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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; | |
4b4deea2 | 373 | BVAR (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. */ | |
4b4deea2 TT |
382 | BVAR (b, pt_marker) = Qnil; |
383 | BVAR (b, begv_marker) = Qnil; | |
384 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 385 | |
cd265ca6 | 386 | name = Fcopy_sequence (buffer_or_name); |
ad8c997f | 387 | string_set_intervals (name, NULL); |
4b4deea2 | 388 | BVAR (b, name) = name; |
04ae1b48 | 389 | |
4b4deea2 | 390 | BVAR (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 | |
4b4deea2 | 395 | BVAR (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. */ | |
8a05d57a | 484 | BVAR (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; | |
4b4deea2 | 587 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
588 | |
589 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 590 | b->header.next.buffer = all_buffers; |
336cd056 RS |
591 | all_buffers = b; |
592 | ||
593 | name = Fcopy_sequence (name); | |
ad8c997f | 594 | string_set_intervals (name, NULL); |
4b4deea2 | 595 | BVAR (b, name) = name; |
336cd056 RS |
596 | |
597 | reset_buffer (b); | |
13de9290 | 598 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
599 | |
600 | /* Put this in the alist of all live buffers. */ | |
601 | XSETBUFFER (buf, b); | |
602 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
603 | ||
4b4deea2 | 604 | BVAR (b, mark) = Fmake_marker (); |
336cd056 | 605 | |
abc9d959 | 606 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 607 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 608 | |
336cd056 | 609 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 610 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 611 | { |
2aa46d6c CY |
612 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
613 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 614 | |
52b852c7 | 615 | BVAR (b->base_buffer, pt_marker) |
657924ff DA |
616 | = build_marker (b->base_buffer, b->base_buffer->pt, b->base_buffer->pt_byte); |
617 | ||
618 | BVAR (b->base_buffer, begv_marker) | |
619 | = build_marker (b->base_buffer, b->base_buffer->begv, b->base_buffer->begv_byte); | |
cffc6f3b | 620 | |
657924ff DA |
621 | BVAR (b->base_buffer, zv_marker) |
622 | = build_marker (b->base_buffer, b->base_buffer->zv, b->base_buffer->zv_byte); | |
cffc6f3b | 623 | |
4b4deea2 | 624 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
625 | } |
626 | ||
7e9d5818 GM |
627 | if (NILP (clone)) |
628 | { | |
629 | /* Give the indirect buffer markers for its narrowing. */ | |
657924ff DA |
630 | BVAR (b, pt_marker) = build_marker (b, b->pt, b->pt_byte); |
631 | BVAR (b, begv_marker) = build_marker (b, b->begv, b->begv_byte); | |
632 | BVAR (b, zv_marker) = build_marker (b, b->zv, b->zv_byte); | |
4b4deea2 | 633 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
634 | } |
635 | else | |
7fa57e45 RS |
636 | { |
637 | struct buffer *old_b = current_buffer; | |
638 | ||
639 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
640 | BVAR (b, filename) = Qnil; |
641 | BVAR (b, file_truename) = Qnil; | |
642 | BVAR (b, display_count) = make_number (0); | |
643 | BVAR (b, backed_up) = Qnil; | |
644 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
645 | set_buffer_internal_1 (b); |
646 | Fset (intern ("buffer-save-without-query"), Qnil); | |
647 | Fset (intern ("buffer-file-number"), Qnil); | |
648 | Fset (intern ("buffer-stale-function"), Qnil); | |
649 | set_buffer_internal_1 (old_b); | |
650 | } | |
336cd056 | 651 | |
9397e56f MR |
652 | /* Run buffer-list-update-hook. */ |
653 | if (!NILP (Vrun_hooks)) | |
654 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
655 | ||
a9ee7a59 | 656 | return buf; |
1ab256cb RM |
657 | } |
658 | ||
041a49a6 DA |
659 | /* Mark OV as no longer associated with B. */ |
660 | ||
661 | static void | |
662 | drop_overlay (struct buffer *b, struct Lisp_Overlay *ov) | |
663 | { | |
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 | { |
4b4deea2 TT |
707 | BVAR (b, filename) = Qnil; |
708 | BVAR (b, file_truename) = Qnil; | |
709 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
e9a9ae03 | 710 | b->modtime = make_emacs_time (0, UNKNOWN_MODTIME_NSECS); |
58b963f7 | 711 | b->modtime_size = -1; |
4b4deea2 | 712 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 713 | b->last_window_start = 1; |
8b264726 | 714 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
715 | b->clip_changed = 0; |
716 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 717 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 718 | BUF_AUTOSAVE_MODIFF (b) = 0; |
d311d28c | 719 | b->auto_save_failure_time = 0; |
4b4deea2 TT |
720 | BVAR (b, auto_save_file_name) = Qnil; |
721 | BVAR (b, read_only) = Qnil; | |
4cb3e6b3 DA |
722 | buffer_set_overlays (b, NULL, OV_BEFORE); |
723 | buffer_set_overlays (b, NULL, OV_AFTER); | |
c2d5b10f | 724 | b->overlay_center = BEG; |
4b4deea2 TT |
725 | BVAR (b, mark_active) = Qnil; |
726 | BVAR (b, point_before_scroll) = Qnil; | |
727 | BVAR (b, file_format) = Qnil; | |
728 | BVAR (b, auto_save_file_format) = Qt; | |
729 | BVAR (b, last_selected_window) = Qnil; | |
730 | XSETINT (BVAR (b, display_count), 0); | |
731 | BVAR (b, display_time) = Qnil; | |
732 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
733 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
734 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
735 | |
736 | b->display_error_modiff = 0; | |
1ab256cb RM |
737 | } |
738 | ||
bcd40520 RS |
739 | /* Reset buffer B's local variables info. |
740 | Don't use this on a buffer that has already been in use; | |
741 | it does not treat permanent locals consistently. | |
13de9290 RS |
742 | Instead, use Fkill_all_local_variables. |
743 | ||
3709505e | 744 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
745 | buffer-local variables. If PERMANENT_TOO is 0, |
746 | we preserve those. */ | |
bcd40520 | 747 | |
13de9290 | 748 | static void |
d3da34e0 | 749 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
750 | { |
751 | register int offset; | |
7c02e886 | 752 | int i; |
1ab256cb RM |
753 | |
754 | /* Reset the major mode to Fundamental, together with all the | |
755 | things that depend on the major mode. | |
756 | default-major-mode is handled at a higher level. | |
757 | We ignore it here. */ | |
4b4deea2 TT |
758 | BVAR (b, major_mode) = Qfundamental_mode; |
759 | BVAR (b, keymap) = Qnil; | |
760 | BVAR (b, mode_name) = QSFundamental; | |
761 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
762 | |
763 | /* If the standard case table has been altered and invalidated, | |
764 | fix up its insides first. */ | |
765 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
766 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
767 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
768 | Fset_standard_case_table (Vascii_downcase_table); | |
769 | ||
4b4deea2 TT |
770 | BVAR (b, downcase_table) = Vascii_downcase_table; |
771 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
772 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
773 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
774 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 775 | |
13de9290 | 776 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 777 | if (permanent_too) |
4b4deea2 | 778 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
779 | else |
780 | { | |
2f7a359d | 781 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 782 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 783 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
784 | { |
785 | /* If permanent-local, keep it. */ | |
786 | last = tmp; | |
787 | if (EQ (prop, Qpermanent_local_hook)) | |
788 | { | |
789 | /* This is a partially permanent hook variable. | |
790 | Preserve only the elements that want to be preserved. */ | |
791 | Lisp_Object list, newlist; | |
792 | list = XCDR (XCAR (tmp)); | |
793 | if (!CONSP (list)) | |
794 | newlist = list; | |
795 | else | |
796 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
797 | { | |
798 | Lisp_Object elt = XCAR (list); | |
799 | /* Preserve element ELT if it's t, | |
800 | if it is a function with a `permanent-local-hook' property, | |
801 | or if it's not a symbol. */ | |
802 | if (! SYMBOLP (elt) | |
803 | || EQ (elt, Qt) | |
804 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
805 | newlist = Fcons (elt, newlist); | |
806 | } | |
807 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
808 | } | |
809 | } | |
810 | /* Delete this local variable. */ | |
3709505e | 811 | else if (NILP (last)) |
4b4deea2 | 812 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
813 | else |
814 | XSETCDR (last, XCDR (tmp)); | |
815 | } | |
816 | ||
7313acd0 | 817 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 818 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 819 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb | 820 | |
36429c89 | 821 | /* For each slot that has a default value, copy that into the slot. */ |
52b852c7 | 822 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
aab80822 | 823 | { |
7313acd0 | 824 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
825 | if ((idx > 0 |
826 | && (permanent_too | |
ce5b453a | 827 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 828 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 829 | } |
1ab256cb RM |
830 | } |
831 | ||
01050cb5 RM |
832 | /* We split this away from generate-new-buffer, because rename-buffer |
833 | and set-visited-file-name ought to be able to use this to really | |
834 | rename the buffer properly. */ | |
835 | ||
a7ca3326 | 836 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 837 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 838 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
839 | If there is no live buffer named NAME, then return NAME. |
840 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 841 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf | 842 | Optional second argument IGNORE specifies a name that is okay to use (if |
8e4fd1e1 GM |
843 | it is in the sequence to be tried) even if a buffer with that name exists. |
844 | ||
845 | If NAME begins with a space (i.e., a buffer that is not normally | |
846 | visible to users), then if buffer NAME already exists a random number | |
847 | is first appended to NAME, to speed up finding a non-existent buffer. */) | |
5842a27b | 848 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb | 849 | { |
8e4fd1e1 | 850 | register Lisp_Object gentemp, tem, tem2; |
d311d28c PE |
851 | ptrdiff_t count; |
852 | char number[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"]; | |
1ab256cb | 853 | |
b7826503 | 854 | CHECK_STRING (name); |
1ab256cb | 855 | |
6b61353c KH |
856 | tem = Fstring_equal (name, ignore); |
857 | if (!NILP (tem)) | |
858 | return name; | |
1ab256cb | 859 | tem = Fget_buffer (name); |
265a9e55 | 860 | if (NILP (tem)) |
01050cb5 | 861 | return name; |
1ab256cb | 862 | |
8e4fd1e1 GM |
863 | if (!strncmp (SSDATA (name), " ", 1)) /* see bug#1229 */ |
864 | { | |
865 | /* Note fileio.c:make_temp_name does random differently. */ | |
a8290ec3 | 866 | tem2 = concat2 (name, make_formatted_string |
52b852c7 | 867 | (number, "-%"pI"d", |
a8290ec3 | 868 | XFASTINT (Frandom (make_number (999999))))); |
8e4fd1e1 GM |
869 | tem = Fget_buffer (tem2); |
870 | if (NILP (tem)) | |
871 | return tem2; | |
872 | } | |
873 | else | |
874 | tem2 = name; | |
875 | ||
1ab256cb RM |
876 | count = 1; |
877 | while (1) | |
878 | { | |
a8290ec3 DA |
879 | gentemp = concat2 (tem2, make_formatted_string |
880 | (number, "<%"pD"d>", ++count)); | |
638e4fc3 | 881 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
882 | if (!NILP (tem)) |
883 | return gentemp; | |
1ab256cb | 884 | tem = Fget_buffer (gentemp); |
265a9e55 | 885 | if (NILP (tem)) |
01050cb5 | 886 | return gentemp; |
1ab256cb RM |
887 | } |
888 | } | |
889 | ||
890 | \f | |
a7ca3326 | 891 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 892 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
893 | BUFFER defaults to the current buffer. |
894 | Return nil if BUFFER has been killed. */) | |
5842a27b | 895 | (register Lisp_Object buffer) |
1ab256cb | 896 | { |
265a9e55 | 897 | if (NILP (buffer)) |
4b4deea2 | 898 | return BVAR (current_buffer, name); |
b7826503 | 899 | CHECK_BUFFER (buffer); |
4b4deea2 | 900 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
901 | } |
902 | ||
a7ca3326 | 903 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
904 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
905 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 906 | (register Lisp_Object buffer) |
1ab256cb | 907 | { |
265a9e55 | 908 | if (NILP (buffer)) |
4b4deea2 | 909 | return BVAR (current_buffer, filename); |
b7826503 | 910 | CHECK_BUFFER (buffer); |
4b4deea2 | 911 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
912 | } |
913 | ||
336cd056 RS |
914 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
915 | 0, 1, 0, | |
7ee72033 | 916 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
917 | If BUFFER is not indirect, return nil. |
918 | BUFFER defaults to the current buffer. */) | |
5842a27b | 919 | (register Lisp_Object buffer) |
336cd056 RS |
920 | { |
921 | struct buffer *base; | |
922 | Lisp_Object base_buffer; | |
923 | ||
924 | if (NILP (buffer)) | |
925 | base = current_buffer->base_buffer; | |
926 | else | |
927 | { | |
b7826503 | 928 | CHECK_BUFFER (buffer); |
336cd056 RS |
929 | base = XBUFFER (buffer)->base_buffer; |
930 | } | |
931 | ||
932 | if (! base) | |
933 | return Qnil; | |
934 | XSETBUFFER (base_buffer, base); | |
935 | return base_buffer; | |
936 | } | |
937 | ||
a7ca3326 | 938 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 939 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
940 | doc: /* Return the value of VARIABLE in BUFFER. |
941 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 942 | is the default binding of the variable. */) |
5842a27b | 943 | (register Lisp_Object variable, register Lisp_Object buffer) |
5f2c76c6 CY |
944 | { |
945 | register Lisp_Object result = buffer_local_value_1 (variable, buffer); | |
946 | ||
947 | if (EQ (result, Qunbound)) | |
948 | xsignal1 (Qvoid_variable, variable); | |
949 | ||
950 | return result; | |
951 | } | |
952 | ||
953 | ||
954 | /* Like Fbuffer_local_value, but return Qunbound if the variable is | |
955 | locally unbound. */ | |
956 | ||
957 | Lisp_Object | |
958 | buffer_local_value_1 (Lisp_Object variable, Lisp_Object buffer) | |
79aa712d RS |
959 | { |
960 | register struct buffer *buf; | |
961 | register Lisp_Object result; | |
ad97b375 | 962 | struct Lisp_Symbol *sym; |
79aa712d | 963 | |
5e2ad10b | 964 | CHECK_SYMBOL (variable); |
ae69175b | 965 | CHECK_BUFFER (buffer); |
79aa712d | 966 | buf = XBUFFER (buffer); |
ce5b453a | 967 | sym = XSYMBOL (variable); |
79aa712d | 968 | |
ce5b453a SM |
969 | start: |
970 | switch (sym->redirect) | |
f0bac7de | 971 | { |
ce5b453a SM |
972 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
973 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
974 | case SYMBOL_LOCALIZED: | |
975 | { /* Look in local_var_alist. */ | |
976 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
977 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 978 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
979 | if (!NILP (result)) |
980 | { | |
981 | if (blv->fwd) | |
982 | { /* What binding is loaded right now? */ | |
983 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 984 | |
ce5b453a SM |
985 | /* The value of the currently loaded binding is not |
986 | stored in it, but rather in the realvalue slot. | |
987 | Store that value into the binding it belongs to | |
988 | in case that is the one we are about to use. */ | |
f0bac7de | 989 | |
ce5b453a SM |
990 | XSETCDR (current_alist_element, |
991 | do_symval_forwarding (blv->fwd)); | |
992 | } | |
993 | /* Now get the (perhaps updated) value out of the binding. */ | |
994 | result = XCDR (result); | |
995 | } | |
996 | else | |
997 | result = Fdefault_value (variable); | |
998 | break; | |
999 | } | |
1000 | case SYMBOL_FORWARDED: | |
1001 | { | |
1002 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
1003 | if (BUFFER_OBJFWDP (fwd)) | |
1004 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
1005 | else | |
1006 | result = Fdefault_value (variable); | |
1007 | break; | |
1008 | } | |
1009 | default: abort (); | |
f0bac7de | 1010 | } |
79aa712d | 1011 | |
5f2c76c6 | 1012 | return result; |
79aa712d RS |
1013 | } |
1014 | ||
e1688f54 | 1015 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1016 | buffer BUF. That is, don't include the variables maintained |
8a05d57a AS |
1017 | in special slots in the buffer object. |
1018 | If CLONE is zero elements of the form (VAR . unbound) are replaced | |
1019 | by VAR. */ | |
e1688f54 RS |
1020 | |
1021 | static Lisp_Object | |
8a05d57a | 1022 | buffer_lisp_local_variables (struct buffer *buf, int clone) |
e1688f54 RS |
1023 | { |
1024 | Lisp_Object result = Qnil; | |
1025 | register Lisp_Object tail; | |
4b4deea2 | 1026 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1027 | { |
1028 | Lisp_Object val, elt; | |
1029 | ||
1030 | elt = XCAR (tail); | |
1031 | ||
1032 | /* Reference each variable in the alist in buf. | |
1033 | If inquiring about the current buffer, this gets the current values, | |
1034 | so store them into the alist so the alist is up to date. | |
1035 | If inquiring about some other buffer, this swaps out any values | |
1036 | for that buffer, making the alist up to date automatically. */ | |
1037 | val = find_symbol_value (XCAR (elt)); | |
1038 | /* Use the current buffer value only if buf is the current buffer. */ | |
1039 | if (buf != current_buffer) | |
1040 | val = XCDR (elt); | |
1041 | ||
8a05d57a | 1042 | result = Fcons (!clone && EQ (val, Qunbound) |
0992bd9c CY |
1043 | ? XCAR (elt) |
1044 | : Fcons (XCAR (elt), val), | |
1045 | result); | |
e1688f54 RS |
1046 | } |
1047 | ||
1048 | return result; | |
1049 | } | |
1050 | ||
1ab256cb | 1051 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1052 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1053 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1054 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1055 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1056 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1057 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1058 | (register Lisp_Object buffer) |
1ab256cb RM |
1059 | { |
1060 | register struct buffer *buf; | |
553defa4 | 1061 | register Lisp_Object result; |
1ab256cb | 1062 | |
265a9e55 | 1063 | if (NILP (buffer)) |
1ab256cb RM |
1064 | buf = current_buffer; |
1065 | else | |
1066 | { | |
b7826503 | 1067 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1068 | buf = XBUFFER (buffer); |
1069 | } | |
1070 | ||
8a05d57a | 1071 | result = buffer_lisp_local_variables (buf, 0); |
1ab256cb | 1072 | |
1ab256cb RM |
1073 | /* Add on all the variables stored in special slots. */ |
1074 | { | |
7c02e886 | 1075 | int offset, idx; |
1ab256cb | 1076 | |
52b852c7 | 1077 | FOR_EACH_PER_BUFFER_OBJECT_AT (offset) |
1ab256cb | 1078 | { |
7313acd0 GM |
1079 | idx = PER_BUFFER_IDX (offset); |
1080 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1081 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1082 | { |
1083 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1084 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1085 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1086 | result); | |
1087 | } | |
1ab256cb RM |
1088 | } |
1089 | } | |
553defa4 RS |
1090 | |
1091 | return result; | |
1ab256cb | 1092 | } |
1ab256cb | 1093 | \f |
a7ca3326 | 1094 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1095 | 0, 1, 0, |
7ee72033 MB |
1096 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1097 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1098 | (register Lisp_Object buffer) |
1ab256cb RM |
1099 | { |
1100 | register struct buffer *buf; | |
265a9e55 | 1101 | if (NILP (buffer)) |
1ab256cb RM |
1102 | buf = current_buffer; |
1103 | else | |
1104 | { | |
b7826503 | 1105 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1106 | buf = XBUFFER (buffer); |
1107 | } | |
1108 | ||
336cd056 | 1109 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1110 | } |
1111 | ||
a7ca3326 | 1112 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1113 | 1, 1, 0, |
7ee72033 MB |
1114 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1115 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1116 | (register Lisp_Object flag) |
1ab256cb RM |
1117 | { |
1118 | register int already; | |
1119 | register Lisp_Object fn; | |
8ec01c70 | 1120 | Lisp_Object buffer, window; |
1ab256cb RM |
1121 | |
1122 | #ifdef CLASH_DETECTION | |
1123 | /* If buffer becoming modified, lock the file. | |
1124 | If buffer becoming unmodified, unlock the file. */ | |
1125 | ||
4b4deea2 | 1126 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1127 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1128 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1129 | { |
336cd056 | 1130 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1131 | if (!already && !NILP (flag)) |
1ab256cb | 1132 | lock_file (fn); |
265a9e55 | 1133 | else if (already && NILP (flag)) |
1ab256cb RM |
1134 | unlock_file (fn); |
1135 | } | |
1136 | #endif /* CLASH_DETECTION */ | |
1137 | ||
0b5397c2 SM |
1138 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1139 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1140 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1141 | modify SAVE_MODIFF to affect one, we may affect the other | |
1142 | as well. | |
1143 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1144 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1145 | recent-auto-save-p from t to nil. | |
1146 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1147 | we risk changing recent-auto-save-p from nil to t. */ | |
1148 | SAVE_MODIFF = (NILP (flag) | |
1149 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1150 | ? MODIFF | |
1151 | /* Let's try to preserve recent-auto-save-p. */ | |
1152 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1153 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1154 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1155 | or increase MODIFF. */ | |
1156 | : MODIFF++); | |
177c0ea7 | 1157 | |
8ec01c70 GM |
1158 | /* Set update_mode_lines only if buffer is displayed in some window. |
1159 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1160 | state by recording/restoring the state around blocks of code. | |
1161 | Setting update_mode_lines makes redisplay consider all windows | |
1162 | (on all frames). Stealth fontification of buffers not displayed | |
1163 | would incur additional redisplay costs if we'd set | |
1164 | update_modes_lines unconditionally. | |
1165 | ||
1166 | Ideally, I think there should be another mechanism for fontifying | |
1167 | buffers without "modifying" buffers, or redisplay should be | |
1168 | smarter about updating the `*' in mode lines. --gerd */ | |
1169 | XSETBUFFER (buffer, current_buffer); | |
1170 | window = Fget_buffer_window (buffer, Qt); | |
1171 | if (WINDOWP (window)) | |
d57b83b3 GM |
1172 | { |
1173 | ++update_mode_lines; | |
1174 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1175 | } | |
177c0ea7 | 1176 | |
1ab256cb RM |
1177 | return flag; |
1178 | } | |
1179 | ||
a8c21b48 GM |
1180 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1181 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1182 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1183 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1184 | state of the current buffer. Use with care. */) |
5842a27b | 1185 | (Lisp_Object flag) |
a8c21b48 GM |
1186 | { |
1187 | #ifdef CLASH_DETECTION | |
1188 | Lisp_Object fn; | |
177c0ea7 | 1189 | |
a8c21b48 GM |
1190 | /* If buffer becoming modified, lock the file. |
1191 | If buffer becoming unmodified, unlock the file. */ | |
1192 | ||
4b4deea2 | 1193 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1194 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1195 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1196 | { |
1197 | int already = SAVE_MODIFF < MODIFF; | |
1198 | if (!already && !NILP (flag)) | |
1199 | lock_file (fn); | |
1200 | else if (already && NILP (flag)) | |
1201 | unlock_file (fn); | |
1202 | } | |
1203 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1204 | |
a8c21b48 GM |
1205 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1206 | return flag; | |
1207 | } | |
1208 | ||
1ab256cb | 1209 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1210 | 0, 1, 0, |
7ee72033 | 1211 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1212 | Each buffer has a tick counter which is incremented each time the |
1213 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1214 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1215 | (register Lisp_Object buffer) |
1ab256cb RM |
1216 | { |
1217 | register struct buffer *buf; | |
265a9e55 | 1218 | if (NILP (buffer)) |
1ab256cb RM |
1219 | buf = current_buffer; |
1220 | else | |
1221 | { | |
b7826503 | 1222 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1223 | buf = XBUFFER (buffer); |
1224 | } | |
1225 | ||
1226 | return make_number (BUF_MODIFF (buf)); | |
1227 | } | |
3e145152 CY |
1228 | |
1229 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1230 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1231 | doc: /* Return BUFFER's character-change tick counter. | |
1232 | Each buffer has a character-change tick counter, which is set to the | |
1233 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1234 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1235 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1236 | you can tell whether a character change occurred in that buffer in |
1237 | between these calls. No argument or nil as argument means use current | |
1238 | buffer as BUFFER. */) | |
5842a27b | 1239 | (register Lisp_Object buffer) |
3e145152 CY |
1240 | { |
1241 | register struct buffer *buf; | |
1242 | if (NILP (buffer)) | |
1243 | buf = current_buffer; | |
1244 | else | |
1245 | { | |
1246 | CHECK_BUFFER (buffer); | |
1247 | buf = XBUFFER (buffer); | |
1248 | } | |
1249 | ||
1250 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1251 | } | |
1ab256cb | 1252 | \f |
01050cb5 | 1253 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1254 | "(list (read-string \"Rename buffer (to new name): \" \ |
1255 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1256 | current-prefix-arg)", | |
7ee72033 | 1257 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1258 | If second arg UNIQUE is nil or omitted, it is an error if a |
1259 | buffer named NEWNAME already exists. | |
1260 | If UNIQUE is non-nil, come up with a new name using | |
1261 | `generate-new-buffer-name'. | |
1262 | Interactively, you can set UNIQUE with a prefix argument. | |
1263 | We return the name we actually gave the buffer. | |
7ee72033 | 1264 | This does not change the name of the visited file (if any). */) |
5842a27b | 1265 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1266 | { |
1267 | register Lisp_Object tem, buf; | |
1268 | ||
b7826503 | 1269 | CHECK_STRING (newname); |
d59698c4 | 1270 | |
d5db4077 | 1271 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1272 | error ("Empty string is invalid as a buffer name"); |
1273 | ||
489c043a | 1274 | tem = Fget_buffer (newname); |
265a9e55 | 1275 | if (!NILP (tem)) |
01050cb5 | 1276 | { |
8801a864 KR |
1277 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1278 | rename the buffer automatically so you can create another | |
1279 | with the original name. It makes UNIQUE equivalent to | |
1280 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1281 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1282 | return BVAR (current_buffer, name); |
3bd779aa | 1283 | if (!NILP (unique)) |
4b4deea2 | 1284 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1285 | else |
d5db4077 | 1286 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1287 | } |
1ab256cb | 1288 | |
4b4deea2 | 1289 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1290 | |
1291 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1292 | any windows displaying current_buffer will stay unchanged. */ | |
1293 | update_mode_lines++; | |
1294 | ||
67180c6a | 1295 | XSETBUFFER (buf, current_buffer); |
489c043a | 1296 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1297 | if (NILP (BVAR (current_buffer, filename)) |
1298 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1299 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1300 | |
1301 | /* Run buffer-list-update-hook. */ | |
1302 | if (!NILP (Vrun_hooks)) | |
1303 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1304 | ||
fb5eba9c | 1305 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1306 | return BVAR (current_buffer, name); |
1ab256cb RM |
1307 | } |
1308 | ||
a7ca3326 | 1309 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1310 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1311 | Buffers not visible in windows are preferred to visible buffers, unless |
