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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 | ||
6b61353c | 59 | DECL_ALIGN (struct buffer, 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 | ||
6b61353c KH |
86 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
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 | |
cd64ea1d PE |
110 | static Lisp_Object Fset_buffer_major_mode (Lisp_Object); |
111 | static Lisp_Object Fdelete_overlay (Lisp_Object); | |
f57e2426 J |
112 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
113 | int after, Lisp_Object arg1, | |
114 | Lisp_Object arg2, Lisp_Object arg3); | |
115 | static void swap_out_buffer_local_variables (struct buffer *b); | |
116 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
117 | |
118 | /* Alist of all buffer names vs the buffers. */ | |
119 | /* This used to be a variable, but is no longer, | |
120 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
121 | Lisp_Object Vbuffer_alist; | |
122 | ||
955cbe7b | 123 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 124 | |
43ed3b8d | 125 | /* Hook run before changing a major mode. */ |
955cbe7b | 126 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 127 | |
dbc4e1c1 | 128 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
129 | Lisp_Object Qbefore_change_functions; |
130 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 131 | |
955cbe7b PE |
132 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
133 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 134 | |
955cbe7b | 135 | static Lisp_Object Qprotected_field; |
1ab256cb | 136 | |
955cbe7b | 137 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 138 | |
955cbe7b | 139 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 140 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 141 | |
955cbe7b | 142 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 143 | |
955cbe7b | 144 | static Lisp_Object Qoverlayp; |
52f8ec73 | 145 | |
955cbe7b | 146 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 147 | |
28545e04 | 148 | static Lisp_Object Qevaporate; |
5985d248 | 149 | |
294d215f RS |
150 | Lisp_Object Qmodification_hooks; |
151 | Lisp_Object Qinsert_in_front_hooks; | |
152 | Lisp_Object Qinsert_behind_hooks; | |
153 | ||
fd05c7e9 | 154 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
155 | static void free_buffer_text (struct buffer *b); |
156 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 157 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
f57e2426 | 158 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); |
b86af064 | 159 | |
1ab256cb RM |
160 | /* For debugging; temporary. See set_buffer_internal. */ |
161 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
162 | ||
01136e9b | 163 | void |
d3da34e0 | 164 | nsberror (Lisp_Object spec) |
1ab256cb | 165 | { |
a7a60ce9 | 166 | if (STRINGP (spec)) |
d5db4077 | 167 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
168 | error ("Invalid buffer argument"); |
169 | } | |
170 | \f | |
a7ca3326 | 171 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
172 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
173 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 174 | (Lisp_Object object) |
0dc88e60 | 175 | { |
4b4deea2 | 176 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
177 | ? Qt : Qnil); |
178 | } | |
179 | ||
08460cd4 | 180 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 181 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
182 | If the optional arg FRAME is a frame, we return the buffer list in the |
183 | proper order for that frame: the buffers show in FRAME come first, | |
184 | followed by the rest of the buffers. */) | |
5842a27b | 185 | (Lisp_Object frame) |
1ab256cb | 186 | { |
a18b8cb5 | 187 | Lisp_Object general; |
08460cd4 RS |
188 | general = Fmapcar (Qcdr, Vbuffer_alist); |
189 | ||
190 | if (FRAMEP (frame)) | |
191 | { | |
a18b8cb5 KL |
192 | Lisp_Object framelist, prevlist, tail; |
193 | Lisp_Object args[3]; | |
08460cd4 | 194 | |
b7826503 | 195 | CHECK_FRAME (frame); |
08460cd4 | 196 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f MR |
197 | prevlist = Fnreverse (Fcopy_sequence |
198 | (XFRAME (frame)->buried_buffer_list)); | |
08460cd4 | 199 | |
a18b8cb5 KL |
200 | /* Remove from GENERAL any buffer that duplicates one in |
201 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 202 | tail = framelist; |
a18b8cb5 | 203 | while (CONSP (tail)) |
08460cd4 | 204 | { |
7539e11f KR |
205 | general = Fdelq (XCAR (tail), general); |
206 | tail = XCDR (tail); | |
08460cd4 | 207 | } |
a18b8cb5 KL |
208 | tail = prevlist; |
209 | while (CONSP (tail)) | |
210 | { | |
211 | general = Fdelq (XCAR (tail), general); | |
212 | tail = XCDR (tail); | |
213 | } | |
214 | ||
215 | args[0] = framelist; | |
216 | args[1] = general; | |
217 | args[2] = prevlist; | |
218 | return Fnconc (3, args); | |
08460cd4 | 219 | } |
9397e56f MR |
220 | else |
221 | return general; | |
1ab256cb RM |
222 | } |
223 | ||
04ae1b48 RS |
224 | /* Like Fassoc, but use Fstring_equal to compare |
225 | (which ignores text properties), | |
226 | and don't ever QUIT. */ | |
227 | ||
228 | static Lisp_Object | |
d3da34e0 | 229 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
230 | { |
231 | register Lisp_Object tail; | |
6d70a280 | 232 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
233 | { |
234 | register Lisp_Object elt, tem; | |
6d70a280 | 235 | elt = XCAR (tail); |
04ae1b48 RS |
236 | tem = Fstring_equal (Fcar (elt), key); |
237 | if (!NILP (tem)) | |
238 | return elt; | |
239 | } | |
240 | return Qnil; | |
241 | } | |
242 | ||
a7ca3326 | 243 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
244 | doc: /* Return the buffer named BUFFER-OR-NAME. |
245 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
246 | is a string and there is no buffer with that name, return nil. If | |
247 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 248 | (register Lisp_Object buffer_or_name) |
1ab256cb | 249 | { |
c8804c4f MR |
250 | if (BUFFERP (buffer_or_name)) |
251 | return buffer_or_name; | |
252 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 253 | |
c8804c4f | 254 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
255 | } |
256 | ||
257 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 258 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
259 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
260 | If there is no such live buffer, return nil. | |
7ee72033 | 261 | See also `find-buffer-visiting'. */) |
5842a27b | 262 | (register Lisp_Object filename) |
1ab256cb RM |
263 | { |
264 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
265 | Lisp_Object handler; |
266 | ||
b7826503 | 267 | CHECK_STRING (filename); |
1ab256cb RM |
268 | filename = Fexpand_file_name (filename, Qnil); |
269 | ||
5fe0b67e RS |
270 | /* If the file name has special constructs in it, |
271 | call the corresponding file handler. */ | |
a617e913 | 272 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 273 | if (!NILP (handler)) |
a59225b1 CY |
274 | { |
275 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
276 | filename); | |
277 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
278 | } | |
5fe0b67e | 279 | |
7539e11f | 280 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 281 | { |
7539e11f | 282 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 283 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
284 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
285 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 286 | if (!NILP (tem)) |
1ab256cb RM |
287 | return buf; |
288 | } | |
289 | return Qnil; | |
290 | } | |
291 | ||
52e01189 | 292 | Lisp_Object |
d3da34e0 | 293 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
294 | { |
295 | register Lisp_Object tail, buf, tem; | |
296 | ||
7539e11f | 297 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 298 | { |
7539e11f | 299 | buf = Fcdr (XCAR (tail)); |
52e01189 | 300 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
301 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
302 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
303 | if (!NILP (tem)) |
304 | return buf; | |
305 | } | |
306 | return Qnil; | |
307 | } | |
308 | ||
a7ca3326 | 309 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
310 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
311 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
312 | return that buffer. If no such buffer exists, create a new buffer with | |
313 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
314 | buffer does not keep undo information. | |
315 | ||
316 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
317 | even if it is dead. The return value is never nil. */) | |
5842a27b | 318 | (register Lisp_Object buffer_or_name) |
1ab256cb | 319 | { |
cd265ca6 | 320 | register Lisp_Object buffer, name; |
1ab256cb RM |
321 | register struct buffer *b; |
322 | ||
cd265ca6 MR |
323 | buffer = Fget_buffer (buffer_or_name); |
324 | if (!NILP (buffer)) | |
325 | return buffer; | |
1ab256cb | 326 | |
cd265ca6 | 327 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
328 | error ("Empty string for buffer name is not allowed"); |
329 | ||
cc648cef | 330 | b = allocate_buffer (); |
1ab256cb | 331 | |
336cd056 RS |
332 | /* An ordinary buffer uses its own struct buffer_text. */ |
333 | b->text = &b->own_text; | |
334 | b->base_buffer = 0; | |
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 SM |
413 | Lisp_Object buffer; |
414 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
415 | |
416 | XSETBUFFER (buffer, b); | |
417 | ||
2410d73a | 418 | for (; list; list = list->next) |
04e4cb3a GM |
419 | { |
420 | Lisp_Object overlay, start, end, old_overlay; | |
d311d28c | 421 | ptrdiff_t charpos; |
04e4cb3a | 422 | |
2410d73a | 423 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
424 | charpos = marker_position (OVERLAY_START (old_overlay)); |
425 | start = Fmake_marker (); | |
db3a49a6 | 426 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
427 | XMARKER (start)->insertion_type |
428 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
429 | ||
430 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
431 | end = Fmake_marker (); | |
db3a49a6 | 432 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
433 | XMARKER (end)->insertion_type |
434 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
435 | ||
436 | overlay = allocate_misc (); | |
437 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
438 | OVERLAY_START (overlay) = start; | |
439 | OVERLAY_END (overlay) = end; | |
440 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 441 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 442 | |
2410d73a SM |
443 | if (tail) |
444 | tail = tail->next = XOVERLAY (overlay); | |
445 | else | |
446 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
447 | } |
448 | ||
2410d73a | 449 | return result; |
04e4cb3a | 450 | } |
177c0ea7 | 451 | |
04e4cb3a | 452 | |
7e9d5818 GM |
453 | /* Clone per-buffer values of buffer FROM. |
454 | ||
455 | Buffer TO gets the same per-buffer values as FROM, with the | |
456 | following exceptions: (1) TO's name is left untouched, (2) markers | |
457 | are copied and made to refer to TO, and (3) overlay lists are | |
458 | copied. */ | |
459 | ||
460 | static void | |
d3da34e0 | 461 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 462 | { |
54622f33 | 463 | Lisp_Object to_buffer; |
7e9d5818 GM |
464 | int offset; |
465 | ||
466 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 467 | |
3ee24aec SM |
468 | /* buffer-local Lisp variables start at `undo_list', |
469 | tho only the ones from `name' on are GC'd normally. */ | |
22b4128e PE |
470 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
471 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7e9d5818 GM |
472 | offset += sizeof (Lisp_Object)) |
473 | { | |
474 | Lisp_Object obj; | |
475 | ||
4b7cdc0e SM |
476 | /* Don't touch the `name' which should be unique for every buffer. */ |
477 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
478 | continue; | |
479 | ||
7e9d5818 | 480 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 481 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
482 | { |
483 | struct Lisp_Marker *m = XMARKER (obj); | |
484 | obj = Fmake_marker (); | |
485 | XMARKER (obj)->insertion_type = m->insertion_type; | |
486 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
487 | } | |
488 | ||
489 | PER_BUFFER_VALUE (to, offset) = obj; | |
490 | } | |
491 | ||
72af86bd | 492 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 493 | |
04e4cb3a GM |
494 | to->overlays_before = copy_overlays (to, from->overlays_before); |
495 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 496 | |
e1688f54 RS |
497 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
498 | and install that in TO. */ | |
4b4deea2 | 499 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
500 | } |
501 | ||
cffc6f3b CY |
502 | |
503 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
504 | current, update these markers. */ | |
505 | ||
506 | static void | |
507 | record_buffer_markers (struct buffer *b) | |
508 | { | |
509 | if (! NILP (BVAR (b, pt_marker))) | |
510 | { | |
511 | Lisp_Object buffer; | |
512 | ||
513 | eassert (!NILP (BVAR (b, begv_marker))); | |
514 | eassert (!NILP (BVAR (b, zv_marker))); | |
515 | ||
516 | XSETBUFFER (buffer, b); | |
517 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
518 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
519 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
520 | } | |
521 | } | |
522 | ||
523 | ||
524 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
525 | current, fetch these values into B->begv etc. */ | |
526 | ||
527 | static void | |
528 | fetch_buffer_markers (struct buffer *b) | |
529 | { | |
530 | if (! NILP (BVAR (b, pt_marker))) | |
531 | { | |
532 | Lisp_Object m; | |
533 | ||
534 | eassert (!NILP (BVAR (b, begv_marker))); | |
535 | eassert (!NILP (BVAR (b, zv_marker))); | |
536 | ||
537 | m = BVAR (b, pt_marker); | |
538 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
539 | ||
540 | m = BVAR (b, begv_marker); | |
541 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
542 | ||
543 | m = BVAR (b, zv_marker); | |
544 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
545 | } | |
546 | } | |
547 | ||
548 | ||
7e9d5818 GM |
549 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
550 | 2, 3, | |
193c3837 | 551 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 552 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 553 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
554 | NAME should be a string which is not the name of an existing buffer. |
555 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
556 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 557 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 558 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 559 | { |
6b61353c | 560 | Lisp_Object buf, tem; |
7e9d5818 | 561 | struct buffer *b; |
336cd056 | 562 | |
6b61353c | 563 | CHECK_STRING (name); |
336cd056 RS |
564 | buf = Fget_buffer (name); |
565 | if (!NILP (buf)) | |
d5db4077 | 566 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 567 | |
6b61353c | 568 | tem = base_buffer; |
336cd056 RS |
569 | base_buffer = Fget_buffer (base_buffer); |
570 | if (NILP (base_buffer)) | |
6b61353c | 571 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 572 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 573 | error ("Base buffer has been killed"); |
336cd056 | 574 | |
d5db4077 | 575 | if (SCHARS (name) == 0) |
336cd056 RS |
576 | error ("Empty string for buffer name is not allowed"); |
577 | ||
cc648cef | 578 | b = allocate_buffer (); |
336cd056 | 579 | |
67ee9f6e SM |
580 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
581 | ? XBUFFER (base_buffer)->base_buffer | |
582 | : XBUFFER (base_buffer)); | |
336cd056 RS |
583 | |
584 | /* Use the base buffer's text object. */ | |
585 | b->text = b->base_buffer->text; | |
586 | ||
cffc6f3b CY |
587 | b->pt = b->base_buffer->pt; |
588 | b->begv = b->base_buffer->begv; | |
589 | b->zv = b->base_buffer->zv; | |
590 | b->pt_byte = b->base_buffer->pt_byte; | |
591 | b->begv_byte = b->base_buffer->begv_byte; | |
592 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
593 | |
594 | b->newline_cache = 0; | |
595 | b->width_run_cache = 0; | |
4b4deea2 | 596 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
597 | |
598 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 599 | b->header.next.buffer = all_buffers; |
336cd056 RS |
600 | all_buffers = b; |
601 | ||
602 | name = Fcopy_sequence (name); | |
ab77f05c | 603 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 604 | BVAR (b, name) = name; |
336cd056 RS |
605 | |
606 | reset_buffer (b); | |
13de9290 | 607 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
608 | |
609 | /* Put this in the alist of all live buffers. */ | |
610 | XSETBUFFER (buf, b); | |
611 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
612 | ||
4b4deea2 | 613 | BVAR (b, mark) = Fmake_marker (); |
336cd056 | 614 | |
abc9d959 | 615 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 616 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 617 | |
336cd056 | 618 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 619 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 620 | { |
2aa46d6c CY |
621 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
622 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 623 | |
4b4deea2 TT |
624 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
625 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
cffc6f3b CY |
626 | b->base_buffer->pt, |
627 | b->base_buffer->pt_byte); | |
628 | ||
4b4deea2 TT |
629 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
630 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
cffc6f3b CY |
631 | b->base_buffer->begv, |
632 | b->base_buffer->begv_byte); | |
633 | ||
4b4deea2 TT |
634 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
635 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
cffc6f3b CY |
636 | b->base_buffer->zv, |
637 | b->base_buffer->zv_byte); | |
4b4deea2 | 638 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
639 | } |
640 | ||
7e9d5818 GM |
641 | if (NILP (clone)) |
642 | { | |
643 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 | 644 | BVAR (b, pt_marker) = Fmake_marker (); |
cffc6f3b | 645 | set_marker_both (BVAR (b, pt_marker), buf, b->pt, b->pt_byte); |
4b4deea2 | 646 | BVAR (b, begv_marker) = Fmake_marker (); |
cffc6f3b | 647 | set_marker_both (BVAR (b, begv_marker), buf, b->begv, b->begv_byte); |
4b4deea2 | 648 | BVAR (b, zv_marker) = Fmake_marker (); |
cffc6f3b | 649 | set_marker_both (BVAR (b, zv_marker), buf, b->zv, b->zv_byte); |
4b4deea2 | 650 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
651 | } |
652 | else | |
7fa57e45 RS |
653 | { |
654 | struct buffer *old_b = current_buffer; | |
655 | ||
656 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
657 | BVAR (b, filename) = Qnil; |
658 | BVAR (b, file_truename) = Qnil; | |
659 | BVAR (b, display_count) = make_number (0); | |
660 | BVAR (b, backed_up) = Qnil; | |
661 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
662 | set_buffer_internal_1 (b); |
663 | Fset (intern ("buffer-save-without-query"), Qnil); | |
664 | Fset (intern ("buffer-file-number"), Qnil); | |
665 | Fset (intern ("buffer-stale-function"), Qnil); | |
666 | set_buffer_internal_1 (old_b); | |
667 | } | |
336cd056 | 668 | |
9397e56f MR |
669 | /* Run buffer-list-update-hook. */ |
670 | if (!NILP (Vrun_hooks)) | |
671 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
672 | ||
a9ee7a59 | 673 | return buf; |
1ab256cb RM |
674 | } |
675 | ||
d4f5719a | 676 | void |
d3da34e0 | 677 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
678 | { |
679 | Lisp_Object overlay; | |
680 | ||
681 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
682 | have to empty the list, otherwise we end up with overlays that | |
683 | think they belong to this buffer while the buffer doesn't know about | |
684 | them any more. */ | |
685 | while (b->overlays_before) | |
686 | { | |
687 | XSETMISC (overlay, b->overlays_before); | |
688 | Fdelete_overlay (overlay); | |
689 | } | |
690 | while (b->overlays_after) | |
691 | { | |
692 | XSETMISC (overlay, b->overlays_after); | |
693 | Fdelete_overlay (overlay); | |
694 | } | |
695 | eassert (b->overlays_before == NULL); | |
696 | eassert (b->overlays_after == NULL); | |
697 | } | |
698 | ||
bcd40520 | 699 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 700 | and local variables. |
d4f5719a SM |
701 | If called on an already-initialized buffer, the list of overlays |
702 | should be deleted before calling this function, otherwise we end up | |
703 | with overlays that claim to belong to the buffer but the buffer | |
704 | claims it doesn't belong to it. */ | |
1ab256cb RM |
705 | |
706 | void | |
d3da34e0 | 707 | reset_buffer (register struct buffer *b) |
1ab256cb | 708 | { |
4b4deea2 TT |
709 | BVAR (b, filename) = Qnil; |
710 | BVAR (b, file_truename) = Qnil; | |
711 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 712 | b->modtime = 0; |
58b963f7 | 713 | b->modtime_size = -1; |
4b4deea2 | 714 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 715 | b->last_window_start = 1; |
8b264726 | 716 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
717 | b->clip_changed = 0; |
718 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 719 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 720 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 721 | b->auto_save_failure_time = 0; |
4b4deea2 TT |
722 | BVAR (b, auto_save_file_name) = Qnil; |
723 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
724 | b->overlays_before = NULL; |
725 | b->overlays_after = NULL; | |
c2d5b10f | 726 | b->overlay_center = BEG; |
4b4deea2 TT |
727 | BVAR (b, mark_active) = Qnil; |
728 | BVAR (b, point_before_scroll) = Qnil; | |
729 | BVAR (b, file_format) = Qnil; | |
730 | BVAR (b, auto_save_file_format) = Qt; | |
731 | BVAR (b, last_selected_window) = Qnil; | |
732 | XSETINT (BVAR (b, display_count), 0); | |
733 | BVAR (b, display_time) = Qnil; | |
734 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
735 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
736 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
737 | |
738 | b->display_error_modiff = 0; | |
1ab256cb RM |
739 | } |
740 | ||
bcd40520 RS |
741 | /* Reset buffer B's local variables info. |
742 | Don't use this on a buffer that has already been in use; | |
743 | it does not treat permanent locals consistently. | |
13de9290 RS |
744 | Instead, use Fkill_all_local_variables. |
745 | ||
3709505e | 746 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
747 | buffer-local variables. If PERMANENT_TOO is 0, |
748 | we preserve those. */ | |
bcd40520 | 749 | |
13de9290 | 750 | static void |
d3da34e0 | 751 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
752 | { |
753 | register int offset; | |
7c02e886 | 754 | int i; |
1ab256cb RM |
755 | |
756 | /* Reset the major mode to Fundamental, together with all the | |
757 | things that depend on the major mode. | |
758 | default-major-mode is handled at a higher level. | |
759 | We ignore it here. */ | |
4b4deea2 TT |
760 | BVAR (b, major_mode) = Qfundamental_mode; |
761 | BVAR (b, keymap) = Qnil; | |
762 | BVAR (b, mode_name) = QSFundamental; | |
763 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
764 | |
765 | /* If the standard case table has been altered and invalidated, | |
766 | fix up its insides first. */ | |
767 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
768 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
769 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
770 | Fset_standard_case_table (Vascii_downcase_table); | |
771 | ||
4b4deea2 TT |
772 | BVAR (b, downcase_table) = Vascii_downcase_table; |
773 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
774 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
775 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
776 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 777 | |
13de9290 | 778 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 779 | if (permanent_too) |
4b4deea2 | 780 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
781 | else |
782 | { | |
2f7a359d | 783 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 784 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 785 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
786 | { |
787 | /* If permanent-local, keep it. */ | |
788 | last = tmp; | |
789 | if (EQ (prop, Qpermanent_local_hook)) | |
790 | { | |
791 | /* This is a partially permanent hook variable. | |
792 | Preserve only the elements that want to be preserved. */ | |
793 | Lisp_Object list, newlist; | |
794 | list = XCDR (XCAR (tmp)); | |
795 | if (!CONSP (list)) | |
796 | newlist = list; | |
797 | else | |
798 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
799 | { | |
800 | Lisp_Object elt = XCAR (list); | |
801 | /* Preserve element ELT if it's t, | |
802 | if it is a function with a `permanent-local-hook' property, | |
803 | or if it's not a symbol. */ | |
804 | if (! SYMBOLP (elt) | |
805 | || EQ (elt, Qt) | |
806 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
807 | newlist = Fcons (elt, newlist); | |
808 | } | |
809 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
810 | } | |
811 | } | |
812 | /* Delete this local variable. */ | |
3709505e | 813 | else if (NILP (last)) |
4b4deea2 | 814 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
815 | else |
816 | XSETCDR (last, XCDR (tmp)); | |
817 | } | |
818 | ||
7313acd0 | 819 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 820 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 821 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
822 | |
823 | /* For each slot that has a default value, | |
824 | copy that into the slot. */ | |
825 | ||
3ee24aec SM |
826 | /* buffer-local Lisp variables start at `undo_list', |
827 | tho only the ones from `name' on are GC'd normally. */ | |
8a5c77bb PE |
828 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
829 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7c02e886 | 830 | offset += sizeof (Lisp_Object)) |
aab80822 | 831 | { |
7313acd0 | 832 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
833 | if ((idx > 0 |
834 | && (permanent_too | |
ce5b453a | 835 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 836 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 837 | } |
1ab256cb RM |
838 | } |
839 | ||
01050cb5 RM |
840 | /* We split this away from generate-new-buffer, because rename-buffer |
841 | and set-visited-file-name ought to be able to use this to really | |
842 | rename the buffer properly. */ | |
843 | ||
a7ca3326 | 844 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 845 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 846 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
847 | If there is no live buffer named NAME, then return NAME. |
848 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 849 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
850 | Optional second argument IGNORE specifies a name that is okay to use (if |
851 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 852 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
853 | { |
854 | register Lisp_Object gentemp, tem; | |
d311d28c PE |
855 | ptrdiff_t count; |
856 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 857 | |
b7826503 | 858 | CHECK_STRING (name); |
1ab256cb | 859 | |
6b61353c KH |
860 | tem = Fstring_equal (name, ignore); |
861 | if (!NILP (tem)) | |
862 | return name; | |
1ab256cb | 863 | tem = Fget_buffer (name); |
265a9e55 | 864 | if (NILP (tem)) |
01050cb5 | 865 | return name; |
1ab256cb RM |
866 | |
867 | count = 1; | |
868 | while (1) | |
869 | { | |
d311d28c | 870 | sprintf (number, "<%"pD"d>", ++count); |
1ab256cb | 871 | gentemp = concat2 (name, build_string (number)); |
638e4fc3 | 872 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
873 | if (!NILP (tem)) |
874 | return gentemp; | |
1ab256cb | 875 | tem = Fget_buffer (gentemp); |
265a9e55 | 876 | if (NILP (tem)) |
01050cb5 | 877 | return gentemp; |
1ab256cb RM |
878 | } |
879 | } | |
880 | ||
881 | \f | |
a7ca3326 | 882 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 883 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
884 | BUFFER defaults to the current buffer. |
885 | Return nil if BUFFER has been killed. */) | |
5842a27b | 886 | (register Lisp_Object buffer) |
1ab256cb | 887 | { |
265a9e55 | 888 | if (NILP (buffer)) |
4b4deea2 | 889 | return BVAR (current_buffer, name); |
b7826503 | 890 | CHECK_BUFFER (buffer); |
4b4deea2 | 891 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
892 | } |
893 | ||
a7ca3326 | 894 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
895 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
896 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 897 | (register Lisp_Object buffer) |
1ab256cb | 898 | { |
265a9e55 | 899 | if (NILP (buffer)) |
4b4deea2 | 900 | return BVAR (current_buffer, filename); |
b7826503 | 901 | CHECK_BUFFER (buffer); |
4b4deea2 | 902 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
903 | } |
904 | ||
336cd056 RS |
905 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
906 | 0, 1, 0, | |
7ee72033 | 907 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
908 | If BUFFER is not indirect, return nil. |
909 | BUFFER defaults to the current buffer. */) | |
5842a27b | 910 | (register Lisp_Object buffer) |
336cd056 RS |
911 | { |
912 | struct buffer *base; | |
913 | Lisp_Object base_buffer; | |
914 | ||
915 | if (NILP (buffer)) | |
916 | base = current_buffer->base_buffer; | |
917 | else | |
918 | { | |
b7826503 | 919 | CHECK_BUFFER (buffer); |
336cd056 RS |
920 | base = XBUFFER (buffer)->base_buffer; |
921 | } | |
922 | ||
923 | if (! base) | |
924 | return Qnil; | |
925 | XSETBUFFER (base_buffer, base); | |
926 | return base_buffer; | |
927 | } | |
928 | ||
a7ca3326 | 929 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 930 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
931 | doc: /* Return the value of VARIABLE in BUFFER. |
932 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 933 | is the default binding of the variable. */) |
5842a27b | 934 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
935 | { |
936 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
937 | ||
938 | if (EQ (result, Qunbound)) | |
939 | xsignal1 (Qvoid_variable, variable); | |
