1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2011 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
);
275 return call2 (handler
, Qget_file_buffer
, filename
);
277 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
279 buf
= Fcdr (XCAR (tail
));
280 if (!BUFFERP (buf
)) continue;
281 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
282 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
290 get_truename_buffer (register Lisp_Object filename
)
292 register Lisp_Object tail
, buf
, tem
;
294 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
296 buf
= Fcdr (XCAR (tail
));
297 if (!BUFFERP (buf
)) continue;
298 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
299 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
306 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
307 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
308 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
309 return that buffer. If no such buffer exists, create a new buffer with
310 that name and return it. If BUFFER-OR-NAME starts with a space, the new
311 buffer does not keep undo information.
313 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
314 even if it is dead. The return value is never nil. */)
315 (register Lisp_Object buffer_or_name
)
317 register Lisp_Object buffer
, name
;
318 register struct buffer
*b
;
320 buffer
= Fget_buffer (buffer_or_name
);
324 if (SCHARS (buffer_or_name
) == 0)
325 error ("Empty string for buffer name is not allowed");
327 b
= allocate_buffer ();
329 /* An ordinary buffer uses its own struct buffer_text. */
330 b
->text
= &b
->own_text
;
333 BUF_GAP_SIZE (b
) = 20;
335 /* We allocate extra 1-byte at the tail and keep it always '\0' for
336 anchoring a search. */
337 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
339 if (! BUF_BEG_ADDR (b
))
340 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
345 b
->pt_byte
= BEG_BYTE
;
346 b
->begv_byte
= BEG_BYTE
;
347 b
->zv_byte
= BEG_BYTE
;
350 BUF_GPT_BYTE (b
) = BEG_BYTE
;
353 BUF_Z_BYTE (b
) = BEG_BYTE
;
355 BUF_CHARS_MODIFF (b
) = 1;
356 BUF_OVERLAY_MODIFF (b
) = 1;
357 BUF_SAVE_MODIFF (b
) = 1;
358 BUF_INTERVALS (b
) = 0;
359 BUF_UNCHANGED_MODIFIED (b
) = 1;
360 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
361 BUF_END_UNCHANGED (b
) = 0;
362 BUF_BEG_UNCHANGED (b
) = 0;
363 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
364 b
->text
->inhibit_shrinking
= 0;
366 b
->newline_cache
= 0;
367 b
->width_run_cache
= 0;
368 BVAR (b
, width_table
) = Qnil
;
369 b
->prevent_redisplay_optimizations_p
= 1;
371 /* Put this on the chain of all buffers including killed ones. */
372 b
->header
.next
.buffer
= all_buffers
;
375 /* An ordinary buffer normally doesn't need markers
376 to handle BEGV and ZV. */
377 BVAR (b
, pt_marker
) = Qnil
;
378 BVAR (b
, begv_marker
) = Qnil
;
379 BVAR (b
, zv_marker
) = Qnil
;
381 name
= Fcopy_sequence (buffer_or_name
);
382 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
383 BVAR (b
, name
) = name
;
385 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
388 reset_buffer_local_variables (b
, 1);
390 BVAR (b
, mark
) = Fmake_marker ();
391 BUF_MARKERS (b
) = NULL
;
392 BVAR (b
, name
) = name
;
394 /* Put this in the alist of all live buffers. */
395 XSETBUFFER (buffer
, b
);
396 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
397 /* And run buffer-list-update-hook. */
398 if (!NILP (Vrun_hooks
))
399 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
401 /* An error in calling the function here (should someone redefine it)
402 can lead to infinite regress until you run out of stack. rms
403 says that's not worth protecting against. */
404 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
405 /* buffer is on buffer-alist, so no gcpro. */
406 call1 (Qucs_set_table_for_input
, buffer
);
412 /* Return a list of overlays which is a copy of the overlay list
413 LIST, but for buffer B. */
415 static struct Lisp_Overlay
*
416 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
419 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
421 XSETBUFFER (buffer
, b
);
423 for (; list
; list
= list
->next
)
425 Lisp_Object overlay
, start
, end
, old_overlay
;
428 XSETMISC (old_overlay
, list
);
429 charpos
= marker_position (OVERLAY_START (old_overlay
));
430 start
= Fmake_marker ();
431 Fset_marker (start
, make_number (charpos
), buffer
);
432 XMARKER (start
)->insertion_type
433 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
435 charpos
= marker_position (OVERLAY_END (old_overlay
));
436 end
= Fmake_marker ();
437 Fset_marker (end
, make_number (charpos
), buffer
);
438 XMARKER (end
)->insertion_type
439 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
441 overlay
= allocate_misc ();
442 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
443 OVERLAY_START (overlay
) = start
;
444 OVERLAY_END (overlay
) = end
;
445 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
446 XOVERLAY (overlay
)->next
= NULL
;
449 tail
= tail
->next
= XOVERLAY (overlay
);
451 result
= tail
= XOVERLAY (overlay
);
458 /* Clone per-buffer values of buffer FROM.
460 Buffer TO gets the same per-buffer values as FROM, with the
461 following exceptions: (1) TO's name is left untouched, (2) markers
462 are copied and made to refer to TO, and (3) overlay lists are
466 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
468 Lisp_Object to_buffer
;
471 XSETBUFFER (to_buffer
, to
);
473 /* buffer-local Lisp variables start at `undo_list',
474 tho only the ones from `name' on are GC'd normally. */
475 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
476 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
477 offset
+= sizeof (Lisp_Object
))
481 /* Don't touch the `name' which should be unique for every buffer. */
482 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
485 obj
= PER_BUFFER_VALUE (from
, offset
);
486 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
488 struct Lisp_Marker
*m
= XMARKER (obj
);
489 obj
= Fmake_marker ();
490 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
491 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
494 PER_BUFFER_VALUE (to
, offset
) = obj
;
497 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
499 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
500 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
502 /* Get (a copy of) the alist of Lisp-level local variables of FROM
503 and install that in TO. */
504 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
508 /* If buffer B has markers to record PT, BEGV and ZV when it is not
509 current, update these markers. */
512 record_buffer_markers (struct buffer
*b
)
514 if (! NILP (BVAR (b
, pt_marker
)))
518 eassert (!NILP (BVAR (b
, begv_marker
)));
519 eassert (!NILP (BVAR (b
, zv_marker
)));
521 XSETBUFFER (buffer
, b
);
522 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
523 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
524 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
529 /* If buffer B has markers to record PT, BEGV and ZV when it is not
530 current, fetch these values into B->begv etc. */
533 fetch_buffer_markers (struct buffer
*b
)
535 if (! NILP (BVAR (b
, pt_marker
)))
539 eassert (!NILP (BVAR (b
, begv_marker
)));
540 eassert (!NILP (BVAR (b
, zv_marker
)));
542 m
= BVAR (b
, pt_marker
);
543 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
545 m
= BVAR (b
, begv_marker
);
546 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
548 m
= BVAR (b
, zv_marker
);
549 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
554 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
556 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
557 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
558 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
559 NAME should be a string which is not the name of an existing buffer.
560 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
561 such as major and minor modes, in the indirect buffer.
562 CLONE nil means the indirect buffer's state is reset to default values. */)
563 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
565 Lisp_Object buf
, tem
;
569 buf
= Fget_buffer (name
);
571 error ("Buffer name `%s' is in use", SDATA (name
));
574 base_buffer
= Fget_buffer (base_buffer
);
575 if (NILP (base_buffer
))
576 error ("No such buffer: `%s'", SDATA (tem
));
577 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
578 error ("Base buffer has been killed");
580 if (SCHARS (name
) == 0)
581 error ("Empty string for buffer name is not allowed");
583 b
= allocate_buffer ();
585 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
586 ? XBUFFER (base_buffer
)->base_buffer
587 : XBUFFER (base_buffer
));
589 /* Use the base buffer's text object. */
590 b
->text
= b
->base_buffer
->text
;
592 b
->pt
= b
->base_buffer
->pt
;
593 b
->begv
= b
->base_buffer
->begv
;
594 b
->zv
= b
->base_buffer
->zv
;
595 b
->pt_byte
= b
->base_buffer
->pt_byte
;
596 b
->begv_byte
= b
->base_buffer
->begv_byte
;
597 b
->zv_byte
= b
->base_buffer
->zv_byte
;
599 b
->newline_cache
= 0;
600 b
->width_run_cache
= 0;
601 BVAR (b
, width_table
) = Qnil
;
603 /* Put this on the chain of all buffers including killed ones. */
604 b
->header
.next
.buffer
= all_buffers
;
607 name
= Fcopy_sequence (name
);
608 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
609 BVAR (b
, name
) = name
;
612 reset_buffer_local_variables (b
, 1);
614 /* Put this in the alist of all live buffers. */
616 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
618 BVAR (b
, mark
) = Fmake_marker ();
619 BVAR (b
, name
) = name
;
621 /* The multibyte status belongs to the base buffer. */
622 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
624 /* Make sure the base buffer has markers for its narrowing. */
625 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
627 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
628 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
630 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
631 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
633 b
->base_buffer
->pt_byte
);
635 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
636 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
637 b
->base_buffer
->begv
,
638 b
->base_buffer
->begv_byte
);
640 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
641 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
643 b
->base_buffer
->zv_byte
);
644 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
649 /* Give the indirect buffer markers for its narrowing. */
650 BVAR (b
, pt_marker
) = Fmake_marker ();
651 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
652 BVAR (b
, begv_marker
) = Fmake_marker ();
653 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
654 BVAR (b
, zv_marker
) = Fmake_marker ();
655 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
656 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
660 struct buffer
*old_b
= current_buffer
;
662 clone_per_buffer_values (b
->base_buffer
, b
);
663 BVAR (b
, filename
) = Qnil
;
664 BVAR (b
, file_truename
) = Qnil
;
665 BVAR (b
, display_count
) = make_number (0);
666 BVAR (b
, backed_up
) = Qnil
;
667 BVAR (b
, auto_save_file_name
) = Qnil
;
668 set_buffer_internal_1 (b
);
669 Fset (intern ("buffer-save-without-query"), Qnil
);
670 Fset (intern ("buffer-file-number"), Qnil
);
671 Fset (intern ("buffer-stale-function"), Qnil
);
672 set_buffer_internal_1 (old_b
);
675 /* Run buffer-list-update-hook. */
676 if (!NILP (Vrun_hooks
))
677 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
683 delete_all_overlays (struct buffer
*b
)
687 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
688 have to empty the list, otherwise we end up with overlays that
689 think they belong to this buffer while the buffer doesn't know about
691 while (b
->overlays_before
)
693 XSETMISC (overlay
, b
->overlays_before
);
694 Fdelete_overlay (overlay
);
696 while (b
->overlays_after
)
698 XSETMISC (overlay
, b
->overlays_after
);
699 Fdelete_overlay (overlay
);
701 eassert (b
->overlays_before
== NULL
);
702 eassert (b
->overlays_after
== NULL
);
705 /* Reinitialize everything about a buffer except its name and contents
707 If called on an already-initialized buffer, the list of overlays
708 should be deleted before calling this function, otherwise we end up
709 with overlays that claim to belong to the buffer but the buffer
710 claims it doesn't belong to it. */
713 reset_buffer (register struct buffer
*b
)
715 BVAR (b
, filename
) = Qnil
;
716 BVAR (b
, file_truename
) = Qnil
;
717 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
719 b
->modtime_size
= -1;
720 XSETFASTINT (BVAR (b
, save_length
), 0);
721 b
->last_window_start
= 1;
722 /* It is more conservative to start out "changed" than "unchanged". */
724 b
->prevent_redisplay_optimizations_p
= 1;
725 BVAR (b
, backed_up
) = Qnil
;
726 BUF_AUTOSAVE_MODIFF (b
) = 0;
727 b
->auto_save_failure_time
= -1;
728 BVAR (b
, auto_save_file_name
) = Qnil
;
729 BVAR (b
, read_only
) = Qnil
;
730 b
->overlays_before
= NULL
;
731 b
->overlays_after
= NULL
;
732 b
->overlay_center
= BEG
;
733 BVAR (b
, mark_active
) = Qnil
;
734 BVAR (b
, point_before_scroll
) = Qnil
;
735 BVAR (b
, file_format
) = Qnil
;
736 BVAR (b
, auto_save_file_format
) = Qt
;
737 BVAR (b
, last_selected_window
) = Qnil
;
738 XSETINT (BVAR (b
, display_count
), 0);
739 BVAR (b
, display_time
) = Qnil
;
740 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
741 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
742 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
744 b
->display_error_modiff
= 0;
747 /* Reset buffer B's local variables info.
748 Don't use this on a buffer that has already been in use;
749 it does not treat permanent locals consistently.
750 Instead, use Fkill_all_local_variables.
752 If PERMANENT_TOO is 1, then we reset permanent
753 buffer-local variables. If PERMANENT_TOO is 0,
754 we preserve those. */
757 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
762 /* Reset the major mode to Fundamental, together with all the
763 things that depend on the major mode.
764 default-major-mode is handled at a higher level.
765 We ignore it here. */
766 BVAR (b
, major_mode
) = Qfundamental_mode
;
767 BVAR (b
, keymap
) = Qnil
;
768 BVAR (b
, mode_name
) = QSFundamental
;
769 BVAR (b
, minor_modes
) = Qnil
;
771 /* If the standard case table has been altered and invalidated,
772 fix up its insides first. */
773 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
774 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
775 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
776 Fset_standard_case_table (Vascii_downcase_table
);
778 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
779 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
780 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
781 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
782 BVAR (b
, invisibility_spec
) = Qt
;
784 /* Reset all (or most) per-buffer variables to their defaults. */
786 BVAR (b
, local_var_alist
) = Qnil
;
789 Lisp_Object tmp
, prop
, last
= Qnil
;
790 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
791 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
793 /* If permanent-local, keep it. */
795 if (EQ (prop
, Qpermanent_local_hook
))
797 /* This is a partially permanent hook variable.
798 Preserve only the elements that want to be preserved. */
799 Lisp_Object list
, newlist
;
800 list
= XCDR (XCAR (tmp
));
804 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
806 Lisp_Object elt
= XCAR (list
);
807 /* Preserve element ELT if it's t,
808 if it is a function with a `permanent-local-hook' property,
809 or if it's not a symbol. */
812 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
813 newlist
= Fcons (elt
, newlist
);
815 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
818 /* Delete this local variable. */
819 else if (NILP (last
))
820 BVAR (b
, local_var_alist
) = XCDR (tmp
);
822 XSETCDR (last
, XCDR (tmp
));
825 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
826 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
827 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
829 /* For each slot that has a default value,
830 copy that into the slot. */
832 /* buffer-local Lisp variables start at `undo_list',
833 tho only the ones from `name' on are GC'd normally. */
834 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
835 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
836 offset
+= sizeof (Lisp_Object
))
838 int idx
= PER_BUFFER_IDX (offset
);
841 || buffer_permanent_local_flags
[idx
] == 0)))
842 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
846 /* We split this away from generate-new-buffer, because rename-buffer
847 and set-visited-file-name ought to be able to use this to really
848 rename the buffer properly. */
850 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
851 Sgenerate_new_buffer_name
, 1, 2, 0,
852 doc
: /* Return a string that is the name of no existing buffer based on NAME.
853 If there is no live buffer named NAME, then return NAME.
854 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
855 \(starting at 2) until an unused name is found, and then return that name.
856 Optional second argument IGNORE specifies a name that is okay to use (if
857 it is in the sequence to be tried) even if a buffer with that name exists. */)
858 (register Lisp_Object name
, Lisp_Object ignore
)
860 register Lisp_Object gentemp
, tem
;
862 char number
[INT_BUFSIZE_BOUND (EMACS_INT
) + sizeof "<>"];
866 tem
= Fstring_equal (name
, ignore
);
869 tem
= Fget_buffer (name
);
876 sprintf (number
, "<%"pI
"d>", ++count
);
877 gentemp
= concat2 (name
, build_string (number
));
878 tem
= Fstring_equal (gentemp
, ignore
);
881 tem
= Fget_buffer (gentemp
);
888 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
889 doc
: /* Return the name of BUFFER, as a string.
890 BUFFER defaults to the current buffer.
891 Return nil if BUFFER has been killed. */)
892 (register Lisp_Object buffer
)
895 return BVAR (current_buffer
, name
);
896 CHECK_BUFFER (buffer
);
897 return BVAR (XBUFFER (buffer
), name
);
900 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
901 doc
: /* Return name of file BUFFER is visiting, or nil if none.
902 No argument or nil as argument means use the current buffer. */)
903 (register Lisp_Object buffer
)
906 return BVAR (current_buffer
, filename
);
907 CHECK_BUFFER (buffer
);
908 return BVAR (XBUFFER (buffer
), filename
);
911 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
913 doc
: /* Return the base buffer of indirect buffer BUFFER.
914 If BUFFER is not indirect, return nil.
915 BUFFER defaults to the current buffer. */)
916 (register Lisp_Object buffer
)
919 Lisp_Object base_buffer
;
922 base
= current_buffer
->base_buffer
;
925 CHECK_BUFFER (buffer
);
926 base
= XBUFFER (buffer
)->base_buffer
;
931 XSETBUFFER (base_buffer
, base
);
935 DEFUN ("buffer-local-value", Fbuffer_local_value
,
936 Sbuffer_local_value
, 2, 2, 0,
937 doc
: /* Return the value of VARIABLE in BUFFER.
938 If VARIABLE does not have a buffer-local binding in BUFFER, the value
939 is the default binding of the variable. */)
940 (register Lisp_Object variable
, register Lisp_Object buffer
)
942 register struct buffer
*buf
;
943 register Lisp_Object result
;
944 struct Lisp_Symbol
*sym
;
946 CHECK_SYMBOL (variable
);
947 CHECK_BUFFER (buffer
);
948 buf
= XBUFFER (buffer
);
949 sym
= XSYMBOL (variable
);
952 switch (sym
->redirect
)
954 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
955 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
956 case SYMBOL_LOCALIZED
:
957 { /* Look in local_var_alist. */
958 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
959 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
960 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
964 { /* What binding is loaded right now? */
965 Lisp_Object current_alist_element
= blv
->valcell
;
967 /* The value of the currently loaded binding is not
968 stored in it, but rather in the realvalue slot.
