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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, |
3 | 1995, 1997, 1998, 1999, 2000, 2001, 2002, | |
8cabe764 GM |
4 | 2003, 2004, 2005, 2006, 2007, 2008 |
5 | Free Software Foundation, Inc. | |
1ab256cb RM |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
1ab256cb RM |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
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 | 33 | |
1ab256cb | 34 | |
dfcf069d AS |
35 | #ifdef HAVE_UNISTD_H |
36 | #include <unistd.h> | |
37 | #endif | |
7ee72033 | 38 | |
1ab256cb | 39 | #include "lisp.h" |
21cf4cf8 | 40 | #include "intervals.h" |
1ab256cb RM |
41 | #include "window.h" |
42 | #include "commands.h" | |
43 | #include "buffer.h" | |
8f348ed5 | 44 | #include "character.h" |
28e969dd | 45 | #include "region-cache.h" |
1ab256cb | 46 | #include "indent.h" |
d014bf88 | 47 | #include "blockinput.h" |
2538fae4 | 48 | #include "keyboard.h" |
e35f6ff7 | 49 | #include "keymap.h" |
08460cd4 | 50 | #include "frame.h" |
1ab256cb RM |
51 | |
52 | struct buffer *current_buffer; /* the current buffer */ | |
53 | ||
54 | /* First buffer in chain of all buffers (in reverse order of creation). | |
55 | Threaded through ->next. */ | |
56 | ||
57 | struct buffer *all_buffers; | |
58 | ||
59 | /* This structure holds the default values of the buffer-local variables | |
60 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
61 | The default value occupies the same slot in this structure | |
62 | as an individual buffer's value occupies in that buffer. | |
63 | Setting the default value also goes through the alist of buffers | |
64 | and stores into each buffer that does not say it has a local value. */ | |
65 | ||
6b61353c | 66 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
67 | |
68 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
69 | ||
70 | static Lisp_Object Vbuffer_defaults; | |
71 | ||
72 | /* This structure marks which slots in a buffer have corresponding | |
73 | default values in buffer_defaults. | |
74 | Each such slot has a nonzero value in this structure. | |
75 | The value has only one nonzero bit. | |
76 | ||
77 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
78 | the entry for that slot (found in the same slot in this structure) |
79 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
80 | |
81 | If a slot in this structure is -1, then even though there may | |
82 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
83 | and the corresponding slot in buffer_defaults is not used. | |
84 | ||
85 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
86 | but there is a default value which is copied into each buffer. | |
87 | ||
1ab256cb RM |
88 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
89 | zero, that is a bug */ | |
90 | ||
91 | struct buffer buffer_local_flags; | |
92 | ||
93 | /* This structure holds the names of symbols whose values may be | |
94 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
95 | ||
6b61353c KH |
96 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
97 | ||
1ab256cb RM |
98 | /* A Lisp_Object pointer to the above, used for staticpro */ |
99 | static Lisp_Object Vbuffer_local_symbols; | |
100 | ||
13de9290 RS |
101 | /* Flags indicating which built-in buffer-local variables |
102 | are permanent locals. */ | |
7313acd0 | 103 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
104 | |
105 | /* Number of per-buffer variables used. */ | |
106 | ||
7313acd0 | 107 | int last_per_buffer_idx; |
13de9290 | 108 | |
3709505e SM |
109 | EXFUN (Fset_buffer, 1); |
110 | void set_buffer_internal P_ ((struct buffer *b)); | |
111 | void set_buffer_internal_1 P_ ((struct buffer *b)); | |
112 | static void call_overlay_mod_hooks P_ ((Lisp_Object list, Lisp_Object overlay, | |
113 | int after, Lisp_Object arg1, | |
114 | Lisp_Object arg2, Lisp_Object arg3)); | |
115 | static void swap_out_buffer_local_variables P_ ((struct buffer *b)); | |
116 | static void reset_buffer_local_variables P_ ((struct buffer *b, int permanent_too)); | |
1ab256cb RM |
117 | |
118 | /* Alist of all buffer names vs the buffers. */ | |
119 | /* This used to be a variable, but is no longer, | |
120 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
121 | Lisp_Object Vbuffer_alist; | |
122 | ||
123 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
124 | Lisp_Object Vbefore_change_functions; |
125 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 126 | |
c48f61ef RS |
127 | Lisp_Object Vtransient_mark_mode; |
128 | ||
a96b68f1 RS |
129 | /* t means ignore all read-only text properties. |
130 | A list means ignore such a property if its value is a member of the list. | |
131 | Any non-nil value means ignore buffer-read-only. */ | |
132 | Lisp_Object Vinhibit_read_only; | |
133 | ||
dcdffbf6 RS |
134 | /* List of functions to call that can query about killing a buffer. |
135 | If any of these functions returns nil, we don't kill it. */ | |
136 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 137 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 138 | |
43ed3b8d CY |
139 | /* Hook run before changing a major mode. */ |
140 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
141 | ||
dbc4e1c1 JB |
142 | /* List of functions to call before changing an unmodified buffer. */ |
143 | Lisp_Object Vfirst_change_hook; | |
22378665 | 144 | |
dbc4e1c1 | 145 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
146 | Lisp_Object Qbefore_change_functions; |
147 | Lisp_Object Qafter_change_functions; | |
48265e61 | 148 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 149 | |
7775635d KH |
150 | /* If nonzero, all modification hooks are suppressed. */ |
151 | int inhibit_modification_hooks; | |
152 | ||
1ab256cb | 153 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 154 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
155 | |
156 | Lisp_Object Qprotected_field; | |
157 | ||
158 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
159 | ||
160 | Lisp_Object Qkill_buffer_hook; | |
161 | ||
5fe0b67e RS |
162 | Lisp_Object Qget_file_buffer; |
163 | ||
52f8ec73 JB |
164 | Lisp_Object Qoverlayp; |
165 | ||
bbbe9545 | 166 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 167 | |
294d215f RS |
168 | Lisp_Object Qmodification_hooks; |
169 | Lisp_Object Qinsert_in_front_hooks; | |
170 | Lisp_Object Qinsert_behind_hooks; | |
171 | ||
b86af064 GM |
172 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
173 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 174 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 175 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 176 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 | 177 | |
cab1603f | 178 | extern char * emacs_strerror P_ ((int)); |
b86af064 | 179 | |
1ab256cb RM |
180 | /* For debugging; temporary. See set_buffer_internal. */ |
181 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
182 | ||
01136e9b | 183 | void |
1ab256cb RM |
184 | nsberror (spec) |
185 | Lisp_Object spec; | |
186 | { | |
a7a60ce9 | 187 | if (STRINGP (spec)) |
d5db4077 | 188 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
189 | error ("Invalid buffer argument"); |
190 | } | |
191 | \f | |
0dc88e60 | 192 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
193 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
194 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
195 | (object) | |
0dc88e60 RS |
196 | Lisp_Object object; |
197 | { | |
198 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
199 | ? Qt : Qnil); | |
200 | } | |
201 | ||
08460cd4 | 202 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 203 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
204 | If the optional arg FRAME is a frame, we return the buffer list |
205 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
206 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 207 | (frame) |
08460cd4 | 208 | Lisp_Object frame; |
1ab256cb | 209 | { |
a18b8cb5 | 210 | Lisp_Object general; |
08460cd4 RS |
211 | general = Fmapcar (Qcdr, Vbuffer_alist); |
212 | ||
213 | if (FRAMEP (frame)) | |
214 | { | |
a18b8cb5 KL |
215 | Lisp_Object framelist, prevlist, tail; |
216 | Lisp_Object args[3]; | |
08460cd4 | 217 | |
b7826503 | 218 | CHECK_FRAME (frame); |
08460cd4 RS |
219 | |
220 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 221 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 222 | |
a18b8cb5 KL |
223 | /* Remove from GENERAL any buffer that duplicates one in |
224 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 225 | tail = framelist; |
a18b8cb5 | 226 | while (CONSP (tail)) |
08460cd4 | 227 | { |
7539e11f KR |
228 | general = Fdelq (XCAR (tail), general); |
229 | tail = XCDR (tail); | |
08460cd4 | 230 | } |
a18b8cb5 KL |
231 | tail = prevlist; |
232 | while (CONSP (tail)) | |
233 | { | |
234 | general = Fdelq (XCAR (tail), general); | |
235 | tail = XCDR (tail); | |
236 | } | |
237 | ||
238 | args[0] = framelist; | |
239 | args[1] = general; | |
240 | args[2] = prevlist; | |
241 | return Fnconc (3, args); | |
08460cd4 RS |
242 | } |
243 | ||
244 | return general; | |
1ab256cb RM |
245 | } |
246 | ||
04ae1b48 RS |
247 | /* Like Fassoc, but use Fstring_equal to compare |
248 | (which ignores text properties), | |
249 | and don't ever QUIT. */ | |
250 | ||
251 | static Lisp_Object | |
252 | assoc_ignore_text_properties (key, list) | |
253 | register Lisp_Object key; | |
254 | Lisp_Object list; | |
255 | { | |
256 | register Lisp_Object tail; | |
6d70a280 | 257 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
258 | { |
259 | register Lisp_Object elt, tem; | |
6d70a280 | 260 | elt = XCAR (tail); |
04ae1b48 RS |
261 | tem = Fstring_equal (Fcar (elt), key); |
262 | if (!NILP (tem)) | |
263 | return elt; | |
264 | } | |
265 | return Qnil; | |
266 | } | |
267 | ||
1ab256cb | 268 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 269 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 270 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
271 | NAME may also be a buffer; if so, the value is that buffer. */) |
272 | (name) | |
1ab256cb RM |
273 | register Lisp_Object name; |
274 | { | |
a7a60ce9 | 275 | if (BUFFERP (name)) |
1ab256cb | 276 | return name; |
b7826503 | 277 | CHECK_STRING (name); |
1ab256cb | 278 | |
04ae1b48 | 279 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
280 | } |
281 | ||
282 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 283 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
284 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
285 | If there is no such live buffer, return nil. | |
7ee72033 MB |
286 | See also `find-buffer-visiting'. */) |
287 | (filename) | |
1ab256cb RM |
288 | register Lisp_Object filename; |
289 | { | |
290 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
291 | Lisp_Object handler; |
292 | ||
b7826503 | 293 | CHECK_STRING (filename); |
1ab256cb RM |
294 | filename = Fexpand_file_name (filename, Qnil); |
295 | ||
5fe0b67e RS |
296 | /* If the file name has special constructs in it, |
297 | call the corresponding file handler. */ | |
a617e913 | 298 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
299 | if (!NILP (handler)) |
300 | return call2 (handler, Qget_file_buffer, filename); | |
301 | ||
7539e11f | 302 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 303 | { |
7539e11f | 304 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
305 | if (!BUFFERP (buf)) continue; |
306 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 307 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 308 | if (!NILP (tem)) |
1ab256cb RM |
309 | return buf; |
310 | } | |
311 | return Qnil; | |
312 | } | |
313 | ||
52e01189 RS |
314 | Lisp_Object |
315 | get_truename_buffer (filename) | |
316 | register Lisp_Object filename; | |
317 | { | |
318 | register Lisp_Object tail, buf, tem; | |
319 | ||
7539e11f | 320 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 321 | { |
7539e11f | 322 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
323 | if (!BUFFERP (buf)) continue; |
324 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
325 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
326 | if (!NILP (tem)) | |
327 | return buf; | |
328 | } | |
329 | return Qnil; | |
330 | } | |
331 | ||
1ab256cb RM |
332 | /* Incremented for each buffer created, to assign the buffer number. */ |
333 | int buffer_count; | |
334 | ||
335 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 336 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
337 | A new buffer is created if there is no live buffer named NAME. |
338 | If NAME starts with a space, the new buffer does not keep undo information. | |
339 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
340 | The value is never nil. */) |
341 | (name) | |
1ab256cb RM |
342 | register Lisp_Object name; |
343 | { | |
a9ee7a59 | 344 | register Lisp_Object buf; |
1ab256cb RM |
345 | register struct buffer *b; |
346 | ||
347 | buf = Fget_buffer (name); | |
265a9e55 | 348 | if (!NILP (buf)) |
1ab256cb RM |
349 | return buf; |
350 | ||
d5db4077 | 351 | if (SCHARS (name) == 0) |
31cd83e9 KH |
352 | error ("Empty string for buffer name is not allowed"); |
353 | ||
cc648cef | 354 | b = allocate_buffer (); |
1ab256cb | 355 | |
336cd056 RS |
356 | /* An ordinary buffer uses its own struct buffer_text. */ |
357 | b->text = &b->own_text; | |
358 | b->base_buffer = 0; | |
359 | ||
1ab256cb | 360 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 361 | BLOCK_INPUT; |
3b06f880 KH |
362 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
363 | anchoring a search. */ | |
b86af064 | 364 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 365 | UNBLOCK_INPUT; |
1ab256cb | 366 | if (! BUF_BEG_ADDR (b)) |
81841847 | 367 | buffer_memory_full (); |
1ab256cb | 368 | |
6d70a280 SM |
369 | BUF_PT (b) = BEG; |
370 | BUF_GPT (b) = BEG; | |
371 | BUF_BEGV (b) = BEG; | |
372 | BUF_ZV (b) = BEG; | |
373 | BUF_Z (b) = BEG; | |
374 | BUF_PT_BYTE (b) = BEG_BYTE; | |
375 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
376 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
377 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
378 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 379 | BUF_MODIFF (b) = 1; |
3e145152 | 380 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 381 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
382 | BUF_SAVE_MODIFF (b) = 1; |
383 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
384 | BUF_UNCHANGED_MODIFIED (b) = 1; |
385 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
386 | BUF_END_UNCHANGED (b) = 0; | |
387 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 388 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 389 | |
28e969dd JB |
390 | b->newline_cache = 0; |
391 | b->width_run_cache = 0; | |
392 | b->width_table = Qnil; | |
b5a225b4 | 393 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 394 | |
1ab256cb RM |
395 | /* Put this on the chain of all buffers including killed ones. */ |
396 | b->next = all_buffers; | |
397 | all_buffers = b; | |
398 | ||
336cd056 RS |
399 | /* An ordinary buffer normally doesn't need markers |
400 | to handle BEGV and ZV. */ | |
401 | b->pt_marker = Qnil; | |
402 | b->begv_marker = Qnil; | |
403 | b->zv_marker = Qnil; | |
04ae1b48 RS |
404 | |
405 | name = Fcopy_sequence (name); | |
ab77f05c | 406 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 407 | b->name = name; |
04ae1b48 | 408 | |
67ee9f6e | 409 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
410 | |
411 | reset_buffer (b); | |
13de9290 | 412 | reset_buffer_local_variables (b, 1); |
1ab256cb | 413 | |
1f57cb74 | 414 | b->mark = Fmake_marker (); |
65745fad | 415 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
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 | ||
2f064abf | 422 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
423 | can lead to infinite regress until you run out of stack. rms |
424 | says that's not worth protecting against. */ | |
48265e61 | 425 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 426 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
427 | call1 (Qucs_set_table_for_input, buf); |
428 | ||
336cd056 RS |
429 | return buf; |
430 | } | |
431 | ||
7e9d5818 | 432 | |
04e4cb3a GM |
433 | /* Return a list of overlays which is a copy of the overlay list |
434 | LIST, but for buffer B. */ | |
435 | ||
2410d73a | 436 | static struct Lisp_Overlay * |
04e4cb3a GM |
437 | copy_overlays (b, list) |
438 | struct buffer *b; | |
2410d73a | 439 | struct Lisp_Overlay *list; |
04e4cb3a | 440 | { |
2410d73a SM |
441 | Lisp_Object buffer; |
442 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
443 | |
444 | XSETBUFFER (buffer, b); | |
445 | ||
2410d73a | 446 | for (; list; list = list->next) |
04e4cb3a GM |
447 | { |
448 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 449 | EMACS_INT charpos; |
04e4cb3a | 450 | |
2410d73a | 451 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
452 | charpos = marker_position (OVERLAY_START (old_overlay)); |
453 | start = Fmake_marker (); | |
db3a49a6 | 454 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
455 | XMARKER (start)->insertion_type |
456 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
457 | ||
458 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
459 | end = Fmake_marker (); | |
db3a49a6 | 460 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
461 | XMARKER (end)->insertion_type |
462 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
463 | ||
464 | overlay = allocate_misc (); | |
465 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
466 | OVERLAY_START (overlay) = start; | |
467 | OVERLAY_END (overlay) = end; | |
468 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 469 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 470 | |
2410d73a SM |
471 | if (tail) |
472 | tail = tail->next = XOVERLAY (overlay); | |
473 | else | |
474 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
475 | } |
476 | ||
2410d73a | 477 | return result; |
04e4cb3a | 478 | } |
177c0ea7 | 479 | |
04e4cb3a | 480 | |
7e9d5818 GM |
481 | /* Clone per-buffer values of buffer FROM. |
482 | ||
483 | Buffer TO gets the same per-buffer values as FROM, with the | |
484 | following exceptions: (1) TO's name is left untouched, (2) markers | |
485 | are copied and made to refer to TO, and (3) overlay lists are | |
486 | copied. */ | |
487 | ||
488 | static void | |
489 | clone_per_buffer_values (from, to) | |
490 | struct buffer *from, *to; | |
491 | { | |
54622f33 | 492 | Lisp_Object to_buffer; |
7e9d5818 GM |
493 | int offset; |
494 | ||
495 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 496 | |
3ee24aec SM |
497 | /* buffer-local Lisp variables start at `undo_list', |
498 | tho only the ones from `name' on are GC'd normally. */ | |
499 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list) + sizeof (Lisp_Object); | |
7e9d5818 GM |
500 | offset < sizeof *to; |
501 | offset += sizeof (Lisp_Object)) | |
502 | { | |
503 | Lisp_Object obj; | |
504 | ||
505 | obj = PER_BUFFER_VALUE (from, offset); | |
506 | if (MARKERP (obj)) | |
507 | { | |
508 | struct Lisp_Marker *m = XMARKER (obj); | |
509 | obj = Fmake_marker (); | |
510 | XMARKER (obj)->insertion_type = m->insertion_type; | |
511 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
512 | } | |
513 | ||
514 | PER_BUFFER_VALUE (to, offset) = obj; | |
515 | } | |
516 | ||
7e9d5818 | 517 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 518 | |
04e4cb3a GM |
519 | to->overlays_before = copy_overlays (to, from->overlays_before); |
520 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 521 | |
e1688f54 RS |
522 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
523 | and install that in TO. */ | |
524 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
525 | } |
526 | ||
7e9d5818 GM |
527 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
528 | 2, 3, | |
193c3837 | 529 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 530 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 531 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
532 | NAME should be a string which is not the name of an existing buffer. |
533 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
534 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
535 | CLONE nil means the indirect buffer's state is reset to default values. */) |
536 | (base_buffer, name, clone) | |
7e9d5818 | 537 | Lisp_Object base_buffer, name, clone; |
336cd056 | 538 | { |
6b61353c | 539 | Lisp_Object buf, tem; |
7e9d5818 | 540 | struct buffer *b; |
336cd056 | 541 | |
6b61353c | 542 | CHECK_STRING (name); |
336cd056 RS |
543 | buf = Fget_buffer (name); |
544 | if (!NILP (buf)) | |
d5db4077 | 545 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 546 | |
6b61353c | 547 | tem = base_buffer; |
336cd056 RS |
548 | base_buffer = Fget_buffer (base_buffer); |
549 | if (NILP (base_buffer)) | |
6b61353c KH |
550 | error ("No such buffer: `%s'", SDATA (tem)); |
551 | if (NILP (XBUFFER (base_buffer)->name)) | |
552 | error ("Base buffer has been killed"); | |
336cd056 | 553 | |
d5db4077 | 554 | if (SCHARS (name) == 0) |
336cd056 RS |
555 | error ("Empty string for buffer name is not allowed"); |
556 | ||
cc648cef | 557 | b = allocate_buffer (); |
336cd056 | 558 | |
67ee9f6e SM |
559 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
560 | ? XBUFFER (base_buffer)->base_buffer | |
561 | : XBUFFER (base_buffer)); | |
336cd056 RS |
562 | |
563 | /* Use the base buffer's text object. */ | |
564 | b->text = b->base_buffer->text; | |
565 | ||
566 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
567 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
568 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
569 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
570 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
571 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
572 | |
573 | b->newline_cache = 0; | |
574 | b->width_run_cache = 0; | |
575 | b->width_table = Qnil; | |
576 | ||
577 | /* Put this on the chain of all buffers including killed ones. */ | |
578 | b->next = all_buffers; | |
579 | all_buffers = b; | |
580 | ||
581 | name = Fcopy_sequence (name); | |
ab77f05c | 582 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
583 | b->name = name; |
584 | ||
585 | reset_buffer (b); | |
13de9290 | 586 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
587 | |
588 | /* Put this in the alist of all live buffers. */ | |
589 | XSETBUFFER (buf, b); | |
590 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
591 | ||
592 | b->mark = Fmake_marker (); | |
1ab256cb | 593 | b->name = name; |
336cd056 | 594 | |
abc9d959 RS |
595 | /* The multibyte status belongs to the base buffer. */ |
596 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
597 | ||
336cd056 RS |
598 | /* Make sure the base buffer has markers for its narrowing. */ |
599 | if (NILP (b->base_buffer->pt_marker)) | |
600 | { | |
601 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
602 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
603 | BUF_PT (b->base_buffer), | |
604 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
605 | } |
606 | if (NILP (b->base_buffer->begv_marker)) | |
607 | { | |
608 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
609 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
610 | BUF_BEGV (b->base_buffer), | |
611 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
612 | } |
613 | if (NILP (b->base_buffer->zv_marker)) | |
614 | { | |
615 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
616 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
617 | BUF_ZV (b->base_buffer), | |
618 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 619 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
620 | } |
621 | ||
7e9d5818 GM |
622 | if (NILP (clone)) |
623 | { | |
624 | /* Give the indirect buffer markers for its narrowing. */ | |
625 | b->pt_marker = Fmake_marker (); | |
626 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
627 | b->begv_marker = Fmake_marker (); | |
628 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
629 | b->zv_marker = Fmake_marker (); | |
630 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
631 | XMARKER (b->zv_marker)->insertion_type = 1; | |
632 | } | |
633 | else | |
7fa57e45 RS |
634 | { |
635 | struct buffer *old_b = current_buffer; | |
636 | ||
637 | clone_per_buffer_values (b->base_buffer, b); | |
638 | b->filename = Qnil; | |
639 | b->file_truename = Qnil; | |
640 | b->display_count = make_number (0); | |
641 | b->backed_up = Qnil; | |
642 | b->auto_save_file_name = Qnil; | |
643 | set_buffer_internal_1 (b); | |
644 | Fset (intern ("buffer-save-without-query"), Qnil); | |
645 | Fset (intern ("buffer-file-number"), Qnil); | |
646 | Fset (intern ("buffer-stale-function"), Qnil); | |
647 | set_buffer_internal_1 (old_b); | |
648 | } | |
336cd056 | 649 | |
a9ee7a59 | 650 | return buf; |
1ab256cb RM |
651 | } |
652 | ||
d4f5719a SM |
653 | void |
654 | delete_all_overlays (b) | |
655 | struct buffer *b; | |
656 | { | |
657 | Lisp_Object overlay; | |
658 | ||
659 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
660 | have to empty the list, otherwise we end up with overlays that | |
661 | think they belong to this buffer while the buffer doesn't know about | |
662 | them any more. */ | |
663 | while (b->overlays_before) | |
664 | { | |
665 | XSETMISC (overlay, b->overlays_before); | |
666 | Fdelete_overlay (overlay); | |
667 | } | |
668 | while (b->overlays_after) | |
669 | { | |
670 | XSETMISC (overlay, b->overlays_after); | |
671 | Fdelete_overlay (overlay); | |
672 | } | |
673 | eassert (b->overlays_before == NULL); | |
674 | eassert (b->overlays_after == NULL); | |
675 | } | |
676 | ||
bcd40520 | 677 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 678 | and local variables. |
d4f5719a SM |
679 | If called on an already-initialized buffer, the list of overlays |
680 | should be deleted before calling this function, otherwise we end up | |
681 | with overlays that claim to belong to the buffer but the buffer | |
682 | claims it doesn't belong to it. */ | |
1ab256cb RM |
683 | |
684 | void | |
685 | reset_buffer (b) | |
686 | register struct buffer *b; | |
687 | { | |
688 | b->filename = Qnil; | |
f6ed2e84 | 689 | b->file_truename = Qnil; |
1ab256cb RM |
690 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
691 | b->modtime = 0; | |
8d7a4592 | 692 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 693 | b->last_window_start = 1; |
8b264726 | 694 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
695 | b->clip_changed = 0; |
696 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
697 | b->backed_up = Qnil; |
698 | b->auto_save_modified = 0; | |
84f6bcba | 699 | b->auto_save_failure_time = -1; |
1ab256cb RM |
700 | b->auto_save_file_name = Qnil; |
701 | b->read_only = Qnil; | |
2410d73a SM |
702 | b->overlays_before = NULL; |
703 | b->overlays_after = NULL; | |
c2d5b10f | 704 | b->overlay_center = BEG; |
dfda7a7f | 705 | b->mark_active = Qnil; |
943e065b | 706 | b->point_before_scroll = Qnil; |
be9aafdd | 707 | b->file_format = Qnil; |
71ed49fa | 708 | b->auto_save_file_format = Qt; |
0dc6f165 | 709 | b->last_selected_window = Qnil; |
7962a441 | 710 | XSETINT (b->display_count, 0); |
3fd364db | 711 | b->display_time = Qnil; |
1bf08baf | 712 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 713 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 714 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
715 | |
716 | b->display_error_modiff = 0; | |
1ab256cb RM |
717 | } |
718 | ||
bcd40520 RS |
719 | /* Reset buffer B's local variables info. |
720 | Don't use this on a buffer that has already been in use; | |
721 | it does not treat permanent locals consistently. | |
13de9290 RS |
722 | Instead, use Fkill_all_local_variables. |
723 | ||
3709505e | 724 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
725 | buffer-local variables. If PERMANENT_TOO is 0, |
726 | we preserve those. */ | |
bcd40520 | 727 | |
13de9290 RS |
728 | static void |
729 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 730 | register struct buffer *b; |
13de9290 | 731 | int permanent_too; |
1ab256cb RM |
732 | { |
733 | register int offset; | |
7c02e886 | 734 | int i; |
1ab256cb RM |
735 | |
736 | /* Reset the major mode to Fundamental, together with all the | |
737 | things that depend on the major mode. | |
738 | default-major-mode is handled at a higher level. | |
739 | We ignore it here. */ | |
740 | b->major_mode = Qfundamental_mode; | |
741 | b->keymap = Qnil; | |
1ab256cb RM |
742 | b->mode_name = QSFundamental; |
743 | b->minor_modes = Qnil; | |
3446af9c RS |
744 | |
745 | /* If the standard case table has been altered and invalidated, | |
746 | fix up its insides first. */ | |
747 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
748 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
749 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
750 | Fset_standard_case_table (Vascii_downcase_table); | |
751 | ||
1ab256cb | 752 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
753 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
754 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
755 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 756 | b->invisibility_spec = Qt; |
2e716096 RS |
757 | #ifndef DOS_NT |
758 | b->buffer_file_type = Qnil; | |
759 | #endif | |
3cb719bd | 760 | |
13de9290 | 761 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
762 | if (permanent_too) |
763 | b->local_var_alist = Qnil; | |
764 | else | |
765 | { | |
2f7a359d | 766 | Lisp_Object tmp, prop, last = Qnil; |
3709505e SM |
767 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
768 | if (CONSP (XCAR (tmp)) | |
769 | && SYMBOLP (XCAR (XCAR (tmp))) | |
2f7a359d RS |
770 | && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
771 | { | |
772 | /* If permanent-local, keep it. */ | |
773 | last = tmp; | |
774 | if (EQ (prop, Qpermanent_local_hook)) | |
775 | { | |
776 | /* This is a partially permanent hook variable. | |
777 | Preserve only the elements that want to be preserved. */ | |
778 | Lisp_Object list, newlist; | |
779 | list = XCDR (XCAR (tmp)); | |
780 | if (!CONSP (list)) | |
781 | newlist = list; | |
782 | else | |
783 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
784 | { | |
785 | Lisp_Object elt = XCAR (list); | |
786 | /* Preserve element ELT if it's t, | |
787 | if it is a function with a `permanent-local-hook' property, | |
788 | or if it's not a symbol. */ | |
789 | if (! SYMBOLP (elt) | |
790 | || EQ (elt, Qt) | |
791 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
792 | newlist = Fcons (elt, newlist); | |
793 | } | |
794 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
795 | } | |
796 | } | |
797 | /* Delete this local variable. */ | |
3709505e SM |
798 | else if (NILP (last)) |
799 | b->local_var_alist = XCDR (tmp); | |
800 | else | |
801 | XSETCDR (last, XCDR (tmp)); | |
802 | } | |
803 | ||
7313acd0 | 804 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 805 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 806 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
807 | |
808 | /* For each slot that has a default value, | |
809 | copy that into the slot. */ | |
810 | ||
3ee24aec SM |
811 | /* buffer-local Lisp variables start at `undo_list', |
812 | tho only the ones from `name' on are GC'd normally. */ | |
813 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
814 | offset < sizeof *b; |
815 | offset += sizeof (Lisp_Object)) | |
aab80822 | 816 | { |
