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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
96a72ee9 | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2012 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 | |
d6202519 PE |
30 | #include <verify.h> |
31 | ||
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
8f348ed5 | 36 | #include "character.h" |
e5560ff7 | 37 | #include "buffer.h" |
28e969dd | 38 | #include "region-cache.h" |
1ab256cb | 39 | #include "indent.h" |
d014bf88 | 40 | #include "blockinput.h" |
2538fae4 | 41 | #include "keyboard.h" |
e35f6ff7 | 42 | #include "keymap.h" |
08460cd4 | 43 | #include "frame.h" |
1ab256cb RM |
44 | |
45 | struct buffer *current_buffer; /* the current buffer */ | |
46 | ||
47 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 48 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
49 | |
50 | struct buffer *all_buffers; | |
51 | ||
52 | /* This structure holds the default values of the buffer-local variables | |
53 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
54 | The default value occupies the same slot in this structure | |
55 | as an individual buffer's value occupies in that buffer. | |
56 | Setting the default value also goes through the alist of buffers | |
57 | and stores into each buffer that does not say it has a local value. */ | |
58 | ||
e32a5799 | 59 | struct buffer alignas (GCALIGNMENT) buffer_defaults; |
1ab256cb RM |
60 | |
61 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
62 | ||
63 | static Lisp_Object Vbuffer_defaults; | |
64 | ||
65 | /* This structure marks which slots in a buffer have corresponding | |
66 | default values in buffer_defaults. | |
67 | Each such slot has a nonzero value in this structure. | |
68 | The value has only one nonzero bit. | |
69 | ||
70 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
71 | the entry for that slot (found in the same slot in this structure) |
72 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
73 | |
74 | If a slot in this structure is -1, then even though there may | |
75 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
76 | and the corresponding slot in buffer_defaults is not used. | |
77 | ||
1ab256cb RM |
78 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
79 | zero, that is a bug */ | |
80 | ||
81 | struct buffer buffer_local_flags; | |
82 | ||
83 | /* This structure holds the names of symbols whose values may be | |
84 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
85 | ||
e32a5799 | 86 | struct buffer alignas (GCALIGNMENT) buffer_local_symbols; |
6b61353c | 87 | |
1ab256cb RM |
88 | /* A Lisp_Object pointer to the above, used for staticpro */ |
89 | static Lisp_Object Vbuffer_local_symbols; | |
90 | ||
ce5b453a SM |
91 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
92 | the buffer structure. */ | |
93 | ||
94 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
95 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
96 | ||
21514da7 PE |
97 | /* Maximum length of an overlay vector. */ |
98 | #define OVERLAY_COUNT_MAX \ | |
99 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
100 | min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object))) | |
101 | ||
13de9290 RS |
102 | /* Flags indicating which built-in buffer-local variables |
103 | are permanent locals. */ | |
7313acd0 | 104 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
105 | |
106 | /* Number of per-buffer variables used. */ | |
107 | ||
7313acd0 | 108 | int last_per_buffer_idx; |
13de9290 | 109 | |
f57e2426 J |
110 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
111 | int after, Lisp_Object arg1, | |
112 | Lisp_Object arg2, Lisp_Object arg3); | |
113 | static void swap_out_buffer_local_variables (struct buffer *b); | |
114 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
115 | |
116 | /* Alist of all buffer names vs the buffers. */ | |
117 | /* This used to be a variable, but is no longer, | |
118 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
119 | Lisp_Object Vbuffer_alist; | |
120 | ||
955cbe7b | 121 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 122 | |
43ed3b8d | 123 | /* Hook run before changing a major mode. */ |
955cbe7b | 124 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 125 | |
dbc4e1c1 | 126 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
127 | Lisp_Object Qbefore_change_functions; |
128 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 129 | |
955cbe7b PE |
130 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
131 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 132 | |
955cbe7b | 133 | static Lisp_Object Qprotected_field; |
1ab256cb | 134 | |
955cbe7b | 135 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 136 | |
955cbe7b | 137 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 138 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 139 | |
955cbe7b | 140 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 141 | |
955cbe7b | 142 | static Lisp_Object Qoverlayp; |
52f8ec73 | 143 | |
955cbe7b | 144 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 145 | |
28545e04 | 146 | static Lisp_Object Qevaporate; |
5985d248 | 147 | |
294d215f RS |
148 | Lisp_Object Qmodification_hooks; |
149 | Lisp_Object Qinsert_in_front_hooks; | |
150 | Lisp_Object Qinsert_behind_hooks; | |
151 | ||
fd05c7e9 | 152 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
153 | static void free_buffer_text (struct buffer *b); |
154 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 155 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
8a05d57a | 156 | static Lisp_Object buffer_lisp_local_variables (struct buffer *, int); |
b86af064 | 157 | |
1ab256cb RM |
158 | /* For debugging; temporary. See set_buffer_internal. */ |
159 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
160 | ||
01136e9b | 161 | void |
d3da34e0 | 162 | nsberror (Lisp_Object spec) |
1ab256cb | 163 | { |
a7a60ce9 | 164 | if (STRINGP (spec)) |
d5db4077 | 165 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
166 | error ("Invalid buffer argument"); |
167 | } | |
168 | \f | |
a7ca3326 | 169 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
170 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
171 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 172 | (Lisp_Object object) |
0dc88e60 | 173 | { |
4b4deea2 | 174 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
175 | ? Qt : Qnil); |
176 | } | |
177 | ||
08460cd4 | 178 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 179 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
180 | If the optional arg FRAME is a frame, we return the buffer list in the |
181 | proper order for that frame: the buffers show in FRAME come first, | |
182 | followed by the rest of the buffers. */) | |
5842a27b | 183 | (Lisp_Object frame) |
1ab256cb | 184 | { |
a18b8cb5 | 185 | Lisp_Object general; |
08460cd4 RS |
186 | general = Fmapcar (Qcdr, Vbuffer_alist); |
187 | ||
188 | if (FRAMEP (frame)) | |
189 | { | |
a18b8cb5 KL |
190 | Lisp_Object framelist, prevlist, tail; |
191 | Lisp_Object args[3]; | |
08460cd4 | 192 | |
b7826503 | 193 | CHECK_FRAME (frame); |
e34f7f79 | 194 | framelist = Fcopy_sequence (FVAR (XFRAME (frame), buffer_list)); |
9397e56f | 195 | prevlist = Fnreverse (Fcopy_sequence |
e34f7f79 | 196 | (FVAR (XFRAME (frame), buried_buffer_list))); |
08460cd4 | 197 | |
a18b8cb5 KL |
198 | /* Remove from GENERAL any buffer that duplicates one in |
199 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 200 | tail = framelist; |
a18b8cb5 | 201 | while (CONSP (tail)) |
08460cd4 | 202 | { |
7539e11f KR |
203 | general = Fdelq (XCAR (tail), general); |
204 | tail = XCDR (tail); | |
08460cd4 | 205 | } |
a18b8cb5 KL |
206 | tail = prevlist; |
207 | while (CONSP (tail)) | |
208 | { | |
209 | general = Fdelq (XCAR (tail), general); | |
210 | tail = XCDR (tail); | |
211 | } | |
212 | ||
213 | args[0] = framelist; | |
214 | args[1] = general; | |
215 | args[2] = prevlist; | |
216 | return Fnconc (3, args); | |
08460cd4 | 217 | } |
9397e56f MR |
218 | else |
219 | return general; | |
1ab256cb RM |
220 | } |
221 | ||
04ae1b48 RS |
222 | /* Like Fassoc, but use Fstring_equal to compare |
223 | (which ignores text properties), | |
224 | and don't ever QUIT. */ | |
225 | ||
226 | static Lisp_Object | |
d3da34e0 | 227 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
228 | { |
229 | register Lisp_Object tail; | |
6d70a280 | 230 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
231 | { |
232 | register Lisp_Object elt, tem; | |
6d70a280 | 233 | elt = XCAR (tail); |
04ae1b48 RS |
234 | tem = Fstring_equal (Fcar (elt), key); |
235 | if (!NILP (tem)) | |
236 | return elt; | |
237 | } | |
238 | return Qnil; | |
239 | } | |
240 | ||
a7ca3326 | 241 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
242 | doc: /* Return the buffer named BUFFER-OR-NAME. |
243 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
244 | is a string and there is no buffer with that name, return nil. If | |
245 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 246 | (register Lisp_Object buffer_or_name) |
1ab256cb | 247 | { |
c8804c4f MR |
248 | if (BUFFERP (buffer_or_name)) |
249 | return buffer_or_name; | |
250 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 251 | |
c8804c4f | 252 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
253 | } |
254 | ||
255 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 256 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
257 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
258 | If there is no such live buffer, return nil. | |
7ee72033 | 259 | See also `find-buffer-visiting'. */) |
5842a27b | 260 | (register Lisp_Object filename) |
1ab256cb RM |
261 | { |
262 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
263 | Lisp_Object handler; |
264 | ||
b7826503 | 265 | CHECK_STRING (filename); |
1ab256cb RM |
266 | filename = Fexpand_file_name (filename, Qnil); |
267 | ||
5fe0b67e RS |
268 | /* If the file name has special constructs in it, |
269 | call the corresponding file handler. */ | |
a617e913 | 270 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 271 | if (!NILP (handler)) |
a59225b1 CY |
272 | { |
273 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
274 | filename); | |
275 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
276 | } | |
5fe0b67e | 277 | |
7539e11f | 278 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 279 | { |
7539e11f | 280 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 281 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
282 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
283 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 284 | if (!NILP (tem)) |
1ab256cb RM |
285 | return buf; |
286 | } | |
287 | return Qnil; | |
288 | } | |
289 | ||
52e01189 | 290 | Lisp_Object |
d3da34e0 | 291 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
292 | { |
293 | register Lisp_Object tail, buf, tem; | |
294 | ||
7539e11f | 295 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 296 | { |
7539e11f | 297 | buf = Fcdr (XCAR (tail)); |
52e01189 | 298 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
299 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
300 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
301 | if (!NILP (tem)) |
302 | return buf; | |
303 | } | |
304 | return Qnil; | |
305 | } | |
306 | ||
a7ca3326 | 307 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
308 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
309 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
310 | return that buffer. If no such buffer exists, create a new buffer with | |
311 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
312 | buffer does not keep undo information. | |
313 | ||
314 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
315 | even if it is dead. The return value is never nil. */) | |
5842a27b | 316 | (register Lisp_Object buffer_or_name) |
1ab256cb | 317 | { |
cd265ca6 | 318 | register Lisp_Object buffer, name; |
1ab256cb RM |
319 | register struct buffer *b; |
320 | ||
cd265ca6 MR |
321 | buffer = Fget_buffer (buffer_or_name); |
322 | if (!NILP (buffer)) | |
323 | return buffer; | |
1ab256cb | 324 | |
cd265ca6 | 325 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
326 | error ("Empty string for buffer name is not allowed"); |
327 | ||
cc648cef | 328 | b = allocate_buffer (); |
1ab256cb | 329 | |
336cd056 RS |
330 | /* An ordinary buffer uses its own struct buffer_text. */ |
331 | b->text = &b->own_text; | |
9928463d DA |
332 | b->base_buffer = NULL; |
333 | /* No one shares the text with us now. */ | |
334 | b->indirections = 0; | |
336cd056 | 335 | |
1ab256cb | 336 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 337 | BLOCK_INPUT; |
3b06f880 KH |
338 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
339 | anchoring a search. */ | |
b86af064 | 340 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 341 | UNBLOCK_INPUT; |
1ab256cb | 342 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 343 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 344 | |
cffc6f3b CY |
345 | b->pt = BEG; |
346 | b->begv = BEG; | |
347 | b->zv = BEG; | |
348 | b->pt_byte = BEG_BYTE; | |
349 | b->begv_byte = BEG_BYTE; | |
350 | b->zv_byte = BEG_BYTE; | |
351 | ||
6d70a280 | 352 | BUF_GPT (b) = BEG; |
6d70a280 | 353 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
354 | |
355 | BUF_Z (b) = BEG; | |
6d70a280 | 356 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 357 | BUF_MODIFF (b) = 1; |
3e145152 | 358 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 359 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
360 | BUF_SAVE_MODIFF (b) = 1; |
361 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
362 | BUF_UNCHANGED_MODIFIED (b) = 1; |
363 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
364 | BUF_END_UNCHANGED (b) = 0; | |
365 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 366 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 367 | b->text->inhibit_shrinking = 0; |
1ab256cb | 368 | |
28e969dd JB |
369 | b->newline_cache = 0; |
370 | b->width_run_cache = 0; | |
4b4deea2 | 371 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 372 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 373 | |
1ab256cb | 374 | /* Put this on the chain of all buffers including killed ones. */ |
eab3844f | 375 | b->header.next.buffer = all_buffers; |
1ab256cb RM |
376 | all_buffers = b; |
377 | ||
336cd056 RS |
378 | /* An ordinary buffer normally doesn't need markers |
379 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
380 | BVAR (b, pt_marker) = Qnil; |
381 | BVAR (b, begv_marker) = Qnil; | |
382 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 383 | |
cd265ca6 | 384 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 385 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 386 | BVAR (b, name) = name; |
04ae1b48 | 387 | |
4b4deea2 | 388 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
389 | |
390 | reset_buffer (b); | |
13de9290 | 391 | reset_buffer_local_variables (b, 1); |
1ab256cb | 392 | |
4b4deea2 | 393 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 394 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 395 | |
1ab256cb | 396 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
397 | XSETBUFFER (buffer, b); |
398 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
399 | /* And run buffer-list-update-hook. */ |
400 | if (!NILP (Vrun_hooks)) | |
401 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 402 | |
cd265ca6 | 403 | return buffer; |
336cd056 RS |
404 | } |
405 | ||
7e9d5818 | 406 | |
04e4cb3a GM |
407 | /* Return a list of overlays which is a copy of the overlay list |
408 | LIST, but for buffer B. */ | |
409 | ||
2410d73a | 410 | static struct Lisp_Overlay * |
d3da34e0 | 411 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 412 | { |
2410d73a | 413 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 414 | |
2410d73a | 415 | for (; list; list = list->next) |
04e4cb3a | 416 | { |
fa691a83 DA |
417 | Lisp_Object overlay, start, end; |
418 | struct Lisp_Marker *m; | |
04e4cb3a | 419 | |
d8a05828 DA |
420 | eassert (MARKERP (MVAR (list, start))); |
421 | m = XMARKER (MVAR (list, start)); | |
fa691a83 DA |
422 | start = build_marker (b, m->charpos, m->bytepos); |
423 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 424 | |
d8a05828 DA |
425 | eassert (MARKERP (MVAR (list, end))); |
426 | m = XMARKER (MVAR (list, end)); | |
fa691a83 DA |
427 | end = build_marker (b, m->charpos, m->bytepos); |
428 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 429 | |
d8a05828 | 430 | overlay = build_overlay (start, end, Fcopy_sequence (MVAR (list, plist))); |
2410d73a SM |
431 | if (tail) |
432 | tail = tail->next = XOVERLAY (overlay); | |
433 | else | |
434 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
435 | } |
436 | ||
2410d73a | 437 | return result; |
04e4cb3a | 438 | } |
177c0ea7 | 439 | |
04e4cb3a | 440 | |
7e9d5818 GM |
441 | /* Clone per-buffer values of buffer FROM. |
442 | ||
443 | Buffer TO gets the same per-buffer values as FROM, with the | |
444 | following exceptions: (1) TO's name is left untouched, (2) markers | |
445 | are copied and made to refer to TO, and (3) overlay lists are | |
446 | copied. */ | |
447 | ||
448 | static void | |
d3da34e0 | 449 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 450 | { |
7e9d5818 GM |
451 | int offset; |
452 | ||
52b852c7 | 453 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
454 | { |
455 | Lisp_Object obj; | |
456 | ||
4b7cdc0e SM |
457 | /* Don't touch the `name' which should be unique for every buffer. */ |
458 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
459 | continue; | |
460 | ||
7e9d5818 | 461 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 462 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
463 | { |
464 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
465 | |
466 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 467 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
468 | } |
469 | ||
470 | PER_BUFFER_VALUE (to, offset) = obj; | |
471 | } | |
472 | ||
72af86bd | 473 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 474 | |
04e4cb3a GM |
475 | to->overlays_before = copy_overlays (to, from->overlays_before); |
476 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 477 | |
e1688f54 RS |
478 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
479 | and install that in TO. */ | |
8a05d57a | 480 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from, 1); |
7e9d5818 GM |
481 | } |
482 | ||
cffc6f3b CY |
483 | |
484 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
485 | current, update these markers. */ | |
486 | ||
487 | static void | |
488 | record_buffer_markers (struct buffer *b) | |
489 | { | |
490 | if (! NILP (BVAR (b, pt_marker))) | |
491 | { | |
492 | Lisp_Object buffer; | |
493 | ||
494 | eassert (!NILP (BVAR (b, begv_marker))); | |
495 | eassert (!NILP (BVAR (b, zv_marker))); | |
496 | ||
497 | XSETBUFFER (buffer, b); | |
498 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
499 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
500 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
501 | } | |
502 | } | |
503 | ||
504 | ||
505 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
506 | current, fetch these values into B->begv etc. */ | |
507 | ||
508 | static void | |
509 | fetch_buffer_markers (struct buffer *b) | |
510 | { | |
511 | if (! NILP (BVAR (b, pt_marker))) | |
512 | { | |
513 | Lisp_Object m; | |
514 | ||
515 | eassert (!NILP (BVAR (b, begv_marker))); | |
516 | eassert (!NILP (BVAR (b, zv_marker))); | |
517 | ||
518 | m = BVAR (b, pt_marker); | |
519 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
520 | ||
521 | m = BVAR (b, begv_marker); | |
522 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
523 | ||
524 | m = BVAR (b, zv_marker); | |
525 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
526 | } | |
527 | } | |
528 | ||
529 | ||
7e9d5818 GM |
530 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
531 | 2, 3, | |
193c3837 | 532 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 533 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 534 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
535 | NAME should be a string which is not the name of an existing buffer. |
536 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
537 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 538 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 539 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 540 | { |
6b61353c | 541 | Lisp_Object buf, tem; |
7e9d5818 | 542 | struct buffer *b; |
336cd056 | 543 | |
6b61353c | 544 | CHECK_STRING (name); |
336cd056 RS |
545 | buf = Fget_buffer (name); |
546 | if (!NILP (buf)) | |
d5db4077 | 547 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 548 | |
6b61353c | 549 | tem = base_buffer; |
336cd056 RS |
550 | base_buffer = Fget_buffer (base_buffer); |
551 | if (NILP (base_buffer)) | |
6b61353c | 552 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 553 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 554 | error ("Base buffer has been killed"); |
336cd056 | 555 | |
d5db4077 | 556 | if (SCHARS (name) == 0) |
336cd056 RS |
557 | error ("Empty string for buffer name is not allowed"); |
558 | ||
cc648cef | 559 | b = allocate_buffer (); |
336cd056 | 560 | |
9928463d DA |
561 | /* No double indirection - if base buffer is indirect, |
562 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
563 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
564 | ? XBUFFER (base_buffer)->base_buffer | |
565 | : XBUFFER (base_buffer)); | |
336cd056 RS |
566 | |
567 | /* Use the base buffer's text object. */ | |
568 | b->text = b->base_buffer->text; | |
9928463d DA |
569 | /* We have no own text. */ |
570 | b->indirections = -1; | |
571 | /* Notify base buffer that we share the text now. */ | |
572 | b->base_buffer->indirections++; | |
336cd056 | 573 | |
cffc6f3b CY |
574 | b->pt = b->base_buffer->pt; |
575 | b->begv = b->base_buffer->begv; | |
576 | b->zv = b->base_buffer->zv; | |
577 | b->pt_byte = b->base_buffer->pt_byte; | |
578 | b->begv_byte = b->base_buffer->begv_byte; | |
579 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
580 | |
581 | b->newline_cache = 0; | |
582 | b->width_run_cache = 0; | |
4b4deea2 | 583 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
584 | |
585 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 586 | b->header.next.buffer = all_buffers; |
336cd056 RS |
587 | all_buffers = b; |
588 | ||
589 | name = Fcopy_sequence (name); | |
ab77f05c | 590 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 591 | BVAR (b, name) = name; |
336cd056 RS |
592 | |
593 | reset_buffer (b); | |
13de9290 | 594 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
595 | |
596 | /* Put this in the alist of all live buffers. */ | |
597 | XSETBUFFER (buf, b); | |
598 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
599 | ||
4b4deea2 | 600 | BVAR (b, mark) = Fmake_marker (); |
336cd056 | 601 | |
abc9d959 | 602 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 603 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 604 | |
336cd056 | 605 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 606 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 607 | { |
2aa46d6c CY |
608 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
609 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 610 | |
52b852c7 | 611 | BVAR (b->base_buffer, pt_marker) |
657924ff DA |
612 | = build_marker (b->base_buffer, b->base_buffer->pt, b->base_buffer->pt_byte); |
613 | ||
614 | BVAR (b->base_buffer, begv_marker) | |
615 | = build_marker (b->base_buffer, b->base_buffer->begv, b->base_buffer->begv_byte); | |
cffc6f3b | 616 | |
657924ff DA |
617 | BVAR (b->base_buffer, zv_marker) |
618 | = build_marker (b->base_buffer, b->base_buffer->zv, b->base_buffer->zv_byte); | |
cffc6f3b | 619 | |
4b4deea2 | 620 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
621 | } |
622 | ||
7e9d5818 GM |
623 | if (NILP (clone)) |
624 | { | |
625 | /* Give the indirect buffer markers for its narrowing. */ | |
657924ff DA |
626 | BVAR (b, pt_marker) = build_marker (b, b->pt, b->pt_byte); |
627 | BVAR (b, begv_marker) = build_marker (b, b->begv, b->begv_byte); | |
628 | BVAR (b, zv_marker) = build_marker (b, b->zv, b->zv_byte); | |
4b4deea2 | 629 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
630 | } |
631 | else | |
7fa57e45 RS |
632 | { |
633 | struct buffer *old_b = current_buffer; | |
634 | ||
635 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
636 | BVAR (b, filename) = Qnil; |
637 | BVAR (b, file_truename) = Qnil; | |
638 | BVAR (b, display_count) = make_number (0); | |
639 | BVAR (b, backed_up) = Qnil; | |
640 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
641 | set_buffer_internal_1 (b); |
642 | Fset (intern ("buffer-save-without-query"), Qnil); | |
643 | Fset (intern ("buffer-file-number"), Qnil); | |
644 | Fset (intern ("buffer-stale-function"), Qnil); | |
645 | set_buffer_internal_1 (old_b); | |
646 | } | |
336cd056 | 647 | |
9397e56f MR |
648 | /* Run buffer-list-update-hook. */ |
649 | if (!NILP (Vrun_hooks)) | |
650 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
651 | ||
a9ee7a59 | 652 | return buf; |
1ab256cb RM |
653 | } |
654 | ||
041a49a6 DA |
655 | /* Mark OV as no longer associated with B. */ |
656 | ||
657 | static void | |
658 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
659 | { | |
d8a05828 DA |
660 | eassert (b == XBUFFER (Fmarker_buffer (MVAR (ov, start)))); |
661 | modify_overlay (b, marker_position (MVAR (ov, start)), | |
662 | marker_position (MVAR (ov, end))); | |
663 | Fset_marker (MVAR (ov, start), Qnil, Qnil); | |
664 | Fset_marker (MVAR (ov, end), Qnil, Qnil); | |
041a49a6 DA |
665 | |
666 | } | |
667 | ||
668 | /* Delete all overlays of B and reset it's overlay lists. */ | |
669 | ||
d4f5719a | 670 | void |
d3da34e0 | 671 | delete_all_overlays (struct buffer *b) |
d4f5719a | 672 | { |
041a49a6 | 673 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 674 | |
041a49a6 | 675 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 676 | { |
041a49a6 DA |
677 | drop_overlay (b, ov); |
678 | next = ov->next; | |
679 | ov->next = NULL; | |
d4f5719a | 680 | } |
041a49a6 DA |
681 | |
682 | for (ov = b->overlays_after; ov; ov = next) | |
d4f5719a | 683 | { |
041a49a6 DA |
684 | drop_overlay (b, ov); |
685 | next = ov->next; | |
686 | ov->next = NULL; | |
d4f5719a | 687 | } |
041a49a6 DA |
688 | |
689 | b->overlays_before = b->overlays_after = NULL; | |
d4f5719a SM |
690 | } |
691 | ||
bcd40520 | 692 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 693 | and local variables. |
d4f5719a SM |
694 | If called on an already-initialized buffer, the list of overlays |
695 | should be deleted before calling this function, otherwise we end up | |
696 | with overlays that claim to belong to the buffer but the buffer | |
697 | claims it doesn't belong to it. */ | |
1ab256cb RM |
698 | |
699 | void | |
d3da34e0 | 700 | reset_buffer (register struct buffer *b) |
1ab256cb | 701 | { |
4b4deea2 TT |
702 | BVAR (b, filename) = Qnil; |
703 | BVAR (b, file_truename) = Qnil; | |
704 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
e9a9ae03 | 705 | b->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 706 | b->modtime_size = -1; |
4b4deea2 | 707 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 708 | b->last_window_start = 1; |
8b264726 | 709 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
710 | b->clip_changed = 0; |
711 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 712 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 713 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 714 | b->auto_save_failure_time = 0; |
4b4deea2 TT |
715 | BVAR (b, auto_save_file_name) = Qnil; |
716 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
717 | b->overlays_before = NULL; |
718 | b->overlays_after = NULL; | |
c2d5b10f | 719 | b->overlay_center = BEG; |
4b4deea2 TT |
720 | BVAR (b, mark_active) = Qnil; |
721 | BVAR (b, point_before_scroll) = Qnil; | |
722 | BVAR (b, file_format) = Qnil; | |
723 | BVAR (b, auto_save_file_format) = Qt; | |
724 | BVAR (b, last_selected_window) = Qnil; | |
725 | XSETINT (BVAR (b, display_count), 0); | |
726 | BVAR (b, display_time) = Qnil; | |
727 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
728 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
729 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
730 | |
731 | b->display_error_modiff = 0; | |
1ab256cb RM |
732 | } |
733 | ||
bcd40520 RS |
734 | /* Reset buffer B's local variables info. |
735 | Don't use this on a buffer that has already been in use; | |
736 | it does not treat permanent locals consistently. | |
13de9290 RS |
737 | Instead, use Fkill_all_local_variables. |
738 | ||
3709505e | 739 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
740 | buffer-local variables. If PERMANENT_TOO is 0, |
741 | we preserve those. */ | |
bcd40520 | 742 | |
13de9290 | 743 | static void |
d3da34e0 | 744 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
745 | { |
746 | register int offset; | |
7c02e886 | 747 | int i; |
1ab256cb RM |
748 | |
749 | /* Reset the major mode to Fundamental, together with all the | |
750 | things that depend on the major mode. | |
751 | default-major-mode is handled at a higher level. | |
752 | We ignore it here. */ | |
4b4deea2 TT |
753 | BVAR (b, major_mode) = Qfundamental_mode; |
754 | BVAR (b, keymap) = Qnil; | |
755 | BVAR (b, mode_name) = QSFundamental; | |
756 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
757 | |
758 | /* If the standard case table has been altered and invalidated, | |
759 | fix up its insides first. */ | |
760 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
761 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
762 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
