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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
e9bffc61 | 2 | |
73b0cd50 | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
1ab256cb RM |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 19 | |
68c45bf0 | 20 | #include <config.h> |
1ab256cb | 21 | |
2381d133 JB |
22 | #include <sys/types.h> |
23 | #include <sys/stat.h> | |
1ab256cb | 24 | #include <sys/param.h> |
9dde47f5 | 25 | #include <errno.h> |
15e7873a | 26 | #include <stdio.h> |
d7306fe6 | 27 | #include <setjmp.h> |
dfcf069d | 28 | #include <unistd.h> |
7ee72033 | 29 | |
1ab256cb | 30 | #include "lisp.h" |
21cf4cf8 | 31 | #include "intervals.h" |
1ab256cb RM |
32 | #include "window.h" |
33 | #include "commands.h" | |
34 | #include "buffer.h" | |
8f348ed5 | 35 | #include "character.h" |
28e969dd | 36 | #include "region-cache.h" |
1ab256cb | 37 | #include "indent.h" |
d014bf88 | 38 | #include "blockinput.h" |
2538fae4 | 39 | #include "keyboard.h" |
e35f6ff7 | 40 | #include "keymap.h" |
08460cd4 | 41 | #include "frame.h" |
1ab256cb RM |
42 | |
43 | struct buffer *current_buffer; /* the current buffer */ | |
44 | ||
45 | /* First buffer in chain of all buffers (in reverse order of creation). | |
46 | Threaded through ->next. */ | |
47 | ||
48 | struct buffer *all_buffers; | |
49 | ||
50 | /* This structure holds the default values of the buffer-local variables | |
51 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
52 | The default value occupies the same slot in this structure | |
53 | as an individual buffer's value occupies in that buffer. | |
54 | Setting the default value also goes through the alist of buffers | |
55 | and stores into each buffer that does not say it has a local value. */ | |
56 | ||
6b61353c | 57 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
58 | |
59 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
60 | ||
61 | static Lisp_Object Vbuffer_defaults; | |
62 | ||
63 | /* This structure marks which slots in a buffer have corresponding | |
64 | default values in buffer_defaults. | |
65 | Each such slot has a nonzero value in this structure. | |
66 | The value has only one nonzero bit. | |
67 | ||
68 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
69 | the entry for that slot (found in the same slot in this structure) |
70 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
71 | |
72 | If a slot in this structure is -1, then even though there may | |
73 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
74 | and the corresponding slot in buffer_defaults is not used. | |
75 | ||
1ab256cb RM |
76 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
77 | zero, that is a bug */ | |
78 | ||
79 | struct buffer buffer_local_flags; | |
80 | ||
81 | /* This structure holds the names of symbols whose values may be | |
82 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
83 | ||
6b61353c KH |
84 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
85 | ||
1ab256cb RM |
86 | /* A Lisp_Object pointer to the above, used for staticpro */ |
87 | static Lisp_Object Vbuffer_local_symbols; | |
88 | ||
ce5b453a SM |
89 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
90 | the buffer structure. */ | |
91 | ||
92 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
93 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
94 | ||
13de9290 RS |
95 | /* Flags indicating which built-in buffer-local variables |
96 | are permanent locals. */ | |
7313acd0 | 97 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
98 | |
99 | /* Number of per-buffer variables used. */ | |
100 | ||
7313acd0 | 101 | int last_per_buffer_idx; |
13de9290 | 102 | |
f57e2426 J |
103 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
104 | int after, Lisp_Object arg1, | |
105 | Lisp_Object arg2, Lisp_Object arg3); | |
106 | static void swap_out_buffer_local_variables (struct buffer *b); | |
107 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
108 | |
109 | /* Alist of all buffer names vs the buffers. */ | |
110 | /* This used to be a variable, but is no longer, | |
111 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
112 | Lisp_Object Vbuffer_alist; | |
113 | ||
5b20caf0 | 114 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 115 | |
43ed3b8d | 116 | /* Hook run before changing a major mode. */ |
29208e82 | 117 | Lisp_Object Qchange_major_mode_hook; |
22378665 | 118 | |
dbc4e1c1 | 119 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
120 | Lisp_Object Qbefore_change_functions; |
121 | Lisp_Object Qafter_change_functions; | |
48265e61 | 122 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb RM |
123 | |
124 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
2f7a359d | 125 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
126 | |
127 | Lisp_Object Qprotected_field; | |
128 | ||
129 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
130 | ||
131 | Lisp_Object Qkill_buffer_hook; | |
132 | ||
5fe0b67e RS |
133 | Lisp_Object Qget_file_buffer; |
134 | ||
52f8ec73 JB |
135 | Lisp_Object Qoverlayp; |
136 | ||
2c09a58f | 137 | Lisp_Object Qpriority, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 138 | |
294d215f RS |
139 | Lisp_Object Qmodification_hooks; |
140 | Lisp_Object Qinsert_in_front_hooks; | |
141 | Lisp_Object Qinsert_behind_hooks; | |
142 | ||
f57e2426 J |
143 | static void alloc_buffer_text (struct buffer *, size_t); |
144 | static void free_buffer_text (struct buffer *b); | |
145 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
146 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
147 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 148 | |
1ab256cb RM |
149 | /* For debugging; temporary. See set_buffer_internal. */ |
150 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
151 | ||
01136e9b | 152 | void |
d3da34e0 | 153 | nsberror (Lisp_Object spec) |
1ab256cb | 154 | { |
a7a60ce9 | 155 | if (STRINGP (spec)) |
d5db4077 | 156 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
157 | error ("Invalid buffer argument"); |
158 | } | |
159 | \f | |
0dc88e60 | 160 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
161 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
162 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 163 | (Lisp_Object object) |
0dc88e60 | 164 | { |
4b4deea2 | 165 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
166 | ? Qt : Qnil); |
167 | } | |
168 | ||
08460cd4 | 169 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 170 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
171 | If the optional arg FRAME is a frame, we return the buffer list |
172 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
173 | frame parameter come first, followed by the rest of the buffers. */) | |
5842a27b | 174 | (Lisp_Object frame) |
1ab256cb | 175 | { |
a18b8cb5 | 176 | Lisp_Object general; |
08460cd4 RS |
177 | general = Fmapcar (Qcdr, Vbuffer_alist); |
178 | ||
179 | if (FRAMEP (frame)) | |
180 | { | |
a18b8cb5 KL |
181 | Lisp_Object framelist, prevlist, tail; |
182 | Lisp_Object args[3]; | |
08460cd4 | 183 | |
b7826503 | 184 | CHECK_FRAME (frame); |
08460cd4 RS |
185 | |
186 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 187 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 188 | |
a18b8cb5 KL |
189 | /* Remove from GENERAL any buffer that duplicates one in |
190 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 191 | tail = framelist; |
a18b8cb5 | 192 | while (CONSP (tail)) |
08460cd4 | 193 | { |
7539e11f KR |
194 | general = Fdelq (XCAR (tail), general); |
195 | tail = XCDR (tail); | |
08460cd4 | 196 | } |
a18b8cb5 KL |
197 | tail = prevlist; |
198 | while (CONSP (tail)) | |
199 | { | |
200 | general = Fdelq (XCAR (tail), general); | |
201 | tail = XCDR (tail); | |
202 | } | |
203 | ||
204 | args[0] = framelist; | |
205 | args[1] = general; | |
206 | args[2] = prevlist; | |
207 | return Fnconc (3, args); | |
08460cd4 RS |
208 | } |
209 | ||
210 | return general; | |
1ab256cb RM |
211 | } |
212 | ||
04ae1b48 RS |
213 | /* Like Fassoc, but use Fstring_equal to compare |
214 | (which ignores text properties), | |
215 | and don't ever QUIT. */ | |
216 | ||
217 | static Lisp_Object | |
d3da34e0 | 218 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
219 | { |
220 | register Lisp_Object tail; | |
6d70a280 | 221 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
222 | { |
223 | register Lisp_Object elt, tem; | |
6d70a280 | 224 | elt = XCAR (tail); |
04ae1b48 RS |
225 | tem = Fstring_equal (Fcar (elt), key); |
226 | if (!NILP (tem)) | |
227 | return elt; | |
228 | } | |
229 | return Qnil; | |
230 | } | |
231 | ||
1ab256cb | 232 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
233 | doc: /* Return the buffer named BUFFER-OR-NAME. |
234 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
235 | is a string and there is no buffer with that name, return nil. If | |
236 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 237 | (register Lisp_Object buffer_or_name) |
1ab256cb | 238 | { |
c8804c4f MR |
239 | if (BUFFERP (buffer_or_name)) |
240 | return buffer_or_name; | |
241 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 242 | |
c8804c4f | 243 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
244 | } |
245 | ||
246 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 247 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
248 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
249 | If there is no such live buffer, return nil. | |
7ee72033 | 250 | See also `find-buffer-visiting'. */) |
5842a27b | 251 | (register Lisp_Object filename) |
1ab256cb RM |
252 | { |
253 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
254 | Lisp_Object handler; |
255 | ||
b7826503 | 256 | CHECK_STRING (filename); |
1ab256cb RM |
257 | filename = Fexpand_file_name (filename, Qnil); |
258 | ||
5fe0b67e RS |
259 | /* If the file name has special constructs in it, |
260 | call the corresponding file handler. */ | |
a617e913 | 261 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
262 | if (!NILP (handler)) |
263 | return call2 (handler, Qget_file_buffer, filename); | |
264 | ||
7539e11f | 265 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 266 | { |
7539e11f | 267 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 268 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
269 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
270 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 271 | if (!NILP (tem)) |
1ab256cb RM |
272 | return buf; |
273 | } | |
274 | return Qnil; | |
275 | } | |
276 | ||
52e01189 | 277 | Lisp_Object |
d3da34e0 | 278 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
279 | { |
280 | register Lisp_Object tail, buf, tem; | |
281 | ||
7539e11f | 282 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 283 | { |
7539e11f | 284 | buf = Fcdr (XCAR (tail)); |
52e01189 | 285 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
286 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
287 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
288 | if (!NILP (tem)) |
289 | return buf; | |
290 | } | |
291 | return Qnil; | |
292 | } | |
293 | ||
1ab256cb RM |
294 | /* Incremented for each buffer created, to assign the buffer number. */ |
295 | int buffer_count; | |
296 | ||
297 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
298 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
299 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
300 | return that buffer. If no such buffer exists, create a new buffer with | |
301 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
302 | buffer does not keep undo information. | |
303 | ||
304 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
305 | even if it is dead. The return value is never nil. */) | |
5842a27b | 306 | (register Lisp_Object buffer_or_name) |
1ab256cb | 307 | { |
cd265ca6 | 308 | register Lisp_Object buffer, name; |
1ab256cb RM |
309 | register struct buffer *b; |
310 | ||
cd265ca6 MR |
311 | buffer = Fget_buffer (buffer_or_name); |
312 | if (!NILP (buffer)) | |
313 | return buffer; | |
1ab256cb | 314 | |
cd265ca6 | 315 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
316 | error ("Empty string for buffer name is not allowed"); |
317 | ||
cc648cef | 318 | b = allocate_buffer (); |
1ab256cb | 319 | |
336cd056 RS |
320 | /* An ordinary buffer uses its own struct buffer_text. */ |
321 | b->text = &b->own_text; | |
322 | b->base_buffer = 0; | |
323 | ||
1ab256cb | 324 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 325 | BLOCK_INPUT; |
3b06f880 KH |
326 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
327 | anchoring a search. */ | |
b86af064 | 328 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 329 | UNBLOCK_INPUT; |
1ab256cb | 330 | if (! BUF_BEG_ADDR (b)) |
81841847 | 331 | buffer_memory_full (); |
1ab256cb | 332 | |
6d70a280 SM |
333 | BUF_PT (b) = BEG; |
334 | BUF_GPT (b) = BEG; | |
335 | BUF_BEGV (b) = BEG; | |
336 | BUF_ZV (b) = BEG; | |
337 | BUF_Z (b) = BEG; | |
338 | BUF_PT_BYTE (b) = BEG_BYTE; | |
339 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
340 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
341 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
342 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 343 | BUF_MODIFF (b) = 1; |
3e145152 | 344 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 345 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
346 | BUF_SAVE_MODIFF (b) = 1; |
347 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
348 | BUF_UNCHANGED_MODIFIED (b) = 1; |
349 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
350 | BUF_END_UNCHANGED (b) = 0; | |
351 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 352 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 353 | |
28e969dd JB |
354 | b->newline_cache = 0; |
355 | b->width_run_cache = 0; | |
4b4deea2 | 356 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 357 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 358 | |
1ab256cb RM |
359 | /* Put this on the chain of all buffers including killed ones. */ |
360 | b->next = all_buffers; | |
361 | all_buffers = b; | |
362 | ||
336cd056 RS |
363 | /* An ordinary buffer normally doesn't need markers |
364 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
365 | BVAR (b, pt_marker) = Qnil; |
366 | BVAR (b, begv_marker) = Qnil; | |
367 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 368 | |
cd265ca6 | 369 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 370 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 371 | BVAR (b, name) = name; |
04ae1b48 | 372 | |
4b4deea2 | 373 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
374 | |
375 | reset_buffer (b); | |
13de9290 | 376 | reset_buffer_local_variables (b, 1); |
1ab256cb | 377 | |
4b4deea2 | 378 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 379 | BUF_MARKERS (b) = NULL; |
4b4deea2 | 380 | BVAR (b, name) = name; |
1f57cb74 | 381 | |
1ab256cb | 382 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
383 | XSETBUFFER (buffer, b); |
384 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 385 | |
2f064abf | 386 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
387 | can lead to infinite regress until you run out of stack. rms |
388 | says that's not worth protecting against. */ | |
48265e61 | 389 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
390 | /* buffer is on buffer-alist, so no gcpro. */ |
391 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 392 | |
cd265ca6 | 393 | return buffer; |
336cd056 RS |
394 | } |
395 | ||
7e9d5818 | 396 | |
04e4cb3a GM |
397 | /* Return a list of overlays which is a copy of the overlay list |
398 | LIST, but for buffer B. */ | |
399 | ||
2410d73a | 400 | static struct Lisp_Overlay * |
d3da34e0 | 401 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 402 | { |
2410d73a SM |
403 | Lisp_Object buffer; |
404 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
405 | |
406 | XSETBUFFER (buffer, b); | |
407 | ||
2410d73a | 408 | for (; list; list = list->next) |
04e4cb3a GM |
409 | { |
410 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 411 | EMACS_INT charpos; |
04e4cb3a | 412 | |
2410d73a | 413 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
414 | charpos = marker_position (OVERLAY_START (old_overlay)); |
415 | start = Fmake_marker (); | |
db3a49a6 | 416 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
417 | XMARKER (start)->insertion_type |
418 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
419 | ||
420 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
421 | end = Fmake_marker (); | |
db3a49a6 | 422 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
423 | XMARKER (end)->insertion_type |
424 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
425 | ||
426 | overlay = allocate_misc (); | |
427 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
428 | OVERLAY_START (overlay) = start; | |
429 | OVERLAY_END (overlay) = end; | |
430 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 431 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 432 | |
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 | { |
54622f33 | 453 | Lisp_Object to_buffer; |
7e9d5818 GM |
454 | int offset; |
455 | ||
456 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 457 | |
3ee24aec SM |
458 | /* buffer-local Lisp variables start at `undo_list', |
459 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 460 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
461 | offset < sizeof *to; |
462 | offset += sizeof (Lisp_Object)) | |
463 | { | |
464 | Lisp_Object obj; | |
465 | ||
4b7cdc0e SM |
466 | /* Don't touch the `name' which should be unique for every buffer. */ |
467 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
468 | continue; | |
469 | ||
7e9d5818 | 470 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 471 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
472 | { |
473 | struct Lisp_Marker *m = XMARKER (obj); | |
474 | obj = Fmake_marker (); | |
475 | XMARKER (obj)->insertion_type = m->insertion_type; | |
476 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
477 | } | |
478 | ||
479 | PER_BUFFER_VALUE (to, offset) = obj; | |
480 | } | |
481 | ||
72af86bd | 482 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 483 | |
04e4cb3a GM |
484 | to->overlays_before = copy_overlays (to, from->overlays_before); |
485 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 486 | |
e1688f54 RS |
487 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
488 | and install that in TO. */ | |
4b4deea2 | 489 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
490 | } |
491 | ||
7e9d5818 GM |
492 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
493 | 2, 3, | |
193c3837 | 494 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 495 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 496 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
497 | NAME should be a string which is not the name of an existing buffer. |
498 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
499 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 500 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 501 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 502 | { |
6b61353c | 503 | Lisp_Object buf, tem; |
7e9d5818 | 504 | struct buffer *b; |
336cd056 | 505 | |
6b61353c | 506 | CHECK_STRING (name); |
336cd056 RS |
507 | buf = Fget_buffer (name); |
508 | if (!NILP (buf)) | |
d5db4077 | 509 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 510 | |
6b61353c | 511 | tem = base_buffer; |
336cd056 RS |
512 | base_buffer = Fget_buffer (base_buffer); |
513 | if (NILP (base_buffer)) | |
6b61353c | 514 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 515 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 516 | error ("Base buffer has been killed"); |
336cd056 | 517 | |
d5db4077 | 518 | if (SCHARS (name) == 0) |
336cd056 RS |
519 | error ("Empty string for buffer name is not allowed"); |
520 | ||
cc648cef | 521 | b = allocate_buffer (); |
336cd056 | 522 | |
67ee9f6e SM |
523 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
524 | ? XBUFFER (base_buffer)->base_buffer | |
525 | : XBUFFER (base_buffer)); | |
336cd056 RS |
526 | |
527 | /* Use the base buffer's text object. */ | |
528 | b->text = b->base_buffer->text; | |
529 | ||
530 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
531 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
532 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
533 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
534 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
535 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
536 | |
537 | b->newline_cache = 0; | |
538 | b->width_run_cache = 0; | |
4b4deea2 | 539 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
540 | |
541 | /* Put this on the chain of all buffers including killed ones. */ | |
542 | b->next = all_buffers; | |
543 | all_buffers = b; | |
544 | ||
545 | name = Fcopy_sequence (name); | |
ab77f05c | 546 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 547 | BVAR (b, name) = name; |
336cd056 RS |
548 | |
549 | reset_buffer (b); | |
13de9290 | 550 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
551 | |
552 | /* Put this in the alist of all live buffers. */ | |
553 | XSETBUFFER (buf, b); | |
554 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
555 | ||
4b4deea2 TT |
556 | BVAR (b, mark) = Fmake_marker (); |
557 | BVAR (b, name) = name; | |
336cd056 | 558 | |
abc9d959 | 559 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 560 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 561 | |
336cd056 | 562 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 563 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 564 | { |
4b4deea2 TT |
565 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
566 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
3f236a40 RS |
567 | BUF_PT (b->base_buffer), |
568 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 | 569 | } |
4b4deea2 | 570 | if (NILP (BVAR (b->base_buffer, begv_marker))) |
336cd056 | 571 | { |
4b4deea2 TT |
572 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
573 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
3f236a40 RS |
574 | BUF_BEGV (b->base_buffer), |
575 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 | 576 | } |
4b4deea2 | 577 | if (NILP (BVAR (b->base_buffer, zv_marker))) |
336cd056 | 578 | { |
4b4deea2 TT |
579 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
580 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
3f236a40 RS |
581 | BUF_ZV (b->base_buffer), |
582 | BUF_ZV_BYTE (b->base_buffer)); | |
4b4deea2 | 583 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
584 | } |
585 | ||
7e9d5818 GM |
586 | if (NILP (clone)) |
587 | { | |
588 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 TT |
589 | BVAR (b, pt_marker) = Fmake_marker (); |
590 | set_marker_both (BVAR (b, pt_marker), buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
591 | BVAR (b, begv_marker) = Fmake_marker (); | |
592 | set_marker_both (BVAR (b, begv_marker), buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
593 | BVAR (b, zv_marker) = Fmake_marker (); | |
594 | set_marker_both (BVAR (b, zv_marker), buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
595 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; | |
7e9d5818 GM |
596 | } |
597 | else | |
7fa57e45 RS |
598 | { |
599 | struct buffer *old_b = current_buffer; | |
600 | ||
601 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
602 | BVAR (b, filename) = Qnil; |
603 | BVAR (b, file_truename) = Qnil; | |
604 | BVAR (b, display_count) = make_number (0); | |
605 | BVAR (b, backed_up) = Qnil; | |
606 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
607 | set_buffer_internal_1 (b); |
608 | Fset (intern ("buffer-save-without-query"), Qnil); | |
609 | Fset (intern ("buffer-file-number"), Qnil); | |
610 | Fset (intern ("buffer-stale-function"), Qnil); | |
611 | set_buffer_internal_1 (old_b); | |
612 | } | |
336cd056 | 613 | |
a9ee7a59 | 614 | return buf; |
1ab256cb RM |
615 | } |
616 | ||
d4f5719a | 617 | void |
d3da34e0 | 618 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
619 | { |
620 | Lisp_Object overlay; | |
621 | ||
622 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
623 | have to empty the list, otherwise we end up with overlays that | |
624 | think they belong to this buffer while the buffer doesn't know about | |
625 | them any more. */ | |
626 | while (b->overlays_before) | |
627 | { | |
628 | XSETMISC (overlay, b->overlays_before); | |
629 | Fdelete_overlay (overlay); | |
630 | } | |
631 | while (b->overlays_after) | |
632 | { | |
633 | XSETMISC (overlay, b->overlays_after); | |
634 | Fdelete_overlay (overlay); | |
635 | } | |
636 | eassert (b->overlays_before == NULL); | |
637 | eassert (b->overlays_after == NULL); | |
638 | } | |
639 | ||
bcd40520 | 640 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 641 | and local variables. |
d4f5719a SM |
642 | If called on an already-initialized buffer, the list of overlays |
643 | should be deleted before calling this function, otherwise we end up | |
644 | with overlays that claim to belong to the buffer but the buffer | |
645 | claims it doesn't belong to it. */ | |
1ab256cb RM |
646 | |
647 | void | |
d3da34e0 | 648 | reset_buffer (register struct buffer *b) |
1ab256cb | 649 | { |
4b4deea2 TT |
650 | BVAR (b, filename) = Qnil; |
651 | BVAR (b, file_truename) = Qnil; | |
652 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 653 | b->modtime = 0; |
58b963f7 | 654 | b->modtime_size = -1; |
4b4deea2 | 655 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 656 | b->last_window_start = 1; |
8b264726 | 657 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
658 | b->clip_changed = 0; |
659 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 660 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 661 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 662 | b->auto_save_failure_time = -1; |
4b4deea2 TT |
663 | BVAR (b, auto_save_file_name) = Qnil; |
664 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
665 | b->overlays_before = NULL; |
666 | b->overlays_after = NULL; | |
c2d5b10f | 667 | b->overlay_center = BEG; |
4b4deea2 TT |
668 | BVAR (b, mark_active) = Qnil; |
669 | BVAR (b, point_before_scroll) = Qnil; | |
670 | BVAR (b, file_format) = Qnil; | |
671 | BVAR (b, auto_save_file_format) = Qt; | |
672 | BVAR (b, last_selected_window) = Qnil; | |
673 | XSETINT (BVAR (b, display_count), 0); | |
674 | BVAR (b, display_time) = Qnil; | |
675 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
676 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
677 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
678 | |
679 | b->display_error_modiff = 0; | |
1ab256cb RM |
680 | } |
681 | ||
bcd40520 RS |
682 | /* Reset buffer B's local variables info. |
683 | Don't use this on a buffer that has already been in use; | |
684 | it does not treat permanent locals consistently. | |
13de9290 RS |
685 | Instead, use Fkill_all_local_variables. |
686 | ||
3709505e | 687 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
688 | buffer-local variables. If PERMANENT_TOO is 0, |
689 | we preserve those. */ | |
bcd40520 | 690 | |
13de9290 | 691 | static void |
d3da34e0 | 692 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
693 | { |
694 | register int offset; | |
7c02e886 | 695 | int i; |
1ab256cb RM |
696 | |
697 | /* Reset the major mode to Fundamental, together with all the | |
698 | things that depend on the major mode. | |
699 | default-major-mode is handled at a higher level. | |
700 | We ignore it here. */ | |
4b4deea2 TT |
701 | BVAR (b, major_mode) = Qfundamental_mode; |
702 | BVAR (b, keymap) = Qnil; | |
703 | BVAR (b, mode_name) = QSFundamental; | |
704 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
705 | |
706 | /* If the standard case table has been altered and invalidated, | |
707 | fix up its insides first. */ | |
708 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
709 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
710 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
711 | Fset_standard_case_table (Vascii_downcase_table); | |
712 | ||
4b4deea2 TT |
713 | BVAR (b, downcase_table) = Vascii_downcase_table; |
714 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
715 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
716 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
717 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 718 | |
13de9290 | 719 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 720 | if (permanent_too) |
4b4deea2 | 721 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
722 | else |
723 | { | |
2f7a359d | 724 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 725 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 726 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
727 | { |
728 | /* If permanent-local, keep it. */ | |
729 | last = tmp; | |
730 | if (EQ (prop, Qpermanent_local_hook)) | |
731 | { | |
732 | /* This is a partially permanent hook variable. | |
733 | Preserve only the elements that want to be preserved. */ | |
734 | Lisp_Object list, newlist; | |
735 | list = XCDR (XCAR (tmp)); | |
736 | if (!CONSP (list)) | |
737 | newlist = list; | |
738 | else | |
739 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
740 | { | |
741 | Lisp_Object elt = XCAR (list); | |
742 | /* Preserve element ELT if it's t, | |
743 | if it is a function with a `permanent-local-hook' property, | |
744 | or if it's not a symbol. */ | |
745 | if (! SYMBOLP (elt) | |
746 | || EQ (elt, Qt) | |
747 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
748 | newlist = Fcons (elt, newlist); | |
749 | } | |
750 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
751 | } | |
752 | } | |
753 | /* Delete this local variable. */ | |
3709505e | 754 | else if (NILP (last)) |
4b4deea2 | 755 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
756 | else |
757 | XSETCDR (last, XCDR (tmp)); | |
758 | } | |
759 | ||
7313acd0 | 760 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 761 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 762 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
763 | |
764 | /* For each slot that has a default value, | |
765 | copy that into the slot. */ | |
766 | ||
3ee24aec SM |
767 | /* buffer-local Lisp variables start at `undo_list', |
768 | tho only the ones from `name' on are GC'd normally. */ | |
769 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
770 | offset < sizeof *b; |
771 | offset += sizeof (Lisp_Object)) | |
aab80822 | 772 | { |
7313acd0 | 773 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
774 | if ((idx > 0 |
775 | && (permanent_too | |
ce5b453a | 776 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 777 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 778 | } |
1ab256cb RM |
779 | } |
780 | ||
01050cb5 RM |
781 | /* We split this away from generate-new-buffer, because rename-buffer |
782 | and set-visited-file-name ought to be able to use this to really | |
783 | rename the buffer properly. */ | |
784 | ||
785 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 786 | 1, 2, 0, |
7ee72033 | 787 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
788 | If there is no live buffer named NAME, then return NAME. |
789 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 790 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
791 | Optional second argument IGNORE specifies a name that is okay to use (if |
792 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 793 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
794 | { |
795 | register Lisp_Object gentemp, tem; | |
796 | int count; | |
797 | char number[10]; | |
798 | ||
b7826503 | 799 | CHECK_STRING (name); |
1ab256cb | 800 | |
6b61353c KH |
801 | tem = Fstring_equal (name, ignore); |
802 | if (!NILP (tem)) | |
803 | return name; | |
1ab256cb | 804 | tem = Fget_buffer (name); |
