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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
66c6abf0 | 2 | |
acaf905b | 3 | Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc. |
1ab256cb RM |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
1ab256cb RM |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 19 | |
68c45bf0 | 20 | #include <config.h> |
1ab256cb | 21 | |
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 | |
d6202519 PE |
30 | #include <verify.h> |
31 | ||
1ab256cb | 32 | #include "lisp.h" |
21cf4cf8 | 33 | #include "intervals.h" |
1ab256cb RM |
34 | #include "window.h" |
35 | #include "commands.h" | |
36 | #include "buffer.h" | |
8f348ed5 | 37 | #include "character.h" |
28e969dd | 38 | #include "region-cache.h" |
1ab256cb | 39 | #include "indent.h" |
d014bf88 | 40 | #include "blockinput.h" |
2538fae4 | 41 | #include "keyboard.h" |
e35f6ff7 | 42 | #include "keymap.h" |
08460cd4 | 43 | #include "frame.h" |
1ab256cb RM |
44 | |
45 | struct buffer *current_buffer; /* the current buffer */ | |
46 | ||
47 | /* First buffer in chain of all buffers (in reverse order of creation). | |
179dade4 | 48 | Threaded through ->header.next.buffer. */ |
1ab256cb RM |
49 | |
50 | struct buffer *all_buffers; | |
51 | ||
52 | /* This structure holds the default values of the buffer-local variables | |
53 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
54 | The default value occupies the same slot in this structure | |
55 | as an individual buffer's value occupies in that buffer. | |
56 | Setting the default value also goes through the alist of buffers | |
57 | and stores into each buffer that does not say it has a local value. */ | |
58 | ||
6b61353c | 59 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
60 | |
61 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
62 | ||
63 | static Lisp_Object Vbuffer_defaults; | |
64 | ||
65 | /* This structure marks which slots in a buffer have corresponding | |
66 | default values in buffer_defaults. | |
67 | Each such slot has a nonzero value in this structure. | |
68 | The value has only one nonzero bit. | |
69 | ||
70 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
71 | the entry for that slot (found in the same slot in this structure) |
72 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
73 | |
74 | If a slot in this structure is -1, then even though there may | |
75 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
76 | and the corresponding slot in buffer_defaults is not used. | |
77 | ||
1ab256cb RM |
78 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
79 | zero, that is a bug */ | |
80 | ||
81 | struct buffer buffer_local_flags; | |
82 | ||
83 | /* This structure holds the names of symbols whose values may be | |
84 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
85 | ||
6b61353c KH |
86 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
87 | ||
1ab256cb RM |
88 | /* A Lisp_Object pointer to the above, used for staticpro */ |
89 | static Lisp_Object Vbuffer_local_symbols; | |
90 | ||
ce5b453a SM |
91 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
92 | the buffer structure. */ | |
93 | ||
94 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
95 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
96 | ||
21514da7 PE |
97 | /* Maximum length of an overlay vector. */ |
98 | #define OVERLAY_COUNT_MAX \ | |
99 | ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \ | |
100 | min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object))) | |
101 | ||
13de9290 RS |
102 | /* Flags indicating which built-in buffer-local variables |
103 | are permanent locals. */ | |
7313acd0 | 104 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
105 | |
106 | /* Number of per-buffer variables used. */ | |
107 | ||
7313acd0 | 108 | int last_per_buffer_idx; |
13de9290 | 109 | |
cd64ea1d PE |
110 | static Lisp_Object Fset_buffer_major_mode (Lisp_Object); |
111 | static Lisp_Object Fdelete_overlay (Lisp_Object); | |
f57e2426 J |
112 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, |
113 | int after, Lisp_Object arg1, | |
114 | Lisp_Object arg2, Lisp_Object arg3); | |
115 | static void swap_out_buffer_local_variables (struct buffer *b); | |
116 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
117 | |
118 | /* Alist of all buffer names vs the buffers. */ | |
119 | /* This used to be a variable, but is no longer, | |
120 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
121 | Lisp_Object Vbuffer_alist; | |
122 | ||
955cbe7b | 123 | static Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 124 | |
43ed3b8d | 125 | /* Hook run before changing a major mode. */ |
955cbe7b | 126 | static Lisp_Object Qchange_major_mode_hook; |
22378665 | 127 | |
dbc4e1c1 | 128 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
129 | Lisp_Object Qbefore_change_functions; |
130 | Lisp_Object Qafter_change_functions; | |
955cbe7b | 131 | static Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 132 | |
955cbe7b PE |
133 | static Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
134 | static Lisp_Object Qpermanent_local_hook; | |
1ab256cb | 135 | |
955cbe7b | 136 | static Lisp_Object Qprotected_field; |
1ab256cb | 137 | |
955cbe7b | 138 | static Lisp_Object QSFundamental; /* A string "Fundamental" */ |
1ab256cb | 139 | |
955cbe7b | 140 | static Lisp_Object Qkill_buffer_hook; |
9397e56f | 141 | static Lisp_Object Qbuffer_list_update_hook; |
1ab256cb | 142 | |
955cbe7b | 143 | static Lisp_Object Qget_file_buffer; |
5fe0b67e | 144 | |
955cbe7b | 145 | static Lisp_Object Qoverlayp; |
52f8ec73 | 146 | |
955cbe7b | 147 | Lisp_Object Qpriority, Qbefore_string, Qafter_string; |
9397e56f | 148 | |
28545e04 | 149 | static Lisp_Object Qevaporate; |
5985d248 | 150 | |
294d215f RS |
151 | Lisp_Object Qmodification_hooks; |
152 | Lisp_Object Qinsert_in_front_hooks; | |
153 | Lisp_Object Qinsert_behind_hooks; | |
154 | ||
fd05c7e9 | 155 | static void alloc_buffer_text (struct buffer *, ptrdiff_t); |
f57e2426 J |
156 | static void free_buffer_text (struct buffer *b); |
157 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
158 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
159 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 160 | |
1ab256cb RM |
161 | /* For debugging; temporary. See set_buffer_internal. */ |
162 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
163 | ||
01136e9b | 164 | void |
d3da34e0 | 165 | nsberror (Lisp_Object spec) |
1ab256cb | 166 | { |
a7a60ce9 | 167 | if (STRINGP (spec)) |
d5db4077 | 168 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
169 | error ("Invalid buffer argument"); |
170 | } | |
171 | \f | |
a7ca3326 | 172 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
173 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
174 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 175 | (Lisp_Object object) |
0dc88e60 | 176 | { |
4b4deea2 | 177 | return ((BUFFERP (object) && ! NILP (BVAR (XBUFFER (object), name))) |
0dc88e60 RS |
178 | ? Qt : Qnil); |
179 | } | |
180 | ||
08460cd4 | 181 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 182 | doc: /* Return a list of all existing live buffers. |
9397e56f MR |
183 | If the optional arg FRAME is a frame, we return the buffer list in the |
184 | proper order for that frame: the buffers show in FRAME come first, | |
185 | followed by the rest of the buffers. */) | |
5842a27b | 186 | (Lisp_Object frame) |
1ab256cb | 187 | { |
a18b8cb5 | 188 | Lisp_Object general; |
08460cd4 RS |
189 | general = Fmapcar (Qcdr, Vbuffer_alist); |
190 | ||
191 | if (FRAMEP (frame)) | |
192 | { | |
a18b8cb5 KL |
193 | Lisp_Object framelist, prevlist, tail; |
194 | Lisp_Object args[3]; | |
08460cd4 | 195 | |
b7826503 | 196 | CHECK_FRAME (frame); |
08460cd4 | 197 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
9397e56f MR |
198 | prevlist = Fnreverse (Fcopy_sequence |
199 | (XFRAME (frame)->buried_buffer_list)); | |
08460cd4 | 200 | |
a18b8cb5 KL |
201 | /* Remove from GENERAL any buffer that duplicates one in |
202 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 203 | tail = framelist; |
a18b8cb5 | 204 | while (CONSP (tail)) |
08460cd4 | 205 | { |
7539e11f KR |
206 | general = Fdelq (XCAR (tail), general); |
207 | tail = XCDR (tail); | |
08460cd4 | 208 | } |
a18b8cb5 KL |
209 | tail = prevlist; |
210 | while (CONSP (tail)) | |
211 | { | |
212 | general = Fdelq (XCAR (tail), general); | |
213 | tail = XCDR (tail); | |
214 | } | |
215 | ||
216 | args[0] = framelist; | |
217 | args[1] = general; | |
218 | args[2] = prevlist; | |
219 | return Fnconc (3, args); | |
08460cd4 | 220 | } |
9397e56f MR |
221 | else |
222 | return general; | |
1ab256cb RM |
223 | } |
224 | ||
04ae1b48 RS |
225 | /* Like Fassoc, but use Fstring_equal to compare |
226 | (which ignores text properties), | |
227 | and don't ever QUIT. */ | |
228 | ||
229 | static Lisp_Object | |
d3da34e0 | 230 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
231 | { |
232 | register Lisp_Object tail; | |
6d70a280 | 233 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
234 | { |
235 | register Lisp_Object elt, tem; | |
6d70a280 | 236 | elt = XCAR (tail); |
04ae1b48 RS |
237 | tem = Fstring_equal (Fcar (elt), key); |
238 | if (!NILP (tem)) | |
239 | return elt; | |
240 | } | |
241 | return Qnil; | |
242 | } | |
243 | ||
a7ca3326 | 244 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
245 | doc: /* Return the buffer named BUFFER-OR-NAME. |
246 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
247 | is a string and there is no buffer with that name, return nil. If | |
248 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 249 | (register Lisp_Object buffer_or_name) |
1ab256cb | 250 | { |
c8804c4f MR |
251 | if (BUFFERP (buffer_or_name)) |
252 | return buffer_or_name; | |
253 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 254 | |
c8804c4f | 255 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
256 | } |
257 | ||
258 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 259 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
260 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
261 | If there is no such live buffer, return nil. | |
7ee72033 | 262 | See also `find-buffer-visiting'. */) |
5842a27b | 263 | (register Lisp_Object filename) |
1ab256cb RM |
264 | { |
265 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
266 | Lisp_Object handler; |
267 | ||
b7826503 | 268 | CHECK_STRING (filename); |
1ab256cb RM |
269 | filename = Fexpand_file_name (filename, Qnil); |
270 | ||
5fe0b67e RS |
271 | /* If the file name has special constructs in it, |
272 | call the corresponding file handler. */ | |
a617e913 | 273 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e | 274 | if (!NILP (handler)) |
a59225b1 CY |
275 | { |
276 | Lisp_Object handled_buf = call2 (handler, Qget_file_buffer, | |
277 | filename); | |
278 | return BUFFERP (handled_buf) ? handled_buf : Qnil; | |
279 | } | |
5fe0b67e | 280 | |
7539e11f | 281 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 282 | { |
7539e11f | 283 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 | 284 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
285 | if (!STRINGP (BVAR (XBUFFER (buf), filename))) continue; |
286 | tem = Fstring_equal (BVAR (XBUFFER (buf), filename), filename); | |
265a9e55 | 287 | if (!NILP (tem)) |
1ab256cb RM |
288 | return buf; |
289 | } | |
290 | return Qnil; | |
291 | } | |
292 | ||
52e01189 | 293 | Lisp_Object |
d3da34e0 | 294 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
295 | { |
296 | register Lisp_Object tail, buf, tem; | |
297 | ||
7539e11f | 298 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 299 | { |
7539e11f | 300 | buf = Fcdr (XCAR (tail)); |
52e01189 | 301 | if (!BUFFERP (buf)) continue; |
4b4deea2 TT |
302 | if (!STRINGP (BVAR (XBUFFER (buf), file_truename))) continue; |
303 | tem = Fstring_equal (BVAR (XBUFFER (buf), file_truename), filename); | |
52e01189 RS |
304 | if (!NILP (tem)) |
305 | return buf; | |
306 | } | |
307 | return Qnil; | |
308 | } | |
309 | ||
a7ca3326 | 310 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
cd265ca6 MR |
311 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
312 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
313 | return that buffer. If no such buffer exists, create a new buffer with | |
314 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
315 | buffer does not keep undo information. | |
316 | ||
317 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
318 | even if it is dead. The return value is never nil. */) | |
5842a27b | 319 | (register Lisp_Object buffer_or_name) |
1ab256cb | 320 | { |
cd265ca6 | 321 | register Lisp_Object buffer, name; |
1ab256cb RM |
322 | register struct buffer *b; |
323 | ||
cd265ca6 MR |
324 | buffer = Fget_buffer (buffer_or_name); |
325 | if (!NILP (buffer)) | |
326 | return buffer; | |
1ab256cb | 327 | |
cd265ca6 | 328 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
329 | error ("Empty string for buffer name is not allowed"); |
330 | ||
cc648cef | 331 | b = allocate_buffer (); |
1ab256cb | 332 | |
336cd056 RS |
333 | /* An ordinary buffer uses its own struct buffer_text. */ |
334 | b->text = &b->own_text; | |
335 | b->base_buffer = 0; | |
336 | ||
1ab256cb | 337 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 338 | BLOCK_INPUT; |
3b06f880 KH |
339 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
340 | anchoring a search. */ | |
b86af064 | 341 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 342 | UNBLOCK_INPUT; |
1ab256cb | 343 | if (! BUF_BEG_ADDR (b)) |
531b0165 | 344 | buffer_memory_full (BUF_GAP_SIZE (b) + 1); |
1ab256cb | 345 | |
cffc6f3b CY |
346 | b->pt = BEG; |
347 | b->begv = BEG; | |
348 | b->zv = BEG; | |
349 | b->pt_byte = BEG_BYTE; | |
350 | b->begv_byte = BEG_BYTE; | |
351 | b->zv_byte = BEG_BYTE; | |
352 | ||
6d70a280 | 353 | BUF_GPT (b) = BEG; |
6d70a280 | 354 | BUF_GPT_BYTE (b) = BEG_BYTE; |
cffc6f3b CY |
355 | |
356 | BUF_Z (b) = BEG; | |
6d70a280 | 357 | BUF_Z_BYTE (b) = BEG_BYTE; |
1ab256cb | 358 | BUF_MODIFF (b) = 1; |
3e145152 | 359 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 360 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
361 | BUF_SAVE_MODIFF (b) = 1; |
362 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
363 | BUF_UNCHANGED_MODIFIED (b) = 1; |
364 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
365 | BUF_END_UNCHANGED (b) = 0; | |
366 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 367 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
2941c447 | 368 | b->text->inhibit_shrinking = 0; |
1ab256cb | 369 | |
28e969dd JB |
370 | b->newline_cache = 0; |
371 | b->width_run_cache = 0; | |
4b4deea2 | 372 | BVAR (b, width_table) = Qnil; |
b5a225b4 | 373 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 374 | |
1ab256cb | 375 | /* Put this on the chain of all buffers including killed ones. */ |
eab3844f | 376 | b->header.next.buffer = all_buffers; |
1ab256cb RM |
377 | all_buffers = b; |
378 | ||
336cd056 RS |
379 | /* An ordinary buffer normally doesn't need markers |
380 | to handle BEGV and ZV. */ | |
4b4deea2 TT |
381 | BVAR (b, pt_marker) = Qnil; |
382 | BVAR (b, begv_marker) = Qnil; | |
383 | BVAR (b, zv_marker) = Qnil; | |
04ae1b48 | 384 | |
cd265ca6 | 385 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 386 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 387 | BVAR (b, name) = name; |
04ae1b48 | 388 | |
4b4deea2 | 389 | BVAR (b, undo_list) = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
390 | |
391 | reset_buffer (b); | |
13de9290 | 392 | reset_buffer_local_variables (b, 1); |
1ab256cb | 393 | |
4b4deea2 | 394 | BVAR (b, mark) = Fmake_marker (); |
65745fad | 395 | BUF_MARKERS (b) = NULL; |
4b4deea2 | 396 | BVAR (b, name) = name; |
1f57cb74 | 397 | |
1ab256cb | 398 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
399 | XSETBUFFER (buffer, b); |
400 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
9397e56f MR |
401 | /* And run buffer-list-update-hook. */ |
402 | if (!NILP (Vrun_hooks)) | |
403 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1ab256cb | 404 | |
2f064abf | 405 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
406 | can lead to infinite regress until you run out of stack. rms |
407 | says that's not worth protecting against. */ | |
48265e61 | 408 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
409 | /* buffer is on buffer-alist, so no gcpro. */ |
410 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 411 | |
cd265ca6 | 412 | return buffer; |
336cd056 RS |
413 | } |
414 | ||
7e9d5818 | 415 | |
04e4cb3a GM |
416 | /* Return a list of overlays which is a copy of the overlay list |
417 | LIST, but for buffer B. */ | |
418 | ||
2410d73a | 419 | static struct Lisp_Overlay * |
d3da34e0 | 420 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 421 | { |
2410d73a SM |
422 | Lisp_Object buffer; |
423 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
424 | |
425 | XSETBUFFER (buffer, b); | |
426 | ||
2410d73a | 427 | for (; list; list = list->next) |
04e4cb3a GM |
428 | { |
429 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 430 | EMACS_INT charpos; |
04e4cb3a | 431 | |
2410d73a | 432 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
433 | charpos = marker_position (OVERLAY_START (old_overlay)); |
434 | start = Fmake_marker (); | |
db3a49a6 | 435 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
436 | XMARKER (start)->insertion_type |
437 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
438 | ||
439 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
440 | end = Fmake_marker (); | |
db3a49a6 | 441 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
442 | XMARKER (end)->insertion_type |
443 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
444 | ||
445 | overlay = allocate_misc (); | |
446 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
447 | OVERLAY_START (overlay) = start; | |
448 | OVERLAY_END (overlay) = end; | |
449 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 450 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 451 | |
2410d73a SM |
452 | if (tail) |
453 | tail = tail->next = XOVERLAY (overlay); | |
454 | else | |
455 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
456 | } |
457 | ||
2410d73a | 458 | return result; |
04e4cb3a | 459 | } |
177c0ea7 | 460 | |
04e4cb3a | 461 | |
7e9d5818 GM |
462 | /* Clone per-buffer values of buffer FROM. |
463 | ||
464 | Buffer TO gets the same per-buffer values as FROM, with the | |
465 | following exceptions: (1) TO's name is left untouched, (2) markers | |
466 | are copied and made to refer to TO, and (3) overlay lists are | |
467 | copied. */ | |
468 | ||
469 | static void | |
d3da34e0 | 470 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 471 | { |
54622f33 | 472 | Lisp_Object to_buffer; |
7e9d5818 GM |
473 | int offset; |
474 | ||
475 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 476 | |
3ee24aec SM |
477 | /* buffer-local Lisp variables start at `undo_list', |
478 | tho only the ones from `name' on are GC'd normally. */ | |
22b4128e PE |
479 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
480 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7e9d5818 GM |
481 | offset += sizeof (Lisp_Object)) |
482 | { | |
483 | Lisp_Object obj; | |
484 | ||
4b7cdc0e SM |
485 | /* Don't touch the `name' which should be unique for every buffer. */ |
486 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
487 | continue; | |
488 | ||
7e9d5818 | 489 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 490 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
491 | { |
492 | struct Lisp_Marker *m = XMARKER (obj); | |
493 | obj = Fmake_marker (); | |
494 | XMARKER (obj)->insertion_type = m->insertion_type; | |
495 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
496 | } | |
497 | ||
498 | PER_BUFFER_VALUE (to, offset) = obj; | |
499 | } | |
500 | ||
72af86bd | 501 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 502 | |
04e4cb3a GM |
503 | to->overlays_before = copy_overlays (to, from->overlays_before); |
504 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 505 | |
e1688f54 RS |
506 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
507 | and install that in TO. */ | |
4b4deea2 | 508 | BVAR (to, local_var_alist) = buffer_lisp_local_variables (from); |
7e9d5818 GM |
509 | } |
510 | ||
cffc6f3b CY |
511 | |
512 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
513 | current, update these markers. */ | |
514 | ||
515 | static void | |
516 | record_buffer_markers (struct buffer *b) | |
517 | { | |
518 | if (! NILP (BVAR (b, pt_marker))) | |
519 | { | |
520 | Lisp_Object buffer; | |
521 | ||
522 | eassert (!NILP (BVAR (b, begv_marker))); | |
523 | eassert (!NILP (BVAR (b, zv_marker))); | |
524 | ||
525 | XSETBUFFER (buffer, b); | |
526 | set_marker_both (BVAR (b, pt_marker), buffer, b->pt, b->pt_byte); | |
527 | set_marker_both (BVAR (b, begv_marker), buffer, b->begv, b->begv_byte); | |
528 | set_marker_both (BVAR (b, zv_marker), buffer, b->zv, b->zv_byte); | |
529 | } | |
530 | } | |
531 | ||
532 | ||
533 | /* If buffer B has markers to record PT, BEGV and ZV when it is not | |
534 | current, fetch these values into B->begv etc. */ | |
535 | ||
536 | static void | |
537 | fetch_buffer_markers (struct buffer *b) | |
538 | { | |
539 | if (! NILP (BVAR (b, pt_marker))) | |
540 | { | |
541 | Lisp_Object m; | |
542 | ||
543 | eassert (!NILP (BVAR (b, begv_marker))); | |
544 | eassert (!NILP (BVAR (b, zv_marker))); | |
545 | ||
546 | m = BVAR (b, pt_marker); | |
547 | SET_BUF_PT_BOTH (b, marker_position (m), marker_byte_position (m)); | |
548 | ||
549 | m = BVAR (b, begv_marker); | |
550 | SET_BUF_BEGV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
551 | ||
552 | m = BVAR (b, zv_marker); | |
553 | SET_BUF_ZV_BOTH (b, marker_position (m), marker_byte_position (m)); | |
554 | } | |
555 | } | |
556 | ||
557 | ||
7e9d5818 GM |
558 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
559 | 2, 3, | |
193c3837 | 560 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 561 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 562 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
563 | NAME should be a string which is not the name of an existing buffer. |
564 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
565 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 566 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 567 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 568 | { |
6b61353c | 569 | Lisp_Object buf, tem; |
7e9d5818 | 570 | struct buffer *b; |
336cd056 | 571 | |
6b61353c | 572 | CHECK_STRING (name); |
336cd056 RS |
573 | buf = Fget_buffer (name); |
574 | if (!NILP (buf)) | |
d5db4077 | 575 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 576 | |
6b61353c | 577 | tem = base_buffer; |
336cd056 RS |
578 | base_buffer = Fget_buffer (base_buffer); |
579 | if (NILP (base_buffer)) | |
6b61353c | 580 | error ("No such buffer: `%s'", SDATA (tem)); |
4b4deea2 | 581 | if (NILP (BVAR (XBUFFER (base_buffer), name))) |
6b61353c | 582 | error ("Base buffer has been killed"); |
336cd056 | 583 | |
d5db4077 | 584 | if (SCHARS (name) == 0) |
336cd056 RS |
585 | error ("Empty string for buffer name is not allowed"); |
586 | ||
cc648cef | 587 | b = allocate_buffer (); |
336cd056 | 588 | |
67ee9f6e SM |
589 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
590 | ? XBUFFER (base_buffer)->base_buffer | |
591 | : XBUFFER (base_buffer)); | |
336cd056 RS |
592 | |
593 | /* Use the base buffer's text object. */ | |
594 | b->text = b->base_buffer->text; | |
595 | ||
cffc6f3b CY |
596 | b->pt = b->base_buffer->pt; |
597 | b->begv = b->base_buffer->begv; | |
598 | b->zv = b->base_buffer->zv; | |
599 | b->pt_byte = b->base_buffer->pt_byte; | |
600 | b->begv_byte = b->base_buffer->begv_byte; | |
601 | b->zv_byte = b->base_buffer->zv_byte; | |
336cd056 RS |
602 | |
603 | b->newline_cache = 0; | |
604 | b->width_run_cache = 0; | |
4b4deea2 | 605 | BVAR (b, width_table) = Qnil; |
336cd056 RS |
606 | |
607 | /* Put this on the chain of all buffers including killed ones. */ | |
eab3844f | 608 | b->header.next.buffer = all_buffers; |
336cd056 RS |
609 | all_buffers = b; |
610 | ||
611 | name = Fcopy_sequence (name); | |
ab77f05c | 612 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
4b4deea2 | 613 | BVAR (b, name) = name; |
336cd056 RS |
614 | |
615 | reset_buffer (b); | |
13de9290 | 616 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
617 | |
618 | /* Put this in the alist of all live buffers. */ | |
619 | XSETBUFFER (buf, b); | |
620 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
621 | ||
4b4deea2 TT |
622 | BVAR (b, mark) = Fmake_marker (); |
623 | BVAR (b, name) = name; | |
336cd056 | 624 | |
abc9d959 | 625 | /* The multibyte status belongs to the base buffer. */ |
4b4deea2 | 626 | BVAR (b, enable_multibyte_characters) = BVAR (b->base_buffer, enable_multibyte_characters); |
abc9d959 | 627 | |
336cd056 | 628 | /* Make sure the base buffer has markers for its narrowing. */ |
4b4deea2 | 629 | if (NILP (BVAR (b->base_buffer, pt_marker))) |
336cd056 | 630 | { |
2aa46d6c CY |
631 | eassert (NILP (BVAR (b->base_buffer, begv_marker))); |
632 | eassert (NILP (BVAR (b->base_buffer, zv_marker))); | |
cffc6f3b | 633 | |
4b4deea2 TT |
634 | BVAR (b->base_buffer, pt_marker) = Fmake_marker (); |
635 | set_marker_both (BVAR (b->base_buffer, pt_marker), base_buffer, | |
cffc6f3b CY |
636 | b->base_buffer->pt, |
637 | b->base_buffer->pt_byte); | |
638 | ||
4b4deea2 TT |
639 | BVAR (b->base_buffer, begv_marker) = Fmake_marker (); |
640 | set_marker_both (BVAR (b->base_buffer, begv_marker), base_buffer, | |
cffc6f3b CY |
641 | b->base_buffer->begv, |
642 | b->base_buffer->begv_byte); | |
643 | ||
4b4deea2 TT |
644 | BVAR (b->base_buffer, zv_marker) = Fmake_marker (); |
645 | set_marker_both (BVAR (b->base_buffer, zv_marker), base_buffer, | |
cffc6f3b CY |
646 | b->base_buffer->zv, |
647 | b->base_buffer->zv_byte); | |
4b4deea2 | 648 | XMARKER (BVAR (b->base_buffer, zv_marker))->insertion_type = 1; |
336cd056 RS |
649 | } |
650 | ||
7e9d5818 GM |
651 | if (NILP (clone)) |
652 | { | |
653 | /* Give the indirect buffer markers for its narrowing. */ | |
4b4deea2 | 654 | BVAR (b, pt_marker) = Fmake_marker (); |
cffc6f3b | 655 | set_marker_both (BVAR (b, pt_marker), buf, b->pt, b->pt_byte); |
4b4deea2 | 656 | BVAR (b, begv_marker) = Fmake_marker (); |
cffc6f3b | 657 | set_marker_both (BVAR (b, begv_marker), buf, b->begv, b->begv_byte); |
4b4deea2 | 658 | BVAR (b, zv_marker) = Fmake_marker (); |
cffc6f3b | 659 | set_marker_both (BVAR (b, zv_marker), buf, b->zv, b->zv_byte); |
4b4deea2 | 660 | XMARKER (BVAR (b, zv_marker))->insertion_type = 1; |
7e9d5818 GM |
661 | } |
662 | else | |
7fa57e45 RS |
663 | { |
664 | struct buffer *old_b = current_buffer; | |
665 | ||
666 | clone_per_buffer_values (b->base_buffer, b); | |
4b4deea2 TT |
667 | BVAR (b, filename) = Qnil; |
668 | BVAR (b, file_truename) = Qnil; | |
669 | BVAR (b, display_count) = make_number (0); | |
670 | BVAR (b, backed_up) = Qnil; | |
671 | BVAR (b, auto_save_file_name) = Qnil; | |
7fa57e45 RS |
672 | set_buffer_internal_1 (b); |
673 | Fset (intern ("buffer-save-without-query"), Qnil); | |
674 | Fset (intern ("buffer-file-number"), Qnil); | |
675 | Fset (intern ("buffer-stale-function"), Qnil); | |
676 | set_buffer_internal_1 (old_b); | |
677 | } | |
336cd056 | 678 | |
9397e56f MR |
679 | /* Run buffer-list-update-hook. */ |
680 | if (!NILP (Vrun_hooks)) | |
681 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
682 | ||
a9ee7a59 | 683 | return buf; |
1ab256cb RM |
684 | } |
685 | ||
d4f5719a | 686 | void |
d3da34e0 | 687 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
688 | { |
689 | Lisp_Object overlay; | |
690 | ||
691 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
692 | have to empty the list, otherwise we end up with overlays that | |
693 | think they belong to this buffer while the buffer doesn't know about | |
694 | them any more. */ | |
695 | while (b->overlays_before) | |
696 | { | |
697 | XSETMISC (overlay, b->overlays_before); | |
698 | Fdelete_overlay (overlay); | |
699 | } | |
700 | while (b->overlays_after) | |
701 | { | |
702 | XSETMISC (overlay, b->overlays_after); | |
703 | Fdelete_overlay (overlay); | |
704 | } | |
705 | eassert (b->overlays_before == NULL); | |
706 | eassert (b->overlays_after == NULL); | |
707 | } | |
708 | ||
bcd40520 | 709 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 710 | and local variables. |
d4f5719a SM |
711 | If called on an already-initialized buffer, the list of overlays |
712 | should be deleted before calling this function, otherwise we end up | |
713 | with overlays that claim to belong to the buffer but the buffer | |
714 | claims it doesn't belong to it. */ | |
1ab256cb RM |
715 | |
716 | void | |
d3da34e0 | 717 | reset_buffer (register struct buffer *b) |
1ab256cb | 718 | { |
4b4deea2 TT |
719 | BVAR (b, filename) = Qnil; |
720 | BVAR (b, file_truename) = Qnil; | |
721 | BVAR (b, directory) = (current_buffer) ? BVAR (current_buffer, directory) : Qnil; | |
1ab256cb | 722 | b->modtime = 0; |
58b963f7 | 723 | b->modtime_size = -1; |
4b4deea2 | 724 | XSETFASTINT (BVAR (b, save_length), 0); |
1ab256cb | 725 | b->last_window_start = 1; |
8b264726 | 726 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
727 | b->clip_changed = 0; |
728 | b->prevent_redisplay_optimizations_p = 1; | |
4b4deea2 | 729 | BVAR (b, backed_up) = Qnil; |
0b5397c2 | 730 | BUF_AUTOSAVE_MODIFF (b) = 0; |
4222c55d | 731 | b->auto_save_failure_time = 0; |
4b4deea2 TT |
732 | BVAR (b, auto_save_file_name) = Qnil; |
733 | BVAR (b, read_only) = Qnil; | |
2410d73a SM |
734 | b->overlays_before = NULL; |
735 | b->overlays_after = NULL; | |
c2d5b10f | 736 | b->overlay_center = BEG; |
4b4deea2 TT |
737 | BVAR (b, mark_active) = Qnil; |
738 | BVAR (b, point_before_scroll) = Qnil; | |
739 | BVAR (b, file_format) = Qnil; | |
740 | BVAR (b, auto_save_file_format) = Qt; | |
741 | BVAR (b, last_selected_window) = Qnil; | |
742 | XSETINT (BVAR (b, display_count), 0); | |
743 | BVAR (b, display_time) = Qnil; | |
744 | BVAR (b, enable_multibyte_characters) = BVAR (&buffer_defaults, enable_multibyte_characters); | |
745 | BVAR (b, cursor_type) = BVAR (&buffer_defaults, cursor_type); | |
746 | BVAR (b, extra_line_spacing) = BVAR (&buffer_defaults, extra_line_spacing); | |
0522997d RS |
747 | |
748 | b->display_error_modiff = 0; | |
1ab256cb RM |
749 | } |
750 | ||
bcd40520 RS |
751 | /* Reset buffer B's local variables info. |
752 | Don't use this on a buffer that has already been in use; | |
753 | it does not treat permanent locals consistently. | |
13de9290 RS |
754 | Instead, use Fkill_all_local_variables. |
755 | ||
3709505e | 756 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
757 | buffer-local variables. If PERMANENT_TOO is 0, |
758 | we preserve those. */ | |
bcd40520 | 759 | |
13de9290 | 760 | static void |
d3da34e0 | 761 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
762 | { |
763 | register int offset; | |
7c02e886 | 764 | int i; |
1ab256cb RM |
765 | |
766 | /* Reset the major mode to Fundamental, together with all the | |
767 | things that depend on the major mode. | |
768 | default-major-mode is handled at a higher level. | |
769 | We ignore it here. */ | |
4b4deea2 TT |
770 | BVAR (b, major_mode) = Qfundamental_mode; |
771 | BVAR (b, keymap) = Qnil; | |
772 | BVAR (b, mode_name) = QSFundamental; | |
773 | BVAR (b, minor_modes) = Qnil; | |
3446af9c RS |
774 | |
775 | /* If the standard case table has been altered and invalidated, | |
776 | fix up its insides first. */ | |
777 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
778 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
779 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
780 | Fset_standard_case_table (Vascii_downcase_table); | |
781 | ||
4b4deea2 TT |
782 | BVAR (b, downcase_table) = Vascii_downcase_table; |
783 | BVAR (b, upcase_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; | |
784 | BVAR (b, case_canon_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
785 | BVAR (b, case_eqv_table) = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
786 | BVAR (b, invisibility_spec) = Qt; | |
3cb719bd | 787 | |
13de9290 | 788 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e | 789 | if (permanent_too) |
4b4deea2 | 790 | BVAR (b, local_var_alist) = Qnil; |
3709505e SM |
791 | else |
792 | { | |
2f7a359d | 793 | Lisp_Object tmp, prop, last = Qnil; |