969 Store that value into the binding it belongs to
970 in case that is the one we are about to use. */
972 XSETCDR (current_alist_element
,
973 do_symval_forwarding (blv
->fwd
));
975 /* Now get the (perhaps updated) value out of the binding. */
976 result
= XCDR (result
);
979 result
= Fdefault_value (variable
);
982 case SYMBOL_FORWARDED
:
984 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
985 if (BUFFER_OBJFWDP (fwd
))
986 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
988 result
= Fdefault_value (variable
);
994 if (!EQ (result
, Qunbound
))
997 xsignal1 (Qvoid_variable
, variable
);
1000 /* Return an alist of the Lisp-level buffer-local bindings of
1001 buffer BUF. That is, don't include the variables maintained
1002 in special slots in the buffer object. */
1005 buffer_lisp_local_variables (struct buffer
*buf
)
1007 Lisp_Object result
= Qnil
;
1008 register Lisp_Object tail
;
1009 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1011 Lisp_Object val
, elt
;
1015 /* Reference each variable in the alist in buf.
1016 If inquiring about the current buffer, this gets the current values,
1017 so store them into the alist so the alist is up to date.
1018 If inquiring about some other buffer, this swaps out any values
1019 for that buffer, making the alist up to date automatically. */
1020 val
= find_symbol_value (XCAR (elt
));
1021 /* Use the current buffer value only if buf is the current buffer. */
1022 if (buf
!= current_buffer
)
1025 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
1031 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1032 Sbuffer_local_variables
, 0, 1, 0,
1033 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1034 Most elements look like (SYMBOL . VALUE), describing one variable.
1035 For a symbol that is locally unbound, just the symbol appears in the value.
1036 Note that storing new VALUEs in these elements doesn't change the variables.
1037 No argument or nil as argument means use current buffer as BUFFER. */)
1038 (register Lisp_Object buffer
)
1040 register struct buffer
*buf
;
1041 register Lisp_Object result
;
1044 buf
= current_buffer
;
1047 CHECK_BUFFER (buffer
);
1048 buf
= XBUFFER (buffer
);
1051 result
= buffer_lisp_local_variables (buf
);
1053 /* Add on all the variables stored in special slots. */
1057 /* buffer-local Lisp variables start at `undo_list',
1058 tho only the ones from `name' on are GC'd normally. */
1059 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
1060 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
1061 /* sizeof EMACS_INT == sizeof Lisp_Object */
1062 offset
+= (sizeof (EMACS_INT
)))
1064 idx
= PER_BUFFER_IDX (offset
);
1065 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1066 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1067 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1068 PER_BUFFER_VALUE (buf
, offset
)),
1076 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1078 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1079 No argument or nil as argument means use current buffer as BUFFER. */)
1080 (register Lisp_Object buffer
)
1082 register struct buffer
*buf
;
1084 buf
= current_buffer
;
1087 CHECK_BUFFER (buffer
);
1088 buf
= XBUFFER (buffer
);
1091 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1094 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1096 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1097 A non-nil FLAG means mark the buffer modified. */)
1098 (register Lisp_Object flag
)
1100 register int already
;
1101 register Lisp_Object fn
;
1102 Lisp_Object buffer
, window
;
1104 #ifdef CLASH_DETECTION
1105 /* If buffer becoming modified, lock the file.
1106 If buffer becoming unmodified, unlock the file. */
1108 fn
= BVAR (current_buffer
, file_truename
);
1109 /* Test buffer-file-name so that binding it to nil is effective. */
1110 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1112 already
= SAVE_MODIFF
< MODIFF
;
1113 if (!already
&& !NILP (flag
))
1115 else if (already
&& NILP (flag
))
1118 #endif /* CLASH_DETECTION */
1120 /* Here we have a problem. SAVE_MODIFF is used here to encode
1121 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1122 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1123 modify SAVE_MODIFF to affect one, we may affect the other
1125 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1126 if SAVE_MODIFF<auto_save_modified that means we risk changing
1127 recent-auto-save-p from t to nil.
1128 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1129 we risk changing recent-auto-save-p from nil to t. */
1130 SAVE_MODIFF
= (NILP (flag
)
1131 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1133 /* Let's try to preserve recent-auto-save-p. */
1134 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1135 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1136 we can either decrease SAVE_MODIFF and auto_save_modified
1137 or increase MODIFF. */
1140 /* Set update_mode_lines only if buffer is displayed in some window.
1141 Packages like jit-lock or lazy-lock preserve a buffer's modified
1142 state by recording/restoring the state around blocks of code.
1143 Setting update_mode_lines makes redisplay consider all windows
1144 (on all frames). Stealth fontification of buffers not displayed
1145 would incur additional redisplay costs if we'd set
1146 update_modes_lines unconditionally.
1148 Ideally, I think there should be another mechanism for fontifying
1149 buffers without "modifying" buffers, or redisplay should be
1150 smarter about updating the `*' in mode lines. --gerd */
1151 XSETBUFFER (buffer
, current_buffer
);
1152 window
= Fget_buffer_window (buffer
, Qt
);
1153 if (WINDOWP (window
))
1155 ++update_mode_lines
;
1156 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1162 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1163 Srestore_buffer_modified_p
, 1, 1, 0,
1164 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1165 It is not ensured that mode lines will be updated to show the modified
1166 state of the current buffer. Use with care. */)
1169 #ifdef CLASH_DETECTION
1172 /* If buffer becoming modified, lock the file.
1173 If buffer becoming unmodified, unlock the file. */
1175 fn
= BVAR (current_buffer
, file_truename
);
1176 /* Test buffer-file-name so that binding it to nil is effective. */
1177 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1179 int already
= SAVE_MODIFF
< MODIFF
;
1180 if (!already
&& !NILP (flag
))
1182 else if (already
&& NILP (flag
))
1185 #endif /* CLASH_DETECTION */
1187 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1191 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1193 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1194 Each buffer has a tick counter which is incremented each time the
1195 text in that buffer is changed. It wraps around occasionally.
1196 No argument or nil as argument means use current buffer as BUFFER. */)
1197 (register Lisp_Object buffer
)
1199 register struct buffer
*buf
;
1201 buf
= current_buffer
;
1204 CHECK_BUFFER (buffer
);
1205 buf
= XBUFFER (buffer
);
1208 return make_number (BUF_MODIFF (buf
));
1211 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1212 Sbuffer_chars_modified_tick
, 0, 1, 0,
1213 doc
: /* Return BUFFER's character-change tick counter.
1214 Each buffer has a character-change tick counter, which is set to the
1215 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1216 time text in that buffer is inserted or deleted. By comparing the
1217 values returned by two individual calls of `buffer-chars-modified-tick',
1218 you can tell whether a character change occurred in that buffer in
1219 between these calls. No argument or nil as argument means use current
1220 buffer as BUFFER. */)
1221 (register Lisp_Object buffer
)
1223 register struct buffer
*buf
;
1225 buf
= current_buffer
;
1228 CHECK_BUFFER (buffer
);
1229 buf
= XBUFFER (buffer
);
1232 return make_number (BUF_CHARS_MODIFF (buf
));
1235 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1236 "(list (read-string \"Rename buffer (to new name): \" \
1237 nil 'buffer-name-history (buffer-name (current-buffer))) \
1238 current-prefix-arg)",
1239 doc
: /* Change current buffer's name to NEWNAME (a string).
1240 If second arg UNIQUE is nil or omitted, it is an error if a
1241 buffer named NEWNAME already exists.
1242 If UNIQUE is non-nil, come up with a new name using
1243 `generate-new-buffer-name'.
1244 Interactively, you can set UNIQUE with a prefix argument.
1245 We return the name we actually gave the buffer.
1246 This does not change the name of the visited file (if any). */)
1247 (register Lisp_Object newname
, Lisp_Object unique
)
1249 register Lisp_Object tem
, buf
;
1251 CHECK_STRING (newname
);
1253 if (SCHARS (newname
) == 0)
1254 error ("Empty string is invalid as a buffer name");
1256 tem
= Fget_buffer (newname
);
1259 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1260 rename the buffer automatically so you can create another
1261 with the original name. It makes UNIQUE equivalent to
1262 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1263 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1264 return BVAR (current_buffer
, name
);
1266 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1268 error ("Buffer name `%s' is in use", SDATA (newname
));
1271 BVAR (current_buffer
, name
) = newname
;
1273 /* Catch redisplay's attention. Unless we do this, the mode lines for
1274 any windows displaying current_buffer will stay unchanged. */
1275 update_mode_lines
++;
1277 XSETBUFFER (buf
, current_buffer
);
1278 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1279 if (NILP (BVAR (current_buffer
, filename
))
1280 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1281 call0 (intern ("rename-auto-save-file"));
1283 /* Run buffer-list-update-hook. */
1284 if (!NILP (Vrun_hooks
))
1285 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1287 /* Refetch since that last call may have done GC. */
1288 return BVAR (current_buffer
, name
);
1291 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1292 doc
: /* Return most recently selected buffer other than BUFFER.
1293 Buffers not visible in windows are preferred to visible buffers, unless
1294 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1295 BUFFER unless it denotes a live buffer. If the optional third argument
1296 FRAME is non-nil, use that frame's buffer list instead of the selected
1297 frame's buffer list.
1299 The buffer is found by scanning the selected or specified frame's buffer
1300 list first, followed by the list of all buffers. If no other buffer
1301 exists, return the buffer `*scratch*' (creating it if necessary). */)
1302 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1304 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1305 Lisp_Object tail
, buf
, pred
;
1306 Lisp_Object notsogood
= Qnil
;
1309 frame
= selected_frame
;
1311 CHECK_FRAME (frame
);
1313 pred
= frame_buffer_predicate (frame
);
1314 /* Consider buffers that have been seen in the frame first. */
1315 tail
= XFRAME (frame
)->buffer_list
;
1316 for (; CONSP (tail
); tail
= XCDR (tail
))
1319 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1320 && !NILP (BVAR (XBUFFER (buf
), name
))
1321 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1322 /* If the frame has a buffer_predicate, disregard buffers that
1323 don't fit the predicate. */
1324 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1326 if (!NILP (visible_ok
)
1327 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1329 else if (NILP (notsogood
))
1334 /* Consider alist of all buffers next. */
1335 tail
= Vbuffer_alist
;
1336 for (; CONSP (tail
); tail
= XCDR (tail
))
1338 buf
= Fcdr (XCAR (tail
));
1339 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1340 && !NILP (BVAR (XBUFFER (buf
), name
))
1341 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1342 /* If the frame has a buffer_predicate, disregard buffers that
1343 don't fit the predicate. */
1344 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1346 if (!NILP (visible_ok
)
1347 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1349 else if (NILP (notsogood
))
1354 if (!NILP (notsogood
))
1358 buf
= Fget_buffer (build_string ("*scratch*"));
1361 buf
= Fget_buffer_create (build_string ("*scratch*"));
1362 Fset_buffer_major_mode (buf
);
1368 /* The following function is a safe variant of Fother_buffer: It doesn't
1369 pay attention to any frame-local buffer lists, doesn't care about
1370 visibility of buffers, and doesn't evaluate any frame predicates. */
1373 other_buffer_safely (Lisp_Object buffer
)
1375 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1376 Lisp_Object tail
, buf
;
1378 tail
= Vbuffer_alist
;
1379 for (; CONSP (tail
); tail
= XCDR (tail
))
1381 buf
= Fcdr (XCAR (tail
));
1382 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1383 && !NILP (BVAR (XBUFFER (buf
), name
))
1384 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1388 buf
= Fget_buffer (build_string ("*scratch*"));
1391 buf
= Fget_buffer_create (build_string ("*scratch*"));
1392 Fset_buffer_major_mode (buf
);
1398 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1400 doc
: /* Start keeping undo information for buffer BUFFER.
1401 No argument or nil as argument means do this for the current buffer. */)
1402 (register Lisp_Object buffer
)
1404 Lisp_Object real_buffer
;
1407 XSETBUFFER (real_buffer
, current_buffer
);
1410 real_buffer
= Fget_buffer (buffer
);
1411 if (NILP (real_buffer
))
1415 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1416 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1422 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1423 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1424 The buffer being killed will be current while the hook is running.\n\
1427 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1428 doc
: /* Kill buffer BUFFER-OR-NAME.
1429 The argument may be a buffer or the name of an existing buffer.
1430 Argument nil or omitted means kill the current buffer. Return t if the
1431 buffer is actually killed, nil otherwise.
1433 This function calls `replace-buffer-in-windows' for cleaning up all
1434 windows currently displaying the buffer to be killed. The functions in
1435 `kill-buffer-query-functions' are called with the buffer to be killed as
1436 the current buffer. If any of them returns nil, the buffer is not
1437 killed. The hook `kill-buffer-hook' is run before the buffer is
1438 actually killed. The buffer being killed will be current while the hook
1441 Any processes that have this buffer as the `process-buffer' are killed
1443 (Lisp_Object buffer_or_name
)
1446 register struct buffer
*b
;
1447 register Lisp_Object tem
;
1448 register struct Lisp_Marker
*m
;
1449 struct gcpro gcpro1
;
1451 if (NILP (buffer_or_name
))
1452 buffer
= Fcurrent_buffer ();
1454 buffer
= Fget_buffer (buffer_or_name
);
1456 nsberror (buffer_or_name
);
1458 b
= XBUFFER (buffer
);
1460 /* Avoid trouble for buffer already dead. */
1461 if (NILP (BVAR (b
, name
)))
1464 /* Query if the buffer is still modified. */
1465 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1466 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1469 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1470 BVAR (b
, name
), make_number (0)));
1476 /* Run hooks with the buffer to be killed the current buffer. */
1478 int count
= SPECPDL_INDEX ();
1479 Lisp_Object arglist
[1];
1481 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1482 set_buffer_internal (b
);
1484 /* First run the query functions; if any query is answered no,
1485 don't kill the buffer. */
1486 arglist
[0] = Qkill_buffer_query_functions
;
1487 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1489 return unbind_to (count
, Qnil
);
1491 /* Then run the hooks. */
1492 Frun_hooks (1, &Qkill_buffer_hook
);
1493 unbind_to (count
, Qnil
);
1496 /* We have no more questions to ask. Verify that it is valid
1497 to kill the buffer. This must be done after the questions
1498 since anything can happen within do_yes_or_no_p. */
1500 /* Don't kill the minibuffer now current. */
1501 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1504 if (NILP (BVAR (b
, name
)))
1507 /* When we kill a base buffer, kill all its indirect buffers.
1508 We do it at this stage so nothing terrible happens if they
1509 ask questions or their hooks get errors. */
1510 if (! b
->base_buffer
)
1512 struct buffer
*other
;
1516 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1517 /* all_buffers contains dead buffers too;
1518 don't re-kill them. */
1519 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1522 XSETBUFFER (buf
, other
);
1529 /* Make this buffer not be current.
1530 In the process, notice if this is the sole visible buffer
1531 and give up if so. */
1532 if (b
== current_buffer
)
1534 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1536 if (b
== current_buffer
)
1540 /* Notice if the buffer to kill is the sole visible buffer
1541 when we're currently in the mini-buffer, and give up if so. */
1542 XSETBUFFER (tem
, current_buffer
);
1543 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1545 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1546 if (EQ (buffer
, tem
))
1550 /* Now there is no question: we can kill the buffer. */
1552 #ifdef CLASH_DETECTION
1553 /* Unlock this buffer's file, if it is locked. */
1555 #endif /* CLASH_DETECTION */
1558 kill_buffer_processes (buffer
);
1561 /* Killing buffer processes may run sentinels which may
1562 have called kill-buffer. */
1564 if (NILP (BVAR (b
, name
)))
1567 /* These may run Lisp code and into infinite loops (if someone
1568 insisted on circular lists) so allow quitting here. */
1569 replace_buffer_in_windows (buffer
);
1570 frames_discard_buffer (buffer
);
1572 clear_charpos_cache (b
);
1574 tem
= Vinhibit_quit
;
1576 /* Remove the buffer from the list of all buffers. */
1577 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1578 /* If replace_buffer_in_windows didn't do its job correctly fix that
1580 replace_buffer_in_windows_safely (buffer
);
1581 Vinhibit_quit
= tem
;
1583 /* Delete any auto-save file, if we saved it in this session.
1584 But not if the buffer is modified. */
1585 if (STRINGP (BVAR (b
, auto_save_file_name
))
1586 && BUF_AUTOSAVE_MODIFF (b
) != 0
1587 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1588 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1589 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1592 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1593 if (! NILP (delete))
1594 internal_delete_file (BVAR (b
, auto_save_file_name
));
1599 /* Unchain all markers that belong to this indirect buffer.
1600 Don't unchain the markers that belong to the base buffer
1601 or its other indirect buffers. */
1602 for (m
= BUF_MARKERS (b
); m
; )
1604 struct Lisp_Marker
*next
= m
->next
;
1612 /* Unchain all markers of this buffer and its indirect buffers.
1613 and leave them pointing nowhere. */
1614 for (m
= BUF_MARKERS (b
); m
; )
1616 struct Lisp_Marker
*next
= m
->next
;
1621 BUF_MARKERS (b
) = NULL
;
1622 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1624 /* Perhaps we should explicitly free the interval tree here... */
1627 /* Reset the local variables, so that this buffer's local values
1628 won't be protected from GC. They would be protected
1629 if they happened to remain encached in their symbols.
1630 This gets rid of them for certain. */
1631 swap_out_buffer_local_variables (b
);
1632 reset_buffer_local_variables (b
, 1);
1634 BVAR (b
, name
) = Qnil
;
1637 if (! b
->base_buffer
)
1638 free_buffer_text (b
);
1640 if (b
->newline_cache
)
1642 free_region_cache (b
->newline_cache
);
1643 b
->newline_cache
= 0;
1645 if (b
->width_run_cache
)
1647 free_region_cache (b
->width_run_cache
);
1648 b
->width_run_cache
= 0;
1650 BVAR (b
, width_table
) = Qnil
;
1652 BVAR (b
, undo_list
) = Qnil
;
1654 /* Run buffer-list-update-hook. */
1655 if (!NILP (Vrun_hooks
))
1656 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1661 /* Move association for BUFFER to the front of buffer (a)lists. Since
1662 we do this each time BUFFER is selected visibly, the more recently
1663 selected buffers are always closer to the front of those lists. This
1664 means that other_buffer is more likely to choose a relevant buffer.
