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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). | |
179dade4 | 46 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
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 | |
cd64ea1d PE |
103 | static Lisp_Object Fset_buffer_major_mode (Lisp_Object); |
104 | static Lisp_Object Fdelete_overlay (Lisp_Object); | |
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 | ||
955cbe7b | 116 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 117 | |
43ed3b8d | 118 | /* Hook run before changing a major mode. */ |
955cbe7b | 119 | static 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; | |
955cbe7b | 124 | static Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 125 | |
955cbe7b PE |
126 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
127 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 128 | |
955cbe7b | 129 | static Lisp_Object Qprotected_field; |
1ab256cb | 130 | |
955cbe7b | 131 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 132 | |
955cbe7b | 133 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 134 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 135 | |
955cbe7b | 136 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 137 | |
955cbe7b | 138 | static Lisp_Object Qoverlayp; |
52f8ec73 | 139 | |
955cbe7b | 140 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 141 | |
955cbe7b | 142 | static Lisp_Object Qevaporate; |
5985d248 | 143 | |
294d215f RS |
144 | Lisp_Object Qmodification_hooks; |
145 | Lisp_Object Qinsert_in_front_hooks; | |
146 | Lisp_Object Qinsert_behind_hooks; | |
147 | ||
f57e2426 J |
148 | static void alloc_buffer_text (struct buffer *, size_t); |
149 | static void free_buffer_text (struct buffer *b); | |
150 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
151 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
152 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 153 | |
1ab256cb RM |
154 | /* For debugging; temporary. See set_buffer_internal. */ |
155 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
156 | ||
01136e9b | 157 | void |
d3da34e0 | 158 | nsberror (Lisp_Object spec) |
1ab256cb | 159 | { |
a7a60ce9 | 160 | if (STRINGP (spec)) |
d5db4077 | 161 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
162 | error ("Invalid buffer argument"); |
163 | } | |
164 | \f | |
a7ca3326 | 165 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
166 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
167 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 168 | (Lisp_Object object) |
0dc88e60 | 169 | { |
4b4deea2 | 170 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
171 | ? Qt : Qnil); |
172 | } | |
173 | ||
08460cd4 | 174 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 175 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
176 | If the optional arg FRAME is a frame, we return the buffer list in the |
177 | proper order for that frame: the buffers show in FRAME come first, | |
178 | followed by the rest of the buffers. */) | |
5842a27b | 179 | (Lisp_Object frame) |
1ab256cb | 180 | { |
a18b8cb5 | 181 | Lisp_Object general; |
08460cd4 RS |
182 | general = Fmapcar (Qcdr, Vbuffer_alist); |
183 | ||
184 | if (FRAMEP (frame)) | |
185 | { | |
a18b8cb5 KL |
186 | Lisp_Object framelist, prevlist, tail; |
187 | Lisp_Object args[3]; | |
08460cd4 | 188 | |
b7826503 | 189 | CHECK_FRAME (frame); |
08460cd4 | 190 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f MR |
191 | prevlist = Fnreverse (Fcopy_sequence |
192 | (XFRAME (frame)->buried_buffer_list)); | |
08460cd4 | 193 | |
a18b8cb5 KL |
194 | /* Remove from GENERAL any buffer that duplicates one in |
195 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 196 | tail = framelist; |
a18b8cb5 | 197 | while (CONSP (tail)) |
08460cd4 | 198 | { |
7539e11f KR |
199 | general = Fdelq (XCAR (tail), general); |
200 | tail = XCDR (tail); | |
08460cd4 | 201 | } |
a18b8cb5 KL |
202 | tail = prevlist; |
203 | while (CONSP (tail)) | |
204 | { | |
205 | general = Fdelq (XCAR (tail), general); | |
206 | tail = XCDR (tail); | |
207 | } | |
208 | ||
209 | args[0] = framelist; | |
210 | args[1] = general; | |
211 | args[2] = prevlist; | |
212 | return Fnconc (3, args); | |
08460cd4 | 213 | } |
9397e56f MR |
214 | else |
215 | return general; | |
1ab256cb RM |
216 | } |
217 | ||
04ae1b48 RS |
218 | /* Like Fassoc, but use Fstring_equal to compare |
219 | (which ignores text properties), | |
220 | and don't ever QUIT. */ | |
221 | ||
222 | static Lisp_Object | |
d3da34e0 | 223 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
224 | { |
225 | register Lisp_Object tail; | |
6d70a280 | 226 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
227 | { |
228 | register Lisp_Object elt, tem; | |
6d70a280 | 229 | elt = XCAR (tail); |
04ae1b48 RS |
230 | tem = Fstring_equal (Fcar (elt), key); |
231 | if (!NILP (tem)) | |
232 | return elt; | |
233 | } | |
234 | return Qnil; | |
235 | } | |
236 | ||
a7ca3326 | 237 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
238 | doc: /* Return the buffer named BUFFER-OR-NAME. |
239 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
240 | is a string and there is no buffer with that name, return nil. If | |
241 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 242 | (register Lisp_Object buffer_or_name) |
1ab256cb | 243 | { |
c8804c4f MR |
244 | if (BUFFERP (buffer_or_name)) |
245 | return buffer_or_name; | |
246 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 247 | |
c8804c4f | 248 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
249 | } |
250 | ||
251 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 252 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
253 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
254 | If there is no such live buffer, return nil. | |
7ee72033 | 255 | See also `find-buffer-visiting'. */) |
5842a27b | 256 | (register Lisp_Object filename) |
1ab256cb RM |
257 | { |
258 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
259 | Lisp_Object handler; |
260 | ||
b7826503 | 261 | CHECK_STRING (filename); |
1ab256cb RM |
262 | filename = Fexpand_file_name (filename, Qnil); |
263 | ||
5fe0b67e RS |
264 | /* If the file name has special constructs in it, |
265 | call the corresponding file handler. */ | |
a617e913 | 266 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
267 | if (!NILP (handler)) |
268 | return call2 (handler, Qget_file_buffer, filename); | |
269 | ||
7539e11f | 270 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 271 | { |
7539e11f | 272 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 273 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
274 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
275 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 276 | if (!NILP (tem)) |
1ab256cb RM |
277 | return buf; |
278 | } | |
279 | return Qnil; | |
280 | } | |
281 | ||
52e01189 | 282 | Lisp_Object |
d3da34e0 | 283 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
284 | { |
285 | register Lisp_Object tail, buf, tem; | |
286 | ||
7539e11f | 287 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 288 | { |
7539e11f | 289 | buf = Fcdr (XCAR (tail)); |
52e01189 | 290 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
291 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
292 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
293 | if (!NILP (tem)) |
294 | return buf; | |
295 | } | |
296 | return Qnil; | |
297 | } | |
298 | ||
a7ca3326 | 299 | DEFUN ("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)) |
531b0165 | 333 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
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 | 363 | /* Put this on the chain of all buffers including killed ones. */ |
eab3844f | 364 | b->header.next.buffer = all_buffers; |
1ab256cb RM |
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)); | |
9397e56f MR |
389 | /* And run buffer-list-update-hook. */ |
390 | if (!NILP (Vrun_hooks)) | |
391 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 392 | |
2f064abf | 393 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
394 | can lead to infinite regress until you run out of stack. rms |
395 | says that's not worth protecting against. */ | |
48265e61 | 396 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
397 | /* buffer is on buffer-alist, so no gcpro. */ |
398 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 399 | |
cd265ca6 | 400 | return buffer; |
336cd056 RS |
401 | } |
402 | ||
7e9d5818 | 403 | |
04e4cb3a GM |
404 | /* Return a list of overlays which is a copy of the overlay list |
405 | LIST, but for buffer B. */ | |
406 | ||
2410d73a | 407 | static struct Lisp_Overlay * |
d3da34e0 | 408 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 409 | { |
2410d73a SM |
410 | Lisp_Object buffer; |
411 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
412 | |
413 | XSETBUFFER (buffer, b); | |
414 | ||
2410d73a | 415 | for (; list; list = list->next) |
04e4cb3a GM |
416 | { |
417 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 418 | EMACS_INT charpos; |
04e4cb3a | 419 | |
2410d73a | 420 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
421 | charpos = marker_position (OVERLAY_START (old_overlay)); |
422 | start = Fmake_marker (); | |
db3a49a6 | 423 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
424 | XMARKER (start)->insertion_type |
425 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
426 | ||
427 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
428 | end = Fmake_marker (); | |
db3a49a6 | 429 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
430 | XMARKER (end)->insertion_type |
431 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
432 | ||
433 | overlay = allocate_misc (); | |
434 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
435 | OVERLAY_START (overlay) = start; | |
436 | OVERLAY_END (overlay) = end; | |
437 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 438 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 439 | |
2410d73a SM |
440 | if (tail) |
441 | tail = tail->next = XOVERLAY (overlay); | |
442 | else | |
443 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
444 | } |
445 | ||
2410d73a | 446 | return result; |
04e4cb3a | 447 | } |
177c0ea7 | 448 | |
04e4cb3a | 449 | |
7e9d5818 GM |
450 | /* Clone per-buffer values of buffer FROM. |
451 | ||
452 | Buffer TO gets the same per-buffer values as FROM, with the | |
453 | following exceptions: (1) TO's name is left untouched, (2) markers | |
454 | are copied and made to refer to TO, and (3) overlay lists are | |
455 | copied. */ | |
456 | ||
457 | static void | |
d3da34e0 | 458 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 459 | { |
54622f33 | 460 | Lisp_Object to_buffer; |
7e9d5818 GM |
461 | int offset; |
462 | ||
463 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 464 | |
3ee24aec SM |
465 | /* buffer-local Lisp variables start at `undo_list', |
466 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 467 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
468 | offset < sizeof *to; |
469 | offset += sizeof (Lisp_Object)) | |
470 | { | |
471 | Lisp_Object obj; | |
472 | ||
4b7cdc0e SM |
473 | /* Don't touch the `name' which should be unique for every buffer. */ |
474 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
475 | continue; | |
476 | ||
7e9d5818 | 477 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 478 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
479 | { |
480 | struct Lisp_Marker *m = XMARKER (obj); | |
481 | obj = Fmake_marker (); | |
482 | XMARKER (obj)->insertion_type = m->insertion_type; | |
483 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
484 | } | |
485 | ||
486 | PER_BUFFER_VALUE (to, offset) = obj; | |
487 | } | |
488 | ||
72af86bd | 489 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 490 | |
04e4cb3a GM |
491 | to->overlays_before = copy_overlays (to, from->overlays_before); |
492 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 493 | |
e1688f54 RS |
494 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
495 | and install that in TO. */ | |
4b4deea2 | 496 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
497 | } |
498 | ||
cffc6f3b CY |
499 | |
500 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
501 | current, update these markers. */ | |
502 | ||
503 | static void | |
504 | record_buffer_markers (struct buffer *b) | |
505 | { | |
506 | if (! NILP (BVAR (b, pt_marker))) | |
507 | { | |
508 | Lisp_Object buffer; | |
509 | ||
510 | eassert (!NILP (BVAR (b, begv_marker))); | |
511 | eassert (!NILP (BVAR (b, zv_marker))); | |
512 | ||
513 | XSETBUFFER (buffer, b); | |
514 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
515 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
516 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
517 | } | |
518 | } | |
519 | ||
520 | ||
521 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
522 | current, fetch these values into B->begv etc. */ | |
523 | ||
524 | static void | |
525 | fetch_buffer_markers (struct buffer *b) | |
526 | { | |
527 | if (! NILP (BVAR (b, pt_marker))) | |
528 | { | |
529 | Lisp_Object m; | |
530 | ||
531 | eassert (!NILP (BVAR (b, begv_marker))); | |
532 | eassert (!NILP (BVAR (b, zv_marker))); | |
533 | ||
534 | m = BVAR (b, pt_marker); | |
535 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
536 | ||
537 | m = BVAR (b, begv_marker); | |
538 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
539 | ||
540 | m = BVAR (b, zv_marker); | |
541 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
542 | } | |
543 | } | |
544 | ||
545 | ||
7e9d5818 GM |
546 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
547 | 2, 3, | |
193c3837 | 548 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 549 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 550 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
551 | NAME should be a string which is not the name of an existing buffer. |
552 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
553 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 554 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 555 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 556 | { |
6b61353c | 557 | Lisp_Object buf, tem; |
7e9d5818 | 558 | struct buffer *b; |
336cd056 | 559 | |
6b61353c | 560 | CHECK_STRING (name); |
336cd056 RS |
561 | buf = Fget_buffer (name); |
562 | if (!NILP (buf)) | |
d5db4077 | 563 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 564 | |
6b61353c | 565 | tem = base_buffer; |
336cd056 RS |
566 | base_buffer = Fget_buffer (base_buffer); |
567 | if (NILP (base_buffer)) | |
6b61353c | 568 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 569 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 570 | error ("Base buffer has been killed"); |
336cd056 | 571 | |
d5db4077 | 572 | if (SCHARS (name) == 0) |
336cd056 RS |
573 | error ("Empty string for buffer name is not allowed"); |
574 | ||
cc648cef | 575 | b = allocate_buffer (); |
336cd056 | 576 | |
67ee9f6e SM |
577 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
578 | ? XBUFFER (base_buffer)->base_buffer | |
579 | : XBUFFER (base_buffer)); | |
336cd056 RS |
580 | |
581 | /* Use the base buffer's text object. */ | |
582 | b->text = b->base_buffer->text; | |
583 | ||
cffc6f3b CY |
584 | b->pt = b->base_buffer->pt; |
585 | b->begv = b->base_buffer->begv; | |
586 | b->zv = b->base_buffer->zv; | |
587 | b->pt_byte = b->base_buffer->pt_byte; | |
588 | b->begv_byte = b->base_buffer->begv_byte; | |
589 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
590 | |
591 | b->newline_cache = 0; | |
592 | b->width_run_cache = 0; | |
4b4deea2 | 593 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
594 | |
595 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 596 | b->header.next.buffer = all_buffers; |
336cd056 RS |
597 | all_buffers = b; |
598 | ||
599 | name = Fcopy_sequence (name); | |
ab77f05c | 600 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 601 | BVAR (b, name) = name; |
336cd056 RS |
602 | |
603 | reset_buffer (b); | |
13de9290 | 604 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
605 | |
606 | /* Put this in the alist of all live buffers. */ | |
607 | XSETBUFFER (buf, b); | |
608 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
609 | ||
4b4deea2 TT |
610 | BVAR (b, mark) = Fmake_marker (); |
611 | BVAR (b, name) = name; | |
336cd056 | 612 | |
abc9d959 | 613 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 614 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 615 | |
336cd056 | 616 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 617 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 618 | { |
2aa46d6c CY |
619 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
620 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 621 | |
4b4deea2 TT |
622 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
623 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
cffc6f3b CY |
624 | b->base_buffer->pt, |
625 | b->base_buffer->pt_byte); | |
626 | ||
4b4deea2 TT |
627 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
628 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
cffc6f3b CY |
629 | b->base_buffer->begv, |
630 | b->base_buffer->begv_byte); | |
631 | ||
4b4deea2 TT |
632 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
633 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
cffc6f3b CY |
634 | b->base_buffer->zv, |
635 | b->base_buffer->zv_byte); | |
4b4deea2 | 636 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
637 | } |
638 | ||
7e9d5818 GM |
639 | if (NILP (clone)) |
640 | { | |
641 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 | 642 | BVAR (b, pt_marker) = Fmake_marker (); |
cffc6f3b | 643 | set_marker_both (BVAR (b, pt_marker), buf, b->pt, b->pt_byte); |
4b4deea2 | 644 | BVAR (b, begv_marker) = Fmake_marker (); |
cffc6f3b | 645 | set_marker_both (BVAR (b, begv_marker), buf, b->begv, b->begv_byte); |
4b4deea2 | 646 | BVAR (b, zv_marker) = Fmake_marker (); |
cffc6f3b | 647 | set_marker_both (BVAR (b, zv_marker), buf, b->zv, b->zv_byte); |
4b4deea2 | 648 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
649 | } |
650 | else | |
7fa57e45 RS |
651 | { |
652 | struct buffer *old_b = current_buffer; | |
653 | ||
654 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
655 | BVAR (b, filename) = Qnil; |
656 | BVAR (b, file_truename) = Qnil; | |
657 | BVAR (b, display_count) = make_number (0); | |
658 | BVAR (b, backed_up) = Qnil; | |
659 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
660 | set_buffer_internal_1 (b); |
661 | Fset (intern ("buffer-save-without-query"), Qnil); | |
662 | Fset (intern ("buffer-file-number"), Qnil); | |
663 | Fset (intern ("buffer-stale-function"), Qnil); | |
664 | set_buffer_internal_1 (old_b); | |
665 | } | |
336cd056 | 666 | |
9397e56f MR |
667 | /* Run buffer-list-update-hook. */ |
668 | if (!NILP (Vrun_hooks)) | |
669 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
670 | ||
a9ee7a59 | 671 | return buf; |
1ab256cb RM |
672 | } |
673 | ||
d4f5719a | 674 | void |
d3da34e0 | 675 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
676 | { |
677 | Lisp_Object overlay; | |
678 | ||
679 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
680 | have to empty the list, otherwise we end up with overlays that | |
681 | think they belong to this buffer while the buffer doesn't know about | |
682 | them any more. */ | |
683 | while (b->overlays_before) | |
684 | { | |
685 | XSETMISC (overlay, b->overlays_before); | |
686 | Fdelete_overlay (overlay); | |
687 | } | |
688 | while (b->overlays_after) | |
689 | { | |
690 | XSETMISC (overlay, b->overlays_after); | |
691 | Fdelete_overlay (overlay); | |
692 | } | |
693 | eassert (b->overlays_before == NULL); | |
694 | eassert (b->overlays_after == NULL); | |
695 | } | |
696 | ||
bcd40520 | 697 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 698 | and local variables. |
d4f5719a SM |
699 | If called on an already-initialized buffer, the list of overlays |
700 | should be deleted before calling this function, otherwise we end up | |
701 | with overlays that claim to belong to the buffer but the buffer | |
702 | claims it doesn't belong to it. */ | |
1ab256cb RM |
703 | |
704 | void | |
d3da34e0 | 705 | reset_buffer (register struct buffer *b) |
1ab256cb | 706 | { |
4b4deea2 TT |
707 | BVAR (b, filename) = Qnil; |
708 | BVAR (b, file_truename) = Qnil; | |
709 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 710 | b->modtime = 0; |
58b963f7 | 711 | b->modtime_size = -1; |
4b4deea2 | 712 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 713 | b->last_window_start = 1; |
8b264726 | 714 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
715 | b->clip_changed = 0; |
716 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 717 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 718 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 719 | b->auto_save_failure_time = -1; |
4b4deea2 TT |
720 | BVAR (b, auto_save_file_name) = Qnil; |
721 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
722 | b->overlays_before = NULL; |
723 | b->overlays_after = NULL; | |
c2d5b10f | 724 | b->overlay_center = BEG; |
4b4deea2 TT |
725 | BVAR (b, mark_active) = Qnil; |
726 | BVAR (b, point_before_scroll) = Qnil; | |
727 | BVAR (b, file_format) = Qnil; | |
728 | BVAR (b, auto_save_file_format) = Qt; | |
729 | BVAR (b, last_selected_window) = Qnil; | |
730 | XSETINT (BVAR (b, display_count), 0); | |
731 | BVAR (b, display_time) = Qnil; | |
732 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
733 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
734 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
735 | |
736 | b->display_error_modiff = 0; | |
1ab256cb RM |
737 | } |
738 | ||
bcd40520 RS |
739 | /* Reset buffer B's local variables info. |
740 | Don't use this on a buffer that has already been in use; | |
741 | it does not treat permanent locals consistently. | |
13de9290 RS |
742 | Instead, use Fkill_all_local_variables. |
743 | ||
3709505e | 744 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
745 | buffer-local variables. If PERMANENT_TOO is 0, |
746 | we preserve those. */ | |
bcd40520 | 747 | |
13de9290 | 748 | static void |
d3da34e0 | 749 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
750 | { |
751 | register int offset; | |
7c02e886 | 752 | int i; |
1ab256cb RM |
753 | |
754 | /* Reset the major mode to Fundamental, together with all the | |
755 | things that depend on the major mode. | |
756 | default-major-mode is handled at a higher level. | |
757 | We ignore it here. */ | |
4b4deea2 TT |
758 | BVAR (b, major_mode) = Qfundamental_mode; |
759 | BVAR (b, keymap) = Qnil; | |
760 | BVAR (b, mode_name) = QSFundamental; | |
761 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
762 | |
763 | /* If the standard case table has been altered and invalidated, | |
764 | fix up its insides first. */ | |
765 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
766 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
767 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
768 | Fset_standard_case_table (Vascii_downcase_table); | |
769 | ||
4b4deea2 TT |
770 | BVAR (b, downcase_table) = Vascii_downcase_table; |
771 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
772 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
773 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
774 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 775 | |
13de9290 | 776 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 777 | if (permanent_too) |
4b4deea2 | 778 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
779 | else |
780 | { | |
2f7a359d | 781 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 782 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 783 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
784 | { |
785 | /* If permanent-local, keep it. */ | |
786 | last = tmp; | |
787 | if (EQ (prop, Qpermanent_local_hook)) | |
788 | { | |
789 | /* This is a partially permanent hook variable. | |
790 | Preserve only the elements that want to be preserved. */ | |
791 | Lisp_Object list, newlist; | |
792 | list = XCDR (XCAR (tmp)); | |
793 | if (!CONSP (list)) | |
794 | newlist = list; | |
795 | else | |
796 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
797 | { | |
798 | Lisp_Object elt = XCAR (list); | |
799 | /* Preserve element ELT if it's t, | |
800 | if it is a function with a `permanent-local-hook' property, | |
801 | or if it's not a symbol. */ | |
802 | if (! SYMBOLP (elt) | |
803 | || EQ (elt, Qt) | |
804 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
805 | newlist = Fcons (elt, newlist); | |
806 | } | |
807 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
808 | } | |
809 | } | |
810 | /* Delete this local variable. */ | |
3709505e | 811 | else if (NILP (last)) |
4b4deea2 | 812 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
813 | else |
814 | XSETCDR (last, XCDR (tmp)); | |
815 | } | |
816 | ||
7313acd0 | 817 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 818 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 819 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
820 | |
821 | /* For each slot that has a default value, | |
822 | copy that into the slot. */ | |
823 | ||
3ee24aec SM |
824 | /* buffer-local Lisp variables start at `undo_list', |
825 | tho only the ones from `name' on are GC'd normally. */ | |
826 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
827 | offset < sizeof *b; |
828 | offset += sizeof (Lisp_Object)) | |
aab80822 | 829 | { |
7313acd0 | 830 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
831 | if ((idx > 0 |
832 | && (permanent_too | |
ce5b453a | 833 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 834 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 835 | } |
1ab256cb RM |
836 | } |
837 | ||
01050cb5 RM |
838 | /* We split this away from generate-new-buffer, because rename-buffer |
839 | and set-visited-file-name ought to be able to use this to really | |
840 | rename the buffer properly. */ | |
841 | ||
a7ca3326 | 842 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 843 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 844 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
845 | If there is no live buffer named NAME, then return NAME. |
846 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 847 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
848 | Optional second argument IGNORE specifies a name that is okay to use (if |
849 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 850 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
851 | { |
852 | register Lisp_Object gentemp, tem; | |
666398f3 PE |
853 | EMACS_INT count; |
854 | char number[INT_BUFSIZE_BOUND (EMACS_INT) + sizeof "<>"]; | |
1ab256cb | 855 | |
b7826503 | 856 | CHECK_STRING (name); |
1ab256cb | 857 | |
6b61353c KH |
858 | tem = Fstring_equal (name, ignore); |
859 | if (!NILP (tem)) | |
860 | return name; | |
1ab256cb | 861 | tem = Fget_buffer (name); |
265a9e55 | 862 | if (NILP (tem)) |
01050cb5 | 863 | return name; |
1ab256cb RM |
864 | |
865 | count = 1; | |
866 | while (1) | |
867 | { | |
666398f3 | 868 | sprintf (number, "<%"pI"d>", ++count); |
1ab256cb | 869 | gentemp = concat2 (name, build_string (number)); |
638e4fc3 | 870 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
871 | if (!NILP (tem)) |
872 | return gentemp; | |
1ab256cb | 873 | tem = Fget_buffer (gentemp); |
265a9e55 | 874 | if (NILP (tem)) |
01050cb5 | 875 | return gentemp; |
1ab256cb RM |
876 | } |
877 | } | |
878 | ||
879 | \f | |
a7ca3326 | 880 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 881 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
882 | BUFFER defaults to the current buffer. |
883 | Return nil if BUFFER has been killed. */) | |
5842a27b | 884 | (register Lisp_Object buffer) |
1ab256cb | 885 | { |
265a9e55 | 886 | if (NILP (buffer)) |
4b4deea2 | 887 | return BVAR (current_buffer, name); |
b7826503 | 888 | CHECK_BUFFER (buffer); |
4b4deea2 | 889 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
890 | } |
891 | ||
a7ca3326 | 892 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
893 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
894 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 895 | (register Lisp_Object buffer) |
1ab256cb | 896 | { |
265a9e55 | 897 | if (NILP (buffer)) |
4b4deea2 | 898 | return BVAR (current_buffer, filename); |
b7826503 | 899 | CHECK_BUFFER (buffer); |
4b4deea2 | 900 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
901 | } |
902 | ||
336cd056 RS |
903 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
904 | 0, 1, 0, | |
7ee72033 | 905 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
906 | If BUFFER is not indirect, return nil. |
907 | BUFFER defaults to the current buffer. */) | |
5842a27b | 908 | (register Lisp_Object buffer) |
336cd056 RS |
909 | { |
910 | struct buffer *base; | |
911 | Lisp_Object base_buffer; | |
912 | ||
913 | if (NILP (buffer)) | |
914 | base = current_buffer->base_buffer; | |
915 | else | |
916 | { | |
b7826503 | 917 | CHECK_BUFFER (buffer); |
336cd056 RS |
918 | base = XBUFFER (buffer)->base_buffer; |
919 | } | |
920 | ||
921 | if (! base) | |
922 | return Qnil; | |
923 | XSETBUFFER (base_buffer, base); | |
924 | return base_buffer; | |
925 | } | |
926 | ||
a7ca3326 | 927 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 928 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
929 | doc: /* Return the value of VARIABLE in BUFFER. |
930 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 931 | is the default binding of the variable. */) |
5842a27b | 932 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
933 | { |
934 | register struct buffer *buf; | |
935 | register Lisp_Object result; | |
ad97b375 | 936 | struct Lisp_Symbol *sym; |
79aa712d | 937 | |
5e2ad10b | 938 | CHECK_SYMBOL (variable); |
ae69175b | 939 | CHECK_BUFFER (buffer); |
79aa712d | 940 | buf = XBUFFER (buffer); |
ce5b453a | 941 | sym = XSYMBOL (variable); |
79aa712d | 942 | |
ce5b453a SM |
943 | start: |
944 | switch (sym->redirect) | |
f0bac7de | 945 | { |
ce5b453a SM |
946 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
947 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
948 | case SYMBOL_LOCALIZED: | |
949 | { /* Look in local_var_alist. */ | |
950 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
951 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 952 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
953 | if (!NILP (result)) |
954 | { | |
955 | if (blv->fwd) | |
956 | { /* What binding is loaded right now? */ | |