4b4deea2 | 794 | for (tmp = BVAR (b, local_var_alist); CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 795 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
796 | { |
797 | /* If permanent-local, keep it. */ | |
798 | last = tmp; | |
799 | if (EQ (prop, Qpermanent_local_hook)) | |
800 | { | |
801 | /* This is a partially permanent hook variable. | |
802 | Preserve only the elements that want to be preserved. */ | |
803 | Lisp_Object list, newlist; | |
804 | list = XCDR (XCAR (tmp)); | |
805 | if (!CONSP (list)) | |
806 | newlist = list; | |
807 | else | |
808 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
809 | { | |
810 | Lisp_Object elt = XCAR (list); | |
811 | /* Preserve element ELT if it's t, | |
812 | if it is a function with a `permanent-local-hook' property, | |
813 | or if it's not a symbol. */ | |
814 | if (! SYMBOLP (elt) | |
815 | || EQ (elt, Qt) | |
816 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
817 | newlist = Fcons (elt, newlist); | |
818 | } | |
819 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
820 | } | |
821 | } | |
822 | /* Delete this local variable. */ | |
3709505e | 823 | else if (NILP (last)) |
4b4deea2 | 824 | BVAR (b, local_var_alist) = XCDR (tmp); |
3709505e SM |
825 | else |
826 | XSETCDR (last, XCDR (tmp)); | |
827 | } | |
828 | ||
7313acd0 | 829 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 830 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 831 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
832 | |
833 | /* For each slot that has a default value, | |
834 | copy that into the slot. */ | |
835 | ||
3ee24aec SM |
836 | /* buffer-local Lisp variables start at `undo_list', |
837 | tho only the ones from `name' on are GC'd normally. */ | |
8a5c77bb PE |
838 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
839 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7c02e886 | 840 | offset += sizeof (Lisp_Object)) |
aab80822 | 841 | { |
7313acd0 | 842 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
843 | if ((idx > 0 |
844 | && (permanent_too | |
ce5b453a | 845 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 846 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 847 | } |
1ab256cb RM |
848 | } |
849 | ||
01050cb5 RM |
850 | /* We split this away from generate-new-buffer, because rename-buffer |
851 | and set-visited-file-name ought to be able to use this to really | |
852 | rename the buffer properly. */ | |
853 | ||
a7ca3326 | 854 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, |
16a97296 | 855 | Sgenerate_new_buffer_name, 1, 2, 0, |
7ee72033 | 856 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
857 | If there is no live buffer named NAME, then return NAME. |
858 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 859 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
860 | Optional second argument IGNORE specifies a name that is okay to use (if |
861 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 862 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
863 | { |
864 | register Lisp_Object gentemp, tem; | |
666398f3 PE |
865 | EMACS_INT count; |
866 | char number[INT_BUFSIZE_BOUND (EMACS_INT) + sizeof "<>"]; | |
1ab256cb | 867 | |
b7826503 | 868 | CHECK_STRING (name); |
1ab256cb | 869 | |
6b61353c KH |
870 | tem = Fstring_equal (name, ignore); |
871 | if (!NILP (tem)) | |
872 | return name; | |
1ab256cb | 873 | tem = Fget_buffer (name); |
265a9e55 | 874 | if (NILP (tem)) |
01050cb5 | 875 | return name; |
1ab256cb RM |
876 | |
877 | count = 1; | |
878 | while (1) | |
879 | { | |
666398f3 | 880 | sprintf (number, "<%"pI"d>", ++count); |
1ab256cb | 881 | gentemp = concat2 (name, build_string (number)); |
638e4fc3 | 882 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
883 | if (!NILP (tem)) |
884 | return gentemp; | |
1ab256cb | 885 | tem = Fget_buffer (gentemp); |
265a9e55 | 886 | if (NILP (tem)) |
01050cb5 | 887 | return gentemp; |
1ab256cb RM |
888 | } |
889 | } | |
890 | ||
891 | \f | |
a7ca3326 | 892 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
7ee72033 | 893 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
894 | BUFFER defaults to the current buffer. |
895 | Return nil if BUFFER has been killed. */) | |
5842a27b | 896 | (register Lisp_Object buffer) |
1ab256cb | 897 | { |
265a9e55 | 898 | if (NILP (buffer)) |
4b4deea2 | 899 | return BVAR (current_buffer, name); |
b7826503 | 900 | CHECK_BUFFER (buffer); |
4b4deea2 | 901 | return BVAR (XBUFFER (buffer), name); |
1ab256cb RM |
902 | } |
903 | ||
a7ca3326 | 904 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
7ee72033 MB |
905 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
906 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 907 | (register Lisp_Object buffer) |
1ab256cb | 908 | { |
265a9e55 | 909 | if (NILP (buffer)) |
4b4deea2 | 910 | return BVAR (current_buffer, filename); |
b7826503 | 911 | CHECK_BUFFER (buffer); |
4b4deea2 | 912 | return BVAR (XBUFFER (buffer), filename); |
1ab256cb RM |
913 | } |
914 | ||
336cd056 RS |
915 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
916 | 0, 1, 0, | |
7ee72033 | 917 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
918 | If BUFFER is not indirect, return nil. |
919 | BUFFER defaults to the current buffer. */) | |
5842a27b | 920 | (register Lisp_Object buffer) |
336cd056 RS |
921 | { |
922 | struct buffer *base; | |
923 | Lisp_Object base_buffer; | |
924 | ||
925 | if (NILP (buffer)) | |
926 | base = current_buffer->base_buffer; | |
927 | else | |
928 | { | |
b7826503 | 929 | CHECK_BUFFER (buffer); |
336cd056 RS |
930 | base = XBUFFER (buffer)->base_buffer; |
931 | } | |
932 | ||
933 | if (! base) | |
934 | return Qnil; | |
935 | XSETBUFFER (base_buffer, base); | |
936 | return base_buffer; | |
937 | } | |
938 | ||
a7ca3326 | 939 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 940 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
941 | doc: /* Return the value of VARIABLE in BUFFER. |
942 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 943 | is the default binding of the variable. */) |
5842a27b | 944 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
945 | { |
946 | register struct buffer *buf; | |
947 | register Lisp_Object result; | |
ad97b375 | 948 | struct Lisp_Symbol *sym; |
79aa712d | 949 | |
5e2ad10b | 950 | CHECK_SYMBOL (variable); |
ae69175b | 951 | CHECK_BUFFER (buffer); |
79aa712d | 952 | buf = XBUFFER (buffer); |
ce5b453a | 953 | sym = XSYMBOL (variable); |
79aa712d | 954 | |
ce5b453a SM |
955 | start: |
956 | switch (sym->redirect) | |
f0bac7de | 957 | { |
ce5b453a SM |
958 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
959 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
960 | case SYMBOL_LOCALIZED: | |
961 | { /* Look in local_var_alist. */ | |
962 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
963 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
4b4deea2 | 964 | result = Fassoc (variable, BVAR (buf, local_var_alist)); |
ce5b453a SM |
965 | if (!NILP (result)) |
966 | { | |
967 | if (blv->fwd) | |
968 | { /* What binding is loaded right now? */ | |
969 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 970 | |
ce5b453a SM |
971 | /* The value of the currently loaded binding is not |
972 | stored in it, but rather in the realvalue slot. | |
973 | Store that value into the binding it belongs to | |
974 | in case that is the one we are about to use. */ | |
f0bac7de | 975 | |
ce5b453a SM |
976 | XSETCDR (current_alist_element, |
977 | do_symval_forwarding (blv->fwd)); | |
978 | } | |
979 | /* Now get the (perhaps updated) value out of the binding. */ | |
980 | result = XCDR (result); | |
981 | } | |
982 | else | |
983 | result = Fdefault_value (variable); | |
984 | break; | |
985 | } | |
986 | case SYMBOL_FORWARDED: | |
987 | { | |
988 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
989 | if (BUFFER_OBJFWDP (fwd)) | |
990 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
991 | else | |
992 | result = Fdefault_value (variable); | |
993 | break; | |
994 | } | |
995 | default: abort (); | |
f0bac7de | 996 | } |
79aa712d | 997 | |
4c4dc0b0 KS |
998 | if (!EQ (result, Qunbound)) |
999 | return result; | |
79aa712d | 1000 | |
4c4dc0b0 | 1001 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
1002 | } |
1003 | ||
e1688f54 | 1004 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 1005 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
1006 | in special slots in the buffer object. */ |
1007 | ||
1008 | static Lisp_Object | |
d3da34e0 | 1009 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
1010 | { |
1011 | Lisp_Object result = Qnil; | |
1012 | register Lisp_Object tail; | |
4b4deea2 | 1013 | for (tail = BVAR (buf, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
e1688f54 RS |
1014 | { |
1015 | Lisp_Object val, elt; | |
1016 | ||
1017 | elt = XCAR (tail); | |
1018 | ||
1019 | /* Reference each variable in the alist in buf. | |
1020 | If inquiring about the current buffer, this gets the current values, | |
1021 | so store them into the alist so the alist is up to date. | |
1022 | If inquiring about some other buffer, this swaps out any values | |
1023 | for that buffer, making the alist up to date automatically. */ | |
1024 | val = find_symbol_value (XCAR (elt)); | |
1025 | /* Use the current buffer value only if buf is the current buffer. */ | |
1026 | if (buf != current_buffer) | |
1027 | val = XCDR (elt); | |
1028 | ||
0992bd9c CY |
1029 | result = Fcons (EQ (val, Qunbound) |
1030 | ? XCAR (elt) | |
1031 | : Fcons (XCAR (elt), val), | |
1032 | result); | |
e1688f54 RS |
1033 | } |
1034 | ||
1035 | return result; | |
1036 | } | |
1037 | ||
1ab256cb | 1038 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1039 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1040 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1041 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1042 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1043 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1044 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1045 | (register Lisp_Object buffer) |
1ab256cb RM |
1046 | { |
1047 | register struct buffer *buf; | |
553defa4 | 1048 | register Lisp_Object result; |
1ab256cb | 1049 | |
265a9e55 | 1050 | if (NILP (buffer)) |
1ab256cb RM |
1051 | buf = current_buffer; |
1052 | else | |
1053 | { | |
b7826503 | 1054 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1055 | buf = XBUFFER (buffer); |
1056 | } | |
1057 | ||
e1688f54 | 1058 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1059 | |
1ab256cb RM |
1060 | /* Add on all the variables stored in special slots. */ |
1061 | { | |
7c02e886 | 1062 | int offset, idx; |
1ab256cb | 1063 | |
3ee24aec SM |
1064 | /* buffer-local Lisp variables start at `undo_list', |
1065 | tho only the ones from `name' on are GC'd normally. */ | |
8a5c77bb PE |
1066 | for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER); |
1067 | offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER); | |
7c02e886 GM |
1068 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1069 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1070 | { |
7313acd0 GM |
1071 | idx = PER_BUFFER_IDX (offset); |
1072 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1073 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
0992bd9c CY |
1074 | { |
1075 | Lisp_Object sym = PER_BUFFER_SYMBOL (offset); | |
1076 | Lisp_Object val = PER_BUFFER_VALUE (buf, offset); | |
1077 | result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val), | |
1078 | result); | |
1079 | } | |
1ab256cb RM |
1080 | } |
1081 | } | |
553defa4 RS |
1082 | |
1083 | return result; | |
1ab256cb | 1084 | } |
1ab256cb | 1085 | \f |
a7ca3326 | 1086 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
efc7e75f | 1087 | 0, 1, 0, |
7ee72033 MB |
1088 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1089 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1090 | (register Lisp_Object buffer) |
1ab256cb RM |
1091 | { |
1092 | register struct buffer *buf; | |
265a9e55 | 1093 | if (NILP (buffer)) |
1ab256cb RM |
1094 | buf = current_buffer; |
1095 | else | |
1096 | { | |
b7826503 | 1097 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1098 | buf = XBUFFER (buffer); |
1099 | } | |
1100 | ||
336cd056 | 1101 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1102 | } |
1103 | ||
a7ca3326 | 1104 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
efc7e75f | 1105 | 1, 1, 0, |
7ee72033 MB |
1106 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1107 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1108 | (register Lisp_Object flag) |
1ab256cb RM |
1109 | { |
1110 | register int already; | |
1111 | register Lisp_Object fn; | |
8ec01c70 | 1112 | Lisp_Object buffer, window; |
1ab256cb RM |
1113 | |
1114 | #ifdef CLASH_DETECTION | |
1115 | /* If buffer becoming modified, lock the file. | |
1116 | If buffer becoming unmodified, unlock the file. */ | |
1117 | ||
4b4deea2 | 1118 | fn = BVAR (current_buffer, file_truename); |
90d456d2 | 1119 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1120 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
1ab256cb | 1121 | { |
336cd056 | 1122 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1123 | if (!already && !NILP (flag)) |
1ab256cb | 1124 | lock_file (fn); |
265a9e55 | 1125 | else if (already && NILP (flag)) |
1ab256cb RM |
1126 | unlock_file (fn); |
1127 | } | |
1128 | #endif /* CLASH_DETECTION */ | |
1129 | ||
0b5397c2 SM |
1130 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1131 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1132 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1133 | modify SAVE_MODIFF to affect one, we may affect the other | |
1134 | as well. | |
1135 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1136 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1137 | recent-auto-save-p from t to nil. | |
1138 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1139 | we risk changing recent-auto-save-p from nil to t. */ | |
1140 | SAVE_MODIFF = (NILP (flag) | |
1141 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1142 | ? MODIFF | |
1143 | /* Let's try to preserve recent-auto-save-p. */ | |
1144 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1145 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1146 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1147 | or increase MODIFF. */ | |
1148 | : MODIFF++); | |
177c0ea7 | 1149 | |
8ec01c70 GM |
1150 | /* Set update_mode_lines only if buffer is displayed in some window. |
1151 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1152 | state by recording/restoring the state around blocks of code. | |
1153 | Setting update_mode_lines makes redisplay consider all windows | |
1154 | (on all frames). Stealth fontification of buffers not displayed | |
1155 | would incur additional redisplay costs if we'd set | |
1156 | update_modes_lines unconditionally. | |
1157 | ||
1158 | Ideally, I think there should be another mechanism for fontifying | |
1159 | buffers without "modifying" buffers, or redisplay should be | |
1160 | smarter about updating the `*' in mode lines. --gerd */ | |
1161 | XSETBUFFER (buffer, current_buffer); | |
1162 | window = Fget_buffer_window (buffer, Qt); | |
1163 | if (WINDOWP (window)) | |
d57b83b3 GM |
1164 | { |
1165 | ++update_mode_lines; | |
1166 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1167 | } | |
177c0ea7 | 1168 | |
1ab256cb RM |
1169 | return flag; |
1170 | } | |
1171 | ||
a8c21b48 GM |
1172 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1173 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1174 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1175 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1176 | state of the current buffer. Use with care. */) |
5842a27b | 1177 | (Lisp_Object flag) |
a8c21b48 GM |
1178 | { |
1179 | #ifdef CLASH_DETECTION | |
1180 | Lisp_Object fn; | |
177c0ea7 | 1181 | |
a8c21b48 GM |
1182 | /* If buffer becoming modified, lock the file. |
1183 | If buffer becoming unmodified, unlock the file. */ | |
1184 | ||
4b4deea2 | 1185 | fn = BVAR (current_buffer, file_truename); |
a8c21b48 | 1186 | /* Test buffer-file-name so that binding it to nil is effective. */ |
4b4deea2 | 1187 | if (!NILP (fn) && ! NILP (BVAR (current_buffer, filename))) |
a8c21b48 GM |
1188 | { |
1189 | int already = SAVE_MODIFF < MODIFF; | |
1190 | if (!already && !NILP (flag)) | |
1191 | lock_file (fn); | |
1192 | else if (already && NILP (flag)) | |
1193 | unlock_file (fn); | |
1194 | } | |
1195 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1196 | |
a8c21b48 GM |
1197 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1198 | return flag; | |
1199 | } | |
1200 | ||
1ab256cb | 1201 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1202 | 0, 1, 0, |
7ee72033 | 1203 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1204 | Each buffer has a tick counter which is incremented each time the |
1205 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1206 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1207 | (register Lisp_Object buffer) |
1ab256cb RM |
1208 | { |
1209 | register struct buffer *buf; | |
265a9e55 | 1210 | if (NILP (buffer)) |
1ab256cb RM |
1211 | buf = current_buffer; |
1212 | else | |
1213 | { | |
b7826503 | 1214 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1215 | buf = XBUFFER (buffer); |
1216 | } | |
1217 | ||
1218 | return make_number (BUF_MODIFF (buf)); | |
1219 | } | |
3e145152 CY |
1220 | |
1221 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1222 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1223 | doc: /* Return BUFFER's character-change tick counter. | |
1224 | Each buffer has a character-change tick counter, which is set to the | |
1225 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1226 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1227 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1228 | you can tell whether a character change occurred in that buffer in |
1229 | between these calls. No argument or nil as argument means use current | |
1230 | buffer as BUFFER. */) | |
5842a27b | 1231 | (register Lisp_Object buffer) |
3e145152 CY |
1232 | { |
1233 | register struct buffer *buf; | |
1234 | if (NILP (buffer)) | |
1235 | buf = current_buffer; | |
1236 | else | |
1237 | { | |
1238 | CHECK_BUFFER (buffer); | |
1239 | buf = XBUFFER (buffer); | |
1240 | } | |
1241 | ||
1242 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1243 | } | |
1ab256cb | 1244 | \f |
01050cb5 | 1245 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1246 | "(list (read-string \"Rename buffer (to new name): \" \ |
1247 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1248 | current-prefix-arg)", | |
7ee72033 | 1249 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1250 | If second arg UNIQUE is nil or omitted, it is an error if a |
1251 | buffer named NEWNAME already exists. | |
1252 | If UNIQUE is non-nil, come up with a new name using | |
1253 | `generate-new-buffer-name'. | |
1254 | Interactively, you can set UNIQUE with a prefix argument. | |
1255 | We return the name we actually gave the buffer. | |
7ee72033 | 1256 | This does not change the name of the visited file (if any). */) |
5842a27b | 1257 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1258 | { |
1259 | register Lisp_Object tem, buf; | |
1260 | ||
b7826503 | 1261 | CHECK_STRING (newname); |
d59698c4 | 1262 | |
d5db4077 | 1263 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1264 | error ("Empty string is invalid as a buffer name"); |
1265 | ||
489c043a | 1266 | tem = Fget_buffer (newname); |
265a9e55 | 1267 | if (!NILP (tem)) |
01050cb5 | 1268 | { |
8801a864 KR |
1269 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1270 | rename the buffer automatically so you can create another | |
1271 | with the original name. It makes UNIQUE equivalent to | |
1272 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1273 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
4b4deea2 | 1274 | return BVAR (current_buffer, name); |
3bd779aa | 1275 | if (!NILP (unique)) |
4b4deea2 | 1276 | newname = Fgenerate_new_buffer_name (newname, BVAR (current_buffer, name)); |
01050cb5 | 1277 | else |
d5db4077 | 1278 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1279 | } |
1ab256cb | 1280 | |
4b4deea2 | 1281 | BVAR (current_buffer, name) = newname; |
76f590d7 JB |
1282 | |
1283 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1284 | any windows displaying current_buffer will stay unchanged. */ | |
1285 | update_mode_lines++; | |
1286 | ||
67180c6a | 1287 | XSETBUFFER (buf, current_buffer); |
489c043a | 1288 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
4b4deea2 TT |
1289 | if (NILP (BVAR (current_buffer, filename)) |
1290 | && !NILP (BVAR (current_buffer, auto_save_file_name))) | |
1ab256cb | 1291 | call0 (intern ("rename-auto-save-file")); |
9397e56f MR |
1292 | |
1293 | /* Run buffer-list-update-hook. */ | |
1294 | if (!NILP (Vrun_hooks)) | |
1295 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1296 | ||
fb5eba9c | 1297 | /* Refetch since that last call may have done GC. */ |
4b4deea2 | 1298 | return BVAR (current_buffer, name); |
1ab256cb RM |
1299 | } |
1300 | ||
a7ca3326 | 1301 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1302 | doc: /* Return most recently selected buffer other than BUFFER. |
9397e56f MR |
1303 | Buffers not visible in windows are preferred to visible buffers, unless |
1304 | optional second argument VISIBLE-OK is non-nil. Ignore the argument | |
1305 | BUFFER unless it denotes a live buffer. If the optional third argument | |
1306 | FRAME is non-nil, use that frame's buffer list instead of the selected | |
1307 | frame's buffer list. | |
1308 | ||
1309 | The buffer is found by scanning the selected or specified frame's buffer | |
1310 | list first, followed by the list of all buffers. If no other buffer | |
1311 | exists, return the buffer `*scratch*' (creating it if necessary). */) | |
5842a27b | 1312 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1313 | { |
9397e56f MR |
1314 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
1315 | Lisp_Object tail, buf, pred; | |
1316 | Lisp_Object notsogood = Qnil; | |
1ab256cb | 1317 | |
773fbdb9 | 1318 | if (NILP (frame)) |
9ba9623d | 1319 | frame = selected_frame; |
773fbdb9 | 1320 | |
d234d13e JL |
1321 | CHECK_FRAME (frame); |
1322 | ||
773fbdb9 | 1323 | pred = frame_buffer_predicate (frame); |
9397e56f MR |
1324 | /* Consider buffers that have been seen in the frame first. */ |
1325 | tail = XFRAME (frame)->buffer_list; | |
1326 | for (; CONSP (tail); tail = XCDR (tail)) | |
7962a441 | 1327 | { |
9397e56f MR |
1328 | buf = XCAR (tail); |
1329 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1330 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1331 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1332 | /* If the frame has a buffer_predicate, disregard buffers that | |
1333 | don't fit the predicate. */ | |
1334 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1335 | { | |
1336 | if (!NILP (visible_ok) | |
1337 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1338 | return buf; | |
1339 | else if (NILP (notsogood)) | |
1340 | notsogood = buf; | |
1341 | } | |
7962a441 | 1342 | } |
7962a441 | 1343 | |
9397e56f MR |
1344 | /* Consider alist of all buffers next. */ |
1345 | tail = Vbuffer_alist; | |
6d70a280 | 1346 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1347 | { |
6d70a280 | 1348 | buf = Fcdr (XCAR (tail)); |
9397e56f MR |
1349 | if (BUFFERP (buf) && !EQ (buf, buffer) |
1350 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1351 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ') | |
1352 | /* If the frame has a buffer_predicate, disregard buffers that | |
1353 | don't fit the predicate. */ | |
1354 | && (NILP (pred) || !NILP (call1 (pred, buf)))) | |
1355 | { | |
1356 | if (!NILP (visible_ok) | |
1357 | || NILP (Fget_buffer_window (buf, Qvisible))) | |
1358 | return buf; | |
1359 | else if (NILP (notsogood)) | |
1360 | notsogood = buf; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | if (!NILP (notsogood)) | |
1365 | return notsogood; | |
1366 | else | |
1367 | { | |
1368 | buf = Fget_buffer (build_string ("*scratch*")); | |
6b61353c | 1369 | if (NILP (buf)) |
04ae1b48 | 1370 | { |
9397e56f MR |
1371 | buf = Fget_buffer_create (build_string ("*scratch*")); |
1372 | Fset_buffer_major_mode (buf); | |
04ae1b48 | 1373 | } |
9397e56f MR |
1374 | return buf; |
1375 | } | |
1376 | } | |
04ae1b48 | 1377 | |
9397e56f MR |
1378 | /* The following function is a safe variant of Fother_buffer: It doesn't |
1379 | pay attention to any frame-local buffer lists, doesn't care about | |
1380 | visibility of buffers, and doesn't evaluate any frame predicates. */ | |
1381 | ||
1382 | Lisp_Object | |
1383 | other_buffer_safely (Lisp_Object buffer) | |
1384 | { | |
1385 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); | |
1386 | Lisp_Object tail, buf; | |
1387 | ||
1388 | tail = Vbuffer_alist; | |
1389 | for (; CONSP (tail); tail = XCDR (tail)) | |
1390 | { | |
1391 | buf = Fcdr (XCAR (tail)); | |
1392 | if (BUFFERP (buf) && !EQ (buf, buffer) | |
1393 | && !NILP (BVAR (XBUFFER (buf), name)) | |
1394 | && (SREF (BVAR (XBUFFER (buf), name), 0) != ' ')) | |
1ab256cb | 1395 | return buf; |
1ab256cb | 1396 | } |
9397e56f | 1397 | |
dba1a30a GM |
1398 | buf = Fget_buffer (build_string ("*scratch*")); |
1399 | if (NILP (buf)) | |
1400 | { | |
1401 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1402 | Fset_buffer_major_mode (buf); | |
1403 | } | |
9397e56f | 1404 | |
89132f25 | 1405 | return buf; |
1ab256cb RM |
1406 | } |
1407 | \f | |
a7ca3326 | 1408 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1ab256cb | 1409 | 0, 1, "", |
7ee72033 MB |
1410 | doc: /* Start keeping undo information for buffer BUFFER. |
1411 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1412 | (register Lisp_Object buffer) |
1ab256cb | 1413 | { |
ffd56f97 | 1414 | Lisp_Object real_buffer; |
1ab256cb | 1415 | |
ffd56f97 | 1416 | if (NILP (buffer)) |
67180c6a | 1417 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1418 | else |
1419 | { | |
ffd56f97 JB |
1420 | real_buffer = Fget_buffer (buffer); |
1421 | if (NILP (real_buffer)) | |
1422 | nsberror (buffer); | |
1ab256cb RM |
1423 | } |
1424 | ||
4b4deea2 TT |
1425 | if (EQ (BVAR (XBUFFER (real_buffer), undo_list), Qt)) |
1426 | BVAR (XBUFFER (real_buffer), undo_list) = Qnil; | |
1ab256cb RM |
1427 | |
1428 | return Qnil; | |
1429 | } | |
1430 | ||
1431 | /* | |
00b3c7ac | 1432 | DEFVAR_LISP ("kill-buffer-hook", ..., "\ |
1ab256cb RM |
1433 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
1434 | The buffer being killed will be current while the hook is running.\n\ | |
1435 | See `kill-buffer'." | |
1436 | */ | |
a7ca3326 | 1437 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
c8804c4f MR |
1438 | doc: /* Kill buffer BUFFER-OR-NAME. |
1439 | The argument may be a buffer or the name of an existing buffer. | |
1440 | Argument nil or omitted means kill the current buffer. Return t if the | |
1441 | buffer is actually killed, nil otherwise. | |
1442 | ||
1443 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1444 | windows currently displaying the buffer to be killed. The functions in | |
1445 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1446 | the current buffer. If any of them returns nil, the buffer is not | |
1447 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1448 | actually killed. The buffer being killed will be current while the hook | |
1449 | is running. | |
018ba359 PJ |
1450 | |
1451 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1452 | with SIGHUP. */) |
5842a27b | 1453 | (Lisp_Object buffer_or_name) |
1ab256cb | 1454 | { |
c8804c4f | 1455 | Lisp_Object buffer; |
1ab256cb RM |
1456 | register struct buffer *b; |
1457 | register Lisp_Object tem; | |
1458 | register struct Lisp_Marker *m; | |
6af718a4 | 1459 | struct gcpro gcpro1; |
1ab256cb | 1460 | |
c8804c4f MR |
1461 | if (NILP (buffer_or_name)) |
1462 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1463 | else |
c8804c4f MR |
1464 | buffer = Fget_buffer (buffer_or_name); |
1465 | if (NILP (buffer)) | |
1466 | nsberror (buffer_or_name); | |
1ab256cb | 1467 | |
c8804c4f | 1468 | b = XBUFFER (buffer); |
1ab256cb | 1469 | |
4a4a9db5 | 1470 | /* Avoid trouble for buffer already dead. */ |
4b4deea2 | 1471 | if (NILP (BVAR (b, name))) |
4a4a9db5 KH |
1472 | return Qnil; |
1473 | ||
1ab256cb | 1474 | /* Query if the buffer is still modified. */ |
4b4deea2 | 1475 | if (INTERACTIVE && !NILP (BVAR (b, filename)) |
336cd056 | 1476 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1477 | { |
c8804c4f | 1478 | GCPRO1 (buffer); |
5c4930b0 | 1479 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
4b4deea2 | 1480 | BVAR (b, name), make_number (0))); |
1ab256cb | 1481 | UNGCPRO; |
265a9e55 | 1482 | if (NILP (tem)) |
1ab256cb RM |
1483 | return Qnil; |
1484 | } | |
1485 | ||
dcdffbf6 | 1486 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1487 | { |
aed13378 | 1488 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1489 | Lisp_Object arglist[1]; |
1ab256cb RM |
1490 | |
1491 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1492 | set_buffer_internal (b); | |
dcdffbf6 RS |
1493 | |
1494 | /* First run the query functions; if any query is answered no, | |
1495 | don't kill the buffer. */ | |
5b20caf0 | 1496 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1497 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1498 | if (NILP (tem)) | |
5b20caf0 | 1499 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1500 | |
1501 | /* Then run the hooks. */ | |
f1597a3a | 1502 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1503 | unbind_to (count, Qnil); |
1504 | } | |
1505 | ||
1506 | /* We have no more questions to ask. Verify that it is valid | |
1507 | to kill the buffer. This must be done after the questions | |
1508 | since anything can happen within do_yes_or_no_p. */ | |
1509 | ||
1510 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1511 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1512 | return Qnil; |
1513 | ||
4b4deea2 | 1514 | if (NILP (BVAR (b, name))) |
1ab256cb RM |
1515 | return Qnil; |
1516 | ||
336cd056 RS |
1517 | /* When we kill a base buffer, kill all its indirect buffers. |
1518 | We do it at this stage so nothing terrible happens if they | |
1519 | ask questions or their hooks get errors. */ | |
1520 | if (! b->base_buffer) | |
1521 | { | |
1522 | struct buffer *other; | |
1523 | ||
c8804c4f | 1524 | GCPRO1 (buffer); |
336cd056 | 1525 | |
eab3844f | 1526 | for (other = all_buffers; other; other = other->header.next.buffer) |
4a4a9db5 KH |
1527 | /* all_buffers contains dead buffers too; |
1528 | don't re-kill them. */ | |
4b4deea2 | 1529 | if (other->base_buffer == b && !NILP (BVAR (other, name))) |
336cd056 | 1530 | { |
8f54f30a PE |
1531 | Lisp_Object buf; |
1532 | XSETBUFFER (buf, other); | |
1533 | Fkill_buffer (buf); | |
336cd056 RS |
1534 | } |
1535 | ||
1536 | UNGCPRO; | |
1537 | } | |
177c0ea7 | 1538 | |
56e2e794 MR |
1539 | /* Run replace_buffer_in_windows before making another buffer current |
1540 | since set-window-buffer-start-and-point will refuse to make another | |
1541 | buffer current if the selected window does not show the current | |
1542 | buffer. (Bug#10114) */ | |
1543 | replace_buffer_in_windows (buffer); | |
1544 | ||
1545 | /* Make this buffer not be current. | |
1ab256cb RM |
1546 | In the process, notice if this is the sole visible buffer |
1547 | and give up if so. */ | |
1548 | if (b == current_buffer) | |
1549 | { | |
c8804c4f | 1550 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1551 | Fset_buffer (tem); |
1552 | if (b == current_buffer) | |
1553 | return Qnil; | |
1554 | } | |
1555 | ||
77270fac GM |
1556 | /* Notice if the buffer to kill is the sole visible buffer |
1557 | when we're currently in the mini-buffer, and give up if so. */ | |
1558 | XSETBUFFER (tem, current_buffer); | |
1559 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1560 | { | |
c8804c4f MR |
1561 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1562 | if (EQ (buffer, tem)) | |
77270fac GM |
1563 | return Qnil; |
1564 | } | |
1565 | ||
1ab256cb RM |
1566 | /* Now there is no question: we can kill the buffer. */ |
1567 | ||
1568 | #ifdef CLASH_DETECTION | |
1569 | /* Unlock this buffer's file, if it is locked. */ | |
1570 | unlock_buffer (b); | |
1571 | #endif /* CLASH_DETECTION */ | |