1666 Note that this moves BUFFER to the front of the buffer lists of the
1667 selected frame even if BUFFER is not shown there. If BUFFER is not
1668 shown in the selected frame, consider the present behavior a feature.
1669 `select-window' gets this right since it shows BUFFER in the selected
1670 window when calling us. */
1673 record_buffer (Lisp_Object buffer
)
1675 Lisp_Object aelt
, aelt_cons
, tem
;
1676 register struct frame
*f
= XFRAME (selected_frame
);
1678 CHECK_BUFFER (buffer
);
1680 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1681 Don't allow quitting since this might leave the buffer list in an
1682 inconsistent state. */
1683 tem
= Vinhibit_quit
;
1685 aelt
= Frassq (buffer
, Vbuffer_alist
);
1686 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1687 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1688 XSETCDR (aelt_cons
, Vbuffer_alist
);
1689 Vbuffer_alist
= aelt_cons
;
1690 Vinhibit_quit
= tem
;
1692 /* Update buffer list of selected frame. */
1693 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1694 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1696 /* Run buffer-list-update-hook. */
1697 if (!NILP (Vrun_hooks
))
1698 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1701 DEFUN ("record-buffer", Frecord_buffer
, Srecord_buffer
, 1, 1, 0,
1702 doc
: /* Move BUFFER to the front of the buffer list.
1704 (Lisp_Object buffer
)
1706 CHECK_BUFFER (buffer
);
1708 record_buffer (buffer
);
1713 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1714 buffer is killed. For the selected frame's buffer list this moves
1715 BUFFER to its end even if it was never shown in that frame. If
1716 this happens we have a feature, hence `unrecord-buffer' should be
1717 called only when BUFFER was shown in the selected frame. */
1719 DEFUN ("unrecord-buffer", Funrecord_buffer
, Sunrecord_buffer
, 1, 1, 0,
1720 doc
: /* Move BUFFER to the end of the buffer list.
1722 (Lisp_Object buffer
)
1724 Lisp_Object aelt
, aelt_cons
, tem
;
1725 register struct frame
*f
= XFRAME (selected_frame
);
1727 CHECK_BUFFER (buffer
);
1729 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1730 Don't allow quitting since this might leave the buffer list in an
1731 inconsistent state. */
1732 tem
= Vinhibit_quit
;
1734 aelt
= Frassq (buffer
, Vbuffer_alist
);
1735 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1736 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1737 XSETCDR (aelt_cons
, Qnil
);
1738 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1739 Vinhibit_quit
= tem
;
1741 /* Update buffer lists of selected frame. */
1742 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1743 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1745 /* Run buffer-list-update-hook. */
1746 if (!NILP (Vrun_hooks
))
1747 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1752 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1753 doc
: /* Set an appropriate major mode for BUFFER.
1754 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1755 according to `default-major-mode'.
1756 Use this function before selecting the buffer, since it may need to inspect
1757 the current buffer's major mode. */)
1758 (Lisp_Object buffer
)
1761 Lisp_Object function
;
1763 CHECK_BUFFER (buffer
);
1765 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1766 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1767 function
= find_symbol_value (intern ("initial-major-mode"));
1770 function
= BVAR (&buffer_defaults
, major_mode
);
1772 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1773 function
= BVAR (current_buffer
, major_mode
);
1776 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1779 count
= SPECPDL_INDEX ();
1781 /* To select a nonfundamental mode,
1782 select the buffer temporarily and then call the mode function. */
1784 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1786 Fset_buffer (buffer
);
1789 return unbind_to (count
, Qnil
);
1792 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1793 doc
: /* Return the current buffer as a Lisp object. */)
1796 register Lisp_Object buf
;
1797 XSETBUFFER (buf
, current_buffer
);
1801 /* Set the current buffer to B.
1803 We previously set windows_or_buffers_changed here to invalidate
1804 global unchanged information in beg_unchanged and end_unchanged.
1805 This is no longer necessary because we now compute unchanged
1806 information on a buffer-basis. Every action affecting other
1807 windows than the selected one requires a select_window at some
1808 time, and that increments windows_or_buffers_changed. */
1811 set_buffer_internal (register struct buffer
*b
)
1813 if (current_buffer
!= b
)
1814 set_buffer_internal_1 (b
);
1817 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1818 This is used by redisplay. */
1821 set_buffer_internal_1 (register struct buffer
*b
)
1823 register struct buffer
*old_buf
;
1824 register Lisp_Object tail
;
1826 #ifdef USE_MMAP_FOR_BUFFERS
1827 if (b
->text
->beg
== NULL
)
1828 enlarge_buffer_text (b
, 0);
1829 #endif /* USE_MMAP_FOR_BUFFERS */
1831 if (current_buffer
== b
)
1834 old_buf
= current_buffer
;
1836 last_known_column_point
= -1; /* invalidate indentation cache */
1840 /* Put the undo list back in the base buffer, so that it appears
1841 that an indirect buffer shares the undo list of its base. */
1842 if (old_buf
->base_buffer
)
1843 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1845 /* If the old current buffer has markers to record PT, BEGV and ZV
1846 when it is not current, update them now. */
1847 record_buffer_markers (old_buf
);
1850 /* Get the undo list from the base buffer, so that it appears
1851 that an indirect buffer shares the undo list of its base. */
1853 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1855 /* If the new current buffer has markers to record PT, BEGV and ZV
1856 when it is not current, fetch them now. */
1857 fetch_buffer_markers (b
);
1859 /* Look down buffer's list of local Lisp variables
1860 to find and update any that forward into C variables. */
1864 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1866 Lisp_Object var
= XCAR (XCAR (tail
));
1867 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1868 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1869 && SYMBOL_BLV (sym
)->fwd
)
1870 /* Just reference the variable
1871 to cause it to become set for this buffer. */
1872 Fsymbol_value (var
);
1875 /* Do the same with any others that were local to the previous buffer */
1876 while (b
!= old_buf
&& (b
= old_buf
, b
));
1879 /* Switch to buffer B temporarily for redisplay purposes.
1880 This avoids certain things that don't need to be done within redisplay. */
1883 set_buffer_temp (struct buffer
*b
)
1885 register struct buffer
*old_buf
;
1887 if (current_buffer
== b
)
1890 old_buf
= current_buffer
;
1893 /* If the old current buffer has markers to record PT, BEGV and ZV
1894 when it is not current, update them now. */
1895 record_buffer_markers (old_buf
);
1897 /* If the new current buffer has markers to record PT, BEGV and ZV
1898 when it is not current, fetch them now. */
1899 fetch_buffer_markers (b
);
1902 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1903 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1904 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1905 also `save-excursion' when you want to make a buffer current
1906 temporarily. This function does not display the buffer, so its effect
1907 ends when the current command terminates. Use `switch-to-buffer' or
1908 `pop-to-buffer' to switch buffers permanently. */)
1909 (register Lisp_Object buffer_or_name
)
1911 register Lisp_Object buffer
;
1912 buffer
= Fget_buffer (buffer_or_name
);
1914 nsberror (buffer_or_name
);
1915 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1916 error ("Selecting deleted buffer");
1917 set_buffer_internal (XBUFFER (buffer
));
1921 /* Set the current buffer to BUFFER provided it is alive. */
1924 set_buffer_if_live (Lisp_Object buffer
)
1926 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1927 Fset_buffer (buffer
);
1931 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1932 Sbarf_if_buffer_read_only
, 0, 0, 0,
1933 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1936 if (!NILP (BVAR (current_buffer
, read_only
))
1937 && NILP (Vinhibit_read_only
))
1938 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1942 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1943 doc
: /* Delete the entire contents of the current buffer.
1944 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1945 so the buffer is truly empty after this. */)
1952 current_buffer
->last_window_start
= 1;
1953 /* Prevent warnings, or suspension of auto saving, that would happen
1954 if future size is less than past size. Use of erase-buffer
1955 implies that the future text is not really related to the past text. */
1956 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1961 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1963 CHECK_NUMBER_COERCE_MARKER (*b
);
1964 CHECK_NUMBER_COERCE_MARKER (*e
);
1966 if (XINT (*b
) > XINT (*e
))
1969 tem
= *b
; *b
= *e
; *e
= tem
;
1972 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1973 && XINT (*e
) <= ZV
))
1974 args_out_of_range (*b
, *e
);
1977 /* Advance BYTE_POS up to a character boundary
1978 and return the adjusted position. */
1981 advance_to_char_boundary (EMACS_INT byte_pos
)
1985 if (byte_pos
== BEG
)
1986 /* Beginning of buffer is always a character boundary. */
1989 c
= FETCH_BYTE (byte_pos
);
1990 if (! CHAR_HEAD_P (c
))
1992 /* We should advance BYTE_POS only when C is a constituent of a
1993 multibyte sequence. */
1994 EMACS_INT orig_byte_pos
= byte_pos
;
1999 c
= FETCH_BYTE (byte_pos
);
2001 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2003 if (byte_pos
< orig_byte_pos
)
2004 byte_pos
= orig_byte_pos
;
2005 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2006 surely advance to the correct character boundary. If C is
2007 not, BYTE_POS was unchanged. */
2014 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2015 #endif /* REL_ALLOC */
2017 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2019 doc
: /* Swap the text between current buffer and BUFFER. */)
2020 (Lisp_Object buffer
)
2022 struct buffer
*other_buffer
;
2023 CHECK_BUFFER (buffer
);
2024 other_buffer
= XBUFFER (buffer
);
2026 if (NILP (BVAR (other_buffer
, name
)))
2027 error ("Cannot swap a dead buffer's text");
2029 /* Actually, it probably works just fine.
2030 * if (other_buffer == current_buffer)
2031 * error ("Cannot swap a buffer's text with itself"); */
2033 /* Actually, this may be workable as well, tho probably only if they're
2035 if (other_buffer
->base_buffer
2036 || current_buffer
->base_buffer
)
2037 error ("Cannot swap indirect buffers's text");
2039 { /* This is probably harder to make work. */
2040 struct buffer
*other
;
2041 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2042 if (other
->base_buffer
== other_buffer
2043 || other
->base_buffer
== current_buffer
)
2044 error ("One of the buffers to swap has indirect buffers");
2047 #define swapfield(field, type) \
2049 type tmp##field = other_buffer->field; \
2050 other_buffer->field = current_buffer->field; \
2051 current_buffer->field = tmp##field; \
2053 #define swapfield_(field, type) \
2055 type tmp##field = BVAR (other_buffer, field); \
2056 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2057 BVAR (current_buffer, field) = tmp##field; \
2060 swapfield (own_text
, struct buffer_text
);
2061 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2062 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2064 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2065 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2066 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2067 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2068 #endif /* REL_ALLOC */
2070 swapfield (pt
, EMACS_INT
);
2071 swapfield (pt_byte
, EMACS_INT
);
2072 swapfield (begv
, EMACS_INT
);
2073 swapfield (begv_byte
, EMACS_INT
);
2074 swapfield (zv
, EMACS_INT
);
2075 swapfield (zv_byte
, EMACS_INT
);
2076 eassert (!current_buffer
->base_buffer
);
2077 eassert (!other_buffer
->base_buffer
);
2078 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2079 swapfield (newline_cache
, struct region_cache
*);
2080 swapfield (width_run_cache
, struct region_cache
*);
2081 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2082 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2083 swapfield (overlays_before
, struct Lisp_Overlay
*);
2084 swapfield (overlays_after
, struct Lisp_Overlay
*);
2085 swapfield (overlay_center
, EMACS_INT
);
2086 swapfield_ (undo_list
, Lisp_Object
);
2087 swapfield_ (mark
, Lisp_Object
);
2088 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2089 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2090 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2091 /* FIXME: Not sure what we should do with these *_marker fields.
2092 Hopefully they're just nil anyway. */
2093 swapfield_ (pt_marker
, Lisp_Object
);
2094 swapfield_ (begv_marker
, Lisp_Object
);
2095 swapfield_ (zv_marker
, Lisp_Object
);
2096 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2097 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2099 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2100 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2101 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2102 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2103 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2104 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2105 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2107 struct Lisp_Marker
*m
;
2108 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2109 if (m
->buffer
== other_buffer
)
2110 m
->buffer
= current_buffer
;
2112 /* Since there's no indirect buffer in sight, markers on
2113 BUF_MARKERS(buf) should either be for `buf' or dead. */
2114 eassert (!m
->buffer
);
2115 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2116 if (m
->buffer
== current_buffer
)
2117 m
->buffer
= other_buffer
;
2119 /* Since there's no indirect buffer in sight, markers on
2120 BUF_MARKERS(buf) should either be for `buf' or dead. */
2121 eassert (!m
->buffer
);
2123 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2124 So since we just swapped the markers between the two buffers, we need
2125 to undo the effect of this swap for window markers. */
2126 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2127 Lisp_Object buf1
, buf2
;
2128 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2130 while (NILP (Fmemq (w
, ws
)))
2133 if (MARKERP (XWINDOW (w
)->pointm
)
2134 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2135 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2136 Fset_marker (XWINDOW (w
)->pointm
,
2137 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2138 XWINDOW (w
)->buffer
);
2139 w
= Fnext_window (w
, Qt
, Qt
);
2143 if (current_buffer
->text
->intervals
)
2144 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2145 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2146 if (other_buffer
->text
->intervals
)
2147 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2148 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2153 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2155 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2156 If FLAG is t, this makes the buffer a multibyte buffer.
2157 If FLAG is nil, this makes the buffer a single-byte buffer.
2158 In these cases, the buffer contents remain unchanged as a sequence of
2159 bytes but the contents viewed as characters do change.
2160 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2161 all eight-bit bytes to eight-bit characters.
2162 If the multibyte flag was really changed, undo information of the
2163 current buffer is cleared. */)
2166 struct Lisp_Marker
*tail
, *markers
;
2167 struct buffer
*other
;
2169 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2170 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2171 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2172 struct gcpro gcpro1
;
2174 if (current_buffer
->base_buffer
)
2175 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2177 /* Do nothing if nothing actually changes. */
2178 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2183 /* Don't record these buffer changes. We will put a special undo entry
2185 BVAR (current_buffer
, undo_list
) = Qt
;
2187 /* If the cached position is for this buffer, clear it out. */
2188 clear_charpos_cache (current_buffer
);
2191 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2193 begv
= BEGV
, zv
= ZV
;
2200 EMACS_INT pos
, stop
;
2203 /* Do this first, so it can use CHAR_TO_BYTE
2204 to calculate the old correspondences. */
2205 set_intervals_multibyte (0);
2207 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2213 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2216 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2217 tail
->charpos
= tail
->bytepos
;
2219 /* Convert multibyte form of 8-bit characters to unibyte. */
2234 if (ASCII_BYTE_P (*p
))
2236 else if (CHAR_BYTE8_HEAD_P (*p
))
2238 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2239 /* Delete all bytes for this 8-bit character but the
2240 last one, and change the last one to the character
2243 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2255 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2256 p
+= bytes
, pos
+= bytes
;
2260 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2265 EMACS_INT pos
, stop
;
2266 unsigned char *p
, *pend
;
2268 /* Be sure not to have a multibyte sequence striding over the GAP.
2269 Ex: We change this: "...abc\302 _GAP_ \241def..."
2270 to: "...abc _GAP_ \302\241def..." */
2273 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2274 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2276 unsigned char *q
= GPT_ADDR
- 1;
2278 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2279 if (LEADING_CODE_P (*q
))
2281 EMACS_INT new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2283 move_gap_both (new_gpt
, new_gpt
);
2287 /* Make the buffer contents valid as multibyte by converting
2288 8-bit characters to multibyte form. */
2306 if (ASCII_BYTE_P (*p
))
2308 else if (EQ (flag
, Qt
)
2309 && ! CHAR_BYTE8_HEAD_P (*p
)
2310 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2311 p
+= bytes
, pos
+= bytes
;
2314 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2317 c
= BYTE8_TO_CHAR (*p
);
2318 bytes
= CHAR_STRING (c
, tmp
);
2320 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2322 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2323 /* Now the gap is after the just inserted data. */
2341 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2343 /* Do this first, so that chars_in_text asks the right question.
2344 set_intervals_multibyte needs it too. */
2345 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2347 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2348 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2350 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2352 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2353 if (BEGV_BYTE
> GPT_BYTE
)
2354 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2356 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2358 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2359 if (ZV_BYTE
> GPT_BYTE
)
2360 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2362 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2365 EMACS_INT byte
= advance_to_char_boundary (PT_BYTE
);
2368 if (byte
> GPT_BYTE
)
2369 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2371 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2372 TEMP_SET_PT_BOTH (position
, byte
);
2375 tail
= markers
= BUF_MARKERS (current_buffer
);
2377 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2378 getting confused by the markers that have not yet been updated.
2379 It is also a signal that it should never create a marker. */
2380 BUF_MARKERS (current_buffer
) = NULL
;
2382 for (; tail
; tail
= tail
->next
)
2384 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2385 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2388 /* Make sure no markers were put on the chain
2389 while the chain value was incorrect. */
2390 if (BUF_MARKERS (current_buffer
))
2393 BUF_MARKERS (current_buffer
) = markers
;
2395 /* Do this last, so it can calculate the new correspondences
2396 between chars and bytes. */
2397 set_intervals_multibyte (1);
2400 if (!EQ (old_undo
, Qt
))
2402 /* Represent all the above changes by a special undo entry. */
2403 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2404 intern ("set-buffer-multibyte"),
2405 NILP (flag
) ? Qt
: Qnil
),
2411 /* Changing the multibyteness of a buffer means that all windows
2412 showing that buffer must be updated thoroughly. */
2413 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2414 ++windows_or_buffers_changed
;
2416 /* Copy this buffer's new multibyte status
2417 into all of its indirect buffers. */
2418 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2419 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2421 BVAR (other
, enable_multibyte_characters
)
2422 = BVAR (current_buffer
, enable_multibyte_characters
);
2423 other
->prevent_redisplay_optimizations_p
= 1;
2426 /* Restore the modifiedness of the buffer. */
2427 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2428 Fset_buffer_modified_p (Qnil
);
2430 /* Update coding systems of this buffer's process (if any). */
2432 Lisp_Object process
;
2434 process
= Fget_buffer_process (Fcurrent_buffer ());
2435 if (PROCESSP (process
))
2436 setup_process_coding_systems (process
);
2442 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2443 Skill_all_local_variables
, 0, 0, 0,
2444 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2445 Most local variable bindings are eliminated so that the default values
2446 become effective once more. Also, the syntax table is set from
2447 `standard-syntax-table', the local keymap is set to nil,
2448 and the abbrev table from `fundamental-mode-abbrev-table'.
