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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 | |
f162bcc3 PE |
22 | #define BUFFER_INLINE EXTERN_INLINE |
23 | ||
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
d7306fe6 | 29 | #include <setjmp.h> |
dfcf069d | 30 | #include <unistd.h> |
7ee72033 | 31 | |
d6202519 PE |
32 | #include <verify.h> |
33 | ||
1ab256cb | 34 | #include "lisp.h" |
21cf4cf8 | 35 | #include "intervals.h" |
1ab256cb RM |
36 | #include "window.h" |
37 | #include "commands.h" | |
8f348ed5 | 38 | #include "character.h" |
e5560ff7 | 39 | #include "buffer.h" |
28e969dd | 40 | #include "region-cache.h" |
1ab256cb | 41 | #include "indent.h" |
d014bf88 | 42 | #include "blockinput.h" |
2538fae4 | 43 | #include "keyboard.h" |
e35f6ff7 | 44 | #include "keymap.h" |
08460cd4 | 45 | #include "frame.h" |
1ab256cb RM |
46 | |
47 | struct buffer *current_buffer; /* the current buffer */ | |
48 | ||
49 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 50 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
51 | |
52 | struct buffer *all_buffers; | |
53 | ||
54 | /* This structure holds the default values of the buffer-local variables | |
55 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
56 | The default value occupies the same slot in this structure | |
57 | as an individual buffer's value occupies in that buffer. | |
58 | Setting the default value also goes through the alist of buffers | |
59 | and stores into each buffer that does not say it has a local value. */ | |
60 | ||
e32a5799 | 61 | struct buffer alignas (GCALIGNMENT) buffer_defaults; |
1ab256cb RM |
62 | |
63 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
64 | ||
65 | static Lisp_Object Vbuffer_defaults; | |
66 | ||
67 | /* This structure marks which slots in a buffer have corresponding | |
68 | default values in buffer_defaults. | |
69 | Each such slot has a nonzero value in this structure. | |
70 | The value has only one nonzero bit. | |
71 | ||
72 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
73 | the entry for that slot (found in the same slot in this structure) |
74 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
75 | |
76 | If a slot in this structure is -1, then even though there may | |
77 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
78 | and the corresponding slot in buffer_defaults is not used. | |
79 | ||
1ab256cb RM |
80 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
81 | zero, that is a bug */ | |
82 | ||
83 | struct buffer buffer_local_flags; | |
84 | ||
85 | /* This structure holds the names of symbols whose values may be | |
86 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
87 | ||
e32a5799 | 88 | struct buffer alignas (GCALIGNMENT) buffer_local_symbols; |
6b61353c | 89 | |
1ab256cb RM |
90 | /* A Lisp_Object pointer to the above, used for staticpro */ |
91 | static Lisp_Object Vbuffer_local_symbols; | |
92 | ||
ce5b453a SM |
93 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
94 | the buffer structure. */ | |
95 | ||
96 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
97 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
98 | ||
21514da7 PE |
99 | /* Maximum length of an overlay vector. */ |
100 | #define OVERLAY_COUNT_MAX \ | |
101 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
663e2b3f | 102 | min (PTRDIFF_MAX, SIZE_MAX) / word_size)) |
21514da7 | 103 | |
13de9290 RS |
104 | /* Flags indicating which built-in buffer-local variables |
105 | are permanent locals. */ | |
7313acd0 | 106 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
107 | |
108 | /* Number of per-buffer variables used. */ | |
109 | ||
7313acd0 | 110 | int last_per_buffer_idx; |
13de9290 | 111 | |
f57e2426 J |
112 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
113 | int after, Lisp_Object arg1, | |
114 | Lisp_Object arg2, Lisp_Object arg3); | |
115 | static void swap_out_buffer_local_variables (struct buffer *b); | |
116 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
117 | |
118 | /* Alist of all buffer names vs the buffers. */ | |
119 | /* This used to be a variable, but is no longer, | |
120 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
121 | Lisp_Object Vbuffer_alist; | |
122 | ||
955cbe7b | 123 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 124 | |
43ed3b8d | 125 | /* Hook run before changing a major mode. */ |
955cbe7b | 126 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 127 | |
dbc4e1c1 | 128 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
129 | Lisp_Object Qbefore_change_functions; |
130 | Lisp_Object Qafter_change_functions; | |
1ab256cb | 131 | |
955cbe7b PE |
132 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
133 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 134 | |
955cbe7b | 135 | static Lisp_Object Qprotected_field; |
1ab256cb | 136 | |
955cbe7b | 137 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 138 | |
955cbe7b | 139 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 140 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 141 | |
955cbe7b | 142 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 143 | |
955cbe7b | 144 | static Lisp_Object Qoverlayp; |
52f8ec73 | 145 | |
955cbe7b | 146 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 147 | |
28545e04 | 148 | static Lisp_Object Qevaporate; |
5985d248 | 149 | |
294d215f RS |
150 | Lisp_Object Qmodification_hooks; |
151 | Lisp_Object Qinsert_in_front_hooks; | |
152 | Lisp_Object Qinsert_behind_hooks; | |
153 | ||
fd05c7e9 | 154 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
155 | static void free_buffer_text (struct buffer *b); |
156 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
d311d28c | 157 | static void modify_overlay (struct buffer *, ptrdiff_t, ptrdiff_t); |
8a05d57a | 158 | static Lisp_Object buffer_lisp_local_variables (struct buffer *, int); |
b86af064 | 159 | |
1ab256cb RM |
160 | /* For debugging; temporary. See set_buffer_internal. */ |
161 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
162 | ||
01136e9b | 163 | void |
d3da34e0 | 164 | nsberror (Lisp_Object spec) |
1ab256cb | 165 | { |
a7a60ce9 | 166 | if (STRINGP (spec)) |
d5db4077 | 167 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
168 | error ("Invalid buffer argument"); |
169 | } | |
170 | \f | |
a7ca3326 | 171 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
172 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
173 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 174 | (Lisp_Object object) |
0dc88e60 | 175 | { |
4b4deea2 | 176 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
177 | ? Qt : Qnil); |
178 | } | |
179 | ||
08460cd4 | 180 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 181 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
182 | If the optional arg FRAME is a frame, we return the buffer list in the |
183 | proper order for that frame: the buffers show in FRAME come first, | |
184 | followed by the rest of the buffers. */) | |
5842a27b | 185 | (Lisp_Object frame) |
1ab256cb | 186 | { |
a18b8cb5 | 187 | Lisp_Object general; |
08460cd4 RS |
188 | general = Fmapcar (Qcdr, Vbuffer_alist); |
189 | ||
190 | if (FRAMEP (frame)) | |
191 | { | |
a18b8cb5 KL |
192 | Lisp_Object framelist, prevlist, tail; |
193 | Lisp_Object args[3]; | |
08460cd4 | 194 | |
b7826503 | 195 | CHECK_FRAME (frame); |
e69b0960 | 196 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f | 197 | prevlist = Fnreverse (Fcopy_sequence |
e69b0960 | 198 | (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 199 | |
a18b8cb5 KL |
200 | /* Remove from GENERAL any buffer that duplicates one in |
201 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 202 | tail = framelist; |
a18b8cb5 | 203 | while (CONSP (tail)) |
08460cd4 | 204 | { |
7539e11f KR |
205 | general = Fdelq (XCAR (tail), general); |
206 | tail = XCDR (tail); | |
08460cd4 | 207 | } |
a18b8cb5 KL |
208 | tail = prevlist; |
209 | while (CONSP (tail)) | |
210 | { | |
211 | general = Fdelq (XCAR (tail), general); | |
212 | tail = XCDR (tail); | |
213 | } | |
214 | ||
215 | args[0] = framelist; | |
216 | args[1] = general; | |
217 | args[2] = prevlist; | |
218 | return Fnconc (3, args); | |
08460cd4 | 219 | } |
9397e56f MR |
220 | else |
221 | return general; | |
1ab256cb RM |
222 | } |
223 | ||
04ae1b48 RS |
224 | /* Like Fassoc, but use Fstring_equal to compare |
225 | (which ignores text properties), | |
226 | and don't ever QUIT. */ | |
227 | ||
228 | static Lisp_Object | |
d3da34e0 | 229 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
230 | { |
231 | register Lisp_Object tail; | |
6d70a280 | 232 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
233 | { |
234 | register Lisp_Object elt, tem; | |
6d70a280 | 235 | elt = XCAR (tail); |
04ae1b48 RS |
236 | tem = Fstring_equal (Fcar (elt), key); |
237 | if (!NILP (tem)) | |
238 | return elt; | |
239 | } | |
240 | return Qnil; | |
241 | } | |
242 | ||
a7ca3326 | 243 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
244 | doc: /* Return the buffer named BUFFER-OR-NAME. |
245 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
246 | is a string and there is no buffer with that name, return nil. If | |
247 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 248 | (register Lisp_Object buffer_or_name) |
1ab256cb | 249 | { |
c8804c4f MR |
250 | if (BUFFERP (buffer_or_name)) |
251 | return buffer_or_name; | |
252 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 253 | |
c8804c4f | 254 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
255 | } |
256 | ||
257 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 258 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
259 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
260 | If there is no such live buffer, return nil. | |
7ee72033 | 261 | See also `find-buffer-visiting'. */) |
5842a27b | 262 | (register Lisp_Object filename) |
1ab256cb RM |
263 | { |
264 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
265 | Lisp_Object handler; |
266 | ||
b7826503 | 267 | CHECK_STRING (filename); |
1ab256cb RM |
268 | filename = Fexpand_file_name (filename, Qnil); |
269 | ||
5fe0b67e RS |
270 | /* If the file name has special constructs in it, |
271 | call the corresponding file handler. */ | |
a617e913 | 272 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 273 | if (!NILP (handler)) |
a59225b1 CY |
274 | { |
275 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
276 | filename); | |
277 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
278 | } | |
5fe0b67e | 279 | |
7539e11f | 280 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 281 | { |
7539e11f | 282 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 283 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
284 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
285 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 286 | if (!NILP (tem)) |
1ab256cb RM |
287 | return buf; |
288 | } | |
289 | return Qnil; | |
290 | } | |
291 | ||
52e01189 | 292 | Lisp_Object |
d3da34e0 | 293 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
294 | { |
295 | register Lisp_Object tail, buf, tem; | |
296 | ||
7539e11f | 297 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 298 | { |
7539e11f | 299 | buf = Fcdr (XCAR (tail)); |
52e01189 | 300 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
301 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
302 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
303 | if (!NILP (tem)) |
304 | return buf; | |
305 | } | |
306 | return Qnil; | |
307 | } | |
308 | ||
a7ca3326 | 309 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
310 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
311 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
312 | return that buffer. If no such buffer exists, create a new buffer with | |
313 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
314 | buffer does not keep undo information. | |
315 | ||
316 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
317 | even if it is dead. The return value is never nil. */) | |
5842a27b | 318 | (register Lisp_Object buffer_or_name) |
1ab256cb | 319 | { |
cd265ca6 | 320 | register Lisp_Object buffer, name; |
1ab256cb RM |
321 | register struct buffer *b; |
322 | ||
cd265ca6 MR |
323 | buffer = Fget_buffer (buffer_or_name); |
324 | if (!NILP (buffer)) | |
325 | return buffer; | |
1ab256cb | 326 | |
cd265ca6 | 327 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
328 | error ("Empty string for buffer name is not allowed"); |
329 | ||
cc648cef | 330 | b = allocate_buffer (); |
1ab256cb | 331 | |
336cd056 RS |
332 | /* An ordinary buffer uses its own struct buffer_text. */ |
333 | b->text = &b->own_text; | |
9928463d DA |
334 | b->base_buffer = NULL; |
335 | /* No one shares the text with us now. */ | |
336 | b->indirections = 0; | |
336cd056 | 337 | |
1ab256cb | 338 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 339 | BLOCK_INPUT; |
3b06f880 KH |
340 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
341 | anchoring a search. */ | |
b86af064 | 342 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 343 | UNBLOCK_INPUT; |
1ab256cb | 344 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 345 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 346 | |
cffc6f3b CY |
347 | b->pt = BEG; |
348 | b->begv = BEG; | |
349 | b->zv = BEG; | |
350 | b->pt_byte = BEG_BYTE; | |
351 | b->begv_byte = BEG_BYTE; | |
352 | b->zv_byte = BEG_BYTE; | |
353 | ||
6d70a280 | 354 | BUF_GPT (b) = BEG; |
6d70a280 | 355 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
356 | |
357 | BUF_Z (b) = BEG; | |
6d70a280 | 358 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 359 | BUF_MODIFF (b) = 1; |
3e145152 | 360 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 361 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 | 362 | BUF_SAVE_MODIFF (b) = 1; |
8707c1e5 | 363 | buffer_set_intervals (b, NULL); |
b5a225b4 GM |
364 | BUF_UNCHANGED_MODIFIED (b) = 1; |
365 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
366 | BUF_END_UNCHANGED (b) = 0; | |
367 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 368 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 369 | b->text->inhibit_shrinking = 0; |
1ab256cb | 370 | |
28e969dd JB |
371 | b->newline_cache = 0; |
372 | b->width_run_cache = 0; | |
4c31be61 | 373 | BSET (b, width_table, Qnil); |
b5a225b4 | 374 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 375 | |
1ab256cb | 376 | /* Put this on the chain of all buffers including killed ones. */ |
eab3844f | 377 | b->header.next.buffer = all_buffers; |
1ab256cb RM |
378 | all_buffers = b; |
379 | ||
336cd056 RS |
380 | /* An ordinary buffer normally doesn't need markers |
381 | to handle BEGV and ZV. */ | |
4c31be61 DA |
382 | BSET (b, pt_marker, Qnil); |
383 | BSET (b, begv_marker, Qnil); | |
384 | BSET (b, zv_marker, Qnil); | |
04ae1b48 | 385 | |
cd265ca6 | 386 | name = Fcopy_sequence (buffer_or_name); |
ad8c997f | 387 | string_set_intervals (name, NULL); |
4c31be61 | 388 | BSET (b, name, name); |
04ae1b48 | 389 | |
4c31be61 | 390 | BSET (b, undo_list, (SREF (name, 0) != ' ') ? Qnil : Qt); |
1ab256cb RM |
391 | |
392 | reset_buffer (b); | |
13de9290 | 393 | reset_buffer_local_variables (b, 1); |
1ab256cb | 394 | |
4c31be61 | 395 | BSET (b, mark, Fmake_marker ()); |
65745fad | 396 | BUF_MARKERS (b) = NULL; |
1f57cb74 | 397 | |
1ab256cb | 398 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
399 | XSETBUFFER (buffer, b); |
400 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
401 | /* And run buffer-list-update-hook. */ |
402 | if (!NILP (Vrun_hooks)) | |
403 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 404 | |
cd265ca6 | 405 | return buffer; |
336cd056 RS |
406 | } |
407 | ||
7e9d5818 | 408 | |
04e4cb3a GM |
409 | /* Return a list of overlays which is a copy of the overlay list |
410 | LIST, but for buffer B. */ | |
411 | ||
2410d73a | 412 | static struct Lisp_Overlay * |
d3da34e0 | 413 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 414 | { |
2410d73a | 415 | struct Lisp_Overlay *result = NULL, *tail = NULL; |
04e4cb3a | 416 | |
2410d73a | 417 | for (; list; list = list->next) |
04e4cb3a | 418 | { |
fa691a83 DA |
419 | Lisp_Object overlay, start, end; |
420 | struct Lisp_Marker *m; | |
04e4cb3a | 421 | |
c644523b DA |
422 | eassert (MARKERP (list->start)); |
423 | m = XMARKER (list->start); | |
fa691a83 DA |
424 | start = build_marker (b, m->charpos, m->bytepos); |
425 | XMARKER (start)->insertion_type = m->insertion_type; | |
04e4cb3a | 426 | |
c644523b DA |
427 | eassert (MARKERP (list->end)); |
428 | m = XMARKER (list->end); | |
fa691a83 DA |
429 | end = build_marker (b, m->charpos, m->bytepos); |
430 | XMARKER (end)->insertion_type = m->insertion_type; | |
177c0ea7 | 431 | |
c644523b | 432 | overlay = build_overlay (start, end, Fcopy_sequence (list->plist)); |
2410d73a SM |
433 | if (tail) |
434 | tail = tail->next = XOVERLAY (overlay); | |
435 | else | |
436 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
437 | } |
438 | ||
2410d73a | 439 | return result; |
04e4cb3a | 440 | } |
177c0ea7 | 441 | |
04e4cb3a | 442 | |
7e9d5818 GM |
443 | /* Clone per-buffer values of buffer FROM. |
444 | ||
445 | Buffer TO gets the same per-buffer values as FROM, with the | |
446 | following exceptions: (1) TO's name is left untouched, (2) markers | |
447 | are copied and made to refer to TO, and (3) overlay lists are | |
448 | copied. */ | |
449 | ||
450 | static void | |
d3da34e0 | 451 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 452 | { |
7e9d5818 GM |
453 | int offset; |
454 | ||
52b852c7 | 455 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
7e9d5818 GM |
456 | { |
457 | Lisp_Object obj; | |
458 | ||
4b7cdc0e SM |
459 | /* Don't touch the `name' which should be unique for every buffer. */ |
460 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
461 | continue; | |
462 | ||
7e9d5818 | 463 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 464 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
465 | { |
466 | struct Lisp_Marker *m = XMARKER (obj); | |
657924ff DA |
467 | |
468 | obj = build_marker (to, m->charpos, m->bytepos); | |
7e9d5818 | 469 | XMARKER (obj)->insertion_type = m->insertion_type; |
7e9d5818 GM |
470 | } |
471 | ||
472 | PER_BUFFER_VALUE (to, offset) = obj; | |
473 | } | |
474 | ||
72af86bd | 475 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 476 | |
4cb3e6b3 DA |
477 | buffer_set_overlays |
478 | (to, copy_overlays (to, buffer_get_overlays (from, OV_BEFORE)), OV_BEFORE); | |
479 | buffer_set_overlays | |
480 | (to, copy_overlays (to, buffer_get_overlays (from, OV_AFTER)), OV_AFTER); | |
02f28bbd | 481 | |
e1688f54 RS |
482 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
483 | and install that in TO. */ | |
4c31be61 | 484 | BSET (to, local_var_alist, buffer_lisp_local_variables (from, 1)); |
7e9d5818 GM |
485 | } |
486 | ||
cffc6f3b CY |
487 | |
488 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
489 | current, update these markers. */ | |
490 | ||
491 | static void | |
492 | record_buffer_markers (struct buffer *b) | |
493 | { | |
494 | if (! NILP (BVAR (b, pt_marker))) | |
495 | { | |
496 | Lisp_Object buffer; | |
497 | ||
498 | eassert (!NILP (BVAR (b, begv_marker))); | |
499 | eassert (!NILP (BVAR (b, zv_marker))); | |
500 | ||
501 | XSETBUFFER (buffer, b); | |
502 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
503 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
504 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
505 | } | |
506 | } | |
507 | ||
508 | ||
509 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
510 | current, fetch these values into B->begv etc. */ | |
511 | ||
512 | static void | |
513 | fetch_buffer_markers (struct buffer *b) | |
514 | { | |
515 | if (! NILP (BVAR (b, pt_marker))) | |
516 | { | |
517 | Lisp_Object m; | |
518 | ||
519 | eassert (!NILP (BVAR (b, begv_marker))); | |
520 | eassert (!NILP (BVAR (b, zv_marker))); | |
521 | ||
522 | m = BVAR (b, pt_marker); | |
523 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
524 | ||
525 | m = BVAR (b, begv_marker); | |
526 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
527 | ||
528 | m = BVAR (b, zv_marker); | |
529 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
530 | } | |
531 | } | |
532 | ||
533 | ||
7e9d5818 GM |
534 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
535 | 2, 3, | |
193c3837 | 536 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 537 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 538 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
539 | NAME should be a string which is not the name of an existing buffer. |
540 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
541 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 542 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 543 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 544 | { |
6b61353c | 545 | Lisp_Object buf, tem; |
7e9d5818 | 546 | struct buffer *b; |
336cd056 | 547 | |
6b61353c | 548 | CHECK_STRING (name); |
336cd056 RS |
549 | buf = Fget_buffer (name); |
550 | if (!NILP (buf)) | |
d5db4077 | 551 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 552 | |
6b61353c | 553 | tem = base_buffer; |
336cd056 RS |
554 | base_buffer = Fget_buffer (base_buffer); |
555 | if (NILP (base_buffer)) | |
6b61353c | 556 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 557 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 558 | error ("Base buffer has been killed"); |
336cd056 | 559 | |
d5db4077 | 560 | if (SCHARS (name) == 0) |
336cd056 RS |
561 | error ("Empty string for buffer name is not allowed"); |
562 | ||
cc648cef | 563 | b = allocate_buffer (); |
336cd056 | 564 | |
9928463d DA |
565 | /* No double indirection - if base buffer is indirect, |
566 | new buffer becomes an indirect to base's base. */ | |
67ee9f6e SM |
567 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
568 | ? XBUFFER (base_buffer)->base_buffer | |
569 | : XBUFFER (base_buffer)); | |
336cd056 RS |
570 | |
571 | /* Use the base buffer's text object. */ | |
572 | b->text = b->base_buffer->text; | |
9928463d DA |
573 | /* We have no own text. */ |
574 | b->indirections = -1; | |
575 | /* Notify base buffer that we share the text now. */ | |
576 | b->base_buffer->indirections++; | |
336cd056 | 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; | |
4c31be61 | 587 | BSET (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); | |
ad8c997f | 594 | string_set_intervals (name, NULL); |
4c31be61 | 595 | BSET (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 | ||
4c31be61 | 604 | BSET (b, mark, Fmake_marker ()); |
336cd056 | 605 | |
abc9d959 | 606 | /* The multibyte status belongs to the base buffer. */ |
4c31be61 | 607 | BSET (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 | |
4c31be61 DA |
615 | BSET (b->base_buffer, pt_marker, |
616 | build_marker (b->base_buffer, b->base_buffer->pt, b->base_buffer->pt_byte)); | |
657924ff | 617 | |
4c31be61 DA |
618 | BSET (b->base_buffer, begv_marker, |
619 | build_marker (b->base_buffer, b->base_buffer->begv, b->base_buffer->begv_byte)); | |
cffc6f3b | 620 | |
4c31be61 DA |
621 | BSET (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. */ | |
4c31be61 DA |
630 | BSET (b, pt_marker, build_marker (b, b->pt, b->pt_byte)); |
631 | BSET (b, begv_marker, build_marker (b, b->begv, b->begv_byte)); | |
632 | BSET (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); | |
4c31be61 DA |
640 | BSET (b, filename, Qnil); |
641 | BSET (b, file_truename, Qnil); | |
642 | BSET (b, display_count, make_number (0)); | |
643 | BSET (b, backed_up, Qnil); | |
644 | BSET (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 | { | |
c644523b DA |
664 | eassert (b == XBUFFER (Fmarker_buffer (ov->start))); |
665 | modify_overlay (b, marker_position (ov->start), | |
666 | marker_position (ov->end)); | |
667 | Fset_marker (ov->start, Qnil, Qnil); | |
668 | Fset_marker (ov->end, Qnil, Qnil); | |
041a49a6 DA |
669 | |
670 | } | |
671 | ||
672 | /* Delete all overlays of B and reset it's overlay lists. */ | |
673 | ||
d4f5719a | 674 | void |
d3da34e0 | 675 | delete_all_overlays (struct buffer *b) |
d4f5719a | 676 | { |
041a49a6 | 677 | struct Lisp_Overlay *ov, *next; |
d4f5719a | 678 | |
4cb3e6b3 | 679 | for (ov = buffer_get_overlays (b, OV_BEFORE); ov; ov = next) |
d4f5719a | 680 | { |
041a49a6 DA |
681 | drop_overlay (b, ov); |
682 | next = ov->next; | |
683 | ov->next = NULL; | |
d4f5719a | 684 | } |
041a49a6 | 685 | |
4cb3e6b3 | 686 | for (ov = buffer_get_overlays (b, OV_AFTER); ov; ov = next) |
d4f5719a | 687 | { |
041a49a6 DA |
688 | drop_overlay (b, ov); |
689 | next = ov->next; | |
690 | ov->next = NULL; | |
d4f5719a | 691 | } |
041a49a6 | 692 | |
4cb3e6b3 DA |
693 | buffer_set_overlays (b, NULL, OV_BEFORE); |
694 | buffer_set_overlays (b, NULL, OV_AFTER); | |
d4f5719a SM |
695 | } |
696 | ||
bcd40520 | 697 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 698 | and local variables. |
d4f5719a SM |
699 | If called on an already-initialized buffer, the list of overlays |
700 | should be deleted before calling this function, otherwise we end up | |
701 | with overlays that claim to belong to the buffer but the buffer | |
702 | claims it doesn't belong to it. */ | |
1ab256cb RM |
703 | |
704 | void | |
d3da34e0 | 705 | reset_buffer (register struct buffer *b) |
1ab256cb | 706 | { |
4c31be61 DA |
707 | BSET (b, filename, Qnil); |
708 | BSET (b, file_truename, Qnil); | |
709 | BSET (b, directory, | |
710 | (current_buffer) ? BVAR (current_buffer, directory) : Qnil); | |
e9a9ae03 | 711 | b->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 712 | b->modtime_size = -1; |
4b4deea2 | 713 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 714 | b->last_window_start = 1; |
8b264726 | 715 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
716 | b->clip_changed = 0; |
717 | b->prevent_redisplay_optimizations_p = 1; | |
4c31be61 | 718 | BSET (b, backed_up, Qnil); |
0b5397c2 | 719 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 720 | b->auto_save_failure_time = 0; |
4c31be61 DA |
721 | BSET (b, auto_save_file_name, Qnil); |
722 | BSET (b, read_only, Qnil); | |
4cb3e6b3 DA |
723 | buffer_set_overlays (b, NULL, OV_BEFORE); |
724 | buffer_set_overlays (b, NULL, OV_AFTER); | |
c2d5b10f | 725 | b->overlay_center = BEG; |
4c31be61 DA |
726 | BSET (b, mark_active, Qnil); |
727 | BSET (b, point_before_scroll, Qnil); | |
728 | BSET (b, file_format, Qnil); | |
729 | BSET (b, auto_save_file_format, Qt); | |
730 | BSET (b, last_selected_window, Qnil); | |
731 | BSET (b, display_count, make_number (0)); | |
732 | BSET (b, display_time, Qnil); | |
733 | BSET (b, enable_multibyte_characters, | |
734 | BVAR (&buffer_defaults, enable_multibyte_characters)); | |
735 | BSET (b, cursor_type, BVAR (&buffer_defaults, cursor_type)); | |
736 | BSET (b, extra_line_spacing, BVAR (&buffer_defaults, extra_line_spacing)); | |
0522997d RS |
737 | |
738 | b->display_error_modiff = 0; | |
1ab256cb RM |
739 | } |
740 | ||
bcd40520 RS |
741 | /* Reset buffer B's local variables info. |
742 | Don't use this on a buffer that has already been in use; | |
743 | it does not treat permanent locals consistently. | |
13de9290 RS |
744 | Instead, use Fkill_all_local_variables. |
745 | ||
3709505e | 746 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
747 | buffer-local variables. If PERMANENT_TOO is 0, |
748 | we preserve those. */ | |
bcd40520 | 749 | |
13de9290 | 750 | static void |
d3da34e0 | 751 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
752 | { |
753 | register int offset; | |
7c02e886 | 754 | int i; |
1ab256cb RM |
755 | |
756 | /* Reset the major mode to Fundamental, together with all the | |
757 | things that depend on the major mode. | |
758 | default-major-mode is handled at a higher level. | |
759 | We ignore it here. */ | |
4c31be61 DA |
760 | BSET (b, major_mode, Qfundamental_mode); |
761 | BSET (b, keymap, Qnil); | |
762 | BSET (b, mode_name, QSFundamental); | |
763 | BSET (b, minor_modes, Qnil); | |
3446af9c RS |
764 | |
765 | /* If the standard case table has been altered and invalidated, | |
766 | fix up its insides first. */ | |
767 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
768 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
769 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
770 | Fset_standard_case_table (Vascii_downcase_table); | |
771 | ||
4c31be61 DA |
772 | BSET (b, downcase_table, Vascii_downcase_table); |
773 | BSET (b, upcase_table, XCHAR_TABLE (Vascii_downcase_table)->extras[0]); | |
774 | BSET (b, case_canon_table, XCHAR_TABLE (Vascii_downcase_table)->extras[1]); | |
775 | BSET (b, case_eqv_table, XCHAR_TABLE (Vascii_downcase_table)->extras[2]); | |
776 | BSET (b, invisibility_spec, Qt); | |
3cb719bd | 777 | |
13de9290 | 778 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 779 | if (permanent_too) |
4c31be61 | 780 | BSET (b, local_var_alist, Qnil); |
3709505e SM |
781 | else |
782 | { | |
2f7a359d | 783 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 784 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 785 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
786 | { |
787 | /* If permanent-local, keep it. */ | |
788 | last = tmp; | |
789 | if (EQ (prop, Qpermanent_local_hook)) | |
790 | { | |
791 | /* This is a partially permanent hook variable. | |
792 | Preserve only the elements that want to be preserved. */ | |
793 | Lisp_Object list, newlist; | |
794 | list = XCDR (XCAR (tmp)); | |
795 | if (!CONSP (list)) | |
796 | newlist = list; | |
797 | else | |
798 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
799 | { | |
800 | Lisp_Object elt = XCAR (list); | |
801 | /* Preserve element ELT if it's t, | |
802 | if it is a function with a `permanent-local-hook' property, | |
803 | or if it's not a symbol. */ | |
804 | if (! SYMBOLP (elt) | |
805 | || EQ (elt, Qt) | |
806 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
807 | newlist = Fcons (elt, newlist); | |
808 | } | |
809 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
810 | } | |
811 | } | |
812 | /* Delete this local variable. */ | |
3709505e | 813 | else if (NILP (last)) |
4c31be61 | 814 | BSET (b, local_var_alist, XCDR (tmp)); |
3709505e SM |
815 | else |
816 | XSETCDR (last, XCDR (tmp)); | |
817 | } | |
818 | ||
7313acd0 | 819 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 820 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 821 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 822 | |
36429c89 | 823 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 824 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 825 | { |
7313acd0 | 826 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
827 | if ((idx > 0 |
828 | && (permanent_too | |
ce5b453a | 829 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 830 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 831 | } |
1ab256cb RM |
832 | } |
833 | ||
01050cb5 RM |
834 | /* We split this away from generate-new-buffer, because rename-buffer |
835 | and set-visited-file-name ought to be able to use this to really | |
836 | rename the buffer properly. */ | |
837 | ||
a7ca3326 | 838 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 839 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 840 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
841 | If there is no live buffer named NAME, then return NAME. |
842 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 843 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 844 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
845 | it is in the sequence to be tried) even if a buffer with that name exists. |
846 | ||
847 | If NAME begins with a space (i.e., a buffer that is not normally | |
