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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 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 | |
16a97296 PE |
103 | INFUN (Fset_buffer_major_mode, 1); |
104 | INFUN (Fdelete_overlay, 1); | |
f57e2426 J |
105 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
106 | int after, Lisp_Object arg1, | |
107 | Lisp_Object arg2, Lisp_Object arg3); | |
108 | static void swap_out_buffer_local_variables (struct buffer *b); | |
109 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
110 | |
111 | /* Alist of all buffer names vs the buffers. */ | |
112 | /* This used to be a variable, but is no longer, | |
113 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
114 | Lisp_Object Vbuffer_alist; | |
115 | ||
5b20caf0 | 116 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 117 | |
43ed3b8d | 118 | /* Hook run before changing a major mode. */ |
29208e82 | 119 | Lisp_Object Qchange_major_mode_hook; |
22378665 | 120 | |
dbc4e1c1 | 121 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
122 | Lisp_Object Qbefore_change_functions; |
123 | Lisp_Object Qafter_change_functions; | |
48265e61 | 124 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb RM |
125 | |
126 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; | |
2f7a359d | 127 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
128 | |
129 | Lisp_Object Qprotected_field; | |
130 | ||
131 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
132 | ||
133 | Lisp_Object Qkill_buffer_hook; | |
134 | ||
5fe0b67e RS |
135 | Lisp_Object Qget_file_buffer; |
136 | ||
52f8ec73 JB |
137 | Lisp_Object Qoverlayp; |
138 | ||
2c09a58f | 139 | Lisp_Object Qpriority, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 140 | |
294d215f RS |
141 | Lisp_Object Qmodification_hooks; |
142 | Lisp_Object Qinsert_in_front_hooks; | |
143 | Lisp_Object Qinsert_behind_hooks; | |
144 | ||
f57e2426 J |
145 | static void alloc_buffer_text (struct buffer *, size_t); |
146 | static void free_buffer_text (struct buffer *b); | |
147 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
148 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
149 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 150 | |
1ab256cb RM |
151 | /* For debugging; temporary. See set_buffer_internal. */ |
152 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
153 | ||
01136e9b | 154 | void |
d3da34e0 | 155 | nsberror (Lisp_Object spec) |
1ab256cb | 156 | { |
a7a60ce9 | 157 | if (STRINGP (spec)) |
d5db4077 | 158 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
159 | error ("Invalid buffer argument"); |
160 | } | |
161 | \f | |
16a97296 | 162 | DEFUE ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
163 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
164 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 165 | (Lisp_Object object) |
0dc88e60 | 166 | { |
4b4deea2 | 167 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
168 | ? Qt : Qnil); |
169 | } | |
170 | ||
08460cd4 | 171 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 172 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
173 | If the optional arg FRAME is a frame, we return the buffer list |
174 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
175 | frame parameter come first, followed by the rest of the buffers. */) | |
5842a27b | 176 | (Lisp_Object frame) |
1ab256cb | 177 | { |
a18b8cb5 | 178 | Lisp_Object general; |
08460cd4 RS |
179 | general = Fmapcar (Qcdr, Vbuffer_alist); |
180 | ||
181 | if (FRAMEP (frame)) | |
182 | { | |
a18b8cb5 KL |
183 | Lisp_Object framelist, prevlist, tail; |
184 | Lisp_Object args[3]; | |
08460cd4 | 185 | |
b7826503 | 186 | CHECK_FRAME (frame); |
08460cd4 RS |
187 | |
188 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 189 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 190 | |
a18b8cb5 KL |
191 | /* Remove from GENERAL any buffer that duplicates one in |
192 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 193 | tail = framelist; |
a18b8cb5 | 194 | while (CONSP (tail)) |
08460cd4 | 195 | { |
7539e11f KR |
196 | general = Fdelq (XCAR (tail), general); |
197 | tail = XCDR (tail); | |
08460cd4 | 198 | } |
a18b8cb5 KL |
199 | tail = prevlist; |
200 | while (CONSP (tail)) | |
201 | { | |
202 | general = Fdelq (XCAR (tail), general); | |
203 | tail = XCDR (tail); | |
204 | } | |
205 | ||
206 | args[0] = framelist; | |
207 | args[1] = general; | |
208 | args[2] = prevlist; | |
209 | return Fnconc (3, args); | |
08460cd4 RS |
210 | } |
211 | ||
212 | return general; | |
1ab256cb RM |
213 | } |
214 | ||
04ae1b48 RS |
215 | /* Like Fassoc, but use Fstring_equal to compare |
216 | (which ignores text properties), | |
217 | and don't ever QUIT. */ | |
218 | ||
219 | static Lisp_Object | |
d3da34e0 | 220 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
221 | { |
222 | register Lisp_Object tail; | |
6d70a280 | 223 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
224 | { |
225 | register Lisp_Object elt, tem; | |
6d70a280 | 226 | elt = XCAR (tail); |
04ae1b48 RS |
227 | tem = Fstring_equal (Fcar (elt), key); |
228 | if (!NILP (tem)) | |
229 | return elt; | |
230 | } | |
231 | return Qnil; | |
232 | } | |
233 | ||
16a97296 | 234 | DEFUE ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
235 | doc: /* Return the buffer named BUFFER-OR-NAME. |
236 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
237 | is a string and there is no buffer with that name, return nil. If | |
238 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 239 | (register Lisp_Object buffer_or_name) |
1ab256cb | 240 | { |
c8804c4f MR |
241 | if (BUFFERP (buffer_or_name)) |
242 | return buffer_or_name; | |
243 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 244 | |
c8804c4f | 245 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
246 | } |
247 | ||
248 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 249 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
250 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
251 | If there is no such live buffer, return nil. | |
7ee72033 | 252 | See also `find-buffer-visiting'. */) |
5842a27b | 253 | (register Lisp_Object filename) |
1ab256cb RM |
254 | { |
255 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
256 | Lisp_Object handler; |
257 | ||
b7826503 | 258 | CHECK_STRING (filename); |
1ab256cb RM |
259 | filename = Fexpand_file_name (filename, Qnil); |
260 | ||
5fe0b67e RS |
261 | /* If the file name has special constructs in it, |
262 | call the corresponding file handler. */ | |
a617e913 | 263 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
264 | if (!NILP (handler)) |
265 | return call2 (handler, Qget_file_buffer, filename); | |
266 | ||
7539e11f | 267 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 268 | { |
7539e11f | 269 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 270 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
271 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
272 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 273 | if (!NILP (tem)) |
1ab256cb RM |
274 | return buf; |
275 | } | |
276 | return Qnil; | |
277 | } | |
278 | ||
52e01189 | 279 | Lisp_Object |
d3da34e0 | 280 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
281 | { |
282 | register Lisp_Object tail, buf, tem; | |
283 | ||
7539e11f | 284 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 285 | { |
7539e11f | 286 | buf = Fcdr (XCAR (tail)); |
52e01189 | 287 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
288 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
289 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
290 | if (!NILP (tem)) |
291 | return buf; | |
292 | } | |
293 | return Qnil; | |
294 | } | |
295 | ||
1ab256cb RM |
296 | /* Incremented for each buffer created, to assign the buffer number. */ |
297 | int buffer_count; | |
298 | ||
16a97296 | 299 | DEFUE ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
300 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
301 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
302 | return that buffer. If no such buffer exists, create a new buffer with | |
303 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
304 | buffer does not keep undo information. | |
305 | ||
306 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
307 | even if it is dead. The return value is never nil. */) | |
5842a27b | 308 | (register Lisp_Object buffer_or_name) |
1ab256cb | 309 | { |
cd265ca6 | 310 | register Lisp_Object buffer, name; |
1ab256cb RM |
311 | register struct buffer *b; |
312 | ||
cd265ca6 MR |
313 | buffer = Fget_buffer (buffer_or_name); |
314 | if (!NILP (buffer)) | |
315 | return buffer; | |
1ab256cb | 316 | |
cd265ca6 | 317 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
318 | error ("Empty string for buffer name is not allowed"); |
319 | ||
cc648cef | 320 | b = allocate_buffer (); |
1ab256cb | 321 | |
336cd056 RS |
322 | /* An ordinary buffer uses its own struct buffer_text. */ |
323 | b->text = &b->own_text; | |
324 | b->base_buffer = 0; | |
325 | ||
1ab256cb | 326 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 327 | BLOCK_INPUT; |
3b06f880 KH |
328 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
329 | anchoring a search. */ | |
b86af064 | 330 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 331 | UNBLOCK_INPUT; |
1ab256cb | 332 | if (! BUF_BEG_ADDR (b)) |
81841847 | 333 | buffer_memory_full (); |
1ab256cb | 334 | |
cffc6f3b CY |
335 | b->pt = BEG; |
336 | b->begv = BEG; | |
337 | b->zv = BEG; | |
338 | b->pt_byte = BEG_BYTE; | |
339 | b->begv_byte = BEG_BYTE; | |
340 | b->zv_byte = BEG_BYTE; | |
341 | ||
6d70a280 | 342 | BUF_GPT (b) = BEG; |
6d70a280 | 343 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
344 | |
345 | BUF_Z (b) = BEG; | |
6d70a280 | 346 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 347 | BUF_MODIFF (b) = 1; |
3e145152 | 348 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 349 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
350 | BUF_SAVE_MODIFF (b) = 1; |
351 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
352 | BUF_UNCHANGED_MODIFIED (b) = 1; |
353 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
354 | BUF_END_UNCHANGED (b) = 0; | |
355 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 356 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 357 | |
28e969dd JB |
358 | b->newline_cache = 0; |
359 | b->width_run_cache = 0; | |
4b4deea2 | 360 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 361 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 362 | |
1ab256cb RM |
363 | /* Put this on the chain of all buffers including killed ones. */ |
364 | b->next = all_buffers; | |
365 | all_buffers = b; | |
366 | ||
336cd056 RS |
367 | /* An ordinary buffer normally doesn't need markers |
368 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
369 | BVAR (b, pt_marker) = Qnil; |
370 | BVAR (b, begv_marker) = Qnil; | |
371 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 372 | |
cd265ca6 | 373 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 374 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 375 | BVAR (b, name) = name; |
04ae1b48 | 376 | |
4b4deea2 | 377 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
378 | |
379 | reset_buffer (b); | |
13de9290 | 380 | reset_buffer_local_variables (b, 1); |
1ab256cb | 381 | |
4b4deea2 | 382 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 383 | BUF_MARKERS (b) = NULL; |
4b4deea2 | 384 | BVAR (b, name) = name; |
1f57cb74 | 385 | |
1ab256cb | 386 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
387 | XSETBUFFER (buffer, b); |
388 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 389 | |
2f064abf | 390 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
391 | can lead to infinite regress until you run out of stack. rms |
392 | says that's not worth protecting against. */ | |
48265e61 | 393 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
394 | /* buffer is on buffer-alist, so no gcpro. */ |
395 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 396 | |
cd265ca6 | 397 | return buffer; |
336cd056 RS |
398 | } |
399 | ||
7e9d5818 | 400 | |
04e4cb3a GM |
401 | /* Return a list of overlays which is a copy of the overlay list |
402 | LIST, but for buffer B. */ | |
403 | ||
2410d73a | 404 | static struct Lisp_Overlay * |
d3da34e0 | 405 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 406 | { |
2410d73a SM |
407 | Lisp_Object buffer; |
408 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
409 | |
410 | XSETBUFFER (buffer, b); | |
411 | ||
2410d73a | 412 | for (; list; list = list->next) |
04e4cb3a GM |
413 | { |
414 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 415 | EMACS_INT charpos; |
04e4cb3a | 416 | |
2410d73a | 417 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
418 | charpos = marker_position (OVERLAY_START (old_overlay)); |
419 | start = Fmake_marker (); | |
db3a49a6 | 420 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
421 | XMARKER (start)->insertion_type |
422 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
423 | ||
424 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
425 | end = Fmake_marker (); | |
db3a49a6 | 426 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
427 | XMARKER (end)->insertion_type |
428 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
429 | ||
430 | overlay = allocate_misc (); | |
431 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
432 | OVERLAY_START (overlay) = start; | |
433 | OVERLAY_END (overlay) = end; | |
434 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 435 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 436 | |
2410d73a SM |
437 | if (tail) |
438 | tail = tail->next = XOVERLAY (overlay); | |
439 | else | |
440 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
441 | } |
442 | ||
2410d73a | 443 | return result; |
04e4cb3a | 444 | } |
177c0ea7 | 445 | |
04e4cb3a | 446 | |
7e9d5818 GM |
447 | /* Clone per-buffer values of buffer FROM. |
448 | ||
449 | Buffer TO gets the same per-buffer values as FROM, with the | |
450 | following exceptions: (1) TO's name is left untouched, (2) markers | |
451 | are copied and made to refer to TO, and (3) overlay lists are | |
452 | copied. */ | |
453 | ||
454 | static void | |
d3da34e0 | 455 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 456 | { |
54622f33 | 457 | Lisp_Object to_buffer; |
7e9d5818 GM |
458 | int offset; |
459 | ||
460 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 461 | |
3ee24aec SM |
462 | /* buffer-local Lisp variables start at `undo_list', |
463 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 464 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
465 | offset < sizeof *to; |
466 | offset += sizeof (Lisp_Object)) | |
467 | { | |
468 | Lisp_Object obj; | |
469 | ||
4b7cdc0e SM |
470 | /* Don't touch the `name' which should be unique for every buffer. */ |
471 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
472 | continue; | |
473 | ||
7e9d5818 | 474 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 475 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
476 | { |
477 | struct Lisp_Marker *m = XMARKER (obj); | |
478 | obj = Fmake_marker (); | |
479 | XMARKER (obj)->insertion_type = m->insertion_type; | |
480 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
481 | } | |
482 | ||
483 | PER_BUFFER_VALUE (to, offset) = obj; | |
484 | } | |
485 | ||
72af86bd | 486 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 487 | |
04e4cb3a GM |
488 | to->overlays_before = copy_overlays (to, from->overlays_before); |
489 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 490 | |
e1688f54 RS |
491 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
492 | and install that in TO. */ | |
4b4deea2 | 493 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
494 | } |
495 | ||
cffc6f3b CY |
496 | |
497 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
498 | current, update these markers. */ | |
499 | ||
500 | static void | |
501 | record_buffer_markers (struct buffer *b) | |
502 | { | |
503 | if (! NILP (BVAR (b, pt_marker))) | |
504 | { | |
505 | Lisp_Object buffer; | |
506 | ||
507 | eassert (!NILP (BVAR (b, begv_marker))); | |
508 | eassert (!NILP (BVAR (b, zv_marker))); | |
509 | ||
510 | XSETBUFFER (buffer, b); | |
511 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
512 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
513 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
514 | } | |
515 | } | |
516 | ||
517 | ||
518 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
519 | current, fetch these values into B->begv etc. */ | |
520 | ||
521 | static void | |
522 | fetch_buffer_markers (struct buffer *b) | |
523 | { | |
524 | if (! NILP (BVAR (b, pt_marker))) | |
525 | { | |
526 | Lisp_Object m; | |
527 | ||
528 | eassert (!NILP (BVAR (b, begv_marker))); | |
529 | eassert (!NILP (BVAR (b, zv_marker))); | |
530 | ||
531 | m = BVAR (b, pt_marker); | |
532 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
533 | ||
534 | m = BVAR (b, begv_marker); | |
535 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
536 | ||
537 | m = BVAR (b, zv_marker); | |
538 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
539 | } | |
540 | } | |
541 | ||
542 | ||
7e9d5818 GM |
543 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
544 | 2, 3, | |
193c3837 | 545 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 546 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 547 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
548 | NAME should be a string which is not the name of an existing buffer. |
549 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
550 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 551 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 552 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 553 | { |
6b61353c | 554 | Lisp_Object buf, tem; |
7e9d5818 | 555 | struct buffer *b; |
336cd056 | 556 | |
6b61353c | 557 | CHECK_STRING (name); |
336cd056 RS |
558 | buf = Fget_buffer (name); |
559 | if (!NILP (buf)) | |
d5db4077 | 560 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 561 | |
6b61353c | 562 | tem = base_buffer; |
336cd056 RS |
563 | base_buffer = Fget_buffer (base_buffer); |
564 | if (NILP (base_buffer)) | |
6b61353c | 565 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 566 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 567 | error ("Base buffer has been killed"); |
336cd056 | 568 | |
d5db4077 | 569 | if (SCHARS (name) == 0) |
336cd056 RS |
570 | error ("Empty string for buffer name is not allowed"); |
571 | ||
cc648cef | 572 | b = allocate_buffer (); |
336cd056 | 573 | |
67ee9f6e SM |
574 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
575 | ? XBUFFER (base_buffer)->base_buffer | |
576 | : XBUFFER (base_buffer)); | |
336cd056 RS |
577 | |
578 | /* Use the base buffer's text object. */ | |
579 | b->text = b->base_buffer->text; | |
580 | ||
cffc6f3b CY |
581 | b->pt = b->base_buffer->pt; |
582 | b->begv = b->base_buffer->begv; | |
583 | b->zv = b->base_buffer->zv; | |
584 | b->pt_byte = b->base_buffer->pt_byte; | |
585 | b->begv_byte = b->base_buffer->begv_byte; | |
586 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
587 | |
588 | b->newline_cache = 0; | |
589 | b->width_run_cache = 0; | |
4b4deea2 | 590 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
591 | |
592 | /* Put this on the chain of all buffers including killed ones. */ | |
593 | b->next = all_buffers; | |
594 | all_buffers = b; | |
595 | ||
596 | name = Fcopy_sequence (name); | |
ab77f05c | 597 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 598 | BVAR (b, name) = name; |
336cd056 RS |
599 | |
600 | reset_buffer (b); | |
13de9290 | 601 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
602 | |
603 | /* Put this in the alist of all live buffers. */ | |
604 | XSETBUFFER (buf, b); | |
605 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
606 | ||
4b4deea2 TT |
607 | BVAR (b, mark) = Fmake_marker (); |
608 | BVAR (b, name) = name; | |
336cd056 | 609 | |
abc9d959 | 610 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 611 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 612 | |
336cd056 | 613 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 614 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 615 | { |
2aa46d6c CY |
616 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
617 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 618 | |
4b4deea2 TT |
619 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
620 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
cffc6f3b CY |
621 | b->base_buffer->pt, |
622 | b->base_buffer->pt_byte); | |
623 | ||
4b4deea2 TT |
624 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
625 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
cffc6f3b CY |
626 | b->base_buffer->begv, |
627 | b->base_buffer->begv_byte); | |
628 | ||
4b4deea2 TT |
629 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
630 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
cffc6f3b CY |
631 | b->base_buffer->zv, |
632 | b->base_buffer->zv_byte); | |
4b4deea2 | 633 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
634 | } |
635 | ||
7e9d5818 GM |
636 | if (NILP (clone)) |
637 | { | |
638 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 | 639 | BVAR (b, pt_marker) = Fmake_marker (); |
cffc6f3b | 640 | set_marker_both (BVAR (b, pt_marker), buf, b->pt, b->pt_byte); |
4b4deea2 | 641 | BVAR (b, begv_marker) = Fmake_marker (); |
cffc6f3b | 642 | set_marker_both (BVAR (b, begv_marker), buf, b->begv, b->begv_byte); |
4b4deea2 | 643 | BVAR (b, zv_marker) = Fmake_marker (); |
cffc6f3b | 644 | set_marker_both (BVAR (b, zv_marker), buf, b->zv, b->zv_byte); |
4b4deea2 | 645 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
646 | } |
647 | else | |
7fa57e45 RS |
648 | { |
649 | struct buffer *old_b = current_buffer; | |
650 | ||
651 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
652 | BVAR (b, filename) = Qnil; |
653 | BVAR (b, file_truename) = Qnil; | |
654 | BVAR (b, display_count) = make_number (0); | |
655 | BVAR (b, backed_up) = Qnil; | |
656 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
657 | set_buffer_internal_1 (b); |
658 | Fset (intern ("buffer-save-without-query"), Qnil); | |
659 | Fset (intern ("buffer-file-number"), Qnil); | |
660 | Fset (intern ("buffer-stale-function"), Qnil); | |
661 | set_buffer_internal_1 (old_b); | |
662 | } | |
336cd056 | 663 | |
a9ee7a59 | 664 | return buf; |
1ab256cb RM |
665 | } |
666 | ||
d4f5719a | 667 | void |
d3da34e0 | 668 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
669 | { |
670 | Lisp_Object overlay; | |
671 | ||
672 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
673 | have to empty the list, otherwise we end up with overlays that | |
674 | think they belong to this buffer while the buffer doesn't know about | |
675 | them any more. */ | |
676 | while (b->overlays_before) | |
677 | { | |
678 | XSETMISC (overlay, b->overlays_before); | |
679 | Fdelete_overlay (overlay); | |
680 | } | |
681 | while (b->overlays_after) | |
682 | { | |
683 | XSETMISC (overlay, b->overlays_after); | |
684 | Fdelete_overlay (overlay); | |
685 | } | |
686 | eassert (b->overlays_before == NULL); | |
687 | eassert (b->overlays_after == NULL); | |
688 | } | |
689 | ||
bcd40520 | 690 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 691 | and local variables. |
d4f5719a SM |
692 | If called on an already-initialized buffer, the list of overlays |
693 | should be deleted before calling this function, otherwise we end up | |
694 | with overlays that claim to belong to the buffer but the buffer | |
695 | claims it doesn't belong to it. */ | |
1ab256cb RM |
696 | |
697 | void | |
d3da34e0 | 698 | reset_buffer (register struct buffer *b) |
1ab256cb | 699 | { |
4b4deea2 TT |
700 | BVAR (b, filename) = Qnil; |
701 | BVAR (b, file_truename) = Qnil; | |
702 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 703 | b->modtime = 0; |
58b963f7 | 704 | b->modtime_size = -1; |
4b4deea2 | 705 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 706 | b->last_window_start = 1; |
8b264726 | 707 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
708 | b->clip_changed = 0; |
709 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 710 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 711 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 712 | b->auto_save_failure_time = -1; |
4b4deea2 TT |
713 | BVAR (b, auto_save_file_name) = Qnil; |
714 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
715 | b->overlays_before = NULL; |
716 | b->overlays_after = NULL; | |
c2d5b10f | 717 | b->overlay_center = BEG; |
4b4deea2 TT |
718 | BVAR (b, mark_active) = Qnil; |
719 | BVAR (b, point_before_scroll) = Qnil; | |
720 | BVAR (b, file_format) = Qnil; | |
721 | BVAR (b, auto_save_file_format) = Qt; | |
722 | BVAR (b, last_selected_window) = Qnil; | |
723 | XSETINT (BVAR (b, display_count), 0); | |
724 | BVAR (b, display_time) = Qnil; | |
725 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
726 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
727 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
728 | |
729 | b->display_error_modiff = 0; | |
1ab256cb RM |
730 | } |
731 | ||
bcd40520 RS |
732 | /* Reset buffer B's local variables info. |
733 | Don't use this on a buffer that has already been in use; | |
734 | it does not treat permanent locals consistently. | |
13de9290 RS |
735 | Instead, use Fkill_all_local_variables. |
736 | ||
3709505e | 737 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
738 | buffer-local variables. If PERMANENT_TOO is 0, |
739 | we preserve those. */ | |
bcd40520 | 740 | |
13de9290 | 741 | static void |
d3da34e0 | 742 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
743 | { |
744 | register int offset; | |
7c02e886 | 745 | int i; |
1ab256cb RM |
746 | |
747 | /* Reset the major mode to Fundamental, together with all the | |
748 | things that depend on the major mode. | |
749 | default-major-mode is handled at a higher level. | |
750 | We ignore it here. */ | |
4b4deea2 TT |
751 | BVAR (b, major_mode) = Qfundamental_mode; |
752 | BVAR (b, keymap) = Qnil; | |
753 | BVAR (b, mode_name) = QSFundamental; | |
754 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
755 | |
756 | /* If the standard case table has been altered and invalidated, | |
757 | fix up its insides first. */ | |
758 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
759 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
760 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
761 | Fset_standard_case_table (Vascii_downcase_table); | |
762 | ||
4b4deea2 TT |
763 | BVAR (b, downcase_table) = Vascii_downcase_table; |
764 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
765 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
766 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
767 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 768 | |
13de9290 | 769 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 770 | if (permanent_too) |
4b4deea2 | 771 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
772 | else |
773 | { | |
2f7a359d | 774 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 775 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 776 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
777 | { |
778 | /* If permanent-local, keep it. */ | |
779 | last = tmp; | |
780 | if (EQ (prop, Qpermanent_local_hook)) | |
781 | { | |
782 | /* This is a partially permanent hook variable. | |
783 | Preserve only the elements that want to be preserved. */ | |
784 | Lisp_Object list, newlist; | |
785 | list = XCDR (XCAR (tmp)); | |
786 | if (!CONSP (list)) | |
787 | newlist = list; | |
788 | else | |
789 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
790 | { | |
791 | Lisp_Object elt = XCAR (list); | |
792 | /* Preserve element ELT if it's t, | |
793 | if it is a function with a `permanent-local-hook' property, | |
794 | or if it's not a symbol. */ | |
795 | if (! SYMBOLP (elt) | |
796 | || EQ (elt, Qt) | |
797 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
798 | newlist = Fcons (elt, newlist); | |
799 | } | |
800 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
801 | } | |
802 | } | |
803 | /* Delete this local variable. */ | |
3709505e | 804 | else if (NILP (last)) |
4b4deea2 | 805 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
806 | else |
807 | XSETCDR (last, XCDR (tmp)); | |
808 | } | |
809 | ||
7313acd0 | 810 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 811 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 812 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
813 | |
814 | /* For each slot that has a default value, | |
815 | copy that into the slot. */ | |
816 | ||
3ee24aec SM |
817 | /* buffer-local Lisp variables start at `undo_list', |
818 | tho only the ones from `name' on are GC'd normally. */ | |
819 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
820 | offset < sizeof *b; |
821 | offset += sizeof (Lisp_Object)) | |
aab80822 | 822 | { |
7313acd0 | 823 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
824 | if ((idx > 0 |
825 | && (permanent_too | |
ce5b453a | 826 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 827 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 828 | } |
1ab256cb RM |
829 | } |
830 | ||
01050cb5 RM |
831 | /* We split this away from generate-new-buffer, because rename-buffer |
832 | and set-visited-file-name ought to be able to use this to really | |
833 | rename the buffer properly. */ | |
834 | ||
16a97296 PE |
835 | DEFUE ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
836 | Sgenerate_new_buffer_name, 1, 2, 0, | |
7ee72033 | 837 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
838 | If there is no live buffer named NAME, then return NAME. |
839 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 840 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
841 | Optional second argument IGNORE specifies a name that is okay to use (if |
842 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 843 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
844 | { |
845 | register Lisp_Object gentemp, tem; | |
846 | int count; | |
847 | char number[10]; | |
848 | ||
b7826503 | 849 | CHECK_STRING (name); |
1ab256cb | 850 | |
6b61353c KH |
851 | tem = Fstring_equal (name, ignore); |
852 | if (!NILP (tem)) | |
853 | return name; | |
1ab256cb | 854 | tem = Fget_buffer (name); |
265a9e55 | 855 | if (NILP (tem)) |
01050cb5 | 856 | return name; |
1ab256cb RM |
857 | |
858 | count = 1; | |
859 | while (1) | |
860 | { | |
861 | sprintf (number, "<%d>", ++count); | |
862 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 863 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
864 | if (!NILP (tem)) |
865 | return gentemp; | |
1ab256cb | 866 | tem = Fget_buffer (gentemp); |
265a9e55 | 867 | if (NILP (tem)) |
01050cb5 | 868 | return gentemp; |
1ab256cb RM |
869 | } |
870 | } | |
871 | ||
872 | \f | |
16a97296 | 873 | DEFUE ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 874 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
875 | BUFFER defaults to the current buffer. |
876 | Return nil if BUFFER has been killed. */) | |
5842a27b | 877 | (register Lisp_Object buffer) |
1ab256cb | 878 | { |
265a9e55 | 879 | if (NILP (buffer)) |
4b4deea2 | 880 | return BVAR (current_buffer, name); |
