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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 | |
f57e2426 J |
110 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
111 | int after, Lisp_Object arg1, | |
112 | Lisp_Object arg2, Lisp_Object arg3); | |
113 | static void swap_out_buffer_local_variables (struct buffer *b); | |
114 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
115 | |
116 | /* Alist of all buffer names vs the buffers. */ | |
117 | /* This used to be a variable, but is no longer, | |
118 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
119 | Lisp_Object Vbuffer_alist; | |
120 | ||
955cbe7b | 121 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 122 | |
43ed3b8d | 123 | /* Hook run before changing a major mode. */ |
955cbe7b | 124 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 125 | |
dbc4e1c1 | 126 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
127 | Lisp_Object Qbefore_change_functions; |
128 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 129 | |
955cbe7b PE |
130 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
131 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 132 | |
955cbe7b | 133 | static Lisp_Object Qprotected_field; |
1ab256cb | 134 | |
955cbe7b | 135 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 136 | |
955cbe7b | 137 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 138 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 139 | |
955cbe7b | 140 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 141 | |
955cbe7b | 142 | static Lisp_Object Qoverlayp; |
52f8ec73 | 143 | |
955cbe7b | 144 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 145 | |
28545e04 | 146 | static Lisp_Object Qevaporate; |
5985d248 | 147 | |
294d215f RS |
148 | Lisp_Object Qmodification_hooks; |
149 | Lisp_Object Qinsert_in_front_hooks; | |
150 | Lisp_Object Qinsert_behind_hooks; | |
151 | ||
fd05c7e9 | 152 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
153 | static void free_buffer_text (struct buffer *b); |
154 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 155 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
f57e2426 | 156 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); |
b86af064 | 157 | |
1ab256cb RM |
158 | /* For debugging; temporary. See set_buffer_internal. */ |
159 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
160 | ||
01136e9b | 161 | void |
d3da34e0 | 162 | nsberror (Lisp_Object spec) |
1ab256cb | 163 | { |
a7a60ce9 | 164 | if (STRINGP (spec)) |
d5db4077 | 165 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
166 | error ("Invalid buffer argument"); |
167 | } | |
168 | \f | |
a7ca3326 | 169 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
170 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
171 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 172 | (Lisp_Object object) |
0dc88e60 | 173 | { |
4b4deea2 | 174 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
175 | ? Qt : Qnil); |
176 | } | |
177 | ||
08460cd4 | 178 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 179 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
180 | If the optional arg FRAME is a frame, we return the buffer list in the |
181 | proper order for that frame: the buffers show in FRAME come first, | |
182 | followed by the rest of the buffers. */) | |
5842a27b | 183 | (Lisp_Object frame) |
1ab256cb | 184 | { |
a18b8cb5 | 185 | Lisp_Object general; |
08460cd4 RS |
186 | general = Fmapcar (Qcdr, Vbuffer_alist); |
187 | ||
188 | if (FRAMEP (frame)) | |
189 | { | |
a18b8cb5 KL |
190 | Lisp_Object framelist, prevlist, tail; |
191 | Lisp_Object args[3]; | |
08460cd4 | 192 | |
b7826503 | 193 | CHECK_FRAME (frame); |
08460cd4 | 194 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f MR |
195 | prevlist = Fnreverse (Fcopy_sequence |
196 | (XFRAME (frame)->buried_buffer_list)); | |
08460cd4 | 197 | |
a18b8cb5 KL |
198 | /* Remove from GENERAL any buffer that duplicates one in |
199 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 200 | tail = framelist; |
a18b8cb5 | 201 | while (CONSP (tail)) |
08460cd4 | 202 | { |
7539e11f KR |
203 | general = Fdelq (XCAR (tail), general); |
204 | tail = XCDR (tail); | |
08460cd4 | 205 | } |
a18b8cb5 KL |
206 | tail = prevlist; |
207 | while (CONSP (tail)) | |
208 | { | |
209 | general = Fdelq (XCAR (tail), general); | |
210 | tail = XCDR (tail); | |
211 | } | |
212 | ||
213 | args[0] = framelist; | |
214 | args[1] = general; | |
215 | args[2] = prevlist; | |
216 | return Fnconc (3, args); | |
08460cd4 | 217 | } |
9397e56f MR |
218 | else |
219 | return general; | |
1ab256cb RM |
220 | } |
221 | ||
04ae1b48 RS |
222 | /* Like Fassoc, but use Fstring_equal to compare |
223 | (which ignores text properties), | |
224 | and don't ever QUIT. */ | |
225 | ||
226 | static Lisp_Object | |
d3da34e0 | 227 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
228 | { |
229 | register Lisp_Object tail; | |
6d70a280 | 230 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
231 | { |
232 | register Lisp_Object elt, tem; | |
6d70a280 | 233 | elt = XCAR (tail); |
04ae1b48 RS |
234 | tem = Fstring_equal (Fcar (elt), key); |
235 | if (!NILP (tem)) | |
236 | return elt; | |
237 | } | |
238 | return Qnil; | |
239 | } | |
240 | ||
a7ca3326 | 241 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
242 | doc: /* Return the buffer named BUFFER-OR-NAME. |
243 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
244 | is a string and there is no buffer with that name, return nil. If | |
245 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 246 | (register Lisp_Object buffer_or_name) |
1ab256cb | 247 | { |
c8804c4f MR |
248 | if (BUFFERP (buffer_or_name)) |
249 | return buffer_or_name; | |
250 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 251 | |
c8804c4f | 252 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
253 | } |
254 | ||
255 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 256 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
257 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
258 | If there is no such live buffer, return nil. | |
7ee72033 | 259 | See also `find-buffer-visiting'. */) |
5842a27b | 260 | (register Lisp_Object filename) |
1ab256cb RM |
261 | { |
262 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
263 | Lisp_Object handler; |
264 | ||
b7826503 | 265 | CHECK_STRING (filename); |
1ab256cb RM |
266 | filename = Fexpand_file_name (filename, Qnil); |
267 | ||
5fe0b67e RS |
268 | /* If the file name has special constructs in it, |
269 | call the corresponding file handler. */ | |
a617e913 | 270 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 271 | if (!NILP (handler)) |
a59225b1 CY |
272 | { |
273 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
274 | filename); | |
275 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
276 | } | |
5fe0b67e | 277 | |
7539e11f | 278 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 279 | { |
7539e11f | 280 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 281 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
282 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
283 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 284 | if (!NILP (tem)) |
1ab256cb RM |
285 | return buf; |
286 | } | |
287 | return Qnil; | |
288 | } | |
289 | ||
52e01189 | 290 | Lisp_Object |
d3da34e0 | 291 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
292 | { |
293 | register Lisp_Object tail, buf, tem; | |
294 | ||
7539e11f | 295 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 296 | { |
7539e11f | 297 | buf = Fcdr (XCAR (tail)); |
52e01189 | 298 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
299 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
300 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
301 | if (!NILP (tem)) |
302 | return buf; | |
303 | } | |
304 | return Qnil; | |
305 | } | |
306 | ||
a7ca3326 | 307 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
308 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
309 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
310 | return that buffer. If no such buffer exists, create a new buffer with | |
311 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
312 | buffer does not keep undo information. | |
313 | ||
314 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
315 | even if it is dead. The return value is never nil. */) | |
5842a27b | 316 | (register Lisp_Object buffer_or_name) |
1ab256cb | 317 | { |
cd265ca6 | 318 | register Lisp_Object buffer, name; |
1ab256cb RM |
319 | register struct buffer *b; |
320 | ||
cd265ca6 MR |
321 | buffer = Fget_buffer (buffer_or_name); |
322 | if (!NILP (buffer)) | |
323 | return buffer; | |
1ab256cb | 324 | |
cd265ca6 | 325 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
326 | error ("Empty string for buffer name is not allowed"); |
327 | ||
cc648cef | 328 | b = allocate_buffer (); |
1ab256cb | 329 | |
336cd056 RS |
330 | /* An ordinary buffer uses its own struct buffer_text. */ |
331 | b->text = &b->own_text; | |
332 | b->base_buffer = 0; | |
333 | ||
1ab256cb | 334 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 335 | BLOCK_INPUT; |
3b06f880 KH |
336 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
337 | anchoring a search. */ | |
b86af064 | 338 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 339 | UNBLOCK_INPUT; |
1ab256cb | 340 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 341 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 342 | |
cffc6f3b CY |
343 | b->pt = BEG; |
344 | b->begv = BEG; | |
345 | b->zv = BEG; | |
346 | b->pt_byte = BEG_BYTE; | |
347 | b->begv_byte = BEG_BYTE; | |
348 | b->zv_byte = BEG_BYTE; | |
349 | ||
6d70a280 | 350 | BUF_GPT (b) = BEG; |
6d70a280 | 351 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
352 | |
353 | BUF_Z (b) = BEG; | |
6d70a280 | 354 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 355 | BUF_MODIFF (b) = 1; |
3e145152 | 356 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 357 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
358 | BUF_SAVE_MODIFF (b) = 1; |
359 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
360 | BUF_UNCHANGED_MODIFIED (b) = 1; |
361 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
362 | BUF_END_UNCHANGED (b) = 0; | |
363 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 364 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 365 | b->text->inhibit_shrinking = 0; |
1ab256cb | 366 | |
28e969dd JB |
367 | b->newline_cache = 0; |
368 | b->width_run_cache = 0; | |
4b4deea2 | 369 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 370 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 371 | |
1ab256cb | 372 | /* Put this on the chain of all buffers including killed ones. */ |
eab3844f | 373 | b->header.next.buffer = all_buffers; |
1ab256cb RM |
374 | all_buffers = b; |
375 | ||
336cd056 RS |
376 | /* An ordinary buffer normally doesn't need markers |
377 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
378 | BVAR (b, pt_marker) = Qnil; |
379 | BVAR (b, begv_marker) = Qnil; | |
380 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 381 | |
cd265ca6 | 382 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 383 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 384 | BVAR (b, name) = name; |
04ae1b48 | 385 | |
4b4deea2 | 386 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
387 | |
388 | reset_buffer (b); | |
13de9290 | 389 | reset_buffer_local_variables (b, 1); |
1ab256cb | 390 | |
4b4deea2 | 391 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 392 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 393 | |
1ab256cb | 394 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
395 | XSETBUFFER (buffer, b); |
396 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
397 | /* And run buffer-list-update-hook. */ |
398 | if (!NILP (Vrun_hooks)) | |
399 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 400 | |
cd265ca6 | 401 | return buffer; |
336cd056 RS |
402 | } |
403 | ||
7e9d5818 | 404 | |
04e4cb3a GM |
405 | /* Return a list of overlays which is a copy of the overlay list |
406 | LIST, but for buffer B. */ | |
407 | ||
2410d73a | 408 | static struct Lisp_Overlay * |
d3da34e0 | 409 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 410 | { |
2410d73a SM |
411 | Lisp_Object buffer; |
412 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
413 | |
414 | XSETBUFFER (buffer, b); | |
415 | ||
2410d73a | 416 | for (; list; list = list->next) |
04e4cb3a GM |
417 | { |
418 | Lisp_Object overlay, start, end, old_overlay; | |
d311d28c | 419 | ptrdiff_t charpos; |
04e4cb3a | 420 | |
2410d73a | 421 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
422 | charpos = marker_position (OVERLAY_START (old_overlay)); |
423 | start = Fmake_marker (); | |
db3a49a6 | 424 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
425 | XMARKER (start)->insertion_type |
426 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
427 | ||
428 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
429 | end = Fmake_marker (); | |
db3a49a6 | 430 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
431 | XMARKER (end)->insertion_type |
432 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
433 | ||
434 | overlay = allocate_misc (); | |
435 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
436 | OVERLAY_START (overlay) = start; | |
437 | OVERLAY_END (overlay) = end; | |
438 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 439 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 440 | |
2410d73a SM |
441 | if (tail) |
442 | tail = tail->next = XOVERLAY (overlay); | |
443 | else | |
444 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
445 | } |
446 | ||
2410d73a | 447 | return result; |
04e4cb3a | 448 | } |
177c0ea7 | 449 | |
04e4cb3a | 450 | |
7e9d5818 GM |
451 | /* Clone per-buffer values of buffer FROM. |
452 | ||
453 | Buffer TO gets the same per-buffer values as FROM, with the | |
454 | following exceptions: (1) TO's name is left untouched, (2) markers | |
455 | are copied and made to refer to TO, and (3) overlay lists are | |
456 | copied. */ | |
457 | ||
458 | static void | |
d3da34e0 | 459 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 460 | { |
7e9d5818 GM |
461 | int offset; |
462 | ||
36429c89 | 463 | for_each_per_buffer_object_at (offset) |
7e9d5818 GM |
464 | { |
465 | Lisp_Object obj; | |
466 | ||
4b7cdc0e SM |
467 | /* Don't touch the `name' which should be unique for every buffer. */ |
468 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
469 | continue; | |
470 | ||
7e9d5818 | 471 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 472 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
473 | { |
474 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
475 | |
476 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 477 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
478 | } |
479 | ||
480 | PER_BUFFER_VALUE (to, offset) = obj; | |
481 | } | |
482 | ||
72af86bd | 483 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 484 | |
04e4cb3a GM |
485 | to->overlays_before = copy_overlays (to, from->overlays_before); |
486 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 487 | |
e1688f54 RS |
488 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
489 | and install that in TO. */ | |
4b4deea2 | 490 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
491 | } |
492 | ||
cffc6f3b CY |
493 | |
494 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
495 | current, update these markers. */ | |
496 | ||
497 | static void | |
498 | record_buffer_markers (struct buffer *b) | |
499 | { | |
500 | if (! NILP (BVAR (b, pt_marker))) | |
501 | { | |
502 | Lisp_Object buffer; | |
503 | ||
504 | eassert (!NILP (BVAR (b, begv_marker))); | |
505 | eassert (!NILP (BVAR (b, zv_marker))); | |
506 | ||
507 | XSETBUFFER (buffer, b); | |
508 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
509 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
510 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
511 | } | |
512 | } | |
513 | ||
514 | ||
515 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
516 | current, fetch these values into B->begv etc. */ | |
517 | ||
518 | static void | |
519 | fetch_buffer_markers (struct buffer *b) | |
520 | { | |
521 | if (! NILP (BVAR (b, pt_marker))) | |
522 | { | |
523 | Lisp_Object m; | |
524 | ||
525 | eassert (!NILP (BVAR (b, begv_marker))); | |
526 | eassert (!NILP (BVAR (b, zv_marker))); | |
527 | ||
528 | m = BVAR (b, pt_marker); | |
529 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
530 | ||
531 | m = BVAR (b, begv_marker); | |
532 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
533 | ||
534 | m = BVAR (b, zv_marker); | |
535 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
536 | } | |
537 | } | |
538 | ||
539 | ||
7e9d5818 GM |
540 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
541 | 2, 3, | |
193c3837 | 542 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 543 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 544 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
545 | NAME should be a string which is not the name of an existing buffer. |
546 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
547 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 548 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 549 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 550 | { |
6b61353c | 551 | Lisp_Object buf, tem; |
7e9d5818 | 552 | struct buffer *b; |
336cd056 | 553 | |
6b61353c | 554 | CHECK_STRING (name); |
336cd056 RS |
555 | buf = Fget_buffer (name); |
556 | if (!NILP (buf)) | |
d5db4077 | 557 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 558 | |
6b61353c | 559 | tem = base_buffer; |
336cd056 RS |
560 | base_buffer = Fget_buffer (base_buffer); |
561 | if (NILP (base_buffer)) | |
6b61353c | 562 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 563 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 564 | error ("Base buffer has been killed"); |
336cd056 | 565 | |
d5db4077 | 566 | if (SCHARS (name) == 0) |
336cd056 RS |
567 | error ("Empty string for buffer name is not allowed"); |
568 | ||
cc648cef | 569 | b = allocate_buffer (); |
336cd056 | 570 | |
67ee9f6e SM |
571 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
572 | ? XBUFFER (base_buffer)->base_buffer | |
573 | : XBUFFER (base_buffer)); | |
336cd056 RS |
574 | |
575 | /* Use the base buffer's text object. */ | |
576 | b->text = b->base_buffer->text; | |
577 | ||
cffc6f3b CY |
578 | b->pt = b->base_buffer->pt; |
579 | b->begv = b->base_buffer->begv; | |
580 | b->zv = b->base_buffer->zv; | |
581 | b->pt_byte = b->base_buffer->pt_byte; | |
582 | b->begv_byte = b->base_buffer->begv_byte; | |
583 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
584 | |
585 | b->newline_cache = 0; | |
586 | b->width_run_cache = 0; | |
4b4deea2 | 587 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
588 | |
589 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 590 | b->header.next.buffer = all_buffers; |
336cd056 RS |
591 | all_buffers = b; |
592 | ||
593 | name = Fcopy_sequence (name); | |
ab77f05c | 594 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 595 | BVAR (b, name) = name; |
336cd056 RS |
596 | |
597 | reset_buffer (b); | |
13de9290 | 598 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
599 | |
600 | /* Put this in the alist of all live buffers. */ | |
601 | XSETBUFFER (buf, b); | |
602 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
603 | ||
4b4deea2 | 604 | BVAR (b, mark) = Fmake_marker (); |
336cd056 | 605 | |
abc9d959 | 606 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 607 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 608 | |
336cd056 | 609 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 610 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 611 | { |
2aa46d6c CY |
612 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
613 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 614 | |
657924ff DA |
615 | BVAR (b->base_buffer, pt_marker) |
616 | = build_marker (b->base_buffer, b->base_buffer->pt, b->base_buffer->pt_byte); | |
617 | ||
618 | BVAR (b->base_buffer, begv_marker) | |
619 | = build_marker (b->base_buffer, b->base_buffer->begv, b->base_buffer->begv_byte); | |
cffc6f3b | 620 | |
657924ff DA |
621 | BVAR (b->base_buffer, zv_marker) |
622 | = build_marker (b->base_buffer, b->base_buffer->zv, b->base_buffer->zv_byte); | |
cffc6f3b | 623 | |
4b4deea2 | 624 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
625 | } |
626 | ||
7e9d5818 GM |
627 | if (NILP (clone)) |
628 | { | |
629 | /* Give the indirect buffer markers for its narrowing. */ | |
657924ff DA |
630 | BVAR (b, pt_marker) = build_marker (b, b->pt, b->pt_byte); |
631 | BVAR (b, begv_marker) = build_marker (b, b->begv, b->begv_byte); | |
632 | BVAR (b, zv_marker) = build_marker (b, b->zv, b->zv_byte); | |
4b4deea2 | 633 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
634 | } |
635 | else | |
7fa57e45 RS |
636 | { |
637 | struct buffer *old_b = current_buffer; | |
638 | ||
639 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
640 | BVAR (b, filename) = Qnil; |
641 | BVAR (b, file_truename) = Qnil; | |
642 | BVAR (b, display_count) = make_number (0); | |
643 | BVAR (b, backed_up) = Qnil; | |
644 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
645 | set_buffer_internal_1 (b); |
646 | Fset (intern ("buffer-save-without-query"), Qnil); | |
647 | Fset (intern ("buffer-file-number"), Qnil); | |
648 | Fset (intern ("buffer-stale-function"), Qnil); | |
649 | set_buffer_internal_1 (old_b); | |
650 | } | |
336cd056 | 651 | |
9397e56f MR |
652 | /* Run buffer-list-update-hook. */ |
653 | if (!NILP (Vrun_hooks)) | |
654 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
655 | ||
a9ee7a59 | 656 | return buf; |
1ab256cb RM |
657 | } |
658 | ||
041a49a6 DA |
659 | /* Mark OV as no longer associated with B. */ |
660 | ||
661 | static void | |
662 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
663 | { | |
664 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); | |
665 | modify_overlay (b, marker_position (ov->start), marker_position (ov->end)); | |
666 | Fset_marker (ov->start, Qnil, Qnil); | |
667 | Fset_marker (ov->end, Qnil, Qnil); | |
668 | ||
669 | } | |
670 | ||
671 | /* Delete all overlays of B and reset it's overlay lists. */ | |
672 | ||
d4f5719a | 673 | void |
d3da34e0 | 674 | delete_all_overlays (struct buffer *b) |
d4f5719a | 675 | { |
041a49a6 | 676 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 677 | |
041a49a6 | 678 | for (ov = b->overlays_before; ov; ov = next) |
d4f5719a | 679 | { |
041a49a6 DA |
680 | drop_overlay (b, ov); |
681 | next = ov->next; | |
682 | ov->next = NULL; | |
d4f5719a | 683 | } |
041a49a6 DA |
684 | |
685 | for (ov = b->overlays_after; ov; ov = next) | |
d4f5719a | 686 | { |
041a49a6 DA |
687 | drop_overlay (b, ov); |
688 | next = ov->next; | |
689 | ov->next = NULL; | |
d4f5719a | 690 | } |
041a49a6 DA |
691 | |
692 | b->overlays_before = b->overlays_after = NULL; | |
d4f5719a SM |
693 | } |
694 | ||
bcd40520 | 695 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 696 | and local variables. |
d4f5719a SM |
697 | If called on an already-initialized buffer, the list of overlays |
698 | should be deleted before calling this function, otherwise we end up | |
699 | with overlays that claim to belong to the buffer but the buffer | |
700 | claims it doesn't belong to it. */ | |
1ab256cb RM |
701 | |
702 | void | |
d3da34e0 | 703 | reset_buffer (register struct buffer *b) |
1ab256cb | 704 | { |
4b4deea2 TT |
705 | BVAR (b, filename) = Qnil; |
706 | BVAR (b, file_truename) = Qnil; | |
707 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
d35af63c | 708 | EMACS_SET_SECS_NSECS (b->modtime, 0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 709 | b->modtime_size = -1; |
4b4deea2 | 710 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 711 | b->last_window_start = 1; |
8b264726 | 712 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
713 | b->clip_changed = 0; |
714 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 715 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 716 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 717 | b->auto_save_failure_time = 0; |
4b4deea2 TT |
718 | BVAR (b, auto_save_file_name) = Qnil; |
719 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
720 | b->overlays_before = NULL; |
721 | b->overlays_after = NULL; | |
c2d5b10f | 722 | b->overlay_center = BEG; |
4b4deea2 TT |
723 | BVAR (b, mark_active) = Qnil; |
724 | BVAR (b, point_before_scroll) = Qnil; | |
725 | BVAR (b, file_format) = Qnil; | |
726 | BVAR (b, auto_save_file_format) = Qt; | |
727 | BVAR (b, last_selected_window) = Qnil; | |
728 | XSETINT (BVAR (b, display_count), 0); | |
729 | BVAR (b, display_time) = Qnil; | |
730 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
731 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
732 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
733 | |
734 | b->display_error_modiff = 0; | |
1ab256cb RM |
735 | } |
736 | ||
bcd40520 RS |
737 | /* Reset buffer B's local variables info. |
738 | Don't use this on a buffer that has already been in use; | |
739 | it does not treat permanent locals consistently. | |
13de9290 RS |
740 | Instead, use Fkill_all_local_variables. |
741 | ||
3709505e | 742 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
743 | buffer-local variables. If PERMANENT_TOO is 0, |
744 | we preserve those. */ | |
bcd40520 | 745 | |
13de9290 | 746 | static void |
d3da34e0 | 747 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
748 | { |
749 | register int offset; | |
7c02e886 | 750 | int i; |
1ab256cb RM |
751 | |
752 | /* Reset the major mode to Fundamental, together with all the | |
753 | things that depend on the major mode. | |
754 | default-major-mode is handled at a higher level. | |
755 | We ignore it here. */ | |
4b4deea2 TT |
756 | BVAR (b, major_mode) = Qfundamental_mode; |
757 | BVAR (b, keymap) = Qnil; | |
758 | BVAR (b, mode_name) = QSFundamental; | |
759 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
760 | |
761 | /* If the standard case table has been altered and invalidated, | |
762 | fix up its insides first. */ | |
763 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
764 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
765 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
766 | Fset_standard_case_table (Vascii_downcase_table); | |
767 | ||
4b4deea2 TT |
768 | BVAR (b, downcase_table) = Vascii_downcase_table; |
769 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
770 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
771 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
772 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 773 | |
13de9290 | 774 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 775 | if (permanent_too) |
4b4deea2 | 776 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
777 | else |
778 | { | |
2f7a359d | 779 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 780 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 781 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
782 | { |
783 | /* If permanent-local, keep it. */ | |
784 | last = tmp; | |
785 | if (EQ (prop, Qpermanent_local_hook)) | |
786 | { | |
787 | /* This is a partially permanent hook variable. | |
788 | Preserve only the elements that want to be preserved. */ | |
789 | Lisp_Object list, newlist; | |
790 | list = XCDR (XCAR (tmp)); | |
791 | if (!CONSP (list)) | |
792 | newlist = list; | |
793 | else | |
794 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
795 | { | |
796 | Lisp_Object elt = XCAR (list); | |
797 | /* Preserve element ELT if it's t, | |
798 | if it is a function with a `permanent-local-hook' property, | |
799 | or if it's not a symbol. */ | |
800 | if (! SYMBOLP (elt) | |
801 | || EQ (elt, Qt) | |
802 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
803 | newlist = Fcons (elt, newlist); | |
804 | } | |
805 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
806 | } | |
807 | } | |
808 | /* Delete this local variable. */ | |
3709505e | 809 | else if (NILP (last)) |
4b4deea2 | 810 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
811 | else |
812 | XSETCDR (last, XCDR (tmp)); | |
813 | } | |
814 | ||
7313acd0 | 815 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 816 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 817 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 818 | |
36429c89 DA |
819 | /* For each slot that has a default value, copy that into the slot. */ |
820 | for_each_per_buffer_object_at (offset) | |
aab80822 | 821 | { |
7313acd0 | 822 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
823 | if ((idx > 0 |
824 | && (permanent_too | |
ce5b453a | 825 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 826 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 827 | } |
1ab256cb RM |
828 | } |
829 | ||
01050cb5 RM |
830 | /* We split this away from generate-new-buffer, because rename-buffer |
831 | and set-visited-file-name ought to be able to use this to really | |
832 | rename the buffer properly. */ | |
833 | ||
a7ca3326 | 834 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 835 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 836 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
837 | If there is no live buffer named NAME, then return NAME. |
838 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 839 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 840 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
841 | it is in the sequence to be tried) even if a buffer with that name exists. |
842 | ||
843 | If NAME begins with a space (i.e., a buffer that is not normally | |
844 | visible to users), then if buffer NAME already exists a random number | |
845 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 846 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 847 | { |
8e4fd1e1 | 848 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
849 | ptrdiff_t count; |
850 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 851 | |
b7826503 | 852 | CHECK_STRING (name); |
1ab256cb | 853 | |
6b61353c KH |
854 | tem = Fstring_equal (name, ignore); |
855 | if (!NILP (tem)) | |
856 | return name; | |
1ab256cb | 857 | tem = Fget_buffer (name); |
265a9e55 | 858 | if (NILP (tem)) |
01050cb5 | 859 | return name; |
1ab256cb | 860 | |
8e4fd1e1 GM |
861 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
862 | { | |
863 | /* Note fileio.c:make_temp_name does random differently. */ | |
dea7f1e5 | 864 | sprintf (number, "-%"pI"d", XFASTINT (Frandom (make_number (999999)))); |
8e4fd1e1 GM |
865 | tem2 = concat2 (name, build_string (number)); |
866 | tem = Fget_buffer (tem2); | |
867 | if (NILP (tem)) | |
868 | return tem2; | |
869 | } | |
870 | else | |
871 | tem2 = name; | |
872 | ||
1ab256cb RM |
873 | count = 1; |
874 | while (1) | |
875 | { | |
d311d28c | 876 | sprintf (number, "<%"pD"d>", ++count); |