1572 | ||
c8804c4f MR |
1573 | GCPRO1 (buffer); |
1574 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1575 | UNGCPRO; |
1576 | ||
1577 | /* Killing buffer processes may run sentinels which may | |
1578 | have called kill-buffer. */ | |
1579 | ||
4b4deea2 | 1580 | if (NILP (BVAR (b, name))) |
49da74e6 KS |
1581 | return Qnil; |
1582 | ||
9397e56f MR |
1583 | /* These may run Lisp code and into infinite loops (if someone |
1584 | insisted on circular lists) so allow quitting here. */ | |
9397e56f MR |
1585 | frames_discard_buffer (buffer); |
1586 | ||
b93fb365 | 1587 | clear_charpos_cache (b); |
1ab256cb RM |
1588 | |
1589 | tem = Vinhibit_quit; | |
1590 | Vinhibit_quit = Qt; | |
9397e56f | 1591 | /* Remove the buffer from the list of all buffers. */ |
c8804c4f | 1592 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); |
9397e56f MR |
1593 | /* If replace_buffer_in_windows didn't do its job correctly fix that |
1594 | now. */ | |
1595 | replace_buffer_in_windows_safely (buffer); | |
1ab256cb RM |
1596 | Vinhibit_quit = tem; |
1597 | ||
9cf712eb RS |
1598 | /* Delete any auto-save file, if we saved it in this session. |
1599 | But not if the buffer is modified. */ | |
4b4deea2 | 1600 | if (STRINGP (BVAR (b, auto_save_file_name)) |
0b5397c2 SM |
1601 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1602 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1603 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1604 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb | 1605 | { |
8f54f30a PE |
1606 | Lisp_Object delete; |
1607 | delete = Fsymbol_value (intern ("delete-auto-save-files")); | |
1608 | if (! NILP (delete)) | |
4b4deea2 | 1609 | internal_delete_file (BVAR (b, auto_save_file_name)); |
1ab256cb RM |
1610 | } |
1611 | ||
4a4a9db5 KH |
1612 | if (b->base_buffer) |
1613 | { | |
1614 | /* Unchain all markers that belong to this indirect buffer. | |
1615 | Don't unchain the markers that belong to the base buffer | |
1616 | or its other indirect buffers. */ | |
65745fad | 1617 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1618 | { |
65745fad | 1619 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1620 | if (m->buffer == b) |
65745fad SM |
1621 | unchain_marker (m); |
1622 | m = next; | |
4a4a9db5 KH |
1623 | } |
1624 | } | |
1625 | else | |
1ab256cb | 1626 | { |
4a4a9db5 | 1627 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1628 | and leave them pointing nowhere. */ |
65745fad | 1629 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1630 | { |
65745fad | 1631 | struct Lisp_Marker *next = m->next; |
336cd056 | 1632 | m->buffer = 0; |
65745fad SM |
1633 | m->next = NULL; |
1634 | m = next; | |
336cd056 | 1635 | } |
65745fad | 1636 | BUF_MARKERS (b) = NULL; |
336cd056 | 1637 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1638 | |
1639 | /* Perhaps we should explicitly free the interval tree here... */ | |
1640 | } | |
33f7013e | 1641 | |
2f3f993b RS |
1642 | /* Reset the local variables, so that this buffer's local values |
1643 | won't be protected from GC. They would be protected | |
e4769531 | 1644 | if they happened to remain cached in their symbols. |
2f3f993b RS |
1645 | This gets rid of them for certain. */ |
1646 | swap_out_buffer_local_variables (b); | |
13de9290 | 1647 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1648 | |
4b4deea2 | 1649 | BVAR (b, name) = Qnil; |
336cd056 | 1650 | |
9ac0d9e0 | 1651 | BLOCK_INPUT; |
336cd056 | 1652 | if (! b->base_buffer) |
b86af064 | 1653 | free_buffer_text (b); |
336cd056 | 1654 | |
28e969dd JB |
1655 | if (b->newline_cache) |
1656 | { | |
1657 | free_region_cache (b->newline_cache); | |
1658 | b->newline_cache = 0; | |
1659 | } | |
1660 | if (b->width_run_cache) | |
1661 | { | |
1662 | free_region_cache (b->width_run_cache); | |
1663 | b->width_run_cache = 0; | |
1664 | } | |
4b4deea2 | 1665 | BVAR (b, width_table) = Qnil; |
9ac0d9e0 | 1666 | UNBLOCK_INPUT; |
4b4deea2 | 1667 | BVAR (b, undo_list) = Qnil; |
1ab256cb | 1668 | |
9397e56f MR |
1669 | /* Run buffer-list-update-hook. */ |
1670 | if (!NILP (Vrun_hooks)) | |
1671 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1672 | ||
1ab256cb RM |
1673 | return Qt; |
1674 | } | |
1675 | \f | |
9397e56f MR |
1676 | /* Move association for BUFFER to the front of buffer (a)lists. Since |
1677 | we do this each time BUFFER is selected visibly, the more recently | |
1678 | selected buffers are always closer to the front of those lists. This | |
1679 | means that other_buffer is more likely to choose a relevant buffer. | |
1680 | ||
1681 | Note that this moves BUFFER to the front of the buffer lists of the | |
1682 | selected frame even if BUFFER is not shown there. If BUFFER is not | |
1683 | shown in the selected frame, consider the present behavior a feature. | |
1684 | `select-window' gets this right since it shows BUFFER in the selected | |
1685 | window when calling us. */ | |
1ab256cb | 1686 | |
01136e9b | 1687 | void |
9397e56f | 1688 | record_buffer (Lisp_Object buffer) |
1ab256cb | 1689 | { |
4475bec4 | 1690 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1691 | register struct frame *f = XFRAME (selected_frame); |
1ab256cb | 1692 | |
9397e56f | 1693 | CHECK_BUFFER (buffer); |
1ab256cb | 1694 | |
9397e56f MR |
1695 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1696 | Don't allow quitting since this might leave the buffer list in an | |
1697 | inconsistent state. */ | |
1698 | tem = Vinhibit_quit; | |
1699 | Vinhibit_quit = Qt; | |
1700 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1701 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1702 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1703 | XSETCDR (aelt_cons, Vbuffer_alist); |
1704 | Vbuffer_alist = aelt_cons; | |
9397e56f | 1705 | Vinhibit_quit = tem; |
1ab256cb | 1706 | |
9397e56f MR |
1707 | /* Update buffer list of selected frame. */ |
1708 | f->buffer_list = Fcons (buffer, Fdelq (buffer, f->buffer_list)); | |
1709 | f->buried_buffer_list = Fdelq (buffer, f->buried_buffer_list); | |
177c0ea7 | 1710 | |
9397e56f MR |
1711 | /* Run buffer-list-update-hook. */ |
1712 | if (!NILP (Vrun_hooks)) | |
1713 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1714 | } | |
7962a441 | 1715 | |
7962a441 | 1716 | |
e4ed06f1 CY |
1717 | /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the |
1718 | buffer is killed. For the selected frame's buffer list this moves | |
1719 | BUFFER to its end even if it was never shown in that frame. If | |
1720 | this happens we have a feature, hence `unrecord-buffer' should be | |
1721 | called only when BUFFER was shown in the selected frame. */ | |
7962a441 | 1722 | |
e4ed06f1 CY |
1723 | DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal, |
1724 | 1, 1, 0, | |
1725 | doc: /* Move BUFFER to the end of the buffer list. */) | |
9397e56f MR |
1726 | (Lisp_Object buffer) |
1727 | { | |
4475bec4 | 1728 | Lisp_Object aelt, aelt_cons, tem; |
9397e56f | 1729 | register struct frame *f = XFRAME (selected_frame); |
7962a441 | 1730 | |
9397e56f | 1731 | CHECK_BUFFER (buffer); |
177c0ea7 | 1732 | |
9397e56f MR |
1733 | /* Update Vbuffer_alist (we know that it has an entry for BUFFER). |
1734 | Don't allow quitting since this might leave the buffer list in an | |
1735 | inconsistent state. */ | |
1736 | tem = Vinhibit_quit; | |
1737 | Vinhibit_quit = Qt; | |
1738 | aelt = Frassq (buffer, Vbuffer_alist); | |
4475bec4 | 1739 | aelt_cons = Fmemq (aelt, Vbuffer_alist); |
9397e56f | 1740 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
4475bec4 PE |
1741 | XSETCDR (aelt_cons, Qnil); |
1742 | Vbuffer_alist = nconc2 (Vbuffer_alist, aelt_cons); | |
9397e56f MR |
1743 | Vinhibit_quit = tem; |
1744 | ||
1745 | /* Update buffer lists of selected frame. */ | |
1746 | f->buffer_list = Fdelq (buffer, f->buffer_list); | |
1747 | f->buried_buffer_list = Fcons (buffer, Fdelq (buffer, f->buried_buffer_list)); | |
1748 | ||
1749 | /* Run buffer-list-update-hook. */ | |
1750 | if (!NILP (Vrun_hooks)) | |
1751 | call1 (Vrun_hooks, Qbuffer_list_update_hook); | |
1752 | ||
e4ed06f1 | 1753 | return Qnil; |
1ab256cb RM |
1754 | } |
1755 | ||
a9ee7a59 | 1756 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1757 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1758 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1759 | according to `default-major-mode'. |
018ba359 | 1760 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1761 | the current buffer's major mode. */) |
5842a27b | 1762 | (Lisp_Object buffer) |
a9ee7a59 KH |
1763 | { |
1764 | int count; | |
1765 | Lisp_Object function; | |
1766 | ||
ea4fddd8 JB |
1767 | CHECK_BUFFER (buffer); |
1768 | ||
4b4deea2 TT |
1769 | if (STRINGP (BVAR (XBUFFER (buffer), name)) |
1770 | && strcmp (SSDATA (BVAR (XBUFFER (buffer), name)), "*scratch*") == 0) | |
71a0f2c6 GM |
1771 | function = find_symbol_value (intern ("initial-major-mode")); |
1772 | else | |
1773 | { | |
4b4deea2 | 1774 | function = BVAR (&buffer_defaults, major_mode); |
71a0f2c6 | 1775 | if (NILP (function) |
4b4deea2 TT |
1776 | && NILP (Fget (BVAR (current_buffer, major_mode), Qmode_class))) |
1777 | function = BVAR (current_buffer, major_mode); | |
71a0f2c6 | 1778 | } |
177c0ea7 | 1779 | |
48265e61 DL |
1780 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1781 | return Qnil; | |
1782 | ||
aed13378 | 1783 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1784 | |
48265e61 DL |
1785 | /* To select a nonfundamental mode, |
1786 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1787 | |
1788 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1789 | ||
a2428fa2 | 1790 | Fset_buffer (buffer); |
48265e61 | 1791 | call0 (function); |
a9ee7a59 KH |
1792 | |
1793 | return unbind_to (count, Qnil); | |
1794 | } | |
1795 | ||
a7ca3326 | 1796 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1797 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1798 | (void) |
1ab256cb RM |
1799 | { |
1800 | register Lisp_Object buf; | |
67180c6a | 1801 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1802 | return buf; |
1803 | } | |
1804 | \f | |
7ec44ec6 GM |
1805 | /* Set the current buffer to B. |
1806 | ||
1807 | We previously set windows_or_buffers_changed here to invalidate | |
1808 | global unchanged information in beg_unchanged and end_unchanged. | |
1809 | This is no longer necessary because we now compute unchanged | |
1810 | information on a buffer-basis. Every action affecting other | |
1811 | windows than the selected one requires a select_window at some | |
1812 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1813 | |
1814 | void | |
d3da34e0 | 1815 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1816 | { |
b5a225b4 | 1817 | if (current_buffer != b) |
7ec44ec6 | 1818 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1819 | } |
1820 | ||
1821 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1822 | This is used by redisplay. */ | |
1823 | ||
1824 | void | |
d3da34e0 | 1825 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1826 | { |
1827 | register struct buffer *old_buf; | |
ce5b453a | 1828 | register Lisp_Object tail; |
c7aa5005 | 1829 | |
b86af064 | 1830 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1831 | if (b->text->beg == NULL) |
b86af064 GM |
1832 | enlarge_buffer_text (b, 0); |
1833 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1834 | |
c7aa5005 KH |
1835 | if (current_buffer == b) |
1836 | return; | |
1837 | ||
1ab256cb RM |
1838 | old_buf = current_buffer; |
1839 | current_buffer = b; | |
1840 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1841 | ||
336cd056 RS |
1842 | if (old_buf) |
1843 | { | |
1844 | /* Put the undo list back in the base buffer, so that it appears | |
1845 | that an indirect buffer shares the undo list of its base. */ | |
1846 | if (old_buf->base_buffer) | |
4b4deea2 | 1847 | BVAR (old_buf->base_buffer, undo_list) = BVAR (old_buf, undo_list); |
336cd056 RS |
1848 | |
1849 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1850 | when it is not current, update them now. */ | |
cffc6f3b | 1851 | record_buffer_markers (old_buf); |
336cd056 RS |
1852 | } |
1853 | ||
1854 | /* Get the undo list from the base buffer, so that it appears | |
1855 | that an indirect buffer shares the undo list of its base. */ | |
1856 | if (b->base_buffer) | |
4b4deea2 | 1857 | BVAR (b, undo_list) = BVAR (b->base_buffer, undo_list); |
336cd056 RS |
1858 | |
1859 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1860 | when it is not current, fetch them now. */ | |
cffc6f3b | 1861 | fetch_buffer_markers (b); |
336cd056 | 1862 | |
1ab256cb RM |
1863 | /* Look down buffer's list of local Lisp variables |
1864 | to find and update any that forward into C variables. */ | |
1865 | ||
ce5b453a | 1866 | do |
1ab256cb | 1867 | { |
4b4deea2 | 1868 | for (tail = BVAR (b, local_var_alist); CONSP (tail); tail = XCDR (tail)) |
ce5b453a SM |
1869 | { |
1870 | Lisp_Object var = XCAR (XCAR (tail)); | |
1871 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1872 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1873 | && SYMBOL_BLV (sym)->fwd) | |
1874 | /* Just reference the variable | |
1875 | to cause it to become set for this buffer. */ | |
1876 | Fsymbol_value (var); | |
1877 | } | |
1ab256cb | 1878 | } |
1ab256cb | 1879 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1880 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1881 | } |
1882 | ||
336cd056 | 1883 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1884 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1885 | |
1886 | void | |
d3da34e0 | 1887 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1888 | { |
1889 | register struct buffer *old_buf; | |
1890 | ||
1891 | if (current_buffer == b) | |
1892 | return; | |
1893 | ||
1894 | old_buf = current_buffer; | |
1895 | current_buffer = b; | |
1896 | ||
cffc6f3b CY |
1897 | /* If the old current buffer has markers to record PT, BEGV and ZV |
1898 | when it is not current, update them now. */ | |
1899 | record_buffer_markers (old_buf); | |
336cd056 RS |
1900 | |
1901 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1902 | when it is not current, fetch them now. */ | |
cffc6f3b | 1903 | fetch_buffer_markers (b); |
336cd056 RS |
1904 | } |
1905 | ||
a7ca3326 | 1906 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1907 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1908 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1909 | also `save-excursion' when you want to make a buffer current | |
1910 | temporarily. This function does not display the buffer, so its effect | |
1911 | ends when the current command terminates. Use `switch-to-buffer' or | |
1912 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1913 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1914 | { |
c8804c4f MR |
1915 | register Lisp_Object buffer; |
1916 | buffer = Fget_buffer (buffer_or_name); | |
1917 | if (NILP (buffer)) | |
1918 | nsberror (buffer_or_name); | |
4b4deea2 | 1919 | if (NILP (BVAR (XBUFFER (buffer), name))) |
1ab256cb | 1920 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1921 | set_buffer_internal (XBUFFER (buffer)); |
1922 | return buffer; | |
1ab256cb | 1923 | } |
d0628b06 RS |
1924 | |
1925 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1926 | ||
1927 | Lisp_Object | |
d3da34e0 | 1928 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 | 1929 | { |
4b4deea2 | 1930 | if (! NILP (BVAR (XBUFFER (buffer), name))) |
d0628b06 RS |
1931 | Fset_buffer (buffer); |
1932 | return Qnil; | |
1933 | } | |
1ab256cb | 1934 | \f |
a7ca3326 | 1935 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
1ab256cb | 1936 | Sbarf_if_buffer_read_only, 0, 0, 0, |
7ee72033 | 1937 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1938 | (void) |
1ab256cb | 1939 | { |
4b4deea2 | 1940 | if (!NILP (BVAR (current_buffer, read_only)) |
a96b68f1 | 1941 | && NILP (Vinhibit_read_only)) |
4c4dc0b0 | 1942 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1943 | return Qnil; |
1944 | } | |
1ab256cb | 1945 | \f |
a7ca3326 | 1946 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 1947 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 1948 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 1949 | so the buffer is truly empty after this. */) |
5842a27b | 1950 | (void) |
1ab256cb RM |
1951 | { |
1952 | Fwiden (); | |
c0d9a0c3 GM |
1953 | |
1954 | del_range (BEG, Z); | |
c280bc6a | 1955 | |
1ab256cb RM |
1956 | current_buffer->last_window_start = 1; |
1957 | /* Prevent warnings, or suspension of auto saving, that would happen | |
1958 | if future size is less than past size. Use of erase-buffer | |
1959 | implies that the future text is not really related to the past text. */ | |
4b4deea2 | 1960 | XSETFASTINT (BVAR (current_buffer, save_length), 0); |
1ab256cb RM |
1961 | return Qnil; |
1962 | } | |
1963 | ||
01136e9b | 1964 | void |
d3da34e0 | 1965 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 1966 | { |
b7826503 PJ |
1967 | CHECK_NUMBER_COERCE_MARKER (*b); |
1968 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
1969 | |
1970 | if (XINT (*b) > XINT (*e)) | |
1971 | { | |
03192067 KH |
1972 | Lisp_Object tem; |
1973 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
1974 | } |
1975 | ||
1976 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
1977 | && XINT (*e) <= ZV)) | |
1978 | args_out_of_range (*b, *e); | |
1979 | } | |
1980 | \f | |
b05525fa RS |
1981 | /* Advance BYTE_POS up to a character boundary |
1982 | and return the adjusted position. */ | |
1983 | ||
0ceccced | 1984 | static EMACS_INT |
145582a0 | 1985 | advance_to_char_boundary (EMACS_INT byte_pos) |
b05525fa | 1986 | { |
f8449323 | 1987 | int c; |
b05525fa | 1988 | |
f8449323 RS |
1989 | if (byte_pos == BEG) |
1990 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 1991 | return BEG; |
f8449323 RS |
1992 | |
1993 | c = FETCH_BYTE (byte_pos); | |
1994 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 1995 | { |
1be6387d | 1996 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 1997 | multibyte sequence. */ |
145582a0 | 1998 | EMACS_INT orig_byte_pos = byte_pos; |
a9bcded1 KH |
1999 | |
2000 | do | |
2001 | { | |
2002 | byte_pos--; | |
2003 | c = FETCH_BYTE (byte_pos); | |
2004 | } | |
2005 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2006 | INC_POS (byte_pos); |
a9bcded1 KH |
2007 | if (byte_pos < orig_byte_pos) |
2008 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2009 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2010 | surely advance to the correct character boundary. If C is | |
2011 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2012 | } |
2013 | ||
20773569 | 2014 | return byte_pos; |
b05525fa RS |
2015 | } |
2016 | ||
baae5c2d | 2017 | #ifdef REL_ALLOC |
f57e2426 | 2018 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2019 | #endif /* REL_ALLOC */ |
2020 | ||
13cda5f9 SM |
2021 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2022 | 1, 1, 0, | |
2023 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2024 | (Lisp_Object buffer) |
13cda5f9 SM |
2025 | { |
2026 | struct buffer *other_buffer; | |
2027 | CHECK_BUFFER (buffer); | |
2028 | other_buffer = XBUFFER (buffer); | |
2029 | ||
4b4deea2 | 2030 | if (NILP (BVAR (other_buffer, name))) |
409f2919 | 2031 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2032 | |
13cda5f9 SM |
2033 | /* Actually, it probably works just fine. |
2034 | * if (other_buffer == current_buffer) | |
2035 | * error ("Cannot swap a buffer's text with itself"); */ | |
2036 | ||
2037 | /* Actually, this may be workable as well, tho probably only if they're | |
2038 | *both* indirect. */ | |
2039 | if (other_buffer->base_buffer | |
2040 | || current_buffer->base_buffer) | |
2041 | error ("Cannot swap indirect buffers's text"); | |
2042 | ||
2043 | { /* This is probably harder to make work. */ | |
2044 | struct buffer *other; | |
eab3844f | 2045 | for (other = all_buffers; other; other = other->header.next.buffer) |
13cda5f9 SM |
2046 | if (other->base_buffer == other_buffer |
2047 | || other->base_buffer == current_buffer) | |
2048 | error ("One of the buffers to swap has indirect buffers"); | |
2049 | } | |
2050 | ||
2051 | #define swapfield(field, type) \ | |
2052 | do { \ | |
2053 | type tmp##field = other_buffer->field; \ | |
2054 | other_buffer->field = current_buffer->field; \ | |
2055 | current_buffer->field = tmp##field; \ | |
2056 | } while (0) | |
5d8ea120 TT |
2057 | #define swapfield_(field, type) \ |
2058 | do { \ | |
4b4deea2 TT |
2059 | type tmp##field = BVAR (other_buffer, field); \ |
2060 | BVAR (other_buffer, field) = BVAR (current_buffer, field); \ | |
2061 | BVAR (current_buffer, field) = tmp##field; \ | |
5d8ea120 | 2062 | } while (0) |
13cda5f9 SM |
2063 | |
2064 | swapfield (own_text, struct buffer_text); | |
2065 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2066 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2067 | #ifdef REL_ALLOC |
40b615d6 JR |
2068 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2069 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2070 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2071 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2072 | #endif /* REL_ALLOC */ |
2073 | ||
13cda5f9 SM |
2074 | swapfield (pt, EMACS_INT); |
2075 | swapfield (pt_byte, EMACS_INT); | |
2076 | swapfield (begv, EMACS_INT); | |
2077 | swapfield (begv_byte, EMACS_INT); | |
2078 | swapfield (zv, EMACS_INT); | |
2079 | swapfield (zv_byte, EMACS_INT); | |
2080 | eassert (!current_buffer->base_buffer); | |
2081 | eassert (!other_buffer->base_buffer); | |
2082 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2083 | swapfield (newline_cache, struct region_cache *); | |
2084 | swapfield (width_run_cache, struct region_cache *); | |
2085 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2086 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2087 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2088 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2089 | swapfield (overlay_center, EMACS_INT); | |
5d8ea120 TT |
2090 | swapfield_ (undo_list, Lisp_Object); |
2091 | swapfield_ (mark, Lisp_Object); | |
2092 | swapfield_ (enable_multibyte_characters, Lisp_Object); | |
2093 | swapfield_ (bidi_display_reordering, Lisp_Object); | |
2094 | swapfield_ (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2095 | /* FIXME: Not sure what we should do with these *_marker fields. |
2096 | Hopefully they're just nil anyway. */ | |
5d8ea120 TT |
2097 | swapfield_ (pt_marker, Lisp_Object); |
2098 | swapfield_ (begv_marker, Lisp_Object); | |
2099 | swapfield_ (zv_marker, Lisp_Object); | |
4b4deea2 TT |
2100 | BVAR (current_buffer, point_before_scroll) = Qnil; |
2101 | BVAR (other_buffer, point_before_scroll) = Qnil; | |
13cda5f9 SM |
2102 | |
2103 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2104 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2105 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2106 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2107 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2108 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2109 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2110 | { |
2111 | struct Lisp_Marker *m; | |
2112 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2113 | if (m->buffer == other_buffer) | |
2114 | m->buffer = current_buffer; | |
b8ff72fa SM |
2115 | else |
2116 | /* Since there's no indirect buffer in sight, markers on | |
2117 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2118 | eassert (!m->buffer); | |
13cda5f9 SM |
2119 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2120 | if (m->buffer == current_buffer) | |
2121 | m->buffer = other_buffer; | |
b8ff72fa SM |
2122 | else |
2123 | /* Since there's no indirect buffer in sight, markers on | |
2124 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2125 | eassert (!m->buffer); | |
13cda5f9 | 2126 | } |
126f1fc1 SM |
2127 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2128 | So since we just swapped the markers between the two buffers, we need | |
2129 | to undo the effect of this swap for window markers. */ | |
2130 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2131 | Lisp_Object buf1, buf2; | |
2132 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2133 | ||
2134 | while (NILP (Fmemq (w, ws))) | |
2135 | { | |
2136 | ws = Fcons (w, ws); | |
2137 | if (MARKERP (XWINDOW (w)->pointm) | |
2138 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2139 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2140 | Fset_marker (XWINDOW (w)->pointm, | |
2141 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2142 | XWINDOW (w)->buffer); | |
2143 | w = Fnext_window (w, Qt, Qt); | |
2144 | } | |
2145 | } | |
2146 | ||
13cda5f9 SM |
2147 | if (current_buffer->text->intervals) |
2148 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2149 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2150 | if (other_buffer->text->intervals) | |
2151 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2152 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2153 | ||
2154 | return Qnil; | |
2155 | } | |
2156 | ||
a7ca3326 | 2157 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
3ac81adb | 2158 | 1, 1, 0, |
7ee72033 | 2159 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2160 | If FLAG is t, this makes the buffer a multibyte buffer. |
2161 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2162 | In these cases, the buffer contents remain unchanged as a sequence of |
2163 | bytes but the contents viewed as characters do change. | |
2164 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2165 | all eight-bit bytes to eight-bit characters. |
2166 | If the multibyte flag was really changed, undo information of the | |
2167 | current buffer is cleared. */) | |
5842a27b | 2168 | (Lisp_Object flag) |
3ac81adb | 2169 | { |
65745fad | 2170 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2171 | struct buffer *other; |
145582a0 | 2172 | EMACS_INT begv, zv; |
8d1203ea | 2173 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2174 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
4b4deea2 | 2175 | Lisp_Object old_undo = BVAR (current_buffer, undo_list); |
38babc07 | 2176 | struct gcpro gcpro1; |
3ac81adb | 2177 | |
6e553d5e RS |
2178 | if (current_buffer->base_buffer) |
2179 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2180 | ||
70e77119 | 2181 | /* Do nothing if nothing actually changes. */ |
4b4deea2 | 2182 | if (NILP (flag) == NILP (BVAR (current_buffer, enable_multibyte_characters))) |
70e77119 AS |
2183 | return flag; |
2184 | ||
38babc07 KS |
2185 | GCPRO1 (old_undo); |
2186 | ||
2187 | /* Don't record these buffer changes. We will put a special undo entry | |
2188 | instead. */ | |
4b4deea2 | 2189 | BVAR (current_buffer, undo_list) = Qt; |
b05525fa | 2190 | |
3ac81adb RS |
2191 | /* If the cached position is for this buffer, clear it out. */ |
2192 | clear_charpos_cache (current_buffer); | |
2193 | ||
458c8af4 KH |
2194 | if (NILP (flag)) |
2195 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2196 | else | |
2197 | begv = BEGV, zv = ZV; | |
2198 | ||
a9bcded1 KH |
2199 | if (narrowed) |
2200 | Fwiden (); | |
2201 | ||
3ac81adb RS |
2202 | if (NILP (flag)) |
2203 | { | |
145582a0 | 2204 | EMACS_INT pos, stop; |
a9bcded1 KH |
2205 | unsigned char *p; |
2206 | ||
3ac81adb RS |
2207 | /* Do this first, so it can use CHAR_TO_BYTE |
2208 | to calculate the old correspondences. */ | |
2209 | set_intervals_multibyte (0); | |
2210 | ||
4b4deea2 | 2211 | BVAR (current_buffer, enable_multibyte_characters) = Qnil; |
3ac81adb RS |
2212 | |
2213 | Z = Z_BYTE; | |
2214 | BEGV = BEGV_BYTE; | |
2215 | ZV = ZV_BYTE; | |
2216 | GPT = GPT_BYTE; | |
2217 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2218 | ||
60ebfdf3 | 2219 | |
65745fad SM |
2220 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2221 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2222 | |
2223 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2224 | pos = BEG; | |
2225 | stop = GPT; | |
2226 | p = BEG_ADDR; | |
2227 | while (1) | |
2228 | { | |
2229 | int c, bytes; | |
2230 | ||
2231 | if (pos == stop) | |
2232 | { | |
2233 | if (pos == Z) | |
2234 | break; | |
2235 | p = GAP_END_ADDR; | |
2236 | stop = Z; | |
2237 | } | |
8f348ed5 KH |
2238 | if (ASCII_BYTE_P (*p)) |
2239 | p++, pos++; | |
2240 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2241 | { |
62a6e103 | 2242 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 | 2243 | /* Delete all bytes for this 8-bit character but the |
3b59c351 | 2244 | last one, and change the last one to the character |
a9bcded1 KH |
2245 | code. */ |
2246 | bytes--; | |
2247 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2248 | p = GAP_END_ADDR; | |
2249 | *p++ = c; | |
2250 | pos++; | |
2251 | if (begv > pos) | |
2252 | begv -= bytes; | |
2253 | if (zv > pos) | |
2254 | zv -= bytes; | |
2255 | stop = Z; | |
2256 | } | |
8f924df7 | 2257 | else |
8f348ed5 KH |
2258 | { |
2259 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2260 | p += bytes, pos += bytes; | |
2261 | } | |
a9bcded1 KH |
2262 | } |
2263 | if (narrowed) | |
2264 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2265 | } |
2266 | else | |
2267 | { | |
145582a0 EZ |
2268 | EMACS_INT pt = PT; |
2269 | EMACS_INT pos, stop; | |
8f348ed5 | 2270 | unsigned char *p, *pend; |
a9bcded1 | 2271 | |
673c57d2 | 2272 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2273 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2274 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2275 | |
8f924df7 | 2276 | if (EQ (flag, Qt) |
a3a303df | 2277 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2278 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2279 | { | |
8f54f30a | 2280 | unsigned char *q = GPT_ADDR - 1; |
673c57d2 | 2281 | |
8f54f30a PE |
2282 | while (! CHAR_HEAD_P (*q) && q > BEG_ADDR) q--; |
2283 | if (LEADING_CODE_P (*q)) | |
673c57d2 | 2284 | { |
8f54f30a | 2285 | EMACS_INT new_gpt = GPT_BYTE - (GPT_ADDR - q); |
673c57d2 KH |
2286 | |
2287 | move_gap_both (new_gpt, new_gpt); | |
2288 | } | |
2289 | } | |
2290 | ||
a9bcded1 KH |
2291 | /* Make the buffer contents valid as multibyte by converting |
2292 | 8-bit characters to multibyte form. */ | |
2293 | pos = BEG; | |
2294 | stop = GPT; | |
2295 | p = BEG_ADDR; | |
8f348ed5 | 2296 | pend = GPT_ADDR; |
a9bcded1 KH |
2297 | while (1) |
2298 | { | |
2299 | int bytes; | |
2300 | ||
2301 | if (pos == stop) | |
2302 | { | |
2303 | if (pos == Z) | |
2304 | break; | |
2305 | p = GAP_END_ADDR; | |
8f348ed5 | 2306 | pend = Z_ADDR; |
a9bcded1 KH |
2307 | stop = Z; |
2308 | } | |
177c0ea7 | 2309 | |
a3a303df KH |
2310 | if (ASCII_BYTE_P (*p)) |
2311 | p++, pos++; | |
dcfb9bc4 KH |
2312 | else if (EQ (flag, Qt) |
2313 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2314 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2315 | p += bytes, pos += bytes; |
2316 | else | |
2317 | { | |
2318 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2319 | int c; |
a9bcded1 | 2320 | |
8f924df7 | 2321 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2322 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2323 | *p = tmp[0]; |
2324 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2325 | bytes--; | |
b68864e5 | 2326 | insert_1_both ((char *) tmp + 1, bytes, bytes, 1, 0, 0); |
a9bcded1 KH |
2327 | /* Now the gap is after the just inserted data. */ |
2328 | pos = GPT; | |
2329 | p = GAP_END_ADDR; | |
2330 | if (pos <= begv) | |
2331 | begv += bytes; | |
2332 | if (pos <= zv) | |
2333 | zv += bytes; | |
2334 | if (pos <= pt) | |
2335 | pt += bytes; | |
31285a8f | 2336 | pend = Z_ADDR; |
a9bcded1 KH |
2337 | stop = Z; |
2338 | } | |
2339 | } | |
2340 | ||
2341 | if (pt != PT) | |
2342 | TEMP_SET_PT (pt); | |
2343 | ||
2344 | if (narrowed) | |
2345 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2346 | ||
3ac81adb RS |
2347 | /* Do this first, so that chars_in_text asks the right question. |
2348 | set_intervals_multibyte needs it too. */ | |
4b4deea2 | 2349 | BVAR (current_buffer, enable_multibyte_characters) = Qt; |
3ac81adb | 2350 | |
b05525fa | 2351 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2352 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2353 | |
673c57d2 | 2354 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2355 | |
2356 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2357 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2358 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2359 | else |