763 | Fset_standard_case_table (Vascii_downcase_table); | |
764 | ||
4b4deea2 TT |
765 | BVAR (b, downcase_table) = Vascii_downcase_table; |
766 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
767 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
768 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
769 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 770 | |
13de9290 | 771 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 772 | if (permanent_too) |
4b4deea2 | 773 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
774 | else |
775 | { | |
2f7a359d | 776 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 777 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 778 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
779 | { |
780 | /* If permanent-local, keep it. */ | |
781 | last = tmp; | |
782 | if (EQ (prop, Qpermanent_local_hook)) | |
783 | { | |
784 | /* This is a partially permanent hook variable. | |
785 | Preserve only the elements that want to be preserved. */ | |
786 | Lisp_Object list, newlist; | |
787 | list = XCDR (XCAR (tmp)); | |
788 | if (!CONSP (list)) | |
789 | newlist = list; | |
790 | else | |
791 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
792 | { | |
793 | Lisp_Object elt = XCAR (list); | |
794 | /* Preserve element ELT if it's t, | |
795 | if it is a function with a `permanent-local-hook' property, | |
796 | or if it's not a symbol. */ | |
797 | if (! SYMBOLP (elt) | |
798 | || EQ (elt, Qt) | |
799 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
800 | newlist = Fcons (elt, newlist); | |
801 | } | |
802 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
803 | } | |
804 | } | |
805 | /* Delete this local variable. */ | |
3709505e | 806 | else if (NILP (last)) |
4b4deea2 | 807 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
808 | else |
809 | XSETCDR (last, XCDR (tmp)); | |
810 | } | |
811 | ||
7313acd0 | 812 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 813 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 814 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 815 | |
36429c89 | 816 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 817 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 818 | { |
7313acd0 | 819 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
820 | if ((idx > 0 |
821 | && (permanent_too | |
ce5b453a | 822 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 823 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 824 | } |
1ab256cb RM |
825 | } |
826 | ||
01050cb5 RM |
827 | /* We split this away from generate-new-buffer, because rename-buffer |
828 | and set-visited-file-name ought to be able to use this to really | |
829 | rename the buffer properly. */ | |
830 | ||
a7ca3326 | 831 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 832 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 833 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
834 | If there is no live buffer named NAME, then return NAME. |
835 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 836 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 837 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
838 | it is in the sequence to be tried) even if a buffer with that name exists. |
839 | ||
840 | If NAME begins with a space (i.e., a buffer that is not normally | |
841 | visible to users), then if buffer NAME already exists a random number | |
842 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 843 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 844 | { |
8e4fd1e1 | 845 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
846 | ptrdiff_t count; |
847 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 848 | |
b7826503 | 849 | CHECK_STRING (name); |
1ab256cb | 850 | |
6b61353c KH |
851 | tem = Fstring_equal (name, ignore); |
852 | if (!NILP (tem)) | |
853 | return name; | |
1ab256cb | 854 | tem = Fget_buffer (name); |
265a9e55 | 855 | if (NILP (tem)) |
01050cb5 | 856 | return name; |
1ab256cb | 857 | |
8e4fd1e1 GM |
858 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
859 | { | |
860 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 861 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 862 | (number, "-%"pI"d", |
a8290ec3 | 863 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
864 | tem = Fget_buffer (tem2); |
865 | if (NILP (tem)) | |
866 | return tem2; | |
867 | } | |
868 | else | |
869 | tem2 = name; | |
870 | ||
1ab256cb RM |
871 | count = 1; |
872 | while (1) | |
873 | { | |
a8290ec3 DA |
874 | gentemp = concat2 (tem2, make_formatted_string |
875 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 876 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
877 | if (!NILP (tem)) |
878 | return gentemp; | |
1ab256cb | 879 | tem = Fget_buffer (gentemp); |
265a9e55 | 880 | if (NILP (tem)) |
01050cb5 | 881 | return gentemp; |
1ab256cb RM |
882 | } |
883 | } | |
884 | ||
885 | \f | |
a7ca3326 | 886 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 887 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
888 | BUFFER defaults to the current buffer. |
889 | Return nil if BUFFER has been killed. */) | |
5842a27b | 890 | (register Lisp_Object buffer) |
1ab256cb | 891 | { |
265a9e55 | 892 | if (NILP (buffer)) |
4b4deea2 | 893 | return BVAR (current_buffer, name); |
b7826503 | 894 | CHECK_BUFFER (buffer); |
4b4deea2 | 895 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
896 | } |
897 | ||
a7ca3326 | 898 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
899 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
900 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 901 | (register Lisp_Object buffer) |
1ab256cb | 902 | { |
265a9e55 | 903 | if (NILP (buffer)) |
4b4deea2 | 904 | return BVAR (current_buffer, filename); |
b7826503 | 905 | CHECK_BUFFER (buffer); |
4b4deea2 | 906 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
907 | } |
908 | ||
336cd056 RS |
909 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
910 | 0, 1, 0, | |
7ee72033 | 911 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
912 | If BUFFER is not indirect, return nil. |
913 | BUFFER defaults to the current buffer. */) | |
5842a27b | 914 | (register Lisp_Object buffer) |
336cd056 RS |
915 | { |
916 | struct buffer *base; | |
917 | Lisp_Object base_buffer; | |
918 | ||
919 | if (NILP (buffer)) | |
920 | base = current_buffer->base_buffer; | |
921 | else | |
922 | { | |
b7826503 | 923 | CHECK_BUFFER (buffer); |
336cd056 RS |
924 | base = XBUFFER (buffer)->base_buffer; |
925 | } | |
926 | ||
927 | if (! base) | |
928 | return Qnil; | |
929 | XSETBUFFER (base_buffer, base); | |
930 | return base_buffer; | |
931 | } | |
932 | ||
a7ca3326 | 933 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 934 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
935 | doc: /* Return the value of VARIABLE in BUFFER. |
936 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 937 | is the default binding of the variable. */) |
5842a27b | 938 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
939 | { |
940 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
941 | ||
942 | if (EQ (result, Qunbound)) | |
943 | xsignal1 (Qvoid_variable, variable); | |
944 | ||
945 | return result; | |
946 | } | |
947 | ||
948 | ||
949 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
950 | locally unbound. */ | |
951 | ||
952 | Lisp_Object | |
953 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
954 | { |
955 | register struct buffer *buf; | |
956 | register Lisp_Object result; | |
ad97b375 | 957 | struct Lisp_Symbol *sym; |
79aa712d | 958 | |
5e2ad10b | 959 | CHECK_SYMBOL (variable); |
ae69175b | 960 | CHECK_BUFFER (buffer); |
79aa712d | 961 | buf = XBUFFER (buffer); |
ce5b453a | 962 | sym = XSYMBOL (variable); |
79aa712d | 963 | |
ce5b453a SM |
964 | start: |
965 | switch (sym->redirect) | |
f0bac7de | 966 | { |
ce5b453a SM |
967 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
968 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
969 | case SYMBOL_LOCALIZED: | |
970 | { /* Look in local_var_alist. */ | |
971 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
972 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 973 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
974 | if (!NILP (result)) |
975 | { | |
976 | if (blv->fwd) | |
977 | { /* What binding is loaded right now? */ | |
978 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 979 | |
ce5b453a SM |
980 | /* The value of the currently loaded binding is not |
981 | stored in it, but rather in the realvalue slot. | |
982 | Store that value into the binding it belongs to | |
983 | in case that is the one we are about to use. */ | |
f0bac7de | 984 | |
ce5b453a SM |
985 | XSETCDR (current_alist_element, |
986 | do_symval_forwarding (blv->fwd)); | |
987 | } | |
988 | /* Now get the (perhaps updated) value out of the binding. */ | |
989 | result = XCDR (result); | |
990 | } | |
991 | else | |
992 | result = Fdefault_value (variable); | |
993 | break; | |
994 | } | |
995 | case SYMBOL_FORWARDED: | |
996 | { | |
997 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
998 | if (BUFFER_OBJFWDP (fwd)) | |
999 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
1000 | else | |
1001 | result = Fdefault_value (variable); | |
1002 | break; | |
1003 | } | |
1004 | default: abort (); | |
f0bac7de | 1005 | } |
79aa712d | 1006 | |
5f2c76c6 | 1007 | return result; |
79aa712d RS |
1008 | } |
1009 | ||
e1688f54 | 1010 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1011 | buffer BUF. That is, don't include the variables maintained |
8a05d57a AS |
1012 | in special slots in the buffer object. |
1013 | If CLONE is zero elements of the form (VAR . unbound) are replaced | |
1014 | by VAR. */ | |
e1688f54 RS |
1015 | |
1016 | static Lisp_Object | |
8a05d57a | 1017 | buffer_lisp_local_variables (struct buffer *buf, int clone) |
e1688f54 RS |
1018 | { |
1019 | Lisp_Object result = Qnil; | |
1020 | register Lisp_Object tail; | |
4b4deea2 | 1021 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1022 | { |
1023 | Lisp_Object val, elt; | |
1024 | ||
1025 | elt = XCAR (tail); | |
1026 | ||
1027 | /* Reference each variable in the alist in buf. | |
1028 | If inquiring about the current buffer, this gets the current values, | |
1029 | so store them into the alist so the alist is up to date. | |
1030 | If inquiring about some other buffer, this swaps out any values | |
1031 | for that buffer, making the alist up to date automatically. */ | |
1032 | val = find_symbol_value (XCAR (elt)); | |
1033 | /* Use the current buffer value only if buf is the current buffer. */ | |
1034 | if (buf != current_buffer) | |
1035 | val = XCDR (elt); | |
1036 | ||
8a05d57a | 1037 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1038 | ? XCAR (elt) |
1039 | : Fcons (XCAR (elt), val), | |
1040 | result); | |
e1688f54 RS |
1041 | } |
1042 | ||
1043 | return result; | |
1044 | } | |
1045 | ||
1ab256cb | 1046 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1047 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1048 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1049 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1050 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1051 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1052 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1053 | (register Lisp_Object buffer) |
1ab256cb RM |
1054 | { |
1055 | register struct buffer *buf; | |
553defa4 | 1056 | register Lisp_Object result; |
1ab256cb | 1057 | |
265a9e55 | 1058 | if (NILP (buffer)) |
1ab256cb RM |
1059 | buf = current_buffer; |
1060 | else | |
1061 | { | |
b7826503 | 1062 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1063 | buf = XBUFFER (buffer); |
1064 | } | |
1065 | ||
8a05d57a | 1066 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1067 | |
1ab256cb RM |
1068 | /* Add on all the variables stored in special slots. */ |
1069 | { | |
7c02e886 | 1070 | int offset, idx; |
1ab256cb | 1071 | |
52b852c7 | 1072 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1073 | { |
7313acd0 GM |
1074 | idx = PER_BUFFER_IDX (offset); |
1075 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1076 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1077 | { |
1078 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1079 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1080 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1081 | result); | |
1082 | } | |
1ab256cb RM |
1083 | } |
1084 | } | |
553defa4 RS |
1085 | |
1086 | return result; | |
1ab256cb | 1087 | } |
1ab256cb | 1088 | \f |
a7ca3326 | 1089 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1090 | 0, 1, 0, |
7ee72033 MB |
1091 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1092 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1093 | (register Lisp_Object buffer) |
1ab256cb RM |
1094 | { |
1095 | register struct buffer *buf; | |
265a9e55 | 1096 | if (NILP (buffer)) |
1ab256cb RM |
1097 | buf = current_buffer; |
1098 | else | |
1099 | { | |
b7826503 | 1100 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1101 | buf = XBUFFER (buffer); |
1102 | } | |
1103 | ||
336cd056 | 1104 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1105 | } |
1106 | ||
a7ca3326 | 1107 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1108 | 1, 1, 0, |
7ee72033 MB |
1109 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1110 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1111 | (register Lisp_Object flag) |
1ab256cb RM |
1112 | { |
1113 | register int already; | |
1114 | register Lisp_Object fn; | |
8ec01c70 | 1115 | Lisp_Object buffer, window; |
1ab256cb RM |
1116 | |
1117 | #ifdef CLASH_DETECTION | |
1118 | /* If buffer becoming modified, lock the file. | |
1119 | If buffer becoming unmodified, unlock the file. */ | |
1120 | ||
4b4deea2 | 1121 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1122 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1123 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1124 | { |
336cd056 | 1125 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1126 | if (!already && !NILP (flag)) |
1ab256cb | 1127 | lock_file (fn); |
265a9e55 | 1128 | else if (already && NILP (flag)) |
1ab256cb RM |
1129 | unlock_file (fn); |
1130 | } | |
1131 | #endif /* CLASH_DETECTION */ | |
1132 | ||
0b5397c2 SM |
1133 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1134 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1135 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1136 | modify SAVE_MODIFF to affect one, we may affect the other | |
1137 | as well. | |
1138 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1139 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1140 | recent-auto-save-p from t to nil. | |
1141 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1142 | we risk changing recent-auto-save-p from nil to t. */ | |
1143 | SAVE_MODIFF = (NILP (flag) | |
1144 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1145 | ? MODIFF | |
1146 | /* Let's try to preserve recent-auto-save-p. */ | |
1147 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1148 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1149 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1150 | or increase MODIFF. */ | |
1151 | : MODIFF++); | |
177c0ea7 | 1152 | |
8ec01c70 GM |
1153 | /* Set update_mode_lines only if buffer is displayed in some window. |
1154 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1155 | state by recording/restoring the state around blocks of code. | |
1156 | Setting update_mode_lines makes redisplay consider all windows | |
1157 | (on all frames). Stealth fontification of buffers not displayed | |
1158 | would incur additional redisplay costs if we'd set | |
1159 | update_modes_lines unconditionally. | |
1160 | ||
1161 | Ideally, I think there should be another mechanism for fontifying | |
1162 | buffers without "modifying" buffers, or redisplay should be | |
1163 | smarter about updating the `*' in mode lines. --gerd */ | |
1164 | XSETBUFFER (buffer, current_buffer); | |
1165 | window = Fget_buffer_window (buffer, Qt); | |
1166 | if (WINDOWP (window)) | |
d57b83b3 GM |
1167 | { |
1168 | ++update_mode_lines; | |
1169 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1170 | } | |
177c0ea7 | 1171 | |
1ab256cb RM |
1172 | return flag; |
1173 | } | |
1174 | ||
a8c21b48 GM |
1175 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1176 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1177 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1178 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1179 | state of the current buffer. Use with care. */) |
5842a27b | 1180 | (Lisp_Object flag) |
a8c21b48 GM |
1181 | { |
1182 | #ifdef CLASH_DETECTION | |
1183 | Lisp_Object fn; | |
177c0ea7 | 1184 | |
a8c21b48 GM |
1185 | /* If buffer becoming modified, lock the file. |
1186 | If buffer becoming unmodified, unlock the file. */ | |
1187 | ||
4b4deea2 | 1188 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1189 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1190 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1191 | { |
1192 | int already = SAVE_MODIFF < MODIFF; | |
1193 | if (!already && !NILP (flag)) | |
1194 | lock_file (fn); | |
1195 | else if (already && NILP (flag)) | |
1196 | unlock_file (fn); | |
1197 | } | |
1198 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1199 | |
a8c21b48 GM |
1200 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1201 | return flag; | |
1202 | } | |
1203 | ||
1ab256cb | 1204 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1205 | 0, 1, 0, |
7ee72033 | 1206 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1207 | Each buffer has a tick counter which is incremented each time the |
1208 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1209 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1210 | (register Lisp_Object buffer) |
1ab256cb RM |
1211 | { |
1212 | register struct buffer *buf; | |
265a9e55 | 1213 | if (NILP (buffer)) |
1ab256cb RM |
1214 | buf = current_buffer; |
1215 | else | |
1216 | { | |
b7826503 | 1217 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1218 | buf = XBUFFER (buffer); |
1219 | } | |
1220 | ||
1221 | return make_number (BUF_MODIFF (buf)); | |
1222 | } | |
3e145152 CY |
1223 | |
1224 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1225 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1226 | doc: /* Return BUFFER's character-change tick counter. | |
1227 | Each buffer has a character-change tick counter, which is set to the | |
1228 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1229 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1230 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1231 | you can tell whether a character change occurred in that buffer in |
1232 | between these calls. No argument or nil as argument means use current | |
1233 | buffer as BUFFER. */) | |
5842a27b | 1234 | (register Lisp_Object buffer) |
3e145152 CY |
1235 | { |
1236 | register struct buffer *buf; | |
1237 | if (NILP (buffer)) | |
1238 | buf = current_buffer; | |
1239 | else | |
1240 | { | |
1241 | CHECK_BUFFER (buffer); | |
1242 | buf = XBUFFER (buffer); | |
1243 | } | |
1244 | ||
1245 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1246 | } | |
1ab256cb | 1247 | \f |
01050cb5 | 1248 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1249 | "(list (read-string \"Rename buffer (to new name): \" \ |
1250 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1251 | current-prefix-arg)", | |
7ee72033 | 1252 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1253 | If second arg UNIQUE is nil or omitted, it is an error if a |
1254 | buffer named NEWNAME already exists. | |
1255 | If UNIQUE is non-nil, come up with a new name using | |
1256 | `generate-new-buffer-name'. | |
1257 | Interactively, you can set UNIQUE with a prefix argument. | |
1258 | We return the name we actually gave the buffer. | |
7ee72033 | 1259 | This does not change the name of the visited file (if any). */) |
5842a27b | 1260 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1261 | { |
1262 | register Lisp_Object tem, buf; | |
1263 | ||
b7826503 | 1264 | CHECK_STRING (newname); |
d59698c4 | 1265 | |
d5db4077 | 1266 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1267 | error ("Empty string is invalid as a buffer name"); |
1268 | ||
489c043a | 1269 | tem = Fget_buffer (newname); |
265a9e55 | 1270 | if (!NILP (tem)) |
01050cb5 | 1271 | { |
8801a864 KR |
1272 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1273 | rename the buffer automatically so you can create another | |
1274 | with the original name. It makes UNIQUE equivalent to | |
1275 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1276 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1277 | return BVAR (current_buffer, name); |
3bd779aa | 1278 | if (!NILP (unique)) |
4b4deea2 | 1279 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1280 | else |
d5db4077 | 1281 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1282 | } |
1ab256cb | 1283 | |
4b4deea2 | 1284 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1285 | |
1286 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1287 | any windows displaying current_buffer will stay unchanged. */ | |
1288 | update_mode_lines++; | |
1289 | ||
67180c6a | 1290 | XSETBUFFER (buf, current_buffer); |
489c043a | 1291 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1292 | if (NILP (BVAR (current_buffer, filename)) |
1293 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1294 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1295 | |
1296 | /* Run buffer-list-update-hook. */ | |
1297 | if (!NILP (Vrun_hooks)) | |
1298 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1299 | ||
fb5eba9c | 1300 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1301 | return BVAR (current_buffer, name); |
1ab256cb RM |
1302 | } |
1303 | ||
a7ca3326 | 1304 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1305 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1306 | Buffers not visible in windows are preferred to visible buffers, unless |
1307 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1308 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1309 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1310 | frame's buffer list. | |
1311 | ||
1312 | The buffer is found by scanning the selected or specified frame's buffer | |
1313 | list first, followed by the list of all buffers. If no other buffer | |
1314 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1315 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1316 | { |
9397e56f MR |
1317 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1318 | Lisp_Object tail, buf, pred; | |
1319 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1320 | |
773fbdb9 | 1321 | if (NILP (frame)) |
9ba9623d | 1322 | frame = selected_frame; |
773fbdb9 | 1323 | |
d234d13e JL |
1324 | CHECK_FRAME (frame); |
1325 | ||
773fbdb9 | 1326 | pred = frame_buffer_predicate (frame); |
9397e56f | 1327 | /* Consider buffers that have been seen in the frame first. */ |
e34f7f79 | 1328 | tail = FVAR (XFRAME (frame), buffer_list); |
9397e56f | 1329 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1330 | { |
9397e56f MR |
1331 | buf = XCAR (tail); |
1332 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1333 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1334 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1335 | /* If the frame has a buffer_predicate, disregard buffers that | |
1336 | don't fit the predicate. */ | |
1337 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1338 | { | |
1339 | if (!NILP (visible_ok) | |
1340 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1341 | return buf; | |
1342 | else if (NILP (notsogood)) | |
1343 | notsogood = buf; | |
1344 | } | |
7962a441 | 1345 | } |
7962a441 | 1346 | |
9397e56f MR |
1347 | /* Consider alist of all buffers next. */ |
1348 | tail = Vbuffer_alist; | |
6d70a280 | 1349 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1350 | { |
6d70a280 | 1351 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1352 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1353 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1354 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1355 | /* If the frame has a buffer_predicate, disregard buffers that | |
1356 | don't fit the predicate. */ | |
1357 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1358 | { | |
1359 | if (!NILP (visible_ok) | |
1360 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1361 | return buf; | |
1362 | else if (NILP (notsogood)) | |
1363 | notsogood = buf; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | if (!NILP (notsogood)) | |
1368 | return notsogood; | |
1369 | else | |
1370 | { | |
1371 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1372 | if (NILP (buf)) |
04ae1b48 | 1373 | { |
9397e56f MR |
1374 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1375 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1376 | } |
9397e56f MR |
1377 | return buf; |
1378 | } | |
1379 | } | |
04ae1b48 | 1380 | |
9397e56f MR |
1381 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1382 | pay attention to any frame-local buffer lists, doesn't care about | |
1383 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1384 | ||
1385 | Lisp_Object | |
1386 | other_buffer_safely (Lisp_Object buffer) | |
1387 | { | |
1388 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1389 | Lisp_Object tail, buf; | |
1390 | ||
1391 | tail = Vbuffer_alist; | |
1392 | for (; CONSP (tail); tail = XCDR (tail)) | |
1393 | { | |
1394 | buf = Fcdr (XCAR (tail)); | |
1395 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1396 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1397 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1398 | return buf; |
1ab256cb | 1399 | } |
9397e56f | 1400 | |
dba1a30a GM |
1401 | buf = Fget_buffer (build_string ("*scratch*")); |
1402 | if (NILP (buf)) | |
1403 | { | |
1404 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1405 | Fset_buffer_major_mode (buf); | |
1406 | } | |
9397e56f | 1407 | |
89132f25 | 1408 | return buf; |
1ab256cb RM |
1409 | } |
1410 | \f | |
a7ca3326 | 1411 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1412 | 0, 1, "", |
7ee72033 MB |
1413 | doc: /* Start keeping undo information for buffer BUFFER. |
1414 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1415 | (register Lisp_Object buffer) |
1ab256cb | 1416 | { |
ffd56f97 | 1417 | Lisp_Object real_buffer; |
1ab256cb | 1418 | |
ffd56f97 | 1419 | if (NILP (buffer)) |
67180c6a | 1420 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1421 | else |
1422 | { | |
ffd56f97 JB |
1423 | real_buffer = Fget_buffer (buffer); |
1424 | if (NILP (real_buffer)) | |
1425 | nsberror (buffer); | |
1ab256cb RM |
1426 | } |
1427 | ||
4b4deea2 TT |
1428 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1429 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1430 | |
1431 | return Qnil; | |
1432 | } | |
1433 | ||
9cd47b72 DA |
1434 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1435 | ||
1436 | int | |
1437 | compact_buffer (struct buffer *buffer) | |
1438 | { | |
9928463d DA |
1439 | /* Verify indirection counters. */ |
1440 | if (buffer->base_buffer) | |
1441 | { | |
1442 | eassert (buffer->indirections == -1); | |
1443 | eassert (buffer->base_buffer->indirections > 0); | |
1444 | } | |
1445 | else | |
1446 | eassert (buffer->indirections >= 0); | |
1447 | ||
9cd47b72 DA |
1448 | /* Skip dead buffers, indirect buffers and buffers |
1449 | which aren't changed since last compaction. */ | |
e34f7f79 | 1450 | if (!NILP (buffer->INTERNAL_FIELD (name)) |
9cd47b72 DA |
1451 | && (buffer->base_buffer == NULL) |
1452 | && (buffer->text->compact != buffer->text->modiff)) | |
1453 | { | |
1454 | /* If a buffer's undo list is Qt, that means that undo is | |
1455 | turned off in that buffer. Calling truncate_undo_list on | |
1456 | Qt tends to return NULL, which effectively turns undo back on. | |
1457 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1458 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1459 | truncate_undo_list (buffer); |
1460 | ||
1461 | /* Shrink buffer gaps. */ | |
1462 | if (!buffer->text->inhibit_shrinking) | |
1463 | { | |
1464 | /* If a buffer's gap size is more than 10% of the buffer | |
1465 | size, or larger than 2000 bytes, then shrink it | |
1466 | accordingly. Keep a minimum size of 20 bytes. */ | |
1467 | int size = min (2000, max (20, (buffer->text->z_byte / 10))); | |
1468 | ||
1469 | if (buffer->text->gap_size > size) | |
1470 | { | |
1471 | struct buffer *save_current = current_buffer; | |
1472 | current_buffer = buffer; | |
1473 | make_gap (-(buffer->text->gap_size - size)); | |
1474 | current_buffer = save_current; | |
1475 | } | |
1476 | } | |
1477 | buffer->text->compact = buffer->text->modiff; | |
1478 | return 1; | |
1479 | } | |
1480 | return 0; | |
1481 | } | |
1482 | ||
a7ca3326 | 1483 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1484 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1485 | The argument may be a buffer or the name of an existing buffer. |
1486 | Argument nil or omitted means kill the current buffer. Return t if the | |
1487 | buffer is actually killed, nil otherwise. | |
1488 | ||
b7e8d081 MR |
1489 | The functions in `kill-buffer-query-functions' are called with the |
1490 | buffer to be killed as the current buffer. If any of them returns nil, | |
1491 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1492 | buffer is actually killed. The buffer being killed will be current | |
1493 | while the hook is running. Functions called by any of these hooks are | |
1494 | supposed to not change the current buffer. | |
018ba359 PJ |
1495 | |
1496 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1497 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1498 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1499 | (Lisp_Object buffer_or_name) |