8e4fd1e1 | 877 | gentemp = concat2 (tem2, build_string (number)); |
638e4fc3 | 878 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
879 | if (!NILP (tem)) |
880 | return gentemp; | |
1ab256cb | 881 | tem = Fget_buffer (gentemp); |
265a9e55 | 882 | if (NILP (tem)) |
01050cb5 | 883 | return gentemp; |
1ab256cb RM |
884 | } |
885 | } | |
886 | ||
887 | \f | |
a7ca3326 | 888 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 889 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
890 | BUFFER defaults to the current buffer. |
891 | Return nil if BUFFER has been killed. */) | |
5842a27b | 892 | (register Lisp_Object buffer) |
1ab256cb | 893 | { |
265a9e55 | 894 | if (NILP (buffer)) |
4b4deea2 | 895 | return BVAR (current_buffer, name); |
b7826503 | 896 | CHECK_BUFFER (buffer); |
4b4deea2 | 897 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
898 | } |
899 | ||
a7ca3326 | 900 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
901 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
902 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 903 | (register Lisp_Object buffer) |
1ab256cb | 904 | { |
265a9e55 | 905 | if (NILP (buffer)) |
4b4deea2 | 906 | return BVAR (current_buffer, filename); |
b7826503 | 907 | CHECK_BUFFER (buffer); |
4b4deea2 | 908 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
909 | } |
910 | ||
336cd056 RS |
911 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
912 | 0, 1, 0, | |
7ee72033 | 913 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
914 | If BUFFER is not indirect, return nil. |
915 | BUFFER defaults to the current buffer. */) | |
5842a27b | 916 | (register Lisp_Object buffer) |
336cd056 RS |
917 | { |
918 | struct buffer *base; | |
919 | Lisp_Object base_buffer; | |
920 | ||
921 | if (NILP (buffer)) | |
922 | base = current_buffer->base_buffer; | |
923 | else | |
924 | { | |
b7826503 | 925 | CHECK_BUFFER (buffer); |
336cd056 RS |
926 | base = XBUFFER (buffer)->base_buffer; |
927 | } | |
928 | ||
929 | if (! base) | |
930 | return Qnil; | |
931 | XSETBUFFER (base_buffer, base); | |
932 | return base_buffer; | |
933 | } | |
934 | ||
a7ca3326 | 935 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 936 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
937 | doc: /* Return the value of VARIABLE in BUFFER. |
938 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 939 | is the default binding of the variable. */) |
5842a27b | 940 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
941 | { |
942 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
943 | ||
944 | if (EQ (result, Qunbound)) | |
945 | xsignal1 (Qvoid_variable, variable); | |
946 | ||
947 | return result; | |
948 | } | |
949 | ||
950 | ||
951 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
952 | locally unbound. */ | |
953 | ||
954 | Lisp_Object | |
955 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
956 | { |
957 | register struct buffer *buf; | |
958 | register Lisp_Object result; | |
ad97b375 | 959 | struct Lisp_Symbol *sym; |
79aa712d | 960 | |
5e2ad10b | 961 | CHECK_SYMBOL (variable); |
ae69175b | 962 | CHECK_BUFFER (buffer); |
79aa712d | 963 | buf = XBUFFER (buffer); |
ce5b453a | 964 | sym = XSYMBOL (variable); |
79aa712d | 965 | |
ce5b453a SM |
966 | start: |
967 | switch (sym->redirect) | |
f0bac7de | 968 | { |
ce5b453a SM |
969 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
970 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
971 | case SYMBOL_LOCALIZED: | |
972 | { /* Look in local_var_alist. */ | |
973 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
974 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 975 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
976 | if (!NILP (result)) |
977 | { | |
978 | if (blv->fwd) | |
979 | { /* What binding is loaded right now? */ | |
980 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 981 | |
ce5b453a SM |
982 | /* The value of the currently loaded binding is not |
983 | stored in it, but rather in the realvalue slot. | |
984 | Store that value into the binding it belongs to | |
985 | in case that is the one we are about to use. */ | |
f0bac7de | 986 | |
ce5b453a SM |
987 | XSETCDR (current_alist_element, |
988 | do_symval_forwarding (blv->fwd)); | |
989 | } | |
990 | /* Now get the (perhaps updated) value out of the binding. */ | |
991 | result = XCDR (result); | |
992 | } | |
993 | else | |
994 | result = Fdefault_value (variable); | |
995 | break; | |
996 | } | |
997 | case SYMBOL_FORWARDED: | |
998 | { | |
999 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1000 | if (BUFFER_OBJFWDP (fwd)) | |
1001 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
1002 | else | |
1003 | result = Fdefault_value (variable); | |
1004 | break; | |
1005 | } | |
1006 | default: abort (); | |
f0bac7de | 1007 | } |
79aa712d | 1008 | |
5f2c76c6 | 1009 | return result; |
79aa712d RS |
1010 | } |
1011 | ||
e1688f54 | 1012 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1013 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
1014 | in special slots in the buffer object. */ |
1015 | ||
1016 | static Lisp_Object | |
d3da34e0 | 1017 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
1018 | { |
1019 | Lisp_Object result = Qnil; | |
1020 | register Lisp_Object tail; | |
4b4deea2 | 1021 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1022 | { |
1023 | Lisp_Object val, elt; | |
1024 | ||
1025 | elt = XCAR (tail); | |
1026 | ||
1027 | /* Reference each variable in the alist in buf. | |
1028 | If inquiring about the current buffer, this gets the current values, | |
1029 | so store them into the alist so the alist is up to date. | |
1030 | If inquiring about some other buffer, this swaps out any values | |
1031 | for that buffer, making the alist up to date automatically. */ | |
1032 | val = find_symbol_value (XCAR (elt)); | |
1033 | /* Use the current buffer value only if buf is the current buffer. */ | |
1034 | if (buf != current_buffer) | |
1035 | val = XCDR (elt); | |
1036 | ||
0992bd9c CY |
1037 | result = Fcons (EQ (val, Qunbound) |
1038 | ? XCAR (elt) | |
1039 | : Fcons (XCAR (elt), val), | |
1040 | result); | |
e1688f54 RS |
1041 | } |
1042 | ||
1043 | return result; | |
1044 | } | |
1045 | ||
1ab256cb | 1046 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1047 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1048 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1049 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1050 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1051 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1052 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1053 | (register Lisp_Object buffer) |
1ab256cb RM |
1054 | { |
1055 | register struct buffer *buf; | |
553defa4 | 1056 | register Lisp_Object result; |
1ab256cb | 1057 | |
265a9e55 | 1058 | if (NILP (buffer)) |
1ab256cb RM |
1059 | buf = current_buffer; |
1060 | else | |
1061 | { | |
b7826503 | 1062 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1063 | buf = XBUFFER (buffer); |
1064 | } | |
1065 | ||
e1688f54 | 1066 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1067 | |
1ab256cb RM |
1068 | /* Add on all the variables stored in special slots. */ |
1069 | { | |
7c02e886 | 1070 | int offset, idx; |
1ab256cb | 1071 | |
36429c89 | 1072 | for_each_per_buffer_object_at (offset) |
1ab256cb | 1073 | { |
7313acd0 GM |
1074 | idx = PER_BUFFER_IDX (offset); |
1075 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1076 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1077 | { |
1078 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1079 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1080 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1081 | result); | |
1082 | } | |
1ab256cb RM |
1083 | } |
1084 | } | |
553defa4 RS |
1085 | |
1086 | return result; | |
1ab256cb | 1087 | } |
1ab256cb | 1088 | \f |
a7ca3326 | 1089 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1090 | 0, 1, 0, |
7ee72033 MB |
1091 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1092 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1093 | (register Lisp_Object buffer) |
1ab256cb RM |
1094 | { |
1095 | register struct buffer *buf; | |
265a9e55 | 1096 | if (NILP (buffer)) |
1ab256cb RM |
1097 | buf = current_buffer; |
1098 | else | |
1099 | { | |
b7826503 | 1100 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1101 | buf = XBUFFER (buffer); |
1102 | } | |
1103 | ||
336cd056 | 1104 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1105 | } |
1106 | ||
a7ca3326 | 1107 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1108 | 1, 1, 0, |
7ee72033 MB |
1109 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1110 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1111 | (register Lisp_Object flag) |
1ab256cb RM |
1112 | { |
1113 | register int already; | |
1114 | register Lisp_Object fn; | |
8ec01c70 | 1115 | Lisp_Object buffer, window; |
1ab256cb RM |
1116 | |
1117 | #ifdef CLASH_DETECTION | |
1118 | /* If buffer becoming modified, lock the file. | |
1119 | If buffer becoming unmodified, unlock the file. */ | |
1120 | ||
4b4deea2 | 1121 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1122 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1123 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1124 | { |
336cd056 | 1125 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1126 | if (!already && !NILP (flag)) |
1ab256cb | 1127 | lock_file (fn); |
265a9e55 | 1128 | else if (already && NILP (flag)) |
1ab256cb RM |
1129 | unlock_file (fn); |
1130 | } | |
1131 | #endif /* CLASH_DETECTION */ | |
1132 | ||
0b5397c2 SM |
1133 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1134 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1135 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1136 | modify SAVE_MODIFF to affect one, we may affect the other | |
1137 | as well. | |
1138 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1139 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1140 | recent-auto-save-p from t to nil. | |
1141 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1142 | we risk changing recent-auto-save-p from nil to t. */ | |
1143 | SAVE_MODIFF = (NILP (flag) | |
1144 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1145 | ? MODIFF | |
1146 | /* Let's try to preserve recent-auto-save-p. */ | |
1147 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1148 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1149 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1150 | or increase MODIFF. */ | |
1151 | : MODIFF++); | |
177c0ea7 | 1152 | |
8ec01c70 GM |
1153 | /* Set update_mode_lines only if buffer is displayed in some window. |
1154 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1155 | state by recording/restoring the state around blocks of code. | |
1156 | Setting update_mode_lines makes redisplay consider all windows | |
1157 | (on all frames). Stealth fontification of buffers not displayed | |
1158 | would incur additional redisplay costs if we'd set | |
1159 | update_modes_lines unconditionally. | |
1160 | ||
1161 | Ideally, I think there should be another mechanism for fontifying | |
1162 | buffers without "modifying" buffers, or redisplay should be | |
1163 | smarter about updating the `*' in mode lines. --gerd */ | |
1164 | XSETBUFFER (buffer, current_buffer); | |
1165 | window = Fget_buffer_window (buffer, Qt); | |
1166 | if (WINDOWP (window)) | |
d57b83b3 GM |
1167 | { |
1168 | ++update_mode_lines; | |
1169 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1170 | } | |
177c0ea7 | 1171 | |
1ab256cb RM |
1172 | return flag; |
1173 | } | |
1174 | ||
a8c21b48 GM |
1175 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1176 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1177 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1178 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1179 | state of the current buffer. Use with care. */) |
5842a27b | 1180 | (Lisp_Object flag) |
a8c21b48 GM |
1181 | { |
1182 | #ifdef CLASH_DETECTION | |
1183 | Lisp_Object fn; | |
177c0ea7 | 1184 | |
a8c21b48 GM |
1185 | /* If buffer becoming modified, lock the file. |
1186 | If buffer becoming unmodified, unlock the file. */ | |
1187 | ||
4b4deea2 | 1188 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1189 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1190 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1191 | { |
1192 | int already = SAVE_MODIFF < MODIFF; | |
1193 | if (!already && !NILP (flag)) | |
1194 | lock_file (fn); | |
1195 | else if (already && NILP (flag)) | |
1196 | unlock_file (fn); | |
1197 | } | |
1198 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1199 | |
a8c21b48 GM |
1200 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1201 | return flag; | |
1202 | } | |
1203 | ||
1ab256cb | 1204 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1205 | 0, 1, 0, |
7ee72033 | 1206 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1207 | Each buffer has a tick counter which is incremented each time the |
1208 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1209 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1210 | (register Lisp_Object buffer) |
1ab256cb RM |
1211 | { |
1212 | register struct buffer *buf; | |
265a9e55 | 1213 | if (NILP (buffer)) |
1ab256cb RM |
1214 | buf = current_buffer; |
1215 | else | |
1216 | { | |
b7826503 | 1217 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1218 | buf = XBUFFER (buffer); |
1219 | } | |
1220 | ||
1221 | return make_number (BUF_MODIFF (buf)); | |
1222 | } | |
3e145152 CY |
1223 | |
1224 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1225 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1226 | doc: /* Return BUFFER's character-change tick counter. | |
1227 | Each buffer has a character-change tick counter, which is set to the | |
1228 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1229 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1230 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1231 | you can tell whether a character change occurred in that buffer in |
1232 | between these calls. No argument or nil as argument means use current | |
1233 | buffer as BUFFER. */) | |
5842a27b | 1234 | (register Lisp_Object buffer) |
3e145152 CY |
1235 | { |
1236 | register struct buffer *buf; | |
1237 | if (NILP (buffer)) | |
1238 | buf = current_buffer; | |
1239 | else | |
1240 | { | |
1241 | CHECK_BUFFER (buffer); | |
1242 | buf = XBUFFER (buffer); | |
1243 | } | |
1244 | ||
1245 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1246 | } | |
1ab256cb | 1247 | \f |
01050cb5 | 1248 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1249 | "(list (read-string \"Rename buffer (to new name): \" \ |
1250 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1251 | current-prefix-arg)", | |
7ee72033 | 1252 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1253 | If second arg UNIQUE is nil or omitted, it is an error if a |
1254 | buffer named NEWNAME already exists. | |
1255 | If UNIQUE is non-nil, come up with a new name using | |
1256 | `generate-new-buffer-name'. | |
1257 | Interactively, you can set UNIQUE with a prefix argument. | |
1258 | We return the name we actually gave the buffer. | |
7ee72033 | 1259 | This does not change the name of the visited file (if any). */) |
5842a27b | 1260 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1261 | { |
1262 | register Lisp_Object tem, buf; | |
1263 | ||
b7826503 | 1264 | CHECK_STRING (newname); |
d59698c4 | 1265 | |
d5db4077 | 1266 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1267 | error ("Empty string is invalid as a buffer name"); |
1268 | ||
489c043a | 1269 | tem = Fget_buffer (newname); |
265a9e55 | 1270 | if (!NILP (tem)) |
01050cb5 | 1271 | { |
8801a864 KR |
1272 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1273 | rename the buffer automatically so you can create another | |
1274 | with the original name. It makes UNIQUE equivalent to | |
1275 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1276 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1277 | return BVAR (current_buffer, name); |
3bd779aa | 1278 | if (!NILP (unique)) |
4b4deea2 | 1279 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1280 | else |
d5db4077 | 1281 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1282 | } |
1ab256cb | 1283 | |
4b4deea2 | 1284 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1285 | |
1286 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1287 | any windows displaying current_buffer will stay unchanged. */ | |
1288 | update_mode_lines++; | |
1289 | ||
67180c6a | 1290 | XSETBUFFER (buf, current_buffer); |
489c043a | 1291 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1292 | if (NILP (BVAR (current_buffer, filename)) |
1293 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1294 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1295 | |
1296 | /* Run buffer-list-update-hook. */ | |
1297 | if (!NILP (Vrun_hooks)) | |
1298 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1299 | ||
fb5eba9c | 1300 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1301 | return BVAR (current_buffer, name); |
1ab256cb RM |
1302 | } |
1303 | ||
a7ca3326 | 1304 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1305 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1306 | Buffers not visible in windows are preferred to visible buffers, unless |
1307 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1308 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1309 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1310 | frame's buffer list. | |
1311 | ||
1312 | The buffer is found by scanning the selected or specified frame's buffer | |
1313 | list first, followed by the list of all buffers. If no other buffer | |
1314 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1315 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1316 | { |
9397e56f MR |
1317 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1318 | Lisp_Object tail, buf, pred; | |
1319 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1320 | |
773fbdb9 | 1321 | if (NILP (frame)) |
9ba9623d | 1322 | frame = selected_frame; |
773fbdb9 | 1323 | |
d234d13e JL |
1324 | CHECK_FRAME (frame); |
1325 | ||
773fbdb9 | 1326 | pred = frame_buffer_predicate (frame); |
9397e56f MR |
1327 | /* Consider buffers that have been seen in the frame first. */ |
1328 | tail = XFRAME (frame)->buffer_list; | |
1329 | for (; CONSP (tail); tail = XCDR (tail)) | |
7962a441 | 1330 | { |
9397e56f MR |
1331 | buf = XCAR (tail); |
1332 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1333 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1334 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1335 | /* If the frame has a buffer_predicate, disregard buffers that | |
1336 | don't fit the predicate. */ | |
1337 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1338 | { | |
1339 | if (!NILP (visible_ok) | |
1340 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1341 | return buf; | |
1342 | else if (NILP (notsogood)) | |
1343 | notsogood = buf; | |
1344 | } | |
7962a441 | 1345 | } |
7962a441 | 1346 | |
9397e56f MR |
1347 | /* Consider alist of all buffers next. */ |
1348 | tail = Vbuffer_alist; | |
6d70a280 | 1349 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1350 | { |
6d70a280 | 1351 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1352 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1353 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1354 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1355 | /* If the frame has a buffer_predicate, disregard buffers that | |
1356 | don't fit the predicate. */ | |
1357 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1358 | { | |
1359 | if (!NILP (visible_ok) | |
1360 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1361 | return buf; | |
1362 | else if (NILP (notsogood)) | |
1363 | notsogood = buf; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | if (!NILP (notsogood)) | |
1368 | return notsogood; | |
1369 | else | |
1370 | { | |
1371 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1372 | if (NILP (buf)) |
04ae1b48 | 1373 | { |
9397e56f MR |
1374 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1375 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1376 | } |
9397e56f MR |
1377 | return buf; |
1378 | } | |
1379 | } | |
04ae1b48 | 1380 | |
9397e56f MR |
1381 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1382 | pay attention to any frame-local buffer lists, doesn't care about | |
1383 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1384 | ||
1385 | Lisp_Object | |
1386 | other_buffer_safely (Lisp_Object buffer) | |
1387 | { | |
1388 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1389 | Lisp_Object tail, buf; | |
1390 | ||
1391 | tail = Vbuffer_alist; | |
1392 | for (; CONSP (tail); tail = XCDR (tail)) | |
1393 | { | |
1394 | buf = Fcdr (XCAR (tail)); | |
1395 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1396 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1397 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1398 | return buf; |
1ab256cb | 1399 | } |
9397e56f | 1400 | |
dba1a30a GM |
1401 | buf = Fget_buffer (build_string ("*scratch*")); |
1402 | if (NILP (buf)) | |
1403 | { | |
1404 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1405 | Fset_buffer_major_mode (buf); | |
1406 | } | |
9397e56f | 1407 | |
89132f25 | 1408 | return buf; |
1ab256cb RM |
1409 | } |
1410 | \f | |
a7ca3326 | 1411 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1412 | 0, 1, "", |
7ee72033 MB |
1413 | doc: /* Start keeping undo information for buffer BUFFER. |
1414 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1415 | (register Lisp_Object buffer) |
1ab256cb | 1416 | { |
ffd56f97 | 1417 | Lisp_Object real_buffer; |
1ab256cb | 1418 | |
ffd56f97 | 1419 | if (NILP (buffer)) |
67180c6a | 1420 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1421 | else |
1422 | { | |
ffd56f97 JB |
1423 | real_buffer = Fget_buffer (buffer); |
1424 | if (NILP (real_buffer)) | |
1425 | nsberror (buffer); | |
1ab256cb RM |
1426 | } |
1427 | ||
4b4deea2 TT |
1428 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1429 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1430 | |
1431 | return Qnil; | |
1432 | } | |
1433 | ||
1434 | /* | |
00b3c7ac | 1435 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1436 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1437 | The buffer being killed will be current while the hook is running.\n\ | |
b7e8d081 MR |
1438 | |
1439 | Functions run by this hook are supposed to not change the current | |
1440 | buffer. See `kill-buffer'." | |
1441 | */ | |
a7ca3326 | 1442 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1443 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1444 | The argument may be a buffer or the name of an existing buffer. |
1445 | Argument nil or omitted means kill the current buffer. Return t if the | |
1446 | buffer is actually killed, nil otherwise. | |
1447 | ||
b7e8d081 MR |
1448 | The functions in `kill-buffer-query-functions' are called with the |
1449 | buffer to be killed as the current buffer. If any of them returns nil, | |
1450 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1451 | buffer is actually killed. The buffer being killed will be current | |
1452 | while the hook is running. Functions called by any of these hooks are | |
1453 | supposed to not change the current buffer. | |
018ba359 PJ |
1454 | |
1455 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1456 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1457 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1458 | (Lisp_Object buffer_or_name) |
1ab256cb | 1459 | { |
c8804c4f | 1460 | Lisp_Object buffer; |
1ab256cb RM |
1461 | register struct buffer *b; |
1462 | register Lisp_Object tem; | |
1463 | register struct Lisp_Marker *m; | |
6af718a4 | 1464 | struct gcpro gcpro1; |
1ab256cb | 1465 | |
c8804c4f MR |
1466 | if (NILP (buffer_or_name)) |
1467 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1468 | else |
c8804c4f MR |
1469 | buffer = Fget_buffer (buffer_or_name); |
1470 | if (NILP (buffer)) | |
1471 | nsberror (buffer_or_name); | |
1ab256cb | 1472 | |
c8804c4f | 1473 | b = XBUFFER (buffer); |
1ab256cb | 1474 | |
4a4a9db5 | 1475 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1476 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1477 | return Qnil; |
1478 | ||
1ab256cb | 1479 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1480 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1481 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1482 | { |
c8804c4f | 1483 | GCPRO1 (buffer); |
5c4930b0 | 1484 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1485 | BVAR (b, name), make_number (0))); |
1ab256cb | 1486 | UNGCPRO; |
265a9e55 | 1487 | if (NILP (tem)) |
1ab256cb RM |
1488 | return Qnil; |
1489 | } | |
1490 | ||
dcdffbf6 | 1491 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1492 | { |
d311d28c | 1493 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1494 | Lisp_Object arglist[1]; |
1ab256cb RM |
1495 | |
1496 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1497 | set_buffer_internal (b); | |
dcdffbf6 RS |
1498 | |
1499 | /* First run the query functions; if any query is answered no, | |
1500 | don't kill the buffer. */ | |
5b20caf0 | 1501 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1502 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1503 | if (NILP (tem)) | |
5b20caf0 | 1504 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1505 | |
1506 | /* Then run the hooks. */ | |
f1597a3a | 1507 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1508 | unbind_to (count, Qnil); |
1509 | } | |
1510 | ||
b7e8d081 MR |
1511 | /* If the hooks have killed the buffer, exit now. */ |
1512 | if (NILP (BVAR (b, name))) | |
1513 | return Qt; | |
1514 | ||
1ab256cb RM |
1515 | /* We have no more questions to ask. Verify that it is valid |
1516 | to kill the buffer. This must be done after the questions | |
1517 | since anything can happen within do_yes_or_no_p. */ | |
1518 | ||
1519 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1520 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1521 | return Qnil; |
1522 | ||
336cd056 RS |
1523 | /* When we kill a base buffer, kill all its indirect buffers. |
1524 | We do it at this stage so nothing terrible happens if they | |
1525 | ask questions or their hooks get errors. */ | |
1526 | if (! b->base_buffer) | |
1527 | { | |
1528 | struct buffer *other; | |
1529 | ||
c8804c4f | 1530 | GCPRO1 (buffer); |
336cd056 | 1531 | |
eab3844f | 1532 | for (other = all_buffers; other; other = other->header.next.buffer) |
4a4a9db5 KH |
1533 | /* all_buffers contains dead buffers too; |
1534 | don't re-kill them. */ | |
4b4deea2 | 1535 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1536 | { |
8f54f30a PE |
1537 | Lisp_Object buf; |
1538 | XSETBUFFER (buf, other); | |
1539 | Fkill_buffer (buf); | |
336cd056 RS |
1540 | } |
1541 | ||
1542 | UNGCPRO; | |
b7e8d081 MR |
1543 | |
1544 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
1545 | if (NILP (BVAR (b, name))) | |
1546 | return Qt; | |
336cd056 | 1547 | } |
177c0ea7 | 1548 | |
56e2e794 MR |
1549 | /* Run replace_buffer_in_windows before making another buffer current |
1550 | since set-window-buffer-start-and-point will refuse to make another | |
1551 | buffer current if the selected window does not show the current | |
1552 | buffer. (Bug#10114) */ | |
1553 | replace_buffer_in_windows (buffer); | |
1554 | ||
b7e8d081 MR |
1555 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
1556 | if (NILP (BVAR (b, name))) | |
1557 | return Qt; | |
1558 | ||
1559 | /* Make this buffer not be current. Exit if it is the sole visible | |
1560 | buffer. */ | |
1ab256cb RM |
1561 | if (b == current_buffer) |
1562 | { | |
c8804c4f | 1563 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1564 | Fset_buffer (tem); |
1565 | if (b == current_buffer) | |
1566 | return Qnil; | |
1567 | } | |
1568 | ||
b7e8d081 MR |
1569 | /* If the buffer now current is shown in the minibuffer and our buffer |
1570 | is the sole other buffer give up. */ | |
77270fac | 1571 | XSETBUFFER (tem, current_buffer); |
b7e8d081 MR |
1572 | if (EQ (tem, XWINDOW (minibuf_window)->buffer) |
1573 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) | |
1574 | return Qnil; | |
77270fac | 1575 | |
1ab256cb RM |
1576 | /* Now there is no question: we can kill the buffer. */ |
1577 | ||
1578 | #ifdef CLASH_DETECTION | |
1579 | /* Unlock this buffer's file, if it is locked. */ | |
1580 | unlock_buffer (b); | |
1581 | #endif /* CLASH_DETECTION */ | |
1582 | ||
c8804c4f MR |
1583 | GCPRO1 (buffer); |
1584 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1585 | UNGCPRO; |
1586 | ||
b7e8d081 MR |
1587 | /* Killing buffer processes may run sentinels which may have killed |
1588 | our buffer. */ | |
4b4deea2 | 1589 | if (NILP (BVAR (b, name))) |
b7e8d081 | 1590 | return Qt; |
49da74e6 | 1591 | |
9397e56f MR |
1592 | /* These may run Lisp code and into infinite loops (if someone |
1593 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1594 | frames_discard_buffer (buffer); |
1595 | ||
b93fb365 | 1596 | clear_charpos_cache (b); |
1ab256cb RM |
1597 | |
1598 | tem = Vinhibit_quit; | |
1599 | Vinhibit_quit = Qt; | |
9397e56f | 1600 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1601 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1602 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1603 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1604 | Vinhibit_quit = tem; |
1605 | ||
9cf712eb RS |
1606 | /* Delete any auto-save file, if we saved it in this session. |
1607 | But not if the buffer is modified. */ | |
4b4deea2 | 1608 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1609 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1610 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1611 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1612 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1613 | { |
8f54f30a PE |
1614 | Lisp_Object delete; |
1615 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1616 | if (! NILP (delete)) | |
4b4deea2 | 1617 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1618 | } |
1619 | ||
b7e8d081 MR |
1620 | /* Deleting an auto-save file could have killed our buffer. */ |
1621 | if (NILP (BVAR (b, name))) | |
1622 | return Qt; | |
1623 | ||
4a4a9db5 KH |
1624 | if (b->base_buffer) |
1625 | { | |
1626 | /* Unchain all markers that belong to this indirect buffer. | |
1627 | Don't unchain the markers that belong to the base buffer | |
1628 | or its other indirect buffers. */ | |
65745fad | 1629 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1630 | { |
65745fad | 1631 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1632 | if (m->buffer == b) |
65745fad SM |
1633 | unchain_marker (m); |
1634 | m = next; | |
4a4a9db5 KH |
1635 | } |
1636 | } | |
1637 | else | |
1ab256cb | 1638 | { |