b7826503 | 881 | CHECK_BUFFER (buffer); |
4b4deea2 | 882 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
883 | } |
884 | ||
16a97296 | 885 | DEFUE ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
886 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
887 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 888 | (register Lisp_Object buffer) |
1ab256cb | 889 | { |
265a9e55 | 890 | if (NILP (buffer)) |
4b4deea2 | 891 | return BVAR (current_buffer, filename); |
b7826503 | 892 | CHECK_BUFFER (buffer); |
4b4deea2 | 893 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
894 | } |
895 | ||
336cd056 RS |
896 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
897 | 0, 1, 0, | |
7ee72033 | 898 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
899 | If BUFFER is not indirect, return nil. |
900 | BUFFER defaults to the current buffer. */) | |
5842a27b | 901 | (register Lisp_Object buffer) |
336cd056 RS |
902 | { |
903 | struct buffer *base; | |
904 | Lisp_Object base_buffer; | |
905 | ||
906 | if (NILP (buffer)) | |
907 | base = current_buffer->base_buffer; | |
908 | else | |
909 | { | |
b7826503 | 910 | CHECK_BUFFER (buffer); |
336cd056 RS |
911 | base = XBUFFER (buffer)->base_buffer; |
912 | } | |
913 | ||
914 | if (! base) | |
915 | return Qnil; | |
916 | XSETBUFFER (base_buffer, base); | |
917 | return base_buffer; | |
918 | } | |
919 | ||
16a97296 | 920 | DEFUE ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 921 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
922 | doc: /* Return the value of VARIABLE in BUFFER. |
923 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 924 | is the default binding of the variable. */) |
5842a27b | 925 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
926 | { |
927 | register struct buffer *buf; | |
928 | register Lisp_Object result; | |
ad97b375 | 929 | struct Lisp_Symbol *sym; |
79aa712d | 930 | |
5e2ad10b | 931 | CHECK_SYMBOL (variable); |
ae69175b | 932 | CHECK_BUFFER (buffer); |
79aa712d | 933 | buf = XBUFFER (buffer); |
ce5b453a | 934 | sym = XSYMBOL (variable); |
79aa712d | 935 | |
ce5b453a SM |
936 | start: |
937 | switch (sym->redirect) | |
f0bac7de | 938 | { |
ce5b453a SM |
939 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
940 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
941 | case SYMBOL_LOCALIZED: | |
942 | { /* Look in local_var_alist. */ | |
943 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
944 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 945 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
946 | if (!NILP (result)) |
947 | { | |
948 | if (blv->fwd) | |
949 | { /* What binding is loaded right now? */ | |
950 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 951 | |
ce5b453a SM |
952 | /* The value of the currently loaded binding is not |
953 | stored in it, but rather in the realvalue slot. | |
954 | Store that value into the binding it belongs to | |
955 | in case that is the one we are about to use. */ | |
f0bac7de | 956 | |
ce5b453a SM |
957 | XSETCDR (current_alist_element, |
958 | do_symval_forwarding (blv->fwd)); | |
959 | } | |
960 | /* Now get the (perhaps updated) value out of the binding. */ | |
961 | result = XCDR (result); | |
962 | } | |
963 | else | |
964 | result = Fdefault_value (variable); | |
965 | break; | |
966 | } | |
967 | case SYMBOL_FORWARDED: | |
968 | { | |
969 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
970 | if (BUFFER_OBJFWDP (fwd)) | |
971 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
972 | else | |
973 | result = Fdefault_value (variable); | |
974 | break; | |
975 | } | |
976 | default: abort (); | |
f0bac7de | 977 | } |
79aa712d | 978 | |
4c4dc0b0 KS |
979 | if (!EQ (result, Qunbound)) |
980 | return result; | |
79aa712d | 981 | |
4c4dc0b0 | 982 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
983 | } |
984 | ||
e1688f54 | 985 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 986 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
987 | in special slots in the buffer object. */ |
988 | ||
989 | static Lisp_Object | |
d3da34e0 | 990 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
991 | { |
992 | Lisp_Object result = Qnil; | |
993 | register Lisp_Object tail; | |
4b4deea2 | 994 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
995 | { |
996 | Lisp_Object val, elt; | |
997 | ||
998 | elt = XCAR (tail); | |
999 | ||
1000 | /* Reference each variable in the alist in buf. | |
1001 | If inquiring about the current buffer, this gets the current values, | |
1002 | so store them into the alist so the alist is up to date. | |
1003 | If inquiring about some other buffer, this swaps out any values | |
1004 | for that buffer, making the alist up to date automatically. */ | |
1005 | val = find_symbol_value (XCAR (elt)); | |
1006 | /* Use the current buffer value only if buf is the current buffer. */ | |
1007 | if (buf != current_buffer) | |
1008 | val = XCDR (elt); | |
1009 | ||
ce5b453a | 1010 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
1011 | } |
1012 | ||
1013 | return result; | |
1014 | } | |
1015 | ||
1ab256cb | 1016 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1017 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1018 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1019 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1020 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1021 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1022 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1023 | (register Lisp_Object buffer) |
1ab256cb RM |
1024 | { |
1025 | register struct buffer *buf; | |
553defa4 | 1026 | register Lisp_Object result; |
1ab256cb | 1027 | |
265a9e55 | 1028 | if (NILP (buffer)) |
1ab256cb RM |
1029 | buf = current_buffer; |
1030 | else | |
1031 | { | |
b7826503 | 1032 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1033 | buf = XBUFFER (buffer); |
1034 | } | |
1035 | ||
e1688f54 | 1036 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1037 | |
1ab256cb RM |
1038 | /* Add on all the variables stored in special slots. */ |
1039 | { | |
7c02e886 | 1040 | int offset, idx; |
1ab256cb | 1041 | |
3ee24aec SM |
1042 | /* buffer-local Lisp variables start at `undo_list', |
1043 | tho only the ones from `name' on are GC'd normally. */ | |
1044 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1045 | offset < sizeof (struct buffer); |
7c02e886 GM |
1046 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1047 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1048 | { |
7313acd0 GM |
1049 | idx = PER_BUFFER_IDX (offset); |
1050 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1051 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1052 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1053 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1054 | result); |
1ab256cb RM |
1055 | } |
1056 | } | |
553defa4 RS |
1057 | |
1058 | return result; | |
1ab256cb | 1059 | } |
1ab256cb | 1060 | \f |
16a97296 | 1061 | DEFUE ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1062 | 0, 1, 0, |
7ee72033 MB |
1063 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1064 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1065 | (register Lisp_Object buffer) |
1ab256cb RM |
1066 | { |
1067 | register struct buffer *buf; | |
265a9e55 | 1068 | if (NILP (buffer)) |
1ab256cb RM |
1069 | buf = current_buffer; |
1070 | else | |
1071 | { | |
b7826503 | 1072 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1073 | buf = XBUFFER (buffer); |
1074 | } | |
1075 | ||
336cd056 | 1076 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1077 | } |
1078 | ||
16a97296 | 1079 | DEFUE ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1080 | 1, 1, 0, |
7ee72033 MB |
1081 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1082 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1083 | (register Lisp_Object flag) |
1ab256cb RM |
1084 | { |
1085 | register int already; | |
1086 | register Lisp_Object fn; | |
8ec01c70 | 1087 | Lisp_Object buffer, window; |
1ab256cb RM |
1088 | |
1089 | #ifdef CLASH_DETECTION | |
1090 | /* If buffer becoming modified, lock the file. | |
1091 | If buffer becoming unmodified, unlock the file. */ | |
1092 | ||
4b4deea2 | 1093 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1094 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1095 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1096 | { |
336cd056 | 1097 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1098 | if (!already && !NILP (flag)) |
1ab256cb | 1099 | lock_file (fn); |
265a9e55 | 1100 | else if (already && NILP (flag)) |
1ab256cb RM |
1101 | unlock_file (fn); |
1102 | } | |
1103 | #endif /* CLASH_DETECTION */ | |
1104 | ||
0b5397c2 SM |
1105 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1106 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1107 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1108 | modify SAVE_MODIFF to affect one, we may affect the other | |
1109 | as well. | |
1110 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1111 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1112 | recent-auto-save-p from t to nil. | |
1113 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1114 | we risk changing recent-auto-save-p from nil to t. */ | |
1115 | SAVE_MODIFF = (NILP (flag) | |
1116 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1117 | ? MODIFF | |
1118 | /* Let's try to preserve recent-auto-save-p. */ | |
1119 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1120 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1121 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1122 | or increase MODIFF. */ | |
1123 | : MODIFF++); | |
177c0ea7 | 1124 | |
8ec01c70 GM |
1125 | /* Set update_mode_lines only if buffer is displayed in some window. |
1126 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1127 | state by recording/restoring the state around blocks of code. | |
1128 | Setting update_mode_lines makes redisplay consider all windows | |
1129 | (on all frames). Stealth fontification of buffers not displayed | |
1130 | would incur additional redisplay costs if we'd set | |
1131 | update_modes_lines unconditionally. | |
1132 | ||
1133 | Ideally, I think there should be another mechanism for fontifying | |
1134 | buffers without "modifying" buffers, or redisplay should be | |
1135 | smarter about updating the `*' in mode lines. --gerd */ | |
1136 | XSETBUFFER (buffer, current_buffer); | |
1137 | window = Fget_buffer_window (buffer, Qt); | |
1138 | if (WINDOWP (window)) | |
d57b83b3 GM |
1139 | { |
1140 | ++update_mode_lines; | |
1141 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1142 | } | |
177c0ea7 | 1143 | |
1ab256cb RM |
1144 | return flag; |
1145 | } | |
1146 | ||
a8c21b48 GM |
1147 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1148 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1149 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1150 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1151 | state of the current buffer. Use with care. */) |
5842a27b | 1152 | (Lisp_Object flag) |
a8c21b48 GM |
1153 | { |
1154 | #ifdef CLASH_DETECTION | |
1155 | Lisp_Object fn; | |
177c0ea7 | 1156 | |
a8c21b48 GM |
1157 | /* If buffer becoming modified, lock the file. |
1158 | If buffer becoming unmodified, unlock the file. */ | |
1159 | ||
4b4deea2 | 1160 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1161 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1162 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1163 | { |
1164 | int already = SAVE_MODIFF < MODIFF; | |
1165 | if (!already && !NILP (flag)) | |
1166 | lock_file (fn); | |
1167 | else if (already && NILP (flag)) | |
1168 | unlock_file (fn); | |
1169 | } | |
1170 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1171 | |
a8c21b48 GM |
1172 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1173 | return flag; | |
1174 | } | |
1175 | ||
1ab256cb | 1176 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1177 | 0, 1, 0, |
7ee72033 | 1178 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1179 | Each buffer has a tick counter which is incremented each time the |
1180 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1181 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1182 | (register Lisp_Object buffer) |
1ab256cb RM |
1183 | { |
1184 | register struct buffer *buf; | |
265a9e55 | 1185 | if (NILP (buffer)) |
1ab256cb RM |
1186 | buf = current_buffer; |
1187 | else | |
1188 | { | |
b7826503 | 1189 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1190 | buf = XBUFFER (buffer); |
1191 | } | |
1192 | ||
1193 | return make_number (BUF_MODIFF (buf)); | |
1194 | } | |
3e145152 CY |
1195 | |
1196 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1197 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1198 | doc: /* Return BUFFER's character-change tick counter. | |
1199 | Each buffer has a character-change tick counter, which is set to the | |
1200 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1201 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1202 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1203 | you can tell whether a character change occurred in that buffer in |
1204 | between these calls. No argument or nil as argument means use current | |
1205 | buffer as BUFFER. */) | |
5842a27b | 1206 | (register Lisp_Object buffer) |
3e145152 CY |
1207 | { |
1208 | register struct buffer *buf; | |
1209 | if (NILP (buffer)) | |
1210 | buf = current_buffer; | |
1211 | else | |
1212 | { | |
1213 | CHECK_BUFFER (buffer); | |
1214 | buf = XBUFFER (buffer); | |
1215 | } | |
1216 | ||
1217 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1218 | } | |
1ab256cb | 1219 | \f |
01050cb5 | 1220 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1221 | "(list (read-string \"Rename buffer (to new name): \" \ |
1222 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1223 | current-prefix-arg)", | |
7ee72033 | 1224 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1225 | If second arg UNIQUE is nil or omitted, it is an error if a |
1226 | buffer named NEWNAME already exists. | |
1227 | If UNIQUE is non-nil, come up with a new name using | |
1228 | `generate-new-buffer-name'. | |
1229 | Interactively, you can set UNIQUE with a prefix argument. | |
1230 | We return the name we actually gave the buffer. | |
7ee72033 | 1231 | This does not change the name of the visited file (if any). */) |
5842a27b | 1232 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1233 | { |
1234 | register Lisp_Object tem, buf; | |
1235 | ||
b7826503 | 1236 | CHECK_STRING (newname); |
d59698c4 | 1237 | |
d5db4077 | 1238 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1239 | error ("Empty string is invalid as a buffer name"); |
1240 | ||
489c043a | 1241 | tem = Fget_buffer (newname); |
265a9e55 | 1242 | if (!NILP (tem)) |
01050cb5 | 1243 | { |
8801a864 KR |
1244 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1245 | rename the buffer automatically so you can create another | |
1246 | with the original name. It makes UNIQUE equivalent to | |
1247 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1248 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1249 | return BVAR (current_buffer, name); |
3bd779aa | 1250 | if (!NILP (unique)) |
4b4deea2 | 1251 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1252 | else |
d5db4077 | 1253 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1254 | } |
1ab256cb | 1255 | |
4b4deea2 | 1256 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1257 | |
1258 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1259 | any windows displaying current_buffer will stay unchanged. */ | |
1260 | update_mode_lines++; | |
1261 | ||
67180c6a | 1262 | XSETBUFFER (buf, current_buffer); |
489c043a | 1263 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1264 | if (NILP (BVAR (current_buffer, filename)) |
1265 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1266 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c | 1267 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1268 | return BVAR (current_buffer, name); |
1ab256cb RM |
1269 | } |
1270 | ||
16a97296 | 1271 | DEFUE ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1272 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1273 | Buffers not visible in windows are preferred to visible buffers, |
1274 | unless optional second argument VISIBLE-OK is non-nil. | |
1275 | If the optional third argument FRAME is non-nil, use that frame's | |
1276 | buffer list instead of the selected frame's buffer list. | |
1277 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 | 1278 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
5842a27b | 1279 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1280 | { |
7962a441 | 1281 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1282 | notsogood = Qnil; |
1283 | ||
773fbdb9 | 1284 | if (NILP (frame)) |
9ba9623d | 1285 | frame = selected_frame; |
773fbdb9 | 1286 | |
d234d13e JL |
1287 | CHECK_FRAME (frame); |
1288 | ||
7962a441 | 1289 | tail = Vbuffer_alist; |
773fbdb9 | 1290 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1291 | |
1292 | /* Consider buffers that have been seen in the selected frame | |
1293 | before other buffers. */ | |
177c0ea7 | 1294 | |
773fbdb9 | 1295 | tem = frame_buffer_list (frame); |
7962a441 RS |
1296 | add_ons = Qnil; |
1297 | while (CONSP (tem)) | |
1298 | { | |
7539e11f KR |
1299 | if (BUFFERP (XCAR (tem))) |
1300 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1301 | tem = XCDR (tem); | |
7962a441 RS |
1302 | } |
1303 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1304 | ||
6d70a280 | 1305 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1306 | { |
6d70a280 | 1307 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1308 | if (EQ (buf, buffer)) |
1309 | continue; | |
6b61353c KH |
1310 | if (NILP (buf)) |
1311 | continue; | |
4b4deea2 | 1312 | if (NILP (BVAR (XBUFFER (buf), name))) |
6b61353c | 1313 | continue; |
4b4deea2 | 1314 | if (SREF (BVAR (XBUFFER (buf), name), 0) == ' ') |
1ab256cb | 1315 | continue; |
04ae1b48 RS |
1316 | /* If the selected frame has a buffer_predicate, |
1317 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1318 | if (!NILP (pred)) |
04ae1b48 | 1319 | { |
7962a441 | 1320 | tem = call1 (pred, buf); |
04ae1b48 RS |
1321 | if (NILP (tem)) |
1322 | continue; | |
1323 | } | |
04ae1b48 | 1324 | |
a0ebb746 | 1325 | if (NILP (visible_ok)) |
66ffe51c | 1326 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1327 | else |
1328 | tem = Qnil; | |
265a9e55 | 1329 | if (NILP (tem)) |
1ab256cb | 1330 | return buf; |
265a9e55 | 1331 | if (NILP (notsogood)) |
1ab256cb RM |
1332 | notsogood = buf; |
1333 | } | |
265a9e55 | 1334 | if (!NILP (notsogood)) |
1ab256cb | 1335 | return notsogood; |
dba1a30a GM |
1336 | buf = Fget_buffer (build_string ("*scratch*")); |
1337 | if (NILP (buf)) | |
1338 | { | |
1339 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1340 | Fset_buffer_major_mode (buf); | |
1341 | } | |
89132f25 | 1342 | return buf; |
1ab256cb RM |
1343 | } |
1344 | \f | |
16a97296 | 1345 | DEFUE ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1346 | 0, 1, "", |
7ee72033 MB |
1347 | doc: /* Start keeping undo information for buffer BUFFER. |
1348 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1349 | (register Lisp_Object buffer) |
1ab256cb | 1350 | { |
ffd56f97 | 1351 | Lisp_Object real_buffer; |
1ab256cb | 1352 | |
ffd56f97 | 1353 | if (NILP (buffer)) |
67180c6a | 1354 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1355 | else |
1356 | { | |
ffd56f97 JB |
1357 | real_buffer = Fget_buffer (buffer); |
1358 | if (NILP (real_buffer)) | |
1359 | nsberror (buffer); | |
1ab256cb RM |
1360 | } |
1361 | ||
4b4deea2 TT |
1362 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1363 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1364 | |
1365 | return Qnil; | |
1366 | } | |
1367 | ||
1368 | /* | |
00b3c7ac | 1369 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1370 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1371 | The buffer being killed will be current while the hook is running.\n\ | |
1372 | See `kill-buffer'." | |
1373 | */ | |
16a97296 | 1374 | DEFUE ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
c8804c4f MR |
1375 | doc: /* Kill buffer BUFFER-OR-NAME. |
1376 | The argument may be a buffer or the name of an existing buffer. | |
1377 | Argument nil or omitted means kill the current buffer. Return t if the | |
1378 | buffer is actually killed, nil otherwise. | |
1379 | ||
1380 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1381 | windows currently displaying the buffer to be killed. The functions in | |
1382 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1383 | the current buffer. If any of them returns nil, the buffer is not | |
1384 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1385 | actually killed. The buffer being killed will be current while the hook | |
1386 | is running. | |
018ba359 PJ |
1387 | |
1388 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1389 | with SIGHUP. */) |
5842a27b | 1390 | (Lisp_Object buffer_or_name) |
1ab256cb | 1391 | { |
c8804c4f | 1392 | Lisp_Object buffer; |
1ab256cb RM |
1393 | register struct buffer *b; |
1394 | register Lisp_Object tem; | |
1395 | register struct Lisp_Marker *m; | |
6af718a4 | 1396 | struct gcpro gcpro1; |
1ab256cb | 1397 | |
c8804c4f MR |
1398 | if (NILP (buffer_or_name)) |
1399 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1400 | else |
c8804c4f MR |
1401 | buffer = Fget_buffer (buffer_or_name); |
1402 | if (NILP (buffer)) | |
1403 | nsberror (buffer_or_name); | |
1ab256cb | 1404 | |
c8804c4f | 1405 | b = XBUFFER (buffer); |
1ab256cb | 1406 | |
4a4a9db5 | 1407 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1408 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1409 | return Qnil; |
1410 | ||
1ab256cb | 1411 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1412 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1413 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1414 | { |
c8804c4f | 1415 | GCPRO1 (buffer); |
5c4930b0 | 1416 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1417 | BVAR (b, name), make_number (0))); |
1ab256cb | 1418 | UNGCPRO; |
265a9e55 | 1419 | if (NILP (tem)) |
1ab256cb RM |
1420 | return Qnil; |
1421 | } | |
1422 | ||
dcdffbf6 | 1423 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1424 | { |
aed13378 | 1425 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1426 | Lisp_Object arglist[1]; |
1ab256cb RM |
1427 | |
1428 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1429 | set_buffer_internal (b); | |
dcdffbf6 RS |
1430 | |
1431 | /* First run the query functions; if any query is answered no, | |
1432 | don't kill the buffer. */ | |
5b20caf0 | 1433 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1434 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1435 | if (NILP (tem)) | |
5b20caf0 | 1436 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1437 | |
1438 | /* Then run the hooks. */ | |
f1597a3a | 1439 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1440 | unbind_to (count, Qnil); |
1441 | } | |
1442 | ||
1443 | /* We have no more questions to ask. Verify that it is valid | |
1444 | to kill the buffer. This must be done after the questions | |
1445 | since anything can happen within do_yes_or_no_p. */ | |
1446 | ||
1447 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1448 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1449 | return Qnil; |
1450 | ||
4b4deea2 | 1451 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1452 | return Qnil; |
1453 | ||
336cd056 RS |
1454 | /* When we kill a base buffer, kill all its indirect buffers. |
1455 | We do it at this stage so nothing terrible happens if they | |
1456 | ask questions or their hooks get errors. */ | |
1457 | if (! b->base_buffer) | |
1458 | { | |
1459 | struct buffer *other; | |
1460 | ||
c8804c4f | 1461 | GCPRO1 (buffer); |
336cd056 RS |
1462 | |
1463 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1464 | /* all_buffers contains dead buffers too; |
1465 | don't re-kill them. */ | |
4b4deea2 | 1466 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1467 | { |
8f54f30a PE |
1468 | Lisp_Object buf; |
1469 | XSETBUFFER (buf, other); | |
1470 | Fkill_buffer (buf); | |
336cd056 RS |
1471 | } |
1472 | ||
1473 | UNGCPRO; | |
1474 | } | |
177c0ea7 | 1475 | |
1ab256cb RM |
1476 | /* Make this buffer not be current. |
1477 | In the process, notice if this is the sole visible buffer | |
1478 | and give up if so. */ | |
1479 | if (b == current_buffer) | |
1480 | { | |
c8804c4f | 1481 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1482 | Fset_buffer (tem); |
1483 | if (b == current_buffer) | |
1484 | return Qnil; | |
1485 | } | |
1486 | ||
77270fac GM |
1487 | /* Notice if the buffer to kill is the sole visible buffer |
1488 | when we're currently in the mini-buffer, and give up if so. */ | |
1489 | XSETBUFFER (tem, current_buffer); | |
1490 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1491 | { | |
c8804c4f MR |
1492 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1493 | if (EQ (buffer, tem)) | |
77270fac GM |
1494 | return Qnil; |
1495 | } | |
1496 | ||
1ab256cb RM |
1497 | /* Now there is no question: we can kill the buffer. */ |
1498 | ||
1499 | #ifdef CLASH_DETECTION | |
1500 | /* Unlock this buffer's file, if it is locked. */ | |
1501 | unlock_buffer (b); | |
1502 | #endif /* CLASH_DETECTION */ | |
1503 | ||
c8804c4f MR |
1504 | GCPRO1 (buffer); |
1505 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1506 | UNGCPRO; |
1507 | ||
1508 | /* Killing buffer processes may run sentinels which may | |
1509 | have called kill-buffer. */ | |
1510 | ||
4b4deea2 | 1511 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1512 | return Qnil; |
1513 | ||
b93fb365 | 1514 | clear_charpos_cache (b); |
1ab256cb RM |
1515 | |
1516 | tem = Vinhibit_quit; | |
1517 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1518 | replace_buffer_in_all_windows (buffer); |
1519 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1520 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1521 | Vinhibit_quit = tem; |
1522 | ||
9cf712eb RS |
1523 | /* Delete any auto-save file, if we saved it in this session. |
1524 | But not if the buffer is modified. */ | |
4b4deea2 | 1525 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1526 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1527 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1528 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1529 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1530 | { |
8f54f30a PE |
1531 | Lisp_Object delete; |
1532 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1533 | if (! NILP (delete)) | |
4b4deea2 | 1534 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1535 | } |
1536 | ||
4a4a9db5 KH |
1537 | if (b->base_buffer) |
1538 | { | |
1539 | /* Unchain all markers that belong to this indirect buffer. | |
1540 | Don't unchain the markers that belong to the base buffer | |
1541 | or its other indirect buffers. */ | |
65745fad | 1542 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1543 | { |
65745fad | 1544 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1545 | if (m->buffer == b) |
65745fad SM |
1546 | unchain_marker (m); |
1547 | m = next; | |
4a4a9db5 KH |
1548 | } |
1549 | } | |
1550 | else | |
1ab256cb | 1551 | { |
4a4a9db5 | 1552 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1553 | and leave them pointing nowhere. */ |
65745fad | 1554 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1555 | { |
65745fad | 1556 | struct Lisp_Marker *next = m->next; |
336cd056 | 1557 | m->buffer = 0; |
65745fad SM |
1558 | m->next = NULL; |
1559 | m = next; | |
336cd056 | 1560 | } |
65745fad | 1561 | BUF_MARKERS (b) = NULL; |
336cd056 | 1562 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1563 | |
1564 | /* Perhaps we should explicitly free the interval tree here... */ | |
1565 | } | |
33f7013e | 1566 | |
2f3f993b RS |
1567 | /* Reset the local variables, so that this buffer's local values |
1568 | won't be protected from GC. They would be protected | |
1569 | if they happened to remain encached in their symbols. | |
1570 | This gets rid of them for certain. */ | |
1571 | swap_out_buffer_local_variables (b); | |
13de9290 | 1572 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1573 | |
4b4deea2 | 1574 | BVAR (b, name) = Qnil; |
336cd056 | 1575 | |
9ac0d9e0 | 1576 | BLOCK_INPUT; |
336cd056 | 1577 | if (! b->base_buffer) |
b86af064 | 1578 | free_buffer_text (b); |
336cd056 | 1579 | |
28e969dd JB |
1580 | if (b->newline_cache) |
1581 | { | |
1582 | free_region_cache (b->newline_cache); | |
1583 | b->newline_cache = 0; | |
1584 | } | |
1585 | if (b->width_run_cache) | |
1586 | { | |
1587 | free_region_cache (b->width_run_cache); | |
1588 | b->width_run_cache = 0; | |
1589 | } | |
4b4deea2 | 1590 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1591 | UNBLOCK_INPUT; |
4b4deea2 | 1592 | BVAR (b, undo_list) = Qnil; |
1ab256cb RM |
1593 | |
1594 | return Qt; | |
1595 | } | |
1596 | \f | |
36a8c287 JB |
1597 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1598 | we do this each time BUF is selected visibly, the more recently | |
1599 | selected buffers are always closer to the front of the list. This | |
1600 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1601 | |
01136e9b | 1602 | void |
d3da34e0 | 1603 | record_buffer (Lisp_Object buf) |
1ab256cb | 1604 | { |
8f54f30a | 1605 | register Lisp_Object list, prev; |
773fbdb9 | 1606 | Lisp_Object frame; |
9ba9623d | 1607 | frame = selected_frame; |
1ab256cb RM |
1608 | |
1609 | prev = Qnil; | |
8f54f30a | 1610 | for (list = Vbuffer_alist; CONSP (list); list = XCDR (list)) |
1ab256cb | 1611 | { |
8f54f30a | 1612 | if (EQ (XCDR (XCAR (list)), buf)) |
1ab256cb | 1613 | break; |
8f54f30a | 1614 | prev = list; |
1ab256cb RM |
1615 | } |
1616 | ||
8f54f30a | 1617 | /* Effectively do Vbuffer_alist = Fdelq (list, Vbuffer_alist); |
36a8c287 | 1618 | we cannot use Fdelq itself here because it allows quitting. */ |
1ab256cb | 1619 | |
265a9e55 | 1620 | if (NILP (prev)) |
7539e11f | 1621 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1622 | else |
f3fbd155 | 1623 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1624 | |
8f54f30a PE |
1625 | XSETCDR (list, Vbuffer_alist); |
1626 | Vbuffer_alist = list; | |
7962a441 | 1627 | |
a18b8cb5 | 1628 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1629 | |
a18b8cb5 | 1630 | prev = Qnil; |
8f54f30a PE |
1631 | for (list = XFRAME (frame)->buried_buffer_list; CONSP (list); |
1632 | list = XCDR (list)) | |
a18b8cb5 | 1633 | { |
8f54f30a | 1634 | if (EQ (XCAR (list), buf)) |
a18b8cb5 KL |
1635 | { |
1636 | if (NILP (prev)) | |
8f54f30a | 1637 | XFRAME (frame)->buried_buffer_list = XCDR (list); |
a18b8cb5 KL |
1638 | else |
1639 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1640 | break; | |
1641 | } | |
8f54f30a | 1642 | prev = list; |
a18b8cb5 KL |
1643 | } |
1644 | ||
7962a441 RS |
1645 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1646 | ||
1647 | prev = Qnil; | |
8f54f30a PE |
1648 | for (list = frame_buffer_list (frame); CONSP (list); |
1649 | list = XCDR (list)) | |
7962a441 | 1650 | { |
8f54f30a | 1651 | if (EQ (XCAR (list), buf)) |
7962a441 | 1652 | break; |
8f54f30a | 1653 | prev = list; |
7962a441 RS |