1ab256cb | 1500 | { |
c8804c4f | 1501 | Lisp_Object buffer; |
1ab256cb RM |
1502 | register struct buffer *b; |
1503 | register Lisp_Object tem; | |
1504 | register struct Lisp_Marker *m; | |
6af718a4 | 1505 | struct gcpro gcpro1; |
1ab256cb | 1506 | |
c8804c4f MR |
1507 | if (NILP (buffer_or_name)) |
1508 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1509 | else |
c8804c4f MR |
1510 | buffer = Fget_buffer (buffer_or_name); |
1511 | if (NILP (buffer)) | |
1512 | nsberror (buffer_or_name); | |
1ab256cb | 1513 | |
c8804c4f | 1514 | b = XBUFFER (buffer); |
1ab256cb | 1515 | |
4a4a9db5 | 1516 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1517 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1518 | return Qnil; |
1519 | ||
1ab256cb | 1520 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1521 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1522 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1523 | { |
c8804c4f | 1524 | GCPRO1 (buffer); |
5c4930b0 | 1525 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1526 | BVAR (b, name), make_number (0))); |
1ab256cb | 1527 | UNGCPRO; |
265a9e55 | 1528 | if (NILP (tem)) |
1ab256cb RM |
1529 | return Qnil; |
1530 | } | |
1531 | ||
dcdffbf6 | 1532 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1533 | { |
d311d28c | 1534 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1535 | Lisp_Object arglist[1]; |
1ab256cb RM |
1536 | |
1537 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1538 | set_buffer_internal (b); | |
dcdffbf6 RS |
1539 | |
1540 | /* First run the query functions; if any query is answered no, | |
1541 | don't kill the buffer. */ | |
5b20caf0 | 1542 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1543 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1544 | if (NILP (tem)) | |
5b20caf0 | 1545 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1546 | |
1547 | /* Then run the hooks. */ | |
f1597a3a | 1548 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1549 | unbind_to (count, Qnil); |
1550 | } | |
1551 | ||
b7e8d081 MR |
1552 | /* If the hooks have killed the buffer, exit now. */ |
1553 | if (NILP (BVAR (b, name))) | |
1554 | return Qt; | |
1555 | ||
1ab256cb RM |
1556 | /* We have no more questions to ask. Verify that it is valid |
1557 | to kill the buffer. This must be done after the questions | |
1558 | since anything can happen within do_yes_or_no_p. */ | |
1559 | ||
1560 | /* Don't kill the minibuffer now current. */ | |
3a45383a | 1561 | if (EQ (buffer, WVAR (XWINDOW (minibuf_window), buffer))) |
1ab256cb RM |
1562 | return Qnil; |
1563 | ||
9928463d DA |
1564 | /* When we kill an ordinary buffer which shares it's buffer text |
1565 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1566 | We do it at this stage so nothing terrible happens if they |
1567 | ask questions or their hooks get errors. */ | |
9928463d | 1568 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1569 | { |
1570 | struct buffer *other; | |
1571 | ||
c8804c4f | 1572 | GCPRO1 (buffer); |
336cd056 | 1573 | |
52b852c7 | 1574 | FOR_EACH_BUFFER (other) |
d17337e5 | 1575 | if (other->base_buffer == b) |
336cd056 | 1576 | { |
8f54f30a PE |
1577 | Lisp_Object buf; |
1578 | XSETBUFFER (buf, other); | |
1579 | Fkill_buffer (buf); | |
336cd056 RS |
1580 | } |
1581 | ||
1582 | UNGCPRO; | |
b7e8d081 MR |
1583 | |
1584 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
1585 | if (NILP (BVAR (b, name))) | |
1586 | return Qt; | |
336cd056 | 1587 | } |
177c0ea7 | 1588 | |
56e2e794 MR |
1589 | /* Run replace_buffer_in_windows before making another buffer current |
1590 | since set-window-buffer-start-and-point will refuse to make another | |
1591 | buffer current if the selected window does not show the current | |
1592 | buffer. (Bug#10114) */ | |
1593 | replace_buffer_in_windows (buffer); | |
1594 | ||
b7e8d081 MR |
1595 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
1596 | if (NILP (BVAR (b, name))) | |
1597 | return Qt; | |
1598 | ||
1599 | /* Make this buffer not be current. Exit if it is the sole visible | |
1600 | buffer. */ | |
1ab256cb RM |
1601 | if (b == current_buffer) |
1602 | { | |
c8804c4f | 1603 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1604 | Fset_buffer (tem); |
1605 | if (b == current_buffer) | |
1606 | return Qnil; | |
1607 | } | |
1608 | ||
b7e8d081 MR |
1609 | /* If the buffer now current is shown in the minibuffer and our buffer |
1610 | is the sole other buffer give up. */ | |
77270fac | 1611 | XSETBUFFER (tem, current_buffer); |
3a45383a | 1612 | if (EQ (tem, WVAR (XWINDOW (minibuf_window), buffer)) |
b7e8d081 MR |
1613 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1614 | return Qnil; | |
77270fac | 1615 | |
1ab256cb RM |
1616 | /* Now there is no question: we can kill the buffer. */ |
1617 | ||
1618 | #ifdef CLASH_DETECTION | |
1619 | /* Unlock this buffer's file, if it is locked. */ | |
1620 | unlock_buffer (b); | |
1621 | #endif /* CLASH_DETECTION */ | |
1622 | ||
c8804c4f MR |
1623 | GCPRO1 (buffer); |
1624 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1625 | UNGCPRO; |
1626 | ||
b7e8d081 MR |
1627 | /* Killing buffer processes may run sentinels which may have killed |
1628 | our buffer. */ | |
4b4deea2 | 1629 | if (NILP (BVAR (b, name))) |
b7e8d081 | 1630 | return Qt; |
49da74e6 | 1631 | |
9397e56f MR |
1632 | /* These may run Lisp code and into infinite loops (if someone |
1633 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1634 | frames_discard_buffer (buffer); |
1635 | ||
b93fb365 | 1636 | clear_charpos_cache (b); |
1ab256cb RM |
1637 | |
1638 | tem = Vinhibit_quit; | |
1639 | Vinhibit_quit = Qt; | |
9397e56f | 1640 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1641 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1642 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1643 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1644 | Vinhibit_quit = tem; |
1645 | ||
9cf712eb RS |
1646 | /* Delete any auto-save file, if we saved it in this session. |
1647 | But not if the buffer is modified. */ | |
4b4deea2 | 1648 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1649 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1650 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1651 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1652 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1653 | { |
8f54f30a PE |
1654 | Lisp_Object delete; |
1655 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1656 | if (! NILP (delete)) | |
4b4deea2 | 1657 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1658 | } |
1659 | ||
b7e8d081 MR |
1660 | /* Deleting an auto-save file could have killed our buffer. */ |
1661 | if (NILP (BVAR (b, name))) | |
1662 | return Qt; | |
1663 | ||
4a4a9db5 KH |
1664 | if (b->base_buffer) |
1665 | { | |
1666 | /* Unchain all markers that belong to this indirect buffer. | |
1667 | Don't unchain the markers that belong to the base buffer | |
1668 | or its other indirect buffers. */ | |
65745fad | 1669 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1670 | { |
65745fad | 1671 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1672 | if (m->buffer == b) |
65745fad SM |
1673 | unchain_marker (m); |
1674 | m = next; | |
4a4a9db5 KH |
1675 | } |
1676 | } | |
1677 | else | |
1ab256cb | 1678 | { |
4a4a9db5 | 1679 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1680 | and leave them pointing nowhere. */ |
65745fad | 1681 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1682 | { |
65745fad | 1683 | struct Lisp_Marker *next = m->next; |
336cd056 | 1684 | m->buffer = 0; |
65745fad SM |
1685 | m->next = NULL; |
1686 | m = next; | |
336cd056 | 1687 | } |
65745fad | 1688 | BUF_MARKERS (b) = NULL; |
336cd056 | 1689 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1690 | |
1691 | /* Perhaps we should explicitly free the interval tree here... */ | |
1692 | } | |
33f7013e | 1693 | |
2f3f993b RS |
1694 | /* Reset the local variables, so that this buffer's local values |
1695 | won't be protected from GC. They would be protected | |
e4769531 | 1696 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1697 | This gets rid of them for certain. */ |
1698 | swap_out_buffer_local_variables (b); | |
13de9290 | 1699 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1700 | |
4b4deea2 | 1701 | BVAR (b, name) = Qnil; |
336cd056 | 1702 | |
9ac0d9e0 | 1703 | BLOCK_INPUT; |
04e9897c DA |
1704 | if (b->base_buffer) |
1705 | { | |
1706 | /* Notify our base buffer that we don't share the text anymore. */ | |
1707 | eassert (b->indirections == -1); | |
1708 | b->base_buffer->indirections--; | |
1709 | eassert (b->base_buffer->indirections >= 0); | |
1710 | } | |
1711 | else | |
1712 | /* No one shares our buffer text, can free it. */ | |
b86af064 | 1713 | free_buffer_text (b); |
336cd056 | 1714 | |
28e969dd JB |
1715 | if (b->newline_cache) |
1716 | { | |
1717 | free_region_cache (b->newline_cache); | |
1718 | b->newline_cache = 0; | |
1719 | } | |
1720 | if (b->width_run_cache) | |
1721 | { | |
1722 | free_region_cache (b->width_run_cache); | |
1723 | b->width_run_cache = 0; | |
1724 | } | |
4b4deea2 | 1725 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1726 | UNBLOCK_INPUT; |
4b4deea2 | 1727 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1728 | |
9397e56f MR |
1729 | /* Run buffer-list-update-hook. */ |
1730 | if (!NILP (Vrun_hooks)) | |
1731 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1732 | ||
1ab256cb RM |
1733 | return Qt; |
1734 | } | |
1735 | \f | |
9397e56f MR |
1736 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1737 | we do this each time BUFFER is selected visibly, the more recently | |
1738 | selected buffers are always closer to the front of those lists. This | |
1739 | means that other_buffer is more likely to choose a relevant buffer. | |
1740 | ||
1741 | Note that this moves BUFFER to the front of the buffer lists of the | |
1742 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1743 | shown in the selected frame, consider the present behavior a feature. | |
1744 | `select-window' gets this right since it shows BUFFER in the selected | |
1745 | window when calling us. */ | |
1ab256cb | 1746 | |
01136e9b | 1747 | void |
9397e56f | 1748 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1749 | { |
4475bec4 | 1750 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1751 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1752 | |
9397e56f | 1753 | CHECK_BUFFER (buffer); |
1ab256cb | 1754 | |
9397e56f MR |
1755 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1756 | Don't allow quitting since this might leave the buffer list in an | |
1757 | inconsistent state. */ | |
1758 | tem = Vinhibit_quit; | |
1759 | Vinhibit_quit = Qt; | |
1760 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1761 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1762 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1763 | XSETCDR (aelt_cons, Vbuffer_alist); |
1764 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1765 | Vinhibit_quit = tem; |
1ab256cb | 1766 | |
9397e56f | 1767 | /* Update buffer list of selected frame. */ |
e34f7f79 DA |
1768 | FVAR (f, buffer_list) = Fcons (buffer, Fdelq (buffer, FVAR (f, buffer_list))); |
1769 | FVAR (f, buried_buffer_list) = Fdelq (buffer, FVAR (f, buried_buffer_list)); | |
177c0ea7 | 1770 | |
9397e56f MR |
1771 | /* Run buffer-list-update-hook. */ |
1772 | if (!NILP (Vrun_hooks)) | |
1773 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1774 | } | |
7962a441 | 1775 | |
7962a441 | 1776 | |
e4ed06f1 CY |
1777 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1778 | buffer is killed. For the selected frame's buffer list this moves | |
1779 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 1780 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 1781 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 1782 | |
e4ed06f1 CY |
1783 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1784 | 1, 1, 0, | |
1785 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1786 | (Lisp_Object buffer) |
1787 | { | |
4475bec4 | 1788 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1789 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1790 | |
9397e56f | 1791 | CHECK_BUFFER (buffer); |
177c0ea7 | 1792 | |
9397e56f MR |
1793 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1794 | Don't allow quitting since this might leave the buffer list in an | |
1795 | inconsistent state. */ | |
1796 | tem = Vinhibit_quit; | |
1797 | Vinhibit_quit = Qt; | |
1798 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1799 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1800 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1801 | XSETCDR (aelt_cons, Qnil); |
1802 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1803 | Vinhibit_quit = tem; |
1804 | ||
1805 | /* Update buffer lists of selected frame. */ | |
e34f7f79 DA |
1806 | FVAR (f, buffer_list) = Fdelq (buffer, FVAR (f, buffer_list)); |
1807 | FVAR (f, buried_buffer_list) | |
1808 | = Fcons (buffer, Fdelq (buffer, FVAR (f, buried_buffer_list))); | |
9397e56f MR |
1809 | |
1810 | /* Run buffer-list-update-hook. */ | |
1811 | if (!NILP (Vrun_hooks)) | |
1812 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1813 | ||
e4ed06f1 | 1814 | return Qnil; |
1ab256cb RM |
1815 | } |
1816 | ||
a9ee7a59 | 1817 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1818 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1819 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1820 | according to `default-major-mode'. |
018ba359 | 1821 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1822 | the current buffer's major mode. */) |
5842a27b | 1823 | (Lisp_Object buffer) |
a9ee7a59 | 1824 | { |
d311d28c | 1825 | ptrdiff_t count; |
a9ee7a59 KH |
1826 | Lisp_Object function; |
1827 | ||
ea4fddd8 JB |
1828 | CHECK_BUFFER (buffer); |
1829 | ||
4b4deea2 TT |
1830 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1831 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1832 | function = find_symbol_value (intern ("initial-major-mode")); |
1833 | else | |
1834 | { | |
4b4deea2 | 1835 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1836 | if (NILP (function) |
4b4deea2 TT |
1837 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1838 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1839 | } |
177c0ea7 | 1840 | |
48265e61 DL |
1841 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1842 | return Qnil; | |
1843 | ||
aed13378 | 1844 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1845 | |
48265e61 DL |
1846 | /* To select a nonfundamental mode, |
1847 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1848 | |
1849 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1850 | ||
a2428fa2 | 1851 | Fset_buffer (buffer); |
48265e61 | 1852 | call0 (function); |
a9ee7a59 KH |
1853 | |
1854 | return unbind_to (count, Qnil); | |
1855 | } | |
1856 | ||
a7ca3326 | 1857 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1858 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1859 | (void) |
1ab256cb RM |
1860 | { |
1861 | register Lisp_Object buf; | |
67180c6a | 1862 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1863 | return buf; |
1864 | } | |
1865 | \f | |
7ec44ec6 GM |
1866 | /* Set the current buffer to B. |
1867 | ||
1868 | We previously set windows_or_buffers_changed here to invalidate | |
1869 | global unchanged information in beg_unchanged and end_unchanged. | |
1870 | This is no longer necessary because we now compute unchanged | |
1871 | information on a buffer-basis. Every action affecting other | |
1872 | windows than the selected one requires a select_window at some | |
1873 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1874 | |
1875 | void | |
d3da34e0 | 1876 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1877 | { |
b5a225b4 | 1878 | if (current_buffer != b) |
7ec44ec6 | 1879 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1880 | } |
1881 | ||
1882 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1883 | This is used by redisplay. */ | |
1884 | ||
1885 | void | |
d3da34e0 | 1886 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1887 | { |
1888 | register struct buffer *old_buf; | |
ce5b453a | 1889 | register Lisp_Object tail; |
c7aa5005 | 1890 | |
b86af064 | 1891 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1892 | if (b->text->beg == NULL) |
b86af064 GM |
1893 | enlarge_buffer_text (b, 0); |
1894 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1895 | |
c7aa5005 KH |
1896 | if (current_buffer == b) |
1897 | return; | |
1898 | ||
1ab256cb RM |
1899 | old_buf = current_buffer; |
1900 | current_buffer = b; | |
1901 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1902 | ||
336cd056 RS |
1903 | if (old_buf) |
1904 | { | |
1905 | /* Put the undo list back in the base buffer, so that it appears | |
1906 | that an indirect buffer shares the undo list of its base. */ | |
1907 | if (old_buf->base_buffer) | |
4b4deea2 | 1908 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1909 | |
1910 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1911 | when it is not current, update them now. */ | |
cffc6f3b | 1912 | record_buffer_markers (old_buf); |
336cd056 RS |
1913 | } |
1914 | ||
1915 | /* Get the undo list from the base buffer, so that it appears | |
1916 | that an indirect buffer shares the undo list of its base. */ | |
1917 | if (b->base_buffer) | |
4b4deea2 | 1918 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1919 | |
1920 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1921 | when it is not current, fetch them now. */ | |
cffc6f3b | 1922 | fetch_buffer_markers (b); |
336cd056 | 1923 | |
1ab256cb RM |
1924 | /* Look down buffer's list of local Lisp variables |
1925 | to find and update any that forward into C variables. */ | |
1926 | ||
ce5b453a | 1927 | do |
1ab256cb | 1928 | { |
4b4deea2 | 1929 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1930 | { |
1931 | Lisp_Object var = XCAR (XCAR (tail)); | |
1932 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1933 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1934 | && SYMBOL_BLV (sym)->fwd) | |
1935 | /* Just reference the variable | |
1936 | to cause it to become set for this buffer. */ | |
1937 | Fsymbol_value (var); | |
1938 | } | |
1ab256cb | 1939 | } |
1ab256cb | 1940 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1941 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1942 | } |
1943 | ||
336cd056 | 1944 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1945 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1946 | |
1947 | void | |
d3da34e0 | 1948 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1949 | { |
1950 | register struct buffer *old_buf; | |
1951 | ||
1952 | if (current_buffer == b) | |
1953 | return; | |
1954 | ||
1955 | old_buf = current_buffer; | |
1956 | current_buffer = b; | |
1957 | ||
cffc6f3b CY |
1958 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1959 | when it is not current, update them now. */ | |
1960 | record_buffer_markers (old_buf); | |
336cd056 RS |
1961 | |
1962 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1963 | when it is not current, fetch them now. */ | |
cffc6f3b | 1964 | fetch_buffer_markers (b); |
336cd056 RS |
1965 | } |
1966 | ||
a7ca3326 | 1967 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1968 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1969 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1970 | also `save-excursion' when you want to make a buffer current | |
1971 | temporarily. This function does not display the buffer, so its effect | |
1972 | ends when the current command terminates. Use `switch-to-buffer' or | |
1973 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1974 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1975 | { |
c8804c4f MR |
1976 | register Lisp_Object buffer; |
1977 | buffer = Fget_buffer (buffer_or_name); | |
1978 | if (NILP (buffer)) | |
1979 | nsberror (buffer_or_name); | |
4b4deea2 | 1980 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1981 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1982 | set_buffer_internal (XBUFFER (buffer)); |
1983 | return buffer; | |
1ab256cb | 1984 | } |
d0628b06 RS |
1985 | |
1986 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1987 | ||
1988 | Lisp_Object | |
d3da34e0 | 1989 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1990 | { |
4b4deea2 | 1991 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1992 | Fset_buffer (buffer); |
1993 | return Qnil; | |
1994 | } | |
1ab256cb | 1995 | \f |
a7ca3326 | 1996 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1997 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1998 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1999 | (void) |
1ab256cb | 2000 | { |
4b4deea2 | 2001 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2002 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2003 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2004 | return Qnil; |
2005 | } | |
1ab256cb | 2006 | \f |
a7ca3326 | 2007 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2008 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2009 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2010 | so the buffer is truly empty after this. */) |
5842a27b | 2011 | (void) |
1ab256cb RM |
2012 | { |
2013 | Fwiden (); | |
c0d9a0c3 GM |
2014 | |
2015 | del_range (BEG, Z); | |
c280bc6a | 2016 | |
1ab256cb RM |
2017 | current_buffer->last_window_start = 1; |
2018 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2019 | if future size is less than past size. Use of erase-buffer | |
2020 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2021 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2022 | return Qnil; |
2023 | } | |
2024 | ||
01136e9b | 2025 | void |
d3da34e0 | 2026 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2027 | { |
b7826503 PJ |
2028 | CHECK_NUMBER_COERCE_MARKER (*b); |
2029 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2030 | |
2031 | if (XINT (*b) > XINT (*e)) | |
2032 | { | |
03192067 KH |
2033 | Lisp_Object tem; |
2034 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2035 | } |
2036 | ||
d311d28c | 2037 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2038 | args_out_of_range (*b, *e); |
2039 | } | |
2040 | \f | |
b05525fa RS |
2041 | /* Advance BYTE_POS up to a character boundary |
2042 | and return the adjusted position. */ | |
2043 | ||
d311d28c PE |
2044 | static ptrdiff_t |
2045 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2046 | { |
f8449323 | 2047 | int c; |
b05525fa | 2048 | |
f8449323 RS |
2049 | if (byte_pos == BEG) |
2050 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2051 | return BEG; |
f8449323 RS |
2052 | |
2053 | c = FETCH_BYTE (byte_pos); | |
2054 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2055 | { |
1be6387d | 2056 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2057 | multibyte sequence. */ |
d311d28c | 2058 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2059 | |
2060 | do | |
2061 | { | |
2062 | byte_pos--; | |
2063 | c = FETCH_BYTE (byte_pos); | |
2064 | } | |
2065 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2066 | INC_POS (byte_pos); |
a9bcded1 KH |
2067 | if (byte_pos < orig_byte_pos) |
2068 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2069 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2070 | surely advance to the correct character boundary. If C is | |
2071 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2072 | } |
2073 | ||
20773569 | 2074 | return byte_pos; |
b05525fa RS |
2075 | } |
2076 | ||
13cda5f9 SM |
2077 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2078 | 1, 1, 0, | |
2079 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2080 | (Lisp_Object buffer) |
13cda5f9 SM |
2081 | { |
2082 | struct buffer *other_buffer; | |
2083 | CHECK_BUFFER (buffer); | |
2084 | other_buffer = XBUFFER (buffer); | |
2085 | ||
4b4deea2 | 2086 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2087 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2088 | |
13cda5f9 SM |
2089 | /* Actually, it probably works just fine. |
2090 | * if (other_buffer == current_buffer) | |
2091 | * error ("Cannot swap a buffer's text with itself"); */ | |
2092 | ||
2093 | /* Actually, this may be workable as well, tho probably only if they're | |
2094 | *both* indirect. */ | |
2095 | if (other_buffer->base_buffer | |
2096 | || current_buffer->base_buffer) | |
2097 | error ("Cannot swap indirect buffers's text"); | |
2098 | ||
2099 | { /* This is probably harder to make work. */ | |
2100 | struct buffer *other; | |
52b852c7 | 2101 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2102 | if (other->base_buffer == other_buffer |
2103 | || other->base_buffer == current_buffer) | |
2104 | error ("One of the buffers to swap has indirect buffers"); | |
2105 | } | |
2106 | ||
2107 | #define swapfield(field, type) \ | |
2108 | do { \ | |
2109 | type tmp##field = other_buffer->field; \ | |
2110 | other_buffer->field = current_buffer->field; \ | |
2111 | current_buffer->field = tmp##field; \ | |
2112 | } while (0) | |
5d8ea120 TT |
2113 | #define swapfield_(field, type) \ |
2114 | do { \ | |
4b4deea2 TT |
2115 | type tmp##field = BVAR (other_buffer, field); \ |
2116 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2117 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2118 | } while (0) |
13cda5f9 SM |
2119 | |
2120 | swapfield (own_text, struct buffer_text); | |
2121 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2122 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2123 | #ifdef REL_ALLOC |
261cb4bb PE |
2124 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2125 | (void **) &other_buffer->own_text.beg); | |
2126 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2127 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2128 | #endif /* REL_ALLOC */ |
2129 | ||
d311d28c PE |
2130 | swapfield (pt, ptrdiff_t); |
2131 | swapfield (pt_byte, ptrdiff_t); | |
2132 | swapfield (begv, ptrdiff_t); | |
2133 | swapfield (begv_byte, ptrdiff_t); | |
2134 | swapfield (zv, ptrdiff_t); | |
2135 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2136 | eassert (!current_buffer->base_buffer); |
2137 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2138 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2139 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2140 | swapfield (newline_cache, struct region_cache *); | |
2141 | swapfield (width_run_cache, struct region_cache *); | |
2142 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2143 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2144 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2145 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2146 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2147 | swapfield_ (undo_list, Lisp_Object); |
2148 | swapfield_ (mark, Lisp_Object); | |
2149 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2150 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2151 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2152 | /* FIXME: Not sure what we should do with these *_marker fields. |
2153 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2154 | swapfield_ (pt_marker, Lisp_Object); |
2155 | swapfield_ (begv_marker, Lisp_Object); | |
2156 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2157 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2158 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2159 | |
2160 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2161 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2162 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2163 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2164 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2165 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2166 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2167 | { |
2168 | struct Lisp_Marker *m; | |
2169 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2170 | if (m->buffer == other_buffer) | |
2171 | m->buffer = current_buffer; | |
b8ff72fa SM |
2172 | else |
2173 | /* Since there's no indirect buffer in sight, markers on | |
2174 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2175 | eassert (!m->buffer); | |
13cda5f9 SM |
2176 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2177 | if (m->buffer == current_buffer) | |
2178 | m->buffer = other_buffer; | |
b8ff72fa SM |
2179 | else |
2180 | /* Since there's no indirect buffer in sight, markers on | |
2181 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2182 | eassert (!m->buffer); | |
13cda5f9 | 2183 | } |
126f1fc1 SM |
2184 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2185 | So since we just swapped the markers between the two buffers, we need | |
2186 | to undo the effect of this swap for window markers. */ | |
2187 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2188 | Lisp_Object buf1, buf2; | |
2189 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2190 | ||
2191 | while (NILP (Fmemq (w, ws))) | |
2192 | { | |
2193 | ws = Fcons (w, ws); | |
3a45383a DA |
2194 | if (MARKERP (WVAR (XWINDOW (w), pointm)) |
2195 | && (EQ (WVAR (XWINDOW (w), buffer), buf1) | |
2196 | || EQ (WVAR (XWINDOW (w), buffer), buf2))) | |
2197 | Fset_marker (WVAR (XWINDOW (w), pointm), | |
2198 | make_number | |
2199 | (BUF_BEGV (XBUFFER (WVAR (XWINDOW (w), buffer)))), | |
2200 | WVAR (XWINDOW (w), buffer)); | |
126f1fc1 SM |
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 | ||
a7ca3326 | 2215 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 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; |
d311d28c | 2230 | ptrdiff_t 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 | { | |
d311d28c | 2262 | ptrdiff_t 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 | { | |
d311d28c PE |
