("Empty string for buffer name is not allowed"); |
349 | ||
a21260d9 | 350 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 351 | |
336cd056 RS |
352 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
353 | ||
354 | /* An ordinary buffer uses its own struct buffer_text. */ | |
355 | b->text = &b->own_text; | |
356 | b->base_buffer = 0; | |
357 | ||
1ab256cb | 358 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 359 | BLOCK_INPUT; |
3b06f880 KH |
360 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
361 | anchoring a search. */ | |
b86af064 | 362 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 363 | UNBLOCK_INPUT; |
1ab256cb | 364 | if (! BUF_BEG_ADDR (b)) |
81841847 | 365 | buffer_memory_full (); |
1ab256cb | 366 | |
6d70a280 SM |
367 | BUF_PT (b) = BEG; |
368 | BUF_GPT (b) = BEG; | |
369 | BUF_BEGV (b) = BEG; | |
370 | BUF_ZV (b) = BEG; | |
371 | BUF_Z (b) = BEG; | |
372 | BUF_PT_BYTE (b) = BEG_BYTE; | |
373 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
374 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
375 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
376 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 377 | BUF_MODIFF (b) = 1; |
2509d356 | 378 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
379 | BUF_SAVE_MODIFF (b) = 1; |
380 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
381 | BUF_UNCHANGED_MODIFIED (b) = 1; |
382 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
383 | BUF_END_UNCHANGED (b) = 0; | |
384 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 385 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 386 | |
28e969dd JB |
387 | b->newline_cache = 0; |
388 | b->width_run_cache = 0; | |
389 | b->width_table = Qnil; | |
b5a225b4 | 390 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 391 | |
1ab256cb RM |
392 | /* Put this on the chain of all buffers including killed ones. */ |
393 | b->next = all_buffers; | |
394 | all_buffers = b; | |
395 | ||
336cd056 RS |
396 | /* An ordinary buffer normally doesn't need markers |
397 | to handle BEGV and ZV. */ | |
398 | b->pt_marker = Qnil; | |
399 | b->begv_marker = Qnil; | |
400 | b->zv_marker = Qnil; | |
04ae1b48 RS |
401 | |
402 | name = Fcopy_sequence (name); | |
ab77f05c | 403 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 404 | b->name = name; |
04ae1b48 | 405 | |
d5db4077 | 406 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
407 | b->undo_list = Qnil; |
408 | else | |
409 | b->undo_list = Qt; | |
410 | ||
411 | reset_buffer (b); | |
13de9290 | 412 | reset_buffer_local_variables (b, 1); |
1ab256cb | 413 | |
1f57cb74 RS |
414 | b->mark = Fmake_marker (); |
415 | BUF_MARKERS (b) = Qnil; | |
416 | b->name = name; | |
417 | ||
1ab256cb | 418 | /* Put this in the alist of all live buffers. */ |
67180c6a | 419 | XSETBUFFER (buf, b); |
1ab256cb RM |
420 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
421 | ||
48265e61 DL |
422 | /* Fixme: Protect against errors, which would trigger infinite |
423 | regress? */ | |
424 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) | |
425 | /* buff is on buffer-alist, so no gcpro */ | |
426 | call1 (Qucs_set_table_for_input, buf); | |
427 | ||
336cd056 RS |
428 | return buf; |
429 | } | |
430 | ||
7e9d5818 | 431 | |
04e4cb3a GM |
432 | /* Return a list of overlays which is a copy of the overlay list |
433 | LIST, but for buffer B. */ | |
434 | ||
435 | static Lisp_Object | |
436 | copy_overlays (b, list) | |
437 | struct buffer *b; | |
438 | Lisp_Object list; | |
439 | { | |
440 | Lisp_Object result, buffer; | |
441 | ||
442 | XSETBUFFER (buffer, b); | |
443 | ||
444 | for (result = Qnil; CONSP (list); list = XCDR (list)) | |
445 | { | |
446 | Lisp_Object overlay, start, end, old_overlay; | |
447 | int charpos; | |
448 | ||
449 | old_overlay = XCAR (list); | |
450 | charpos = marker_position (OVERLAY_START (old_overlay)); | |
451 | start = Fmake_marker (); | |
db3a49a6 | 452 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
453 | XMARKER (start)->insertion_type |
454 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
455 | ||
456 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
457 | end = Fmake_marker (); | |
db3a49a6 | 458 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
459 | XMARKER (end)->insertion_type |
460 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
461 | ||
462 | overlay = allocate_misc (); | |
463 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
464 | OVERLAY_START (overlay) = start; | |
465 | OVERLAY_END (overlay) = end; | |
466 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
467 | ||
468 | result = Fcons (overlay, result); | |
469 | } | |
470 | ||
471 | return Fnreverse (result); | |
472 | } | |
473 | ||
474 | ||
7e9d5818 GM |
475 | /* Clone per-buffer values of buffer FROM. |
476 | ||
477 | Buffer TO gets the same per-buffer values as FROM, with the | |
478 | following exceptions: (1) TO's name is left untouched, (2) markers | |
479 | are copied and made to refer to TO, and (3) overlay lists are | |
480 | copied. */ | |
481 | ||
482 | static void | |
483 | clone_per_buffer_values (from, to) | |
484 | struct buffer *from, *to; | |
485 | { | |
486 | Lisp_Object to_buffer; | |
487 | int offset; | |
488 | ||
489 | XSETBUFFER (to_buffer, to); | |
490 | ||
491 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); | |
492 | offset < sizeof *to; | |
493 | offset += sizeof (Lisp_Object)) | |
494 | { | |
495 | Lisp_Object obj; | |
496 | ||
497 | obj = PER_BUFFER_VALUE (from, offset); | |
498 | if (MARKERP (obj)) | |
499 | { | |
500 | struct Lisp_Marker *m = XMARKER (obj); | |
501 | obj = Fmake_marker (); | |
502 | XMARKER (obj)->insertion_type = m->insertion_type; | |
503 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
504 | } | |
505 | ||
506 | PER_BUFFER_VALUE (to, offset) = obj; | |
507 | } | |
508 | ||
7e9d5818 | 509 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
04e4cb3a GM |
510 | |
511 | to->overlays_before = copy_overlays (to, from->overlays_before); | |
512 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
7e9d5818 GM |
513 | } |
514 | ||
515 | ||
516 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, | |
517 | 2, 3, | |
193c3837 | 518 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 519 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
018ba359 PJ |
520 | BASE-BUFFER should be an existing buffer (or buffer name). |
521 | NAME should be a string which is not the name of an existing buffer. | |
522 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
523 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
524 | CLONE nil means the indirect buffer's state is reset to default values. */) |
525 | (base_buffer, name, clone) | |
7e9d5818 | 526 | Lisp_Object base_buffer, name, clone; |
336cd056 | 527 | { |
7e9d5818 GM |
528 | Lisp_Object buf; |
529 | struct buffer *b; | |
336cd056 RS |
530 | |
531 | buf = Fget_buffer (name); | |
532 | if (!NILP (buf)) | |
d5db4077 | 533 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 RS |
534 | |
535 | base_buffer = Fget_buffer (base_buffer); | |
536 | if (NILP (base_buffer)) | |
d5db4077 | 537 | error ("No such buffer: `%s'", SDATA (name)); |
336cd056 | 538 | |
d5db4077 | 539 | if (SCHARS (name) == 0) |
336cd056 RS |
540 | error ("Empty string for buffer name is not allowed"); |
541 | ||
a21260d9 | 542 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
543 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
544 | ||
545 | if (XBUFFER (base_buffer)->base_buffer) | |
546 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
547 | else | |
548 | b->base_buffer = XBUFFER (base_buffer); | |
549 | ||
550 | /* Use the base buffer's text object. */ | |
551 | b->text = b->base_buffer->text; | |
552 | ||
553 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
554 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
555 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
556 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
557 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
558 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
559 | |
560 | b->newline_cache = 0; | |
561 | b->width_run_cache = 0; | |
562 | b->width_table = Qnil; | |
563 | ||
564 | /* Put this on the chain of all buffers including killed ones. */ | |
565 | b->next = all_buffers; | |
566 | all_buffers = b; | |
567 | ||
568 | name = Fcopy_sequence (name); | |
ab77f05c | 569 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
570 | b->name = name; |
571 | ||
572 | reset_buffer (b); | |
13de9290 | 573 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
574 | |
575 | /* Put this in the alist of all live buffers. */ | |
576 | XSETBUFFER (buf, b); | |
577 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
578 | ||
579 | b->mark = Fmake_marker (); | |
1ab256cb | 580 | b->name = name; |
336cd056 | 581 | |
abc9d959 RS |
582 | /* The multibyte status belongs to the base buffer. */ |
583 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
584 | ||
336cd056 RS |
585 | /* Make sure the base buffer has markers for its narrowing. */ |
586 | if (NILP (b->base_buffer->pt_marker)) | |
587 | { | |
588 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
589 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
590 | BUF_PT (b->base_buffer), | |
591 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
592 | } |
593 | if (NILP (b->base_buffer->begv_marker)) | |
594 | { | |
595 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
596 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
597 | BUF_BEGV (b->base_buffer), | |
598 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
599 | } |
600 | if (NILP (b->base_buffer->zv_marker)) | |
601 | { | |
602 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
603 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
604 | BUF_ZV (b->base_buffer), | |
605 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 606 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
607 | } |
608 | ||
7e9d5818 GM |
609 | if (NILP (clone)) |
610 | { | |
611 | /* Give the indirect buffer markers for its narrowing. */ | |
612 | b->pt_marker = Fmake_marker (); | |
613 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
614 | b->begv_marker = Fmake_marker (); | |
615 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
616 | b->zv_marker = Fmake_marker (); | |
617 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
618 | XMARKER (b->zv_marker)->insertion_type = 1; | |
619 | } | |
620 | else | |
621 | clone_per_buffer_values (b->base_buffer, b); | |
336cd056 | 622 | |
a9ee7a59 | 623 | return buf; |
1ab256cb RM |
624 | } |
625 | ||
bcd40520 RS |
626 | /* Reinitialize everything about a buffer except its name and contents |
627 | and local variables. */ | |
1ab256cb RM |
628 | |
629 | void | |
630 | reset_buffer (b) | |
631 | register struct buffer *b; | |
632 | { | |
633 | b->filename = Qnil; | |
f6ed2e84 | 634 | b->file_truename = Qnil; |
1ab256cb RM |
635 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
636 | b->modtime = 0; | |
8d7a4592 | 637 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 638 | b->last_window_start = 1; |
8b264726 | 639 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
640 | b->clip_changed = 0; |
641 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
642 | b->backed_up = Qnil; |
643 | b->auto_save_modified = 0; | |
84f6bcba | 644 | b->auto_save_failure_time = -1; |
1ab256cb RM |
645 | b->auto_save_file_name = Qnil; |
646 | b->read_only = Qnil; | |
2eec3b4e RS |
647 | b->overlays_before = Qnil; |
648 | b->overlays_after = Qnil; | |
8d7a4592 | 649 | XSETFASTINT (b->overlay_center, 1); |
dfda7a7f | 650 | b->mark_active = Qnil; |
943e065b | 651 | b->point_before_scroll = Qnil; |
be9aafdd | 652 | b->file_format = Qnil; |
0dc6f165 | 653 | b->last_selected_window = Qnil; |
7962a441 | 654 | XSETINT (b->display_count, 0); |
3fd364db | 655 | b->display_time = Qnil; |
1bf08baf | 656 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 657 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 658 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
659 | |
660 | b->display_error_modiff = 0; | |
1ab256cb RM |
661 | } |
662 | ||
bcd40520 RS |
663 | /* Reset buffer B's local variables info. |
664 | Don't use this on a buffer that has already been in use; | |
665 | it does not treat permanent locals consistently. | |
13de9290 RS |
666 | Instead, use Fkill_all_local_variables. |
667 | ||
668 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
669 | buffer-local variables. If PERMANENT_TOO is 0, | |
670 | we preserve those. */ | |
bcd40520 | 671 | |
13de9290 RS |
672 | static void |
673 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 674 | register struct buffer *b; |
13de9290 | 675 | int permanent_too; |
1ab256cb RM |
676 | { |
677 | register int offset; | |
7c02e886 | 678 | int i; |
1ab256cb RM |
679 | |
680 | /* Reset the major mode to Fundamental, together with all the | |
681 | things that depend on the major mode. | |
682 | default-major-mode is handled at a higher level. | |
683 | We ignore it here. */ | |
684 | b->major_mode = Qfundamental_mode; | |
685 | b->keymap = Qnil; | |
686 | b->abbrev_table = Vfundamental_mode_abbrev_table; | |
687 | b->mode_name = QSFundamental; | |
688 | b->minor_modes = Qnil; | |
3446af9c RS |
689 | |
690 | /* If the standard case table has been altered and invalidated, | |
691 | fix up its insides first. */ | |
692 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
693 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
694 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
695 | Fset_standard_case_table (Vascii_downcase_table); | |
696 | ||
1ab256cb | 697 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
698 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
699 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
700 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 701 | b->invisibility_spec = Qt; |
2e716096 RS |
702 | #ifndef DOS_NT |
703 | b->buffer_file_type = Qnil; | |
704 | #endif | |
3cb719bd | 705 | |
13de9290 | 706 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 707 | b->local_var_alist = Qnil; |
7313acd0 | 708 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 709 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 710 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
711 | |
712 | /* For each slot that has a default value, | |
713 | copy that into the slot. */ | |
714 | ||
7313acd0 | 715 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
716 | offset < sizeof *b; |
717 | offset += sizeof (Lisp_Object)) | |
aab80822 | 718 | { |
7313acd0 | 719 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
720 | if ((idx > 0 |
721 | && (permanent_too | |
722 | || buffer_permanent_local_flags[idx] == 0)) | |
723 | /* Is -2 used anywhere? */ | |
724 | || idx == -2) | |
7313acd0 | 725 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 726 | } |
1ab256cb RM |
727 | } |
728 | ||
01050cb5 RM |
729 | /* We split this away from generate-new-buffer, because rename-buffer |
730 | and set-visited-file-name ought to be able to use this to really | |
731 | rename the buffer properly. */ | |
732 | ||
733 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 734 | 1, 2, 0, |
7ee72033 | 735 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
736 | If there is no live buffer named NAME, then return NAME. |
737 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
738 | until an unused name is found, and then return that name. | |
739 | Optional second argument IGNORE specifies a name that is okay to use | |
740 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
741 | even if a buffer with that name exists. */) |
742 | (name, ignore) | |
c273e647 | 743 | register Lisp_Object name, ignore; |
1ab256cb RM |
744 | { |
745 | register Lisp_Object gentemp, tem; | |
746 | int count; | |
747 | char number[10]; | |
748 | ||
b7826503 | 749 | CHECK_STRING (name); |
1ab256cb RM |
750 | |
751 | tem = Fget_buffer (name); | |
265a9e55 | 752 | if (NILP (tem)) |
01050cb5 | 753 | return name; |
1ab256cb RM |
754 | |
755 | count = 1; | |
756 | while (1) | |
757 | { | |
758 | sprintf (number, "<%d>", ++count); | |
759 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 760 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
761 | if (!NILP (tem)) |
762 | return gentemp; | |
1ab256cb | 763 | tem = Fget_buffer (gentemp); |
265a9e55 | 764 | if (NILP (tem)) |
01050cb5 | 765 | return gentemp; |
1ab256cb RM |
766 | } |
767 | } | |
768 | ||
769 | \f | |
770 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
771 | doc: /* Return the name of BUFFER, as a string. |
772 | With no argument or nil as argument, return the name of the current buffer. */) | |
773 | (buffer) | |
1ab256cb RM |
774 | register Lisp_Object buffer; |
775 | { | |
265a9e55 | 776 | if (NILP (buffer)) |
1ab256cb | 777 | return current_buffer->name; |
b7826503 | 778 | CHECK_BUFFER (buffer); |
1ab256cb RM |
779 | return XBUFFER (buffer)->name; |
780 | } | |
781 | ||
782 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
783 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
784 | No argument or nil as argument means use the current buffer. */) | |
785 | (buffer) | |
1ab256cb RM |
786 | register Lisp_Object buffer; |
787 | { | |
265a9e55 | 788 | if (NILP (buffer)) |
1ab256cb | 789 | return current_buffer->filename; |
b7826503 | 790 | CHECK_BUFFER (buffer); |
1ab256cb RM |
791 | return XBUFFER (buffer)->filename; |
792 | } | |
793 | ||
336cd056 RS |
794 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
795 | 0, 1, 0, | |
7ee72033 MB |
796 | doc: /* Return the base buffer of indirect buffer BUFFER. |
797 | If BUFFER is not indirect, return nil. */) | |
798 | (buffer) | |
336cd056 RS |
799 | register Lisp_Object buffer; |
800 | { | |
801 | struct buffer *base; | |
802 | Lisp_Object base_buffer; | |
803 | ||
804 | if (NILP (buffer)) | |
805 | base = current_buffer->base_buffer; | |
806 | else | |
807 | { | |
b7826503 | 808 | CHECK_BUFFER (buffer); |
336cd056 RS |
809 | base = XBUFFER (buffer)->base_buffer; |
810 | } | |
811 | ||
812 | if (! base) | |
813 | return Qnil; | |
814 | XSETBUFFER (base_buffer, base); | |
815 | return base_buffer; | |
816 | } | |
817 | ||
79aa712d RS |
818 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
819 | Sbuffer_local_value, 2, 2, 0, | |
820 | doc: /* Return the value of VARIABLE in BUFFER. | |
821 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
822 | is the default binding of variable. */) | |
823 | (symbol, buffer) | |
824 | register Lisp_Object symbol; | |
825 | register Lisp_Object buffer; | |
826 | { | |
827 | register struct buffer *buf; | |
828 | register Lisp_Object result; | |
829 | ||
ae69175b RS |
830 | CHECK_SYMBOL (symbol); |
831 | CHECK_BUFFER (buffer); | |
79aa712d RS |
832 | buf = XBUFFER (buffer); |
833 | ||
834 | /* Look in local_var_list */ | |
835 | result = Fassoc (symbol, buf->local_var_alist); | |
836 | if (NILP (result)) | |
837 | { | |
838 | int offset, idx; | |
839 | int found = 0; | |
840 | ||
841 | /* Look in special slots */ | |
842 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
843 | offset < sizeof (struct buffer); | |
844 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
845 | offset += (sizeof (EMACS_INT))) | |
846 | { | |
847 | idx = PER_BUFFER_IDX (offset); | |
848 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
849 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) | |
850 | && EQ (PER_BUFFER_SYMBOL (offset), symbol)) | |
851 | { | |
852 | result = PER_BUFFER_VALUE (buf, offset); | |
853 | found = 1; | |
854 | break; | |
855 | } | |
856 | } | |
857 | ||
858 | if (!found) | |
859 | result = Fdefault_value (symbol); | |
860 | } | |
861 | else | |
f0bac7de RS |
862 | { |
863 | Lisp_Object valcontents; | |
864 | Lisp_Object current_alist_element; | |
865 | ||
866 | /* What binding is loaded right now? */ | |
867 | valcontents = SYMBOL_VALUE (symbol); | |
868 | current_alist_element | |
869 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
870 | ||
871 | /* The value of the currently loaded binding is not | |
872 | stored in it, but rather in the realvalue slot. | |
873 | Store that value into the binding it belongs to | |
874 | in case that is the one we are about to use. */ | |
875 | ||
876 | Fsetcdr (current_alist_element, | |
877 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
878 | ||
879 | /* Now get the (perhaps updated) value out of the binding. */ | |
880 | result = XCDR (result); | |
881 | } | |
79aa712d RS |
882 | |
883 | if (EQ (result, Qunbound)) | |
884 | return Fsignal (Qvoid_variable, Fcons (symbol, Qnil)); | |
885 | ||
886 | return result; | |
887 | } | |
888 | ||
1ab256cb | 889 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 890 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 891 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
892 | Most elements look like (SYMBOL . VALUE), describing one variable. |
893 | For a symbol that is locally unbound, just the symbol appears in the value. | |
894 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
895 | No argument or nil as argument means use current buffer as BUFFER. */) |
896 | (buffer) | |
1ab256cb RM |
897 | register Lisp_Object buffer; |
898 | { | |
899 | register struct buffer *buf; | |
553defa4 | 900 | register Lisp_Object result; |
1ab256cb | 901 | |
265a9e55 | 902 | if (NILP (buffer)) |
1ab256cb RM |
903 | buf = current_buffer; |
904 | else | |
905 | { | |
b7826503 | 906 | CHECK_BUFFER (buffer); |
1ab256cb RM |
907 | buf = XBUFFER (buffer); |
908 | } | |
909 | ||
553defa4 RS |
910 | result = Qnil; |
911 | ||
1ab256cb | 912 | { |
553defa4 | 913 | register Lisp_Object tail; |
7539e11f | 914 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 915 | { |
553defa4 RS |
916 | Lisp_Object val, elt; |
917 | ||
7539e11f | 918 | elt = XCAR (tail); |
553defa4 | 919 | |
e0585c64 RS |
920 | /* Reference each variable in the alist in buf. |
921 | If inquiring about the current buffer, this gets the current values, | |
922 | so store them into the alist so the alist is up to date. | |
923 | If inquiring about some other buffer, this swaps out any values | |
924 | for that buffer, making the alist up to date automatically. */ | |
7539e11f | 925 | val = find_symbol_value (XCAR (elt)); |
e0585c64 RS |
926 | /* Use the current buffer value only if buf is the current buffer. */ |
927 | if (buf != current_buffer) | |
7539e11f | 928 | val = XCDR (elt); |
553defa4 RS |
929 | |
930 | /* If symbol is unbound, put just the symbol in the list. */ | |
931 | if (EQ (val, Qunbound)) | |
7539e11f | 932 | result = Fcons (XCAR (elt), result); |
553defa4 RS |
933 | /* Otherwise, put (symbol . value) in the list. */ |
934 | else | |
7539e11f | 935 | result = Fcons (Fcons (XCAR (elt), val), result); |
1ab256cb RM |
936 | } |
937 | } | |
938 | ||
1ab256cb RM |
939 | /* Add on all the variables stored in special slots. */ |
940 | { | |
7c02e886 | 941 | int offset, idx; |
1ab256cb | 942 | |
7313acd0 | 943 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 944 | offset < sizeof (struct buffer); |
7c02e886 GM |
945 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
946 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 947 | { |
7313acd0 GM |
948 | idx = PER_BUFFER_IDX (offset); |
949 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
950 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
951 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
952 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 953 | result); |
1ab256cb RM |
954 | } |
955 | } | |
553defa4 RS |
956 | |
957 | return result; | |
1ab256cb RM |
958 | } |
959 | ||
960 | \f | |
961 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 962 | 0, 1, 0, |
7ee72033 MB |
963 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
964 | No argument or nil as argument means use current buffer as BUFFER. */) | |
965 | (buffer) | |
1ab256cb RM |
966 | register Lisp_Object buffer; |
967 | { | |
968 | register struct buffer *buf; | |
265a9e55 | 969 | if (NILP (buffer)) |
1ab256cb RM |
970 | buf = current_buffer; |
971 | else | |
972 | { | |
b7826503 | 973 | CHECK_BUFFER (buffer); |
1ab256cb RM |
974 | buf = XBUFFER (buffer); |
975 | } | |
976 | ||
336cd056 | 977 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
978 | } |
979 | ||
980 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 981 | 1, 1, 0, |
7ee72033 MB |
982 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
983 | A non-nil FLAG means mark the buffer modified. */) | |
984 | (flag) | |
1ab256cb RM |
985 | register Lisp_Object flag; |
986 | { | |
987 | register int already; | |
988 | register Lisp_Object fn; | |
8ec01c70 | 989 | Lisp_Object buffer, window; |
1ab256cb RM |
990 | |
991 | #ifdef CLASH_DETECTION | |
992 | /* If buffer becoming modified, lock the file. | |
993 | If buffer becoming unmodified, unlock the file. */ | |
994 | ||
60f4dd23 | 995 | fn = current_buffer->file_truename; |
90d456d2 KH |
996 | /* Test buffer-file-name so that binding it to nil is effective. */ |
997 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 998 | { |
336cd056 | 999 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1000 | if (!already && !NILP (flag)) |
1ab256cb | 1001 | lock_file (fn); |
265a9e55 | 1002 | else if (already && NILP (flag)) |
1ab256cb RM |
1003 | unlock_file (fn); |
1004 | } | |
1005 | #endif /* CLASH_DETECTION */ | |
1006 | ||
336cd056 | 1007 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
8ec01c70 GM |
1008 | |
1009 | /* Set update_mode_lines only if buffer is displayed in some window. | |
1010 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1011 | state by recording/restoring the state around blocks of code. | |
1012 | Setting update_mode_lines makes redisplay consider all windows | |
1013 | (on all frames). Stealth fontification of buffers not displayed | |
1014 | would incur additional redisplay costs if we'd set | |
1015 | update_modes_lines unconditionally. | |
1016 | ||
1017 | Ideally, I think there should be another mechanism for fontifying | |
1018 | buffers without "modifying" buffers, or redisplay should be | |
1019 | smarter about updating the `*' in mode lines. --gerd */ | |
1020 | XSETBUFFER (buffer, current_buffer); | |
1021 | window = Fget_buffer_window (buffer, Qt); | |
1022 | if (WINDOWP (window)) | |
d57b83b3 GM |
1023 | { |
1024 | ++update_mode_lines; | |
1025 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1026 | } | |
8ec01c70 | 1027 | |
1ab256cb RM |
1028 | return flag; |
1029 | } | |
1030 | ||
a8c21b48 GM |
1031 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1032 | Srestore_buffer_modified_p, 1, 1, 0, | |
7ee72033 | 1033 | doc: /* Like `set-buffer-modified-p', with a differences concerning redisplay. |
018ba359 | 1034 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1035 | state of the current buffer. Use with care. */) |
1036 | (flag) | |
a8c21b48 GM |
1037 | Lisp_Object flag; |
