1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997, 1998
3 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 2, or (at your option)
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; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
25 #include <sys/param.h>
31 /* in 4.1, param.h fails to define this. */
32 #define MAXPATHLEN 1024
33 #endif /* not MAXPATHLEN */
43 #include "intervals.h"
48 #include "region-cache.h"
50 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 struct buffer buffer_defaults
;
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the bit for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_var_flags slot.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure is negative, then even though there may
90 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
91 and the corresponding slot in buffer_defaults is not used.
93 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
94 zero, that is a bug */
96 struct buffer buffer_local_flags
;
98 /* This structure holds the names of symbols whose values may be
99 buffer-local. It is indexed and accessed in the same way as the above. */
101 struct buffer buffer_local_symbols
;
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static int buffer_permanent_local_flags
;
120 Lisp_Object
Fset_buffer ();
121 void set_buffer_internal ();
122 void set_buffer_internal_1 ();
123 static void call_overlay_mod_hooks ();
124 static void swap_out_buffer_local_variables ();
125 static void reset_buffer_local_variables ();
127 /* Alist of all buffer names vs the buffers. */
128 /* This used to be a variable, but is no longer,
129 to prevent lossage due to user rplac'ing this alist or its elements. */
130 Lisp_Object Vbuffer_alist
;
132 /* Functions to call before and after each text change. */
133 Lisp_Object Vbefore_change_function
;
134 Lisp_Object Vafter_change_function
;
135 Lisp_Object Vbefore_change_functions
;
136 Lisp_Object Vafter_change_functions
;
138 Lisp_Object Vtransient_mark_mode
;
140 /* t means ignore all read-only text properties.
141 A list means ignore such a property if its value is a member of the list.
142 Any non-nil value means ignore buffer-read-only. */
143 Lisp_Object Vinhibit_read_only
;
145 /* List of functions to call that can query about killing a buffer.
146 If any of these functions returns nil, we don't kill it. */
147 Lisp_Object Vkill_buffer_query_functions
;
149 /* List of functions to call before changing an unmodified buffer. */
150 Lisp_Object Vfirst_change_hook
;
152 Lisp_Object Qfirst_change_hook
;
153 Lisp_Object Qbefore_change_functions
;
154 Lisp_Object Qafter_change_functions
;
156 /* If nonzero, all modification hooks are suppressed. */
157 int inhibit_modification_hooks
;
159 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
161 Lisp_Object Qprotected_field
;
163 Lisp_Object QSFundamental
; /* A string "Fundamental" */
165 Lisp_Object Qkill_buffer_hook
;
167 Lisp_Object Qget_file_buffer
;
169 Lisp_Object Qoverlayp
;
171 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
173 Lisp_Object Qmodification_hooks
;
174 Lisp_Object Qinsert_in_front_hooks
;
175 Lisp_Object Qinsert_behind_hooks
;
177 /* For debugging; temporary. See set_buffer_internal. */
178 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
185 error ("No buffer named %s", XSTRING (spec
)->data
);
186 error ("Invalid buffer argument");
189 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
190 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
191 Value is nil if OBJECT is not a buffer or if it has been killed.")
195 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
199 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
200 "Return a list of all existing live buffers.\n\
201 If the optional arg FRAME is a frame, we return that frame's buffer list.")
205 Lisp_Object framelist
, general
;
206 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
212 CHECK_FRAME (frame
, 1);
214 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
216 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
218 while (! NILP (tail
))
220 general
= Fdelq (XCONS (tail
)->car
, general
);
221 tail
= XCONS (tail
)->cdr
;
223 return nconc2 (framelist
, general
);
229 /* Like Fassoc, but use Fstring_equal to compare
230 (which ignores text properties),
231 and don't ever QUIT. */
234 assoc_ignore_text_properties (key
, list
)
235 register Lisp_Object key
;
238 register Lisp_Object tail
;
239 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
241 register Lisp_Object elt
, tem
;
243 tem
= Fstring_equal (Fcar (elt
), key
);
250 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
251 "Return the buffer named NAME (a string).\n\
252 If there is no live buffer named NAME, return nil.\n\
253 NAME may also be a buffer; if so, the value is that buffer.")
255 register Lisp_Object name
;
259 CHECK_STRING (name
, 0);
261 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
264 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
265 "Return the buffer visiting file FILENAME (a string).\n\
266 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
267 If there is no such live buffer, return nil.\n\
268 See also `find-buffer-visiting'.")
270 register Lisp_Object filename
;
272 register Lisp_Object tail
, buf
, tem
;
275 CHECK_STRING (filename
, 0);
276 filename
= Fexpand_file_name (filename
, Qnil
);
278 /* If the file name has special constructs in it,
279 call the corresponding file handler. */
280 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
282 return call2 (handler
, Qget_file_buffer
, filename
);
284 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
286 buf
= Fcdr (XCONS (tail
)->car
);
287 if (!BUFFERP (buf
)) continue;
288 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
289 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
297 get_truename_buffer (filename
)
298 register Lisp_Object filename
;
300 register Lisp_Object tail
, buf
, tem
;
302 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
304 buf
= Fcdr (XCONS (tail
)->car
);
305 if (!BUFFERP (buf
)) continue;