1312 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1313 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1314 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1315 | frame's buffer list. | |
1316 | ||
1317 | The buffer is found by scanning the selected or specified frame's buffer | |
1318 | list first, followed by the list of all buffers. If no other buffer | |
1319 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1320 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1321 | { |
9397e56f MR |
1322 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1323 | Lisp_Object tail, buf, pred; | |
1324 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1325 | |
773fbdb9 | 1326 | if (NILP (frame)) |
9ba9623d | 1327 | frame = selected_frame; |
773fbdb9 | 1328 | |
d234d13e JL |
1329 | CHECK_FRAME (frame); |
1330 | ||
773fbdb9 | 1331 | pred = frame_buffer_predicate (frame); |
9397e56f | 1332 | /* Consider buffers that have been seen in the frame first. */ |
e69b0960 | 1333 | tail = XFRAME (frame)->buffer_list; |
9397e56f | 1334 | for (; CONSP (tail); tail = XCDR (tail)) |
7962a441 | 1335 | { |
9397e56f MR |
1336 | buf = XCAR (tail); |
1337 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1338 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1339 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1340 | /* If the frame has a buffer_predicate, disregard buffers that | |
1341 | don't fit the predicate. */ | |
1342 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1343 | { | |
1344 | if (!NILP (visible_ok) | |
1345 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1346 | return buf; | |
1347 | else if (NILP (notsogood)) | |
1348 | notsogood = buf; | |
1349 | } | |
7962a441 | 1350 | } |
7962a441 | 1351 | |
9397e56f MR |
1352 | /* Consider alist of all buffers next. */ |
1353 | tail = Vbuffer_alist; | |
6d70a280 | 1354 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1355 | { |
6d70a280 | 1356 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1357 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1358 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1359 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1360 | /* If the frame has a buffer_predicate, disregard buffers that | |
1361 | don't fit the predicate. */ | |
1362 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1363 | { | |
1364 | if (!NILP (visible_ok) | |
1365 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1366 | return buf; | |
1367 | else if (NILP (notsogood)) | |
1368 | notsogood = buf; | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | if (!NILP (notsogood)) | |
1373 | return notsogood; | |
1374 | else | |
1375 | { | |
1376 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1377 | if (NILP (buf)) |
04ae1b48 | 1378 | { |
9397e56f MR |
1379 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1380 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1381 | } |
9397e56f MR |
1382 | return buf; |
1383 | } | |
1384 | } | |
04ae1b48 | 1385 | |
9397e56f MR |
1386 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1387 | pay attention to any frame-local buffer lists, doesn't care about | |
1388 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1389 | ||
1390 | Lisp_Object | |
1391 | other_buffer_safely (Lisp_Object buffer) | |
1392 | { | |
1393 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1394 | Lisp_Object tail, buf; | |
1395 | ||
1396 | tail = Vbuffer_alist; | |
1397 | for (; CONSP (tail); tail = XCDR (tail)) | |
1398 | { | |
1399 | buf = Fcdr (XCAR (tail)); | |
1400 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1401 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1402 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1403 | return buf; |
1ab256cb | 1404 | } |
9397e56f | 1405 | |
dba1a30a GM |
1406 | buf = Fget_buffer (build_string ("*scratch*")); |
1407 | if (NILP (buf)) | |
1408 | { | |
1409 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1410 | Fset_buffer_major_mode (buf); | |
1411 | } | |
9397e56f | 1412 | |
89132f25 | 1413 | return buf; |
1ab256cb RM |
1414 | } |
1415 | \f | |
a7ca3326 | 1416 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1417 | 0, 1, "", |
7ee72033 MB |
1418 | doc: /* Start keeping undo information for buffer BUFFER. |
1419 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1420 | (register Lisp_Object buffer) |
1ab256cb | 1421 | { |
ffd56f97 | 1422 | Lisp_Object real_buffer; |
1ab256cb | 1423 | |
ffd56f97 | 1424 | if (NILP (buffer)) |
67180c6a | 1425 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1426 | else |
1427 | { | |
ffd56f97 JB |
1428 | real_buffer = Fget_buffer (buffer); |
1429 | if (NILP (real_buffer)) | |
1430 | nsberror (buffer); | |
1ab256cb RM |
1431 | } |
1432 | ||
4b4deea2 TT |
1433 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1434 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1435 | |
1436 | return Qnil; | |
1437 | } | |
1438 | ||
9cd47b72 DA |
1439 | /* Truncate undo list and shrink the gap of BUFFER. */ |
1440 | ||
1441 | int | |
1442 | compact_buffer (struct buffer *buffer) | |
1443 | { | |
9928463d DA |
1444 | /* Verify indirection counters. */ |
1445 | if (buffer->base_buffer) | |
1446 | { | |
1447 | eassert (buffer->indirections == -1); | |
1448 | eassert (buffer->base_buffer->indirections > 0); | |
1449 | } | |
1450 | else | |
1451 | eassert (buffer->indirections >= 0); | |
1452 | ||
9cd47b72 DA |
1453 | /* Skip dead buffers, indirect buffers and buffers |
1454 | which aren't changed since last compaction. */ | |
e34f7f79 | 1455 | if (!NILP (buffer->INTERNAL_FIELD (name)) |
9cd47b72 DA |
1456 | && (buffer->base_buffer == NULL) |
1457 | && (buffer->text->compact != buffer->text->modiff)) | |
1458 | { | |
1459 | /* If a buffer's undo list is Qt, that means that undo is | |
1460 | turned off in that buffer. Calling truncate_undo_list on | |
1461 | Qt tends to return NULL, which effectively turns undo back on. | |
1462 | So don't call truncate_undo_list if undo_list is Qt. */ | |
e34f7f79 | 1463 | if (!EQ (buffer->INTERNAL_FIELD (undo_list), Qt)) |
9cd47b72 DA |
1464 | truncate_undo_list (buffer); |
1465 | ||
1466 | /* Shrink buffer gaps. */ | |
1467 | if (!buffer->text->inhibit_shrinking) | |
1468 | { | |
1469 | /* If a buffer's gap size is more than 10% of the buffer | |
1470 | size, or larger than 2000 bytes, then shrink it | |
1471 | accordingly. Keep a minimum size of 20 bytes. */ | |
1472 | int size = min (2000, max (20, (buffer->text->z_byte / 10))); | |
1473 | ||
1474 | if (buffer->text->gap_size > size) | |
1475 | { | |
1476 | struct buffer *save_current = current_buffer; | |
1477 | current_buffer = buffer; | |
1478 | make_gap (-(buffer->text->gap_size - size)); | |
1479 | current_buffer = save_current; | |
1480 | } | |
1481 | } | |
1482 | buffer->text->compact = buffer->text->modiff; | |
1483 | return 1; | |
1484 | } | |
1485 | return 0; | |
1486 | } | |
1487 | ||
a7ca3326 | 1488 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
b7e8d081 | 1489 | doc: /* Kill the buffer specified by BUFFER-OR-NAME. |
c8804c4f MR |
1490 | The argument may be a buffer or the name of an existing buffer. |
1491 | Argument nil or omitted means kill the current buffer. Return t if the | |
1492 | buffer is actually killed, nil otherwise. | |
1493 | ||
b7e8d081 MR |
1494 | The functions in `kill-buffer-query-functions' are called with the |
1495 | buffer to be killed as the current buffer. If any of them returns nil, | |
1496 | the buffer is not killed. The hook `kill-buffer-hook' is run before the | |
1497 | buffer is actually killed. The buffer being killed will be current | |
1498 | while the hook is running. Functions called by any of these hooks are | |
1499 | supposed to not change the current buffer. | |
018ba359 PJ |
1500 | |
1501 | Any processes that have this buffer as the `process-buffer' are killed | |
b7e8d081 MR |
1502 | with SIGHUP. This function calls `replace-buffer-in-windows' for |
1503 | cleaning up all windows currently displaying the buffer to be killed. */) | |
5842a27b | 1504 | (Lisp_Object buffer_or_name) |
1ab256cb | 1505 | { |
c8804c4f | 1506 | Lisp_Object buffer; |
1ab256cb RM |
1507 | register struct buffer *b; |
1508 | register Lisp_Object tem; | |
1509 | register struct Lisp_Marker *m; | |
6af718a4 | 1510 | struct gcpro gcpro1; |
1ab256cb | 1511 | |
c8804c4f MR |
1512 | if (NILP (buffer_or_name)) |
1513 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1514 | else |
c8804c4f MR |
1515 | buffer = Fget_buffer (buffer_or_name); |
1516 | if (NILP (buffer)) | |
1517 | nsberror (buffer_or_name); | |
1ab256cb | 1518 | |
c8804c4f | 1519 | b = XBUFFER (buffer); |
1ab256cb | 1520 | |
4a4a9db5 | 1521 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1522 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1523 | return Qnil; |
1524 | ||
1ab256cb | 1525 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1526 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1527 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1528 | { |
c8804c4f | 1529 | GCPRO1 (buffer); |
5c4930b0 | 1530 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1531 | BVAR (b, name), make_number (0))); |
1ab256cb | 1532 | UNGCPRO; |
265a9e55 | 1533 | if (NILP (tem)) |
1ab256cb RM |
1534 | return Qnil; |
1535 | } | |
1536 | ||
dcdffbf6 | 1537 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1538 | { |
d311d28c | 1539 | ptrdiff_t count = SPECPDL_INDEX (); |
5b20caf0 | 1540 | Lisp_Object arglist[1]; |
1ab256cb RM |
1541 | |
1542 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1543 | set_buffer_internal (b); | |
dcdffbf6 RS |
1544 | |
1545 | /* First run the query functions; if any query is answered no, | |
1546 | don't kill the buffer. */ | |
5b20caf0 | 1547 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1548 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1549 | if (NILP (tem)) | |
5b20caf0 | 1550 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1551 | |
1552 | /* Then run the hooks. */ | |
f1597a3a | 1553 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1554 | unbind_to (count, Qnil); |
1555 | } | |
1556 | ||
b7e8d081 MR |
1557 | /* If the hooks have killed the buffer, exit now. */ |
1558 | if (NILP (BVAR (b, name))) | |
1559 | return Qt; | |
1560 | ||
1ab256cb RM |
1561 | /* We have no more questions to ask. Verify that it is valid |
1562 | to kill the buffer. This must be done after the questions | |
1563 | since anything can happen within do_yes_or_no_p. */ | |
1564 | ||
1565 | /* Don't kill the minibuffer now current. */ | |
d3d50620 | 1566 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1567 | return Qnil; |
1568 | ||
9928463d DA |
1569 | /* When we kill an ordinary buffer which shares it's buffer text |
1570 | with indirect buffer(s), we must kill indirect buffer(s) too. | |
336cd056 RS |
1571 | We do it at this stage so nothing terrible happens if they |
1572 | ask questions or their hooks get errors. */ | |
9928463d | 1573 | if (!b->base_buffer && b->indirections > 0) |
336cd056 RS |
1574 | { |
1575 | struct buffer *other; | |
1576 | ||
c8804c4f | 1577 | GCPRO1 (buffer); |
336cd056 | 1578 | |
52b852c7 | 1579 | FOR_EACH_BUFFER (other) |
d17337e5 | 1580 | if (other->base_buffer == b) |
336cd056 | 1581 | { |
8f54f30a PE |
1582 | Lisp_Object buf; |
1583 | XSETBUFFER (buf, other); | |
1584 | Fkill_buffer (buf); | |
336cd056 RS |
1585 | } |
1586 | ||
1587 | UNGCPRO; | |
b7e8d081 MR |
1588 | |
1589 | /* Exit if we now have killed the base buffer (Bug#11665). */ | |
1590 | if (NILP (BVAR (b, name))) | |
1591 | return Qt; | |
336cd056 | 1592 | } |
177c0ea7 | 1593 | |
56e2e794 MR |
1594 | /* Run replace_buffer_in_windows before making another buffer current |
1595 | since set-window-buffer-start-and-point will refuse to make another | |
1596 | buffer current if the selected window does not show the current | |
1597 | buffer. (Bug#10114) */ | |
1598 | replace_buffer_in_windows (buffer); | |
1599 | ||
b7e8d081 MR |
1600 | /* Exit if replacing the buffer in windows has killed our buffer. */ |
1601 | if (NILP (BVAR (b, name))) | |
1602 | return Qt; | |
1603 | ||
1604 | /* Make this buffer not be current. Exit if it is the sole visible | |
1605 | buffer. */ | |
1ab256cb RM |
1606 | if (b == current_buffer) |
1607 | { | |
c8804c4f | 1608 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1609 | Fset_buffer (tem); |
1610 | if (b == current_buffer) | |
1611 | return Qnil; | |
1612 | } | |
1613 | ||
b7e8d081 MR |
1614 | /* If the buffer now current is shown in the minibuffer and our buffer |
1615 | is the sole other buffer give up. */ | |
77270fac | 1616 | XSETBUFFER (tem, current_buffer); |
d3d50620 | 1617 | if (EQ (tem, XWINDOW (minibuf_window)->buffer) |
b7e8d081 MR |
1618 | && EQ (buffer, Fother_buffer (buffer, Qnil, Qnil))) |
1619 | return Qnil; | |
77270fac | 1620 | |
1ab256cb RM |
1621 | /* Now there is no question: we can kill the buffer. */ |
1622 | ||
1623 | #ifdef CLASH_DETECTION | |
1624 | /* Unlock this buffer's file, if it is locked. */ | |
1625 | unlock_buffer (b); | |
1626 | #endif /* CLASH_DETECTION */ | |
1627 | ||
c8804c4f MR |
1628 | GCPRO1 (buffer); |
1629 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1630 | UNGCPRO; |
1631 | ||
b7e8d081 MR |
1632 | /* Killing buffer processes may run sentinels which may have killed |
1633 | our buffer. */ | |
4b4deea2 | 1634 | if (NILP (BVAR (b, name))) |
b7e8d081 | 1635 | return Qt; |
49da74e6 | 1636 | |
9397e56f MR |
1637 | /* These may run Lisp code and into infinite loops (if someone |
1638 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1639 | frames_discard_buffer (buffer); |
1640 | ||
b93fb365 | 1641 | clear_charpos_cache (b); |
1ab256cb RM |
1642 | |
1643 | tem = Vinhibit_quit; | |
1644 | Vinhibit_quit = Qt; | |
9397e56f | 1645 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1646 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
b7e8d081 | 1647 | /* If replace_buffer_in_windows didn't do its job fix that now. */ |
9397e56f | 1648 | replace_buffer_in_windows_safely (buffer); |
1ab256cb RM |
1649 | Vinhibit_quit = tem; |
1650 | ||
9cf712eb RS |
1651 | /* Delete any auto-save file, if we saved it in this session. |
1652 | But not if the buffer is modified. */ | |
4b4deea2 | 1653 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1654 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1655 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1656 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1657 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1658 | { |
8f54f30a PE |
1659 | Lisp_Object delete; |
1660 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1661 | if (! NILP (delete)) | |
4b4deea2 | 1662 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1663 | } |
1664 | ||
b7e8d081 MR |
1665 | /* Deleting an auto-save file could have killed our buffer. */ |
1666 | if (NILP (BVAR (b, name))) | |
1667 | return Qt; | |
1668 | ||
4a4a9db5 KH |
1669 | if (b->base_buffer) |
1670 | { | |
1671 | /* Unchain all markers that belong to this indirect buffer. | |
1672 | Don't unchain the markers that belong to the base buffer | |
1673 | or its other indirect buffers. */ | |
65745fad | 1674 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1675 | { |
65745fad | 1676 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1677 | if (m->buffer == b) |
65745fad SM |
1678 | unchain_marker (m); |
1679 | m = next; | |
4a4a9db5 KH |
1680 | } |
1681 | } | |
1682 | else | |
1ab256cb | 1683 | { |
4a4a9db5 | 1684 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1685 | and leave them pointing nowhere. */ |
65745fad | 1686 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1687 | { |
65745fad | 1688 | struct Lisp_Marker *next = m->next; |
336cd056 | 1689 | m->buffer = 0; |
65745fad SM |
1690 | m->next = NULL; |
1691 | m = next; | |
336cd056 | 1692 | } |
65745fad | 1693 | BUF_MARKERS (b) = NULL; |
8707c1e5 | 1694 | buffer_set_intervals (b, NULL); |
336cd056 RS |
1695 | |
1696 | /* Perhaps we should explicitly free the interval tree here... */ | |
1697 | } | |
33f7013e | 1698 | |
2f3f993b RS |
1699 | /* Reset the local variables, so that this buffer's local values |
1700 | won't be protected from GC. They would be protected | |
e4769531 | 1701 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1702 | This gets rid of them for certain. */ |
1703 | swap_out_buffer_local_variables (b); | |
13de9290 | 1704 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1705 | |
4b4deea2 | 1706 | BVAR (b, name) = Qnil; |
336cd056 | 1707 | |
9ac0d9e0 | 1708 | BLOCK_INPUT; |
04e9897c DA |
1709 | if (b->base_buffer) |
1710 | { | |
1711 | /* Notify our base buffer that we don't share the text anymore. */ | |
1712 | eassert (b->indirections == -1); | |
1713 | b->base_buffer->indirections--; | |
1714 | eassert (b->base_buffer->indirections >= 0); | |
1715 | } | |
1716 | else | |
1717 | /* No one shares our buffer text, can free it. */ | |
b86af064 | 1718 | free_buffer_text (b); |
336cd056 | 1719 | |
28e969dd JB |
1720 | if (b->newline_cache) |
1721 | { | |
1722 | free_region_cache (b->newline_cache); | |
1723 | b->newline_cache = 0; | |
1724 | } | |
1725 | if (b->width_run_cache) | |
1726 | { | |
1727 | free_region_cache (b->width_run_cache); | |
1728 | b->width_run_cache = 0; | |
1729 | } | |
4b4deea2 | 1730 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1731 | UNBLOCK_INPUT; |
4b4deea2 | 1732 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1733 | |
9397e56f MR |
1734 | /* Run buffer-list-update-hook. */ |
1735 | if (!NILP (Vrun_hooks)) | |
1736 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1737 | ||
1ab256cb RM |
1738 | return Qt; |
1739 | } | |
1740 | \f | |
9397e56f MR |
1741 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1742 | we do this each time BUFFER is selected visibly, the more recently | |
1743 | selected buffers are always closer to the front of those lists. This | |
1744 | means that other_buffer is more likely to choose a relevant buffer. | |
1745 | ||
1746 | Note that this moves BUFFER to the front of the buffer lists of the | |
1747 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1748 | shown in the selected frame, consider the present behavior a feature. | |
1749 | `select-window' gets this right since it shows BUFFER in the selected | |
1750 | window when calling us. */ | |
1ab256cb | 1751 | |
01136e9b | 1752 | void |
9397e56f | 1753 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1754 | { |
4475bec4 | 1755 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1756 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1757 | |
9397e56f | 1758 | CHECK_BUFFER (buffer); |
1ab256cb | 1759 | |
9397e56f MR |
1760 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1761 | Don't allow quitting since this might leave the buffer list in an | |
1762 | inconsistent state. */ | |
1763 | tem = Vinhibit_quit; | |
1764 | Vinhibit_quit = Qt; | |
1765 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1766 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1767 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1768 | XSETCDR (aelt_cons, Vbuffer_alist); |
1769 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1770 | Vinhibit_quit = tem; |
1ab256cb | 1771 | |
9397e56f | 1772 | /* Update buffer list of selected frame. */ |
e69b0960 DA |
1773 | FSET (f, buffer_list, Fcons (buffer, Fdelq (buffer, f->buffer_list))); |
1774 | FSET (f, buried_buffer_list, Fdelq (buffer, f->buried_buffer_list)); | |
177c0ea7 | 1775 | |
9397e56f MR |
1776 | /* Run buffer-list-update-hook. */ |
1777 | if (!NILP (Vrun_hooks)) | |
1778 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1779 | } | |
7962a441 | 1780 | |
7962a441 | 1781 | |
e4ed06f1 CY |
1782 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1783 | buffer is killed. For the selected frame's buffer list this moves | |
1784 | BUFFER to its end even if it was never shown in that frame. If | |
96a72ee9 | 1785 | this happens we have a feature, hence `bury-buffer-internal' should be |
e4ed06f1 | 1786 | called only when BUFFER was shown in the selected frame. */ |
7962a441 | 1787 | |
e4ed06f1 CY |
1788 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1789 | 1, 1, 0, | |
1790 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1791 | (Lisp_Object buffer) |
1792 | { | |
4475bec4 | 1793 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1794 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1795 | |
9397e56f | 1796 | CHECK_BUFFER (buffer); |
177c0ea7 | 1797 | |
9397e56f MR |
1798 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1799 | Don't allow quitting since this might leave the buffer list in an | |
1800 | inconsistent state. */ | |
1801 | tem = Vinhibit_quit; | |
1802 | Vinhibit_quit = Qt; | |
1803 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1804 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1805 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1806 | XSETCDR (aelt_cons, Qnil); |
1807 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1808 | Vinhibit_quit = tem; |
1809 | ||
1810 | /* Update buffer lists of selected frame. */ | |
e69b0960 | 1811 | FSET (f, buffer_list, Fdelq (buffer, f->buffer_list)); |
edd74c35 | 1812 | FSET (f, buried_buffer_list, |
e69b0960 | 1813 | Fcons (buffer, Fdelq (buffer, f->buried_buffer_list))); |
9397e56f MR |
1814 | |
1815 | /* Run buffer-list-update-hook. */ | |
1816 | if (!NILP (Vrun_hooks)) | |
1817 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1818 | ||
e4ed06f1 | 1819 | return Qnil; |
1ab256cb RM |
1820 | } |
1821 | ||
a9ee7a59 | 1822 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1823 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1824 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1825 | according to `default-major-mode'. |
018ba359 | 1826 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1827 | the current buffer's major mode. */) |
5842a27b | 1828 | (Lisp_Object buffer) |
a9ee7a59 | 1829 | { |
d311d28c | 1830 | ptrdiff_t count; |
a9ee7a59 KH |
1831 | Lisp_Object function; |
1832 | ||
ea4fddd8 JB |
1833 | CHECK_BUFFER (buffer); |
1834 | ||
4b4deea2 TT |
1835 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1836 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1837 | function = find_symbol_value (intern ("initial-major-mode")); |
1838 | else | |
1839 | { | |
4b4deea2 | 1840 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1841 | if (NILP (function) |
4b4deea2 TT |
1842 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1843 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1844 | } |
177c0ea7 | 1845 | |
48265e61 DL |
1846 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1847 | return Qnil; | |
1848 | ||
aed13378 | 1849 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1850 | |
48265e61 DL |
1851 | /* To select a nonfundamental mode, |
1852 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1853 | |
1854 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1855 | ||
a2428fa2 | 1856 | Fset_buffer (buffer); |
48265e61 | 1857 | call0 (function); |
a9ee7a59 KH |
1858 | |
1859 | return unbind_to (count, Qnil); | |
1860 | } | |
1861 | ||
a7ca3326 | 1862 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1863 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1864 | (void) |
1ab256cb RM |
1865 | { |
1866 | register Lisp_Object buf; | |
67180c6a | 1867 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1868 | return buf; |
1869 | } | |
1870 | \f | |
7ec44ec6 GM |
1871 | /* Set the current buffer to B. |
1872 | ||
1873 | We previously set windows_or_buffers_changed here to invalidate | |
1874 | global unchanged information in beg_unchanged and end_unchanged. | |
1875 | This is no longer necessary because we now compute unchanged | |
1876 | information on a buffer-basis. Every action affecting other | |
1877 | windows than the selected one requires a select_window at some | |
1878 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1879 | |
1880 | void | |
d3da34e0 | 1881 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1882 | { |
b5a225b4 | 1883 | if (current_buffer != b) |
7ec44ec6 | 1884 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1885 | } |
1886 | ||
1887 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1888 | This is used by redisplay. */ | |
1889 | ||
1890 | void | |
d3da34e0 | 1891 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1892 | { |
1893 | register struct buffer *old_buf; | |
ce5b453a | 1894 | register Lisp_Object tail; |
c7aa5005 | 1895 | |
b86af064 | 1896 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1897 | if (b->text->beg == NULL) |
b86af064 GM |
1898 | enlarge_buffer_text (b, 0); |
1899 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1900 | |
c7aa5005 KH |
1901 | if (current_buffer == b) |
1902 | return; | |
1903 | ||
1ab256cb RM |
1904 | old_buf = current_buffer; |
1905 | current_buffer = b; | |
1906 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1907 | ||
336cd056 RS |
1908 | if (old_buf) |
1909 | { | |
1910 | /* Put the undo list back in the base buffer, so that it appears | |
1911 | that an indirect buffer shares the undo list of its base. */ | |
1912 | if (old_buf->base_buffer) | |
4b4deea2 | 1913 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1914 | |
1915 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1916 | when it is not current, update them now. */ | |
cffc6f3b | 1917 | record_buffer_markers (old_buf); |
336cd056 RS |
1918 | } |
1919 | ||
1920 | /* Get the undo list from the base buffer, so that it appears | |
1921 | that an indirect buffer shares the undo list of its base. */ | |
1922 | if (b->base_buffer) | |
4b4deea2 | 1923 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1924 | |
1925 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1926 | when it is not current, fetch them now. */ | |
cffc6f3b | 1927 | fetch_buffer_markers (b); |
336cd056 | 1928 | |
1ab256cb RM |
1929 | /* Look down buffer's list of local Lisp variables |
1930 | to find and update any that forward into C variables. */ | |
1931 | ||
ce5b453a | 1932 | do |
1ab256cb | 1933 | { |
4b4deea2 | 1934 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1935 | { |
1936 | Lisp_Object var = XCAR (XCAR (tail)); | |
1937 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1938 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1939 | && SYMBOL_BLV (sym)->fwd) | |
1940 | /* Just reference the variable | |
1941 | to cause it to become set for this buffer. */ | |
1942 | Fsymbol_value (var); | |
1943 | } | |
1ab256cb | 1944 | } |
1ab256cb | 1945 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1946 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1947 | } |
1948 | ||
336cd056 | 1949 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1950 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1951 | |
1952 | void | |
d3da34e0 | 1953 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1954 | { |
1955 | register struct buffer *old_buf; | |
1956 | ||
1957 | if (current_buffer == b) | |
1958 | return; | |
1959 | ||
1960 | old_buf = current_buffer; | |
1961 | current_buffer = b; | |
1962 | ||
cffc6f3b CY |
1963 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1964 | when it is not current, update them now. */ | |
1965 | record_buffer_markers (old_buf); | |
336cd056 RS |
1966 | |
1967 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1968 | when it is not current, fetch them now. */ | |
cffc6f3b | 1969 | fetch_buffer_markers (b); |
336cd056 RS |
1970 | } |
1971 | ||
a7ca3326 | 1972 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1973 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1974 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1975 | also `save-excursion' when you want to make a buffer current | |
1976 | temporarily. This function does not display the buffer, so its effect | |
1977 | ends when the current command terminates. Use `switch-to-buffer' or | |
1978 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1979 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1980 | { |
c8804c4f MR |
1981 | register Lisp_Object buffer; |
1982 | buffer = Fget_buffer (buffer_or_name); | |
1983 | if (NILP (buffer)) | |
1984 | nsberror (buffer_or_name); | |
4b4deea2 | 1985 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1986 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1987 | set_buffer_internal (XBUFFER (buffer)); |
1988 | return buffer; | |
1ab256cb | 1989 | } |
d0628b06 RS |
1990 | |
1991 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1992 | ||
1993 | Lisp_Object | |
d3da34e0 | 1994 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1995 | { |
4b4deea2 | 1996 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1997 | Fset_buffer (buffer); |
1998 | return Qnil; | |
1999 | } | |
1ab256cb | 2000 | \f |
a7ca3326 | 2001 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 2002 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 2003 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 2004 | (void) |
1ab256cb | 2005 | { |
4b4deea2 | 2006 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 2007 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 2008 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2009 | return Qnil; |
2010 | } | |