1038 | { | |
1039 | #ifdef CLASH_DETECTION | |
1040 | Lisp_Object fn; | |
1041 | ||
1042 | /* If buffer becoming modified, lock the file. | |
1043 | If buffer becoming unmodified, unlock the file. */ | |
1044 | ||
1045 | fn = current_buffer->file_truename; | |
1046 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1047 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1048 | { | |
1049 | int already = SAVE_MODIFF < MODIFF; | |
1050 | if (!already && !NILP (flag)) | |
1051 | lock_file (fn); | |
1052 | else if (already && NILP (flag)) | |
1053 | unlock_file (fn); | |
1054 | } | |
1055 | #endif /* CLASH_DETECTION */ | |
1056 | ||
1057 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; | |
1058 | return flag; | |
1059 | } | |
1060 | ||
1ab256cb | 1061 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1062 | 0, 1, 0, |
7ee72033 | 1063 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1064 | Each buffer has a tick counter which is incremented each time the text in |
1065 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1066 | No argument or nil as argument means use current buffer as BUFFER. */) |
1067 | (buffer) | |
1ab256cb RM |
1068 | register Lisp_Object buffer; |
1069 | { | |
1070 | register struct buffer *buf; | |
265a9e55 | 1071 | if (NILP (buffer)) |
1ab256cb RM |
1072 | buf = current_buffer; |
1073 | else | |
1074 | { | |
b7826503 | 1075 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1076 | buf = XBUFFER (buffer); |
1077 | } | |
1078 | ||
1079 | return make_number (BUF_MODIFF (buf)); | |
1080 | } | |
1081 | \f | |
01050cb5 | 1082 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1083 | "sRename buffer (to new name): \nP", |
7ee72033 | 1084 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1085 | If second arg UNIQUE is nil or omitted, it is an error if a |
1086 | buffer named NEWNAME already exists. | |
1087 | If UNIQUE is non-nil, come up with a new name using | |
1088 | `generate-new-buffer-name'. | |
1089 | Interactively, you can set UNIQUE with a prefix argument. | |
1090 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1091 | This does not change the name of the visited file (if any). */) |
1092 | (newname, unique) | |
489c043a | 1093 | register Lisp_Object newname, unique; |
1ab256cb RM |
1094 | { |
1095 | register Lisp_Object tem, buf; | |
1096 | ||
b7826503 | 1097 | CHECK_STRING (newname); |
d59698c4 | 1098 | |
d5db4077 | 1099 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1100 | error ("Empty string is invalid as a buffer name"); |
1101 | ||
489c043a | 1102 | tem = Fget_buffer (newname); |
265a9e55 | 1103 | if (!NILP (tem)) |
01050cb5 | 1104 | { |
8801a864 KR |
1105 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1106 | rename the buffer automatically so you can create another | |
1107 | with the original name. It makes UNIQUE equivalent to | |
1108 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1109 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1110 | return current_buffer->name; | |
3bd779aa | 1111 | if (!NILP (unique)) |
489c043a | 1112 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1113 | else |
d5db4077 | 1114 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1115 | } |
1ab256cb | 1116 | |
489c043a | 1117 | current_buffer->name = newname; |
76f590d7 JB |
1118 | |
1119 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1120 | any windows displaying current_buffer will stay unchanged. */ | |
1121 | update_mode_lines++; | |
1122 | ||
67180c6a | 1123 | XSETBUFFER (buf, current_buffer); |
489c043a | 1124 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1125 | if (NILP (current_buffer->filename) |
1126 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1127 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1128 | /* Refetch since that last call may have done GC. */ |
1129 | return current_buffer->name; | |
1ab256cb RM |
1130 | } |
1131 | ||
773fbdb9 | 1132 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1133 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1134 | Buffers not visible in windows are preferred to visible buffers, |
1135 | unless optional second argument VISIBLE-OK is non-nil. | |
1136 | If the optional third argument FRAME is non-nil, use that frame's | |
1137 | buffer list instead of the selected frame's buffer list. | |
1138 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1139 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1140 | (buffer, visible_ok, frame) | |
773fbdb9 | 1141 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1142 | { |
89132f25 | 1143 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1144 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1145 | notsogood = Qnil; |
1146 | ||
773fbdb9 | 1147 | if (NILP (frame)) |
9ba9623d | 1148 | frame = selected_frame; |
773fbdb9 | 1149 | |
7962a441 | 1150 | tail = Vbuffer_alist; |
773fbdb9 | 1151 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1152 | |
1153 | /* Consider buffers that have been seen in the selected frame | |
1154 | before other buffers. */ | |
1155 | ||
773fbdb9 | 1156 | tem = frame_buffer_list (frame); |
7962a441 RS |
1157 | add_ons = Qnil; |
1158 | while (CONSP (tem)) | |
1159 | { | |
7539e11f KR |
1160 | if (BUFFERP (XCAR (tem))) |
1161 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1162 | tem = XCDR (tem); | |
7962a441 RS |
1163 | } |
1164 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1165 | ||
6d70a280 | 1166 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1167 | { |
6d70a280 | 1168 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1169 | if (EQ (buf, buffer)) |
1170 | continue; | |
10ceceb8 | 1171 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1172 | continue; |
04ae1b48 RS |
1173 | /* If the selected frame has a buffer_predicate, |
1174 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1175 | if (!NILP (pred)) |
04ae1b48 | 1176 | { |
7962a441 | 1177 | tem = call1 (pred, buf); |
04ae1b48 RS |
1178 | if (NILP (tem)) |
1179 | continue; | |
1180 | } | |
04ae1b48 | 1181 | |
a0ebb746 | 1182 | if (NILP (visible_ok)) |
66ffe51c | 1183 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1184 | else |
1185 | tem = Qnil; | |
265a9e55 | 1186 | if (NILP (tem)) |
1ab256cb | 1187 | return buf; |
265a9e55 | 1188 | if (NILP (notsogood)) |
1ab256cb RM |
1189 | notsogood = buf; |
1190 | } | |
265a9e55 | 1191 | if (!NILP (notsogood)) |
1ab256cb | 1192 | return notsogood; |
dba1a30a GM |
1193 | buf = Fget_buffer (build_string ("*scratch*")); |
1194 | if (NILP (buf)) | |
1195 | { | |
1196 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1197 | Fset_buffer_major_mode (buf); | |
1198 | } | |
89132f25 | 1199 | return buf; |
1ab256cb RM |
1200 | } |
1201 | \f | |
316784fb KH |
1202 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
1203 | 0, 1, "", | |
7ee72033 MB |
1204 | doc: /* Make BUFFER stop keeping undo information. |
1205 | No argument or nil as argument means do this for the current buffer. */) | |
1206 | (buffer) | |
ffd56f97 | 1207 | register Lisp_Object buffer; |
1ab256cb | 1208 | { |
ffd56f97 JB |
1209 | Lisp_Object real_buffer; |
1210 | ||
1211 | if (NILP (buffer)) | |
67180c6a | 1212 | XSETBUFFER (real_buffer, current_buffer); |
ffd56f97 JB |
1213 | else |
1214 | { | |
1215 | real_buffer = Fget_buffer (buffer); | |
1216 | if (NILP (real_buffer)) | |
1217 | nsberror (buffer); | |
1218 | } | |
1219 | ||
1220 | XBUFFER (real_buffer)->undo_list = Qt; | |
1221 | ||
1ab256cb RM |
1222 | return Qnil; |
1223 | } | |
1224 | ||
1225 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, | |
1226 | 0, 1, "", | |
7ee72033 MB |
1227 | doc: /* Start keeping undo information for buffer BUFFER. |
1228 | No argument or nil as argument means do this for the current buffer. */) | |
1229 | (buffer) | |
ffd56f97 | 1230 | register Lisp_Object buffer; |
1ab256cb | 1231 | { |
ffd56f97 | 1232 | Lisp_Object real_buffer; |
1ab256cb | 1233 | |
ffd56f97 | 1234 | if (NILP (buffer)) |
67180c6a | 1235 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1236 | else |
1237 | { | |
ffd56f97 JB |
1238 | real_buffer = Fget_buffer (buffer); |
1239 | if (NILP (real_buffer)) | |
1240 | nsberror (buffer); | |
1ab256cb RM |
1241 | } |
1242 | ||
ffd56f97 JB |
1243 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1244 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1245 | |
1246 | return Qnil; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1251 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1252 | The buffer being killed will be current while the hook is running.\n\ | |
1253 | See `kill-buffer'." | |
1254 | */ | |
1255 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1256 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1257 | The argument may be a buffer or may be the name of a buffer. |
1258 | An argument of nil means kill the current buffer. | |
1259 | ||
1260 | Value is t if the buffer is actually killed, nil if user says no. | |
1261 | ||
1262 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1263 | if not void, is a list of functions to be called, with no arguments, | |
1264 | before the buffer is actually killed. The buffer to be killed is current | |
1265 | when the hook functions are called. | |
1266 | ||
1267 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1268 | with SIGHUP. */) |
1269 | (buffer) | |
a25f13ae | 1270 | Lisp_Object buffer; |
1ab256cb RM |
1271 | { |
1272 | Lisp_Object buf; | |
1273 | register struct buffer *b; | |
1274 | register Lisp_Object tem; | |
1275 | register struct Lisp_Marker *m; | |
6af718a4 | 1276 | struct gcpro gcpro1; |
1ab256cb | 1277 | |
a25f13ae | 1278 | if (NILP (buffer)) |
1ab256cb RM |
1279 | buf = Fcurrent_buffer (); |
1280 | else | |
a25f13ae | 1281 | buf = Fget_buffer (buffer); |
265a9e55 | 1282 | if (NILP (buf)) |
a25f13ae | 1283 | nsberror (buffer); |
1ab256cb RM |
1284 | |
1285 | b = XBUFFER (buf); | |
1286 | ||
4a4a9db5 KH |
1287 | /* Avoid trouble for buffer already dead. */ |
1288 | if (NILP (b->name)) | |
1289 | return Qnil; | |
1290 | ||
1ab256cb | 1291 | /* Query if the buffer is still modified. */ |
265a9e55 | 1292 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1293 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1294 | { |
a25f13ae | 1295 | GCPRO1 (buf); |
1ab256cb | 1296 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
d5db4077 | 1297 | SDATA (b->name))); |
1ab256cb | 1298 | UNGCPRO; |
265a9e55 | 1299 | if (NILP (tem)) |
1ab256cb RM |
1300 | return Qnil; |
1301 | } | |
1302 | ||
dcdffbf6 | 1303 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1304 | { |
aed13378 | 1305 | int count = SPECPDL_INDEX (); |
dcdffbf6 | 1306 | Lisp_Object list; |
1ab256cb RM |
1307 | |
1308 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1309 | set_buffer_internal (b); | |
dcdffbf6 RS |
1310 | |
1311 | /* First run the query functions; if any query is answered no, | |
1312 | don't kill the buffer. */ | |
6d70a280 | 1313 | for (list = Vkill_buffer_query_functions; CONSP (list); list = XCDR (list)) |
dcdffbf6 | 1314 | { |
6d70a280 | 1315 | tem = call0 (XCAR (list)); |
dcdffbf6 RS |
1316 | if (NILP (tem)) |
1317 | return unbind_to (count, Qnil); | |
1318 | } | |
1319 | ||
1320 | /* Then run the hooks. */ | |
f1597a3a | 1321 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1322 | unbind_to (count, Qnil); |
1323 | } | |
1324 | ||
1325 | /* We have no more questions to ask. Verify that it is valid | |
1326 | to kill the buffer. This must be done after the questions | |
1327 | since anything can happen within do_yes_or_no_p. */ | |
1328 | ||
1329 | /* Don't kill the minibuffer now current. */ | |
1330 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1331 | return Qnil; | |
1332 | ||
265a9e55 | 1333 | if (NILP (b->name)) |
1ab256cb RM |
1334 | return Qnil; |
1335 | ||
336cd056 RS |
1336 | /* When we kill a base buffer, kill all its indirect buffers. |
1337 | We do it at this stage so nothing terrible happens if they | |
1338 | ask questions or their hooks get errors. */ | |
1339 | if (! b->base_buffer) | |
1340 | { | |
1341 | struct buffer *other; | |
1342 | ||
1343 | GCPRO1 (buf); | |
1344 | ||
1345 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1346 | /* all_buffers contains dead buffers too; |
1347 | don't re-kill them. */ | |
1348 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1349 | { |
1350 | Lisp_Object buf; | |
1351 | XSETBUFFER (buf, other); | |
1352 | Fkill_buffer (buf); | |
1353 | } | |
1354 | ||
1355 | UNGCPRO; | |
1356 | } | |
1357 | ||
1ab256cb RM |
1358 | /* Make this buffer not be current. |
1359 | In the process, notice if this is the sole visible buffer | |
1360 | and give up if so. */ | |
1361 | if (b == current_buffer) | |
1362 | { | |
773fbdb9 | 1363 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1364 | Fset_buffer (tem); |
1365 | if (b == current_buffer) | |
1366 | return Qnil; | |
1367 | } | |
1368 | ||
77270fac GM |
1369 | /* Notice if the buffer to kill is the sole visible buffer |
1370 | when we're currently in the mini-buffer, and give up if so. */ | |
1371 | XSETBUFFER (tem, current_buffer); | |
1372 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1373 | { | |
1374 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1375 | if (EQ (buf, tem)) |
1376 | return Qnil; | |
1377 | } | |
1378 | ||
1ab256cb RM |
1379 | /* Now there is no question: we can kill the buffer. */ |
1380 | ||
1381 | #ifdef CLASH_DETECTION | |
1382 | /* Unlock this buffer's file, if it is locked. */ | |
1383 | unlock_buffer (b); | |
1384 | #endif /* CLASH_DETECTION */ | |
1385 | ||
1ab256cb | 1386 | kill_buffer_processes (buf); |
1ab256cb RM |
1387 | |
1388 | tem = Vinhibit_quit; | |
1389 | Vinhibit_quit = Qt; | |
00550f94 | 1390 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1391 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1392 | frames_discard_buffer (buf); |
1ab256cb RM |
1393 | Vinhibit_quit = tem; |
1394 | ||
9cf712eb RS |
1395 | /* Delete any auto-save file, if we saved it in this session. |
1396 | But not if the buffer is modified. */ | |
a7a60ce9 | 1397 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1398 | && b->auto_save_modified != 0 |
9cf712eb RS |
1399 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
1400 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b)) | |
1ab256cb RM |
1401 | { |
1402 | Lisp_Object tem; | |
1403 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1404 | if (! NILP (tem)) |
cbb6a418 | 1405 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1406 | } |
1407 | ||
4a4a9db5 KH |
1408 | if (b->base_buffer) |
1409 | { | |
1410 | /* Unchain all markers that belong to this indirect buffer. | |
1411 | Don't unchain the markers that belong to the base buffer | |
1412 | or its other indirect buffers. */ | |
1413 | for (tem = BUF_MARKERS (b); !NILP (tem); ) | |
1414 | { | |
1415 | Lisp_Object next; | |
1416 | m = XMARKER (tem); | |
1417 | next = m->chain; | |
1418 | if (m->buffer == b) | |
1419 | unchain_marker (tem); | |
1420 | tem = next; | |
1421 | } | |
1422 | } | |
1423 | else | |
1ab256cb | 1424 | { |
4a4a9db5 | 1425 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1426 | and leave them pointing nowhere. */ |
4a4a9db5 | 1427 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
336cd056 RS |
1428 | { |
1429 | m = XMARKER (tem); | |
1430 | m->buffer = 0; | |
1431 | tem = m->chain; | |
1432 | m->chain = Qnil; | |
1433 | } | |
1434 | BUF_MARKERS (b) = Qnil; | |
336cd056 | 1435 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1436 | |
1437 | /* Perhaps we should explicitly free the interval tree here... */ | |
1438 | } | |
33f7013e | 1439 | |
2f3f993b RS |
1440 | /* Reset the local variables, so that this buffer's local values |
1441 | won't be protected from GC. They would be protected | |
1442 | if they happened to remain encached in their symbols. | |
1443 | This gets rid of them for certain. */ | |
1444 | swap_out_buffer_local_variables (b); | |
13de9290 | 1445 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1446 | |
1ab256cb | 1447 | b->name = Qnil; |
336cd056 | 1448 | |
9ac0d9e0 | 1449 | BLOCK_INPUT; |
336cd056 | 1450 | if (! b->base_buffer) |
b86af064 | 1451 | free_buffer_text (b); |
336cd056 | 1452 | |
28e969dd JB |
1453 | if (b->newline_cache) |
1454 | { | |
1455 | free_region_cache (b->newline_cache); | |
1456 | b->newline_cache = 0; | |
1457 | } | |
1458 | if (b->width_run_cache) | |
1459 | { | |
1460 | free_region_cache (b->width_run_cache); | |
1461 | b->width_run_cache = 0; | |
1462 | } | |
1463 | b->width_table = Qnil; | |
9ac0d9e0 | 1464 | UNBLOCK_INPUT; |
1ab256cb RM |
1465 | b->undo_list = Qnil; |
1466 | ||
1467 | return Qt; | |
1468 | } | |
1469 | \f | |
36a8c287 JB |
1470 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1471 | we do this each time BUF is selected visibly, the more recently | |
1472 | selected buffers are always closer to the front of the list. This | |
1473 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1474 | |
01136e9b | 1475 | void |
1ab256cb RM |
1476 | record_buffer (buf) |
1477 | Lisp_Object buf; | |
1478 | { | |
1479 | register Lisp_Object link, prev; | |
773fbdb9 | 1480 | Lisp_Object frame; |
9ba9623d | 1481 | frame = selected_frame; |
1ab256cb RM |
1482 | |
1483 | prev = Qnil; | |
7539e11f | 1484 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1485 | { |
7539e11f | 1486 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1487 | break; |
1488 | prev = link; | |
1489 | } | |
1490 | ||
36a8c287 JB |
1491 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1492 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1493 | |
265a9e55 | 1494 | if (NILP (prev)) |
7539e11f | 1495 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1496 | else |
f3fbd155 | 1497 | XSETCDR (prev, XCDR (XCDR (prev))); |
1ab256cb | 1498 | |
f3fbd155 | 1499 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1500 | Vbuffer_alist = link; |
7962a441 RS |
1501 | |
1502 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1503 | ||
1504 | prev = Qnil; | |
773fbdb9 | 1505 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1506 | link = XCDR (link)) |
7962a441 | 1507 | { |
7539e11f | 1508 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1509 | break; |
1510 | prev = link; | |
1511 | } | |
1512 | ||
1513 | /* Effectively do delq. */ | |
1514 | ||
1515 | if (CONSP (link)) | |
1516 | { | |
1517 | if (NILP (prev)) | |
773fbdb9 | 1518 | set_frame_buffer_list (frame, |
7539e11f | 1519 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1520 | else |
f3fbd155 | 1521 | XSETCDR (prev, XCDR (XCDR (prev))); |
7962a441 | 1522 | |
f3fbd155 | 1523 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1524 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1525 | } |
1526 | else | |
773fbdb9 | 1527 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1528 | } |
1529 | ||
a9ee7a59 | 1530 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1531 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1532 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1533 | according to `default-major-mode'. |
018ba359 | 1534 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1535 | the current buffer's major mode. */) |
1536 | (buffer) | |
a2428fa2 | 1537 | Lisp_Object buffer; |
a9ee7a59 KH |
1538 | { |
1539 | int count; | |
1540 | Lisp_Object function; | |
1541 | ||
71a0f2c6 | 1542 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1543 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1544 | function = find_symbol_value (intern ("initial-major-mode")); |
1545 | else | |
1546 | { | |
1547 | function = buffer_defaults.major_mode; | |
1548 | if (NILP (function) | |
1549 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1550 | function = current_buffer->major_mode; | |
1551 | } | |
1552 | ||
48265e61 DL |
1553 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1554 | return Qnil; | |
1555 | ||
aed13378 | 1556 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1557 | |
48265e61 DL |
1558 | /* To select a nonfundamental mode, |
1559 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1560 | |
1561 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1562 | ||
a2428fa2 | 1563 | Fset_buffer (buffer); |
48265e61 | 1564 | call0 (function); |
a9ee7a59 KH |
1565 | |
1566 | return unbind_to (count, Qnil); | |
1567 | } | |
1568 | ||
2594e0fd RS |
1569 | /* If switching buffers in WINDOW would be an error, return |
1570 | a C string saying what the error would be. */ | |
1571 | ||
1572 | char * | |
1573 | no_switch_window (window) | |
1574 | Lisp_Object window; | |
1ab256cb | 1575 | { |
1ab256cb | 1576 | Lisp_Object tem; |
2594e0fd RS |
1577 | if (EQ (minibuf_window, window)) |
1578 | return "Cannot switch buffers in minibuffer window"; | |
1579 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1580 | if (EQ (tem, Qt)) |
2594e0fd RS |
1581 | return "Cannot switch buffers in a dedicated window"; |
1582 | return NULL; | |
1583 | } | |
1584 | ||
1585 | /* Switch to buffer BUFFER in the selected window. | |
1586 | If NORECORD is non-nil, don't call record_buffer. */ | |
1587 | ||
1588 | Lisp_Object | |
1589 | switch_to_buffer_1 (buffer, norecord) | |
1590 | Lisp_Object buffer, norecord; | |
1591 | { | |
1592 | register Lisp_Object buf; | |
1ab256cb | 1593 | |
a25f13ae | 1594 | if (NILP (buffer)) |
773fbdb9 | 1595 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1596 | else |
a9ee7a59 | 1597 | { |
a25f13ae | 1598 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1599 | if (NILP (buf)) |
1600 | { | |
a25f13ae | 1601 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1602 | Fset_buffer_major_mode (buf); |
1603 | } | |
1604 | } | |
1ab256cb | 1605 | Fset_buffer (buf); |
265a9e55 | 1606 | if (NILP (norecord)) |
1ab256cb RM |
1607 | record_buffer (buf); |
1608 | ||
1609 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1610 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1611 | : selected_window, | |
1ab256cb RM |
1612 | buf); |
1613 | ||
cd0c235a | 1614 | return buf; |
1ab256cb RM |
1615 | } |
1616 | ||
2594e0fd | 1617 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1618 | doc: /* Select buffer BUFFER in the current window. |
018ba359 PJ |
1619 | BUFFER may be a buffer or a buffer name. |
1620 | Optional second arg NORECORD non-nil means | |
1621 | do not put this buffer at the front of the list of recently selected ones. | |
1622 | ||
1623 | WARNING: This is NOT the way to work on another buffer temporarily | |
1624 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1625 | the window-buffer correspondences. */) |
1626 | (buffer, norecord) | |
2594e0fd RS |
1627 | Lisp_Object buffer, norecord; |
1628 | { | |
1629 | char *err; | |
1630 | ||
1631 | err = no_switch_window (selected_window); | |
1632 | if (err) error (err); | |
1633 | ||
1634 | return switch_to_buffer_1 (buffer, norecord); | |
1635 | } | |
1636 | ||
cd0c235a | 1637 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1638 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
018ba359 PJ |
1639 | If BUFFER is nil, then some other buffer is chosen. |
1640 | If `pop-up-windows' is non-nil, windows can be split to do this. | |
1641 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another | |
1642 | window even if BUFFER is already visible in the selected window. | |
1643 | This uses the function `display-buffer' as a subroutine; see the documentation | |
1644 | of `display-buffer' for additional customization information. | |
1645 | ||
1646 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1647 | do not put this buffer at the front of the list of recently selected ones. */) |
1648 | (buffer, other_window, norecord) | |
6d12711f | 1649 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1650 | { |
1651 | register Lisp_Object buf; | |
a25f13ae | 1652 | if (NILP (buffer)) |
773fbdb9 | 1653 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1654 | else |
7c2087ee | 1655 | { |
a25f13ae | 1656 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1657 | if (NILP (buf)) |
1658 | { | |
a25f13ae | 1659 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1660 | Fset_buffer_major_mode (buf); |
1661 | } | |
1662 | } | |
1ab256cb | 1663 | Fset_buffer (buf); |
6d12711f | 1664 | if (NILP (norecord)) |
c58dab63 | 1665 | /* This seems bogus since Fselect_window will call record_buffer anyway. */ |
6d12711f | 1666 | record_buffer (buf); |
6b17d756 | 1667 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil)); |
e8b3a22d | 1668 | return buf; |
1ab256cb RM |
1669 | } |
1670 | ||
1671 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1672 | doc: /* Return the current buffer as a Lisp object. */) |
1673 | () | |
1ab256cb RM |
1674 | { |
1675 | register Lisp_Object buf; | |
67180c6a | 1676 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1677 | return buf; |
1678 | } | |
1679 | \f | |
7ec44ec6 GM |
1680 | /* Set the current buffer to B. |
1681 | ||
1682 | We previously set windows_or_buffers_changed here to invalidate | |
1683 | global unchanged information in beg_unchanged and end_unchanged. | |
1684 | This is no longer necessary because we now compute unchanged | |
1685 | information on a buffer-basis. Every action affecting other | |
1686 | windows than the selected one requires a select_window at some | |
1687 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1688 | |
1689 | void | |
1690 | set_buffer_internal (b) | |
1691 | register struct buffer *b; | |
1692 | { | |
b5a225b4 | 1693 | if (current_buffer != b) |
7ec44ec6 | 1694 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1695 | } |
1696 | ||
1697 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1698 | This is used by redisplay. */ | |
1699 | ||
1700 | void | |
1701 | set_buffer_internal_1 (b) | |
1702 | register struct buffer *b; | |
1703 | { | |
1704 | register struct buffer *old_buf; | |
1705 | register Lisp_Object tail, valcontents; | |
1706 | Lisp_Object tem; | |
1707 | ||
b86af064 | 1708 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1709 | if (b->text->beg == NULL) |
b86af064 GM |
1710 | enlarge_buffer_text (b, 0); |
1711 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
684b01ee | 1712 | |
c7aa5005 KH |
1713 | if (current_buffer == b) |
1714 | return; | |
1715 | ||
1ab256cb RM |
1716 | old_buf = current_buffer; |
1717 | current_buffer = b; | |
1718 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1719 | ||
336cd056 RS |
1720 | if (old_buf) |
1721 | { | |
1722 | /* Put the undo list back in the base buffer, so that it appears | |
1723 | that an indirect buffer shares the undo list of its base. */ | |
1724 | if (old_buf->base_buffer) | |
1725 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1726 | ||
1727 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1728 | when it is not current, update them now. */ | |
1729 | if (! NILP (old_buf->pt_marker)) | |
1730 | { | |
1731 | Lisp_Object obuf; | |
1732 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1733 | set_marker_both (old_buf->pt_marker, obuf, |
