1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
37 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
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. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
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.
70 When a buffer has its own local value for a slot,
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.
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.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
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. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
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)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static Lisp_Object
Fset_buffer_major_mode (Lisp_Object
);
111 static Lisp_Object
Fdelete_overlay (Lisp_Object
);
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
);
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
;
123 static Lisp_Object Qkill_buffer_query_functions
;
125 /* Hook run before changing a major mode. */
126 static Lisp_Object Qchange_major_mode_hook
;
128 Lisp_Object Qfirst_change_hook
;
129 Lisp_Object Qbefore_change_functions
;
130 Lisp_Object Qafter_change_functions
;
131 static Lisp_Object Qucs_set_table_for_input
;
133 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
134 static Lisp_Object Qpermanent_local_hook
;
136 static Lisp_Object Qprotected_field
;
138 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
140 static Lisp_Object Qkill_buffer_hook
;
141 static Lisp_Object Qbuffer_list_update_hook
;
143 static Lisp_Object Qget_file_buffer
;
145 static Lisp_Object Qoverlayp
;
147 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
149 static Lisp_Object Qevaporate
;
151 Lisp_Object Qmodification_hooks
;
152 Lisp_Object Qinsert_in_front_hooks
;
153 Lisp_Object Qinsert_behind_hooks
;
155 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
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
*);
161 /* For debugging; temporary. See set_buffer_internal. */
162 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
165 nsberror (Lisp_Object spec
)
168 error ("No buffer named %s", SDATA (spec
));
169 error ("Invalid buffer argument");
172 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
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. */)
177 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
181 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
182 doc
: /* Return a list of all existing live buffers.
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. */)
189 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
193 Lisp_Object framelist
, prevlist
, tail
;
197 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
198 prevlist
= Fnreverse (Fcopy_sequence
199 (XFRAME (frame
)->buried_buffer_list
));
201 /* Remove from GENERAL any buffer that duplicates one in
202 FRAMELIST or PREVLIST. */
206 general
= Fdelq (XCAR (tail
), general
);
212 general
= Fdelq (XCAR (tail
), general
);
219 return Fnconc (3, args
);
225 /* Like Fassoc, but use Fstring_equal to compare
226 (which ignores text properties),
227 and don't ever QUIT. */
230 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
232 register Lisp_Object tail
;
233 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
235 register Lisp_Object elt
, tem
;
237 tem
= Fstring_equal (Fcar (elt
), key
);
244 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
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. */)
249 (register Lisp_Object buffer_or_name
)
251 if (BUFFERP (buffer_or_name
))
252 return buffer_or_name
;
253 CHECK_STRING (buffer_or_name
);
255 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
258 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
259 doc
: /* Return the buffer visiting file FILENAME (a string).
260 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
261 If there is no such live buffer, return nil.
262 See also `find-buffer-visiting'. */)
263 (register Lisp_Object filename
)
265 register Lisp_Object tail
, buf
, tem
;
268 CHECK_STRING (filename
);
269 filename
= Fexpand_file_name (filename
, Qnil
);
271 /* If the file name has special constructs in it,
272 call the corresponding file handler. */
273 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
276 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
278 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
281 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
283 buf
= Fcdr (XCAR (tail
));
284 if (!BUFFERP (buf
)) continue;
285 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
286 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
294 get_truename_buffer (register Lisp_Object filename
)
296 register Lisp_Object tail
, buf
, tem
;
298 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
300 buf
= Fcdr (XCAR (tail
));
301 if (!BUFFERP (buf
)) continue;
302 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
303 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
310 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
311 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
312 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
313 return that buffer. If no such buffer exists, create a new buffer with
314 that name and return it. If BUFFER-OR-NAME starts with a space, the new
315 buffer does not keep undo information.
317 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
318 even if it is dead. The return value is never nil. */)
319 (register Lisp_Object buffer_or_name
)
321 register Lisp_Object buffer
, name
;
322 register struct buffer
*b
;
324 buffer
= Fget_buffer (buffer_or_name
);
328 if (SCHARS (buffer_or_name
) == 0)
329 error ("Empty string for buffer name is not allowed");
331 b
= allocate_buffer ();
333 /* An ordinary buffer uses its own struct buffer_text. */
334 b
->text
= &b
->own_text
;
337 BUF_GAP_SIZE (b
) = 20;
339 /* We allocate extra 1-byte at the tail and keep it always '\0' for
340 anchoring a search. */
341 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
343 if (! BUF_BEG_ADDR (b
))
344 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
349 b
->pt_byte
= BEG_BYTE
;
350 b
->begv_byte
= BEG_BYTE
;
351 b
->zv_byte
= BEG_BYTE
;
354 BUF_GPT_BYTE (b
) = BEG_BYTE
;
357 BUF_Z_BYTE (b
) = BEG_BYTE
;
359 BUF_CHARS_MODIFF (b
) = 1;
360 BUF_OVERLAY_MODIFF (b
) = 1;
361 BUF_SAVE_MODIFF (b
) = 1;
362 BUF_INTERVALS (b
) = 0;
363 BUF_UNCHANGED_MODIFIED (b
) = 1;
364 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
365 BUF_END_UNCHANGED (b
) = 0;
366 BUF_BEG_UNCHANGED (b
) = 0;
367 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
368 b
->text
->inhibit_shrinking
= 0;
370 b
->newline_cache
= 0;
371 b
->width_run_cache
= 0;
372 BVAR (b
, width_table
) = Qnil
;
373 b
->prevent_redisplay_optimizations_p
= 1;
375 /* Put this on the chain of all buffers including killed ones. */
376 b
->header
.next
.buffer
= all_buffers
;
379 /* An ordinary buffer normally doesn't need markers
380 to handle BEGV and ZV. */
381 BVAR (b
, pt_marker
) = Qnil
;
382 BVAR (b
, begv_marker
) = Qnil
;
383 BVAR (b
, zv_marker
) = Qnil
;
385 name
= Fcopy_sequence (buffer_or_name
);
386 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
387 BVAR (b
, name
) = name
;
389 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
392 reset_buffer_local_variables (b
, 1);
394 BVAR (b
, mark
) = Fmake_marker ();
395 BUF_MARKERS (b
) = NULL
;
396 BVAR (b
, name
) = name
;
398 /* Put this in the alist of all live buffers. */
399 XSETBUFFER (buffer
, b
);
400 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
401 /* And run buffer-list-update-hook. */
402 if (!NILP (Vrun_hooks
))
403 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
405 /* An error in calling the function here (should someone redefine it)
406 can lead to infinite regress until you run out of stack. rms
407 says that's not worth protecting against. */
408 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
409 /* buffer is on buffer-alist, so no gcpro. */
410 call1 (Qucs_set_table_for_input
, buffer
);
416 /* Return a list of overlays which is a copy of the overlay list
417 LIST, but for buffer B. */
419 static struct Lisp_Overlay
*
420 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
423 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
425 XSETBUFFER (buffer
, b
);
427 for (; list
; list
= list
->next
)
429 Lisp_Object overlay
, start
, end
, old_overlay
;
432 XSETMISC (old_overlay
, list
);
433 charpos
= marker_position (OVERLAY_START (old_overlay
));
434 start
= Fmake_marker ();
435 Fset_marker (start
, make_number (charpos
), buffer
);
436 XMARKER (start
)->insertion_type
437 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
439 charpos
= marker_position (OVERLAY_END (old_overlay
));
440 end
= Fmake_marker ();
441 Fset_marker (end
, make_number (charpos
), buffer
);
442 XMARKER (end
)->insertion_type
443 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
445 overlay
= allocate_misc ();
446 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
447 OVERLAY_START (overlay
) = start
;
448 OVERLAY_END (overlay
) = end
;
449 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
450 XOVERLAY (overlay
)->next
= NULL
;
453 tail
= tail
->next
= XOVERLAY (overlay
);
455 result
= tail
= XOVERLAY (overlay
);
462 /* Clone per-buffer values of buffer FROM.
464 Buffer TO gets the same per-buffer values as FROM, with the
465 following exceptions: (1) TO's name is left untouched, (2) markers
466 are copied and made to refer to TO, and (3) overlay lists are
470 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
472 Lisp_Object to_buffer
;
475 XSETBUFFER (to_buffer
, to
);
477 /* buffer-local Lisp variables start at `undo_list',
478 tho only the ones from `name' on are GC'd normally. */
479 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
480 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
481 offset
+= sizeof (Lisp_Object
))
485 /* Don't touch the `name' which should be unique for every buffer. */
486 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
489 obj
= PER_BUFFER_VALUE (from
, offset
);
490 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
492 struct Lisp_Marker
*m
= XMARKER (obj
);
493 obj
= Fmake_marker ();
494 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
495 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
498 PER_BUFFER_VALUE (to
, offset
) = obj
;
501 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
503 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
504 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
506 /* Get (a copy of) the alist of Lisp-level local variables of FROM
507 and install that in TO. */
508 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
512 /* If buffer B has markers to record PT, BEGV and ZV when it is not
513 current, update these markers. */
516 record_buffer_markers (struct buffer
*b
)
518 if (! NILP (BVAR (b
, pt_marker
)))
522 eassert (!NILP (BVAR (b
, begv_marker
)));
523 eassert (!NILP (BVAR (b
, zv_marker
)));
525 XSETBUFFER (buffer
, b
);
526 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
527 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
528 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
533 /* If buffer B has markers to record PT, BEGV and ZV when it is not
534 current, fetch these values into B->begv etc. */
537 fetch_buffer_markers (struct buffer
*b
)
539 if (! NILP (BVAR (b
, pt_marker
)))
543 eassert (!NILP (BVAR (b
, begv_marker
)));
544 eassert (!NILP (BVAR (b
, zv_marker
)));
546 m
= BVAR (b
, pt_marker
);
547 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
549 m
= BVAR (b
, begv_marker
);
550 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
552 m
= BVAR (b
, zv_marker
);
553 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
558 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
560 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
561 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
562 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
563 NAME should be a string which is not the name of an existing buffer.
564 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
565 such as major and minor modes, in the indirect buffer.
566 CLONE nil means the indirect buffer's state is reset to default values. */)
567 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
569 Lisp_Object buf
, tem
;
573 buf
= Fget_buffer (name
);
575 error ("Buffer name `%s' is in use", SDATA (name
));
578 base_buffer
= Fget_buffer (base_buffer
);
579 if (NILP (base_buffer
))
580 error ("No such buffer: `%s'", SDATA (tem
));
581 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
582 error ("Base buffer has been killed");
584 if (SCHARS (name
) == 0)
585 error ("Empty string for buffer name is not allowed");
587 b
= allocate_buffer ();
589 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
590 ? XBUFFER (base_buffer
)->base_buffer
591 : XBUFFER (base_buffer
));
593 /* Use the base buffer's text object. */
594 b
->text
= b
->base_buffer
->text
;
596 b
->pt
= b
->base_buffer
->pt
;
597 b
->begv
= b
->base_buffer
->begv
;
598 b
->zv
= b
->base_buffer
->zv
;
599 b
->pt_byte
= b
->base_buffer
->pt_byte
;
600 b
->begv_byte
= b
->base_buffer
->begv_byte
;
601 b
->zv_byte
= b
->base_buffer
->zv_byte
;
603 b
->newline_cache
= 0;
604 b
->width_run_cache
= 0;
605 BVAR (b
, width_table
) = Qnil
;
607 /* Put this on the chain of all buffers including killed ones. */
608 b
->header
.next
.buffer
= all_buffers
;
611 name
= Fcopy_sequence (name
);
612 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
613 BVAR (b
, name
) = name
;
616 reset_buffer_local_variables (b
, 1);
618 /* Put this in the alist of all live buffers. */
620 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
622 BVAR (b
, mark
) = Fmake_marker ();
623 BVAR (b
, name
) = name
;
625 /* The multibyte status belongs to the base buffer. */
626 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
628 /* Make sure the base buffer has markers for its narrowing. */
629 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
631 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
632 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
634 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
635 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
637 b
->base_buffer
->pt_byte
);
639 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
640 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
641 b
->base_buffer
->begv
,
642 b
->base_buffer
->begv_byte
);
644 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
645 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
647 b
->base_buffer
->zv_byte
);
648 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
653 /* Give the indirect buffer markers for its narrowing. */
654 BVAR (b
, pt_marker
) = Fmake_marker ();
655 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
656 BVAR (b
, begv_marker
) = Fmake_marker ();
657 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
658 BVAR (b
, zv_marker
) = Fmake_marker ();
659 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
660 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
664 struct buffer
*old_b
= current_buffer
;
666 clone_per_buffer_values (b
->base_buffer
, b
);
667 BVAR (b
, filename
) = Qnil
;
668 BVAR (b
, file_truename
) = Qnil
;
669 BVAR (b
, display_count
) = make_number (0);
670 BVAR (b
, backed_up
) = Qnil
;
671 BVAR (b
, auto_save_file_name
) = Qnil
;
672 set_buffer_internal_1 (b
);
673 Fset (intern ("buffer-save-without-query"), Qnil
);
674 Fset (intern ("buffer-file-number"), Qnil
);
675 Fset (intern ("buffer-stale-function"), Qnil
);
676 set_buffer_internal_1 (old_b
);
679 /* Run buffer-list-update-hook. */
680 if (!NILP (Vrun_hooks
))
681 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
687 delete_all_overlays (struct buffer
*b
)
691 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
692 have to empty the list, otherwise we end up with overlays that
693 think they belong to this buffer while the buffer doesn't know about
695 while (b
->overlays_before
)
697 XSETMISC (overlay
, b
->overlays_before
);
698 Fdelete_overlay (overlay
);
700 while (b
->overlays_after
)
702 XSETMISC (overlay
, b
->overlays_after
);
703 Fdelete_overlay (overlay
);
705 eassert (b
->overlays_before
== NULL
);
706 eassert (b
->overlays_after
== NULL
);
709 /* Reinitialize everything about a buffer except its name and contents
711 If called on an already-initialized buffer, the list of overlays
712 should be deleted before calling this function, otherwise we end up
713 with overlays that claim to belong to the buffer but the buffer
714 claims it doesn't belong to it. */
717 reset_buffer (register struct buffer
*b
)
719 BVAR (b
, filename
) = Qnil
;
720 BVAR (b
, file_truename
) = Qnil
;
721 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
723 b
->modtime_size
= -1;
724 XSETFASTINT (BVAR (b
, save_length
), 0);
725 b
->last_window_start
= 1;
726 /* It is more conservative to start out "changed" than "unchanged". */
728 b
->prevent_redisplay_optimizations_p
= 1;
729 BVAR (b
, backed_up
) = Qnil
;
730 BUF_AUTOSAVE_MODIFF (b
) = 0;
731 b
->auto_save_failure_time
= 0;
732 BVAR (b
, auto_save_file_name
) = Qnil
;
733 BVAR (b
, read_only
) = Qnil
;
734 b
->overlays_before
= NULL
;
735 b
->overlays_after
= NULL
;
736 b
->overlay_center
= BEG
;
737 BVAR (b
, mark_active
) = Qnil
;
738 BVAR (b
, point_before_scroll
) = Qnil
;
739 BVAR (b
, file_format
) = Qnil
;
740 BVAR (b
, auto_save_file_format
) = Qt
;
741 BVAR (b
, last_selected_window
) = Qnil
;
742 XSETINT (BVAR (b
, display_count
), 0);
743 BVAR (b
, display_time
) = Qnil
;
744 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
745 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
746 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
748 b
->display_error_modiff
= 0;
751 /* Reset buffer B's local variables info.
752 Don't use this on a buffer that has already been in use;
753 it does not treat permanent locals consistently.
754 Instead, use Fkill_all_local_variables.
756 If PERMANENT_TOO is 1, then we reset permanent
757 buffer-local variables. If PERMANENT_TOO is 0,
758 we preserve those. */
761 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
766 /* Reset the major mode to Fundamental, together with all the
767 things that depend on the major mode.
768 default-major-mode is handled at a higher level.
769 We ignore it here. */
770 BVAR (b
, major_mode
) = Qfundamental_mode
;
771 BVAR (b
, keymap
) = Qnil
;
772 BVAR (b
, mode_name
) = QSFundamental
;
773 BVAR (b
, minor_modes
) = Qnil
;
775 /* If the standard case table has been altered and invalidated,
776 fix up its insides first. */
777 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
778 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
779 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
780 Fset_standard_case_table (Vascii_downcase_table
);
782 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
783 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
784 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
785 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
786 BVAR (b
, invisibility_spec
) = Qt
;
788 /* Reset all (or most) per-buffer variables to their defaults. */
790 BVAR (b
, local_var_alist
) = Qnil
;
793 Lisp_Object tmp
, prop
, last
= Qnil
;
794 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
795 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
797 /* If permanent-local, keep it. */
799 if (EQ (prop
, Qpermanent_local_hook
))
801 /* This is a partially permanent hook variable.
802 Preserve only the elements that want to be preserved. */
803 Lisp_Object list
, newlist
;
804 list
= XCDR (XCAR (tmp
));
808 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
810 Lisp_Object elt
= XCAR (list
);
811 /* Preserve element ELT if it's t,
812 if it is a function with a `permanent-local-hook' property,
813 or if it's not a symbol. */
816 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
817 newlist
= Fcons (elt
, newlist
);
819 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
822 /* Delete this local variable. */
823 else if (NILP (last
))
824 BVAR (b
, local_var_alist
) = XCDR (tmp
);
826 XSETCDR (last
, XCDR (tmp
));
829 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
830 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
831 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
833 /* For each slot that has a default value,
834 copy that into the slot. */
836 /* buffer-local Lisp variables start at `undo_list',
837 tho only the ones from `name' on are GC'd normally. */
838 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
839 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
840 offset
+= sizeof (Lisp_Object
))
842 int idx
= PER_BUFFER_IDX (offset
);
845 || buffer_permanent_local_flags
[idx
] == 0)))
846 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
850 /* We split this away from generate-new-buffer, because rename-buffer
851 and set-visited-file-name ought to be able to use this to really
852 rename the buffer properly. */
854 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
855 Sgenerate_new_buffer_name
, 1, 2, 0,
856 doc
: /* Return a string that is the name of no existing buffer based on NAME.
857 If there is no live buffer named NAME, then return NAME.
858 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
859 \(starting at 2) until an unused name is found, and then return that name.