306 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
307 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
314 /* Incremented for each buffer created, to assign the buffer number. */
317 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
318 "Return the buffer named NAME, or create such a buffer and return it.\n\
319 A new buffer is created if there is no live buffer named NAME.\n\
320 If NAME starts with a space, the new buffer does not keep undo information.\n\
321 If NAME is a buffer instead of a string, then it is the value returned.\n\
322 The value is never nil.")
324 register Lisp_Object name
;
326 register Lisp_Object buf
;
327 register struct buffer
*b
;
329 buf
= Fget_buffer (name
);
333 if (XSTRING (name
)->size
== 0)
334 error ("Empty string for buffer name is not allowed");
336 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
338 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
340 /* An ordinary buffer uses its own struct buffer_text. */
341 b
->text
= &b
->own_text
;
344 BUF_GAP_SIZE (b
) = 20;
346 /* We allocate extra 1-byte at the tail and keep it always '\0' for
347 anchoring a search. */
348 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
350 if (! BUF_BEG_ADDR (b
))
351 buffer_memory_full ();
359 BUF_GPT_BYTE (b
) = 1;
360 BUF_BEGV_BYTE (b
) = 1;
364 BUF_OVERLAY_MODIFF (b
) = 1;
365 BUF_SAVE_MODIFF (b
) = 1;
366 BUF_INTERVALS (b
) = 0;
367 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
369 b
->newline_cache
= 0;
370 b
->width_run_cache
= 0;
371 b
->width_table
= Qnil
;
373 /* Put this on the chain of all buffers including killed ones. */
374 b
->next
= all_buffers
;
377 /* An ordinary buffer normally doesn't need markers
378 to handle BEGV and ZV. */
380 b
->begv_marker
= Qnil
;
383 name
= Fcopy_sequence (name
);
384 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
387 if (XSTRING (name
)->data
[0] != ' ')
393 reset_buffer_local_variables (b
, 1);
395 /* Put this in the alist of all live buffers. */
397 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
399 b
->mark
= Fmake_marker ();
400 BUF_MARKERS (b
) = Qnil
;
405 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
406 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
407 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
408 BASE-BUFFER should be an existing buffer (or buffer name).\n\
409 NAME should be a string which is not the name of an existing buffer.")
411 register Lisp_Object base_buffer
, name
;
413 register Lisp_Object buf
;
414 register struct buffer
*b
;
416 buf
= Fget_buffer (name
);
418 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
420 base_buffer
= Fget_buffer (base_buffer
);
421 if (NILP (base_buffer
))
422 error ("No such buffer: `%s'",
423 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
425 if (XSTRING (name
)->size
== 0)
426 error ("Empty string for buffer name is not allowed");
428 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
430 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
432 if (XBUFFER (base_buffer
)->base_buffer
)
433 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
435 b
->base_buffer
= XBUFFER (base_buffer
);
437 /* Use the base buffer's text object. */
438 b
->text
= b
->base_buffer
->text
;
440 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
441 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
442 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
443 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
444 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
445 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
447 b
->newline_cache
= 0;
448 b
->width_run_cache
= 0;
449 b
->width_table
= Qnil
;
451 /* Put this on the chain of all buffers including killed ones. */
452 b
->next
= all_buffers
;
455 name
= Fcopy_sequence (name
);
456 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
460 reset_buffer_local_variables (b
, 1);
462 /* Put this in the alist of all live buffers. */
464 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
466 b
->mark
= Fmake_marker ();
469 /* Make sure the base buffer has markers for its narrowing. */
470 if (NILP (b
->base_buffer
->pt_marker
))
472 b
->base_buffer
->pt_marker
= Fmake_marker ();
473 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
474 BUF_PT (b
->base_buffer
),
475 BUF_PT_BYTE (b
->base_buffer
));
477 if (NILP (b
->base_buffer
->begv_marker
))
479 b
->base_buffer
->begv_marker
= Fmake_marker ();
480 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
481 BUF_BEGV (b
->base_buffer
),
482 BUF_BEGV_BYTE (b
->base_buffer
));
484 if (NILP (b
->base_buffer
->zv_marker
))
486 b
->base_buffer
->zv_marker
= Fmake_marker ();
487 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
488 BUF_ZV (b
->base_buffer
),
489 BUF_ZV_BYTE (b
->base_buffer
));
490 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
493 /* Give the indirect buffer markers for its narrowing. */
494 b
->pt_marker
= Fmake_marker ();
495 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
496 b
->begv_marker
= Fmake_marker ();
497 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
498 b
->zv_marker
= Fmake_marker ();
499 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
500 XMARKER (b
->zv_marker
)->insertion_type
= 1;
505 /* Reinitialize everything about a buffer except its name and contents
506 and local variables. */
510 register struct buffer
*b
;
513 b
->file_truename
= Qnil
;
514 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
516 XSETFASTINT (b
->save_length
, 0);
517 b
->last_window_start
= 1;
518 /* It is more conservative to start out "changed" than "unchanged". */
521 b
->auto_save_modified
= 0;
522 b
->auto_save_failure_time
= -1;
523 b
->auto_save_file_name
= Qnil
;
525 b
->overlays_before
= Qnil
;
526 b
->overlays_after
= Qnil
;
527 XSETFASTINT (b
->overlay_center
, 1);
528 b
->mark_active
= Qnil
;
529 b
->point_before_scroll
= Qnil
;
530 b
->file_format
= Qnil
;
531 b
->last_selected_window
= Qnil
;
532 XSETINT (b
->display_count
, 0);
533 b
->display_time
= Qnil
;
536 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
539 /* Reset buffer B's local variables info.
540 Don't use this on a buffer that has already been in use;
541 it does not treat permanent locals consistently.
542 Instead, use Fkill_all_local_variables.
544 If PERMANENT_TOO is 1, then we reset permanent built-in
545 buffer-local variables. If PERMANENT_TOO is 0,
546 we preserve those. */
549 reset_buffer_local_variables (b
, permanent_too
)
550 register struct buffer
*b
;
556 /* Decide which built-in local variables to reset. */
560 dont_reset
= buffer_permanent_local_flags
;
562 /* Reset the major mode to Fundamental, together with all the
563 things that depend on the major mode.
564 default-major-mode is handled at a higher level.