848 | visible to users), then if buffer NAME already exists a random number | |
849 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 850 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 851 | { |
8e4fd1e1 | 852 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
853 | ptrdiff_t count; |
854 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 855 | |
b7826503 | 856 | CHECK_STRING (name); |
1ab256cb | 857 | |
6b61353c KH |
858 | tem = Fstring_equal (name, ignore); |
859 | if (!NILP (tem)) | |
860 | return name; | |
1ab256cb | 861 | tem = Fget_buffer (name); |
265a9e55 | 862 | if (NILP (tem)) |
01050cb5 | 863 | return name; |
1ab256cb | 864 | |
8e4fd1e1 GM |
865 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
866 | { | |
867 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 868 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 869 | (number, "-%"pI"d", |
a8290ec3 | 870 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
871 | tem = Fget_buffer (tem2); |
872 | if (NILP (tem)) | |
873 | return tem2; | |
874 | } | |
875 | else | |
876 | tem2 = name; | |
877 | ||
1ab256cb RM |
878 | count = 1; |
879 | while (1) | |
880 | { | |
a8290ec3 DA |
881 | gentemp = concat2 (tem2, make_formatted_string |
882 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 883 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
884 | if (!NILP (tem)) |
885 | return gentemp; | |
1ab256cb | 886 | tem = Fget_buffer (gentemp); |
265a9e55 | 887 | if (NILP (tem)) |
01050cb5 | 888 | return gentemp; |
1ab256cb RM |
889 | } |
890 | } | |
891 | ||
892 | \f | |
a7ca3326 | 893 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 894 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
895 | BUFFER defaults to the current buffer. |
896 | Return nil if BUFFER has been killed. */) | |
5842a27b | 897 | (register Lisp_Object buffer) |
1ab256cb | 898 | { |
265a9e55 | 899 | if (NILP (buffer)) |
4b4deea2 | 900 | return BVAR (current_buffer, name); |
b7826503 | 901 | CHECK_BUFFER (buffer); |
4b4deea2 | 902 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
903 | } |
904 | ||
a7ca3326 | 905 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
906 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
907 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 908 | (register Lisp_Object buffer) |
1ab256cb | 909 | { |
265a9e55 | 910 | if (NILP (buffer)) |
4b4deea2 | 911 | return BVAR (current_buffer, filename); |
b7826503 | 912 | CHECK_BUFFER (buffer); |
4b4deea2 | 913 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
914 | } |
915 | ||
336cd056 RS |
916 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
917 | 0, 1, 0, | |
7ee72033 | 918 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
919 | If BUFFER is not indirect, return nil. |
920 | BUFFER defaults to the current buffer. */) | |
5842a27b | 921 | (register Lisp_Object buffer) |
336cd056 RS |
922 | { |
923 | struct buffer *base; | |
924 | Lisp_Object base_buffer; | |
925 | ||
926 | if (NILP (buffer)) | |
927 | base = current_buffer->base_buffer; | |
928 | else | |
929 | { | |
b7826503 | 930 | CHECK_BUFFER (buffer); |
336cd056 RS |
931 | base = XBUFFER (buffer)->base_buffer; |
932 | } | |
933 | ||
934 | if (! base) | |
935 | return Qnil; | |
936 | XSETBUFFER (base_buffer, base); | |
937 | return base_buffer; | |
938 | } | |
939 | ||
a7ca3326 | 940 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 941 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
942 | doc: /* Return the value of VARIABLE in BUFFER. |
943 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 944 | is the default binding of the variable. */) |
5842a27b | 945 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
946 | { |
947 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
948 | ||
949 | if (EQ (result, Qunbound)) | |
950 | xsignal1 (Qvoid_variable, variable); | |
951 | ||
952 | return result; | |
953 | } | |
954 | ||
955 | ||
956 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
957 | locally unbound. */ | |
958 | ||
959 | Lisp_Object | |
960 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
961 | { |
962 | register struct buffer *buf; | |
963 | register Lisp_Object result; | |
ad97b375 | 964 | struct Lisp_Symbol *sym; |
79aa712d | 965 | |
5e2ad10b | 966 | CHECK_SYMBOL (variable); |
ae69175b | 967 | CHECK_BUFFER (buffer); |
79aa712d | 968 | buf = XBUFFER (buffer); |
ce5b453a | 969 | sym = XSYMBOL (variable); |
79aa712d | 970 | |
ce5b453a SM |
971 | start: |
972 | switch (sym->redirect) | |
f0bac7de | 973 | { |
ce5b453a SM |
974 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
975 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
976 | case SYMBOL_LOCALIZED: | |
977 | { /* Look in local_var_alist. */ | |
978 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
979 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 980 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
981 | if (!NILP (result)) |
982 | { | |
983 | if (blv->fwd) | |
984 | { /* What binding is loaded right now? */ | |
985 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 986 | |
ce5b453a SM |
987 | /* The value of the currently loaded binding is not |
988 | stored in it, but rather in the realvalue slot. | |
989 | Store that value into the binding it belongs to | |
990 | in case that is the one we are about to use. */ | |
f0bac7de | 991 | |
ce5b453a SM |
992 | XSETCDR (current_alist_element, |
993 | do_symval_forwarding (blv->fwd)); | |
994 | } | |
995 | /* Now get the (perhaps updated) value out of the binding. */ | |
996 | result = XCDR (result); | |
997 | } | |
998 | else | |
999 | result = Fdefault_value (variable); | |
1000 | break; | |
1001 | } | |
1002 | case SYMBOL_FORWARDED: | |
1003 | { | |
1004 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1005 | if (BUFFER_OBJFWDP (fwd)) | |
1006 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
1007 | else | |
1008 | result = Fdefault_value (variable); | |
1009 | break; | |
1010 | } | |
1011 | default: abort (); | |
f0bac7de | 1012 | } |
79aa712d | 1013 | |
5f2c76c6 | 1014 | return result; |
79aa712d RS |
1015 | } |
1016 | ||
e1688f54 | 1017 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1018 | buffer BUF. That is, don't include the variables maintained |
8a05d57a AS |
1019 | in special slots in the buffer object. |
1020 | If CLONE is zero elements of the form (VAR . unbound) are replaced | |
1021 | by VAR. */ | |
e1688f54 RS |
1022 | |
1023 | static Lisp_Object | |
8a05d57a | 1024 | buffer_lisp_local_variables (struct buffer *buf, int clone) |
e1688f54 RS |
1025 | { |
1026 | Lisp_Object result = Qnil; | |
1027 | register Lisp_Object tail; | |
4b4deea2 | 1028 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1029 | { |
1030 | Lisp_Object val, elt; | |
1031 | ||
1032 | elt = XCAR (tail); | |
1033 | ||
1034 | /* Reference each variable in the alist in buf. | |
1035 | If inquiring about the current buffer, this gets the current values, | |
1036 | so store them into the alist so the alist is up to date. | |
1037 | If inquiring about some other buffer, this swaps out any values | |
1038 | for that buffer, making the alist up to date automatically. */ | |
1039 | val = find_symbol_value (XCAR (elt)); | |
1040 | /* Use the current buffer value only if buf is the current buffer. */ | |
1041 | if (buf != current_buffer) | |
1042 | val = XCDR (elt); | |
1043 | ||
8a05d57a | 1044 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1045 | ? XCAR (elt) |
1046 | : Fcons (XCAR (elt), val), | |
1047 | result); | |
e1688f54 RS |
1048 | } |
1049 | ||
1050 | return result; | |
1051 | } | |
1052 | ||
1ab256cb | 1053 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1054 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1055 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1056 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1057 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1058 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1059 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1060 | (register Lisp_Object buffer) |
1ab256cb RM |
1061 | { |
1062 | register struct buffer *buf; | |
553defa4 | 1063 | register Lisp_Object result; |
1ab256cb | 1064 | |
265a9e55 | 1065 | if (NILP (buffer)) |
1ab256cb RM |
1066 | buf = current_buffer; |
1067 | else | |
1068 | { | |
b7826503 | 1069 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1070 | buf = XBUFFER (buffer); |
1071 | } | |
1072 | ||
8a05d57a | 1073 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1074 | |
1ab256cb RM |
1075 | /* Add on all the variables stored in special slots. */ |
1076 | { | |
7c02e886 | 1077 | int offset, idx; |
1ab256cb | 1078 | |
52b852c7 | 1079 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1080 | { |
7313acd0 GM |
1081 | idx = PER_BUFFER_IDX (offset); |
1082 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1083 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1084 | { |
1085 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1086 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1087 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1088 | result); | |
1089 | } | |
1ab256cb RM |
1090 | } |
1091 | } | |
553defa4 RS |
1092 | |
1093 | return result; | |
1ab256cb | 1094 | } |
1ab256cb | 1095 | \f |
a7ca3326 | 1096 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1097 | 0, 1, 0, |
7ee72033 MB |
1098 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1099 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1100 | (register Lisp_Object buffer) |
1ab256cb RM |
1101 | { |
1102 | register struct buffer *buf; | |
265a9e55 | 1103 | if (NILP (buffer)) |
1ab256cb RM |
1104 | buf = current_buffer; |
1105 | else | |
1106 | { | |
b7826503 | 1107 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1108 | buf = XBUFFER (buffer); |
1109 | } | |
1110 | ||
336cd056 | 1111 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1112 | } |
1113 | ||
a7ca3326 | 1114 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1115 | 1, 1, 0, |
7ee72033 MB |
1116 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1117 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1118 | (register Lisp_Object flag) |
1ab256cb RM |
1119 | { |
1120 | register int already; | |
1121 | register Lisp_Object fn; | |
8ec01c70 | 1122 | Lisp_Object buffer, window; |
1ab256cb RM |
1123 | |
1124 | #ifdef CLASH_DETECTION | |
1125 | /* If buffer becoming modified, lock the file. | |
1126 | If buffer becoming unmodified, unlock the file. */ | |
1127 | ||
4b4deea2 | 1128 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1129 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1130 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1131 | { |
336cd056 | 1132 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1133 | if (!already && !NILP (flag)) |
1ab256cb | 1134 | lock_file (fn); |
265a9e55 | 1135 | else if (already && NILP (flag)) |
1ab256cb RM |
1136 | unlock_file (fn); |
1137 | } | |
1138 | #endif /* CLASH_DETECTION */ | |
1139 | ||
0b5397c2 SM |
1140 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1141 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1142 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1143 | modify SAVE_MODIFF to affect one, we may affect the other | |
1144 | as well. | |
1145 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1146 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1147 | recent-auto-save-p from t to nil. | |
1148 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1149 | we risk changing recent-auto-save-p from nil to t. */ | |
1150 | SAVE_MODIFF = (NILP (flag) | |
1151 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1152 | ? MODIFF | |
1153 | /* Let's try to preserve recent-auto-save-p. */ | |
1154 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1155 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1156 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1157 | or increase MODIFF. */ | |
1158 | : MODIFF++); | |
177c0ea7 | 1159 | |
8ec01c70 GM |
1160 | /* Set update_mode_lines only if buffer is displayed in some window. |
1161 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1162 | state by recording/restoring the state around blocks of code. | |
1163 | Setting update_mode_lines makes redisplay consider all windows | |
1164 | (on all frames). Stealth fontification of buffers not displayed | |
1165 | would incur additional redisplay costs if we'd set | |
1166 | update_modes_lines unconditionally. | |
1167 | ||
1168 | Ideally, I think there should be another mechanism for fontifying | |
1169 | buffers without "modifying" buffers, or redisplay should be | |
1170 | smarter about updating the `*' in mode lines. --gerd */ | |
1171 | XSETBUFFER (buffer, current_buffer); | |
1172 | window = Fget_buffer_window (buffer, Qt); | |
1173 | if (WINDOWP (window)) | |
d57b83b3 GM |
1174 | { |
1175 | ++update_mode_lines; | |
1176 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1177 | } | |
177c0ea7 | 1178 | |
1ab256cb RM |
1179 | return flag; |
1180 | } | |
1181 | ||
a8c21b48 GM |
1182 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1183 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1184 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1185 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1186 | state of the current buffer. Use with care. */) |
5842a27b | 1187 | (Lisp_Object flag) |
a8c21b48 GM |
1188 | { |
1189 | #ifdef CLASH_DETECTION | |
1190 | Lisp_Object fn; | |
177c0ea7 | 1191 | |
a8c21b48 GM |
1192 | /* If buffer becoming modified, lock the file. |
1193 | If buffer becoming unmodified, unlock the file. */ | |
1194 | ||
4b4deea2 | 1195 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1196 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1197 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1198 | { |
1199 | int already = SAVE_MODIFF < MODIFF; | |
1200 | if (!already && !NILP (flag)) | |
1201 | lock_file (fn); | |
1202 | else if (already && NILP (flag)) | |
1203 | unlock_file (fn); | |
1204 | } | |
1205 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1206 | |
a8c21b48 GM |
1207 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1208 | return flag; | |
1209 | } | |
1210 | ||
1ab256cb | 1211 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1212 | 0, 1, 0, |
7ee72033 | 1213 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1214 | Each buffer has a tick counter which is incremented each time the |
1215 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1216 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1217 | (register Lisp_Object buffer) |
1ab256cb RM |
1218 | { |
1219 | register struct buffer *buf; | |
265a9e55 | 1220 | if (NILP (buffer)) |
1ab256cb RM |
1221 | buf = current_buffer; |
1222 | else | |
1223 | { | |
b7826503 | 1224 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1225 | buf = XBUFFER (buffer); |
1226 | } | |
1227 | ||
1228 | return make_number (BUF_MODIFF (buf)); | |
1229 | } | |
3e145152 CY |
1230 | |
1231 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1232 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1233 | doc: /* Return BUFFER's character-change tick counter. | |
1234 | Each buffer has a character-change tick counter, which is set to the | |
1235 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1236 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1237 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1238 | you can tell whether a character change occurred in that buffer in |
1239 | between these calls. No argument or nil as argument means use current | |
1240 | buffer as BUFFER. */) | |
5842a27b | 1241 | (register Lisp_Object buffer) |
3e145152 CY |
1242 | { |
1243 | register struct buffer *buf; | |
1244 | if (NILP (buffer)) | |
1245 | buf = current_buffer; | |
1246 | else | |
1247 | { | |
1248 | CHECK_BUFFER (buffer); | |
1249 | buf = XBUFFER (buffer); | |
1250 | } | |
1251 | ||
1252 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1253 | } | |
1ab256cb | 1254 | \f |
01050cb5 | 1255 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1256 | "(list (read-string \"Rename buffer (to new name): \" \ |
1257 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1258 | current-prefix-arg)", | |
7ee72033 | 1259 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1260 | If second arg UNIQUE is nil or omitted, it is an error if a |
1261 | buffer named NEWNAME already exists. | |
1262 | If UNIQUE is non-nil, come up with a new name using | |
1263 | `generate-new-buffer-name'. | |
1264 | Interactively, you can set UNIQUE with a prefix argument. | |
1265 | We return the name we actually gave the buffer. | |
7ee72033 | 1266 | This does not change the name of the visited file (if any). */) |
5842a27b | 1267 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1268 | { |
1269 | register Lisp_Object tem, buf; | |
1270 | ||
b7826503 | 1271 | CHECK_STRING (newname); |
d59698c4 | 1272 | |
d5db4077 | 1273 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1274 | error ("Empty string is invalid as a buffer name"); |
1275 | ||
489c043a | 1276 | tem = Fget_buffer (newname); |
265a9e55 | 1277 | if (!NILP (tem)) |
01050cb5 | 1278 | { |
8801a864 KR |
1279 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1280 | rename the buffer automatically so you can create another | |
1281 | with the original name. It makes UNIQUE equivalent to | |
1282 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1283 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1284 | return BVAR (current_buffer, name); |
3bd779aa | 1285 | if (!NILP (unique)) |
4b4deea2 | 1286 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1287 | else |
d5db4077 | 1288 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1289 | } |
1ab256cb | 1290 | |
4c31be61 | 1291 | BSET (current_buffer, name, newname); |
76f590d7 JB |
1292 | |
1293 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1294 | any windows displaying current_buffer will stay unchanged. */ | |
1295 | update_mode_lines++; | |
1296 | ||
67180c6a | 1297 | XSETBUFFER (buf, current_buffer); |
489c043a | 1298 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1299 | if (NILP (BVAR (current_buffer, filename)) |
1300 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1301 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1302 | |
1303 | /* Run buffer-list-update-hook. */ | |
1304 | if (!NILP (Vrun_hooks)) | |
1305 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1306 | ||
fb5eba9c | 1307 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1308 | return BVAR (current_buffer, name); |
1ab256cb RM |
1309 | } |
1310 | ||
a7ca3326 | 1311 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1312 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1313 | Buffers not visible in windows are preferred to visible buffers, unless |
1314 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1315 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1316 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1317 | frame's buffer list. | |
1318 | ||
1319 | The buffer is found by scanning the selected or specified frame's buffer | |
1320 | list first, followed by the list of all buffers. If no other buffer | |
1321 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1322 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1323 | { |
9397e56f MR |
1324 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1325 | Lisp_Object tail, buf, pred; | |
1326 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1327 | |
773fbdb9 | 1328 | if (NILP (frame)) |
9ba9623d | 1329 | frame = selected_frame; |
773fbdb9 | 1330 | |
d234d13e JL |
1331 | CHECK_FRAME (frame); |
1332 | ||
773fbdb9 | 1333 | pred = frame_buffer_predicate (frame); |
9397e56f | 1334 | /* Consider buffers that have been seen in the frame first. */ |
e69b0960 | 1335 | tail = XFRAME (frame)->buffer_list; |
9397e56f | 1336 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1337 | { |
9397e56f MR |
1338 | buf = XCAR (tail); |
1339 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1340 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1341 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1342 | /* If the frame has a buffer_predicate, disregard buffers that | |
1343 | don't fit the predicate. */ | |
1344 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1345 | { | |
1346 | if (!NILP (visible_ok) | |
1347 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1348 | return buf; | |
1349 | else if (NILP (notsogood)) | |
1350 | notsogood = buf; | |
1351 | } | |
7962a441 | 1352 | } |
7962a441 | 1353 | |
9397e56f MR |
1354 | /* Consider alist of all buffers next. */ |
1355 | tail = Vbuffer_alist; | |
6d70a280 | 1356 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1357 | { |
6d70a280 | 1358 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1359 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1360 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1361 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1362 | /* If the frame has a buffer_predicate, disregard buffers that | |
1363 | don't fit the predicate. */ | |
1364 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1365 | { | |
1366 | if (!NILP (visible_ok) | |
1367 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1368 | return buf; | |
1369 | else if (NILP (notsogood)) | |
1370 | notsogood = buf; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | if (!NILP (notsogood)) | |
1375 | return notsogood; | |
1376 | else | |
1377 | { | |
1378 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1379 | if (NILP (buf)) |
04ae1b48 | 1380 | { |
9397e56f MR |
1381 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1382 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1383 | } |
9397e56f MR |
1384 | return buf; |
1385 | } | |
1386 | } | |
04ae1b48 | 1387 | |
9397e56f MR |
1388 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1389 | pay attention to any frame-local buffer lists, doesn't care about | |
1390 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1391 | ||
1392 | Lisp_Object | |
1393 | other_buffer_safely (Lisp_Object buffer) | |
1394 | { | |
1395 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1396 | Lisp_Object tail, buf; | |
1397 | ||
1398 | tail = Vbuffer_alist; | |
1399 | for (; CONSP (tail); tail = XCDR (tail)) | |
1400 | { | |
1401 | buf = Fcdr (XCAR (tail)); | |
1402 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1403 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1404 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1405 | return buf; |
1ab256cb | 1406 | } |
9397e56f | 1407 | |
dba1a30a GM |
1408 | buf = Fget_buffer (build_string ("*scratch*")); |
1409 | if (NILP (buf)) | |
1410 | { | |
1411 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1412 | Fset_buffer_major_mode (buf); | |
1413 | } | |
9397e56f | 1414 | |
89132f25 | 1415 | return buf; |
1ab256cb RM |
1416 | } |
1417 | \f | |
a7ca3326 | 1418 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1419 | 0, 1, "", |
7ee72033 MB |
1420 | doc: /* Start keeping undo information for buffer BUFFER. |
1421 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1422 | (register Lisp_Object buffer) |
1ab256cb | 1423 | { |
ffd56f97 | 1424 | Lisp_Object real_buffer; |
1ab256cb | 1425 | |
ffd56f97 | 1426 | if (NILP (buffer)) |
67180c6a | 1427 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1428 | else |
1429 | { | |
ffd56f97 JB |
1430 | real_buffer = Fget_buffer (buffer); |
1431 | if (NILP (real_buffer)) | |
1432 | nsberror (buffer); | |
1ab256cb RM |
1433 | } |
1434 | ||
4b4deea2 | 1435 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
4c31be61 | 1436 | BSET (XBUFFER (real_buffer), undo_list, Qnil); |
1ab256cb RM |
1437 | |
1438 | return Qnil; | |
1439 | } | |
1440 | ||
9cd47b72 DA |
1441 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1442 | ||
1443 | int | |
1444 | compact_buffer (struct buffer *buffer) | |
1445 | { | |
9928463d DA |
1446 | /* Verify indirection counters. */ |
1447 | if (buffer->base_buffer) | |
1448 | { | |
1449 | eassert (buffer->indirections == -1); | |
1450 | eassert (buffer->base_buffer->indirections > 0); | |
1451 | } | |
1452 | else | |
1453 | eassert (buffer->indirections >= 0); | |
1454 | ||
9cd47b72 DA |
1455 | /* Skip dead buffers, indirect buffers and buffers |
1456 | which aren't changed since last compaction. */ | |
e34f7f79 | 1457 | if (!NILP (buffer->INTERNAL_FIELD (name)) |
9cd47b72 DA |
1458 | && (buffer->base_buffer == NULL) |
1459 | && (buffer->text->compact != buffer->text->modiff)) | |
1460 | { | |
1461 | /* If a buffer's undo list is Qt, that means that undo is | |
1462 | turned off in that buffer. Calling truncate_undo_list on | |
1463 | Qt tends to return NULL, which effectively turns undo back on. | |
1464 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1465 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1466 | truncate_undo_list (buffer); |
1467 | ||
1468 | /* Shrink buffer gaps. */ | |
1469 | if (!buffer->text->inhibit_shrinking) | |
1470 | { | |
1471 | /* If a buffer's gap size is more than 10% of the buffer | |
1472 | size, or larger than 2000 bytes, then shrink it | |
1473 | accordingly. Keep a minimum size of 20 bytes. */ | |
1474 | int size = min (2000, max (20, (buffer->text->z_byte / 10))); | |
1475 | ||
1476 | if (buffer->text->gap_size > size) | |
1477 | { | |
1478 | struct buffer *save_current = current_buffer; | |
1479 | current_buffer = buffer; | |
1480 | make_gap (-(buffer->text->gap_size - size)); | |
1481 | current_buffer = save_current; | |
1482 | } | |
1483 | } | |
1484 | buffer->text->compact = buffer->text->modiff; | |
1485 | return 1; | |
1486 | } | |
1487 | return 0; | |
1488 | } | |
1489 | ||
a7ca3326 | 1490 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1491 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1492 | The argument may be a buffer or the name of an existing buffer. |
1493 | Argument nil or omitted means kill the current buffer. Return t if the | |
1494 | buffer is actually killed, nil otherwise. | |
1495 | ||
b7e8d081 MR |
1496 | The functions in `kill-buffer-query-functions' are called with the |
1497 | buffer to be killed as the current buffer. If any of them returns nil, | |
1498 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1499 | buffer is actually killed. The buffer being killed will be current | |
1500 | while the hook is running. Functions called by any of these hooks are | |
1501 | supposed to not change the current buffer. | |
018ba359 PJ |
1502 | |
1503 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1504 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1505 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1506 | (Lisp_Object buffer_or_name) |
1ab256cb | 1507 | { |
c8804c4f | 1508 | Lisp_Object buffer; |
1ab256cb RM |
1509 | register struct buffer *b; |
1510 | register Lisp_Object tem; | |
1511 | register struct Lisp_Marker *m; | |
6af718a4 | 1512 | struct gcpro gcpro1; |
1ab256cb | 1513 | |
c8804c4f MR |
1514 | if (NILP (buffer_or_name)) |
1515 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1516 | else |
c8804c4f MR |
1517 | buffer = Fget_buffer (buffer_or_name); |
1518 | if (NILP (buffer)) | |
1519 | nsberror (buffer_or_name); | |
1ab256cb | 1520 | |
c8804c4f | 1521 | b = XBUFFER (buffer); |
1ab256cb | 1522 | |
4a4a9db5 | 1523 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1524 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1525 | return Qnil; |
1526 | ||
1ab256cb | 1527 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1528 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1529 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1530 | { |
c8804c4f | 1531 | GCPRO1 (buffer); |
5c4930b0 | 1532 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1533 | BVAR (b, name), make_number (0))); |
1ab256cb | 1534 | UNGCPRO; |
265a9e55 | 1535 | if (NILP (tem)) |
1ab256cb RM |
1536 | return Qnil; |
1537 | } | |
1538 | ||
dcdffbf6 | 1539 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1540 | { |
d311d28c | 1541 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1542 | Lisp_Object arglist[1]; |
1ab256cb RM |
1543 | |
1544 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1545 | set_buffer_internal (b); | |
dcdffbf6 RS |
1546 | |
1547 | /* First run the query functions; if any query is answered no, | |
1548 | don't kill the buffer. */ | |
5b20caf0 | 1549 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1550 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1551 | if (NILP (tem)) | |
5b20caf0 | 1552 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1553 | |
1554 | /* Then run the hooks. */ | |
f1597a3a | 1555 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1556 | unbind_to (count, Qnil); |
1557 | } | |
1558 | ||
b7e8d081 MR |
1559 | /* If the hooks have killed the buffer, exit now. */ |
1560 | if (NILP (BVAR (b, name))) | |
1561 | return Qt; | |
1562 | ||
1ab256cb RM |
1563 | /* We have no more questions to ask. Verify that it is valid |
1564 | to kill the buffer. This must be done after the questions | |
1565 | since anything can happen within do_yes_or_no_p. */ | |
1566 | ||
1567 | /* Don't kill the minibuffer now current. */ | |
d3d50620 | 1568 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1569 | return Qnil; |
1570 | ||
9928463d DA |
1571 | /* When we kill an ordinary buffer which shares it's buffer text |
1572 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1573 | We do it at this stage so nothing terrible happens if they |
1574 | ask questions or their hooks get errors. */ | |
9928463d | 1575 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1576 | { |
1577 | struct buffer *other; | |
1578 | ||
c8804c4f | 1579 | GCPRO1 (buffer); |
336cd056 | 1580 | |
52b852c7 | 1581 | FOR_EACH_BUFFER (other) |
d17337e5 | 1582 | if (other->base_buffer == b) |
336cd056 | 1583 | { |
8f54f30a PE |
1584 | Lisp_Object buf; |
1585 | XSETBUFFER (buf, other); | |
1586 | Fkill_buffer (buf); | |
336cd056 RS |
1587 | } |
1588 | ||
1589 | UNGCPRO; | |
b7e8d081 MR |
1590 | |
1591 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
1592 | if (NILP (BVAR (b, name))) | |
1593 | return Qt; | |
336cd056 | 1594 | } |
177c0ea7 | 1595 | |
56e2e794 MR |
1596 | /* Run replace_buffer_in_windows before making another buffer current |
1597 | since set-window-buffer-start-and-point will refuse to make another | |
1598 | buffer current if the selected window does not show the current | |
1599 | buffer. (Bug#10114) */ | |
1600 | replace_buffer_in_windows (buffer); | |
1601 | ||
b7e8d081 MR |
1602 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
1603 | if (NILP (BVAR (b, name))) | |
1604 | return Qt; | |
1605 | ||
1606 | /* Make this buffer not be current. Exit if it is the sole visible | |
1607 | buffer. */ | |
1ab256cb RM |
1608 | if (b == current_buffer) |
1609 | { | |
c8804c4f | 1610 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1611 | Fset_buffer (tem); |
1612 | if (b == current_buffer) | |
1613 | return Qnil; | |
1614 | } | |
1615 | ||
b7e8d081 MR |
1616 | /* If the buffer now current is shown in the minibuffer and our buffer |
1617 | is the sole other buffer give up. */ | |
77270fac | 1618 | XSETBUFFER (tem, current_buffer); |
d3d50620 | 1619 | if (EQ (tem, XWINDOW (minibuf_window)->buffer) |
b7e8d081 MR |
1620 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1621 | return Qnil; | |
77270fac | 1622 | |
1ab256cb RM |
1623 | /* Now there is no question: we can kill the buffer. */ |
1624 | ||
1625 | #ifdef CLASH_DETECTION | |
1626 | /* Unlock this buffer's file, if it is locked. */ | |
1627 | unlock_buffer (b); | |
1628 | #endif /* CLASH_DETECTION */ | |
1629 | ||
c8804c4f MR |
1630 | GCPRO1 (buffer); |