860 Optional second argument IGNORE specifies a name that is okay to use (if
861 it is in the sequence to be tried) even if a buffer with that name exists. */)
862 (register Lisp_Object name
, Lisp_Object ignore
)
864 register Lisp_Object gentemp
, tem
;
866 char number
[INT_BUFSIZE_BOUND (EMACS_INT
) + sizeof "<>"];
870 tem
= Fstring_equal (name
, ignore
);
873 tem
= Fget_buffer (name
);
880 sprintf (number
, "<%"pI
"d>", ++count
);
881 gentemp
= concat2 (name
, build_string (number
));
882 tem
= Fstring_equal (gentemp
, ignore
);
885 tem
= Fget_buffer (gentemp
);
892 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
893 doc
: /* Return the name of BUFFER, as a string.
894 BUFFER defaults to the current buffer.
895 Return nil if BUFFER has been killed. */)
896 (register Lisp_Object buffer
)
899 return BVAR (current_buffer
, name
);
900 CHECK_BUFFER (buffer
);
901 return BVAR (XBUFFER (buffer
), name
);
904 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
905 doc
: /* Return name of file BUFFER is visiting, or nil if none.
906 No argument or nil as argument means use the current buffer. */)
907 (register Lisp_Object buffer
)
910 return BVAR (current_buffer
, filename
);
911 CHECK_BUFFER (buffer
);
912 return BVAR (XBUFFER (buffer
), filename
);
915 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
917 doc
: /* Return the base buffer of indirect buffer BUFFER.
918 If BUFFER is not indirect, return nil.
919 BUFFER defaults to the current buffer. */)
920 (register Lisp_Object buffer
)
923 Lisp_Object base_buffer
;
926 base
= current_buffer
->base_buffer
;
929 CHECK_BUFFER (buffer
);
930 base
= XBUFFER (buffer
)->base_buffer
;
935 XSETBUFFER (base_buffer
, base
);
939 DEFUN ("buffer-local-value", Fbuffer_local_value
,
940 Sbuffer_local_value
, 2, 2, 0,
941 doc
: /* Return the value of VARIABLE in BUFFER.
942 If VARIABLE does not have a buffer-local binding in BUFFER, the value
943 is the default binding of the variable. */)
944 (register Lisp_Object variable
, register Lisp_Object buffer
)
946 register struct buffer
*buf
;
947 register Lisp_Object result
;
948 struct Lisp_Symbol
*sym
;
950 CHECK_SYMBOL (variable
);
951 CHECK_BUFFER (buffer
);
952 buf
= XBUFFER (buffer
);
953 sym
= XSYMBOL (variable
);
956 switch (sym
->redirect
)
958 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
959 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
960 case SYMBOL_LOCALIZED
:
961 { /* Look in local_var_alist. */
962 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
963 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
964 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
968 { /* What binding is loaded right now? */
969 Lisp_Object current_alist_element
= blv
->valcell
;
971 /* The value of the currently loaded binding is not
972 stored in it, but rather in the realvalue slot.
973 Store that value into the binding it belongs to
974 in case that is the one we are about to use. */
976 XSETCDR (current_alist_element
,
977 do_symval_forwarding (blv
->fwd
));
979 /* Now get the (perhaps updated) value out of the binding. */
980 result
= XCDR (result
);
983 result
= Fdefault_value (variable
);
986 case SYMBOL_FORWARDED
:
988 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
989 if (BUFFER_OBJFWDP (fwd
))
990 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
992 result
= Fdefault_value (variable
);
998 if (!EQ (result
, Qunbound
))
1001 xsignal1 (Qvoid_variable
, variable
);
1004 /* Return an alist of the Lisp-level buffer-local bindings of
1005 buffer BUF. That is, don't include the variables maintained
1006 in special slots in the buffer object. */
1009 buffer_lisp_local_variables (struct buffer
*buf
)
1011 Lisp_Object result
= Qnil
;
1012 register Lisp_Object tail
;
1013 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1015 Lisp_Object val
, elt
;
1019 /* Reference each variable in the alist in buf.
1020 If inquiring about the current buffer, this gets the current values,
1021 so store them into the alist so the alist is up to date.
1022 If inquiring about some other buffer, this swaps out any values
1023 for that buffer, making the alist up to date automatically. */
1024 val
= find_symbol_value (XCAR (elt
));
1025 /* Use the current buffer value only if buf is the current buffer. */
1026 if (buf
!= current_buffer
)
1029 result
= Fcons (EQ (val
, Qunbound
)
1031 : Fcons (XCAR (elt
), val
),
1038 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1039 Sbuffer_local_variables
, 0, 1, 0,
1040 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1041 Most elements look like (SYMBOL . VALUE), describing one variable.
1042 For a symbol that is locally unbound, just the symbol appears in the value.
1043 Note that storing new VALUEs in these elements doesn't change the variables.
1044 No argument or nil as argument means use current buffer as BUFFER. */)
1045 (register Lisp_Object buffer
)
1047 register struct buffer
*buf
;
1048 register Lisp_Object result
;
1051 buf
= current_buffer
;
1054 CHECK_BUFFER (buffer
);
1055 buf
= XBUFFER (buffer
);
1058 result
= buffer_lisp_local_variables (buf
);
1060 /* Add on all the variables stored in special slots. */
1064 /* buffer-local Lisp variables start at `undo_list',
1065 tho only the ones from `name' on are GC'd normally. */
1066 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
1067 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
1068 /* sizeof EMACS_INT == sizeof Lisp_Object */
1069 offset
+= (sizeof (EMACS_INT
)))
1071 idx
= PER_BUFFER_IDX (offset
);
1072 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1073 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1075 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1076 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1077 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1086 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1088 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1089 No argument or nil as argument means use current buffer as BUFFER. */)
1090 (register Lisp_Object buffer
)
1092 register struct buffer
*buf
;
1094 buf
= current_buffer
;
1097 CHECK_BUFFER (buffer
);
1098 buf
= XBUFFER (buffer
);
1101 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1104 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1106 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1107 A non-nil FLAG means mark the buffer modified. */)
1108 (register Lisp_Object flag
)
1110 register int already
;
1111 register Lisp_Object fn
;
1112 Lisp_Object buffer
, window
;
1114 #ifdef CLASH_DETECTION
1115 /* If buffer becoming modified, lock the file.
1116 If buffer becoming unmodified, unlock the file. */
1118 fn
= BVAR (current_buffer
, file_truename
);
1119 /* Test buffer-file-name so that binding it to nil is effective. */
1120 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1122 already
= SAVE_MODIFF
< MODIFF
;
1123 if (!already
&& !NILP (flag
))
1125 else if (already
&& NILP (flag
))
1128 #endif /* CLASH_DETECTION */
1130 /* Here we have a problem. SAVE_MODIFF is used here to encode
1131 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1132 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1133 modify SAVE_MODIFF to affect one, we may affect the other
1135 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1136 if SAVE_MODIFF<auto_save_modified that means we risk changing
1137 recent-auto-save-p from t to nil.
1138 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1139 we risk changing recent-auto-save-p from nil to t. */
1140 SAVE_MODIFF
= (NILP (flag
)
1141 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1143 /* Let's try to preserve recent-auto-save-p. */
1144 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1145 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1146 we can either decrease SAVE_MODIFF and auto_save_modified
1147 or increase MODIFF. */
1150 /* Set update_mode_lines only if buffer is displayed in some window.
1151 Packages like jit-lock or lazy-lock preserve a buffer's modified
1152 state by recording/restoring the state around blocks of code.
1153 Setting update_mode_lines makes redisplay consider all windows
1154 (on all frames). Stealth fontification of buffers not displayed
1155 would incur additional redisplay costs if we'd set
1156 update_modes_lines unconditionally.
1158 Ideally, I think there should be another mechanism for fontifying
1159 buffers without "modifying" buffers, or redisplay should be
1160 smarter about updating the `*' in mode lines. --gerd */
1161 XSETBUFFER (buffer
, current_buffer
);
1162 window
= Fget_buffer_window (buffer
, Qt
);
1163 if (WINDOWP (window
))
1165 ++update_mode_lines
;
1166 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1172 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1173 Srestore_buffer_modified_p
, 1, 1, 0,
1174 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1175 It is not ensured that mode lines will be updated to show the modified
1176 state of the current buffer. Use with care. */)
1179 #ifdef CLASH_DETECTION
1182 /* If buffer becoming modified, lock the file.
1183 If buffer becoming unmodified, unlock the file. */
1185 fn
= BVAR (current_buffer
, file_truename
);
1186 /* Test buffer-file-name so that binding it to nil is effective. */
1187 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1189 int already
= SAVE_MODIFF
< MODIFF
;
1190 if (!already
&& !NILP (flag
))
1192 else if (already
&& NILP (flag
))
1195 #endif /* CLASH_DETECTION */
1197 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1201 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1203 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1204 Each buffer has a tick counter which is incremented each time the
1205 text in that buffer is changed. It wraps around occasionally.
1206 No argument or nil as argument means use current buffer as BUFFER. */)
1207 (register Lisp_Object buffer
)
1209 register struct buffer
*buf
;
1211 buf
= current_buffer
;
1214 CHECK_BUFFER (buffer
);
1215 buf
= XBUFFER (buffer
);
1218 return make_number (BUF_MODIFF (buf
));
1221 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1222 Sbuffer_chars_modified_tick
, 0, 1, 0,
1223 doc
: /* Return BUFFER's character-change tick counter.
1224 Each buffer has a character-change tick counter, which is set to the
1225 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1226 time text in that buffer is inserted or deleted. By comparing the
1227 values returned by two individual calls of `buffer-chars-modified-tick',
1228 you can tell whether a character change occurred in that buffer in
1229 between these calls. No argument or nil as argument means use current
1230 buffer as BUFFER. */)
1231 (register Lisp_Object buffer
)
1233 register struct buffer
*buf
;
1235 buf
= current_buffer
;
1238 CHECK_BUFFER (buffer
);
1239 buf
= XBUFFER (buffer
);
1242 return make_number (BUF_CHARS_MODIFF (buf
));
1245 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1246 "(list (read-string \"Rename buffer (to new name): \" \
1247 nil 'buffer-name-history (buffer-name (current-buffer))) \
1248 current-prefix-arg)",
1249 doc
: /* Change current buffer's name to NEWNAME (a string).
1250 If second arg UNIQUE is nil or omitted, it is an error if a
1251 buffer named NEWNAME already exists.
1252 If UNIQUE is non-nil, come up with a new name using
1253 `generate-new-buffer-name'.
1254 Interactively, you can set UNIQUE with a prefix argument.
1255 We return the name we actually gave the buffer.
1256 This does not change the name of the visited file (if any). */)
1257 (register Lisp_Object newname
, Lisp_Object unique
)
1259 register Lisp_Object tem
, buf
;
1261 CHECK_STRING (newname
);
1263 if (SCHARS (newname
) == 0)
1264 error ("Empty string is invalid as a buffer name");
1266 tem
= Fget_buffer (newname
);
1269 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1270 rename the buffer automatically so you can create another
1271 with the original name. It makes UNIQUE equivalent to
1272 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1273 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1274 return BVAR (current_buffer
, name
);
1276 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1278 error ("Buffer name `%s' is in use", SDATA (newname
));
1281 BVAR (current_buffer
, name
) = newname
;
1283 /* Catch redisplay's attention. Unless we do this, the mode lines for
1284 any windows displaying current_buffer will stay unchanged. */
1285 update_mode_lines
++;
1287 XSETBUFFER (buf
, current_buffer
);
1288 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1289 if (NILP (BVAR (current_buffer
, filename
))
1290 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1291 call0 (intern ("rename-auto-save-file"));
1293 /* Run buffer-list-update-hook. */
1294 if (!NILP (Vrun_hooks
))
1295 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1297 /* Refetch since that last call may have done GC. */
1298 return BVAR (current_buffer
, name
);
1301 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1302 doc
: /* Return most recently selected buffer other than BUFFER.
1303 Buffers not visible in windows are preferred to visible buffers, unless
1304 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1305 BUFFER unless it denotes a live buffer. If the optional third argument
1306 FRAME is non-nil, use that frame's buffer list instead of the selected
1307 frame's buffer list.
1309 The buffer is found by scanning the selected or specified frame's buffer
1310 list first, followed by the list of all buffers. If no other buffer
1311 exists, return the buffer `*scratch*' (creating it if necessary). */)
1312 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1314 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1315 Lisp_Object tail
, buf
, pred
;
1316 Lisp_Object notsogood
= Qnil
;
1319 frame
= selected_frame
;
1321 CHECK_FRAME (frame
);
1323 pred
= frame_buffer_predicate (frame
);
1324 /* Consider buffers that have been seen in the frame first. */
1325 tail
= XFRAME (frame
)->buffer_list
;
1326 for (; CONSP (tail
); tail
= XCDR (tail
))
1329 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1330 && !NILP (BVAR (XBUFFER (buf
), name
))
1331 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1332 /* If the frame has a buffer_predicate, disregard buffers that
1333 don't fit the predicate. */
1334 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1336 if (!NILP (visible_ok
)
1337 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1339 else if (NILP (notsogood
))
1344 /* Consider alist of all buffers next. */
1345 tail
= Vbuffer_alist
;
1346 for (; CONSP (tail
); tail
= XCDR (tail
))
1348 buf
= Fcdr (XCAR (tail
));
1349 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1350 && !NILP (BVAR (XBUFFER (buf
), name
))
1351 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1352 /* If the frame has a buffer_predicate, disregard buffers that
1353 don't fit the predicate. */
1354 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1356 if (!NILP (visible_ok
)
1357 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1359 else if (NILP (notsogood
))
1364 if (!NILP (notsogood
))
1368 buf
= Fget_buffer (build_string ("*scratch*"));
1371 buf
= Fget_buffer_create (build_string ("*scratch*"));
1372 Fset_buffer_major_mode (buf
);
1378 /* The following function is a safe variant of Fother_buffer: It doesn't
1379 pay attention to any frame-local buffer lists, doesn't care about
1380 visibility of buffers, and doesn't evaluate any frame predicates. */
1383 other_buffer_safely (Lisp_Object buffer
)
1385 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1386 Lisp_Object tail
, buf
;
1388 tail
= Vbuffer_alist
;
1389 for (; CONSP (tail
); tail
= XCDR (tail
))
1391 buf
= Fcdr (XCAR (tail
));
1392 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1393 && !NILP (BVAR (XBUFFER (buf
), name
))
1394 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1398 buf
= Fget_buffer (build_string ("*scratch*"));
1401 buf
= Fget_buffer_create (build_string ("*scratch*"));
1402 Fset_buffer_major_mode (buf
);
1408 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1410 doc
: /* Start keeping undo information for buffer BUFFER.
1411 No argument or nil as argument means do this for the current buffer. */)
1412 (register Lisp_Object buffer
)
1414 Lisp_Object real_buffer
;
1417 XSETBUFFER (real_buffer
, current_buffer
);
1420 real_buffer
= Fget_buffer (buffer
);
1421 if (NILP (real_buffer
))
1425 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1426 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1432 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1433 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1434 The buffer being killed will be current while the hook is running.\n\
1437 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1438 doc
: /* Kill buffer BUFFER-OR-NAME.
1439 The argument may be a buffer or the name of an existing buffer.
1440 Argument nil or omitted means kill the current buffer. Return t if the
1441 buffer is actually killed, nil otherwise.
1443 This function calls `replace-buffer-in-windows' for cleaning up all
1444 windows currently displaying the buffer to be killed. The functions in
1445 `kill-buffer-query-functions' are called with the buffer to be killed as
1446 the current buffer. If any of them returns nil, the buffer is not
1447 killed. The hook `kill-buffer-hook' is run before the buffer is
1448 actually killed. The buffer being killed will be current while the hook
1451 Any processes that have this buffer as the `process-buffer' are killed
1453 (Lisp_Object buffer_or_name
)
1456 register struct buffer
*b
;
1457 register Lisp_Object tem
;
1458 register struct Lisp_Marker
*m
;
1459 struct gcpro gcpro1
;
1461 if (NILP (buffer_or_name
))
1462 buffer
= Fcurrent_buffer ();
1464 buffer
= Fget_buffer (buffer_or_name
);
1466 nsberror (buffer_or_name
);
1468 b
= XBUFFER (buffer
);
1470 /* Avoid trouble for buffer already dead. */
1471 if (NILP (BVAR (b
, name
)))
1474 /* Query if the buffer is still modified. */
1475 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1476 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1479 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1480 BVAR (b
, name
), make_number (0)));
1486 /* Run hooks with the buffer to be killed the current buffer. */
1488 int count
= SPECPDL_INDEX ();
1489 Lisp_Object arglist
[1];
1491 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1492 set_buffer_internal (b
);
1494 /* First run the query functions; if any query is answered no,
1495 don't kill the buffer. */
1496 arglist
[0] = Qkill_buffer_query_functions
;
1497 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1499 return unbind_to (count
, Qnil
);
1501 /* Then run the hooks. */
1502 Frun_hooks (1, &Qkill_buffer_hook
);
1503 unbind_to (count
, Qnil
);
1506 /* We have no more questions to ask. Verify that it is valid
1507 to kill the buffer. This must be done after the questions
1508 since anything can happen within do_yes_or_no_p. */
1510 /* Don't kill the minibuffer now current. */
1511 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1514 if (NILP (BVAR (b
, name
)))
1517 /* When we kill a base buffer, kill all its indirect buffers.
1518 We do it at this stage so nothing terrible happens if they
1519 ask questions or their hooks get errors. */
1520 if (! b
->base_buffer
)
1522 struct buffer
*other
;
1526 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1527 /* all_buffers contains dead buffers too;
1528 don't re-kill them. */
1529 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1532 XSETBUFFER (buf
, other
);
1539 /* Run replace_buffer_in_windows before making another buffer current
1540 since set-window-buffer-start-and-point will refuse to make another
1541 buffer current if the selected window does not show the current
1542 buffer. (Bug#10114) */
1543 replace_buffer_in_windows (buffer
);
1545 /* Make this buffer not be current.