265a9e55 | 805 | if (NILP (tem)) |
01050cb5 | 806 | return name; |
1ab256cb RM |
807 | |
808 | count = 1; | |
809 | while (1) | |
810 | { | |
811 | sprintf (number, "<%d>", ++count); | |
812 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 813 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
814 | if (!NILP (tem)) |
815 | return gentemp; | |
1ab256cb | 816 | tem = Fget_buffer (gentemp); |
265a9e55 | 817 | if (NILP (tem)) |
01050cb5 | 818 | return gentemp; |
1ab256cb RM |
819 | } |
820 | } | |
821 | ||
822 | \f | |
823 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 824 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
825 | BUFFER defaults to the current buffer. |
826 | Return nil if BUFFER has been killed. */) | |
5842a27b | 827 | (register Lisp_Object buffer) |
1ab256cb | 828 | { |
265a9e55 | 829 | if (NILP (buffer)) |
4b4deea2 | 830 | return BVAR (current_buffer, name); |
b7826503 | 831 | CHECK_BUFFER (buffer); |
4b4deea2 | 832 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
833 | } |
834 | ||
835 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
836 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
837 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 838 | (register Lisp_Object buffer) |
1ab256cb | 839 | { |
265a9e55 | 840 | if (NILP (buffer)) |
4b4deea2 | 841 | return BVAR (current_buffer, filename); |
b7826503 | 842 | CHECK_BUFFER (buffer); |
4b4deea2 | 843 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
844 | } |
845 | ||
336cd056 RS |
846 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
847 | 0, 1, 0, | |
7ee72033 | 848 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
849 | If BUFFER is not indirect, return nil. |
850 | BUFFER defaults to the current buffer. */) | |
5842a27b | 851 | (register Lisp_Object buffer) |
336cd056 RS |
852 | { |
853 | struct buffer *base; | |
854 | Lisp_Object base_buffer; | |
855 | ||
856 | if (NILP (buffer)) | |
857 | base = current_buffer->base_buffer; | |
858 | else | |
859 | { | |
b7826503 | 860 | CHECK_BUFFER (buffer); |
336cd056 RS |
861 | base = XBUFFER (buffer)->base_buffer; |
862 | } | |
863 | ||
864 | if (! base) | |
865 | return Qnil; | |
866 | XSETBUFFER (base_buffer, base); | |
867 | return base_buffer; | |
868 | } | |
869 | ||
79aa712d | 870 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 871 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
872 | doc: /* Return the value of VARIABLE in BUFFER. |
873 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 874 | is the default binding of the variable. */) |
5842a27b | 875 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
876 | { |
877 | register struct buffer *buf; | |
878 | register Lisp_Object result; | |
ad97b375 | 879 | struct Lisp_Symbol *sym; |
79aa712d | 880 | |
5e2ad10b | 881 | CHECK_SYMBOL (variable); |
ae69175b | 882 | CHECK_BUFFER (buffer); |
79aa712d | 883 | buf = XBUFFER (buffer); |
ce5b453a | 884 | sym = XSYMBOL (variable); |
79aa712d | 885 | |
ce5b453a SM |
886 | start: |
887 | switch (sym->redirect) | |
f0bac7de | 888 | { |
ce5b453a SM |
889 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
890 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
891 | case SYMBOL_LOCALIZED: | |
892 | { /* Look in local_var_alist. */ | |
893 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
894 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 895 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
896 | if (!NILP (result)) |
897 | { | |
898 | if (blv->fwd) | |
899 | { /* What binding is loaded right now? */ | |
900 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 901 | |
ce5b453a SM |
902 | /* The value of the currently loaded binding is not |
903 | stored in it, but rather in the realvalue slot. | |
904 | Store that value into the binding it belongs to | |
905 | in case that is the one we are about to use. */ | |
f0bac7de | 906 | |
ce5b453a SM |
907 | XSETCDR (current_alist_element, |
908 | do_symval_forwarding (blv->fwd)); | |
909 | } | |
910 | /* Now get the (perhaps updated) value out of the binding. */ | |
911 | result = XCDR (result); | |
912 | } | |
913 | else | |
914 | result = Fdefault_value (variable); | |
915 | break; | |
916 | } | |
917 | case SYMBOL_FORWARDED: | |
918 | { | |
919 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
920 | if (BUFFER_OBJFWDP (fwd)) | |
921 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
922 | else | |
923 | result = Fdefault_value (variable); | |
924 | break; | |
925 | } | |
926 | default: abort (); | |
f0bac7de | 927 | } |
79aa712d | 928 | |
4c4dc0b0 KS |
929 | if (!EQ (result, Qunbound)) |
930 | return result; | |
79aa712d | 931 | |
4c4dc0b0 | 932 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
933 | } |
934 | ||
e1688f54 | 935 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 936 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
937 | in special slots in the buffer object. */ |
938 | ||
939 | static Lisp_Object | |
d3da34e0 | 940 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
941 | { |
942 | Lisp_Object result = Qnil; | |
943 | register Lisp_Object tail; | |
4b4deea2 | 944 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
945 | { |
946 | Lisp_Object val, elt; | |
947 | ||
948 | elt = XCAR (tail); | |
949 | ||
950 | /* Reference each variable in the alist in buf. | |
951 | If inquiring about the current buffer, this gets the current values, | |
952 | so store them into the alist so the alist is up to date. | |
953 | If inquiring about some other buffer, this swaps out any values | |
954 | for that buffer, making the alist up to date automatically. */ | |
955 | val = find_symbol_value (XCAR (elt)); | |
956 | /* Use the current buffer value only if buf is the current buffer. */ | |
957 | if (buf != current_buffer) | |
958 | val = XCDR (elt); | |
959 | ||
ce5b453a | 960 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
961 | } |
962 | ||
963 | return result; | |
964 | } | |
965 | ||
1ab256cb | 966 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 967 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 968 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
969 | Most elements look like (SYMBOL . VALUE), describing one variable. |
970 | For a symbol that is locally unbound, just the symbol appears in the value. | |
971 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 972 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 973 | (register Lisp_Object buffer) |
1ab256cb RM |
974 | { |
975 | register struct buffer *buf; | |
553defa4 | 976 | register Lisp_Object result; |
1ab256cb | 977 | |
265a9e55 | 978 | if (NILP (buffer)) |
1ab256cb RM |
979 | buf = current_buffer; |
980 | else | |
981 | { | |
b7826503 | 982 | CHECK_BUFFER (buffer); |
1ab256cb RM |
983 | buf = XBUFFER (buffer); |
984 | } | |
985 | ||
e1688f54 | 986 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 987 | |
1ab256cb RM |
988 | /* Add on all the variables stored in special slots. */ |
989 | { | |
7c02e886 | 990 | int offset, idx; |
1ab256cb | 991 | |
3ee24aec SM |
992 | /* buffer-local Lisp variables start at `undo_list', |
993 | tho only the ones from `name' on are GC'd normally. */ | |
994 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 995 | offset < sizeof (struct buffer); |
7c02e886 GM |
996 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
997 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 998 | { |
7313acd0 GM |
999 | idx = PER_BUFFER_IDX (offset); |
1000 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1001 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1002 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1003 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1004 | result); |
1ab256cb RM |
1005 | } |
1006 | } | |
553defa4 RS |
1007 | |
1008 | return result; | |
1ab256cb | 1009 | } |
1ab256cb RM |
1010 | \f |
1011 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1012 | 0, 1, 0, |
7ee72033 MB |
1013 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1014 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1015 | (register Lisp_Object buffer) |
1ab256cb RM |
1016 | { |
1017 | register struct buffer *buf; | |
265a9e55 | 1018 | if (NILP (buffer)) |
1ab256cb RM |
1019 | buf = current_buffer; |
1020 | else | |
1021 | { | |
b7826503 | 1022 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1023 | buf = XBUFFER (buffer); |
1024 | } | |
1025 | ||
336cd056 | 1026 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1027 | } |
1028 | ||
1029 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1030 | 1, 1, 0, |
7ee72033 MB |
1031 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1032 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1033 | (register Lisp_Object flag) |
1ab256cb RM |
1034 | { |
1035 | register int already; | |
1036 | register Lisp_Object fn; | |
8ec01c70 | 1037 | Lisp_Object buffer, window; |
1ab256cb RM |
1038 | |
1039 | #ifdef CLASH_DETECTION | |
1040 | /* If buffer becoming modified, lock the file. | |
1041 | If buffer becoming unmodified, unlock the file. */ | |
1042 | ||
4b4deea2 | 1043 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1044 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1045 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1046 | { |
336cd056 | 1047 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1048 | if (!already && !NILP (flag)) |
1ab256cb | 1049 | lock_file (fn); |
265a9e55 | 1050 | else if (already && NILP (flag)) |
1ab256cb RM |
1051 | unlock_file (fn); |
1052 | } | |
1053 | #endif /* CLASH_DETECTION */ | |
1054 | ||
0b5397c2 SM |
1055 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1056 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1057 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1058 | modify SAVE_MODIFF to affect one, we may affect the other | |
1059 | as well. | |
1060 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1061 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1062 | recent-auto-save-p from t to nil. | |
1063 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1064 | we risk changing recent-auto-save-p from nil to t. */ | |
1065 | SAVE_MODIFF = (NILP (flag) | |
1066 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1067 | ? MODIFF | |
1068 | /* Let's try to preserve recent-auto-save-p. */ | |
1069 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1070 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1071 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1072 | or increase MODIFF. */ | |
1073 | : MODIFF++); | |
177c0ea7 | 1074 | |
8ec01c70 GM |
1075 | /* Set update_mode_lines only if buffer is displayed in some window. |
1076 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1077 | state by recording/restoring the state around blocks of code. | |
1078 | Setting update_mode_lines makes redisplay consider all windows | |
1079 | (on all frames). Stealth fontification of buffers not displayed | |
1080 | would incur additional redisplay costs if we'd set | |
1081 | update_modes_lines unconditionally. | |
1082 | ||
1083 | Ideally, I think there should be another mechanism for fontifying | |
1084 | buffers without "modifying" buffers, or redisplay should be | |
1085 | smarter about updating the `*' in mode lines. --gerd */ | |
1086 | XSETBUFFER (buffer, current_buffer); | |
1087 | window = Fget_buffer_window (buffer, Qt); | |
1088 | if (WINDOWP (window)) | |
d57b83b3 GM |
1089 | { |
1090 | ++update_mode_lines; | |
1091 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1092 | } | |
177c0ea7 | 1093 | |
1ab256cb RM |
1094 | return flag; |
1095 | } | |
1096 | ||
a8c21b48 GM |
1097 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1098 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1099 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1100 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1101 | state of the current buffer. Use with care. */) |
5842a27b | 1102 | (Lisp_Object flag) |
a8c21b48 GM |
1103 | { |
1104 | #ifdef CLASH_DETECTION | |
1105 | Lisp_Object fn; | |
177c0ea7 | 1106 | |
a8c21b48 GM |
1107 | /* If buffer becoming modified, lock the file. |
1108 | If buffer becoming unmodified, unlock the file. */ | |
1109 | ||
4b4deea2 | 1110 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1111 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1112 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1113 | { |
1114 | int already = SAVE_MODIFF < MODIFF; | |
1115 | if (!already && !NILP (flag)) | |
1116 | lock_file (fn); | |
1117 | else if (already && NILP (flag)) | |
1118 | unlock_file (fn); | |
1119 | } | |
1120 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1121 | |
a8c21b48 GM |
1122 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1123 | return flag; | |
1124 | } | |
1125 | ||
1ab256cb | 1126 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1127 | 0, 1, 0, |
7ee72033 | 1128 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1129 | Each buffer has a tick counter which is incremented each time the |
1130 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1131 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1132 | (register Lisp_Object buffer) |
1ab256cb RM |
1133 | { |
1134 | register struct buffer *buf; | |
265a9e55 | 1135 | if (NILP (buffer)) |
1ab256cb RM |
1136 | buf = current_buffer; |
1137 | else | |
1138 | { | |
b7826503 | 1139 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1140 | buf = XBUFFER (buffer); |
1141 | } | |
1142 | ||
1143 | return make_number (BUF_MODIFF (buf)); | |
1144 | } | |
3e145152 CY |
1145 | |
1146 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1147 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1148 | doc: /* Return BUFFER's character-change tick counter. | |
1149 | Each buffer has a character-change tick counter, which is set to the | |
1150 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1151 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1152 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1153 | you can tell whether a character change occurred in that buffer in |
1154 | between these calls. No argument or nil as argument means use current | |
1155 | buffer as BUFFER. */) | |
5842a27b | 1156 | (register Lisp_Object buffer) |
3e145152 CY |
1157 | { |
1158 | register struct buffer *buf; | |
1159 | if (NILP (buffer)) | |
1160 | buf = current_buffer; | |
1161 | else | |
1162 | { | |
1163 | CHECK_BUFFER (buffer); | |
1164 | buf = XBUFFER (buffer); | |
1165 | } | |
1166 | ||
1167 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1168 | } | |
1ab256cb | 1169 | \f |
01050cb5 | 1170 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1171 | "(list (read-string \"Rename buffer (to new name): \" \ |
1172 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1173 | current-prefix-arg)", | |
7ee72033 | 1174 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1175 | If second arg UNIQUE is nil or omitted, it is an error if a |
1176 | buffer named NEWNAME already exists. | |
1177 | If UNIQUE is non-nil, come up with a new name using | |
1178 | `generate-new-buffer-name'. | |
1179 | Interactively, you can set UNIQUE with a prefix argument. | |
1180 | We return the name we actually gave the buffer. | |
7ee72033 | 1181 | This does not change the name of the visited file (if any). */) |
5842a27b | 1182 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1183 | { |
1184 | register Lisp_Object tem, buf; | |
1185 | ||
b7826503 | 1186 | CHECK_STRING (newname); |
d59698c4 | 1187 | |
d5db4077 | 1188 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1189 | error ("Empty string is invalid as a buffer name"); |
1190 | ||
489c043a | 1191 | tem = Fget_buffer (newname); |
265a9e55 | 1192 | if (!NILP (tem)) |
01050cb5 | 1193 | { |
8801a864 KR |
1194 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1195 | rename the buffer automatically so you can create another | |
1196 | with the original name. It makes UNIQUE equivalent to | |
1197 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1198 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1199 | return BVAR (current_buffer, name); |
3bd779aa | 1200 | if (!NILP (unique)) |
4b4deea2 | 1201 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1202 | else |
d5db4077 | 1203 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1204 | } |
1ab256cb | 1205 | |
4b4deea2 | 1206 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1207 | |
1208 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1209 | any windows displaying current_buffer will stay unchanged. */ | |
1210 | update_mode_lines++; | |
1211 | ||
67180c6a | 1212 | XSETBUFFER (buf, current_buffer); |
489c043a | 1213 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1214 | if (NILP (BVAR (current_buffer, filename)) |
1215 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1216 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c | 1217 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1218 | return BVAR (current_buffer, name); |
1ab256cb RM |
1219 | } |
1220 | ||
773fbdb9 | 1221 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1222 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1223 | Buffers not visible in windows are preferred to visible buffers, |
1224 | unless optional second argument VISIBLE-OK is non-nil. | |
1225 | If the optional third argument FRAME is non-nil, use that frame's | |
1226 | buffer list instead of the selected frame's buffer list. | |
1227 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 | 1228 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
5842a27b | 1229 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1230 | { |
d3da34e0 | 1231 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
7962a441 | 1232 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1233 | notsogood = Qnil; |
1234 | ||
773fbdb9 | 1235 | if (NILP (frame)) |
9ba9623d | 1236 | frame = selected_frame; |
773fbdb9 | 1237 | |
d234d13e JL |
1238 | CHECK_FRAME (frame); |
1239 | ||
7962a441 | 1240 | tail = Vbuffer_alist; |
773fbdb9 | 1241 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1242 | |
1243 | /* Consider buffers that have been seen in the selected frame | |
1244 | before other buffers. */ | |
177c0ea7 | 1245 | |
773fbdb9 | 1246 | tem = frame_buffer_list (frame); |
7962a441 RS |
1247 | add_ons = Qnil; |
1248 | while (CONSP (tem)) | |
1249 | { | |
7539e11f KR |
1250 | if (BUFFERP (XCAR (tem))) |
1251 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1252 | tem = XCDR (tem); | |
7962a441 RS |
1253 | } |
1254 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1255 | ||
6d70a280 | 1256 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1257 | { |
6d70a280 | 1258 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1259 | if (EQ (buf, buffer)) |
1260 | continue; | |
6b61353c KH |
1261 | if (NILP (buf)) |
1262 | continue; | |
4b4deea2 | 1263 | if (NILP (BVAR (XBUFFER (buf), name))) |
6b61353c | 1264 | continue; |
4b4deea2 | 1265 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
1ab256cb | 1266 | continue; |
04ae1b48 RS |
1267 | /* If the selected frame has a buffer_predicate, |
1268 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1269 | if (!NILP (pred)) |
04ae1b48 | 1270 | { |
7962a441 | 1271 | tem = call1 (pred, buf); |
04ae1b48 RS |
1272 | if (NILP (tem)) |
1273 | continue; | |
1274 | } | |
04ae1b48 | 1275 | |
a0ebb746 | 1276 | if (NILP (visible_ok)) |
66ffe51c | 1277 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1278 | else |
1279 | tem = Qnil; | |
265a9e55 | 1280 | if (NILP (tem)) |
1ab256cb | 1281 | return buf; |
265a9e55 | 1282 | if (NILP (notsogood)) |
1ab256cb RM |
1283 | notsogood = buf; |
1284 | } | |
265a9e55 | 1285 | if (!NILP (notsogood)) |
1ab256cb | 1286 | return notsogood; |
dba1a30a GM |
1287 | buf = Fget_buffer (build_string ("*scratch*")); |
1288 | if (NILP (buf)) | |
1289 | { | |
1290 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1291 | Fset_buffer_major_mode (buf); | |
1292 | } | |
89132f25 | 1293 | return buf; |
1ab256cb RM |
1294 | } |
1295 | \f | |
1ab256cb RM |
1296 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1297 | 0, 1, "", | |
7ee72033 MB |
1298 | doc: /* Start keeping undo information for buffer BUFFER. |
1299 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1300 | (register Lisp_Object buffer) |
1ab256cb | 1301 | { |
ffd56f97 | 1302 | Lisp_Object real_buffer; |
1ab256cb | 1303 | |
ffd56f97 | 1304 | if (NILP (buffer)) |
67180c6a | 1305 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1306 | else |
1307 | { | |
ffd56f97 JB |
1308 | real_buffer = Fget_buffer (buffer); |
1309 | if (NILP (real_buffer)) | |
1310 | nsberror (buffer); | |
1ab256cb RM |
1311 | } |
1312 | ||
4b4deea2 TT |
1313 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1314 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1315 | |
1316 | return Qnil; | |
1317 | } | |
1318 | ||
1319 | /* | |
00b3c7ac | 1320 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1321 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1322 | The buffer being killed will be current while the hook is running.\n\ | |
1323 | See `kill-buffer'." | |
1324 | */ | |
c8804c4f MR |
1325 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1326 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1327 | The argument may be a buffer or the name of an existing buffer. | |
1328 | Argument nil or omitted means kill the current buffer. Return t if the | |
1329 | buffer is actually killed, nil otherwise. | |
1330 | ||
1331 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1332 | windows currently displaying the buffer to be killed. The functions in | |
1333 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1334 | the current buffer. If any of them returns nil, the buffer is not | |
1335 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1336 | actually killed. The buffer being killed will be current while the hook | |
1337 | is running. | |
018ba359 PJ |
1338 | |
1339 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1340 | with SIGHUP. */) |
5842a27b | 1341 | (Lisp_Object buffer_or_name) |
1ab256cb | 1342 | { |
c8804c4f | 1343 | Lisp_Object buffer; |
1ab256cb RM |
1344 | register struct buffer *b; |
1345 | register Lisp_Object tem; | |
1346 | register struct Lisp_Marker *m; | |
6af718a4 | 1347 | struct gcpro gcpro1; |
1ab256cb | 1348 | |
c8804c4f MR |
1349 | if (NILP (buffer_or_name)) |
1350 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1351 | else |
c8804c4f MR |
1352 | buffer = Fget_buffer (buffer_or_name); |
1353 | if (NILP (buffer)) | |
1354 | nsberror (buffer_or_name); | |
1ab256cb | 1355 | |
c8804c4f | 1356 | b = XBUFFER (buffer); |
1ab256cb | 1357 | |
4a4a9db5 | 1358 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1359 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1360 | return Qnil; |
1361 | ||
1ab256cb | 1362 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1363 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1364 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1365 | { |
c8804c4f | 1366 | GCPRO1 (buffer); |
5c4930b0 | 1367 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1368 | BVAR (b, name), make_number (0))); |
1ab256cb | 1369 | UNGCPRO; |
265a9e55 | 1370 | if (NILP (tem)) |
1ab256cb RM |
1371 | return Qnil; |
1372 | } | |
1373 | ||
dcdffbf6 | 1374 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1375 | { |
aed13378 | 1376 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1377 | Lisp_Object arglist[1]; |
1ab256cb RM |
1378 | |
1379 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1380 | set_buffer_internal (b); | |
dcdffbf6 RS |
1381 | |
1382 | /* First run the query functions; if any query is answered no, | |
1383 | don't kill the buffer. */ | |
5b20caf0 | 1384 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1385 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1386 | if (NILP (tem)) | |
5b20caf0 | 1387 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1388 | |
1389 | /* Then run the hooks. */ | |
f1597a3a | 1390 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1391 | unbind_to (count, Qnil); |
1392 | } | |
1393 | ||
1394 | /* We have no more questions to ask. Verify that it is valid | |
1395 | to kill the buffer. This must be done after the questions | |
1396 | since anything can happen within do_yes_or_no_p. */ | |
1397 | ||
1398 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1399 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1400 | return Qnil; |
1401 | ||
4b4deea2 | 1402 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1403 | return Qnil; |
1404 | ||
336cd056 RS |
1405 | /* When we kill a base buffer, kill all its indirect buffers. |
1406 | We do it at this stage so nothing terrible happens if they | |
1407 | ask questions or their hooks get errors. */ | |
1408 | if (! b->base_buffer) | |
1409 | { | |
1410 | struct buffer *other; | |
1411 | ||
c8804c4f | 1412 | GCPRO1 (buffer); |
336cd056 RS |
1413 | |
1414 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1415 | /* all_buffers contains dead buffers too; |
1416 | don't re-kill them. */ | |
4b4deea2 | 1417 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1418 | { |
c8804c4f MR |
1419 | Lisp_Object buffer; |
1420 | XSETBUFFER (buffer, other); | |
1421 | Fkill_buffer (buffer); | |
336cd056 RS |
1422 | } |
1423 | ||
1424 | UNGCPRO; | |
1425 | } | |
177c0ea7 | 1426 | |
1ab256cb RM |
1427 | /* Make this buffer not be current. |
1428 | In the process, notice if this is the sole visible buffer | |
1429 | and give up if so. */ | |
1430 | if (b == current_buffer) | |
1431 | { | |
c8804c4f | 1432 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1433 | Fset_buffer (tem); |
1434 | if (b == current_buffer) | |
1435 | return Qnil; | |
1436 | } | |
1437 | ||
77270fac GM |
1438 | /* Notice if the buffer to kill is the sole visible buffer |
1439 | when we're currently in the mini-buffer, and give up if so. */ | |
1440 | XSETBUFFER (tem, current_buffer); | |
1441 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1442 | { | |
c8804c4f MR |
1443 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1444 | if (EQ (buffer, tem)) | |
77270fac GM |
1445 | return Qnil; |
1446 | } | |
1447 | ||
1ab256cb RM |
1448 | /* Now there is no question: we can kill the buffer. */ |
1449 | ||
1450 | #ifdef CLASH_DETECTION | |
1451 | /* Unlock this buffer's file, if it is locked. */ | |
1452 | unlock_buffer (b); | |
1453 | #endif /* CLASH_DETECTION */ | |
1454 | ||
c8804c4f MR |
1455 | GCPRO1 (buffer); |
1456 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1457 | UNGCPRO; |
1458 | ||
1459 | /* Killing buffer processes may run sentinels which may | |
1460 | have called kill-buffer. */ | |
1461 | ||
4b4deea2 | 1462 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1463 | return Qnil; |
1464 | ||
b93fb365 | 1465 | clear_charpos_cache (b); |
1ab256cb RM |
1466 | |
1467 | tem = Vinhibit_quit; | |
1468 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1469 | replace_buffer_in_all_windows (buffer); |
1470 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1471 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1472 | Vinhibit_quit = tem; |
1473 | ||
9cf712eb RS |
1474 | /* Delete any auto-save file, if we saved it in this session. |
1475 | But not if the buffer is modified. */ | |
4b4deea2 | 1476 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1477 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1478 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1479 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1480 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1481 | { |
1482 | Lisp_Object tem; | |
1483 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1484 | if (! NILP (tem)) |
4b4deea2 | 1485 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1486 | } |
1487 | ||
4a4a9db5 KH |
1488 | if (b->base_buffer) |
1489 | { | |
1490 | /* Unchain all markers that belong to this indirect buffer. | |
1491 | Don't unchain the markers that belong to the base buffer | |
1492 | or its other indirect buffers. */ | |
65745fad | 1493 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1494 | { |
65745fad | 1495 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1496 | if (m->buffer == b) |
65745fad SM |
1497 | unchain_marker (m); |
1498 | m = next; | |
4a4a9db5 KH |
1499 | } |
1500 | } | |
1501 | else | |
1ab256cb | 1502 | { |
4a4a9db5 | 1503 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1504 | and leave them pointing nowhere. */ |
65745fad | 1505 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1506 | { |
65745fad | 1507 | struct Lisp_Marker *next = m->next; |
336cd056 | 1508 | m->buffer = 0; |
65745fad SM |
1509 | m->next = NULL; |
1510 | m = next; | |
336cd056 | 1511 | } |
65745fad | 1512 | BUF_MARKERS (b) = NULL; |
336cd056 | 1513 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1514 | |
1515 | /* Perhaps we should explicitly free the interval tree here... */ | |
1516 | } | |
33f7013e | 1517 | |
2f3f993b RS |
1518 | /* Reset the local variables, so that this buffer's local values |
1519 | won't be protected from GC. They would be protected | |
1520 | if they happened to remain encached in their symbols. | |
1521 | This gets rid of them for certain. */ | |
1522 | swap_out_buffer_local_variables (b); | |
13de9290 | 1523 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1524 | |
4b4deea2 | 1525 | BVAR (b, name) = Qnil; |
336cd056 | 1526 | |
9ac0d9e0 | 1527 | BLOCK_INPUT; |
336cd056 | 1528 | if (! b->base_buffer) |
b86af064 | 1529 | free_buffer_text (b); |
336cd056 | 1530 | |
28e969dd JB |
1531 | if (b->newline_cache) |
1532 | { | |
1533 | free_region_cache (b->newline_cache); | |
1534 | b->newline_cache = 0; | |
1535 | } | |
1536 | if (b->width_run_cache) | |
1537 | { | |
1538 | free_region_cache (b->width_run_cache); | |
1539 | b->width_run_cache = 0; | |
1540 | } | |
4b4deea2 | 1541 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1542 | UNBLOCK_INPUT; |
4b4deea2 | 1543 | BVAR (b, undo_list) = Qnil; |
1ab256cb RM |
1544 | |
1545 | return Qt; | |
1546 | } | |
1547 | \f | |
36a8c287 JB |
1548 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1549 | we do this each time BUF is selected visibly, the more recently | |
1550 | selected buffers are always closer to the front of the list. This | |
1551 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1552 | |
01136e9b | 1553 | void |
d3da34e0 | 1554 | record_buffer (Lisp_Object buf) |
1ab256cb RM |
1555 | { |
1556 | register Lisp_Object link, prev; | |
773fbdb9 | 1557 | Lisp_Object frame; |
9ba9623d | 1558 | frame = selected_frame; |
1ab256cb RM |
1559 | |
1560 | prev = Qnil; | |
7539e11f | 1561 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1562 | { |
7539e11f | 1563 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1564 | break; |
1565 | prev = link; | |
1566 | } | |
1567 | ||
36a8c287 JB |
1568 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1569 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1570 | |
265a9e55 | 1571 | if (NILP (prev)) |
7539e11f | 1572 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1573 | else |
f3fbd155 | 1574 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1575 | |
f3fbd155 | 1576 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1577 | Vbuffer_alist = link; |
7962a441 | 1578 | |
a18b8cb5 | 1579 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1580 | |
a18b8cb5 KL |
1581 | prev = Qnil; |
1582 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1583 | link = XCDR (link)) | |
1584 | { | |
1585 | if (EQ (XCAR (link), buf)) | |
1586 | { | |
1587 | if (NILP (prev)) | |
1588 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1589 | else | |
1590 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1591 | break; | |
1592 | } | |
1593 | prev = link; | |
1594 | } | |
1595 | ||
7962a441 RS |
1596 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1597 | ||
1598 | prev = Qnil; | |
773fbdb9 | 1599 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1600 | link = XCDR (link)) |