1ab256cb | 2011 | \f |
a7ca3326 | 2012 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2013 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2014 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2015 | so the buffer is truly empty after this. */) |
5842a27b | 2016 | (void) |
1ab256cb RM |
2017 | { |
2018 | Fwiden (); | |
c0d9a0c3 GM |
2019 | |
2020 | del_range (BEG, Z); | |
c280bc6a | 2021 | |
1ab256cb RM |
2022 | current_buffer->last_window_start = 1; |
2023 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2024 | if future size is less than past size. Use of erase-buffer | |
2025 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2026 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2027 | return Qnil; |
2028 | } | |
2029 | ||
01136e9b | 2030 | void |
d3da34e0 | 2031 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2032 | { |
b7826503 PJ |
2033 | CHECK_NUMBER_COERCE_MARKER (*b); |
2034 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2035 | |
2036 | if (XINT (*b) > XINT (*e)) | |
2037 | { | |
03192067 KH |
2038 | Lisp_Object tem; |
2039 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2040 | } |
2041 | ||
d311d28c | 2042 | if (! (BEGV <= XINT (*b) && XINT (*e) <= ZV)) |
1ab256cb RM |
2043 | args_out_of_range (*b, *e); |
2044 | } | |
2045 | \f | |
b05525fa RS |
2046 | /* Advance BYTE_POS up to a character boundary |
2047 | and return the adjusted position. */ | |
2048 | ||
d311d28c PE |
2049 | static ptrdiff_t |
2050 | advance_to_char_boundary (ptrdiff_t byte_pos) | |
b05525fa | 2051 | { |
f8449323 | 2052 | int c; |
b05525fa | 2053 | |
f8449323 RS |
2054 | if (byte_pos == BEG) |
2055 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2056 | return BEG; |
f8449323 RS |
2057 | |
2058 | c = FETCH_BYTE (byte_pos); | |
2059 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2060 | { |
1be6387d | 2061 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2062 | multibyte sequence. */ |
d311d28c | 2063 | ptrdiff_t orig_byte_pos = byte_pos; |
a9bcded1 KH |
2064 | |
2065 | do | |
2066 | { | |
2067 | byte_pos--; | |
2068 | c = FETCH_BYTE (byte_pos); | |
2069 | } | |
2070 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2071 | INC_POS (byte_pos); |
a9bcded1 KH |
2072 | if (byte_pos < orig_byte_pos) |
2073 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2074 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2075 | surely advance to the correct character boundary. If C is | |
2076 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2077 | } |
2078 | ||
20773569 | 2079 | return byte_pos; |
b05525fa RS |
2080 | } |
2081 | ||
13cda5f9 SM |
2082 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2083 | 1, 1, 0, | |
2084 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2085 | (Lisp_Object buffer) |
13cda5f9 SM |
2086 | { |
2087 | struct buffer *other_buffer; | |
2088 | CHECK_BUFFER (buffer); | |
2089 | other_buffer = XBUFFER (buffer); | |
2090 | ||
4b4deea2 | 2091 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2092 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2093 | |
13cda5f9 SM |
2094 | /* Actually, it probably works just fine. |
2095 | * if (other_buffer == current_buffer) | |
2096 | * error ("Cannot swap a buffer's text with itself"); */ | |
2097 | ||
2098 | /* Actually, this may be workable as well, tho probably only if they're | |
2099 | *both* indirect. */ | |
2100 | if (other_buffer->base_buffer | |
2101 | || current_buffer->base_buffer) | |
2102 | error ("Cannot swap indirect buffers's text"); | |
2103 | ||
2104 | { /* This is probably harder to make work. */ | |
2105 | struct buffer *other; | |
52b852c7 | 2106 | FOR_EACH_BUFFER (other) |
13cda5f9 SM |
2107 | if (other->base_buffer == other_buffer |
2108 | || other->base_buffer == current_buffer) | |
2109 | error ("One of the buffers to swap has indirect buffers"); | |
2110 | } | |
2111 | ||
2112 | #define swapfield(field, type) \ | |
2113 | do { \ | |
2114 | type tmp##field = other_buffer->field; \ | |
2115 | other_buffer->field = current_buffer->field; \ | |
2116 | current_buffer->field = tmp##field; \ | |
2117 | } while (0) | |
5d8ea120 TT |
2118 | #define swapfield_(field, type) \ |
2119 | do { \ | |
4b4deea2 TT |
2120 | type tmp##field = BVAR (other_buffer, field); \ |
2121 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2122 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2123 | } while (0) |
13cda5f9 SM |
2124 | |
2125 | swapfield (own_text, struct buffer_text); | |
2126 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2127 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2128 | #ifdef REL_ALLOC |
261cb4bb PE |
2129 | r_alloc_reset_variable ((void **) ¤t_buffer->own_text.beg, |
2130 | (void **) &other_buffer->own_text.beg); | |
2131 | r_alloc_reset_variable ((void **) &other_buffer->own_text.beg, | |
2132 | (void **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2133 | #endif /* REL_ALLOC */ |
2134 | ||
d311d28c PE |
2135 | swapfield (pt, ptrdiff_t); |
2136 | swapfield (pt_byte, ptrdiff_t); | |
2137 | swapfield (begv, ptrdiff_t); | |
2138 | swapfield (begv_byte, ptrdiff_t); | |
2139 | swapfield (zv, ptrdiff_t); | |
2140 | swapfield (zv_byte, ptrdiff_t); | |
13cda5f9 SM |
2141 | eassert (!current_buffer->base_buffer); |
2142 | eassert (!other_buffer->base_buffer); | |
372f8ffc | 2143 | swapfield (indirections, ptrdiff_t); |
13cda5f9 SM |
2144 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; |
2145 | swapfield (newline_cache, struct region_cache *); | |
2146 | swapfield (width_run_cache, struct region_cache *); | |
2147 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2148 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2149 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2150 | swapfield (overlays_after, struct Lisp_Overlay *); | |
d311d28c | 2151 | swapfield (overlay_center, ptrdiff_t); |
5d8ea120 TT |
2152 | swapfield_ (undo_list, Lisp_Object); |
2153 | swapfield_ (mark, Lisp_Object); | |
2154 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2155 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2156 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2157 | /* FIXME: Not sure what we should do with these *_marker fields. |
2158 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2159 | swapfield_ (pt_marker, Lisp_Object); |
2160 | swapfield_ (begv_marker, Lisp_Object); | |
2161 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2162 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2163 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2164 | |
2165 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2166 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2167 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2168 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2169 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2170 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2171 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2172 | { |
2173 | struct Lisp_Marker *m; | |
2174 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2175 | if (m->buffer == other_buffer) | |
2176 | m->buffer = current_buffer; | |
b8ff72fa SM |
2177 | else |
2178 | /* Since there's no indirect buffer in sight, markers on | |
2179 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2180 | eassert (!m->buffer); | |
13cda5f9 SM |
2181 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2182 | if (m->buffer == current_buffer) | |
2183 | m->buffer = other_buffer; | |
b8ff72fa SM |
2184 | else |
2185 | /* Since there's no indirect buffer in sight, markers on | |
2186 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2187 | eassert (!m->buffer); | |
13cda5f9 | 2188 | } |
126f1fc1 SM |
2189 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2190 | So since we just swapped the markers between the two buffers, we need | |
2191 | to undo the effect of this swap for window markers. */ | |
2192 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2193 | Lisp_Object buf1, buf2; | |
2194 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2195 | ||
2196 | while (NILP (Fmemq (w, ws))) | |
2197 | { | |
2198 | ws = Fcons (w, ws); | |
d3d50620 DA |
2199 | if (MARKERP (XWINDOW (w)->pointm) |
2200 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2201 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2202 | Fset_marker (XWINDOW (w)->pointm, | |
3a45383a | 2203 | make_number |
d3d50620 DA |
2204 | (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), |
2205 | XWINDOW (w)->buffer); | |
126f1fc1 SM |
2206 | w = Fnext_window (w, Qt, Qt); |
2207 | } | |
2208 | } | |
2209 | ||
13cda5f9 SM |
2210 | if (current_buffer->text->intervals) |
2211 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2212 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2213 | if (other_buffer->text->intervals) | |
2214 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2215 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2216 | ||
2217 | return Qnil; | |
2218 | } | |
2219 | ||
a7ca3326 | 2220 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2221 | 1, 1, 0, |
7ee72033 | 2222 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2223 | If FLAG is t, this makes the buffer a multibyte buffer. |
2224 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2225 | In these cases, the buffer contents remain unchanged as a sequence of |
2226 | bytes but the contents viewed as characters do change. | |
2227 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2228 | all eight-bit bytes to eight-bit characters. |
2229 | If the multibyte flag was really changed, undo information of the | |
2230 | current buffer is cleared. */) | |
5842a27b | 2231 | (Lisp_Object flag) |
3ac81adb | 2232 | { |
65745fad | 2233 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2234 | struct buffer *other; |
d311d28c | 2235 | ptrdiff_t begv, zv; |
8d1203ea | 2236 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2237 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2238 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2239 | struct gcpro gcpro1; |
3ac81adb | 2240 | |
6e553d5e RS |
2241 | if (current_buffer->base_buffer) |
2242 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2243 | ||
70e77119 | 2244 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2245 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2246 | return flag; |
2247 | ||
38babc07 KS |
2248 | GCPRO1 (old_undo); |
2249 | ||
2250 | /* Don't record these buffer changes. We will put a special undo entry | |
2251 | instead. */ | |
4b4deea2 | 2252 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2253 | |
3ac81adb RS |
2254 | /* If the cached position is for this buffer, clear it out. */ |
2255 | clear_charpos_cache (current_buffer); | |
2256 | ||
458c8af4 KH |
2257 | if (NILP (flag)) |
2258 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2259 | else | |
2260 | begv = BEGV, zv = ZV; | |
2261 | ||
a9bcded1 KH |
2262 | if (narrowed) |
2263 | Fwiden (); | |
2264 | ||
3ac81adb RS |
2265 | if (NILP (flag)) |
2266 | { | |
d311d28c | 2267 | ptrdiff_t pos, stop; |
a9bcded1 KH |
2268 | unsigned char *p; |
2269 | ||
3ac81adb RS |
2270 | /* Do this first, so it can use CHAR_TO_BYTE |
2271 | to calculate the old correspondences. */ | |
2272 | set_intervals_multibyte (0); | |
2273 | ||
4b4deea2 | 2274 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2275 | |
2276 | Z = Z_BYTE; | |
2277 | BEGV = BEGV_BYTE; | |
2278 | ZV = ZV_BYTE; | |
2279 | GPT = GPT_BYTE; | |
2280 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2281 | ||
60ebfdf3 | 2282 | |
65745fad SM |
2283 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2284 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2285 | |
2286 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2287 | pos = BEG; | |
2288 | stop = GPT; | |
2289 | p = BEG_ADDR; | |
2290 | while (1) | |
2291 | { | |
2292 | int c, bytes; | |
2293 | ||
2294 | if (pos == stop) | |
2295 | { | |
2296 | if (pos == Z) | |
2297 | break; | |
2298 | p = GAP_END_ADDR; | |
2299 | stop = Z; | |
2300 | } | |
8f348ed5 KH |
2301 | if (ASCII_BYTE_P (*p)) |
2302 | p++, pos++; | |
2303 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2304 | { |
62a6e103 | 2305 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2306 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2307 | last one, and change the last one to the character |
a9bcded1 KH |
2308 | code. */ |
2309 | bytes--; | |
2310 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2311 | p = GAP_END_ADDR; | |
2312 | *p++ = c; | |
2313 | pos++; | |
2314 | if (begv > pos) | |
2315 | begv -= bytes; | |
2316 | if (zv > pos) | |
2317 | zv -= bytes; | |
2318 | stop = Z; | |
2319 | } | |
8f924df7 | 2320 | else |
8f348ed5 KH |
2321 | { |
2322 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2323 | p += bytes, pos += bytes; | |
2324 | } | |
a9bcded1 KH |
2325 | } |
2326 | if (narrowed) | |
2327 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2328 | } |
2329 | else | |
2330 | { | |
d311d28c PE |
2331 | ptrdiff_t pt = PT; |
2332 | ptrdiff_t pos, stop; | |
8f348ed5 | 2333 | unsigned char *p, *pend; |
a9bcded1 | 2334 | |
673c57d2 | 2335 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2336 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2337 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2338 | |
8f924df7 | 2339 | if (EQ (flag, Qt) |
a3a303df | 2340 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2341 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2342 | { | |
8f54f30a | 2343 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2344 | |
8f54f30a PE |
2345 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2346 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2347 | { |
d311d28c | 2348 | ptrdiff_t new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2349 | |
2350 | move_gap_both (new_gpt, new_gpt); | |
2351 | } | |
2352 | } | |
2353 | ||
a9bcded1 KH |
2354 | /* Make the buffer contents valid as multibyte by converting |
2355 | 8-bit characters to multibyte form. */ | |
2356 | pos = BEG; | |
2357 | stop = GPT; | |
2358 | p = BEG_ADDR; | |
8f348ed5 | 2359 | pend = GPT_ADDR; |
a9bcded1 KH |
2360 | while (1) |
2361 | { | |
2362 | int bytes; | |
2363 | ||
2364 | if (pos == stop) | |
2365 | { | |
2366 | if (pos == Z) | |
2367 | break; | |
2368 | p = GAP_END_ADDR; | |
8f348ed5 | 2369 | pend = Z_ADDR; |
a9bcded1 KH |
2370 | stop = Z; |
2371 | } | |
177c0ea7 | 2372 | |
a3a303df KH |
2373 | if (ASCII_BYTE_P (*p)) |
2374 | p++, pos++; | |
dcfb9bc4 KH |
2375 | else if (EQ (flag, Qt) |
2376 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2377 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2378 | p += bytes, pos += bytes; |
2379 | else | |
2380 | { | |
2381 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2382 | int c; |
a9bcded1 | 2383 | |
8f924df7 | 2384 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2385 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2386 | *p = tmp[0]; |
2387 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2388 | bytes--; | |
b68864e5 | 2389 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2390 | /* Now the gap is after the just inserted data. */ |
2391 | pos = GPT; | |
2392 | p = GAP_END_ADDR; | |
2393 | if (pos <= begv) | |
2394 | begv += bytes; | |
2395 | if (pos <= zv) | |
2396 | zv += bytes; | |
2397 | if (pos <= pt) | |
2398 | pt += bytes; | |
31285a8f | 2399 | pend = Z_ADDR; |
a9bcded1 KH |
2400 | stop = Z; |
2401 | } | |
2402 | } | |
2403 | ||
2404 | if (pt != PT) | |
2405 | TEMP_SET_PT (pt); | |
2406 | ||
2407 | if (narrowed) | |
2408 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2409 | ||
3ac81adb RS |
2410 | /* Do this first, so that chars_in_text asks the right question. |
2411 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2412 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2413 | |
b05525fa | 2414 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2415 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2416 | |
673c57d2 | 2417 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2418 | |
2419 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2420 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2421 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2422 | else |
2423 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2424 | |
2425 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2426 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2427 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2428 | else |
2429 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2430 | |
2431 | { | |
d311d28c PE |
2432 | ptrdiff_t byte = advance_to_char_boundary (PT_BYTE); |
2433 | ptrdiff_t position; | |
b05525fa | 2434 | |
8f54f30a PE |
2435 | if (byte > GPT_BYTE) |
2436 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2437 | else |
8f54f30a PE |
2438 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2439 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2440 | } |
3ac81adb RS |
2441 | |
2442 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2443 | |
2444 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2445 | getting confused by the markers that have not yet been updated. | |
2446 | It is also a signal that it should never create a marker. */ | |
65745fad | 2447 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2448 | |
65745fad | 2449 | for (; tail; tail = tail->next) |
3ac81adb | 2450 | { |
65745fad SM |
2451 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2452 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2453 | } |
b69f9797 RS |
2454 | |
2455 | /* Make sure no markers were put on the chain | |
2456 | while the chain value was incorrect. */ | |
65745fad | 2457 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2458 | abort (); |
2459 | ||
3ac81adb RS |
2460 | BUF_MARKERS (current_buffer) = markers; |
2461 | ||
2462 | /* Do this last, so it can calculate the new correspondences | |
2463 | between chars and bytes. */ | |
2464 | set_intervals_multibyte (1); | |
2465 | } | |
2466 | ||
38babc07 KS |
2467 | if (!EQ (old_undo, Qt)) |
2468 | { | |
2469 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2470 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2471 | intern ("set-buffer-multibyte"), |
2472 | NILP (flag) ? Qt : Qnil), | |
2473 | old_undo); | |
38babc07 KS |
2474 | } |
2475 | ||
2476 | UNGCPRO; | |
a9bcded1 | 2477 | |
724b203f GM |
2478 | /* Changing the multibyteness of a buffer means that all windows |
2479 | showing that buffer must be updated thoroughly. */ | |
2480 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2481 | ++windows_or_buffers_changed; | |
2482 | ||
abc9d959 RS |
2483 | /* Copy this buffer's new multibyte status |
2484 | into all of its indirect buffers. */ | |
52b852c7 | 2485 | FOR_EACH_BUFFER (other) |
4b4deea2 | 2486 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2487 | { |
4b4deea2 TT |
2488 | BVAR (other, enable_multibyte_characters) |
2489 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2490 | other->prevent_redisplay_optimizations_p = 1; |
2491 | } | |
abc9d959 | 2492 | |
ed00559d KH |
2493 | /* Restore the modifiedness of the buffer. */ |
2494 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2495 | Fset_buffer_modified_p (Qnil); | |
2496 | ||
172f9454 KH |
2497 | /* Update coding systems of this buffer's process (if any). */ |
2498 | { | |
2499 | Lisp_Object process; | |
2500 | ||
2501 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2502 | if (PROCESSP (process)) | |
2503 | setup_process_coding_systems (process); | |
2504 | } | |
2505 | ||
3ac81adb RS |
2506 | return flag; |
2507 | } | |
2508 | \f | |
a7ca3326 | 2509 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2510 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2511 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2512 | Most local variable bindings are eliminated so that the default values |
2513 | become effective once more. Also, the syntax table is set from | |
2514 | `standard-syntax-table', the local keymap is set to nil, | |
2515 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2516 | This function also forces redisplay of the mode line. | |
2517 | ||
2518 | Every function to select a new major mode starts by | |
2519 | calling this function. | |
2520 | ||
2521 | As a special exception, local variables whose names have | |
2522 | a non-nil `permanent-local' property are not eliminated by this function. | |
2523 | ||
2524 | The first thing this function does is run | |
7ee72033 | 2525 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2526 | (void) |
1ab256cb | 2527 | { |
dee091a3 | 2528 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2529 | |
3709505e | 2530 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2531 | remain swapped in, in their symbols. */ |
1ab256cb | 2532 | |
2f3f993b | 2533 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2534 | |
2535 | /* Actually eliminate all local bindings of this buffer. */ | |
2536 | ||
13de9290 | 2537 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2538 | |
1ab256cb RM |
2539 | /* Force mode-line redisplay. Useful here because all major mode |
2540 | commands call this function. */ | |
2541 | update_mode_lines++; | |
2542 | ||
2543 | return Qnil; | |
2544 | } | |
2f3f993b RS |
2545 | |
2546 | /* Make sure no local variables remain set up with buffer B | |
2547 | for their current values. */ | |
2548 | ||
2549 | static void | |
d3da34e0 | 2550 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2551 | { |
ce5b453a | 2552 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2553 | |
2554 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2555 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2556 | |
67ee9f6e | 2557 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2558 | { |
ce5b453a SM |
2559 | Lisp_Object sym = XCAR (XCAR (alist)); |
2560 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2561 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2562 | now cached. */ |
ce5b453a | 2563 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2564 | { |
e7c10f83 SM |
2565 | /* Symbol is set up for this buffer's old local value: |
2566 | swap it out! */ | |
ce5b453a | 2567 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2568 | } |
2569 | } | |
2570 | } | |
1ab256cb | 2571 | \f |
2eec3b4e | 2572 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2573 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2574 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2575 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2576 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2577 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2578 | or where an overlay starts which ends at or after POS; |
624d2678 | 2579 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2580 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2581 | |
2582 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2583 | when this function is called. |
2584 | ||
2585 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2586 | If EXTEND is zero, we never extend the vector, | |
2587 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2588 | But we still return the total number of overlays. |
2589 | ||
2590 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2591 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2592 | default (BEGV or ZV). */ | |
2eec3b4e | 2593 | |
b081724f PE |
2594 | ptrdiff_t |
2595 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2596 | ptrdiff_t *len_ptr, | |
d311d28c | 2597 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr, int change_req) |
1ab256cb | 2598 | { |
2410d73a SM |
2599 | Lisp_Object overlay, start, end; |
2600 | struct Lisp_Overlay *tail; | |
b081724f PE |
2601 | ptrdiff_t idx = 0; |
2602 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2603 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2604 | ptrdiff_t next = ZV; |
2605 | ptrdiff_t prev = BEGV; | |
61d54cd5 RS |
2606 | int inhibit_storing = 0; |
2607 | ||
4cb3e6b3 | 2608 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
2eec3b4e | 2609 | { |
d311d28c | 2610 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2611 | |
2410d73a | 2612 | XSETMISC (overlay, tail); |
1ab256cb | 2613 | |
2eec3b4e RS |
2614 | start = OVERLAY_START (overlay); |
2615 | end = OVERLAY_END (overlay); | |
239c932b RS |
2616 | endpos = OVERLAY_POSITION (end); |
2617 | if (endpos < pos) | |
2618 | { | |
2619 | if (prev < endpos) | |
2620 | prev = endpos; | |
2621 | break; | |
2622 | } | |
413e06a4 RS |
2623 | startpos = OVERLAY_POSITION (start); |
2624 | /* This one ends at or after POS | |
daa1c109 | 2625 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2626 | if (prev < startpos && startpos < pos) |
2627 | prev = startpos; | |
239c932b RS |
2628 | if (endpos == pos) |
2629 | continue; | |
2eec3b4e RS |
2630 | if (startpos <= pos) |
2631 | { | |
2632 | if (idx == len) | |
2633 | { | |
61d54cd5 RS |
2634 | /* The supplied vector is full. |
2635 | Either make it bigger, or don't store any more in it. */ | |
2636 | if (extend) | |
2637 | { | |
0065d054 PE |
2638 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2639 | sizeof *vec); | |
61d54cd5 | 2640 | *vec_ptr = vec; |
0065d054 | 2641 | len = *len_ptr; |
61d54cd5 RS |
2642 | } |
2643 | else | |
2644 | inhibit_storing = 1; | |
2eec3b4e | 2645 | } |
61d54cd5 RS |
2646 | |
2647 | if (!inhibit_storing) | |
2648 | vec[idx] = overlay; | |
2649 | /* Keep counting overlays even if we can't return them all. */ | |
2650 | idx++; | |
2eec3b4e RS |
2651 | } |
2652 | else if (startpos < next) | |
2653 | next = startpos; | |
2654 | } | |
2655 | ||
4cb3e6b3 | 2656 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
1ab256cb | 2657 | { |
d311d28c | 2658 | ptrdiff_t startpos, endpos; |
52f8ec73 | 2659 | |
2410d73a | 2660 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2661 | |
2662 | start = OVERLAY_START (overlay); | |
2663 | end = OVERLAY_END (overlay); | |
2664 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2665 | if (pos < startpos) |
2eec3b4e RS |
2666 | { |
2667 | if (startpos < next) | |
2668 | next = startpos; | |
2669 | break; | |
2670 | } | |
239c932b RS |
2671 | endpos = OVERLAY_POSITION (end); |
2672 | if (pos < endpos) | |
2eec3b4e RS |
2673 | { |
2674 | if (idx == len) | |
2675 | { | |
61d54cd5 RS |
2676 | if (extend) |
2677 | { | |
0065d054 PE |
2678 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2679 | sizeof *vec); | |
61d54cd5 | 2680 | *vec_ptr = vec; |
0065d054 | 2681 | len = *len_ptr; |
61d54cd5 RS |
2682 | } |
2683 | else | |
2684 | inhibit_storing = 1; | |
2eec3b4e | 2685 | } |
61d54cd5 RS |
2686 | |
2687 | if (!inhibit_storing) | |
2688 | vec[idx] = overlay; | |
2689 | idx++; | |
413e06a4 RS |
2690 | |
2691 | if (startpos < pos && startpos > prev) | |
2692 | prev = startpos; | |
2eec3b4e | 2693 | } |
239c932b RS |
2694 | else if (endpos < pos && endpos > prev) |
2695 | prev = endpos; | |
1d5f4c1d MB |
2696 | else if (endpos == pos && startpos > prev |
2697 | && (!change_req || startpos < pos)) | |
413e06a4 | 2698 | prev = startpos; |
1ab256cb RM |
2699 | } |
2700 | ||
239c932b RS |
2701 | if (next_ptr) |
2702 | *next_ptr = next; | |
2703 | if (prev_ptr) | |
2704 | *prev_ptr = prev; | |
2eec3b4e RS |
2705 | return idx; |
2706 | } | |
74514898 | 2707 | \f |
7723e095 MR |
2708 | /* Find all the overlays in the current buffer that overlap the range |
2709 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2710 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2711 | |
177c0ea7 | 2712 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2713 | Store in *LEN_PTR the size allocated for the vector. |
2714 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2715 | or ZV if there are no more overlays. | |
2716 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2717 | or BEGV if there are no previous overlays. | |
2718 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2719 | ||
2720 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2721 | when this function is called. | |
2722 | ||
2723 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2724 | If EXTEND is zero, we never extend the vector, | |
2725 | and we store only as many overlays as will fit. | |
2726 | But we still return the total number of overlays. */ | |
2727 | ||
21514da7 | 2728 | static ptrdiff_t |
145582a0 | 2729 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2730 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
d311d28c | 2731 | ptrdiff_t *next_ptr, ptrdiff_t *prev_ptr) |
74514898 | 2732 | { |
2410d73a SM |
2733 | Lisp_Object overlay, ostart, oend; |
2734 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2735 | ptrdiff_t idx = 0; |
2736 | ptrdiff_t len = *len_ptr; | |
74514898 | 2737 | Lisp_Object *vec = *vec_ptr; |
d311d28c PE |
2738 | ptrdiff_t next = ZV; |
2739 | ptrdiff_t prev = BEGV; | |
74514898 | 2740 | int inhibit_storing = 0; |
7723e095 | 2741 | int end_is_Z = end == Z; |
74514898 | 2742 | |
4cb3e6b3 | 2743 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
74514898 | 2744 | { |
d311d28c | 2745 | ptrdiff_t startpos, endpos; |
74514898 | 2746 | |
2410d73a | 2747 | XSETMISC (overlay, tail); |
74514898 RS |
2748 | |
2749 | ostart = OVERLAY_START (overlay); | |
2750 | oend = OVERLAY_END (overlay); | |