1546 In the process, notice if this is the sole visible buffer
1547 and give up if so. */
1548 if (b
== current_buffer
)
1550 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1552 if (b
== current_buffer
)
1556 /* Notice if the buffer to kill is the sole visible buffer
1557 when we're currently in the mini-buffer, and give up if so. */
1558 XSETBUFFER (tem
, current_buffer
);
1559 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1561 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1562 if (EQ (buffer
, tem
))
1566 /* Now there is no question: we can kill the buffer. */
1568 #ifdef CLASH_DETECTION
1569 /* Unlock this buffer's file, if it is locked. */
1571 #endif /* CLASH_DETECTION */
1574 kill_buffer_processes (buffer
);
1577 /* Killing buffer processes may run sentinels which may
1578 have called kill-buffer. */
1580 if (NILP (BVAR (b
, name
)))
1583 /* These may run Lisp code and into infinite loops (if someone
1584 insisted on circular lists) so allow quitting here. */
1585 frames_discard_buffer (buffer
);
1587 clear_charpos_cache (b
);
1589 tem
= Vinhibit_quit
;
1591 /* Remove the buffer from the list of all buffers. */
1592 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1593 /* If replace_buffer_in_windows didn't do its job correctly fix that
1595 replace_buffer_in_windows_safely (buffer
);
1596 Vinhibit_quit
= tem
;
1598 /* Delete any auto-save file, if we saved it in this session.
1599 But not if the buffer is modified. */
1600 if (STRINGP (BVAR (b
, auto_save_file_name
))
1601 && BUF_AUTOSAVE_MODIFF (b
) != 0
1602 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1603 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1604 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1607 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1608 if (! NILP (delete))
1609 internal_delete_file (BVAR (b
, auto_save_file_name
));
1614 /* Unchain all markers that belong to this indirect buffer.
1615 Don't unchain the markers that belong to the base buffer
1616 or its other indirect buffers. */
1617 for (m
= BUF_MARKERS (b
); m
; )
1619 struct Lisp_Marker
*next
= m
->next
;
1627 /* Unchain all markers of this buffer and its indirect buffers.
1628 and leave them pointing nowhere. */
1629 for (m
= BUF_MARKERS (b
); m
; )
1631 struct Lisp_Marker
*next
= m
->next
;
1636 BUF_MARKERS (b
) = NULL
;
1637 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1639 /* Perhaps we should explicitly free the interval tree here... */
1642 /* Reset the local variables, so that this buffer's local values
1643 won't be protected from GC. They would be protected
1644 if they happened to remain cached in their symbols.
1645 This gets rid of them for certain. */
1646 swap_out_buffer_local_variables (b
);
1647 reset_buffer_local_variables (b
, 1);
1649 BVAR (b
, name
) = Qnil
;
1652 if (! b
->base_buffer
)
1653 free_buffer_text (b
);
1655 if (b
->newline_cache
)
1657 free_region_cache (b
->newline_cache
);
1658 b
->newline_cache
= 0;
1660 if (b
->width_run_cache
)
1662 free_region_cache (b
->width_run_cache
);
1663 b
->width_run_cache
= 0;
1665 BVAR (b
, width_table
) = Qnil
;
1667 BVAR (b
, undo_list
) = Qnil
;
1669 /* Run buffer-list-update-hook. */
1670 if (!NILP (Vrun_hooks
))
1671 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1676 /* Move association for BUFFER to the front of buffer (a)lists. Since
1677 we do this each time BUFFER is selected visibly, the more recently
1678 selected buffers are always closer to the front of those lists. This
1679 means that other_buffer is more likely to choose a relevant buffer.
1681 Note that this moves BUFFER to the front of the buffer lists of the
1682 selected frame even if BUFFER is not shown there. If BUFFER is not
1683 shown in the selected frame, consider the present behavior a feature.
1684 `select-window' gets this right since it shows BUFFER in the selected
1685 window when calling us. */
1688 record_buffer (Lisp_Object buffer
)
1690 Lisp_Object aelt
, aelt_cons
, tem
;
1691 register struct frame
*f
= XFRAME (selected_frame
);
1693 CHECK_BUFFER (buffer
);
1695 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1696 Don't allow quitting since this might leave the buffer list in an
1697 inconsistent state. */
1698 tem
= Vinhibit_quit
;
1700 aelt
= Frassq (buffer
, Vbuffer_alist
);
1701 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1702 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1703 XSETCDR (aelt_cons
, Vbuffer_alist
);
1704 Vbuffer_alist
= aelt_cons
;
1705 Vinhibit_quit
= tem
;
1707 /* Update buffer list of selected frame. */
1708 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1709 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1711 /* Run buffer-list-update-hook. */
1712 if (!NILP (Vrun_hooks
))
1713 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1717 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1718 buffer is killed. For the selected frame's buffer list this moves
1719 BUFFER to its end even if it was never shown in that frame. If
1720 this happens we have a feature, hence `bury-buffer-internal' should be
1721 called only when BUFFER was shown in the selected frame. */
1723 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1725 doc
: /* Move BUFFER to the end of the buffer list. */)
1726 (Lisp_Object buffer
)
1728 Lisp_Object aelt
, aelt_cons
, tem
;
1729 register struct frame
*f
= XFRAME (selected_frame
);
1731 CHECK_BUFFER (buffer
);
1733 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1734 Don't allow quitting since this might leave the buffer list in an
1735 inconsistent state. */
1736 tem
= Vinhibit_quit
;
1738 aelt
= Frassq (buffer
, Vbuffer_alist
);
1739 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1740 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1741 XSETCDR (aelt_cons
, Qnil
);
1742 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1743 Vinhibit_quit
= tem
;
1745 /* Update buffer lists of selected frame. */
1746 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1747 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1749 /* Run buffer-list-update-hook. */
1750 if (!NILP (Vrun_hooks
))
1751 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1756 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1757 doc
: /* Set an appropriate major mode for BUFFER.
1758 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1759 according to `default-major-mode'.
1760 Use this function before selecting the buffer, since it may need to inspect
1761 the current buffer's major mode. */)
1762 (Lisp_Object buffer
)
1765 Lisp_Object function
;
1767 CHECK_BUFFER (buffer
);
1769 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1770 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1771 function
= find_symbol_value (intern ("initial-major-mode"));
1774 function
= BVAR (&buffer_defaults
, major_mode
);
1776 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1777 function
= BVAR (current_buffer
, major_mode
);
1780 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1783 count
= SPECPDL_INDEX ();
1785 /* To select a nonfundamental mode,
1786 select the buffer temporarily and then call the mode function. */
1788 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1790 Fset_buffer (buffer
);
1793 return unbind_to (count
, Qnil
);
1796 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1797 doc
: /* Return the current buffer as a Lisp object. */)
1800 register Lisp_Object buf
;
1801 XSETBUFFER (buf
, current_buffer
);
1805 /* Set the current buffer to B.
1807 We previously set windows_or_buffers_changed here to invalidate
1808 global unchanged information in beg_unchanged and end_unchanged.
1809 This is no longer necessary because we now compute unchanged
1810 information on a buffer-basis. Every action affecting other
1811 windows than the selected one requires a select_window at some
1812 time, and that increments windows_or_buffers_changed. */
1815 set_buffer_internal (register struct buffer
*b
)
1817 if (current_buffer
!= b
)
1818 set_buffer_internal_1 (b
);
1821 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1822 This is used by redisplay. */
1825 set_buffer_internal_1 (register struct buffer
*b
)
1827 register struct buffer
*old_buf
;
1828 register Lisp_Object tail
;
1830 #ifdef USE_MMAP_FOR_BUFFERS
1831 if (b
->text
->beg
== NULL
)
1832 enlarge_buffer_text (b
, 0);
1833 #endif /* USE_MMAP_FOR_BUFFERS */
1835 if (current_buffer
== b
)
1838 old_buf
= current_buffer
;
1840 last_known_column_point
= -1; /* invalidate indentation cache */
1844 /* Put the undo list back in the base buffer, so that it appears
1845 that an indirect buffer shares the undo list of its base. */
1846 if (old_buf
->base_buffer
)
1847 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1849 /* If the old current buffer has markers to record PT, BEGV and ZV
1850 when it is not current, update them now. */
1851 record_buffer_markers (old_buf
);
1854 /* Get the undo list from the base buffer, so that it appears
1855 that an indirect buffer shares the undo list of its base. */
1857 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1859 /* If the new current buffer has markers to record PT, BEGV and ZV
1860 when it is not current, fetch them now. */
1861 fetch_buffer_markers (b
);
1863 /* Look down buffer's list of local Lisp variables
1864 to find and update any that forward into C variables. */
1868 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1870 Lisp_Object var
= XCAR (XCAR (tail
));
1871 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1872 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1873 && SYMBOL_BLV (sym
)->fwd
)
1874 /* Just reference the variable
1875 to cause it to become set for this buffer. */
1876 Fsymbol_value (var
);
1879 /* Do the same with any others that were local to the previous buffer */
1880 while (b
!= old_buf
&& (b
= old_buf
, b
));
1883 /* Switch to buffer B temporarily for redisplay purposes.
1884 This avoids certain things that don't need to be done within redisplay. */
1887 set_buffer_temp (struct buffer
*b
)
1889 register struct buffer
*old_buf
;
1891 if (current_buffer
== b
)
1894 old_buf
= current_buffer
;
1897 /* If the old current buffer has markers to record PT, BEGV and ZV
1898 when it is not current, update them now. */
1899 record_buffer_markers (old_buf
);
1901 /* If the new current buffer has markers to record PT, BEGV and ZV
1902 when it is not current, fetch them now. */
1903 fetch_buffer_markers (b
);
1906 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1907 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1908 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1909 also `save-excursion' when you want to make a buffer current
1910 temporarily. This function does not display the buffer, so its effect
1911 ends when the current command terminates. Use `switch-to-buffer' or
1912 `pop-to-buffer' to switch buffers permanently. */)
1913 (register Lisp_Object buffer_or_name
)
1915 register Lisp_Object buffer
;
1916 buffer
= Fget_buffer (buffer_or_name
);
1918 nsberror (buffer_or_name
);
1919 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1920 error ("Selecting deleted buffer");
1921 set_buffer_internal (XBUFFER (buffer
));
1925 /* Set the current buffer to BUFFER provided it is alive. */
1928 set_buffer_if_live (Lisp_Object buffer
)
1930 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1931 Fset_buffer (buffer
);
1935 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1936 Sbarf_if_buffer_read_only
, 0, 0, 0,
1937 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1940 if (!NILP (BVAR (current_buffer
, read_only
))
1941 && NILP (Vinhibit_read_only
))
1942 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1946 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1947 doc
: /* Delete the entire contents of the current buffer.
1948 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1949 so the buffer is truly empty after this. */)
1956 current_buffer
->last_window_start
= 1;
1957 /* Prevent warnings, or suspension of auto saving, that would happen
1958 if future size is less than past size. Use of erase-buffer
1959 implies that the future text is not really related to the past text. */
1960 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1965 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1967 CHECK_NUMBER_COERCE_MARKER (*b
);
1968 CHECK_NUMBER_COERCE_MARKER (*e
);
1970 if (XINT (*b
) > XINT (*e
))
1973 tem
= *b
; *b
= *e
; *e
= tem
;
1976 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1977 && XINT (*e
) <= ZV
))
1978 args_out_of_range (*b
, *e
);
1981 /* Advance BYTE_POS up to a character boundary
1982 and return the adjusted position. */
1985 advance_to_char_boundary (EMACS_INT byte_pos
)
1989 if (byte_pos
== BEG
)
1990 /* Beginning of buffer is always a character boundary. */
1993 c
= FETCH_BYTE (byte_pos
);
1994 if (! CHAR_HEAD_P (c
))
1996 /* We should advance BYTE_POS only when C is a constituent of a
1997 multibyte sequence. */
1998 EMACS_INT orig_byte_pos
= byte_pos
;
2003 c
= FETCH_BYTE (byte_pos
);
2005 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2007 if (byte_pos
< orig_byte_pos
)
2008 byte_pos
= orig_byte_pos
;
2009 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2010 surely advance to the correct character boundary. If C is
2011 not, BYTE_POS was unchanged. */
2018 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2019 #endif /* REL_ALLOC */
2021 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2023 doc
: /* Swap the text between current buffer and BUFFER. */)
2024 (Lisp_Object buffer
)
2026 struct buffer
*other_buffer
;
2027 CHECK_BUFFER (buffer
);
2028 other_buffer
= XBUFFER (buffer
);
2030 if (NILP (BVAR (other_buffer
, name
)))
2031 error ("Cannot swap a dead buffer's text");
2033 /* Actually, it probably works just fine.
2034 * if (other_buffer == current_buffer)
2035 * error ("Cannot swap a buffer's text with itself"); */
2037 /* Actually, this may be workable as well, tho probably only if they're
2039 if (other_buffer
->base_buffer
2040 || current_buffer
->base_buffer
)
2041 error ("Cannot swap indirect buffers's text");
2043 { /* This is probably harder to make work. */
2044 struct buffer
*other
;
2045 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2046 if (other
->base_buffer
== other_buffer
2047 || other
->base_buffer
== current_buffer
)
2048 error ("One of the buffers to swap has indirect buffers");
2051 #define swapfield(field, type) \
2053 type tmp##field = other_buffer->field; \
2054 other_buffer->field = current_buffer->field; \
2055 current_buffer->field = tmp##field; \
2057 #define swapfield_(field, type) \
2059 type tmp##field = BVAR (other_buffer, field); \
2060 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2061 BVAR (current_buffer, field) = tmp##field; \
2064 swapfield (own_text
, struct buffer_text
);
2065 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2066 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2068 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2069 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2070 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2071 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2072 #endif /* REL_ALLOC */
2074 swapfield (pt
, EMACS_INT
);
2075 swapfield (pt_byte
, EMACS_INT
);
2076 swapfield (begv
, EMACS_INT
);
2077 swapfield (begv_byte
, EMACS_INT
);
2078 swapfield (zv
, EMACS_INT
);
2079 swapfield (zv_byte
, EMACS_INT
);
2080 eassert (!current_buffer
->base_buffer
);
2081 eassert (!other_buffer
->base_buffer
);
2082 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2083 swapfield (newline_cache
, struct region_cache
*);
2084 swapfield (width_run_cache
, struct region_cache
*);
2085 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2086 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2087 swapfield (overlays_before
, struct Lisp_Overlay
*);
2088 swapfield (overlays_after
, struct Lisp_Overlay
*);
2089 swapfield (overlay_center
, EMACS_INT
);
2090 swapfield_ (undo_list
, Lisp_Object
);
2091 swapfield_ (mark
, Lisp_Object
);
2092 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2093 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2094 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2095 /* FIXME: Not sure what we should do with these *_marker fields.
2096 Hopefully they're just nil anyway. */
2097 swapfield_ (pt_marker
, Lisp_Object
);
2098 swapfield_ (begv_marker
, Lisp_Object
);
2099 swapfield_ (zv_marker
, Lisp_Object
);
2100 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2101 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2103 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2104 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2105 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2106 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2107 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2108 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2109 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2111 struct Lisp_Marker
*m
;
2112 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2113 if (m
->buffer
== other_buffer
)
2114 m
->buffer
= current_buffer
;
2116 /* Since there's no indirect buffer in sight, markers on
2117 BUF_MARKERS(buf) should either be for `buf' or dead. */
2118 eassert (!m
->buffer
);
2119 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2120 if (m
->buffer
== current_buffer
)
2121 m
->buffer
= other_buffer
;
2123 /* Since there's no indirect buffer in sight, markers on
2124 BUF_MARKERS(buf) should either be for `buf' or dead. */
2125 eassert (!m
->buffer
);
2127 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2128 So since we just swapped the markers between the two buffers, we need
2129 to undo the effect of this swap for window markers. */
2130 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2131 Lisp_Object buf1
, buf2
;
2132 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2134 while (NILP (Fmemq (w
, ws
)))
2137 if (MARKERP (XWINDOW (w
)->pointm
)
2138 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2139 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2140 Fset_marker (XWINDOW (w
)->pointm
,
2141 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2142 XWINDOW (w
)->buffer
);
2143 w
= Fnext_window (w
, Qt
, Qt
);
2147 if (current_buffer
->text
->intervals
)
2148 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2149 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2150 if (other_buffer
->text
->intervals
)
2151 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2152 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2157 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2159 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2160 If FLAG is t, this makes the buffer a multibyte buffer.
2161 If FLAG is nil, this makes the buffer a single-byte buffer.
2162 In these cases, the buffer contents remain unchanged as a sequence of
2163 bytes but the contents viewed as characters do change.
2164 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2165 all eight-bit bytes to eight-bit characters.
2166 If the multibyte flag was really changed, undo information of the
2167 current buffer is cleared. */)
2170 struct Lisp_Marker
*tail
, *markers
;
2171 struct buffer
*other
;
2173 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2174 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2175 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2176 struct gcpro gcpro1
;
2178 if (current_buffer
->base_buffer
)
2179 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2181 /* Do nothing if nothing actually changes. */
2182 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2187 /* Don't record these buffer changes. We will put a special undo entry
2189 BVAR (current_buffer
, undo_list
) = Qt
;
2191 /* If the cached position is for this buffer, clear it out. */
2192 clear_charpos_cache (current_buffer
);
2195 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2197 begv
= BEGV
, zv
= ZV
;
2204 EMACS_INT pos
, stop
;
2207 /* Do this first, so it can use CHAR_TO_BYTE
2208 to calculate the old correspondences. */
2209 set_intervals_multibyte (0);
2211 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2217 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2220 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2221 tail
->charpos
= tail
->bytepos
;
2223 /* Convert multibyte form of 8-bit characters to unibyte. */
2238 if (ASCII_BYTE_P (*p
))
2240 else if (CHAR_BYTE8_HEAD_P (*p
))
2242 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2243 /* Delete all bytes for this 8-bit character but the
2244 last one, and change the last one to the character
2247 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2259 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2260 p
+= bytes
, pos
+= bytes
;
2264 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2269 EMACS_INT pos
, stop
;
2270 unsigned char *p
, *pend
;
2272 /* Be sure not to have a multibyte sequence striding over the GAP.
2273 Ex: We change this: "...abc\302 _GAP_ \241def..."
2274 to: "...abc _GAP_ \302\241def..." */
2277 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2278 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2280 unsigned char *q
= GPT_ADDR
- 1;
2282 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2283 if (LEADING_CODE_P (*q
))
2285 EMACS_INT new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2287 move_gap_both (new_gpt
, new_gpt
);
2291 /* Make the buffer contents valid as multibyte by converting
2292 8-bit characters to multibyte form. */
2310 if (ASCII_BYTE_P (*p
))
2312 else if (EQ (flag
, Qt
)
2313 && ! CHAR_BYTE8_HEAD_P (*p
)
2314 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2315 p
+= bytes
, pos
+= bytes
;
2318 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2321 c
= BYTE8_TO_CHAR (*p
);
2322 bytes
= CHAR_STRING (c
, tmp
);
2324 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2326 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2327 /* Now the gap is after the just inserted data. */
2345 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2347 /* Do this first, so that chars_in_text asks the right question.
