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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
73b0cd50 | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
1ab256cb RM |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 19 | |
68c45bf0 | 20 | #include <config.h> |
1ab256cb | 21 | |
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb | 24 | #include <sys/param.h> |
9dde47f5 | 25 | #include <errno.h> |
15e7873a | 26 | #include <stdio.h> |
d7306fe6 | 27 | #include <setjmp.h> |
dfcf069d | 28 | #include <unistd.h> |
7ee72033 | 29 | |
1ab256cb | 30 | #include "lisp.h" |
21cf4cf8 | 31 | #include "intervals.h" |
1ab256cb RM |
32 | #include "window.h" |
33 | #include "commands.h" | |
34 | #include "buffer.h" | |
8f348ed5 | 35 | #include "character.h" |
28e969dd | 36 | #include "region-cache.h" |
1ab256cb | 37 | #include "indent.h" |
d014bf88 | 38 | #include "blockinput.h" |
2538fae4 | 39 | #include "keyboard.h" |
e35f6ff7 | 40 | #include "keymap.h" |
08460cd4 | 41 | #include "frame.h" |
1ab256cb RM |
42 | |
43 | struct buffer *current_buffer; /* the current buffer */ | |
44 | ||
45 | /* First buffer in chain of all buffers (in reverse order of creation). | |
46 | Threaded through ->next. */ | |
47 | ||
48 | struct buffer *all_buffers; | |
49 | ||
50 | /* This structure holds the default values of the buffer-local variables | |
51 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
52 | The default value occupies the same slot in this structure | |
53 | as an individual buffer's value occupies in that buffer. | |
54 | Setting the default value also goes through the alist of buffers | |
55 | and stores into each buffer that does not say it has a local value. */ | |
56 | ||
6b61353c | 57 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
58 | |
59 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
60 | ||
61 | static Lisp_Object Vbuffer_defaults; | |
62 | ||
63 | /* This structure marks which slots in a buffer have corresponding | |
64 | default values in buffer_defaults. | |
65 | Each such slot has a nonzero value in this structure. | |
66 | The value has only one nonzero bit. | |
67 | ||
68 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
69 | the entry for that slot (found in the same slot in this structure) |
70 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
71 | |
72 | If a slot in this structure is -1, then even though there may | |
73 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
74 | and the corresponding slot in buffer_defaults is not used. | |
75 | ||
1ab256cb RM |
76 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
77 | zero, that is a bug */ | |
78 | ||
79 | struct buffer buffer_local_flags; | |
80 | ||
81 | /* This structure holds the names of symbols whose values may be | |
82 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
83 | ||
6b61353c KH |
84 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
85 | ||
1ab256cb RM |
86 | /* A Lisp_Object pointer to the above, used for staticpro */ |
87 | static Lisp_Object Vbuffer_local_symbols; | |
88 | ||
ce5b453a SM |
89 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
90 | the buffer structure. */ | |
91 | ||
92 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
93 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
94 | ||
13de9290 RS |
95 | /* Flags indicating which built-in buffer-local variables |
96 | are permanent locals. */ | |
7313acd0 | 97 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
98 | |
99 | /* Number of per-buffer variables used. */ | |
100 | ||
7313acd0 | 101 | int last_per_buffer_idx; |
13de9290 | 102 | |
f57e2426 J |
103 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
104 | int after, Lisp_Object arg1, | |
105 | Lisp_Object arg2, Lisp_Object arg3); | |
106 | static void swap_out_buffer_local_variables (struct buffer *b); | |
107 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
108 | |
109 | /* Alist of all buffer names vs the buffers. */ | |
110 | /* This used to be a variable, but is no longer, | |
111 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
112 | Lisp_Object Vbuffer_alist; | |
113 | ||
5b20caf0 | 114 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 115 | |
43ed3b8d | 116 | /* Hook run before changing a major mode. */ |
29208e82 | 117 | Lisp_Object Qchange_major_mode_hook; |
22378665 | 118 | |
dbc4e1c1 | 119 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
120 | Lisp_Object Qbefore_change_functions; |
121 | Lisp_Object Qafter_change_functions; | |
48265e61 | 122 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb RM |
123 | |
124 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
2f7a359d | 125 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
126 | |
127 | Lisp_Object Qprotected_field; | |
128 | ||
129 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
130 | ||
131 | Lisp_Object Qkill_buffer_hook; | |
132 | ||
5fe0b67e RS |
133 | Lisp_Object Qget_file_buffer; |
134 | ||
52f8ec73 JB |
135 | Lisp_Object Qoverlayp; |
136 | ||
2c09a58f | 137 | Lisp_Object Qpriority, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 138 | |
294d215f RS |
139 | Lisp_Object Qmodification_hooks; |
140 | Lisp_Object Qinsert_in_front_hooks; | |
141 | Lisp_Object Qinsert_behind_hooks; | |
142 | ||
f57e2426 J |
143 | static void alloc_buffer_text (struct buffer *, size_t); |
144 | static void free_buffer_text (struct buffer *b); | |
145 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
146 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
147 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 148 | |
1ab256cb RM |
149 | /* For debugging; temporary. See set_buffer_internal. */ |
150 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
151 | ||
01136e9b | 152 | void |
d3da34e0 | 153 | nsberror (Lisp_Object spec) |
1ab256cb | 154 | { |
a7a60ce9 | 155 | if (STRINGP (spec)) |
d5db4077 | 156 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
157 | error ("Invalid buffer argument"); |
158 | } | |
159 | \f | |
0dc88e60 | 160 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
161 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
162 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 163 | (Lisp_Object object) |
0dc88e60 | 164 | { |
4b4deea2 | 165 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
166 | ? Qt : Qnil); |
167 | } | |
168 | ||
08460cd4 | 169 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 170 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
171 | If the optional arg FRAME is a frame, we return the buffer list |
172 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
173 | frame parameter come first, followed by the rest of the buffers. */) | |
5842a27b | 174 | (Lisp_Object frame) |
1ab256cb | 175 | { |
a18b8cb5 | 176 | Lisp_Object general; |
08460cd4 RS |
177 | general = Fmapcar (Qcdr, Vbuffer_alist); |
178 | ||
179 | if (FRAMEP (frame)) | |
180 | { | |
a18b8cb5 KL |
181 | Lisp_Object framelist, prevlist, tail; |
182 | Lisp_Object args[3]; | |
08460cd4 | 183 | |
b7826503 | 184 | CHECK_FRAME (frame); |
08460cd4 RS |
185 | |
186 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 187 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 188 | |
a18b8cb5 KL |
189 | /* Remove from GENERAL any buffer that duplicates one in |
190 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 191 | tail = framelist; |
a18b8cb5 | 192 | while (CONSP (tail)) |
08460cd4 | 193 | { |
7539e11f KR |
194 | general = Fdelq (XCAR (tail), general); |
195 | tail = XCDR (tail); | |
08460cd4 | 196 | } |
a18b8cb5 KL |
197 | tail = prevlist; |
198 | while (CONSP (tail)) | |
199 | { | |
200 | general = Fdelq (XCAR (tail), general); | |
201 | tail = XCDR (tail); | |
202 | } | |
203 | ||
204 | args[0] = framelist; | |
205 | args[1] = general; | |
206 | args[2] = prevlist; | |
207 | return Fnconc (3, args); | |
08460cd4 RS |
208 | } |
209 | ||
210 | return general; | |
1ab256cb RM |
211 | } |
212 | ||
04ae1b48 RS |
213 | /* Like Fassoc, but use Fstring_equal to compare |
214 | (which ignores text properties), | |
215 | and don't ever QUIT. */ | |
216 | ||
217 | static Lisp_Object | |
d3da34e0 | 218 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
219 | { |
220 | register Lisp_Object tail; | |
6d70a280 | 221 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
222 | { |
223 | register Lisp_Object elt, tem; | |
6d70a280 | 224 | elt = XCAR (tail); |
04ae1b48 RS |
225 | tem = Fstring_equal (Fcar (elt), key); |
226 | if (!NILP (tem)) | |
227 | return elt; | |
228 | } | |
229 | return Qnil; | |
230 | } | |
231 | ||
1ab256cb | 232 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
233 | doc: /* Return the buffer named BUFFER-OR-NAME. |
234 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
235 | is a string and there is no buffer with that name, return nil. If | |
236 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 237 | (register Lisp_Object buffer_or_name) |
1ab256cb | 238 | { |
c8804c4f MR |
239 | if (BUFFERP (buffer_or_name)) |
240 | return buffer_or_name; | |
241 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 242 | |
c8804c4f | 243 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
244 | } |
245 | ||
246 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 247 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
248 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
249 | If there is no such live buffer, return nil. | |
7ee72033 | 250 | See also `find-buffer-visiting'. */) |
5842a27b | 251 | (register Lisp_Object filename) |
1ab256cb RM |
252 | { |
253 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
254 | Lisp_Object handler; |
255 | ||
b7826503 | 256 | CHECK_STRING (filename); |
1ab256cb RM |
257 | filename = Fexpand_file_name (filename, Qnil); |
258 | ||
5fe0b67e RS |
259 | /* If the file name has special constructs in it, |
260 | call the corresponding file handler. */ | |
a617e913 | 261 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
262 | if (!NILP (handler)) |
263 | return call2 (handler, Qget_file_buffer, filename); | |
264 | ||
7539e11f | 265 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 266 | { |
7539e11f | 267 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 268 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
269 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
270 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 271 | if (!NILP (tem)) |
1ab256cb RM |
272 | return buf; |
273 | } | |
274 | return Qnil; | |
275 | } | |
276 | ||
52e01189 | 277 | Lisp_Object |
d3da34e0 | 278 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
279 | { |
280 | register Lisp_Object tail, buf, tem; | |
281 | ||
7539e11f | 282 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 283 | { |
7539e11f | 284 | buf = Fcdr (XCAR (tail)); |
52e01189 | 285 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
286 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
287 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
288 | if (!NILP (tem)) |
289 | return buf; | |
290 | } | |
291 | return Qnil; | |
292 | } | |
293 | ||
1ab256cb RM |
294 | /* Incremented for each buffer created, to assign the buffer number. */ |
295 | int buffer_count; | |
296 | ||
297 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
298 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
299 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
300 | return that buffer. If no such buffer exists, create a new buffer with | |
301 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
302 | buffer does not keep undo information. | |
303 | ||
304 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
305 | even if it is dead. The return value is never nil. */) | |
5842a27b | 306 | (register Lisp_Object buffer_or_name) |
1ab256cb | 307 | { |
cd265ca6 | 308 | register Lisp_Object buffer, name; |
1ab256cb RM |
309 | register struct buffer *b; |
310 | ||
cd265ca6 MR |
311 | buffer = Fget_buffer (buffer_or_name); |
312 | if (!NILP (buffer)) | |
313 | return buffer; | |
1ab256cb | 314 | |
cd265ca6 | 315 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
316 | error ("Empty string for buffer name is not allowed"); |
317 | ||
cc648cef | 318 | b = allocate_buffer (); |
1ab256cb | 319 | |
336cd056 RS |
320 | /* An ordinary buffer uses its own struct buffer_text. */ |
321 | b->text = &b->own_text; | |
322 | b->base_buffer = 0; | |
323 | ||
1ab256cb | 324 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 325 | BLOCK_INPUT; |
3b06f880 KH |
326 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
327 | anchoring a search. */ | |
b86af064 | 328 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 329 | UNBLOCK_INPUT; |
1ab256cb | 330 | if (! BUF_BEG_ADDR (b)) |
81841847 | 331 | buffer_memory_full (); |
1ab256cb | 332 | |
cffc6f3b CY |
333 | b->pt = BEG; |
334 | b->begv = BEG; | |
335 | b->zv = BEG; | |
336 | b->pt_byte = BEG_BYTE; | |
337 | b->begv_byte = BEG_BYTE; | |
338 | b->zv_byte = BEG_BYTE; | |
339 | ||
6d70a280 | 340 | BUF_GPT (b) = BEG; |
6d70a280 | 341 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
342 | |
343 | BUF_Z (b) = BEG; | |
6d70a280 | 344 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 345 | BUF_MODIFF (b) = 1; |
3e145152 | 346 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 347 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
348 | BUF_SAVE_MODIFF (b) = 1; |
349 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
350 | BUF_UNCHANGED_MODIFIED (b) = 1; |
351 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
352 | BUF_END_UNCHANGED (b) = 0; | |
353 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 354 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 355 | |
28e969dd JB |
356 | b->newline_cache = 0; |
357 | b->width_run_cache = 0; | |
4b4deea2 | 358 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 359 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 360 | |
1ab256cb RM |
361 | /* Put this on the chain of all buffers including killed ones. */ |
362 | b->next = all_buffers; | |
363 | all_buffers = b; | |
364 | ||
336cd056 RS |
365 | /* An ordinary buffer normally doesn't need markers |
366 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
367 | BVAR (b, pt_marker) = Qnil; |
368 | BVAR (b, begv_marker) = Qnil; | |
369 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 370 | |
cd265ca6 | 371 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 372 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 373 | BVAR (b, name) = name; |
04ae1b48 | 374 | |
4b4deea2 | 375 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
376 | |
377 | reset_buffer (b); | |
13de9290 | 378 | reset_buffer_local_variables (b, 1); |
1ab256cb | 379 | |
4b4deea2 | 380 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 381 | BUF_MARKERS (b) = NULL; |
4b4deea2 | 382 | BVAR (b, name) = name; |
1f57cb74 | 383 | |
1ab256cb | 384 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
385 | XSETBUFFER (buffer, b); |
386 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 387 | |
2f064abf | 388 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
389 | can lead to infinite regress until you run out of stack. rms |
390 | says that's not worth protecting against. */ | |
48265e61 | 391 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
392 | /* buffer is on buffer-alist, so no gcpro. */ |
393 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 394 | |
cd265ca6 | 395 | return buffer; |
336cd056 RS |
396 | } |
397 | ||
7e9d5818 | 398 | |
04e4cb3a GM |
399 | /* Return a list of overlays which is a copy of the overlay list |
400 | LIST, but for buffer B. */ | |
401 | ||
2410d73a | 402 | static struct Lisp_Overlay * |
d3da34e0 | 403 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 404 | { |
2410d73a SM |
405 | Lisp_Object buffer; |
406 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
407 | |
408 | XSETBUFFER (buffer, b); | |
409 | ||
2410d73a | 410 | for (; list; list = list->next) |
04e4cb3a GM |
411 | { |
412 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 413 | EMACS_INT charpos; |
04e4cb3a | 414 | |
2410d73a | 415 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
416 | charpos = marker_position (OVERLAY_START (old_overlay)); |
417 | start = Fmake_marker (); | |
db3a49a6 | 418 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
419 | XMARKER (start)->insertion_type |
420 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
421 | ||
422 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
423 | end = Fmake_marker (); | |
db3a49a6 | 424 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
425 | XMARKER (end)->insertion_type |
426 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
427 | ||
428 | overlay = allocate_misc (); | |
429 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
430 | OVERLAY_START (overlay) = start; | |
431 | OVERLAY_END (overlay) = end; | |
432 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 433 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 434 | |
2410d73a SM |
435 | if (tail) |
436 | tail = tail->next = XOVERLAY (overlay); | |
437 | else | |
438 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
439 | } |
440 | ||
2410d73a | 441 | return result; |
04e4cb3a | 442 | } |
177c0ea7 | 443 | |
04e4cb3a | 444 | |
7e9d5818 GM |
445 | /* Clone per-buffer values of buffer FROM. |
446 | ||
447 | Buffer TO gets the same per-buffer values as FROM, with the | |
448 | following exceptions: (1) TO's name is left untouched, (2) markers | |
449 | are copied and made to refer to TO, and (3) overlay lists are | |
450 | copied. */ | |
451 | ||
452 | static void | |
d3da34e0 | 453 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 454 | { |
54622f33 | 455 | Lisp_Object to_buffer; |
7e9d5818 GM |
456 | int offset; |
457 | ||
458 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 459 | |
3ee24aec SM |
460 | /* buffer-local Lisp variables start at `undo_list', |
461 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 462 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
463 | offset < sizeof *to; |
464 | offset += sizeof (Lisp_Object)) | |
465 | { | |
466 | Lisp_Object obj; | |
467 | ||
4b7cdc0e SM |
468 | /* Don't touch the `name' which should be unique for every buffer. */ |
469 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
470 | continue; | |
471 | ||
7e9d5818 | 472 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 473 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
474 | { |
475 | struct Lisp_Marker *m = XMARKER (obj); | |
476 | obj = Fmake_marker (); | |
477 | XMARKER (obj)->insertion_type = m->insertion_type; | |
478 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
479 | } | |
480 | ||
481 | PER_BUFFER_VALUE (to, offset) = obj; | |
482 | } | |
483 | ||
72af86bd | 484 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 485 | |
04e4cb3a GM |
486 | to->overlays_before = copy_overlays (to, from->overlays_before); |
487 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 488 | |
e1688f54 RS |
489 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
490 | and install that in TO. */ | |
4b4deea2 | 491 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
492 | } |
493 | ||
cffc6f3b CY |
494 | |
495 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
496 | current, update these markers. */ | |
497 | ||
498 | static void | |
499 | record_buffer_markers (struct buffer *b) | |
500 | { | |
501 | if (! NILP (BVAR (b, pt_marker))) | |
502 | { | |
503 | Lisp_Object buffer; | |
504 | ||
505 | eassert (!NILP (BVAR (b, begv_marker))); | |
506 | eassert (!NILP (BVAR (b, zv_marker))); | |
507 | ||
508 | XSETBUFFER (buffer, b); | |
509 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
510 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
511 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
512 | } | |
513 | } | |
514 | ||
515 | ||
516 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
517 | current, fetch these values into B->begv etc. */ | |
518 | ||
519 | static void | |
520 | fetch_buffer_markers (struct buffer *b) | |
521 | { | |
522 | if (! NILP (BVAR (b, pt_marker))) | |
523 | { | |
524 | Lisp_Object m; | |
525 | ||
526 | eassert (!NILP (BVAR (b, begv_marker))); | |
527 | eassert (!NILP (BVAR (b, zv_marker))); | |
528 | ||
529 | m = BVAR (b, pt_marker); | |
530 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
531 | ||
532 | m = BVAR (b, begv_marker); | |
533 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
534 | ||
535 | m = BVAR (b, zv_marker); | |
536 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
537 | } | |
538 | } | |
539 | ||
540 | ||
7e9d5818 GM |
541 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
542 | 2, 3, | |
193c3837 | 543 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 544 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 545 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
546 | NAME should be a string which is not the name of an existing buffer. |
547 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
548 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 549 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 550 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 551 | { |
6b61353c | 552 | Lisp_Object buf, tem; |
7e9d5818 | 553 | struct buffer *b; |
336cd056 | 554 | |
6b61353c | 555 | CHECK_STRING (name); |
336cd056 RS |
556 | buf = Fget_buffer (name); |
557 | if (!NILP (buf)) | |
d5db4077 | 558 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 559 | |
6b61353c | 560 | tem = base_buffer; |
336cd056 RS |
561 | base_buffer = Fget_buffer (base_buffer); |
562 | if (NILP (base_buffer)) | |
6b61353c | 563 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 564 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 565 | error ("Base buffer has been killed"); |
336cd056 | 566 | |
d5db4077 | 567 | if (SCHARS (name) == 0) |
336cd056 RS |
568 | error ("Empty string for buffer name is not allowed"); |
569 | ||
cc648cef | 570 | b = allocate_buffer (); |
336cd056 | 571 | |
67ee9f6e SM |
572 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
573 | ? XBUFFER (base_buffer)->base_buffer | |
574 | : XBUFFER (base_buffer)); | |
336cd056 RS |
575 | |
576 | /* Use the base buffer's text object. */ | |
577 | b->text = b->base_buffer->text; | |
578 | ||
cffc6f3b CY |
579 | b->pt = b->base_buffer->pt; |
580 | b->begv = b->base_buffer->begv; | |
581 | b->zv = b->base_buffer->zv; | |
582 | b->pt_byte = b->base_buffer->pt_byte; | |
583 | b->begv_byte = b->base_buffer->begv_byte; | |
584 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
585 | |
586 | b->newline_cache = 0; | |
587 | b->width_run_cache = 0; | |
4b4deea2 | 588 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
589 | |
590 | /* Put this on the chain of all buffers including killed ones. */ | |
591 | b->next = all_buffers; | |
592 | all_buffers = b; | |
593 | ||
594 | name = Fcopy_sequence (name); | |
ab77f05c | 595 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 596 | BVAR (b, name) = name; |
336cd056 RS |
597 | |
598 | reset_buffer (b); | |
13de9290 | 599 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
600 | |
601 | /* Put this in the alist of all live buffers. */ | |
602 | XSETBUFFER (buf, b); | |
603 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
604 | ||
4b4deea2 TT |
605 | BVAR (b, mark) = Fmake_marker (); |
606 | BVAR (b, name) = name; | |
336cd056 | 607 | |
abc9d959 | 608 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 609 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 610 | |
336cd056 | 611 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 612 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 613 | { |
2aa46d6c CY |
614 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
615 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 616 | |
4b4deea2 TT |
617 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
618 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
cffc6f3b CY |
619 | b->base_buffer->pt, |
620 | b->base_buffer->pt_byte); | |
621 | ||
4b4deea2 TT |
622 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
623 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
cffc6f3b CY |
624 | b->base_buffer->begv, |
625 | b->base_buffer->begv_byte); | |
626 | ||
4b4deea2 TT |
627 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
628 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
cffc6f3b CY |
629 | b->base_buffer->zv, |
630 | b->base_buffer->zv_byte); | |
4b4deea2 | 631 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
632 | } |
633 | ||
7e9d5818 GM |
634 | if (NILP (clone)) |
635 | { | |
636 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 | 637 | BVAR (b, pt_marker) = Fmake_marker (); |
cffc6f3b | 638 | set_marker_both (BVAR (b, pt_marker), buf, b->pt, b->pt_byte); |
4b4deea2 | 639 | BVAR (b, begv_marker) = Fmake_marker (); |
cffc6f3b | 640 | set_marker_both (BVAR (b, begv_marker), buf, b->begv, b->begv_byte); |
4b4deea2 | 641 | BVAR (b, zv_marker) = Fmake_marker (); |
cffc6f3b | 642 | set_marker_both (BVAR (b, zv_marker), buf, b->zv, b->zv_byte); |
4b4deea2 | 643 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
644 | } |
645 | else | |
7fa57e45 RS |
646 | { |
647 | struct buffer *old_b = current_buffer; | |
648 | ||
649 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
650 | BVAR (b, filename) = Qnil; |
651 | BVAR (b, file_truename) = Qnil; | |
652 | BVAR (b, display_count) = make_number (0); | |
653 | BVAR (b, backed_up) = Qnil; | |
654 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
655 | set_buffer_internal_1 (b); |
656 | Fset (intern ("buffer-save-without-query"), Qnil); | |
657 | Fset (intern ("buffer-file-number"), Qnil); | |
658 | Fset (intern ("buffer-stale-function"), Qnil); | |
659 | set_buffer_internal_1 (old_b); | |
660 | } | |
336cd056 | 661 | |
a9ee7a59 | 662 | return buf; |
1ab256cb RM |
663 | } |
664 | ||
d4f5719a | 665 | void |
d3da34e0 | 666 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
667 | { |
668 | Lisp_Object overlay; | |
669 | ||
670 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
671 | have to empty the list, otherwise we end up with overlays that | |
672 | think they belong to this buffer while the buffer doesn't know about | |
673 | them any more. */ | |
674 | while (b->overlays_before) | |
675 | { | |
676 | XSETMISC (overlay, b->overlays_before); | |
677 | Fdelete_overlay (overlay); | |
678 | } | |
679 | while (b->overlays_after) | |
680 | { | |
681 | XSETMISC (overlay, b->overlays_after); | |
682 | Fdelete_overlay (overlay); | |
683 | } | |
684 | eassert (b->overlays_before == NULL); | |
685 | eassert (b->overlays_after == NULL); | |
686 | } | |
687 | ||
bcd40520 | 688 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 689 | and local variables. |
d4f5719a SM |
690 | If called on an already-initialized buffer, the list of overlays |
691 | should be deleted before calling this function, otherwise we end up | |
692 | with overlays that claim to belong to the buffer but the buffer | |
693 | claims it doesn't belong to it. */ | |
1ab256cb RM |
694 | |
695 | void | |
d3da34e0 | 696 | reset_buffer (register struct buffer *b) |
1ab256cb | 697 | { |
4b4deea2 TT |
698 | BVAR (b, filename) = Qnil; |
699 | BVAR (b, file_truename) = Qnil; | |
700 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 701 | b->modtime = 0; |
58b963f7 | 702 | b->modtime_size = -1; |
4b4deea2 | 703 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 704 | b->last_window_start = 1; |
8b264726 | 705 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
706 | b->clip_changed = 0; |
707 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 708 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 709 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 710 | b->auto_save_failure_time = -1; |
4b4deea2 TT |
711 | BVAR (b, auto_save_file_name) = Qnil; |
712 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
713 | b->overlays_before = NULL; |
714 | b->overlays_after = NULL; | |
c2d5b10f | 715 | b->overlay_center = BEG; |
4b4deea2 TT |
716 | BVAR (b, mark_active) = Qnil; |
717 | BVAR (b, point_before_scroll) = Qnil; | |
718 | BVAR (b, file_format) = Qnil; | |
719 | BVAR (b, auto_save_file_format) = Qt; | |
720 | BVAR (b, last_selected_window) = Qnil; | |
721 | XSETINT (BVAR (b, display_count), 0); | |
722 | BVAR (b, display_time) = Qnil; | |
723 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
724 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
725 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
726 | |
727 | b->display_error_modiff = 0; | |
1ab256cb RM |
728 | } |
729 | ||
bcd40520 RS |
730 | /* Reset buffer B's local variables info. |
731 | Don't use this on a buffer that has already been in use; | |
732 | it does not treat permanent locals consistently. | |
13de9290 RS |
733 | Instead, use Fkill_all_local_variables. |
734 | ||
3709505e | 735 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
736 | buffer-local variables. If PERMANENT_TOO is 0, |
737 | we preserve those. */ | |
bcd40520 | 738 | |
13de9290 | 739 | static void |
d3da34e0 | 740 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
741 | { |
742 | register int offset; | |
7c02e886 | 743 | int i; |
1ab256cb RM |
744 | |
745 | /* Reset the major mode to Fundamental, together with all the | |
746 | things that depend on the major mode. | |
747 | default-major-mode is handled at a higher level. | |
748 | We ignore it here. */ | |
4b4deea2 TT |
749 | BVAR (b, major_mode) = Qfundamental_mode; |
750 | BVAR (b, keymap) = Qnil; | |
751 | BVAR (b, mode_name) = QSFundamental; | |
752 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
753 | |
754 | /* If the standard case table has been altered and invalidated, | |
755 | fix up its insides first. */ | |
756 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
757 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
758 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
759 | Fset_standard_case_table (Vascii_downcase_table); | |
760 | ||
4b4deea2 TT |
761 | BVAR (b, downcase_table) = Vascii_downcase_table; |
762 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
763 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
764 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
765 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 766 | |
13de9290 | 767 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 768 | if (permanent_too) |
4b4deea2 | 769 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
770 | else |
771 | { | |
2f7a359d | 772 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 773 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 774 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
775 | { |
776 | /* If permanent-local, keep it. */ | |
777 | last = tmp; | |
778 | if (EQ (prop, Qpermanent_local_hook)) | |
779 | { | |
780 | /* This is a partially permanent hook variable. | |
781 | Preserve only the elements that want to be preserved. */ | |
782 | Lisp_Object list, newlist; | |
783 | list = XCDR (XCAR (tmp)); | |
784 | if (!CONSP (list)) | |
785 | newlist = list; | |
786 | else | |
787 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
788 | { | |
789 | Lisp_Object elt = XCAR (list); | |
790 | /* Preserve element ELT if it's t, | |
791 | if it is a function with a `permanent-local-hook' property, | |
792 | or if it's not a symbol. */ | |
793 | if (! SYMBOLP (elt) | |
794 | || EQ (elt, Qt) | |
795 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
796 | newlist = Fcons (elt, newlist); | |
797 | } | |
798 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
799 | } | |
800 | } | |
801 | /* Delete this local variable. */ | |
3709505e | 802 | else if (NILP (last)) |
4b4deea2 | 803 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
804 | else |
805 | XSETCDR (last, XCDR (tmp)); | |