565 We ignore it here. */
566 b
->major_mode
= Qfundamental_mode
;
568 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
569 b
->mode_name
= QSFundamental
;
570 b
->minor_modes
= Qnil
;
572 /* If the standard case table has been altered and invalidated,
573 fix up its insides first. */
574 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
575 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
576 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
577 Fset_standard_case_table (Vascii_downcase_table
);
579 b
->downcase_table
= Vascii_downcase_table
;
580 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
581 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
582 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
583 b
->invisibility_spec
= Qt
;
585 b
->buffer_file_type
= Qnil
;
589 b
->sort_table
= XSTRING (Vascii_sort_table
);
590 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
593 /* Reset all (or most) per-buffer variables to their defaults. */
594 b
->local_var_alist
= Qnil
;
595 b
->local_var_flags
&= dont_reset
;
597 /* For each slot that has a default value,
598 copy that into the slot. */
600 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
601 offset
< sizeof (struct buffer
);
602 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
604 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
606 /* Don't reset a permanent local. */
607 && ! (dont_reset
& flag
))
609 *(Lisp_Object
*)(offset
+ (char *)b
)
610 = *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
614 /* We split this away from generate-new-buffer, because rename-buffer
615 and set-visited-file-name ought to be able to use this to really
616 rename the buffer properly. */
618 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
620 "Return a string that is the name of no existing buffer based on NAME.\n\
621 If there is no live buffer named NAME, then return NAME.\n\
622 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
623 until an unused name is found, and then return that name.\n\
624 Optional second argument IGNORE specifies a name that is okay to use\n\
625 \(if it is in the sequence to be tried)\n\
626 even if a buffer with that name exists.")
628 register Lisp_Object name
, ignore
;
630 register Lisp_Object gentemp
, tem
;
634 CHECK_STRING (name
, 0);
636 tem
= Fget_buffer (name
);
643 sprintf (number
, "<%d>", ++count
);
644 gentemp
= concat2 (name
, build_string (number
));
645 tem
= Fstring_equal (gentemp
, ignore
);
648 tem
= Fget_buffer (gentemp
);
655 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
656 "Return the name of BUFFER, as a string.\n\
657 With no argument or nil as argument, return the name of the current buffer.")
659 register Lisp_Object buffer
;
662 return current_buffer
->name
;
663 CHECK_BUFFER (buffer
, 0);
664 return XBUFFER (buffer
)->name
;
667 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
668 "Return name of file BUFFER is visiting, or nil if none.\n\
669 No argument or nil as argument means use the current buffer.")
671 register Lisp_Object buffer
;
674 return current_buffer
->filename
;
675 CHECK_BUFFER (buffer
, 0);
676 return XBUFFER (buffer
)->filename
;
679 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
681 "Return the base buffer of indirect buffer BUFFER.\n\
682 If BUFFER is not indirect, return nil.")
684 register Lisp_Object buffer
;
687 Lisp_Object base_buffer
;
690 base
= current_buffer
->base_buffer
;
693 CHECK_BUFFER (buffer
, 0);
694 base
= XBUFFER (buffer
)->base_buffer
;
699 XSETBUFFER (base_buffer
, base
);
703 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
704 Sbuffer_local_variables
, 0, 1, 0,
705 "Return an alist of variables that are buffer-local in BUFFER.\n\
706 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
707 For a symbol that is locally unbound, just the symbol appears in the value.\n\
708 Note that storing new VALUEs in these elements doesn't change the variables.\n\
709 No argument or nil as argument means use current buffer as BUFFER.")
711 register Lisp_Object buffer
;
713 register struct buffer
*buf
;
714 register Lisp_Object result
;
717 buf
= current_buffer
;
720 CHECK_BUFFER (buffer
, 0);
721 buf
= XBUFFER (buffer
);
727 register Lisp_Object tail
;
728 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
730 Lisp_Object val
, elt
;
732 elt
= XCONS (tail
)->car
;
734 /* Reference each variable in the alist in buf.
735 If inquiring about the current buffer, this gets the current values,
736 so store them into the alist so the alist is up to date.
737 If inquiring about some other buffer, this swaps out any values
738 for that buffer, making the alist up to date automatically. */
739 val
= find_symbol_value (XCONS (elt
)->car
);
740 /* Use the current buffer value only if buf is the current buffer. */
741 if (buf
!= current_buffer
)
742 val
= XCONS (elt
)->cdr
;
744 /* If symbol is unbound, put just the symbol in the list. */
745 if (EQ (val
, Qunbound
))
746 result
= Fcons (XCONS (elt
)->car
, result
);
747 /* Otherwise, put (symbol . value) in the list. */
749 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
753 /* Add on all the variables stored in special slots. */
755 register int offset
, mask
;
757 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
758 offset
< sizeof (struct buffer
);
759 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
761 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
762 if (mask
== -1 || (buf
->local_var_flags
& mask
))
763 if (SYMBOLP (*(Lisp_Object
*)(offset
764 + (char *)&buffer_local_symbols
)))
765 result
= Fcons (Fcons (*((Lisp_Object
*)
766 (offset
+ (char *)&buffer_local_symbols
)),
767 *(Lisp_Object
*)(offset
+ (char *)buf
)),
776 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
778 "Return t if BUFFER was modified since its file was last read or saved.\n\
779 No argument or nil as argument means use current buffer as BUFFER.")
781 register Lisp_Object buffer
;
783 register struct buffer
*buf
;
785 buf
= current_buffer
;
788 CHECK_BUFFER (buffer
, 0);
789 buf
= XBUFFER (buffer
);
792 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
795 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
797 "Mark current buffer as modified or unmodified according to FLAG.\n\
798 A non-nil FLAG means mark the buffer modified.")
800 register Lisp_Object flag
;
802 register int already
;
803 register Lisp_Object fn
;
805 #ifdef CLASH_DETECTION
806 /* If buffer becoming modified, lock the file.