7962a441 | 1601 | { |
7539e11f | 1602 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1603 | break; |
1604 | prev = link; | |
1605 | } | |
1606 | ||
1607 | /* Effectively do delq. */ | |
1608 | ||
1609 | if (CONSP (link)) | |
1610 | { | |
1611 | if (NILP (prev)) | |
773fbdb9 | 1612 | set_frame_buffer_list (frame, |
7539e11f | 1613 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1614 | else |
f3fbd155 | 1615 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1616 | |
f3fbd155 | 1617 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1618 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1619 | } |
1620 | else | |
773fbdb9 | 1621 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1622 | } |
1623 | ||
a9ee7a59 | 1624 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1625 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1626 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1627 | according to `default-major-mode'. |
018ba359 | 1628 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1629 | the current buffer's major mode. */) |
5842a27b | 1630 | (Lisp_Object buffer) |
a9ee7a59 KH |
1631 | { |
1632 | int count; | |
1633 | Lisp_Object function; | |
1634 | ||
ea4fddd8 JB |
1635 | CHECK_BUFFER (buffer); |
1636 | ||
4b4deea2 TT |
1637 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1638 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1639 | function = find_symbol_value (intern ("initial-major-mode")); |
1640 | else | |
1641 | { | |
4b4deea2 | 1642 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1643 | if (NILP (function) |
4b4deea2 TT |
1644 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1645 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1646 | } |
177c0ea7 | 1647 | |
48265e61 DL |
1648 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1649 | return Qnil; | |
1650 | ||
aed13378 | 1651 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1652 | |
48265e61 DL |
1653 | /* To select a nonfundamental mode, |
1654 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1655 | |
1656 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1657 | ||
a2428fa2 | 1658 | Fset_buffer (buffer); |
48265e61 | 1659 | call0 (function); |
a9ee7a59 KH |
1660 | |
1661 | return unbind_to (count, Qnil); | |
1662 | } | |
1663 | ||
2594e0fd RS |
1664 | /* Switch to buffer BUFFER in the selected window. |
1665 | If NORECORD is non-nil, don't call record_buffer. */ | |
1666 | ||
1667 | Lisp_Object | |
d3da34e0 | 1668 | switch_to_buffer_1 (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1669 | { |
c8804c4f | 1670 | register Lisp_Object buffer; |
1ab256cb | 1671 | |
c8804c4f MR |
1672 | if (NILP (buffer_or_name)) |
1673 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1674 | else |
a9ee7a59 | 1675 | { |
c8804c4f MR |
1676 | buffer = Fget_buffer (buffer_or_name); |
1677 | if (NILP (buffer)) | |
a9ee7a59 | 1678 | { |
c8804c4f MR |
1679 | buffer = Fget_buffer_create (buffer_or_name); |
1680 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1681 | } |
1682 | } | |
c8804c4f | 1683 | Fset_buffer (buffer); |
265a9e55 | 1684 | if (NILP (norecord)) |
c8804c4f | 1685 | record_buffer (buffer); |
1ab256cb RM |
1686 | |
1687 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1688 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1689 | : selected_window, | |
c8804c4f | 1690 | buffer, Qnil); |
1ab256cb | 1691 | |
c8804c4f | 1692 | return buffer; |
1ab256cb RM |
1693 | } |
1694 | ||
88970542 JL |
1695 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1696 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1697 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1698 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1699 | nil. Return the buffer switched to. | |
a6dced2a | 1700 | |
ee50ff07 MR |
1701 | If BUFFER-OR-NAME is a string and does not identify an existing |
1702 | buffer, create a new buffer with that name. Interactively, if | |
1703 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1704 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1705 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1706 | |
ee50ff07 MR |
1707 | Optional second arg NORECORD non-nil means do not put this buffer |
1708 | at the front of the list of recently selected ones. This | |
1709 | function returns the buffer it switched to as a Lisp object. | |
1710 | ||
1711 | If the selected window is the minibuffer window or dedicated to | |
1712 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1713 | |
1714 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1715 | within a Lisp program! Use `set-buffer' instead. That avoids |
1716 | messing with the window-buffer correspondences. */) | |
5842a27b | 1717 | (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1718 | { |
c8804c4f | 1719 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1720 | { |
611ac521 RS |
1721 | /* Basically a NOP. Avoid signalling an error in the case where |
1722 | the selected window is dedicated, or a minibuffer. */ | |
1723 | ||
c8804c4f MR |
1724 | /* But do put this buffer at the front of the buffer list, unless |
1725 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1726 | at the front of the main buffer-list already, we still want to | |
1727 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1728 | if (NILP (norecord)) |
c8804c4f MR |
1729 | record_buffer (buffer_or_name); |
1730 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1731 | } |
61313fa3 SM |
1732 | else if (EQ (minibuf_window, selected_window) |
1733 | /* If `dedicated' is neither nil nor t, it means it's | |
1734 | dedicatedness can be overridden by an explicit request | |
1735 | such as a call to switch-to-buffer. */ | |
1736 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1737 | /* We can't use the selected window so let `pop-to-buffer' try some |
1738 | other window. */ | |
1739 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1740 | else | |
1741 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1742 | } |
1743 | ||
1ab256cb | 1744 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1745 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1746 | (void) |
1ab256cb RM |
1747 | { |
1748 | register Lisp_Object buf; | |
67180c6a | 1749 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1750 | return buf; |
1751 | } | |
1752 | \f | |
7ec44ec6 GM |
1753 | /* Set the current buffer to B. |
1754 | ||
1755 | We previously set windows_or_buffers_changed here to invalidate | |
1756 | global unchanged information in beg_unchanged and end_unchanged. | |
1757 | This is no longer necessary because we now compute unchanged | |
1758 | information on a buffer-basis. Every action affecting other | |
1759 | windows than the selected one requires a select_window at some | |
1760 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1761 | |
1762 | void | |
d3da34e0 | 1763 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1764 | { |
b5a225b4 | 1765 | if (current_buffer != b) |
7ec44ec6 | 1766 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1767 | } |
1768 | ||
1769 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1770 | This is used by redisplay. */ | |
1771 | ||
1772 | void | |
d3da34e0 | 1773 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1774 | { |
1775 | register struct buffer *old_buf; | |
ce5b453a | 1776 | register Lisp_Object tail; |
c7aa5005 | 1777 | |
b86af064 | 1778 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1779 | if (b->text->beg == NULL) |
b86af064 GM |
1780 | enlarge_buffer_text (b, 0); |
1781 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1782 | |
c7aa5005 KH |
1783 | if (current_buffer == b) |
1784 | return; | |
1785 | ||
1ab256cb RM |
1786 | old_buf = current_buffer; |
1787 | current_buffer = b; | |
1788 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1789 | ||
336cd056 RS |
1790 | if (old_buf) |
1791 | { | |
1792 | /* Put the undo list back in the base buffer, so that it appears | |
1793 | that an indirect buffer shares the undo list of its base. */ | |
1794 | if (old_buf->base_buffer) | |
4b4deea2 | 1795 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1796 | |
1797 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1798 | when it is not current, update them now. */ | |
4b4deea2 | 1799 | if (! NILP (BVAR (old_buf, pt_marker))) |
336cd056 RS |
1800 | { |
1801 | Lisp_Object obuf; | |
1802 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1803 | set_marker_both (BVAR (old_buf, pt_marker), obuf, |
3f236a40 | 1804 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); |
336cd056 | 1805 | } |
4b4deea2 | 1806 | if (! NILP (BVAR (old_buf, begv_marker))) |
336cd056 RS |
1807 | { |
1808 | Lisp_Object obuf; | |
1809 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1810 | set_marker_both (BVAR (old_buf, begv_marker), obuf, |
3f236a40 | 1811 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); |
336cd056 | 1812 | } |
4b4deea2 | 1813 | if (! NILP (BVAR (old_buf, zv_marker))) |
336cd056 RS |
1814 | { |
1815 | Lisp_Object obuf; | |
1816 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1817 | set_marker_both (BVAR (old_buf, zv_marker), obuf, |
3f236a40 | 1818 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); |
336cd056 RS |
1819 | } |
1820 | } | |
1821 | ||
1822 | /* Get the undo list from the base buffer, so that it appears | |
1823 | that an indirect buffer shares the undo list of its base. */ | |
1824 | if (b->base_buffer) | |
4b4deea2 | 1825 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1826 | |
1827 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1828 | when it is not current, fetch them now. */ | |
4b4deea2 | 1829 | if (! NILP (BVAR (b, pt_marker))) |
3f236a40 | 1830 | { |
4b4deea2 TT |
1831 | BUF_PT (b) = marker_position (BVAR (b, pt_marker)); |
1832 | BUF_PT_BYTE (b) = marker_byte_position (BVAR (b, pt_marker)); | |
3f236a40 | 1833 | } |
4b4deea2 | 1834 | if (! NILP (BVAR (b, begv_marker))) |
3f236a40 | 1835 | { |
4b4deea2 TT |
1836 | BUF_BEGV (b) = marker_position (BVAR (b, begv_marker)); |
1837 | BUF_BEGV_BYTE (b) = marker_byte_position (BVAR (b, begv_marker)); | |
3f236a40 | 1838 | } |
4b4deea2 | 1839 | if (! NILP (BVAR (b, zv_marker))) |
3f236a40 | 1840 | { |
4b4deea2 TT |
1841 | BUF_ZV (b) = marker_position (BVAR (b, zv_marker)); |
1842 | BUF_ZV_BYTE (b) = marker_byte_position (BVAR (b, zv_marker)); | |
3f236a40 | 1843 | } |
336cd056 | 1844 | |
1ab256cb RM |
1845 | /* Look down buffer's list of local Lisp variables |
1846 | to find and update any that forward into C variables. */ | |
1847 | ||
ce5b453a | 1848 | do |
1ab256cb | 1849 | { |
4b4deea2 | 1850 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1851 | { |
1852 | Lisp_Object var = XCAR (XCAR (tail)); | |
1853 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1854 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1855 | && SYMBOL_BLV (sym)->fwd) | |
1856 | /* Just reference the variable | |
1857 | to cause it to become set for this buffer. */ | |
1858 | Fsymbol_value (var); | |
1859 | } | |
1ab256cb | 1860 | } |
1ab256cb | 1861 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1862 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1863 | } |
1864 | ||
336cd056 | 1865 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1866 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1867 | |
1868 | void | |
d3da34e0 | 1869 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1870 | { |
1871 | register struct buffer *old_buf; | |
1872 | ||
1873 | if (current_buffer == b) | |
1874 | return; | |
1875 | ||
1876 | old_buf = current_buffer; | |
1877 | current_buffer = b; | |
1878 | ||
1879 | if (old_buf) | |
1880 | { | |
1881 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1882 | when it is not current, update them now. */ | |
4b4deea2 | 1883 | if (! NILP (BVAR (old_buf, pt_marker))) |
336cd056 RS |
1884 | { |
1885 | Lisp_Object obuf; | |
1886 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1887 | set_marker_both (BVAR (old_buf, pt_marker), obuf, |
3f236a40 | 1888 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); |
336cd056 | 1889 | } |
4b4deea2 | 1890 | if (! NILP (BVAR (old_buf, begv_marker))) |
336cd056 RS |
1891 | { |
1892 | Lisp_Object obuf; | |
1893 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1894 | set_marker_both (BVAR (old_buf, begv_marker), obuf, |
3f236a40 | 1895 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); |
336cd056 | 1896 | } |
4b4deea2 | 1897 | if (! NILP (BVAR (old_buf, zv_marker))) |
336cd056 RS |
1898 | { |
1899 | Lisp_Object obuf; | |
1900 | XSETBUFFER (obuf, old_buf); | |
4b4deea2 | 1901 | set_marker_both (BVAR (old_buf, zv_marker), obuf, |
3f236a40 | 1902 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); |
336cd056 RS |
1903 | } |
1904 | } | |
1905 | ||
1906 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1907 | when it is not current, fetch them now. */ | |
4b4deea2 | 1908 | if (! NILP (BVAR (b, pt_marker))) |
3f236a40 | 1909 | { |
4b4deea2 TT |
1910 | BUF_PT (b) = marker_position (BVAR (b, pt_marker)); |
1911 | BUF_PT_BYTE (b) = marker_byte_position (BVAR (b, pt_marker)); | |
3f236a40 | 1912 | } |
4b4deea2 | 1913 | if (! NILP (BVAR (b, begv_marker))) |
3f236a40 | 1914 | { |
4b4deea2 TT |
1915 | BUF_BEGV (b) = marker_position (BVAR (b, begv_marker)); |
1916 | BUF_BEGV_BYTE (b) = marker_byte_position (BVAR (b, begv_marker)); | |
3f236a40 | 1917 | } |
4b4deea2 | 1918 | if (! NILP (BVAR (b, zv_marker))) |
3f236a40 | 1919 | { |
4b4deea2 TT |
1920 | BUF_ZV (b) = marker_position (BVAR (b, zv_marker)); |
1921 | BUF_ZV_BYTE (b) = marker_byte_position (BVAR (b, zv_marker)); | |
3f236a40 | 1922 | } |
336cd056 RS |
1923 | } |
1924 | ||
1ab256cb | 1925 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1926 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1927 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1928 | also `save-excursion' when you want to make a buffer current | |
1929 | temporarily. This function does not display the buffer, so its effect | |
1930 | ends when the current command terminates. Use `switch-to-buffer' or | |
1931 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1932 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1933 | { |
c8804c4f MR |
1934 | register Lisp_Object buffer; |
1935 | buffer = Fget_buffer (buffer_or_name); | |
1936 | if (NILP (buffer)) | |
1937 | nsberror (buffer_or_name); | |
4b4deea2 | 1938 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1939 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1940 | set_buffer_internal (XBUFFER (buffer)); |
1941 | return buffer; | |
1ab256cb | 1942 | } |
d0628b06 RS |
1943 | |
1944 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1945 | ||
1946 | Lisp_Object | |
d3da34e0 | 1947 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1948 | { |
4b4deea2 | 1949 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1950 | Fset_buffer (buffer); |
1951 | return Qnil; | |
1952 | } | |
1ab256cb RM |
1953 | \f |
1954 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1955 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 | 1956 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1957 | (void) |
1ab256cb | 1958 | { |
4b4deea2 | 1959 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1960 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1961 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1962 | return Qnil; |
1963 | } | |
1964 | ||
1965 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 1966 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 1967 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
1968 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
1969 | default. | |
1970 | ||
1971 | The argument may be a buffer name or an actual buffer object. If | |
1972 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
1973 | from the selected window if it is displayed there. If the selected |
1974 | window is dedicated to its buffer, delete that window if there are other | |
1975 | windows on the same frame. If the selected window is the only window on | |
1976 | its frame, iconify that frame. */) | |
5842a27b | 1977 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1978 | { |
c8804c4f MR |
1979 | Lisp_Object buffer; |
1980 | ||
b271272a | 1981 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 1982 | if (NILP (buffer_or_name)) |
a5611885 | 1983 | { |
c58dab63 | 1984 | Lisp_Object tem; |
a2428fa2 | 1985 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1986 | |
c58dab63 | 1987 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1988 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1989 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1990 | { |
1991 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1992 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1993 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1994 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1995 | else | |
1996 | Fdelete_window (selected_window); | |
1997 | } | |
a5611885 | 1998 | } |
1ab256cb RM |
1999 | else |
2000 | { | |
c8804c4f MR |
2001 | buffer = Fget_buffer (buffer_or_name); |
2002 | if (NILP (buffer)) | |
2003 | nsberror (buffer_or_name); | |
b271272a JB |
2004 | } |
2005 | ||
a1a8b28e GM |
2006 | /* Move buffer to the end of the buffer list. Do nothing if the |
2007 | buffer is killed. */ | |
4b4deea2 | 2008 | if (!NILP (BVAR (XBUFFER (buffer), name))) |
a1a8b28e GM |
2009 | { |
2010 | Lisp_Object aelt, link; | |
b271272a | 2011 | |
a1a8b28e GM |
2012 | aelt = Frassq (buffer, Vbuffer_alist); |
2013 | link = Fmemq (aelt, Vbuffer_alist); | |
2014 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2015 | XSETCDR (link, Qnil); |
a1a8b28e | 2016 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2017 | |
a18b8cb5 KL |
2018 | XFRAME (selected_frame)->buffer_list |
2019 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2020 | XFRAME (selected_frame)->buried_buffer_list | |
2021 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2022 | } |
dec989eb | 2023 | |
1ab256cb RM |
2024 | return Qnil; |
2025 | } | |
2026 | \f | |
c922bc55 | 2027 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2028 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2029 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2030 | so the buffer is truly empty after this. */) |
5842a27b | 2031 | (void) |
1ab256cb RM |
2032 | { |
2033 | Fwiden (); | |
c0d9a0c3 GM |
2034 | |
2035 | del_range (BEG, Z); | |
c280bc6a | 2036 | |
1ab256cb RM |
2037 | current_buffer->last_window_start = 1; |
2038 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2039 | if future size is less than past size. Use of erase-buffer | |
2040 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2041 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2042 | return Qnil; |
2043 | } | |
2044 | ||
01136e9b | 2045 | void |
d3da34e0 | 2046 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2047 | { |
b7826503 PJ |
2048 | CHECK_NUMBER_COERCE_MARKER (*b); |
2049 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2050 | |
2051 | if (XINT (*b) > XINT (*e)) | |
2052 | { | |
03192067 KH |
2053 | Lisp_Object tem; |
2054 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2055 | } |
2056 | ||
2057 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2058 | && XINT (*e) <= ZV)) | |
2059 | args_out_of_range (*b, *e); | |
2060 | } | |
2061 | \f | |
b05525fa RS |
2062 | /* Advance BYTE_POS up to a character boundary |
2063 | and return the adjusted position. */ | |
2064 | ||
2065 | static int | |
145582a0 | 2066 | advance_to_char_boundary (EMACS_INT byte_pos) |
b05525fa | 2067 | { |
f8449323 | 2068 | int c; |
b05525fa | 2069 | |
f8449323 RS |
2070 | if (byte_pos == BEG) |
2071 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2072 | return BEG; |
f8449323 RS |
2073 | |
2074 | c = FETCH_BYTE (byte_pos); | |
2075 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2076 | { |
1be6387d | 2077 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2078 | multibyte sequence. */ |
145582a0 | 2079 | EMACS_INT orig_byte_pos = byte_pos; |
a9bcded1 KH |
2080 | |
2081 | do | |
2082 | { | |
2083 | byte_pos--; | |
2084 | c = FETCH_BYTE (byte_pos); | |
2085 | } | |
2086 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2087 | INC_POS (byte_pos); |
a9bcded1 KH |
2088 | if (byte_pos < orig_byte_pos) |
2089 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2090 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2091 | surely advance to the correct character boundary. If C is | |
2092 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2093 | } |
2094 | ||
20773569 | 2095 | return byte_pos; |
b05525fa RS |
2096 | } |
2097 | ||
baae5c2d | 2098 | #ifdef REL_ALLOC |
f57e2426 | 2099 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2100 | #endif /* REL_ALLOC */ |
2101 | ||
13cda5f9 SM |
2102 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2103 | 1, 1, 0, | |
2104 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2105 | (Lisp_Object buffer) |
13cda5f9 SM |
2106 | { |
2107 | struct buffer *other_buffer; | |
2108 | CHECK_BUFFER (buffer); | |
2109 | other_buffer = XBUFFER (buffer); | |
2110 | ||
4b4deea2 | 2111 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2112 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2113 | |
13cda5f9 SM |
2114 | /* Actually, it probably works just fine. |
2115 | * if (other_buffer == current_buffer) | |
2116 | * error ("Cannot swap a buffer's text with itself"); */ | |
2117 | ||
2118 | /* Actually, this may be workable as well, tho probably only if they're | |
2119 | *both* indirect. */ | |
2120 | if (other_buffer->base_buffer | |
2121 | || current_buffer->base_buffer) | |
2122 | error ("Cannot swap indirect buffers's text"); | |
2123 | ||
2124 | { /* This is probably harder to make work. */ | |
2125 | struct buffer *other; | |
2126 | for (other = all_buffers; other; other = other->next) | |
2127 | if (other->base_buffer == other_buffer | |
2128 | || other->base_buffer == current_buffer) | |
2129 | error ("One of the buffers to swap has indirect buffers"); | |
2130 | } | |
2131 | ||
2132 | #define swapfield(field, type) \ | |
2133 | do { \ | |
2134 | type tmp##field = other_buffer->field; \ | |
2135 | other_buffer->field = current_buffer->field; \ | |
2136 | current_buffer->field = tmp##field; \ | |
2137 | } while (0) | |
5d8ea120 TT |
2138 | #define swapfield_(field, type) \ |
2139 | do { \ | |
4b4deea2 TT |
2140 | type tmp##field = BVAR (other_buffer, field); \ |
2141 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2142 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2143 | } while (0) |
13cda5f9 SM |
2144 | |
2145 | swapfield (own_text, struct buffer_text); | |
2146 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2147 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2148 | #ifdef REL_ALLOC |
40b615d6 JR |
2149 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2150 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2151 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2152 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2153 | #endif /* REL_ALLOC */ |
2154 | ||
13cda5f9 SM |
2155 | swapfield (pt, EMACS_INT); |
2156 | swapfield (pt_byte, EMACS_INT); | |
2157 | swapfield (begv, EMACS_INT); | |
2158 | swapfield (begv_byte, EMACS_INT); | |
2159 | swapfield (zv, EMACS_INT); | |
2160 | swapfield (zv_byte, EMACS_INT); | |
2161 | eassert (!current_buffer->base_buffer); | |
2162 | eassert (!other_buffer->base_buffer); | |
2163 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2164 | swapfield (newline_cache, struct region_cache *); | |
2165 | swapfield (width_run_cache, struct region_cache *); | |
2166 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2167 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2168 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2169 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2170 | swapfield (overlay_center, EMACS_INT); | |
5d8ea120 TT |
2171 | swapfield_ (undo_list, Lisp_Object); |
2172 | swapfield_ (mark, Lisp_Object); | |
2173 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2174 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2175 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2176 | /* FIXME: Not sure what we should do with these *_marker fields. |
2177 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2178 | swapfield_ (pt_marker, Lisp_Object); |
2179 | swapfield_ (begv_marker, Lisp_Object); | |
2180 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2181 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2182 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2183 | |
2184 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2185 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2186 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2187 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2188 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2189 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2190 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2191 | { |
2192 | struct Lisp_Marker *m; | |
2193 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2194 | if (m->buffer == other_buffer) | |
2195 | m->buffer = current_buffer; | |
b8ff72fa SM |
2196 | else |
2197 | /* Since there's no indirect buffer in sight, markers on | |
2198 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2199 | eassert (!m->buffer); | |
13cda5f9 SM |
2200 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2201 | if (m->buffer == current_buffer) | |
2202 | m->buffer = other_buffer; | |
b8ff72fa SM |
2203 | else |
2204 | /* Since there's no indirect buffer in sight, markers on | |
2205 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2206 | eassert (!m->buffer); | |
13cda5f9 | 2207 | } |
126f1fc1 SM |
2208 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2209 | So since we just swapped the markers between the two buffers, we need | |
2210 | to undo the effect of this swap for window markers. */ | |
2211 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2212 | Lisp_Object buf1, buf2; | |
2213 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2214 | ||
2215 | while (NILP (Fmemq (w, ws))) | |
2216 | { | |
2217 | ws = Fcons (w, ws); | |
2218 | if (MARKERP (XWINDOW (w)->pointm) | |
2219 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2220 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2221 | Fset_marker (XWINDOW (w)->pointm, | |
2222 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2223 | XWINDOW (w)->buffer); | |
2224 | w = Fnext_window (w, Qt, Qt); | |
2225 | } | |
2226 | } | |
2227 | ||
13cda5f9 SM |
2228 | if (current_buffer->text->intervals) |
2229 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2230 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2231 | if (other_buffer->text->intervals) | |
2232 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2233 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2234 | ||
2235 | return Qnil; | |
2236 | } | |
2237 | ||
3ac81adb RS |
2238 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2239 | 1, 1, 0, | |
7ee72033 | 2240 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2241 | If FLAG is t, this makes the buffer a multibyte buffer. |
2242 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2243 | In these cases, the buffer contents remain unchanged as a sequence of |
2244 | bytes but the contents viewed as characters do change. | |
2245 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2246 | all eight-bit bytes to eight-bit characters. |
2247 | If the multibyte flag was really changed, undo information of the | |
2248 | current buffer is cleared. */) | |
5842a27b | 2249 | (Lisp_Object flag) |
3ac81adb | 2250 | { |
65745fad | 2251 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2252 | struct buffer *other; |
145582a0 | 2253 | EMACS_INT begv, zv; |
8d1203ea | 2254 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2255 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2256 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2257 | struct gcpro gcpro1; |
3ac81adb | 2258 | |
6e553d5e RS |
2259 | if (current_buffer->base_buffer) |
2260 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2261 | ||
70e77119 | 2262 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2263 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2264 | return flag; |
2265 | ||
38babc07 KS |
2266 | GCPRO1 (old_undo); |
2267 | ||
2268 | /* Don't record these buffer changes. We will put a special undo entry | |
2269 | instead. */ | |
4b4deea2 | 2270 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2271 | |
3ac81adb RS |
2272 | /* If the cached position is for this buffer, clear it out. */ |
2273 | clear_charpos_cache (current_buffer); | |
2274 | ||
458c8af4 KH |
2275 | if (NILP (flag)) |
2276 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2277 | else | |
2278 | begv = BEGV, zv = ZV; | |
2279 | ||
a9bcded1 KH |
2280 | if (narrowed) |
2281 | Fwiden (); | |
2282 | ||
3ac81adb RS |
2283 | if (NILP (flag)) |
2284 | { | |
145582a0 | 2285 | EMACS_INT pos, stop; |
a9bcded1 KH |
2286 | unsigned char *p; |
2287 | ||
3ac81adb RS |
2288 | /* Do this first, so it can use CHAR_TO_BYTE |
2289 | to calculate the old correspondences. */ | |
2290 | set_intervals_multibyte (0); | |
2291 | ||
4b4deea2 | 2292 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2293 | |
2294 | Z = Z_BYTE; | |
2295 | BEGV = BEGV_BYTE; | |
2296 | ZV = ZV_BYTE; | |
2297 | GPT = GPT_BYTE; | |
2298 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2299 | ||
60ebfdf3 | 2300 | |
65745fad SM |
2301 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2302 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2303 | |
2304 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2305 | pos = BEG; | |
2306 | stop = GPT; | |
2307 | p = BEG_ADDR; | |
2308 | while (1) | |
2309 | { | |
2310 | int c, bytes; | |
2311 | ||
2312 | if (pos == stop) | |
2313 | { | |
2314 | if (pos == Z) | |
2315 | break; | |
2316 | p = GAP_END_ADDR; | |
2317 | stop = Z; | |
2318 | } | |
8f348ed5 KH |
2319 | if (ASCII_BYTE_P (*p)) |
2320 | p++, pos++; | |
2321 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2322 | { |
62a6e103 | 2323 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2324 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2325 | last one, and change the last one to the character |
a9bcded1 KH |
2326 | code. */ |
2327 | bytes--; | |
2328 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2329 | p = GAP_END_ADDR; | |
2330 | *p++ = c; | |
2331 | pos++; | |
2332 | if (begv > pos) | |
2333 | begv -= bytes; | |
2334 | if (zv > pos) | |
2335 | zv -= bytes; | |
2336 | stop = Z; | |
2337 | } | |
8f924df7 | 2338 | else |
8f348ed5 KH |
2339 | { |
2340 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2341 | p += bytes, pos += bytes; | |
2342 | } | |
a9bcded1 KH |
2343 | } |
2344 | if (narrowed) | |
2345 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2346 | } |
2347 | else | |
2348 | { | |
145582a0 EZ |
2349 | EMACS_INT pt = PT; |
2350 | EMACS_INT pos, stop; | |
8f348ed5 | 2351 | unsigned char *p, *pend; |
a9bcded1 | 2352 | |
673c57d2 | 2353 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2354 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2355 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2356 | |
8f924df7 | 2357 | if (EQ (flag, Qt) |
a3a303df | 2358 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2359 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2360 | { | |
2361 | unsigned char *p = GPT_ADDR - 1; | |
2362 | ||
2363 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
409f2919 | 2364 | if (LEADING_CODE_P (*p)) |
673c57d2 | 2365 | { |
145582a0 | 2366 | EMACS_INT new_gpt = GPT_BYTE - (GPT_ADDR - p); |
673c57d2 KH |
2367 | |
2368 | move_gap_both (new_gpt, new_gpt); | |
2369 | } | |
2370 | } | |
2371 | ||
a9bcded1 KH |
2372 | /* Make the buffer contents valid as multibyte by converting |