1631 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1632 | UNGCPRO; |
1633 | ||
b7e8d081 MR |
1634 | /* Killing buffer processes may run sentinels which may have killed |
1635 | our buffer. */ | |
4b4deea2 | 1636 | if (NILP (BVAR (b, name))) |
b7e8d081 | 1637 | return Qt; |
49da74e6 | 1638 | |
9397e56f MR |
1639 | /* These may run Lisp code and into infinite loops (if someone |
1640 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1641 | frames_discard_buffer (buffer); |
1642 | ||
b93fb365 | 1643 | clear_charpos_cache (b); |
1ab256cb RM |
1644 | |
1645 | tem = Vinhibit_quit; | |
1646 | Vinhibit_quit = Qt; | |
9397e56f | 1647 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1648 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1649 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1650 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1651 | Vinhibit_quit = tem; |
1652 | ||
9cf712eb RS |
1653 | /* Delete any auto-save file, if we saved it in this session. |
1654 | But not if the buffer is modified. */ | |
4b4deea2 | 1655 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1656 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1657 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1658 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1659 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1660 | { |
8f54f30a PE |
1661 | Lisp_Object delete; |
1662 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1663 | if (! NILP (delete)) | |
4b4deea2 | 1664 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1665 | } |
1666 | ||
b7e8d081 MR |
1667 | /* Deleting an auto-save file could have killed our buffer. */ |
1668 | if (NILP (BVAR (b, name))) | |
1669 | return Qt; | |
1670 | ||
4a4a9db5 KH |
1671 | if (b->base_buffer) |
1672 | { | |
1673 | /* Unchain all markers that belong to this indirect buffer. | |
1674 | Don't unchain the markers that belong to the base buffer | |
1675 | or its other indirect buffers. */ | |
65745fad | 1676 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1677 | { |
65745fad | 1678 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1679 | if (m->buffer == b) |
65745fad SM |
1680 | unchain_marker (m); |
1681 | m = next; | |
4a4a9db5 KH |
1682 | } |
1683 | } | |
1684 | else | |
1ab256cb | 1685 | { |
4a4a9db5 | 1686 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1687 | and leave them pointing nowhere. */ |
65745fad | 1688 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1689 | { |
65745fad | 1690 | struct Lisp_Marker *next = m->next; |
336cd056 | 1691 | m->buffer = 0; |
65745fad SM |
1692 | m->next = NULL; |
1693 | m = next; | |
336cd056 | 1694 | } |
65745fad | 1695 | BUF_MARKERS (b) = NULL; |
8707c1e5 | 1696 | buffer_set_intervals (b, NULL); |
336cd056 RS |
1697 | |
1698 | /* Perhaps we should explicitly free the interval tree here... */ | |
1699 | } | |
33f7013e | 1700 | |
2f3f993b RS |
1701 | /* Reset the local variables, so that this buffer's local values |
1702 | won't be protected from GC. They would be protected | |
e4769531 | 1703 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1704 | This gets rid of them for certain. */ |
1705 | swap_out_buffer_local_variables (b); | |
13de9290 | 1706 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1707 | |
4c31be61 | 1708 | BSET (b, name, Qnil); |
336cd056 | 1709 | |
9ac0d9e0 | 1710 | BLOCK_INPUT; |
04e9897c DA |
1711 | if (b->base_buffer) |
1712 | { | |
1713 | /* Notify our base buffer that we don't share the text anymore. */ | |
1714 | eassert (b->indirections == -1); | |
1715 | b->base_buffer->indirections--; | |
1716 | eassert (b->base_buffer->indirections >= 0); | |
1717 | } | |
1718 | else | |
1719 | /* No one shares our buffer text, can free it. */ | |
b86af064 | 1720 | free_buffer_text (b); |
336cd056 | 1721 | |
28e969dd JB |
1722 | if (b->newline_cache) |
1723 | { | |
1724 | free_region_cache (b->newline_cache); | |
1725 | b->newline_cache = 0; | |
1726 | } | |
1727 | if (b->width_run_cache) | |
1728 | { | |
1729 | free_region_cache (b->width_run_cache); | |
1730 | b->width_run_cache = 0; | |
1731 | } | |
4c31be61 | 1732 | BSET (b, width_table, Qnil); |
9ac0d9e0 | 1733 | UNBLOCK_INPUT; |
4c31be61 | 1734 | BSET (b, undo_list, Qnil); |
1ab256cb | 1735 | |
9397e56f MR |
1736 | /* Run buffer-list-update-hook. */ |
1737 | if (!NILP (Vrun_hooks)) | |
1738 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1739 | ||
1ab256cb RM |
1740 | return Qt; |
1741 | } | |
1742 | \f | |
9397e56f MR |
1743 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1744 | we do this each time BUFFER is selected visibly, the more recently | |
1745 | selected buffers are always closer to the front of those lists. This | |
1746 | means that other_buffer is more likely to choose a relevant buffer. | |
1747 | ||
1748 | Note that this moves BUFFER to the front of the buffer lists of the | |
1749 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1750 | shown in the selected frame, consider the present behavior a feature. | |
1751 | `select-window' gets this right since it shows BUFFER in the selected | |
1752 | window when calling us. */ | |
1ab256cb | 1753 | |
01136e9b | 1754 | void |
9397e56f | 1755 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1756 | { |
4475bec4 | 1757 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1758 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1759 | |
9397e56f | 1760 | CHECK_BUFFER (buffer); |
1ab256cb | 1761 | |
9397e56f MR |
1762 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1763 | Don't allow quitting since this might leave the buffer list in an | |
1764 | inconsistent state. */ | |
1765 | tem = Vinhibit_quit; | |
1766 | Vinhibit_quit = Qt; | |
1767 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1768 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1769 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1770 | XSETCDR (aelt_cons, Vbuffer_alist); |
1771 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1772 | Vinhibit_quit = tem; |
1ab256cb | 1773 | |
9397e56f | 1774 | /* Update buffer list of selected frame. */ |
e69b0960 DA |
1775 | FSET (f, buffer_list, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
1776 | FSET (f, buried_buffer_list, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 1777 | |
9397e56f MR |
1778 | /* Run buffer-list-update-hook. */ |
1779 | if (!NILP (Vrun_hooks)) | |
1780 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1781 | } | |
7962a441 | 1782 | |
7962a441 | 1783 | |
e4ed06f1 CY |
1784 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1785 | buffer is killed. For the selected frame's buffer list this moves | |
1786 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 1787 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 1788 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 1789 | |
e4ed06f1 CY |
1790 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1791 | 1, 1, 0, | |
1792 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1793 | (Lisp_Object buffer) |
1794 | { | |
4475bec4 | 1795 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1796 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1797 | |
9397e56f | 1798 | CHECK_BUFFER (buffer); |
177c0ea7 | 1799 | |
9397e56f MR |
1800 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1801 | Don't allow quitting since this might leave the buffer list in an | |
1802 | inconsistent state. */ | |
1803 | tem = Vinhibit_quit; | |
1804 | Vinhibit_quit = Qt; | |
1805 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1806 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1807 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1808 | XSETCDR (aelt_cons, Qnil); |
1809 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1810 | Vinhibit_quit = tem; |
1811 | ||
1812 | /* Update buffer lists of selected frame. */ | |
e69b0960 | 1813 | FSET (f, buffer_list, Fdelq (buffer, f->buffer_list)); |
edd74c35 | 1814 | FSET (f, buried_buffer_list, |
e69b0960 | 1815 | Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); |
9397e56f MR |
1816 | |
1817 | /* Run buffer-list-update-hook. */ | |
1818 | if (!NILP (Vrun_hooks)) | |
1819 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1820 | ||
e4ed06f1 | 1821 | return Qnil; |
1ab256cb RM |
1822 | } |
1823 | ||
a9ee7a59 | 1824 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1825 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1826 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1827 | according to `default-major-mode'. |
018ba359 | 1828 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1829 | the current buffer's major mode. */) |
5842a27b | 1830 | (Lisp_Object buffer) |
a9ee7a59 | 1831 | { |
d311d28c | 1832 | ptrdiff_t count; |
a9ee7a59 KH |
1833 | Lisp_Object function; |
1834 | ||
ea4fddd8 JB |
1835 | CHECK_BUFFER (buffer); |
1836 | ||
4b4deea2 TT |
1837 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1838 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1839 | function = find_symbol_value (intern ("initial-major-mode")); |
1840 | else | |
1841 | { | |
4b4deea2 | 1842 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1843 | if (NILP (function) |
4b4deea2 TT |
1844 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1845 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1846 | } |
177c0ea7 | 1847 | |
48265e61 DL |
1848 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1849 | return Qnil; | |
1850 | ||
aed13378 | 1851 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1852 | |
48265e61 DL |
1853 | /* To select a nonfundamental mode, |
1854 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1855 | |
1856 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1857 | ||
a2428fa2 | 1858 | Fset_buffer (buffer); |
48265e61 | 1859 | call0 (function); |
a9ee7a59 KH |
1860 | |
1861 | return unbind_to (count, Qnil); | |
1862 | } | |
1863 | ||
a7ca3326 | 1864 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1865 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1866 | (void) |
1ab256cb RM |
1867 | { |
1868 | register Lisp_Object buf; | |
67180c6a | 1869 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1870 | return buf; |
1871 | } | |
1872 | \f | |
7ec44ec6 GM |
1873 | /* Set the current buffer to B. |
1874 | ||
1875 | We previously set windows_or_buffers_changed here to invalidate | |
1876 | global unchanged information in beg_unchanged and end_unchanged. | |
1877 | This is no longer necessary because we now compute unchanged | |
1878 | information on a buffer-basis. Every action affecting other | |
1879 | windows than the selected one requires a select_window at some | |
1880 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1881 | |
1882 | void | |
d3da34e0 | 1883 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1884 | { |
b5a225b4 | 1885 | if (current_buffer != b) |
7ec44ec6 | 1886 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1887 | } |
1888 | ||
1889 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1890 | This is used by redisplay. */ | |
1891 | ||
1892 | void | |
d3da34e0 | 1893 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1894 | { |
1895 | register struct buffer *old_buf; | |
ce5b453a | 1896 | register Lisp_Object tail; |
c7aa5005 | 1897 | |
b86af064 | 1898 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1899 | if (b->text->beg == NULL) |
b86af064 GM |
1900 | enlarge_buffer_text (b, 0); |
1901 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1902 | |
c7aa5005 KH |
1903 | if (current_buffer == b) |
1904 | return; | |
1905 | ||
1ab256cb RM |
1906 | old_buf = current_buffer; |
1907 | current_buffer = b; | |
1908 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1909 | ||
336cd056 RS |
1910 | if (old_buf) |
1911 | { | |
1912 | /* Put the undo list back in the base buffer, so that it appears | |
1913 | that an indirect buffer shares the undo list of its base. */ | |
1914 | if (old_buf->base_buffer) | |
4c31be61 | 1915 | BSET (old_buf->base_buffer, undo_list, BVAR (old_buf, undo_list)); |
336cd056 RS |
1916 | |
1917 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1918 | when it is not current, update them now. */ | |
cffc6f3b | 1919 | record_buffer_markers (old_buf); |
336cd056 RS |
1920 | } |
1921 | ||
1922 | /* Get the undo list from the base buffer, so that it appears | |
1923 | that an indirect buffer shares the undo list of its base. */ | |
1924 | if (b->base_buffer) | |
4c31be61 | 1925 | BSET (b, undo_list, BVAR (b->base_buffer, undo_list)); |
336cd056 RS |
1926 | |
1927 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1928 | when it is not current, fetch them now. */ | |
cffc6f3b | 1929 | fetch_buffer_markers (b); |
336cd056 | 1930 | |
1ab256cb RM |
1931 | /* Look down buffer's list of local Lisp variables |
1932 | to find and update any that forward into C variables. */ | |
1933 | ||
ce5b453a | 1934 | do |
1ab256cb | 1935 | { |
4b4deea2 | 1936 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1937 | { |
1938 | Lisp_Object var = XCAR (XCAR (tail)); | |
1939 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1940 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1941 | && SYMBOL_BLV (sym)->fwd) | |
1942 | /* Just reference the variable | |
1943 | to cause it to become set for this buffer. */ | |
1944 | Fsymbol_value (var); | |
1945 | } | |
1ab256cb | 1946 | } |
1ab256cb | 1947 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1948 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1949 | } |
1950 | ||
336cd056 | 1951 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1952 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1953 | |
1954 | void | |
d3da34e0 | 1955 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1956 | { |
1957 | register struct buffer *old_buf; | |
1958 | ||
1959 | if (current_buffer == b) | |
1960 | return; | |
1961 | ||
1962 | old_buf = current_buffer; | |
1963 | current_buffer = b; | |
1964 | ||
cffc6f3b CY |
1965 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1966 | when it is not current, update them now. */ | |
1967 | record_buffer_markers (old_buf); | |
336cd056 RS |
1968 | |
1969 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1970 | when it is not current, fetch them now. */ | |
cffc6f3b | 1971 | fetch_buffer_markers (b); |
336cd056 RS |
1972 | } |
1973 | ||
a7ca3326 | 1974 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1975 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1976 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1977 | also `save-excursion' when you want to make a buffer current | |
1978 | temporarily. This function does not display the buffer, so its effect | |
1979 | ends when the current command terminates. Use `switch-to-buffer' or | |
1980 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1981 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1982 | { |
c8804c4f MR |
1983 | register Lisp_Object buffer; |
1984 | buffer = Fget_buffer (buffer_or_name); | |
1985 | if (NILP (buffer)) | |
1986 | nsberror (buffer_or_name); | |
4b4deea2 | 1987 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1988 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1989 | set_buffer_internal (XBUFFER (buffer)); |
1990 | return buffer; | |
1ab256cb | 1991 | } |
d0628b06 RS |
1992 | |
1993 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1994 | ||
1995 | Lisp_Object | |
d3da34e0 | 1996 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1997 | { |
4b4deea2 | 1998 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1999 | Fset_buffer (buffer); |
2000 | return Qnil; | |
2001 | } | |
1ab256cb | 2002 | \f |
a7ca3326 | 2003 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2004 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2005 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2006 | (void) |
1ab256cb | 2007 | { |
4b4deea2 | 2008 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2009 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2010 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2011 | return Qnil; |
2012 | } | |
1ab256cb | 2013 | \f |
a7ca3326 | 2014 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2015 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2016 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2017 | so the buffer is truly empty after this. */) |
5842a27b | 2018 | (void) |
1ab256cb RM |
2019 | { |
2020 | Fwiden (); | |
c0d9a0c3 GM |
2021 | |
2022 | del_range (BEG, Z); | |
c280bc6a | 2023 | |
1ab256cb RM |
2024 | current_buffer->last_window_start = 1; |
2025 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2026 | if future size is less than past size. Use of erase-buffer | |
2027 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2028 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2029 | return Qnil; |
2030 | } | |
2031 | ||
01136e9b | 2032 | void |
d3da34e0 | 2033 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2034 | { |
b7826503 PJ |
2035 | CHECK_NUMBER_COERCE_MARKER (*b); |
2036 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2037 | |
2038 | if (XINT (*b) > XINT (*e)) | |
2039 | { | |
03192067 KH |
2040 | Lisp_Object tem; |
2041 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2042 | } |
2043 | ||
d311d28c | 2044 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2045 | args_out_of_range (*b, *e); |
2046 | } | |
2047 | \f | |
b05525fa RS |
2048 | /* Advance BYTE_POS up to a character boundary |
2049 | and return the adjusted position. */ | |
2050 | ||
d311d28c PE |
2051 | static ptrdiff_t |
2052 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2053 | { |
f8449323 | 2054 | int c; |
b05525fa | 2055 | |
f8449323 RS |
2056 | if (byte_pos == BEG) |
2057 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2058 | return BEG; |
f8449323 RS |
2059 | |
2060 | c = FETCH_BYTE (byte_pos); | |
2061 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2062 | { |
1be6387d | 2063 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2064 | multibyte sequence. */ |
d311d28c | 2065 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2066 | |
2067 | do | |
2068 | { | |
2069 | byte_pos--; | |
2070 | c = FETCH_BYTE (byte_pos); | |
2071 | } | |
2072 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2073 | INC_POS (byte_pos); |
a9bcded1 KH |
2074 | if (byte_pos < orig_byte_pos) |
2075 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2076 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2077 | surely advance to the correct character boundary. If C is | |
2078 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2079 | } |
2080 | ||
20773569 | 2081 | return byte_pos; |
b05525fa RS |
2082 | } |
2083 | ||
13cda5f9 SM |
2084 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2085 | 1, 1, 0, | |
2086 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2087 | (Lisp_Object buffer) |
13cda5f9 SM |
2088 | { |
2089 | struct buffer *other_buffer; | |
2090 | CHECK_BUFFER (buffer); | |
2091 | other_buffer = XBUFFER (buffer); | |
2092 | ||
4b4deea2 | 2093 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2094 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2095 | |
13cda5f9 SM |
2096 | /* Actually, it probably works just fine. |
2097 | * if (other_buffer == current_buffer) | |
2098 | * error ("Cannot swap a buffer's text with itself"); */ | |
2099 | ||
2100 | /* Actually, this may be workable as well, tho probably only if they're | |
2101 | *both* indirect. */ | |
2102 | if (other_buffer->base_buffer | |
2103 | || current_buffer->base_buffer) | |
2104 | error ("Cannot swap indirect buffers's text"); | |
2105 | ||
2106 | { /* This is probably harder to make work. */ | |
2107 | struct buffer *other; | |
52b852c7 | 2108 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2109 | if (other->base_buffer == other_buffer |
2110 | || other->base_buffer == current_buffer) | |
2111 | error ("One of the buffers to swap has indirect buffers"); | |
2112 | } | |
2113 | ||
2114 | #define swapfield(field, type) \ | |
2115 | do { \ | |
2116 | type tmp##field = other_buffer->field; \ | |
2117 | other_buffer->field = current_buffer->field; \ | |
2118 | current_buffer->field = tmp##field; \ | |
2119 | } while (0) | |
5d8ea120 TT |
2120 | #define swapfield_(field, type) \ |
2121 | do { \ | |
4b4deea2 | 2122 | type tmp##field = BVAR (other_buffer, field); \ |
4c31be61 DA |
2123 | BSET (other_buffer, field, BVAR (current_buffer, field)); \ |
2124 | BSET (current_buffer, field, tmp##field); \ | |
5d8ea120 | 2125 | } while (0) |
13cda5f9 SM |
2126 | |
2127 | swapfield (own_text, struct buffer_text); | |
2128 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2129 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2130 | #ifdef REL_ALLOC |
261cb4bb PE |
2131 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2132 | (void **) &other_buffer->own_text.beg); | |
2133 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2134 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2135 | #endif /* REL_ALLOC */ |
2136 | ||
d311d28c PE |
2137 | swapfield (pt, ptrdiff_t); |
2138 | swapfield (pt_byte, ptrdiff_t); | |
2139 | swapfield (begv, ptrdiff_t); | |
2140 | swapfield (begv_byte, ptrdiff_t); | |
2141 | swapfield (zv, ptrdiff_t); | |
2142 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2143 | eassert (!current_buffer->base_buffer); |
2144 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2145 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2146 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2147 | swapfield (newline_cache, struct region_cache *); | |
2148 | swapfield (width_run_cache, struct region_cache *); | |
2149 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2150 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2151 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2152 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2153 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2154 | swapfield_ (undo_list, Lisp_Object); |
2155 | swapfield_ (mark, Lisp_Object); | |
2156 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2157 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2158 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2159 | /* FIXME: Not sure what we should do with these *_marker fields. |
2160 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2161 | swapfield_ (pt_marker, Lisp_Object); |
2162 | swapfield_ (begv_marker, Lisp_Object); | |
2163 | swapfield_ (zv_marker, Lisp_Object); | |
4c31be61 DA |
2164 | BSET (current_buffer, point_before_scroll, Qnil); |
2165 | BSET (other_buffer, point_before_scroll, Qnil); | |
13cda5f9 SM |
2166 | |
2167 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2168 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2169 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2170 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2171 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2172 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2173 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2174 | { |
2175 | struct Lisp_Marker *m; | |
2176 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2177 | if (m->buffer == other_buffer) | |
2178 | m->buffer = current_buffer; | |
b8ff72fa SM |
2179 | else |
2180 | /* Since there's no indirect buffer in sight, markers on | |
2181 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2182 | eassert (!m->buffer); | |
13cda5f9 SM |
2183 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2184 | if (m->buffer == current_buffer) | |
2185 | m->buffer = other_buffer; | |
b8ff72fa SM |
2186 | else |
2187 | /* Since there's no indirect buffer in sight, markers on | |
2188 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2189 | eassert (!m->buffer); | |
13cda5f9 | 2190 | } |
126f1fc1 SM |
2191 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2192 | So since we just swapped the markers between the two buffers, we need | |
2193 | to undo the effect of this swap for window markers. */ | |
2194 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2195 | Lisp_Object buf1, buf2; | |
2196 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2197 | ||
2198 | while (NILP (Fmemq (w, ws))) | |
2199 | { | |
2200 | ws = Fcons (w, ws); | |
d3d50620 DA |
2201 | if (MARKERP (XWINDOW (w)->pointm) |
2202 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2203 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2204 | Fset_marker (XWINDOW (w)->pointm, | |
3a45383a | 2205 | make_number |
d3d50620 DA |
2206 | (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), |
2207 | XWINDOW (w)->buffer); | |
126f1fc1 SM |
2208 | w = Fnext_window (w, Qt, Qt); |
2209 | } | |
2210 | } | |
2211 | ||
13cda5f9 SM |
2212 | if (current_buffer->text->intervals) |
2213 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2214 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2215 | if (other_buffer->text->intervals) | |
2216 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2217 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2218 | ||
2219 | return Qnil; | |
2220 | } | |
2221 | ||
a7ca3326 | 2222 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2223 | 1, 1, 0, |
7ee72033 | 2224 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2225 | If FLAG is t, this makes the buffer a multibyte buffer. |
2226 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2227 | In these cases, the buffer contents remain unchanged as a sequence of |
2228 | bytes but the contents viewed as characters do change. | |
2229 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2230 | all eight-bit bytes to eight-bit characters. |
2231 | If the multibyte flag was really changed, undo information of the | |
2232 | current buffer is cleared. */) | |
5842a27b | 2233 | (Lisp_Object flag) |
3ac81adb | 2234 | { |
65745fad | 2235 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2236 | struct buffer *other; |
d311d28c | 2237 | ptrdiff_t begv, zv; |
8d1203ea | 2238 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2239 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2240 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2241 | struct gcpro gcpro1; |
3ac81adb | 2242 | |
6e553d5e RS |
2243 | if (current_buffer->base_buffer) |
2244 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2245 | ||
70e77119 | 2246 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2247 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2248 | return flag; |
2249 | ||
38babc07 KS |
2250 | GCPRO1 (old_undo); |
2251 | ||
2252 | /* Don't record these buffer changes. We will put a special undo entry | |
2253 | instead. */ | |
4c31be61 | 2254 | BSET (current_buffer, undo_list, Qt); |
b05525fa | 2255 | |
3ac81adb RS |
2256 | /* If the cached position is for this buffer, clear it out. */ |
2257 | clear_charpos_cache (current_buffer); | |
2258 | ||
458c8af4 KH |
2259 | if (NILP (flag)) |
2260 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2261 | else | |
2262 | begv = BEGV, zv = ZV; | |
2263 | ||
a9bcded1 KH |
2264 | if (narrowed) |
2265 | Fwiden (); | |
2266 | ||
3ac81adb RS |
2267 | if (NILP (flag)) |
2268 | { | |
d311d28c | 2269 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2270 | unsigned char *p; |
2271 | ||
3ac81adb RS |
2272 | /* Do this first, so it can use CHAR_TO_BYTE |
2273 | to calculate the old correspondences. */ | |
2274 | set_intervals_multibyte (0); | |
2275 | ||
4c31be61 | 2276 | BSET (current_buffer, enable_multibyte_characters, Qnil); |
3ac81adb RS |
2277 | |
2278 | Z = Z_BYTE; | |
2279 | BEGV = BEGV_BYTE; | |
2280 | ZV = ZV_BYTE; | |
2281 | GPT = GPT_BYTE; | |
2282 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2283 | ||
60ebfdf3 | 2284 | |
65745fad SM |
2285 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2286 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2287 | |
2288 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2289 | pos = BEG; | |
2290 | stop = GPT; | |
2291 | p = BEG_ADDR; | |
2292 | while (1) | |
2293 | { | |
2294 | int c, bytes; | |
2295 | ||
2296 | if (pos == stop) | |
2297 | { | |
2298 | if (pos == Z) | |
2299 | break; | |
2300 | p = GAP_END_ADDR; | |
2301 | stop = Z; | |
2302 | } | |
8f348ed5 KH |
2303 | if (ASCII_BYTE_P (*p)) |
2304 | p++, pos++; | |
2305 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2306 | { |
62a6e103 | 2307 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2308 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2309 | last one, and change the last one to the character |
a9bcded1 KH |
2310 | code. */ |
2311 | bytes--; | |
2312 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2313 | p = GAP_END_ADDR; | |
2314 | *p++ = c; | |
2315 | pos++; | |
2316 | if (begv > pos) | |
2317 | begv -= bytes; | |
2318 | if (zv > pos) | |
2319 | zv -= bytes; | |
2320 | stop = Z; | |
2321 | } | |
8f924df7 | 2322 | else |
8f348ed5 KH |
2323 | { |
2324 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2325 | p += bytes, pos += bytes; | |
2326 | } | |
a9bcded1 KH |
2327 | } |
2328 | if (narrowed) | |
2329 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2330 | } |
2331 | else | |
2332 | { | |
d311d28c PE |
2333 | ptrdiff_t pt = PT; |
2334 | ptrdiff_t pos, stop; | |
8f348ed5 | 2335 | unsigned char *p, *pend; |
a9bcded1 | 2336 | |
673c57d2 | 2337 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2338 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2339 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2340 | |
8f924df7 | 2341 | if (EQ (flag, Qt) |
a3a303df | 2342 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2343 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2344 | { | |
8f54f30a | 2345 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2346 | |
8f54f30a PE |
2347 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2348 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2349 | { |
d311d28c | 2350 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2351 | |
2352 | move_gap_both (new_gpt, new_gpt); | |
2353 | } | |
2354 | } | |
2355 | ||
a9bcded1 KH |
2356 | /* Make the buffer contents valid as multibyte by converting |
2357 | 8-bit characters to multibyte form. */ | |
2358 | pos = BEG; | |
2359 | stop = GPT; | |
2360 | p = BEG_ADDR; | |
8f348ed5 | 2361 | pend = GPT_ADDR; |
a9bcded1 KH |
2362 | while (1) |
2363 | { | |
2364 | int bytes; | |
2365 | ||
2366 | if (pos == stop) | |
2367 | { | |
2368 | if (pos == Z) | |
2369 | break; | |
2370 | p = GAP_END_ADDR; | |
8f348ed5 | 2371 | pend = Z_ADDR; |
a9bcded1 KH |
2372 | stop = Z; |
2373 | } | |
177c0ea7 | 2374 | |
a3a303df KH |
2375 | if (ASCII_BYTE_P (*p)) |
2376 | p++, pos++; | |
dcfb9bc4 KH |
2377 | else if (EQ (flag, Qt) |
2378 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2379 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2380 | p += bytes, pos += bytes; |
2381 | else | |
2382 | { | |
2383 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2384 | int c; |
a9bcded1 | 2385 | |
8f924df7 | 2386 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2387 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2388 | *p = tmp[0]; |
2389 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2390 | bytes--; | |
b68864e5 | 2391 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2392 | /* Now the gap is after the just inserted data. */ |
2393 | pos = GPT; | |
2394 | p = GAP_END_ADDR; | |
2395 | if (pos <= begv) | |
2396 | begv += bytes; | |
2397 | if (pos <= zv) | |
2398 | zv += bytes; | |
2399 | if (pos <= pt) | |
2400 | pt += bytes; | |
31285a8f | 2401 | pend = Z_ADDR; |
a9bcded1 KH |
2402 | stop = Z; |
2403 | } | |
2404 | } | |
2405 | ||
2406 | if (pt != PT) | |
2407 | TEMP_SET_PT (pt); | |
2408 | ||
2409 | if (narrowed) | |
2410 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2411 | ||
3ac81adb RS |
2412 | /* Do this first, so that chars_in_text asks the right question. |