957 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 958 | |
ce5b453a SM |
959 | /* The value of the currently loaded binding is not |
960 | stored in it, but rather in the realvalue slot. | |
961 | Store that value into the binding it belongs to | |
962 | in case that is the one we are about to use. */ | |
f0bac7de | 963 | |
ce5b453a SM |
964 | XSETCDR (current_alist_element, |
965 | do_symval_forwarding (blv->fwd)); | |
966 | } | |
967 | /* Now get the (perhaps updated) value out of the binding. */ | |
968 | result = XCDR (result); | |
969 | } | |
970 | else | |
971 | result = Fdefault_value (variable); | |
972 | break; | |
973 | } | |
974 | case SYMBOL_FORWARDED: | |
975 | { | |
976 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
977 | if (BUFFER_OBJFWDP (fwd)) | |
978 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
979 | else | |
980 | result = Fdefault_value (variable); | |
981 | break; | |
982 | } | |
983 | default: abort (); | |
f0bac7de | 984 | } |
79aa712d | 985 | |
4c4dc0b0 KS |
986 | if (!EQ (result, Qunbound)) |
987 | return result; | |
79aa712d | 988 | |
4c4dc0b0 | 989 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
990 | } |
991 | ||
e1688f54 | 992 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 993 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
994 | in special slots in the buffer object. */ |
995 | ||
996 | static Lisp_Object | |
d3da34e0 | 997 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
998 | { |
999 | Lisp_Object result = Qnil; | |
1000 | register Lisp_Object tail; | |
4b4deea2 | 1001 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1002 | { |
1003 | Lisp_Object val, elt; | |
1004 | ||
1005 | elt = XCAR (tail); | |
1006 | ||
1007 | /* Reference each variable in the alist in buf. | |
1008 | If inquiring about the current buffer, this gets the current values, | |
1009 | so store them into the alist so the alist is up to date. | |
1010 | If inquiring about some other buffer, this swaps out any values | |
1011 | for that buffer, making the alist up to date automatically. */ | |
1012 | val = find_symbol_value (XCAR (elt)); | |
1013 | /* Use the current buffer value only if buf is the current buffer. */ | |
1014 | if (buf != current_buffer) | |
1015 | val = XCDR (elt); | |
1016 | ||
ce5b453a | 1017 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
1018 | } |
1019 | ||
1020 | return result; | |
1021 | } | |
1022 | ||
1ab256cb | 1023 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1024 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1025 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1026 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1027 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1028 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1029 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1030 | (register Lisp_Object buffer) |
1ab256cb RM |
1031 | { |
1032 | register struct buffer *buf; | |
553defa4 | 1033 | register Lisp_Object result; |
1ab256cb | 1034 | |
265a9e55 | 1035 | if (NILP (buffer)) |
1ab256cb RM |
1036 | buf = current_buffer; |
1037 | else | |
1038 | { | |
b7826503 | 1039 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1040 | buf = XBUFFER (buffer); |
1041 | } | |
1042 | ||
e1688f54 | 1043 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1044 | |
1ab256cb RM |
1045 | /* Add on all the variables stored in special slots. */ |
1046 | { | |
7c02e886 | 1047 | int offset, idx; |
1ab256cb | 1048 | |
3ee24aec SM |
1049 | /* buffer-local Lisp variables start at `undo_list', |
1050 | tho only the ones from `name' on are GC'd normally. */ | |
1051 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1052 | offset < sizeof (struct buffer); |
7c02e886 GM |
1053 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1054 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1055 | { |
7313acd0 GM |
1056 | idx = PER_BUFFER_IDX (offset); |
1057 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1058 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1059 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1060 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1061 | result); |
1ab256cb RM |
1062 | } |
1063 | } | |
553defa4 RS |
1064 | |
1065 | return result; | |
1ab256cb | 1066 | } |
1ab256cb | 1067 | \f |
a7ca3326 | 1068 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1069 | 0, 1, 0, |
7ee72033 MB |
1070 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1071 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1072 | (register Lisp_Object buffer) |
1ab256cb RM |
1073 | { |
1074 | register struct buffer *buf; | |
265a9e55 | 1075 | if (NILP (buffer)) |
1ab256cb RM |
1076 | buf = current_buffer; |
1077 | else | |
1078 | { | |
b7826503 | 1079 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1080 | buf = XBUFFER (buffer); |
1081 | } | |
1082 | ||
336cd056 | 1083 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1084 | } |
1085 | ||
a7ca3326 | 1086 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1087 | 1, 1, 0, |
7ee72033 MB |
1088 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1089 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1090 | (register Lisp_Object flag) |
1ab256cb RM |
1091 | { |
1092 | register int already; | |
1093 | register Lisp_Object fn; | |
8ec01c70 | 1094 | Lisp_Object buffer, window; |
1ab256cb RM |
1095 | |
1096 | #ifdef CLASH_DETECTION | |
1097 | /* If buffer becoming modified, lock the file. | |
1098 | If buffer becoming unmodified, unlock the file. */ | |
1099 | ||
4b4deea2 | 1100 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1101 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1102 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1103 | { |
336cd056 | 1104 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1105 | if (!already && !NILP (flag)) |
1ab256cb | 1106 | lock_file (fn); |
265a9e55 | 1107 | else if (already && NILP (flag)) |
1ab256cb RM |
1108 | unlock_file (fn); |
1109 | } | |
1110 | #endif /* CLASH_DETECTION */ | |
1111 | ||
0b5397c2 SM |
1112 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1113 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1114 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1115 | modify SAVE_MODIFF to affect one, we may affect the other | |
1116 | as well. | |
1117 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1118 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1119 | recent-auto-save-p from t to nil. | |
1120 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1121 | we risk changing recent-auto-save-p from nil to t. */ | |
1122 | SAVE_MODIFF = (NILP (flag) | |
1123 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1124 | ? MODIFF | |
1125 | /* Let's try to preserve recent-auto-save-p. */ | |
1126 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1127 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1128 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1129 | or increase MODIFF. */ | |
1130 | : MODIFF++); | |
177c0ea7 | 1131 | |
8ec01c70 GM |
1132 | /* Set update_mode_lines only if buffer is displayed in some window. |
1133 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1134 | state by recording/restoring the state around blocks of code. | |
1135 | Setting update_mode_lines makes redisplay consider all windows | |
1136 | (on all frames). Stealth fontification of buffers not displayed | |
1137 | would incur additional redisplay costs if we'd set | |
1138 | update_modes_lines unconditionally. | |
1139 | ||
1140 | Ideally, I think there should be another mechanism for fontifying | |
1141 | buffers without "modifying" buffers, or redisplay should be | |
1142 | smarter about updating the `*' in mode lines. --gerd */ | |
1143 | XSETBUFFER (buffer, current_buffer); | |
1144 | window = Fget_buffer_window (buffer, Qt); | |
1145 | if (WINDOWP (window)) | |
d57b83b3 GM |
1146 | { |
1147 | ++update_mode_lines; | |
1148 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1149 | } | |
177c0ea7 | 1150 | |
1ab256cb RM |
1151 | return flag; |
1152 | } | |
1153 | ||
a8c21b48 GM |
1154 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1155 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1156 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1157 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1158 | state of the current buffer. Use with care. */) |
5842a27b | 1159 | (Lisp_Object flag) |
a8c21b48 GM |
1160 | { |
1161 | #ifdef CLASH_DETECTION | |
1162 | Lisp_Object fn; | |
177c0ea7 | 1163 | |
a8c21b48 GM |
1164 | /* If buffer becoming modified, lock the file. |
1165 | If buffer becoming unmodified, unlock the file. */ | |
1166 | ||
4b4deea2 | 1167 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1168 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1169 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1170 | { |
1171 | int already = SAVE_MODIFF < MODIFF; | |
1172 | if (!already && !NILP (flag)) | |
1173 | lock_file (fn); | |
1174 | else if (already && NILP (flag)) | |
1175 | unlock_file (fn); | |
1176 | } | |
1177 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1178 | |
a8c21b48 GM |
1179 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1180 | return flag; | |
1181 | } | |
1182 | ||
1ab256cb | 1183 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1184 | 0, 1, 0, |
7ee72033 | 1185 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1186 | Each buffer has a tick counter which is incremented each time the |
1187 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1188 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1189 | (register Lisp_Object buffer) |
1ab256cb RM |
1190 | { |
1191 | register struct buffer *buf; | |
265a9e55 | 1192 | if (NILP (buffer)) |
1ab256cb RM |
1193 | buf = current_buffer; |
1194 | else | |
1195 | { | |
b7826503 | 1196 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1197 | buf = XBUFFER (buffer); |
1198 | } | |
1199 | ||
1200 | return make_number (BUF_MODIFF (buf)); | |
1201 | } | |
3e145152 CY |
1202 | |
1203 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1204 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1205 | doc: /* Return BUFFER's character-change tick counter. | |
1206 | Each buffer has a character-change tick counter, which is set to the | |
1207 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1208 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1209 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1210 | you can tell whether a character change occurred in that buffer in |
1211 | between these calls. No argument or nil as argument means use current | |
1212 | buffer as BUFFER. */) | |
5842a27b | 1213 | (register Lisp_Object buffer) |
3e145152 CY |
1214 | { |
1215 | register struct buffer *buf; | |
1216 | if (NILP (buffer)) | |
1217 | buf = current_buffer; | |
1218 | else | |
1219 | { | |
1220 | CHECK_BUFFER (buffer); | |
1221 | buf = XBUFFER (buffer); | |
1222 | } | |
1223 | ||
1224 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1225 | } | |
1ab256cb | 1226 | \f |
01050cb5 | 1227 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1228 | "(list (read-string \"Rename buffer (to new name): \" \ |
1229 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1230 | current-prefix-arg)", | |
7ee72033 | 1231 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1232 | If second arg UNIQUE is nil or omitted, it is an error if a |
1233 | buffer named NEWNAME already exists. | |
1234 | If UNIQUE is non-nil, come up with a new name using | |
1235 | `generate-new-buffer-name'. | |
1236 | Interactively, you can set UNIQUE with a prefix argument. | |
1237 | We return the name we actually gave the buffer. | |
7ee72033 | 1238 | This does not change the name of the visited file (if any). */) |
5842a27b | 1239 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1240 | { |
1241 | register Lisp_Object tem, buf; | |
1242 | ||
b7826503 | 1243 | CHECK_STRING (newname); |
d59698c4 | 1244 | |
d5db4077 | 1245 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1246 | error ("Empty string is invalid as a buffer name"); |
1247 | ||
489c043a | 1248 | tem = Fget_buffer (newname); |
265a9e55 | 1249 | if (!NILP (tem)) |
01050cb5 | 1250 | { |
8801a864 KR |
1251 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1252 | rename the buffer automatically so you can create another | |
1253 | with the original name. It makes UNIQUE equivalent to | |
1254 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1255 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1256 | return BVAR (current_buffer, name); |
3bd779aa | 1257 | if (!NILP (unique)) |
4b4deea2 | 1258 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1259 | else |
d5db4077 | 1260 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1261 | } |
1ab256cb | 1262 | |
4b4deea2 | 1263 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1264 | |
1265 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1266 | any windows displaying current_buffer will stay unchanged. */ | |
1267 | update_mode_lines++; | |
1268 | ||
67180c6a | 1269 | XSETBUFFER (buf, current_buffer); |
489c043a | 1270 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1271 | if (NILP (BVAR (current_buffer, filename)) |
1272 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1273 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1274 | |
1275 | /* Run buffer-list-update-hook. */ | |
1276 | if (!NILP (Vrun_hooks)) | |
1277 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1278 | ||
fb5eba9c | 1279 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1280 | return BVAR (current_buffer, name); |
1ab256cb RM |
1281 | } |
1282 | ||
a7ca3326 | 1283 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1284 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1285 | Buffers not visible in windows are preferred to visible buffers, unless |
1286 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1287 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1288 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1289 | frame's buffer list. | |
1290 | ||
1291 | The buffer is found by scanning the selected or specified frame's buffer | |
1292 | list first, followed by the list of all buffers. If no other buffer | |
1293 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1294 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1295 | { |
9397e56f MR |
1296 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1297 | Lisp_Object tail, buf, pred; | |
1298 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1299 | |
773fbdb9 | 1300 | if (NILP (frame)) |
9ba9623d | 1301 | frame = selected_frame; |
773fbdb9 | 1302 | |
d234d13e JL |
1303 | CHECK_FRAME (frame); |
1304 | ||
773fbdb9 | 1305 | pred = frame_buffer_predicate (frame); |
9397e56f MR |
1306 | /* Consider buffers that have been seen in the frame first. */ |
1307 | tail = XFRAME (frame)->buffer_list; | |
1308 | for (; CONSP (tail); tail = XCDR (tail)) | |
7962a441 | 1309 | { |
9397e56f MR |
1310 | buf = XCAR (tail); |
1311 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1312 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1313 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1314 | /* If the frame has a buffer_predicate, disregard buffers that | |
1315 | don't fit the predicate. */ | |
1316 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1317 | { | |
1318 | if (!NILP (visible_ok) | |
1319 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1320 | return buf; | |
1321 | else if (NILP (notsogood)) | |
1322 | notsogood = buf; | |
1323 | } | |
7962a441 | 1324 | } |
7962a441 | 1325 | |
9397e56f MR |
1326 | /* Consider alist of all buffers next. */ |
1327 | tail = Vbuffer_alist; | |
6d70a280 | 1328 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1329 | { |
6d70a280 | 1330 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1331 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1332 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1333 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1334 | /* If the frame has a buffer_predicate, disregard buffers that | |
1335 | don't fit the predicate. */ | |
1336 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1337 | { | |
1338 | if (!NILP (visible_ok) | |
1339 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1340 | return buf; | |
1341 | else if (NILP (notsogood)) | |
1342 | notsogood = buf; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | if (!NILP (notsogood)) | |
1347 | return notsogood; | |
1348 | else | |
1349 | { | |
1350 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1351 | if (NILP (buf)) |
04ae1b48 | 1352 | { |
9397e56f MR |
1353 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1354 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1355 | } |
9397e56f MR |
1356 | return buf; |
1357 | } | |
1358 | } | |
04ae1b48 | 1359 | |
9397e56f MR |
1360 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1361 | pay attention to any frame-local buffer lists, doesn't care about | |
1362 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1363 | ||
1364 | Lisp_Object | |
1365 | other_buffer_safely (Lisp_Object buffer) | |
1366 | { | |
1367 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1368 | Lisp_Object tail, buf; | |
1369 | ||
1370 | tail = Vbuffer_alist; | |
1371 | for (; CONSP (tail); tail = XCDR (tail)) | |
1372 | { | |
1373 | buf = Fcdr (XCAR (tail)); | |
1374 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1375 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1376 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1377 | return buf; |
1ab256cb | 1378 | } |
9397e56f | 1379 | |
dba1a30a GM |
1380 | buf = Fget_buffer (build_string ("*scratch*")); |
1381 | if (NILP (buf)) | |
1382 | { | |
1383 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1384 | Fset_buffer_major_mode (buf); | |
1385 | } | |
9397e56f | 1386 | |
89132f25 | 1387 | return buf; |
1ab256cb RM |
1388 | } |
1389 | \f | |
a7ca3326 | 1390 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1391 | 0, 1, "", |
7ee72033 MB |
1392 | doc: /* Start keeping undo information for buffer BUFFER. |
1393 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1394 | (register Lisp_Object buffer) |
1ab256cb | 1395 | { |
ffd56f97 | 1396 | Lisp_Object real_buffer; |
1ab256cb | 1397 | |
ffd56f97 | 1398 | if (NILP (buffer)) |
67180c6a | 1399 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1400 | else |
1401 | { | |
ffd56f97 JB |
1402 | real_buffer = Fget_buffer (buffer); |
1403 | if (NILP (real_buffer)) | |
1404 | nsberror (buffer); | |
1ab256cb RM |
1405 | } |
1406 | ||
4b4deea2 TT |
1407 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1408 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1409 | |
1410 | return Qnil; | |
1411 | } | |
1412 | ||
1413 | /* | |
00b3c7ac | 1414 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1415 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1416 | The buffer being killed will be current while the hook is running.\n\ | |
1417 | See `kill-buffer'." | |
1418 | */ | |
a7ca3326 | 1419 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
c8804c4f MR |
1420 | doc: /* Kill buffer BUFFER-OR-NAME. |
1421 | The argument may be a buffer or the name of an existing buffer. | |
1422 | Argument nil or omitted means kill the current buffer. Return t if the | |
1423 | buffer is actually killed, nil otherwise. | |
1424 | ||
1425 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1426 | windows currently displaying the buffer to be killed. The functions in | |
1427 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1428 | the current buffer. If any of them returns nil, the buffer is not | |
1429 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1430 | actually killed. The buffer being killed will be current while the hook | |
1431 | is running. | |
018ba359 PJ |
1432 | |
1433 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1434 | with SIGHUP. */) |
5842a27b | 1435 | (Lisp_Object buffer_or_name) |
1ab256cb | 1436 | { |
c8804c4f | 1437 | Lisp_Object buffer; |
1ab256cb RM |
1438 | register struct buffer *b; |
1439 | register Lisp_Object tem; | |
1440 | register struct Lisp_Marker *m; | |
6af718a4 | 1441 | struct gcpro gcpro1; |
1ab256cb | 1442 | |
c8804c4f MR |
1443 | if (NILP (buffer_or_name)) |
1444 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1445 | else |
c8804c4f MR |
1446 | buffer = Fget_buffer (buffer_or_name); |
1447 | if (NILP (buffer)) | |
1448 | nsberror (buffer_or_name); | |
1ab256cb | 1449 | |
c8804c4f | 1450 | b = XBUFFER (buffer); |
1ab256cb | 1451 | |
4a4a9db5 | 1452 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1453 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1454 | return Qnil; |
1455 | ||
1ab256cb | 1456 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1457 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1458 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1459 | { |
c8804c4f | 1460 | GCPRO1 (buffer); |
5c4930b0 | 1461 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1462 | BVAR (b, name), make_number (0))); |
1ab256cb | 1463 | UNGCPRO; |
265a9e55 | 1464 | if (NILP (tem)) |
1ab256cb RM |
1465 | return Qnil; |
1466 | } | |
1467 | ||
dcdffbf6 | 1468 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1469 | { |
aed13378 | 1470 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1471 | Lisp_Object arglist[1]; |
1ab256cb RM |
1472 | |
1473 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1474 | set_buffer_internal (b); | |
dcdffbf6 RS |
1475 | |
1476 | /* First run the query functions; if any query is answered no, | |
1477 | don't kill the buffer. */ | |
5b20caf0 | 1478 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1479 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1480 | if (NILP (tem)) | |
5b20caf0 | 1481 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1482 | |
1483 | /* Then run the hooks. */ | |
f1597a3a | 1484 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1485 | unbind_to (count, Qnil); |
1486 | } | |
1487 | ||
1488 | /* We have no more questions to ask. Verify that it is valid | |
1489 | to kill the buffer. This must be done after the questions | |
1490 | since anything can happen within do_yes_or_no_p. */ | |
1491 | ||
1492 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1493 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1494 | return Qnil; |
1495 | ||
4b4deea2 | 1496 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1497 | return Qnil; |
1498 | ||
336cd056 RS |
1499 | /* When we kill a base buffer, kill all its indirect buffers. |
1500 | We do it at this stage so nothing terrible happens if they | |
1501 | ask questions or their hooks get errors. */ | |
1502 | if (! b->base_buffer) | |
1503 | { | |
1504 | struct buffer *other; | |
1505 | ||
c8804c4f | 1506 | GCPRO1 (buffer); |
336cd056 | 1507 | |
eab3844f | 1508 | for (other = all_buffers; other; other = other->header.next.buffer) |
4a4a9db5 KH |
1509 | /* all_buffers contains dead buffers too; |
1510 | don't re-kill them. */ | |
4b4deea2 | 1511 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1512 | { |
8f54f30a PE |
1513 | Lisp_Object buf; |
1514 | XSETBUFFER (buf, other); | |
1515 | Fkill_buffer (buf); | |
336cd056 RS |
1516 | } |
1517 | ||
1518 | UNGCPRO; | |
1519 | } | |
177c0ea7 | 1520 | |
1ab256cb RM |
1521 | /* Make this buffer not be current. |
1522 | In the process, notice if this is the sole visible buffer | |
1523 | and give up if so. */ | |
1524 | if (b == current_buffer) | |
1525 | { | |
c8804c4f | 1526 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1527 | Fset_buffer (tem); |
1528 | if (b == current_buffer) | |
1529 | return Qnil; | |
1530 | } | |
1531 | ||
77270fac GM |
1532 | /* Notice if the buffer to kill is the sole visible buffer |
1533 | when we're currently in the mini-buffer, and give up if so. */ | |
1534 | XSETBUFFER (tem, current_buffer); | |
1535 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1536 | { | |
c8804c4f MR |
1537 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1538 | if (EQ (buffer, tem)) | |
77270fac GM |
1539 | return Qnil; |
1540 | } | |
1541 | ||
1ab256cb RM |
1542 | /* Now there is no question: we can kill the buffer. */ |
1543 | ||
1544 | #ifdef CLASH_DETECTION | |
1545 | /* Unlock this buffer's file, if it is locked. */ | |
1546 | unlock_buffer (b); | |
1547 | #endif /* CLASH_DETECTION */ | |
1548 | ||
c8804c4f MR |
1549 | GCPRO1 (buffer); |
1550 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1551 | UNGCPRO; |
1552 | ||
1553 | /* Killing buffer processes may run sentinels which may | |
1554 | have called kill-buffer. */ | |
1555 | ||
4b4deea2 | 1556 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1557 | return Qnil; |
1558 | ||
9397e56f MR |
1559 | /* These may run Lisp code and into infinite loops (if someone |
1560 | insisted on circular lists) so allow quitting here. */ | |
1561 | replace_buffer_in_windows (buffer); | |
1562 | frames_discard_buffer (buffer); | |
1563 | ||
b93fb365 | 1564 | clear_charpos_cache (b); |
1ab256cb RM |
1565 | |
1566 | tem = Vinhibit_quit; | |
1567 | Vinhibit_quit = Qt; | |
9397e56f | 1568 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1569 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
9397e56f MR |
1570 | /* If replace_buffer_in_windows didn't do its job correctly fix that |
1571 | now. */ | |
1572 | replace_buffer_in_windows_safely (buffer); | |
1ab256cb RM |
1573 | Vinhibit_quit = tem; |
1574 | ||
9cf712eb RS |
1575 | /* Delete any auto-save file, if we saved it in this session. |
1576 | But not if the buffer is modified. */ | |
4b4deea2 | 1577 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1578 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1579 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1580 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1581 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1582 | { |
8f54f30a PE |
1583 | Lisp_Object delete; |
1584 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1585 | if (! NILP (delete)) | |
4b4deea2 | 1586 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1587 | } |
1588 | ||
4a4a9db5 KH |
1589 | if (b->base_buffer) |
1590 | { | |
1591 | /* Unchain all markers that belong to this indirect buffer. | |
1592 | Don't unchain the markers that belong to the base buffer | |
1593 | or its other indirect buffers. */ | |
65745fad | 1594 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1595 | { |
65745fad | 1596 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1597 | if (m->buffer == b) |
65745fad SM |
1598 | unchain_marker (m); |
1599 | m = next; | |
4a4a9db5 KH |
1600 | } |
1601 | } | |
1602 | else | |
1ab256cb | 1603 | { |
4a4a9db5 | 1604 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1605 | and leave them pointing nowhere. */ |
65745fad | 1606 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1607 | { |
65745fad | 1608 | struct Lisp_Marker *next = m->next; |
336cd056 | 1609 | m->buffer = 0; |
65745fad SM |
1610 | m->next = NULL; |
1611 | m = next; | |
336cd056 | 1612 | } |
65745fad | 1613 | BUF_MARKERS (b) = NULL; |
336cd056 | 1614 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1615 | |
1616 | /* Perhaps we should explicitly free the interval tree here... */ | |
1617 | } | |
33f7013e | 1618 | |
2f3f993b RS |
1619 | /* Reset the local variables, so that this buffer's local values |
1620 | won't be protected from GC. They would be protected | |
1621 | if they happened to remain encached in their symbols. | |
1622 | This gets rid of them for certain. */ | |
1623 | swap_out_buffer_local_variables (b); | |
13de9290 | 1624 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1625 | |
4b4deea2 | 1626 | BVAR (b, name) = Qnil; |
336cd056 | 1627 | |
9ac0d9e0 | 1628 | BLOCK_INPUT; |
336cd056 | 1629 | if (! b->base_buffer) |
b86af064 | 1630 | free_buffer_text (b); |
336cd056 | 1631 | |
28e969dd JB |
1632 | if (b->newline_cache) |
1633 | { | |
1634 | free_region_cache (b->newline_cache); | |
1635 | b->newline_cache = 0; | |
1636 | } | |
1637 | if (b->width_run_cache) | |
1638 | { | |
1639 | free_region_cache (b->width_run_cache); | |
1640 | b->width_run_cache = 0; | |
1641 | } | |
4b4deea2 | 1642 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1643 | UNBLOCK_INPUT; |
4b4deea2 | 1644 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1645 | |
9397e56f MR |
1646 | /* Run buffer-list-update-hook. */ |
1647 | if (!NILP (Vrun_hooks)) | |
1648 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1649 | ||
1ab256cb RM |
1650 | return Qt; |
1651 | } | |
1652 | \f | |
9397e56f MR |
1653 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1654 | we do this each time BUFFER is selected visibly, the more recently | |
1655 | selected buffers are always closer to the front of those lists. This | |
1656 | means that other_buffer is more likely to choose a relevant buffer. | |
1657 | ||
1658 | Note that this moves BUFFER to the front of the buffer lists of the | |
1659 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1660 | shown in the selected frame, consider the present behavior a feature. | |
1661 | `select-window' gets this right since it shows BUFFER in the selected | |
1662 | window when calling us. */ | |
1ab256cb | 1663 | |
01136e9b | 1664 | void |
9397e56f | 1665 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1666 | { |
4475bec4 | 1667 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1668 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1669 | |
9397e56f | 1670 | CHECK_BUFFER (buffer); |
1ab256cb | 1671 | |
9397e56f MR |
1672 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1673 | Don't allow quitting since this might leave the buffer list in an | |
1674 | inconsistent state. */ | |
1675 | tem = Vinhibit_quit; | |
1676 | Vinhibit_quit = Qt; | |
1677 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1678 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1679 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1680 | XSETCDR (aelt_cons, Vbuffer_alist); |
1681 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1682 | Vinhibit_quit = tem; |
1ab256cb | 1683 | |
9397e56f MR |
1684 | /* Update buffer list of selected frame. */ |
1685 | f->buffer_list = Fcons (buffer, Fdelq (buffer, f->buffer_list)); | |
1686 | f->buried_buffer_list = Fdelq (buffer, f->buried_buffer_list); | |
177c0ea7 | 1687 | |
9397e56f MR |
1688 | /* Run buffer-list-update-hook. */ |
1689 | if (!NILP (Vrun_hooks)) | |
1690 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1691 | } | |
7962a441 | 1692 | |
9397e56f MR |
1693 | DEFUN ("record-buffer", Frecord_buffer, Srecord_buffer, 1, 1, 0, |
1694 | doc: /* Move BUFFER to the front of the buffer list. | |
1695 | Return BUFFER. */) | |