940 | ||
941 | return result; | |
942 | } | |
943 | ||
944 | ||
945 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
946 | locally unbound. */ | |
947 | ||
948 | Lisp_Object | |
949 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
950 | { |
951 | register struct buffer *buf; | |
952 | register Lisp_Object result; | |
ad97b375 | 953 | struct Lisp_Symbol *sym; |
79aa712d | 954 | |
5e2ad10b | 955 | CHECK_SYMBOL (variable); |
ae69175b | 956 | CHECK_BUFFER (buffer); |
79aa712d | 957 | buf = XBUFFER (buffer); |
ce5b453a | 958 | sym = XSYMBOL (variable); |
79aa712d | 959 | |
ce5b453a SM |
960 | start: |
961 | switch (sym->redirect) | |
f0bac7de | 962 | { |
ce5b453a SM |
963 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
964 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
965 | case SYMBOL_LOCALIZED: | |
966 | { /* Look in local_var_alist. */ | |
967 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
968 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 969 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
970 | if (!NILP (result)) |
971 | { | |
972 | if (blv->fwd) | |
973 | { /* What binding is loaded right now? */ | |
974 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 975 | |
ce5b453a SM |
976 | /* The value of the currently loaded binding is not |
977 | stored in it, but rather in the realvalue slot. | |
978 | Store that value into the binding it belongs to | |
979 | in case that is the one we are about to use. */ | |
f0bac7de | 980 | |
ce5b453a SM |
981 | XSETCDR (current_alist_element, |
982 | do_symval_forwarding (blv->fwd)); | |
983 | } | |
984 | /* Now get the (perhaps updated) value out of the binding. */ | |
985 | result = XCDR (result); | |
986 | } | |
987 | else | |
988 | result = Fdefault_value (variable); | |
989 | break; | |
990 | } | |
991 | case SYMBOL_FORWARDED: | |
992 | { | |
993 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
994 | if (BUFFER_OBJFWDP (fwd)) | |
995 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
996 | else | |
997 | result = Fdefault_value (variable); | |
998 | break; | |
999 | } | |
1000 | default: abort (); | |
f0bac7de | 1001 | } |
79aa712d | 1002 | |
5f2c76c6 | 1003 | return result; |
79aa712d RS |
1004 | } |
1005 | ||
e1688f54 | 1006 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1007 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
1008 | in special slots in the buffer object. */ |
1009 | ||
1010 | static Lisp_Object | |
d3da34e0 | 1011 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
1012 | { |
1013 | Lisp_Object result = Qnil; | |
1014 | register Lisp_Object tail; | |
4b4deea2 | 1015 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1016 | { |
1017 | Lisp_Object val, elt; | |
1018 | ||
1019 | elt = XCAR (tail); | |
1020 | ||
1021 | /* Reference each variable in the alist in buf. | |
1022 | If inquiring about the current buffer, this gets the current values, | |
1023 | so store them into the alist so the alist is up to date. | |
1024 | If inquiring about some other buffer, this swaps out any values | |
1025 | for that buffer, making the alist up to date automatically. */ | |
1026 | val = find_symbol_value (XCAR (elt)); | |
1027 | /* Use the current buffer value only if buf is the current buffer. */ | |
1028 | if (buf != current_buffer) | |
1029 | val = XCDR (elt); | |
1030 | ||
0992bd9c CY |
1031 | result = Fcons (EQ (val, Qunbound) |
1032 | ? XCAR (elt) | |
1033 | : Fcons (XCAR (elt), val), | |
1034 | result); | |
e1688f54 RS |
1035 | } |
1036 | ||
1037 | return result; | |
1038 | } | |
1039 | ||
1ab256cb | 1040 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1041 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1042 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1043 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1044 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1045 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1046 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1047 | (register Lisp_Object buffer) |
1ab256cb RM |
1048 | { |
1049 | register struct buffer *buf; | |
553defa4 | 1050 | register Lisp_Object result; |
1ab256cb | 1051 | |
265a9e55 | 1052 | if (NILP (buffer)) |
1ab256cb RM |
1053 | buf = current_buffer; |
1054 | else | |
1055 | { | |
b7826503 | 1056 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1057 | buf = XBUFFER (buffer); |
1058 | } | |
1059 | ||
e1688f54 | 1060 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1061 | |
1ab256cb RM |
1062 | /* Add on all the variables stored in special slots. */ |
1063 | { | |
7c02e886 | 1064 | int offset, idx; |
1ab256cb | 1065 | |
3ee24aec SM |
1066 | /* buffer-local Lisp variables start at `undo_list', |
1067 | tho only the ones from `name' on are GC'd normally. */ | |
8a5c77bb PE |
1068 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
1069 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7c02e886 GM |
1070 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1071 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1072 | { |
7313acd0 GM |
1073 | idx = PER_BUFFER_IDX (offset); |
1074 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1075 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1076 | { |
1077 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1078 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1079 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1080 | result); | |
1081 | } | |
1ab256cb RM |
1082 | } |
1083 | } | |
553defa4 RS |
1084 | |
1085 | return result; | |
1ab256cb | 1086 | } |
1ab256cb | 1087 | \f |
a7ca3326 | 1088 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1089 | 0, 1, 0, |
7ee72033 MB |
1090 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1091 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1092 | (register Lisp_Object buffer) |
1ab256cb RM |
1093 | { |
1094 | register struct buffer *buf; | |
265a9e55 | 1095 | if (NILP (buffer)) |
1ab256cb RM |
1096 | buf = current_buffer; |
1097 | else | |
1098 | { | |
b7826503 | 1099 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1100 | buf = XBUFFER (buffer); |
1101 | } | |
1102 | ||
336cd056 | 1103 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1104 | } |
1105 | ||
a7ca3326 | 1106 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1107 | 1, 1, 0, |
7ee72033 MB |
1108 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1109 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1110 | (register Lisp_Object flag) |
1ab256cb RM |
1111 | { |
1112 | register int already; | |
1113 | register Lisp_Object fn; | |
8ec01c70 | 1114 | Lisp_Object buffer, window; |
1ab256cb RM |
1115 | |
1116 | #ifdef CLASH_DETECTION | |
1117 | /* If buffer becoming modified, lock the file. | |
1118 | If buffer becoming unmodified, unlock the file. */ | |
1119 | ||
4b4deea2 | 1120 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1121 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1122 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1123 | { |
336cd056 | 1124 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1125 | if (!already && !NILP (flag)) |
1ab256cb | 1126 | lock_file (fn); |
265a9e55 | 1127 | else if (already && NILP (flag)) |
1ab256cb RM |
1128 | unlock_file (fn); |
1129 | } | |
1130 | #endif /* CLASH_DETECTION */ | |
1131 | ||
0b5397c2 SM |
1132 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1133 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1134 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1135 | modify SAVE_MODIFF to affect one, we may affect the other | |
1136 | as well. | |
1137 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1138 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1139 | recent-auto-save-p from t to nil. | |
1140 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1141 | we risk changing recent-auto-save-p from nil to t. */ | |
1142 | SAVE_MODIFF = (NILP (flag) | |
1143 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1144 | ? MODIFF | |
1145 | /* Let's try to preserve recent-auto-save-p. */ | |
1146 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1147 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1148 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1149 | or increase MODIFF. */ | |
1150 | : MODIFF++); | |
177c0ea7 | 1151 | |
8ec01c70 GM |
1152 | /* Set update_mode_lines only if buffer is displayed in some window. |
1153 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1154 | state by recording/restoring the state around blocks of code. | |
1155 | Setting update_mode_lines makes redisplay consider all windows | |
1156 | (on all frames). Stealth fontification of buffers not displayed | |
1157 | would incur additional redisplay costs if we'd set | |
1158 | update_modes_lines unconditionally. | |
1159 | ||
1160 | Ideally, I think there should be another mechanism for fontifying | |
1161 | buffers without "modifying" buffers, or redisplay should be | |
1162 | smarter about updating the `*' in mode lines. --gerd */ | |
1163 | XSETBUFFER (buffer, current_buffer); | |
1164 | window = Fget_buffer_window (buffer, Qt); | |
1165 | if (WINDOWP (window)) | |
d57b83b3 GM |
1166 | { |
1167 | ++update_mode_lines; | |
1168 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1169 | } | |
177c0ea7 | 1170 | |
1ab256cb RM |
1171 | return flag; |
1172 | } | |
1173 | ||
a8c21b48 GM |
1174 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1175 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1176 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1177 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1178 | state of the current buffer. Use with care. */) |
5842a27b | 1179 | (Lisp_Object flag) |
a8c21b48 GM |
1180 | { |
1181 | #ifdef CLASH_DETECTION | |
1182 | Lisp_Object fn; | |
177c0ea7 | 1183 | |
a8c21b48 GM |
1184 | /* If buffer becoming modified, lock the file. |
1185 | If buffer becoming unmodified, unlock the file. */ | |
1186 | ||
4b4deea2 | 1187 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1188 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1189 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1190 | { |
1191 | int already = SAVE_MODIFF < MODIFF; | |
1192 | if (!already && !NILP (flag)) | |
1193 | lock_file (fn); | |
1194 | else if (already && NILP (flag)) | |
1195 | unlock_file (fn); | |
1196 | } | |
1197 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1198 | |
a8c21b48 GM |
1199 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1200 | return flag; | |
1201 | } | |
1202 | ||
1ab256cb | 1203 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1204 | 0, 1, 0, |
7ee72033 | 1205 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1206 | Each buffer has a tick counter which is incremented each time the |
1207 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1208 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1209 | (register Lisp_Object buffer) |
1ab256cb RM |
1210 | { |
1211 | register struct buffer *buf; | |
265a9e55 | 1212 | if (NILP (buffer)) |
1ab256cb RM |
1213 | buf = current_buffer; |
1214 | else | |
1215 | { | |
b7826503 | 1216 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1217 | buf = XBUFFER (buffer); |
1218 | } | |
1219 | ||
1220 | return make_number (BUF_MODIFF (buf)); | |
1221 | } | |
3e145152 CY |
1222 | |
1223 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1224 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1225 | doc: /* Return BUFFER's character-change tick counter. | |
1226 | Each buffer has a character-change tick counter, which is set to the | |
1227 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1228 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1229 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1230 | you can tell whether a character change occurred in that buffer in |
1231 | between these calls. No argument or nil as argument means use current | |
1232 | buffer as BUFFER. */) | |
5842a27b | 1233 | (register Lisp_Object buffer) |
3e145152 CY |
1234 | { |
1235 | register struct buffer *buf; | |
1236 | if (NILP (buffer)) | |
1237 | buf = current_buffer; | |
1238 | else | |
1239 | { | |
1240 | CHECK_BUFFER (buffer); | |
1241 | buf = XBUFFER (buffer); | |
1242 | } | |
1243 | ||
1244 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1245 | } | |
1ab256cb | 1246 | \f |
01050cb5 | 1247 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1248 | "(list (read-string \"Rename buffer (to new name): \" \ |
1249 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1250 | current-prefix-arg)", | |
7ee72033 | 1251 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1252 | If second arg UNIQUE is nil or omitted, it is an error if a |
1253 | buffer named NEWNAME already exists. | |
1254 | If UNIQUE is non-nil, come up with a new name using | |
1255 | `generate-new-buffer-name'. | |
1256 | Interactively, you can set UNIQUE with a prefix argument. | |
1257 | We return the name we actually gave the buffer. | |
7ee72033 | 1258 | This does not change the name of the visited file (if any). */) |
5842a27b | 1259 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1260 | { |
1261 | register Lisp_Object tem, buf; | |
1262 | ||
b7826503 | 1263 | CHECK_STRING (newname); |
d59698c4 | 1264 | |
d5db4077 | 1265 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1266 | error ("Empty string is invalid as a buffer name"); |
1267 | ||
489c043a | 1268 | tem = Fget_buffer (newname); |
265a9e55 | 1269 | if (!NILP (tem)) |
01050cb5 | 1270 | { |
8801a864 KR |
1271 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1272 | rename the buffer automatically so you can create another | |
1273 | with the original name. It makes UNIQUE equivalent to | |
1274 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1275 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1276 | return BVAR (current_buffer, name); |
3bd779aa | 1277 | if (!NILP (unique)) |
4b4deea2 | 1278 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1279 | else |
d5db4077 | 1280 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1281 | } |
1ab256cb | 1282 | |
4b4deea2 | 1283 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1284 | |
1285 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1286 | any windows displaying current_buffer will stay unchanged. */ | |
1287 | update_mode_lines++; | |
1288 | ||
67180c6a | 1289 | XSETBUFFER (buf, current_buffer); |
489c043a | 1290 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1291 | if (NILP (BVAR (current_buffer, filename)) |
1292 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1293 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1294 | |
1295 | /* Run buffer-list-update-hook. */ | |
1296 | if (!NILP (Vrun_hooks)) | |
1297 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1298 | ||
fb5eba9c | 1299 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1300 | return BVAR (current_buffer, name); |
1ab256cb RM |
1301 | } |
1302 | ||
a7ca3326 | 1303 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1304 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1305 | Buffers not visible in windows are preferred to visible buffers, unless |
1306 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1307 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1308 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1309 | frame's buffer list. | |
1310 | ||
1311 | The buffer is found by scanning the selected or specified frame's buffer | |
1312 | list first, followed by the list of all buffers. If no other buffer | |
1313 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1314 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1315 | { |
9397e56f MR |
1316 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1317 | Lisp_Object tail, buf, pred; | |
1318 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1319 | |
773fbdb9 | 1320 | if (NILP (frame)) |
9ba9623d | 1321 | frame = selected_frame; |
773fbdb9 | 1322 | |
d234d13e JL |
1323 | CHECK_FRAME (frame); |
1324 | ||
773fbdb9 | 1325 | pred = frame_buffer_predicate (frame); |
9397e56f MR |
1326 | /* Consider buffers that have been seen in the frame first. */ |
1327 | tail = XFRAME (frame)->buffer_list; | |
1328 | for (; CONSP (tail); tail = XCDR (tail)) | |
7962a441 | 1329 | { |
9397e56f MR |
1330 | buf = XCAR (tail); |
1331 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1332 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1333 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1334 | /* If the frame has a buffer_predicate, disregard buffers that | |
1335 | don't fit the predicate. */ | |
1336 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1337 | { | |
1338 | if (!NILP (visible_ok) | |
1339 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1340 | return buf; | |
1341 | else if (NILP (notsogood)) | |
1342 | notsogood = buf; | |
1343 | } | |
7962a441 | 1344 | } |
7962a441 | 1345 | |
9397e56f MR |
1346 | /* Consider alist of all buffers next. */ |
1347 | tail = Vbuffer_alist; | |
6d70a280 | 1348 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1349 | { |
6d70a280 | 1350 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1351 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1352 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1353 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1354 | /* If the frame has a buffer_predicate, disregard buffers that | |
1355 | don't fit the predicate. */ | |
1356 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1357 | { | |
1358 | if (!NILP (visible_ok) | |
1359 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1360 | return buf; | |
1361 | else if (NILP (notsogood)) | |
1362 | notsogood = buf; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | if (!NILP (notsogood)) | |
1367 | return notsogood; | |
1368 | else | |
1369 | { | |
1370 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1371 | if (NILP (buf)) |
04ae1b48 | 1372 | { |
9397e56f MR |
1373 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1374 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1375 | } |
9397e56f MR |
1376 | return buf; |
1377 | } | |
1378 | } | |
04ae1b48 | 1379 | |
9397e56f MR |
1380 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1381 | pay attention to any frame-local buffer lists, doesn't care about | |
1382 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1383 | ||
1384 | Lisp_Object | |
1385 | other_buffer_safely (Lisp_Object buffer) | |
1386 | { | |
1387 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1388 | Lisp_Object tail, buf; | |
1389 | ||
1390 | tail = Vbuffer_alist; | |
1391 | for (; CONSP (tail); tail = XCDR (tail)) | |
1392 | { | |
1393 | buf = Fcdr (XCAR (tail)); | |
1394 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1395 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1396 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1397 | return buf; |
1ab256cb | 1398 | } |
9397e56f | 1399 | |
dba1a30a GM |
1400 | buf = Fget_buffer (build_string ("*scratch*")); |
1401 | if (NILP (buf)) | |
1402 | { | |
1403 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1404 | Fset_buffer_major_mode (buf); | |
1405 | } | |
9397e56f | 1406 | |
89132f25 | 1407 | return buf; |
1ab256cb RM |
1408 | } |
1409 | \f | |
a7ca3326 | 1410 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1411 | 0, 1, "", |
7ee72033 MB |
1412 | doc: /* Start keeping undo information for buffer BUFFER. |
1413 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1414 | (register Lisp_Object buffer) |
1ab256cb | 1415 | { |
ffd56f97 | 1416 | Lisp_Object real_buffer; |
1ab256cb | 1417 | |
ffd56f97 | 1418 | if (NILP (buffer)) |
67180c6a | 1419 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1420 | else |
1421 | { | |
ffd56f97 JB |
1422 | real_buffer = Fget_buffer (buffer); |
1423 | if (NILP (real_buffer)) | |
1424 | nsberror (buffer); | |
1ab256cb RM |
1425 | } |
1426 | ||
4b4deea2 TT |
1427 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1428 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1429 | |
1430 | return Qnil; | |
1431 | } | |
1432 | ||
1433 | /* | |
00b3c7ac | 1434 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1435 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1436 | The buffer being killed will be current while the hook is running.\n\ | |
1437 | See `kill-buffer'." | |
1438 | */ | |
a7ca3326 | 1439 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
c8804c4f MR |
1440 | doc: /* Kill buffer BUFFER-OR-NAME. |
1441 | The argument may be a buffer or the name of an existing buffer. | |
1442 | Argument nil or omitted means kill the current buffer. Return t if the | |
1443 | buffer is actually killed, nil otherwise. | |
1444 | ||
1445 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1446 | windows currently displaying the buffer to be killed. The functions in | |
1447 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1448 | the current buffer. If any of them returns nil, the buffer is not | |
1449 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1450 | actually killed. The buffer being killed will be current while the hook | |
1451 | is running. | |
018ba359 PJ |
1452 | |
1453 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1454 | with SIGHUP. */) |
5842a27b | 1455 | (Lisp_Object buffer_or_name) |
1ab256cb | 1456 | { |
c8804c4f | 1457 | Lisp_Object buffer; |
1ab256cb RM |
1458 | register struct buffer *b; |
1459 | register Lisp_Object tem; | |
1460 | register struct Lisp_Marker *m; | |
6af718a4 | 1461 | struct gcpro gcpro1; |
1ab256cb | 1462 | |
c8804c4f MR |
1463 | if (NILP (buffer_or_name)) |
1464 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1465 | else |
c8804c4f MR |
1466 | buffer = Fget_buffer (buffer_or_name); |
1467 | if (NILP (buffer)) | |
1468 | nsberror (buffer_or_name); | |
1ab256cb | 1469 | |
c8804c4f | 1470 | b = XBUFFER (buffer); |
1ab256cb | 1471 | |
4a4a9db5 | 1472 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1473 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1474 | return Qnil; |
1475 | ||
1ab256cb | 1476 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1477 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1478 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1479 | { |
c8804c4f | 1480 | GCPRO1 (buffer); |
5c4930b0 | 1481 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1482 | BVAR (b, name), make_number (0))); |
1ab256cb | 1483 | UNGCPRO; |
265a9e55 | 1484 | if (NILP (tem)) |
1ab256cb RM |
1485 | return Qnil; |
1486 | } | |
1487 | ||
dcdffbf6 | 1488 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1489 | { |
d311d28c | 1490 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1491 | Lisp_Object arglist[1]; |
1ab256cb RM |
1492 | |
1493 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1494 | set_buffer_internal (b); | |
dcdffbf6 RS |
1495 | |
1496 | /* First run the query functions; if any query is answered no, | |
1497 | don't kill the buffer. */ | |
5b20caf0 | 1498 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1499 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1500 | if (NILP (tem)) | |
5b20caf0 | 1501 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1502 | |
1503 | /* Then run the hooks. */ | |
f1597a3a | 1504 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1505 | unbind_to (count, Qnil); |
1506 | } | |
1507 | ||
1508 | /* We have no more questions to ask. Verify that it is valid | |
1509 | to kill the buffer. This must be done after the questions | |
1510 | since anything can happen within do_yes_or_no_p. */ | |
1511 | ||
1512 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1513 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1514 | return Qnil; |
1515 | ||
4b4deea2 | 1516 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1517 | return Qnil; |
1518 | ||
336cd056 RS |
1519 | /* When we kill a base buffer, kill all its indirect buffers. |
1520 | We do it at this stage so nothing terrible happens if they | |
1521 | ask questions or their hooks get errors. */ | |
1522 | if (! b->base_buffer) | |
1523 | { | |
1524 | struct buffer *other; | |
1525 | ||
c8804c4f | 1526 | GCPRO1 (buffer); |
336cd056 | 1527 | |
eab3844f | 1528 | for (other = all_buffers; other; other = other->header.next.buffer) |
4a4a9db5 KH |
1529 | /* all_buffers contains dead buffers too; |
1530 | don't re-kill them. */ | |
4b4deea2 | 1531 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1532 | { |
8f54f30a PE |
1533 | Lisp_Object buf; |
1534 | XSETBUFFER (buf, other); | |
1535 | Fkill_buffer (buf); | |
336cd056 RS |
1536 | } |
1537 | ||
1538 | UNGCPRO; | |
1539 | } | |
177c0ea7 | 1540 | |
56e2e794 MR |
1541 | /* Run replace_buffer_in_windows before making another buffer current |
1542 | since set-window-buffer-start-and-point will refuse to make another | |
1543 | buffer current if the selected window does not show the current | |
1544 | buffer. (Bug#10114) */ | |
1545 | replace_buffer_in_windows (buffer); | |
1546 | ||
1547 | /* Make this buffer not be current. | |
1ab256cb RM |
1548 | In the process, notice if this is the sole visible buffer |
1549 | and give up if so. */ | |
1550 | if (b == current_buffer) | |
1551 | { | |
c8804c4f | 1552 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1553 | Fset_buffer (tem); |
1554 | if (b == current_buffer) | |
1555 | return Qnil; | |
1556 | } | |
1557 | ||
77270fac GM |
1558 | /* Notice if the buffer to kill is the sole visible buffer |
1559 | when we're currently in the mini-buffer, and give up if so. */ | |
1560 | XSETBUFFER (tem, current_buffer); | |
1561 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1562 | { | |
c8804c4f MR |
1563 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1564 | if (EQ (buffer, tem)) | |
77270fac GM |
1565 | return Qnil; |
1566 | } | |
1567 | ||
1ab256cb RM |
1568 | /* Now there is no question: we can kill the buffer. */ |
1569 | ||
1570 | #ifdef CLASH_DETECTION | |
1571 | /* Unlock this buffer's file, if it is locked. */ | |
1572 | unlock_buffer (b); | |
1573 | #endif /* CLASH_DETECTION */ | |
1574 | ||
c8804c4f MR |
1575 | GCPRO1 (buffer); |
1576 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1577 | UNGCPRO; |
1578 | ||
1579 | /* Killing buffer processes may run sentinels which may | |
1580 | have called kill-buffer. */ | |
1581 | ||
4b4deea2 | 1582 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1583 | return Qnil; |
1584 | ||
9397e56f MR |
1585 | /* These may run Lisp code and into infinite loops (if someone |
1586 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1587 | frames_discard_buffer (buffer); |
1588 | ||
b93fb365 | 1589 | clear_charpos_cache (b); |
1ab256cb RM |
1590 | |
1591 | tem = Vinhibit_quit; | |
1592 | Vinhibit_quit = Qt; | |
9397e56f | 1593 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1594 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
9397e56f MR |
1595 | /* If replace_buffer_in_windows didn't do its job correctly fix that |
1596 | now. */ | |
1597 | replace_buffer_in_windows_safely (buffer); | |
1ab256cb RM |
1598 | Vinhibit_quit = tem; |
1599 | ||
9cf712eb RS |
1600 | /* Delete any auto-save file, if we saved it in this session. |
1601 | But not if the buffer is modified. */ | |
4b4deea2 | 1602 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1603 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1604 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1605 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1606 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1607 | { |
8f54f30a PE |
1608 | Lisp_Object delete; |
1609 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1610 | if (! NILP (delete)) | |
4b4deea2 | 1611 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1612 | } |
1613 | ||
4a4a9db5 KH |
1614 | if (b->base_buffer) |
1615 | { | |
1616 | /* Unchain all markers that belong to this indirect buffer. | |
1617 | Don't unchain the markers that belong to the base buffer | |
1618 | or its other indirect buffers. */ | |
65745fad | 1619 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1620 | { |
65745fad | 1621 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1622 | if (m->buffer == b) |
65745fad SM |
1623 | unchain_marker (m); |
1624 | m = next; | |
4a4a9db5 KH |
1625 | } |
1626 | } | |
1627 | else | |
1ab256cb | 1628 | { |
4a4a9db5 | 1629 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1630 | and leave them pointing nowhere. */ |
65745fad | 1631 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1632 | { |
65745fad | 1633 | struct Lisp_Marker *next = m->next; |
336cd056 | 1634 | m->buffer = 0; |
65745fad SM |
1635 | m->next = NULL; |
1636 | m = next; | |
336cd056 | 1637 | } |
65745fad | 1638 | BUF_MARKERS (b) = NULL; |
336cd056 | 1639 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1640 | |
1641 | /* Perhaps we should explicitly free the interval tree here... */ | |
1642 | } | |
33f7013e | 1643 | |
2f3f993b RS |
1644 | /* Reset the local variables, so that this buffer's local values |
1645 | won't be protected from GC. They would be protected | |
e4769531 | 1646 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1647 | This gets rid of them for certain. */ |
1648 | swap_out_buffer_local_variables (b); | |
13de9290 | 1649 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1650 | |
4b4deea2 | 1651 | BVAR (b, name) = Qnil; |
336cd056 | 1652 | |
9ac0d9e0 | 1653 | BLOCK_INPUT; |
336cd056 | 1654 | if (! b->base_buffer) |
b86af064 | 1655 | free_buffer_text (b); |
336cd056 | 1656 | |
28e969dd JB |
1657 | if (b->newline_cache) |
1658 | { | |
1659 | free_region_cache (b->newline_cache); | |
1660 | b->newline_cache = 0; | |
1661 | } | |
1662 | if (b->width_run_cache) | |
1663 | { | |
1664 | free_region_cache (b->width_run_cache); | |
1665 | b->width_run_cache = 0; | |
1666 | } | |
4b4deea2 | 1667 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1668 | UNBLOCK_INPUT; |
4b4deea2 | 1669 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1670 | |
9397e56f MR |
1671 | /* Run buffer-list-update-hook. */ |
1672 | if (!NILP (Vrun_hooks)) | |
1673 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1674 | ||
1ab256cb RM |
1675 | return Qt; |
1676 | } | |
1677 | \f | |
9397e56f MR |
1678 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1679 | we do this each time BUFFER is selected visibly, the more recently | |
1680 | selected buffers are always closer to the front of those lists. This | |
1681 | means that other_buffer is more likely to choose a relevant buffer. | |
1682 | ||
1683 | Note that this moves BUFFER to the front of the buffer lists of the | |
1684 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1685 | shown in the selected frame, consider the present behavior a feature. | |