2413 | set_intervals_multibyte needs it too. */ | |
4c31be61 | 2414 | BSET (current_buffer, enable_multibyte_characters, Qt); |
3ac81adb | 2415 | |
b05525fa | 2416 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2417 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2418 | |
673c57d2 | 2419 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2420 | |
2421 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2422 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2423 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2424 | else |
2425 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2426 | |
2427 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2428 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2429 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2430 | else |
2431 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2432 | |
2433 | { | |
d311d28c PE |
2434 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2435 | ptrdiff_t position; | |
b05525fa | 2436 | |
8f54f30a PE |
2437 | if (byte > GPT_BYTE) |
2438 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2439 | else |
8f54f30a PE |
2440 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2441 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2442 | } |
3ac81adb RS |
2443 | |
2444 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2445 | |
2446 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2447 | getting confused by the markers that have not yet been updated. | |
2448 | It is also a signal that it should never create a marker. */ | |
65745fad | 2449 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2450 | |
65745fad | 2451 | for (; tail; tail = tail->next) |
3ac81adb | 2452 | { |
65745fad SM |
2453 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2454 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2455 | } |
b69f9797 RS |
2456 | |
2457 | /* Make sure no markers were put on the chain | |
2458 | while the chain value was incorrect. */ | |
65745fad | 2459 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2460 | abort (); |
2461 | ||
3ac81adb RS |
2462 | BUF_MARKERS (current_buffer) = markers; |
2463 | ||
2464 | /* Do this last, so it can calculate the new correspondences | |
2465 | between chars and bytes. */ | |
2466 | set_intervals_multibyte (1); | |
2467 | } | |
2468 | ||
38babc07 KS |
2469 | if (!EQ (old_undo, Qt)) |
2470 | { | |
2471 | /* Represent all the above changes by a special undo entry. */ | |
4c31be61 DA |
2472 | BSET (current_buffer, undo_list, |
2473 | Fcons (list3 (Qapply, | |
2474 | intern ("set-buffer-multibyte"), | |
2475 | NILP (flag) ? Qt : Qnil), | |
2476 | old_undo)); | |
38babc07 KS |
2477 | } |
2478 | ||
2479 | UNGCPRO; | |
a9bcded1 | 2480 | |
724b203f GM |
2481 | /* Changing the multibyteness of a buffer means that all windows |
2482 | showing that buffer must be updated thoroughly. */ | |
2483 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2484 | ++windows_or_buffers_changed; | |
2485 | ||
abc9d959 RS |
2486 | /* Copy this buffer's new multibyte status |
2487 | into all of its indirect buffers. */ | |
52b852c7 | 2488 | FOR_EACH_BUFFER (other) |
4b4deea2 | 2489 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2490 | { |
4b4deea2 TT |
2491 | BVAR (other, enable_multibyte_characters) |
2492 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2493 | other->prevent_redisplay_optimizations_p = 1; |
2494 | } | |
abc9d959 | 2495 | |
ed00559d KH |
2496 | /* Restore the modifiedness of the buffer. */ |
2497 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2498 | Fset_buffer_modified_p (Qnil); | |
2499 | ||
172f9454 KH |
2500 | /* Update coding systems of this buffer's process (if any). */ |
2501 | { | |
2502 | Lisp_Object process; | |
2503 | ||
2504 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2505 | if (PROCESSP (process)) | |
2506 | setup_process_coding_systems (process); | |
2507 | } | |
2508 | ||
3ac81adb RS |
2509 | return flag; |
2510 | } | |
2511 | \f | |
a7ca3326 | 2512 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2513 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2514 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2515 | Most local variable bindings are eliminated so that the default values |
2516 | become effective once more. Also, the syntax table is set from | |
2517 | `standard-syntax-table', the local keymap is set to nil, | |
2518 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2519 | This function also forces redisplay of the mode line. | |
2520 | ||
2521 | Every function to select a new major mode starts by | |
2522 | calling this function. | |
2523 | ||
2524 | As a special exception, local variables whose names have | |
2525 | a non-nil `permanent-local' property are not eliminated by this function. | |
2526 | ||
2527 | The first thing this function does is run | |
7ee72033 | 2528 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2529 | (void) |
1ab256cb | 2530 | { |
dee091a3 | 2531 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2532 | |
3709505e | 2533 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2534 | remain swapped in, in their symbols. */ |
1ab256cb | 2535 | |
2f3f993b | 2536 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2537 | |
2538 | /* Actually eliminate all local bindings of this buffer. */ | |
2539 | ||
13de9290 | 2540 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2541 | |
1ab256cb RM |
2542 | /* Force mode-line redisplay. Useful here because all major mode |
2543 | commands call this function. */ | |
2544 | update_mode_lines++; | |
2545 | ||
2546 | return Qnil; | |
2547 | } | |
2f3f993b RS |
2548 | |
2549 | /* Make sure no local variables remain set up with buffer B | |
2550 | for their current values. */ | |
2551 | ||
2552 | static void | |
d3da34e0 | 2553 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2554 | { |
ce5b453a | 2555 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2556 | |
2557 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2558 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2559 | |
67ee9f6e | 2560 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2561 | { |
ce5b453a SM |
2562 | Lisp_Object sym = XCAR (XCAR (alist)); |
2563 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2564 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2565 | now cached. */ |
ce5b453a | 2566 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2567 | { |
e7c10f83 SM |
2568 | /* Symbol is set up for this buffer's old local value: |
2569 | swap it out! */ | |
ce5b453a | 2570 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2571 | } |
2572 | } | |
2573 | } | |
1ab256cb | 2574 | \f |
2eec3b4e | 2575 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2576 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2577 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2578 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2579 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2580 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2581 | or where an overlay starts which ends at or after POS; |
624d2678 | 2582 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2583 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2584 | |
2585 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2586 | when this function is called. |
2587 | ||
2588 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2589 | If EXTEND is zero, we never extend the vector, | |
2590 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2591 | But we still return the total number of overlays. |
2592 | ||
2593 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2594 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2595 | default (BEGV or ZV). */ | |
2eec3b4e | 2596 | |
b081724f PE |
2597 | ptrdiff_t |
2598 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2599 | ptrdiff_t *len_ptr, | |
d311d28c | 2600 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, int change_req) |
1ab256cb | 2601 | { |
2410d73a SM |
2602 | Lisp_Object overlay, start, end; |
2603 | struct Lisp_Overlay *tail; | |
b081724f PE |
2604 | ptrdiff_t idx = 0; |
2605 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2606 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2607 | ptrdiff_t next = ZV; |
2608 | ptrdiff_t prev = BEGV; | |
61d54cd5 RS |
2609 | int inhibit_storing = 0; |
2610 | ||
4cb3e6b3 | 2611 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
2eec3b4e | 2612 | { |
d311d28c | 2613 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2614 | |
2410d73a | 2615 | XSETMISC (overlay, tail); |
1ab256cb | 2616 | |
2eec3b4e RS |
2617 | start = OVERLAY_START (overlay); |
2618 | end = OVERLAY_END (overlay); | |
239c932b RS |
2619 | endpos = OVERLAY_POSITION (end); |
2620 | if (endpos < pos) | |
2621 | { | |
2622 | if (prev < endpos) | |
2623 | prev = endpos; | |
2624 | break; | |
2625 | } | |
413e06a4 RS |
2626 | startpos = OVERLAY_POSITION (start); |
2627 | /* This one ends at or after POS | |
daa1c109 | 2628 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2629 | if (prev < startpos && startpos < pos) |
2630 | prev = startpos; | |
239c932b RS |
2631 | if (endpos == pos) |
2632 | continue; | |
2eec3b4e RS |
2633 | if (startpos <= pos) |
2634 | { | |
2635 | if (idx == len) | |
2636 | { | |
61d54cd5 RS |
2637 | /* The supplied vector is full. |
2638 | Either make it bigger, or don't store any more in it. */ | |
2639 | if (extend) | |
2640 | { | |
0065d054 PE |
2641 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2642 | sizeof *vec); | |
61d54cd5 | 2643 | *vec_ptr = vec; |
0065d054 | 2644 | len = *len_ptr; |
61d54cd5 RS |
2645 | } |
2646 | else | |
2647 | inhibit_storing = 1; | |
2eec3b4e | 2648 | } |
61d54cd5 RS |
2649 | |
2650 | if (!inhibit_storing) | |
2651 | vec[idx] = overlay; | |
2652 | /* Keep counting overlays even if we can't return them all. */ | |
2653 | idx++; | |
2eec3b4e RS |
2654 | } |
2655 | else if (startpos < next) | |
2656 | next = startpos; | |
2657 | } | |
2658 | ||
4cb3e6b3 | 2659 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
1ab256cb | 2660 | { |
d311d28c | 2661 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2662 | |
2410d73a | 2663 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2664 | |
2665 | start = OVERLAY_START (overlay); | |
2666 | end = OVERLAY_END (overlay); | |
2667 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2668 | if (pos < startpos) |
2eec3b4e RS |
2669 | { |
2670 | if (startpos < next) | |
2671 | next = startpos; | |
2672 | break; | |
2673 | } | |
239c932b RS |
2674 | endpos = OVERLAY_POSITION (end); |
2675 | if (pos < endpos) | |
2eec3b4e RS |
2676 | { |
2677 | if (idx == len) | |
2678 | { | |
61d54cd5 RS |
2679 | if (extend) |
2680 | { | |
0065d054 PE |
2681 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2682 | sizeof *vec); | |
61d54cd5 | 2683 | *vec_ptr = vec; |
0065d054 | 2684 | len = *len_ptr; |
61d54cd5 RS |
2685 | } |
2686 | else | |
2687 | inhibit_storing = 1; | |
2eec3b4e | 2688 | } |
61d54cd5 RS |
2689 | |
2690 | if (!inhibit_storing) | |
2691 | vec[idx] = overlay; | |
2692 | idx++; | |
413e06a4 RS |
2693 | |
2694 | if (startpos < pos && startpos > prev) | |
2695 | prev = startpos; | |
2eec3b4e | 2696 | } |
239c932b RS |
2697 | else if (endpos < pos && endpos > prev) |
2698 | prev = endpos; | |
1d5f4c1d MB |
2699 | else if (endpos == pos && startpos > prev |
2700 | && (!change_req || startpos < pos)) | |
413e06a4 | 2701 | prev = startpos; |
1ab256cb RM |
2702 | } |
2703 | ||
239c932b RS |
2704 | if (next_ptr) |
2705 | *next_ptr = next; | |
2706 | if (prev_ptr) | |
2707 | *prev_ptr = prev; | |
2eec3b4e RS |
2708 | return idx; |
2709 | } | |
74514898 | 2710 | \f |
7723e095 MR |
2711 | /* Find all the overlays in the current buffer that overlap the range |
2712 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2713 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2714 | |
177c0ea7 | 2715 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2716 | Store in *LEN_PTR the size allocated for the vector. |
2717 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2718 | or ZV if there are no more overlays. | |
2719 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2720 | or BEGV if there are no previous overlays. | |
2721 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2722 | ||
2723 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2724 | when this function is called. | |
2725 | ||
2726 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2727 | If EXTEND is zero, we never extend the vector, | |
2728 | and we store only as many overlays as will fit. | |
2729 | But we still return the total number of overlays. */ | |
2730 | ||
21514da7 | 2731 | static ptrdiff_t |
145582a0 | 2732 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2733 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2734 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2735 | { |
2410d73a SM |
2736 | Lisp_Object overlay, ostart, oend; |
2737 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2738 | ptrdiff_t idx = 0; |
2739 | ptrdiff_t len = *len_ptr; | |
74514898 | 2740 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2741 | ptrdiff_t next = ZV; |
2742 | ptrdiff_t prev = BEGV; | |
74514898 | 2743 | int inhibit_storing = 0; |
7723e095 | 2744 | int end_is_Z = end == Z; |
74514898 | 2745 | |
4cb3e6b3 | 2746 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
74514898 | 2747 | { |
d311d28c | 2748 | ptrdiff_t startpos, endpos; |
74514898 | 2749 | |
2410d73a | 2750 | XSETMISC (overlay, tail); |
74514898 RS |
2751 | |
2752 | ostart = OVERLAY_START (overlay); | |
2753 | oend = OVERLAY_END (overlay); | |
2754 | endpos = OVERLAY_POSITION (oend); | |
2755 | if (endpos < beg) | |
2756 | { | |
2757 | if (prev < endpos) | |
2758 | prev = endpos; | |
2759 | break; | |
2760 | } | |
2761 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2762 | /* Count an interval if it overlaps the range, is empty at the |
2763 | start of the range, or is empty at END provided END denotes the | |
2764 | end of the buffer. */ | |
74514898 | 2765 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2766 | || (startpos == endpos |
2767 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2768 | { |
2769 | if (idx == len) | |
2770 | { | |
2771 | /* The supplied vector is full. | |
2772 | Either make it bigger, or don't store any more in it. */ | |
2773 | if (extend) | |
2774 | { | |
0065d054 PE |
2775 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2776 | sizeof *vec); | |
74514898 | 2777 | *vec_ptr = vec; |
0065d054 | 2778 | len = *len_ptr; |
74514898 RS |
2779 | } |
2780 | else | |
2781 | inhibit_storing = 1; | |
2782 | } | |
2783 | ||
2784 | if (!inhibit_storing) | |
2785 | vec[idx] = overlay; | |
2786 | /* Keep counting overlays even if we can't return them all. */ | |
2787 | idx++; | |
2788 | } | |
2789 | else if (startpos < next) | |
2790 | next = startpos; | |
2791 | } | |
2792 | ||
4cb3e6b3 | 2793 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
74514898 | 2794 | { |
d311d28c | 2795 | ptrdiff_t startpos, endpos; |
74514898 | 2796 | |
2410d73a | 2797 | XSETMISC (overlay, tail); |
74514898 RS |
2798 | |
2799 | ostart = OVERLAY_START (overlay); | |
2800 | oend = OVERLAY_END (overlay); | |
2801 | startpos = OVERLAY_POSITION (ostart); | |
2802 | if (end < startpos) | |
2803 | { | |
2804 | if (startpos < next) | |
2805 | next = startpos; | |
2806 | break; | |
2807 | } | |
2808 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2809 | /* Count an interval if it overlaps the range, is empty at the |
2810 | start of the range, or is empty at END provided END denotes the | |
2811 | end of the buffer. */ | |
74514898 | 2812 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2813 | || (startpos == endpos |
2814 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2815 | { |
2816 | if (idx == len) | |
2817 | { | |
2818 | if (extend) | |
2819 | { | |
0065d054 PE |
2820 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2821 | sizeof *vec); | |
74514898 | 2822 | *vec_ptr = vec; |
0065d054 | 2823 | len = *len_ptr; |
74514898 RS |
2824 | } |
2825 | else | |
2826 | inhibit_storing = 1; | |
2827 | } | |
2828 | ||
2829 | if (!inhibit_storing) | |
2830 | vec[idx] = overlay; | |
2831 | idx++; | |
2832 | } | |
2833 | else if (endpos < beg && endpos > prev) | |
2834 | prev = endpos; | |
2835 | } | |
fc04fa47 | 2836 | |
74514898 RS |
2837 | if (next_ptr) |
2838 | *next_ptr = next; | |
2839 | if (prev_ptr) | |
2840 | *prev_ptr = prev; | |
2841 | return idx; | |
2842 | } | |
09a22085 GM |
2843 | |
2844 | ||
2845 | /* Return non-zero if there exists an overlay with a non-nil | |
2846 | `mouse-face' property overlapping OVERLAY. */ | |
2847 | ||
2848 | int | |
d3da34e0 | 2849 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2850 | { |
d311d28c PE |
2851 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2852 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2853 | ptrdiff_t n, i, size; |
09a22085 | 2854 | Lisp_Object *v, tem; |
177c0ea7 | 2855 | |
bfd8410f | 2856 | size = 10; |
38182d90 | 2857 | v = alloca (size * sizeof *v); |
bfd8410f GM |
2858 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
2859 | if (n > size) | |
09a22085 | 2860 | { |
38182d90 | 2861 | v = alloca (n * sizeof *v); |
09a22085 GM |
2862 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
2863 | } | |
2864 | ||
2865 | for (i = 0; i < n; ++i) | |
2866 | if (!EQ (v[i], overlay) | |
2867 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2868 | !NILP (tem))) | |
2869 | break; | |
2870 | ||
2871 | return i < n; | |
2872 | } | |
2873 | ||
2874 | ||
74514898 | 2875 | \f |
fc04fa47 KH |
2876 | /* Fast function to just test if we're at an overlay boundary. */ |
2877 | int | |
d311d28c | 2878 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 2879 | { |
2410d73a SM |
2880 | Lisp_Object overlay; |
2881 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2882 | |
4cb3e6b3 | 2883 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
fc04fa47 | 2884 | { |
d311d28c | 2885 | ptrdiff_t endpos; |
fc04fa47 | 2886 | |
2410d73a | 2887 | XSETMISC (overlay ,tail); |
22657b40 | 2888 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2889 | |
2890 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2891 | if (endpos < pos) | |
2892 | break; | |
2893 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2894 | return 1; | |
2895 | } | |
2896 | ||
4cb3e6b3 | 2897 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
fc04fa47 | 2898 | { |
d311d28c | 2899 | ptrdiff_t startpos; |
fc04fa47 | 2900 | |
2410d73a | 2901 | XSETMISC (overlay, tail); |
22657b40 | 2902 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2903 | |
2904 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2905 | if (pos < startpos) | |
2906 | break; | |
2907 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2908 | return 1; | |
2909 | } | |
2910 | return 0; | |
2911 | } | |
2eec3b4e | 2912 | \f |
5985d248 KH |
2913 | struct sortvec |
2914 | { | |
2915 | Lisp_Object overlay; | |
d311d28c | 2916 | ptrdiff_t beg, end; |
fadf4e30 | 2917 | EMACS_INT priority; |
5985d248 KH |
2918 | }; |
2919 | ||
2920 | static int | |
d3da34e0 | 2921 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2922 | { |
dfcf069d AS |
2923 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2924 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2925 | if (s1->priority != s2->priority) |
c20998a7 | 2926 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2927 | if (s1->beg != s2->beg) |
c20998a7 | 2928 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2929 | if (s1->end != s2->end) |
c20998a7 | 2930 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
2931 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
2932 | between "equal" overlays. The result can still change between | |
2933 | invocations of Emacs, but it won't change in the middle of | |
2934 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
2935 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
2936 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
2937 | return 0; |
2938 | } | |
2939 | ||
2940 | /* Sort an array of overlays by priority. The array is modified in place. | |
2941 | The return value is the new size; this may be smaller than the original | |
2942 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2943 | ptrdiff_t |
2944 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2945 | { |
b081724f | 2946 | ptrdiff_t i, j; |
38182d90 | 2947 | struct sortvec *sortvec = alloca (noverlays * sizeof *sortvec); |
5985d248 KH |
2948 | |
2949 | /* Put the valid and relevant overlays into sortvec. */ | |
2950 | ||
2951 | for (i = 0, j = 0; i < noverlays; i++) | |
2952 | { | |
0fa767e7 | 2953 | Lisp_Object tem; |
c99fc30f | 2954 | Lisp_Object overlay; |
5985d248 | 2955 | |
c99fc30f | 2956 | overlay = overlay_vec[i]; |
22657b40 | 2957 | if (OVERLAYP (overlay) |
5985d248 KH |
2958 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
2959 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2960 | { | |
0fa767e7 KH |
2961 | /* If we're interested in a specific window, then ignore |
2962 | overlays that are limited to some other window. */ | |
2963 | if (w) | |
5985d248 | 2964 | { |
28545e04 | 2965 | Lisp_Object window; |
0fa767e7 KH |
2966 | |
2967 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2968 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2969 | continue; |
5985d248 | 2970 | } |
0fa767e7 KH |
2971 | |
2972 | /* This overlay is good and counts: put it into sortvec. */ | |
2973 | sortvec[j].overlay = overlay; | |
2974 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2975 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2976 | tem = Foverlay_get (overlay, Qpriority); | |
2977 | if (INTEGERP (tem)) | |
2978 | sortvec[j].priority = XINT (tem); | |
2979 | else | |
2980 | sortvec[j].priority = 0; | |
2981 | j++; | |
5985d248 KH |
2982 | } |
2983 | } | |
2984 | noverlays = j; | |
2985 | ||
2986 | /* Sort the overlays into the proper order: increasing priority. */ | |
2987 | ||
2988 | if (noverlays > 1) | |
2989 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2990 | ||
2991 | for (i = 0; i < noverlays; i++) | |
2992 | overlay_vec[i] = sortvec[i].overlay; | |
2993 | return (noverlays); | |
2994 | } | |
2995 | \f | |
bbbe9545 KH |
2996 | struct sortstr |
2997 | { | |
cb26008f | 2998 | Lisp_Object string, string2; |
93cb6be3 | 2999 | ptrdiff_t size; |
8961a454 | 3000 | EMACS_INT priority; |
bbbe9545 KH |
3001 | }; |
3002 | ||
e8185fa8 KH |
3003 | struct sortstrlist |
3004 | { | |
3005 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3006 | ptrdiff_t size; /* Allocated length of that array. */ |
3007 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3008 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3009 | }; |
3010 | ||
3011 | /* Buffers for storing information about the overlays touching a given | |
3012 | position. These could be automatic variables in overlay_strings, but | |
3013 | it's more efficient to hold onto the memory instead of repeatedly | |
3014 | allocating and freeing it. */ | |
3015 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3016 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3017 | |
3018 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3019 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3020 | |
bbbe9545 KH |
3021 | /* A comparison function suitable for passing to qsort. */ |
3022 | static int | |
d3da34e0 | 3023 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3024 | { |
3025 | struct sortstr *s1 = (struct sortstr *)as1; | |
3026 | struct sortstr *s2 = (struct sortstr *)as2; | |
3027 | if (s1->size != s2->size) | |
c20998a7 | 3028 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3029 | if (s1->priority != s2->priority) |
c20998a7 | 3030 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3031 | return 0; |
3032 | } | |
3033 | ||
e8185fa8 | 3034 | static void |
93cb6be3 PE |
3035 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3036 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3037 | { |
d311d28c | 3038 | ptrdiff_t nbytes; |
43d27a72 | 3039 | |
e8185fa8 | 3040 | if (ssl->used == ssl->size) |
0065d054 | 3041 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3042 | ssl->buf[ssl->used].string = str; |
cb26008f | 3043 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3044 | ssl->buf[ssl->used].size = size; |
3045 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3046 | ssl->used++; | |
43d27a72 | 3047 | |
4b4deea2 | 3048 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3049 | nbytes = SCHARS (str); |
43d27a72 | 3050 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3051 | nbytes = count_size_as_multibyte (SDATA (str), |
3052 | SBYTES (str)); | |
43d27a72 | 3053 | else |
d5db4077 | 3054 | nbytes = SBYTES (str); |
43d27a72 | 3055 | |
0065d054 PE |
3056 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3057 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3058 | ssl->bytes += nbytes; |
3059 | ||
cb26008f | 3060 | if (STRINGP (str2)) |
43d27a72 | 3061 | { |
4b4deea2 | 3062 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3063 | nbytes = SCHARS (str2); |
43d27a72 | 3064 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3065 | nbytes = count_size_as_multibyte (SDATA (str2), |
3066 | SBYTES (str2)); | |
43d27a72 | 3067 | else |
d5db4077 | 3068 | nbytes = SBYTES (str2); |
43d27a72 | 3069 | |
0065d054 PE |
3070 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3071 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3072 | ssl->bytes += nbytes; |
3073 | } | |
e8185fa8 | 3074 | } |
bbbe9545 KH |
3075 | |
3076 | /* Return the concatenation of the strings associated with overlays that | |
3077 | begin or end at POS, ignoring overlays that are specific to a window | |
3078 | other than W. The strings are concatenated in the appropriate order: | |
3079 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3080 | lower. Normally all of the after-strings come first, but zero-sized |
3081 | overlays have their after-strings ride along with the before-strings | |
3082 | because it would look strange to print them inside-out. | |
3083 | ||
3084 | Returns the string length, and stores the contents indirectly through | |
3085 | PSTR, if that variable is non-null. The string may be overwritten by | |
3086 | subsequent calls. */ | |
6b5d3b89 | 3087 | |
d311d28c PE |
3088 | ptrdiff_t |
3089 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3090 | { |
28545e04 | 3091 | Lisp_Object overlay, window, str; |
2410d73a | 3092 | struct Lisp_Overlay *ov; |
d311d28c | 3093 | ptrdiff_t startpos, endpos; |
4b4deea2 | 3094 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3095 | |
e8185fa8 KH |
3096 | overlay_heads.used = overlay_heads.bytes = 0; |
3097 | overlay_tails.used = overlay_tails.bytes = 0; | |
4cb3e6b3 | 3098 | for (ov = buffer_get_overlays (NULL, OV_BEFORE); ov; ov = ov->next) |
bbbe9545 | 3099 | { |
2410d73a | 3100 | XSETMISC (overlay, ov); |
c2d5b10f | 3101 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3102 | |
3103 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3104 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3105 | if (endpos < pos) | |
3106 | break; | |
3107 | if (endpos != pos && startpos != pos) | |
3108 | continue; | |
3109 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3110 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3111 | continue; |
e8185fa8 KH |
3112 | if (startpos == pos |
3113 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3114 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3115 | (startpos == endpos |
3116 | ? Foverlay_get (overlay, Qafter_string) | |
3117 | : Qnil), | |
3118 | Foverlay_get (overlay, Qpriority), | |
3119 | endpos - startpos); | |
3120 | else if (endpos == pos | |
3121 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3122 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3123 | Foverlay_get (overlay, Qpriority), |
3124 | endpos - startpos); | |
bbbe9545 | 3125 | } |
4cb3e6b3 | 3126 | for (ov = buffer_get_overlays (NULL, OV_AFTER); ov; ov = ov->next) |
bbbe9545 | 3127 | { |
2410d73a SM |
3128 | XSETMISC (overlay, ov); |
3129 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3130 | |
3131 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3132 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3133 | if (startpos > pos) | |
3134 | break; | |
e8185fa8 KH |
3135 | if (endpos != pos && startpos != pos) |
3136 | continue; | |
3137 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3138 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3139 | continue; |
e8185fa8 KH |
3140 | if (startpos == pos |
3141 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3142 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3143 | (startpos == endpos |
3144 | ? Foverlay_get (overlay, Qafter_string) | |
3145 | : Qnil), | |
3146 | Foverlay_get (overlay, Qpriority), | |
3147 | endpos - startpos); | |
3148 | else if (endpos == pos | |
3149 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3150 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3151 | Foverlay_get (overlay, Qpriority), |
3152 | endpos - startpos); | |
bbbe9545 | 3153 | } |
e8185fa8 KH |
3154 | if (overlay_tails.used > 1) |
3155 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3156 | cmp_for_strings); | |
3157 | if (overlay_heads.used > 1) | |
3158 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3159 | cmp_for_strings); | |
3160 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3161 | { |
e8185fa8 | 3162 | Lisp_Object tem; |
d311d28c | 3163 | ptrdiff_t i; |
9f4d7cde | 3164 | unsigned char *p; |
0065d054 | 3165 | ptrdiff_t total; |
bbbe9545 | 3166 | |
0065d054 PE |
3167 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3168 | memory_full (SIZE_MAX); | |
3169 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3170 | if (total > overlay_str_len) |
0065d054 PE |
3171 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3172 | total - overlay_str_len, -1, 1); | |
3173 | ||
bbbe9545 | 3174 | p = overlay_str_buf; |
e8185fa8 | 3175 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3176 | { |
d311d28c | 3177 | ptrdiff_t nbytes; |
e8185fa8 | 3178 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3179 | nbytes = copy_text (SDATA (tem), p, |
3180 | SBYTES (tem), | |
43d27a72 RS |
3181 | STRING_MULTIBYTE (tem), multibyte); |
3182 | p += nbytes; | |
bbbe9545 | 3183 | } |
e8185fa8 | 3184 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3185 | { |
d311d28c | 3186 | ptrdiff_t nbytes; |
e8185fa8 | 3187 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3188 | nbytes = copy_text (SDATA (tem), p, |
3189 | SBYTES (tem), | |
43d27a72 RS |
3190 | STRING_MULTIBYTE (tem), multibyte); |
3191 | p += nbytes; | |
cb26008f KH |
3192 | tem = overlay_heads.buf[i].string2; |
3193 | if (STRINGP (tem)) | |
3194 | { | |
d5db4077 KR |
3195 | nbytes = copy_text (SDATA (tem), p, |
3196 | SBYTES (tem), | |
43d27a72 RS |
3197 | STRING_MULTIBYTE (tem), multibyte); |
3198 | p += nbytes; | |
cb26008f | 3199 | } |
bbbe9545 | 3200 | } |
cb26008f KH |
3201 | if (p != overlay_str_buf + total) |
3202 | abort (); | |
bbbe9545 KH |
3203 | if (pstr) |
3204 | *pstr = overlay_str_buf; | |
e8185fa8 | 3205 | return total; |
bbbe9545 | 3206 | } |
e8185fa8 | 3207 | return 0; |
bbbe9545 KH |
3208 | } |
3209 | \f | |
5c4f68f1 | 3210 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3211 | |
2eec3b4e | 3212 | void |
d311d28c | 3213 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3214 | { |
2410d73a SM |
3215 | Lisp_Object overlay, beg, end; |
3216 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3217 | |