1696 | (Lisp_Object buffer) | |
1697 | { | |
1698 | CHECK_BUFFER (buffer); | |
7723e095 | 1699 | |
9397e56f | 1700 | record_buffer (buffer); |
a18b8cb5 | 1701 | |
9397e56f MR |
1702 | return buffer; |
1703 | } | |
7962a441 | 1704 | |
9397e56f MR |
1705 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1706 | buffer is killed. For the selected frame's buffer list this moves | |
1707 | BUFFER to its end even if it was never shown in that frame. If | |
1708 | this happens we have a feature, hence `unrecord-buffer' should be | |
1709 | called only when BUFFER was shown in the selected frame. */ | |
7962a441 | 1710 | |
9397e56f MR |
1711 | DEFUN ("unrecord-buffer", Funrecord_buffer, Sunrecord_buffer, 1, 1, 0, |
1712 | doc: /* Move BUFFER to the end of the buffer list. | |
1713 | Return BUFFER. */) | |
1714 | (Lisp_Object buffer) | |
1715 | { | |
4475bec4 | 1716 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1717 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1718 | |
9397e56f | 1719 | CHECK_BUFFER (buffer); |
177c0ea7 | 1720 | |
9397e56f MR |
1721 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1722 | Don't allow quitting since this might leave the buffer list in an | |
1723 | inconsistent state. */ | |
1724 | tem = Vinhibit_quit; | |
1725 | Vinhibit_quit = Qt; | |
1726 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1727 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1728 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1729 | XSETCDR (aelt_cons, Qnil); |
1730 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1731 | Vinhibit_quit = tem; |
1732 | ||
1733 | /* Update buffer lists of selected frame. */ | |
1734 | f->buffer_list = Fdelq (buffer, f->buffer_list); | |
1735 | f->buried_buffer_list = Fcons (buffer, Fdelq (buffer, f->buried_buffer_list)); | |
1736 | ||
1737 | /* Run buffer-list-update-hook. */ | |
1738 | if (!NILP (Vrun_hooks)) | |
1739 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1740 | ||
1741 | return buffer; | |
1ab256cb RM |
1742 | } |
1743 | ||
a9ee7a59 | 1744 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1745 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1746 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1747 | according to `default-major-mode'. |
018ba359 | 1748 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1749 | the current buffer's major mode. */) |
5842a27b | 1750 | (Lisp_Object buffer) |
a9ee7a59 KH |
1751 | { |
1752 | int count; | |
1753 | Lisp_Object function; | |
1754 | ||
ea4fddd8 JB |
1755 | CHECK_BUFFER (buffer); |
1756 | ||
4b4deea2 TT |
1757 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1758 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1759 | function = find_symbol_value (intern ("initial-major-mode")); |
1760 | else | |
1761 | { | |
4b4deea2 | 1762 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1763 | if (NILP (function) |
4b4deea2 TT |
1764 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1765 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1766 | } |
177c0ea7 | 1767 | |
48265e61 DL |
1768 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1769 | return Qnil; | |
1770 | ||
aed13378 | 1771 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1772 | |
48265e61 DL |
1773 | /* To select a nonfundamental mode, |
1774 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1775 | |
1776 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1777 | ||
a2428fa2 | 1778 | Fset_buffer (buffer); |
48265e61 | 1779 | call0 (function); |
a9ee7a59 KH |
1780 | |
1781 | return unbind_to (count, Qnil); | |
1782 | } | |
1783 | ||
a7ca3326 | 1784 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1785 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1786 | (void) |
1ab256cb RM |
1787 | { |
1788 | register Lisp_Object buf; | |
67180c6a | 1789 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1790 | return buf; |
1791 | } | |
1792 | \f | |
7ec44ec6 GM |
1793 | /* Set the current buffer to B. |
1794 | ||
1795 | We previously set windows_or_buffers_changed here to invalidate | |
1796 | global unchanged information in beg_unchanged and end_unchanged. | |
1797 | This is no longer necessary because we now compute unchanged | |
1798 | information on a buffer-basis. Every action affecting other | |
1799 | windows than the selected one requires a select_window at some | |
1800 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1801 | |
1802 | void | |
d3da34e0 | 1803 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1804 | { |
b5a225b4 | 1805 | if (current_buffer != b) |
7ec44ec6 | 1806 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1807 | } |
1808 | ||
1809 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1810 | This is used by redisplay. */ | |
1811 | ||
1812 | void | |
d3da34e0 | 1813 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1814 | { |
1815 | register struct buffer *old_buf; | |
ce5b453a | 1816 | register Lisp_Object tail; |
c7aa5005 | 1817 | |
b86af064 | 1818 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1819 | if (b->text->beg == NULL) |
b86af064 GM |
1820 | enlarge_buffer_text (b, 0); |
1821 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1822 | |
c7aa5005 KH |
1823 | if (current_buffer == b) |
1824 | return; | |
1825 | ||
1ab256cb RM |
1826 | old_buf = current_buffer; |
1827 | current_buffer = b; | |
1828 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1829 | ||
336cd056 RS |
1830 | if (old_buf) |
1831 | { | |
1832 | /* Put the undo list back in the base buffer, so that it appears | |
1833 | that an indirect buffer shares the undo list of its base. */ | |
1834 | if (old_buf->base_buffer) | |
4b4deea2 | 1835 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1836 | |
1837 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1838 | when it is not current, update them now. */ | |
cffc6f3b | 1839 | record_buffer_markers (old_buf); |
336cd056 RS |
1840 | } |
1841 | ||
1842 | /* Get the undo list from the base buffer, so that it appears | |
1843 | that an indirect buffer shares the undo list of its base. */ | |
1844 | if (b->base_buffer) | |
4b4deea2 | 1845 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1846 | |
1847 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1848 | when it is not current, fetch them now. */ | |
cffc6f3b | 1849 | fetch_buffer_markers (b); |
336cd056 | 1850 | |
1ab256cb RM |
1851 | /* Look down buffer's list of local Lisp variables |
1852 | to find and update any that forward into C variables. */ | |
1853 | ||
ce5b453a | 1854 | do |
1ab256cb | 1855 | { |
4b4deea2 | 1856 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1857 | { |
1858 | Lisp_Object var = XCAR (XCAR (tail)); | |
1859 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1860 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1861 | && SYMBOL_BLV (sym)->fwd) | |
1862 | /* Just reference the variable | |
1863 | to cause it to become set for this buffer. */ | |
1864 | Fsymbol_value (var); | |
1865 | } | |
1ab256cb | 1866 | } |
1ab256cb | 1867 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1868 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1869 | } |
1870 | ||
336cd056 | 1871 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1872 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1873 | |
1874 | void | |
d3da34e0 | 1875 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1876 | { |
1877 | register struct buffer *old_buf; | |
1878 | ||
1879 | if (current_buffer == b) | |
1880 | return; | |
1881 | ||
1882 | old_buf = current_buffer; | |
1883 | current_buffer = b; | |
1884 | ||
cffc6f3b CY |
1885 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1886 | when it is not current, update them now. */ | |
1887 | record_buffer_markers (old_buf); | |
336cd056 RS |
1888 | |
1889 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1890 | when it is not current, fetch them now. */ | |
cffc6f3b | 1891 | fetch_buffer_markers (b); |
336cd056 RS |
1892 | } |
1893 | ||
a7ca3326 | 1894 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1895 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1896 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1897 | also `save-excursion' when you want to make a buffer current | |
1898 | temporarily. This function does not display the buffer, so its effect | |
1899 | ends when the current command terminates. Use `switch-to-buffer' or | |
1900 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1901 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1902 | { |
c8804c4f MR |
1903 | register Lisp_Object buffer; |
1904 | buffer = Fget_buffer (buffer_or_name); | |
1905 | if (NILP (buffer)) | |
1906 | nsberror (buffer_or_name); | |
4b4deea2 | 1907 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1908 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1909 | set_buffer_internal (XBUFFER (buffer)); |
1910 | return buffer; | |
1ab256cb | 1911 | } |
d0628b06 RS |
1912 | |
1913 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1914 | ||
1915 | Lisp_Object | |
d3da34e0 | 1916 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1917 | { |
4b4deea2 | 1918 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1919 | Fset_buffer (buffer); |
1920 | return Qnil; | |
1921 | } | |
1ab256cb | 1922 | \f |
a7ca3326 | 1923 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1924 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1925 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1926 | (void) |
1ab256cb | 1927 | { |
4b4deea2 | 1928 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1929 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1930 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1931 | return Qnil; |
1932 | } | |
1ab256cb | 1933 | \f |
a7ca3326 | 1934 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1935 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1936 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 1937 | so the buffer is truly empty after this. */) |
5842a27b | 1938 | (void) |
1ab256cb RM |
1939 | { |
1940 | Fwiden (); | |
c0d9a0c3 GM |
1941 | |
1942 | del_range (BEG, Z); | |
c280bc6a | 1943 | |
1ab256cb RM |
1944 | current_buffer->last_window_start = 1; |
1945 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1946 | if future size is less than past size. Use of erase-buffer | |
1947 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 1948 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
1949 | return Qnil; |
1950 | } | |
1951 | ||
01136e9b | 1952 | void |
d3da34e0 | 1953 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 1954 | { |
b7826503 PJ |
1955 | CHECK_NUMBER_COERCE_MARKER (*b); |
1956 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1957 | |
1958 | if (XINT (*b) > XINT (*e)) | |
1959 | { | |
03192067 KH |
1960 | Lisp_Object tem; |
1961 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1962 | } |
1963 | ||
1964 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1965 | && XINT (*e) <= ZV)) | |
1966 | args_out_of_range (*b, *e); | |
1967 | } | |
1968 | \f | |
b05525fa RS |
1969 | /* Advance BYTE_POS up to a character boundary |
1970 | and return the adjusted position. */ | |
1971 | ||
0ceccced | 1972 | static EMACS_INT |
145582a0 | 1973 | advance_to_char_boundary (EMACS_INT byte_pos) |
b05525fa | 1974 | { |
f8449323 | 1975 | int c; |
b05525fa | 1976 | |
f8449323 RS |
1977 | if (byte_pos == BEG) |
1978 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 1979 | return BEG; |
f8449323 RS |
1980 | |
1981 | c = FETCH_BYTE (byte_pos); | |
1982 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1983 | { |
1be6387d | 1984 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 1985 | multibyte sequence. */ |
145582a0 | 1986 | EMACS_INT orig_byte_pos = byte_pos; |
a9bcded1 KH |
1987 | |
1988 | do | |
1989 | { | |
1990 | byte_pos--; | |
1991 | c = FETCH_BYTE (byte_pos); | |
1992 | } | |
1993 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 1994 | INC_POS (byte_pos); |
a9bcded1 KH |
1995 | if (byte_pos < orig_byte_pos) |
1996 | byte_pos = orig_byte_pos; | |
f8449323 RS |
1997 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
1998 | surely advance to the correct character boundary. If C is | |
1999 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2000 | } |
2001 | ||
20773569 | 2002 | return byte_pos; |
b05525fa RS |
2003 | } |
2004 | ||
baae5c2d | 2005 | #ifdef REL_ALLOC |
f57e2426 | 2006 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2007 | #endif /* REL_ALLOC */ |
2008 | ||
13cda5f9 SM |
2009 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2010 | 1, 1, 0, | |
2011 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2012 | (Lisp_Object buffer) |
13cda5f9 SM |
2013 | { |
2014 | struct buffer *other_buffer; | |
2015 | CHECK_BUFFER (buffer); | |
2016 | other_buffer = XBUFFER (buffer); | |
2017 | ||
4b4deea2 | 2018 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2019 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2020 | |
13cda5f9 SM |
2021 | /* Actually, it probably works just fine. |
2022 | * if (other_buffer == current_buffer) | |
2023 | * error ("Cannot swap a buffer's text with itself"); */ | |
2024 | ||
2025 | /* Actually, this may be workable as well, tho probably only if they're | |
2026 | *both* indirect. */ | |
2027 | if (other_buffer->base_buffer | |
2028 | || current_buffer->base_buffer) | |
2029 | error ("Cannot swap indirect buffers's text"); | |
2030 | ||
2031 | { /* This is probably harder to make work. */ | |
2032 | struct buffer *other; | |
eab3844f | 2033 | for (other = all_buffers; other; other = other->header.next.buffer) |
13cda5f9 SM |
2034 | if (other->base_buffer == other_buffer |
2035 | || other->base_buffer == current_buffer) | |
2036 | error ("One of the buffers to swap has indirect buffers"); | |
2037 | } | |
2038 | ||
2039 | #define swapfield(field, type) \ | |
2040 | do { \ | |
2041 | type tmp##field = other_buffer->field; \ | |
2042 | other_buffer->field = current_buffer->field; \ | |
2043 | current_buffer->field = tmp##field; \ | |
2044 | } while (0) | |
5d8ea120 TT |
2045 | #define swapfield_(field, type) \ |
2046 | do { \ | |
4b4deea2 TT |
2047 | type tmp##field = BVAR (other_buffer, field); \ |
2048 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2049 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2050 | } while (0) |
13cda5f9 SM |
2051 | |
2052 | swapfield (own_text, struct buffer_text); | |
2053 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2054 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2055 | #ifdef REL_ALLOC |
40b615d6 JR |
2056 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2057 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2058 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2059 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2060 | #endif /* REL_ALLOC */ |
2061 | ||
13cda5f9 SM |
2062 | swapfield (pt, EMACS_INT); |
2063 | swapfield (pt_byte, EMACS_INT); | |
2064 | swapfield (begv, EMACS_INT); | |
2065 | swapfield (begv_byte, EMACS_INT); | |
2066 | swapfield (zv, EMACS_INT); | |
2067 | swapfield (zv_byte, EMACS_INT); | |
2068 | eassert (!current_buffer->base_buffer); | |
2069 | eassert (!other_buffer->base_buffer); | |
2070 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2071 | swapfield (newline_cache, struct region_cache *); | |
2072 | swapfield (width_run_cache, struct region_cache *); | |
2073 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2074 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2075 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2076 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2077 | swapfield (overlay_center, EMACS_INT); | |
5d8ea120 TT |
2078 | swapfield_ (undo_list, Lisp_Object); |
2079 | swapfield_ (mark, Lisp_Object); | |
2080 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2081 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2082 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2083 | /* FIXME: Not sure what we should do with these *_marker fields. |
2084 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2085 | swapfield_ (pt_marker, Lisp_Object); |
2086 | swapfield_ (begv_marker, Lisp_Object); | |
2087 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2088 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2089 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2090 | |
2091 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2092 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2093 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2094 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2095 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2096 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2097 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2098 | { |
2099 | struct Lisp_Marker *m; | |
2100 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2101 | if (m->buffer == other_buffer) | |
2102 | m->buffer = current_buffer; | |
b8ff72fa SM |
2103 | else |
2104 | /* Since there's no indirect buffer in sight, markers on | |
2105 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2106 | eassert (!m->buffer); | |
13cda5f9 SM |
2107 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2108 | if (m->buffer == current_buffer) | |
2109 | m->buffer = other_buffer; | |
b8ff72fa SM |
2110 | else |
2111 | /* Since there's no indirect buffer in sight, markers on | |
2112 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2113 | eassert (!m->buffer); | |
13cda5f9 | 2114 | } |
126f1fc1 SM |
2115 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2116 | So since we just swapped the markers between the two buffers, we need | |
2117 | to undo the effect of this swap for window markers. */ | |
2118 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2119 | Lisp_Object buf1, buf2; | |
2120 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2121 | ||
2122 | while (NILP (Fmemq (w, ws))) | |
2123 | { | |
2124 | ws = Fcons (w, ws); | |
2125 | if (MARKERP (XWINDOW (w)->pointm) | |
2126 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2127 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2128 | Fset_marker (XWINDOW (w)->pointm, | |
2129 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2130 | XWINDOW (w)->buffer); | |
2131 | w = Fnext_window (w, Qt, Qt); | |
2132 | } | |
2133 | } | |
2134 | ||
13cda5f9 SM |
2135 | if (current_buffer->text->intervals) |
2136 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2137 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2138 | if (other_buffer->text->intervals) | |
2139 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2140 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2141 | ||
2142 | return Qnil; | |
2143 | } | |
2144 | ||
a7ca3326 | 2145 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2146 | 1, 1, 0, |
7ee72033 | 2147 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2148 | If FLAG is t, this makes the buffer a multibyte buffer. |
2149 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2150 | In these cases, the buffer contents remain unchanged as a sequence of |
2151 | bytes but the contents viewed as characters do change. | |
2152 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2153 | all eight-bit bytes to eight-bit characters. |
2154 | If the multibyte flag was really changed, undo information of the | |
2155 | current buffer is cleared. */) | |
5842a27b | 2156 | (Lisp_Object flag) |
3ac81adb | 2157 | { |
65745fad | 2158 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2159 | struct buffer *other; |
145582a0 | 2160 | EMACS_INT begv, zv; |
8d1203ea | 2161 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2162 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2163 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2164 | struct gcpro gcpro1; |
3ac81adb | 2165 | |
6e553d5e RS |
2166 | if (current_buffer->base_buffer) |
2167 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2168 | ||
70e77119 | 2169 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2170 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2171 | return flag; |
2172 | ||
38babc07 KS |
2173 | GCPRO1 (old_undo); |
2174 | ||
2175 | /* Don't record these buffer changes. We will put a special undo entry | |
2176 | instead. */ | |
4b4deea2 | 2177 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2178 | |
3ac81adb RS |
2179 | /* If the cached position is for this buffer, clear it out. */ |
2180 | clear_charpos_cache (current_buffer); | |
2181 | ||
458c8af4 KH |
2182 | if (NILP (flag)) |
2183 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2184 | else | |
2185 | begv = BEGV, zv = ZV; | |
2186 | ||
a9bcded1 KH |
2187 | if (narrowed) |
2188 | Fwiden (); | |
2189 | ||
3ac81adb RS |
2190 | if (NILP (flag)) |
2191 | { | |
145582a0 | 2192 | EMACS_INT pos, stop; |
a9bcded1 KH |
2193 | unsigned char *p; |
2194 | ||
3ac81adb RS |
2195 | /* Do this first, so it can use CHAR_TO_BYTE |
2196 | to calculate the old correspondences. */ | |
2197 | set_intervals_multibyte (0); | |
2198 | ||
4b4deea2 | 2199 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2200 | |
2201 | Z = Z_BYTE; | |
2202 | BEGV = BEGV_BYTE; | |
2203 | ZV = ZV_BYTE; | |
2204 | GPT = GPT_BYTE; | |
2205 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2206 | ||
60ebfdf3 | 2207 | |
65745fad SM |
2208 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2209 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2210 | |
2211 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2212 | pos = BEG; | |
2213 | stop = GPT; | |
2214 | p = BEG_ADDR; | |
2215 | while (1) | |
2216 | { | |
2217 | int c, bytes; | |
2218 | ||
2219 | if (pos == stop) | |
2220 | { | |
2221 | if (pos == Z) | |
2222 | break; | |
2223 | p = GAP_END_ADDR; | |
2224 | stop = Z; | |
2225 | } | |
8f348ed5 KH |
2226 | if (ASCII_BYTE_P (*p)) |
2227 | p++, pos++; | |
2228 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2229 | { |
62a6e103 | 2230 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2231 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2232 | last one, and change the last one to the character |
a9bcded1 KH |
2233 | code. */ |
2234 | bytes--; | |
2235 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2236 | p = GAP_END_ADDR; | |
2237 | *p++ = c; | |
2238 | pos++; | |
2239 | if (begv > pos) | |
2240 | begv -= bytes; | |
2241 | if (zv > pos) | |
2242 | zv -= bytes; | |
2243 | stop = Z; | |
2244 | } | |
8f924df7 | 2245 | else |
8f348ed5 KH |
2246 | { |
2247 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2248 | p += bytes, pos += bytes; | |
2249 | } | |
a9bcded1 KH |
2250 | } |
2251 | if (narrowed) | |
2252 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2253 | } |
2254 | else | |
2255 | { | |
145582a0 EZ |
2256 | EMACS_INT pt = PT; |
2257 | EMACS_INT pos, stop; | |
8f348ed5 | 2258 | unsigned char *p, *pend; |
a9bcded1 | 2259 | |
673c57d2 | 2260 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2261 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2262 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2263 | |
8f924df7 | 2264 | if (EQ (flag, Qt) |
a3a303df | 2265 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2266 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2267 | { | |
8f54f30a | 2268 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2269 | |
8f54f30a PE |
2270 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2271 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2272 | { |
8f54f30a | 2273 | EMACS_INT new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2274 | |
2275 | move_gap_both (new_gpt, new_gpt); | |
2276 | } | |
2277 | } | |
2278 | ||
a9bcded1 KH |
2279 | /* Make the buffer contents valid as multibyte by converting |
2280 | 8-bit characters to multibyte form. */ | |
2281 | pos = BEG; | |
2282 | stop = GPT; | |
2283 | p = BEG_ADDR; | |
8f348ed5 | 2284 | pend = GPT_ADDR; |
a9bcded1 KH |
2285 | while (1) |
2286 | { | |
2287 | int bytes; | |
2288 | ||
2289 | if (pos == stop) | |
2290 | { | |
2291 | if (pos == Z) | |
2292 | break; | |
2293 | p = GAP_END_ADDR; | |
8f348ed5 | 2294 | pend = Z_ADDR; |
a9bcded1 KH |
2295 | stop = Z; |
2296 | } | |
177c0ea7 | 2297 | |
a3a303df KH |
2298 | if (ASCII_BYTE_P (*p)) |
2299 | p++, pos++; | |
dcfb9bc4 KH |
2300 | else if (EQ (flag, Qt) |
2301 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2302 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2303 | p += bytes, pos += bytes; |
2304 | else | |
2305 | { | |
2306 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2307 | int c; |
a9bcded1 | 2308 | |
8f924df7 | 2309 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2310 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2311 | *p = tmp[0]; |
2312 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2313 | bytes--; | |
b68864e5 | 2314 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2315 | /* Now the gap is after the just inserted data. */ |
2316 | pos = GPT; | |
2317 | p = GAP_END_ADDR; | |
2318 | if (pos <= begv) | |
2319 | begv += bytes; | |
2320 | if (pos <= zv) | |
2321 | zv += bytes; | |
2322 | if (pos <= pt) | |
2323 | pt += bytes; | |
31285a8f | 2324 | pend = Z_ADDR; |
a9bcded1 KH |
2325 | stop = Z; |
2326 | } | |
2327 | } | |
2328 | ||
2329 | if (pt != PT) | |
2330 | TEMP_SET_PT (pt); | |
2331 | ||
2332 | if (narrowed) | |
2333 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2334 | ||
3ac81adb RS |
2335 | /* Do this first, so that chars_in_text asks the right question. |
2336 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2337 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2338 | |
b05525fa | 2339 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2340 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2341 | |
673c57d2 | 2342 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2343 | |
2344 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2345 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2346 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2347 | else |
2348 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2349 | |
2350 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2351 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2352 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2353 | else |
2354 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2355 | |
2356 | { | |
8f54f30a PE |
2357 | EMACS_INT byte = advance_to_char_boundary (PT_BYTE); |
2358 | EMACS_INT position; | |
b05525fa | 2359 | |
8f54f30a PE |
2360 | if (byte > GPT_BYTE) |
2361 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2362 | else |
8f54f30a PE |
2363 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2364 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2365 | } |
3ac81adb RS |
2366 | |
2367 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2368 | |
2369 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2370 | getting confused by the markers that have not yet been updated. | |
2371 | It is also a signal that it should never create a marker. */ | |
65745fad | 2372 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2373 | |
65745fad | 2374 | for (; tail; tail = tail->next) |
3ac81adb | 2375 | { |
65745fad SM |
2376 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2377 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2378 | } |
b69f9797 RS |
2379 | |
2380 | /* Make sure no markers were put on the chain | |
2381 | while the chain value was incorrect. */ | |
65745fad | 2382 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2383 | abort (); |
2384 | ||
3ac81adb RS |
2385 | BUF_MARKERS (current_buffer) = markers; |
2386 | ||
2387 | /* Do this last, so it can calculate the new correspondences | |
2388 | between chars and bytes. */ | |
2389 | set_intervals_multibyte (1); | |
2390 | } | |
2391 | ||
38babc07 KS |
2392 | if (!EQ (old_undo, Qt)) |
2393 | { | |
2394 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2395 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2396 | intern ("set-buffer-multibyte"), |
2397 | NILP (flag) ? Qt : Qnil), | |
2398 | old_undo); | |
38babc07 KS |
2399 | } |
2400 | ||
2401 | UNGCPRO; | |
a9bcded1 | 2402 | |
724b203f GM |
2403 | /* Changing the multibyteness of a buffer means that all windows |
2404 | showing that buffer must be updated thoroughly. */ | |
2405 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2406 | ++windows_or_buffers_changed; | |
2407 | ||
abc9d959 RS |
2408 | /* Copy this buffer's new multibyte status |
2409 | into all of its indirect buffers. */ | |
eab3844f | 2410 | for (other = all_buffers; other; other = other->header.next.buffer) |
4b4deea2 | 2411 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2412 | { |
4b4deea2 TT |
2413 | BVAR (other, enable_multibyte_characters) |
2414 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2415 | other->prevent_redisplay_optimizations_p = 1; |
2416 | } | |
abc9d959 | 2417 | |
ed00559d KH |
2418 | /* Restore the modifiedness of the buffer. */ |
2419 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2420 | Fset_buffer_modified_p (Qnil); | |
2421 | ||
172f9454 KH |
2422 | /* Update coding systems of this buffer's process (if any). */ |
2423 | { | |
2424 | Lisp_Object process; | |
2425 | ||
2426 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2427 | if (PROCESSP (process)) | |
2428 | setup_process_coding_systems (process); | |
2429 | } | |
2430 | ||
3ac81adb RS |
2431 | return flag; |
2432 | } | |
2433 | \f | |
a7ca3326 | 2434 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2435 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2436 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2437 | Most local variable bindings are eliminated so that the default values |
2438 | become effective once more. Also, the syntax table is set from | |
2439 | `standard-syntax-table', the local keymap is set to nil, | |
2440 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2441 | This function also forces redisplay of the mode line. | |
2442 | ||
2443 | Every function to select a new major mode starts by | |
2444 | calling this function. | |
2445 | ||
2446 | As a special exception, local variables whose names have | |
2447 | a non-nil `permanent-local' property are not eliminated by this function. | |
2448 | ||
2449 | The first thing this function does is run | |
7ee72033 | 2450 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2451 | (void) |
1ab256cb | 2452 | { |
dee091a3 | 2453 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2454 | |
3709505e | 2455 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2456 | remain swapped in, in their symbols. */ |
1ab256cb | 2457 | |
2f3f993b | 2458 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2459 | |
