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