3218 | /* See if anything in overlays_before should move to overlays_after. */ | |
3219 | ||
3220 | /* We don't strictly need prev in this loop; it should always be nil. | |
3221 | But we use it for symmetry and in case that should cease to be true | |
3222 | with some future change. */ | |
2410d73a | 3223 | prev = NULL; |
4cb3e6b3 | 3224 | for (tail = buffer_get_overlays (buf, OV_BEFORE); tail; prev = tail, tail = next) |
1ab256cb | 3225 | { |
2410d73a SM |
3226 | next = tail->next; |
3227 | XSETMISC (overlay, tail); | |
22657b40 | 3228 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3229 | |
2eec3b4e RS |
3230 | beg = OVERLAY_START (overlay); |
3231 | end = OVERLAY_END (overlay); | |
1ab256cb | 3232 | |
2eec3b4e | 3233 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3234 | { |
2eec3b4e | 3235 | /* OVERLAY needs to be moved. */ |
d311d28c | 3236 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3237 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3238 | |
3239 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3240 | if (prev) |
3241 | prev->next = next; | |
2eec3b4e | 3242 | else |
4cb3e6b3 | 3243 | buffer_set_overlays (buf, next, OV_BEFORE); |
2eec3b4e RS |
3244 | |
3245 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3246 | other_prev = NULL; |
4cb3e6b3 | 3247 | for (other = buffer_get_overlays (buf, OV_AFTER); other; |
2410d73a | 3248 | other_prev = other, other = other->next) |
1ab256cb | 3249 | { |
6af718a4 | 3250 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3251 | |
2410d73a | 3252 | XSETMISC (otheroverlay, other); |
22657b40 | 3253 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3254 | |
3255 | otherbeg = OVERLAY_START (otheroverlay); | |
3256 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3257 | break; | |
1ab256cb | 3258 | } |
2eec3b4e RS |
3259 | |
3260 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3261 | tail->next = other; |
3262 | if (other_prev) | |
3263 | other_prev->next = tail; | |
1ab256cb | 3264 | else |
4cb3e6b3 | 3265 | buffer_set_overlays (buf, tail, OV_AFTER); |
2eec3b4e | 3266 | tail = prev; |
1ab256cb | 3267 | } |
2eec3b4e RS |
3268 | else |
3269 | /* We've reached the things that should stay in overlays_before. | |
3270 | All the rest of overlays_before must end even earlier, | |
3271 | so stop now. */ | |
3272 | break; | |
3273 | } | |
3274 | ||
3275 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3276 | prev = NULL; |
4cb3e6b3 | 3277 | for (tail = buffer_get_overlays (buf, OV_AFTER); tail; prev = tail, tail = next) |
2eec3b4e | 3278 | { |
2410d73a SM |
3279 | next = tail->next; |
3280 | XSETMISC (overlay, tail); | |
22657b40 | 3281 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3282 | |
3283 | beg = OVERLAY_START (overlay); | |
3284 | end = OVERLAY_END (overlay); | |
3285 | ||
3286 | /* Stop looking, when we know that nothing further | |
3287 | can possibly end before POS. */ | |
3288 | if (OVERLAY_POSITION (beg) > pos) | |
3289 | break; | |
3290 | ||
3291 | if (OVERLAY_POSITION (end) <= pos) | |
3292 | { | |
3293 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3294 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3295 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3296 | |
3297 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3298 | if (prev) |
3299 | prev->next = next; | |
2eec3b4e | 3300 | else |
4cb3e6b3 | 3301 | buffer_set_overlays (buf, next, OV_AFTER); |
2eec3b4e RS |
3302 | |
3303 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3304 | other_prev = NULL; |
4cb3e6b3 | 3305 | for (other = buffer_get_overlays (buf, OV_BEFORE); other; |
2410d73a | 3306 | other_prev = other, other = other->next) |
2eec3b4e RS |
3307 | { |
3308 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3309 | |
2410d73a | 3310 | XSETMISC (otheroverlay, other); |
22657b40 | 3311 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3312 | |
3313 | otherend = OVERLAY_END (otheroverlay); | |
3314 | if (OVERLAY_POSITION (otherend) <= where) | |
3315 | break; | |
3316 | } | |
3317 | ||
3318 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3319 | tail->next = other; |
3320 | if (other_prev) | |
3321 | other_prev->next = tail; | |
2eec3b4e | 3322 | else |
4cb3e6b3 | 3323 | buffer_set_overlays (buf, tail, OV_BEFORE); |
2eec3b4e RS |
3324 | tail = prev; |
3325 | } | |
3326 | } | |
3327 | ||
c2d5b10f | 3328 | buf->overlay_center = pos; |
2eec3b4e | 3329 | } |
2b1bdf65 | 3330 | |
423cdb46 | 3331 | void |
d311d28c | 3332 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3333 | { |
3334 | /* After an insertion, the lists are still sorted properly, | |
3335 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3336 | if (current_buffer->overlay_center >= pos) |
3337 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3338 | } |
3339 | ||
3340 | void | |
d311d28c | 3341 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3342 | { |
c2d5b10f | 3343 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3344 | /* The deletion was to our right. No change needed; the before- and |
3345 | after-lists are still consistent. */ | |
3346 | ; | |
d311d28c | 3347 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3348 | /* The deletion was to our left. We need to adjust the center value |
3349 | to account for the change in position, but the lists are consistent | |
3350 | given the new value. */ | |
c2d5b10f | 3351 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3352 | else |
3353 | /* We're right in the middle. There might be things on the after-list | |
3354 | that now belong on the before-list. Recentering will move them, | |
3355 | and also update the center point. */ | |
3356 | recenter_overlay_lists (current_buffer, pos); | |
3357 | } | |
3358 | ||
2b1bdf65 KH |
3359 | /* Fix up overlays that were garbled as a result of permuting markers |
3360 | in the range START through END. Any overlay with at least one | |
3361 | endpoint in this range will need to be unlinked from the overlay | |
3362 | list and reinserted in its proper place. | |
3363 | Such an overlay might even have negative size at this point. | |
6b61353c | 3364 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3365 | void |
d311d28c | 3366 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3367 | { |
6af718a4 | 3368 | Lisp_Object overlay; |
5df8f01b PE |
3369 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3370 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3371 | /* These are either nil, indicating that before_list or after_list |
3372 | should be assigned, or the cons cell the cdr of which should be | |
3373 | assigned. */ | |
2410d73a | 3374 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3375 | /* 'Parent', likewise, indicates a cons cell or |
4cb3e6b3 | 3376 | before or after overlays list, depending |
1138e742 | 3377 | which loop we're in. */ |
2410d73a | 3378 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3379 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3380 | |
3381 | /* This algorithm shifts links around instead of consing and GCing. | |
3382 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3383 | well-formed list except that its last element, the CDR of beforep |
3384 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3385 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3386 | that before_list isn't initialized, although it may look | |
3387 | strange. */ | |
4cb3e6b3 | 3388 | for (parent = NULL, tail = buffer_get_overlays (NULL, OV_BEFORE); tail;) |
2b1bdf65 | 3389 | { |
2410d73a | 3390 | XSETMISC (overlay, tail); |
6b61353c | 3391 | |
2b1bdf65 | 3392 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3393 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3394 | ||
3395 | /* If the overlay is backwards, make it empty. */ | |
3396 | if (endpos < startpos) | |
3397 | { | |
3398 | startpos = endpos; | |
3399 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3400 | Qnil); | |
3401 | } | |
3402 | ||
2b1bdf65 KH |
3403 | if (endpos < start) |
3404 | break; | |
60ebfdf3 | 3405 | |
2b1bdf65 KH |
3406 | if (endpos < end |
3407 | || (startpos >= start && startpos < end)) | |
3408 | { | |
2b1bdf65 KH |
3409 | /* Add it to the end of the wrong list. Later on, |
3410 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3411 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3412 | { |
2410d73a | 3413 | if (!afterp) |
1138e742 KR |
3414 | after_list = tail; |
3415 | else | |
2410d73a | 3416 | afterp->next = tail; |
1138e742 | 3417 | afterp = tail; |
2b1bdf65 KH |
3418 | } |
3419 | else | |
3420 | { | |
2410d73a | 3421 | if (!beforep) |
1138e742 KR |
3422 | before_list = tail; |
3423 | else | |
2410d73a | 3424 | beforep->next = tail; |
1138e742 | 3425 | beforep = tail; |
2b1bdf65 | 3426 | } |
2410d73a | 3427 | if (!parent) |
4cb3e6b3 | 3428 | buffer_set_overlays (NULL, tail->next, OV_BEFORE); |
1138e742 | 3429 | else |
2410d73a SM |
3430 | parent->next = tail->next; |
3431 | tail = tail->next; | |
2b1bdf65 KH |
3432 | } |
3433 | else | |
2410d73a | 3434 | parent = tail, tail = parent->next; |
2b1bdf65 | 3435 | } |
4cb3e6b3 | 3436 | for (parent = NULL, tail = buffer_get_overlays (NULL, OV_AFTER); tail;) |
2b1bdf65 | 3437 | { |
2410d73a | 3438 | XSETMISC (overlay, tail); |
6b61353c | 3439 | |
2b1bdf65 | 3440 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3441 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3442 | ||
3443 | /* If the overlay is backwards, make it empty. */ | |
3444 | if (endpos < startpos) | |
3445 | { | |
3446 | startpos = endpos; | |
3447 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3448 | Qnil); |
6b61353c KH |
3449 | } |
3450 | ||
2b1bdf65 KH |
3451 | if (startpos >= end) |
3452 | break; | |
6b61353c | 3453 | |
2b1bdf65 KH |
3454 | if (startpos >= start |
3455 | || (endpos >= start && endpos < end)) | |
3456 | { | |
c2d5b10f | 3457 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3458 | { |
2410d73a | 3459 | if (!afterp) |
1138e742 KR |
3460 | after_list = tail; |
3461 | else | |
2410d73a | 3462 | afterp->next = tail; |
1138e742 | 3463 | afterp = tail; |
2b1bdf65 KH |
3464 | } |
3465 | else | |
3466 | { | |
2410d73a | 3467 | if (!beforep) |
1138e742 KR |
3468 | before_list = tail; |
3469 | else | |
2410d73a | 3470 | beforep->next = tail; |
1138e742 | 3471 | beforep = tail; |
2b1bdf65 | 3472 | } |
2410d73a | 3473 | if (!parent) |
4cb3e6b3 | 3474 | buffer_set_overlays (NULL, tail->next, OV_AFTER); |
1138e742 | 3475 | else |
2410d73a SM |
3476 | parent->next = tail->next; |
3477 | tail = tail->next; | |
2b1bdf65 KH |
3478 | } |
3479 | else | |
2410d73a | 3480 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3481 | } |
3482 | ||
3483 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3484 | and let the recenter function make it sane again. */ | |
2410d73a | 3485 | if (beforep) |
1138e742 | 3486 | { |
4cb3e6b3 DA |
3487 | beforep->next = buffer_get_overlays (NULL, OV_BEFORE); |
3488 | buffer_set_overlays (NULL, before_list, OV_BEFORE); | |
1138e742 | 3489 | } |
c2d5b10f | 3490 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3491 | |
2410d73a | 3492 | if (afterp) |
1138e742 | 3493 | { |
4cb3e6b3 DA |
3494 | afterp->next = buffer_get_overlays (NULL, OV_AFTER); |
3495 | buffer_set_overlays (NULL, after_list, OV_AFTER); | |
1138e742 | 3496 | } |
c2d5b10f | 3497 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3498 | } |
3b06f880 KH |
3499 | |
3500 | /* We have two types of overlay: the one whose ending marker is | |
3501 | after-insertion-marker (this is the usual case) and the one whose | |
3502 | ending marker is before-insertion-marker. When `overlays_before' | |
3503 | contains overlays of the latter type and the former type in this | |
3504 | order and both overlays end at inserting position, inserting a text | |
3505 | increases only the ending marker of the latter type, which results | |
3506 | in incorrect ordering of `overlays_before'. | |
3507 | ||
3508 | This function fixes ordering of overlays in the slot | |
3509 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3510 | was at PREV, and now is at POS. */ | |
3511 | ||
01136e9b | 3512 | void |
d311d28c | 3513 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3514 | { |
2410d73a | 3515 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
4cb3e6b3 DA |
3516 | struct Lisp_Overlay *tail = buffer_get_overlays (bp, OV_BEFORE); |
3517 | struct Lisp_Overlay *parent = NULL, *right_pair; | |
2410d73a | 3518 | Lisp_Object tem; |
d311d28c | 3519 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3520 | |
3521 | /* After the insertion, the several overlays may be in incorrect | |
3522 | order. The possibility is that, in the list `overlays_before', | |
3523 | an overlay which ends at POS appears after an overlay which ends | |
3524 | at PREV. Since POS is greater than PREV, we must fix the | |
3525 | ordering of these overlays, by moving overlays ends at POS before | |
3526 | the overlays ends at PREV. */ | |
3527 | ||
3528 | /* At first, find a place where disordered overlays should be linked | |
3529 | in. It is where an overlay which end before POS exists. (i.e. an | |
3530 | overlay whose ending marker is after-insertion-marker if disorder | |
3531 | exists). */ | |
2410d73a SM |
3532 | while (tail |
3533 | && (XSETMISC (tem, tail), | |
3534 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3535 | { |
3536 | parent = tail; | |
2410d73a | 3537 | tail = tail->next; |
1138e742 | 3538 | } |
3b06f880 KH |
3539 | |
3540 | /* If we don't find such an overlay, | |
3541 | or the found one ends before PREV, | |
3542 | or the found one is the last one in the list, | |
3543 | we don't have to fix anything. */ | |
f93ad4cf | 3544 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3545 | return; |
3546 | ||
1138e742 KR |
3547 | right_pair = parent; |
3548 | parent = tail; | |
2410d73a | 3549 | tail = tail->next; |
3b06f880 | 3550 | |
1138e742 | 3551 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3552 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3553 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3554 | we found an overlay which ends before PREV, the remaining | |
3555 | overlays are in correct order. */ | |
2410d73a | 3556 | while (tail) |
3b06f880 | 3557 | { |
2410d73a SM |
3558 | XSETMISC (tem, tail); |
3559 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3560 | |
3561 | if (end == pos) | |
3562 | { /* This overlay is disordered. */ | |
2410d73a | 3563 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3564 | |
3565 | /* Unlink the found overlay. */ | |
2410d73a SM |
3566 | tail = found->next; |
3567 | parent->next = tail; | |
1138e742 KR |
3568 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3569 | and link it into the right place. */ | |
2410d73a | 3570 | if (!right_pair) |
1138e742 | 3571 | { |
4cb3e6b3 DA |
3572 | found->next = buffer_get_overlays (bp, OV_BEFORE); |
3573 | buffer_set_overlays (bp, found, OV_BEFORE); | |
1138e742 KR |
3574 | } |
3575 | else | |
3576 | { | |
2410d73a SM |
3577 | found->next = right_pair->next; |
3578 | right_pair->next = found; | |
1138e742 | 3579 | } |
3b06f880 KH |
3580 | } |
3581 | else if (end == prev) | |
1138e742 KR |
3582 | { |
3583 | parent = tail; | |
2410d73a | 3584 | tail = tail->next; |
1138e742 | 3585 | } |
3b06f880 KH |
3586 | else /* No more disordered overlay. */ |
3587 | break; | |
3588 | } | |
3589 | } | |
2eec3b4e | 3590 | \f |
52f8ec73 | 3591 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3592 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3593 | (Lisp_Object object) |
52f8ec73 JB |
3594 | { |
3595 | return (OVERLAYP (object) ? Qt : Qnil); | |
3596 | } | |
3597 | ||
acac2700 | 3598 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3599 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3600 | If omitted, BUFFER defaults to the current buffer. |
3601 | BEG and END may be integers or markers. | |
a625ee20 RS |
3602 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3603 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3604 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3605 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3606 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3607 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3608 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3609 | { |
3610 | Lisp_Object overlay; | |
5c4f68f1 | 3611 | struct buffer *b; |
2eec3b4e | 3612 | |
5c4f68f1 | 3613 | if (NILP (buffer)) |
67180c6a | 3614 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3615 | else |
b7826503 | 3616 | CHECK_BUFFER (buffer); |
883047b9 JB |
3617 | if (MARKERP (beg) |
3618 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3619 | error ("Marker points into wrong buffer"); | |
3620 | if (MARKERP (end) | |
3621 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3622 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3623 | |
b7826503 PJ |
3624 | CHECK_NUMBER_COERCE_MARKER (beg); |
3625 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3626 | |
883047b9 | 3627 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3628 | { |
c99fc30f KH |
3629 | Lisp_Object temp; |
3630 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3631 | } |
883047b9 JB |
3632 | |
3633 | b = XBUFFER (buffer); | |
3634 | ||
3635 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3636 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3637 | |
acac2700 RS |
3638 | if (!NILP (front_advance)) |
3639 | XMARKER (beg)->insertion_type = 1; | |
3640 | if (!NILP (rear_advance)) | |
3641 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3642 | |
d7a7fda3 | 3643 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3644 | |
177c0ea7 | 3645 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3646 | end = OVERLAY_END (overlay); |
c2d5b10f | 3647 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3648 | { |
4cb3e6b3 DA |
3649 | if (buffer_get_overlays (b, OV_AFTER)) |
3650 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER); | |
3651 | buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER); | |
2410d73a | 3652 | } |
2eec3b4e | 3653 | else |
2410d73a | 3654 | { |
4cb3e6b3 DA |
3655 | if (buffer_get_overlays (b, OV_BEFORE)) |
3656 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE); | |
3657 | buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE); | |
2410d73a | 3658 | } |
2eec3b4e RS |
3659 | |
3660 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3661 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3662 | |
b61982dd JB |
3663 | /* We don't need to redisplay the region covered by the overlay, because |
3664 | the overlay has no properties at the moment. */ | |
3665 | ||
2eec3b4e RS |
3666 | return overlay; |
3667 | } | |
876aa27c RS |
3668 | \f |
3669 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3670 | ||
3671 | static void | |
d311d28c | 3672 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3673 | { |
876aa27c RS |
3674 | if (start > end) |
3675 | { | |
d311d28c | 3676 | ptrdiff_t temp = start; |
26f545d7 GM |
3677 | start = end; |
3678 | end = temp; | |
876aa27c RS |
3679 | } |
3680 | ||
481b5054 | 3681 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3682 | |
876aa27c RS |
3683 | /* If this is a buffer not in the selected window, |
3684 | we must do other windows. */ | |
d3d50620 | 3685 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) |
876aa27c | 3686 | windows_or_buffers_changed = 1; |
876aa27c RS |
3687 | /* If multiple windows show this buffer, we must do other windows. */ |
3688 | else if (buffer_shared > 1) | |
3689 | windows_or_buffers_changed = 1; | |
18700091 KS |
3690 | /* If we modify an overlay at the end of the buffer, we cannot |
3691 | be sure that window end is still valid. */ | |
3692 | else if (end >= ZV && start <= ZV) | |
3693 | windows_or_buffers_changed = 1; | |
876aa27c | 3694 | |
d8b9150f | 3695 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3696 | } |
2eec3b4e | 3697 | |
7b7ae965 DA |
3698 | /* Remove OVERLAY from LIST. */ |
3699 | ||
2410d73a | 3700 | static struct Lisp_Overlay * |
d3da34e0 | 3701 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3702 | { |
7b7ae965 DA |
3703 | register struct Lisp_Overlay *tail, **prev = &list; |
3704 | ||
3705 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3706 | if (tail == overlay) | |
2410d73a | 3707 | { |
7b7ae965 | 3708 | *prev = overlay->next; |
2410d73a SM |
3709 | overlay->next = NULL; |
3710 | break; | |
3711 | } | |
3712 | return list; | |
3713 | } | |
3714 | ||
4cb3e6b3 DA |
3715 | /* Remove OVERLAY from both overlay lists of B. */ |
3716 | ||
3717 | static void | |
3718 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3719 | { | |
3720 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3721 | ||
3722 | buffer_set_overlays | |
3723 | (b, unchain_overlay (buffer_get_overlays (b, OV_BEFORE), ov), OV_BEFORE); | |
3724 | buffer_set_overlays | |
3725 | (b, unchain_overlay (buffer_get_overlays (b, OV_AFTER), ov), OV_AFTER); | |
3726 | } | |
3727 | ||
5c4f68f1 | 3728 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3729 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3730 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3731 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3732 | buffer. */) |
5842a27b | 3733 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3734 | { |
471fe23d | 3735 | struct buffer *b, *ob = 0; |
0a4469c9 | 3736 | Lisp_Object obuffer; |
d311d28c | 3737 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3738 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3739 | |
b7826503 | 3740 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3741 | if (NILP (buffer)) |
3742 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3743 | if (NILP (buffer)) |
67180c6a | 3744 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3745 | CHECK_BUFFER (buffer); |
883047b9 | 3746 | |
471fe23d TN |
3747 | if (NILP (Fbuffer_live_p (buffer))) |
3748 | error ("Attempt to move overlay to a dead buffer"); | |
3749 | ||
883047b9 JB |
3750 | if (MARKERP (beg) |
3751 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3752 | error ("Marker points into wrong buffer"); | |
3753 | if (MARKERP (end) | |
3754 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3755 | error ("Marker points into wrong buffer"); | |
3756 | ||
b7826503 PJ |
3757 | CHECK_NUMBER_COERCE_MARKER (beg); |
3758 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3759 | |
471fe23d | 3760 | if (XINT (beg) > XINT (end)) |
02481186 | 3761 | { |
471fe23d TN |
3762 | Lisp_Object temp; |
3763 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3764 | } |
3765 | ||
9d7608b7 KH |
3766 | specbind (Qinhibit_quit, Qt); |
3767 | ||
0a4469c9 | 3768 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3769 | b = XBUFFER (buffer); |
471fe23d TN |
3770 | |
3771 | if (!NILP (obuffer)) | |
3772 | { | |
3773 | ob = XBUFFER (obuffer); | |
3774 | ||
3775 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3776 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3777 | ||
4cb3e6b3 | 3778 | unchain_both (ob, overlay); |
471fe23d TN |
3779 | eassert (XOVERLAY (overlay)->next == NULL); |
3780 | } | |
3781 | ||
3782 | /* Set the overlay boundaries, which may clip them. */ | |
3783 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3784 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3785 | ||
3786 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3787 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3788 | |
c82ed728 | 3789 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3790 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3791 | { |
3792 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3793 | if (ob) |
3794 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3795 | |
3796 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3797 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3798 | } |
c82ed728 JB |
3799 | else |
3800 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3801 | { | |
79cce3f2 PE |
3802 | if (o_beg == n_beg) |
3803 | modify_overlay (b, o_end, n_end); | |
3804 | else if (o_end == n_end) | |
3805 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 3806 | else |
79cce3f2 | 3807 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 3808 | } |
b61982dd | 3809 | |
471fe23d TN |
3810 | /* Delete the overlay if it is empty after clipping and has the |
3811 | evaporate property. */ | |
3812 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
3813 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 3814 | |
471fe23d TN |
3815 | /* Put the overlay into the new buffer's overlay lists, first on the |
3816 | wrong list. */ | |
3817 | if (n_end < b->overlay_center) | |
2410d73a | 3818 | { |
4cb3e6b3 DA |
3819 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER); |
3820 | buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER); | |
2410d73a | 3821 | } |
2eec3b4e | 3822 | else |
2410d73a | 3823 | { |
4cb3e6b3 DA |
3824 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE); |
3825 | buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE); | |
2410d73a | 3826 | } |
2eec3b4e RS |
3827 | |
3828 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3829 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3830 | |
0a4469c9 | 3831 | return unbind_to (count, overlay); |
2eec3b4e RS |
3832 | } |
3833 | ||
3834 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3835 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3836 | (Lisp_Object overlay) |
2eec3b4e | 3837 | { |
0a4469c9 | 3838 | Lisp_Object buffer; |
5c4f68f1 | 3839 | struct buffer *b; |
d311d28c | 3840 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 3841 | |
b7826503 | 3842 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3843 | |
0a4469c9 RS |
3844 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3845 | if (NILP (buffer)) | |
3846 | return Qnil; | |
3847 | ||
3848 | b = XBUFFER (buffer); | |
0a4469c9 | 3849 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3850 | |
4cb3e6b3 | 3851 | unchain_both (b, overlay); |
2410d73a | 3852 | eassert (XOVERLAY (overlay)->next == NULL); |
471fe23d | 3853 | |
041a49a6 | 3854 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 3855 | |
e58c389d | 3856 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3857 | display optimizations for the affected buffer, on the basis that |
3858 | these strings may contain newlines. This is easier to do than to | |
3859 | check for that situation during redisplay. */ | |
3860 | if (!windows_or_buffers_changed | |
3861 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3862 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3863 | b->prevent_redisplay_optimizations_p = 1; | |
3864 | ||
0a4469c9 | 3865 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3866 | } |
3867 | \f | |
8ebafa8d JB |
3868 | /* Overlay dissection functions. */ |
3869 | ||
a7ca3326 | 3870 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3871 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3872 | (Lisp_Object overlay) |
8ebafa8d | 3873 | { |
b7826503 | 3874 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3875 | |
3876 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3877 | } | |
3878 | ||
a7ca3326 | 3879 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3880 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3881 | (Lisp_Object overlay) |
8ebafa8d | 3882 | { |
b7826503 | 3883 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3884 | |
3885 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3886 | } | |
3887 | ||
3888 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3889 | doc: /* Return the buffer OVERLAY belongs to. |
3890 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3891 | (Lisp_Object overlay) |
8ebafa8d | 3892 | { |
b7826503 | 3893 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3894 | |
3895 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3896 | } | |
3897 | ||
3898 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3899 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3900 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3901 | OVERLAY. */) |
5842a27b | 3902 | (Lisp_Object overlay) |
8ebafa8d | 3903 | { |
b7826503 | 3904 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3905 | |
c644523b | 3906 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3907 | } |
3908 | ||
3909 | \f | |
2eec3b4e | 3910 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3911 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3912 | (Lisp_Object pos) |
2eec3b4e | 3913 | { |
b081724f | 3914 | ptrdiff_t len, noverlays; |
2eec3b4e | 3915 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3916 | Lisp_Object result; |
3917 | ||
b7826503 | 3918 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3919 | |
3920 | len = 10; | |
a9800ae8 | 3921 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 3922 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3923 | |
3924 | /* Put all the overlays we want in a vector in overlay_vec. | |
3925 | Store the length in len. */ | |
2a77a7d7 | 3926 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3927 | 0, 0, 0); |
2eec3b4e RS |
3928 | |
3929 | /* Make a list of them all. */ | |
3930 | result = Flist (noverlays, overlay_vec); | |
3931 | ||
9ac0d9e0 | 3932 | xfree (overlay_vec); |
2eec3b4e RS |
3933 | return result; |
3934 | } | |
3935 | ||
74514898 | 3936 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3937 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3938 | Overlap means that at least one character is contained within the overlay |
3939 | and also contained within the specified region. | |
7723e095 MR |
3940 | Empty overlays are included in the result if they are located at BEG, |
3941 | between BEG and END, or at END provided END denotes the position at the | |
3942 | end of the buffer. */) | |
5842a27b | 3943 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3944 | { |
21514da7 | 3945 | ptrdiff_t len, noverlays; |
74514898 | 3946 | Lisp_Object *overlay_vec; |
74514898 RS |
3947 | Lisp_Object result; |
3948 | ||
b7826503 PJ |
3949 | CHECK_NUMBER_COERCE_MARKER (beg); |
3950 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3951 | |
3952 | len = 10; | |
38182d90 | 3953 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
3954 | |
3955 | /* Put all the overlays we want in a vector in overlay_vec. | |
3956 | Store the length in len. */ | |
3957 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3958 | NULL, NULL); |
74514898 RS |
3959 | |
3960 | /* Make a list of them all. */ | |
3961 | result = Flist (noverlays, overlay_vec); | |
3962 | ||
3963 | xfree (overlay_vec); | |
3964 | return result; | |
3965 | } | |
3966 | ||
a7ca3326 | 3967 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3968 | 1, 1, 0, |
7ee72033 | 3969 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3970 | If there are no overlay boundaries from POS to (point-max), |
3971 | the value is (point-max). */) | |
5842a27b | 3972 | (Lisp_Object pos) |
2eec3b4e | 3973 | { |
b081724f | 3974 | ptrdiff_t i, len, noverlays; |
d311d28c | 3975 | ptrdiff_t endpos; |
2eec3b4e | 3976 | Lisp_Object *overlay_vec; |
2eec3b4e | 3977 | |
b7826503 | 3978 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3979 | |
3980 | len = 10; | |
38182d90 | 3981 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3982 | |
3983 | /* Put all the overlays we want in a vector in overlay_vec. | |
3984 | Store the length in len. | |
3985 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3986 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3987 | &endpos, 0, 1); |
2eec3b4e RS |
3988 | |
3989 | /* If any of these overlays ends before endpos, | |
3990 | use its ending point instead. */ | |
3991 | for (i = 0; i < noverlays; i++) | |
3992 | { | |