2449 This function also forces redisplay of the mode line.
2451 Every function to select a new major mode starts by
2452 calling this function.
2454 As a special exception, local variables whose names have
2455 a non-nil `permanent-local' property are not eliminated by this function.
2457 The first thing this function does is run
2458 the normal hook `change-major-mode-hook'. */)
2461 Frun_hooks (1, &Qchange_major_mode_hook
);
2463 /* Make sure none of the bindings in local_var_alist
2464 remain swapped in, in their symbols. */
2466 swap_out_buffer_local_variables (current_buffer
);
2468 /* Actually eliminate all local bindings of this buffer. */
2470 reset_buffer_local_variables (current_buffer
, 0);
2472 /* Force mode-line redisplay. Useful here because all major mode
2473 commands call this function. */
2474 update_mode_lines
++;
2479 /* Make sure no local variables remain set up with buffer B
2480 for their current values. */
2483 swap_out_buffer_local_variables (struct buffer
*b
)
2485 Lisp_Object oalist
, alist
, buffer
;
2487 XSETBUFFER (buffer
, b
);
2488 oalist
= BVAR (b
, local_var_alist
);
2490 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2492 Lisp_Object sym
= XCAR (XCAR (alist
));
2493 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2494 /* Need not do anything if some other buffer's binding is
2496 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2498 /* Symbol is set up for this buffer's old local value:
2500 swap_in_global_binding (XSYMBOL (sym
));
2505 /* Find all the overlays in the current buffer that contain position POS.
2506 Return the number found, and store them in a vector in *VEC_PTR.
2507 Store in *LEN_PTR the size allocated for the vector.
2508 Store in *NEXT_PTR the next position after POS where an overlay starts,
2509 or ZV if there are no more overlays between POS and ZV.
2510 Store in *PREV_PTR the previous position before POS where an overlay ends,
2511 or where an overlay starts which ends at or after POS;
2512 or BEGV if there are no such overlays from BEGV to POS.
2513 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2515 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2516 when this function is called.
2518 If EXTEND is non-zero, we make the vector bigger if necessary.
2519 If EXTEND is zero, we never extend the vector,
2520 and we store only as many overlays as will fit.
2521 But we still return the total number of overlays.
2523 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2524 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2525 default (BEGV or ZV). */
2528 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2530 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
, int change_req
)
2532 Lisp_Object overlay
, start
, end
;
2533 struct Lisp_Overlay
*tail
;
2535 ptrdiff_t len
= *len_ptr
;
2536 Lisp_Object
*vec
= *vec_ptr
;
2537 EMACS_INT next
= ZV
;
2538 EMACS_INT prev
= BEGV
;
2539 int inhibit_storing
= 0;
2541 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2543 EMACS_INT startpos
, endpos
;
2545 XSETMISC (overlay
, tail
);
2547 start
= OVERLAY_START (overlay
);
2548 end
= OVERLAY_END (overlay
);
2549 endpos
= OVERLAY_POSITION (end
);
2556 startpos
= OVERLAY_POSITION (start
);
2557 /* This one ends at or after POS
2558 so its start counts for PREV_PTR if it's before POS. */
2559 if (prev
< startpos
&& startpos
< pos
)
2563 if (startpos
<= pos
)
2567 /* The supplied vector is full.
2568 Either make it bigger, or don't store any more in it. */
2571 if ((OVERLAY_COUNT_MAX
- 4) / 2 < len
)
2572 memory_full (SIZE_MAX
);
2573 /* Make it work with an initial len == 0. */
2575 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2580 inhibit_storing
= 1;
2583 if (!inhibit_storing
)
2585 /* Keep counting overlays even if we can't return them all. */
2588 else if (startpos
< next
)
2592 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2594 EMACS_INT startpos
, endpos
;
2596 XSETMISC (overlay
, tail
);
2598 start
= OVERLAY_START (overlay
);
2599 end
= OVERLAY_END (overlay
);
2600 startpos
= OVERLAY_POSITION (start
);
2603 if (startpos
< next
)
2607 endpos
= OVERLAY_POSITION (end
);
2614 if ((OVERLAY_COUNT_MAX
- 4) / 2 < len
)
2615 memory_full (SIZE_MAX
);
2616 /* Make it work with an initial len == 0. */
2618 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2623 inhibit_storing
= 1;
2626 if (!inhibit_storing
)
2630 if (startpos
< pos
&& startpos
> prev
)
2633 else if (endpos
< pos
&& endpos
> prev
)
2635 else if (endpos
== pos
&& startpos
> prev
2636 && (!change_req
|| startpos
< pos
))
2647 /* Find all the overlays in the current buffer that overlap the range
2648 BEG-END, or are empty at BEG, or are empty at END provided END
2649 denotes the position at the end of the current buffer.
2651 Return the number found, and store them in a vector in *VEC_PTR.
2652 Store in *LEN_PTR the size allocated for the vector.
2653 Store in *NEXT_PTR the next position after POS where an overlay starts,
2654 or ZV if there are no more overlays.
2655 Store in *PREV_PTR the previous position before POS where an overlay ends,
2656 or BEGV if there are no previous overlays.
2657 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2659 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2660 when this function is called.
2662 If EXTEND is non-zero, we make the vector bigger if necessary.
2663 If EXTEND is zero, we never extend the vector,
2664 and we store only as many overlays as will fit.
2665 But we still return the total number of overlays. */
2668 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2669 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2670 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
)
2672 Lisp_Object overlay
, ostart
, oend
;
2673 struct Lisp_Overlay
*tail
;
2675 ptrdiff_t len
= *len_ptr
;
2676 Lisp_Object
*vec
= *vec_ptr
;
2677 EMACS_INT next
= ZV
;
2678 EMACS_INT prev
= BEGV
;
2679 int inhibit_storing
= 0;
2680 int end_is_Z
= end
== Z
;
2682 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2684 EMACS_INT startpos
, endpos
;
2686 XSETMISC (overlay
, tail
);
2688 ostart
= OVERLAY_START (overlay
);
2689 oend
= OVERLAY_END (overlay
);
2690 endpos
= OVERLAY_POSITION (oend
);
2697 startpos
= OVERLAY_POSITION (ostart
);
2698 /* Count an interval if it overlaps the range, is empty at the
2699 start of the range, or is empty at END provided END denotes the
2700 end of the buffer. */
2701 if ((beg
< endpos
&& startpos
< end
)
2702 || (startpos
== endpos
2703 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2707 /* The supplied vector is full.
2708 Either make it bigger, or don't store any more in it. */
2711 if ((OVERLAY_COUNT_MAX
- 4) / 2 < len
)
2712 memory_full (SIZE_MAX
);
2713 /* Make it work with an initial len == 0. */
2715 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2720 inhibit_storing
= 1;
2723 if (!inhibit_storing
)
2725 /* Keep counting overlays even if we can't return them all. */
2728 else if (startpos
< next
)
2732 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2734 EMACS_INT startpos
, endpos
;
2736 XSETMISC (overlay
, tail
);
2738 ostart
= OVERLAY_START (overlay
);
2739 oend
= OVERLAY_END (overlay
);
2740 startpos
= OVERLAY_POSITION (ostart
);
2743 if (startpos
< next
)
2747 endpos
= OVERLAY_POSITION (oend
);
2748 /* Count an interval if it overlaps the range, is empty at the
2749 start of the range, or is empty at END provided END denotes the
2750 end of the buffer. */
2751 if ((beg
< endpos
&& startpos
< end
)
2752 || (startpos
== endpos
2753 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2759 if ((OVERLAY_COUNT_MAX
- 4) / 2 < len
)
2760 memory_full (SIZE_MAX
);
2761 /* Make it work with an initial len == 0. */
2763 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2768 inhibit_storing
= 1;
2771 if (!inhibit_storing
)
2775 else if (endpos
< beg
&& endpos
> prev
)
2787 /* Return non-zero if there exists an overlay with a non-nil
2788 `mouse-face' property overlapping OVERLAY. */
2791 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2793 EMACS_INT start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2794 EMACS_INT end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2795 ptrdiff_t n
, i
, size
;
2796 Lisp_Object
*v
, tem
;
2799 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2800 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2803 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2804 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2807 for (i
= 0; i
< n
; ++i
)
2808 if (!EQ (v
[i
], overlay
)
2809 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2818 /* Fast function to just test if we're at an overlay boundary. */
2820 overlay_touches_p (EMACS_INT pos
)
2822 Lisp_Object overlay
;
2823 struct Lisp_Overlay
*tail
;
2825 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2829 XSETMISC (overlay
,tail
);
2830 if (!OVERLAYP (overlay
))
2833 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2836 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2840 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2844 XSETMISC (overlay
, tail
);
2845 if (!OVERLAYP (overlay
))
2848 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2851 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2859 Lisp_Object overlay
;
2865 compare_overlays (const void *v1
, const void *v2
)
2867 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2868 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2869 if (s1
->priority
!= s2
->priority
)
2870 return s1
->priority
< s2
->priority
? -1 : 1;
2871 if (s1
->beg
!= s2
->beg
)
2872 return s1
->beg
< s2
->beg
? -1 : 1;
2873 if (s1
->end
!= s2
->end
)
2874 return s2
->end
< s1
->end
? -1 : 1;
2878 /* Sort an array of overlays by priority. The array is modified in place.
2879 The return value is the new size; this may be smaller than the original
2880 size if some of the overlays were invalid or were window-specific. */
2882 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2885 struct sortvec
*sortvec
;
2886 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2888 /* Put the valid and relevant overlays into sortvec. */
2890 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2893 Lisp_Object overlay
;
2895 overlay
= overlay_vec
[i
];
2896 if (OVERLAY_VALID (overlay
)
2897 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2898 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2900 /* If we're interested in a specific window, then ignore
2901 overlays that are limited to some other window. */
2906 window
= Foverlay_get (overlay
, Qwindow
);
2907 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2911 /* This overlay is good and counts: put it into sortvec. */
2912 sortvec
[j
].overlay
= overlay
;
2913 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2914 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2915 tem
= Foverlay_get (overlay
, Qpriority
);
2917 sortvec
[j
].priority
= XINT (tem
);
2919 sortvec
[j
].priority
= 0;
2925 /* Sort the overlays into the proper order: increasing priority. */
2928 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2930 for (i
= 0; i
< noverlays
; i
++)
2931 overlay_vec
[i
] = sortvec
[i
].overlay
;
2937 Lisp_Object string
, string2
;
2944 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2945 ptrdiff_t size
; /* Allocated length of that array. */
2946 ptrdiff_t used
; /* How much of the array is currently in use. */
2947 EMACS_INT bytes
; /* Total length of the strings in buf. */
2950 /* Buffers for storing information about the overlays touching a given
2951 position. These could be automatic variables in overlay_strings, but
2952 it's more efficient to hold onto the memory instead of repeatedly
2953 allocating and freeing it. */
2954 static struct sortstrlist overlay_heads
, overlay_tails
;
2955 static unsigned char *overlay_str_buf
;
2957 /* Allocated length of overlay_str_buf. */
2958 static EMACS_INT overlay_str_len
;
2960 /* A comparison function suitable for passing to qsort. */
2962 cmp_for_strings (const void *as1
, const void *as2
)
2964 struct sortstr
*s1
= (struct sortstr
*)as1
;
2965 struct sortstr
*s2
= (struct sortstr
*)as2
;
2966 if (s1
->size
!= s2
->size
)
2967 return s2
->size
< s1
->size
? -1 : 1;
2968 if (s1
->priority
!= s2
->priority
)
2969 return s1
->priority
< s2
->priority
? -1 : 1;
2974 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2975 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2979 if (ssl
->used
== ssl
->size
)
2981 ptrdiff_t ssl_size
= 0 < ssl
->size
? ssl
->size
* 2 : 5;
2982 if (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof (struct sortstr
) < ssl_size
)
2983 memory_full (SIZE_MAX
);
2984 ssl
->buf
= ((struct sortstr
*)
2985 xrealloc (ssl
->buf
, ssl_size
* sizeof (struct sortstr
)));
2986 ssl
->size
= ssl_size
;
2988 ssl
->buf
[ssl
->used
].string
= str
;
2989 ssl
->buf
[ssl
->used
].string2
= str2
;
2990 ssl
->buf
[ssl
->used
].size
= size
;
2991 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2994 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2995 nbytes
= SCHARS (str
);
2996 else if (! STRING_MULTIBYTE (str
))
2997 nbytes
= count_size_as_multibyte (SDATA (str
),
3000 nbytes
= SBYTES (str
);
3002 ssl
->bytes
+= nbytes
;
3006 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3007 nbytes
= SCHARS (str2
);
3008 else if (! STRING_MULTIBYTE (str2
))
3009 nbytes
= count_size_as_multibyte (SDATA (str2
),
3012 nbytes
= SBYTES (str2
);
3014 ssl
->bytes
+= nbytes
;
3018 /* Return the concatenation of the strings associated with overlays that
3019 begin or end at POS, ignoring overlays that are specific to a window
3020 other than W. The strings are concatenated in the appropriate order:
3021 shorter overlays nest inside longer ones, and higher priority inside
3022 lower. Normally all of the after-strings come first, but zero-sized
3023 overlays have their after-strings ride along with the before-strings
3024 because it would look strange to print them inside-out.
3026 Returns the string length, and stores the contents indirectly through
3027 PSTR, if that variable is non-null. The string may be overwritten by
3028 subsequent calls. */
3031 overlay_strings (EMACS_INT pos
, struct window
*w
, unsigned char **pstr
)
3033 Lisp_Object overlay
, window
, str
;
3034 struct Lisp_Overlay
*ov
;
3035 EMACS_INT startpos
, endpos
;
3036 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3038 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3039 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3040 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3042 XSETMISC (overlay
, ov
);
3043 eassert (OVERLAYP (overlay
));
3045 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3046 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3049 if (endpos
!= pos
&& startpos
!= pos
)
3051 window
= Foverlay_get (overlay
, Qwindow
);
3052 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3055 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3056 record_overlay_string (&overlay_heads
, str
,
3058 ? Foverlay_get (overlay
, Qafter_string
)
3060 Foverlay_get (overlay
, Qpriority
),
3062 else if (endpos
== pos
3063 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3064 record_overlay_string (&overlay_tails
, str
, Qnil
,
3065 Foverlay_get (overlay
, Qpriority
),
3068 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3070 XSETMISC (overlay
, ov
);
3071 eassert (OVERLAYP (overlay
));
3073 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3074 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3077 if (endpos
!= pos
&& startpos
!= pos
)
3079 window
= Foverlay_get (overlay
, Qwindow
);
3080 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3083 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3084 record_overlay_string (&overlay_heads
, str
,
3086 ? Foverlay_get (overlay
, Qafter_string
)
3088 Foverlay_get (overlay
, Qpriority
),
3090 else if (endpos
== pos
3091 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3092 record_overlay_string (&overlay_tails
, str
, Qnil
,
3093 Foverlay_get (overlay
, Qpriority
),
3096 if (overlay_tails
.used
> 1)
3097 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3099 if (overlay_heads
.used
> 1)
3100 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3102 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3107 EMACS_INT total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3109 if (total
> overlay_str_len
)
3111 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3113 overlay_str_len
= total
;
3115 p
= overlay_str_buf
;
3116 for (i
= overlay_tails
.used
; --i
>= 0;)
3119 tem
= overlay_tails
.buf
[i
].string
;
3120 nbytes
= copy_text (SDATA (tem
), p
,
3122 STRING_MULTIBYTE (tem
), multibyte
);
3125 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3128 tem
= overlay_heads
.buf
[i
].string
;
3129 nbytes
= copy_text (SDATA (tem
), p
,
3131 STRING_MULTIBYTE (tem
), multibyte
);
3133 tem
= overlay_heads
.buf
[i
].string2
;
3136 nbytes
= copy_text (SDATA (tem
), p
,
3138 STRING_MULTIBYTE (tem
), multibyte
);
3142 if (p
!= overlay_str_buf
+ total
)
3145 *pstr
= overlay_str_buf
;
3151 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3154 recenter_overlay_lists (struct buffer
*buf
, EMACS_INT pos
)
3156 Lisp_Object overlay
, beg
, end
;
3157 struct Lisp_Overlay
*prev
, *tail
, *next
;
3159 /* See if anything in overlays_before should move to overlays_after. */
3161 /* We don't strictly need prev in this loop; it should always be nil.
3162 But we use it for symmetry and in case that should cease to be true
3163 with some future change. */
3165 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3168 XSETMISC (overlay
, tail
);
3170 /* If the overlay is not valid, get rid of it. */
3171 if (!OVERLAY_VALID (overlay
))
3176 /* Splice the cons cell TAIL out of overlays_before. */
3180 buf
->overlays_before
= next
;
3186 beg
= OVERLAY_START (overlay
);
3187 end
= OVERLAY_END (overlay
);
3189 if (OVERLAY_POSITION (end
) > pos
)
3191 /* OVERLAY needs to be moved. */
3192 EMACS_INT where
= OVERLAY_POSITION (beg
);
3193 struct Lisp_Overlay
*other
, *other_prev
;
3195 /* Splice the cons cell TAIL out of overlays_before. */
3199 buf
->overlays_before
= next
;
3201 /* Search thru overlays_after for where to put it. */
3203 for (other
= buf
->overlays_after
; other
;
3204 other_prev
= other
, other
= other
->next
)
3206 Lisp_Object otherbeg
, otheroverlay
;
3208 XSETMISC (otheroverlay
, other
);
3209 eassert (OVERLAY_VALID (otheroverlay
));
3211 otherbeg
= OVERLAY_START (otheroverlay
);
3212 if (OVERLAY_POSITION (otherbeg
) >= where
)
3216 /* Add TAIL to overlays_after before OTHER. */
3219 other_prev
->next
= tail
;
3221 buf
->overlays_after
= tail
;
3225 /* We've reached the things that should stay in overlays_before.