1686 | `select-window' gets this right since it shows BUFFER in the selected | |
1687 | window when calling us. */ | |
1ab256cb | 1688 | |
01136e9b | 1689 | void |
9397e56f | 1690 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1691 | { |
4475bec4 | 1692 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1693 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1694 | |
9397e56f | 1695 | CHECK_BUFFER (buffer); |
1ab256cb | 1696 | |
9397e56f MR |
1697 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1698 | Don't allow quitting since this might leave the buffer list in an | |
1699 | inconsistent state. */ | |
1700 | tem = Vinhibit_quit; | |
1701 | Vinhibit_quit = Qt; | |
1702 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1703 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1704 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1705 | XSETCDR (aelt_cons, Vbuffer_alist); |
1706 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1707 | Vinhibit_quit = tem; |
1ab256cb | 1708 | |
9397e56f MR |
1709 | /* Update buffer list of selected frame. */ |
1710 | f->buffer_list = Fcons (buffer, Fdelq (buffer, f->buffer_list)); | |
1711 | f->buried_buffer_list = Fdelq (buffer, f->buried_buffer_list); | |
177c0ea7 | 1712 | |
9397e56f MR |
1713 | /* Run buffer-list-update-hook. */ |
1714 | if (!NILP (Vrun_hooks)) | |
1715 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1716 | } | |
7962a441 | 1717 | |
7962a441 | 1718 | |
e4ed06f1 CY |
1719 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1720 | buffer is killed. For the selected frame's buffer list this moves | |
1721 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 1722 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 1723 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 1724 | |
e4ed06f1 CY |
1725 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1726 | 1, 1, 0, | |
1727 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1728 | (Lisp_Object buffer) |
1729 | { | |
4475bec4 | 1730 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1731 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1732 | |
9397e56f | 1733 | CHECK_BUFFER (buffer); |
177c0ea7 | 1734 | |
9397e56f MR |
1735 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1736 | Don't allow quitting since this might leave the buffer list in an | |
1737 | inconsistent state. */ | |
1738 | tem = Vinhibit_quit; | |
1739 | Vinhibit_quit = Qt; | |
1740 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1741 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1742 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1743 | XSETCDR (aelt_cons, Qnil); |
1744 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1745 | Vinhibit_quit = tem; |
1746 | ||
1747 | /* Update buffer lists of selected frame. */ | |
1748 | f->buffer_list = Fdelq (buffer, f->buffer_list); | |
1749 | f->buried_buffer_list = Fcons (buffer, Fdelq (buffer, f->buried_buffer_list)); | |
1750 | ||
1751 | /* Run buffer-list-update-hook. */ | |
1752 | if (!NILP (Vrun_hooks)) | |
1753 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1754 | ||
e4ed06f1 | 1755 | return Qnil; |
1ab256cb RM |
1756 | } |
1757 | ||
a9ee7a59 | 1758 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1759 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1760 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1761 | according to `default-major-mode'. |
018ba359 | 1762 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1763 | the current buffer's major mode. */) |
5842a27b | 1764 | (Lisp_Object buffer) |
a9ee7a59 | 1765 | { |
d311d28c | 1766 | ptrdiff_t count; |
a9ee7a59 KH |
1767 | Lisp_Object function; |
1768 | ||
ea4fddd8 JB |
1769 | CHECK_BUFFER (buffer); |
1770 | ||
4b4deea2 TT |
1771 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1772 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1773 | function = find_symbol_value (intern ("initial-major-mode")); |
1774 | else | |
1775 | { | |
4b4deea2 | 1776 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1777 | if (NILP (function) |
4b4deea2 TT |
1778 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1779 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1780 | } |
177c0ea7 | 1781 | |
48265e61 DL |
1782 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1783 | return Qnil; | |
1784 | ||
aed13378 | 1785 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1786 | |
48265e61 DL |
1787 | /* To select a nonfundamental mode, |
1788 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1789 | |
1790 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1791 | ||
a2428fa2 | 1792 | Fset_buffer (buffer); |
48265e61 | 1793 | call0 (function); |
a9ee7a59 KH |
1794 | |
1795 | return unbind_to (count, Qnil); | |
1796 | } | |
1797 | ||
a7ca3326 | 1798 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1799 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1800 | (void) |
1ab256cb RM |
1801 | { |
1802 | register Lisp_Object buf; | |
67180c6a | 1803 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1804 | return buf; |
1805 | } | |
1806 | \f | |
7ec44ec6 GM |
1807 | /* Set the current buffer to B. |
1808 | ||
1809 | We previously set windows_or_buffers_changed here to invalidate | |
1810 | global unchanged information in beg_unchanged and end_unchanged. | |
1811 | This is no longer necessary because we now compute unchanged | |
1812 | information on a buffer-basis. Every action affecting other | |
1813 | windows than the selected one requires a select_window at some | |
1814 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1815 | |
1816 | void | |
d3da34e0 | 1817 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1818 | { |
b5a225b4 | 1819 | if (current_buffer != b) |
7ec44ec6 | 1820 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1821 | } |
1822 | ||
1823 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1824 | This is used by redisplay. */ | |
1825 | ||
1826 | void | |
d3da34e0 | 1827 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1828 | { |
1829 | register struct buffer *old_buf; | |
ce5b453a | 1830 | register Lisp_Object tail; |
c7aa5005 | 1831 | |
b86af064 | 1832 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1833 | if (b->text->beg == NULL) |
b86af064 GM |
1834 | enlarge_buffer_text (b, 0); |
1835 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1836 | |
c7aa5005 KH |
1837 | if (current_buffer == b) |
1838 | return; | |
1839 | ||
1ab256cb RM |
1840 | old_buf = current_buffer; |
1841 | current_buffer = b; | |
1842 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1843 | ||
336cd056 RS |
1844 | if (old_buf) |
1845 | { | |
1846 | /* Put the undo list back in the base buffer, so that it appears | |
1847 | that an indirect buffer shares the undo list of its base. */ | |
1848 | if (old_buf->base_buffer) | |
4b4deea2 | 1849 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1850 | |
1851 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1852 | when it is not current, update them now. */ | |
cffc6f3b | 1853 | record_buffer_markers (old_buf); |
336cd056 RS |
1854 | } |
1855 | ||
1856 | /* Get the undo list from the base buffer, so that it appears | |
1857 | that an indirect buffer shares the undo list of its base. */ | |
1858 | if (b->base_buffer) | |
4b4deea2 | 1859 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1860 | |
1861 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1862 | when it is not current, fetch them now. */ | |
cffc6f3b | 1863 | fetch_buffer_markers (b); |
336cd056 | 1864 | |
1ab256cb RM |
1865 | /* Look down buffer's list of local Lisp variables |
1866 | to find and update any that forward into C variables. */ | |
1867 | ||
ce5b453a | 1868 | do |
1ab256cb | 1869 | { |
4b4deea2 | 1870 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1871 | { |
1872 | Lisp_Object var = XCAR (XCAR (tail)); | |
1873 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1874 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1875 | && SYMBOL_BLV (sym)->fwd) | |
1876 | /* Just reference the variable | |
1877 | to cause it to become set for this buffer. */ | |
1878 | Fsymbol_value (var); | |
1879 | } | |
1ab256cb | 1880 | } |
1ab256cb | 1881 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1882 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1883 | } |
1884 | ||
336cd056 | 1885 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1886 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1887 | |
1888 | void | |
d3da34e0 | 1889 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1890 | { |
1891 | register struct buffer *old_buf; | |
1892 | ||
1893 | if (current_buffer == b) | |
1894 | return; | |
1895 | ||
1896 | old_buf = current_buffer; | |
1897 | current_buffer = b; | |
1898 | ||
cffc6f3b CY |
1899 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1900 | when it is not current, update them now. */ | |
1901 | record_buffer_markers (old_buf); | |
336cd056 RS |
1902 | |
1903 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1904 | when it is not current, fetch them now. */ | |
cffc6f3b | 1905 | fetch_buffer_markers (b); |
336cd056 RS |
1906 | } |
1907 | ||
a7ca3326 | 1908 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1909 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1910 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1911 | also `save-excursion' when you want to make a buffer current | |
1912 | temporarily. This function does not display the buffer, so its effect | |
1913 | ends when the current command terminates. Use `switch-to-buffer' or | |
1914 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1915 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1916 | { |
c8804c4f MR |
1917 | register Lisp_Object buffer; |
1918 | buffer = Fget_buffer (buffer_or_name); | |
1919 | if (NILP (buffer)) | |
1920 | nsberror (buffer_or_name); | |
4b4deea2 | 1921 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1922 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1923 | set_buffer_internal (XBUFFER (buffer)); |
1924 | return buffer; | |
1ab256cb | 1925 | } |
d0628b06 RS |
1926 | |
1927 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1928 | ||
1929 | Lisp_Object | |
d3da34e0 | 1930 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1931 | { |
4b4deea2 | 1932 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1933 | Fset_buffer (buffer); |
1934 | return Qnil; | |
1935 | } | |
1ab256cb | 1936 | \f |
a7ca3326 | 1937 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1938 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1939 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1940 | (void) |
1ab256cb | 1941 | { |
4b4deea2 | 1942 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1943 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1944 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1945 | return Qnil; |
1946 | } | |
1ab256cb | 1947 | \f |
a7ca3326 | 1948 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1949 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1950 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 1951 | so the buffer is truly empty after this. */) |
5842a27b | 1952 | (void) |
1ab256cb RM |
1953 | { |
1954 | Fwiden (); | |
c0d9a0c3 GM |
1955 | |
1956 | del_range (BEG, Z); | |
c280bc6a | 1957 | |
1ab256cb RM |
1958 | current_buffer->last_window_start = 1; |
1959 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1960 | if future size is less than past size. Use of erase-buffer | |
1961 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 1962 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
1963 | return Qnil; |
1964 | } | |
1965 | ||
01136e9b | 1966 | void |
d3da34e0 | 1967 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 1968 | { |
b7826503 PJ |
1969 | CHECK_NUMBER_COERCE_MARKER (*b); |
1970 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1971 | |
1972 | if (XINT (*b) > XINT (*e)) | |
1973 | { | |
03192067 KH |
1974 | Lisp_Object tem; |
1975 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1976 | } |
1977 | ||
d311d28c | 1978 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
1979 | args_out_of_range (*b, *e); |
1980 | } | |
1981 | \f | |
b05525fa RS |
1982 | /* Advance BYTE_POS up to a character boundary |
1983 | and return the adjusted position. */ | |
1984 | ||
d311d28c PE |
1985 | static ptrdiff_t |
1986 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 1987 | { |
f8449323 | 1988 | int c; |
b05525fa | 1989 | |
f8449323 RS |
1990 | if (byte_pos == BEG) |
1991 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 1992 | return BEG; |
f8449323 RS |
1993 | |
1994 | c = FETCH_BYTE (byte_pos); | |
1995 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1996 | { |
1be6387d | 1997 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 1998 | multibyte sequence. */ |
d311d28c | 1999 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2000 | |
2001 | do | |
2002 | { | |
2003 | byte_pos--; | |
2004 | c = FETCH_BYTE (byte_pos); | |
2005 | } | |
2006 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2007 | INC_POS (byte_pos); |
a9bcded1 KH |
2008 | if (byte_pos < orig_byte_pos) |
2009 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2010 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2011 | surely advance to the correct character boundary. If C is | |
2012 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2013 | } |
2014 | ||
20773569 | 2015 | return byte_pos; |
b05525fa RS |
2016 | } |
2017 | ||
13cda5f9 SM |
2018 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2019 | 1, 1, 0, | |
2020 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2021 | (Lisp_Object buffer) |
13cda5f9 SM |
2022 | { |
2023 | struct buffer *other_buffer; | |
2024 | CHECK_BUFFER (buffer); | |
2025 | other_buffer = XBUFFER (buffer); | |
2026 | ||
4b4deea2 | 2027 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2028 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2029 | |
13cda5f9 SM |
2030 | /* Actually, it probably works just fine. |
2031 | * if (other_buffer == current_buffer) | |
2032 | * error ("Cannot swap a buffer's text with itself"); */ | |
2033 | ||
2034 | /* Actually, this may be workable as well, tho probably only if they're | |
2035 | *both* indirect. */ | |
2036 | if (other_buffer->base_buffer | |
2037 | || current_buffer->base_buffer) | |
2038 | error ("Cannot swap indirect buffers's text"); | |
2039 | ||
2040 | { /* This is probably harder to make work. */ | |
2041 | struct buffer *other; | |
eab3844f | 2042 | for (other = all_buffers; other; other = other->header.next.buffer) |
13cda5f9 SM |
2043 | if (other->base_buffer == other_buffer |
2044 | || other->base_buffer == current_buffer) | |
2045 | error ("One of the buffers to swap has indirect buffers"); | |
2046 | } | |
2047 | ||
2048 | #define swapfield(field, type) \ | |
2049 | do { \ | |
2050 | type tmp##field = other_buffer->field; \ | |
2051 | other_buffer->field = current_buffer->field; \ | |
2052 | current_buffer->field = tmp##field; \ | |
2053 | } while (0) | |
5d8ea120 TT |
2054 | #define swapfield_(field, type) \ |
2055 | do { \ | |
4b4deea2 TT |
2056 | type tmp##field = BVAR (other_buffer, field); \ |
2057 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2058 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2059 | } while (0) |
13cda5f9 SM |
2060 | |
2061 | swapfield (own_text, struct buffer_text); | |
2062 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2063 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2064 | #ifdef REL_ALLOC |
261cb4bb PE |
2065 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2066 | (void **) &other_buffer->own_text.beg); | |
2067 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2068 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2069 | #endif /* REL_ALLOC */ |
2070 | ||
d311d28c PE |
2071 | swapfield (pt, ptrdiff_t); |
2072 | swapfield (pt_byte, ptrdiff_t); | |
2073 | swapfield (begv, ptrdiff_t); | |
2074 | swapfield (begv_byte, ptrdiff_t); | |
2075 | swapfield (zv, ptrdiff_t); | |
2076 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2077 | eassert (!current_buffer->base_buffer); |
2078 | eassert (!other_buffer->base_buffer); | |
2079 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2080 | swapfield (newline_cache, struct region_cache *); | |
2081 | swapfield (width_run_cache, struct region_cache *); | |
2082 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2083 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2084 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2085 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2086 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2087 | swapfield_ (undo_list, Lisp_Object); |
2088 | swapfield_ (mark, Lisp_Object); | |
2089 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2090 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2091 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2092 | /* FIXME: Not sure what we should do with these *_marker fields. |
2093 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2094 | swapfield_ (pt_marker, Lisp_Object); |
2095 | swapfield_ (begv_marker, Lisp_Object); | |
2096 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2097 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2098 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2099 | |
2100 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2101 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2102 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2103 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2104 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2105 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2106 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2107 | { |
2108 | struct Lisp_Marker *m; | |
2109 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2110 | if (m->buffer == other_buffer) | |
2111 | m->buffer = current_buffer; | |
b8ff72fa SM |
2112 | else |
2113 | /* Since there's no indirect buffer in sight, markers on | |
2114 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2115 | eassert (!m->buffer); | |
13cda5f9 SM |
2116 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2117 | if (m->buffer == current_buffer) | |
2118 | m->buffer = other_buffer; | |
b8ff72fa SM |
2119 | else |
2120 | /* Since there's no indirect buffer in sight, markers on | |
2121 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2122 | eassert (!m->buffer); | |
13cda5f9 | 2123 | } |
126f1fc1 SM |
2124 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2125 | So since we just swapped the markers between the two buffers, we need | |
2126 | to undo the effect of this swap for window markers. */ | |
2127 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2128 | Lisp_Object buf1, buf2; | |
2129 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2130 | ||
2131 | while (NILP (Fmemq (w, ws))) | |
2132 | { | |
2133 | ws = Fcons (w, ws); | |
2134 | if (MARKERP (XWINDOW (w)->pointm) | |
2135 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2136 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2137 | Fset_marker (XWINDOW (w)->pointm, | |
2138 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2139 | XWINDOW (w)->buffer); | |
2140 | w = Fnext_window (w, Qt, Qt); | |
2141 | } | |
2142 | } | |
2143 | ||
13cda5f9 SM |
2144 | if (current_buffer->text->intervals) |
2145 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2146 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2147 | if (other_buffer->text->intervals) | |
2148 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2149 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2150 | ||
2151 | return Qnil; | |
2152 | } | |
2153 | ||
a7ca3326 | 2154 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2155 | 1, 1, 0, |
7ee72033 | 2156 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2157 | If FLAG is t, this makes the buffer a multibyte buffer. |
2158 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2159 | In these cases, the buffer contents remain unchanged as a sequence of |
2160 | bytes but the contents viewed as characters do change. | |
2161 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2162 | all eight-bit bytes to eight-bit characters. |
2163 | If the multibyte flag was really changed, undo information of the | |
2164 | current buffer is cleared. */) | |
5842a27b | 2165 | (Lisp_Object flag) |
3ac81adb | 2166 | { |
65745fad | 2167 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2168 | struct buffer *other; |
d311d28c | 2169 | ptrdiff_t begv, zv; |
8d1203ea | 2170 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2171 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2172 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2173 | struct gcpro gcpro1; |
3ac81adb | 2174 | |
6e553d5e RS |
2175 | if (current_buffer->base_buffer) |
2176 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2177 | ||
70e77119 | 2178 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2179 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2180 | return flag; |
2181 | ||
38babc07 KS |
2182 | GCPRO1 (old_undo); |
2183 | ||
2184 | /* Don't record these buffer changes. We will put a special undo entry | |
2185 | instead. */ | |
4b4deea2 | 2186 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2187 | |
3ac81adb RS |
2188 | /* If the cached position is for this buffer, clear it out. */ |
2189 | clear_charpos_cache (current_buffer); | |
2190 | ||
458c8af4 KH |
2191 | if (NILP (flag)) |
2192 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2193 | else | |
2194 | begv = BEGV, zv = ZV; | |
2195 | ||
a9bcded1 KH |
2196 | if (narrowed) |
2197 | Fwiden (); | |
2198 | ||
3ac81adb RS |
2199 | if (NILP (flag)) |
2200 | { | |
d311d28c | 2201 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2202 | unsigned char *p; |
2203 | ||
3ac81adb RS |
2204 | /* Do this first, so it can use CHAR_TO_BYTE |
2205 | to calculate the old correspondences. */ | |
2206 | set_intervals_multibyte (0); | |
2207 | ||
4b4deea2 | 2208 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2209 | |
2210 | Z = Z_BYTE; | |
2211 | BEGV = BEGV_BYTE; | |
2212 | ZV = ZV_BYTE; | |
2213 | GPT = GPT_BYTE; | |
2214 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2215 | ||
60ebfdf3 | 2216 | |
65745fad SM |
2217 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2218 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2219 | |
2220 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2221 | pos = BEG; | |
2222 | stop = GPT; | |
2223 | p = BEG_ADDR; | |
2224 | while (1) | |
2225 | { | |
2226 | int c, bytes; | |
2227 | ||
2228 | if (pos == stop) | |
2229 | { | |
2230 | if (pos == Z) | |
2231 | break; | |
2232 | p = GAP_END_ADDR; | |
2233 | stop = Z; | |
2234 | } | |
8f348ed5 KH |
2235 | if (ASCII_BYTE_P (*p)) |
2236 | p++, pos++; | |
2237 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2238 | { |
62a6e103 | 2239 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2240 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2241 | last one, and change the last one to the character |
a9bcded1 KH |
2242 | code. */ |
2243 | bytes--; | |
2244 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2245 | p = GAP_END_ADDR; | |
2246 | *p++ = c; | |
2247 | pos++; | |
2248 | if (begv > pos) | |
2249 | begv -= bytes; | |
2250 | if (zv > pos) | |
2251 | zv -= bytes; | |
2252 | stop = Z; | |
2253 | } | |
8f924df7 | 2254 | else |
8f348ed5 KH |
2255 | { |
2256 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2257 | p += bytes, pos += bytes; | |
2258 | } | |
a9bcded1 KH |
2259 | } |
2260 | if (narrowed) | |
2261 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2262 | } |
2263 | else | |
2264 | { | |
d311d28c PE |
2265 | ptrdiff_t pt = PT; |
2266 | ptrdiff_t pos, stop; | |
8f348ed5 | 2267 | unsigned char *p, *pend; |
a9bcded1 | 2268 | |
673c57d2 | 2269 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2270 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2271 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2272 | |
8f924df7 | 2273 | if (EQ (flag, Qt) |
a3a303df | 2274 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2275 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2276 | { | |
8f54f30a | 2277 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2278 | |
8f54f30a PE |
2279 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2280 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2281 | { |
d311d28c | 2282 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2283 | |
2284 | move_gap_both (new_gpt, new_gpt); | |
2285 | } | |
2286 | } | |
2287 | ||
a9bcded1 KH |
2288 | /* Make the buffer contents valid as multibyte by converting |
2289 | 8-bit characters to multibyte form. */ | |
2290 | pos = BEG; | |
2291 | stop = GPT; | |
2292 | p = BEG_ADDR; | |
8f348ed5 | 2293 | pend = GPT_ADDR; |
a9bcded1 KH |
2294 | while (1) |
2295 | { | |
2296 | int bytes; | |
2297 | ||
2298 | if (pos == stop) | |
2299 | { | |
2300 | if (pos == Z) | |
2301 | break; | |
2302 | p = GAP_END_ADDR; | |
8f348ed5 | 2303 | pend = Z_ADDR; |
a9bcded1 KH |
2304 | stop = Z; |
2305 | } | |
177c0ea7 | 2306 | |
a3a303df KH |
2307 | if (ASCII_BYTE_P (*p)) |
2308 | p++, pos++; | |
dcfb9bc4 KH |
2309 | else if (EQ (flag, Qt) |
2310 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2311 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2312 | p += bytes, pos += bytes; |
2313 | else | |
2314 | { | |
2315 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2316 | int c; |
a9bcded1 | 2317 | |
8f924df7 | 2318 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2319 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2320 | *p = tmp[0]; |
2321 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2322 | bytes--; | |
b68864e5 | 2323 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2324 | /* Now the gap is after the just inserted data. */ |
2325 | pos = GPT; | |
2326 | p = GAP_END_ADDR; | |
2327 | if (pos <= begv) | |
2328 | begv += bytes; | |
2329 | if (pos <= zv) | |
2330 | zv += bytes; | |
2331 | if (pos <= pt) | |
2332 | pt += bytes; | |
31285a8f | 2333 | pend = Z_ADDR; |
a9bcded1 KH |
2334 | stop = Z; |
2335 | } | |
2336 | } | |
2337 | ||
2338 | if (pt != PT) | |
2339 | TEMP_SET_PT (pt); | |
2340 | ||
2341 | if (narrowed) | |
2342 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2343 | ||
3ac81adb RS |
2344 | /* Do this first, so that chars_in_text asks the right question. |
2345 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2346 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2347 | |
b05525fa | 2348 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2349 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2350 | |
673c57d2 | 2351 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2352 | |
2353 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2354 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2355 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2356 | else |
2357 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2358 | |
2359 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2360 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2361 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2362 | else |
2363 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2364 | |
2365 | { | |
d311d28c PE |
2366 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2367 | ptrdiff_t position; | |
b05525fa | 2368 | |
8f54f30a PE |
2369 | if (byte > GPT_BYTE) |
2370 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2371 | else |
8f54f30a PE |
2372 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2373 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2374 | } |
3ac81adb RS |
2375 | |
2376 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2377 | |
2378 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2379 | getting confused by the markers that have not yet been updated. | |
2380 | It is also a signal that it should never create a marker. */ | |
65745fad | 2381 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2382 | |
65745fad | 2383 | for (; tail; tail = tail->next) |
3ac81adb | 2384 | { |
65745fad SM |
2385 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2386 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2387 | } |
b69f9797 RS |
2388 | |
2389 | /* Make sure no markers were put on the chain | |
2390 | while the chain value was incorrect. */ | |
65745fad | 2391 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2392 | abort (); |
2393 | ||
3ac81adb RS |
2394 | BUF_MARKERS (current_buffer) = markers; |
2395 | ||
2396 | /* Do this last, so it can calculate the new correspondences | |
2397 | between chars and bytes. */ | |
2398 | set_intervals_multibyte (1); | |
2399 | } | |
2400 | ||
38babc07 KS |
2401 | if (!EQ (old_undo, Qt)) |
2402 | { | |
2403 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2404 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2405 | intern ("set-buffer-multibyte"), |
2406 | NILP (flag) ? Qt : Qnil), | |
2407 | old_undo); | |
38babc07 KS |
2408 | } |
2409 | ||
2410 | UNGCPRO; | |
a9bcded1 | 2411 | |
724b203f GM |
2412 | /* Changing the multibyteness of a buffer means that all windows |
2413 | showing that buffer must be updated thoroughly. */ | |
2414 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2415 | ++windows_or_buffers_changed; | |
2416 | ||
abc9d959 RS |
2417 | /* Copy this buffer's new multibyte status |
2418 | into all of its indirect buffers. */ | |
eab3844f | 2419 | for (other = all_buffers; other; other = other->header.next.buffer) |
4b4deea2 | 2420 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2421 | { |
4b4deea2 TT |
2422 | BVAR (other, enable_multibyte_characters) |
2423 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2424 | other->prevent_redisplay_optimizations_p = 1; |
2425 | } | |
abc9d959 | 2426 | |
ed00559d KH |
2427 | /* Restore the modifiedness of the buffer. */ |
2428 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2429 | Fset_buffer_modified_p (Qnil); | |
2430 | ||
172f9454 KH |
2431 | /* Update coding systems of this buffer's process (if any). */ |
2432 | { | |
2433 | Lisp_Object process; | |
2434 | ||
2435 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2436 | if (PROCESSP (process)) | |
2437 | setup_process_coding_systems (process); | |
2438 | } | |
2439 | ||
3ac81adb RS |
2440 | return flag; |
2441 | } | |
2442 | \f | |
a7ca3326 | 2443 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2444 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2445 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2446 | Most local variable bindings are eliminated so that the default values |