2373 | 8-bit characters to multibyte form. */ | |
2374 | pos = BEG; | |
2375 | stop = GPT; | |
2376 | p = BEG_ADDR; | |
8f348ed5 | 2377 | pend = GPT_ADDR; |
a9bcded1 KH |
2378 | while (1) |
2379 | { | |
2380 | int bytes; | |
2381 | ||
2382 | if (pos == stop) | |
2383 | { | |
2384 | if (pos == Z) | |
2385 | break; | |
2386 | p = GAP_END_ADDR; | |
8f348ed5 | 2387 | pend = Z_ADDR; |
a9bcded1 KH |
2388 | stop = Z; |
2389 | } | |
177c0ea7 | 2390 | |
a3a303df KH |
2391 | if (ASCII_BYTE_P (*p)) |
2392 | p++, pos++; | |
dcfb9bc4 KH |
2393 | else if (EQ (flag, Qt) |
2394 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2395 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2396 | p += bytes, pos += bytes; |
2397 | else | |
2398 | { | |
2399 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2400 | int c; |
a9bcded1 | 2401 | |
8f924df7 | 2402 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2403 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2404 | *p = tmp[0]; |
2405 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2406 | bytes--; | |
b68864e5 | 2407 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2408 | /* Now the gap is after the just inserted data. */ |
2409 | pos = GPT; | |
2410 | p = GAP_END_ADDR; | |
2411 | if (pos <= begv) | |
2412 | begv += bytes; | |
2413 | if (pos <= zv) | |
2414 | zv += bytes; | |
2415 | if (pos <= pt) | |
2416 | pt += bytes; | |
31285a8f | 2417 | pend = Z_ADDR; |
a9bcded1 KH |
2418 | stop = Z; |
2419 | } | |
2420 | } | |
2421 | ||
2422 | if (pt != PT) | |
2423 | TEMP_SET_PT (pt); | |
2424 | ||
2425 | if (narrowed) | |
2426 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2427 | ||
3ac81adb RS |
2428 | /* Do this first, so that chars_in_text asks the right question. |
2429 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2430 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2431 | |
b05525fa | 2432 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2433 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2434 | |
673c57d2 | 2435 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2436 | |
2437 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2438 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2439 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2440 | else |
2441 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2442 | |
2443 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2444 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2445 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2446 | else |
2447 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2448 | |
2449 | { | |
145582a0 EZ |
2450 | EMACS_INT pt_byte = advance_to_char_boundary (PT_BYTE); |
2451 | EMACS_INT pt; | |
b05525fa RS |
2452 | |
2453 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2454 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2455 | else |
2456 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2457 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2458 | } | |
3ac81adb RS |
2459 | |
2460 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2461 | |
2462 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2463 | getting confused by the markers that have not yet been updated. | |
2464 | It is also a signal that it should never create a marker. */ | |
65745fad | 2465 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2466 | |
65745fad | 2467 | for (; tail; tail = tail->next) |
3ac81adb | 2468 | { |
65745fad SM |
2469 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2470 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2471 | } |
b69f9797 RS |
2472 | |
2473 | /* Make sure no markers were put on the chain | |
2474 | while the chain value was incorrect. */ | |
65745fad | 2475 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2476 | abort (); |
2477 | ||
3ac81adb RS |
2478 | BUF_MARKERS (current_buffer) = markers; |
2479 | ||
2480 | /* Do this last, so it can calculate the new correspondences | |
2481 | between chars and bytes. */ | |
2482 | set_intervals_multibyte (1); | |
2483 | } | |
2484 | ||
38babc07 KS |
2485 | if (!EQ (old_undo, Qt)) |
2486 | { | |
2487 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2488 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2489 | intern ("set-buffer-multibyte"), |
2490 | NILP (flag) ? Qt : Qnil), | |
2491 | old_undo); | |
38babc07 KS |
2492 | } |
2493 | ||
2494 | UNGCPRO; | |
a9bcded1 | 2495 | |
724b203f GM |
2496 | /* Changing the multibyteness of a buffer means that all windows |
2497 | showing that buffer must be updated thoroughly. */ | |
2498 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2499 | ++windows_or_buffers_changed; | |
2500 | ||
abc9d959 RS |
2501 | /* Copy this buffer's new multibyte status |
2502 | into all of its indirect buffers. */ | |
2503 | for (other = all_buffers; other; other = other->next) | |
4b4deea2 | 2504 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2505 | { |
4b4deea2 TT |
2506 | BVAR (other, enable_multibyte_characters) |
2507 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2508 | other->prevent_redisplay_optimizations_p = 1; |
2509 | } | |
abc9d959 | 2510 | |
ed00559d KH |
2511 | /* Restore the modifiedness of the buffer. */ |
2512 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2513 | Fset_buffer_modified_p (Qnil); | |
2514 | ||
172f9454 KH |
2515 | /* Update coding systems of this buffer's process (if any). */ |
2516 | { | |
2517 | Lisp_Object process; | |
2518 | ||
2519 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2520 | if (PROCESSP (process)) | |
2521 | setup_process_coding_systems (process); | |
2522 | } | |
2523 | ||
3ac81adb RS |
2524 | return flag; |
2525 | } | |
2526 | \f | |
1ab256cb | 2527 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2528 | 0, 0, 0, |
7ee72033 | 2529 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2530 | Most local variable bindings are eliminated so that the default values |
2531 | become effective once more. Also, the syntax table is set from | |
2532 | `standard-syntax-table', the local keymap is set to nil, | |
2533 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2534 | This function also forces redisplay of the mode line. | |
2535 | ||
2536 | Every function to select a new major mode starts by | |
2537 | calling this function. | |
2538 | ||
2539 | As a special exception, local variables whose names have | |
2540 | a non-nil `permanent-local' property are not eliminated by this function. | |
2541 | ||
2542 | The first thing this function does is run | |
7ee72033 | 2543 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2544 | (void) |
1ab256cb | 2545 | { |
fd186f07 | 2546 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2547 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2548 | |
3709505e | 2549 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2550 | remain swapped in, in their symbols. */ |
1ab256cb | 2551 | |
2f3f993b | 2552 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2553 | |
2554 | /* Actually eliminate all local bindings of this buffer. */ | |
2555 | ||
13de9290 | 2556 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2557 | |
1ab256cb RM |
2558 | /* Force mode-line redisplay. Useful here because all major mode |
2559 | commands call this function. */ | |
2560 | update_mode_lines++; | |
2561 | ||
2562 | return Qnil; | |
2563 | } | |
2f3f993b RS |
2564 | |
2565 | /* Make sure no local variables remain set up with buffer B | |
2566 | for their current values. */ | |
2567 | ||
2568 | static void | |
d3da34e0 | 2569 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2570 | { |
ce5b453a | 2571 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2572 | |
2573 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2574 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2575 | |
67ee9f6e | 2576 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2577 | { |
ce5b453a SM |
2578 | Lisp_Object sym = XCAR (XCAR (alist)); |
2579 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2580 | /* Need not do anything if some other buffer's binding is | |
2581 | now encached. */ | |
2582 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2583 | { |
e7c10f83 SM |
2584 | /* Symbol is set up for this buffer's old local value: |
2585 | swap it out! */ | |
ce5b453a | 2586 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2587 | } |
2588 | } | |
2589 | } | |
1ab256cb | 2590 | \f |
2eec3b4e | 2591 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2592 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2593 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2594 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2595 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2596 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2597 | or where an overlay starts which ends at or after POS; |
624d2678 | 2598 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2599 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2600 | |
2601 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2602 | when this function is called. |
2603 | ||
2604 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2605 | If EXTEND is zero, we never extend the vector, | |
2606 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2607 | But we still return the total number of overlays. |
2608 | ||
2609 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2610 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2611 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2612 | |
2613 | int | |
d3da34e0 JB |
2614 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2615 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2616 | { |
2410d73a SM |
2617 | Lisp_Object overlay, start, end; |
2618 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2619 | int idx = 0; |
2620 | int len = *len_ptr; | |
2621 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2622 | EMACS_INT next = ZV; |
2623 | EMACS_INT prev = BEGV; | |
61d54cd5 RS |
2624 | int inhibit_storing = 0; |
2625 | ||
2410d73a | 2626 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2627 | { |
145582a0 | 2628 | EMACS_INT startpos, endpos; |
52f8ec73 | 2629 | |
2410d73a | 2630 | XSETMISC (overlay, tail); |
1ab256cb | 2631 | |
2eec3b4e RS |
2632 | start = OVERLAY_START (overlay); |
2633 | end = OVERLAY_END (overlay); | |
239c932b RS |
2634 | endpos = OVERLAY_POSITION (end); |
2635 | if (endpos < pos) | |
2636 | { | |
2637 | if (prev < endpos) | |
2638 | prev = endpos; | |
2639 | break; | |
2640 | } | |
413e06a4 RS |
2641 | startpos = OVERLAY_POSITION (start); |
2642 | /* This one ends at or after POS | |
daa1c109 | 2643 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2644 | if (prev < startpos && startpos < pos) |
2645 | prev = startpos; | |
239c932b RS |
2646 | if (endpos == pos) |
2647 | continue; | |
2eec3b4e RS |
2648 | if (startpos <= pos) |
2649 | { | |
2650 | if (idx == len) | |
2651 | { | |
61d54cd5 RS |
2652 | /* The supplied vector is full. |
2653 | Either make it bigger, or don't store any more in it. */ | |
2654 | if (extend) | |
2655 | { | |
0552666b GM |
2656 | /* Make it work with an initial len == 0. */ |
2657 | len *= 2; | |
2658 | if (len == 0) | |
2659 | len = 4; | |
2660 | *len_ptr = len; | |
61d54cd5 RS |
2661 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2662 | *vec_ptr = vec; | |
2663 | } | |
2664 | else | |
2665 | inhibit_storing = 1; | |
2eec3b4e | 2666 | } |
61d54cd5 RS |
2667 | |
2668 | if (!inhibit_storing) | |
2669 | vec[idx] = overlay; | |
2670 | /* Keep counting overlays even if we can't return them all. */ | |
2671 | idx++; | |
2eec3b4e RS |
2672 | } |
2673 | else if (startpos < next) | |
2674 | next = startpos; | |
2675 | } | |
2676 | ||
2410d73a | 2677 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2678 | { |
145582a0 | 2679 | EMACS_INT startpos, endpos; |
52f8ec73 | 2680 | |
2410d73a | 2681 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2682 | |
2683 | start = OVERLAY_START (overlay); | |
2684 | end = OVERLAY_END (overlay); | |
2685 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2686 | if (pos < startpos) |
2eec3b4e RS |
2687 | { |
2688 | if (startpos < next) | |
2689 | next = startpos; | |
2690 | break; | |
2691 | } | |
239c932b RS |
2692 | endpos = OVERLAY_POSITION (end); |
2693 | if (pos < endpos) | |
2eec3b4e RS |
2694 | { |
2695 | if (idx == len) | |
2696 | { | |
61d54cd5 RS |
2697 | if (extend) |
2698 | { | |
4b0e44fc RS |
2699 | /* Make it work with an initial len == 0. */ |
2700 | len *= 2; | |
0552666b | 2701 | if (len == 0) |
4b0e44fc RS |
2702 | len = 4; |
2703 | *len_ptr = len; | |
61d54cd5 RS |
2704 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2705 | *vec_ptr = vec; | |
2706 | } | |
2707 | else | |
2708 | inhibit_storing = 1; | |
2eec3b4e | 2709 | } |
61d54cd5 RS |
2710 | |
2711 | if (!inhibit_storing) | |
2712 | vec[idx] = overlay; | |
2713 | idx++; | |
413e06a4 RS |
2714 | |
2715 | if (startpos < pos && startpos > prev) | |
2716 | prev = startpos; | |
2eec3b4e | 2717 | } |
239c932b RS |
2718 | else if (endpos < pos && endpos > prev) |
2719 | prev = endpos; | |
1d5f4c1d MB |
2720 | else if (endpos == pos && startpos > prev |
2721 | && (!change_req || startpos < pos)) | |
413e06a4 | 2722 | prev = startpos; |
1ab256cb RM |
2723 | } |
2724 | ||
239c932b RS |
2725 | if (next_ptr) |
2726 | *next_ptr = next; | |
2727 | if (prev_ptr) | |
2728 | *prev_ptr = prev; | |
2eec3b4e RS |
2729 | return idx; |
2730 | } | |
74514898 | 2731 | \f |
7723e095 MR |
2732 | /* Find all the overlays in the current buffer that overlap the range |
2733 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2734 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2735 | |
177c0ea7 | 2736 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2737 | Store in *LEN_PTR the size allocated for the vector. |
2738 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2739 | or ZV if there are no more overlays. | |
2740 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2741 | or BEGV if there are no previous overlays. | |
2742 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2743 | ||
2744 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2745 | when this function is called. | |
2746 | ||
2747 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2748 | If EXTEND is zero, we never extend the vector, | |
2749 | and we store only as many overlays as will fit. | |
2750 | But we still return the total number of overlays. */ | |
2751 | ||
a9b9a780 | 2752 | static int |
145582a0 EZ |
2753 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
2754 | Lisp_Object **vec_ptr, int *len_ptr, | |
2755 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr) | |
74514898 | 2756 | { |
2410d73a SM |
2757 | Lisp_Object overlay, ostart, oend; |
2758 | struct Lisp_Overlay *tail; | |
74514898 RS |
2759 | int idx = 0; |
2760 | int len = *len_ptr; | |
2761 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2762 | EMACS_INT next = ZV; |
2763 | EMACS_INT prev = BEGV; | |
74514898 | 2764 | int inhibit_storing = 0; |
7723e095 | 2765 | int end_is_Z = end == Z; |
74514898 | 2766 | |
2410d73a | 2767 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2768 | { |
145582a0 | 2769 | EMACS_INT startpos, endpos; |
74514898 | 2770 | |
2410d73a | 2771 | XSETMISC (overlay, tail); |
74514898 RS |
2772 | |
2773 | ostart = OVERLAY_START (overlay); | |
2774 | oend = OVERLAY_END (overlay); | |
2775 | endpos = OVERLAY_POSITION (oend); | |
2776 | if (endpos < beg) | |
2777 | { | |
2778 | if (prev < endpos) | |
2779 | prev = endpos; | |
2780 | break; | |
2781 | } | |
2782 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2783 | /* Count an interval if it overlaps the range, is empty at the |
2784 | start of the range, or is empty at END provided END denotes the | |
2785 | end of the buffer. */ | |
74514898 | 2786 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2787 | || (startpos == endpos |
2788 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2789 | { |
2790 | if (idx == len) | |
2791 | { | |
2792 | /* The supplied vector is full. | |
2793 | Either make it bigger, or don't store any more in it. */ | |
2794 | if (extend) | |
2795 | { | |
4b0e44fc RS |
2796 | /* Make it work with an initial len == 0. */ |
2797 | len *= 2; | |
2798 | if (len == 0) | |
2799 | len = 4; | |
2800 | *len_ptr = len; | |
74514898 RS |
2801 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2802 | *vec_ptr = vec; | |
2803 | } | |
2804 | else | |
2805 | inhibit_storing = 1; | |
2806 | } | |
2807 | ||
2808 | if (!inhibit_storing) | |
2809 | vec[idx] = overlay; | |
2810 | /* Keep counting overlays even if we can't return them all. */ | |
2811 | idx++; | |
2812 | } | |
2813 | else if (startpos < next) | |
2814 | next = startpos; | |
2815 | } | |
2816 | ||
2410d73a | 2817 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2818 | { |
145582a0 | 2819 | EMACS_INT startpos, endpos; |
74514898 | 2820 | |
2410d73a | 2821 | XSETMISC (overlay, tail); |
74514898 RS |
2822 | |
2823 | ostart = OVERLAY_START (overlay); | |
2824 | oend = OVERLAY_END (overlay); | |
2825 | startpos = OVERLAY_POSITION (ostart); | |
2826 | if (end < startpos) | |
2827 | { | |
2828 | if (startpos < next) | |
2829 | next = startpos; | |
2830 | break; | |
2831 | } | |
2832 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2833 | /* Count an interval if it overlaps the range, is empty at the |
2834 | start of the range, or is empty at END provided END denotes the | |
2835 | end of the buffer. */ | |
74514898 | 2836 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2837 | || (startpos == endpos |
2838 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2839 | { |
2840 | if (idx == len) | |
2841 | { | |
2842 | if (extend) | |
2843 | { | |
4b0e44fc RS |
2844 | /* Make it work with an initial len == 0. */ |
2845 | len *= 2; | |
2846 | if (len == 0) | |
2847 | len = 4; | |
2848 | *len_ptr = len; | |
74514898 RS |
2849 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2850 | *vec_ptr = vec; | |
2851 | } | |
2852 | else | |
2853 | inhibit_storing = 1; | |
2854 | } | |
2855 | ||
2856 | if (!inhibit_storing) | |
2857 | vec[idx] = overlay; | |
2858 | idx++; | |
2859 | } | |
2860 | else if (endpos < beg && endpos > prev) | |
2861 | prev = endpos; | |
2862 | } | |
fc04fa47 | 2863 | |
74514898 RS |
2864 | if (next_ptr) |
2865 | *next_ptr = next; | |
2866 | if (prev_ptr) | |
2867 | *prev_ptr = prev; | |
2868 | return idx; | |
2869 | } | |
09a22085 GM |
2870 | |
2871 | ||
2872 | /* Return non-zero if there exists an overlay with a non-nil | |
2873 | `mouse-face' property overlapping OVERLAY. */ | |
2874 | ||
2875 | int | |
d3da34e0 | 2876 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2877 | { |
145582a0 EZ |
2878 | EMACS_INT start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2879 | EMACS_INT end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2880 | int n, i, size; |
09a22085 | 2881 | Lisp_Object *v, tem; |
177c0ea7 | 2882 | |
bfd8410f GM |
2883 | size = 10; |
2884 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2885 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2886 | if (n > size) | |
09a22085 | 2887 | { |
09a22085 GM |
2888 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2889 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2890 | } | |
2891 | ||
2892 | for (i = 0; i < n; ++i) | |
2893 | if (!EQ (v[i], overlay) | |
2894 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2895 | !NILP (tem))) | |
2896 | break; | |
2897 | ||
2898 | return i < n; | |
2899 | } | |
2900 | ||
2901 | ||
74514898 | 2902 | \f |
fc04fa47 KH |
2903 | /* Fast function to just test if we're at an overlay boundary. */ |
2904 | int | |
145582a0 | 2905 | overlay_touches_p (EMACS_INT pos) |
fc04fa47 | 2906 | { |
2410d73a SM |
2907 | Lisp_Object overlay; |
2908 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2909 | |
2410d73a | 2910 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2911 | { |
145582a0 | 2912 | EMACS_INT endpos; |
fc04fa47 | 2913 | |
2410d73a | 2914 | XSETMISC (overlay ,tail); |
8e50cc2d | 2915 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2916 | abort (); |
2917 | ||
2918 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2919 | if (endpos < pos) | |
2920 | break; | |
2921 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2922 | return 1; | |
2923 | } | |
2924 | ||
2410d73a | 2925 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2926 | { |
145582a0 | 2927 | EMACS_INT startpos; |
fc04fa47 | 2928 | |
2410d73a | 2929 | XSETMISC (overlay, tail); |
8e50cc2d | 2930 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2931 | abort (); |
2932 | ||
2933 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2934 | if (pos < startpos) | |
2935 | break; | |
2936 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2937 | return 1; | |
2938 | } | |
2939 | return 0; | |
2940 | } | |
2eec3b4e | 2941 | \f |
5985d248 KH |
2942 | struct sortvec |
2943 | { | |
2944 | Lisp_Object overlay; | |
145582a0 | 2945 | EMACS_INT beg, end; |
5985d248 KH |
2946 | int priority; |
2947 | }; | |
2948 | ||
2949 | static int | |
d3da34e0 | 2950 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2951 | { |
dfcf069d AS |
2952 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2953 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2954 | if (s1->priority != s2->priority) |
2955 | return s1->priority - s2->priority; | |
2956 | if (s1->beg != s2->beg) | |
2957 | return s1->beg - s2->beg; | |
2958 | if (s1->end != s2->end) | |
2959 | return s2->end - s1->end; | |
2960 | return 0; | |
2961 | } | |
2962 | ||
2963 | /* Sort an array of overlays by priority. The array is modified in place. | |
2964 | The return value is the new size; this may be smaller than the original | |
2965 | size if some of the overlays were invalid or were window-specific. */ | |
2966 | int | |
d3da34e0 | 2967 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
2968 | { |
2969 | int i, j; | |
2970 | struct sortvec *sortvec; | |
2971 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2972 | ||
2973 | /* Put the valid and relevant overlays into sortvec. */ | |
2974 | ||
2975 | for (i = 0, j = 0; i < noverlays; i++) | |
2976 | { | |
0fa767e7 | 2977 | Lisp_Object tem; |
c99fc30f | 2978 | Lisp_Object overlay; |
5985d248 | 2979 | |
c99fc30f | 2980 | overlay = overlay_vec[i]; |
5985d248 KH |
2981 | if (OVERLAY_VALID (overlay) |
2982 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2983 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2984 | { | |
0fa767e7 KH |
2985 | /* If we're interested in a specific window, then ignore |
2986 | overlays that are limited to some other window. */ | |
2987 | if (w) | |
5985d248 | 2988 | { |
0fa767e7 KH |
2989 | Lisp_Object window; |
2990 | ||
2991 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2992 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2993 | continue; |
5985d248 | 2994 | } |
0fa767e7 KH |
2995 | |
2996 | /* This overlay is good and counts: put it into sortvec. */ | |
2997 | sortvec[j].overlay = overlay; | |
2998 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2999 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3000 | tem = Foverlay_get (overlay, Qpriority); | |
3001 | if (INTEGERP (tem)) | |
3002 | sortvec[j].priority = XINT (tem); | |
3003 | else | |
3004 | sortvec[j].priority = 0; | |
3005 | j++; | |
5985d248 KH |
3006 | } |
3007 | } | |
3008 | noverlays = j; | |
3009 | ||
3010 | /* Sort the overlays into the proper order: increasing priority. */ | |
3011 | ||
3012 | if (noverlays > 1) | |
3013 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3014 | ||
3015 | for (i = 0; i < noverlays; i++) | |
3016 | overlay_vec[i] = sortvec[i].overlay; | |
3017 | return (noverlays); | |
3018 | } | |
3019 | \f | |
bbbe9545 KH |
3020 | struct sortstr |
3021 | { | |
cb26008f | 3022 | Lisp_Object string, string2; |
bbbe9545 KH |
3023 | int size; |
3024 | int priority; | |
3025 | }; | |
3026 | ||
e8185fa8 KH |
3027 | struct sortstrlist |
3028 | { | |
3029 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3030 | int size; /* Allocated length of that array. */ | |
3031 | int used; /* How much of the array is currently in use. */ | |
145582a0 | 3032 | EMACS_INT bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3033 | }; |
3034 | ||
3035 | /* Buffers for storing information about the overlays touching a given | |
3036 | position. These could be automatic variables in overlay_strings, but | |
3037 | it's more efficient to hold onto the memory instead of repeatedly | |
3038 | allocating and freeing it. */ | |
3039 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3040 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3041 | |
3042 | /* Allocated length of overlay_str_buf. */ | |
145582a0 | 3043 | static EMACS_INT overlay_str_len; |
e8185fa8 | 3044 | |
bbbe9545 KH |
3045 | /* A comparison function suitable for passing to qsort. */ |
3046 | static int | |
d3da34e0 | 3047 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3048 | { |
3049 | struct sortstr *s1 = (struct sortstr *)as1; | |
3050 | struct sortstr *s2 = (struct sortstr *)as2; | |
3051 | if (s1->size != s2->size) | |
3052 | return s2->size - s1->size; | |
3053 | if (s1->priority != s2->priority) | |
3054 | return s1->priority - s2->priority; | |
3055 | return 0; | |
3056 | } | |
3057 | ||
e8185fa8 | 3058 | static void |
d3da34e0 | 3059 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, Lisp_Object str2, Lisp_Object pri, int size) |
e8185fa8 | 3060 | { |
145582a0 | 3061 | EMACS_INT nbytes; |
43d27a72 | 3062 | |
e8185fa8 KH |
3063 | if (ssl->used == ssl->size) |
3064 | { | |
3065 | if (ssl->buf) | |
3066 | ssl->size *= 2; | |
3067 | else | |
3068 | ssl->size = 5; | |
3069 | ssl->buf = ((struct sortstr *) | |
3070 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3071 | } | |
3072 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3073 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3074 | ssl->buf[ssl->used].size = size; |
3075 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3076 | ssl->used++; | |
43d27a72 | 3077 | |
4b4deea2 | 3078 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3079 | nbytes = SCHARS (str); |
43d27a72 | 3080 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3081 | nbytes = count_size_as_multibyte (SDATA (str), |
3082 | SBYTES (str)); | |
43d27a72 | 3083 | else |
d5db4077 | 3084 | nbytes = SBYTES (str); |
43d27a72 RS |
3085 | |
3086 | ssl->bytes += nbytes; | |
3087 | ||
cb26008f | 3088 | if (STRINGP (str2)) |
43d27a72 | 3089 | { |
4b4deea2 | 3090 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3091 | nbytes = SCHARS (str2); |
43d27a72 | 3092 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3093 | nbytes = count_size_as_multibyte (SDATA (str2), |
3094 | SBYTES (str2)); | |
43d27a72 | 3095 | else |
d5db4077 | 3096 | nbytes = SBYTES (str2); |
43d27a72 RS |
3097 | |
3098 | ssl->bytes += nbytes; | |
3099 | } | |
e8185fa8 | 3100 | } |
bbbe9545 KH |
3101 | |
3102 | /* Return the concatenation of the strings associated with overlays that | |
3103 | begin or end at POS, ignoring overlays that are specific to a window | |
3104 | other than W. The strings are concatenated in the appropriate order: | |
3105 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3106 | lower. Normally all of the after-strings come first, but zero-sized |
3107 | overlays have their after-strings ride along with the before-strings | |
3108 | because it would look strange to print them inside-out. | |
3109 | ||
3110 | Returns the string length, and stores the contents indirectly through | |
3111 | PSTR, if that variable is non-null. The string may be overwritten by | |
3112 | subsequent calls. */ | |
6b5d3b89 | 3113 | |
5816888b | 3114 | EMACS_INT |
d3da34e0 | 3115 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3116 | { |
2410d73a SM |
3117 | Lisp_Object overlay, window, str; |
3118 | struct Lisp_Overlay *ov; | |
145582a0 | 3119 | EMACS_INT startpos, endpos; |
4b4deea2 | 3120 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3121 | |
e8185fa8 KH |
3122 | overlay_heads.used = overlay_heads.bytes = 0; |
3123 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3124 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3125 | { |
2410d73a | 3126 | XSETMISC (overlay, ov); |
c2d5b10f | 3127 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3128 | |
3129 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3130 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3131 | if (endpos < pos) | |
3132 | break; | |
3133 | if (endpos != pos && startpos != pos) | |
3134 | continue; | |
3135 | window = Foverlay_get (overlay, Qwindow); | |
3136 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3137 | continue; | |
e8185fa8 KH |
3138 | if (startpos == pos |
3139 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3140 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3141 | (startpos == endpos |
3142 | ? Foverlay_get (overlay, Qafter_string) | |
3143 | : Qnil), | |
3144 | Foverlay_get (overlay, Qpriority), | |
3145 | endpos - startpos); | |
3146 | else if (endpos == pos | |
3147 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3148 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3149 | Foverlay_get (overlay, Qpriority), |
3150 | endpos - startpos); | |
bbbe9545 | 3151 | } |
2410d73a | 3152 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3153 | { |
2410d73a SM |
3154 | XSETMISC (overlay, ov); |
3155 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3156 | |
3157 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3158 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3159 | if (startpos > pos) | |
3160 | break; | |
e8185fa8 KH |
3161 | if (endpos != pos && startpos != pos) |
3162 | continue; | |
3163 | window = Foverlay_get (overlay, Qwindow); | |
3164 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3165 | continue; | |
e8185fa8 KH |
3166 | if (startpos == pos |
3167 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3168 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3169 | (startpos == endpos |
3170 | ? Foverlay_get (overlay, Qafter_string) | |
3171 | : Qnil), | |
3172 | Foverlay_get (overlay, Qpriority), | |
3173 | endpos - startpos); | |
3174 | else if (endpos == pos | |
3175 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3176 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3177 | Foverlay_get (overlay, Qpriority), |
3178 | endpos - startpos); | |
bbbe9545 | 3179 | } |
e8185fa8 KH |
3180 | if (overlay_tails.used > 1) |
3181 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3182 | cmp_for_strings); | |
3183 | if (overlay_heads.used > 1) | |
3184 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3185 | cmp_for_strings); | |
3186 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3187 | { |
e8185fa8 | 3188 | Lisp_Object tem; |
145582a0 | 3189 | EMACS_INT i; |
9f4d7cde | 3190 | unsigned char *p; |
145582a0 | 3191 | EMACS_INT total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3192 | |
3193 | if (total > overlay_str_len) | |
9f4d7cde RS |
3194 | { |
3195 | overlay_str_len = total; | |
3196 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3197 | total); | |
3198 | } | |
bbbe9545 | 3199 | p = overlay_str_buf; |
e8185fa8 | 3200 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3201 | { |
145582a0 | 3202 | EMACS_INT nbytes; |
e8185fa8 | 3203 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3204 | nbytes = copy_text (SDATA (tem), p, |
3205 | SBYTES (tem), | |
43d27a72 RS |
3206 | STRING_MULTIBYTE (tem), multibyte); |
3207 | p += nbytes; | |
bbbe9545 | 3208 | } |
e8185fa8 | 3209 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3210 | { |
145582a0 | 3211 | EMACS_INT nbytes; |
e8185fa8 | 3212 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3213 | nbytes = copy_text (SDATA (tem), p, |
3214 | SBYTES (tem), | |
43d27a72 RS |
3215 | STRING_MULTIBYTE (tem), multibyte); |