3226 All the rest of overlays_before must end even earlier,
3231 /* See if anything in overlays_after should be in overlays_before. */
3233 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3236 XSETMISC (overlay
, tail
);
3238 /* If the overlay is not valid, get rid of it. */
3239 if (!OVERLAY_VALID (overlay
))
3244 /* Splice the cons cell TAIL out of overlays_after. */
3248 buf
->overlays_after
= next
;
3254 beg
= OVERLAY_START (overlay
);
3255 end
= OVERLAY_END (overlay
);
3257 /* Stop looking, when we know that nothing further
3258 can possibly end before POS. */
3259 if (OVERLAY_POSITION (beg
) > pos
)
3262 if (OVERLAY_POSITION (end
) <= pos
)
3264 /* OVERLAY needs to be moved. */
3265 EMACS_INT where
= OVERLAY_POSITION (end
);
3266 struct Lisp_Overlay
*other
, *other_prev
;
3268 /* Splice the cons cell TAIL out of overlays_after. */
3272 buf
->overlays_after
= next
;
3274 /* Search thru overlays_before for where to put it. */
3276 for (other
= buf
->overlays_before
; other
;
3277 other_prev
= other
, other
= other
->next
)
3279 Lisp_Object otherend
, otheroverlay
;
3281 XSETMISC (otheroverlay
, other
);
3282 eassert (OVERLAY_VALID (otheroverlay
));
3284 otherend
= OVERLAY_END (otheroverlay
);
3285 if (OVERLAY_POSITION (otherend
) <= where
)
3289 /* Add TAIL to overlays_before before OTHER. */
3292 other_prev
->next
= tail
;
3294 buf
->overlays_before
= tail
;
3299 buf
->overlay_center
= pos
;
3303 adjust_overlays_for_insert (EMACS_INT pos
, EMACS_INT length
)
3305 /* After an insertion, the lists are still sorted properly,
3306 but we may need to update the value of the overlay center. */
3307 if (current_buffer
->overlay_center
>= pos
)
3308 current_buffer
->overlay_center
+= length
;
3312 adjust_overlays_for_delete (EMACS_INT pos
, EMACS_INT length
)
3314 if (current_buffer
->overlay_center
< pos
)
3315 /* The deletion was to our right. No change needed; the before- and
3316 after-lists are still consistent. */
3318 else if (current_buffer
->overlay_center
> pos
+ length
)
3319 /* The deletion was to our left. We need to adjust the center value
3320 to account for the change in position, but the lists are consistent
3321 given the new value. */
3322 current_buffer
->overlay_center
-= length
;
3324 /* We're right in the middle. There might be things on the after-list
3325 that now belong on the before-list. Recentering will move them,
3326 and also update the center point. */
3327 recenter_overlay_lists (current_buffer
, pos
);
3330 /* Fix up overlays that were garbled as a result of permuting markers
3331 in the range START through END. Any overlay with at least one
3332 endpoint in this range will need to be unlinked from the overlay
3333 list and reinserted in its proper place.
3334 Such an overlay might even have negative size at this point.
3335 If so, we'll make the overlay empty. */
3337 fix_start_end_in_overlays (register EMACS_INT start
, register EMACS_INT end
)
3339 Lisp_Object overlay
;
3340 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3341 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3342 /* These are either nil, indicating that before_list or after_list
3343 should be assigned, or the cons cell the cdr of which should be
3345 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3346 /* 'Parent', likewise, indicates a cons cell or
3347 current_buffer->overlays_before or overlays_after, depending
3348 which loop we're in. */
3349 struct Lisp_Overlay
*tail
, *parent
;
3350 EMACS_INT startpos
, endpos
;
3352 /* This algorithm shifts links around instead of consing and GCing.
3353 The loop invariant is that before_list (resp. after_list) is a
3354 well-formed list except that its last element, the CDR of beforep
3355 (resp. afterp) if beforep (afterp) isn't nil or before_list
3356 (after_list) if it is, is still uninitialized. So it's not a bug
3357 that before_list isn't initialized, although it may look
3359 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3361 XSETMISC (overlay
, tail
);
3363 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3364 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3366 /* If the overlay is backwards, make it empty. */
3367 if (endpos
< startpos
)
3370 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3378 || (startpos
>= start
&& startpos
< end
))
3380 /* Add it to the end of the wrong list. Later on,
3381 recenter_overlay_lists will move it to the right place. */
3382 if (endpos
< current_buffer
->overlay_center
)
3387 afterp
->next
= tail
;
3395 beforep
->next
= tail
;
3399 current_buffer
->overlays_before
= tail
->next
;
3401 parent
->next
= tail
->next
;
3405 parent
= tail
, tail
= parent
->next
;
3407 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3409 XSETMISC (overlay
, tail
);
3411 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3412 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3414 /* If the overlay is backwards, make it empty. */
3415 if (endpos
< startpos
)
3418 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3422 if (startpos
>= end
)
3425 if (startpos
>= start
3426 || (endpos
>= start
&& endpos
< end
))
3428 if (endpos
< current_buffer
->overlay_center
)
3433 afterp
->next
= tail
;
3441 beforep
->next
= tail
;
3445 current_buffer
->overlays_after
= tail
->next
;
3447 parent
->next
= tail
->next
;
3451 parent
= tail
, tail
= parent
->next
;
3454 /* Splice the constructed (wrong) lists into the buffer's lists,
3455 and let the recenter function make it sane again. */
3458 beforep
->next
= current_buffer
->overlays_before
;
3459 current_buffer
->overlays_before
= before_list
;
3461 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3465 afterp
->next
= current_buffer
->overlays_after
;
3466 current_buffer
->overlays_after
= after_list
;
3468 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3471 /* We have two types of overlay: the one whose ending marker is
3472 after-insertion-marker (this is the usual case) and the one whose
3473 ending marker is before-insertion-marker. When `overlays_before'
3474 contains overlays of the latter type and the former type in this
3475 order and both overlays end at inserting position, inserting a text
3476 increases only the ending marker of the latter type, which results
3477 in incorrect ordering of `overlays_before'.
3479 This function fixes ordering of overlays in the slot
3480 `overlays_before' of the buffer *BP. Before the insertion, `point'
3481 was at PREV, and now is at POS. */
3484 fix_overlays_before (struct buffer
*bp
, EMACS_INT prev
, EMACS_INT pos
)
3486 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3487 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3489 EMACS_INT end
IF_LINT (= 0);
3491 /* After the insertion, the several overlays may be in incorrect
3492 order. The possibility is that, in the list `overlays_before',
3493 an overlay which ends at POS appears after an overlay which ends
3494 at PREV. Since POS is greater than PREV, we must fix the
3495 ordering of these overlays, by moving overlays ends at POS before
3496 the overlays ends at PREV. */
3498 /* At first, find a place where disordered overlays should be linked
3499 in. It is where an overlay which end before POS exists. (i.e. an
3500 overlay whose ending marker is after-insertion-marker if disorder
3503 && (XSETMISC (tem
, tail
),
3504 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3510 /* If we don't find such an overlay,
3511 or the found one ends before PREV,
3512 or the found one is the last one in the list,
3513 we don't have to fix anything. */
3514 if (!tail
|| end
< prev
|| !tail
->next
)
3517 right_pair
= parent
;
3521 /* Now, end position of overlays in the list TAIL should be before
3522 or equal to PREV. In the loop, an overlay which ends at POS is
3523 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3524 we found an overlay which ends before PREV, the remaining
3525 overlays are in correct order. */
3528 XSETMISC (tem
, tail
);
3529 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3532 { /* This overlay is disordered. */
3533 struct Lisp_Overlay
*found
= tail
;
3535 /* Unlink the found overlay. */
3537 parent
->next
= tail
;
3538 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3539 and link it into the right place. */
3542 found
->next
= bp
->overlays_before
;
3543 bp
->overlays_before
= found
;
3547 found
->next
= right_pair
->next
;
3548 right_pair
->next
= found
;
3551 else if (end
== prev
)
3556 else /* No more disordered overlay. */
3561 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3562 doc
: /* Return t if OBJECT is an overlay. */)
3563 (Lisp_Object object
)
3565 return (OVERLAYP (object
) ? Qt
: Qnil
);
3568 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3569 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3570 If omitted, BUFFER defaults to the current buffer.
3571 BEG and END may be integers or markers.
3572 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3573 for the front of the overlay advance when text is inserted there
3574 \(which means the text *is not* included in the overlay).
3575 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3576 for the rear of the overlay advance when text is inserted there
3577 \(which means the text *is* included in the overlay). */)
3578 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3580 Lisp_Object overlay
;
3584 XSETBUFFER (buffer
, current_buffer
);
3586 CHECK_BUFFER (buffer
);
3588 && ! EQ (Fmarker_buffer (beg
), buffer
))
3589 error ("Marker points into wrong buffer");
3591 && ! EQ (Fmarker_buffer (end
), buffer
))
3592 error ("Marker points into wrong buffer");
3594 CHECK_NUMBER_COERCE_MARKER (beg
);
3595 CHECK_NUMBER_COERCE_MARKER (end
);
3597 if (XINT (beg
) > XINT (end
))
3600 temp
= beg
; beg
= end
; end
= temp
;
3603 b
= XBUFFER (buffer
);
3605 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3606 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3608 if (!NILP (front_advance
))
3609 XMARKER (beg
)->insertion_type
= 1;
3610 if (!NILP (rear_advance
))
3611 XMARKER (end
)->insertion_type
= 1;
3613 overlay
= allocate_misc ();
3614 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3615 XOVERLAY (overlay
)->start
= beg
;
3616 XOVERLAY (overlay
)->end
= end
;
3617 XOVERLAY (overlay
)->plist
= Qnil
;
3618 XOVERLAY (overlay
)->next
= NULL
;
3620 /* Put the new overlay on the wrong list. */
3621 end
= OVERLAY_END (overlay
);
3622 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3624 if (b
->overlays_after
)
3625 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3626 b
->overlays_after
= XOVERLAY (overlay
);
3630 if (b
->overlays_before
)
3631 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3632 b
->overlays_before
= XOVERLAY (overlay
);
3635 /* This puts it in the right list, and in the right order. */
3636 recenter_overlay_lists (b
, b
->overlay_center
);
3638 /* We don't need to redisplay the region covered by the overlay, because
3639 the overlay has no properties at the moment. */
3644 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3647 modify_overlay (struct buffer
*buf
, EMACS_INT start
, EMACS_INT end
)
3651 EMACS_INT temp
= start
;
3656 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3658 /* If this is a buffer not in the selected window,
3659 we must do other windows. */
3660 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3661 windows_or_buffers_changed
= 1;
3662 /* If multiple windows show this buffer, we must do other windows. */
3663 else if (buffer_shared
> 1)
3664 windows_or_buffers_changed
= 1;
3665 /* If we modify an overlay at the end of the buffer, we cannot
3666 be sure that window end is still valid. */
3667 else if (end
>= ZV
&& start
<= ZV
)
3668 windows_or_buffers_changed
= 1;
3670 ++BUF_OVERLAY_MODIFF (buf
);
3674 static struct Lisp_Overlay
*
3675 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3677 struct Lisp_Overlay
*tmp
, *prev
;
3678 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3682 prev
->next
= tmp
->next
;
3685 overlay
->next
= NULL
;
3691 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3692 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3693 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3694 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3696 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3698 struct buffer
*b
, *ob
;
3699 Lisp_Object obuffer
;
3700 int count
= SPECPDL_INDEX ();
3702 CHECK_OVERLAY (overlay
);
3704 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3706 XSETBUFFER (buffer
, current_buffer
);
3707 CHECK_BUFFER (buffer
);
3710 && ! EQ (Fmarker_buffer (beg
), buffer
))
3711 error ("Marker points into wrong buffer");
3713 && ! EQ (Fmarker_buffer (end
), buffer
))
3714 error ("Marker points into wrong buffer");
3716 CHECK_NUMBER_COERCE_MARKER (beg
);
3717 CHECK_NUMBER_COERCE_MARKER (end
);
3719 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3720 return Fdelete_overlay (overlay
);
3722 if (XINT (beg
) > XINT (end
))
3725 temp
= beg
; beg
= end
; end
= temp
;
3728 specbind (Qinhibit_quit
, Qt
);
3730 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3731 b
= XBUFFER (buffer
);
3732 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3734 /* If the overlay has changed buffers, do a thorough redisplay. */
3735 if (!EQ (buffer
, obuffer
))
3737 /* Redisplay where the overlay was. */
3738 if (!NILP (obuffer
))
3743 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3744 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3746 modify_overlay (ob
, o_beg
, o_end
);
3749 /* Redisplay where the overlay is going to be. */
3750 modify_overlay (b
, XINT (beg
), XINT (end
));
3753 /* Redisplay the area the overlay has just left, or just enclosed. */
3755 EMACS_INT o_beg
, o_end
;
3757 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3758 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3760 if (o_beg
== XINT (beg
))
3761 modify_overlay (b
, o_end
, XINT (end
));
3762 else if (o_end
== XINT (end
))
3763 modify_overlay (b
, o_beg
, XINT (beg
));
3766 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3767 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3768 modify_overlay (b
, o_beg
, o_end
);
3772 if (!NILP (obuffer
))
3775 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3777 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3778 eassert (XOVERLAY (overlay
)->next
== NULL
);
3781 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3782 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3784 /* Put the overlay on the wrong list. */
3785 end
= OVERLAY_END (overlay
);
3786 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3788 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3789 b
->overlays_after
= XOVERLAY (overlay
);
3793 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3794 b
->overlays_before
= XOVERLAY (overlay
);
3797 /* This puts it in the right list, and in the right order. */
3798 recenter_overlay_lists (b
, b
->overlay_center
);
3800 return unbind_to (count
, overlay
);
3803 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3804 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3805 (Lisp_Object overlay
)
3809 int count
= SPECPDL_INDEX ();
3811 CHECK_OVERLAY (overlay
);
3813 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3817 b
= XBUFFER (buffer
);
3818 specbind (Qinhibit_quit
, Qt
);
3820 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3821 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3822 eassert (XOVERLAY (overlay
)->next
== NULL
);
3824 marker_position (OVERLAY_START (overlay
)),
3825 marker_position (OVERLAY_END (overlay
)));
3826 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3827 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3829 /* When deleting an overlay with before or after strings, turn off
3830 display optimizations for the affected buffer, on the basis that
3831 these strings may contain newlines. This is easier to do than to
3832 check for that situation during redisplay. */
3833 if (!windows_or_buffers_changed
3834 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3835 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3836 b
->prevent_redisplay_optimizations_p
= 1;
3838 return unbind_to (count
, Qnil
);
3841 /* Overlay dissection functions. */
3843 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3844 doc
: /* Return the position at which OVERLAY starts. */)
3845 (Lisp_Object overlay
)
3847 CHECK_OVERLAY (overlay
);
3849 return (Fmarker_position (OVERLAY_START (overlay
)));
3852 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3853 doc
: /* Return the position at which OVERLAY ends. */)
3854 (Lisp_Object overlay
)
3856 CHECK_OVERLAY (overlay
);
3858 return (Fmarker_position (OVERLAY_END (overlay
)));
3861 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3862 doc
: /* Return the buffer OVERLAY belongs to.
3863 Return nil if OVERLAY has been deleted. */)
3864 (Lisp_Object overlay
)
3866 CHECK_OVERLAY (overlay
);
3868 return Fmarker_buffer (OVERLAY_START (overlay
));
3871 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3872 doc
: /* Return a list of the properties on OVERLAY.
3873 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3875 (Lisp_Object overlay
)
3877 CHECK_OVERLAY (overlay
);
3879 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3883 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3884 doc
: /* Return a list of the overlays that contain the character at POS. */)
3887 ptrdiff_t len
, noverlays
;
3888 Lisp_Object
*overlay_vec
;
3891 CHECK_NUMBER_COERCE_MARKER (pos
);
3894 /* We can't use alloca here because overlays_at can call xrealloc. */
3895 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3897 /* Put all the overlays we want in a vector in overlay_vec.
3898 Store the length in len. */
3899 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3900 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
3902 /* Make a list of them all. */
3903 result
= Flist (noverlays
, overlay_vec
);
3905 xfree (overlay_vec
);
3909 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3910 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3911 Overlap means that at least one character is contained within the overlay
3912 and also contained within the specified region.
3913 Empty overlays are included in the result if they are located at BEG,
3914 between BEG and END, or at END provided END denotes the position at the
3915 end of the buffer. */)
3916 (Lisp_Object beg
, Lisp_Object end
)
3918 ptrdiff_t len
, noverlays
;
3919 Lisp_Object
*overlay_vec
;
3922 CHECK_NUMBER_COERCE_MARKER (beg
);
3923 CHECK_NUMBER_COERCE_MARKER (end
);
3926 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3928 /* Put all the overlays we want in a vector in overlay_vec.
3929 Store the length in len. */
3930 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3933 /* Make a list of them all. */
3934 result
= Flist (noverlays
, overlay_vec
);
3936 xfree (overlay_vec
);
3940 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3942 doc
: /* Return the next position after POS where an overlay starts or ends.
3943 If there are no overlay boundaries from POS to (point-max),
3944 the value is (point-max). */)
3947 ptrdiff_t i
, len
, noverlays
;
3949 Lisp_Object
*overlay_vec
;
3951 CHECK_NUMBER_COERCE_MARKER (pos
);
3954 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3956 /* Put all the overlays we want in a vector in overlay_vec.
3957 Store the length in len.
3958 endpos gets the position where the next overlay starts. */
3959 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3960 &endpos
, (EMACS_INT
*) 0, 1);
3962 /* If any of these overlays ends before endpos,
3963 use its ending point instead. */
3964 for (i
= 0; i
< noverlays
; i
++)
3969 oend
= OVERLAY_END (overlay_vec
[i
]);
3970 oendpos
= OVERLAY_POSITION (oend
);
3971 if (oendpos
< endpos
)
3975 xfree (overlay_vec
);
3976 return make_number (endpos
);
3979 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3980 Sprevious_overlay_change
, 1, 1, 0,
3981 doc
: /* Return the previous position before POS where an overlay starts or ends.
3982 If there are no overlay boundaries from (point-min) to POS,
3983 the value is (point-min). */)
3987 Lisp_Object
*overlay_vec
;
3990 CHECK_NUMBER_COERCE_MARKER (pos
);
3992 /* At beginning of buffer, we know the answer;
3993 avoid bug subtracting 1 below. */
3994 if (XINT (pos
) == BEGV
)
3998 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4000 /* Put all the overlays we want in a vector in overlay_vec.