2751 | endpos = OVERLAY_POSITION (oend); | |
2752 | if (endpos < beg) | |
2753 | { | |
2754 | if (prev < endpos) | |
2755 | prev = endpos; | |
2756 | break; | |
2757 | } | |
2758 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2759 | /* Count an interval if it overlaps the range, is empty at the |
2760 | start of the range, or is empty at END provided END denotes the | |
2761 | end of the buffer. */ | |
74514898 | 2762 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2763 | || (startpos == endpos |
2764 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2765 | { |
2766 | if (idx == len) | |
2767 | { | |
2768 | /* The supplied vector is full. | |
2769 | Either make it bigger, or don't store any more in it. */ | |
2770 | if (extend) | |
2771 | { | |
0065d054 PE |
2772 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2773 | sizeof *vec); | |
74514898 | 2774 | *vec_ptr = vec; |
0065d054 | 2775 | len = *len_ptr; |
74514898 RS |
2776 | } |
2777 | else | |
2778 | inhibit_storing = 1; | |
2779 | } | |
2780 | ||
2781 | if (!inhibit_storing) | |
2782 | vec[idx] = overlay; | |
2783 | /* Keep counting overlays even if we can't return them all. */ | |
2784 | idx++; | |
2785 | } | |
2786 | else if (startpos < next) | |
2787 | next = startpos; | |
2788 | } | |
2789 | ||
4cb3e6b3 | 2790 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
74514898 | 2791 | { |
d311d28c | 2792 | ptrdiff_t startpos, endpos; |
74514898 | 2793 | |
2410d73a | 2794 | XSETMISC (overlay, tail); |
74514898 RS |
2795 | |
2796 | ostart = OVERLAY_START (overlay); | |
2797 | oend = OVERLAY_END (overlay); | |
2798 | startpos = OVERLAY_POSITION (ostart); | |
2799 | if (end < startpos) | |
2800 | { | |
2801 | if (startpos < next) | |
2802 | next = startpos; | |
2803 | break; | |
2804 | } | |
2805 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2806 | /* Count an interval if it overlaps the range, is empty at the |
2807 | start of the range, or is empty at END provided END denotes the | |
2808 | end of the buffer. */ | |
74514898 | 2809 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2810 | || (startpos == endpos |
2811 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2812 | { |
2813 | if (idx == len) | |
2814 | { | |
2815 | if (extend) | |
2816 | { | |
0065d054 PE |
2817 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2818 | sizeof *vec); | |
74514898 | 2819 | *vec_ptr = vec; |
0065d054 | 2820 | len = *len_ptr; |
74514898 RS |
2821 | } |
2822 | else | |
2823 | inhibit_storing = 1; | |
2824 | } | |
2825 | ||
2826 | if (!inhibit_storing) | |
2827 | vec[idx] = overlay; | |
2828 | idx++; | |
2829 | } | |
2830 | else if (endpos < beg && endpos > prev) | |
2831 | prev = endpos; | |
2832 | } | |
fc04fa47 | 2833 | |
74514898 RS |
2834 | if (next_ptr) |
2835 | *next_ptr = next; | |
2836 | if (prev_ptr) | |
2837 | *prev_ptr = prev; | |
2838 | return idx; | |
2839 | } | |
09a22085 GM |
2840 | |
2841 | ||
2842 | /* Return non-zero if there exists an overlay with a non-nil | |
2843 | `mouse-face' property overlapping OVERLAY. */ | |
2844 | ||
2845 | int | |
d3da34e0 | 2846 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2847 | { |
d311d28c PE |
2848 | ptrdiff_t start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2849 | ptrdiff_t end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2850 | ptrdiff_t n, i, size; |
09a22085 | 2851 | Lisp_Object *v, tem; |
177c0ea7 | 2852 | |
bfd8410f | 2853 | size = 10; |
38182d90 | 2854 | v = alloca (size * sizeof *v); |
bfd8410f GM |
2855 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); |
2856 | if (n > size) | |
09a22085 | 2857 | { |
38182d90 | 2858 | v = alloca (n * sizeof *v); |
09a22085 GM |
2859 | overlays_in (start, end, 0, &v, &n, NULL, NULL); |
2860 | } | |
2861 | ||
2862 | for (i = 0; i < n; ++i) | |
2863 | if (!EQ (v[i], overlay) | |
2864 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2865 | !NILP (tem))) | |
2866 | break; | |
2867 | ||
2868 | return i < n; | |
2869 | } | |
2870 | ||
2871 | ||
74514898 | 2872 | \f |
fc04fa47 KH |
2873 | /* Fast function to just test if we're at an overlay boundary. */ |
2874 | int | |
d311d28c | 2875 | overlay_touches_p (ptrdiff_t pos) |
fc04fa47 | 2876 | { |
2410d73a SM |
2877 | Lisp_Object overlay; |
2878 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2879 | |
4cb3e6b3 | 2880 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
fc04fa47 | 2881 | { |
d311d28c | 2882 | ptrdiff_t endpos; |
fc04fa47 | 2883 | |
2410d73a | 2884 | XSETMISC (overlay ,tail); |
22657b40 | 2885 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2886 | |
2887 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2888 | if (endpos < pos) | |
2889 | break; | |
2890 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2891 | return 1; | |
2892 | } | |
2893 | ||
4cb3e6b3 | 2894 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
fc04fa47 | 2895 | { |
d311d28c | 2896 | ptrdiff_t startpos; |
fc04fa47 | 2897 | |
2410d73a | 2898 | XSETMISC (overlay, tail); |
22657b40 | 2899 | eassert (OVERLAYP (overlay)); |
fc04fa47 KH |
2900 | |
2901 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2902 | if (pos < startpos) | |
2903 | break; | |
2904 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2905 | return 1; | |
2906 | } | |
2907 | return 0; | |
2908 | } | |
2eec3b4e | 2909 | \f |
5985d248 KH |
2910 | struct sortvec |
2911 | { | |
2912 | Lisp_Object overlay; | |
d311d28c | 2913 | ptrdiff_t beg, end; |
fadf4e30 | 2914 | EMACS_INT priority; |
5985d248 KH |
2915 | }; |
2916 | ||
2917 | static int | |
d3da34e0 | 2918 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2919 | { |
dfcf069d AS |
2920 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2921 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2922 | if (s1->priority != s2->priority) |
c20998a7 | 2923 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2924 | if (s1->beg != s2->beg) |
c20998a7 | 2925 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2926 | if (s1->end != s2->end) |
c20998a7 | 2927 | return s2->end < s1->end ? -1 : 1; |
cae07000 SM |
2928 | /* Avoid the non-determinism of qsort by choosing an arbitrary ordering |
2929 | between "equal" overlays. The result can still change between | |
2930 | invocations of Emacs, but it won't change in the middle of | |
2931 | `find_field' (bug#6830). */ | |
9af5ed87 PE |
2932 | if (XHASH (s1->overlay) != XHASH (s2->overlay)) |
2933 | return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1; | |
5985d248 KH |
2934 | return 0; |
2935 | } | |
2936 | ||
2937 | /* Sort an array of overlays by priority. The array is modified in place. | |
2938 | The return value is the new size; this may be smaller than the original | |
2939 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2940 | ptrdiff_t |
2941 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2942 | { |
b081724f | 2943 | ptrdiff_t i, j; |
38182d90 | 2944 | struct sortvec *sortvec = alloca (noverlays * sizeof *sortvec); |
5985d248 KH |
2945 | |
2946 | /* Put the valid and relevant overlays into sortvec. */ | |
2947 | ||
2948 | for (i = 0, j = 0; i < noverlays; i++) | |
2949 | { | |
0fa767e7 | 2950 | Lisp_Object tem; |
c99fc30f | 2951 | Lisp_Object overlay; |
5985d248 | 2952 | |
c99fc30f | 2953 | overlay = overlay_vec[i]; |
22657b40 | 2954 | if (OVERLAYP (overlay) |
5985d248 KH |
2955 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
2956 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2957 | { | |
0fa767e7 KH |
2958 | /* If we're interested in a specific window, then ignore |
2959 | overlays that are limited to some other window. */ | |
2960 | if (w) | |
5985d248 | 2961 | { |
28545e04 | 2962 | Lisp_Object window; |
0fa767e7 KH |
2963 | |
2964 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2965 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2966 | continue; |
5985d248 | 2967 | } |
0fa767e7 KH |
2968 | |
2969 | /* This overlay is good and counts: put it into sortvec. */ | |
2970 | sortvec[j].overlay = overlay; | |
2971 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2972 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2973 | tem = Foverlay_get (overlay, Qpriority); | |
2974 | if (INTEGERP (tem)) | |
2975 | sortvec[j].priority = XINT (tem); | |
2976 | else | |
2977 | sortvec[j].priority = 0; | |
2978 | j++; | |
5985d248 KH |
2979 | } |
2980 | } | |
2981 | noverlays = j; | |
2982 | ||
2983 | /* Sort the overlays into the proper order: increasing priority. */ | |
2984 | ||
2985 | if (noverlays > 1) | |
2986 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2987 | ||
2988 | for (i = 0; i < noverlays; i++) | |
2989 | overlay_vec[i] = sortvec[i].overlay; | |
2990 | return (noverlays); | |
2991 | } | |
2992 | \f | |
bbbe9545 KH |
2993 | struct sortstr |
2994 | { | |
cb26008f | 2995 | Lisp_Object string, string2; |
93cb6be3 | 2996 | ptrdiff_t size; |
8961a454 | 2997 | EMACS_INT priority; |
bbbe9545 KH |
2998 | }; |
2999 | ||
e8185fa8 KH |
3000 | struct sortstrlist |
3001 | { | |
3002 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
3003 | ptrdiff_t size; /* Allocated length of that array. */ |
3004 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 3005 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3006 | }; |
3007 | ||
3008 | /* Buffers for storing information about the overlays touching a given | |
3009 | position. These could be automatic variables in overlay_strings, but | |
3010 | it's more efficient to hold onto the memory instead of repeatedly | |
3011 | allocating and freeing it. */ | |
3012 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3013 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3014 | |
3015 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 3016 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 3017 | |
bbbe9545 KH |
3018 | /* A comparison function suitable for passing to qsort. */ |
3019 | static int | |
d3da34e0 | 3020 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3021 | { |
3022 | struct sortstr *s1 = (struct sortstr *)as1; | |
3023 | struct sortstr *s2 = (struct sortstr *)as2; | |
3024 | if (s1->size != s2->size) | |
c20998a7 | 3025 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 3026 | if (s1->priority != s2->priority) |
c20998a7 | 3027 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
3028 | return 0; |
3029 | } | |
3030 | ||
e8185fa8 | 3031 | static void |
93cb6be3 PE |
3032 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
3033 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 3034 | { |
d311d28c | 3035 | ptrdiff_t nbytes; |
43d27a72 | 3036 | |
e8185fa8 | 3037 | if (ssl->used == ssl->size) |
0065d054 | 3038 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 3039 | ssl->buf[ssl->used].string = str; |
cb26008f | 3040 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3041 | ssl->buf[ssl->used].size = size; |
3042 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3043 | ssl->used++; | |
43d27a72 | 3044 | |
4b4deea2 | 3045 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3046 | nbytes = SCHARS (str); |
43d27a72 | 3047 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3048 | nbytes = count_size_as_multibyte (SDATA (str), |
3049 | SBYTES (str)); | |
43d27a72 | 3050 | else |
d5db4077 | 3051 | nbytes = SBYTES (str); |
43d27a72 | 3052 | |
0065d054 PE |
3053 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3054 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3055 | ssl->bytes += nbytes; |
3056 | ||
cb26008f | 3057 | if (STRINGP (str2)) |
43d27a72 | 3058 | { |
4b4deea2 | 3059 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3060 | nbytes = SCHARS (str2); |
43d27a72 | 3061 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3062 | nbytes = count_size_as_multibyte (SDATA (str2), |
3063 | SBYTES (str2)); | |
43d27a72 | 3064 | else |
d5db4077 | 3065 | nbytes = SBYTES (str2); |
43d27a72 | 3066 | |
0065d054 PE |
3067 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3068 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3069 | ssl->bytes += nbytes; |
3070 | } | |
e8185fa8 | 3071 | } |
bbbe9545 KH |
3072 | |
3073 | /* Return the concatenation of the strings associated with overlays that | |
3074 | begin or end at POS, ignoring overlays that are specific to a window | |
3075 | other than W. The strings are concatenated in the appropriate order: | |
3076 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3077 | lower. Normally all of the after-strings come first, but zero-sized |
3078 | overlays have their after-strings ride along with the before-strings | |
3079 | because it would look strange to print them inside-out. | |
3080 | ||
3081 | Returns the string length, and stores the contents indirectly through | |
3082 | PSTR, if that variable is non-null. The string may be overwritten by | |
3083 | subsequent calls. */ | |
6b5d3b89 | 3084 | |
d311d28c PE |
3085 | ptrdiff_t |
3086 | overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr) | |
bbbe9545 | 3087 | { |
28545e04 | 3088 | Lisp_Object overlay, window, str; |
2410d73a | 3089 | struct Lisp_Overlay *ov; |
d311d28c | 3090 | ptrdiff_t startpos, endpos; |
4b4deea2 | 3091 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3092 | |
e8185fa8 KH |
3093 | overlay_heads.used = overlay_heads.bytes = 0; |
3094 | overlay_tails.used = overlay_tails.bytes = 0; | |
4cb3e6b3 | 3095 | for (ov = buffer_get_overlays (NULL, OV_BEFORE); ov; ov = ov->next) |
bbbe9545 | 3096 | { |
2410d73a | 3097 | XSETMISC (overlay, ov); |
c2d5b10f | 3098 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3099 | |
3100 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3101 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3102 | if (endpos < pos) | |
3103 | break; | |
3104 | if (endpos != pos && startpos != pos) | |
3105 | continue; | |
3106 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3107 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3108 | continue; |
e8185fa8 KH |
3109 | if (startpos == pos |
3110 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3111 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3112 | (startpos == endpos |
3113 | ? Foverlay_get (overlay, Qafter_string) | |
3114 | : Qnil), | |
3115 | Foverlay_get (overlay, Qpriority), | |
3116 | endpos - startpos); | |
3117 | else if (endpos == pos | |
3118 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3119 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3120 | Foverlay_get (overlay, Qpriority), |
3121 | endpos - startpos); | |
bbbe9545 | 3122 | } |
4cb3e6b3 | 3123 | for (ov = buffer_get_overlays (NULL, OV_AFTER); ov; ov = ov->next) |
bbbe9545 | 3124 | { |
2410d73a SM |
3125 | XSETMISC (overlay, ov); |
3126 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3127 | |
3128 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3129 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3130 | if (startpos > pos) | |
3131 | break; | |
e8185fa8 KH |
3132 | if (endpos != pos && startpos != pos) |
3133 | continue; | |
3134 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3135 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3136 | continue; |
e8185fa8 KH |
3137 | if (startpos == pos |
3138 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3139 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3140 | (startpos == endpos |
3141 | ? Foverlay_get (overlay, Qafter_string) | |
3142 | : Qnil), | |
3143 | Foverlay_get (overlay, Qpriority), | |
3144 | endpos - startpos); | |
3145 | else if (endpos == pos | |
3146 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3147 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3148 | Foverlay_get (overlay, Qpriority), |
3149 | endpos - startpos); | |
bbbe9545 | 3150 | } |
e8185fa8 KH |
3151 | if (overlay_tails.used > 1) |
3152 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3153 | cmp_for_strings); | |
3154 | if (overlay_heads.used > 1) | |
3155 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3156 | cmp_for_strings); | |
3157 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3158 | { |
e8185fa8 | 3159 | Lisp_Object tem; |
d311d28c | 3160 | ptrdiff_t i; |
9f4d7cde | 3161 | unsigned char *p; |
0065d054 | 3162 | ptrdiff_t total; |
bbbe9545 | 3163 | |
0065d054 PE |
3164 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3165 | memory_full (SIZE_MAX); | |
3166 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3167 | if (total > overlay_str_len) |
0065d054 PE |
3168 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3169 | total - overlay_str_len, -1, 1); | |
3170 | ||
bbbe9545 | 3171 | p = overlay_str_buf; |
e8185fa8 | 3172 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3173 | { |
d311d28c | 3174 | ptrdiff_t nbytes; |
e8185fa8 | 3175 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3176 | nbytes = copy_text (SDATA (tem), p, |
3177 | SBYTES (tem), | |
43d27a72 RS |
3178 | STRING_MULTIBYTE (tem), multibyte); |
3179 | p += nbytes; | |
bbbe9545 | 3180 | } |
e8185fa8 | 3181 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3182 | { |
d311d28c | 3183 | ptrdiff_t nbytes; |
e8185fa8 | 3184 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3185 | nbytes = copy_text (SDATA (tem), p, |
3186 | SBYTES (tem), | |
43d27a72 RS |
3187 | STRING_MULTIBYTE (tem), multibyte); |
3188 | p += nbytes; | |
cb26008f KH |
3189 | tem = overlay_heads.buf[i].string2; |
3190 | if (STRINGP (tem)) | |
3191 | { | |
d5db4077 KR |
3192 | nbytes = copy_text (SDATA (tem), p, |
3193 | SBYTES (tem), | |
43d27a72 RS |
3194 | STRING_MULTIBYTE (tem), multibyte); |
3195 | p += nbytes; | |
cb26008f | 3196 | } |
bbbe9545 | 3197 | } |
cb26008f KH |
3198 | if (p != overlay_str_buf + total) |
3199 | abort (); | |
bbbe9545 KH |
3200 | if (pstr) |
3201 | *pstr = overlay_str_buf; | |
e8185fa8 | 3202 | return total; |
bbbe9545 | 3203 | } |
e8185fa8 | 3204 | return 0; |
bbbe9545 KH |
3205 | } |
3206 | \f | |
5c4f68f1 | 3207 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3208 | |
2eec3b4e | 3209 | void |
d311d28c | 3210 | recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos) |
2eec3b4e | 3211 | { |
2410d73a SM |
3212 | Lisp_Object overlay, beg, end; |
3213 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3214 | |
3215 | /* See if anything in overlays_before should move to overlays_after. */ | |
3216 | ||
3217 | /* We don't strictly need prev in this loop; it should always be nil. | |
3218 | But we use it for symmetry and in case that should cease to be true | |
3219 | with some future change. */ | |
2410d73a | 3220 | prev = NULL; |
4cb3e6b3 | 3221 | for (tail = buffer_get_overlays (buf, OV_BEFORE); tail; prev = tail, tail = next) |
1ab256cb | 3222 | { |
2410d73a SM |
3223 | next = tail->next; |
3224 | XSETMISC (overlay, tail); | |
22657b40 | 3225 | eassert (OVERLAYP (overlay)); |
1ab256cb | 3226 | |
2eec3b4e RS |
3227 | beg = OVERLAY_START (overlay); |
3228 | end = OVERLAY_END (overlay); | |
1ab256cb | 3229 | |
2eec3b4e | 3230 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3231 | { |
2eec3b4e | 3232 | /* OVERLAY needs to be moved. */ |
d311d28c | 3233 | ptrdiff_t where = OVERLAY_POSITION (beg); |
2410d73a | 3234 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3235 | |
3236 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3237 | if (prev) |
3238 | prev->next = next; | |
2eec3b4e | 3239 | else |
4cb3e6b3 | 3240 | buffer_set_overlays (buf, next, OV_BEFORE); |
2eec3b4e RS |
3241 | |
3242 | /* Search thru overlays_after for where to put it. */ | |
2410d73a | 3243 | other_prev = NULL; |
4cb3e6b3 | 3244 | for (other = buffer_get_overlays (buf, OV_AFTER); other; |
2410d73a | 3245 | other_prev = other, other = other->next) |
1ab256cb | 3246 | { |
6af718a4 | 3247 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3248 | |
2410d73a | 3249 | XSETMISC (otheroverlay, other); |
22657b40 | 3250 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3251 | |
3252 | otherbeg = OVERLAY_START (otheroverlay); | |
3253 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3254 | break; | |
1ab256cb | 3255 | } |
2eec3b4e RS |
3256 | |
3257 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3258 | tail->next = other; |
3259 | if (other_prev) | |
3260 | other_prev->next = tail; | |
1ab256cb | 3261 | else |
4cb3e6b3 | 3262 | buffer_set_overlays (buf, tail, OV_AFTER); |
2eec3b4e | 3263 | tail = prev; |
1ab256cb | 3264 | } |
2eec3b4e RS |
3265 | else |
3266 | /* We've reached the things that should stay in overlays_before. | |
3267 | All the rest of overlays_before must end even earlier, | |
3268 | so stop now. */ | |
3269 | break; | |
3270 | } | |
3271 | ||
3272 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a | 3273 | prev = NULL; |
4cb3e6b3 | 3274 | for (tail = buffer_get_overlays (buf, OV_AFTER); tail; prev = tail, tail = next) |
2eec3b4e | 3275 | { |
2410d73a SM |
3276 | next = tail->next; |
3277 | XSETMISC (overlay, tail); | |
22657b40 | 3278 | eassert (OVERLAYP (overlay)); |
2eec3b4e RS |
3279 | |
3280 | beg = OVERLAY_START (overlay); | |
3281 | end = OVERLAY_END (overlay); | |
3282 | ||
3283 | /* Stop looking, when we know that nothing further | |
3284 | can possibly end before POS. */ | |
3285 | if (OVERLAY_POSITION (beg) > pos) | |
3286 | break; | |
3287 | ||
3288 | if (OVERLAY_POSITION (end) <= pos) | |
3289 | { | |
3290 | /* OVERLAY needs to be moved. */ | |
d311d28c | 3291 | ptrdiff_t where = OVERLAY_POSITION (end); |
2410d73a | 3292 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3293 | |
3294 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3295 | if (prev) |
3296 | prev->next = next; | |
2eec3b4e | 3297 | else |
4cb3e6b3 | 3298 | buffer_set_overlays (buf, next, OV_AFTER); |
2eec3b4e RS |
3299 | |
3300 | /* Search thru overlays_before for where to put it. */ | |
2410d73a | 3301 | other_prev = NULL; |
4cb3e6b3 | 3302 | for (other = buffer_get_overlays (buf, OV_BEFORE); other; |
2410d73a | 3303 | other_prev = other, other = other->next) |
2eec3b4e RS |
3304 | { |
3305 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3306 | |
2410d73a | 3307 | XSETMISC (otheroverlay, other); |
22657b40 | 3308 | eassert (OVERLAYP (otheroverlay)); |
2eec3b4e RS |
3309 | |
3310 | otherend = OVERLAY_END (otheroverlay); | |
3311 | if (OVERLAY_POSITION (otherend) <= where) | |
3312 | break; | |
3313 | } | |
3314 | ||
3315 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3316 | tail->next = other; |
3317 | if (other_prev) | |
3318 | other_prev->next = tail; | |
2eec3b4e | 3319 | else |
4cb3e6b3 | 3320 | buffer_set_overlays (buf, tail, OV_BEFORE); |
2eec3b4e RS |
3321 | tail = prev; |
3322 | } | |
3323 | } | |
3324 | ||
c2d5b10f | 3325 | buf->overlay_center = pos; |
2eec3b4e | 3326 | } |
2b1bdf65 | 3327 | |
423cdb46 | 3328 | void |
d311d28c | 3329 | adjust_overlays_for_insert (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 KH |
3330 | { |
3331 | /* After an insertion, the lists are still sorted properly, | |
3332 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3333 | if (current_buffer->overlay_center >= pos) |
3334 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3335 | } |
3336 | ||
3337 | void | |
d311d28c | 3338 | adjust_overlays_for_delete (ptrdiff_t pos, ptrdiff_t length) |
423cdb46 | 3339 | { |
c2d5b10f | 3340 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3341 | /* The deletion was to our right. No change needed; the before- and |
3342 | after-lists are still consistent. */ | |
3343 | ; | |
d311d28c | 3344 | else if (current_buffer->overlay_center - pos > length) |
423cdb46 KH |
3345 | /* The deletion was to our left. We need to adjust the center value |
3346 | to account for the change in position, but the lists are consistent | |
3347 | given the new value. */ | |
c2d5b10f | 3348 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3349 | else |
3350 | /* We're right in the middle. There might be things on the after-list | |
3351 | that now belong on the before-list. Recentering will move them, | |
3352 | and also update the center point. */ | |
3353 | recenter_overlay_lists (current_buffer, pos); | |
3354 | } | |
3355 | ||
2b1bdf65 KH |
3356 | /* Fix up overlays that were garbled as a result of permuting markers |
3357 | in the range START through END. Any overlay with at least one | |
3358 | endpoint in this range will need to be unlinked from the overlay | |
3359 | list and reinserted in its proper place. | |
3360 | Such an overlay might even have negative size at this point. | |
6b61353c | 3361 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3362 | void |
d311d28c | 3363 | fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end) |
2b1bdf65 | 3364 | { |
6af718a4 | 3365 | Lisp_Object overlay; |
5df8f01b PE |
3366 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3367 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3368 | /* These are either nil, indicating that before_list or after_list |
3369 | should be assigned, or the cons cell the cdr of which should be | |
3370 | assigned. */ | |
2410d73a | 3371 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 | 3372 | /* 'Parent', likewise, indicates a cons cell or |
4cb3e6b3 | 3373 | before or after overlays list, depending |
1138e742 | 3374 | which loop we're in. */ |
2410d73a | 3375 | struct Lisp_Overlay *tail, *parent; |
d311d28c | 3376 | ptrdiff_t startpos, endpos; |
2b1bdf65 KH |
3377 | |
3378 | /* This algorithm shifts links around instead of consing and GCing. | |
3379 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3380 | well-formed list except that its last element, the CDR of beforep |
3381 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3382 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3383 | that before_list isn't initialized, although it may look | |
3384 | strange. */ | |
4cb3e6b3 | 3385 | for (parent = NULL, tail = buffer_get_overlays (NULL, OV_BEFORE); tail;) |
2b1bdf65 | 3386 | { |
2410d73a | 3387 | XSETMISC (overlay, tail); |
6b61353c | 3388 | |
2b1bdf65 | 3389 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3390 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3391 | ||
3392 | /* If the overlay is backwards, make it empty. */ | |
3393 | if (endpos < startpos) | |
3394 | { | |
3395 | startpos = endpos; | |
3396 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3397 | Qnil); | |
3398 | } | |
3399 | ||
2b1bdf65 KH |
3400 | if (endpos < start) |
3401 | break; | |
60ebfdf3 | 3402 | |
2b1bdf65 KH |
3403 | if (endpos < end |
3404 | || (startpos >= start && startpos < end)) | |
3405 | { | |
2b1bdf65 KH |
3406 | /* Add it to the end of the wrong list. Later on, |
3407 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3408 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3409 | { |
2410d73a | 3410 | if (!afterp) |
1138e742 KR |
3411 | after_list = tail; |
3412 | else | |
2410d73a | 3413 | afterp->next = tail; |
1138e742 | 3414 | afterp = tail; |
2b1bdf65 KH |
3415 | } |
3416 | else | |
3417 | { | |
2410d73a | 3418 | if (!beforep) |
1138e742 KR |
3419 | before_list = tail; |
3420 | else | |
2410d73a | 3421 | beforep->next = tail; |
1138e742 | 3422 | beforep = tail; |
2b1bdf65 | 3423 | } |
2410d73a | 3424 | if (!parent) |
4cb3e6b3 | 3425 | buffer_set_overlays (NULL, tail->next, OV_BEFORE); |
1138e742 | 3426 | else |
2410d73a SM |
3427 | parent->next = tail->next; |
3428 | tail = tail->next; | |
2b1bdf65 KH |
3429 | } |
3430 | else | |
2410d73a | 3431 | parent = tail, tail = parent->next; |
2b1bdf65 | 3432 | } |
4cb3e6b3 | 3433 | for (parent = NULL, tail = buffer_get_overlays (NULL, OV_AFTER); tail;) |
2b1bdf65 | 3434 | { |
2410d73a | 3435 | XSETMISC (overlay, tail); |
6b61353c | 3436 | |
2b1bdf65 | 3437 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3438 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3439 | ||
3440 | /* If the overlay is backwards, make it empty. */ | |
3441 | if (endpos < startpos) | |
3442 | { | |
3443 | startpos = endpos; | |
3444 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3445 | Qnil); |
6b61353c KH |
3446 | } |
3447 | ||
2b1bdf65 KH |
3448 | if (startpos >= end) |
3449 | break; | |
6b61353c | 3450 | |
2b1bdf65 KH |
3451 | if (startpos >= start |
3452 | || (endpos >= start && endpos < end)) | |
3453 | { | |
c2d5b10f | 3454 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3455 | { |
2410d73a | 3456 | if (!afterp) |
1138e742 KR |
3457 | after_list = tail; |
3458 | else | |
2410d73a | 3459 | afterp->next = tail; |
1138e742 | 3460 | afterp = tail; |
2b1bdf65 KH |
3461 | } |
3462 | else | |
3463 | { | |
2410d73a | 3464 | if (!beforep) |
1138e742 KR |
3465 | before_list = tail; |
3466 | else | |
2410d73a | 3467 | beforep->next = tail; |
1138e742 | 3468 | beforep = tail; |
2b1bdf65 | 3469 | } |
2410d73a | 3470 | if (!parent) |
4cb3e6b3 | 3471 | buffer_set_overlays (NULL, tail->next, OV_AFTER); |
1138e742 | 3472 | else |
2410d73a SM |
3473 | parent->next = tail->next; |
3474 | tail = tail->next; | |
2b1bdf65 KH |
3475 | } |
3476 | else | |
2410d73a | 3477 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3478 | } |
3479 | ||
3480 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3481 | and let the recenter function make it sane again. */ | |
2410d73a | 3482 | if (beforep) |
1138e742 | 3483 | { |
4cb3e6b3 DA |
3484 | beforep->next = buffer_get_overlays (NULL, OV_BEFORE); |
3485 | buffer_set_overlays (NULL, before_list, OV_BEFORE); | |