3993 | Lisp_Object oend; | |
d311d28c | 3994 | ptrdiff_t oendpos; |
2eec3b4e RS |
3995 | |
3996 | oend = OVERLAY_END (overlay_vec[i]); | |
3997 | oendpos = OVERLAY_POSITION (oend); | |
3998 | if (oendpos < endpos) | |
3999 | endpos = oendpos; | |
1ab256cb RM |
4000 | } |
4001 | ||
9ac0d9e0 | 4002 | xfree (overlay_vec); |
2eec3b4e RS |
4003 | return make_number (endpos); |
4004 | } | |
239c932b | 4005 | |
a7ca3326 | 4006 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4007 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4008 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4009 | If there are no overlay boundaries from (point-min) to POS, |
4010 | the value is (point-min). */) | |
5842a27b | 4011 | (Lisp_Object pos) |
239c932b | 4012 | { |
d311d28c | 4013 | ptrdiff_t prevpos; |
239c932b | 4014 | Lisp_Object *overlay_vec; |
b081724f | 4015 | ptrdiff_t len; |
239c932b | 4016 | |
b7826503 | 4017 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4018 | |
624bbdc4 RS |
4019 | /* At beginning of buffer, we know the answer; |
4020 | avoid bug subtracting 1 below. */ | |
4021 | if (XINT (pos) == BEGV) | |
4022 | return pos; | |
4023 | ||
017f0539 | 4024 | len = 10; |
38182d90 | 4025 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4026 | |
239c932b RS |
4027 | /* Put all the overlays we want in a vector in overlay_vec. |
4028 | Store the length in len. | |
daa1c109 | 4029 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4030 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4031 | 0, &prevpos, 1); |
239c932b | 4032 | |
239c932b RS |
4033 | xfree (overlay_vec); |
4034 | return make_number (prevpos); | |
4035 | } | |
2eec3b4e RS |
4036 | \f |
4037 | /* These functions are for debugging overlays. */ | |
4038 | ||
4039 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4040 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4041 | The car has all the overlays before the overlay center; |
4042 | the cdr has all the overlays after the overlay center. | |
4043 | Recentering overlays moves overlays between these lists. | |
4044 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4045 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4046 | (void) |
2eec3b4e | 4047 | { |
2410d73a SM |
4048 | struct Lisp_Overlay *ol; |
4049 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 DA |
4050 | |
4051 | for (ol = buffer_get_overlays (NULL, OV_BEFORE); ol; ol = ol->next) | |
2410d73a SM |
4052 | { |
4053 | XSETMISC (tmp, ol); | |
4054 | before = Fcons (tmp, before); | |
4055 | } | |
4cb3e6b3 DA |
4056 | |
4057 | for (ol = buffer_get_overlays (NULL, OV_AFTER); ol; ol = ol->next) | |
2410d73a SM |
4058 | { |
4059 | XSETMISC (tmp, ol); | |
4060 | after = Fcons (tmp, after); | |
4061 | } | |
4cb3e6b3 | 4062 | |
2410d73a | 4063 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4064 | } |
4065 | ||
4066 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4067 | doc: /* Recenter the overlays of the current buffer around position POS. |
4068 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4069 | for positions far away from POS). */) | |
5842a27b | 4070 | (Lisp_Object pos) |
2eec3b4e | 4071 | { |
d311d28c | 4072 | ptrdiff_t p; |
b7826503 | 4073 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4074 | |
d311d28c PE |
4075 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4076 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4077 | return Qnil; |
4078 | } | |
4079 | \f | |
a7ca3326 | 4080 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4081 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4082 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4083 | { |
b7826503 | 4084 | CHECK_OVERLAY (overlay); |
c644523b | 4085 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4086 | } |
4087 | ||
4088 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4089 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4090 | VALUE will be returned.*/) | |
5842a27b | 4091 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4092 | { |
48e2e3ba | 4093 | Lisp_Object tail, buffer; |
9d7608b7 | 4094 | int changed; |
2eec3b4e | 4095 | |
b7826503 | 4096 | CHECK_OVERLAY (overlay); |
b61982dd | 4097 | |
274a9425 RS |
4098 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4099 | ||
c644523b | 4100 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4101 | CONSP (tail) && CONSP (XCDR (tail)); |
4102 | tail = XCDR (XCDR (tail))) | |
4103 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4104 | { |
7539e11f | 4105 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4106 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4107 | goto found; |
274a9425 | 4108 | } |
9d7608b7 KH |
4109 | /* It wasn't in the list, so add it to the front. */ |
4110 | changed = !NILP (value); | |
c644523b DA |
4111 | set_overlay_plist |
4112 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4113 | found: |
4114 | if (! NILP (buffer)) | |
4115 | { | |
4116 | if (changed) | |
876aa27c | 4117 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4118 | marker_position (OVERLAY_START (overlay)), |
4119 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4120 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4121 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4122 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4123 | Fdelete_overlay (overlay); | |
4124 | } | |
7d63db98 | 4125 | |
2eec3b4e | 4126 | return value; |
1ab256cb RM |
4127 | } |
4128 | \f | |
9115729e KH |
4129 | /* Subroutine of report_overlay_modification. */ |
4130 | ||
4131 | /* Lisp vector holding overlay hook functions to call. | |
4132 | Vector elements come in pairs. | |
4133 | Each even-index element is a list of hook functions. | |
4134 | The following odd-index element is the overlay they came from. | |
4135 | ||
4136 | Before the buffer change, we fill in this vector | |
4137 | as we call overlay hook functions. | |
4138 | After the buffer change, we get the functions to call from this vector. | |
4139 | This way we always call the same functions before and after the change. */ | |
4140 | static Lisp_Object last_overlay_modification_hooks; | |
4141 | ||
4142 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4143 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4144 | |
4145 | /* Add one functionlist/overlay pair | |
4146 | to the end of last_overlay_modification_hooks. */ | |
4147 | ||
4148 | static void | |
d3da34e0 | 4149 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4150 | { |
d311d28c | 4151 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4152 | |
d311d28c PE |
4153 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4154 | last_overlay_modification_hooks = | |
4155 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4156 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4157 | functionlist); last_overlay_modification_hooks_used++; | |
4158 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4159 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4160 | } |
4161 | \f | |
173f2a64 RS |
4162 | /* Run the modification-hooks of overlays that include |
4163 | any part of the text in START to END. | |
9115729e KH |
4164 | If this change is an insertion, also |
4165 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4166 | and the insert-after-hooks of overlay ending at START. |
4167 | ||
4168 | This is called both before and after the modification. | |
4169 | AFTER is nonzero when we call after the modification. | |
4170 | ||
9115729e KH |
4171 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4172 | When AFTER is nonzero, they are the start position, | |
4173 | the position after the inserted new text, | |
4174 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4175 | |
4176 | void | |
d3da34e0 JB |
4177 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4178 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4179 | { |
2410d73a SM |
4180 | Lisp_Object prop, overlay; |
4181 | struct Lisp_Overlay *tail; | |
9115729e KH |
4182 | /* 1 if this change is an insertion. */ |
4183 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4184 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4185 | |
4186 | overlay = Qnil; | |
2410d73a | 4187 | tail = NULL; |
9115729e | 4188 | |
27c6b98e SM |
4189 | /* We used to run the functions as soon as we found them and only register |
4190 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4191 | case. But running elisp code as we traverse the list of overlays is | |
4192 | painful because the list can be modified by the elisp code so we had to | |
4193 | copy at several places. We now simply do a read-only traversal that | |
4194 | only collects the functions to run and we run them afterwards. It's | |
4195 | simpler, especially since all the code was already there. -stef */ | |
4196 | ||
a615c6dc | 4197 | if (!after) |
173f2a64 | 4198 | { |
a615c6dc SM |
4199 | /* We are being called before a change. |
4200 | Scan the overlays to find the functions to call. */ | |
4201 | last_overlay_modification_hooks_used = 0; | |
4cb3e6b3 | 4202 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
173f2a64 | 4203 | { |
d311d28c | 4204 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4205 | Lisp_Object ostart, oend; |
4206 | ||
2410d73a | 4207 | XSETMISC (overlay, tail); |
a615c6dc SM |
4208 | |
4209 | ostart = OVERLAY_START (overlay); | |
4210 | oend = OVERLAY_END (overlay); | |
4211 | endpos = OVERLAY_POSITION (oend); | |
4212 | if (XFASTINT (start) > endpos) | |
4213 | break; | |
4214 | startpos = OVERLAY_POSITION (ostart); | |
4215 | if (insertion && (XFASTINT (start) == startpos | |
4216 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4217 | { |
a615c6dc SM |
4218 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4219 | if (!NILP (prop)) | |
4220 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4221 | } |
a615c6dc SM |
4222 | if (insertion && (XFASTINT (start) == endpos |
4223 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4224 | { |
a615c6dc SM |
4225 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4226 | if (!NILP (prop)) | |
4227 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4228 | } |
a615c6dc SM |
4229 | /* Test for intersecting intervals. This does the right thing |
4230 | for both insertion and deletion. */ | |
4231 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4232 | { |
a615c6dc SM |
4233 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4234 | if (!NILP (prop)) | |
4235 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4236 | } |
173f2a64 | 4237 | } |
60ebfdf3 | 4238 | |
4cb3e6b3 | 4239 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
173f2a64 | 4240 | { |
d311d28c | 4241 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4242 | Lisp_Object ostart, oend; |
4243 | ||
2410d73a | 4244 | XSETMISC (overlay, tail); |
a615c6dc SM |
4245 | |
4246 | ostart = OVERLAY_START (overlay); | |
4247 | oend = OVERLAY_END (overlay); | |
4248 | startpos = OVERLAY_POSITION (ostart); | |
4249 | endpos = OVERLAY_POSITION (oend); | |
4250 | if (XFASTINT (end) < startpos) | |
4251 | break; | |
4252 | if (insertion && (XFASTINT (start) == startpos | |
4253 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4254 | { |
a615c6dc SM |
4255 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4256 | if (!NILP (prop)) | |
4257 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4258 | } |
a615c6dc SM |
4259 | if (insertion && (XFASTINT (start) == endpos |
4260 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4261 | { |
a615c6dc SM |
4262 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4263 | if (!NILP (prop)) | |
4264 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4265 | } |
a615c6dc SM |
4266 | /* Test for intersecting intervals. This does the right thing |
4267 | for both insertion and deletion. */ | |
4268 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4269 | { |
a615c6dc SM |
4270 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4271 | if (!NILP (prop)) | |
4272 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4273 | } |
173f2a64 RS |
4274 | } |
4275 | } | |
55b48893 | 4276 | |
a615c6dc SM |
4277 | GCPRO4 (overlay, arg1, arg2, arg3); |
4278 | { | |
4279 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4280 | First copy the vector contents, in case some of these hooks | |
4281 | do subsequent modification of the buffer. */ | |
d311d28c | 4282 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4283 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4284 | ptrdiff_t i; |
a615c6dc | 4285 | |
72af86bd | 4286 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4287 | size * word_size); |
a615c6dc SM |
4288 | gcpro1.var = copy; |
4289 | gcpro1.nvars = size; | |
4290 | ||
4291 | for (i = 0; i < size;) | |
4292 | { | |
8f54f30a PE |
4293 | Lisp_Object prop_i, overlay_i; |
4294 | prop_i = copy[i++]; | |
4295 | overlay_i = copy[i++]; | |
4296 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4297 | } |
4298 | } | |
55b48893 | 4299 | UNGCPRO; |
173f2a64 RS |
4300 | } |
4301 | ||
4302 | static void | |
d3da34e0 JB |
4303 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4304 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4305 | { |
930a9140 | 4306 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4307 | |
930a9140 | 4308 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4309 | |
6d70a280 | 4310 | while (CONSP (list)) |
173f2a64 | 4311 | { |
930a9140 | 4312 | if (NILP (arg3)) |
6d70a280 | 4313 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4314 | else |
6d70a280 SM |
4315 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4316 | list = XCDR (list); | |
173f2a64 RS |
4317 | } |
4318 | UNGCPRO; | |
4319 | } | |
9d7608b7 KH |
4320 | |
4321 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4322 | property is set. */ | |
4323 | void | |
d311d28c | 4324 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4325 | { |
2410d73a SM |
4326 | Lisp_Object overlay, hit_list; |
4327 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4328 | |
4329 | hit_list = Qnil; | |
c2d5b10f | 4330 | if (pos <= current_buffer->overlay_center) |
4cb3e6b3 | 4331 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
9d7608b7 | 4332 | { |
d311d28c | 4333 | ptrdiff_t endpos; |
2410d73a | 4334 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4335 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4336 | if (endpos < pos) | |
4337 | break; | |
4338 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4339 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4340 | hit_list = Fcons (overlay, hit_list); |
4341 | } | |
4342 | else | |
4cb3e6b3 | 4343 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
9d7608b7 | 4344 | { |
d311d28c | 4345 | ptrdiff_t startpos; |
2410d73a | 4346 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4347 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4348 | if (startpos > pos) | |
4349 | break; | |
4350 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4351 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4352 | hit_list = Fcons (overlay, hit_list); |
4353 | } | |
7539e11f KR |
4354 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4355 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4356 | } |
173f2a64 | 4357 | \f |
54dfdeb0 | 4358 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4359 | in the slot with offset OFFSET. */ |
4360 | ||
0fa3ba92 | 4361 | void |
d3da34e0 | 4362 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4363 | { |
ad97b375 | 4364 | Lisp_Object predicate; |
177c0ea7 | 4365 | |
64e16c3c | 4366 | switch (type) |
0fa3ba92 | 4367 | { |
2de9f71c | 4368 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4369 | case Lisp_String: predicate = Qstringp; break; |
4370 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4371 | default: abort (); | |
0fa3ba92 JB |
4372 | } |
4373 | ||
ad97b375 | 4374 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4375 | } |
7c02e886 | 4376 | |
0fa3ba92 | 4377 | \f |
b86af064 GM |
4378 | /*********************************************************************** |
4379 | Allocation with mmap | |
4380 | ***********************************************************************/ | |
4381 | ||
4382 | #ifdef USE_MMAP_FOR_BUFFERS | |
4383 | ||
4384 | #include <sys/types.h> | |
4385 | #include <sys/mman.h> | |
4386 | ||
4387 | #ifndef MAP_ANON | |
4388 | #ifdef MAP_ANONYMOUS | |
4389 | #define MAP_ANON MAP_ANONYMOUS | |
4390 | #else | |
4391 | #define MAP_ANON 0 | |
4392 | #endif | |
4393 | #endif | |
4394 | ||
09dfdf85 GM |
4395 | #ifndef MAP_FAILED |
4396 | #define MAP_FAILED ((void *) -1) | |
4397 | #endif | |
4398 | ||
b86af064 | 4399 | #include <stdio.h> |
b86af064 GM |
4400 | |
4401 | #if MAP_ANON == 0 | |
4402 | #include <fcntl.h> | |
4403 | #endif | |
4404 | ||
4405 | #include "coding.h" | |
4406 | ||
4407 | ||
4408 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4409 | The current implementation lets the system select mapped | |
4410 | addresses; we're not using MAP_FIXED in general, except when | |
4411 | trying to enlarge regions. | |
4412 | ||
4413 | Each mapped region starts with a mmap_region structure, the user | |
4414 | area starts after that structure, aligned to MEM_ALIGN. | |
4415 | ||
4416 | +-----------------------+ | |
4417 | | struct mmap_info + | | |
4418 | | padding | | |
4419 | +-----------------------+ | |
4420 | | user data | | |
4421 | | | | |
4422 | | | | |
4423 | +-----------------------+ */ | |
4424 | ||
4425 | struct mmap_region | |
4426 | { | |
4427 | /* User-specified size. */ | |
4428 | size_t nbytes_specified; | |
177c0ea7 | 4429 | |
b86af064 GM |
4430 | /* Number of bytes mapped */ |
4431 | size_t nbytes_mapped; | |
4432 | ||
4433 | /* Pointer to the location holding the address of the memory | |
4434 | allocated with the mmap'd block. The variable actually points | |
4435 | after this structure. */ | |
261cb4bb | 4436 | void **var; |
b86af064 GM |
4437 | |
4438 | /* Next and previous in list of all mmap'd regions. */ | |
4439 | struct mmap_region *next, *prev; | |
4440 | }; | |
4441 | ||
4442 | /* Doubly-linked list of mmap'd regions. */ | |
4443 | ||
4444 | static struct mmap_region *mmap_regions; | |
4445 | ||
4446 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4447 | /dev/zero will be opened on it. */ | |
4448 | ||
4449 | static int mmap_fd; | |
4450 | ||
4451 | /* Temporary storage for mmap_set_vars, see there. */ | |
4452 | ||
4453 | static struct mmap_region *mmap_regions_1; | |
4454 | static int mmap_fd_1; | |
4455 | ||
4456 | /* Page size on this system. */ | |
4457 | ||
4458 | static int mmap_page_size; | |
4459 | ||
cd1181db | 4460 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4461 | |
4462 | static int mmap_initialized_p; | |
4463 | ||
4464 | /* Value is X rounded up to the next multiple of N. */ | |
4465 | ||
4466 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4467 | ||
4468 | /* Size of mmap_region structure plus padding. */ | |
4469 | ||
4470 | #define MMAP_REGION_STRUCT_SIZE \ | |
4471 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4472 | ||
4473 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4474 | region, return a pointer to the start of the region. */ | |
4475 | ||
4476 | #define MMAP_REGION(P) \ | |
4477 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4478 | ||
4479 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4480 | to the start of the user-visible part of the region. */ | |
4481 | ||
4482 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4483 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4484 | |
4485 | #define MEM_ALIGN sizeof (double) | |
4486 | ||
7273faa1 DL |
4487 | /* Predicate returning true if part of the address range [START .. END] |
4488 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4489 | memory mapping. |
4490 | ||
da6062e6 | 4491 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4492 | something else. This can be overridden by system configuration |
4493 | files if system-specific means to determine this exists. */ | |
4494 | ||
4495 | #ifndef MMAP_ALLOCATED_P | |
4496 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4497 | #endif | |
4498 | ||
53964682 | 4499 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4500 | |
1dae0f0a AS |
4501 | static void |
4502 | mmap_init (void) | |
4503 | { | |
4504 | #if MAP_ANON == 0 | |
4505 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4506 | in a dumped Emacs. */ | |
4507 | if (mmap_fd <= 0) | |
4508 | { | |
4509 | /* No anonymous mmap -- we need the file descriptor. */ | |
4510 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4511 | if (mmap_fd == -1) | |
4512 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4513 | } | |
4514 | #endif /* MAP_ANON == 0 */ | |
4515 | ||
4516 | if (mmap_initialized_p) | |
4517 | return; | |
4518 | mmap_initialized_p = 1; | |
b86af064 | 4519 | |
1dae0f0a AS |
4520 | #if MAP_ANON != 0 |
4521 | mmap_fd = -1; | |
4522 | #endif | |
4523 | ||
4524 | mmap_page_size = getpagesize (); | |
4525 | } | |
b86af064 GM |
4526 | |
4527 | /* Return a region overlapping address range START...END, or null if | |
4528 | none. END is not including, i.e. the last byte in the range | |
4529 | is at END - 1. */ | |
4530 | ||
4531 | static struct mmap_region * | |
261cb4bb | 4532 | mmap_find (void *start, void *end) |
b86af064 GM |
4533 | { |
4534 | struct mmap_region *r; | |
4535 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4536 | |
b86af064 GM |
4537 | for (r = mmap_regions; r; r = r->next) |
4538 | { | |
4539 | char *rstart = (char *) r; | |
4540 | char *rend = rstart + r->nbytes_mapped; | |
4541 | ||
4542 | if (/* First byte of range, i.e. START, in this region? */ | |
4543 | (s >= rstart && s < rend) | |
4544 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4545 | || (e > rstart && e <= rend) | |
4546 | /* First byte of this region in the range? */ | |
4547 | || (rstart >= s && rstart < e) | |
4548 | /* Last byte of this region in the range? */ | |
4549 | || (rend > s && rend <= e)) | |
4550 | break; | |
4551 | } | |
4552 | ||
4553 | return r; | |
4554 | } | |
4555 | ||
4556 | ||
4557 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4558 | the region. Value is non-zero if successful. */ | |
4559 | ||
4560 | static int | |
1dae0f0a | 4561 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4562 | { |
4563 | if (r->next) | |
4564 | r->next->prev = r->prev; | |
4565 | if (r->prev) | |
4566 | r->prev->next = r->next; | |
4567 | else | |
4568 | mmap_regions = r->next; | |
177c0ea7 | 4569 | |
261cb4bb | 4570 | if (munmap (r, r->nbytes_mapped) == -1) |
b86af064 GM |
4571 | { |
4572 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4573 | return 0; | |
4574 | } | |
4575 | ||
4576 | return 1; | |
4577 | } | |
4578 | ||
4579 | ||
4580 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4581 | Value is non-zero if successful. */ | |
4582 | ||
4583 | static int | |
1dae0f0a | 4584 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4585 | { |
4586 | char *region_end = (char *) r + r->nbytes_mapped; | |
4587 | size_t nbytes; | |
4588 | int success = 0; | |
4589 | ||
4590 | if (npages < 0) | |
4591 | { | |
4592 | /* Unmap pages at the end of the region. */ | |
4593 | nbytes = - npages * mmap_page_size; | |
4594 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4595 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4596 | else | |
4597 | { | |
4598 | r->nbytes_mapped -= nbytes; | |
4599 | success = 1; | |
4600 | } | |
4601 | } | |
4602 | else if (npages > 0) | |
4603 | { | |
b86af064 | 4604 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4605 | |
b86af064 GM |
4606 | /* Try to map additional pages at the end of the region. We |
4607 | cannot do this if the address range is already occupied by | |
4608 | something else because mmap deletes any previous mapping. | |
4609 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4610 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4611 | { |
261cb4bb | 4612 | void *p; |
177c0ea7 | 4613 | |
b86af064 GM |
4614 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4615 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4616 | if (p == MAP_FAILED) | |
edaa9aed | 4617 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4618 | else if (p != region_end) |
b86af064 GM |
4619 | { |
4620 | /* Kernels are free to choose a different address. In | |
4621 | that case, unmap what we've mapped above; we have | |
4622 | no use for it. */ | |
4623 | if (munmap (p, nbytes) == -1) | |
4624 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4625 | } | |
4626 | else | |
4627 | { | |
4628 | r->nbytes_mapped += nbytes; | |
4629 | success = 1; | |
4630 | } | |
4631 | } | |
4632 | } | |
4633 | ||
4634 | return success; | |
4635 | } | |
4636 | ||
4637 | ||
4638 | /* Set or reset variables holding references to mapped regions. If | |
4639 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4640 | non-zero, set all variables to the start of the user-areas | |
4641 | of mapped regions. | |
4642 | ||
4643 | This function is called from Fdump_emacs to ensure that the dumped | |
4644 | Emacs doesn't contain references to memory that won't be mapped | |
4645 | when Emacs starts. */ | |
4646 | ||
4647 | void | |
1dae0f0a | 4648 | mmap_set_vars (int restore_p) |
b86af064 GM |
4649 | { |
4650 | struct mmap_region *r; | |
4651 | ||
4652 | if (restore_p) | |
4653 | { | |
4654 | mmap_regions = mmap_regions_1; | |
4655 | mmap_fd = mmap_fd_1; | |
4656 | for (r = mmap_regions; r; r = r->next) | |
4657 | *r->var = MMAP_USER_AREA (r); | |
4658 | } | |
4659 | else | |
4660 | { | |
4661 | for (r = mmap_regions; r; r = r->next) | |
4662 | *r->var = NULL; | |
4663 | mmap_regions_1 = mmap_regions; | |
4664 | mmap_regions = NULL; | |
4665 | mmap_fd_1 = mmap_fd; | |
4666 | mmap_fd = -1; | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | ||
4671 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4672 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4673 | address of some variable which will use the data area. | |
4674 | ||
4675 | The allocation of 0 bytes is valid. | |
4676 | ||
4677 | If we can't allocate the necessary memory, set *VAR to null, and | |
4678 | return null. */ | |
4679 | ||
261cb4bb PE |
4680 | static void * |
4681 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4682 | { |
4683 | void *p; | |
4684 | size_t map; | |
4685 | ||
4686 | mmap_init (); | |
4687 | ||
4688 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4689 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4690 | mmap_fd, 0); | |
177c0ea7 | 4691 | |
b86af064 GM |
4692 | if (p == MAP_FAILED) |
4693 | { | |
4694 | if (errno != ENOMEM) | |
4695 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4696 | p = NULL; | |
4697 | } | |
4698 | else | |
4699 | { | |
4700 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4701 | |
b86af064 GM |
4702 | r->nbytes_specified = nbytes; |
4703 | r->nbytes_mapped = map; | |
4704 | r->var = var; | |
4705 | r->prev = NULL; | |
4706 | r->next = mmap_regions; | |
4707 | if (r->next) | |
4708 | r->next->prev = r; | |
4709 | mmap_regions = r; | |
177c0ea7 | 4710 | |
b86af064 GM |
4711 | p = MMAP_USER_AREA (p); |
4712 | } | |
177c0ea7 | 4713 | |
b86af064 GM |
4714 | return *var = p; |
4715 | } | |
4716 | ||
4717 | ||
1dae0f0a AS |
4718 | /* Free a block of relocatable storage whose data is pointed to by |
4719 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4720 | ||
4721 | static void | |
261cb4bb | 4722 | mmap_free (void **var) |
1dae0f0a AS |
4723 | { |
4724 | mmap_init (); | |
4725 | ||
4726 | if (*var) | |
4727 | { | |
4728 | mmap_free_1 (MMAP_REGION (*var)); | |
4729 | *var = NULL; | |
4730 | } | |
4731 | } | |
4732 | ||
4733 | ||
b86af064 GM |
4734 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4735 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4736 | and return this value. If more memory cannot be allocated, then | |
4737 | leave *VAR unchanged, and return null. */ | |
4738 | ||
261cb4bb PE |
4739 | static void * |
4740 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4741 | { |
261cb4bb | 4742 | void *result; |
177c0ea7 | 4743 | |
b86af064 GM |
4744 | mmap_init (); |
4745 | ||
4746 | if (*var == NULL) | |
4747 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4748 | else if (nbytes == 0) |
b86af064 GM |
4749 | { |
4750 | mmap_free (var); | |
4751 | result = mmap_alloc (var, nbytes); | |
4752 | } | |
4753 | else | |
4754 | { | |
4755 | struct mmap_region *r = MMAP_REGION (*var); | |
4756 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4757 | |
b86af064 GM |
4758 | if (room < nbytes) |
4759 | { | |
4760 | /* Must enlarge. */ | |
261cb4bb | 4761 | void *old_ptr = *var; |
b86af064 GM |
4762 | |
4763 | /* Try to map additional pages at the end of the region. | |
4764 | If that fails, allocate a new region, copy data | |
4765 | from the old region, then free it. */ | |
4766 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4767 | / mmap_page_size))) | |
4768 | { | |
4769 | r->nbytes_specified = nbytes; | |
4770 | *var = result = old_ptr; | |
4771 | } | |
4772 | else if (mmap_alloc (var, nbytes)) | |
4773 | { | |
72af86bd | 4774 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4775 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4776 | result = *var; | |
4777 | r = MMAP_REGION (result); | |
4778 | r->nbytes_specified = nbytes; | |
4779 | } | |
4780 | else | |
4781 | { | |
4782 | *var = old_ptr; | |
4783 | result = NULL; | |
4784 | } | |
4785 | } | |
4786 | else if (room - nbytes >= mmap_page_size) | |
4787 | { | |
4788 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4789 | memory back to the system. |
4790 | ||
4791 | The extra parens are to make the division happens first, | |
4792 | on positive values, so we know it will round towards | |
4793 | zero. */ | |
bb63c5c9 | 4794 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4795 | result = *var; |
4796 | r->nbytes_specified = nbytes; | |
4797 | } | |
4798 | else | |
4799 | { | |
4800 | /* Leave it alone. */ | |
4801 | result = *var; | |
4802 | r->nbytes_specified = nbytes; | |
4803 | } | |
4804 | } | |
4805 | ||
4806 | return result; | |
4807 | } | |
4808 | ||
4809 | ||
b86af064 GM |
4810 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4811 | ||
4812 | ||
4813 | \f | |
4814 | /*********************************************************************** | |
4815 | Buffer-text Allocation | |
4816 | ***********************************************************************/ | |
4817 | ||
b86af064 GM |
4818 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
4819 | ||
4820 | static void | |
fd05c7e9 | 4821 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 4822 | { |
261cb4bb | 4823 | void *p; |
177c0ea7 | 4824 | |
b86af064 GM |
4825 | BLOCK_INPUT; |
4826 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4827 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4828 | #elif defined REL_ALLOC |
261cb4bb | 4829 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4830 | #else |
815add84 | 4831 | p = xmalloc (nbytes); |
b86af064 | 4832 | #endif |
177c0ea7 | 4833 | |
b86af064 GM |
4834 | if (p == NULL) |
4835 | { | |
4836 | UNBLOCK_INPUT; | |
531b0165 | 4837 | memory_full (nbytes); |
b86af064 GM |
4838 | } |
4839 | ||
4840 | b->text->beg = (unsigned char *) p; | |
4841 | UNBLOCK_INPUT; | |
4842 | } | |
4843 | ||
4844 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4845 | shrink it. */ | |
4846 | ||
4847 | void | |
d311d28c | 4848 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 4849 | { |
261cb4bb | 4850 | void *p; |
fd05c7e9 PE |
4851 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4852 | + delta); | |
b86af064 GM |
4853 | BLOCK_INPUT; |