4001 Store the length in len.
4002 prevpos gets the position of the previous change. */
4003 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4004 (EMACS_INT
*) 0, &prevpos
, 1);
4006 xfree (overlay_vec
);
4007 return make_number (prevpos
);
4010 /* These functions are for debugging overlays. */
4012 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4013 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4014 The car has all the overlays before the overlay center;
4015 the cdr has all the overlays after the overlay center.
4016 Recentering overlays moves overlays between these lists.
4017 The lists you get are copies, so that changing them has no effect.
4018 However, the overlays you get are the real objects that the buffer uses. */)
4021 struct Lisp_Overlay
*ol
;
4022 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4023 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4026 before
= Fcons (tmp
, before
);
4028 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4031 after
= Fcons (tmp
, after
);
4033 return Fcons (Fnreverse (before
), Fnreverse (after
));
4036 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4037 doc
: /* Recenter the overlays of the current buffer around position POS.
4038 That makes overlay lookup faster for positions near POS (but perhaps slower
4039 for positions far away from POS). */)
4042 CHECK_NUMBER_COERCE_MARKER (pos
);
4044 recenter_overlay_lists (current_buffer
, XINT (pos
));
4048 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4049 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4050 (Lisp_Object overlay
, Lisp_Object prop
)
4052 CHECK_OVERLAY (overlay
);
4053 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4056 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4057 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4058 VALUE will be returned.*/)
4059 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4061 Lisp_Object tail
, buffer
;
4064 CHECK_OVERLAY (overlay
);
4066 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4068 for (tail
= XOVERLAY (overlay
)->plist
;
4069 CONSP (tail
) && CONSP (XCDR (tail
));
4070 tail
= XCDR (XCDR (tail
)))
4071 if (EQ (XCAR (tail
), prop
))
4073 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4074 XSETCAR (XCDR (tail
), value
);
4077 /* It wasn't in the list, so add it to the front. */
4078 changed
= !NILP (value
);
4079 XOVERLAY (overlay
)->plist
4080 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4082 if (! NILP (buffer
))
4085 modify_overlay (XBUFFER (buffer
),
4086 marker_position (OVERLAY_START (overlay
)),
4087 marker_position (OVERLAY_END (overlay
)));
4088 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4089 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4090 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4091 Fdelete_overlay (overlay
);
4097 /* Subroutine of report_overlay_modification. */
4099 /* Lisp vector holding overlay hook functions to call.
4100 Vector elements come in pairs.
4101 Each even-index element is a list of hook functions.
4102 The following odd-index element is the overlay they came from.
4104 Before the buffer change, we fill in this vector
4105 as we call overlay hook functions.
4106 After the buffer change, we get the functions to call from this vector.
4107 This way we always call the same functions before and after the change. */
4108 static Lisp_Object last_overlay_modification_hooks
;
4110 /* Number of elements actually used in last_overlay_modification_hooks. */
4111 static int last_overlay_modification_hooks_used
;
4113 /* Add one functionlist/overlay pair
4114 to the end of last_overlay_modification_hooks. */
4117 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4119 int oldsize
= ASIZE (last_overlay_modification_hooks
);
4121 if (last_overlay_modification_hooks_used
== oldsize
)
4122 last_overlay_modification_hooks
= larger_vector
4123 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4124 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4125 functionlist
); last_overlay_modification_hooks_used
++;
4126 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4127 overlay
); last_overlay_modification_hooks_used
++;
4130 /* Run the modification-hooks of overlays that include
4131 any part of the text in START to END.
4132 If this change is an insertion, also
4133 run the insert-before-hooks of overlay starting at END,
4134 and the insert-after-hooks of overlay ending at START.
4136 This is called both before and after the modification.
4137 AFTER is nonzero when we call after the modification.
4139 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4140 When AFTER is nonzero, they are the start position,
4141 the position after the inserted new text,
4142 and the length of deleted or replaced old text. */
4145 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4146 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4148 Lisp_Object prop
, overlay
;
4149 struct Lisp_Overlay
*tail
;
4150 /* 1 if this change is an insertion. */
4151 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4152 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4157 /* We used to run the functions as soon as we found them and only register
4158 them in last_overlay_modification_hooks for the purpose of the `after'
4159 case. But running elisp code as we traverse the list of overlays is
4160 painful because the list can be modified by the elisp code so we had to
4161 copy at several places. We now simply do a read-only traversal that
4162 only collects the functions to run and we run them afterwards. It's
4163 simpler, especially since all the code was already there. -stef */
4167 /* We are being called before a change.
4168 Scan the overlays to find the functions to call. */
4169 last_overlay_modification_hooks_used
= 0;
4170 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4172 EMACS_INT startpos
, endpos
;
4173 Lisp_Object ostart
, oend
;
4175 XSETMISC (overlay
, tail
);
4177 ostart
= OVERLAY_START (overlay
);
4178 oend
= OVERLAY_END (overlay
);
4179 endpos
= OVERLAY_POSITION (oend
);
4180 if (XFASTINT (start
) > endpos
)
4182 startpos
= OVERLAY_POSITION (ostart
);
4183 if (insertion
&& (XFASTINT (start
) == startpos
4184 || XFASTINT (end
) == startpos
))
4186 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4188 add_overlay_mod_hooklist (prop
, overlay
);
4190 if (insertion
&& (XFASTINT (start
) == endpos
4191 || XFASTINT (end
) == endpos
))
4193 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4195 add_overlay_mod_hooklist (prop
, overlay
);
4197 /* Test for intersecting intervals. This does the right thing
4198 for both insertion and deletion. */
4199 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4201 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4203 add_overlay_mod_hooklist (prop
, overlay
);
4207 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4209 EMACS_INT startpos
, endpos
;
4210 Lisp_Object ostart
, oend
;
4212 XSETMISC (overlay
, tail
);
4214 ostart
= OVERLAY_START (overlay
);
4215 oend
= OVERLAY_END (overlay
);
4216 startpos
= OVERLAY_POSITION (ostart
);
4217 endpos
= OVERLAY_POSITION (oend
);
4218 if (XFASTINT (end
) < startpos
)
4220 if (insertion
&& (XFASTINT (start
) == startpos
4221 || XFASTINT (end
) == startpos
))
4223 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4225 add_overlay_mod_hooklist (prop
, overlay
);
4227 if (insertion
&& (XFASTINT (start
) == endpos
4228 || XFASTINT (end
) == endpos
))
4230 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4232 add_overlay_mod_hooklist (prop
, overlay
);
4234 /* Test for intersecting intervals. This does the right thing
4235 for both insertion and deletion. */
4236 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4238 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4240 add_overlay_mod_hooklist (prop
, overlay
);
4245 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4247 /* Call the functions recorded in last_overlay_modification_hooks.
4248 First copy the vector contents, in case some of these hooks
4249 do subsequent modification of the buffer. */
4250 int size
= last_overlay_modification_hooks_used
;
4251 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4254 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4255 size
* sizeof (Lisp_Object
));
4257 gcpro1
.nvars
= size
;
4259 for (i
= 0; i
< size
;)
4261 Lisp_Object prop_i
, overlay_i
;
4263 overlay_i
= copy
[i
++];
4264 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4271 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4272 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4274 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4276 GCPRO4 (list
, arg1
, arg2
, arg3
);
4278 while (CONSP (list
))
4281 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4283 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4289 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4292 evaporate_overlays (EMACS_INT pos
)
4294 Lisp_Object overlay
, hit_list
;
4295 struct Lisp_Overlay
*tail
;
4298 if (pos
<= current_buffer
->overlay_center
)
4299 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4302 XSETMISC (overlay
, tail
);
4303 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4306 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4307 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4308 hit_list
= Fcons (overlay
, hit_list
);
4311 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4314 XSETMISC (overlay
, tail
);
4315 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4318 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4319 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4320 hit_list
= Fcons (overlay
, hit_list
);
4322 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4323 Fdelete_overlay (XCAR (hit_list
));
4326 /* Somebody has tried to store a value with an unacceptable type
4327 in the slot with offset OFFSET. */
4330 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4332 Lisp_Object predicate
;
4336 case_Lisp_Int
: predicate
= Qintegerp
; break;
4337 case Lisp_String
: predicate
= Qstringp
; break;
4338 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4342 wrong_type_argument (predicate
, newval
);
4346 /***********************************************************************
4347 Allocation with mmap
4348 ***********************************************************************/
4350 #ifdef USE_MMAP_FOR_BUFFERS
4352 #include <sys/types.h>
4353 #include <sys/mman.h>
4356 #ifdef MAP_ANONYMOUS
4357 #define MAP_ANON MAP_ANONYMOUS
4364 #define MAP_FAILED ((void *) -1)
4376 /* Memory is allocated in regions which are mapped using mmap(2).
4377 The current implementation lets the system select mapped
4378 addresses; we're not using MAP_FIXED in general, except when
4379 trying to enlarge regions.
4381 Each mapped region starts with a mmap_region structure, the user
4382 area starts after that structure, aligned to MEM_ALIGN.
4384 +-----------------------+
4385 | struct mmap_info + |
4387 +-----------------------+
4391 +-----------------------+ */
4395 /* User-specified size. */
4396 size_t nbytes_specified
;
4398 /* Number of bytes mapped */
4399 size_t nbytes_mapped
;
4401 /* Pointer to the location holding the address of the memory
4402 allocated with the mmap'd block. The variable actually points
4403 after this structure. */
4406 /* Next and previous in list of all mmap'd regions. */
4407 struct mmap_region
*next
, *prev
;
4410 /* Doubly-linked list of mmap'd regions. */
4412 static struct mmap_region
*mmap_regions
;
4414 /* File descriptor for mmap. If we don't have anonymous mapping,
4415 /dev/zero will be opened on it. */
4419 /* Temporary storage for mmap_set_vars, see there. */
4421 static struct mmap_region
*mmap_regions_1
;
4422 static int mmap_fd_1
;
4424 /* Page size on this system. */
4426 static int mmap_page_size
;
4428 /* 1 means mmap has been intialized. */
4430 static int mmap_initialized_p
;
4432 /* Value is X rounded up to the next multiple of N. */
4434 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4436 /* Size of mmap_region structure plus padding. */
4438 #define MMAP_REGION_STRUCT_SIZE \
4439 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4441 /* Given a pointer P to the start of the user-visible part of a mapped
4442 region, return a pointer to the start of the region. */
4444 #define MMAP_REGION(P) \
4445 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4447 /* Given a pointer P to the start of a mapped region, return a pointer
4448 to the start of the user-visible part of the region. */
4450 #define MMAP_USER_AREA(P) \
4451 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4453 #define MEM_ALIGN sizeof (double)
4455 /* Predicate returning true if part of the address range [START .. END]
4456 is currently mapped. Used to prevent overwriting an existing
4459 Default is to conservativly assume the address range is occupied by
4460 something else. This can be overridden by system configuration
4461 files if system-specific means to determine this exists. */
4463 #ifndef MMAP_ALLOCATED_P
4464 #define MMAP_ALLOCATED_P(start, end) 1
4467 /* Perform necessary intializations for the use of mmap. */
4473 /* The value of mmap_fd is initially 0 in temacs, and -1
4474 in a dumped Emacs. */
4477 /* No anonymous mmap -- we need the file descriptor. */
4478 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4480 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4482 #endif /* MAP_ANON == 0 */
4484 if (mmap_initialized_p
)
4486 mmap_initialized_p
= 1;
4492 mmap_page_size
= getpagesize ();
4495 /* Return a region overlapping address range START...END, or null if
4496 none. END is not including, i.e. the last byte in the range
4499 static struct mmap_region
*
4500 mmap_find (POINTER_TYPE
*start
, POINTER_TYPE
*end
)
4502 struct mmap_region
*r
;
4503 char *s
= (char *) start
, *e
= (char *) end
;
4505 for (r
= mmap_regions
; r
; r
= r
->next
)
4507 char *rstart
= (char *) r
;
4508 char *rend
= rstart
+ r
->nbytes_mapped
;
4510 if (/* First byte of range, i.e. START, in this region? */
4511 (s
>= rstart
&& s
< rend
)
4512 /* Last byte of range, i.e. END - 1, in this region? */
4513 || (e
> rstart
&& e
<= rend
)
4514 /* First byte of this region in the range? */
4515 || (rstart
>= s
&& rstart
< e
)
4516 /* Last byte of this region in the range? */
4517 || (rend
> s
&& rend
<= e
))
4525 /* Unmap a region. P is a pointer to the start of the user-araa of
4526 the region. Value is non-zero if successful. */
4529 mmap_free_1 (struct mmap_region
*r
)
4532 r
->next
->prev
= r
->prev
;
4534 r
->prev
->next
= r
->next
;
4536 mmap_regions
= r
->next
;
4538 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4540 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4548 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4549 Value is non-zero if successful. */
4552 mmap_enlarge (struct mmap_region
*r
, int npages
)
4554 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4560 /* Unmap pages at the end of the region. */
4561 nbytes
= - npages
* mmap_page_size
;
4562 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4563 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4566 r
->nbytes_mapped
-= nbytes
;
4570 else if (npages
> 0)
4572 nbytes
= npages
* mmap_page_size
;
4574 /* Try to map additional pages at the end of the region. We
4575 cannot do this if the address range is already occupied by
4576 something else because mmap deletes any previous mapping.
4577 I'm not sure this is worth doing, let's see. */
4578 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4582 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4583 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4584 if (p
== MAP_FAILED
)
4585 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4586 else if (p
!= (POINTER_TYPE
*) region_end
)
4588 /* Kernels are free to choose a different address. In
4589 that case, unmap what we've mapped above; we have
4591 if (munmap (p
, nbytes
) == -1)
4592 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4596 r
->nbytes_mapped
+= nbytes
;
4606 /* Set or reset variables holding references to mapped regions. If
4607 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4608 non-zero, set all variables to the start of the user-areas
4611 This function is called from Fdump_emacs to ensure that the dumped
4612 Emacs doesn't contain references to memory that won't be mapped
4613 when Emacs starts. */
4616 mmap_set_vars (int restore_p
)
4618 struct mmap_region
*r
;
4622 mmap_regions
= mmap_regions_1
;
4623 mmap_fd
= mmap_fd_1
;
4624 for (r
= mmap_regions
; r
; r
= r
->next
)
4625 *r
->var
= MMAP_USER_AREA (r
);
4629 for (r
= mmap_regions
; r
; r
= r
->next
)
4631 mmap_regions_1
= mmap_regions
;
4632 mmap_regions
= NULL
;
4633 mmap_fd_1
= mmap_fd
;
4639 /* Allocate a block of storage large enough to hold NBYTES bytes of
4640 data. A pointer to the data is returned in *VAR. VAR is thus the
4641 address of some variable which will use the data area.
4643 The allocation of 0 bytes is valid.
4645 If we can't allocate the necessary memory, set *VAR to null, and
4648 static POINTER_TYPE
*
4649 mmap_alloc (POINTER_TYPE
**var
, size_t nbytes
)
4656 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4657 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4660 if (p
== MAP_FAILED
)
4662 if (errno
!= ENOMEM
)
4663 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4668 struct mmap_region
*r
= (struct mmap_region
*) p
;
4670 r
->nbytes_specified
= nbytes
;
4671 r
->nbytes_mapped
= map
;
4674 r
->next
= mmap_regions
;
4679 p
= MMAP_USER_AREA (p
);
4686 /* Free a block of relocatable storage whose data is pointed to by
4687 PTR. Store 0 in *PTR to show there's no block allocated. */
4690 mmap_free (POINTER_TYPE
**var
)
4696 mmap_free_1 (MMAP_REGION (*var
));
4702 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4703 resize it to size NBYTES. Change *VAR to reflect the new block,
4704 and return this value. If more memory cannot be allocated, then
4705 leave *VAR unchanged, and return null. */
4707 static POINTER_TYPE
*
4708 mmap_realloc (POINTER_TYPE
**var
, size_t nbytes
)
4710 POINTER_TYPE
*result
;
4715 result
= mmap_alloc (var
, nbytes
);
4716 else if (nbytes
== 0)
4719 result
= mmap_alloc (var
, nbytes
);
4723 struct mmap_region
*r
= MMAP_REGION (*var
);
4724 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4729 POINTER_TYPE
*old_ptr
= *var
;
4731 /* Try to map additional pages at the end of the region.
4732 If that fails, allocate a new region, copy data
4733 from the old region, then free it. */
4734 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4737 r
->nbytes_specified
= nbytes
;
4738 *var
= result
= old_ptr
;
4740 else if (mmap_alloc (var
, nbytes
))
4742 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4743 mmap_free_1 (MMAP_REGION (old_ptr
));
4745 r
= MMAP_REGION (result
);
4746 r
->nbytes_specified
= nbytes
;
4754 else if (room
- nbytes
>= mmap_page_size
)
4756 /* Shrinking by at least a page. Let's give some
4757 memory back to the system.