2360 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2361 | |
2362 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2363 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2364 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2365 | else |
2366 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2367 | |
2368 | { | |
8f54f30a PE |
2369 | EMACS_INT byte = advance_to_char_boundary (PT_BYTE); |
2370 | EMACS_INT position; | |
b05525fa | 2371 | |
8f54f30a PE |
2372 | if (byte > GPT_BYTE) |
2373 | position = chars_in_text (GAP_END_ADDR, byte - GPT_BYTE) + GPT; | |
b05525fa | 2374 | else |
8f54f30a PE |
2375 | position = chars_in_text (BEG_ADDR, byte - BEG_BYTE) + BEG; |
2376 | TEMP_SET_PT_BOTH (position, byte); | |
b05525fa | 2377 | } |
3ac81adb RS |
2378 | |
2379 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2380 | |
2381 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2382 | getting confused by the markers that have not yet been updated. | |
2383 | It is also a signal that it should never create a marker. */ | |
65745fad | 2384 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2385 | |
65745fad | 2386 | for (; tail; tail = tail->next) |
3ac81adb | 2387 | { |
65745fad SM |
2388 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2389 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2390 | } |
b69f9797 RS |
2391 | |
2392 | /* Make sure no markers were put on the chain | |
2393 | while the chain value was incorrect. */ | |
65745fad | 2394 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2395 | abort (); |
2396 | ||
3ac81adb RS |
2397 | BUF_MARKERS (current_buffer) = markers; |
2398 | ||
2399 | /* Do this last, so it can calculate the new correspondences | |
2400 | between chars and bytes. */ | |
2401 | set_intervals_multibyte (1); | |
2402 | } | |
2403 | ||
38babc07 KS |
2404 | if (!EQ (old_undo, Qt)) |
2405 | { | |
2406 | /* Represent all the above changes by a special undo entry. */ | |
4b4deea2 | 2407 | BVAR (current_buffer, undo_list) = Fcons (list3 (Qapply, |
8929fd87 KS |
2408 | intern ("set-buffer-multibyte"), |
2409 | NILP (flag) ? Qt : Qnil), | |
2410 | old_undo); | |
38babc07 KS |
2411 | } |
2412 | ||
2413 | UNGCPRO; | |
a9bcded1 | 2414 | |
724b203f GM |
2415 | /* Changing the multibyteness of a buffer means that all windows |
2416 | showing that buffer must be updated thoroughly. */ | |
2417 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2418 | ++windows_or_buffers_changed; | |
2419 | ||
abc9d959 RS |
2420 | /* Copy this buffer's new multibyte status |
2421 | into all of its indirect buffers. */ | |
eab3844f | 2422 | for (other = all_buffers; other; other = other->header.next.buffer) |
4b4deea2 | 2423 | if (other->base_buffer == current_buffer && !NILP (BVAR (other, name))) |
724b203f | 2424 | { |
4b4deea2 TT |
2425 | BVAR (other, enable_multibyte_characters) |
2426 | = BVAR (current_buffer, enable_multibyte_characters); | |
724b203f GM |
2427 | other->prevent_redisplay_optimizations_p = 1; |
2428 | } | |
abc9d959 | 2429 | |
ed00559d KH |
2430 | /* Restore the modifiedness of the buffer. */ |
2431 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2432 | Fset_buffer_modified_p (Qnil); | |
2433 | ||
172f9454 KH |
2434 | /* Update coding systems of this buffer's process (if any). */ |
2435 | { | |
2436 | Lisp_Object process; | |
2437 | ||
2438 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2439 | if (PROCESSP (process)) | |
2440 | setup_process_coding_systems (process); | |
2441 | } | |
2442 | ||
3ac81adb RS |
2443 | return flag; |
2444 | } | |
2445 | \f | |
a7ca3326 | 2446 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, |
16a97296 | 2447 | Skill_all_local_variables, 0, 0, 0, |
7ee72033 | 2448 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2449 | Most local variable bindings are eliminated so that the default values |
2450 | become effective once more. Also, the syntax table is set from | |
2451 | `standard-syntax-table', the local keymap is set to nil, | |
2452 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2453 | This function also forces redisplay of the mode line. | |
2454 | ||
2455 | Every function to select a new major mode starts by | |
2456 | calling this function. | |
2457 | ||
2458 | As a special exception, local variables whose names have | |
2459 | a non-nil `permanent-local' property are not eliminated by this function. | |
2460 | ||
2461 | The first thing this function does is run | |
7ee72033 | 2462 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2463 | (void) |
1ab256cb | 2464 | { |
dee091a3 | 2465 | Frun_hooks (1, &Qchange_major_mode_hook); |
1ab256cb | 2466 | |
3709505e | 2467 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2468 | remain swapped in, in their symbols. */ |
1ab256cb | 2469 | |
2f3f993b | 2470 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2471 | |
2472 | /* Actually eliminate all local bindings of this buffer. */ | |
2473 | ||
13de9290 | 2474 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2475 | |
1ab256cb RM |
2476 | /* Force mode-line redisplay. Useful here because all major mode |
2477 | commands call this function. */ | |
2478 | update_mode_lines++; | |
2479 | ||
2480 | return Qnil; | |
2481 | } | |
2f3f993b RS |
2482 | |
2483 | /* Make sure no local variables remain set up with buffer B | |
2484 | for their current values. */ | |
2485 | ||
2486 | static void | |
d3da34e0 | 2487 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2488 | { |
ce5b453a | 2489 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2490 | |
2491 | XSETBUFFER (buffer, b); | |
4b4deea2 | 2492 | oalist = BVAR (b, local_var_alist); |
2f3f993b | 2493 | |
67ee9f6e | 2494 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2495 | { |
ce5b453a SM |
2496 | Lisp_Object sym = XCAR (XCAR (alist)); |
2497 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2498 | /* Need not do anything if some other buffer's binding is | |
e4769531 | 2499 | now cached. */ |
ce5b453a | 2500 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) |
2f3f993b | 2501 | { |
e7c10f83 SM |
2502 | /* Symbol is set up for this buffer's old local value: |
2503 | swap it out! */ | |
ce5b453a | 2504 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2505 | } |
2506 | } | |
2507 | } | |
1ab256cb | 2508 | \f |
2eec3b4e | 2509 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2510 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2511 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2512 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2513 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2514 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2515 | or where an overlay starts which ends at or after POS; |
624d2678 | 2516 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2517 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2518 | |
2519 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2520 | when this function is called. |
2521 | ||
2522 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2523 | If EXTEND is zero, we never extend the vector, | |
2524 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2525 | But we still return the total number of overlays. |
2526 | ||
2527 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2528 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2529 | default (BEGV or ZV). */ | |
2eec3b4e | 2530 | |
b081724f PE |
2531 | ptrdiff_t |
2532 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, | |
2533 | ptrdiff_t *len_ptr, | |
d3da34e0 | 2534 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) |
1ab256cb | 2535 | { |
2410d73a SM |
2536 | Lisp_Object overlay, start, end; |
2537 | struct Lisp_Overlay *tail; | |
b081724f PE |
2538 | ptrdiff_t idx = 0; |
2539 | ptrdiff_t len = *len_ptr; | |
2eec3b4e | 2540 | Lisp_Object *vec = *vec_ptr; |
145582a0 EZ |
2541 | EMACS_INT next = ZV; |
2542 | EMACS_INT prev = BEGV; | |
61d54cd5 RS |
2543 | int inhibit_storing = 0; |
2544 | ||
2410d73a | 2545 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2546 | { |
145582a0 | 2547 | EMACS_INT startpos, endpos; |
52f8ec73 | 2548 | |
2410d73a | 2549 | XSETMISC (overlay, tail); |
1ab256cb | 2550 | |
2eec3b4e RS |
2551 | start = OVERLAY_START (overlay); |
2552 | end = OVERLAY_END (overlay); | |
239c932b RS |
2553 | endpos = OVERLAY_POSITION (end); |
2554 | if (endpos < pos) | |
2555 | { | |
2556 | if (prev < endpos) | |
2557 | prev = endpos; | |
2558 | break; | |
2559 | } | |
413e06a4 RS |
2560 | startpos = OVERLAY_POSITION (start); |
2561 | /* This one ends at or after POS | |
daa1c109 | 2562 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2563 | if (prev < startpos && startpos < pos) |
2564 | prev = startpos; | |
239c932b RS |
2565 | if (endpos == pos) |
2566 | continue; | |
2eec3b4e RS |
2567 | if (startpos <= pos) |
2568 | { | |
2569 | if (idx == len) | |
2570 | { | |
61d54cd5 RS |
2571 | /* The supplied vector is full. |
2572 | Either make it bigger, or don't store any more in it. */ | |
2573 | if (extend) | |
2574 | { | |
0065d054 PE |
2575 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2576 | sizeof *vec); | |
61d54cd5 | 2577 | *vec_ptr = vec; |
0065d054 | 2578 | len = *len_ptr; |
61d54cd5 RS |
2579 | } |
2580 | else | |
2581 | inhibit_storing = 1; | |
2eec3b4e | 2582 | } |
61d54cd5 RS |
2583 | |
2584 | if (!inhibit_storing) | |
2585 | vec[idx] = overlay; | |
2586 | /* Keep counting overlays even if we can't return them all. */ | |
2587 | idx++; | |
2eec3b4e RS |
2588 | } |
2589 | else if (startpos < next) | |
2590 | next = startpos; | |
2591 | } | |
2592 | ||
2410d73a | 2593 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2594 | { |
145582a0 | 2595 | EMACS_INT startpos, endpos; |
52f8ec73 | 2596 | |
2410d73a | 2597 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2598 | |
2599 | start = OVERLAY_START (overlay); | |
2600 | end = OVERLAY_END (overlay); | |
2601 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2602 | if (pos < startpos) |
2eec3b4e RS |
2603 | { |
2604 | if (startpos < next) | |
2605 | next = startpos; | |
2606 | break; | |
2607 | } | |
239c932b RS |
2608 | endpos = OVERLAY_POSITION (end); |
2609 | if (pos < endpos) | |
2eec3b4e RS |
2610 | { |
2611 | if (idx == len) | |
2612 | { | |
61d54cd5 RS |
2613 | if (extend) |
2614 | { | |
0065d054 PE |
2615 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2616 | sizeof *vec); | |
61d54cd5 | 2617 | *vec_ptr = vec; |
0065d054 | 2618 | len = *len_ptr; |
61d54cd5 RS |
2619 | } |
2620 | else | |
2621 | inhibit_storing = 1; | |
2eec3b4e | 2622 | } |
61d54cd5 RS |
2623 | |
2624 | if (!inhibit_storing) | |
2625 | vec[idx] = overlay; | |
2626 | idx++; | |
413e06a4 RS |
2627 | |
2628 | if (startpos < pos && startpos > prev) | |
2629 | prev = startpos; | |
2eec3b4e | 2630 | } |
239c932b RS |
2631 | else if (endpos < pos && endpos > prev) |
2632 | prev = endpos; | |
1d5f4c1d MB |
2633 | else if (endpos == pos && startpos > prev |
2634 | && (!change_req || startpos < pos)) | |
413e06a4 | 2635 | prev = startpos; |
1ab256cb RM |
2636 | } |
2637 | ||
239c932b RS |
2638 | if (next_ptr) |
2639 | *next_ptr = next; | |
2640 | if (prev_ptr) | |
2641 | *prev_ptr = prev; | |
2eec3b4e RS |
2642 | return idx; |
2643 | } | |
74514898 | 2644 | \f |
7723e095 MR |
2645 | /* Find all the overlays in the current buffer that overlap the range |
2646 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2647 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2648 | |
177c0ea7 | 2649 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2650 | Store in *LEN_PTR the size allocated for the vector. |
2651 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2652 | or ZV if there are no more overlays. | |
2653 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2654 | or BEGV if there are no previous overlays. | |
2655 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2656 | ||
2657 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2658 | when this function is called. | |
2659 | ||
2660 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2661 | If EXTEND is zero, we never extend the vector, | |
2662 | and we store only as many overlays as will fit. | |
2663 | But we still return the total number of overlays. */ | |
2664 | ||
21514da7 | 2665 | static ptrdiff_t |
145582a0 | 2666 | overlays_in (EMACS_INT beg, EMACS_INT end, int extend, |
21514da7 | 2667 | Lisp_Object **vec_ptr, ptrdiff_t *len_ptr, |
145582a0 | 2668 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr) |
74514898 | 2669 | { |
2410d73a SM |
2670 | Lisp_Object overlay, ostart, oend; |
2671 | struct Lisp_Overlay *tail; | |
21514da7 PE |
2672 | ptrdiff_t idx = 0; |
2673 | ptrdiff_t len = *len_ptr; | |
74514898 | 2674 | Lisp_Object *vec = *vec_ptr; |
145582a0 EZ |
2675 | EMACS_INT next = ZV; |
2676 | EMACS_INT prev = BEGV; | |
74514898 | 2677 | int inhibit_storing = 0; |
7723e095 | 2678 | int end_is_Z = end == Z; |
74514898 | 2679 | |
2410d73a | 2680 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 | 2681 | { |
145582a0 | 2682 | EMACS_INT startpos, endpos; |
74514898 | 2683 | |
2410d73a | 2684 | XSETMISC (overlay, tail); |
74514898 RS |
2685 | |
2686 | ostart = OVERLAY_START (overlay); | |
2687 | oend = OVERLAY_END (overlay); | |
2688 | endpos = OVERLAY_POSITION (oend); | |
2689 | if (endpos < beg) | |
2690 | { | |
2691 | if (prev < endpos) | |
2692 | prev = endpos; | |
2693 | break; | |
2694 | } | |
2695 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2696 | /* Count an interval if it overlaps the range, is empty at the |
2697 | start of the range, or is empty at END provided END denotes the | |
2698 | end of the buffer. */ | |
74514898 | 2699 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2700 | || (startpos == endpos |
2701 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2702 | { |
2703 | if (idx == len) | |
2704 | { | |
2705 | /* The supplied vector is full. | |
2706 | Either make it bigger, or don't store any more in it. */ | |
2707 | if (extend) | |
2708 | { | |
0065d054 PE |
2709 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2710 | sizeof *vec); | |
74514898 | 2711 | *vec_ptr = vec; |
0065d054 | 2712 | len = *len_ptr; |
74514898 RS |
2713 | } |
2714 | else | |
2715 | inhibit_storing = 1; | |
2716 | } | |
2717 | ||
2718 | if (!inhibit_storing) | |
2719 | vec[idx] = overlay; | |
2720 | /* Keep counting overlays even if we can't return them all. */ | |
2721 | idx++; | |
2722 | } | |
2723 | else if (startpos < next) | |
2724 | next = startpos; | |
2725 | } | |
2726 | ||
2410d73a | 2727 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 | 2728 | { |
145582a0 | 2729 | EMACS_INT startpos, endpos; |
74514898 | 2730 | |
2410d73a | 2731 | XSETMISC (overlay, tail); |
74514898 RS |
2732 | |
2733 | ostart = OVERLAY_START (overlay); | |
2734 | oend = OVERLAY_END (overlay); | |
2735 | startpos = OVERLAY_POSITION (ostart); | |
2736 | if (end < startpos) | |
2737 | { | |
2738 | if (startpos < next) | |
2739 | next = startpos; | |
2740 | break; | |
2741 | } | |
2742 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2743 | /* Count an interval if it overlaps the range, is empty at the |
2744 | start of the range, or is empty at END provided END denotes the | |
2745 | end of the buffer. */ | |
74514898 | 2746 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2747 | || (startpos == endpos |
2748 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2749 | { |
2750 | if (idx == len) | |
2751 | { | |
2752 | if (extend) | |
2753 | { | |
0065d054 PE |
2754 | vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX, |
2755 | sizeof *vec); | |
74514898 | 2756 | *vec_ptr = vec; |
0065d054 | 2757 | len = *len_ptr; |
74514898 RS |
2758 | } |
2759 | else | |
2760 | inhibit_storing = 1; | |
2761 | } | |
2762 | ||
2763 | if (!inhibit_storing) | |
2764 | vec[idx] = overlay; | |
2765 | idx++; | |
2766 | } | |
2767 | else if (endpos < beg && endpos > prev) | |
2768 | prev = endpos; | |
2769 | } | |
fc04fa47 | 2770 | |
74514898 RS |
2771 | if (next_ptr) |
2772 | *next_ptr = next; | |
2773 | if (prev_ptr) | |
2774 | *prev_ptr = prev; | |
2775 | return idx; | |
2776 | } | |
09a22085 GM |
2777 | |
2778 | ||
2779 | /* Return non-zero if there exists an overlay with a non-nil | |
2780 | `mouse-face' property overlapping OVERLAY. */ | |
2781 | ||
2782 | int | |
d3da34e0 | 2783 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 | 2784 | { |
145582a0 EZ |
2785 | EMACS_INT start = OVERLAY_POSITION (OVERLAY_START (overlay)); |
2786 | EMACS_INT end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
21514da7 | 2787 | ptrdiff_t n, i, size; |
09a22085 | 2788 | Lisp_Object *v, tem; |
177c0ea7 | 2789 | |
bfd8410f GM |
2790 | size = 10; |
2791 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2792 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2793 | if (n > size) | |
09a22085 | 2794 | { |
09a22085 GM |
2795 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2796 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2797 | } | |
2798 | ||
2799 | for (i = 0; i < n; ++i) | |
2800 | if (!EQ (v[i], overlay) | |
2801 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2802 | !NILP (tem))) | |
2803 | break; | |
2804 | ||
2805 | return i < n; | |
2806 | } | |
2807 | ||
2808 | ||
74514898 | 2809 | \f |
fc04fa47 KH |
2810 | /* Fast function to just test if we're at an overlay boundary. */ |
2811 | int | |
145582a0 | 2812 | overlay_touches_p (EMACS_INT pos) |
fc04fa47 | 2813 | { |
2410d73a SM |
2814 | Lisp_Object overlay; |
2815 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2816 | |
2410d73a | 2817 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 | 2818 | { |
145582a0 | 2819 | EMACS_INT endpos; |
fc04fa47 | 2820 | |
2410d73a | 2821 | XSETMISC (overlay ,tail); |
8e50cc2d | 2822 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2823 | abort (); |
2824 | ||
2825 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2826 | if (endpos < pos) | |
2827 | break; | |
2828 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2829 | return 1; | |
2830 | } | |
2831 | ||
2410d73a | 2832 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 | 2833 | { |
145582a0 | 2834 | EMACS_INT startpos; |
fc04fa47 | 2835 | |
2410d73a | 2836 | XSETMISC (overlay, tail); |
8e50cc2d | 2837 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2838 | abort (); |
2839 | ||
2840 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2841 | if (pos < startpos) | |
2842 | break; | |
2843 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2844 | return 1; | |
2845 | } | |
2846 | return 0; | |
2847 | } | |
2eec3b4e | 2848 | \f |
5985d248 KH |
2849 | struct sortvec |
2850 | { | |
2851 | Lisp_Object overlay; | |
145582a0 | 2852 | EMACS_INT beg, end; |
fadf4e30 | 2853 | EMACS_INT priority; |
5985d248 KH |
2854 | }; |
2855 | ||
2856 | static int | |
d3da34e0 | 2857 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2858 | { |
dfcf069d AS |
2859 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2860 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 | 2861 | if (s1->priority != s2->priority) |
c20998a7 | 2862 | return s1->priority < s2->priority ? -1 : 1; |
5985d248 | 2863 | if (s1->beg != s2->beg) |
c20998a7 | 2864 | return s1->beg < s2->beg ? -1 : 1; |
5985d248 | 2865 | if (s1->end != s2->end) |
c20998a7 | 2866 | return s2->end < s1->end ? -1 : 1; |
5985d248 KH |
2867 | return 0; |
2868 | } | |
2869 | ||
2870 | /* Sort an array of overlays by priority. The array is modified in place. | |
2871 | The return value is the new size; this may be smaller than the original | |
2872 | size if some of the overlays were invalid or were window-specific. */ | |
b081724f PE |
2873 | ptrdiff_t |
2874 | sort_overlays (Lisp_Object *overlay_vec, ptrdiff_t noverlays, struct window *w) | |
5985d248 | 2875 | { |
b081724f | 2876 | ptrdiff_t i, j; |
5985d248 KH |
2877 | struct sortvec *sortvec; |
2878 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2879 | ||
2880 | /* Put the valid and relevant overlays into sortvec. */ | |
2881 | ||
2882 | for (i = 0, j = 0; i < noverlays; i++) | |
2883 | { | |
0fa767e7 | 2884 | Lisp_Object tem; |
c99fc30f | 2885 | Lisp_Object overlay; |
5985d248 | 2886 | |
c99fc30f | 2887 | overlay = overlay_vec[i]; |
5985d248 KH |
2888 | if (OVERLAY_VALID (overlay) |
2889 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2890 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2891 | { | |
0fa767e7 KH |
2892 | /* If we're interested in a specific window, then ignore |
2893 | overlays that are limited to some other window. */ | |
2894 | if (w) | |
5985d248 | 2895 | { |
28545e04 | 2896 | Lisp_Object window; |
0fa767e7 KH |
2897 | |
2898 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 2899 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2900 | continue; |
5985d248 | 2901 | } |
0fa767e7 KH |
2902 | |
2903 | /* This overlay is good and counts: put it into sortvec. */ | |
2904 | sortvec[j].overlay = overlay; | |
2905 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2906 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2907 | tem = Foverlay_get (overlay, Qpriority); | |
2908 | if (INTEGERP (tem)) | |
2909 | sortvec[j].priority = XINT (tem); | |
2910 | else | |
2911 | sortvec[j].priority = 0; | |
2912 | j++; | |
5985d248 KH |
2913 | } |
2914 | } | |
2915 | noverlays = j; | |
2916 | ||
2917 | /* Sort the overlays into the proper order: increasing priority. */ | |
2918 | ||
2919 | if (noverlays > 1) | |
2920 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2921 | ||
2922 | for (i = 0; i < noverlays; i++) | |
2923 | overlay_vec[i] = sortvec[i].overlay; | |
2924 | return (noverlays); | |
2925 | } | |
2926 | \f | |
bbbe9545 KH |
2927 | struct sortstr |
2928 | { | |
cb26008f | 2929 | Lisp_Object string, string2; |
93cb6be3 | 2930 | ptrdiff_t size; |
8961a454 | 2931 | EMACS_INT priority; |
bbbe9545 KH |
2932 | }; |
2933 | ||
e8185fa8 KH |
2934 | struct sortstrlist |
2935 | { | |
2936 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
67c36fce PE |
2937 | ptrdiff_t size; /* Allocated length of that array. */ |
2938 | ptrdiff_t used; /* How much of the array is currently in use. */ | |
0065d054 | 2939 | ptrdiff_t bytes; /* Total length of the strings in buf. */ |
e8185fa8 KH |
2940 | }; |
2941 | ||
2942 | /* Buffers for storing information about the overlays touching a given | |
2943 | position. These could be automatic variables in overlay_strings, but | |
2944 | it's more efficient to hold onto the memory instead of repeatedly | |
2945 | allocating and freeing it. */ | |
2946 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2947 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2948 | |
2949 | /* Allocated length of overlay_str_buf. */ | |
fe5c5d37 | 2950 | static ptrdiff_t overlay_str_len; |
e8185fa8 | 2951 | |
bbbe9545 KH |
2952 | /* A comparison function suitable for passing to qsort. */ |
2953 | static int | |
d3da34e0 | 2954 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
2955 | { |
2956 | struct sortstr *s1 = (struct sortstr *)as1; | |
2957 | struct sortstr *s2 = (struct sortstr *)as2; | |
2958 | if (s1->size != s2->size) | |
c20998a7 | 2959 | return s2->size < s1->size ? -1 : 1; |
bbbe9545 | 2960 | if (s1->priority != s2->priority) |
c20998a7 | 2961 | return s1->priority < s2->priority ? -1 : 1; |
bbbe9545 KH |
2962 | return 0; |
2963 | } | |
2964 | ||
e8185fa8 | 2965 | static void |
93cb6be3 PE |
2966 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, |
2967 | Lisp_Object str2, Lisp_Object pri, ptrdiff_t size) | |
e8185fa8 | 2968 | { |
145582a0 | 2969 | EMACS_INT nbytes; |
43d27a72 | 2970 | |
e8185fa8 | 2971 | if (ssl->used == ssl->size) |
0065d054 | 2972 | ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf); |
e8185fa8 | 2973 | ssl->buf[ssl->used].string = str; |
cb26008f | 2974 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2975 | ssl->buf[ssl->used].size = size; |
2976 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2977 | ssl->used++; | |
43d27a72 | 2978 | |
4b4deea2 | 2979 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2980 | nbytes = SCHARS (str); |
43d27a72 | 2981 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2982 | nbytes = count_size_as_multibyte (SDATA (str), |
2983 | SBYTES (str)); | |
43d27a72 | 2984 | else |
d5db4077 | 2985 | nbytes = SBYTES (str); |
43d27a72 | 2986 | |
0065d054 PE |
2987 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
2988 | memory_full (SIZE_MAX); | |
43d27a72 RS |
2989 | ssl->bytes += nbytes; |
2990 | ||
cb26008f | 2991 | if (STRINGP (str2)) |
43d27a72 | 2992 | { |
4b4deea2 | 2993 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
d5db4077 | 2994 | nbytes = SCHARS (str2); |
43d27a72 | 2995 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2996 | nbytes = count_size_as_multibyte (SDATA (str2), |
2997 | SBYTES (str2)); | |
43d27a72 | 2998 | else |
d5db4077 | 2999 | nbytes = SBYTES (str2); |
43d27a72 | 3000 | |
0065d054 PE |
3001 | if (INT_ADD_OVERFLOW (ssl->bytes, nbytes)) |
3002 | memory_full (SIZE_MAX); | |
43d27a72 RS |
3003 | ssl->bytes += nbytes; |
3004 | } | |
e8185fa8 | 3005 | } |
bbbe9545 KH |
3006 | |
3007 | /* Return the concatenation of the strings associated with overlays that | |
3008 | begin or end at POS, ignoring overlays that are specific to a window | |
3009 | other than W. The strings are concatenated in the appropriate order: | |
3010 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3011 | lower. Normally all of the after-strings come first, but zero-sized |
3012 | overlays have their after-strings ride along with the before-strings | |
3013 | because it would look strange to print them inside-out. | |
3014 | ||
3015 | Returns the string length, and stores the contents indirectly through | |
3016 | PSTR, if that variable is non-null. The string may be overwritten by | |
3017 | subsequent calls. */ | |
6b5d3b89 | 3018 | |
5816888b | 3019 | EMACS_INT |
d3da34e0 | 3020 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3021 | { |
28545e04 | 3022 | Lisp_Object overlay, window, str; |
2410d73a | 3023 | struct Lisp_Overlay *ov; |
145582a0 | 3024 | EMACS_INT startpos, endpos; |
4b4deea2 | 3025 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
bbbe9545 | 3026 | |
e8185fa8 KH |
3027 | overlay_heads.used = overlay_heads.bytes = 0; |
3028 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3029 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3030 | { |
2410d73a | 3031 | XSETMISC (overlay, ov); |
c2d5b10f | 3032 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3033 | |
3034 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3035 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3036 | if (endpos < pos) | |
3037 | break; | |
3038 | if (endpos != pos && startpos != pos) | |
3039 | continue; | |
3040 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3041 | if (WINDOWP (window) && XWINDOW (window) != w) |
bbbe9545 | 3042 | continue; |
e8185fa8 KH |
3043 | if (startpos == pos |
3044 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3045 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3046 | (startpos == endpos |
3047 | ? Foverlay_get (overlay, Qafter_string) | |
3048 | : Qnil), | |
3049 | Foverlay_get (overlay, Qpriority), | |
3050 | endpos - startpos); | |
3051 | else if (endpos == pos | |
3052 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3053 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3054 | Foverlay_get (overlay, Qpriority), |
3055 | endpos - startpos); | |
bbbe9545 | 3056 | } |
2410d73a | 3057 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3058 | { |
2410d73a SM |
3059 | XSETMISC (overlay, ov); |
3060 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3061 | |
3062 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3063 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3064 | if (startpos > pos) | |
3065 | break; | |
e8185fa8 KH |
3066 | if (endpos != pos && startpos != pos) |
3067 | continue; | |
3068 | window = Foverlay_get (overlay, Qwindow); | |
28545e04 | 3069 | if (WINDOWP (window) && XWINDOW (window) != w) |
e8185fa8 | 3070 | continue; |
e8185fa8 KH |
3071 | if (startpos == pos |
3072 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3073 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3074 | (startpos == endpos |
3075 | ? Foverlay_get (overlay, Qafter_string) | |
3076 | : Qnil), | |
3077 | Foverlay_get (overlay, Qpriority), | |
3078 | endpos - startpos); | |
3079 | else if (endpos == pos | |
3080 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3081 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3082 | Foverlay_get (overlay, Qpriority), |
3083 | endpos - startpos); | |
bbbe9545 | 3084 | } |
e8185fa8 KH |
3085 | if (overlay_tails.used > 1) |
3086 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3087 | cmp_for_strings); | |
3088 | if (overlay_heads.used > 1) | |
3089 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3090 | cmp_for_strings); | |
3091 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3092 | { |
e8185fa8 | 3093 | Lisp_Object tem; |
145582a0 | 3094 | EMACS_INT i; |
9f4d7cde | 3095 | unsigned char *p; |
0065d054 | 3096 | ptrdiff_t total; |
bbbe9545 | 3097 | |
0065d054 PE |
3098 | if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes)) |
3099 | memory_full (SIZE_MAX); | |
3100 | total = overlay_heads.bytes + overlay_tails.bytes; | |
bbbe9545 | 3101 | if (total > overlay_str_len) |
0065d054 PE |
3102 | overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len, |
3103 | total - overlay_str_len, -1, 1); | |
3104 | ||
bbbe9545 | 3105 | p = overlay_str_buf; |
e8185fa8 | 3106 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3107 | { |
145582a0 | 3108 | EMACS_INT nbytes; |
e8185fa8 | 3109 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3110 | nbytes = copy_text (SDATA (tem), p, |
3111 | SBYTES (tem), | |
43d27a72 RS |
3112 | STRING_MULTIBYTE (tem), multibyte); |
3113 | p += nbytes; | |
bbbe9545 | 3114 | } |
e8185fa8 | 3115 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3116 | { |
145582a0 | 3117 | EMACS_INT nbytes; |
e8185fa8 | 3118 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3119 | nbytes = copy_text (SDATA (tem), p, |
3120 | SBYTES (tem), | |
43d27a72 RS |
3121 | STRING_MULTIBYTE (tem), multibyte); |
3122 | p += nbytes; | |
cb26008f KH |
3123 | tem = overlay_heads.buf[i].string2; |
3124 | if (STRINGP (tem)) | |
3125 | { | |
d5db4077 KR |
3126 | nbytes = copy_text (SDATA (tem), p, |
3127 | SBYTES (tem), | |
43d27a72 RS |
3128 | STRING_MULTIBYTE (tem), multibyte); |
3129 | p += nbytes; | |
cb26008f | 3130 | } |
bbbe9545 | 3131 | } |
cb26008f KH |
3132 | if (p != overlay_str_buf + total) |
3133 | abort (); | |
bbbe9545 KH |
3134 | if (pstr) |
3135 | *pstr = overlay_str_buf; | |
e8185fa8 | 3136 | return total; |
bbbe9545 | 3137 | } |
e8185fa8 | 3138 | return 0; |
bbbe9545 KH |
3139 | } |
3140 | \f | |
5c4f68f1 | 3141 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3142 | |
2eec3b4e | 3143 | void |
d3da34e0 | 3144 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3145 | { |
2410d73a SM |
3146 | Lisp_Object overlay, beg, end; |
3147 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3148 | |
3149 | /* See if anything in overlays_before should move to overlays_after. */ | |
3150 | ||
3151 | /* We don't strictly need prev in this loop; it should always be nil. | |
3152 | But we use it for symmetry and in case that should cease to be true | |
3153 | with some future change. */ | |
2410d73a SM |
3154 | prev = NULL; |
3155 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3156 | { |
2410d73a SM |
3157 | next = tail->next; |
3158 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3159 | |
3160 | /* If the overlay is not valid, get rid of it. */ | |
3161 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3162 | #if 1 |
3163 | abort (); | |
3164 | #else | |
2eec3b4e RS |
3165 | { |
3166 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3167 | if (!NILP (prev)) | |
7539e11f | 3168 | XCDR (prev) = next; |
2eec3b4e | 3169 | else |
5c4f68f1 | 3170 | buf->overlays_before = next; |
2eec3b4e RS |
3171 | tail = prev; |
3172 | continue; | |
3173 | } | |
52f8ec73 | 3174 | #endif |
1ab256cb | 3175 | |
2eec3b4e RS |
3176 | beg = OVERLAY_START (overlay); |
3177 | end = OVERLAY_END (overlay); | |
1ab256cb | 3178 | |
2eec3b4e | 3179 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3180 | { |
2eec3b4e | 3181 | /* OVERLAY needs to be moved. */ |
145582a0 | 3182 | EMACS_INT where = OVERLAY_POSITION (beg); |
2410d73a | 3183 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3184 | |