2447 | become effective once more. Also, the syntax table is set from | |
2448 | `standard-syntax-table', the local keymap is set to nil, | |
2449 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2450 | This function also forces redisplay of the mode line. | |
2451 | ||
2452 | Every function to select a new major mode starts by | |
2453 | calling this function. | |
2454 | ||
2455 | As a special exception, local variables whose names have | |
2456 | a non-nil `permanent-local' property are not eliminated by this function. | |
2457 | ||
2458 | The first thing this function does is run | |
7ee72033 | 2459 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2460 | (void) |
1ab256cb | 2461 | { |
dee091a3 | 2462 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2463 | |
3709505e | 2464 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2465 | remain swapped in, in their symbols. */ |
1ab256cb | 2466 | |
2f3f993b | 2467 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2468 | |
2469 | /* Actually eliminate all local bindings of this buffer. */ | |
2470 | ||
13de9290 | 2471 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2472 | |
1ab256cb RM |
2473 | /* Force mode-line redisplay. Useful here because all major mode |
2474 | commands call this function. */ | |
2475 | update_mode_lines++; | |
2476 | ||
2477 | return Qnil; | |
2478 | } | |
2f3f993b RS |
2479 | |
2480 | /* Make sure no local variables remain set up with buffer B | |
2481 | for their current values. */ | |
2482 | ||
2483 | static void | |
d3da34e0 | 2484 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2485 | { |
ce5b453a | 2486 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2487 | |
2488 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2489 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2490 | |
67ee9f6e | 2491 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2492 | { |
ce5b453a SM |
2493 | Lisp_Object sym = XCAR (XCAR (alist)); |
2494 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2495 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2496 | now cached. */ |
ce5b453a | 2497 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2498 | { |
e7c10f83 SM |
2499 | /* Symbol is set up for this buffer's old local value: |
2500 | swap it out! */ | |
ce5b453a | 2501 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2502 | } |
2503 | } | |
2504 | } | |
1ab256cb | 2505 | \f |
2eec3b4e | 2506 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2507 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2508 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2509 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2510 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2511 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2512 | or where an overlay starts which ends at or after POS; |
624d2678 | 2513 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2514 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2515 | |
2516 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2517 | when this function is called. |
2518 | ||
2519 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2520 | If EXTEND is zero, we never extend the vector, | |
2521 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2522 | But we still return the total number of overlays. |
2523 | ||
2524 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2525 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2526 | default (BEGV or ZV). */ | |
2eec3b4e | 2527 | |
b081724f PE |
2528 | ptrdiff_t |
2529 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2530 | ptrdiff_t *len_ptr, | |
d311d28c | 2531 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, int change_req) |
1ab256cb | 2532 | { |
2410d73a SM |
2533 | Lisp_Object overlay, start, end; |
2534 | struct Lisp_Overlay *tail; | |
b081724f PE |
2535 | ptrdiff_t idx = 0; |
2536 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2537 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2538 | ptrdiff_t next = ZV; |
2539 | ptrdiff_t prev = BEGV; | |
61d54cd5 RS |
2540 | int inhibit_storing = 0; |
2541 | ||
2410d73a | 2542 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2543 | { |
d311d28c | 2544 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2545 | |
2410d73a | 2546 | XSETMISC (overlay, tail); |
1ab256cb | 2547 | |
2eec3b4e RS |
2548 | start = OVERLAY_START (overlay); |
2549 | end = OVERLAY_END (overlay); | |
239c932b RS |
2550 | endpos = OVERLAY_POSITION (end); |
2551 | if (endpos < pos) | |
2552 | { | |
2553 | if (prev < endpos) | |
2554 | prev = endpos; | |
2555 | break; | |
2556 | } | |
413e06a4 RS |
2557 | startpos = OVERLAY_POSITION (start); |
2558 | /* This one ends at or after POS | |
daa1c109 | 2559 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2560 | if (prev < startpos && startpos < pos) |
2561 | prev = startpos; | |
239c932b RS |
2562 | if (endpos == pos) |
2563 | continue; | |
2eec3b4e RS |
2564 | if (startpos <= pos) |
2565 | { | |
2566 | if (idx == len) | |
2567 | { | |
61d54cd5 RS |
2568 | /* The supplied vector is full. |
2569 | Either make it bigger, or don't store any more in it. */ | |
2570 | if (extend) | |
2571 | { | |
0065d054 PE |
2572 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2573 | sizeof *vec); | |
61d54cd5 | 2574 | *vec_ptr = vec; |
0065d054 | 2575 | len = *len_ptr; |
61d54cd5 RS |
2576 | } |
2577 | else | |
2578 | inhibit_storing = 1; | |
2eec3b4e | 2579 | } |
61d54cd5 RS |
2580 | |
2581 | if (!inhibit_storing) | |
2582 | vec[idx] = overlay; | |
2583 | /* Keep counting overlays even if we can't return them all. */ | |
2584 | idx++; | |
2eec3b4e RS |
2585 | } |
2586 | else if (startpos < next) | |
2587 | next = startpos; | |
2588 | } | |
2589 | ||
2410d73a | 2590 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2591 | { |
d311d28c | 2592 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2593 | |
2410d73a | 2594 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2595 | |
2596 | start = OVERLAY_START (overlay); | |
2597 | end = OVERLAY_END (overlay); | |
2598 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2599 | if (pos < startpos) |
2eec3b4e RS |
2600 | { |
2601 | if (startpos < next) | |
2602 | next = startpos; | |
2603 | break; | |
2604 | } | |
239c932b RS |
2605 | endpos = OVERLAY_POSITION (end); |
2606 | if (pos < endpos) | |
2eec3b4e RS |
2607 | { |
2608 | if (idx == len) | |
2609 | { | |
61d54cd5 RS |
2610 | if (extend) |
2611 | { | |
0065d054 PE |
2612 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2613 | sizeof *vec); | |
61d54cd5 | 2614 | *vec_ptr = vec; |
0065d054 | 2615 | len = *len_ptr; |
61d54cd5 RS |
2616 | } |
2617 | else | |
2618 | inhibit_storing = 1; | |
2eec3b4e | 2619 | } |
61d54cd5 RS |
2620 | |
2621 | if (!inhibit_storing) | |
2622 | vec[idx] = overlay; | |
2623 | idx++; | |
413e06a4 RS |
2624 | |
2625 | if (startpos < pos && startpos > prev) | |
2626 | prev = startpos; | |
2eec3b4e | 2627 | } |
239c932b RS |
2628 | else if (endpos < pos && endpos > prev) |
2629 | prev = endpos; | |
1d5f4c1d MB |
2630 | else if (endpos == pos && startpos > prev |
2631 | && (!change_req || startpos < pos)) | |
413e06a4 | 2632 | prev = startpos; |
1ab256cb RM |
2633 | } |
2634 | ||
239c932b RS |
2635 | if (next_ptr) |
2636 | *next_ptr = next; | |
2637 | if (prev_ptr) | |
2638 | *prev_ptr = prev; | |
2eec3b4e RS |
2639 | return idx; |
2640 | } | |
74514898 | 2641 | \f |
7723e095 MR |
2642 | /* Find all the overlays in the current buffer that overlap the range |
2643 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2644 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2645 | |
177c0ea7 | 2646 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2647 | Store in *LEN_PTR the size allocated for the vector. |
2648 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2649 | or ZV if there are no more overlays. | |
2650 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2651 | or BEGV if there are no previous overlays. | |
2652 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2653 | ||
2654 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2655 | when this function is called. | |
2656 | ||
2657 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2658 | If EXTEND is zero, we never extend the vector, | |
2659 | and we store only as many overlays as will fit. | |
2660 | But we still return the total number of overlays. */ | |
2661 | ||
21514da7 | 2662 | static ptrdiff_t |
145582a0 | 2663 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2664 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2665 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2666 | { |
2410d73a SM |
2667 | Lisp_Object overlay, ostart, oend; |
2668 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2669 | ptrdiff_t idx = 0; |
2670 | ptrdiff_t len = *len_ptr; | |
74514898 | 2671 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2672 | ptrdiff_t next = ZV; |
2673 | ptrdiff_t prev = BEGV; | |
74514898 | 2674 | int inhibit_storing = 0; |
7723e095 | 2675 | int end_is_Z = end == Z; |
74514898 | 2676 | |
2410d73a | 2677 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2678 | { |
d311d28c | 2679 | ptrdiff_t startpos, endpos; |
74514898 | 2680 | |
2410d73a | 2681 | XSETMISC (overlay, tail); |
74514898 RS |
2682 | |
2683 | ostart = OVERLAY_START (overlay); | |
2684 | oend = OVERLAY_END (overlay); | |
2685 | endpos = OVERLAY_POSITION (oend); | |
2686 | if (endpos < beg) | |
2687 | { | |
2688 | if (prev < endpos) | |
2689 | prev = endpos; | |
2690 | break; | |
2691 | } | |
2692 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2693 | /* Count an interval if it overlaps the range, is empty at the |
2694 | start of the range, or is empty at END provided END denotes the | |
2695 | end of the buffer. */ | |
74514898 | 2696 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2697 | || (startpos == endpos |
2698 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2699 | { |
2700 | if (idx == len) | |
2701 | { | |
2702 | /* The supplied vector is full. | |
2703 | Either make it bigger, or don't store any more in it. */ | |
2704 | if (extend) | |
2705 | { | |
0065d054 PE |
2706 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2707 | sizeof *vec); | |
74514898 | 2708 | *vec_ptr = vec; |
0065d054 | 2709 | len = *len_ptr; |
74514898 RS |
2710 | } |
2711 | else | |
2712 | inhibit_storing = 1; | |
2713 | } | |
2714 | ||
2715 | if (!inhibit_storing) | |
2716 | vec[idx] = overlay; | |
2717 | /* Keep counting overlays even if we can't return them all. */ | |
2718 | idx++; | |
2719 | } | |
2720 | else if (startpos < next) | |
2721 | next = startpos; | |
2722 | } | |
2723 | ||
2410d73a | 2724 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2725 | { |
d311d28c | 2726 | ptrdiff_t startpos, endpos; |
74514898 | 2727 | |
2410d73a | 2728 | XSETMISC (overlay, tail); |
74514898 RS |
2729 | |
2730 | ostart = OVERLAY_START (overlay); | |
2731 | oend = OVERLAY_END (overlay); | |
2732 | startpos = OVERLAY_POSITION (ostart); | |
2733 | if (end < startpos) | |
2734 | { | |
2735 | if (startpos < next) | |
2736 | next = startpos; | |
2737 | break; | |
2738 | } | |
2739 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2740 | /* Count an interval if it overlaps the range, is empty at the |
2741 | start of the range, or is empty at END provided END denotes the | |
2742 | end of the buffer. */ | |
74514898 | 2743 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2744 | || (startpos == endpos |
2745 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2746 | { |
2747 | if (idx == len) | |
2748 | { | |
2749 | if (extend) | |
2750 | { | |
0065d054 PE |
2751 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2752 | sizeof *vec); | |
74514898 | 2753 | *vec_ptr = vec; |
0065d054 | 2754 | len = *len_ptr; |
74514898 RS |
2755 | } |
2756 | else | |
2757 | inhibit_storing = 1; | |
2758 | } | |
2759 | ||
2760 | if (!inhibit_storing) | |
2761 | vec[idx] = overlay; | |
2762 | idx++; | |
2763 | } | |
2764 | else if (endpos < beg && endpos > prev) | |
2765 | prev = endpos; | |
2766 | } | |
fc04fa47 | 2767 | |
74514898 RS |
2768 | if (next_ptr) |
2769 | *next_ptr = next; | |
2770 | if (prev_ptr) | |
2771 | *prev_ptr = prev; | |
2772 | return idx; | |
2773 | } | |
09a22085 GM |
2774 | |
2775 | ||
2776 | /* Return non-zero if there exists an overlay with a non-nil | |
2777 | `mouse-face' property overlapping OVERLAY. */ | |
2778 | ||
2779 | int | |
d3da34e0 | 2780 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2781 | { |
d311d28c PE |
2782 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2783 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2784 | ptrdiff_t n, i, size; |
09a22085 | 2785 | Lisp_Object *v, tem; |
177c0ea7 | 2786 | |
bfd8410f GM |
2787 | size = 10; |
2788 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2789 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2790 | if (n > size) | |
09a22085 | 2791 | { |
09a22085 GM |
2792 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2793 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2794 | } | |
2795 | ||
2796 | for (i = 0; i < n; ++i) | |
2797 | if (!EQ (v[i], overlay) | |
2798 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2799 | !NILP (tem))) | |
2800 | break; | |
2801 | ||
2802 | return i < n; | |
2803 | } | |
2804 | ||
2805 | ||
74514898 | 2806 | \f |
fc04fa47 KH |
2807 | /* Fast function to just test if we're at an overlay boundary. */ |
2808 | int | |
d311d28c | 2809 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 2810 | { |
2410d73a SM |
2811 | Lisp_Object overlay; |
2812 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2813 | |
2410d73a | 2814 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2815 | { |
d311d28c | 2816 | ptrdiff_t endpos; |
fc04fa47 | 2817 | |
2410d73a | 2818 | XSETMISC (overlay ,tail); |
8e50cc2d | 2819 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2820 | abort (); |
2821 | ||
2822 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2823 | if (endpos < pos) | |
2824 | break; | |
2825 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2826 | return 1; | |
2827 | } | |
2828 | ||
2410d73a | 2829 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2830 | { |
d311d28c | 2831 | ptrdiff_t startpos; |
fc04fa47 | 2832 | |
2410d73a | 2833 | XSETMISC (overlay, tail); |
8e50cc2d | 2834 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2835 | abort (); |
2836 | ||
2837 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2838 | if (pos < startpos) | |
2839 | break; | |
2840 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2841 | return 1; | |
2842 | } | |
2843 | return 0; | |
2844 | } | |
2eec3b4e | 2845 | \f |
5985d248 KH |
2846 | struct sortvec |
2847 | { | |
2848 | Lisp_Object overlay; | |
d311d28c | 2849 | ptrdiff_t beg, end; |
fadf4e30 | 2850 | EMACS_INT priority; |
5985d248 KH |
2851 | }; |
2852 | ||
2853 | static int | |
d3da34e0 | 2854 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2855 | { |
dfcf069d AS |
2856 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2857 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2858 | if (s1->priority != s2->priority) |
c20998a7 | 2859 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2860 | if (s1->beg != s2->beg) |
c20998a7 | 2861 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2862 | if (s1->end != s2->end) |
c20998a7 | 2863 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
2864 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
2865 | between "equal" overlays. The result can still change between | |
2866 | invocations of Emacs, but it won't change in the middle of | |
2867 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
2868 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
2869 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
2870 | return 0; |
2871 | } | |
2872 | ||
2873 | /* Sort an array of overlays by priority. The array is modified in place. | |
2874 | The return value is the new size; this may be smaller than the original | |
2875 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2876 | ptrdiff_t |
2877 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2878 | { |
b081724f | 2879 | ptrdiff_t i, j; |
5985d248 KH |
2880 | struct sortvec *sortvec; |
2881 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2882 | ||
2883 | /* Put the valid and relevant overlays into sortvec. */ | |
2884 | ||
2885 | for (i = 0, j = 0; i < noverlays; i++) | |
2886 | { | |
0fa767e7 | 2887 | Lisp_Object tem; |
c99fc30f | 2888 | Lisp_Object overlay; |
5985d248 | 2889 | |
c99fc30f | 2890 | overlay = overlay_vec[i]; |
5985d248 KH |
2891 | if (OVERLAY_VALID (overlay) |
2892 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2893 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2894 | { | |
0fa767e7 KH |
2895 | /* If we're interested in a specific window, then ignore |
2896 | overlays that are limited to some other window. */ | |
2897 | if (w) | |
5985d248 | 2898 | { |
28545e04 | 2899 | Lisp_Object window; |
0fa767e7 KH |
2900 | |
2901 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2902 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2903 | continue; |
5985d248 | 2904 | } |
0fa767e7 KH |
2905 | |
2906 | /* This overlay is good and counts: put it into sortvec. */ | |
2907 | sortvec[j].overlay = overlay; | |
2908 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2909 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2910 | tem = Foverlay_get (overlay, Qpriority); | |
2911 | if (INTEGERP (tem)) | |
2912 | sortvec[j].priority = XINT (tem); | |
2913 | else | |
2914 | sortvec[j].priority = 0; | |
2915 | j++; | |
5985d248 KH |
2916 | } |
2917 | } | |
2918 | noverlays = j; | |
2919 | ||
2920 | /* Sort the overlays into the proper order: increasing priority. */ | |
2921 | ||
2922 | if (noverlays > 1) | |
2923 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2924 | ||
2925 | for (i = 0; i < noverlays; i++) | |
2926 | overlay_vec[i] = sortvec[i].overlay; | |
2927 | return (noverlays); | |
2928 | } | |
2929 | \f | |
bbbe9545 KH |
2930 | struct sortstr |
2931 | { | |
cb26008f | 2932 | Lisp_Object string, string2; |
93cb6be3 | 2933 | ptrdiff_t size; |
8961a454 | 2934 | EMACS_INT priority; |
bbbe9545 KH |
2935 | }; |
2936 | ||
e8185fa8 KH |
2937 | struct sortstrlist |
2938 | { | |
2939 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
2940 | ptrdiff_t size; /* Allocated length of that array. */ |
2941 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 2942 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
2943 | }; |
2944 | ||
2945 | /* Buffers for storing information about the overlays touching a given | |
2946 | position. These could be automatic variables in overlay_strings, but | |
2947 | it's more efficient to hold onto the memory instead of repeatedly | |
2948 | allocating and freeing it. */ | |
2949 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2950 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2951 | |
2952 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 2953 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 2954 | |
bbbe9545 KH |
2955 | /* A comparison function suitable for passing to qsort. */ |
2956 | static int | |
d3da34e0 | 2957 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
2958 | { |
2959 | struct sortstr *s1 = (struct sortstr *)as1; | |
2960 | struct sortstr *s2 = (struct sortstr *)as2; | |
2961 | if (s1->size != s2->size) | |
c20998a7 | 2962 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 2963 | if (s1->priority != s2->priority) |
c20998a7 | 2964 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
2965 | return 0; |
2966 | } | |
2967 | ||
e8185fa8 | 2968 | static void |
93cb6be3 PE |
2969 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
2970 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 2971 | { |
d311d28c | 2972 | ptrdiff_t nbytes; |
43d27a72 | 2973 | |
e8185fa8 | 2974 | if (ssl->used == ssl->size) |
0065d054 | 2975 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 2976 | ssl->buf[ssl->used].string = str; |
cb26008f | 2977 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2978 | ssl->buf[ssl->used].size = size; |
2979 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2980 | ssl->used++; | |
43d27a72 | 2981 | |
4b4deea2 | 2982 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2983 | nbytes = SCHARS (str); |
43d27a72 | 2984 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2985 | nbytes = count_size_as_multibyte (SDATA (str), |
2986 | SBYTES (str)); | |
43d27a72 | 2987 | else |
d5db4077 | 2988 | nbytes = SBYTES (str); |
43d27a72 | 2989 | |
0065d054 PE |
2990 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
2991 | memory_full (SIZE_MAX); | |
43d27a72 RS |
2992 | ssl->bytes += nbytes; |
2993 | ||
cb26008f | 2994 | if (STRINGP (str2)) |
43d27a72 | 2995 | { |
4b4deea2 | 2996 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2997 | nbytes = SCHARS (str2); |
43d27a72 | 2998 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2999 | nbytes = count_size_as_multibyte (SDATA (str2), |
3000 | SBYTES (str2)); | |
43d27a72 | 3001 | else |
d5db4077 | 3002 | nbytes = SBYTES (str2); |
43d27a72 | 3003 | |
0065d054 PE |
3004 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3005 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3006 | ssl->bytes += nbytes; |
3007 | } | |
e8185fa8 | 3008 | } |
bbbe9545 KH |
3009 | |
3010 | /* Return the concatenation of the strings associated with overlays that | |
3011 | begin or end at POS, ignoring overlays that are specific to a window | |
3012 | other than W. The strings are concatenated in the appropriate order: | |
3013 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3014 | lower. Normally all of the after-strings come first, but zero-sized |
3015 | overlays have their after-strings ride along with the before-strings | |
3016 | because it would look strange to print them inside-out. | |
3017 | ||
3018 | Returns the string length, and stores the contents indirectly through | |
3019 | PSTR, if that variable is non-null. The string may be overwritten by | |
3020 | subsequent calls. */ | |
6b5d3b89 | 3021 | |
d311d28c PE |
3022 | ptrdiff_t |
3023 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3024 | { |
28545e04 | 3025 | Lisp_Object overlay, window, str; |
2410d73a | 3026 | struct Lisp_Overlay *ov; |
d311d28c | 3027 | ptrdiff_t startpos, endpos; |
4b4deea2 | 3028 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3029 | |
e8185fa8 KH |
3030 | overlay_heads.used = overlay_heads.bytes = 0; |
3031 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3032 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3033 | { |
2410d73a | 3034 | XSETMISC (overlay, ov); |
c2d5b10f | 3035 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3036 | |
3037 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3038 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3039 | if (endpos < pos) | |
3040 | break; | |
3041 | if (endpos != pos && startpos != pos) | |
3042 | continue; | |
3043 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3044 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3045 | continue; |
e8185fa8 KH |
3046 | if (startpos == pos |
3047 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3048 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3049 | (startpos == endpos |
3050 | ? Foverlay_get (overlay, Qafter_string) | |
3051 | : Qnil), | |
3052 | Foverlay_get (overlay, Qpriority), | |
3053 | endpos - startpos); | |
3054 | else if (endpos == pos | |
3055 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3056 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3057 | Foverlay_get (overlay, Qpriority), |
3058 | endpos - startpos); | |
bbbe9545 | 3059 | } |
2410d73a | 3060 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3061 | { |
2410d73a SM |
3062 | XSETMISC (overlay, ov); |
3063 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3064 | |
3065 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3066 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3067 | if (startpos > pos) | |
3068 | break; | |
e8185fa8 KH |
3069 | if (endpos != pos && startpos != pos) |
3070 | continue; | |
3071 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3072 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3073 | continue; |
e8185fa8 KH |
3074 | if (startpos == pos |
3075 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3076 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3077 | (startpos == endpos |
3078 | ? Foverlay_get (overlay, Qafter_string) | |
3079 | : Qnil), | |
3080 | Foverlay_get (overlay, Qpriority), | |
3081 | endpos - startpos); | |
3082 | else if (endpos == pos | |
3083 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3084 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3085 | Foverlay_get (overlay, Qpriority), |
3086 | endpos - startpos); | |
bbbe9545 | 3087 | } |
e8185fa8 KH |
3088 | if (overlay_tails.used > 1) |
3089 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3090 | cmp_for_strings); | |
3091 | if (overlay_heads.used > 1) | |
3092 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3093 | cmp_for_strings); | |
3094 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3095 | { |
e8185fa8 | 3096 | Lisp_Object tem; |
d311d28c | 3097 | ptrdiff_t i; |
9f4d7cde | 3098 | unsigned char *p; |
0065d054 | 3099 | ptrdiff_t total; |
bbbe9545 | 3100 | |
0065d054 PE |
3101 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3102 | memory_full (SIZE_MAX); | |
3103 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3104 | if (total > overlay_str_len) |
0065d054 PE |
3105 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3106 | total - overlay_str_len, -1, 1); | |
3107 | ||
bbbe9545 | 3108 | p = overlay_str_buf; |
e8185fa8 | 3109 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3110 | { |
d311d28c | 3111 | ptrdiff_t nbytes; |
e8185fa8 | 3112 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3113 | nbytes = copy_text (SDATA (tem), p, |
3114 | SBYTES (tem), | |
43d27a72 RS |
3115 | STRING_MULTIBYTE (tem), multibyte); |
3116 | p += nbytes; | |
bbbe9545 | 3117 | } |
e8185fa8 | 3118 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3119 | { |
d311d28c | 3120 | ptrdiff_t nbytes; |
e8185fa8 | 3121 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3122 | nbytes = copy_text (SDATA (tem), p, |
3123 | SBYTES (tem), | |
43d27a72 RS |
3124 | STRING_MULTIBYTE (tem), multibyte); |
3125 | p += nbytes; | |
cb26008f KH |
3126 | tem = overlay_heads.buf[i].string2; |
3127 | if (STRINGP (tem)) | |
3128 | { | |
d5db4077 KR |
3129 | nbytes = copy_text (SDATA (tem), p, |
3130 | SBYTES (tem), | |
43d27a72 RS |
3131 | STRING_MULTIBYTE (tem), multibyte); |
3132 | p += nbytes; | |
cb26008f | 3133 | } |
bbbe9545 | 3134 | } |
cb26008f KH |
3135 | if (p != overlay_str_buf + total) |
3136 | abort (); | |
bbbe9545 KH |
3137 | if (pstr) |
3138 | *pstr = overlay_str_buf; | |
e8185fa8 | 3139 | return total; |
bbbe9545 | 3140 | } |
e8185fa8 | 3141 | return 0; |
bbbe9545 KH |
3142 | } |
3143 | \f | |
5c4f68f1 | 3144 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3145 | |
2eec3b4e | 3146 | void |
d311d28c | 3147 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3148 | { |
2410d73a SM |
3149 | Lisp_Object overlay, beg, end; |
3150 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3151 | |
3152 | /* See if anything in overlays_before should move to overlays_after. */ | |
3153 | ||
3154 | /* We don't strictly need prev in this loop; it should always be nil. | |
3155 | But we use it for symmetry and in case that should cease to be true | |
3156 | with some future change. */ | |
2410d73a SM |
3157 | prev = NULL; |
3158 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3159 | { |
2410d73a SM |
3160 | next = tail->next; |
3161 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3162 | |
3163 | /* If the overlay is not valid, get rid of it. */ | |
3164 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3165 | #if 1 |
3166 | abort (); | |
3167 | #else | |
2eec3b4e RS |
3168 | { |
3169 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3170 | if (!NILP (prev)) | |
7539e11f | 3171 | XCDR (prev) = next; |
2eec3b4e | 3172 | else |
5c4f68f1 | 3173 | buf->overlays_before = next; |
2eec3b4e RS |
3174 | tail = prev; |
3175 | continue; | |
3176 | } | |
52f8ec73 | 3177 | #endif |
1ab256cb | 3178 | |
2eec3b4e RS |
3179 | beg = OVERLAY_START (overlay); |
3180 | end = OVERLAY_END (overlay); | |
1ab256cb | 3181 | |
2eec3b4e | 3182 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3183 | { |
2eec3b4e | 3184 | /* OVERLAY needs to be moved. */ |
d311d28c | 3185 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3186 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3187 | |
3188 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3189 | if (prev) |
3190 | prev->next = next; | |
2eec3b4e | 3191 | else |
5c4f68f1 | 3192 | buf->overlays_before = next; |
2eec3b4e RS |
3193 | |
3194 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3195 | other_prev = NULL; |
3196 | for (other = buf->overlays_after; other; | |
3197 | other_prev = other, other = other->next) | |
1ab256cb | 3198 | { |
6af718a4 | 3199 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3200 | |
2410d73a SM |
3201 | XSETMISC (otheroverlay, other); |
3202 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3203 | |
3204 | otherbeg = OVERLAY_START (otheroverlay); | |
3205 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3206 | break; | |
1ab256cb | 3207 | } |
2eec3b4e RS |
3208 | |
3209 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3210 | tail->next = other; |
3211 | if (other_prev) | |
3212 | other_prev->next = tail; | |
1ab256cb | 3213 | else |
5c4f68f1 | 3214 | buf->overlays_after = tail; |
2eec3b4e | 3215 | tail = prev; |
1ab256cb | 3216 | } |
2eec3b4e RS |
3217 | else |
3218 | /* We've reached the things that should stay in overlays_before. | |
3219 | All the rest of overlays_before must end even earlier, | |
3220 | so stop now. */ | |
3221 | break; | |
3222 | } | |
3223 | ||
3224 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3225 | prev = NULL; |
3226 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3227 | { |
2410d73a SM |
3228 | next = tail->next; |
3229 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3230 | |
3231 | /* If the overlay is not valid, get rid of it. */ | |
3232 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3233 | #if 1 |
3234 | abort (); | |
3235 | #else | |
2eec3b4e RS |
3236 | { |
3237 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3238 | if (!NILP (prev)) | |
7539e11f | 3239 | XCDR (prev) = next; |
2eec3b4e | 3240 | else |
5c4f68f1 | 3241 | buf->overlays_after = next; |