4a4a9db5 | 1639 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1640 | and leave them pointing nowhere. */ |
65745fad | 1641 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1642 | { |
65745fad | 1643 | struct Lisp_Marker *next = m->next; |
336cd056 | 1644 | m->buffer = 0; |
65745fad SM |
1645 | m->next = NULL; |
1646 | m = next; | |
336cd056 | 1647 | } |
65745fad | 1648 | BUF_MARKERS (b) = NULL; |
336cd056 | 1649 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1650 | |
1651 | /* Perhaps we should explicitly free the interval tree here... */ | |
1652 | } | |
33f7013e | 1653 | |
2f3f993b RS |
1654 | /* Reset the local variables, so that this buffer's local values |
1655 | won't be protected from GC. They would be protected | |
e4769531 | 1656 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1657 | This gets rid of them for certain. */ |
1658 | swap_out_buffer_local_variables (b); | |
13de9290 | 1659 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1660 | |
4b4deea2 | 1661 | BVAR (b, name) = Qnil; |
336cd056 | 1662 | |
9ac0d9e0 | 1663 | BLOCK_INPUT; |
336cd056 | 1664 | if (! b->base_buffer) |
b86af064 | 1665 | free_buffer_text (b); |
336cd056 | 1666 | |
28e969dd JB |
1667 | if (b->newline_cache) |
1668 | { | |
1669 | free_region_cache (b->newline_cache); | |
1670 | b->newline_cache = 0; | |
1671 | } | |
1672 | if (b->width_run_cache) | |
1673 | { | |
1674 | free_region_cache (b->width_run_cache); | |
1675 | b->width_run_cache = 0; | |
1676 | } | |
4b4deea2 | 1677 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1678 | UNBLOCK_INPUT; |
4b4deea2 | 1679 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1680 | |
9397e56f MR |
1681 | /* Run buffer-list-update-hook. */ |
1682 | if (!NILP (Vrun_hooks)) | |
1683 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1684 | ||
1ab256cb RM |
1685 | return Qt; |
1686 | } | |
1687 | \f | |
9397e56f MR |
1688 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1689 | we do this each time BUFFER is selected visibly, the more recently | |
1690 | selected buffers are always closer to the front of those lists. This | |
1691 | means that other_buffer is more likely to choose a relevant buffer. | |
1692 | ||
1693 | Note that this moves BUFFER to the front of the buffer lists of the | |
1694 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1695 | shown in the selected frame, consider the present behavior a feature. | |
1696 | `select-window' gets this right since it shows BUFFER in the selected | |
1697 | window when calling us. */ | |
1ab256cb | 1698 | |
01136e9b | 1699 | void |
9397e56f | 1700 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1701 | { |
4475bec4 | 1702 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1703 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1704 | |
9397e56f | 1705 | CHECK_BUFFER (buffer); |
1ab256cb | 1706 | |
9397e56f MR |
1707 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1708 | Don't allow quitting since this might leave the buffer list in an | |
1709 | inconsistent state. */ | |
1710 | tem = Vinhibit_quit; | |
1711 | Vinhibit_quit = Qt; | |
1712 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1713 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1714 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1715 | XSETCDR (aelt_cons, Vbuffer_alist); |
1716 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1717 | Vinhibit_quit = tem; |
1ab256cb | 1718 | |
9397e56f MR |
1719 | /* Update buffer list of selected frame. */ |
1720 | f->buffer_list = Fcons (buffer, Fdelq (buffer, f->buffer_list)); | |
1721 | f->buried_buffer_list = Fdelq (buffer, f->buried_buffer_list); | |
177c0ea7 | 1722 | |
9397e56f MR |
1723 | /* Run buffer-list-update-hook. */ |
1724 | if (!NILP (Vrun_hooks)) | |
1725 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1726 | } | |
7962a441 | 1727 | |
7962a441 | 1728 | |
e4ed06f1 CY |
1729 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1730 | buffer is killed. For the selected frame's buffer list this moves | |
1731 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 1732 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 1733 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 1734 | |
e4ed06f1 CY |
1735 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1736 | 1, 1, 0, | |
1737 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1738 | (Lisp_Object buffer) |
1739 | { | |
4475bec4 | 1740 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1741 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1742 | |
9397e56f | 1743 | CHECK_BUFFER (buffer); |
177c0ea7 | 1744 | |
9397e56f MR |
1745 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1746 | Don't allow quitting since this might leave the buffer list in an | |
1747 | inconsistent state. */ | |
1748 | tem = Vinhibit_quit; | |
1749 | Vinhibit_quit = Qt; | |
1750 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1751 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1752 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1753 | XSETCDR (aelt_cons, Qnil); |
1754 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1755 | Vinhibit_quit = tem; |
1756 | ||
1757 | /* Update buffer lists of selected frame. */ | |
1758 | f->buffer_list = Fdelq (buffer, f->buffer_list); | |
1759 | f->buried_buffer_list = Fcons (buffer, Fdelq (buffer, f->buried_buffer_list)); | |
1760 | ||
1761 | /* Run buffer-list-update-hook. */ | |
1762 | if (!NILP (Vrun_hooks)) | |
1763 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1764 | ||
e4ed06f1 | 1765 | return Qnil; |
1ab256cb RM |
1766 | } |
1767 | ||
a9ee7a59 | 1768 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1769 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1770 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1771 | according to `default-major-mode'. |
018ba359 | 1772 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1773 | the current buffer's major mode. */) |
5842a27b | 1774 | (Lisp_Object buffer) |
a9ee7a59 | 1775 | { |
d311d28c | 1776 | ptrdiff_t count; |
a9ee7a59 KH |
1777 | Lisp_Object function; |
1778 | ||
ea4fddd8 JB |
1779 | CHECK_BUFFER (buffer); |
1780 | ||
4b4deea2 TT |
1781 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1782 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1783 | function = find_symbol_value (intern ("initial-major-mode")); |
1784 | else | |
1785 | { | |
4b4deea2 | 1786 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1787 | if (NILP (function) |
4b4deea2 TT |
1788 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1789 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1790 | } |
177c0ea7 | 1791 | |
48265e61 DL |
1792 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1793 | return Qnil; | |
1794 | ||
aed13378 | 1795 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1796 | |
48265e61 DL |
1797 | /* To select a nonfundamental mode, |
1798 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1799 | |
1800 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1801 | ||
a2428fa2 | 1802 | Fset_buffer (buffer); |
48265e61 | 1803 | call0 (function); |
a9ee7a59 KH |
1804 | |
1805 | return unbind_to (count, Qnil); | |
1806 | } | |
1807 | ||
a7ca3326 | 1808 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1809 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1810 | (void) |
1ab256cb RM |
1811 | { |
1812 | register Lisp_Object buf; | |
67180c6a | 1813 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1814 | return buf; |
1815 | } | |
1816 | \f | |
7ec44ec6 GM |
1817 | /* Set the current buffer to B. |
1818 | ||
1819 | We previously set windows_or_buffers_changed here to invalidate | |
1820 | global unchanged information in beg_unchanged and end_unchanged. | |
1821 | This is no longer necessary because we now compute unchanged | |
1822 | information on a buffer-basis. Every action affecting other | |
1823 | windows than the selected one requires a select_window at some | |
1824 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1825 | |
1826 | void | |
d3da34e0 | 1827 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1828 | { |
b5a225b4 | 1829 | if (current_buffer != b) |
7ec44ec6 | 1830 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1831 | } |
1832 | ||
1833 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1834 | This is used by redisplay. */ | |
1835 | ||
1836 | void | |
d3da34e0 | 1837 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1838 | { |
1839 | register struct buffer *old_buf; | |
ce5b453a | 1840 | register Lisp_Object tail; |
c7aa5005 | 1841 | |
b86af064 | 1842 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1843 | if (b->text->beg == NULL) |
b86af064 GM |
1844 | enlarge_buffer_text (b, 0); |
1845 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1846 | |
c7aa5005 KH |
1847 | if (current_buffer == b) |
1848 | return; | |
1849 | ||
1ab256cb RM |
1850 | old_buf = current_buffer; |
1851 | current_buffer = b; | |
1852 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1853 | ||
336cd056 RS |
1854 | if (old_buf) |
1855 | { | |
1856 | /* Put the undo list back in the base buffer, so that it appears | |
1857 | that an indirect buffer shares the undo list of its base. */ | |
1858 | if (old_buf->base_buffer) | |
4b4deea2 | 1859 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1860 | |
1861 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1862 | when it is not current, update them now. */ | |
cffc6f3b | 1863 | record_buffer_markers (old_buf); |
336cd056 RS |
1864 | } |
1865 | ||
1866 | /* Get the undo list from the base buffer, so that it appears | |
1867 | that an indirect buffer shares the undo list of its base. */ | |
1868 | if (b->base_buffer) | |
4b4deea2 | 1869 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1870 | |
1871 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1872 | when it is not current, fetch them now. */ | |
cffc6f3b | 1873 | fetch_buffer_markers (b); |
336cd056 | 1874 | |
1ab256cb RM |
1875 | /* Look down buffer's list of local Lisp variables |
1876 | to find and update any that forward into C variables. */ | |
1877 | ||
ce5b453a | 1878 | do |
1ab256cb | 1879 | { |
4b4deea2 | 1880 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1881 | { |
1882 | Lisp_Object var = XCAR (XCAR (tail)); | |
1883 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1884 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1885 | && SYMBOL_BLV (sym)->fwd) | |
1886 | /* Just reference the variable | |
1887 | to cause it to become set for this buffer. */ | |
1888 | Fsymbol_value (var); | |
1889 | } | |
1ab256cb | 1890 | } |
1ab256cb | 1891 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1892 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1893 | } |
1894 | ||
336cd056 | 1895 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1896 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1897 | |
1898 | void | |
d3da34e0 | 1899 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1900 | { |
1901 | register struct buffer *old_buf; | |
1902 | ||
1903 | if (current_buffer == b) | |
1904 | return; | |
1905 | ||
1906 | old_buf = current_buffer; | |
1907 | current_buffer = b; | |
1908 | ||
cffc6f3b CY |
1909 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1910 | when it is not current, update them now. */ | |
1911 | record_buffer_markers (old_buf); | |
336cd056 RS |
1912 | |
1913 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1914 | when it is not current, fetch them now. */ | |
cffc6f3b | 1915 | fetch_buffer_markers (b); |
336cd056 RS |
1916 | } |
1917 | ||
a7ca3326 | 1918 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1919 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1920 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1921 | also `save-excursion' when you want to make a buffer current | |
1922 | temporarily. This function does not display the buffer, so its effect | |
1923 | ends when the current command terminates. Use `switch-to-buffer' or | |
1924 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1925 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1926 | { |
c8804c4f MR |
1927 | register Lisp_Object buffer; |
1928 | buffer = Fget_buffer (buffer_or_name); | |
1929 | if (NILP (buffer)) | |
1930 | nsberror (buffer_or_name); | |
4b4deea2 | 1931 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1932 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1933 | set_buffer_internal (XBUFFER (buffer)); |
1934 | return buffer; | |
1ab256cb | 1935 | } |
d0628b06 RS |
1936 | |
1937 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1938 | ||
1939 | Lisp_Object | |
d3da34e0 | 1940 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1941 | { |
4b4deea2 | 1942 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1943 | Fset_buffer (buffer); |
1944 | return Qnil; | |
1945 | } | |
1ab256cb | 1946 | \f |
a7ca3326 | 1947 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1948 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1949 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1950 | (void) |
1ab256cb | 1951 | { |
4b4deea2 | 1952 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1953 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1954 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1955 | return Qnil; |
1956 | } | |
1ab256cb | 1957 | \f |
a7ca3326 | 1958 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1959 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1960 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 1961 | so the buffer is truly empty after this. */) |
5842a27b | 1962 | (void) |
1ab256cb RM |
1963 | { |
1964 | Fwiden (); | |
c0d9a0c3 GM |
1965 | |
1966 | del_range (BEG, Z); | |
c280bc6a | 1967 | |
1ab256cb RM |
1968 | current_buffer->last_window_start = 1; |
1969 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1970 | if future size is less than past size. Use of erase-buffer | |
1971 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 1972 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
1973 | return Qnil; |
1974 | } | |
1975 | ||
01136e9b | 1976 | void |
d3da34e0 | 1977 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 1978 | { |
b7826503 PJ |
1979 | CHECK_NUMBER_COERCE_MARKER (*b); |
1980 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1981 | |
1982 | if (XINT (*b) > XINT (*e)) | |
1983 | { | |
03192067 KH |
1984 | Lisp_Object tem; |
1985 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1986 | } |
1987 | ||
d311d28c | 1988 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
1989 | args_out_of_range (*b, *e); |
1990 | } | |
1991 | \f | |
b05525fa RS |
1992 | /* Advance BYTE_POS up to a character boundary |
1993 | and return the adjusted position. */ | |
1994 | ||
d311d28c PE |
1995 | static ptrdiff_t |
1996 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 1997 | { |
f8449323 | 1998 | int c; |
b05525fa | 1999 | |
f8449323 RS |
2000 | if (byte_pos == BEG) |
2001 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2002 | return BEG; |
f8449323 RS |
2003 | |
2004 | c = FETCH_BYTE (byte_pos); | |
2005 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2006 | { |
1be6387d | 2007 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2008 | multibyte sequence. */ |
d311d28c | 2009 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2010 | |
2011 | do | |
2012 | { | |
2013 | byte_pos--; | |
2014 | c = FETCH_BYTE (byte_pos); | |
2015 | } | |
2016 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2017 | INC_POS (byte_pos); |
a9bcded1 KH |
2018 | if (byte_pos < orig_byte_pos) |
2019 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2020 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2021 | surely advance to the correct character boundary. If C is | |
2022 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2023 | } |
2024 | ||
20773569 | 2025 | return byte_pos; |
b05525fa RS |
2026 | } |
2027 | ||
13cda5f9 SM |
2028 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2029 | 1, 1, 0, | |
2030 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2031 | (Lisp_Object buffer) |
13cda5f9 SM |
2032 | { |
2033 | struct buffer *other_buffer; | |
2034 | CHECK_BUFFER (buffer); | |
2035 | other_buffer = XBUFFER (buffer); | |
2036 | ||
4b4deea2 | 2037 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2038 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2039 | |
13cda5f9 SM |
2040 | /* Actually, it probably works just fine. |
2041 | * if (other_buffer == current_buffer) | |
2042 | * error ("Cannot swap a buffer's text with itself"); */ | |
2043 | ||
2044 | /* Actually, this may be workable as well, tho probably only if they're | |
2045 | *both* indirect. */ | |
2046 | if (other_buffer->base_buffer | |
2047 | || current_buffer->base_buffer) | |
2048 | error ("Cannot swap indirect buffers's text"); | |
2049 | ||
2050 | { /* This is probably harder to make work. */ | |
2051 | struct buffer *other; | |
eab3844f | 2052 | for (other = all_buffers; other; other = other->header.next.buffer) |
13cda5f9 SM |
2053 | if (other->base_buffer == other_buffer |
2054 | || other->base_buffer == current_buffer) | |
2055 | error ("One of the buffers to swap has indirect buffers"); | |
2056 | } | |
2057 | ||
2058 | #define swapfield(field, type) \ | |
2059 | do { \ | |
2060 | type tmp##field = other_buffer->field; \ | |
2061 | other_buffer->field = current_buffer->field; \ | |
2062 | current_buffer->field = tmp##field; \ | |
2063 | } while (0) | |
5d8ea120 TT |
2064 | #define swapfield_(field, type) \ |
2065 | do { \ | |
4b4deea2 TT |
2066 | type tmp##field = BVAR (other_buffer, field); \ |
2067 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2068 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2069 | } while (0) |
13cda5f9 SM |
2070 | |
2071 | swapfield (own_text, struct buffer_text); | |
2072 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2073 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2074 | #ifdef REL_ALLOC |
261cb4bb PE |
2075 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2076 | (void **) &other_buffer->own_text.beg); | |
2077 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2078 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2079 | #endif /* REL_ALLOC */ |
2080 | ||
d311d28c PE |
2081 | swapfield (pt, ptrdiff_t); |
2082 | swapfield (pt_byte, ptrdiff_t); | |
2083 | swapfield (begv, ptrdiff_t); | |
2084 | swapfield (begv_byte, ptrdiff_t); | |
2085 | swapfield (zv, ptrdiff_t); | |
2086 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2087 | eassert (!current_buffer->base_buffer); |
2088 | eassert (!other_buffer->base_buffer); | |
2089 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2090 | swapfield (newline_cache, struct region_cache *); | |
2091 | swapfield (width_run_cache, struct region_cache *); | |
2092 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2093 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2094 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2095 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2096 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2097 | swapfield_ (undo_list, Lisp_Object); |
2098 | swapfield_ (mark, Lisp_Object); | |
2099 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2100 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2101 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2102 | /* FIXME: Not sure what we should do with these *_marker fields. |
2103 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2104 | swapfield_ (pt_marker, Lisp_Object); |
2105 | swapfield_ (begv_marker, Lisp_Object); | |
2106 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2107 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2108 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2109 | |
2110 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2111 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2112 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2113 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2114 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2115 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2116 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2117 | { |
2118 | struct Lisp_Marker *m; | |
2119 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2120 | if (m->buffer == other_buffer) | |
2121 | m->buffer = current_buffer; | |
b8ff72fa SM |
2122 | else |
2123 | /* Since there's no indirect buffer in sight, markers on | |
2124 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2125 | eassert (!m->buffer); | |
13cda5f9 SM |
2126 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2127 | if (m->buffer == current_buffer) | |
2128 | m->buffer = other_buffer; | |
b8ff72fa SM |
2129 | else |
2130 | /* Since there's no indirect buffer in sight, markers on | |
2131 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2132 | eassert (!m->buffer); | |
13cda5f9 | 2133 | } |
126f1fc1 SM |
2134 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2135 | So since we just swapped the markers between the two buffers, we need | |
2136 | to undo the effect of this swap for window markers. */ | |
2137 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2138 | Lisp_Object buf1, buf2; | |
2139 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2140 | ||
2141 | while (NILP (Fmemq (w, ws))) | |
2142 | { | |
2143 | ws = Fcons (w, ws); | |
2144 | if (MARKERP (XWINDOW (w)->pointm) | |
2145 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2146 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2147 | Fset_marker (XWINDOW (w)->pointm, | |
2148 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2149 | XWINDOW (w)->buffer); | |
2150 | w = Fnext_window (w, Qt, Qt); | |
2151 | } | |
2152 | } | |
2153 | ||
13cda5f9 SM |
2154 | if (current_buffer->text->intervals) |
2155 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2156 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2157 | if (other_buffer->text->intervals) | |
2158 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2159 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2160 | ||
2161 | return Qnil; | |
2162 | } | |
2163 | ||
a7ca3326 | 2164 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2165 | 1, 1, 0, |
7ee72033 | 2166 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2167 | If FLAG is t, this makes the buffer a multibyte buffer. |
2168 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2169 | In these cases, the buffer contents remain unchanged as a sequence of |
2170 | bytes but the contents viewed as characters do change. | |
2171 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2172 | all eight-bit bytes to eight-bit characters. |
2173 | If the multibyte flag was really changed, undo information of the | |
2174 | current buffer is cleared. */) | |
5842a27b | 2175 | (Lisp_Object flag) |
3ac81adb | 2176 | { |
65745fad | 2177 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2178 | struct buffer *other; |
d311d28c | 2179 | ptrdiff_t begv, zv; |
8d1203ea | 2180 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2181 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2182 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2183 | struct gcpro gcpro1; |
3ac81adb | 2184 | |
6e553d5e RS |
2185 | if (current_buffer->base_buffer) |
2186 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2187 | ||
70e77119 | 2188 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2189 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2190 | return flag; |
2191 | ||
38babc07 KS |
2192 | GCPRO1 (old_undo); |
2193 | ||
2194 | /* Don't record these buffer changes. We will put a special undo entry | |
2195 | instead. */ | |
4b4deea2 | 2196 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2197 | |
3ac81adb RS |
2198 | /* If the cached position is for this buffer, clear it out. */ |
2199 | clear_charpos_cache (current_buffer); | |
2200 | ||
458c8af4 KH |
2201 | if (NILP (flag)) |
2202 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2203 | else | |
2204 | begv = BEGV, zv = ZV; | |
2205 | ||
a9bcded1 KH |
2206 | if (narrowed) |
2207 | Fwiden (); | |
2208 | ||
3ac81adb RS |
2209 | if (NILP (flag)) |
2210 | { | |
d311d28c | 2211 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2212 | unsigned char *p; |
2213 | ||
3ac81adb RS |
2214 | /* Do this first, so it can use CHAR_TO_BYTE |
2215 | to calculate the old correspondences. */ | |
2216 | set_intervals_multibyte (0); | |
2217 | ||
4b4deea2 | 2218 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2219 | |
2220 | Z = Z_BYTE; | |
2221 | BEGV = BEGV_BYTE; | |
2222 | ZV = ZV_BYTE; | |
2223 | GPT = GPT_BYTE; | |
2224 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2225 | ||
60ebfdf3 | 2226 | |
65745fad SM |
2227 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2228 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2229 | |
2230 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2231 | pos = BEG; | |
2232 | stop = GPT; | |
2233 | p = BEG_ADDR; | |
2234 | while (1) | |
2235 | { | |
2236 | int c, bytes; | |
2237 | ||
2238 | if (pos == stop) | |
2239 | { | |
2240 | if (pos == Z) | |
2241 | break; | |
2242 | p = GAP_END_ADDR; | |
2243 | stop = Z; | |
2244 | } | |
8f348ed5 KH |
2245 | if (ASCII_BYTE_P (*p)) |
2246 | p++, pos++; | |
2247 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2248 | { |
62a6e103 | 2249 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2250 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2251 | last one, and change the last one to the character |
a9bcded1 KH |
2252 | code. */ |
2253 | bytes--; | |
2254 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2255 | p = GAP_END_ADDR; | |
2256 | *p++ = c; | |
2257 | pos++; | |
2258 | if (begv > pos) | |
2259 | begv -= bytes; | |
2260 | if (zv > pos) | |
2261 | zv -= bytes; | |
2262 | stop = Z; | |
2263 | } | |
8f924df7 | 2264 | else |
8f348ed5 KH |
2265 | { |
2266 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2267 | p += bytes, pos += bytes; | |
2268 | } | |
a9bcded1 KH |
2269 | } |
2270 | if (narrowed) | |
2271 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2272 | } |
2273 | else | |
2274 | { | |
d311d28c PE |
2275 | ptrdiff_t pt = PT; |
2276 | ptrdiff_t pos, stop; | |
8f348ed5 | 2277 | unsigned char *p, *pend; |
a9bcded1 | 2278 | |
673c57d2 | 2279 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2280 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2281 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2282 | |
8f924df7 | 2283 | if (EQ (flag, Qt) |
a3a303df | 2284 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2285 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2286 | { | |
8f54f30a | 2287 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2288 | |
8f54f30a PE |
2289 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2290 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2291 | { |
d311d28c | 2292 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2293 | |
2294 | move_gap_both (new_gpt, new_gpt); | |
2295 | } | |
2296 | } | |
2297 | ||
a9bcded1 KH |
2298 | /* Make the buffer contents valid as multibyte by converting |
2299 | 8-bit characters to multibyte form. */ | |
2300 | pos = BEG; | |
2301 | stop = GPT; | |
2302 | p = BEG_ADDR; | |
8f348ed5 | 2303 | pend = GPT_ADDR; |
a9bcded1 KH |
2304 | while (1) |
2305 | { | |
2306 | int bytes; | |
2307 | ||
2308 | if (pos == stop) | |
2309 | { | |
2310 | if (pos == Z) | |
2311 | break; | |
2312 | p = GAP_END_ADDR; | |
8f348ed5 | 2313 | pend = Z_ADDR; |
a9bcded1 KH |
2314 | stop = Z; |
2315 | } | |
177c0ea7 | 2316 | |
a3a303df KH |
2317 | if (ASCII_BYTE_P (*p)) |
2318 | p++, pos++; | |
dcfb9bc4 KH |
2319 | else if (EQ (flag, Qt) |
2320 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2321 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2322 | p += bytes, pos += bytes; |
2323 | else | |
2324 | { | |
2325 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2326 | int c; |
a9bcded1 | 2327 | |
8f924df7 | 2328 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2329 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2330 | *p = tmp[0]; |
2331 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2332 | bytes--; | |
b68864e5 | 2333 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2334 | /* Now the gap is after the just inserted data. */ |
2335 | pos = GPT; | |
2336 | p = GAP_END_ADDR; | |
2337 | if (pos <= begv) | |
2338 | begv += bytes; | |
2339 | if (pos <= zv) | |
2340 | zv += bytes; | |
2341 | if (pos <= pt) | |
2342 | pt += bytes; | |
31285a8f | 2343 | pend = Z_ADDR; |
a9bcded1 KH |
2344 | stop = Z; |
2345 | } | |
2346 | } | |
2347 | ||
2348 | if (pt != PT) | |
2349 | TEMP_SET_PT (pt); | |
2350 | ||
2351 | if (narrowed) | |
2352 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2353 | ||
3ac81adb RS |
2354 | /* Do this first, so that chars_in_text asks the right question. |
2355 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2356 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2357 | |
b05525fa | 2358 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2359 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2360 | |
673c57d2 | 2361 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2362 | |
2363 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2364 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2365 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2366 | else |
2367 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2368 | |
2369 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2370 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2371 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2372 | else |
2373 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2374 | |
2375 | { | |
d311d28c PE |
2376 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2377 | ptrdiff_t position; | |
b05525fa | 2378 | |
8f54f30a PE |
2379 | if (byte > GPT_BYTE) |
2380 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2381 | else |
8f54f30a PE |
2382 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2383 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2384 | } |
3ac81adb RS |
2385 | |
2386 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2387 | |
2388 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2389 | getting confused by the markers that have not yet been updated. | |
2390 | It is also a signal that it should never create a marker. */ | |
65745fad | 2391 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2392 | |
65745fad | 2393 | for (; tail; tail = tail->next) |
3ac81adb | 2394 | { |
65745fad SM |
2395 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2396 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2397 | } |
b69f9797 RS |
2398 | |
2399 | /* Make sure no markers were put on the chain | |
2400 | while the chain value was incorrect. */ | |
65745fad | 2401 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2402 | abort (); |
2403 | ||
3ac81adb RS |
2404 | BUF_MARKERS (current_buffer) = markers; |
2405 | ||
2406 | /* Do this last, so it can calculate the new correspondences | |
2407 | between chars and bytes. */ | |