3185 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3186 | if (prev) |
3187 | prev->next = next; | |
2eec3b4e | 3188 | else |
5c4f68f1 | 3189 | buf->overlays_before = next; |
2eec3b4e RS |
3190 | |
3191 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3192 | other_prev = NULL; |
3193 | for (other = buf->overlays_after; other; | |
3194 | other_prev = other, other = other->next) | |
1ab256cb | 3195 | { |
6af718a4 | 3196 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3197 | |
2410d73a SM |
3198 | XSETMISC (otheroverlay, other); |
3199 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3200 | |
3201 | otherbeg = OVERLAY_START (otheroverlay); | |
3202 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3203 | break; | |
1ab256cb | 3204 | } |
2eec3b4e RS |
3205 | |
3206 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3207 | tail->next = other; |
3208 | if (other_prev) | |
3209 | other_prev->next = tail; | |
1ab256cb | 3210 | else |
5c4f68f1 | 3211 | buf->overlays_after = tail; |
2eec3b4e | 3212 | tail = prev; |
1ab256cb | 3213 | } |
2eec3b4e RS |
3214 | else |
3215 | /* We've reached the things that should stay in overlays_before. | |
3216 | All the rest of overlays_before must end even earlier, | |
3217 | so stop now. */ | |
3218 | break; | |
3219 | } | |
3220 | ||
3221 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3222 | prev = NULL; |
3223 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3224 | { |
2410d73a SM |
3225 | next = tail->next; |
3226 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3227 | |
3228 | /* If the overlay is not valid, get rid of it. */ | |
3229 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3230 | #if 1 |
3231 | abort (); | |
3232 | #else | |
2eec3b4e RS |
3233 | { |
3234 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3235 | if (!NILP (prev)) | |
7539e11f | 3236 | XCDR (prev) = next; |
2eec3b4e | 3237 | else |
5c4f68f1 | 3238 | buf->overlays_after = next; |
2eec3b4e RS |
3239 | tail = prev; |
3240 | continue; | |
3241 | } | |
52f8ec73 | 3242 | #endif |
2eec3b4e RS |
3243 | |
3244 | beg = OVERLAY_START (overlay); | |
3245 | end = OVERLAY_END (overlay); | |
3246 | ||
3247 | /* Stop looking, when we know that nothing further | |
3248 | can possibly end before POS. */ | |
3249 | if (OVERLAY_POSITION (beg) > pos) | |
3250 | break; | |
3251 | ||
3252 | if (OVERLAY_POSITION (end) <= pos) | |
3253 | { | |
3254 | /* OVERLAY needs to be moved. */ | |
145582a0 | 3255 | EMACS_INT where = OVERLAY_POSITION (end); |
2410d73a | 3256 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3257 | |
3258 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3259 | if (prev) |
3260 | prev->next = next; | |
2eec3b4e | 3261 | else |
5c4f68f1 | 3262 | buf->overlays_after = next; |
2eec3b4e RS |
3263 | |
3264 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3265 | other_prev = NULL; |
3266 | for (other = buf->overlays_before; other; | |
3267 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3268 | { |
3269 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3270 | |
2410d73a SM |
3271 | XSETMISC (otheroverlay, other); |
3272 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3273 | |
3274 | otherend = OVERLAY_END (otheroverlay); | |
3275 | if (OVERLAY_POSITION (otherend) <= where) | |
3276 | break; | |
3277 | } | |
3278 | ||
3279 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3280 | tail->next = other; |
3281 | if (other_prev) | |
3282 | other_prev->next = tail; | |
2eec3b4e | 3283 | else |
5c4f68f1 | 3284 | buf->overlays_before = tail; |
2eec3b4e RS |
3285 | tail = prev; |
3286 | } | |
3287 | } | |
3288 | ||
c2d5b10f | 3289 | buf->overlay_center = pos; |
2eec3b4e | 3290 | } |
2b1bdf65 | 3291 | |
423cdb46 | 3292 | void |
d3da34e0 | 3293 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3294 | { |
3295 | /* After an insertion, the lists are still sorted properly, | |
3296 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3297 | if (current_buffer->overlay_center >= pos) |
3298 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3299 | } |
3300 | ||
3301 | void | |
d3da34e0 | 3302 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3303 | { |
c2d5b10f | 3304 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3305 | /* The deletion was to our right. No change needed; the before- and |
3306 | after-lists are still consistent. */ | |
3307 | ; | |
c2d5b10f | 3308 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3309 | /* The deletion was to our left. We need to adjust the center value |
3310 | to account for the change in position, but the lists are consistent | |
3311 | given the new value. */ | |
c2d5b10f | 3312 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3313 | else |
3314 | /* We're right in the middle. There might be things on the after-list | |
3315 | that now belong on the before-list. Recentering will move them, | |
3316 | and also update the center point. */ | |
3317 | recenter_overlay_lists (current_buffer, pos); | |
3318 | } | |
3319 | ||
2b1bdf65 KH |
3320 | /* Fix up overlays that were garbled as a result of permuting markers |
3321 | in the range START through END. Any overlay with at least one | |
3322 | endpoint in this range will need to be unlinked from the overlay | |
3323 | list and reinserted in its proper place. | |
3324 | Such an overlay might even have negative size at this point. | |
6b61353c | 3325 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3326 | void |
145582a0 | 3327 | fix_start_end_in_overlays (register EMACS_INT start, register EMACS_INT end) |
2b1bdf65 | 3328 | { |
6af718a4 | 3329 | Lisp_Object overlay; |
5df8f01b PE |
3330 | struct Lisp_Overlay *before_list IF_LINT (= NULL); |
3331 | struct Lisp_Overlay *after_list IF_LINT (= NULL); | |
1138e742 KR |
3332 | /* These are either nil, indicating that before_list or after_list |
3333 | should be assigned, or the cons cell the cdr of which should be | |
3334 | assigned. */ | |
2410d73a | 3335 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3336 | /* 'Parent', likewise, indicates a cons cell or |
3337 | current_buffer->overlays_before or overlays_after, depending | |
3338 | which loop we're in. */ | |
2410d73a | 3339 | struct Lisp_Overlay *tail, *parent; |
145582a0 | 3340 | EMACS_INT startpos, endpos; |
2b1bdf65 KH |
3341 | |
3342 | /* This algorithm shifts links around instead of consing and GCing. | |
3343 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3344 | well-formed list except that its last element, the CDR of beforep |
3345 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3346 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3347 | that before_list isn't initialized, although it may look | |
3348 | strange. */ | |
2410d73a | 3349 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3350 | { |
2410d73a | 3351 | XSETMISC (overlay, tail); |
6b61353c | 3352 | |
2b1bdf65 | 3353 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3354 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3355 | ||
3356 | /* If the overlay is backwards, make it empty. */ | |
3357 | if (endpos < startpos) | |
3358 | { | |
3359 | startpos = endpos; | |
3360 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3361 | Qnil); | |
3362 | } | |
3363 | ||
2b1bdf65 KH |
3364 | if (endpos < start) |
3365 | break; | |
60ebfdf3 | 3366 | |
2b1bdf65 KH |
3367 | if (endpos < end |
3368 | || (startpos >= start && startpos < end)) | |
3369 | { | |
2b1bdf65 KH |
3370 | /* Add it to the end of the wrong list. Later on, |
3371 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3372 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3373 | { |
2410d73a | 3374 | if (!afterp) |
1138e742 KR |
3375 | after_list = tail; |
3376 | else | |
2410d73a | 3377 | afterp->next = tail; |
1138e742 | 3378 | afterp = tail; |
2b1bdf65 KH |
3379 | } |
3380 | else | |
3381 | { | |
2410d73a | 3382 | if (!beforep) |
1138e742 KR |
3383 | before_list = tail; |
3384 | else | |
2410d73a | 3385 | beforep->next = tail; |
1138e742 | 3386 | beforep = tail; |
2b1bdf65 | 3387 | } |
2410d73a SM |
3388 | if (!parent) |
3389 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3390 | else |
2410d73a SM |
3391 | parent->next = tail->next; |
3392 | tail = tail->next; | |
2b1bdf65 KH |
3393 | } |
3394 | else | |
2410d73a | 3395 | parent = tail, tail = parent->next; |
2b1bdf65 | 3396 | } |
2410d73a | 3397 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3398 | { |
2410d73a | 3399 | XSETMISC (overlay, tail); |
6b61353c | 3400 | |
2b1bdf65 | 3401 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3402 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3403 | ||
3404 | /* If the overlay is backwards, make it empty. */ | |
3405 | if (endpos < startpos) | |
3406 | { | |
3407 | startpos = endpos; | |
3408 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3409 | Qnil); |
6b61353c KH |
3410 | } |
3411 | ||
2b1bdf65 KH |
3412 | if (startpos >= end) |
3413 | break; | |
6b61353c | 3414 | |
2b1bdf65 KH |
3415 | if (startpos >= start |
3416 | || (endpos >= start && endpos < end)) | |
3417 | { | |
c2d5b10f | 3418 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3419 | { |
2410d73a | 3420 | if (!afterp) |
1138e742 KR |
3421 | after_list = tail; |
3422 | else | |
2410d73a | 3423 | afterp->next = tail; |
1138e742 | 3424 | afterp = tail; |
2b1bdf65 KH |
3425 | } |
3426 | else | |
3427 | { | |
2410d73a | 3428 | if (!beforep) |
1138e742 KR |
3429 | before_list = tail; |
3430 | else | |
2410d73a | 3431 | beforep->next = tail; |
1138e742 | 3432 | beforep = tail; |
2b1bdf65 | 3433 | } |
2410d73a SM |
3434 | if (!parent) |
3435 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3436 | else |
2410d73a SM |
3437 | parent->next = tail->next; |
3438 | tail = tail->next; | |
2b1bdf65 KH |
3439 | } |
3440 | else | |
2410d73a | 3441 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3442 | } |
3443 | ||
3444 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3445 | and let the recenter function make it sane again. */ | |
2410d73a | 3446 | if (beforep) |
1138e742 | 3447 | { |
2410d73a | 3448 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3449 | current_buffer->overlays_before = before_list; |
3450 | } | |
c2d5b10f | 3451 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3452 | |
2410d73a | 3453 | if (afterp) |
1138e742 | 3454 | { |
2410d73a | 3455 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3456 | current_buffer->overlays_after = after_list; |
3457 | } | |
c2d5b10f | 3458 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3459 | } |
3b06f880 KH |
3460 | |
3461 | /* We have two types of overlay: the one whose ending marker is | |
3462 | after-insertion-marker (this is the usual case) and the one whose | |
3463 | ending marker is before-insertion-marker. When `overlays_before' | |
3464 | contains overlays of the latter type and the former type in this | |
3465 | order and both overlays end at inserting position, inserting a text | |
3466 | increases only the ending marker of the latter type, which results | |
3467 | in incorrect ordering of `overlays_before'. | |
3468 | ||
3469 | This function fixes ordering of overlays in the slot | |
3470 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3471 | was at PREV, and now is at POS. */ | |
3472 | ||
01136e9b | 3473 | void |
d3da34e0 | 3474 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3475 | { |
2410d73a SM |
3476 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3477 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3478 | Lisp_Object tem; | |
5df8f01b | 3479 | EMACS_INT end IF_LINT (= 0); |
3b06f880 KH |
3480 | |
3481 | /* After the insertion, the several overlays may be in incorrect | |
3482 | order. The possibility is that, in the list `overlays_before', | |
3483 | an overlay which ends at POS appears after an overlay which ends | |
3484 | at PREV. Since POS is greater than PREV, we must fix the | |
3485 | ordering of these overlays, by moving overlays ends at POS before | |
3486 | the overlays ends at PREV. */ | |
3487 | ||
3488 | /* At first, find a place where disordered overlays should be linked | |
3489 | in. It is where an overlay which end before POS exists. (i.e. an | |
3490 | overlay whose ending marker is after-insertion-marker if disorder | |
3491 | exists). */ | |
2410d73a SM |
3492 | while (tail |
3493 | && (XSETMISC (tem, tail), | |
3494 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3495 | { |
3496 | parent = tail; | |
2410d73a | 3497 | tail = tail->next; |
1138e742 | 3498 | } |
3b06f880 KH |
3499 | |
3500 | /* If we don't find such an overlay, | |
3501 | or the found one ends before PREV, | |
3502 | or the found one is the last one in the list, | |
3503 | we don't have to fix anything. */ | |
f93ad4cf | 3504 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3505 | return; |
3506 | ||
1138e742 KR |
3507 | right_pair = parent; |
3508 | parent = tail; | |
2410d73a | 3509 | tail = tail->next; |
3b06f880 | 3510 | |
1138e742 | 3511 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3512 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3513 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3514 | we found an overlay which ends before PREV, the remaining | |
3515 | overlays are in correct order. */ | |
2410d73a | 3516 | while (tail) |
3b06f880 | 3517 | { |
2410d73a SM |
3518 | XSETMISC (tem, tail); |
3519 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3520 | |
3521 | if (end == pos) | |
3522 | { /* This overlay is disordered. */ | |
2410d73a | 3523 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3524 | |
3525 | /* Unlink the found overlay. */ | |
2410d73a SM |
3526 | tail = found->next; |
3527 | parent->next = tail; | |
1138e742 KR |
3528 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3529 | and link it into the right place. */ | |
2410d73a | 3530 | if (!right_pair) |
1138e742 | 3531 | { |
2410d73a | 3532 | found->next = bp->overlays_before; |
1138e742 KR |
3533 | bp->overlays_before = found; |
3534 | } | |
3535 | else | |
3536 | { | |
2410d73a SM |
3537 | found->next = right_pair->next; |
3538 | right_pair->next = found; | |
1138e742 | 3539 | } |
3b06f880 KH |
3540 | } |
3541 | else if (end == prev) | |
1138e742 KR |
3542 | { |
3543 | parent = tail; | |
2410d73a | 3544 | tail = tail->next; |
1138e742 | 3545 | } |
3b06f880 KH |
3546 | else /* No more disordered overlay. */ |
3547 | break; | |
3548 | } | |
3549 | } | |
2eec3b4e | 3550 | \f |
52f8ec73 | 3551 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3552 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3553 | (Lisp_Object object) |
52f8ec73 JB |
3554 | { |
3555 | return (OVERLAYP (object) ? Qt : Qnil); | |
3556 | } | |
3557 | ||
acac2700 | 3558 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3559 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3560 | If omitted, BUFFER defaults to the current buffer. |
3561 | BEG and END may be integers or markers. | |
a625ee20 RS |
3562 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3563 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3564 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3565 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3566 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3567 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3568 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3569 | { |
3570 | Lisp_Object overlay; | |
5c4f68f1 | 3571 | struct buffer *b; |
2eec3b4e | 3572 | |
5c4f68f1 | 3573 | if (NILP (buffer)) |
67180c6a | 3574 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3575 | else |
b7826503 | 3576 | CHECK_BUFFER (buffer); |
883047b9 JB |
3577 | if (MARKERP (beg) |
3578 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3579 | error ("Marker points into wrong buffer"); | |
3580 | if (MARKERP (end) | |
3581 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3582 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3583 | |
b7826503 PJ |
3584 | CHECK_NUMBER_COERCE_MARKER (beg); |
3585 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3586 | |
883047b9 | 3587 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3588 | { |
c99fc30f KH |
3589 | Lisp_Object temp; |
3590 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3591 | } |
883047b9 JB |
3592 | |
3593 | b = XBUFFER (buffer); | |
3594 | ||
3595 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3596 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3597 | |
acac2700 RS |
3598 | if (!NILP (front_advance)) |
3599 | XMARKER (beg)->insertion_type = 1; | |
3600 | if (!NILP (rear_advance)) | |
3601 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3602 | |
48e2e3ba | 3603 | overlay = allocate_misc (); |
89ca3e1b | 3604 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3605 | XOVERLAY (overlay)->start = beg; |
3606 | XOVERLAY (overlay)->end = end; | |
3607 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3608 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3609 | |
177c0ea7 | 3610 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3611 | end = OVERLAY_END (overlay); |
c2d5b10f | 3612 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3613 | { |
3614 | if (b->overlays_after) | |
3615 | XOVERLAY (overlay)->next = b->overlays_after; | |
3616 | b->overlays_after = XOVERLAY (overlay); | |
3617 | } | |
2eec3b4e | 3618 | else |
2410d73a SM |
3619 | { |
3620 | if (b->overlays_before) | |
3621 | XOVERLAY (overlay)->next = b->overlays_before; | |
3622 | b->overlays_before = XOVERLAY (overlay); | |
3623 | } | |
2eec3b4e RS |
3624 | |
3625 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3626 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3627 | |
b61982dd JB |
3628 | /* We don't need to redisplay the region covered by the overlay, because |
3629 | the overlay has no properties at the moment. */ | |
3630 | ||
2eec3b4e RS |
3631 | return overlay; |
3632 | } | |
876aa27c RS |
3633 | \f |
3634 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3635 | ||
3636 | static void | |
d3da34e0 | 3637 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3638 | { |
876aa27c RS |
3639 | if (start > end) |
3640 | { | |
145582a0 | 3641 | EMACS_INT temp = start; |
26f545d7 GM |
3642 | start = end; |
3643 | end = temp; | |
876aa27c RS |
3644 | } |
3645 | ||
481b5054 | 3646 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3647 | |
876aa27c RS |
3648 | /* If this is a buffer not in the selected window, |
3649 | we must do other windows. */ | |
3650 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3651 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3652 | /* If multiple windows show this buffer, we must do other windows. */ |
3653 | else if (buffer_shared > 1) | |
3654 | windows_or_buffers_changed = 1; | |
18700091 KS |
3655 | /* If we modify an overlay at the end of the buffer, we cannot |
3656 | be sure that window end is still valid. */ | |
3657 | else if (end >= ZV && start <= ZV) | |
3658 | windows_or_buffers_changed = 1; | |
876aa27c | 3659 | |
d8b9150f | 3660 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3661 | } |
2eec3b4e | 3662 | |
018ba359 | 3663 | \f |
2410d73a | 3664 | static struct Lisp_Overlay * |
d3da34e0 | 3665 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3666 | { |
3667 | struct Lisp_Overlay *tmp, *prev; | |
3668 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3669 | if (tmp == overlay) | |
3670 | { | |
3671 | if (prev) | |
3672 | prev->next = tmp->next; | |
3673 | else | |
3674 | list = tmp->next; | |
3675 | overlay->next = NULL; | |
3676 | break; | |
3677 | } | |
3678 | return list; | |
3679 | } | |
3680 | ||
5c4f68f1 | 3681 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3682 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3683 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3684 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3685 | buffer. */) |
5842a27b | 3686 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3687 | { |
0a4469c9 RS |
3688 | struct buffer *b, *ob; |
3689 | Lisp_Object obuffer; | |
aed13378 | 3690 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3691 | |
b7826503 | 3692 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3693 | if (NILP (buffer)) |
3694 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3695 | if (NILP (buffer)) |
67180c6a | 3696 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3697 | CHECK_BUFFER (buffer); |
883047b9 JB |
3698 | |
3699 | if (MARKERP (beg) | |
3700 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3701 | error ("Marker points into wrong buffer"); | |
3702 | if (MARKERP (end) | |
3703 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3704 | error ("Marker points into wrong buffer"); | |
3705 | ||
b7826503 PJ |
3706 | CHECK_NUMBER_COERCE_MARKER (beg); |
3707 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3708 | |
9d7608b7 KH |
3709 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3710 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3711 | |
b61982dd JB |
3712 | if (XINT (beg) > XINT (end)) |
3713 | { | |
c99fc30f KH |
3714 | Lisp_Object temp; |
3715 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3716 | } |
3717 | ||
9d7608b7 KH |
3718 | specbind (Qinhibit_quit, Qt); |
3719 | ||
0a4469c9 | 3720 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3721 | b = XBUFFER (buffer); |
8801a864 | 3722 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3723 | |
c82ed728 | 3724 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3725 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3726 | { |
3727 | /* Redisplay where the overlay was. */ | |
3728 | if (!NILP (obuffer)) | |
3729 | { | |
145582a0 EZ |
3730 | EMACS_INT o_beg; |
3731 | EMACS_INT o_end; | |
50760c4a | 3732 | |
80509f2f RS |
3733 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3734 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3735 | |
2e34157c | 3736 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3737 | } |
3738 | ||
3739 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3740 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3741 | } |
c82ed728 JB |
3742 | else |
3743 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3744 | { | |
145582a0 | 3745 | EMACS_INT o_beg, o_end; |
c82ed728 | 3746 | |
80509f2f RS |
3747 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3748 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3749 | |
2e34157c RS |
3750 | if (o_beg == XINT (beg)) |
3751 | modify_overlay (b, o_end, XINT (end)); | |
3752 | else if (o_end == XINT (end)) | |
3753 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3754 | else |
3755 | { | |
2e34157c RS |
3756 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3757 | if (XINT (end) > o_end) o_end = XINT (end); | |
3758 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3759 | } |
3760 | } | |
b61982dd | 3761 | |
0a4469c9 RS |
3762 | if (!NILP (obuffer)) |
3763 | { | |
2410d73a SM |
3764 | ob->overlays_before |
3765 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3766 | ob->overlays_after | |
3767 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3768 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3769 | } |
5c4f68f1 JB |
3770 | |
3771 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3772 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3773 | |
177c0ea7 | 3774 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3775 | end = OVERLAY_END (overlay); |
c2d5b10f | 3776 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3777 | { |
8f924df7 KH |
3778 | XOVERLAY (overlay)->next = b->overlays_after; |
3779 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3780 | } |
2eec3b4e | 3781 | else |
2410d73a | 3782 | { |
8f924df7 KH |
3783 | XOVERLAY (overlay)->next = b->overlays_before; |
3784 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3785 | } |
2eec3b4e RS |
3786 | |
3787 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3788 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3789 | |
0a4469c9 | 3790 | return unbind_to (count, overlay); |
2eec3b4e RS |
3791 | } |
3792 | ||
3793 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3794 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3795 | (Lisp_Object overlay) |
2eec3b4e | 3796 | { |
0a4469c9 | 3797 | Lisp_Object buffer; |
5c4f68f1 | 3798 | struct buffer *b; |
aed13378 | 3799 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3800 | |
b7826503 | 3801 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3802 | |
0a4469c9 RS |
3803 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3804 | if (NILP (buffer)) | |
3805 | return Qnil; | |
3806 | ||
3807 | b = XBUFFER (buffer); | |
0a4469c9 | 3808 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3809 | |
2410d73a SM |
3810 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3811 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3812 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3813 | modify_overlay (b, |
8231a9aa RS |
3814 | marker_position (OVERLAY_START (overlay)), |
3815 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3816 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3817 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3818 | ||
e58c389d | 3819 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3820 | display optimizations for the affected buffer, on the basis that |
3821 | these strings may contain newlines. This is easier to do than to | |
3822 | check for that situation during redisplay. */ | |
3823 | if (!windows_or_buffers_changed | |
3824 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3825 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3826 | b->prevent_redisplay_optimizations_p = 1; | |
3827 | ||
0a4469c9 | 3828 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3829 | } |
3830 | \f | |
8ebafa8d JB |
3831 | /* Overlay dissection functions. */ |
3832 | ||
a7ca3326 | 3833 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
7ee72033 | 3834 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3835 | (Lisp_Object overlay) |
8ebafa8d | 3836 | { |
b7826503 | 3837 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3838 | |
3839 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3840 | } | |
3841 | ||
a7ca3326 | 3842 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
7ee72033 | 3843 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3844 | (Lisp_Object overlay) |
8ebafa8d | 3845 | { |
b7826503 | 3846 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3847 | |
3848 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3849 | } | |
3850 | ||
3851 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3852 | doc: /* Return the buffer OVERLAY belongs to. |
3853 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3854 | (Lisp_Object overlay) |
8ebafa8d | 3855 | { |
b7826503 | 3856 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3857 | |
3858 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3859 | } | |
3860 | ||
3861 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3862 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3863 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3864 | OVERLAY. */) |
5842a27b | 3865 | (Lisp_Object overlay) |
8ebafa8d | 3866 | { |
b7826503 | 3867 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3868 | |
48e2e3ba | 3869 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3870 | } |
3871 | ||
3872 | \f | |
2eec3b4e | 3873 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3874 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3875 | (Lisp_Object pos) |
2eec3b4e | 3876 | { |
b081724f | 3877 | ptrdiff_t len, noverlays; |
2eec3b4e | 3878 | Lisp_Object *overlay_vec; |
2eec3b4e RS |
3879 | Lisp_Object result; |
3880 | ||
b7826503 | 3881 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3882 | |
3883 | len = 10; | |
a9800ae8 | 3884 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3885 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3886 | ||
3887 | /* Put all the overlays we want in a vector in overlay_vec. | |
3888 | Store the length in len. */ | |
2a77a7d7 | 3889 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3890 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
3891 | |
3892 | /* Make a list of them all. */ | |
3893 | result = Flist (noverlays, overlay_vec); | |
3894 | ||
9ac0d9e0 | 3895 | xfree (overlay_vec); |
2eec3b4e RS |
3896 | return result; |
3897 | } | |
3898 | ||
74514898 | 3899 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3900 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3901 | Overlap means that at least one character is contained within the overlay |
3902 | and also contained within the specified region. | |
7723e095 MR |
3903 | Empty overlays are included in the result if they are located at BEG, |
3904 | between BEG and END, or at END provided END denotes the position at the | |
3905 | end of the buffer. */) | |
5842a27b | 3906 | (Lisp_Object beg, Lisp_Object end) |
74514898 | 3907 | { |
21514da7 | 3908 | ptrdiff_t len, noverlays; |
74514898 | 3909 | Lisp_Object *overlay_vec; |
74514898 RS |
3910 | Lisp_Object result; |
3911 | ||
b7826503 PJ |
3912 | CHECK_NUMBER_COERCE_MARKER (beg); |
3913 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3914 | |
3915 | len = 10; | |
3916 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3917 | ||
3918 | /* Put all the overlays we want in a vector in overlay_vec. | |
3919 | Store the length in len. */ | |
3920 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
145582a0 | 3921 | NULL, NULL); |
74514898 RS |
3922 | |
3923 | /* Make a list of them all. */ | |
3924 | result = Flist (noverlays, overlay_vec); | |
3925 | ||
3926 | xfree (overlay_vec); | |
3927 | return result; | |
3928 | } | |
3929 | ||
a7ca3326 | 3930 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3931 | 1, 1, 0, |
7ee72033 | 3932 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3933 | If there are no overlay boundaries from POS to (point-max), |
3934 | the value is (point-max). */) | |
5842a27b | 3935 | (Lisp_Object pos) |
2eec3b4e | 3936 | { |
b081724f | 3937 | ptrdiff_t i, len, noverlays; |
0f8b27ea | 3938 | EMACS_INT endpos; |
2eec3b4e | 3939 | Lisp_Object *overlay_vec; |
2eec3b4e | 3940 | |
b7826503 | 3941 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3942 | |
3943 | len = 10; | |
3944 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3945 | ||
3946 | /* Put all the overlays we want in a vector in overlay_vec. | |
3947 | Store the length in len. | |
3948 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3949 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 3950 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
3951 | |
3952 | /* If any of these overlays ends before endpos, | |
3953 | use its ending point instead. */ | |
3954 | for (i = 0; i < noverlays; i++) | |
3955 | { | |
3956 | Lisp_Object oend; | |
0f8b27ea | 3957 | EMACS_INT oendpos; |
2eec3b4e RS |
3958 | |
3959 | oend = OVERLAY_END (overlay_vec[i]); | |
3960 | oendpos = OVERLAY_POSITION (oend); | |
3961 | if (oendpos < endpos) | |
3962 | endpos = oendpos; | |
1ab256cb RM |
3963 | } |
3964 | ||
9ac0d9e0 | 3965 | xfree (overlay_vec); |
2eec3b4e RS |
3966 | return make_number (endpos); |
3967 | } | |
239c932b | 3968 | |
a7ca3326 | 3969 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
239c932b | 3970 | Sprevious_overlay_change, 1, 1, 0, |
7ee72033 | 3971 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
3972 | If there are no overlay boundaries from (point-min) to POS, |
3973 | the value is (point-min). */) | |
5842a27b | 3974 | (Lisp_Object pos) |
239c932b | 3975 | { |
0f8b27ea | 3976 | EMACS_INT prevpos; |
239c932b | 3977 | Lisp_Object *overlay_vec; |
b081724f | 3978 | ptrdiff_t len; |
239c932b | 3979 | |
b7826503 | 3980 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 3981 | |
624bbdc4 RS |
3982 | /* At beginning of buffer, we know the answer; |
3983 | avoid bug subtracting 1 below. */ | |
3984 | if (XINT (pos) == BEGV) | |
3985 | return pos; | |
3986 | ||
017f0539 GM |
3987 | len = 10; |
3988 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3989 | ||
239c932b RS |
3990 | /* Put all the overlays we want in a vector in overlay_vec. |
3991 | Store the length in len. | |
daa1c109 | 3992 | prevpos gets the position of the previous change. */ |
328ab8e7 PE |
3993 | overlays_at (XINT (pos), 1, &overlay_vec, &len, |
3994 | (EMACS_INT *) 0, &prevpos, 1); | |
239c932b | 3995 | |
239c932b RS |
3996 | xfree (overlay_vec); |
3997 | return make_number (prevpos); | |
3998 | } | |
2eec3b4e RS |
3999 | \f |
4000 | /* These functions are for debugging overlays. */ | |