807 If buffer becoming unmodified, unlock the file. */
809 fn
= current_buffer
->file_truename
;
812 already
= SAVE_MODIFF
< MODIFF
;
813 if (!already
&& !NILP (flag
))
815 else if (already
&& NILP (flag
))
818 #endif /* CLASH_DETECTION */
820 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
825 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
827 "Return BUFFER's tick counter, incremented for each change in text.\n\
828 Each buffer has a tick counter which is incremented each time the text in\n\
829 that buffer is changed. It wraps around occasionally.\n\
830 No argument or nil as argument means use current buffer as BUFFER.")
832 register Lisp_Object buffer
;
834 register struct buffer
*buf
;
836 buf
= current_buffer
;
839 CHECK_BUFFER (buffer
, 0);
840 buf
= XBUFFER (buffer
);
843 return make_number (BUF_MODIFF (buf
));
846 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
847 "sRename buffer (to new name): \nP",
848 "Change current buffer's name to NEWNAME (a string).\n\
849 If second arg UNIQUE is nil or omitted, it is an error if a\n\
850 buffer named NEWNAME already exists.\n\
851 If UNIQUE is non-nil, come up with a new name using\n\
852 `generate-new-buffer-name'.\n\
853 Interactively, you can set UNIQUE with a prefix argument.\n\
854 We return the name we actually gave the buffer.\n\
855 This does not change the name of the visited file (if any).")
857 register Lisp_Object newname
, unique
;
859 register Lisp_Object tem
, buf
;
861 CHECK_STRING (newname
, 0);
863 if (XSTRING (newname
)->size
== 0)
864 error ("Empty string is invalid as a buffer name");
866 tem
= Fget_buffer (newname
);
867 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
868 the buffer automatically so you can create another with the original name.
869 It makes UNIQUE equivalent to
870 (rename-buffer (generate-new-buffer-name NEWNAME)). */
871 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
872 return current_buffer
->name
;
876 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
878 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
881 current_buffer
->name
= newname
;
883 /* Catch redisplay's attention. Unless we do this, the mode lines for
884 any windows displaying current_buffer will stay unchanged. */
887 XSETBUFFER (buf
, current_buffer
);
888 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
889 if (NILP (current_buffer
->filename
)
890 && !NILP (current_buffer
->auto_save_file_name
))
891 call0 (intern ("rename-auto-save-file"));
892 /* Refetch since that last call may have done GC. */
893 return current_buffer
->name
;
896 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
897 "Return most recently selected buffer other than BUFFER.\n\
898 Buffers not visible in windows are preferred to visible buffers,\n\
899 unless optional second argument VISIBLE-OK is non-nil.\n\
900 If the optional third argument FRAME is non-nil, use that frame's\n\
901 buffer list instead of the selected frame's buffer list.\n\
902 If no other buffer exists, the buffer `*scratch*' is returned.\n\
903 If BUFFER is omitted or nil, some interesting buffer is returned.")
904 (buffer
, visible_ok
, frame
)
905 register Lisp_Object buffer
, visible_ok
, frame
;
907 Lisp_Object
Fset_buffer_major_mode ();
908 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
912 frame
= Fselected_frame ();
914 tail
= Vbuffer_alist
;
915 pred
= frame_buffer_predicate (frame
);
917 /* Consider buffers that have been seen in the selected frame
918 before other buffers. */
920 tem
= frame_buffer_list (frame
);
924 if (BUFFERP (XCONS (tem
)->car
))
925 add_ons
= Fcons (Fcons (Qnil
, XCONS (tem
)->car
), add_ons
);
926 tem
= XCONS (tem
)->cdr
;
928 tail
= nconc2 (Fnreverse (add_ons
), tail
);
930 for (; !NILP (tail
); tail
= Fcdr (tail
))
932 buf
= Fcdr (Fcar (tail
));
933 if (EQ (buf
, buffer
))
935 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
937 /* If the selected frame has a buffer_predicate,
938 disregard buffers that don't fit the predicate. */
941 tem
= call1 (pred
, buf
);
946 if (NILP (visible_ok
))
947 tem
= Fget_buffer_window (buf
, Qt
);
952 if (NILP (notsogood
))
955 if (!NILP (notsogood
))
957 buf
= Fget_buffer_create (build_string ("*scratch*"));
958 Fset_buffer_major_mode (buf
);
962 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
964 "Make BUFFER stop keeping undo information.\n\
965 No argument or nil as argument means do this for the current buffer.")
967 register Lisp_Object buffer
;
969 Lisp_Object real_buffer
;
972 XSETBUFFER (real_buffer
, current_buffer
);
975 real_buffer
= Fget_buffer (buffer
);
976 if (NILP (real_buffer
))
980 XBUFFER (real_buffer
)->undo_list
= Qt
;
985 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
987 "Start keeping undo information for buffer BUFFER.\n\
988 No argument or nil as argument means do this for the current buffer.")
990 register Lisp_Object buffer
;
992 Lisp_Object real_buffer
;
995 XSETBUFFER (real_buffer
, current_buffer
);
998 real_buffer
= Fget_buffer (buffer
);
999 if (NILP (real_buffer
))
1003 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1004 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1010 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1011 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1012 The buffer being killed will be current while the hook is running.\n\
1015 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1016 "Kill the buffer BUFFER.\n\
1017 The argument may be a buffer or may be the name of a buffer.\n\
1018 An argument of nil means kill the current buffer.\n\n\
1019 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1020 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1021 if not void, is a list of functions to be called, with no arguments,\n\
1022 before the buffer is actually killed. The buffer to be killed is current\n\
1023 when the hook functions are called.\n\n\
1024 Any processes that have this buffer as the `process-buffer' are killed\n\
1030 register struct buffer
*b
;
1031 register Lisp_Object tem
;
1032 register struct Lisp_Marker
*m
;
1033 struct gcpro gcpro1
, gcpro2
;
1036 buf
= Fcurrent_buffer ();
1038 buf
= Fget_buffer (buffer
);
1044 /* Avoid trouble for buffer already dead. */
1048 /* Query if the buffer is still modified. */
1049 if (INTERACTIVE
&& !NILP (b
->filename
)
1050 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1053 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1054 XSTRING (b
->name
)->data
));
1060 /* Run hooks with the buffer to be killed the current buffer. */
1062 register Lisp_Object val
;
1063 int count
= specpdl_ptr
- specpdl
;
1066 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1067 set_buffer_internal (b
);
1069 /* First run the query functions; if any query is answered no,
1070 don't kill the buffer. */
1071 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1073 tem
= call0 (Fcar (list
));
1075 return unbind_to (count
, Qnil
);
1078 /* Then run the hooks. */
1079 if (!NILP (Vrun_hooks
))
1080 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1081 unbind_to (count
, Qnil
);
1084 /* We have no more questions to ask. Verify that it is valid
1085 to kill the buffer. This must be done after the questions
1086 since anything can happen within do_yes_or_no_p. */
1088 /* Don't kill the minibuffer now current. */
1089 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1095 /* When we kill a base buffer, kill all its indirect buffers.