1734 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1735 | } |
1736 | if (! NILP (old_buf->begv_marker)) | |
1737 | { | |
1738 | Lisp_Object obuf; | |
1739 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1740 | set_marker_both (old_buf->begv_marker, obuf, |
1741 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1742 | } |
1743 | if (! NILP (old_buf->zv_marker)) | |
1744 | { | |
1745 | Lisp_Object obuf; | |
1746 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1747 | set_marker_both (old_buf->zv_marker, obuf, |
1748 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1749 | } |
1750 | } | |
1751 | ||
1752 | /* Get the undo list from the base buffer, so that it appears | |
1753 | that an indirect buffer shares the undo list of its base. */ | |
1754 | if (b->base_buffer) | |
1755 | b->undo_list = b->base_buffer->undo_list; | |
1756 | ||
1757 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1758 | when it is not current, fetch them now. */ | |
1759 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1760 | { |
1761 | BUF_PT (b) = marker_position (b->pt_marker); | |
1762 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1763 | } | |
336cd056 | 1764 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1765 | { |
1766 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1767 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1768 | } | |
336cd056 | 1769 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1770 | { |
1771 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1772 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1773 | } | |
336cd056 | 1774 | |
1ab256cb RM |
1775 | /* Look down buffer's list of local Lisp variables |
1776 | to find and update any that forward into C variables. */ | |
1777 | ||
7539e11f | 1778 | for (tail = b->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1779 | { |
f5c1dd0d | 1780 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1781 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1782 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1783 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1784 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1785 | /* Just reference the variable |
1786 | to cause it to become set for this buffer. */ | |
7539e11f | 1787 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1788 | } |
1789 | ||
1790 | /* Do the same with any others that were local to the previous buffer */ | |
1791 | ||
1792 | if (old_buf) | |
7539e11f | 1793 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCDR (tail)) |
1ab256cb | 1794 | { |
f5c1dd0d | 1795 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1796 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1797 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1798 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1799 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1800 | /* Just reference the variable |
1801 | to cause it to become set for this buffer. */ | |
7539e11f | 1802 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1803 | } |
1804 | } | |
1805 | ||
336cd056 | 1806 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1807 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1808 | |
1809 | void | |
1810 | set_buffer_temp (b) | |
1811 | struct buffer *b; | |
1812 | { | |
1813 | register struct buffer *old_buf; | |
1814 | ||
1815 | if (current_buffer == b) | |
1816 | return; | |
1817 | ||
1818 | old_buf = current_buffer; | |
1819 | current_buffer = b; | |
1820 | ||
1821 | if (old_buf) | |
1822 | { | |
1823 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1824 | when it is not current, update them now. */ | |
1825 | if (! NILP (old_buf->pt_marker)) | |
1826 | { | |
1827 | Lisp_Object obuf; | |
1828 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1829 | set_marker_both (old_buf->pt_marker, obuf, |
1830 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1831 | } |
1832 | if (! NILP (old_buf->begv_marker)) | |
1833 | { | |
1834 | Lisp_Object obuf; | |
1835 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1836 | set_marker_both (old_buf->begv_marker, obuf, |
1837 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1838 | } |
1839 | if (! NILP (old_buf->zv_marker)) | |
1840 | { | |
1841 | Lisp_Object obuf; | |
1842 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1843 | set_marker_both (old_buf->zv_marker, obuf, |
1844 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1845 | } |
1846 | } | |
1847 | ||
1848 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1849 | when it is not current, fetch them now. */ | |
1850 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1851 | { |
1852 | BUF_PT (b) = marker_position (b->pt_marker); | |
1853 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1854 | } | |
336cd056 | 1855 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1856 | { |
1857 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1858 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1859 | } | |
336cd056 | 1860 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1861 | { |
1862 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1863 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1864 | } | |
336cd056 RS |
1865 | } |
1866 | ||
1ab256cb | 1867 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1868 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1869 | BUFFER may be a buffer or the name of an existing buffer. |
1870 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1871 | This function does not display the buffer, so its effect ends | |
1872 | when the current command terminates. | |
7ee72033 MB |
1873 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1874 | (buffer) | |
a25f13ae | 1875 | register Lisp_Object buffer; |
1ab256cb | 1876 | { |
a25f13ae KH |
1877 | register Lisp_Object buf; |
1878 | buf = Fget_buffer (buffer); | |
1879 | if (NILP (buf)) | |
1880 | nsberror (buffer); | |
1881 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1882 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1883 | set_buffer_internal (XBUFFER (buf)); |
1884 | return buf; | |
1ab256cb | 1885 | } |
d0628b06 RS |
1886 | |
1887 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1888 | ||
1889 | Lisp_Object | |
1890 | set_buffer_if_live (buffer) | |
1891 | Lisp_Object buffer; | |
1892 | { | |
1893 | if (! NILP (XBUFFER (buffer)->name)) | |
1894 | Fset_buffer (buffer); | |
1895 | return Qnil; | |
1896 | } | |
1ab256cb RM |
1897 | \f |
1898 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1899 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1900 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1901 | () | |
1ab256cb | 1902 | { |
a96b68f1 RS |
1903 | if (!NILP (current_buffer->read_only) |
1904 | && NILP (Vinhibit_read_only)) | |
1ab256cb RM |
1905 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
1906 | return Qnil; | |
1907 | } | |
1908 | ||
1909 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 1910 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
1911 | There it is the least likely candidate for `other-buffer' to return; |
1912 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
1913 | If BUFFER is nil or omitted, bury the current buffer. | |
1914 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
1915 | selected window if it is displayed there. */) |
1916 | (buffer) | |
a2428fa2 | 1917 | register Lisp_Object buffer; |
1ab256cb | 1918 | { |
b271272a | 1919 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1920 | if (NILP (buffer)) |
a5611885 | 1921 | { |
c58dab63 | 1922 | Lisp_Object tem; |
a2428fa2 | 1923 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1924 | |
c58dab63 | 1925 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1926 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1927 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1928 | { |
1929 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1930 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1931 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1932 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1933 | else | |
1934 | Fdelete_window (selected_window); | |
1935 | } | |
a5611885 | 1936 | } |
1ab256cb RM |
1937 | else |
1938 | { | |
1939 | Lisp_Object buf1; | |
1940 | ||
a2428fa2 | 1941 | buf1 = Fget_buffer (buffer); |
265a9e55 | 1942 | if (NILP (buf1)) |
a2428fa2 EN |
1943 | nsberror (buffer); |
1944 | buffer = buf1; | |
b271272a JB |
1945 | } |
1946 | ||
a1a8b28e GM |
1947 | /* Move buffer to the end of the buffer list. Do nothing if the |
1948 | buffer is killed. */ | |
1949 | if (!NILP (XBUFFER (buffer)->name)) | |
1950 | { | |
1951 | Lisp_Object aelt, link; | |
b271272a | 1952 | |
a1a8b28e GM |
1953 | aelt = Frassq (buffer, Vbuffer_alist); |
1954 | link = Fmemq (aelt, Vbuffer_alist); | |
1955 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 1956 | XSETCDR (link, Qnil); |
a1a8b28e | 1957 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 1958 | |
6c488ddb RS |
1959 | /* Removing BUFFER from frame-specific lists |
1960 | has the effect of putting BUFFER at the end | |
1961 | of the combined list in each frame. */ | |
1962 | frames_discard_buffer (buffer); | |
a1a8b28e | 1963 | } |
dec989eb | 1964 | |
1ab256cb RM |
1965 | return Qnil; |
1966 | } | |
1967 | \f | |
c922bc55 | 1968 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1969 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1970 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
1971 | so the buffer is truly empty after this. */) |
1972 | () | |
1ab256cb RM |
1973 | { |
1974 | Fwiden (); | |
c0d9a0c3 GM |
1975 | |
1976 | del_range (BEG, Z); | |
c280bc6a | 1977 | |
1ab256cb RM |
1978 | current_buffer->last_window_start = 1; |
1979 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1980 | if future size is less than past size. Use of erase-buffer | |
1981 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 1982 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
1983 | return Qnil; |
1984 | } | |
1985 | ||
01136e9b | 1986 | void |
1ab256cb RM |
1987 | validate_region (b, e) |
1988 | register Lisp_Object *b, *e; | |
1989 | { | |
b7826503 PJ |
1990 | CHECK_NUMBER_COERCE_MARKER (*b); |
1991 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1992 | |
1993 | if (XINT (*b) > XINT (*e)) | |
1994 | { | |
03192067 KH |
1995 | Lisp_Object tem; |
1996 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1997 | } |
1998 | ||
1999 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2000 | && XINT (*e) <= ZV)) | |
2001 | args_out_of_range (*b, *e); | |
2002 | } | |
2003 | \f | |
b05525fa RS |
2004 | /* Advance BYTE_POS up to a character boundary |
2005 | and return the adjusted position. */ | |
2006 | ||
2007 | static int | |
2008 | advance_to_char_boundary (byte_pos) | |
2009 | int byte_pos; | |
2010 | { | |
f8449323 | 2011 | int c; |
b05525fa | 2012 | |
f8449323 RS |
2013 | if (byte_pos == BEG) |
2014 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2015 | return BEG; |
f8449323 RS |
2016 | |
2017 | c = FETCH_BYTE (byte_pos); | |
2018 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2019 | { |
1be6387d | 2020 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2021 | multibyte sequence. */ |
a9bcded1 KH |
2022 | int orig_byte_pos = byte_pos; |
2023 | ||
2024 | do | |
2025 | { | |
2026 | byte_pos--; | |
2027 | c = FETCH_BYTE (byte_pos); | |
2028 | } | |
2029 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2030 | INC_POS (byte_pos); |
a9bcded1 KH |
2031 | if (byte_pos < orig_byte_pos) |
2032 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2033 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2034 | surely advance to the correct character boundary. If C is | |
2035 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2036 | } |
2037 | ||
20773569 | 2038 | return byte_pos; |
b05525fa RS |
2039 | } |
2040 | ||
3ac81adb RS |
2041 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2042 | 1, 1, 0, | |
7ee72033 | 2043 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2044 | If FLAG is t, this makes the buffer a multibyte buffer. |
2045 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2046 | The buffer contents remain unchanged as a sequence of bytes | |
7ee72033 MB |
2047 | but the contents viewed as characters do change. */) |
2048 | (flag) | |
3ac81adb RS |
2049 | Lisp_Object flag; |
2050 | { | |
2051 | Lisp_Object tail, markers; | |
abc9d959 | 2052 | struct buffer *other; |
a9bcded1 KH |
2053 | int undo_enabled_p = !EQ (current_buffer->undo_list, Qt); |
2054 | int begv = BEGV, zv = ZV; | |
2055 | int narrowed = (BEG != begv || Z != zv); | |
ed00559d | 2056 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
3ac81adb | 2057 | |
6e553d5e RS |
2058 | if (current_buffer->base_buffer) |
2059 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2060 | ||
70e77119 AS |
2061 | /* Do nothing if nothing actually changes. */ |
2062 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2063 | return flag; | |
2064 | ||
b05525fa RS |
2065 | /* It would be better to update the list, |
2066 | but this is good enough for now. */ | |
a9bcded1 KH |
2067 | if (undo_enabled_p) |
2068 | current_buffer->undo_list = Qt; | |
b05525fa | 2069 | |
3ac81adb RS |
2070 | /* If the cached position is for this buffer, clear it out. */ |
2071 | clear_charpos_cache (current_buffer); | |
2072 | ||
a9bcded1 KH |
2073 | if (narrowed) |
2074 | Fwiden (); | |
2075 | ||
3ac81adb RS |
2076 | if (NILP (flag)) |
2077 | { | |
a9bcded1 KH |
2078 | int pos, stop; |
2079 | unsigned char *p; | |
2080 | ||
3ac81adb RS |
2081 | /* Do this first, so it can use CHAR_TO_BYTE |
2082 | to calculate the old correspondences. */ | |
2083 | set_intervals_multibyte (0); | |
2084 | ||
2085 | current_buffer->enable_multibyte_characters = Qnil; | |
2086 | ||
2087 | Z = Z_BYTE; | |
2088 | BEGV = BEGV_BYTE; | |
2089 | ZV = ZV_BYTE; | |
2090 | GPT = GPT_BYTE; | |
2091 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2092 | ||
2093 | tail = BUF_MARKERS (current_buffer); | |
8801a864 | 2094 | while (! NILP (tail)) |
3ac81adb RS |
2095 | { |
2096 | XMARKER (tail)->charpos = XMARKER (tail)->bytepos; | |
2097 | tail = XMARKER (tail)->chain; | |
2098 | } | |
a9bcded1 KH |
2099 | |
2100 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2101 | pos = BEG; | |
2102 | stop = GPT; | |
2103 | p = BEG_ADDR; | |
2104 | while (1) | |
2105 | { | |
2106 | int c, bytes; | |
2107 | ||
2108 | if (pos == stop) | |
2109 | { | |
2110 | if (pos == Z) | |
2111 | break; | |
2112 | p = GAP_END_ADDR; | |
2113 | stop = Z; | |
2114 | } | |
2115 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2116 | p += bytes, pos += bytes; | |
2117 | else | |
2118 | { | |
2119 | c = STRING_CHAR (p, stop - pos); | |
2120 | /* Delete all bytes for this 8-bit character but the | |
2121 | last one, and change the last one to the charcter | |
2122 | code. */ | |
2123 | bytes--; | |
2124 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2125 | p = GAP_END_ADDR; | |
2126 | *p++ = c; | |
2127 | pos++; | |
2128 | if (begv > pos) | |
2129 | begv -= bytes; | |
2130 | if (zv > pos) | |
2131 | zv -= bytes; | |
2132 | stop = Z; | |
2133 | } | |
2134 | } | |
2135 | if (narrowed) | |
2136 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2137 | } |
2138 | else | |
2139 | { | |
a9bcded1 KH |
2140 | int pt = PT; |
2141 | int pos, stop; | |
2142 | unsigned char *p; | |
2143 | ||
673c57d2 | 2144 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2145 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2146 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2147 | |
2148 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2149 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2150 | { | |
2151 | unsigned char *p = GPT_ADDR - 1; | |
2152 | ||
2153 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2154 | if (BASE_LEADING_CODE_P (*p)) | |
2155 | { | |
2156 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2157 | ||
2158 | move_gap_both (new_gpt, new_gpt); | |
2159 | } | |
2160 | } | |
2161 | ||
a9bcded1 KH |
2162 | /* Make the buffer contents valid as multibyte by converting |
2163 | 8-bit characters to multibyte form. */ | |
2164 | pos = BEG; | |
2165 | stop = GPT; | |
2166 | p = BEG_ADDR; | |
2167 | while (1) | |
2168 | { | |
2169 | int bytes; | |
2170 | ||
2171 | if (pos == stop) | |
2172 | { | |
2173 | if (pos == Z) | |
2174 | break; | |
2175 | p = GAP_END_ADDR; | |
2176 | stop = Z; | |
2177 | } | |
2178 | ||
2179 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) | |
2180 | p += bytes, pos += bytes; | |
2181 | else | |
2182 | { | |
2183 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2184 | ||
2185 | bytes = CHAR_STRING (*p, tmp); | |
2186 | *p = tmp[0]; | |
2187 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2188 | bytes--; | |
2189 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2190 | /* Now the gap is after the just inserted data. */ | |
2191 | pos = GPT; | |
2192 | p = GAP_END_ADDR; | |
2193 | if (pos <= begv) | |
2194 | begv += bytes; | |
2195 | if (pos <= zv) | |
2196 | zv += bytes; | |
2197 | if (pos <= pt) | |
2198 | pt += bytes; | |
2199 | stop = Z; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | if (pt != PT) | |
2204 | TEMP_SET_PT (pt); | |
2205 | ||
2206 | if (narrowed) | |
2207 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2208 | ||
3ac81adb RS |
2209 | /* Do this first, so that chars_in_text asks the right question. |
2210 | set_intervals_multibyte needs it too. */ | |
2211 | current_buffer->enable_multibyte_characters = Qt; | |
2212 | ||
b05525fa | 2213 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2214 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2215 | |
673c57d2 | 2216 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2217 | |
2218 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2219 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2220 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2221 | else |
2222 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2223 | |
2224 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2225 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2226 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2227 | else |
2228 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2229 | |
2230 | { | |
2231 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2232 | int pt; | |
2233 | ||
2234 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2235 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2236 | else |
2237 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2238 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2239 | } | |
3ac81adb RS |
2240 | |
2241 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2242 | |
2243 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2244 | getting confused by the markers that have not yet been updated. | |
2245 | It is also a signal that it should never create a marker. */ | |
3ac81adb RS |
2246 | BUF_MARKERS (current_buffer) = Qnil; |
2247 | ||
8801a864 | 2248 | while (! NILP (tail)) |
3ac81adb | 2249 | { |
b05525fa RS |
2250 | XMARKER (tail)->bytepos |
2251 | = advance_to_char_boundary (XMARKER (tail)->bytepos); | |
3ac81adb | 2252 | XMARKER (tail)->charpos = BYTE_TO_CHAR (XMARKER (tail)->bytepos); |
b05525fa | 2253 | |
3ac81adb RS |
2254 | tail = XMARKER (tail)->chain; |
2255 | } | |
b69f9797 RS |
2256 | |
2257 | /* Make sure no markers were put on the chain | |
2258 | while the chain value was incorrect. */ | |
2259 | if (! EQ (BUF_MARKERS (current_buffer), Qnil)) | |
2260 | abort (); | |
2261 | ||
3ac81adb RS |
2262 | BUF_MARKERS (current_buffer) = markers; |
2263 | ||
2264 | /* Do this last, so it can calculate the new correspondences | |
2265 | between chars and bytes. */ | |
2266 | set_intervals_multibyte (1); | |
2267 | } | |
2268 | ||
a9bcded1 KH |
2269 | if (undo_enabled_p) |
2270 | current_buffer->undo_list = Qnil; | |
2271 | ||
724b203f GM |
2272 | /* Changing the multibyteness of a buffer means that all windows |
2273 | showing that buffer must be updated thoroughly. */ | |
2274 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2275 | ++windows_or_buffers_changed; | |
2276 | ||
abc9d959 RS |
2277 | /* Copy this buffer's new multibyte status |
2278 | into all of its indirect buffers. */ | |
2279 | for (other = all_buffers; other; other = other->next) | |
2280 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2281 | { |
2282 | other->enable_multibyte_characters | |
2283 | = current_buffer->enable_multibyte_characters; | |
2284 | other->prevent_redisplay_optimizations_p = 1; | |
2285 | } | |
abc9d959 | 2286 | |
ed00559d KH |
2287 | /* Restore the modifiedness of the buffer. */ |
2288 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2289 | Fset_buffer_modified_p (Qnil); | |
2290 | ||
3ac81adb RS |
2291 | return flag; |
2292 | } | |
2293 | \f | |
1ab256cb | 2294 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2295 | 0, 0, 0, |
7ee72033 | 2296 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2297 | Most local variable bindings are eliminated so that the default values |
2298 | become effective once more. Also, the syntax table is set from | |
2299 | `standard-syntax-table', the local keymap is set to nil, | |
2300 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2301 | This function also forces redisplay of the mode line. | |
2302 | ||
2303 | Every function to select a new major mode starts by | |
2304 | calling this function. | |
2305 | ||
2306 | As a special exception, local variables whose names have | |
2307 | a non-nil `permanent-local' property are not eliminated by this function. | |
2308 | ||
2309 | The first thing this function does is run | |
7ee72033 MB |
2310 | the normal hook `change-major-mode-hook'. */) |
2311 | () | |
1ab256cb RM |
2312 | { |
2313 | register Lisp_Object alist, sym, tem; | |
2314 | Lisp_Object oalist; | |
7410477a | 2315 | |
fd186f07 RS |
2316 | if (!NILP (Vrun_hooks)) |
2317 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); | |
1ab256cb RM |
2318 | oalist = current_buffer->local_var_alist; |
2319 | ||
2f3f993b RS |
2320 | /* Make sure none of the bindings in oalist |
2321 | remain swapped in, in their symbols. */ | |
1ab256cb | 2322 | |
2f3f993b | 2323 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2324 | |
2325 | /* Actually eliminate all local bindings of this buffer. */ | |
2326 | ||
13de9290 | 2327 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2328 | |
1ab256cb RM |
2329 | /* Any which are supposed to be permanent, |
2330 | make local again, with the same values they had. */ | |
2331 | ||
7539e11f | 2332 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2333 | { |
7539e11f | 2334 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2335 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2336 | if (! NILP (tem)) |
01050cb5 RM |
2337 | { |
2338 | Fmake_local_variable (sym); | |
7539e11f | 2339 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2340 | } |
1ab256cb RM |
2341 | } |
2342 | ||
2343 | /* Force mode-line redisplay. Useful here because all major mode | |
2344 | commands call this function. */ | |
2345 | update_mode_lines++; | |
2346 | ||
2347 | return Qnil; | |
2348 | } | |
2f3f993b RS |
2349 | |
2350 | /* Make sure no local variables remain set up with buffer B | |
2351 | for their current values. */ | |
2352 | ||
2353 | static void | |
2354 | swap_out_buffer_local_variables (b) | |
2355 | struct buffer *b; | |
2356 | { | |
2357 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2358 | ||
2359 | XSETBUFFER (buffer, b); | |
2360 | oalist = b->local_var_alist; | |
2361 | ||
7539e11f | 2362 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2363 | { |
7539e11f | 2364 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2365 | |
2366 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2367 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2368 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2369 | { |
2370 | /* Symbol is set up for this buffer's old local value. | |
2371 | Set it up for the current buffer with the default value. */ | |
2372 | ||
f5c1dd0d | 2373 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2374 | /* Store the symbol's current value into the alist entry |
2375 | it is currently set up for. This is so that, if the | |
2376 | local is marked permanent, and we make it local again | |
2377 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2378 | XSETCDR (XCAR (tem), |
2379 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2380 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2381 | XSETCAR (tem, tem); |
2f3f993b | 2382 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2383 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2384 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2385 | store_symval_forwarding (sym, |
f5c1dd0d | 2386 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2387 | XCDR (tem), NULL); |
2f3f993b RS |
2388 | } |
2389 | } | |
2390 | } | |
1ab256cb | 2391 | \f |
2eec3b4e RS |
2392 | /* Find all the overlays in the current buffer that contain position POS. |
2393 | Return the number found, and store them in a vector in *VEC_PTR. | |
2394 | Store in *LEN_PTR the size allocated for the vector. | |
52f8ec73 JB |
2395 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
2396 | or ZV if there are no more overlays. | |
bbbe9545 | 2397 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 RS |
2398 | or where an overlay starts which ends at or after POS; |
2399 | or BEGV if there are no such overlays. | |
239c932b | 2400 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2401 | |
2402 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2403 | when this function is called. |
2404 | ||
2405 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2406 | If EXTEND is zero, we never extend the vector, | |
2407 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2408 | But we still return the total number of overlays. |
2409 | ||
2410 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2411 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2412 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2413 | |
2414 | int | |
ac869cf7 | 2415 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
2eec3b4e | 2416 | int pos; |
61d54cd5 | 2417 | int extend; |
2eec3b4e RS |
2418 | Lisp_Object **vec_ptr; |
2419 | int *len_ptr; | |
2420 | int *next_ptr; | |
239c932b | 2421 | int *prev_ptr; |
ac869cf7 | 2422 | int change_req; |
1ab256cb | 2423 | { |
6af718a4 | 2424 | Lisp_Object tail, overlay, start, end; |
2eec3b4e RS |
2425 | int idx = 0; |
2426 | int len = *len_ptr; | |
2427 | Lisp_Object *vec = *vec_ptr; | |
2428 | int next = ZV; | |
239c932b | 2429 | int prev = BEGV; |
61d54cd5 RS |
2430 | int inhibit_storing = 0; |
2431 | ||
2eec3b4e | 2432 | for (tail = current_buffer->overlays_before; |
8fc0589a | 2433 | GC_CONSP (tail); |
7539e11f | 2434 | tail = XCDR (tail)) |
2eec3b4e | 2435 | { |
239c932b | 2436 | int startpos, endpos; |