2eec3b4e RS |
3242 | tail = prev; |
3243 | continue; | |
3244 | } | |
52f8ec73 | 3245 | #endif |
2eec3b4e RS |
3246 | |
3247 | beg = OVERLAY_START (overlay); | |
3248 | end = OVERLAY_END (overlay); | |
3249 | ||
3250 | /* Stop looking, when we know that nothing further | |
3251 | can possibly end before POS. */ | |
3252 | if (OVERLAY_POSITION (beg) > pos) | |
3253 | break; | |
3254 | ||
3255 | if (OVERLAY_POSITION (end) <= pos) | |
3256 | { | |
3257 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3258 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3259 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3260 | |
3261 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3262 | if (prev) |
3263 | prev->next = next; | |
2eec3b4e | 3264 | else |
5c4f68f1 | 3265 | buf->overlays_after = next; |
2eec3b4e RS |
3266 | |
3267 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3268 | other_prev = NULL; |
3269 | for (other = buf->overlays_before; other; | |
3270 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3271 | { |
3272 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3273 | |
2410d73a SM |
3274 | XSETMISC (otheroverlay, other); |
3275 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3276 | |
3277 | otherend = OVERLAY_END (otheroverlay); | |
3278 | if (OVERLAY_POSITION (otherend) <= where) | |
3279 | break; | |
3280 | } | |
3281 | ||
3282 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3283 | tail->next = other; |
3284 | if (other_prev) | |
3285 | other_prev->next = tail; | |
2eec3b4e | 3286 | else |
5c4f68f1 | 3287 | buf->overlays_before = tail; |
2eec3b4e RS |
3288 | tail = prev; |
3289 | } | |
3290 | } | |
3291 | ||
c2d5b10f | 3292 | buf->overlay_center = pos; |
2eec3b4e | 3293 | } |
2b1bdf65 | 3294 | |
423cdb46 | 3295 | void |
d311d28c | 3296 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3297 | { |
3298 | /* After an insertion, the lists are still sorted properly, | |
3299 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3300 | if (current_buffer->overlay_center >= pos) |
3301 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3302 | } |
3303 | ||
3304 | void | |
d311d28c | 3305 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3306 | { |
c2d5b10f | 3307 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3308 | /* The deletion was to our right. No change needed; the before- and |
3309 | after-lists are still consistent. */ | |
3310 | ; | |
d311d28c | 3311 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3312 | /* The deletion was to our left. We need to adjust the center value |
3313 | to account for the change in position, but the lists are consistent | |
3314 | given the new value. */ | |
c2d5b10f | 3315 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3316 | else |
3317 | /* We're right in the middle. There might be things on the after-list | |
3318 | that now belong on the before-list. Recentering will move them, | |
3319 | and also update the center point. */ | |
3320 | recenter_overlay_lists (current_buffer, pos); | |
3321 | } | |
3322 | ||
2b1bdf65 KH |
3323 | /* Fix up overlays that were garbled as a result of permuting markers |
3324 | in the range START through END. Any overlay with at least one | |
3325 | endpoint in this range will need to be unlinked from the overlay | |
3326 | list and reinserted in its proper place. | |
3327 | Such an overlay might even have negative size at this point. | |
6b61353c | 3328 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3329 | void |
d311d28c | 3330 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3331 | { |
6af718a4 | 3332 | Lisp_Object overlay; |
5df8f01b PE |
3333 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3334 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3335 | /* These are either nil, indicating that before_list or after_list |
3336 | should be assigned, or the cons cell the cdr of which should be | |
3337 | assigned. */ | |
2410d73a | 3338 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3339 | /* 'Parent', likewise, indicates a cons cell or |
3340 | current_buffer->overlays_before or overlays_after, depending | |
3341 | which loop we're in. */ | |
2410d73a | 3342 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3343 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3344 | |
3345 | /* This algorithm shifts links around instead of consing and GCing. | |
3346 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3347 | well-formed list except that its last element, the CDR of beforep |
3348 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3349 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3350 | that before_list isn't initialized, although it may look | |
3351 | strange. */ | |
2410d73a | 3352 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3353 | { |
2410d73a | 3354 | XSETMISC (overlay, tail); |
6b61353c | 3355 | |
2b1bdf65 | 3356 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3357 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3358 | ||
3359 | /* If the overlay is backwards, make it empty. */ | |
3360 | if (endpos < startpos) | |
3361 | { | |
3362 | startpos = endpos; | |
3363 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3364 | Qnil); | |
3365 | } | |
3366 | ||
2b1bdf65 KH |
3367 | if (endpos < start) |
3368 | break; | |
60ebfdf3 | 3369 | |
2b1bdf65 KH |
3370 | if (endpos < end |
3371 | || (startpos >= start && startpos < end)) | |
3372 | { | |
2b1bdf65 KH |
3373 | /* Add it to the end of the wrong list. Later on, |
3374 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3375 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3376 | { |
2410d73a | 3377 | if (!afterp) |
1138e742 KR |
3378 | after_list = tail; |
3379 | else | |
2410d73a | 3380 | afterp->next = tail; |
1138e742 | 3381 | afterp = tail; |
2b1bdf65 KH |
3382 | } |
3383 | else | |
3384 | { | |
2410d73a | 3385 | if (!beforep) |
1138e742 KR |
3386 | before_list = tail; |
3387 | else | |
2410d73a | 3388 | beforep->next = tail; |
1138e742 | 3389 | beforep = tail; |
2b1bdf65 | 3390 | } |
2410d73a SM |
3391 | if (!parent) |
3392 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3393 | else |
2410d73a SM |
3394 | parent->next = tail->next; |
3395 | tail = tail->next; | |
2b1bdf65 KH |
3396 | } |
3397 | else | |
2410d73a | 3398 | parent = tail, tail = parent->next; |
2b1bdf65 | 3399 | } |
2410d73a | 3400 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3401 | { |
2410d73a | 3402 | XSETMISC (overlay, tail); |
6b61353c | 3403 | |
2b1bdf65 | 3404 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3405 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3406 | ||
3407 | /* If the overlay is backwards, make it empty. */ | |
3408 | if (endpos < startpos) | |
3409 | { | |
3410 | startpos = endpos; | |
3411 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3412 | Qnil); |
6b61353c KH |
3413 | } |
3414 | ||
2b1bdf65 KH |
3415 | if (startpos >= end) |
3416 | break; | |
6b61353c | 3417 | |
2b1bdf65 KH |
3418 | if (startpos >= start |
3419 | || (endpos >= start && endpos < end)) | |
3420 | { | |
c2d5b10f | 3421 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3422 | { |
2410d73a | 3423 | if (!afterp) |
1138e742 KR |
3424 | after_list = tail; |
3425 | else | |
2410d73a | 3426 | afterp->next = tail; |
1138e742 | 3427 | afterp = tail; |
2b1bdf65 KH |
3428 | } |
3429 | else | |
3430 | { | |
2410d73a | 3431 | if (!beforep) |
1138e742 KR |
3432 | before_list = tail; |
3433 | else | |
2410d73a | 3434 | beforep->next = tail; |
1138e742 | 3435 | beforep = tail; |
2b1bdf65 | 3436 | } |
2410d73a SM |
3437 | if (!parent) |
3438 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3439 | else |
2410d73a SM |
3440 | parent->next = tail->next; |
3441 | tail = tail->next; | |
2b1bdf65 KH |
3442 | } |
3443 | else | |
2410d73a | 3444 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3445 | } |
3446 | ||
3447 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3448 | and let the recenter function make it sane again. */ | |
2410d73a | 3449 | if (beforep) |
1138e742 | 3450 | { |
2410d73a | 3451 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3452 | current_buffer->overlays_before = before_list; |
3453 | } | |
c2d5b10f | 3454 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3455 | |
2410d73a | 3456 | if (afterp) |
1138e742 | 3457 | { |
2410d73a | 3458 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3459 | current_buffer->overlays_after = after_list; |
3460 | } | |
c2d5b10f | 3461 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3462 | } |
3b06f880 KH |
3463 | |
3464 | /* We have two types of overlay: the one whose ending marker is | |
3465 | after-insertion-marker (this is the usual case) and the one whose | |
3466 | ending marker is before-insertion-marker. When `overlays_before' | |
3467 | contains overlays of the latter type and the former type in this | |
3468 | order and both overlays end at inserting position, inserting a text | |
3469 | increases only the ending marker of the latter type, which results | |
3470 | in incorrect ordering of `overlays_before'. | |
3471 | ||
3472 | This function fixes ordering of overlays in the slot | |
3473 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3474 | was at PREV, and now is at POS. */ | |
3475 | ||
01136e9b | 3476 | void |
d311d28c | 3477 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3478 | { |
2410d73a SM |
3479 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3480 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3481 | Lisp_Object tem; | |
d311d28c | 3482 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3483 | |
3484 | /* After the insertion, the several overlays may be in incorrect | |
3485 | order. The possibility is that, in the list `overlays_before', | |
3486 | an overlay which ends at POS appears after an overlay which ends | |
3487 | at PREV. Since POS is greater than PREV, we must fix the | |
3488 | ordering of these overlays, by moving overlays ends at POS before | |
3489 | the overlays ends at PREV. */ | |
3490 | ||
3491 | /* At first, find a place where disordered overlays should be linked | |
3492 | in. It is where an overlay which end before POS exists. (i.e. an | |
3493 | overlay whose ending marker is after-insertion-marker if disorder | |
3494 | exists). */ | |
2410d73a SM |
3495 | while (tail |
3496 | && (XSETMISC (tem, tail), | |
3497 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3498 | { |
3499 | parent = tail; | |
2410d73a | 3500 | tail = tail->next; |
1138e742 | 3501 | } |
3b06f880 KH |
3502 | |
3503 | /* If we don't find such an overlay, | |
3504 | or the found one ends before PREV, | |
3505 | or the found one is the last one in the list, | |
3506 | we don't have to fix anything. */ | |
f93ad4cf | 3507 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3508 | return; |
3509 | ||
1138e742 KR |
3510 | right_pair = parent; |
3511 | parent = tail; | |
2410d73a | 3512 | tail = tail->next; |
3b06f880 | 3513 | |
1138e742 | 3514 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3515 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3516 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3517 | we found an overlay which ends before PREV, the remaining | |
3518 | overlays are in correct order. */ | |
2410d73a | 3519 | while (tail) |
3b06f880 | 3520 | { |
2410d73a SM |
3521 | XSETMISC (tem, tail); |
3522 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3523 | |
3524 | if (end == pos) | |
3525 | { /* This overlay is disordered. */ | |
2410d73a | 3526 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3527 | |
3528 | /* Unlink the found overlay. */ | |
2410d73a SM |
3529 | tail = found->next; |
3530 | parent->next = tail; | |
1138e742 KR |
3531 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3532 | and link it into the right place. */ | |
2410d73a | 3533 | if (!right_pair) |
1138e742 | 3534 | { |
2410d73a | 3535 | found->next = bp->overlays_before; |
1138e742 KR |
3536 | bp->overlays_before = found; |
3537 | } | |
3538 | else | |
3539 | { | |
2410d73a SM |
3540 | found->next = right_pair->next; |
3541 | right_pair->next = found; | |
1138e742 | 3542 | } |
3b06f880 KH |
3543 | } |
3544 | else if (end == prev) | |
1138e742 KR |
3545 | { |
3546 | parent = tail; | |
2410d73a | 3547 | tail = tail->next; |
1138e742 | 3548 | } |
3b06f880 KH |
3549 | else /* No more disordered overlay. */ |
3550 | break; | |
3551 | } | |
3552 | } | |
2eec3b4e | 3553 | \f |
52f8ec73 | 3554 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3555 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3556 | (Lisp_Object object) |
52f8ec73 JB |
3557 | { |
3558 | return (OVERLAYP (object) ? Qt : Qnil); | |
3559 | } | |
3560 | ||
acac2700 | 3561 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3562 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3563 | If omitted, BUFFER defaults to the current buffer. |
3564 | BEG and END may be integers or markers. | |
a625ee20 RS |
3565 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3566 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3567 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3568 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3569 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3570 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3571 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3572 | { |
3573 | Lisp_Object overlay; | |
5c4f68f1 | 3574 | struct buffer *b; |
2eec3b4e | 3575 | |
5c4f68f1 | 3576 | if (NILP (buffer)) |
67180c6a | 3577 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3578 | else |
b7826503 | 3579 | CHECK_BUFFER (buffer); |
883047b9 JB |
3580 | if (MARKERP (beg) |
3581 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3582 | error ("Marker points into wrong buffer"); | |
3583 | if (MARKERP (end) | |
3584 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3585 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3586 | |
b7826503 PJ |
3587 | CHECK_NUMBER_COERCE_MARKER (beg); |
3588 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3589 | |
883047b9 | 3590 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3591 | { |
c99fc30f KH |
3592 | Lisp_Object temp; |
3593 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3594 | } |
883047b9 JB |
3595 | |
3596 | b = XBUFFER (buffer); | |
3597 | ||
3598 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3599 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3600 | |
acac2700 RS |
3601 | if (!NILP (front_advance)) |
3602 | XMARKER (beg)->insertion_type = 1; | |
3603 | if (!NILP (rear_advance)) | |
3604 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3605 | |
48e2e3ba | 3606 | overlay = allocate_misc (); |
89ca3e1b | 3607 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3608 | XOVERLAY (overlay)->start = beg; |
3609 | XOVERLAY (overlay)->end = end; | |
3610 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3611 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3612 | |
177c0ea7 | 3613 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3614 | end = OVERLAY_END (overlay); |
c2d5b10f | 3615 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3616 | { |
3617 | if (b->overlays_after) | |
3618 | XOVERLAY (overlay)->next = b->overlays_after; | |
3619 | b->overlays_after = XOVERLAY (overlay); | |
3620 | } | |
2eec3b4e | 3621 | else |
2410d73a SM |
3622 | { |
3623 | if (b->overlays_before) | |
3624 | XOVERLAY (overlay)->next = b->overlays_before; | |
3625 | b->overlays_before = XOVERLAY (overlay); | |
3626 | } | |
2eec3b4e RS |
3627 | |
3628 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3629 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3630 | |
b61982dd JB |
3631 | /* We don't need to redisplay the region covered by the overlay, because |
3632 | the overlay has no properties at the moment. */ | |
3633 | ||
2eec3b4e RS |
3634 | return overlay; |
3635 | } | |
876aa27c RS |
3636 | \f |
3637 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3638 | ||
3639 | static void | |
d311d28c | 3640 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3641 | { |
876aa27c RS |
3642 | if (start > end) |
3643 | { | |
d311d28c | 3644 | ptrdiff_t temp = start; |
26f545d7 GM |
3645 | start = end; |
3646 | end = temp; | |
876aa27c RS |
3647 | } |
3648 | ||
481b5054 | 3649 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3650 | |
876aa27c RS |
3651 | /* If this is a buffer not in the selected window, |
3652 | we must do other windows. */ | |
3653 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3654 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3655 | /* If multiple windows show this buffer, we must do other windows. */ |
3656 | else if (buffer_shared > 1) | |
3657 | windows_or_buffers_changed = 1; | |
18700091 KS |
3658 | /* If we modify an overlay at the end of the buffer, we cannot |
3659 | be sure that window end is still valid. */ | |
3660 | else if (end >= ZV && start <= ZV) | |
3661 | windows_or_buffers_changed = 1; | |
876aa27c | 3662 | |
d8b9150f | 3663 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3664 | } |
2eec3b4e | 3665 | |
018ba359 | 3666 | \f |
2410d73a | 3667 | static struct Lisp_Overlay * |
d3da34e0 | 3668 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3669 | { |
3670 | struct Lisp_Overlay *tmp, *prev; | |
3671 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3672 | if (tmp == overlay) | |
3673 | { | |
3674 | if (prev) | |
3675 | prev->next = tmp->next; | |
3676 | else | |
3677 | list = tmp->next; | |
3678 | overlay->next = NULL; | |
3679 | break; | |
3680 | } | |
3681 | return list; | |
3682 | } | |
3683 | ||
5c4f68f1 | 3684 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3685 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3686 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3687 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3688 | buffer. */) |
5842a27b | 3689 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3690 | { |
471fe23d | 3691 | struct buffer *b, *ob = 0; |
0a4469c9 | 3692 | Lisp_Object obuffer; |
d311d28c | 3693 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3694 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3695 | |
b7826503 | 3696 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3697 | if (NILP (buffer)) |
3698 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3699 | if (NILP (buffer)) |
67180c6a | 3700 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3701 | CHECK_BUFFER (buffer); |
883047b9 | 3702 | |
471fe23d TN |
3703 | if (NILP (Fbuffer_live_p (buffer))) |
3704 | error ("Attempt to move overlay to a dead buffer"); | |
3705 | ||
883047b9 JB |
3706 | if (MARKERP (beg) |
3707 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3708 | error ("Marker points into wrong buffer"); | |
3709 | if (MARKERP (end) | |
3710 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3711 | error ("Marker points into wrong buffer"); | |
3712 | ||
b7826503 PJ |
3713 | CHECK_NUMBER_COERCE_MARKER (beg); |
3714 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3715 | |
471fe23d | 3716 | if (XINT (beg) > XINT (end)) |
02481186 | 3717 | { |
471fe23d TN |
3718 | Lisp_Object temp; |
3719 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3720 | } |
3721 | ||
9d7608b7 KH |
3722 | specbind (Qinhibit_quit, Qt); |
3723 | ||
0a4469c9 | 3724 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3725 | b = XBUFFER (buffer); |
471fe23d TN |
3726 | |
3727 | if (!NILP (obuffer)) | |
3728 | { | |
3729 | ob = XBUFFER (obuffer); | |
3730 | ||
3731 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3732 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3733 | ||
3734 | ob->overlays_before = | |
3735 | unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3736 | ob->overlays_after = | |
3737 | unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3738 | eassert (XOVERLAY (overlay)->next == NULL); | |
3739 | } | |
3740 | ||
3741 | /* Set the overlay boundaries, which may clip them. */ | |
3742 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3743 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3744 | ||
3745 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3746 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3747 | |
c82ed728 | 3748 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3749 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3750 | { |
3751 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3752 | if (ob) |
3753 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3754 | |
3755 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3756 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3757 | } |
c82ed728 JB |
3758 | else |
3759 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3760 | { | |
79cce3f2 PE |
3761 | if (o_beg == n_beg) |
3762 | modify_overlay (b, o_end, n_end); | |
3763 | else if (o_end == n_end) | |
3764 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 3765 | else |
79cce3f2 | 3766 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 3767 | } |
b61982dd | 3768 | |
471fe23d TN |
3769 | /* Delete the overlay if it is empty after clipping and has the |
3770 | evaporate property. */ | |
3771 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
3772 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 3773 | |
471fe23d TN |
3774 | /* Put the overlay into the new buffer's overlay lists, first on the |
3775 | wrong list. */ | |
3776 | if (n_end < b->overlay_center) | |
2410d73a | 3777 | { |
8f924df7 KH |
3778 | XOVERLAY (overlay)->next = b->overlays_after; |
3779 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3780 | } |
2eec3b4e | 3781 | else |
2410d73a | 3782 | { |
8f924df7 KH |
3783 | XOVERLAY (overlay)->next = b->overlays_before; |
3784 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3785 | } |
2eec3b4e RS |
3786 | |
3787 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3788 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3789 | |
0a4469c9 | 3790 | return unbind_to (count, overlay); |
2eec3b4e RS |
3791 | } |
3792 | ||
3793 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3794 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3795 | (Lisp_Object overlay) |
2eec3b4e | 3796 | { |
0a4469c9 | 3797 | Lisp_Object buffer; |
5c4f68f1 | 3798 | struct buffer *b; |
d311d28c | 3799 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 3800 | |
b7826503 | 3801 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3802 | |
0a4469c9 RS |
3803 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3804 | if (NILP (buffer)) | |
3805 | return Qnil; | |
3806 | ||
3807 | b = XBUFFER (buffer); | |
0a4469c9 | 3808 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3809 | |
471fe23d TN |
3810 | b->overlays_before |
3811 | = unchain_overlay (b->overlays_before, XOVERLAY (overlay)); | |
3812 | b->overlays_after | |
3813 | = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
2410d73a | 3814 | eassert (XOVERLAY (overlay)->next == NULL); |
471fe23d | 3815 | |
876aa27c | 3816 | modify_overlay (b, |
8231a9aa RS |
3817 | marker_position (OVERLAY_START (overlay)), |
3818 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3819 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3820 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3821 | ||
e58c389d | 3822 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3823 | display optimizations for the affected buffer, on the basis that |
3824 | these strings may contain newlines. This is easier to do than to | |
3825 | check for that situation during redisplay. */ | |
3826 | if (!windows_or_buffers_changed | |
3827 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3828 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3829 | b->prevent_redisplay_optimizations_p = 1; | |
3830 | ||
0a4469c9 | 3831 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3832 | } |
3833 | \f | |
8ebafa8d JB |
3834 | /* Overlay dissection functions. */ |
3835 | ||
a7ca3326 | 3836 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3837 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3838 | (Lisp_Object overlay) |
8ebafa8d | 3839 | { |
b7826503 | 3840 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3841 | |
3842 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3843 | } | |
3844 | ||
a7ca3326 | 3845 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3846 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3847 | (Lisp_Object overlay) |
8ebafa8d | 3848 | { |
b7826503 | 3849 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3850 | |
3851 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3852 | } | |
3853 | ||
3854 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3855 | doc: /* Return the buffer OVERLAY belongs to. |
3856 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3857 | (Lisp_Object overlay) |
8ebafa8d | 3858 | { |
b7826503 | 3859 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3860 | |
3861 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3862 | } | |
3863 | ||
3864 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3865 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3866 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3867 | OVERLAY. */) |
5842a27b | 3868 | (Lisp_Object overlay) |
8ebafa8d | 3869 | { |
b7826503 | 3870 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3871 | |
48e2e3ba | 3872 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3873 | } |
3874 | ||
3875 | \f | |
2eec3b4e | 3876 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3877 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3878 | (Lisp_Object pos) |
2eec3b4e | 3879 | { |
b081724f | 3880 | ptrdiff_t len, noverlays; |
2eec3b4e | 3881 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3882 | Lisp_Object result; |
3883 | ||
b7826503 | 3884 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3885 | |
3886 | len = 10; | |
a9800ae8 | 3887 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3888 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3889 | ||
3890 | /* Put all the overlays we want in a vector in overlay_vec. | |
3891 | Store the length in len. */ | |
2a77a7d7 | 3892 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3893 | 0, 0, 0); |
2eec3b4e RS |
3894 | |
3895 | /* Make a list of them all. */ | |
3896 | result = Flist (noverlays, overlay_vec); | |
3897 | ||
9ac0d9e0 | 3898 | xfree (overlay_vec); |
2eec3b4e RS |
3899 | return result; |
3900 | } | |
3901 | ||
74514898 | 3902 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3903 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3904 | Overlap means that at least one character is contained within the overlay |
3905 | and also contained within the specified region. | |
7723e095 MR |
3906 | Empty overlays are included in the result if they are located at BEG, |
3907 | between BEG and END, or at END provided END denotes the position at the | |
3908 | end of the buffer. */) | |
5842a27b | 3909 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3910 | { |
21514da7 | 3911 | ptrdiff_t len, noverlays; |
74514898 | 3912 | Lisp_Object *overlay_vec; |
74514898 RS |
3913 | Lisp_Object result; |
3914 | ||
b7826503 PJ |
3915 | CHECK_NUMBER_COERCE_MARKER (beg); |
3916 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3917 | |
3918 | len = 10; | |
3919 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3920 | ||
3921 | /* Put all the overlays we want in a vector in overlay_vec. | |
3922 | Store the length in len. */ | |
3923 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3924 | NULL, NULL); |
74514898 RS |
3925 | |
3926 | /* Make a list of them all. */ | |
3927 | result = Flist (noverlays, overlay_vec); | |
3928 | ||
3929 | xfree (overlay_vec); | |
3930 | return result; | |
3931 | } | |
3932 | ||
a7ca3326 | 3933 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3934 | 1, 1, 0, |
7ee72033 | 3935 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3936 | If there are no overlay boundaries from POS to (point-max), |
3937 | the value is (point-max). */) | |
5842a27b | 3938 | (Lisp_Object pos) |
2eec3b4e | 3939 | { |
b081724f | 3940 | ptrdiff_t i, len, noverlays; |
d311d28c | 3941 | ptrdiff_t endpos; |
2eec3b4e | 3942 | Lisp_Object *overlay_vec; |
2eec3b4e | 3943 | |
b7826503 | 3944 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3945 | |
3946 | len = 10; | |
3947 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3948 | ||
3949 | /* Put all the overlays we want in a vector in overlay_vec. | |
3950 | Store the length in len. | |
3951 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3952 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3953 | &endpos, 0, 1); |
2eec3b4e RS |
3954 | |
3955 | /* If any of these overlays ends before endpos, | |
3956 | use its ending point instead. */ | |
3957 | for (i = 0; i < noverlays; i++) | |
3958 | { | |
3959 | Lisp_Object oend; | |
d311d28c | 3960 | ptrdiff_t oendpos; |
2eec3b4e RS |
3961 | |
3962 | oend = OVERLAY_END (overlay_vec[i]); | |
3963 | oendpos = OVERLAY_POSITION (oend); | |
3964 | if (oendpos < endpos) | |
3965 | endpos = oendpos; | |
1ab256cb RM |
3966 | } |
3967 | ||
9ac0d9e0 | 3968 | xfree (overlay_vec); |
2eec3b4e RS |
3969 | return make_number (endpos); |
3970 | } | |
239c932b | 3971 | |
a7ca3326 | 3972 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 3973 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 3974 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
3975 | If there are no overlay boundaries from (point-min) to POS, |
3976 | the value is (point-min). */) | |
5842a27b | 3977 | (Lisp_Object pos) |
239c932b | 3978 | { |
d311d28c | 3979 | ptrdiff_t prevpos; |
239c932b | 3980 | Lisp_Object *overlay_vec; |
b081724f | 3981 | ptrdiff_t len; |
239c932b | 3982 | |
b7826503 | 3983 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3984 | |
624bbdc4 RS |
3985 | /* At beginning of buffer, we know the answer; |
3986 | avoid bug subtracting 1 below. */ | |
3987 | if (XINT (pos) == BEGV) | |
3988 | return pos; | |
3989 | ||
017f0539 GM |
3990 | len = 10; |
3991 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3992 | ||
239c932b RS |
3993 | /* Put all the overlays we want in a vector in overlay_vec. |
3994 | Store the length in len. | |
daa1c109 | 3995 | prevpos gets the position of the previous change. */ |
328ab8e7 | 3996 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3997 | 0, &prevpos, 1); |
239c932b | 3998 | |
239c932b RS |
3999 | xfree (overlay_vec); |
4000 | return make_number (prevpos); | |
4001 | } | |
2eec3b4e RS |
4002 | \f |
4003 | /* These functions are for debugging overlays. */ | |
4004 | ||
4005 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4006 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4007 | The car has all the overlays before the overlay center; |