4854 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4855 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4856 | #elif defined REL_ALLOC |
261cb4bb | 4857 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
4858 | #else |
4859 | p = xrealloc (b->text->beg, nbytes); | |
4860 | #endif | |
177c0ea7 | 4861 | |
b86af064 GM |
4862 | if (p == NULL) |
4863 | { | |
4864 | UNBLOCK_INPUT; | |
531b0165 | 4865 | memory_full (nbytes); |
b86af064 GM |
4866 | } |
4867 | ||
4868 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4869 | UNBLOCK_INPUT; | |
4870 | } | |
4871 | ||
4872 | ||
4873 | /* Free buffer B's text buffer. */ | |
4874 | ||
4875 | static void | |
d3da34e0 | 4876 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4877 | { |
4878 | BLOCK_INPUT; | |
4879 | ||
4880 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4881 | mmap_free ((void **) &b->text->beg); |
b86af064 | 4882 | #elif defined REL_ALLOC |
261cb4bb | 4883 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
4884 | #else |
4885 | xfree (b->text->beg); | |
4886 | #endif | |
177c0ea7 | 4887 | |
b86af064 GM |
4888 | BUF_BEG_ADDR (b) = NULL; |
4889 | UNBLOCK_INPUT; | |
4890 | } | |
4891 | ||
4892 | ||
4893 | \f | |
4894 | /*********************************************************************** | |
4895 | Initialization | |
4896 | ***********************************************************************/ | |
4897 | ||
dfcf069d | 4898 | void |
d3da34e0 | 4899 | init_buffer_once (void) |
1ab256cb | 4900 | { |
7c02e886 | 4901 | int idx; |
3884d954 DA |
4902 | /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make |
4903 | sure that this is still correct. Otherwise, mark_vectorlike may not | |
4904 | trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */ | |
38182d90 | 4905 | const int pvecsize |
663e2b3f | 4906 | = (offsetof (struct buffer, own_text) - header_size) / word_size; |
7c02e886 | 4907 | |
72af86bd | 4908 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4909 | |
1ab256cb RM |
4910 | /* Make sure all markable slots in buffer_defaults |
4911 | are initialized reasonably, so mark_buffer won't choke. */ | |
4912 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4913 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4914 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4915 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4916 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4917 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4918 | /* Prevent GC from getting confused. */ |
4919 | buffer_defaults.text = &buffer_defaults.own_text; | |
4920 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
4921 | /* No one will share the text with these buffers, but let's play it safe. */ |
4922 | buffer_defaults.indirections = 0; | |
4923 | buffer_local_symbols.indirections = 0; | |
8707c1e5 DA |
4924 | buffer_set_intervals (&buffer_defaults, NULL); |
4925 | buffer_set_intervals (&buffer_local_symbols, NULL); | |
3884d954 | 4926 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, pvecsize); |
67180c6a | 4927 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3884d954 | 4928 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, pvecsize); |
67180c6a | 4929 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4930 | |
4931 | /* Set up the default values of various buffer slots. */ | |
4932 | /* Must do these before making the first buffer! */ | |
4933 | ||
f532dca0 | 4934 | /* real setup is done in bindings.el */ |
4c31be61 DA |
4935 | BSET (&buffer_defaults, mode_line_format, build_pure_c_string ("%-")); |
4936 | BSET (&buffer_defaults, header_line_format, Qnil); | |
4937 | BSET (&buffer_defaults, abbrev_mode, Qnil); | |
4938 | BSET (&buffer_defaults, overwrite_mode, Qnil); | |
4939 | BSET (&buffer_defaults, case_fold_search, Qt); | |
4940 | BSET (&buffer_defaults, auto_fill_function, Qnil); | |
4941 | BSET (&buffer_defaults, selective_display, Qnil); | |
4942 | BSET (&buffer_defaults, selective_display_ellipses, Qt); | |
4943 | BSET (&buffer_defaults, abbrev_table, Qnil); | |
4944 | BSET (&buffer_defaults, display_table, Qnil); | |
4945 | BSET (&buffer_defaults, undo_list, Qnil); | |
4946 | BSET (&buffer_defaults, mark_active, Qnil); | |
4947 | BSET (&buffer_defaults, file_format, Qnil); | |
4948 | BSET (&buffer_defaults, auto_save_file_format, Qt); | |
2410d73a SM |
4949 | buffer_defaults.overlays_before = NULL; |
4950 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4951 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4952 | |
4b4deea2 | 4953 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4c31be61 DA |
4954 | BSET (&buffer_defaults, truncate_lines, Qnil); |
4955 | BSET (&buffer_defaults, word_wrap, Qnil); | |
4956 | BSET (&buffer_defaults, ctl_arrow, Qt); | |
4957 | BSET (&buffer_defaults, bidi_display_reordering, Qt); | |
4958 | BSET (&buffer_defaults, bidi_paragraph_direction, Qnil); | |
4959 | BSET (&buffer_defaults, cursor_type, Qt); | |
4960 | BSET (&buffer_defaults, extra_line_spacing, Qnil); | |
4961 | BSET (&buffer_defaults, cursor_in_non_selected_windows, Qt); | |
4962 | ||
4963 | BSET (&buffer_defaults, enable_multibyte_characters, Qt); | |
4964 | BSET (&buffer_defaults, buffer_file_coding_system, Qnil); | |
4b4deea2 TT |
4965 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); |
4966 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4c31be61 DA |
4967 | BSET (&buffer_defaults, cache_long_line_scans, Qnil); |
4968 | BSET (&buffer_defaults, file_truename, Qnil); | |
4b4deea2 TT |
4969 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); |
4970 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4971 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4c31be61 DA |
4972 | BSET (&buffer_defaults, left_fringe_width, Qnil); |
4973 | BSET (&buffer_defaults, right_fringe_width, Qnil); | |
4974 | BSET (&buffer_defaults, fringes_outside_margins, Qnil); | |
4975 | BSET (&buffer_defaults, scroll_bar_width, Qnil); | |
4976 | BSET (&buffer_defaults, vertical_scroll_bar_type, Qt); | |
4977 | BSET (&buffer_defaults, indicate_empty_lines, Qnil); | |
4978 | BSET (&buffer_defaults, indicate_buffer_boundaries, Qnil); | |
4979 | BSET (&buffer_defaults, fringe_indicator_alist, Qnil); | |
4980 | BSET (&buffer_defaults, fringe_cursor_alist, Qnil); | |
4981 | BSET (&buffer_defaults, scroll_up_aggressively, Qnil); | |
4982 | BSET (&buffer_defaults, scroll_down_aggressively, Qnil); | |
4983 | BSET (&buffer_defaults, display_time, Qnil); | |
1ab256cb RM |
4984 | |
4985 | /* Assign the local-flags to the slots that have default values. | |
4986 | The local flag is a bit that is used in the buffer | |
4987 | to say that it has its own local value for the slot. | |
4988 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4989 | ||
4990 | /* Nothing can work if this isn't true */ | |
663e2b3f | 4991 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
4992 | |
4993 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4994 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4c31be61 DA |
4995 | BSET (&buffer_local_flags, filename, make_number (-1)); |
4996 | BSET (&buffer_local_flags, directory, make_number (-1)); | |
4997 | BSET (&buffer_local_flags, backed_up, make_number (-1)); | |
4998 | BSET (&buffer_local_flags, save_length, make_number (-1)); | |
4999 | BSET (&buffer_local_flags, auto_save_file_name, make_number (-1)); | |
5000 | BSET (&buffer_local_flags, read_only, make_number (-1)); | |
5001 | BSET (&buffer_local_flags, major_mode, make_number (-1)); | |
5002 | BSET (&buffer_local_flags, mode_name, make_number (-1)); | |
5003 | BSET (&buffer_local_flags, undo_list, make_number (-1)); | |
5004 | BSET (&buffer_local_flags, mark_active, make_number (-1)); | |
5005 | BSET (&buffer_local_flags, point_before_scroll, make_number (-1)); | |
5006 | BSET (&buffer_local_flags, file_truename, make_number (-1)); | |
5007 | BSET (&buffer_local_flags, invisibility_spec, make_number (-1)); | |
5008 | BSET (&buffer_local_flags, file_format, make_number (-1)); | |
5009 | BSET (&buffer_local_flags, auto_save_file_format, make_number (-1)); | |
5010 | BSET (&buffer_local_flags, display_count, make_number (-1)); | |
5011 | BSET (&buffer_local_flags, display_time, make_number (-1)); | |
5012 | BSET (&buffer_local_flags, enable_multibyte_characters, make_number (-1)); | |
8d7a4592 | 5013 | |
7c02e886 | 5014 | idx = 1; |
4b4deea2 TT |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5016 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5017 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5018 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5019 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5020 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5021 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5022 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5023 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5024 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5025 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5026 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5027 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5028 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5029 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5030 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5031 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5032 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5033 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5034 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5035 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5036 | /* Make this one a permanent local. */ |
7c02e886 | 5037 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5038 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5039 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5040 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5041 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5042 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5043 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5044 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5045 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5046 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5047 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5048 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5049 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5050 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5051 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5052 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5053 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5054 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5055 | |
5056 | /* Need more room? */ | |
7313acd0 | 5057 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5058 | abort (); |
7313acd0 | 5059 | last_per_buffer_idx = idx; |
177c0ea7 | 5060 | |
1ab256cb RM |
5061 | Vbuffer_alist = Qnil; |
5062 | current_buffer = 0; | |
5063 | all_buffers = 0; | |
5064 | ||
2a0213a6 | 5065 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5066 | |
d67b4f80 | 5067 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4c31be61 | 5068 | BSET (&buffer_defaults, major_mode, Qfundamental_mode); |
1ab256cb | 5069 | |
d67b4f80 | 5070 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5071 | |
d67b4f80 | 5072 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5073 | |
d67b4f80 | 5074 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5075 | |
d67b4f80 | 5076 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5077 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5078 | |
1ab256cb | 5079 | /* super-magic invisible buffer */ |
2a0213a6 | 5080 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5081 | Vbuffer_alist = Qnil; |
5082 | ||
2a0213a6 | 5083 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5084 | |
5085 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5086 | } |
5087 | ||
dfcf069d | 5088 | void |
d3da34e0 | 5089 | init_buffer (void) |
1ab256cb | 5090 | { |
2381d133 | 5091 | char *pwd; |
136351b7 | 5092 | Lisp_Object temp; |
965d34eb | 5093 | ptrdiff_t len; |
1ab256cb | 5094 | |
b86af064 | 5095 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5096 | { |
5097 | /* When using the ralloc implementation based on mmap(2), buffer | |
5098 | text pointers will have been set to null in the dumped Emacs. | |
5099 | Map new memory. */ | |
5100 | struct buffer *b; | |
177c0ea7 | 5101 | |
52b852c7 | 5102 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5103 | if (b->text->beg == NULL) |
b86af064 | 5104 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5105 | } |
b86af064 | 5106 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5107 | |
1ab256cb | 5108 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5109 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5110 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5111 | |
01537133 | 5112 | pwd = get_current_dir_name (); |
a17b5ed1 | 5113 | |
156bdb41 | 5114 | if (!pwd) |
a17b5ed1 | 5115 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5116 | |
1ab256cb RM |
5117 | /* Maybe this should really use some standard subroutine |
5118 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5119 | len = strlen (pwd); |
5120 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5121 | { |
156bdb41 | 5122 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5123 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5124 | if (!pwd) |
5125 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5126 | pwd[len] = DIRECTORY_SEP; |
5127 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5128 | len++; |
f7975d07 | 5129 | } |
0995fa35 | 5130 | |
4c31be61 | 5131 | BSET (current_buffer, directory, make_unibyte_string (pwd, len)); |
4b4deea2 | 5132 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5133 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5134 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5135 | that ENCODE_FILE correctly gets the original bytes. */ |
4c31be61 DA |
5136 | BSET (current_buffer, directory, |
5137 | string_to_multibyte (BVAR (current_buffer, directory))); | |
136351b7 | 5138 | |
0995fa35 RS |
5139 | /* Add /: to the front of the name |
5140 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5141 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5142 | if (! NILP (temp) |
5143 | /* If the default dir is just /, TEMP is non-nil | |
5144 | because of the ange-ftp completion handler. | |
5145 | However, it is not necessary to turn / into /:/. | |
5146 | So avoid doing that. */ | |
4b4deea2 | 5147 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
4c31be61 DA |
5148 | BSET (current_buffer, directory, |
5149 | concat2 (build_string ("/:"), BVAR (current_buffer, directory))); | |
0995fa35 | 5150 | |
136351b7 | 5151 | temp = get_minibuffer (0); |
4c31be61 | 5152 | BSET (XBUFFER (temp), directory, BVAR (current_buffer, directory)); |
01537133 EZ |
5153 | |
5154 | free (pwd); | |
1ab256cb RM |
5155 | } |
5156 | ||
d6aa1876 SM |
5157 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5158 | Object stored in the current buffer. address is the address of the slot | |
5159 | in the buffer that is current now. */ | |
5160 | ||
5161 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5162 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5163 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5164 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5165 | VNAME is the name of the buffer slot. |
5166 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5167 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5168 | do { \ | |
5169 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5170 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5171 | } while (0) |
d6aa1876 SM |
5172 | |
5173 | static void | |
8ea90aa3 | 5174 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5175 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5176 | { |
ce5b453a | 5177 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5178 | int offset; |
5179 | ||
ce5b453a | 5180 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5181 | offset = (char *)address - (char *)current_buffer; |
5182 | ||
ce5b453a SM |
5183 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5184 | bo_fwd->offset = offset; | |
5185 | bo_fwd->slottype = type; | |
b9598260 | 5186 | sym->declared_special = 1; |
ce5b453a SM |
5187 | sym->redirect = SYMBOL_FORWARDED; |
5188 | { | |
5189 | /* I tried to do the job without a cast, but it seems impossible. | |
5190 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5191 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5192 | } | |
5193 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5194 | |
5195 | if (PER_BUFFER_IDX (offset) == 0) | |
5196 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5197 | slot of buffer_local_flags */ | |
5198 | abort (); | |
5199 | } | |
5200 | ||
5201 | ||
1ab256cb | 5202 | /* initialize the buffer routines */ |
dfcf069d | 5203 | void |
d3da34e0 | 5204 | syms_of_buffer (void) |
1ab256cb | 5205 | { |
9115729e KH |
5206 | staticpro (&last_overlay_modification_hooks); |
5207 | last_overlay_modification_hooks | |
5208 | = Fmake_vector (make_number (10), Qnil); | |
5209 | ||
1ab256cb RM |
5210 | staticpro (&Vbuffer_defaults); |
5211 | staticpro (&Vbuffer_local_symbols); | |
5212 | staticpro (&Qfundamental_mode); | |
5213 | staticpro (&Qmode_class); | |
5214 | staticpro (&QSFundamental); | |
5215 | staticpro (&Vbuffer_alist); | |
5216 | staticpro (&Qprotected_field); | |
5217 | staticpro (&Qpermanent_local); | |
5218 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5219 | |
5220 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5221 | DEFSYM (Qoverlayp, "overlayp"); | |
5222 | DEFSYM (Qevaporate, "evaporate"); | |
5223 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5224 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5225 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5226 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5227 | DEFSYM (Qpriority, "priority"); | |
5228 | DEFSYM (Qbefore_string, "before-string"); | |
5229 | DEFSYM (Qafter_string, "after-string"); | |
5230 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5231 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5232 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5233 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5234 | ||
1ab256cb | 5235 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5236 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5237 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5238 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5239 | |
422745d0 TT |
5240 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5241 | mode_line_format, | |
5242 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5243 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5244 | |
422745d0 TT |
5245 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5246 | header_line_format, | |
5247 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5248 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5249 | |
422745d0 TT |
5250 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5251 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5252 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5253 | |
422745d0 TT |
5254 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5255 | extra_line_spacing, | |
5256 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5257 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5258 | |
422745d0 TT |
5259 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5260 | cursor_in_non_selected_windows, | |
5261 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5262 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5263 | ||
422745d0 TT |
5264 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5265 | abbrev_mode, | |
5266 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5267 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5268 | |
422745d0 TT |
5269 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5270 | ctl_arrow, | |
5271 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5272 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5273 | |
422745d0 TT |
5274 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5275 | enable_multibyte_characters, | |
fb7ada5f | 5276 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5277 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5278 | |
422745d0 TT |
5279 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5280 | buffer_file_coding_system, | |
5281 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5282 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5283 | |
422745d0 TT |
5284 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5285 | truncate_lines, | |
5286 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5287 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5288 | |
422745d0 TT |
5289 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5290 | fill_column, | |
5291 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5292 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5293 | |
422745d0 TT |
5294 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5295 | left_margin, | |
5296 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5297 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5298 | |
422745d0 TT |
5299 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5300 | tab_width, | |
5301 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5302 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5303 | |
422745d0 TT |
5304 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5305 | case_fold_search, | |
5306 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5307 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5308 | |
422745d0 TT |
5309 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5310 | left_margin_cols, | |
5311 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5312 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5313 | |
422745d0 TT |
5314 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5315 | right_margin_cols, | |
5316 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5317 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5318 | |
422745d0 TT |
5319 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5320 | left_fringe_width, | |
5321 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5322 | This is the same as (default-value 'left-fringe-width). */); |
5323 | ||
422745d0 TT |
5324 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5325 | right_fringe_width, | |
5326 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5327 | This is the same as (default-value 'right-fringe-width). */); |
5328 | ||
422745d0 TT |
5329 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5330 | fringes_outside_margins, | |
5331 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5332 | This is the same as (default-value 'fringes-outside-margins). */); |
5333 | ||
422745d0 TT |
5334 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5335 | scroll_bar_width, | |
5336 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5337 | This is the same as (default-value 'scroll-bar-width). */); |
5338 | ||
422745d0 TT |
5339 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5340 | vertical_scroll_bar_type, | |
5341 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5342 | This is the same as (default-value 'vertical-scroll-bar). */); |
5343 | ||
422745d0 TT |
5344 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5345 | indicate_empty_lines, | |
5346 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5347 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5348 | |
422745d0 TT |
5349 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5350 | indicate_buffer_boundaries, | |
5351 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5352 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5353 | ||
422745d0 TT |
5354 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5355 | fringe_indicator_alist, | |
5356 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5357 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5358 | ||
422745d0 TT |
5359 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5360 | fringe_cursor_alist, | |
5361 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5362 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5363 | ||
422745d0 TT |
5364 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5365 | scroll_up_aggressively, | |
5366 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5367 | This value applies in buffers that don't have their own local values. |
fc961256 | 5368 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5369 | |
422745d0 TT |
5370 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5371 | scroll_down_aggressively, | |
5372 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5373 | This value applies in buffers that don't have their own local values. |
fc961256 | 5374 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5375 | |
045dee35 | 5376 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5377 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5378 | Qnil, |
7614d762 RS |
5379 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5380 | The header line appears, optionally, at the top of a window; | |
5381 | the mode line appears at the bottom. */); | |
177c0ea7 | 5382 | |
4b4deea2 | 5383 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5384 | Qnil, |
5385 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5386 | |
5387 | The value may be nil, a string, a symbol or a list. | |
5388 | ||
018ba359 | 5389 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5390 | |
5391 | For any symbol other than t or nil, the symbol's value is processed as | |
5392 | a mode line construct. As a special exception, if that value is a | |
5393 | string, the string is processed verbatim, without handling any | |
5394 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5395 | `risky-local-variable' property, all properties in any strings, as | |
5396 | well as all :eval and :propertize forms in the value, are ignored. | |
5397 | ||
5398 | A list whose car is a string or list is processed by processing each | |
5399 | of the list elements recursively, as separate mode line constructs, | |
5400 | and concatenating the results. | |
5401 | ||
5402 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5403 | using the result as a mode line construct. Be careful--FORM should | |
5404 | not load any files, because that can cause an infinite recursion. | |
5405 | ||
5406 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5407 | processing ELT as the mode line construct, and adding the text | |
5408 | properties PROPS to the result. | |
5409 | ||
5410 | A list whose car is a symbol is processed by examining the symbol's | |
5411 | value, and, if that value is non-nil, processing the cadr of the list | |
5412 | recursively; and if that value is nil, processing the caddr of the | |
5413 | list recursively. | |
5414 | ||
5415 | A list whose car is an integer is processed by processing the cadr of | |
5416 | the list, and padding (if the number is positive) or truncating (if | |
5417 | negative) to the width specified by that number. | |
5418 | ||
018ba359 | 5419 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5420 | %b -- print buffer name. %f -- print visited file name. |
5421 | %F -- print frame name. | |
5422 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5423 | %& is like %*, but ignore read-only-ness. | |
5424 | % means buffer is read-only and * means it is modified. | |
5425 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5426 | %s -- print process status. %l -- print the current line number. | |
5427 | %c -- print the current column number (this makes editing slower). | |
5428 | To make the column number update correctly in all cases, | |
5429 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5430 | %i -- print the size of the buffer. |
5431 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5432 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5433 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5434 | or print Bottom or All. | |
018ba359 | 5435 | %n -- print Narrow if appropriate. |
dafbe726 | 5436 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5437 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5438 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5439 | %e -- print error message about full memory. |
f7165034 NR |
5440 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5441 | remote machine. | |
018ba359 PJ |
5442 | %[ -- print one [ for each recursive editing level. %] similar. |
5443 | %% -- print %. %- -- print infinitely many dashes. | |
5444 | Decimal digits after the % specify field width to which to pad. */); | |
5445 | ||
422745d0 | 5446 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5447 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5448 | |
4b4deea2 | 5449 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5450 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5451 | doc: /* Symbol for current buffer's major mode. |
5452 | The default value (normally `fundamental-mode') affects new buffers. | |
5453 | A value of nil means to use the current buffer's major mode, provided | |
5454 | it is not marked as "special". | |
5455 | ||
5456 | When a mode is used by default, `find-file' switches to it before it | |
5457 | reads the contents into the buffer and before it finishes setting up | |
5458 | the buffer. Thus, the mode and its hooks should not expect certain | |
5459 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5460 | to be set up. */); | |
1ab256cb | 5461 | |
4b4deea2 | 5462 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5463 | Qnil, |
64a7c220 | 5464 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5465 | Usually a string, but can use any of the constructs for `mode-line-format', |
5466 | which see. | |
5467 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5468 | |
4b4deea2 | 5469 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5470 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5471 | ||
4b4deea2 | 5472 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5473 | doc: /* Non-nil if Abbrev mode is enabled. |
5474 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5475 | |
4b4deea2 | 5476 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5477 | Qnil, |
fb7ada5f | 5478 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5479 | |
4b4deea2 | 5480 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
d5040d2d | 5481 | make_number (Lisp_Int0), |
fb7ada5f | 5482 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5483 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5484 | |
4b4deea2 | 5485 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
d5040d2d | 5486 | make_number (Lisp_Int0), |
fb7ada5f | 5487 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5488 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5489 | |
4b4deea2 | 5490 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
d5040d2d | 5491 | make_number (Lisp_Int0), |
fb7ada5f | 5492 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5493 | This should be an integer greater than zero. */); |
1ab256cb | 5494 | |
4b4deea2 | 5495 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5496 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5497 | A value of nil means use backslash and octal digits. |
5498 | This variable does not apply to characters whose display is specified | |
5499 | in the current display table (if there is one). */); | |
1ab256cb | 5500 | |