52f8ec73 | 2437 | |
7539e11f | 2438 | overlay = XCAR (tail); |
1ab256cb | 2439 | |
2eec3b4e RS |
2440 | start = OVERLAY_START (overlay); |
2441 | end = OVERLAY_END (overlay); | |
239c932b RS |
2442 | endpos = OVERLAY_POSITION (end); |
2443 | if (endpos < pos) | |
2444 | { | |
2445 | if (prev < endpos) | |
2446 | prev = endpos; | |
2447 | break; | |
2448 | } | |
413e06a4 RS |
2449 | startpos = OVERLAY_POSITION (start); |
2450 | /* This one ends at or after POS | |
daa1c109 | 2451 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2452 | if (prev < startpos && startpos < pos) |
2453 | prev = startpos; | |
239c932b RS |
2454 | if (endpos == pos) |
2455 | continue; | |
2eec3b4e RS |
2456 | if (startpos <= pos) |
2457 | { | |
2458 | if (idx == len) | |
2459 | { | |
61d54cd5 RS |
2460 | /* The supplied vector is full. |
2461 | Either make it bigger, or don't store any more in it. */ | |
2462 | if (extend) | |
2463 | { | |
0552666b GM |
2464 | /* Make it work with an initial len == 0. */ |
2465 | len *= 2; | |
2466 | if (len == 0) | |
2467 | len = 4; | |
2468 | *len_ptr = len; | |
61d54cd5 RS |
2469 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2470 | *vec_ptr = vec; | |
2471 | } | |
2472 | else | |
2473 | inhibit_storing = 1; | |
2eec3b4e | 2474 | } |
61d54cd5 RS |
2475 | |
2476 | if (!inhibit_storing) | |
2477 | vec[idx] = overlay; | |
2478 | /* Keep counting overlays even if we can't return them all. */ | |
2479 | idx++; | |
2eec3b4e RS |
2480 | } |
2481 | else if (startpos < next) | |
2482 | next = startpos; | |
2483 | } | |
2484 | ||
2485 | for (tail = current_buffer->overlays_after; | |
8fc0589a | 2486 | GC_CONSP (tail); |
7539e11f | 2487 | tail = XCDR (tail)) |
1ab256cb | 2488 | { |
239c932b | 2489 | int startpos, endpos; |
52f8ec73 | 2490 | |
7539e11f | 2491 | overlay = XCAR (tail); |
2eec3b4e RS |
2492 | |
2493 | start = OVERLAY_START (overlay); | |
2494 | end = OVERLAY_END (overlay); | |
2495 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2496 | if (pos < startpos) |
2eec3b4e RS |
2497 | { |
2498 | if (startpos < next) | |
2499 | next = startpos; | |
2500 | break; | |
2501 | } | |
239c932b RS |
2502 | endpos = OVERLAY_POSITION (end); |
2503 | if (pos < endpos) | |
2eec3b4e RS |
2504 | { |
2505 | if (idx == len) | |
2506 | { | |
61d54cd5 RS |
2507 | if (extend) |
2508 | { | |
4b0e44fc RS |
2509 | /* Make it work with an initial len == 0. */ |
2510 | len *= 2; | |
0552666b | 2511 | if (len == 0) |
4b0e44fc RS |
2512 | len = 4; |
2513 | *len_ptr = len; | |
61d54cd5 RS |
2514 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2515 | *vec_ptr = vec; | |
2516 | } | |
2517 | else | |
2518 | inhibit_storing = 1; | |
2eec3b4e | 2519 | } |
61d54cd5 RS |
2520 | |
2521 | if (!inhibit_storing) | |
2522 | vec[idx] = overlay; | |
2523 | idx++; | |
413e06a4 RS |
2524 | |
2525 | if (startpos < pos && startpos > prev) | |
2526 | prev = startpos; | |
2eec3b4e | 2527 | } |
239c932b RS |
2528 | else if (endpos < pos && endpos > prev) |
2529 | prev = endpos; | |
1d5f4c1d MB |
2530 | else if (endpos == pos && startpos > prev |
2531 | && (!change_req || startpos < pos)) | |
413e06a4 | 2532 | prev = startpos; |
1ab256cb RM |
2533 | } |
2534 | ||
239c932b RS |
2535 | if (next_ptr) |
2536 | *next_ptr = next; | |
2537 | if (prev_ptr) | |
2538 | *prev_ptr = prev; | |
2eec3b4e RS |
2539 | return idx; |
2540 | } | |
74514898 RS |
2541 | \f |
2542 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2543 | or are empty at BEG. |
2544 | ||
74514898 RS |
2545 | Return the number found, and store them in a vector in *VEC_PTR. |
2546 | Store in *LEN_PTR the size allocated for the vector. | |
2547 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2548 | or ZV if there are no more overlays. | |
2549 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2550 | or BEGV if there are no previous overlays. | |
2551 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2552 | ||
2553 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2554 | when this function is called. | |
2555 | ||
2556 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2557 | If EXTEND is zero, we never extend the vector, | |
2558 | and we store only as many overlays as will fit. | |
2559 | But we still return the total number of overlays. */ | |
2560 | ||
2561 | int | |
2562 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) | |
2563 | int beg, end; | |
2564 | int extend; | |
2565 | Lisp_Object **vec_ptr; | |
2566 | int *len_ptr; | |
2567 | int *next_ptr; | |
2568 | int *prev_ptr; | |
2569 | { | |
6af718a4 | 2570 | Lisp_Object tail, overlay, ostart, oend; |
74514898 RS |
2571 | int idx = 0; |
2572 | int len = *len_ptr; | |
2573 | Lisp_Object *vec = *vec_ptr; | |
2574 | int next = ZV; | |
2575 | int prev = BEGV; | |
2576 | int inhibit_storing = 0; | |
2577 | ||
2578 | for (tail = current_buffer->overlays_before; | |
2579 | GC_CONSP (tail); | |
7539e11f | 2580 | tail = XCDR (tail)) |
74514898 RS |
2581 | { |
2582 | int startpos, endpos; | |
2583 | ||
7539e11f | 2584 | overlay = XCAR (tail); |
74514898 RS |
2585 | |
2586 | ostart = OVERLAY_START (overlay); | |
2587 | oend = OVERLAY_END (overlay); | |
2588 | endpos = OVERLAY_POSITION (oend); | |
2589 | if (endpos < beg) | |
2590 | { | |
2591 | if (prev < endpos) | |
2592 | prev = endpos; | |
2593 | break; | |
2594 | } | |
2595 | startpos = OVERLAY_POSITION (ostart); | |
2596 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2597 | or is empty at the start of the range. */ |
74514898 | 2598 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2599 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2600 | { |
2601 | if (idx == len) | |
2602 | { | |
2603 | /* The supplied vector is full. | |
2604 | Either make it bigger, or don't store any more in it. */ | |
2605 | if (extend) | |
2606 | { | |
4b0e44fc RS |
2607 | /* Make it work with an initial len == 0. */ |
2608 | len *= 2; | |
2609 | if (len == 0) | |
2610 | len = 4; | |
2611 | *len_ptr = len; | |
74514898 RS |
2612 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2613 | *vec_ptr = vec; | |
2614 | } | |
2615 | else | |
2616 | inhibit_storing = 1; | |
2617 | } | |
2618 | ||
2619 | if (!inhibit_storing) | |
2620 | vec[idx] = overlay; | |
2621 | /* Keep counting overlays even if we can't return them all. */ | |
2622 | idx++; | |
2623 | } | |
2624 | else if (startpos < next) | |
2625 | next = startpos; | |
2626 | } | |
2627 | ||
2628 | for (tail = current_buffer->overlays_after; | |
2629 | GC_CONSP (tail); | |
7539e11f | 2630 | tail = XCDR (tail)) |
74514898 RS |
2631 | { |
2632 | int startpos, endpos; | |
2633 | ||
7539e11f | 2634 | overlay = XCAR (tail); |
74514898 RS |
2635 | |
2636 | ostart = OVERLAY_START (overlay); | |
2637 | oend = OVERLAY_END (overlay); | |
2638 | startpos = OVERLAY_POSITION (ostart); | |
2639 | if (end < startpos) | |
2640 | { | |
2641 | if (startpos < next) | |
2642 | next = startpos; | |
2643 | break; | |
2644 | } | |
2645 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2646 | /* Count an interval if it either overlaps the range |
2647 | or is empty at the start of the range. */ | |
74514898 | 2648 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2649 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2650 | { |
2651 | if (idx == len) | |
2652 | { | |
2653 | if (extend) | |
2654 | { | |
4b0e44fc RS |
2655 | /* Make it work with an initial len == 0. */ |
2656 | len *= 2; | |
2657 | if (len == 0) | |
2658 | len = 4; | |
2659 | *len_ptr = len; | |
74514898 RS |
2660 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2661 | *vec_ptr = vec; | |
2662 | } | |
2663 | else | |
2664 | inhibit_storing = 1; | |
2665 | } | |
2666 | ||
2667 | if (!inhibit_storing) | |
2668 | vec[idx] = overlay; | |
2669 | idx++; | |
2670 | } | |
2671 | else if (endpos < beg && endpos > prev) | |
2672 | prev = endpos; | |
2673 | } | |
fc04fa47 | 2674 | |
74514898 RS |
2675 | if (next_ptr) |
2676 | *next_ptr = next; | |
2677 | if (prev_ptr) | |
2678 | *prev_ptr = prev; | |
2679 | return idx; | |
2680 | } | |
09a22085 GM |
2681 | |
2682 | ||
2683 | /* Return non-zero if there exists an overlay with a non-nil | |
2684 | `mouse-face' property overlapping OVERLAY. */ | |
2685 | ||
2686 | int | |
2687 | mouse_face_overlay_overlaps (overlay) | |
2688 | Lisp_Object overlay; | |
2689 | { | |
2690 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2691 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2692 | int n, i, size; |
09a22085 GM |
2693 | Lisp_Object *v, tem; |
2694 | ||
bfd8410f GM |
2695 | size = 10; |
2696 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2697 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2698 | if (n > size) | |
09a22085 | 2699 | { |
09a22085 GM |
2700 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2701 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2702 | } | |
2703 | ||
2704 | for (i = 0; i < n; ++i) | |
2705 | if (!EQ (v[i], overlay) | |
2706 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2707 | !NILP (tem))) | |
2708 | break; | |
2709 | ||
2710 | return i < n; | |
2711 | } | |
2712 | ||
2713 | ||
74514898 | 2714 | \f |
fc04fa47 KH |
2715 | /* Fast function to just test if we're at an overlay boundary. */ |
2716 | int | |
2717 | overlay_touches_p (pos) | |
2718 | int pos; | |
2719 | { | |
2720 | Lisp_Object tail, overlay; | |
2721 | ||
2722 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); | |
7539e11f | 2723 | tail = XCDR (tail)) |
fc04fa47 KH |
2724 | { |
2725 | int endpos; | |
2726 | ||
7539e11f | 2727 | overlay = XCAR (tail); |
fc04fa47 KH |
2728 | if (!GC_OVERLAYP (overlay)) |
2729 | abort (); | |
2730 | ||
2731 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2732 | if (endpos < pos) | |
2733 | break; | |
2734 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2735 | return 1; | |
2736 | } | |
2737 | ||
2738 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); | |
7539e11f | 2739 | tail = XCDR (tail)) |
fc04fa47 KH |
2740 | { |
2741 | int startpos; | |
2742 | ||
7539e11f | 2743 | overlay = XCAR (tail); |
fc04fa47 KH |
2744 | if (!GC_OVERLAYP (overlay)) |
2745 | abort (); | |
2746 | ||
2747 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2748 | if (pos < startpos) | |
2749 | break; | |
2750 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2751 | return 1; | |
2752 | } | |
2753 | return 0; | |
2754 | } | |
2eec3b4e | 2755 | \f |
5985d248 KH |
2756 | struct sortvec |
2757 | { | |
2758 | Lisp_Object overlay; | |
2759 | int beg, end; | |
2760 | int priority; | |
2761 | }; | |
2762 | ||
2763 | static int | |
dfcf069d AS |
2764 | compare_overlays (v1, v2) |
2765 | const void *v1, *v2; | |
5985d248 | 2766 | { |
dfcf069d AS |
2767 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2768 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2769 | if (s1->priority != s2->priority) |
2770 | return s1->priority - s2->priority; | |
2771 | if (s1->beg != s2->beg) | |
2772 | return s1->beg - s2->beg; | |
2773 | if (s1->end != s2->end) | |
2774 | return s2->end - s1->end; | |
2775 | return 0; | |
2776 | } | |
2777 | ||
2778 | /* Sort an array of overlays by priority. The array is modified in place. | |
2779 | The return value is the new size; this may be smaller than the original | |
2780 | size if some of the overlays were invalid or were window-specific. */ | |
2781 | int | |
2782 | sort_overlays (overlay_vec, noverlays, w) | |
2783 | Lisp_Object *overlay_vec; | |
2784 | int noverlays; | |
2785 | struct window *w; | |
2786 | { | |
2787 | int i, j; | |
2788 | struct sortvec *sortvec; | |
2789 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2790 | ||
2791 | /* Put the valid and relevant overlays into sortvec. */ | |
2792 | ||
2793 | for (i = 0, j = 0; i < noverlays; i++) | |
2794 | { | |
0fa767e7 | 2795 | Lisp_Object tem; |
c99fc30f | 2796 | Lisp_Object overlay; |
5985d248 | 2797 | |
c99fc30f | 2798 | overlay = overlay_vec[i]; |
5985d248 KH |
2799 | if (OVERLAY_VALID (overlay) |
2800 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2801 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2802 | { | |
0fa767e7 KH |
2803 | /* If we're interested in a specific window, then ignore |
2804 | overlays that are limited to some other window. */ | |
2805 | if (w) | |
5985d248 | 2806 | { |
0fa767e7 KH |
2807 | Lisp_Object window; |
2808 | ||
2809 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2810 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2811 | continue; |
5985d248 | 2812 | } |
0fa767e7 KH |
2813 | |
2814 | /* This overlay is good and counts: put it into sortvec. */ | |
2815 | sortvec[j].overlay = overlay; | |
2816 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2817 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2818 | tem = Foverlay_get (overlay, Qpriority); | |
2819 | if (INTEGERP (tem)) | |
2820 | sortvec[j].priority = XINT (tem); | |
2821 | else | |
2822 | sortvec[j].priority = 0; | |
2823 | j++; | |
5985d248 KH |
2824 | } |
2825 | } | |
2826 | noverlays = j; | |
2827 | ||
2828 | /* Sort the overlays into the proper order: increasing priority. */ | |
2829 | ||
2830 | if (noverlays > 1) | |
2831 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2832 | ||
2833 | for (i = 0; i < noverlays; i++) | |
2834 | overlay_vec[i] = sortvec[i].overlay; | |
2835 | return (noverlays); | |
2836 | } | |
2837 | \f | |
bbbe9545 KH |
2838 | struct sortstr |
2839 | { | |
cb26008f | 2840 | Lisp_Object string, string2; |
bbbe9545 KH |
2841 | int size; |
2842 | int priority; | |
2843 | }; | |
2844 | ||
e8185fa8 KH |
2845 | struct sortstrlist |
2846 | { | |
2847 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2848 | int size; /* Allocated length of that array. */ | |
2849 | int used; /* How much of the array is currently in use. */ | |
2850 | int bytes; /* Total length of the strings in buf. */ | |
2851 | }; | |
2852 | ||
2853 | /* Buffers for storing information about the overlays touching a given | |
2854 | position. These could be automatic variables in overlay_strings, but | |
2855 | it's more efficient to hold onto the memory instead of repeatedly | |
2856 | allocating and freeing it. */ | |
2857 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2858 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2859 | |
2860 | /* Allocated length of overlay_str_buf. */ | |
2861 | static int overlay_str_len; | |
2862 | ||
bbbe9545 KH |
2863 | /* A comparison function suitable for passing to qsort. */ |
2864 | static int | |
2865 | cmp_for_strings (as1, as2) | |
2866 | char *as1, *as2; | |
2867 | { | |
2868 | struct sortstr *s1 = (struct sortstr *)as1; | |
2869 | struct sortstr *s2 = (struct sortstr *)as2; | |
2870 | if (s1->size != s2->size) | |
2871 | return s2->size - s1->size; | |
2872 | if (s1->priority != s2->priority) | |
2873 | return s1->priority - s2->priority; | |
2874 | return 0; | |
2875 | } | |
2876 | ||
e8185fa8 | 2877 | static void |
cb26008f | 2878 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2879 | struct sortstrlist *ssl; |
cb26008f | 2880 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2881 | int size; |
2882 | { | |
43d27a72 RS |
2883 | int nbytes; |
2884 | ||
e8185fa8 KH |
2885 | if (ssl->used == ssl->size) |
2886 | { | |
2887 | if (ssl->buf) | |
2888 | ssl->size *= 2; | |
2889 | else | |
2890 | ssl->size = 5; | |
2891 | ssl->buf = ((struct sortstr *) | |
2892 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2893 | } | |
2894 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2895 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2896 | ssl->buf[ssl->used].size = size; |
2897 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2898 | ssl->used++; | |
43d27a72 RS |
2899 | |
2900 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2901 | nbytes = SCHARS (str); |
43d27a72 | 2902 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2903 | nbytes = count_size_as_multibyte (SDATA (str), |
2904 | SBYTES (str)); | |
43d27a72 | 2905 | else |
d5db4077 | 2906 | nbytes = SBYTES (str); |
43d27a72 RS |
2907 | |
2908 | ssl->bytes += nbytes; | |
2909 | ||
cb26008f | 2910 | if (STRINGP (str2)) |
43d27a72 RS |
2911 | { |
2912 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2913 | nbytes = SCHARS (str2); |
43d27a72 | 2914 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2915 | nbytes = count_size_as_multibyte (SDATA (str2), |
2916 | SBYTES (str2)); | |
43d27a72 | 2917 | else |
d5db4077 | 2918 | nbytes = SBYTES (str2); |
43d27a72 RS |
2919 | |
2920 | ssl->bytes += nbytes; | |
2921 | } | |
e8185fa8 | 2922 | } |
bbbe9545 KH |
2923 | |
2924 | /* Return the concatenation of the strings associated with overlays that | |
2925 | begin or end at POS, ignoring overlays that are specific to a window | |
2926 | other than W. The strings are concatenated in the appropriate order: | |
2927 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
2928 | lower. Normally all of the after-strings come first, but zero-sized |
2929 | overlays have their after-strings ride along with the before-strings | |
2930 | because it would look strange to print them inside-out. | |
2931 | ||
2932 | Returns the string length, and stores the contents indirectly through | |
2933 | PSTR, if that variable is non-null. The string may be overwritten by | |
2934 | subsequent calls. */ | |
6b5d3b89 | 2935 | |
bbbe9545 KH |
2936 | int |
2937 | overlay_strings (pos, w, pstr) | |
2938 | int pos; | |
2939 | struct window *w; | |
6b5d3b89 | 2940 | unsigned char **pstr; |
bbbe9545 | 2941 | { |
e8185fa8 | 2942 | Lisp_Object ov, overlay, window, str; |
bbbe9545 | 2943 | int startpos, endpos; |
43d27a72 | 2944 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 2945 | |
e8185fa8 KH |
2946 | overlay_heads.used = overlay_heads.bytes = 0; |
2947 | overlay_tails.used = overlay_tails.bytes = 0; | |
7539e11f | 2948 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2949 | { |
7539e11f | 2950 | overlay = XCAR (ov); |
bbbe9545 KH |
2951 | if (!OVERLAYP (overlay)) |
2952 | abort (); | |
2953 | ||
2954 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2955 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2956 | if (endpos < pos) | |
2957 | break; | |
2958 | if (endpos != pos && startpos != pos) | |
2959 | continue; | |
2960 | window = Foverlay_get (overlay, Qwindow); | |
2961 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2962 | continue; | |
e8185fa8 KH |
2963 | if (startpos == pos |
2964 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2965 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2966 | (startpos == endpos |
2967 | ? Foverlay_get (overlay, Qafter_string) | |
2968 | : Qnil), | |
2969 | Foverlay_get (overlay, Qpriority), | |
2970 | endpos - startpos); | |
2971 | else if (endpos == pos | |
2972 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
2973 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
2974 | Foverlay_get (overlay, Qpriority), |
2975 | endpos - startpos); | |
bbbe9545 | 2976 | } |
7539e11f | 2977 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCDR (ov)) |
bbbe9545 | 2978 | { |
7539e11f | 2979 | overlay = XCAR (ov); |
bbbe9545 KH |
2980 | if (!OVERLAYP (overlay)) |
2981 | abort (); | |
2982 | ||
2983 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2984 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2985 | if (startpos > pos) | |
2986 | break; | |
e8185fa8 KH |
2987 | if (endpos != pos && startpos != pos) |
2988 | continue; | |
2989 | window = Foverlay_get (overlay, Qwindow); | |
2990 | if (WINDOWP (window) && XWINDOW (window) != w) | |
2991 | continue; | |
e8185fa8 KH |
2992 | if (startpos == pos |
2993 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
2994 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
2995 | (startpos == endpos |
2996 | ? Foverlay_get (overlay, Qafter_string) | |
2997 | : Qnil), | |
2998 | Foverlay_get (overlay, Qpriority), | |
2999 | endpos - startpos); | |
3000 | else if (endpos == pos | |
3001 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3002 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3003 | Foverlay_get (overlay, Qpriority), |
3004 | endpos - startpos); | |
bbbe9545 | 3005 | } |
e8185fa8 KH |
3006 | if (overlay_tails.used > 1) |
3007 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3008 | cmp_for_strings); | |
3009 | if (overlay_heads.used > 1) | |
3010 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3011 | cmp_for_strings); | |
3012 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3013 | { |
e8185fa8 | 3014 | Lisp_Object tem; |
bbbe9545 | 3015 | int i; |
9f4d7cde | 3016 | unsigned char *p; |
e8185fa8 | 3017 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3018 | |
3019 | if (total > overlay_str_len) | |
9f4d7cde RS |
3020 | { |
3021 | overlay_str_len = total; | |
3022 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3023 | total); | |
3024 | } | |
bbbe9545 | 3025 | p = overlay_str_buf; |
e8185fa8 | 3026 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3027 | { |
43d27a72 | 3028 | int nbytes; |
e8185fa8 | 3029 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3030 | nbytes = copy_text (SDATA (tem), p, |
3031 | SBYTES (tem), | |
43d27a72 RS |
3032 | STRING_MULTIBYTE (tem), multibyte); |
3033 | p += nbytes; | |
bbbe9545 | 3034 | } |
e8185fa8 | 3035 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3036 | { |
43d27a72 | 3037 | int nbytes; |
e8185fa8 | 3038 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3039 | nbytes = copy_text (SDATA (tem), p, |
3040 | SBYTES (tem), | |
43d27a72 RS |
3041 | STRING_MULTIBYTE (tem), multibyte); |
3042 | p += nbytes; | |
cb26008f KH |
3043 | tem = overlay_heads.buf[i].string2; |
3044 | if (STRINGP (tem)) | |
3045 | { | |
d5db4077 KR |
3046 | nbytes = copy_text (SDATA (tem), p, |
3047 | SBYTES (tem), | |
43d27a72 RS |
3048 | STRING_MULTIBYTE (tem), multibyte); |
3049 | p += nbytes; | |
cb26008f | 3050 | } |
bbbe9545 | 3051 | } |
cb26008f KH |
3052 | if (p != overlay_str_buf + total) |
3053 | abort (); | |
bbbe9545 KH |
3054 | if (pstr) |
3055 | *pstr = overlay_str_buf; | |
e8185fa8 | 3056 | return total; |
bbbe9545 | 3057 | } |
e8185fa8 | 3058 | return 0; |
bbbe9545 KH |
3059 | } |
3060 | \f | |
5c4f68f1 | 3061 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3062 | |
2eec3b4e | 3063 | void |
5c4f68f1 JB |
3064 | recenter_overlay_lists (buf, pos) |
3065 | struct buffer *buf; | |
2eec3b4e RS |
3066 | int pos; |
3067 | { | |
3068 | Lisp_Object overlay, tail, next, prev, beg, end; | |
3069 | ||
3070 | /* See if anything in overlays_before should move to overlays_after. */ | |
3071 | ||
3072 | /* We don't strictly need prev in this loop; it should always be nil. | |
3073 | But we use it for symmetry and in case that should cease to be true | |
3074 | with some future change. */ | |
3075 | prev = Qnil; | |
5c4f68f1 | 3076 | for (tail = buf->overlays_before; |
2eec3b4e RS |
3077 | CONSP (tail); |
3078 | prev = tail, tail = next) | |
1ab256cb | 3079 | { |
7539e11f KR |
3080 | next = XCDR (tail); |
3081 | overlay = XCAR (tail); | |
2eec3b4e RS |
3082 | |
3083 | /* If the overlay is not valid, get rid of it. */ | |
3084 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3085 | #if 1 |
3086 | abort (); | |
3087 | #else | |
2eec3b4e RS |
3088 | { |
3089 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3090 | if (!NILP (prev)) | |
7539e11f | 3091 | XCDR (prev) = next; |
2eec3b4e | 3092 | else |
5c4f68f1 | 3093 | buf->overlays_before = next; |
2eec3b4e RS |
3094 | tail = prev; |
3095 | continue; | |
3096 | } | |
52f8ec73 | 3097 | #endif |
1ab256cb | 3098 | |
2eec3b4e RS |
3099 | beg = OVERLAY_START (overlay); |
3100 | end = OVERLAY_END (overlay); | |
1ab256cb | 3101 | |
2eec3b4e | 3102 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3103 | { |
2eec3b4e RS |
3104 | /* OVERLAY needs to be moved. */ |
3105 | int where = OVERLAY_POSITION (beg); | |
3106 | Lisp_Object other, other_prev; | |
3107 | ||
3108 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3109 | if (!NILP (prev)) | |
f3fbd155 | 3110 | XSETCDR (prev, next); |
2eec3b4e | 3111 | else |
5c4f68f1 | 3112 | buf->overlays_before = next; |
2eec3b4e RS |
3113 | |
3114 | /* Search thru overlays_after for where to put it. */ | |
3115 | other_prev = Qnil; | |
5c4f68f1 | 3116 | for (other = buf->overlays_after; |
2eec3b4e | 3117 | CONSP (other); |
7539e11f | 3118 | other_prev = other, other = XCDR (other)) |
1ab256cb | 3119 | { |
6af718a4 | 3120 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3121 | |
7539e11f | 3122 | otheroverlay = XCAR (other); |
2eec3b4e | 3123 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3124 | abort (); |
2eec3b4e RS |
3125 | |
3126 | otherbeg = OVERLAY_START (otheroverlay); | |
3127 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3128 | break; | |
1ab256cb | 3129 | } |
2eec3b4e RS |
3130 | |
3131 | /* Add TAIL to overlays_after before OTHER. */ | |
f3fbd155 | 3132 | XSETCDR (tail, other); |
2eec3b4e | 3133 | if (!NILP (other_prev)) |
f3fbd155 | 3134 | XSETCDR (other_prev, tail); |
1ab256cb | 3135 | else |
5c4f68f1 | 3136 | buf->overlays_after = tail; |
2eec3b4e | 3137 | tail = prev; |
1ab256cb | 3138 | } |
2eec3b4e RS |
3139 | else |
3140 | /* We've reached the things that should stay in overlays_before. | |
3141 | All the rest of overlays_before must end even earlier, | |
3142 | so stop now. */ | |
3143 | break; | |
3144 | } | |
3145 | ||
3146 | /* See if anything in overlays_after should be in overlays_before. */ | |
3147 | prev = Qnil; | |
5c4f68f1 | 3148 | for (tail = buf->overlays_after; |
2eec3b4e RS |
3149 | CONSP (tail); |
3150 | prev = tail, tail = next) | |
3151 | { | |
7539e11f KR |
3152 | next = XCDR (tail); |
3153 | overlay = XCAR (tail); | |
2eec3b4e RS |
3154 | |
3155 | /* If the overlay is not valid, get rid of it. */ | |
3156 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3157 | #if 1 |
3158 | abort (); | |
3159 | #else | |
2eec3b4e RS |
3160 | { |
3161 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3162 | if (!NILP (prev)) | |
7539e11f | 3163 | XCDR (prev) = next; |
2eec3b4e | 3164 | else |
5c4f68f1 | 3165 | buf->overlays_after = next; |
2eec3b4e RS |
3166 | tail = prev; |
3167 | continue; | |
3168 | } | |
52f8ec73 | 3169 | #endif |
2eec3b4e RS |
3170 | |
3171 | beg = OVERLAY_START (overlay); | |
3172 | end = OVERLAY_END (overlay); | |
3173 | ||
3174 | /* Stop looking, when we know that nothing further | |
3175 | can possibly end before POS. */ | |
3176 | if (OVERLAY_POSITION (beg) > pos) | |
3177 | break; | |
3178 | ||
3179 | if (OVERLAY_POSITION (end) <= pos) | |
3180 | { | |
3181 | /* OVERLAY needs to be moved. */ | |
3182 | int where = OVERLAY_POSITION (end); | |
3183 | Lisp_Object other, other_prev; | |
3184 | ||
3185 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3186 | if (!NILP (prev)) | |
f3fbd155 | 3187 | XSETCDR (prev, next); |
2eec3b4e | 3188 | else |
5c4f68f1 | 3189 | buf->overlays_after = next; |
2eec3b4e RS |
3190 | |
3191 | /* Search thru overlays_before for where to put it. */ | |
3192 | other_prev = Qnil; | |