2348 set_intervals_multibyte needs it too. */
2349 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2351 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2352 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2354 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2356 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2357 if (BEGV_BYTE
> GPT_BYTE
)
2358 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2360 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2362 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2363 if (ZV_BYTE
> GPT_BYTE
)
2364 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2366 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2369 EMACS_INT byte
= advance_to_char_boundary (PT_BYTE
);
2372 if (byte
> GPT_BYTE
)
2373 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2375 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2376 TEMP_SET_PT_BOTH (position
, byte
);
2379 tail
= markers
= BUF_MARKERS (current_buffer
);
2381 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2382 getting confused by the markers that have not yet been updated.
2383 It is also a signal that it should never create a marker. */
2384 BUF_MARKERS (current_buffer
) = NULL
;
2386 for (; tail
; tail
= tail
->next
)
2388 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2389 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2392 /* Make sure no markers were put on the chain
2393 while the chain value was incorrect. */
2394 if (BUF_MARKERS (current_buffer
))
2397 BUF_MARKERS (current_buffer
) = markers
;
2399 /* Do this last, so it can calculate the new correspondences
2400 between chars and bytes. */
2401 set_intervals_multibyte (1);
2404 if (!EQ (old_undo
, Qt
))
2406 /* Represent all the above changes by a special undo entry. */
2407 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2408 intern ("set-buffer-multibyte"),
2409 NILP (flag
) ? Qt
: Qnil
),
2415 /* Changing the multibyteness of a buffer means that all windows
2416 showing that buffer must be updated thoroughly. */
2417 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2418 ++windows_or_buffers_changed
;
2420 /* Copy this buffer's new multibyte status
2421 into all of its indirect buffers. */
2422 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2423 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2425 BVAR (other
, enable_multibyte_characters
)
2426 = BVAR (current_buffer
, enable_multibyte_characters
);
2427 other
->prevent_redisplay_optimizations_p
= 1;
2430 /* Restore the modifiedness of the buffer. */
2431 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2432 Fset_buffer_modified_p (Qnil
);
2434 /* Update coding systems of this buffer's process (if any). */
2436 Lisp_Object process
;
2438 process
= Fget_buffer_process (Fcurrent_buffer ());
2439 if (PROCESSP (process
))
2440 setup_process_coding_systems (process
);
2446 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2447 Skill_all_local_variables
, 0, 0, 0,
2448 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2449 Most local variable bindings are eliminated so that the default values
2450 become effective once more. Also, the syntax table is set from
2451 `standard-syntax-table', the local keymap is set to nil,
2452 and the abbrev table from `fundamental-mode-abbrev-table'.
2453 This function also forces redisplay of the mode line.
2455 Every function to select a new major mode starts by
2456 calling this function.
2458 As a special exception, local variables whose names have
2459 a non-nil `permanent-local' property are not eliminated by this function.
2461 The first thing this function does is run
2462 the normal hook `change-major-mode-hook'. */)
2465 Frun_hooks (1, &Qchange_major_mode_hook
);
2467 /* Make sure none of the bindings in local_var_alist
2468 remain swapped in, in their symbols. */
2470 swap_out_buffer_local_variables (current_buffer
);
2472 /* Actually eliminate all local bindings of this buffer. */
2474 reset_buffer_local_variables (current_buffer
, 0);
2476 /* Force mode-line redisplay. Useful here because all major mode
2477 commands call this function. */
2478 update_mode_lines
++;
2483 /* Make sure no local variables remain set up with buffer B
2484 for their current values. */
2487 swap_out_buffer_local_variables (struct buffer
*b
)
2489 Lisp_Object oalist
, alist
, buffer
;
2491 XSETBUFFER (buffer
, b
);
2492 oalist
= BVAR (b
, local_var_alist
);
2494 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2496 Lisp_Object sym
= XCAR (XCAR (alist
));
2497 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2498 /* Need not do anything if some other buffer's binding is
2500 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2502 /* Symbol is set up for this buffer's old local value:
2504 swap_in_global_binding (XSYMBOL (sym
));
2509 /* Find all the overlays in the current buffer that contain position POS.
2510 Return the number found, and store them in a vector in *VEC_PTR.
2511 Store in *LEN_PTR the size allocated for the vector.
2512 Store in *NEXT_PTR the next position after POS where an overlay starts,
2513 or ZV if there are no more overlays between POS and ZV.
2514 Store in *PREV_PTR the previous position before POS where an overlay ends,
2515 or where an overlay starts which ends at or after POS;
2516 or BEGV if there are no such overlays from BEGV to POS.
2517 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2519 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2520 when this function is called.
2522 If EXTEND is non-zero, we make the vector bigger if necessary.
2523 If EXTEND is zero, we never extend the vector,
2524 and we store only as many overlays as will fit.
2525 But we still return the total number of overlays.
2527 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2528 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2529 default (BEGV or ZV). */
2532 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2534 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
, int change_req
)
2536 Lisp_Object overlay
, start
, end
;
2537 struct Lisp_Overlay
*tail
;
2539 ptrdiff_t len
= *len_ptr
;
2540 Lisp_Object
*vec
= *vec_ptr
;
2541 EMACS_INT next
= ZV
;
2542 EMACS_INT prev
= BEGV
;
2543 int inhibit_storing
= 0;
2545 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2547 EMACS_INT startpos
, endpos
;
2549 XSETMISC (overlay
, tail
);
2551 start
= OVERLAY_START (overlay
);
2552 end
= OVERLAY_END (overlay
);
2553 endpos
= OVERLAY_POSITION (end
);
2560 startpos
= OVERLAY_POSITION (start
);
2561 /* This one ends at or after POS
2562 so its start counts for PREV_PTR if it's before POS. */
2563 if (prev
< startpos
&& startpos
< pos
)
2567 if (startpos
<= pos
)
2571 /* The supplied vector is full.
2572 Either make it bigger, or don't store any more in it. */
2575 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2581 inhibit_storing
= 1;
2584 if (!inhibit_storing
)
2586 /* Keep counting overlays even if we can't return them all. */
2589 else if (startpos
< next
)
2593 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2595 EMACS_INT startpos
, endpos
;
2597 XSETMISC (overlay
, tail
);
2599 start
= OVERLAY_START (overlay
);
2600 end
= OVERLAY_END (overlay
);
2601 startpos
= OVERLAY_POSITION (start
);
2604 if (startpos
< next
)
2608 endpos
= OVERLAY_POSITION (end
);
2615 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2621 inhibit_storing
= 1;
2624 if (!inhibit_storing
)
2628 if (startpos
< pos
&& startpos
> prev
)
2631 else if (endpos
< pos
&& endpos
> prev
)
2633 else if (endpos
== pos
&& startpos
> prev
2634 && (!change_req
|| startpos
< pos
))
2645 /* Find all the overlays in the current buffer that overlap the range
2646 BEG-END, or are empty at BEG, or are empty at END provided END
2647 denotes the position at the end of the current buffer.
2649 Return the number found, and store them in a vector in *VEC_PTR.
2650 Store in *LEN_PTR the size allocated for the vector.
2651 Store in *NEXT_PTR the next position after POS where an overlay starts,
2652 or ZV if there are no more overlays.
2653 Store in *PREV_PTR the previous position before POS where an overlay ends,
2654 or BEGV if there are no previous overlays.
2655 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2657 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2658 when this function is called.
2660 If EXTEND is non-zero, we make the vector bigger if necessary.
2661 If EXTEND is zero, we never extend the vector,
2662 and we store only as many overlays as will fit.
2663 But we still return the total number of overlays. */
2666 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2667 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2668 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
)
2670 Lisp_Object overlay
, ostart
, oend
;
2671 struct Lisp_Overlay
*tail
;
2673 ptrdiff_t len
= *len_ptr
;
2674 Lisp_Object
*vec
= *vec_ptr
;
2675 EMACS_INT next
= ZV
;
2676 EMACS_INT prev
= BEGV
;
2677 int inhibit_storing
= 0;
2678 int end_is_Z
= end
== Z
;
2680 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2682 EMACS_INT startpos
, endpos
;
2684 XSETMISC (overlay
, tail
);
2686 ostart
= OVERLAY_START (overlay
);
2687 oend
= OVERLAY_END (overlay
);
2688 endpos
= OVERLAY_POSITION (oend
);
2695 startpos
= OVERLAY_POSITION (ostart
);
2696 /* Count an interval if it overlaps the range, is empty at the
2697 start of the range, or is empty at END provided END denotes the
2698 end of the buffer. */
2699 if ((beg
< endpos
&& startpos
< end
)
2700 || (startpos
== endpos
2701 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2705 /* The supplied vector is full.
2706 Either make it bigger, or don't store any more in it. */
2709 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2715 inhibit_storing
= 1;
2718 if (!inhibit_storing
)
2720 /* Keep counting overlays even if we can't return them all. */
2723 else if (startpos
< next
)
2727 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2729 EMACS_INT startpos
, endpos
;
2731 XSETMISC (overlay
, tail
);
2733 ostart
= OVERLAY_START (overlay
);
2734 oend
= OVERLAY_END (overlay
);
2735 startpos
= OVERLAY_POSITION (ostart
);
2738 if (startpos
< next
)
2742 endpos
= OVERLAY_POSITION (oend
);
2743 /* Count an interval if it overlaps the range, is empty at the
2744 start of the range, or is empty at END provided END denotes the
2745 end of the buffer. */
2746 if ((beg
< endpos
&& startpos
< end
)
2747 || (startpos
== endpos
2748 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2754 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2760 inhibit_storing
= 1;
2763 if (!inhibit_storing
)
2767 else if (endpos
< beg
&& endpos
> prev
)
2779 /* Return non-zero if there exists an overlay with a non-nil
2780 `mouse-face' property overlapping OVERLAY. */
2783 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2785 EMACS_INT start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2786 EMACS_INT end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2787 ptrdiff_t n
, i
, size
;
2788 Lisp_Object
*v
, tem
;
2791 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2792 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2795 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2796 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2799 for (i
= 0; i
< n
; ++i
)
2800 if (!EQ (v
[i
], overlay
)
2801 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2810 /* Fast function to just test if we're at an overlay boundary. */
2812 overlay_touches_p (EMACS_INT pos
)
2814 Lisp_Object overlay
;
2815 struct Lisp_Overlay
*tail
;
2817 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2821 XSETMISC (overlay
,tail
);
2822 if (!OVERLAYP (overlay
))
2825 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2828 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2832 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2836 XSETMISC (overlay
, tail
);
2837 if (!OVERLAYP (overlay
))
2840 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2843 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2851 Lisp_Object overlay
;
2857 compare_overlays (const void *v1
, const void *v2
)
2859 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2860 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2861 if (s1
->priority
!= s2
->priority
)
2862 return s1
->priority
< s2
->priority
? -1 : 1;
2863 if (s1
->beg
!= s2
->beg
)
2864 return s1
->beg
< s2
->beg
? -1 : 1;
2865 if (s1
->end
!= s2
->end
)
2866 return s2
->end
< s1
->end
? -1 : 1;
2867 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2868 between "equal" overlays. The result can still change between
2869 invocations of Emacs, but it won't change in the middle of
2870 `find_field' (bug#6830). */
2871 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2872 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2876 /* Sort an array of overlays by priority. The array is modified in place.
2877 The return value is the new size; this may be smaller than the original
2878 size if some of the overlays were invalid or were window-specific. */
2880 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2883 struct sortvec
*sortvec
;
2884 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2886 /* Put the valid and relevant overlays into sortvec. */
2888 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2891 Lisp_Object overlay
;
2893 overlay
= overlay_vec
[i
];
2894 if (OVERLAY_VALID (overlay
)
2895 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2896 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2898 /* If we're interested in a specific window, then ignore
2899 overlays that are limited to some other window. */
2904 window
= Foverlay_get (overlay
, Qwindow
);
2905 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2909 /* This overlay is good and counts: put it into sortvec. */
2910 sortvec
[j
].overlay
= overlay
;
2911 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2912 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2913 tem
= Foverlay_get (overlay
, Qpriority
);
2915 sortvec
[j
].priority
= XINT (tem
);
2917 sortvec
[j
].priority
= 0;
2923 /* Sort the overlays into the proper order: increasing priority. */
2926 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2928 for (i
= 0; i
< noverlays
; i
++)
2929 overlay_vec
[i
] = sortvec
[i
].overlay
;
2935 Lisp_Object string
, string2
;
2942 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2943 ptrdiff_t size
; /* Allocated length of that array. */
2944 ptrdiff_t used
; /* How much of the array is currently in use. */
2945 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2948 /* Buffers for storing information about the overlays touching a given
2949 position. These could be automatic variables in overlay_strings, but
2950 it's more efficient to hold onto the memory instead of repeatedly
2951 allocating and freeing it. */
2952 static struct sortstrlist overlay_heads
, overlay_tails
;
2953 static unsigned char *overlay_str_buf
;
2955 /* Allocated length of overlay_str_buf. */
2956 static ptrdiff_t overlay_str_len
;
2958 /* A comparison function suitable for passing to qsort. */
2960 cmp_for_strings (const void *as1
, const void *as2
)
2962 struct sortstr
*s1
= (struct sortstr
*)as1
;
2963 struct sortstr
*s2
= (struct sortstr
*)as2
;
2964 if (s1
->size
!= s2
->size
)
2965 return s2
->size
< s1
->size
? -1 : 1;
2966 if (s1
->priority
!= s2
->priority
)
2967 return s1
->priority
< s2
->priority
? -1 : 1;
2972 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2973 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2977 if (ssl
->used
== ssl
->size
)
2978 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2979 ssl
->buf
[ssl
->used
].string
= str
;
2980 ssl
->buf
[ssl
->used
].string2
= str2
;
2981 ssl
->buf
[ssl
->used
].size
= size
;
2982 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2985 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2986 nbytes
= SCHARS (str
);
2987 else if (! STRING_MULTIBYTE (str
))
2988 nbytes
= count_size_as_multibyte (SDATA (str
),
2991 nbytes
= SBYTES (str
);
2993 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2994 memory_full (SIZE_MAX
);
2995 ssl
->bytes
+= nbytes
;
2999 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3000 nbytes
= SCHARS (str2
);
3001 else if (! STRING_MULTIBYTE (str2
))
3002 nbytes
= count_size_as_multibyte (SDATA (str2
),
3005 nbytes
= SBYTES (str2
);
3007 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3008 memory_full (SIZE_MAX
);
3009 ssl
->bytes
+= nbytes
;
3013 /* Return the concatenation of the strings associated with overlays that
3014 begin or end at POS, ignoring overlays that are specific to a window
3015 other than W. The strings are concatenated in the appropriate order:
3016 shorter overlays nest inside longer ones, and higher priority inside
3017 lower. Normally all of the after-strings come first, but zero-sized
3018 overlays have their after-strings ride along with the before-strings
3019 because it would look strange to print them inside-out.
3021 Returns the string length, and stores the contents indirectly through
3022 PSTR, if that variable is non-null. The string may be overwritten by
3023 subsequent calls. */
3026 overlay_strings (EMACS_INT pos
, struct window
*w
, unsigned char **pstr
)
3028 Lisp_Object overlay
, window
, str
;
3029 struct Lisp_Overlay
*ov
;
3030 EMACS_INT startpos
, endpos
;
3031 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3033 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3034 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3035 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3037 XSETMISC (overlay
, ov
);
3038 eassert (OVERLAYP (overlay
));
3040 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3041 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3044 if (endpos
!= pos
&& startpos
!= pos
)
3046 window
= Foverlay_get (overlay
, Qwindow
);
3047 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3050 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3051 record_overlay_string (&overlay_heads
, str
,
3053 ? Foverlay_get (overlay
, Qafter_string
)
3055 Foverlay_get (overlay
, Qpriority
),
3057 else if (endpos
== pos
3058 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3059 record_overlay_string (&overlay_tails
, str
, Qnil
,
3060 Foverlay_get (overlay
, Qpriority
),
3063 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3065 XSETMISC (overlay
, ov
);
3066 eassert (OVERLAYP (overlay
));
3068 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3069 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3072 if (endpos
!= pos
&& startpos
!= pos
)
3074 window
= Foverlay_get (overlay
, Qwindow
);
3075 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3078 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3079 record_overlay_string (&overlay_heads
, str
,
3081 ? Foverlay_get (overlay
, Qafter_string
)
3083 Foverlay_get (overlay
, Qpriority
),
3085 else if (endpos
== pos
3086 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3087 record_overlay_string (&overlay_tails
, str
, Qnil
,
3088 Foverlay_get (overlay
, Qpriority
),
3091 if (overlay_tails
.used
> 1)
3092 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3094 if (overlay_heads
.used
> 1)
3095 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3097 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3104 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3105 memory_full (SIZE_MAX
);
3106 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3107 if (total
> overlay_str_len
)
3108 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3109 total
- overlay_str_len
, -1, 1);
3111 p
= overlay_str_buf
;
3112 for (i
= overlay_tails
.used
; --i
>= 0;)
3115 tem
= overlay_tails
.buf
[i
].string
;
3116 nbytes
= copy_text (SDATA (tem
), p
,
3118 STRING_MULTIBYTE (tem
), multibyte
);
3121 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3124 tem
= overlay_heads
.buf
[i
].string
;
3125 nbytes
= copy_text (SDATA (tem
), p
,
3127 STRING_MULTIBYTE (tem
), multibyte
);
3129 tem
= overlay_heads
.buf
[i
].string2
;
3132 nbytes
= copy_text (SDATA (tem
), p
,
3134 STRING_MULTIBYTE (tem
), multibyte
);
3138 if (p
!= overlay_str_buf
+ total
)
3141 *pstr
= overlay_str_buf
;
3147 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3150 recenter_overlay_lists (struct buffer
*buf
, EMACS_INT pos
)
3152 Lisp_Object overlay
, beg
, end
;
3153 struct Lisp_Overlay
*prev
, *tail
, *next
;
3155 /* See if anything in overlays_before should move to overlays_after. */
3157 /* We don't strictly need prev in this loop; it should always be nil.