2460 | /* Actually eliminate all local bindings of this buffer. */ | |
2461 | ||
13de9290 | 2462 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2463 | |
1ab256cb RM |
2464 | /* Force mode-line redisplay. Useful here because all major mode |
2465 | commands call this function. */ | |
2466 | update_mode_lines++; | |
2467 | ||
2468 | return Qnil; | |
2469 | } | |
2f3f993b RS |
2470 | |
2471 | /* Make sure no local variables remain set up with buffer B | |
2472 | for their current values. */ | |
2473 | ||
2474 | static void | |
d3da34e0 | 2475 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2476 | { |
ce5b453a | 2477 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2478 | |
2479 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2480 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2481 | |
67ee9f6e | 2482 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2483 | { |
ce5b453a SM |
2484 | Lisp_Object sym = XCAR (XCAR (alist)); |
2485 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2486 | /* Need not do anything if some other buffer's binding is | |
2487 | now encached. */ | |
2488 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2489 | { |
e7c10f83 SM |
2490 | /* Symbol is set up for this buffer's old local value: |
2491 | swap it out! */ | |
ce5b453a | 2492 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2493 | } |
2494 | } | |
2495 | } | |
1ab256cb | 2496 | \f |
2eec3b4e | 2497 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2498 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2499 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2500 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2501 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2502 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2503 | or where an overlay starts which ends at or after POS; |
624d2678 | 2504 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2505 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2506 | |
2507 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2508 | when this function is called. |
2509 | ||
2510 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2511 | If EXTEND is zero, we never extend the vector, | |
2512 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2513 | But we still return the total number of overlays. |
2514 | ||
2515 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2516 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2517 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2518 | |
2519 | int | |
d3da34e0 JB |
2520 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2521 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2522 | { |
2410d73a SM |
2523 | Lisp_Object overlay, start, end; |
2524 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2525 | int idx = 0; |
2526 | int len = *len_ptr; | |
2527 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2528 | EMACS_INT next = ZV; |
2529 | EMACS_INT prev = BEGV; | |
61d54cd5 RS |
2530 | int inhibit_storing = 0; |
2531 | ||
2410d73a | 2532 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2533 | { |
145582a0 | 2534 | EMACS_INT startpos, endpos; |
52f8ec73 | 2535 | |
2410d73a | 2536 | XSETMISC (overlay, tail); |
1ab256cb | 2537 | |
2eec3b4e RS |
2538 | start = OVERLAY_START (overlay); |
2539 | end = OVERLAY_END (overlay); | |
239c932b RS |
2540 | endpos = OVERLAY_POSITION (end); |
2541 | if (endpos < pos) | |
2542 | { | |
2543 | if (prev < endpos) | |
2544 | prev = endpos; | |
2545 | break; | |
2546 | } | |
413e06a4 RS |
2547 | startpos = OVERLAY_POSITION (start); |
2548 | /* This one ends at or after POS | |
daa1c109 | 2549 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2550 | if (prev < startpos && startpos < pos) |
2551 | prev = startpos; | |
239c932b RS |
2552 | if (endpos == pos) |
2553 | continue; | |
2eec3b4e RS |
2554 | if (startpos <= pos) |
2555 | { | |
2556 | if (idx == len) | |
2557 | { | |
61d54cd5 RS |
2558 | /* The supplied vector is full. |
2559 | Either make it bigger, or don't store any more in it. */ | |
2560 | if (extend) | |
2561 | { | |
0552666b GM |
2562 | /* Make it work with an initial len == 0. */ |
2563 | len *= 2; | |
2564 | if (len == 0) | |
2565 | len = 4; | |
2566 | *len_ptr = len; | |
61d54cd5 RS |
2567 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2568 | *vec_ptr = vec; | |
2569 | } | |
2570 | else | |
2571 | inhibit_storing = 1; | |
2eec3b4e | 2572 | } |
61d54cd5 RS |
2573 | |
2574 | if (!inhibit_storing) | |
2575 | vec[idx] = overlay; | |
2576 | /* Keep counting overlays even if we can't return them all. */ | |
2577 | idx++; | |
2eec3b4e RS |
2578 | } |
2579 | else if (startpos < next) | |
2580 | next = startpos; | |
2581 | } | |
2582 | ||
2410d73a | 2583 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2584 | { |
145582a0 | 2585 | EMACS_INT startpos, endpos; |
52f8ec73 | 2586 | |
2410d73a | 2587 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2588 | |
2589 | start = OVERLAY_START (overlay); | |
2590 | end = OVERLAY_END (overlay); | |
2591 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2592 | if (pos < startpos) |
2eec3b4e RS |
2593 | { |
2594 | if (startpos < next) | |
2595 | next = startpos; | |
2596 | break; | |
2597 | } | |
239c932b RS |
2598 | endpos = OVERLAY_POSITION (end); |
2599 | if (pos < endpos) | |
2eec3b4e RS |
2600 | { |
2601 | if (idx == len) | |
2602 | { | |
61d54cd5 RS |
2603 | if (extend) |
2604 | { | |
4b0e44fc RS |
2605 | /* Make it work with an initial len == 0. */ |
2606 | len *= 2; | |
0552666b | 2607 | if (len == 0) |
4b0e44fc RS |
2608 | len = 4; |
2609 | *len_ptr = len; | |
61d54cd5 RS |
2610 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2611 | *vec_ptr = vec; | |
2612 | } | |
2613 | else | |
2614 | inhibit_storing = 1; | |
2eec3b4e | 2615 | } |
61d54cd5 RS |
2616 | |
2617 | if (!inhibit_storing) | |
2618 | vec[idx] = overlay; | |
2619 | idx++; | |
413e06a4 RS |
2620 | |
2621 | if (startpos < pos && startpos > prev) | |
2622 | prev = startpos; | |
2eec3b4e | 2623 | } |
239c932b RS |
2624 | else if (endpos < pos && endpos > prev) |
2625 | prev = endpos; | |
1d5f4c1d MB |
2626 | else if (endpos == pos && startpos > prev |
2627 | && (!change_req || startpos < pos)) | |
413e06a4 | 2628 | prev = startpos; |
1ab256cb RM |
2629 | } |
2630 | ||
239c932b RS |
2631 | if (next_ptr) |
2632 | *next_ptr = next; | |
2633 | if (prev_ptr) | |
2634 | *prev_ptr = prev; | |
2eec3b4e RS |
2635 | return idx; |
2636 | } | |
74514898 | 2637 | \f |
7723e095 MR |
2638 | /* Find all the overlays in the current buffer that overlap the range |
2639 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2640 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2641 | |
177c0ea7 | 2642 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2643 | Store in *LEN_PTR the size allocated for the vector. |
2644 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2645 | or ZV if there are no more overlays. | |
2646 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2647 | or BEGV if there are no previous overlays. | |
2648 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2649 | ||
2650 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2651 | when this function is called. | |
2652 | ||
2653 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2654 | If EXTEND is zero, we never extend the vector, | |
2655 | and we store only as many overlays as will fit. | |
2656 | But we still return the total number of overlays. */ | |
2657 | ||
a9b9a780 | 2658 | static int |
145582a0 EZ |
2659 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
2660 | Lisp_Object **vec_ptr, int *len_ptr, | |
2661 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr) | |
74514898 | 2662 | { |
2410d73a SM |
2663 | Lisp_Object overlay, ostart, oend; |
2664 | struct Lisp_Overlay *tail; | |
74514898 RS |
2665 | int idx = 0; |
2666 | int len = *len_ptr; | |
2667 | Lisp_Object *vec = *vec_ptr; | |
145582a0 EZ |
2668 | EMACS_INT next = ZV; |
2669 | EMACS_INT prev = BEGV; | |
74514898 | 2670 | int inhibit_storing = 0; |
7723e095 | 2671 | int end_is_Z = end == Z; |
74514898 | 2672 | |
2410d73a | 2673 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2674 | { |
145582a0 | 2675 | EMACS_INT startpos, endpos; |
74514898 | 2676 | |
2410d73a | 2677 | XSETMISC (overlay, tail); |
74514898 RS |
2678 | |
2679 | ostart = OVERLAY_START (overlay); | |
2680 | oend = OVERLAY_END (overlay); | |
2681 | endpos = OVERLAY_POSITION (oend); | |
2682 | if (endpos < beg) | |
2683 | { | |
2684 | if (prev < endpos) | |
2685 | prev = endpos; | |
2686 | break; | |
2687 | } | |
2688 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2689 | /* Count an interval if it overlaps the range, is empty at the |
2690 | start of the range, or is empty at END provided END denotes the | |
2691 | end of the buffer. */ | |
74514898 | 2692 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2693 | || (startpos == endpos |
2694 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2695 | { |
2696 | if (idx == len) | |
2697 | { | |
2698 | /* The supplied vector is full. | |
2699 | Either make it bigger, or don't store any more in it. */ | |
2700 | if (extend) | |
2701 | { | |
4b0e44fc RS |
2702 | /* Make it work with an initial len == 0. */ |
2703 | len *= 2; | |
2704 | if (len == 0) | |
2705 | len = 4; | |
2706 | *len_ptr = len; | |
74514898 RS |
2707 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2708 | *vec_ptr = vec; | |
2709 | } | |
2710 | else | |
2711 | inhibit_storing = 1; | |
2712 | } | |
2713 | ||
2714 | if (!inhibit_storing) | |
2715 | vec[idx] = overlay; | |
2716 | /* Keep counting overlays even if we can't return them all. */ | |
2717 | idx++; | |
2718 | } | |
2719 | else if (startpos < next) | |
2720 | next = startpos; | |
2721 | } | |
2722 | ||
2410d73a | 2723 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2724 | { |
145582a0 | 2725 | EMACS_INT startpos, endpos; |
74514898 | 2726 | |
2410d73a | 2727 | XSETMISC (overlay, tail); |
74514898 RS |
2728 | |
2729 | ostart = OVERLAY_START (overlay); | |
2730 | oend = OVERLAY_END (overlay); | |
2731 | startpos = OVERLAY_POSITION (ostart); | |
2732 | if (end < startpos) | |
2733 | { | |
2734 | if (startpos < next) | |
2735 | next = startpos; | |
2736 | break; | |
2737 | } | |
2738 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2739 | /* Count an interval if it overlaps the range, is empty at the |
2740 | start of the range, or is empty at END provided END denotes the | |
2741 | end of the buffer. */ | |
74514898 | 2742 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2743 | || (startpos == endpos |
2744 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2745 | { |
2746 | if (idx == len) | |
2747 | { | |
2748 | if (extend) | |
2749 | { | |
4b0e44fc RS |
2750 | /* Make it work with an initial len == 0. */ |
2751 | len *= 2; | |
2752 | if (len == 0) | |
2753 | len = 4; | |
2754 | *len_ptr = len; | |
74514898 RS |
2755 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2756 | *vec_ptr = vec; | |
2757 | } | |
2758 | else | |
2759 | inhibit_storing = 1; | |
2760 | } | |
2761 | ||
2762 | if (!inhibit_storing) | |
2763 | vec[idx] = overlay; | |
2764 | idx++; | |
2765 | } | |
2766 | else if (endpos < beg && endpos > prev) | |
2767 | prev = endpos; | |
2768 | } | |
fc04fa47 | 2769 | |
74514898 RS |
2770 | if (next_ptr) |
2771 | *next_ptr = next; | |
2772 | if (prev_ptr) | |
2773 | *prev_ptr = prev; | |
2774 | return idx; | |
2775 | } | |
09a22085 GM |
2776 | |
2777 | ||
2778 | /* Return non-zero if there exists an overlay with a non-nil | |
2779 | `mouse-face' property overlapping OVERLAY. */ | |
2780 | ||
2781 | int | |
d3da34e0 | 2782 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2783 | { |
145582a0 EZ |
2784 | EMACS_INT start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2785 | EMACS_INT end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2786 | int n, i, size; |
09a22085 | 2787 | Lisp_Object *v, tem; |
177c0ea7 | 2788 | |
bfd8410f GM |
2789 | size = 10; |
2790 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2791 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2792 | if (n > size) | |
09a22085 | 2793 | { |
09a22085 GM |
2794 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2795 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2796 | } | |
2797 | ||
2798 | for (i = 0; i < n; ++i) | |
2799 | if (!EQ (v[i], overlay) | |
2800 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2801 | !NILP (tem))) | |
2802 | break; | |
2803 | ||
2804 | return i < n; | |
2805 | } | |
2806 | ||
2807 | ||
74514898 | 2808 | \f |
fc04fa47 KH |
2809 | /* Fast function to just test if we're at an overlay boundary. */ |
2810 | int | |
145582a0 | 2811 | overlay_touches_p (EMACS_INT pos) |
fc04fa47 | 2812 | { |
2410d73a SM |
2813 | Lisp_Object overlay; |
2814 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2815 | |
2410d73a | 2816 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2817 | { |
145582a0 | 2818 | EMACS_INT endpos; |
fc04fa47 | 2819 | |
2410d73a | 2820 | XSETMISC (overlay ,tail); |
8e50cc2d | 2821 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2822 | abort (); |
2823 | ||
2824 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2825 | if (endpos < pos) | |
2826 | break; | |
2827 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2828 | return 1; | |
2829 | } | |
2830 | ||
2410d73a | 2831 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2832 | { |
145582a0 | 2833 | EMACS_INT startpos; |
fc04fa47 | 2834 | |
2410d73a | 2835 | XSETMISC (overlay, tail); |
8e50cc2d | 2836 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2837 | abort (); |
2838 | ||
2839 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2840 | if (pos < startpos) | |
2841 | break; | |
2842 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2843 | return 1; | |
2844 | } | |
2845 | return 0; | |
2846 | } | |
2eec3b4e | 2847 | \f |
5985d248 KH |
2848 | struct sortvec |
2849 | { | |
2850 | Lisp_Object overlay; | |
145582a0 | 2851 | EMACS_INT beg, end; |
fadf4e30 | 2852 | EMACS_INT priority; |
5985d248 KH |
2853 | }; |
2854 | ||
2855 | static int | |
d3da34e0 | 2856 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2857 | { |
dfcf069d AS |
2858 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2859 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2860 | if (s1->priority != s2->priority) |
c20998a7 | 2861 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2862 | if (s1->beg != s2->beg) |
c20998a7 | 2863 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2864 | if (s1->end != s2->end) |
c20998a7 | 2865 | return s2->end < s1->end ? -1 : 1; |
5985d248 KH |
2866 | return 0; |
2867 | } | |
2868 | ||
2869 | /* Sort an array of overlays by priority. The array is modified in place. | |
2870 | The return value is the new size; this may be smaller than the original | |
2871 | size if some of the overlays were invalid or were window-specific. */ | |
2872 | int | |
d3da34e0 | 2873 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
2874 | { |
2875 | int i, j; | |
2876 | struct sortvec *sortvec; | |
2877 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2878 | ||
2879 | /* Put the valid and relevant overlays into sortvec. */ | |
2880 | ||
2881 | for (i = 0, j = 0; i < noverlays; i++) | |
2882 | { | |
0fa767e7 | 2883 | Lisp_Object tem; |
c99fc30f | 2884 | Lisp_Object overlay; |
5985d248 | 2885 | |
c99fc30f | 2886 | overlay = overlay_vec[i]; |
5985d248 KH |
2887 | if (OVERLAY_VALID (overlay) |
2888 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2889 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2890 | { | |
0fa767e7 KH |
2891 | /* If we're interested in a specific window, then ignore |
2892 | overlays that are limited to some other window. */ | |
2893 | if (w) | |
5985d248 | 2894 | { |
0fa767e7 KH |
2895 | Lisp_Object window; |
2896 | ||
2897 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2898 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2899 | continue; |
5985d248 | 2900 | } |
0fa767e7 KH |
2901 | |
2902 | /* This overlay is good and counts: put it into sortvec. */ | |
2903 | sortvec[j].overlay = overlay; | |
2904 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2905 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2906 | tem = Foverlay_get (overlay, Qpriority); | |
2907 | if (INTEGERP (tem)) | |
2908 | sortvec[j].priority = XINT (tem); | |
2909 | else | |
2910 | sortvec[j].priority = 0; | |
2911 | j++; | |
5985d248 KH |
2912 | } |
2913 | } | |
2914 | noverlays = j; | |
2915 | ||
2916 | /* Sort the overlays into the proper order: increasing priority. */ | |
2917 | ||
2918 | if (noverlays > 1) | |
2919 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2920 | ||
2921 | for (i = 0; i < noverlays; i++) | |
2922 | overlay_vec[i] = sortvec[i].overlay; | |
2923 | return (noverlays); | |
2924 | } | |
2925 | \f | |
bbbe9545 KH |
2926 | struct sortstr |
2927 | { | |
cb26008f | 2928 | Lisp_Object string, string2; |
93cb6be3 | 2929 | ptrdiff_t size; |
8961a454 | 2930 | EMACS_INT priority; |
bbbe9545 KH |
2931 | }; |
2932 | ||
e8185fa8 KH |
2933 | struct sortstrlist |
2934 | { | |
2935 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2936 | int size; /* Allocated length of that array. */ | |
2937 | int used; /* How much of the array is currently in use. */ | |
145582a0 | 2938 | EMACS_INT bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
2939 | }; |
2940 | ||
2941 | /* Buffers for storing information about the overlays touching a given | |
2942 | position. These could be automatic variables in overlay_strings, but | |
2943 | it's more efficient to hold onto the memory instead of repeatedly | |
2944 | allocating and freeing it. */ | |
2945 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2946 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2947 | |
2948 | /* Allocated length of overlay_str_buf. */ | |
145582a0 | 2949 | static EMACS_INT overlay_str_len; |
e8185fa8 | 2950 | |
bbbe9545 KH |
2951 | /* A comparison function suitable for passing to qsort. */ |
2952 | static int | |
d3da34e0 | 2953 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
2954 | { |
2955 | struct sortstr *s1 = (struct sortstr *)as1; | |
2956 | struct sortstr *s2 = (struct sortstr *)as2; | |
2957 | if (s1->size != s2->size) | |
c20998a7 | 2958 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 2959 | if (s1->priority != s2->priority) |
c20998a7 | 2960 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
2961 | return 0; |
2962 | } | |
2963 | ||
e8185fa8 | 2964 | static void |
93cb6be3 PE |
2965 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
2966 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 2967 | { |
145582a0 | 2968 | EMACS_INT nbytes; |
43d27a72 | 2969 | |
e8185fa8 KH |
2970 | if (ssl->used == ssl->size) |
2971 | { | |
2972 | if (ssl->buf) | |
2973 | ssl->size *= 2; | |
2974 | else | |
2975 | ssl->size = 5; | |
2976 | ssl->buf = ((struct sortstr *) | |
2977 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2978 | } | |
2979 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2980 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2981 | ssl->buf[ssl->used].size = size; |
2982 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2983 | ssl->used++; | |
43d27a72 | 2984 | |
4b4deea2 | 2985 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2986 | nbytes = SCHARS (str); |
43d27a72 | 2987 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2988 | nbytes = count_size_as_multibyte (SDATA (str), |
2989 | SBYTES (str)); | |
43d27a72 | 2990 | else |
d5db4077 | 2991 | nbytes = SBYTES (str); |
43d27a72 RS |
2992 | |
2993 | ssl->bytes += nbytes; | |
2994 | ||
cb26008f | 2995 | if (STRINGP (str2)) |
43d27a72 | 2996 | { |
4b4deea2 | 2997 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2998 | nbytes = SCHARS (str2); |
43d27a72 | 2999 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3000 | nbytes = count_size_as_multibyte (SDATA (str2), |
3001 | SBYTES (str2)); | |
43d27a72 | 3002 | else |
d5db4077 | 3003 | nbytes = SBYTES (str2); |
43d27a72 RS |
3004 | |
3005 | ssl->bytes += nbytes; | |
3006 | } | |
e8185fa8 | 3007 | } |
bbbe9545 KH |
3008 | |
3009 | /* Return the concatenation of the strings associated with overlays that | |
3010 | begin or end at POS, ignoring overlays that are specific to a window | |
3011 | other than W. The strings are concatenated in the appropriate order: | |
3012 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3013 | lower. Normally all of the after-strings come first, but zero-sized |
3014 | overlays have their after-strings ride along with the before-strings | |
3015 | because it would look strange to print them inside-out. | |
3016 | ||
3017 | Returns the string length, and stores the contents indirectly through | |
3018 | PSTR, if that variable is non-null. The string may be overwritten by | |
3019 | subsequent calls. */ | |
6b5d3b89 | 3020 | |
5816888b | 3021 | EMACS_INT |
d3da34e0 | 3022 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3023 | { |
2410d73a SM |
3024 | Lisp_Object overlay, window, str; |
3025 | struct Lisp_Overlay *ov; | |
145582a0 | 3026 | EMACS_INT startpos, endpos; |
4b4deea2 | 3027 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3028 | |
e8185fa8 KH |
3029 | overlay_heads.used = overlay_heads.bytes = 0; |
3030 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3031 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3032 | { |
2410d73a | 3033 | XSETMISC (overlay, ov); |
c2d5b10f | 3034 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3035 | |
3036 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3037 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3038 | if (endpos < pos) | |
3039 | break; | |
3040 | if (endpos != pos && startpos != pos) | |
3041 | continue; | |
3042 | window = Foverlay_get (overlay, Qwindow); | |
3043 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3044 | continue; | |
e8185fa8 KH |
3045 | if (startpos == pos |
3046 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3047 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3048 | (startpos == endpos |
3049 | ? Foverlay_get (overlay, Qafter_string) | |
3050 | : Qnil), | |
3051 | Foverlay_get (overlay, Qpriority), | |
3052 | endpos - startpos); | |
3053 | else if (endpos == pos | |
3054 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3055 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3056 | Foverlay_get (overlay, Qpriority), |
3057 | endpos - startpos); | |
bbbe9545 | 3058 | } |
2410d73a | 3059 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3060 | { |
2410d73a SM |
3061 | XSETMISC (overlay, ov); |
3062 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3063 | |
3064 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3065 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3066 | if (startpos > pos) | |
3067 | break; | |
e8185fa8 KH |
3068 | if (endpos != pos && startpos != pos) |
3069 | continue; | |
3070 | window = Foverlay_get (overlay, Qwindow); | |
3071 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3072 | continue; | |
e8185fa8 KH |
3073 | if (startpos == pos |
3074 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3075 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3076 | (startpos == endpos |
3077 | ? Foverlay_get (overlay, Qafter_string) | |
3078 | : Qnil), | |
3079 | Foverlay_get (overlay, Qpriority), | |
3080 | endpos - startpos); | |
3081 | else if (endpos == pos | |
3082 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3083 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3084 | Foverlay_get (overlay, Qpriority), |
3085 | endpos - startpos); | |
bbbe9545 | 3086 | } |
e8185fa8 KH |
3087 | if (overlay_tails.used > 1) |
3088 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3089 | cmp_for_strings); | |
3090 | if (overlay_heads.used > 1) | |
3091 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3092 | cmp_for_strings); | |
3093 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3094 | { |
e8185fa8 | 3095 | Lisp_Object tem; |
145582a0 | 3096 | EMACS_INT i; |
9f4d7cde | 3097 | unsigned char *p; |
145582a0 | 3098 | EMACS_INT total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3099 | |
3100 | if (total > overlay_str_len) | |
9f4d7cde RS |
3101 | { |
3102 | overlay_str_len = total; | |
3103 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3104 | total); | |
3105 | } | |
bbbe9545 | 3106 | p = overlay_str_buf; |
e8185fa8 | 3107 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3108 | { |
145582a0 | 3109 | EMACS_INT nbytes; |
e8185fa8 | 3110 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3111 | nbytes = copy_text (SDATA (tem), p, |
3112 | SBYTES (tem), | |
43d27a72 RS |
3113 | STRING_MULTIBYTE (tem), multibyte); |
3114 | p += nbytes; | |
bbbe9545 | 3115 | } |
e8185fa8 | 3116 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3117 | { |
145582a0 | 3118 | EMACS_INT nbytes; |
e8185fa8 | 3119 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3120 | nbytes = copy_text (SDATA (tem), p, |
3121 | SBYTES (tem), | |
43d27a72 RS |
3122 | STRING_MULTIBYTE (tem), multibyte); |
3123 | p += nbytes; | |
cb26008f KH |
3124 | tem = overlay_heads.buf[i].string2; |
3125 | if (STRINGP (tem)) | |
3126 | { | |
d5db4077 KR |
3127 | nbytes = copy_text (SDATA (tem), p, |
3128 | SBYTES (tem), | |
43d27a72 RS |
3129 | STRING_MULTIBYTE (tem), multibyte); |
3130 | p += nbytes; | |
cb26008f | 3131 | } |
bbbe9545 | 3132 | } |
cb26008f KH |
3133 | if (p != overlay_str_buf + total) |
3134 | abort (); | |
bbbe9545 KH |
3135 | if (pstr) |
3136 | *pstr = overlay_str_buf; | |
e8185fa8 | 3137 | return total; |
bbbe9545 | 3138 | } |
e8185fa8 | 3139 | return 0; |
bbbe9545 KH |
3140 | } |
3141 | \f | |
5c4f68f1 | 3142 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3143 | |
2eec3b4e | 3144 | void |
d3da34e0 | 3145 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3146 | { |
2410d73a SM |
3147 | Lisp_Object overlay, beg, end; |
3148 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3149 | |
3150 | /* See if anything in overlays_before should move to overlays_after. */ | |
3151 | ||
3152 | /* We don't strictly need prev in this loop; it should always be nil. | |
3153 | But we use it for symmetry and in case that should cease to be true | |
3154 | with some future change. */ | |
2410d73a SM |
3155 | prev = NULL; |
3156 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3157 | { |
2410d73a SM |
3158 | next = tail->next; |
3159 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3160 | |
3161 | /* If the overlay is not valid, get rid of it. */ | |
3162 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3163 | #if 1 |
3164 | abort (); | |
3165 | #else | |
2eec3b4e RS |
3166 | { |
3167 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3168 | if (!NILP (prev)) | |
7539e11f | 3169 | XCDR (prev) = next; |
2eec3b4e | 3170 | else |
5c4f68f1 | 3171 | buf->overlays_before = next; |
2eec3b4e RS |
3172 | tail = prev; |
3173 | continue; | |
3174 | } | |
52f8ec73 | 3175 | #endif |
1ab256cb | 3176 | |
2eec3b4e RS |
3177 | beg = OVERLAY_START (overlay); |
3178 | end = OVERLAY_END (overlay); | |
1ab256cb | 3179 | |
2eec3b4e | 3180 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3181 | { |
2eec3b4e | 3182 | /* OVERLAY needs to be moved. */ |
145582a0 | 3183 | EMACS_INT where = OVERLAY_POSITION (beg); |
2410d73a | 3184 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3185 | |
3186 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3187 | if (prev) |
3188 | prev->next = next; | |
2eec3b4e | 3189 | else |
5c4f68f1 | 3190 | buf->overlays_before = next; |
2eec3b4e RS |
3191 | |
3192 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3193 | other_prev = NULL; |
3194 | for (other = buf->overlays_after; other; | |
3195 | other_prev = other, other = other->next) | |
1ab256cb | 3196 | { |
6af718a4 | 3197 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3198 | |
2410d73a SM |
3199 | XSETMISC (otheroverlay, other); |
3200 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3201 | |
3202 | otherbeg = OVERLAY_START (otheroverlay); | |
3203 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3204 | break; | |
1ab256cb | 3205 | } |
2eec3b4e RS |
3206 | |
3207 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3208 | tail->next = other; |
3209 | if (other_prev) | |
3210 | other_prev->next = tail; | |
1ab256cb | 3211 | else |
5c4f68f1 | 3212 | buf->overlays_after = tail; |
2eec3b4e | 3213 | tail = prev; |
1ab256cb | 3214 | } |
2eec3b4e RS |
3215 | else |
3216 | /* We've reached the things that should stay in overlays_before. | |
3217 | All the rest of overlays_before must end even earlier, | |
3218 | so stop now. */ | |
3219 | break; | |
3220 | } | |
3221 | ||
3222 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3223 | prev = NULL; |
3224 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3225 | { |
2410d73a SM |
3226 | next = tail->next; |
3227 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3228 | |
3229 | /* If the overlay is not valid, get rid of it. */ | |
3230 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3231 | #if 1 |
3232 | abort (); | |
3233 | #else | |
2eec3b4e RS |
3234 | { |
3235 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3236 | if (!NILP (prev)) | |
7539e11f | 3237 | XCDR (prev) = next; |
2eec3b4e | 3238 | else |
5c4f68f1 | 3239 | buf->overlays_after = next; |
2eec3b4e RS |
3240 | tail = prev; |
3241 | continue; | |
3242 | } | |
52f8ec73 | 3243 | #endif |
2eec3b4e RS |
3244 | |
3245 | beg = OVERLAY_START (overlay); | |
3246 | end = OVERLAY_END (overlay); | |
3247 | ||
3248 | /* Stop looking, when we know that nothing further | |
3249 | can possibly end before POS. */ | |
3250 | if (OVERLAY_POSITION (beg) > pos) | |
3251 | break; | |
3252 | ||
3253 | if (OVERLAY_POSITION (end) <= pos) | |
3254 | { | |
3255 | /* OVERLAY needs to be moved. */ | |
145582a0 | 3256 | EMACS_INT where = OVERLAY_POSITION (end); |
2410d73a | 3257 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3258 | |
3259 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3260 | if (prev) |
3261 | prev->next = next; | |
2eec3b4e | 3262 | else |
5c4f68f1 | 3263 | buf->overlays_after = next; |
2eec3b4e RS |
3264 | |
3265 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3266 | other_prev = NULL; |
3267 | for (other = buf->overlays_before; other; | |
3268 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3269 | { |
3270 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3271 | |
2410d73a SM |
3272 | XSETMISC (otheroverlay, other); |
3273 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3274 | |
3275 | otherend = OVERLAY_END (otheroverlay); | |
3276 | if (OVERLAY_POSITION (otherend) <= where) | |