4008 | the cdr has all the overlays after the overlay center. | |
4009 | Recentering overlays moves overlays between these lists. | |
4010 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4011 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4012 | (void) |
2eec3b4e | 4013 | { |
2410d73a SM |
4014 | struct Lisp_Overlay *ol; |
4015 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4016 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4017 | { | |
4018 | XSETMISC (tmp, ol); | |
4019 | before = Fcons (tmp, before); | |
4020 | } | |
4021 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4022 | { | |
4023 | XSETMISC (tmp, ol); | |
4024 | after = Fcons (tmp, after); | |
4025 | } | |
4026 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4027 | } |
4028 | ||
4029 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4030 | doc: /* Recenter the overlays of the current buffer around position POS. |
4031 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4032 | for positions far away from POS). */) | |
5842a27b | 4033 | (Lisp_Object pos) |
2eec3b4e | 4034 | { |
d311d28c | 4035 | ptrdiff_t p; |
b7826503 | 4036 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4037 | |
d311d28c PE |
4038 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4039 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4040 | return Qnil; |
4041 | } | |
4042 | \f | |
a7ca3326 | 4043 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4044 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4045 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4046 | { |
b7826503 | 4047 | CHECK_OVERLAY (overlay); |
9a593927 | 4048 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4049 | } |
4050 | ||
4051 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4052 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4053 | VALUE will be returned.*/) | |
5842a27b | 4054 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4055 | { |
48e2e3ba | 4056 | Lisp_Object tail, buffer; |
9d7608b7 | 4057 | int changed; |
2eec3b4e | 4058 | |
b7826503 | 4059 | CHECK_OVERLAY (overlay); |
b61982dd | 4060 | |
274a9425 RS |
4061 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4062 | ||
48e2e3ba | 4063 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4064 | CONSP (tail) && CONSP (XCDR (tail)); |
4065 | tail = XCDR (XCDR (tail))) | |
4066 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4067 | { |
7539e11f | 4068 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4069 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4070 | goto found; |
274a9425 | 4071 | } |
9d7608b7 KH |
4072 | /* It wasn't in the list, so add it to the front. */ |
4073 | changed = !NILP (value); | |
48e2e3ba KH |
4074 | XOVERLAY (overlay)->plist |
4075 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4076 | found: |
4077 | if (! NILP (buffer)) | |
4078 | { | |
4079 | if (changed) | |
876aa27c | 4080 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4081 | marker_position (OVERLAY_START (overlay)), |
4082 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4083 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4084 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4085 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4086 | Fdelete_overlay (overlay); | |
4087 | } | |
7d63db98 | 4088 | |
2eec3b4e | 4089 | return value; |
1ab256cb RM |
4090 | } |
4091 | \f | |
9115729e KH |
4092 | /* Subroutine of report_overlay_modification. */ |
4093 | ||
4094 | /* Lisp vector holding overlay hook functions to call. | |
4095 | Vector elements come in pairs. | |
4096 | Each even-index element is a list of hook functions. | |
4097 | The following odd-index element is the overlay they came from. | |
4098 | ||
4099 | Before the buffer change, we fill in this vector | |
4100 | as we call overlay hook functions. | |
4101 | After the buffer change, we get the functions to call from this vector. | |
4102 | This way we always call the same functions before and after the change. */ | |
4103 | static Lisp_Object last_overlay_modification_hooks; | |
4104 | ||
4105 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4106 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4107 | |
4108 | /* Add one functionlist/overlay pair | |
4109 | to the end of last_overlay_modification_hooks. */ | |
4110 | ||
4111 | static void | |
d3da34e0 | 4112 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4113 | { |
d311d28c | 4114 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4115 | |
d311d28c PE |
4116 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4117 | last_overlay_modification_hooks = | |
4118 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4119 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4120 | functionlist); last_overlay_modification_hooks_used++; | |
4121 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4122 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4123 | } |
4124 | \f | |
173f2a64 RS |
4125 | /* Run the modification-hooks of overlays that include |
4126 | any part of the text in START to END. | |
9115729e KH |
4127 | If this change is an insertion, also |
4128 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4129 | and the insert-after-hooks of overlay ending at START. |
4130 | ||
4131 | This is called both before and after the modification. | |
4132 | AFTER is nonzero when we call after the modification. | |
4133 | ||
9115729e KH |
4134 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4135 | When AFTER is nonzero, they are the start position, | |
4136 | the position after the inserted new text, | |
4137 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4138 | |
4139 | void | |
d3da34e0 JB |
4140 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4141 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4142 | { |
2410d73a SM |
4143 | Lisp_Object prop, overlay; |
4144 | struct Lisp_Overlay *tail; | |
9115729e KH |
4145 | /* 1 if this change is an insertion. */ |
4146 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4147 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4148 | |
4149 | overlay = Qnil; | |
2410d73a | 4150 | tail = NULL; |
9115729e | 4151 | |
27c6b98e SM |
4152 | /* We used to run the functions as soon as we found them and only register |
4153 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4154 | case. But running elisp code as we traverse the list of overlays is | |
4155 | painful because the list can be modified by the elisp code so we had to | |
4156 | copy at several places. We now simply do a read-only traversal that | |
4157 | only collects the functions to run and we run them afterwards. It's | |
4158 | simpler, especially since all the code was already there. -stef */ | |
4159 | ||
a615c6dc | 4160 | if (!after) |
173f2a64 | 4161 | { |
a615c6dc SM |
4162 | /* We are being called before a change. |
4163 | Scan the overlays to find the functions to call. */ | |
4164 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4165 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4166 | { |
d311d28c | 4167 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4168 | Lisp_Object ostart, oend; |
4169 | ||
2410d73a | 4170 | XSETMISC (overlay, tail); |
a615c6dc SM |
4171 | |
4172 | ostart = OVERLAY_START (overlay); | |
4173 | oend = OVERLAY_END (overlay); | |
4174 | endpos = OVERLAY_POSITION (oend); | |
4175 | if (XFASTINT (start) > endpos) | |
4176 | break; | |
4177 | startpos = OVERLAY_POSITION (ostart); | |
4178 | if (insertion && (XFASTINT (start) == startpos | |
4179 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4180 | { |
a615c6dc SM |
4181 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4182 | if (!NILP (prop)) | |
4183 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4184 | } |
a615c6dc SM |
4185 | if (insertion && (XFASTINT (start) == endpos |
4186 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4187 | { |
a615c6dc SM |
4188 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4189 | if (!NILP (prop)) | |
4190 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4191 | } |
a615c6dc SM |
4192 | /* Test for intersecting intervals. This does the right thing |
4193 | for both insertion and deletion. */ | |
4194 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4195 | { |
a615c6dc SM |
4196 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4197 | if (!NILP (prop)) | |
4198 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4199 | } |
173f2a64 | 4200 | } |
60ebfdf3 | 4201 | |
2410d73a | 4202 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4203 | { |
d311d28c | 4204 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4205 | Lisp_Object ostart, oend; |
4206 | ||
2410d73a | 4207 | XSETMISC (overlay, tail); |
a615c6dc SM |
4208 | |
4209 | ostart = OVERLAY_START (overlay); | |
4210 | oend = OVERLAY_END (overlay); | |
4211 | startpos = OVERLAY_POSITION (ostart); | |
4212 | endpos = OVERLAY_POSITION (oend); | |
4213 | if (XFASTINT (end) < startpos) | |
4214 | break; | |
4215 | if (insertion && (XFASTINT (start) == startpos | |
4216 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4217 | { |
a615c6dc SM |
4218 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4219 | if (!NILP (prop)) | |
4220 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4221 | } |
a615c6dc SM |
4222 | if (insertion && (XFASTINT (start) == endpos |
4223 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4224 | { |
a615c6dc SM |
4225 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4226 | if (!NILP (prop)) | |
4227 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4228 | } |
a615c6dc SM |
4229 | /* Test for intersecting intervals. This does the right thing |
4230 | for both insertion and deletion. */ | |
4231 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4232 | { |
a615c6dc SM |
4233 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4234 | if (!NILP (prop)) | |
4235 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4236 | } |
173f2a64 RS |
4237 | } |
4238 | } | |
55b48893 | 4239 | |
a615c6dc SM |
4240 | GCPRO4 (overlay, arg1, arg2, arg3); |
4241 | { | |
4242 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4243 | First copy the vector contents, in case some of these hooks | |
4244 | do subsequent modification of the buffer. */ | |
d311d28c | 4245 | ptrdiff_t size = last_overlay_modification_hooks_used; |
a615c6dc | 4246 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); |
d311d28c | 4247 | ptrdiff_t i; |
a615c6dc | 4248 | |
72af86bd AS |
4249 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4250 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4251 | gcpro1.var = copy; |
4252 | gcpro1.nvars = size; | |
4253 | ||
4254 | for (i = 0; i < size;) | |
4255 | { | |
8f54f30a PE |
4256 | Lisp_Object prop_i, overlay_i; |
4257 | prop_i = copy[i++]; | |
4258 | overlay_i = copy[i++]; | |
4259 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4260 | } |
4261 | } | |
55b48893 | 4262 | UNGCPRO; |
173f2a64 RS |
4263 | } |
4264 | ||
4265 | static void | |
d3da34e0 JB |
4266 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4267 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4268 | { |
930a9140 | 4269 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4270 | |
930a9140 | 4271 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4272 | |
6d70a280 | 4273 | while (CONSP (list)) |
173f2a64 | 4274 | { |
930a9140 | 4275 | if (NILP (arg3)) |
6d70a280 | 4276 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4277 | else |
6d70a280 SM |
4278 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4279 | list = XCDR (list); | |
173f2a64 RS |
4280 | } |
4281 | UNGCPRO; | |
4282 | } | |
9d7608b7 KH |
4283 | |
4284 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4285 | property is set. */ | |
4286 | void | |
d311d28c | 4287 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4288 | { |
2410d73a SM |
4289 | Lisp_Object overlay, hit_list; |
4290 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4291 | |
4292 | hit_list = Qnil; | |
c2d5b10f | 4293 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4294 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4295 | { |
d311d28c | 4296 | ptrdiff_t endpos; |
2410d73a | 4297 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4298 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4299 | if (endpos < pos) | |
4300 | break; | |
4301 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4302 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4303 | hit_list = Fcons (overlay, hit_list); |
4304 | } | |
4305 | else | |
2410d73a | 4306 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4307 | { |
d311d28c | 4308 | ptrdiff_t startpos; |
2410d73a | 4309 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4310 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4311 | if (startpos > pos) | |
4312 | break; | |
4313 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4314 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4315 | hit_list = Fcons (overlay, hit_list); |
4316 | } | |
7539e11f KR |
4317 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4318 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4319 | } |
173f2a64 | 4320 | \f |
54dfdeb0 | 4321 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4322 | in the slot with offset OFFSET. */ |
4323 | ||
0fa3ba92 | 4324 | void |
d3da34e0 | 4325 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4326 | { |
ad97b375 | 4327 | Lisp_Object predicate; |
177c0ea7 | 4328 | |
64e16c3c | 4329 | switch (type) |
0fa3ba92 | 4330 | { |
2de9f71c | 4331 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4332 | case Lisp_String: predicate = Qstringp; break; |
4333 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4334 | default: abort (); | |
0fa3ba92 JB |
4335 | } |
4336 | ||
ad97b375 | 4337 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4338 | } |
7c02e886 | 4339 | |
0fa3ba92 | 4340 | \f |
b86af064 GM |
4341 | /*********************************************************************** |
4342 | Allocation with mmap | |
4343 | ***********************************************************************/ | |
4344 | ||
4345 | #ifdef USE_MMAP_FOR_BUFFERS | |
4346 | ||
4347 | #include <sys/types.h> | |
4348 | #include <sys/mman.h> | |
4349 | ||
4350 | #ifndef MAP_ANON | |
4351 | #ifdef MAP_ANONYMOUS | |
4352 | #define MAP_ANON MAP_ANONYMOUS | |
4353 | #else | |
4354 | #define MAP_ANON 0 | |
4355 | #endif | |
4356 | #endif | |
4357 | ||
09dfdf85 GM |
4358 | #ifndef MAP_FAILED |
4359 | #define MAP_FAILED ((void *) -1) | |
4360 | #endif | |
4361 | ||
b86af064 | 4362 | #include <stdio.h> |
b86af064 GM |
4363 | |
4364 | #if MAP_ANON == 0 | |
4365 | #include <fcntl.h> | |
4366 | #endif | |
4367 | ||
4368 | #include "coding.h" | |
4369 | ||
4370 | ||
4371 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4372 | The current implementation lets the system select mapped | |
4373 | addresses; we're not using MAP_FIXED in general, except when | |
4374 | trying to enlarge regions. | |
4375 | ||
4376 | Each mapped region starts with a mmap_region structure, the user | |
4377 | area starts after that structure, aligned to MEM_ALIGN. | |
4378 | ||
4379 | +-----------------------+ | |
4380 | | struct mmap_info + | | |
4381 | | padding | | |
4382 | +-----------------------+ | |
4383 | | user data | | |
4384 | | | | |
4385 | | | | |
4386 | +-----------------------+ */ | |
4387 | ||
4388 | struct mmap_region | |
4389 | { | |
4390 | /* User-specified size. */ | |
4391 | size_t nbytes_specified; | |
177c0ea7 | 4392 | |
b86af064 GM |
4393 | /* Number of bytes mapped */ |
4394 | size_t nbytes_mapped; | |
4395 | ||
4396 | /* Pointer to the location holding the address of the memory | |
4397 | allocated with the mmap'd block. The variable actually points | |
4398 | after this structure. */ | |
261cb4bb | 4399 | void **var; |
b86af064 GM |
4400 | |
4401 | /* Next and previous in list of all mmap'd regions. */ | |
4402 | struct mmap_region *next, *prev; | |
4403 | }; | |
4404 | ||
4405 | /* Doubly-linked list of mmap'd regions. */ | |
4406 | ||
4407 | static struct mmap_region *mmap_regions; | |
4408 | ||
4409 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4410 | /dev/zero will be opened on it. */ | |
4411 | ||
4412 | static int mmap_fd; | |
4413 | ||
4414 | /* Temporary storage for mmap_set_vars, see there. */ | |
4415 | ||
4416 | static struct mmap_region *mmap_regions_1; | |
4417 | static int mmap_fd_1; | |
4418 | ||
4419 | /* Page size on this system. */ | |
4420 | ||
4421 | static int mmap_page_size; | |
4422 | ||
cd1181db | 4423 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4424 | |
4425 | static int mmap_initialized_p; | |
4426 | ||
4427 | /* Value is X rounded up to the next multiple of N. */ | |
4428 | ||
4429 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4430 | ||
4431 | /* Size of mmap_region structure plus padding. */ | |
4432 | ||
4433 | #define MMAP_REGION_STRUCT_SIZE \ | |
4434 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4435 | ||
4436 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4437 | region, return a pointer to the start of the region. */ | |
4438 | ||
4439 | #define MMAP_REGION(P) \ | |
4440 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4441 | ||
4442 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4443 | to the start of the user-visible part of the region. */ | |
4444 | ||
4445 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4446 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4447 | |
4448 | #define MEM_ALIGN sizeof (double) | |
4449 | ||
7273faa1 DL |
4450 | /* Predicate returning true if part of the address range [START .. END] |
4451 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4452 | memory mapping. |
4453 | ||
da6062e6 | 4454 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4455 | something else. This can be overridden by system configuration |
4456 | files if system-specific means to determine this exists. */ | |
4457 | ||
4458 | #ifndef MMAP_ALLOCATED_P | |
4459 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4460 | #endif | |
4461 | ||
53964682 | 4462 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4463 | |
1dae0f0a AS |
4464 | static void |
4465 | mmap_init (void) | |
4466 | { | |
4467 | #if MAP_ANON == 0 | |
4468 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4469 | in a dumped Emacs. */ | |
4470 | if (mmap_fd <= 0) | |
4471 | { | |
4472 | /* No anonymous mmap -- we need the file descriptor. */ | |
4473 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4474 | if (mmap_fd == -1) | |
4475 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4476 | } | |
4477 | #endif /* MAP_ANON == 0 */ | |
4478 | ||
4479 | if (mmap_initialized_p) | |
4480 | return; | |
4481 | mmap_initialized_p = 1; | |
b86af064 | 4482 | |
1dae0f0a AS |
4483 | #if MAP_ANON != 0 |
4484 | mmap_fd = -1; | |
4485 | #endif | |
4486 | ||
4487 | mmap_page_size = getpagesize (); | |
4488 | } | |
b86af064 GM |
4489 | |
4490 | /* Return a region overlapping address range START...END, or null if | |
4491 | none. END is not including, i.e. the last byte in the range | |
4492 | is at END - 1. */ | |
4493 | ||
4494 | static struct mmap_region * | |
261cb4bb | 4495 | mmap_find (void *start, void *end) |
b86af064 GM |
4496 | { |
4497 | struct mmap_region *r; | |
4498 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4499 | |
b86af064 GM |
4500 | for (r = mmap_regions; r; r = r->next) |
4501 | { | |
4502 | char *rstart = (char *) r; | |
4503 | char *rend = rstart + r->nbytes_mapped; | |
4504 | ||
4505 | if (/* First byte of range, i.e. START, in this region? */ | |
4506 | (s >= rstart && s < rend) | |
4507 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4508 | || (e > rstart && e <= rend) | |
4509 | /* First byte of this region in the range? */ | |
4510 | || (rstart >= s && rstart < e) | |
4511 | /* Last byte of this region in the range? */ | |
4512 | || (rend > s && rend <= e)) | |
4513 | break; | |
4514 | } | |
4515 | ||
4516 | return r; | |
4517 | } | |
4518 | ||
4519 | ||
4520 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4521 | the region. Value is non-zero if successful. */ | |
4522 | ||
4523 | static int | |
1dae0f0a | 4524 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4525 | { |
4526 | if (r->next) | |
4527 | r->next->prev = r->prev; | |
4528 | if (r->prev) | |
4529 | r->prev->next = r->next; | |
4530 | else | |
4531 | mmap_regions = r->next; | |
177c0ea7 | 4532 | |
261cb4bb | 4533 | if (munmap (r, r->nbytes_mapped) == -1) |
b86af064 GM |
4534 | { |
4535 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4536 | return 0; | |
4537 | } | |
4538 | ||
4539 | return 1; | |
4540 | } | |
4541 | ||
4542 | ||
4543 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4544 | Value is non-zero if successful. */ | |
4545 | ||
4546 | static int | |
1dae0f0a | 4547 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4548 | { |
4549 | char *region_end = (char *) r + r->nbytes_mapped; | |
4550 | size_t nbytes; | |
4551 | int success = 0; | |
4552 | ||
4553 | if (npages < 0) | |
4554 | { | |
4555 | /* Unmap pages at the end of the region. */ | |
4556 | nbytes = - npages * mmap_page_size; | |
4557 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4558 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4559 | else | |
4560 | { | |
4561 | r->nbytes_mapped -= nbytes; | |
4562 | success = 1; | |
4563 | } | |
4564 | } | |
4565 | else if (npages > 0) | |
4566 | { | |
b86af064 | 4567 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4568 | |
b86af064 GM |
4569 | /* Try to map additional pages at the end of the region. We |
4570 | cannot do this if the address range is already occupied by | |
4571 | something else because mmap deletes any previous mapping. | |
4572 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4573 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4574 | { |
261cb4bb | 4575 | void *p; |
177c0ea7 | 4576 | |
b86af064 GM |
4577 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4578 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4579 | if (p == MAP_FAILED) | |
edaa9aed | 4580 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4581 | else if (p != region_end) |
b86af064 GM |
4582 | { |
4583 | /* Kernels are free to choose a different address. In | |
4584 | that case, unmap what we've mapped above; we have | |
4585 | no use for it. */ | |
4586 | if (munmap (p, nbytes) == -1) | |
4587 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4588 | } | |
4589 | else | |
4590 | { | |
4591 | r->nbytes_mapped += nbytes; | |
4592 | success = 1; | |
4593 | } | |
4594 | } | |
4595 | } | |
4596 | ||
4597 | return success; | |
4598 | } | |
4599 | ||
4600 | ||
4601 | /* Set or reset variables holding references to mapped regions. If | |
4602 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4603 | non-zero, set all variables to the start of the user-areas | |
4604 | of mapped regions. | |
4605 | ||
4606 | This function is called from Fdump_emacs to ensure that the dumped | |
4607 | Emacs doesn't contain references to memory that won't be mapped | |
4608 | when Emacs starts. */ | |
4609 | ||
4610 | void | |
1dae0f0a | 4611 | mmap_set_vars (int restore_p) |
b86af064 GM |
4612 | { |
4613 | struct mmap_region *r; | |
4614 | ||
4615 | if (restore_p) | |
4616 | { | |
4617 | mmap_regions = mmap_regions_1; | |
4618 | mmap_fd = mmap_fd_1; | |
4619 | for (r = mmap_regions; r; r = r->next) | |
4620 | *r->var = MMAP_USER_AREA (r); | |
4621 | } | |
4622 | else | |
4623 | { | |
4624 | for (r = mmap_regions; r; r = r->next) | |
4625 | *r->var = NULL; | |
4626 | mmap_regions_1 = mmap_regions; | |
4627 | mmap_regions = NULL; | |
4628 | mmap_fd_1 = mmap_fd; | |
4629 | mmap_fd = -1; | |
4630 | } | |
4631 | } | |
4632 | ||
4633 | ||
4634 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4635 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4636 | address of some variable which will use the data area. | |
4637 | ||
4638 | The allocation of 0 bytes is valid. | |
4639 | ||
4640 | If we can't allocate the necessary memory, set *VAR to null, and | |
4641 | return null. */ | |
4642 | ||
261cb4bb PE |
4643 | static void * |
4644 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4645 | { |
4646 | void *p; | |
4647 | size_t map; | |
4648 | ||
4649 | mmap_init (); | |
4650 | ||
4651 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4652 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4653 | mmap_fd, 0); | |
177c0ea7 | 4654 | |
b86af064 GM |
4655 | if (p == MAP_FAILED) |
4656 | { | |
4657 | if (errno != ENOMEM) | |
4658 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4659 | p = NULL; | |
4660 | } | |
4661 | else | |
4662 | { | |
4663 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4664 | |
b86af064 GM |
4665 | r->nbytes_specified = nbytes; |
4666 | r->nbytes_mapped = map; | |
4667 | r->var = var; | |
4668 | r->prev = NULL; | |
4669 | r->next = mmap_regions; | |
4670 | if (r->next) | |
4671 | r->next->prev = r; | |
4672 | mmap_regions = r; | |
177c0ea7 | 4673 | |
b86af064 GM |
4674 | p = MMAP_USER_AREA (p); |
4675 | } | |
177c0ea7 | 4676 | |
b86af064 GM |
4677 | return *var = p; |
4678 | } | |
4679 | ||
4680 | ||
1dae0f0a AS |
4681 | /* Free a block of relocatable storage whose data is pointed to by |
4682 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4683 | ||
4684 | static void | |
261cb4bb | 4685 | mmap_free (void **var) |
1dae0f0a AS |
4686 | { |
4687 | mmap_init (); | |
4688 | ||
4689 | if (*var) | |
4690 | { | |
4691 | mmap_free_1 (MMAP_REGION (*var)); | |
4692 | *var = NULL; | |
4693 | } | |
4694 | } | |
4695 | ||
4696 | ||
b86af064 GM |
4697 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4698 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4699 | and return this value. If more memory cannot be allocated, then | |
4700 | leave *VAR unchanged, and return null. */ | |
4701 | ||
261cb4bb PE |
4702 | static void * |
4703 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4704 | { |
261cb4bb | 4705 | void *result; |
177c0ea7 | 4706 | |
b86af064 GM |
4707 | mmap_init (); |
4708 | ||
4709 | if (*var == NULL) | |
4710 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4711 | else if (nbytes == 0) |
b86af064 GM |
4712 | { |
4713 | mmap_free (var); | |
4714 | result = mmap_alloc (var, nbytes); | |
4715 | } | |
4716 | else | |
4717 | { | |
4718 | struct mmap_region *r = MMAP_REGION (*var); | |
4719 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4720 | |
b86af064 GM |
4721 | if (room < nbytes) |
4722 | { | |
4723 | /* Must enlarge. */ | |
261cb4bb | 4724 | void *old_ptr = *var; |
b86af064 GM |
4725 | |
4726 | /* Try to map additional pages at the end of the region. | |
4727 | If that fails, allocate a new region, copy data | |
4728 | from the old region, then free it. */ | |
4729 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4730 | / mmap_page_size))) | |
4731 | { | |
4732 | r->nbytes_specified = nbytes; | |
4733 | *var = result = old_ptr; | |
4734 | } | |
4735 | else if (mmap_alloc (var, nbytes)) | |
4736 | { | |
72af86bd | 4737 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4738 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4739 | result = *var; | |
4740 | r = MMAP_REGION (result); | |
4741 | r->nbytes_specified = nbytes; | |
4742 | } | |
4743 | else | |
4744 | { | |
4745 | *var = old_ptr; | |
4746 | result = NULL; | |
4747 | } | |
4748 | } | |
4749 | else if (room - nbytes >= mmap_page_size) | |
4750 | { | |
4751 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4752 | memory back to the system. |
4753 | ||
4754 | The extra parens are to make the division happens first, | |
4755 | on positive values, so we know it will round towards | |
4756 | zero. */ | |
bb63c5c9 | 4757 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4758 | result = *var; |
4759 | r->nbytes_specified = nbytes; | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | /* Leave it alone. */ | |
4764 | result = *var; | |
4765 | r->nbytes_specified = nbytes; | |
4766 | } | |
4767 | } | |
4768 | ||
4769 | return result; | |
4770 | } | |
4771 | ||
4772 | ||
b86af064 GM |
4773 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4774 | ||
4775 | ||
4776 | \f | |
4777 | /*********************************************************************** | |
4778 | Buffer-text Allocation | |
4779 | ***********************************************************************/ | |
4780 | ||
b86af064 GM |
4781 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
4782 | ||
4783 | static void | |
fd05c7e9 | 4784 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 4785 | { |
261cb4bb | 4786 | void *p; |
177c0ea7 | 4787 | |
b86af064 GM |
4788 | BLOCK_INPUT; |
4789 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4790 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4791 | #elif defined REL_ALLOC |
261cb4bb | 4792 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4793 | #else |
815add84 | 4794 | p = xmalloc (nbytes); |
b86af064 | 4795 | #endif |
177c0ea7 | 4796 | |
b86af064 GM |
4797 | if (p == NULL) |
4798 | { | |
4799 | UNBLOCK_INPUT; | |
531b0165 | 4800 | memory_full (nbytes); |
b86af064 GM |
4801 | } |
4802 | ||
4803 | b->text->beg = (unsigned char *) p; | |
4804 | UNBLOCK_INPUT; | |
4805 | } | |
4806 | ||
4807 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4808 | shrink it. */ | |
4809 | ||
4810 | void | |
d311d28c | 4811 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 4812 | { |
261cb4bb | 4813 | void *p; |
fd05c7e9 PE |
4814 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4815 | + delta); | |
b86af064 GM |
4816 | BLOCK_INPUT; |
4817 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4818 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4819 | #elif defined REL_ALLOC |
261cb4bb | 4820 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
4821 | #else |
4822 | p = xrealloc (b->text->beg, nbytes); | |
4823 | #endif | |
177c0ea7 | 4824 | |
b86af064 GM |
4825 | if (p == NULL) |
4826 | { | |
4827 | UNBLOCK_INPUT; | |
531b0165 | 4828 | memory_full (nbytes); |
b86af064 GM |
4829 | } |
4830 | ||
4831 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4832 | UNBLOCK_INPUT; | |
4833 | } | |
4834 | ||
4835 | ||
4836 | /* Free buffer B's text buffer. */ | |
4837 | ||
4838 | static void | |
d3da34e0 | 4839 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4840 | { |
4841 | BLOCK_INPUT; | |
4842 | ||
4843 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4844 | mmap_free ((void **) &b->text->beg); |
b86af064 | 4845 | #elif defined REL_ALLOC |
261cb4bb | 4846 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