3216 | p += nbytes; | |
cb26008f KH |
3217 | tem = overlay_heads.buf[i].string2; |
3218 | if (STRINGP (tem)) | |
3219 | { | |
d5db4077 KR |
3220 | nbytes = copy_text (SDATA (tem), p, |
3221 | SBYTES (tem), | |
43d27a72 RS |
3222 | STRING_MULTIBYTE (tem), multibyte); |
3223 | p += nbytes; | |
cb26008f | 3224 | } |
bbbe9545 | 3225 | } |
cb26008f KH |
3226 | if (p != overlay_str_buf + total) |
3227 | abort (); | |
bbbe9545 KH |
3228 | if (pstr) |
3229 | *pstr = overlay_str_buf; | |
e8185fa8 | 3230 | return total; |
bbbe9545 | 3231 | } |
e8185fa8 | 3232 | return 0; |
bbbe9545 KH |
3233 | } |
3234 | \f | |
5c4f68f1 | 3235 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3236 | |
2eec3b4e | 3237 | void |
d3da34e0 | 3238 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3239 | { |
2410d73a SM |
3240 | Lisp_Object overlay, beg, end; |
3241 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3242 | |
3243 | /* See if anything in overlays_before should move to overlays_after. */ | |
3244 | ||
3245 | /* We don't strictly need prev in this loop; it should always be nil. | |
3246 | But we use it for symmetry and in case that should cease to be true | |
3247 | with some future change. */ | |
2410d73a SM |
3248 | prev = NULL; |
3249 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3250 | { |
2410d73a SM |
3251 | next = tail->next; |
3252 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3253 | |
3254 | /* If the overlay is not valid, get rid of it. */ | |
3255 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3256 | #if 1 |
3257 | abort (); | |
3258 | #else | |
2eec3b4e RS |
3259 | { |
3260 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3261 | if (!NILP (prev)) | |
7539e11f | 3262 | XCDR (prev) = next; |
2eec3b4e | 3263 | else |
5c4f68f1 | 3264 | buf->overlays_before = next; |
2eec3b4e RS |
3265 | tail = prev; |
3266 | continue; | |
3267 | } | |
52f8ec73 | 3268 | #endif |
1ab256cb | 3269 | |
2eec3b4e RS |
3270 | beg = OVERLAY_START (overlay); |
3271 | end = OVERLAY_END (overlay); | |
1ab256cb | 3272 | |
2eec3b4e | 3273 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3274 | { |
2eec3b4e | 3275 | /* OVERLAY needs to be moved. */ |
145582a0 | 3276 | EMACS_INT where = OVERLAY_POSITION (beg); |
2410d73a | 3277 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3278 | |
3279 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3280 | if (prev) |
3281 | prev->next = next; | |
2eec3b4e | 3282 | else |
5c4f68f1 | 3283 | buf->overlays_before = next; |
2eec3b4e RS |
3284 | |
3285 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3286 | other_prev = NULL; |
3287 | for (other = buf->overlays_after; other; | |
3288 | other_prev = other, other = other->next) | |
1ab256cb | 3289 | { |
6af718a4 | 3290 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3291 | |
2410d73a SM |
3292 | XSETMISC (otheroverlay, other); |
3293 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3294 | |
3295 | otherbeg = OVERLAY_START (otheroverlay); | |
3296 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3297 | break; | |
1ab256cb | 3298 | } |
2eec3b4e RS |
3299 | |
3300 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3301 | tail->next = other; |
3302 | if (other_prev) | |
3303 | other_prev->next = tail; | |
1ab256cb | 3304 | else |
5c4f68f1 | 3305 | buf->overlays_after = tail; |
2eec3b4e | 3306 | tail = prev; |
1ab256cb | 3307 | } |
2eec3b4e RS |
3308 | else |
3309 | /* We've reached the things that should stay in overlays_before. | |
3310 | All the rest of overlays_before must end even earlier, | |
3311 | so stop now. */ | |
3312 | break; | |
3313 | } | |
3314 | ||
3315 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3316 | prev = NULL; |
3317 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3318 | { |
2410d73a SM |
3319 | next = tail->next; |
3320 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3321 | |
3322 | /* If the overlay is not valid, get rid of it. */ | |
3323 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3324 | #if 1 |
3325 | abort (); | |
3326 | #else | |
2eec3b4e RS |
3327 | { |
3328 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3329 | if (!NILP (prev)) | |
7539e11f | 3330 | XCDR (prev) = next; |
2eec3b4e | 3331 | else |
5c4f68f1 | 3332 | buf->overlays_after = next; |
2eec3b4e RS |
3333 | tail = prev; |
3334 | continue; | |
3335 | } | |
52f8ec73 | 3336 | #endif |
2eec3b4e RS |
3337 | |
3338 | beg = OVERLAY_START (overlay); | |
3339 | end = OVERLAY_END (overlay); | |
3340 | ||
3341 | /* Stop looking, when we know that nothing further | |
3342 | can possibly end before POS. */ | |
3343 | if (OVERLAY_POSITION (beg) > pos) | |
3344 | break; | |
3345 | ||
3346 | if (OVERLAY_POSITION (end) <= pos) | |
3347 | { | |
3348 | /* OVERLAY needs to be moved. */ | |
145582a0 | 3349 | EMACS_INT where = OVERLAY_POSITION (end); |
2410d73a | 3350 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3351 | |
3352 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3353 | if (prev) |
3354 | prev->next = next; | |
2eec3b4e | 3355 | else |
5c4f68f1 | 3356 | buf->overlays_after = next; |
2eec3b4e RS |
3357 | |
3358 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3359 | other_prev = NULL; |
3360 | for (other = buf->overlays_before; other; | |
3361 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3362 | { |
3363 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3364 | |
2410d73a SM |
3365 | XSETMISC (otheroverlay, other); |
3366 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3367 | |
3368 | otherend = OVERLAY_END (otheroverlay); | |
3369 | if (OVERLAY_POSITION (otherend) <= where) | |
3370 | break; | |
3371 | } | |
3372 | ||
3373 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3374 | tail->next = other; |
3375 | if (other_prev) | |
3376 | other_prev->next = tail; | |
2eec3b4e | 3377 | else |
5c4f68f1 | 3378 | buf->overlays_before = tail; |
2eec3b4e RS |
3379 | tail = prev; |
3380 | } | |
3381 | } | |
3382 | ||
c2d5b10f | 3383 | buf->overlay_center = pos; |
2eec3b4e | 3384 | } |
2b1bdf65 | 3385 | |
423cdb46 | 3386 | void |
d3da34e0 | 3387 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3388 | { |
3389 | /* After an insertion, the lists are still sorted properly, | |
3390 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3391 | if (current_buffer->overlay_center >= pos) |
3392 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3393 | } |
3394 | ||
3395 | void | |
d3da34e0 | 3396 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3397 | { |
c2d5b10f | 3398 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3399 | /* The deletion was to our right. No change needed; the before- and |
3400 | after-lists are still consistent. */ | |
3401 | ; | |
c2d5b10f | 3402 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3403 | /* The deletion was to our left. We need to adjust the center value |
3404 | to account for the change in position, but the lists are consistent | |
3405 | given the new value. */ | |
c2d5b10f | 3406 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3407 | else |
3408 | /* We're right in the middle. There might be things on the after-list | |
3409 | that now belong on the before-list. Recentering will move them, | |
3410 | and also update the center point. */ | |
3411 | recenter_overlay_lists (current_buffer, pos); | |
3412 | } | |
3413 | ||
2b1bdf65 KH |
3414 | /* Fix up overlays that were garbled as a result of permuting markers |
3415 | in the range START through END. Any overlay with at least one | |
3416 | endpoint in this range will need to be unlinked from the overlay | |
3417 | list and reinserted in its proper place. | |
3418 | Such an overlay might even have negative size at this point. | |
6b61353c | 3419 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3420 | void |
145582a0 | 3421 | fix_start_end_in_overlays (register EMACS_INT start, register EMACS_INT end) |
2b1bdf65 | 3422 | { |
6af718a4 | 3423 | Lisp_Object overlay; |
2410d73a | 3424 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3425 | /* These are either nil, indicating that before_list or after_list |
3426 | should be assigned, or the cons cell the cdr of which should be | |
3427 | assigned. */ | |
2410d73a | 3428 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3429 | /* 'Parent', likewise, indicates a cons cell or |
3430 | current_buffer->overlays_before or overlays_after, depending | |
3431 | which loop we're in. */ | |
2410d73a | 3432 | struct Lisp_Overlay *tail, *parent; |
145582a0 | 3433 | EMACS_INT startpos, endpos; |
2b1bdf65 KH |
3434 | |
3435 | /* This algorithm shifts links around instead of consing and GCing. | |
3436 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3437 | well-formed list except that its last element, the CDR of beforep |
3438 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3439 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3440 | that before_list isn't initialized, although it may look | |
3441 | strange. */ | |
2410d73a | 3442 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3443 | { |
2410d73a | 3444 | XSETMISC (overlay, tail); |
6b61353c | 3445 | |
2b1bdf65 | 3446 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3447 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3448 | ||
3449 | /* If the overlay is backwards, make it empty. */ | |
3450 | if (endpos < startpos) | |
3451 | { | |
3452 | startpos = endpos; | |
3453 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3454 | Qnil); | |
3455 | } | |
3456 | ||
2b1bdf65 KH |
3457 | if (endpos < start) |
3458 | break; | |
60ebfdf3 | 3459 | |
2b1bdf65 KH |
3460 | if (endpos < end |
3461 | || (startpos >= start && startpos < end)) | |
3462 | { | |
2b1bdf65 KH |
3463 | /* Add it to the end of the wrong list. Later on, |
3464 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3465 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3466 | { |
2410d73a | 3467 | if (!afterp) |
1138e742 KR |
3468 | after_list = tail; |
3469 | else | |
2410d73a | 3470 | afterp->next = tail; |
1138e742 | 3471 | afterp = tail; |
2b1bdf65 KH |
3472 | } |
3473 | else | |
3474 | { | |
2410d73a | 3475 | if (!beforep) |
1138e742 KR |
3476 | before_list = tail; |
3477 | else | |
2410d73a | 3478 | beforep->next = tail; |
1138e742 | 3479 | beforep = tail; |
2b1bdf65 | 3480 | } |
2410d73a SM |
3481 | if (!parent) |
3482 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3483 | else |
2410d73a SM |
3484 | parent->next = tail->next; |
3485 | tail = tail->next; | |
2b1bdf65 KH |
3486 | } |
3487 | else | |
2410d73a | 3488 | parent = tail, tail = parent->next; |
2b1bdf65 | 3489 | } |
2410d73a | 3490 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3491 | { |
2410d73a | 3492 | XSETMISC (overlay, tail); |
6b61353c | 3493 | |
2b1bdf65 | 3494 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3495 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3496 | ||
3497 | /* If the overlay is backwards, make it empty. */ | |
3498 | if (endpos < startpos) | |
3499 | { | |
3500 | startpos = endpos; | |
3501 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3502 | Qnil); |
6b61353c KH |
3503 | } |
3504 | ||
2b1bdf65 KH |
3505 | if (startpos >= end) |
3506 | break; | |
6b61353c | 3507 | |
2b1bdf65 KH |
3508 | if (startpos >= start |
3509 | || (endpos >= start && endpos < end)) | |
3510 | { | |
c2d5b10f | 3511 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3512 | { |
2410d73a | 3513 | if (!afterp) |
1138e742 KR |
3514 | after_list = tail; |
3515 | else | |
2410d73a | 3516 | afterp->next = tail; |
1138e742 | 3517 | afterp = tail; |
2b1bdf65 KH |
3518 | } |
3519 | else | |
3520 | { | |
2410d73a | 3521 | if (!beforep) |
1138e742 KR |
3522 | before_list = tail; |
3523 | else | |
2410d73a | 3524 | beforep->next = tail; |
1138e742 | 3525 | beforep = tail; |
2b1bdf65 | 3526 | } |
2410d73a SM |
3527 | if (!parent) |
3528 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3529 | else |
2410d73a SM |
3530 | parent->next = tail->next; |
3531 | tail = tail->next; | |
2b1bdf65 KH |
3532 | } |
3533 | else | |
2410d73a | 3534 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3535 | } |
3536 | ||
3537 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3538 | and let the recenter function make it sane again. */ | |
2410d73a | 3539 | if (beforep) |
1138e742 | 3540 | { |
2410d73a | 3541 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3542 | current_buffer->overlays_before = before_list; |
3543 | } | |
c2d5b10f | 3544 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3545 | |
2410d73a | 3546 | if (afterp) |
1138e742 | 3547 | { |
2410d73a | 3548 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3549 | current_buffer->overlays_after = after_list; |
3550 | } | |
c2d5b10f | 3551 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3552 | } |
3b06f880 KH |
3553 | |
3554 | /* We have two types of overlay: the one whose ending marker is | |
3555 | after-insertion-marker (this is the usual case) and the one whose | |
3556 | ending marker is before-insertion-marker. When `overlays_before' | |
3557 | contains overlays of the latter type and the former type in this | |
3558 | order and both overlays end at inserting position, inserting a text | |
3559 | increases only the ending marker of the latter type, which results | |
3560 | in incorrect ordering of `overlays_before'. | |
3561 | ||
3562 | This function fixes ordering of overlays in the slot | |
3563 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3564 | was at PREV, and now is at POS. */ | |
3565 | ||
01136e9b | 3566 | void |
d3da34e0 | 3567 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3568 | { |
2410d73a SM |
3569 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3570 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3571 | Lisp_Object tem; | |
c2d5b10f | 3572 | EMACS_INT end; |
3b06f880 KH |
3573 | |
3574 | /* After the insertion, the several overlays may be in incorrect | |
3575 | order. The possibility is that, in the list `overlays_before', | |
3576 | an overlay which ends at POS appears after an overlay which ends | |
3577 | at PREV. Since POS is greater than PREV, we must fix the | |
3578 | ordering of these overlays, by moving overlays ends at POS before | |
3579 | the overlays ends at PREV. */ | |
3580 | ||
3581 | /* At first, find a place where disordered overlays should be linked | |
3582 | in. It is where an overlay which end before POS exists. (i.e. an | |
3583 | overlay whose ending marker is after-insertion-marker if disorder | |
3584 | exists). */ | |
2410d73a SM |
3585 | while (tail |
3586 | && (XSETMISC (tem, tail), | |
3587 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3588 | { |
3589 | parent = tail; | |
2410d73a | 3590 | tail = tail->next; |
1138e742 | 3591 | } |
3b06f880 KH |
3592 | |
3593 | /* If we don't find such an overlay, | |
3594 | or the found one ends before PREV, | |
3595 | or the found one is the last one in the list, | |
3596 | we don't have to fix anything. */ | |
f93ad4cf | 3597 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3598 | return; |
3599 | ||
1138e742 KR |
3600 | right_pair = parent; |
3601 | parent = tail; | |
2410d73a | 3602 | tail = tail->next; |
3b06f880 | 3603 | |
1138e742 | 3604 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3605 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3606 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3607 | we found an overlay which ends before PREV, the remaining | |
3608 | overlays are in correct order. */ | |
2410d73a | 3609 | while (tail) |
3b06f880 | 3610 | { |
2410d73a SM |
3611 | XSETMISC (tem, tail); |
3612 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3613 | |
3614 | if (end == pos) | |
3615 | { /* This overlay is disordered. */ | |
2410d73a | 3616 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3617 | |
3618 | /* Unlink the found overlay. */ | |
2410d73a SM |
3619 | tail = found->next; |
3620 | parent->next = tail; | |
1138e742 KR |
3621 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3622 | and link it into the right place. */ | |
2410d73a | 3623 | if (!right_pair) |
1138e742 | 3624 | { |
2410d73a | 3625 | found->next = bp->overlays_before; |
1138e742 KR |
3626 | bp->overlays_before = found; |
3627 | } | |
3628 | else | |
3629 | { | |
2410d73a SM |
3630 | found->next = right_pair->next; |
3631 | right_pair->next = found; | |
1138e742 | 3632 | } |
3b06f880 KH |
3633 | } |
3634 | else if (end == prev) | |
1138e742 KR |
3635 | { |
3636 | parent = tail; | |
2410d73a | 3637 | tail = tail->next; |
1138e742 | 3638 | } |
3b06f880 KH |
3639 | else /* No more disordered overlay. */ |
3640 | break; | |
3641 | } | |
3642 | } | |
2eec3b4e | 3643 | \f |
52f8ec73 | 3644 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3645 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3646 | (Lisp_Object object) |
52f8ec73 JB |
3647 | { |
3648 | return (OVERLAYP (object) ? Qt : Qnil); | |
3649 | } | |
3650 | ||
acac2700 | 3651 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3652 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3653 | If omitted, BUFFER defaults to the current buffer. |
3654 | BEG and END may be integers or markers. | |
a625ee20 RS |
3655 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3656 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3657 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3658 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3659 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3660 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3661 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3662 | { |
3663 | Lisp_Object overlay; | |
5c4f68f1 | 3664 | struct buffer *b; |
2eec3b4e | 3665 | |
5c4f68f1 | 3666 | if (NILP (buffer)) |
67180c6a | 3667 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3668 | else |
b7826503 | 3669 | CHECK_BUFFER (buffer); |
883047b9 JB |
3670 | if (MARKERP (beg) |
3671 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3672 | error ("Marker points into wrong buffer"); | |
3673 | if (MARKERP (end) | |
3674 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3675 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3676 | |
b7826503 PJ |
3677 | CHECK_NUMBER_COERCE_MARKER (beg); |
3678 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3679 | |
883047b9 | 3680 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3681 | { |
c99fc30f KH |
3682 | Lisp_Object temp; |
3683 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3684 | } |
883047b9 JB |
3685 | |
3686 | b = XBUFFER (buffer); | |
3687 | ||
3688 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3689 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3690 | |
acac2700 RS |
3691 | if (!NILP (front_advance)) |
3692 | XMARKER (beg)->insertion_type = 1; | |
3693 | if (!NILP (rear_advance)) | |
3694 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3695 | |
48e2e3ba | 3696 | overlay = allocate_misc (); |
89ca3e1b | 3697 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3698 | XOVERLAY (overlay)->start = beg; |
3699 | XOVERLAY (overlay)->end = end; | |
3700 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3701 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3702 | |
177c0ea7 | 3703 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3704 | end = OVERLAY_END (overlay); |
c2d5b10f | 3705 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3706 | { |
3707 | if (b->overlays_after) | |
3708 | XOVERLAY (overlay)->next = b->overlays_after; | |
3709 | b->overlays_after = XOVERLAY (overlay); | |
3710 | } | |
2eec3b4e | 3711 | else |
2410d73a SM |
3712 | { |
3713 | if (b->overlays_before) | |
3714 | XOVERLAY (overlay)->next = b->overlays_before; | |
3715 | b->overlays_before = XOVERLAY (overlay); | |
3716 | } | |
2eec3b4e RS |
3717 | |
3718 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3719 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3720 | |
b61982dd JB |
3721 | /* We don't need to redisplay the region covered by the overlay, because |
3722 | the overlay has no properties at the moment. */ | |
3723 | ||
2eec3b4e RS |
3724 | return overlay; |
3725 | } | |
876aa27c RS |
3726 | \f |
3727 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3728 | ||
3729 | static void | |
d3da34e0 | 3730 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3731 | { |
876aa27c RS |
3732 | if (start > end) |
3733 | { | |
145582a0 | 3734 | EMACS_INT temp = start; |
26f545d7 GM |
3735 | start = end; |
3736 | end = temp; | |
876aa27c RS |
3737 | } |
3738 | ||
481b5054 | 3739 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3740 | |
876aa27c RS |
3741 | /* If this is a buffer not in the selected window, |
3742 | we must do other windows. */ | |
3743 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3744 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3745 | /* If multiple windows show this buffer, we must do other windows. */ |
3746 | else if (buffer_shared > 1) | |
3747 | windows_or_buffers_changed = 1; | |
18700091 KS |
3748 | /* If we modify an overlay at the end of the buffer, we cannot |
3749 | be sure that window end is still valid. */ | |
3750 | else if (end >= ZV && start <= ZV) | |
3751 | windows_or_buffers_changed = 1; | |
876aa27c | 3752 | |
d8b9150f | 3753 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3754 | } |
2eec3b4e | 3755 | |
018ba359 | 3756 | \f |
2410d73a | 3757 | static struct Lisp_Overlay * |
d3da34e0 | 3758 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3759 | { |
3760 | struct Lisp_Overlay *tmp, *prev; | |
3761 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3762 | if (tmp == overlay) | |
3763 | { | |
3764 | if (prev) | |
3765 | prev->next = tmp->next; | |
3766 | else | |
3767 | list = tmp->next; | |
3768 | overlay->next = NULL; | |
3769 | break; | |
3770 | } | |
3771 | return list; | |
3772 | } | |
3773 | ||
5c4f68f1 | 3774 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3775 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3776 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3777 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3778 | buffer. */) |
5842a27b | 3779 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3780 | { |
0a4469c9 RS |
3781 | struct buffer *b, *ob; |
3782 | Lisp_Object obuffer; | |
aed13378 | 3783 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3784 | |
b7826503 | 3785 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3786 | if (NILP (buffer)) |
3787 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3788 | if (NILP (buffer)) |
67180c6a | 3789 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3790 | CHECK_BUFFER (buffer); |
883047b9 JB |
3791 | |
3792 | if (MARKERP (beg) | |
3793 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3794 | error ("Marker points into wrong buffer"); | |
3795 | if (MARKERP (end) | |
3796 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3797 | error ("Marker points into wrong buffer"); | |
3798 | ||
b7826503 PJ |
3799 | CHECK_NUMBER_COERCE_MARKER (beg); |
3800 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3801 | |
9d7608b7 KH |
3802 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3803 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3804 | |
b61982dd JB |
3805 | if (XINT (beg) > XINT (end)) |
3806 | { | |
c99fc30f KH |
3807 | Lisp_Object temp; |
3808 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3809 | } |
3810 | ||
9d7608b7 KH |
3811 | specbind (Qinhibit_quit, Qt); |
3812 | ||
0a4469c9 | 3813 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3814 | b = XBUFFER (buffer); |
8801a864 | 3815 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3816 | |
c82ed728 | 3817 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3818 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3819 | { |
3820 | /* Redisplay where the overlay was. */ | |
3821 | if (!NILP (obuffer)) | |
3822 | { | |
145582a0 EZ |
3823 | EMACS_INT o_beg; |
3824 | EMACS_INT o_end; | |
50760c4a | 3825 | |
80509f2f RS |
3826 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3827 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3828 | |
2e34157c | 3829 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3830 | } |
3831 | ||
3832 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3833 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3834 | } |
c82ed728 JB |
3835 | else |
3836 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3837 | { | |
145582a0 | 3838 | EMACS_INT o_beg, o_end; |
c82ed728 | 3839 | |
80509f2f RS |
3840 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3841 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3842 | |
2e34157c RS |
3843 | if (o_beg == XINT (beg)) |
3844 | modify_overlay (b, o_end, XINT (end)); | |
3845 | else if (o_end == XINT (end)) | |
3846 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3847 | else |
3848 | { | |
2e34157c RS |
3849 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3850 | if (XINT (end) > o_end) o_end = XINT (end); | |
3851 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3852 | } |
3853 | } | |
b61982dd | 3854 | |
0a4469c9 RS |
3855 | if (!NILP (obuffer)) |
3856 | { | |
2410d73a SM |
3857 | ob->overlays_before |
3858 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3859 | ob->overlays_after | |
3860 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3861 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3862 | } |
5c4f68f1 JB |
3863 | |
3864 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3865 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3866 | |
177c0ea7 | 3867 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3868 | end = OVERLAY_END (overlay); |
c2d5b10f | 3869 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3870 | { |
8f924df7 KH |
3871 | XOVERLAY (overlay)->next = b->overlays_after; |
3872 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3873 | } |
2eec3b4e | 3874 | else |
2410d73a | 3875 | { |
8f924df7 KH |
3876 | XOVERLAY (overlay)->next = b->overlays_before; |
3877 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3878 | } |
2eec3b4e RS |
3879 | |
3880 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3881 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3882 | |
0a4469c9 | 3883 | return unbind_to (count, overlay); |
2eec3b4e RS |
3884 | } |
3885 | ||
3886 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3887 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3888 | (Lisp_Object overlay) |
2eec3b4e | 3889 | { |
0a4469c9 | 3890 | Lisp_Object buffer; |
5c4f68f1 | 3891 | struct buffer *b; |
aed13378 | 3892 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3893 | |
b7826503 | 3894 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3895 | |
0a4469c9 RS |
3896 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3897 | if (NILP (buffer)) | |
3898 | return Qnil; | |
3899 | ||
3900 | b = XBUFFER (buffer); | |
0a4469c9 | 3901 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3902 | |
2410d73a SM |
3903 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3904 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3905 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3906 | modify_overlay (b, |
8231a9aa RS |
3907 | marker_position (OVERLAY_START (overlay)), |
3908 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3909 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3910 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3911 | ||
e58c389d | 3912 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3913 | display optimizations for the affected buffer, on the basis that |
3914 | these strings may contain newlines. This is easier to do than to | |
3915 | check for that situation during redisplay. */ | |
3916 | if (!windows_or_buffers_changed | |
3917 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3918 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3919 | b->prevent_redisplay_optimizations_p = 1; | |
3920 | ||
0a4469c9 | 3921 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3922 | } |
3923 | \f | |
8ebafa8d JB |
3924 | /* Overlay dissection functions. */ |
3925 | ||
3926 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 | 3927 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3928 | (Lisp_Object overlay) |
8ebafa8d | 3929 | { |
b7826503 | 3930 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3931 | |
3932 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3933 | } | |
3934 | ||
3935 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 | 3936 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3937 | (Lisp_Object overlay) |
8ebafa8d | 3938 | { |
b7826503 | 3939 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3940 | |
3941 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3942 | } | |
3943 | ||
3944 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3945 | doc: /* Return the buffer OVERLAY belongs to. |
3946 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3947 | (Lisp_Object overlay) |
8ebafa8d | 3948 | { |
b7826503 | 3949 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3950 | |
3951 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3952 | } | |
3953 | ||
3954 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3955 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3956 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3957 | OVERLAY. */) |
5842a27b | 3958 | (Lisp_Object overlay) |
8ebafa8d | 3959 | { |
b7826503 | 3960 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3961 | |
48e2e3ba | 3962 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3963 | } |
3964 | ||
3965 | \f | |
2eec3b4e | 3966 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3967 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3968 | (Lisp_Object pos) |
2eec3b4e RS |
3969 | { |
3970 | int noverlays; | |
2eec3b4e RS |
3971 | Lisp_Object *overlay_vec; |
3972 | int len; | |
3973 | Lisp_Object result; | |
3974 | ||
b7826503 | 3975 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3976 | |
3977 | len = 10; | |
a9800ae8 | 3978 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3979 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3980 | ||
3981 | /* Put all the overlays we want in a vector in overlay_vec. | |
3982 | Store the length in len. */ | |
2a77a7d7 | 3983 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3984 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
3985 | |
3986 | /* Make a list of them all. */ | |
3987 | result = Flist (noverlays, overlay_vec); | |
3988 | ||
9ac0d9e0 | 3989 | xfree (overlay_vec); |
2eec3b4e RS |
3990 | return result; |
3991 | } | |
3992 | ||
74514898 | 3993 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3994 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3995 | Overlap means that at least one character is contained within the overlay |
3996 | and also contained within the specified region. | |
7723e095 MR |
3997 | Empty overlays are included in the result if they are located at BEG, |
3998 | between BEG and END, or at END provided END denotes the position at the | |
3999 | end of the buffer. */) | |
5842a27b | 4000 | (Lisp_Object beg, Lisp_Object end) |
74514898 RS |
4001 | { |
4002 | int noverlays; | |
4003 | Lisp_Object *overlay_vec; | |
4004 | int len; | |
4005 | Lisp_Object result; | |
4006 | ||
b7826503 PJ |
4007 | CHECK_NUMBER_COERCE_MARKER (beg); |
4008 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4009 | |
4010 | len = 10; | |
4011 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4012 | ||
4013 | /* Put all the overlays we want in a vector in overlay_vec. | |
4014 | Store the length in len. */ | |
4015 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 4016 | NULL, NULL); |
74514898 RS |
4017 | |
4018 | /* Make a list of them all. */ | |
4019 | result = Flist (noverlays, overlay_vec); | |
4020 | ||
4021 | xfree (overlay_vec); | |
4022 | return result; | |
4023 | } | |
4024 | ||
2eec3b4e | 4025 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4026 | 1, 1, 0, |
7ee72033 | 4027 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4028 | If there are no overlay boundaries from POS to (point-max), |