1654 | } |
1655 | ||
1656 | /* Effectively do delq. */ | |
1657 | ||
8f54f30a | 1658 | if (CONSP (list)) |
7962a441 RS |
1659 | { |
1660 | if (NILP (prev)) | |
773fbdb9 | 1661 | set_frame_buffer_list (frame, |
7539e11f | 1662 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1663 | else |
f3fbd155 | 1664 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1665 | |
8f54f30a PE |
1666 | XSETCDR (list, frame_buffer_list (frame)); |
1667 | set_frame_buffer_list (frame, list); | |
7962a441 RS |
1668 | } |
1669 | else | |
773fbdb9 | 1670 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1671 | } |
1672 | ||
a9ee7a59 | 1673 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1674 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1675 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1676 | according to `default-major-mode'. |
018ba359 | 1677 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1678 | the current buffer's major mode. */) |
5842a27b | 1679 | (Lisp_Object buffer) |
a9ee7a59 KH |
1680 | { |
1681 | int count; | |
1682 | Lisp_Object function; | |
1683 | ||
ea4fddd8 JB |
1684 | CHECK_BUFFER (buffer); |
1685 | ||
4b4deea2 TT |
1686 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1687 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1688 | function = find_symbol_value (intern ("initial-major-mode")); |
1689 | else | |
1690 | { | |
4b4deea2 | 1691 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1692 | if (NILP (function) |
4b4deea2 TT |
1693 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1694 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1695 | } |
177c0ea7 | 1696 | |
48265e61 DL |
1697 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1698 | return Qnil; | |
1699 | ||
aed13378 | 1700 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1701 | |
48265e61 DL |
1702 | /* To select a nonfundamental mode, |
1703 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1704 | |
1705 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1706 | ||
a2428fa2 | 1707 | Fset_buffer (buffer); |
48265e61 | 1708 | call0 (function); |
a9ee7a59 KH |
1709 | |
1710 | return unbind_to (count, Qnil); | |
1711 | } | |
1712 | ||
2594e0fd RS |
1713 | /* Switch to buffer BUFFER in the selected window. |
1714 | If NORECORD is non-nil, don't call record_buffer. */ | |
1715 | ||
c3bd59b5 | 1716 | static Lisp_Object |
d3da34e0 | 1717 | switch_to_buffer_1 (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1718 | { |
c8804c4f | 1719 | register Lisp_Object buffer; |
1ab256cb | 1720 | |
c8804c4f MR |
1721 | if (NILP (buffer_or_name)) |
1722 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1723 | else |
a9ee7a59 | 1724 | { |
c8804c4f MR |
1725 | buffer = Fget_buffer (buffer_or_name); |
1726 | if (NILP (buffer)) | |
a9ee7a59 | 1727 | { |
c8804c4f MR |
1728 | buffer = Fget_buffer_create (buffer_or_name); |
1729 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1730 | } |
1731 | } | |
c8804c4f | 1732 | Fset_buffer (buffer); |
265a9e55 | 1733 | if (NILP (norecord)) |
c8804c4f | 1734 | record_buffer (buffer); |
1ab256cb RM |
1735 | |
1736 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1737 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1738 | : selected_window, | |
c8804c4f | 1739 | buffer, Qnil); |
1ab256cb | 1740 | |
c8804c4f | 1741 | return buffer; |
1ab256cb RM |
1742 | } |
1743 | ||
88970542 JL |
1744 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1745 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1746 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1747 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1748 | nil. Return the buffer switched to. | |
a6dced2a | 1749 | |
ee50ff07 MR |
1750 | If BUFFER-OR-NAME is a string and does not identify an existing |
1751 | buffer, create a new buffer with that name. Interactively, if | |
1752 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1753 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1754 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1755 | |
ee50ff07 MR |
1756 | Optional second arg NORECORD non-nil means do not put this buffer |
1757 | at the front of the list of recently selected ones. This | |
1758 | function returns the buffer it switched to as a Lisp object. | |
1759 | ||
1760 | If the selected window is the minibuffer window or dedicated to | |
1761 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1762 | |
1763 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1764 | within a Lisp program! Use `set-buffer' instead. That avoids |
1765 | messing with the window-buffer correspondences. */) | |
5842a27b | 1766 | (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1767 | { |
c8804c4f | 1768 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1769 | { |
611ac521 RS |
1770 | /* Basically a NOP. Avoid signalling an error in the case where |
1771 | the selected window is dedicated, or a minibuffer. */ | |
1772 | ||
c8804c4f MR |
1773 | /* But do put this buffer at the front of the buffer list, unless |
1774 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1775 | at the front of the main buffer-list already, we still want to | |
1776 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1777 | if (NILP (norecord)) |
c8804c4f MR |
1778 | record_buffer (buffer_or_name); |
1779 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1780 | } |
61313fa3 SM |
1781 | else if (EQ (minibuf_window, selected_window) |
1782 | /* If `dedicated' is neither nil nor t, it means it's | |
1783 | dedicatedness can be overridden by an explicit request | |
1784 | such as a call to switch-to-buffer. */ | |
1785 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1786 | /* We can't use the selected window so let `pop-to-buffer' try some |
1787 | other window. */ | |
1788 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1789 | else | |
1790 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1791 | } |
1792 | ||
16a97296 | 1793 | DEFUE ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1794 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1795 | (void) |
1ab256cb RM |
1796 | { |
1797 | register Lisp_Object buf; | |
67180c6a | 1798 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1799 | return buf; |
1800 | } | |
1801 | \f | |
7ec44ec6 GM |
1802 | /* Set the current buffer to B. |
1803 | ||
1804 | We previously set windows_or_buffers_changed here to invalidate | |
1805 | global unchanged information in beg_unchanged and end_unchanged. | |
1806 | This is no longer necessary because we now compute unchanged | |
1807 | information on a buffer-basis. Every action affecting other | |
1808 | windows than the selected one requires a select_window at some | |
1809 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1810 | |
1811 | void | |
d3da34e0 | 1812 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1813 | { |
b5a225b4 | 1814 | if (current_buffer != b) |
7ec44ec6 | 1815 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1816 | } |
1817 | ||
1818 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1819 | This is used by redisplay. */ | |
1820 | ||
1821 | void | |
d3da34e0 | 1822 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1823 | { |
1824 | register struct buffer *old_buf; | |
ce5b453a | 1825 | register Lisp_Object tail; |
c7aa5005 | 1826 | |
b86af064 | 1827 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1828 | if (b->text->beg == NULL) |
b86af064 GM |
1829 | enlarge_buffer_text (b, 0); |
1830 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1831 | |
c7aa5005 KH |
1832 | if (current_buffer == b) |
1833 | return; | |
1834 | ||
1ab256cb RM |
1835 | old_buf = current_buffer; |
1836 | current_buffer = b; | |
1837 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1838 | ||
336cd056 RS |
1839 | if (old_buf) |
1840 | { | |
1841 | /* Put the undo list back in the base buffer, so that it appears | |
1842 | that an indirect buffer shares the undo list of its base. */ | |
1843 | if (old_buf->base_buffer) | |
4b4deea2 | 1844 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1845 | |
1846 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1847 | when it is not current, update them now. */ | |
cffc6f3b | 1848 | record_buffer_markers (old_buf); |
336cd056 RS |
1849 | } |
1850 | ||
1851 | /* Get the undo list from the base buffer, so that it appears | |
1852 | that an indirect buffer shares the undo list of its base. */ | |
1853 | if (b->base_buffer) | |
4b4deea2 | 1854 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1855 | |
1856 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1857 | when it is not current, fetch them now. */ | |
cffc6f3b | 1858 | fetch_buffer_markers (b); |
336cd056 | 1859 | |
1ab256cb RM |
1860 | /* Look down buffer's list of local Lisp variables |
1861 | to find and update any that forward into C variables. */ | |
1862 | ||
ce5b453a | 1863 | do |
1ab256cb | 1864 | { |
4b4deea2 | 1865 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1866 | { |
1867 | Lisp_Object var = XCAR (XCAR (tail)); | |
1868 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1869 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1870 | && SYMBOL_BLV (sym)->fwd) | |
1871 | /* Just reference the variable | |
1872 | to cause it to become set for this buffer. */ | |
1873 | Fsymbol_value (var); | |
1874 | } | |
1ab256cb | 1875 | } |
1ab256cb | 1876 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1877 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1878 | } |
1879 | ||
336cd056 | 1880 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1881 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1882 | |
1883 | void | |
d3da34e0 | 1884 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1885 | { |
1886 | register struct buffer *old_buf; | |
1887 | ||
1888 | if (current_buffer == b) | |
1889 | return; | |
1890 | ||
1891 | old_buf = current_buffer; | |
1892 | current_buffer = b; | |
1893 | ||
cffc6f3b CY |
1894 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1895 | when it is not current, update them now. */ | |
1896 | record_buffer_markers (old_buf); | |
336cd056 RS |
1897 | |
1898 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1899 | when it is not current, fetch them now. */ | |
cffc6f3b | 1900 | fetch_buffer_markers (b); |
336cd056 RS |
1901 | } |
1902 | ||
16a97296 | 1903 | DEFUE ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1904 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1905 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1906 | also `save-excursion' when you want to make a buffer current | |
1907 | temporarily. This function does not display the buffer, so its effect | |
1908 | ends when the current command terminates. Use `switch-to-buffer' or | |
1909 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1910 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1911 | { |
c8804c4f MR |
1912 | register Lisp_Object buffer; |
1913 | buffer = Fget_buffer (buffer_or_name); | |
1914 | if (NILP (buffer)) | |
1915 | nsberror (buffer_or_name); | |
4b4deea2 | 1916 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1917 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1918 | set_buffer_internal (XBUFFER (buffer)); |
1919 | return buffer; | |
1ab256cb | 1920 | } |
d0628b06 RS |
1921 | |
1922 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1923 | ||
1924 | Lisp_Object | |
d3da34e0 | 1925 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1926 | { |
4b4deea2 | 1927 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1928 | Fset_buffer (buffer); |
1929 | return Qnil; | |
1930 | } | |
1ab256cb | 1931 | \f |
16a97296 | 1932 | DEFUE ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1933 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1934 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1935 | (void) |
1ab256cb | 1936 | { |
4b4deea2 | 1937 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1938 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1939 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1940 | return Qnil; |
1941 | } | |
1942 | ||
1943 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 1944 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 1945 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
1946 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
1947 | default. | |
1948 | ||
1949 | The argument may be a buffer name or an actual buffer object. If | |
1950 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
1951 | from the selected window if it is displayed there. If the selected |
1952 | window is dedicated to its buffer, delete that window if there are other | |
1953 | windows on the same frame. If the selected window is the only window on | |
1954 | its frame, iconify that frame. */) | |
5842a27b | 1955 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1956 | { |
c8804c4f MR |
1957 | Lisp_Object buffer; |
1958 | ||
b271272a | 1959 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 1960 | if (NILP (buffer_or_name)) |
a5611885 | 1961 | { |
c58dab63 | 1962 | Lisp_Object tem; |
a2428fa2 | 1963 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1964 | |
c58dab63 | 1965 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1966 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1967 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1968 | { |
1969 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1970 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1971 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1972 | Ficonify_frame (Fwindow_frame (selected_window)); | |
1973 | else | |
1974 | Fdelete_window (selected_window); | |
1975 | } | |
a5611885 | 1976 | } |
1ab256cb RM |
1977 | else |
1978 | { | |
c8804c4f MR |
1979 | buffer = Fget_buffer (buffer_or_name); |
1980 | if (NILP (buffer)) | |
1981 | nsberror (buffer_or_name); | |
b271272a JB |
1982 | } |
1983 | ||
a1a8b28e GM |
1984 | /* Move buffer to the end of the buffer list. Do nothing if the |
1985 | buffer is killed. */ | |
4b4deea2 | 1986 | if (!NILP (BVAR (XBUFFER (buffer), name))) |
a1a8b28e | 1987 | { |
8f54f30a | 1988 | Lisp_Object aelt, list; |
b271272a | 1989 | |
a1a8b28e | 1990 | aelt = Frassq (buffer, Vbuffer_alist); |
8f54f30a | 1991 | list = Fmemq (aelt, Vbuffer_alist); |
a1a8b28e | 1992 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
8f54f30a PE |
1993 | XSETCDR (list, Qnil); |
1994 | Vbuffer_alist = nconc2 (Vbuffer_alist, list); | |
1ab256cb | 1995 | |
a18b8cb5 KL |
1996 | XFRAME (selected_frame)->buffer_list |
1997 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
1998 | XFRAME (selected_frame)->buried_buffer_list | |
1999 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2000 | } |
dec989eb | 2001 | |
1ab256cb RM |
2002 | return Qnil; |
2003 | } | |
2004 | \f | |
16a97296 | 2005 | DEFUE ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2006 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2007 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2008 | so the buffer is truly empty after this. */) |
5842a27b | 2009 | (void) |
1ab256cb RM |
2010 | { |
2011 | Fwiden (); | |
c0d9a0c3 GM |
2012 | |
2013 | del_range (BEG, Z); | |
c280bc6a | 2014 | |
1ab256cb RM |
2015 | current_buffer->last_window_start = 1; |
2016 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2017 | if future size is less than past size. Use of erase-buffer | |
2018 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 2019 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
2020 | return Qnil; |
2021 | } | |
2022 | ||
01136e9b | 2023 | void |
d3da34e0 | 2024 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2025 | { |
b7826503 PJ |
2026 | CHECK_NUMBER_COERCE_MARKER (*b); |
2027 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2028 | |
2029 | if (XINT (*b) > XINT (*e)) | |
2030 | { | |
03192067 KH |
2031 | Lisp_Object tem; |
2032 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2033 | } |
2034 | ||
2035 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2036 | && XINT (*e) <= ZV)) | |
2037 | args_out_of_range (*b, *e); | |
2038 | } | |
2039 | \f | |
b05525fa RS |
2040 | /* Advance BYTE_POS up to a character boundary |
2041 | and return the adjusted position. */ | |
2042 | ||
2043 | static int | |
145582a0 | 2044 | advance_to_char_boundary (EMACS_INT byte_pos) |
b05525fa | 2045 | { |
f8449323 | 2046 | int c; |
b05525fa | 2047 | |
f8449323 RS |
2048 | if (byte_pos == BEG) |
2049 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2050 | return BEG; |
f8449323 RS |
2051 | |
2052 | c = FETCH_BYTE (byte_pos); | |
2053 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2054 | { |
1be6387d | 2055 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2056 | multibyte sequence. */ |
145582a0 | 2057 | EMACS_INT orig_byte_pos = byte_pos; |
a9bcded1 KH |
2058 | |
2059 | do | |
2060 | { | |
2061 | byte_pos--; | |
2062 | c = FETCH_BYTE (byte_pos); | |
2063 | } | |
2064 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2065 | INC_POS (byte_pos); |
a9bcded1 KH |
2066 | if (byte_pos < orig_byte_pos) |
2067 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2068 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2069 | surely advance to the correct character boundary. If C is | |
2070 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2071 | } |
2072 | ||
20773569 | 2073 | return byte_pos; |
b05525fa RS |
2074 | } |
2075 | ||
baae5c2d | 2076 | #ifdef REL_ALLOC |
f57e2426 | 2077 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2078 | #endif /* REL_ALLOC */ |
2079 | ||
13cda5f9 SM |
2080 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2081 | 1, 1, 0, | |
2082 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2083 | (Lisp_Object buffer) |
13cda5f9 SM |
2084 | { |
2085 | struct buffer *other_buffer; | |
2086 | CHECK_BUFFER (buffer); | |
2087 | other_buffer = XBUFFER (buffer); | |
2088 | ||
4b4deea2 | 2089 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2090 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2091 | |
13cda5f9 SM |
2092 | /* Actually, it probably works just fine. |
2093 | * if (other_buffer == current_buffer) | |
2094 | * error ("Cannot swap a buffer's text with itself"); */ | |
2095 | ||
2096 | /* Actually, this may be workable as well, tho probably only if they're | |
2097 | *both* indirect. */ | |
2098 | if (other_buffer->base_buffer | |
2099 | || current_buffer->base_buffer) | |
2100 | error ("Cannot swap indirect buffers's text"); | |
2101 | ||
2102 | { /* This is probably harder to make work. */ | |
2103 | struct buffer *other; | |
2104 | for (other = all_buffers; other; other = other->next) | |
2105 | if (other->base_buffer == other_buffer | |
2106 | || other->base_buffer == current_buffer) | |
2107 | error ("One of the buffers to swap has indirect buffers"); | |
2108 | } | |
2109 | ||
2110 | #define swapfield(field, type) \ | |
2111 | do { \ | |
2112 | type tmp##field = other_buffer->field; \ | |
2113 | other_buffer->field = current_buffer->field; \ | |
2114 | current_buffer->field = tmp##field; \ | |
2115 | } while (0) | |
5d8ea120 TT |
2116 | #define swapfield_(field, type) \ |
2117 | do { \ | |
4b4deea2 TT |
2118 | type tmp##field = BVAR (other_buffer, field); \ |
2119 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2120 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2121 | } while (0) |
13cda5f9 SM |
2122 | |
2123 | swapfield (own_text, struct buffer_text); | |
2124 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2125 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2126 | #ifdef REL_ALLOC |
40b615d6 JR |
2127 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2128 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2129 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2130 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2131 | #endif /* REL_ALLOC */ |
2132 | ||
13cda5f9 SM |
2133 | swapfield (pt, EMACS_INT); |
2134 | swapfield (pt_byte, EMACS_INT); | |
2135 | swapfield (begv, EMACS_INT); | |
2136 | swapfield (begv_byte, EMACS_INT); | |
2137 | swapfield (zv, EMACS_INT); | |
2138 | swapfield (zv_byte, EMACS_INT); | |
2139 | eassert (!current_buffer->base_buffer); | |
2140 | eassert (!other_buffer->base_buffer); | |
2141 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2142 | swapfield (newline_cache, struct region_cache *); | |
2143 | swapfield (width_run_cache, struct region_cache *); | |
2144 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2145 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2146 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2147 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2148 | swapfield (overlay_center, EMACS_INT); | |
5d8ea120 TT |
2149 | swapfield_ (undo_list, Lisp_Object); |
2150 | swapfield_ (mark, Lisp_Object); | |
2151 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2152 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2153 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2154 | /* FIXME: Not sure what we should do with these *_marker fields. |
2155 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2156 | swapfield_ (pt_marker, Lisp_Object); |
2157 | swapfield_ (begv_marker, Lisp_Object); | |
2158 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2159 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2160 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2161 | |
2162 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2163 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2164 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2165 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2166 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2167 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2168 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2169 | { |
2170 | struct Lisp_Marker *m; | |
2171 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2172 | if (m->buffer == other_buffer) | |
2173 | m->buffer = current_buffer; | |
b8ff72fa SM |
2174 | else |
2175 | /* Since there's no indirect buffer in sight, markers on | |
2176 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2177 | eassert (!m->buffer); | |
13cda5f9 SM |
2178 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2179 | if (m->buffer == current_buffer) | |
2180 | m->buffer = other_buffer; | |
b8ff72fa SM |
2181 | else |
2182 | /* Since there's no indirect buffer in sight, markers on | |
2183 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2184 | eassert (!m->buffer); | |
13cda5f9 | 2185 | } |
126f1fc1 SM |
2186 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2187 | So since we just swapped the markers between the two buffers, we need | |
2188 | to undo the effect of this swap for window markers. */ | |
2189 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2190 | Lisp_Object buf1, buf2; | |
2191 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2192 | ||
2193 | while (NILP (Fmemq (w, ws))) | |
2194 | { | |
2195 | ws = Fcons (w, ws); | |
2196 | if (MARKERP (XWINDOW (w)->pointm) | |
2197 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2198 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2199 | Fset_marker (XWINDOW (w)->pointm, | |
2200 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2201 | XWINDOW (w)->buffer); | |
2202 | w = Fnext_window (w, Qt, Qt); | |
2203 | } | |
2204 | } | |
2205 | ||
13cda5f9 SM |
2206 | if (current_buffer->text->intervals) |
2207 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2208 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2209 | if (other_buffer->text->intervals) | |
2210 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2211 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2212 | ||
2213 | return Qnil; | |
2214 | } | |
2215 | ||
16a97296 | 2216 | DEFUE ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2217 | 1, 1, 0, |
7ee72033 | 2218 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2219 | If FLAG is t, this makes the buffer a multibyte buffer. |
2220 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2221 | In these cases, the buffer contents remain unchanged as a sequence of |
2222 | bytes but the contents viewed as characters do change. | |
2223 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2224 | all eight-bit bytes to eight-bit characters. |
2225 | If the multibyte flag was really changed, undo information of the | |
2226 | current buffer is cleared. */) | |
5842a27b | 2227 | (Lisp_Object flag) |
3ac81adb | 2228 | { |
65745fad | 2229 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2230 | struct buffer *other; |
145582a0 | 2231 | EMACS_INT begv, zv; |
8d1203ea | 2232 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2233 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2234 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2235 | struct gcpro gcpro1; |
3ac81adb | 2236 | |
6e553d5e RS |
2237 | if (current_buffer->base_buffer) |
2238 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2239 | ||
70e77119 | 2240 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2241 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2242 | return flag; |
2243 | ||
38babc07 KS |
2244 | GCPRO1 (old_undo); |
2245 | ||
2246 | /* Don't record these buffer changes. We will put a special undo entry | |
2247 | instead. */ | |
4b4deea2 | 2248 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2249 | |
3ac81adb RS |
2250 | /* If the cached position is for this buffer, clear it out. */ |
2251 | clear_charpos_cache (current_buffer); | |
2252 | ||
458c8af4 KH |
2253 | if (NILP (flag)) |
2254 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2255 | else | |
2256 | begv = BEGV, zv = ZV; | |
2257 | ||
a9bcded1 KH |
2258 | if (narrowed) |
2259 | Fwiden (); | |
2260 | ||
3ac81adb RS |
2261 | if (NILP (flag)) |
2262 | { | |
145582a0 | 2263 | EMACS_INT pos, stop; |
a9bcded1 KH |
2264 | unsigned char *p; |
2265 | ||
3ac81adb RS |
2266 | /* Do this first, so it can use CHAR_TO_BYTE |
2267 | to calculate the old correspondences. */ | |
2268 | set_intervals_multibyte (0); | |
2269 | ||
4b4deea2 | 2270 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2271 | |
2272 | Z = Z_BYTE; | |
2273 | BEGV = BEGV_BYTE; | |
2274 | ZV = ZV_BYTE; | |
2275 | GPT = GPT_BYTE; | |
2276 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2277 | ||
60ebfdf3 | 2278 | |
65745fad SM |
2279 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2280 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2281 | |
2282 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2283 | pos = BEG; | |
2284 | stop = GPT; | |
2285 | p = BEG_ADDR; | |
2286 | while (1) | |
2287 | { | |
2288 | int c, bytes; | |
2289 | ||
2290 | if (pos == stop) | |
2291 | { | |
2292 | if (pos == Z) | |
2293 | break; | |
2294 | p = GAP_END_ADDR; | |
2295 | stop = Z; | |
2296 | } | |
8f348ed5 KH |
2297 | if (ASCII_BYTE_P (*p)) |
2298 | p++, pos++; | |
2299 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2300 | { |
62a6e103 | 2301 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2302 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2303 | last one, and change the last one to the character |
a9bcded1 KH |
2304 | code. */ |
2305 | bytes--; | |
2306 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2307 | p = GAP_END_ADDR; | |
2308 | *p++ = c; | |
2309 | pos++; | |
2310 | if (begv > pos) | |
2311 | begv -= bytes; | |
2312 | if (zv > pos) | |
2313 | zv -= bytes; | |
2314 | stop = Z; | |
2315 | } | |
8f924df7 | 2316 | else |
8f348ed5 KH |
2317 | { |
2318 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2319 | p += bytes, pos += bytes; | |
2320 | } | |
a9bcded1 KH |
2321 | } |
2322 | if (narrowed) | |
2323 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2324 | } |
2325 | else | |
2326 | { | |
145582a0 EZ |
2327 | EMACS_INT pt = PT; |
2328 | EMACS_INT pos, stop; | |
8f348ed5 | 2329 | unsigned char *p, *pend; |
a9bcded1 | 2330 | |
673c57d2 | 2331 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2332 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2333 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2334 | |
8f924df7 | 2335 | if (EQ (flag, Qt) |
a3a303df | 2336 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2337 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2338 | { | |
8f54f30a | 2339 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2340 | |
8f54f30a PE |
2341 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2342 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2343 | { |
8f54f30a | 2344 | EMACS_INT new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2345 | |
2346 | move_gap_both (new_gpt, new_gpt); | |
2347 | } | |
2348 | } | |
2349 | ||
a9bcded1 KH |
2350 | /* Make the buffer contents valid as multibyte by converting |
2351 | 8-bit characters to multibyte form. */ | |
2352 | pos = BEG; | |
2353 | stop = GPT; | |
2354 | p = BEG_ADDR; | |
8f348ed5 | 2355 | pend = GPT_ADDR; |
a9bcded1 KH |
2356 | while (1) |
2357 | { | |
2358 | int bytes; | |
2359 | ||
2360 | if (pos == stop) | |
2361 | { | |
2362 | if (pos == Z) | |
2363 | break; | |
2364 | p = GAP_END_ADDR; | |
8f348ed5 | 2365 | pend = Z_ADDR; |
a9bcded1 KH |
2366 | stop = Z; |
2367 | } | |
177c0ea7 | 2368 | |
a3a303df KH |
2369 | if (ASCII_BYTE_P (*p)) |
2370 | p++, pos++; | |
dcfb9bc4 KH |
2371 | else if (EQ (flag, Qt) |
2372 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2373 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2374 | p += bytes, pos += bytes; |
2375 | else | |
2376 | { | |
2377 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2378 | int c; |
a9bcded1 | 2379 | |
8f924df7 | 2380 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2381 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2382 | *p = tmp[0]; |
2383 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2384 | bytes--; | |
b68864e5 | 2385 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2386 | /* Now the gap is after the just inserted data. */ |
2387 | pos = GPT; | |
2388 | p = GAP_END_ADDR; | |
2389 | if (pos <= begv) | |
2390 | begv += bytes; | |
2391 | if (pos <= zv) | |
2392 | zv += bytes; | |
2393 | if (pos <= pt) | |
2394 | pt += bytes; | |
31285a8f | 2395 | pend = Z_ADDR; |
a9bcded1 KH |
2396 | stop = Z; |
2397 | } | |
2398 | } | |
2399 | ||
2400 | if (pt != PT) | |
2401 | TEMP_SET_PT (pt); | |
2402 | ||
2403 | if (narrowed) | |
2404 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2405 | ||
3ac81adb RS |
2406 | /* Do this first, so that chars_in_text asks the right question. |
2407 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2408 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2409 | |
b05525fa | 2410 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2411 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2412 | |
673c57d2 | 2413 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2414 | |
2415 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2416 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2417 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2418 | else |
2419 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2420 | |
2421 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2422 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2423 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2424 | else |
2425 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2426 | |
2427 | { | |
8f54f30a PE |
2428 | EMACS_INT byte = advance_to_char_boundary (PT_BYTE); |
2429 | EMACS_INT position; | |
b05525fa | 2430 | |