7313acd0 | 817 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
818 | if ((idx > 0 |
819 | && (permanent_too | |
820 | || buffer_permanent_local_flags[idx] == 0)) | |
821 | /* Is -2 used anywhere? */ | |
822 | || idx == -2) | |
7313acd0 | 823 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 824 | } |
1ab256cb RM |
825 | } |
826 | ||
01050cb5 RM |
827 | /* We split this away from generate-new-buffer, because rename-buffer |
828 | and set-visited-file-name ought to be able to use this to really | |
829 | rename the buffer properly. */ | |
830 | ||
831 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 832 | 1, 2, 0, |
7ee72033 | 833 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
834 | If there is no live buffer named NAME, then return NAME. |
835 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 836 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
837 | Optional second argument IGNORE specifies a name that is okay to use (if |
838 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 839 | (name, ignore) |
c273e647 | 840 | register Lisp_Object name, ignore; |
1ab256cb RM |
841 | { |
842 | register Lisp_Object gentemp, tem; | |
843 | int count; | |
844 | char number[10]; | |
845 | ||
b7826503 | 846 | CHECK_STRING (name); |
1ab256cb | 847 | |
6b61353c KH |
848 | tem = Fstring_equal (name, ignore); |
849 | if (!NILP (tem)) | |
850 | return name; | |
1ab256cb | 851 | tem = Fget_buffer (name); |
265a9e55 | 852 | if (NILP (tem)) |
01050cb5 | 853 | return name; |
1ab256cb RM |
854 | |
855 | count = 1; | |
856 | while (1) | |
857 | { | |
858 | sprintf (number, "<%d>", ++count); | |
859 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 860 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
861 | if (!NILP (tem)) |
862 | return gentemp; | |
1ab256cb | 863 | tem = Fget_buffer (gentemp); |
265a9e55 | 864 | if (NILP (tem)) |
01050cb5 | 865 | return gentemp; |
1ab256cb RM |
866 | } |
867 | } | |
868 | ||
869 | \f | |
870 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
871 | doc: /* Return the name of BUFFER, as a string. |
872 | With no argument or nil as argument, return the name of the current buffer. */) | |
873 | (buffer) | |
1ab256cb RM |
874 | register Lisp_Object buffer; |
875 | { | |
265a9e55 | 876 | if (NILP (buffer)) |
1ab256cb | 877 | return current_buffer->name; |
b7826503 | 878 | CHECK_BUFFER (buffer); |
1ab256cb RM |
879 | return XBUFFER (buffer)->name; |
880 | } | |
881 | ||
882 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
883 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
884 | No argument or nil as argument means use the current buffer. */) | |
885 | (buffer) | |
1ab256cb RM |
886 | register Lisp_Object buffer; |
887 | { | |
265a9e55 | 888 | if (NILP (buffer)) |
1ab256cb | 889 | return current_buffer->filename; |
b7826503 | 890 | CHECK_BUFFER (buffer); |
1ab256cb RM |
891 | return XBUFFER (buffer)->filename; |
892 | } | |
893 | ||
336cd056 RS |
894 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
895 | 0, 1, 0, | |
7ee72033 | 896 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
897 | If BUFFER is not indirect, return nil. |
898 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 899 | (buffer) |
336cd056 RS |
900 | register Lisp_Object buffer; |
901 | { | |
902 | struct buffer *base; | |
903 | Lisp_Object base_buffer; | |
904 | ||
905 | if (NILP (buffer)) | |
906 | base = current_buffer->base_buffer; | |
907 | else | |
908 | { | |
b7826503 | 909 | CHECK_BUFFER (buffer); |
336cd056 RS |
910 | base = XBUFFER (buffer)->base_buffer; |
911 | } | |
912 | ||
913 | if (! base) | |
914 | return Qnil; | |
915 | XSETBUFFER (base_buffer, base); | |
916 | return base_buffer; | |
917 | } | |
918 | ||
79aa712d | 919 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 920 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
921 | doc: /* Return the value of VARIABLE in BUFFER. |
922 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
923 | is the default binding of the variable. */) |
924 | (variable, buffer) | |
925 | register Lisp_Object variable; | |
79aa712d RS |
926 | register Lisp_Object buffer; |
927 | { | |
928 | register struct buffer *buf; | |
929 | register Lisp_Object result; | |
ad97b375 | 930 | struct Lisp_Symbol *sym; |
79aa712d | 931 | |
5e2ad10b | 932 | CHECK_SYMBOL (variable); |
ae69175b | 933 | CHECK_BUFFER (buffer); |
79aa712d RS |
934 | buf = XBUFFER (buffer); |
935 | ||
ad97b375 SM |
936 | sym = indirect_variable (XSYMBOL (variable)); |
937 | XSETSYMBOL (variable, sym); | |
0e4d0c9a | 938 | |
79aa712d | 939 | /* Look in local_var_list */ |
5e2ad10b | 940 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 941 | if (NILP (result)) |
79aa712d RS |
942 | { |
943 | int offset, idx; | |
944 | int found = 0; | |
945 | ||
946 | /* Look in special slots */ | |
3ee24aec SM |
947 | /* buffer-local Lisp variables start at `undo_list', |
948 | tho only the ones from `name' on are GC'd normally. */ | |
949 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
79aa712d RS |
950 | offset < sizeof (struct buffer); |
951 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
952 | offset += (sizeof (EMACS_INT))) | |
953 | { | |
954 | idx = PER_BUFFER_IDX (offset); | |
955 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 956 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 957 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
958 | { |
959 | result = PER_BUFFER_VALUE (buf, offset); | |
960 | found = 1; | |
961 | break; | |
962 | } | |
963 | } | |
964 | ||
965 | if (!found) | |
5e2ad10b | 966 | result = Fdefault_value (variable); |
79aa712d RS |
967 | } |
968 | else | |
f0bac7de RS |
969 | { |
970 | Lisp_Object valcontents; | |
971 | Lisp_Object current_alist_element; | |
972 | ||
973 | /* What binding is loaded right now? */ | |
ad97b375 | 974 | valcontents = sym->value; |
f0bac7de RS |
975 | current_alist_element |
976 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
977 | ||
978 | /* The value of the currently loaded binding is not | |
979 | stored in it, but rather in the realvalue slot. | |
980 | Store that value into the binding it belongs to | |
981 | in case that is the one we are about to use. */ | |
982 | ||
983 | Fsetcdr (current_alist_element, | |
984 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
985 | ||
986 | /* Now get the (perhaps updated) value out of the binding. */ | |
987 | result = XCDR (result); | |
988 | } | |
79aa712d | 989 | |
4c4dc0b0 KS |
990 | if (!EQ (result, Qunbound)) |
991 | return result; | |
79aa712d | 992 | |
4c4dc0b0 | 993 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
994 | } |
995 | ||
e1688f54 | 996 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 997 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
998 | in special slots in the buffer object. */ |
999 | ||
1000 | static Lisp_Object | |
1001 | buffer_lisp_local_variables (buf) | |
1002 | struct buffer *buf; | |
1003 | { | |
1004 | Lisp_Object result = Qnil; | |
1005 | register Lisp_Object tail; | |
1006 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
1007 | { | |
1008 | Lisp_Object val, elt; | |
1009 | ||
1010 | elt = XCAR (tail); | |
1011 | ||
1012 | /* Reference each variable in the alist in buf. | |
1013 | If inquiring about the current buffer, this gets the current values, | |
1014 | so store them into the alist so the alist is up to date. | |
1015 | If inquiring about some other buffer, this swaps out any values | |
1016 | for that buffer, making the alist up to date automatically. */ | |
1017 | val = find_symbol_value (XCAR (elt)); | |
1018 | /* Use the current buffer value only if buf is the current buffer. */ | |
1019 | if (buf != current_buffer) | |
1020 | val = XCDR (elt); | |
1021 | ||
1022 | /* If symbol is unbound, put just the symbol in the list. */ | |
1023 | if (EQ (val, Qunbound)) | |
1024 | result = Fcons (XCAR (elt), result); | |
1025 | /* Otherwise, put (symbol . value) in the list. */ | |
1026 | else | |
1027 | result = Fcons (Fcons (XCAR (elt), val), result); | |
1028 | } | |
1029 | ||
1030 | return result; | |
1031 | } | |
1032 | ||
1ab256cb | 1033 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1034 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1035 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1036 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1037 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1038 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
1039 | No argument or nil as argument means use current buffer as BUFFER. */) |
1040 | (buffer) | |
1ab256cb RM |
1041 | register Lisp_Object buffer; |
1042 | { | |
1043 | register struct buffer *buf; | |
553defa4 | 1044 | register Lisp_Object result; |
1ab256cb | 1045 | |
265a9e55 | 1046 | if (NILP (buffer)) |
1ab256cb RM |
1047 | buf = current_buffer; |
1048 | else | |
1049 | { | |
b7826503 | 1050 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1051 | buf = XBUFFER (buffer); |
1052 | } | |
1053 | ||
e1688f54 | 1054 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1055 | |
1ab256cb RM |
1056 | /* Add on all the variables stored in special slots. */ |
1057 | { | |
7c02e886 | 1058 | int offset, idx; |
1ab256cb | 1059 | |
3ee24aec SM |
1060 | /* buffer-local Lisp variables start at `undo_list', |
1061 | tho only the ones from `name' on are GC'd normally. */ | |
1062 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1063 | offset < sizeof (struct buffer); |
7c02e886 GM |
1064 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1065 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1066 | { |
7313acd0 GM |
1067 | idx = PER_BUFFER_IDX (offset); |
1068 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1069 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1070 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1071 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1072 | result); |
1ab256cb RM |
1073 | } |
1074 | } | |
553defa4 RS |
1075 | |
1076 | return result; | |
1ab256cb | 1077 | } |
1ab256cb RM |
1078 | \f |
1079 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1080 | 0, 1, 0, |
7ee72033 MB |
1081 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1082 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1083 | (buffer) | |
1ab256cb RM |
1084 | register Lisp_Object buffer; |
1085 | { | |
1086 | register struct buffer *buf; | |
265a9e55 | 1087 | if (NILP (buffer)) |
1ab256cb RM |
1088 | buf = current_buffer; |
1089 | else | |
1090 | { | |
b7826503 | 1091 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1092 | buf = XBUFFER (buffer); |
1093 | } | |
1094 | ||
336cd056 | 1095 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1096 | } |
1097 | ||
1098 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1099 | 1, 1, 0, |
7ee72033 MB |
1100 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1101 | A non-nil FLAG means mark the buffer modified. */) | |
1102 | (flag) | |
1ab256cb RM |
1103 | register Lisp_Object flag; |
1104 | { | |
1105 | register int already; | |
1106 | register Lisp_Object fn; | |
8ec01c70 | 1107 | Lisp_Object buffer, window; |
1ab256cb RM |
1108 | |
1109 | #ifdef CLASH_DETECTION | |
1110 | /* If buffer becoming modified, lock the file. | |
1111 | If buffer becoming unmodified, unlock the file. */ | |
1112 | ||
60f4dd23 | 1113 | fn = current_buffer->file_truename; |
90d456d2 KH |
1114 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1115 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1116 | { |
336cd056 | 1117 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1118 | if (!already && !NILP (flag)) |
1ab256cb | 1119 | lock_file (fn); |
265a9e55 | 1120 | else if (already && NILP (flag)) |
1ab256cb RM |
1121 | unlock_file (fn); |
1122 | } | |
1123 | #endif /* CLASH_DETECTION */ | |
1124 | ||
336cd056 | 1125 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1126 | |
8ec01c70 GM |
1127 | /* Set update_mode_lines only if buffer is displayed in some window. |
1128 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1129 | state by recording/restoring the state around blocks of code. | |
1130 | Setting update_mode_lines makes redisplay consider all windows | |
1131 | (on all frames). Stealth fontification of buffers not displayed | |
1132 | would incur additional redisplay costs if we'd set | |
1133 | update_modes_lines unconditionally. | |
1134 | ||
1135 | Ideally, I think there should be another mechanism for fontifying | |
1136 | buffers without "modifying" buffers, or redisplay should be | |
1137 | smarter about updating the `*' in mode lines. --gerd */ | |
1138 | XSETBUFFER (buffer, current_buffer); | |
1139 | window = Fget_buffer_window (buffer, Qt); | |
1140 | if (WINDOWP (window)) | |
d57b83b3 GM |
1141 | { |
1142 | ++update_mode_lines; | |
1143 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1144 | } | |
177c0ea7 | 1145 | |
1ab256cb RM |
1146 | return flag; |
1147 | } | |
1148 | ||
a8c21b48 GM |
1149 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1150 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1151 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1152 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1153 | state of the current buffer. Use with care. */) |
1154 | (flag) | |
a8c21b48 GM |
1155 | Lisp_Object flag; |
1156 | { | |
1157 | #ifdef CLASH_DETECTION | |
1158 | Lisp_Object fn; | |
177c0ea7 | 1159 | |
a8c21b48 GM |
1160 | /* If buffer becoming modified, lock the file. |
1161 | If buffer becoming unmodified, unlock the file. */ | |
1162 | ||
1163 | fn = current_buffer->file_truename; | |
1164 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1165 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1166 | { | |
1167 | int already = SAVE_MODIFF < MODIFF; | |
1168 | if (!already && !NILP (flag)) | |
1169 | lock_file (fn); | |
1170 | else if (already && NILP (flag)) | |
1171 | unlock_file (fn); | |
1172 | } | |
1173 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1174 | |
a8c21b48 GM |
1175 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1176 | return flag; | |
1177 | } | |
1178 | ||
1ab256cb | 1179 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1180 | 0, 1, 0, |
7ee72033 | 1181 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1182 | Each buffer has a tick counter which is incremented each time the |
1183 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1184 | No argument or nil as argument means use current buffer as BUFFER. */) |
1185 | (buffer) | |
1ab256cb RM |
1186 | register Lisp_Object buffer; |
1187 | { | |
1188 | register struct buffer *buf; | |
265a9e55 | 1189 | if (NILP (buffer)) |
1ab256cb RM |
1190 | buf = current_buffer; |
1191 | else | |
1192 | { | |
b7826503 | 1193 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1194 | buf = XBUFFER (buffer); |
1195 | } | |
1196 | ||
1197 | return make_number (BUF_MODIFF (buf)); | |
1198 | } | |
3e145152 CY |
1199 | |
1200 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1201 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1202 | doc: /* Return BUFFER's character-change tick counter. | |
1203 | Each buffer has a character-change tick counter, which is set to the | |
1204 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1205 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1206 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1207 | you can tell whether a character change occurred in that buffer in |
1208 | between these calls. No argument or nil as argument means use current | |
1209 | buffer as BUFFER. */) | |
1210 | (buffer) | |
1211 | register Lisp_Object buffer; | |
1212 | { | |
1213 | register struct buffer *buf; | |
1214 | if (NILP (buffer)) | |
1215 | buf = current_buffer; | |
1216 | else | |
1217 | { | |
1218 | CHECK_BUFFER (buffer); | |
1219 | buf = XBUFFER (buffer); | |
1220 | } | |
1221 | ||
1222 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1223 | } | |
1ab256cb | 1224 | \f |
01050cb5 | 1225 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1226 | "(list (read-string \"Rename buffer (to new name): \" \ |
1227 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1228 | current-prefix-arg)", | |
7ee72033 | 1229 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1230 | If second arg UNIQUE is nil or omitted, it is an error if a |
1231 | buffer named NEWNAME already exists. | |
1232 | If UNIQUE is non-nil, come up with a new name using | |
1233 | `generate-new-buffer-name'. | |
1234 | Interactively, you can set UNIQUE with a prefix argument. | |
1235 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1236 | This does not change the name of the visited file (if any). */) |
1237 | (newname, unique) | |
489c043a | 1238 | register Lisp_Object newname, unique; |
1ab256cb RM |
1239 | { |
1240 | register Lisp_Object tem, buf; | |
1241 | ||
b7826503 | 1242 | CHECK_STRING (newname); |
d59698c4 | 1243 | |
d5db4077 | 1244 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1245 | error ("Empty string is invalid as a buffer name"); |
1246 | ||
489c043a | 1247 | tem = Fget_buffer (newname); |
265a9e55 | 1248 | if (!NILP (tem)) |
01050cb5 | 1249 | { |
8801a864 KR |
1250 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1251 | rename the buffer automatically so you can create another | |
1252 | with the original name. It makes UNIQUE equivalent to | |
1253 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1254 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1255 | return current_buffer->name; | |
3bd779aa | 1256 | if (!NILP (unique)) |
489c043a | 1257 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1258 | else |
d5db4077 | 1259 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1260 | } |
1ab256cb | 1261 | |
489c043a | 1262 | current_buffer->name = newname; |
76f590d7 JB |
1263 | |
1264 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1265 | any windows displaying current_buffer will stay unchanged. */ | |
1266 | update_mode_lines++; | |
1267 | ||
67180c6a | 1268 | XSETBUFFER (buf, current_buffer); |
489c043a | 1269 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1270 | if (NILP (current_buffer->filename) |
1271 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1272 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1273 | /* Refetch since that last call may have done GC. */ |
1274 | return current_buffer->name; | |
1ab256cb RM |
1275 | } |
1276 | ||
773fbdb9 | 1277 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1278 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1279 | Buffers not visible in windows are preferred to visible buffers, |
1280 | unless optional second argument VISIBLE-OK is non-nil. | |
1281 | If the optional third argument FRAME is non-nil, use that frame's | |
1282 | buffer list instead of the selected frame's buffer list. | |
1283 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1284 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1285 | (buffer, visible_ok, frame) | |
773fbdb9 | 1286 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1287 | { |
89132f25 | 1288 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1289 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1290 | notsogood = Qnil; |
1291 | ||
773fbdb9 | 1292 | if (NILP (frame)) |
9ba9623d | 1293 | frame = selected_frame; |
773fbdb9 | 1294 | |
7962a441 | 1295 | tail = Vbuffer_alist; |
773fbdb9 | 1296 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1297 | |
1298 | /* Consider buffers that have been seen in the selected frame | |
1299 | before other buffers. */ | |
177c0ea7 | 1300 | |
773fbdb9 | 1301 | tem = frame_buffer_list (frame); |
7962a441 RS |
1302 | add_ons = Qnil; |
1303 | while (CONSP (tem)) | |
1304 | { | |
7539e11f KR |
1305 | if (BUFFERP (XCAR (tem))) |
1306 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1307 | tem = XCDR (tem); | |
7962a441 RS |
1308 | } |
1309 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1310 | ||
6d70a280 | 1311 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1312 | { |
6d70a280 | 1313 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1314 | if (EQ (buf, buffer)) |
1315 | continue; | |
6b61353c KH |
1316 | if (NILP (buf)) |
1317 | continue; | |
1318 | if (NILP (XBUFFER (buf)->name)) | |
1319 | continue; | |
10ceceb8 | 1320 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1321 | continue; |
04ae1b48 RS |
1322 | /* If the selected frame has a buffer_predicate, |
1323 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1324 | if (!NILP (pred)) |
04ae1b48 | 1325 | { |
7962a441 | 1326 | tem = call1 (pred, buf); |
04ae1b48 RS |
1327 | if (NILP (tem)) |
1328 | continue; | |
1329 | } | |
04ae1b48 | 1330 | |
a0ebb746 | 1331 | if (NILP (visible_ok)) |
66ffe51c | 1332 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1333 | else |
1334 | tem = Qnil; | |
265a9e55 | 1335 | if (NILP (tem)) |
1ab256cb | 1336 | return buf; |
265a9e55 | 1337 | if (NILP (notsogood)) |
1ab256cb RM |
1338 | notsogood = buf; |
1339 | } | |
265a9e55 | 1340 | if (!NILP (notsogood)) |
1ab256cb | 1341 | return notsogood; |
dba1a30a GM |
1342 | buf = Fget_buffer (build_string ("*scratch*")); |
1343 | if (NILP (buf)) | |
1344 | { | |
1345 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1346 | Fset_buffer_major_mode (buf); | |
1347 | } | |
89132f25 | 1348 | return buf; |
1ab256cb RM |
1349 | } |
1350 | \f | |
1ab256cb RM |
1351 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1352 | 0, 1, "", | |
7ee72033 MB |
1353 | doc: /* Start keeping undo information for buffer BUFFER. |
1354 | No argument or nil as argument means do this for the current buffer. */) | |
1355 | (buffer) | |
ffd56f97 | 1356 | register Lisp_Object buffer; |
1ab256cb | 1357 | { |
ffd56f97 | 1358 | Lisp_Object real_buffer; |
1ab256cb | 1359 | |
ffd56f97 | 1360 | if (NILP (buffer)) |
67180c6a | 1361 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1362 | else |
1363 | { | |
ffd56f97 JB |
1364 | real_buffer = Fget_buffer (buffer); |
1365 | if (NILP (real_buffer)) | |
1366 | nsberror (buffer); | |
1ab256cb RM |
1367 | } |
1368 | ||
ffd56f97 JB |
1369 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1370 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1371 | |
1372 | return Qnil; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1377 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1378 | The buffer being killed will be current while the hook is running.\n\ | |
1379 | See `kill-buffer'." | |
1380 | */ | |
1381 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1382 | doc: /* Kill the buffer BUFFER. |
f6e22881 JB |
1383 | The argument may be a buffer or the name of a buffer. |
1384 | With a nil argument, kill the current buffer. | |
018ba359 | 1385 | |
f6e22881 | 1386 | Value is t if the buffer is actually killed, nil otherwise. |
018ba359 | 1387 | |
f6e22881 JB |
1388 | The functions in `kill-buffer-query-functions' are called with BUFFER as |
1389 | the current buffer. If any of them returns nil, the buffer is not killed. | |
1390 | ||
1391 | The hook `kill-buffer-hook' is run before the buffer is actually killed. | |
1392 | The buffer being killed will be current while the hook is running. | |
018ba359 PJ |
1393 | |
1394 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1395 | with SIGHUP. */) |
1396 | (buffer) | |
a25f13ae | 1397 | Lisp_Object buffer; |
1ab256cb RM |
1398 | { |
1399 | Lisp_Object buf; | |
1400 | register struct buffer *b; | |
1401 | register Lisp_Object tem; | |
1402 | register struct Lisp_Marker *m; | |
6af718a4 | 1403 | struct gcpro gcpro1; |
1ab256cb | 1404 | |
a25f13ae | 1405 | if (NILP (buffer)) |
1ab256cb RM |
1406 | buf = Fcurrent_buffer (); |
1407 | else | |
a25f13ae | 1408 | buf = Fget_buffer (buffer); |
265a9e55 | 1409 | if (NILP (buf)) |
a25f13ae | 1410 | nsberror (buffer); |
1ab256cb RM |
1411 | |
1412 | b = XBUFFER (buf); | |
1413 | ||
4a4a9db5 KH |
1414 | /* Avoid trouble for buffer already dead. */ |
1415 | if (NILP (b->name)) | |
1416 | return Qnil; | |
1417 | ||
1ab256cb | 1418 | /* Query if the buffer is still modified. */ |
265a9e55 | 1419 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1420 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1421 | { |
a25f13ae | 1422 | GCPRO1 (buf); |
5c4930b0 RS |
1423 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1424 | b->name, make_number (0))); | |
1ab256cb | 1425 | UNGCPRO; |
265a9e55 | 1426 | if (NILP (tem)) |
1ab256cb RM |
1427 | return Qnil; |
1428 | } | |
1429 | ||
dcdffbf6 | 1430 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1431 | { |
aed13378 | 1432 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1433 | Lisp_Object arglist[1]; |
1ab256cb RM |
1434 | |
1435 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1436 | set_buffer_internal (b); | |
dcdffbf6 RS |
1437 | |
1438 | /* First run the query functions; if any query is answered no, | |
1439 | don't kill the buffer. */ | |
5b20caf0 | 1440 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1441 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1442 | if (NILP (tem)) | |
5b20caf0 | 1443 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1444 | |
1445 | /* Then run the hooks. */ | |
f1597a3a | 1446 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1447 | unbind_to (count, Qnil); |
1448 | } | |
1449 | ||
1450 | /* We have no more questions to ask. Verify that it is valid | |
1451 | to kill the buffer. This must be done after the questions | |
1452 | since anything can happen within do_yes_or_no_p. */ | |
1453 | ||
1454 | /* Don't kill the minibuffer now current. */ | |
1455 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1456 | return Qnil; | |
1457 | ||
265a9e55 | 1458 | if (NILP (b->name)) |
1ab256cb RM |
1459 | return Qnil; |
1460 | ||
336cd056 RS |
1461 | /* When we kill a base buffer, kill all its indirect buffers. |
1462 | We do it at this stage so nothing terrible happens if they | |
1463 | ask questions or their hooks get errors. */ | |
1464 | if (! b->base_buffer) | |
1465 | { | |
1466 | struct buffer *other; | |
1467 | ||
1468 | GCPRO1 (buf); | |
1469 | ||
1470 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1471 | /* all_buffers contains dead buffers too; |
1472 | don't re-kill them. */ | |
1473 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1474 | { |
1475 | Lisp_Object buf; | |
1476 | XSETBUFFER (buf, other); | |
1477 | Fkill_buffer (buf); | |
1478 | } | |
1479 | ||
1480 | UNGCPRO; | |
1481 | } | |
177c0ea7 | 1482 | |
1ab256cb RM |
1483 | /* Make this buffer not be current. |
1484 | In the process, notice if this is the sole visible buffer | |
1485 | and give up if so. */ | |
1486 | if (b == current_buffer) | |
1487 | { | |
773fbdb9 | 1488 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1489 | Fset_buffer (tem); |
1490 | if (b == current_buffer) | |
1491 | return Qnil; | |
1492 | } | |
1493 | ||
77270fac GM |
1494 | /* Notice if the buffer to kill is the sole visible buffer |
1495 | when we're currently in the mini-buffer, and give up if so. */ | |
1496 | XSETBUFFER (tem, current_buffer); | |
1497 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1498 | { | |
1499 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1500 | if (EQ (buf, tem)) |
1501 | return Qnil; | |
1502 | } | |
1503 | ||
1ab256cb RM |
1504 | /* Now there is no question: we can kill the buffer. */ |
1505 | ||
1506 | #ifdef CLASH_DETECTION | |
1507 | /* Unlock this buffer's file, if it is locked. */ | |
1508 | unlock_buffer (b); | |
1509 | #endif /* CLASH_DETECTION */ | |
1510 | ||
49da74e6 | 1511 | GCPRO1 (buf); |
1ab256cb | 1512 | kill_buffer_processes (buf); |
49da74e6 KS |
1513 | UNGCPRO; |
1514 | ||
1515 | /* Killing buffer processes may run sentinels which may | |
1516 | have called kill-buffer. */ | |
1517 | ||
1518 | if (NILP (b->name)) | |
1519 | return Qnil; | |
1520 | ||
b93fb365 | 1521 | clear_charpos_cache (b); |
1ab256cb RM |
1522 | |
1523 | tem = Vinhibit_quit; | |
1524 | Vinhibit_quit = Qt; | |
00550f94 | 1525 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1526 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1527 | frames_discard_buffer (buf); |
1ab256cb RM |
1528 | Vinhibit_quit = tem; |
1529 | ||
9cf712eb RS |
1530 | /* Delete any auto-save file, if we saved it in this session. |
1531 | But not if the buffer is modified. */ | |
a7a60ce9 | 1532 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1533 | && b->auto_save_modified != 0 |
9cf712eb | 1534 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
6b61353c KH |
1535 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1536 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1537 | { |
1538 | Lisp_Object tem; | |
1539 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1540 | if (! NILP (tem)) |
cbb6a418 | 1541 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1542 | } |
1543 | ||
4a4a9db5 KH |
1544 | if (b->base_buffer) |
1545 | { | |
1546 | /* Unchain all markers that belong to this indirect buffer. | |
1547 | Don't unchain the markers that belong to the base buffer | |
1548 | or its other indirect buffers. */ | |
65745fad | 1549 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1550 | { |
65745fad | 1551 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1552 | if (m->buffer == b) |
65745fad SM |
1553 | unchain_marker (m); |
1554 | m = next; | |
4a4a9db5 KH |
1555 | } |
1556 | } | |
1557 | else | |
1ab256cb | 1558 | { |
4a4a9db5 | 1559 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1560 | and leave them pointing nowhere. */ |
65745fad | 1561 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1562 | { |
65745fad | 1563 | struct Lisp_Marker *next = m->next; |
336cd056 | 1564 | m->buffer = 0; |
65745fad SM |
1565 | m->next = NULL; |
1566 | m = next; | |
336cd056 | 1567 | } |
65745fad | 1568 | BUF_MARKERS (b) = NULL; |
336cd056 | 1569 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1570 | |
1571 | /* Perhaps we should explicitly free the interval tree here... */ | |
1572 | } | |
33f7013e | 1573 | |
2f3f993b RS |
1574 | /* Reset the local variables, so that this buffer's local values |
1575 | won't be protected from GC. They would be protected | |
1576 | if they happened to remain encached in their symbols. | |
1577 | This gets rid of them for certain. */ | |
1578 | swap_out_buffer_local_variables (b); | |
13de9290 | 1579 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1580 | |
1ab256cb | 1581 | b->name = Qnil; |
336cd056 | 1582 | |
9ac0d9e0 | 1583 | BLOCK_INPUT; |
336cd056 | 1584 | if (! b->base_buffer) |
b86af064 | 1585 | free_buffer_text (b); |
336cd056 | 1586 | |
28e969dd JB |
1587 | if (b->newline_cache) |
1588 | { | |
1589 | free_region_cache (b->newline_cache); | |
1590 | b->newline_cache = 0; | |
1591 | } | |
1592 | if (b->width_run_cache) | |
1593 | { | |
1594 | free_region_cache (b->width_run_cache); | |
1595 | b->width_run_cache = 0; | |
1596 | } | |
1597 | b->width_table = Qnil; | |
9ac0d9e0 | 1598 | UNBLOCK_INPUT; |
1ab256cb RM |
1599 | b->undo_list = Qnil; |
1600 | ||
1601 | return Qt; | |
1602 | } | |
1603 | \f | |
36a8c287 JB |
1604 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1605 | we do this each time BUF is selected visibly, the more recently | |
1606 | selected buffers are always closer to the front of the list. This | |
1607 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1608 | |
01136e9b | 1609 | void |
1ab256cb RM |
1610 | record_buffer (buf) |
1611 | Lisp_Object buf; | |
1612 | { | |
1613 | register Lisp_Object link, prev; | |
773fbdb9 | 1614 | Lisp_Object frame; |
9ba9623d | 1615 | frame = selected_frame; |
1ab256cb RM |
1616 | |
1617 | prev = Qnil; | |
7539e11f | 1618 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1619 | { |