806 | } | |
807 | ||
7313acd0 | 808 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 809 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 810 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
811 | |
812 | /* For each slot that has a default value, | |
813 | copy that into the slot. */ | |
814 | ||
3ee24aec SM |
815 | /* buffer-local Lisp variables start at `undo_list', |
816 | tho only the ones from `name' on are GC'd normally. */ | |
817 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
818 | offset < sizeof *b; |
819 | offset += sizeof (Lisp_Object)) | |
aab80822 | 820 | { |
7313acd0 | 821 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
822 | if ((idx > 0 |
823 | && (permanent_too | |
ce5b453a | 824 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 825 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 826 | } |
1ab256cb RM |
827 | } |
828 | ||
01050cb5 RM |
829 | /* We split this away from generate-new-buffer, because rename-buffer |
830 | and set-visited-file-name ought to be able to use this to really | |
831 | rename the buffer properly. */ | |
832 | ||
833 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 834 | 1, 2, 0, |
7ee72033 | 835 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
836 | If there is no live buffer named NAME, then return NAME. |
837 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 838 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
839 | Optional second argument IGNORE specifies a name that is okay to use (if |
840 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 841 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
842 | { |
843 | register Lisp_Object gentemp, tem; | |
844 | int count; | |
845 | char number[10]; | |
846 | ||
b7826503 | 847 | CHECK_STRING (name); |
1ab256cb | 848 | |
6b61353c KH |
849 | tem = Fstring_equal (name, ignore); |
850 | if (!NILP (tem)) | |
851 | return name; | |
1ab256cb | 852 | tem = Fget_buffer (name); |
265a9e55 | 853 | if (NILP (tem)) |
01050cb5 | 854 | return name; |
1ab256cb RM |
855 | |
856 | count = 1; | |
857 | while (1) | |
858 | { | |
859 | sprintf (number, "<%d>", ++count); | |
860 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 861 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
862 | if (!NILP (tem)) |
863 | return gentemp; | |
1ab256cb | 864 | tem = Fget_buffer (gentemp); |
265a9e55 | 865 | if (NILP (tem)) |
01050cb5 | 866 | return gentemp; |
1ab256cb RM |
867 | } |
868 | } | |
869 | ||
870 | \f | |
871 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 872 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
873 | BUFFER defaults to the current buffer. |
874 | Return nil if BUFFER has been killed. */) | |
5842a27b | 875 | (register Lisp_Object buffer) |
1ab256cb | 876 | { |
265a9e55 | 877 | if (NILP (buffer)) |
4b4deea2 | 878 | return BVAR (current_buffer, name); |
b7826503 | 879 | CHECK_BUFFER (buffer); |
4b4deea2 | 880 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
881 | } |
882 | ||
883 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
884 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
885 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 886 | (register Lisp_Object buffer) |
1ab256cb | 887 | { |
265a9e55 | 888 | if (NILP (buffer)) |
4b4deea2 | 889 | return BVAR (current_buffer, filename); |
b7826503 | 890 | CHECK_BUFFER (buffer); |
4b4deea2 | 891 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
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. */) | |
5842a27b | 899 | (register Lisp_Object buffer) |
336cd056 RS |
900 | { |
901 | struct buffer *base; | |
902 | Lisp_Object base_buffer; | |
903 | ||
904 | if (NILP (buffer)) | |
905 | base = current_buffer->base_buffer; | |
906 | else | |
907 | { | |
b7826503 | 908 | CHECK_BUFFER (buffer); |
336cd056 RS |
909 | base = XBUFFER (buffer)->base_buffer; |
910 | } | |
911 | ||
912 | if (! base) | |
913 | return Qnil; | |
914 | XSETBUFFER (base_buffer, base); | |
915 | return base_buffer; | |
916 | } | |
917 | ||
79aa712d | 918 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 919 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
920 | doc: /* Return the value of VARIABLE in BUFFER. |
921 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 922 | is the default binding of the variable. */) |
5842a27b | 923 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
924 | { |
925 | register struct buffer *buf; | |
926 | register Lisp_Object result; | |
ad97b375 | 927 | struct Lisp_Symbol *sym; |
79aa712d | 928 | |
5e2ad10b | 929 | CHECK_SYMBOL (variable); |
ae69175b | 930 | CHECK_BUFFER (buffer); |
79aa712d | 931 | buf = XBUFFER (buffer); |
ce5b453a | 932 | sym = XSYMBOL (variable); |
79aa712d | 933 | |
ce5b453a SM |
934 | start: |
935 | switch (sym->redirect) | |
f0bac7de | 936 | { |
ce5b453a SM |
937 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
938 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
939 | case SYMBOL_LOCALIZED: | |
940 | { /* Look in local_var_alist. */ | |
941 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
942 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 943 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
944 | if (!NILP (result)) |
945 | { | |
946 | if (blv->fwd) | |
947 | { /* What binding is loaded right now? */ | |
948 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 949 | |
ce5b453a SM |
950 | /* The value of the currently loaded binding is not |
951 | stored in it, but rather in the realvalue slot. | |
952 | Store that value into the binding it belongs to | |
953 | in case that is the one we are about to use. */ | |
f0bac7de | 954 | |
ce5b453a SM |
955 | XSETCDR (current_alist_element, |
956 | do_symval_forwarding (blv->fwd)); | |
957 | } | |
958 | /* Now get the (perhaps updated) value out of the binding. */ | |
959 | result = XCDR (result); | |
960 | } | |
961 | else | |
962 | result = Fdefault_value (variable); | |
963 | break; | |
964 | } | |
965 | case SYMBOL_FORWARDED: | |
966 | { | |
967 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
968 | if (BUFFER_OBJFWDP (fwd)) | |
969 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
970 | else | |
971 | result = Fdefault_value (variable); | |
972 | break; | |
973 | } | |
974 | default: abort (); | |
f0bac7de | 975 | } |
79aa712d | 976 | |
4c4dc0b0 KS |
977 | if (!EQ (result, Qunbound)) |
978 | return result; | |
79aa712d | 979 | |
4c4dc0b0 | 980 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
981 | } |
982 | ||
e1688f54 | 983 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 984 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
985 | in special slots in the buffer object. */ |
986 | ||
987 | static Lisp_Object | |
d3da34e0 | 988 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
989 | { |
990 | Lisp_Object result = Qnil; | |
991 | register Lisp_Object tail; | |
4b4deea2 | 992 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
993 | { |
994 | Lisp_Object val, elt; | |
995 | ||
996 | elt = XCAR (tail); | |
997 | ||
998 | /* Reference each variable in the alist in buf. | |
999 | If inquiring about the current buffer, this gets the current values, | |
1000 | so store them into the alist so the alist is up to date. | |
1001 | If inquiring about some other buffer, this swaps out any values | |
1002 | for that buffer, making the alist up to date automatically. */ | |
1003 | val = find_symbol_value (XCAR (elt)); | |
1004 | /* Use the current buffer value only if buf is the current buffer. */ | |
1005 | if (buf != current_buffer) | |
1006 | val = XCDR (elt); | |
1007 | ||
ce5b453a | 1008 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
1009 | } |
1010 | ||
1011 | return result; | |
1012 | } | |
1013 | ||
1ab256cb | 1014 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1015 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1016 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1017 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1018 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1019 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1020 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1021 | (register Lisp_Object buffer) |
1ab256cb RM |
1022 | { |
1023 | register struct buffer *buf; | |
553defa4 | 1024 | register Lisp_Object result; |
1ab256cb | 1025 | |
265a9e55 | 1026 | if (NILP (buffer)) |
1ab256cb RM |
1027 | buf = current_buffer; |
1028 | else | |
1029 | { | |
b7826503 | 1030 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1031 | buf = XBUFFER (buffer); |
1032 | } | |
1033 | ||
e1688f54 | 1034 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1035 | |
1ab256cb RM |
1036 | /* Add on all the variables stored in special slots. */ |
1037 | { | |
7c02e886 | 1038 | int offset, idx; |
1ab256cb | 1039 | |
3ee24aec SM |
1040 | /* buffer-local Lisp variables start at `undo_list', |
1041 | tho only the ones from `name' on are GC'd normally. */ | |
1042 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1043 | offset < sizeof (struct buffer); |
7c02e886 GM |
1044 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1045 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1046 | { |
7313acd0 GM |
1047 | idx = PER_BUFFER_IDX (offset); |
1048 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1049 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1050 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1051 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1052 | result); |
1ab256cb RM |
1053 | } |
1054 | } | |
553defa4 RS |
1055 | |
1056 | return result; | |
1ab256cb | 1057 | } |
1ab256cb RM |
1058 | \f |
1059 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1060 | 0, 1, 0, |
7ee72033 MB |
1061 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1062 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1063 | (register Lisp_Object buffer) |
1ab256cb RM |
1064 | { |
1065 | register struct buffer *buf; | |
265a9e55 | 1066 | if (NILP (buffer)) |
1ab256cb RM |
1067 | buf = current_buffer; |
1068 | else | |
1069 | { | |
b7826503 | 1070 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1071 | buf = XBUFFER (buffer); |
1072 | } | |
1073 | ||
336cd056 | 1074 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1075 | } |
1076 | ||
1077 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1078 | 1, 1, 0, |
7ee72033 MB |
1079 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1080 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1081 | (register Lisp_Object flag) |
1ab256cb RM |
1082 | { |
1083 | register int already; | |
1084 | register Lisp_Object fn; | |
8ec01c70 | 1085 | Lisp_Object buffer, window; |
1ab256cb RM |
1086 | |
1087 | #ifdef CLASH_DETECTION | |
1088 | /* If buffer becoming modified, lock the file. | |
1089 | If buffer becoming unmodified, unlock the file. */ | |
1090 | ||
4b4deea2 | 1091 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1092 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1093 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1094 | { |
336cd056 | 1095 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1096 | if (!already && !NILP (flag)) |
1ab256cb | 1097 | lock_file (fn); |
265a9e55 | 1098 | else if (already && NILP (flag)) |
1ab256cb RM |
1099 | unlock_file (fn); |
1100 | } | |
1101 | #endif /* CLASH_DETECTION */ | |
1102 | ||
0b5397c2 SM |
1103 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1104 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1105 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1106 | modify SAVE_MODIFF to affect one, we may affect the other | |
1107 | as well. | |
1108 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1109 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1110 | recent-auto-save-p from t to nil. | |
1111 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1112 | we risk changing recent-auto-save-p from nil to t. */ | |
1113 | SAVE_MODIFF = (NILP (flag) | |
1114 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1115 | ? MODIFF | |
1116 | /* Let's try to preserve recent-auto-save-p. */ | |
1117 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1118 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1119 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1120 | or increase MODIFF. */ | |
1121 | : MODIFF++); | |
177c0ea7 | 1122 | |
8ec01c70 GM |
1123 | /* Set update_mode_lines only if buffer is displayed in some window. |
1124 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1125 | state by recording/restoring the state around blocks of code. | |
1126 | Setting update_mode_lines makes redisplay consider all windows | |
1127 | (on all frames). Stealth fontification of buffers not displayed | |
1128 | would incur additional redisplay costs if we'd set | |
1129 | update_modes_lines unconditionally. | |
1130 | ||
1131 | Ideally, I think there should be another mechanism for fontifying | |
1132 | buffers without "modifying" buffers, or redisplay should be | |
1133 | smarter about updating the `*' in mode lines. --gerd */ | |
1134 | XSETBUFFER (buffer, current_buffer); | |
1135 | window = Fget_buffer_window (buffer, Qt); | |
1136 | if (WINDOWP (window)) | |
d57b83b3 GM |
1137 | { |
1138 | ++update_mode_lines; | |
1139 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1140 | } | |
177c0ea7 | 1141 | |
1ab256cb RM |
1142 | return flag; |
1143 | } | |
1144 | ||
a8c21b48 GM |
1145 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1146 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1147 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1148 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1149 | state of the current buffer. Use with care. */) |
5842a27b | 1150 | (Lisp_Object flag) |
a8c21b48 GM |
1151 | { |
1152 | #ifdef CLASH_DETECTION | |
1153 | Lisp_Object fn; | |
177c0ea7 | 1154 | |
a8c21b48 GM |
1155 | /* If buffer becoming modified, lock the file. |
1156 | If buffer becoming unmodified, unlock the file. */ | |
1157 | ||
4b4deea2 | 1158 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1159 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1160 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1161 | { |
1162 | int already = SAVE_MODIFF < MODIFF; | |
1163 | if (!already && !NILP (flag)) | |
1164 | lock_file (fn); | |
1165 | else if (already && NILP (flag)) | |
1166 | unlock_file (fn); | |
1167 | } | |
1168 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1169 | |
a8c21b48 GM |
1170 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1171 | return flag; | |
1172 | } | |
1173 | ||
1ab256cb | 1174 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1175 | 0, 1, 0, |
7ee72033 | 1176 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1177 | Each buffer has a tick counter which is incremented each time the |
1178 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1179 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1180 | (register Lisp_Object buffer) |
1ab256cb RM |
1181 | { |
1182 | register struct buffer *buf; | |
265a9e55 | 1183 | if (NILP (buffer)) |
1ab256cb RM |
1184 | buf = current_buffer; |
1185 | else | |
1186 | { | |
b7826503 | 1187 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1188 | buf = XBUFFER (buffer); |
1189 | } | |
1190 | ||
1191 | return make_number (BUF_MODIFF (buf)); | |
1192 | } | |
3e145152 CY |
1193 | |
1194 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1195 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1196 | doc: /* Return BUFFER's character-change tick counter. | |
1197 | Each buffer has a character-change tick counter, which is set to the | |
1198 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1199 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1200 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1201 | you can tell whether a character change occurred in that buffer in |
1202 | between these calls. No argument or nil as argument means use current | |
1203 | buffer as BUFFER. */) | |
5842a27b | 1204 | (register Lisp_Object buffer) |
3e145152 CY |
1205 | { |
1206 | register struct buffer *buf; | |
1207 | if (NILP (buffer)) | |
1208 | buf = current_buffer; | |
1209 | else | |
1210 | { | |
1211 | CHECK_BUFFER (buffer); | |
1212 | buf = XBUFFER (buffer); | |
1213 | } | |
1214 | ||
1215 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1216 | } | |
1ab256cb | 1217 | \f |
01050cb5 | 1218 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1219 | "(list (read-string \"Rename buffer (to new name): \" \ |
1220 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1221 | current-prefix-arg)", | |
7ee72033 | 1222 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1223 | If second arg UNIQUE is nil or omitted, it is an error if a |
1224 | buffer named NEWNAME already exists. | |
1225 | If UNIQUE is non-nil, come up with a new name using | |
1226 | `generate-new-buffer-name'. | |
1227 | Interactively, you can set UNIQUE with a prefix argument. | |
1228 | We return the name we actually gave the buffer. | |
7ee72033 | 1229 | This does not change the name of the visited file (if any). */) |
5842a27b | 1230 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1231 | { |
1232 | register Lisp_Object tem, buf; | |
1233 | ||
b7826503 | 1234 | CHECK_STRING (newname); |
d59698c4 | 1235 | |
d5db4077 | 1236 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1237 | error ("Empty string is invalid as a buffer name"); |
1238 | ||
489c043a | 1239 | tem = Fget_buffer (newname); |
265a9e55 | 1240 | if (!NILP (tem)) |
01050cb5 | 1241 | { |
8801a864 KR |
1242 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1243 | rename the buffer automatically so you can create another | |
1244 | with the original name. It makes UNIQUE equivalent to | |
1245 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1246 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1247 | return BVAR (current_buffer, name); |
3bd779aa | 1248 | if (!NILP (unique)) |
4b4deea2 | 1249 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1250 | else |
d5db4077 | 1251 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1252 | } |
1ab256cb | 1253 | |
4b4deea2 | 1254 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1255 | |
1256 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1257 | any windows displaying current_buffer will stay unchanged. */ | |
1258 | update_mode_lines++; | |
1259 | ||
67180c6a | 1260 | XSETBUFFER (buf, current_buffer); |
489c043a | 1261 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1262 | if (NILP (BVAR (current_buffer, filename)) |
1263 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1264 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c | 1265 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1266 | return BVAR (current_buffer, name); |
1ab256cb RM |
1267 | } |
1268 | ||
773fbdb9 | 1269 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1270 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1271 | Buffers not visible in windows are preferred to visible buffers, |
1272 | unless optional second argument VISIBLE-OK is non-nil. | |
1273 | If the optional third argument FRAME is non-nil, use that frame's | |
1274 | buffer list instead of the selected frame's buffer list. | |
1275 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 | 1276 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
5842a27b | 1277 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1278 | { |
d3da34e0 | 1279 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
7962a441 | 1280 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1281 | notsogood = Qnil; |
1282 | ||
773fbdb9 | 1283 | if (NILP (frame)) |
9ba9623d | 1284 | frame = selected_frame; |
773fbdb9 | 1285 | |
d234d13e JL |
1286 | CHECK_FRAME (frame); |
1287 | ||
7962a441 | 1288 | tail = Vbuffer_alist; |
773fbdb9 | 1289 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1290 | |
1291 | /* Consider buffers that have been seen in the selected frame | |
1292 | before other buffers. */ | |
177c0ea7 | 1293 | |
773fbdb9 | 1294 | tem = frame_buffer_list (frame); |
7962a441 RS |
1295 | add_ons = Qnil; |
1296 | while (CONSP (tem)) | |
1297 | { | |
7539e11f KR |
1298 | if (BUFFERP (XCAR (tem))) |
1299 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1300 | tem = XCDR (tem); | |
7962a441 RS |
1301 | } |
1302 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1303 | ||
6d70a280 | 1304 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1305 | { |
6d70a280 | 1306 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1307 | if (EQ (buf, buffer)) |
1308 | continue; | |
6b61353c KH |
1309 | if (NILP (buf)) |
1310 | continue; | |
4b4deea2 | 1311 | if (NILP (BVAR (XBUFFER (buf), name))) |
6b61353c | 1312 | continue; |
4b4deea2 | 1313 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
1ab256cb | 1314 | continue; |
04ae1b48 RS |
1315 | /* If the selected frame has a buffer_predicate, |
1316 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1317 | if (!NILP (pred)) |
04ae1b48 | 1318 | { |
7962a441 | 1319 | tem = call1 (pred, buf); |
04ae1b48 RS |
1320 | if (NILP (tem)) |
1321 | continue; | |
1322 | } | |
04ae1b48 | 1323 | |
a0ebb746 | 1324 | if (NILP (visible_ok)) |
66ffe51c | 1325 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1326 | else |
1327 | tem = Qnil; | |
265a9e55 | 1328 | if (NILP (tem)) |
1ab256cb | 1329 | return buf; |
265a9e55 | 1330 | if (NILP (notsogood)) |
1ab256cb RM |
1331 | notsogood = buf; |
1332 | } | |
265a9e55 | 1333 | if (!NILP (notsogood)) |
1ab256cb | 1334 | return notsogood; |
dba1a30a GM |
1335 | buf = Fget_buffer (build_string ("*scratch*")); |
1336 | if (NILP (buf)) | |
1337 | { | |
1338 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1339 | Fset_buffer_major_mode (buf); | |
1340 | } | |
89132f25 | 1341 | return buf; |
1ab256cb RM |
1342 | } |
1343 | \f | |
1ab256cb RM |
1344 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1345 | 0, 1, "", | |
7ee72033 MB |
1346 | doc: /* Start keeping undo information for buffer BUFFER. |
1347 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1348 | (register Lisp_Object buffer) |
1ab256cb | 1349 | { |
ffd56f97 | 1350 | Lisp_Object real_buffer; |
1ab256cb | 1351 | |
ffd56f97 | 1352 | if (NILP (buffer)) |
67180c6a | 1353 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1354 | else |
1355 | { | |
ffd56f97 JB |
1356 | real_buffer = Fget_buffer (buffer); |
1357 | if (NILP (real_buffer)) | |
1358 | nsberror (buffer); | |
1ab256cb RM |
1359 | } |
1360 | ||
4b4deea2 TT |
1361 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1362 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1363 | |
1364 | return Qnil; | |
1365 | } | |
1366 | ||
1367 | /* | |
00b3c7ac | 1368 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1369 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1370 | The buffer being killed will be current while the hook is running.\n\ | |
1371 | See `kill-buffer'." | |
1372 | */ | |
c8804c4f MR |
1373 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1374 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1375 | The argument may be a buffer or the name of an existing buffer. | |
1376 | Argument nil or omitted means kill the current buffer. Return t if the | |
1377 | buffer is actually killed, nil otherwise. | |
1378 | ||
1379 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1380 | windows currently displaying the buffer to be killed. The functions in | |
1381 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1382 | the current buffer. If any of them returns nil, the buffer is not | |
1383 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1384 | actually killed. The buffer being killed will be current while the hook | |
1385 | is running. | |
018ba359 PJ |
1386 | |
1387 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1388 | with SIGHUP. */) |
5842a27b | 1389 | (Lisp_Object buffer_or_name) |
1ab256cb | 1390 | { |
c8804c4f | 1391 | Lisp_Object buffer; |
1ab256cb RM |
1392 | register struct buffer *b; |
1393 | register Lisp_Object tem; | |
1394 | register struct Lisp_Marker *m; | |
6af718a4 | 1395 | struct gcpro gcpro1; |
1ab256cb | 1396 | |
c8804c4f MR |
1397 | if (NILP (buffer_or_name)) |
1398 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1399 | else |
c8804c4f MR |
1400 | buffer = Fget_buffer (buffer_or_name); |
1401 | if (NILP (buffer)) | |
1402 | nsberror (buffer_or_name); | |
1ab256cb | 1403 | |
c8804c4f | 1404 | b = XBUFFER (buffer); |
1ab256cb | 1405 | |
4a4a9db5 | 1406 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1407 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1408 | return Qnil; |
1409 | ||
1ab256cb | 1410 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1411 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1412 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1413 | { |
c8804c4f | 1414 | GCPRO1 (buffer); |
5c4930b0 | 1415 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1416 | BVAR (b, name), make_number (0))); |
1ab256cb | 1417 | UNGCPRO; |
265a9e55 | 1418 | if (NILP (tem)) |
1ab256cb RM |
1419 | return Qnil; |
1420 | } | |
1421 | ||
dcdffbf6 | 1422 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1423 | { |
aed13378 | 1424 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1425 | Lisp_Object arglist[1]; |
1ab256cb RM |
1426 | |
1427 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1428 | set_buffer_internal (b); | |
dcdffbf6 RS |
1429 | |
1430 | /* First run the query functions; if any query is answered no, | |
1431 | don't kill the buffer. */ | |
5b20caf0 | 1432 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1433 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1434 | if (NILP (tem)) | |
5b20caf0 | 1435 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1436 | |
1437 | /* Then run the hooks. */ | |
f1597a3a | 1438 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1439 | unbind_to (count, Qnil); |
1440 | } | |
1441 | ||
1442 | /* We have no more questions to ask. Verify that it is valid | |
1443 | to kill the buffer. This must be done after the questions | |
1444 | since anything can happen within do_yes_or_no_p. */ | |
1445 | ||
1446 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1447 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1448 | return Qnil; |
1449 | ||
4b4deea2 | 1450 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1451 | return Qnil; |
1452 | ||
336cd056 RS |
1453 | /* When we kill a base buffer, kill all its indirect buffers. |
1454 | We do it at this stage so nothing terrible happens if they | |
1455 | ask questions or their hooks get errors. */ | |
1456 | if (! b->base_buffer) | |
1457 | { | |
1458 | struct buffer *other; | |
1459 | ||
c8804c4f | 1460 | GCPRO1 (buffer); |
336cd056 RS |
1461 | |
1462 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1463 | /* all_buffers contains dead buffers too; |
1464 | don't re-kill them. */ | |
4b4deea2 | 1465 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1466 | { |
8f54f30a PE |
1467 | Lisp_Object buf; |
1468 | XSETBUFFER (buf, other); | |
1469 | Fkill_buffer (buf); | |
336cd056 RS |
1470 | } |
1471 | ||
1472 | UNGCPRO; | |
1473 | } | |
177c0ea7 | 1474 | |
1ab256cb RM |
1475 | /* Make this buffer not be current. |
1476 | In the process, notice if this is the sole visible buffer | |
1477 | and give up if so. */ | |
1478 | if (b == current_buffer) | |
1479 | { | |
c8804c4f | 1480 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1481 | Fset_buffer (tem); |
1482 | if (b == current_buffer) | |
1483 | return Qnil; | |
1484 | } | |
1485 | ||
77270fac GM |
1486 | /* Notice if the buffer to kill is the sole visible buffer |
1487 | when we're currently in the mini-buffer, and give up if so. */ | |
1488 | XSETBUFFER (tem, current_buffer); | |
1489 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1490 | { | |
c8804c4f MR |
1491 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1492 | if (EQ (buffer, tem)) | |
77270fac GM |
1493 | return Qnil; |
1494 | } | |
1495 | ||
1ab256cb RM |
1496 | /* Now there is no question: we can kill the buffer. */ |
1497 | ||
1498 | #ifdef CLASH_DETECTION | |
1499 | /* Unlock this buffer's file, if it is locked. */ | |
1500 | unlock_buffer (b); | |
1501 | #endif /* CLASH_DETECTION */ | |
1502 | ||
c8804c4f MR |
1503 | GCPRO1 (buffer); |
1504 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1505 | UNGCPRO; |
1506 | ||
1507 | /* Killing buffer processes may run sentinels which may | |
1508 | have called kill-buffer. */ | |
1509 | ||
4b4deea2 | 1510 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1511 | return Qnil; |
1512 | ||
b93fb365 | 1513 | clear_charpos_cache (b); |
1ab256cb RM |
1514 | |
1515 | tem = Vinhibit_quit; | |
1516 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1517 | replace_buffer_in_all_windows (buffer); |
1518 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1519 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1520 | Vinhibit_quit = tem; |
1521 | ||
9cf712eb RS |
1522 | /* Delete any auto-save file, if we saved it in this session. |
1523 | But not if the buffer is modified. */ | |
4b4deea2 | 1524 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1525 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1526 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1527 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1528 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1529 | { |
8f54f30a PE |
1530 | Lisp_Object delete; |
1531 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1532 | if (! NILP (delete)) | |
4b4deea2 | 1533 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1534 | } |
1535 | ||
4a4a9db5 KH |
1536 | if (b->base_buffer) |
1537 | { | |
1538 | /* Unchain all markers that belong to this indirect buffer. | |
1539 | Don't unchain the markers that belong to the base buffer | |
1540 | or its other indirect buffers. */ | |
65745fad | 1541 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1542 | { |
65745fad | 1543 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1544 | if (m->buffer == b) |
65745fad SM |
1545 | unchain_marker (m); |
1546 | m = next; | |
4a4a9db5 KH |
1547 | } |
1548 | } | |
1549 | else | |
1ab256cb | 1550 | { |
4a4a9db5 | 1551 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1552 | and leave them pointing nowhere. */ |
65745fad | 1553 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1554 | { |
65745fad | 1555 | struct Lisp_Marker *next = m->next; |
336cd056 | 1556 | m->buffer = 0; |
65745fad SM |
1557 | m->next = NULL; |
1558 | m = next; | |
336cd056 | 1559 | } |
65745fad | 1560 | BUF_MARKERS (b) = NULL; |
336cd056 | 1561 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1562 | |
1563 | /* Perhaps we should explicitly free the interval tree here... */ | |
1564 | } | |
33f7013e | 1565 | |
2f3f993b RS |
1566 | /* Reset the local variables, so that this buffer's local values |
1567 | won't be protected from GC. They would be protected | |
1568 | if they happened to remain encached in their symbols. | |
1569 | This gets rid of them for certain. */ | |
1570 | swap_out_buffer_local_variables (b); | |
13de9290 | 1571 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1572 | |
4b4deea2 | 1573 | BVAR (b, name) = Qnil; |
336cd056 | 1574 | |
9ac0d9e0 | 1575 | BLOCK_INPUT; |
336cd056 | 1576 | if (! b->base_buffer) |
b86af064 | 1577 | free_buffer_text (b); |
336cd056 | 1578 | |
28e969dd JB |
1579 | if (b->newline_cache) |
1580 | { | |
1581 | free_region_cache (b->newline_cache); | |
1582 | b->newline_cache = 0; | |
1583 | } | |
1584 | if (b->width_run_cache) | |
1585 | { | |
1586 | free_region_cache (b->width_run_cache); | |
1587 | b->width_run_cache = 0; | |
1588 | } | |
4b4deea2 | 1589 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1590 | UNBLOCK_INPUT; |
4b4deea2 | 1591 | BVAR (b, undo_list) = Qnil; |
1ab256cb RM |
1592 | |