8f54f30a PE |
2431 | if (byte > GPT_BYTE) |
2432 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2433 | else |
8f54f30a PE |
2434 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2435 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2436 | } |
3ac81adb RS |
2437 | |
2438 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2439 | |
2440 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2441 | getting confused by the markers that have not yet been updated. | |
2442 | It is also a signal that it should never create a marker. */ | |
65745fad | 2443 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2444 | |
65745fad | 2445 | for (; tail; tail = tail->next) |
3ac81adb | 2446 | { |
65745fad SM |
2447 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2448 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2449 | } |
b69f9797 RS |
2450 | |
2451 | /* Make sure no markers were put on the chain | |
2452 | while the chain value was incorrect. */ | |
65745fad | 2453 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2454 | abort (); |
2455 | ||
3ac81adb RS |
2456 | BUF_MARKERS (current_buffer) = markers; |
2457 | ||
2458 | /* Do this last, so it can calculate the new correspondences | |
2459 | between chars and bytes. */ | |
2460 | set_intervals_multibyte (1); | |
2461 | } | |
2462 | ||
38babc07 KS |
2463 | if (!EQ (old_undo, Qt)) |
2464 | { | |
2465 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2466 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2467 | intern ("set-buffer-multibyte"), |
2468 | NILP (flag) ? Qt : Qnil), | |
2469 | old_undo); | |
38babc07 KS |
2470 | } |
2471 | ||
2472 | UNGCPRO; | |
a9bcded1 | 2473 | |
724b203f GM |
2474 | /* Changing the multibyteness of a buffer means that all windows |
2475 | showing that buffer must be updated thoroughly. */ | |
2476 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2477 | ++windows_or_buffers_changed; | |
2478 | ||
abc9d959 RS |
2479 | /* Copy this buffer's new multibyte status |
2480 | into all of its indirect buffers. */ | |
2481 | for (other = all_buffers; other; other = other->next) | |
4b4deea2 | 2482 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2483 | { |
4b4deea2 TT |
2484 | BVAR (other, enable_multibyte_characters) |
2485 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2486 | other->prevent_redisplay_optimizations_p = 1; |
2487 | } | |
abc9d959 | 2488 | |
ed00559d KH |
2489 | /* Restore the modifiedness of the buffer. */ |
2490 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2491 | Fset_buffer_modified_p (Qnil); | |
2492 | ||
172f9454 KH |
2493 | /* Update coding systems of this buffer's process (if any). */ |
2494 | { | |
2495 | Lisp_Object process; | |
2496 | ||
2497 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2498 | if (PROCESSP (process)) | |
2499 | setup_process_coding_systems (process); | |
2500 | } | |
2501 | ||
3ac81adb RS |
2502 | return flag; |
2503 | } | |
2504 | \f | |
16a97296 PE |
2505 | DEFUE ("kill-all-local-variables", Fkill_all_local_variables, |
2506 | Skill_all_local_variables, 0, 0, 0, | |
7ee72033 | 2507 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2508 | Most local variable bindings are eliminated so that the default values |
2509 | become effective once more. Also, the syntax table is set from | |
2510 | `standard-syntax-table', the local keymap is set to nil, | |
2511 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2512 | This function also forces redisplay of the mode line. | |
2513 | ||
2514 | Every function to select a new major mode starts by | |
2515 | calling this function. | |
2516 | ||
2517 | As a special exception, local variables whose names have | |
2518 | a non-nil `permanent-local' property are not eliminated by this function. | |
2519 | ||
2520 | The first thing this function does is run | |
7ee72033 | 2521 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2522 | (void) |
1ab256cb | 2523 | { |
dee091a3 | 2524 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2525 | |
3709505e | 2526 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2527 | remain swapped in, in their symbols. */ |
1ab256cb | 2528 | |
2f3f993b | 2529 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2530 | |
2531 | /* Actually eliminate all local bindings of this buffer. */ | |
2532 | ||
13de9290 | 2533 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2534 | |
1ab256cb RM |
2535 | /* Force mode-line redisplay. Useful here because all major mode |
2536 | commands call this function. */ | |
2537 | update_mode_lines++; | |
2538 | ||
2539 | return Qnil; | |
2540 | } | |
2f3f993b RS |
2541 | |
2542 | /* Make sure no local variables remain set up with buffer B | |
2543 | for their current values. */ | |
2544 | ||
2545 | static void | |
d3da34e0 | 2546 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2547 | { |
ce5b453a | 2548 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2549 | |
2550 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2551 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2552 | |
67ee9f6e | 2553 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2554 | { |
ce5b453a SM |
2555 | Lisp_Object sym = XCAR (XCAR (alist)); |
2556 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2557 | /* Need not do anything if some other buffer's binding is | |
2558 | now encached. */ | |
2559 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2560 | { |
e7c10f83 SM |
2561 | /* Symbol is set up for this buffer's old local value: |
2562 | swap it out! */ | |
ce5b453a | 2563 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2564 | } |
2565 | } | |
2566 | } | |
1ab256cb | 2567 | \f |
2eec3b4e | 2568 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2569 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2570 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2571 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2572 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2573 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2574 | or where an overlay starts which ends at or after POS; |
624d2678 | 2575 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2576 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2577 | |
2578 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2579 | when this function is called. |
2580 | ||
2581 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2582 | If EXTEND is zero, we never extend the vector, | |
2583 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2584 | But we still return the total number of overlays. |
2585 | ||
2586 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2587 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2588 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2589 | |
2590 | int | |
d3da34e0 JB |
2591 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2592 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2593 | { |
2410d73a SM |
2594 | Lisp_Object overlay, start, end; |
2595 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2596 | int idx = 0; |
2597 | int len = *len_ptr; | |
2598 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2599 | EMACS_INT next = ZV; |
2600 | EMACS_INT prev = BEGV; | |
61d54cd5 RS |
2601 | int inhibit_storing = 0; |
2602 | ||
2410d73a | 2603 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2604 | { |
145582a0 | 2605 | EMACS_INT startpos, endpos; |
52f8ec73 | 2606 | |
2410d73a | 2607 | XSETMISC (overlay, tail); |
1ab256cb | 2608 | |
2eec3b4e RS |
2609 | start = OVERLAY_START (overlay); |
2610 | end = OVERLAY_END (overlay); | |
239c932b RS |
2611 | endpos = OVERLAY_POSITION (end); |
2612 | if (endpos < pos) | |
2613 | { | |
2614 | if (prev < endpos) | |
2615 | prev = endpos; | |
2616 | break; | |
2617 | } | |
413e06a4 RS |
2618 | startpos = OVERLAY_POSITION (start); |
2619 | /* This one ends at or after POS | |
daa1c109 | 2620 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2621 | if (prev < startpos && startpos < pos) |
2622 | prev = startpos; | |
239c932b RS |
2623 | if (endpos == pos) |
2624 | continue; | |
2eec3b4e RS |
2625 | if (startpos <= pos) |
2626 | { | |
2627 | if (idx == len) | |
2628 | { | |
61d54cd5 RS |
2629 | /* The supplied vector is full. |
2630 | Either make it bigger, or don't store any more in it. */ | |
2631 | if (extend) | |
2632 | { | |
0552666b GM |
2633 | /* Make it work with an initial len == 0. */ |
2634 | len *= 2; | |
2635 | if (len == 0) | |
2636 | len = 4; | |
2637 | *len_ptr = len; | |
61d54cd5 RS |
2638 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2639 | *vec_ptr = vec; | |
2640 | } | |
2641 | else | |
2642 | inhibit_storing = 1; | |
2eec3b4e | 2643 | } |
61d54cd5 RS |
2644 | |
2645 | if (!inhibit_storing) | |
2646 | vec[idx] = overlay; | |
2647 | /* Keep counting overlays even if we can't return them all. */ | |
2648 | idx++; | |
2eec3b4e RS |
2649 | } |
2650 | else if (startpos < next) | |
2651 | next = startpos; | |
2652 | } | |
2653 | ||
2410d73a | 2654 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2655 | { |
145582a0 | 2656 | EMACS_INT startpos, endpos; |
52f8ec73 | 2657 | |
2410d73a | 2658 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2659 | |
2660 | start = OVERLAY_START (overlay); | |
2661 | end = OVERLAY_END (overlay); | |
2662 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2663 | if (pos < startpos) |
2eec3b4e RS |
2664 | { |
2665 | if (startpos < next) | |
2666 | next = startpos; | |
2667 | break; | |
2668 | } | |
239c932b RS |
2669 | endpos = OVERLAY_POSITION (end); |
2670 | if (pos < endpos) | |
2eec3b4e RS |
2671 | { |
2672 | if (idx == len) | |
2673 | { | |
61d54cd5 RS |
2674 | if (extend) |
2675 | { | |
4b0e44fc RS |
2676 | /* Make it work with an initial len == 0. */ |
2677 | len *= 2; | |
0552666b | 2678 | if (len == 0) |
4b0e44fc RS |
2679 | len = 4; |
2680 | *len_ptr = len; | |
61d54cd5 RS |
2681 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2682 | *vec_ptr = vec; | |
2683 | } | |
2684 | else | |
2685 | inhibit_storing = 1; | |
2eec3b4e | 2686 | } |
61d54cd5 RS |
2687 | |
2688 | if (!inhibit_storing) | |
2689 | vec[idx] = overlay; | |
2690 | idx++; | |
413e06a4 RS |
2691 | |
2692 | if (startpos < pos && startpos > prev) | |
2693 | prev = startpos; | |
2eec3b4e | 2694 | } |
239c932b RS |
2695 | else if (endpos < pos && endpos > prev) |
2696 | prev = endpos; | |
1d5f4c1d MB |
2697 | else if (endpos == pos && startpos > prev |
2698 | && (!change_req || startpos < pos)) | |
413e06a4 | 2699 | prev = startpos; |
1ab256cb RM |
2700 | } |
2701 | ||
239c932b RS |
2702 | if (next_ptr) |
2703 | *next_ptr = next; | |
2704 | if (prev_ptr) | |
2705 | *prev_ptr = prev; | |
2eec3b4e RS |
2706 | return idx; |
2707 | } | |
74514898 | 2708 | \f |
7723e095 MR |
2709 | /* Find all the overlays in the current buffer that overlap the range |
2710 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2711 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2712 | |
177c0ea7 | 2713 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2714 | Store in *LEN_PTR the size allocated for the vector. |
2715 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2716 | or ZV if there are no more overlays. | |
2717 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2718 | or BEGV if there are no previous overlays. | |
2719 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2720 | ||
2721 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2722 | when this function is called. | |
2723 | ||
2724 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2725 | If EXTEND is zero, we never extend the vector, | |
2726 | and we store only as many overlays as will fit. | |
2727 | But we still return the total number of overlays. */ | |
2728 | ||
a9b9a780 | 2729 | static int |
145582a0 EZ |
2730 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
2731 | Lisp_Object **vec_ptr, int *len_ptr, | |
2732 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr) | |
74514898 | 2733 | { |
2410d73a SM |
2734 | Lisp_Object overlay, ostart, oend; |
2735 | struct Lisp_Overlay *tail; | |
74514898 RS |
2736 | int idx = 0; |
2737 | int len = *len_ptr; | |
2738 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2739 | EMACS_INT next = ZV; |
2740 | EMACS_INT prev = BEGV; | |
74514898 | 2741 | int inhibit_storing = 0; |
7723e095 | 2742 | int end_is_Z = end == Z; |
74514898 | 2743 | |
2410d73a | 2744 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2745 | { |
145582a0 | 2746 | EMACS_INT startpos, endpos; |
74514898 | 2747 | |
2410d73a | 2748 | XSETMISC (overlay, tail); |
74514898 RS |
2749 | |
2750 | ostart = OVERLAY_START (overlay); | |
2751 | oend = OVERLAY_END (overlay); | |
2752 | endpos = OVERLAY_POSITION (oend); | |
2753 | if (endpos < beg) | |
2754 | { | |
2755 | if (prev < endpos) | |
2756 | prev = endpos; | |
2757 | break; | |
2758 | } | |
2759 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2760 | /* Count an interval if it overlaps the range, is empty at the |
2761 | start of the range, or is empty at END provided END denotes the | |
2762 | end of the buffer. */ | |
74514898 | 2763 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2764 | || (startpos == endpos |
2765 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2766 | { |
2767 | if (idx == len) | |
2768 | { | |
2769 | /* The supplied vector is full. | |
2770 | Either make it bigger, or don't store any more in it. */ | |
2771 | if (extend) | |
2772 | { | |
4b0e44fc RS |
2773 | /* Make it work with an initial len == 0. */ |
2774 | len *= 2; | |
2775 | if (len == 0) | |
2776 | len = 4; | |
2777 | *len_ptr = len; | |
74514898 RS |
2778 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2779 | *vec_ptr = vec; | |
2780 | } | |
2781 | else | |
2782 | inhibit_storing = 1; | |
2783 | } | |
2784 | ||
2785 | if (!inhibit_storing) | |
2786 | vec[idx] = overlay; | |
2787 | /* Keep counting overlays even if we can't return them all. */ | |
2788 | idx++; | |
2789 | } | |
2790 | else if (startpos < next) | |
2791 | next = startpos; | |
2792 | } | |
2793 | ||
2410d73a | 2794 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2795 | { |
145582a0 | 2796 | EMACS_INT startpos, endpos; |
74514898 | 2797 | |
2410d73a | 2798 | XSETMISC (overlay, tail); |
74514898 RS |
2799 | |
2800 | ostart = OVERLAY_START (overlay); | |
2801 | oend = OVERLAY_END (overlay); | |
2802 | startpos = OVERLAY_POSITION (ostart); | |
2803 | if (end < startpos) | |
2804 | { | |
2805 | if (startpos < next) | |
2806 | next = startpos; | |
2807 | break; | |
2808 | } | |
2809 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2810 | /* Count an interval if it overlaps the range, is empty at the |
2811 | start of the range, or is empty at END provided END denotes the | |
2812 | end of the buffer. */ | |
74514898 | 2813 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2814 | || (startpos == endpos |
2815 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2816 | { |
2817 | if (idx == len) | |
2818 | { | |
2819 | if (extend) | |
2820 | { | |
4b0e44fc RS |
2821 | /* Make it work with an initial len == 0. */ |
2822 | len *= 2; | |
2823 | if (len == 0) | |
2824 | len = 4; | |
2825 | *len_ptr = len; | |
74514898 RS |
2826 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2827 | *vec_ptr = vec; | |
2828 | } | |
2829 | else | |
2830 | inhibit_storing = 1; | |
2831 | } | |
2832 | ||
2833 | if (!inhibit_storing) | |
2834 | vec[idx] = overlay; | |
2835 | idx++; | |
2836 | } | |
2837 | else if (endpos < beg && endpos > prev) | |
2838 | prev = endpos; | |
2839 | } | |
fc04fa47 | 2840 | |
74514898 RS |
2841 | if (next_ptr) |
2842 | *next_ptr = next; | |
2843 | if (prev_ptr) | |
2844 | *prev_ptr = prev; | |
2845 | return idx; | |
2846 | } | |
09a22085 GM |
2847 | |
2848 | ||
2849 | /* Return non-zero if there exists an overlay with a non-nil | |
2850 | `mouse-face' property overlapping OVERLAY. */ | |
2851 | ||
2852 | int | |
d3da34e0 | 2853 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2854 | { |
145582a0 EZ |
2855 | EMACS_INT start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2856 | EMACS_INT end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2857 | int n, i, size; |
09a22085 | 2858 | Lisp_Object *v, tem; |
177c0ea7 | 2859 | |
bfd8410f GM |
2860 | size = 10; |
2861 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2862 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2863 | if (n > size) | |
09a22085 | 2864 | { |
09a22085 GM |
2865 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2866 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2867 | } | |
2868 | ||
2869 | for (i = 0; i < n; ++i) | |
2870 | if (!EQ (v[i], overlay) | |
2871 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2872 | !NILP (tem))) | |
2873 | break; | |
2874 | ||
2875 | return i < n; | |
2876 | } | |
2877 | ||
2878 | ||
74514898 | 2879 | \f |
fc04fa47 KH |
2880 | /* Fast function to just test if we're at an overlay boundary. */ |
2881 | int | |
145582a0 | 2882 | overlay_touches_p (EMACS_INT pos) |
fc04fa47 | 2883 | { |
2410d73a SM |
2884 | Lisp_Object overlay; |
2885 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2886 | |
2410d73a | 2887 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2888 | { |
145582a0 | 2889 | EMACS_INT endpos; |
fc04fa47 | 2890 | |
2410d73a | 2891 | XSETMISC (overlay ,tail); |
8e50cc2d | 2892 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2893 | abort (); |
2894 | ||
2895 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2896 | if (endpos < pos) | |
2897 | break; | |
2898 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2899 | return 1; | |
2900 | } | |
2901 | ||
2410d73a | 2902 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2903 | { |
145582a0 | 2904 | EMACS_INT startpos; |
fc04fa47 | 2905 | |
2410d73a | 2906 | XSETMISC (overlay, tail); |
8e50cc2d | 2907 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2908 | abort (); |
2909 | ||
2910 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2911 | if (pos < startpos) | |
2912 | break; | |
2913 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2914 | return 1; | |
2915 | } | |
2916 | return 0; | |
2917 | } | |
2eec3b4e | 2918 | \f |
5985d248 KH |
2919 | struct sortvec |
2920 | { | |
2921 | Lisp_Object overlay; | |
145582a0 | 2922 | EMACS_INT beg, end; |
5985d248 KH |
2923 | int priority; |
2924 | }; | |
2925 | ||
2926 | static int | |
d3da34e0 | 2927 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2928 | { |
dfcf069d AS |
2929 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2930 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2931 | if (s1->priority != s2->priority) |
2932 | return s1->priority - s2->priority; | |
2933 | if (s1->beg != s2->beg) | |
2934 | return s1->beg - s2->beg; | |
2935 | if (s1->end != s2->end) | |
2936 | return s2->end - s1->end; | |
2937 | return 0; | |
2938 | } | |
2939 | ||
2940 | /* Sort an array of overlays by priority. The array is modified in place. | |
2941 | The return value is the new size; this may be smaller than the original | |
2942 | size if some of the overlays were invalid or were window-specific. */ | |
2943 | int | |
d3da34e0 | 2944 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
2945 | { |
2946 | int i, j; | |
2947 | struct sortvec *sortvec; | |
2948 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2949 | ||
2950 | /* Put the valid and relevant overlays into sortvec. */ | |
2951 | ||
2952 | for (i = 0, j = 0; i < noverlays; i++) | |
2953 | { | |
0fa767e7 | 2954 | Lisp_Object tem; |
c99fc30f | 2955 | Lisp_Object overlay; |
5985d248 | 2956 | |
c99fc30f | 2957 | overlay = overlay_vec[i]; |
5985d248 KH |
2958 | if (OVERLAY_VALID (overlay) |
2959 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2960 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2961 | { | |
0fa767e7 KH |
2962 | /* If we're interested in a specific window, then ignore |
2963 | overlays that are limited to some other window. */ | |
2964 | if (w) | |
5985d248 | 2965 | { |
0fa767e7 KH |
2966 | Lisp_Object window; |
2967 | ||
2968 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2969 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2970 | continue; |
5985d248 | 2971 | } |
0fa767e7 KH |
2972 | |
2973 | /* This overlay is good and counts: put it into sortvec. */ | |
2974 | sortvec[j].overlay = overlay; | |
2975 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2976 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2977 | tem = Foverlay_get (overlay, Qpriority); | |
2978 | if (INTEGERP (tem)) | |
2979 | sortvec[j].priority = XINT (tem); | |
2980 | else | |
2981 | sortvec[j].priority = 0; | |
2982 | j++; | |
5985d248 KH |
2983 | } |
2984 | } | |
2985 | noverlays = j; | |
2986 | ||
2987 | /* Sort the overlays into the proper order: increasing priority. */ | |
2988 | ||
2989 | if (noverlays > 1) | |
2990 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2991 | ||
2992 | for (i = 0; i < noverlays; i++) | |
2993 | overlay_vec[i] = sortvec[i].overlay; | |
2994 | return (noverlays); | |
2995 | } | |
2996 | \f | |
bbbe9545 KH |
2997 | struct sortstr |
2998 | { | |
cb26008f | 2999 | Lisp_Object string, string2; |
bbbe9545 KH |
3000 | int size; |
3001 | int priority; | |
3002 | }; | |
3003 | ||
e8185fa8 KH |
3004 | struct sortstrlist |
3005 | { | |
3006 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3007 | int size; /* Allocated length of that array. */ | |
3008 | int used; /* How much of the array is currently in use. */ | |
145582a0 | 3009 | EMACS_INT bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
3010 | }; |
3011 | ||
3012 | /* Buffers for storing information about the overlays touching a given | |
3013 | position. These could be automatic variables in overlay_strings, but | |
3014 | it's more efficient to hold onto the memory instead of repeatedly | |
3015 | allocating and freeing it. */ | |
3016 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3017 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3018 | |
3019 | /* Allocated length of overlay_str_buf. */ | |
145582a0 | 3020 | static EMACS_INT overlay_str_len; |
e8185fa8 | 3021 | |
bbbe9545 KH |
3022 | /* A comparison function suitable for passing to qsort. */ |
3023 | static int | |
d3da34e0 | 3024 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3025 | { |
3026 | struct sortstr *s1 = (struct sortstr *)as1; | |
3027 | struct sortstr *s2 = (struct sortstr *)as2; | |
3028 | if (s1->size != s2->size) | |
3029 | return s2->size - s1->size; | |
3030 | if (s1->priority != s2->priority) | |
3031 | return s1->priority - s2->priority; | |
3032 | return 0; | |
3033 | } | |
3034 | ||
e8185fa8 | 3035 | static void |
d3da34e0 | 3036 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, Lisp_Object str2, Lisp_Object pri, int size) |
e8185fa8 | 3037 | { |
145582a0 | 3038 | EMACS_INT nbytes; |
43d27a72 | 3039 | |
e8185fa8 KH |
3040 | if (ssl->used == ssl->size) |
3041 | { | |
3042 | if (ssl->buf) | |
3043 | ssl->size *= 2; | |
3044 | else | |
3045 | ssl->size = 5; | |
3046 | ssl->buf = ((struct sortstr *) | |
3047 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3048 | } | |
3049 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3050 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3051 | ssl->buf[ssl->used].size = size; |
3052 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3053 | ssl->used++; | |
43d27a72 | 3054 | |
4b4deea2 | 3055 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3056 | nbytes = SCHARS (str); |
43d27a72 | 3057 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3058 | nbytes = count_size_as_multibyte (SDATA (str), |
3059 | SBYTES (str)); | |
43d27a72 | 3060 | else |
d5db4077 | 3061 | nbytes = SBYTES (str); |
43d27a72 RS |
3062 | |
3063 | ssl->bytes += nbytes; | |
3064 | ||
cb26008f | 3065 | if (STRINGP (str2)) |
43d27a72 | 3066 | { |
4b4deea2 | 3067 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 3068 | nbytes = SCHARS (str2); |
43d27a72 | 3069 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3070 | nbytes = count_size_as_multibyte (SDATA (str2), |
3071 | SBYTES (str2)); | |
43d27a72 | 3072 | else |
d5db4077 | 3073 | nbytes = SBYTES (str2); |
43d27a72 RS |
3074 | |
3075 | ssl->bytes += nbytes; | |
3076 | } | |
e8185fa8 | 3077 | } |
bbbe9545 KH |
3078 | |
3079 | /* Return the concatenation of the strings associated with overlays that | |
3080 | begin or end at POS, ignoring overlays that are specific to a window | |
3081 | other than W. The strings are concatenated in the appropriate order: | |
3082 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3083 | lower. Normally all of the after-strings come first, but zero-sized |
3084 | overlays have their after-strings ride along with the before-strings | |
3085 | because it would look strange to print them inside-out. | |
3086 | ||
3087 | Returns the string length, and stores the contents indirectly through | |
3088 | PSTR, if that variable is non-null. The string may be overwritten by | |
3089 | subsequent calls. */ | |
6b5d3b89 | 3090 | |
5816888b | 3091 | EMACS_INT |
d3da34e0 | 3092 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3093 | { |
2410d73a SM |
3094 | Lisp_Object overlay, window, str; |
3095 | struct Lisp_Overlay *ov; | |
145582a0 | 3096 | EMACS_INT startpos, endpos; |
4b4deea2 | 3097 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3098 | |
e8185fa8 KH |
3099 | overlay_heads.used = overlay_heads.bytes = 0; |
3100 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3101 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3102 | { |
2410d73a | 3103 | XSETMISC (overlay, ov); |
c2d5b10f | 3104 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3105 | |
3106 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3107 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3108 | if (endpos < pos) | |
3109 | break; | |
3110 | if (endpos != pos && startpos != pos) | |
3111 | continue; | |
3112 | window = Foverlay_get (overlay, Qwindow); | |
3113 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3114 | continue; | |
e8185fa8 KH |
3115 | if (startpos == pos |
3116 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3117 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3118 | (startpos == endpos |
3119 | ? Foverlay_get (overlay, Qafter_string) | |
3120 | : Qnil), | |
3121 | Foverlay_get (overlay, Qpriority), | |
3122 | endpos - startpos); | |
3123 | else if (endpos == pos | |
3124 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3125 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3126 | Foverlay_get (overlay, Qpriority), |
3127 | endpos - startpos); | |
bbbe9545 | 3128 | } |
2410d73a | 3129 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3130 | { |
2410d73a SM |
3131 | XSETMISC (overlay, ov); |
3132 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3133 | |
3134 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3135 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3136 | if (startpos > pos) | |
3137 | break; | |
e8185fa8 KH |
3138 | if (endpos != pos && startpos != pos) |
3139 | continue; | |
3140 | window = Foverlay_get (overlay, Qwindow); | |
3141 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3142 | continue; | |
e8185fa8 KH |
3143 | if (startpos == pos |
3144 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3145 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3146 | (startpos == endpos |
3147 | ? Foverlay_get (overlay, Qafter_string) | |
3148 | : Qnil), | |
3149 | Foverlay_get (overlay, Qpriority), | |
3150 | endpos - startpos); | |
3151 | else if (endpos == pos | |
3152 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3153 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3154 | Foverlay_get (overlay, Qpriority), |
3155 | endpos - startpos); | |
bbbe9545 | 3156 | } |
e8185fa8 KH |
3157 | if (overlay_tails.used > 1) |
3158 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3159 | cmp_for_strings); | |
3160 | if (overlay_heads.used > 1) | |
3161 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3162 | cmp_for_strings); | |
3163 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3164 | { |
e8185fa8 | 3165 | Lisp_Object tem; |
145582a0 | 3166 | EMACS_INT i; |
9f4d7cde | 3167 | unsigned char *p; |
145582a0 | 3168 | EMACS_INT total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3169 | |
3170 | if (total > overlay_str_len) | |
9f4d7cde RS |
3171 | { |
3172 | overlay_str_len = total; | |
3173 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3174 | total); | |
3175 | } | |
bbbe9545 | 3176 | p = overlay_str_buf; |
e8185fa8 | 3177 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3178 | { |
145582a0 | 3179 | EMACS_INT nbytes; |
e8185fa8 | 3180 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3181 | nbytes = copy_text (SDATA (tem), p, |
3182 | SBYTES (tem), | |
43d27a72 RS |
3183 | STRING_MULTIBYTE (tem), multibyte); |
3184 | p += nbytes; | |
bbbe9545 | 3185 | } |
e8185fa8 | 3186 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3187 | { |
145582a0 | 3188 | EMACS_INT nbytes; |
e8185fa8 | 3189 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3190 | nbytes = copy_text (SDATA (tem), p, |
3191 | SBYTES (tem), | |
43d27a72 RS |
3192 | STRING_MULTIBYTE (tem), multibyte); |
3193 | p += nbytes; | |
cb26008f KH |
3194 | tem = overlay_heads.buf[i].string2; |
3195 | if (STRINGP (tem)) | |
3196 | { | |
d5db4077 KR |
3197 | nbytes = copy_text (SDATA (tem), p, |
3198 | SBYTES (tem), | |
43d27a72 RS |
3199 | STRING_MULTIBYTE (tem), multibyte); |
3200 | p += nbytes; | |
cb26008f | 3201 | } |
bbbe9545 | 3202 | } |
cb26008f KH |
3203 | if (p != overlay_str_buf + total) |
3204 | abort (); | |
bbbe9545 KH |
3205 | if (pstr) |
3206 | *pstr = overlay_str_buf; | |
e8185fa8 | 3207 | return total; |
bbbe9545 | 3208 | } |
e8185fa8 | 3209 | return 0; |
bbbe9545 KH |
3210 | } |
3211 | \f | |
5c4f68f1 | 3212 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3213 | |
2eec3b4e | 3214 | void |
d3da34e0 | 3215 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3216 | { |
2410d73a SM |
3217 | Lisp_Object overlay, beg, end; |
3218 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3219 | |
3220 | /* See if anything in overlays_before should move to overlays_after. */ | |
3221 | ||
3222 | /* We don't strictly need prev in this loop; it should always be nil. | |
3223 | But we use it for symmetry and in case that should cease to be true | |
3224 | with some future change. */ | |
2410d73a SM |
3225 | prev = NULL; |
3226 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3227 | { |
2410d73a SM |
3228 | next = tail->next; |
3229 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3230 | |
3231 | /* If the overlay is not valid, get rid of it. */ | |
3232 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3233 | #if 1 |
3234 | abort (); | |
3235 | #else | |
2eec3b4e RS |
3236 | { |
3237 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3238 | if (!NILP (prev)) | |
7539e11f | 3239 | XCDR (prev) = next; |
2eec3b4e | 3240 | else |
5c4f68f1 | 3241 | buf->overlays_before = next; |
2eec3b4e RS |
3242 | tail = prev; |
3243 | continue; | |
3244 | } | |
52f8ec73 | 3245 | #endif |
1ab256cb | 3246 | |
2eec3b4e RS |
3247 | beg = OVERLAY_START (overlay); |
3248 | end = OVERLAY_END (overlay); | |
1ab256cb | 3249 | |
2eec3b4e | 3250 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3251 | { |
2eec3b4e | 3252 | /* OVERLAY needs to be moved. */ |
145582a0 | 3253 | EMACS_INT where = OVERLAY_POSITION (beg); |