7539e11f | 1620 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1621 | break; |
1622 | prev = link; | |
1623 | } | |
1624 | ||
36a8c287 JB |
1625 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1626 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1627 | |
265a9e55 | 1628 | if (NILP (prev)) |
7539e11f | 1629 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1630 | else |
f3fbd155 | 1631 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1632 | |
f3fbd155 | 1633 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1634 | Vbuffer_alist = link; |
7962a441 | 1635 | |
a18b8cb5 | 1636 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1637 | |
a18b8cb5 KL |
1638 | prev = Qnil; |
1639 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1640 | link = XCDR (link)) | |
1641 | { | |
1642 | if (EQ (XCAR (link), buf)) | |
1643 | { | |
1644 | if (NILP (prev)) | |
1645 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1646 | else | |
1647 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1648 | break; | |
1649 | } | |
1650 | prev = link; | |
1651 | } | |
1652 | ||
7962a441 RS |
1653 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1654 | ||
1655 | prev = Qnil; | |
773fbdb9 | 1656 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1657 | link = XCDR (link)) |
7962a441 | 1658 | { |
7539e11f | 1659 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1660 | break; |
1661 | prev = link; | |
1662 | } | |
1663 | ||
1664 | /* Effectively do delq. */ | |
1665 | ||
1666 | if (CONSP (link)) | |
1667 | { | |
1668 | if (NILP (prev)) | |
773fbdb9 | 1669 | set_frame_buffer_list (frame, |
7539e11f | 1670 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1671 | else |
f3fbd155 | 1672 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1673 | |
f3fbd155 | 1674 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1675 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1676 | } |
1677 | else | |
773fbdb9 | 1678 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1679 | } |
1680 | ||
a9ee7a59 | 1681 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1682 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1683 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1684 | according to `default-major-mode'. |
018ba359 | 1685 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1686 | the current buffer's major mode. */) |
1687 | (buffer) | |
a2428fa2 | 1688 | Lisp_Object buffer; |
a9ee7a59 KH |
1689 | { |
1690 | int count; | |
1691 | Lisp_Object function; | |
1692 | ||
ea4fddd8 JB |
1693 | CHECK_BUFFER (buffer); |
1694 | ||
71a0f2c6 | 1695 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1696 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1697 | function = find_symbol_value (intern ("initial-major-mode")); |
1698 | else | |
1699 | { | |
1700 | function = buffer_defaults.major_mode; | |
1701 | if (NILP (function) | |
1702 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1703 | function = current_buffer->major_mode; | |
1704 | } | |
177c0ea7 | 1705 | |
48265e61 DL |
1706 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1707 | return Qnil; | |
1708 | ||
aed13378 | 1709 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1710 | |
48265e61 DL |
1711 | /* To select a nonfundamental mode, |
1712 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1713 | |
1714 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1715 | ||
a2428fa2 | 1716 | Fset_buffer (buffer); |
48265e61 | 1717 | call0 (function); |
a9ee7a59 KH |
1718 | |
1719 | return unbind_to (count, Qnil); | |
1720 | } | |
1721 | ||
2594e0fd RS |
1722 | /* If switching buffers in WINDOW would be an error, return |
1723 | a C string saying what the error would be. */ | |
1724 | ||
1725 | char * | |
1726 | no_switch_window (window) | |
1727 | Lisp_Object window; | |
1ab256cb | 1728 | { |
1ab256cb | 1729 | Lisp_Object tem; |
2594e0fd RS |
1730 | if (EQ (minibuf_window, window)) |
1731 | return "Cannot switch buffers in minibuffer window"; | |
1732 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1733 | if (EQ (tem, Qt)) |
2594e0fd RS |
1734 | return "Cannot switch buffers in a dedicated window"; |
1735 | return NULL; | |
1736 | } | |
1737 | ||
1738 | /* Switch to buffer BUFFER in the selected window. | |
1739 | If NORECORD is non-nil, don't call record_buffer. */ | |
1740 | ||
1741 | Lisp_Object | |
1742 | switch_to_buffer_1 (buffer, norecord) | |
1743 | Lisp_Object buffer, norecord; | |
1744 | { | |
1745 | register Lisp_Object buf; | |
1ab256cb | 1746 | |
a25f13ae | 1747 | if (NILP (buffer)) |
773fbdb9 | 1748 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1749 | else |
a9ee7a59 | 1750 | { |
a25f13ae | 1751 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1752 | if (NILP (buf)) |
1753 | { | |
a25f13ae | 1754 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1755 | Fset_buffer_major_mode (buf); |
1756 | } | |
1757 | } | |
1ab256cb | 1758 | Fset_buffer (buf); |
265a9e55 | 1759 | if (NILP (norecord)) |
1ab256cb RM |
1760 | record_buffer (buf); |
1761 | ||
1762 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1763 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1764 | : selected_window, | |
2ad8731a | 1765 | buf, Qnil); |
1ab256cb | 1766 | |
cd0c235a | 1767 | return buf; |
1ab256cb RM |
1768 | } |
1769 | ||
88970542 JL |
1770 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1771 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
7ee72033 | 1772 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1773 | If BUFFER does not identify an existing buffer, |
1774 | then this function creates a buffer with that name. | |
1775 | ||
1776 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1777 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1778 | using `other-buffer'. | |
018ba359 PJ |
1779 | Optional second arg NORECORD non-nil means |
1780 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1781 | This function returns the buffer it switched to. |
018ba359 PJ |
1782 | |
1783 | WARNING: This is NOT the way to work on another buffer temporarily | |
1784 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1785 | the window-buffer correspondences. */) |
1786 | (buffer, norecord) | |
2594e0fd RS |
1787 | Lisp_Object buffer, norecord; |
1788 | { | |
1789 | char *err; | |
1790 | ||
27c6b98e | 1791 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
fab45703 | 1792 | { |
611ac521 RS |
1793 | /* Basically a NOP. Avoid signalling an error in the case where |
1794 | the selected window is dedicated, or a minibuffer. */ | |
1795 | ||
1796 | /* But do put this buffer at the front of the buffer list, | |
1797 | unless that has been inhibited. Note that even if | |
1798 | BUFFER is at the front of the main buffer-list already, | |
1799 | we still want to move it to the front of the frame's buffer list. */ | |
1800 | if (NILP (norecord)) | |
fab45703 | 1801 | record_buffer (buffer); |
fab45703 NR |
1802 | return Fset_buffer (buffer); |
1803 | } | |
27c6b98e | 1804 | |
2594e0fd | 1805 | err = no_switch_window (selected_window); |
1c55ebd1 SM |
1806 | if (err) |
1807 | /* If can't display in current window, let pop-to-buffer | |
1808 | try some other window. */ | |
1809 | return call3 (intern ("pop-to-buffer"), buffer, Qnil, norecord); | |
2594e0fd RS |
1810 | |
1811 | return switch_to_buffer_1 (buffer, norecord); | |
1812 | } | |
1813 | ||
1ab256cb | 1814 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 MB |
1815 | doc: /* Return the current buffer as a Lisp object. */) |
1816 | () | |
1ab256cb RM |
1817 | { |
1818 | register Lisp_Object buf; | |
67180c6a | 1819 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1820 | return buf; |
1821 | } | |
1822 | \f | |
7ec44ec6 GM |
1823 | /* Set the current buffer to B. |
1824 | ||
1825 | We previously set windows_or_buffers_changed here to invalidate | |
1826 | global unchanged information in beg_unchanged and end_unchanged. | |
1827 | This is no longer necessary because we now compute unchanged | |
1828 | information on a buffer-basis. Every action affecting other | |
1829 | windows than the selected one requires a select_window at some | |
1830 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1831 | |
1832 | void | |
1833 | set_buffer_internal (b) | |
1834 | register struct buffer *b; | |
1835 | { | |
b5a225b4 | 1836 | if (current_buffer != b) |
7ec44ec6 | 1837 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1838 | } |
1839 | ||
1840 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1841 | This is used by redisplay. */ | |
1842 | ||
1843 | void | |
1844 | set_buffer_internal_1 (b) | |
1845 | register struct buffer *b; | |
1846 | { | |
1847 | register struct buffer *old_buf; | |
1848 | register Lisp_Object tail, valcontents; | |
1849 | Lisp_Object tem; | |
1850 | ||
b86af064 | 1851 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1852 | if (b->text->beg == NULL) |
b86af064 GM |
1853 | enlarge_buffer_text (b, 0); |
1854 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1855 | |
c7aa5005 KH |
1856 | if (current_buffer == b) |
1857 | return; | |
1858 | ||
1ab256cb RM |
1859 | old_buf = current_buffer; |
1860 | current_buffer = b; | |
1861 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1862 | ||
336cd056 RS |
1863 | if (old_buf) |
1864 | { | |
1865 | /* Put the undo list back in the base buffer, so that it appears | |
1866 | that an indirect buffer shares the undo list of its base. */ | |
1867 | if (old_buf->base_buffer) | |
1868 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1869 | ||
1870 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1871 | when it is not current, update them now. */ | |
1872 | if (! NILP (old_buf->pt_marker)) | |
1873 | { | |
1874 | Lisp_Object obuf; | |
1875 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1876 | set_marker_both (old_buf->pt_marker, obuf, |
1877 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1878 | } |
1879 | if (! NILP (old_buf->begv_marker)) | |
1880 | { | |
1881 | Lisp_Object obuf; | |
1882 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1883 | set_marker_both (old_buf->begv_marker, obuf, |
1884 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1885 | } |
1886 | if (! NILP (old_buf->zv_marker)) | |
1887 | { | |
1888 | Lisp_Object obuf; | |
1889 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1890 | set_marker_both (old_buf->zv_marker, obuf, |
1891 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1892 | } |
1893 | } | |
1894 | ||
1895 | /* Get the undo list from the base buffer, so that it appears | |
1896 | that an indirect buffer shares the undo list of its base. */ | |
1897 | if (b->base_buffer) | |
1898 | b->undo_list = b->base_buffer->undo_list; | |
1899 | ||
1900 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1901 | when it is not current, fetch them now. */ | |
1902 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1903 | { |
1904 | BUF_PT (b) = marker_position (b->pt_marker); | |
1905 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1906 | } | |
336cd056 | 1907 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1908 | { |
1909 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1910 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1911 | } | |
336cd056 | 1912 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1913 | { |
1914 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1915 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1916 | } | |
336cd056 | 1917 | |
1ab256cb RM |
1918 | /* Look down buffer's list of local Lisp variables |
1919 | to find and update any that forward into C variables. */ | |
1920 | ||
65745fad | 1921 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1922 | { |
f5c1dd0d | 1923 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
67ee9f6e | 1924 | if ((BUFFER_LOCAL_VALUEP (valcontents)) |
3d871c85 | 1925 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1926 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1927 | /* Just reference the variable |
1928 | to cause it to become set for this buffer. */ | |
7539e11f | 1929 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1930 | } |
1931 | ||
1932 | /* Do the same with any others that were local to the previous buffer */ | |
1933 | ||
1934 | if (old_buf) | |
65745fad | 1935 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1936 | { |
f5c1dd0d | 1937 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
67ee9f6e | 1938 | if ((BUFFER_LOCAL_VALUEP (valcontents)) |
3d871c85 | 1939 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1940 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1941 | /* Just reference the variable |
1942 | to cause it to become set for this buffer. */ | |
7539e11f | 1943 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1944 | } |
1945 | } | |
1946 | ||
336cd056 | 1947 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1948 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1949 | |
1950 | void | |
1951 | set_buffer_temp (b) | |
1952 | struct buffer *b; | |
1953 | { | |
1954 | register struct buffer *old_buf; | |
1955 | ||
1956 | if (current_buffer == b) | |
1957 | return; | |
1958 | ||
1959 | old_buf = current_buffer; | |
1960 | current_buffer = b; | |
1961 | ||
1962 | if (old_buf) | |
1963 | { | |
1964 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1965 | when it is not current, update them now. */ | |
1966 | if (! NILP (old_buf->pt_marker)) | |
1967 | { | |
1968 | Lisp_Object obuf; | |
1969 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1970 | set_marker_both (old_buf->pt_marker, obuf, |
1971 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1972 | } |
1973 | if (! NILP (old_buf->begv_marker)) | |
1974 | { | |
1975 | Lisp_Object obuf; | |
1976 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1977 | set_marker_both (old_buf->begv_marker, obuf, |
1978 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1979 | } |
1980 | if (! NILP (old_buf->zv_marker)) | |
1981 | { | |
1982 | Lisp_Object obuf; | |
1983 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1984 | set_marker_both (old_buf->zv_marker, obuf, |
1985 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1986 | } |
1987 | } | |
1988 | ||
1989 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1990 | when it is not current, fetch them now. */ | |
1991 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1992 | { |
1993 | BUF_PT (b) = marker_position (b->pt_marker); | |
1994 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1995 | } | |
336cd056 | 1996 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1997 | { |
1998 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1999 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
2000 | } | |
336cd056 | 2001 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
2002 | { |
2003 | BUF_ZV (b) = marker_position (b->zv_marker); | |
2004 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
2005 | } | |
336cd056 RS |
2006 | } |
2007 | ||
1ab256cb | 2008 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 2009 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
2010 | BUFFER may be a buffer or the name of an existing buffer. |
2011 | See also `save-excursion' when you want to make a buffer current temporarily. | |
2012 | This function does not display the buffer, so its effect ends | |
2013 | when the current command terminates. | |
7ee72033 MB |
2014 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
2015 | (buffer) | |
a25f13ae | 2016 | register Lisp_Object buffer; |
1ab256cb | 2017 | { |
a25f13ae KH |
2018 | register Lisp_Object buf; |
2019 | buf = Fget_buffer (buffer); | |
2020 | if (NILP (buf)) | |
2021 | nsberror (buffer); | |
2022 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 2023 | error ("Selecting deleted buffer"); |
a25f13ae KH |
2024 | set_buffer_internal (XBUFFER (buf)); |
2025 | return buf; | |
1ab256cb | 2026 | } |
d0628b06 RS |
2027 | |
2028 | /* Set the current buffer to BUFFER provided it is alive. */ | |
2029 | ||
2030 | Lisp_Object | |
2031 | set_buffer_if_live (buffer) | |
2032 | Lisp_Object buffer; | |
2033 | { | |
2034 | if (! NILP (XBUFFER (buffer)->name)) | |
2035 | Fset_buffer (buffer); | |
2036 | return Qnil; | |
2037 | } | |
1ab256cb RM |
2038 | \f |
2039 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2040 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2041 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2042 | () | |
1ab256cb | 2043 | { |
a96b68f1 RS |
2044 | if (!NILP (current_buffer->read_only) |
2045 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2046 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2047 | return Qnil; |
2048 | } | |
2049 | ||
2050 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 2051 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
2052 | There it is the least likely candidate for `other-buffer' to return; |
2053 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 2054 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
2055 | If BUFFER is nil or omitted, bury the current buffer. |
2056 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
2057 | selected window if it is displayed there. */) |
2058 | (buffer) | |
a2428fa2 | 2059 | register Lisp_Object buffer; |
1ab256cb | 2060 | { |
b271272a | 2061 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 2062 | if (NILP (buffer)) |
a5611885 | 2063 | { |
c58dab63 | 2064 | Lisp_Object tem; |
a2428fa2 | 2065 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2066 | |
c58dab63 | 2067 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2068 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2069 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2070 | { |
2071 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2072 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2073 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2074 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2075 | else | |
2076 | Fdelete_window (selected_window); | |
2077 | } | |
a5611885 | 2078 | } |
1ab256cb RM |
2079 | else |
2080 | { | |
2081 | Lisp_Object buf1; | |
177c0ea7 | 2082 | |
a2428fa2 | 2083 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2084 | if (NILP (buf1)) |
a2428fa2 EN |
2085 | nsberror (buffer); |
2086 | buffer = buf1; | |
b271272a JB |
2087 | } |
2088 | ||
a1a8b28e GM |
2089 | /* Move buffer to the end of the buffer list. Do nothing if the |
2090 | buffer is killed. */ | |
2091 | if (!NILP (XBUFFER (buffer)->name)) | |
2092 | { | |
2093 | Lisp_Object aelt, link; | |
b271272a | 2094 | |
a1a8b28e GM |
2095 | aelt = Frassq (buffer, Vbuffer_alist); |
2096 | link = Fmemq (aelt, Vbuffer_alist); | |
2097 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2098 | XSETCDR (link, Qnil); |
a1a8b28e | 2099 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2100 | |
a18b8cb5 KL |
2101 | XFRAME (selected_frame)->buffer_list |
2102 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2103 | XFRAME (selected_frame)->buried_buffer_list | |
2104 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2105 | } |
dec989eb | 2106 | |
1ab256cb RM |
2107 | return Qnil; |
2108 | } | |
2109 | \f | |
c922bc55 | 2110 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2111 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2112 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2113 | so the buffer is truly empty after this. */) |
2114 | () | |
1ab256cb RM |
2115 | { |
2116 | Fwiden (); | |
c0d9a0c3 GM |
2117 | |
2118 | del_range (BEG, Z); | |
c280bc6a | 2119 | |
1ab256cb RM |
2120 | current_buffer->last_window_start = 1; |
2121 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2122 | if future size is less than past size. Use of erase-buffer | |
2123 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2124 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2125 | return Qnil; |
2126 | } | |
2127 | ||
01136e9b | 2128 | void |
1ab256cb RM |
2129 | validate_region (b, e) |
2130 | register Lisp_Object *b, *e; | |
2131 | { | |
b7826503 PJ |
2132 | CHECK_NUMBER_COERCE_MARKER (*b); |
2133 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2134 | |
2135 | if (XINT (*b) > XINT (*e)) | |
2136 | { | |
03192067 KH |
2137 | Lisp_Object tem; |
2138 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2139 | } |
2140 | ||
2141 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2142 | && XINT (*e) <= ZV)) | |
2143 | args_out_of_range (*b, *e); | |
2144 | } | |
2145 | \f | |
b05525fa RS |
2146 | /* Advance BYTE_POS up to a character boundary |
2147 | and return the adjusted position. */ | |
2148 | ||
2149 | static int | |
2150 | advance_to_char_boundary (byte_pos) | |
2151 | int byte_pos; | |
2152 | { | |
f8449323 | 2153 | int c; |
b05525fa | 2154 | |
f8449323 RS |
2155 | if (byte_pos == BEG) |
2156 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2157 | return BEG; |
f8449323 RS |
2158 | |
2159 | c = FETCH_BYTE (byte_pos); | |
2160 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2161 | { |
1be6387d | 2162 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2163 | multibyte sequence. */ |
a9bcded1 KH |
2164 | int orig_byte_pos = byte_pos; |
2165 | ||
2166 | do | |
2167 | { | |
2168 | byte_pos--; | |
2169 | c = FETCH_BYTE (byte_pos); | |
2170 | } | |
2171 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2172 | INC_POS (byte_pos); |
a9bcded1 KH |
2173 | if (byte_pos < orig_byte_pos) |
2174 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2175 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2176 | surely advance to the correct character boundary. If C is | |
2177 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2178 | } |
2179 | ||
20773569 | 2180 | return byte_pos; |
b05525fa RS |
2181 | } |
2182 | ||
13cda5f9 SM |
2183 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2184 | 1, 1, 0, | |
2185 | doc: /* Swap the text between current buffer and BUFFER. */) | |
2186 | (buffer) | |
2187 | Lisp_Object buffer; | |
2188 | { | |
2189 | struct buffer *other_buffer; | |
2190 | CHECK_BUFFER (buffer); | |
2191 | other_buffer = XBUFFER (buffer); | |
2192 | ||
2193 | /* Actually, it probably works just fine. | |
2194 | * if (other_buffer == current_buffer) | |
2195 | * error ("Cannot swap a buffer's text with itself"); */ | |
2196 | ||
2197 | /* Actually, this may be workable as well, tho probably only if they're | |
2198 | *both* indirect. */ | |
2199 | if (other_buffer->base_buffer | |
2200 | || current_buffer->base_buffer) | |
2201 | error ("Cannot swap indirect buffers's text"); | |
2202 | ||
2203 | { /* This is probably harder to make work. */ | |
2204 | struct buffer *other; | |
2205 | for (other = all_buffers; other; other = other->next) | |
2206 | if (other->base_buffer == other_buffer | |
2207 | || other->base_buffer == current_buffer) | |
2208 | error ("One of the buffers to swap has indirect buffers"); | |
2209 | } | |
2210 | ||
2211 | #define swapfield(field, type) \ | |
2212 | do { \ | |
2213 | type tmp##field = other_buffer->field; \ | |
2214 | other_buffer->field = current_buffer->field; \ | |
2215 | current_buffer->field = tmp##field; \ | |
2216 | } while (0) | |
2217 | ||
2218 | swapfield (own_text, struct buffer_text); | |
2219 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2220 | eassert (other_buffer->text == &other_buffer->own_text); | |
2221 | swapfield (pt, EMACS_INT); | |
2222 | swapfield (pt_byte, EMACS_INT); | |
2223 | swapfield (begv, EMACS_INT); | |
2224 | swapfield (begv_byte, EMACS_INT); | |
2225 | swapfield (zv, EMACS_INT); | |
2226 | swapfield (zv_byte, EMACS_INT); | |
2227 | eassert (!current_buffer->base_buffer); | |
2228 | eassert (!other_buffer->base_buffer); | |
2229 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2230 | swapfield (newline_cache, struct region_cache *); | |
2231 | swapfield (width_run_cache, struct region_cache *); | |
2232 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2233 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2234 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2235 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2236 | swapfield (overlay_center, EMACS_INT); | |
2237 | swapfield (undo_list, Lisp_Object); | |
2238 | swapfield (mark, Lisp_Object); | |
2239 | if (MARKERP (current_buffer->mark) && XMARKER (current_buffer->mark)->buffer) | |
2240 | XMARKER (current_buffer->mark)->buffer = current_buffer; | |
2241 | if (MARKERP (other_buffer->mark) && XMARKER (other_buffer->mark)->buffer) | |
2242 | XMARKER (other_buffer->mark)->buffer = other_buffer; | |
2243 | swapfield (enable_multibyte_characters, Lisp_Object); | |
2244 | /* FIXME: Not sure what we should do with these *_marker fields. | |
2245 | Hopefully they're just nil anyway. */ | |
2246 | swapfield (pt_marker, Lisp_Object); | |
2247 | swapfield (begv_marker, Lisp_Object); | |
2248 | swapfield (zv_marker, Lisp_Object); | |
2249 | current_buffer->point_before_scroll = Qnil; | |
2250 | other_buffer->point_before_scroll = Qnil; | |
2251 | ||
2252 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2253 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2254 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2255 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2256 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
2257 | other_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2258 | other_buffer->text->end_unchanged = current_buffer->text->gpt; | |
2259 | { | |
2260 | struct Lisp_Marker *m; | |
2261 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2262 | if (m->buffer == other_buffer) | |
2263 | m->buffer = current_buffer; | |
2264 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) | |
2265 | if (m->buffer == current_buffer) | |
2266 | m->buffer = other_buffer; | |
2267 | } | |
2268 | if (current_buffer->text->intervals) | |
2269 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2270 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2271 | if (other_buffer->text->intervals) | |
2272 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2273 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2274 | ||
2275 | return Qnil; | |
2276 | } | |
2277 | ||
3ac81adb RS |
2278 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2279 | 1, 1, 0, | |
7ee72033 | 2280 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2281 | If FLAG is t, this makes the buffer a multibyte buffer. |
2282 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2283 | In these cases, the buffer contents remain unchanged as a sequence of |
2284 | bytes but the contents viewed as characters do change. | |
2285 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2286 | all eight-bit bytes to eight-bit characters. |
2287 | If the multibyte flag was really changed, undo information of the | |
2288 | current buffer is cleared. */) | |
7ee72033 | 2289 | (flag) |
3ac81adb RS |
2290 | Lisp_Object flag; |
2291 | { | |
65745fad | 2292 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2293 | struct buffer *other; |
458c8af4 | 2294 | int begv, zv; |
8d1203ea | 2295 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2296 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2297 | Lisp_Object old_undo = current_buffer->undo_list; |
2298 | struct gcpro gcpro1; | |
3ac81adb | 2299 | |
6e553d5e RS |
2300 | if (current_buffer->base_buffer) |
2301 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2302 | ||
70e77119 AS |
2303 | /* Do nothing if nothing actually changes. */ |
2304 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2305 | return flag; | |
2306 | ||
38babc07 KS |
2307 | GCPRO1 (old_undo); |
2308 | ||
2309 | /* Don't record these buffer changes. We will put a special undo entry | |
2310 | instead. */ | |
2311 | current_buffer->undo_list = Qt; | |
b05525fa | 2312 | |
3ac81adb RS |
2313 | /* If the cached position is for this buffer, clear it out. */ |
2314 | clear_charpos_cache (current_buffer); | |
2315 | ||
458c8af4 KH |
2316 | if (NILP (flag)) |
2317 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2318 | else | |
2319 | begv = BEGV, zv = ZV; | |
2320 | ||
a9bcded1 KH |
2321 | if (narrowed) |
2322 | Fwiden (); | |
2323 | ||
3ac81adb RS |
2324 | if (NILP (flag)) |
2325 | { | |
a9bcded1 KH |
2326 | int pos, stop; |
2327 | unsigned char *p; | |
2328 | ||
3ac81adb RS |
2329 | /* Do this first, so it can use CHAR_TO_BYTE |
2330 | to calculate the old correspondences. */ | |
2331 | set_intervals_multibyte (0); | |
2332 | ||
2333 | current_buffer->enable_multibyte_characters = Qnil; | |
2334 | ||
2335 | Z = Z_BYTE; | |
2336 | BEGV = BEGV_BYTE; | |
2337 | ZV = ZV_BYTE; | |
2338 | GPT = GPT_BYTE; | |
2339 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2340 | ||
60ebfdf3 | 2341 | |
65745fad SM |
2342 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2343 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2344 | |
2345 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2346 | pos = BEG; | |
2347 | stop = GPT; | |
2348 | p = BEG_ADDR; | |
2349 | while (1) | |
2350 | { | |
2351 | int c, bytes; | |
2352 | ||
2353 | if (pos == stop) | |
2354 | { | |
2355 | if (pos == Z) | |
2356 | break; | |
2357 | p = GAP_END_ADDR; | |
2358 | stop = Z; | |
2359 | } | |
8f348ed5 KH |
2360 | if (ASCII_BYTE_P (*p)) |
2361 | p++, pos++; | |
2362 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2363 | { |
31285a8f | 2364 | c = STRING_CHAR_AND_LENGTH (p, stop - pos, bytes); |
a9bcded1 KH |
2365 | /* Delete all bytes for this 8-bit character but the |
2366 | last one, and change the last one to the charcter | |
2367 | code. */ | |
2368 | bytes--; | |
2369 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2370 | p = GAP_END_ADDR; | |
2371 | *p++ = c; | |
2372 | pos++; | |
2373 | if (begv > pos) | |
2374 | begv -= bytes; | |
2375 | if (zv > pos) | |
2376 | zv -= bytes; | |
2377 | stop = Z; | |
2378 | } | |
8f924df7 | 2379 | else |
8f348ed5 KH |
2380 | { |
2381 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2382 | p += bytes, pos += bytes; | |
2383 | } | |
a9bcded1 KH |
2384 | } |
2385 | if (narrowed) | |
2386 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2387 | } |
2388 | else | |
2389 | { | |
a9bcded1 KH |
2390 | int pt = PT; |
2391 | int pos, stop; | |
8f348ed5 | 2392 | unsigned char *p, *pend; |
a9bcded1 | 2393 | |
673c57d2 | 2394 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2395 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2396 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2397 | |
8f924df7 | 2398 | if (EQ (flag, Qt) |
a3a303df | 2399 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2400 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2401 | { | |
2402 | unsigned char *p = GPT_ADDR - 1; | |
2403 | ||
2404 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2405 | if (BASE_LEADING_CODE_P (*p)) | |
2406 | { | |
2407 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2408 | ||
2409 | move_gap_both (new_gpt, new_gpt); | |
2410 | } | |
2411 | } | |
2412 | ||
a9bcded1 KH |
2413 | /* Make the buffer contents valid as multibyte by converting |
2414 | 8-bit characters to multibyte form. */ | |
2415 | pos = BEG; | |
2416 | stop = GPT; | |
2417 | p = BEG_ADDR; | |
8f348ed5 | 2418 | pend = GPT_ADDR; |
a9bcded1 KH |
2419 | while (1) |
2420 | { | |
2421 | int bytes; | |
2422 | ||
2423 | if (pos == stop) | |
2424 | { | |
2425 | if (pos == Z) | |
2426 | break; | |
2427 | p = GAP_END_ADDR; | |
8f348ed5 | 2428 | pend = Z_ADDR; |
a9bcded1 KH |
2429 | stop = Z; |
2430 | } | |
177c0ea7 | 2431 | |
a3a303df KH |
2432 | if (ASCII_BYTE_P (*p)) |
2433 | p++, pos++; | |
8f924df7 | 2434 | else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) |
a9bcded1 KH |
2435 | p += bytes, pos += bytes; |
2436 | else | |
2437 | { | |