4001 | ||
4002 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4003 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4004 | The car has all the overlays before the overlay center; |
4005 | the cdr has all the overlays after the overlay center. | |
4006 | Recentering overlays moves overlays between these lists. | |
4007 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4008 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4009 | (void) |
2eec3b4e | 4010 | { |
2410d73a SM |
4011 | struct Lisp_Overlay *ol; |
4012 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4013 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4014 | { | |
4015 | XSETMISC (tmp, ol); | |
4016 | before = Fcons (tmp, before); | |
4017 | } | |
4018 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4019 | { | |
4020 | XSETMISC (tmp, ol); | |
4021 | after = Fcons (tmp, after); | |
4022 | } | |
4023 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4024 | } |
4025 | ||
4026 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4027 | doc: /* Recenter the overlays of the current buffer around position POS. |
4028 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4029 | for positions far away from POS). */) | |
5842a27b | 4030 | (Lisp_Object pos) |
2eec3b4e | 4031 | { |
b7826503 | 4032 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4033 | |
5c4f68f1 | 4034 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4035 | return Qnil; |
4036 | } | |
4037 | \f | |
a7ca3326 | 4038 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
7ee72033 | 4039 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4040 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4041 | { |
b7826503 | 4042 | CHECK_OVERLAY (overlay); |
9a593927 | 4043 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4044 | } |
4045 | ||
4046 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7c301272 LMI |
4047 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. |
4048 | VALUE will be returned.*/) | |
5842a27b | 4049 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4050 | { |
48e2e3ba | 4051 | Lisp_Object tail, buffer; |
9d7608b7 | 4052 | int changed; |
2eec3b4e | 4053 | |
b7826503 | 4054 | CHECK_OVERLAY (overlay); |
b61982dd | 4055 | |
274a9425 RS |
4056 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4057 | ||
48e2e3ba | 4058 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4059 | CONSP (tail) && CONSP (XCDR (tail)); |
4060 | tail = XCDR (XCDR (tail))) | |
4061 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4062 | { |
7539e11f | 4063 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4064 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4065 | goto found; |
274a9425 | 4066 | } |
9d7608b7 KH |
4067 | /* It wasn't in the list, so add it to the front. */ |
4068 | changed = !NILP (value); | |
48e2e3ba KH |
4069 | XOVERLAY (overlay)->plist |
4070 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4071 | found: |
4072 | if (! NILP (buffer)) | |
4073 | { | |
4074 | if (changed) | |
876aa27c | 4075 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4076 | marker_position (OVERLAY_START (overlay)), |
4077 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4078 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4079 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4080 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4081 | Fdelete_overlay (overlay); | |
4082 | } | |
7d63db98 | 4083 | |
2eec3b4e | 4084 | return value; |
1ab256cb RM |
4085 | } |
4086 | \f | |
9115729e KH |
4087 | /* Subroutine of report_overlay_modification. */ |
4088 | ||
4089 | /* Lisp vector holding overlay hook functions to call. | |
4090 | Vector elements come in pairs. | |
4091 | Each even-index element is a list of hook functions. | |
4092 | The following odd-index element is the overlay they came from. | |
4093 | ||
4094 | Before the buffer change, we fill in this vector | |
4095 | as we call overlay hook functions. | |
4096 | After the buffer change, we get the functions to call from this vector. | |
4097 | This way we always call the same functions before and after the change. */ | |
4098 | static Lisp_Object last_overlay_modification_hooks; | |
4099 | ||
4100 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4101 | static int last_overlay_modification_hooks_used; | |
4102 | ||
4103 | /* Add one functionlist/overlay pair | |
4104 | to the end of last_overlay_modification_hooks. */ | |
4105 | ||
4106 | static void | |
d3da34e0 | 4107 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e | 4108 | { |
77b37c05 | 4109 | int oldsize = ASIZE (last_overlay_modification_hooks); |
9115729e KH |
4110 | |
4111 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4112 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4113 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4114 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4115 | functionlist); last_overlay_modification_hooks_used++; | |
4116 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4117 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4118 | } |
4119 | \f | |
173f2a64 RS |
4120 | /* Run the modification-hooks of overlays that include |
4121 | any part of the text in START to END. | |
9115729e KH |
4122 | If this change is an insertion, also |
4123 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4124 | and the insert-after-hooks of overlay ending at START. |
4125 | ||
4126 | This is called both before and after the modification. | |
4127 | AFTER is nonzero when we call after the modification. | |
4128 | ||
9115729e KH |
4129 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4130 | When AFTER is nonzero, they are the start position, | |
4131 | the position after the inserted new text, | |
4132 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4133 | |
4134 | void | |
d3da34e0 JB |
4135 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4136 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4137 | { |
2410d73a SM |
4138 | Lisp_Object prop, overlay; |
4139 | struct Lisp_Overlay *tail; | |
9115729e KH |
4140 | /* 1 if this change is an insertion. */ |
4141 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4142 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4143 | |
4144 | overlay = Qnil; | |
2410d73a | 4145 | tail = NULL; |
9115729e | 4146 | |
27c6b98e SM |
4147 | /* We used to run the functions as soon as we found them and only register |
4148 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4149 | case. But running elisp code as we traverse the list of overlays is | |
4150 | painful because the list can be modified by the elisp code so we had to | |
4151 | copy at several places. We now simply do a read-only traversal that | |
4152 | only collects the functions to run and we run them afterwards. It's | |
4153 | simpler, especially since all the code was already there. -stef */ | |
4154 | ||
a615c6dc | 4155 | if (!after) |
173f2a64 | 4156 | { |
a615c6dc SM |
4157 | /* We are being called before a change. |
4158 | Scan the overlays to find the functions to call. */ | |
4159 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4160 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4161 | { |
145582a0 | 4162 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4163 | Lisp_Object ostart, oend; |
4164 | ||
2410d73a | 4165 | XSETMISC (overlay, tail); |
a615c6dc SM |
4166 | |
4167 | ostart = OVERLAY_START (overlay); | |
4168 | oend = OVERLAY_END (overlay); | |
4169 | endpos = OVERLAY_POSITION (oend); | |
4170 | if (XFASTINT (start) > endpos) | |
4171 | break; | |
4172 | startpos = OVERLAY_POSITION (ostart); | |
4173 | if (insertion && (XFASTINT (start) == startpos | |
4174 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4175 | { |
a615c6dc SM |
4176 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4177 | if (!NILP (prop)) | |
4178 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4179 | } |
a615c6dc SM |
4180 | if (insertion && (XFASTINT (start) == endpos |
4181 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4182 | { |
a615c6dc SM |
4183 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4184 | if (!NILP (prop)) | |
4185 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4186 | } |
a615c6dc SM |
4187 | /* Test for intersecting intervals. This does the right thing |
4188 | for both insertion and deletion. */ | |
4189 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4190 | { |
a615c6dc SM |
4191 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4192 | if (!NILP (prop)) | |
4193 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4194 | } |
173f2a64 | 4195 | } |
60ebfdf3 | 4196 | |
2410d73a | 4197 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4198 | { |
145582a0 | 4199 | EMACS_INT startpos, endpos; |
a615c6dc SM |
4200 | Lisp_Object ostart, oend; |
4201 | ||
2410d73a | 4202 | XSETMISC (overlay, tail); |
a615c6dc SM |
4203 | |
4204 | ostart = OVERLAY_START (overlay); | |
4205 | oend = OVERLAY_END (overlay); | |
4206 | startpos = OVERLAY_POSITION (ostart); | |
4207 | endpos = OVERLAY_POSITION (oend); | |
4208 | if (XFASTINT (end) < startpos) | |
4209 | break; | |
4210 | if (insertion && (XFASTINT (start) == startpos | |
4211 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4212 | { |
a615c6dc SM |
4213 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4214 | if (!NILP (prop)) | |
4215 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4216 | } |
a615c6dc SM |
4217 | if (insertion && (XFASTINT (start) == endpos |
4218 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4219 | { |
a615c6dc SM |
4220 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4221 | if (!NILP (prop)) | |
4222 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4223 | } |
a615c6dc SM |
4224 | /* Test for intersecting intervals. This does the right thing |
4225 | for both insertion and deletion. */ | |
4226 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4227 | { |
a615c6dc SM |
4228 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4229 | if (!NILP (prop)) | |
4230 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4231 | } |
173f2a64 RS |
4232 | } |
4233 | } | |
55b48893 | 4234 | |
a615c6dc SM |
4235 | GCPRO4 (overlay, arg1, arg2, arg3); |
4236 | { | |
4237 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4238 | First copy the vector contents, in case some of these hooks | |
4239 | do subsequent modification of the buffer. */ | |
4240 | int size = last_overlay_modification_hooks_used; | |
4241 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4242 | int i; | |
4243 | ||
72af86bd AS |
4244 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4245 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4246 | gcpro1.var = copy; |
4247 | gcpro1.nvars = size; | |
4248 | ||
4249 | for (i = 0; i < size;) | |
4250 | { | |
8f54f30a PE |
4251 | Lisp_Object prop_i, overlay_i; |
4252 | prop_i = copy[i++]; | |
4253 | overlay_i = copy[i++]; | |
4254 | call_overlay_mod_hooks (prop_i, overlay_i, after, arg1, arg2, arg3); | |
a615c6dc SM |
4255 | } |
4256 | } | |
55b48893 | 4257 | UNGCPRO; |
173f2a64 RS |
4258 | } |
4259 | ||
4260 | static void | |
d3da34e0 JB |
4261 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4262 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4263 | { |
930a9140 | 4264 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4265 | |
930a9140 | 4266 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4267 | |
6d70a280 | 4268 | while (CONSP (list)) |
173f2a64 | 4269 | { |
930a9140 | 4270 | if (NILP (arg3)) |
6d70a280 | 4271 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4272 | else |
6d70a280 SM |
4273 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4274 | list = XCDR (list); | |
173f2a64 RS |
4275 | } |
4276 | UNGCPRO; | |
4277 | } | |
9d7608b7 KH |
4278 | |
4279 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4280 | property is set. */ | |
4281 | void | |
d3da34e0 | 4282 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4283 | { |
2410d73a SM |
4284 | Lisp_Object overlay, hit_list; |
4285 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4286 | |
4287 | hit_list = Qnil; | |
c2d5b10f | 4288 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4289 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 | 4290 | { |
145582a0 | 4291 | EMACS_INT endpos; |
2410d73a | 4292 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4293 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4294 | if (endpos < pos) | |
4295 | break; | |
4296 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4297 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4298 | hit_list = Fcons (overlay, hit_list); |
4299 | } | |
4300 | else | |
2410d73a | 4301 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 | 4302 | { |
145582a0 | 4303 | EMACS_INT startpos; |
2410d73a | 4304 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4305 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4306 | if (startpos > pos) | |
4307 | break; | |
4308 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4309 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4310 | hit_list = Fcons (overlay, hit_list); |
4311 | } | |
7539e11f KR |
4312 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4313 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4314 | } |
173f2a64 | 4315 | \f |
54dfdeb0 | 4316 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4317 | in the slot with offset OFFSET. */ |
4318 | ||
0fa3ba92 | 4319 | void |
d3da34e0 | 4320 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4321 | { |
ad97b375 | 4322 | Lisp_Object predicate; |
177c0ea7 | 4323 | |
64e16c3c | 4324 | switch (type) |
0fa3ba92 | 4325 | { |
2de9f71c | 4326 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4327 | case Lisp_String: predicate = Qstringp; break; |
4328 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4329 | default: abort (); | |
0fa3ba92 JB |
4330 | } |
4331 | ||
ad97b375 | 4332 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4333 | } |
7c02e886 | 4334 | |
0fa3ba92 | 4335 | \f |
b86af064 GM |
4336 | /*********************************************************************** |
4337 | Allocation with mmap | |
4338 | ***********************************************************************/ | |
4339 | ||
4340 | #ifdef USE_MMAP_FOR_BUFFERS | |
4341 | ||
4342 | #include <sys/types.h> | |
4343 | #include <sys/mman.h> | |
4344 | ||
4345 | #ifndef MAP_ANON | |
4346 | #ifdef MAP_ANONYMOUS | |
4347 | #define MAP_ANON MAP_ANONYMOUS | |
4348 | #else | |
4349 | #define MAP_ANON 0 | |
4350 | #endif | |
4351 | #endif | |
4352 | ||
09dfdf85 GM |
4353 | #ifndef MAP_FAILED |
4354 | #define MAP_FAILED ((void *) -1) | |
4355 | #endif | |
4356 | ||
b86af064 | 4357 | #include <stdio.h> |
b86af064 GM |
4358 | |
4359 | #if MAP_ANON == 0 | |
4360 | #include <fcntl.h> | |
4361 | #endif | |
4362 | ||
4363 | #include "coding.h" | |
4364 | ||
4365 | ||
4366 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4367 | The current implementation lets the system select mapped | |
4368 | addresses; we're not using MAP_FIXED in general, except when | |
4369 | trying to enlarge regions. | |
4370 | ||
4371 | Each mapped region starts with a mmap_region structure, the user | |
4372 | area starts after that structure, aligned to MEM_ALIGN. | |
4373 | ||
4374 | +-----------------------+ | |
4375 | | struct mmap_info + | | |
4376 | | padding | | |
4377 | +-----------------------+ | |
4378 | | user data | | |
4379 | | | | |
4380 | | | | |
4381 | +-----------------------+ */ | |
4382 | ||
4383 | struct mmap_region | |
4384 | { | |
4385 | /* User-specified size. */ | |
4386 | size_t nbytes_specified; | |
177c0ea7 | 4387 | |
b86af064 GM |
4388 | /* Number of bytes mapped */ |
4389 | size_t nbytes_mapped; | |
4390 | ||
4391 | /* Pointer to the location holding the address of the memory | |
4392 | allocated with the mmap'd block. The variable actually points | |
4393 | after this structure. */ | |
4394 | POINTER_TYPE **var; | |
4395 | ||
4396 | /* Next and previous in list of all mmap'd regions. */ | |
4397 | struct mmap_region *next, *prev; | |
4398 | }; | |
4399 | ||
4400 | /* Doubly-linked list of mmap'd regions. */ | |
4401 | ||
4402 | static struct mmap_region *mmap_regions; | |
4403 | ||
4404 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4405 | /dev/zero will be opened on it. */ | |
4406 | ||
4407 | static int mmap_fd; | |
4408 | ||
4409 | /* Temporary storage for mmap_set_vars, see there. */ | |
4410 | ||
4411 | static struct mmap_region *mmap_regions_1; | |
4412 | static int mmap_fd_1; | |
4413 | ||
4414 | /* Page size on this system. */ | |
4415 | ||
4416 | static int mmap_page_size; | |
4417 | ||
cd1181db | 4418 | /* 1 means mmap has been initialized. */ |
b86af064 GM |
4419 | |
4420 | static int mmap_initialized_p; | |
4421 | ||
4422 | /* Value is X rounded up to the next multiple of N. */ | |
4423 | ||
4424 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4425 | ||
4426 | /* Size of mmap_region structure plus padding. */ | |
4427 | ||
4428 | #define MMAP_REGION_STRUCT_SIZE \ | |
4429 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4430 | ||
4431 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4432 | region, return a pointer to the start of the region. */ | |
4433 | ||
4434 | #define MMAP_REGION(P) \ | |
4435 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4436 | ||
4437 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4438 | to the start of the user-visible part of the region. */ | |
4439 | ||
4440 | #define MMAP_USER_AREA(P) \ | |
4441 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4442 | ||
4443 | #define MEM_ALIGN sizeof (double) | |
4444 | ||
7273faa1 DL |
4445 | /* Predicate returning true if part of the address range [START .. END] |
4446 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4447 | memory mapping. |
4448 | ||
da6062e6 | 4449 | Default is to conservatively assume the address range is occupied by |
08327b22 GM |
4450 | something else. This can be overridden by system configuration |
4451 | files if system-specific means to determine this exists. */ | |
4452 | ||
4453 | #ifndef MMAP_ALLOCATED_P | |
4454 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4455 | #endif | |
4456 | ||
53964682 | 4457 | /* Perform necessary initializations for the use of mmap. */ |
b86af064 | 4458 | |
1dae0f0a AS |
4459 | static void |
4460 | mmap_init (void) | |
4461 | { | |
4462 | #if MAP_ANON == 0 | |
4463 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4464 | in a dumped Emacs. */ | |
4465 | if (mmap_fd <= 0) | |
4466 | { | |
4467 | /* No anonymous mmap -- we need the file descriptor. */ | |
4468 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4469 | if (mmap_fd == -1) | |
4470 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4471 | } | |
4472 | #endif /* MAP_ANON == 0 */ | |
4473 | ||
4474 | if (mmap_initialized_p) | |
4475 | return; | |
4476 | mmap_initialized_p = 1; | |
b86af064 | 4477 | |
1dae0f0a AS |
4478 | #if MAP_ANON != 0 |
4479 | mmap_fd = -1; | |
4480 | #endif | |
4481 | ||
4482 | mmap_page_size = getpagesize (); | |
4483 | } | |
b86af064 GM |
4484 | |
4485 | /* Return a region overlapping address range START...END, or null if | |
4486 | none. END is not including, i.e. the last byte in the range | |
4487 | is at END - 1. */ | |
4488 | ||
4489 | static struct mmap_region * | |
0be0ce47 | 4490 | mmap_find (POINTER_TYPE *start, POINTER_TYPE *end) |
b86af064 GM |
4491 | { |
4492 | struct mmap_region *r; | |
4493 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4494 | |
b86af064 GM |
4495 | for (r = mmap_regions; r; r = r->next) |
4496 | { | |
4497 | char *rstart = (char *) r; | |
4498 | char *rend = rstart + r->nbytes_mapped; | |
4499 | ||
4500 | if (/* First byte of range, i.e. START, in this region? */ | |
4501 | (s >= rstart && s < rend) | |
4502 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4503 | || (e > rstart && e <= rend) | |
4504 | /* First byte of this region in the range? */ | |
4505 | || (rstart >= s && rstart < e) | |
4506 | /* Last byte of this region in the range? */ | |
4507 | || (rend > s && rend <= e)) | |
4508 | break; | |
4509 | } | |
4510 | ||
4511 | return r; | |
4512 | } | |
4513 | ||
4514 | ||
4515 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4516 | the region. Value is non-zero if successful. */ | |
4517 | ||
4518 | static int | |
1dae0f0a | 4519 | mmap_free_1 (struct mmap_region *r) |
b86af064 GM |
4520 | { |
4521 | if (r->next) | |
4522 | r->next->prev = r->prev; | |
4523 | if (r->prev) | |
4524 | r->prev->next = r->next; | |
4525 | else | |
4526 | mmap_regions = r->next; | |
177c0ea7 | 4527 | |
1a15cca0 | 4528 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4529 | { |
4530 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4531 | return 0; | |
4532 | } | |
4533 | ||
4534 | return 1; | |
4535 | } | |
4536 | ||
4537 | ||
4538 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4539 | Value is non-zero if successful. */ | |
4540 | ||
4541 | static int | |
1dae0f0a | 4542 | mmap_enlarge (struct mmap_region *r, int npages) |
b86af064 GM |
4543 | { |
4544 | char *region_end = (char *) r + r->nbytes_mapped; | |
4545 | size_t nbytes; | |
4546 | int success = 0; | |
4547 | ||
4548 | if (npages < 0) | |
4549 | { | |
4550 | /* Unmap pages at the end of the region. */ | |
4551 | nbytes = - npages * mmap_page_size; | |
4552 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4553 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4554 | else | |
4555 | { | |
4556 | r->nbytes_mapped -= nbytes; | |
4557 | success = 1; | |
4558 | } | |
4559 | } | |
4560 | else if (npages > 0) | |
4561 | { | |
b86af064 | 4562 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4563 | |
b86af064 GM |
4564 | /* Try to map additional pages at the end of the region. We |
4565 | cannot do this if the address range is already occupied by | |
4566 | something else because mmap deletes any previous mapping. | |
4567 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4568 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4569 | { |
4570 | POINTER_TYPE *p; | |
177c0ea7 | 4571 | |
b86af064 GM |
4572 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4573 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4574 | if (p == MAP_FAILED) | |
edaa9aed | 4575 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4576 | else if (p != (POINTER_TYPE *) region_end) |
4577 | { | |
4578 | /* Kernels are free to choose a different address. In | |
4579 | that case, unmap what we've mapped above; we have | |
4580 | no use for it. */ | |
4581 | if (munmap (p, nbytes) == -1) | |
4582 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4583 | } | |
4584 | else | |
4585 | { | |
4586 | r->nbytes_mapped += nbytes; | |
4587 | success = 1; | |
4588 | } | |
4589 | } | |
4590 | } | |
4591 | ||
4592 | return success; | |
4593 | } | |
4594 | ||
4595 | ||
4596 | /* Set or reset variables holding references to mapped regions. If | |
4597 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4598 | non-zero, set all variables to the start of the user-areas | |
4599 | of mapped regions. | |
4600 | ||
4601 | This function is called from Fdump_emacs to ensure that the dumped | |
4602 | Emacs doesn't contain references to memory that won't be mapped | |
4603 | when Emacs starts. */ | |
4604 | ||
4605 | void | |
1dae0f0a | 4606 | mmap_set_vars (int restore_p) |
b86af064 GM |
4607 | { |
4608 | struct mmap_region *r; | |
4609 | ||
4610 | if (restore_p) | |
4611 | { | |
4612 | mmap_regions = mmap_regions_1; | |
4613 | mmap_fd = mmap_fd_1; | |
4614 | for (r = mmap_regions; r; r = r->next) | |
4615 | *r->var = MMAP_USER_AREA (r); | |
4616 | } | |
4617 | else | |
4618 | { | |
4619 | for (r = mmap_regions; r; r = r->next) | |
4620 | *r->var = NULL; | |
4621 | mmap_regions_1 = mmap_regions; | |
4622 | mmap_regions = NULL; | |
4623 | mmap_fd_1 = mmap_fd; | |
4624 | mmap_fd = -1; | |
4625 | } | |
4626 | } | |
4627 | ||
4628 | ||
4629 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4630 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4631 | address of some variable which will use the data area. | |
4632 | ||
4633 | The allocation of 0 bytes is valid. | |
4634 | ||
4635 | If we can't allocate the necessary memory, set *VAR to null, and | |
4636 | return null. */ | |
4637 | ||
4638 | static POINTER_TYPE * | |
1dae0f0a | 4639 | mmap_alloc (POINTER_TYPE **var, size_t nbytes) |
b86af064 GM |
4640 | { |
4641 | void *p; | |
4642 | size_t map; | |
4643 | ||
4644 | mmap_init (); | |
4645 | ||
4646 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4647 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4648 | mmap_fd, 0); | |
177c0ea7 | 4649 | |
b86af064 GM |
4650 | if (p == MAP_FAILED) |
4651 | { | |
4652 | if (errno != ENOMEM) | |
4653 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4654 | p = NULL; | |
4655 | } | |
4656 | else | |
4657 | { | |
4658 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4659 | |
b86af064 GM |
4660 | r->nbytes_specified = nbytes; |
4661 | r->nbytes_mapped = map; | |
4662 | r->var = var; | |
4663 | r->prev = NULL; | |
4664 | r->next = mmap_regions; | |
4665 | if (r->next) | |
4666 | r->next->prev = r; | |
4667 | mmap_regions = r; | |
177c0ea7 | 4668 | |
b86af064 GM |
4669 | p = MMAP_USER_AREA (p); |
4670 | } | |
177c0ea7 | 4671 | |
b86af064 GM |
4672 | return *var = p; |
4673 | } | |
4674 | ||
4675 | ||
1dae0f0a AS |
4676 | /* Free a block of relocatable storage whose data is pointed to by |
4677 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4678 | ||
4679 | static void | |
4680 | mmap_free (POINTER_TYPE **var) | |
4681 | { | |
4682 | mmap_init (); | |
4683 | ||
4684 | if (*var) | |
4685 | { | |
4686 | mmap_free_1 (MMAP_REGION (*var)); | |
4687 | *var = NULL; | |
4688 | } | |
4689 | } | |
4690 | ||
4691 | ||
b86af064 GM |
4692 | /* Given a pointer at address VAR to data allocated with mmap_alloc, |
4693 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4694 | and return this value. If more memory cannot be allocated, then | |
4695 | leave *VAR unchanged, and return null. */ | |
4696 | ||
4697 | static POINTER_TYPE * | |
1dae0f0a | 4698 | mmap_realloc (POINTER_TYPE **var, size_t nbytes) |
b86af064 GM |
4699 | { |
4700 | POINTER_TYPE *result; | |
177c0ea7 | 4701 | |
b86af064 GM |
4702 | mmap_init (); |
4703 | ||
4704 | if (*var == NULL) | |
4705 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4706 | else if (nbytes == 0) |
b86af064 GM |
4707 | { |
4708 | mmap_free (var); | |
4709 | result = mmap_alloc (var, nbytes); | |
4710 | } | |
4711 | else | |
4712 | { | |
4713 | struct mmap_region *r = MMAP_REGION (*var); | |
4714 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4715 | |
b86af064 GM |
4716 | if (room < nbytes) |
4717 | { | |
4718 | /* Must enlarge. */ | |
4719 | POINTER_TYPE *old_ptr = *var; | |
4720 | ||
4721 | /* Try to map additional pages at the end of the region. | |
4722 | If that fails, allocate a new region, copy data | |
4723 | from the old region, then free it. */ | |
4724 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4725 | / mmap_page_size))) | |
4726 | { | |
4727 | r->nbytes_specified = nbytes; | |
4728 | *var = result = old_ptr; | |
4729 | } | |
4730 | else if (mmap_alloc (var, nbytes)) | |
4731 | { | |
72af86bd | 4732 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4733 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4734 | result = *var; | |
4735 | r = MMAP_REGION (result); | |
4736 | r->nbytes_specified = nbytes; | |
4737 | } | |
4738 | else | |
4739 | { | |
4740 | *var = old_ptr; | |
4741 | result = NULL; | |
4742 | } | |
4743 | } | |
4744 | else if (room - nbytes >= mmap_page_size) | |
4745 | { | |
4746 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4747 | memory back to the system. |
4748 | ||
4749 | The extra parens are to make the division happens first, | |
4750 | on positive values, so we know it will round towards | |
4751 | zero. */ | |
bb63c5c9 | 4752 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4753 | result = *var; |
4754 | r->nbytes_specified = nbytes; | |
4755 | } | |
4756 | else | |
4757 | { | |
4758 | /* Leave it alone. */ | |
4759 | result = *var; | |
4760 | r->nbytes_specified = nbytes; | |
4761 | } | |
4762 | } | |
4763 | ||
4764 | return result; | |
4765 | } | |
4766 | ||
4767 | ||
b86af064 GM |
4768 | #endif /* USE_MMAP_FOR_BUFFERS */ |
4769 | ||
4770 | ||
4771 | \f | |
4772 | /*********************************************************************** | |
4773 | Buffer-text Allocation | |
4774 | ***********************************************************************/ | |
4775 | ||
4776 | #ifdef REL_ALLOC | |
f57e2426 J |
4777 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4778 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4779 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4780 | #endif /* REL_ALLOC */ |
4781 | ||
4782 | ||
4783 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4784 | ||
4785 | static void | |
fd05c7e9 | 4786 | alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes) |
b86af064 GM |
4787 | { |
4788 | POINTER_TYPE *p; | |
177c0ea7 | 4789 | |
b86af064 GM |
4790 | BLOCK_INPUT; |
4791 | #if defined USE_MMAP_FOR_BUFFERS | |
4792 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4793 | #elif defined REL_ALLOC | |
4794 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4795 | #else | |
815add84 | 4796 | p = xmalloc (nbytes); |
b86af064 | 4797 | #endif |
177c0ea7 | 4798 | |
b86af064 GM |
4799 | if (p == NULL) |
4800 | { | |
4801 | UNBLOCK_INPUT; | |
531b0165 | 4802 | memory_full (nbytes); |
b86af064 GM |
4803 | } |
4804 | ||
4805 | b->text->beg = (unsigned char *) p; | |
4806 | UNBLOCK_INPUT; | |
4807 | } | |
4808 | ||
4809 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4810 | shrink it. */ | |
4811 | ||
4812 | void | |
5371d722 | 4813 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4814 | { |
4815 | POINTER_TYPE *p; | |
fd05c7e9 PE |
4816 | ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 |
4817 | + delta); | |
b86af064 GM |
4818 | BLOCK_INPUT; |
4819 | #if defined USE_MMAP_FOR_BUFFERS | |
4820 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4821 | #elif defined REL_ALLOC | |
4822 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4823 | #else | |
4824 | p = xrealloc (b->text->beg, nbytes); | |
4825 | #endif | |
177c0ea7 | 4826 | |
b86af064 GM |
4827 | if (p == NULL) |
4828 | { | |
4829 | UNBLOCK_INPUT; | |
531b0165 | 4830 | memory_full (nbytes); |
b86af064 GM |
4831 | } |
4832 | ||
4833 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4834 | UNBLOCK_INPUT; | |
4835 | } | |
4836 | ||
4837 | ||
4838 | /* Free buffer B's text buffer. */ | |
4839 | ||
4840 | static void | |
d3da34e0 | 4841 | free_buffer_text (struct buffer *b) |
b86af064 GM |
4842 | { |
4843 | BLOCK_INPUT; | |
4844 | ||
4845 | #if defined USE_MMAP_FOR_BUFFERS | |
4846 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4847 | #elif defined REL_ALLOC | |
4848 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4849 | #else | |
4850 | xfree (b->text->beg); | |
4851 | #endif | |
177c0ea7 | 4852 | |
b86af064 GM |
4853 | BUF_BEG_ADDR (b) = NULL; |
4854 | UNBLOCK_INPUT; | |
4855 | } | |
4856 | ||
4857 | ||
4858 | \f | |
4859 | /*********************************************************************** | |
4860 | Initialization | |
4861 | ***********************************************************************/ | |
4862 | ||
dfcf069d | 4863 | void |
d3da34e0 | 4864 | init_buffer_once (void) |
1ab256cb | 4865 | { |
7c02e886 GM |
4866 | int idx; |
4867 | ||
72af86bd | 4868 | memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags); |
13de9290 | 4869 | |
1ab256cb RM |
4870 | /* Make sure all markable slots in buffer_defaults |
4871 | are initialized reasonably, so mark_buffer won't choke. */ | |
4872 | reset_buffer (&buffer_defaults); | |
4b4deea2 | 4873 | eassert (EQ (BVAR (&buffer_defaults, name), make_number (0))); |
13de9290 | 4874 | reset_buffer_local_variables (&buffer_defaults, 1); |
4b4deea2 | 4875 | eassert (EQ (BVAR (&buffer_local_symbols, name), make_number (0))); |
1ab256cb | 4876 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4877 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4878 | /* Prevent GC from getting confused. */ |
4879 | buffer_defaults.text = &buffer_defaults.own_text; | |
4880 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4881 | BUF_INTERVALS (&buffer_defaults) = 0; |
4882 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
eab3844f | 4883 | XSETPVECTYPESIZE (&buffer_defaults, PVEC_BUFFER, 0); |