2410d73a | 3254 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3255 | |
3256 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3257 | if (prev) |
3258 | prev->next = next; | |
2eec3b4e | 3259 | else |
5c4f68f1 | 3260 | buf->overlays_before = next; |
2eec3b4e RS |
3261 | |
3262 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3263 | other_prev = NULL; |
3264 | for (other = buf->overlays_after; other; | |
3265 | other_prev = other, other = other->next) | |
1ab256cb | 3266 | { |
6af718a4 | 3267 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3268 | |
2410d73a SM |
3269 | XSETMISC (otheroverlay, other); |
3270 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3271 | |
3272 | otherbeg = OVERLAY_START (otheroverlay); | |
3273 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3274 | break; | |
1ab256cb | 3275 | } |
2eec3b4e RS |
3276 | |
3277 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3278 | tail->next = other; |
3279 | if (other_prev) | |
3280 | other_prev->next = tail; | |
1ab256cb | 3281 | else |
5c4f68f1 | 3282 | buf->overlays_after = tail; |
2eec3b4e | 3283 | tail = prev; |
1ab256cb | 3284 | } |
2eec3b4e RS |
3285 | else |
3286 | /* We've reached the things that should stay in overlays_before. | |
3287 | All the rest of overlays_before must end even earlier, | |
3288 | so stop now. */ | |
3289 | break; | |
3290 | } | |
3291 | ||
3292 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3293 | prev = NULL; |
3294 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3295 | { |
2410d73a SM |
3296 | next = tail->next; |
3297 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3298 | |
3299 | /* If the overlay is not valid, get rid of it. */ | |
3300 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3301 | #if 1 |
3302 | abort (); | |
3303 | #else | |
2eec3b4e RS |
3304 | { |
3305 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3306 | if (!NILP (prev)) | |
7539e11f | 3307 | XCDR (prev) = next; |
2eec3b4e | 3308 | else |
5c4f68f1 | 3309 | buf->overlays_after = next; |
2eec3b4e RS |
3310 | tail = prev; |
3311 | continue; | |
3312 | } | |
52f8ec73 | 3313 | #endif |
2eec3b4e RS |
3314 | |
3315 | beg = OVERLAY_START (overlay); | |
3316 | end = OVERLAY_END (overlay); | |
3317 | ||
3318 | /* Stop looking, when we know that nothing further | |
3319 | can possibly end before POS. */ | |
3320 | if (OVERLAY_POSITION (beg) > pos) | |
3321 | break; | |
3322 | ||
3323 | if (OVERLAY_POSITION (end) <= pos) | |
3324 | { | |
3325 | /* OVERLAY needs to be moved. */ | |
145582a0 | 3326 | EMACS_INT where = OVERLAY_POSITION (end); |
2410d73a | 3327 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3328 | |
3329 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3330 | if (prev) |
3331 | prev->next = next; | |
2eec3b4e | 3332 | else |
5c4f68f1 | 3333 | buf->overlays_after = next; |
2eec3b4e RS |
3334 | |
3335 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3336 | other_prev = NULL; |
3337 | for (other = buf->overlays_before; other; | |
3338 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3339 | { |
3340 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3341 | |
2410d73a SM |
3342 | XSETMISC (otheroverlay, other); |
3343 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3344 | |
3345 | otherend = OVERLAY_END (otheroverlay); | |
3346 | if (OVERLAY_POSITION (otherend) <= where) | |
3347 | break; | |
3348 | } | |
3349 | ||
3350 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3351 | tail->next = other; |
3352 | if (other_prev) | |
3353 | other_prev->next = tail; | |
2eec3b4e | 3354 | else |
5c4f68f1 | 3355 | buf->overlays_before = tail; |
2eec3b4e RS |
3356 | tail = prev; |
3357 | } | |
3358 | } | |
3359 | ||
c2d5b10f | 3360 | buf->overlay_center = pos; |
2eec3b4e | 3361 | } |
2b1bdf65 | 3362 | |
423cdb46 | 3363 | void |
d3da34e0 | 3364 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3365 | { |
3366 | /* After an insertion, the lists are still sorted properly, | |
3367 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3368 | if (current_buffer->overlay_center >= pos) |
3369 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3370 | } |
3371 | ||
3372 | void | |
d3da34e0 | 3373 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3374 | { |
c2d5b10f | 3375 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3376 | /* The deletion was to our right. No change needed; the before- and |
3377 | after-lists are still consistent. */ | |
3378 | ; | |
c2d5b10f | 3379 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3380 | /* The deletion was to our left. We need to adjust the center value |
3381 | to account for the change in position, but the lists are consistent | |
3382 | given the new value. */ | |
c2d5b10f | 3383 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3384 | else |
3385 | /* We're right in the middle. There might be things on the after-list | |
3386 | that now belong on the before-list. Recentering will move them, | |
3387 | and also update the center point. */ | |
3388 | recenter_overlay_lists (current_buffer, pos); | |
3389 | } | |
3390 | ||
2b1bdf65 KH |
3391 | /* Fix up overlays that were garbled as a result of permuting markers |
3392 | in the range START through END. Any overlay with at least one | |
3393 | endpoint in this range will need to be unlinked from the overlay | |
3394 | list and reinserted in its proper place. | |
3395 | Such an overlay might even have negative size at this point. | |
6b61353c | 3396 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3397 | void |
145582a0 | 3398 | fix_start_end_in_overlays (register EMACS_INT start, register EMACS_INT end) |
2b1bdf65 | 3399 | { |
6af718a4 | 3400 | Lisp_Object overlay; |
5df8f01b PE |
3401 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3402 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3403 | /* These are either nil, indicating that before_list or after_list |
3404 | should be assigned, or the cons cell the cdr of which should be | |
3405 | assigned. */ | |
2410d73a | 3406 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3407 | /* 'Parent', likewise, indicates a cons cell or |
3408 | current_buffer->overlays_before or overlays_after, depending | |
3409 | which loop we're in. */ | |
2410d73a | 3410 | struct Lisp_Overlay *tail, *parent; |
145582a0 | 3411 | EMACS_INT startpos, endpos; |
2b1bdf65 KH |
3412 | |
3413 | /* This algorithm shifts links around instead of consing and GCing. | |
3414 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3415 | well-formed list except that its last element, the CDR of beforep |
3416 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3417 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3418 | that before_list isn't initialized, although it may look | |
3419 | strange. */ | |
2410d73a | 3420 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3421 | { |
2410d73a | 3422 | XSETMISC (overlay, tail); |
6b61353c | 3423 | |
2b1bdf65 | 3424 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3425 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3426 | ||
3427 | /* If the overlay is backwards, make it empty. */ | |
3428 | if (endpos < startpos) | |
3429 | { | |
3430 | startpos = endpos; | |
3431 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3432 | Qnil); | |
3433 | } | |
3434 | ||
2b1bdf65 KH |
3435 | if (endpos < start) |
3436 | break; | |
60ebfdf3 | 3437 | |
2b1bdf65 KH |
3438 | if (endpos < end |
3439 | || (startpos >= start && startpos < end)) | |
3440 | { | |
2b1bdf65 KH |
3441 | /* Add it to the end of the wrong list. Later on, |
3442 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3443 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3444 | { |
2410d73a | 3445 | if (!afterp) |
1138e742 KR |
3446 | after_list = tail; |
3447 | else | |
2410d73a | 3448 | afterp->next = tail; |
1138e742 | 3449 | afterp = tail; |
2b1bdf65 KH |
3450 | } |
3451 | else | |
3452 | { | |
2410d73a | 3453 | if (!beforep) |
1138e742 KR |
3454 | before_list = tail; |
3455 | else | |
2410d73a | 3456 | beforep->next = tail; |
1138e742 | 3457 | beforep = tail; |
2b1bdf65 | 3458 | } |
2410d73a SM |
3459 | if (!parent) |
3460 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3461 | else |
2410d73a SM |
3462 | parent->next = tail->next; |
3463 | tail = tail->next; | |
2b1bdf65 KH |
3464 | } |
3465 | else | |
2410d73a | 3466 | parent = tail, tail = parent->next; |
2b1bdf65 | 3467 | } |
2410d73a | 3468 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3469 | { |
2410d73a | 3470 | XSETMISC (overlay, tail); |
6b61353c | 3471 | |
2b1bdf65 | 3472 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3473 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3474 | ||
3475 | /* If the overlay is backwards, make it empty. */ | |
3476 | if (endpos < startpos) | |
3477 | { | |
3478 | startpos = endpos; | |
3479 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3480 | Qnil); |
6b61353c KH |
3481 | } |
3482 | ||
2b1bdf65 KH |
3483 | if (startpos >= end) |
3484 | break; | |
6b61353c | 3485 | |
2b1bdf65 KH |
3486 | if (startpos >= start |
3487 | || (endpos >= start && endpos < end)) | |
3488 | { | |
c2d5b10f | 3489 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3490 | { |
2410d73a | 3491 | if (!afterp) |
1138e742 KR |
3492 | after_list = tail; |
3493 | else | |
2410d73a | 3494 | afterp->next = tail; |
1138e742 | 3495 | afterp = tail; |
2b1bdf65 KH |
3496 | } |
3497 | else | |
3498 | { | |
2410d73a | 3499 | if (!beforep) |
1138e742 KR |
3500 | before_list = tail; |
3501 | else | |
2410d73a | 3502 | beforep->next = tail; |
1138e742 | 3503 | beforep = tail; |
2b1bdf65 | 3504 | } |
2410d73a SM |
3505 | if (!parent) |
3506 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3507 | else |
2410d73a SM |
3508 | parent->next = tail->next; |
3509 | tail = tail->next; | |
2b1bdf65 KH |
3510 | } |
3511 | else | |
2410d73a | 3512 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3513 | } |
3514 | ||
3515 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3516 | and let the recenter function make it sane again. */ | |
2410d73a | 3517 | if (beforep) |
1138e742 | 3518 | { |
2410d73a | 3519 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3520 | current_buffer->overlays_before = before_list; |
3521 | } | |
c2d5b10f | 3522 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3523 | |
2410d73a | 3524 | if (afterp) |
1138e742 | 3525 | { |
2410d73a | 3526 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3527 | current_buffer->overlays_after = after_list; |
3528 | } | |
c2d5b10f | 3529 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3530 | } |
3b06f880 KH |
3531 | |
3532 | /* We have two types of overlay: the one whose ending marker is | |
3533 | after-insertion-marker (this is the usual case) and the one whose | |
3534 | ending marker is before-insertion-marker. When `overlays_before' | |
3535 | contains overlays of the latter type and the former type in this | |
3536 | order and both overlays end at inserting position, inserting a text | |
3537 | increases only the ending marker of the latter type, which results | |
3538 | in incorrect ordering of `overlays_before'. | |
3539 | ||
3540 | This function fixes ordering of overlays in the slot | |
3541 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3542 | was at PREV, and now is at POS. */ | |
3543 | ||
01136e9b | 3544 | void |
d3da34e0 | 3545 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3546 | { |
2410d73a SM |
3547 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3548 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3549 | Lisp_Object tem; | |
5df8f01b | 3550 | EMACS_INT end IF_LINT (= 0); |
3b06f880 KH |
3551 | |
3552 | /* After the insertion, the several overlays may be in incorrect | |
3553 | order. The possibility is that, in the list `overlays_before', | |
3554 | an overlay which ends at POS appears after an overlay which ends | |
3555 | at PREV. Since POS is greater than PREV, we must fix the | |
3556 | ordering of these overlays, by moving overlays ends at POS before | |
3557 | the overlays ends at PREV. */ | |
3558 | ||
3559 | /* At first, find a place where disordered overlays should be linked | |
3560 | in. It is where an overlay which end before POS exists. (i.e. an | |
3561 | overlay whose ending marker is after-insertion-marker if disorder | |
3562 | exists). */ | |
2410d73a SM |
3563 | while (tail |
3564 | && (XSETMISC (tem, tail), | |
3565 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3566 | { |
3567 | parent = tail; | |
2410d73a | 3568 | tail = tail->next; |
1138e742 | 3569 | } |
3b06f880 KH |
3570 | |
3571 | /* If we don't find such an overlay, | |
3572 | or the found one ends before PREV, | |
3573 | or the found one is the last one in the list, | |
3574 | we don't have to fix anything. */ | |
f93ad4cf | 3575 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3576 | return; |
3577 | ||
1138e742 KR |
3578 | right_pair = parent; |
3579 | parent = tail; | |
2410d73a | 3580 | tail = tail->next; |
3b06f880 | 3581 | |
1138e742 | 3582 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3583 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3584 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3585 | we found an overlay which ends before PREV, the remaining | |
3586 | overlays are in correct order. */ | |
2410d73a | 3587 | while (tail) |
3b06f880 | 3588 | { |
2410d73a SM |
3589 | XSETMISC (tem, tail); |
3590 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3591 | |
3592 | if (end == pos) | |
3593 | { /* This overlay is disordered. */ | |
2410d73a | 3594 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3595 | |
3596 | /* Unlink the found overlay. */ | |
2410d73a SM |
3597 | tail = found->next; |
3598 | parent->next = tail; | |
1138e742 KR |
3599 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3600 | and link it into the right place. */ | |
2410d73a | 3601 | if (!right_pair) |
1138e742 | 3602 | { |
2410d73a | 3603 | found->next = bp->overlays_before; |
1138e742 KR |
3604 | bp->overlays_before = found; |
3605 | } | |
3606 | else | |
3607 | { | |
2410d73a SM |
3608 | found->next = right_pair->next; |
3609 | right_pair->next = found; | |
1138e742 | 3610 | } |
3b06f880 KH |
3611 | } |
3612 | else if (end == prev) | |
1138e742 KR |
3613 | { |
3614 | parent = tail; | |
2410d73a | 3615 | tail = tail->next; |
1138e742 | 3616 | } |
3b06f880 KH |
3617 | else /* No more disordered overlay. */ |
3618 | break; | |
3619 | } | |
3620 | } | |
2eec3b4e | 3621 | \f |
52f8ec73 | 3622 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3623 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3624 | (Lisp_Object object) |
52f8ec73 JB |
3625 | { |
3626 | return (OVERLAYP (object) ? Qt : Qnil); | |
3627 | } | |
3628 | ||
acac2700 | 3629 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3630 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3631 | If omitted, BUFFER defaults to the current buffer. |
3632 | BEG and END may be integers or markers. | |
a625ee20 RS |
3633 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3634 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3635 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3636 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3637 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3638 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3639 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3640 | { |
3641 | Lisp_Object overlay; | |
5c4f68f1 | 3642 | struct buffer *b; |
2eec3b4e | 3643 | |
5c4f68f1 | 3644 | if (NILP (buffer)) |
67180c6a | 3645 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3646 | else |
b7826503 | 3647 | CHECK_BUFFER (buffer); |
883047b9 JB |
3648 | if (MARKERP (beg) |
3649 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3650 | error ("Marker points into wrong buffer"); | |
3651 | if (MARKERP (end) | |
3652 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3653 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3654 | |
b7826503 PJ |
3655 | CHECK_NUMBER_COERCE_MARKER (beg); |
3656 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3657 | |
883047b9 | 3658 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3659 | { |
c99fc30f KH |
3660 | Lisp_Object temp; |
3661 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3662 | } |
883047b9 JB |
3663 | |
3664 | b = XBUFFER (buffer); | |
3665 | ||
3666 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3667 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3668 | |
acac2700 RS |
3669 | if (!NILP (front_advance)) |
3670 | XMARKER (beg)->insertion_type = 1; | |
3671 | if (!NILP (rear_advance)) | |
3672 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3673 | |
48e2e3ba | 3674 | overlay = allocate_misc (); |
89ca3e1b | 3675 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3676 | XOVERLAY (overlay)->start = beg; |
3677 | XOVERLAY (overlay)->end = end; | |
3678 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3679 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3680 | |
177c0ea7 | 3681 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3682 | end = OVERLAY_END (overlay); |
c2d5b10f | 3683 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3684 | { |
3685 | if (b->overlays_after) | |
3686 | XOVERLAY (overlay)->next = b->overlays_after; | |
3687 | b->overlays_after = XOVERLAY (overlay); | |
3688 | } | |
2eec3b4e | 3689 | else |
2410d73a SM |
3690 | { |
3691 | if (b->overlays_before) | |
3692 | XOVERLAY (overlay)->next = b->overlays_before; | |
3693 | b->overlays_before = XOVERLAY (overlay); | |
3694 | } | |
2eec3b4e RS |
3695 | |
3696 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3697 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3698 | |
b61982dd JB |
3699 | /* We don't need to redisplay the region covered by the overlay, because |
3700 | the overlay has no properties at the moment. */ | |
3701 | ||
2eec3b4e RS |
3702 | return overlay; |
3703 | } | |
876aa27c RS |
3704 | \f |
3705 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3706 | ||
3707 | static void | |
d3da34e0 | 3708 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3709 | { |
876aa27c RS |
3710 | if (start > end) |
3711 | { | |
145582a0 | 3712 | EMACS_INT temp = start; |
26f545d7 GM |
3713 | start = end; |
3714 | end = temp; | |
876aa27c RS |
3715 | } |
3716 | ||
481b5054 | 3717 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3718 | |
876aa27c RS |
3719 | /* If this is a buffer not in the selected window, |
3720 | we must do other windows. */ | |
3721 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3722 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3723 | /* If multiple windows show this buffer, we must do other windows. */ |
3724 | else if (buffer_shared > 1) | |
3725 | windows_or_buffers_changed = 1; | |
18700091 KS |
3726 | /* If we modify an overlay at the end of the buffer, we cannot |
3727 | be sure that window end is still valid. */ | |
3728 | else if (end >= ZV && start <= ZV) | |
3729 | windows_or_buffers_changed = 1; | |
876aa27c | 3730 | |
d8b9150f | 3731 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3732 | } |
2eec3b4e | 3733 | |
018ba359 | 3734 | \f |
2410d73a | 3735 | static struct Lisp_Overlay * |
d3da34e0 | 3736 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3737 | { |
3738 | struct Lisp_Overlay *tmp, *prev; | |
3739 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3740 | if (tmp == overlay) | |
3741 | { | |
3742 | if (prev) | |
3743 | prev->next = tmp->next; | |
3744 | else | |
3745 | list = tmp->next; | |
3746 | overlay->next = NULL; | |
3747 | break; | |
3748 | } | |
3749 | return list; | |
3750 | } | |
3751 | ||
5c4f68f1 | 3752 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3753 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3754 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3755 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3756 | buffer. */) |
5842a27b | 3757 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3758 | { |
0a4469c9 RS |
3759 | struct buffer *b, *ob; |
3760 | Lisp_Object obuffer; | |
aed13378 | 3761 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3762 | |
b7826503 | 3763 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3764 | if (NILP (buffer)) |
3765 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3766 | if (NILP (buffer)) |
67180c6a | 3767 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3768 | CHECK_BUFFER (buffer); |
883047b9 JB |
3769 | |
3770 | if (MARKERP (beg) | |
3771 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3772 | error ("Marker points into wrong buffer"); | |
3773 | if (MARKERP (end) | |
3774 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3775 | error ("Marker points into wrong buffer"); | |
3776 | ||
b7826503 PJ |
3777 | CHECK_NUMBER_COERCE_MARKER (beg); |
3778 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3779 | |
9d7608b7 KH |
3780 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3781 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3782 | |
b61982dd JB |
3783 | if (XINT (beg) > XINT (end)) |
3784 | { | |
c99fc30f KH |
3785 | Lisp_Object temp; |
3786 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3787 | } |
3788 | ||
9d7608b7 KH |
3789 | specbind (Qinhibit_quit, Qt); |
3790 | ||
0a4469c9 | 3791 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3792 | b = XBUFFER (buffer); |
8801a864 | 3793 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3794 | |
c82ed728 | 3795 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3796 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3797 | { |
3798 | /* Redisplay where the overlay was. */ | |
3799 | if (!NILP (obuffer)) | |
3800 | { | |
145582a0 EZ |
3801 | EMACS_INT o_beg; |
3802 | EMACS_INT o_end; | |
50760c4a | 3803 | |
80509f2f RS |
3804 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3805 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3806 | |
2e34157c | 3807 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3808 | } |
3809 | ||
3810 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3811 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3812 | } |
c82ed728 JB |
3813 | else |
3814 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3815 | { | |
145582a0 | 3816 | EMACS_INT o_beg, o_end; |
c82ed728 | 3817 | |
80509f2f RS |
3818 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3819 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3820 | |
2e34157c RS |
3821 | if (o_beg == XINT (beg)) |
3822 | modify_overlay (b, o_end, XINT (end)); | |
3823 | else if (o_end == XINT (end)) | |
3824 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3825 | else |
3826 | { | |
2e34157c RS |
3827 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3828 | if (XINT (end) > o_end) o_end = XINT (end); | |
3829 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3830 | } |
3831 | } | |
b61982dd | 3832 | |
0a4469c9 RS |
3833 | if (!NILP (obuffer)) |
3834 | { | |
2410d73a SM |
3835 | ob->overlays_before |
3836 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3837 | ob->overlays_after | |
3838 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3839 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3840 | } |
5c4f68f1 JB |
3841 | |
3842 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3843 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3844 | |
177c0ea7 | 3845 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3846 | end = OVERLAY_END (overlay); |
c2d5b10f | 3847 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3848 | { |
8f924df7 KH |
3849 | XOVERLAY (overlay)->next = b->overlays_after; |
3850 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3851 | } |
2eec3b4e | 3852 | else |
2410d73a | 3853 | { |
8f924df7 KH |
3854 | XOVERLAY (overlay)->next = b->overlays_before; |
3855 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3856 | } |
2eec3b4e RS |
3857 | |
3858 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3859 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3860 | |
0a4469c9 | 3861 | return unbind_to (count, overlay); |
2eec3b4e RS |
3862 | } |
3863 | ||
3864 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3865 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3866 | (Lisp_Object overlay) |
2eec3b4e | 3867 | { |
0a4469c9 | 3868 | Lisp_Object buffer; |
5c4f68f1 | 3869 | struct buffer *b; |
aed13378 | 3870 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3871 | |
b7826503 | 3872 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3873 | |
0a4469c9 RS |
3874 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3875 | if (NILP (buffer)) | |
3876 | return Qnil; | |
3877 | ||
3878 | b = XBUFFER (buffer); | |
0a4469c9 | 3879 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3880 | |
2410d73a SM |
3881 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3882 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3883 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3884 | modify_overlay (b, |
8231a9aa RS |
3885 | marker_position (OVERLAY_START (overlay)), |
3886 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3887 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3888 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3889 | ||
e58c389d | 3890 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3891 | display optimizations for the affected buffer, on the basis that |
3892 | these strings may contain newlines. This is easier to do than to | |
3893 | check for that situation during redisplay. */ | |
3894 | if (!windows_or_buffers_changed | |
3895 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3896 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3897 | b->prevent_redisplay_optimizations_p = 1; | |
3898 | ||
0a4469c9 | 3899 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3900 | } |
3901 | \f | |
8ebafa8d JB |
3902 | /* Overlay dissection functions. */ |
3903 | ||
16a97296 | 3904 | DEFUE ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3905 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3906 | (Lisp_Object overlay) |
8ebafa8d | 3907 | { |
b7826503 | 3908 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3909 | |
3910 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3911 | } | |
3912 | ||
16a97296 | 3913 | DEFUE ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3914 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3915 | (Lisp_Object overlay) |
8ebafa8d | 3916 | { |
b7826503 | 3917 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3918 | |
3919 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3920 | } | |
3921 | ||
3922 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3923 | doc: /* Return the buffer OVERLAY belongs to. |
3924 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3925 | (Lisp_Object overlay) |
8ebafa8d | 3926 | { |
b7826503 | 3927 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3928 | |
3929 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3930 | } | |
3931 | ||
3932 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3933 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3934 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3935 | OVERLAY. */) |
5842a27b | 3936 | (Lisp_Object overlay) |
8ebafa8d | 3937 | { |
b7826503 | 3938 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3939 | |
48e2e3ba | 3940 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3941 | } |
3942 | ||
3943 | \f | |
2eec3b4e | 3944 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3945 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3946 | (Lisp_Object pos) |
2eec3b4e RS |
3947 | { |
3948 | int noverlays; | |
2eec3b4e RS |
3949 | Lisp_Object *overlay_vec; |
3950 | int len; | |
3951 | Lisp_Object result; | |
3952 | ||
b7826503 | 3953 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3954 | |
3955 | len = 10; | |
a9800ae8 | 3956 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3957 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3958 | ||
3959 | /* Put all the overlays we want in a vector in overlay_vec. | |
3960 | Store the length in len. */ | |
2a77a7d7 | 3961 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3962 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
3963 | |
3964 | /* Make a list of them all. */ | |
3965 | result = Flist (noverlays, overlay_vec); | |
3966 | ||
9ac0d9e0 | 3967 | xfree (overlay_vec); |
2eec3b4e RS |
3968 | return result; |
3969 | } | |
3970 | ||
74514898 | 3971 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3972 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3973 | Overlap means that at least one character is contained within the overlay |
3974 | and also contained within the specified region. | |
7723e095 MR |
3975 | Empty overlays are included in the result if they are located at BEG, |
3976 | between BEG and END, or at END provided END denotes the position at the | |
3977 | end of the buffer. */) | |
5842a27b | 3978 | (Lisp_Object beg, Lisp_Object end) |
74514898 RS |
3979 | { |
3980 | int noverlays; | |
3981 | Lisp_Object *overlay_vec; | |
3982 | int len; | |
3983 | Lisp_Object result; | |
3984 | ||
b7826503 PJ |
3985 | CHECK_NUMBER_COERCE_MARKER (beg); |
3986 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3987 | |
3988 | len = 10; | |
3989 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3990 | ||
3991 | /* Put all the overlays we want in a vector in overlay_vec. | |
3992 | Store the length in len. */ | |
3993 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3994 | NULL, NULL); |
74514898 RS |
3995 | |
3996 | /* Make a list of them all. */ | |
3997 | result = Flist (noverlays, overlay_vec); | |
3998 | ||
3999 | xfree (overlay_vec); | |
4000 | return result; | |
4001 | } | |
4002 | ||
16a97296 | 4003 | DEFUE ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4004 | 1, 1, 0, |
7ee72033 | 4005 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4006 | If there are no overlay boundaries from POS to (point-max), |
4007 | the value is (point-max). */) | |
5842a27b | 4008 | (Lisp_Object pos) |
2eec3b4e RS |
4009 | { |
4010 | int noverlays; | |
0f8b27ea | 4011 | EMACS_INT endpos; |
2eec3b4e RS |
4012 | Lisp_Object *overlay_vec; |
4013 | int len; | |
2eec3b4e RS |
4014 | int i; |
4015 | ||
b7826503 | 4016 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4017 | |
4018 | len = 10; | |
4019 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4020 | ||
4021 | /* Put all the overlays we want in a vector in overlay_vec. | |
4022 | Store the length in len. | |
4023 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4024 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4025 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4026 | |
4027 | /* If any of these overlays ends before endpos, | |
4028 | use its ending point instead. */ | |
4029 | for (i = 0; i < noverlays; i++) | |
4030 | { | |
4031 | Lisp_Object oend; | |
0f8b27ea | 4032 | EMACS_INT oendpos; |
2eec3b4e RS |
4033 | |
4034 | oend = OVERLAY_END (overlay_vec[i]); | |
4035 | oendpos = OVERLAY_POSITION (oend); | |
4036 | if (oendpos < endpos) | |
4037 | endpos = oendpos; | |
1ab256cb RM |
4038 | } |
4039 | ||
9ac0d9e0 | 4040 | xfree (overlay_vec); |
2eec3b4e RS |
4041 | return make_number (endpos); |
4042 | } | |
239c932b | 4043 | |
16a97296 | 4044 | DEFUE ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 4045 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 4046 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4047 | If there are no overlay boundaries from (point-min) to POS, |