1138e742 | 3486 | } |
c2d5b10f | 3487 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3488 | |
2410d73a | 3489 | if (afterp) |
1138e742 | 3490 | { |
4cb3e6b3 DA |
3491 | afterp->next = buffer_get_overlays (NULL, OV_AFTER); |
3492 | buffer_set_overlays (NULL, after_list, OV_AFTER); | |
1138e742 | 3493 | } |
c2d5b10f | 3494 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3495 | } |
3b06f880 KH |
3496 | |
3497 | /* We have two types of overlay: the one whose ending marker is | |
3498 | after-insertion-marker (this is the usual case) and the one whose | |
3499 | ending marker is before-insertion-marker. When `overlays_before' | |
3500 | contains overlays of the latter type and the former type in this | |
3501 | order and both overlays end at inserting position, inserting a text | |
3502 | increases only the ending marker of the latter type, which results | |
3503 | in incorrect ordering of `overlays_before'. | |
3504 | ||
3505 | This function fixes ordering of overlays in the slot | |
3506 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3507 | was at PREV, and now is at POS. */ | |
3508 | ||
01136e9b | 3509 | void |
d311d28c | 3510 | fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos) |
3b06f880 | 3511 | { |
2410d73a | 3512 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
4cb3e6b3 DA |
3513 | struct Lisp_Overlay *tail = buffer_get_overlays (bp, OV_BEFORE); |
3514 | struct Lisp_Overlay *parent = NULL, *right_pair; | |
2410d73a | 3515 | Lisp_Object tem; |
d311d28c | 3516 | ptrdiff_t end IF_LINT (= 0); |
3b06f880 KH |
3517 | |
3518 | /* After the insertion, the several overlays may be in incorrect | |
3519 | order. The possibility is that, in the list `overlays_before', | |
3520 | an overlay which ends at POS appears after an overlay which ends | |
3521 | at PREV. Since POS is greater than PREV, we must fix the | |
3522 | ordering of these overlays, by moving overlays ends at POS before | |
3523 | the overlays ends at PREV. */ | |
3524 | ||
3525 | /* At first, find a place where disordered overlays should be linked | |
3526 | in. It is where an overlay which end before POS exists. (i.e. an | |
3527 | overlay whose ending marker is after-insertion-marker if disorder | |
3528 | exists). */ | |
2410d73a SM |
3529 | while (tail |
3530 | && (XSETMISC (tem, tail), | |
3531 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3532 | { |
3533 | parent = tail; | |
2410d73a | 3534 | tail = tail->next; |
1138e742 | 3535 | } |
3b06f880 KH |
3536 | |
3537 | /* If we don't find such an overlay, | |
3538 | or the found one ends before PREV, | |
3539 | or the found one is the last one in the list, | |
3540 | we don't have to fix anything. */ | |
f93ad4cf | 3541 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3542 | return; |
3543 | ||
1138e742 KR |
3544 | right_pair = parent; |
3545 | parent = tail; | |
2410d73a | 3546 | tail = tail->next; |
3b06f880 | 3547 | |
1138e742 | 3548 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3549 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3550 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3551 | we found an overlay which ends before PREV, the remaining | |
3552 | overlays are in correct order. */ | |
2410d73a | 3553 | while (tail) |
3b06f880 | 3554 | { |
2410d73a SM |
3555 | XSETMISC (tem, tail); |
3556 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3557 | |
3558 | if (end == pos) | |
3559 | { /* This overlay is disordered. */ | |
2410d73a | 3560 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3561 | |
3562 | /* Unlink the found overlay. */ | |
2410d73a SM |
3563 | tail = found->next; |
3564 | parent->next = tail; | |
1138e742 KR |
3565 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3566 | and link it into the right place. */ | |
2410d73a | 3567 | if (!right_pair) |
1138e742 | 3568 | { |
4cb3e6b3 DA |
3569 | found->next = buffer_get_overlays (bp, OV_BEFORE); |
3570 | buffer_set_overlays (bp, found, OV_BEFORE); | |
1138e742 KR |
3571 | } |
3572 | else | |
3573 | { | |
2410d73a SM |
3574 | found->next = right_pair->next; |
3575 | right_pair->next = found; | |
1138e742 | 3576 | } |
3b06f880 KH |
3577 | } |
3578 | else if (end == prev) | |
1138e742 KR |
3579 | { |
3580 | parent = tail; | |
2410d73a | 3581 | tail = tail->next; |
1138e742 | 3582 | } |
3b06f880 KH |
3583 | else /* No more disordered overlay. */ |
3584 | break; | |
3585 | } | |
3586 | } | |
2eec3b4e | 3587 | \f |
52f8ec73 | 3588 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3589 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3590 | (Lisp_Object object) |
52f8ec73 JB |
3591 | { |
3592 | return (OVERLAYP (object) ? Qt : Qnil); | |
3593 | } | |
3594 | ||
acac2700 | 3595 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3596 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3597 | If omitted, BUFFER defaults to the current buffer. |
3598 | BEG and END may be integers or markers. | |
a625ee20 RS |
3599 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3600 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3601 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3602 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3603 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3604 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3605 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3606 | { |
3607 | Lisp_Object overlay; | |
5c4f68f1 | 3608 | struct buffer *b; |
2eec3b4e | 3609 | |
5c4f68f1 | 3610 | if (NILP (buffer)) |
67180c6a | 3611 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3612 | else |
b7826503 | 3613 | CHECK_BUFFER (buffer); |
883047b9 JB |
3614 | if (MARKERP (beg) |
3615 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3616 | error ("Marker points into wrong buffer"); | |
3617 | if (MARKERP (end) | |
3618 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3619 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3620 | |
b7826503 PJ |
3621 | CHECK_NUMBER_COERCE_MARKER (beg); |
3622 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3623 | |
883047b9 | 3624 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3625 | { |
c99fc30f KH |
3626 | Lisp_Object temp; |
3627 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3628 | } |
883047b9 JB |
3629 | |
3630 | b = XBUFFER (buffer); | |
3631 | ||
3632 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3633 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3634 | |
acac2700 RS |
3635 | if (!NILP (front_advance)) |
3636 | XMARKER (beg)->insertion_type = 1; | |
3637 | if (!NILP (rear_advance)) | |
3638 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3639 | |
d7a7fda3 | 3640 | overlay = build_overlay (beg, end, Qnil); |
2eec3b4e | 3641 | |
177c0ea7 | 3642 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3643 | end = OVERLAY_END (overlay); |
c2d5b10f | 3644 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3645 | { |
4cb3e6b3 DA |
3646 | if (buffer_get_overlays (b, OV_AFTER)) |
3647 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER); | |
3648 | buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER); | |
2410d73a | 3649 | } |
2eec3b4e | 3650 | else |
2410d73a | 3651 | { |
4cb3e6b3 DA |
3652 | if (buffer_get_overlays (b, OV_BEFORE)) |
3653 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE); | |
3654 | buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE); | |
2410d73a | 3655 | } |
2eec3b4e RS |
3656 | |
3657 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3658 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3659 | |
b61982dd JB |
3660 | /* We don't need to redisplay the region covered by the overlay, because |
3661 | the overlay has no properties at the moment. */ | |
3662 | ||
2eec3b4e RS |
3663 | return overlay; |
3664 | } | |
876aa27c RS |
3665 | \f |
3666 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3667 | ||
3668 | static void | |
d311d28c | 3669 | modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end) |
876aa27c | 3670 | { |
876aa27c RS |
3671 | if (start > end) |
3672 | { | |
d311d28c | 3673 | ptrdiff_t temp = start; |
26f545d7 GM |
3674 | start = end; |
3675 | end = temp; | |
876aa27c RS |
3676 | } |
3677 | ||
481b5054 | 3678 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3679 | |
876aa27c RS |
3680 | /* If this is a buffer not in the selected window, |
3681 | we must do other windows. */ | |
d3d50620 | 3682 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) |
876aa27c | 3683 | windows_or_buffers_changed = 1; |
876aa27c RS |
3684 | /* If multiple windows show this buffer, we must do other windows. */ |
3685 | else if (buffer_shared > 1) | |
3686 | windows_or_buffers_changed = 1; | |
18700091 KS |
3687 | /* If we modify an overlay at the end of the buffer, we cannot |
3688 | be sure that window end is still valid. */ | |
3689 | else if (end >= ZV && start <= ZV) | |
3690 | windows_or_buffers_changed = 1; | |
876aa27c | 3691 | |
d8b9150f | 3692 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3693 | } |
2eec3b4e | 3694 | |
7b7ae965 DA |
3695 | /* Remove OVERLAY from LIST. */ |
3696 | ||
2410d73a | 3697 | static struct Lisp_Overlay * |
d3da34e0 | 3698 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a | 3699 | { |
7b7ae965 DA |
3700 | register struct Lisp_Overlay *tail, **prev = &list; |
3701 | ||
3702 | for (tail = list; tail; prev = &tail->next, tail = *prev) | |
3703 | if (tail == overlay) | |
2410d73a | 3704 | { |
7b7ae965 | 3705 | *prev = overlay->next; |
2410d73a SM |
3706 | overlay->next = NULL; |
3707 | break; | |
3708 | } | |
3709 | return list; | |
3710 | } | |
3711 | ||
4cb3e6b3 DA |
3712 | /* Remove OVERLAY from both overlay lists of B. */ |
3713 | ||
3714 | static void | |
3715 | unchain_both (struct buffer *b, Lisp_Object overlay) | |
3716 | { | |
3717 | struct Lisp_Overlay *ov = XOVERLAY (overlay); | |
3718 | ||
3719 | buffer_set_overlays | |
3720 | (b, unchain_overlay (buffer_get_overlays (b, OV_BEFORE), ov), OV_BEFORE); | |
3721 | buffer_set_overlays | |
3722 | (b, unchain_overlay (buffer_get_overlays (b, OV_AFTER), ov), OV_AFTER); | |
3723 | } | |
3724 | ||
5c4f68f1 | 3725 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3726 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3727 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3728 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3729 | buffer. */) |
5842a27b | 3730 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3731 | { |
471fe23d | 3732 | struct buffer *b, *ob = 0; |
0a4469c9 | 3733 | Lisp_Object obuffer; |
d311d28c | 3734 | ptrdiff_t count = SPECPDL_INDEX (); |
471fe23d | 3735 | ptrdiff_t n_beg, n_end, o_beg IF_LINT (= 0), o_end IF_LINT (= 0); |
5c4f68f1 | 3736 | |
b7826503 | 3737 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3738 | if (NILP (buffer)) |
3739 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3740 | if (NILP (buffer)) |
67180c6a | 3741 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3742 | CHECK_BUFFER (buffer); |
883047b9 | 3743 | |
471fe23d TN |
3744 | if (NILP (Fbuffer_live_p (buffer))) |
3745 | error ("Attempt to move overlay to a dead buffer"); | |
3746 | ||
883047b9 JB |
3747 | if (MARKERP (beg) |
3748 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3749 | error ("Marker points into wrong buffer"); | |
3750 | if (MARKERP (end) | |
3751 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3752 | error ("Marker points into wrong buffer"); | |
3753 | ||
b7826503 PJ |
3754 | CHECK_NUMBER_COERCE_MARKER (beg); |
3755 | CHECK_NUMBER_COERCE_MARKER (end); | |
d311d28c | 3756 | |
471fe23d | 3757 | if (XINT (beg) > XINT (end)) |
02481186 | 3758 | { |
471fe23d TN |
3759 | Lisp_Object temp; |
3760 | temp = beg; beg = end; end = temp; | |
02481186 PE |
3761 | } |
3762 | ||
9d7608b7 KH |
3763 | specbind (Qinhibit_quit, Qt); |
3764 | ||
0a4469c9 | 3765 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
79cce3f2 | 3766 | b = XBUFFER (buffer); |
471fe23d TN |
3767 | |
3768 | if (!NILP (obuffer)) | |
3769 | { | |
3770 | ob = XBUFFER (obuffer); | |
3771 | ||
3772 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3773 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3774 | ||
4cb3e6b3 | 3775 | unchain_both (ob, overlay); |
471fe23d TN |
3776 | eassert (XOVERLAY (overlay)->next == NULL); |
3777 | } | |
3778 | ||
3779 | /* Set the overlay boundaries, which may clip them. */ | |
3780 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3781 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
3782 | ||
3783 | n_beg = marker_position (OVERLAY_START (overlay)); | |
3784 | n_end = marker_position (OVERLAY_END (overlay)); | |
2eec3b4e | 3785 | |
c82ed728 | 3786 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3787 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3788 | { |
3789 | /* Redisplay where the overlay was. */ | |
471fe23d TN |
3790 | if (ob) |
3791 | modify_overlay (ob, o_beg, o_end); | |
50760c4a RS |
3792 | |
3793 | /* Redisplay where the overlay is going to be. */ | |
79cce3f2 | 3794 | modify_overlay (b, n_beg, n_end); |
50760c4a | 3795 | } |
c82ed728 JB |
3796 | else |
3797 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3798 | { | |
79cce3f2 PE |
3799 | if (o_beg == n_beg) |
3800 | modify_overlay (b, o_end, n_end); | |
3801 | else if (o_end == n_end) | |
3802 | modify_overlay (b, o_beg, n_beg); | |
c82ed728 | 3803 | else |
79cce3f2 | 3804 | modify_overlay (b, min (o_beg, n_beg), max (o_end, n_end)); |
c82ed728 | 3805 | } |
b61982dd | 3806 | |
471fe23d TN |
3807 | /* Delete the overlay if it is empty after clipping and has the |
3808 | evaporate property. */ | |
3809 | if (n_beg == n_end && !NILP (Foverlay_get (overlay, Qevaporate))) | |
3810 | return unbind_to (count, Fdelete_overlay (overlay)); | |
02481186 | 3811 | |
471fe23d TN |
3812 | /* Put the overlay into the new buffer's overlay lists, first on the |
3813 | wrong list. */ | |
3814 | if (n_end < b->overlay_center) | |
2410d73a | 3815 | { |
4cb3e6b3 DA |
3816 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER); |
3817 | buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER); | |
2410d73a | 3818 | } |
2eec3b4e | 3819 | else |
2410d73a | 3820 | { |
4cb3e6b3 DA |
3821 | XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE); |
3822 | buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE); | |
2410d73a | 3823 | } |
2eec3b4e RS |
3824 | |
3825 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3826 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3827 | |
0a4469c9 | 3828 | return unbind_to (count, overlay); |
2eec3b4e RS |
3829 | } |
3830 | ||
3831 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3832 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3833 | (Lisp_Object overlay) |
2eec3b4e | 3834 | { |
0a4469c9 | 3835 | Lisp_Object buffer; |
5c4f68f1 | 3836 | struct buffer *b; |
d311d28c | 3837 | ptrdiff_t count = SPECPDL_INDEX (); |
5c4f68f1 | 3838 | |
b7826503 | 3839 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3840 | |
0a4469c9 RS |
3841 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3842 | if (NILP (buffer)) | |
3843 | return Qnil; | |
3844 | ||
3845 | b = XBUFFER (buffer); | |
0a4469c9 | 3846 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3847 | |
4cb3e6b3 | 3848 | unchain_both (b, overlay); |
2410d73a | 3849 | eassert (XOVERLAY (overlay)->next == NULL); |
471fe23d | 3850 | |
041a49a6 | 3851 | drop_overlay (b, XOVERLAY (overlay)); |
3ece337a | 3852 | |
e58c389d | 3853 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3854 | display optimizations for the affected buffer, on the basis that |
3855 | these strings may contain newlines. This is easier to do than to | |
3856 | check for that situation during redisplay. */ | |
3857 | if (!windows_or_buffers_changed | |
3858 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3859 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3860 | b->prevent_redisplay_optimizations_p = 1; | |
3861 | ||
0a4469c9 | 3862 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3863 | } |
3864 | \f | |
8ebafa8d JB |
3865 | /* Overlay dissection functions. */ |
3866 | ||
a7ca3326 | 3867 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3868 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3869 | (Lisp_Object overlay) |
8ebafa8d | 3870 | { |
b7826503 | 3871 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3872 | |
3873 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3874 | } | |
3875 | ||
a7ca3326 | 3876 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3877 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3878 | (Lisp_Object overlay) |
8ebafa8d | 3879 | { |
b7826503 | 3880 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3881 | |
3882 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3883 | } | |
3884 | ||
3885 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3886 | doc: /* Return the buffer OVERLAY belongs to. |
3887 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3888 | (Lisp_Object overlay) |
8ebafa8d | 3889 | { |
b7826503 | 3890 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3891 | |
3892 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3893 | } | |
3894 | ||
3895 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3896 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3897 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3898 | OVERLAY. */) |
5842a27b | 3899 | (Lisp_Object overlay) |
8ebafa8d | 3900 | { |
b7826503 | 3901 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3902 | |
c644523b | 3903 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3904 | } |
3905 | ||
3906 | \f | |
2eec3b4e | 3907 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3908 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3909 | (Lisp_Object pos) |
2eec3b4e | 3910 | { |
b081724f | 3911 | ptrdiff_t len, noverlays; |
2eec3b4e | 3912 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3913 | Lisp_Object result; |
3914 | ||
b7826503 | 3915 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3916 | |
3917 | len = 10; | |
a9800ae8 | 3918 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
38182d90 | 3919 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3920 | |
3921 | /* Put all the overlays we want in a vector in overlay_vec. | |
3922 | Store the length in len. */ | |
2a77a7d7 | 3923 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3924 | 0, 0, 0); |
2eec3b4e RS |
3925 | |
3926 | /* Make a list of them all. */ | |
3927 | result = Flist (noverlays, overlay_vec); | |
3928 | ||
9ac0d9e0 | 3929 | xfree (overlay_vec); |
2eec3b4e RS |
3930 | return result; |
3931 | } | |
3932 | ||
74514898 | 3933 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3934 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3935 | Overlap means that at least one character is contained within the overlay |
3936 | and also contained within the specified region. | |
7723e095 MR |
3937 | Empty overlays are included in the result if they are located at BEG, |
3938 | between BEG and END, or at END provided END denotes the position at the | |
3939 | end of the buffer. */) | |
5842a27b | 3940 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3941 | { |
21514da7 | 3942 | ptrdiff_t len, noverlays; |
74514898 | 3943 | Lisp_Object *overlay_vec; |
74514898 RS |
3944 | Lisp_Object result; |
3945 | ||
b7826503 PJ |
3946 | CHECK_NUMBER_COERCE_MARKER (beg); |
3947 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3948 | |
3949 | len = 10; | |
38182d90 | 3950 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
74514898 RS |
3951 | |
3952 | /* Put all the overlays we want in a vector in overlay_vec. | |
3953 | Store the length in len. */ | |
3954 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3955 | NULL, NULL); |
74514898 RS |
3956 | |
3957 | /* Make a list of them all. */ | |
3958 | result = Flist (noverlays, overlay_vec); | |
3959 | ||
3960 | xfree (overlay_vec); | |
3961 | return result; | |
3962 | } | |
3963 | ||
a7ca3326 | 3964 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3965 | 1, 1, 0, |
7ee72033 | 3966 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3967 | If there are no overlay boundaries from POS to (point-max), |
3968 | the value is (point-max). */) | |
5842a27b | 3969 | (Lisp_Object pos) |
2eec3b4e | 3970 | { |
b081724f | 3971 | ptrdiff_t i, len, noverlays; |
d311d28c | 3972 | ptrdiff_t endpos; |
2eec3b4e | 3973 | Lisp_Object *overlay_vec; |
2eec3b4e | 3974 | |
b7826503 | 3975 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3976 | |
3977 | len = 10; | |
38182d90 | 3978 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
2eec3b4e RS |
3979 | |
3980 | /* Put all the overlays we want in a vector in overlay_vec. | |
3981 | Store the length in len. | |
3982 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3983 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 3984 | &endpos, 0, 1); |
2eec3b4e RS |
3985 | |
3986 | /* If any of these overlays ends before endpos, | |
3987 | use its ending point instead. */ | |
3988 | for (i = 0; i < noverlays; i++) | |
3989 | { | |
3990 | Lisp_Object oend; | |
d311d28c | 3991 | ptrdiff_t oendpos; |
2eec3b4e RS |
3992 | |
3993 | oend = OVERLAY_END (overlay_vec[i]); | |
3994 | oendpos = OVERLAY_POSITION (oend); | |
3995 | if (oendpos < endpos) | |
3996 | endpos = oendpos; | |
1ab256cb RM |
3997 | } |
3998 | ||
9ac0d9e0 | 3999 | xfree (overlay_vec); |
2eec3b4e RS |
4000 | return make_number (endpos); |
4001 | } | |
239c932b | 4002 | |
a7ca3326 | 4003 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4004 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4005 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4006 | If there are no overlay boundaries from (point-min) to POS, |
4007 | the value is (point-min). */) | |
5842a27b | 4008 | (Lisp_Object pos) |
239c932b | 4009 | { |
d311d28c | 4010 | ptrdiff_t prevpos; |
239c932b | 4011 | Lisp_Object *overlay_vec; |
b081724f | 4012 | ptrdiff_t len; |
239c932b | 4013 | |
b7826503 | 4014 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4015 | |
624bbdc4 RS |
4016 | /* At beginning of buffer, we know the answer; |
4017 | avoid bug subtracting 1 below. */ | |
4018 | if (XINT (pos) == BEGV) | |
4019 | return pos; | |
4020 | ||
017f0539 | 4021 | len = 10; |
38182d90 | 4022 | overlay_vec = xmalloc (len * sizeof *overlay_vec); |
017f0539 | 4023 | |
239c932b RS |
4024 | /* Put all the overlays we want in a vector in overlay_vec. |
4025 | Store the length in len. | |
daa1c109 | 4026 | prevpos gets the position of the previous change. */ |
328ab8e7 | 4027 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
d311d28c | 4028 | 0, &prevpos, 1); |
239c932b | 4029 | |
239c932b RS |
4030 | xfree (overlay_vec); |
4031 | return make_number (prevpos); | |
4032 | } | |
2eec3b4e RS |
4033 | \f |
4034 | /* These functions are for debugging overlays. */ | |
4035 | ||
4036 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4037 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4038 | The car has all the overlays before the overlay center; |
4039 | the cdr has all the overlays after the overlay center. | |
4040 | Recentering overlays moves overlays between these lists. | |
4041 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4042 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4043 | (void) |
2eec3b4e | 4044 | { |
2410d73a SM |
4045 | struct Lisp_Overlay *ol; |
4046 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4cb3e6b3 DA |
4047 | |
4048 | for (ol = buffer_get_overlays (NULL, OV_BEFORE); ol; ol = ol->next) | |
2410d73a SM |
4049 | { |
4050 | XSETMISC (tmp, ol); | |
4051 | before = Fcons (tmp, before); | |
4052 | } | |
4cb3e6b3 DA |
4053 | |
4054 | for (ol = buffer_get_overlays (NULL, OV_AFTER); ol; ol = ol->next) | |
2410d73a SM |
4055 | { |
4056 | XSETMISC (tmp, ol); | |
4057 | after = Fcons (tmp, after); | |
4058 | } | |
4cb3e6b3 | 4059 | |
2410d73a | 4060 | return Fcons (Fnreverse (before), Fnreverse (after)); |
2eec3b4e RS |
4061 | } |
4062 | ||
4063 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4064 | doc: /* Recenter the overlays of the current buffer around position POS. |
4065 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4066 | for positions far away from POS). */) | |
5842a27b | 4067 | (Lisp_Object pos) |
2eec3b4e | 4068 | { |
d311d28c | 4069 | ptrdiff_t p; |
b7826503 | 4070 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4071 | |
d311d28c PE |
4072 | p = clip_to_bounds (PTRDIFF_MIN, XINT (pos), PTRDIFF_MAX); |
4073 | recenter_overlay_lists (current_buffer, p); | |
2eec3b4e RS |
4074 | return Qnil; |
4075 | } | |
4076 | \f | |
a7ca3326 | 4077 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4078 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4079 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4080 | { |
b7826503 | 4081 | CHECK_OVERLAY (overlay); |
c644523b | 4082 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4083 | } |
4084 | ||
4085 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4086 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4087 | VALUE will be returned.*/) | |
5842a27b | 4088 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4089 | { |
48e2e3ba | 4090 | Lisp_Object tail, buffer; |
9d7608b7 | 4091 | int changed; |
2eec3b4e | 4092 | |
b7826503 | 4093 | CHECK_OVERLAY (overlay); |
b61982dd | 4094 | |
274a9425 RS |
4095 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4096 | ||
c644523b | 4097 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4098 | CONSP (tail) && CONSP (XCDR (tail)); |
4099 | tail = XCDR (XCDR (tail))) | |
4100 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4101 | { |
7539e11f | 4102 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4103 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4104 | goto found; |
274a9425 | 4105 | } |
9d7608b7 KH |
4106 | /* It wasn't in the list, so add it to the front. */ |
4107 | changed = !NILP (value); | |
c644523b DA |
4108 | set_overlay_plist |
4109 | (overlay, Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist))); | |
9d7608b7 KH |
4110 | found: |
4111 | if (! NILP (buffer)) | |
4112 | { | |
4113 | if (changed) | |
876aa27c | 4114 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4115 | marker_position (OVERLAY_START (overlay)), |
4116 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4117 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4118 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4119 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4120 | Fdelete_overlay (overlay); | |
4121 | } | |
7d63db98 | 4122 | |
2eec3b4e | 4123 | return value; |
1ab256cb RM |
4124 | } |
4125 | \f | |
9115729e KH |
4126 | /* Subroutine of report_overlay_modification. */ |
4127 | ||
4128 | /* Lisp vector holding overlay hook functions to call. | |
4129 | Vector elements come in pairs. | |
4130 | Each even-index element is a list of hook functions. | |
4131 | The following odd-index element is the overlay they came from. | |
4132 | ||
4133 | Before the buffer change, we fill in this vector | |
4134 | as we call overlay hook functions. | |
4135 | After the buffer change, we get the functions to call from this vector. | |
4136 | This way we always call the same functions before and after the change. */ | |
4137 | static Lisp_Object last_overlay_modification_hooks; | |
4138 | ||
4139 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
d311d28c | 4140 | static ptrdiff_t last_overlay_modification_hooks_used; |
9115729e KH |
4141 | |
4142 | /* Add one functionlist/overlay pair | |
4143 | to the end of last_overlay_modification_hooks. */ | |
4144 | ||
4145 | static void | |
d3da34e0 | 4146 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4147 | { |
d311d28c | 4148 | ptrdiff_t oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e | 4149 | |
d311d28c PE |
4150 | if (oldsize - 1 <= last_overlay_modification_hooks_used) |
4151 | last_overlay_modification_hooks = | |
4152 | larger_vector (last_overlay_modification_hooks, 2, -1); | |
3ae565b3 SM |
4153 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4154 | functionlist); last_overlay_modification_hooks_used++; | |
4155 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4156 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4157 | } |
4158 | \f | |
173f2a64 RS |
4159 | /* Run the modification-hooks of overlays that include |
4160 | any part of the text in START to END. | |
9115729e KH |
4161 | If this change is an insertion, also |
4162 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4163 | and the insert-after-hooks of overlay ending at START. |
4164 | ||
4165 | This is called both before and after the modification. | |
4166 | AFTER is nonzero when we call after the modification. | |
4167 | ||
9115729e KH |
4168 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4169 | When AFTER is nonzero, they are the start position, | |
4170 | the position after the inserted new text, | |
4171 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4172 | |
4173 | void | |
d3da34e0 JB |
4174 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4175 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4176 | { |
2410d73a SM |
4177 | Lisp_Object prop, overlay; |
4178 | struct Lisp_Overlay *tail; | |
9115729e KH |
4179 | /* 1 if this change is an insertion. */ |