2408 | set_intervals_multibyte (1); | |
2409 | } | |
2410 | ||
38babc07 KS |
2411 | if (!EQ (old_undo, Qt)) |
2412 | { | |
2413 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2414 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2415 | intern ("set-buffer-multibyte"), |
2416 | NILP (flag) ? Qt : Qnil), | |
2417 | old_undo); | |
38babc07 KS |
2418 | } |
2419 | ||
2420 | UNGCPRO; | |
a9bcded1 | 2421 | |
724b203f GM |
2422 | /* Changing the multibyteness of a buffer means that all windows |
2423 | showing that buffer must be updated thoroughly. */ | |
2424 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2425 | ++windows_or_buffers_changed; | |
2426 | ||
abc9d959 RS |
2427 | /* Copy this buffer's new multibyte status |
2428 | into all of its indirect buffers. */ | |
eab3844f | 2429 | for (other = all_buffers; other; other = other->header.next.buffer) |
4b4deea2 | 2430 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2431 | { |
4b4deea2 TT |
2432 | BVAR (other, enable_multibyte_characters) |
2433 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2434 | other->prevent_redisplay_optimizations_p = 1; |
2435 | } | |
abc9d959 | 2436 | |
ed00559d KH |
2437 | /* Restore the modifiedness of the buffer. */ |
2438 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2439 | Fset_buffer_modified_p (Qnil); | |
2440 | ||
172f9454 KH |
2441 | /* Update coding systems of this buffer's process (if any). */ |
2442 | { | |
2443 | Lisp_Object process; | |
2444 | ||
2445 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2446 | if (PROCESSP (process)) | |
2447 | setup_process_coding_systems (process); | |
2448 | } | |
2449 | ||
3ac81adb RS |
2450 | return flag; |
2451 | } | |
2452 | \f | |
a7ca3326 | 2453 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2454 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2455 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2456 | Most local variable bindings are eliminated so that the default values |
2457 | become effective once more. Also, the syntax table is set from | |
2458 | `standard-syntax-table', the local keymap is set to nil, | |
2459 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2460 | This function also forces redisplay of the mode line. | |
2461 | ||
2462 | Every function to select a new major mode starts by | |
2463 | calling this function. | |
2464 | ||
2465 | As a special exception, local variables whose names have | |
2466 | a non-nil `permanent-local' property are not eliminated by this function. | |
2467 | ||
2468 | The first thing this function does is run | |
7ee72033 | 2469 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2470 | (void) |
1ab256cb | 2471 | { |
dee091a3 | 2472 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2473 | |
3709505e | 2474 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2475 | remain swapped in, in their symbols. */ |
1ab256cb | 2476 | |
2f3f993b | 2477 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2478 | |
2479 | /* Actually eliminate all local bindings of this buffer. */ | |
2480 | ||
13de9290 | 2481 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2482 | |
1ab256cb RM |
2483 | /* Force mode-line redisplay. Useful here because all major mode |
2484 | commands call this function. */ | |
2485 | update_mode_lines++; | |
2486 | ||
2487 | return Qnil; | |
2488 | } | |
2f3f993b RS |
2489 | |
2490 | /* Make sure no local variables remain set up with buffer B | |
2491 | for their current values. */ | |
2492 | ||
2493 | static void | |
d3da34e0 | 2494 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2495 | { |
ce5b453a | 2496 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2497 | |
2498 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2499 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2500 | |
67ee9f6e | 2501 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2502 | { |
ce5b453a SM |
2503 | Lisp_Object sym = XCAR (XCAR (alist)); |
2504 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2505 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2506 | now cached. */ |
ce5b453a | 2507 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2508 | { |
e7c10f83 SM |
2509 | /* Symbol is set up for this buffer's old local value: |
2510 | swap it out! */ | |
ce5b453a | 2511 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2512 | } |
2513 | } | |
2514 | } | |
1ab256cb | 2515 | \f |
2eec3b4e | 2516 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2517 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2518 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2519 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2520 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2521 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2522 | or where an overlay starts which ends at or after POS; |
624d2678 | 2523 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2524 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2525 | |
2526 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2527 | when this function is called. |
2528 | ||
2529 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2530 | If EXTEND is zero, we never extend the vector, | |
2531 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2532 | But we still return the total number of overlays. |
2533 | ||
2534 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2535 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2536 | default (BEGV or ZV). */ | |
2eec3b4e | 2537 | |
b081724f PE |
2538 | ptrdiff_t |
2539 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2540 | ptrdiff_t *len_ptr, | |
d311d28c | 2541 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, int change_req) |
1ab256cb | 2542 | { |
2410d73a SM |
2543 | Lisp_Object overlay, start, end; |
2544 | struct Lisp_Overlay *tail; | |
b081724f PE |
2545 | ptrdiff_t idx = 0; |
2546 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2547 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2548 | ptrdiff_t next = ZV; |
2549 | ptrdiff_t prev = BEGV; | |
61d54cd5 RS |
2550 | int inhibit_storing = 0; |
2551 | ||
2410d73a | 2552 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2553 | { |
d311d28c | 2554 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2555 | |
2410d73a | 2556 | XSETMISC (overlay, tail); |
1ab256cb | 2557 | |
2eec3b4e RS |
2558 | start = OVERLAY_START (overlay); |
2559 | end = OVERLAY_END (overlay); | |
239c932b RS |
2560 | endpos = OVERLAY_POSITION (end); |
2561 | if (endpos < pos) | |
2562 | { | |
2563 | if (prev < endpos) | |
2564 | prev = endpos; | |
2565 | break; | |
2566 | } | |
413e06a4 RS |
2567 | startpos = OVERLAY_POSITION (start); |
2568 | /* This one ends at or after POS | |
daa1c109 | 2569 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2570 | if (prev < startpos && startpos < pos) |
2571 | prev = startpos; | |
239c932b RS |
2572 | if (endpos == pos) |
2573 | continue; | |
2eec3b4e RS |
2574 | if (startpos <= pos) |
2575 | { | |
2576 | if (idx == len) | |
2577 | { | |
61d54cd5 RS |
2578 | /* The supplied vector is full. |
2579 | Either make it bigger, or don't store any more in it. */ | |
2580 | if (extend) | |
2581 | { | |
0065d054 PE |
2582 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2583 | sizeof *vec); | |
61d54cd5 | 2584 | *vec_ptr = vec; |
0065d054 | 2585 | len = *len_ptr; |
61d54cd5 RS |
2586 | } |
2587 | else | |
2588 | inhibit_storing = 1; | |
2eec3b4e | 2589 | } |
61d54cd5 RS |
2590 | |
2591 | if (!inhibit_storing) | |
2592 | vec[idx] = overlay; | |
2593 | /* Keep counting overlays even if we can't return them all. */ | |
2594 | idx++; | |
2eec3b4e RS |
2595 | } |
2596 | else if (startpos < next) | |
2597 | next = startpos; | |
2598 | } | |
2599 | ||
2410d73a | 2600 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2601 | { |
d311d28c | 2602 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2603 | |
2410d73a | 2604 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2605 | |
2606 | start = OVERLAY_START (overlay); | |
2607 | end = OVERLAY_END (overlay); | |
2608 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2609 | if (pos < startpos) |
2eec3b4e RS |
2610 | { |
2611 | if (startpos < next) | |
2612 | next = startpos; | |
2613 | break; | |
2614 | } | |
239c932b RS |
2615 | endpos = OVERLAY_POSITION (end); |
2616 | if (pos < endpos) | |
2eec3b4e RS |
2617 | { |
2618 | if (idx == len) | |
2619 | { | |
61d54cd5 RS |
2620 | if (extend) |
2621 | { | |
0065d054 PE |
2622 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2623 | sizeof *vec); | |
61d54cd5 | 2624 | *vec_ptr = vec; |
0065d054 | 2625 | len = *len_ptr; |
61d54cd5 RS |
2626 | } |
2627 | else | |
2628 | inhibit_storing = 1; | |
2eec3b4e | 2629 | } |
61d54cd5 RS |
2630 | |
2631 | if (!inhibit_storing) | |
2632 | vec[idx] = overlay; | |
2633 | idx++; | |
413e06a4 RS |
2634 | |
2635 | if (startpos < pos && startpos > prev) | |
2636 | prev = startpos; | |
2eec3b4e | 2637 | } |
239c932b RS |
2638 | else if (endpos < pos && endpos > prev) |
2639 | prev = endpos; | |
1d5f4c1d MB |
2640 | else if (endpos == pos && startpos > prev |
2641 | && (!change_req || startpos < pos)) | |
413e06a4 | 2642 | prev = startpos; |
1ab256cb RM |
2643 | } |
2644 | ||
239c932b RS |
2645 | if (next_ptr) |
2646 | *next_ptr = next; | |
2647 | if (prev_ptr) | |
2648 | *prev_ptr = prev; | |
2eec3b4e RS |
2649 | return idx; |
2650 | } | |
74514898 | 2651 | \f |
7723e095 MR |
2652 | /* Find all the overlays in the current buffer that overlap the range |
2653 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2654 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2655 | |
177c0ea7 | 2656 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2657 | Store in *LEN_PTR the size allocated for the vector. |
2658 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2659 | or ZV if there are no more overlays. | |
2660 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2661 | or BEGV if there are no previous overlays. | |
2662 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2663 | ||
2664 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2665 | when this function is called. | |
2666 | ||
2667 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2668 | If EXTEND is zero, we never extend the vector, | |
2669 | and we store only as many overlays as will fit. | |
2670 | But we still return the total number of overlays. */ | |
2671 | ||
21514da7 | 2672 | static ptrdiff_t |
145582a0 | 2673 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2674 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2675 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2676 | { |
2410d73a SM |
2677 | Lisp_Object overlay, ostart, oend; |
2678 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2679 | ptrdiff_t idx = 0; |
2680 | ptrdiff_t len = *len_ptr; | |
74514898 | 2681 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2682 | ptrdiff_t next = ZV; |
2683 | ptrdiff_t prev = BEGV; | |
74514898 | 2684 | int inhibit_storing = 0; |
7723e095 | 2685 | int end_is_Z = end == Z; |
74514898 | 2686 | |
2410d73a | 2687 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2688 | { |
d311d28c | 2689 | ptrdiff_t startpos, endpos; |
74514898 | 2690 | |
2410d73a | 2691 | XSETMISC (overlay, tail); |
74514898 RS |
2692 | |
2693 | ostart = OVERLAY_START (overlay); | |
2694 | oend = OVERLAY_END (overlay); | |
2695 | endpos = OVERLAY_POSITION (oend); | |
2696 | if (endpos < beg) | |
2697 | { | |
2698 | if (prev < endpos) | |
2699 | prev = endpos; | |
2700 | break; | |
2701 | } | |
2702 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2703 | /* Count an interval if it overlaps the range, is empty at the |
2704 | start of the range, or is empty at END provided END denotes the | |
2705 | end of the buffer. */ | |
74514898 | 2706 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2707 | || (startpos == endpos |
2708 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2709 | { |
2710 | if (idx == len) | |
2711 | { | |
2712 | /* The supplied vector is full. | |
2713 | Either make it bigger, or don't store any more in it. */ | |
2714 | if (extend) | |
2715 | { | |
0065d054 PE |
2716 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2717 | sizeof *vec); | |
74514898 | 2718 | *vec_ptr = vec; |
0065d054 | 2719 | len = *len_ptr; |
74514898 RS |
2720 | } |
2721 | else | |
2722 | inhibit_storing = 1; | |
2723 | } | |
2724 | ||
2725 | if (!inhibit_storing) | |
2726 | vec[idx] = overlay; | |
2727 | /* Keep counting overlays even if we can't return them all. */ | |
2728 | idx++; | |
2729 | } | |
2730 | else if (startpos < next) | |
2731 | next = startpos; | |
2732 | } | |
2733 | ||
2410d73a | 2734 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2735 | { |
d311d28c | 2736 | ptrdiff_t startpos, endpos; |
74514898 | 2737 | |
2410d73a | 2738 | XSETMISC (overlay, tail); |
74514898 RS |
2739 | |
2740 | ostart = OVERLAY_START (overlay); | |
2741 | oend = OVERLAY_END (overlay); | |
2742 | startpos = OVERLAY_POSITION (ostart); | |
2743 | if (end < startpos) | |
2744 | { | |
2745 | if (startpos < next) | |
2746 | next = startpos; | |
2747 | break; | |
2748 | } | |
2749 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2750 | /* Count an interval if it overlaps the range, is empty at the |
2751 | start of the range, or is empty at END provided END denotes the | |
2752 | end of the buffer. */ | |
74514898 | 2753 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2754 | || (startpos == endpos |
2755 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2756 | { |
2757 | if (idx == len) | |
2758 | { | |
2759 | if (extend) | |
2760 | { | |
0065d054 PE |
2761 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2762 | sizeof *vec); | |
74514898 | 2763 | *vec_ptr = vec; |
0065d054 | 2764 | len = *len_ptr; |
74514898 RS |
2765 | } |
2766 | else | |
2767 | inhibit_storing = 1; | |
2768 | } | |
2769 | ||
2770 | if (!inhibit_storing) | |
2771 | vec[idx] = overlay; | |
2772 | idx++; | |
2773 | } | |
2774 | else if (endpos < beg && endpos > prev) | |
2775 | prev = endpos; | |
2776 | } | |
fc04fa47 | 2777 | |
74514898 RS |
2778 | if (next_ptr) |
2779 | *next_ptr = next; | |
2780 | if (prev_ptr) | |
2781 | *prev_ptr = prev; | |
2782 | return idx; | |
2783 | } | |
09a22085 GM |
2784 | |
2785 | ||
2786 | /* Return non-zero if there exists an overlay with a non-nil | |
2787 | `mouse-face' property overlapping OVERLAY. */ | |
2788 | ||
2789 | int | |
d3da34e0 | 2790 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2791 | { |
d311d28c PE |
2792 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2793 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2794 | ptrdiff_t n, i, size; |
09a22085 | 2795 | Lisp_Object *v, tem; |
177c0ea7 | 2796 | |
bfd8410f | 2797 | size = 10; |
38182d90 | 2798 | v = alloca (size * sizeof *v); |
bfd8410f GM |
2799 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
2800 | if (n > size) | |
09a22085 | 2801 | { |
38182d90 | 2802 | v = alloca (n * sizeof *v); |
09a22085 GM |
2803 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
2804 | } | |
2805 | ||
2806 | for (i = 0; i < n; ++i) | |
2807 | if (!EQ (v[i], overlay) | |
2808 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2809 | !NILP (tem))) | |
2810 | break; | |
2811 | ||
2812 | return i < n; | |
2813 | } | |
2814 | ||
2815 | ||
74514898 | 2816 | \f |
fc04fa47 KH |
2817 | /* Fast function to just test if we're at an overlay boundary. */ |
2818 | int | |
d311d28c | 2819 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 2820 | { |
2410d73a SM |
2821 | Lisp_Object overlay; |
2822 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2823 | |
2410d73a | 2824 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2825 | { |
d311d28c | 2826 | ptrdiff_t endpos; |
fc04fa47 | 2827 | |
2410d73a | 2828 | XSETMISC (overlay ,tail); |
8e50cc2d | 2829 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2830 | abort (); |
2831 | ||
2832 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2833 | if (endpos < pos) | |
2834 | break; | |
2835 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2836 | return 1; | |
2837 | } | |
2838 | ||
2410d73a | 2839 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2840 | { |
d311d28c | 2841 | ptrdiff_t startpos; |
fc04fa47 | 2842 | |
2410d73a | 2843 | XSETMISC (overlay, tail); |
8e50cc2d | 2844 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2845 | abort (); |
2846 | ||
2847 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2848 | if (pos < startpos) | |
2849 | break; | |
2850 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2851 | return 1; | |
2852 | } | |
2853 | return 0; | |
2854 | } | |
2eec3b4e | 2855 | \f |
5985d248 KH |
2856 | struct sortvec |
2857 | { | |
2858 | Lisp_Object overlay; | |
d311d28c | 2859 | ptrdiff_t beg, end; |
fadf4e30 | 2860 | EMACS_INT priority; |
5985d248 KH |
2861 | }; |
2862 | ||
2863 | static int | |
d3da34e0 | 2864 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2865 | { |
dfcf069d AS |
2866 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2867 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2868 | if (s1->priority != s2->priority) |
c20998a7 | 2869 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2870 | if (s1->beg != s2->beg) |
c20998a7 | 2871 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2872 | if (s1->end != s2->end) |
c20998a7 | 2873 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
2874 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
2875 | between "equal" overlays. The result can still change between | |
2876 | invocations of Emacs, but it won't change in the middle of | |
2877 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
2878 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
2879 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
2880 | return 0; |
2881 | } | |
2882 | ||
2883 | /* Sort an array of overlays by priority. The array is modified in place. | |
2884 | The return value is the new size; this may be smaller than the original | |
2885 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2886 | ptrdiff_t |
2887 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2888 | { |
b081724f | 2889 | ptrdiff_t i, j; |
38182d90 | 2890 | struct sortvec *sortvec = alloca (noverlays * sizeof *sortvec); |
5985d248 KH |
2891 | |
2892 | /* Put the valid and relevant overlays into sortvec. */ | |
2893 | ||
2894 | for (i = 0, j = 0; i < noverlays; i++) | |
2895 | { | |
0fa767e7 | 2896 | Lisp_Object tem; |
c99fc30f | 2897 | Lisp_Object overlay; |
5985d248 | 2898 | |
c99fc30f | 2899 | overlay = overlay_vec[i]; |
5985d248 KH |
2900 | if (OVERLAY_VALID (overlay) |
2901 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2902 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2903 | { | |
0fa767e7 KH |
2904 | /* If we're interested in a specific window, then ignore |
2905 | overlays that are limited to some other window. */ | |
2906 | if (w) | |
5985d248 | 2907 | { |
28545e04 | 2908 | Lisp_Object window; |
0fa767e7 KH |
2909 | |
2910 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2911 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2912 | continue; |
5985d248 | 2913 | } |
0fa767e7 KH |
2914 | |
2915 | /* This overlay is good and counts: put it into sortvec. */ | |
2916 | sortvec[j].overlay = overlay; | |
2917 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2918 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2919 | tem = Foverlay_get (overlay, Qpriority); | |
2920 | if (INTEGERP (tem)) | |
2921 | sortvec[j].priority = XINT (tem); | |
2922 | else | |
2923 | sortvec[j].priority = 0; | |
2924 | j++; | |
5985d248 KH |
2925 | } |
2926 | } | |
2927 | noverlays = j; | |
2928 | ||
2929 | /* Sort the overlays into the proper order: increasing priority. */ | |
2930 | ||
2931 | if (noverlays > 1) | |
2932 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2933 | ||
2934 | for (i = 0; i < noverlays; i++) | |
2935 | overlay_vec[i] = sortvec[i].overlay; | |
2936 | return (noverlays); | |
2937 | } | |
2938 | \f | |
bbbe9545 KH |
2939 | struct sortstr |
2940 | { | |
cb26008f | 2941 | Lisp_Object string, string2; |
93cb6be3 | 2942 | ptrdiff_t size; |
8961a454 | 2943 | EMACS_INT priority; |
bbbe9545 KH |
2944 | }; |
2945 | ||
e8185fa8 KH |
2946 | struct sortstrlist |
2947 | { | |
2948 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
2949 | ptrdiff_t size; /* Allocated length of that array. */ |
2950 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 2951 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
2952 | }; |
2953 | ||
2954 | /* Buffers for storing information about the overlays touching a given | |
2955 | position. These could be automatic variables in overlay_strings, but | |
2956 | it's more efficient to hold onto the memory instead of repeatedly | |
2957 | allocating and freeing it. */ | |
2958 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2959 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2960 | |
2961 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 2962 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 2963 | |
bbbe9545 KH |
2964 | /* A comparison function suitable for passing to qsort. */ |
2965 | static int | |
d3da34e0 | 2966 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
2967 | { |
2968 | struct sortstr *s1 = (struct sortstr *)as1; | |
2969 | struct sortstr *s2 = (struct sortstr *)as2; | |
2970 | if (s1->size != s2->size) | |
c20998a7 | 2971 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 2972 | if (s1->priority != s2->priority) |
c20998a7 | 2973 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
2974 | return 0; |
2975 | } | |
2976 | ||
e8185fa8 | 2977 | static void |
93cb6be3 PE |
2978 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
2979 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 2980 | { |
d311d28c | 2981 | ptrdiff_t nbytes; |
43d27a72 | 2982 | |
e8185fa8 | 2983 | if (ssl->used == ssl->size) |
0065d054 | 2984 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 2985 | ssl->buf[ssl->used].string = str; |
cb26008f | 2986 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2987 | ssl->buf[ssl->used].size = size; |
2988 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2989 | ssl->used++; | |
43d27a72 | 2990 | |
4b4deea2 | 2991 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2992 | nbytes = SCHARS (str); |
43d27a72 | 2993 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2994 | nbytes = count_size_as_multibyte (SDATA (str), |
2995 | SBYTES (str)); | |
43d27a72 | 2996 | else |
d5db4077 | 2997 | nbytes = SBYTES (str); |
43d27a72 | 2998 | |
0065d054 PE |
2999 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3000 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3001 | ssl->bytes += nbytes; |
3002 | ||
cb26008f | 3003 | if (STRINGP (str2)) |
43d27a72 | 3004 | { |
4b4deea2 | 3005 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3006 | nbytes = SCHARS (str2); |
43d27a72 | 3007 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3008 | nbytes = count_size_as_multibyte (SDATA (str2), |
3009 | SBYTES (str2)); | |
43d27a72 | 3010 | else |
d5db4077 | 3011 | nbytes = SBYTES (str2); |
43d27a72 | 3012 | |
0065d054 PE |
3013 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3014 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3015 | ssl->bytes += nbytes; |
3016 | } | |
e8185fa8 | 3017 | } |
bbbe9545 KH |
3018 | |
3019 | /* Return the concatenation of the strings associated with overlays that | |
3020 | begin or end at POS, ignoring overlays that are specific to a window | |
3021 | other than W. The strings are concatenated in the appropriate order: | |
3022 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3023 | lower. Normally all of the after-strings come first, but zero-sized |
3024 | overlays have their after-strings ride along with the before-strings | |
3025 | because it would look strange to print them inside-out. | |
3026 | ||
3027 | Returns the string length, and stores the contents indirectly through | |
3028 | PSTR, if that variable is non-null. The string may be overwritten by | |
3029 | subsequent calls. */ | |
6b5d3b89 | 3030 | |
d311d28c PE |
3031 | ptrdiff_t |
3032 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3033 | { |
28545e04 | 3034 | Lisp_Object overlay, window, str; |
2410d73a | 3035 | struct Lisp_Overlay *ov; |
d311d28c | 3036 | ptrdiff_t startpos, endpos; |
4b4deea2 | 3037 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3038 | |
e8185fa8 KH |
3039 | overlay_heads.used = overlay_heads.bytes = 0; |
3040 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3041 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3042 | { |
2410d73a | 3043 | XSETMISC (overlay, ov); |
c2d5b10f | 3044 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3045 | |
3046 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3047 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3048 | if (endpos < pos) | |
3049 | break; | |
3050 | if (endpos != pos && startpos != pos) | |
3051 | continue; | |
3052 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3053 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3054 | continue; |
e8185fa8 KH |
3055 | if (startpos == pos |
3056 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3057 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3058 | (startpos == endpos |
3059 | ? Foverlay_get (overlay, Qafter_string) | |
3060 | : Qnil), | |
3061 | Foverlay_get (overlay, Qpriority), | |
3062 | endpos - startpos); | |
3063 | else if (endpos == pos | |
3064 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3065 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3066 | Foverlay_get (overlay, Qpriority), |
3067 | endpos - startpos); | |
bbbe9545 | 3068 | } |
2410d73a | 3069 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3070 | { |
2410d73a SM |
3071 | XSETMISC (overlay, ov); |
3072 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3073 | |
3074 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3075 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3076 | if (startpos > pos) | |
3077 | break; | |
e8185fa8 KH |
3078 | if (endpos != pos && startpos != pos) |
3079 | continue; | |
3080 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3081 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3082 | continue; |
e8185fa8 KH |
3083 | if (startpos == pos |
3084 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3085 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3086 | (startpos == endpos |
3087 | ? Foverlay_get (overlay, Qafter_string) | |
3088 | : Qnil), | |
3089 | Foverlay_get (overlay, Qpriority), | |
3090 | endpos - startpos); | |
3091 | else if (endpos == pos | |
3092 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3093 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3094 | Foverlay_get (overlay, Qpriority), |
3095 | endpos - startpos); | |
bbbe9545 | 3096 | } |
e8185fa8 KH |
3097 | if (overlay_tails.used > 1) |
3098 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3099 | cmp_for_strings); | |
3100 | if (overlay_heads.used > 1) | |
3101 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3102 | cmp_for_strings); | |
3103 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3104 | { |
e8185fa8 | 3105 | Lisp_Object tem; |
d311d28c | 3106 | ptrdiff_t i; |
9f4d7cde | 3107 | unsigned char *p; |
0065d054 | 3108 | ptrdiff_t total; |
bbbe9545 | 3109 | |
0065d054 PE |
3110 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3111 | memory_full (SIZE_MAX); | |
3112 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3113 | if (total > overlay_str_len) |
0065d054 PE |
3114 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3115 | total - overlay_str_len, -1, 1); | |
3116 | ||
bbbe9545 | 3117 | p = overlay_str_buf; |
e8185fa8 | 3118 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3119 | { |
d311d28c | 3120 | ptrdiff_t nbytes; |
e8185fa8 | 3121 | tem = overlay_tails.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; | |
bbbe9545 | 3126 | } |
e8185fa8 | 3127 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3128 | { |
d311d28c | 3129 | ptrdiff_t nbytes; |
e8185fa8 | 3130 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3131 | nbytes = copy_text (SDATA (tem), p, |
3132 | SBYTES (tem), | |
43d27a72 RS |
3133 | STRING_MULTIBYTE (tem), multibyte); |
3134 | p += nbytes; | |
cb26008f KH |
3135 | tem = overlay_heads.buf[i].string2; |
3136 | if (STRINGP (tem)) | |
3137 | { | |
d5db4077 KR |
3138 | nbytes = copy_text (SDATA (tem), p, |
3139 | SBYTES (tem), | |
43d27a72 RS |
3140 | STRING_MULTIBYTE (tem), multibyte); |
3141 | p += nbytes; | |
cb26008f | 3142 | } |
bbbe9545 | 3143 | } |
cb26008f KH |
3144 | if (p != overlay_str_buf + total) |
3145 | abort (); | |
bbbe9545 KH |
3146 | if (pstr) |
3147 | *pstr = overlay_str_buf; | |
e8185fa8 | 3148 | return total; |
bbbe9545 | 3149 | } |
e8185fa8 | 3150 | return 0; |
bbbe9545 KH |
3151 | } |
3152 | \f | |
5c4f68f1 | 3153 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3154 | |
2eec3b4e | 3155 | void |
d311d28c | 3156 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3157 | { |
2410d73a SM |
3158 | Lisp_Object overlay, beg, end; |
3159 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3160 | |
3161 | /* See if anything in overlays_before should move to overlays_after. */ | |
3162 | ||
3163 | /* We don't strictly need prev in this loop; it should always be nil. | |
3164 | But we use it for symmetry and in case that should cease to be true | |
3165 | with some future change. */ | |
2410d73a SM |
3166 | prev = NULL; |
3167 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3168 | { |
2410d73a SM |
3169 | next = tail->next; |
3170 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3171 | |
3172 | /* If the overlay is not valid, get rid of it. */ | |
3173 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3174 | #if 1 |
3175 | abort (); | |
3176 | #else | |
2eec3b4e RS |
3177 | { |
3178 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3179 | if (!NILP (prev)) | |
7539e11f | 3180 | XCDR (prev) = next; |
2eec3b4e | 3181 | else |
5c4f68f1 | 3182 | buf->overlays_before = next; |
2eec3b4e RS |
3183 | tail = prev; |
3184 | continue; | |
3185 | } | |
52f8ec73 | 3186 | #endif |
1ab256cb | 3187 | |
2eec3b4e RS |
3188 | beg = OVERLAY_START (overlay); |
3189 | end = OVERLAY_END (overlay); | |
1ab256cb | 3190 | |
2eec3b4e | 3191 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3192 | { |
2eec3b4e | 3193 | /* OVERLAY needs to be moved. */ |
d311d28c | 3194 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3195 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3196 | |
3197 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3198 | if (prev) |
3199 | prev->next = next; | |
2eec3b4e | 3200 | else |
5c4f68f1 | 3201 | buf->overlays_before = next; |
2eec3b4e RS |
3202 | |
3203 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3204 | other_prev = NULL; |
3205 | for (other = buf->overlays_after; other; | |
3206 | other_prev = other, other = other->next) | |
1ab256cb | 3207 | { |