1593 | return Qt; | |
1594 | } | |
1595 | \f | |
36a8c287 JB |
1596 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1597 | we do this each time BUF is selected visibly, the more recently | |
1598 | selected buffers are always closer to the front of the list. This | |
1599 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1600 | |
01136e9b | 1601 | void |
d3da34e0 | 1602 | record_buffer (Lisp_Object buf) |
1ab256cb | 1603 | { |
8f54f30a | 1604 | register Lisp_Object list, prev; |
773fbdb9 | 1605 | Lisp_Object frame; |
9ba9623d | 1606 | frame = selected_frame; |
1ab256cb RM |
1607 | |
1608 | prev = Qnil; | |
8f54f30a | 1609 | for (list = Vbuffer_alist; CONSP (list); list = XCDR (list)) |
1ab256cb | 1610 | { |
8f54f30a | 1611 | if (EQ (XCDR (XCAR (list)), buf)) |
1ab256cb | 1612 | break; |
8f54f30a | 1613 | prev = list; |
1ab256cb RM |
1614 | } |
1615 | ||
8f54f30a | 1616 | /* Effectively do Vbuffer_alist = Fdelq (list, Vbuffer_alist); |
36a8c287 | 1617 | we cannot use Fdelq itself here because it allows quitting. */ |
1ab256cb | 1618 | |
265a9e55 | 1619 | if (NILP (prev)) |
7539e11f | 1620 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1621 | else |
f3fbd155 | 1622 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1623 | |
8f54f30a PE |
1624 | XSETCDR (list, Vbuffer_alist); |
1625 | Vbuffer_alist = list; | |
7962a441 | 1626 | |
a18b8cb5 | 1627 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1628 | |
a18b8cb5 | 1629 | prev = Qnil; |
8f54f30a PE |
1630 | for (list = XFRAME (frame)->buried_buffer_list; CONSP (list); |
1631 | list = XCDR (list)) | |
a18b8cb5 | 1632 | { |
8f54f30a | 1633 | if (EQ (XCAR (list), buf)) |
a18b8cb5 KL |
1634 | { |
1635 | if (NILP (prev)) | |
8f54f30a | 1636 | XFRAME (frame)->buried_buffer_list = XCDR (list); |
a18b8cb5 KL |
1637 | else |
1638 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1639 | break; | |
1640 | } | |
8f54f30a | 1641 | prev = list; |
a18b8cb5 KL |
1642 | } |
1643 | ||
7962a441 RS |
1644 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1645 | ||
1646 | prev = Qnil; | |
8f54f30a PE |
1647 | for (list = frame_buffer_list (frame); CONSP (list); |
1648 | list = XCDR (list)) | |
7962a441 | 1649 | { |
8f54f30a | 1650 | if (EQ (XCAR (list), buf)) |
7962a441 | 1651 | break; |
8f54f30a | 1652 | prev = list; |
7962a441 RS |
1653 | } |
1654 | ||
1655 | /* Effectively do delq. */ | |
1656 | ||
8f54f30a | 1657 | if (CONSP (list)) |
7962a441 RS |
1658 | { |
1659 | if (NILP (prev)) | |
773fbdb9 | 1660 | set_frame_buffer_list (frame, |
7539e11f | 1661 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1662 | else |
f3fbd155 | 1663 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1664 | |
8f54f30a PE |
1665 | XSETCDR (list, frame_buffer_list (frame)); |
1666 | set_frame_buffer_list (frame, list); | |
7962a441 RS |
1667 | } |
1668 | else | |
773fbdb9 | 1669 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1670 | } |
1671 | ||
a9ee7a59 | 1672 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1673 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1674 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1675 | according to `default-major-mode'. |
018ba359 | 1676 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1677 | the current buffer's major mode. */) |
5842a27b | 1678 | (Lisp_Object buffer) |
a9ee7a59 KH |
1679 | { |
1680 | int count; | |
1681 | Lisp_Object function; | |
1682 | ||
ea4fddd8 JB |
1683 | CHECK_BUFFER (buffer); |
1684 | ||
4b4deea2 TT |
1685 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1686 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1687 | function = find_symbol_value (intern ("initial-major-mode")); |
1688 | else | |
1689 | { | |
4b4deea2 | 1690 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1691 | if (NILP (function) |
4b4deea2 TT |
1692 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1693 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1694 | } |
177c0ea7 | 1695 | |
48265e61 DL |
1696 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1697 | return Qnil; | |
1698 | ||
aed13378 | 1699 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1700 | |
48265e61 DL |
1701 | /* To select a nonfundamental mode, |
1702 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1703 | |
1704 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1705 | ||
a2428fa2 | 1706 | Fset_buffer (buffer); |
48265e61 | 1707 | call0 (function); |
a9ee7a59 KH |
1708 | |
1709 | return unbind_to (count, Qnil); | |
1710 | } | |
1711 | ||
2594e0fd RS |
1712 | /* Switch to buffer BUFFER in the selected window. |
1713 | If NORECORD is non-nil, don't call record_buffer. */ | |
1714 | ||
c3bd59b5 | 1715 | static Lisp_Object |
d3da34e0 | 1716 | switch_to_buffer_1 (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1717 | { |
c8804c4f | 1718 | register Lisp_Object buffer; |
1ab256cb | 1719 | |
c8804c4f MR |
1720 | if (NILP (buffer_or_name)) |
1721 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1722 | else |
a9ee7a59 | 1723 | { |
c8804c4f MR |
1724 | buffer = Fget_buffer (buffer_or_name); |
1725 | if (NILP (buffer)) | |
a9ee7a59 | 1726 | { |
c8804c4f MR |
1727 | buffer = Fget_buffer_create (buffer_or_name); |
1728 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1729 | } |
1730 | } | |
c8804c4f | 1731 | Fset_buffer (buffer); |
265a9e55 | 1732 | if (NILP (norecord)) |
c8804c4f | 1733 | record_buffer (buffer); |
1ab256cb RM |
1734 | |
1735 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1736 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1737 | : selected_window, | |
c8804c4f | 1738 | buffer, Qnil); |
1ab256cb | 1739 | |
c8804c4f | 1740 | return buffer; |
1ab256cb RM |
1741 | } |
1742 | ||
88970542 JL |
1743 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1744 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1745 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1746 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1747 | nil. Return the buffer switched to. | |
a6dced2a | 1748 | |
ee50ff07 MR |
1749 | If BUFFER-OR-NAME is a string and does not identify an existing |
1750 | buffer, create a new buffer with that name. Interactively, if | |
1751 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1752 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1753 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1754 | |
ee50ff07 MR |
1755 | Optional second arg NORECORD non-nil means do not put this buffer |
1756 | at the front of the list of recently selected ones. This | |
1757 | function returns the buffer it switched to as a Lisp object. | |
1758 | ||
1759 | If the selected window is the minibuffer window or dedicated to | |
1760 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1761 | |
1762 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1763 | within a Lisp program! Use `set-buffer' instead. That avoids |
1764 | messing with the window-buffer correspondences. */) | |
5842a27b | 1765 | (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1766 | { |
c8804c4f | 1767 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1768 | { |
611ac521 RS |
1769 | /* Basically a NOP. Avoid signalling an error in the case where |
1770 | the selected window is dedicated, or a minibuffer. */ | |
1771 | ||
c8804c4f MR |
1772 | /* But do put this buffer at the front of the buffer list, unless |
1773 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1774 | at the front of the main buffer-list already, we still want to | |
1775 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1776 | if (NILP (norecord)) |
c8804c4f MR |
1777 | record_buffer (buffer_or_name); |
1778 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1779 | } |
61313fa3 SM |
1780 | else if (EQ (minibuf_window, selected_window) |
1781 | /* If `dedicated' is neither nil nor t, it means it's | |
1782 | dedicatedness can be overridden by an explicit request | |
1783 | such as a call to switch-to-buffer. */ | |
1784 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1785 | /* We can't use the selected window so let `pop-to-buffer' try some |
1786 | other window. */ | |
1787 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1788 | else | |
1789 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1790 | } |
1791 | ||
1ab256cb | 1792 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1793 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1794 | (void) |
1ab256cb RM |
1795 | { |
1796 | register Lisp_Object buf; | |
67180c6a | 1797 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1798 | return buf; |
1799 | } | |
1800 | \f | |
7ec44ec6 GM |
1801 | /* Set the current buffer to B. |
1802 | ||
1803 | We previously set windows_or_buffers_changed here to invalidate | |
1804 | global unchanged information in beg_unchanged and end_unchanged. | |
1805 | This is no longer necessary because we now compute unchanged | |
1806 | information on a buffer-basis. Every action affecting other | |
1807 | windows than the selected one requires a select_window at some | |
1808 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1809 | |
1810 | void | |
d3da34e0 | 1811 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1812 | { |
b5a225b4 | 1813 | if (current_buffer != b) |
7ec44ec6 | 1814 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1815 | } |
1816 | ||
1817 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1818 | This is used by redisplay. */ | |
1819 | ||
1820 | void | |
d3da34e0 | 1821 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1822 | { |
1823 | register struct buffer *old_buf; | |
ce5b453a | 1824 | register Lisp_Object tail; |
c7aa5005 | 1825 | |
b86af064 | 1826 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1827 | if (b->text->beg == NULL) |
b86af064 GM |
1828 | enlarge_buffer_text (b, 0); |
1829 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1830 | |
c7aa5005 KH |
1831 | if (current_buffer == b) |
1832 | return; | |
1833 | ||
1ab256cb RM |
1834 | old_buf = current_buffer; |
1835 | current_buffer = b; | |
1836 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1837 | ||
336cd056 RS |
1838 | if (old_buf) |
1839 | { | |
1840 | /* Put the undo list back in the base buffer, so that it appears | |
1841 | that an indirect buffer shares the undo list of its base. */ | |
1842 | if (old_buf->base_buffer) | |
4b4deea2 | 1843 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1844 | |
1845 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1846 | when it is not current, update them now. */ | |
cffc6f3b | 1847 | record_buffer_markers (old_buf); |
336cd056 RS |
1848 | } |
1849 | ||
1850 | /* Get the undo list from the base buffer, so that it appears | |
1851 | that an indirect buffer shares the undo list of its base. */ | |
1852 | if (b->base_buffer) | |
4b4deea2 | 1853 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1854 | |
1855 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1856 | when it is not current, fetch them now. */ | |
cffc6f3b | 1857 | fetch_buffer_markers (b); |
336cd056 | 1858 | |
1ab256cb RM |
1859 | /* Look down buffer's list of local Lisp variables |
1860 | to find and update any that forward into C variables. */ | |
1861 | ||
ce5b453a | 1862 | do |
1ab256cb | 1863 | { |
4b4deea2 | 1864 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1865 | { |
1866 | Lisp_Object var = XCAR (XCAR (tail)); | |
1867 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1868 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1869 | && SYMBOL_BLV (sym)->fwd) | |
1870 | /* Just reference the variable | |
1871 | to cause it to become set for this buffer. */ | |
1872 | Fsymbol_value (var); | |
1873 | } | |
1ab256cb | 1874 | } |
1ab256cb | 1875 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1876 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1877 | } |
1878 | ||
336cd056 | 1879 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1880 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1881 | |
1882 | void | |
d3da34e0 | 1883 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1884 | { |
1885 | register struct buffer *old_buf; | |
1886 | ||
1887 | if (current_buffer == b) | |
1888 | return; | |
1889 | ||
1890 | old_buf = current_buffer; | |
1891 | current_buffer = b; | |
1892 | ||
cffc6f3b CY |
1893 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1894 | when it is not current, update them now. */ | |
1895 | record_buffer_markers (old_buf); | |
336cd056 RS |
1896 | |
1897 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1898 | when it is not current, fetch them now. */ | |
cffc6f3b | 1899 | fetch_buffer_markers (b); |
336cd056 RS |
1900 | } |
1901 | ||
1ab256cb | 1902 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1903 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1904 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1905 | also `save-excursion' when you want to make a buffer current | |
1906 | temporarily. This function does not display the buffer, so its effect | |
1907 | ends when the current command terminates. Use `switch-to-buffer' or | |
1908 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1909 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1910 | { |
c8804c4f MR |
1911 | register Lisp_Object buffer; |
1912 | buffer = Fget_buffer (buffer_or_name); | |
1913 | if (NILP (buffer)) | |
1914 | nsberror (buffer_or_name); | |
4b4deea2 | 1915 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1916 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1917 | set_buffer_internal (XBUFFER (buffer)); |
1918 | return buffer; | |
1ab256cb | 1919 | } |
d0628b06 RS |
1920 | |
1921 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1922 | ||
1923 | Lisp_Object | |
d3da34e0 | 1924 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1925 | { |
4b4deea2 | 1926 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1927 | Fset_buffer (buffer); |
1928 | return Qnil; | |
1929 | } | |
1ab256cb RM |
1930 | \f |
1931 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1932 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 | 1933 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1934 | (void) |
1ab256cb | 1935 | { |
4b4deea2 | 1936 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1937 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1938 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1939 | return Qnil; |
1940 | } | |
1941 | ||
1942 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 1943 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 1944 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
1945 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
1946 | default. | |
1947 | ||
1948 | The argument may be a buffer name or an actual buffer object. If | |
1949 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
1950 | from the selected window if it is displayed there. If the selected |
1951 | window is dedicated to its buffer, delete that window if there are other | |
1952 | windows on the same frame. If the selected window is the only window on | |
1953 | its frame, iconify that frame. */) | |
5842a27b | 1954 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1955 | { |
c8804c4f MR |
1956 | Lisp_Object buffer; |
1957 | ||
b271272a | 1958 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 1959 | if (NILP (buffer_or_name)) |
a5611885 | 1960 | { |
c58dab63 | 1961 | Lisp_Object tem; |
a2428fa2 | 1962 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1963 | |
c58dab63 | 1964 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1965 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1966 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1967 | { |
1968 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1969 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1970 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1971 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1972 | else | |
1973 | Fdelete_window (selected_window); | |
1974 | } | |
a5611885 | 1975 | } |
1ab256cb RM |
1976 | else |
1977 | { | |
c8804c4f MR |
1978 | buffer = Fget_buffer (buffer_or_name); |
1979 | if (NILP (buffer)) | |
1980 | nsberror (buffer_or_name); | |
b271272a JB |
1981 | } |
1982 | ||
a1a8b28e GM |
1983 | /* Move buffer to the end of the buffer list. Do nothing if the |
1984 | buffer is killed. */ | |
4b4deea2 | 1985 | if (!NILP (BVAR (XBUFFER (buffer), name))) |
a1a8b28e | 1986 | { |
8f54f30a | 1987 | Lisp_Object aelt, list; |
b271272a | 1988 | |
a1a8b28e | 1989 | aelt = Frassq (buffer, Vbuffer_alist); |
8f54f30a | 1990 | list = Fmemq (aelt, Vbuffer_alist); |
a1a8b28e | 1991 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
8f54f30a PE |
1992 | XSETCDR (list, Qnil); |
1993 | Vbuffer_alist = nconc2 (Vbuffer_alist, list); | |
1ab256cb | 1994 | |
a18b8cb5 KL |
1995 | XFRAME (selected_frame)->buffer_list |
1996 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
1997 | XFRAME (selected_frame)->buried_buffer_list | |
1998 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 1999 | } |
dec989eb | 2000 | |
1ab256cb RM |
2001 | return Qnil; |
2002 | } | |
2003 | \f | |
c922bc55 | 2004 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2005 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2006 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2007 | so the buffer is truly empty after this. */) |
5842a27b | 2008 | (void) |
1ab256cb RM |
2009 | { |
2010 | Fwiden (); | |
c0d9a0c3 GM |
2011 | |
2012 | del_range (BEG, Z); | |
c280bc6a | 2013 | |
1ab256cb RM |
2014 | current_buffer->last_window_start = 1; |
2015 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2016 | if future size is less than past size. Use of erase-buffer | |
2017 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2018 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2019 | return Qnil; |
2020 | } | |
2021 | ||
01136e9b | 2022 | void |
d3da34e0 | 2023 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2024 | { |
b7826503 PJ |
2025 | CHECK_NUMBER_COERCE_MARKER (*b); |
2026 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2027 | |
2028 | if (XINT (*b) > XINT (*e)) | |
2029 | { | |
03192067 KH |
2030 | Lisp_Object tem; |
2031 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2032 | } |
2033 | ||
2034 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2035 | && XINT (*e) <= ZV)) | |
2036 | args_out_of_range (*b, *e); | |
2037 | } | |
2038 | \f | |
b05525fa RS |
2039 | /* Advance BYTE_POS up to a character boundary |
2040 | and return the adjusted position. */ | |
2041 | ||
2042 | static int | |
145582a0 | 2043 | advance_to_char_boundary (EMACS_INT byte_pos) |
b05525fa | 2044 | { |
f8449323 | 2045 | int c; |
b05525fa | 2046 | |
f8449323 RS |
2047 | if (byte_pos == BEG) |
2048 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2049 | return BEG; |
f8449323 RS |
2050 | |
2051 | c = FETCH_BYTE (byte_pos); | |
2052 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2053 | { |
1be6387d | 2054 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2055 | multibyte sequence. */ |
145582a0 | 2056 | EMACS_INT orig_byte_pos = byte_pos; |
a9bcded1 KH |
2057 | |
2058 | do | |
2059 | { | |
2060 | byte_pos--; | |
2061 | c = FETCH_BYTE (byte_pos); | |
2062 | } | |
2063 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2064 | INC_POS (byte_pos); |
a9bcded1 KH |
2065 | if (byte_pos < orig_byte_pos) |
2066 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2067 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2068 | surely advance to the correct character boundary. If C is | |
2069 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2070 | } |
2071 | ||
20773569 | 2072 | return byte_pos; |
b05525fa RS |
2073 | } |
2074 | ||
baae5c2d | 2075 | #ifdef REL_ALLOC |
f57e2426 | 2076 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2077 | #endif /* REL_ALLOC */ |
2078 | ||
13cda5f9 SM |
2079 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2080 | 1, 1, 0, | |
2081 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2082 | (Lisp_Object buffer) |
13cda5f9 SM |
2083 | { |
2084 | struct buffer *other_buffer; | |
2085 | CHECK_BUFFER (buffer); | |
2086 | other_buffer = XBUFFER (buffer); | |
2087 | ||
4b4deea2 | 2088 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2089 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2090 | |
13cda5f9 SM |
2091 | /* Actually, it probably works just fine. |
2092 | * if (other_buffer == current_buffer) | |
2093 | * error ("Cannot swap a buffer's text with itself"); */ | |
2094 | ||
2095 | /* Actually, this may be workable as well, tho probably only if they're | |
2096 | *both* indirect. */ | |
2097 | if (other_buffer->base_buffer | |
2098 | || current_buffer->base_buffer) | |
2099 | error ("Cannot swap indirect buffers's text"); | |
2100 | ||
2101 | { /* This is probably harder to make work. */ | |
2102 | struct buffer *other; | |
2103 | for (other = all_buffers; other; other = other->next) | |
2104 | if (other->base_buffer == other_buffer | |
2105 | || other->base_buffer == current_buffer) | |
2106 | error ("One of the buffers to swap has indirect buffers"); | |
2107 | } | |
2108 | ||
2109 | #define swapfield(field, type) \ | |
2110 | do { \ | |
2111 | type tmp##field = other_buffer->field; \ | |
2112 | other_buffer->field = current_buffer->field; \ | |
2113 | current_buffer->field = tmp##field; \ | |
2114 | } while (0) | |
5d8ea120 TT |
2115 | #define swapfield_(field, type) \ |
2116 | do { \ | |
4b4deea2 TT |
2117 | type tmp##field = BVAR (other_buffer, field); \ |
2118 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2119 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2120 | } while (0) |
13cda5f9 SM |
2121 | |
2122 | swapfield (own_text, struct buffer_text); | |
2123 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2124 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2125 | #ifdef REL_ALLOC |
40b615d6 JR |
2126 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2127 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2128 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2129 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2130 | #endif /* REL_ALLOC */ |
2131 | ||
13cda5f9 SM |
2132 | swapfield (pt, EMACS_INT); |
2133 | swapfield (pt_byte, EMACS_INT); | |
2134 | swapfield (begv, EMACS_INT); | |
2135 | swapfield (begv_byte, EMACS_INT); | |
2136 | swapfield (zv, EMACS_INT); | |
2137 | swapfield (zv_byte, EMACS_INT); | |
2138 | eassert (!current_buffer->base_buffer); | |
2139 | eassert (!other_buffer->base_buffer); | |
2140 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2141 | swapfield (newline_cache, struct region_cache *); | |
2142 | swapfield (width_run_cache, struct region_cache *); | |
2143 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2144 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2145 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2146 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2147 | swapfield (overlay_center, EMACS_INT); | |
5d8ea120 TT |
2148 | swapfield_ (undo_list, Lisp_Object); |
2149 | swapfield_ (mark, Lisp_Object); | |
2150 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2151 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2152 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2153 | /* FIXME: Not sure what we should do with these *_marker fields. |
2154 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2155 | swapfield_ (pt_marker, Lisp_Object); |
2156 | swapfield_ (begv_marker, Lisp_Object); | |
2157 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2158 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2159 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2160 | |
2161 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2162 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2163 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2164 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2165 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2166 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2167 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2168 | { |
2169 | struct Lisp_Marker *m; | |
2170 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2171 | if (m->buffer == other_buffer) | |
2172 | m->buffer = current_buffer; | |
b8ff72fa SM |
2173 | else |
2174 | /* Since there's no indirect buffer in sight, markers on | |
2175 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2176 | eassert (!m->buffer); | |
13cda5f9 SM |
2177 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2178 | if (m->buffer == current_buffer) | |
2179 | m->buffer = other_buffer; | |
b8ff72fa SM |
2180 | else |
2181 | /* Since there's no indirect buffer in sight, markers on | |
2182 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2183 | eassert (!m->buffer); | |
13cda5f9 | 2184 | } |
126f1fc1 SM |
2185 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2186 | So since we just swapped the markers between the two buffers, we need | |
2187 | to undo the effect of this swap for window markers. */ | |
2188 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2189 | Lisp_Object buf1, buf2; | |
2190 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2191 | ||
2192 | while (NILP (Fmemq (w, ws))) | |
2193 | { | |
2194 | ws = Fcons (w, ws); | |
2195 | if (MARKERP (XWINDOW (w)->pointm) | |
2196 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2197 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2198 | Fset_marker (XWINDOW (w)->pointm, | |
2199 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2200 | XWINDOW (w)->buffer); | |
2201 | w = Fnext_window (w, Qt, Qt); | |
2202 | } | |
2203 | } | |
2204 | ||
13cda5f9 SM |
2205 | if (current_buffer->text->intervals) |
2206 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2207 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2208 | if (other_buffer->text->intervals) | |
2209 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2210 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2211 | ||
2212 | return Qnil; | |
2213 | } | |
2214 | ||
3ac81adb RS |
2215 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2216 | 1, 1, 0, | |
7ee72033 | 2217 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2218 | If FLAG is t, this makes the buffer a multibyte buffer. |
2219 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2220 | In these cases, the buffer contents remain unchanged as a sequence of |
2221 | bytes but the contents viewed as characters do change. | |
2222 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2223 | all eight-bit bytes to eight-bit characters. |
2224 | If the multibyte flag was really changed, undo information of the | |
2225 | current buffer is cleared. */) | |
5842a27b | 2226 | (Lisp_Object flag) |
3ac81adb | 2227 | { |
65745fad | 2228 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2229 | struct buffer *other; |
145582a0 | 2230 | EMACS_INT begv, zv; |
8d1203ea | 2231 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2232 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2233 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2234 | struct gcpro gcpro1; |
3ac81adb | 2235 | |
6e553d5e RS |
2236 | if (current_buffer->base_buffer) |
2237 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2238 | ||
70e77119 | 2239 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2240 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2241 | return flag; |
2242 | ||
38babc07 KS |
2243 | GCPRO1 (old_undo); |
2244 | ||
2245 | /* Don't record these buffer changes. We will put a special undo entry | |
2246 | instead. */ | |
4b4deea2 | 2247 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2248 | |
3ac81adb RS |
2249 | /* If the cached position is for this buffer, clear it out. */ |
2250 | clear_charpos_cache (current_buffer); | |
2251 | ||
458c8af4 KH |
2252 | if (NILP (flag)) |
2253 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2254 | else | |
2255 | begv = BEGV, zv = ZV; | |
2256 | ||
a9bcded1 KH |
2257 | if (narrowed) |
2258 | Fwiden (); | |
2259 | ||
3ac81adb RS |
2260 | if (NILP (flag)) |
2261 | { | |
145582a0 | 2262 | EMACS_INT pos, stop; |
a9bcded1 KH |
2263 | unsigned char *p; |
2264 | ||
3ac81adb RS |
2265 | /* Do this first, so it can use CHAR_TO_BYTE |
2266 | to calculate the old correspondences. */ | |
2267 | set_intervals_multibyte (0); | |
2268 | ||
4b4deea2 | 2269 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2270 | |
2271 | Z = Z_BYTE; | |
2272 | BEGV = BEGV_BYTE; | |
2273 | ZV = ZV_BYTE; | |
2274 | GPT = GPT_BYTE; | |
2275 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2276 | ||
60ebfdf3 | 2277 | |
65745fad SM |
2278 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2279 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2280 | |
2281 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2282 | pos = BEG; | |
2283 | stop = GPT; | |
2284 | p = BEG_ADDR; | |
2285 | while (1) | |
2286 | { | |
2287 | int c, bytes; | |
2288 | ||
2289 | if (pos == stop) | |
2290 | { | |
2291 | if (pos == Z) | |
2292 | break; | |
2293 | p = GAP_END_ADDR; | |
2294 | stop = Z; | |
2295 | } | |
8f348ed5 KH |
2296 | if (ASCII_BYTE_P (*p)) |
2297 | p++, pos++; | |
2298 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2299 | { |
62a6e103 | 2300 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2301 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2302 | last one, and change the last one to the character |
a9bcded1 KH |
2303 | code. */ |
2304 | bytes--; | |
2305 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2306 | p = GAP_END_ADDR; | |
2307 | *p++ = c; | |
2308 | pos++; | |
2309 | if (begv > pos) | |
2310 | begv -= bytes; | |
2311 | if (zv > pos) | |
2312 | zv -= bytes; | |
2313 | stop = Z; | |
2314 | } | |
8f924df7 | 2315 | else |
8f348ed5 KH |
2316 | { |
2317 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2318 | p += bytes, pos += bytes; | |
2319 | } | |
a9bcded1 KH |
2320 | } |
2321 | if (narrowed) | |
2322 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2323 | } |
2324 | else | |
2325 | { | |
145582a0 EZ |
2326 | EMACS_INT pt = PT; |
2327 | EMACS_INT pos, stop; | |
8f348ed5 | 2328 | unsigned char *p, *pend; |
a9bcded1 | 2329 | |
673c57d2 | 2330 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2331 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2332 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2333 | |
8f924df7 | 2334 | if (EQ (flag, Qt) |
a3a303df | 2335 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2336 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2337 | { | |
8f54f30a | 2338 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2339 | |
8f54f30a PE |
2340 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2341 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2342 | { |
8f54f30a | 2343 | EMACS_INT new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2344 | |
2345 | move_gap_both (new_gpt, new_gpt); | |
2346 | } | |
2347 | } | |
2348 | ||
a9bcded1 KH |
2349 | /* Make the buffer contents valid as multibyte by converting |
2350 | 8-bit characters to multibyte form. */ | |
2351 | pos = BEG; | |
2352 | stop = GPT; | |
2353 | p = BEG_ADDR; | |
8f348ed5 | 2354 | pend = GPT_ADDR; |
a9bcded1 KH |
2355 | while (1) |
2356 | { | |
2357 | int bytes; | |
2358 | ||
2359 | if (pos == stop) | |
2360 | { | |
2361 | if (pos == Z) | |
2362 | break; | |
2363 | p = GAP_END_ADDR; | |
8f348ed5 | 2364 | pend = Z_ADDR; |
a9bcded1 KH |
2365 | stop = Z; |
2366 | } | |
177c0ea7 | 2367 | |
a3a303df KH |
2368 | if (ASCII_BYTE_P (*p)) |
2369 | p++, pos++; | |
dcfb9bc4 KH |
2370 | else if (EQ (flag, Qt) |
2371 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2372 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2373 | p += bytes, pos += bytes; |
2374 | else | |
2375 | { | |
2376 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2377 | int c; |