3b06f880 | 5501 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5502 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5503 | Qnil, |
efc7e75f | 5504 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5505 | Otherwise they are regarded as unibyte. This affects the display, |
5506 | file I/O and the behavior of various editing commands. | |
5507 | ||
5508 | This variable is buffer-local but you cannot set it directly; | |
5509 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5510 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5511 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5512 | |
c71b5d9b | 5513 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5514 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5515 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5516 | This variable applies to saving the buffer, and also to `write-region' |
5517 | and other functions that use `write-region'. | |
5518 | It does not apply to sending output to subprocesses, however. | |
5519 | ||
5520 | If this is nil, the buffer is saved without any code conversion | |
5521 | unless some coding system is specified in `file-coding-system-alist' | |
5522 | for the buffer file. | |
5523 | ||
31a6cb06 EZ |
5524 | If the text to be saved cannot be encoded as specified by this variable, |
5525 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5526 | ||
018ba359 PJ |
5527 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5528 | ||
5529 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5530 | |
f44e260c | 5531 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5532 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5533 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5534 | |
6c0cf218 | 5535 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5536 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5537 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5538 | |
b44d9321 EZ |
5539 | If this is nil (the default), the direction of each paragraph is |
5540 | determined by the first strong directional character of its text. | |
5541 | The values of `right-to-left' and `left-to-right' override that. | |
5542 | Any other value is treated as nil. | |
b4bf28b7 | 5543 | |
b44d9321 EZ |
5544 | This variable has no effect unless the buffer's value of |
5545 | \`bidi-display-reordering' is non-nil. */); | |
5546 | ||
4b4deea2 | 5547 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5548 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5549 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5550 | |
5551 | Note that this is overridden by the variable | |
5552 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5553 | and this buffer is not full-frame width. |
5554 | ||
5555 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5556 | |
4b4deea2 | 5557 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5558 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5559 | When word-wrapping is on, continuation lines are wrapped at the space |
5560 | or tab character nearest to the right window edge. | |
5561 | If nil, continuation lines are wrapped at the right screen edge. | |
5562 | ||
5563 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5564 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5565 | word-wrapping, you might want to reduce the value of | |
5566 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5567 | in narrower windows. |
5568 | ||
5569 | Instead of setting this variable directly, most users should use | |
5570 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5571 | to t, and additionally redefines simple editing commands to act on | |
5572 | visual lines rather than logical lines. See the documentation of | |
5573 | `visual-line-mode'. */); | |
0858cd02 | 5574 | |
4b4deea2 | 5575 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5576 | make_number (Lisp_String), |
efc7e75f | 5577 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5578 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5579 | |
4b4deea2 | 5580 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5581 | Qnil, |
efc7e75f | 5582 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5583 | It is called after self-inserting any character specified in |
5584 | the `auto-fill-chars' table. | |
5585 | NOTE: This variable is not a hook; | |
5586 | its value may not be a list of functions. */); | |
1ab256cb | 5587 | |
4b4deea2 | 5588 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5589 | make_number (Lisp_String), |
efc7e75f | 5590 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5591 | |
4b4deea2 | 5592 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5593 | make_number (Lisp_String), |
efc7e75f | 5594 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5595 | The truename of a file is calculated by `file-truename' |
5596 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5597 | |
1ab256cb | 5598 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5599 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5600 | make_number (Lisp_String), |
7614d762 RS |
5601 | doc: /* Name of file for auto-saving current buffer. |
5602 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5603 | |
4b4deea2 | 5604 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5605 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5606 | |
4b4deea2 | 5607 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5608 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5609 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5610 | |
4b4deea2 | 5611 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
d5040d2d | 5612 | make_number (Lisp_Int0), |
efc7e75f | 5613 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5614 | 0 initially. |
5615 | -1 means auto-saving turned off until next real save. | |
5616 | ||
5617 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5618 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5619 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5620 | |
4b4deea2 | 5621 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5622 | Qnil, |
7614d762 | 5623 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5624 | An integer N as value means display only lines |
5625 | that start with less than N columns of space. | |
7614d762 RS |
5626 | A value of t means that the character ^M makes itself and |
5627 | all the rest of the line invisible; also, when saving the buffer | |
5628 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5629 | |
1ab256cb | 5630 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5631 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5632 | Qnil, |
3f676284 | 5633 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5634 | |
4b4deea2 | 5635 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5636 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5637 | The value should be one of `overwrite-mode-textual', |
5638 | `overwrite-mode-binary', or nil. | |
5639 | If it is `overwrite-mode-textual', self-insertion still | |
5640 | inserts at the end of a line, and inserts when point is before a tab, | |
5641 | until the tab is filled in. | |
5642 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5643 | ||
4b4deea2 | 5644 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5645 | Qnil, |
efc7e75f | 5646 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5647 | |
5648 | If this variable is nil, the value of `standard-display-table' is used. | |
5649 | Each window can have its own, overriding display table, see | |
5650 | `set-window-display-table' and `window-display-table'. | |
5651 | ||
5652 | The display table is a char-table created with `make-display-table'. | |
5653 | A char-table is an array indexed by character codes. Normal array | |
5654 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5655 | ||
5656 | Each of the char-table elements control how to display the corresponding | |
5657 | text character: the element at index C in the table says how to display | |
5658 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5659 | characters or nil. The value nil means display the character in the |
5660 | default fashion; otherwise, the characters from the vector are delivered | |
5661 | to the screen instead of the original character. | |
018ba359 | 5662 | |
5fd11dc8 | 5663 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5664 | to display a capital Y instead of each X character. |
018ba359 PJ |
5665 | |
5666 | In addition, a char-table has six extra slots to control the display of: | |
5667 | ||
5668 | the end of a truncated screen line (extra-slot 0, a single character); | |
5669 | the end of a continued line (extra-slot 1, a single character); | |
5670 | the escape character used to display character codes in octal | |
5671 | (extra-slot 2, a single character); | |
5672 | the character used as an arrow for control characters (extra-slot 3, | |
5673 | a single character); | |
5674 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5675 | a vector of characters); | |
5676 | the character used to draw the border between side-by-side windows | |
5677 | (extra-slot 5, a single character). | |
5678 | ||
5679 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5680 | |
4b4deea2 | 5681 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5682 | Qnil, |
fb7ada5f | 5683 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5684 | A value of nil means no marginal area. */); |
177c0ea7 | 5685 | |
4b4deea2 | 5686 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5687 | Qnil, |
fb7ada5f | 5688 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5689 | A value of nil means no marginal area. */); |
177c0ea7 | 5690 | |
4b4deea2 | 5691 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5692 | Qnil, |
fb7ada5f | 5693 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5694 | A value of 0 means no left fringe is shown in this buffer's window. |
5695 | A value of nil means to use the left fringe width from the window's frame. */); | |
5696 | ||
4b4deea2 | 5697 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5698 | Qnil, |
fb7ada5f | 5699 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5700 | A value of 0 means no right fringe is shown in this buffer's window. |
5701 | A value of nil means to use the right fringe width from the window's frame. */); | |
5702 | ||
4b4deea2 | 5703 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5704 | Qnil, |
fb7ada5f | 5705 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5706 | A value of nil means to display fringes between margins and buffer text. */); |
5707 | ||
4b4deea2 | 5708 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5709 | Qnil, |
fb7ada5f | 5710 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5711 | A value of nil means to use the scroll bar width from the window's frame. */); |
5712 | ||
4b4deea2 | 5713 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5714 | Qnil, |
fb7ada5f | 5715 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5716 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5717 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5718 | |
fc2c8887 RS |
5719 | A value of `left' or `right' means put the vertical scroll bar at that side |
5720 | of the window; a value of nil means don't show any vertical scroll bars. | |
5721 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5722 | |
0552666b | 5723 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5724 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5725 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5726 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5727 | window-systems. */); | |
177c0ea7 | 5728 | |
6b61353c | 5729 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5730 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5731 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5732 | If non-nil, the first and last line of the buffer are marked in the fringe |
5733 | of a window on window-systems with angle bitmaps, or if the window can be | |
5734 | scrolled, the top and bottom line of the window are marked with up and down | |
5735 | arrow bitmaps. | |
b2229037 KS |
5736 | |
5737 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5738 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5739 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5740 | the left fringe but no arrows. |
b2229037 | 5741 | |
79e3497d RS |
5742 | You can exercise more precise control by using an alist as the |
5743 | value. Each alist element (INDICATOR . POSITION) specifies | |
5744 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5745 | `bottom', `up', `down', or t, which specifies the default position, |
5746 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5747 | this indicator. | |
5748 | ||
5749 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5750 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5751 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5752 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5753 | |
c6a46372 | 5754 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5755 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5756 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5757 | The value is an alist where each element (INDICATOR . BITMAPS) |
5758 | specifies the fringe bitmaps used to display a specific logical | |
5759 | fringe indicator. | |
5760 | ||
5761 | INDICATOR specifies the logical indicator type which is one of the | |
5762 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5763 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5764 | |
14fb5704 | 5765 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5766 | the actual bitmap shown in the left or right fringe for the logical |
5767 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5768 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5769 | are used only for the `bottom' and `top-bottom' indicators when the |
5770 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5771 | symbol which is used in both left and right fringes. */); |
5772 | ||
5773 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5774 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5775 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5776 | The value is an alist where each element (CURSOR . BITMAP) |
5777 | specifies the fringe bitmaps used to display a specific logical | |
5778 | cursor type in the fringe. | |
5779 | ||
5780 | CURSOR specifies the logical cursor type which is one of the following | |
5781 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5782 | one is used to show a hollow cursor on narrow lines display lines | |
5783 | where the normal hollow cursor will not fit. | |
5784 | ||
5785 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5786 | cursor type. */); | |
5787 | ||
0552666b | 5788 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5789 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5790 | doc: /* How far to scroll windows upward. |
5791 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5792 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5793 | means scroll to center point. A fraction means scroll to put point |
5794 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5795 | When the value is 0.0, point goes at the bottom line, which in the |
5796 | simple case that you moved off with C-f means scrolling just one line. | |
5797 | 1.0 means point goes at the top, so that in that simple case, the | |
5798 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5799 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5800 | |
0552666b | 5801 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5802 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5803 | doc: /* How far to scroll windows downward. |
5804 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5805 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5806 | means scroll to center point. A fraction means scroll to put point |
5807 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5808 | When the value is 0.0, point goes at the top line, which in the |
5809 | simple case that you moved off with C-b means scrolling just one line. | |
5810 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5811 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5812 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5813 | |
1ab256cb RM |
5814 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5815 | "Don't ask."); | |
5816 | */ | |
1ab256cb | 5817 | |
29208e82 | 5818 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5819 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5820 | Two arguments are passed to each function: the positions of |
5821 | the beginning and end of the range of old text to be changed. | |
5822 | \(For an insertion, the beginning and end are at the same place.) | |
5823 | No information is given about the length of the text after the change. | |
5824 | ||
5825 | Buffer changes made while executing the `before-change-functions' | |
5826 | don't call any before-change or after-change functions. | |
7b2bf907 | 5827 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5828 | |
5829 | If an unhandled error happens in running these functions, | |
5830 | the variable's value remains nil. That prevents the error | |
5831 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5832 | Vbefore_change_functions = Qnil; |
5833 | ||
29208e82 | 5834 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5835 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5836 | Three arguments are passed to each function: the positions of |
5837 | the beginning and end of the range of changed text, | |
5838 | and the length in bytes of the pre-change text replaced by that range. | |
5839 | \(For an insertion, the pre-change length is zero; | |
5840 | for a deletion, that length is the number of bytes deleted, | |
5841 | and the post-change beginning and end are at the same place.) | |
5842 | ||
5843 | Buffer changes made while executing the `after-change-functions' | |
5844 | don't call any before-change or after-change functions. | |
7b2bf907 | 5845 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5846 | |
5847 | If an unhandled error happens in running these functions, | |
5848 | the variable's value remains nil. That prevents the error | |
5849 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5850 | Vafter_change_functions = Qnil; |
5851 | ||
29208e82 | 5852 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5853 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5854 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5855 | Vfirst_change_hook = Qnil; |
1ab256cb | 5856 | |
4b4deea2 | 5857 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5858 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5859 | Recent changes come first; older changes follow newer. |
5860 | ||
5861 | An entry (BEG . END) represents an insertion which begins at | |
5862 | position BEG and ends at position END. | |
5863 | ||
5864 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5865 | from (abs POSITION). If POSITION is positive, point was at the front | |
5866 | of the text being deleted; if negative, point was at the end. | |
5867 | ||
d35af63c PE |
5868 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
5869 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
5870 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
5871 | modification time of the most recent save is different, this entry is |
5872 | obsolete. | |
5873 | ||
5874 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5875 | was modified between BEG and END. PROPERTY is the property name, | |
5876 | and VALUE is the old value. | |
5877 | ||
7405f386 KS |
5878 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5879 | \(apply FUN-NAME ARGS). | |
5880 | ||
5881 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5882 | in the active region. BEG and END is the range affected by this entry | |
5883 | and DELTA is the number of bytes added or deleted in that range by | |
5884 | this change. | |
c6c7dc03 | 5885 | |
018ba359 PJ |
5886 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5887 | was adjusted in position by the offset DISTANCE (an integer). | |
5888 | ||
5889 | An entry of the form POSITION indicates that point was at the buffer | |
5890 | location given by the integer. Undoing an entry of this form places | |
5891 | point at POSITION. | |
5892 | ||
b4c4f2f4 JB |
5893 | Entries with value `nil' mark undo boundaries. The undo command treats |
5894 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5895 | |
5896 | If the value of the variable is t, undo information is not recorded. */); | |
5897 | ||
4b4deea2 | 5898 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5899 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5900 | |
4b4deea2 | 5901 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5902 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5903 | |
5904 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5905 | newlines. Columnar operations (like `move-to-column' and |
5906 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5907 | widths as they go. This works well for ordinary text, but if the |
5908 | buffer's lines are very long (say, more than 500 characters), these | |
5909 | motion functions will take longer to execute. Emacs may also take | |
5910 | longer to update the display. | |
5911 | ||
5629f29b | 5912 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5913 | results of their scans, and consult the cache to avoid rescanning |
5914 | regions of the buffer until the text is modified. The caches are most | |
5915 | beneficial when they prevent the most searching---that is, when the | |
5916 | buffer contains long lines and large regions of characters with the | |
5917 | same, fixed screen width. | |
5918 | ||
5629f29b | 5919 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5920 | become slightly slower (because of the overhead of consulting the |
5921 | cache), and the caches will use memory roughly proportional to the | |
5922 | number of newlines and characters whose screen width varies. | |
5923 | ||
5924 | The caches require no explicit maintenance; their accuracy is | |
5925 | maintained internally by the Emacs primitives. Enabling or disabling | |
5926 | the cache should not affect the behavior of any of the motion | |
5927 | functions; it should only affect their performance. */); | |
5928 | ||
4b4deea2 | 5929 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5930 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5931 | |
4b4deea2 | 5932 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5933 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5934 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5935 | set when a file is visited. */); |
be9aafdd | 5936 | |
71ed49fa | 5937 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5938 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 5939 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
5940 | Should be a list of symbols naming formats that are defined in `format-alist'. |
5941 | If it is t, which is the default, auto-save files are written in the | |
5942 | same format as a regular save would use. */); | |
5943 | ||
3cb719bd | 5944 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5945 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5946 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5947 | The default is t, which means that text is invisible |
5948 | if it has a non-nil `invisible' property. | |
5949 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5950 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5951 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5952 | then characters with property value PROP are invisible, | |
5953 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5954 | |
7962a441 | 5955 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5956 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5957 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5958 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5959 | |
5960 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5961 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5962 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5963 | The function `set-window-buffer' updates this variable |
5964 | to the value obtained by calling `current-time'. | |
5965 | If the buffer has never been shown in a window, the value is nil. */); | |
5966 | ||
29208e82 | 5967 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5968 | doc: /* Non-nil if Transient Mark mode is enabled. |
5969 | See the command `transient-mark-mode' for a description of this minor mode. | |
5970 | ||
5971 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5972 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5973 | all windows or just the selected window. | |
5974 | ||
f49d1f52 | 5975 | Lisp programs may give this variable certain special values: |
9d794026 | 5976 | |
f49d1f52 SM |
5977 | - A value of `lambda' enables Transient Mark mode temporarily. |
5978 | It is disabled again after any subsequent action that would | |
5979 | normally deactivate the mark (e.g. buffer modification). | |
5980 | ||
5981 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5982 | temporarily. After any subsequent point motion command that is | |
5983 | not shift-translated, or any other action that would normally | |
5984 | deactivate the mark (e.g. buffer modification), the value of | |
5985 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5986 | Vtransient_mark_mode = Qnil; |
5987 | ||
29208e82 | 5988 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 5989 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5990 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5991 | text properties. If the value is a list, disregard `buffer-read-only' | |
5992 | and disregard a `read-only' text property if the property value | |
5993 | is a member of the list. */); | |
a96b68f1 RS |
5994 | Vinhibit_read_only = Qnil; |
5995 | ||
4b4deea2 | 5996 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5997 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5998 | Values are interpreted as follows: |
5999 | ||
b8dc613f JB |
6000 | t use the cursor specified for the frame |
6001 | nil don't display a cursor | |
6002 | box display a filled box cursor | |
6003 | hollow display a hollow box cursor | |
6004 | bar display a vertical bar cursor with default width | |
6005 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6006 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6007 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6008 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6009 | |
e08b1705 MR |
6010 | When the buffer is displayed in a non-selected window, the |
6011 | cursor's appearance is instead controlled by the variable | |
6012 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6013 | |
a3bbced0 | 6014 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6015 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6016 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6017 | The space is measured in pixels, and put below lines on graphic displays, |
6018 | see `display-graphic-p'. | |
60ebfdf3 | 6019 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6020 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6021 | |
0124c5bd | 6022 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6023 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6024 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6025 | If nil, only shows a cursor in the selected window. |
6026 | If t, displays a cursor related to the usual cursor type | |
6027 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6028 | You can also specify the cursor type as in the `cursor-type' variable. | |
6029 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6030 | |
29208e82 | 6031 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6032 | doc: /* List of functions called with no args to query before killing a buffer. |
6033 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6034 | |
6035 | If any of them returns nil, the buffer is not killed. Functions run by | |
6036 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6037 | Vkill_buffer_query_functions = Qnil; |
6038 | ||
29208e82 | 6039 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6040 | doc: /* Normal hook run before changing the major mode of a buffer. |
6041 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6042 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6043 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6044 | |
9397e56f MR |
6045 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6046 | doc: /* Hook run when the buffer list changes. | |
6047 | Functions running this hook are `get-buffer-create', | |
6048 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6049 | and `bury-buffer-internal'. */); |
9397e56f | 6050 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6051 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6052 | |
0dc88e60 | 6053 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6054 | defsubr (&Sbuffer_list); |
6055 | defsubr (&Sget_buffer); | |
6056 | defsubr (&Sget_file_buffer); | |
6057 | defsubr (&Sget_buffer_create); | |
336cd056 | 6058 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6059 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6060 | defsubr (&Sbuffer_name); |
1ab256cb | 6061 | defsubr (&Sbuffer_file_name); |
336cd056 | 6062 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6063 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6064 | defsubr (&Sbuffer_local_variables); |
6065 | defsubr (&Sbuffer_modified_p); | |
6066 | defsubr (&Sset_buffer_modified_p); | |
6067 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6068 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6069 | defsubr (&Srename_buffer); |
6070 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6071 | defsubr (&Sbuffer_enable_undo); |
6072 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6073 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6074 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6075 | defsubr (&Scurrent_buffer); |
6076 | defsubr (&Sset_buffer); | |
6077 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6078 | defsubr (&Serase_buffer); |
13cda5f9 | 6079 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6080 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6081 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6082 | |
52f8ec73 | 6083 | defsubr (&Soverlayp); |
2eec3b4e RS |
6084 | defsubr (&Smake_overlay); |
6085 | defsubr (&Sdelete_overlay); | |
6086 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6087 | defsubr (&Soverlay_start); |
6088 | defsubr (&Soverlay_end); | |
6089 | defsubr (&Soverlay_buffer); | |
6090 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6091 | defsubr (&Soverlays_at); |
74514898 | 6092 | defsubr (&Soverlays_in); |
2eec3b4e | 6093 | defsubr (&Snext_overlay_change); |
239c932b | 6094 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6095 | defsubr (&Soverlay_recenter); |
6096 | defsubr (&Soverlay_lists); | |
6097 | defsubr (&Soverlay_get); | |
6098 | defsubr (&Soverlay_put); | |
a8c21b48 | 6099 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6100 | } |
6101 | ||
dfcf069d | 6102 | void |
d3da34e0 | 6103 | keys_of_buffer (void) |
1ab256cb RM |
6104 | { |
6105 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6106 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6107 | |
6108 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6109 | initialized when that function gets called. */ | |
d67b4f80 | 6110 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6111 | } |