6af718a4 | 3208 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3209 | |
2410d73a SM |
3210 | XSETMISC (otheroverlay, other); |
3211 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3212 | |
3213 | otherbeg = OVERLAY_START (otheroverlay); | |
3214 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3215 | break; | |
1ab256cb | 3216 | } |
2eec3b4e RS |
3217 | |
3218 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3219 | tail->next = other; |
3220 | if (other_prev) | |
3221 | other_prev->next = tail; | |
1ab256cb | 3222 | else |
5c4f68f1 | 3223 | buf->overlays_after = tail; |
2eec3b4e | 3224 | tail = prev; |
1ab256cb | 3225 | } |
2eec3b4e RS |
3226 | else |
3227 | /* We've reached the things that should stay in overlays_before. | |
3228 | All the rest of overlays_before must end even earlier, | |
3229 | so stop now. */ | |
3230 | break; | |
3231 | } | |
3232 | ||
3233 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3234 | prev = NULL; |
3235 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3236 | { |
2410d73a SM |
3237 | next = tail->next; |
3238 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3239 | |
3240 | /* If the overlay is not valid, get rid of it. */ | |
3241 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3242 | #if 1 |
3243 | abort (); | |
3244 | #else | |
2eec3b4e RS |
3245 | { |
3246 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3247 | if (!NILP (prev)) | |
7539e11f | 3248 | XCDR (prev) = next; |
2eec3b4e | 3249 | else |
5c4f68f1 | 3250 | buf->overlays_after = next; |
2eec3b4e RS |
3251 | tail = prev; |
3252 | continue; | |
3253 | } | |
52f8ec73 | 3254 | #endif |
2eec3b4e RS |
3255 | |
3256 | beg = OVERLAY_START (overlay); | |
3257 | end = OVERLAY_END (overlay); | |
3258 | ||
3259 | /* Stop looking, when we know that nothing further | |
3260 | can possibly end before POS. */ | |
3261 | if (OVERLAY_POSITION (beg) > pos) | |
3262 | break; | |
3263 | ||
3264 | if (OVERLAY_POSITION (end) <= pos) | |
3265 | { | |
3266 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3267 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3268 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3269 | |
3270 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3271 | if (prev) |
3272 | prev->next = next; | |
2eec3b4e | 3273 | else |
5c4f68f1 | 3274 | buf->overlays_after = next; |
2eec3b4e RS |
3275 | |
3276 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3277 | other_prev = NULL; |
3278 | for (other = buf->overlays_before; other; | |
3279 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3280 | { |
3281 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3282 | |
2410d73a SM |
3283 | XSETMISC (otheroverlay, other); |
3284 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3285 | |
3286 | otherend = OVERLAY_END (otheroverlay); | |
3287 | if (OVERLAY_POSITION (otherend) <= where) | |
3288 | break; | |
3289 | } | |
3290 | ||
3291 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3292 | tail->next = other; |
3293 | if (other_prev) | |
3294 | other_prev->next = tail; | |
2eec3b4e | 3295 | else |
5c4f68f1 | 3296 | buf->overlays_before = tail; |
2eec3b4e RS |
3297 | tail = prev; |
3298 | } | |
3299 | } | |
3300 | ||
c2d5b10f | 3301 | buf->overlay_center = pos; |
2eec3b4e | 3302 | } |
2b1bdf65 | 3303 | |
423cdb46 | 3304 | void |
d311d28c | 3305 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3306 | { |
3307 | /* After an insertion, the lists are still sorted properly, | |
3308 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3309 | if (current_buffer->overlay_center >= pos) |
3310 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3311 | } |
3312 | ||
3313 | void | |
d311d28c | 3314 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3315 | { |
c2d5b10f | 3316 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3317 | /* The deletion was to our right. No change needed; the before- and |
3318 | after-lists are still consistent. */ | |
3319 | ; | |
d311d28c | 3320 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3321 | /* The deletion was to our left. We need to adjust the center value |
3322 | to account for the change in position, but the lists are consistent | |
3323 | given the new value. */ | |
c2d5b10f | 3324 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3325 | else |
3326 | /* We're right in the middle. There might be things on the after-list | |
3327 | that now belong on the before-list. Recentering will move them, | |
3328 | and also update the center point. */ | |
3329 | recenter_overlay_lists (current_buffer, pos); | |
3330 | } | |
3331 | ||
2b1bdf65 KH |
3332 | /* Fix up overlays that were garbled as a result of permuting markers |
3333 | in the range START through END. Any overlay with at least one | |
3334 | endpoint in this range will need to be unlinked from the overlay | |
3335 | list and reinserted in its proper place. | |
3336 | Such an overlay might even have negative size at this point. | |
6b61353c | 3337 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3338 | void |
d311d28c | 3339 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3340 | { |
6af718a4 | 3341 | Lisp_Object overlay; |
5df8f01b PE |
3342 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3343 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3344 | /* These are either nil, indicating that before_list or after_list |
3345 | should be assigned, or the cons cell the cdr of which should be | |
3346 | assigned. */ | |
2410d73a | 3347 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3348 | /* 'Parent', likewise, indicates a cons cell or |
3349 | current_buffer->overlays_before or overlays_after, depending | |
3350 | which loop we're in. */ | |
2410d73a | 3351 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3352 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3353 | |
3354 | /* This algorithm shifts links around instead of consing and GCing. | |
3355 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3356 | well-formed list except that its last element, the CDR of beforep |
3357 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3358 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3359 | that before_list isn't initialized, although it may look | |
3360 | strange. */ | |
2410d73a | 3361 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3362 | { |
2410d73a | 3363 | XSETMISC (overlay, tail); |
6b61353c | 3364 | |
2b1bdf65 | 3365 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3366 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3367 | ||
3368 | /* If the overlay is backwards, make it empty. */ | |
3369 | if (endpos < startpos) | |
3370 | { | |
3371 | startpos = endpos; | |
3372 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3373 | Qnil); | |
3374 | } | |
3375 | ||
2b1bdf65 KH |
3376 | if (endpos < start) |
3377 | break; | |
60ebfdf3 | 3378 | |
2b1bdf65 KH |
3379 | if (endpos < end |
3380 | || (startpos >= start && startpos < end)) | |
3381 | { | |
2b1bdf65 KH |
3382 | /* Add it to the end of the wrong list. Later on, |
3383 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3384 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3385 | { |
2410d73a | 3386 | if (!afterp) |
1138e742 KR |
3387 | after_list = tail; |
3388 | else | |
2410d73a | 3389 | afterp->next = tail; |
1138e742 | 3390 | afterp = tail; |
2b1bdf65 KH |
3391 | } |
3392 | else | |
3393 | { | |
2410d73a | 3394 | if (!beforep) |
1138e742 KR |
3395 | before_list = tail; |
3396 | else | |
2410d73a | 3397 | beforep->next = tail; |
1138e742 | 3398 | beforep = tail; |
2b1bdf65 | 3399 | } |
2410d73a SM |
3400 | if (!parent) |
3401 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3402 | else |
2410d73a SM |
3403 | parent->next = tail->next; |
3404 | tail = tail->next; | |
2b1bdf65 KH |
3405 | } |
3406 | else | |
2410d73a | 3407 | parent = tail, tail = parent->next; |
2b1bdf65 | 3408 | } |
2410d73a | 3409 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3410 | { |
2410d73a | 3411 | XSETMISC (overlay, tail); |
6b61353c | 3412 | |
2b1bdf65 | 3413 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3414 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3415 | ||
3416 | /* If the overlay is backwards, make it empty. */ | |
3417 | if (endpos < startpos) | |
3418 | { | |
3419 | startpos = endpos; | |
3420 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3421 | Qnil); |
6b61353c KH |
3422 | } |
3423 | ||
2b1bdf65 KH |
3424 | if (startpos >= end) |
3425 | break; | |
6b61353c | 3426 | |
2b1bdf65 KH |
3427 | if (startpos >= start |
3428 | || (endpos >= start && endpos < end)) | |
3429 | { | |
c2d5b10f | 3430 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3431 | { |
2410d73a | 3432 | if (!afterp) |
1138e742 KR |
3433 | after_list = tail; |
3434 | else | |
2410d73a | 3435 | afterp->next = tail; |
1138e742 | 3436 | afterp = tail; |
2b1bdf65 KH |
3437 | } |
3438 | else | |
3439 | { | |
2410d73a | 3440 | if (!beforep) |
1138e742 KR |
3441 | before_list = tail; |
3442 | else | |
2410d73a | 3443 | beforep->next = tail; |
1138e742 | 3444 | beforep = tail; |
2b1bdf65 | 3445 | } |
2410d73a SM |
3446 | if (!parent) |
3447 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3448 | else |
2410d73a SM |
3449 | parent->next = tail->next; |
3450 | tail = tail->next; | |
2b1bdf65 KH |
3451 | } |
3452 | else | |
2410d73a | 3453 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3454 | } |
3455 | ||
3456 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3457 | and let the recenter function make it sane again. */ | |
2410d73a | 3458 | if (beforep) |
1138e742 | 3459 | { |
2410d73a | 3460 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3461 | current_buffer->overlays_before = before_list; |
3462 | } | |
c2d5b10f | 3463 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3464 | |
2410d73a | 3465 | if (afterp) |
1138e742 | 3466 | { |
2410d73a | 3467 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3468 | current_buffer->overlays_after = after_list; |
3469 | } | |
c2d5b10f | 3470 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3471 | } |
3b06f880 KH |
3472 | |
3473 | /* We have two types of overlay: the one whose ending marker is | |
3474 | after-insertion-marker (this is the usual case) and the one whose | |
3475 | ending marker is before-insertion-marker. When `overlays_before' | |
3476 | contains overlays of the latter type and the former type in this | |
3477 | order and both overlays end at inserting position, inserting a text | |
3478 | increases only the ending marker of the latter type, which results | |
3479 | in incorrect ordering of `overlays_before'. | |
3480 | ||
3481 | This function fixes ordering of overlays in the slot | |
3482 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3483 | was at PREV, and now is at POS. */ | |
3484 | ||
01136e9b | 3485 | void |
d311d28c | 3486 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3487 | { |
2410d73a SM |
3488 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3489 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3490 | Lisp_Object tem; | |
d311d28c | 3491 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3492 | |
3493 | /* After the insertion, the several overlays may be in incorrect | |
3494 | order. The possibility is that, in the list `overlays_before', | |
3495 | an overlay which ends at POS appears after an overlay which ends | |
3496 | at PREV. Since POS is greater than PREV, we must fix the | |
3497 | ordering of these overlays, by moving overlays ends at POS before | |
3498 | the overlays ends at PREV. */ | |
3499 | ||
3500 | /* At first, find a place where disordered overlays should be linked | |
3501 | in. It is where an overlay which end before POS exists. (i.e. an | |
3502 | overlay whose ending marker is after-insertion-marker if disorder | |
3503 | exists). */ | |
2410d73a SM |
3504 | while (tail |
3505 | && (XSETMISC (tem, tail), | |
3506 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3507 | { |
3508 | parent = tail; | |
2410d73a | 3509 | tail = tail->next; |
1138e742 | 3510 | } |
3b06f880 KH |
3511 | |
3512 | /* If we don't find such an overlay, | |
3513 | or the found one ends before PREV, | |
3514 | or the found one is the last one in the list, | |
3515 | we don't have to fix anything. */ | |
f93ad4cf | 3516 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3517 | return; |
3518 | ||
1138e742 KR |
3519 | right_pair = parent; |
3520 | parent = tail; | |
2410d73a | 3521 | tail = tail->next; |
3b06f880 | 3522 | |
1138e742 | 3523 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3524 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3525 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3526 | we found an overlay which ends before PREV, the remaining | |
3527 | overlays are in correct order. */ | |
2410d73a | 3528 | while (tail) |
3b06f880 | 3529 | { |
2410d73a SM |
3530 | XSETMISC (tem, tail); |
3531 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3532 | |
3533 | if (end == pos) | |
3534 | { /* This overlay is disordered. */ | |
2410d73a | 3535 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3536 | |
3537 | /* Unlink the found overlay. */ | |
2410d73a SM |
3538 | tail = found->next; |
3539 | parent->next = tail; | |
1138e742 KR |
3540 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3541 | and link it into the right place. */ | |
2410d73a | 3542 | if (!right_pair) |
1138e742 | 3543 | { |
2410d73a | 3544 | found->next = bp->overlays_before; |
1138e742 KR |
3545 | bp->overlays_before = found; |
3546 | } | |
3547 | else | |
3548 | { | |
2410d73a SM |
3549 | found->next = right_pair->next; |
3550 | right_pair->next = found; | |
1138e742 | 3551 | } |
3b06f880 KH |
3552 | } |
3553 | else if (end == prev) | |
1138e742 KR |
3554 | { |
3555 | parent = tail; | |
2410d73a | 3556 | tail = tail->next; |
1138e742 | 3557 | } |
3b06f880 KH |
3558 | else /* No more disordered overlay. */ |
3559 | break; | |
3560 | } | |
3561 | } | |
2eec3b4e | 3562 | \f |
52f8ec73 | 3563 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3564 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3565 | (Lisp_Object object) |
52f8ec73 JB |
3566 | { |
3567 | return (OVERLAYP (object) ? Qt : Qnil); | |
3568 | } | |
3569 | ||
acac2700 | 3570 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3571 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3572 | If omitted, BUFFER defaults to the current buffer. |
3573 | BEG and END may be integers or markers. | |
a625ee20 RS |
3574 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3575 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3576 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3577 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3578 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3579 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3580 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3581 | { |
3582 | Lisp_Object overlay; | |
5c4f68f1 | 3583 | struct buffer *b; |
2eec3b4e | 3584 | |
5c4f68f1 | 3585 | if (NILP (buffer)) |
67180c6a | 3586 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3587 | else |
b7826503 | 3588 | CHECK_BUFFER (buffer); |
883047b9 JB |
3589 | if (MARKERP (beg) |
3590 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3591 | error ("Marker points into wrong buffer"); | |
3592 | if (MARKERP (end) | |
3593 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3594 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3595 | |
b7826503 PJ |
3596 | CHECK_NUMBER_COERCE_MARKER (beg); |
3597 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3598 | |
883047b9 | 3599 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3600 | { |
c99fc30f KH |
3601 | Lisp_Object temp; |
3602 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3603 | } |
883047b9 JB |
3604 | |
3605 | b = XBUFFER (buffer); | |
3606 | ||
3607 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3608 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3609 | |
acac2700 RS |
3610 | if (!NILP (front_advance)) |
3611 | XMARKER (beg)->insertion_type = 1; | |
3612 | if (!NILP (rear_advance)) | |
3613 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3614 | |
48e2e3ba | 3615 | overlay = allocate_misc (); |
89ca3e1b | 3616 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3617 | XOVERLAY (overlay)->start = beg; |
3618 | XOVERLAY (overlay)->end = end; | |
3619 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3620 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3621 | |
177c0ea7 | 3622 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3623 | end = OVERLAY_END (overlay); |
c2d5b10f | 3624 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3625 | { |
3626 | if (b->overlays_after) | |
3627 | XOVERLAY (overlay)->next = b->overlays_after; | |
3628 | b->overlays_after = XOVERLAY (overlay); | |
3629 | } | |
2eec3b4e | 3630 | else |
2410d73a SM |
3631 | { |
3632 | if (b->overlays_before) | |
3633 | XOVERLAY (overlay)->next = b->overlays_before; | |
3634 | b->overlays_before = XOVERLAY (overlay); | |
3635 | } | |
2eec3b4e RS |
3636 | |
3637 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3638 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3639 | |
b61982dd JB |
3640 | /* We don't need to redisplay the region covered by the overlay, because |
3641 | the overlay has no properties at the moment. */ | |
3642 | ||
2eec3b4e RS |
3643 | return overlay; |
3644 | } | |
876aa27c RS |
3645 | \f |
3646 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3647 | ||
3648 | static void | |
d311d28c | 3649 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3650 | { |
876aa27c RS |
3651 | if (start > end) |
3652 | { | |
d311d28c | 3653 | ptrdiff_t temp = start; |
26f545d7 GM |
3654 | start = end; |
3655 | end = temp; | |
876aa27c RS |
3656 | } |
3657 | ||
481b5054 | 3658 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3659 | |
876aa27c RS |
3660 | /* If this is a buffer not in the selected window, |
3661 | we must do other windows. */ | |
3662 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3663 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3664 | /* If multiple windows show this buffer, we must do other windows. */ |
3665 | else if (buffer_shared > 1) | |
3666 | windows_or_buffers_changed = 1; | |
18700091 KS |
3667 | /* If we modify an overlay at the end of the buffer, we cannot |
3668 | be sure that window end is still valid. */ | |
3669 | else if (end >= ZV && start <= ZV) | |
3670 | windows_or_buffers_changed = 1; | |
876aa27c | 3671 | |
d8b9150f | 3672 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3673 | } |
2eec3b4e | 3674 | |
7b7ae965 DA |
3675 | /* Remove OVERLAY from LIST. */ |
3676 | ||
2410d73a | 3677 | static struct Lisp_Overlay * |
d3da34e0 | 3678 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3679 | { |
7b7ae965 DA |
3680 | register struct Lisp_Overlay *tail, **prev = &list; |
3681 | ||
3682 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3683 | if (tail == overlay) | |
2410d73a | 3684 | { |
7b7ae965 | 3685 | *prev = overlay->next; |
2410d73a SM |
3686 | overlay->next = NULL; |
3687 | break; | |
3688 | } | |
3689 | return list; | |
3690 | } | |
3691 | ||
5c4f68f1 | 3692 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3693 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3694 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3695 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3696 | buffer. */) |
5842a27b | 3697 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3698 | { |
471fe23d | 3699 | struct buffer *b, *ob = 0; |
0a4469c9 | 3700 | Lisp_Object obuffer; |
d311d28c | 3701 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3702 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3703 | |
b7826503 | 3704 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3705 | if (NILP (buffer)) |
3706 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3707 | if (NILP (buffer)) |
67180c6a | 3708 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3709 | CHECK_BUFFER (buffer); |
883047b9 | 3710 | |
471fe23d TN |
3711 | if (NILP (Fbuffer_live_p (buffer))) |
3712 | error ("Attempt to move overlay to a dead buffer"); | |
3713 | ||
883047b9 JB |
3714 | if (MARKERP (beg) |
3715 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3716 | error ("Marker points into wrong buffer"); | |
3717 | if (MARKERP (end) | |
3718 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3719 | error ("Marker points into wrong buffer"); | |
3720 | ||
b7826503 PJ |
3721 | CHECK_NUMBER_COERCE_MARKER (beg); |
3722 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3723 | |
471fe23d | 3724 | if (XINT (beg) > XINT (end)) |
02481186 | 3725 | { |
471fe23d TN |
3726 | Lisp_Object temp; |
3727 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3728 | } |
3729 | ||
9d7608b7 KH |
3730 | specbind (Qinhibit_quit, Qt); |
3731 | ||
0a4469c9 | 3732 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3733 | b = XBUFFER (buffer); |
471fe23d TN |
3734 | |
3735 | if (!NILP (obuffer)) | |
3736 | { | |
3737 | ob = XBUFFER (obuffer); | |
3738 | ||
3739 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3740 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3741 | ||
3742 | ob->overlays_before = | |
3743 | unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3744 | ob->overlays_after = | |
3745 | unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3746 | eassert (XOVERLAY (overlay)->next == NULL); | |
3747 | } | |
3748 | ||
3749 | /* Set the overlay boundaries, which may clip them. */ | |
3750 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3751 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3752 | ||
3753 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3754 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3755 | |
c82ed728 | 3756 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3757 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3758 | { |
3759 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3760 | if (ob) |
3761 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3762 | |
3763 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3764 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3765 | } |
c82ed728 JB |
3766 | else |
3767 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3768 | { | |
79cce3f2 PE |
3769 | if (o_beg == n_beg) |
3770 | modify_overlay (b, o_end, n_end); | |
3771 | else if (o_end == n_end) | |
3772 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 3773 | else |
79cce3f2 | 3774 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 3775 | } |
b61982dd | 3776 | |
471fe23d TN |
3777 | /* Delete the overlay if it is empty after clipping and has the |
3778 | evaporate property. */ | |
3779 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
3780 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 3781 | |
471fe23d TN |
3782 | /* Put the overlay into the new buffer's overlay lists, first on the |
3783 | wrong list. */ | |
3784 | if (n_end < b->overlay_center) | |
2410d73a | 3785 | { |
8f924df7 KH |
3786 | XOVERLAY (overlay)->next = b->overlays_after; |
3787 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3788 | } |
2eec3b4e | 3789 | else |
2410d73a | 3790 | { |
8f924df7 KH |
3791 | XOVERLAY (overlay)->next = b->overlays_before; |
3792 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3793 | } |
2eec3b4e RS |
3794 | |
3795 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3796 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3797 | |
0a4469c9 | 3798 | return unbind_to (count, overlay); |
2eec3b4e RS |
3799 | } |
3800 | ||
3801 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3802 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3803 | (Lisp_Object overlay) |
2eec3b4e | 3804 | { |
0a4469c9 | 3805 | Lisp_Object buffer; |
5c4f68f1 | 3806 | struct buffer *b; |
d311d28c | 3807 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 3808 | |
b7826503 | 3809 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3810 | |
0a4469c9 RS |
3811 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3812 | if (NILP (buffer)) | |
3813 | return Qnil; | |
3814 | ||
3815 | b = XBUFFER (buffer); | |
0a4469c9 | 3816 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3817 | |
471fe23d TN |
3818 | b->overlays_before |
3819 | = unchain_overlay (b->overlays_before, XOVERLAY (overlay)); | |
3820 | b->overlays_after | |
3821 | = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
2410d73a | 3822 | eassert (XOVERLAY (overlay)->next == NULL); |
471fe23d | 3823 | |
041a49a6 | 3824 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 3825 | |
e58c389d | 3826 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3827 | display optimizations for the affected buffer, on the basis that |
3828 | these strings may contain newlines. This is easier to do than to | |
3829 | check for that situation during redisplay. */ | |
3830 | if (!windows_or_buffers_changed | |
3831 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3832 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3833 | b->prevent_redisplay_optimizations_p = 1; | |
3834 | ||
0a4469c9 | 3835 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3836 | } |
3837 | \f | |
8ebafa8d JB |
3838 | /* Overlay dissection functions. */ |
3839 | ||
a7ca3326 | 3840 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3841 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3842 | (Lisp_Object overlay) |
8ebafa8d | 3843 | { |
b7826503 | 3844 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3845 | |
3846 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3847 | } | |
3848 | ||
a7ca3326 | 3849 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3850 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3851 | (Lisp_Object overlay) |
8ebafa8d | 3852 | { |
b7826503 | 3853 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3854 | |
3855 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3856 | } | |
3857 | ||
3858 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3859 | doc: /* Return the buffer OVERLAY belongs to. |
3860 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3861 | (Lisp_Object overlay) |
8ebafa8d | 3862 | { |
b7826503 | 3863 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3864 | |
3865 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3866 | } | |
3867 | ||
3868 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3869 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3870 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3871 | OVERLAY. */) |
5842a27b | 3872 | (Lisp_Object overlay) |
8ebafa8d | 3873 | { |
b7826503 | 3874 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3875 | |
48e2e3ba | 3876 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3877 | } |
3878 | ||
3879 | \f | |
2eec3b4e | 3880 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3881 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3882 | (Lisp_Object pos) |
2eec3b4e | 3883 | { |
b081724f | 3884 | ptrdiff_t len, noverlays; |
2eec3b4e | 3885 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3886 | Lisp_Object result; |
3887 | ||
b7826503 | 3888 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3889 | |
3890 | len = 10; | |
a9800ae8 | 3891 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 3892 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3893 | |
3894 | /* Put all the overlays we want in a vector in overlay_vec. | |
3895 | Store the length in len. */ | |
2a77a7d7 | 3896 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3897 | 0, 0, 0); |
2eec3b4e RS |
3898 | |
3899 | /* Make a list of them all. */ | |
3900 | result = Flist (noverlays, overlay_vec); | |
3901 | ||
9ac0d9e0 | 3902 | xfree (overlay_vec); |
2eec3b4e RS |
3903 | return result; |
3904 | } | |
3905 | ||
74514898 | 3906 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3907 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3908 | Overlap means that at least one character is contained within the overlay |
3909 | and also contained within the specified region. | |
7723e095 MR |
3910 | Empty overlays are included in the result if they are located at BEG, |
3911 | between BEG and END, or at END provided END denotes the position at the | |
3912 | end of the buffer. */) | |
5842a27b | 3913 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3914 | { |
21514da7 | 3915 | ptrdiff_t len, noverlays; |
74514898 | 3916 | Lisp_Object *overlay_vec; |
74514898 RS |
3917 | Lisp_Object result; |
3918 | ||
b7826503 PJ |
3919 | CHECK_NUMBER_COERCE_MARKER (beg); |
3920 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3921 | |
3922 | len = 10; | |
38182d90 | 3923 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
3924 | |
3925 | /* Put all the overlays we want in a vector in overlay_vec. | |
3926 | Store the length in len. */ | |
3927 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3928 | NULL, NULL); |
74514898 RS |
3929 | |
3930 | /* Make a list of them all. */ | |
3931 | result = Flist (noverlays, overlay_vec); | |
3932 | ||
3933 | xfree (overlay_vec); | |
3934 | return result; | |
3935 | } | |
3936 | ||
a7ca3326 | 3937 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3938 | 1, 1, 0, |
7ee72033 | 3939 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3940 | If there are no overlay boundaries from POS to (point-max), |
3941 | the value is (point-max). */) | |
5842a27b | 3942 | (Lisp_Object pos) |
2eec3b4e | 3943 | { |
b081724f | 3944 | ptrdiff_t i, len, noverlays; |
d311d28c | 3945 | ptrdiff_t endpos; |
2eec3b4e | 3946 | Lisp_Object *overlay_vec; |
2eec3b4e | 3947 | |
b7826503 | 3948 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3949 | |
3950 | len = 10; | |
38182d90 | 3951 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3952 | |
3953 | /* Put all the overlays we want in a vector in overlay_vec. | |
3954 | Store the length in len. | |
3955 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3956 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3957 | &endpos, 0, 1); |
2eec3b4e RS |
3958 | |
3959 | /* If any of these overlays ends before endpos, | |
3960 | use its ending point instead. */ | |
3961 | for (i = 0; i < noverlays; i++) | |
3962 | { | |
3963 | Lisp_Object oend; | |
d311d28c | 3964 | ptrdiff_t oendpos; |
2eec3b4e RS |
3965 | |
3966 | oend = OVERLAY_END (overlay_vec[i]); | |
3967 | oendpos = OVERLAY_POSITION (oend); | |
3968 | if (oendpos < endpos) | |
3969 | endpos = oendpos; | |
1ab256cb RM |
3970 | } |
3971 | ||
9ac0d9e0 | 3972 | xfree (overlay_vec); |
2eec3b4e RS |
3973 | return make_number (endpos); |
3974 | } | |
239c932b | 3975 | |
a7ca3326 | 3976 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 3977 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 3978 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
3979 | If there are no overlay boundaries from (point-min) to POS, |
3980 | the value is (point-min). */) | |
5842a27b | 3981 | (Lisp_Object pos) |
239c932b | 3982 | { |
d311d28c | 3983 | ptrdiff_t prevpos; |
239c932b | 3984 | Lisp_Object *overlay_vec; |
b081724f | 3985 | ptrdiff_t len; |
239c932b | 3986 | |