2326 | ptrdiff_t pt = PT; |
2327 | ptrdiff_t 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 | { |
d311d28c | 2343 | ptrdiff_t 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 | { | |
d311d28c PE |
2427 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2428 | ptrdiff_t 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. */ | |
52b852c7 | 2480 | FOR_EACH_BUFFER (other) |
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 | |
a7ca3326 | 2504 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2505 | Skill_all_local_variables, 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 | |
e4769531 | 2557 | now cached. */ |
ce5b453a | 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 | 2588 | |
b081724f PE |
2589 | ptrdiff_t |
2590 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2591 | ptrdiff_t *len_ptr, | |
d311d28c | 2592 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, int change_req) |
1ab256cb | 2593 | { |
2410d73a SM |
2594 | Lisp_Object overlay, start, end; |
2595 | struct Lisp_Overlay *tail; | |
b081724f PE |
2596 | ptrdiff_t idx = 0; |
2597 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2598 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2599 | ptrdiff_t next = ZV; |
2600 | ptrdiff_t prev = BEGV; | |
61d54cd5 RS |
2601 | int inhibit_storing = 0; |
2602 | ||
2410d73a | 2603 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2604 | { |
d311d28c | 2605 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2606 | |
2410d73a | 2607 | XSETMISC (overlay, tail); |
1ab256cb | 2608 | |
2eec3b4e RS |
2609 | start = OVERLAY_START (overlay); |
2610 | end = OVERLAY_END (overlay); | |
239c932b RS |
2611 | endpos = OVERLAY_POSITION (end); |
2612 | if (endpos < pos) | |
2613 | { | |
2614 | if (prev < endpos) | |
2615 | prev = endpos; | |
2616 | break; | |
2617 | } | |
413e06a4 RS |
2618 | startpos = OVERLAY_POSITION (start); |
2619 | /* This one ends at or after POS | |
daa1c109 | 2620 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2621 | if (prev < startpos && startpos < pos) |
2622 | prev = startpos; | |
239c932b RS |
2623 | if (endpos == pos) |
2624 | continue; | |
2eec3b4e RS |
2625 | if (startpos <= pos) |
2626 | { | |
2627 | if (idx == len) | |
2628 | { | |
61d54cd5 RS |
2629 | /* The supplied vector is full. |
2630 | Either make it bigger, or don't store any more in it. */ | |
2631 | if (extend) | |
2632 | { | |
0065d054 PE |
2633 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2634 | sizeof *vec); | |
61d54cd5 | 2635 | *vec_ptr = vec; |
0065d054 | 2636 | len = *len_ptr; |
61d54cd5 RS |
2637 | } |
2638 | else | |
2639 | inhibit_storing = 1; | |
2eec3b4e | 2640 | } |
61d54cd5 RS |
2641 | |
2642 | if (!inhibit_storing) | |
2643 | vec[idx] = overlay; | |
2644 | /* Keep counting overlays even if we can't return them all. */ | |
2645 | idx++; | |
2eec3b4e RS |
2646 | } |
2647 | else if (startpos < next) | |
2648 | next = startpos; | |
2649 | } | |
2650 | ||
2410d73a | 2651 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2652 | { |
d311d28c | 2653 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2654 | |
2410d73a | 2655 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2656 | |
2657 | start = OVERLAY_START (overlay); | |
2658 | end = OVERLAY_END (overlay); | |
2659 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2660 | if (pos < startpos) |
2eec3b4e RS |
2661 | { |
2662 | if (startpos < next) | |
2663 | next = startpos; | |
2664 | break; | |
2665 | } | |
239c932b RS |
2666 | endpos = OVERLAY_POSITION (end); |
2667 | if (pos < endpos) | |
2eec3b4e RS |
2668 | { |
2669 | if (idx == len) | |
2670 | { | |
61d54cd5 RS |
2671 | if (extend) |
2672 | { | |
0065d054 PE |
2673 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2674 | sizeof *vec); | |
61d54cd5 | 2675 | *vec_ptr = vec; |
0065d054 | 2676 | len = *len_ptr; |
61d54cd5 RS |
2677 | } |
2678 | else | |
2679 | inhibit_storing = 1; | |
2eec3b4e | 2680 | } |
61d54cd5 RS |
2681 | |
2682 | if (!inhibit_storing) | |
2683 | vec[idx] = overlay; | |
2684 | idx++; | |
413e06a4 RS |
2685 | |
2686 | if (startpos < pos && startpos > prev) | |
2687 | prev = startpos; | |
2eec3b4e | 2688 | } |
239c932b RS |
2689 | else if (endpos < pos && endpos > prev) |
2690 | prev = endpos; | |
1d5f4c1d MB |
2691 | else if (endpos == pos && startpos > prev |
2692 | && (!change_req || startpos < pos)) | |
413e06a4 | 2693 | prev = startpos; |
1ab256cb RM |
2694 | } |
2695 | ||
239c932b RS |
2696 | if (next_ptr) |
2697 | *next_ptr = next; | |
2698 | if (prev_ptr) | |
2699 | *prev_ptr = prev; | |
2eec3b4e RS |
2700 | return idx; |
2701 | } | |
74514898 | 2702 | \f |
7723e095 MR |
2703 | /* Find all the overlays in the current buffer that overlap the range |
2704 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2705 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2706 | |
177c0ea7 | 2707 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2708 | Store in *LEN_PTR the size allocated for the vector. |
2709 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2710 | or ZV if there are no more overlays. | |
2711 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2712 | or BEGV if there are no previous overlays. | |
2713 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2714 | ||
2715 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2716 | when this function is called. | |
2717 | ||
2718 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2719 | If EXTEND is zero, we never extend the vector, | |
2720 | and we store only as many overlays as will fit. | |
2721 | But we still return the total number of overlays. */ | |
2722 | ||
21514da7 | 2723 | static ptrdiff_t |
145582a0 | 2724 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2725 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2726 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2727 | { |
2410d73a SM |
2728 | Lisp_Object overlay, ostart, oend; |
2729 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2730 | ptrdiff_t idx = 0; |
2731 | ptrdiff_t len = *len_ptr; | |
74514898 | 2732 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2733 | ptrdiff_t next = ZV; |
2734 | ptrdiff_t prev = BEGV; | |
74514898 | 2735 | int inhibit_storing = 0; |
7723e095 | 2736 | int end_is_Z = end == Z; |
74514898 | 2737 | |
2410d73a | 2738 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2739 | { |
d311d28c | 2740 | ptrdiff_t startpos, endpos; |
74514898 | 2741 | |
2410d73a | 2742 | XSETMISC (overlay, tail); |
74514898 RS |
2743 | |
2744 | ostart = OVERLAY_START (overlay); | |
2745 | oend = OVERLAY_END (overlay); | |
2746 | endpos = OVERLAY_POSITION (oend); | |
2747 | if (endpos < beg) | |
2748 | { | |
2749 | if (prev < endpos) | |
2750 | prev = endpos; | |
2751 | break; | |
2752 | } | |
2753 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2754 | /* Count an interval if it overlaps the range, is empty at the |
2755 | start of the range, or is empty at END provided END denotes the | |
2756 | end of the buffer. */ | |
74514898 | 2757 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2758 | || (startpos == endpos |
2759 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2760 | { |
2761 | if (idx == len) | |
2762 | { | |
2763 | /* The supplied vector is full. | |
2764 | Either make it bigger, or don't store any more in it. */ | |
2765 | if (extend) | |
2766 | { | |
0065d054 PE |
2767 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2768 | sizeof *vec); | |
74514898 | 2769 | *vec_ptr = vec; |
0065d054 | 2770 | len = *len_ptr; |
74514898 RS |
2771 | } |
2772 | else | |
2773 | inhibit_storing = 1; | |
2774 | } | |
2775 | ||
2776 | if (!inhibit_storing) | |
2777 | vec[idx] = overlay; | |
2778 | /* Keep counting overlays even if we can't return them all. */ | |
2779 | idx++; | |
2780 | } | |
2781 | else if (startpos < next) | |
2782 | next = startpos; | |
2783 | } | |
2784 | ||
2410d73a | 2785 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2786 | { |
d311d28c | 2787 | ptrdiff_t startpos, endpos; |
74514898 | 2788 | |
2410d73a | 2789 | XSETMISC (overlay, tail); |
74514898 RS |
2790 | |
2791 | ostart = OVERLAY_START (overlay); | |
2792 | oend = OVERLAY_END (overlay); | |
2793 | startpos = OVERLAY_POSITION (ostart); | |
2794 | if (end < startpos) | |
2795 | { | |
2796 | if (startpos < next) | |
2797 | next = startpos; | |
2798 | break; | |
2799 | } | |
2800 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2801 | /* Count an interval if it overlaps the range, is empty at the |
2802 | start of the range, or is empty at END provided END denotes the | |
2803 | end of the buffer. */ | |
74514898 | 2804 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2805 | || (startpos == endpos |
2806 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2807 | { |
2808 | if (idx == len) | |
2809 | { | |
2810 | if (extend) | |
2811 | { | |
0065d054 PE |
2812 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2813 | sizeof *vec); | |
74514898 | 2814 | *vec_ptr = vec; |
0065d054 | 2815 | len = *len_ptr; |
74514898 RS |
2816 | } |
2817 | else | |
2818 | inhibit_storing = 1; | |
2819 | } | |
2820 | ||
2821 | if (!inhibit_storing) | |
2822 | vec[idx] = overlay; | |
2823 | idx++; | |
2824 | } | |
2825 | else if (endpos < beg && endpos > prev) | |
2826 | prev = endpos; | |
2827 | } | |
fc04fa47 | 2828 | |
74514898 RS |
2829 | if (next_ptr) |
2830 | *next_ptr = next; | |
2831 | if (prev_ptr) | |
2832 | *prev_ptr = prev; | |
2833 | return idx; | |
2834 | } | |
09a22085 GM |
2835 | |
2836 | ||
2837 | /* Return non-zero if there exists an overlay with a non-nil | |
2838 | `mouse-face' property overlapping OVERLAY. */ | |
2839 | ||
2840 | int | |
d3da34e0 | 2841 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2842 | { |
d311d28c PE |
2843 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2844 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2845 | ptrdiff_t n, i, size; |
09a22085 | 2846 | Lisp_Object *v, tem; |
177c0ea7 | 2847 | |
bfd8410f | 2848 | size = 10; |
38182d90 | 2849 | v = alloca (size * sizeof *v); |
bfd8410f GM |
2850 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
2851 | if (n > size) | |
09a22085 | 2852 | { |
38182d90 | 2853 | v = alloca (n * sizeof *v); |
09a22085 GM |
2854 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
2855 | } | |
2856 | ||
2857 | for (i = 0; i < n; ++i) | |
2858 | if (!EQ (v[i], overlay) | |
2859 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2860 | !NILP (tem))) | |
2861 | break; | |
2862 | ||
2863 | return i < n; | |
2864 | } | |
2865 | ||
2866 | ||
74514898 | 2867 | \f |
fc04fa47 KH |
2868 | /* Fast function to just test if we're at an overlay boundary. */ |
2869 | int | |
d311d28c | 2870 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 2871 | { |
2410d73a SM |
2872 | Lisp_Object overlay; |
2873 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2874 | |
2410d73a | 2875 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2876 | { |
d311d28c | 2877 | ptrdiff_t endpos; |
fc04fa47 | 2878 | |
2410d73a | 2879 | XSETMISC (overlay ,tail); |
22657b40 | 2880 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2881 | |
2882 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2883 | if (endpos < pos) | |
2884 | break; | |
2885 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2886 | return 1; | |
2887 | } | |
2888 | ||
2410d73a | 2889 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2890 | { |
d311d28c | 2891 | ptrdiff_t startpos; |
fc04fa47 | 2892 | |
2410d73a | 2893 | XSETMISC (overlay, tail); |
22657b40 | 2894 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2895 | |
2896 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2897 | if (pos < startpos) | |
2898 | break; | |
2899 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2900 | return 1; | |
2901 | } | |
2902 | return 0; | |
2903 | } | |
2eec3b4e | 2904 | \f |
5985d248 KH |
2905 | struct sortvec |
2906 | { | |
2907 | Lisp_Object overlay; | |
d311d28c | 2908 | ptrdiff_t beg, end; |
fadf4e30 | 2909 | EMACS_INT priority; |
5985d248 KH |
2910 | }; |
2911 | ||
2912 | static int | |
d3da34e0 | 2913 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2914 | { |
dfcf069d AS |
2915 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2916 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2917 | if (s1->priority != s2->priority) |
c20998a7 | 2918 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2919 | if (s1->beg != s2->beg) |
c20998a7 | 2920 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2921 | if (s1->end != s2->end) |
c20998a7 | 2922 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
2923 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
2924 | between "equal" overlays. The result can still change between | |
2925 | invocations of Emacs, but it won't change in the middle of | |
2926 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
2927 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
2928 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
2929 | return 0; |
2930 | } | |
2931 | ||
2932 | /* Sort an array of overlays by priority. The array is modified in place. | |
2933 | The return value is the new size; this may be smaller than the original | |
2934 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2935 | ptrdiff_t |
2936 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2937 | { |
b081724f | 2938 | ptrdiff_t i, j; |
38182d90 | 2939 | struct sortvec *sortvec = alloca (noverlays * sizeof *sortvec); |
5985d248 KH |
2940 | |
2941 | /* Put the valid and relevant overlays into sortvec. */ | |
2942 | ||
2943 | for (i = 0, j = 0; i < noverlays; i++) | |
2944 | { | |
0fa767e7 | 2945 | Lisp_Object tem; |
c99fc30f | 2946 | Lisp_Object overlay; |
5985d248 | 2947 | |
c99fc30f | 2948 | overlay = overlay_vec[i]; |
22657b40 | 2949 | if (OVERLAYP (overlay) |
5985d248 KH |
2950 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
2951 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2952 | { | |
0fa767e7 KH |
2953 | /* If we're interested in a specific window, then ignore |
2954 | overlays that are limited to some other window. */ | |
2955 | if (w) | |
5985d248 | 2956 | { |
28545e04 | 2957 | Lisp_Object window; |
0fa767e7 KH |
2958 | |
2959 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2960 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2961 | continue; |
5985d248 | 2962 | } |
0fa767e7 KH |
2963 | |
2964 | /* This overlay is good and counts: put it into sortvec. */ | |
2965 | sortvec[j].overlay = overlay; | |
2966 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2967 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2968 | tem = Foverlay_get (overlay, Qpriority); | |
2969 | if (INTEGERP (tem)) | |
2970 | sortvec[j].priority = XINT (tem); | |
2971 | else | |
2972 | sortvec[j].priority = 0; | |
2973 | j++; | |
5985d248 KH |
2974 | } |
2975 | } | |
2976 | noverlays = j; | |
2977 | ||
2978 | /* Sort the overlays into the proper order: increasing priority. */ | |
2979 | ||
2980 | if (noverlays > 1) | |
2981 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2982 | ||
2983 | for (i = 0; i < noverlays; i++) | |
2984 | overlay_vec[i] = sortvec[i].overlay; | |
2985 | return (noverlays); | |
2986 | } | |
2987 | \f | |
bbbe9545 KH |
2988 | struct sortstr |
2989 | { | |
cb26008f | 2990 | Lisp_Object string, string2; |
93cb6be3 | 2991 | ptrdiff_t size; |
8961a454 | 2992 | EMACS_INT priority; |
bbbe9545 KH |
2993 | }; |
2994 | ||
e8185fa8 KH |
2995 | struct sortstrlist |
2996 | { | |
2997 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
2998 | ptrdiff_t size; /* Allocated length of that array. */ |
2999 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3000 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3001 | }; |
3002 | ||
3003 | /* Buffers for storing information about the overlays touching a given | |
3004 | position. These could be automatic variables in overlay_strings, but | |
3005 | it's more efficient to hold onto the memory instead of repeatedly | |
3006 | allocating and freeing it. */ | |
3007 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3008 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3009 | |
3010 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3011 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3012 | |
bbbe9545 KH |
3013 | /* A comparison function suitable for passing to qsort. */ |
3014 | static int | |
d3da34e0 | 3015 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3016 | { |
3017 | struct sortstr *s1 = (struct sortstr *)as1; | |
3018 | struct sortstr *s2 = (struct sortstr *)as2; | |
3019 | if (s1->size != s2->size) | |
c20998a7 | 3020 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3021 | if (s1->priority != s2->priority) |
c20998a7 | 3022 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3023 | return 0; |
3024 | } | |
3025 | ||
e8185fa8 | 3026 | static void |
93cb6be3 PE |
3027 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3028 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3029 | { |
d311d28c | 3030 | ptrdiff_t nbytes; |
43d27a72 | 3031 | |
e8185fa8 | 3032 | if (ssl->used == ssl->size) |
0065d054 | 3033 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3034 | ssl->buf[ssl->used].string = str; |
cb26008f | 3035 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3036 | ssl->buf[ssl->used].size = size; |
3037 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3038 | ssl->used++; | |
43d27a72 | 3039 | |
4b4deea2 | 3040 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3041 | nbytes = SCHARS (str); |
43d27a72 | 3042 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3043 | nbytes = count_size_as_multibyte (SDATA (str), |
3044 | SBYTES (str)); | |
43d27a72 | 3045 | else |
d5db4077 | 3046 | nbytes = SBYTES (str); |
43d27a72 | 3047 | |
0065d054 PE |
3048 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3049 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3050 | ssl->bytes += nbytes; |
3051 | ||
cb26008f | 3052 | if (STRINGP (str2)) |
43d27a72 | 3053 | { |
4b4deea2 | 3054 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3055 | nbytes = SCHARS (str2); |
43d27a72 | 3056 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3057 | nbytes = count_size_as_multibyte (SDATA (str2), |
3058 | SBYTES (str2)); | |
43d27a72 | 3059 | else |
d5db4077 | 3060 | nbytes = SBYTES (str2); |
43d27a72 | 3061 | |
0065d054 PE |
3062 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3063 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3064 | ssl->bytes += nbytes; |
3065 | } | |
e8185fa8 | 3066 | } |
bbbe9545 KH |
3067 | |
3068 | /* Return the concatenation of the strings associated with overlays that | |
3069 | begin or end at POS, ignoring overlays that are specific to a window | |
3070 | other than W. The strings are concatenated in the appropriate order: | |
3071 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3072 | lower. Normally all of the after-strings come first, but zero-sized |
3073 | overlays have their after-strings ride along with the before-strings | |
3074 | because it would look strange to print them inside-out. | |
3075 | ||
3076 | Returns the string length, and stores the contents indirectly through | |
3077 | PSTR, if that variable is non-null. The string may be overwritten by | |
3078 | subsequent calls. */ | |
6b5d3b89 | 3079 | |
d311d28c PE |
3080 | ptrdiff_t |
3081 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3082 | { |
28545e04 | 3083 | Lisp_Object overlay, window, str; |
2410d73a | 3084 | struct Lisp_Overlay *ov; |
d311d28c | 3085 | ptrdiff_t startpos, endpos; |
4b4deea2 | 3086 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3087 | |
e8185fa8 KH |
3088 | overlay_heads.used = overlay_heads.bytes = 0; |
3089 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3090 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3091 | { |
2410d73a | 3092 | XSETMISC (overlay, ov); |
c2d5b10f | 3093 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3094 | |
3095 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3096 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3097 | if (endpos < pos) | |
3098 | break; | |
3099 | if (endpos != pos && startpos != pos) | |
3100 | continue; | |
3101 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3102 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3103 | continue; |
e8185fa8 KH |
3104 | if (startpos == pos |
3105 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3106 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3107 | (startpos == endpos |
3108 | ? Foverlay_get (overlay, Qafter_string) | |
3109 | : Qnil), | |
3110 | Foverlay_get (overlay, Qpriority), | |
3111 | endpos - startpos); | |
3112 | else if (endpos == pos | |
3113 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3114 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3115 | Foverlay_get (overlay, Qpriority), |
3116 | endpos - startpos); | |
bbbe9545 | 3117 | } |
2410d73a | 3118 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3119 | { |
2410d73a SM |
3120 | XSETMISC (overlay, ov); |
3121 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3122 | |
3123 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3124 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3125 | if (startpos > pos) | |
3126 | break; | |
e8185fa8 KH |
3127 | if (endpos != pos && startpos != pos) |
3128 | continue; | |
3129 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3130 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3131 | continue; |
e8185fa8 KH |
3132 | if (startpos == pos |
3133 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3134 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3135 | (startpos == endpos |
3136 | ? Foverlay_get (overlay, Qafter_string) | |
3137 | : Qnil), | |
3138 | Foverlay_get (overlay, Qpriority), | |
3139 | endpos - startpos); | |
3140 | else if (endpos == pos | |
3141 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3142 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3143 | Foverlay_get (overlay, Qpriority), |
3144 | endpos - startpos); | |
bbbe9545 | 3145 | } |
e8185fa8 KH |
3146 | if (overlay_tails.used > 1) |
3147 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3148 | cmp_for_strings); | |
3149 | if (overlay_heads.used > 1) | |
3150 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3151 | cmp_for_strings); | |
3152 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3153 | { |
e8185fa8 | 3154 | Lisp_Object tem; |
d311d28c | 3155 | ptrdiff_t i; |
9f4d7cde | 3156 | unsigned char *p; |
0065d054 | 3157 | ptrdiff_t total; |
bbbe9545 | 3158 | |
0065d054 PE |
3159 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3160 | memory_full (SIZE_MAX); | |
3161 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3162 | if (total > overlay_str_len) |
0065d054 PE |
3163 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3164 | total - overlay_str_len, -1, 1); | |
3165 | ||
bbbe9545 | 3166 | p = overlay_str_buf; |
e8185fa8 | 3167 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3168 | { |
d311d28c | 3169 | ptrdiff_t nbytes; |
e8185fa8 | 3170 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3171 | nbytes = copy_text (SDATA (tem), p, |
3172 | SBYTES (tem), | |
43d27a72 RS |
3173 | STRING_MULTIBYTE (tem), multibyte); |
3174 | p += nbytes; | |
bbbe9545 | 3175 | } |
e8185fa8 | 3176 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3177 | { |
d311d28c | 3178 | ptrdiff_t nbytes; |
e8185fa8 | 3179 | tem = overlay_heads.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; | |
cb26008f KH |
3184 | tem = overlay_heads.buf[i].string2; |
3185 | if (STRINGP (tem)) | |
3186 | { | |
d5db4077 KR |
3187 | nbytes = copy_text (SDATA (tem), p, |
3188 | SBYTES (tem), | |
43d27a72 RS |
3189 | STRING_MULTIBYTE (tem), multibyte); |
3190 | p += nbytes; | |
cb26008f | 3191 | } |
bbbe9545 | 3192 | } |
cb26008f KH |
3193 | if (p != overlay_str_buf + total) |
3194 | abort (); | |
bbbe9545 KH |
3195 | if (pstr) |
3196 | *pstr = overlay_str_buf; | |
e8185fa8 | 3197 | return total; |
bbbe9545 | 3198 | } |
e8185fa8 | 3199 | return 0; |
bbbe9545 KH |
3200 | } |
3201 | \f | |
5c4f68f1 | 3202 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3203 | |
2eec3b4e | 3204 | void |
d311d28c | 3205 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3206 | { |
2410d73a SM |
3207 | Lisp_Object overlay, beg, end; |
3208 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3209 | |
3210 | /* See if anything in overlays_before should move to overlays_after. */ | |
3211 | ||
3212 | /* We don't strictly need prev in this loop; it should always be nil. | |
3213 | But we use it for symmetry and in case that should cease to be true | |
3214 | with some future change. */ | |
2410d73a SM |
3215 | prev = NULL; |
3216 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3217 | { |
2410d73a SM |
3218 | next = tail->next; |
3219 | XSETMISC (overlay, tail); | |
22657b40 | 3220 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3221 | |
2eec3b4e RS |
3222 | beg = OVERLAY_START (overlay); |
3223 | end = OVERLAY_END (overlay); | |
1ab256cb | 3224 | |
2eec3b4e | 3225 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3226 | { |
2eec3b4e | 3227 | /* OVERLAY needs to be moved. */ |
d311d28c | 3228 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3229 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3230 | |
3231 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3232 | if (prev) |
3233 | prev->next = next; | |
2eec3b4e | 3234 | else |
5c4f68f1 | 3235 | buf->overlays_before = next; |
2eec3b4e RS |
3236 | |
3237 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3238 | other_prev = NULL; |
3239 | for (other = buf->overlays_after; other; | |
3240 | other_prev = other, other = other->next) | |
1ab256cb | 3241 | { |
6af718a4 | 3242 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3243 | |
2410d73a | 3244 | XSETMISC (otheroverlay, other); |
22657b40 | 3245 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3246 | |
3247 | otherbeg = OVERLAY_START (otheroverlay); | |
3248 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3249 | break; | |
1ab256cb | 3250 | } |
2eec3b4e RS |
3251 | |
3252 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3253 | tail->next = other; |
3254 | if (other_prev) | |
3255 | other_prev->next = tail; | |
1ab256cb | 3256 | else |
5c4f68f1 | 3257 | buf->overlays_after = tail; |
2eec3b4e | 3258 | tail = prev; |
1ab256cb | 3259 | } |
2eec3b4e RS |
3260 | else |
3261 | /* We've reached the things that should stay in overlays_before. | |
3262 | All the rest of overlays_before must end even earlier, | |
3263 | so stop now. */ | |
3264 | break; | |
3265 | } | |
3266 | ||
3267 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3268 | prev = NULL; |
3269 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3270 | { |
2410d73a SM |
3271 | next = tail->next; |
3272 | XSETMISC (overlay, tail); | |
22657b40 | 3273 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3274 | |
3275 | beg = OVERLAY_START (overlay); | |
3276 | end = OVERLAY_END (overlay); | |
3277 | ||
3278 | /* Stop looking, when we know that nothing further | |
3279 | can possibly end before POS. */ | |
3280 | if (OVERLAY_POSITION (beg) > pos) | |
3281 | break; | |
3282 | ||
3283 | if (OVERLAY_POSITION (end) <= pos) | |
3284 | { | |
3285 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3286 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3287 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3288 | |
3289 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3290 | if (prev) |
3291 | prev->next = next; | |
2eec3b4e | 3292 | else |
5c4f68f1 | 3293 | buf->overlays_after = next; |
2eec3b4e RS |
3294 | |
3295 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3296 | other_prev = NULL; |
3297 | for (other = buf->overlays_before; other; | |
3298 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3299 | { |
3300 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3301 | |
2410d73a | 3302 | XSETMISC (otheroverlay, other); |
22657b40 | 3303 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3304 | |
3305 | otherend = OVERLAY_END (otheroverlay); | |
3306 | if (OVERLAY_POSITION (otherend) <= where) | |
3307 | break; | |
3308 | } | |
3309 | ||
3310 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3311 | tail->next = other; |
3312 | if (other_prev) | |
3313 | other_prev->next = tail; | |
2eec3b4e | 3314 | else |
5c4f68f1 | 3315 | buf->overlays_before = tail; |
2eec3b4e RS |
3316 | tail = prev; |
3317 | } | |
3318 | } | |
3319 | ||
c2d5b10f | 3320 | buf->overlay_center = pos; |
2eec3b4e | 3321 | } |
2b1bdf65 | 3322 | |
423cdb46 | 3323 | void |
d311d28c | 3324 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3325 | { |
3326 | /* After an insertion, the lists are still sorted properly, | |
3327 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3328 | if (current_buffer->overlay_center >= pos) |
3329 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3330 | } |
3331 | ||
3332 | void | |
d311d28c | 3333 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3334 | { |
c2d5b10f | 3335 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3336 | /* The deletion was to our right. No change needed; the before- and |
3337 | after-lists are still consistent. */ | |
3338 | ; | |
d311d28c | 3339 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3340 | /* The deletion was to our left. We need to adjust the center value |
3341 | to account for the change in position, but the lists are consistent | |
3342 | given the new value. */ | |
c2d5b10f | 3343 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3344 | else |
3345 | /* We're right in the middle. There might be things on the after-list | |
3346 | that now belong on the before-list. Recentering will move them, | |
3347 | and also update the center point. */ | |
3348 | recenter_overlay_lists (current_buffer, pos); | |
3349 | } | |
3350 | ||
2b1bdf65 KH |
3351 | /* Fix up overlays that were garbled as a result of permuting markers |