1096 We do it at this stage so nothing terrible happens if they
1097 ask questions or their hooks get errors. */
1098 if (! b
->base_buffer
)
1100 struct buffer
*other
;
1104 for (other
= all_buffers
; other
; other
= other
->next
)
1105 /* all_buffers contains dead buffers too;
1106 don't re-kill them. */
1107 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1110 XSETBUFFER (buf
, other
);
1117 /* Make this buffer not be current.
1118 In the process, notice if this is the sole visible buffer
1119 and give up if so. */
1120 if (b
== current_buffer
)
1122 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1124 if (b
== current_buffer
)
1128 /* Now there is no question: we can kill the buffer. */
1130 #ifdef CLASH_DETECTION
1131 /* Unlock this buffer's file, if it is locked. */
1133 #endif /* CLASH_DETECTION */
1135 kill_buffer_processes (buf
);
1137 tem
= Vinhibit_quit
;
1139 replace_buffer_in_all_windows (buf
);
1140 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1141 frames_discard_buffer (buf
);
1142 Vinhibit_quit
= tem
;
1144 /* Delete any auto-save file, if we saved it in this session. */
1145 if (STRINGP (b
->auto_save_file_name
)
1146 && b
->auto_save_modified
!= 0
1147 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1150 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1152 internal_delete_file (b
->auto_save_file_name
);
1157 /* Unchain all markers that belong to this indirect buffer.
1158 Don't unchain the markers that belong to the base buffer
1159 or its other indirect buffers. */
1160 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1166 unchain_marker (tem
);
1172 /* Unchain all markers of this buffer and its indirect buffers.
1173 and leave them pointing nowhere. */
1174 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1181 BUF_MARKERS (b
) = Qnil
;
1183 #ifdef USE_TEXT_PROPERTIES
1184 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1187 /* Perhaps we should explicitly free the interval tree here... */
1190 /* Reset the local variables, so that this buffer's local values
1191 won't be protected from GC. They would be protected
1192 if they happened to remain encached in their symbols.
1193 This gets rid of them for certain. */
1194 swap_out_buffer_local_variables (b
);
1195 reset_buffer_local_variables (b
, 1);
1200 if (! b
->base_buffer
)
1201 BUFFER_FREE (BUF_BEG_ADDR (b
));
1203 if (b
->newline_cache
)
1205 free_region_cache (b
->newline_cache
);
1206 b
->newline_cache
= 0;
1208 if (b
->width_run_cache
)
1210 free_region_cache (b
->width_run_cache
);
1211 b
->width_run_cache
= 0;
1213 b
->width_table
= Qnil
;
1215 b
->undo_list
= Qnil
;
1220 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1221 we do this each time BUF is selected visibly, the more recently
1222 selected buffers are always closer to the front of the list. This
1223 means that other_buffer is more likely to choose a relevant buffer. */
1229 register Lisp_Object link
, prev
;
1231 frame
= Fselected_frame ();
1234 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1236 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1241 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1242 we cannot use Fdelq itself here because it allows quitting. */
1245 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1247 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1249 XCONS (link
)->cdr
= Vbuffer_alist
;
1250 Vbuffer_alist
= link
;
1252 /* Now move this buffer to the front of frame_buffer_list also. */
1255 for (link
= frame_buffer_list (frame
); CONSP (link
);
1256 link
= XCONS (link
)->cdr
)
1258 if (EQ (XCONS (link
)->car
, buf
))
1263 /* Effectively do delq. */
1268 set_frame_buffer_list (frame
,
1269 XCONS (frame_buffer_list (frame
))->cdr
);
1271 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1273 XCONS (link
)->cdr
= frame_buffer_list (frame
);
1274 set_frame_buffer_list (frame
, link
);
1277 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1280 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1281 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1282 Use this function before selecting the buffer, since it may need to inspect\n\
1283 the current buffer's major mode.")
1288 Lisp_Object function
;
1290 function
= buffer_defaults
.major_mode
;
1291 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1292 function
= current_buffer
->major_mode
;
1294 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1297 count
= specpdl_ptr
- specpdl
;
1299 /* To select a nonfundamental mode,
1300 select the buffer temporarily and then call the mode function. */
1302 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1304 Fset_buffer (buffer
);
1307 return unbind_to (count
, Qnil
);
1310 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1311 "Select buffer BUFFER in the current window.\n\
1312 BUFFER may be a buffer or a buffer name.\n\
1313 Optional second arg NORECORD non-nil means\n\
1314 do not put this buffer at the front of the list of recently selected ones.\n\
1316 WARNING: This is NOT the way to work on another buffer temporarily\n\
1317 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1318 the window-buffer correspondences.")
1320 Lisp_Object buffer
, norecord
;
1322 register Lisp_Object buf
;
1325 if (EQ (minibuf_window
, selected_window
))
1326 error ("Cannot switch buffers in minibuffer window");
1327 tem
= Fwindow_dedicated_p (selected_window
);
1329 error ("Cannot switch buffers in a dedicated window");
1332 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1335 buf
= Fget_buffer (buffer
);
1338 buf
= Fget_buffer_create (buffer
);
1339 Fset_buffer_major_mode (buf
);
1343 if (NILP (norecord
))
1344 record_buffer (buf
);
1346 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1347 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1354 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1355 "Select buffer BUFFER in some window, preferably a different one.\n\
1356 If BUFFER is nil, then some other buffer is chosen.\n\
1357 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1358 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1359 window even if BUFFER is already visible in the selected window.\n\
1360 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1361 of `display-buffer' for additional customization information.\n\
1363 Optional third arg NORECORD non-nil means\n\
1364 do not put this buffer at the front of the list of recently selected ones.")