a9bcded1 | 2378 | |
8f924df7 | 2379 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2380 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2381 | *p = tmp[0]; |
2382 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2383 | bytes--; | |
b68864e5 | 2384 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2385 | /* Now the gap is after the just inserted data. */ |
2386 | pos = GPT; | |
2387 | p = GAP_END_ADDR; | |
2388 | if (pos <= begv) | |
2389 | begv += bytes; | |
2390 | if (pos <= zv) | |
2391 | zv += bytes; | |
2392 | if (pos <= pt) | |
2393 | pt += bytes; | |
31285a8f | 2394 | pend = Z_ADDR; |
a9bcded1 KH |
2395 | stop = Z; |
2396 | } | |
2397 | } | |
2398 | ||
2399 | if (pt != PT) | |
2400 | TEMP_SET_PT (pt); | |
2401 | ||
2402 | if (narrowed) | |
2403 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2404 | ||
3ac81adb RS |
2405 | /* Do this first, so that chars_in_text asks the right question. |
2406 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2407 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2408 | |
b05525fa | 2409 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2410 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2411 | |
673c57d2 | 2412 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2413 | |
2414 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2415 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2416 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2417 | else |
2418 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2419 | |
2420 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2421 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2422 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2423 | else |
2424 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2425 | |
2426 | { | |
8f54f30a PE |
2427 | EMACS_INT byte = advance_to_char_boundary (PT_BYTE); |
2428 | EMACS_INT position; | |
b05525fa | 2429 | |
8f54f30a PE |
2430 | if (byte > GPT_BYTE) |
2431 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2432 | else |
8f54f30a PE |
2433 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2434 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2435 | } |
3ac81adb RS |
2436 | |
2437 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2438 | |
2439 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2440 | getting confused by the markers that have not yet been updated. | |
2441 | It is also a signal that it should never create a marker. */ | |
65745fad | 2442 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2443 | |
65745fad | 2444 | for (; tail; tail = tail->next) |
3ac81adb | 2445 | { |
65745fad SM |
2446 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2447 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2448 | } |
b69f9797 RS |
2449 | |
2450 | /* Make sure no markers were put on the chain | |
2451 | while the chain value was incorrect. */ | |
65745fad | 2452 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2453 | abort (); |
2454 | ||
3ac81adb RS |
2455 | BUF_MARKERS (current_buffer) = markers; |
2456 | ||
2457 | /* Do this last, so it can calculate the new correspondences | |
2458 | between chars and bytes. */ | |
2459 | set_intervals_multibyte (1); | |
2460 | } | |
2461 | ||
38babc07 KS |
2462 | if (!EQ (old_undo, Qt)) |
2463 | { | |
2464 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2465 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2466 | intern ("set-buffer-multibyte"), |
2467 | NILP (flag) ? Qt : Qnil), | |
2468 | old_undo); | |
38babc07 KS |
2469 | } |
2470 | ||
2471 | UNGCPRO; | |
a9bcded1 | 2472 | |
724b203f GM |
2473 | /* Changing the multibyteness of a buffer means that all windows |
2474 | showing that buffer must be updated thoroughly. */ | |
2475 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2476 | ++windows_or_buffers_changed; | |
2477 | ||
abc9d959 RS |
2478 | /* Copy this buffer's new multibyte status |
2479 | into all of its indirect buffers. */ | |
2480 | for (other = all_buffers; other; other = other->next) | |
4b4deea2 | 2481 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2482 | { |
4b4deea2 TT |
2483 | BVAR (other, enable_multibyte_characters) |
2484 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2485 | other->prevent_redisplay_optimizations_p = 1; |
2486 | } | |
abc9d959 | 2487 | |
ed00559d KH |
2488 | /* Restore the modifiedness of the buffer. */ |
2489 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2490 | Fset_buffer_modified_p (Qnil); | |
2491 | ||
172f9454 KH |
2492 | /* Update coding systems of this buffer's process (if any). */ |
2493 | { | |
2494 | Lisp_Object process; | |
2495 | ||
2496 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2497 | if (PROCESSP (process)) | |
2498 | setup_process_coding_systems (process); | |
2499 | } | |
2500 | ||
3ac81adb RS |
2501 | return flag; |
2502 | } | |
2503 | \f | |
1ab256cb | 2504 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2505 | 0, 0, 0, |
7ee72033 | 2506 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2507 | Most local variable bindings are eliminated so that the default values |
2508 | become effective once more. Also, the syntax table is set from | |
2509 | `standard-syntax-table', the local keymap is set to nil, | |
2510 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2511 | This function also forces redisplay of the mode line. | |
2512 | ||
2513 | Every function to select a new major mode starts by | |
2514 | calling this function. | |
2515 | ||
2516 | As a special exception, local variables whose names have | |
2517 | a non-nil `permanent-local' property are not eliminated by this function. | |
2518 | ||
2519 | The first thing this function does is run | |
7ee72033 | 2520 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2521 | (void) |
1ab256cb | 2522 | { |
dee091a3 | 2523 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2524 | |
3709505e | 2525 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2526 | remain swapped in, in their symbols. */ |
1ab256cb | 2527 | |
2f3f993b | 2528 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2529 | |
2530 | /* Actually eliminate all local bindings of this buffer. */ | |
2531 | ||
13de9290 | 2532 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2533 | |
1ab256cb RM |
2534 | /* Force mode-line redisplay. Useful here because all major mode |
2535 | commands call this function. */ | |
2536 | update_mode_lines++; | |
2537 | ||
2538 | return Qnil; | |
2539 | } | |
2f3f993b RS |
2540 | |
2541 | /* Make sure no local variables remain set up with buffer B | |
2542 | for their current values. */ | |
2543 | ||
2544 | static void | |
d3da34e0 | 2545 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2546 | { |
ce5b453a | 2547 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2548 | |
2549 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2550 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2551 | |
67ee9f6e | 2552 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2553 | { |
ce5b453a SM |
2554 | Lisp_Object sym = XCAR (XCAR (alist)); |
2555 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2556 | /* Need not do anything if some other buffer's binding is | |
2557 | now encached. */ | |
2558 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2559 | { |
e7c10f83 SM |
2560 | /* Symbol is set up for this buffer's old local value: |
2561 | swap it out! */ | |
ce5b453a | 2562 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2563 | } |
2564 | } | |
2565 | } | |
1ab256cb | 2566 | \f |
2eec3b4e | 2567 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2568 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2569 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2570 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2571 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2572 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2573 | or where an overlay starts which ends at or after POS; |
624d2678 | 2574 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2575 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2576 | |
2577 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2578 | when this function is called. |
2579 | ||
2580 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2581 | If EXTEND is zero, we never extend the vector, | |
2582 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2583 | But we still return the total number of overlays. |
2584 | ||
2585 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2586 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2587 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2588 | |
2589 | int | |
d3da34e0 JB |
2590 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2591 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2592 | { |
2410d73a SM |
2593 | Lisp_Object overlay, start, end; |
2594 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2595 | int idx = 0; |
2596 | int len = *len_ptr; | |
2597 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2598 | EMACS_INT next = ZV; |
2599 | EMACS_INT prev = BEGV; | |
61d54cd5 RS |
2600 | int inhibit_storing = 0; |
2601 | ||
2410d73a | 2602 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2603 | { |
145582a0 | 2604 | EMACS_INT startpos, endpos; |
52f8ec73 | 2605 | |
2410d73a | 2606 | XSETMISC (overlay, tail); |
1ab256cb | 2607 | |
2eec3b4e RS |
2608 | start = OVERLAY_START (overlay); |
2609 | end = OVERLAY_END (overlay); | |
239c932b RS |
2610 | endpos = OVERLAY_POSITION (end); |
2611 | if (endpos < pos) | |
2612 | { | |
2613 | if (prev < endpos) | |
2614 | prev = endpos; | |
2615 | break; | |
2616 | } | |
413e06a4 RS |
2617 | startpos = OVERLAY_POSITION (start); |
2618 | /* This one ends at or after POS | |
daa1c109 | 2619 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2620 | if (prev < startpos && startpos < pos) |
2621 | prev = startpos; | |
239c932b RS |
2622 | if (endpos == pos) |
2623 | continue; | |
2eec3b4e RS |
2624 | if (startpos <= pos) |
2625 | { | |
2626 | if (idx == len) | |
2627 | { | |
61d54cd5 RS |
2628 | /* The supplied vector is full. |
2629 | Either make it bigger, or don't store any more in it. */ | |
2630 | if (extend) | |
2631 | { | |
0552666b GM |
2632 | /* Make it work with an initial len == 0. */ |
2633 | len *= 2; | |
2634 | if (len == 0) | |
2635 | len = 4; | |
2636 | *len_ptr = len; | |
61d54cd5 RS |
2637 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2638 | *vec_ptr = vec; | |
2639 | } | |
2640 | else | |
2641 | inhibit_storing = 1; | |
2eec3b4e | 2642 | } |
61d54cd5 RS |
2643 | |
2644 | if (!inhibit_storing) | |
2645 | vec[idx] = overlay; | |
2646 | /* Keep counting overlays even if we can't return them all. */ | |
2647 | idx++; | |
2eec3b4e RS |
2648 | } |
2649 | else if (startpos < next) | |
2650 | next = startpos; | |
2651 | } | |
2652 | ||
2410d73a | 2653 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2654 | { |
145582a0 | 2655 | EMACS_INT startpos, endpos; |
52f8ec73 | 2656 | |
2410d73a | 2657 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2658 | |
2659 | start = OVERLAY_START (overlay); | |
2660 | end = OVERLAY_END (overlay); | |
2661 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2662 | if (pos < startpos) |
2eec3b4e RS |
2663 | { |
2664 | if (startpos < next) | |
2665 | next = startpos; | |
2666 | break; | |
2667 | } | |
239c932b RS |
2668 | endpos = OVERLAY_POSITION (end); |
2669 | if (pos < endpos) | |
2eec3b4e RS |
2670 | { |
2671 | if (idx == len) | |
2672 | { | |
61d54cd5 RS |
2673 | if (extend) |
2674 | { | |
4b0e44fc RS |
2675 | /* Make it work with an initial len == 0. */ |
2676 | len *= 2; | |
0552666b | 2677 | if (len == 0) |
4b0e44fc RS |
2678 | len = 4; |
2679 | *len_ptr = len; | |
61d54cd5 RS |
2680 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2681 | *vec_ptr = vec; | |
2682 | } | |
2683 | else | |
2684 | inhibit_storing = 1; | |
2eec3b4e | 2685 | } |
61d54cd5 RS |
2686 | |
2687 | if (!inhibit_storing) | |
2688 | vec[idx] = overlay; | |
2689 | idx++; | |
413e06a4 RS |
2690 | |
2691 | if (startpos < pos && startpos > prev) | |
2692 | prev = startpos; | |
2eec3b4e | 2693 | } |
239c932b RS |
2694 | else if (endpos < pos && endpos > prev) |
2695 | prev = endpos; | |
1d5f4c1d MB |
2696 | else if (endpos == pos && startpos > prev |
2697 | && (!change_req || startpos < pos)) | |
413e06a4 | 2698 | prev = startpos; |
1ab256cb RM |
2699 | } |
2700 | ||
239c932b RS |
2701 | if (next_ptr) |
2702 | *next_ptr = next; | |
2703 | if (prev_ptr) | |
2704 | *prev_ptr = prev; | |
2eec3b4e RS |
2705 | return idx; |
2706 | } | |
74514898 | 2707 | \f |
7723e095 MR |
2708 | /* Find all the overlays in the current buffer that overlap the range |
2709 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2710 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2711 | |
177c0ea7 | 2712 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2713 | Store in *LEN_PTR the size allocated for the vector. |
2714 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2715 | or ZV if there are no more overlays. | |
2716 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2717 | or BEGV if there are no previous overlays. | |
2718 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2719 | ||
2720 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2721 | when this function is called. | |
2722 | ||
2723 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2724 | If EXTEND is zero, we never extend the vector, | |
2725 | and we store only as many overlays as will fit. | |
2726 | But we still return the total number of overlays. */ | |
2727 | ||
a9b9a780 | 2728 | static int |
145582a0 EZ |
2729 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
2730 | Lisp_Object **vec_ptr, int *len_ptr, | |
2731 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr) | |
74514898 | 2732 | { |
2410d73a SM |
2733 | Lisp_Object overlay, ostart, oend; |
2734 | struct Lisp_Overlay *tail; | |
74514898 RS |
2735 | int idx = 0; |
2736 | int len = *len_ptr; | |
2737 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2738 | EMACS_INT next = ZV; |
2739 | EMACS_INT prev = BEGV; | |
74514898 | 2740 | int inhibit_storing = 0; |
7723e095 | 2741 | int end_is_Z = end == Z; |
74514898 | 2742 | |
2410d73a | 2743 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2744 | { |
145582a0 | 2745 | EMACS_INT startpos, endpos; |
74514898 | 2746 | |
2410d73a | 2747 | XSETMISC (overlay, tail); |
74514898 RS |
2748 | |
2749 | ostart = OVERLAY_START (overlay); | |
2750 | oend = OVERLAY_END (overlay); | |
2751 | endpos = OVERLAY_POSITION (oend); | |
2752 | if (endpos < beg) | |
2753 | { | |
2754 | if (prev < endpos) | |
2755 | prev = endpos; | |
2756 | break; | |
2757 | } | |
2758 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2759 | /* Count an interval if it overlaps the range, is empty at the |
2760 | start of the range, or is empty at END provided END denotes the | |
2761 | end of the buffer. */ | |
74514898 | 2762 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2763 | || (startpos == endpos |
2764 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2765 | { |
2766 | if (idx == len) | |
2767 | { | |
2768 | /* The supplied vector is full. | |
2769 | Either make it bigger, or don't store any more in it. */ | |
2770 | if (extend) | |
2771 | { | |
4b0e44fc RS |
2772 | /* Make it work with an initial len == 0. */ |
2773 | len *= 2; | |
2774 | if (len == 0) | |
2775 | len = 4; | |
2776 | *len_ptr = len; | |
74514898 RS |
2777 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2778 | *vec_ptr = vec; | |
2779 | } | |
2780 | else | |
2781 | inhibit_storing = 1; | |
2782 | } | |
2783 | ||
2784 | if (!inhibit_storing) | |
2785 | vec[idx] = overlay; | |
2786 | /* Keep counting overlays even if we can't return them all. */ | |
2787 | idx++; | |
2788 | } | |
2789 | else if (startpos < next) | |
2790 | next = startpos; | |
2791 | } | |
2792 | ||
2410d73a | 2793 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2794 | { |
145582a0 | 2795 | EMACS_INT startpos, endpos; |
74514898 | 2796 | |
2410d73a | 2797 | XSETMISC (overlay, tail); |
74514898 RS |
2798 | |
2799 | ostart = OVERLAY_START (overlay); | |
2800 | oend = OVERLAY_END (overlay); | |
2801 | startpos = OVERLAY_POSITION (ostart); | |
2802 | if (end < startpos) | |
2803 | { | |
2804 | if (startpos < next) | |
2805 | next = startpos; | |
2806 | break; | |
2807 | } | |
2808 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2809 | /* Count an interval if it overlaps the range, is empty at the |
2810 | start of the range, or is empty at END provided END denotes the | |
2811 | end of the buffer. */ | |
74514898 | 2812 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2813 | || (startpos == endpos |
2814 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2815 | { |
2816 | if (idx == len) | |
2817 | { | |
2818 | if (extend) | |
2819 | { | |
4b0e44fc RS |
2820 | /* Make it work with an initial len == 0. */ |
2821 | len *= 2; | |
2822 | if (len == 0) | |
2823 | len = 4; | |
2824 | *len_ptr = len; | |
74514898 RS |
2825 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2826 | *vec_ptr = vec; | |
2827 | } | |
2828 | else | |
2829 | inhibit_storing = 1; | |
2830 | } | |
2831 | ||
2832 | if (!inhibit_storing) | |
2833 | vec[idx] = overlay; | |
2834 | idx++; | |
2835 | } | |
2836 | else if (endpos < beg && endpos > prev) | |
2837 | prev = endpos; | |
2838 | } | |
fc04fa47 | 2839 | |
74514898 RS |
2840 | if (next_ptr) |
2841 | *next_ptr = next; | |
2842 | if (prev_ptr) | |
2843 | *prev_ptr = prev; | |
2844 | return idx; | |
2845 | } | |
09a22085 GM |
2846 | |
2847 | ||
2848 | /* Return non-zero if there exists an overlay with a non-nil | |
2849 | `mouse-face' property overlapping OVERLAY. */ | |
2850 | ||
2851 | int | |
d3da34e0 | 2852 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2853 | { |
145582a0 EZ |
2854 | EMACS_INT start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2855 | EMACS_INT end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2856 | int n, i, size; |
09a22085 | 2857 | Lisp_Object *v, tem; |
177c0ea7 | 2858 | |
bfd8410f GM |
2859 | size = 10; |
2860 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2861 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2862 | if (n > size) | |
09a22085 | 2863 | { |
09a22085 GM |
2864 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2865 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2866 | } | |
2867 | ||
2868 | for (i = 0; i < n; ++i) | |
2869 | if (!EQ (v[i], overlay) | |
2870 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2871 | !NILP (tem))) | |
2872 | break; | |
2873 | ||
2874 | return i < n; | |
2875 | } | |
2876 | ||
2877 | ||
74514898 | 2878 | \f |
fc04fa47 KH |
2879 | /* Fast function to just test if we're at an overlay boundary. */ |
2880 | int | |
145582a0 | 2881 | overlay_touches_p (EMACS_INT pos) |
fc04fa47 | 2882 | { |
2410d73a SM |
2883 | Lisp_Object overlay; |
2884 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2885 | |
2410d73a | 2886 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2887 | { |
145582a0 | 2888 | EMACS_INT endpos; |
fc04fa47 | 2889 | |
2410d73a | 2890 | XSETMISC (overlay ,tail); |
8e50cc2d | 2891 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2892 | abort (); |
2893 | ||
2894 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2895 | if (endpos < pos) | |
2896 | break; | |
2897 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2898 | return 1; | |
2899 | } | |
2900 | ||
2410d73a | 2901 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2902 | { |
145582a0 | 2903 | EMACS_INT startpos; |
fc04fa47 | 2904 | |
2410d73a | 2905 | XSETMISC (overlay, tail); |
8e50cc2d | 2906 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2907 | abort (); |
2908 | ||
2909 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2910 | if (pos < startpos) | |
2911 | break; | |
2912 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2913 | return 1; | |
2914 | } | |
2915 | return 0; | |
2916 | } | |
2eec3b4e | 2917 | \f |
5985d248 KH |
2918 | struct sortvec |
2919 | { | |
2920 | Lisp_Object overlay; | |
145582a0 | 2921 | EMACS_INT beg, end; |
5985d248 KH |
2922 | int priority; |
2923 | }; | |
2924 | ||
2925 | static int | |
d3da34e0 | 2926 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2927 | { |
dfcf069d AS |
2928 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2929 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2930 | if (s1->priority != s2->priority) |
2931 | return s1->priority - s2->priority; | |
2932 | if (s1->beg != s2->beg) | |
2933 | return s1->beg - s2->beg; | |
2934 | if (s1->end != s2->end) | |
2935 | return s2->end - s1->end; | |
2936 | return 0; | |
2937 | } | |
2938 | ||
2939 | /* Sort an array of overlays by priority. The array is modified in place. | |
2940 | The return value is the new size; this may be smaller than the original | |
2941 | size if some of the overlays were invalid or were window-specific. */ | |
2942 | int | |
d3da34e0 | 2943 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
2944 | { |
2945 | int i, j; | |
2946 | struct sortvec *sortvec; | |
2947 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2948 | ||
2949 | /* Put the valid and relevant overlays into sortvec. */ | |
2950 | ||
2951 | for (i = 0, j = 0; i < noverlays; i++) | |
2952 | { | |
0fa767e7 | 2953 | Lisp_Object tem; |
c99fc30f | 2954 | Lisp_Object overlay; |
5985d248 | 2955 | |
c99fc30f | 2956 | overlay = overlay_vec[i]; |
5985d248 KH |
2957 | if (OVERLAY_VALID (overlay) |
2958 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2959 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2960 | { | |
0fa767e7 KH |
2961 | /* If we're interested in a specific window, then ignore |
2962 | overlays that are limited to some other window. */ | |
2963 | if (w) | |
5985d248 | 2964 | { |
0fa767e7 KH |
2965 | Lisp_Object window; |
2966 | ||
2967 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2968 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2969 | continue; |
5985d248 | 2970 | } |
0fa767e7 KH |
2971 | |
2972 | /* This overlay is good and counts: put it into sortvec. */ | |
2973 | sortvec[j].overlay = overlay; | |
2974 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2975 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2976 | tem = Foverlay_get (overlay, Qpriority); | |
2977 | if (INTEGERP (tem)) | |
2978 | sortvec[j].priority = XINT (tem); | |
2979 | else | |
2980 | sortvec[j].priority = 0; | |
2981 | j++; | |
5985d248 KH |
2982 | } |
2983 | } | |
2984 | noverlays = j; | |
2985 | ||
2986 | /* Sort the overlays into the proper order: increasing priority. */ | |
2987 | ||
2988 | if (noverlays > 1) | |
2989 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2990 | ||
2991 | for (i = 0; i < noverlays; i++) | |
2992 | overlay_vec[i] = sortvec[i].overlay; | |
2993 | return (noverlays); | |
2994 | } | |
2995 | \f | |
bbbe9545 KH |
2996 | struct sortstr |
2997 | { | |
cb26008f | 2998 | Lisp_Object string, string2; |
bbbe9545 KH |
2999 | int size; |
3000 | int priority; | |
3001 | }; | |
3002 | ||
e8185fa8 KH |
3003 | struct sortstrlist |
3004 | { | |
3005 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3006 | int size; /* Allocated length of that array. */ | |
3007 | int used; /* How much of the array is currently in use. */ | |
145582a0 | 3008 | EMACS_INT bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3009 | }; |
3010 | ||
3011 | /* Buffers for storing information about the overlays touching a given | |
3012 | position. These could be automatic variables in overlay_strings, but | |
3013 | it's more efficient to hold onto the memory instead of repeatedly | |
3014 | allocating and freeing it. */ | |
3015 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3016 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3017 | |
3018 | /* Allocated length of overlay_str_buf. */ | |
145582a0 | 3019 | static EMACS_INT overlay_str_len; |
e8185fa8 | 3020 | |
bbbe9545 KH |
3021 | /* A comparison function suitable for passing to qsort. */ |
3022 | static int | |
d3da34e0 | 3023 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3024 | { |
3025 | struct sortstr *s1 = (struct sortstr *)as1; | |
3026 | struct sortstr *s2 = (struct sortstr *)as2; | |
3027 | if (s1->size != s2->size) | |
3028 | return s2->size - s1->size; | |
3029 | if (s1->priority != s2->priority) | |
3030 | return s1->priority - s2->priority; | |
3031 | return 0; | |
3032 | } | |
3033 | ||
e8185fa8 | 3034 | static void |
d3da34e0 | 3035 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, Lisp_Object str2, Lisp_Object pri, int size) |
e8185fa8 | 3036 | { |
145582a0 | 3037 | EMACS_INT nbytes; |
43d27a72 | 3038 | |
e8185fa8 KH |
3039 | if (ssl->used == ssl->size) |
3040 | { | |
3041 | if (ssl->buf) | |
3042 | ssl->size *= 2; | |
3043 | else | |
3044 | ssl->size = 5; | |
3045 | ssl->buf = ((struct sortstr *) | |
3046 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3047 | } | |
3048 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3049 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3050 | ssl->buf[ssl->used].size = size; |
3051 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3052 | ssl->used++; | |
43d27a72 | 3053 | |
4b4deea2 | 3054 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3055 | nbytes = SCHARS (str); |
43d27a72 | 3056 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3057 | nbytes = count_size_as_multibyte (SDATA (str), |
3058 | SBYTES (str)); | |
43d27a72 | 3059 | else |
d5db4077 | 3060 | nbytes = SBYTES (str); |
43d27a72 RS |
3061 | |
3062 | ssl->bytes += nbytes; | |
3063 | ||
cb26008f | 3064 | if (STRINGP (str2)) |
43d27a72 | 3065 | { |
4b4deea2 | 3066 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3067 | nbytes = SCHARS (str2); |
43d27a72 | 3068 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3069 | nbytes = count_size_as_multibyte (SDATA (str2), |
3070 | SBYTES (str2)); | |
43d27a72 | 3071 | else |
d5db4077 | 3072 | nbytes = SBYTES (str2); |
43d27a72 RS |
3073 | |
3074 | ssl->bytes += nbytes; | |
3075 | } | |
e8185fa8 | 3076 | } |
bbbe9545 KH |
3077 | |
3078 | /* Return the concatenation of the strings associated with overlays that | |
3079 | begin or end at POS, ignoring overlays that are specific to a window | |
3080 | other than W. The strings are concatenated in the appropriate order: | |
3081 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3082 | lower. Normally all of the after-strings come first, but zero-sized |
3083 | overlays have their after-strings ride along with the before-strings | |
3084 | because it would look strange to print them inside-out. | |
3085 | ||
3086 | Returns the string length, and stores the contents indirectly through | |
3087 | PSTR, if that variable is non-null. The string may be overwritten by | |
3088 | subsequent calls. */ | |
6b5d3b89 | 3089 | |
5816888b | 3090 | EMACS_INT |
d3da34e0 | 3091 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3092 | { |
2410d73a SM |
3093 | Lisp_Object overlay, window, str; |
3094 | struct Lisp_Overlay *ov; | |
145582a0 | 3095 | EMACS_INT startpos, endpos; |
4b4deea2 | 3096 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3097 | |
e8185fa8 KH |
3098 | overlay_heads.used = overlay_heads.bytes = 0; |
3099 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3100 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3101 | { |
2410d73a | 3102 | XSETMISC (overlay, ov); |
c2d5b10f | 3103 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3104 | |
3105 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3106 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3107 | if (endpos < pos) | |
3108 | break; | |
3109 | if (endpos != pos && startpos != pos) | |
3110 | continue; | |
3111 | window = Foverlay_get (overlay, Qwindow); | |
3112 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3113 | continue; | |
e8185fa8 KH |
3114 | if (startpos == pos |
3115 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3116 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3117 | (startpos == endpos |
3118 | ? Foverlay_get (overlay, Qafter_string) | |
3119 | : Qnil), | |
3120 | Foverlay_get (overlay, Qpriority), | |
3121 | endpos - startpos); | |
3122 | else if (endpos == pos | |
3123 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3124 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3125 | Foverlay_get (overlay, Qpriority), |
3126 | endpos - startpos); | |
bbbe9545 | 3127 | } |
2410d73a | 3128 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3129 | { |
2410d73a SM |
3130 | XSETMISC (overlay, ov); |
3131 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3132 | |
3133 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3134 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3135 | if (startpos > pos) | |
3136 | break; | |
e8185fa8 KH |
3137 | if (endpos != pos && startpos != pos) |
3138 | continue; | |
3139 | window = Foverlay_get (overlay, Qwindow); | |
3140 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3141 | continue; | |
e8185fa8 KH |
3142 | if (startpos == pos |
3143 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3144 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3145 | (startpos == endpos |
3146 | ? Foverlay_get (overlay, Qafter_string) | |
3147 | : Qnil), | |
3148 | Foverlay_get (overlay, Qpriority), | |
3149 | endpos - startpos); | |
3150 | else if (endpos == pos | |
3151 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3152 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3153 | Foverlay_get (overlay, Qpriority), |
3154 | endpos - startpos); | |
bbbe9545 | 3155 | } |
e8185fa8 KH |
3156 | if (overlay_tails.used > 1) |
3157 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3158 | cmp_for_strings); | |
3159 | if (overlay_heads.used > 1) | |
3160 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3161 | cmp_for_strings); | |
3162 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3163 | { |
e8185fa8 | 3164 | Lisp_Object tem; |
145582a0 | 3165 | EMACS_INT i; |
9f4d7cde | 3166 | unsigned char *p; |
145582a0 | 3167 | EMACS_INT total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3168 | |
3169 | if (total > overlay_str_len) | |
9f4d7cde RS |
3170 | { |
3171 | overlay_str_len = total; | |
3172 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3173 | total); | |
3174 | } | |
bbbe9545 | 3175 | p = overlay_str_buf; |
e8185fa8 | 3176 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3177 | { |
145582a0 | 3178 | EMACS_INT nbytes; |
e8185fa8 | 3179 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3180 | nbytes = copy_text (SDATA (tem), p, |
3181 | SBYTES (tem), | |
43d27a72 RS |
3182 | STRING_MULTIBYTE (tem), multibyte); |
3183 | p += nbytes; | |
bbbe9545 | 3184 | } |
e8185fa8 | 3185 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3186 | { |
145582a0 | 3187 | EMACS_INT nbytes; |
e8185fa8 | 3188 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3189 | nbytes = copy_text (SDATA (tem), p, |
3190 | SBYTES (tem), | |
43d27a72 RS |
3191 | STRING_MULTIBYTE (tem), multibyte); |
3192 | p += nbytes; | |
cb26008f KH |
3193 | tem = overlay_heads.buf[i].string2; |
3194 | if (STRINGP (tem)) | |
3195 | { | |
d5db4077 KR |
3196 | nbytes = copy_text (SDATA (tem), p, |
3197 | SBYTES (tem), | |
43d27a72 RS |
3198 | STRING_MULTIBYTE (tem), multibyte); |
3199 | p += nbytes; | |
cb26008f | 3200 | } |
bbbe9545 | 3201 | } |
cb26008f KH |
3202 | if (p != overlay_str_buf + total) |
3203 | abort (); | |
bbbe9545 KH |
3204 | if (pstr) |
3205 | *pstr = overlay_str_buf; | |
e8185fa8 | 3206 | return total; |
bbbe9545 | 3207 | } |
e8185fa8 | 3208 | return 0; |
bbbe9545 KH |
3209 | } |
3210 | \f | |
5c4f68f1 | 3211 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3212 | |
2eec3b4e | 3213 | void |