4180 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4181 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4182 | |
4183 | overlay = Qnil; | |
2410d73a | 4184 | tail = NULL; |
9115729e | 4185 | |
27c6b98e SM |
4186 | /* We used to run the functions as soon as we found them and only register |
4187 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4188 | case. But running elisp code as we traverse the list of overlays is | |
4189 | painful because the list can be modified by the elisp code so we had to | |
4190 | copy at several places. We now simply do a read-only traversal that | |
4191 | only collects the functions to run and we run them afterwards. It's | |
4192 | simpler, especially since all the code was already there. -stef */ | |
4193 | ||
a615c6dc | 4194 | if (!after) |
173f2a64 | 4195 | { |
a615c6dc SM |
4196 | /* We are being called before a change. |
4197 | Scan the overlays to find the functions to call. */ | |
4198 | last_overlay_modification_hooks_used = 0; | |
4cb3e6b3 | 4199 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
173f2a64 | 4200 | { |
d311d28c | 4201 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4202 | Lisp_Object ostart, oend; |
4203 | ||
2410d73a | 4204 | XSETMISC (overlay, tail); |
a615c6dc SM |
4205 | |
4206 | ostart = OVERLAY_START (overlay); | |
4207 | oend = OVERLAY_END (overlay); | |
4208 | endpos = OVERLAY_POSITION (oend); | |
4209 | if (XFASTINT (start) > endpos) | |
4210 | break; | |
4211 | startpos = OVERLAY_POSITION (ostart); | |
4212 | if (insertion && (XFASTINT (start) == startpos | |
4213 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4214 | { |
a615c6dc SM |
4215 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4216 | if (!NILP (prop)) | |
4217 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4218 | } |
a615c6dc SM |
4219 | if (insertion && (XFASTINT (start) == endpos |
4220 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4221 | { |
a615c6dc SM |
4222 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4223 | if (!NILP (prop)) | |
4224 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4225 | } |
a615c6dc SM |
4226 | /* Test for intersecting intervals. This does the right thing |
4227 | for both insertion and deletion. */ | |
4228 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4229 | { |
a615c6dc SM |
4230 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4231 | if (!NILP (prop)) | |
4232 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4233 | } |
173f2a64 | 4234 | } |
60ebfdf3 | 4235 | |
4cb3e6b3 | 4236 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
173f2a64 | 4237 | { |
d311d28c | 4238 | ptrdiff_t startpos, endpos; |
a615c6dc SM |
4239 | Lisp_Object ostart, oend; |
4240 | ||
2410d73a | 4241 | XSETMISC (overlay, tail); |
a615c6dc SM |
4242 | |
4243 | ostart = OVERLAY_START (overlay); | |
4244 | oend = OVERLAY_END (overlay); | |
4245 | startpos = OVERLAY_POSITION (ostart); | |
4246 | endpos = OVERLAY_POSITION (oend); | |
4247 | if (XFASTINT (end) < startpos) | |
4248 | break; | |
4249 | if (insertion && (XFASTINT (start) == startpos | |
4250 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4251 | { |
a615c6dc SM |
4252 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4253 | if (!NILP (prop)) | |
4254 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4255 | } |
a615c6dc SM |
4256 | if (insertion && (XFASTINT (start) == endpos |
4257 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4258 | { |
a615c6dc SM |
4259 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4260 | if (!NILP (prop)) | |
4261 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4262 | } |
a615c6dc SM |
4263 | /* Test for intersecting intervals. This does the right thing |
4264 | for both insertion and deletion. */ | |
4265 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4266 | { |
a615c6dc SM |
4267 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4268 | if (!NILP (prop)) | |
4269 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4270 | } |
173f2a64 RS |
4271 | } |
4272 | } | |
55b48893 | 4273 | |
a615c6dc SM |
4274 | GCPRO4 (overlay, arg1, arg2, arg3); |
4275 | { | |
4276 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4277 | First copy the vector contents, in case some of these hooks | |
4278 | do subsequent modification of the buffer. */ | |
d311d28c | 4279 | ptrdiff_t size = last_overlay_modification_hooks_used; |
38182d90 | 4280 | Lisp_Object *copy = alloca (size * sizeof *copy); |
d311d28c | 4281 | ptrdiff_t i; |
a615c6dc | 4282 | |
72af86bd | 4283 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
663e2b3f | 4284 | size * word_size); |
a615c6dc SM |
4285 | gcpro1.var = copy; |
4286 | gcpro1.nvars = size; | |
4287 | ||
4288 | for (i = 0; i < size;) | |
4289 | { | |
8f54f30a PE |
4290 | Lisp_Object prop_i, overlay_i; |
4291 | prop_i = copy[i++]; | |
4292 | overlay_i = copy[i++]; | |
4293 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4294 | } |
4295 | } | |
55b48893 | 4296 | UNGCPRO; |
173f2a64 RS |
4297 | } |
4298 | ||
4299 | static void | |
d3da34e0 JB |
4300 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4301 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4302 | { |
930a9140 | 4303 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4304 | |
930a9140 | 4305 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4306 | |
6d70a280 | 4307 | while (CONSP (list)) |
173f2a64 | 4308 | { |
930a9140 | 4309 | if (NILP (arg3)) |
6d70a280 | 4310 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4311 | else |
6d70a280 SM |
4312 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4313 | list = XCDR (list); | |
173f2a64 RS |
4314 | } |
4315 | UNGCPRO; | |
4316 | } | |
9d7608b7 KH |
4317 | |
4318 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4319 | property is set. */ | |
4320 | void | |
d311d28c | 4321 | evaporate_overlays (ptrdiff_t pos) |
9d7608b7 | 4322 | { |
2410d73a SM |
4323 | Lisp_Object overlay, hit_list; |
4324 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4325 | |
4326 | hit_list = Qnil; | |
c2d5b10f | 4327 | if (pos <= current_buffer->overlay_center) |
4cb3e6b3 | 4328 | for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next) |
9d7608b7 | 4329 | { |
d311d28c | 4330 | ptrdiff_t endpos; |
2410d73a | 4331 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4332 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4333 | if (endpos < pos) | |
4334 | break; | |
4335 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4336 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4337 | hit_list = Fcons (overlay, hit_list); |
4338 | } | |
4339 | else | |
4cb3e6b3 | 4340 | for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next) |
9d7608b7 | 4341 | { |
d311d28c | 4342 | ptrdiff_t startpos; |
2410d73a | 4343 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4344 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4345 | if (startpos > pos) | |
4346 | break; | |
4347 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4348 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4349 | hit_list = Fcons (overlay, hit_list); |
4350 | } | |
7539e11f KR |
4351 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4352 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4353 | } |
173f2a64 | 4354 | \f |
54dfdeb0 | 4355 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4356 | in the slot with offset OFFSET. */ |
4357 | ||
0fa3ba92 | 4358 | void |
d3da34e0 | 4359 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4360 | { |
ad97b375 | 4361 | Lisp_Object predicate; |
177c0ea7 | 4362 | |
64e16c3c | 4363 | switch (type) |
0fa3ba92 | 4364 | { |
2de9f71c | 4365 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4366 | case Lisp_String: predicate = Qstringp; break; |
4367 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4368 | default: abort (); | |
0fa3ba92 JB |
4369 | } |
4370 | ||
ad97b375 | 4371 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4372 | } |
7c02e886 | 4373 | |
0fa3ba92 | 4374 | \f |
b86af064 GM |
4375 | /*********************************************************************** |
4376 | Allocation with mmap | |
4377 | ***********************************************************************/ | |
4378 | ||
4379 | #ifdef USE_MMAP_FOR_BUFFERS | |
4380 | ||
4381 | #include <sys/types.h> | |
4382 | #include <sys/mman.h> | |
4383 | ||
4384 | #ifndef MAP_ANON | |
4385 | #ifdef MAP_ANONYMOUS | |
4386 | #define MAP_ANON MAP_ANONYMOUS | |
4387 | #else | |
4388 | #define MAP_ANON 0 | |
4389 | #endif | |
4390 | #endif | |
4391 | ||
09dfdf85 GM |
4392 | #ifndef MAP_FAILED |
4393 | #define MAP_FAILED ((void *) -1) | |
4394 | #endif | |
4395 | ||
b86af064 | 4396 | #include <stdio.h> |
b86af064 GM |
4397 | |
4398 | #if MAP_ANON == 0 | |
4399 | #include <fcntl.h> | |
4400 | #endif | |
4401 | ||
4402 | #include "coding.h" | |
4403 | ||
4404 | ||
4405 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4406 | The current implementation lets the system select mapped | |
4407 | addresses; we're not using MAP_FIXED in general, except when | |
4408 | trying to enlarge regions. | |
4409 | ||
4410 | Each mapped region starts with a mmap_region structure, the user | |
4411 | area starts after that structure, aligned to MEM_ALIGN. | |
4412 | ||
4413 | +-----------------------+ | |
4414 | | struct mmap_info + | | |
4415 | | padding | | |
4416 | +-----------------------+ | |
4417 | | user data | | |
4418 | | | | |
4419 | | | | |
4420 | +-----------------------+ */ | |
4421 | ||
4422 | struct mmap_region | |
4423 | { | |
4424 | /* User-specified size. */ | |
4425 | size_t nbytes_specified; | |
177c0ea7 | 4426 | |
b86af064 GM |
4427 | /* Number of bytes mapped */ |
4428 | size_t nbytes_mapped; | |
4429 | ||
4430 | /* Pointer to the location holding the address of the memory | |
4431 | allocated with the mmap'd block. The variable actually points | |
4432 | after this structure. */ | |
261cb4bb | 4433 | void **var; |
b86af064 GM |
4434 | |
4435 | /* Next and previous in list of all mmap'd regions. */ | |
4436 | struct mmap_region *next, *prev; | |
4437 | }; | |
4438 | ||
4439 | /* Doubly-linked list of mmap'd regions. */ | |
4440 | ||
4441 | static struct mmap_region *mmap_regions; | |
4442 | ||
4443 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4444 | /dev/zero will be opened on it. */ | |
4445 | ||
4446 | static int mmap_fd; | |
4447 | ||
4448 | /* Temporary storage for mmap_set_vars, see there. */ | |
4449 | ||
4450 | static struct mmap_region *mmap_regions_1; | |
4451 | static int mmap_fd_1; | |
4452 | ||
4453 | /* Page size on this system. */ | |
4454 | ||
4455 | static int mmap_page_size; | |
4456 | ||
cd1181db | 4457 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4458 | |
4459 | static int mmap_initialized_p; | |
4460 | ||
4461 | /* Value is X rounded up to the next multiple of N. */ | |
4462 | ||
4463 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4464 | ||
4465 | /* Size of mmap_region structure plus padding. */ | |
4466 | ||
4467 | #define MMAP_REGION_STRUCT_SIZE \ | |
4468 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4469 | ||
4470 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4471 | region, return a pointer to the start of the region. */ | |
4472 | ||
4473 | #define MMAP_REGION(P) \ | |
4474 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4475 | ||
4476 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4477 | to the start of the user-visible part of the region. */ | |
4478 | ||
4479 | #define MMAP_USER_AREA(P) \ | |
261cb4bb | 4480 | ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) |
b86af064 GM |
4481 | |
4482 | #define MEM_ALIGN sizeof (double) | |
4483 | ||
7273faa1 DL |
4484 | /* Predicate returning true if part of the address range [START .. END] |
4485 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4486 | memory mapping. |
4487 | ||
da6062e6 | 4488 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4489 | something else. This can be overridden by system configuration |
4490 | files if system-specific means to determine this exists. */ | |
4491 | ||
4492 | #ifndef MMAP_ALLOCATED_P | |
4493 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4494 | #endif | |
4495 | ||
53964682 | 4496 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4497 | |
1dae0f0a AS |
4498 | static void |
4499 | mmap_init (void) | |
4500 | { | |
4501 | #if MAP_ANON == 0 | |
4502 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4503 | in a dumped Emacs. */ | |
4504 | if (mmap_fd <= 0) | |
4505 | { | |
4506 | /* No anonymous mmap -- we need the file descriptor. */ | |
4507 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4508 | if (mmap_fd == -1) | |
4509 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4510 | } | |
4511 | #endif /* MAP_ANON == 0 */ | |
4512 | ||
4513 | if (mmap_initialized_p) | |
4514 | return; | |
4515 | mmap_initialized_p = 1; | |
b86af064 | 4516 | |
1dae0f0a AS |
4517 | #if MAP_ANON != 0 |
4518 | mmap_fd = -1; | |
4519 | #endif | |
4520 | ||
4521 | mmap_page_size = getpagesize (); | |
4522 | } | |
b86af064 GM |
4523 | |
4524 | /* Return a region overlapping address range START...END, or null if | |
4525 | none. END is not including, i.e. the last byte in the range | |
4526 | is at END - 1. */ | |
4527 | ||
4528 | static struct mmap_region * | |
261cb4bb | 4529 | mmap_find (void *start, void *end) |
b86af064 GM |
4530 | { |
4531 | struct mmap_region *r; | |
4532 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4533 | |
b86af064 GM |
4534 | for (r = mmap_regions; r; r = r->next) |
4535 | { | |
4536 | char *rstart = (char *) r; | |
4537 | char *rend = rstart + r->nbytes_mapped; | |
4538 | ||
4539 | if (/* First byte of range, i.e. START, in this region? */ | |
4540 | (s >= rstart && s < rend) | |
4541 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4542 | || (e > rstart && e <= rend) | |
4543 | /* First byte of this region in the range? */ | |
4544 | || (rstart >= s && rstart < e) | |
4545 | /* Last byte of this region in the range? */ | |
4546 | || (rend > s && rend <= e)) | |
4547 | break; | |
4548 | } | |
4549 | ||
4550 | return r; | |
4551 | } | |
4552 | ||
4553 | ||
4554 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4555 | the region. Value is non-zero if successful. */ | |
4556 | ||
4557 | static int | |
1dae0f0a | 4558 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4559 | { |
4560 | if (r->next) | |
4561 | r->next->prev = r->prev; | |
4562 | if (r->prev) | |
4563 | r->prev->next = r->next; | |
4564 | else | |
4565 | mmap_regions = r->next; | |
177c0ea7 | 4566 | |
261cb4bb | 4567 | if (munmap (r, r->nbytes_mapped) == -1) |
b86af064 GM |
4568 | { |
4569 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4570 | return 0; | |
4571 | } | |
4572 | ||
4573 | return 1; | |
4574 | } | |
4575 | ||
4576 | ||
4577 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4578 | Value is non-zero if successful. */ | |
4579 | ||
4580 | static int | |
1dae0f0a | 4581 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4582 | { |
4583 | char *region_end = (char *) r + r->nbytes_mapped; | |
4584 | size_t nbytes; | |
4585 | int success = 0; | |
4586 | ||
4587 | if (npages < 0) | |
4588 | { | |
4589 | /* Unmap pages at the end of the region. */ | |
4590 | nbytes = - npages * mmap_page_size; | |
4591 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4592 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4593 | else | |
4594 | { | |
4595 | r->nbytes_mapped -= nbytes; | |
4596 | success = 1; | |
4597 | } | |
4598 | } | |
4599 | else if (npages > 0) | |
4600 | { | |
b86af064 | 4601 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4602 | |
b86af064 GM |
4603 | /* Try to map additional pages at the end of the region. We |
4604 | cannot do this if the address range is already occupied by | |
4605 | something else because mmap deletes any previous mapping. | |
4606 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4607 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 | 4608 | { |
261cb4bb | 4609 | void *p; |
177c0ea7 | 4610 | |
b86af064 GM |
4611 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4612 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4613 | if (p == MAP_FAILED) | |
edaa9aed | 4614 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
261cb4bb | 4615 | else if (p != region_end) |
b86af064 GM |
4616 | { |
4617 | /* Kernels are free to choose a different address. In | |
4618 | that case, unmap what we've mapped above; we have | |
4619 | no use for it. */ | |
4620 | if (munmap (p, nbytes) == -1) | |
4621 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4622 | } | |
4623 | else | |
4624 | { | |
4625 | r->nbytes_mapped += nbytes; | |
4626 | success = 1; | |
4627 | } | |
4628 | } | |
4629 | } | |
4630 | ||
4631 | return success; | |
4632 | } | |
4633 | ||
4634 | ||
4635 | /* Set or reset variables holding references to mapped regions. If | |
4636 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4637 | non-zero, set all variables to the start of the user-areas | |
4638 | of mapped regions. | |
4639 | ||
4640 | This function is called from Fdump_emacs to ensure that the dumped | |
4641 | Emacs doesn't contain references to memory that won't be mapped | |
4642 | when Emacs starts. */ | |
4643 | ||
4644 | void | |
1dae0f0a | 4645 | mmap_set_vars (int restore_p) |
b86af064 GM |
4646 | { |
4647 | struct mmap_region *r; | |
4648 | ||
4649 | if (restore_p) | |
4650 | { | |
4651 | mmap_regions = mmap_regions_1; | |
4652 | mmap_fd = mmap_fd_1; | |
4653 | for (r = mmap_regions; r; r = r->next) | |
4654 | *r->var = MMAP_USER_AREA (r); | |
4655 | } | |
4656 | else | |
4657 | { | |
4658 | for (r = mmap_regions; r; r = r->next) | |
4659 | *r->var = NULL; | |
4660 | mmap_regions_1 = mmap_regions; | |
4661 | mmap_regions = NULL; | |
4662 | mmap_fd_1 = mmap_fd; | |
4663 | mmap_fd = -1; | |
4664 | } | |
4665 | } | |
4666 | ||
4667 | ||
4668 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4669 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4670 | address of some variable which will use the data area. | |
4671 | ||
4672 | The allocation of 0 bytes is valid. | |
4673 | ||
4674 | If we can't allocate the necessary memory, set *VAR to null, and | |
4675 | return null. */ | |
4676 | ||
261cb4bb PE |
4677 | static void * |
4678 | mmap_alloc (void **var, size_t nbytes) | |
b86af064 GM |
4679 | { |
4680 | void *p; | |
4681 | size_t map; | |
4682 | ||
4683 | mmap_init (); | |
4684 | ||
4685 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4686 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4687 | mmap_fd, 0); | |
177c0ea7 | 4688 | |
b86af064 GM |
4689 | if (p == MAP_FAILED) |
4690 | { | |
4691 | if (errno != ENOMEM) | |
4692 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4693 | p = NULL; | |
4694 | } | |
4695 | else | |
4696 | { | |
4697 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4698 | |
b86af064 GM |
4699 | r->nbytes_specified = nbytes; |
4700 | r->nbytes_mapped = map; | |
4701 | r->var = var; | |
4702 | r->prev = NULL; | |
4703 | r->next = mmap_regions; | |
4704 | if (r->next) | |
4705 | r->next->prev = r; | |
4706 | mmap_regions = r; | |
177c0ea7 | 4707 | |
b86af064 GM |
4708 | p = MMAP_USER_AREA (p); |
4709 | } | |
177c0ea7 | 4710 | |
b86af064 GM |
4711 | return *var = p; |
4712 | } | |
4713 | ||
4714 | ||
1dae0f0a AS |
4715 | /* Free a block of relocatable storage whose data is pointed to by |
4716 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4717 | ||
4718 | static void | |
261cb4bb | 4719 | mmap_free (void **var) |
1dae0f0a AS |
4720 | { |
4721 | mmap_init (); | |
4722 | ||
4723 | if (*var) | |
4724 | { | |
4725 | mmap_free_1 (MMAP_REGION (*var)); | |
4726 | *var = NULL; | |
4727 | } | |
4728 | } | |
4729 | ||
4730 | ||
b86af064 GM |
4731 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4732 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4733 | and return this value. If more memory cannot be allocated, then | |
4734 | leave *VAR unchanged, and return null. */ | |
4735 | ||
261cb4bb PE |
4736 | static void * |
4737 | mmap_realloc (void **var, size_t nbytes) | |
b86af064 | 4738 | { |
261cb4bb | 4739 | void *result; |
177c0ea7 | 4740 | |
b86af064 GM |
4741 | mmap_init (); |
4742 | ||
4743 | if (*var == NULL) | |
4744 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4745 | else if (nbytes == 0) |
b86af064 GM |
4746 | { |
4747 | mmap_free (var); | |
4748 | result = mmap_alloc (var, nbytes); | |
4749 | } | |
4750 | else | |
4751 | { | |
4752 | struct mmap_region *r = MMAP_REGION (*var); | |
4753 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4754 | |
b86af064 GM |
4755 | if (room < nbytes) |
4756 | { | |
4757 | /* Must enlarge. */ | |
261cb4bb | 4758 | void *old_ptr = *var; |
b86af064 GM |
4759 | |
4760 | /* Try to map additional pages at the end of the region. | |
4761 | If that fails, allocate a new region, copy data | |
4762 | from the old region, then free it. */ | |
4763 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4764 | / mmap_page_size))) | |
4765 | { | |
4766 | r->nbytes_specified = nbytes; | |
4767 | *var = result = old_ptr; | |
4768 | } | |
4769 | else if (mmap_alloc (var, nbytes)) | |
4770 | { | |
72af86bd | 4771 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4772 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4773 | result = *var; | |
4774 | r = MMAP_REGION (result); | |
4775 | r->nbytes_specified = nbytes; | |
4776 | } | |
4777 | else | |
4778 | { | |
4779 | *var = old_ptr; | |
4780 | result = NULL; | |
4781 | } | |
4782 | } | |
4783 | else if (room - nbytes >= mmap_page_size) | |
4784 | { | |
4785 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4786 | memory back to the system. |
4787 | ||
4788 | The extra parens are to make the division happens first, | |
4789 | on positive values, so we know it will round towards | |
4790 | zero. */ | |
bb63c5c9 | 4791 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4792 | result = *var; |
4793 | r->nbytes_specified = nbytes; | |
4794 | } | |
4795 | else | |
4796 | { | |
4797 | /* Leave it alone. */ | |
4798 | result = *var; | |
4799 | r->nbytes_specified = nbytes; | |
4800 | } | |
4801 | } | |
4802 | ||
4803 | return result; | |
4804 | } | |
4805 | ||
4806 | ||
b86af064 GM |
4807 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4808 | ||
4809 | ||
4810 | \f | |
4811 | /*********************************************************************** | |
4812 | Buffer-text Allocation | |
4813 | ***********************************************************************/ | |
4814 | ||
b86af064 GM |
4815 | /* Allocate NBYTES bytes for buffer B's text buffer. */ |
4816 | ||
4817 | static void | |
fd05c7e9 | 4818 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 | 4819 | { |
261cb4bb | 4820 | void *p; |
177c0ea7 | 4821 | |
b86af064 GM |
4822 | BLOCK_INPUT; |
4823 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4824 | p = mmap_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4825 | #elif defined REL_ALLOC |
261cb4bb | 4826 | p = r_alloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4827 | #else |
815add84 | 4828 | p = xmalloc (nbytes); |
b86af064 | 4829 | #endif |
177c0ea7 | 4830 | |
b86af064 GM |
4831 | if (p == NULL) |
4832 | { | |
4833 | UNBLOCK_INPUT; | |
531b0165 | 4834 | memory_full (nbytes); |
b86af064 GM |
4835 | } |
4836 | ||
4837 | b->text->beg = (unsigned char *) p; | |
4838 | UNBLOCK_INPUT; | |
4839 | } | |
4840 | ||
4841 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4842 | shrink it. */ | |
4843 | ||
4844 | void | |
d311d28c | 4845 | enlarge_buffer_text (struct buffer *b, ptrdiff_t delta) |
b86af064 | 4846 | { |
261cb4bb | 4847 | void *p; |
fd05c7e9 PE |
4848 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4849 | + delta); | |
b86af064 GM |
4850 | BLOCK_INPUT; |
4851 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4852 | p = mmap_realloc ((void **) &b->text->beg, nbytes); |
b86af064 | 4853 | #elif defined REL_ALLOC |
261cb4bb | 4854 | p = r_re_alloc ((void **) &b->text->beg, nbytes); |
b86af064 GM |
4855 | #else |
4856 | p = xrealloc (b->text->beg, nbytes); | |
4857 | #endif | |
177c0ea7 | 4858 | |
b86af064 GM |
4859 | if (p == NULL) |
4860 | { | |
4861 | UNBLOCK_INPUT; | |
531b0165 | 4862 | memory_full (nbytes); |
b86af064 GM |
4863 | } |
4864 | ||
4865 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4866 | UNBLOCK_INPUT; | |
4867 | } | |
4868 | ||
4869 | ||
4870 | /* Free buffer B's text buffer. */ | |
4871 | ||
4872 | static void | |
d3da34e0 | 4873 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4874 | { |
4875 | BLOCK_INPUT; | |
4876 | ||
4877 | #if defined USE_MMAP_FOR_BUFFERS | |
261cb4bb | 4878 | mmap_free ((void **) &b->text->beg); |
b86af064 | 4879 | #elif defined REL_ALLOC |
261cb4bb | 4880 | r_alloc_free ((void **) &b->text->beg); |
b86af064 GM |
4881 | #else |
4882 | xfree (b->text->beg); | |
4883 | #endif | |
177c0ea7 | 4884 | |
b86af064 GM |
4885 | BUF_BEG_ADDR (b) = NULL; |
4886 | UNBLOCK_INPUT; | |
4887 | } | |
4888 | ||
4889 | ||
4890 | \f | |
4891 | /*********************************************************************** | |
4892 | Initialization | |
4893 | ***********************************************************************/ | |
4894 | ||
dfcf069d | 4895 | void |
d3da34e0 | 4896 | init_buffer_once (void) |
1ab256cb | 4897 | { |
7c02e886 | 4898 | int idx; |
3884d954 DA |
4899 | /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make |
4900 | sure that this is still correct. Otherwise, mark_vectorlike may not | |
4901 | trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */ | |
38182d90 | 4902 | const int pvecsize |
663e2b3f | 4903 | = (offsetof (struct buffer, own_text) - header_size) / word_size; |
7c02e886 | 4904 | |
72af86bd | 4905 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4906 | |
1ab256cb RM |
4907 | /* Make sure all markable slots in buffer_defaults |
4908 | are initialized reasonably, so mark_buffer won't choke. */ | |
4909 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4910 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4911 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4912 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4913 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4914 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4915 | /* Prevent GC from getting confused. */ |
4916 | buffer_defaults.text = &buffer_defaults.own_text; | |
4917 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
04e9897c DA |
4918 | /* No one will share the text with these buffers, but let's play it safe. */ |
4919 | buffer_defaults.indirections = 0; | |
4920 | buffer_local_symbols.indirections = 0; | |
8707c1e5 DA |
4921 | buffer_set_intervals (&buffer_defaults, NULL); |
4922 | buffer_set_intervals (&buffer_local_symbols, NULL); | |
3884d954 | 4923 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, pvecsize); |
67180c6a | 4924 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
3884d954 | 4925 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, pvecsize); |
67180c6a | 4926 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4927 | |
4928 | /* Set up the default values of various buffer slots. */ | |
4929 | /* Must do these before making the first buffer! */ | |
4930 | ||
f532dca0 | 4931 | /* real setup is done in bindings.el */ |
2a0213a6 | 4932 | BVAR (&buffer_defaults, mode_line_format) = build_pure_c_string ("%-"); |
4b4deea2 TT |
4933 | BVAR (&buffer_defaults, header_line_format) = Qnil; |
4934 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4935 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4936 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4937 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4938 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
4b4deea2 | 4939 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
4b4deea2 TT |
4940 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4941 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4942 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4943 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4944 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4945 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4946 | buffer_defaults.overlays_before = NULL; |
4947 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4948 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4949 | |
4b4deea2 TT |
4950 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4951 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4952 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4953 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4cc60b9b | 4954 | BVAR (&buffer_defaults, bidi_display_reordering) = Qt; |
4b4deea2 TT |
4955 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; |
4956 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4957 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4958 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4959 | |
4b4deea2 TT |