67180c6a | 4884 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
eab3844f | 4885 | XSETPVECTYPESIZE (&buffer_local_symbols, PVEC_BUFFER, 0); |
67180c6a | 4886 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
4887 | |
4888 | /* Set up the default values of various buffer slots. */ | |
4889 | /* Must do these before making the first buffer! */ | |
4890 | ||
f532dca0 | 4891 | /* real setup is done in bindings.el */ |
4b4deea2 TT |
4892 | BVAR (&buffer_defaults, mode_line_format) = make_pure_c_string ("%-"); |
4893 | BVAR (&buffer_defaults, header_line_format) = Qnil; | |
4894 | BVAR (&buffer_defaults, abbrev_mode) = Qnil; | |
4895 | BVAR (&buffer_defaults, overwrite_mode) = Qnil; | |
4896 | BVAR (&buffer_defaults, case_fold_search) = Qt; | |
4897 | BVAR (&buffer_defaults, auto_fill_function) = Qnil; | |
4898 | BVAR (&buffer_defaults, selective_display) = Qnil; | |
1ab256cb | 4899 | #ifndef old |
4b4deea2 | 4900 | BVAR (&buffer_defaults, selective_display_ellipses) = Qt; |
1ab256cb | 4901 | #endif |
4b4deea2 TT |
4902 | BVAR (&buffer_defaults, abbrev_table) = Qnil; |
4903 | BVAR (&buffer_defaults, display_table) = Qnil; | |
4904 | BVAR (&buffer_defaults, undo_list) = Qnil; | |
4905 | BVAR (&buffer_defaults, mark_active) = Qnil; | |
4906 | BVAR (&buffer_defaults, file_format) = Qnil; | |
4907 | BVAR (&buffer_defaults, auto_save_file_format) = Qt; | |
2410d73a SM |
4908 | buffer_defaults.overlays_before = NULL; |
4909 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4910 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4911 | |
4b4deea2 TT |
4912 | XSETFASTINT (BVAR (&buffer_defaults, tab_width), 8); |
4913 | BVAR (&buffer_defaults, truncate_lines) = Qnil; | |
4914 | BVAR (&buffer_defaults, word_wrap) = Qnil; | |
4915 | BVAR (&buffer_defaults, ctl_arrow) = Qt; | |
4cc60b9b | 4916 | BVAR (&buffer_defaults, bidi_display_reordering) = Qt; |
4b4deea2 TT |
4917 | BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil; |
4918 | BVAR (&buffer_defaults, cursor_type) = Qt; | |
4919 | BVAR (&buffer_defaults, extra_line_spacing) = Qnil; | |
4920 | BVAR (&buffer_defaults, cursor_in_non_selected_windows) = Qt; | |
1ab256cb | 4921 | |
4b4deea2 TT |
4922 | BVAR (&buffer_defaults, enable_multibyte_characters) = Qt; |
4923 | BVAR (&buffer_defaults, buffer_file_coding_system) = Qnil; | |
4924 | XSETFASTINT (BVAR (&buffer_defaults, fill_column), 70); | |
4925 | XSETFASTINT (BVAR (&buffer_defaults, left_margin), 0); | |
4926 | BVAR (&buffer_defaults, cache_long_line_scans) = Qnil; | |
4927 | BVAR (&buffer_defaults, file_truename) = Qnil; | |
4928 | XSETFASTINT (BVAR (&buffer_defaults, display_count), 0); | |
4929 | XSETFASTINT (BVAR (&buffer_defaults, left_margin_cols), 0); | |
4930 | XSETFASTINT (BVAR (&buffer_defaults, right_margin_cols), 0); | |
4931 | BVAR (&buffer_defaults, left_fringe_width) = Qnil; | |
4932 | BVAR (&buffer_defaults, right_fringe_width) = Qnil; | |
4933 | BVAR (&buffer_defaults, fringes_outside_margins) = Qnil; | |
4934 | BVAR (&buffer_defaults, scroll_bar_width) = Qnil; | |
4935 | BVAR (&buffer_defaults, vertical_scroll_bar_type) = Qt; | |
4936 | BVAR (&buffer_defaults, indicate_empty_lines) = Qnil; | |
4937 | BVAR (&buffer_defaults, indicate_buffer_boundaries) = Qnil; | |
4938 | BVAR (&buffer_defaults, fringe_indicator_alist) = Qnil; | |
4939 | BVAR (&buffer_defaults, fringe_cursor_alist) = Qnil; | |
4940 | BVAR (&buffer_defaults, scroll_up_aggressively) = Qnil; | |
4941 | BVAR (&buffer_defaults, scroll_down_aggressively) = Qnil; | |
4942 | BVAR (&buffer_defaults, display_time) = Qnil; | |
1ab256cb RM |
4943 | |
4944 | /* Assign the local-flags to the slots that have default values. | |
4945 | The local flag is a bit that is used in the buffer | |
4946 | to say that it has its own local value for the slot. | |
4947 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
4948 | ||
4949 | /* Nothing can work if this isn't true */ | |
d6202519 | 4950 | { verify (sizeof (EMACS_INT) == sizeof (Lisp_Object)); } |
1ab256cb RM |
4951 | |
4952 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 4953 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
4b4deea2 TT |
4954 | XSETINT (BVAR (&buffer_local_flags, filename), -1); |
4955 | XSETINT (BVAR (&buffer_local_flags, directory), -1); | |
4956 | XSETINT (BVAR (&buffer_local_flags, backed_up), -1); | |
4957 | XSETINT (BVAR (&buffer_local_flags, save_length), -1); | |
4958 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_name), -1); | |
4959 | XSETINT (BVAR (&buffer_local_flags, read_only), -1); | |
4960 | XSETINT (BVAR (&buffer_local_flags, major_mode), -1); | |
4961 | XSETINT (BVAR (&buffer_local_flags, mode_name), -1); | |
4962 | XSETINT (BVAR (&buffer_local_flags, undo_list), -1); | |
4963 | XSETINT (BVAR (&buffer_local_flags, mark_active), -1); | |
4964 | XSETINT (BVAR (&buffer_local_flags, point_before_scroll), -1); | |
4965 | XSETINT (BVAR (&buffer_local_flags, file_truename), -1); | |
4966 | XSETINT (BVAR (&buffer_local_flags, invisibility_spec), -1); | |
4967 | XSETINT (BVAR (&buffer_local_flags, file_format), -1); | |
4968 | XSETINT (BVAR (&buffer_local_flags, auto_save_file_format), -1); | |
4969 | XSETINT (BVAR (&buffer_local_flags, display_count), -1); | |
4970 | XSETINT (BVAR (&buffer_local_flags, display_time), -1); | |
4971 | XSETINT (BVAR (&buffer_local_flags, enable_multibyte_characters), -1); | |
8d7a4592 | 4972 | |
7c02e886 | 4973 | idx = 1; |
4b4deea2 TT |
4974 | XSETFASTINT (BVAR (&buffer_local_flags, mode_line_format), idx); ++idx; |
4975 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_mode), idx); ++idx; | |
4976 | XSETFASTINT (BVAR (&buffer_local_flags, overwrite_mode), idx); ++idx; | |
4977 | XSETFASTINT (BVAR (&buffer_local_flags, case_fold_search), idx); ++idx; | |
4978 | XSETFASTINT (BVAR (&buffer_local_flags, auto_fill_function), idx); ++idx; | |
4979 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display), idx); ++idx; | |
1ab256cb | 4980 | #ifndef old |
4b4deea2 | 4981 | XSETFASTINT (BVAR (&buffer_local_flags, selective_display_ellipses), idx); ++idx; |
54ad07d3 | 4982 | #endif |
4b4deea2 TT |
4983 | XSETFASTINT (BVAR (&buffer_local_flags, tab_width), idx); ++idx; |
4984 | XSETFASTINT (BVAR (&buffer_local_flags, truncate_lines), idx); ++idx; | |
4985 | XSETFASTINT (BVAR (&buffer_local_flags, word_wrap), idx); ++idx; | |
4986 | XSETFASTINT (BVAR (&buffer_local_flags, ctl_arrow), idx); ++idx; | |
4987 | XSETFASTINT (BVAR (&buffer_local_flags, fill_column), idx); ++idx; | |
4988 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin), idx); ++idx; | |
4989 | XSETFASTINT (BVAR (&buffer_local_flags, abbrev_table), idx); ++idx; | |
4990 | XSETFASTINT (BVAR (&buffer_local_flags, display_table), idx); ++idx; | |
4b4deea2 TT |
4991 | XSETFASTINT (BVAR (&buffer_local_flags, syntax_table), idx); ++idx; |
4992 | XSETFASTINT (BVAR (&buffer_local_flags, cache_long_line_scans), idx); ++idx; | |
4993 | XSETFASTINT (BVAR (&buffer_local_flags, category_table), idx); ++idx; | |
4994 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_display_reordering), idx); ++idx; | |
4995 | XSETFASTINT (BVAR (&buffer_local_flags, bidi_paragraph_direction), idx); ++idx; | |
4996 | XSETFASTINT (BVAR (&buffer_local_flags, buffer_file_coding_system), idx); | |
a1a17b61 | 4997 | /* Make this one a permanent local. */ |
7c02e886 | 4998 | buffer_permanent_local_flags[idx++] = 1; |
4b4deea2 TT |
4999 | XSETFASTINT (BVAR (&buffer_local_flags, left_margin_cols), idx); ++idx; |
5000 | XSETFASTINT (BVAR (&buffer_local_flags, right_margin_cols), idx); ++idx; | |
5001 | XSETFASTINT (BVAR (&buffer_local_flags, left_fringe_width), idx); ++idx; | |
5002 | XSETFASTINT (BVAR (&buffer_local_flags, right_fringe_width), idx); ++idx; | |
5003 | XSETFASTINT (BVAR (&buffer_local_flags, fringes_outside_margins), idx); ++idx; | |
5004 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_bar_width), idx); ++idx; | |
5005 | XSETFASTINT (BVAR (&buffer_local_flags, vertical_scroll_bar_type), idx); ++idx; | |
5006 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_empty_lines), idx); ++idx; | |
5007 | XSETFASTINT (BVAR (&buffer_local_flags, indicate_buffer_boundaries), idx); ++idx; | |
5008 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_indicator_alist), idx); ++idx; | |
5009 | XSETFASTINT (BVAR (&buffer_local_flags, fringe_cursor_alist), idx); ++idx; | |
5010 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_up_aggressively), idx); ++idx; | |
5011 | XSETFASTINT (BVAR (&buffer_local_flags, scroll_down_aggressively), idx); ++idx; | |
5012 | XSETFASTINT (BVAR (&buffer_local_flags, header_line_format), idx); ++idx; | |
5013 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_type), idx); ++idx; | |
5014 | XSETFASTINT (BVAR (&buffer_local_flags, extra_line_spacing), idx); ++idx; | |
5015 | XSETFASTINT (BVAR (&buffer_local_flags, cursor_in_non_selected_windows), idx); ++idx; | |
7c02e886 GM |
5016 | |
5017 | /* Need more room? */ | |
7313acd0 | 5018 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5019 | abort (); |
7313acd0 | 5020 | last_per_buffer_idx = idx; |
177c0ea7 | 5021 | |
1ab256cb RM |
5022 | Vbuffer_alist = Qnil; |
5023 | current_buffer = 0; | |
5024 | all_buffers = 0; | |
5025 | ||
f4265f6c | 5026 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5027 | |
d67b4f80 | 5028 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
4b4deea2 | 5029 | BVAR (&buffer_defaults, major_mode) = Qfundamental_mode; |
1ab256cb | 5030 | |
d67b4f80 | 5031 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5032 | |
d67b4f80 | 5033 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5034 | |
d67b4f80 | 5035 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5036 | |
d67b4f80 | 5037 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5038 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5039 | |
d67b4f80 | 5040 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5041 | |
1ab256cb | 5042 | /* super-magic invisible buffer */ |
d67b4f80 | 5043 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5044 | Vbuffer_alist = Qnil; |
5045 | ||
d67b4f80 | 5046 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5047 | |
5048 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5049 | } |
5050 | ||
dfcf069d | 5051 | void |
d3da34e0 | 5052 | init_buffer (void) |
1ab256cb | 5053 | { |
2381d133 | 5054 | char *pwd; |
136351b7 | 5055 | Lisp_Object temp; |
965d34eb | 5056 | ptrdiff_t len; |
1ab256cb | 5057 | |
b86af064 | 5058 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5059 | { |
5060 | /* When using the ralloc implementation based on mmap(2), buffer | |
5061 | text pointers will have been set to null in the dumped Emacs. | |
5062 | Map new memory. */ | |
5063 | struct buffer *b; | |
177c0ea7 | 5064 | |
f61f41d7 | 5065 | for (b = all_buffers; b; b = b->header.next.buffer) |
93c27ef1 | 5066 | if (b->text->beg == NULL) |
b86af064 | 5067 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5068 | } |
b86af064 | 5069 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5070 | |
1ab256cb | 5071 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
4b4deea2 | 5072 | if (NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) |
3d871c85 | 5073 | Fset_buffer_multibyte (Qnil); |
2381d133 | 5074 | |
01537133 | 5075 | pwd = get_current_dir_name (); |
a17b5ed1 | 5076 | |
156bdb41 | 5077 | if (!pwd) |
a17b5ed1 | 5078 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5079 | |
1ab256cb RM |
5080 | /* Maybe this should really use some standard subroutine |
5081 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5082 | len = strlen (pwd); |
5083 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5084 | { |
156bdb41 | 5085 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5086 | pwd = (char *) realloc (pwd, len + 2); |
5087 | if (!pwd) | |
5088 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5089 | pwd[len] = DIRECTORY_SEP; |
5090 | pwd[len + 1] = '\0'; | |
f7975d07 | 5091 | } |
0995fa35 | 5092 | |
4b4deea2 TT |
5093 | BVAR (current_buffer, directory) = make_unibyte_string (pwd, strlen (pwd)); |
5094 | if (! NILP (BVAR (&buffer_defaults, enable_multibyte_characters))) | |
f9962371 | 5095 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5096 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f | 5097 | that ENCODE_FILE correctly gets the original bytes. */ |
4b4deea2 TT |
5098 | BVAR (current_buffer, directory) |
5099 | = string_to_multibyte (BVAR (current_buffer, directory)); | |
136351b7 | 5100 | |
0995fa35 RS |
5101 | /* Add /: to the front of the name |
5102 | if it would otherwise be treated as magic. */ | |
4b4deea2 | 5103 | temp = Ffind_file_name_handler (BVAR (current_buffer, directory), Qt); |
81ab2e07 KH |
5104 | if (! NILP (temp) |
5105 | /* If the default dir is just /, TEMP is non-nil | |
5106 | because of the ange-ftp completion handler. | |
5107 | However, it is not necessary to turn / into /:/. | |
5108 | So avoid doing that. */ | |
4b4deea2 TT |
5109 | && strcmp ("/", SSDATA (BVAR (current_buffer, directory)))) |
5110 | BVAR (current_buffer, directory) | |
5111 | = concat2 (build_string ("/:"), BVAR (current_buffer, directory)); | |
0995fa35 | 5112 | |
136351b7 | 5113 | temp = get_minibuffer (0); |
4b4deea2 | 5114 | BVAR (XBUFFER (temp), directory) = BVAR (current_buffer, directory); |
01537133 EZ |
5115 | |
5116 | free (pwd); | |
1ab256cb RM |
5117 | } |
5118 | ||
d6aa1876 SM |
5119 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5120 | Object stored in the current buffer. address is the address of the slot | |
5121 | in the buffer that is current now. */ | |
5122 | ||
5123 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5124 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5125 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5126 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5127 | VNAME is the name of the buffer slot. |
5128 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5129 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5130 | do { \ | |
5131 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
6b1f9ba4 | 5132 | defvar_per_buffer (&bo_fwd, lname, vname, type); \ |
ce5b453a | 5133 | } while (0) |
d6aa1876 SM |
5134 | |
5135 | static void | |
8ea90aa3 | 5136 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, const char *namestring, |
6b1f9ba4 | 5137 | Lisp_Object *address, Lisp_Object type) |
d6aa1876 | 5138 | { |
ce5b453a | 5139 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5140 | int offset; |
5141 | ||
ce5b453a | 5142 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5143 | offset = (char *)address - (char *)current_buffer; |
5144 | ||
ce5b453a SM |
5145 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5146 | bo_fwd->offset = offset; | |
5147 | bo_fwd->slottype = type; | |
b9598260 | 5148 | sym->declared_special = 1; |
ce5b453a SM |
5149 | sym->redirect = SYMBOL_FORWARDED; |
5150 | { | |
5151 | /* I tried to do the job without a cast, but it seems impossible. | |
5152 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5153 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5154 | } | |
5155 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5156 | |
5157 | if (PER_BUFFER_IDX (offset) == 0) | |
5158 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5159 | slot of buffer_local_flags */ | |
5160 | abort (); | |
5161 | } | |
5162 | ||
5163 | ||
1ab256cb | 5164 | /* initialize the buffer routines */ |
dfcf069d | 5165 | void |
d3da34e0 | 5166 | syms_of_buffer (void) |
1ab256cb | 5167 | { |
9115729e KH |
5168 | staticpro (&last_overlay_modification_hooks); |
5169 | last_overlay_modification_hooks | |
5170 | = Fmake_vector (make_number (10), Qnil); | |
5171 | ||
1ab256cb RM |
5172 | staticpro (&Vbuffer_defaults); |
5173 | staticpro (&Vbuffer_local_symbols); | |
5174 | staticpro (&Qfundamental_mode); | |
5175 | staticpro (&Qmode_class); | |
5176 | staticpro (&QSFundamental); | |
5177 | staticpro (&Vbuffer_alist); | |
5178 | staticpro (&Qprotected_field); | |
5179 | staticpro (&Qpermanent_local); | |
5180 | staticpro (&Qkill_buffer_hook); | |
cd3520a4 JB |
5181 | |
5182 | DEFSYM (Qpermanent_local_hook, "permanent-local-hook"); | |
5183 | DEFSYM (Qoverlayp, "overlayp"); | |
5184 | DEFSYM (Qevaporate, "evaporate"); | |
5185 | DEFSYM (Qmodification_hooks, "modification-hooks"); | |
5186 | DEFSYM (Qinsert_in_front_hooks, "insert-in-front-hooks"); | |
5187 | DEFSYM (Qinsert_behind_hooks, "insert-behind-hooks"); | |
5188 | DEFSYM (Qget_file_buffer, "get-file-buffer"); | |
5189 | DEFSYM (Qpriority, "priority"); | |
5190 | DEFSYM (Qbefore_string, "before-string"); | |
5191 | DEFSYM (Qafter_string, "after-string"); | |
5192 | DEFSYM (Qfirst_change_hook, "first-change-hook"); | |
5193 | DEFSYM (Qbefore_change_functions, "before-change-functions"); | |
5194 | DEFSYM (Qafter_change_functions, "after-change-functions"); | |
5195 | DEFSYM (Qkill_buffer_query_functions, "kill-buffer-query-functions"); | |
5196 | ||
2f7a359d | 5197 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5198 | staticpro (&Qucs_set_table_for_input); |
1ab256cb RM |
5199 | |
5200 | Fput (Qprotected_field, Qerror_conditions, | |
d67b4f80 | 5201 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5202 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5203 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb | 5204 | |
422745d0 TT |
5205 | DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format", |
5206 | mode_line_format, | |
5207 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5208 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5209 | |
422745d0 TT |
5210 | DEFVAR_BUFFER_DEFAULTS ("default-header-line-format", |
5211 | header_line_format, | |
5212 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5213 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5214 | |
422745d0 TT |
5215 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type, |
5216 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5217 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5218 | |
422745d0 TT |
5219 | DEFVAR_BUFFER_DEFAULTS ("default-line-spacing", |
5220 | extra_line_spacing, | |
5221 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5222 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5223 | |
422745d0 TT |
5224 | DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows", |
5225 | cursor_in_non_selected_windows, | |
5226 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
187ccf49 KS |
5227 | This is the same as (default-value 'cursor-in-non-selected-windows). */); |
5228 | ||
422745d0 TT |
5229 | DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", |
5230 | abbrev_mode, | |
5231 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. | |
018ba359 | 5232 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb | 5233 | |
422745d0 TT |
5234 | DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", |
5235 | ctl_arrow, | |
5236 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. | |
018ba359 | 5237 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5238 | |
422745d0 TT |
5239 | DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters", |
5240 | enable_multibyte_characters, | |
5241 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5242 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5243 | |
422745d0 TT |
5244 | DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", |
5245 | buffer_file_coding_system, | |
5246 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5247 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5248 | |
422745d0 TT |
5249 | DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", |
5250 | truncate_lines, | |
5251 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5252 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb | 5253 | |
422745d0 TT |
5254 | DEFVAR_BUFFER_DEFAULTS ("default-fill-column", |
5255 | fill_column, | |
5256 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5257 | This is the same as (default-value 'fill-column). */); |
1ab256cb | 5258 | |
422745d0 TT |
5259 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin", |
5260 | left_margin, | |
5261 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5262 | This is the same as (default-value 'left-margin). */); |
1ab256cb | 5263 | |
422745d0 TT |
5264 | DEFVAR_BUFFER_DEFAULTS ("default-tab-width", |
5265 | tab_width, | |
5266 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5267 | This is the same as (default-value 'tab-width). */); |
1ab256cb | 5268 | |
422745d0 TT |
5269 | DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", |
5270 | case_fold_search, | |
5271 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5272 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5273 | |
422745d0 TT |
5274 | DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width", |
5275 | left_margin_cols, | |
5276 | doc: /* Default value of `left-margin-width' for buffers that don't override it. | |
018ba359 | 5277 | This is the same as (default-value 'left-margin-width). */); |
0552666b | 5278 | |
422745d0 TT |
5279 | DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width", |
5280 | right_margin_cols, | |
5281 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5282 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5283 | |
422745d0 TT |
5284 | DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width", |
5285 | left_fringe_width, | |
5286 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5287 | This is the same as (default-value 'left-fringe-width). */); |
5288 | ||
422745d0 TT |
5289 | DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width", |
5290 | right_fringe_width, | |
5291 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
2ad8731a KS |
5292 | This is the same as (default-value 'right-fringe-width). */); |
5293 | ||
422745d0 TT |
5294 | DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins", |
5295 | fringes_outside_margins, | |
5296 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
2ad8731a KS |
5297 | This is the same as (default-value 'fringes-outside-margins). */); |
5298 | ||
422745d0 TT |
5299 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width", |
5300 | scroll_bar_width, | |
5301 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
2ad8731a KS |
5302 | This is the same as (default-value 'scroll-bar-width). */); |
5303 | ||
422745d0 TT |
5304 | DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar", |
5305 | vertical_scroll_bar_type, | |
5306 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
2ad8731a KS |
5307 | This is the same as (default-value 'vertical-scroll-bar). */); |
5308 | ||
422745d0 TT |
5309 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines", |
5310 | indicate_empty_lines, | |
5311 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5312 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5313 | |
422745d0 TT |
5314 | DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries", |
5315 | indicate_buffer_boundaries, | |
5316 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
6b61353c KH |
5317 | This is the same as (default-value 'indicate-buffer-boundaries). */); |
5318 | ||
422745d0 TT |
5319 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist", |
5320 | fringe_indicator_alist, | |
5321 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
c6a46372 KS |
5322 | This is the same as (default-value 'fringe-indicator-alist'). */); |
5323 | ||
422745d0 TT |
5324 | DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist", |
5325 | fringe_cursor_alist, | |
5326 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
c6a46372 KS |
5327 | This is the same as (default-value 'fringe-cursor-alist'). */); |
5328 | ||
422745d0 TT |
5329 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively", |
5330 | scroll_up_aggressively, | |
5331 | doc: /* Default value of `scroll-up-aggressively'. | |
7614d762 | 5332 | This value applies in buffers that don't have their own local values. |
fc961256 | 5333 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5334 | |
422745d0 TT |
5335 | DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively", |
5336 | scroll_down_aggressively, | |
5337 | doc: /* Default value of `scroll-down-aggressively'. | |
7614d762 | 5338 | This value applies in buffers that don't have their own local values. |
fc961256 | 5339 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5340 | |
045dee35 | 5341 | DEFVAR_PER_BUFFER ("header-line-format", |
4b4deea2 | 5342 | &BVAR (current_buffer, header_line_format), |
7ee72033 | 5343 | Qnil, |
7614d762 RS |
5344 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5345 | The header line appears, optionally, at the top of a window; | |
5346 | the mode line appears at the bottom. */); | |
177c0ea7 | 5347 | |
4b4deea2 | 5348 | DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer, mode_line_format), |
efc7e75f PJ |
5349 | Qnil, |
5350 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5351 | Each buffer has its own value of this variable. |
5352 | Value may be nil, a string, a symbol or a list or cons cell. | |
5353 | A value of nil means don't display a mode line. | |
5354 | For a symbol, its value is used (but it is ignored if t or nil). | |
5355 | A string appearing directly as the value of a symbol is processed verbatim | |
5356 | in that the %-constructs below are not recognized. | |
ed463255 | 5357 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5358 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5359 | in the value of that symbol will be ignored. |
018ba359 | 5360 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5361 | is used as a mode line element. Be careful--FORM should not load any files, |
5362 | because that can cause an infinite recursion. | |
ed463255 KS |
5363 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5364 | with the specified properties PROPS applied. | |
018ba359 PJ |
5365 | For a list whose car is a symbol, the symbol's value is taken, |
5366 | and if that is non-nil, the cadr of the list is processed recursively. | |
5367 | Otherwise, the caddr of the list (if there is one) is processed. | |
5368 | For a list whose car is a string or list, each element is processed | |
5369 | recursively and the results are effectively concatenated. | |
5370 | For a list whose car is an integer, the cdr of the list is processed | |
5371 | and padded (if the number is positive) or truncated (if negative) | |
5372 | to the width specified by that number. | |
5373 | A string is printed verbatim in the mode line except for %-constructs: | |
5374 | (%-constructs are allowed when the string is the entire mode-line-format | |
5375 | or when it is found in a cons-cell or a list) | |
5376 | %b -- print buffer name. %f -- print visited file name. | |
5377 | %F -- print frame name. | |
5378 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5379 | %& is like %*, but ignore read-only-ness. | |
5380 | % means buffer is read-only and * means it is modified. | |
5381 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5382 | %s -- print process status. %l -- print the current line number. | |
5383 | %c -- print the current column number (this makes editing slower). | |
5384 | To make the column number update correctly in all cases, | |
5385 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5386 | %i -- print the size of the buffer. |
5387 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5388 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5389 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5390 | or print Bottom or All. | |
018ba359 | 5391 | %n -- print Narrow if appropriate. |
dafbe726 | 5392 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5393 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5394 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5395 | %e -- print error message about full memory. |
f7165034 NR |
5396 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5397 | remote machine. | |
018ba359 PJ |
5398 | %[ -- print one [ for each recursive editing level. %] similar. |
5399 | %% -- print %. %- -- print infinitely many dashes. | |
5400 | Decimal digits after the % specify field width to which to pad. */); | |
5401 | ||
422745d0 TT |
5402 | DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode, |
5403 | doc: /* *Value of `major-mode' for new buffers. */); | |
1ab256cb | 5404 | |
4b4deea2 | 5405 | DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer, major_mode), |
7ee72033 | 5406 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5407 | doc: /* Symbol for current buffer's major mode. |
5408 | The default value (normally `fundamental-mode') affects new buffers. | |
5409 | A value of nil means to use the current buffer's major mode, provided | |
5410 | it is not marked as "special". | |
5411 | ||
5412 | When a mode is used by default, `find-file' switches to it before it | |
5413 | reads the contents into the buffer and before it finishes setting up | |
5414 | the buffer. Thus, the mode and its hooks should not expect certain | |
5415 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5416 | to be set up. */); | |
1ab256cb | 5417 | |
4b4deea2 | 5418 | DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer, mode_name), |
c01d0677 | 5419 | Qnil, |
64a7c220 | 5420 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5421 | Usually a string, but can use any of the constructs for `mode-line-format', |
5422 | which see. | |
5423 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5424 | |
4b4deea2 | 5425 | DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer, abbrev_table), Qnil, |
d6aa1876 SM |
5426 | doc: /* Local (mode-specific) abbrev table of current buffer. */); |
5427 | ||
4b4deea2 | 5428 | DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer, abbrev_mode), Qnil, |
9d794026 GM |
5429 | doc: /* Non-nil if Abbrev mode is enabled. |
5430 | Use the command `abbrev-mode' to change this variable. */); | |
1ab256cb | 5431 | |
4b4deea2 | 5432 | DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer, case_fold_search), |
7ee72033 | 5433 | Qnil, |
efc7e75f | 5434 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb | 5435 | |
4b4deea2 | 5436 | DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer, fill_column), |
2de9f71c | 5437 | make_number (LISP_INT_TAG), |
1ac5826d | 5438 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5439 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb | 5440 | |
4b4deea2 | 5441 | DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer, left_margin), |
2de9f71c | 5442 | make_number (LISP_INT_TAG), |
fc961256 | 5443 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5444 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb | 5445 | |
4b4deea2 | 5446 | DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer, tab_width), |
2de9f71c | 5447 | make_number (LISP_INT_TAG), |
fde4eb86 CY |
5448 | doc: /* *Distance between tab stops (for display of tab characters), in columns. |
5449 | This should be an integer greater than zero. */); | |
1ab256cb | 5450 | |
4b4deea2 | 5451 | DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer, ctl_arrow), Qnil, |
efc7e75f | 5452 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5453 | A value of nil means use backslash and octal digits. |
5454 | This variable does not apply to characters whose display is specified | |
5455 | in the current display table (if there is one). */); | |
1ab256cb | 5456 | |
3b06f880 | 5457 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
4b4deea2 | 5458 | &BVAR (current_buffer, enable_multibyte_characters), |
a9b9a780 | 5459 | Qnil, |
efc7e75f | 5460 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5461 | Otherwise they are regarded as unibyte. This affects the display, |
5462 | file I/O and the behavior of various editing commands. | |
5463 | ||
5464 | This variable is buffer-local but you cannot set it directly; | |
5465 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
a66cfb1c | 5466 | See also Info node `(elisp)Text Representations'. */); |
d67b4f80 | 5467 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5468 | |
c71b5d9b | 5469 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
4b4deea2 | 5470 | &BVAR (current_buffer, buffer_file_coding_system), Qnil, |
efc7e75f | 5471 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5472 | This variable applies to saving the buffer, and also to `write-region' |
5473 | and other functions that use `write-region'. | |
5474 | It does not apply to sending output to subprocesses, however. | |
5475 | ||