4029 | the value is (point-max). */) | |
5842a27b | 4030 | (Lisp_Object pos) |
2eec3b4e RS |
4031 | { |
4032 | int noverlays; | |
0f8b27ea | 4033 | EMACS_INT endpos; |
2eec3b4e RS |
4034 | Lisp_Object *overlay_vec; |
4035 | int len; | |
2eec3b4e RS |
4036 | int i; |
4037 | ||
b7826503 | 4038 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4039 | |
4040 | len = 10; | |
4041 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4042 | ||
4043 | /* Put all the overlays we want in a vector in overlay_vec. | |
4044 | Store the length in len. | |
4045 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4046 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4047 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4048 | |
4049 | /* If any of these overlays ends before endpos, | |
4050 | use its ending point instead. */ | |
4051 | for (i = 0; i < noverlays; i++) | |
4052 | { | |
4053 | Lisp_Object oend; | |
0f8b27ea | 4054 | EMACS_INT oendpos; |
2eec3b4e RS |
4055 | |
4056 | oend = OVERLAY_END (overlay_vec[i]); | |
4057 | oendpos = OVERLAY_POSITION (oend); | |
4058 | if (oendpos < endpos) | |
4059 | endpos = oendpos; | |
1ab256cb RM |
4060 | } |
4061 | ||
9ac0d9e0 | 4062 | xfree (overlay_vec); |
2eec3b4e RS |
4063 | return make_number (endpos); |
4064 | } | |
239c932b RS |
4065 | |
4066 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4067 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4068 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4069 | If there are no overlay boundaries from (point-min) to POS, |
4070 | the value is (point-min). */) | |
5842a27b | 4071 | (Lisp_Object pos) |
239c932b RS |
4072 | { |
4073 | int noverlays; | |
0f8b27ea | 4074 | EMACS_INT prevpos; |
239c932b RS |
4075 | Lisp_Object *overlay_vec; |
4076 | int len; | |
239c932b | 4077 | |
b7826503 | 4078 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4079 | |
624bbdc4 RS |
4080 | /* At beginning of buffer, we know the answer; |
4081 | avoid bug subtracting 1 below. */ | |
4082 | if (XINT (pos) == BEGV) | |
4083 | return pos; | |
4084 | ||
017f0539 GM |
4085 | len = 10; |
4086 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4087 | ||
239c932b RS |
4088 | /* Put all the overlays we want in a vector in overlay_vec. |
4089 | Store the length in len. | |
daa1c109 | 4090 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4091 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4092 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4093 | |
239c932b RS |
4094 | xfree (overlay_vec); |
4095 | return make_number (prevpos); | |
4096 | } | |
2eec3b4e RS |
4097 | \f |
4098 | /* These functions are for debugging overlays. */ | |
4099 | ||
4100 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4101 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4102 | The car has all the overlays before the overlay center; |
4103 | the cdr has all the overlays after the overlay center. | |
4104 | Recentering overlays moves overlays between these lists. | |
4105 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4106 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4107 | (void) |
2eec3b4e | 4108 | { |
2410d73a SM |
4109 | struct Lisp_Overlay *ol; |
4110 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4111 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4112 | { | |
4113 | XSETMISC (tmp, ol); | |
4114 | before = Fcons (tmp, before); | |
4115 | } | |
4116 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4117 | { | |
4118 | XSETMISC (tmp, ol); | |
4119 | after = Fcons (tmp, after); | |
4120 | } | |
4121 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4122 | } |
4123 | ||
4124 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4125 | doc: /* Recenter the overlays of the current buffer around position POS. |
4126 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4127 | for positions far away from POS). */) | |
5842a27b | 4128 | (Lisp_Object pos) |
2eec3b4e | 4129 | { |
b7826503 | 4130 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4131 | |
5c4f68f1 | 4132 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4133 | return Qnil; |
4134 | } | |
4135 | \f | |
4136 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 | 4137 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4138 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4139 | { |
b7826503 | 4140 | CHECK_OVERLAY (overlay); |
9a593927 | 4141 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4142 | } |
4143 | ||
4144 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 | 4145 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
5842a27b | 4146 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4147 | { |
48e2e3ba | 4148 | Lisp_Object tail, buffer; |
9d7608b7 | 4149 | int changed; |
2eec3b4e | 4150 | |
b7826503 | 4151 | CHECK_OVERLAY (overlay); |
b61982dd | 4152 | |
274a9425 RS |
4153 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4154 | ||
48e2e3ba | 4155 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4156 | CONSP (tail) && CONSP (XCDR (tail)); |
4157 | tail = XCDR (XCDR (tail))) | |
4158 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4159 | { |
7539e11f | 4160 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4161 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4162 | goto found; |
274a9425 | 4163 | } |
9d7608b7 KH |
4164 | /* It wasn't in the list, so add it to the front. */ |
4165 | changed = !NILP (value); | |
48e2e3ba KH |
4166 | XOVERLAY (overlay)->plist |
4167 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4168 | found: |
4169 | if (! NILP (buffer)) | |
4170 | { | |
4171 | if (changed) | |
876aa27c | 4172 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4173 | marker_position (OVERLAY_START (overlay)), |
4174 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4175 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4176 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4177 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4178 | Fdelete_overlay (overlay); | |
4179 | } | |
7d63db98 | 4180 | |
2eec3b4e | 4181 | return value; |
1ab256cb RM |
4182 | } |
4183 | \f | |
9115729e KH |
4184 | /* Subroutine of report_overlay_modification. */ |
4185 | ||
4186 | /* Lisp vector holding overlay hook functions to call. | |
4187 | Vector elements come in pairs. | |
4188 | Each even-index element is a list of hook functions. | |
4189 | The following odd-index element is the overlay they came from. | |
4190 | ||
4191 | Before the buffer change, we fill in this vector | |
4192 | as we call overlay hook functions. | |
4193 | After the buffer change, we get the functions to call from this vector. | |
4194 | This way we always call the same functions before and after the change. */ | |
4195 | static Lisp_Object last_overlay_modification_hooks; | |
4196 | ||
4197 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4198 | static int last_overlay_modification_hooks_used; | |
4199 | ||
4200 | /* Add one functionlist/overlay pair | |
4201 | to the end of last_overlay_modification_hooks. */ | |
4202 | ||
4203 | static void | |
d3da34e0 | 4204 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e KH |
4205 | { |
4206 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4207 | ||
4208 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4209 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4210 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4211 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4212 | functionlist); last_overlay_modification_hooks_used++; | |
4213 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4214 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4215 | } |
4216 | \f | |
173f2a64 RS |
4217 | /* Run the modification-hooks of overlays that include |
4218 | any part of the text in START to END. | |
9115729e KH |
4219 | If this change is an insertion, also |
4220 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4221 | and the insert-after-hooks of overlay ending at START. |
4222 | ||
4223 | This is called both before and after the modification. | |
4224 | AFTER is nonzero when we call after the modification. | |
4225 | ||
9115729e KH |
4226 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4227 | When AFTER is nonzero, they are the start position, | |
4228 | the position after the inserted new text, | |
4229 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4230 | |
4231 | void | |
d3da34e0 JB |
4232 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4233 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4234 | { |
2410d73a SM |
4235 | Lisp_Object prop, overlay; |
4236 | struct Lisp_Overlay *tail; | |
9115729e KH |
4237 | /* 1 if this change is an insertion. */ |
4238 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4239 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4240 | |
4241 | overlay = Qnil; | |
2410d73a | 4242 | tail = NULL; |
9115729e | 4243 | |
27c6b98e SM |
4244 | /* We used to run the functions as soon as we found them and only register |
4245 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4246 | case. But running elisp code as we traverse the list of overlays is | |
4247 | painful because the list can be modified by the elisp code so we had to | |
4248 | copy at several places. We now simply do a read-only traversal that | |
4249 | only collects the functions to run and we run them afterwards. It's | |
4250 | simpler, especially since all the code was already there. -stef */ | |
4251 | ||
a615c6dc | 4252 | if (!after) |
173f2a64 | 4253 | { |
a615c6dc SM |
4254 | /* We are being called before a change. |
4255 | Scan the overlays to find the functions to call. */ | |
4256 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4257 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4258 | { |
145582a0 | 4259 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4260 | Lisp_Object ostart, oend; |
4261 | ||
2410d73a | 4262 | XSETMISC (overlay, tail); |
a615c6dc SM |
4263 | |
4264 | ostart = OVERLAY_START (overlay); | |
4265 | oend = OVERLAY_END (overlay); | |
4266 | endpos = OVERLAY_POSITION (oend); | |
4267 | if (XFASTINT (start) > endpos) | |
4268 | break; | |
4269 | startpos = OVERLAY_POSITION (ostart); | |
4270 | if (insertion && (XFASTINT (start) == startpos | |
4271 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4272 | { |
a615c6dc SM |
4273 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4274 | if (!NILP (prop)) | |
4275 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4276 | } |
a615c6dc SM |
4277 | if (insertion && (XFASTINT (start) == endpos |
4278 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4279 | { |
a615c6dc SM |
4280 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4281 | if (!NILP (prop)) | |
4282 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4283 | } |
a615c6dc SM |
4284 | /* Test for intersecting intervals. This does the right thing |
4285 | for both insertion and deletion. */ | |
4286 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4287 | { |
a615c6dc SM |
4288 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4289 | if (!NILP (prop)) | |
4290 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4291 | } |
173f2a64 | 4292 | } |
60ebfdf3 | 4293 | |
2410d73a | 4294 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4295 | { |
145582a0 | 4296 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4297 | Lisp_Object ostart, oend; |
4298 | ||
2410d73a | 4299 | XSETMISC (overlay, tail); |
a615c6dc SM |
4300 | |
4301 | ostart = OVERLAY_START (overlay); | |
4302 | oend = OVERLAY_END (overlay); | |
4303 | startpos = OVERLAY_POSITION (ostart); | |
4304 | endpos = OVERLAY_POSITION (oend); | |
4305 | if (XFASTINT (end) < startpos) | |
4306 | break; | |
4307 | if (insertion && (XFASTINT (start) == startpos | |
4308 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4309 | { |
a615c6dc SM |
4310 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4311 | if (!NILP (prop)) | |
4312 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4313 | } |
a615c6dc SM |
4314 | if (insertion && (XFASTINT (start) == endpos |
4315 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4316 | { |
a615c6dc SM |
4317 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4318 | if (!NILP (prop)) | |
4319 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4320 | } |
a615c6dc SM |
4321 | /* Test for intersecting intervals. This does the right thing |
4322 | for both insertion and deletion. */ | |
4323 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4324 | { |
a615c6dc SM |
4325 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4326 | if (!NILP (prop)) | |
4327 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4328 | } |
173f2a64 RS |
4329 | } |
4330 | } | |
55b48893 | 4331 | |
a615c6dc SM |
4332 | GCPRO4 (overlay, arg1, arg2, arg3); |
4333 | { | |
4334 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4335 | First copy the vector contents, in case some of these hooks | |
4336 | do subsequent modification of the buffer. */ | |
4337 | int size = last_overlay_modification_hooks_used; | |
4338 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4339 | int i; | |
4340 | ||
72af86bd AS |
4341 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4342 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4343 | gcpro1.var = copy; |
4344 | gcpro1.nvars = size; | |
4345 | ||
4346 | for (i = 0; i < size;) | |
4347 | { | |
4348 | Lisp_Object prop, overlay; | |
4349 | prop = copy[i++]; | |
4350 | overlay = copy[i++]; | |
4351 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4352 | } | |
4353 | } | |
55b48893 | 4354 | UNGCPRO; |
173f2a64 RS |
4355 | } |
4356 | ||
4357 | static void | |
d3da34e0 JB |
4358 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4359 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4360 | { |
930a9140 | 4361 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4362 | |
930a9140 | 4363 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4364 | |
6d70a280 | 4365 | while (CONSP (list)) |
173f2a64 | 4366 | { |
930a9140 | 4367 | if (NILP (arg3)) |
6d70a280 | 4368 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4369 | else |
6d70a280 SM |
4370 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4371 | list = XCDR (list); | |
173f2a64 RS |
4372 | } |
4373 | UNGCPRO; | |
4374 | } | |
9d7608b7 KH |
4375 | |
4376 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4377 | property is set. */ | |
4378 | void | |
d3da34e0 | 4379 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4380 | { |
2410d73a SM |
4381 | Lisp_Object overlay, hit_list; |
4382 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4383 | |
4384 | hit_list = Qnil; | |
c2d5b10f | 4385 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4386 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4387 | { |
145582a0 | 4388 | EMACS_INT endpos; |
2410d73a | 4389 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4390 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4391 | if (endpos < pos) | |
4392 | break; | |
4393 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4394 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4395 | hit_list = Fcons (overlay, hit_list); |
4396 | } | |
4397 | else | |
2410d73a | 4398 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4399 | { |
145582a0 | 4400 | EMACS_INT startpos; |
2410d73a | 4401 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4402 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4403 | if (startpos > pos) | |
4404 | break; | |
4405 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4406 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4407 | hit_list = Fcons (overlay, hit_list); |
4408 | } | |
7539e11f KR |
4409 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4410 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4411 | } |
173f2a64 | 4412 | \f |
54dfdeb0 | 4413 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4414 | in the slot with offset OFFSET. */ |
4415 | ||
0fa3ba92 | 4416 | void |
d3da34e0 | 4417 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4418 | { |
ad97b375 | 4419 | Lisp_Object predicate; |
177c0ea7 | 4420 | |
64e16c3c | 4421 | switch (type) |
0fa3ba92 | 4422 | { |
2de9f71c | 4423 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4424 | case Lisp_String: predicate = Qstringp; break; |
4425 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4426 | default: abort (); | |
0fa3ba92 JB |
4427 | } |
4428 | ||
ad97b375 | 4429 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4430 | } |
7c02e886 | 4431 | |
0fa3ba92 | 4432 | \f |
b86af064 GM |
4433 | /*********************************************************************** |
4434 | Allocation with mmap | |
4435 | ***********************************************************************/ | |
4436 | ||
4437 | #ifdef USE_MMAP_FOR_BUFFERS | |
4438 | ||
4439 | #include <sys/types.h> | |
4440 | #include <sys/mman.h> | |
4441 | ||
4442 | #ifndef MAP_ANON | |
4443 | #ifdef MAP_ANONYMOUS | |
4444 | #define MAP_ANON MAP_ANONYMOUS | |
4445 | #else | |
4446 | #define MAP_ANON 0 | |
4447 | #endif | |
4448 | #endif | |
4449 | ||
09dfdf85 GM |
4450 | #ifndef MAP_FAILED |
4451 | #define MAP_FAILED ((void *) -1) | |
4452 | #endif | |
4453 | ||
b86af064 | 4454 | #include <stdio.h> |
b86af064 GM |
4455 | |
4456 | #if MAP_ANON == 0 | |
4457 | #include <fcntl.h> | |
4458 | #endif | |
4459 | ||
4460 | #include "coding.h" | |
4461 | ||
4462 | ||
4463 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4464 | The current implementation lets the system select mapped | |
4465 | addresses; we're not using MAP_FIXED in general, except when | |
4466 | trying to enlarge regions. | |
4467 | ||
4468 | Each mapped region starts with a mmap_region structure, the user | |
4469 | area starts after that structure, aligned to MEM_ALIGN. | |
4470 | ||
4471 | +-----------------------+ | |
4472 | | struct mmap_info + | | |
4473 | | padding | | |
4474 | +-----------------------+ | |
4475 | | user data | | |
4476 | | | | |
4477 | | | | |
4478 | +-----------------------+ */ | |
4479 | ||
4480 | struct mmap_region | |
4481 | { | |
4482 | /* User-specified size. */ | |
4483 | size_t nbytes_specified; | |
177c0ea7 | 4484 | |
b86af064 GM |
4485 | /* Number of bytes mapped */ |
4486 | size_t nbytes_mapped; | |
4487 | ||
4488 | /* Pointer to the location holding the address of the memory | |
4489 | allocated with the mmap'd block. The variable actually points | |
4490 | after this structure. */ | |
4491 | POINTER_TYPE **var; | |
4492 | ||
4493 | /* Next and previous in list of all mmap'd regions. */ | |
4494 | struct mmap_region *next, *prev; | |
4495 | }; | |
4496 | ||
4497 | /* Doubly-linked list of mmap'd regions. */ | |
4498 | ||
4499 | static struct mmap_region *mmap_regions; | |
4500 | ||
4501 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4502 | /dev/zero will be opened on it. */ | |
4503 | ||
4504 | static int mmap_fd; | |
4505 | ||
4506 | /* Temporary storage for mmap_set_vars, see there. */ | |
4507 | ||
4508 | static struct mmap_region *mmap_regions_1; | |
4509 | static int mmap_fd_1; | |
4510 | ||
4511 | /* Page size on this system. */ | |
4512 | ||
4513 | static int mmap_page_size; | |
4514 | ||
4515 | /* 1 means mmap has been intialized. */ | |
4516 | ||
4517 | static int mmap_initialized_p; | |
4518 | ||
4519 | /* Value is X rounded up to the next multiple of N. */ | |
4520 | ||
4521 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4522 | ||
4523 | /* Size of mmap_region structure plus padding. */ | |
4524 | ||
4525 | #define MMAP_REGION_STRUCT_SIZE \ | |
4526 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4527 | ||
4528 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4529 | region, return a pointer to the start of the region. */ | |
4530 | ||
4531 | #define MMAP_REGION(P) \ | |
4532 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4533 | ||
4534 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4535 | to the start of the user-visible part of the region. */ | |
4536 | ||
4537 | #define MMAP_USER_AREA(P) \ | |
4538 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4539 | ||
4540 | #define MEM_ALIGN sizeof (double) | |
4541 | ||
7273faa1 DL |
4542 | /* Predicate returning true if part of the address range [START .. END] |
4543 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4544 | memory mapping. |
4545 | ||
4546 | Default is to conservativly assume the address range is occupied by | |
4547 | something else. This can be overridden by system configuration | |
4548 | files if system-specific means to determine this exists. */ | |
4549 | ||
4550 | #ifndef MMAP_ALLOCATED_P | |
4551 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4552 | #endif | |
4553 | ||
b86af064 GM |
4554 | /* Function prototypes. */ |
4555 | ||
f57e2426 J |
4556 | static int mmap_free_1 (struct mmap_region *); |
4557 | static int mmap_enlarge (struct mmap_region *, int); | |
4558 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4559 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4560 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4561 | static void mmap_free (POINTER_TYPE **ptr); | |
4562 | static void mmap_init (void); | |
b86af064 GM |
4563 | |
4564 | ||
4565 | /* Return a region overlapping address range START...END, or null if | |
4566 | none. END is not including, i.e. the last byte in the range | |
4567 | is at END - 1. */ | |
4568 | ||
4569 | static struct mmap_region * | |
4570 | mmap_find (start, end) | |
4571 | POINTER_TYPE *start, *end; | |
4572 | { | |
4573 | struct mmap_region *r; | |
4574 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4575 | |
b86af064 GM |
4576 | for (r = mmap_regions; r; r = r->next) |
4577 | { | |
4578 | char *rstart = (char *) r; | |
4579 | char *rend = rstart + r->nbytes_mapped; | |
4580 | ||
4581 | if (/* First byte of range, i.e. START, in this region? */ | |
4582 | (s >= rstart && s < rend) | |
4583 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4584 | || (e > rstart && e <= rend) | |
4585 | /* First byte of this region in the range? */ | |
4586 | || (rstart >= s && rstart < e) | |
4587 | /* Last byte of this region in the range? */ | |
4588 | || (rend > s && rend <= e)) | |
4589 | break; | |
4590 | } | |
4591 | ||
4592 | return r; | |
4593 | } | |
4594 | ||
4595 | ||
4596 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4597 | the region. Value is non-zero if successful. */ | |
4598 | ||
4599 | static int | |
4600 | mmap_free_1 (r) | |
4601 | struct mmap_region *r; | |
4602 | { | |
4603 | if (r->next) | |
4604 | r->next->prev = r->prev; | |
4605 | if (r->prev) | |
4606 | r->prev->next = r->next; | |
4607 | else | |
4608 | mmap_regions = r->next; | |
177c0ea7 | 4609 | |
1a15cca0 | 4610 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4611 | { |
4612 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4613 | return 0; | |
4614 | } | |
4615 | ||
4616 | return 1; | |
4617 | } | |
4618 | ||
4619 | ||
4620 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4621 | Value is non-zero if successful. */ | |
4622 | ||
4623 | static int | |
4624 | mmap_enlarge (r, npages) | |
4625 | struct mmap_region *r; | |
4626 | int npages; | |
4627 | { | |
4628 | char *region_end = (char *) r + r->nbytes_mapped; | |
4629 | size_t nbytes; | |
4630 | int success = 0; | |
4631 | ||
4632 | if (npages < 0) | |
4633 | { | |
4634 | /* Unmap pages at the end of the region. */ | |
4635 | nbytes = - npages * mmap_page_size; | |
4636 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4637 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4638 | else | |
4639 | { | |
4640 | r->nbytes_mapped -= nbytes; | |
4641 | success = 1; | |
4642 | } | |
4643 | } | |
4644 | else if (npages > 0) | |
4645 | { | |
b86af064 | 4646 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4647 | |
b86af064 GM |
4648 | /* Try to map additional pages at the end of the region. We |
4649 | cannot do this if the address range is already occupied by | |
4650 | something else because mmap deletes any previous mapping. | |
4651 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4652 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4653 | { |
4654 | POINTER_TYPE *p; | |
177c0ea7 | 4655 | |
b86af064 GM |
4656 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4657 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4658 | if (p == MAP_FAILED) | |
edaa9aed | 4659 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4660 | else if (p != (POINTER_TYPE *) region_end) |
4661 | { | |
4662 | /* Kernels are free to choose a different address. In | |
4663 | that case, unmap what we've mapped above; we have | |
4664 | no use for it. */ | |
4665 | if (munmap (p, nbytes) == -1) | |
4666 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4667 | } | |
4668 | else | |
4669 | { | |
4670 | r->nbytes_mapped += nbytes; | |
4671 | success = 1; | |
4672 | } | |
4673 | } | |
4674 | } | |
4675 | ||
4676 | return success; | |
4677 | } | |
4678 | ||
4679 | ||
4680 | /* Set or reset variables holding references to mapped regions. If | |
4681 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4682 | non-zero, set all variables to the start of the user-areas | |
4683 | of mapped regions. | |
4684 | ||
4685 | This function is called from Fdump_emacs to ensure that the dumped | |
4686 | Emacs doesn't contain references to memory that won't be mapped | |
4687 | when Emacs starts. */ | |
4688 | ||
4689 | void | |
4690 | mmap_set_vars (restore_p) | |
4691 | int restore_p; | |
4692 | { | |
4693 | struct mmap_region *r; | |
4694 | ||
4695 | if (restore_p) | |
4696 | { | |
4697 | mmap_regions = mmap_regions_1; | |
4698 | mmap_fd = mmap_fd_1; | |
4699 | for (r = mmap_regions; r; r = r->next) | |
4700 | *r->var = MMAP_USER_AREA (r); | |
4701 | } | |
4702 | else | |
4703 | { | |
4704 | for (r = mmap_regions; r; r = r->next) | |
4705 | *r->var = NULL; | |
4706 | mmap_regions_1 = mmap_regions; | |
4707 | mmap_regions = NULL; | |
4708 | mmap_fd_1 = mmap_fd; | |
4709 | mmap_fd = -1; | |
4710 | } | |
4711 | } | |
4712 | ||
4713 | ||
4714 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4715 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4716 | address of some variable which will use the data area. | |
4717 | ||
4718 | The allocation of 0 bytes is valid. | |
4719 | ||
4720 | If we can't allocate the necessary memory, set *VAR to null, and | |
4721 | return null. */ | |
4722 | ||
4723 | static POINTER_TYPE * | |
4724 | mmap_alloc (var, nbytes) | |
4725 | POINTER_TYPE **var; | |
4726 | size_t nbytes; | |
4727 | { | |
4728 | void *p; | |
4729 | size_t map; | |
4730 | ||
4731 | mmap_init (); | |
4732 | ||
4733 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4734 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4735 | mmap_fd, 0); | |
177c0ea7 | 4736 | |
b86af064 GM |
4737 | if (p == MAP_FAILED) |
4738 | { | |
4739 | if (errno != ENOMEM) | |
4740 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4741 | p = NULL; | |
4742 | } | |
4743 | else | |
4744 | { | |
4745 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4746 | |
b86af064 GM |
4747 | r->nbytes_specified = nbytes; |
4748 | r->nbytes_mapped = map; | |
4749 | r->var = var; | |
4750 | r->prev = NULL; | |
4751 | r->next = mmap_regions; | |
4752 | if (r->next) | |
4753 | r->next->prev = r; | |
4754 | mmap_regions = r; | |
177c0ea7 | 4755 | |
b86af064 GM |
4756 | p = MMAP_USER_AREA (p); |
4757 | } | |
177c0ea7 | 4758 | |
b86af064 GM |
4759 | return *var = p; |
4760 | } | |
4761 | ||
4762 | ||
4763 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4764 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4765 | and return this value. If more memory cannot be allocated, then | |
4766 | leave *VAR unchanged, and return null. */ | |
4767 | ||
4768 | static POINTER_TYPE * | |
4769 | mmap_realloc (var, nbytes) | |
4770 | POINTER_TYPE **var; | |
4771 | size_t nbytes; | |
4772 | { | |
4773 | POINTER_TYPE *result; | |
177c0ea7 | 4774 | |
b86af064 GM |
4775 | mmap_init (); |
4776 | ||
4777 | if (*var == NULL) | |
4778 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4779 | else if (nbytes == 0) |
b86af064 GM |
4780 | { |
4781 | mmap_free (var); | |
4782 | result = mmap_alloc (var, nbytes); | |
4783 | } | |
4784 | else | |
4785 | { | |
4786 | struct mmap_region *r = MMAP_REGION (*var); | |
4787 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4788 | |
b86af064 GM |
4789 | if (room < nbytes) |
4790 | { | |
4791 | /* Must enlarge. */ | |
4792 | POINTER_TYPE *old_ptr = *var; | |
4793 | ||
4794 | /* Try to map additional pages at the end of the region. | |
4795 | If that fails, allocate a new region, copy data | |
4796 | from the old region, then free it. */ | |
4797 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4798 | / mmap_page_size))) | |
4799 | { | |
4800 | r->nbytes_specified = nbytes; | |
4801 | *var = result = old_ptr; | |
4802 | } | |
4803 | else if (mmap_alloc (var, nbytes)) | |
4804 | { | |
72af86bd | 4805 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4806 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4807 | result = *var; | |
4808 | r = MMAP_REGION (result); | |
4809 | r->nbytes_specified = nbytes; | |
4810 | } | |
4811 | else | |
4812 | { | |
4813 | *var = old_ptr; | |
4814 | result = NULL; | |
4815 | } | |
4816 | } | |
4817 | else if (room - nbytes >= mmap_page_size) | |
4818 | { | |
4819 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4820 | memory back to the system. |
4821 | ||
4822 | The extra parens are to make the division happens first, | |
4823 | on positive values, so we know it will round towards | |
4824 | zero. */ | |
bb63c5c9 | 4825 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4826 | result = *var; |
4827 | r->nbytes_specified = nbytes; | |
4828 | } | |
4829 | else | |
4830 | { | |
4831 | /* Leave it alone. */ | |
4832 | result = *var; | |
4833 | r->nbytes_specified = nbytes; | |
4834 | } | |
4835 | } | |
4836 | ||
4837 | return result; | |
4838 | } | |
4839 | ||
4840 | ||
4841 | /* Free a block of relocatable storage whose data is pointed to by | |
4842 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4843 | ||
4844 | static void | |
4845 | mmap_free (var) | |
4846 | POINTER_TYPE **var; | |
4847 | { | |
4848 | mmap_init (); | |
177c0ea7 | 4849 | |
b86af064 GM |
4850 | if (*var) |
4851 | { | |
4852 | mmap_free_1 (MMAP_REGION (*var)); | |
4853 | *var = NULL; | |
4854 | } | |
4855 | } | |
4856 | ||
4857 | ||
4858 | /* Perform necessary intializations for the use of mmap. */ | |
4859 | ||
4860 | static void | |
4861 | mmap_init () | |
4862 | { | |
4863 | #if MAP_ANON == 0 | |
4864 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4865 | in a dumped Emacs. */ | |
4866 | if (mmap_fd <= 0) | |
4867 | { | |
4868 | /* No anonymous mmap -- we need the file descriptor. */ | |
4869 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4870 | if (mmap_fd == -1) | |
4871 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4872 | } | |
4873 | #endif /* MAP_ANON == 0 */ | |
4874 | ||
4875 | if (mmap_initialized_p) | |
4876 | return; | |
4877 | mmap_initialized_p = 1; | |
177c0ea7 | 4878 | |
b86af064 GM |
4879 | #if MAP_ANON != 0 |
4880 | mmap_fd = -1; | |
4881 | #endif | |
177c0ea7 | 4882 | |
b86af064 GM |
4883 | mmap_page_size = getpagesize (); |
4884 | } | |
4885 | ||
4886 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4887 | ||
4888 | ||
4889 | \f | |
4890 | /*********************************************************************** | |
4891 | Buffer-text Allocation | |
4892 | ***********************************************************************/ | |
4893 | ||
4894 | #ifdef REL_ALLOC | |
f57e2426 J |
4895 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4896 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4897 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4898 | #endif /* REL_ALLOC */ |
4899 | ||
4900 | ||