3352 | in the range START through END. Any overlay with at least one | |
3353 | endpoint in this range will need to be unlinked from the overlay | |
3354 | list and reinserted in its proper place. | |
3355 | Such an overlay might even have negative size at this point. | |
6b61353c | 3356 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3357 | void |
d311d28c | 3358 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3359 | { |
6af718a4 | 3360 | Lisp_Object overlay; |
5df8f01b PE |
3361 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3362 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3363 | /* These are either nil, indicating that before_list or after_list |
3364 | should be assigned, or the cons cell the cdr of which should be | |
3365 | assigned. */ | |
2410d73a | 3366 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3367 | /* 'Parent', likewise, indicates a cons cell or |
3368 | current_buffer->overlays_before or overlays_after, depending | |
3369 | which loop we're in. */ | |
2410d73a | 3370 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3371 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3372 | |
3373 | /* This algorithm shifts links around instead of consing and GCing. | |
3374 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3375 | well-formed list except that its last element, the CDR of beforep |
3376 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3377 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3378 | that before_list isn't initialized, although it may look | |
3379 | strange. */ | |
2410d73a | 3380 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3381 | { |
2410d73a | 3382 | XSETMISC (overlay, tail); |
6b61353c | 3383 | |
2b1bdf65 | 3384 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3385 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3386 | ||
3387 | /* If the overlay is backwards, make it empty. */ | |
3388 | if (endpos < startpos) | |
3389 | { | |
3390 | startpos = endpos; | |
3391 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3392 | Qnil); | |
3393 | } | |
3394 | ||
2b1bdf65 KH |
3395 | if (endpos < start) |
3396 | break; | |
60ebfdf3 | 3397 | |
2b1bdf65 KH |
3398 | if (endpos < end |
3399 | || (startpos >= start && startpos < end)) | |
3400 | { | |
2b1bdf65 KH |
3401 | /* Add it to the end of the wrong list. Later on, |
3402 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3403 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3404 | { |
2410d73a | 3405 | if (!afterp) |
1138e742 KR |
3406 | after_list = tail; |
3407 | else | |
2410d73a | 3408 | afterp->next = tail; |
1138e742 | 3409 | afterp = tail; |
2b1bdf65 KH |
3410 | } |
3411 | else | |
3412 | { | |
2410d73a | 3413 | if (!beforep) |
1138e742 KR |
3414 | before_list = tail; |
3415 | else | |
2410d73a | 3416 | beforep->next = tail; |
1138e742 | 3417 | beforep = tail; |
2b1bdf65 | 3418 | } |
2410d73a SM |
3419 | if (!parent) |
3420 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3421 | else |
2410d73a SM |
3422 | parent->next = tail->next; |
3423 | tail = tail->next; | |
2b1bdf65 KH |
3424 | } |
3425 | else | |
2410d73a | 3426 | parent = tail, tail = parent->next; |
2b1bdf65 | 3427 | } |
2410d73a | 3428 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3429 | { |
2410d73a | 3430 | XSETMISC (overlay, tail); |
6b61353c | 3431 | |
2b1bdf65 | 3432 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3433 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3434 | ||
3435 | /* If the overlay is backwards, make it empty. */ | |
3436 | if (endpos < startpos) | |
3437 | { | |
3438 | startpos = endpos; | |
3439 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3440 | Qnil); |
6b61353c KH |
3441 | } |
3442 | ||
2b1bdf65 KH |
3443 | if (startpos >= end) |
3444 | break; | |
6b61353c | 3445 | |
2b1bdf65 KH |
3446 | if (startpos >= start |
3447 | || (endpos >= start && endpos < end)) | |
3448 | { | |
c2d5b10f | 3449 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3450 | { |
2410d73a | 3451 | if (!afterp) |
1138e742 KR |
3452 | after_list = tail; |
3453 | else | |
2410d73a | 3454 | afterp->next = tail; |
1138e742 | 3455 | afterp = tail; |
2b1bdf65 KH |
3456 | } |
3457 | else | |
3458 | { | |
2410d73a | 3459 | if (!beforep) |
1138e742 KR |
3460 | before_list = tail; |
3461 | else | |
2410d73a | 3462 | beforep->next = tail; |
1138e742 | 3463 | beforep = tail; |
2b1bdf65 | 3464 | } |
2410d73a SM |
3465 | if (!parent) |
3466 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3467 | else |
2410d73a SM |
3468 | parent->next = tail->next; |
3469 | tail = tail->next; | |
2b1bdf65 KH |
3470 | } |
3471 | else | |
2410d73a | 3472 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3473 | } |
3474 | ||
3475 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3476 | and let the recenter function make it sane again. */ | |
2410d73a | 3477 | if (beforep) |
1138e742 | 3478 | { |
2410d73a | 3479 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3480 | current_buffer->overlays_before = before_list; |
3481 | } | |
c2d5b10f | 3482 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3483 | |
2410d73a | 3484 | if (afterp) |
1138e742 | 3485 | { |
2410d73a | 3486 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3487 | current_buffer->overlays_after = after_list; |
3488 | } | |
c2d5b10f | 3489 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3490 | } |
3b06f880 KH |
3491 | |
3492 | /* We have two types of overlay: the one whose ending marker is | |
3493 | after-insertion-marker (this is the usual case) and the one whose | |
3494 | ending marker is before-insertion-marker. When `overlays_before' | |
3495 | contains overlays of the latter type and the former type in this | |
3496 | order and both overlays end at inserting position, inserting a text | |
3497 | increases only the ending marker of the latter type, which results | |
3498 | in incorrect ordering of `overlays_before'. | |
3499 | ||
3500 | This function fixes ordering of overlays in the slot | |
3501 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3502 | was at PREV, and now is at POS. */ | |
3503 | ||
01136e9b | 3504 | void |
d311d28c | 3505 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3506 | { |
2410d73a SM |
3507 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3508 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3509 | Lisp_Object tem; | |
d311d28c | 3510 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3511 | |
3512 | /* After the insertion, the several overlays may be in incorrect | |
3513 | order. The possibility is that, in the list `overlays_before', | |
3514 | an overlay which ends at POS appears after an overlay which ends | |
3515 | at PREV. Since POS is greater than PREV, we must fix the | |
3516 | ordering of these overlays, by moving overlays ends at POS before | |
3517 | the overlays ends at PREV. */ | |
3518 | ||
3519 | /* At first, find a place where disordered overlays should be linked | |
3520 | in. It is where an overlay which end before POS exists. (i.e. an | |
3521 | overlay whose ending marker is after-insertion-marker if disorder | |
3522 | exists). */ | |
2410d73a SM |
3523 | while (tail |
3524 | && (XSETMISC (tem, tail), | |
3525 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3526 | { |
3527 | parent = tail; | |
2410d73a | 3528 | tail = tail->next; |
1138e742 | 3529 | } |
3b06f880 KH |
3530 | |
3531 | /* If we don't find such an overlay, | |
3532 | or the found one ends before PREV, | |
3533 | or the found one is the last one in the list, | |
3534 | we don't have to fix anything. */ | |
f93ad4cf | 3535 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3536 | return; |
3537 | ||
1138e742 KR |
3538 | right_pair = parent; |
3539 | parent = tail; | |
2410d73a | 3540 | tail = tail->next; |
3b06f880 | 3541 | |
1138e742 | 3542 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3543 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3544 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3545 | we found an overlay which ends before PREV, the remaining | |
3546 | overlays are in correct order. */ | |
2410d73a | 3547 | while (tail) |
3b06f880 | 3548 | { |
2410d73a SM |
3549 | XSETMISC (tem, tail); |
3550 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3551 | |
3552 | if (end == pos) | |
3553 | { /* This overlay is disordered. */ | |
2410d73a | 3554 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3555 | |
3556 | /* Unlink the found overlay. */ | |
2410d73a SM |
3557 | tail = found->next; |
3558 | parent->next = tail; | |
1138e742 KR |
3559 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3560 | and link it into the right place. */ | |
2410d73a | 3561 | if (!right_pair) |
1138e742 | 3562 | { |
2410d73a | 3563 | found->next = bp->overlays_before; |
1138e742 KR |
3564 | bp->overlays_before = found; |
3565 | } | |
3566 | else | |
3567 | { | |
2410d73a SM |
3568 | found->next = right_pair->next; |
3569 | right_pair->next = found; | |
1138e742 | 3570 | } |
3b06f880 KH |
3571 | } |
3572 | else if (end == prev) | |
1138e742 KR |
3573 | { |
3574 | parent = tail; | |
2410d73a | 3575 | tail = tail->next; |
1138e742 | 3576 | } |
3b06f880 KH |
3577 | else /* No more disordered overlay. */ |
3578 | break; | |
3579 | } | |
3580 | } | |
2eec3b4e | 3581 | \f |
52f8ec73 | 3582 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3583 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3584 | (Lisp_Object object) |
52f8ec73 JB |
3585 | { |
3586 | return (OVERLAYP (object) ? Qt : Qnil); | |
3587 | } | |
3588 | ||
acac2700 | 3589 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3590 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3591 | If omitted, BUFFER defaults to the current buffer. |
3592 | BEG and END may be integers or markers. | |
a625ee20 RS |
3593 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3594 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3595 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3596 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3597 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3598 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3599 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3600 | { |
3601 | Lisp_Object overlay; | |
5c4f68f1 | 3602 | struct buffer *b; |
2eec3b4e | 3603 | |
5c4f68f1 | 3604 | if (NILP (buffer)) |
67180c6a | 3605 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3606 | else |
b7826503 | 3607 | CHECK_BUFFER (buffer); |
883047b9 JB |
3608 | if (MARKERP (beg) |
3609 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3610 | error ("Marker points into wrong buffer"); | |
3611 | if (MARKERP (end) | |
3612 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3613 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3614 | |
b7826503 PJ |
3615 | CHECK_NUMBER_COERCE_MARKER (beg); |
3616 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3617 | |
883047b9 | 3618 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3619 | { |
c99fc30f KH |
3620 | Lisp_Object temp; |
3621 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3622 | } |
883047b9 JB |
3623 | |
3624 | b = XBUFFER (buffer); | |
3625 | ||
3626 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3627 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3628 | |
acac2700 RS |
3629 | if (!NILP (front_advance)) |
3630 | XMARKER (beg)->insertion_type = 1; | |
3631 | if (!NILP (rear_advance)) | |
3632 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3633 | |
d7a7fda3 | 3634 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3635 | |
177c0ea7 | 3636 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3637 | end = OVERLAY_END (overlay); |
c2d5b10f | 3638 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3639 | { |
3640 | if (b->overlays_after) | |
3641 | XOVERLAY (overlay)->next = b->overlays_after; | |
3642 | b->overlays_after = XOVERLAY (overlay); | |
3643 | } | |
2eec3b4e | 3644 | else |
2410d73a SM |
3645 | { |
3646 | if (b->overlays_before) | |
3647 | XOVERLAY (overlay)->next = b->overlays_before; | |
3648 | b->overlays_before = XOVERLAY (overlay); | |
3649 | } | |
2eec3b4e RS |
3650 | |
3651 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3652 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3653 | |
b61982dd JB |
3654 | /* We don't need to redisplay the region covered by the overlay, because |
3655 | the overlay has no properties at the moment. */ | |
3656 | ||
2eec3b4e RS |
3657 | return overlay; |
3658 | } | |
876aa27c RS |
3659 | \f |
3660 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3661 | ||
3662 | static void | |
d311d28c | 3663 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3664 | { |
876aa27c RS |
3665 | if (start > end) |
3666 | { | |
d311d28c | 3667 | ptrdiff_t temp = start; |
26f545d7 GM |
3668 | start = end; |
3669 | end = temp; | |
876aa27c RS |
3670 | } |
3671 | ||
481b5054 | 3672 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3673 | |
876aa27c RS |
3674 | /* If this is a buffer not in the selected window, |
3675 | we must do other windows. */ | |
3a45383a | 3676 | if (buf != XBUFFER (WVAR (XWINDOW (selected_window), buffer))) |
876aa27c | 3677 | windows_or_buffers_changed = 1; |
876aa27c RS |
3678 | /* If multiple windows show this buffer, we must do other windows. */ |
3679 | else if (buffer_shared > 1) | |
3680 | windows_or_buffers_changed = 1; | |
18700091 KS |
3681 | /* If we modify an overlay at the end of the buffer, we cannot |
3682 | be sure that window end is still valid. */ | |
3683 | else if (end >= ZV && start <= ZV) | |
3684 | windows_or_buffers_changed = 1; | |
876aa27c | 3685 | |
d8b9150f | 3686 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3687 | } |
2eec3b4e | 3688 | |
7b7ae965 DA |
3689 | /* Remove OVERLAY from LIST. */ |
3690 | ||
2410d73a | 3691 | static struct Lisp_Overlay * |
d3da34e0 | 3692 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3693 | { |
7b7ae965 DA |
3694 | register struct Lisp_Overlay *tail, **prev = &list; |
3695 | ||
3696 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3697 | if (tail == overlay) | |
2410d73a | 3698 | { |
7b7ae965 | 3699 | *prev = overlay->next; |
2410d73a SM |
3700 | overlay->next = NULL; |
3701 | break; | |
3702 | } | |
3703 | return list; | |
3704 | } | |
3705 | ||
5c4f68f1 | 3706 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3707 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3708 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3709 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3710 | buffer. */) |
5842a27b | 3711 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3712 | { |
471fe23d | 3713 | struct buffer *b, *ob = 0; |
0a4469c9 | 3714 | Lisp_Object obuffer; |
d311d28c | 3715 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3716 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3717 | |
b7826503 | 3718 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3719 | if (NILP (buffer)) |
3720 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3721 | if (NILP (buffer)) |
67180c6a | 3722 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3723 | CHECK_BUFFER (buffer); |
883047b9 | 3724 | |
471fe23d TN |
3725 | if (NILP (Fbuffer_live_p (buffer))) |
3726 | error ("Attempt to move overlay to a dead buffer"); | |
3727 | ||
883047b9 JB |
3728 | if (MARKERP (beg) |
3729 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3730 | error ("Marker points into wrong buffer"); | |
3731 | if (MARKERP (end) | |
3732 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3733 | error ("Marker points into wrong buffer"); | |
3734 | ||
b7826503 PJ |
3735 | CHECK_NUMBER_COERCE_MARKER (beg); |
3736 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3737 | |
471fe23d | 3738 | if (XINT (beg) > XINT (end)) |
02481186 | 3739 | { |
471fe23d TN |
3740 | Lisp_Object temp; |
3741 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3742 | } |
3743 | ||
9d7608b7 KH |
3744 | specbind (Qinhibit_quit, Qt); |
3745 | ||
0a4469c9 | 3746 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3747 | b = XBUFFER (buffer); |
471fe23d TN |
3748 | |
3749 | if (!NILP (obuffer)) | |
3750 | { | |
3751 | ob = XBUFFER (obuffer); | |
3752 | ||
3753 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3754 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3755 | ||
3756 | ob->overlays_before = | |
3757 | unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3758 | ob->overlays_after = | |
3759 | unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3760 | eassert (XOVERLAY (overlay)->next == NULL); | |
3761 | } | |
3762 | ||
3763 | /* Set the overlay boundaries, which may clip them. */ | |
3764 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3765 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3766 | ||
3767 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3768 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3769 | |
c82ed728 | 3770 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3771 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3772 | { |
3773 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3774 | if (ob) |
3775 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3776 | |
3777 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3778 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3779 | } |
c82ed728 JB |
3780 | else |
3781 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3782 | { | |
79cce3f2 PE |
3783 | if (o_beg == n_beg) |
3784 | modify_overlay (b, o_end, n_end); | |
3785 | else if (o_end == n_end) | |
3786 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 3787 | else |
79cce3f2 | 3788 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 3789 | } |
b61982dd | 3790 | |
471fe23d TN |
3791 | /* Delete the overlay if it is empty after clipping and has the |
3792 | evaporate property. */ | |
3793 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
3794 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 3795 | |
471fe23d TN |
3796 | /* Put the overlay into the new buffer's overlay lists, first on the |
3797 | wrong list. */ | |
3798 | if (n_end < b->overlay_center) | |
2410d73a | 3799 | { |
8f924df7 KH |
3800 | XOVERLAY (overlay)->next = b->overlays_after; |
3801 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3802 | } |
2eec3b4e | 3803 | else |
2410d73a | 3804 | { |
8f924df7 KH |
3805 | XOVERLAY (overlay)->next = b->overlays_before; |
3806 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3807 | } |
2eec3b4e RS |
3808 | |
3809 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3810 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3811 | |
0a4469c9 | 3812 | return unbind_to (count, overlay); |
2eec3b4e RS |
3813 | } |
3814 | ||
3815 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3816 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3817 | (Lisp_Object overlay) |
2eec3b4e | 3818 | { |
0a4469c9 | 3819 | Lisp_Object buffer; |
5c4f68f1 | 3820 | struct buffer *b; |
d311d28c | 3821 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 3822 | |
b7826503 | 3823 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3824 | |
0a4469c9 RS |
3825 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3826 | if (NILP (buffer)) | |
3827 | return Qnil; | |
3828 | ||
3829 | b = XBUFFER (buffer); | |
0a4469c9 | 3830 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3831 | |
471fe23d TN |
3832 | b->overlays_before |
3833 | = unchain_overlay (b->overlays_before, XOVERLAY (overlay)); | |
3834 | b->overlays_after | |
3835 | = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
2410d73a | 3836 | eassert (XOVERLAY (overlay)->next == NULL); |
471fe23d | 3837 | |
041a49a6 | 3838 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 3839 | |
e58c389d | 3840 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3841 | display optimizations for the affected buffer, on the basis that |
3842 | these strings may contain newlines. This is easier to do than to | |
3843 | check for that situation during redisplay. */ | |
3844 | if (!windows_or_buffers_changed | |
3845 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3846 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3847 | b->prevent_redisplay_optimizations_p = 1; | |
3848 | ||
0a4469c9 | 3849 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3850 | } |
3851 | \f | |
8ebafa8d JB |
3852 | /* Overlay dissection functions. */ |
3853 | ||
a7ca3326 | 3854 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3855 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3856 | (Lisp_Object overlay) |
8ebafa8d | 3857 | { |
b7826503 | 3858 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3859 | |
3860 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3861 | } | |
3862 | ||
a7ca3326 | 3863 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3864 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3865 | (Lisp_Object overlay) |
8ebafa8d | 3866 | { |
b7826503 | 3867 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3868 | |
3869 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3870 | } | |
3871 | ||
3872 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3873 | doc: /* Return the buffer OVERLAY belongs to. |
3874 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3875 | (Lisp_Object overlay) |
8ebafa8d | 3876 | { |
b7826503 | 3877 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3878 | |
3879 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3880 | } | |
3881 | ||
3882 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3883 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3884 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3885 | OVERLAY. */) |
5842a27b | 3886 | (Lisp_Object overlay) |
8ebafa8d | 3887 | { |
b7826503 | 3888 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3889 | |
d8a05828 | 3890 | return Fcopy_sequence (MVAR (XOVERLAY (overlay), plist)); |
8ebafa8d JB |
3891 | } |
3892 | ||
3893 | \f | |
2eec3b4e | 3894 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3895 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3896 | (Lisp_Object pos) |
2eec3b4e | 3897 | { |
b081724f | 3898 | ptrdiff_t len, noverlays; |
2eec3b4e | 3899 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3900 | Lisp_Object result; |
3901 | ||
b7826503 | 3902 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3903 | |
3904 | len = 10; | |
a9800ae8 | 3905 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 3906 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3907 | |
3908 | /* Put all the overlays we want in a vector in overlay_vec. | |
3909 | Store the length in len. */ | |
2a77a7d7 | 3910 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3911 | 0, 0, 0); |
2eec3b4e RS |
3912 | |
3913 | /* Make a list of them all. */ | |
3914 | result = Flist (noverlays, overlay_vec); | |
3915 | ||
9ac0d9e0 | 3916 | xfree (overlay_vec); |
2eec3b4e RS |
3917 | return result; |
3918 | } | |
3919 | ||
74514898 | 3920 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3921 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3922 | Overlap means that at least one character is contained within the overlay |
3923 | and also contained within the specified region. | |
7723e095 MR |
3924 | Empty overlays are included in the result if they are located at BEG, |
3925 | between BEG and END, or at END provided END denotes the position at the | |
3926 | end of the buffer. */) | |
5842a27b | 3927 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3928 | { |
21514da7 | 3929 | ptrdiff_t len, noverlays; |
74514898 | 3930 | Lisp_Object *overlay_vec; |
74514898 RS |
3931 | Lisp_Object result; |
3932 | ||
b7826503 PJ |
3933 | CHECK_NUMBER_COERCE_MARKER (beg); |
3934 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3935 | |
3936 | len = 10; | |
38182d90 | 3937 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
3938 | |
3939 | /* Put all the overlays we want in a vector in overlay_vec. | |
3940 | Store the length in len. */ | |
3941 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3942 | NULL, NULL); |
74514898 RS |
3943 | |
3944 | /* Make a list of them all. */ | |
3945 | result = Flist (noverlays, overlay_vec); | |
3946 | ||
3947 | xfree (overlay_vec); | |
3948 | return result; | |
3949 | } | |
3950 | ||
a7ca3326 | 3951 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3952 | 1, 1, 0, |
7ee72033 | 3953 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3954 | If there are no overlay boundaries from POS to (point-max), |
3955 | the value is (point-max). */) | |
5842a27b | 3956 | (Lisp_Object pos) |
2eec3b4e | 3957 | { |
b081724f | 3958 | ptrdiff_t i, len, noverlays; |
d311d28c | 3959 | ptrdiff_t endpos; |
2eec3b4e | 3960 | Lisp_Object *overlay_vec; |
2eec3b4e | 3961 | |
b7826503 | 3962 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3963 | |
3964 | len = 10; | |
38182d90 | 3965 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3966 | |
3967 | /* Put all the overlays we want in a vector in overlay_vec. | |
3968 | Store the length in len. | |
3969 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3970 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3971 | &endpos, 0, 1); |
2eec3b4e RS |
3972 | |
3973 | /* If any of these overlays ends before endpos, | |
3974 | use its ending point instead. */ | |
3975 | for (i = 0; i < noverlays; i++) | |
3976 | { | |
3977 | Lisp_Object oend; | |
d311d28c | 3978 | ptrdiff_t oendpos; |
2eec3b4e RS |
3979 | |
3980 | oend = OVERLAY_END (overlay_vec[i]); | |
3981 | oendpos = OVERLAY_POSITION (oend); | |
3982 | if (oendpos < endpos) | |
3983 | endpos = oendpos; | |
1ab256cb RM |
3984 | } |
3985 | ||
9ac0d9e0 | 3986 | xfree (overlay_vec); |
2eec3b4e RS |
3987 | return make_number (endpos); |
3988 | } | |
239c932b | 3989 | |
a7ca3326 | 3990 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 3991 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 3992 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
3993 | If there are no overlay boundaries from (point-min) to POS, |
3994 | the value is (point-min). */) | |
5842a27b | 3995 | (Lisp_Object pos) |
239c932b | 3996 | { |
d311d28c | 3997 | ptrdiff_t prevpos; |
239c932b | 3998 | Lisp_Object *overlay_vec; |
b081724f | 3999 | ptrdiff_t len; |
239c932b | 4000 | |
b7826503 | 4001 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4002 | |
624bbdc4 RS |
4003 | /* At beginning of buffer, we know the answer; |
4004 | avoid bug subtracting 1 below. */ | |
4005 | if (XINT (pos) == BEGV) | |
4006 | return pos; | |
4007 | ||
017f0539 | 4008 | len = 10; |
38182d90 | 4009 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4010 | |
239c932b RS |
4011 | /* Put all the overlays we want in a vector in overlay_vec. |
4012 | Store the length in len. | |
daa1c109 | 4013 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4014 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4015 | 0, &prevpos, 1); |
239c932b | 4016 | |
239c932b RS |
4017 | xfree (overlay_vec); |
4018 | return make_number (prevpos); | |
4019 | } | |
2eec3b4e RS |
4020 | \f |
4021 | /* These functions are for debugging overlays. */ | |
4022 | ||
4023 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4024 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4025 | The car has all the overlays before the overlay center; |
4026 | the cdr has all the overlays after the overlay center. | |
4027 | Recentering overlays moves overlays between these lists. | |
4028 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4029 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4030 | (void) |
2eec3b4e | 4031 | { |
2410d73a SM |
4032 | struct Lisp_Overlay *ol; |
4033 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4034 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4035 | { | |
4036 | XSETMISC (tmp, ol); | |
4037 | before = Fcons (tmp, before); | |
4038 | } | |
4039 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4040 | { | |
4041 | XSETMISC (tmp, ol); | |
4042 | after = Fcons (tmp, after); | |
4043 | } | |
4044 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4045 | } |
4046 | ||
4047 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4048 | doc: /* Recenter the overlays of the current buffer around position POS. |
4049 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4050 | for positions far away from POS). */) | |
5842a27b | 4051 | (Lisp_Object pos) |
2eec3b4e | 4052 | { |
d311d28c | 4053 | ptrdiff_t p; |
b7826503 | 4054 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4055 | |
d311d28c PE |
4056 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4057 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4058 | return Qnil; |
4059 | } | |
4060 | \f | |
a7ca3326 | 4061 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4062 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4063 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4064 | { |
b7826503 | 4065 | CHECK_OVERLAY (overlay); |
d8a05828 | 4066 | return lookup_char_property (MVAR (XOVERLAY (overlay), plist), prop, 0); |
2eec3b4e RS |
4067 | } |
4068 | ||
4069 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4070 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4071 | VALUE will be returned.*/) | |
5842a27b | 4072 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4073 | { |
48e2e3ba | 4074 | Lisp_Object tail, buffer; |
9d7608b7 | 4075 | int changed; |
2eec3b4e | 4076 | |
b7826503 | 4077 | CHECK_OVERLAY (overlay); |
b61982dd | 4078 | |
274a9425 RS |
4079 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4080 | ||
d8a05828 | 4081 | for (tail = MVAR (XOVERLAY (overlay), plist); |
7539e11f KR |
4082 | CONSP (tail) && CONSP (XCDR (tail)); |
4083 | tail = XCDR (XCDR (tail))) | |
4084 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4085 | { |
7539e11f | 4086 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4087 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4088 | goto found; |
274a9425 | 4089 | } |
9d7608b7 KH |
4090 | /* It wasn't in the list, so add it to the front. */ |