4847 | #else |
4848 | xfree (b->text->beg); | |
4849 | #endif | |
177c0ea7 | 4850 | |
b86af064 GM |
4851 | BUF_BEG_ADDR (b) = NULL; |
4852 | UNBLOCK_INPUT; | |
4853 | } | |
4854 | ||
4855 | ||
4856 | \f | |
4857 | /*********************************************************************** | |
4858 | Initialization | |
4859 | ***********************************************************************/ | |
4860 | ||
dfcf069d | 4861 | void |
d3da34e0 | 4862 | init_buffer_once (void) |
1ab256cb | 4863 | { |
7c02e886 GM |
4864 | int idx; |
4865 | ||
72af86bd | 4866 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4867 | |
1ab256cb RM |
4868 | /* Make sure all markable slots in buffer_defaults |
4869 | are initialized reasonably, so mark_buffer won't choke. */ | |
4870 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4871 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4872 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4873 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4874 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4875 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4876 | /* Prevent GC from getting confused. */ |
4877 | buffer_defaults.text = &buffer_defaults.own_text; | |
4878 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4879 | BUF_INTERVALS (&buffer_defaults) = 0; |
4880 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
eab3844f | 4881 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, 0); |
67180c6a | 4882 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
eab3844f | 4883 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, 0); |
67180c6a | 4884 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4885 | |
4886 | /* Set up the default values of various buffer slots. */ | |
4887 | /* Must do these before making the first buffer! */ | |
4888 | ||
f532dca0 | 4889 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4890 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4891 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4892 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4893 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4894 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4895 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4896 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 4897 | #ifndef old |
4b4deea2 | 4898 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 4899 | #endif |
4b4deea2 TT |
4900 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4901 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4902 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4903 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4904 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4905 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4906 | buffer_defaults.overlays_before = NULL; |
4907 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4908 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4909 | |
4b4deea2 TT |
4910 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4911 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4912 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4913 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4cc60b9b | 4914 | BVAR (&buffer_defaults, bidi_display_reordering) = Qt; |
4b4deea2 TT |
4915 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; |
4916 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4917 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4918 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4919 | |
4b4deea2 TT |
4920 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4921 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4922 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4923 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4924 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4925 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4926 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4927 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4928 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4929 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4930 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4931 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4932 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4933 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4934 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4935 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4936 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4937 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4938 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4939 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4940 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4941 | |
4942 | /* Assign the local-flags to the slots that have default values. | |
4943 | The local flag is a bit that is used in the buffer | |
4944 | to say that it has its own local value for the slot. | |
4945 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4946 | ||
4947 | /* Nothing can work if this isn't true */ | |
d6202519 | 4948 | { verify (sizeof (EMACS_INT) == sizeof (Lisp_Object)); } |
1ab256cb RM |
4949 | |
4950 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4951 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4952 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4953 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4954 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4955 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4956 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4957 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4958 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4959 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
4960 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
4961 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
4962 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
4963 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
4964 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
4965 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
4966 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
4967 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
4968 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
4969 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 4970 | |
7c02e886 | 4971 | idx = 1; |
4b4deea2 TT |
4972 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
4973 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
4974 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
4975 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
4976 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
4977 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 4978 | #ifndef old |
4b4deea2 | 4979 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
54ad07d3 | 4980 | #endif |
4b4deea2 TT |
4981 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
4982 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
4983 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
4984 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
4985 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
4986 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
4987 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
4988 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
4989 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
4990 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
4991 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
4992 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
4993 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
4994 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 4995 | /* Make this one a permanent local. */ |
7c02e886 | 4996 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
4997 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
4998 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
4999 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5000 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5001 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5002 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5003 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5004 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5005 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5006 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5007 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5008 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5009 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5010 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5011 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5014 | |
5015 | /* Need more room? */ | |
7313acd0 | 5016 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5017 | abort (); |
7313acd0 | 5018 | last_per_buffer_idx = idx; |
177c0ea7 | 5019 | |
1ab256cb RM |
5020 | Vbuffer_alist = Qnil; |
5021 | current_buffer = 0; | |
5022 | all_buffers = 0; | |
5023 | ||
f4265f6c | 5024 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5025 | |
d67b4f80 | 5026 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5027 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5028 | |
d67b4f80 | 5029 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5030 | |
d67b4f80 | 5031 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5032 | |
d67b4f80 | 5033 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5034 | |
d67b4f80 | 5035 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5036 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5037 | |
1ab256cb | 5038 | /* super-magic invisible buffer */ |
d67b4f80 | 5039 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5040 | Vbuffer_alist = Qnil; |
5041 | ||
d67b4f80 | 5042 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5043 | |
5044 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5045 | } |
5046 | ||
dfcf069d | 5047 | void |
d3da34e0 | 5048 | init_buffer (void) |
1ab256cb | 5049 | { |
2381d133 | 5050 | char *pwd; |
136351b7 | 5051 | Lisp_Object temp; |
965d34eb | 5052 | ptrdiff_t len; |
1ab256cb | 5053 | |
b86af064 | 5054 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5055 | { |
5056 | /* When using the ralloc implementation based on mmap(2), buffer | |
5057 | text pointers will have been set to null in the dumped Emacs. | |
5058 | Map new memory. */ | |
5059 | struct buffer *b; | |
177c0ea7 | 5060 | |
f61f41d7 | 5061 | for (b = all_buffers; b; b = b->header.next.buffer) |
93c27ef1 | 5062 | if (b->text->beg == NULL) |
b86af064 | 5063 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5064 | } |
b86af064 | 5065 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5066 | |
1ab256cb | 5067 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5068 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5069 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5070 | |
01537133 | 5071 | pwd = get_current_dir_name (); |
a17b5ed1 | 5072 | |
156bdb41 | 5073 | if (!pwd) |
a17b5ed1 | 5074 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5075 | |
1ab256cb RM |
5076 | /* Maybe this should really use some standard subroutine |
5077 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5078 | len = strlen (pwd); |
5079 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5080 | { |
156bdb41 | 5081 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5082 | pwd = (char *) realloc (pwd, len + 2); |
5083 | if (!pwd) | |
5084 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5085 | pwd[len] = DIRECTORY_SEP; |
5086 | pwd[len + 1] = '\0'; | |
f7975d07 | 5087 | } |
0995fa35 | 5088 | |
4b4deea2 TT |
5089 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5090 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5091 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5092 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5093 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5094 | BVAR (current_buffer, directory) |
5095 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5096 | |
0995fa35 RS |
5097 | /* Add /: to the front of the name |
5098 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5099 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5100 | if (! NILP (temp) |
5101 | /* If the default dir is just /, TEMP is non-nil | |
5102 | because of the ange-ftp completion handler. | |
5103 | However, it is not necessary to turn / into /:/. | |
5104 | So avoid doing that. */ | |
4b4deea2 TT |
5105 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5106 | BVAR (current_buffer, directory) | |
5107 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5108 | |
136351b7 | 5109 | temp = get_minibuffer (0); |
4b4deea2 | 5110 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5111 | |
5112 | free (pwd); | |
1ab256cb RM |
5113 | } |
5114 | ||
d6aa1876 SM |
5115 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5116 | Object stored in the current buffer. address is the address of the slot | |
5117 | in the buffer that is current now. */ | |
5118 | ||
5119 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5120 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5121 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5122 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5123 | VNAME is the name of the buffer slot. |
5124 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5125 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5126 | do { \ | |
5127 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5128 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5129 | } while (0) |
d6aa1876 SM |
5130 | |
5131 | static void | |
8ea90aa3 | 5132 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5133 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5134 | { |
ce5b453a | 5135 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5136 | int offset; |
5137 | ||
ce5b453a | 5138 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5139 | offset = (char *)address - (char *)current_buffer; |
5140 | ||
ce5b453a SM |
5141 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5142 | bo_fwd->offset = offset; | |
5143 | bo_fwd->slottype = type; | |
b9598260 | 5144 | sym->declared_special = 1; |
ce5b453a SM |
5145 | sym->redirect = SYMBOL_FORWARDED; |
5146 | { | |
5147 | /* I tried to do the job without a cast, but it seems impossible. | |
5148 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5149 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5150 | } | |
5151 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5152 | |
5153 | if (PER_BUFFER_IDX (offset) == 0) | |
5154 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5155 | slot of buffer_local_flags */ | |
5156 | abort (); | |
5157 | } | |
5158 | ||
5159 | ||
1ab256cb | 5160 | /* initialize the buffer routines */ |
dfcf069d | 5161 | void |
d3da34e0 | 5162 | syms_of_buffer (void) |
1ab256cb | 5163 | { |
9115729e KH |
5164 | staticpro (&last_overlay_modification_hooks); |
5165 | last_overlay_modification_hooks | |
5166 | = Fmake_vector (make_number (10), Qnil); | |
5167 | ||
1ab256cb RM |
5168 | staticpro (&Vbuffer_defaults); |
5169 | staticpro (&Vbuffer_local_symbols); | |
5170 | staticpro (&Qfundamental_mode); | |
5171 | staticpro (&Qmode_class); | |
5172 | staticpro (&QSFundamental); | |
5173 | staticpro (&Vbuffer_alist); | |
5174 | staticpro (&Qprotected_field); | |
5175 | staticpro (&Qpermanent_local); | |
5176 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5177 | |
5178 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5179 | DEFSYM (Qoverlayp, "overlayp"); | |
5180 | DEFSYM (Qevaporate, "evaporate"); | |
5181 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5182 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5183 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5184 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5185 | DEFSYM (Qpriority, "priority"); | |
5186 | DEFSYM (Qbefore_string, "before-string"); | |
5187 | DEFSYM (Qafter_string, "after-string"); | |
5188 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5189 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5190 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5191 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5192 | ||
1ab256cb | 5193 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5194 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5195 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5196 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5197 | |
422745d0 TT |
5198 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5199 | mode_line_format, | |
5200 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5201 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5202 | |
422745d0 TT |
5203 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5204 | header_line_format, | |
5205 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5206 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5207 | |
422745d0 TT |
5208 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5209 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5210 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5211 | |
422745d0 TT |
5212 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5213 | extra_line_spacing, | |
5214 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5215 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5216 | |
422745d0 TT |
5217 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5218 | cursor_in_non_selected_windows, | |
5219 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5220 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5221 | ||
422745d0 TT |
5222 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5223 | abbrev_mode, | |
5224 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5225 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5226 | |
422745d0 TT |
5227 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5228 | ctl_arrow, | |
5229 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5230 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5231 | |
422745d0 TT |
5232 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5233 | enable_multibyte_characters, | |
fb7ada5f | 5234 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5235 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5236 | |
422745d0 TT |
5237 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5238 | buffer_file_coding_system, | |
5239 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5240 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5241 | |
422745d0 TT |
5242 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5243 | truncate_lines, | |
5244 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5245 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5246 | |
422745d0 TT |
5247 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5248 | fill_column, | |
5249 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5250 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5251 | |
422745d0 TT |
5252 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5253 | left_margin, | |
5254 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5255 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5256 | |
422745d0 TT |
5257 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5258 | tab_width, | |
5259 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5260 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5261 | |
422745d0 TT |
5262 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5263 | case_fold_search, | |
5264 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5265 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5266 | |
422745d0 TT |
5267 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5268 | left_margin_cols, | |
5269 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5270 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5271 | |
422745d0 TT |
5272 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5273 | right_margin_cols, | |
5274 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5275 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5276 | |
422745d0 TT |
5277 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5278 | left_fringe_width, | |
5279 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5280 | This is the same as (default-value 'left-fringe-width). */); |
5281 | ||
422745d0 TT |
5282 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5283 | right_fringe_width, | |
5284 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5285 | This is the same as (default-value 'right-fringe-width). */); |
5286 | ||
422745d0 TT |
5287 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5288 | fringes_outside_margins, | |
5289 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5290 | This is the same as (default-value 'fringes-outside-margins). */); |
5291 | ||
422745d0 TT |
5292 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5293 | scroll_bar_width, | |
5294 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5295 | This is the same as (default-value 'scroll-bar-width). */); |
5296 | ||
422745d0 TT |
5297 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5298 | vertical_scroll_bar_type, | |
5299 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5300 | This is the same as (default-value 'vertical-scroll-bar). */); |
5301 | ||
422745d0 TT |
5302 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5303 | indicate_empty_lines, | |
5304 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5305 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5306 | |
422745d0 TT |
5307 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5308 | indicate_buffer_boundaries, | |
5309 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5310 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5311 | ||
422745d0 TT |
5312 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5313 | fringe_indicator_alist, | |
5314 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5315 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5316 | ||
422745d0 TT |
5317 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5318 | fringe_cursor_alist, | |
5319 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5320 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5321 | ||
422745d0 TT |
5322 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5323 | scroll_up_aggressively, | |
5324 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5325 | This value applies in buffers that don't have their own local values. |
fc961256 | 5326 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5327 | |
422745d0 TT |
5328 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5329 | scroll_down_aggressively, | |
5330 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5331 | This value applies in buffers that don't have their own local values. |
fc961256 | 5332 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5333 | |
045dee35 | 5334 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5335 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5336 | Qnil, |
7614d762 RS |
5337 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5338 | The header line appears, optionally, at the top of a window; | |
5339 | the mode line appears at the bottom. */); | |
177c0ea7 | 5340 | |
4b4deea2 | 5341 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5342 | Qnil, |
5343 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5344 | |
5345 | The value may be nil, a string, a symbol or a list. | |
5346 | ||
018ba359 | 5347 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5348 | |
5349 | For any symbol other than t or nil, the symbol's value is processed as | |
5350 | a mode line construct. As a special exception, if that value is a | |
5351 | string, the string is processed verbatim, without handling any | |
5352 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5353 | `risky-local-variable' property, all properties in any strings, as | |
5354 | well as all :eval and :propertize forms in the value, are ignored. | |
5355 | ||
5356 | A list whose car is a string or list is processed by processing each | |
5357 | of the list elements recursively, as separate mode line constructs, | |
5358 | and concatenating the results. | |
5359 | ||
5360 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5361 | using the result as a mode line construct. Be careful--FORM should | |
5362 | not load any files, because that can cause an infinite recursion. | |
5363 | ||
5364 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5365 | processing ELT as the mode line construct, and adding the text | |
5366 | properties PROPS to the result. | |
5367 | ||
5368 | A list whose car is a symbol is processed by examining the symbol's | |
5369 | value, and, if that value is non-nil, processing the cadr of the list | |
5370 | recursively; and if that value is nil, processing the caddr of the | |
5371 | list recursively. | |
5372 | ||
5373 | A list whose car is an integer is processed by processing the cadr of | |
5374 | the list, and padding (if the number is positive) or truncating (if | |
5375 | negative) to the width specified by that number. | |
5376 | ||
018ba359 | 5377 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5378 | %b -- print buffer name. %f -- print visited file name. |
5379 | %F -- print frame name. | |
5380 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5381 | %& is like %*, but ignore read-only-ness. | |
5382 | % means buffer is read-only and * means it is modified. | |
5383 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5384 | %s -- print process status. %l -- print the current line number. | |
5385 | %c -- print the current column number (this makes editing slower). | |
5386 | To make the column number update correctly in all cases, | |
5387 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5388 | %i -- print the size of the buffer. |
5389 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5390 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5391 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5392 | or print Bottom or All. | |
018ba359 | 5393 | %n -- print Narrow if appropriate. |
dafbe726 | 5394 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5395 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5396 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5397 | %e -- print error message about full memory. |
f7165034 NR |
5398 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5399 | remote machine. | |
018ba359 PJ |
5400 | %[ -- print one [ for each recursive editing level. %] similar. |
5401 | %% -- print %. %- -- print infinitely many dashes. | |
5402 | Decimal digits after the % specify field width to which to pad. */); | |
5403 | ||
422745d0 | 5404 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5405 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5406 | |
4b4deea2 | 5407 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5408 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5409 | doc: /* Symbol for current buffer's major mode. |
5410 | The default value (normally `fundamental-mode') affects new buffers. | |
5411 | A value of nil means to use the current buffer's major mode, provided | |
5412 | it is not marked as "special". | |
5413 | ||
5414 | When a mode is used by default, `find-file' switches to it before it | |
5415 | reads the contents into the buffer and before it finishes setting up | |
5416 | the buffer. Thus, the mode and its hooks should not expect certain | |
5417 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5418 | to be set up. */); | |
1ab256cb | 5419 | |
4b4deea2 | 5420 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5421 | Qnil, |
64a7c220 | 5422 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5423 | Usually a string, but can use any of the constructs for `mode-line-format', |
5424 | which see. | |
5425 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5426 | |
4b4deea2 | 5427 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5428 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5429 | ||
4b4deea2 | 5430 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5431 | doc: /* Non-nil if Abbrev mode is enabled. |
5432 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5433 | |
4b4deea2 | 5434 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5435 | Qnil, |
fb7ada5f | 5436 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5437 | |
4b4deea2 | 5438 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5439 | make_number (LISP_INT_TAG), |
fb7ada5f | 5440 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5441 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5442 | |
4b4deea2 | 5443 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5444 | make_number (LISP_INT_TAG), |
fb7ada5f | 5445 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5446 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5447 | |
4b4deea2 | 5448 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5449 | make_number (LISP_INT_TAG), |
fb7ada5f | 5450 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5451 | This should be an integer greater than zero. */); |
1ab256cb | 5452 | |
4b4deea2 | 5453 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5454 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5455 | A value of nil means use backslash and octal digits. |
5456 | This variable does not apply to characters whose display is specified | |
5457 | in the current display table (if there is one). */); | |
1ab256cb | 5458 | |
3b06f880 | 5459 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5460 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5461 | Qnil, |
efc7e75f | 5462 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5463 | Otherwise they are regarded as unibyte. This affects the display, |
5464 | file I/O and the behavior of various editing commands. | |
5465 | ||
5466 | This variable is buffer-local but you cannot set it directly; | |
5467 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5468 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5469 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5470 | |
c71b5d9b | 5471 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5472 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5473 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5474 | This variable applies to saving the buffer, and also to `write-region' |
5475 | and other functions that use `write-region'. | |
5476 | It does not apply to sending output to subprocesses, however. | |
5477 | ||
5478 | If this is nil, the buffer is saved without any code conversion | |
5479 | unless some coding system is specified in `file-coding-system-alist' | |