1365 (buffer
, other_window
, norecord
)
1366 Lisp_Object buffer
, other_window
, norecord
;
1368 register Lisp_Object buf
;
1370 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1373 buf
= Fget_buffer (buffer
);
1376 buf
= Fget_buffer_create (buffer
);
1377 Fset_buffer_major_mode (buf
);
1381 if (NILP (norecord
))
1382 record_buffer (buf
);
1383 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1387 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1388 "Return the current buffer as a Lisp object.")
1391 register Lisp_Object buf
;
1392 XSETBUFFER (buf
, current_buffer
);
1396 /* Set the current buffer to B. */
1399 set_buffer_internal (b
)
1400 register struct buffer
*b
;
1402 register struct buffer
*old_buf
;
1403 register Lisp_Object tail
, valcontents
;
1406 if (current_buffer
== b
)
1409 windows_or_buffers_changed
= 1;
1410 set_buffer_internal_1 (b
);
1413 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1414 This is used by redisplay. */
1417 set_buffer_internal_1 (b
)
1418 register struct buffer
*b
;
1420 register struct buffer
*old_buf
;
1421 register Lisp_Object tail
, valcontents
;
1424 if (current_buffer
== b
)
1427 old_buf
= current_buffer
;
1429 last_known_column_point
= -1; /* invalidate indentation cache */
1433 /* Put the undo list back in the base buffer, so that it appears
1434 that an indirect buffer shares the undo list of its base. */
1435 if (old_buf
->base_buffer
)
1436 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1438 /* If the old current buffer has markers to record PT, BEGV and ZV
1439 when it is not current, update them now. */
1440 if (! NILP (old_buf
->pt_marker
))
1443 XSETBUFFER (obuf
, old_buf
);
1444 set_marker_both (old_buf
->pt_marker
, obuf
,
1445 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1447 if (! NILP (old_buf
->begv_marker
))
1450 XSETBUFFER (obuf
, old_buf
);
1451 set_marker_both (old_buf
->begv_marker
, obuf
,
1452 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1454 if (! NILP (old_buf
->zv_marker
))
1457 XSETBUFFER (obuf
, old_buf
);
1458 set_marker_both (old_buf
->zv_marker
, obuf
,
1459 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1463 /* Get the undo list from the base buffer, so that it appears
1464 that an indirect buffer shares the undo list of its base. */
1466 b
->undo_list
= b
->base_buffer
->undo_list
;
1468 /* If the new current buffer has markers to record PT, BEGV and ZV
1469 when it is not current, fetch them now. */
1470 if (! NILP (b
->pt_marker
))
1472 BUF_PT (b
) = marker_position (b
->pt_marker
);
1473 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1475 if (! NILP (b
->begv_marker
))
1477 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1478 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1480 if (! NILP (b
->zv_marker
))
1482 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1483 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1486 /* Look down buffer's list of local Lisp variables
1487 to find and update any that forward into C variables. */
1489 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1491 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1492 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1493 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1494 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1495 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1496 /* Just reference the variable
1497 to cause it to become set for this buffer. */
1498 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1501 /* Do the same with any others that were local to the previous buffer */
1504 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1506 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1507 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1508 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1509 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1510 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1511 /* Just reference the variable
1512 to cause it to become set for this buffer. */
1513 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1517 /* Switch to buffer B temporarily for redisplay purposes.
1518 This avoids certain things that don't need to be done within redisplay. */
1524 register struct buffer
*old_buf
;
1526 if (current_buffer
== b
)
1529 old_buf
= current_buffer
;
1534 /* If the old current buffer has markers to record PT, BEGV and ZV
1535 when it is not current, update them now. */
1536 if (! NILP (old_buf
->pt_marker
))
1539 XSETBUFFER (obuf
, old_buf
);
1540 set_marker_both (old_buf
->pt_marker
, obuf
,
1541 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1543 if (! NILP (old_buf
->begv_marker
))
1546 XSETBUFFER (obuf
, old_buf
);
1547 set_marker_both (old_buf
->begv_marker
, obuf
,
1548 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1550 if (! NILP (old_buf
->zv_marker
))
1553 XSETBUFFER (obuf
, old_buf
);
1554 set_marker_both (old_buf
->zv_marker
, obuf
,
1555 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1559 /* If the new current buffer has markers to record PT, BEGV and ZV
1560 when it is not current, fetch them now. */
1561 if (! NILP (b
->pt_marker
))
1563 BUF_PT (b
) = marker_position (b
->pt_marker
);
1564 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1566 if (! NILP (b
->begv_marker
))
1568 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1569 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1571 if (! NILP (b
->zv_marker
))
1573 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1574 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1578 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1579 "Make the buffer BUFFER current for editing operations.\n\
1580 BUFFER may be a buffer or the name of an existing buffer.\n\
1581 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1582 This function does not display the buffer, so its effect ends\n\
1583 when the current command terminates.\n\
1584 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1586 register Lisp_Object buffer
;
1588 register Lisp_Object buf
;
1589 buf
= Fget_buffer (buffer
);
1592 if (NILP (XBUFFER (buf
)->name
))
1593 error ("Selecting deleted buffer");
1594 set_buffer_internal (XBUFFER (buf
));
1598 /* Set the current buffer to BUFFER provided it is alive. */
1601 set_buffer_if_live (buffer
)
1604 if (! NILP (XBUFFER (buffer
)->name
))
1605 Fset_buffer (buffer
);
1609 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1610 Sbarf_if_buffer_read_only
, 0, 0, 0,
1611 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1614 if (!NILP (current_buffer
->read_only
)
1615 && NILP (Vinhibit_read_only
))
1616 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1620 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1621 "Put BUFFER at the end of the list of all buffers.\n\
1622 There it is the least likely candidate for `other-buffer' to return;\n\
1623 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1624 If BUFFER is nil or omitted, bury the current buffer.\n\
1625 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1626 selected window if it is displayed there.")