4901 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4902 | ||
4903 | static void | |
d3da34e0 | 4904 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4905 | { |
4906 | POINTER_TYPE *p; | |
177c0ea7 | 4907 | |
b86af064 GM |
4908 | BLOCK_INPUT; |
4909 | #if defined USE_MMAP_FOR_BUFFERS | |
4910 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4911 | #elif defined REL_ALLOC | |
4912 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4913 | #else | |
815add84 | 4914 | p = xmalloc (nbytes); |
b86af064 | 4915 | #endif |
177c0ea7 | 4916 | |
b86af064 GM |
4917 | if (p == NULL) |
4918 | { | |
4919 | UNBLOCK_INPUT; | |
4920 | memory_full (); | |
4921 | } | |
4922 | ||
4923 | b->text->beg = (unsigned char *) p; | |
4924 | UNBLOCK_INPUT; | |
4925 | } | |
4926 | ||
4927 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4928 | shrink it. */ | |
4929 | ||
4930 | void | |
5371d722 | 4931 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4932 | { |
4933 | POINTER_TYPE *p; | |
4934 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4935 | + delta); | |
4936 | BLOCK_INPUT; | |
4937 | #if defined USE_MMAP_FOR_BUFFERS | |
4938 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4939 | #elif defined REL_ALLOC | |
4940 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4941 | #else | |
4942 | p = xrealloc (b->text->beg, nbytes); | |
4943 | #endif | |
177c0ea7 | 4944 | |
b86af064 GM |
4945 | if (p == NULL) |
4946 | { | |
4947 | UNBLOCK_INPUT; | |
4948 | memory_full (); | |
4949 | } | |
4950 | ||
4951 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4952 | UNBLOCK_INPUT; | |
4953 | } | |
4954 | ||
4955 | ||
4956 | /* Free buffer B's text buffer. */ | |
4957 | ||
4958 | static void | |
d3da34e0 | 4959 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4960 | { |
4961 | BLOCK_INPUT; | |
4962 | ||
4963 | #if defined USE_MMAP_FOR_BUFFERS | |
4964 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4965 | #elif defined REL_ALLOC | |
4966 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4967 | #else | |
4968 | xfree (b->text->beg); | |
4969 | #endif | |
177c0ea7 | 4970 | |
b86af064 GM |
4971 | BUF_BEG_ADDR (b) = NULL; |
4972 | UNBLOCK_INPUT; | |
4973 | } | |
4974 | ||
4975 | ||
4976 | \f | |
4977 | /*********************************************************************** | |
4978 | Initialization | |
4979 | ***********************************************************************/ | |
4980 | ||
dfcf069d | 4981 | void |
d3da34e0 | 4982 | init_buffer_once (void) |
1ab256cb | 4983 | { |
7c02e886 GM |
4984 | int idx; |
4985 | ||
72af86bd | 4986 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4987 | |
1ab256cb RM |
4988 | /* Make sure all markable slots in buffer_defaults |
4989 | are initialized reasonably, so mark_buffer won't choke. */ | |
4990 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4991 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4992 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4993 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4994 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4995 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4996 | /* Prevent GC from getting confused. */ |
4997 | buffer_defaults.text = &buffer_defaults.own_text; | |
4998 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4999 | BUF_INTERVALS (&buffer_defaults) = 0; |
5000 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5001 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5002 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5003 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5004 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5005 | |
5006 | /* Set up the default values of various buffer slots. */ | |
5007 | /* Must do these before making the first buffer! */ | |
5008 | ||
f532dca0 | 5009 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
5010 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
5011 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
5012 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
5013 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
5014 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
5015 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
5016 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 5017 | #ifndef old |
4b4deea2 | 5018 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 5019 | #endif |
4b4deea2 TT |
5020 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
5021 | BVAR (&buffer_defaults, display_table) = Qnil; | |
5022 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
5023 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
5024 | BVAR (&buffer_defaults, file_format) = Qnil; | |
5025 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
5026 | buffer_defaults.overlays_before = NULL; |
5027 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5028 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5029 | |
4b4deea2 TT |
5030 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
5031 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
5032 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
5033 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
5034 | BVAR (&buffer_defaults, bidi_display_reordering) = Qnil; | |
5035 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; | |
5036 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
5037 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
5038 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 5039 | |
4b4deea2 TT |
5040 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
5041 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
5042 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
5043 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
5044 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
5045 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
5046 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
5047 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5048 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
5049 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
5050 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
5051 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
5052 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
5053 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
5054 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
5055 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
5056 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
5057 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
5058 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
5059 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
5060 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
5061 | |
5062 | /* Assign the local-flags to the slots that have default values. | |
5063 | The local flag is a bit that is used in the buffer | |
5064 | to say that it has its own local value for the slot. | |
5065 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5066 | ||
5067 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5068 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5069 | |
5070 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5071 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
5072 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
5073 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
5074 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
5075 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
5076 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
5077 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
5078 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
5079 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
5080 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
5081 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
5082 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
5083 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
5084 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
5085 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
5086 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
5087 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
5088 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
5089 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 5090 | |
7c02e886 | 5091 | idx = 1; |
4b4deea2 TT |
5092 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5093 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5094 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5095 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5096 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5097 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 5098 | #ifndef old |
4b4deea2 | 5099 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
1ab256cb | 5100 | #endif |
4b4deea2 TT |
5101 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5102 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5103 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5104 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5105 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5106 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5107 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5108 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5109 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5110 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5111 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5112 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5113 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5114 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5115 | /* Make this one a permanent local. */ |
7c02e886 | 5116 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5117 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5118 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5119 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5120 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5121 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5122 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5123 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5124 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5125 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5126 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5127 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5128 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5129 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5130 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5131 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5132 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5133 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5134 | |
5135 | /* Need more room? */ | |
7313acd0 | 5136 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5137 | abort (); |
7313acd0 | 5138 | last_per_buffer_idx = idx; |
177c0ea7 | 5139 | |
1ab256cb RM |
5140 | Vbuffer_alist = Qnil; |
5141 | current_buffer = 0; | |
5142 | all_buffers = 0; | |
5143 | ||
f4265f6c | 5144 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5145 | |
d67b4f80 | 5146 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5147 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5148 | |
d67b4f80 | 5149 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5150 | |
d67b4f80 | 5151 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5152 | |
d67b4f80 | 5153 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5154 | |
d67b4f80 | 5155 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5156 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5157 | |
d67b4f80 | 5158 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5159 | |
1ab256cb | 5160 | /* super-magic invisible buffer */ |
d67b4f80 | 5161 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5162 | Vbuffer_alist = Qnil; |
5163 | ||
d67b4f80 | 5164 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5165 | |
5166 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5167 | } |
5168 | ||
dfcf069d | 5169 | void |
d3da34e0 | 5170 | init_buffer (void) |
1ab256cb | 5171 | { |
2381d133 | 5172 | char *pwd; |
136351b7 | 5173 | Lisp_Object temp; |
b639c9be | 5174 | int len; |
1ab256cb | 5175 | |
b86af064 | 5176 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5177 | { |
5178 | /* When using the ralloc implementation based on mmap(2), buffer | |
5179 | text pointers will have been set to null in the dumped Emacs. | |
5180 | Map new memory. */ | |
5181 | struct buffer *b; | |
177c0ea7 | 5182 | |
93c27ef1 GM |
5183 | for (b = all_buffers; b; b = b->next) |
5184 | if (b->text->beg == NULL) | |
b86af064 | 5185 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5186 | } |
b86af064 | 5187 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5188 | |
1ab256cb | 5189 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5190 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5191 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5192 | |
01537133 | 5193 | pwd = get_current_dir_name (); |
a17b5ed1 | 5194 | |
156bdb41 | 5195 | if (!pwd) |
a17b5ed1 | 5196 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5197 | |
1ab256cb RM |
5198 | /* Maybe this should really use some standard subroutine |
5199 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5200 | len = strlen (pwd); |
5201 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5202 | { |
156bdb41 | 5203 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5204 | pwd = (char *) realloc (pwd, len + 2); |
5205 | if (!pwd) | |
5206 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5207 | pwd[len] = DIRECTORY_SEP; |
5208 | pwd[len + 1] = '\0'; | |
f7975d07 | 5209 | } |
0995fa35 | 5210 | |
4b4deea2 TT |
5211 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5212 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5213 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5214 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5215 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5216 | BVAR (current_buffer, directory) |
5217 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5218 | |
0995fa35 RS |
5219 | /* Add /: to the front of the name |
5220 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5221 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5222 | if (! NILP (temp) |
5223 | /* If the default dir is just /, TEMP is non-nil | |
5224 | because of the ange-ftp completion handler. | |
5225 | However, it is not necessary to turn / into /:/. | |
5226 | So avoid doing that. */ | |
4b4deea2 TT |
5227 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5228 | BVAR (current_buffer, directory) | |
5229 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5230 | |
136351b7 | 5231 | temp = get_minibuffer (0); |
4b4deea2 | 5232 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5233 | |
5234 | free (pwd); | |
1ab256cb RM |
5235 | } |
5236 | ||
d6aa1876 SM |
5237 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5238 | Object stored in the current buffer. address is the address of the slot | |
5239 | in the buffer that is current now. */ | |
5240 | ||
5241 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5242 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5243 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5244 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5245 | VNAME is the name of the buffer slot. |
5246 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5247 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5248 | do { \ | |
5249 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5250 | defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \ | |
5251 | } while (0) | |
d6aa1876 SM |
5252 | |
5253 | static void | |
8ea90aa3 | 5254 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
d3da34e0 | 5255 | Lisp_Object *address, Lisp_Object type, char *doc) |
d6aa1876 | 5256 | { |
ce5b453a | 5257 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5258 | int offset; |
5259 | ||
ce5b453a | 5260 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5261 | offset = (char *)address - (char *)current_buffer; |
5262 | ||
ce5b453a SM |
5263 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5264 | bo_fwd->offset = offset; | |
5265 | bo_fwd->slottype = type; | |
5266 | sym->redirect = SYMBOL_FORWARDED; | |
5267 | { | |
5268 | /* I tried to do the job without a cast, but it seems impossible. | |
5269 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5270 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5271 | } | |
5272 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5273 | |
5274 | if (PER_BUFFER_IDX (offset) == 0) | |
5275 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5276 | slot of buffer_local_flags */ | |
5277 | abort (); | |
5278 | } | |
5279 | ||
5280 | ||
1ab256cb | 5281 | /* initialize the buffer routines */ |
dfcf069d | 5282 | void |
d3da34e0 | 5283 | syms_of_buffer (void) |
1ab256cb | 5284 | { |
9115729e KH |
5285 | staticpro (&last_overlay_modification_hooks); |
5286 | last_overlay_modification_hooks | |
5287 | = Fmake_vector (make_number (10), Qnil); | |
5288 | ||
1ab256cb RM |
5289 | staticpro (&Vbuffer_defaults); |
5290 | staticpro (&Vbuffer_local_symbols); | |
5291 | staticpro (&Qfundamental_mode); | |
5292 | staticpro (&Qmode_class); | |
5293 | staticpro (&QSFundamental); | |
5294 | staticpro (&Vbuffer_alist); | |
5295 | staticpro (&Qprotected_field); | |
5296 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5297 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5298 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5299 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5300 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5301 | staticpro (&Qoverlayp); |
d67b4f80 | 5302 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5303 | staticpro (&Qevaporate); |
d67b4f80 | 5304 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5305 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5306 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5307 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5308 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5309 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5310 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5311 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5312 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5313 | staticpro (&Qpriority); |
d67b4f80 | 5314 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5315 | staticpro (&Qbefore_string); |
d67b4f80 | 5316 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5317 | staticpro (&Qafter_string); |
d67b4f80 | 5318 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5319 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5320 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5321 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5322 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5323 | staticpro (&Qafter_change_functions); |
2f7a359d | 5324 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5325 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5326 | |
d67b4f80 | 5327 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5328 | staticpro (&Qkill_buffer_query_functions); |
5329 | ||
1ab256cb | 5330 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5331 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5332 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5333 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb RM |
5334 | |
5335 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5336 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5337 | ||
422745d0 TT |
5338 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5339 | mode_line_format, | |
5340 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5341 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5342 | |
422745d0 TT |
5343 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5344 | header_line_format, | |
5345 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5346 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5347 | |
422745d0 TT |
5348 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5349 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5350 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5351 | |
422745d0 TT |
5352 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5353 | extra_line_spacing, | |
5354 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5355 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5356 | |
422745d0 TT |
5357 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5358 | cursor_in_non_selected_windows, | |
5359 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5360 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5361 | ||
422745d0 TT |
5362 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5363 | abbrev_mode, | |
5364 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5365 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5366 | |
422745d0 TT |
5367 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5368 | ctl_arrow, | |
5369 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5370 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5371 | |
422745d0 TT |
5372 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5373 | enable_multibyte_characters, | |
5374 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5375 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5376 | |
422745d0 TT |
5377 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5378 | buffer_file_coding_system, | |
5379 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5380 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5381 | |
422745d0 TT |
5382 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5383 | truncate_lines, | |
5384 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5385 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5386 | |
422745d0 TT |
5387 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5388 | fill_column, | |
5389 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5390 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5391 | |
422745d0 TT |
5392 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5393 | left_margin, | |
5394 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5395 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5396 | |
422745d0 TT |
5397 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5398 | tab_width, | |
5399 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5400 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5401 | |
422745d0 TT |
5402 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5403 | case_fold_search, | |
5404 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5405 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5406 | |
422745d0 TT |
5407 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5408 | left_margin_cols, | |
5409 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5410 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5411 | |
422745d0 TT |
5412 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5413 | right_margin_cols, | |
5414 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5415 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5416 | |
422745d0 TT |
5417 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5418 | left_fringe_width, | |
5419 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5420 | This is the same as (default-value 'left-fringe-width). */); |
5421 | ||
422745d0 TT |
5422 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5423 | right_fringe_width, | |
5424 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5425 | This is the same as (default-value 'right-fringe-width). */); |
5426 | ||
422745d0 TT |
5427 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5428 | fringes_outside_margins, | |
5429 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5430 | This is the same as (default-value 'fringes-outside-margins). */); |
5431 | ||
422745d0 TT |
5432 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5433 | scroll_bar_width, | |
5434 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5435 | This is the same as (default-value 'scroll-bar-width). */); |
5436 | ||
422745d0 TT |
5437 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5438 | vertical_scroll_bar_type, | |
5439 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5440 | This is the same as (default-value 'vertical-scroll-bar). */); |
5441 | ||
422745d0 TT |
5442 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5443 | indicate_empty_lines, | |
5444 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5445 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5446 | |
422745d0 TT |
5447 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5448 | indicate_buffer_boundaries, | |
5449 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5450 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5451 | ||
422745d0 TT |
5452 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5453 | fringe_indicator_alist, | |
5454 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5455 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5456 | ||
422745d0 TT |
5457 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5458 | fringe_cursor_alist, | |
5459 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5460 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5461 | ||
422745d0 TT |
5462 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5463 | scroll_up_aggressively, | |
5464 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5465 | This value applies in buffers that don't have their own local values. |
fc961256 | 5466 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5467 | |
422745d0 TT |
5468 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5469 | scroll_down_aggressively, | |
5470 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5471 | This value applies in buffers that don't have their own local values. |
fc961256 | 5472 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5473 | |
045dee35 | 5474 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5475 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5476 | Qnil, |
7614d762 RS |
5477 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5478 | The header line appears, optionally, at the top of a window; | |
5479 | the mode line appears at the bottom. */); | |
177c0ea7 | 5480 | |
4b4deea2 | 5481 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5482 | Qnil, |
5483 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5484 | Each buffer has its own value of this variable. |
5485 | Value may be nil, a string, a symbol or a list or cons cell. | |
5486 | A value of nil means don't display a mode line. | |
5487 | For a symbol, its value is used (but it is ignored if t or nil). | |
5488 | A string appearing directly as the value of a symbol is processed verbatim | |
5489 | in that the %-constructs below are not recognized. | |
ed463255 | 5490 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5491 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5492 | in the value of that symbol will be ignored. |
018ba359 | 5493 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5494 | is used as a mode line element. Be careful--FORM should not load any files, |
5495 | because that can cause an infinite recursion. | |
ed463255 KS |
5496 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5497 | with the specified properties PROPS applied. | |
018ba359 PJ |
5498 | For a list whose car is a symbol, the symbol's value is taken, |
5499 | and if that is non-nil, the cadr of the list is processed recursively. | |
5500 | Otherwise, the caddr of the list (if there is one) is processed. | |
5501 | For a list whose car is a string or list, each element is processed | |
5502 | recursively and the results are effectively concatenated. | |
5503 | For a list whose car is an integer, the cdr of the list is processed | |
5504 | and padded (if the number is positive) or truncated (if negative) | |
5505 | to the width specified by that number. | |
5506 | A string is printed verbatim in the mode line except for %-constructs: | |
5507 | (%-constructs are allowed when the string is the entire mode-line-format | |
5508 | or when it is found in a cons-cell or a list) | |
5509 | %b -- print buffer name. %f -- print visited file name. | |
5510 | %F -- print frame name. | |
5511 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5512 | %& is like %*, but ignore read-only-ness. | |
5513 | % means buffer is read-only and * means it is modified. | |
5514 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5515 | %s -- print process status. %l -- print the current line number. | |
5516 | %c -- print the current column number (this makes editing slower). | |
5517 | To make the column number update correctly in all cases, | |
5518 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5519 | %i -- print the size of the buffer. |
5520 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5521 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5522 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5523 | or print Bottom or All. | |
018ba359 | 5524 | %n -- print Narrow if appropriate. |
dafbe726 | 5525 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5526 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5527 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5528 | %e -- print error message about full memory. |
f7165034 NR |
5529 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5530 | remote machine. | |
018ba359 PJ |
5531 | %[ -- print one [ for each recursive editing level. %] similar. |
5532 | %% -- print %. %- -- print infinitely many dashes. | |
5533 | Decimal digits after the % specify field width to which to pad. */); | |
5534 | ||
422745d0 TT |
5535 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
5536 | doc: /* *Value of `major-mode' for new buffers. */); | |
1ab256cb | 5537 | |
4b4deea2 | 5538 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5539 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5540 | doc: /* Symbol for current buffer's major mode. |
5541 | The default value (normally `fundamental-mode') affects new buffers. | |
5542 | A value of nil means to use the current buffer's major mode, provided | |
5543 | it is not marked as "special". | |
5544 | ||
5545 | When a mode is used by default, `find-file' switches to it before it | |
5546 | reads the contents into the buffer and before it finishes setting up | |
5547 | the buffer. Thus, the mode and its hooks should not expect certain | |
5548 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5549 | to be set up. */); | |
1ab256cb | 5550 | |
4b4deea2 | 5551 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5552 | Qnil, |
64a7c220 | 5553 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5554 | Usually a string, but can use any of the constructs for `mode-line-format', |
5555 | which see. | |
5556 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5557 | |
4b4deea2 | 5558 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5559 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5560 | ||
4b4deea2 | 5561 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5562 | doc: /* Non-nil if Abbrev mode is enabled. |
5563 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5564 | |
4b4deea2 | 5565 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5566 | Qnil, |
efc7e75f | 5567 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5568 | |
4b4deea2 | 5569 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5570 | make_number (LISP_INT_TAG), |
1ac5826d | 5571 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5572 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5573 | |
4b4deea2 | 5574 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5575 | make_number (LISP_INT_TAG), |
fc961256 | 5576 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5577 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5578 | |