5c4f68f1 | 3193 | for (other = buf->overlays_before; |
2eec3b4e | 3194 | CONSP (other); |
7539e11f | 3195 | other_prev = other, other = XCDR (other)) |
2eec3b4e RS |
3196 | { |
3197 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3198 | |
7539e11f | 3199 | otheroverlay = XCAR (other); |
2eec3b4e | 3200 | if (! OVERLAY_VALID (otheroverlay)) |
52f8ec73 | 3201 | abort (); |
2eec3b4e RS |
3202 | |
3203 | otherend = OVERLAY_END (otheroverlay); | |
3204 | if (OVERLAY_POSITION (otherend) <= where) | |
3205 | break; | |
3206 | } | |
3207 | ||
3208 | /* Add TAIL to overlays_before before OTHER. */ | |
f3fbd155 | 3209 | XSETCDR (tail, other); |
2eec3b4e | 3210 | if (!NILP (other_prev)) |
f3fbd155 | 3211 | XSETCDR (other_prev, tail); |
2eec3b4e | 3212 | else |
5c4f68f1 | 3213 | buf->overlays_before = tail; |
2eec3b4e RS |
3214 | tail = prev; |
3215 | } | |
3216 | } | |
3217 | ||
8d7a4592 | 3218 | XSETFASTINT (buf->overlay_center, pos); |
2eec3b4e | 3219 | } |
2b1bdf65 | 3220 | |
423cdb46 KH |
3221 | void |
3222 | adjust_overlays_for_insert (pos, length) | |
3223 | int pos; | |
3224 | int length; | |
3225 | { | |
3226 | /* After an insertion, the lists are still sorted properly, | |
3227 | but we may need to update the value of the overlay center. */ | |
3228 | if (XFASTINT (current_buffer->overlay_center) >= pos) | |
3229 | XSETFASTINT (current_buffer->overlay_center, | |
3230 | XFASTINT (current_buffer->overlay_center) + length); | |
3231 | } | |
3232 | ||
3233 | void | |
3234 | adjust_overlays_for_delete (pos, length) | |
3235 | int pos; | |
3236 | int length; | |
3237 | { | |
3238 | if (XFASTINT (current_buffer->overlay_center) < pos) | |
3239 | /* The deletion was to our right. No change needed; the before- and | |
3240 | after-lists are still consistent. */ | |
3241 | ; | |
3242 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) | |
3243 | /* The deletion was to our left. We need to adjust the center value | |
3244 | to account for the change in position, but the lists are consistent | |
3245 | given the new value. */ | |
3246 | XSETFASTINT (current_buffer->overlay_center, | |
3247 | XFASTINT (current_buffer->overlay_center) - length); | |
3248 | else | |
3249 | /* We're right in the middle. There might be things on the after-list | |
3250 | that now belong on the before-list. Recentering will move them, | |
3251 | and also update the center point. */ | |
3252 | recenter_overlay_lists (current_buffer, pos); | |
3253 | } | |
3254 | ||
2b1bdf65 KH |
3255 | /* Fix up overlays that were garbled as a result of permuting markers |
3256 | in the range START through END. Any overlay with at least one | |
3257 | endpoint in this range will need to be unlinked from the overlay | |
3258 | list and reinserted in its proper place. | |
3259 | Such an overlay might even have negative size at this point. | |
3260 | If so, we'll reverse the endpoints. Can you think of anything | |
3261 | better to do in this situation? */ | |
3262 | void | |
3263 | fix_overlays_in_range (start, end) | |
3264 | register int start, end; | |
3265 | { | |
6af718a4 | 3266 | Lisp_Object overlay; |
2b1bdf65 | 3267 | Lisp_Object before_list, after_list; |
1138e742 KR |
3268 | /* These are either nil, indicating that before_list or after_list |
3269 | should be assigned, or the cons cell the cdr of which should be | |
3270 | assigned. */ | |
3271 | Lisp_Object beforep = Qnil, afterp = Qnil; | |
3272 | /* 'Parent', likewise, indicates a cons cell or | |
3273 | current_buffer->overlays_before or overlays_after, depending | |
3274 | which loop we're in. */ | |
3275 | Lisp_Object tail, parent; | |
2b1bdf65 KH |
3276 | int startpos, endpos; |
3277 | ||
3278 | /* This algorithm shifts links around instead of consing and GCing. | |
3279 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3280 | well-formed list except that its last element, the CDR of beforep |
3281 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3282 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3283 | that before_list isn't initialized, although it may look | |
3284 | strange. */ | |
3285 | for (parent = Qnil, tail = current_buffer->overlays_before; CONSP (tail);) | |
2b1bdf65 | 3286 | { |
1138e742 | 3287 | overlay = XCAR (tail); |
2b1bdf65 KH |
3288 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3289 | if (endpos < start) | |
3290 | break; | |
3291 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3292 | if (endpos < end | |
3293 | || (startpos >= start && startpos < end)) | |
3294 | { | |
3295 | /* If the overlay is backwards, fix that now. */ | |
3296 | if (startpos > endpos) | |
3297 | { | |
3298 | int tem; | |
2c99f3ea RS |
3299 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3300 | Qnil); | |
3301 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3302 | Qnil); | |
2b1bdf65 KH |
3303 | tem = startpos; startpos = endpos; endpos = tem; |
3304 | } | |
3305 | /* Add it to the end of the wrong list. Later on, | |
3306 | recenter_overlay_lists will move it to the right place. */ | |
3307 | if (endpos < XINT (current_buffer->overlay_center)) | |
3308 | { | |
1138e742 KR |
3309 | if (NILP (afterp)) |
3310 | after_list = tail; | |
3311 | else | |
3312 | XSETCDR (afterp, tail); | |
3313 | afterp = tail; | |
2b1bdf65 KH |
3314 | } |
3315 | else | |
3316 | { | |
1138e742 KR |
3317 | if (NILP (beforep)) |
3318 | before_list = tail; | |
3319 | else | |
3320 | XSETCDR (beforep, tail); | |
3321 | beforep = tail; | |
2b1bdf65 | 3322 | } |
1138e742 KR |
3323 | if (NILP (parent)) |
3324 | current_buffer->overlays_before = XCDR (tail); | |
3325 | else | |
3326 | XSETCDR (parent, XCDR (tail)); | |
3327 | tail = XCDR (tail); | |
2b1bdf65 KH |
3328 | } |
3329 | else | |
1138e742 | 3330 | parent = tail, tail = XCDR (parent); |
2b1bdf65 | 3331 | } |
1138e742 | 3332 | for (parent = Qnil, tail = current_buffer->overlays_after; CONSP (tail);) |
2b1bdf65 | 3333 | { |
1138e742 | 3334 | overlay = XCAR (tail); |
2b1bdf65 KH |
3335 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3336 | if (startpos >= end) | |
3337 | break; | |
3338 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3339 | if (startpos >= start | |
3340 | || (endpos >= start && endpos < end)) | |
3341 | { | |
3342 | if (startpos > endpos) | |
3343 | { | |
3344 | int tem; | |
2c99f3ea RS |
3345 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
3346 | Qnil); | |
3347 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), | |
3348 | Qnil); | |
2b1bdf65 KH |
3349 | tem = startpos; startpos = endpos; endpos = tem; |
3350 | } | |
3351 | if (endpos < XINT (current_buffer->overlay_center)) | |
3352 | { | |
1138e742 KR |
3353 | if (NILP (afterp)) |
3354 | after_list = tail; | |
3355 | else | |
3356 | XSETCDR (afterp, tail); | |
3357 | afterp = tail; | |
2b1bdf65 KH |
3358 | } |
3359 | else | |
3360 | { | |
1138e742 KR |
3361 | if (NILP (beforep)) |
3362 | before_list = tail; | |
3363 | else | |
3364 | XSETCDR (beforep, tail); | |
3365 | beforep = tail; | |
2b1bdf65 | 3366 | } |
1138e742 KR |
3367 | if (NILP (parent)) |
3368 | current_buffer->overlays_after = XCDR (tail); | |
3369 | else | |
3370 | XSETCDR (parent, XCDR (tail)); | |
3371 | tail = XCDR (tail); | |
2b1bdf65 KH |
3372 | } |
3373 | else | |
1138e742 | 3374 | parent = tail, tail = XCDR (parent); |
2b1bdf65 KH |
3375 | } |
3376 | ||
3377 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3378 | and let the recenter function make it sane again. */ | |
1138e742 KR |
3379 | if (!NILP (beforep)) |
3380 | { | |
3381 | XSETCDR (beforep, current_buffer->overlays_before); | |
3382 | current_buffer->overlays_before = before_list; | |
3383 | } | |
2b1bdf65 KH |
3384 | recenter_overlay_lists (current_buffer, |
3385 | XINT (current_buffer->overlay_center)); | |
3386 | ||
1138e742 KR |
3387 | if (!NILP (afterp)) |
3388 | { | |
3389 | XSETCDR (afterp, current_buffer->overlays_after); | |
3390 | current_buffer->overlays_after = after_list; | |
3391 | } | |
2b1bdf65 KH |
3392 | recenter_overlay_lists (current_buffer, |
3393 | XINT (current_buffer->overlay_center)); | |
3394 | } | |
3b06f880 KH |
3395 | |
3396 | /* We have two types of overlay: the one whose ending marker is | |
3397 | after-insertion-marker (this is the usual case) and the one whose | |
3398 | ending marker is before-insertion-marker. When `overlays_before' | |
3399 | contains overlays of the latter type and the former type in this | |
3400 | order and both overlays end at inserting position, inserting a text | |
3401 | increases only the ending marker of the latter type, which results | |
3402 | in incorrect ordering of `overlays_before'. | |
3403 | ||
3404 | This function fixes ordering of overlays in the slot | |
3405 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3406 | was at PREV, and now is at POS. */ | |
3407 | ||
01136e9b | 3408 | void |
3b06f880 KH |
3409 | fix_overlays_before (bp, prev, pos) |
3410 | struct buffer *bp; | |
3411 | int prev, pos; | |
3412 | { | |
1138e742 KR |
3413 | /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */ |
3414 | Lisp_Object tail = bp->overlays_before, parent = Qnil; | |
3415 | Lisp_Object right_pair; | |
3b06f880 KH |
3416 | int end; |
3417 | ||
3418 | /* After the insertion, the several overlays may be in incorrect | |
3419 | order. The possibility is that, in the list `overlays_before', | |
3420 | an overlay which ends at POS appears after an overlay which ends | |
3421 | at PREV. Since POS is greater than PREV, we must fix the | |
3422 | ordering of these overlays, by moving overlays ends at POS before | |
3423 | the overlays ends at PREV. */ | |
3424 | ||
3425 | /* At first, find a place where disordered overlays should be linked | |
3426 | in. It is where an overlay which end before POS exists. (i.e. an | |
3427 | overlay whose ending marker is after-insertion-marker if disorder | |
3428 | exists). */ | |
1138e742 KR |
3429 | while (!NILP (tail) |
3430 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCAR (tail)))) | |
3b06f880 | 3431 | >= pos)) |
1138e742 KR |
3432 | { |
3433 | parent = tail; | |
3434 | tail = XCDR (tail); | |
3435 | } | |
3b06f880 KH |
3436 | |
3437 | /* If we don't find such an overlay, | |
3438 | or the found one ends before PREV, | |
3439 | or the found one is the last one in the list, | |
3440 | we don't have to fix anything. */ | |
1138e742 | 3441 | if (NILP (tail) |
3b06f880 | 3442 | || end < prev |
1138e742 | 3443 | || NILP (XCDR (tail))) |
3b06f880 KH |
3444 | return; |
3445 | ||
1138e742 KR |
3446 | right_pair = parent; |
3447 | parent = tail; | |
3448 | tail = XCDR (tail); | |
3b06f880 | 3449 | |
1138e742 | 3450 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3451 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3452 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3453 | we found an overlay which ends before PREV, the remaining | |
3454 | overlays are in correct order. */ | |
3455 | while (!NILP (tail)) | |
3b06f880 | 3456 | { |
1138e742 | 3457 | end = OVERLAY_POSITION (OVERLAY_END (XCAR (tail))); |
3b06f880 KH |
3458 | |
3459 | if (end == pos) | |
3460 | { /* This overlay is disordered. */ | |
1138e742 | 3461 | Lisp_Object found = tail; |
3b06f880 KH |
3462 | |
3463 | /* Unlink the found overlay. */ | |
504322ad KR |
3464 | tail = XCDR (found); |
3465 | XSETCDR (parent, tail); | |
1138e742 KR |
3466 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3467 | and link it into the right place. */ | |
3468 | if (NILP (right_pair)) | |
3469 | { | |
3470 | XSETCDR (found, bp->overlays_before); | |
3471 | bp->overlays_before = found; | |
3472 | } | |
3473 | else | |
3474 | { | |
3475 | XSETCDR (found, XCDR (right_pair)); | |
3476 | XSETCDR (right_pair, found); | |
3477 | } | |
3b06f880 KH |
3478 | } |
3479 | else if (end == prev) | |
1138e742 KR |
3480 | { |
3481 | parent = tail; | |
3482 | tail = XCDR (tail); | |
3483 | } | |
3b06f880 KH |
3484 | else /* No more disordered overlay. */ |
3485 | break; | |
3486 | } | |
3487 | } | |
2eec3b4e | 3488 | \f |
52f8ec73 | 3489 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3490 | doc: /* Return t if OBJECT is an overlay. */) |
3491 | (object) | |
52f8ec73 JB |
3492 | Lisp_Object object; |
3493 | { | |
3494 | return (OVERLAYP (object) ? Qt : Qnil); | |
3495 | } | |
3496 | ||
acac2700 | 3497 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3498 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3499 | If omitted, BUFFER defaults to the current buffer. |
3500 | BEG and END may be integers or markers. | |
3501 | The fourth arg FRONT-ADVANCE, if non-nil, makes the | |
3502 | front delimiter advance when text is inserted there. | |
3503 | The fifth arg REAR-ADVANCE, if non-nil, makes the | |
7ee72033 MB |
3504 | rear delimiter advance when text is inserted there. */) |
3505 | (beg, end, buffer, front_advance, rear_advance) | |
5c4f68f1 | 3506 | Lisp_Object beg, end, buffer; |
acac2700 | 3507 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3508 | { |
3509 | Lisp_Object overlay; | |
5c4f68f1 | 3510 | struct buffer *b; |
2eec3b4e | 3511 | |
5c4f68f1 | 3512 | if (NILP (buffer)) |
67180c6a | 3513 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3514 | else |
b7826503 | 3515 | CHECK_BUFFER (buffer); |
883047b9 JB |
3516 | if (MARKERP (beg) |
3517 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3518 | error ("Marker points into wrong buffer"); | |
3519 | if (MARKERP (end) | |
3520 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3521 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3522 | |
b7826503 PJ |
3523 | CHECK_NUMBER_COERCE_MARKER (beg); |
3524 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3525 | |
883047b9 | 3526 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3527 | { |
c99fc30f KH |
3528 | Lisp_Object temp; |
3529 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3530 | } |
883047b9 JB |
3531 | |
3532 | b = XBUFFER (buffer); | |
3533 | ||
3534 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3535 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3536 | |
acac2700 RS |
3537 | if (!NILP (front_advance)) |
3538 | XMARKER (beg)->insertion_type = 1; | |
3539 | if (!NILP (rear_advance)) | |
3540 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3541 | |
48e2e3ba | 3542 | overlay = allocate_misc (); |
89ca3e1b | 3543 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3544 | XOVERLAY (overlay)->start = beg; |
3545 | XOVERLAY (overlay)->end = end; | |
3546 | XOVERLAY (overlay)->plist = Qnil; | |
2eec3b4e RS |
3547 | |
3548 | /* Put the new overlay on the wrong list. */ | |
3549 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3550 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3551 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3552 | else |
5c4f68f1 | 3553 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3554 | |
3555 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3556 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3557 | |
b61982dd JB |
3558 | /* We don't need to redisplay the region covered by the overlay, because |
3559 | the overlay has no properties at the moment. */ | |
3560 | ||
2eec3b4e RS |
3561 | return overlay; |
3562 | } | |
876aa27c RS |
3563 | \f |
3564 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3565 | ||
3566 | static void | |
3567 | modify_overlay (buf, start, end) | |
3568 | struct buffer *buf; | |
3569 | int start, end; | |
3570 | { | |
876aa27c RS |
3571 | if (start > end) |
3572 | { | |
3573 | int temp = start; | |
26f545d7 GM |
3574 | start = end; |
3575 | end = temp; | |
876aa27c RS |
3576 | } |
3577 | ||
481b5054 GM |
3578 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
3579 | ||
876aa27c RS |
3580 | /* If this is a buffer not in the selected window, |
3581 | we must do other windows. */ | |
3582 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3583 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3584 | /* If multiple windows show this buffer, we must do other windows. */ |
3585 | else if (buffer_shared > 1) | |
3586 | windows_or_buffers_changed = 1; | |
876aa27c | 3587 | |
d8b9150f | 3588 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3589 | } |
2eec3b4e | 3590 | |
018ba359 | 3591 | \f |
2e34157c RS |
3592 | Lisp_Object Fdelete_overlay (); |
3593 | ||
5c4f68f1 | 3594 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3595 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3596 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3597 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3598 | buffer. */) |
3599 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3600 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3601 | { |
0a4469c9 RS |
3602 | struct buffer *b, *ob; |
3603 | Lisp_Object obuffer; | |
aed13378 | 3604 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3605 | |
b7826503 | 3606 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3607 | if (NILP (buffer)) |
3608 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3609 | if (NILP (buffer)) |
67180c6a | 3610 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3611 | CHECK_BUFFER (buffer); |
883047b9 JB |
3612 | |
3613 | if (MARKERP (beg) | |
3614 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3615 | error ("Marker points into wrong buffer"); | |
3616 | if (MARKERP (end) | |
3617 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3618 | error ("Marker points into wrong buffer"); | |
3619 | ||
b7826503 PJ |
3620 | CHECK_NUMBER_COERCE_MARKER (beg); |
3621 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3622 | |
9d7608b7 KH |
3623 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3624 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3625 | |
b61982dd JB |
3626 | if (XINT (beg) > XINT (end)) |
3627 | { | |
c99fc30f KH |
3628 | Lisp_Object temp; |
3629 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3630 | } |
3631 | ||
9d7608b7 KH |
3632 | specbind (Qinhibit_quit, Qt); |
3633 | ||
0a4469c9 | 3634 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3635 | b = XBUFFER (buffer); |
8801a864 | 3636 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3637 | |
c82ed728 | 3638 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3639 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3640 | { |
3641 | /* Redisplay where the overlay was. */ | |
3642 | if (!NILP (obuffer)) | |
3643 | { | |
2e34157c RS |
3644 | int o_beg; |
3645 | int o_end; | |
50760c4a | 3646 | |
80509f2f RS |
3647 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3648 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3649 | |
2e34157c | 3650 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3651 | } |
3652 | ||
3653 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3654 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3655 | } |
c82ed728 JB |
3656 | else |
3657 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3658 | { | |
2e34157c | 3659 | int o_beg, o_end; |
c82ed728 | 3660 | |
80509f2f RS |
3661 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3662 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3663 | |
2e34157c RS |
3664 | if (o_beg == XINT (beg)) |
3665 | modify_overlay (b, o_end, XINT (end)); | |
3666 | else if (o_end == XINT (end)) | |
3667 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3668 | else |
3669 | { | |
2e34157c RS |
3670 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3671 | if (XINT (end) > o_end) o_end = XINT (end); | |
3672 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3673 | } |
3674 | } | |
b61982dd | 3675 | |
0a4469c9 RS |
3676 | if (!NILP (obuffer)) |
3677 | { | |
3678 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); | |
3679 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); | |
3680 | } | |
5c4f68f1 JB |
3681 | |
3682 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3683 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e RS |
3684 | |
3685 | /* Put the overlay on the wrong list. */ | |
3686 | end = OVERLAY_END (overlay); | |
5c4f68f1 JB |
3687 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
3688 | b->overlays_after = Fcons (overlay, b->overlays_after); | |
2eec3b4e | 3689 | else |
5c4f68f1 | 3690 | b->overlays_before = Fcons (overlay, b->overlays_before); |
2eec3b4e RS |
3691 | |
3692 | /* This puts it in the right list, and in the right order. */ | |
5c4f68f1 | 3693 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
2eec3b4e | 3694 | |
0a4469c9 | 3695 | return unbind_to (count, overlay); |
2eec3b4e RS |
3696 | } |
3697 | ||
3698 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3699 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3700 | (overlay) | |
5c4f68f1 | 3701 | Lisp_Object overlay; |
2eec3b4e | 3702 | { |
0a4469c9 | 3703 | Lisp_Object buffer; |
5c4f68f1 | 3704 | struct buffer *b; |
aed13378 | 3705 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3706 | |
b7826503 | 3707 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3708 | |
0a4469c9 RS |
3709 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3710 | if (NILP (buffer)) | |
3711 | return Qnil; | |
3712 | ||
3713 | b = XBUFFER (buffer); | |
0a4469c9 | 3714 | specbind (Qinhibit_quit, Qt); |
26f545d7 | 3715 | |
5c4f68f1 | 3716 | b->overlays_before = Fdelq (overlay, b->overlays_before); |
26f545d7 | 3717 | b->overlays_after = Fdelq (overlay, b->overlays_after); |
876aa27c | 3718 | modify_overlay (b, |
8231a9aa RS |
3719 | marker_position (OVERLAY_START (overlay)), |
3720 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3721 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3722 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3723 | ||
e58c389d | 3724 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3725 | display optimizations for the affected buffer, on the basis that |
3726 | these strings may contain newlines. This is easier to do than to | |
3727 | check for that situation during redisplay. */ | |
3728 | if (!windows_or_buffers_changed | |
3729 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3730 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3731 | b->prevent_redisplay_optimizations_p = 1; | |
3732 | ||
0a4469c9 | 3733 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3734 | } |
3735 | \f | |
8ebafa8d JB |
3736 | /* Overlay dissection functions. */ |
3737 | ||
3738 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3739 | doc: /* Return the position at which OVERLAY starts. */) |
3740 | (overlay) | |
8ebafa8d JB |
3741 | Lisp_Object overlay; |
3742 | { | |
b7826503 | 3743 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3744 | |
3745 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3746 | } | |
3747 | ||
3748 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3749 | doc: /* Return the position at which OVERLAY ends. */) |
3750 | (overlay) | |
8ebafa8d JB |
3751 | Lisp_Object overlay; |
3752 | { | |
b7826503 | 3753 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3754 | |
3755 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3756 | } | |
3757 | ||
3758 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
7ee72033 MB |
3759 | doc: /* Return the buffer OVERLAY belongs to. */) |
3760 | (overlay) | |
8ebafa8d JB |
3761 | Lisp_Object overlay; |
3762 | { | |
b7826503 | 3763 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3764 | |
3765 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3766 | } | |
3767 | ||
3768 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3769 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3770 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3771 | OVERLAY. */) |
3772 | (overlay) | |
8ebafa8d JB |
3773 | Lisp_Object overlay; |
3774 | { | |
b7826503 | 3775 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3776 | |
48e2e3ba | 3777 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3778 | } |
3779 | ||
3780 | \f | |
2eec3b4e | 3781 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3782 | doc: /* Return a list of the overlays that contain position POS. */) |
3783 | (pos) | |
2eec3b4e RS |
3784 | Lisp_Object pos; |
3785 | { | |
3786 | int noverlays; | |
2eec3b4e RS |
3787 | Lisp_Object *overlay_vec; |
3788 | int len; | |
3789 | Lisp_Object result; | |
3790 | ||
b7826503 | 3791 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3792 | |
3793 | len = 10; | |
a9800ae8 | 3794 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3795 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3796 | ||
3797 | /* Put all the overlays we want in a vector in overlay_vec. | |
3798 | Store the length in len. */ | |
2a77a7d7 | 3799 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3800 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3801 | |
3802 | /* Make a list of them all. */ | |
3803 | result = Flist (noverlays, overlay_vec); | |
3804 | ||
9ac0d9e0 | 3805 | xfree (overlay_vec); |
2eec3b4e RS |
3806 | return result; |
3807 | } | |
3808 | ||
74514898 | 3809 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3810 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3811 | Overlap means that at least one character is contained within the overlay |
3812 | and also contained within the specified region. | |
3813 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3814 | or between BEG and END. */) |
3815 | (beg, end) | |
74514898 RS |
3816 | Lisp_Object beg, end; |
3817 | { | |
3818 | int noverlays; | |
3819 | Lisp_Object *overlay_vec; | |
3820 | int len; | |
3821 | Lisp_Object result; | |
3822 | ||
b7826503 PJ |
3823 | CHECK_NUMBER_COERCE_MARKER (beg); |
3824 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3825 | |
3826 | len = 10; | |
3827 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3828 | ||
3829 | /* Put all the overlays we want in a vector in overlay_vec. | |
3830 | Store the length in len. */ | |
3831 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3832 | (int *) 0, (int *) 0); | |
3833 | ||
3834 | /* Make a list of them all. */ | |
3835 | result = Flist (noverlays, overlay_vec); | |
3836 | ||
3837 | xfree (overlay_vec); | |
3838 | return result; | |
3839 | } | |
3840 | ||
2eec3b4e | 3841 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3842 | 1, 1, 0, |
7ee72033 MB |
3843 | doc: /* Return the next position after POS where an overlay starts or ends. |
3844 | If there are no more overlay boundaries after POS, return (point-max). */) | |
3845 | (pos) | |
2eec3b4e RS |
3846 | Lisp_Object pos; |
3847 | { | |
3848 | int noverlays; | |
3849 | int endpos; | |
3850 | Lisp_Object *overlay_vec; | |
3851 | int len; | |
2eec3b4e RS |
3852 | int i; |
3853 | ||
b7826503 | 3854 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3855 | |
3856 | len = 10; | |
3857 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3858 | ||
3859 | /* Put all the overlays we want in a vector in overlay_vec. | |
3860 | Store the length in len. | |
3861 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3862 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3863 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3864 | |
3865 | /* If any of these overlays ends before endpos, | |