d3da34e0 | 3214 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3215 | { |
2410d73a SM |
3216 | Lisp_Object overlay, beg, end; |
3217 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3218 | |
3219 | /* See if anything in overlays_before should move to overlays_after. */ | |
3220 | ||
3221 | /* We don't strictly need prev in this loop; it should always be nil. | |
3222 | But we use it for symmetry and in case that should cease to be true | |
3223 | with some future change. */ | |
2410d73a SM |
3224 | prev = NULL; |
3225 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3226 | { |
2410d73a SM |
3227 | next = tail->next; |
3228 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3229 | |
3230 | /* If the overlay is not valid, get rid of it. */ | |
3231 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3232 | #if 1 |
3233 | abort (); | |
3234 | #else | |
2eec3b4e RS |
3235 | { |
3236 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3237 | if (!NILP (prev)) | |
7539e11f | 3238 | XCDR (prev) = next; |
2eec3b4e | 3239 | else |
5c4f68f1 | 3240 | buf->overlays_before = next; |
2eec3b4e RS |
3241 | tail = prev; |
3242 | continue; | |
3243 | } | |
52f8ec73 | 3244 | #endif |
1ab256cb | 3245 | |
2eec3b4e RS |
3246 | beg = OVERLAY_START (overlay); |
3247 | end = OVERLAY_END (overlay); | |
1ab256cb | 3248 | |
2eec3b4e | 3249 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3250 | { |
2eec3b4e | 3251 | /* OVERLAY needs to be moved. */ |
145582a0 | 3252 | EMACS_INT where = OVERLAY_POSITION (beg); |
2410d73a | 3253 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3254 | |
3255 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3256 | if (prev) |
3257 | prev->next = next; | |
2eec3b4e | 3258 | else |
5c4f68f1 | 3259 | buf->overlays_before = next; |
2eec3b4e RS |
3260 | |
3261 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3262 | other_prev = NULL; |
3263 | for (other = buf->overlays_after; other; | |
3264 | other_prev = other, other = other->next) | |
1ab256cb | 3265 | { |
6af718a4 | 3266 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3267 | |
2410d73a SM |
3268 | XSETMISC (otheroverlay, other); |
3269 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3270 | |
3271 | otherbeg = OVERLAY_START (otheroverlay); | |
3272 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3273 | break; | |
1ab256cb | 3274 | } |
2eec3b4e RS |
3275 | |
3276 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3277 | tail->next = other; |
3278 | if (other_prev) | |
3279 | other_prev->next = tail; | |
1ab256cb | 3280 | else |
5c4f68f1 | 3281 | buf->overlays_after = tail; |
2eec3b4e | 3282 | tail = prev; |
1ab256cb | 3283 | } |
2eec3b4e RS |
3284 | else |
3285 | /* We've reached the things that should stay in overlays_before. | |
3286 | All the rest of overlays_before must end even earlier, | |
3287 | so stop now. */ | |
3288 | break; | |
3289 | } | |
3290 | ||
3291 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3292 | prev = NULL; |
3293 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3294 | { |
2410d73a SM |
3295 | next = tail->next; |
3296 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3297 | |
3298 | /* If the overlay is not valid, get rid of it. */ | |
3299 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3300 | #if 1 |
3301 | abort (); | |
3302 | #else | |
2eec3b4e RS |
3303 | { |
3304 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3305 | if (!NILP (prev)) | |
7539e11f | 3306 | XCDR (prev) = next; |
2eec3b4e | 3307 | else |
5c4f68f1 | 3308 | buf->overlays_after = next; |
2eec3b4e RS |
3309 | tail = prev; |
3310 | continue; | |
3311 | } | |
52f8ec73 | 3312 | #endif |
2eec3b4e RS |
3313 | |
3314 | beg = OVERLAY_START (overlay); | |
3315 | end = OVERLAY_END (overlay); | |
3316 | ||
3317 | /* Stop looking, when we know that nothing further | |
3318 | can possibly end before POS. */ | |
3319 | if (OVERLAY_POSITION (beg) > pos) | |
3320 | break; | |
3321 | ||
3322 | if (OVERLAY_POSITION (end) <= pos) | |
3323 | { | |
3324 | /* OVERLAY needs to be moved. */ | |
145582a0 | 3325 | EMACS_INT where = OVERLAY_POSITION (end); |
2410d73a | 3326 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3327 | |
3328 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3329 | if (prev) |
3330 | prev->next = next; | |
2eec3b4e | 3331 | else |
5c4f68f1 | 3332 | buf->overlays_after = next; |
2eec3b4e RS |
3333 | |
3334 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3335 | other_prev = NULL; |
3336 | for (other = buf->overlays_before; other; | |
3337 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3338 | { |
3339 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3340 | |
2410d73a SM |
3341 | XSETMISC (otheroverlay, other); |
3342 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3343 | |
3344 | otherend = OVERLAY_END (otheroverlay); | |
3345 | if (OVERLAY_POSITION (otherend) <= where) | |
3346 | break; | |
3347 | } | |
3348 | ||
3349 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3350 | tail->next = other; |
3351 | if (other_prev) | |
3352 | other_prev->next = tail; | |
2eec3b4e | 3353 | else |
5c4f68f1 | 3354 | buf->overlays_before = tail; |
2eec3b4e RS |
3355 | tail = prev; |
3356 | } | |
3357 | } | |
3358 | ||
c2d5b10f | 3359 | buf->overlay_center = pos; |
2eec3b4e | 3360 | } |
2b1bdf65 | 3361 | |
423cdb46 | 3362 | void |
d3da34e0 | 3363 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3364 | { |
3365 | /* After an insertion, the lists are still sorted properly, | |
3366 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3367 | if (current_buffer->overlay_center >= pos) |
3368 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3369 | } |
3370 | ||
3371 | void | |
d3da34e0 | 3372 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3373 | { |
c2d5b10f | 3374 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3375 | /* The deletion was to our right. No change needed; the before- and |
3376 | after-lists are still consistent. */ | |
3377 | ; | |
c2d5b10f | 3378 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3379 | /* The deletion was to our left. We need to adjust the center value |
3380 | to account for the change in position, but the lists are consistent | |
3381 | given the new value. */ | |
c2d5b10f | 3382 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3383 | else |
3384 | /* We're right in the middle. There might be things on the after-list | |
3385 | that now belong on the before-list. Recentering will move them, | |
3386 | and also update the center point. */ | |
3387 | recenter_overlay_lists (current_buffer, pos); | |
3388 | } | |
3389 | ||
2b1bdf65 KH |
3390 | /* Fix up overlays that were garbled as a result of permuting markers |
3391 | in the range START through END. Any overlay with at least one | |
3392 | endpoint in this range will need to be unlinked from the overlay | |
3393 | list and reinserted in its proper place. | |
3394 | Such an overlay might even have negative size at this point. | |
6b61353c | 3395 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3396 | void |
145582a0 | 3397 | fix_start_end_in_overlays (register EMACS_INT start, register EMACS_INT end) |
2b1bdf65 | 3398 | { |
6af718a4 | 3399 | Lisp_Object overlay; |
5df8f01b PE |
3400 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3401 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3402 | /* These are either nil, indicating that before_list or after_list |
3403 | should be assigned, or the cons cell the cdr of which should be | |
3404 | assigned. */ | |
2410d73a | 3405 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3406 | /* 'Parent', likewise, indicates a cons cell or |
3407 | current_buffer->overlays_before or overlays_after, depending | |
3408 | which loop we're in. */ | |
2410d73a | 3409 | struct Lisp_Overlay *tail, *parent; |
145582a0 | 3410 | EMACS_INT startpos, endpos; |
2b1bdf65 KH |
3411 | |
3412 | /* This algorithm shifts links around instead of consing and GCing. | |
3413 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3414 | well-formed list except that its last element, the CDR of beforep |
3415 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3416 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3417 | that before_list isn't initialized, although it may look | |
3418 | strange. */ | |
2410d73a | 3419 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3420 | { |
2410d73a | 3421 | XSETMISC (overlay, tail); |
6b61353c | 3422 | |
2b1bdf65 | 3423 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3424 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3425 | ||
3426 | /* If the overlay is backwards, make it empty. */ | |
3427 | if (endpos < startpos) | |
3428 | { | |
3429 | startpos = endpos; | |
3430 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3431 | Qnil); | |
3432 | } | |
3433 | ||
2b1bdf65 KH |
3434 | if (endpos < start) |
3435 | break; | |
60ebfdf3 | 3436 | |
2b1bdf65 KH |
3437 | if (endpos < end |
3438 | || (startpos >= start && startpos < end)) | |
3439 | { | |
2b1bdf65 KH |
3440 | /* Add it to the end of the wrong list. Later on, |
3441 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3442 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3443 | { |
2410d73a | 3444 | if (!afterp) |
1138e742 KR |
3445 | after_list = tail; |
3446 | else | |
2410d73a | 3447 | afterp->next = tail; |
1138e742 | 3448 | afterp = tail; |
2b1bdf65 KH |
3449 | } |
3450 | else | |
3451 | { | |
2410d73a | 3452 | if (!beforep) |
1138e742 KR |
3453 | before_list = tail; |
3454 | else | |
2410d73a | 3455 | beforep->next = tail; |
1138e742 | 3456 | beforep = tail; |
2b1bdf65 | 3457 | } |
2410d73a SM |
3458 | if (!parent) |
3459 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3460 | else |
2410d73a SM |
3461 | parent->next = tail->next; |
3462 | tail = tail->next; | |
2b1bdf65 KH |
3463 | } |
3464 | else | |
2410d73a | 3465 | parent = tail, tail = parent->next; |
2b1bdf65 | 3466 | } |
2410d73a | 3467 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3468 | { |
2410d73a | 3469 | XSETMISC (overlay, tail); |
6b61353c | 3470 | |
2b1bdf65 | 3471 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3472 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3473 | ||
3474 | /* If the overlay is backwards, make it empty. */ | |
3475 | if (endpos < startpos) | |
3476 | { | |
3477 | startpos = endpos; | |
3478 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3479 | Qnil); |
6b61353c KH |
3480 | } |
3481 | ||
2b1bdf65 KH |
3482 | if (startpos >= end) |
3483 | break; | |
6b61353c | 3484 | |
2b1bdf65 KH |
3485 | if (startpos >= start |
3486 | || (endpos >= start && endpos < end)) | |
3487 | { | |
c2d5b10f | 3488 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3489 | { |
2410d73a | 3490 | if (!afterp) |
1138e742 KR |
3491 | after_list = tail; |
3492 | else | |
2410d73a | 3493 | afterp->next = tail; |
1138e742 | 3494 | afterp = tail; |
2b1bdf65 KH |
3495 | } |
3496 | else | |
3497 | { | |
2410d73a | 3498 | if (!beforep) |
1138e742 KR |
3499 | before_list = tail; |
3500 | else | |
2410d73a | 3501 | beforep->next = tail; |
1138e742 | 3502 | beforep = tail; |
2b1bdf65 | 3503 | } |
2410d73a SM |
3504 | if (!parent) |
3505 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3506 | else |
2410d73a SM |
3507 | parent->next = tail->next; |
3508 | tail = tail->next; | |
2b1bdf65 KH |
3509 | } |
3510 | else | |
2410d73a | 3511 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3512 | } |
3513 | ||
3514 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3515 | and let the recenter function make it sane again. */ | |
2410d73a | 3516 | if (beforep) |
1138e742 | 3517 | { |
2410d73a | 3518 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3519 | current_buffer->overlays_before = before_list; |
3520 | } | |
c2d5b10f | 3521 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3522 | |
2410d73a | 3523 | if (afterp) |
1138e742 | 3524 | { |
2410d73a | 3525 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3526 | current_buffer->overlays_after = after_list; |
3527 | } | |
c2d5b10f | 3528 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3529 | } |
3b06f880 KH |
3530 | |
3531 | /* We have two types of overlay: the one whose ending marker is | |
3532 | after-insertion-marker (this is the usual case) and the one whose | |
3533 | ending marker is before-insertion-marker. When `overlays_before' | |
3534 | contains overlays of the latter type and the former type in this | |
3535 | order and both overlays end at inserting position, inserting a text | |
3536 | increases only the ending marker of the latter type, which results | |
3537 | in incorrect ordering of `overlays_before'. | |
3538 | ||
3539 | This function fixes ordering of overlays in the slot | |
3540 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3541 | was at PREV, and now is at POS. */ | |
3542 | ||
01136e9b | 3543 | void |
d3da34e0 | 3544 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3545 | { |
2410d73a SM |
3546 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3547 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3548 | Lisp_Object tem; | |
5df8f01b | 3549 | EMACS_INT end IF_LINT (= 0); |
3b06f880 KH |
3550 | |
3551 | /* After the insertion, the several overlays may be in incorrect | |
3552 | order. The possibility is that, in the list `overlays_before', | |
3553 | an overlay which ends at POS appears after an overlay which ends | |
3554 | at PREV. Since POS is greater than PREV, we must fix the | |
3555 | ordering of these overlays, by moving overlays ends at POS before | |
3556 | the overlays ends at PREV. */ | |
3557 | ||
3558 | /* At first, find a place where disordered overlays should be linked | |
3559 | in. It is where an overlay which end before POS exists. (i.e. an | |
3560 | overlay whose ending marker is after-insertion-marker if disorder | |
3561 | exists). */ | |
2410d73a SM |
3562 | while (tail |
3563 | && (XSETMISC (tem, tail), | |
3564 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3565 | { |
3566 | parent = tail; | |
2410d73a | 3567 | tail = tail->next; |
1138e742 | 3568 | } |
3b06f880 KH |
3569 | |
3570 | /* If we don't find such an overlay, | |
3571 | or the found one ends before PREV, | |
3572 | or the found one is the last one in the list, | |
3573 | we don't have to fix anything. */ | |
f93ad4cf | 3574 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3575 | return; |
3576 | ||
1138e742 KR |
3577 | right_pair = parent; |
3578 | parent = tail; | |
2410d73a | 3579 | tail = tail->next; |
3b06f880 | 3580 | |
1138e742 | 3581 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3582 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3583 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3584 | we found an overlay which ends before PREV, the remaining | |
3585 | overlays are in correct order. */ | |
2410d73a | 3586 | while (tail) |
3b06f880 | 3587 | { |
2410d73a SM |
3588 | XSETMISC (tem, tail); |
3589 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3590 | |
3591 | if (end == pos) | |
3592 | { /* This overlay is disordered. */ | |
2410d73a | 3593 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3594 | |
3595 | /* Unlink the found overlay. */ | |
2410d73a SM |
3596 | tail = found->next; |
3597 | parent->next = tail; | |
1138e742 KR |
3598 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3599 | and link it into the right place. */ | |
2410d73a | 3600 | if (!right_pair) |
1138e742 | 3601 | { |
2410d73a | 3602 | found->next = bp->overlays_before; |
1138e742 KR |
3603 | bp->overlays_before = found; |
3604 | } | |
3605 | else | |
3606 | { | |
2410d73a SM |
3607 | found->next = right_pair->next; |
3608 | right_pair->next = found; | |
1138e742 | 3609 | } |
3b06f880 KH |
3610 | } |
3611 | else if (end == prev) | |
1138e742 KR |
3612 | { |
3613 | parent = tail; | |
2410d73a | 3614 | tail = tail->next; |
1138e742 | 3615 | } |
3b06f880 KH |
3616 | else /* No more disordered overlay. */ |
3617 | break; | |
3618 | } | |
3619 | } | |
2eec3b4e | 3620 | \f |
52f8ec73 | 3621 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3622 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3623 | (Lisp_Object object) |
52f8ec73 JB |
3624 | { |
3625 | return (OVERLAYP (object) ? Qt : Qnil); | |
3626 | } | |
3627 | ||
acac2700 | 3628 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3629 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3630 | If omitted, BUFFER defaults to the current buffer. |
3631 | BEG and END may be integers or markers. | |
a625ee20 RS |
3632 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3633 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3634 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3635 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3636 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3637 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3638 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3639 | { |
3640 | Lisp_Object overlay; | |
5c4f68f1 | 3641 | struct buffer *b; |
2eec3b4e | 3642 | |
5c4f68f1 | 3643 | if (NILP (buffer)) |
67180c6a | 3644 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3645 | else |
b7826503 | 3646 | CHECK_BUFFER (buffer); |
883047b9 JB |
3647 | if (MARKERP (beg) |
3648 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3649 | error ("Marker points into wrong buffer"); | |
3650 | if (MARKERP (end) | |
3651 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3652 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3653 | |
b7826503 PJ |
3654 | CHECK_NUMBER_COERCE_MARKER (beg); |
3655 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3656 | |
883047b9 | 3657 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3658 | { |
c99fc30f KH |
3659 | Lisp_Object temp; |
3660 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3661 | } |
883047b9 JB |
3662 | |
3663 | b = XBUFFER (buffer); | |
3664 | ||
3665 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3666 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3667 | |
acac2700 RS |
3668 | if (!NILP (front_advance)) |
3669 | XMARKER (beg)->insertion_type = 1; | |
3670 | if (!NILP (rear_advance)) | |
3671 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3672 | |
48e2e3ba | 3673 | overlay = allocate_misc (); |
89ca3e1b | 3674 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3675 | XOVERLAY (overlay)->start = beg; |
3676 | XOVERLAY (overlay)->end = end; | |
3677 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3678 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3679 | |
177c0ea7 | 3680 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3681 | end = OVERLAY_END (overlay); |
c2d5b10f | 3682 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3683 | { |
3684 | if (b->overlays_after) | |
3685 | XOVERLAY (overlay)->next = b->overlays_after; | |
3686 | b->overlays_after = XOVERLAY (overlay); | |
3687 | } | |
2eec3b4e | 3688 | else |
2410d73a SM |
3689 | { |
3690 | if (b->overlays_before) | |
3691 | XOVERLAY (overlay)->next = b->overlays_before; | |
3692 | b->overlays_before = XOVERLAY (overlay); | |
3693 | } | |
2eec3b4e RS |
3694 | |
3695 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3696 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3697 | |
b61982dd JB |
3698 | /* We don't need to redisplay the region covered by the overlay, because |
3699 | the overlay has no properties at the moment. */ | |
3700 | ||
2eec3b4e RS |
3701 | return overlay; |
3702 | } | |
876aa27c RS |
3703 | \f |
3704 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3705 | ||
3706 | static void | |
d3da34e0 | 3707 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3708 | { |
876aa27c RS |
3709 | if (start > end) |
3710 | { | |
145582a0 | 3711 | EMACS_INT temp = start; |
26f545d7 GM |
3712 | start = end; |
3713 | end = temp; | |
876aa27c RS |
3714 | } |
3715 | ||
481b5054 | 3716 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3717 | |
876aa27c RS |
3718 | /* If this is a buffer not in the selected window, |
3719 | we must do other windows. */ | |
3720 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3721 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3722 | /* If multiple windows show this buffer, we must do other windows. */ |
3723 | else if (buffer_shared > 1) | |
3724 | windows_or_buffers_changed = 1; | |
18700091 KS |
3725 | /* If we modify an overlay at the end of the buffer, we cannot |
3726 | be sure that window end is still valid. */ | |
3727 | else if (end >= ZV && start <= ZV) | |
3728 | windows_or_buffers_changed = 1; | |
876aa27c | 3729 | |
d8b9150f | 3730 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3731 | } |
2eec3b4e | 3732 | |
018ba359 | 3733 | \f |
2410d73a | 3734 | static struct Lisp_Overlay * |
d3da34e0 | 3735 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3736 | { |
3737 | struct Lisp_Overlay *tmp, *prev; | |
3738 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3739 | if (tmp == overlay) | |
3740 | { | |
3741 | if (prev) | |
3742 | prev->next = tmp->next; | |
3743 | else | |
3744 | list = tmp->next; | |
3745 | overlay->next = NULL; | |
3746 | break; | |
3747 | } | |
3748 | return list; | |
3749 | } | |
3750 | ||
5c4f68f1 | 3751 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3752 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3753 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3754 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3755 | buffer. */) |
5842a27b | 3756 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3757 | { |
0a4469c9 RS |
3758 | struct buffer *b, *ob; |
3759 | Lisp_Object obuffer; | |
aed13378 | 3760 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3761 | |
b7826503 | 3762 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3763 | if (NILP (buffer)) |
3764 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3765 | if (NILP (buffer)) |
67180c6a | 3766 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3767 | CHECK_BUFFER (buffer); |
883047b9 JB |
3768 | |
3769 | if (MARKERP (beg) | |
3770 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3771 | error ("Marker points into wrong buffer"); | |
3772 | if (MARKERP (end) | |
3773 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3774 | error ("Marker points into wrong buffer"); | |
3775 | ||
b7826503 PJ |
3776 | CHECK_NUMBER_COERCE_MARKER (beg); |
3777 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3778 | |
9d7608b7 KH |
3779 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3780 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3781 | |
b61982dd JB |
3782 | if (XINT (beg) > XINT (end)) |
3783 | { | |
c99fc30f KH |
3784 | Lisp_Object temp; |
3785 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3786 | } |
3787 | ||
9d7608b7 KH |
3788 | specbind (Qinhibit_quit, Qt); |
3789 | ||
0a4469c9 | 3790 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3791 | b = XBUFFER (buffer); |
8801a864 | 3792 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3793 | |
c82ed728 | 3794 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3795 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3796 | { |
3797 | /* Redisplay where the overlay was. */ | |
3798 | if (!NILP (obuffer)) | |
3799 | { | |
145582a0 EZ |
3800 | EMACS_INT o_beg; |
3801 | EMACS_INT o_end; | |
50760c4a | 3802 | |
80509f2f RS |
3803 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3804 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3805 | |
2e34157c | 3806 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3807 | } |
3808 | ||
3809 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3810 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3811 | } |
c82ed728 JB |
3812 | else |
3813 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3814 | { | |
145582a0 | 3815 | EMACS_INT o_beg, o_end; |
c82ed728 | 3816 | |
80509f2f RS |
3817 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3818 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3819 | |
2e34157c RS |
3820 | if (o_beg == XINT (beg)) |
3821 | modify_overlay (b, o_end, XINT (end)); | |
3822 | else if (o_end == XINT (end)) | |
3823 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3824 | else |
3825 | { | |
2e34157c RS |
3826 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3827 | if (XINT (end) > o_end) o_end = XINT (end); | |
3828 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3829 | } |
3830 | } | |
b61982dd | 3831 | |
0a4469c9 RS |
3832 | if (!NILP (obuffer)) |
3833 | { | |
2410d73a SM |
3834 | ob->overlays_before |
3835 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3836 | ob->overlays_after | |
3837 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3838 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3839 | } |
5c4f68f1 JB |
3840 | |
3841 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3842 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3843 | |
177c0ea7 | 3844 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3845 | end = OVERLAY_END (overlay); |
c2d5b10f | 3846 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3847 | { |
8f924df7 KH |
3848 | XOVERLAY (overlay)->next = b->overlays_after; |
3849 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3850 | } |
2eec3b4e | 3851 | else |
2410d73a | 3852 | { |
8f924df7 KH |
3853 | XOVERLAY (overlay)->next = b->overlays_before; |
3854 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3855 | } |
2eec3b4e RS |
3856 | |
3857 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3858 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3859 | |
0a4469c9 | 3860 | return unbind_to (count, overlay); |
2eec3b4e RS |
3861 | } |
3862 | ||
3863 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3864 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3865 | (Lisp_Object overlay) |
2eec3b4e | 3866 | { |
0a4469c9 | 3867 | Lisp_Object buffer; |
5c4f68f1 | 3868 | struct buffer *b; |
aed13378 | 3869 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3870 | |
b7826503 | 3871 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3872 | |
0a4469c9 RS |
3873 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3874 | if (NILP (buffer)) | |
3875 | return Qnil; | |
3876 | ||
3877 | b = XBUFFER (buffer); | |
0a4469c9 | 3878 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3879 | |
2410d73a SM |
3880 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3881 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3882 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3883 | modify_overlay (b, |
8231a9aa RS |
3884 | marker_position (OVERLAY_START (overlay)), |
3885 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3886 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3887 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3888 | ||
e58c389d | 3889 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3890 | display optimizations for the affected buffer, on the basis that |
3891 | these strings may contain newlines. This is easier to do than to | |
3892 | check for that situation during redisplay. */ | |
3893 | if (!windows_or_buffers_changed | |
3894 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3895 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3896 | b->prevent_redisplay_optimizations_p = 1; | |
3897 | ||
0a4469c9 | 3898 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3899 | } |
3900 | \f | |
8ebafa8d JB |
3901 | /* Overlay dissection functions. */ |
3902 | ||
3903 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 | 3904 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3905 | (Lisp_Object overlay) |
8ebafa8d | 3906 | { |
b7826503 | 3907 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3908 | |
3909 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3910 | } | |
3911 | ||
3912 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 | 3913 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3914 | (Lisp_Object overlay) |
8ebafa8d | 3915 | { |
b7826503 | 3916 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3917 | |
3918 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3919 | } | |
3920 | ||
3921 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3922 | doc: /* Return the buffer OVERLAY belongs to. |
3923 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3924 | (Lisp_Object overlay) |
8ebafa8d | 3925 | { |
b7826503 | 3926 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3927 | |
3928 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3929 | } | |
3930 | ||
3931 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3932 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3933 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3934 | OVERLAY. */) |
5842a27b | 3935 | (Lisp_Object overlay) |
8ebafa8d | 3936 | { |
b7826503 | 3937 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3938 | |
48e2e3ba | 3939 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3940 | } |
3941 | ||
3942 | \f | |
2eec3b4e | 3943 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3944 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3945 | (Lisp_Object pos) |
2eec3b4e RS |
3946 | { |
3947 | int noverlays; | |
2eec3b4e RS |
3948 | Lisp_Object *overlay_vec; |
3949 | int len; | |
3950 | Lisp_Object result; | |
3951 | ||
b7826503 | 3952 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3953 | |
3954 | len = 10; | |
a9800ae8 | 3955 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3956 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3957 | ||
3958 | /* Put all the overlays we want in a vector in overlay_vec. | |
3959 | Store the length in len. */ | |
2a77a7d7 | 3960 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3961 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
3962 | |
3963 | /* Make a list of them all. */ | |
3964 | result = Flist (noverlays, overlay_vec); | |
3965 | ||
9ac0d9e0 | 3966 | xfree (overlay_vec); |
2eec3b4e RS |
3967 | return result; |
3968 | } | |
3969 | ||
74514898 | 3970 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3971 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3972 | Overlap means that at least one character is contained within the overlay |
3973 | and also contained within the specified region. | |
7723e095 MR |
3974 | Empty overlays are included in the result if they are located at BEG, |
3975 | between BEG and END, or at END provided END denotes the position at the | |
3976 | end of the buffer. */) | |
5842a27b | 3977 | (Lisp_Object beg, Lisp_Object end) |
74514898 RS |
3978 | { |
3979 | int noverlays; | |
3980 | Lisp_Object *overlay_vec; | |
3981 | int len; | |
3982 | Lisp_Object result; | |
3983 | ||
b7826503 PJ |
3984 | CHECK_NUMBER_COERCE_MARKER (beg); |
3985 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3986 | |
3987 | len = 10; | |
3988 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3989 | ||
3990 | /* Put all the overlays we want in a vector in overlay_vec. | |
3991 | Store the length in len. */ | |
3992 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3993 | NULL, NULL); |
74514898 RS |
3994 | |
3995 | /* Make a list of them all. */ | |
3996 | result = Flist (noverlays, overlay_vec); | |
3997 | ||
3998 | xfree (overlay_vec); | |
3999 | return result; | |
4000 | } | |
4001 | ||
2eec3b4e | 4002 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4003 | 1, 1, 0, |
7ee72033 | 4004 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4005 | If there are no overlay boundaries from POS to (point-max), |
4006 | the value is (point-max). */) | |
5842a27b | 4007 | (Lisp_Object pos) |
2eec3b4e RS |
4008 | { |
4009 | int noverlays; | |
0f8b27ea | 4010 | EMACS_INT endpos; |
2eec3b4e RS |
4011 | Lisp_Object *overlay_vec; |
4012 | int len; | |
2eec3b4e RS |
4013 | int i; |
4014 | ||
b7826503 | 4015 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4016 | |
4017 | len = 10; | |