3277 | break; | |
3278 | } | |
3279 | ||
3280 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3281 | tail->next = other; |
3282 | if (other_prev) | |
3283 | other_prev->next = tail; | |
2eec3b4e | 3284 | else |
5c4f68f1 | 3285 | buf->overlays_before = tail; |
2eec3b4e RS |
3286 | tail = prev; |
3287 | } | |
3288 | } | |
3289 | ||
c2d5b10f | 3290 | buf->overlay_center = pos; |
2eec3b4e | 3291 | } |
2b1bdf65 | 3292 | |
423cdb46 | 3293 | void |
d3da34e0 | 3294 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3295 | { |
3296 | /* After an insertion, the lists are still sorted properly, | |
3297 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3298 | if (current_buffer->overlay_center >= pos) |
3299 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3300 | } |
3301 | ||
3302 | void | |
d3da34e0 | 3303 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3304 | { |
c2d5b10f | 3305 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3306 | /* The deletion was to our right. No change needed; the before- and |
3307 | after-lists are still consistent. */ | |
3308 | ; | |
c2d5b10f | 3309 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3310 | /* The deletion was to our left. We need to adjust the center value |
3311 | to account for the change in position, but the lists are consistent | |
3312 | given the new value. */ | |
c2d5b10f | 3313 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3314 | else |
3315 | /* We're right in the middle. There might be things on the after-list | |
3316 | that now belong on the before-list. Recentering will move them, | |
3317 | and also update the center point. */ | |
3318 | recenter_overlay_lists (current_buffer, pos); | |
3319 | } | |
3320 | ||
2b1bdf65 KH |
3321 | /* Fix up overlays that were garbled as a result of permuting markers |
3322 | in the range START through END. Any overlay with at least one | |
3323 | endpoint in this range will need to be unlinked from the overlay | |
3324 | list and reinserted in its proper place. | |
3325 | Such an overlay might even have negative size at this point. | |
6b61353c | 3326 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3327 | void |
145582a0 | 3328 | fix_start_end_in_overlays (register EMACS_INT start, register EMACS_INT end) |
2b1bdf65 | 3329 | { |
6af718a4 | 3330 | Lisp_Object overlay; |
5df8f01b PE |
3331 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3332 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3333 | /* These are either nil, indicating that before_list or after_list |
3334 | should be assigned, or the cons cell the cdr of which should be | |
3335 | assigned. */ | |
2410d73a | 3336 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3337 | /* 'Parent', likewise, indicates a cons cell or |
3338 | current_buffer->overlays_before or overlays_after, depending | |
3339 | which loop we're in. */ | |
2410d73a | 3340 | struct Lisp_Overlay *tail, *parent; |
145582a0 | 3341 | EMACS_INT startpos, endpos; |
2b1bdf65 KH |
3342 | |
3343 | /* This algorithm shifts links around instead of consing and GCing. | |
3344 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3345 | well-formed list except that its last element, the CDR of beforep |
3346 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3347 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3348 | that before_list isn't initialized, although it may look | |
3349 | strange. */ | |
2410d73a | 3350 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3351 | { |
2410d73a | 3352 | XSETMISC (overlay, tail); |
6b61353c | 3353 | |
2b1bdf65 | 3354 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3355 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3356 | ||
3357 | /* If the overlay is backwards, make it empty. */ | |
3358 | if (endpos < startpos) | |
3359 | { | |
3360 | startpos = endpos; | |
3361 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3362 | Qnil); | |
3363 | } | |
3364 | ||
2b1bdf65 KH |
3365 | if (endpos < start) |
3366 | break; | |
60ebfdf3 | 3367 | |
2b1bdf65 KH |
3368 | if (endpos < end |
3369 | || (startpos >= start && startpos < end)) | |
3370 | { | |
2b1bdf65 KH |
3371 | /* Add it to the end of the wrong list. Later on, |
3372 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3373 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3374 | { |
2410d73a | 3375 | if (!afterp) |
1138e742 KR |
3376 | after_list = tail; |
3377 | else | |
2410d73a | 3378 | afterp->next = tail; |
1138e742 | 3379 | afterp = tail; |
2b1bdf65 KH |
3380 | } |
3381 | else | |
3382 | { | |
2410d73a | 3383 | if (!beforep) |
1138e742 KR |
3384 | before_list = tail; |
3385 | else | |
2410d73a | 3386 | beforep->next = tail; |
1138e742 | 3387 | beforep = tail; |
2b1bdf65 | 3388 | } |
2410d73a SM |
3389 | if (!parent) |
3390 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3391 | else |
2410d73a SM |
3392 | parent->next = tail->next; |
3393 | tail = tail->next; | |
2b1bdf65 KH |
3394 | } |
3395 | else | |
2410d73a | 3396 | parent = tail, tail = parent->next; |
2b1bdf65 | 3397 | } |
2410d73a | 3398 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3399 | { |
2410d73a | 3400 | XSETMISC (overlay, tail); |
6b61353c | 3401 | |
2b1bdf65 | 3402 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3403 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3404 | ||
3405 | /* If the overlay is backwards, make it empty. */ | |
3406 | if (endpos < startpos) | |
3407 | { | |
3408 | startpos = endpos; | |
3409 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3410 | Qnil); |
6b61353c KH |
3411 | } |
3412 | ||
2b1bdf65 KH |
3413 | if (startpos >= end) |
3414 | break; | |
6b61353c | 3415 | |
2b1bdf65 KH |
3416 | if (startpos >= start |
3417 | || (endpos >= start && endpos < end)) | |
3418 | { | |
c2d5b10f | 3419 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3420 | { |
2410d73a | 3421 | if (!afterp) |
1138e742 KR |
3422 | after_list = tail; |
3423 | else | |
2410d73a | 3424 | afterp->next = tail; |
1138e742 | 3425 | afterp = tail; |
2b1bdf65 KH |
3426 | } |
3427 | else | |
3428 | { | |
2410d73a | 3429 | if (!beforep) |
1138e742 KR |
3430 | before_list = tail; |
3431 | else | |
2410d73a | 3432 | beforep->next = tail; |
1138e742 | 3433 | beforep = tail; |
2b1bdf65 | 3434 | } |
2410d73a SM |
3435 | if (!parent) |
3436 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3437 | else |
2410d73a SM |
3438 | parent->next = tail->next; |
3439 | tail = tail->next; | |
2b1bdf65 KH |
3440 | } |
3441 | else | |
2410d73a | 3442 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3443 | } |
3444 | ||
3445 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3446 | and let the recenter function make it sane again. */ | |
2410d73a | 3447 | if (beforep) |
1138e742 | 3448 | { |
2410d73a | 3449 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3450 | current_buffer->overlays_before = before_list; |
3451 | } | |
c2d5b10f | 3452 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3453 | |
2410d73a | 3454 | if (afterp) |
1138e742 | 3455 | { |
2410d73a | 3456 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3457 | current_buffer->overlays_after = after_list; |
3458 | } | |
c2d5b10f | 3459 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3460 | } |
3b06f880 KH |
3461 | |
3462 | /* We have two types of overlay: the one whose ending marker is | |
3463 | after-insertion-marker (this is the usual case) and the one whose | |
3464 | ending marker is before-insertion-marker. When `overlays_before' | |
3465 | contains overlays of the latter type and the former type in this | |
3466 | order and both overlays end at inserting position, inserting a text | |
3467 | increases only the ending marker of the latter type, which results | |
3468 | in incorrect ordering of `overlays_before'. | |
3469 | ||
3470 | This function fixes ordering of overlays in the slot | |
3471 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3472 | was at PREV, and now is at POS. */ | |
3473 | ||
01136e9b | 3474 | void |
d3da34e0 | 3475 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3476 | { |
2410d73a SM |
3477 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3478 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3479 | Lisp_Object tem; | |
5df8f01b | 3480 | EMACS_INT end IF_LINT (= 0); |
3b06f880 KH |
3481 | |
3482 | /* After the insertion, the several overlays may be in incorrect | |
3483 | order. The possibility is that, in the list `overlays_before', | |
3484 | an overlay which ends at POS appears after an overlay which ends | |
3485 | at PREV. Since POS is greater than PREV, we must fix the | |
3486 | ordering of these overlays, by moving overlays ends at POS before | |
3487 | the overlays ends at PREV. */ | |
3488 | ||
3489 | /* At first, find a place where disordered overlays should be linked | |
3490 | in. It is where an overlay which end before POS exists. (i.e. an | |
3491 | overlay whose ending marker is after-insertion-marker if disorder | |
3492 | exists). */ | |
2410d73a SM |
3493 | while (tail |
3494 | && (XSETMISC (tem, tail), | |
3495 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3496 | { |
3497 | parent = tail; | |
2410d73a | 3498 | tail = tail->next; |
1138e742 | 3499 | } |
3b06f880 KH |
3500 | |
3501 | /* If we don't find such an overlay, | |
3502 | or the found one ends before PREV, | |
3503 | or the found one is the last one in the list, | |
3504 | we don't have to fix anything. */ | |
f93ad4cf | 3505 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3506 | return; |
3507 | ||
1138e742 KR |
3508 | right_pair = parent; |
3509 | parent = tail; | |
2410d73a | 3510 | tail = tail->next; |
3b06f880 | 3511 | |
1138e742 | 3512 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3513 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3514 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3515 | we found an overlay which ends before PREV, the remaining | |
3516 | overlays are in correct order. */ | |
2410d73a | 3517 | while (tail) |
3b06f880 | 3518 | { |
2410d73a SM |
3519 | XSETMISC (tem, tail); |
3520 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3521 | |
3522 | if (end == pos) | |
3523 | { /* This overlay is disordered. */ | |
2410d73a | 3524 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3525 | |
3526 | /* Unlink the found overlay. */ | |
2410d73a SM |
3527 | tail = found->next; |
3528 | parent->next = tail; | |
1138e742 KR |
3529 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3530 | and link it into the right place. */ | |
2410d73a | 3531 | if (!right_pair) |
1138e742 | 3532 | { |
2410d73a | 3533 | found->next = bp->overlays_before; |
1138e742 KR |
3534 | bp->overlays_before = found; |
3535 | } | |
3536 | else | |
3537 | { | |
2410d73a SM |
3538 | found->next = right_pair->next; |
3539 | right_pair->next = found; | |
1138e742 | 3540 | } |
3b06f880 KH |
3541 | } |
3542 | else if (end == prev) | |
1138e742 KR |
3543 | { |
3544 | parent = tail; | |
2410d73a | 3545 | tail = tail->next; |
1138e742 | 3546 | } |
3b06f880 KH |
3547 | else /* No more disordered overlay. */ |
3548 | break; | |
3549 | } | |
3550 | } | |
2eec3b4e | 3551 | \f |
52f8ec73 | 3552 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3553 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3554 | (Lisp_Object object) |
52f8ec73 JB |
3555 | { |
3556 | return (OVERLAYP (object) ? Qt : Qnil); | |
3557 | } | |
3558 | ||
acac2700 | 3559 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3560 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3561 | If omitted, BUFFER defaults to the current buffer. |
3562 | BEG and END may be integers or markers. | |
a625ee20 RS |
3563 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3564 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3565 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3566 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3567 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3568 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3569 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3570 | { |
3571 | Lisp_Object overlay; | |
5c4f68f1 | 3572 | struct buffer *b; |
2eec3b4e | 3573 | |
5c4f68f1 | 3574 | if (NILP (buffer)) |
67180c6a | 3575 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3576 | else |
b7826503 | 3577 | CHECK_BUFFER (buffer); |
883047b9 JB |
3578 | if (MARKERP (beg) |
3579 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3580 | error ("Marker points into wrong buffer"); | |
3581 | if (MARKERP (end) | |
3582 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3583 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3584 | |
b7826503 PJ |
3585 | CHECK_NUMBER_COERCE_MARKER (beg); |
3586 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3587 | |
883047b9 | 3588 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3589 | { |
c99fc30f KH |
3590 | Lisp_Object temp; |
3591 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3592 | } |
883047b9 JB |
3593 | |
3594 | b = XBUFFER (buffer); | |
3595 | ||
3596 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3597 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3598 | |
acac2700 RS |
3599 | if (!NILP (front_advance)) |
3600 | XMARKER (beg)->insertion_type = 1; | |
3601 | if (!NILP (rear_advance)) | |
3602 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3603 | |
48e2e3ba | 3604 | overlay = allocate_misc (); |
89ca3e1b | 3605 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3606 | XOVERLAY (overlay)->start = beg; |
3607 | XOVERLAY (overlay)->end = end; | |
3608 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3609 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3610 | |
177c0ea7 | 3611 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3612 | end = OVERLAY_END (overlay); |
c2d5b10f | 3613 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3614 | { |
3615 | if (b->overlays_after) | |
3616 | XOVERLAY (overlay)->next = b->overlays_after; | |
3617 | b->overlays_after = XOVERLAY (overlay); | |
3618 | } | |
2eec3b4e | 3619 | else |
2410d73a SM |
3620 | { |
3621 | if (b->overlays_before) | |
3622 | XOVERLAY (overlay)->next = b->overlays_before; | |
3623 | b->overlays_before = XOVERLAY (overlay); | |
3624 | } | |
2eec3b4e RS |
3625 | |
3626 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3627 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3628 | |
b61982dd JB |
3629 | /* We don't need to redisplay the region covered by the overlay, because |
3630 | the overlay has no properties at the moment. */ | |
3631 | ||
2eec3b4e RS |
3632 | return overlay; |
3633 | } | |
876aa27c RS |
3634 | \f |
3635 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3636 | ||
3637 | static void | |
d3da34e0 | 3638 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3639 | { |
876aa27c RS |
3640 | if (start > end) |
3641 | { | |
145582a0 | 3642 | EMACS_INT temp = start; |
26f545d7 GM |
3643 | start = end; |
3644 | end = temp; | |
876aa27c RS |
3645 | } |
3646 | ||
481b5054 | 3647 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3648 | |
876aa27c RS |
3649 | /* If this is a buffer not in the selected window, |
3650 | we must do other windows. */ | |
3651 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3652 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3653 | /* If multiple windows show this buffer, we must do other windows. */ |
3654 | else if (buffer_shared > 1) | |
3655 | windows_or_buffers_changed = 1; | |
18700091 KS |
3656 | /* If we modify an overlay at the end of the buffer, we cannot |
3657 | be sure that window end is still valid. */ | |
3658 | else if (end >= ZV && start <= ZV) | |
3659 | windows_or_buffers_changed = 1; | |
876aa27c | 3660 | |
d8b9150f | 3661 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3662 | } |
2eec3b4e | 3663 | |
018ba359 | 3664 | \f |
2410d73a | 3665 | static struct Lisp_Overlay * |
d3da34e0 | 3666 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3667 | { |
3668 | struct Lisp_Overlay *tmp, *prev; | |
3669 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3670 | if (tmp == overlay) | |
3671 | { | |
3672 | if (prev) | |
3673 | prev->next = tmp->next; | |
3674 | else | |
3675 | list = tmp->next; | |
3676 | overlay->next = NULL; | |
3677 | break; | |
3678 | } | |
3679 | return list; | |
3680 | } | |
3681 | ||
5c4f68f1 | 3682 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3683 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3684 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3685 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3686 | buffer. */) |
5842a27b | 3687 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3688 | { |
0a4469c9 RS |
3689 | struct buffer *b, *ob; |
3690 | Lisp_Object obuffer; | |
aed13378 | 3691 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3692 | |
b7826503 | 3693 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3694 | if (NILP (buffer)) |
3695 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3696 | if (NILP (buffer)) |
67180c6a | 3697 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3698 | CHECK_BUFFER (buffer); |
883047b9 JB |
3699 | |
3700 | if (MARKERP (beg) | |
3701 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3702 | error ("Marker points into wrong buffer"); | |
3703 | if (MARKERP (end) | |
3704 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3705 | error ("Marker points into wrong buffer"); | |
3706 | ||
b7826503 PJ |
3707 | CHECK_NUMBER_COERCE_MARKER (beg); |
3708 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3709 | |
9d7608b7 KH |
3710 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3711 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3712 | |
b61982dd JB |
3713 | if (XINT (beg) > XINT (end)) |
3714 | { | |
c99fc30f KH |
3715 | Lisp_Object temp; |
3716 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3717 | } |
3718 | ||
9d7608b7 KH |
3719 | specbind (Qinhibit_quit, Qt); |
3720 | ||
0a4469c9 | 3721 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3722 | b = XBUFFER (buffer); |
8801a864 | 3723 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3724 | |
c82ed728 | 3725 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3726 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3727 | { |
3728 | /* Redisplay where the overlay was. */ | |
3729 | if (!NILP (obuffer)) | |
3730 | { | |
145582a0 EZ |
3731 | EMACS_INT o_beg; |
3732 | EMACS_INT o_end; | |
50760c4a | 3733 | |
80509f2f RS |
3734 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3735 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3736 | |
2e34157c | 3737 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3738 | } |
3739 | ||
3740 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3741 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3742 | } |
c82ed728 JB |
3743 | else |
3744 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3745 | { | |
145582a0 | 3746 | EMACS_INT o_beg, o_end; |
c82ed728 | 3747 | |
80509f2f RS |
3748 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3749 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3750 | |
2e34157c RS |
3751 | if (o_beg == XINT (beg)) |
3752 | modify_overlay (b, o_end, XINT (end)); | |
3753 | else if (o_end == XINT (end)) | |
3754 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3755 | else |
3756 | { | |
2e34157c RS |
3757 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3758 | if (XINT (end) > o_end) o_end = XINT (end); | |
3759 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3760 | } |
3761 | } | |
b61982dd | 3762 | |
0a4469c9 RS |
3763 | if (!NILP (obuffer)) |
3764 | { | |
2410d73a SM |
3765 | ob->overlays_before |
3766 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3767 | ob->overlays_after | |
3768 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3769 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3770 | } |
5c4f68f1 JB |
3771 | |
3772 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3773 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3774 | |
177c0ea7 | 3775 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3776 | end = OVERLAY_END (overlay); |
c2d5b10f | 3777 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3778 | { |
8f924df7 KH |
3779 | XOVERLAY (overlay)->next = b->overlays_after; |
3780 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3781 | } |
2eec3b4e | 3782 | else |
2410d73a | 3783 | { |
8f924df7 KH |
3784 | XOVERLAY (overlay)->next = b->overlays_before; |
3785 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3786 | } |
2eec3b4e RS |
3787 | |
3788 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3789 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3790 | |
0a4469c9 | 3791 | return unbind_to (count, overlay); |
2eec3b4e RS |
3792 | } |
3793 | ||
3794 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3795 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3796 | (Lisp_Object overlay) |
2eec3b4e | 3797 | { |
0a4469c9 | 3798 | Lisp_Object buffer; |
5c4f68f1 | 3799 | struct buffer *b; |
aed13378 | 3800 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3801 | |
b7826503 | 3802 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3803 | |
0a4469c9 RS |
3804 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3805 | if (NILP (buffer)) | |
3806 | return Qnil; | |
3807 | ||
3808 | b = XBUFFER (buffer); | |
0a4469c9 | 3809 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3810 | |
2410d73a SM |
3811 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3812 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3813 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3814 | modify_overlay (b, |
8231a9aa RS |
3815 | marker_position (OVERLAY_START (overlay)), |
3816 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3817 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3818 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3819 | ||
e58c389d | 3820 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3821 | display optimizations for the affected buffer, on the basis that |
3822 | these strings may contain newlines. This is easier to do than to | |
3823 | check for that situation during redisplay. */ | |
3824 | if (!windows_or_buffers_changed | |
3825 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3826 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3827 | b->prevent_redisplay_optimizations_p = 1; | |
3828 | ||
0a4469c9 | 3829 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3830 | } |
3831 | \f | |
8ebafa8d JB |
3832 | /* Overlay dissection functions. */ |
3833 | ||
a7ca3326 | 3834 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3835 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3836 | (Lisp_Object overlay) |
8ebafa8d | 3837 | { |
b7826503 | 3838 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3839 | |
3840 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3841 | } | |
3842 | ||
a7ca3326 | 3843 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3844 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3845 | (Lisp_Object overlay) |
8ebafa8d | 3846 | { |
b7826503 | 3847 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3848 | |
3849 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3850 | } | |
3851 | ||
3852 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3853 | doc: /* Return the buffer OVERLAY belongs to. |
3854 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3855 | (Lisp_Object overlay) |
8ebafa8d | 3856 | { |
b7826503 | 3857 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3858 | |
3859 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3860 | } | |
3861 | ||
3862 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3863 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3864 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3865 | OVERLAY. */) |
5842a27b | 3866 | (Lisp_Object overlay) |
8ebafa8d | 3867 | { |
b7826503 | 3868 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3869 | |
48e2e3ba | 3870 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3871 | } |
3872 | ||
3873 | \f | |
2eec3b4e | 3874 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3875 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3876 | (Lisp_Object pos) |
2eec3b4e RS |
3877 | { |
3878 | int noverlays; | |
2eec3b4e RS |
3879 | Lisp_Object *overlay_vec; |
3880 | int len; | |
3881 | Lisp_Object result; | |
3882 | ||
b7826503 | 3883 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3884 | |
3885 | len = 10; | |
a9800ae8 | 3886 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3887 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3888 | ||
3889 | /* Put all the overlays we want in a vector in overlay_vec. | |
3890 | Store the length in len. */ | |
2a77a7d7 | 3891 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3892 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
3893 | |
3894 | /* Make a list of them all. */ | |
3895 | result = Flist (noverlays, overlay_vec); | |
3896 | ||
9ac0d9e0 | 3897 | xfree (overlay_vec); |
2eec3b4e RS |
3898 | return result; |
3899 | } | |
3900 | ||
74514898 | 3901 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3902 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3903 | Overlap means that at least one character is contained within the overlay |
3904 | and also contained within the specified region. | |
7723e095 MR |
3905 | Empty overlays are included in the result if they are located at BEG, |
3906 | between BEG and END, or at END provided END denotes the position at the | |
3907 | end of the buffer. */) | |
5842a27b | 3908 | (Lisp_Object beg, Lisp_Object end) |
74514898 RS |
3909 | { |
3910 | int noverlays; | |
3911 | Lisp_Object *overlay_vec; | |
3912 | int len; | |
3913 | Lisp_Object result; | |
3914 | ||
b7826503 PJ |
3915 | CHECK_NUMBER_COERCE_MARKER (beg); |
3916 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3917 | |
3918 | len = 10; | |
3919 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3920 | ||
3921 | /* Put all the overlays we want in a vector in overlay_vec. | |
3922 | Store the length in len. */ | |
3923 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3924 | NULL, NULL); |
74514898 RS |
3925 | |
3926 | /* Make a list of them all. */ | |
3927 | result = Flist (noverlays, overlay_vec); | |
3928 | ||
3929 | xfree (overlay_vec); | |
3930 | return result; | |
3931 | } | |
3932 | ||
a7ca3326 | 3933 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3934 | 1, 1, 0, |
7ee72033 | 3935 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3936 | If there are no overlay boundaries from POS to (point-max), |
3937 | the value is (point-max). */) | |
5842a27b | 3938 | (Lisp_Object pos) |
2eec3b4e RS |
3939 | { |
3940 | int noverlays; | |
0f8b27ea | 3941 | EMACS_INT endpos; |
2eec3b4e RS |
3942 | Lisp_Object *overlay_vec; |
3943 | int len; | |
2eec3b4e RS |
3944 | int i; |
3945 | ||
b7826503 | 3946 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3947 | |
3948 | len = 10; | |
3949 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3950 | ||
3951 | /* Put all the overlays we want in a vector in overlay_vec. | |
3952 | Store the length in len. | |
3953 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3954 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3955 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
3956 | |
3957 | /* If any of these overlays ends before endpos, | |
3958 | use its ending point instead. */ | |
3959 | for (i = 0; i < noverlays; i++) | |
3960 | { | |
3961 | Lisp_Object oend; | |
0f8b27ea | 3962 | EMACS_INT oendpos; |
2eec3b4e RS |
3963 | |
3964 | oend = OVERLAY_END (overlay_vec[i]); | |
3965 | oendpos = OVERLAY_POSITION (oend); | |
3966 | if (oendpos < endpos) | |
3967 | endpos = oendpos; | |
1ab256cb RM |
3968 | } |
3969 | ||
9ac0d9e0 | 3970 | xfree (overlay_vec); |
2eec3b4e RS |
3971 | return make_number (endpos); |
3972 | } | |
239c932b | 3973 | |
a7ca3326 | 3974 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 3975 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 3976 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
3977 | If there are no overlay boundaries from (point-min) to POS, |
3978 | the value is (point-min). */) | |
5842a27b | 3979 | (Lisp_Object pos) |
239c932b | 3980 | { |
0f8b27ea | 3981 | EMACS_INT prevpos; |
239c932b RS |
3982 | Lisp_Object *overlay_vec; |
3983 | int len; | |
239c932b | 3984 | |
b7826503 | 3985 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3986 | |
624bbdc4 RS |
3987 | /* At beginning of buffer, we know the answer; |
3988 | avoid bug subtracting 1 below. */ | |
3989 | if (XINT (pos) == BEGV) | |
3990 | return pos; | |
3991 | ||
017f0539 GM |
3992 | len = 10; |
3993 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3994 | ||
239c932b RS |
3995 | /* Put all the overlays we want in a vector in overlay_vec. |
3996 | Store the length in len. | |
daa1c109 | 3997 | prevpos gets the position of the previous change. */ |
328ab8e7 PE |
3998 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3999 | (EMACS_INT *) 0, &prevpos, 1); | |
239c932b | 4000 | |
239c932b RS |
4001 | xfree (overlay_vec); |
4002 | return make_number (prevpos); | |
4003 | } | |
2eec3b4e RS |
4004 | \f |
4005 | /* These functions are for debugging overlays. */ | |
4006 | ||
4007 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4008 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4009 | The car has all the overlays before the overlay center; |
4010 | the cdr has all the overlays after the overlay center. | |
4011 | Recentering overlays moves overlays between these lists. | |
4012 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4013 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4014 | (void) |
2eec3b4e | 4015 | { |
2410d73a SM |
4016 | struct Lisp_Overlay *ol; |
4017 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4018 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4019 | { | |
4020 | XSETMISC (tmp, ol); | |
4021 | before = Fcons (tmp, before); | |
4022 | } | |
4023 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4024 | { | |
4025 | XSETMISC (tmp, ol); | |
4026 | after = Fcons (tmp, after); | |
4027 | } | |
4028 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4029 | } |
4030 | ||
4031 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4032 | doc: /* Recenter the overlays of the current buffer around position POS. |
4033 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4034 | for positions far away from POS). */) | |
5842a27b | 4035 | (Lisp_Object pos) |
2eec3b4e | 4036 | { |
b7826503 | 4037 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4038 | |
5c4f68f1 | 4039 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4040 | return Qnil; |
4041 | } | |
4042 | \f | |