3866 | use its ending point instead. */ | |
3867 | for (i = 0; i < noverlays; i++) | |
3868 | { | |
3869 | Lisp_Object oend; | |
3870 | int oendpos; | |
3871 | ||
3872 | oend = OVERLAY_END (overlay_vec[i]); | |
3873 | oendpos = OVERLAY_POSITION (oend); | |
3874 | if (oendpos < endpos) | |
3875 | endpos = oendpos; | |
1ab256cb RM |
3876 | } |
3877 | ||
9ac0d9e0 | 3878 | xfree (overlay_vec); |
2eec3b4e RS |
3879 | return make_number (endpos); |
3880 | } | |
239c932b RS |
3881 | |
3882 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
3883 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 MB |
3884 | doc: /* Return the previous position before POS where an overlay starts or ends. |
3885 | If there are no more overlay boundaries before POS, return (point-min). */) | |
3886 | (pos) | |
239c932b RS |
3887 | Lisp_Object pos; |
3888 | { | |
3889 | int noverlays; | |
3890 | int prevpos; | |
3891 | Lisp_Object *overlay_vec; | |
3892 | int len; | |
239c932b | 3893 | |
b7826503 | 3894 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3895 | |
624bbdc4 RS |
3896 | /* At beginning of buffer, we know the answer; |
3897 | avoid bug subtracting 1 below. */ | |
3898 | if (XINT (pos) == BEGV) | |
3899 | return pos; | |
3900 | ||
017f0539 GM |
3901 | len = 10; |
3902 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3903 | ||
239c932b RS |
3904 | /* Put all the overlays we want in a vector in overlay_vec. |
3905 | Store the length in len. | |
daa1c109 | 3906 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 3907 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3908 | (int *) 0, &prevpos, 1); |
239c932b | 3909 | |
239c932b RS |
3910 | xfree (overlay_vec); |
3911 | return make_number (prevpos); | |
3912 | } | |
2eec3b4e RS |
3913 | \f |
3914 | /* These functions are for debugging overlays. */ | |
3915 | ||
3916 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 3917 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
3918 | The car has all the overlays before the overlay center; |
3919 | the cdr has all the overlays after the overlay center. | |
3920 | Recentering overlays moves overlays between these lists. | |
3921 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
3922 | However, the overlays you get are the real objects that the buffer uses. */) |
3923 | () | |
2eec3b4e RS |
3924 | { |
3925 | Lisp_Object before, after; | |
3926 | before = current_buffer->overlays_before; | |
3927 | if (CONSP (before)) | |
3928 | before = Fcopy_sequence (before); | |
3929 | after = current_buffer->overlays_after; | |
3930 | if (CONSP (after)) | |
3931 | after = Fcopy_sequence (after); | |
3932 | ||
3933 | return Fcons (before, after); | |
3934 | } | |
3935 | ||
3936 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
7ee72033 MB |
3937 | doc: /* Recenter the overlays of the current buffer around position POS. */) |
3938 | (pos) | |
2eec3b4e RS |
3939 | Lisp_Object pos; |
3940 | { | |
b7826503 | 3941 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 3942 | |
5c4f68f1 | 3943 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
3944 | return Qnil; |
3945 | } | |
3946 | \f | |
3947 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
3948 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
3949 | (overlay, prop) | |
2eec3b4e RS |
3950 | Lisp_Object overlay, prop; |
3951 | { | |
b7826503 | 3952 | CHECK_OVERLAY (overlay); |
9a593927 | 3953 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
3954 | } |
3955 | ||
3956 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
3957 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
3958 | (overlay, prop, value) | |
2eec3b4e RS |
3959 | Lisp_Object overlay, prop, value; |
3960 | { | |
48e2e3ba | 3961 | Lisp_Object tail, buffer; |
9d7608b7 | 3962 | int changed; |
2eec3b4e | 3963 | |
b7826503 | 3964 | CHECK_OVERLAY (overlay); |
b61982dd | 3965 | |
274a9425 RS |
3966 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3967 | ||
48e2e3ba | 3968 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
3969 | CONSP (tail) && CONSP (XCDR (tail)); |
3970 | tail = XCDR (XCDR (tail))) | |
3971 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 3972 | { |
7539e11f | 3973 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 3974 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 3975 | goto found; |
274a9425 | 3976 | } |
9d7608b7 KH |
3977 | /* It wasn't in the list, so add it to the front. */ |
3978 | changed = !NILP (value); | |
48e2e3ba KH |
3979 | XOVERLAY (overlay)->plist |
3980 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
3981 | found: |
3982 | if (! NILP (buffer)) | |
3983 | { | |
3984 | if (changed) | |
876aa27c | 3985 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
3986 | marker_position (OVERLAY_START (overlay)), |
3987 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
3988 | if (EQ (prop, Qevaporate) && ! NILP (value) |
3989 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
3990 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
3991 | Fdelete_overlay (overlay); | |
3992 | } | |
2eec3b4e | 3993 | return value; |
1ab256cb RM |
3994 | } |
3995 | \f | |
9115729e KH |
3996 | /* Subroutine of report_overlay_modification. */ |
3997 | ||
3998 | /* Lisp vector holding overlay hook functions to call. | |
3999 | Vector elements come in pairs. | |
4000 | Each even-index element is a list of hook functions. | |
4001 | The following odd-index element is the overlay they came from. | |
4002 | ||
4003 | Before the buffer change, we fill in this vector | |
4004 | as we call overlay hook functions. | |
4005 | After the buffer change, we get the functions to call from this vector. | |
4006 | This way we always call the same functions before and after the change. */ | |
4007 | static Lisp_Object last_overlay_modification_hooks; | |
4008 | ||
4009 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4010 | static int last_overlay_modification_hooks_used; | |
4011 | ||
4012 | /* Add one functionlist/overlay pair | |
4013 | to the end of last_overlay_modification_hooks. */ | |
4014 | ||
4015 | static void | |
4016 | add_overlay_mod_hooklist (functionlist, overlay) | |
4017 | Lisp_Object functionlist, overlay; | |
4018 | { | |
4019 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4020 | ||
4021 | if (last_overlay_modification_hooks_used == oldsize) | |
4022 | { | |
4023 | Lisp_Object old; | |
4024 | old = last_overlay_modification_hooks; | |
4025 | last_overlay_modification_hooks | |
4026 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4027 | bcopy (XVECTOR (old)->contents, |
4028 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4029 | sizeof (Lisp_Object) * oldsize); |
4030 | } | |
4031 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; | |
4032 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; | |
4033 | } | |
4034 | \f | |
173f2a64 RS |
4035 | /* Run the modification-hooks of overlays that include |
4036 | any part of the text in START to END. | |
9115729e KH |
4037 | If this change is an insertion, also |
4038 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4039 | and the insert-after-hooks of overlay ending at START. |
4040 | ||
4041 | This is called both before and after the modification. | |
4042 | AFTER is nonzero when we call after the modification. | |
4043 | ||
9115729e KH |
4044 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4045 | When AFTER is nonzero, they are the start position, | |
4046 | the position after the inserted new text, | |
4047 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4048 | |
4049 | void | |
930a9140 | 4050 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4051 | Lisp_Object start, end; |
930a9140 RS |
4052 | int after; |
4053 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 RS |
4054 | { |
4055 | Lisp_Object prop, overlay, tail; | |
9115729e KH |
4056 | /* 1 if this change is an insertion. */ |
4057 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
55b48893 | 4058 | int tail_copied; |
930a9140 | 4059 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
55b48893 RS |
4060 | |
4061 | overlay = Qnil; | |
4062 | tail = Qnil; | |
930a9140 | 4063 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
173f2a64 | 4064 | |
9115729e KH |
4065 | if (after) |
4066 | { | |
4067 | /* Call the functions recorded in last_overlay_modification_hooks | |
4068 | rather than scanning the overlays again. | |
4069 | First copy the vector contents, in case some of these hooks | |
4070 | do subsequent modification of the buffer. */ | |
4071 | int size = last_overlay_modification_hooks_used; | |
4072 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4073 | int i; | |
4074 | ||
4075 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4076 | copy, size * sizeof (Lisp_Object)); | |
4077 | gcpro1.var = copy; | |
4078 | gcpro1.nvars = size; | |
4079 | ||
4080 | for (i = 0; i < size;) | |
4081 | { | |
4082 | Lisp_Object prop, overlay; | |
4083 | prop = copy[i++]; | |
4084 | overlay = copy[i++]; | |
4085 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4086 | } | |
4087 | UNGCPRO; | |
4088 | return; | |
4089 | } | |
4090 | ||
4091 | /* We are being called before a change. | |
4092 | Scan the overlays to find the functions to call. */ | |
4093 | last_overlay_modification_hooks_used = 0; | |
55b48893 | 4094 | tail_copied = 0; |
173f2a64 RS |
4095 | for (tail = current_buffer->overlays_before; |
4096 | CONSP (tail); | |
7539e11f | 4097 | tail = XCDR (tail)) |
173f2a64 RS |
4098 | { |
4099 | int startpos, endpos; | |
be8b1c6b | 4100 | Lisp_Object ostart, oend; |
173f2a64 | 4101 | |
7539e11f | 4102 | overlay = XCAR (tail); |
173f2a64 RS |
4103 | |
4104 | ostart = OVERLAY_START (overlay); | |
4105 | oend = OVERLAY_END (overlay); | |
4106 | endpos = OVERLAY_POSITION (oend); | |
4107 | if (XFASTINT (start) > endpos) | |
4108 | break; | |
4109 | startpos = OVERLAY_POSITION (ostart); | |
9115729e KH |
4110 | if (insertion && (XFASTINT (start) == startpos |
4111 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
4112 | { |
4113 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
4114 | if (!NILP (prop)) |
4115 | { | |
4116 | /* Copy TAIL in case the hook recenters the overlay lists. */ | |
55b48893 RS |
4117 | if (!tail_copied) |
4118 | tail = Fcopy_sequence (tail); | |
4119 | tail_copied = 1; | |
930a9140 | 4120 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4121 | } |
173f2a64 | 4122 | } |
9115729e KH |
4123 | if (insertion && (XFASTINT (start) == endpos |
4124 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
4125 | { |
4126 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
4127 | if (!NILP (prop)) |
4128 | { | |
55b48893 RS |
4129 | if (!tail_copied) |
4130 | tail = Fcopy_sequence (tail); | |
4131 | tail_copied = 1; | |
930a9140 | 4132 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4133 | } |
173f2a64 | 4134 | } |
3bd13e92 KH |
4135 | /* Test for intersecting intervals. This does the right thing |
4136 | for both insertion and deletion. */ | |
4137 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
4138 | { |
4139 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
4140 | if (!NILP (prop)) |
4141 | { | |
55b48893 RS |
4142 | if (!tail_copied) |
4143 | tail = Fcopy_sequence (tail); | |
4144 | tail_copied = 1; | |
930a9140 | 4145 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4146 | } |
173f2a64 RS |
4147 | } |
4148 | } | |
4149 | ||
55b48893 | 4150 | tail_copied = 0; |
173f2a64 RS |
4151 | for (tail = current_buffer->overlays_after; |
4152 | CONSP (tail); | |
7539e11f | 4153 | tail = XCDR (tail)) |
173f2a64 RS |
4154 | { |
4155 | int startpos, endpos; | |
be8b1c6b | 4156 | Lisp_Object ostart, oend; |
173f2a64 | 4157 | |
7539e11f | 4158 | overlay = XCAR (tail); |
173f2a64 RS |
4159 | |
4160 | ostart = OVERLAY_START (overlay); | |
4161 | oend = OVERLAY_END (overlay); | |
4162 | startpos = OVERLAY_POSITION (ostart); | |
cdf0b096 | 4163 | endpos = OVERLAY_POSITION (oend); |
173f2a64 RS |
4164 | if (XFASTINT (end) < startpos) |
4165 | break; | |
9115729e KH |
4166 | if (insertion && (XFASTINT (start) == startpos |
4167 | || XFASTINT (end) == startpos)) | |
173f2a64 RS |
4168 | { |
4169 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); | |
5fb5aa33 RS |
4170 | if (!NILP (prop)) |
4171 | { | |
55b48893 RS |
4172 | if (!tail_copied) |
4173 | tail = Fcopy_sequence (tail); | |
4174 | tail_copied = 1; | |
930a9140 | 4175 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4176 | } |
173f2a64 | 4177 | } |
9115729e KH |
4178 | if (insertion && (XFASTINT (start) == endpos |
4179 | || XFASTINT (end) == endpos)) | |
173f2a64 RS |
4180 | { |
4181 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); | |
5fb5aa33 RS |
4182 | if (!NILP (prop)) |
4183 | { | |
55b48893 RS |
4184 | if (!tail_copied) |
4185 | tail = Fcopy_sequence (tail); | |
4186 | tail_copied = 1; | |
930a9140 | 4187 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4188 | } |
173f2a64 | 4189 | } |
3bd13e92 KH |
4190 | /* Test for intersecting intervals. This does the right thing |
4191 | for both insertion and deletion. */ | |
4192 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
173f2a64 RS |
4193 | { |
4194 | prop = Foverlay_get (overlay, Qmodification_hooks); | |
5fb5aa33 RS |
4195 | if (!NILP (prop)) |
4196 | { | |
55b48893 RS |
4197 | if (!tail_copied) |
4198 | tail = Fcopy_sequence (tail); | |
4199 | tail_copied = 1; | |
930a9140 | 4200 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
5fb5aa33 | 4201 | } |
173f2a64 RS |
4202 | } |
4203 | } | |
55b48893 RS |
4204 | |
4205 | UNGCPRO; | |
173f2a64 RS |
4206 | } |
4207 | ||
4208 | static void | |
930a9140 RS |
4209 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4210 | Lisp_Object list, overlay; | |
4211 | int after; | |
4212 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4213 | { |
930a9140 | 4214 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4215 | |
930a9140 | 4216 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e KH |
4217 | if (! after) |
4218 | add_overlay_mod_hooklist (list, overlay); | |
4219 | ||
6d70a280 | 4220 | while (CONSP (list)) |
173f2a64 | 4221 | { |
930a9140 | 4222 | if (NILP (arg3)) |
6d70a280 | 4223 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4224 | else |
6d70a280 SM |
4225 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4226 | list = XCDR (list); | |
173f2a64 RS |
4227 | } |
4228 | UNGCPRO; | |
4229 | } | |
9d7608b7 KH |
4230 | |
4231 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4232 | property is set. */ | |
4233 | void | |
4234 | evaporate_overlays (pos) | |
4235 | int pos; | |
4236 | { | |
4237 | Lisp_Object tail, overlay, hit_list; | |
4238 | ||
4239 | hit_list = Qnil; | |
4240 | if (pos <= XFASTINT (current_buffer->overlay_center)) | |
4241 | for (tail = current_buffer->overlays_before; CONSP (tail); | |
7539e11f | 4242 | tail = XCDR (tail)) |
9d7608b7 KH |
4243 | { |
4244 | int endpos; | |
7539e11f | 4245 | overlay = XCAR (tail); |
9d7608b7 KH |
4246 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4247 | if (endpos < pos) | |
4248 | break; | |
4249 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4250 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4251 | hit_list = Fcons (overlay, hit_list); |
4252 | } | |
4253 | else | |
4254 | for (tail = current_buffer->overlays_after; CONSP (tail); | |
7539e11f | 4255 | tail = XCDR (tail)) |
9d7608b7 KH |
4256 | { |
4257 | int startpos; | |
7539e11f | 4258 | overlay = XCAR (tail); |
9d7608b7 KH |
4259 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4260 | if (startpos > pos) | |
4261 | break; | |
4262 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4263 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4264 | hit_list = Fcons (overlay, hit_list); |
4265 | } | |
7539e11f KR |
4266 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4267 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4268 | } |
173f2a64 | 4269 | \f |
54dfdeb0 | 4270 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4271 | in the slot with offset OFFSET. */ |
4272 | ||
0fa3ba92 | 4273 | void |
54dfdeb0 KH |
4274 | buffer_slot_type_mismatch (offset) |
4275 | int offset; | |
0fa3ba92 | 4276 | { |
54dfdeb0 | 4277 | Lisp_Object sym; |
0fa3ba92 | 4278 | char *type_name; |
7c02e886 | 4279 | |
7313acd0 | 4280 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4281 | { |
7c02e886 GM |
4282 | case Lisp_Int: |
4283 | type_name = "integers"; | |
4284 | break; | |
4285 | ||
4286 | case Lisp_String: | |
4287 | type_name = "strings"; | |
4288 | break; | |
4289 | ||
4290 | case Lisp_Symbol: | |
4291 | type_name = "symbols"; | |
4292 | break; | |
4293 | ||
0fa3ba92 JB |
4294 | default: |
4295 | abort (); | |
4296 | } | |
4297 | ||
7313acd0 | 4298 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4299 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4300 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4301 | } |
7c02e886 | 4302 | |
0fa3ba92 | 4303 | \f |
b86af064 GM |
4304 | /*********************************************************************** |
4305 | Allocation with mmap | |
4306 | ***********************************************************************/ | |
4307 | ||
4308 | #ifdef USE_MMAP_FOR_BUFFERS | |
4309 | ||
4310 | #include <sys/types.h> | |
4311 | #include <sys/mman.h> | |
4312 | ||
4313 | #ifndef MAP_ANON | |
4314 | #ifdef MAP_ANONYMOUS | |
4315 | #define MAP_ANON MAP_ANONYMOUS | |
4316 | #else | |
4317 | #define MAP_ANON 0 | |
4318 | #endif | |
4319 | #endif | |
4320 | ||
09dfdf85 GM |
4321 | #ifndef MAP_FAILED |
4322 | #define MAP_FAILED ((void *) -1) | |
4323 | #endif | |
4324 | ||
b86af064 GM |
4325 | #include <stdio.h> |
4326 | #include <errno.h> | |
4327 | ||
4328 | #if MAP_ANON == 0 | |
4329 | #include <fcntl.h> | |
4330 | #endif | |
4331 | ||
4332 | #include "coding.h" | |
4333 | ||
4334 | ||
4335 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4336 | The current implementation lets the system select mapped | |
4337 | addresses; we're not using MAP_FIXED in general, except when | |
4338 | trying to enlarge regions. | |
4339 | ||
4340 | Each mapped region starts with a mmap_region structure, the user | |
4341 | area starts after that structure, aligned to MEM_ALIGN. | |
4342 | ||
4343 | +-----------------------+ | |
4344 | | struct mmap_info + | | |
4345 | | padding | | |
4346 | +-----------------------+ | |
4347 | | user data | | |
4348 | | | | |
4349 | | | | |
4350 | +-----------------------+ */ | |
4351 | ||
4352 | struct mmap_region | |
4353 | { | |
4354 | /* User-specified size. */ | |
4355 | size_t nbytes_specified; | |
4356 | ||
4357 | /* Number of bytes mapped */ | |
4358 | size_t nbytes_mapped; | |
4359 | ||
4360 | /* Pointer to the location holding the address of the memory | |
4361 | allocated with the mmap'd block. The variable actually points | |
4362 | after this structure. */ | |
4363 | POINTER_TYPE **var; | |
4364 | ||
4365 | /* Next and previous in list of all mmap'd regions. */ | |
4366 | struct mmap_region *next, *prev; | |
4367 | }; | |
4368 | ||
4369 | /* Doubly-linked list of mmap'd regions. */ | |
4370 | ||
4371 | static struct mmap_region *mmap_regions; | |
4372 | ||
4373 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4374 | /dev/zero will be opened on it. */ | |
4375 | ||
4376 | static int mmap_fd; | |
4377 | ||
4378 | /* Temporary storage for mmap_set_vars, see there. */ | |
4379 | ||
4380 | static struct mmap_region *mmap_regions_1; | |
4381 | static int mmap_fd_1; | |
4382 | ||
4383 | /* Page size on this system. */ | |
4384 | ||
4385 | static int mmap_page_size; | |
4386 | ||
4387 | /* 1 means mmap has been intialized. */ | |
4388 | ||
4389 | static int mmap_initialized_p; | |
4390 | ||
4391 | /* Value is X rounded up to the next multiple of N. */ | |
4392 | ||
4393 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4394 | ||
4395 | /* Size of mmap_region structure plus padding. */ | |
4396 | ||
4397 | #define MMAP_REGION_STRUCT_SIZE \ | |
4398 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4399 | ||
4400 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4401 | region, return a pointer to the start of the region. */ | |
4402 | ||
4403 | #define MMAP_REGION(P) \ | |
4404 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4405 | ||
4406 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4407 | to the start of the user-visible part of the region. */ | |
4408 | ||
4409 | #define MMAP_USER_AREA(P) \ | |
4410 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4411 | ||
4412 | #define MEM_ALIGN sizeof (double) | |
4413 | ||
7273faa1 DL |
4414 | /* Predicate returning true if part of the address range [START .. END] |
4415 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4416 | memory mapping. |
4417 | ||
4418 | Default is to conservativly assume the address range is occupied by | |
4419 | something else. This can be overridden by system configuration | |
4420 | files if system-specific means to determine this exists. */ | |
4421 | ||
4422 | #ifndef MMAP_ALLOCATED_P | |
4423 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4424 | #endif | |
4425 | ||
b86af064 GM |
4426 | /* Function prototypes. */ |
4427 | ||
4428 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4429 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4430 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4431 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4432 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4433 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4434 | static void mmap_init P_ ((void)); | |
4435 | ||
4436 | ||
4437 | /* Return a region overlapping address range START...END, or null if | |
4438 | none. END is not including, i.e. the last byte in the range | |
4439 | is at END - 1. */ | |
4440 | ||
4441 | static struct mmap_region * | |
4442 | mmap_find (start, end) | |
4443 | POINTER_TYPE *start, *end; | |
4444 | { | |
4445 | struct mmap_region *r; | |
4446 | char *s = (char *) start, *e = (char *) end; | |
4447 | ||
4448 | for (r = mmap_regions; r; r = r->next) | |
4449 | { | |
4450 | char *rstart = (char *) r; | |
4451 | char *rend = rstart + r->nbytes_mapped; | |
4452 | ||
4453 | if (/* First byte of range, i.e. START, in this region? */ | |
4454 | (s >= rstart && s < rend) | |
4455 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4456 | || (e > rstart && e <= rend) | |
4457 | /* First byte of this region in the range? */ | |
4458 | || (rstart >= s && rstart < e) | |
4459 | /* Last byte of this region in the range? */ | |
4460 | || (rend > s && rend <= e)) | |
4461 | break; | |
4462 | } | |
4463 | ||
4464 | return r; | |
4465 | } | |
4466 | ||
4467 | ||
4468 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4469 | the region. Value is non-zero if successful. */ | |
4470 | ||
4471 | static int | |
4472 | mmap_free_1 (r) | |
4473 | struct mmap_region *r; | |
4474 | { | |
4475 | if (r->next) | |
4476 | r->next->prev = r->prev; | |
4477 | if (r->prev) | |
4478 | r->prev->next = r->next; | |
4479 | else | |
4480 | mmap_regions = r->next; | |
4481 | ||
1a15cca0 | 4482 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4483 | { |
4484 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4485 | return 0; | |
4486 | } | |
4487 | ||
4488 | return 1; | |
4489 | } | |
4490 | ||
4491 | ||
4492 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4493 | Value is non-zero if successful. */ | |
4494 | ||
4495 | static int | |
4496 | mmap_enlarge (r, npages) | |
4497 | struct mmap_region *r; | |
4498 | int npages; | |
4499 | { | |
4500 | char *region_end = (char *) r + r->nbytes_mapped; | |
4501 | size_t nbytes; | |
4502 | int success = 0; | |
4503 | ||
4504 | if (npages < 0) | |
4505 | { | |
4506 | /* Unmap pages at the end of the region. */ | |
4507 | nbytes = - npages * mmap_page_size; | |
4508 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4509 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4510 | else | |
4511 | { | |
4512 | r->nbytes_mapped -= nbytes; | |
4513 | success = 1; | |
4514 | } | |
4515 | } | |
4516 | else if (npages > 0) | |
4517 | { | |
b86af064 GM |
4518 | nbytes = npages * mmap_page_size; |
4519 | ||
4520 | /* Try to map additional pages at the end of the region. We | |
4521 | cannot do this if the address range is already occupied by | |
4522 | something else because mmap deletes any previous mapping. | |
4523 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4524 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4525 | { |
4526 | POINTER_TYPE *p; | |
4527 | ||
4528 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, | |
4529 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4530 | if (p == MAP_FAILED) | |
edaa9aed | 4531 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4532 | else if (p != (POINTER_TYPE *) region_end) |
4533 | { | |
4534 | /* Kernels are free to choose a different address. In | |
4535 | that case, unmap what we've mapped above; we have | |
4536 | no use for it. */ | |
4537 | if (munmap (p, nbytes) == -1) | |
4538 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4539 | } | |
4540 | else | |
4541 | { | |
4542 | r->nbytes_mapped += nbytes; | |
4543 | success = 1; | |
4544 | } | |
4545 | } | |
4546 | } | |
4547 | ||
4548 | return success; | |
4549 | } | |
4550 | ||
4551 | ||
4552 | /* Set or reset variables holding references to mapped regions. If | |
4553 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4554 | non-zero, set all variables to the start of the user-areas | |
4555 | of mapped regions. | |
4556 | ||
4557 | This function is called from Fdump_emacs to ensure that the dumped | |
4558 | Emacs doesn't contain references to memory that won't be mapped | |
4559 | when Emacs starts. */ | |
4560 | ||
4561 | void | |
4562 | mmap_set_vars (restore_p) | |
4563 | int restore_p; | |
4564 | { | |
4565 | struct mmap_region *r; | |
4566 | ||
4567 | if (restore_p) | |
4568 | { | |
4569 | mmap_regions = mmap_regions_1; | |
4570 | mmap_fd = mmap_fd_1; | |
4571 | for (r = mmap_regions; r; r = r->next) | |
4572 | *r->var = MMAP_USER_AREA (r); | |
4573 | } | |
4574 | else | |
4575 | { | |
4576 | for (r = mmap_regions; r; r = r->next) | |
4577 | *r->var = NULL; | |
4578 | mmap_regions_1 = mmap_regions; | |
4579 | mmap_regions = NULL; | |
4580 | mmap_fd_1 = mmap_fd; | |
4581 | mmap_fd = -1; | |
4582 | } | |
4583 | } | |
4584 | ||
4585 | ||
4586 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4587 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4588 | address of some variable which will use the data area. | |
4589 | ||
4590 | The allocation of 0 bytes is valid. | |
4591 | ||
4592 | If we can't allocate the necessary memory, set *VAR to null, and | |
4593 | return null. */ | |
4594 | ||
4595 | static POINTER_TYPE * | |
4596 | mmap_alloc (var, nbytes) | |
4597 | POINTER_TYPE **var; | |
4598 | size_t nbytes; | |
4599 | { | |
4600 | void *p; | |
4601 | size_t map; | |
4602 | ||
4603 | mmap_init (); | |
4604 | ||