3158 But we use it for symmetry and in case that should cease to be true
3159 with some future change. */
3161 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3164 XSETMISC (overlay
, tail
);
3166 /* If the overlay is not valid, get rid of it. */
3167 if (!OVERLAY_VALID (overlay
))
3172 /* Splice the cons cell TAIL out of overlays_before. */
3176 buf
->overlays_before
= next
;
3182 beg
= OVERLAY_START (overlay
);
3183 end
= OVERLAY_END (overlay
);
3185 if (OVERLAY_POSITION (end
) > pos
)
3187 /* OVERLAY needs to be moved. */
3188 EMACS_INT where
= OVERLAY_POSITION (beg
);
3189 struct Lisp_Overlay
*other
, *other_prev
;
3191 /* Splice the cons cell TAIL out of overlays_before. */
3195 buf
->overlays_before
= next
;
3197 /* Search thru overlays_after for where to put it. */
3199 for (other
= buf
->overlays_after
; other
;
3200 other_prev
= other
, other
= other
->next
)
3202 Lisp_Object otherbeg
, otheroverlay
;
3204 XSETMISC (otheroverlay
, other
);
3205 eassert (OVERLAY_VALID (otheroverlay
));
3207 otherbeg
= OVERLAY_START (otheroverlay
);
3208 if (OVERLAY_POSITION (otherbeg
) >= where
)
3212 /* Add TAIL to overlays_after before OTHER. */
3215 other_prev
->next
= tail
;
3217 buf
->overlays_after
= tail
;
3221 /* We've reached the things that should stay in overlays_before.
3222 All the rest of overlays_before must end even earlier,
3227 /* See if anything in overlays_after should be in overlays_before. */
3229 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3232 XSETMISC (overlay
, tail
);
3234 /* If the overlay is not valid, get rid of it. */
3235 if (!OVERLAY_VALID (overlay
))
3240 /* Splice the cons cell TAIL out of overlays_after. */
3244 buf
->overlays_after
= next
;
3250 beg
= OVERLAY_START (overlay
);
3251 end
= OVERLAY_END (overlay
);
3253 /* Stop looking, when we know that nothing further
3254 can possibly end before POS. */
3255 if (OVERLAY_POSITION (beg
) > pos
)
3258 if (OVERLAY_POSITION (end
) <= pos
)
3260 /* OVERLAY needs to be moved. */
3261 EMACS_INT where
= OVERLAY_POSITION (end
);
3262 struct Lisp_Overlay
*other
, *other_prev
;
3264 /* Splice the cons cell TAIL out of overlays_after. */
3268 buf
->overlays_after
= next
;
3270 /* Search thru overlays_before for where to put it. */
3272 for (other
= buf
->overlays_before
; other
;
3273 other_prev
= other
, other
= other
->next
)
3275 Lisp_Object otherend
, otheroverlay
;
3277 XSETMISC (otheroverlay
, other
);
3278 eassert (OVERLAY_VALID (otheroverlay
));
3280 otherend
= OVERLAY_END (otheroverlay
);
3281 if (OVERLAY_POSITION (otherend
) <= where
)
3285 /* Add TAIL to overlays_before before OTHER. */
3288 other_prev
->next
= tail
;
3290 buf
->overlays_before
= tail
;
3295 buf
->overlay_center
= pos
;
3299 adjust_overlays_for_insert (EMACS_INT pos
, EMACS_INT length
)
3301 /* After an insertion, the lists are still sorted properly,
3302 but we may need to update the value of the overlay center. */
3303 if (current_buffer
->overlay_center
>= pos
)
3304 current_buffer
->overlay_center
+= length
;
3308 adjust_overlays_for_delete (EMACS_INT pos
, EMACS_INT length
)
3310 if (current_buffer
->overlay_center
< pos
)
3311 /* The deletion was to our right. No change needed; the before- and
3312 after-lists are still consistent. */
3314 else if (current_buffer
->overlay_center
> pos
+ length
)
3315 /* The deletion was to our left. We need to adjust the center value
3316 to account for the change in position, but the lists are consistent
3317 given the new value. */
3318 current_buffer
->overlay_center
-= length
;
3320 /* We're right in the middle. There might be things on the after-list
3321 that now belong on the before-list. Recentering will move them,
3322 and also update the center point. */
3323 recenter_overlay_lists (current_buffer
, pos
);
3326 /* Fix up overlays that were garbled as a result of permuting markers
3327 in the range START through END. Any overlay with at least one
3328 endpoint in this range will need to be unlinked from the overlay
3329 list and reinserted in its proper place.
3330 Such an overlay might even have negative size at this point.
3331 If so, we'll make the overlay empty. */
3333 fix_start_end_in_overlays (register EMACS_INT start
, register EMACS_INT end
)
3335 Lisp_Object overlay
;
3336 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3337 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3338 /* These are either nil, indicating that before_list or after_list
3339 should be assigned, or the cons cell the cdr of which should be
3341 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3342 /* 'Parent', likewise, indicates a cons cell or
3343 current_buffer->overlays_before or overlays_after, depending
3344 which loop we're in. */
3345 struct Lisp_Overlay
*tail
, *parent
;
3346 EMACS_INT startpos
, endpos
;
3348 /* This algorithm shifts links around instead of consing and GCing.
3349 The loop invariant is that before_list (resp. after_list) is a
3350 well-formed list except that its last element, the CDR of beforep
3351 (resp. afterp) if beforep (afterp) isn't nil or before_list
3352 (after_list) if it is, is still uninitialized. So it's not a bug
3353 that before_list isn't initialized, although it may look
3355 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3357 XSETMISC (overlay
, tail
);
3359 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3360 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3362 /* If the overlay is backwards, make it empty. */
3363 if (endpos
< startpos
)
3366 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3374 || (startpos
>= start
&& startpos
< end
))
3376 /* Add it to the end of the wrong list. Later on,
3377 recenter_overlay_lists will move it to the right place. */
3378 if (endpos
< current_buffer
->overlay_center
)
3383 afterp
->next
= tail
;
3391 beforep
->next
= tail
;
3395 current_buffer
->overlays_before
= tail
->next
;
3397 parent
->next
= tail
->next
;
3401 parent
= tail
, tail
= parent
->next
;
3403 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3405 XSETMISC (overlay
, tail
);
3407 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3408 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3410 /* If the overlay is backwards, make it empty. */
3411 if (endpos
< startpos
)
3414 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3418 if (startpos
>= end
)
3421 if (startpos
>= start
3422 || (endpos
>= start
&& endpos
< end
))
3424 if (endpos
< current_buffer
->overlay_center
)
3429 afterp
->next
= tail
;
3437 beforep
->next
= tail
;
3441 current_buffer
->overlays_after
= tail
->next
;
3443 parent
->next
= tail
->next
;
3447 parent
= tail
, tail
= parent
->next
;
3450 /* Splice the constructed (wrong) lists into the buffer's lists,
3451 and let the recenter function make it sane again. */
3454 beforep
->next
= current_buffer
->overlays_before
;
3455 current_buffer
->overlays_before
= before_list
;
3457 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3461 afterp
->next
= current_buffer
->overlays_after
;
3462 current_buffer
->overlays_after
= after_list
;
3464 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3467 /* We have two types of overlay: the one whose ending marker is
3468 after-insertion-marker (this is the usual case) and the one whose
3469 ending marker is before-insertion-marker. When `overlays_before'
3470 contains overlays of the latter type and the former type in this
3471 order and both overlays end at inserting position, inserting a text
3472 increases only the ending marker of the latter type, which results
3473 in incorrect ordering of `overlays_before'.
3475 This function fixes ordering of overlays in the slot
3476 `overlays_before' of the buffer *BP. Before the insertion, `point'
3477 was at PREV, and now is at POS. */
3480 fix_overlays_before (struct buffer
*bp
, EMACS_INT prev
, EMACS_INT pos
)
3482 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3483 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3485 EMACS_INT end
IF_LINT (= 0);
3487 /* After the insertion, the several overlays may be in incorrect
3488 order. The possibility is that, in the list `overlays_before',
3489 an overlay which ends at POS appears after an overlay which ends
3490 at PREV. Since POS is greater than PREV, we must fix the
3491 ordering of these overlays, by moving overlays ends at POS before
3492 the overlays ends at PREV. */
3494 /* At first, find a place where disordered overlays should be linked
3495 in. It is where an overlay which end before POS exists. (i.e. an
3496 overlay whose ending marker is after-insertion-marker if disorder
3499 && (XSETMISC (tem
, tail
),
3500 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3506 /* If we don't find such an overlay,
3507 or the found one ends before PREV,
3508 or the found one is the last one in the list,
3509 we don't have to fix anything. */
3510 if (!tail
|| end
< prev
|| !tail
->next
)
3513 right_pair
= parent
;
3517 /* Now, end position of overlays in the list TAIL should be before
3518 or equal to PREV. In the loop, an overlay which ends at POS is
3519 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3520 we found an overlay which ends before PREV, the remaining
3521 overlays are in correct order. */
3524 XSETMISC (tem
, tail
);
3525 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3528 { /* This overlay is disordered. */
3529 struct Lisp_Overlay
*found
= tail
;
3531 /* Unlink the found overlay. */
3533 parent
->next
= tail
;
3534 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3535 and link it into the right place. */
3538 found
->next
= bp
->overlays_before
;
3539 bp
->overlays_before
= found
;
3543 found
->next
= right_pair
->next
;
3544 right_pair
->next
= found
;
3547 else if (end
== prev
)
3552 else /* No more disordered overlay. */
3557 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3558 doc
: /* Return t if OBJECT is an overlay. */)
3559 (Lisp_Object object
)
3561 return (OVERLAYP (object
) ? Qt
: Qnil
);
3564 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3565 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3566 If omitted, BUFFER defaults to the current buffer.
3567 BEG and END may be integers or markers.
3568 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3569 for the front of the overlay advance when text is inserted there
3570 \(which means the text *is not* included in the overlay).
3571 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3572 for the rear of the overlay advance when text is inserted there
3573 \(which means the text *is* included in the overlay). */)
3574 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3576 Lisp_Object overlay
;
3580 XSETBUFFER (buffer
, current_buffer
);
3582 CHECK_BUFFER (buffer
);
3584 && ! EQ (Fmarker_buffer (beg
), buffer
))
3585 error ("Marker points into wrong buffer");
3587 && ! EQ (Fmarker_buffer (end
), buffer
))
3588 error ("Marker points into wrong buffer");
3590 CHECK_NUMBER_COERCE_MARKER (beg
);
3591 CHECK_NUMBER_COERCE_MARKER (end
);
3593 if (XINT (beg
) > XINT (end
))
3596 temp
= beg
; beg
= end
; end
= temp
;
3599 b
= XBUFFER (buffer
);
3601 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3602 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3604 if (!NILP (front_advance
))
3605 XMARKER (beg
)->insertion_type
= 1;
3606 if (!NILP (rear_advance
))
3607 XMARKER (end
)->insertion_type
= 1;
3609 overlay
= allocate_misc ();
3610 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3611 XOVERLAY (overlay
)->start
= beg
;
3612 XOVERLAY (overlay
)->end
= end
;
3613 XOVERLAY (overlay
)->plist
= Qnil
;
3614 XOVERLAY (overlay
)->next
= NULL
;
3616 /* Put the new overlay on the wrong list. */
3617 end
= OVERLAY_END (overlay
);
3618 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3620 if (b
->overlays_after
)
3621 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3622 b
->overlays_after
= XOVERLAY (overlay
);
3626 if (b
->overlays_before
)
3627 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3628 b
->overlays_before
= XOVERLAY (overlay
);
3631 /* This puts it in the right list, and in the right order. */
3632 recenter_overlay_lists (b
, b
->overlay_center
);
3634 /* We don't need to redisplay the region covered by the overlay, because
3635 the overlay has no properties at the moment. */
3640 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3643 modify_overlay (struct buffer
*buf
, EMACS_INT start
, EMACS_INT end
)
3647 EMACS_INT temp
= start
;
3652 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3654 /* If this is a buffer not in the selected window,
3655 we must do other windows. */
3656 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3657 windows_or_buffers_changed
= 1;
3658 /* If multiple windows show this buffer, we must do other windows. */
3659 else if (buffer_shared
> 1)
3660 windows_or_buffers_changed
= 1;
3661 /* If we modify an overlay at the end of the buffer, we cannot
3662 be sure that window end is still valid. */
3663 else if (end
>= ZV
&& start
<= ZV
)
3664 windows_or_buffers_changed
= 1;
3666 ++BUF_OVERLAY_MODIFF (buf
);
3670 static struct Lisp_Overlay
*
3671 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3673 struct Lisp_Overlay
*tmp
, *prev
;
3674 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3678 prev
->next
= tmp
->next
;
3681 overlay
->next
= NULL
;
3687 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3688 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3689 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3690 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3692 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3694 struct buffer
*b
, *ob
;
3695 Lisp_Object obuffer
;
3696 int count
= SPECPDL_INDEX ();
3698 CHECK_OVERLAY (overlay
);
3700 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3702 XSETBUFFER (buffer
, current_buffer
);
3703 CHECK_BUFFER (buffer
);
3706 && ! EQ (Fmarker_buffer (beg
), buffer
))
3707 error ("Marker points into wrong buffer");
3709 && ! EQ (Fmarker_buffer (end
), buffer
))
3710 error ("Marker points into wrong buffer");
3712 CHECK_NUMBER_COERCE_MARKER (beg
);
3713 CHECK_NUMBER_COERCE_MARKER (end
);
3715 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3716 return Fdelete_overlay (overlay
);
3718 if (XINT (beg
) > XINT (end
))
3721 temp
= beg
; beg
= end
; end
= temp
;
3724 specbind (Qinhibit_quit
, Qt
);
3726 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3727 b
= XBUFFER (buffer
);
3728 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3730 /* If the overlay has changed buffers, do a thorough redisplay. */
3731 if (!EQ (buffer
, obuffer
))
3733 /* Redisplay where the overlay was. */
3734 if (!NILP (obuffer
))
3739 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3740 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3742 modify_overlay (ob
, o_beg
, o_end
);
3745 /* Redisplay where the overlay is going to be. */
3746 modify_overlay (b
, XINT (beg
), XINT (end
));
3749 /* Redisplay the area the overlay has just left, or just enclosed. */
3751 EMACS_INT o_beg
, o_end
;
3753 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3754 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3756 if (o_beg
== XINT (beg
))
3757 modify_overlay (b
, o_end
, XINT (end
));
3758 else if (o_end
== XINT (end
))
3759 modify_overlay (b
, o_beg
, XINT (beg
));
3762 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3763 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3764 modify_overlay (b
, o_beg
, o_end
);
3768 if (!NILP (obuffer
))
3771 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3773 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3774 eassert (XOVERLAY (overlay
)->next
== NULL
);
3777 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3778 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3780 /* Put the overlay on the wrong list. */
3781 end
= OVERLAY_END (overlay
);
3782 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3784 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3785 b
->overlays_after
= XOVERLAY (overlay
);
3789 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3790 b
->overlays_before
= XOVERLAY (overlay
);
3793 /* This puts it in the right list, and in the right order. */
3794 recenter_overlay_lists (b
, b
->overlay_center
);
3796 return unbind_to (count
, overlay
);
3799 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3800 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3801 (Lisp_Object overlay
)
3805 int count
= SPECPDL_INDEX ();
3807 CHECK_OVERLAY (overlay
);
3809 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3813 b
= XBUFFER (buffer
);
3814 specbind (Qinhibit_quit
, Qt
);
3816 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3817 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3818 eassert (XOVERLAY (overlay
)->next
== NULL
);
3820 marker_position (OVERLAY_START (overlay
)),
3821 marker_position (OVERLAY_END (overlay
)));
3822 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3823 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3825 /* When deleting an overlay with before or after strings, turn off
3826 display optimizations for the affected buffer, on the basis that
3827 these strings may contain newlines. This is easier to do than to
3828 check for that situation during redisplay. */
3829 if (!windows_or_buffers_changed
3830 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3831 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3832 b
->prevent_redisplay_optimizations_p
= 1;
3834 return unbind_to (count
, Qnil
);
3837 /* Overlay dissection functions. */
3839 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3840 doc
: /* Return the position at which OVERLAY starts. */)
3841 (Lisp_Object overlay
)
3843 CHECK_OVERLAY (overlay
);
3845 return (Fmarker_position (OVERLAY_START (overlay
)));
3848 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3849 doc
: /* Return the position at which OVERLAY ends. */)
3850 (Lisp_Object overlay
)
3852 CHECK_OVERLAY (overlay
);
3854 return (Fmarker_position (OVERLAY_END (overlay
)));
3857 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3858 doc
: /* Return the buffer OVERLAY belongs to.
3859 Return nil if OVERLAY has been deleted. */)
3860 (Lisp_Object overlay
)
3862 CHECK_OVERLAY (overlay
);
3864 return Fmarker_buffer (OVERLAY_START (overlay
));
3867 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3868 doc
: /* Return a list of the properties on OVERLAY.
3869 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3871 (Lisp_Object overlay
)
3873 CHECK_OVERLAY (overlay
);
3875 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3879 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3880 doc
: /* Return a list of the overlays that contain the character at POS. */)
3883 ptrdiff_t len
, noverlays
;
3884 Lisp_Object
*overlay_vec
;
3887 CHECK_NUMBER_COERCE_MARKER (pos
);
3890 /* We can't use alloca here because overlays_at can call xrealloc. */
3891 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3893 /* Put all the overlays we want in a vector in overlay_vec.
3894 Store the length in len. */
3895 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3896 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
3898 /* Make a list of them all. */
3899 result
= Flist (noverlays
, overlay_vec
);
3901 xfree (overlay_vec
);
3905 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3906 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3907 Overlap means that at least one character is contained within the overlay
3908 and also contained within the specified region.
3909 Empty overlays are included in the result if they are located at BEG,
3910 between BEG and END, or at END provided END denotes the position at the
3911 end of the buffer. */)
3912 (Lisp_Object beg
, Lisp_Object end
)
3914 ptrdiff_t len
, noverlays
;
3915 Lisp_Object
*overlay_vec
;
3918 CHECK_NUMBER_COERCE_MARKER (beg
);
3919 CHECK_NUMBER_COERCE_MARKER (end
);
3922 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3924 /* Put all the overlays we want in a vector in overlay_vec.
3925 Store the length in len. */
3926 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3929 /* Make a list of them all. */
3930 result
= Flist (noverlays
, overlay_vec
);
3932 xfree (overlay_vec
);
3936 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3938 doc
: /* Return the next position after POS where an overlay starts or ends.
3939 If there are no overlay boundaries from POS to (point-max),
3940 the value is (point-max). */)
3943 ptrdiff_t i
, len
, noverlays
;
3945 Lisp_Object
*overlay_vec
;
3947 CHECK_NUMBER_COERCE_MARKER (pos
);
3950 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3952 /* Put all the overlays we want in a vector in overlay_vec.