4759 The extra parens are to make the division happens first,
4760 on positive values, so we know it will round towards
4762 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4764 r
->nbytes_specified
= nbytes
;
4768 /* Leave it alone. */
4770 r
->nbytes_specified
= nbytes
;
4778 #endif /* USE_MMAP_FOR_BUFFERS */
4782 /***********************************************************************
4783 Buffer-text Allocation
4784 ***********************************************************************/
4787 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4788 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4789 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4790 #endif /* REL_ALLOC */
4793 /* Allocate NBYTES bytes for buffer B's text buffer. */
4796 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4801 #if defined USE_MMAP_FOR_BUFFERS
4802 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4803 #elif defined REL_ALLOC
4804 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4806 p
= xmalloc (nbytes
);
4812 memory_full (nbytes
);
4815 b
->text
->beg
= (unsigned char *) p
;
4819 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4823 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
4826 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4829 #if defined USE_MMAP_FOR_BUFFERS
4830 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4831 #elif defined REL_ALLOC
4832 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4834 p
= xrealloc (b
->text
->beg
, nbytes
);
4840 memory_full (nbytes
);
4843 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4848 /* Free buffer B's text buffer. */
4851 free_buffer_text (struct buffer
*b
)
4855 #if defined USE_MMAP_FOR_BUFFERS
4856 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4857 #elif defined REL_ALLOC
4858 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4860 xfree (b
->text
->beg
);
4863 BUF_BEG_ADDR (b
) = NULL
;
4869 /***********************************************************************
4871 ***********************************************************************/
4874 init_buffer_once (void)
4878 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4880 /* Make sure all markable slots in buffer_defaults
4881 are initialized reasonably, so mark_buffer won't choke. */
4882 reset_buffer (&buffer_defaults
);
4883 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4884 reset_buffer_local_variables (&buffer_defaults
, 1);
4885 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4886 reset_buffer (&buffer_local_symbols
);
4887 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4888 /* Prevent GC from getting confused. */
4889 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4890 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4891 BUF_INTERVALS (&buffer_defaults
) = 0;
4892 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4893 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4894 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4895 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4896 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4898 /* Set up the default values of various buffer slots. */
4899 /* Must do these before making the first buffer! */
4901 /* real setup is done in bindings.el */
4902 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4903 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4904 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4905 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4906 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4907 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4908 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4910 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4912 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4913 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4914 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4915 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4916 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4917 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4918 buffer_defaults
.overlays_before
= NULL
;
4919 buffer_defaults
.overlays_after
= NULL
;
4920 buffer_defaults
.overlay_center
= BEG
;
4922 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4923 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4924 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4925 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4926 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qnil
;
4927 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4928 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4929 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4930 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4932 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4933 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4934 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4935 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4936 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4937 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4938 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4939 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4940 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4941 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4942 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4943 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4944 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4945 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4946 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4947 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4948 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4949 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4950 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4951 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4952 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4954 /* Assign the local-flags to the slots that have default values.
4955 The local flag is a bit that is used in the buffer
4956 to say that it has its own local value for the slot.
4957 The local flag bits are in the local_var_flags slot of the buffer. */
4959 /* Nothing can work if this isn't true */
4960 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4962 /* 0 means not a lisp var, -1 means always local, else mask */
4963 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4964 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4965 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4966 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4967 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4968 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4969 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4970 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4971 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4972 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4973 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4974 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4975 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4976 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4977 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4978 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4979 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4980 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4981 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4984 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
5002 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
5003 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5004 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5005 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5007 /* Make this one a permanent local. */
5008 buffer_permanent_local_flags
[idx
++] = 1;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5022 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5023 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5024 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5025 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5027 /* Need more room? */
5028 if (idx
>= MAX_PER_BUFFER_VARS
)
5030 last_per_buffer_idx
= idx
;
5032 Vbuffer_alist
= Qnil
;
5036 QSFundamental
= make_pure_c_string ("Fundamental");
5038 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5039 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5041 Qmode_class
= intern_c_string ("mode-class");
5043 Qprotected_field
= intern_c_string ("protected-field");
5045 Qpermanent_local
= intern_c_string ("permanent-local");
5047 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5048 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5050 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5052 /* super-magic invisible buffer */
5053 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5054 Vbuffer_alist
= Qnil
;
5056 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5058 inhibit_modification_hooks
= 0;
5068 #ifdef USE_MMAP_FOR_BUFFERS
5070 /* When using the ralloc implementation based on mmap(2), buffer
5071 text pointers will have been set to null in the dumped Emacs.
5075 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5076 if (b
->text
->beg
== NULL
)
5077 enlarge_buffer_text (b
, 0);
5079 #endif /* USE_MMAP_FOR_BUFFERS */
5081 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5082 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5083 Fset_buffer_multibyte (Qnil
);
5085 pwd
= get_current_dir_name ();
5088 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5090 /* Maybe this should really use some standard subroutine
5091 whose definition is filename syntax dependent. */
5093 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5095 /* Grow buffer to add directory separator and '\0'. */
5096 pwd
= (char *) realloc (pwd
, len
+ 2);
5098 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5099 pwd
[len
] = DIRECTORY_SEP
;
5100 pwd
[len
+ 1] = '\0';
5103 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5104 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5105 /* At this moment, we still don't know how to decode the
5106 directory name. So, we keep the bytes in multibyte form so
5107 that ENCODE_FILE correctly gets the original bytes. */
5108 BVAR (current_buffer
, directory
)
5109 = string_to_multibyte (BVAR (current_buffer
, directory
));
5111 /* Add /: to the front of the name
5112 if it would otherwise be treated as magic. */
5113 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5115 /* If the default dir is just /, TEMP is non-nil
5116 because of the ange-ftp completion handler.
5117 However, it is not necessary to turn / into /:/.
5118 So avoid doing that. */
5119 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5120 BVAR (current_buffer
, directory
)
5121 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5123 temp
= get_minibuffer (0);
5124 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5129 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5130 Object stored in the current buffer. address is the address of the slot
5131 in the buffer that is current now. */
5133 /* TYPE is nil for a general Lisp variable.
5134 An integer specifies a type; then only Lisp values
5135 with that type code are allowed (except that nil is allowed too).
5136 LNAME is the Lisp-level variable name.
5137 VNAME is the name of the buffer slot.
5138 DOC is a dummy where you write the doc string as a comment. */
5139 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5141 static struct Lisp_Buffer_Objfwd bo_fwd; \
5142 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5146 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5147 Lisp_Object
*address
, Lisp_Object type
)
5149 struct Lisp_Symbol
*sym
;
5152 sym
= XSYMBOL (intern (namestring
));
5153 offset
= (char *)address
- (char *)current_buffer
;
5155 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5156 bo_fwd
->offset
= offset
;
5157 bo_fwd
->slottype
= type
;
5158 sym
->declared_special
= 1;
5159 sym
->redirect
= SYMBOL_FORWARDED
;
5161 /* I tried to do the job without a cast, but it seems impossible.
5162 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5163 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5165 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5167 if (PER_BUFFER_IDX (offset
) == 0)
5168 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5169 slot of buffer_local_flags */
5174 /* initialize the buffer routines */
5176 syms_of_buffer (void)
5178 staticpro (&last_overlay_modification_hooks
);
5179 last_overlay_modification_hooks
5180 = Fmake_vector (make_number (10), Qnil
);
5182 staticpro (&Vbuffer_defaults
);
5183 staticpro (&Vbuffer_local_symbols
);
5184 staticpro (&Qfundamental_mode
);
5185 staticpro (&Qmode_class
);
5186 staticpro (&QSFundamental
);
5187 staticpro (&Vbuffer_alist
);
5188 staticpro (&Qprotected_field
);
5189 staticpro (&Qpermanent_local
);
5190 staticpro (&Qkill_buffer_hook
);
5192 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5193 DEFSYM (Qoverlayp
, "overlayp");
5194 DEFSYM (Qevaporate
, "evaporate");
5195 DEFSYM (Qmodification_hooks
, "modification-hooks");
5196 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5197 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5198 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5199 DEFSYM (Qpriority
, "priority");
5200 DEFSYM (Qbefore_string
, "before-string");
5201 DEFSYM (Qafter_string
, "after-string");
5202 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5203 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5204 DEFSYM (Qafter_change_functions
, "after-change-functions");
5205 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5207 /* The next one is initialized in init_buffer_once. */
5208 staticpro (&Qucs_set_table_for_input
);
5210 Fput (Qprotected_field
, Qerror_conditions
,
5211 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5212 Fput (Qprotected_field
, Qerror_message
,
5213 make_pure_c_string ("Attempt to modify a protected field"));
5215 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5217 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5218 This is the same as (default-value 'mode-line-format). */);
5220 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5222 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5223 This is the same as (default-value 'header-line-format). */);
5225 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5226 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5227 This is the same as (default-value 'cursor-type). */);
5229 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5231 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5232 This is the same as (default-value 'line-spacing). */);
5234 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5235 cursor_in_non_selected_windows
,
5236 doc
: /* Default value of `cursor-in-non-selected-windows'.
5237 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5239 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5241 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5242 This is the same as (default-value 'abbrev-mode). */);
5244 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5246 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5247 This is the same as (default-value 'ctl-arrow). */);
5249 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5250 enable_multibyte_characters
,
5251 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5252 This is the same as (default-value 'enable-multibyte-characters). */);
5254 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5255 buffer_file_coding_system
,
5256 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5257 This is the same as (default-value 'buffer-file-coding-system). */);
5259 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5261 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5262 This is the same as (default-value 'truncate-lines). */);
5264 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5266 doc
: /* Default value of `fill-column' for buffers that do not override it.
5267 This is the same as (default-value 'fill-column). */);
5269 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5271 doc
: /* Default value of `left-margin' for buffers that do not override it.
5272 This is the same as (default-value 'left-margin). */);
5274 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5276 doc
: /* Default value of `tab-width' for buffers that do not override it.
5277 This is the same as (default-value 'tab-width). */);
5279 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5281 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5282 This is the same as (default-value 'case-fold-search). */);
5284 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5286 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5287 This is the same as (default-value 'left-margin-width). */);
5289 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5291 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5292 This is the same as (default-value 'right-margin-width). */);
5294 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5296 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5297 This is the same as (default-value 'left-fringe-width). */);
5299 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5301 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5302 This is the same as (default-value 'right-fringe-width). */);
5304 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5305 fringes_outside_margins
,
5306 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5307 This is the same as (default-value 'fringes-outside-margins). */);
5309 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5311 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5312 This is the same as (default-value 'scroll-bar-width). */);
5314 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5315 vertical_scroll_bar_type
,
5316 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5317 This is the same as (default-value 'vertical-scroll-bar). */);
5319 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5320 indicate_empty_lines
,
5321 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5322 This is the same as (default-value 'indicate-empty-lines). */);
5324 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5325 indicate_buffer_boundaries
,
5326 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5327 This is the same as (default-value 'indicate-buffer-boundaries). */);
5329 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5330 fringe_indicator_alist
,
5331 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5332 This is the same as (default-value 'fringe-indicator-alist'). */);
5334 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5335 fringe_cursor_alist
,
5336 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5337 This is the same as (default-value 'fringe-cursor-alist'). */);
5339 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5340 scroll_up_aggressively
,
5341 doc
: /* Default value of `scroll-up-aggressively'.
5342 This value applies in buffers that don't have their own local values.
5343 This is the same as (default-value 'scroll-up-aggressively). */);
5345 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5346 scroll_down_aggressively
,
5347 doc
: /* Default value of `scroll-down-aggressively'.
5348 This value applies in buffers that don't have their own local values.
5349 This is the same as (default-value 'scroll-down-aggressively). */);
5351 DEFVAR_PER_BUFFER ("header-line-format",
5352 &BVAR (current_buffer
, header_line_format
),
5354 doc
: /* Analogous to `mode-line-format', but controls the header line.
5355 The header line appears, optionally, at the top of a window;
5356 the mode line appears at the bottom. */);
5358 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5360 doc
: /* Template for displaying mode line for current buffer.
5361 Each buffer has its own value of this variable.
5362 Value may be nil, a string, a symbol or a list or cons cell.
5363 A value of nil means don't display a mode line.
5364 For a symbol, its value is used (but it is ignored if t or nil).
5365 A string appearing directly as the value of a symbol is processed verbatim
5366 in that the %-constructs below are not recognized.
5367 Note that unless the symbol is marked as a `risky-local-variable', all
5368 properties in any strings, as well as all :eval and :propertize forms
5369 in the value of that symbol will be ignored.
5370 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5371 is used as a mode line element. Be careful--FORM should not load any files,
5372 because that can cause an infinite recursion.
5373 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5374 with the specified properties PROPS applied.
5375 For a list whose car is a symbol, the symbol's value is taken,
5376 and if that is non-nil, the cadr of the list is processed recursively.
5377 Otherwise, the caddr of the list (if there is one) is processed.
5378 For a list whose car is a string or list, each element is processed
5379 recursively and the results are effectively concatenated.
5380 For a list whose car is an integer, the cdr of the list is processed
5381 and padded (if the number is positive) or truncated (if negative)
5382 to the width specified by that number.
5383 A string is printed verbatim in the mode line except for %-constructs:
5384 (%-constructs are allowed when the string is the entire mode-line-format
5385 or when it is found in a cons-cell or a list)
5386 %b -- print buffer name. %f -- print visited file name.
5387 %F -- print frame name.
5388 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5389 %& is like %*, but ignore read-only-ness.
5390 % means buffer is read-only and * means it is modified.
5391 For a modified read-only buffer, %* gives % and %+ gives *.
5392 %s -- print process status. %l -- print the current line number.
5393 %c -- print the current column number (this makes editing slower).
5394 To make the column number update correctly in all cases,
5395 `column-number-mode' must be non-nil.
5396 %i -- print the size of the buffer.
5397 %I -- like %i, but use k, M, G, etc., to abbreviate.
5398 %p -- print percent of buffer above top of window, or Top, Bot or All.
5399 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5400 or print Bottom or All.
5401 %n -- print Narrow if appropriate.
5402 %t -- visited file is text or binary (if OS supports this distinction).
5403 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5404 %Z -- like %z, but including the end-of-line format.
5405 %e -- print error message about full memory.
5406 %@ -- print @ or hyphen. @ means that default-directory is on a
5408 %[ -- print one [ for each recursive editing level. %] similar.
5409 %% -- print %. %- -- print infinitely many dashes.
5410 Decimal digits after the % specify field width to which to pad. */);
5412 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5413 doc
: /* *Value of `major-mode' for new buffers. */);
5415 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5416 make_number (Lisp_Symbol
),
5417 doc
: /* Symbol for current buffer's major mode.
5418 The default value (normally `fundamental-mode') affects new buffers.
5419 A value of nil means to use the current buffer's major mode, provided
5420 it is not marked as "special".
5422 When a mode is used by default, `find-file' switches to it before it
5423 reads the contents into the buffer and before it finishes setting up
5424 the buffer. Thus, the mode and its hooks should not expect certain
5425 variables such as `buffer-read-only' and `buffer-file-coding-system'
5428 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5430 doc
: /* Pretty name of current buffer's major mode.
5431 Usually a string, but can use any of the constructs for `mode-line-format',
5433 Format with `format-mode-line' to produce a string value. */);
5435 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5436 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5438 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5439 doc
: /* Non-nil if Abbrev mode is enabled.
5440 Use the command `abbrev-mode' to change this variable. */);
5442 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5444 doc
: /* *Non-nil if searches and matches should ignore case. */);
5446 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5447 make_number (LISP_INT_TAG
),
5448 doc
: /* *Column beyond which automatic line-wrapping should happen.
5449 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5451 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5452 make_number (LISP_INT_TAG
),
5453 doc
: /* *Column for the default `indent-line-function' to indent to.
5454 Linefeed indents to this column in Fundamental mode. */);
5456 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5457 make_number (LISP_INT_TAG
),
5458 doc
: /* *Distance between tab stops (for display of tab characters), in columns.
5459 This should be an integer greater than zero. */);
5461 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5462 doc
: /* *Non-nil means display control chars with uparrow.
5463 A value of nil means use backslash and octal digits.
5464 This variable does not apply to characters whose display is specified
5465 in the current display table (if there is one). */);
5467 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5468 &BVAR (current_buffer
, enable_multibyte_characters
),
5470 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5471 Otherwise they are regarded as unibyte. This affects the display,
5472 file I/O and the behavior of various editing commands.
5474 This variable is buffer-local but you cannot set it directly;
5475 use the function `set-buffer-multibyte' to change a buffer's representation.
5476 Changing its default value with `setq-default' is supported.
5477 See also variable `default-enable-multibyte-characters' and Info node
5478 `(elisp)Text Representations'. */);
5479 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5481 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5482 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5483 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5484 This variable applies to saving the buffer, and also to `write-region'
5485 and other functions that use `write-region'.
5486 It does not apply to sending output to subprocesses, however.
5488 If this is nil, the buffer is saved without any code conversion
5489 unless some coding system is specified in `file-coding-system-alist'
5490 for the buffer file.
5492 If the text to be saved cannot be encoded as specified by this variable,
5493 an alternative encoding is selected by `select-safe-coding-system', which see.
5495 The variable `coding-system-for-write', if non-nil, overrides this variable.
5497 This variable is never applied to a way of decoding a file while reading it. */);
5499 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5500 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5501 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5503 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5504 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5505 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5507 If this is nil (the default), the direction of each paragraph is
5508 determined by the first strong directional character of its text.
5509 The values of `right-to-left' and `left-to-right' override that.
5510 Any other value is treated as nil.
5512 This variable has no effect unless the buffer's value of
5513 \`bidi-display-reordering' is non-nil. */);
5515 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5516 doc
: /* *Non-nil means do not display continuation lines.
5517 Instead, give each line of text just one screen line.
5519 Note that this is overridden by the variable
5520 `truncate-partial-width-windows' if that variable is non-nil
5521 and this buffer is not full-frame width. */);
5523 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5524 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5525 When word-wrapping is on, continuation lines are wrapped at the space
5526 or tab character nearest to the right window edge.
5527 If nil, continuation lines are wrapped at the right screen edge.
5529 This variable has no effect if long lines are truncated (see
5530 `truncate-lines' and `truncate-partial-width-windows'). If you use
5531 word-wrapping, you might want to reduce the value of
5532 `truncate-partial-width-windows', since wrapping can make text readable
5533 in narrower windows. */);
5535 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5536 make_number (Lisp_String
),
5537 doc
: /* Name of default directory of current buffer. Should end with slash.
5538 To interactively change the default directory, use command `cd'. */);
5540 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5542 doc
: /* Function called (if non-nil) to perform auto-fill.
5543 It is called after self-inserting any character specified in
5544 the `auto-fill-chars' table.
5545 NOTE: This variable is not a hook;
5546 its value may not be a list of functions. */);
5548 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5549 make_number (Lisp_String
),
5550 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5552 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5553 make_number (Lisp_String
),
5554 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5555 The truename of a file is calculated by `file-truename'
5556 and then abbreviated with `abbreviate-file-name'. */);
5558 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5559 &BVAR (current_buffer
, auto_save_file_name
),
5560 make_number (Lisp_String
),
5561 doc
: /* Name of file for auto-saving current buffer.
5562 If it is nil, that means don't auto-save this buffer. */);
5564 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5565 doc
: /* Non-nil if this buffer is read-only. */);
5567 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5568 doc
: /* Non-nil if this buffer's file has been backed up.