4091 | changed = !NILP (value); | |
d8a05828 DA |
4092 | MVAR (XOVERLAY (overlay), plist) |
4093 | = Fcons (prop, Fcons (value, MVAR (XOVERLAY (overlay), plist))); | |
9d7608b7 KH |
4094 | found: |
4095 | if (! NILP (buffer)) | |
4096 | { | |
4097 | if (changed) | |
876aa27c | 4098 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4099 | marker_position (OVERLAY_START (overlay)), |
4100 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4101 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4102 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4103 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4104 | Fdelete_overlay (overlay); | |
4105 | } | |
7d63db98 | 4106 | |
2eec3b4e | 4107 | return value; |
1ab256cb RM |
4108 | } |
4109 | \f | |
9115729e KH |
4110 | /* Subroutine of report_overlay_modification. */ |
4111 | ||
4112 | /* Lisp vector holding overlay hook functions to call. | |
4113 | Vector elements come in pairs. | |
4114 | Each even-index element is a list of hook functions. | |
4115 | The following odd-index element is the overlay they came from. | |
4116 | ||
4117 | Before the buffer change, we fill in this vector | |
4118 | as we call overlay hook functions. | |
4119 | After the buffer change, we get the functions to call from this vector. | |
4120 | This way we always call the same functions before and after the change. */ | |
4121 | static Lisp_Object last_overlay_modification_hooks; | |
4122 | ||
4123 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4124 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4125 | |
4126 | /* Add one functionlist/overlay pair | |
4127 | to the end of last_overlay_modification_hooks. */ | |
4128 | ||
4129 | static void | |
d3da34e0 | 4130 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4131 | { |
d311d28c | 4132 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4133 | |
d311d28c PE |
4134 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4135 | last_overlay_modification_hooks = | |
4136 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4137 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4138 | functionlist); last_overlay_modification_hooks_used++; | |
4139 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4140 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4141 | } |
4142 | \f | |
173f2a64 RS |
4143 | /* Run the modification-hooks of overlays that include |
4144 | any part of the text in START to END. | |
9115729e KH |
4145 | If this change is an insertion, also |
4146 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4147 | and the insert-after-hooks of overlay ending at START. |
4148 | ||
4149 | This is called both before and after the modification. | |
4150 | AFTER is nonzero when we call after the modification. | |
4151 | ||
9115729e KH |
4152 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4153 | When AFTER is nonzero, they are the start position, | |
4154 | the position after the inserted new text, | |
4155 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4156 | |
4157 | void | |
d3da34e0 JB |
4158 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4159 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4160 | { |
2410d73a SM |
4161 | Lisp_Object prop, overlay; |
4162 | struct Lisp_Overlay *tail; | |
9115729e KH |
4163 | /* 1 if this change is an insertion. */ |
4164 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4165 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4166 | |
4167 | overlay = Qnil; | |
2410d73a | 4168 | tail = NULL; |
9115729e | 4169 | |
27c6b98e SM |
4170 | /* We used to run the functions as soon as we found them and only register |
4171 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4172 | case. But running elisp code as we traverse the list of overlays is | |
4173 | painful because the list can be modified by the elisp code so we had to | |
4174 | copy at several places. We now simply do a read-only traversal that | |
4175 | only collects the functions to run and we run them afterwards. It's | |
4176 | simpler, especially since all the code was already there. -stef */ | |
4177 | ||
a615c6dc | 4178 | if (!after) |
173f2a64 | 4179 | { |
a615c6dc SM |
4180 | /* We are being called before a change. |
4181 | Scan the overlays to find the functions to call. */ | |
4182 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4183 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4184 | { |
d311d28c | 4185 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4186 | Lisp_Object ostart, oend; |
4187 | ||
2410d73a | 4188 | XSETMISC (overlay, tail); |
a615c6dc SM |
4189 | |
4190 | ostart = OVERLAY_START (overlay); | |
4191 | oend = OVERLAY_END (overlay); | |
4192 | endpos = OVERLAY_POSITION (oend); | |
4193 | if (XFASTINT (start) > endpos) | |
4194 | break; | |
4195 | startpos = OVERLAY_POSITION (ostart); | |
4196 | if (insertion && (XFASTINT (start) == startpos | |
4197 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4198 | { |
a615c6dc SM |
4199 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4200 | if (!NILP (prop)) | |
4201 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4202 | } |
a615c6dc SM |
4203 | if (insertion && (XFASTINT (start) == endpos |
4204 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4205 | { |
a615c6dc SM |
4206 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4207 | if (!NILP (prop)) | |
4208 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4209 | } |
a615c6dc SM |
4210 | /* Test for intersecting intervals. This does the right thing |
4211 | for both insertion and deletion. */ | |
4212 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4213 | { |
a615c6dc SM |
4214 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4215 | if (!NILP (prop)) | |
4216 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4217 | } |
173f2a64 | 4218 | } |
60ebfdf3 | 4219 | |
2410d73a | 4220 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4221 | { |
d311d28c | 4222 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4223 | Lisp_Object ostart, oend; |
4224 | ||
2410d73a | 4225 | XSETMISC (overlay, tail); |
a615c6dc SM |
4226 | |
4227 | ostart = OVERLAY_START (overlay); | |
4228 | oend = OVERLAY_END (overlay); | |
4229 | startpos = OVERLAY_POSITION (ostart); | |
4230 | endpos = OVERLAY_POSITION (oend); | |
4231 | if (XFASTINT (end) < startpos) | |
4232 | break; | |
4233 | if (insertion && (XFASTINT (start) == startpos | |
4234 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4235 | { |
a615c6dc SM |
4236 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4237 | if (!NILP (prop)) | |
4238 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4239 | } |
a615c6dc SM |
4240 | if (insertion && (XFASTINT (start) == endpos |
4241 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4242 | { |
a615c6dc SM |
4243 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4244 | if (!NILP (prop)) | |
4245 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4246 | } |
a615c6dc SM |
4247 | /* Test for intersecting intervals. This does the right thing |
4248 | for both insertion and deletion. */ | |
4249 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4250 | { |
a615c6dc SM |
4251 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4252 | if (!NILP (prop)) | |
4253 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4254 | } |
173f2a64 RS |
4255 | } |
4256 | } | |
55b48893 | 4257 | |
a615c6dc SM |
4258 | GCPRO4 (overlay, arg1, arg2, arg3); |
4259 | { | |
4260 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4261 | First copy the vector contents, in case some of these hooks | |
4262 | do subsequent modification of the buffer. */ | |
d311d28c | 4263 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4264 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4265 | ptrdiff_t i; |
a615c6dc | 4266 | |
72af86bd AS |
4267 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4268 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4269 | gcpro1.var = copy; |
4270 | gcpro1.nvars = size; | |
4271 | ||
4272 | for (i = 0; i < size;) | |
4273 | { | |
8f54f30a PE |
4274 | Lisp_Object prop_i, overlay_i; |
4275 | prop_i = copy[i++]; | |
4276 | overlay_i = copy[i++]; | |
4277 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4278 | } |
4279 | } | |
55b48893 | 4280 | UNGCPRO; |
173f2a64 RS |
4281 | } |
4282 | ||
4283 | static void | |
d3da34e0 JB |
4284 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4285 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4286 | { |
930a9140 | 4287 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4288 | |
930a9140 | 4289 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4290 | |
6d70a280 | 4291 | while (CONSP (list)) |
173f2a64 | 4292 | { |
930a9140 | 4293 | if (NILP (arg3)) |
6d70a280 | 4294 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4295 | else |
6d70a280 SM |
4296 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4297 | list = XCDR (list); | |
173f2a64 RS |
4298 | } |
4299 | UNGCPRO; | |
4300 | } | |
9d7608b7 KH |
4301 | |
4302 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4303 | property is set. */ | |
4304 | void | |
d311d28c | 4305 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4306 | { |
2410d73a SM |
4307 | Lisp_Object overlay, hit_list; |
4308 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4309 | |
4310 | hit_list = Qnil; | |
c2d5b10f | 4311 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4312 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4313 | { |
d311d28c | 4314 | ptrdiff_t endpos; |
2410d73a | 4315 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4316 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4317 | if (endpos < pos) | |
4318 | break; | |
4319 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4320 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4321 | hit_list = Fcons (overlay, hit_list); |
4322 | } | |
4323 | else | |
2410d73a | 4324 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4325 | { |
d311d28c | 4326 | ptrdiff_t startpos; |
2410d73a | 4327 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4328 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4329 | if (startpos > pos) | |
4330 | break; | |
4331 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4332 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4333 | hit_list = Fcons (overlay, hit_list); |
4334 | } | |
7539e11f KR |
4335 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4336 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4337 | } |
173f2a64 | 4338 | \f |
54dfdeb0 | 4339 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4340 | in the slot with offset OFFSET. */ |
4341 | ||
0fa3ba92 | 4342 | void |
d3da34e0 | 4343 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4344 | { |
ad97b375 | 4345 | Lisp_Object predicate; |
177c0ea7 | 4346 | |
64e16c3c | 4347 | switch (type) |
0fa3ba92 | 4348 | { |
2de9f71c | 4349 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4350 | case Lisp_String: predicate = Qstringp; break; |
4351 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4352 | default: abort (); | |
0fa3ba92 JB |
4353 | } |
4354 | ||
ad97b375 | 4355 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4356 | } |
7c02e886 | 4357 | |
0fa3ba92 | 4358 | \f |
b86af064 GM |
4359 | /*********************************************************************** |
4360 | Allocation with mmap | |
4361 | ***********************************************************************/ | |
4362 | ||
4363 | #ifdef USE_MMAP_FOR_BUFFERS | |
4364 | ||
4365 | #include <sys/types.h> | |
4366 | #include <sys/mman.h> | |
4367 | ||
4368 | #ifndef MAP_ANON | |
4369 | #ifdef MAP_ANONYMOUS | |
4370 | #define MAP_ANON MAP_ANONYMOUS | |
4371 | #else | |
4372 | #define MAP_ANON 0 | |
4373 | #endif | |
4374 | #endif | |
4375 | ||
09dfdf85 GM |
4376 | #ifndef MAP_FAILED |
4377 | #define MAP_FAILED ((void *) -1) | |
4378 | #endif | |
4379 | ||
b86af064 | 4380 | #include <stdio.h> |
b86af064 GM |
4381 | |
4382 | #if MAP_ANON == 0 | |
4383 | #include <fcntl.h> | |
4384 | #endif | |
4385 | ||
4386 | #include "coding.h" | |
4387 | ||
4388 | ||
4389 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4390 | The current implementation lets the system select mapped | |
4391 | addresses; we're not using MAP_FIXED in general, except when | |
4392 | trying to enlarge regions. | |
4393 | ||
4394 | Each mapped region starts with a mmap_region structure, the user | |
4395 | area starts after that structure, aligned to MEM_ALIGN. | |
4396 | ||
4397 | +-----------------------+ | |
4398 | | struct mmap_info + | | |
4399 | | padding | | |
4400 | +-----------------------+ | |
4401 | | user data | | |
4402 | | | | |
4403 | | | | |
4404 | +-----------------------+ */ | |
4405 | ||
4406 | struct mmap_region | |
4407 | { | |
4408 | /* User-specified size. */ | |
4409 | size_t nbytes_specified; | |
177c0ea7 | 4410 | |
b86af064 GM |
4411 | /* Number of bytes mapped */ |
4412 | size_t nbytes_mapped; | |
4413 | ||
4414 | /* Pointer to the location holding the address of the memory | |
4415 | allocated with the mmap'd block. The variable actually points | |
4416 | after this structure. */ | |
261cb4bb | 4417 | void **var; |
b86af064 GM |
4418 | |
4419 | /* Next and previous in list of all mmap'd regions. */ | |
4420 | struct mmap_region *next, *prev; | |
4421 | }; | |
4422 | ||
4423 | /* Doubly-linked list of mmap'd regions. */ | |
4424 | ||
4425 | static struct mmap_region *mmap_regions; | |
4426 | ||
4427 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4428 | /dev/zero will be opened on it. */ | |
4429 | ||
4430 | static int mmap_fd; | |
4431 | ||
4432 | /* Temporary storage for mmap_set_vars, see there. */ | |
4433 | ||
4434 | static struct mmap_region *mmap_regions_1; | |
4435 | static int mmap_fd_1; | |
4436 | ||
4437 | /* Page size on this system. */ | |
4438 | ||
4439 | static int mmap_page_size; | |
4440 | ||
cd1181db | 4441 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4442 | |
4443 | static int mmap_initialized_p; | |
4444 | ||
4445 | /* Value is X rounded up to the next multiple of N. */ | |
4446 | ||
4447 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4448 | ||
4449 | /* Size of mmap_region structure plus padding. */ | |
4450 | ||
4451 | #define MMAP_REGION_STRUCT_SIZE \ | |
4452 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4453 | ||
4454 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4455 | region, return a pointer to the start of the region. */ | |
4456 | ||
4457 | #define MMAP_REGION(P) \ | |
4458 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4459 | ||
4460 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4461 | to the start of the user-visible part of the region. */ | |
4462 | ||
4463 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4464 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4465 | |
4466 | #define MEM_ALIGN sizeof (double) | |
4467 | ||
7273faa1 DL |
4468 | /* Predicate returning true if part of the address range [START .. END] |
4469 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4470 | memory mapping. |
4471 | ||
da6062e6 | 4472 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4473 | something else. This can be overridden by system configuration |
4474 | files if system-specific means to determine this exists. */ | |
4475 | ||
4476 | #ifndef MMAP_ALLOCATED_P | |
4477 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4478 | #endif | |
4479 | ||
53964682 | 4480 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4481 | |
1dae0f0a AS |
4482 | static void |
4483 | mmap_init (void) | |
4484 | { | |
4485 | #if MAP_ANON == 0 | |
4486 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4487 | in a dumped Emacs. */ | |
4488 | if (mmap_fd <= 0) | |
4489 | { | |
4490 | /* No anonymous mmap -- we need the file descriptor. */ | |
4491 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4492 | if (mmap_fd == -1) | |
4493 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4494 | } | |
4495 | #endif /* MAP_ANON == 0 */ | |
4496 | ||
4497 | if (mmap_initialized_p) | |
4498 | return; | |
4499 | mmap_initialized_p = 1; | |
b86af064 | 4500 | |
1dae0f0a AS |
4501 | #if MAP_ANON != 0 |
4502 | mmap_fd = -1; | |
4503 | #endif | |
4504 | ||
4505 | mmap_page_size = getpagesize (); | |
4506 | } | |
b86af064 GM |
4507 | |
4508 | /* Return a region overlapping address range START...END, or null if | |
4509 | none. END is not including, i.e. the last byte in the range | |
4510 | is at END - 1. */ | |
4511 | ||
4512 | static struct mmap_region * | |
261cb4bb | 4513 | mmap_find (void *start, void *end) |
b86af064 GM |
4514 | { |
4515 | struct mmap_region *r; | |
4516 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4517 | |
b86af064 GM |
4518 | for (r = mmap_regions; r; r = r->next) |
4519 | { | |
4520 | char *rstart = (char *) r; | |
4521 | char *rend = rstart + r->nbytes_mapped; | |
4522 | ||
4523 | if (/* First byte of range, i.e. START, in this region? */ | |
4524 | (s >= rstart && s < rend) | |
4525 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4526 | || (e > rstart && e <= rend) | |
4527 | /* First byte of this region in the range? */ | |
4528 | || (rstart >= s && rstart < e) | |
4529 | /* Last byte of this region in the range? */ | |
4530 | || (rend > s && rend <= e)) | |
4531 | break; | |
4532 | } | |
4533 | ||
4534 | return r; | |
4535 | } | |
4536 | ||
4537 | ||
4538 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4539 | the region. Value is non-zero if successful. */ | |
4540 | ||
4541 | static int | |
1dae0f0a | 4542 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4543 | { |
4544 | if (r->next) | |
4545 | r->next->prev = r->prev; | |
4546 | if (r->prev) | |
4547 | r->prev->next = r->next; | |
4548 | else | |
4549 | mmap_regions = r->next; | |
177c0ea7 | 4550 | |
261cb4bb | 4551 | if (munmap (r, r->nbytes_mapped) == -1) |
b86af064 GM |
4552 | { |
4553 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4554 | return 0; | |
4555 | } | |
4556 | ||
4557 | return 1; | |
4558 | } | |
4559 | ||
4560 | ||
4561 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4562 | Value is non-zero if successful. */ | |
4563 | ||
4564 | static int | |
1dae0f0a | 4565 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4566 | { |
4567 | char *region_end = (char *) r + r->nbytes_mapped; | |
4568 | size_t nbytes; | |
4569 | int success = 0; | |
4570 | ||
4571 | if (npages < 0) | |
4572 | { | |
4573 | /* Unmap pages at the end of the region. */ | |
4574 | nbytes = - npages * mmap_page_size; | |
4575 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4576 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4577 | else | |
4578 | { | |
4579 | r->nbytes_mapped -= nbytes; | |
4580 | success = 1; | |
4581 | } | |
4582 | } | |
4583 | else if (npages > 0) | |
4584 | { | |
b86af064 | 4585 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4586 | |
b86af064 GM |
4587 | /* Try to map additional pages at the end of the region. We |
4588 | cannot do this if the address range is already occupied by | |
4589 | something else because mmap deletes any previous mapping. | |
4590 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4591 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4592 | { |
261cb4bb | 4593 | void *p; |
177c0ea7 | 4594 | |
b86af064 GM |
4595 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4596 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4597 | if (p == MAP_FAILED) | |
edaa9aed | 4598 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4599 | else if (p != region_end) |
b86af064 GM |
4600 | { |
4601 | /* Kernels are free to choose a different address. In | |
4602 | that case, unmap what we've mapped above; we have | |
4603 | no use for it. */ | |
4604 | if (munmap (p, nbytes) == -1) | |
4605 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4606 | } | |
4607 | else | |
4608 | { | |
4609 | r->nbytes_mapped += nbytes; | |
4610 | success = 1; | |
4611 | } | |
4612 | } | |
4613 | } | |
4614 | ||
4615 | return success; | |
4616 | } | |
4617 | ||
4618 | ||
4619 | /* Set or reset variables holding references to mapped regions. If | |
4620 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4621 | non-zero, set all variables to the start of the user-areas | |
4622 | of mapped regions. | |
4623 | ||
4624 | This function is called from Fdump_emacs to ensure that the dumped | |
4625 | Emacs doesn't contain references to memory that won't be mapped | |
4626 | when Emacs starts. */ | |
4627 | ||
4628 | void | |
1dae0f0a | 4629 | mmap_set_vars (int restore_p) |
b86af064 GM |
4630 | { |
4631 | struct mmap_region *r; | |
4632 | ||
4633 | if (restore_p) | |
4634 | { | |
4635 | mmap_regions = mmap_regions_1; | |
4636 | mmap_fd = mmap_fd_1; | |
4637 | for (r = mmap_regions; r; r = r->next) | |
4638 | *r->var = MMAP_USER_AREA (r); | |
4639 | } | |
4640 | else | |
4641 | { | |
4642 | for (r = mmap_regions; r; r = r->next) | |
4643 | *r->var = NULL; | |
4644 | mmap_regions_1 = mmap_regions; | |
4645 | mmap_regions = NULL; | |
4646 | mmap_fd_1 = mmap_fd; | |
4647 | mmap_fd = -1; | |
4648 | } | |
4649 | } | |
4650 | ||
4651 | ||
4652 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4653 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4654 | address of some variable which will use the data area. | |
4655 | ||
4656 | The allocation of 0 bytes is valid. | |
4657 | ||
4658 | If we can't allocate the necessary memory, set *VAR to null, and | |
4659 | return null. */ | |
4660 | ||
261cb4bb PE |
4661 | static void * |
4662 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4663 | { |
4664 | void *p; | |
4665 | size_t map; | |
4666 | ||
4667 | mmap_init (); | |
4668 | ||
4669 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4670 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4671 | mmap_fd, 0); | |
177c0ea7 | 4672 | |
b86af064 GM |
4673 | if (p == MAP_FAILED) |
4674 | { | |
4675 | if (errno != ENOMEM) | |
4676 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4677 | p = NULL; | |
4678 | } | |
4679 | else | |
4680 | { | |
4681 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4682 | |
b86af064 GM |
4683 | r->nbytes_specified = nbytes; |
4684 | r->nbytes_mapped = map; | |
4685 | r->var = var; | |
4686 | r->prev = NULL; | |
4687 | r->next = mmap_regions; | |
4688 | if (r->next) | |
4689 | r->next->prev = r; | |
4690 | mmap_regions = r; | |
177c0ea7 | 4691 | |
b86af064 GM |
4692 | p = MMAP_USER_AREA (p); |
4693 | } | |
177c0ea7 | 4694 | |
b86af064 GM |
4695 | return *var = p; |
4696 | } | |
4697 | ||
4698 | ||
1dae0f0a AS |
4699 | /* Free a block of relocatable storage whose data is pointed to by |
4700 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4701 | ||
4702 | static void | |
261cb4bb | 4703 | mmap_free (void **var) |
1dae0f0a AS |
4704 | { |
4705 | mmap_init (); | |
4706 | ||
4707 | if (*var) | |
4708 | { | |
4709 | mmap_free_1 (MMAP_REGION (*var)); | |
4710 | *var = NULL; | |
4711 | } | |
4712 | } | |
4713 | ||
4714 | ||
b86af064 GM |
4715 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4716 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4717 | and return this value. If more memory cannot be allocated, then | |
4718 | leave *VAR unchanged, and return null. */ | |
4719 | ||
261cb4bb PE |
4720 | static void * |
4721 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4722 | { |
261cb4bb | 4723 | void *result; |
177c0ea7 | 4724 | |
b86af064 GM |
4725 | mmap_init (); |
4726 | ||
4727 | if (*var == NULL) | |
4728 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4729 | else if (nbytes == 0) |
b86af064 GM |
4730 | { |
4731 | mmap_free (var); | |
4732 | result = mmap_alloc (var, nbytes); | |
4733 | } | |
4734 | else | |
4735 | { | |
4736 | struct mmap_region *r = MMAP_REGION (*var); | |
4737 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4738 | |
b86af064 GM |
4739 | if (room < nbytes) |
4740 | { | |
4741 | /* Must enlarge. */ | |
261cb4bb | 4742 | void *old_ptr = *var; |
b86af064 GM |
4743 | |
4744 | /* Try to map additional pages at the end of the region. | |
4745 | If that fails, allocate a new region, copy data | |
4746 | from the old region, then free it. */ | |
4747 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4748 | / mmap_page_size))) | |
4749 | { | |
4750 | r->nbytes_specified = nbytes; | |
4751 | *var = result = old_ptr; | |
4752 | } | |
4753 | else if (mmap_alloc (var, nbytes)) | |
4754 | { | |
72af86bd | 4755 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4756 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4757 | result = *var; | |
4758 | r = MMAP_REGION (result); | |
4759 | r->nbytes_specified = nbytes; | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | *var = old_ptr; | |
4764 | result = NULL; | |
4765 | } | |
4766 | } | |
4767 | else if (room - nbytes >= mmap_page_size) | |
4768 | { | |
4769 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4770 | memory back to the system. |
4771 | ||
4772 | The extra parens are to make the division happens first, | |
4773 | on positive values, so we know it will round towards | |
4774 | zero. */ | |
bb63c5c9 | 4775 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4776 | result = *var; |
4777 | r->nbytes_specified = nbytes; | |
4778 | } | |
4779 | else | |
4780 | { | |
4781 | /* Leave it alone. */ | |
4782 | result = *var; | |
4783 | r->nbytes_specified = nbytes; | |
4784 | } | |
4785 | } | |
4786 | ||
4787 | return result; | |
4788 | } | |
4789 | ||
4790 | ||
b86af064 GM |
4791 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4792 | ||
4793 | ||
4794 | \f | |
4795 | /*********************************************************************** | |
4796 | Buffer-text Allocation | |
4797 | ***********************************************************************/ | |
4798 | ||
b86af064 GM |
4799 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
4800 | ||
4801 | static void | |
fd05c7e9 | 4802 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 4803 | { |
261cb4bb | 4804 | void *p; |
177c0ea7 | 4805 | |
b86af064 GM |
4806 | BLOCK_INPUT; |
4807 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4808 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4809 | #elif defined REL_ALLOC |
261cb4bb | 4810 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4811 | #else |
815add84 | 4812 | p = xmalloc (nbytes); |
b86af064 | 4813 | #endif |
177c0ea7 | 4814 | |
b86af064 GM |
4815 | if (p == NULL) |
4816 | { | |
4817 | UNBLOCK_INPUT; | |
531b0165 | 4818 | memory_full (nbytes); |
b86af064 GM |
4819 | } |
4820 | ||
4821 | b->text->beg = (unsigned char *) p; | |
4822 | UNBLOCK_INPUT; | |
4823 | } | |
4824 | ||
4825 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4826 | shrink it. */ | |
4827 | ||
4828 | void | |
d311d28c | 4829 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 4830 | { |
261cb4bb | 4831 | void *p; |
fd05c7e9 PE |
4832 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4833 | + delta); | |
b86af064 GM |
4834 | BLOCK_INPUT; |
4835 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4836 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4837 | #elif defined REL_ALLOC |
261cb4bb | 4838 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
4839 | #else |
4840 | p = xrealloc (b->text->beg, nbytes); | |
4841 | #endif | |
177c0ea7 | 4842 | |
b86af064 GM |
4843 | if (p == NULL) |
4844 | { | |
4845 | UNBLOCK_INPUT; | |
531b0165 | 4846 | memory_full (nbytes); |
b86af064 GM |
4847 | } |
4848 | ||
4849 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4850 | UNBLOCK_INPUT; | |
4851 | } | |
4852 | ||
4853 | ||
4854 | /* Free buffer B's text buffer. */ | |
4855 | ||
4856 | static void | |
d3da34e0 | 4857 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4858 | { |
4859 | BLOCK_INPUT; | |
4860 | ||
4861 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4862 | mmap_free ((void **) &b->text->beg); |
b86af064 | 4863 | #elif defined REL_ALLOC |
261cb4bb | 4864 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
4865 | #else |
4866 | xfree (b->text->beg); | |
4867 | #endif | |
177c0ea7 | 4868 | |
b86af064 GM |
4869 | BUF_BEG_ADDR (b) = NULL; |
4870 | UNBLOCK_INPUT; | |
4871 | } | |
4872 | ||
4873 | ||
4874 | \f | |
4875 | /*********************************************************************** | |
4876 | Initialization | |
4877 | ***********************************************************************/ | |
4878 | ||
dfcf069d | 4879 | void |
d3da34e0 | 4880 | init_buffer_once (void) |
1ab256cb | 4881 | { |
7c02e886 | 4882 | int idx; |
3884d954 DA |
4883 | /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make |
4884 | sure that this is still correct. Otherwise, mark_vectorlike may not | |
4885 | trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */ | |
38182d90 | 4886 | const int pvecsize |
3884d954 DA |
4887 | = (offsetof (struct buffer, own_text) - sizeof (struct vectorlike_header)) |
4888 | / sizeof (Lisp_Object); | |
7c02e886 | 4889 | |
72af86bd | 4890 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4891 | |
1ab256cb RM |
4892 | /* Make sure all markable slots in buffer_defaults |
4893 | are initialized reasonably, so mark_buffer won't choke. */ | |
4894 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4895 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4896 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4897 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4898 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4899 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4900 | /* Prevent GC from getting confused. */ |
4901 | buffer_defaults.text = &buffer_defaults.own_text; | |
4902 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
4903 | /* No one will share the text with these buffers, but let's play it safe. */ |
4904 | buffer_defaults.indirections = 0; | |
4905 | buffer_local_symbols.indirections = 0; | |
336cd056 RS |
4906 | BUF_INTERVALS (&buffer_defaults) = 0; |