4960 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4961 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4962 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4963 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4964 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4965 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4966 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4967 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4968 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4969 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4970 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4971 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4972 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4973 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4974 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4975 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4976 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4977 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4978 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4979 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4980 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4981 | |
4982 | /* Assign the local-flags to the slots that have default values. | |
4983 | The local flag is a bit that is used in the buffer | |
4984 | to say that it has its own local value for the slot. | |
4985 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4986 | ||
4987 | /* Nothing can work if this isn't true */ | |
663e2b3f | 4988 | { verify (sizeof (EMACS_INT) == word_size); } |
1ab256cb RM |
4989 | |
4990 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4991 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4992 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4993 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4994 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4995 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4996 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4997 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4998 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4999 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
5000 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
5001 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
5002 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
5003 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
5004 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
5005 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
5006 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
5007 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
5008 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
5009 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 5010 | |
7c02e886 | 5011 | idx = 1; |
4b4deea2 TT |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5014 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5016 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5017 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
4b4deea2 | 5018 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
4b4deea2 TT |
5019 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5020 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5021 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5022 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5023 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5024 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5025 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5026 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5027 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5028 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5029 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5030 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5031 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5032 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5033 | /* Make this one a permanent local. */ |
7c02e886 | 5034 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5035 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5036 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5037 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5038 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5039 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5040 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5041 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5042 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5043 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5044 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5045 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5046 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5047 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5048 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5049 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5050 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5051 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5052 | |
5053 | /* Need more room? */ | |
7313acd0 | 5054 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5055 | abort (); |
7313acd0 | 5056 | last_per_buffer_idx = idx; |
177c0ea7 | 5057 | |
1ab256cb RM |
5058 | Vbuffer_alist = Qnil; |
5059 | current_buffer = 0; | |
5060 | all_buffers = 0; | |
5061 | ||
2a0213a6 | 5062 | QSFundamental = build_pure_c_string ("Fundamental"); |
1ab256cb | 5063 | |
d67b4f80 | 5064 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5065 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5066 | |
d67b4f80 | 5067 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5068 | |
d67b4f80 | 5069 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5070 | |
d67b4f80 | 5071 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5072 | |
d67b4f80 | 5073 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5074 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5075 | |
1ab256cb | 5076 | /* super-magic invisible buffer */ |
2a0213a6 | 5077 | Vprin1_to_string_buffer = Fget_buffer_create (build_pure_c_string (" prin1")); |
1ab256cb RM |
5078 | Vbuffer_alist = Qnil; |
5079 | ||
2a0213a6 | 5080 | Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*"))); |
7775635d KH |
5081 | |
5082 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5083 | } |
5084 | ||
dfcf069d | 5085 | void |
d3da34e0 | 5086 | init_buffer (void) |
1ab256cb | 5087 | { |
2381d133 | 5088 | char *pwd; |
136351b7 | 5089 | Lisp_Object temp; |
965d34eb | 5090 | ptrdiff_t len; |
1ab256cb | 5091 | |
b86af064 | 5092 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5093 | { |
5094 | /* When using the ralloc implementation based on mmap(2), buffer | |
5095 | text pointers will have been set to null in the dumped Emacs. | |
5096 | Map new memory. */ | |
5097 | struct buffer *b; | |
177c0ea7 | 5098 | |
52b852c7 | 5099 | FOR_EACH_BUFFER (b) |
93c27ef1 | 5100 | if (b->text->beg == NULL) |
b86af064 | 5101 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5102 | } |
b86af064 | 5103 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5104 | |
1ab256cb | 5105 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5106 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5107 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5108 | |
01537133 | 5109 | pwd = get_current_dir_name (); |
a17b5ed1 | 5110 | |
156bdb41 | 5111 | if (!pwd) |
a17b5ed1 | 5112 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5113 | |
1ab256cb RM |
5114 | /* Maybe this should really use some standard subroutine |
5115 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5116 | len = strlen (pwd); |
5117 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5118 | { |
156bdb41 | 5119 | /* Grow buffer to add directory separator and '\0'. */ |
38182d90 | 5120 | pwd = realloc (pwd, len + 2); |
8b146312 AS |
5121 | if (!pwd) |
5122 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5123 | pwd[len] = DIRECTORY_SEP; |
5124 | pwd[len + 1] = '\0'; | |
cb1caeaf | 5125 | len++; |
f7975d07 | 5126 | } |
0995fa35 | 5127 | |
cb1caeaf | 5128 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, len); |
4b4deea2 | 5129 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
f9962371 | 5130 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5131 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5132 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5133 | BVAR (current_buffer, directory) |
5134 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5135 | |
0995fa35 RS |
5136 | /* Add /: to the front of the name |
5137 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5138 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5139 | if (! NILP (temp) |
5140 | /* If the default dir is just /, TEMP is non-nil | |
5141 | because of the ange-ftp completion handler. | |
5142 | However, it is not necessary to turn / into /:/. | |
5143 | So avoid doing that. */ | |
4b4deea2 TT |
5144 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5145 | BVAR (current_buffer, directory) | |
5146 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5147 | |
136351b7 | 5148 | temp = get_minibuffer (0); |
4b4deea2 | 5149 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5150 | |
5151 | free (pwd); | |
1ab256cb RM |
5152 | } |
5153 | ||
d6aa1876 SM |
5154 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5155 | Object stored in the current buffer. address is the address of the slot | |
5156 | in the buffer that is current now. */ | |
5157 | ||
5158 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5159 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5160 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5161 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5162 | VNAME is the name of the buffer slot. |
5163 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5164 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5165 | do { \ | |
5166 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5167 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5168 | } while (0) |
d6aa1876 SM |
5169 | |
5170 | static void | |
8ea90aa3 | 5171 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5172 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5173 | { |
ce5b453a | 5174 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5175 | int offset; |
5176 | ||
ce5b453a | 5177 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5178 | offset = (char *)address - (char *)current_buffer; |
5179 | ||
ce5b453a SM |
5180 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5181 | bo_fwd->offset = offset; | |
5182 | bo_fwd->slottype = type; | |
b9598260 | 5183 | sym->declared_special = 1; |
ce5b453a SM |
5184 | sym->redirect = SYMBOL_FORWARDED; |
5185 | { | |
5186 | /* I tried to do the job without a cast, but it seems impossible. | |
5187 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5188 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5189 | } | |
5190 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5191 | |
5192 | if (PER_BUFFER_IDX (offset) == 0) | |
5193 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5194 | slot of buffer_local_flags */ | |
5195 | abort (); | |
5196 | } | |
5197 | ||
5198 | ||
1ab256cb | 5199 | /* initialize the buffer routines */ |
dfcf069d | 5200 | void |
d3da34e0 | 5201 | syms_of_buffer (void) |
1ab256cb | 5202 | { |
9115729e KH |
5203 | staticpro (&last_overlay_modification_hooks); |
5204 | last_overlay_modification_hooks | |
5205 | = Fmake_vector (make_number (10), Qnil); | |
5206 | ||
1ab256cb RM |
5207 | staticpro (&Vbuffer_defaults); |
5208 | staticpro (&Vbuffer_local_symbols); | |
5209 | staticpro (&Qfundamental_mode); | |
5210 | staticpro (&Qmode_class); | |
5211 | staticpro (&QSFundamental); | |
5212 | staticpro (&Vbuffer_alist); | |
5213 | staticpro (&Qprotected_field); | |
5214 | staticpro (&Qpermanent_local); | |
5215 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5216 | |
5217 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5218 | DEFSYM (Qoverlayp, "overlayp"); | |
5219 | DEFSYM (Qevaporate, "evaporate"); | |
5220 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5221 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5222 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5223 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5224 | DEFSYM (Qpriority, "priority"); | |
5225 | DEFSYM (Qbefore_string, "before-string"); | |
5226 | DEFSYM (Qafter_string, "after-string"); | |
5227 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5228 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5229 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5230 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5231 | ||
1ab256cb | 5232 | Fput (Qprotected_field, Qerror_conditions, |
3438fe21 | 5233 | listn (CONSTYPE_PURE, 2, Qprotected_field, Qerror)); |
1ab256cb | 5234 | Fput (Qprotected_field, Qerror_message, |
2a0213a6 | 5235 | build_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5236 | |
422745d0 TT |
5237 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5238 | mode_line_format, | |
5239 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5240 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5241 | |
422745d0 TT |
5242 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5243 | header_line_format, | |
5244 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5245 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5246 | |
422745d0 TT |
5247 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5248 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5249 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5250 | |
422745d0 TT |
5251 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5252 | extra_line_spacing, | |
5253 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5254 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5255 | |
422745d0 TT |
5256 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5257 | cursor_in_non_selected_windows, | |
5258 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5259 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5260 | ||
422745d0 TT |
5261 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5262 | abbrev_mode, | |
5263 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5264 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5265 | |
422745d0 TT |
5266 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5267 | ctl_arrow, | |
5268 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5269 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5270 | |
422745d0 TT |
5271 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5272 | enable_multibyte_characters, | |
fb7ada5f | 5273 | doc: /* Default value of `enable-multibyte-characters' for buffers not overriding it. |
018ba359 | 5274 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5275 | |
422745d0 TT |
5276 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5277 | buffer_file_coding_system, | |
5278 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5279 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5280 | |
422745d0 TT |
5281 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5282 | truncate_lines, | |
5283 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5284 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5285 | |
422745d0 TT |
5286 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5287 | fill_column, | |
5288 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5289 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5290 | |
422745d0 TT |
5291 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5292 | left_margin, | |
5293 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5294 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5295 | |
422745d0 TT |
5296 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5297 | tab_width, | |
5298 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5299 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5300 | |
422745d0 TT |
5301 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5302 | case_fold_search, | |
5303 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5304 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5305 | |
422745d0 TT |
5306 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5307 | left_margin_cols, | |
5308 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5309 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5310 | |
422745d0 TT |
5311 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5312 | right_margin_cols, | |
5313 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5314 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5315 | |
422745d0 TT |
5316 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5317 | left_fringe_width, | |
5318 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5319 | This is the same as (default-value 'left-fringe-width). */); |
5320 | ||
422745d0 TT |
5321 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5322 | right_fringe_width, | |
5323 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5324 | This is the same as (default-value 'right-fringe-width). */); |
5325 | ||
422745d0 TT |
5326 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5327 | fringes_outside_margins, | |
5328 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5329 | This is the same as (default-value 'fringes-outside-margins). */); |
5330 | ||
422745d0 TT |
5331 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5332 | scroll_bar_width, | |
5333 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5334 | This is the same as (default-value 'scroll-bar-width). */); |
5335 | ||
422745d0 TT |
5336 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5337 | vertical_scroll_bar_type, | |
5338 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5339 | This is the same as (default-value 'vertical-scroll-bar). */); |
5340 | ||
422745d0 TT |
5341 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5342 | indicate_empty_lines, | |
5343 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5344 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5345 | |
422745d0 TT |
5346 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5347 | indicate_buffer_boundaries, | |
5348 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5349 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5350 | ||
422745d0 TT |
5351 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5352 | fringe_indicator_alist, | |
5353 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5354 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5355 | ||
422745d0 TT |
5356 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5357 | fringe_cursor_alist, | |
5358 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5359 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5360 | ||
422745d0 TT |
5361 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5362 | scroll_up_aggressively, | |
5363 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5364 | This value applies in buffers that don't have their own local values. |
fc961256 | 5365 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5366 | |
422745d0 TT |
5367 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5368 | scroll_down_aggressively, | |
5369 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5370 | This value applies in buffers that don't have their own local values. |
fc961256 | 5371 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5372 | |
045dee35 | 5373 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5374 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5375 | Qnil, |
7614d762 RS |
5376 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5377 | The header line appears, optionally, at the top of a window; | |
5378 | the mode line appears at the bottom. */); | |
177c0ea7 | 5379 | |
4b4deea2 | 5380 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5381 | Qnil, |
5382 | doc: /* Template for displaying mode line for current buffer. | |
5f2c76c6 CY |
5383 | |
5384 | The value may be nil, a string, a symbol or a list. | |
5385 | ||
018ba359 | 5386 | A value of nil means don't display a mode line. |
5f2c76c6 CY |
5387 | |
5388 | For any symbol other than t or nil, the symbol's value is processed as | |
5389 | a mode line construct. As a special exception, if that value is a | |
5390 | string, the string is processed verbatim, without handling any | |
5391 | %-constructs (see below). Also, unless the symbol has a non-nil | |
5392 | `risky-local-variable' property, all properties in any strings, as | |
5393 | well as all :eval and :propertize forms in the value, are ignored. | |
5394 | ||
5395 | A list whose car is a string or list is processed by processing each | |
5396 | of the list elements recursively, as separate mode line constructs, | |
5397 | and concatenating the results. | |
5398 | ||
5399 | A list of the form `(:eval FORM)' is processed by evaluating FORM and | |
5400 | using the result as a mode line construct. Be careful--FORM should | |
5401 | not load any files, because that can cause an infinite recursion. | |
5402 | ||
5403 | A list of the form `(:propertize ELT PROPS...)' is processed by | |
5404 | processing ELT as the mode line construct, and adding the text | |
5405 | properties PROPS to the result. | |
5406 | ||
5407 | A list whose car is a symbol is processed by examining the symbol's | |
5408 | value, and, if that value is non-nil, processing the cadr of the list | |
5409 | recursively; and if that value is nil, processing the caddr of the | |
5410 | list recursively. | |
5411 | ||
5412 | A list whose car is an integer is processed by processing the cadr of | |
5413 | the list, and padding (if the number is positive) or truncating (if | |
5414 | negative) to the width specified by that number. | |
5415 | ||
018ba359 | 5416 | A string is printed verbatim in the mode line except for %-constructs: |
018ba359 PJ |
5417 | %b -- print buffer name. %f -- print visited file name. |
5418 | %F -- print frame name. | |
5419 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5420 | %& is like %*, but ignore read-only-ness. | |
5421 | % means buffer is read-only and * means it is modified. | |
5422 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5423 | %s -- print process status. %l -- print the current line number. | |
5424 | %c -- print the current column number (this makes editing slower). | |
5425 | To make the column number update correctly in all cases, | |
5426 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5427 | %i -- print the size of the buffer. |
5428 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5429 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5430 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5431 | or print Bottom or All. | |
018ba359 | 5432 | %n -- print Narrow if appropriate. |
dafbe726 | 5433 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5434 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5435 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5436 | %e -- print error message about full memory. |
f7165034 NR |
5437 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5438 | remote machine. | |
018ba359 PJ |
5439 | %[ -- print one [ for each recursive editing level. %] similar. |
5440 | %% -- print %. %- -- print infinitely many dashes. | |
5441 | Decimal digits after the % specify field width to which to pad. */); | |
5442 | ||
422745d0 | 5443 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
fb7ada5f | 5444 | doc: /* Value of `major-mode' for new buffers. */); |
1ab256cb | 5445 | |
4b4deea2 | 5446 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5447 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5448 | doc: /* Symbol for current buffer's major mode. |
5449 | The default value (normally `fundamental-mode') affects new buffers. | |
5450 | A value of nil means to use the current buffer's major mode, provided | |
5451 | it is not marked as "special". | |
5452 | ||
5453 | When a mode is used by default, `find-file' switches to it before it | |
5454 | reads the contents into the buffer and before it finishes setting up | |
5455 | the buffer. Thus, the mode and its hooks should not expect certain | |
5456 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5457 | to be set up. */); | |
1ab256cb | 5458 | |
4b4deea2 | 5459 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5460 | Qnil, |
64a7c220 | 5461 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5462 | Usually a string, but can use any of the constructs for `mode-line-format', |
5463 | which see. | |
5464 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5465 | |
4b4deea2 | 5466 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5467 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5468 | ||
4b4deea2 | 5469 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5470 | doc: /* Non-nil if Abbrev mode is enabled. |
5471 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5472 | |
4b4deea2 | 5473 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5474 | Qnil, |
fb7ada5f | 5475 | doc: /* Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5476 | |
4b4deea2 | 5477 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
d5040d2d | 5478 | make_number (Lisp_Int0), |
fb7ada5f | 5479 | doc: /* Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5480 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5481 | |
4b4deea2 | 5482 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
d5040d2d | 5483 | make_number (Lisp_Int0), |
fb7ada5f | 5484 | doc: /* Column for the default `indent-line-function' to indent to. |
018ba359 | 5485 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5486 | |
4b4deea2 | 5487 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
d5040d2d | 5488 | make_number (Lisp_Int0), |
fb7ada5f | 5489 | doc: /* Distance between tab stops (for display of tab characters), in columns. |
fde4eb86 | 5490 | This should be an integer greater than zero. */); |
1ab256cb | 5491 | |
4b4deea2 | 5492 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
fb7ada5f | 5493 | doc: /* Non-nil means display control chars with uparrow. |
018ba359 PJ |
5494 | A value of nil means use backslash and octal digits. |
5495 | This variable does not apply to characters whose display is specified | |
5496 | in the current display table (if there is one). */); | |
1ab256cb | 5497 | |
3b06f880 | 5498 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5499 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5500 | Qnil, |
efc7e75f | 5501 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5502 | Otherwise they are regarded as unibyte. This affects the display, |
5503 | file I/O and the behavior of various editing commands. | |
5504 | ||
5505 | This variable is buffer-local but you cannot set it directly; | |
5506 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5507 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5508 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5509 | |
c71b5d9b | 5510 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5511 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5512 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5513 | This variable applies to saving the buffer, and also to `write-region' |
5514 | and other functions that use `write-region'. | |
5515 | It does not apply to sending output to subprocesses, however. | |
5516 | ||
5517 | If this is nil, the buffer is saved without any code conversion | |
5518 | unless some coding system is specified in `file-coding-system-alist' | |
5519 | for the buffer file. | |
5520 | ||
31a6cb06 EZ |
5521 | If the text to be saved cannot be encoded as specified by this variable, |
5522 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5523 | ||
018ba359 PJ |
5524 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5525 | ||
5526 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5527 | |
f44e260c | 5528 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5529 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5530 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5531 | |
6c0cf218 | 5532 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5533 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
fb7ada5f | 5534 | doc: /* If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5535 | |
b44d9321 EZ |
5536 | If this is nil (the default), the direction of each paragraph is |
5537 | determined by the first strong directional character of its text. | |
5538 | The values of `right-to-left' and `left-to-right' override that. | |
5539 | Any other value is treated as nil. | |
b4bf28b7 | 5540 | |
b44d9321 EZ |
5541 | This variable has no effect unless the buffer's value of |
5542 | \`bidi-display-reordering' is non-nil. */); | |
5543 | ||
4b4deea2 | 5544 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
fb7ada5f | 5545 | doc: /* Non-nil means do not display continuation lines. |
7614d762 | 5546 | Instead, give each line of text just one screen line. |
018ba359 PJ |
5547 | |
5548 | Note that this is overridden by the variable | |
5549 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5550 | and this buffer is not full-frame width. |
5551 | ||
5552 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5553 | |
4b4deea2 | 5554 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
fb7ada5f | 5555 | doc: /* Non-nil means to use word-wrapping for continuation lines. |
0858cd02 CY |
5556 | When word-wrapping is on, continuation lines are wrapped at the space |
5557 | or tab character nearest to the right window edge. | |
5558 | If nil, continuation lines are wrapped at the right screen edge. | |