4018 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4019 | ||
4020 | /* Put all the overlays we want in a vector in overlay_vec. | |
4021 | Store the length in len. | |
4022 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4023 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4024 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4025 | |
4026 | /* If any of these overlays ends before endpos, | |
4027 | use its ending point instead. */ | |
4028 | for (i = 0; i < noverlays; i++) | |
4029 | { | |
4030 | Lisp_Object oend; | |
0f8b27ea | 4031 | EMACS_INT oendpos; |
2eec3b4e RS |
4032 | |
4033 | oend = OVERLAY_END (overlay_vec[i]); | |
4034 | oendpos = OVERLAY_POSITION (oend); | |
4035 | if (oendpos < endpos) | |
4036 | endpos = oendpos; | |
1ab256cb RM |
4037 | } |
4038 | ||
9ac0d9e0 | 4039 | xfree (overlay_vec); |
2eec3b4e RS |
4040 | return make_number (endpos); |
4041 | } | |
239c932b RS |
4042 | |
4043 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4044 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4045 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4046 | If there are no overlay boundaries from (point-min) to POS, |
4047 | the value is (point-min). */) | |
5842a27b | 4048 | (Lisp_Object pos) |
239c932b RS |
4049 | { |
4050 | int noverlays; | |
0f8b27ea | 4051 | EMACS_INT prevpos; |
239c932b RS |
4052 | Lisp_Object *overlay_vec; |
4053 | int len; | |
239c932b | 4054 | |
b7826503 | 4055 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4056 | |
624bbdc4 RS |
4057 | /* At beginning of buffer, we know the answer; |
4058 | avoid bug subtracting 1 below. */ | |
4059 | if (XINT (pos) == BEGV) | |
4060 | return pos; | |
4061 | ||
017f0539 GM |
4062 | len = 10; |
4063 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4064 | ||
239c932b RS |
4065 | /* Put all the overlays we want in a vector in overlay_vec. |
4066 | Store the length in len. | |
daa1c109 | 4067 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4068 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4069 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4070 | |
239c932b RS |
4071 | xfree (overlay_vec); |
4072 | return make_number (prevpos); | |
4073 | } | |
2eec3b4e RS |
4074 | \f |
4075 | /* These functions are for debugging overlays. */ | |
4076 | ||
4077 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4078 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4079 | The car has all the overlays before the overlay center; |
4080 | the cdr has all the overlays after the overlay center. | |
4081 | Recentering overlays moves overlays between these lists. | |
4082 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4083 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4084 | (void) |
2eec3b4e | 4085 | { |
2410d73a SM |
4086 | struct Lisp_Overlay *ol; |
4087 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4088 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4089 | { | |
4090 | XSETMISC (tmp, ol); | |
4091 | before = Fcons (tmp, before); | |
4092 | } | |
4093 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4094 | { | |
4095 | XSETMISC (tmp, ol); | |
4096 | after = Fcons (tmp, after); | |
4097 | } | |
4098 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4099 | } |
4100 | ||
4101 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4102 | doc: /* Recenter the overlays of the current buffer around position POS. |
4103 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4104 | for positions far away from POS). */) | |
5842a27b | 4105 | (Lisp_Object pos) |
2eec3b4e | 4106 | { |
b7826503 | 4107 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4108 | |
5c4f68f1 | 4109 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4110 | return Qnil; |
4111 | } | |
4112 | \f | |
4113 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 | 4114 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4115 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4116 | { |
b7826503 | 4117 | CHECK_OVERLAY (overlay); |
9a593927 | 4118 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4119 | } |
4120 | ||
4121 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 | 4122 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
5842a27b | 4123 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4124 | { |
48e2e3ba | 4125 | Lisp_Object tail, buffer; |
9d7608b7 | 4126 | int changed; |
2eec3b4e | 4127 | |
b7826503 | 4128 | CHECK_OVERLAY (overlay); |
b61982dd | 4129 | |
274a9425 RS |
4130 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4131 | ||
48e2e3ba | 4132 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4133 | CONSP (tail) && CONSP (XCDR (tail)); |
4134 | tail = XCDR (XCDR (tail))) | |
4135 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4136 | { |
7539e11f | 4137 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4138 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4139 | goto found; |
274a9425 | 4140 | } |
9d7608b7 KH |
4141 | /* It wasn't in the list, so add it to the front. */ |
4142 | changed = !NILP (value); | |
48e2e3ba KH |
4143 | XOVERLAY (overlay)->plist |
4144 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4145 | found: |
4146 | if (! NILP (buffer)) | |
4147 | { | |
4148 | if (changed) | |
876aa27c | 4149 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4150 | marker_position (OVERLAY_START (overlay)), |
4151 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4152 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4153 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4154 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4155 | Fdelete_overlay (overlay); | |
4156 | } | |
7d63db98 | 4157 | |
2eec3b4e | 4158 | return value; |
1ab256cb RM |
4159 | } |
4160 | \f | |
9115729e KH |
4161 | /* Subroutine of report_overlay_modification. */ |
4162 | ||
4163 | /* Lisp vector holding overlay hook functions to call. | |
4164 | Vector elements come in pairs. | |
4165 | Each even-index element is a list of hook functions. | |
4166 | The following odd-index element is the overlay they came from. | |
4167 | ||
4168 | Before the buffer change, we fill in this vector | |
4169 | as we call overlay hook functions. | |
4170 | After the buffer change, we get the functions to call from this vector. | |
4171 | This way we always call the same functions before and after the change. */ | |
4172 | static Lisp_Object last_overlay_modification_hooks; | |
4173 | ||
4174 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4175 | static int last_overlay_modification_hooks_used; | |
4176 | ||
4177 | /* Add one functionlist/overlay pair | |
4178 | to the end of last_overlay_modification_hooks. */ | |
4179 | ||
4180 | static void | |
d3da34e0 | 4181 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e KH |
4182 | { |
4183 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4184 | ||
4185 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4186 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4187 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4188 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4189 | functionlist); last_overlay_modification_hooks_used++; | |
4190 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4191 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4192 | } |
4193 | \f | |
173f2a64 RS |
4194 | /* Run the modification-hooks of overlays that include |
4195 | any part of the text in START to END. | |
9115729e KH |
4196 | If this change is an insertion, also |
4197 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4198 | and the insert-after-hooks of overlay ending at START. |
4199 | ||
4200 | This is called both before and after the modification. | |
4201 | AFTER is nonzero when we call after the modification. | |
4202 | ||
9115729e KH |
4203 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4204 | When AFTER is nonzero, they are the start position, | |
4205 | the position after the inserted new text, | |
4206 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4207 | |
4208 | void | |
d3da34e0 JB |
4209 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4210 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4211 | { |
2410d73a SM |
4212 | Lisp_Object prop, overlay; |
4213 | struct Lisp_Overlay *tail; | |
9115729e KH |
4214 | /* 1 if this change is an insertion. */ |
4215 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4216 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4217 | |
4218 | overlay = Qnil; | |
2410d73a | 4219 | tail = NULL; |
9115729e | 4220 | |
27c6b98e SM |
4221 | /* We used to run the functions as soon as we found them and only register |
4222 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4223 | case. But running elisp code as we traverse the list of overlays is | |
4224 | painful because the list can be modified by the elisp code so we had to | |
4225 | copy at several places. We now simply do a read-only traversal that | |
4226 | only collects the functions to run and we run them afterwards. It's | |
4227 | simpler, especially since all the code was already there. -stef */ | |
4228 | ||
a615c6dc | 4229 | if (!after) |
173f2a64 | 4230 | { |
a615c6dc SM |
4231 | /* We are being called before a change. |
4232 | Scan the overlays to find the functions to call. */ | |
4233 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4234 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4235 | { |
145582a0 | 4236 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4237 | Lisp_Object ostart, oend; |
4238 | ||
2410d73a | 4239 | XSETMISC (overlay, tail); |
a615c6dc SM |
4240 | |
4241 | ostart = OVERLAY_START (overlay); | |
4242 | oend = OVERLAY_END (overlay); | |
4243 | endpos = OVERLAY_POSITION (oend); | |
4244 | if (XFASTINT (start) > endpos) | |
4245 | break; | |
4246 | startpos = OVERLAY_POSITION (ostart); | |
4247 | if (insertion && (XFASTINT (start) == startpos | |
4248 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4249 | { |
a615c6dc SM |
4250 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4251 | if (!NILP (prop)) | |
4252 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4253 | } |
a615c6dc SM |
4254 | if (insertion && (XFASTINT (start) == endpos |
4255 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4256 | { |
a615c6dc SM |
4257 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4258 | if (!NILP (prop)) | |
4259 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4260 | } |
a615c6dc SM |
4261 | /* Test for intersecting intervals. This does the right thing |
4262 | for both insertion and deletion. */ | |
4263 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4264 | { |
a615c6dc SM |
4265 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4266 | if (!NILP (prop)) | |
4267 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4268 | } |
173f2a64 | 4269 | } |
60ebfdf3 | 4270 | |
2410d73a | 4271 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4272 | { |
145582a0 | 4273 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4274 | Lisp_Object ostart, oend; |
4275 | ||
2410d73a | 4276 | XSETMISC (overlay, tail); |
a615c6dc SM |
4277 | |
4278 | ostart = OVERLAY_START (overlay); | |
4279 | oend = OVERLAY_END (overlay); | |
4280 | startpos = OVERLAY_POSITION (ostart); | |
4281 | endpos = OVERLAY_POSITION (oend); | |
4282 | if (XFASTINT (end) < startpos) | |
4283 | break; | |
4284 | if (insertion && (XFASTINT (start) == startpos | |
4285 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4286 | { |
a615c6dc SM |
4287 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4288 | if (!NILP (prop)) | |
4289 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4290 | } |
a615c6dc SM |
4291 | if (insertion && (XFASTINT (start) == endpos |
4292 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4293 | { |
a615c6dc SM |
4294 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4295 | if (!NILP (prop)) | |
4296 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4297 | } |
a615c6dc SM |
4298 | /* Test for intersecting intervals. This does the right thing |
4299 | for both insertion and deletion. */ | |
4300 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4301 | { |
a615c6dc SM |
4302 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4303 | if (!NILP (prop)) | |
4304 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4305 | } |
173f2a64 RS |
4306 | } |
4307 | } | |
55b48893 | 4308 | |
a615c6dc SM |
4309 | GCPRO4 (overlay, arg1, arg2, arg3); |
4310 | { | |
4311 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4312 | First copy the vector contents, in case some of these hooks | |
4313 | do subsequent modification of the buffer. */ | |
4314 | int size = last_overlay_modification_hooks_used; | |
4315 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4316 | int i; | |
4317 | ||
72af86bd AS |
4318 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4319 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4320 | gcpro1.var = copy; |
4321 | gcpro1.nvars = size; | |
4322 | ||
4323 | for (i = 0; i < size;) | |
4324 | { | |
8f54f30a PE |
4325 | Lisp_Object prop_i, overlay_i; |
4326 | prop_i = copy[i++]; | |
4327 | overlay_i = copy[i++]; | |
4328 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4329 | } |
4330 | } | |
55b48893 | 4331 | UNGCPRO; |
173f2a64 RS |
4332 | } |
4333 | ||
4334 | static void | |
d3da34e0 JB |
4335 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4336 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4337 | { |
930a9140 | 4338 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4339 | |
930a9140 | 4340 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4341 | |
6d70a280 | 4342 | while (CONSP (list)) |
173f2a64 | 4343 | { |
930a9140 | 4344 | if (NILP (arg3)) |
6d70a280 | 4345 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4346 | else |
6d70a280 SM |
4347 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4348 | list = XCDR (list); | |
173f2a64 RS |
4349 | } |
4350 | UNGCPRO; | |
4351 | } | |
9d7608b7 KH |
4352 | |
4353 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4354 | property is set. */ | |
4355 | void | |
d3da34e0 | 4356 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4357 | { |
2410d73a SM |
4358 | Lisp_Object overlay, hit_list; |
4359 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4360 | |
4361 | hit_list = Qnil; | |
c2d5b10f | 4362 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4363 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4364 | { |
145582a0 | 4365 | EMACS_INT endpos; |
2410d73a | 4366 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4367 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4368 | if (endpos < pos) | |
4369 | break; | |
4370 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4371 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4372 | hit_list = Fcons (overlay, hit_list); |
4373 | } | |
4374 | else | |
2410d73a | 4375 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4376 | { |
145582a0 | 4377 | EMACS_INT startpos; |
2410d73a | 4378 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4379 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4380 | if (startpos > pos) | |
4381 | break; | |
4382 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4383 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4384 | hit_list = Fcons (overlay, hit_list); |
4385 | } | |
7539e11f KR |
4386 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4387 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4388 | } |
173f2a64 | 4389 | \f |
54dfdeb0 | 4390 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4391 | in the slot with offset OFFSET. */ |
4392 | ||
0fa3ba92 | 4393 | void |
d3da34e0 | 4394 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4395 | { |
ad97b375 | 4396 | Lisp_Object predicate; |
177c0ea7 | 4397 | |
64e16c3c | 4398 | switch (type) |
0fa3ba92 | 4399 | { |
2de9f71c | 4400 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4401 | case Lisp_String: predicate = Qstringp; break; |
4402 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4403 | default: abort (); | |
0fa3ba92 JB |
4404 | } |
4405 | ||
ad97b375 | 4406 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4407 | } |
7c02e886 | 4408 | |
0fa3ba92 | 4409 | \f |
b86af064 GM |
4410 | /*********************************************************************** |
4411 | Allocation with mmap | |
4412 | ***********************************************************************/ | |
4413 | ||
4414 | #ifdef USE_MMAP_FOR_BUFFERS | |
4415 | ||
4416 | #include <sys/types.h> | |
4417 | #include <sys/mman.h> | |
4418 | ||
4419 | #ifndef MAP_ANON | |
4420 | #ifdef MAP_ANONYMOUS | |
4421 | #define MAP_ANON MAP_ANONYMOUS | |
4422 | #else | |
4423 | #define MAP_ANON 0 | |
4424 | #endif | |
4425 | #endif | |
4426 | ||
09dfdf85 GM |
4427 | #ifndef MAP_FAILED |
4428 | #define MAP_FAILED ((void *) -1) | |
4429 | #endif | |
4430 | ||
b86af064 | 4431 | #include <stdio.h> |
b86af064 GM |
4432 | |
4433 | #if MAP_ANON == 0 | |
4434 | #include <fcntl.h> | |
4435 | #endif | |
4436 | ||
4437 | #include "coding.h" | |
4438 | ||
4439 | ||
4440 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4441 | The current implementation lets the system select mapped | |
4442 | addresses; we're not using MAP_FIXED in general, except when | |
4443 | trying to enlarge regions. | |
4444 | ||
4445 | Each mapped region starts with a mmap_region structure, the user | |
4446 | area starts after that structure, aligned to MEM_ALIGN. | |
4447 | ||
4448 | +-----------------------+ | |
4449 | | struct mmap_info + | | |
4450 | | padding | | |
4451 | +-----------------------+ | |
4452 | | user data | | |
4453 | | | | |
4454 | | | | |
4455 | +-----------------------+ */ | |
4456 | ||
4457 | struct mmap_region | |
4458 | { | |
4459 | /* User-specified size. */ | |
4460 | size_t nbytes_specified; | |
177c0ea7 | 4461 | |
b86af064 GM |
4462 | /* Number of bytes mapped */ |
4463 | size_t nbytes_mapped; | |
4464 | ||
4465 | /* Pointer to the location holding the address of the memory | |
4466 | allocated with the mmap'd block. The variable actually points | |
4467 | after this structure. */ | |
4468 | POINTER_TYPE **var; | |
4469 | ||
4470 | /* Next and previous in list of all mmap'd regions. */ | |
4471 | struct mmap_region *next, *prev; | |
4472 | }; | |
4473 | ||
4474 | /* Doubly-linked list of mmap'd regions. */ | |
4475 | ||
4476 | static struct mmap_region *mmap_regions; | |
4477 | ||
4478 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4479 | /dev/zero will be opened on it. */ | |
4480 | ||
4481 | static int mmap_fd; | |
4482 | ||
4483 | /* Temporary storage for mmap_set_vars, see there. */ | |
4484 | ||
4485 | static struct mmap_region *mmap_regions_1; | |
4486 | static int mmap_fd_1; | |
4487 | ||
4488 | /* Page size on this system. */ | |
4489 | ||
4490 | static int mmap_page_size; | |
4491 | ||
4492 | /* 1 means mmap has been intialized. */ | |
4493 | ||
4494 | static int mmap_initialized_p; | |
4495 | ||
4496 | /* Value is X rounded up to the next multiple of N. */ | |
4497 | ||
4498 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4499 | ||
4500 | /* Size of mmap_region structure plus padding. */ | |
4501 | ||
4502 | #define MMAP_REGION_STRUCT_SIZE \ | |
4503 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4504 | ||
4505 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4506 | region, return a pointer to the start of the region. */ | |
4507 | ||
4508 | #define MMAP_REGION(P) \ | |
4509 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4510 | ||
4511 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4512 | to the start of the user-visible part of the region. */ | |
4513 | ||
4514 | #define MMAP_USER_AREA(P) \ | |
4515 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4516 | ||
4517 | #define MEM_ALIGN sizeof (double) | |
4518 | ||
7273faa1 DL |
4519 | /* Predicate returning true if part of the address range [START .. END] |
4520 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4521 | memory mapping. |
4522 | ||
4523 | Default is to conservativly assume the address range is occupied by | |
4524 | something else. This can be overridden by system configuration | |
4525 | files if system-specific means to determine this exists. */ | |
4526 | ||
4527 | #ifndef MMAP_ALLOCATED_P | |
4528 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4529 | #endif | |
4530 | ||
b86af064 GM |
4531 | /* Function prototypes. */ |
4532 | ||
f57e2426 J |
4533 | static int mmap_free_1 (struct mmap_region *); |
4534 | static int mmap_enlarge (struct mmap_region *, int); | |
4535 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4536 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4537 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4538 | static void mmap_free (POINTER_TYPE **ptr); | |
4539 | static void mmap_init (void); | |
b86af064 GM |
4540 | |
4541 | ||
4542 | /* Return a region overlapping address range START...END, or null if | |
4543 | none. END is not including, i.e. the last byte in the range | |
4544 | is at END - 1. */ | |
4545 | ||
4546 | static struct mmap_region * | |
4547 | mmap_find (start, end) | |
4548 | POINTER_TYPE *start, *end; | |
4549 | { | |
4550 | struct mmap_region *r; | |
4551 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4552 | |
b86af064 GM |
4553 | for (r = mmap_regions; r; r = r->next) |
4554 | { | |
4555 | char *rstart = (char *) r; | |
4556 | char *rend = rstart + r->nbytes_mapped; | |
4557 | ||
4558 | if (/* First byte of range, i.e. START, in this region? */ | |
4559 | (s >= rstart && s < rend) | |
4560 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4561 | || (e > rstart && e <= rend) | |
4562 | /* First byte of this region in the range? */ | |
4563 | || (rstart >= s && rstart < e) | |
4564 | /* Last byte of this region in the range? */ | |
4565 | || (rend > s && rend <= e)) | |
4566 | break; | |
4567 | } | |
4568 | ||
4569 | return r; | |
4570 | } | |
4571 | ||
4572 | ||
4573 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4574 | the region. Value is non-zero if successful. */ | |
4575 | ||
4576 | static int | |
4577 | mmap_free_1 (r) | |
4578 | struct mmap_region *r; | |
4579 | { | |
4580 | if (r->next) | |
4581 | r->next->prev = r->prev; | |
4582 | if (r->prev) | |
4583 | r->prev->next = r->next; | |
4584 | else | |
4585 | mmap_regions = r->next; | |
177c0ea7 | 4586 | |
1a15cca0 | 4587 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4588 | { |
4589 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4590 | return 0; | |
4591 | } | |
4592 | ||
4593 | return 1; | |
4594 | } | |
4595 | ||
4596 | ||
4597 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4598 | Value is non-zero if successful. */ | |
4599 | ||
4600 | static int | |
4601 | mmap_enlarge (r, npages) | |
4602 | struct mmap_region *r; | |
4603 | int npages; | |
4604 | { | |
4605 | char *region_end = (char *) r + r->nbytes_mapped; | |
4606 | size_t nbytes; | |
4607 | int success = 0; | |
4608 | ||
4609 | if (npages < 0) | |
4610 | { | |
4611 | /* Unmap pages at the end of the region. */ | |
4612 | nbytes = - npages * mmap_page_size; | |
4613 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4614 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4615 | else | |
4616 | { | |
4617 | r->nbytes_mapped -= nbytes; | |
4618 | success = 1; | |
4619 | } | |
4620 | } | |
4621 | else if (npages > 0) | |
4622 | { | |
b86af064 | 4623 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4624 | |
b86af064 GM |
4625 | /* Try to map additional pages at the end of the region. We |
4626 | cannot do this if the address range is already occupied by | |
4627 | something else because mmap deletes any previous mapping. | |
4628 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4629 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4630 | { |
4631 | POINTER_TYPE *p; | |
177c0ea7 | 4632 | |
b86af064 GM |
4633 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4634 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4635 | if (p == MAP_FAILED) | |
edaa9aed | 4636 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4637 | else if (p != (POINTER_TYPE *) region_end) |
4638 | { | |
4639 | /* Kernels are free to choose a different address. In | |
4640 | that case, unmap what we've mapped above; we have | |
4641 | no use for it. */ | |
4642 | if (munmap (p, nbytes) == -1) | |
4643 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4644 | } | |
4645 | else | |
4646 | { | |
4647 | r->nbytes_mapped += nbytes; | |
4648 | success = 1; | |
4649 | } | |
4650 | } | |
4651 | } | |
4652 | ||
4653 | return success; | |
4654 | } | |
4655 | ||
4656 | ||
4657 | /* Set or reset variables holding references to mapped regions. If | |
4658 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4659 | non-zero, set all variables to the start of the user-areas | |
4660 | of mapped regions. | |
4661 | ||
4662 | This function is called from Fdump_emacs to ensure that the dumped | |
4663 | Emacs doesn't contain references to memory that won't be mapped | |
4664 | when Emacs starts. */ | |
4665 | ||
4666 | void | |
4667 | mmap_set_vars (restore_p) | |
4668 | int restore_p; | |
4669 | { | |
4670 | struct mmap_region *r; | |
4671 | ||
4672 | if (restore_p) | |
4673 | { | |
4674 | mmap_regions = mmap_regions_1; | |
4675 | mmap_fd = mmap_fd_1; | |
4676 | for (r = mmap_regions; r; r = r->next) | |
4677 | *r->var = MMAP_USER_AREA (r); | |
4678 | } | |
4679 | else | |
4680 | { | |
4681 | for (r = mmap_regions; r; r = r->next) | |
4682 | *r->var = NULL; | |
4683 | mmap_regions_1 = mmap_regions; | |
4684 | mmap_regions = NULL; | |
4685 | mmap_fd_1 = mmap_fd; | |
4686 | mmap_fd = -1; | |
4687 | } | |
4688 | } | |
4689 | ||
4690 | ||
4691 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4692 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4693 | address of some variable which will use the data area. | |
4694 | ||
4695 | The allocation of 0 bytes is valid. | |
4696 | ||
4697 | If we can't allocate the necessary memory, set *VAR to null, and | |
4698 | return null. */ | |
4699 | ||
4700 | static POINTER_TYPE * | |
4701 | mmap_alloc (var, nbytes) | |
4702 | POINTER_TYPE **var; | |
4703 | size_t nbytes; | |
4704 | { | |
4705 | void *p; | |
4706 | size_t map; | |
4707 | ||
4708 | mmap_init (); | |
4709 | ||
4710 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4711 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4712 | mmap_fd, 0); | |
177c0ea7 | 4713 | |
b86af064 GM |
4714 | if (p == MAP_FAILED) |
4715 | { | |
4716 | if (errno != ENOMEM) | |
4717 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4718 | p = NULL; | |
4719 | } | |
4720 | else | |
4721 | { | |
4722 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4723 | |
b86af064 GM |
4724 | r->nbytes_specified = nbytes; |
4725 | r->nbytes_mapped = map; | |
4726 | r->var = var; | |
4727 | r->prev = NULL; | |
4728 | r->next = mmap_regions; | |
4729 | if (r->next) | |
4730 | r->next->prev = r; | |
4731 | mmap_regions = r; | |
177c0ea7 | 4732 | |
b86af064 GM |
4733 | p = MMAP_USER_AREA (p); |
4734 | } | |
177c0ea7 | 4735 | |
b86af064 GM |
4736 | return *var = p; |
4737 | } | |
4738 | ||
4739 | ||
4740 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4741 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4742 | and return this value. If more memory cannot be allocated, then | |
4743 | leave *VAR unchanged, and return null. */ | |
4744 | ||
4745 | static POINTER_TYPE * | |
4746 | mmap_realloc (var, nbytes) | |
4747 | POINTER_TYPE **var; | |
4748 | size_t nbytes; | |
4749 | { | |
4750 | POINTER_TYPE *result; | |
177c0ea7 | 4751 | |
b86af064 GM |
4752 | mmap_init (); |
4753 | ||
4754 | if (*var == NULL) | |
4755 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4756 | else if (nbytes == 0) |
b86af064 GM |
4757 | { |
4758 | mmap_free (var); | |
4759 | result = mmap_alloc (var, nbytes); | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | struct mmap_region *r = MMAP_REGION (*var); | |
4764 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4765 | |
b86af064 GM |
4766 | if (room < nbytes) |
4767 | { | |
4768 | /* Must enlarge. */ | |
4769 | POINTER_TYPE *old_ptr = *var; | |
4770 | ||
4771 | /* Try to map additional pages at the end of the region. | |
4772 | If that fails, allocate a new region, copy data | |
4773 | from the old region, then free it. */ | |
4774 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4775 | / mmap_page_size))) | |
4776 | { | |
4777 | r->nbytes_specified = nbytes; | |
4778 | *var = result = old_ptr; | |
4779 | } | |
4780 | else if (mmap_alloc (var, nbytes)) | |
4781 | { | |
72af86bd | 4782 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4783 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4784 | result = *var; | |
4785 | r = MMAP_REGION (result); | |
4786 | r->nbytes_specified = nbytes; | |
4787 | } | |
4788 | else | |
4789 | { | |
4790 | *var = old_ptr; | |
4791 | result = NULL; | |
4792 | } | |
4793 | } | |
4794 | else if (room - nbytes >= mmap_page_size) | |
4795 | { | |
4796 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4797 | memory back to the system. |
4798 | ||
4799 | The extra parens are to make the division happens first, | |
4800 | on positive values, so we know it will round towards | |
4801 | zero. */ | |
bb63c5c9 | 4802 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4803 | result = *var; |
4804 | r->nbytes_specified = nbytes; | |
4805 | } | |
4806 | else | |
4807 | { | |
4808 | /* Leave it alone. */ | |
4809 | result = *var; | |
4810 | r->nbytes_specified = nbytes; | |
4811 | } | |
4812 | } | |
4813 | ||
4814 | return result; | |
4815 | } | |
4816 | ||
4817 | ||
4818 | /* Free a block of relocatable storage whose data is pointed to by | |
4819 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4820 | ||
4821 | static void | |
4822 | mmap_free (var) | |
4823 | POINTER_TYPE **var; | |
4824 | { | |
4825 | mmap_init (); | |
177c0ea7 | 4826 | |
b86af064 GM |
4827 | if (*var) |
4828 | { | |
4829 | mmap_free_1 (MMAP_REGION (*var)); | |
4830 | *var = NULL; | |
4831 | } | |
4832 | } | |
4833 | ||
4834 | ||
4835 | /* Perform necessary intializations for the use of mmap. */ | |
4836 | ||
4837 | static void | |
4838 | mmap_init () | |
4839 | { | |
4840 | #if MAP_ANON == 0 | |
4841 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4842 | in a dumped Emacs. */ | |
4843 | if (mmap_fd <= 0) | |
4844 | { | |
4845 | /* No anonymous mmap -- we need the file descriptor. */ | |
4846 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4847 | if (mmap_fd == -1) | |
4848 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4849 | } | |
4850 | #endif /* MAP_ANON == 0 */ | |
4851 | ||
4852 | if (mmap_initialized_p) | |
4853 | return; | |
4854 | mmap_initialized_p = 1; | |
177c0ea7 | 4855 | |
b86af064 GM |
4856 | #if MAP_ANON != 0 |
4857 | mmap_fd = -1; | |
4858 | #endif | |
177c0ea7 | 4859 | |
b86af064 GM |
4860 | mmap_page_size = getpagesize (); |
4861 | } | |
4862 | ||
4863 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4864 | ||
4865 | ||
4866 | \f | |
4867 | /*********************************************************************** | |
4868 | Buffer-text Allocation | |
4869 | ***********************************************************************/ | |
4870 | ||
4871 | #ifdef REL_ALLOC | |
f57e2426 J |
4872 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4873 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4874 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4875 | #endif /* REL_ALLOC */ |
4876 | ||
4877 | ||
4878 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4879 | ||
4880 | static void | |
d3da34e0 | 4881 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4882 | { |
4883 | POINTER_TYPE *p; | |
177c0ea7 | 4884 | |
b86af064 GM |
4885 | BLOCK_INPUT; |
4886 | #if defined USE_MMAP_FOR_BUFFERS | |