5480 | for the buffer file. | |
5481 | ||
31a6cb06 EZ |
5482 | If the text to be saved cannot be encoded as specified by this variable, |
5483 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5484 | ||
018ba359 PJ |
5485 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5486 | ||
5487 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5488 | |
f44e260c | 5489 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5490 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5491 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5492 | |
6c0cf218 | 5493 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5494 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5495 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5496 | |
b44d9321 EZ |
5497 | If this is nil (the default), the direction of each paragraph is |
5498 | determined by the first strong directional character of its text. | |
5499 | The values of `right-to-left' and `left-to-right' override that. | |
5500 | Any other value is treated as nil. | |
b4bf28b7 | 5501 | |
b44d9321 EZ |
5502 | This variable has no effect unless the buffer's value of |
5503 | \`bidi-display-reordering' is non-nil. */); | |
5504 | ||
4b4deea2 | 5505 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5506 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5507 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5508 | |
5509 | Note that this is overridden by the variable | |
5510 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5511 | and this buffer is not full-frame width. |
5512 | ||
5513 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5514 | |
4b4deea2 | 5515 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5516 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5517 | When word-wrapping is on, continuation lines are wrapped at the space |
5518 | or tab character nearest to the right window edge. | |
5519 | If nil, continuation lines are wrapped at the right screen edge. | |
5520 | ||
5521 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5522 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5523 | word-wrapping, you might want to reduce the value of | |
5524 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5525 | in narrower windows. |
5526 | ||
5527 | Instead of setting this variable directly, most users should use | |
5528 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5529 | to t, and additionally redefines simple editing commands to act on | |
5530 | visual lines rather than logical lines. See the documentation of | |
5531 | `visual-line-mode'. */); | |
0858cd02 | 5532 | |
4b4deea2 | 5533 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5534 | make_number (Lisp_String), |
efc7e75f | 5535 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5536 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5537 | |
4b4deea2 | 5538 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5539 | Qnil, |
efc7e75f | 5540 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5541 | It is called after self-inserting any character specified in |
5542 | the `auto-fill-chars' table. | |
5543 | NOTE: This variable is not a hook; | |
5544 | its value may not be a list of functions. */); | |
1ab256cb | 5545 | |
4b4deea2 | 5546 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5547 | make_number (Lisp_String), |
efc7e75f | 5548 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5549 | |
4b4deea2 | 5550 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5551 | make_number (Lisp_String), |
efc7e75f | 5552 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5553 | The truename of a file is calculated by `file-truename' |
5554 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5555 | |
1ab256cb | 5556 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5557 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5558 | make_number (Lisp_String), |
7614d762 RS |
5559 | doc: /* Name of file for auto-saving current buffer. |
5560 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5561 | |
4b4deea2 | 5562 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5563 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5564 | |
4b4deea2 | 5565 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5566 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5567 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5568 | |
4b4deea2 | 5569 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5570 | make_number (LISP_INT_TAG), |
efc7e75f | 5571 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5572 | 0 initially. |
5573 | -1 means auto-saving turned off until next real save. | |
5574 | ||
5575 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5576 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5577 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5578 | |
4b4deea2 | 5579 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5580 | Qnil, |
7614d762 | 5581 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5582 | An integer N as value means display only lines |
5583 | that start with less than N columns of space. | |
7614d762 RS |
5584 | A value of t means that the character ^M makes itself and |
5585 | all the rest of the line invisible; also, when saving the buffer | |
5586 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5587 | |
5588 | #ifndef old | |
5589 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5590 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5591 | Qnil, |
3f676284 | 5592 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5593 | #endif |
5594 | ||
4b4deea2 | 5595 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5596 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5597 | The value should be one of `overwrite-mode-textual', |
5598 | `overwrite-mode-binary', or nil. | |
5599 | If it is `overwrite-mode-textual', self-insertion still | |
5600 | inserts at the end of a line, and inserts when point is before a tab, | |
5601 | until the tab is filled in. | |
5602 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5603 | ||
4b4deea2 | 5604 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5605 | Qnil, |
efc7e75f | 5606 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5607 | |
5608 | If this variable is nil, the value of `standard-display-table' is used. | |
5609 | Each window can have its own, overriding display table, see | |
5610 | `set-window-display-table' and `window-display-table'. | |
5611 | ||
5612 | The display table is a char-table created with `make-display-table'. | |
5613 | A char-table is an array indexed by character codes. Normal array | |
5614 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5615 | ||
5616 | Each of the char-table elements control how to display the corresponding | |
5617 | text character: the element at index C in the table says how to display | |
5618 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5619 | characters or nil. The value nil means display the character in the |
5620 | default fashion; otherwise, the characters from the vector are delivered | |
5621 | to the screen instead of the original character. | |
018ba359 | 5622 | |
5fd11dc8 | 5623 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5624 | to display a capital Y instead of each X character. |
018ba359 PJ |
5625 | |
5626 | In addition, a char-table has six extra slots to control the display of: | |
5627 | ||
5628 | the end of a truncated screen line (extra-slot 0, a single character); | |
5629 | the end of a continued line (extra-slot 1, a single character); | |
5630 | the escape character used to display character codes in octal | |
5631 | (extra-slot 2, a single character); | |
5632 | the character used as an arrow for control characters (extra-slot 3, | |
5633 | a single character); | |
5634 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5635 | a vector of characters); | |
5636 | the character used to draw the border between side-by-side windows | |
5637 | (extra-slot 5, a single character). | |
5638 | ||
5639 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5640 | |
4b4deea2 | 5641 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5642 | Qnil, |
fb7ada5f | 5643 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5644 | A value of nil means no marginal area. */); |
177c0ea7 | 5645 | |
4b4deea2 | 5646 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5647 | Qnil, |
fb7ada5f | 5648 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5649 | A value of nil means no marginal area. */); |
177c0ea7 | 5650 | |
4b4deea2 | 5651 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5652 | Qnil, |
fb7ada5f | 5653 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5654 | A value of 0 means no left fringe is shown in this buffer's window. |
5655 | A value of nil means to use the left fringe width from the window's frame. */); | |
5656 | ||
4b4deea2 | 5657 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5658 | Qnil, |
fb7ada5f | 5659 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5660 | A value of 0 means no right fringe is shown in this buffer's window. |
5661 | A value of nil means to use the right fringe width from the window's frame. */); | |
5662 | ||
4b4deea2 | 5663 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5664 | Qnil, |
fb7ada5f | 5665 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5666 | A value of nil means to display fringes between margins and buffer text. */); |
5667 | ||
4b4deea2 | 5668 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5669 | Qnil, |
fb7ada5f | 5670 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5671 | A value of nil means to use the scroll bar width from the window's frame. */); |
5672 | ||
4b4deea2 | 5673 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5674 | Qnil, |
fb7ada5f | 5675 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5676 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5677 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5678 | |
fc2c8887 RS |
5679 | A value of `left' or `right' means put the vertical scroll bar at that side |
5680 | of the window; a value of nil means don't show any vertical scroll bars. | |
5681 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5682 | |
0552666b | 5683 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5684 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5685 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5686 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5687 | window-systems. */); | |
177c0ea7 | 5688 | |
6b61353c | 5689 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5690 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5691 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5692 | If non-nil, the first and last line of the buffer are marked in the fringe |
5693 | of a window on window-systems with angle bitmaps, or if the window can be | |
5694 | scrolled, the top and bottom line of the window are marked with up and down | |
5695 | arrow bitmaps. | |
b2229037 KS |
5696 | |
5697 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5698 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5699 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5700 | the left fringe but no arrows. |
b2229037 | 5701 | |
79e3497d RS |
5702 | You can exercise more precise control by using an alist as the |
5703 | value. Each alist element (INDICATOR . POSITION) specifies | |
5704 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5705 | `bottom', `up', `down', or t, which specifies the default position, |
5706 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5707 | this indicator. | |
5708 | ||
5709 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5710 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5711 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5712 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5713 | |
c6a46372 | 5714 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5715 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5716 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5717 | The value is an alist where each element (INDICATOR . BITMAPS) |
5718 | specifies the fringe bitmaps used to display a specific logical | |
5719 | fringe indicator. | |
5720 | ||
5721 | INDICATOR specifies the logical indicator type which is one of the | |
5722 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5723 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5724 | |
14fb5704 | 5725 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5726 | the actual bitmap shown in the left or right fringe for the logical |
5727 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5728 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5729 | are used only for the `bottom' and `top-bottom' indicators when the |
5730 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5731 | symbol which is used in both left and right fringes. */); |
5732 | ||
5733 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5734 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5735 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5736 | The value is an alist where each element (CURSOR . BITMAP) |
5737 | specifies the fringe bitmaps used to display a specific logical | |
5738 | cursor type in the fringe. | |
5739 | ||
5740 | CURSOR specifies the logical cursor type which is one of the following | |
5741 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5742 | one is used to show a hollow cursor on narrow lines display lines | |
5743 | where the normal hollow cursor will not fit. | |
5744 | ||
5745 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5746 | cursor type. */); | |
5747 | ||
0552666b | 5748 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5749 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5750 | doc: /* How far to scroll windows upward. |
5751 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5752 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5753 | means scroll to center point. A fraction means scroll to put point |
5754 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5755 | When the value is 0.0, point goes at the bottom line, which in the |
5756 | simple case that you moved off with C-f means scrolling just one line. | |
5757 | 1.0 means point goes at the top, so that in that simple case, the | |
5758 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5759 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5760 | |
0552666b | 5761 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5762 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5763 | doc: /* How far to scroll windows downward. |
5764 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5765 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5766 | means scroll to center point. A fraction means scroll to put point |
5767 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5768 | When the value is 0.0, point goes at the top line, which in the |
5769 | simple case that you moved off with C-b means scrolling just one line. | |
5770 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5771 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5772 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5773 | |
1ab256cb RM |
5774 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5775 | "Don't ask."); | |
5776 | */ | |
1ab256cb | 5777 | |
29208e82 | 5778 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5779 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5780 | Two arguments are passed to each function: the positions of |
5781 | the beginning and end of the range of old text to be changed. | |
5782 | \(For an insertion, the beginning and end are at the same place.) | |
5783 | No information is given about the length of the text after the change. | |
5784 | ||
5785 | Buffer changes made while executing the `before-change-functions' | |
5786 | don't call any before-change or after-change functions. | |
7b2bf907 | 5787 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5788 | |
5789 | If an unhandled error happens in running these functions, | |
5790 | the variable's value remains nil. That prevents the error | |
5791 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5792 | Vbefore_change_functions = Qnil; |
5793 | ||
29208e82 | 5794 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5795 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5796 | Three arguments are passed to each function: the positions of |
5797 | the beginning and end of the range of changed text, | |
5798 | and the length in bytes of the pre-change text replaced by that range. | |
5799 | \(For an insertion, the pre-change length is zero; | |
5800 | for a deletion, that length is the number of bytes deleted, | |
5801 | and the post-change beginning and end are at the same place.) | |
5802 | ||
5803 | Buffer changes made while executing the `after-change-functions' | |
5804 | don't call any before-change or after-change functions. | |
7b2bf907 | 5805 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5806 | |
5807 | If an unhandled error happens in running these functions, | |
5808 | the variable's value remains nil. That prevents the error | |
5809 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5810 | Vafter_change_functions = Qnil; |
5811 | ||
29208e82 | 5812 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5813 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5814 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5815 | Vfirst_change_hook = Qnil; |
1ab256cb | 5816 | |
4b4deea2 | 5817 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5818 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5819 | Recent changes come first; older changes follow newer. |
5820 | ||
5821 | An entry (BEG . END) represents an insertion which begins at | |
5822 | position BEG and ends at position END. | |
5823 | ||
5824 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5825 | from (abs POSITION). If POSITION is positive, point was at the front | |
5826 | of the text being deleted; if negative, point was at the end. | |
5827 | ||
5828 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5829 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5830 | of the visited file's modification time, as of that time. If the | |
5831 | modification time of the most recent save is different, this entry is | |
5832 | obsolete. | |
5833 | ||
5834 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5835 | was modified between BEG and END. PROPERTY is the property name, | |
5836 | and VALUE is the old value. | |
5837 | ||
7405f386 KS |
5838 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5839 | \(apply FUN-NAME ARGS). | |
5840 | ||
5841 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5842 | in the active region. BEG and END is the range affected by this entry | |
5843 | and DELTA is the number of bytes added or deleted in that range by | |
5844 | this change. | |
c6c7dc03 | 5845 | |
018ba359 PJ |
5846 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5847 | was adjusted in position by the offset DISTANCE (an integer). | |
5848 | ||
5849 | An entry of the form POSITION indicates that point was at the buffer | |
5850 | location given by the integer. Undoing an entry of this form places | |
5851 | point at POSITION. | |
5852 | ||
b4c4f2f4 JB |
5853 | Entries with value `nil' mark undo boundaries. The undo command treats |
5854 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5855 | |
5856 | If the value of the variable is t, undo information is not recorded. */); | |
5857 | ||
4b4deea2 | 5858 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5859 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5860 | |
4b4deea2 | 5861 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5862 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5863 | |
5864 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5865 | newlines. Columnar operations (like `move-to-column' and |
5866 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5867 | widths as they go. This works well for ordinary text, but if the |
5868 | buffer's lines are very long (say, more than 500 characters), these | |
5869 | motion functions will take longer to execute. Emacs may also take | |
5870 | longer to update the display. | |
5871 | ||
5629f29b | 5872 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5873 | results of their scans, and consult the cache to avoid rescanning |
5874 | regions of the buffer until the text is modified. The caches are most | |
5875 | beneficial when they prevent the most searching---that is, when the | |
5876 | buffer contains long lines and large regions of characters with the | |
5877 | same, fixed screen width. | |
5878 | ||
5629f29b | 5879 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5880 | become slightly slower (because of the overhead of consulting the |
5881 | cache), and the caches will use memory roughly proportional to the | |
5882 | number of newlines and characters whose screen width varies. | |
5883 | ||
5884 | The caches require no explicit maintenance; their accuracy is | |
5885 | maintained internally by the Emacs primitives. Enabling or disabling | |
5886 | the cache should not affect the behavior of any of the motion | |
5887 | functions; it should only affect their performance. */); | |
5888 | ||
4b4deea2 | 5889 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5890 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5891 | |
4b4deea2 | 5892 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5893 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5894 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5895 | set when a file is visited. */); |
be9aafdd | 5896 | |
71ed49fa | 5897 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5898 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 5899 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
5900 | Should be a list of symbols naming formats that are defined in `format-alist'. |
5901 | If it is t, which is the default, auto-save files are written in the | |
5902 | same format as a regular save would use. */); | |
5903 | ||
3cb719bd | 5904 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5905 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5906 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5907 | The default is t, which means that text is invisible |
5908 | if it has a non-nil `invisible' property. | |
5909 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5910 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5911 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5912 | then characters with property value PROP are invisible, | |
5913 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5914 | |
7962a441 | 5915 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5916 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5917 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5918 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5919 | |
5920 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5921 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5922 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5923 | The function `set-window-buffer' updates this variable |
5924 | to the value obtained by calling `current-time'. | |
5925 | If the buffer has never been shown in a window, the value is nil. */); | |
5926 | ||
29208e82 | 5927 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5928 | doc: /* Non-nil if Transient Mark mode is enabled. |
5929 | See the command `transient-mark-mode' for a description of this minor mode. | |
5930 | ||
5931 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5932 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5933 | all windows or just the selected window. | |
5934 | ||
f49d1f52 | 5935 | Lisp programs may give this variable certain special values: |
9d794026 | 5936 | |
f49d1f52 SM |
5937 | - A value of `lambda' enables Transient Mark mode temporarily. |
5938 | It is disabled again after any subsequent action that would | |
5939 | normally deactivate the mark (e.g. buffer modification). | |
5940 | ||
5941 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5942 | temporarily. After any subsequent point motion command that is | |
5943 | not shift-translated, or any other action that would normally | |
5944 | deactivate the mark (e.g. buffer modification), the value of | |
5945 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5946 | Vtransient_mark_mode = Qnil; |
5947 | ||
29208e82 | 5948 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 5949 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5950 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5951 | text properties. If the value is a list, disregard `buffer-read-only' | |
5952 | and disregard a `read-only' text property if the property value | |
5953 | is a member of the list. */); | |
a96b68f1 RS |
5954 | Vinhibit_read_only = Qnil; |
5955 | ||
4b4deea2 | 5956 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5957 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5958 | Values are interpreted as follows: |
5959 | ||
b8dc613f JB |
5960 | t use the cursor specified for the frame |
5961 | nil don't display a cursor | |
5962 | box display a filled box cursor | |
5963 | hollow display a hollow box cursor | |
5964 | bar display a vertical bar cursor with default width | |
5965 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5966 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5967 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5968 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 5969 | |
e08b1705 MR |
5970 | When the buffer is displayed in a non-selected window, the |
5971 | cursor's appearance is instead controlled by the variable | |
5972 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 5973 | |
a3bbced0 | 5974 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 5975 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 5976 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
5977 | The space is measured in pixels, and put below lines on graphic displays, |
5978 | see `display-graphic-p'. | |
60ebfdf3 | 5979 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 5980 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 5981 | |
0124c5bd | 5982 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 5983 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 5984 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
5985 | If nil, only shows a cursor in the selected window. |
5986 | If t, displays a cursor related to the usual cursor type | |
5987 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
5988 | You can also specify the cursor type as in the `cursor-type' variable. | |
5989 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 5990 | |
29208e82 | 5991 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
5992 | doc: /* List of functions called with no args to query before killing a buffer. |
5993 | The buffer being killed will be current while the functions are running. | |
5994 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
5995 | Vkill_buffer_query_functions = Qnil; |
5996 | ||
29208e82 | 5997 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
5998 | doc: /* Normal hook run before changing the major mode of a buffer. |
5999 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6000 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6001 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6002 | |
9397e56f MR |
6003 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6004 | doc: /* Hook run when the buffer list changes. | |
6005 | Functions running this hook are `get-buffer-create', | |
6006 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6007 | and `bury-buffer-internal'. */); |
9397e56f | 6008 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6009 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6010 | |
0dc88e60 | 6011 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6012 | defsubr (&Sbuffer_list); |
6013 | defsubr (&Sget_buffer); | |
6014 | defsubr (&Sget_file_buffer); | |
6015 | defsubr (&Sget_buffer_create); | |
336cd056 | 6016 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6017 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6018 | defsubr (&Sbuffer_name); |
6019 | /*defsubr (&Sbuffer_number);*/ | |
6020 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6021 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6022 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6023 | defsubr (&Sbuffer_local_variables); |
6024 | defsubr (&Sbuffer_modified_p); | |
6025 | defsubr (&Sset_buffer_modified_p); | |
6026 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6027 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6028 | defsubr (&Srename_buffer); |
6029 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6030 | defsubr (&Sbuffer_enable_undo); |
6031 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6032 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6033 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6034 | defsubr (&Scurrent_buffer); |
6035 | defsubr (&Sset_buffer); | |
6036 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6037 | defsubr (&Serase_buffer); |
13cda5f9 | 6038 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6039 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6040 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6041 | |
52f8ec73 | 6042 | defsubr (&Soverlayp); |
2eec3b4e RS |
6043 | defsubr (&Smake_overlay); |
6044 | defsubr (&Sdelete_overlay); | |
6045 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6046 | defsubr (&Soverlay_start); |
6047 | defsubr (&Soverlay_end); | |
6048 | defsubr (&Soverlay_buffer); | |
6049 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6050 | defsubr (&Soverlays_at); |
74514898 | 6051 | defsubr (&Soverlays_in); |
2eec3b4e | 6052 | defsubr (&Snext_overlay_change); |
239c932b | 6053 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6054 | defsubr (&Soverlay_recenter); |
6055 | defsubr (&Soverlay_lists); | |
6056 | defsubr (&Soverlay_get); | |
6057 | defsubr (&Soverlay_put); | |
a8c21b48 | 6058 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6059 | } |
6060 | ||
dfcf069d | 6061 | void |
d3da34e0 | 6062 | keys_of_buffer (void) |
1ab256cb RM |
6063 | { |
6064 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6065 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6066 | |
6067 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6068 | initialized when that function gets called. */ | |
d67b4f80 | 6069 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6070 | } |