4b4deea2 | 5579 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5580 | make_number (LISP_INT_TAG), |
efc7e75f | 5581 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5582 | |
4b4deea2 | 5583 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
efc7e75f | 5584 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5585 | A value of nil means use backslash and octal digits. |
5586 | This variable does not apply to characters whose display is specified | |
5587 | in the current display table (if there is one). */); | |
1ab256cb | 5588 | |
3b06f880 | 5589 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5590 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5591 | Qnil, |
efc7e75f | 5592 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5593 | Otherwise they are regarded as unibyte. This affects the display, |
5594 | file I/O and the behavior of various editing commands. | |
5595 | ||
5596 | This variable is buffer-local but you cannot set it directly; | |
5597 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5598 | Changing its default value with `setq-default' is supported. | |
5599 | See also variable `default-enable-multibyte-characters' and Info node | |
5600 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5601 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5602 | |
c71b5d9b | 5603 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5604 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5605 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5606 | This variable applies to saving the buffer, and also to `write-region' |
5607 | and other functions that use `write-region'. | |
5608 | It does not apply to sending output to subprocesses, however. | |
5609 | ||
5610 | If this is nil, the buffer is saved without any code conversion | |
5611 | unless some coding system is specified in `file-coding-system-alist' | |
5612 | for the buffer file. | |
5613 | ||
31a6cb06 EZ |
5614 | If the text to be saved cannot be encoded as specified by this variable, |
5615 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5616 | ||
018ba359 PJ |
5617 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5618 | ||
5619 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5620 | |
f44e260c | 5621 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5622 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5623 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5624 | |
6c0cf218 | 5625 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5626 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
b44d9321 | 5627 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5628 | |
b44d9321 EZ |
5629 | If this is nil (the default), the direction of each paragraph is |
5630 | determined by the first strong directional character of its text. | |
5631 | The values of `right-to-left' and `left-to-right' override that. | |
5632 | Any other value is treated as nil. | |
b4bf28b7 | 5633 | |
b44d9321 EZ |
5634 | This variable has no effect unless the buffer's value of |
5635 | \`bidi-display-reordering' is non-nil. */); | |
5636 | ||
4b4deea2 | 5637 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
7614d762 RS |
5638 | doc: /* *Non-nil means do not display continuation lines. |
5639 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5640 | |
5641 | Note that this is overridden by the variable | |
5642 | `truncate-partial-width-windows' if that variable is non-nil | |
5643 | and this buffer is not full-frame width. */); | |
1ab256cb | 5644 | |
4b4deea2 | 5645 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
0858cd02 CY |
5646 | doc: /* *Non-nil means to use word-wrapping for continuation lines. |
5647 | When word-wrapping is on, continuation lines are wrapped at the space | |
5648 | or tab character nearest to the right window edge. | |
5649 | If nil, continuation lines are wrapped at the right screen edge. | |
5650 | ||
5651 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5652 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5653 | word-wrapping, you might want to reduce the value of | |
5654 | `truncate-partial-width-windows', since wrapping can make text readable | |
5655 | in narrower windows. */); | |
0858cd02 | 5656 | |
4b4deea2 | 5657 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5658 | make_number (Lisp_String), |
efc7e75f | 5659 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5660 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5661 | |
4b4deea2 | 5662 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5663 | Qnil, |
efc7e75f | 5664 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5665 | It is called after self-inserting any character specified in |
5666 | the `auto-fill-chars' table. | |
5667 | NOTE: This variable is not a hook; | |
5668 | its value may not be a list of functions. */); | |
1ab256cb | 5669 | |
4b4deea2 | 5670 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5671 | make_number (Lisp_String), |
efc7e75f | 5672 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5673 | |
4b4deea2 | 5674 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5675 | make_number (Lisp_String), |
efc7e75f | 5676 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5677 | The truename of a file is calculated by `file-truename' |
5678 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5679 | |
1ab256cb | 5680 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5681 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5682 | make_number (Lisp_String), |
7614d762 RS |
5683 | doc: /* Name of file for auto-saving current buffer. |
5684 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5685 | |
4b4deea2 | 5686 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5687 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5688 | |
4b4deea2 | 5689 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5690 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5691 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5692 | |
4b4deea2 | 5693 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5694 | make_number (LISP_INT_TAG), |
efc7e75f | 5695 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5696 | 0 initially. |
5697 | -1 means auto-saving turned off until next real save. | |
5698 | ||
5699 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5700 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5701 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5702 | |
4b4deea2 | 5703 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5704 | Qnil, |
7614d762 | 5705 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5706 | An integer N as value means display only lines |
5707 | that start with less than N columns of space. | |
7614d762 RS |
5708 | A value of t means that the character ^M makes itself and |
5709 | all the rest of the line invisible; also, when saving the buffer | |
5710 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5711 | |
5712 | #ifndef old | |
5713 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5714 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5715 | Qnil, |
3f676284 | 5716 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5717 | #endif |
5718 | ||
4b4deea2 | 5719 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5720 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5721 | The value should be one of `overwrite-mode-textual', |
5722 | `overwrite-mode-binary', or nil. | |
5723 | If it is `overwrite-mode-textual', self-insertion still | |
5724 | inserts at the end of a line, and inserts when point is before a tab, | |
5725 | until the tab is filled in. | |
5726 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5727 | ||
4b4deea2 | 5728 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5729 | Qnil, |
efc7e75f | 5730 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5731 | |
5732 | If this variable is nil, the value of `standard-display-table' is used. | |
5733 | Each window can have its own, overriding display table, see | |
5734 | `set-window-display-table' and `window-display-table'. | |
5735 | ||
5736 | The display table is a char-table created with `make-display-table'. | |
5737 | A char-table is an array indexed by character codes. Normal array | |
5738 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5739 | ||
5740 | Each of the char-table elements control how to display the corresponding | |
5741 | text character: the element at index C in the table says how to display | |
5742 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5743 | characters or nil. The value nil means display the character in the |
5744 | default fashion; otherwise, the characters from the vector are delivered | |
5745 | to the screen instead of the original character. | |
018ba359 | 5746 | |
5fd11dc8 | 5747 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5748 | to display a capital Y instead of each X character. |
018ba359 PJ |
5749 | |
5750 | In addition, a char-table has six extra slots to control the display of: | |
5751 | ||
5752 | the end of a truncated screen line (extra-slot 0, a single character); | |
5753 | the end of a continued line (extra-slot 1, a single character); | |
5754 | the escape character used to display character codes in octal | |
5755 | (extra-slot 2, a single character); | |
5756 | the character used as an arrow for control characters (extra-slot 3, | |
5757 | a single character); | |
5758 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5759 | a vector of characters); | |
5760 | the character used to draw the border between side-by-side windows | |
5761 | (extra-slot 5, a single character). | |
5762 | ||
5763 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5764 | |
4b4deea2 | 5765 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5766 | Qnil, |
efc7e75f | 5767 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5768 | A value of nil means no marginal area. */); |
177c0ea7 | 5769 | |
4b4deea2 | 5770 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5771 | Qnil, |
efc7e75f | 5772 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5773 | A value of nil means no marginal area. */); |
177c0ea7 | 5774 | |
4b4deea2 | 5775 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a KS |
5776 | Qnil, |
5777 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5778 | A value of 0 means no left fringe is shown in this buffer's window. | |
5779 | A value of nil means to use the left fringe width from the window's frame. */); | |
5780 | ||
4b4deea2 | 5781 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a KS |
5782 | Qnil, |
5783 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5784 | A value of 0 means no right fringe is shown in this buffer's window. | |
5785 | A value of nil means to use the right fringe width from the window's frame. */); | |
5786 | ||
4b4deea2 | 5787 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a KS |
5788 | Qnil, |
5789 | doc: /* *Non-nil means to display fringes outside display margins. | |
5790 | A value of nil means to display fringes between margins and buffer text. */); | |
5791 | ||
4b4deea2 | 5792 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a KS |
5793 | Qnil, |
5794 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5795 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5796 | ||
4b4deea2 | 5797 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a KS |
5798 | Qnil, |
5799 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5800 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5801 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5802 | |
fc2c8887 RS |
5803 | A value of `left' or `right' means put the vertical scroll bar at that side |
5804 | of the window; a value of nil means don't show any vertical scroll bars. | |
5805 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5806 | |
0552666b | 5807 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5808 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
efc7e75f | 5809 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5810 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5811 | window-systems. */); | |
177c0ea7 | 5812 | |
6b61353c | 5813 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5814 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
6b61353c KH |
5815 | doc: /* *Visually indicate buffer boundaries and scrolling. |
5816 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5817 | of a window on window-systems with angle bitmaps, or if the window can be | |
5818 | scrolled, the top and bottom line of the window are marked with up and down | |
5819 | arrow bitmaps. | |
b2229037 KS |
5820 | |
5821 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5822 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5823 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5824 | the left fringe but no arrows. |
b2229037 | 5825 | |
79e3497d RS |
5826 | You can exercise more precise control by using an alist as the |
5827 | value. Each alist element (INDICATOR . POSITION) specifies | |
5828 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5829 | `bottom', `up', `down', or t, which specifies the default position, |
5830 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5831 | this indicator. | |
5832 | ||
5833 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5834 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5835 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5836 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5837 | |
c6a46372 | 5838 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5839 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
c6a46372 KS |
5840 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. |
5841 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5842 | specifies the fringe bitmaps used to display a specific logical | |
5843 | fringe indicator. | |
5844 | ||
5845 | INDICATOR specifies the logical indicator type which is one of the | |
5846 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5847 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5848 | |
14fb5704 | 5849 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5850 | the actual bitmap shown in the left or right fringe for the logical |
5851 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5852 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5853 | are used only for the `bottom' and `top-bottom' indicators when the |
5854 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5855 | symbol which is used in both left and right fringes. */); |
5856 | ||
5857 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5858 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
c6a46372 KS |
5859 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. |
5860 | The value is an alist where each element (CURSOR . BITMAP) | |
5861 | specifies the fringe bitmaps used to display a specific logical | |
5862 | cursor type in the fringe. | |
5863 | ||
5864 | CURSOR specifies the logical cursor type which is one of the following | |
5865 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5866 | one is used to show a hollow cursor on narrow lines display lines | |
5867 | where the normal hollow cursor will not fit. | |
5868 | ||
5869 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5870 | cursor type. */); | |
5871 | ||
0552666b | 5872 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5873 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5874 | doc: /* How far to scroll windows upward. |
5875 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5876 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5877 | means scroll to center point. A fraction means scroll to put point |
5878 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5879 | When the value is 0.0, point goes at the bottom line, which in the |
5880 | simple case that you moved off with C-f means scrolling just one line. | |
5881 | 1.0 means point goes at the top, so that in that simple case, the | |
5882 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5883 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5884 | |
0552666b | 5885 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5886 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5887 | doc: /* How far to scroll windows downward. |
5888 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5889 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5890 | means scroll to center point. A fraction means scroll to put point |
5891 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5892 | When the value is 0.0, point goes at the top line, which in the |
5893 | simple case that you moved off with C-b means scrolling just one line. | |
5894 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5895 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5896 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5897 | |
1ab256cb RM |
5898 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5899 | "Don't ask."); | |
5900 | */ | |
1ab256cb | 5901 | |
29208e82 | 5902 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5903 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5904 | Two arguments are passed to each function: the positions of |
5905 | the beginning and end of the range of old text to be changed. | |
5906 | \(For an insertion, the beginning and end are at the same place.) | |
5907 | No information is given about the length of the text after the change. | |
5908 | ||
5909 | Buffer changes made while executing the `before-change-functions' | |
5910 | don't call any before-change or after-change functions. | |
7b2bf907 | 5911 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5912 | |
5913 | If an unhandled error happens in running these functions, | |
5914 | the variable's value remains nil. That prevents the error | |
5915 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5916 | Vbefore_change_functions = Qnil; |
5917 | ||
29208e82 | 5918 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5919 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5920 | Three arguments are passed to each function: the positions of |
5921 | the beginning and end of the range of changed text, | |
5922 | and the length in bytes of the pre-change text replaced by that range. | |
5923 | \(For an insertion, the pre-change length is zero; | |
5924 | for a deletion, that length is the number of bytes deleted, | |
5925 | and the post-change beginning and end are at the same place.) | |
5926 | ||
5927 | Buffer changes made while executing the `after-change-functions' | |
5928 | don't call any before-change or after-change functions. | |
7b2bf907 | 5929 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5930 | |
5931 | If an unhandled error happens in running these functions, | |
5932 | the variable's value remains nil. That prevents the error | |
5933 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5934 | Vafter_change_functions = Qnil; |
5935 | ||
29208e82 | 5936 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5937 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5938 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5939 | Vfirst_change_hook = Qnil; |
1ab256cb | 5940 | |
4b4deea2 | 5941 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5942 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5943 | Recent changes come first; older changes follow newer. |
5944 | ||
5945 | An entry (BEG . END) represents an insertion which begins at | |
5946 | position BEG and ends at position END. | |
5947 | ||
5948 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5949 | from (abs POSITION). If POSITION is positive, point was at the front | |
5950 | of the text being deleted; if negative, point was at the end. | |
5951 | ||
5952 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5953 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5954 | of the visited file's modification time, as of that time. If the | |
5955 | modification time of the most recent save is different, this entry is | |
5956 | obsolete. | |
5957 | ||
5958 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5959 | was modified between BEG and END. PROPERTY is the property name, | |
5960 | and VALUE is the old value. | |
5961 | ||
7405f386 KS |
5962 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5963 | \(apply FUN-NAME ARGS). | |
5964 | ||
5965 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5966 | in the active region. BEG and END is the range affected by this entry | |
5967 | and DELTA is the number of bytes added or deleted in that range by | |
5968 | this change. | |
c6c7dc03 | 5969 | |
018ba359 PJ |
5970 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5971 | was adjusted in position by the offset DISTANCE (an integer). | |
5972 | ||
5973 | An entry of the form POSITION indicates that point was at the buffer | |
5974 | location given by the integer. Undoing an entry of this form places | |
5975 | point at POSITION. | |
5976 | ||
b4c4f2f4 JB |
5977 | Entries with value `nil' mark undo boundaries. The undo command treats |
5978 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5979 | |
5980 | If the value of the variable is t, undo information is not recorded. */); | |
5981 | ||
4b4deea2 | 5982 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5983 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5984 | |
4b4deea2 | 5985 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5986 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5987 | |
5988 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5989 | newlines. Columnar operations (like `move-to-column' and |
5990 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5991 | widths as they go. This works well for ordinary text, but if the |
5992 | buffer's lines are very long (say, more than 500 characters), these | |
5993 | motion functions will take longer to execute. Emacs may also take | |
5994 | longer to update the display. | |
5995 | ||
5629f29b | 5996 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5997 | results of their scans, and consult the cache to avoid rescanning |
5998 | regions of the buffer until the text is modified. The caches are most | |
5999 | beneficial when they prevent the most searching---that is, when the | |
6000 | buffer contains long lines and large regions of characters with the | |
6001 | same, fixed screen width. | |
6002 | ||
5629f29b | 6003 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6004 | become slightly slower (because of the overhead of consulting the |
6005 | cache), and the caches will use memory roughly proportional to the | |
6006 | number of newlines and characters whose screen width varies. | |
6007 | ||
6008 | The caches require no explicit maintenance; their accuracy is | |
6009 | maintained internally by the Emacs primitives. Enabling or disabling | |
6010 | the cache should not affect the behavior of any of the motion | |
6011 | functions; it should only affect their performance. */); | |
6012 | ||
4b4deea2 | 6013 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 6014 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 6015 | |
4b4deea2 | 6016 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 6017 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 6018 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6019 | set when a file is visited. */); |
be9aafdd | 6020 | |
71ed49fa | 6021 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 6022 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
71ed49fa LT |
6023 | doc: /* *Format in which to write auto-save files. |
6024 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6025 | If it is t, which is the default, auto-save files are written in the | |
6026 | same format as a regular save would use. */); | |
6027 | ||
3cb719bd | 6028 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6029 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6030 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6031 | The default is t, which means that text is invisible |
6032 | if it has a non-nil `invisible' property. | |
6033 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6034 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6035 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6036 | then characters with property value PROP are invisible, | |
6037 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6038 | |
7962a441 | 6039 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 6040 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 6041 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6042 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6043 | |
6044 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6045 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6046 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6047 | The function `set-window-buffer' updates this variable |
6048 | to the value obtained by calling `current-time'. | |
6049 | If the buffer has never been shown in a window, the value is nil. */); | |
6050 | ||
29208e82 | 6051 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6052 | doc: /* Non-nil if Transient Mark mode is enabled. |
6053 | See the command `transient-mark-mode' for a description of this minor mode. | |
6054 | ||
6055 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6056 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6057 | all windows or just the selected window. | |
6058 | ||
f49d1f52 SM |
6059 | Lisp programs may give this variable certain special values: |
6060 | ||
6061 | - A value of `lambda' enables Transient Mark mode temporarily. | |
6062 | It is disabled again after any subsequent action that would | |
6063 | normally deactivate the mark (e.g. buffer modification). | |
6064 | ||
6065 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6066 | temporarily. After any subsequent point motion command that is | |
6067 | not shift-translated, or any other action that would normally | |
6068 | deactivate the mark (e.g. buffer modification), the value of | |
6069 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6070 | Vtransient_mark_mode = Qnil; |
6071 | ||
29208e82 | 6072 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
7ee72033 | 6073 | doc: /* *Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6074 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6075 | text properties. If the value is a list, disregard `buffer-read-only' | |
6076 | and disregard a `read-only' text property if the property value | |
6077 | is a member of the list. */); | |
a96b68f1 RS |
6078 | Vinhibit_read_only = Qnil; |
6079 | ||
4b4deea2 | 6080 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6081 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6082 | Values are interpreted as follows: |
6083 | ||
b8dc613f JB |
6084 | t use the cursor specified for the frame |
6085 | nil don't display a cursor | |
6086 | box display a filled box cursor | |
6087 | hollow display a hollow box cursor | |
6088 | bar display a vertical bar cursor with default width | |
6089 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6090 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6091 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6092 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6093 | |
e08b1705 MR |
6094 | When the buffer is displayed in a non-selected window, the |
6095 | cursor's appearance is instead controlled by the variable | |
6096 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6097 | |
a3bbced0 | 6098 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6099 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6100 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6101 | The space is measured in pixels, and put below lines on graphic displays, |
6102 | see `display-graphic-p'. | |
60ebfdf3 | 6103 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6104 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6105 | |
0124c5bd | 6106 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6107 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
66c6abf0 GM |
6108 | doc: /* *Non-nil means show a cursor in non-selected windows. |
6109 | If nil, only shows a cursor in the selected window. | |
6110 | If t, displays a cursor related to the usual cursor type | |
6111 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6112 | You can also specify the cursor type as in the `cursor-type' variable. | |
6113 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6114 | |
29208e82 | 6115 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6116 | doc: /* List of functions called with no args to query before killing a buffer. |
6117 | The buffer being killed will be current while the functions are running. | |
6118 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6119 | Vkill_buffer_query_functions = Qnil; |
6120 | ||
29208e82 | 6121 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6122 | doc: /* Normal hook run before changing the major mode of a buffer. |
6123 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6124 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6125 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6126 | staticpro (&Qchange_major_mode_hook); |
6127 | ||
0dc88e60 | 6128 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6129 | defsubr (&Sbuffer_list); |
6130 | defsubr (&Sget_buffer); | |
6131 | defsubr (&Sget_file_buffer); | |
6132 | defsubr (&Sget_buffer_create); | |
336cd056 | 6133 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6134 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6135 | defsubr (&Sbuffer_name); |
6136 | /*defsubr (&Sbuffer_number);*/ | |
6137 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6138 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6139 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6140 | defsubr (&Sbuffer_local_variables); |
6141 | defsubr (&Sbuffer_modified_p); | |
6142 | defsubr (&Sset_buffer_modified_p); | |
6143 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6144 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6145 | defsubr (&Srename_buffer); |
6146 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6147 | defsubr (&Sbuffer_enable_undo); |
6148 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6149 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6150 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6151 | defsubr (&Scurrent_buffer); |
6152 | defsubr (&Sset_buffer); | |
6153 | defsubr (&Sbarf_if_buffer_read_only); | |
6154 | defsubr (&Sbury_buffer); | |
3ac81adb | 6155 | defsubr (&Serase_buffer); |
13cda5f9 | 6156 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6157 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6158 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6159 | |
52f8ec73 | 6160 | defsubr (&Soverlayp); |
2eec3b4e RS |
6161 | defsubr (&Smake_overlay); |
6162 | defsubr (&Sdelete_overlay); | |
6163 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6164 | defsubr (&Soverlay_start); |
6165 | defsubr (&Soverlay_end); | |
6166 | defsubr (&Soverlay_buffer); | |
6167 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6168 | defsubr (&Soverlays_at); |
74514898 | 6169 | defsubr (&Soverlays_in); |
2eec3b4e | 6170 | defsubr (&Snext_overlay_change); |
239c932b | 6171 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6172 | defsubr (&Soverlay_recenter); |
6173 | defsubr (&Soverlay_lists); | |
6174 | defsubr (&Soverlay_get); | |
6175 | defsubr (&Soverlay_put); | |
a8c21b48 | 6176 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6177 | } |
6178 | ||
dfcf069d | 6179 | void |
d3da34e0 | 6180 | keys_of_buffer (void) |
1ab256cb RM |
6181 | { |
6182 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6183 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6184 | |
6185 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6186 | initialized when that function gets called. */ | |
d67b4f80 | 6187 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6188 | } |