2438 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2439 | int c; |
a9bcded1 | 2440 | |
8f924df7 | 2441 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2442 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2443 | *p = tmp[0]; |
2444 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2445 | bytes--; | |
2446 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2447 | /* Now the gap is after the just inserted data. */ | |
2448 | pos = GPT; | |
2449 | p = GAP_END_ADDR; | |
2450 | if (pos <= begv) | |
2451 | begv += bytes; | |
2452 | if (pos <= zv) | |
2453 | zv += bytes; | |
2454 | if (pos <= pt) | |
2455 | pt += bytes; | |
31285a8f | 2456 | pend = Z_ADDR; |
a9bcded1 KH |
2457 | stop = Z; |
2458 | } | |
2459 | } | |
2460 | ||
2461 | if (pt != PT) | |
2462 | TEMP_SET_PT (pt); | |
2463 | ||
2464 | if (narrowed) | |
2465 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2466 | ||
3ac81adb RS |
2467 | /* Do this first, so that chars_in_text asks the right question. |
2468 | set_intervals_multibyte needs it too. */ | |
2469 | current_buffer->enable_multibyte_characters = Qt; | |
2470 | ||
b05525fa | 2471 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2472 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2473 | |
673c57d2 | 2474 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2475 | |
2476 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2477 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2478 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2479 | else |
2480 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2481 | |
2482 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2483 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2484 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2485 | else |
2486 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2487 | |
2488 | { | |
2489 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2490 | int pt; | |
2491 | ||
2492 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2493 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2494 | else |
2495 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2496 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2497 | } | |
3ac81adb RS |
2498 | |
2499 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2500 | |
2501 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2502 | getting confused by the markers that have not yet been updated. | |
2503 | It is also a signal that it should never create a marker. */ | |
65745fad | 2504 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2505 | |
65745fad | 2506 | for (; tail; tail = tail->next) |
3ac81adb | 2507 | { |
65745fad SM |
2508 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2509 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2510 | } |
b69f9797 RS |
2511 | |
2512 | /* Make sure no markers were put on the chain | |
2513 | while the chain value was incorrect. */ | |
65745fad | 2514 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2515 | abort (); |
2516 | ||
3ac81adb RS |
2517 | BUF_MARKERS (current_buffer) = markers; |
2518 | ||
2519 | /* Do this last, so it can calculate the new correspondences | |
2520 | between chars and bytes. */ | |
2521 | set_intervals_multibyte (1); | |
2522 | } | |
2523 | ||
38babc07 KS |
2524 | if (!EQ (old_undo, Qt)) |
2525 | { | |
2526 | /* Represent all the above changes by a special undo entry. */ | |
2527 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2528 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2529 | intern ("set-buffer-multibyte"), | |
2530 | NILP (flag) ? Qt : Qnil), | |
2531 | old_undo); | |
38babc07 KS |
2532 | } |
2533 | ||
2534 | UNGCPRO; | |
a9bcded1 | 2535 | |
724b203f GM |
2536 | /* Changing the multibyteness of a buffer means that all windows |
2537 | showing that buffer must be updated thoroughly. */ | |
2538 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2539 | ++windows_or_buffers_changed; | |
2540 | ||
abc9d959 RS |
2541 | /* Copy this buffer's new multibyte status |
2542 | into all of its indirect buffers. */ | |
2543 | for (other = all_buffers; other; other = other->next) | |
2544 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2545 | { |
2546 | other->enable_multibyte_characters | |
2547 | = current_buffer->enable_multibyte_characters; | |
2548 | other->prevent_redisplay_optimizations_p = 1; | |
2549 | } | |
abc9d959 | 2550 | |
ed00559d KH |
2551 | /* Restore the modifiedness of the buffer. */ |
2552 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2553 | Fset_buffer_modified_p (Qnil); | |
2554 | ||
2a2b50a9 | 2555 | #ifdef subprocesses |
172f9454 KH |
2556 | /* Update coding systems of this buffer's process (if any). */ |
2557 | { | |
2558 | Lisp_Object process; | |
2559 | ||
2560 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2561 | if (PROCESSP (process)) | |
2562 | setup_process_coding_systems (process); | |
2563 | } | |
2a2b50a9 | 2564 | #endif /* subprocesses */ |
172f9454 | 2565 | |
3ac81adb RS |
2566 | return flag; |
2567 | } | |
2568 | \f | |
1ab256cb | 2569 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2570 | 0, 0, 0, |
7ee72033 | 2571 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2572 | Most local variable bindings are eliminated so that the default values |
2573 | become effective once more. Also, the syntax table is set from | |
2574 | `standard-syntax-table', the local keymap is set to nil, | |
2575 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2576 | This function also forces redisplay of the mode line. | |
2577 | ||
2578 | Every function to select a new major mode starts by | |
2579 | calling this function. | |
2580 | ||
2581 | As a special exception, local variables whose names have | |
2582 | a non-nil `permanent-local' property are not eliminated by this function. | |
2583 | ||
2584 | The first thing this function does is run | |
7ee72033 MB |
2585 | the normal hook `change-major-mode-hook'. */) |
2586 | () | |
1ab256cb | 2587 | { |
fd186f07 | 2588 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2589 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2590 | |
3709505e | 2591 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2592 | remain swapped in, in their symbols. */ |
1ab256cb | 2593 | |
2f3f993b | 2594 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2595 | |
2596 | /* Actually eliminate all local bindings of this buffer. */ | |
2597 | ||
13de9290 | 2598 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2599 | |
1ab256cb RM |
2600 | /* Force mode-line redisplay. Useful here because all major mode |
2601 | commands call this function. */ | |
2602 | update_mode_lines++; | |
2603 | ||
2604 | return Qnil; | |
2605 | } | |
2f3f993b RS |
2606 | |
2607 | /* Make sure no local variables remain set up with buffer B | |
2608 | for their current values. */ | |
2609 | ||
2610 | static void | |
2611 | swap_out_buffer_local_variables (b) | |
2612 | struct buffer *b; | |
2613 | { | |
2614 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2615 | ||
2616 | XSETBUFFER (buffer, b); | |
2617 | oalist = b->local_var_alist; | |
2618 | ||
67ee9f6e | 2619 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2620 | { |
7539e11f | 2621 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2622 | |
2623 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2624 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
e7c10f83 | 2625 | if (EQ (tem, buffer)) |
2f3f993b | 2626 | { |
e7c10f83 SM |
2627 | /* Symbol is set up for this buffer's old local value: |
2628 | swap it out! */ | |
2629 | swap_in_global_binding (sym); | |
2f3f993b RS |
2630 | } |
2631 | } | |
2632 | } | |
1ab256cb | 2633 | \f |
2eec3b4e | 2634 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2635 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2636 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2637 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2638 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2639 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2640 | or where an overlay starts which ends at or after POS; |
624d2678 | 2641 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2642 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2643 | |
2644 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2645 | when this function is called. |
2646 | ||
2647 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2648 | If EXTEND is zero, we never extend the vector, | |
2649 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2650 | But we still return the total number of overlays. |
2651 | ||
2652 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2653 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2654 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2655 | |
2656 | int | |
ac869cf7 | 2657 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2658 | EMACS_INT pos; |
61d54cd5 | 2659 | int extend; |
2eec3b4e RS |
2660 | Lisp_Object **vec_ptr; |
2661 | int *len_ptr; | |
0f8b27ea SM |
2662 | EMACS_INT *next_ptr; |
2663 | EMACS_INT *prev_ptr; | |
ac869cf7 | 2664 | int change_req; |
1ab256cb | 2665 | { |
2410d73a SM |
2666 | Lisp_Object overlay, start, end; |
2667 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2668 | int idx = 0; |
2669 | int len = *len_ptr; | |
2670 | Lisp_Object *vec = *vec_ptr; | |
2671 | int next = ZV; | |
239c932b | 2672 | int prev = BEGV; |
61d54cd5 RS |
2673 | int inhibit_storing = 0; |
2674 | ||
2410d73a | 2675 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2676 | { |
239c932b | 2677 | int startpos, endpos; |
52f8ec73 | 2678 | |
2410d73a | 2679 | XSETMISC (overlay, tail); |
1ab256cb | 2680 | |
2eec3b4e RS |
2681 | start = OVERLAY_START (overlay); |
2682 | end = OVERLAY_END (overlay); | |
239c932b RS |
2683 | endpos = OVERLAY_POSITION (end); |
2684 | if (endpos < pos) | |
2685 | { | |
2686 | if (prev < endpos) | |
2687 | prev = endpos; | |
2688 | break; | |
2689 | } | |
413e06a4 RS |
2690 | startpos = OVERLAY_POSITION (start); |
2691 | /* This one ends at or after POS | |
daa1c109 | 2692 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2693 | if (prev < startpos && startpos < pos) |
2694 | prev = startpos; | |
239c932b RS |
2695 | if (endpos == pos) |
2696 | continue; | |
2eec3b4e RS |
2697 | if (startpos <= pos) |
2698 | { | |
2699 | if (idx == len) | |
2700 | { | |
61d54cd5 RS |
2701 | /* The supplied vector is full. |
2702 | Either make it bigger, or don't store any more in it. */ | |
2703 | if (extend) | |
2704 | { | |
0552666b GM |
2705 | /* Make it work with an initial len == 0. */ |
2706 | len *= 2; | |
2707 | if (len == 0) | |
2708 | len = 4; | |
2709 | *len_ptr = len; | |
61d54cd5 RS |
2710 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2711 | *vec_ptr = vec; | |
2712 | } | |
2713 | else | |
2714 | inhibit_storing = 1; | |
2eec3b4e | 2715 | } |
61d54cd5 RS |
2716 | |
2717 | if (!inhibit_storing) | |
2718 | vec[idx] = overlay; | |
2719 | /* Keep counting overlays even if we can't return them all. */ | |
2720 | idx++; | |
2eec3b4e RS |
2721 | } |
2722 | else if (startpos < next) | |
2723 | next = startpos; | |
2724 | } | |
2725 | ||
2410d73a | 2726 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2727 | { |
239c932b | 2728 | int startpos, endpos; |
52f8ec73 | 2729 | |
2410d73a | 2730 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2731 | |
2732 | start = OVERLAY_START (overlay); | |
2733 | end = OVERLAY_END (overlay); | |
2734 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2735 | if (pos < startpos) |
2eec3b4e RS |
2736 | { |
2737 | if (startpos < next) | |
2738 | next = startpos; | |
2739 | break; | |
2740 | } | |
239c932b RS |
2741 | endpos = OVERLAY_POSITION (end); |
2742 | if (pos < endpos) | |
2eec3b4e RS |
2743 | { |
2744 | if (idx == len) | |
2745 | { | |
61d54cd5 RS |
2746 | if (extend) |
2747 | { | |
4b0e44fc RS |
2748 | /* Make it work with an initial len == 0. */ |
2749 | len *= 2; | |
0552666b | 2750 | if (len == 0) |
4b0e44fc RS |
2751 | len = 4; |
2752 | *len_ptr = len; | |
61d54cd5 RS |
2753 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2754 | *vec_ptr = vec; | |
2755 | } | |
2756 | else | |
2757 | inhibit_storing = 1; | |
2eec3b4e | 2758 | } |
61d54cd5 RS |
2759 | |
2760 | if (!inhibit_storing) | |
2761 | vec[idx] = overlay; | |
2762 | idx++; | |
413e06a4 RS |
2763 | |
2764 | if (startpos < pos && startpos > prev) | |
2765 | prev = startpos; | |
2eec3b4e | 2766 | } |
239c932b RS |
2767 | else if (endpos < pos && endpos > prev) |
2768 | prev = endpos; | |
1d5f4c1d MB |
2769 | else if (endpos == pos && startpos > prev |
2770 | && (!change_req || startpos < pos)) | |
413e06a4 | 2771 | prev = startpos; |
1ab256cb RM |
2772 | } |
2773 | ||
239c932b RS |
2774 | if (next_ptr) |
2775 | *next_ptr = next; | |
2776 | if (prev_ptr) | |
2777 | *prev_ptr = prev; | |
2eec3b4e RS |
2778 | return idx; |
2779 | } | |
74514898 | 2780 | \f |
7723e095 MR |
2781 | /* Find all the overlays in the current buffer that overlap the range |
2782 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2783 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2784 | |
177c0ea7 | 2785 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2786 | Store in *LEN_PTR the size allocated for the vector. |
2787 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2788 | or ZV if there are no more overlays. | |
2789 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2790 | or BEGV if there are no previous overlays. | |
2791 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2792 | ||
2793 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2794 | when this function is called. | |
2795 | ||
2796 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2797 | If EXTEND is zero, we never extend the vector, | |
2798 | and we store only as many overlays as will fit. | |
2799 | But we still return the total number of overlays. */ | |
2800 | ||
a9b9a780 | 2801 | static int |
74514898 RS |
2802 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2803 | int beg, end; | |
2804 | int extend; | |
2805 | Lisp_Object **vec_ptr; | |
2806 | int *len_ptr; | |
2807 | int *next_ptr; | |
2808 | int *prev_ptr; | |
2809 | { | |
2410d73a SM |
2810 | Lisp_Object overlay, ostart, oend; |
2811 | struct Lisp_Overlay *tail; | |
74514898 RS |
2812 | int idx = 0; |
2813 | int len = *len_ptr; | |
2814 | Lisp_Object *vec = *vec_ptr; | |
2815 | int next = ZV; | |
2816 | int prev = BEGV; | |
2817 | int inhibit_storing = 0; | |
7723e095 | 2818 | int end_is_Z = end == Z; |
74514898 | 2819 | |
2410d73a | 2820 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2821 | { |
2822 | int startpos, endpos; | |
2823 | ||
2410d73a | 2824 | XSETMISC (overlay, tail); |
74514898 RS |
2825 | |
2826 | ostart = OVERLAY_START (overlay); | |
2827 | oend = OVERLAY_END (overlay); | |
2828 | endpos = OVERLAY_POSITION (oend); | |
2829 | if (endpos < beg) | |
2830 | { | |
2831 | if (prev < endpos) | |
2832 | prev = endpos; | |
2833 | break; | |
2834 | } | |
2835 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2836 | /* Count an interval if it overlaps the range, is empty at the |
2837 | start of the range, or is empty at END provided END denotes the | |
2838 | end of the buffer. */ | |
74514898 | 2839 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2840 | || (startpos == endpos |
2841 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2842 | { |
2843 | if (idx == len) | |
2844 | { | |
2845 | /* The supplied vector is full. | |
2846 | Either make it bigger, or don't store any more in it. */ | |
2847 | if (extend) | |
2848 | { | |
4b0e44fc RS |
2849 | /* Make it work with an initial len == 0. */ |
2850 | len *= 2; | |
2851 | if (len == 0) | |
2852 | len = 4; | |
2853 | *len_ptr = len; | |
74514898 RS |
2854 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2855 | *vec_ptr = vec; | |
2856 | } | |
2857 | else | |
2858 | inhibit_storing = 1; | |
2859 | } | |
2860 | ||
2861 | if (!inhibit_storing) | |
2862 | vec[idx] = overlay; | |
2863 | /* Keep counting overlays even if we can't return them all. */ | |
2864 | idx++; | |
2865 | } | |
2866 | else if (startpos < next) | |
2867 | next = startpos; | |
2868 | } | |
2869 | ||
2410d73a | 2870 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2871 | { |
2872 | int startpos, endpos; | |
2873 | ||
2410d73a | 2874 | XSETMISC (overlay, tail); |
74514898 RS |
2875 | |
2876 | ostart = OVERLAY_START (overlay); | |
2877 | oend = OVERLAY_END (overlay); | |
2878 | startpos = OVERLAY_POSITION (ostart); | |
2879 | if (end < startpos) | |
2880 | { | |
2881 | if (startpos < next) | |
2882 | next = startpos; | |
2883 | break; | |
2884 | } | |
2885 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2886 | /* Count an interval if it overlaps the range, is empty at the |
2887 | start of the range, or is empty at END provided END denotes the | |
2888 | end of the buffer. */ | |
74514898 | 2889 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2890 | || (startpos == endpos |
2891 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2892 | { |
2893 | if (idx == len) | |
2894 | { | |
2895 | if (extend) | |
2896 | { | |
4b0e44fc RS |
2897 | /* Make it work with an initial len == 0. */ |
2898 | len *= 2; | |
2899 | if (len == 0) | |
2900 | len = 4; | |
2901 | *len_ptr = len; | |
74514898 RS |
2902 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2903 | *vec_ptr = vec; | |
2904 | } | |
2905 | else | |
2906 | inhibit_storing = 1; | |
2907 | } | |
2908 | ||
2909 | if (!inhibit_storing) | |
2910 | vec[idx] = overlay; | |
2911 | idx++; | |
2912 | } | |
2913 | else if (endpos < beg && endpos > prev) | |
2914 | prev = endpos; | |
2915 | } | |
fc04fa47 | 2916 | |
74514898 RS |
2917 | if (next_ptr) |
2918 | *next_ptr = next; | |
2919 | if (prev_ptr) | |
2920 | *prev_ptr = prev; | |
2921 | return idx; | |
2922 | } | |
09a22085 GM |
2923 | |
2924 | ||
2925 | /* Return non-zero if there exists an overlay with a non-nil | |
2926 | `mouse-face' property overlapping OVERLAY. */ | |
2927 | ||
2928 | int | |
2929 | mouse_face_overlay_overlaps (overlay) | |
2930 | Lisp_Object overlay; | |
2931 | { | |
2932 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2933 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2934 | int n, i, size; |
09a22085 | 2935 | Lisp_Object *v, tem; |
177c0ea7 | 2936 | |
bfd8410f GM |
2937 | size = 10; |
2938 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2939 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2940 | if (n > size) | |
09a22085 | 2941 | { |
09a22085 GM |
2942 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2943 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2944 | } | |
2945 | ||
2946 | for (i = 0; i < n; ++i) | |
2947 | if (!EQ (v[i], overlay) | |
2948 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2949 | !NILP (tem))) | |
2950 | break; | |
2951 | ||
2952 | return i < n; | |
2953 | } | |
2954 | ||
2955 | ||
74514898 | 2956 | \f |
fc04fa47 KH |
2957 | /* Fast function to just test if we're at an overlay boundary. */ |
2958 | int | |
2959 | overlay_touches_p (pos) | |
2960 | int pos; | |
2961 | { | |
2410d73a SM |
2962 | Lisp_Object overlay; |
2963 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2964 | |
2410d73a | 2965 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2966 | { |
2967 | int endpos; | |
2968 | ||
2410d73a | 2969 | XSETMISC (overlay ,tail); |
8e50cc2d | 2970 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2971 | abort (); |
2972 | ||
2973 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2974 | if (endpos < pos) | |
2975 | break; | |
2976 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2977 | return 1; | |
2978 | } | |
2979 | ||
2410d73a | 2980 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2981 | { |
2982 | int startpos; | |
2983 | ||
2410d73a | 2984 | XSETMISC (overlay, tail); |
8e50cc2d | 2985 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2986 | abort (); |
2987 | ||
2988 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2989 | if (pos < startpos) | |
2990 | break; | |
2991 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2992 | return 1; | |
2993 | } | |
2994 | return 0; | |
2995 | } | |
2eec3b4e | 2996 | \f |
5985d248 KH |
2997 | struct sortvec |
2998 | { | |
2999 | Lisp_Object overlay; | |
3000 | int beg, end; | |
3001 | int priority; | |
3002 | }; | |
3003 | ||
3004 | static int | |
dfcf069d AS |
3005 | compare_overlays (v1, v2) |
3006 | const void *v1, *v2; | |
5985d248 | 3007 | { |
dfcf069d AS |
3008 | const struct sortvec *s1 = (const struct sortvec *) v1; |
3009 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
3010 | if (s1->priority != s2->priority) |
3011 | return s1->priority - s2->priority; | |
3012 | if (s1->beg != s2->beg) | |
3013 | return s1->beg - s2->beg; | |
3014 | if (s1->end != s2->end) | |
3015 | return s2->end - s1->end; | |
3016 | return 0; | |
3017 | } | |
3018 | ||
3019 | /* Sort an array of overlays by priority. The array is modified in place. | |
3020 | The return value is the new size; this may be smaller than the original | |
3021 | size if some of the overlays were invalid or were window-specific. */ | |
3022 | int | |
3023 | sort_overlays (overlay_vec, noverlays, w) | |
3024 | Lisp_Object *overlay_vec; | |
3025 | int noverlays; | |
3026 | struct window *w; | |
3027 | { | |
3028 | int i, j; | |
3029 | struct sortvec *sortvec; | |
3030 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
3031 | ||
3032 | /* Put the valid and relevant overlays into sortvec. */ | |
3033 | ||
3034 | for (i = 0, j = 0; i < noverlays; i++) | |
3035 | { | |
0fa767e7 | 3036 | Lisp_Object tem; |
c99fc30f | 3037 | Lisp_Object overlay; |
5985d248 | 3038 | |
c99fc30f | 3039 | overlay = overlay_vec[i]; |
5985d248 KH |
3040 | if (OVERLAY_VALID (overlay) |
3041 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
3042 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3043 | { | |
0fa767e7 KH |
3044 | /* If we're interested in a specific window, then ignore |
3045 | overlays that are limited to some other window. */ | |
3046 | if (w) | |
5985d248 | 3047 | { |
0fa767e7 KH |
3048 | Lisp_Object window; |
3049 | ||
3050 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 3051 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3052 | continue; |
5985d248 | 3053 | } |
0fa767e7 KH |
3054 | |
3055 | /* This overlay is good and counts: put it into sortvec. */ | |
3056 | sortvec[j].overlay = overlay; | |
3057 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3058 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3059 | tem = Foverlay_get (overlay, Qpriority); | |
3060 | if (INTEGERP (tem)) | |
3061 | sortvec[j].priority = XINT (tem); | |
3062 | else | |
3063 | sortvec[j].priority = 0; | |
3064 | j++; | |
5985d248 KH |
3065 | } |
3066 | } | |
3067 | noverlays = j; | |
3068 | ||
3069 | /* Sort the overlays into the proper order: increasing priority. */ | |
3070 | ||
3071 | if (noverlays > 1) | |
3072 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3073 | ||
3074 | for (i = 0; i < noverlays; i++) | |
3075 | overlay_vec[i] = sortvec[i].overlay; | |
3076 | return (noverlays); | |
3077 | } | |
3078 | \f | |
bbbe9545 KH |
3079 | struct sortstr |
3080 | { | |
cb26008f | 3081 | Lisp_Object string, string2; |
bbbe9545 KH |
3082 | int size; |
3083 | int priority; | |
3084 | }; | |
3085 | ||
e8185fa8 KH |
3086 | struct sortstrlist |
3087 | { | |
3088 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3089 | int size; /* Allocated length of that array. */ | |
3090 | int used; /* How much of the array is currently in use. */ | |
3091 | int bytes; /* Total length of the strings in buf. */ | |
3092 | }; | |
3093 | ||
3094 | /* Buffers for storing information about the overlays touching a given | |
3095 | position. These could be automatic variables in overlay_strings, but | |
3096 | it's more efficient to hold onto the memory instead of repeatedly | |
3097 | allocating and freeing it. */ | |
3098 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3099 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3100 | |
3101 | /* Allocated length of overlay_str_buf. */ | |
3102 | static int overlay_str_len; | |
3103 | ||
bbbe9545 KH |
3104 | /* A comparison function suitable for passing to qsort. */ |
3105 | static int | |
3106 | cmp_for_strings (as1, as2) | |
3107 | char *as1, *as2; | |
3108 | { | |
3109 | struct sortstr *s1 = (struct sortstr *)as1; | |
3110 | struct sortstr *s2 = (struct sortstr *)as2; | |
3111 | if (s1->size != s2->size) | |
3112 | return s2->size - s1->size; | |
3113 | if (s1->priority != s2->priority) | |
3114 | return s1->priority - s2->priority; | |
3115 | return 0; | |
3116 | } | |
3117 | ||
e8185fa8 | 3118 | static void |
cb26008f | 3119 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 3120 | struct sortstrlist *ssl; |
cb26008f | 3121 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
3122 | int size; |
3123 | { | |
43d27a72 RS |
3124 | int nbytes; |
3125 | ||
e8185fa8 KH |
3126 | if (ssl->used == ssl->size) |
3127 | { | |
3128 | if (ssl->buf) | |
3129 | ssl->size *= 2; | |
3130 | else | |
3131 | ssl->size = 5; | |
3132 | ssl->buf = ((struct sortstr *) | |
3133 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3134 | } | |
3135 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3136 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3137 | ssl->buf[ssl->used].size = size; |
3138 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3139 | ssl->used++; | |
43d27a72 RS |
3140 | |
3141 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3142 | nbytes = SCHARS (str); |
43d27a72 | 3143 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3144 | nbytes = count_size_as_multibyte (SDATA (str), |
3145 | SBYTES (str)); | |
43d27a72 | 3146 | else |
d5db4077 | 3147 | nbytes = SBYTES (str); |
43d27a72 RS |
3148 | |
3149 | ssl->bytes += nbytes; | |
3150 | ||
cb26008f | 3151 | if (STRINGP (str2)) |
43d27a72 RS |
3152 | { |
3153 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3154 | nbytes = SCHARS (str2); |
43d27a72 | 3155 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3156 | nbytes = count_size_as_multibyte (SDATA (str2), |
3157 | SBYTES (str2)); | |
43d27a72 | 3158 | else |
d5db4077 | 3159 | nbytes = SBYTES (str2); |
43d27a72 RS |
3160 | |
3161 | ssl->bytes += nbytes; | |
3162 | } | |
e8185fa8 | 3163 | } |
bbbe9545 KH |
3164 | |
3165 | /* Return the concatenation of the strings associated with overlays that | |
3166 | begin or end at POS, ignoring overlays that are specific to a window | |
3167 | other than W. The strings are concatenated in the appropriate order: | |
3168 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3169 | lower. Normally all of the after-strings come first, but zero-sized |
3170 | overlays have their after-strings ride along with the before-strings | |
3171 | because it would look strange to print them inside-out. | |
3172 | ||
3173 | Returns the string length, and stores the contents indirectly through | |
3174 | PSTR, if that variable is non-null. The string may be overwritten by | |
3175 | subsequent calls. */ | |
6b5d3b89 | 3176 | |
bbbe9545 KH |
3177 | int |
3178 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3179 | EMACS_INT pos; |
bbbe9545 | 3180 | struct window *w; |
6b5d3b89 | 3181 | unsigned char **pstr; |
bbbe9545 | 3182 | { |
2410d73a SM |
3183 | Lisp_Object overlay, window, str; |
3184 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3185 | int startpos, endpos; |
43d27a72 | 3186 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3187 | |
e8185fa8 KH |
3188 | overlay_heads.used = overlay_heads.bytes = 0; |
3189 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3190 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3191 | { |
2410d73a | 3192 | XSETMISC (overlay, ov); |
c2d5b10f | 3193 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3194 | |
3195 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3196 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3197 | if (endpos < pos) | |
3198 | break; | |
3199 | if (endpos != pos && startpos != pos) | |
3200 | continue; | |
3201 | window = Foverlay_get (overlay, Qwindow); | |
3202 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3203 | continue; | |
e8185fa8 KH |
3204 | if (startpos == pos |
3205 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3206 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3207 | (startpos == endpos |
3208 | ? Foverlay_get (overlay, Qafter_string) | |
3209 | : Qnil), | |
3210 | Foverlay_get (overlay, Qpriority), | |
3211 | endpos - startpos); | |
3212 | else if (endpos == pos | |
3213 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3214 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3215 | Foverlay_get (overlay, Qpriority), |
3216 | endpos - startpos); | |
bbbe9545 | 3217 | } |
2410d73a | 3218 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3219 | { |
2410d73a SM |
3220 | XSETMISC (overlay, ov); |
3221 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3222 | |
3223 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3224 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3225 | if (startpos > pos) | |
3226 | break; | |
e8185fa8 KH |
3227 | if (endpos != pos && startpos != pos) |
3228 | continue; | |
3229 | window = Foverlay_get (overlay, Qwindow); | |
3230 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3231 | continue; | |
e8185fa8 KH |
3232 | if (startpos == pos |
3233 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3234 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3235 | (startpos == endpos |
3236 | ? Foverlay_get (overlay, Qafter_string) | |
3237 | : Qnil), | |
3238 | Foverlay_get (overlay, Qpriority), | |
3239 | endpos - startpos); | |
3240 | else if (endpos == pos | |
3241 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3242 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3243 | Foverlay_get (overlay, Qpriority), |
3244 | endpos - startpos); | |
bbbe9545 | 3245 | } |
e8185fa8 KH |
3246 | if (overlay_tails.used > 1) |
3247 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3248 | cmp_for_strings); | |
3249 | if (overlay_heads.used > 1) | |
3250 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3251 | cmp_for_strings); | |
3252 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3253 | { |
e8185fa8 | 3254 | Lisp_Object tem; |
bbbe9545 | 3255 | int i; |
9f4d7cde | 3256 | unsigned char *p; |
e8185fa8 | 3257 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3258 | |
3259 | if (total > overlay_str_len) | |
9f4d7cde RS |
3260 | { |
3261 | overlay_str_len = total; | |
3262 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3263 | total); | |
3264 | } | |
bbbe9545 | 3265 | p = overlay_str_buf; |
e8185fa8 | 3266 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3267 | { |
43d27a72 | 3268 | int nbytes; |
e8185fa8 | 3269 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3270 | nbytes = copy_text (SDATA (tem), p, |
3271 | SBYTES (tem), | |
43d27a72 RS |
3272 | STRING_MULTIBYTE (tem), multibyte); |
3273 | p += nbytes; | |
bbbe9545 | 3274 | } |
e8185fa8 | 3275 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3276 | { |
43d27a72 | 3277 | int nbytes; |
e8185fa8 | 3278 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3279 | nbytes = copy_text (SDATA (tem), p, |
3280 | SBYTES (tem), | |
43d27a72 RS |
3281 | STRING_MULTIBYTE (tem), multibyte); |
3282 | p += nbytes; | |
cb26008f KH |
3283 | tem = overlay_heads.buf[i].string2; |
3284 | if (STRINGP (tem)) | |
3285 | { | |
d5db4077 KR |
3286 | nbytes = copy_text (SDATA (tem), p, |
3287 | SBYTES (tem), | |
43d27a72 RS |
3288 | STRING_MULTIBYTE (tem), multibyte); |
3289 | p += nbytes; | |
cb26008f | 3290 | } |