a7ca3326 | 4043 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4044 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4045 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4046 | { |
b7826503 | 4047 | CHECK_OVERLAY (overlay); |
9a593927 | 4048 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4049 | } |
4050 | ||
4051 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 | 4052 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
5842a27b | 4053 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4054 | { |
48e2e3ba | 4055 | Lisp_Object tail, buffer; |
9d7608b7 | 4056 | int changed; |
2eec3b4e | 4057 | |
b7826503 | 4058 | CHECK_OVERLAY (overlay); |
b61982dd | 4059 | |
274a9425 RS |
4060 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4061 | ||
48e2e3ba | 4062 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4063 | CONSP (tail) && CONSP (XCDR (tail)); |
4064 | tail = XCDR (XCDR (tail))) | |
4065 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4066 | { |
7539e11f | 4067 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4068 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4069 | goto found; |
274a9425 | 4070 | } |
9d7608b7 KH |
4071 | /* It wasn't in the list, so add it to the front. */ |
4072 | changed = !NILP (value); | |
48e2e3ba KH |
4073 | XOVERLAY (overlay)->plist |
4074 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4075 | found: |
4076 | if (! NILP (buffer)) | |
4077 | { | |
4078 | if (changed) | |
876aa27c | 4079 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4080 | marker_position (OVERLAY_START (overlay)), |
4081 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4082 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4083 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4084 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4085 | Fdelete_overlay (overlay); | |
4086 | } | |
7d63db98 | 4087 | |
2eec3b4e | 4088 | return value; |
1ab256cb RM |
4089 | } |
4090 | \f | |
9115729e KH |
4091 | /* Subroutine of report_overlay_modification. */ |
4092 | ||
4093 | /* Lisp vector holding overlay hook functions to call. | |
4094 | Vector elements come in pairs. | |
4095 | Each even-index element is a list of hook functions. | |
4096 | The following odd-index element is the overlay they came from. | |
4097 | ||
4098 | Before the buffer change, we fill in this vector | |
4099 | as we call overlay hook functions. | |
4100 | After the buffer change, we get the functions to call from this vector. | |
4101 | This way we always call the same functions before and after the change. */ | |
4102 | static Lisp_Object last_overlay_modification_hooks; | |
4103 | ||
4104 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4105 | static int last_overlay_modification_hooks_used; | |
4106 | ||
4107 | /* Add one functionlist/overlay pair | |
4108 | to the end of last_overlay_modification_hooks. */ | |
4109 | ||
4110 | static void | |
d3da34e0 | 4111 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4112 | { |
77b37c05 | 4113 | int oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e KH |
4114 | |
4115 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4116 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4117 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4118 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4119 | functionlist); last_overlay_modification_hooks_used++; | |
4120 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4121 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4122 | } |
4123 | \f | |
173f2a64 RS |
4124 | /* Run the modification-hooks of overlays that include |
4125 | any part of the text in START to END. | |
9115729e KH |
4126 | If this change is an insertion, also |
4127 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4128 | and the insert-after-hooks of overlay ending at START. |
4129 | ||
4130 | This is called both before and after the modification. | |
4131 | AFTER is nonzero when we call after the modification. | |
4132 | ||
9115729e KH |
4133 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4134 | When AFTER is nonzero, they are the start position, | |
4135 | the position after the inserted new text, | |
4136 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4137 | |
4138 | void | |
d3da34e0 JB |
4139 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4140 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4141 | { |
2410d73a SM |
4142 | Lisp_Object prop, overlay; |
4143 | struct Lisp_Overlay *tail; | |
9115729e KH |
4144 | /* 1 if this change is an insertion. */ |
4145 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4146 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4147 | |
4148 | overlay = Qnil; | |
2410d73a | 4149 | tail = NULL; |
9115729e | 4150 | |
27c6b98e SM |
4151 | /* We used to run the functions as soon as we found them and only register |
4152 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4153 | case. But running elisp code as we traverse the list of overlays is | |
4154 | painful because the list can be modified by the elisp code so we had to | |
4155 | copy at several places. We now simply do a read-only traversal that | |
4156 | only collects the functions to run and we run them afterwards. It's | |
4157 | simpler, especially since all the code was already there. -stef */ | |
4158 | ||
a615c6dc | 4159 | if (!after) |
173f2a64 | 4160 | { |
a615c6dc SM |
4161 | /* We are being called before a change. |
4162 | Scan the overlays to find the functions to call. */ | |
4163 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4164 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4165 | { |
145582a0 | 4166 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4167 | Lisp_Object ostart, oend; |
4168 | ||
2410d73a | 4169 | XSETMISC (overlay, tail); |
a615c6dc SM |
4170 | |
4171 | ostart = OVERLAY_START (overlay); | |
4172 | oend = OVERLAY_END (overlay); | |
4173 | endpos = OVERLAY_POSITION (oend); | |
4174 | if (XFASTINT (start) > endpos) | |
4175 | break; | |
4176 | startpos = OVERLAY_POSITION (ostart); | |
4177 | if (insertion && (XFASTINT (start) == startpos | |
4178 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4179 | { |
a615c6dc SM |
4180 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4181 | if (!NILP (prop)) | |
4182 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4183 | } |
a615c6dc SM |
4184 | if (insertion && (XFASTINT (start) == endpos |
4185 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4186 | { |
a615c6dc SM |
4187 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4188 | if (!NILP (prop)) | |
4189 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4190 | } |
a615c6dc SM |
4191 | /* Test for intersecting intervals. This does the right thing |
4192 | for both insertion and deletion. */ | |
4193 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4194 | { |
a615c6dc SM |
4195 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4196 | if (!NILP (prop)) | |
4197 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4198 | } |
173f2a64 | 4199 | } |
60ebfdf3 | 4200 | |
2410d73a | 4201 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4202 | { |
145582a0 | 4203 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4204 | Lisp_Object ostart, oend; |
4205 | ||
2410d73a | 4206 | XSETMISC (overlay, tail); |
a615c6dc SM |
4207 | |
4208 | ostart = OVERLAY_START (overlay); | |
4209 | oend = OVERLAY_END (overlay); | |
4210 | startpos = OVERLAY_POSITION (ostart); | |
4211 | endpos = OVERLAY_POSITION (oend); | |
4212 | if (XFASTINT (end) < startpos) | |
4213 | break; | |
4214 | if (insertion && (XFASTINT (start) == startpos | |
4215 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4216 | { |
a615c6dc SM |
4217 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4218 | if (!NILP (prop)) | |
4219 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4220 | } |
a615c6dc SM |
4221 | if (insertion && (XFASTINT (start) == endpos |
4222 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4223 | { |
a615c6dc SM |
4224 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4225 | if (!NILP (prop)) | |
4226 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4227 | } |
a615c6dc SM |
4228 | /* Test for intersecting intervals. This does the right thing |
4229 | for both insertion and deletion. */ | |
4230 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4231 | { |
a615c6dc SM |
4232 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4233 | if (!NILP (prop)) | |
4234 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4235 | } |
173f2a64 RS |
4236 | } |
4237 | } | |
55b48893 | 4238 | |
a615c6dc SM |
4239 | GCPRO4 (overlay, arg1, arg2, arg3); |
4240 | { | |
4241 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4242 | First copy the vector contents, in case some of these hooks | |
4243 | do subsequent modification of the buffer. */ | |
4244 | int size = last_overlay_modification_hooks_used; | |
4245 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4246 | int i; | |
4247 | ||
72af86bd AS |
4248 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4249 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4250 | gcpro1.var = copy; |
4251 | gcpro1.nvars = size; | |
4252 | ||
4253 | for (i = 0; i < size;) | |
4254 | { | |
8f54f30a PE |
4255 | Lisp_Object prop_i, overlay_i; |
4256 | prop_i = copy[i++]; | |
4257 | overlay_i = copy[i++]; | |
4258 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4259 | } |
4260 | } | |
55b48893 | 4261 | UNGCPRO; |
173f2a64 RS |
4262 | } |
4263 | ||
4264 | static void | |
d3da34e0 JB |
4265 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4266 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4267 | { |
930a9140 | 4268 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4269 | |
930a9140 | 4270 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4271 | |
6d70a280 | 4272 | while (CONSP (list)) |
173f2a64 | 4273 | { |
930a9140 | 4274 | if (NILP (arg3)) |
6d70a280 | 4275 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4276 | else |
6d70a280 SM |
4277 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4278 | list = XCDR (list); | |
173f2a64 RS |
4279 | } |
4280 | UNGCPRO; | |
4281 | } | |
9d7608b7 KH |
4282 | |
4283 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4284 | property is set. */ | |
4285 | void | |
d3da34e0 | 4286 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4287 | { |
2410d73a SM |
4288 | Lisp_Object overlay, hit_list; |
4289 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4290 | |
4291 | hit_list = Qnil; | |
c2d5b10f | 4292 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4293 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4294 | { |
145582a0 | 4295 | EMACS_INT endpos; |
2410d73a | 4296 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4297 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4298 | if (endpos < pos) | |
4299 | break; | |
4300 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4301 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4302 | hit_list = Fcons (overlay, hit_list); |
4303 | } | |
4304 | else | |
2410d73a | 4305 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4306 | { |
145582a0 | 4307 | EMACS_INT startpos; |
2410d73a | 4308 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4309 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4310 | if (startpos > pos) | |
4311 | break; | |
4312 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4313 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4314 | hit_list = Fcons (overlay, hit_list); |
4315 | } | |
7539e11f KR |
4316 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4317 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4318 | } |
173f2a64 | 4319 | \f |
54dfdeb0 | 4320 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4321 | in the slot with offset OFFSET. */ |
4322 | ||
0fa3ba92 | 4323 | void |
d3da34e0 | 4324 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4325 | { |
ad97b375 | 4326 | Lisp_Object predicate; |
177c0ea7 | 4327 | |
64e16c3c | 4328 | switch (type) |
0fa3ba92 | 4329 | { |
2de9f71c | 4330 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4331 | case Lisp_String: predicate = Qstringp; break; |
4332 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4333 | default: abort (); | |
0fa3ba92 JB |
4334 | } |
4335 | ||
ad97b375 | 4336 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4337 | } |
7c02e886 | 4338 | |
0fa3ba92 | 4339 | \f |
b86af064 GM |
4340 | /*********************************************************************** |
4341 | Allocation with mmap | |
4342 | ***********************************************************************/ | |
4343 | ||
4344 | #ifdef USE_MMAP_FOR_BUFFERS | |
4345 | ||
4346 | #include <sys/types.h> | |
4347 | #include <sys/mman.h> | |
4348 | ||
4349 | #ifndef MAP_ANON | |
4350 | #ifdef MAP_ANONYMOUS | |
4351 | #define MAP_ANON MAP_ANONYMOUS | |
4352 | #else | |
4353 | #define MAP_ANON 0 | |
4354 | #endif | |
4355 | #endif | |
4356 | ||
09dfdf85 GM |
4357 | #ifndef MAP_FAILED |
4358 | #define MAP_FAILED ((void *) -1) | |
4359 | #endif | |
4360 | ||
b86af064 | 4361 | #include <stdio.h> |
b86af064 GM |
4362 | |
4363 | #if MAP_ANON == 0 | |
4364 | #include <fcntl.h> | |
4365 | #endif | |
4366 | ||
4367 | #include "coding.h" | |
4368 | ||
4369 | ||
4370 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4371 | The current implementation lets the system select mapped | |
4372 | addresses; we're not using MAP_FIXED in general, except when | |
4373 | trying to enlarge regions. | |
4374 | ||
4375 | Each mapped region starts with a mmap_region structure, the user | |
4376 | area starts after that structure, aligned to MEM_ALIGN. | |
4377 | ||
4378 | +-----------------------+ | |
4379 | | struct mmap_info + | | |
4380 | | padding | | |
4381 | +-----------------------+ | |
4382 | | user data | | |
4383 | | | | |
4384 | | | | |
4385 | +-----------------------+ */ | |
4386 | ||
4387 | struct mmap_region | |
4388 | { | |
4389 | /* User-specified size. */ | |
4390 | size_t nbytes_specified; | |
177c0ea7 | 4391 | |
b86af064 GM |
4392 | /* Number of bytes mapped */ |
4393 | size_t nbytes_mapped; | |
4394 | ||
4395 | /* Pointer to the location holding the address of the memory | |
4396 | allocated with the mmap'd block. The variable actually points | |
4397 | after this structure. */ | |
4398 | POINTER_TYPE **var; | |
4399 | ||
4400 | /* Next and previous in list of all mmap'd regions. */ | |
4401 | struct mmap_region *next, *prev; | |
4402 | }; | |
4403 | ||
4404 | /* Doubly-linked list of mmap'd regions. */ | |
4405 | ||
4406 | static struct mmap_region *mmap_regions; | |
4407 | ||
4408 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4409 | /dev/zero will be opened on it. */ | |
4410 | ||
4411 | static int mmap_fd; | |
4412 | ||
4413 | /* Temporary storage for mmap_set_vars, see there. */ | |
4414 | ||
4415 | static struct mmap_region *mmap_regions_1; | |
4416 | static int mmap_fd_1; | |
4417 | ||
4418 | /* Page size on this system. */ | |
4419 | ||
4420 | static int mmap_page_size; | |
4421 | ||
4422 | /* 1 means mmap has been intialized. */ | |
4423 | ||
4424 | static int mmap_initialized_p; | |
4425 | ||
4426 | /* Value is X rounded up to the next multiple of N. */ | |
4427 | ||
4428 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4429 | ||
4430 | /* Size of mmap_region structure plus padding. */ | |
4431 | ||
4432 | #define MMAP_REGION_STRUCT_SIZE \ | |
4433 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4434 | ||
4435 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4436 | region, return a pointer to the start of the region. */ | |
4437 | ||
4438 | #define MMAP_REGION(P) \ | |
4439 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4440 | ||
4441 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4442 | to the start of the user-visible part of the region. */ | |
4443 | ||
4444 | #define MMAP_USER_AREA(P) \ | |
4445 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4446 | ||
4447 | #define MEM_ALIGN sizeof (double) | |
4448 | ||
7273faa1 DL |
4449 | /* Predicate returning true if part of the address range [START .. END] |
4450 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4451 | memory mapping. |
4452 | ||
4453 | Default is to conservativly assume the address range is occupied by | |
4454 | something else. This can be overridden by system configuration | |
4455 | files if system-specific means to determine this exists. */ | |
4456 | ||
4457 | #ifndef MMAP_ALLOCATED_P | |
4458 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4459 | #endif | |
4460 | ||
b86af064 GM |
4461 | /* Function prototypes. */ |
4462 | ||
f57e2426 J |
4463 | static int mmap_free_1 (struct mmap_region *); |
4464 | static int mmap_enlarge (struct mmap_region *, int); | |
4465 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4466 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4467 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4468 | static void mmap_free (POINTER_TYPE **ptr); | |
4469 | static void mmap_init (void); | |
b86af064 GM |
4470 | |
4471 | ||
4472 | /* Return a region overlapping address range START...END, or null if | |
4473 | none. END is not including, i.e. the last byte in the range | |
4474 | is at END - 1. */ | |
4475 | ||
4476 | static struct mmap_region * | |
4477 | mmap_find (start, end) | |
4478 | POINTER_TYPE *start, *end; | |
4479 | { | |
4480 | struct mmap_region *r; | |
4481 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4482 | |
b86af064 GM |
4483 | for (r = mmap_regions; r; r = r->next) |
4484 | { | |
4485 | char *rstart = (char *) r; | |
4486 | char *rend = rstart + r->nbytes_mapped; | |
4487 | ||
4488 | if (/* First byte of range, i.e. START, in this region? */ | |
4489 | (s >= rstart && s < rend) | |
4490 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4491 | || (e > rstart && e <= rend) | |
4492 | /* First byte of this region in the range? */ | |
4493 | || (rstart >= s && rstart < e) | |
4494 | /* Last byte of this region in the range? */ | |
4495 | || (rend > s && rend <= e)) | |
4496 | break; | |
4497 | } | |
4498 | ||
4499 | return r; | |
4500 | } | |
4501 | ||
4502 | ||
4503 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4504 | the region. Value is non-zero if successful. */ | |
4505 | ||
4506 | static int | |
4507 | mmap_free_1 (r) | |
4508 | struct mmap_region *r; | |
4509 | { | |
4510 | if (r->next) | |
4511 | r->next->prev = r->prev; | |
4512 | if (r->prev) | |
4513 | r->prev->next = r->next; | |
4514 | else | |
4515 | mmap_regions = r->next; | |
177c0ea7 | 4516 | |
1a15cca0 | 4517 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4518 | { |
4519 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4520 | return 0; | |
4521 | } | |
4522 | ||
4523 | return 1; | |
4524 | } | |
4525 | ||
4526 | ||
4527 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4528 | Value is non-zero if successful. */ | |
4529 | ||
4530 | static int | |
4531 | mmap_enlarge (r, npages) | |
4532 | struct mmap_region *r; | |
4533 | int npages; | |
4534 | { | |
4535 | char *region_end = (char *) r + r->nbytes_mapped; | |
4536 | size_t nbytes; | |
4537 | int success = 0; | |
4538 | ||
4539 | if (npages < 0) | |
4540 | { | |
4541 | /* Unmap pages at the end of the region. */ | |
4542 | nbytes = - npages * mmap_page_size; | |
4543 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4544 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4545 | else | |
4546 | { | |
4547 | r->nbytes_mapped -= nbytes; | |
4548 | success = 1; | |
4549 | } | |
4550 | } | |
4551 | else if (npages > 0) | |
4552 | { | |
b86af064 | 4553 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4554 | |
b86af064 GM |
4555 | /* Try to map additional pages at the end of the region. We |
4556 | cannot do this if the address range is already occupied by | |
4557 | something else because mmap deletes any previous mapping. | |
4558 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4559 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4560 | { |
4561 | POINTER_TYPE *p; | |
177c0ea7 | 4562 | |
b86af064 GM |
4563 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4564 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4565 | if (p == MAP_FAILED) | |
edaa9aed | 4566 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4567 | else if (p != (POINTER_TYPE *) region_end) |
4568 | { | |
4569 | /* Kernels are free to choose a different address. In | |
4570 | that case, unmap what we've mapped above; we have | |
4571 | no use for it. */ | |
4572 | if (munmap (p, nbytes) == -1) | |
4573 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4574 | } | |
4575 | else | |
4576 | { | |
4577 | r->nbytes_mapped += nbytes; | |
4578 | success = 1; | |
4579 | } | |
4580 | } | |
4581 | } | |
4582 | ||
4583 | return success; | |
4584 | } | |
4585 | ||
4586 | ||
4587 | /* Set or reset variables holding references to mapped regions. If | |
4588 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4589 | non-zero, set all variables to the start of the user-areas | |
4590 | of mapped regions. | |
4591 | ||
4592 | This function is called from Fdump_emacs to ensure that the dumped | |
4593 | Emacs doesn't contain references to memory that won't be mapped | |
4594 | when Emacs starts. */ | |
4595 | ||
4596 | void | |
4597 | mmap_set_vars (restore_p) | |
4598 | int restore_p; | |
4599 | { | |
4600 | struct mmap_region *r; | |
4601 | ||
4602 | if (restore_p) | |
4603 | { | |
4604 | mmap_regions = mmap_regions_1; | |
4605 | mmap_fd = mmap_fd_1; | |
4606 | for (r = mmap_regions; r; r = r->next) | |
4607 | *r->var = MMAP_USER_AREA (r); | |
4608 | } | |
4609 | else | |
4610 | { | |
4611 | for (r = mmap_regions; r; r = r->next) | |
4612 | *r->var = NULL; | |
4613 | mmap_regions_1 = mmap_regions; | |
4614 | mmap_regions = NULL; | |
4615 | mmap_fd_1 = mmap_fd; | |
4616 | mmap_fd = -1; | |
4617 | } | |
4618 | } | |
4619 | ||
4620 | ||
4621 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4622 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4623 | address of some variable which will use the data area. | |
4624 | ||
4625 | The allocation of 0 bytes is valid. | |
4626 | ||
4627 | If we can't allocate the necessary memory, set *VAR to null, and | |
4628 | return null. */ | |
4629 | ||
4630 | static POINTER_TYPE * | |
4631 | mmap_alloc (var, nbytes) | |
4632 | POINTER_TYPE **var; | |
4633 | size_t nbytes; | |
4634 | { | |
4635 | void *p; | |
4636 | size_t map; | |
4637 | ||
4638 | mmap_init (); | |
4639 | ||
4640 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4641 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4642 | mmap_fd, 0); | |
177c0ea7 | 4643 | |
b86af064 GM |
4644 | if (p == MAP_FAILED) |
4645 | { | |
4646 | if (errno != ENOMEM) | |
4647 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4648 | p = NULL; | |
4649 | } | |
4650 | else | |
4651 | { | |
4652 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4653 | |
b86af064 GM |
4654 | r->nbytes_specified = nbytes; |
4655 | r->nbytes_mapped = map; | |
4656 | r->var = var; | |
4657 | r->prev = NULL; | |
4658 | r->next = mmap_regions; | |
4659 | if (r->next) | |
4660 | r->next->prev = r; | |
4661 | mmap_regions = r; | |
177c0ea7 | 4662 | |
b86af064 GM |
4663 | p = MMAP_USER_AREA (p); |
4664 | } | |
177c0ea7 | 4665 | |
b86af064 GM |
4666 | return *var = p; |
4667 | } | |
4668 | ||
4669 | ||
4670 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4671 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4672 | and return this value. If more memory cannot be allocated, then | |
4673 | leave *VAR unchanged, and return null. */ | |
4674 | ||
4675 | static POINTER_TYPE * | |
4676 | mmap_realloc (var, nbytes) | |
4677 | POINTER_TYPE **var; | |
4678 | size_t nbytes; | |
4679 | { | |
4680 | POINTER_TYPE *result; | |
177c0ea7 | 4681 | |
b86af064 GM |
4682 | mmap_init (); |
4683 | ||
4684 | if (*var == NULL) | |
4685 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4686 | else if (nbytes == 0) |
b86af064 GM |
4687 | { |
4688 | mmap_free (var); | |
4689 | result = mmap_alloc (var, nbytes); | |
4690 | } | |
4691 | else | |
4692 | { | |
4693 | struct mmap_region *r = MMAP_REGION (*var); | |
4694 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4695 | |
b86af064 GM |
4696 | if (room < nbytes) |
4697 | { | |
4698 | /* Must enlarge. */ | |
4699 | POINTER_TYPE *old_ptr = *var; | |
4700 | ||
4701 | /* Try to map additional pages at the end of the region. | |
4702 | If that fails, allocate a new region, copy data | |
4703 | from the old region, then free it. */ | |
4704 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4705 | / mmap_page_size))) | |
4706 | { | |
4707 | r->nbytes_specified = nbytes; | |
4708 | *var = result = old_ptr; | |
4709 | } | |
4710 | else if (mmap_alloc (var, nbytes)) | |
4711 | { | |
72af86bd | 4712 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4713 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4714 | result = *var; | |
4715 | r = MMAP_REGION (result); | |
4716 | r->nbytes_specified = nbytes; | |
4717 | } | |
4718 | else | |
4719 | { | |
4720 | *var = old_ptr; | |
4721 | result = NULL; | |
4722 | } | |
4723 | } | |
4724 | else if (room - nbytes >= mmap_page_size) | |
4725 | { | |
4726 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4727 | memory back to the system. |
4728 | ||
4729 | The extra parens are to make the division happens first, | |
4730 | on positive values, so we know it will round towards | |
4731 | zero. */ | |
bb63c5c9 | 4732 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4733 | result = *var; |
4734 | r->nbytes_specified = nbytes; | |
4735 | } | |
4736 | else | |
4737 | { | |
4738 | /* Leave it alone. */ | |
4739 | result = *var; | |
4740 | r->nbytes_specified = nbytes; | |
4741 | } | |
4742 | } | |
4743 | ||
4744 | return result; | |
4745 | } | |
4746 | ||
4747 | ||
4748 | /* Free a block of relocatable storage whose data is pointed to by | |
4749 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4750 | ||
4751 | static void | |
4752 | mmap_free (var) | |
4753 | POINTER_TYPE **var; | |
4754 | { | |
4755 | mmap_init (); | |
177c0ea7 | 4756 | |
b86af064 GM |
4757 | if (*var) |
4758 | { | |
4759 | mmap_free_1 (MMAP_REGION (*var)); | |
4760 | *var = NULL; | |
4761 | } | |
4762 | } | |
4763 | ||
4764 | ||
4765 | /* Perform necessary intializations for the use of mmap. */ | |
4766 | ||
4767 | static void | |
4768 | mmap_init () | |
4769 | { | |
4770 | #if MAP_ANON == 0 | |
4771 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4772 | in a dumped Emacs. */ | |
4773 | if (mmap_fd <= 0) | |
4774 | { | |
4775 | /* No anonymous mmap -- we need the file descriptor. */ | |
4776 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4777 | if (mmap_fd == -1) | |
4778 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4779 | } | |
4780 | #endif /* MAP_ANON == 0 */ | |
4781 | ||
4782 | if (mmap_initialized_p) | |
4783 | return; | |
4784 | mmap_initialized_p = 1; | |
177c0ea7 | 4785 | |
b86af064 GM |
4786 | #if MAP_ANON != 0 |
4787 | mmap_fd = -1; | |
4788 | #endif | |
177c0ea7 | 4789 | |
b86af064 GM |
4790 | mmap_page_size = getpagesize (); |
4791 | } | |
4792 | ||
4793 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4794 | ||
4795 | ||
4796 | \f | |
4797 | /*********************************************************************** | |
4798 | Buffer-text Allocation | |
4799 | ***********************************************************************/ | |
4800 | ||
4801 | #ifdef REL_ALLOC | |
f57e2426 J |
4802 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4803 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4804 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4805 | #endif /* REL_ALLOC */ |
4806 | ||
4807 | ||
4808 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4809 | ||
4810 | static void | |
d3da34e0 | 4811 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4812 | { |
4813 | POINTER_TYPE *p; | |
177c0ea7 | 4814 | |
b86af064 GM |
4815 | BLOCK_INPUT; |
4816 | #if defined USE_MMAP_FOR_BUFFERS | |
4817 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4818 | #elif defined REL_ALLOC | |
4819 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4820 | #else | |
815add84 | 4821 | p = xmalloc (nbytes); |
b86af064 | 4822 | #endif |
177c0ea7 | 4823 | |
b86af064 GM |
4824 | if (p == NULL) |
4825 | { | |
4826 | UNBLOCK_INPUT; | |
531b0165 | 4827 | memory_full (nbytes); |
b86af064 GM |
4828 | } |
4829 | ||
4830 | b->text->beg = (unsigned char *) p; | |
4831 | UNBLOCK_INPUT; | |
4832 | } | |
4833 | ||
4834 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4835 | shrink it. */ | |
4836 | ||
4837 | void | |
5371d722 | 4838 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4839 | { |
4840 | POINTER_TYPE *p; | |
4841 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4842 | + delta); | |
4843 | BLOCK_INPUT; | |
4844 | #if defined USE_MMAP_FOR_BUFFERS | |
4845 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4846 | #elif defined REL_ALLOC | |
4847 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4848 | #else | |
4849 | p = xrealloc (b->text->beg, nbytes); | |
4850 | #endif | |
177c0ea7 | 4851 | |
b86af064 GM |
4852 | if (p == NULL) |
4853 | { | |
4854 | UNBLOCK_INPUT; | |
531b0165 | 4855 | memory_full (nbytes); |
b86af064 GM |
4856 | } |
4857 | ||
4858 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4859 | UNBLOCK_INPUT; | |
4860 | } | |
4861 | ||
4862 | ||
4863 | /* Free buffer B's text buffer. */ | |
4864 | ||
4865 | static void | |
d3da34e0 | 4866 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4867 | { |
4868 | BLOCK_INPUT; | |
4869 | ||
4870 | #if defined USE_MMAP_FOR_BUFFERS | |
4871 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4872 | #elif defined REL_ALLOC | |
4873 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4874 | #else | |
4875 | xfree (b->text->beg); | |
4876 | #endif | |
177c0ea7 | 4877 | |
b86af064 GM |
4878 | BUF_BEG_ADDR (b) = NULL; |
4879 | UNBLOCK_INPUT; | |
4880 | } | |
4881 | ||
4882 | ||
4883 | \f | |
4884 | /*********************************************************************** | |
4885 | Initialization | |
4886 | ***********************************************************************/ | |
4887 | ||
dfcf069d | 4888 | void |
d3da34e0 | 4889 | init_buffer_once (void) |
1ab256cb | 4890 | { |
7c02e886 GM |
4891 | int idx; |
4892 | ||
72af86bd | 4893 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4894 | |
1ab256cb RM |
4895 | /* Make sure all markable slots in buffer_defaults |
4896 | are initialized reasonably, so mark_buffer won't choke. */ | |