4048 | the value is (point-min). */) | |
5842a27b | 4049 | (Lisp_Object pos) |
239c932b | 4050 | { |
0f8b27ea | 4051 | EMACS_INT prevpos; |
239c932b RS |
4052 | Lisp_Object *overlay_vec; |
4053 | int len; | |
239c932b | 4054 | |
b7826503 | 4055 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4056 | |
624bbdc4 RS |
4057 | /* At beginning of buffer, we know the answer; |
4058 | avoid bug subtracting 1 below. */ | |
4059 | if (XINT (pos) == BEGV) | |
4060 | return pos; | |
4061 | ||
017f0539 GM |
4062 | len = 10; |
4063 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4064 | ||
239c932b RS |
4065 | /* Put all the overlays we want in a vector in overlay_vec. |
4066 | Store the length in len. | |
daa1c109 | 4067 | prevpos gets the position of the previous change. */ |
328ab8e7 PE |
4068 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
4069 | (EMACS_INT *) 0, &prevpos, 1); | |
239c932b | 4070 | |
239c932b RS |
4071 | xfree (overlay_vec); |
4072 | return make_number (prevpos); | |
4073 | } | |
2eec3b4e RS |
4074 | \f |
4075 | /* These functions are for debugging overlays. */ | |
4076 | ||
4077 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4078 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4079 | The car has all the overlays before the overlay center; |
4080 | the cdr has all the overlays after the overlay center. | |
4081 | Recentering overlays moves overlays between these lists. | |
4082 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4083 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4084 | (void) |
2eec3b4e | 4085 | { |
2410d73a SM |
4086 | struct Lisp_Overlay *ol; |
4087 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4088 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4089 | { | |
4090 | XSETMISC (tmp, ol); | |
4091 | before = Fcons (tmp, before); | |
4092 | } | |
4093 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4094 | { | |
4095 | XSETMISC (tmp, ol); | |
4096 | after = Fcons (tmp, after); | |
4097 | } | |
4098 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4099 | } |
4100 | ||
4101 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4102 | doc: /* Recenter the overlays of the current buffer around position POS. |
4103 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4104 | for positions far away from POS). */) | |
5842a27b | 4105 | (Lisp_Object pos) |
2eec3b4e | 4106 | { |
b7826503 | 4107 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4108 | |
5c4f68f1 | 4109 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4110 | return Qnil; |
4111 | } | |
4112 | \f | |
16a97296 | 4113 | DEFUE ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4114 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4115 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4116 | { |
b7826503 | 4117 | CHECK_OVERLAY (overlay); |
9a593927 | 4118 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4119 | } |
4120 | ||
4121 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 | 4122 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
5842a27b | 4123 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4124 | { |
48e2e3ba | 4125 | Lisp_Object tail, buffer; |
9d7608b7 | 4126 | int changed; |
2eec3b4e | 4127 | |
b7826503 | 4128 | CHECK_OVERLAY (overlay); |
b61982dd | 4129 | |
274a9425 RS |
4130 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4131 | ||
48e2e3ba | 4132 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4133 | CONSP (tail) && CONSP (XCDR (tail)); |
4134 | tail = XCDR (XCDR (tail))) | |
4135 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4136 | { |
7539e11f | 4137 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4138 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4139 | goto found; |
274a9425 | 4140 | } |
9d7608b7 KH |
4141 | /* It wasn't in the list, so add it to the front. */ |
4142 | changed = !NILP (value); | |
48e2e3ba KH |
4143 | XOVERLAY (overlay)->plist |
4144 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4145 | found: |
4146 | if (! NILP (buffer)) | |
4147 | { | |
4148 | if (changed) | |
876aa27c | 4149 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4150 | marker_position (OVERLAY_START (overlay)), |
4151 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4152 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4153 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4154 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4155 | Fdelete_overlay (overlay); | |
4156 | } | |
7d63db98 | 4157 | |
2eec3b4e | 4158 | return value; |
1ab256cb RM |
4159 | } |
4160 | \f | |
9115729e KH |
4161 | /* Subroutine of report_overlay_modification. */ |
4162 | ||
4163 | /* Lisp vector holding overlay hook functions to call. | |
4164 | Vector elements come in pairs. | |
4165 | Each even-index element is a list of hook functions. | |
4166 | The following odd-index element is the overlay they came from. | |
4167 | ||
4168 | Before the buffer change, we fill in this vector | |
4169 | as we call overlay hook functions. | |
4170 | After the buffer change, we get the functions to call from this vector. | |
4171 | This way we always call the same functions before and after the change. */ | |
4172 | static Lisp_Object last_overlay_modification_hooks; | |
4173 | ||
4174 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4175 | static int last_overlay_modification_hooks_used; | |
4176 | ||
4177 | /* Add one functionlist/overlay pair | |
4178 | to the end of last_overlay_modification_hooks. */ | |
4179 | ||
4180 | static void | |
d3da34e0 | 4181 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e KH |
4182 | { |
4183 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4184 | ||
4185 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4186 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4187 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4188 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4189 | functionlist); last_overlay_modification_hooks_used++; | |
4190 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4191 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4192 | } |
4193 | \f | |
173f2a64 RS |
4194 | /* Run the modification-hooks of overlays that include |
4195 | any part of the text in START to END. | |
9115729e KH |
4196 | If this change is an insertion, also |
4197 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4198 | and the insert-after-hooks of overlay ending at START. |
4199 | ||
4200 | This is called both before and after the modification. | |
4201 | AFTER is nonzero when we call after the modification. | |
4202 | ||
9115729e KH |
4203 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4204 | When AFTER is nonzero, they are the start position, | |
4205 | the position after the inserted new text, | |
4206 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4207 | |
4208 | void | |
d3da34e0 JB |
4209 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4210 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4211 | { |
2410d73a SM |
4212 | Lisp_Object prop, overlay; |
4213 | struct Lisp_Overlay *tail; | |
9115729e KH |
4214 | /* 1 if this change is an insertion. */ |
4215 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4216 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4217 | |
4218 | overlay = Qnil; | |
2410d73a | 4219 | tail = NULL; |
9115729e | 4220 | |
27c6b98e SM |
4221 | /* We used to run the functions as soon as we found them and only register |
4222 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4223 | case. But running elisp code as we traverse the list of overlays is | |
4224 | painful because the list can be modified by the elisp code so we had to | |
4225 | copy at several places. We now simply do a read-only traversal that | |
4226 | only collects the functions to run and we run them afterwards. It's | |
4227 | simpler, especially since all the code was already there. -stef */ | |
4228 | ||
a615c6dc | 4229 | if (!after) |
173f2a64 | 4230 | { |
a615c6dc SM |
4231 | /* We are being called before a change. |
4232 | Scan the overlays to find the functions to call. */ | |
4233 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4234 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4235 | { |
145582a0 | 4236 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4237 | Lisp_Object ostart, oend; |
4238 | ||
2410d73a | 4239 | XSETMISC (overlay, tail); |
a615c6dc SM |
4240 | |
4241 | ostart = OVERLAY_START (overlay); | |
4242 | oend = OVERLAY_END (overlay); | |
4243 | endpos = OVERLAY_POSITION (oend); | |
4244 | if (XFASTINT (start) > endpos) | |
4245 | break; | |
4246 | startpos = OVERLAY_POSITION (ostart); | |
4247 | if (insertion && (XFASTINT (start) == startpos | |
4248 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4249 | { |
a615c6dc SM |
4250 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4251 | if (!NILP (prop)) | |
4252 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4253 | } |
a615c6dc SM |
4254 | if (insertion && (XFASTINT (start) == endpos |
4255 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4256 | { |
a615c6dc SM |
4257 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4258 | if (!NILP (prop)) | |
4259 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4260 | } |
a615c6dc SM |
4261 | /* Test for intersecting intervals. This does the right thing |
4262 | for both insertion and deletion. */ | |
4263 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4264 | { |
a615c6dc SM |
4265 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4266 | if (!NILP (prop)) | |
4267 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4268 | } |
173f2a64 | 4269 | } |
60ebfdf3 | 4270 | |
2410d73a | 4271 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4272 | { |
145582a0 | 4273 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4274 | Lisp_Object ostart, oend; |
4275 | ||
2410d73a | 4276 | XSETMISC (overlay, tail); |
a615c6dc SM |
4277 | |
4278 | ostart = OVERLAY_START (overlay); | |
4279 | oend = OVERLAY_END (overlay); | |
4280 | startpos = OVERLAY_POSITION (ostart); | |
4281 | endpos = OVERLAY_POSITION (oend); | |
4282 | if (XFASTINT (end) < startpos) | |
4283 | break; | |
4284 | if (insertion && (XFASTINT (start) == startpos | |
4285 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4286 | { |
a615c6dc SM |
4287 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4288 | if (!NILP (prop)) | |
4289 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4290 | } |
a615c6dc SM |
4291 | if (insertion && (XFASTINT (start) == endpos |
4292 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4293 | { |
a615c6dc SM |
4294 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4295 | if (!NILP (prop)) | |
4296 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4297 | } |
a615c6dc SM |
4298 | /* Test for intersecting intervals. This does the right thing |
4299 | for both insertion and deletion. */ | |
4300 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4301 | { |
a615c6dc SM |
4302 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4303 | if (!NILP (prop)) | |
4304 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4305 | } |
173f2a64 RS |
4306 | } |
4307 | } | |
55b48893 | 4308 | |
a615c6dc SM |
4309 | GCPRO4 (overlay, arg1, arg2, arg3); |
4310 | { | |
4311 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4312 | First copy the vector contents, in case some of these hooks | |
4313 | do subsequent modification of the buffer. */ | |
4314 | int size = last_overlay_modification_hooks_used; | |
4315 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4316 | int i; | |
4317 | ||
72af86bd AS |
4318 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4319 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4320 | gcpro1.var = copy; |
4321 | gcpro1.nvars = size; | |
4322 | ||
4323 | for (i = 0; i < size;) | |
4324 | { | |
8f54f30a PE |
4325 | Lisp_Object prop_i, overlay_i; |
4326 | prop_i = copy[i++]; | |
4327 | overlay_i = copy[i++]; | |
4328 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4329 | } |
4330 | } | |
55b48893 | 4331 | UNGCPRO; |
173f2a64 RS |
4332 | } |
4333 | ||
4334 | static void | |
d3da34e0 JB |
4335 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4336 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4337 | { |
930a9140 | 4338 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4339 | |
930a9140 | 4340 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4341 | |
6d70a280 | 4342 | while (CONSP (list)) |
173f2a64 | 4343 | { |
930a9140 | 4344 | if (NILP (arg3)) |
6d70a280 | 4345 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4346 | else |
6d70a280 SM |
4347 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4348 | list = XCDR (list); | |
173f2a64 RS |
4349 | } |
4350 | UNGCPRO; | |
4351 | } | |
9d7608b7 KH |
4352 | |
4353 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4354 | property is set. */ | |
4355 | void | |
d3da34e0 | 4356 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4357 | { |
2410d73a SM |
4358 | Lisp_Object overlay, hit_list; |
4359 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4360 | |
4361 | hit_list = Qnil; | |
c2d5b10f | 4362 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4363 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4364 | { |
145582a0 | 4365 | EMACS_INT endpos; |
2410d73a | 4366 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4367 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4368 | if (endpos < pos) | |
4369 | break; | |
4370 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4371 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4372 | hit_list = Fcons (overlay, hit_list); |
4373 | } | |
4374 | else | |
2410d73a | 4375 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4376 | { |
145582a0 | 4377 | EMACS_INT startpos; |
2410d73a | 4378 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4379 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4380 | if (startpos > pos) | |
4381 | break; | |
4382 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4383 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4384 | hit_list = Fcons (overlay, hit_list); |
4385 | } | |
7539e11f KR |
4386 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4387 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4388 | } |
173f2a64 | 4389 | \f |
54dfdeb0 | 4390 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4391 | in the slot with offset OFFSET. */ |
4392 | ||
0fa3ba92 | 4393 | void |
d3da34e0 | 4394 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4395 | { |
ad97b375 | 4396 | Lisp_Object predicate; |
177c0ea7 | 4397 | |
64e16c3c | 4398 | switch (type) |
0fa3ba92 | 4399 | { |
2de9f71c | 4400 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4401 | case Lisp_String: predicate = Qstringp; break; |
4402 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4403 | default: abort (); | |
0fa3ba92 JB |
4404 | } |
4405 | ||
ad97b375 | 4406 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4407 | } |
7c02e886 | 4408 | |
0fa3ba92 | 4409 | \f |
b86af064 GM |
4410 | /*********************************************************************** |
4411 | Allocation with mmap | |
4412 | ***********************************************************************/ | |
4413 | ||
4414 | #ifdef USE_MMAP_FOR_BUFFERS | |
4415 | ||
4416 | #include <sys/types.h> | |
4417 | #include <sys/mman.h> | |
4418 | ||
4419 | #ifndef MAP_ANON | |
4420 | #ifdef MAP_ANONYMOUS | |
4421 | #define MAP_ANON MAP_ANONYMOUS | |
4422 | #else | |
4423 | #define MAP_ANON 0 | |
4424 | #endif | |
4425 | #endif | |
4426 | ||
09dfdf85 GM |
4427 | #ifndef MAP_FAILED |
4428 | #define MAP_FAILED ((void *) -1) | |
4429 | #endif | |
4430 | ||
b86af064 | 4431 | #include <stdio.h> |
b86af064 GM |
4432 | |
4433 | #if MAP_ANON == 0 | |
4434 | #include <fcntl.h> | |
4435 | #endif | |
4436 | ||
4437 | #include "coding.h" | |
4438 | ||
4439 | ||
4440 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4441 | The current implementation lets the system select mapped | |
4442 | addresses; we're not using MAP_FIXED in general, except when | |
4443 | trying to enlarge regions. | |
4444 | ||
4445 | Each mapped region starts with a mmap_region structure, the user | |
4446 | area starts after that structure, aligned to MEM_ALIGN. | |
4447 | ||
4448 | +-----------------------+ | |
4449 | | struct mmap_info + | | |
4450 | | padding | | |
4451 | +-----------------------+ | |
4452 | | user data | | |
4453 | | | | |
4454 | | | | |
4455 | +-----------------------+ */ | |
4456 | ||
4457 | struct mmap_region | |
4458 | { | |
4459 | /* User-specified size. */ | |
4460 | size_t nbytes_specified; | |
177c0ea7 | 4461 | |
b86af064 GM |
4462 | /* Number of bytes mapped */ |
4463 | size_t nbytes_mapped; | |
4464 | ||
4465 | /* Pointer to the location holding the address of the memory | |
4466 | allocated with the mmap'd block. The variable actually points | |
4467 | after this structure. */ | |
4468 | POINTER_TYPE **var; | |
4469 | ||
4470 | /* Next and previous in list of all mmap'd regions. */ | |
4471 | struct mmap_region *next, *prev; | |
4472 | }; | |
4473 | ||
4474 | /* Doubly-linked list of mmap'd regions. */ | |
4475 | ||
4476 | static struct mmap_region *mmap_regions; | |
4477 | ||
4478 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4479 | /dev/zero will be opened on it. */ | |
4480 | ||
4481 | static int mmap_fd; | |
4482 | ||
4483 | /* Temporary storage for mmap_set_vars, see there. */ | |
4484 | ||
4485 | static struct mmap_region *mmap_regions_1; | |
4486 | static int mmap_fd_1; | |
4487 | ||
4488 | /* Page size on this system. */ | |
4489 | ||
4490 | static int mmap_page_size; | |
4491 | ||
4492 | /* 1 means mmap has been intialized. */ | |
4493 | ||
4494 | static int mmap_initialized_p; | |
4495 | ||
4496 | /* Value is X rounded up to the next multiple of N. */ | |
4497 | ||
4498 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4499 | ||
4500 | /* Size of mmap_region structure plus padding. */ | |
4501 | ||
4502 | #define MMAP_REGION_STRUCT_SIZE \ | |
4503 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4504 | ||
4505 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4506 | region, return a pointer to the start of the region. */ | |
4507 | ||
4508 | #define MMAP_REGION(P) \ | |
4509 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4510 | ||
4511 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4512 | to the start of the user-visible part of the region. */ | |
4513 | ||
4514 | #define MMAP_USER_AREA(P) \ | |
4515 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4516 | ||
4517 | #define MEM_ALIGN sizeof (double) | |
4518 | ||
7273faa1 DL |
4519 | /* Predicate returning true if part of the address range [START .. END] |
4520 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4521 | memory mapping. |
4522 | ||
4523 | Default is to conservativly assume the address range is occupied by | |
4524 | something else. This can be overridden by system configuration | |
4525 | files if system-specific means to determine this exists. */ | |
4526 | ||
4527 | #ifndef MMAP_ALLOCATED_P | |
4528 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4529 | #endif | |
4530 | ||
b86af064 GM |
4531 | /* Function prototypes. */ |
4532 | ||
f57e2426 J |
4533 | static int mmap_free_1 (struct mmap_region *); |
4534 | static int mmap_enlarge (struct mmap_region *, int); | |
4535 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4536 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4537 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4538 | static void mmap_free (POINTER_TYPE **ptr); | |
4539 | static void mmap_init (void); | |
b86af064 GM |
4540 | |
4541 | ||
4542 | /* Return a region overlapping address range START...END, or null if | |
4543 | none. END is not including, i.e. the last byte in the range | |
4544 | is at END - 1. */ | |
4545 | ||
4546 | static struct mmap_region * | |
4547 | mmap_find (start, end) | |
4548 | POINTER_TYPE *start, *end; | |
4549 | { | |
4550 | struct mmap_region *r; | |
4551 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4552 | |
b86af064 GM |
4553 | for (r = mmap_regions; r; r = r->next) |
4554 | { | |
4555 | char *rstart = (char *) r; | |
4556 | char *rend = rstart + r->nbytes_mapped; | |
4557 | ||
4558 | if (/* First byte of range, i.e. START, in this region? */ | |
4559 | (s >= rstart && s < rend) | |
4560 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4561 | || (e > rstart && e <= rend) | |
4562 | /* First byte of this region in the range? */ | |
4563 | || (rstart >= s && rstart < e) | |
4564 | /* Last byte of this region in the range? */ | |
4565 | || (rend > s && rend <= e)) | |
4566 | break; | |
4567 | } | |
4568 | ||
4569 | return r; | |
4570 | } | |
4571 | ||
4572 | ||
4573 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4574 | the region. Value is non-zero if successful. */ | |
4575 | ||
4576 | static int | |
4577 | mmap_free_1 (r) | |
4578 | struct mmap_region *r; | |
4579 | { | |
4580 | if (r->next) | |
4581 | r->next->prev = r->prev; | |
4582 | if (r->prev) | |
4583 | r->prev->next = r->next; | |
4584 | else | |
4585 | mmap_regions = r->next; | |
177c0ea7 | 4586 | |
1a15cca0 | 4587 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4588 | { |
4589 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4590 | return 0; | |
4591 | } | |
4592 | ||
4593 | return 1; | |
4594 | } | |
4595 | ||
4596 | ||
4597 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4598 | Value is non-zero if successful. */ | |
4599 | ||
4600 | static int | |
4601 | mmap_enlarge (r, npages) | |
4602 | struct mmap_region *r; | |
4603 | int npages; | |
4604 | { | |
4605 | char *region_end = (char *) r + r->nbytes_mapped; | |
4606 | size_t nbytes; | |
4607 | int success = 0; | |
4608 | ||
4609 | if (npages < 0) | |
4610 | { | |
4611 | /* Unmap pages at the end of the region. */ | |
4612 | nbytes = - npages * mmap_page_size; | |
4613 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4614 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4615 | else | |
4616 | { | |
4617 | r->nbytes_mapped -= nbytes; | |
4618 | success = 1; | |
4619 | } | |
4620 | } | |
4621 | else if (npages > 0) | |
4622 | { | |
b86af064 | 4623 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4624 | |
b86af064 GM |
4625 | /* Try to map additional pages at the end of the region. We |
4626 | cannot do this if the address range is already occupied by | |
4627 | something else because mmap deletes any previous mapping. | |
4628 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4629 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4630 | { |
4631 | POINTER_TYPE *p; | |
177c0ea7 | 4632 | |
b86af064 GM |
4633 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4634 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4635 | if (p == MAP_FAILED) | |
edaa9aed | 4636 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4637 | else if (p != (POINTER_TYPE *) region_end) |
4638 | { | |
4639 | /* Kernels are free to choose a different address. In | |
4640 | that case, unmap what we've mapped above; we have | |
4641 | no use for it. */ | |
4642 | if (munmap (p, nbytes) == -1) | |
4643 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4644 | } | |
4645 | else | |
4646 | { | |
4647 | r->nbytes_mapped += nbytes; | |
4648 | success = 1; | |
4649 | } | |
4650 | } | |
4651 | } | |
4652 | ||
4653 | return success; | |
4654 | } | |
4655 | ||
4656 | ||
4657 | /* Set or reset variables holding references to mapped regions. If | |
4658 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4659 | non-zero, set all variables to the start of the user-areas | |
4660 | of mapped regions. | |
4661 | ||
4662 | This function is called from Fdump_emacs to ensure that the dumped | |
4663 | Emacs doesn't contain references to memory that won't be mapped | |
4664 | when Emacs starts. */ | |
4665 | ||
4666 | void | |
4667 | mmap_set_vars (restore_p) | |
4668 | int restore_p; | |
4669 | { | |
4670 | struct mmap_region *r; | |
4671 | ||
4672 | if (restore_p) | |
4673 | { | |
4674 | mmap_regions = mmap_regions_1; | |
4675 | mmap_fd = mmap_fd_1; | |
4676 | for (r = mmap_regions; r; r = r->next) | |
4677 | *r->var = MMAP_USER_AREA (r); | |
4678 | } | |
4679 | else | |
4680 | { | |
4681 | for (r = mmap_regions; r; r = r->next) | |
4682 | *r->var = NULL; | |
4683 | mmap_regions_1 = mmap_regions; | |
4684 | mmap_regions = NULL; | |
4685 | mmap_fd_1 = mmap_fd; | |
4686 | mmap_fd = -1; | |
4687 | } | |
4688 | } | |
4689 | ||
4690 | ||
4691 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4692 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4693 | address of some variable which will use the data area. | |
4694 | ||
4695 | The allocation of 0 bytes is valid. | |
4696 | ||
4697 | If we can't allocate the necessary memory, set *VAR to null, and | |
4698 | return null. */ | |
4699 | ||
4700 | static POINTER_TYPE * | |
4701 | mmap_alloc (var, nbytes) | |
4702 | POINTER_TYPE **var; | |
4703 | size_t nbytes; | |
4704 | { | |
4705 | void *p; | |
4706 | size_t map; | |
4707 | ||
4708 | mmap_init (); | |
4709 | ||
4710 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4711 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4712 | mmap_fd, 0); | |
177c0ea7 | 4713 | |
b86af064 GM |
4714 | if (p == MAP_FAILED) |
4715 | { | |
4716 | if (errno != ENOMEM) | |
4717 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4718 | p = NULL; | |
4719 | } | |
4720 | else | |
4721 | { | |
4722 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4723 | |
b86af064 GM |
4724 | r->nbytes_specified = nbytes; |
4725 | r->nbytes_mapped = map; | |
4726 | r->var = var; | |
4727 | r->prev = NULL; | |
4728 | r->next = mmap_regions; | |
4729 | if (r->next) | |
4730 | r->next->prev = r; | |
4731 | mmap_regions = r; | |
177c0ea7 | 4732 | |
b86af064 GM |
4733 | p = MMAP_USER_AREA (p); |
4734 | } | |
177c0ea7 | 4735 | |
b86af064 GM |
4736 | return *var = p; |
4737 | } | |
4738 | ||
4739 | ||
4740 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4741 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4742 | and return this value. If more memory cannot be allocated, then | |
4743 | leave *VAR unchanged, and return null. */ | |
4744 | ||
4745 | static POINTER_TYPE * | |
4746 | mmap_realloc (var, nbytes) | |
4747 | POINTER_TYPE **var; | |
4748 | size_t nbytes; | |
4749 | { | |
4750 | POINTER_TYPE *result; | |
177c0ea7 | 4751 | |
b86af064 GM |
4752 | mmap_init (); |
4753 | ||
4754 | if (*var == NULL) | |
4755 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4756 | else if (nbytes == 0) |
b86af064 GM |
4757 | { |
4758 | mmap_free (var); | |
4759 | result = mmap_alloc (var, nbytes); | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | struct mmap_region *r = MMAP_REGION (*var); | |
4764 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4765 | |
b86af064 GM |
4766 | if (room < nbytes) |
4767 | { | |
4768 | /* Must enlarge. */ | |
4769 | POINTER_TYPE *old_ptr = *var; | |
4770 | ||
4771 | /* Try to map additional pages at the end of the region. | |
4772 | If that fails, allocate a new region, copy data | |
4773 | from the old region, then free it. */ | |
4774 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4775 | / mmap_page_size))) | |
4776 | { | |
4777 | r->nbytes_specified = nbytes; | |
4778 | *var = result = old_ptr; | |
4779 | } | |
4780 | else if (mmap_alloc (var, nbytes)) | |
4781 | { | |
72af86bd | 4782 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4783 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4784 | result = *var; | |
4785 | r = MMAP_REGION (result); | |
4786 | r->nbytes_specified = nbytes; | |
4787 | } | |
4788 | else | |
4789 | { | |
4790 | *var = old_ptr; | |
4791 | result = NULL; | |
4792 | } | |
4793 | } | |
4794 | else if (room - nbytes >= mmap_page_size) | |
4795 | { | |
4796 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4797 | memory back to the system. |
4798 | ||
4799 | The extra parens are to make the division happens first, | |
4800 | on positive values, so we know it will round towards | |
4801 | zero. */ | |
bb63c5c9 | 4802 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4803 | result = *var; |
4804 | r->nbytes_specified = nbytes; | |
4805 | } | |
4806 | else | |
4807 | { | |
4808 | /* Leave it alone. */ | |
4809 | result = *var; | |
4810 | r->nbytes_specified = nbytes; | |
4811 | } | |
4812 | } | |
4813 | ||
4814 | return result; | |
4815 | } | |
4816 | ||
4817 | ||
4818 | /* Free a block of relocatable storage whose data is pointed to by | |
4819 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4820 | ||
4821 | static void | |
4822 | mmap_free (var) | |
4823 | POINTER_TYPE **var; | |
4824 | { | |
4825 | mmap_init (); | |
177c0ea7 | 4826 | |
b86af064 GM |
4827 | if (*var) |
4828 | { | |
4829 | mmap_free_1 (MMAP_REGION (*var)); | |
4830 | *var = NULL; | |
4831 | } | |
4832 | } | |
4833 | ||
4834 | ||
4835 | /* Perform necessary intializations for the use of mmap. */ | |
4836 | ||
4837 | static void | |
4838 | mmap_init () | |
4839 | { | |
4840 | #if MAP_ANON == 0 | |
4841 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4842 | in a dumped Emacs. */ | |
4843 | if (mmap_fd <= 0) | |
4844 | { | |
4845 | /* No anonymous mmap -- we need the file descriptor. */ | |
4846 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4847 | if (mmap_fd == -1) | |
4848 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4849 | } | |
4850 | #endif /* MAP_ANON == 0 */ | |
4851 | ||
4852 | if (mmap_initialized_p) | |
4853 | return; | |
4854 | mmap_initialized_p = 1; | |
177c0ea7 | 4855 | |
b86af064 GM |
4856 | #if MAP_ANON != 0 |
4857 | mmap_fd = -1; | |
4858 | #endif | |
177c0ea7 | 4859 | |
b86af064 GM |
4860 | mmap_page_size = getpagesize (); |
4861 | } | |
4862 | ||
4863 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4864 | ||
4865 | ||
4866 | \f | |
4867 | /*********************************************************************** | |
4868 | Buffer-text Allocation | |
4869 | ***********************************************************************/ | |
4870 | ||
4871 | #ifdef REL_ALLOC | |
f57e2426 J |
4872 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4873 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4874 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4875 | #endif /* REL_ALLOC */ |
4876 | ||
4877 | ||
4878 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4879 | ||
4880 | static void | |
d3da34e0 | 4881 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4882 | { |
4883 | POINTER_TYPE *p; | |
177c0ea7 | 4884 | |
b86af064 GM |
4885 | BLOCK_INPUT; |
4886 | #if defined USE_MMAP_FOR_BUFFERS | |
4887 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4888 | #elif defined REL_ALLOC | |
4889 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4890 | #else | |
815add84 | 4891 | p = xmalloc (nbytes); |
b86af064 | 4892 | #endif |
177c0ea7 | 4893 | |
b86af064 GM |
4894 | if (p == NULL) |
4895 | { | |
4896 | UNBLOCK_INPUT; | |
4897 | memory_full (); | |
4898 | } | |
4899 | ||
4900 | b->text->beg = (unsigned char *) p; | |
4901 | UNBLOCK_INPUT; | |
4902 | } | |
4903 | ||
4904 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4905 | shrink it. */ | |
4906 | ||
4907 | void | |
5371d722 | 4908 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4909 | { |
4910 | POINTER_TYPE *p; | |
4911 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4912 | + delta); | |