bbbe9545 | 3291 | } |
cb26008f KH |
3292 | if (p != overlay_str_buf + total) |
3293 | abort (); | |
bbbe9545 KH |
3294 | if (pstr) |
3295 | *pstr = overlay_str_buf; | |
e8185fa8 | 3296 | return total; |
bbbe9545 | 3297 | } |
e8185fa8 | 3298 | return 0; |
bbbe9545 KH |
3299 | } |
3300 | \f | |
5c4f68f1 | 3301 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3302 | |
2eec3b4e | 3303 | void |
5c4f68f1 JB |
3304 | recenter_overlay_lists (buf, pos) |
3305 | struct buffer *buf; | |
c2d5b10f | 3306 | EMACS_INT pos; |
2eec3b4e | 3307 | { |
2410d73a SM |
3308 | Lisp_Object overlay, beg, end; |
3309 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3310 | |
3311 | /* See if anything in overlays_before should move to overlays_after. */ | |
3312 | ||
3313 | /* We don't strictly need prev in this loop; it should always be nil. | |
3314 | But we use it for symmetry and in case that should cease to be true | |
3315 | with some future change. */ | |
2410d73a SM |
3316 | prev = NULL; |
3317 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3318 | { |
2410d73a SM |
3319 | next = tail->next; |
3320 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3321 | |
3322 | /* If the overlay is not valid, get rid of it. */ | |
3323 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3324 | #if 1 |
3325 | abort (); | |
3326 | #else | |
2eec3b4e RS |
3327 | { |
3328 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3329 | if (!NILP (prev)) | |
7539e11f | 3330 | XCDR (prev) = next; |
2eec3b4e | 3331 | else |
5c4f68f1 | 3332 | buf->overlays_before = next; |
2eec3b4e RS |
3333 | tail = prev; |
3334 | continue; | |
3335 | } | |
52f8ec73 | 3336 | #endif |
1ab256cb | 3337 | |
2eec3b4e RS |
3338 | beg = OVERLAY_START (overlay); |
3339 | end = OVERLAY_END (overlay); | |
1ab256cb | 3340 | |
2eec3b4e | 3341 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3342 | { |
2eec3b4e RS |
3343 | /* OVERLAY needs to be moved. */ |
3344 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3345 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3346 | |
3347 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3348 | if (prev) |
3349 | prev->next = next; | |
2eec3b4e | 3350 | else |
5c4f68f1 | 3351 | buf->overlays_before = next; |
2eec3b4e RS |
3352 | |
3353 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3354 | other_prev = NULL; |
3355 | for (other = buf->overlays_after; other; | |
3356 | other_prev = other, other = other->next) | |
1ab256cb | 3357 | { |
6af718a4 | 3358 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3359 | |
2410d73a SM |
3360 | XSETMISC (otheroverlay, other); |
3361 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3362 | |
3363 | otherbeg = OVERLAY_START (otheroverlay); | |
3364 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3365 | break; | |
1ab256cb | 3366 | } |
2eec3b4e RS |
3367 | |
3368 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3369 | tail->next = other; |
3370 | if (other_prev) | |
3371 | other_prev->next = tail; | |
1ab256cb | 3372 | else |
5c4f68f1 | 3373 | buf->overlays_after = tail; |
2eec3b4e | 3374 | tail = prev; |
1ab256cb | 3375 | } |
2eec3b4e RS |
3376 | else |
3377 | /* We've reached the things that should stay in overlays_before. | |
3378 | All the rest of overlays_before must end even earlier, | |
3379 | so stop now. */ | |
3380 | break; | |
3381 | } | |
3382 | ||
3383 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3384 | prev = NULL; |
3385 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3386 | { |
2410d73a SM |
3387 | next = tail->next; |
3388 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3389 | |
3390 | /* If the overlay is not valid, get rid of it. */ | |
3391 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3392 | #if 1 |
3393 | abort (); | |
3394 | #else | |
2eec3b4e RS |
3395 | { |
3396 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3397 | if (!NILP (prev)) | |
7539e11f | 3398 | XCDR (prev) = next; |
2eec3b4e | 3399 | else |
5c4f68f1 | 3400 | buf->overlays_after = next; |
2eec3b4e RS |
3401 | tail = prev; |
3402 | continue; | |
3403 | } | |
52f8ec73 | 3404 | #endif |
2eec3b4e RS |
3405 | |
3406 | beg = OVERLAY_START (overlay); | |
3407 | end = OVERLAY_END (overlay); | |
3408 | ||
3409 | /* Stop looking, when we know that nothing further | |
3410 | can possibly end before POS. */ | |
3411 | if (OVERLAY_POSITION (beg) > pos) | |
3412 | break; | |
3413 | ||
3414 | if (OVERLAY_POSITION (end) <= pos) | |
3415 | { | |
3416 | /* OVERLAY needs to be moved. */ | |
3417 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3418 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3419 | |
3420 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3421 | if (prev) |
3422 | prev->next = next; | |
2eec3b4e | 3423 | else |
5c4f68f1 | 3424 | buf->overlays_after = next; |
2eec3b4e RS |
3425 | |
3426 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3427 | other_prev = NULL; |
3428 | for (other = buf->overlays_before; other; | |
3429 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3430 | { |
3431 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3432 | |
2410d73a SM |
3433 | XSETMISC (otheroverlay, other); |
3434 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3435 | |
3436 | otherend = OVERLAY_END (otheroverlay); | |
3437 | if (OVERLAY_POSITION (otherend) <= where) | |
3438 | break; | |
3439 | } | |
3440 | ||
3441 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3442 | tail->next = other; |
3443 | if (other_prev) | |
3444 | other_prev->next = tail; | |
2eec3b4e | 3445 | else |
5c4f68f1 | 3446 | buf->overlays_before = tail; |
2eec3b4e RS |
3447 | tail = prev; |
3448 | } | |
3449 | } | |
3450 | ||
c2d5b10f | 3451 | buf->overlay_center = pos; |
2eec3b4e | 3452 | } |
2b1bdf65 | 3453 | |
423cdb46 KH |
3454 | void |
3455 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3456 | EMACS_INT pos; |
3457 | EMACS_INT length; | |
423cdb46 KH |
3458 | { |
3459 | /* After an insertion, the lists are still sorted properly, | |
3460 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3461 | if (current_buffer->overlay_center >= pos) |
3462 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3463 | } |
3464 | ||
3465 | void | |
3466 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3467 | EMACS_INT pos; |
3468 | EMACS_INT length; | |
423cdb46 | 3469 | { |
c2d5b10f | 3470 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3471 | /* The deletion was to our right. No change needed; the before- and |
3472 | after-lists are still consistent. */ | |
3473 | ; | |
c2d5b10f | 3474 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3475 | /* The deletion was to our left. We need to adjust the center value |
3476 | to account for the change in position, but the lists are consistent | |
3477 | given the new value. */ | |
c2d5b10f | 3478 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3479 | else |
3480 | /* We're right in the middle. There might be things on the after-list | |
3481 | that now belong on the before-list. Recentering will move them, | |
3482 | and also update the center point. */ | |
3483 | recenter_overlay_lists (current_buffer, pos); | |
3484 | } | |
3485 | ||
2b1bdf65 KH |
3486 | /* Fix up overlays that were garbled as a result of permuting markers |
3487 | in the range START through END. Any overlay with at least one | |
3488 | endpoint in this range will need to be unlinked from the overlay | |
3489 | list and reinserted in its proper place. | |
3490 | Such an overlay might even have negative size at this point. | |
6b61353c | 3491 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3492 | void |
6b61353c | 3493 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3494 | register int start, end; |
3495 | { | |
6af718a4 | 3496 | Lisp_Object overlay; |
2410d73a | 3497 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3498 | /* These are either nil, indicating that before_list or after_list |
3499 | should be assigned, or the cons cell the cdr of which should be | |
3500 | assigned. */ | |
2410d73a | 3501 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3502 | /* 'Parent', likewise, indicates a cons cell or |
3503 | current_buffer->overlays_before or overlays_after, depending | |
3504 | which loop we're in. */ | |
2410d73a | 3505 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3506 | int startpos, endpos; |
3507 | ||
3508 | /* This algorithm shifts links around instead of consing and GCing. | |
3509 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3510 | well-formed list except that its last element, the CDR of beforep |
3511 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3512 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3513 | that before_list isn't initialized, although it may look | |
3514 | strange. */ | |
2410d73a | 3515 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3516 | { |
2410d73a | 3517 | XSETMISC (overlay, tail); |
6b61353c | 3518 | |
2b1bdf65 | 3519 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3520 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3521 | ||
3522 | /* If the overlay is backwards, make it empty. */ | |
3523 | if (endpos < startpos) | |
3524 | { | |
3525 | startpos = endpos; | |
3526 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3527 | Qnil); | |
3528 | } | |
3529 | ||
2b1bdf65 KH |
3530 | if (endpos < start) |
3531 | break; | |
60ebfdf3 | 3532 | |
2b1bdf65 KH |
3533 | if (endpos < end |
3534 | || (startpos >= start && startpos < end)) | |
3535 | { | |
2b1bdf65 KH |
3536 | /* Add it to the end of the wrong list. Later on, |
3537 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3538 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3539 | { |
2410d73a | 3540 | if (!afterp) |
1138e742 KR |
3541 | after_list = tail; |
3542 | else | |
2410d73a | 3543 | afterp->next = tail; |
1138e742 | 3544 | afterp = tail; |
2b1bdf65 KH |
3545 | } |
3546 | else | |
3547 | { | |
2410d73a | 3548 | if (!beforep) |
1138e742 KR |
3549 | before_list = tail; |
3550 | else | |
2410d73a | 3551 | beforep->next = tail; |
1138e742 | 3552 | beforep = tail; |
2b1bdf65 | 3553 | } |
2410d73a SM |
3554 | if (!parent) |
3555 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3556 | else |
2410d73a SM |
3557 | parent->next = tail->next; |
3558 | tail = tail->next; | |
2b1bdf65 KH |
3559 | } |
3560 | else | |
2410d73a | 3561 | parent = tail, tail = parent->next; |
2b1bdf65 | 3562 | } |
2410d73a | 3563 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3564 | { |
2410d73a | 3565 | XSETMISC (overlay, tail); |
6b61353c | 3566 | |
2b1bdf65 | 3567 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3568 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3569 | ||
3570 | /* If the overlay is backwards, make it empty. */ | |
3571 | if (endpos < startpos) | |
3572 | { | |
3573 | startpos = endpos; | |
3574 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3575 | Qnil); |
6b61353c KH |
3576 | } |
3577 | ||
2b1bdf65 KH |
3578 | if (startpos >= end) |
3579 | break; | |
6b61353c | 3580 | |
2b1bdf65 KH |
3581 | if (startpos >= start |
3582 | || (endpos >= start && endpos < end)) | |
3583 | { | |
c2d5b10f | 3584 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3585 | { |
2410d73a | 3586 | if (!afterp) |
1138e742 KR |
3587 | after_list = tail; |
3588 | else | |
2410d73a | 3589 | afterp->next = tail; |
1138e742 | 3590 | afterp = tail; |
2b1bdf65 KH |
3591 | } |
3592 | else | |
3593 | { | |
2410d73a | 3594 | if (!beforep) |
1138e742 KR |
3595 | before_list = tail; |
3596 | else | |
2410d73a | 3597 | beforep->next = tail; |
1138e742 | 3598 | beforep = tail; |
2b1bdf65 | 3599 | } |
2410d73a SM |
3600 | if (!parent) |
3601 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3602 | else |
2410d73a SM |
3603 | parent->next = tail->next; |
3604 | tail = tail->next; | |
2b1bdf65 KH |
3605 | } |
3606 | else | |
2410d73a | 3607 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3608 | } |
3609 | ||
3610 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3611 | and let the recenter function make it sane again. */ | |
2410d73a | 3612 | if (beforep) |
1138e742 | 3613 | { |
2410d73a | 3614 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3615 | current_buffer->overlays_before = before_list; |
3616 | } | |
c2d5b10f | 3617 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3618 | |
2410d73a | 3619 | if (afterp) |
1138e742 | 3620 | { |
2410d73a | 3621 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3622 | current_buffer->overlays_after = after_list; |
3623 | } | |
c2d5b10f | 3624 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3625 | } |
3b06f880 KH |
3626 | |
3627 | /* We have two types of overlay: the one whose ending marker is | |
3628 | after-insertion-marker (this is the usual case) and the one whose | |
3629 | ending marker is before-insertion-marker. When `overlays_before' | |
3630 | contains overlays of the latter type and the former type in this | |
3631 | order and both overlays end at inserting position, inserting a text | |
3632 | increases only the ending marker of the latter type, which results | |
3633 | in incorrect ordering of `overlays_before'. | |
3634 | ||
3635 | This function fixes ordering of overlays in the slot | |
3636 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3637 | was at PREV, and now is at POS. */ | |
3638 | ||
01136e9b | 3639 | void |
3b06f880 KH |
3640 | fix_overlays_before (bp, prev, pos) |
3641 | struct buffer *bp; | |
c2d5b10f | 3642 | EMACS_INT prev, pos; |
3b06f880 | 3643 | { |
2410d73a SM |
3644 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3645 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3646 | Lisp_Object tem; | |
c2d5b10f | 3647 | EMACS_INT end; |
3b06f880 KH |
3648 | |
3649 | /* After the insertion, the several overlays may be in incorrect | |
3650 | order. The possibility is that, in the list `overlays_before', | |
3651 | an overlay which ends at POS appears after an overlay which ends | |
3652 | at PREV. Since POS is greater than PREV, we must fix the | |
3653 | ordering of these overlays, by moving overlays ends at POS before | |
3654 | the overlays ends at PREV. */ | |
3655 | ||
3656 | /* At first, find a place where disordered overlays should be linked | |
3657 | in. It is where an overlay which end before POS exists. (i.e. an | |
3658 | overlay whose ending marker is after-insertion-marker if disorder | |
3659 | exists). */ | |
2410d73a SM |
3660 | while (tail |
3661 | && (XSETMISC (tem, tail), | |
3662 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3663 | { |
3664 | parent = tail; | |
2410d73a | 3665 | tail = tail->next; |
1138e742 | 3666 | } |
3b06f880 KH |
3667 | |
3668 | /* If we don't find such an overlay, | |
3669 | or the found one ends before PREV, | |
3670 | or the found one is the last one in the list, | |
3671 | we don't have to fix anything. */ | |
f93ad4cf | 3672 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3673 | return; |
3674 | ||
1138e742 KR |
3675 | right_pair = parent; |
3676 | parent = tail; | |
2410d73a | 3677 | tail = tail->next; |
3b06f880 | 3678 | |
1138e742 | 3679 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3680 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3681 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3682 | we found an overlay which ends before PREV, the remaining | |
3683 | overlays are in correct order. */ | |
2410d73a | 3684 | while (tail) |
3b06f880 | 3685 | { |
2410d73a SM |
3686 | XSETMISC (tem, tail); |
3687 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3688 | |
3689 | if (end == pos) | |
3690 | { /* This overlay is disordered. */ | |
2410d73a | 3691 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3692 | |
3693 | /* Unlink the found overlay. */ | |
2410d73a SM |
3694 | tail = found->next; |
3695 | parent->next = tail; | |
1138e742 KR |
3696 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3697 | and link it into the right place. */ | |
2410d73a | 3698 | if (!right_pair) |
1138e742 | 3699 | { |
2410d73a | 3700 | found->next = bp->overlays_before; |
1138e742 KR |
3701 | bp->overlays_before = found; |
3702 | } | |
3703 | else | |
3704 | { | |
2410d73a SM |
3705 | found->next = right_pair->next; |
3706 | right_pair->next = found; | |
1138e742 | 3707 | } |
3b06f880 KH |
3708 | } |
3709 | else if (end == prev) | |
1138e742 KR |
3710 | { |
3711 | parent = tail; | |
2410d73a | 3712 | tail = tail->next; |
1138e742 | 3713 | } |
3b06f880 KH |
3714 | else /* No more disordered overlay. */ |
3715 | break; | |
3716 | } | |
3717 | } | |
2eec3b4e | 3718 | \f |
52f8ec73 | 3719 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3720 | doc: /* Return t if OBJECT is an overlay. */) |
3721 | (object) | |
52f8ec73 JB |
3722 | Lisp_Object object; |
3723 | { | |
3724 | return (OVERLAYP (object) ? Qt : Qnil); | |
3725 | } | |
3726 | ||
acac2700 | 3727 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3728 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3729 | If omitted, BUFFER defaults to the current buffer. |
3730 | BEG and END may be integers or markers. | |
a625ee20 RS |
3731 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3732 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3733 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3734 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3735 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3736 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3737 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3738 | Lisp_Object beg, end, buffer; |
acac2700 | 3739 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3740 | { |
3741 | Lisp_Object overlay; | |
5c4f68f1 | 3742 | struct buffer *b; |
2eec3b4e | 3743 | |
5c4f68f1 | 3744 | if (NILP (buffer)) |
67180c6a | 3745 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3746 | else |
b7826503 | 3747 | CHECK_BUFFER (buffer); |
883047b9 JB |
3748 | if (MARKERP (beg) |
3749 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3750 | error ("Marker points into wrong buffer"); | |
3751 | if (MARKERP (end) | |
3752 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3753 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3754 | |
b7826503 PJ |
3755 | CHECK_NUMBER_COERCE_MARKER (beg); |
3756 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3757 | |
883047b9 | 3758 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3759 | { |
c99fc30f KH |
3760 | Lisp_Object temp; |
3761 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3762 | } |
883047b9 JB |
3763 | |
3764 | b = XBUFFER (buffer); | |
3765 | ||
3766 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3767 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3768 | |
acac2700 RS |
3769 | if (!NILP (front_advance)) |
3770 | XMARKER (beg)->insertion_type = 1; | |
3771 | if (!NILP (rear_advance)) | |
3772 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3773 | |
48e2e3ba | 3774 | overlay = allocate_misc (); |
89ca3e1b | 3775 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3776 | XOVERLAY (overlay)->start = beg; |
3777 | XOVERLAY (overlay)->end = end; | |
3778 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3779 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3780 | |
177c0ea7 | 3781 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3782 | end = OVERLAY_END (overlay); |
c2d5b10f | 3783 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3784 | { |
3785 | if (b->overlays_after) | |
3786 | XOVERLAY (overlay)->next = b->overlays_after; | |
3787 | b->overlays_after = XOVERLAY (overlay); | |
3788 | } | |
2eec3b4e | 3789 | else |
2410d73a SM |
3790 | { |
3791 | if (b->overlays_before) | |
3792 | XOVERLAY (overlay)->next = b->overlays_before; | |
3793 | b->overlays_before = XOVERLAY (overlay); | |
3794 | } | |
2eec3b4e RS |
3795 | |
3796 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3797 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3798 | |
b61982dd JB |
3799 | /* We don't need to redisplay the region covered by the overlay, because |
3800 | the overlay has no properties at the moment. */ | |
3801 | ||
2eec3b4e RS |
3802 | return overlay; |
3803 | } | |
876aa27c RS |
3804 | \f |
3805 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3806 | ||
3807 | static void | |
3808 | modify_overlay (buf, start, end) | |
3809 | struct buffer *buf; | |
c2d5b10f | 3810 | EMACS_INT start, end; |
876aa27c | 3811 | { |
876aa27c RS |
3812 | if (start > end) |
3813 | { | |
3814 | int temp = start; | |
26f545d7 GM |
3815 | start = end; |
3816 | end = temp; | |
876aa27c RS |
3817 | } |
3818 | ||
481b5054 | 3819 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3820 | |
876aa27c RS |
3821 | /* If this is a buffer not in the selected window, |
3822 | we must do other windows. */ | |
3823 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3824 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3825 | /* If multiple windows show this buffer, we must do other windows. */ |
3826 | else if (buffer_shared > 1) | |
3827 | windows_or_buffers_changed = 1; | |
18700091 KS |
3828 | /* If we modify an overlay at the end of the buffer, we cannot |
3829 | be sure that window end is still valid. */ | |
3830 | else if (end >= ZV && start <= ZV) | |
3831 | windows_or_buffers_changed = 1; | |
876aa27c | 3832 | |
d8b9150f | 3833 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3834 | } |
2eec3b4e | 3835 | |
018ba359 | 3836 | \f |
2e34157c RS |
3837 | Lisp_Object Fdelete_overlay (); |
3838 | ||
2410d73a SM |
3839 | static struct Lisp_Overlay * |
3840 | unchain_overlay (list, overlay) | |
3841 | struct Lisp_Overlay *list, *overlay; | |
3842 | { | |
3843 | struct Lisp_Overlay *tmp, *prev; | |
3844 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3845 | if (tmp == overlay) | |
3846 | { | |
3847 | if (prev) | |
3848 | prev->next = tmp->next; | |
3849 | else | |
3850 | list = tmp->next; | |
3851 | overlay->next = NULL; | |
3852 | break; | |
3853 | } | |
3854 | return list; | |
3855 | } | |
3856 | ||
5c4f68f1 | 3857 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3858 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3859 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3860 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3861 | buffer. */) |
3862 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3863 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3864 | { |
0a4469c9 RS |
3865 | struct buffer *b, *ob; |
3866 | Lisp_Object obuffer; | |
aed13378 | 3867 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3868 | |
b7826503 | 3869 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3870 | if (NILP (buffer)) |
3871 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3872 | if (NILP (buffer)) |
67180c6a | 3873 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3874 | CHECK_BUFFER (buffer); |
883047b9 JB |
3875 | |
3876 | if (MARKERP (beg) | |
3877 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3878 | error ("Marker points into wrong buffer"); | |
3879 | if (MARKERP (end) | |
3880 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3881 | error ("Marker points into wrong buffer"); | |
3882 | ||
b7826503 PJ |
3883 | CHECK_NUMBER_COERCE_MARKER (beg); |
3884 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3885 | |
9d7608b7 KH |
3886 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3887 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3888 | |
b61982dd JB |
3889 | if (XINT (beg) > XINT (end)) |
3890 | { | |
c99fc30f KH |
3891 | Lisp_Object temp; |
3892 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3893 | } |
3894 | ||
9d7608b7 KH |
3895 | specbind (Qinhibit_quit, Qt); |
3896 | ||
0a4469c9 | 3897 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3898 | b = XBUFFER (buffer); |
8801a864 | 3899 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3900 | |
c82ed728 | 3901 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3902 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3903 | { |
3904 | /* Redisplay where the overlay was. */ | |
3905 | if (!NILP (obuffer)) | |
3906 | { | |
2e34157c RS |
3907 | int o_beg; |
3908 | int o_end; | |
50760c4a | 3909 | |
80509f2f RS |
3910 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3911 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3912 | |
2e34157c | 3913 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3914 | } |
3915 | ||
3916 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3917 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3918 | } |
c82ed728 JB |
3919 | else |
3920 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3921 | { | |
2e34157c | 3922 | int o_beg, o_end; |
c82ed728 | 3923 | |
80509f2f RS |
3924 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3925 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3926 | |
2e34157c RS |
3927 | if (o_beg == XINT (beg)) |
3928 | modify_overlay (b, o_end, XINT (end)); | |
3929 | else if (o_end == XINT (end)) | |
3930 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3931 | else |
3932 | { | |
2e34157c RS |
3933 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3934 | if (XINT (end) > o_end) o_end = XINT (end); | |
3935 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3936 | } |
3937 | } | |
b61982dd | 3938 | |
0a4469c9 RS |
3939 | if (!NILP (obuffer)) |
3940 | { | |
2410d73a SM |
3941 | ob->overlays_before |
3942 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3943 | ob->overlays_after | |
3944 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3945 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3946 | } |
5c4f68f1 JB |
3947 | |
3948 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3949 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3950 | |
177c0ea7 | 3951 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3952 | end = OVERLAY_END (overlay); |
c2d5b10f | 3953 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3954 | { |
8f924df7 KH |
3955 | XOVERLAY (overlay)->next = b->overlays_after; |
3956 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3957 | } |
2eec3b4e | 3958 | else |
2410d73a | 3959 | { |
8f924df7 KH |
3960 | XOVERLAY (overlay)->next = b->overlays_before; |
3961 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3962 | } |
2eec3b4e RS |
3963 | |
3964 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3965 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3966 | |
0a4469c9 | 3967 | return unbind_to (count, overlay); |
2eec3b4e RS |
3968 | } |
3969 | ||
3970 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3971 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3972 | (overlay) | |
5c4f68f1 | 3973 | Lisp_Object overlay; |
2eec3b4e | 3974 | { |
0a4469c9 | 3975 | Lisp_Object buffer; |
5c4f68f1 | 3976 | struct buffer *b; |
aed13378 | 3977 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3978 | |
b7826503 | 3979 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3980 | |
0a4469c9 RS |
3981 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3982 | if (NILP (buffer)) | |
3983 | return Qnil; | |
3984 | ||
3985 | b = XBUFFER (buffer); | |
0a4469c9 | 3986 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3987 | |
2410d73a SM |
3988 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3989 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3990 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3991 | modify_overlay (b, |
8231a9aa RS |
3992 | marker_position (OVERLAY_START (overlay)), |
3993 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3994 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3995 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3996 | ||
e58c389d | 3997 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3998 | display optimizations for the affected buffer, on the basis that |
3999 | these strings may contain newlines. This is easier to do than to | |
4000 | check for that situation during redisplay. */ | |
4001 | if (!windows_or_buffers_changed | |
4002 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
4003 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
4004 | b->prevent_redisplay_optimizations_p = 1; | |
4005 | ||
0a4469c9 | 4006 | return unbind_to (count, Qnil); |
2eec3b4e RS |
4007 | } |
4008 | \f | |
8ebafa8d JB |
4009 | /* Overlay dissection functions. */ |
4010 | ||
4011 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
4012 | doc: /* Return the position at which OVERLAY starts. */) |
4013 | (overlay) | |
8ebafa8d JB |
4014 | Lisp_Object overlay; |
4015 | { | |
b7826503 | 4016 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4017 | |
4018 | return (Fmarker_position (OVERLAY_START (overlay))); | |
4019 | } | |
4020 | ||
4021 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
4022 | doc: /* Return the position at which OVERLAY ends. */) |
4023 | (overlay) | |
8ebafa8d JB |
4024 | Lisp_Object overlay; |
4025 | { | |
b7826503 | 4026 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4027 | |
4028 | return (Fmarker_position (OVERLAY_END (overlay))); | |
4029 | } | |
4030 | ||
4031 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
4032 | doc: /* Return the buffer OVERLAY belongs to. |
4033 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 4034 | (overlay) |
8ebafa8d JB |
4035 | Lisp_Object overlay; |
4036 | { | |
b7826503 | 4037 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
4038 | |
4039 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
4040 | } | |
4041 | ||
4042 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 4043 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 4044 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
4045 | OVERLAY. */) |
4046 | (overlay) | |
8ebafa8d JB |
4047 | Lisp_Object overlay; |
4048 | { | |
b7826503 | 4049 | CHECK_OVERLAY (overlay); |
8ebafa8d | 4050 | |
48e2e3ba | 4051 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
4052 | } |
4053 | ||
4054 | \f | |
2eec3b4e | 4055 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 4056 | doc: /* Return a list of the overlays that contain the character at POS. */) |
7ee72033 | 4057 | (pos) |
2eec3b4e RS |
4058 | Lisp_Object pos; |
4059 | { | |
4060 | int noverlays; | |
2eec3b4e RS |
4061 | Lisp_Object *overlay_vec; |
4062 | int len; | |
4063 | Lisp_Object result; | |
4064 | ||
b7826503 | 4065 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4066 | |
4067 | len = 10; | |
a9800ae8 | 4068 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4069 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4070 | ||
4071 | /* Put all the overlays we want in a vector in overlay_vec. | |
4072 | Store the length in len. */ | |
2a77a7d7 | 4073 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4074 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
4075 | |
4076 | /* Make a list of them all. */ | |
4077 | result = Flist (noverlays, overlay_vec); | |
4078 | ||
9ac0d9e0 | 4079 | xfree (overlay_vec); |
2eec3b4e RS |
4080 | return result; |
4081 | } | |
4082 | ||
74514898 | 4083 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4084 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4085 | Overlap means that at least one character is contained within the overlay |
4086 | and also contained within the specified region. | |
7723e095 MR |
4087 | Empty overlays are included in the result if they are located at BEG, |
4088 | between BEG and END, or at END provided END denotes the position at the | |
4089 | end of the buffer. */) | |
7ee72033 | 4090 | (beg, end) |
74514898 RS |
4091 | Lisp_Object beg, end; |
4092 | { | |
4093 | int noverlays; | |
4094 | Lisp_Object *overlay_vec; | |
4095 | int len; | |
4096 | Lisp_Object result; | |
4097 | ||
b7826503 PJ |
4098 | CHECK_NUMBER_COERCE_MARKER (beg); |