4887 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4888 | #elif defined REL_ALLOC | |
4889 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4890 | #else | |
815add84 | 4891 | p = xmalloc (nbytes); |
b86af064 | 4892 | #endif |
177c0ea7 | 4893 | |
b86af064 GM |
4894 | if (p == NULL) |
4895 | { | |
4896 | UNBLOCK_INPUT; | |
4897 | memory_full (); | |
4898 | } | |
4899 | ||
4900 | b->text->beg = (unsigned char *) p; | |
4901 | UNBLOCK_INPUT; | |
4902 | } | |
4903 | ||
4904 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4905 | shrink it. */ | |
4906 | ||
4907 | void | |
5371d722 | 4908 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4909 | { |
4910 | POINTER_TYPE *p; | |
4911 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4912 | + delta); | |
4913 | BLOCK_INPUT; | |
4914 | #if defined USE_MMAP_FOR_BUFFERS | |
4915 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4916 | #elif defined REL_ALLOC | |
4917 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4918 | #else | |
4919 | p = xrealloc (b->text->beg, nbytes); | |
4920 | #endif | |
177c0ea7 | 4921 | |
b86af064 GM |
4922 | if (p == NULL) |
4923 | { | |
4924 | UNBLOCK_INPUT; | |
4925 | memory_full (); | |
4926 | } | |
4927 | ||
4928 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4929 | UNBLOCK_INPUT; | |
4930 | } | |
4931 | ||
4932 | ||
4933 | /* Free buffer B's text buffer. */ | |
4934 | ||
4935 | static void | |
d3da34e0 | 4936 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4937 | { |
4938 | BLOCK_INPUT; | |
4939 | ||
4940 | #if defined USE_MMAP_FOR_BUFFERS | |
4941 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4942 | #elif defined REL_ALLOC | |
4943 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4944 | #else | |
4945 | xfree (b->text->beg); | |
4946 | #endif | |
177c0ea7 | 4947 | |
b86af064 GM |
4948 | BUF_BEG_ADDR (b) = NULL; |
4949 | UNBLOCK_INPUT; | |
4950 | } | |
4951 | ||
4952 | ||
4953 | \f | |
4954 | /*********************************************************************** | |
4955 | Initialization | |
4956 | ***********************************************************************/ | |
4957 | ||
dfcf069d | 4958 | void |
d3da34e0 | 4959 | init_buffer_once (void) |
1ab256cb | 4960 | { |
7c02e886 GM |
4961 | int idx; |
4962 | ||
72af86bd | 4963 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4964 | |
1ab256cb RM |
4965 | /* Make sure all markable slots in buffer_defaults |
4966 | are initialized reasonably, so mark_buffer won't choke. */ | |
4967 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4968 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4969 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4970 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4971 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4972 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4973 | /* Prevent GC from getting confused. */ |
4974 | buffer_defaults.text = &buffer_defaults.own_text; | |
4975 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4976 | BUF_INTERVALS (&buffer_defaults) = 0; |
4977 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 4978 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 4979 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 4980 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 4981 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4982 | |
4983 | /* Set up the default values of various buffer slots. */ | |
4984 | /* Must do these before making the first buffer! */ | |
4985 | ||
f532dca0 | 4986 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4987 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4988 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4989 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4990 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4991 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4992 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4993 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 4994 | #ifndef old |
4b4deea2 | 4995 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 4996 | #endif |
4b4deea2 TT |
4997 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4998 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4999 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
5000 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
5001 | BVAR (&buffer_defaults, file_format) = Qnil; | |
5002 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
5003 | buffer_defaults.overlays_before = NULL; |
5004 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5005 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5006 | |
4b4deea2 TT |
5007 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
5008 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
5009 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
5010 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
5011 | BVAR (&buffer_defaults, bidi_display_reordering) = Qnil; | |
5012 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; | |
5013 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
5014 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
5015 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 5016 | |
4b4deea2 TT |
5017 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
5018 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
5019 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
5020 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
5021 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
5022 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
5023 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
5024 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5025 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
5026 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
5027 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
5028 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
5029 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
5030 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
5031 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
5032 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
5033 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
5034 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
5035 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
5036 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
5037 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
5038 | |
5039 | /* Assign the local-flags to the slots that have default values. | |
5040 | The local flag is a bit that is used in the buffer | |
5041 | to say that it has its own local value for the slot. | |
5042 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5043 | ||
5044 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5045 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5046 | |
5047 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5048 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
5049 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
5050 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
5051 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
5052 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
5053 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
5054 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
5055 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
5056 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
5057 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
5058 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
5059 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
5060 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
5061 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
5062 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
5063 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
5064 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
5065 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
5066 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 5067 | |
7c02e886 | 5068 | idx = 1; |
4b4deea2 TT |
5069 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5070 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5071 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5072 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5073 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5074 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 5075 | #ifndef old |
4b4deea2 | 5076 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
54ad07d3 | 5077 | #endif |
4b4deea2 TT |
5078 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5079 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5080 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5081 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5082 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5083 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5084 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5085 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5086 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5087 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5088 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5089 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5090 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5091 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5092 | /* Make this one a permanent local. */ |
7c02e886 | 5093 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5094 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5095 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5096 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5097 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5098 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5099 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5100 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5101 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5102 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5103 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5104 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5105 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5106 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5107 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5108 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5109 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5110 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5111 | |
5112 | /* Need more room? */ | |
7313acd0 | 5113 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5114 | abort (); |
7313acd0 | 5115 | last_per_buffer_idx = idx; |
177c0ea7 | 5116 | |
1ab256cb RM |
5117 | Vbuffer_alist = Qnil; |
5118 | current_buffer = 0; | |
5119 | all_buffers = 0; | |
5120 | ||
f4265f6c | 5121 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5122 | |
d67b4f80 | 5123 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5124 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5125 | |
d67b4f80 | 5126 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5127 | |
d67b4f80 | 5128 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5129 | |
d67b4f80 | 5130 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5131 | |
d67b4f80 | 5132 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5133 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5134 | |
d67b4f80 | 5135 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5136 | |
1ab256cb | 5137 | /* super-magic invisible buffer */ |
d67b4f80 | 5138 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5139 | Vbuffer_alist = Qnil; |
5140 | ||
d67b4f80 | 5141 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5142 | |
5143 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5144 | } |
5145 | ||
dfcf069d | 5146 | void |
d3da34e0 | 5147 | init_buffer (void) |
1ab256cb | 5148 | { |
2381d133 | 5149 | char *pwd; |
136351b7 | 5150 | Lisp_Object temp; |
b639c9be | 5151 | int len; |
1ab256cb | 5152 | |
b86af064 | 5153 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5154 | { |
5155 | /* When using the ralloc implementation based on mmap(2), buffer | |
5156 | text pointers will have been set to null in the dumped Emacs. | |
5157 | Map new memory. */ | |
5158 | struct buffer *b; | |
177c0ea7 | 5159 | |
93c27ef1 GM |
5160 | for (b = all_buffers; b; b = b->next) |
5161 | if (b->text->beg == NULL) | |
b86af064 | 5162 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5163 | } |
b86af064 | 5164 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5165 | |
1ab256cb | 5166 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5167 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5168 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5169 | |
01537133 | 5170 | pwd = get_current_dir_name (); |
a17b5ed1 | 5171 | |
156bdb41 | 5172 | if (!pwd) |
a17b5ed1 | 5173 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5174 | |
1ab256cb RM |
5175 | /* Maybe this should really use some standard subroutine |
5176 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5177 | len = strlen (pwd); |
5178 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5179 | { |
156bdb41 | 5180 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5181 | pwd = (char *) realloc (pwd, len + 2); |
5182 | if (!pwd) | |
5183 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5184 | pwd[len] = DIRECTORY_SEP; |
5185 | pwd[len + 1] = '\0'; | |
f7975d07 | 5186 | } |
0995fa35 | 5187 | |
4b4deea2 TT |
5188 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5189 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5190 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5191 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5192 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5193 | BVAR (current_buffer, directory) |
5194 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5195 | |
0995fa35 RS |
5196 | /* Add /: to the front of the name |
5197 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5198 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5199 | if (! NILP (temp) |
5200 | /* If the default dir is just /, TEMP is non-nil | |
5201 | because of the ange-ftp completion handler. | |
5202 | However, it is not necessary to turn / into /:/. | |
5203 | So avoid doing that. */ | |
4b4deea2 TT |
5204 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5205 | BVAR (current_buffer, directory) | |
5206 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5207 | |
136351b7 | 5208 | temp = get_minibuffer (0); |
4b4deea2 | 5209 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5210 | |
5211 | free (pwd); | |
1ab256cb RM |
5212 | } |
5213 | ||
d6aa1876 SM |
5214 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5215 | Object stored in the current buffer. address is the address of the slot | |
5216 | in the buffer that is current now. */ | |
5217 | ||
5218 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5219 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5220 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5221 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5222 | VNAME is the name of the buffer slot. |
5223 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5224 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5225 | do { \ | |
5226 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5227 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5228 | } while (0) |
d6aa1876 SM |
5229 | |
5230 | static void | |
8ea90aa3 | 5231 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5232 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5233 | { |
ce5b453a | 5234 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5235 | int offset; |
5236 | ||
ce5b453a | 5237 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5238 | offset = (char *)address - (char *)current_buffer; |
5239 | ||
ce5b453a SM |
5240 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5241 | bo_fwd->offset = offset; | |
5242 | bo_fwd->slottype = type; | |
b9598260 | 5243 | sym->declared_special = 1; |
ce5b453a SM |
5244 | sym->redirect = SYMBOL_FORWARDED; |
5245 | { | |
5246 | /* I tried to do the job without a cast, but it seems impossible. | |
5247 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5248 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5249 | } | |
5250 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5251 | |
5252 | if (PER_BUFFER_IDX (offset) == 0) | |
5253 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5254 | slot of buffer_local_flags */ | |
5255 | abort (); | |
5256 | } | |
5257 | ||
5258 | ||
1ab256cb | 5259 | /* initialize the buffer routines */ |
dfcf069d | 5260 | void |
d3da34e0 | 5261 | syms_of_buffer (void) |
1ab256cb | 5262 | { |
9115729e KH |
5263 | staticpro (&last_overlay_modification_hooks); |
5264 | last_overlay_modification_hooks | |
5265 | = Fmake_vector (make_number (10), Qnil); | |
5266 | ||
1ab256cb RM |
5267 | staticpro (&Vbuffer_defaults); |
5268 | staticpro (&Vbuffer_local_symbols); | |
5269 | staticpro (&Qfundamental_mode); | |
5270 | staticpro (&Qmode_class); | |
5271 | staticpro (&QSFundamental); | |
5272 | staticpro (&Vbuffer_alist); | |
5273 | staticpro (&Qprotected_field); | |
5274 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5275 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5276 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5277 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5278 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5279 | staticpro (&Qoverlayp); |
d67b4f80 | 5280 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5281 | staticpro (&Qevaporate); |
d67b4f80 | 5282 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5283 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5284 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5285 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5286 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5287 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5288 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5289 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5290 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5291 | staticpro (&Qpriority); |
d67b4f80 | 5292 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5293 | staticpro (&Qbefore_string); |
d67b4f80 | 5294 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5295 | staticpro (&Qafter_string); |
d67b4f80 | 5296 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5297 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5298 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5299 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5300 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5301 | staticpro (&Qafter_change_functions); |
2f7a359d | 5302 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5303 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5304 | |
d67b4f80 | 5305 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5306 | staticpro (&Qkill_buffer_query_functions); |
5307 | ||
1ab256cb | 5308 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5309 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5310 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5311 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5312 | |
422745d0 TT |
5313 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5314 | mode_line_format, | |
5315 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5316 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5317 | |
422745d0 TT |
5318 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5319 | header_line_format, | |
5320 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5321 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5322 | |
422745d0 TT |
5323 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5324 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5325 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5326 | |
422745d0 TT |
5327 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5328 | extra_line_spacing, | |
5329 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5330 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5331 | |
422745d0 TT |
5332 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5333 | cursor_in_non_selected_windows, | |
5334 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5335 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5336 | ||
422745d0 TT |
5337 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5338 | abbrev_mode, | |
5339 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5340 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5341 | |
422745d0 TT |
5342 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5343 | ctl_arrow, | |
5344 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5345 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5346 | |
422745d0 TT |
5347 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5348 | enable_multibyte_characters, | |
5349 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5350 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5351 | |
422745d0 TT |
5352 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5353 | buffer_file_coding_system, | |
5354 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5355 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5356 | |
422745d0 TT |
5357 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5358 | truncate_lines, | |
5359 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5360 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5361 | |
422745d0 TT |
5362 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5363 | fill_column, | |
5364 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5365 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5366 | |
422745d0 TT |
5367 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5368 | left_margin, | |
5369 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5370 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5371 | |
422745d0 TT |
5372 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5373 | tab_width, | |
5374 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5375 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5376 | |
422745d0 TT |
5377 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5378 | case_fold_search, | |
5379 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5380 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5381 | |
422745d0 TT |
5382 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5383 | left_margin_cols, | |
5384 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5385 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5386 | |
422745d0 TT |
5387 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5388 | right_margin_cols, | |
5389 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5390 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5391 | |
422745d0 TT |
5392 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5393 | left_fringe_width, | |
5394 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5395 | This is the same as (default-value 'left-fringe-width). */); |
5396 | ||
422745d0 TT |
5397 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5398 | right_fringe_width, | |
5399 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5400 | This is the same as (default-value 'right-fringe-width). */); |
5401 | ||
422745d0 TT |
5402 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5403 | fringes_outside_margins, | |
5404 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5405 | This is the same as (default-value 'fringes-outside-margins). */); |
5406 | ||
422745d0 TT |
5407 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5408 | scroll_bar_width, | |
5409 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5410 | This is the same as (default-value 'scroll-bar-width). */); |
5411 | ||
422745d0 TT |
5412 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5413 | vertical_scroll_bar_type, | |
5414 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5415 | This is the same as (default-value 'vertical-scroll-bar). */); |
5416 | ||
422745d0 TT |
5417 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5418 | indicate_empty_lines, | |
5419 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5420 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5421 | |
422745d0 TT |
5422 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5423 | indicate_buffer_boundaries, | |
5424 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5425 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5426 | ||
422745d0 TT |
5427 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5428 | fringe_indicator_alist, | |
5429 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5430 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5431 | ||
422745d0 TT |
5432 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5433 | fringe_cursor_alist, | |
5434 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5435 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5436 | ||
422745d0 TT |
5437 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5438 | scroll_up_aggressively, | |
5439 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5440 | This value applies in buffers that don't have their own local values. |
fc961256 | 5441 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5442 | |
422745d0 TT |
5443 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5444 | scroll_down_aggressively, | |
5445 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5446 | This value applies in buffers that don't have their own local values. |
fc961256 | 5447 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5448 | |
045dee35 | 5449 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5450 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5451 | Qnil, |
7614d762 RS |
5452 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5453 | The header line appears, optionally, at the top of a window; | |
5454 | the mode line appears at the bottom. */); | |
177c0ea7 | 5455 | |
4b4deea2 | 5456 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5457 | Qnil, |
5458 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5459 | Each buffer has its own value of this variable. |
5460 | Value may be nil, a string, a symbol or a list or cons cell. | |
5461 | A value of nil means don't display a mode line. | |
5462 | For a symbol, its value is used (but it is ignored if t or nil). | |
5463 | A string appearing directly as the value of a symbol is processed verbatim | |
5464 | in that the %-constructs below are not recognized. | |
ed463255 | 5465 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5466 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5467 | in the value of that symbol will be ignored. |
018ba359 | 5468 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5469 | is used as a mode line element. Be careful--FORM should not load any files, |
5470 | because that can cause an infinite recursion. | |
ed463255 KS |
5471 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5472 | with the specified properties PROPS applied. | |
018ba359 PJ |
5473 | For a list whose car is a symbol, the symbol's value is taken, |
5474 | and if that is non-nil, the cadr of the list is processed recursively. | |
5475 | Otherwise, the caddr of the list (if there is one) is processed. | |
5476 | For a list whose car is a string or list, each element is processed | |
5477 | recursively and the results are effectively concatenated. | |
5478 | For a list whose car is an integer, the cdr of the list is processed | |
5479 | and padded (if the number is positive) or truncated (if negative) | |
5480 | to the width specified by that number. | |
5481 | A string is printed verbatim in the mode line except for %-constructs: | |
5482 | (%-constructs are allowed when the string is the entire mode-line-format | |
5483 | or when it is found in a cons-cell or a list) | |
5484 | %b -- print buffer name. %f -- print visited file name. | |
5485 | %F -- print frame name. | |
5486 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5487 | %& is like %*, but ignore read-only-ness. | |
5488 | % means buffer is read-only and * means it is modified. | |
5489 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5490 | %s -- print process status. %l -- print the current line number. | |
5491 | %c -- print the current column number (this makes editing slower). | |
5492 | To make the column number update correctly in all cases, | |
5493 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5494 | %i -- print the size of the buffer. |
5495 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5496 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5497 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5498 | or print Bottom or All. | |
018ba359 | 5499 | %n -- print Narrow if appropriate. |
dafbe726 | 5500 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5501 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5502 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5503 | %e -- print error message about full memory. |
f7165034 NR |
5504 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5505 | remote machine. | |
018ba359 PJ |
5506 | %[ -- print one [ for each recursive editing level. %] similar. |
5507 | %% -- print %. %- -- print infinitely many dashes. | |
5508 | Decimal digits after the % specify field width to which to pad. */); | |
5509 | ||
422745d0 TT |
5510 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
5511 | doc: /* *Value of `major-mode' for new buffers. */); | |
1ab256cb | 5512 | |
4b4deea2 | 5513 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5514 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5515 | doc: /* Symbol for current buffer's major mode. |
5516 | The default value (normally `fundamental-mode') affects new buffers. | |
5517 | A value of nil means to use the current buffer's major mode, provided | |
5518 | it is not marked as "special". | |
5519 | ||
5520 | When a mode is used by default, `find-file' switches to it before it | |
5521 | reads the contents into the buffer and before it finishes setting up | |
5522 | the buffer. Thus, the mode and its hooks should not expect certain | |
5523 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5524 | to be set up. */); | |
1ab256cb | 5525 | |
4b4deea2 | 5526 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5527 | Qnil, |
64a7c220 | 5528 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5529 | Usually a string, but can use any of the constructs for `mode-line-format', |
5530 | which see. | |
5531 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5532 | |
4b4deea2 | 5533 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5534 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5535 | ||
4b4deea2 | 5536 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5537 | doc: /* Non-nil if Abbrev mode is enabled. |
5538 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5539 | |
4b4deea2 | 5540 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5541 | Qnil, |
efc7e75f | 5542 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5543 | |
4b4deea2 | 5544 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5545 | make_number (LISP_INT_TAG), |
1ac5826d | 5546 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5547 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5548 | |
4b4deea2 | 5549 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5550 | make_number (LISP_INT_TAG), |
fc961256 | 5551 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5552 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5553 | |
4b4deea2 | 5554 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5555 | make_number (LISP_INT_TAG), |
efc7e75f | 5556 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5557 | |