4913 | BLOCK_INPUT; | |
4914 | #if defined USE_MMAP_FOR_BUFFERS | |
4915 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4916 | #elif defined REL_ALLOC | |
4917 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4918 | #else | |
4919 | p = xrealloc (b->text->beg, nbytes); | |
4920 | #endif | |
177c0ea7 | 4921 | |
b86af064 GM |
4922 | if (p == NULL) |
4923 | { | |
4924 | UNBLOCK_INPUT; | |
4925 | memory_full (); | |
4926 | } | |
4927 | ||
4928 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4929 | UNBLOCK_INPUT; | |
4930 | } | |
4931 | ||
4932 | ||
4933 | /* Free buffer B's text buffer. */ | |
4934 | ||
4935 | static void | |
d3da34e0 | 4936 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4937 | { |
4938 | BLOCK_INPUT; | |
4939 | ||
4940 | #if defined USE_MMAP_FOR_BUFFERS | |
4941 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4942 | #elif defined REL_ALLOC | |
4943 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4944 | #else | |
4945 | xfree (b->text->beg); | |
4946 | #endif | |
177c0ea7 | 4947 | |
b86af064 GM |
4948 | BUF_BEG_ADDR (b) = NULL; |
4949 | UNBLOCK_INPUT; | |
4950 | } | |
4951 | ||
4952 | ||
4953 | \f | |
4954 | /*********************************************************************** | |
4955 | Initialization | |
4956 | ***********************************************************************/ | |
4957 | ||
dfcf069d | 4958 | void |
d3da34e0 | 4959 | init_buffer_once (void) |
1ab256cb | 4960 | { |
7c02e886 GM |
4961 | int idx; |
4962 | ||
72af86bd | 4963 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4964 | |
1ab256cb RM |
4965 | /* Make sure all markable slots in buffer_defaults |
4966 | are initialized reasonably, so mark_buffer won't choke. */ | |
4967 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4968 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4969 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4970 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4971 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4972 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4973 | /* Prevent GC from getting confused. */ |
4974 | buffer_defaults.text = &buffer_defaults.own_text; | |
4975 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4976 | BUF_INTERVALS (&buffer_defaults) = 0; |
4977 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 4978 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 4979 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 4980 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 4981 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4982 | |
4983 | /* Set up the default values of various buffer slots. */ | |
4984 | /* Must do these before making the first buffer! */ | |
4985 | ||
f532dca0 | 4986 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4987 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4988 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4989 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4990 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4991 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4992 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4993 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 4994 | #ifndef old |
4b4deea2 | 4995 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 4996 | #endif |
4b4deea2 TT |
4997 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4998 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4999 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
5000 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
5001 | BVAR (&buffer_defaults, file_format) = Qnil; | |
5002 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
5003 | buffer_defaults.overlays_before = NULL; |
5004 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5005 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5006 | |
4b4deea2 TT |
5007 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
5008 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
5009 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
5010 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
5011 | BVAR (&buffer_defaults, bidi_display_reordering) = Qnil; | |
5012 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; | |
5013 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
5014 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
5015 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 5016 | |
4b4deea2 TT |
5017 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
5018 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
5019 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
5020 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
5021 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
5022 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
5023 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
5024 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
5025 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
5026 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
5027 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
5028 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
5029 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
5030 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
5031 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
5032 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
5033 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
5034 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
5035 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
5036 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
5037 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
5038 | |
5039 | /* Assign the local-flags to the slots that have default values. | |
5040 | The local flag is a bit that is used in the buffer | |
5041 | to say that it has its own local value for the slot. | |
5042 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5043 | ||
5044 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5045 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5046 | |
5047 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5048 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
5049 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
5050 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
5051 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
5052 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
5053 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
5054 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
5055 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
5056 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
5057 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
5058 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
5059 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
5060 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
5061 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
5062 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
5063 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
5064 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
5065 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
5066 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 5067 | |
7c02e886 | 5068 | idx = 1; |
4b4deea2 TT |
5069 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5070 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5071 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5072 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5073 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5074 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 5075 | #ifndef old |
4b4deea2 | 5076 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
54ad07d3 | 5077 | #endif |
4b4deea2 TT |
5078 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5079 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5080 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5081 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5082 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5083 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5084 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5085 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5086 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5087 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5088 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5089 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5090 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5091 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5092 | /* Make this one a permanent local. */ |
7c02e886 | 5093 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5094 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5095 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5096 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5097 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5098 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5099 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5100 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5101 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5102 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5103 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5104 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5105 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5106 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5107 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5108 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5109 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5110 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5111 | |
5112 | /* Need more room? */ | |
7313acd0 | 5113 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5114 | abort (); |
7313acd0 | 5115 | last_per_buffer_idx = idx; |
177c0ea7 | 5116 | |
1ab256cb RM |
5117 | Vbuffer_alist = Qnil; |
5118 | current_buffer = 0; | |
5119 | all_buffers = 0; | |
5120 | ||
f4265f6c | 5121 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5122 | |
d67b4f80 | 5123 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5124 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5125 | |
d67b4f80 | 5126 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5127 | |
d67b4f80 | 5128 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5129 | |
d67b4f80 | 5130 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5131 | |
d67b4f80 | 5132 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5133 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5134 | |
d67b4f80 | 5135 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5136 | |
1ab256cb | 5137 | /* super-magic invisible buffer */ |
d67b4f80 | 5138 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5139 | Vbuffer_alist = Qnil; |
5140 | ||
d67b4f80 | 5141 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5142 | |
5143 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5144 | } |
5145 | ||
dfcf069d | 5146 | void |
d3da34e0 | 5147 | init_buffer (void) |
1ab256cb | 5148 | { |
2381d133 | 5149 | char *pwd; |
136351b7 | 5150 | Lisp_Object temp; |
b639c9be | 5151 | int len; |
1ab256cb | 5152 | |
b86af064 | 5153 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5154 | { |
5155 | /* When using the ralloc implementation based on mmap(2), buffer | |
5156 | text pointers will have been set to null in the dumped Emacs. | |
5157 | Map new memory. */ | |
5158 | struct buffer *b; | |
177c0ea7 | 5159 | |
93c27ef1 GM |
5160 | for (b = all_buffers; b; b = b->next) |
5161 | if (b->text->beg == NULL) | |
b86af064 | 5162 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5163 | } |
b86af064 | 5164 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5165 | |
1ab256cb | 5166 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5167 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5168 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5169 | |
01537133 | 5170 | pwd = get_current_dir_name (); |
a17b5ed1 | 5171 | |
156bdb41 | 5172 | if (!pwd) |
a17b5ed1 | 5173 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5174 | |
1ab256cb RM |
5175 | /* Maybe this should really use some standard subroutine |
5176 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5177 | len = strlen (pwd); |
5178 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5179 | { |
156bdb41 | 5180 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5181 | pwd = (char *) realloc (pwd, len + 2); |
5182 | if (!pwd) | |
5183 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5184 | pwd[len] = DIRECTORY_SEP; |
5185 | pwd[len + 1] = '\0'; | |
f7975d07 | 5186 | } |
0995fa35 | 5187 | |
4b4deea2 TT |
5188 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5189 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5190 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5191 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5192 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5193 | BVAR (current_buffer, directory) |
5194 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5195 | |
0995fa35 RS |
5196 | /* Add /: to the front of the name |
5197 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5198 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5199 | if (! NILP (temp) |
5200 | /* If the default dir is just /, TEMP is non-nil | |
5201 | because of the ange-ftp completion handler. | |
5202 | However, it is not necessary to turn / into /:/. | |
5203 | So avoid doing that. */ | |
4b4deea2 TT |
5204 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5205 | BVAR (current_buffer, directory) | |
5206 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5207 | |
136351b7 | 5208 | temp = get_minibuffer (0); |
4b4deea2 | 5209 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5210 | |
5211 | free (pwd); | |
1ab256cb RM |
5212 | } |
5213 | ||
d6aa1876 SM |
5214 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5215 | Object stored in the current buffer. address is the address of the slot | |
5216 | in the buffer that is current now. */ | |
5217 | ||
5218 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5219 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5220 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5221 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5222 | VNAME is the name of the buffer slot. |
5223 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5224 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5225 | do { \ | |
5226 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5227 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5228 | } while (0) |
d6aa1876 SM |
5229 | |
5230 | static void | |
8ea90aa3 | 5231 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5232 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5233 | { |
ce5b453a | 5234 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5235 | int offset; |
5236 | ||
ce5b453a | 5237 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5238 | offset = (char *)address - (char *)current_buffer; |
5239 | ||
ce5b453a SM |
5240 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5241 | bo_fwd->offset = offset; | |
5242 | bo_fwd->slottype = type; | |
b9598260 | 5243 | sym->declared_special = 1; |
ce5b453a SM |
5244 | sym->redirect = SYMBOL_FORWARDED; |
5245 | { | |
5246 | /* I tried to do the job without a cast, but it seems impossible. | |
5247 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5248 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5249 | } | |
5250 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5251 | |
5252 | if (PER_BUFFER_IDX (offset) == 0) | |
5253 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5254 | slot of buffer_local_flags */ | |
5255 | abort (); | |
5256 | } | |
5257 | ||
5258 | ||
1ab256cb | 5259 | /* initialize the buffer routines */ |
dfcf069d | 5260 | void |
d3da34e0 | 5261 | syms_of_buffer (void) |
1ab256cb | 5262 | { |
9115729e KH |
5263 | staticpro (&last_overlay_modification_hooks); |
5264 | last_overlay_modification_hooks | |
5265 | = Fmake_vector (make_number (10), Qnil); | |
5266 | ||
1ab256cb RM |
5267 | staticpro (&Vbuffer_defaults); |
5268 | staticpro (&Vbuffer_local_symbols); | |
5269 | staticpro (&Qfundamental_mode); | |
5270 | staticpro (&Qmode_class); | |
5271 | staticpro (&QSFundamental); | |
5272 | staticpro (&Vbuffer_alist); | |
5273 | staticpro (&Qprotected_field); | |
5274 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5275 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5276 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5277 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5278 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5279 | staticpro (&Qoverlayp); |
d67b4f80 | 5280 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5281 | staticpro (&Qevaporate); |
d67b4f80 | 5282 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5283 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5284 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5285 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5286 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5287 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5288 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5289 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5290 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5291 | staticpro (&Qpriority); |
d67b4f80 | 5292 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5293 | staticpro (&Qbefore_string); |
d67b4f80 | 5294 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5295 | staticpro (&Qafter_string); |
d67b4f80 | 5296 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5297 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5298 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5299 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5300 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5301 | staticpro (&Qafter_change_functions); |
2f7a359d | 5302 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5303 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5304 | |
d67b4f80 | 5305 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5306 | staticpro (&Qkill_buffer_query_functions); |
5307 | ||
1ab256cb | 5308 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5309 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5310 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5311 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5312 | |
422745d0 TT |
5313 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5314 | mode_line_format, | |
5315 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5316 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5317 | |
422745d0 TT |
5318 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5319 | header_line_format, | |
5320 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5321 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5322 | |
422745d0 TT |
5323 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5324 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5325 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5326 | |
422745d0 TT |
5327 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5328 | extra_line_spacing, | |
5329 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5330 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5331 | |
422745d0 TT |
5332 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5333 | cursor_in_non_selected_windows, | |
5334 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5335 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5336 | ||
422745d0 TT |
5337 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5338 | abbrev_mode, | |
5339 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5340 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5341 | |
422745d0 TT |
5342 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5343 | ctl_arrow, | |
5344 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5345 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5346 | |
422745d0 TT |
5347 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5348 | enable_multibyte_characters, | |
5349 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5350 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5351 | |
422745d0 TT |
5352 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5353 | buffer_file_coding_system, | |
5354 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5355 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5356 | |
422745d0 TT |
5357 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5358 | truncate_lines, | |
5359 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5360 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5361 | |
422745d0 TT |
5362 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5363 | fill_column, | |
5364 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5365 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5366 | |
422745d0 TT |
5367 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5368 | left_margin, | |
5369 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5370 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5371 | |
422745d0 TT |
5372 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5373 | tab_width, | |
5374 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5375 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5376 | |
422745d0 TT |
5377 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5378 | case_fold_search, | |
5379 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5380 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5381 | |
422745d0 TT |
5382 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5383 | left_margin_cols, | |
5384 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5385 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5386 | |
422745d0 TT |
5387 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5388 | right_margin_cols, | |
5389 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5390 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5391 | |
422745d0 TT |
5392 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5393 | left_fringe_width, | |
5394 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5395 | This is the same as (default-value 'left-fringe-width). */); |
5396 | ||
422745d0 TT |
5397 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5398 | right_fringe_width, | |
5399 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5400 | This is the same as (default-value 'right-fringe-width). */); |
5401 | ||
422745d0 TT |
5402 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5403 | fringes_outside_margins, | |
5404 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5405 | This is the same as (default-value 'fringes-outside-margins). */); |
5406 | ||
422745d0 TT |
5407 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5408 | scroll_bar_width, | |
5409 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5410 | This is the same as (default-value 'scroll-bar-width). */); |
5411 | ||
422745d0 TT |
5412 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5413 | vertical_scroll_bar_type, | |
5414 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5415 | This is the same as (default-value 'vertical-scroll-bar). */); |
5416 | ||
422745d0 TT |
5417 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5418 | indicate_empty_lines, | |
5419 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5420 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5421 | |
422745d0 TT |
5422 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5423 | indicate_buffer_boundaries, | |
5424 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5425 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5426 | ||
422745d0 TT |
5427 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5428 | fringe_indicator_alist, | |
5429 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5430 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5431 | ||
422745d0 TT |
5432 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5433 | fringe_cursor_alist, | |
5434 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5435 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5436 | ||
422745d0 TT |
5437 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5438 | scroll_up_aggressively, | |
5439 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5440 | This value applies in buffers that don't have their own local values. |
fc961256 | 5441 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5442 | |
422745d0 TT |
5443 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5444 | scroll_down_aggressively, | |
5445 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5446 | This value applies in buffers that don't have their own local values. |
fc961256 | 5447 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5448 | |
045dee35 | 5449 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5450 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5451 | Qnil, |
7614d762 RS |
5452 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5453 | The header line appears, optionally, at the top of a window; | |
5454 | the mode line appears at the bottom. */); | |
177c0ea7 | 5455 | |
4b4deea2 | 5456 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5457 | Qnil, |
5458 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5459 | Each buffer has its own value of this variable. |
5460 | Value may be nil, a string, a symbol or a list or cons cell. | |
5461 | A value of nil means don't display a mode line. | |
5462 | For a symbol, its value is used (but it is ignored if t or nil). | |
5463 | A string appearing directly as the value of a symbol is processed verbatim | |
5464 | in that the %-constructs below are not recognized. | |
ed463255 | 5465 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5466 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5467 | in the value of that symbol will be ignored. |
018ba359 | 5468 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5469 | is used as a mode line element. Be careful--FORM should not load any files, |
5470 | because that can cause an infinite recursion. | |
ed463255 KS |
5471 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5472 | with the specified properties PROPS applied. | |
018ba359 PJ |
5473 | For a list whose car is a symbol, the symbol's value is taken, |
5474 | and if that is non-nil, the cadr of the list is processed recursively. | |
5475 | Otherwise, the caddr of the list (if there is one) is processed. | |
5476 | For a list whose car is a string or list, each element is processed | |
5477 | recursively and the results are effectively concatenated. | |
5478 | For a list whose car is an integer, the cdr of the list is processed | |
5479 | and padded (if the number is positive) or truncated (if negative) | |
5480 | to the width specified by that number. | |
5481 | A string is printed verbatim in the mode line except for %-constructs: | |
5482 | (%-constructs are allowed when the string is the entire mode-line-format | |
5483 | or when it is found in a cons-cell or a list) | |
5484 | %b -- print buffer name. %f -- print visited file name. | |
5485 | %F -- print frame name. | |
5486 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5487 | %& is like %*, but ignore read-only-ness. | |
5488 | % means buffer is read-only and * means it is modified. | |
5489 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5490 | %s -- print process status. %l -- print the current line number. | |
5491 | %c -- print the current column number (this makes editing slower). | |
5492 | To make the column number update correctly in all cases, | |
5493 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5494 | %i -- print the size of the buffer. |
5495 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5496 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5497 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5498 | or print Bottom or All. | |
018ba359 | 5499 | %n -- print Narrow if appropriate. |
dafbe726 | 5500 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5501 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5502 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5503 | %e -- print error message about full memory. |
f7165034 NR |
5504 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5505 | remote machine. | |
018ba359 PJ |
5506 | %[ -- print one [ for each recursive editing level. %] similar. |
5507 | %% -- print %. %- -- print infinitely many dashes. | |
5508 | Decimal digits after the % specify field width to which to pad. */); | |
5509 | ||
422745d0 TT |
5510 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
5511 | doc: /* *Value of `major-mode' for new buffers. */); | |
1ab256cb | 5512 | |
4b4deea2 | 5513 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5514 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5515 | doc: /* Symbol for current buffer's major mode. |
5516 | The default value (normally `fundamental-mode') affects new buffers. | |
5517 | A value of nil means to use the current buffer's major mode, provided | |
5518 | it is not marked as "special". | |
5519 | ||
5520 | When a mode is used by default, `find-file' switches to it before it | |
5521 | reads the contents into the buffer and before it finishes setting up | |
5522 | the buffer. Thus, the mode and its hooks should not expect certain | |
5523 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5524 | to be set up. */); | |
1ab256cb | 5525 | |
4b4deea2 | 5526 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5527 | Qnil, |
64a7c220 | 5528 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5529 | Usually a string, but can use any of the constructs for `mode-line-format', |
5530 | which see. | |
5531 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5532 | |
4b4deea2 | 5533 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5534 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5535 | ||
4b4deea2 | 5536 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5537 | doc: /* Non-nil if Abbrev mode is enabled. |
5538 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5539 | |
4b4deea2 | 5540 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5541 | Qnil, |
efc7e75f | 5542 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5543 | |
4b4deea2 | 5544 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5545 | make_number (LISP_INT_TAG), |
1ac5826d | 5546 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5547 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5548 | |
4b4deea2 | 5549 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5550 | make_number (LISP_INT_TAG), |
fc961256 | 5551 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5552 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5553 | |
4b4deea2 | 5554 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5555 | make_number (LISP_INT_TAG), |
efc7e75f | 5556 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5557 | |
4b4deea2 | 5558 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
efc7e75f | 5559 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5560 | A value of nil means use backslash and octal digits. |
5561 | This variable does not apply to characters whose display is specified | |
5562 | in the current display table (if there is one). */); | |
1ab256cb | 5563 | |