4605 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4606 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4607 | mmap_fd, 0); | |
4608 | ||
4609 | if (p == MAP_FAILED) | |
4610 | { | |
4611 | if (errno != ENOMEM) | |
4612 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4613 | p = NULL; | |
4614 | } | |
4615 | else | |
4616 | { | |
4617 | struct mmap_region *r = (struct mmap_region *) p; | |
4618 | ||
4619 | r->nbytes_specified = nbytes; | |
4620 | r->nbytes_mapped = map; | |
4621 | r->var = var; | |
4622 | r->prev = NULL; | |
4623 | r->next = mmap_regions; | |
4624 | if (r->next) | |
4625 | r->next->prev = r; | |
4626 | mmap_regions = r; | |
4627 | ||
4628 | p = MMAP_USER_AREA (p); | |
4629 | } | |
4630 | ||
4631 | return *var = p; | |
4632 | } | |
4633 | ||
4634 | ||
4635 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4636 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4637 | and return this value. If more memory cannot be allocated, then | |
4638 | leave *VAR unchanged, and return null. */ | |
4639 | ||
4640 | static POINTER_TYPE * | |
4641 | mmap_realloc (var, nbytes) | |
4642 | POINTER_TYPE **var; | |
4643 | size_t nbytes; | |
4644 | { | |
4645 | POINTER_TYPE *result; | |
4646 | ||
4647 | mmap_init (); | |
4648 | ||
4649 | if (*var == NULL) | |
4650 | result = mmap_alloc (var, nbytes); | |
4651 | else if (nbytes == 0) | |
4652 | { | |
4653 | mmap_free (var); | |
4654 | result = mmap_alloc (var, nbytes); | |
4655 | } | |
4656 | else | |
4657 | { | |
4658 | struct mmap_region *r = MMAP_REGION (*var); | |
4659 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
4660 | ||
4661 | if (room < nbytes) | |
4662 | { | |
4663 | /* Must enlarge. */ | |
4664 | POINTER_TYPE *old_ptr = *var; | |
4665 | ||
4666 | /* Try to map additional pages at the end of the region. | |
4667 | If that fails, allocate a new region, copy data | |
4668 | from the old region, then free it. */ | |
4669 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4670 | / mmap_page_size))) | |
4671 | { | |
4672 | r->nbytes_specified = nbytes; | |
4673 | *var = result = old_ptr; | |
4674 | } | |
4675 | else if (mmap_alloc (var, nbytes)) | |
4676 | { | |
4677 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4678 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4679 | result = *var; | |
4680 | r = MMAP_REGION (result); | |
4681 | r->nbytes_specified = nbytes; | |
4682 | } | |
4683 | else | |
4684 | { | |
4685 | *var = old_ptr; | |
4686 | result = NULL; | |
4687 | } | |
4688 | } | |
4689 | else if (room - nbytes >= mmap_page_size) | |
4690 | { | |
4691 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4692 | memory back to the system. |
4693 | ||
4694 | The extra parens are to make the division happens first, | |
4695 | on positive values, so we know it will round towards | |
4696 | zero. */ | |
bb63c5c9 | 4697 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4698 | result = *var; |
4699 | r->nbytes_specified = nbytes; | |
4700 | } | |
4701 | else | |
4702 | { | |
4703 | /* Leave it alone. */ | |
4704 | result = *var; | |
4705 | r->nbytes_specified = nbytes; | |
4706 | } | |
4707 | } | |
4708 | ||
4709 | return result; | |
4710 | } | |
4711 | ||
4712 | ||
4713 | /* Free a block of relocatable storage whose data is pointed to by | |
4714 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4715 | ||
4716 | static void | |
4717 | mmap_free (var) | |
4718 | POINTER_TYPE **var; | |
4719 | { | |
4720 | mmap_init (); | |
4721 | ||
4722 | if (*var) | |
4723 | { | |
4724 | mmap_free_1 (MMAP_REGION (*var)); | |
4725 | *var = NULL; | |
4726 | } | |
4727 | } | |
4728 | ||
4729 | ||
4730 | /* Perform necessary intializations for the use of mmap. */ | |
4731 | ||
4732 | static void | |
4733 | mmap_init () | |
4734 | { | |
4735 | #if MAP_ANON == 0 | |
4736 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4737 | in a dumped Emacs. */ | |
4738 | if (mmap_fd <= 0) | |
4739 | { | |
4740 | /* No anonymous mmap -- we need the file descriptor. */ | |
4741 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4742 | if (mmap_fd == -1) | |
4743 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4744 | } | |
4745 | #endif /* MAP_ANON == 0 */ | |
4746 | ||
4747 | if (mmap_initialized_p) | |
4748 | return; | |
4749 | mmap_initialized_p = 1; | |
4750 | ||
4751 | #if MAP_ANON != 0 | |
4752 | mmap_fd = -1; | |
4753 | #endif | |
4754 | ||
4755 | mmap_page_size = getpagesize (); | |
4756 | } | |
4757 | ||
4758 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4759 | ||
4760 | ||
4761 | \f | |
4762 | /*********************************************************************** | |
4763 | Buffer-text Allocation | |
4764 | ***********************************************************************/ | |
4765 | ||
4766 | #ifdef REL_ALLOC | |
4767 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4768 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4769 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4770 | #endif /* REL_ALLOC */ | |
4771 | ||
4772 | ||
4773 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4774 | ||
4775 | static void | |
4776 | alloc_buffer_text (b, nbytes) | |
4777 | struct buffer *b; | |
4778 | size_t nbytes; | |
4779 | { | |
4780 | POINTER_TYPE *p; | |
4781 | ||
4782 | BLOCK_INPUT; | |
4783 | #if defined USE_MMAP_FOR_BUFFERS | |
4784 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4785 | #elif defined REL_ALLOC | |
4786 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4787 | #else | |
815add84 | 4788 | p = xmalloc (nbytes); |
b86af064 GM |
4789 | #endif |
4790 | ||
4791 | if (p == NULL) | |
4792 | { | |
4793 | UNBLOCK_INPUT; | |
4794 | memory_full (); | |
4795 | } | |
4796 | ||
4797 | b->text->beg = (unsigned char *) p; | |
4798 | UNBLOCK_INPUT; | |
4799 | } | |
4800 | ||
4801 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4802 | shrink it. */ | |
4803 | ||
4804 | void | |
4805 | enlarge_buffer_text (b, delta) | |
4806 | struct buffer *b; | |
4807 | int delta; | |
4808 | { | |
4809 | POINTER_TYPE *p; | |
4810 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4811 | + delta); | |
4812 | BLOCK_INPUT; | |
4813 | #if defined USE_MMAP_FOR_BUFFERS | |
4814 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4815 | #elif defined REL_ALLOC | |
4816 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4817 | #else | |
4818 | p = xrealloc (b->text->beg, nbytes); | |
4819 | #endif | |
4820 | ||
4821 | if (p == NULL) | |
4822 | { | |
4823 | UNBLOCK_INPUT; | |
4824 | memory_full (); | |
4825 | } | |
4826 | ||
4827 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4828 | UNBLOCK_INPUT; | |
4829 | } | |
4830 | ||
4831 | ||
4832 | /* Free buffer B's text buffer. */ | |
4833 | ||
4834 | static void | |
4835 | free_buffer_text (b) | |
4836 | struct buffer *b; | |
4837 | { | |
4838 | BLOCK_INPUT; | |
4839 | ||
4840 | #if defined USE_MMAP_FOR_BUFFERS | |
4841 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4842 | #elif defined REL_ALLOC | |
4843 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4844 | #else | |
4845 | xfree (b->text->beg); | |
4846 | #endif | |
4847 | ||
4848 | BUF_BEG_ADDR (b) = NULL; | |
4849 | UNBLOCK_INPUT; | |
4850 | } | |
4851 | ||
4852 | ||
4853 | \f | |
4854 | /*********************************************************************** | |
4855 | Initialization | |
4856 | ***********************************************************************/ | |
4857 | ||
dfcf069d | 4858 | void |
1ab256cb RM |
4859 | init_buffer_once () |
4860 | { | |
7c02e886 GM |
4861 | int idx; |
4862 | ||
4863 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4864 | |
1ab256cb RM |
4865 | /* Make sure all markable slots in buffer_defaults |
4866 | are initialized reasonably, so mark_buffer won't choke. */ | |
4867 | reset_buffer (&buffer_defaults); | |
13de9290 | 4868 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4869 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4870 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4871 | /* Prevent GC from getting confused. */ |
4872 | buffer_defaults.text = &buffer_defaults.own_text; | |
4873 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4874 | BUF_INTERVALS (&buffer_defaults) = 0; |
4875 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4876 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4877 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4878 | |
4879 | /* Set up the default values of various buffer slots. */ | |
4880 | /* Must do these before making the first buffer! */ | |
4881 | ||
f532dca0 | 4882 | /* real setup is done in bindings.el */ |
1ab256cb | 4883 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4884 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4885 | buffer_defaults.abbrev_mode = Qnil; |
4886 | buffer_defaults.overwrite_mode = Qnil; | |
4887 | buffer_defaults.case_fold_search = Qt; | |
4888 | buffer_defaults.auto_fill_function = Qnil; | |
4889 | buffer_defaults.selective_display = Qnil; | |
4890 | #ifndef old | |
4891 | buffer_defaults.selective_display_ellipses = Qt; | |
4892 | #endif | |
4893 | buffer_defaults.abbrev_table = Qnil; | |
4894 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4895 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4896 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4897 | buffer_defaults.file_format = Qnil; |
2eec3b4e RS |
4898 | buffer_defaults.overlays_before = Qnil; |
4899 | buffer_defaults.overlays_after = Qnil; | |
bbbe9545 | 4900 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
1ab256cb | 4901 | |
8d7a4592 | 4902 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4903 | buffer_defaults.truncate_lines = Qnil; |
4904 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4905 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4906 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 4907 | buffer_defaults.extra_line_spacing = Qnil; |
1ab256cb | 4908 | |
f7975d07 | 4909 | #ifdef DOS_NT |
0776cb1b | 4910 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 4911 | #endif |
a1a17b61 | 4912 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 4913 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
4914 | XSETFASTINT (buffer_defaults.fill_column, 70); |
4915 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 4916 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 4917 | buffer_defaults.file_truename = Qnil; |
7962a441 | 4918 | XSETFASTINT (buffer_defaults.display_count, 0); |
0552666b GM |
4919 | buffer_defaults.indicate_empty_lines = Qnil; |
4920 | buffer_defaults.scroll_up_aggressively = Qnil; | |
4921 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 4922 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
4923 | |
4924 | /* Assign the local-flags to the slots that have default values. | |
4925 | The local flag is a bit that is used in the buffer | |
4926 | to say that it has its own local value for the slot. | |
4927 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4928 | ||
4929 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 4930 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
4931 | |
4932 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
4933 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
4934 | XSETINT (buffer_local_flags.filename, -1); |
4935 | XSETINT (buffer_local_flags.directory, -1); | |
4936 | XSETINT (buffer_local_flags.backed_up, -1); | |
4937 | XSETINT (buffer_local_flags.save_length, -1); | |
4938 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
4939 | XSETINT (buffer_local_flags.read_only, -1); | |
4940 | XSETINT (buffer_local_flags.major_mode, -1); | |
4941 | XSETINT (buffer_local_flags.mode_name, -1); | |
4942 | XSETINT (buffer_local_flags.undo_list, -1); | |
4943 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 4944 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 4945 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 4946 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 4947 | XSETINT (buffer_local_flags.file_format, -1); |
7962a441 | 4948 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 4949 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 4950 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 4951 | |
7c02e886 GM |
4952 | idx = 1; |
4953 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
4954 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
4955 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
4956 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
4957 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
4958 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 4959 | #ifndef old |
7c02e886 | 4960 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 4961 | #endif |
7c02e886 GM |
4962 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
4963 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
4964 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
4965 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
4966 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
4967 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
4968 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 4969 | #ifdef DOS_NT |
7c02e886 | 4970 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 4971 | /* Make this one a permanent local. */ |
7c02e886 | 4972 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 4973 | #endif |
7c02e886 GM |
4974 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
4975 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
4976 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
4977 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
4978 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); | |
a1a17b61 | 4979 | /* Make this one a permanent local. */ |
7c02e886 GM |
4980 | buffer_permanent_local_flags[idx++] = 1; |
4981 | XSETFASTINT (buffer_local_flags.left_margin_width, idx); ++idx; | |
4982 | XSETFASTINT (buffer_local_flags.right_margin_width, idx); ++idx; | |
4983 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; | |
4984 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; | |
4985 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
4986 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 4987 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 4988 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
7c02e886 GM |
4989 | |
4990 | /* Need more room? */ | |
7313acd0 | 4991 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 4992 | abort (); |
7313acd0 | 4993 | last_per_buffer_idx = idx; |
c71b5d9b | 4994 | |
1ab256cb RM |
4995 | Vbuffer_alist = Qnil; |
4996 | current_buffer = 0; | |
4997 | all_buffers = 0; | |
4998 | ||
4999 | QSFundamental = build_string ("Fundamental"); | |
5000 | ||
5001 | Qfundamental_mode = intern ("fundamental-mode"); | |
5002 | buffer_defaults.major_mode = Qfundamental_mode; | |
5003 | ||
5004 | Qmode_class = intern ("mode-class"); | |
5005 | ||
5006 | Qprotected_field = intern ("protected-field"); | |
5007 | ||
5008 | Qpermanent_local = intern ("permanent-local"); | |
5009 | ||
5010 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
5011 | ||
48265e61 DL |
5012 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5013 | ||
1ab256cb | 5014 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5015 | |
1ab256cb RM |
5016 | /* super-magic invisible buffer */ |
5017 | Vbuffer_alist = Qnil; | |
5018 | ||
ffd56f97 | 5019 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5020 | |
5021 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5022 | } |
5023 | ||
dfcf069d | 5024 | void |
1ab256cb RM |
5025 | init_buffer () |
5026 | { | |
93c27ef1 | 5027 | char buf[MAXPATHLEN + 1]; |
2381d133 JB |
5028 | char *pwd; |
5029 | struct stat dotstat, pwdstat; | |
136351b7 | 5030 | Lisp_Object temp; |
f7975d07 | 5031 | int rc; |
1ab256cb | 5032 | |
b86af064 | 5033 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5034 | { |
5035 | /* When using the ralloc implementation based on mmap(2), buffer | |
5036 | text pointers will have been set to null in the dumped Emacs. | |
5037 | Map new memory. */ | |
5038 | struct buffer *b; | |
5039 | ||
93c27ef1 GM |
5040 | for (b = all_buffers; b; b = b->next) |
5041 | if (b->text->beg == NULL) | |
b86af064 | 5042 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5043 | } |
b86af064 | 5044 | #endif /* USE_MMAP_FOR_BUFFERS */ |
93c27ef1 | 5045 | |
1ab256cb | 5046 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5047 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5048 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5049 | |
314dbe9a PE |
5050 | /* If PWD is accurate, use it instead of calling getwd. PWD is |
5051 | sometimes a nicer name, and using it may avoid a fatal error if a | |
5052 | parent directory is searchable but not readable. */ | |
309f2a6e RS |
5053 | if ((pwd = getenv ("PWD")) != 0 |
5054 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
2381d133 JB |
5055 | && stat (pwd, &pwdstat) == 0 |
5056 | && stat (".", &dotstat) == 0 | |
5057 | && dotstat.st_ino == pwdstat.st_ino | |
5058 | && dotstat.st_dev == pwdstat.st_dev | |
5059 | && strlen (pwd) < MAXPATHLEN) | |
5060 | strcpy (buf, pwd); | |
6335beb0 RS |
5061 | #ifdef HAVE_GETCWD |
5062 | else if (getcwd (buf, MAXPATHLEN+1) == 0) | |
9dde47f5 | 5063 | fatal ("`getcwd' failed: %s\n", strerror (errno)); |
6335beb0 | 5064 | #else |
2381d133 | 5065 | else if (getwd (buf) == 0) |
cf1e6391 | 5066 | fatal ("`getwd' failed: %s\n", buf); |
6335beb0 | 5067 | #endif |
1ab256cb RM |
5068 | |
5069 | #ifndef VMS | |
5070 | /* Maybe this should really use some standard subroutine | |
5071 | whose definition is filename syntax dependent. */ | |
f7975d07 RS |
5072 | rc = strlen (buf); |
5073 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) | |
5074 | { | |
5075 | buf[rc] = DIRECTORY_SEP; | |
5076 | buf[rc + 1] = '\0'; | |
5077 | } | |
1ab256cb | 5078 | #endif /* not VMS */ |
0995fa35 | 5079 | |
1ab256cb | 5080 | current_buffer->directory = build_string (buf); |
136351b7 | 5081 | |
0995fa35 RS |
5082 | /* Add /: to the front of the name |
5083 | if it would otherwise be treated as magic. */ | |
5084 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5085 | if (! NILP (temp) |
5086 | /* If the default dir is just /, TEMP is non-nil | |
5087 | because of the ange-ftp completion handler. | |
5088 | However, it is not necessary to turn / into /:/. | |
5089 | So avoid doing that. */ | |
d5db4077 | 5090 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5091 | current_buffer->directory |
5092 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5093 | ||
136351b7 RS |
5094 | temp = get_minibuffer (0); |
5095 | XBUFFER (temp)->directory = current_buffer->directory; | |
1ab256cb RM |
5096 | } |
5097 | ||
5098 | /* initialize the buffer routines */ | |
dfcf069d | 5099 | void |
1ab256cb RM |
5100 | syms_of_buffer () |
5101 | { | |
9115729e KH |
5102 | staticpro (&last_overlay_modification_hooks); |
5103 | last_overlay_modification_hooks | |
5104 | = Fmake_vector (make_number (10), Qnil); | |
5105 | ||
1ab256cb RM |
5106 | staticpro (&Vbuffer_defaults); |
5107 | staticpro (&Vbuffer_local_symbols); | |
5108 | staticpro (&Qfundamental_mode); | |
5109 | staticpro (&Qmode_class); | |
5110 | staticpro (&QSFundamental); | |
5111 | staticpro (&Vbuffer_alist); | |
5112 | staticpro (&Qprotected_field); | |
5113 | staticpro (&Qpermanent_local); | |
5114 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5115 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5116 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5117 | Qevaporate = intern ("evaporate"); |
5118 | staticpro (&Qevaporate); | |
294d215f | 5119 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5120 | staticpro (&Qmodification_hooks); |
294d215f | 5121 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5122 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5123 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5124 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5125 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5126 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5127 | Qpriority = intern ("priority"); |
5128 | staticpro (&Qpriority); | |
5129 | Qwindow = intern ("window"); | |
5130 | staticpro (&Qwindow); | |
bbbe9545 KH |
5131 | Qbefore_string = intern ("before-string"); |
5132 | staticpro (&Qbefore_string); | |
5133 | Qafter_string = intern ("after-string"); | |
5134 | staticpro (&Qafter_string); | |
22378665 RS |
5135 | Qfirst_change_hook = intern ("first-change-hook"); |
5136 | staticpro (&Qfirst_change_hook); | |
5137 | Qbefore_change_functions = intern ("before-change-functions"); | |
5138 | staticpro (&Qbefore_change_functions); | |
5139 | Qafter_change_functions = intern ("after-change-functions"); | |
5140 | staticpro (&Qafter_change_functions); | |
48265e61 | 5141 | staticpro (&Qucs_set_table_for_input); |
1ab256cb RM |
5142 | |
5143 | Fput (Qprotected_field, Qerror_conditions, | |
5144 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5145 | Fput (Qprotected_field, Qerror_message, | |
5146 | build_string ("Attempt to modify a protected field")); | |
5147 | ||
5148 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5149 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5150 | ||
5151 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5152 | &buffer_defaults.mode_line_format, |
5153 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5154 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5155 | |
045dee35 | 5156 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5157 | &buffer_defaults.header_line_format, |
5158 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5159 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5160 | |
7ee72033 MB |
5161 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5162 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5163 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5164 | |
a3bbced0 | 5165 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5166 | &buffer_defaults.extra_line_spacing, |
5167 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5168 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5169 | |
1ab256cb | 5170 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5171 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5172 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5173 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5174 | |
5175 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5176 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5177 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5178 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5179 | |
3b06f880 | 5180 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
efc7e75f | 5181 | &buffer_defaults.direction_reversed, |
7ee72033 | 5182 | doc: /* Default value of `direction_reversed' for buffers that do not override it. |
018ba359 | 5183 | This is the same as (default-value 'direction-reversed). */); |
3b06f880 | 5184 | |
a1a17b61 | 5185 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
efc7e75f | 5186 | &buffer_defaults.enable_multibyte_characters, |
7ee72033 | 5187 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5188 | This is the same as (default-value 'enable-multibyte-characters). */); |
a1a17b61 | 5189 | |
c71b5d9b | 5190 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
efc7e75f | 5191 | &buffer_defaults.buffer_file_coding_system, |
7ee72033 | 5192 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. |
018ba359 | 5193 | This is the same as (default-value 'buffer-file-coding-system). */); |
c71b5d9b | 5194 | |
1ab256cb | 5195 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5196 | &buffer_defaults.truncate_lines, |
5197 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5198 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5199 | |
5200 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5201 | &buffer_defaults.fill_column, |
5202 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5203 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5204 | |
5205 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5206 | &buffer_defaults.left_margin, |
5207 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5208 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5209 | |
5210 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5211 | &buffer_defaults.tab_width, |
5212 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5213 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5214 | |
5215 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5216 | &buffer_defaults.case_fold_search, |
5217 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5218 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5219 | |
f7975d07 | 5220 | #ifdef DOS_NT |
54ad07d3 | 5221 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5222 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5223 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5224 | This is the same as (default-value 'buffer-file-type). |
5225 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5226 | #endif |
5227 | ||
0552666b | 5228 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
efc7e75f PJ |
5229 | &buffer_defaults.left_margin_width, |
5230 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5231 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5232 | |
5233 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
efc7e75f PJ |
5234 | &buffer_defaults.right_margin_width, |
5235 | doc: /* Default value of `right_margin_width' for buffers that don't override it. | |
018ba359 | 5236 | This is the same as (default-value 'right-margin-width). */); |
0552666b GM |
5237 | |
5238 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", | |
efc7e75f PJ |
5239 | &buffer_defaults.indicate_empty_lines, |
5240 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5241 | This is the same as (default-value 'indicate-empty-lines). */); |
0552666b GM |
5242 | |
5243 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", | |
efc7e75f | 5244 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5245 | doc: /* Default value of `scroll-up-aggressively'. |
5246 | This value applies in buffers that don't have their own local values. | |
5247 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
0552666b GM |
5248 | |
5249 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", | |
efc7e75f | 5250 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5251 | doc: /* Default value of `scroll-down-aggressively'. |
5252 | This value applies in buffers that don't have their own local values. | |
5253 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
0552666b | 5254 | |
045dee35 | 5255 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5256 | ¤t_buffer->header_line_format, |
7ee72033 | 5257 | Qnil, |
7614d762 RS |
5258 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5259 | The header line appears, optionally, at the top of a window; | |
5260 | the mode line appears at the bottom. */); | |
0552666b | 5261 | |