b7826503 | 3987 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3988 | |
624bbdc4 RS |
3989 | /* At beginning of buffer, we know the answer; |
3990 | avoid bug subtracting 1 below. */ | |
3991 | if (XINT (pos) == BEGV) | |
3992 | return pos; | |
3993 | ||
017f0539 | 3994 | len = 10; |
38182d90 | 3995 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 3996 | |
239c932b RS |
3997 | /* Put all the overlays we want in a vector in overlay_vec. |
3998 | Store the length in len. | |
daa1c109 | 3999 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4000 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4001 | 0, &prevpos, 1); |
239c932b | 4002 | |
239c932b RS |
4003 | xfree (overlay_vec); |
4004 | return make_number (prevpos); | |
4005 | } | |
2eec3b4e RS |
4006 | \f |
4007 | /* These functions are for debugging overlays. */ | |
4008 | ||
4009 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4010 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4011 | The car has all the overlays before the overlay center; |
4012 | the cdr has all the overlays after the overlay center. | |
4013 | Recentering overlays moves overlays between these lists. | |
4014 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4015 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4016 | (void) |
2eec3b4e | 4017 | { |
2410d73a SM |
4018 | struct Lisp_Overlay *ol; |
4019 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4020 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4021 | { | |
4022 | XSETMISC (tmp, ol); | |
4023 | before = Fcons (tmp, before); | |
4024 | } | |
4025 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4026 | { | |
4027 | XSETMISC (tmp, ol); | |
4028 | after = Fcons (tmp, after); | |
4029 | } | |
4030 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4031 | } |
4032 | ||
4033 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4034 | doc: /* Recenter the overlays of the current buffer around position POS. |
4035 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4036 | for positions far away from POS). */) | |
5842a27b | 4037 | (Lisp_Object pos) |
2eec3b4e | 4038 | { |
d311d28c | 4039 | ptrdiff_t p; |
b7826503 | 4040 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4041 | |
d311d28c PE |
4042 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4043 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4044 | return Qnil; |
4045 | } | |
4046 | \f | |
a7ca3326 | 4047 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4048 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4049 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4050 | { |
b7826503 | 4051 | CHECK_OVERLAY (overlay); |
9a593927 | 4052 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4053 | } |
4054 | ||
4055 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4056 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4057 | VALUE will be returned.*/) | |
5842a27b | 4058 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4059 | { |
48e2e3ba | 4060 | Lisp_Object tail, buffer; |
9d7608b7 | 4061 | int changed; |
2eec3b4e | 4062 | |
b7826503 | 4063 | CHECK_OVERLAY (overlay); |
b61982dd | 4064 | |
274a9425 RS |
4065 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4066 | ||
48e2e3ba | 4067 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4068 | CONSP (tail) && CONSP (XCDR (tail)); |
4069 | tail = XCDR (XCDR (tail))) | |
4070 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4071 | { |
7539e11f | 4072 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4073 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4074 | goto found; |
274a9425 | 4075 | } |
9d7608b7 KH |
4076 | /* It wasn't in the list, so add it to the front. */ |
4077 | changed = !NILP (value); | |
48e2e3ba KH |
4078 | XOVERLAY (overlay)->plist |
4079 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4080 | found: |
4081 | if (! NILP (buffer)) | |
4082 | { | |
4083 | if (changed) | |
876aa27c | 4084 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4085 | marker_position (OVERLAY_START (overlay)), |
4086 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4087 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4088 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4089 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4090 | Fdelete_overlay (overlay); | |
4091 | } | |
7d63db98 | 4092 | |
2eec3b4e | 4093 | return value; |
1ab256cb RM |
4094 | } |
4095 | \f | |
9115729e KH |
4096 | /* Subroutine of report_overlay_modification. */ |
4097 | ||
4098 | /* Lisp vector holding overlay hook functions to call. | |
4099 | Vector elements come in pairs. | |
4100 | Each even-index element is a list of hook functions. | |
4101 | The following odd-index element is the overlay they came from. | |
4102 | ||
4103 | Before the buffer change, we fill in this vector | |
4104 | as we call overlay hook functions. | |
4105 | After the buffer change, we get the functions to call from this vector. | |
4106 | This way we always call the same functions before and after the change. */ | |
4107 | static Lisp_Object last_overlay_modification_hooks; | |
4108 | ||
4109 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4110 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4111 | |
4112 | /* Add one functionlist/overlay pair | |
4113 | to the end of last_overlay_modification_hooks. */ | |
4114 | ||
4115 | static void | |
d3da34e0 | 4116 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4117 | { |
d311d28c | 4118 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4119 | |
d311d28c PE |
4120 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4121 | last_overlay_modification_hooks = | |
4122 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4123 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4124 | functionlist); last_overlay_modification_hooks_used++; | |
4125 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4126 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4127 | } |
4128 | \f | |
173f2a64 RS |
4129 | /* Run the modification-hooks of overlays that include |
4130 | any part of the text in START to END. | |
9115729e KH |
4131 | If this change is an insertion, also |
4132 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4133 | and the insert-after-hooks of overlay ending at START. |
4134 | ||
4135 | This is called both before and after the modification. | |
4136 | AFTER is nonzero when we call after the modification. | |
4137 | ||
9115729e KH |
4138 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4139 | When AFTER is nonzero, they are the start position, | |
4140 | the position after the inserted new text, | |
4141 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4142 | |
4143 | void | |
d3da34e0 JB |
4144 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4145 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4146 | { |
2410d73a SM |
4147 | Lisp_Object prop, overlay; |
4148 | struct Lisp_Overlay *tail; | |
9115729e KH |
4149 | /* 1 if this change is an insertion. */ |
4150 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4151 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4152 | |
4153 | overlay = Qnil; | |
2410d73a | 4154 | tail = NULL; |
9115729e | 4155 | |
27c6b98e SM |
4156 | /* We used to run the functions as soon as we found them and only register |
4157 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4158 | case. But running elisp code as we traverse the list of overlays is | |
4159 | painful because the list can be modified by the elisp code so we had to | |
4160 | copy at several places. We now simply do a read-only traversal that | |
4161 | only collects the functions to run and we run them afterwards. It's | |
4162 | simpler, especially since all the code was already there. -stef */ | |
4163 | ||
a615c6dc | 4164 | if (!after) |
173f2a64 | 4165 | { |
a615c6dc SM |
4166 | /* We are being called before a change. |
4167 | Scan the overlays to find the functions to call. */ | |
4168 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4169 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4170 | { |
d311d28c | 4171 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4172 | Lisp_Object ostart, oend; |
4173 | ||
2410d73a | 4174 | XSETMISC (overlay, tail); |
a615c6dc SM |
4175 | |
4176 | ostart = OVERLAY_START (overlay); | |
4177 | oend = OVERLAY_END (overlay); | |
4178 | endpos = OVERLAY_POSITION (oend); | |
4179 | if (XFASTINT (start) > endpos) | |
4180 | break; | |
4181 | startpos = OVERLAY_POSITION (ostart); | |
4182 | if (insertion && (XFASTINT (start) == startpos | |
4183 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4184 | { |
a615c6dc SM |
4185 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4186 | if (!NILP (prop)) | |
4187 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4188 | } |
a615c6dc SM |
4189 | if (insertion && (XFASTINT (start) == endpos |
4190 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4191 | { |
a615c6dc SM |
4192 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4193 | if (!NILP (prop)) | |
4194 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4195 | } |
a615c6dc SM |
4196 | /* Test for intersecting intervals. This does the right thing |
4197 | for both insertion and deletion. */ | |
4198 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4199 | { |
a615c6dc SM |
4200 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4201 | if (!NILP (prop)) | |
4202 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4203 | } |
173f2a64 | 4204 | } |
60ebfdf3 | 4205 | |
2410d73a | 4206 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4207 | { |
d311d28c | 4208 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4209 | Lisp_Object ostart, oend; |
4210 | ||
2410d73a | 4211 | XSETMISC (overlay, tail); |
a615c6dc SM |
4212 | |
4213 | ostart = OVERLAY_START (overlay); | |
4214 | oend = OVERLAY_END (overlay); | |
4215 | startpos = OVERLAY_POSITION (ostart); | |
4216 | endpos = OVERLAY_POSITION (oend); | |
4217 | if (XFASTINT (end) < startpos) | |
4218 | break; | |
4219 | if (insertion && (XFASTINT (start) == startpos | |
4220 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4221 | { |
a615c6dc SM |
4222 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4223 | if (!NILP (prop)) | |
4224 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4225 | } |
a615c6dc SM |
4226 | if (insertion && (XFASTINT (start) == endpos |
4227 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4228 | { |
a615c6dc SM |
4229 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4230 | if (!NILP (prop)) | |
4231 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4232 | } |
a615c6dc SM |
4233 | /* Test for intersecting intervals. This does the right thing |
4234 | for both insertion and deletion. */ | |
4235 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4236 | { |
a615c6dc SM |
4237 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4238 | if (!NILP (prop)) | |
4239 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4240 | } |
173f2a64 RS |
4241 | } |
4242 | } | |
55b48893 | 4243 | |
a615c6dc SM |
4244 | GCPRO4 (overlay, arg1, arg2, arg3); |
4245 | { | |
4246 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4247 | First copy the vector contents, in case some of these hooks | |
4248 | do subsequent modification of the buffer. */ | |
d311d28c | 4249 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4250 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4251 | ptrdiff_t i; |
a615c6dc | 4252 | |
72af86bd AS |
4253 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4254 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4255 | gcpro1.var = copy; |
4256 | gcpro1.nvars = size; | |
4257 | ||
4258 | for (i = 0; i < size;) | |
4259 | { | |
8f54f30a PE |
4260 | Lisp_Object prop_i, overlay_i; |
4261 | prop_i = copy[i++]; | |
4262 | overlay_i = copy[i++]; | |
4263 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4264 | } |
4265 | } | |
55b48893 | 4266 | UNGCPRO; |
173f2a64 RS |
4267 | } |
4268 | ||
4269 | static void | |
d3da34e0 JB |
4270 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4271 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4272 | { |
930a9140 | 4273 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4274 | |
930a9140 | 4275 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4276 | |
6d70a280 | 4277 | while (CONSP (list)) |
173f2a64 | 4278 | { |
930a9140 | 4279 | if (NILP (arg3)) |
6d70a280 | 4280 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4281 | else |
6d70a280 SM |
4282 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4283 | list = XCDR (list); | |
173f2a64 RS |
4284 | } |
4285 | UNGCPRO; | |
4286 | } | |
9d7608b7 KH |
4287 | |
4288 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4289 | property is set. */ | |
4290 | void | |
d311d28c | 4291 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4292 | { |
2410d73a SM |
4293 | Lisp_Object overlay, hit_list; |
4294 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4295 | |
4296 | hit_list = Qnil; | |
c2d5b10f | 4297 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4298 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4299 | { |
d311d28c | 4300 | ptrdiff_t endpos; |
2410d73a | 4301 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4302 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4303 | if (endpos < pos) | |
4304 | break; | |
4305 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4306 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4307 | hit_list = Fcons (overlay, hit_list); |
4308 | } | |
4309 | else | |
2410d73a | 4310 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4311 | { |
d311d28c | 4312 | ptrdiff_t startpos; |
2410d73a | 4313 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4314 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4315 | if (startpos > pos) | |
4316 | break; | |
4317 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4318 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4319 | hit_list = Fcons (overlay, hit_list); |
4320 | } | |
7539e11f KR |
4321 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4322 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4323 | } |
173f2a64 | 4324 | \f |
54dfdeb0 | 4325 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4326 | in the slot with offset OFFSET. */ |
4327 | ||
0fa3ba92 | 4328 | void |
d3da34e0 | 4329 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4330 | { |
ad97b375 | 4331 | Lisp_Object predicate; |
177c0ea7 | 4332 | |
64e16c3c | 4333 | switch (type) |
0fa3ba92 | 4334 | { |
2de9f71c | 4335 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4336 | case Lisp_String: predicate = Qstringp; break; |
4337 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4338 | default: abort (); | |
0fa3ba92 JB |
4339 | } |
4340 | ||
ad97b375 | 4341 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4342 | } |
7c02e886 | 4343 | |
0fa3ba92 | 4344 | \f |
b86af064 GM |
4345 | /*********************************************************************** |
4346 | Allocation with mmap | |
4347 | ***********************************************************************/ | |
4348 | ||
4349 | #ifdef USE_MMAP_FOR_BUFFERS | |
4350 | ||
4351 | #include <sys/types.h> | |
4352 | #include <sys/mman.h> | |
4353 | ||
4354 | #ifndef MAP_ANON | |
4355 | #ifdef MAP_ANONYMOUS | |
4356 | #define MAP_ANON MAP_ANONYMOUS | |
4357 | #else | |
4358 | #define MAP_ANON 0 | |
4359 | #endif | |
4360 | #endif | |
4361 | ||
09dfdf85 GM |
4362 | #ifndef MAP_FAILED |
4363 | #define MAP_FAILED ((void *) -1) | |
4364 | #endif | |
4365 | ||
b86af064 | 4366 | #include <stdio.h> |
b86af064 GM |
4367 | |
4368 | #if MAP_ANON == 0 | |
4369 | #include <fcntl.h> | |
4370 | #endif | |
4371 | ||
4372 | #include "coding.h" | |
4373 | ||
4374 | ||
4375 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4376 | The current implementation lets the system select mapped | |
4377 | addresses; we're not using MAP_FIXED in general, except when | |
4378 | trying to enlarge regions. | |
4379 | ||
4380 | Each mapped region starts with a mmap_region structure, the user | |
4381 | area starts after that structure, aligned to MEM_ALIGN. | |
4382 | ||
4383 | +-----------------------+ | |
4384 | | struct mmap_info + | | |
4385 | | padding | | |
4386 | +-----------------------+ | |
4387 | | user data | | |
4388 | | | | |
4389 | | | | |
4390 | +-----------------------+ */ | |
4391 | ||
4392 | struct mmap_region | |
4393 | { | |
4394 | /* User-specified size. */ | |
4395 | size_t nbytes_specified; | |
177c0ea7 | 4396 | |
b86af064 GM |
4397 | /* Number of bytes mapped */ |
4398 | size_t nbytes_mapped; | |
4399 | ||
4400 | /* Pointer to the location holding the address of the memory | |
4401 | allocated with the mmap'd block. The variable actually points | |
4402 | after this structure. */ | |
261cb4bb | 4403 | void **var; |
b86af064 GM |
4404 | |
4405 | /* Next and previous in list of all mmap'd regions. */ | |
4406 | struct mmap_region *next, *prev; | |
4407 | }; | |
4408 | ||
4409 | /* Doubly-linked list of mmap'd regions. */ | |
4410 | ||
4411 | static struct mmap_region *mmap_regions; | |
4412 | ||
4413 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4414 | /dev/zero will be opened on it. */ | |
4415 | ||
4416 | static int mmap_fd; | |
4417 | ||
4418 | /* Temporary storage for mmap_set_vars, see there. */ | |
4419 | ||
4420 | static struct mmap_region *mmap_regions_1; | |
4421 | static int mmap_fd_1; | |
4422 | ||
4423 | /* Page size on this system. */ | |
4424 | ||
4425 | static int mmap_page_size; | |
4426 | ||
cd1181db | 4427 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4428 | |
4429 | static int mmap_initialized_p; | |
4430 | ||
4431 | /* Value is X rounded up to the next multiple of N. */ | |
4432 | ||
4433 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4434 | ||
4435 | /* Size of mmap_region structure plus padding. */ | |
4436 | ||
4437 | #define MMAP_REGION_STRUCT_SIZE \ | |
4438 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4439 | ||
4440 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4441 | region, return a pointer to the start of the region. */ | |
4442 | ||
4443 | #define MMAP_REGION(P) \ | |
4444 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4445 | ||
4446 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4447 | to the start of the user-visible part of the region. */ | |
4448 | ||
4449 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4450 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4451 | |
4452 | #define MEM_ALIGN sizeof (double) | |
4453 | ||
7273faa1 DL |
4454 | /* Predicate returning true if part of the address range [START .. END] |
4455 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4456 | memory mapping. |
4457 | ||
da6062e6 | 4458 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4459 | something else. This can be overridden by system configuration |
4460 | files if system-specific means to determine this exists. */ | |
4461 | ||
4462 | #ifndef MMAP_ALLOCATED_P | |
4463 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4464 | #endif | |
4465 | ||
53964682 | 4466 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4467 | |
1dae0f0a AS |
4468 | static void |
4469 | mmap_init (void) | |
4470 | { | |
4471 | #if MAP_ANON == 0 | |
4472 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4473 | in a dumped Emacs. */ | |
4474 | if (mmap_fd <= 0) | |
4475 | { | |
4476 | /* No anonymous mmap -- we need the file descriptor. */ | |
4477 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4478 | if (mmap_fd == -1) | |
4479 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4480 | } | |
4481 | #endif /* MAP_ANON == 0 */ | |
4482 | ||
4483 | if (mmap_initialized_p) | |
4484 | return; | |
4485 | mmap_initialized_p = 1; | |
b86af064 | 4486 | |
1dae0f0a AS |
4487 | #if MAP_ANON != 0 |
4488 | mmap_fd = -1; | |
4489 | #endif | |
4490 | ||
4491 | mmap_page_size = getpagesize (); | |
4492 | } | |
b86af064 GM |
4493 | |
4494 | /* Return a region overlapping address range START...END, or null if | |
4495 | none. END is not including, i.e. the last byte in the range | |
4496 | is at END - 1. */ | |
4497 | ||
4498 | static struct mmap_region * | |
261cb4bb | 4499 | mmap_find (void *start, void *end) |
b86af064 GM |
4500 | { |
4501 | struct mmap_region *r; | |
4502 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4503 | |
b86af064 GM |
4504 | for (r = mmap_regions; r; r = r->next) |
4505 | { | |
4506 | char *rstart = (char *) r; | |
4507 | char *rend = rstart + r->nbytes_mapped; | |
4508 | ||
4509 | if (/* First byte of range, i.e. START, in this region? */ | |
4510 | (s >= rstart && s < rend) | |
4511 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4512 | || (e > rstart && e <= rend) | |
4513 | /* First byte of this region in the range? */ | |
4514 | || (rstart >= s && rstart < e) | |
4515 | /* Last byte of this region in the range? */ | |
4516 | || (rend > s && rend <= e)) | |
4517 | break; | |
4518 | } | |
4519 | ||
4520 | return r; | |
4521 | } | |
4522 | ||
4523 | ||
4524 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4525 | the region. Value is non-zero if successful. */ | |
4526 | ||
4527 | static int | |
1dae0f0a | 4528 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4529 | { |
4530 | if (r->next) | |
4531 | r->next->prev = r->prev; | |
4532 | if (r->prev) | |
4533 | r->prev->next = r->next; | |
4534 | else | |
4535 | mmap_regions = r->next; | |
177c0ea7 | 4536 | |
261cb4bb | 4537 | if (munmap (r, r->nbytes_mapped) == -1) |
b86af064 GM |
4538 | { |
4539 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4540 | return 0; | |
4541 | } | |
4542 | ||
4543 | return 1; | |
4544 | } | |
4545 | ||
4546 | ||
4547 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4548 | Value is non-zero if successful. */ | |
4549 | ||
4550 | static int | |
1dae0f0a | 4551 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4552 | { |
4553 | char *region_end = (char *) r + r->nbytes_mapped; | |
4554 | size_t nbytes; | |
4555 | int success = 0; | |
4556 | ||
4557 | if (npages < 0) | |
4558 | { | |
4559 | /* Unmap pages at the end of the region. */ | |
4560 | nbytes = - npages * mmap_page_size; | |
4561 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4562 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4563 | else | |
4564 | { | |
4565 | r->nbytes_mapped -= nbytes; | |
4566 | success = 1; | |
4567 | } | |
4568 | } | |
4569 | else if (npages > 0) | |
4570 | { | |
b86af064 | 4571 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4572 | |
b86af064 GM |
4573 | /* Try to map additional pages at the end of the region. We |
4574 | cannot do this if the address range is already occupied by | |
4575 | something else because mmap deletes any previous mapping. | |
4576 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4577 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4578 | { |
261cb4bb | 4579 | void *p; |
177c0ea7 | 4580 | |
b86af064 GM |
4581 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4582 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4583 | if (p == MAP_FAILED) | |
edaa9aed | 4584 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4585 | else if (p != region_end) |
b86af064 GM |
4586 | { |
4587 | /* Kernels are free to choose a different address. In | |
4588 | that case, unmap what we've mapped above; we have | |
4589 | no use for it. */ | |
4590 | if (munmap (p, nbytes) == -1) | |
4591 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4592 | } | |
4593 | else | |
4594 | { | |
4595 | r->nbytes_mapped += nbytes; | |
4596 | success = 1; | |
4597 | } | |
4598 | } | |
4599 | } | |
4600 | ||
4601 | return success; | |
4602 | } | |
4603 | ||
4604 | ||
4605 | /* Set or reset variables holding references to mapped regions. If | |
4606 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4607 | non-zero, set all variables to the start of the user-areas | |
4608 | of mapped regions. | |
4609 | ||
4610 | This function is called from Fdump_emacs to ensure that the dumped | |
4611 | Emacs doesn't contain references to memory that won't be mapped | |
4612 | when Emacs starts. */ | |
4613 | ||
4614 | void | |
1dae0f0a | 4615 | mmap_set_vars (int restore_p) |
b86af064 GM |
4616 | { |
4617 | struct mmap_region *r; | |
4618 | ||
4619 | if (restore_p) | |
4620 | { | |
4621 | mmap_regions = mmap_regions_1; | |
4622 | mmap_fd = mmap_fd_1; | |
4623 | for (r = mmap_regions; r; r = r->next) | |
4624 | *r->var = MMAP_USER_AREA (r); | |
4625 | } | |
4626 | else | |
4627 | { | |
4628 | for (r = mmap_regions; r; r = r->next) | |
4629 | *r->var = NULL; | |
4630 | mmap_regions_1 = mmap_regions; | |
4631 | mmap_regions = NULL; | |
4632 | mmap_fd_1 = mmap_fd; | |
4633 | mmap_fd = -1; | |
4634 | } | |
4635 | } | |
4636 | ||
4637 | ||
4638 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4639 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4640 | address of some variable which will use the data area. | |
4641 | ||
4642 | The allocation of 0 bytes is valid. | |
4643 | ||
4644 | If we can't allocate the necessary memory, set *VAR to null, and | |
4645 | return null. */ | |
4646 | ||
261cb4bb PE |
4647 | static void * |
4648 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4649 | { |
4650 | void *p; | |
4651 | size_t map; | |
4652 | ||
4653 | mmap_init (); | |
4654 | ||
4655 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4656 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4657 | mmap_fd, 0); | |
177c0ea7 | 4658 | |
b86af064 GM |
4659 | if (p == MAP_FAILED) |
4660 | { | |
4661 | if (errno != ENOMEM) | |
4662 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4663 | p = NULL; | |
4664 | } | |
4665 | else | |
4666 | { | |
4667 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4668 | |
b86af064 GM |
4669 | r->nbytes_specified = nbytes; |
4670 | r->nbytes_mapped = map; | |
4671 | r->var = var; | |
4672 | r->prev = NULL; | |
4673 | r->next = mmap_regions; | |
4674 | if (r->next) | |
4675 | r->next->prev = r; | |
4676 | mmap_regions = r; | |
177c0ea7 | 4677 | |
b86af064 GM |
4678 | p = MMAP_USER_AREA (p); |
4679 | } | |
177c0ea7 | 4680 | |
b86af064 GM |
4681 | return *var = p; |
4682 | } | |
4683 | ||
4684 | ||
1dae0f0a AS |
4685 | /* Free a block of relocatable storage whose data is pointed to by |
4686 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4687 | ||
4688 | static void | |
261cb4bb | 4689 | mmap_free (void **var) |
1dae0f0a AS |
4690 | { |
4691 | mmap_init (); | |
4692 | ||
4693 | if (*var) | |
4694 | { | |
4695 | mmap_free_1 (MMAP_REGION (*var)); | |
4696 | *var = NULL; | |
4697 | } | |
4698 | } | |
4699 | ||
4700 | ||
b86af064 GM |
4701 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4702 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4703 | and return this value. If more memory cannot be allocated, then | |
4704 | leave *VAR unchanged, and return null. */ | |
4705 | ||
261cb4bb PE |
4706 | static void * |
4707 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4708 | { |
261cb4bb | 4709 | void *result; |
177c0ea7 | 4710 | |
b86af064 GM |
4711 | mmap_init (); |
4712 | ||
4713 | if (*var == NULL) | |
4714 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4715 | else if (nbytes == 0) |
b86af064 GM |
4716 | { |
4717 | mmap_free (var); | |
4718 | result = mmap_alloc (var, nbytes); | |
4719 | } | |
4720 | else | |
4721 | { | |
4722 | struct mmap_region *r = MMAP_REGION (*var); | |
4723 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4724 | |
b86af064 GM |
4725 | if (room < nbytes) |
4726 | { | |
4727 | /* Must enlarge. */ | |
261cb4bb | 4728 | void *old_ptr = *var; |
b86af064 GM |
4729 | |
4730 | /* Try to map additional pages at the end of the region. | |
4731 | If that fails, allocate a new region, copy data | |
4732 | from the old region, then free it. */ | |
4733 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4734 | / mmap_page_size))) | |
4735 | { | |
4736 | r->nbytes_specified = nbytes; | |
4737 | *var = result = old_ptr; | |
4738 | } | |
4739 | else if (mmap_alloc (var, nbytes)) | |
4740 | { | |
72af86bd | 4741 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4742 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4743 | result = *var; | |
4744 | r = MMAP_REGION (result); | |
4745 | r->nbytes_specified = nbytes; | |
4746 | } | |
4747 | else | |
4748 | { | |
4749 | *var = old_ptr; | |
4750 | result = NULL; | |
4751 | } | |
4752 | } | |
4753 | else if (room - nbytes >= mmap_page_size) | |
4754 | { | |
4755 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4756 | memory back to the system. |
4757 | ||
4758 | The extra parens are to make the division happens first, | |
4759 | on positive values, so we know it will round towards | |
4760 | zero. */ | |
bb63c5c9 | 4761 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4762 | result = *var; |
4763 | r->nbytes_specified = nbytes; | |
4764 | } | |
4765 | else | |
4766 | { | |
4767 | /* Leave it alone. */ | |
4768 | result = *var; | |
4769 | r->nbytes_specified = nbytes; | |
4770 | } | |
4771 | } | |
4772 | ||
4773 | return result; | |
4774 | } | |
4775 | ||
4776 | ||
b86af064 GM |
4777 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4778 | ||
4779 | ||
4780 | \f | |
4781 | /*********************************************************************** | |
4782 | Buffer-text Allocation | |
4783 | ***********************************************************************/ | |
4784 | ||
b86af064 GM |
4785 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
4786 | ||
4787 | static void | |
fd05c7e9 | 4788 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 4789 | { |
261cb4bb | 4790 | void *p; |
177c0ea7 | 4791 | |
b86af064 GM |
4792 | BLOCK_INPUT; |
4793 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4794 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4795 | #elif defined REL_ALLOC |
261cb4bb | 4796 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4797 | #else |
815add84 | 4798 | p = xmalloc (nbytes); |
b86af064 | 4799 | #endif |
177c0ea7 | 4800 | |
b86af064 GM |
4801 | if (p == NULL) |
4802 | { | |
4803 | UNBLOCK_INPUT; | |
531b0165 | 4804 | memory_full (nbytes); |
b86af064 GM |
4805 | } |
4806 | ||
4807 | b->text->beg = (unsigned char *) p; | |
4808 | UNBLOCK_INPUT; | |
4809 | } | |
4810 | ||
4811 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4812 | shrink it. */ | |
4813 | ||
4814 | void | |
d311d28c | 4815 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 4816 | { |
261cb4bb | 4817 | void *p; |
fd05c7e9 PE |
4818 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4819 | + delta); | |
b86af064 GM |
4820 | BLOCK_INPUT; |
4821 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4822 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4823 | #elif defined REL_ALLOC |
261cb4bb | 4824 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
4825 | #else |
4826 | p = xrealloc (b->text->beg, nbytes); | |
4827 | #endif | |
177c0ea7 | 4828 | |
b86af064 GM |
4829 | if (p == NULL) |
4830 | { | |
4831 | UNBLOCK_INPUT; | |
531b0165 | 4832 | memory_full (nbytes); |