4099 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4100 | |
4101 | len = 10; | |
4102 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4103 | ||
4104 | /* Put all the overlays we want in a vector in overlay_vec. | |
4105 | Store the length in len. */ | |
4106 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4107 | (int *) 0, (int *) 0); | |
4108 | ||
4109 | /* Make a list of them all. */ | |
4110 | result = Flist (noverlays, overlay_vec); | |
4111 | ||
4112 | xfree (overlay_vec); | |
4113 | return result; | |
4114 | } | |
4115 | ||
2eec3b4e | 4116 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4117 | 1, 1, 0, |
7ee72033 | 4118 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4119 | If there are no overlay boundaries from POS to (point-max), |
4120 | the value is (point-max). */) | |
7ee72033 | 4121 | (pos) |
2eec3b4e RS |
4122 | Lisp_Object pos; |
4123 | { | |
4124 | int noverlays; | |
0f8b27ea | 4125 | EMACS_INT endpos; |
2eec3b4e RS |
4126 | Lisp_Object *overlay_vec; |
4127 | int len; | |
2eec3b4e RS |
4128 | int i; |
4129 | ||
b7826503 | 4130 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4131 | |
4132 | len = 10; | |
4133 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4134 | ||
4135 | /* Put all the overlays we want in a vector in overlay_vec. | |
4136 | Store the length in len. | |
4137 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4138 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4139 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4140 | |
4141 | /* If any of these overlays ends before endpos, | |
4142 | use its ending point instead. */ | |
4143 | for (i = 0; i < noverlays; i++) | |
4144 | { | |
4145 | Lisp_Object oend; | |
0f8b27ea | 4146 | EMACS_INT oendpos; |
2eec3b4e RS |
4147 | |
4148 | oend = OVERLAY_END (overlay_vec[i]); | |
4149 | oendpos = OVERLAY_POSITION (oend); | |
4150 | if (oendpos < endpos) | |
4151 | endpos = oendpos; | |
1ab256cb RM |
4152 | } |
4153 | ||
9ac0d9e0 | 4154 | xfree (overlay_vec); |
2eec3b4e RS |
4155 | return make_number (endpos); |
4156 | } | |
239c932b RS |
4157 | |
4158 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4159 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4160 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4161 | If there are no overlay boundaries from (point-min) to POS, |
4162 | the value is (point-min). */) | |
7ee72033 | 4163 | (pos) |
239c932b RS |
4164 | Lisp_Object pos; |
4165 | { | |
4166 | int noverlays; | |
0f8b27ea | 4167 | EMACS_INT prevpos; |
239c932b RS |
4168 | Lisp_Object *overlay_vec; |
4169 | int len; | |
239c932b | 4170 | |
b7826503 | 4171 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4172 | |
624bbdc4 RS |
4173 | /* At beginning of buffer, we know the answer; |
4174 | avoid bug subtracting 1 below. */ | |
4175 | if (XINT (pos) == BEGV) | |
4176 | return pos; | |
4177 | ||
017f0539 GM |
4178 | len = 10; |
4179 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4180 | ||
239c932b RS |
4181 | /* Put all the overlays we want in a vector in overlay_vec. |
4182 | Store the length in len. | |
daa1c109 | 4183 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4184 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4185 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4186 | |
239c932b RS |
4187 | xfree (overlay_vec); |
4188 | return make_number (prevpos); | |
4189 | } | |
2eec3b4e RS |
4190 | \f |
4191 | /* These functions are for debugging overlays. */ | |
4192 | ||
4193 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4194 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4195 | The car has all the overlays before the overlay center; |
4196 | the cdr has all the overlays after the overlay center. | |
4197 | Recentering overlays moves overlays between these lists. | |
4198 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4199 | However, the overlays you get are the real objects that the buffer uses. */) |
4200 | () | |
2eec3b4e | 4201 | { |
2410d73a SM |
4202 | struct Lisp_Overlay *ol; |
4203 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4204 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4205 | { | |
4206 | XSETMISC (tmp, ol); | |
4207 | before = Fcons (tmp, before); | |
4208 | } | |
4209 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4210 | { | |
4211 | XSETMISC (tmp, ol); | |
4212 | after = Fcons (tmp, after); | |
4213 | } | |
4214 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4215 | } |
4216 | ||
4217 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4218 | doc: /* Recenter the overlays of the current buffer around position POS. |
4219 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4220 | for positions far away from POS). */) | |
7ee72033 | 4221 | (pos) |
2eec3b4e RS |
4222 | Lisp_Object pos; |
4223 | { | |
b7826503 | 4224 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4225 | |
5c4f68f1 | 4226 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4227 | return Qnil; |
4228 | } | |
4229 | \f | |
4230 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4231 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4232 | (overlay, prop) | |
2eec3b4e RS |
4233 | Lisp_Object overlay, prop; |
4234 | { | |
b7826503 | 4235 | CHECK_OVERLAY (overlay); |
9a593927 | 4236 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4237 | } |
4238 | ||
4239 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4240 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4241 | (overlay, prop, value) | |
2eec3b4e RS |
4242 | Lisp_Object overlay, prop, value; |
4243 | { | |
48e2e3ba | 4244 | Lisp_Object tail, buffer; |
9d7608b7 | 4245 | int changed; |
2eec3b4e | 4246 | |
b7826503 | 4247 | CHECK_OVERLAY (overlay); |
b61982dd | 4248 | |
274a9425 RS |
4249 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4250 | ||
48e2e3ba | 4251 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4252 | CONSP (tail) && CONSP (XCDR (tail)); |
4253 | tail = XCDR (XCDR (tail))) | |
4254 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4255 | { |
7539e11f | 4256 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4257 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4258 | goto found; |
274a9425 | 4259 | } |
9d7608b7 KH |
4260 | /* It wasn't in the list, so add it to the front. */ |
4261 | changed = !NILP (value); | |
48e2e3ba KH |
4262 | XOVERLAY (overlay)->plist |
4263 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4264 | found: |
4265 | if (! NILP (buffer)) | |
4266 | { | |
4267 | if (changed) | |
876aa27c | 4268 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4269 | marker_position (OVERLAY_START (overlay)), |
4270 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4271 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4272 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4273 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4274 | Fdelete_overlay (overlay); | |
4275 | } | |
7d63db98 | 4276 | |
2eec3b4e | 4277 | return value; |
1ab256cb RM |
4278 | } |
4279 | \f | |
9115729e KH |
4280 | /* Subroutine of report_overlay_modification. */ |
4281 | ||
4282 | /* Lisp vector holding overlay hook functions to call. | |
4283 | Vector elements come in pairs. | |
4284 | Each even-index element is a list of hook functions. | |
4285 | The following odd-index element is the overlay they came from. | |
4286 | ||
4287 | Before the buffer change, we fill in this vector | |
4288 | as we call overlay hook functions. | |
4289 | After the buffer change, we get the functions to call from this vector. | |
4290 | This way we always call the same functions before and after the change. */ | |
4291 | static Lisp_Object last_overlay_modification_hooks; | |
4292 | ||
4293 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4294 | static int last_overlay_modification_hooks_used; | |
4295 | ||
4296 | /* Add one functionlist/overlay pair | |
4297 | to the end of last_overlay_modification_hooks. */ | |
4298 | ||
4299 | static void | |
4300 | add_overlay_mod_hooklist (functionlist, overlay) | |
4301 | Lisp_Object functionlist, overlay; | |
4302 | { | |
4303 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4304 | ||
4305 | if (last_overlay_modification_hooks_used == oldsize) | |
de0280a2 EZ |
4306 | last_overlay_modification_hooks = larger_vector |
4307 | (last_overlay_modification_hooks, oldsize * 2, Qnil); | |
3ae565b3 SM |
4308 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4309 | functionlist); last_overlay_modification_hooks_used++; | |
4310 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4311 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4312 | } |
4313 | \f | |
173f2a64 RS |
4314 | /* Run the modification-hooks of overlays that include |
4315 | any part of the text in START to END. | |
9115729e KH |
4316 | If this change is an insertion, also |
4317 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4318 | and the insert-after-hooks of overlay ending at START. |
4319 | ||
4320 | This is called both before and after the modification. | |
4321 | AFTER is nonzero when we call after the modification. | |
4322 | ||
9115729e KH |
4323 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4324 | When AFTER is nonzero, they are the start position, | |
4325 | the position after the inserted new text, | |
4326 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4327 | |
4328 | void | |
930a9140 | 4329 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4330 | Lisp_Object start, end; |
930a9140 RS |
4331 | int after; |
4332 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4333 | { |
2410d73a SM |
4334 | Lisp_Object prop, overlay; |
4335 | struct Lisp_Overlay *tail; | |
9115729e KH |
4336 | /* 1 if this change is an insertion. */ |
4337 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4338 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4339 | |
4340 | overlay = Qnil; | |
2410d73a | 4341 | tail = NULL; |
9115729e | 4342 | |
27c6b98e SM |
4343 | /* We used to run the functions as soon as we found them and only register |
4344 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4345 | case. But running elisp code as we traverse the list of overlays is | |
4346 | painful because the list can be modified by the elisp code so we had to | |
4347 | copy at several places. We now simply do a read-only traversal that | |
4348 | only collects the functions to run and we run them afterwards. It's | |
4349 | simpler, especially since all the code was already there. -stef */ | |
4350 | ||
a615c6dc | 4351 | if (!after) |
173f2a64 | 4352 | { |
a615c6dc SM |
4353 | /* We are being called before a change. |
4354 | Scan the overlays to find the functions to call. */ | |
4355 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4356 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4357 | { |
a615c6dc SM |
4358 | int startpos, endpos; |
4359 | Lisp_Object ostart, oend; | |
4360 | ||
2410d73a | 4361 | XSETMISC (overlay, tail); |
a615c6dc SM |
4362 | |
4363 | ostart = OVERLAY_START (overlay); | |
4364 | oend = OVERLAY_END (overlay); | |
4365 | endpos = OVERLAY_POSITION (oend); | |
4366 | if (XFASTINT (start) > endpos) | |
4367 | break; | |
4368 | startpos = OVERLAY_POSITION (ostart); | |
4369 | if (insertion && (XFASTINT (start) == startpos | |
4370 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4371 | { |
a615c6dc SM |
4372 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4373 | if (!NILP (prop)) | |
4374 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4375 | } |
a615c6dc SM |
4376 | if (insertion && (XFASTINT (start) == endpos |
4377 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4378 | { |
a615c6dc SM |
4379 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4380 | if (!NILP (prop)) | |
4381 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4382 | } |
a615c6dc SM |
4383 | /* Test for intersecting intervals. This does the right thing |
4384 | for both insertion and deletion. */ | |
4385 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4386 | { |
a615c6dc SM |
4387 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4388 | if (!NILP (prop)) | |
4389 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4390 | } |
173f2a64 | 4391 | } |
60ebfdf3 | 4392 | |
2410d73a | 4393 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4394 | { |
a615c6dc SM |
4395 | int startpos, endpos; |
4396 | Lisp_Object ostart, oend; | |
4397 | ||
2410d73a | 4398 | XSETMISC (overlay, tail); |
a615c6dc SM |
4399 | |
4400 | ostart = OVERLAY_START (overlay); | |
4401 | oend = OVERLAY_END (overlay); | |
4402 | startpos = OVERLAY_POSITION (ostart); | |
4403 | endpos = OVERLAY_POSITION (oend); | |
4404 | if (XFASTINT (end) < startpos) | |
4405 | break; | |
4406 | if (insertion && (XFASTINT (start) == startpos | |
4407 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4408 | { |
a615c6dc SM |
4409 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4410 | if (!NILP (prop)) | |
4411 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4412 | } |
a615c6dc SM |
4413 | if (insertion && (XFASTINT (start) == endpos |
4414 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4415 | { |
a615c6dc SM |
4416 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4417 | if (!NILP (prop)) | |
4418 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4419 | } |
a615c6dc SM |
4420 | /* Test for intersecting intervals. This does the right thing |
4421 | for both insertion and deletion. */ | |
4422 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4423 | { |
a615c6dc SM |
4424 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4425 | if (!NILP (prop)) | |
4426 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4427 | } |
173f2a64 RS |
4428 | } |
4429 | } | |
55b48893 | 4430 | |
a615c6dc SM |
4431 | GCPRO4 (overlay, arg1, arg2, arg3); |
4432 | { | |
4433 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4434 | First copy the vector contents, in case some of these hooks | |
4435 | do subsequent modification of the buffer. */ | |
4436 | int size = last_overlay_modification_hooks_used; | |
4437 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4438 | int i; | |
4439 | ||
4440 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4441 | copy, size * sizeof (Lisp_Object)); | |
4442 | gcpro1.var = copy; | |
4443 | gcpro1.nvars = size; | |
4444 | ||
4445 | for (i = 0; i < size;) | |
4446 | { | |
4447 | Lisp_Object prop, overlay; | |
4448 | prop = copy[i++]; | |
4449 | overlay = copy[i++]; | |
4450 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4451 | } | |
4452 | } | |
55b48893 | 4453 | UNGCPRO; |
173f2a64 RS |
4454 | } |
4455 | ||
4456 | static void | |
930a9140 RS |
4457 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4458 | Lisp_Object list, overlay; | |
4459 | int after; | |
4460 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4461 | { |
930a9140 | 4462 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4463 | |
930a9140 | 4464 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4465 | |
6d70a280 | 4466 | while (CONSP (list)) |
173f2a64 | 4467 | { |
930a9140 | 4468 | if (NILP (arg3)) |
6d70a280 | 4469 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4470 | else |
6d70a280 SM |
4471 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4472 | list = XCDR (list); | |
173f2a64 RS |
4473 | } |
4474 | UNGCPRO; | |
4475 | } | |
9d7608b7 KH |
4476 | |
4477 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4478 | property is set. */ | |
4479 | void | |
4480 | evaporate_overlays (pos) | |
c2d5b10f | 4481 | EMACS_INT pos; |
9d7608b7 | 4482 | { |
2410d73a SM |
4483 | Lisp_Object overlay, hit_list; |
4484 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4485 | |
4486 | hit_list = Qnil; | |
c2d5b10f | 4487 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4488 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4489 | { |
4490 | int endpos; | |
2410d73a | 4491 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4492 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4493 | if (endpos < pos) | |
4494 | break; | |
4495 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4496 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4497 | hit_list = Fcons (overlay, hit_list); |
4498 | } | |
4499 | else | |
2410d73a | 4500 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4501 | { |
4502 | int startpos; | |
2410d73a | 4503 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4504 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4505 | if (startpos > pos) | |
4506 | break; | |
4507 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4508 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4509 | hit_list = Fcons (overlay, hit_list); |
4510 | } | |
7539e11f KR |
4511 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4512 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4513 | } |
173f2a64 | 4514 | \f |
54dfdeb0 | 4515 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4516 | in the slot with offset OFFSET. */ |
4517 | ||
0fa3ba92 | 4518 | void |
ad97b375 SM |
4519 | buffer_slot_type_mismatch (newval, type) |
4520 | Lisp_Object newval; | |
64e16c3c | 4521 | int type; |
0fa3ba92 | 4522 | { |
ad97b375 | 4523 | Lisp_Object predicate; |
177c0ea7 | 4524 | |
64e16c3c | 4525 | switch (type) |
0fa3ba92 | 4526 | { |
ad97b375 SM |
4527 | case Lisp_Int: predicate = Qintegerp; break; |
4528 | case Lisp_String: predicate = Qstringp; break; | |
4529 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4530 | default: abort (); | |
0fa3ba92 JB |
4531 | } |
4532 | ||
ad97b375 | 4533 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4534 | } |
7c02e886 | 4535 | |
0fa3ba92 | 4536 | \f |
b86af064 GM |
4537 | /*********************************************************************** |
4538 | Allocation with mmap | |
4539 | ***********************************************************************/ | |
4540 | ||
4541 | #ifdef USE_MMAP_FOR_BUFFERS | |
4542 | ||
4543 | #include <sys/types.h> | |
4544 | #include <sys/mman.h> | |
4545 | ||
4546 | #ifndef MAP_ANON | |
4547 | #ifdef MAP_ANONYMOUS | |
4548 | #define MAP_ANON MAP_ANONYMOUS | |
4549 | #else | |
4550 | #define MAP_ANON 0 | |
4551 | #endif | |
4552 | #endif | |
4553 | ||
09dfdf85 GM |
4554 | #ifndef MAP_FAILED |
4555 | #define MAP_FAILED ((void *) -1) | |
4556 | #endif | |
4557 | ||
b86af064 GM |
4558 | #include <stdio.h> |
4559 | #include <errno.h> | |
4560 | ||
4561 | #if MAP_ANON == 0 | |
4562 | #include <fcntl.h> | |
4563 | #endif | |
4564 | ||
4565 | #include "coding.h" | |
4566 | ||
4567 | ||
4568 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4569 | The current implementation lets the system select mapped | |
4570 | addresses; we're not using MAP_FIXED in general, except when | |
4571 | trying to enlarge regions. | |
4572 | ||
4573 | Each mapped region starts with a mmap_region structure, the user | |
4574 | area starts after that structure, aligned to MEM_ALIGN. | |
4575 | ||
4576 | +-----------------------+ | |
4577 | | struct mmap_info + | | |
4578 | | padding | | |
4579 | +-----------------------+ | |
4580 | | user data | | |
4581 | | | | |
4582 | | | | |
4583 | +-----------------------+ */ | |
4584 | ||
4585 | struct mmap_region | |
4586 | { | |
4587 | /* User-specified size. */ | |
4588 | size_t nbytes_specified; | |
177c0ea7 | 4589 | |
b86af064 GM |
4590 | /* Number of bytes mapped */ |
4591 | size_t nbytes_mapped; | |
4592 | ||
4593 | /* Pointer to the location holding the address of the memory | |
4594 | allocated with the mmap'd block. The variable actually points | |
4595 | after this structure. */ | |
4596 | POINTER_TYPE **var; | |
4597 | ||
4598 | /* Next and previous in list of all mmap'd regions. */ | |
4599 | struct mmap_region *next, *prev; | |
4600 | }; | |
4601 | ||
4602 | /* Doubly-linked list of mmap'd regions. */ | |
4603 | ||
4604 | static struct mmap_region *mmap_regions; | |
4605 | ||
4606 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4607 | /dev/zero will be opened on it. */ | |
4608 | ||
4609 | static int mmap_fd; | |
4610 | ||
4611 | /* Temporary storage for mmap_set_vars, see there. */ | |
4612 | ||
4613 | static struct mmap_region *mmap_regions_1; | |
4614 | static int mmap_fd_1; | |
4615 | ||
4616 | /* Page size on this system. */ | |
4617 | ||
4618 | static int mmap_page_size; | |
4619 | ||
4620 | /* 1 means mmap has been intialized. */ | |
4621 | ||
4622 | static int mmap_initialized_p; | |
4623 | ||
4624 | /* Value is X rounded up to the next multiple of N. */ | |
4625 | ||
4626 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4627 | ||
4628 | /* Size of mmap_region structure plus padding. */ | |
4629 | ||
4630 | #define MMAP_REGION_STRUCT_SIZE \ | |
4631 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4632 | ||
4633 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4634 | region, return a pointer to the start of the region. */ | |
4635 | ||
4636 | #define MMAP_REGION(P) \ | |
4637 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4638 | ||
4639 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4640 | to the start of the user-visible part of the region. */ | |
4641 | ||
4642 | #define MMAP_USER_AREA(P) \ | |
4643 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4644 | ||
4645 | #define MEM_ALIGN sizeof (double) | |
4646 | ||
7273faa1 DL |
4647 | /* Predicate returning true if part of the address range [START .. END] |
4648 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4649 | memory mapping. |
4650 | ||
4651 | Default is to conservativly assume the address range is occupied by | |
4652 | something else. This can be overridden by system configuration | |
4653 | files if system-specific means to determine this exists. */ | |
4654 | ||
4655 | #ifndef MMAP_ALLOCATED_P | |
4656 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4657 | #endif | |
4658 | ||
b86af064 GM |
4659 | /* Function prototypes. */ |
4660 | ||
4661 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4662 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4663 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4664 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4665 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4666 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4667 | static void mmap_init P_ ((void)); | |
4668 | ||
4669 | ||
4670 | /* Return a region overlapping address range START...END, or null if | |
4671 | none. END is not including, i.e. the last byte in the range | |
4672 | is at END - 1. */ | |
4673 | ||
4674 | static struct mmap_region * | |
4675 | mmap_find (start, end) | |
4676 | POINTER_TYPE *start, *end; | |
4677 | { | |
4678 | struct mmap_region *r; | |
4679 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4680 | |
b86af064 GM |
4681 | for (r = mmap_regions; r; r = r->next) |
4682 | { | |
4683 | char *rstart = (char *) r; | |
4684 | char *rend = rstart + r->nbytes_mapped; | |
4685 | ||
4686 | if (/* First byte of range, i.e. START, in this region? */ | |
4687 | (s >= rstart && s < rend) | |
4688 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4689 | || (e > rstart && e <= rend) | |
4690 | /* First byte of this region in the range? */ | |
4691 | || (rstart >= s && rstart < e) | |
4692 | /* Last byte of this region in the range? */ | |
4693 | || (rend > s && rend <= e)) | |
4694 | break; | |
4695 | } | |
4696 | ||
4697 | return r; | |
4698 | } | |
4699 | ||
4700 | ||
4701 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4702 | the region. Value is non-zero if successful. */ | |
4703 | ||
4704 | static int | |
4705 | mmap_free_1 (r) | |
4706 | struct mmap_region *r; | |
4707 | { | |
4708 | if (r->next) | |
4709 | r->next->prev = r->prev; | |
4710 | if (r->prev) | |
4711 | r->prev->next = r->next; | |
4712 | else | |
4713 | mmap_regions = r->next; | |
177c0ea7 | 4714 | |
1a15cca0 | 4715 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4716 | { |
4717 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4718 | return 0; | |
4719 | } | |
4720 | ||
4721 | return 1; | |
4722 | } | |
4723 | ||
4724 | ||
4725 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4726 | Value is non-zero if successful. */ | |
4727 | ||
4728 | static int | |
4729 | mmap_enlarge (r, npages) | |
4730 | struct mmap_region *r; | |
4731 | int npages; | |
4732 | { | |
4733 | char *region_end = (char *) r + r->nbytes_mapped; | |
4734 | size_t nbytes; | |
4735 | int success = 0; | |
4736 | ||
4737 | if (npages < 0) | |
4738 | { | |
4739 | /* Unmap pages at the end of the region. */ | |
4740 | nbytes = - npages * mmap_page_size; | |
4741 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4742 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4743 | else | |
4744 | { | |
4745 | r->nbytes_mapped -= nbytes; | |
4746 | success = 1; | |
4747 | } | |
4748 | } | |
4749 | else if (npages > 0) | |
4750 | { | |
b86af064 | 4751 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4752 | |
b86af064 GM |
4753 | /* Try to map additional pages at the end of the region. We |
4754 | cannot do this if the address range is already occupied by | |
4755 | something else because mmap deletes any previous mapping. | |
4756 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4757 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4758 | { |
4759 | POINTER_TYPE *p; | |
177c0ea7 | 4760 | |
b86af064 GM |
4761 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4762 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4763 | if (p == MAP_FAILED) | |
edaa9aed | 4764 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4765 | else if (p != (POINTER_TYPE *) region_end) |
4766 | { | |
4767 | /* Kernels are free to choose a different address. In | |
4768 | that case, unmap what we've mapped above; we have | |
4769 | no use for it. */ | |
4770 | if (munmap (p, nbytes) == -1) | |
4771 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4772 | } | |
4773 | else | |
4774 | { | |
4775 | r->nbytes_mapped += nbytes; | |
4776 | success = 1; | |
4777 | } | |
4778 | } | |
4779 | } | |
4780 | ||
4781 | return success; | |
4782 | } | |
4783 | ||
4784 | ||
4785 | /* Set or reset variables holding references to mapped regions. If | |
4786 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4787 | non-zero, set all variables to the start of the user-areas | |
4788 | of mapped regions. | |
4789 | ||
4790 | This function is called from Fdump_emacs to ensure that the dumped | |
4791 | Emacs doesn't contain references to memory that won't be mapped | |
4792 | when Emacs starts. */ | |
4793 | ||
4794 | void | |
4795 | mmap_set_vars (restore_p) | |
4796 | int restore_p; | |
4797 | { | |
4798 | struct mmap_region *r; | |
4799 | ||
4800 | if (restore_p) | |
4801 | { | |
4802 | mmap_regions = mmap_regions_1; | |
4803 | mmap_fd = mmap_fd_1; | |
4804 | for (r = mmap_regions; r; r = r->next) | |
4805 | *r->var = MMAP_USER_AREA (r); | |
4806 | } | |
4807 | else | |
4808 | { | |
4809 | for (r = mmap_regions; r; r = r->next) | |
4810 | *r->var = NULL; | |
4811 | mmap_regions_1 = mmap_regions; | |
4812 | mmap_regions = NULL; | |
4813 | mmap_fd_1 = mmap_fd; | |
4814 | mmap_fd = -1; | |
4815 | } | |
4816 | } | |
4817 | ||
4818 | ||
4819 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4820 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4821 | address of some variable which will use the data area. | |
4822 | ||
4823 | The allocation of 0 bytes is valid. | |
4824 | ||
4825 | If we can't allocate the necessary memory, set *VAR to null, and | |
4826 | return null. */ | |
4827 | ||
4828 | static POINTER_TYPE * | |
4829 | mmap_alloc (var, nbytes) | |
4830 | POINTER_TYPE **var; | |
4831 | size_t nbytes; | |
4832 | { | |
4833 | void *p; | |
4834 | size_t map; | |
4835 | ||
4836 | mmap_init (); | |
4837 | ||
4838 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4839 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4840 | mmap_fd, 0); | |
177c0ea7 | 4841 | |
b86af064 GM |
4842 | if (p == MAP_FAILED) |
4843 | { | |
4844 | if (errno != ENOMEM) | |
4845 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4846 | p = NULL; | |
4847 | } | |
4848 | else | |
4849 | { | |
4850 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4851 | |
b86af064 GM |
4852 | r->nbytes_specified = nbytes; |
4853 | r->nbytes_mapped = map; | |
4854 | r->var = var; | |
4855 | r->prev = NULL; | |
4856 | r->next = mmap_regions; | |
4857 | if (r->next) | |
4858 | r->next->prev = r; | |
4859 | mmap_regions = r; | |
177c0ea7 | 4860 | |
b86af064 GM |
4861 | p = MMAP_USER_AREA (p); |
4862 | } | |
177c0ea7 | 4863 | |
b86af064 GM |
4864 | return *var = p; |
4865 | } | |
4866 | ||
4867 | ||
4868 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4869 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4870 | and return this value. If more memory cannot be allocated, then | |
4871 | leave *VAR unchanged, and return null. */ | |
4872 | ||
4873 | static POINTER_TYPE * | |
4874 | mmap_realloc (var, nbytes) | |
4875 | POINTER_TYPE **var; | |
4876 | size_t nbytes; | |
4877 | { | |
4878 | POINTER_TYPE *result; | |
177c0ea7 | 4879 | |
b86af064 GM |
4880 | mmap_init (); |
4881 | ||
4882 | if (*var == NULL) | |
4883 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4884 | else if (nbytes == 0) |
b86af064 GM |
4885 | { |
4886 | mmap_free (var); | |
4887 | result = mmap_alloc (var, nbytes); | |
4888 | } | |
4889 | else | |
4890 | { | |
4891 | struct mmap_region *r = MMAP_REGION (*var); | |
4892 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4893 | |
b86af064 GM |
4894 | if (room < nbytes) |
4895 | { | |
4896 | /* Must enlarge. */ | |
4897 | POINTER_TYPE *old_ptr = *var; | |
4898 | ||
4899 | /* Try to map additional pages at the end of the region. | |
4900 | If that fails, allocate a new region, copy data | |
4901 | from the old region, then free it. */ | |
4902 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4903 | / mmap_page_size))) | |
4904 | { | |
4905 | r->nbytes_specified = nbytes; | |
4906 | *var = result = old_ptr; | |
4907 | } | |
4908 | else if (mmap_alloc (var, nbytes)) | |
4909 | { | |
4910 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4911 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4912 | result = *var; | |
4913 | r = MMAP_REGION (result); | |
4914 | r->nbytes_specified = nbytes; | |
4915 | } | |
4916 | else | |
4917 | { | |
4918 | *var = old_ptr; | |
4919 | result = NULL; | |
4920 | } | |
4921 | } | |
4922 | else if (room - nbytes >= mmap_page_size) | |
4923 | { | |
4924 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4925 | memory back to the system. |
4926 | ||
4927 | The extra parens are to make the division happens first, | |
4928 | on positive values, so we know it will round towards | |
4929 | zero. */ | |
bb63c5c9 | 4930 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4931 | result = *var; |
4932 | r->nbytes_specified = nbytes; | |
4933 | } | |
4934 | else | |
4935 | { | |
4936 | /* Leave it alone. */ | |
4937 | result = *var; | |
4938 | r->nbytes_specified = nbytes; | |
4939 | } | |
4940 | } | |
4941 | ||
4942 | return result; | |
4943 | } | |
4944 | ||
4945 | ||
4946 | /* Free a block of relocatable storage whose data is pointed to by | |
4947 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4948 | ||
4949 | static void | |
4950 | mmap_free (var) | |
4951 | POINTER_TYPE **var; | |
4952 | { | |
4953 | mmap_init (); | |
177c0ea7 | 4954 | |
b86af064 GM |
4955 | if (*var) |
4956 | { | |
4957 | mmap_free_1 (MMAP_REGION (*var)); | |
4958 | *var = NULL; | |
4959 | } | |
4960 | } | |
4961 | ||
4962 | ||
4963 | /* Perform necessary intializations for the use of mmap. */ | |
4964 | ||
4965 | static void | |
4966 | mmap_init () | |
4967 | { | |