4897 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4898 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4899 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4900 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4901 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4902 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4903 | /* Prevent GC from getting confused. */ |
4904 | buffer_defaults.text = &buffer_defaults.own_text; | |
4905 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4906 | BUF_INTERVALS (&buffer_defaults) = 0; |
4907 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
eab3844f | 4908 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, 0); |
67180c6a | 4909 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
eab3844f | 4910 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, 0); |
67180c6a | 4911 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4912 | |
4913 | /* Set up the default values of various buffer slots. */ | |
4914 | /* Must do these before making the first buffer! */ | |
4915 | ||
f532dca0 | 4916 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4917 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4918 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4919 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4920 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4921 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4922 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4923 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 4924 | #ifndef old |
4b4deea2 | 4925 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 4926 | #endif |
4b4deea2 TT |
4927 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4928 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4929 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4930 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4931 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4932 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4933 | buffer_defaults.overlays_before = NULL; |
4934 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4935 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4936 | |
4b4deea2 TT |
4937 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4938 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4939 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4940 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4941 | BVAR (&buffer_defaults, bidi_display_reordering) = Qnil; | |
4942 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; | |
4943 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4944 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4945 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4946 | |
4b4deea2 TT |
4947 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4948 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4949 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4950 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4951 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4952 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4953 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4954 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4955 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4956 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4957 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4958 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4959 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4960 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4961 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4962 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4963 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4964 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4965 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4966 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4967 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4968 | |
4969 | /* Assign the local-flags to the slots that have default values. | |
4970 | The local flag is a bit that is used in the buffer | |
4971 | to say that it has its own local value for the slot. | |
4972 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4973 | ||
4974 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 4975 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
4976 | |
4977 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4978 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4979 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4980 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4981 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4982 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4983 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4984 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4985 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4986 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
4987 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
4988 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
4989 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
4990 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
4991 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
4992 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
4993 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
4994 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
4995 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
4996 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 4997 | |
7c02e886 | 4998 | idx = 1; |
4b4deea2 TT |
4999 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
5000 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
5001 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
5002 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
5003 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
5004 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 5005 | #ifndef old |
4b4deea2 | 5006 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
54ad07d3 | 5007 | #endif |
4b4deea2 TT |
5008 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
5009 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
5010 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
5011 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
5014 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
5016 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
5017 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
5018 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
5019 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
5020 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
5021 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 5022 | /* Make this one a permanent local. */ |
7c02e886 | 5023 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
5024 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5025 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5026 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5027 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5028 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5029 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5030 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5031 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5032 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5033 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5034 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5035 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5036 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5037 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5038 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5039 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5040 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5041 | |
5042 | /* Need more room? */ | |
7313acd0 | 5043 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5044 | abort (); |
7313acd0 | 5045 | last_per_buffer_idx = idx; |
177c0ea7 | 5046 | |
1ab256cb RM |
5047 | Vbuffer_alist = Qnil; |
5048 | current_buffer = 0; | |
5049 | all_buffers = 0; | |
5050 | ||
f4265f6c | 5051 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5052 | |
d67b4f80 | 5053 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5054 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5055 | |
d67b4f80 | 5056 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5057 | |
d67b4f80 | 5058 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5059 | |
d67b4f80 | 5060 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5061 | |
d67b4f80 | 5062 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5063 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5064 | |
d67b4f80 | 5065 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5066 | |
1ab256cb | 5067 | /* super-magic invisible buffer */ |
d67b4f80 | 5068 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5069 | Vbuffer_alist = Qnil; |
5070 | ||
d67b4f80 | 5071 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5072 | |
5073 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5074 | } |
5075 | ||
dfcf069d | 5076 | void |
d3da34e0 | 5077 | init_buffer (void) |
1ab256cb | 5078 | { |
2381d133 | 5079 | char *pwd; |
136351b7 | 5080 | Lisp_Object temp; |
b639c9be | 5081 | int len; |
1ab256cb | 5082 | |
b86af064 | 5083 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5084 | { |
5085 | /* When using the ralloc implementation based on mmap(2), buffer | |
5086 | text pointers will have been set to null in the dumped Emacs. | |
5087 | Map new memory. */ | |
5088 | struct buffer *b; | |
177c0ea7 | 5089 | |
f61f41d7 | 5090 | for (b = all_buffers; b; b = b->header.next.buffer) |
93c27ef1 | 5091 | if (b->text->beg == NULL) |
b86af064 | 5092 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5093 | } |
b86af064 | 5094 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5095 | |
1ab256cb | 5096 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5097 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5098 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5099 | |
01537133 | 5100 | pwd = get_current_dir_name (); |
a17b5ed1 | 5101 | |
156bdb41 | 5102 | if (!pwd) |
a17b5ed1 | 5103 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5104 | |
1ab256cb RM |
5105 | /* Maybe this should really use some standard subroutine |
5106 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5107 | len = strlen (pwd); |
5108 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5109 | { |
156bdb41 | 5110 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5111 | pwd = (char *) realloc (pwd, len + 2); |
5112 | if (!pwd) | |
5113 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5114 | pwd[len] = DIRECTORY_SEP; |
5115 | pwd[len + 1] = '\0'; | |
f7975d07 | 5116 | } |
0995fa35 | 5117 | |
4b4deea2 TT |
5118 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5119 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5120 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5121 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5122 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5123 | BVAR (current_buffer, directory) |
5124 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5125 | |
0995fa35 RS |
5126 | /* Add /: to the front of the name |
5127 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5128 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5129 | if (! NILP (temp) |
5130 | /* If the default dir is just /, TEMP is non-nil | |
5131 | because of the ange-ftp completion handler. | |
5132 | However, it is not necessary to turn / into /:/. | |
5133 | So avoid doing that. */ | |
4b4deea2 TT |
5134 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5135 | BVAR (current_buffer, directory) | |
5136 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5137 | |
136351b7 | 5138 | temp = get_minibuffer (0); |
4b4deea2 | 5139 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5140 | |
5141 | free (pwd); | |
1ab256cb RM |
5142 | } |
5143 | ||
d6aa1876 SM |
5144 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5145 | Object stored in the current buffer. address is the address of the slot | |
5146 | in the buffer that is current now. */ | |
5147 | ||
5148 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5149 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5150 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5151 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5152 | VNAME is the name of the buffer slot. |
5153 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5154 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5155 | do { \ | |
5156 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5157 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5158 | } while (0) |
d6aa1876 SM |
5159 | |
5160 | static void | |
8ea90aa3 | 5161 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5162 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5163 | { |
ce5b453a | 5164 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5165 | int offset; |
5166 | ||
ce5b453a | 5167 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5168 | offset = (char *)address - (char *)current_buffer; |
5169 | ||
ce5b453a SM |
5170 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5171 | bo_fwd->offset = offset; | |
5172 | bo_fwd->slottype = type; | |
b9598260 | 5173 | sym->declared_special = 1; |
ce5b453a SM |
5174 | sym->redirect = SYMBOL_FORWARDED; |
5175 | { | |
5176 | /* I tried to do the job without a cast, but it seems impossible. | |
5177 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5178 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5179 | } | |
5180 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5181 | |
5182 | if (PER_BUFFER_IDX (offset) == 0) | |
5183 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5184 | slot of buffer_local_flags */ | |
5185 | abort (); | |
5186 | } | |
5187 | ||
5188 | ||
1ab256cb | 5189 | /* initialize the buffer routines */ |
dfcf069d | 5190 | void |
d3da34e0 | 5191 | syms_of_buffer (void) |
1ab256cb | 5192 | { |
9115729e KH |
5193 | staticpro (&last_overlay_modification_hooks); |
5194 | last_overlay_modification_hooks | |
5195 | = Fmake_vector (make_number (10), Qnil); | |
5196 | ||
1ab256cb RM |
5197 | staticpro (&Vbuffer_defaults); |
5198 | staticpro (&Vbuffer_local_symbols); | |
5199 | staticpro (&Qfundamental_mode); | |
5200 | staticpro (&Qmode_class); | |
5201 | staticpro (&QSFundamental); | |
5202 | staticpro (&Vbuffer_alist); | |
5203 | staticpro (&Qprotected_field); | |
5204 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5205 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5206 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5207 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5208 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5209 | staticpro (&Qoverlayp); |
d67b4f80 | 5210 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5211 | staticpro (&Qevaporate); |
d67b4f80 | 5212 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5213 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5214 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5215 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5216 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5217 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5218 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5219 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5220 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5221 | staticpro (&Qpriority); |
d67b4f80 | 5222 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5223 | staticpro (&Qbefore_string); |
d67b4f80 | 5224 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5225 | staticpro (&Qafter_string); |
d67b4f80 | 5226 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5227 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5228 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5229 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5230 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5231 | staticpro (&Qafter_change_functions); |
2f7a359d | 5232 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5233 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5234 | |
d67b4f80 | 5235 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5236 | staticpro (&Qkill_buffer_query_functions); |
5237 | ||
1ab256cb | 5238 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5239 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5240 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5241 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5242 | |
422745d0 TT |
5243 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5244 | mode_line_format, | |
5245 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5246 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5247 | |
422745d0 TT |
5248 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5249 | header_line_format, | |
5250 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5251 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5252 | |
422745d0 TT |
5253 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5254 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5255 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5256 | |
422745d0 TT |
5257 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5258 | extra_line_spacing, | |
5259 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5260 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5261 | |
422745d0 TT |
5262 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5263 | cursor_in_non_selected_windows, | |
5264 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5265 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5266 | ||
422745d0 TT |
5267 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5268 | abbrev_mode, | |
5269 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5270 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5271 | |
422745d0 TT |
5272 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5273 | ctl_arrow, | |
5274 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5275 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5276 | |
422745d0 TT |
5277 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5278 | enable_multibyte_characters, | |
5279 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5280 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5281 | |
422745d0 TT |
5282 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5283 | buffer_file_coding_system, | |
5284 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5285 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5286 | |
422745d0 TT |
5287 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5288 | truncate_lines, | |
5289 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5290 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5291 | |
422745d0 TT |
5292 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5293 | fill_column, | |
5294 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5295 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5296 | |
422745d0 TT |
5297 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5298 | left_margin, | |
5299 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5300 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5301 | |
422745d0 TT |
5302 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5303 | tab_width, | |
5304 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5305 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5306 | |
422745d0 TT |
5307 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5308 | case_fold_search, | |
5309 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5310 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5311 | |
422745d0 TT |
5312 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5313 | left_margin_cols, | |
5314 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5315 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5316 | |
422745d0 TT |
5317 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5318 | right_margin_cols, | |
5319 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5320 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5321 | |
422745d0 TT |
5322 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5323 | left_fringe_width, | |
5324 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5325 | This is the same as (default-value 'left-fringe-width). */); |
5326 | ||
422745d0 TT |
5327 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5328 | right_fringe_width, | |
5329 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5330 | This is the same as (default-value 'right-fringe-width). */); |
5331 | ||
422745d0 TT |
5332 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5333 | fringes_outside_margins, | |
5334 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5335 | This is the same as (default-value 'fringes-outside-margins). */); |
5336 | ||
422745d0 TT |
5337 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5338 | scroll_bar_width, | |
5339 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5340 | This is the same as (default-value 'scroll-bar-width). */); |
5341 | ||
422745d0 TT |
5342 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5343 | vertical_scroll_bar_type, | |
5344 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5345 | This is the same as (default-value 'vertical-scroll-bar). */); |
5346 | ||
422745d0 TT |
5347 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5348 | indicate_empty_lines, | |
5349 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5350 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5351 | |
422745d0 TT |
5352 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5353 | indicate_buffer_boundaries, | |
5354 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5355 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5356 | ||
422745d0 TT |
5357 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5358 | fringe_indicator_alist, | |
5359 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5360 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5361 | ||
422745d0 TT |
5362 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5363 | fringe_cursor_alist, | |
5364 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5365 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5366 | ||
422745d0 TT |
5367 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5368 | scroll_up_aggressively, | |
5369 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5370 | This value applies in buffers that don't have their own local values. |
fc961256 | 5371 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5372 | |
422745d0 TT |
5373 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5374 | scroll_down_aggressively, | |
5375 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5376 | This value applies in buffers that don't have their own local values. |
fc961256 | 5377 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5378 | |
045dee35 | 5379 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5380 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5381 | Qnil, |
7614d762 RS |
5382 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5383 | The header line appears, optionally, at the top of a window; | |
5384 | the mode line appears at the bottom. */); | |
177c0ea7 | 5385 | |
4b4deea2 | 5386 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5387 | Qnil, |
5388 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5389 | Each buffer has its own value of this variable. |
5390 | Value may be nil, a string, a symbol or a list or cons cell. | |
5391 | A value of nil means don't display a mode line. | |
5392 | For a symbol, its value is used (but it is ignored if t or nil). | |
5393 | A string appearing directly as the value of a symbol is processed verbatim | |
5394 | in that the %-constructs below are not recognized. | |
ed463255 | 5395 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5396 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5397 | in the value of that symbol will be ignored. |
018ba359 | 5398 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5399 | is used as a mode line element. Be careful--FORM should not load any files, |
5400 | because that can cause an infinite recursion. | |
ed463255 KS |
5401 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5402 | with the specified properties PROPS applied. | |
018ba359 PJ |
5403 | For a list whose car is a symbol, the symbol's value is taken, |
5404 | and if that is non-nil, the cadr of the list is processed recursively. | |
5405 | Otherwise, the caddr of the list (if there is one) is processed. | |
5406 | For a list whose car is a string or list, each element is processed | |
5407 | recursively and the results are effectively concatenated. | |
5408 | For a list whose car is an integer, the cdr of the list is processed | |
5409 | and padded (if the number is positive) or truncated (if negative) | |
5410 | to the width specified by that number. | |
5411 | A string is printed verbatim in the mode line except for %-constructs: | |
5412 | (%-constructs are allowed when the string is the entire mode-line-format | |
5413 | or when it is found in a cons-cell or a list) | |
5414 | %b -- print buffer name. %f -- print visited file name. | |
5415 | %F -- print frame name. | |
5416 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5417 | %& is like %*, but ignore read-only-ness. | |
5418 | % means buffer is read-only and * means it is modified. | |
5419 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5420 | %s -- print process status. %l -- print the current line number. | |
5421 | %c -- print the current column number (this makes editing slower). | |
5422 | To make the column number update correctly in all cases, | |
5423 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5424 | %i -- print the size of the buffer. |
5425 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5426 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5427 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5428 | or print Bottom or All. | |
018ba359 | 5429 | %n -- print Narrow if appropriate. |
dafbe726 | 5430 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5431 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5432 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5433 | %e -- print error message about full memory. |
f7165034 NR |
5434 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5435 | remote machine. | |
018ba359 PJ |
5436 | %[ -- print one [ for each recursive editing level. %] similar. |
5437 | %% -- print %. %- -- print infinitely many dashes. | |
5438 | Decimal digits after the % specify field width to which to pad. */); | |
5439 | ||
422745d0 TT |
5440 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
5441 | doc: /* *Value of `major-mode' for new buffers. */); | |
1ab256cb | 5442 | |
4b4deea2 | 5443 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5444 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5445 | doc: /* Symbol for current buffer's major mode. |
5446 | The default value (normally `fundamental-mode') affects new buffers. | |
5447 | A value of nil means to use the current buffer's major mode, provided | |
5448 | it is not marked as "special". | |
5449 | ||
5450 | When a mode is used by default, `find-file' switches to it before it | |
5451 | reads the contents into the buffer and before it finishes setting up | |
5452 | the buffer. Thus, the mode and its hooks should not expect certain | |
5453 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5454 | to be set up. */); | |
1ab256cb | 5455 | |
4b4deea2 | 5456 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5457 | Qnil, |
64a7c220 | 5458 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5459 | Usually a string, but can use any of the constructs for `mode-line-format', |
5460 | which see. | |
5461 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5462 | |
4b4deea2 | 5463 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5464 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5465 | ||
4b4deea2 | 5466 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5467 | doc: /* Non-nil if Abbrev mode is enabled. |
5468 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5469 | |
4b4deea2 | 5470 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5471 | Qnil, |
efc7e75f | 5472 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5473 | |
4b4deea2 | 5474 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5475 | make_number (LISP_INT_TAG), |
1ac5826d | 5476 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5477 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5478 | |
4b4deea2 | 5479 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5480 | make_number (LISP_INT_TAG), |
fc961256 | 5481 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5482 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5483 | |
4b4deea2 | 5484 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5485 | make_number (LISP_INT_TAG), |
fde4eb86 CY |
5486 | doc: /* *Distance between tab stops (for display of tab characters), in columns. |
5487 | This should be an integer greater than zero. */); | |
1ab256cb | 5488 | |
4b4deea2 | 5489 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
efc7e75f | 5490 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5491 | A value of nil means use backslash and octal digits. |
5492 | This variable does not apply to characters whose display is specified | |
5493 | in the current display table (if there is one). */); | |
1ab256cb | 5494 | |
3b06f880 | 5495 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5496 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5497 | Qnil, |
efc7e75f | 5498 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5499 | Otherwise they are regarded as unibyte. This affects the display, |
5500 | file I/O and the behavior of various editing commands. | |
5501 | ||
5502 | This variable is buffer-local but you cannot set it directly; | |
5503 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5504 | Changing its default value with `setq-default' is supported. | |
5505 | See also variable `default-enable-multibyte-characters' and Info node | |
5506 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5507 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5508 | |
c71b5d9b | 5509 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5510 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5511 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5512 | This variable applies to saving the buffer, and also to `write-region' |
5513 | and other functions that use `write-region'. | |
5514 | It does not apply to sending output to subprocesses, however. | |
5515 | ||