5569 Backing up is done before the first time the file is saved. */);
5571 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5572 make_number (LISP_INT_TAG
),
5573 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5575 -1 means auto-saving turned off until next real save.
5577 If you set this to -2, that means don't turn off auto-saving in this buffer
5578 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5579 you probably should set this to -2 in that buffer. */);
5581 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5583 doc
: /* Non-nil enables selective display.
5584 An integer N as value means display only lines
5585 that start with less than N columns of space.
5586 A value of t means that the character ^M makes itself and
5587 all the rest of the line invisible; also, when saving the buffer
5588 in a file, save the ^M as a newline. */);
5591 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5592 &BVAR (current_buffer
, selective_display_ellipses
),
5594 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5597 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5598 doc
: /* Non-nil if self-insertion should replace existing text.
5599 The value should be one of `overwrite-mode-textual',
5600 `overwrite-mode-binary', or nil.
5601 If it is `overwrite-mode-textual', self-insertion still
5602 inserts at the end of a line, and inserts when point is before a tab,
5603 until the tab is filled in.
5604 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5606 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5608 doc
: /* Display table that controls display of the contents of current buffer.
5610 If this variable is nil, the value of `standard-display-table' is used.
5611 Each window can have its own, overriding display table, see
5612 `set-window-display-table' and `window-display-table'.
5614 The display table is a char-table created with `make-display-table'.
5615 A char-table is an array indexed by character codes. Normal array
5616 primitives `aref' and `aset' can be used to access elements of a char-table.
5618 Each of the char-table elements control how to display the corresponding
5619 text character: the element at index C in the table says how to display
5620 the character whose code is C. Each element should be a vector of
5621 characters or nil. The value nil means display the character in the
5622 default fashion; otherwise, the characters from the vector are delivered
5623 to the screen instead of the original character.
5625 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5626 to display a capital Y instead of each X character.
5628 In addition, a char-table has six extra slots to control the display of:
5630 the end of a truncated screen line (extra-slot 0, a single character);
5631 the end of a continued line (extra-slot 1, a single character);
5632 the escape character used to display character codes in octal
5633 (extra-slot 2, a single character);
5634 the character used as an arrow for control characters (extra-slot 3,
5635 a single character);
5636 the decoration indicating the presence of invisible lines (extra-slot 4,
5637 a vector of characters);
5638 the character used to draw the border between side-by-side windows
5639 (extra-slot 5, a single character).
5641 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5643 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5645 doc
: /* *Width of left marginal area for display of a buffer.
5646 A value of nil means no marginal area. */);
5648 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5650 doc
: /* *Width of right marginal area for display of a buffer.
5651 A value of nil means no marginal area. */);
5653 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5655 doc
: /* *Width of this buffer's left fringe (in pixels).
5656 A value of 0 means no left fringe is shown in this buffer's window.
5657 A value of nil means to use the left fringe width from the window's frame. */);
5659 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5661 doc
: /* *Width of this buffer's right fringe (in pixels).
5662 A value of 0 means no right fringe is shown in this buffer's window.
5663 A value of nil means to use the right fringe width from the window's frame. */);
5665 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5667 doc
: /* *Non-nil means to display fringes outside display margins.
5668 A value of nil means to display fringes between margins and buffer text. */);
5670 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5672 doc
: /* *Width of this buffer's scroll bars in pixels.
5673 A value of nil means to use the scroll bar width from the window's frame. */);
5675 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5677 doc
: /* *Position of this buffer's vertical scroll bar.
5678 The value takes effect whenever you tell a window to display this buffer;
5679 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5681 A value of `left' or `right' means put the vertical scroll bar at that side
5682 of the window; a value of nil means don't show any vertical scroll bars.
5683 A value of t (the default) means do whatever the window's frame specifies. */);
5685 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5686 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5687 doc
: /* *Visually indicate empty lines after the buffer end.
5688 If non-nil, a bitmap is displayed in the left fringe of a window on
5689 window-systems. */);
5691 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5692 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5693 doc
: /* *Visually indicate buffer boundaries and scrolling.
5694 If non-nil, the first and last line of the buffer are marked in the fringe
5695 of a window on window-systems with angle bitmaps, or if the window can be
5696 scrolled, the top and bottom line of the window are marked with up and down
5699 If value is a symbol `left' or `right', both angle and arrow bitmaps
5700 are displayed in the left or right fringe, resp. Any other value
5701 that doesn't look like an alist means display the angle bitmaps in
5702 the left fringe but no arrows.
5704 You can exercise more precise control by using an alist as the
5705 value. Each alist element (INDICATOR . POSITION) specifies
5706 where to show one of the indicators. INDICATOR is one of `top',
5707 `bottom', `up', `down', or t, which specifies the default position,
5708 and POSITION is one of `left', `right', or nil, meaning do not show
5711 For example, ((top . left) (t . right)) places the top angle bitmap in
5712 left fringe, the bottom angle bitmap in right fringe, and both arrow
5713 bitmaps in right fringe. To show just the angle bitmaps in the left
5714 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5716 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5717 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5718 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5719 The value is an alist where each element (INDICATOR . BITMAPS)
5720 specifies the fringe bitmaps used to display a specific logical
5723 INDICATOR specifies the logical indicator type which is one of the
5724 following symbols: `truncation' , `continuation', `overlay-arrow',
5725 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5727 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5728 the actual bitmap shown in the left or right fringe for the logical
5729 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5730 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5731 are used only for the `bottom' and `top-bottom' indicators when the
5732 last (only) line has no final newline. BITMAPS may also be a single
5733 symbol which is used in both left and right fringes. */);
5735 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5736 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5737 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5738 The value is an alist where each element (CURSOR . BITMAP)
5739 specifies the fringe bitmaps used to display a specific logical
5740 cursor type in the fringe.
5742 CURSOR specifies the logical cursor type which is one of the following
5743 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5744 one is used to show a hollow cursor on narrow lines display lines
5745 where the normal hollow cursor will not fit.
5747 BITMAP is the corresponding fringe bitmap shown for the logical
5750 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5751 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5752 doc
: /* How far to scroll windows upward.
5753 If you move point off the bottom, the window scrolls automatically.
5754 This variable controls how far it scrolls. The value nil, the default,
5755 means scroll to center point. A fraction means scroll to put point
5756 that fraction of the window's height from the bottom of the window.
5757 When the value is 0.0, point goes at the bottom line, which in the
5758 simple case that you moved off with C-f means scrolling just one line.
5759 1.0 means point goes at the top, so that in that simple case, the
5760 window scrolls by a full window height. Meaningful values are
5761 between 0.0 and 1.0, inclusive. */);
5763 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5764 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5765 doc
: /* How far to scroll windows downward.
5766 If you move point off the top, the window scrolls automatically.
5767 This variable controls how far it scrolls. The value nil, the default,
5768 means scroll to center point. A fraction means scroll to put point
5769 that fraction of the window's height from the top of the window.
5770 When the value is 0.0, point goes at the top line, which in the
5771 simple case that you moved off with C-b means scrolling just one line.
5772 1.0 means point goes at the bottom, so that in that simple case, the
5773 window scrolls by a full window height. Meaningful values are
5774 between 0.0 and 1.0, inclusive. */);
5776 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5780 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5781 doc
: /* List of functions to call before each text change.
5782 Two arguments are passed to each function: the positions of
5783 the beginning and end of the range of old text to be changed.
5784 \(For an insertion, the beginning and end are at the same place.)
5785 No information is given about the length of the text after the change.
5787 Buffer changes made while executing the `before-change-functions'
5788 don't call any before-change or after-change functions.
5789 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5791 If an unhandled error happens in running these functions,
5792 the variable's value remains nil. That prevents the error
5793 from happening repeatedly and making Emacs nonfunctional. */);
5794 Vbefore_change_functions
= Qnil
;
5796 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5797 doc
: /* List of functions to call after each text change.
5798 Three arguments are passed to each function: the positions of
5799 the beginning and end of the range of changed text,
5800 and the length in bytes of the pre-change text replaced by that range.
5801 \(For an insertion, the pre-change length is zero;
5802 for a deletion, that length is the number of bytes deleted,
5803 and the post-change beginning and end are at the same place.)
5805 Buffer changes made while executing the `after-change-functions'
5806 don't call any before-change or after-change functions.
5807 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5809 If an unhandled error happens in running these functions,
5810 the variable's value remains nil. That prevents the error
5811 from happening repeatedly and making Emacs nonfunctional. */);
5812 Vafter_change_functions
= Qnil
;
5814 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5815 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5816 The functions are run using the `run-hooks' function. */);
5817 Vfirst_change_hook
= Qnil
;
5819 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5820 doc
: /* List of undo entries in current buffer.
5821 Recent changes come first; older changes follow newer.
5823 An entry (BEG . END) represents an insertion which begins at
5824 position BEG and ends at position END.
5826 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5827 from (abs POSITION). If POSITION is positive, point was at the front
5828 of the text being deleted; if negative, point was at the end.
5830 An entry (t HIGH . LOW) indicates that the buffer previously had
5831 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5832 of the visited file's modification time, as of that time. If the
5833 modification time of the most recent save is different, this entry is
5836 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5837 was modified between BEG and END. PROPERTY is the property name,
5838 and VALUE is the old value.
5840 An entry (apply FUN-NAME . ARGS) means undo the change with
5841 \(apply FUN-NAME ARGS).
5843 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5844 in the active region. BEG and END is the range affected by this entry
5845 and DELTA is the number of bytes added or deleted in that range by
5848 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5849 was adjusted in position by the offset DISTANCE (an integer).
5851 An entry of the form POSITION indicates that point was at the buffer
5852 location given by the integer. Undoing an entry of this form places
5855 Entries with value `nil' mark undo boundaries. The undo command treats
5856 the changes between two undo boundaries as a single step to be undone.
5858 If the value of the variable is t, undo information is not recorded. */);
5860 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5861 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5863 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5864 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5866 Normally, the line-motion functions work by scanning the buffer for
5867 newlines. Columnar operations (like `move-to-column' and
5868 `compute-motion') also work by scanning the buffer, summing character
5869 widths as they go. This works well for ordinary text, but if the
5870 buffer's lines are very long (say, more than 500 characters), these
5871 motion functions will take longer to execute. Emacs may also take
5872 longer to update the display.
5874 If `cache-long-line-scans' is non-nil, these motion functions cache the
5875 results of their scans, and consult the cache to avoid rescanning
5876 regions of the buffer until the text is modified. The caches are most
5877 beneficial when they prevent the most searching---that is, when the
5878 buffer contains long lines and large regions of characters with the
5879 same, fixed screen width.
5881 When `cache-long-line-scans' is non-nil, processing short lines will
5882 become slightly slower (because of the overhead of consulting the
5883 cache), and the caches will use memory roughly proportional to the
5884 number of newlines and characters whose screen width varies.
5886 The caches require no explicit maintenance; their accuracy is
5887 maintained internally by the Emacs primitives. Enabling or disabling
5888 the cache should not affect the behavior of any of the motion
5889 functions; it should only affect their performance. */);
5891 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5892 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5894 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5895 doc
: /* List of formats to use when saving this buffer.
5896 Formats are defined by `format-alist'. This variable is
5897 set when a file is visited. */);
5899 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5900 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5901 doc
: /* *Format in which to write auto-save files.
5902 Should be a list of symbols naming formats that are defined in `format-alist'.
5903 If it is t, which is the default, auto-save files are written in the
5904 same format as a regular save would use. */);
5906 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5907 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5908 doc
: /* Invisibility spec of this buffer.
5909 The default is t, which means that text is invisible
5910 if it has a non-nil `invisible' property.
5911 If the value is a list, a text character is invisible if its `invisible'
5912 property is an element in that list (or is a list with members in common).
5913 If an element is a cons cell of the form (PROP . ELLIPSIS),
5914 then characters with property value PROP are invisible,
5915 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5917 DEFVAR_PER_BUFFER ("buffer-display-count",
5918 &BVAR (current_buffer
, display_count
), Qnil
,
5919 doc
: /* A number incremented each time this buffer is displayed in a window.
5920 The function `set-window-buffer' increments it. */);
5922 DEFVAR_PER_BUFFER ("buffer-display-time",
5923 &BVAR (current_buffer
, display_time
), Qnil
,
5924 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5925 The function `set-window-buffer' updates this variable
5926 to the value obtained by calling `current-time'.
5927 If the buffer has never been shown in a window, the value is nil. */);
5929 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5930 doc
: /* Non-nil if Transient Mark mode is enabled.
5931 See the command `transient-mark-mode' for a description of this minor mode.
5933 Non-nil also enables highlighting of the region whenever the mark is active.
5934 The variable `highlight-nonselected-windows' controls whether to highlight
5935 all windows or just the selected window.
5937 Lisp programs may give this variable certain special values:
5939 - A value of `lambda' enables Transient Mark mode temporarily.
5940 It is disabled again after any subsequent action that would
5941 normally deactivate the mark (e.g. buffer modification).
5943 - A value of (only . OLDVAL) enables Transient Mark mode
5944 temporarily. After any subsequent point motion command that is
5945 not shift-translated, or any other action that would normally
5946 deactivate the mark (e.g. buffer modification), the value of
5947 `transient-mark-mode' is set to OLDVAL. */);
5948 Vtransient_mark_mode
= Qnil
;
5950 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5951 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5952 If the value is t, disregard `buffer-read-only' and all `read-only'
5953 text properties. If the value is a list, disregard `buffer-read-only'
5954 and disregard a `read-only' text property if the property value
5955 is a member of the list. */);
5956 Vinhibit_read_only
= Qnil
;
5958 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5959 doc
: /* Cursor to use when this buffer is in the selected window.
5960 Values are interpreted as follows:
5962 t use the cursor specified for the frame
5963 nil don't display a cursor
5964 box display a filled box cursor
5965 hollow display a hollow box cursor
5966 bar display a vertical bar cursor with default width
5967 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5968 hbar display a horizontal bar cursor with default height
5969 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5970 ANYTHING ELSE display a hollow box cursor
5972 When the buffer is displayed in a non-selected window, the
5973 cursor's appearance is instead controlled by the variable
5974 `cursor-in-non-selected-windows'. */);
5976 DEFVAR_PER_BUFFER ("line-spacing",
5977 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5978 doc
: /* Additional space to put between lines when displaying a buffer.
5979 The space is measured in pixels, and put below lines on graphic displays,
5980 see `display-graphic-p'.
5981 If value is a floating point number, it specifies the spacing relative
5982 to the default frame line height. A value of nil means add no extra space. */);
5984 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5985 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5986 doc
: /* *Non-nil means show a cursor in non-selected windows.
5987 If nil, only shows a cursor in the selected window.
5988 If t, displays a cursor related to the usual cursor type
5989 \(a solid box becomes hollow, a bar becomes a narrower bar).
5990 You can also specify the cursor type as in the `cursor-type' variable.
5991 Use Custom to set this variable and update the display." */);
5993 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5994 doc
: /* List of functions called with no args to query before killing a buffer.
5995 The buffer being killed will be current while the functions are running.
5996 If any of them returns nil, the buffer is not killed. */);
5997 Vkill_buffer_query_functions
= Qnil
;
5999 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6000 doc
: /* Normal hook run before changing the major mode of a buffer.
6001 The function `kill-all-local-variables' runs this before doing anything else. */);
6002 Vchange_major_mode_hook
= Qnil
;
6003 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6005 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6006 doc
: /* Hook run when the buffer list changes.
6007 Functions running this hook are `get-buffer-create',
6008 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6009 `record-buffer' and `unrecord-buffer'. */);
6010 Vbuffer_list_update_hook
= Qnil
;
6011 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6013 defsubr (&Sbuffer_live_p
);
6014 defsubr (&Sbuffer_list
);
6015 defsubr (&Sget_buffer
);
6016 defsubr (&Sget_file_buffer
);
6017 defsubr (&Sget_buffer_create
);
6018 defsubr (&Smake_indirect_buffer
);
6019 defsubr (&Sgenerate_new_buffer_name
);
6020 defsubr (&Sbuffer_name
);
6021 /*defsubr (&Sbuffer_number);*/
6022 defsubr (&Sbuffer_file_name
);
6023 defsubr (&Sbuffer_base_buffer
);
6024 defsubr (&Sbuffer_local_value
);
6025 defsubr (&Sbuffer_local_variables
);
6026 defsubr (&Sbuffer_modified_p
);
6027 defsubr (&Sset_buffer_modified_p
);
6028 defsubr (&Sbuffer_modified_tick
);
6029 defsubr (&Sbuffer_chars_modified_tick
);
6030 defsubr (&Srename_buffer
);
6031 defsubr (&Sother_buffer
);
6032 defsubr (&Sbuffer_enable_undo
);
6033 defsubr (&Skill_buffer
);
6034 defsubr (&Srecord_buffer
);
6035 defsubr (&Sunrecord_buffer
);
6036 defsubr (&Sset_buffer_major_mode
);
6037 defsubr (&Scurrent_buffer
);
6038 defsubr (&Sset_buffer
);
6039 defsubr (&Sbarf_if_buffer_read_only
);
6040 defsubr (&Serase_buffer
);
6041 defsubr (&Sbuffer_swap_text
);
6042 defsubr (&Sset_buffer_multibyte
);
6043 defsubr (&Skill_all_local_variables
);
6045 defsubr (&Soverlayp
);
6046 defsubr (&Smake_overlay
);
6047 defsubr (&Sdelete_overlay
);
6048 defsubr (&Smove_overlay
);
6049 defsubr (&Soverlay_start
);
6050 defsubr (&Soverlay_end
);
6051 defsubr (&Soverlay_buffer
);
6052 defsubr (&Soverlay_properties
);
6053 defsubr (&Soverlays_at
);
6054 defsubr (&Soverlays_in
);
6055 defsubr (&Snext_overlay_change
);
6056 defsubr (&Sprevious_overlay_change
);
6057 defsubr (&Soverlay_recenter
);
6058 defsubr (&Soverlay_lists
);
6059 defsubr (&Soverlay_get
);
6060 defsubr (&Soverlay_put
);
6061 defsubr (&Srestore_buffer_modified_p
);
6065 keys_of_buffer (void)
6067 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6068 initial_define_key (control_x_map
, 'k', "kill-buffer");
6070 /* This must not be in syms_of_buffer, because Qdisabled is not
6071 initialized when that function gets called. */
6072 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);