b86af064 GM |
4833 | } |
4834 | ||
4835 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4836 | UNBLOCK_INPUT; | |
4837 | } | |
4838 | ||
4839 | ||
4840 | /* Free buffer B's text buffer. */ | |
4841 | ||
4842 | static void | |
d3da34e0 | 4843 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4844 | { |
4845 | BLOCK_INPUT; | |
4846 | ||
4847 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4848 | mmap_free ((void **) &b->text->beg); |
b86af064 | 4849 | #elif defined REL_ALLOC |
261cb4bb | 4850 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
4851 | #else |
4852 | xfree (b->text->beg); | |
4853 | #endif | |
177c0ea7 | 4854 | |
b86af064 GM |
4855 | BUF_BEG_ADDR (b) = NULL; |
4856 | UNBLOCK_INPUT; | |
4857 | } | |
4858 | ||
4859 | ||
4860 | \f | |
4861 | /*********************************************************************** | |
4862 | Initialization | |
4863 | ***********************************************************************/ | |
4864 | ||
dfcf069d | 4865 | void |
d3da34e0 | 4866 | init_buffer_once (void) |
1ab256cb | 4867 | { |
7c02e886 | 4868 | int idx; |
3884d954 DA |
4869 | /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make |
4870 | sure that this is still correct. Otherwise, mark_vectorlike may not | |
4871 | trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */ | |
38182d90 | 4872 | const int pvecsize |
3884d954 DA |
4873 | = (offsetof (struct buffer, own_text) - sizeof (struct vectorlike_header)) |
4874 | / sizeof (Lisp_Object); | |
7c02e886 | 4875 | |
72af86bd | 4876 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4877 | |
1ab256cb RM |
4878 | /* Make sure all markable slots in buffer_defaults |
4879 | are initialized reasonably, so mark_buffer won't choke. */ | |
4880 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4881 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4882 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4883 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4884 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4885 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4886 | /* Prevent GC from getting confused. */ |
4887 | buffer_defaults.text = &buffer_defaults.own_text; | |
4888 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4889 | BUF_INTERVALS (&buffer_defaults) = 0; |
4890 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
3884d954 | 4891 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, pvecsize); |
67180c6a | 4892 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3884d954 | 4893 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, pvecsize); |
67180c6a | 4894 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4895 | |
4896 | /* Set up the default values of various buffer slots. */ | |
4897 | /* Must do these before making the first buffer! */ | |
4898 | ||
f532dca0 | 4899 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4900 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4901 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4902 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4903 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4904 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4905 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4906 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
4b4deea2 | 4907 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
4b4deea2 TT |
4908 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4909 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4910 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4911 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4912 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4913 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4914 | buffer_defaults.overlays_before = NULL; |
4915 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4916 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4917 | |
4b4deea2 TT |
4918 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4919 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4920 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4921 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4cc60b9b | 4922 | BVAR (&buffer_defaults, bidi_display_reordering) = Qt; |
4b4deea2 TT |
4923 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; |
4924 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4925 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4926 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4927 | |
4b4deea2 TT |
4928 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4929 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4930 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4931 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4932 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4933 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4934 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4935 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4936 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4937 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4938 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4939 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4940 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4941 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4942 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4943 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4944 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4945 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4946 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4947 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4948 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4949 | |
4950 | /* Assign the local-flags to the slots that have default values. | |
4951 | The local flag is a bit that is used in the buffer | |
4952 | to say that it has its own local value for the slot. | |
4953 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4954 | ||
4955 | /* Nothing can work if this isn't true */ | |
d6202519 | 4956 | { verify (sizeof (EMACS_INT) == sizeof (Lisp_Object)); } |
1ab256cb RM |
4957 | |
4958 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4959 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4960 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4961 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4962 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4963 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4964 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4965 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4966 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4967 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
4968 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
4969 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
4970 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
4971 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
4972 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
4973 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
4974 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
4975 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
4976 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
4977 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 4978 | |
7c02e886 | 4979 | idx = 1; |
4b4deea2 TT |
4980 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
4981 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
4982 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
4983 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
4984 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
4985 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 4986 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
4987 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
4988 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
4989 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
4990 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
4991 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
4992 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
4993 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
4994 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
4995 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
4996 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
4997 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
4998 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
4999 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5000 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5001 | /* Make this one a permanent local. */ |
7c02e886 | 5002 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5003 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5004 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5005 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5006 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5007 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5008 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5009 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5010 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5011 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5014 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5016 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5017 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5018 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5019 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5020 | |
5021 | /* Need more room? */ | |
7313acd0 | 5022 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5023 | abort (); |
7313acd0 | 5024 | last_per_buffer_idx = idx; |
177c0ea7 | 5025 | |
1ab256cb RM |
5026 | Vbuffer_alist = Qnil; |
5027 | current_buffer = 0; | |
5028 | all_buffers = 0; | |
5029 | ||
f4265f6c | 5030 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5031 | |
d67b4f80 | 5032 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5033 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5034 | |
d67b4f80 | 5035 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5036 | |
d67b4f80 | 5037 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5038 | |
d67b4f80 | 5039 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5040 | |
d67b4f80 | 5041 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5042 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5043 | |
1ab256cb | 5044 | /* super-magic invisible buffer */ |
d67b4f80 | 5045 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5046 | Vbuffer_alist = Qnil; |
5047 | ||
d67b4f80 | 5048 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5049 | |
5050 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5051 | } |
5052 | ||
dfcf069d | 5053 | void |
d3da34e0 | 5054 | init_buffer (void) |
1ab256cb | 5055 | { |
2381d133 | 5056 | char *pwd; |
136351b7 | 5057 | Lisp_Object temp; |
965d34eb | 5058 | ptrdiff_t len; |
1ab256cb | 5059 | |
b86af064 | 5060 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5061 | { |
5062 | /* When using the ralloc implementation based on mmap(2), buffer | |
5063 | text pointers will have been set to null in the dumped Emacs. | |
5064 | Map new memory. */ | |
5065 | struct buffer *b; | |
177c0ea7 | 5066 | |
f61f41d7 | 5067 | for (b = all_buffers; b; b = b->header.next.buffer) |
93c27ef1 | 5068 | if (b->text->beg == NULL) |
b86af064 | 5069 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5070 | } |
b86af064 | 5071 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5072 | |
1ab256cb | 5073 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5074 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5075 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5076 | |
01537133 | 5077 | pwd = get_current_dir_name (); |
a17b5ed1 | 5078 | |
156bdb41 | 5079 | if (!pwd) |
a17b5ed1 | 5080 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5081 | |
1ab256cb RM |
5082 | /* Maybe this should really use some standard subroutine |
5083 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5084 | len = strlen (pwd); |
5085 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5086 | { |
156bdb41 | 5087 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5088 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5089 | if (!pwd) |
5090 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5091 | pwd[len] = DIRECTORY_SEP; |
5092 | pwd[len + 1] = '\0'; | |
f7975d07 | 5093 | } |
0995fa35 | 5094 | |
4b4deea2 TT |
5095 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5096 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5097 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5098 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5099 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5100 | BVAR (current_buffer, directory) |
5101 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5102 | |
0995fa35 RS |
5103 | /* Add /: to the front of the name |
5104 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5105 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5106 | if (! NILP (temp) |
5107 | /* If the default dir is just /, TEMP is non-nil | |
5108 | because of the ange-ftp completion handler. | |
5109 | However, it is not necessary to turn / into /:/. | |
5110 | So avoid doing that. */ | |
4b4deea2 TT |
5111 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5112 | BVAR (current_buffer, directory) | |
5113 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5114 | |
136351b7 | 5115 | temp = get_minibuffer (0); |
4b4deea2 | 5116 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5117 | |
5118 | free (pwd); | |
1ab256cb RM |
5119 | } |
5120 | ||
d6aa1876 SM |
5121 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5122 | Object stored in the current buffer. address is the address of the slot | |
5123 | in the buffer that is current now. */ | |
5124 | ||
5125 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5126 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5127 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5128 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5129 | VNAME is the name of the buffer slot. |
5130 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5131 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5132 | do { \ | |
5133 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5134 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5135 | } while (0) |
d6aa1876 SM |
5136 | |
5137 | static void | |
8ea90aa3 | 5138 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5139 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5140 | { |
ce5b453a | 5141 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5142 | int offset; |
5143 | ||
ce5b453a | 5144 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5145 | offset = (char *)address - (char *)current_buffer; |
5146 | ||
ce5b453a SM |
5147 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5148 | bo_fwd->offset = offset; | |
5149 | bo_fwd->slottype = type; | |
b9598260 | 5150 | sym->declared_special = 1; |
ce5b453a SM |
5151 | sym->redirect = SYMBOL_FORWARDED; |
5152 | { | |
5153 | /* I tried to do the job without a cast, but it seems impossible. | |
5154 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5155 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5156 | } | |
5157 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5158 | |
5159 | if (PER_BUFFER_IDX (offset) == 0) | |
5160 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5161 | slot of buffer_local_flags */ | |
5162 | abort (); | |
5163 | } | |
5164 | ||
5165 | ||
1ab256cb | 5166 | /* initialize the buffer routines */ |
dfcf069d | 5167 | void |
d3da34e0 | 5168 | syms_of_buffer (void) |
1ab256cb | 5169 | { |
9115729e KH |
5170 | staticpro (&last_overlay_modification_hooks); |
5171 | last_overlay_modification_hooks | |
5172 | = Fmake_vector (make_number (10), Qnil); | |
5173 | ||
1ab256cb RM |
5174 | staticpro (&Vbuffer_defaults); |
5175 | staticpro (&Vbuffer_local_symbols); | |
5176 | staticpro (&Qfundamental_mode); | |
5177 | staticpro (&Qmode_class); | |
5178 | staticpro (&QSFundamental); | |
5179 | staticpro (&Vbuffer_alist); | |
5180 | staticpro (&Qprotected_field); | |
5181 | staticpro (&Qpermanent_local); | |
5182 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5183 | |
5184 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5185 | DEFSYM (Qoverlayp, "overlayp"); | |
5186 | DEFSYM (Qevaporate, "evaporate"); | |
5187 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5188 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5189 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5190 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5191 | DEFSYM (Qpriority, "priority"); | |
5192 | DEFSYM (Qbefore_string, "before-string"); | |
5193 | DEFSYM (Qafter_string, "after-string"); | |
5194 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5195 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5196 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5197 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5198 | ||
1ab256cb | 5199 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5200 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5201 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5202 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5203 | |
422745d0 TT |
5204 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5205 | mode_line_format, | |
5206 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5207 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5208 | |
422745d0 TT |
5209 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5210 | header_line_format, | |
5211 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5212 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5213 | |
422745d0 TT |
5214 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5215 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5216 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5217 | |
422745d0 TT |
5218 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5219 | extra_line_spacing, | |
5220 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5221 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5222 | |
422745d0 TT |
5223 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5224 | cursor_in_non_selected_windows, | |
5225 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5226 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5227 | ||
422745d0 TT |
5228 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5229 | abbrev_mode, | |
5230 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5231 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5232 | |
422745d0 TT |
5233 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5234 | ctl_arrow, | |
5235 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5236 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5237 | |
422745d0 TT |
5238 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5239 | enable_multibyte_characters, | |
fb7ada5f | 5240 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5241 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5242 | |
422745d0 TT |
5243 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5244 | buffer_file_coding_system, | |
5245 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5246 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5247 | |
422745d0 TT |
5248 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5249 | truncate_lines, | |
5250 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5251 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5252 | |
422745d0 TT |
5253 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5254 | fill_column, | |
5255 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5256 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5257 | |
422745d0 TT |
5258 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5259 | left_margin, | |
5260 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5261 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5262 | |
422745d0 TT |
5263 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5264 | tab_width, | |
5265 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5266 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5267 | |
422745d0 TT |
5268 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5269 | case_fold_search, | |
5270 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5271 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5272 | |
422745d0 TT |
5273 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5274 | left_margin_cols, | |
5275 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5276 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5277 | |
422745d0 TT |
5278 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5279 | right_margin_cols, | |
5280 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5281 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5282 | |
422745d0 TT |
5283 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5284 | left_fringe_width, | |
5285 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5286 | This is the same as (default-value 'left-fringe-width). */); |
5287 | ||
422745d0 TT |
5288 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5289 | right_fringe_width, | |
5290 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5291 | This is the same as (default-value 'right-fringe-width). */); |
5292 | ||
422745d0 TT |
5293 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5294 | fringes_outside_margins, | |
5295 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5296 | This is the same as (default-value 'fringes-outside-margins). */); |
5297 | ||
422745d0 TT |
5298 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5299 | scroll_bar_width, | |
5300 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5301 | This is the same as (default-value 'scroll-bar-width). */); |
5302 | ||
422745d0 TT |
5303 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5304 | vertical_scroll_bar_type, | |
5305 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5306 | This is the same as (default-value 'vertical-scroll-bar). */); |
5307 | ||
422745d0 TT |
5308 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5309 | indicate_empty_lines, | |
5310 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5311 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5312 | |
422745d0 TT |
5313 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5314 | indicate_buffer_boundaries, | |
5315 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5316 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5317 | ||
422745d0 TT |
5318 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5319 | fringe_indicator_alist, | |
5320 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5321 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5322 | ||
422745d0 TT |
5323 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5324 | fringe_cursor_alist, | |
5325 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5326 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5327 | ||
422745d0 TT |
5328 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5329 | scroll_up_aggressively, | |
5330 | doc: /* Default value of `scroll-up-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-up-aggressively). */); |
177c0ea7 | 5333 | |
422745d0 TT |
5334 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5335 | scroll_down_aggressively, | |
5336 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5337 | This value applies in buffers that don't have their own local values. |
fc961256 | 5338 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5339 | |
045dee35 | 5340 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5341 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5342 | Qnil, |
7614d762 RS |
5343 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5344 | The header line appears, optionally, at the top of a window; | |
5345 | the mode line appears at the bottom. */); | |
177c0ea7 | 5346 | |
4b4deea2 | 5347 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5348 | Qnil, |
5349 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5350 | |
5351 | The value may be nil, a string, a symbol or a list. | |
5352 | ||
018ba359 | 5353 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5354 | |
5355 | For any symbol other than t or nil, the symbol's value is processed as | |
5356 | a mode line construct. As a special exception, if that value is a | |
5357 | string, the string is processed verbatim, without handling any | |
5358 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5359 | `risky-local-variable' property, all properties in any strings, as | |
5360 | well as all :eval and :propertize forms in the value, are ignored. | |
5361 | ||
5362 | A list whose car is a string or list is processed by processing each | |
5363 | of the list elements recursively, as separate mode line constructs, | |
5364 | and concatenating the results. | |
5365 | ||
5366 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5367 | using the result as a mode line construct. Be careful--FORM should | |
5368 | not load any files, because that can cause an infinite recursion. | |
5369 | ||
5370 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5371 | processing ELT as the mode line construct, and adding the text | |
5372 | properties PROPS to the result. | |
5373 | ||
5374 | A list whose car is a symbol is processed by examining the symbol's | |
5375 | value, and, if that value is non-nil, processing the cadr of the list | |
5376 | recursively; and if that value is nil, processing the caddr of the | |
5377 | list recursively. | |
5378 | ||
5379 | A list whose car is an integer is processed by processing the cadr of | |
5380 | the list, and padding (if the number is positive) or truncating (if | |
5381 | negative) to the width specified by that number. | |
5382 | ||
018ba359 | 5383 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5384 | %b -- print buffer name. %f -- print visited file name. |
5385 | %F -- print frame name. | |
5386 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5387 | %& is like %*, but ignore read-only-ness. | |
5388 | % means buffer is read-only and * means it is modified. | |
5389 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5390 | %s -- print process status. %l -- print the current line number. | |
5391 | %c -- print the current column number (this makes editing slower). | |
5392 | To make the column number update correctly in all cases, | |
5393 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5394 | %i -- print the size of the buffer. |
5395 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5396 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5397 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5398 | or print Bottom or All. | |
018ba359 | 5399 | %n -- print Narrow if appropriate. |
dafbe726 | 5400 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5401 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5402 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5403 | %e -- print error message about full memory. |
f7165034 NR |
5404 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5405 | remote machine. | |
018ba359 PJ |
5406 | %[ -- print one [ for each recursive editing level. %] similar. |
5407 | %% -- print %. %- -- print infinitely many dashes. | |
5408 | Decimal digits after the % specify field width to which to pad. */); | |
5409 | ||
422745d0 | 5410 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5411 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5412 | |
4b4deea2 | 5413 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5414 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5415 | doc: /* Symbol for current buffer's major mode. |
5416 | The default value (normally `fundamental-mode') affects new buffers. | |
5417 | A value of nil means to use the current buffer's major mode, provided | |
5418 | it is not marked as "special". | |
5419 | ||
5420 | When a mode is used by default, `find-file' switches to it before it | |
5421 | reads the contents into the buffer and before it finishes setting up | |
5422 | the buffer. Thus, the mode and its hooks should not expect certain | |
5423 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5424 | to be set up. */); | |
1ab256cb | 5425 | |
4b4deea2 | 5426 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5427 | Qnil, |
64a7c220 | 5428 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5429 | Usually a string, but can use any of the constructs for `mode-line-format', |
5430 | which see. | |
5431 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5432 | |
4b4deea2 | 5433 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5434 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5435 | ||
4b4deea2 | 5436 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5437 | doc: /* Non-nil if Abbrev mode is enabled. |
5438 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5439 | |
4b4deea2 | 5440 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5441 | Qnil, |
fb7ada5f | 5442 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5443 | |
4b4deea2 | 5444 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5445 | make_number (LISP_INT_TAG), |
fb7ada5f | 5446 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5447 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5448 | |
4b4deea2 | 5449 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5450 | make_number (LISP_INT_TAG), |
fb7ada5f | 5451 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5452 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5453 | |
4b4deea2 | 5454 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5455 | make_number (LISP_INT_TAG), |
fb7ada5f | 5456 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5457 | This should be an integer greater than zero. */); |
1ab256cb | 5458 | |
4b4deea2 | 5459 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5460 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5461 | A value of nil means use backslash and octal digits. |
5462 | This variable does not apply to characters whose display is specified | |
5463 | in the current display table (if there is one). */); | |
1ab256cb | 5464 | |
3b06f880 | 5465 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5466 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5467 | Qnil, |
efc7e75f | 5468 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5469 | Otherwise they are regarded as unibyte. This affects the display, |
5470 | file I/O and the behavior of various editing commands. | |
5471 | ||
5472 | This variable is buffer-local but you cannot set it directly; | |
5473 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5474 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5475 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5476 | |
c71b5d9b | 5477 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5478 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5479 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5480 | This variable applies to saving the buffer, and also to `write-region' |