3b06f880 | 5564 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5565 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5566 | Qnil, |
efc7e75f | 5567 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5568 | Otherwise they are regarded as unibyte. This affects the display, |
5569 | file I/O and the behavior of various editing commands. | |
5570 | ||
5571 | This variable is buffer-local but you cannot set it directly; | |
5572 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5573 | Changing its default value with `setq-default' is supported. | |
5574 | See also variable `default-enable-multibyte-characters' and Info node | |
5575 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5576 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5577 | |
c71b5d9b | 5578 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5579 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5580 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5581 | This variable applies to saving the buffer, and also to `write-region' |
5582 | and other functions that use `write-region'. | |
5583 | It does not apply to sending output to subprocesses, however. | |
5584 | ||
5585 | If this is nil, the buffer is saved without any code conversion | |
5586 | unless some coding system is specified in `file-coding-system-alist' | |
5587 | for the buffer file. | |
5588 | ||
31a6cb06 EZ |
5589 | If the text to be saved cannot be encoded as specified by this variable, |
5590 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5591 | ||
018ba359 PJ |
5592 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5593 | ||
5594 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5595 | |
f44e260c | 5596 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5597 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5598 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5599 | |
6c0cf218 | 5600 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5601 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
b44d9321 | 5602 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5603 | |
b44d9321 EZ |
5604 | If this is nil (the default), the direction of each paragraph is |
5605 | determined by the first strong directional character of its text. | |
5606 | The values of `right-to-left' and `left-to-right' override that. | |
5607 | Any other value is treated as nil. | |
b4bf28b7 | 5608 | |
b44d9321 EZ |
5609 | This variable has no effect unless the buffer's value of |
5610 | \`bidi-display-reordering' is non-nil. */); | |
5611 | ||
4b4deea2 | 5612 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
7614d762 RS |
5613 | doc: /* *Non-nil means do not display continuation lines. |
5614 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5615 | |
5616 | Note that this is overridden by the variable | |
5617 | `truncate-partial-width-windows' if that variable is non-nil | |
5618 | and this buffer is not full-frame width. */); | |
1ab256cb | 5619 | |
4b4deea2 | 5620 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
0858cd02 CY |
5621 | doc: /* *Non-nil means to use word-wrapping for continuation lines. |
5622 | When word-wrapping is on, continuation lines are wrapped at the space | |
5623 | or tab character nearest to the right window edge. | |
5624 | If nil, continuation lines are wrapped at the right screen edge. | |
5625 | ||
5626 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5627 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5628 | word-wrapping, you might want to reduce the value of | |
5629 | `truncate-partial-width-windows', since wrapping can make text readable | |
5630 | in narrower windows. */); | |
0858cd02 | 5631 | |
4b4deea2 | 5632 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5633 | make_number (Lisp_String), |
efc7e75f | 5634 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5635 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5636 | |
4b4deea2 | 5637 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5638 | Qnil, |
efc7e75f | 5639 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5640 | It is called after self-inserting any character specified in |
5641 | the `auto-fill-chars' table. | |
5642 | NOTE: This variable is not a hook; | |
5643 | its value may not be a list of functions. */); | |
1ab256cb | 5644 | |
4b4deea2 | 5645 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5646 | make_number (Lisp_String), |
efc7e75f | 5647 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5648 | |
4b4deea2 | 5649 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5650 | make_number (Lisp_String), |
efc7e75f | 5651 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5652 | The truename of a file is calculated by `file-truename' |
5653 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5654 | |
1ab256cb | 5655 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5656 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5657 | make_number (Lisp_String), |
7614d762 RS |
5658 | doc: /* Name of file for auto-saving current buffer. |
5659 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5660 | |
4b4deea2 | 5661 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5662 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5663 | |
4b4deea2 | 5664 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5665 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5666 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5667 | |
4b4deea2 | 5668 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5669 | make_number (LISP_INT_TAG), |
efc7e75f | 5670 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5671 | 0 initially. |
5672 | -1 means auto-saving turned off until next real save. | |
5673 | ||
5674 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5675 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5676 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5677 | |
4b4deea2 | 5678 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5679 | Qnil, |
7614d762 | 5680 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5681 | An integer N as value means display only lines |
5682 | that start with less than N columns of space. | |
7614d762 RS |
5683 | A value of t means that the character ^M makes itself and |
5684 | all the rest of the line invisible; also, when saving the buffer | |
5685 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5686 | |
5687 | #ifndef old | |
5688 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5689 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5690 | Qnil, |
3f676284 | 5691 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5692 | #endif |
5693 | ||
4b4deea2 | 5694 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5695 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5696 | The value should be one of `overwrite-mode-textual', |
5697 | `overwrite-mode-binary', or nil. | |
5698 | If it is `overwrite-mode-textual', self-insertion still | |
5699 | inserts at the end of a line, and inserts when point is before a tab, | |
5700 | until the tab is filled in. | |
5701 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5702 | ||
4b4deea2 | 5703 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5704 | Qnil, |
efc7e75f | 5705 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5706 | |
5707 | If this variable is nil, the value of `standard-display-table' is used. | |
5708 | Each window can have its own, overriding display table, see | |
5709 | `set-window-display-table' and `window-display-table'. | |
5710 | ||
5711 | The display table is a char-table created with `make-display-table'. | |
5712 | A char-table is an array indexed by character codes. Normal array | |
5713 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5714 | ||
5715 | Each of the char-table elements control how to display the corresponding | |
5716 | text character: the element at index C in the table says how to display | |
5717 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5718 | characters or nil. The value nil means display the character in the |
5719 | default fashion; otherwise, the characters from the vector are delivered | |
5720 | to the screen instead of the original character. | |
018ba359 | 5721 | |
5fd11dc8 | 5722 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5723 | to display a capital Y instead of each X character. |
018ba359 PJ |
5724 | |
5725 | In addition, a char-table has six extra slots to control the display of: | |
5726 | ||
5727 | the end of a truncated screen line (extra-slot 0, a single character); | |
5728 | the end of a continued line (extra-slot 1, a single character); | |
5729 | the escape character used to display character codes in octal | |
5730 | (extra-slot 2, a single character); | |
5731 | the character used as an arrow for control characters (extra-slot 3, | |
5732 | a single character); | |
5733 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5734 | a vector of characters); | |
5735 | the character used to draw the border between side-by-side windows | |
5736 | (extra-slot 5, a single character). | |
5737 | ||
5738 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5739 | |
4b4deea2 | 5740 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5741 | Qnil, |
efc7e75f | 5742 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5743 | A value of nil means no marginal area. */); |
177c0ea7 | 5744 | |
4b4deea2 | 5745 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5746 | Qnil, |
efc7e75f | 5747 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5748 | A value of nil means no marginal area. */); |
177c0ea7 | 5749 | |
4b4deea2 | 5750 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a KS |
5751 | Qnil, |
5752 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5753 | A value of 0 means no left fringe is shown in this buffer's window. | |
5754 | A value of nil means to use the left fringe width from the window's frame. */); | |
5755 | ||
4b4deea2 | 5756 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a KS |
5757 | Qnil, |
5758 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5759 | A value of 0 means no right fringe is shown in this buffer's window. | |
5760 | A value of nil means to use the right fringe width from the window's frame. */); | |
5761 | ||
4b4deea2 | 5762 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a KS |
5763 | Qnil, |
5764 | doc: /* *Non-nil means to display fringes outside display margins. | |
5765 | A value of nil means to display fringes between margins and buffer text. */); | |
5766 | ||
4b4deea2 | 5767 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a KS |
5768 | Qnil, |
5769 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5770 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5771 | ||
4b4deea2 | 5772 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a KS |
5773 | Qnil, |
5774 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5775 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5776 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5777 | |
fc2c8887 RS |
5778 | A value of `left' or `right' means put the vertical scroll bar at that side |
5779 | of the window; a value of nil means don't show any vertical scroll bars. | |
5780 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5781 | |
0552666b | 5782 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5783 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
efc7e75f | 5784 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5785 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5786 | window-systems. */); | |
177c0ea7 | 5787 | |
6b61353c | 5788 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5789 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
6b61353c KH |
5790 | doc: /* *Visually indicate buffer boundaries and scrolling. |
5791 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5792 | of a window on window-systems with angle bitmaps, or if the window can be | |
5793 | scrolled, the top and bottom line of the window are marked with up and down | |
5794 | arrow bitmaps. | |
b2229037 KS |
5795 | |
5796 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5797 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5798 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5799 | the left fringe but no arrows. |
b2229037 | 5800 | |
79e3497d RS |
5801 | You can exercise more precise control by using an alist as the |
5802 | value. Each alist element (INDICATOR . POSITION) specifies | |
5803 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5804 | `bottom', `up', `down', or t, which specifies the default position, |
5805 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5806 | this indicator. | |
5807 | ||
5808 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5809 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5810 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5811 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5812 | |
c6a46372 | 5813 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5814 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
c6a46372 KS |
5815 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. |
5816 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5817 | specifies the fringe bitmaps used to display a specific logical | |
5818 | fringe indicator. | |
5819 | ||
5820 | INDICATOR specifies the logical indicator type which is one of the | |
5821 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5822 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5823 | |
14fb5704 | 5824 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5825 | the actual bitmap shown in the left or right fringe for the logical |
5826 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5827 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5828 | are used only for the `bottom' and `top-bottom' indicators when the |
5829 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5830 | symbol which is used in both left and right fringes. */); |
5831 | ||
5832 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5833 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
c6a46372 KS |
5834 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. |
5835 | The value is an alist where each element (CURSOR . BITMAP) | |
5836 | specifies the fringe bitmaps used to display a specific logical | |
5837 | cursor type in the fringe. | |
5838 | ||
5839 | CURSOR specifies the logical cursor type which is one of the following | |
5840 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5841 | one is used to show a hollow cursor on narrow lines display lines | |
5842 | where the normal hollow cursor will not fit. | |
5843 | ||
5844 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5845 | cursor type. */); | |
5846 | ||
0552666b | 5847 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5848 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5849 | doc: /* How far to scroll windows upward. |
5850 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5851 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5852 | means scroll to center point. A fraction means scroll to put point |
5853 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5854 | When the value is 0.0, point goes at the bottom line, which in the |
5855 | simple case that you moved off with C-f means scrolling just one line. | |
5856 | 1.0 means point goes at the top, so that in that simple case, the | |
5857 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5858 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5859 | |
0552666b | 5860 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5861 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5862 | doc: /* How far to scroll windows downward. |
5863 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5864 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5865 | means scroll to center point. A fraction means scroll to put point |
5866 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5867 | When the value is 0.0, point goes at the top line, which in the |
5868 | simple case that you moved off with C-b means scrolling just one line. | |
5869 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5870 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5871 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5872 | |
1ab256cb RM |
5873 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5874 | "Don't ask."); | |
5875 | */ | |
1ab256cb | 5876 | |
29208e82 | 5877 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5878 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5879 | Two arguments are passed to each function: the positions of |
5880 | the beginning and end of the range of old text to be changed. | |
5881 | \(For an insertion, the beginning and end are at the same place.) | |
5882 | No information is given about the length of the text after the change. | |
5883 | ||
5884 | Buffer changes made while executing the `before-change-functions' | |
5885 | don't call any before-change or after-change functions. | |
7b2bf907 | 5886 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5887 | |
5888 | If an unhandled error happens in running these functions, | |
5889 | the variable's value remains nil. That prevents the error | |
5890 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5891 | Vbefore_change_functions = Qnil; |
5892 | ||
29208e82 | 5893 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5894 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5895 | Three arguments are passed to each function: the positions of |
5896 | the beginning and end of the range of changed text, | |
5897 | and the length in bytes of the pre-change text replaced by that range. | |
5898 | \(For an insertion, the pre-change length is zero; | |
5899 | for a deletion, that length is the number of bytes deleted, | |
5900 | and the post-change beginning and end are at the same place.) | |
5901 | ||
5902 | Buffer changes made while executing the `after-change-functions' | |
5903 | don't call any before-change or after-change functions. | |
7b2bf907 | 5904 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5905 | |
5906 | If an unhandled error happens in running these functions, | |
5907 | the variable's value remains nil. That prevents the error | |
5908 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5909 | Vafter_change_functions = Qnil; |
5910 | ||
29208e82 | 5911 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5912 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5913 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5914 | Vfirst_change_hook = Qnil; |
1ab256cb | 5915 | |
4b4deea2 | 5916 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5917 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5918 | Recent changes come first; older changes follow newer. |
5919 | ||
5920 | An entry (BEG . END) represents an insertion which begins at | |
5921 | position BEG and ends at position END. | |
5922 | ||
5923 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5924 | from (abs POSITION). If POSITION is positive, point was at the front | |
5925 | of the text being deleted; if negative, point was at the end. | |
5926 | ||
5927 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5928 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5929 | of the visited file's modification time, as of that time. If the | |
5930 | modification time of the most recent save is different, this entry is | |
5931 | obsolete. | |
5932 | ||
5933 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5934 | was modified between BEG and END. PROPERTY is the property name, | |
5935 | and VALUE is the old value. | |
5936 | ||
7405f386 KS |
5937 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5938 | \(apply FUN-NAME ARGS). | |
5939 | ||
5940 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5941 | in the active region. BEG and END is the range affected by this entry | |
5942 | and DELTA is the number of bytes added or deleted in that range by | |
5943 | this change. | |
c6c7dc03 | 5944 | |
018ba359 PJ |
5945 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5946 | was adjusted in position by the offset DISTANCE (an integer). | |
5947 | ||
5948 | An entry of the form POSITION indicates that point was at the buffer | |
5949 | location given by the integer. Undoing an entry of this form places | |
5950 | point at POSITION. | |
5951 | ||
b4c4f2f4 JB |
5952 | Entries with value `nil' mark undo boundaries. The undo command treats |
5953 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5954 | |
5955 | If the value of the variable is t, undo information is not recorded. */); | |
5956 | ||
4b4deea2 | 5957 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5958 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5959 | |
4b4deea2 | 5960 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5961 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5962 | |
5963 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5964 | newlines. Columnar operations (like `move-to-column' and |
5965 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5966 | widths as they go. This works well for ordinary text, but if the |
5967 | buffer's lines are very long (say, more than 500 characters), these | |
5968 | motion functions will take longer to execute. Emacs may also take | |
5969 | longer to update the display. | |
5970 | ||
5629f29b | 5971 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5972 | results of their scans, and consult the cache to avoid rescanning |
5973 | regions of the buffer until the text is modified. The caches are most | |
5974 | beneficial when they prevent the most searching---that is, when the | |
5975 | buffer contains long lines and large regions of characters with the | |
5976 | same, fixed screen width. | |
5977 | ||
5629f29b | 5978 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5979 | become slightly slower (because of the overhead of consulting the |
5980 | cache), and the caches will use memory roughly proportional to the | |
5981 | number of newlines and characters whose screen width varies. | |
5982 | ||
5983 | The caches require no explicit maintenance; their accuracy is | |
5984 | maintained internally by the Emacs primitives. Enabling or disabling | |
5985 | the cache should not affect the behavior of any of the motion | |
5986 | functions; it should only affect their performance. */); | |
5987 | ||
4b4deea2 | 5988 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5989 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5990 | |
4b4deea2 | 5991 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5992 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5993 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5994 | set when a file is visited. */); |
be9aafdd | 5995 | |
71ed49fa | 5996 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5997 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
71ed49fa LT |
5998 | doc: /* *Format in which to write auto-save files. |
5999 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6000 | If it is t, which is the default, auto-save files are written in the | |
6001 | same format as a regular save would use. */); | |
6002 | ||
3cb719bd | 6003 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 6004 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 6005 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
6006 | The default is t, which means that text is invisible |
6007 | if it has a non-nil `invisible' property. | |
6008 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6009 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6010 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6011 | then characters with property value PROP are invisible, | |
6012 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6013 | |
7962a441 | 6014 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 6015 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 6016 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 6017 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6018 | |
6019 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 6020 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 6021 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
6022 | The function `set-window-buffer' updates this variable |
6023 | to the value obtained by calling `current-time'. | |
6024 | If the buffer has never been shown in a window, the value is nil. */); | |
6025 | ||
29208e82 | 6026 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
6027 | doc: /* Non-nil if Transient Mark mode is enabled. |
6028 | See the command `transient-mark-mode' for a description of this minor mode. | |
6029 | ||
6030 | Non-nil also enables highlighting of the region whenever the mark is active. | |
6031 | The variable `highlight-nonselected-windows' controls whether to highlight | |
6032 | all windows or just the selected window. | |
6033 | ||
f49d1f52 | 6034 | Lisp programs may give this variable certain special values: |
9d794026 | 6035 | |
f49d1f52 SM |
6036 | - A value of `lambda' enables Transient Mark mode temporarily. |
6037 | It is disabled again after any subsequent action that would | |
6038 | normally deactivate the mark (e.g. buffer modification). | |
6039 | ||
6040 | - A value of (only . OLDVAL) enables Transient Mark mode | |
6041 | temporarily. After any subsequent point motion command that is | |
6042 | not shift-translated, or any other action that would normally | |
6043 | deactivate the mark (e.g. buffer modification), the value of | |
6044 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
6045 | Vtransient_mark_mode = Qnil; |
6046 | ||
29208e82 | 6047 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
7ee72033 | 6048 | doc: /* *Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
6049 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6050 | text properties. If the value is a list, disregard `buffer-read-only' | |
6051 | and disregard a `read-only' text property if the property value | |
6052 | is a member of the list. */); | |
a96b68f1 RS |
6053 | Vinhibit_read_only = Qnil; |
6054 | ||
4b4deea2 | 6055 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 6056 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6057 | Values are interpreted as follows: |
6058 | ||
b8dc613f JB |
6059 | t use the cursor specified for the frame |
6060 | nil don't display a cursor | |
6061 | box display a filled box cursor | |
6062 | hollow display a hollow box cursor | |
6063 | bar display a vertical bar cursor with default width | |
6064 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6065 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6066 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6067 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6068 | |
e08b1705 MR |
6069 | When the buffer is displayed in a non-selected window, the |
6070 | cursor's appearance is instead controlled by the variable | |
6071 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6072 | |
a3bbced0 | 6073 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6074 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6075 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6076 | The space is measured in pixels, and put below lines on graphic displays, |
6077 | see `display-graphic-p'. | |
60ebfdf3 | 6078 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6079 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6080 | |
0124c5bd | 6081 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6082 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
66c6abf0 GM |
6083 | doc: /* *Non-nil means show a cursor in non-selected windows. |
6084 | If nil, only shows a cursor in the selected window. | |
6085 | If t, displays a cursor related to the usual cursor type | |
6086 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6087 | You can also specify the cursor type as in the `cursor-type' variable. | |
6088 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6089 | |
29208e82 | 6090 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6091 | doc: /* List of functions called with no args to query before killing a buffer. |
6092 | The buffer being killed will be current while the functions are running. | |
6093 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6094 | Vkill_buffer_query_functions = Qnil; |
6095 | ||
29208e82 | 6096 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6097 | doc: /* Normal hook run before changing the major mode of a buffer. |
6098 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6099 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6100 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6101 | staticpro (&Qchange_major_mode_hook); |
6102 | ||
0dc88e60 | 6103 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6104 | defsubr (&Sbuffer_list); |
6105 | defsubr (&Sget_buffer); | |
6106 | defsubr (&Sget_file_buffer); | |
6107 | defsubr (&Sget_buffer_create); | |
336cd056 | 6108 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6109 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6110 | defsubr (&Sbuffer_name); |
6111 | /*defsubr (&Sbuffer_number);*/ | |
6112 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6113 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6114 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6115 | defsubr (&Sbuffer_local_variables); |
6116 | defsubr (&Sbuffer_modified_p); | |
6117 | defsubr (&Sset_buffer_modified_p); | |
6118 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6119 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6120 | defsubr (&Srename_buffer); |
6121 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6122 | defsubr (&Sbuffer_enable_undo); |
6123 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6124 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6125 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6126 | defsubr (&Scurrent_buffer); |
6127 | defsubr (&Sset_buffer); | |
6128 | defsubr (&Sbarf_if_buffer_read_only); | |
6129 | defsubr (&Sbury_buffer); | |
3ac81adb | 6130 | defsubr (&Serase_buffer); |
13cda5f9 | 6131 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6132 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6133 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6134 | |
52f8ec73 | 6135 | defsubr (&Soverlayp); |
2eec3b4e RS |
6136 | defsubr (&Smake_overlay); |
6137 | defsubr (&Sdelete_overlay); | |
6138 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6139 | defsubr (&Soverlay_start); |
6140 | defsubr (&Soverlay_end); | |
6141 | defsubr (&Soverlay_buffer); | |
6142 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6143 | defsubr (&Soverlays_at); |
74514898 | 6144 | defsubr (&Soverlays_in); |
2eec3b4e | 6145 | defsubr (&Snext_overlay_change); |
239c932b | 6146 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6147 | defsubr (&Soverlay_recenter); |
6148 | defsubr (&Soverlay_lists); | |
6149 | defsubr (&Soverlay_get); | |
6150 | defsubr (&Soverlay_put); | |
a8c21b48 | 6151 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6152 | } |
6153 | ||
dfcf069d | 6154 | void |
d3da34e0 | 6155 | keys_of_buffer (void) |
1ab256cb RM |
6156 | { |
6157 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6158 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6159 | |
6160 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6161 | initialized when that function gets called. */ | |
d67b4f80 | 6162 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6163 | } |