4968 | #if MAP_ANON == 0 | |
4969 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4970 | in a dumped Emacs. */ | |
4971 | if (mmap_fd <= 0) | |
4972 | { | |
4973 | /* No anonymous mmap -- we need the file descriptor. */ | |
4974 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4975 | if (mmap_fd == -1) | |
4976 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4977 | } | |
4978 | #endif /* MAP_ANON == 0 */ | |
4979 | ||
4980 | if (mmap_initialized_p) | |
4981 | return; | |
4982 | mmap_initialized_p = 1; | |
177c0ea7 | 4983 | |
b86af064 GM |
4984 | #if MAP_ANON != 0 |
4985 | mmap_fd = -1; | |
4986 | #endif | |
177c0ea7 | 4987 | |
b86af064 GM |
4988 | mmap_page_size = getpagesize (); |
4989 | } | |
4990 | ||
4991 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4992 | ||
4993 | ||
4994 | \f | |
4995 | /*********************************************************************** | |
4996 | Buffer-text Allocation | |
4997 | ***********************************************************************/ | |
4998 | ||
4999 | #ifdef REL_ALLOC | |
5000 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
5001 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
5002 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
5003 | #endif /* REL_ALLOC */ | |
5004 | ||
5005 | ||
5006 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
5007 | ||
5008 | static void | |
5009 | alloc_buffer_text (b, nbytes) | |
5010 | struct buffer *b; | |
5011 | size_t nbytes; | |
5012 | { | |
5013 | POINTER_TYPE *p; | |
177c0ea7 | 5014 | |
b86af064 GM |
5015 | BLOCK_INPUT; |
5016 | #if defined USE_MMAP_FOR_BUFFERS | |
5017 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5018 | #elif defined REL_ALLOC | |
5019 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5020 | #else | |
815add84 | 5021 | p = xmalloc (nbytes); |
b86af064 | 5022 | #endif |
177c0ea7 | 5023 | |
b86af064 GM |
5024 | if (p == NULL) |
5025 | { | |
5026 | UNBLOCK_INPUT; | |
5027 | memory_full (); | |
5028 | } | |
5029 | ||
5030 | b->text->beg = (unsigned char *) p; | |
5031 | UNBLOCK_INPUT; | |
5032 | } | |
5033 | ||
5034 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
5035 | shrink it. */ | |
5036 | ||
5037 | void | |
5371d722 | 5038 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
5039 | { |
5040 | POINTER_TYPE *p; | |
5041 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
5042 | + delta); | |
5043 | BLOCK_INPUT; | |
5044 | #if defined USE_MMAP_FOR_BUFFERS | |
5045 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5046 | #elif defined REL_ALLOC | |
5047 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
5048 | #else | |
5049 | p = xrealloc (b->text->beg, nbytes); | |
5050 | #endif | |
177c0ea7 | 5051 | |
b86af064 GM |
5052 | if (p == NULL) |
5053 | { | |
5054 | UNBLOCK_INPUT; | |
5055 | memory_full (); | |
5056 | } | |
5057 | ||
5058 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5059 | UNBLOCK_INPUT; | |
5060 | } | |
5061 | ||
5062 | ||
5063 | /* Free buffer B's text buffer. */ | |
5064 | ||
5065 | static void | |
5066 | free_buffer_text (b) | |
5067 | struct buffer *b; | |
5068 | { | |
5069 | BLOCK_INPUT; | |
5070 | ||
5071 | #if defined USE_MMAP_FOR_BUFFERS | |
5072 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
5073 | #elif defined REL_ALLOC | |
5074 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
5075 | #else | |
5076 | xfree (b->text->beg); | |
5077 | #endif | |
177c0ea7 | 5078 | |
b86af064 GM |
5079 | BUF_BEG_ADDR (b) = NULL; |
5080 | UNBLOCK_INPUT; | |
5081 | } | |
5082 | ||
5083 | ||
5084 | \f | |
5085 | /*********************************************************************** | |
5086 | Initialization | |
5087 | ***********************************************************************/ | |
5088 | ||
dfcf069d | 5089 | void |
1ab256cb RM |
5090 | init_buffer_once () |
5091 | { | |
7c02e886 GM |
5092 | int idx; |
5093 | ||
5094 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 5095 | |
1ab256cb RM |
5096 | /* Make sure all markable slots in buffer_defaults |
5097 | are initialized reasonably, so mark_buffer won't choke. */ | |
5098 | reset_buffer (&buffer_defaults); | |
13de9290 | 5099 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 5100 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5101 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5102 | /* Prevent GC from getting confused. */ |
5103 | buffer_defaults.text = &buffer_defaults.own_text; | |
5104 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5105 | BUF_INTERVALS (&buffer_defaults) = 0; |
5106 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5107 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5108 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5109 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5110 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5111 | |
5112 | /* Set up the default values of various buffer slots. */ | |
5113 | /* Must do these before making the first buffer! */ | |
5114 | ||
f532dca0 | 5115 | /* real setup is done in bindings.el */ |
1ab256cb | 5116 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 5117 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5118 | buffer_defaults.abbrev_mode = Qnil; |
5119 | buffer_defaults.overwrite_mode = Qnil; | |
5120 | buffer_defaults.case_fold_search = Qt; | |
5121 | buffer_defaults.auto_fill_function = Qnil; | |
5122 | buffer_defaults.selective_display = Qnil; | |
5123 | #ifndef old | |
5124 | buffer_defaults.selective_display_ellipses = Qt; | |
5125 | #endif | |
5126 | buffer_defaults.abbrev_table = Qnil; | |
5127 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5128 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5129 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5130 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5131 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5132 | buffer_defaults.overlays_before = NULL; |
5133 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5134 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5135 | |
8d7a4592 | 5136 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
5137 | buffer_defaults.truncate_lines = Qnil; |
5138 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 5139 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5140 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5141 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5142 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5143 | |
f7975d07 | 5144 | #ifdef DOS_NT |
0776cb1b | 5145 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5146 | #endif |
a1a17b61 | 5147 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5148 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5149 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5150 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5151 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5152 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5153 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5154 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5155 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5156 | buffer_defaults.left_fringe_width = Qnil; | |
5157 | buffer_defaults.right_fringe_width = Qnil; | |
5158 | buffer_defaults.fringes_outside_margins = Qnil; | |
5159 | buffer_defaults.scroll_bar_width = Qnil; | |
5160 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5161 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5162 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5163 | buffer_defaults.fringe_indicator_alist = Qnil; |
5164 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5165 | buffer_defaults.scroll_up_aggressively = Qnil; |
5166 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5167 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5168 | |
5169 | /* Assign the local-flags to the slots that have default values. | |
5170 | The local flag is a bit that is used in the buffer | |
5171 | to say that it has its own local value for the slot. | |
5172 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5173 | ||
5174 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5175 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5176 | |
5177 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5178 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5179 | XSETINT (buffer_local_flags.filename, -1); |
5180 | XSETINT (buffer_local_flags.directory, -1); | |
5181 | XSETINT (buffer_local_flags.backed_up, -1); | |
5182 | XSETINT (buffer_local_flags.save_length, -1); | |
5183 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5184 | XSETINT (buffer_local_flags.read_only, -1); | |
5185 | XSETINT (buffer_local_flags.major_mode, -1); | |
5186 | XSETINT (buffer_local_flags.mode_name, -1); | |
5187 | XSETINT (buffer_local_flags.undo_list, -1); | |
5188 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5189 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5190 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5191 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5192 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5193 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5194 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5195 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5196 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5197 | |
7c02e886 GM |
5198 | idx = 1; |
5199 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5200 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5201 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5202 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5203 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5204 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5205 | #ifndef old |
7c02e886 | 5206 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5207 | #endif |
7c02e886 GM |
5208 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5209 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5210 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5211 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5212 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5213 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5214 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5215 | #ifdef DOS_NT |
7c02e886 | 5216 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5217 | /* Make this one a permanent local. */ |
7c02e886 | 5218 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5219 | #endif |
7c02e886 GM |
5220 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5221 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5222 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5223 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5224 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5225 | /* Make this one a permanent local. */ |
7c02e886 | 5226 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5227 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5228 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5229 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5230 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5231 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5232 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5233 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5234 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5235 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5236 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5237 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5238 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5239 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5240 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5241 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5242 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5243 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5244 | |
5245 | /* Need more room? */ | |
7313acd0 | 5246 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5247 | abort (); |
7313acd0 | 5248 | last_per_buffer_idx = idx; |
177c0ea7 | 5249 | |
1ab256cb RM |
5250 | Vbuffer_alist = Qnil; |
5251 | current_buffer = 0; | |
5252 | all_buffers = 0; | |
5253 | ||
5254 | QSFundamental = build_string ("Fundamental"); | |
5255 | ||
5256 | Qfundamental_mode = intern ("fundamental-mode"); | |
5257 | buffer_defaults.major_mode = Qfundamental_mode; | |
5258 | ||
5259 | Qmode_class = intern ("mode-class"); | |
5260 | ||
5261 | Qprotected_field = intern ("protected-field"); | |
5262 | ||
5263 | Qpermanent_local = intern ("permanent-local"); | |
5264 | ||
5265 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5266 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5267 | |
48265e61 DL |
5268 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5269 | ||
1ab256cb | 5270 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5271 | |
1ab256cb RM |
5272 | /* super-magic invisible buffer */ |
5273 | Vbuffer_alist = Qnil; | |
5274 | ||
ffd56f97 | 5275 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5276 | |
5277 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5278 | } |
5279 | ||
dfcf069d | 5280 | void |
1ab256cb RM |
5281 | init_buffer () |
5282 | { | |
2381d133 | 5283 | char *pwd; |
136351b7 | 5284 | Lisp_Object temp; |
b639c9be | 5285 | int len; |
1ab256cb | 5286 | |
b86af064 | 5287 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5288 | { |
5289 | /* When using the ralloc implementation based on mmap(2), buffer | |
5290 | text pointers will have been set to null in the dumped Emacs. | |
5291 | Map new memory. */ | |
5292 | struct buffer *b; | |
177c0ea7 | 5293 | |
93c27ef1 GM |
5294 | for (b = all_buffers; b; b = b->next) |
5295 | if (b->text->beg == NULL) | |
b86af064 | 5296 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5297 | } |
b86af064 | 5298 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5299 | |
1ab256cb | 5300 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5301 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5302 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5303 | |
01537133 | 5304 | pwd = get_current_dir_name (); |
a17b5ed1 | 5305 | |
156bdb41 | 5306 | if (!pwd) |
a17b5ed1 | 5307 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb RM |
5308 | |
5309 | #ifndef VMS | |
5310 | /* Maybe this should really use some standard subroutine | |
5311 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5312 | len = strlen (pwd); |
5313 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5314 | { |
156bdb41 | 5315 | /* Grow buffer to add directory separator and '\0'. */ |
b639c9be RF |
5316 | pwd = (char *) xrealloc (pwd, len + 2); |
5317 | pwd[len] = DIRECTORY_SEP; | |
5318 | pwd[len + 1] = '\0'; | |
f7975d07 | 5319 | } |
1ab256cb | 5320 | #endif /* not VMS */ |
0995fa35 | 5321 | |
01537133 | 5322 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5323 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5324 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5325 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5326 | that ENCODE_FILE correctly gets the original bytes. */ |
5327 | current_buffer->directory | |
5328 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5329 | |
0995fa35 RS |
5330 | /* Add /: to the front of the name |
5331 | if it would otherwise be treated as magic. */ | |
5332 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5333 | if (! NILP (temp) |
5334 | /* If the default dir is just /, TEMP is non-nil | |
5335 | because of the ange-ftp completion handler. | |
5336 | However, it is not necessary to turn / into /:/. | |
5337 | So avoid doing that. */ | |
d5db4077 | 5338 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5339 | current_buffer->directory |
5340 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5341 | ||
136351b7 RS |
5342 | temp = get_minibuffer (0); |
5343 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5344 | |
5345 | free (pwd); | |
1ab256cb RM |
5346 | } |
5347 | ||
d6aa1876 SM |
5348 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5349 | Object stored in the current buffer. address is the address of the slot | |
5350 | in the buffer that is current now. */ | |
5351 | ||
5352 | /* TYPE is nil for a general Lisp variable. | |
5353 | An integer specifies a type; then only LIsp values | |
5354 | with that type code are allowed (except that nil is allowed too). | |
5355 | LNAME is the LIsp-level variable name. | |
5356 | VNAME is the name of the buffer slot. | |
5357 | DOC is a dummy where you write the doc string as a comment. */ | |
5358 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ | |
5359 | defvar_per_buffer (lname, vname, type, 0) | |
5360 | ||
5361 | static void | |
5362 | defvar_per_buffer (namestring, address, type, doc) | |
5363 | char *namestring; | |
5364 | Lisp_Object *address; | |
5365 | Lisp_Object type; | |
5366 | char *doc; | |
5367 | { | |
5368 | Lisp_Object sym, val; | |
5369 | int offset; | |
5370 | ||
5371 | sym = intern (namestring); | |
5372 | val = allocate_misc (); | |
5373 | offset = (char *)address - (char *)current_buffer; | |
5374 | ||
5375 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; | |
5376 | XBUFFER_OBJFWD (val)->offset = offset; | |
64e16c3c | 5377 | XBUFFER_OBJFWD (val)->slottype = type; |
d6aa1876 SM |
5378 | SET_SYMBOL_VALUE (sym, val); |
5379 | PER_BUFFER_SYMBOL (offset) = sym; | |
d6aa1876 SM |
5380 | |
5381 | if (PER_BUFFER_IDX (offset) == 0) | |
5382 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5383 | slot of buffer_local_flags */ | |
5384 | abort (); | |
5385 | } | |
5386 | ||
5387 | ||
1ab256cb | 5388 | /* initialize the buffer routines */ |
dfcf069d | 5389 | void |
1ab256cb RM |
5390 | syms_of_buffer () |
5391 | { | |
9115729e KH |
5392 | staticpro (&last_overlay_modification_hooks); |
5393 | last_overlay_modification_hooks | |
5394 | = Fmake_vector (make_number (10), Qnil); | |
5395 | ||
1ab256cb RM |
5396 | staticpro (&Vbuffer_defaults); |
5397 | staticpro (&Vbuffer_local_symbols); | |
5398 | staticpro (&Qfundamental_mode); | |
5399 | staticpro (&Qmode_class); | |
5400 | staticpro (&QSFundamental); | |
5401 | staticpro (&Vbuffer_alist); | |
5402 | staticpro (&Qprotected_field); | |
5403 | staticpro (&Qpermanent_local); | |
2f7a359d RS |
5404 | Qpermanent_local_hook = intern ("permanent-local-hook"); |
5405 | staticpro (&Qpermanent_local_hook); | |
1ab256cb | 5406 | staticpro (&Qkill_buffer_hook); |
22378665 | 5407 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5408 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5409 | Qevaporate = intern ("evaporate"); |
5410 | staticpro (&Qevaporate); | |
294d215f | 5411 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5412 | staticpro (&Qmodification_hooks); |
294d215f | 5413 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5414 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5415 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5416 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5417 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5418 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5419 | Qpriority = intern ("priority"); |
5420 | staticpro (&Qpriority); | |
5421 | Qwindow = intern ("window"); | |
5422 | staticpro (&Qwindow); | |
bbbe9545 KH |
5423 | Qbefore_string = intern ("before-string"); |
5424 | staticpro (&Qbefore_string); | |
5425 | Qafter_string = intern ("after-string"); | |
5426 | staticpro (&Qafter_string); | |
22378665 RS |
5427 | Qfirst_change_hook = intern ("first-change-hook"); |
5428 | staticpro (&Qfirst_change_hook); | |
5429 | Qbefore_change_functions = intern ("before-change-functions"); | |
5430 | staticpro (&Qbefore_change_functions); | |
5431 | Qafter_change_functions = intern ("after-change-functions"); | |
5432 | staticpro (&Qafter_change_functions); | |
2f7a359d | 5433 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5434 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5435 | |
5b20caf0 RS |
5436 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5437 | staticpro (&Qkill_buffer_query_functions); | |
5438 | ||
1ab256cb RM |
5439 | Fput (Qprotected_field, Qerror_conditions, |
5440 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5441 | Fput (Qprotected_field, Qerror_message, | |
5442 | build_string ("Attempt to modify a protected field")); | |
5443 | ||
5444 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5445 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5446 | ||
5447 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5448 | &buffer_defaults.mode_line_format, |
5449 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5450 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5451 | |
045dee35 | 5452 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5453 | &buffer_defaults.header_line_format, |
5454 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5455 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5456 | |
7ee72033 MB |
5457 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5458 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5459 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5460 | |
a3bbced0 | 5461 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5462 | &buffer_defaults.extra_line_spacing, |
5463 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5464 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5465 | |
187ccf49 KS |
5466 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5467 | &buffer_defaults.cursor_in_non_selected_windows, | |
5468 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5469 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5470 | ||
1ab256cb | 5471 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5472 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5473 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5474 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5475 | |
5476 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5477 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5478 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5479 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5480 | |
5e2ad10b JB |
5481 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5482 | &buffer_defaults.direction_reversed, | |
5483 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5484 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5485 | |
5e2ad10b JB |
5486 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5487 | &buffer_defaults.enable_multibyte_characters, | |
5488 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5489 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5490 | |
5e2ad10b JB |
5491 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5492 | &buffer_defaults.buffer_file_coding_system, | |
5493 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5494 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5495 | |
1ab256cb | 5496 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5497 | &buffer_defaults.truncate_lines, |
5498 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5499 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5500 | |
5501 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5502 | &buffer_defaults.fill_column, |
5503 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5504 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5505 | |
5506 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5507 | &buffer_defaults.left_margin, |
5508 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5509 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5510 | |
5511 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5512 | &buffer_defaults.tab_width, |
23625946 | 5513 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5514 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5515 | |
5516 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5517 | &buffer_defaults.case_fold_search, |
5518 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5519 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5520 | |
f7975d07 | 5521 | #ifdef DOS_NT |
177c0ea7 | 5522 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5523 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5524 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5525 | This is the same as (default-value 'buffer-file-type). |
5526 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5527 | #endif |
5528 | ||
0552666b | 5529 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5530 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5531 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5532 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5533 | |
5534 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5535 | &buffer_defaults.right_margin_cols, |
5536 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5537 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5538 | |
2ad8731a KS |
5539 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5540 | &buffer_defaults.left_fringe_width, | |
5541 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5542 | This is the same as (default-value 'left-fringe-width). */); | |
5543 | ||
5544 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5545 | &buffer_defaults.right_fringe_width, | |
5546 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5547 | This is the same as (default-value 'right-fringe-width). */); | |
5548 | ||
5549 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5550 | &buffer_defaults.fringes_outside_margins, | |
5551 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5552 | This is the same as (default-value 'fringes-outside-margins). */); | |
5553 | ||
5554 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5555 | &buffer_defaults.scroll_bar_width, | |
5556 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5557 | This is the same as (default-value 'scroll-bar-width). */); | |
5558 | ||
5559 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5560 | &buffer_defaults.vertical_scroll_bar_type, | |
5561 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5562 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5563 | ||
0552666b | 5564 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5565 | &buffer_defaults.indicate_empty_lines, |
5566 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5567 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5568 | |
6b61353c KH |
5569 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5570 | &buffer_defaults.indicate_buffer_boundaries, | |
5571 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5572 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5573 | ||
c6a46372 KS |
5574 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5575 | &buffer_defaults.fringe_indicator_alist, | |
5576 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5577 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5578 | ||
5579 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5580 | &buffer_defaults.fringe_cursor_alist, | |
5581 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5582 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5583 | ||
0552666b | 5584 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5585 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5586 | doc: /* Default value of `scroll-up-aggressively'. |
5587 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5588 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5589 | |
0552666b | 5590 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5591 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5592 | doc: /* Default value of `scroll-down-aggressively'. |
5593 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5594 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5595 | |
045dee35 | 5596 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5597 | ¤t_buffer->header_line_format, |
7ee72033 | 5598 | Qnil, |
7614d762 RS |
5599 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5600 | The header line appears, optionally, at the top of a window; | |
5601 | the mode line appears at the bottom. */); | |
177c0ea7 | 5602 | |
1ab256cb | 5603 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5604 | Qnil, |
5605 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5606 | Each buffer has its own value of this variable. |
5607 | Value may be nil, a string, a symbol or a list or cons cell. | |
5608 | A value of nil means don't display a mode line. | |
5609 | For a symbol, its value is used (but it is ignored if t or nil). | |
5610 | A string appearing directly as the value of a symbol is processed verbatim | |
5611 | in that the %-constructs below are not recognized. | |
ed463255 | 5612 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5613 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5614 | in the value of that symbol will be ignored. |
018ba359 | 5615 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5616 | is used as a mode line element. Be careful--FORM should not load any files, |
5617 | because that can cause an infinite recursion. | |
ed463255 KS |
5618 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5619 | with the specified properties PROPS applied. | |
018ba359 PJ |
5620 | For a list whose car is a symbol, the symbol's value is taken, |
5621 | and if that is non-nil, the cadr of the list is processed recursively. | |
5622 | Otherwise, the caddr of the list (if there is one) is processed. | |
5623 | For a list whose car is a string or list, each element is processed | |
5624 | recursively and the results are effectively concatenated. | |
5625 | For a list whose car is an integer, the cdr of the list is processed | |
5626 | and padded (if the number is positive) or truncated (if negative) | |
5627 | to the width specified by that number. | |
5628 | A string is printed verbatim in the mode line except for %-constructs: | |
5629 | (%-constructs are allowed when the string is the entire mode-line-format | |
5630 | or when it is found in a cons-cell or a list) | |
5631 | %b -- print buffer name. %f -- print visited file name. | |
5632 | %F -- print frame name. | |
5633 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5634 | %& is like %*, but ignore read-only-ness. | |
5635 | % means buffer is read-only and * means it is modified. | |
5636 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5637 | %s -- print process status. %l -- print the current line number. | |
5638 | %c -- print the current column number (this makes editing slower). | |
5639 | To make the column number update correctly in all cases, | |
5640 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5641 | %i -- print the size of the buffer. |
5642 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5643 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5644 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5645 | or print Bottom or All. | |
018ba359 | 5646 | %n -- print Narrow if appropriate. |
dafbe726 | 5647 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5648 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5649 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5650 | %e -- print error message about full memory. |
f7165034 NR |
5651 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5652 | remote machine. | |
018ba359 PJ |
5653 | %[ -- print one [ for each recursive editing level. %] similar. |
5654 | %% -- print %. %- -- print infinitely many dashes. | |
5655 | Decimal digits after the % specify field width to which to pad. */); | |
5656 | ||
7ee72033 | 5657 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5658 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
0493af6f JB |
5659 | A value of nil means use current buffer's major mode, |