5481 | and other functions that use `write-region'. | |
5482 | It does not apply to sending output to subprocesses, however. | |
5483 | ||
5484 | If this is nil, the buffer is saved without any code conversion | |
5485 | unless some coding system is specified in `file-coding-system-alist' | |
5486 | for the buffer file. | |
5487 | ||
31a6cb06 EZ |
5488 | If the text to be saved cannot be encoded as specified by this variable, |
5489 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5490 | ||
018ba359 PJ |
5491 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5492 | ||
5493 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5494 | |
f44e260c | 5495 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5496 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5497 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5498 | |
6c0cf218 | 5499 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5500 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5501 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5502 | |
b44d9321 EZ |
5503 | If this is nil (the default), the direction of each paragraph is |
5504 | determined by the first strong directional character of its text. | |
5505 | The values of `right-to-left' and `left-to-right' override that. | |
5506 | Any other value is treated as nil. | |
b4bf28b7 | 5507 | |
b44d9321 EZ |
5508 | This variable has no effect unless the buffer's value of |
5509 | \`bidi-display-reordering' is non-nil. */); | |
5510 | ||
4b4deea2 | 5511 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5512 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5513 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5514 | |
5515 | Note that this is overridden by the variable | |
5516 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5517 | and this buffer is not full-frame width. |
5518 | ||
5519 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5520 | |
4b4deea2 | 5521 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5522 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5523 | When word-wrapping is on, continuation lines are wrapped at the space |
5524 | or tab character nearest to the right window edge. | |
5525 | If nil, continuation lines are wrapped at the right screen edge. | |
5526 | ||
5527 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5528 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5529 | word-wrapping, you might want to reduce the value of | |
5530 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5531 | in narrower windows. |
5532 | ||
5533 | Instead of setting this variable directly, most users should use | |
5534 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5535 | to t, and additionally redefines simple editing commands to act on | |
5536 | visual lines rather than logical lines. See the documentation of | |
5537 | `visual-line-mode'. */); | |
0858cd02 | 5538 | |
4b4deea2 | 5539 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5540 | make_number (Lisp_String), |
efc7e75f | 5541 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5542 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5543 | |
4b4deea2 | 5544 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5545 | Qnil, |
efc7e75f | 5546 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5547 | It is called after self-inserting any character specified in |
5548 | the `auto-fill-chars' table. | |
5549 | NOTE: This variable is not a hook; | |
5550 | its value may not be a list of functions. */); | |
1ab256cb | 5551 | |
4b4deea2 | 5552 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5553 | make_number (Lisp_String), |
efc7e75f | 5554 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5555 | |
4b4deea2 | 5556 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5557 | make_number (Lisp_String), |
efc7e75f | 5558 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5559 | The truename of a file is calculated by `file-truename' |
5560 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5561 | |
1ab256cb | 5562 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5563 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5564 | make_number (Lisp_String), |
7614d762 RS |
5565 | doc: /* Name of file for auto-saving current buffer. |
5566 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5567 | |
4b4deea2 | 5568 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5569 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5570 | |
4b4deea2 | 5571 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5572 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5573 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5574 | |
4b4deea2 | 5575 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5576 | make_number (LISP_INT_TAG), |
efc7e75f | 5577 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5578 | 0 initially. |
5579 | -1 means auto-saving turned off until next real save. | |
5580 | ||
5581 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5582 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5583 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5584 | |
4b4deea2 | 5585 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5586 | Qnil, |
7614d762 | 5587 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5588 | An integer N as value means display only lines |
5589 | that start with less than N columns of space. | |
7614d762 RS |
5590 | A value of t means that the character ^M makes itself and |
5591 | all the rest of the line invisible; also, when saving the buffer | |
5592 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5593 | |
1ab256cb | 5594 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5595 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5596 | Qnil, |
3f676284 | 5597 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5598 | |
4b4deea2 | 5599 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5600 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5601 | The value should be one of `overwrite-mode-textual', |
5602 | `overwrite-mode-binary', or nil. | |
5603 | If it is `overwrite-mode-textual', self-insertion still | |
5604 | inserts at the end of a line, and inserts when point is before a tab, | |
5605 | until the tab is filled in. | |
5606 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5607 | ||
4b4deea2 | 5608 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5609 | Qnil, |
efc7e75f | 5610 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5611 | |
5612 | If this variable is nil, the value of `standard-display-table' is used. | |
5613 | Each window can have its own, overriding display table, see | |
5614 | `set-window-display-table' and `window-display-table'. | |
5615 | ||
5616 | The display table is a char-table created with `make-display-table'. | |
5617 | A char-table is an array indexed by character codes. Normal array | |
5618 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5619 | ||
5620 | Each of the char-table elements control how to display the corresponding | |
5621 | text character: the element at index C in the table says how to display | |
5622 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5623 | characters or nil. The value nil means display the character in the |
5624 | default fashion; otherwise, the characters from the vector are delivered | |
5625 | to the screen instead of the original character. | |
018ba359 | 5626 | |
5fd11dc8 | 5627 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5628 | to display a capital Y instead of each X character. |
018ba359 PJ |
5629 | |
5630 | In addition, a char-table has six extra slots to control the display of: | |
5631 | ||
5632 | the end of a truncated screen line (extra-slot 0, a single character); | |
5633 | the end of a continued line (extra-slot 1, a single character); | |
5634 | the escape character used to display character codes in octal | |
5635 | (extra-slot 2, a single character); | |
5636 | the character used as an arrow for control characters (extra-slot 3, | |
5637 | a single character); | |
5638 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5639 | a vector of characters); | |
5640 | the character used to draw the border between side-by-side windows | |
5641 | (extra-slot 5, a single character). | |
5642 | ||
5643 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5644 | |
4b4deea2 | 5645 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5646 | Qnil, |
fb7ada5f | 5647 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5648 | A value of nil means no marginal area. */); |
177c0ea7 | 5649 | |
4b4deea2 | 5650 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5651 | Qnil, |
fb7ada5f | 5652 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5653 | A value of nil means no marginal area. */); |
177c0ea7 | 5654 | |
4b4deea2 | 5655 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5656 | Qnil, |
fb7ada5f | 5657 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5658 | A value of 0 means no left fringe is shown in this buffer's window. |
5659 | A value of nil means to use the left fringe width from the window's frame. */); | |
5660 | ||
4b4deea2 | 5661 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5662 | Qnil, |
fb7ada5f | 5663 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5664 | A value of 0 means no right fringe is shown in this buffer's window. |
5665 | A value of nil means to use the right fringe width from the window's frame. */); | |
5666 | ||
4b4deea2 | 5667 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5668 | Qnil, |
fb7ada5f | 5669 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5670 | A value of nil means to display fringes between margins and buffer text. */); |
5671 | ||
4b4deea2 | 5672 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5673 | Qnil, |
fb7ada5f | 5674 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5675 | A value of nil means to use the scroll bar width from the window's frame. */); |
5676 | ||
4b4deea2 | 5677 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5678 | Qnil, |
fb7ada5f | 5679 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5680 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5681 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5682 | |
fc2c8887 RS |
5683 | A value of `left' or `right' means put the vertical scroll bar at that side |
5684 | of the window; a value of nil means don't show any vertical scroll bars. | |
5685 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5686 | |
0552666b | 5687 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5688 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5689 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5690 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5691 | window-systems. */); | |
177c0ea7 | 5692 | |
6b61353c | 5693 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5694 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5695 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5696 | If non-nil, the first and last line of the buffer are marked in the fringe |
5697 | of a window on window-systems with angle bitmaps, or if the window can be | |
5698 | scrolled, the top and bottom line of the window are marked with up and down | |
5699 | arrow bitmaps. | |
b2229037 KS |
5700 | |
5701 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5702 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5703 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5704 | the left fringe but no arrows. |
b2229037 | 5705 | |
79e3497d RS |
5706 | You can exercise more precise control by using an alist as the |
5707 | value. Each alist element (INDICATOR . POSITION) specifies | |
5708 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5709 | `bottom', `up', `down', or t, which specifies the default position, |
5710 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5711 | this indicator. | |
5712 | ||
5713 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5714 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5715 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5716 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5717 | |
c6a46372 | 5718 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5719 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5720 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5721 | The value is an alist where each element (INDICATOR . BITMAPS) |
5722 | specifies the fringe bitmaps used to display a specific logical | |
5723 | fringe indicator. | |
5724 | ||
5725 | INDICATOR specifies the logical indicator type which is one of the | |
5726 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5727 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5728 | |
14fb5704 | 5729 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5730 | the actual bitmap shown in the left or right fringe for the logical |
5731 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5732 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5733 | are used only for the `bottom' and `top-bottom' indicators when the |
5734 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5735 | symbol which is used in both left and right fringes. */); |
5736 | ||
5737 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5738 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5739 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5740 | The value is an alist where each element (CURSOR . BITMAP) |
5741 | specifies the fringe bitmaps used to display a specific logical | |
5742 | cursor type in the fringe. | |
5743 | ||
5744 | CURSOR specifies the logical cursor type which is one of the following | |
5745 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5746 | one is used to show a hollow cursor on narrow lines display lines | |
5747 | where the normal hollow cursor will not fit. | |
5748 | ||
5749 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5750 | cursor type. */); | |
5751 | ||
0552666b | 5752 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5753 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5754 | doc: /* How far to scroll windows upward. |
5755 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5756 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5757 | means scroll to center point. A fraction means scroll to put point |
5758 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5759 | When the value is 0.0, point goes at the bottom line, which in the |
5760 | simple case that you moved off with C-f means scrolling just one line. | |
5761 | 1.0 means point goes at the top, so that in that simple case, the | |
5762 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5763 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5764 | |
0552666b | 5765 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5766 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5767 | doc: /* How far to scroll windows downward. |
5768 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5769 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5770 | means scroll to center point. A fraction means scroll to put point |
5771 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5772 | When the value is 0.0, point goes at the top line, which in the |
5773 | simple case that you moved off with C-b means scrolling just one line. | |
5774 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5775 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5776 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5777 | |
1ab256cb RM |
5778 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5779 | "Don't ask."); | |
5780 | */ | |
1ab256cb | 5781 | |
29208e82 | 5782 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5783 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5784 | Two arguments are passed to each function: the positions of |
5785 | the beginning and end of the range of old text to be changed. | |
5786 | \(For an insertion, the beginning and end are at the same place.) | |
5787 | No information is given about the length of the text after the change. | |
5788 | ||
5789 | Buffer changes made while executing the `before-change-functions' | |
5790 | don't call any before-change or after-change functions. | |
7b2bf907 | 5791 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5792 | |
5793 | If an unhandled error happens in running these functions, | |
5794 | the variable's value remains nil. That prevents the error | |
5795 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5796 | Vbefore_change_functions = Qnil; |
5797 | ||
29208e82 | 5798 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5799 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5800 | Three arguments are passed to each function: the positions of |
5801 | the beginning and end of the range of changed text, | |
5802 | and the length in bytes of the pre-change text replaced by that range. | |
5803 | \(For an insertion, the pre-change length is zero; | |
5804 | for a deletion, that length is the number of bytes deleted, | |
5805 | and the post-change beginning and end are at the same place.) | |
5806 | ||
5807 | Buffer changes made while executing the `after-change-functions' | |
5808 | don't call any before-change or after-change functions. | |
7b2bf907 | 5809 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5810 | |
5811 | If an unhandled error happens in running these functions, | |
5812 | the variable's value remains nil. That prevents the error | |
5813 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5814 | Vafter_change_functions = Qnil; |
5815 | ||
29208e82 | 5816 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5817 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5818 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5819 | Vfirst_change_hook = Qnil; |
1ab256cb | 5820 | |
4b4deea2 | 5821 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5822 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5823 | Recent changes come first; older changes follow newer. |
5824 | ||
5825 | An entry (BEG . END) represents an insertion which begins at | |
5826 | position BEG and ends at position END. | |
5827 | ||
5828 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5829 | from (abs POSITION). If POSITION is positive, point was at the front | |
5830 | of the text being deleted; if negative, point was at the end. | |
5831 | ||
d35af63c PE |
5832 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
5833 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
5834 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
5835 | modification time of the most recent save is different, this entry is |
5836 | obsolete. | |
5837 | ||
5838 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5839 | was modified between BEG and END. PROPERTY is the property name, | |
5840 | and VALUE is the old value. | |
5841 | ||
7405f386 KS |
5842 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5843 | \(apply FUN-NAME ARGS). | |
5844 | ||
5845 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5846 | in the active region. BEG and END is the range affected by this entry | |
5847 | and DELTA is the number of bytes added or deleted in that range by | |
5848 | this change. | |
c6c7dc03 | 5849 | |
018ba359 PJ |
5850 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5851 | was adjusted in position by the offset DISTANCE (an integer). | |
5852 | ||
5853 | An entry of the form POSITION indicates that point was at the buffer | |
5854 | location given by the integer. Undoing an entry of this form places | |
5855 | point at POSITION. | |
5856 | ||
b4c4f2f4 JB |
5857 | Entries with value `nil' mark undo boundaries. The undo command treats |
5858 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5859 | |
5860 | If the value of the variable is t, undo information is not recorded. */); | |
5861 | ||
4b4deea2 | 5862 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5863 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5864 | |
4b4deea2 | 5865 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5866 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5867 | |
5868 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5869 | newlines. Columnar operations (like `move-to-column' and |
5870 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5871 | widths as they go. This works well for ordinary text, but if the |
5872 | buffer's lines are very long (say, more than 500 characters), these | |
5873 | motion functions will take longer to execute. Emacs may also take | |
5874 | longer to update the display. | |
5875 | ||
5629f29b | 5876 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5877 | results of their scans, and consult the cache to avoid rescanning |
5878 | regions of the buffer until the text is modified. The caches are most | |
5879 | beneficial when they prevent the most searching---that is, when the | |
5880 | buffer contains long lines and large regions of characters with the | |
5881 | same, fixed screen width. | |
5882 | ||
5629f29b | 5883 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5884 | become slightly slower (because of the overhead of consulting the |
5885 | cache), and the caches will use memory roughly proportional to the | |
5886 | number of newlines and characters whose screen width varies. | |
5887 | ||
5888 | The caches require no explicit maintenance; their accuracy is | |
5889 | maintained internally by the Emacs primitives. Enabling or disabling | |
5890 | the cache should not affect the behavior of any of the motion | |
5891 | functions; it should only affect their performance. */); | |
5892 | ||
4b4deea2 | 5893 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5894 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5895 | |
4b4deea2 | 5896 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5897 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5898 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5899 | set when a file is visited. */); |
be9aafdd | 5900 | |
71ed49fa | 5901 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5902 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 5903 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
5904 | Should be a list of symbols naming formats that are defined in `format-alist'. |
5905 | If it is t, which is the default, auto-save files are written in the | |
5906 | same format as a regular save would use. */); | |
5907 | ||
3cb719bd | 5908 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5909 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5910 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5911 | The default is t, which means that text is invisible |
5912 | if it has a non-nil `invisible' property. | |
5913 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5914 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5915 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5916 | then characters with property value PROP are invisible, | |
5917 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5918 | |
7962a441 | 5919 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5920 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5921 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5922 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5923 | |
5924 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5925 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5926 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5927 | The function `set-window-buffer' updates this variable |
5928 | to the value obtained by calling `current-time'. | |
5929 | If the buffer has never been shown in a window, the value is nil. */); | |
5930 | ||
29208e82 | 5931 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5932 | doc: /* Non-nil if Transient Mark mode is enabled. |
5933 | See the command `transient-mark-mode' for a description of this minor mode. | |
5934 | ||
5935 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5936 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5937 | all windows or just the selected window. | |
5938 | ||
f49d1f52 | 5939 | Lisp programs may give this variable certain special values: |
9d794026 | 5940 | |
f49d1f52 SM |
5941 | - A value of `lambda' enables Transient Mark mode temporarily. |
5942 | It is disabled again after any subsequent action that would | |
5943 | normally deactivate the mark (e.g. buffer modification). | |
5944 | ||
5945 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5946 | temporarily. After any subsequent point motion command that is | |
5947 | not shift-translated, or any other action that would normally | |
5948 | deactivate the mark (e.g. buffer modification), the value of | |
5949 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5950 | Vtransient_mark_mode = Qnil; |
5951 | ||
29208e82 | 5952 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 5953 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5954 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5955 | text properties. If the value is a list, disregard `buffer-read-only' | |
5956 | and disregard a `read-only' text property if the property value | |
5957 | is a member of the list. */); | |
a96b68f1 RS |
5958 | Vinhibit_read_only = Qnil; |
5959 | ||
4b4deea2 | 5960 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5961 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5962 | Values are interpreted as follows: |
5963 | ||
b8dc613f JB |
5964 | t use the cursor specified for the frame |
5965 | nil don't display a cursor | |
5966 | box display a filled box cursor | |
5967 | hollow display a hollow box cursor | |
5968 | bar display a vertical bar cursor with default width | |
5969 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5970 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5971 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5972 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 5973 | |
e08b1705 MR |
5974 | When the buffer is displayed in a non-selected window, the |
5975 | cursor's appearance is instead controlled by the variable | |
5976 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 5977 | |
a3bbced0 | 5978 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 5979 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 5980 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
5981 | The space is measured in pixels, and put below lines on graphic displays, |
5982 | see `display-graphic-p'. | |
60ebfdf3 | 5983 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 5984 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 5985 | |
0124c5bd | 5986 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 5987 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 5988 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
5989 | If nil, only shows a cursor in the selected window. |
5990 | If t, displays a cursor related to the usual cursor type | |
5991 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
5992 | You can also specify the cursor type as in the `cursor-type' variable. | |
5993 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 5994 | |
29208e82 | 5995 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
5996 | doc: /* List of functions called with no args to query before killing a buffer. |
5997 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
5998 | |
5999 | If any of them returns nil, the buffer is not killed. Functions run by | |
6000 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6001 | Vkill_buffer_query_functions = Qnil; |
6002 | ||
29208e82 | 6003 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6004 | doc: /* Normal hook run before changing the major mode of a buffer. |
6005 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6006 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6007 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6008 | |
9397e56f MR |
6009 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6010 | doc: /* Hook run when the buffer list changes. | |
6011 | Functions running this hook are `get-buffer-create', | |
6012 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6013 | and `bury-buffer-internal'. */); |
9397e56f | 6014 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6015 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6016 | |
0dc88e60 | 6017 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6018 | defsubr (&Sbuffer_list); |
6019 | defsubr (&Sget_buffer); | |
6020 | defsubr (&Sget_file_buffer); | |
6021 | defsubr (&Sget_buffer_create); | |
336cd056 | 6022 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6023 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6024 | defsubr (&Sbuffer_name); |
6025 | /*defsubr (&Sbuffer_number);*/ | |
6026 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6027 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6028 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6029 | defsubr (&Sbuffer_local_variables); |
6030 | defsubr (&Sbuffer_modified_p); | |
6031 | defsubr (&Sset_buffer_modified_p); | |
6032 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6033 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6034 | defsubr (&Srename_buffer); |
6035 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6036 | defsubr (&Sbuffer_enable_undo); |
6037 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6038 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6039 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6040 | defsubr (&Scurrent_buffer); |
6041 | defsubr (&Sset_buffer); | |
6042 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6043 | defsubr (&Serase_buffer); |
13cda5f9 | 6044 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6045 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6046 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6047 | |
52f8ec73 | 6048 | defsubr (&Soverlayp); |
2eec3b4e RS |
6049 | defsubr (&Smake_overlay); |
6050 | defsubr (&Sdelete_overlay); | |
6051 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6052 | defsubr (&Soverlay_start); |
6053 | defsubr (&Soverlay_end); | |
6054 | defsubr (&Soverlay_buffer); | |
6055 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6056 | defsubr (&Soverlays_at); |
74514898 | 6057 | defsubr (&Soverlays_in); |
2eec3b4e | 6058 | defsubr (&Snext_overlay_change); |
239c932b | 6059 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6060 | defsubr (&Soverlay_recenter); |
6061 | defsubr (&Soverlay_lists); | |
6062 | defsubr (&Soverlay_get); | |
6063 | defsubr (&Soverlay_put); | |
a8c21b48 | 6064 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6065 | } |
6066 | ||
dfcf069d | 6067 | void |
d3da34e0 | 6068 | keys_of_buffer (void) |
1ab256cb RM |
6069 | { |
6070 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6071 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6072 | |
6073 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6074 | initialized when that function gets called. */ | |
d67b4f80 | 6075 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6076 | } |