1ab256cb | 5262 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5263 | Qnil, |
5264 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5265 | Each buffer has its own value of this variable. |
5266 | Value may be nil, a string, a symbol or a list or cons cell. | |
5267 | A value of nil means don't display a mode line. | |
5268 | For a symbol, its value is used (but it is ignored if t or nil). | |
5269 | A string appearing directly as the value of a symbol is processed verbatim | |
5270 | in that the %-constructs below are not recognized. | |
ed463255 KS |
5271 | Note that unless the symbol is marked as a `risky-local-variable', all |
5272 | properties in any strings, as well as all :eval and :propertize forms | |
5273 | in the value of that symbol will be ignored. | |
018ba359 | 5274 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5275 | is used as a mode line element. Be careful--FORM should not load any files, |
5276 | because that can cause an infinite recursion. | |
ed463255 KS |
5277 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5278 | with the specified properties PROPS applied. | |
018ba359 PJ |
5279 | For a list whose car is a symbol, the symbol's value is taken, |
5280 | and if that is non-nil, the cadr of the list is processed recursively. | |
5281 | Otherwise, the caddr of the list (if there is one) is processed. | |
5282 | For a list whose car is a string or list, each element is processed | |
5283 | recursively and the results are effectively concatenated. | |
5284 | For a list whose car is an integer, the cdr of the list is processed | |
5285 | and padded (if the number is positive) or truncated (if negative) | |
5286 | to the width specified by that number. | |
5287 | A string is printed verbatim in the mode line except for %-constructs: | |
5288 | (%-constructs are allowed when the string is the entire mode-line-format | |
5289 | or when it is found in a cons-cell or a list) | |
5290 | %b -- print buffer name. %f -- print visited file name. | |
5291 | %F -- print frame name. | |
5292 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5293 | %& is like %*, but ignore read-only-ness. | |
5294 | % means buffer is read-only and * means it is modified. | |
5295 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5296 | %s -- print process status. %l -- print the current line number. | |
5297 | %c -- print the current column number (this makes editing slower). | |
5298 | To make the column number update correctly in all cases, | |
5299 | `column-number-mode' must be non-nil. | |
5300 | %p -- print percent of buffer above top of window, or Top, Bot or All. | |
5301 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5302 | or print Bottom or All. | |
5303 | %m -- print the mode name. | |
5304 | %n -- print Narrow if appropriate. | |
5305 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems. | |
5306 | %Z -- like %z, but including the end-of-line format. | |
5307 | %[ -- print one [ for each recursive editing level. %] similar. | |
5308 | %% -- print %. %- -- print infinitely many dashes. | |
5309 | Decimal digits after the % specify field width to which to pad. */); | |
5310 | ||
7ee72033 | 5311 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5312 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
018ba359 | 5313 | nil here means use current buffer's major mode. */); |
1ab256cb RM |
5314 | |
5315 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5316 | make_number (Lisp_Symbol), |
efc7e75f | 5317 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5318 | |
5319 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5320 | Qnil, |
efc7e75f | 5321 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5322 | |
7ee72033 | 5323 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5324 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5325 | |
5326 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5327 | Qnil, |
efc7e75f | 5328 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5329 | |
5330 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5331 | make_number (Lisp_Int), |
1ac5826d RS |
5332 | doc: /* *Column beyond which automatic line-wrapping should happen. |
5333 | Interactively, you can set this using \\[set-fill-column]. */); | |
1ab256cb RM |
5334 | |
5335 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5336 | make_number (Lisp_Int), |
efc7e75f | 5337 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5338 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5339 | |
5340 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5341 | make_number (Lisp_Int), |
efc7e75f | 5342 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5343 | |
7ee72033 | 5344 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5345 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5346 | A value of nil means use backslash and octal digits. |
5347 | This variable does not apply to characters whose display is specified | |
5348 | in the current display table (if there is one). */); | |
1ab256cb | 5349 | |
3b06f880 | 5350 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5351 | ¤t_buffer->enable_multibyte_characters, |
7ee72033 | 5352 | make_number (-1), |
efc7e75f | 5353 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5354 | Otherwise they are regarded as unibyte. This affects the display, |
5355 | file I/O and the behavior of various editing commands. | |
5356 | ||
5357 | This variable is buffer-local but you cannot set it directly; | |
5358 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5359 | Changing its default value with `setq-default' is supported. | |
5360 | See also variable `default-enable-multibyte-characters' and Info node | |
5361 | `(elisp)Text Representations'. */); | |
3b06f880 | 5362 | |
c71b5d9b | 5363 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5364 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5365 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5366 | This variable applies to saving the buffer, and also to `write-region' |
5367 | and other functions that use `write-region'. | |
5368 | It does not apply to sending output to subprocesses, however. | |
5369 | ||
5370 | If this is nil, the buffer is saved without any code conversion | |
5371 | unless some coding system is specified in `file-coding-system-alist' | |
5372 | for the buffer file. | |
5373 | ||
31a6cb06 EZ |
5374 | If the text to be saved cannot be encoded as specified by this variable, |
5375 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5376 | ||
018ba359 PJ |
5377 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5378 | ||
5379 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5380 | |
3b06f880 | 5381 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5382 | Qnil, |
efc7e75f | 5383 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5384 | |
7ee72033 | 5385 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5386 | doc: /* *Non-nil means do not display continuation lines. |
5387 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5388 | |
5389 | Note that this is overridden by the variable | |
5390 | `truncate-partial-width-windows' if that variable is non-nil | |
5391 | and this buffer is not full-frame width. */); | |
1ab256cb | 5392 | |
f7975d07 | 5393 | #ifdef DOS_NT |
54ad07d3 | 5394 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5395 | Qnil, |
efc7e75f | 5396 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5397 | This variable is meaningful on MS-DOG and Windows NT. |
5398 | On those systems, it is automatically local in every buffer. | |
5399 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5400 | #endif |
5401 | ||
1ab256cb | 5402 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5403 | make_number (Lisp_String), |
efc7e75f | 5404 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5405 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5406 | |
5407 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5408 | Qnil, |
efc7e75f | 5409 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5410 | It is called after self-inserting any character specified in |
5411 | the `auto-fill-chars' table. | |
5412 | NOTE: This variable is not a hook; | |
5413 | its value may not be a list of functions. */); | |
1ab256cb RM |
5414 | |
5415 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5416 | make_number (Lisp_String), |
efc7e75f | 5417 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5418 | |
f6ed2e84 | 5419 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5420 | make_number (Lisp_String), |
efc7e75f | 5421 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5422 | The truename of a file is calculated by `file-truename' |
5423 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5424 | |
1ab256cb | 5425 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5426 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5427 | make_number (Lisp_String), |
7614d762 RS |
5428 | doc: /* Name of file for auto-saving current buffer. |
5429 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5430 | |
7ee72033 | 5431 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5432 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5433 | |
7ee72033 | 5434 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5435 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5436 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5437 | |
5438 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5439 | make_number (Lisp_Int), |
efc7e75f | 5440 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5441 | 0 initially. */); |
1ab256cb RM |
5442 | |
5443 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5444 | Qnil, |
7614d762 RS |
5445 | doc: /* Non-nil enables selective display. |
5446 | An Integer N as value means display only lines | |
5447 | that start with less than n columns of space. | |
5448 | A value of t means that the character ^M makes itself and | |
5449 | all the rest of the line invisible; also, when saving the buffer | |
5450 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5451 | |
5452 | #ifndef old | |
5453 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5454 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5455 | Qnil, |
3f676284 | 5456 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5457 | #endif |
5458 | ||
7ee72033 | 5459 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5460 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5461 | The value should be one of `overwrite-mode-textual', |
5462 | `overwrite-mode-binary', or nil. | |
5463 | If it is `overwrite-mode-textual', self-insertion still | |
5464 | inserts at the end of a line, and inserts when point is before a tab, | |
5465 | until the tab is filled in. | |
5466 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5467 | ||
54939090 | 5468 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5469 | Qnil, |
efc7e75f | 5470 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5471 | |
5472 | If this variable is nil, the value of `standard-display-table' is used. | |
5473 | Each window can have its own, overriding display table, see | |
5474 | `set-window-display-table' and `window-display-table'. | |
5475 | ||
5476 | The display table is a char-table created with `make-display-table'. | |
5477 | A char-table is an array indexed by character codes. Normal array | |
5478 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5479 | ||
5480 | Each of the char-table elements control how to display the corresponding | |
5481 | text character: the element at index C in the table says how to display | |
5482 | the character whose code is C. Each element should be a vector of | |
5483 | characters or nil. nil means display the character in the default fashion; | |
5484 | otherwise, the characters from the vector are delivered to the screen | |
5485 | instead of the original character. | |
5486 | ||
5487 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5488 | a capital Y instead of each X character. | |
5489 | ||
5490 | In addition, a char-table has six extra slots to control the display of: | |
5491 | ||
5492 | the end of a truncated screen line (extra-slot 0, a single character); | |
5493 | the end of a continued line (extra-slot 1, a single character); | |
5494 | the escape character used to display character codes in octal | |
5495 | (extra-slot 2, a single character); | |
5496 | the character used as an arrow for control characters (extra-slot 3, | |
5497 | a single character); | |
5498 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5499 | a vector of characters); | |
5500 | the character used to draw the border between side-by-side windows | |
5501 | (extra-slot 5, a single character). | |
5502 | ||
5503 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5504 | |
0552666b | 5505 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_width, |
7ee72033 | 5506 | Qnil, |
efc7e75f | 5507 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5508 | A value of nil means no marginal area. */); |
0552666b GM |
5509 | |
5510 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_width, | |
7ee72033 | 5511 | Qnil, |
efc7e75f | 5512 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5513 | A value of nil means no marginal area. */); |
0552666b GM |
5514 | |
5515 | DEFVAR_PER_BUFFER ("indicate-empty-lines", | |
7ee72033 | 5516 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5517 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5518 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5519 | window-systems. */); | |
0552666b GM |
5520 | |
5521 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", | |
7ee72033 | 5522 | ¤t_buffer->scroll_up_aggressively, Qnil, |
efc7e75f | 5523 | doc: /* *If a number, scroll display up aggressively. |
6524d955 | 5524 | If scrolling a window because point is below the window end, choose |
018ba359 | 5525 | a new window start so that point ends up that fraction of the window's |
6524d955 | 5526 | height from the bottom of the window. */); |
0552666b GM |
5527 | |
5528 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", | |
7ee72033 | 5529 | ¤t_buffer->scroll_down_aggressively, Qnil, |
efc7e75f | 5530 | doc: /* *If a number, scroll display down aggressively. |
6524d955 | 5531 | If scrolling a window because point is above the window start, choose |
018ba359 | 5532 | a new window start so that point ends up that fraction of the window's |
6524d955 | 5533 | height from the top of the window. */); |
0552666b | 5534 | |
1ab256cb RM |
5535 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5536 | "Don't ask."); | |
5537 | */ | |
1ab256cb | 5538 | |
7ee72033 MB |
5539 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5540 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5541 | Two arguments are passed to each function: the positions of |
5542 | the beginning and end of the range of old text to be changed. | |
5543 | \(For an insertion, the beginning and end are at the same place.) | |
5544 | No information is given about the length of the text after the change. | |
5545 | ||
5546 | Buffer changes made while executing the `before-change-functions' | |
5547 | don't call any before-change or after-change functions. | |
5548 | That's because these variables are temporarily set to nil. | |
5549 | As a result, a hook function cannot straightforwardly alter the value of | |
5550 | these variables. See the Emacs Lisp manual for a way of | |
5551 | accomplishing an equivalent result by using other variables. | |
5552 | ||
5553 | If an unhandled error happens in running these functions, | |
5554 | the variable's value remains nil. That prevents the error | |
5555 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5556 | Vbefore_change_functions = Qnil; |
5557 | ||
7ee72033 | 5558 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5559 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5560 | Three arguments are passed to each function: the positions of |
5561 | the beginning and end of the range of changed text, | |
5562 | and the length in bytes of the pre-change text replaced by that range. | |
5563 | \(For an insertion, the pre-change length is zero; | |
5564 | for a deletion, that length is the number of bytes deleted, | |
5565 | and the post-change beginning and end are at the same place.) | |
5566 | ||
5567 | Buffer changes made while executing the `after-change-functions' | |
5568 | don't call any before-change or after-change functions. | |
5569 | That's because these variables are temporarily set to nil. | |
5570 | As a result, a hook function cannot straightforwardly alter the value of | |
5571 | these variables. See the Emacs Lisp manual for a way of | |
5572 | accomplishing an equivalent result by using other variables. | |
5573 | ||
5574 | If an unhandled error happens in running these functions, | |
5575 | the variable's value remains nil. That prevents the error | |
5576 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5577 | Vafter_change_functions = Qnil; |
5578 | ||
7ee72033 | 5579 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5580 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5581 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5582 | Vfirst_change_hook = Qnil; |
1ab256cb | 5583 | |
7ee72033 MB |
5584 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5585 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5586 | Recent changes come first; older changes follow newer. |
5587 | ||
5588 | An entry (BEG . END) represents an insertion which begins at | |
5589 | position BEG and ends at position END. | |
5590 | ||
5591 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5592 | from (abs POSITION). If POSITION is positive, point was at the front | |
5593 | of the text being deleted; if negative, point was at the end. | |
5594 | ||
5595 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5596 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5597 | of the visited file's modification time, as of that time. If the | |
5598 | modification time of the most recent save is different, this entry is | |
5599 | obsolete. | |
5600 | ||
5601 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5602 | was modified between BEG and END. PROPERTY is the property name, | |
5603 | and VALUE is the old value. | |
5604 | ||
5605 | An entry (MARKER . DISTANCE) indicates that the marker MARKER | |
5606 | was adjusted in position by the offset DISTANCE (an integer). | |
5607 | ||
5608 | An entry of the form POSITION indicates that point was at the buffer | |
5609 | location given by the integer. Undoing an entry of this form places | |
5610 | point at POSITION. | |
5611 | ||
5612 | nil marks undo boundaries. The undo command treats the changes | |
5613 | between two undo boundaries as a single step to be undone. | |
5614 | ||
5615 | If the value of the variable is t, undo information is not recorded. */); | |
5616 | ||
7ee72033 MB |
5617 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5618 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5619 | |
7ee72033 MB |
5620 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5621 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5622 | |
5623 | Normally, the line-motion functions work by scanning the buffer for | |
5624 | newlines. Columnar operations (like move-to-column and | |
5625 | compute-motion) also work by scanning the buffer, summing character | |
5626 | widths as they go. This works well for ordinary text, but if the | |
5627 | buffer's lines are very long (say, more than 500 characters), these | |
5628 | motion functions will take longer to execute. Emacs may also take | |
5629 | longer to update the display. | |
5630 | ||
5631 | If cache-long-line-scans is non-nil, these motion functions cache the | |
5632 | results of their scans, and consult the cache to avoid rescanning | |
5633 | regions of the buffer until the text is modified. The caches are most | |
5634 | beneficial when they prevent the most searching---that is, when the | |
5635 | buffer contains long lines and large regions of characters with the | |
5636 | same, fixed screen width. | |
5637 | ||
5638 | When cache-long-line-scans is non-nil, processing short lines will | |
5639 | become slightly slower (because of the overhead of consulting the | |
5640 | cache), and the caches will use memory roughly proportional to the | |
5641 | number of newlines and characters whose screen width varies. | |
5642 | ||
5643 | The caches require no explicit maintenance; their accuracy is | |
5644 | maintained internally by the Emacs primitives. Enabling or disabling | |
5645 | the cache should not affect the behavior of any of the motion | |
5646 | functions; it should only affect their performance. */); | |
5647 | ||
7ee72033 MB |
5648 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5649 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5650 | |
7ee72033 MB |
5651 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5652 | doc: /* List of formats to use when saving this buffer. | |
018ba359 PJ |
5653 | Formats are defined by `format-alist'. This variable is |
5654 | set when a file is visited. Automatically local in all buffers. */); | |
be9aafdd | 5655 | |
3cb719bd | 5656 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5657 | ¤t_buffer->invisibility_spec, Qnil, |
5658 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5659 | The default is t, which means that text is invisible |
5660 | if it has a non-nil `invisible' property. | |
5661 | If the value is a list, a text character is invisible if its `invisible' | |
5662 | property is an element in that list. | |
5663 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5664 | then characters with property value PROP are invisible, | |
5665 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5666 | |
7962a441 | 5667 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5668 | ¤t_buffer->display_count, Qnil, |
5669 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5670 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5671 | |
5672 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5673 | ¤t_buffer->display_time, Qnil, |
5674 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5675 | The function `set-window-buffer' updates this variable |
5676 | to the value obtained by calling `current-time'. | |
5677 | If the buffer has never been shown in a window, the value is nil. */); | |
5678 | ||
7ee72033 MB |
5679 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5680 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5681 | Non-nil also enables highlighting of the region whenever the mark is active. |
5682 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5683 | all windows or just the selected window. */); | |
c48f61ef RS |
5684 | Vtransient_mark_mode = Qnil; |
5685 | ||
7ee72033 MB |
5686 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
5687 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
5688 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5689 | text properties. If the value is a list, disregard `buffer-read-only' | |
5690 | and disregard a `read-only' text property if the property value | |
5691 | is a member of the list. */); | |
a96b68f1 RS |
5692 | Vinhibit_read_only = Qnil; |
5693 | ||
7ee72033 | 5694 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 5695 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5696 | Values are interpreted as follows: |
5697 | ||
cd8d5236 RS |
5698 | t use the cursor specified for the frame |
5699 | nil don't display a cursor | |
5700 | bar display a bar cursor with default width | |
5701 | (bar . WIDTH) display a bar cursor with width WIDTH | |
5702 | ANYTHING ELSE display a box cursor. | |
5703 | ||
5704 | When the buffer is displayed in a nonselected window, | |
5705 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 5706 | |
a3bbced0 | 5707 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
5708 | ¤t_buffer->extra_line_spacing, Qnil, |
5709 | doc: /* Additional space to put between lines when displaying a buffer. | |
018ba359 | 5710 | The space is measured in pixels, and put below lines on window systems. */); |
a3bbced0 | 5711 | |
7ee72033 | 5712 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 5713 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
5714 | Vkill_buffer_query_functions = Qnil; |
5715 | ||
0dc88e60 | 5716 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
5717 | defsubr (&Sbuffer_list); |
5718 | defsubr (&Sget_buffer); | |
5719 | defsubr (&Sget_file_buffer); | |
5720 | defsubr (&Sget_buffer_create); | |
336cd056 | 5721 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 5722 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
5723 | defsubr (&Sbuffer_name); |
5724 | /*defsubr (&Sbuffer_number);*/ | |
5725 | defsubr (&Sbuffer_file_name); | |
336cd056 | 5726 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 5727 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
5728 | defsubr (&Sbuffer_local_variables); |
5729 | defsubr (&Sbuffer_modified_p); | |
5730 | defsubr (&Sset_buffer_modified_p); | |
5731 | defsubr (&Sbuffer_modified_tick); | |
5732 | defsubr (&Srename_buffer); | |
5733 | defsubr (&Sother_buffer); | |
5734 | defsubr (&Sbuffer_disable_undo); | |
5735 | defsubr (&Sbuffer_enable_undo); | |
5736 | defsubr (&Skill_buffer); | |
a9ee7a59 | 5737 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
5738 | defsubr (&Sswitch_to_buffer); |
5739 | defsubr (&Spop_to_buffer); | |
5740 | defsubr (&Scurrent_buffer); | |
5741 | defsubr (&Sset_buffer); | |
5742 | defsubr (&Sbarf_if_buffer_read_only); | |
5743 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
5744 | defsubr (&Serase_buffer); |
5745 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 5746 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 5747 | |
52f8ec73 | 5748 | defsubr (&Soverlayp); |
2eec3b4e RS |
5749 | defsubr (&Smake_overlay); |
5750 | defsubr (&Sdelete_overlay); | |
5751 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
5752 | defsubr (&Soverlay_start); |
5753 | defsubr (&Soverlay_end); | |
5754 | defsubr (&Soverlay_buffer); | |
5755 | defsubr (&Soverlay_properties); | |
2eec3b4e | 5756 | defsubr (&Soverlays_at); |
74514898 | 5757 | defsubr (&Soverlays_in); |
2eec3b4e | 5758 | defsubr (&Snext_overlay_change); |
239c932b | 5759 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
5760 | defsubr (&Soverlay_recenter); |
5761 | defsubr (&Soverlay_lists); | |
5762 | defsubr (&Soverlay_get); | |
5763 | defsubr (&Soverlay_put); | |
a8c21b48 | 5764 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
5765 | } |
5766 | ||
dfcf069d | 5767 | void |
1ab256cb RM |
5768 | keys_of_buffer () |
5769 | { | |
5770 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
5771 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
5772 | |
5773 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
5774 | initialized when that function gets called. */ | |
5775 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 5776 | } |