3953 Store the length in len.
3954 endpos gets the position where the next overlay starts. */
3955 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3956 &endpos
, (EMACS_INT
*) 0, 1);
3958 /* If any of these overlays ends before endpos,
3959 use its ending point instead. */
3960 for (i
= 0; i
< noverlays
; i
++)
3965 oend
= OVERLAY_END (overlay_vec
[i
]);
3966 oendpos
= OVERLAY_POSITION (oend
);
3967 if (oendpos
< endpos
)
3971 xfree (overlay_vec
);
3972 return make_number (endpos
);
3975 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3976 Sprevious_overlay_change
, 1, 1, 0,
3977 doc
: /* Return the previous position before POS where an overlay starts or ends.
3978 If there are no overlay boundaries from (point-min) to POS,
3979 the value is (point-min). */)
3983 Lisp_Object
*overlay_vec
;
3986 CHECK_NUMBER_COERCE_MARKER (pos
);
3988 /* At beginning of buffer, we know the answer;
3989 avoid bug subtracting 1 below. */
3990 if (XINT (pos
) == BEGV
)
3994 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3996 /* Put all the overlays we want in a vector in overlay_vec.
3997 Store the length in len.
3998 prevpos gets the position of the previous change. */
3999 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4000 (EMACS_INT
*) 0, &prevpos
, 1);
4002 xfree (overlay_vec
);
4003 return make_number (prevpos
);
4006 /* These functions are for debugging overlays. */
4008 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4009 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4010 The car has all the overlays before the overlay center;
4011 the cdr has all the overlays after the overlay center.
4012 Recentering overlays moves overlays between these lists.
4013 The lists you get are copies, so that changing them has no effect.
4014 However, the overlays you get are the real objects that the buffer uses. */)
4017 struct Lisp_Overlay
*ol
;
4018 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4019 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4022 before
= Fcons (tmp
, before
);
4024 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4027 after
= Fcons (tmp
, after
);
4029 return Fcons (Fnreverse (before
), Fnreverse (after
));
4032 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4033 doc
: /* Recenter the overlays of the current buffer around position POS.
4034 That makes overlay lookup faster for positions near POS (but perhaps slower
4035 for positions far away from POS). */)
4038 CHECK_NUMBER_COERCE_MARKER (pos
);
4040 recenter_overlay_lists (current_buffer
, XINT (pos
));
4044 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4045 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4046 (Lisp_Object overlay
, Lisp_Object prop
)
4048 CHECK_OVERLAY (overlay
);
4049 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4052 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4053 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4054 VALUE will be returned.*/)
4055 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4057 Lisp_Object tail
, buffer
;
4060 CHECK_OVERLAY (overlay
);
4062 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4064 for (tail
= XOVERLAY (overlay
)->plist
;
4065 CONSP (tail
) && CONSP (XCDR (tail
));
4066 tail
= XCDR (XCDR (tail
)))
4067 if (EQ (XCAR (tail
), prop
))
4069 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4070 XSETCAR (XCDR (tail
), value
);
4073 /* It wasn't in the list, so add it to the front. */
4074 changed
= !NILP (value
);
4075 XOVERLAY (overlay
)->plist
4076 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4078 if (! NILP (buffer
))
4081 modify_overlay (XBUFFER (buffer
),
4082 marker_position (OVERLAY_START (overlay
)),
4083 marker_position (OVERLAY_END (overlay
)));
4084 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4085 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4086 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4087 Fdelete_overlay (overlay
);
4093 /* Subroutine of report_overlay_modification. */
4095 /* Lisp vector holding overlay hook functions to call.
4096 Vector elements come in pairs.
4097 Each even-index element is a list of hook functions.
4098 The following odd-index element is the overlay they came from.
4100 Before the buffer change, we fill in this vector
4101 as we call overlay hook functions.
4102 After the buffer change, we get the functions to call from this vector.
4103 This way we always call the same functions before and after the change. */
4104 static Lisp_Object last_overlay_modification_hooks
;
4106 /* Number of elements actually used in last_overlay_modification_hooks. */
4107 static int last_overlay_modification_hooks_used
;
4109 /* Add one functionlist/overlay pair
4110 to the end of last_overlay_modification_hooks. */
4113 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4115 int oldsize
= ASIZE (last_overlay_modification_hooks
);
4117 if (last_overlay_modification_hooks_used
== oldsize
)
4118 last_overlay_modification_hooks
= larger_vector
4119 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4120 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4121 functionlist
); last_overlay_modification_hooks_used
++;
4122 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4123 overlay
); last_overlay_modification_hooks_used
++;
4126 /* Run the modification-hooks of overlays that include
4127 any part of the text in START to END.
4128 If this change is an insertion, also
4129 run the insert-before-hooks of overlay starting at END,
4130 and the insert-after-hooks of overlay ending at START.
4132 This is called both before and after the modification.
4133 AFTER is nonzero when we call after the modification.
4135 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4136 When AFTER is nonzero, they are the start position,
4137 the position after the inserted new text,
4138 and the length of deleted or replaced old text. */
4141 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4142 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4144 Lisp_Object prop
, overlay
;
4145 struct Lisp_Overlay
*tail
;
4146 /* 1 if this change is an insertion. */
4147 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4148 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4153 /* We used to run the functions as soon as we found them and only register
4154 them in last_overlay_modification_hooks for the purpose of the `after'
4155 case. But running elisp code as we traverse the list of overlays is
4156 painful because the list can be modified by the elisp code so we had to
4157 copy at several places. We now simply do a read-only traversal that
4158 only collects the functions to run and we run them afterwards. It's
4159 simpler, especially since all the code was already there. -stef */
4163 /* We are being called before a change.
4164 Scan the overlays to find the functions to call. */
4165 last_overlay_modification_hooks_used
= 0;
4166 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4168 EMACS_INT startpos
, endpos
;
4169 Lisp_Object ostart
, oend
;
4171 XSETMISC (overlay
, tail
);
4173 ostart
= OVERLAY_START (overlay
);
4174 oend
= OVERLAY_END (overlay
);
4175 endpos
= OVERLAY_POSITION (oend
);
4176 if (XFASTINT (start
) > endpos
)
4178 startpos
= OVERLAY_POSITION (ostart
);
4179 if (insertion
&& (XFASTINT (start
) == startpos
4180 || XFASTINT (end
) == startpos
))
4182 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4184 add_overlay_mod_hooklist (prop
, overlay
);
4186 if (insertion
&& (XFASTINT (start
) == endpos
4187 || XFASTINT (end
) == endpos
))
4189 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4191 add_overlay_mod_hooklist (prop
, overlay
);
4193 /* Test for intersecting intervals. This does the right thing
4194 for both insertion and deletion. */
4195 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4197 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4199 add_overlay_mod_hooklist (prop
, overlay
);
4203 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4205 EMACS_INT startpos
, endpos
;
4206 Lisp_Object ostart
, oend
;
4208 XSETMISC (overlay
, tail
);
4210 ostart
= OVERLAY_START (overlay
);
4211 oend
= OVERLAY_END (overlay
);
4212 startpos
= OVERLAY_POSITION (ostart
);
4213 endpos
= OVERLAY_POSITION (oend
);
4214 if (XFASTINT (end
) < startpos
)
4216 if (insertion
&& (XFASTINT (start
) == startpos
4217 || XFASTINT (end
) == startpos
))
4219 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4221 add_overlay_mod_hooklist (prop
, overlay
);
4223 if (insertion
&& (XFASTINT (start
) == endpos
4224 || XFASTINT (end
) == endpos
))
4226 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4228 add_overlay_mod_hooklist (prop
, overlay
);
4230 /* Test for intersecting intervals. This does the right thing
4231 for both insertion and deletion. */
4232 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4234 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4236 add_overlay_mod_hooklist (prop
, overlay
);
4241 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4243 /* Call the functions recorded in last_overlay_modification_hooks.
4244 First copy the vector contents, in case some of these hooks
4245 do subsequent modification of the buffer. */
4246 int size
= last_overlay_modification_hooks_used
;
4247 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4250 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4251 size
* sizeof (Lisp_Object
));
4253 gcpro1
.nvars
= size
;
4255 for (i
= 0; i
< size
;)
4257 Lisp_Object prop_i
, overlay_i
;
4259 overlay_i
= copy
[i
++];
4260 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4267 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4268 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4270 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4272 GCPRO4 (list
, arg1
, arg2
, arg3
);
4274 while (CONSP (list
))
4277 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4279 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4285 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4288 evaporate_overlays (EMACS_INT pos
)
4290 Lisp_Object overlay
, hit_list
;
4291 struct Lisp_Overlay
*tail
;
4294 if (pos
<= current_buffer
->overlay_center
)
4295 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4298 XSETMISC (overlay
, tail
);
4299 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4302 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4303 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4304 hit_list
= Fcons (overlay
, hit_list
);
4307 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4310 XSETMISC (overlay
, tail
);
4311 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4314 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4315 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4316 hit_list
= Fcons (overlay
, hit_list
);
4318 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4319 Fdelete_overlay (XCAR (hit_list
));
4322 /* Somebody has tried to store a value with an unacceptable type
4323 in the slot with offset OFFSET. */
4326 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4328 Lisp_Object predicate
;
4332 case_Lisp_Int
: predicate
= Qintegerp
; break;
4333 case Lisp_String
: predicate
= Qstringp
; break;
4334 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4338 wrong_type_argument (predicate
, newval
);
4342 /***********************************************************************
4343 Allocation with mmap
4344 ***********************************************************************/
4346 #ifdef USE_MMAP_FOR_BUFFERS
4348 #include <sys/types.h>
4349 #include <sys/mman.h>
4352 #ifdef MAP_ANONYMOUS
4353 #define MAP_ANON MAP_ANONYMOUS
4360 #define MAP_FAILED ((void *) -1)
4372 /* Memory is allocated in regions which are mapped using mmap(2).
4373 The current implementation lets the system select mapped
4374 addresses; we're not using MAP_FIXED in general, except when
4375 trying to enlarge regions.
4377 Each mapped region starts with a mmap_region structure, the user
4378 area starts after that structure, aligned to MEM_ALIGN.
4380 +-----------------------+
4381 | struct mmap_info + |
4383 +-----------------------+
4387 +-----------------------+ */
4391 /* User-specified size. */
4392 size_t nbytes_specified
;
4394 /* Number of bytes mapped */
4395 size_t nbytes_mapped
;
4397 /* Pointer to the location holding the address of the memory
4398 allocated with the mmap'd block. The variable actually points
4399 after this structure. */
4402 /* Next and previous in list of all mmap'd regions. */
4403 struct mmap_region
*next
, *prev
;
4406 /* Doubly-linked list of mmap'd regions. */
4408 static struct mmap_region
*mmap_regions
;
4410 /* File descriptor for mmap. If we don't have anonymous mapping,
4411 /dev/zero will be opened on it. */
4415 /* Temporary storage for mmap_set_vars, see there. */
4417 static struct mmap_region
*mmap_regions_1
;
4418 static int mmap_fd_1
;
4420 /* Page size on this system. */
4422 static int mmap_page_size
;
4424 /* 1 means mmap has been initialized. */
4426 static int mmap_initialized_p
;
4428 /* Value is X rounded up to the next multiple of N. */
4430 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4432 /* Size of mmap_region structure plus padding. */
4434 #define MMAP_REGION_STRUCT_SIZE \
4435 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4437 /* Given a pointer P to the start of the user-visible part of a mapped
4438 region, return a pointer to the start of the region. */
4440 #define MMAP_REGION(P) \
4441 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4443 /* Given a pointer P to the start of a mapped region, return a pointer
4444 to the start of the user-visible part of the region. */
4446 #define MMAP_USER_AREA(P) \
4447 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4449 #define MEM_ALIGN sizeof (double)
4451 /* Predicate returning true if part of the address range [START .. END]
4452 is currently mapped. Used to prevent overwriting an existing
4455 Default is to conservatively assume the address range is occupied by
4456 something else. This can be overridden by system configuration
4457 files if system-specific means to determine this exists. */
4459 #ifndef MMAP_ALLOCATED_P
4460 #define MMAP_ALLOCATED_P(start, end) 1
4463 /* Perform necessary initializations for the use of mmap. */
4469 /* The value of mmap_fd is initially 0 in temacs, and -1
4470 in a dumped Emacs. */
4473 /* No anonymous mmap -- we need the file descriptor. */
4474 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4476 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4478 #endif /* MAP_ANON == 0 */
4480 if (mmap_initialized_p
)
4482 mmap_initialized_p
= 1;
4488 mmap_page_size
= getpagesize ();
4491 /* Return a region overlapping address range START...END, or null if
4492 none. END is not including, i.e. the last byte in the range
4495 static struct mmap_region
*
4496 mmap_find (POINTER_TYPE
*start
, POINTER_TYPE
*end
)
4498 struct mmap_region
*r
;
4499 char *s
= (char *) start
, *e
= (char *) end
;
4501 for (r
= mmap_regions
; r
; r
= r
->next
)
4503 char *rstart
= (char *) r
;
4504 char *rend
= rstart
+ r
->nbytes_mapped
;
4506 if (/* First byte of range, i.e. START, in this region? */
4507 (s
>= rstart
&& s
< rend
)
4508 /* Last byte of range, i.e. END - 1, in this region? */
4509 || (e
> rstart
&& e
<= rend
)
4510 /* First byte of this region in the range? */
4511 || (rstart
>= s
&& rstart
< e
)
4512 /* Last byte of this region in the range? */
4513 || (rend
> s
&& rend
<= e
))
4521 /* Unmap a region. P is a pointer to the start of the user-araa of
4522 the region. Value is non-zero if successful. */
4525 mmap_free_1 (struct mmap_region
*r
)
4528 r
->next
->prev
= r
->prev
;
4530 r
->prev
->next
= r
->next
;
4532 mmap_regions
= r
->next
;
4534 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4536 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4544 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4545 Value is non-zero if successful. */
4548 mmap_enlarge (struct mmap_region
*r
, int npages
)
4550 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4556 /* Unmap pages at the end of the region. */
4557 nbytes
= - npages
* mmap_page_size
;
4558 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4559 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4562 r
->nbytes_mapped
-= nbytes
;
4566 else if (npages
> 0)
4568 nbytes
= npages
* mmap_page_size
;
4570 /* Try to map additional pages at the end of the region. We
4571 cannot do this if the address range is already occupied by
4572 something else because mmap deletes any previous mapping.
4573 I'm not sure this is worth doing, let's see. */
4574 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4578 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4579 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4580 if (p
== MAP_FAILED
)
4581 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4582 else if (p
!= (POINTER_TYPE
*) region_end
)
4584 /* Kernels are free to choose a different address. In
4585 that case, unmap what we've mapped above; we have
4587 if (munmap (p
, nbytes
) == -1)
4588 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4592 r
->nbytes_mapped
+= nbytes
;
4602 /* Set or reset variables holding references to mapped regions. If
4603 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4604 non-zero, set all variables to the start of the user-areas
4607 This function is called from Fdump_emacs to ensure that the dumped
4608 Emacs doesn't contain references to memory that won't be mapped
4609 when Emacs starts. */
4612 mmap_set_vars (int restore_p
)
4614 struct mmap_region
*r
;
4618 mmap_regions
= mmap_regions_1
;
4619 mmap_fd
= mmap_fd_1
;
4620 for (r
= mmap_regions
; r
; r
= r
->next
)
4621 *r
->var
= MMAP_USER_AREA (r
);
4625 for (r
= mmap_regions
; r
; r
= r
->next
)
4627 mmap_regions_1
= mmap_regions
;
4628 mmap_regions
= NULL
;
4629 mmap_fd_1
= mmap_fd
;
4635 /* Allocate a block of storage large enough to hold NBYTES bytes of
4636 data. A pointer to the data is returned in *VAR. VAR is thus the
4637 address of some variable which will use the data area.
4639 The allocation of 0 bytes is valid.
4641 If we can't allocate the necessary memory, set *VAR to null, and
4644 static POINTER_TYPE
*
4645 mmap_alloc (POINTER_TYPE
**var
, size_t nbytes
)
4652 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4653 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4656 if (p
== MAP_FAILED
)
4658 if (errno
!= ENOMEM
)
4659 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4664 struct mmap_region
*r
= (struct mmap_region
*) p
;
4666 r
->nbytes_specified
= nbytes
;
4667 r
->nbytes_mapped
= map
;
4670 r
->next
= mmap_regions
;
4675 p
= MMAP_USER_AREA (p
);
4682 /* Free a block of relocatable storage whose data is pointed to by
4683 PTR. Store 0 in *PTR to show there's no block allocated. */
4686 mmap_free (POINTER_TYPE
**var
)
4692 mmap_free_1 (MMAP_REGION (*var
));
4698 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4699 resize it to size NBYTES. Change *VAR to reflect the new block,
4700 and return this value. If more memory cannot be allocated, then
4701 leave *VAR unchanged, and return null. */
4703 static POINTER_TYPE
*
4704 mmap_realloc (POINTER_TYPE
**var
, size_t nbytes
)
4706 POINTER_TYPE
*result
;
4711 result
= mmap_alloc (var
, nbytes
);
4712 else if (nbytes
== 0)
4715 result
= mmap_alloc (var
, nbytes
);
4719 struct mmap_region
*r
= MMAP_REGION (*var
);
4720 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4725 POINTER_TYPE
*old_ptr
= *var
;
4727 /* Try to map additional pages at the end of the region.
4728 If that fails, allocate a new region, copy data
4729 from the old region, then free it. */
4730 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4733 r
->nbytes_specified
= nbytes
;
4734 *var
= result
= old_ptr
;
4736 else if (mmap_alloc (var
, nbytes
))
4738 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4739 mmap_free_1 (MMAP_REGION (old_ptr
));
4741 r
= MMAP_REGION (result
);
4742 r
->nbytes_specified
= nbytes
;
4750 else if (room
- nbytes
>= mmap_page_size
)
4752 /* Shrinking by at least a page. Let's give some
4753 memory back to the system.