1628 register Lisp_Object buffer
;
1630 /* Figure out what buffer we're going to bury. */
1633 XSETBUFFER (buffer
, current_buffer
);
1635 /* If we're burying the current buffer, unshow it. */
1636 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1642 buf1
= Fget_buffer (buffer
);
1648 /* Move buffer to the end of the buffer list. */
1650 register Lisp_Object aelt
, link
;
1652 aelt
= Frassq (buffer
, Vbuffer_alist
);
1653 link
= Fmemq (aelt
, Vbuffer_alist
);
1654 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1655 XCONS (link
)->cdr
= Qnil
;
1656 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1659 frames_bury_buffer (buffer
);
1664 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1665 "Delete the entire contents of the current buffer.\n\
1666 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1667 so the buffer is truly empty after this.")
1672 current_buffer
->last_window_start
= 1;
1673 /* Prevent warnings, or suspension of auto saving, that would happen
1674 if future size is less than past size. Use of erase-buffer
1675 implies that the future text is not really related to the past text. */
1676 XSETFASTINT (current_buffer
->save_length
, 0);
1681 validate_region (b
, e
)
1682 register Lisp_Object
*b
, *e
;
1684 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1685 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1687 if (XINT (*b
) > XINT (*e
))
1690 tem
= *b
; *b
= *e
; *e
= tem
;
1693 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1694 && XINT (*e
) <= ZV
))
1695 args_out_of_range (*b
, *e
);
1698 /* Advance BYTE_POS up to a character boundary
1699 and return the adjusted position. */
1702 advance_to_char_boundary (byte_pos
)
1707 if (byte_pos
== BEG
)
1708 /* Beginning of buffer is always a character boundary. */
1711 c
= FETCH_BYTE (byte_pos
);
1712 if (! CHAR_HEAD_P (c
))
1714 /* We should advance BYTE_POS only when C is a constituen of a
1715 multibyte sequence. */
1718 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1719 surely advance to the correct character boundary. If C is
1720 not, BYTE_POS was unchanged. */
1726 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1728 "Set the multibyte flag of the current buffer to FLAG.\n\
1729 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1730 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1731 The buffer contents remain unchanged as a sequence of bytes\n\
1732 but the contents viewed as characters do change.")
1736 Lisp_Object tail
, markers
;
1738 /* Do nothing if nothing actually changes. */
1739 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1742 /* It would be better to update the list,
1743 but this is good enough for now. */
1744 if (! EQ (current_buffer
->undo_list
, Qt
))
1745 current_buffer
->undo_list
= Qnil
;
1747 /* If the cached position is for this buffer, clear it out. */
1748 clear_charpos_cache (current_buffer
);
1752 /* Do this first, so it can use CHAR_TO_BYTE
1753 to calculate the old correspondences. */
1754 set_intervals_multibyte (0);
1756 current_buffer
->enable_multibyte_characters
= Qnil
;
1762 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1764 tail
= BUF_MARKERS (current_buffer
);
1765 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1767 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1768 tail
= XMARKER (tail
)->chain
;
1773 /* Be sure not to have a multibyte sequence striding over the GAP.
1774 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1775 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1777 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1778 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1780 unsigned char *p
= GPT_ADDR
- 1;
1782 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1783 if (BASE_LEADING_CODE_P (*p
))
1785 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1787 move_gap_both (new_gpt
, new_gpt
);
1791 /* Do this first, so that chars_in_text asks the right question.
1792 set_intervals_multibyte needs it too. */
1793 current_buffer
->enable_multibyte_characters
= Qt
;
1795 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1796 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1798 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1800 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1801 if (BEGV_BYTE
> GPT_BYTE
)
1802 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1804 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1806 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1807 if (ZV_BYTE
> GPT_BYTE
)
1808 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1810 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1813 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1816 if (pt_byte
> GPT_BYTE
)
1817 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1819 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1820 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1823 tail
= markers
= BUF_MARKERS (current_buffer
);
1825 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
1826 getting confused by the markers that have not yet been updated.
1827 It is also a signal that it should never create a marker. */
1828 BUF_MARKERS (current_buffer
) = Qnil
;
1830 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1832 XMARKER (tail
)->bytepos
1833 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1834 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1836 tail
= XMARKER (tail
)->chain
;
1839 /* Make sure no markers were put on the chain
1840 while the chain value was incorrect. */
1841 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
1844 BUF_MARKERS (current_buffer
) = markers
;
1846 /* Do this last, so it can calculate the new correspondences
1847 between chars and bytes. */
1848 set_intervals_multibyte (1);
1854 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1856 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1857 Most local variable bindings are eliminated so that the default values\n\
1858 become effective once more. Also, the syntax table is set from\n\
1859 `standard-syntax-table', the local keymap is set to nil,\n\
1860 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1861 This function also forces redisplay of the mode line.\n\
1863 Every function to select a new major mode starts by\n\
1864 calling this function.\n\n\
1865 As a special exception, local variables whose names have\n\
1866 a non-nil `permanent-local' property are not eliminated by this function.\n\
1868 The first thing this function does is run\n\
1869 the normal hook `change-major-mode-hook'.")