4b4deea2 | 5558 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
efc7e75f | 5559 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5560 | A value of nil means use backslash and octal digits. |
5561 | This variable does not apply to characters whose display is specified | |
5562 | in the current display table (if there is one). */); | |
1ab256cb | 5563 | |
3b06f880 | 5564 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5565 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5566 | Qnil, |
efc7e75f | 5567 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5568 | Otherwise they are regarded as unibyte. This affects the display, |
5569 | file I/O and the behavior of various editing commands. | |
5570 | ||
5571 | This variable is buffer-local but you cannot set it directly; | |
5572 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5573 | Changing its default value with `setq-default' is supported. | |
5574 | See also variable `default-enable-multibyte-characters' and Info node | |
5575 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5576 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5577 | |
c71b5d9b | 5578 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5579 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5580 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5581 | This variable applies to saving the buffer, and also to `write-region' |
5582 | and other functions that use `write-region'. | |
5583 | It does not apply to sending output to subprocesses, however. | |
5584 | ||
5585 | If this is nil, the buffer is saved without any code conversion | |
5586 | unless some coding system is specified in `file-coding-system-alist' | |
5587 | for the buffer file. | |
5588 | ||
31a6cb06 EZ |
5589 | If the text to be saved cannot be encoded as specified by this variable, |
5590 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5591 | ||
018ba359 PJ |
5592 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5593 | ||
5594 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5595 | |
f44e260c | 5596 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5597 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5598 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5599 | |
6c0cf218 | 5600 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5601 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
b44d9321 | 5602 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5603 | |
b44d9321 EZ |
5604 | If this is nil (the default), the direction of each paragraph is |
5605 | determined by the first strong directional character of its text. | |
5606 | The values of `right-to-left' and `left-to-right' override that. | |
5607 | Any other value is treated as nil. | |
b4bf28b7 | 5608 | |
b44d9321 EZ |
5609 | This variable has no effect unless the buffer's value of |
5610 | \`bidi-display-reordering' is non-nil. */); | |
5611 | ||
4b4deea2 | 5612 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
7614d762 RS |
5613 | doc: /* *Non-nil means do not display continuation lines. |
5614 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5615 | |
5616 | Note that this is overridden by the variable | |
5617 | `truncate-partial-width-windows' if that variable is non-nil | |
5618 | and this buffer is not full-frame width. */); | |
1ab256cb | 5619 | |
4b4deea2 | 5620 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
0858cd02 CY |
5621 | doc: /* *Non-nil means to use word-wrapping for continuation lines. |
5622 | When word-wrapping is on, continuation lines are wrapped at the space | |
5623 | or tab character nearest to the right window edge. | |
5624 | If nil, continuation lines are wrapped at the right screen edge. | |
5625 | ||
5626 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5627 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5628 | word-wrapping, you might want to reduce the value of | |
5629 | `truncate-partial-width-windows', since wrapping can make text readable | |
5630 | in narrower windows. */); | |
0858cd02 | 5631 | |
4b4deea2 | 5632 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5633 | make_number (Lisp_String), |
efc7e75f | 5634 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5635 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5636 | |
4b4deea2 | 5637 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5638 | Qnil, |
efc7e75f | 5639 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5640 | It is called after self-inserting any character specified in |
5641 | the `auto-fill-chars' table. | |
5642 | NOTE: This variable is not a hook; | |
5643 | its value may not be a list of functions. */); | |
1ab256cb | 5644 | |
4b4deea2 | 5645 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5646 | make_number (Lisp_String), |
efc7e75f | 5647 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5648 | |
4b4deea2 | 5649 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5650 | make_number (Lisp_String), |
efc7e75f | 5651 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5652 | The truename of a file is calculated by `file-truename' |
5653 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5654 | |
1ab256cb | 5655 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5656 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5657 | make_number (Lisp_String), |
7614d762 RS |
5658 | doc: /* Name of file for auto-saving current buffer. |
5659 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5660 | |
4b4deea2 | 5661 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5662 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5663 | |
4b4deea2 | 5664 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5665 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5666 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5667 | |
4b4deea2 | 5668 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5669 | make_number (LISP_INT_TAG), |
efc7e75f | 5670 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5671 | 0 initially. |
5672 | -1 means auto-saving turned off until next real save. | |
5673 | ||
5674 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5675 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5676 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5677 | |
4b4deea2 | 5678 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5679 | Qnil, |
7614d762 | 5680 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5681 | An integer N as value means display only lines |
5682 | that start with less than N columns of space. | |
7614d762 RS |
5683 | A value of t means that the character ^M makes itself and |
5684 | all the rest of the line invisible; also, when saving the buffer | |
5685 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5686 | |
5687 | #ifndef old | |
5688 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5689 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5690 | Qnil, |
3f676284 | 5691 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5692 | #endif |
5693 | ||
4b4deea2 | 5694 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5695 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5696 | The value should be one of `overwrite-mode-textual', |
5697 | `overwrite-mode-binary', or nil. | |
5698 | If it is `overwrite-mode-textual', self-insertion still | |
5699 | inserts at the end of a line, and inserts when point is before a tab, | |
5700 | until the tab is filled in. | |
5701 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5702 | ||
4b4deea2 | 5703 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5704 | Qnil, |
efc7e75f | 5705 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5706 | |
5707 | If this variable is nil, the value of `standard-display-table' is used. | |
5708 | Each window can have its own, overriding display table, see | |
5709 | `set-window-display-table' and `window-display-table'. | |
5710 | ||
5711 | The display table is a char-table created with `make-display-table'. | |
5712 | A char-table is an array indexed by character codes. Normal array | |
5713 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5714 | ||
5715 | Each of the char-table elements control how to display the corresponding | |
5716 | text character: the element at index C in the table says how to display | |
5717 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5718 | characters or nil. The value nil means display the character in the |
5719 | default fashion; otherwise, the characters from the vector are delivered | |
5720 | to the screen instead of the original character. | |
018ba359 | 5721 | |
5fd11dc8 | 5722 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5723 | to display a capital Y instead of each X character. |
018ba359 PJ |
5724 | |
5725 | In addition, a char-table has six extra slots to control the display of: | |
5726 | ||
5727 | the end of a truncated screen line (extra-slot 0, a single character); | |
5728 | the end of a continued line (extra-slot 1, a single character); | |
5729 | the escape character used to display character codes in octal | |
5730 | (extra-slot 2, a single character); | |
5731 | the character used as an arrow for control characters (extra-slot 3, | |
5732 | a single character); | |
5733 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5734 | a vector of characters); | |
5735 | the character used to draw the border between side-by-side windows | |
5736 | (extra-slot 5, a single character). | |
5737 | ||
5738 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5739 | |
4b4deea2 | 5740 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5741 | Qnil, |
efc7e75f | 5742 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5743 | A value of nil means no marginal area. */); |
177c0ea7 | 5744 | |
4b4deea2 | 5745 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5746 | Qnil, |
efc7e75f | 5747 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5748 | A value of nil means no marginal area. */); |
177c0ea7 | 5749 | |
4b4deea2 | 5750 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a KS |
5751 | Qnil, |
5752 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5753 | A value of 0 means no left fringe is shown in this buffer's window. | |
5754 | A value of nil means to use the left fringe width from the window's frame. */); | |
5755 | ||
4b4deea2 | 5756 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a KS |
5757 | Qnil, |
5758 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5759 | A value of 0 means no right fringe is shown in this buffer's window. | |
5760 | A value of nil means to use the right fringe width from the window's frame. */); | |
5761 | ||
4b4deea2 | 5762 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a KS |
5763 | Qnil, |
5764 | doc: /* *Non-nil means to display fringes outside display margins. | |
5765 | A value of nil means to display fringes between margins and buffer text. */); | |
5766 | ||
4b4deea2 | 5767 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a KS |
5768 | Qnil, |
5769 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5770 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5771 | ||
4b4deea2 | 5772 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a KS |
5773 | Qnil, |
5774 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5775 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5776 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5777 | |
fc2c8887 RS |
5778 | A value of `left' or `right' means put the vertical scroll bar at that side |
5779 | of the window; a value of nil means don't show any vertical scroll bars. | |
5780 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5781 | |
0552666b | 5782 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5783 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
efc7e75f | 5784 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5785 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5786 | window-systems. */); | |
177c0ea7 | 5787 | |
6b61353c | 5788 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5789 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
6b61353c KH |
5790 | doc: /* *Visually indicate buffer boundaries and scrolling. |
5791 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5792 | of a window on window-systems with angle bitmaps, or if the window can be | |
5793 | scrolled, the top and bottom line of the window are marked with up and down | |
5794 | arrow bitmaps. | |
b2229037 KS |
5795 | |
5796 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5797 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5798 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5799 | the left fringe but no arrows. |
b2229037 | 5800 | |
79e3497d RS |
5801 | You can exercise more precise control by using an alist as the |
5802 | value. Each alist element (INDICATOR . POSITION) specifies | |
5803 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5804 | `bottom', `up', `down', or t, which specifies the default position, |
5805 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5806 | this indicator. | |
5807 | ||
5808 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5809 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5810 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5811 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5812 | |
c6a46372 | 5813 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5814 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
c6a46372 KS |
5815 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. |
5816 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5817 | specifies the fringe bitmaps used to display a specific logical | |
5818 | fringe indicator. | |
5819 | ||
5820 | INDICATOR specifies the logical indicator type which is one of the | |
5821 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5822 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5823 | |
14fb5704 | 5824 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5825 | the actual bitmap shown in the left or right fringe for the logical |
5826 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5827 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5828 | are used only for the `bottom' and `top-bottom' indicators when the |
5829 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5830 | symbol which is used in both left and right fringes. */); |
5831 | ||
5832 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5833 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
c6a46372 KS |
5834 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. |
5835 | The value is an alist where each element (CURSOR . BITMAP) | |
5836 | specifies the fringe bitmaps used to display a specific logical | |
5837 | cursor type in the fringe. | |
5838 | ||
5839 | CURSOR specifies the logical cursor type which is one of the following | |
5840 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5841 | one is used to show a hollow cursor on narrow lines display lines | |
5842 | where the normal hollow cursor will not fit. | |
5843 | ||
5844 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5845 | cursor type. */); | |
5846 | ||
0552666b | 5847 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5848 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5849 | doc: /* How far to scroll windows upward. |
5850 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5851 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5852 | means scroll to center point. A fraction means scroll to put point |
5853 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5854 | When the value is 0.0, point goes at the bottom line, which in the |
5855 | simple case that you moved off with C-f means scrolling just one line. | |
5856 | 1.0 means point goes at the top, so that in that simple case, the | |
5857 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5858 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5859 | |
0552666b | 5860 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5861 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5862 | doc: /* How far to scroll windows downward. |
5863 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5864 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5865 | means scroll to center point. A fraction means scroll to put point |
5866 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5867 | When the value is 0.0, point goes at the top line, which in the |
5868 | simple case that you moved off with C-b means scrolling just one line. | |
5869 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5870 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5871 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5872 | |
1ab256cb RM |
5873 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5874 | "Don't ask."); | |
5875 | */ | |
1ab256cb | 5876 | |
29208e82 | 5877 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5878 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5879 | Two arguments are passed to each function: the positions of |
5880 | the beginning and end of the range of old text to be changed. | |
5881 | \(For an insertion, the beginning and end are at the same place.) | |
5882 | No information is given about the length of the text after the change. | |
5883 | ||
5884 | Buffer changes made while executing the `before-change-functions' | |
5885 | don't call any before-change or after-change functions. | |
7b2bf907 | 5886 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5887 | |
5888 | If an unhandled error happens in running these functions, | |
5889 | the variable's value remains nil. That prevents the error | |
5890 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5891 | Vbefore_change_functions = Qnil; |
5892 | ||
29208e82 | 5893 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5894 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5895 | Three arguments are passed to each function: the positions of |
5896 | the beginning and end of the range of changed text, | |
5897 | and the length in bytes of the pre-change text replaced by that range. | |
5898 | \(For an insertion, the pre-change length is zero; | |
5899 | for a deletion, that length is the number of bytes deleted, | |
5900 | and the post-change beginning and end are at the same place.) | |
5901 | ||
5902 | Buffer changes made while executing the `after-change-functions' | |
5903 | don't call any before-change or after-change functions. | |
7b2bf907 | 5904 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5905 | |
5906 | If an unhandled error happens in running these functions, | |
5907 | the variable's value remains nil. That prevents the error | |
5908 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5909 | Vafter_change_functions = Qnil; |
5910 | ||
29208e82 | 5911 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5912 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5913 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5914 | Vfirst_change_hook = Qnil; |
1ab256cb | 5915 | |
4b4deea2 | 5916 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5917 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5918 | Recent changes come first; older changes follow newer. |
5919 | ||
5920 | An entry (BEG . END) represents an insertion which begins at | |
5921 | position BEG and ends at position END. | |
5922 | ||
5923 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5924 | from (abs POSITION). If POSITION is positive, point was at the front | |
5925 | of the text being deleted; if negative, point was at the end. | |
5926 | ||
5927 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5928 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5929 | of the visited file's modification time, as of that time. If the | |
5930 | modification time of the most recent save is different, this entry is | |
5931 | obsolete. | |
5932 | ||
5933 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5934 | was modified between BEG and END. PROPERTY is the property name, | |
5935 | and VALUE is the old value. | |
5936 | ||
7405f386 KS |
5937 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5938 | \(apply FUN-NAME ARGS). | |
5939 | ||
5940 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5941 | in the active region. BEG and END is the range affected by this entry | |
5942 | and DELTA is the number of bytes added or deleted in that range by | |
5943 | this change. | |
c6c7dc03 | 5944 | |
018ba359 PJ |
5945 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5946 | was adjusted in position by the offset DISTANCE (an integer). | |
5947 | ||
5948 | An entry of the form POSITION indicates that point was at the buffer | |
5949 | location given by the integer. Undoing an entry of this form places | |
5950 | point at POSITION. | |
5951 | ||
b4c4f2f4 JB |
5952 | Entries with value `nil' mark undo boundaries. The undo command treats |
5953 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5954 | |
5955 | If the value of the variable is t, undo information is not recorded. */); | |
5956 | ||
4b4deea2 | 5957 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5958 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5959 | |
4b4deea2 | 5960 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5961 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5962 | |
5963 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5964 | newlines. Columnar operations (like `move-to-column' and |
5965 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5966 | widths as they go. This works well for ordinary text, but if the |
5967 | buffer's lines are very long (say, more than 500 characters), these | |
5968 | motion functions will take longer to execute. Emacs may also take | |
5969 | longer to update the display. | |
5970 | ||
5629f29b | 5971 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5972 | results of their scans, and consult the cache to avoid rescanning |
5973 | regions of the buffer until the text is modified. The caches are most | |
5974 | beneficial when they prevent the most searching---that is, when the | |
5975 | buffer contains long lines and large regions of characters with the | |
5976 | same, fixed screen width. | |
5977 | ||
5629f29b | 5978 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5979 | become slightly slower (because of the overhead of consulting the |
5980 | cache), and the caches will use memory roughly proportional to the | |
5981 | number of newlines and characters whose screen width varies. | |
5982 | ||
5983 | The caches require no explicit maintenance; their accuracy is | |
5984 | maintained internally by the Emacs primitives. Enabling or disabling | |
5985 | the cache should not affect the behavior of any of the motion | |
5986 | functions; it should only affect their performance. */); | |
5987 | ||
4b4deea2 | 5988 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5989 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5990 | |
4b4deea2 | 5991 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5992 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5993 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5994 | set when a file is visited. */); |
be9aafdd | 5995 | |
71ed49fa | 5996 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5997 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
71ed49fa LT |
5998 | doc: /* *Format in which to write auto-save files. |
5999 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6000 | If it is t, which is the default, auto-save files are written in the | |
6001 | same format as a regular save would use. */); | |
6002 | ||
3cb719bd | 6003 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6004 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6005 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6006 | The default is t, which means that text is invisible |
6007 | if it has a non-nil `invisible' property. | |
6008 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6009 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6010 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6011 | then characters with property value PROP are invisible, | |
6012 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6013 | |
7962a441 | 6014 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 6015 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 6016 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6017 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6018 | |
6019 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6020 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6021 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6022 | The function `set-window-buffer' updates this variable |
6023 | to the value obtained by calling `current-time'. | |
6024 | If the buffer has never been shown in a window, the value is nil. */); | |
6025 | ||
29208e82 | 6026 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6027 | doc: /* Non-nil if Transient Mark mode is enabled. |
6028 | See the command `transient-mark-mode' for a description of this minor mode. | |
6029 | ||
6030 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6031 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6032 | all windows or just the selected window. | |
6033 | ||
f49d1f52 | 6034 | Lisp programs may give this variable certain special values: |
9d794026 | 6035 | |
f49d1f52 SM |
6036 | - A value of `lambda' enables Transient Mark mode temporarily. |
6037 | It is disabled again after any subsequent action that would | |
6038 | normally deactivate the mark (e.g. buffer modification). | |
6039 | ||
6040 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6041 | temporarily. After any subsequent point motion command that is | |
6042 | not shift-translated, or any other action that would normally | |
6043 | deactivate the mark (e.g. buffer modification), the value of | |
6044 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6045 | Vtransient_mark_mode = Qnil; |
6046 | ||
29208e82 | 6047 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
7ee72033 | 6048 | doc: /* *Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6049 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6050 | text properties. If the value is a list, disregard `buffer-read-only' | |
6051 | and disregard a `read-only' text property if the property value | |
6052 | is a member of the list. */); | |
a96b68f1 RS |
6053 | Vinhibit_read_only = Qnil; |
6054 | ||
4b4deea2 | 6055 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6056 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6057 | Values are interpreted as follows: |
6058 | ||
b8dc613f JB |
6059 | t use the cursor specified for the frame |
6060 | nil don't display a cursor | |
6061 | box display a filled box cursor | |
6062 | hollow display a hollow box cursor | |
6063 | bar display a vertical bar cursor with default width | |
6064 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6065 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6066 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6067 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6068 | |
e08b1705 MR |
6069 | When the buffer is displayed in a non-selected window, the |
6070 | cursor's appearance is instead controlled by the variable | |
6071 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6072 | |
a3bbced0 | 6073 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6074 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6075 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6076 | The space is measured in pixels, and put below lines on graphic displays, |
6077 | see `display-graphic-p'. | |
60ebfdf3 | 6078 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6079 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6080 | |
0124c5bd | 6081 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6082 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
66c6abf0 GM |
6083 | doc: /* *Non-nil means show a cursor in non-selected windows. |
6084 | If nil, only shows a cursor in the selected window. | |
6085 | If t, displays a cursor related to the usual cursor type | |
6086 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6087 | You can also specify the cursor type as in the `cursor-type' variable. | |
6088 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6089 | |
29208e82 | 6090 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6091 | doc: /* List of functions called with no args to query before killing a buffer. |
6092 | The buffer being killed will be current while the functions are running. | |
6093 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6094 | Vkill_buffer_query_functions = Qnil; |
6095 | ||
29208e82 | 6096 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6097 | doc: /* Normal hook run before changing the major mode of a buffer. |
6098 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6099 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6100 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6101 | staticpro (&Qchange_major_mode_hook); |
6102 | ||
0dc88e60 | 6103 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6104 | defsubr (&Sbuffer_list); |
6105 | defsubr (&Sget_buffer); | |
6106 | defsubr (&Sget_file_buffer); | |
6107 | defsubr (&Sget_buffer_create); | |
336cd056 | 6108 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6109 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6110 | defsubr (&Sbuffer_name); |
6111 | /*defsubr (&Sbuffer_number);*/ | |
6112 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6113 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6114 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6115 | defsubr (&Sbuffer_local_variables); |
6116 | defsubr (&Sbuffer_modified_p); | |
6117 | defsubr (&Sset_buffer_modified_p); | |
6118 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6119 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6120 | defsubr (&Srename_buffer); |
6121 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6122 | defsubr (&Sbuffer_enable_undo); |
6123 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6124 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6125 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6126 | defsubr (&Scurrent_buffer); |
6127 | defsubr (&Sset_buffer); | |
6128 | defsubr (&Sbarf_if_buffer_read_only); | |
6129 | defsubr (&Sbury_buffer); | |
3ac81adb | 6130 | defsubr (&Serase_buffer); |
13cda5f9 | 6131 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6132 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6133 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6134 | |
52f8ec73 | 6135 | defsubr (&Soverlayp); |
2eec3b4e RS |
6136 | defsubr (&Smake_overlay); |
6137 | defsubr (&Sdelete_overlay); | |
6138 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6139 | defsubr (&Soverlay_start); |
6140 | defsubr (&Soverlay_end); | |
6141 | defsubr (&Soverlay_buffer); | |
6142 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6143 | defsubr (&Soverlays_at); |
74514898 | 6144 | defsubr (&Soverlays_in); |
2eec3b4e | 6145 | defsubr (&Snext_overlay_change); |
239c932b | 6146 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6147 | defsubr (&Soverlay_recenter); |
6148 | defsubr (&Soverlay_lists); | |
6149 | defsubr (&Soverlay_get); | |
6150 | defsubr (&Soverlay_put); | |
a8c21b48 | 6151 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6152 | } |
6153 | ||
dfcf069d | 6154 | void |
d3da34e0 | 6155 | keys_of_buffer (void) |
1ab256cb RM |
6156 | { |
6157 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6158 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6159 | |
6160 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6161 | initialized when that function gets called. */ | |
d67b4f80 | 6162 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6163 | } |