5559 | ||
5560 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5561 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5562 | word-wrapping, you might want to reduce the value of | |
5563 | `truncate-partial-width-windows', since wrapping can make text readable | |
c5cfcbe0 CY |
5564 | in narrower windows. |
5565 | ||
5566 | Instead of setting this variable directly, most users should use | |
5567 | Visual Line mode . Visual Line mode, when enabled, sets `word-wrap' | |
5568 | to t, and additionally redefines simple editing commands to act on | |
5569 | visual lines rather than logical lines. See the documentation of | |
5570 | `visual-line-mode'. */); | |
0858cd02 | 5571 | |
4b4deea2 | 5572 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5573 | make_number (Lisp_String), |
efc7e75f | 5574 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5575 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5576 | |
4b4deea2 | 5577 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5578 | Qnil, |
efc7e75f | 5579 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5580 | It is called after self-inserting any character specified in |
5581 | the `auto-fill-chars' table. | |
5582 | NOTE: This variable is not a hook; | |
5583 | its value may not be a list of functions. */); | |
1ab256cb | 5584 | |
4b4deea2 | 5585 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5586 | make_number (Lisp_String), |
efc7e75f | 5587 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5588 | |
4b4deea2 | 5589 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5590 | make_number (Lisp_String), |
efc7e75f | 5591 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5592 | The truename of a file is calculated by `file-truename' |
5593 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5594 | |
1ab256cb | 5595 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5596 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5597 | make_number (Lisp_String), |
7614d762 RS |
5598 | doc: /* Name of file for auto-saving current buffer. |
5599 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5600 | |
4b4deea2 | 5601 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5602 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5603 | |
4b4deea2 | 5604 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5605 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5606 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5607 | |
4b4deea2 | 5608 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
d5040d2d | 5609 | make_number (Lisp_Int0), |
efc7e75f | 5610 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5611 | 0 initially. |
5612 | -1 means auto-saving turned off until next real save. | |
5613 | ||
5614 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5615 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5616 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5617 | |
4b4deea2 | 5618 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5619 | Qnil, |
7614d762 | 5620 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5621 | An integer N as value means display only lines |
5622 | that start with less than N columns of space. | |
7614d762 RS |
5623 | A value of t means that the character ^M makes itself and |
5624 | all the rest of the line invisible; also, when saving the buffer | |
5625 | in a file, save the ^M as a newline. */); | |
1ab256cb | 5626 | |
1ab256cb | 5627 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
4b4deea2 | 5628 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5629 | Qnil, |
3f676284 | 5630 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb | 5631 | |
4b4deea2 | 5632 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5633 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5634 | The value should be one of `overwrite-mode-textual', |
5635 | `overwrite-mode-binary', or nil. | |
5636 | If it is `overwrite-mode-textual', self-insertion still | |
5637 | inserts at the end of a line, and inserts when point is before a tab, | |
5638 | until the tab is filled in. | |
5639 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5640 | ||
4b4deea2 | 5641 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5642 | Qnil, |
efc7e75f | 5643 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5644 | |
5645 | If this variable is nil, the value of `standard-display-table' is used. | |
5646 | Each window can have its own, overriding display table, see | |
5647 | `set-window-display-table' and `window-display-table'. | |
5648 | ||
5649 | The display table is a char-table created with `make-display-table'. | |
5650 | A char-table is an array indexed by character codes. Normal array | |
5651 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5652 | ||
5653 | Each of the char-table elements control how to display the corresponding | |
5654 | text character: the element at index C in the table says how to display | |
5655 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5656 | characters or nil. The value nil means display the character in the |
5657 | default fashion; otherwise, the characters from the vector are delivered | |
5658 | to the screen instead of the original character. | |
018ba359 | 5659 | |
5fd11dc8 | 5660 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5661 | to display a capital Y instead of each X character. |
018ba359 PJ |
5662 | |
5663 | In addition, a char-table has six extra slots to control the display of: | |
5664 | ||
5665 | the end of a truncated screen line (extra-slot 0, a single character); | |
5666 | the end of a continued line (extra-slot 1, a single character); | |
5667 | the escape character used to display character codes in octal | |
5668 | (extra-slot 2, a single character); | |
5669 | the character used as an arrow for control characters (extra-slot 3, | |
5670 | a single character); | |
5671 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5672 | a vector of characters); | |
5673 | the character used to draw the border between side-by-side windows | |
5674 | (extra-slot 5, a single character). | |
5675 | ||
5676 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5677 | |
4b4deea2 | 5678 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5679 | Qnil, |
fb7ada5f | 5680 | doc: /* Width of left marginal area for display of a buffer. |
018ba359 | 5681 | A value of nil means no marginal area. */); |
177c0ea7 | 5682 | |
4b4deea2 | 5683 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5684 | Qnil, |
fb7ada5f | 5685 | doc: /* Width of right marginal area for display of a buffer. |
018ba359 | 5686 | A value of nil means no marginal area. */); |
177c0ea7 | 5687 | |
4b4deea2 | 5688 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a | 5689 | Qnil, |
fb7ada5f | 5690 | doc: /* Width of this buffer's left fringe (in pixels). |
2ad8731a KS |
5691 | A value of 0 means no left fringe is shown in this buffer's window. |
5692 | A value of nil means to use the left fringe width from the window's frame. */); | |
5693 | ||
4b4deea2 | 5694 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a | 5695 | Qnil, |
fb7ada5f | 5696 | doc: /* Width of this buffer's right fringe (in pixels). |
2ad8731a KS |
5697 | A value of 0 means no right fringe is shown in this buffer's window. |
5698 | A value of nil means to use the right fringe width from the window's frame. */); | |
5699 | ||
4b4deea2 | 5700 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a | 5701 | Qnil, |
fb7ada5f | 5702 | doc: /* Non-nil means to display fringes outside display margins. |
2ad8731a KS |
5703 | A value of nil means to display fringes between margins and buffer text. */); |
5704 | ||
4b4deea2 | 5705 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a | 5706 | Qnil, |
fb7ada5f | 5707 | doc: /* Width of this buffer's scroll bars in pixels. |
2ad8731a KS |
5708 | A value of nil means to use the scroll bar width from the window's frame. */); |
5709 | ||
4b4deea2 | 5710 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a | 5711 | Qnil, |
fb7ada5f | 5712 | doc: /* Position of this buffer's vertical scroll bar. |
7c6b2007 | 5713 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5714 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5715 | |
fc2c8887 RS |
5716 | A value of `left' or `right' means put the vertical scroll bar at that side |
5717 | of the window; a value of nil means don't show any vertical scroll bars. | |
5718 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5719 | |
0552666b | 5720 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5721 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
fb7ada5f | 5722 | doc: /* Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5723 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5724 | window-systems. */); | |
177c0ea7 | 5725 | |
6b61353c | 5726 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5727 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
fb7ada5f | 5728 | doc: /* Visually indicate buffer boundaries and scrolling. |
6b61353c KH |
5729 | If non-nil, the first and last line of the buffer are marked in the fringe |
5730 | of a window on window-systems with angle bitmaps, or if the window can be | |
5731 | scrolled, the top and bottom line of the window are marked with up and down | |
5732 | arrow bitmaps. | |
b2229037 KS |
5733 | |
5734 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5735 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5736 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5737 | the left fringe but no arrows. |
b2229037 | 5738 | |
79e3497d RS |
5739 | You can exercise more precise control by using an alist as the |
5740 | value. Each alist element (INDICATOR . POSITION) specifies | |
5741 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5742 | `bottom', `up', `down', or t, which specifies the default position, |
5743 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5744 | this indicator. | |
5745 | ||
5746 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5747 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5748 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5749 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5750 | |
c6a46372 | 5751 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5752 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
fb7ada5f | 5753 | doc: /* Mapping from logical to physical fringe indicator bitmaps. |
c6a46372 KS |
5754 | The value is an alist where each element (INDICATOR . BITMAPS) |
5755 | specifies the fringe bitmaps used to display a specific logical | |
5756 | fringe indicator. | |
5757 | ||
5758 | INDICATOR specifies the logical indicator type which is one of the | |
5759 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5760 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5761 | |
14fb5704 | 5762 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5763 | the actual bitmap shown in the left or right fringe for the logical |
5764 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5765 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5766 | are used only for the `bottom' and `top-bottom' indicators when the |
5767 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5768 | symbol which is used in both left and right fringes. */); |
5769 | ||
5770 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5771 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
fb7ada5f | 5772 | doc: /* Mapping from logical to physical fringe cursor bitmaps. |
c6a46372 KS |
5773 | The value is an alist where each element (CURSOR . BITMAP) |
5774 | specifies the fringe bitmaps used to display a specific logical | |
5775 | cursor type in the fringe. | |
5776 | ||
5777 | CURSOR specifies the logical cursor type which is one of the following | |
5778 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5779 | one is used to show a hollow cursor on narrow lines display lines | |
5780 | where the normal hollow cursor will not fit. | |
5781 | ||
5782 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5783 | cursor type. */); | |
5784 | ||
0552666b | 5785 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5786 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5787 | doc: /* How far to scroll windows upward. |
5788 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5789 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5790 | means scroll to center point. A fraction means scroll to put point |
5791 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5792 | When the value is 0.0, point goes at the bottom line, which in the |
5793 | simple case that you moved off with C-f means scrolling just one line. | |
5794 | 1.0 means point goes at the top, so that in that simple case, the | |
5795 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5796 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5797 | |
0552666b | 5798 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5799 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5800 | doc: /* How far to scroll windows downward. |
5801 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5802 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5803 | means scroll to center point. A fraction means scroll to put point |
5804 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5805 | When the value is 0.0, point goes at the top line, which in the |
5806 | simple case that you moved off with C-b means scrolling just one line. | |
5807 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5808 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5809 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5810 | |
1ab256cb RM |
5811 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5812 | "Don't ask."); | |
5813 | */ | |
1ab256cb | 5814 | |
29208e82 | 5815 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5816 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5817 | Two arguments are passed to each function: the positions of |
5818 | the beginning and end of the range of old text to be changed. | |
5819 | \(For an insertion, the beginning and end are at the same place.) | |
5820 | No information is given about the length of the text after the change. | |
5821 | ||
5822 | Buffer changes made while executing the `before-change-functions' | |
5823 | don't call any before-change or after-change functions. | |
7b2bf907 | 5824 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5825 | |
5826 | If an unhandled error happens in running these functions, | |
5827 | the variable's value remains nil. That prevents the error | |
5828 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5829 | Vbefore_change_functions = Qnil; |
5830 | ||
29208e82 | 5831 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5832 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5833 | Three arguments are passed to each function: the positions of |
5834 | the beginning and end of the range of changed text, | |
5835 | and the length in bytes of the pre-change text replaced by that range. | |
5836 | \(For an insertion, the pre-change length is zero; | |
5837 | for a deletion, that length is the number of bytes deleted, | |
5838 | and the post-change beginning and end are at the same place.) | |
5839 | ||
5840 | Buffer changes made while executing the `after-change-functions' | |
5841 | don't call any before-change or after-change functions. | |
7b2bf907 | 5842 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5843 | |
5844 | If an unhandled error happens in running these functions, | |
5845 | the variable's value remains nil. That prevents the error | |
5846 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5847 | Vafter_change_functions = Qnil; |
5848 | ||
29208e82 | 5849 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5850 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5851 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5852 | Vfirst_change_hook = Qnil; |
1ab256cb | 5853 | |
4b4deea2 | 5854 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5855 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5856 | Recent changes come first; older changes follow newer. |
5857 | ||
5858 | An entry (BEG . END) represents an insertion which begins at | |
5859 | position BEG and ends at position END. | |
5860 | ||
5861 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5862 | from (abs POSITION). If POSITION is positive, point was at the front | |
5863 | of the text being deleted; if negative, point was at the end. | |
5864 | ||
d35af63c PE |
5865 | An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously |
5866 | unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time) | |
5867 | and is the visited file's modification time, as of that time. If the | |
018ba359 PJ |
5868 | modification time of the most recent save is different, this entry is |
5869 | obsolete. | |
5870 | ||
5871 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5872 | was modified between BEG and END. PROPERTY is the property name, | |
5873 | and VALUE is the old value. | |
5874 | ||
7405f386 KS |
5875 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5876 | \(apply FUN-NAME ARGS). | |
5877 | ||
5878 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5879 | in the active region. BEG and END is the range affected by this entry | |
5880 | and DELTA is the number of bytes added or deleted in that range by | |
5881 | this change. | |
c6c7dc03 | 5882 | |
018ba359 PJ |
5883 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5884 | was adjusted in position by the offset DISTANCE (an integer). | |
5885 | ||
5886 | An entry of the form POSITION indicates that point was at the buffer | |
5887 | location given by the integer. Undoing an entry of this form places | |
5888 | point at POSITION. | |
5889 | ||
b4c4f2f4 JB |
5890 | Entries with value `nil' mark undo boundaries. The undo command treats |
5891 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5892 | |
5893 | If the value of the variable is t, undo information is not recorded. */); | |
5894 | ||
4b4deea2 | 5895 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5896 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5897 | |
4b4deea2 | 5898 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5899 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5900 | |
5901 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5902 | newlines. Columnar operations (like `move-to-column' and |
5903 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5904 | widths as they go. This works well for ordinary text, but if the |
5905 | buffer's lines are very long (say, more than 500 characters), these | |
5906 | motion functions will take longer to execute. Emacs may also take | |
5907 | longer to update the display. | |
5908 | ||
5629f29b | 5909 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5910 | results of their scans, and consult the cache to avoid rescanning |
5911 | regions of the buffer until the text is modified. The caches are most | |
5912 | beneficial when they prevent the most searching---that is, when the | |
5913 | buffer contains long lines and large regions of characters with the | |
5914 | same, fixed screen width. | |
5915 | ||
5629f29b | 5916 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5917 | become slightly slower (because of the overhead of consulting the |
5918 | cache), and the caches will use memory roughly proportional to the | |
5919 | number of newlines and characters whose screen width varies. | |
5920 | ||
5921 | The caches require no explicit maintenance; their accuracy is | |
5922 | maintained internally by the Emacs primitives. Enabling or disabling | |
5923 | the cache should not affect the behavior of any of the motion | |
5924 | functions; it should only affect their performance. */); | |
5925 | ||
4b4deea2 | 5926 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5927 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5928 | |
4b4deea2 | 5929 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5930 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5931 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5932 | set when a file is visited. */); |
be9aafdd | 5933 | |
71ed49fa | 5934 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5935 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
fb7ada5f | 5936 | doc: /* Format in which to write auto-save files. |
71ed49fa LT |
5937 | Should be a list of symbols naming formats that are defined in `format-alist'. |
5938 | If it is t, which is the default, auto-save files are written in the | |
5939 | same format as a regular save would use. */); | |
5940 | ||
3cb719bd | 5941 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5942 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5943 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5944 | The default is t, which means that text is invisible |
5945 | if it has a non-nil `invisible' property. | |
5946 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5947 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5948 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5949 | then characters with property value PROP are invisible, | |
5950 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5951 | |
7962a441 | 5952 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5953 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5954 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5955 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5956 | |
5957 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5958 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5959 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5960 | The function `set-window-buffer' updates this variable |
5961 | to the value obtained by calling `current-time'. | |
5962 | If the buffer has never been shown in a window, the value is nil. */); | |
5963 | ||
29208e82 | 5964 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5965 | doc: /* Non-nil if Transient Mark mode is enabled. |
5966 | See the command `transient-mark-mode' for a description of this minor mode. | |
5967 | ||
5968 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5969 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5970 | all windows or just the selected window. | |
5971 | ||
f49d1f52 | 5972 | Lisp programs may give this variable certain special values: |
9d794026 | 5973 | |
f49d1f52 SM |
5974 | - A value of `lambda' enables Transient Mark mode temporarily. |
5975 | It is disabled again after any subsequent action that would | |
5976 | normally deactivate the mark (e.g. buffer modification). | |
5977 | ||
5978 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5979 | temporarily. After any subsequent point motion command that is | |
5980 | not shift-translated, or any other action that would normally | |
5981 | deactivate the mark (e.g. buffer modification), the value of | |
5982 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5983 | Vtransient_mark_mode = Qnil; |
5984 | ||
29208e82 | 5985 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
fb7ada5f | 5986 | doc: /* Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5987 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5988 | text properties. If the value is a list, disregard `buffer-read-only' | |
5989 | and disregard a `read-only' text property if the property value | |
5990 | is a member of the list. */); | |
a96b68f1 RS |
5991 | Vinhibit_read_only = Qnil; |
5992 | ||
4b4deea2 | 5993 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5994 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5995 | Values are interpreted as follows: |
5996 | ||
b8dc613f JB |
5997 | t use the cursor specified for the frame |
5998 | nil don't display a cursor | |
5999 | box display a filled box cursor | |
6000 | hollow display a hollow box cursor | |
6001 | bar display a vertical bar cursor with default width | |
6002 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6003 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6004 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6005 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6006 | |
e08b1705 MR |
6007 | When the buffer is displayed in a non-selected window, the |
6008 | cursor's appearance is instead controlled by the variable | |
6009 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6010 | |
a3bbced0 | 6011 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6012 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6013 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6014 | The space is measured in pixels, and put below lines on graphic displays, |
6015 | see `display-graphic-p'. | |
60ebfdf3 | 6016 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6017 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6018 | |
0124c5bd | 6019 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6020 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
fb7ada5f | 6021 | doc: /* Non-nil means show a cursor in non-selected windows. |
66c6abf0 GM |
6022 | If nil, only shows a cursor in the selected window. |
6023 | If t, displays a cursor related to the usual cursor type | |
6024 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6025 | You can also specify the cursor type as in the `cursor-type' variable. | |
6026 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6027 | |
29208e82 | 6028 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6029 | doc: /* List of functions called with no args to query before killing a buffer. |
6030 | The buffer being killed will be current while the functions are running. | |
b7e8d081 MR |
6031 | |
6032 | If any of them returns nil, the buffer is not killed. Functions run by | |
6033 | this hook are supposed to not change the current buffer. */); | |
dcdffbf6 RS |
6034 | Vkill_buffer_query_functions = Qnil; |
6035 | ||
29208e82 | 6036 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6037 | doc: /* Normal hook run before changing the major mode of a buffer. |
6038 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6039 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 6040 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 6041 | |
9397e56f MR |
6042 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6043 | doc: /* Hook run when the buffer list changes. | |
6044 | Functions running this hook are `get-buffer-create', | |
6045 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
96a72ee9 | 6046 | and `bury-buffer-internal'. */); |
9397e56f | 6047 | Vbuffer_list_update_hook = Qnil; |
cd3520a4 | 6048 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6049 | |
0dc88e60 | 6050 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6051 | defsubr (&Sbuffer_list); |
6052 | defsubr (&Sget_buffer); | |
6053 | defsubr (&Sget_file_buffer); | |
6054 | defsubr (&Sget_buffer_create); | |
336cd056 | 6055 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6056 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb | 6057 | defsubr (&Sbuffer_name); |
1ab256cb | 6058 | defsubr (&Sbuffer_file_name); |
336cd056 | 6059 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6060 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6061 | defsubr (&Sbuffer_local_variables); |
6062 | defsubr (&Sbuffer_modified_p); | |
6063 | defsubr (&Sset_buffer_modified_p); | |
6064 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6065 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6066 | defsubr (&Srename_buffer); |
6067 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6068 | defsubr (&Sbuffer_enable_undo); |
6069 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6070 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6071 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6072 | defsubr (&Scurrent_buffer); |
6073 | defsubr (&Sset_buffer); | |
6074 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6075 | defsubr (&Serase_buffer); |
13cda5f9 | 6076 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6077 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6078 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6079 | |
52f8ec73 | 6080 | defsubr (&Soverlayp); |
2eec3b4e RS |
6081 | defsubr (&Smake_overlay); |
6082 | defsubr (&Sdelete_overlay); | |
6083 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6084 | defsubr (&Soverlay_start); |
6085 | defsubr (&Soverlay_end); | |
6086 | defsubr (&Soverlay_buffer); | |
6087 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6088 | defsubr (&Soverlays_at); |
74514898 | 6089 | defsubr (&Soverlays_in); |
2eec3b4e | 6090 | defsubr (&Snext_overlay_change); |
239c932b | 6091 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6092 | defsubr (&Soverlay_recenter); |
6093 | defsubr (&Soverlay_lists); | |
6094 | defsubr (&Soverlay_get); | |
6095 | defsubr (&Soverlay_put); | |
a8c21b48 | 6096 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6097 | } |
6098 | ||
dfcf069d | 6099 | void |
d3da34e0 | 6100 | keys_of_buffer (void) |
1ab256cb RM |
6101 | { |
6102 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6103 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6104 | |
6105 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6106 | initialized when that function gets called. */ | |
d67b4f80 | 6107 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6108 | } |