4755 The extra parens are to make the division happens first,
4756 on positive values, so we know it will round towards
4758 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4760 r
->nbytes_specified
= nbytes
;
4764 /* Leave it alone. */
4766 r
->nbytes_specified
= nbytes
;
4774 #endif /* USE_MMAP_FOR_BUFFERS */
4778 /***********************************************************************
4779 Buffer-text Allocation
4780 ***********************************************************************/
4783 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4784 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4785 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4786 #endif /* REL_ALLOC */
4789 /* Allocate NBYTES bytes for buffer B's text buffer. */
4792 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4797 #if defined USE_MMAP_FOR_BUFFERS
4798 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4799 #elif defined REL_ALLOC
4800 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4802 p
= xmalloc (nbytes
);
4808 memory_full (nbytes
);
4811 b
->text
->beg
= (unsigned char *) p
;
4815 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4819 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
4822 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4825 #if defined USE_MMAP_FOR_BUFFERS
4826 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4827 #elif defined REL_ALLOC
4828 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4830 p
= xrealloc (b
->text
->beg
, nbytes
);
4836 memory_full (nbytes
);
4839 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4844 /* Free buffer B's text buffer. */
4847 free_buffer_text (struct buffer
*b
)
4851 #if defined USE_MMAP_FOR_BUFFERS
4852 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4853 #elif defined REL_ALLOC
4854 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4856 xfree (b
->text
->beg
);
4859 BUF_BEG_ADDR (b
) = NULL
;
4865 /***********************************************************************
4867 ***********************************************************************/
4870 init_buffer_once (void)
4874 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4876 /* Make sure all markable slots in buffer_defaults
4877 are initialized reasonably, so mark_buffer won't choke. */
4878 reset_buffer (&buffer_defaults
);
4879 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4880 reset_buffer_local_variables (&buffer_defaults
, 1);
4881 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4882 reset_buffer (&buffer_local_symbols
);
4883 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4884 /* Prevent GC from getting confused. */
4885 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4886 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4887 BUF_INTERVALS (&buffer_defaults
) = 0;
4888 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4889 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4890 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4891 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4892 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4894 /* Set up the default values of various buffer slots. */
4895 /* Must do these before making the first buffer! */
4897 /* real setup is done in bindings.el */
4898 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4899 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4900 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4901 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4902 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4903 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4904 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4906 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4908 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4909 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4910 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4911 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4912 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4913 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4914 buffer_defaults
.overlays_before
= NULL
;
4915 buffer_defaults
.overlays_after
= NULL
;
4916 buffer_defaults
.overlay_center
= BEG
;
4918 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4919 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4920 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4921 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4922 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4923 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4924 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4925 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4926 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4928 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4929 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4930 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4931 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4932 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4933 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4934 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4935 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4936 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4937 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4938 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4939 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4940 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4941 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4942 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4943 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4944 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4945 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4946 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4947 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4948 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4950 /* Assign the local-flags to the slots that have default values.
4951 The local flag is a bit that is used in the buffer
4952 to say that it has its own local value for the slot.
4953 The local flag bits are in the local_var_flags slot of the buffer. */
4955 /* Nothing can work if this isn't true */
4956 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4958 /* 0 means not a lisp var, -1 means always local, else mask */
4959 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4960 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4961 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4962 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4963 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4964 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4965 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4966 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4967 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4968 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4969 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4970 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4971 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4972 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4973 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4974 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4975 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4976 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4977 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4980 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4981 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4982 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4983 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5002 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5003 /* Make this one a permanent local. */
5004 buffer_permanent_local_flags
[idx
++] = 1;
5005 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5007 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5023 /* Need more room? */
5024 if (idx
>= MAX_PER_BUFFER_VARS
)
5026 last_per_buffer_idx
= idx
;
5028 Vbuffer_alist
= Qnil
;
5032 QSFundamental
= make_pure_c_string ("Fundamental");
5034 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5035 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5037 Qmode_class
= intern_c_string ("mode-class");
5039 Qprotected_field
= intern_c_string ("protected-field");
5041 Qpermanent_local
= intern_c_string ("permanent-local");
5043 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5044 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5046 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5048 /* super-magic invisible buffer */
5049 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5050 Vbuffer_alist
= Qnil
;
5052 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5054 inhibit_modification_hooks
= 0;
5064 #ifdef USE_MMAP_FOR_BUFFERS
5066 /* When using the ralloc implementation based on mmap(2), buffer
5067 text pointers will have been set to null in the dumped Emacs.
5071 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5072 if (b
->text
->beg
== NULL
)
5073 enlarge_buffer_text (b
, 0);
5075 #endif /* USE_MMAP_FOR_BUFFERS */
5077 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5078 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5079 Fset_buffer_multibyte (Qnil
);
5081 pwd
= get_current_dir_name ();
5084 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5086 /* Maybe this should really use some standard subroutine
5087 whose definition is filename syntax dependent. */
5089 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5091 /* Grow buffer to add directory separator and '\0'. */
5092 pwd
= (char *) realloc (pwd
, len
+ 2);
5094 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5095 pwd
[len
] = DIRECTORY_SEP
;
5096 pwd
[len
+ 1] = '\0';
5099 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5100 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5101 /* At this moment, we still don't know how to decode the
5102 directory name. So, we keep the bytes in multibyte form so
5103 that ENCODE_FILE correctly gets the original bytes. */
5104 BVAR (current_buffer
, directory
)
5105 = string_to_multibyte (BVAR (current_buffer
, directory
));
5107 /* Add /: to the front of the name
5108 if it would otherwise be treated as magic. */
5109 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5111 /* If the default dir is just /, TEMP is non-nil
5112 because of the ange-ftp completion handler.
5113 However, it is not necessary to turn / into /:/.
5114 So avoid doing that. */
5115 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5116 BVAR (current_buffer
, directory
)
5117 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5119 temp
= get_minibuffer (0);
5120 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5125 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5126 Object stored in the current buffer. address is the address of the slot
5127 in the buffer that is current now. */
5129 /* TYPE is nil for a general Lisp variable.
5130 An integer specifies a type; then only Lisp values
5131 with that type code are allowed (except that nil is allowed too).
5132 LNAME is the Lisp-level variable name.
5133 VNAME is the name of the buffer slot.
5134 DOC is a dummy where you write the doc string as a comment. */
5135 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5137 static struct Lisp_Buffer_Objfwd bo_fwd; \
5138 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5142 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5143 Lisp_Object
*address
, Lisp_Object type
)
5145 struct Lisp_Symbol
*sym
;
5148 sym
= XSYMBOL (intern (namestring
));
5149 offset
= (char *)address
- (char *)current_buffer
;
5151 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5152 bo_fwd
->offset
= offset
;
5153 bo_fwd
->slottype
= type
;
5154 sym
->declared_special
= 1;
5155 sym
->redirect
= SYMBOL_FORWARDED
;
5157 /* I tried to do the job without a cast, but it seems impossible.
5158 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5159 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5161 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5163 if (PER_BUFFER_IDX (offset
) == 0)
5164 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5165 slot of buffer_local_flags */
5170 /* initialize the buffer routines */
5172 syms_of_buffer (void)
5174 staticpro (&last_overlay_modification_hooks
);
5175 last_overlay_modification_hooks
5176 = Fmake_vector (make_number (10), Qnil
);
5178 staticpro (&Vbuffer_defaults
);
5179 staticpro (&Vbuffer_local_symbols
);
5180 staticpro (&Qfundamental_mode
);
5181 staticpro (&Qmode_class
);
5182 staticpro (&QSFundamental
);
5183 staticpro (&Vbuffer_alist
);
5184 staticpro (&Qprotected_field
);
5185 staticpro (&Qpermanent_local
);
5186 staticpro (&Qkill_buffer_hook
);
5188 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5189 DEFSYM (Qoverlayp
, "overlayp");
5190 DEFSYM (Qevaporate
, "evaporate");
5191 DEFSYM (Qmodification_hooks
, "modification-hooks");
5192 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5193 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5194 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5195 DEFSYM (Qpriority
, "priority");
5196 DEFSYM (Qbefore_string
, "before-string");
5197 DEFSYM (Qafter_string
, "after-string");
5198 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5199 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5200 DEFSYM (Qafter_change_functions
, "after-change-functions");
5201 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5203 /* The next one is initialized in init_buffer_once. */
5204 staticpro (&Qucs_set_table_for_input
);
5206 Fput (Qprotected_field
, Qerror_conditions
,
5207 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5208 Fput (Qprotected_field
, Qerror_message
,
5209 make_pure_c_string ("Attempt to modify a protected field"));
5211 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5213 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5214 This is the same as (default-value 'mode-line-format). */);
5216 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5218 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5219 This is the same as (default-value 'header-line-format). */);
5221 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5222 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5223 This is the same as (default-value 'cursor-type). */);
5225 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5227 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5228 This is the same as (default-value 'line-spacing). */);
5230 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5231 cursor_in_non_selected_windows
,
5232 doc
: /* Default value of `cursor-in-non-selected-windows'.
5233 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5235 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5237 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5238 This is the same as (default-value 'abbrev-mode). */);
5240 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5242 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5243 This is the same as (default-value 'ctl-arrow). */);
5245 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5246 enable_multibyte_characters
,
5247 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5248 This is the same as (default-value 'enable-multibyte-characters). */);
5250 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5251 buffer_file_coding_system
,
5252 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5253 This is the same as (default-value 'buffer-file-coding-system). */);
5255 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5257 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5258 This is the same as (default-value 'truncate-lines). */);
5260 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5262 doc
: /* Default value of `fill-column' for buffers that do not override it.
5263 This is the same as (default-value 'fill-column). */);
5265 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5267 doc
: /* Default value of `left-margin' for buffers that do not override it.
5268 This is the same as (default-value 'left-margin). */);
5270 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5272 doc
: /* Default value of `tab-width' for buffers that do not override it.
5273 This is the same as (default-value 'tab-width). */);
5275 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5277 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5278 This is the same as (default-value 'case-fold-search). */);
5280 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5282 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5283 This is the same as (default-value 'left-margin-width). */);
5285 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5287 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5288 This is the same as (default-value 'right-margin-width). */);
5290 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5292 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5293 This is the same as (default-value 'left-fringe-width). */);
5295 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5297 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5298 This is the same as (default-value 'right-fringe-width). */);
5300 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5301 fringes_outside_margins
,
5302 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5303 This is the same as (default-value 'fringes-outside-margins). */);
5305 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5307 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5308 This is the same as (default-value 'scroll-bar-width). */);
5310 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5311 vertical_scroll_bar_type
,
5312 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5313 This is the same as (default-value 'vertical-scroll-bar). */);
5315 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5316 indicate_empty_lines
,
5317 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5318 This is the same as (default-value 'indicate-empty-lines). */);
5320 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5321 indicate_buffer_boundaries
,
5322 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5323 This is the same as (default-value 'indicate-buffer-boundaries). */);
5325 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5326 fringe_indicator_alist
,
5327 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5328 This is the same as (default-value 'fringe-indicator-alist'). */);
5330 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5331 fringe_cursor_alist
,
5332 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5333 This is the same as (default-value 'fringe-cursor-alist'). */);
5335 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5336 scroll_up_aggressively
,
5337 doc
: /* Default value of `scroll-up-aggressively'.
5338 This value applies in buffers that don't have their own local values.
5339 This is the same as (default-value 'scroll-up-aggressively). */);
5341 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5342 scroll_down_aggressively
,
5343 doc
: /* Default value of `scroll-down-aggressively'.
5344 This value applies in buffers that don't have their own local values.
5345 This is the same as (default-value 'scroll-down-aggressively). */);
5347 DEFVAR_PER_BUFFER ("header-line-format",
5348 &BVAR (current_buffer
, header_line_format
),
5350 doc
: /* Analogous to `mode-line-format', but controls the header line.
5351 The header line appears, optionally, at the top of a window;
5352 the mode line appears at the bottom. */);
5354 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5356 doc
: /* Template for displaying mode line for current buffer.
5357 Each buffer has its own value of this variable.
5358 Value may be nil, a string, a symbol or a list or cons cell.
5359 A value of nil means don't display a mode line.
5360 For a symbol, its value is used (but it is ignored if t or nil).
5361 A string appearing directly as the value of a symbol is processed verbatim
5362 in that the %-constructs below are not recognized.
5363 Note that unless the symbol is marked as a `risky-local-variable', all
5364 properties in any strings, as well as all :eval and :propertize forms
5365 in the value of that symbol will be ignored.
5366 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5367 is used as a mode line element. Be careful--FORM should not load any files,
5368 because that can cause an infinite recursion.
5369 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5370 with the specified properties PROPS applied.
5371 For a list whose car is a symbol, the symbol's value is taken,
5372 and if that is non-nil, the cadr of the list is processed recursively.
5373 Otherwise, the caddr of the list (if there is one) is processed.
5374 For a list whose car is a string or list, each element is processed
5375 recursively and the results are effectively concatenated.
5376 For a list whose car is an integer, the cdr of the list is processed
5377 and padded (if the number is positive) or truncated (if negative)
5378 to the width specified by that number.
5379 A string is printed verbatim in the mode line except for %-constructs:
5380 (%-constructs are allowed when the string is the entire mode-line-format
5381 or when it is found in a cons-cell or a list)
5382 %b -- print buffer name. %f -- print visited file name.
5383 %F -- print frame name.
5384 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5385 %& is like %*, but ignore read-only-ness.
5386 % means buffer is read-only and * means it is modified.
5387 For a modified read-only buffer, %* gives % and %+ gives *.
5388 %s -- print process status. %l -- print the current line number.
5389 %c -- print the current column number (this makes editing slower).
5390 To make the column number update correctly in all cases,
5391 `column-number-mode' must be non-nil.
5392 %i -- print the size of the buffer.
5393 %I -- like %i, but use k, M, G, etc., to abbreviate.
5394 %p -- print percent of buffer above top of window, or Top, Bot or All.
5395 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5396 or print Bottom or All.
5397 %n -- print Narrow if appropriate.
5398 %t -- visited file is text or binary (if OS supports this distinction).
5399 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5400 %Z -- like %z, but including the end-of-line format.
5401 %e -- print error message about full memory.
5402 %@ -- print @ or hyphen. @ means that default-directory is on a
5404 %[ -- print one [ for each recursive editing level. %] similar.
5405 %% -- print %. %- -- print infinitely many dashes.
5406 Decimal digits after the % specify field width to which to pad. */);
5408 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5409 doc
: /* *Value of `major-mode' for new buffers. */);
5411 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5412 make_number (Lisp_Symbol
),
5413 doc
: /* Symbol for current buffer's major mode.
5414 The default value (normally `fundamental-mode') affects new buffers.
5415 A value of nil means to use the current buffer's major mode, provided
5416 it is not marked as "special".
5418 When a mode is used by default, `find-file' switches to it before it
5419 reads the contents into the buffer and before it finishes setting up
5420 the buffer. Thus, the mode and its hooks should not expect certain
5421 variables such as `buffer-read-only' and `buffer-file-coding-system'
5424 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5426 doc
: /* Pretty name of current buffer's major mode.
5427 Usually a string, but can use any of the constructs for `mode-line-format',
5429 Format with `format-mode-line' to produce a string value. */);
5431 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5432 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5434 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5435 doc
: /* Non-nil if Abbrev mode is enabled.
5436 Use the command `abbrev-mode' to change this variable. */);
5438 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5440 doc
: /* *Non-nil if searches and matches should ignore case. */);
5442 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5443 make_number (LISP_INT_TAG
),
5444 doc
: /* *Column beyond which automatic line-wrapping should happen.
5445 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5447 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5448 make_number (LISP_INT_TAG
),
5449 doc
: /* *Column for the default `indent-line-function' to indent to.
5450 Linefeed indents to this column in Fundamental mode. */);
5452 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5453 make_number (LISP_INT_TAG
),
5454 doc
: /* *Distance between tab stops (for display of tab characters), in columns.
5455 This should be an integer greater than zero. */);
5457 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5458 doc
: /* *Non-nil means display control chars with uparrow.
5459 A value of nil means use backslash and octal digits.
5460 This variable does not apply to characters whose display is specified
5461 in the current display table (if there is one). */);
5463 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5464 &BVAR (current_buffer
, enable_multibyte_characters
),
5466 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5467 Otherwise they are regarded as unibyte. This affects the display,
5468 file I/O and the behavior of various editing commands.
5470 This variable is buffer-local but you cannot set it directly;
5471 use the function `set-buffer-multibyte' to change a buffer's representation.
5472 See also Info node `(elisp)Text Representations'. */);
5473 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5475 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5476 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5477 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5478 This variable applies to saving the buffer, and also to `write-region'
5479 and other functions that use `write-region'.
5480 It does not apply to sending output to subprocesses, however.
5482 If this is nil, the buffer is saved without any code conversion
5483 unless some coding system is specified in `file-coding-system-alist'
5484 for the buffer file.
5486 If the text to be saved cannot be encoded as specified by this variable,
5487 an alternative encoding is selected by `select-safe-coding-system', which see.
5489 The variable `coding-system-for-write', if non-nil, overrides this variable.
5491 This variable is never applied to a way of decoding a file while reading it. */);
5493 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5494 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5495 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5497 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5498 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5499 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5501 If this is nil (the default), the direction of each paragraph is
5502 determined by the first strong directional character of its text.
5503 The values of `right-to-left' and `left-to-right' override that.
5504 Any other value is treated as nil.
5506 This variable has no effect unless the buffer's value of
5507 \`bidi-display-reordering' is non-nil. */);
5509 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5510 doc
: /* *Non-nil means do not display continuation lines.
5511 Instead, give each line of text just one screen line.
5513 Note that this is overridden by the variable
5514 `truncate-partial-width-windows' if that variable is non-nil
5515 and this buffer is not full-frame width.
5517 Minibuffers set this variable to nil. */);
5519 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5520 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5521 When word-wrapping is on, continuation lines are wrapped at the space
5522 or tab character nearest to the right window edge.
5523 If nil, continuation lines are wrapped at the right screen edge.
5525 This variable has no effect if long lines are truncated (see
5526 `truncate-lines' and `truncate-partial-width-windows'). If you use
5527 word-wrapping, you might want to reduce the value of
5528 `truncate-partial-width-windows', since wrapping can make text readable
5529 in narrower windows. */);
5531 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5532 make_number (Lisp_String
),
5533 doc
: /* Name of default directory of current buffer. Should end with slash.
5534 To interactively change the default directory, use command `cd'. */);
5536 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5538 doc
: /* Function called (if non-nil) to perform auto-fill.
5539 It is called after self-inserting any character specified in
5540 the `auto-fill-chars' table.
5541 NOTE: This variable is not a hook;
5542 its value may not be a list of functions. */);
5544 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5545 make_number (Lisp_String
),
5546 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5548 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5549 make_number (Lisp_String
),
5550 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5551 The truename of a file is calculated by `file-truename'
5552 and then abbreviated with `abbreviate-file-name'. */);
5554 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5555 &BVAR (current_buffer
, auto_save_file_name
),
5556 make_number (Lisp_String
),
5557 doc
: /* Name of file for auto-saving current buffer.