5660 | provided it is not marked as "special". | |
557ca2c1 RS |
5661 | |
5662 | When a mode is used by default, `find-file' switches to it | |
5663 | before it reads the contents into the buffer and before | |
5664 | it finishes setting up the buffer. Thus, the mode and | |
5665 | its hooks should not expect certain variables such as | |
5666 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5667 | |
5668 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5669 | make_number (Lisp_Symbol), |
efc7e75f | 5670 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5671 | |
5672 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5673 | Qnil, |
64a7c220 | 5674 | doc: /* Pretty name of current buffer's major mode. |
d224e8c2 GM |
5675 | Usually a string. See `mode-line-format' for other possible forms. |
5676 | Use the function `format-mode-line' to get the value as a string. */); | |
1ab256cb | 5677 | |
d6aa1876 SM |
5678 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5679 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5680 | ||
7ee72033 | 5681 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5682 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5683 | |
5684 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5685 | Qnil, |
efc7e75f | 5686 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5687 | |
5688 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5689 | make_number (Lisp_Int), |
1ac5826d | 5690 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5691 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5692 | |
5693 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5694 | make_number (Lisp_Int), |
fc961256 | 5695 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5696 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5697 | |
5698 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5699 | make_number (Lisp_Int), |
efc7e75f | 5700 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5701 | |
7ee72033 | 5702 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5703 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5704 | A value of nil means use backslash and octal digits. |
5705 | This variable does not apply to characters whose display is specified | |
5706 | in the current display table (if there is one). */); | |
1ab256cb | 5707 | |
3b06f880 | 5708 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5709 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5710 | Qnil, |
efc7e75f | 5711 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5712 | Otherwise they are regarded as unibyte. This affects the display, |
5713 | file I/O and the behavior of various editing commands. | |
5714 | ||
5715 | This variable is buffer-local but you cannot set it directly; | |
5716 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5717 | Changing its default value with `setq-default' is supported. | |
5718 | See also variable `default-enable-multibyte-characters' and Info node | |
5719 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5720 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5721 | |
c71b5d9b | 5722 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5723 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5724 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5725 | This variable applies to saving the buffer, and also to `write-region' |
5726 | and other functions that use `write-region'. | |
5727 | It does not apply to sending output to subprocesses, however. | |
5728 | ||
5729 | If this is nil, the buffer is saved without any code conversion | |
5730 | unless some coding system is specified in `file-coding-system-alist' | |
5731 | for the buffer file. | |
5732 | ||
31a6cb06 EZ |
5733 | If the text to be saved cannot be encoded as specified by this variable, |
5734 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5735 | ||
018ba359 PJ |
5736 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5737 | ||
5738 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5739 | |
3b06f880 | 5740 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5741 | Qnil, |
efc7e75f | 5742 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5743 | |
7ee72033 | 5744 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5745 | doc: /* *Non-nil means do not display continuation lines. |
5746 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5747 | |
5748 | Note that this is overridden by the variable | |
5749 | `truncate-partial-width-windows' if that variable is non-nil | |
5750 | and this buffer is not full-frame width. */); | |
1ab256cb | 5751 | |
f7975d07 | 5752 | #ifdef DOS_NT |
54ad07d3 | 5753 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5754 | Qnil, |
efc7e75f | 5755 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5756 | This variable is meaningful on MS-DOG and Windows NT. |
5757 | On those systems, it is automatically local in every buffer. | |
5758 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5759 | #endif |
5760 | ||
1ab256cb | 5761 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5762 | make_number (Lisp_String), |
efc7e75f | 5763 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5764 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5765 | |
5766 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5767 | Qnil, |
efc7e75f | 5768 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5769 | It is called after self-inserting any character specified in |
5770 | the `auto-fill-chars' table. | |
5771 | NOTE: This variable is not a hook; | |
5772 | its value may not be a list of functions. */); | |
1ab256cb RM |
5773 | |
5774 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5775 | make_number (Lisp_String), |
efc7e75f | 5776 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5777 | |
f6ed2e84 | 5778 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5779 | make_number (Lisp_String), |
efc7e75f | 5780 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5781 | The truename of a file is calculated by `file-truename' |
5782 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5783 | |
1ab256cb | 5784 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5785 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5786 | make_number (Lisp_String), |
7614d762 RS |
5787 | doc: /* Name of file for auto-saving current buffer. |
5788 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5789 | |
7ee72033 | 5790 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5791 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5792 | |
7ee72033 | 5793 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5794 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5795 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5796 | |
5797 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5798 | make_number (Lisp_Int), |
efc7e75f | 5799 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5800 | 0 initially. */); |
1ab256cb RM |
5801 | |
5802 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5803 | Qnil, |
7614d762 | 5804 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5805 | An integer N as value means display only lines |
5806 | that start with less than N columns of space. | |
7614d762 RS |
5807 | A value of t means that the character ^M makes itself and |
5808 | all the rest of the line invisible; also, when saving the buffer | |
5809 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5810 | |
5811 | #ifndef old | |
5812 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5813 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5814 | Qnil, |
3f676284 | 5815 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5816 | #endif |
5817 | ||
7ee72033 | 5818 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5819 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5820 | The value should be one of `overwrite-mode-textual', |
5821 | `overwrite-mode-binary', or nil. | |
5822 | If it is `overwrite-mode-textual', self-insertion still | |
5823 | inserts at the end of a line, and inserts when point is before a tab, | |
5824 | until the tab is filled in. | |
5825 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5826 | ||
54939090 | 5827 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5828 | Qnil, |
efc7e75f | 5829 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5830 | |
5831 | If this variable is nil, the value of `standard-display-table' is used. | |
5832 | Each window can have its own, overriding display table, see | |
5833 | `set-window-display-table' and `window-display-table'. | |
5834 | ||
5835 | The display table is a char-table created with `make-display-table'. | |
5836 | A char-table is an array indexed by character codes. Normal array | |
5837 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5838 | ||
5839 | Each of the char-table elements control how to display the corresponding | |
5840 | text character: the element at index C in the table says how to display | |
5841 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5842 | characters or nil. The value nil means display the character in the |
5843 | default fashion; otherwise, the characters from the vector are delivered | |
5844 | to the screen instead of the original character. | |
018ba359 | 5845 | |
5fd11dc8 | 5846 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5847 | to display a capital Y instead of each X character. |
018ba359 PJ |
5848 | |
5849 | In addition, a char-table has six extra slots to control the display of: | |
5850 | ||
5851 | the end of a truncated screen line (extra-slot 0, a single character); | |
5852 | the end of a continued line (extra-slot 1, a single character); | |
5853 | the escape character used to display character codes in octal | |
5854 | (extra-slot 2, a single character); | |
5855 | the character used as an arrow for control characters (extra-slot 3, | |
5856 | a single character); | |
5857 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5858 | a vector of characters); | |
5859 | the character used to draw the border between side-by-side windows | |
5860 | (extra-slot 5, a single character). | |
5861 | ||
5862 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5863 | |
2ad8731a | 5864 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5865 | Qnil, |
efc7e75f | 5866 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5867 | A value of nil means no marginal area. */); |
177c0ea7 | 5868 | |
2ad8731a | 5869 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5870 | Qnil, |
efc7e75f | 5871 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5872 | A value of nil means no marginal area. */); |
177c0ea7 | 5873 | |
2ad8731a KS |
5874 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5875 | Qnil, | |
5876 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5877 | A value of 0 means no left fringe is shown in this buffer's window. | |
5878 | A value of nil means to use the left fringe width from the window's frame. */); | |
5879 | ||
5880 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5881 | Qnil, | |
5882 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5883 | A value of 0 means no right fringe is shown in this buffer's window. | |
5884 | A value of nil means to use the right fringe width from the window's frame. */); | |
5885 | ||
5886 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5887 | Qnil, | |
5888 | doc: /* *Non-nil means to display fringes outside display margins. | |
5889 | A value of nil means to display fringes between margins and buffer text. */); | |
5890 | ||
5891 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5892 | Qnil, | |
5893 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5894 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5895 | ||
5896 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5897 | Qnil, | |
5898 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5899 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5900 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5901 | |
fc2c8887 RS |
5902 | A value of `left' or `right' means put the vertical scroll bar at that side |
5903 | of the window; a value of nil means don't show any vertical scroll bars. | |
5904 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5905 | |
0552666b | 5906 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5907 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5908 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5909 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5910 | window-systems. */); | |
177c0ea7 | 5911 | |
6b61353c KH |
5912 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5913 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5914 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5915 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5916 | of a window on window-systems with angle bitmaps, or if the window can be | |
5917 | scrolled, the top and bottom line of the window are marked with up and down | |
5918 | arrow bitmaps. | |
b2229037 KS |
5919 | |
5920 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5921 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5922 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5923 | the left fringe but no arrows. |
b2229037 | 5924 | |
79e3497d RS |
5925 | You can exercise more precise control by using an alist as the |
5926 | value. Each alist element (INDICATOR . POSITION) specifies | |
5927 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5928 | `bottom', `up', `down', or t, which specifies the default position, |
5929 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5930 | this indicator. | |
5931 | ||
5932 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5933 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5934 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5935 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5936 | |
c6a46372 KS |
5937 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5938 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5939 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5940 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5941 | specifies the fringe bitmaps used to display a specific logical | |
5942 | fringe indicator. | |
5943 | ||
5944 | INDICATOR specifies the logical indicator type which is one of the | |
5945 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5946 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5947 | ||
5948 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5949 | the actual bitmap shown in the left or right fringe for the logical | |
5950 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5951 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5952 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5953 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5954 | symbol which is used in both left and right fringes. */); |
5955 | ||
5956 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5957 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5958 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5959 | The value is an alist where each element (CURSOR . BITMAP) | |
5960 | specifies the fringe bitmaps used to display a specific logical | |
5961 | cursor type in the fringe. | |
5962 | ||
5963 | CURSOR specifies the logical cursor type which is one of the following | |
5964 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5965 | one is used to show a hollow cursor on narrow lines display lines | |
5966 | where the normal hollow cursor will not fit. | |
5967 | ||
5968 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5969 | cursor type. */); | |
5970 | ||
0552666b | 5971 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5972 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5973 | doc: /* How far to scroll windows upward. |
5974 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5975 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5976 | means scroll to center point. A fraction means scroll to put point |
5977 | that fraction of the window's height from the bottom of the window. | |
5978 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5979 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5980 | point goes at the top, so that in that simple case, the window | |
e5f95d5c | 5981 | scrolls by a full window height. Meaningful values are |
175e9712 | 5982 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5983 | |
0552666b | 5984 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5985 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5986 | doc: /* How far to scroll windows downward. |
5987 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5988 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5989 | means scroll to center point. A fraction means scroll to put point |
5990 | that fraction of the window's height from the top of the window. | |
5991 | When the value is 0.0, point goes at the top line, which in the simple | |
5992 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5993 | point goes at the bottom, so that in that simple case, the window | |
e5f95d5c | 5994 | scrolls by a full window height. Meaningful values are |
175e9712 | 5995 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5996 | |
1ab256cb RM |
5997 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5998 | "Don't ask."); | |
5999 | */ | |
1ab256cb | 6000 | |
7ee72033 MB |
6001 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
6002 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
6003 | Two arguments are passed to each function: the positions of |
6004 | the beginning and end of the range of old text to be changed. | |
6005 | \(For an insertion, the beginning and end are at the same place.) | |
6006 | No information is given about the length of the text after the change. | |
6007 | ||
6008 | Buffer changes made while executing the `before-change-functions' | |
6009 | don't call any before-change or after-change functions. | |
6010 | That's because these variables are temporarily set to nil. | |
6011 | As a result, a hook function cannot straightforwardly alter the value of | |
6012 | these variables. See the Emacs Lisp manual for a way of | |
6013 | accomplishing an equivalent result by using other variables. | |
6014 | ||
6015 | If an unhandled error happens in running these functions, | |
6016 | the variable's value remains nil. That prevents the error | |
6017 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6018 | Vbefore_change_functions = Qnil; |
6019 | ||
7ee72033 | 6020 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 6021 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
6022 | Three arguments are passed to each function: the positions of |
6023 | the beginning and end of the range of changed text, | |
6024 | and the length in bytes of the pre-change text replaced by that range. | |
6025 | \(For an insertion, the pre-change length is zero; | |
6026 | for a deletion, that length is the number of bytes deleted, | |
6027 | and the post-change beginning and end are at the same place.) | |
6028 | ||
6029 | Buffer changes made while executing the `after-change-functions' | |
6030 | don't call any before-change or after-change functions. | |
6031 | That's because these variables are temporarily set to nil. | |
6032 | As a result, a hook function cannot straightforwardly alter the value of | |
6033 | these variables. See the Emacs Lisp manual for a way of | |
6034 | accomplishing an equivalent result by using other variables. | |
6035 | ||
6036 | If an unhandled error happens in running these functions, | |
6037 | the variable's value remains nil. That prevents the error | |
6038 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
6039 | Vafter_change_functions = Qnil; |
6040 | ||
7ee72033 | 6041 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 6042 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 6043 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 6044 | Vfirst_change_hook = Qnil; |
1ab256cb | 6045 | |
7ee72033 MB |
6046 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
6047 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
6048 | Recent changes come first; older changes follow newer. |
6049 | ||
6050 | An entry (BEG . END) represents an insertion which begins at | |
6051 | position BEG and ends at position END. | |
6052 | ||
6053 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6054 | from (abs POSITION). If POSITION is positive, point was at the front | |
6055 | of the text being deleted; if negative, point was at the end. | |
6056 | ||
6057 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6058 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6059 | of the visited file's modification time, as of that time. If the | |
6060 | modification time of the most recent save is different, this entry is | |
6061 | obsolete. | |
6062 | ||
6063 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6064 | was modified between BEG and END. PROPERTY is the property name, | |
6065 | and VALUE is the old value. | |
6066 | ||
7405f386 KS |
6067 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6068 | \(apply FUN-NAME ARGS). | |
6069 | ||
6070 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6071 | in the active region. BEG and END is the range affected by this entry | |
6072 | and DELTA is the number of bytes added or deleted in that range by | |
6073 | this change. | |
c6c7dc03 | 6074 | |
018ba359 PJ |
6075 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6076 | was adjusted in position by the offset DISTANCE (an integer). | |
6077 | ||
6078 | An entry of the form POSITION indicates that point was at the buffer | |
6079 | location given by the integer. Undoing an entry of this form places | |
6080 | point at POSITION. | |
6081 | ||
b4c4f2f4 JB |
6082 | Entries with value `nil' mark undo boundaries. The undo command treats |
6083 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6084 | |
6085 | If the value of the variable is t, undo information is not recorded. */); | |
6086 | ||
7ee72033 MB |
6087 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6088 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6089 | |
7ee72033 MB |
6090 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6091 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6092 | |
6093 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6094 | newlines. Columnar operations (like `move-to-column' and |
6095 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6096 | widths as they go. This works well for ordinary text, but if the |
6097 | buffer's lines are very long (say, more than 500 characters), these | |
6098 | motion functions will take longer to execute. Emacs may also take | |
6099 | longer to update the display. | |
6100 | ||
5629f29b | 6101 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6102 | results of their scans, and consult the cache to avoid rescanning |
6103 | regions of the buffer until the text is modified. The caches are most | |
6104 | beneficial when they prevent the most searching---that is, when the | |
6105 | buffer contains long lines and large regions of characters with the | |
6106 | same, fixed screen width. | |
6107 | ||
5629f29b | 6108 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6109 | become slightly slower (because of the overhead of consulting the |
6110 | cache), and the caches will use memory roughly proportional to the | |
6111 | number of newlines and characters whose screen width varies. | |
6112 | ||
6113 | The caches require no explicit maintenance; their accuracy is | |
6114 | maintained internally by the Emacs primitives. Enabling or disabling | |
6115 | the cache should not affect the behavior of any of the motion | |
6116 | functions; it should only affect their performance. */); | |
6117 | ||
7ee72033 MB |
6118 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6119 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6120 | |
7ee72033 MB |
6121 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6122 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6123 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6124 | set when a file is visited. */); |
be9aafdd | 6125 | |
71ed49fa LT |
6126 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6127 | ¤t_buffer->auto_save_file_format, Qnil, | |
6128 | doc: /* *Format in which to write auto-save files. | |
6129 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6130 | If it is t, which is the default, auto-save files are written in the | |
6131 | same format as a regular save would use. */); | |
6132 | ||
3cb719bd | 6133 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6134 | ¤t_buffer->invisibility_spec, Qnil, |
6135 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6136 | The default is t, which means that text is invisible |
6137 | if it has a non-nil `invisible' property. | |
6138 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6139 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6140 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6141 | then characters with property value PROP are invisible, | |
6142 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6143 | |
7962a441 | 6144 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6145 | ¤t_buffer->display_count, Qnil, |
6146 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6147 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6148 | |
6149 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6150 | ¤t_buffer->display_time, Qnil, |
6151 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6152 | The function `set-window-buffer' updates this variable |
6153 | to the value obtained by calling `current-time'. | |
6154 | If the buffer has never been shown in a window, the value is nil. */); | |
6155 | ||
7ee72033 | 6156 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
526c9df9 | 6157 | doc: /* */); |
c48f61ef | 6158 | Vtransient_mark_mode = Qnil; |
526c9df9 CY |
6159 | /* The docstring is in simple.el. If we put it here, it would be |
6160 | overwritten when transient-mark-mode is defined using | |
6161 | define-minor-mode. */ | |
c48f61ef | 6162 | |
7ee72033 MB |
6163 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6164 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6165 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6166 | text properties. If the value is a list, disregard `buffer-read-only' | |
6167 | and disregard a `read-only' text property if the property value | |
6168 | is a member of the list. */); | |
a96b68f1 RS |
6169 | Vinhibit_read_only = Qnil; |
6170 | ||
7ee72033 | 6171 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6172 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6173 | Values are interpreted as follows: |
6174 | ||
b8dc613f JB |
6175 | t use the cursor specified for the frame |
6176 | nil don't display a cursor | |
6177 | box display a filled box cursor | |
6178 | hollow display a hollow box cursor | |
6179 | bar display a vertical bar cursor with default width | |
6180 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6181 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6182 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6183 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 RS |
6184 | |
6185 | When the buffer is displayed in a nonselected window, | |
6186 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 6187 | |
a3bbced0 | 6188 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6189 | ¤t_buffer->extra_line_spacing, Qnil, |
6190 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
6191 | The space is measured in pixels, and put below lines on window systems. |
6192 | If value is a floating point number, it specifies the spacing relative | |
fc961256 | 6193 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6194 | |
0124c5bd | 6195 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6196 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6197 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6198 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6199 | |
7ee72033 | 6200 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6201 | doc: /* List of functions called with no args to query before killing a buffer. |
6202 | The buffer being killed will be current while the functions are running. | |
6203 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6204 | Vkill_buffer_query_functions = Qnil; |
6205 | ||
43ed3b8d CY |
6206 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6207 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6208 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6209 | Vchange_major_mode_hook = Qnil; | |
6210 | Qchange_major_mode_hook = intern ("change-major-mode-hook"); | |
6211 | staticpro (&Qchange_major_mode_hook); | |
6212 | ||
0dc88e60 | 6213 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6214 | defsubr (&Sbuffer_list); |
6215 | defsubr (&Sget_buffer); | |
6216 | defsubr (&Sget_file_buffer); | |
6217 | defsubr (&Sget_buffer_create); | |
336cd056 | 6218 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6219 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6220 | defsubr (&Sbuffer_name); |
6221 | /*defsubr (&Sbuffer_number);*/ | |
6222 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6223 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6224 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6225 | defsubr (&Sbuffer_local_variables); |
6226 | defsubr (&Sbuffer_modified_p); | |
6227 | defsubr (&Sset_buffer_modified_p); | |
6228 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6229 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6230 | defsubr (&Srename_buffer); |
6231 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6232 | defsubr (&Sbuffer_enable_undo); |
6233 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6234 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6235 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6236 | defsubr (&Scurrent_buffer); |
6237 | defsubr (&Sset_buffer); | |
6238 | defsubr (&Sbarf_if_buffer_read_only); | |
6239 | defsubr (&Sbury_buffer); | |
3ac81adb | 6240 | defsubr (&Serase_buffer); |
13cda5f9 | 6241 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6242 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6243 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6244 | |
52f8ec73 | 6245 | defsubr (&Soverlayp); |
2eec3b4e RS |
6246 | defsubr (&Smake_overlay); |
6247 | defsubr (&Sdelete_overlay); | |
6248 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6249 | defsubr (&Soverlay_start); |
6250 | defsubr (&Soverlay_end); | |
6251 | defsubr (&Soverlay_buffer); | |
6252 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6253 | defsubr (&Soverlays_at); |
74514898 | 6254 | defsubr (&Soverlays_in); |
2eec3b4e | 6255 | defsubr (&Snext_overlay_change); |
239c932b | 6256 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6257 | defsubr (&Soverlay_recenter); |
6258 | defsubr (&Soverlay_lists); | |
6259 | defsubr (&Soverlay_get); | |
6260 | defsubr (&Soverlay_put); | |
a8c21b48 | 6261 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6262 | } |
6263 | ||
dfcf069d | 6264 | void |
1ab256cb RM |
6265 | keys_of_buffer () |
6266 | { | |
6267 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6268 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6269 | |
6270 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6271 | initialized when that function gets called. */ | |
6272 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6273 | } |
6b61353c KH |
6274 | |
6275 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6276 | (do not change this comment) */ |