5476 | If this is nil, the buffer is saved without any code conversion | |
5477 | unless some coding system is specified in `file-coding-system-alist' | |
5478 | for the buffer file. | |
5479 | ||
31a6cb06 EZ |
5480 | If the text to be saved cannot be encoded as specified by this variable, |
5481 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5482 | ||
018ba359 PJ |
5483 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5484 | ||
5485 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5486 | |
f44e260c | 5487 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
4b4deea2 | 5488 | &BVAR (current_buffer, bidi_display_reordering), Qnil, |
938efb77 | 5489 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5490 | |
6c0cf218 | 5491 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
4b4deea2 | 5492 | &BVAR (current_buffer, bidi_paragraph_direction), Qnil, |
b44d9321 | 5493 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5494 | |
b44d9321 EZ |
5495 | If this is nil (the default), the direction of each paragraph is |
5496 | determined by the first strong directional character of its text. | |
5497 | The values of `right-to-left' and `left-to-right' override that. | |
5498 | Any other value is treated as nil. | |
b4bf28b7 | 5499 | |
b44d9321 EZ |
5500 | This variable has no effect unless the buffer's value of |
5501 | \`bidi-display-reordering' is non-nil. */); | |
5502 | ||
4b4deea2 | 5503 | DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer, truncate_lines), Qnil, |
7614d762 RS |
5504 | doc: /* *Non-nil means do not display continuation lines. |
5505 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5506 | |
5507 | Note that this is overridden by the variable | |
5508 | `truncate-partial-width-windows' if that variable is non-nil | |
32bbb17c GM |
5509 | and this buffer is not full-frame width. |
5510 | ||
5511 | Minibuffers set this variable to nil. */); | |
1ab256cb | 5512 | |
4b4deea2 | 5513 | DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil, |
0858cd02 CY |
5514 | doc: /* *Non-nil means to use word-wrapping for continuation lines. |
5515 | When word-wrapping is on, continuation lines are wrapped at the space | |
5516 | or tab character nearest to the right window edge. | |
5517 | If nil, continuation lines are wrapped at the right screen edge. | |
5518 | ||
5519 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5520 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5521 | word-wrapping, you might want to reduce the value of | |
5522 | `truncate-partial-width-windows', since wrapping can make text readable | |
5523 | in narrower windows. */); | |
0858cd02 | 5524 | |
4b4deea2 | 5525 | DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer, directory), |
7ee72033 | 5526 | make_number (Lisp_String), |
efc7e75f | 5527 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5528 | To interactively change the default directory, use command `cd'. */); |
1ab256cb | 5529 | |
4b4deea2 | 5530 | DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer, auto_fill_function), |
7ee72033 | 5531 | Qnil, |
efc7e75f | 5532 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5533 | It is called after self-inserting any character specified in |
5534 | the `auto-fill-chars' table. | |
5535 | NOTE: This variable is not a hook; | |
5536 | its value may not be a list of functions. */); | |
1ab256cb | 5537 | |
4b4deea2 | 5538 | DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer, filename), |
7ee72033 | 5539 | make_number (Lisp_String), |
efc7e75f | 5540 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5541 | |
4b4deea2 | 5542 | DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer, file_truename), |
7ee72033 | 5543 | make_number (Lisp_String), |
efc7e75f | 5544 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5545 | The truename of a file is calculated by `file-truename' |
5546 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5547 | |
1ab256cb | 5548 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
4b4deea2 | 5549 | &BVAR (current_buffer, auto_save_file_name), |
7ee72033 | 5550 | make_number (Lisp_String), |
7614d762 RS |
5551 | doc: /* Name of file for auto-saving current buffer. |
5552 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5553 | |
4b4deea2 | 5554 | DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer, read_only), Qnil, |
efc7e75f | 5555 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5556 | |
4b4deea2 | 5557 | DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer, backed_up), Qnil, |
efc7e75f | 5558 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5559 | Backing up is done before the first time the file is saved. */); |
1ab256cb | 5560 | |
4b4deea2 | 5561 | DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer, save_length), |
2de9f71c | 5562 | make_number (LISP_INT_TAG), |
efc7e75f | 5563 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5564 | 0 initially. |
5565 | -1 means auto-saving turned off until next real save. | |
5566 | ||
5567 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5568 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5569 | you probably should set this to -2 in that buffer. */); | |
1ab256cb | 5570 | |
4b4deea2 | 5571 | DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer, selective_display), |
7ee72033 | 5572 | Qnil, |
7614d762 | 5573 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5574 | An integer N as value means display only lines |
5575 | that start with less than N columns of space. | |
7614d762 RS |
5576 | A value of t means that the character ^M makes itself and |
5577 | all the rest of the line invisible; also, when saving the buffer | |
5578 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5579 | |
5580 | #ifndef old | |
5581 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
4b4deea2 | 5582 | &BVAR (current_buffer, selective_display_ellipses), |
7ee72033 | 5583 | Qnil, |
3f676284 | 5584 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5585 | #endif |
5586 | ||
4b4deea2 | 5587 | DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer, overwrite_mode), Qnil, |
efc7e75f | 5588 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5589 | The value should be one of `overwrite-mode-textual', |
5590 | `overwrite-mode-binary', or nil. | |
5591 | If it is `overwrite-mode-textual', self-insertion still | |
5592 | inserts at the end of a line, and inserts when point is before a tab, | |
5593 | until the tab is filled in. | |
5594 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5595 | ||
4b4deea2 | 5596 | DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer, display_table), |
7ee72033 | 5597 | Qnil, |
efc7e75f | 5598 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5599 | |
5600 | If this variable is nil, the value of `standard-display-table' is used. | |
5601 | Each window can have its own, overriding display table, see | |
5602 | `set-window-display-table' and `window-display-table'. | |
5603 | ||
5604 | The display table is a char-table created with `make-display-table'. | |
5605 | A char-table is an array indexed by character codes. Normal array | |
5606 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5607 | ||
5608 | Each of the char-table elements control how to display the corresponding | |
5609 | text character: the element at index C in the table says how to display | |
5610 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5611 | characters or nil. The value nil means display the character in the |
5612 | default fashion; otherwise, the characters from the vector are delivered | |
5613 | to the screen instead of the original character. | |
018ba359 | 5614 | |
5fd11dc8 | 5615 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5616 | to display a capital Y instead of each X character. |
018ba359 PJ |
5617 | |
5618 | In addition, a char-table has six extra slots to control the display of: | |
5619 | ||
5620 | the end of a truncated screen line (extra-slot 0, a single character); | |
5621 | the end of a continued line (extra-slot 1, a single character); | |
5622 | the escape character used to display character codes in octal | |
5623 | (extra-slot 2, a single character); | |
5624 | the character used as an arrow for control characters (extra-slot 3, | |
5625 | a single character); | |
5626 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5627 | a vector of characters); | |
5628 | the character used to draw the border between side-by-side windows | |
5629 | (extra-slot 5, a single character). | |
5630 | ||
5631 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5632 | |
4b4deea2 | 5633 | DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer, left_margin_cols), |
7ee72033 | 5634 | Qnil, |
efc7e75f | 5635 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5636 | A value of nil means no marginal area. */); |
177c0ea7 | 5637 | |
4b4deea2 | 5638 | DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer, right_margin_cols), |
7ee72033 | 5639 | Qnil, |
efc7e75f | 5640 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5641 | A value of nil means no marginal area. */); |
177c0ea7 | 5642 | |
4b4deea2 | 5643 | DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer, left_fringe_width), |
2ad8731a KS |
5644 | Qnil, |
5645 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5646 | A value of 0 means no left fringe is shown in this buffer's window. | |
5647 | A value of nil means to use the left fringe width from the window's frame. */); | |
5648 | ||
4b4deea2 | 5649 | DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer, right_fringe_width), |
2ad8731a KS |
5650 | Qnil, |
5651 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5652 | A value of 0 means no right fringe is shown in this buffer's window. | |
5653 | A value of nil means to use the right fringe width from the window's frame. */); | |
5654 | ||
4b4deea2 | 5655 | DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer, fringes_outside_margins), |
2ad8731a KS |
5656 | Qnil, |
5657 | doc: /* *Non-nil means to display fringes outside display margins. | |
5658 | A value of nil means to display fringes between margins and buffer text. */); | |
5659 | ||
4b4deea2 | 5660 | DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer, scroll_bar_width), |
2ad8731a KS |
5661 | Qnil, |
5662 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5663 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5664 | ||
4b4deea2 | 5665 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer, vertical_scroll_bar_type), |
2ad8731a KS |
5666 | Qnil, |
5667 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5668 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5669 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5670 | |
fc2c8887 RS |
5671 | A value of `left' or `right' means put the vertical scroll bar at that side |
5672 | of the window; a value of nil means don't show any vertical scroll bars. | |
5673 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5674 | |
0552666b | 5675 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
4b4deea2 | 5676 | &BVAR (current_buffer, indicate_empty_lines), Qnil, |
efc7e75f | 5677 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5678 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5679 | window-systems. */); | |
177c0ea7 | 5680 | |
6b61353c | 5681 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
4b4deea2 | 5682 | &BVAR (current_buffer, indicate_buffer_boundaries), Qnil, |
6b61353c KH |
5683 | doc: /* *Visually indicate buffer boundaries and scrolling. |
5684 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5685 | of a window on window-systems with angle bitmaps, or if the window can be | |
5686 | scrolled, the top and bottom line of the window are marked with up and down | |
5687 | arrow bitmaps. | |
b2229037 KS |
5688 | |
5689 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5690 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5691 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5692 | the left fringe but no arrows. |
b2229037 | 5693 | |
79e3497d RS |
5694 | You can exercise more precise control by using an alist as the |
5695 | value. Each alist element (INDICATOR . POSITION) specifies | |
5696 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5697 | `bottom', `up', `down', or t, which specifies the default position, |
5698 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5699 | this indicator. | |
5700 | ||
5701 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5702 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5703 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5704 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5705 | |
c6a46372 | 5706 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
4b4deea2 | 5707 | &BVAR (current_buffer, fringe_indicator_alist), Qnil, |
c6a46372 KS |
5708 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. |
5709 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5710 | specifies the fringe bitmaps used to display a specific logical | |
5711 | fringe indicator. | |
5712 | ||
5713 | INDICATOR specifies the logical indicator type which is one of the | |
5714 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5715 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5716 | |
14fb5704 | 5717 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5718 | the actual bitmap shown in the left or right fringe for the logical |
5719 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5720 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5721 | are used only for the `bottom' and `top-bottom' indicators when the |
5722 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5723 | symbol which is used in both left and right fringes. */); |
5724 | ||
5725 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
4b4deea2 | 5726 | &BVAR (current_buffer, fringe_cursor_alist), Qnil, |
c6a46372 KS |
5727 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. |
5728 | The value is an alist where each element (CURSOR . BITMAP) | |
5729 | specifies the fringe bitmaps used to display a specific logical | |
5730 | cursor type in the fringe. | |
5731 | ||
5732 | CURSOR specifies the logical cursor type which is one of the following | |
5733 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5734 | one is used to show a hollow cursor on narrow lines display lines | |
5735 | where the normal hollow cursor will not fit. | |
5736 | ||
5737 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5738 | cursor type. */); | |
5739 | ||
0552666b | 5740 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
4b4deea2 | 5741 | &BVAR (current_buffer, scroll_up_aggressively), Qnil, |
4e0692c1 RS |
5742 | doc: /* How far to scroll windows upward. |
5743 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5744 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5745 | means scroll to center point. A fraction means scroll to put point |
5746 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5747 | When the value is 0.0, point goes at the bottom line, which in the |
5748 | simple case that you moved off with C-f means scrolling just one line. | |
5749 | 1.0 means point goes at the top, so that in that simple case, the | |
5750 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5751 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5752 | |
0552666b | 5753 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
4b4deea2 | 5754 | &BVAR (current_buffer, scroll_down_aggressively), Qnil, |
4e0692c1 RS |
5755 | doc: /* How far to scroll windows downward. |
5756 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5757 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5758 | means scroll to center point. A fraction means scroll to put point |
5759 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5760 | When the value is 0.0, point goes at the top line, which in the |
5761 | simple case that you moved off with C-b means scrolling just one line. | |
5762 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5763 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5764 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5765 | |
1ab256cb RM |
5766 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5767 | "Don't ask."); | |
5768 | */ | |
1ab256cb | 5769 | |
29208e82 | 5770 | DEFVAR_LISP ("before-change-functions", Vbefore_change_functions, |
7ee72033 | 5771 | doc: /* List of functions to call before each text change. |
018ba359 PJ |
5772 | Two arguments are passed to each function: the positions of |
5773 | the beginning and end of the range of old text to be changed. | |
5774 | \(For an insertion, the beginning and end are at the same place.) | |
5775 | No information is given about the length of the text after the change. | |
5776 | ||
5777 | Buffer changes made while executing the `before-change-functions' | |
5778 | don't call any before-change or after-change functions. | |
7b2bf907 | 5779 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5780 | |
5781 | If an unhandled error happens in running these functions, | |
5782 | the variable's value remains nil. That prevents the error | |
5783 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5784 | Vbefore_change_functions = Qnil; |
5785 | ||
29208e82 | 5786 | DEFVAR_LISP ("after-change-functions", Vafter_change_functions, |
eacdfade | 5787 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5788 | Three arguments are passed to each function: the positions of |
5789 | the beginning and end of the range of changed text, | |
5790 | and the length in bytes of the pre-change text replaced by that range. | |
5791 | \(For an insertion, the pre-change length is zero; | |
5792 | for a deletion, that length is the number of bytes deleted, | |
5793 | and the post-change beginning and end are at the same place.) | |
5794 | ||
5795 | Buffer changes made while executing the `after-change-functions' | |
5796 | don't call any before-change or after-change functions. | |
7b2bf907 | 5797 | That's because `inhibit-modification-hooks' is temporarily set non-nil. |
018ba359 PJ |
5798 | |
5799 | If an unhandled error happens in running these functions, | |
5800 | the variable's value remains nil. That prevents the error | |
5801 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5802 | Vafter_change_functions = Qnil; |
5803 | ||
29208e82 | 5804 | DEFVAR_LISP ("first-change-hook", Vfirst_change_hook, |
efc7e75f | 5805 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5806 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5807 | Vfirst_change_hook = Qnil; |
1ab256cb | 5808 | |
4b4deea2 | 5809 | DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer, undo_list), Qnil, |
7ee72033 | 5810 | doc: /* List of undo entries in current buffer. |
018ba359 PJ |
5811 | Recent changes come first; older changes follow newer. |
5812 | ||
5813 | An entry (BEG . END) represents an insertion which begins at | |
5814 | position BEG and ends at position END. | |
5815 | ||
5816 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5817 | from (abs POSITION). If POSITION is positive, point was at the front | |
5818 | of the text being deleted; if negative, point was at the end. | |
5819 | ||
5820 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5821 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5822 | of the visited file's modification time, as of that time. If the | |
5823 | modification time of the most recent save is different, this entry is | |
5824 | obsolete. | |
5825 | ||
5826 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5827 | was modified between BEG and END. PROPERTY is the property name, | |
5828 | and VALUE is the old value. | |
5829 | ||
7405f386 KS |
5830 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5831 | \(apply FUN-NAME ARGS). | |
5832 | ||
5833 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5834 | in the active region. BEG and END is the range affected by this entry | |
5835 | and DELTA is the number of bytes added or deleted in that range by | |
5836 | this change. | |
c6c7dc03 | 5837 | |
018ba359 PJ |
5838 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5839 | was adjusted in position by the offset DISTANCE (an integer). | |
5840 | ||
5841 | An entry of the form POSITION indicates that point was at the buffer | |
5842 | location given by the integer. Undoing an entry of this form places | |
5843 | point at POSITION. | |
5844 | ||
b4c4f2f4 JB |
5845 | Entries with value `nil' mark undo boundaries. The undo command treats |
5846 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5847 | |
5848 | If the value of the variable is t, undo information is not recorded. */); | |
5849 | ||
4b4deea2 | 5850 | DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer, mark_active), Qnil, |
7ee72033 | 5851 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); |
018ba359 | 5852 | |
4b4deea2 | 5853 | DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer, cache_long_line_scans), Qnil, |
7ee72033 | 5854 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. |
018ba359 PJ |
5855 | |
5856 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5857 | newlines. Columnar operations (like `move-to-column' and |
5858 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5859 | widths as they go. This works well for ordinary text, but if the |
5860 | buffer's lines are very long (say, more than 500 characters), these | |
5861 | motion functions will take longer to execute. Emacs may also take | |
5862 | longer to update the display. | |
5863 | ||
5629f29b | 5864 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5865 | results of their scans, and consult the cache to avoid rescanning |
5866 | regions of the buffer until the text is modified. The caches are most | |
5867 | beneficial when they prevent the most searching---that is, when the | |
5868 | buffer contains long lines and large regions of characters with the | |
5869 | same, fixed screen width. | |
5870 | ||
5629f29b | 5871 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5872 | become slightly slower (because of the overhead of consulting the |
5873 | cache), and the caches will use memory roughly proportional to the | |
5874 | number of newlines and characters whose screen width varies. | |
5875 | ||
5876 | The caches require no explicit maintenance; their accuracy is | |
5877 | maintained internally by the Emacs primitives. Enabling or disabling | |
5878 | the cache should not affect the behavior of any of the motion | |
5879 | functions; it should only affect their performance. */); | |
5880 | ||
4b4deea2 | 5881 | DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer, point_before_scroll), Qnil, |
7ee72033 | 5882 | doc: /* Value of point before the last series of scroll operations, or nil. */); |
018ba359 | 5883 | |
4b4deea2 | 5884 | DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer, file_format), Qnil, |
7ee72033 | 5885 | doc: /* List of formats to use when saving this buffer. |
018ba359 | 5886 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5887 | set when a file is visited. */); |
be9aafdd | 5888 | |
71ed49fa | 5889 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
4b4deea2 | 5890 | &BVAR (current_buffer, auto_save_file_format), Qnil, |
71ed49fa LT |
5891 | doc: /* *Format in which to write auto-save files. |
5892 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5893 | If it is t, which is the default, auto-save files are written in the | |
5894 | same format as a regular save would use. */); | |
5895 | ||
3cb719bd | 5896 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
4b4deea2 | 5897 | &BVAR (current_buffer, invisibility_spec), Qnil, |
7ee72033 | 5898 | doc: /* Invisibility spec of this buffer. |
018ba359 PJ |
5899 | The default is t, which means that text is invisible |
5900 | if it has a non-nil `invisible' property. | |
5901 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 5902 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
5903 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
5904 | then characters with property value PROP are invisible, | |
5905 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5906 | |
7962a441 | 5907 | DEFVAR_PER_BUFFER ("buffer-display-count", |
4b4deea2 | 5908 | &BVAR (current_buffer, display_count), Qnil, |
7ee72033 | 5909 | doc: /* A number incremented each time this buffer is displayed in a window. |
018ba359 | 5910 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5911 | |
5912 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
4b4deea2 | 5913 | &BVAR (current_buffer, display_time), Qnil, |
7ee72033 | 5914 | doc: /* Time stamp updated each time this buffer is displayed in a window. |
018ba359 PJ |
5915 | The function `set-window-buffer' updates this variable |
5916 | to the value obtained by calling `current-time'. | |
5917 | If the buffer has never been shown in a window, the value is nil. */); | |
5918 | ||
29208e82 | 5919 | DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode, |
9d794026 GM |
5920 | doc: /* Non-nil if Transient Mark mode is enabled. |
5921 | See the command `transient-mark-mode' for a description of this minor mode. | |
5922 | ||
5923 | Non-nil also enables highlighting of the region whenever the mark is active. | |
5924 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5925 | all windows or just the selected window. | |
5926 | ||
f49d1f52 | 5927 | Lisp programs may give this variable certain special values: |
9d794026 | 5928 | |
f49d1f52 SM |
5929 | - A value of `lambda' enables Transient Mark mode temporarily. |
5930 | It is disabled again after any subsequent action that would | |
5931 | normally deactivate the mark (e.g. buffer modification). | |
5932 | ||
5933 | - A value of (only . OLDVAL) enables Transient Mark mode | |
5934 | temporarily. After any subsequent point motion command that is | |
5935 | not shift-translated, or any other action that would normally | |
5936 | deactivate the mark (e.g. buffer modification), the value of | |
5937 | `transient-mark-mode' is set to OLDVAL. */); | |
c48f61ef RS |
5938 | Vtransient_mark_mode = Qnil; |
5939 | ||
29208e82 | 5940 | DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only, |
7ee72033 | 5941 | doc: /* *Non-nil means disregard read-only status of buffers or characters. |
018ba359 PJ |
5942 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5943 | text properties. If the value is a list, disregard `buffer-read-only' | |
5944 | and disregard a `read-only' text property if the property value | |
5945 | is a member of the list. */); | |
a96b68f1 RS |
5946 | Vinhibit_read_only = Qnil; |
5947 | ||
4b4deea2 | 5948 | DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer, cursor_type), Qnil, |
f6e22881 | 5949 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5950 | Values are interpreted as follows: |
5951 | ||
b8dc613f JB |
5952 | t use the cursor specified for the frame |
5953 | nil don't display a cursor | |
5954 | box display a filled box cursor | |
5955 | hollow display a hollow box cursor | |
5956 | bar display a vertical bar cursor with default width | |
5957 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5958 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5959 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5960 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 5961 | |
e08b1705 MR |
5962 | When the buffer is displayed in a non-selected window, the |
5963 | cursor's appearance is instead controlled by the variable | |
5964 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 5965 | |
a3bbced0 | 5966 | DEFVAR_PER_BUFFER ("line-spacing", |
4b4deea2 | 5967 | &BVAR (current_buffer, extra_line_spacing), Qnil, |
7ee72033 | 5968 | doc: /* Additional space to put between lines when displaying a buffer. |
3ba010e5 EZ |
5969 | The space is measured in pixels, and put below lines on graphic displays, |
5970 | see `display-graphic-p'. | |
60ebfdf3 | 5971 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 5972 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 5973 | |
0124c5bd | 5974 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
4b4deea2 | 5975 | &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil, |
66c6abf0 GM |
5976 | doc: /* *Non-nil means show a cursor in non-selected windows. |
5977 | If nil, only shows a cursor in the selected window. | |
5978 | If t, displays a cursor related to the usual cursor type | |
5979 | \(a solid box becomes hollow, a bar becomes a narrower bar). | |
5980 | You can also specify the cursor type as in the `cursor-type' variable. | |
5981 | Use Custom to set this variable and update the display." */); | |
0124c5bd | 5982 | |
29208e82 | 5983 | DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions, |
f6e22881 JB |
5984 | doc: /* List of functions called with no args to query before killing a buffer. |
5985 | The buffer being killed will be current while the functions are running. | |
5986 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
5987 | Vkill_buffer_query_functions = Qnil; |
5988 | ||
29208e82 | 5989 | DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook, |
43ed3b8d CY |
5990 | doc: /* Normal hook run before changing the major mode of a buffer. |
5991 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
5992 | Vchange_major_mode_hook = Qnil; | |
cd3520a4 | 5993 | DEFSYM (Qchange_major_mode_hook, "change-major-mode-hook"); |
43ed3b8d | 5994 | |
9397e56f MR |
5995 | DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook, |
5996 | doc: /* Hook run when the buffer list changes. | |
5997 | Functions running this hook are `get-buffer-create', | |
5998 | `make-indirect-buffer', `rename-buffer', `kill-buffer', | |
5999 | `record-buffer' and `unrecord-buffer'. */); | |
6000 | Vbuffer_list_update_hook = Qnil; | |
cd3520a4 | 6001 | DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook"); |
9397e56f | 6002 | |
0dc88e60 | 6003 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6004 | defsubr (&Sbuffer_list); |
6005 | defsubr (&Sget_buffer); | |
6006 | defsubr (&Sget_file_buffer); | |
6007 | defsubr (&Sget_buffer_create); | |
336cd056 | 6008 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6009 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6010 | defsubr (&Sbuffer_name); |
6011 | /*defsubr (&Sbuffer_number);*/ | |
6012 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6013 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6014 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6015 | defsubr (&Sbuffer_local_variables); |
6016 | defsubr (&Sbuffer_modified_p); | |
6017 | defsubr (&Sset_buffer_modified_p); | |
6018 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6019 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6020 | defsubr (&Srename_buffer); |
6021 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6022 | defsubr (&Sbuffer_enable_undo); |
6023 | defsubr (&Skill_buffer); | |
e4ed06f1 | 6024 | defsubr (&Sbury_buffer_internal); |
a9ee7a59 | 6025 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6026 | defsubr (&Scurrent_buffer); |
6027 | defsubr (&Sset_buffer); | |
6028 | defsubr (&Sbarf_if_buffer_read_only); | |
3ac81adb | 6029 | defsubr (&Serase_buffer); |
13cda5f9 | 6030 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6031 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6032 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6033 | |
52f8ec73 | 6034 | defsubr (&Soverlayp); |
2eec3b4e RS |
6035 | defsubr (&Smake_overlay); |
6036 | defsubr (&Sdelete_overlay); | |
6037 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6038 | defsubr (&Soverlay_start); |
6039 | defsubr (&Soverlay_end); | |
6040 | defsubr (&Soverlay_buffer); | |
6041 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6042 | defsubr (&Soverlays_at); |
74514898 | 6043 | defsubr (&Soverlays_in); |
2eec3b4e | 6044 | defsubr (&Snext_overlay_change); |
239c932b | 6045 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6046 | defsubr (&Soverlay_recenter); |
6047 | defsubr (&Soverlay_lists); | |
6048 | defsubr (&Soverlay_get); | |
6049 | defsubr (&Soverlay_put); | |
a8c21b48 | 6050 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6051 | } |
6052 | ||
dfcf069d | 6053 | void |
d3da34e0 | 6054 | keys_of_buffer (void) |
1ab256cb RM |
6055 | { |
6056 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6057 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6058 | |
6059 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6060 | initialized when that function gets called. */ | |
d67b4f80 | 6061 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6062 | } |