5558 If it is nil, that means don't auto-save this buffer. */);
5560 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5561 doc
: /* Non-nil if this buffer is read-only. */);
5563 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5564 doc
: /* Non-nil if this buffer's file has been backed up.
5565 Backing up is done before the first time the file is saved. */);
5567 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5568 make_number (LISP_INT_TAG
),
5569 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5571 -1 means auto-saving turned off until next real save.
5573 If you set this to -2, that means don't turn off auto-saving in this buffer
5574 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5575 you probably should set this to -2 in that buffer. */);
5577 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5579 doc
: /* Non-nil enables selective display.
5580 An integer N as value means display only lines
5581 that start with less than N columns of space.
5582 A value of t means that the character ^M makes itself and
5583 all the rest of the line invisible; also, when saving the buffer
5584 in a file, save the ^M as a newline. */);
5587 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5588 &BVAR (current_buffer
, selective_display_ellipses
),
5590 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5593 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5594 doc
: /* Non-nil if self-insertion should replace existing text.
5595 The value should be one of `overwrite-mode-textual',
5596 `overwrite-mode-binary', or nil.
5597 If it is `overwrite-mode-textual', self-insertion still
5598 inserts at the end of a line, and inserts when point is before a tab,
5599 until the tab is filled in.
5600 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5602 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5604 doc
: /* Display table that controls display of the contents of current buffer.
5606 If this variable is nil, the value of `standard-display-table' is used.
5607 Each window can have its own, overriding display table, see
5608 `set-window-display-table' and `window-display-table'.
5610 The display table is a char-table created with `make-display-table'.
5611 A char-table is an array indexed by character codes. Normal array
5612 primitives `aref' and `aset' can be used to access elements of a char-table.
5614 Each of the char-table elements control how to display the corresponding
5615 text character: the element at index C in the table says how to display
5616 the character whose code is C. Each element should be a vector of
5617 characters or nil. The value nil means display the character in the
5618 default fashion; otherwise, the characters from the vector are delivered
5619 to the screen instead of the original character.
5621 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5622 to display a capital Y instead of each X character.
5624 In addition, a char-table has six extra slots to control the display of:
5626 the end of a truncated screen line (extra-slot 0, a single character);
5627 the end of a continued line (extra-slot 1, a single character);
5628 the escape character used to display character codes in octal
5629 (extra-slot 2, a single character);
5630 the character used as an arrow for control characters (extra-slot 3,
5631 a single character);
5632 the decoration indicating the presence of invisible lines (extra-slot 4,
5633 a vector of characters);
5634 the character used to draw the border between side-by-side windows
5635 (extra-slot 5, a single character).
5637 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5639 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5641 doc
: /* *Width of left marginal area for display of a buffer.
5642 A value of nil means no marginal area. */);
5644 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5646 doc
: /* *Width of right marginal area for display of a buffer.
5647 A value of nil means no marginal area. */);
5649 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5651 doc
: /* *Width of this buffer's left fringe (in pixels).
5652 A value of 0 means no left fringe is shown in this buffer's window.
5653 A value of nil means to use the left fringe width from the window's frame. */);
5655 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5657 doc
: /* *Width of this buffer's right fringe (in pixels).
5658 A value of 0 means no right fringe is shown in this buffer's window.
5659 A value of nil means to use the right fringe width from the window's frame. */);
5661 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5663 doc
: /* *Non-nil means to display fringes outside display margins.
5664 A value of nil means to display fringes between margins and buffer text. */);
5666 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5668 doc
: /* *Width of this buffer's scroll bars in pixels.
5669 A value of nil means to use the scroll bar width from the window's frame. */);
5671 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5673 doc
: /* *Position of this buffer's vertical scroll bar.
5674 The value takes effect whenever you tell a window to display this buffer;
5675 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5677 A value of `left' or `right' means put the vertical scroll bar at that side
5678 of the window; a value of nil means don't show any vertical scroll bars.
5679 A value of t (the default) means do whatever the window's frame specifies. */);
5681 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5682 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5683 doc
: /* *Visually indicate empty lines after the buffer end.
5684 If non-nil, a bitmap is displayed in the left fringe of a window on
5685 window-systems. */);
5687 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5688 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5689 doc
: /* *Visually indicate buffer boundaries and scrolling.
5690 If non-nil, the first and last line of the buffer are marked in the fringe
5691 of a window on window-systems with angle bitmaps, or if the window can be
5692 scrolled, the top and bottom line of the window are marked with up and down
5695 If value is a symbol `left' or `right', both angle and arrow bitmaps
5696 are displayed in the left or right fringe, resp. Any other value
5697 that doesn't look like an alist means display the angle bitmaps in
5698 the left fringe but no arrows.
5700 You can exercise more precise control by using an alist as the
5701 value. Each alist element (INDICATOR . POSITION) specifies
5702 where to show one of the indicators. INDICATOR is one of `top',
5703 `bottom', `up', `down', or t, which specifies the default position,
5704 and POSITION is one of `left', `right', or nil, meaning do not show
5707 For example, ((top . left) (t . right)) places the top angle bitmap in
5708 left fringe, the bottom angle bitmap in right fringe, and both arrow
5709 bitmaps in right fringe. To show just the angle bitmaps in the left
5710 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5712 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5713 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5714 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5715 The value is an alist where each element (INDICATOR . BITMAPS)
5716 specifies the fringe bitmaps used to display a specific logical
5719 INDICATOR specifies the logical indicator type which is one of the
5720 following symbols: `truncation' , `continuation', `overlay-arrow',
5721 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5723 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5724 the actual bitmap shown in the left or right fringe for the logical
5725 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5726 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5727 are used only for the `bottom' and `top-bottom' indicators when the
5728 last (only) line has no final newline. BITMAPS may also be a single
5729 symbol which is used in both left and right fringes. */);
5731 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5732 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5733 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5734 The value is an alist where each element (CURSOR . BITMAP)
5735 specifies the fringe bitmaps used to display a specific logical
5736 cursor type in the fringe.
5738 CURSOR specifies the logical cursor type which is one of the following
5739 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5740 one is used to show a hollow cursor on narrow lines display lines
5741 where the normal hollow cursor will not fit.
5743 BITMAP is the corresponding fringe bitmap shown for the logical
5746 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5747 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5748 doc
: /* How far to scroll windows upward.
5749 If you move point off the bottom, the window scrolls automatically.
5750 This variable controls how far it scrolls. The value nil, the default,
5751 means scroll to center point. A fraction means scroll to put point
5752 that fraction of the window's height from the bottom of the window.
5753 When the value is 0.0, point goes at the bottom line, which in the
5754 simple case that you moved off with C-f means scrolling just one line.
5755 1.0 means point goes at the top, so that in that simple case, the
5756 window scrolls by a full window height. Meaningful values are
5757 between 0.0 and 1.0, inclusive. */);
5759 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5760 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5761 doc
: /* How far to scroll windows downward.
5762 If you move point off the top, the window scrolls automatically.
5763 This variable controls how far it scrolls. The value nil, the default,
5764 means scroll to center point. A fraction means scroll to put point
5765 that fraction of the window's height from the top of the window.
5766 When the value is 0.0, point goes at the top line, which in the
5767 simple case that you moved off with C-b means scrolling just one line.
5768 1.0 means point goes at the bottom, so that in that simple case, the
5769 window scrolls by a full window height. Meaningful values are
5770 between 0.0 and 1.0, inclusive. */);
5772 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5776 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5777 doc
: /* List of functions to call before each text change.
5778 Two arguments are passed to each function: the positions of
5779 the beginning and end of the range of old text to be changed.
5780 \(For an insertion, the beginning and end are at the same place.)
5781 No information is given about the length of the text after the change.
5783 Buffer changes made while executing the `before-change-functions'
5784 don't call any before-change or after-change functions.
5785 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5787 If an unhandled error happens in running these functions,
5788 the variable's value remains nil. That prevents the error
5789 from happening repeatedly and making Emacs nonfunctional. */);
5790 Vbefore_change_functions
= Qnil
;
5792 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5793 doc
: /* List of functions to call after each text change.
5794 Three arguments are passed to each function: the positions of
5795 the beginning and end of the range of changed text,
5796 and the length in bytes of the pre-change text replaced by that range.
5797 \(For an insertion, the pre-change length is zero;
5798 for a deletion, that length is the number of bytes deleted,
5799 and the post-change beginning and end are at the same place.)
5801 Buffer changes made while executing the `after-change-functions'
5802 don't call any before-change or after-change functions.
5803 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5805 If an unhandled error happens in running these functions,
5806 the variable's value remains nil. That prevents the error
5807 from happening repeatedly and making Emacs nonfunctional. */);
5808 Vafter_change_functions
= Qnil
;
5810 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5811 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5812 The functions are run using the `run-hooks' function. */);
5813 Vfirst_change_hook
= Qnil
;
5815 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5816 doc
: /* List of undo entries in current buffer.
5817 Recent changes come first; older changes follow newer.
5819 An entry (BEG . END) represents an insertion which begins at
5820 position BEG and ends at position END.
5822 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5823 from (abs POSITION). If POSITION is positive, point was at the front
5824 of the text being deleted; if negative, point was at the end.
5826 An entry (t HIGH . LOW) indicates that the buffer previously had
5827 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5828 of the visited file's modification time, as of that time. If the
5829 modification time of the most recent save is different, this entry is
5832 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5833 was modified between BEG and END. PROPERTY is the property name,
5834 and VALUE is the old value.
5836 An entry (apply FUN-NAME . ARGS) means undo the change with
5837 \(apply FUN-NAME ARGS).
5839 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5840 in the active region. BEG and END is the range affected by this entry
5841 and DELTA is the number of bytes added or deleted in that range by
5844 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5845 was adjusted in position by the offset DISTANCE (an integer).
5847 An entry of the form POSITION indicates that point was at the buffer
5848 location given by the integer. Undoing an entry of this form places
5851 Entries with value `nil' mark undo boundaries. The undo command treats
5852 the changes between two undo boundaries as a single step to be undone.
5854 If the value of the variable is t, undo information is not recorded. */);
5856 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5857 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5859 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5860 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5862 Normally, the line-motion functions work by scanning the buffer for
5863 newlines. Columnar operations (like `move-to-column' and
5864 `compute-motion') also work by scanning the buffer, summing character
5865 widths as they go. This works well for ordinary text, but if the
5866 buffer's lines are very long (say, more than 500 characters), these
5867 motion functions will take longer to execute. Emacs may also take
5868 longer to update the display.
5870 If `cache-long-line-scans' is non-nil, these motion functions cache the
5871 results of their scans, and consult the cache to avoid rescanning
5872 regions of the buffer until the text is modified. The caches are most
5873 beneficial when they prevent the most searching---that is, when the
5874 buffer contains long lines and large regions of characters with the
5875 same, fixed screen width.
5877 When `cache-long-line-scans' is non-nil, processing short lines will
5878 become slightly slower (because of the overhead of consulting the
5879 cache), and the caches will use memory roughly proportional to the
5880 number of newlines and characters whose screen width varies.
5882 The caches require no explicit maintenance; their accuracy is
5883 maintained internally by the Emacs primitives. Enabling or disabling
5884 the cache should not affect the behavior of any of the motion
5885 functions; it should only affect their performance. */);
5887 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5888 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5890 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5891 doc
: /* List of formats to use when saving this buffer.
5892 Formats are defined by `format-alist'. This variable is
5893 set when a file is visited. */);
5895 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5896 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5897 doc
: /* *Format in which to write auto-save files.
5898 Should be a list of symbols naming formats that are defined in `format-alist'.
5899 If it is t, which is the default, auto-save files are written in the
5900 same format as a regular save would use. */);
5902 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5903 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5904 doc
: /* Invisibility spec of this buffer.
5905 The default is t, which means that text is invisible
5906 if it has a non-nil `invisible' property.
5907 If the value is a list, a text character is invisible if its `invisible'
5908 property is an element in that list (or is a list with members in common).
5909 If an element is a cons cell of the form (PROP . ELLIPSIS),
5910 then characters with property value PROP are invisible,
5911 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5913 DEFVAR_PER_BUFFER ("buffer-display-count",
5914 &BVAR (current_buffer
, display_count
), Qnil
,
5915 doc
: /* A number incremented each time this buffer is displayed in a window.
5916 The function `set-window-buffer' increments it. */);
5918 DEFVAR_PER_BUFFER ("buffer-display-time",
5919 &BVAR (current_buffer
, display_time
), Qnil
,
5920 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5921 The function `set-window-buffer' updates this variable
5922 to the value obtained by calling `current-time'.
5923 If the buffer has never been shown in a window, the value is nil. */);
5925 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5926 doc
: /* Non-nil if Transient Mark mode is enabled.
5927 See the command `transient-mark-mode' for a description of this minor mode.
5929 Non-nil also enables highlighting of the region whenever the mark is active.
5930 The variable `highlight-nonselected-windows' controls whether to highlight
5931 all windows or just the selected window.
5933 Lisp programs may give this variable certain special values:
5935 - A value of `lambda' enables Transient Mark mode temporarily.
5936 It is disabled again after any subsequent action that would
5937 normally deactivate the mark (e.g. buffer modification).
5939 - A value of (only . OLDVAL) enables Transient Mark mode
5940 temporarily. After any subsequent point motion command that is
5941 not shift-translated, or any other action that would normally
5942 deactivate the mark (e.g. buffer modification), the value of
5943 `transient-mark-mode' is set to OLDVAL. */);
5944 Vtransient_mark_mode
= Qnil
;
5946 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5947 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5948 If the value is t, disregard `buffer-read-only' and all `read-only'
5949 text properties. If the value is a list, disregard `buffer-read-only'
5950 and disregard a `read-only' text property if the property value
5951 is a member of the list. */);
5952 Vinhibit_read_only
= Qnil
;
5954 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5955 doc
: /* Cursor to use when this buffer is in the selected window.
5956 Values are interpreted as follows:
5958 t use the cursor specified for the frame
5959 nil don't display a cursor
5960 box display a filled box cursor
5961 hollow display a hollow box cursor
5962 bar display a vertical bar cursor with default width
5963 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5964 hbar display a horizontal bar cursor with default height
5965 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5966 ANYTHING ELSE display a hollow box cursor
5968 When the buffer is displayed in a non-selected window, the
5969 cursor's appearance is instead controlled by the variable
5970 `cursor-in-non-selected-windows'. */);
5972 DEFVAR_PER_BUFFER ("line-spacing",
5973 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5974 doc
: /* Additional space to put between lines when displaying a buffer.
5975 The space is measured in pixels, and put below lines on graphic displays,
5976 see `display-graphic-p'.
5977 If value is a floating point number, it specifies the spacing relative
5978 to the default frame line height. A value of nil means add no extra space. */);
5980 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5981 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5982 doc
: /* *Non-nil means show a cursor in non-selected windows.
5983 If nil, only shows a cursor in the selected window.
5984 If t, displays a cursor related to the usual cursor type
5985 \(a solid box becomes hollow, a bar becomes a narrower bar).
5986 You can also specify the cursor type as in the `cursor-type' variable.
5987 Use Custom to set this variable and update the display." */);
5989 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5990 doc
: /* List of functions called with no args to query before killing a buffer.
5991 The buffer being killed will be current while the functions are running.
5992 If any of them returns nil, the buffer is not killed. */);
5993 Vkill_buffer_query_functions
= Qnil
;
5995 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
5996 doc
: /* Normal hook run before changing the major mode of a buffer.
5997 The function `kill-all-local-variables' runs this before doing anything else. */);
5998 Vchange_major_mode_hook
= Qnil
;
5999 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6001 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6002 doc
: /* Hook run when the buffer list changes.
6003 Functions running this hook are `get-buffer-create',
6004 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6005 and `bury-buffer-internal'. */);
6006 Vbuffer_list_update_hook
= Qnil
;
6007 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6009 defsubr (&Sbuffer_live_p
);
6010 defsubr (&Sbuffer_list
);
6011 defsubr (&Sget_buffer
);
6012 defsubr (&Sget_file_buffer
);
6013 defsubr (&Sget_buffer_create
);
6014 defsubr (&Smake_indirect_buffer
);
6015 defsubr (&Sgenerate_new_buffer_name
);
6016 defsubr (&Sbuffer_name
);
6017 /*defsubr (&Sbuffer_number);*/
6018 defsubr (&Sbuffer_file_name
);
6019 defsubr (&Sbuffer_base_buffer
);
6020 defsubr (&Sbuffer_local_value
);
6021 defsubr (&Sbuffer_local_variables
);
6022 defsubr (&Sbuffer_modified_p
);
6023 defsubr (&Sset_buffer_modified_p
);
6024 defsubr (&Sbuffer_modified_tick
);
6025 defsubr (&Sbuffer_chars_modified_tick
);
6026 defsubr (&Srename_buffer
);
6027 defsubr (&Sother_buffer
);
6028 defsubr (&Sbuffer_enable_undo
);
6029 defsubr (&Skill_buffer
);
6030 defsubr (&Sbury_buffer_internal
);
6031 defsubr (&Sset_buffer_major_mode
);
6032 defsubr (&Scurrent_buffer
);
6033 defsubr (&Sset_buffer
);
6034 defsubr (&Sbarf_if_buffer_read_only
);
6035 defsubr (&Serase_buffer
);
6036 defsubr (&Sbuffer_swap_text
);
6037 defsubr (&Sset_buffer_multibyte
);
6038 defsubr (&Skill_all_local_variables
);
6040 defsubr (&Soverlayp
);
6041 defsubr (&Smake_overlay
);
6042 defsubr (&Sdelete_overlay
);
6043 defsubr (&Smove_overlay
);
6044 defsubr (&Soverlay_start
);
6045 defsubr (&Soverlay_end
);
6046 defsubr (&Soverlay_buffer
);
6047 defsubr (&Soverlay_properties
);
6048 defsubr (&Soverlays_at
);
6049 defsubr (&Soverlays_in
);
6050 defsubr (&Snext_overlay_change
);
6051 defsubr (&Sprevious_overlay_change
);
6052 defsubr (&Soverlay_recenter
);
6053 defsubr (&Soverlay_lists
);
6054 defsubr (&Soverlay_get
);
6055 defsubr (&Soverlay_put
);
6056 defsubr (&Srestore_buffer_modified_p
);
6060 keys_of_buffer (void)
6062 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6063 initial_define_key (control_x_map
, 'k', "kill-buffer");
6065 /* This must not be in syms_of_buffer, because Qdisabled is not
6066 initialized when that function gets called. */
6067 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);