5516 | If this is nil, the buffer is saved without any code conversion | |
5517 | unless some coding system is specified in `file-coding-system-alist' | |
5518 | for the buffer file. | |
5519 | ||
31a6cb06 EZ |
5520 | If the text to be saved cannot be encoded as specified by this variable, |
5521 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5522 | ||
018ba359 PJ |
5523 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5524 | ||
5525 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5526 | |
f44e260c | 5527 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5528 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5529 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5530 | |
6c0cf218 | 5531 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5532 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
b44d9321 | 5533 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5534 | |
b44d9321 EZ |
5535 | If this is nil (the default), the direction of each paragraph is |
5536 | determined by the first strong directional character of its text. | |
5537 | The values of `right-to-left' and `left-to-right' override that. | |
5538 | Any other value is treated as nil. | |
b4bf28b7 | 5539 | |
b44d9321 EZ |
5540 | This variable has no effect unless the buffer's value of |
5541 | \`bidi-display-reordering' is non-nil. */); | |
5542 | ||
4b4deea2 | 5543 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
7614d762 RS |
5544 | doc: /* *Non-nil means do not display continuation lines. |
5545 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5546 | |
5547 | Note that this is overridden by the variable | |
5548 | `truncate-partial-width-windows' if that variable is non-nil | |
5549 | and this buffer is not full-frame width. */); | |
1ab256cb | 5550 | |
4b4deea2 | 5551 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
0858cd02 CY |
5552 | doc: /* *Non-nil means to use word-wrapping for continuation lines. |
5553 | When word-wrapping is on, continuation lines are wrapped at the space | |
5554 | or tab character nearest to the right window edge. | |
5555 | If nil, continuation lines are wrapped at the right screen edge. | |
5556 | ||
5557 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5558 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5559 | word-wrapping, you might want to reduce the value of | |
5560 | `truncate-partial-width-windows', since wrapping can make text readable | |
5561 | in narrower windows. */); | |
0858cd02 | 5562 | |
4b4deea2 | 5563 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5564 | make_number (Lisp_String), |
efc7e75f | 5565 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5566 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5567 | |
4b4deea2 | 5568 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5569 | Qnil, |
efc7e75f | 5570 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5571 | It is called after self-inserting any character specified in |
5572 | the `auto-fill-chars' table. | |
5573 | NOTE: This variable is not a hook; | |
5574 | its value may not be a list of functions. */); | |
1ab256cb | 5575 | |
4b4deea2 | 5576 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5577 | make_number (Lisp_String), |
efc7e75f | 5578 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5579 | |
4b4deea2 | 5580 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5581 | make_number (Lisp_String), |
efc7e75f | 5582 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5583 | The truename of a file is calculated by `file-truename' |
5584 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5585 | |
1ab256cb | 5586 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5587 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5588 | make_number (Lisp_String), |
7614d762 RS |
5589 | doc: /* Name of file for auto-saving current buffer. |
5590 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5591 | |
4b4deea2 | 5592 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5593 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5594 | |
4b4deea2 | 5595 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5596 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5597 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5598 | |
4b4deea2 | 5599 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5600 | make_number (LISP_INT_TAG), |
efc7e75f | 5601 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5602 | 0 initially. |
5603 | -1 means auto-saving turned off until next real save. | |
5604 | ||
5605 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5606 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5607 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5608 | |
4b4deea2 | 5609 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5610 | Qnil, |
7614d762 | 5611 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5612 | An integer N as value means display only lines |
5613 | that start with less than N columns of space. | |
7614d762 RS |
5614 | A value of t means that the character ^M makes itself and |
5615 | all the rest of the line invisible; also, when saving the buffer | |
5616 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5617 | |
5618 | #ifndef old | |
5619 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5620 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5621 | Qnil, |
3f676284 | 5622 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5623 | #endif |
5624 | ||
4b4deea2 | 5625 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5626 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5627 | The value should be one of `overwrite-mode-textual', |
5628 | `overwrite-mode-binary', or nil. | |
5629 | If it is `overwrite-mode-textual', self-insertion still | |
5630 | inserts at the end of a line, and inserts when point is before a tab, | |
5631 | until the tab is filled in. | |
5632 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5633 | ||
4b4deea2 | 5634 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5635 | Qnil, |
efc7e75f | 5636 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5637 | |
5638 | If this variable is nil, the value of `standard-display-table' is used. | |
5639 | Each window can have its own, overriding display table, see | |
5640 | `set-window-display-table' and `window-display-table'. | |
5641 | ||
5642 | The display table is a char-table created with `make-display-table'. | |
5643 | A char-table is an array indexed by character codes. Normal array | |
5644 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5645 | ||
5646 | Each of the char-table elements control how to display the corresponding | |
5647 | text character: the element at index C in the table says how to display | |
5648 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5649 | characters or nil. The value nil means display the character in the |
5650 | default fashion; otherwise, the characters from the vector are delivered | |
5651 | to the screen instead of the original character. | |
018ba359 | 5652 | |
5fd11dc8 | 5653 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5654 | to display a capital Y instead of each X character. |
018ba359 PJ |
5655 | |
5656 | In addition, a char-table has six extra slots to control the display of: | |
5657 | ||
5658 | the end of a truncated screen line (extra-slot 0, a single character); | |
5659 | the end of a continued line (extra-slot 1, a single character); | |
5660 | the escape character used to display character codes in octal | |
5661 | (extra-slot 2, a single character); | |
5662 | the character used as an arrow for control characters (extra-slot 3, | |
5663 | a single character); | |
5664 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5665 | a vector of characters); | |
5666 | the character used to draw the border between side-by-side windows | |
5667 | (extra-slot 5, a single character). | |
5668 | ||
5669 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5670 | |
4b4deea2 | 5671 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5672 | Qnil, |
efc7e75f | 5673 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5674 | A value of nil means no marginal area. */); |
177c0ea7 | 5675 | |
4b4deea2 | 5676 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5677 | Qnil, |
efc7e75f | 5678 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5679 | A value of nil means no marginal area. */); |
177c0ea7 | 5680 | |
4b4deea2 | 5681 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a KS |
5682 | Qnil, |
5683 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5684 | A value of 0 means no left fringe is shown in this buffer's window. | |
5685 | A value of nil means to use the left fringe width from the window's frame. */); | |
5686 | ||
4b4deea2 | 5687 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a KS |
5688 | Qnil, |
5689 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5690 | A value of 0 means no right fringe is shown in this buffer's window. | |
5691 | A value of nil means to use the right fringe width from the window's frame. */); | |
5692 | ||
4b4deea2 | 5693 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a KS |
5694 | Qnil, |
5695 | doc: /* *Non-nil means to display fringes outside display margins. | |
5696 | A value of nil means to display fringes between margins and buffer text. */); | |
5697 | ||
4b4deea2 | 5698 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a KS |
5699 | Qnil, |
5700 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5701 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5702 | ||
4b4deea2 | 5703 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a KS |
5704 | Qnil, |
5705 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5706 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5707 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5708 | |
fc2c8887 RS |
5709 | A value of `left' or `right' means put the vertical scroll bar at that side |
5710 | of the window; a value of nil means don't show any vertical scroll bars. | |
5711 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5712 | |
0552666b | 5713 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5714 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
efc7e75f | 5715 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5716 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5717 | window-systems. */); | |
177c0ea7 | 5718 | |
6b61353c | 5719 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5720 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
6b61353c KH |
5721 | doc: /* *Visually indicate buffer boundaries and scrolling. |
5722 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5723 | of a window on window-systems with angle bitmaps, or if the window can be | |
5724 | scrolled, the top and bottom line of the window are marked with up and down | |
5725 | arrow bitmaps. | |
b2229037 KS |
5726 | |
5727 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5728 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5729 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5730 | the left fringe but no arrows. |
b2229037 | 5731 | |
79e3497d RS |
5732 | You can exercise more precise control by using an alist as the |
5733 | value. Each alist element (INDICATOR . POSITION) specifies | |
5734 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5735 | `bottom', `up', `down', or t, which specifies the default position, |
5736 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5737 | this indicator. | |
5738 | ||
5739 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5740 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5741 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5742 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5743 | |
c6a46372 | 5744 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5745 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
c6a46372 KS |
5746 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. |
5747 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5748 | specifies the fringe bitmaps used to display a specific logical | |
5749 | fringe indicator. | |
5750 | ||
5751 | INDICATOR specifies the logical indicator type which is one of the | |
5752 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5753 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5754 | |
14fb5704 | 5755 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5756 | the actual bitmap shown in the left or right fringe for the logical |
5757 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5758 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5759 | are used only for the `bottom' and `top-bottom' indicators when the |
5760 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5761 | symbol which is used in both left and right fringes. */); |
5762 | ||
5763 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5764 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
c6a46372 KS |
5765 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. |
5766 | The value is an alist where each element (CURSOR . BITMAP) | |
5767 | specifies the fringe bitmaps used to display a specific logical | |
5768 | cursor type in the fringe. | |
5769 | ||
5770 | CURSOR specifies the logical cursor type which is one of the following | |
5771 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5772 | one is used to show a hollow cursor on narrow lines display lines | |
5773 | where the normal hollow cursor will not fit. | |
5774 | ||
5775 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5776 | cursor type. */); | |
5777 | ||
0552666b | 5778 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5779 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5780 | doc: /* How far to scroll windows upward. |
5781 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5782 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5783 | means scroll to center point. A fraction means scroll to put point |
5784 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5785 | When the value is 0.0, point goes at the bottom line, which in the |
5786 | simple case that you moved off with C-f means scrolling just one line. | |
5787 | 1.0 means point goes at the top, so that in that simple case, the | |
5788 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5789 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5790 | |
0552666b | 5791 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5792 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5793 | doc: /* How far to scroll windows downward. |
5794 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5795 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5796 | means scroll to center point. A fraction means scroll to put point |
5797 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5798 | When the value is 0.0, point goes at the top line, which in the |
5799 | simple case that you moved off with C-b means scrolling just one line. | |
5800 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5801 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5802 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5803 | |
1ab256cb RM |
5804 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5805 | "Don't ask."); | |
5806 | */ | |
1ab256cb | 5807 | |
29208e82 | 5808 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5809 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5810 | Two arguments are passed to each function: the positions of |
5811 | the beginning and end of the range of old text to be changed. | |
5812 | \(For an insertion, the beginning and end are at the same place.) | |
5813 | No information is given about the length of the text after the change. | |
5814 | ||
5815 | Buffer changes made while executing the `before-change-functions' | |
5816 | don't call any before-change or after-change functions. | |
7b2bf907 | 5817 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5818 | |
5819 | If an unhandled error happens in running these functions, | |
5820 | the variable's value remains nil. That prevents the error | |
5821 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5822 | Vbefore_change_functions = Qnil; |
5823 | ||
29208e82 | 5824 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5825 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5826 | Three arguments are passed to each function: the positions of |
5827 | the beginning and end of the range of changed text, | |
5828 | and the length in bytes of the pre-change text replaced by that range. | |
5829 | \(For an insertion, the pre-change length is zero; | |
5830 | for a deletion, that length is the number of bytes deleted, | |
5831 | and the post-change beginning and end are at the same place.) | |
5832 | ||
5833 | Buffer changes made while executing the `after-change-functions' | |
5834 | don't call any before-change or after-change functions. | |
7b2bf907 | 5835 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5836 | |
5837 | If an unhandled error happens in running these functions, | |
5838 | the variable's value remains nil. That prevents the error | |
5839 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5840 | Vafter_change_functions = Qnil; |
5841 | ||
29208e82 | 5842 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5843 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5844 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5845 | Vfirst_change_hook = Qnil; |
1ab256cb | 5846 | |
4b4deea2 | 5847 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5848 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5849 | Recent changes come first; older changes follow newer. |
5850 | ||
5851 | An entry (BEG . END) represents an insertion which begins at | |
5852 | position BEG and ends at position END. | |
5853 | ||
5854 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5855 | from (abs POSITION). If POSITION is positive, point was at the front | |
5856 | of the text being deleted; if negative, point was at the end. | |
5857 | ||
5858 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5859 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5860 | of the visited file's modification time, as of that time. If the | |
5861 | modification time of the most recent save is different, this entry is | |
5862 | obsolete. | |
5863 | ||
5864 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5865 | was modified between BEG and END. PROPERTY is the property name, | |
5866 | and VALUE is the old value. | |
5867 | ||
7405f386 KS |
5868 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5869 | \(apply FUN-NAME ARGS). | |
5870 | ||
5871 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5872 | in the active region. BEG and END is the range affected by this entry | |
5873 | and DELTA is the number of bytes added or deleted in that range by | |
5874 | this change. | |
c6c7dc03 | 5875 | |
018ba359 PJ |
5876 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5877 | was adjusted in position by the offset DISTANCE (an integer). | |
5878 | ||
5879 | An entry of the form POSITION indicates that point was at the buffer | |
5880 | location given by the integer. Undoing an entry of this form places | |
5881 | point at POSITION. | |
5882 | ||
b4c4f2f4 JB |
5883 | Entries with value `nil' mark undo boundaries. The undo command treats |
5884 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5885 | |
5886 | If the value of the variable is t, undo information is not recorded. */); | |
5887 | ||
4b4deea2 | 5888 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5889 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5890 | |
4b4deea2 | 5891 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5892 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5893 | |
5894 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5895 | newlines. Columnar operations (like `move-to-column' and |
5896 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5897 | widths as they go. This works well for ordinary text, but if the |
5898 | buffer's lines are very long (say, more than 500 characters), these | |
5899 | motion functions will take longer to execute. Emacs may also take | |
5900 | longer to update the display. | |
5901 | ||
5629f29b | 5902 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5903 | results of their scans, and consult the cache to avoid rescanning |
5904 | regions of the buffer until the text is modified. The caches are most | |
5905 | beneficial when they prevent the most searching---that is, when the | |
5906 | buffer contains long lines and large regions of characters with the | |
5907 | same, fixed screen width. | |
5908 | ||
5629f29b | 5909 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5910 | become slightly slower (because of the overhead of consulting the |
5911 | cache), and the caches will use memory roughly proportional to the | |
5912 | number of newlines and characters whose screen width varies. | |
5913 | ||
5914 | The caches require no explicit maintenance; their accuracy is | |
5915 | maintained internally by the Emacs primitives. Enabling or disabling | |
5916 | the cache should not affect the behavior of any of the motion | |
5917 | functions; it should only affect their performance. */); | |
5918 | ||
4b4deea2 | 5919 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5920 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5921 | |
4b4deea2 | 5922 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5923 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5924 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5925 | set when a file is visited. */); |
be9aafdd | 5926 | |
71ed49fa | 5927 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5928 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
71ed49fa LT |
5929 | doc: /* *Format in which to write auto-save files. |
5930 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5931 | If it is t, which is the default, auto-save files are written in the | |
5932 | same format as a regular save would use. */); | |
5933 | ||
3cb719bd | 5934 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5935 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5936 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5937 | The default is t, which means that text is invisible |
5938 | if it has a non-nil `invisible' property. | |
5939 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5940 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5941 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5942 | then characters with property value PROP are invisible, | |
5943 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5944 | |
7962a441 | 5945 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5946 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5947 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5948 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5949 | |
5950 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5951 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5952 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5953 | The function `set-window-buffer' updates this variable |
5954 | to the value obtained by calling `current-time'. | |
5955 | If the buffer has never been shown in a window, the value is nil. */); | |
5956 | ||
29208e82 | 5957 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5958 | doc: /* Non-nil if Transient Mark mode is enabled. |
5959 | See the command `transient-mark-mode' for a description of this minor mode. | |
5960 | ||
5961 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5962 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5963 | all windows or just the selected window. | |
5964 | ||
f49d1f52 | 5965 | Lisp programs may give this variable certain special values: |
9d794026 | 5966 | |
f49d1f52 SM |
5967 | - A value of `lambda' enables Transient Mark mode temporarily. |
5968 | It is disabled again after any subsequent action that would | |
5969 | normally deactivate the mark (e.g. buffer modification). | |
5970 | ||
5971 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5972 | temporarily. After any subsequent point motion command that is | |
5973 | not shift-translated, or any other action that would normally | |
5974 | deactivate the mark (e.g. buffer modification), the value of | |
5975 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5976 | Vtransient_mark_mode = Qnil; |
5977 | ||
29208e82 | 5978 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
7ee72033 | 5979 | doc: /* *Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5980 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5981 | text properties. If the value is a list, disregard `buffer-read-only' | |
5982 | and disregard a `read-only' text property if the property value | |
5983 | is a member of the list. */); | |
a96b68f1 RS |
5984 | Vinhibit_read_only = Qnil; |
5985 | ||
4b4deea2 | 5986 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5987 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5988 | Values are interpreted as follows: |
5989 | ||
b8dc613f JB |
5990 | t use the cursor specified for the frame |
5991 | nil don't display a cursor | |
5992 | box display a filled box cursor | |
5993 | hollow display a hollow box cursor | |
5994 | bar display a vertical bar cursor with default width | |
5995 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5996 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5997 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5998 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 5999 | |
e08b1705 MR |
6000 | When the buffer is displayed in a non-selected window, the |
6001 | cursor's appearance is instead controlled by the variable | |
6002 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6003 | |
a3bbced0 | 6004 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 6005 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 6006 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
6007 | The space is measured in pixels, and put below lines on graphic displays, |
6008 | see `display-graphic-p'. | |
60ebfdf3 | 6009 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6010 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6011 | |
0124c5bd | 6012 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 6013 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
66c6abf0 GM |
6014 | doc: /* *Non-nil means show a cursor in non-selected windows. |
6015 | If nil, only shows a cursor in the selected window. | |
6016 | If t, displays a cursor related to the usual cursor type | |
6017 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
6018 | You can also specify the cursor type as in the `cursor-type' variable. | |
6019 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 6020 | |
29208e82 | 6021 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
6022 | doc: /* List of functions called with no args to query before killing a buffer. |
6023 | The buffer being killed will be current while the functions are running. | |
6024 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6025 | Vkill_buffer_query_functions = Qnil; |
6026 | ||
29208e82 | 6027 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
6028 | doc: /* Normal hook run before changing the major mode of a buffer. |
6029 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6030 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6031 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6032 | staticpro (&Qchange_major_mode_hook); |
6033 | ||
9397e56f MR |
6034 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
6035 | doc: /* Hook run when the buffer list changes. | |
6036 | Functions running this hook are `get-buffer-create', | |
6037 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
6038 | `record-buffer' and `unrecord-buffer'. */); | |
6039 | Vbuffer_list_update_hook = Qnil; | |
6040 | Qbuffer_list_update_hook = intern_c_string ("buffer-list-update-hook"); | |
6041 | staticpro (&Qbuffer_list_update_hook); | |
6042 | ||
0dc88e60 | 6043 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6044 | defsubr (&Sbuffer_list); |
6045 | defsubr (&Sget_buffer); | |
6046 | defsubr (&Sget_file_buffer); | |
6047 | defsubr (&Sget_buffer_create); | |
336cd056 | 6048 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6049 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6050 | defsubr (&Sbuffer_name); |
6051 | /*defsubr (&Sbuffer_number);*/ | |
6052 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6053 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6054 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6055 | defsubr (&Sbuffer_local_variables); |
6056 | defsubr (&Sbuffer_modified_p); | |
6057 | defsubr (&Sset_buffer_modified_p); | |
6058 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6059 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6060 | defsubr (&Srename_buffer); |
6061 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6062 | defsubr (&Sbuffer_enable_undo); |
6063 | defsubr (&Skill_buffer); | |
9397e56f MR |
6064 | defsubr (&Srecord_buffer); |
6065 | defsubr (&Sunrecord_buffer); | |
a9ee7a59 | 6066 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6067 | defsubr (&Scurrent_buffer); |
6068 | defsubr (&Sset_buffer); | |
6069 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6070 | defsubr (&Serase_buffer); |
13cda5f9 | 6071 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6072 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6073 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6074 | |
52f8ec73 | 6075 | defsubr (&Soverlayp); |
2eec3b4e RS |
6076 | defsubr (&Smake_overlay); |
6077 | defsubr (&Sdelete_overlay); | |
6078 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6079 | defsubr (&Soverlay_start); |
6080 | defsubr (&Soverlay_end); | |
6081 | defsubr (&Soverlay_buffer); | |
6082 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6083 | defsubr (&Soverlays_at); |
74514898 | 6084 | defsubr (&Soverlays_in); |
2eec3b4e | 6085 | defsubr (&Snext_overlay_change); |
239c932b | 6086 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6087 | defsubr (&Soverlay_recenter); |
6088 | defsubr (&Soverlay_lists); | |
6089 | defsubr (&Soverlay_get); | |
6090 | defsubr (&Soverlay_put); | |
a8c21b48 | 6091 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6092 | } |
6093 | ||
dfcf069d | 6094 | void |
d3da34e0 | 6095 | keys_of_buffer (void) |
1ab256cb RM |
6096 | { |
6097 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6098 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6099 | |
6100 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6101 | initialized when that function gets called. */ | |
d67b4f80 | 6102 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6103 | } |