4907 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3884d954 | 4908 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, pvecsize); |
67180c6a | 4909 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3884d954 | 4910 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, pvecsize); |
67180c6a | 4911 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4912 | |
4913 | /* Set up the default values of various buffer slots. */ | |
4914 | /* Must do these before making the first buffer! */ | |
4915 | ||
f532dca0 | 4916 | /* real setup is done in bindings.el */ |
2a0213a6 | 4917 | BVAR (&buffer_defaults, mode_line_format) = build_pure_c_string ("%-"); |
4b4deea2 TT |
4918 | BVAR (&buffer_defaults, header_line_format) = Qnil; |
4919 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4920 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4921 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4922 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4923 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
4b4deea2 | 4924 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
4b4deea2 TT |
4925 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4926 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4927 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4928 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4929 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4930 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4931 | buffer_defaults.overlays_before = NULL; |
4932 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4933 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4934 | |
4b4deea2 TT |
4935 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4936 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4937 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4938 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4cc60b9b | 4939 | BVAR (&buffer_defaults, bidi_display_reordering) = Qt; |
4b4deea2 TT |
4940 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; |
4941 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4942 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4943 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4944 | |
4b4deea2 TT |
4945 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4946 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4947 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4948 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4949 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4950 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4951 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4952 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4953 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4954 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4955 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4956 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4957 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4958 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4959 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4960 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4961 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4962 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4963 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4964 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4965 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4966 | |
4967 | /* Assign the local-flags to the slots that have default values. | |
4968 | The local flag is a bit that is used in the buffer | |
4969 | to say that it has its own local value for the slot. | |
4970 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4971 | ||
4972 | /* Nothing can work if this isn't true */ | |
d6202519 | 4973 | { verify (sizeof (EMACS_INT) == sizeof (Lisp_Object)); } |
1ab256cb RM |
4974 | |
4975 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4976 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4977 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4978 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4979 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4980 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4981 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4982 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4983 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4984 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
4985 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
4986 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
4987 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
4988 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
4989 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
4990 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
4991 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
4992 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
4993 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
4994 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 4995 | |
7c02e886 | 4996 | idx = 1; |
4b4deea2 TT |
4997 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
4998 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
4999 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5000 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5001 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5002 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5003 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5004 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5005 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5006 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5007 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5008 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5009 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5010 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5011 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5014 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5016 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5017 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5018 | /* Make this one a permanent local. */ |
7c02e886 | 5019 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5020 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5021 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5022 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5023 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5024 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5025 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5026 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5027 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5028 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5029 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5030 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5031 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5032 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5033 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5034 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5035 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5036 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5037 | |
5038 | /* Need more room? */ | |
7313acd0 | 5039 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5040 | abort (); |
7313acd0 | 5041 | last_per_buffer_idx = idx; |
177c0ea7 | 5042 | |
1ab256cb RM |
5043 | Vbuffer_alist = Qnil; |
5044 | current_buffer = 0; | |
5045 | all_buffers = 0; | |
5046 | ||
2a0213a6 | 5047 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5048 | |
d67b4f80 | 5049 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5050 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5051 | |
d67b4f80 | 5052 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5053 | |
d67b4f80 | 5054 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5055 | |
d67b4f80 | 5056 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5057 | |
d67b4f80 | 5058 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5059 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5060 | |
1ab256cb | 5061 | /* super-magic invisible buffer */ |
2a0213a6 | 5062 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5063 | Vbuffer_alist = Qnil; |
5064 | ||
2a0213a6 | 5065 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5066 | |
5067 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5068 | } |
5069 | ||
dfcf069d | 5070 | void |
d3da34e0 | 5071 | init_buffer (void) |
1ab256cb | 5072 | { |
2381d133 | 5073 | char *pwd; |
136351b7 | 5074 | Lisp_Object temp; |
965d34eb | 5075 | ptrdiff_t len; |
1ab256cb | 5076 | |
b86af064 | 5077 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5078 | { |
5079 | /* When using the ralloc implementation based on mmap(2), buffer | |
5080 | text pointers will have been set to null in the dumped Emacs. | |
5081 | Map new memory. */ | |
5082 | struct buffer *b; | |
177c0ea7 | 5083 | |
52b852c7 | 5084 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5085 | if (b->text->beg == NULL) |
b86af064 | 5086 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5087 | } |
b86af064 | 5088 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5089 | |
1ab256cb | 5090 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5091 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5092 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5093 | |
01537133 | 5094 | pwd = get_current_dir_name (); |
a17b5ed1 | 5095 | |
156bdb41 | 5096 | if (!pwd) |
a17b5ed1 | 5097 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5098 | |
1ab256cb RM |
5099 | /* Maybe this should really use some standard subroutine |
5100 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5101 | len = strlen (pwd); |
5102 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5103 | { |
156bdb41 | 5104 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5105 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5106 | if (!pwd) |
5107 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5108 | pwd[len] = DIRECTORY_SEP; |
5109 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5110 | len++; |
f7975d07 | 5111 | } |
0995fa35 | 5112 | |
cb1caeaf | 5113 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, len); |
4b4deea2 | 5114 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5115 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5116 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5117 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5118 | BVAR (current_buffer, directory) |
5119 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5120 | |
0995fa35 RS |
5121 | /* Add /: to the front of the name |
5122 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5123 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5124 | if (! NILP (temp) |
5125 | /* If the default dir is just /, TEMP is non-nil | |
5126 | because of the ange-ftp completion handler. | |
5127 | However, it is not necessary to turn / into /:/. | |
5128 | So avoid doing that. */ | |
4b4deea2 TT |
5129 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5130 | BVAR (current_buffer, directory) | |
5131 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5132 | |
136351b7 | 5133 | temp = get_minibuffer (0); |
4b4deea2 | 5134 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5135 | |
5136 | free (pwd); | |
1ab256cb RM |
5137 | } |
5138 | ||
d6aa1876 SM |
5139 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5140 | Object stored in the current buffer. address is the address of the slot | |
5141 | in the buffer that is current now. */ | |
5142 | ||
5143 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5144 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5145 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5146 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5147 | VNAME is the name of the buffer slot. |
5148 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5149 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5150 | do { \ | |
5151 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5152 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5153 | } while (0) |
d6aa1876 SM |
5154 | |
5155 | static void | |
8ea90aa3 | 5156 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5157 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5158 | { |
ce5b453a | 5159 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5160 | int offset; |
5161 | ||
ce5b453a | 5162 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5163 | offset = (char *)address - (char *)current_buffer; |
5164 | ||
ce5b453a SM |
5165 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5166 | bo_fwd->offset = offset; | |
5167 | bo_fwd->slottype = type; | |
b9598260 | 5168 | sym->declared_special = 1; |
ce5b453a SM |
5169 | sym->redirect = SYMBOL_FORWARDED; |
5170 | { | |
5171 | /* I tried to do the job without a cast, but it seems impossible. | |
5172 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5173 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5174 | } | |
5175 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5176 | |
5177 | if (PER_BUFFER_IDX (offset) == 0) | |
5178 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5179 | slot of buffer_local_flags */ | |
5180 | abort (); | |
5181 | } | |
5182 | ||
5183 | ||
1ab256cb | 5184 | /* initialize the buffer routines */ |
dfcf069d | 5185 | void |
d3da34e0 | 5186 | syms_of_buffer (void) |
1ab256cb | 5187 | { |
9115729e KH |
5188 | staticpro (&last_overlay_modification_hooks); |
5189 | last_overlay_modification_hooks | |
5190 | = Fmake_vector (make_number (10), Qnil); | |
5191 | ||
1ab256cb RM |
5192 | staticpro (&Vbuffer_defaults); |
5193 | staticpro (&Vbuffer_local_symbols); | |
5194 | staticpro (&Qfundamental_mode); | |
5195 | staticpro (&Qmode_class); | |
5196 | staticpro (&QSFundamental); | |
5197 | staticpro (&Vbuffer_alist); | |
5198 | staticpro (&Qprotected_field); | |
5199 | staticpro (&Qpermanent_local); | |
5200 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5201 | |
5202 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5203 | DEFSYM (Qoverlayp, "overlayp"); | |
5204 | DEFSYM (Qevaporate, "evaporate"); | |
5205 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5206 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5207 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5208 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5209 | DEFSYM (Qpriority, "priority"); | |
5210 | DEFSYM (Qbefore_string, "before-string"); | |
5211 | DEFSYM (Qafter_string, "after-string"); | |
5212 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5213 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5214 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5215 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5216 | ||
1ab256cb | 5217 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5218 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5219 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5220 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5221 | |
422745d0 TT |
5222 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5223 | mode_line_format, | |
5224 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5225 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5226 | |
422745d0 TT |
5227 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5228 | header_line_format, | |
5229 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5230 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5231 | |
422745d0 TT |
5232 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5233 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5234 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5235 | |
422745d0 TT |
5236 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5237 | extra_line_spacing, | |
5238 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5239 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5240 | |
422745d0 TT |
5241 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5242 | cursor_in_non_selected_windows, | |
5243 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5244 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5245 | ||
422745d0 TT |
5246 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5247 | abbrev_mode, | |
5248 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5249 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5250 | |
422745d0 TT |
5251 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5252 | ctl_arrow, | |
5253 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5254 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5255 | |
422745d0 TT |
5256 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5257 | enable_multibyte_characters, | |
fb7ada5f | 5258 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5259 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5260 | |
422745d0 TT |
5261 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5262 | buffer_file_coding_system, | |
5263 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5264 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5265 | |
422745d0 TT |
5266 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5267 | truncate_lines, | |
5268 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5269 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5270 | |
422745d0 TT |
5271 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5272 | fill_column, | |
5273 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5274 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5275 | |
422745d0 TT |
5276 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5277 | left_margin, | |
5278 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5279 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5280 | |
422745d0 TT |
5281 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5282 | tab_width, | |
5283 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5284 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5285 | |
422745d0 TT |
5286 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5287 | case_fold_search, | |
5288 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5289 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5290 | |
422745d0 TT |
5291 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5292 | left_margin_cols, | |
5293 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5294 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5295 | |
422745d0 TT |
5296 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5297 | right_margin_cols, | |
5298 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5299 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5300 | |
422745d0 TT |
5301 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5302 | left_fringe_width, | |
5303 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5304 | This is the same as (default-value 'left-fringe-width). */); |
5305 | ||
422745d0 TT |
5306 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5307 | right_fringe_width, | |
5308 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5309 | This is the same as (default-value 'right-fringe-width). */); |
5310 | ||
422745d0 TT |
5311 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5312 | fringes_outside_margins, | |
5313 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5314 | This is the same as (default-value 'fringes-outside-margins). */); |
5315 | ||
422745d0 TT |
5316 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5317 | scroll_bar_width, | |
5318 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5319 | This is the same as (default-value 'scroll-bar-width). */); |
5320 | ||
422745d0 TT |
5321 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5322 | vertical_scroll_bar_type, | |
5323 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5324 | This is the same as (default-value 'vertical-scroll-bar). */); |
5325 | ||
422745d0 TT |
5326 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5327 | indicate_empty_lines, | |
5328 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5329 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5330 | |
422745d0 TT |
5331 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5332 | indicate_buffer_boundaries, | |
5333 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5334 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5335 | ||
422745d0 TT |
5336 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5337 | fringe_indicator_alist, | |
5338 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5339 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5340 | ||
422745d0 TT |
5341 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5342 | fringe_cursor_alist, | |
5343 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5344 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5345 | ||
422745d0 TT |
5346 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5347 | scroll_up_aggressively, | |
5348 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5349 | This value applies in buffers that don't have their own local values. |
fc961256 | 5350 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5351 | |
422745d0 TT |
5352 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5353 | scroll_down_aggressively, | |
5354 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5355 | This value applies in buffers that don't have their own local values. |
fc961256 | 5356 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5357 | |
045dee35 | 5358 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5359 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5360 | Qnil, |
7614d762 RS |
5361 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5362 | The header line appears, optionally, at the top of a window; | |
5363 | the mode line appears at the bottom. */); | |
177c0ea7 | 5364 | |
4b4deea2 | 5365 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5366 | Qnil, |
5367 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5368 | |
5369 | The value may be nil, a string, a symbol or a list. | |
5370 | ||
018ba359 | 5371 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5372 | |
5373 | For any symbol other than t or nil, the symbol's value is processed as | |
5374 | a mode line construct. As a special exception, if that value is a | |
5375 | string, the string is processed verbatim, without handling any | |
5376 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5377 | `risky-local-variable' property, all properties in any strings, as | |
5378 | well as all :eval and :propertize forms in the value, are ignored. | |
5379 | ||
5380 | A list whose car is a string or list is processed by processing each | |
5381 | of the list elements recursively, as separate mode line constructs, | |
5382 | and concatenating the results. | |
5383 | ||
5384 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5385 | using the result as a mode line construct. Be careful--FORM should | |
5386 | not load any files, because that can cause an infinite recursion. | |
5387 | ||
5388 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5389 | processing ELT as the mode line construct, and adding the text | |
5390 | properties PROPS to the result. | |
5391 | ||
5392 | A list whose car is a symbol is processed by examining the symbol's | |
5393 | value, and, if that value is non-nil, processing the cadr of the list | |
5394 | recursively; and if that value is nil, processing the caddr of the | |
5395 | list recursively. | |
5396 | ||
5397 | A list whose car is an integer is processed by processing the cadr of | |
5398 | the list, and padding (if the number is positive) or truncating (if | |
5399 | negative) to the width specified by that number. | |
5400 | ||
018ba359 | 5401 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5402 | %b -- print buffer name. %f -- print visited file name. |
5403 | %F -- print frame name. | |
5404 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5405 | %& is like %*, but ignore read-only-ness. | |
5406 | % means buffer is read-only and * means it is modified. | |
5407 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5408 | %s -- print process status. %l -- print the current line number. | |
5409 | %c -- print the current column number (this makes editing slower). | |
5410 | To make the column number update correctly in all cases, | |
5411 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5412 | %i -- print the size of the buffer. |
5413 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5414 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5415 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5416 | or print Bottom or All. | |
018ba359 | 5417 | %n -- print Narrow if appropriate. |
dafbe726 | 5418 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5419 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5420 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5421 | %e -- print error message about full memory. |
f7165034 NR |
5422 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5423 | remote machine. | |
018ba359 PJ |
5424 | %[ -- print one [ for each recursive editing level. %] similar. |
5425 | %% -- print %. %- -- print infinitely many dashes. | |
5426 | Decimal digits after the % specify field width to which to pad. */); | |
5427 | ||
422745d0 | 5428 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5429 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5430 | |
4b4deea2 | 5431 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5432 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5433 | doc: /* Symbol for current buffer's major mode. |
5434 | The default value (normally `fundamental-mode') affects new buffers. | |
5435 | A value of nil means to use the current buffer's major mode, provided | |
5436 | it is not marked as "special". | |
5437 | ||
5438 | When a mode is used by default, `find-file' switches to it before it | |
5439 | reads the contents into the buffer and before it finishes setting up | |
5440 | the buffer. Thus, the mode and its hooks should not expect certain | |
5441 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5442 | to be set up. */); | |
1ab256cb | 5443 | |
4b4deea2 | 5444 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5445 | Qnil, |
64a7c220 | 5446 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5447 | Usually a string, but can use any of the constructs for `mode-line-format', |
5448 | which see. | |
5449 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5450 | |
4b4deea2 | 5451 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5452 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5453 | ||
4b4deea2 | 5454 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5455 | doc: /* Non-nil if Abbrev mode is enabled. |
5456 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5457 | |
4b4deea2 | 5458 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5459 | Qnil, |
fb7ada5f | 5460 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5461 | |
4b4deea2 | 5462 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
d5040d2d | 5463 | make_number (Lisp_Int0), |
fb7ada5f | 5464 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5465 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5466 | |
4b4deea2 | 5467 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
d5040d2d | 5468 | make_number (Lisp_Int0), |
fb7ada5f | 5469 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5470 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5471 | |
4b4deea2 | 5472 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
d5040d2d | 5473 | make_number (Lisp_Int0), |
fb7ada5f | 5474 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5475 | This should be an integer greater than zero. */); |
1ab256cb | 5476 | |
4b4deea2 | 5477 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5478 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5479 | A value of nil means use backslash and octal digits. |
5480 | This variable does not apply to characters whose display is specified | |
5481 | in the current display table (if there is one). */); | |
1ab256cb | 5482 | |
3b06f880 | 5483 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5484 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5485 | Qnil, |
efc7e75f | 5486 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5487 | Otherwise they are regarded as unibyte. This affects the display, |
5488 | file I/O and the behavior of various editing commands. | |
5489 | ||
5490 | This variable is buffer-local but you cannot set it directly; | |
5491 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5492 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5493 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5494 | |
c71b5d9b | 5495 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5496 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5497 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5498 | This variable applies to saving the buffer, and also to `write-region' |
5499 | and other functions that use `write-region'. | |
5500 | It does not apply to sending output to subprocesses, however. | |
5501 | ||
5502 | If this is nil, the buffer is saved without any code conversion | |
5503 | unless some coding system is specified in `file-coding-system-alist' | |
5504 | for the buffer file. | |
5505 | ||
31a6cb06 EZ |
5506 | If the text to be saved cannot be encoded as specified by this variable, |
5507 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5508 | ||
018ba359 PJ |
5509 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5510 | ||
5511 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5512 | |
f44e260c | 5513 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5514 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5515 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5516 | |
6c0cf218 | 5517 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5518 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5519 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5520 | |
b44d9321 EZ |
5521 | If this is nil (the default), the direction of each paragraph is |
5522 | determined by the first strong directional character of its text. | |
5523 | The values of `right-to-left' and `left-to-right' override that. | |
5524 | Any other value is treated as nil. | |
b4bf28b7 | 5525 | |
b44d9321 EZ |
5526 | This variable has no effect unless the buffer's value of |
5527 | \`bidi-display-reordering' is non-nil. */); | |
5528 | ||
4b4deea2 | 5529 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5530 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5531 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5532 | |
5533 | Note that this is overridden by the variable | |
5534 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5535 | and this buffer is not full-frame width. |
5536 | ||
5537 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5538 | |
4b4deea2 | 5539 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5540 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5541 | When word-wrapping is on, continuation lines are wrapped at the space |
5542 | or tab character nearest to the right window edge. | |
5543 | If nil, continuation lines are wrapped at the right screen edge. | |
5544 | ||
5545 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5546 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5547 | word-wrapping, you might want to reduce the value of | |
5548 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5549 | in narrower windows. |
5550 | ||
5551 | Instead of setting this variable directly, most users should use | |
5552 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5553 | to t, and additionally redefines simple editing commands to act on | |
5554 | visual lines rather than logical lines. See the documentation of | |
5555 | `visual-line-mode'. */); | |
0858cd02 | 5556 | |
4b4deea2 | 5557 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5558 | make_number (Lisp_String), |
efc7e75f | 5559 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5560 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5561 | |
4b4deea2 | 5562 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5563 | Qnil, |
efc7e75f | 5564 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5565 | It is called after self-inserting any character specified in |
5566 | the `auto-fill-chars' table. | |
5567 | NOTE: This variable is not a hook; | |
5568 | its value may not be a list of functions. */); | |
1ab256cb | 5569 | |
4b4deea2 | 5570 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5571 | make_number (Lisp_String), |
efc7e75f | 5572 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5573 | |
4b4deea2 | 5574 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5575 | make_number (Lisp_String), |
efc7e75f | 5576 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5577 | The truename of a file is calculated by `file-truename' |
5578 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5579 | |
1ab256cb | 5580 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5581 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5582 | make_number (Lisp_String), |
7614d762 RS |
5583 | doc: /* Name of file for auto-saving current buffer. |
5584 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5585 | |
4b4deea2 | 5586 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5587 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5588 | |
4b4deea2 | 5589 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5590 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5591 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5592 | |
4b4deea2 | 5593 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
d5040d2d | 5594 | make_number (Lisp_Int0), |
efc7e75f | 5595 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5596 | 0 initially. |
5597 | -1 means auto-saving turned off until next real save. | |
5598 | ||
5599 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5600 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5601 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5602 | |
4b4deea2 | 5603 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5604 | Qnil, |
7614d762 | 5605 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5606 | An integer N as value means display only lines |
5607 | that start with less than N columns of space. | |
7614d762 RS |
5608 | A value of t means that the character ^M makes itself and |
5609 | all the rest of the line invisible; also, when saving the buffer | |
5610 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5611 | |
1ab256cb | 5612 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5613 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5614 | Qnil, |
3f676284 | 5615 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5616 | |
4b4deea2 | 5617 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5618 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5619 | The value should be one of `overwrite-mode-textual', |
5620 | `overwrite-mode-binary', or nil. | |
5621 | If it is `overwrite-mode-textual', self-insertion still | |
5622 | inserts at the end of a line, and inserts when point is before a tab, | |
5623 | until the tab is filled in. | |
5624 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5625 | ||
4b4deea2 | 5626 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5627 | Qnil, |
efc7e75f | 5628 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5629 | |
5630 | If this variable is nil, the value of `standard-display-table' is used. | |
5631 | Each window can have its own, overriding display table, see | |
5632 | `set-window-display-table' and `window-display-table'. | |
5633 | ||
5634 | The display table is a char-table created with `make-display-table'. | |
5635 | A char-table is an array indexed by character codes. Normal array | |
5636 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5637 | ||
5638 | Each of the char-table elements control how to display the corresponding | |
5639 | text character: the element at index C in the table says how to display | |
5640 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5641 | characters or nil. The value nil means display the character in the |
5642 | default fashion; otherwise, the characters from the vector are delivered | |
5643 | to the screen instead of the original character. | |
018ba359 | 5644 | |
5fd11dc8 | 5645 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5646 | to display a capital Y instead of each X character. |
018ba359 PJ |
5647 | |
5648 | In addition, a char-table has six extra slots to control the display of: | |
5649 | ||
5650 | the end of a truncated screen line (extra-slot 0, a single character); | |
5651 | the end of a continued line (extra-slot 1, a single character); | |
5652 | the escape character used to display character codes in octal | |
5653 | (extra-slot 2, a single character); | |
5654 | the character used as an arrow for control characters (extra-slot 3, | |
5655 | a single character); | |
5656 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5657 | a vector of characters); | |
5658 | the character used to draw the border between side-by-side windows | |
5659 | (extra-slot 5, a single character). | |
5660 | ||
5661 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5662 | |
4b4deea2 | 5663 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5664 | Qnil, |
fb7ada5f | 5665 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5666 | A value of nil means no marginal area. */); |
177c0ea7 | 5667 | |
4b4deea2 | 5668 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5669 | Qnil, |
fb7ada5f | 5670 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5671 | A value of nil means no marginal area. */); |
177c0ea7 | 5672 | |
4b4deea2 | 5673 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5674 | Qnil, |
fb7ada5f | 5675 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5676 | A value of 0 means no left fringe is shown in this buffer's window. |
5677 | A value of nil means to use the left fringe width from the window's frame. */); | |
5678 | ||
4b4deea2 | 5679 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5680 | Qnil, |
fb7ada5f | 5681 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5682 | A value of 0 means no right fringe is shown in this buffer's window. |
5683 | A value of nil means to use the right fringe width from the window's frame. */); | |
5684 | ||
4b4deea2 | 5685 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5686 | Qnil, |
fb7ada5f | 5687 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5688 | A value of nil means to display fringes between margins and buffer text. */); |
5689 | ||
4b4deea2 | 5690 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5691 | Qnil, |
fb7ada5f | 5692 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5693 | A value of nil means to use the scroll bar width from the window's frame. */); |
5694 | ||
4b4deea2 | 5695 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5696 | Qnil, |
fb7ada5f | 5697 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5698 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5699 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5700 | |
fc2c8887 RS |
5701 | A value of `left' or `right' means put the vertical scroll bar at that side |
5702 | of the window; a value of nil means don't show any vertical scroll bars. | |
5703 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5704 | |
0552666b | 5705 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5706 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5707 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5708 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5709 | window-systems. */); | |
177c0ea7 | 5710 | |
6b61353c | 5711 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5712 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5713 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5714 | If non-nil, the first and last line of the buffer are marked in the fringe |
5715 | of a window on window-systems with angle bitmaps, or if the window can be | |
5716 | scrolled, the top and bottom line of the window are marked with up and down | |
5717 | arrow bitmaps. | |
b2229037 KS |
5718 | |
5719 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5720 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5721 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5722 | the left fringe but no arrows. |
b2229037 | 5723 | |
79e3497d RS |
5724 | You can exercise more precise control by using an alist as the |
5725 | value. Each alist element (INDICATOR . POSITION) specifies | |
5726 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5727 | `bottom', `up', `down', or t, which specifies the default position, |
5728 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5729 | this indicator. | |
5730 | ||
5731 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5732 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5733 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5734 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5735 | |
c6a46372 | 5736 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5737 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5738 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5739 | The value is an alist where each element (INDICATOR . BITMAPS) |
5740 | specifies the fringe bitmaps used to display a specific logical | |
5741 | fringe indicator. | |
5742 | ||
5743 | INDICATOR specifies the logical indicator type which is one of the | |
5744 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5745 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5746 | |
14fb5704 | 5747 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5748 | the actual bitmap shown in the left or right fringe for the logical |
5749 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5750 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5751 | are used only for the `bottom' and `top-bottom' indicators when the |
5752 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5753 | symbol which is used in both left and right fringes. */); |
5754 | ||
5755 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5756 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5757 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5758 | The value is an alist where each element (CURSOR . BITMAP) |
5759 | specifies the fringe bitmaps used to display a specific logical | |
5760 | cursor type in the fringe. | |
5761 | ||
5762 | CURSOR specifies the logical cursor type which is one of the following | |
5763 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5764 | one is used to show a hollow cursor on narrow lines display lines | |
5765 | where the normal hollow cursor will not fit. | |
5766 | ||
5767 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5768 | cursor type. */); | |
5769 | ||
0552666b | 5770 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5771 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5772 | doc: /* How far to scroll windows upward. |
5773 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5774 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5775 | means scroll to center point. A fraction means scroll to put point |
5776 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5777 | When the value is 0.0, point goes at the bottom line, which in the |
5778 | simple case that you moved off with C-f means scrolling just one line. | |
5779 | 1.0 means point goes at the top, so that in that simple case, the | |
5780 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5781 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5782 | |
0552666b | 5783 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5784 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5785 | doc: /* How far to scroll windows downward. |
5786 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5787 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5788 | means scroll to center point. A fraction means scroll to put point |
5789 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5790 | When the value is 0.0, point goes at the top line, which in the |
5791 | simple case that you moved off with C-b means scrolling just one line. | |
5792 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5793 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5794 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5795 | |
1ab256cb RM |
5796 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5797 | "Don't ask."); | |
5798 | */ | |
1ab256cb | 5799 | |
29208e82 | 5800 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5801 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5802 | Two arguments are passed to each function: the positions of |
5803 | the beginning and end of the range of old text to be changed. | |
5804 | \(For an insertion, the beginning and end are at the same place.) | |
5805 | No information is given about the length of the text after the change. | |
5806 | ||
5807 | Buffer changes made while executing the `before-change-functions' | |
5808 | don't call any before-change or after-change functions. | |
7b2bf907 | 5809 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5810 | |
5811 | If an unhandled error happens in running these functions, | |
5812 | the variable's value remains nil. That prevents the error | |
5813 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5814 | Vbefore_change_functions = Qnil; |
5815 | ||
29208e82 | 5816 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5817 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5818 | Three arguments are passed to each function: the positions of |
5819 | the beginning and end of the range of changed text, | |
5820 | and the length in bytes of the pre-change text replaced by that range. | |
5821 | \(For an insertion, the pre-change length is zero; | |
5822 | for a deletion, that length is the number of bytes deleted, | |
5823 | and the post-change beginning and end are at the same place.) | |
5824 | ||
5825 | Buffer changes made while executing the `after-change-functions' | |
5826 | don't call any before-change or after-change functions. | |
7b2bf907 | 5827 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5828 | |
5829 | If an unhandled error happens in running these functions, | |
5830 | the variable's value remains nil. That prevents the error | |
5831 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5832 | Vafter_change_functions = Qnil; |
5833 | ||
29208e82 | 5834 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5835 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5836 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5837 | Vfirst_change_hook = Qnil; |
1ab256cb | 5838 | |
4b4deea2 | 5839 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5840 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5841 | Recent changes come first; older changes follow newer. |
5842 | ||
5843 | An entry (BEG . END) represents an insertion which begins at | |
5844 | position BEG and ends at position END. | |
5845 | ||
5846 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5847 | from (abs POSITION). If POSITION is positive, point was at the front | |
5848 | of the text being deleted; if negative, point was at the end. | |
5849 | ||
d35af63c PE |
5850 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
5851 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
5852 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
5853 | modification time of the most recent save is different, this entry is |
5854 | obsolete. | |
5855 | ||
5856 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5857 | was modified between BEG and END. PROPERTY is the property name, | |
5858 | and VALUE is the old value. | |
5859 | ||
7405f386 KS |
5860 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5861 | \(apply FUN-NAME ARGS). | |
5862 | ||
5863 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5864 | in the active region. BEG and END is the range affected by this entry | |
5865 | and DELTA is the number of bytes added or deleted in that range by | |
5866 | this change. | |
c6c7dc03 | 5867 | |
018ba359 PJ |
5868 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5869 | was adjusted in position by the offset DISTANCE (an integer). | |
5870 | ||
5871 | An entry of the form POSITION indicates that point was at the buffer | |
5872 | location given by the integer. Undoing an entry of this form places | |
5873 | point at POSITION. | |
5874 | ||
b4c4f2f4 JB |
5875 | Entries with value `nil' mark undo boundaries. The undo command treats |
5876 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5877 | |
5878 | If the value of the variable is t, undo information is not recorded. */); | |
5879 | ||
4b4deea2 | 5880 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5881 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5882 | |
4b4deea2 | 5883 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5884 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5885 | |
5886 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5887 | newlines. Columnar operations (like `move-to-column' and |
5888 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5889 | widths as they go. This works well for ordinary text, but if the |
5890 | buffer's lines are very long (say, more than 500 characters), these | |
5891 | motion functions will take longer to execute. Emacs may also take | |
5892 | longer to update the display. | |
5893 | ||
5629f29b | 5894 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5895 | results of their scans, and consult the cache to avoid rescanning |
5896 | regions of the buffer until the text is modified. The caches are most | |
5897 | beneficial when they prevent the most searching---that is, when the | |
5898 | buffer contains long lines and large regions of characters with the | |
5899 | same, fixed screen width. | |
5900 | ||
5629f29b | 5901 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5902 | become slightly slower (because of the overhead of consulting the |
5903 | cache), and the caches will use memory roughly proportional to the | |
5904 | number of newlines and characters whose screen width varies. | |
5905 | ||
5906 | The caches require no explicit maintenance; their accuracy is | |
5907 | maintained internally by the Emacs primitives. Enabling or disabling | |
5908 | the cache should not affect the behavior of any of the motion | |
5909 | functions; it should only affect their performance. */); | |
5910 | ||
4b4deea2 | 5911 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5912 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5913 | |
4b4deea2 | 5914 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5915 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5916 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5917 | set when a file is visited. */); |
be9aafdd | 5918 | |
71ed49fa | 5919 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5920 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 5921 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
5922 | Should be a list of symbols naming formats that are defined in `format-alist'. |
5923 | If it is t, which is the default, auto-save files are written in the | |
5924 | same format as a regular save would use. */); | |
5925 | ||
3cb719bd | 5926 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5927 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5928 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5929 | The default is t, which means that text is invisible |
5930 | if it has a non-nil `invisible' property. | |
5931 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5932 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5933 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5934 | then characters with property value PROP are invisible, | |
5935 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5936 | |
7962a441 | 5937 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5938 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5939 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5940 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5941 | |
5942 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5943 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5944 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5945 | The function `set-window-buffer' updates this variable |
5946 | to the value obtained by calling `current-time'. | |
5947 | If the buffer has never been shown in a window, the value is nil. */); | |
5948 | ||
29208e82 | 5949 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5950 | doc: /* Non-nil if Transient Mark mode is enabled. |
5951 | See the command `transient-mark-mode' for a description of this minor mode. | |
5952 | ||
5953 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5954 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5955 | all windows or just the selected window. | |
5956 | ||
f49d1f52 | 5957 | Lisp programs may give this variable certain special values: |
9d794026 | 5958 | |
f49d1f52 SM |
5959 | - A value of `lambda' enables Transient Mark mode temporarily. |
5960 | It is disabled again after any subsequent action that would | |
5961 | normally deactivate the mark (e.g. buffer modification). | |
5962 | ||
5963 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5964 | temporarily. After any subsequent point motion command that is | |
5965 | not shift-translated, or any other action that would normally | |
5966 | deactivate the mark (e.g. buffer modification), the value of | |
5967 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5968 | Vtransient_mark_mode = Qnil; |
5969 | ||
29208e82 | 5970 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 5971 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5972 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5973 | text properties. If the value is a list, disregard `buffer-read-only' | |
5974 | and disregard a `read-only' text property if the property value | |
5975 | is a member of the list. */); | |
a96b68f1 RS |
5976 | Vinhibit_read_only = Qnil; |
5977 | ||
4b4deea2 | 5978 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5979 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5980 | Values are interpreted as follows: |
5981 | ||
b8dc613f JB |
5982 | t use the cursor specified for the frame |
5983 | nil don't display a cursor | |
5984 | box display a filled box cursor | |
5985 | hollow display a hollow box cursor | |
5986 | bar display a vertical bar cursor with default width | |
5987 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5988 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5989 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5990 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 5991 | |
e08b1705 MR |
5992 | When the buffer is displayed in a non-selected window, the |
5993 | cursor's appearance is instead controlled by the variable | |
5994 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 5995 | |
a3bbced0 | 5996 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 5997 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 5998 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
5999 | The space is measured in pixels, and put below lines on graphic displays, |
6000 | see `display-graphic-p'. | |
60ebfdf3 | 6001 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6002 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6003 | |
0124c5bd | 6004 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6005 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6006 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6007 | If nil, only shows a cursor in the selected window. |
6008 | If t, displays a cursor related to the usual cursor type | |
6009 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6010 | You can also specify the cursor type as in the `cursor-type' variable. | |
6011 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6012 | |
29208e82 | 6013 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6014 | doc: /* List of functions called with no args to query before killing a buffer. |
6015 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6016 | |
6017 | If any of them returns nil, the buffer is not killed. Functions run by | |
6018 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6019 | Vkill_buffer_query_functions = Qnil; |
6020 | ||
29208e82 | 6021 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6022 | doc: /* Normal hook run before changing the major mode of a buffer. |
6023 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6024 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6025 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6026 | |
9397e56f MR |
6027 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6028 | doc: /* Hook run when the buffer list changes. | |
6029 | Functions running this hook are `get-buffer-create', | |
6030 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6031 | and `bury-buffer-internal'. */); |
9397e56f | 6032 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6033 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6034 | |
0dc88e60 | 6035 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6036 | defsubr (&Sbuffer_list); |
6037 | defsubr (&Sget_buffer); | |
6038 | defsubr (&Sget_file_buffer); | |
6039 | defsubr (&Sget_buffer_create); | |
336cd056 | 6040 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6041 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6042 | defsubr (&Sbuffer_name); |
1ab256cb | 6043 | defsubr (&Sbuffer_file_name); |
336cd056 | 6044 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6045 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6046 | defsubr (&Sbuffer_local_variables); |
6047 | defsubr (&Sbuffer_modified_p); | |
6048 | defsubr (&Sset_buffer_modified_p); | |
6049 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6050 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6051 | defsubr (&Srename_buffer); |
6052 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6053 | defsubr (&Sbuffer_enable_undo); |
6054 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6055 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6056 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6057 | defsubr (&Scurrent_buffer); |
6058 | defsubr (&Sset_buffer); | |
6059 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6060 | defsubr (&Serase_buffer); |
13cda5f9 | 6061 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6062 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6063 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6064 | |
52f8ec73 | 6065 | defsubr (&Soverlayp); |
2eec3b4e RS |
6066 | defsubr (&Smake_overlay); |
6067 | defsubr (&Sdelete_overlay); | |
6068 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6069 | defsubr (&Soverlay_start); |
6070 | defsubr (&Soverlay_end); | |
6071 | defsubr (&Soverlay_buffer); | |
6072 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6073 | defsubr (&Soverlays_at); |
74514898 | 6074 | defsubr (&Soverlays_in); |
2eec3b4e | 6075 | defsubr (&Snext_overlay_change); |
239c932b | 6076 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6077 | defsubr (&Soverlay_recenter); |
6078 | defsubr (&Soverlay_lists); | |
6079 | defsubr (&Soverlay_get); | |
6080 | defsubr (&Soverlay_put); | |
a8c21b48 | 6081 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6082 | } |
6083 | ||
dfcf069d | 6084 | void |
d3da34e0 | 6085 | keys_of_buffer (void) |
1ab256cb RM |
6086 | { |
6087 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6088 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6089 | |
6090 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6091 | initialized when that function gets called. */ | |
d67b4f80 | 6092 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6093 | } |