1872 register Lisp_Object alist
, sym
, tem
;
1875 if (!NILP (Vrun_hooks
))
1876 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1877 oalist
= current_buffer
->local_var_alist
;
1879 /* Make sure none of the bindings in oalist
1880 remain swapped in, in their symbols. */
1882 swap_out_buffer_local_variables (current_buffer
);
1884 /* Actually eliminate all local bindings of this buffer. */
1886 reset_buffer_local_variables (current_buffer
, 0);
1888 /* Redisplay mode lines; we are changing major mode. */
1890 update_mode_lines
++;
1892 /* Any which are supposed to be permanent,
1893 make local again, with the same values they had. */
1895 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1897 sym
= XCONS (XCONS (alist
)->car
)->car
;
1898 tem
= Fget (sym
, Qpermanent_local
);
1901 Fmake_local_variable (sym
);
1902 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1906 /* Force mode-line redisplay. Useful here because all major mode
1907 commands call this function. */
1908 update_mode_lines
++;
1913 /* Make sure no local variables remain set up with buffer B
1914 for their current values. */
1917 swap_out_buffer_local_variables (b
)
1920 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1922 XSETBUFFER (buffer
, b
);
1923 oalist
= b
->local_var_alist
;
1925 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1927 sym
= XCONS (XCONS (alist
)->car
)->car
;
1929 /* Need not do anything if some other buffer's binding is now encached. */
1930 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
1931 if (XBUFFER (tem
) == current_buffer
)
1933 /* Symbol is set up for this buffer's old local value.
1934 Set it up for the current buffer with the default value. */
1936 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
1937 /* Store the symbol's current value into the alist entry
1938 it is currently set up for. This is so that, if the
1939 local is marked permanent, and we make it local again
1940 later in Fkill_all_local_variables, we don't lose the value. */
1941 XCONS (XCONS (tem
)->car
)->cdr
1942 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
1943 /* Switch to the symbol's default-value alist entry. */
1944 XCONS (tem
)->car
= tem
;
1945 /* Mark it as current for buffer B. */
1946 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
1947 /* Store the current value into any forwarding in the symbol. */
1948 store_symval_forwarding (sym
,
1949 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
1955 /* Find all the overlays in the current buffer that contain position POS.
1956 Return the number found, and store them in a vector in *VEC_PTR.
1957 Store in *LEN_PTR the size allocated for the vector.
1958 Store in *NEXT_PTR the next position after POS where an overlay starts,
1959 or ZV if there are no more overlays.
1960 Store in *PREV_PTR the previous position before POS where an overlay ends,
1961 or BEGV if there are no previous overlays.
1962 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1964 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1965 when this function is called.
1967 If EXTEND is non-zero, we make the vector bigger if necessary.
1968 If EXTEND is zero, we never extend the vector,
1969 and we store only as many overlays as will fit.
1970 But we still return the total number of overlays. */
1973 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1976 Lisp_Object
**vec_ptr
;
1981 Lisp_Object tail
, overlay
, start
, end
, result
;
1984 Lisp_Object
*vec
= *vec_ptr
;
1987 int inhibit_storing
= 0;
1989 for (tail
= current_buffer
->overlays_before
;
1991 tail
= XCONS (tail
)->cdr
)
1993 int startpos
, endpos
;
1995 overlay
= XCONS (tail
)->car
;
1997 start
= OVERLAY_START (overlay
);
1998 end
= OVERLAY_END (overlay
);
1999 endpos
= OVERLAY_POSITION (end
);
2008 startpos
= OVERLAY_POSITION (start
);
2009 if (startpos
<= pos
)
2013 /* The supplied vector is full.
2014 Either make it bigger, or don't store any more in it. */
2017 *len_ptr
= len
*= 2;
2018 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2022 inhibit_storing
= 1;
2025 if (!inhibit_storing
)
2027 /* Keep counting overlays even if we can't return them all. */
2030 else if (startpos
< next
)
2034 for (tail
= current_buffer
->overlays_after
;
2036 tail
= XCONS (tail
)->cdr
)
2038 int startpos
, endpos
;
2040 overlay
= XCONS (tail
)->car
;
2042 start
= OVERLAY_START (overlay
);
2043 end
= OVERLAY_END (overlay
);
2044 startpos
= OVERLAY_POSITION (start
);
2047 if (startpos
< next
)
2051 endpos
= OVERLAY_POSITION (end
);
2058 *len_ptr
= len
*= 2;
2059 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2063 inhibit_storing
= 1;
2066 if (!inhibit_storing
)
2070 else if (endpos
< pos
&& endpos
> prev
)
2081 /* Find all the overlays in the current buffer that overlap the range BEG-END
2082 or are empty at BEG.
2084 Return the number found, and store them in a vector in *VEC_PTR.
2085 Store in *LEN_PTR the size allocated for the vector.
2086 Store in *NEXT_PTR the next position after POS where an overlay starts,
2087 or ZV if there are no more overlays.
2088 Store in *PREV_PTR the previous position before POS where an overlay ends,
2089 or BEGV if there are no previous overlays.
2090 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2092 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2093 when this function is called.
2095 If EXTEND is non-zero, we make the vector bigger if necessary.
2096 If EXTEND is zero, we never extend the vector,
2097 and we store only as many overlays as will fit.
2098 But we still return the total number of overlays. */
2101 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2104 Lisp_Object
**vec_ptr
;
2109 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2112 Lisp_Object
*vec
= *vec_ptr
;
2115 int inhibit_storing
= 0;
2117 for (tail
= current_buffer
->overlays_before
;
2119 tail
= XCONS (tail
)->cdr
)
2121 int startpos
, endpos
;
2123 overlay
= XCONS (tail
)->car
;
2125 ostart
= OVERLAY_START (overlay
);
2126 oend
= OVERLAY_END (overlay
);
2127 endpos
= OVERLAY_POSITION (oend
);
2134 startpos
= OVERLAY_POSITION (ostart
);
2135 /* Count an interval if it either overlaps the range
2136 or is empty at the start of the range. */
2137 if ((beg
< endpos
&& startpos
< end
)
2138 || (startpos
== endpos
&& beg
== endpos
))
2142 /* The supplied vector is full.
2143 Either make it bigger, or don't store any more in it. */
2146 *len_ptr
= len
*= 2;
2147 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2151 inhibit_storing
= 1;
2154 if (!inhibit_storing
)
2156 /* Keep counting overlays even if we can't return them all. */
2159 else if (startpos
< next
)
2163 for (tail
= current_buffer
->overlays_after
;
2165 tail
= XCONS (tail
)->cdr
)
2167 int startpos
, endpos
;
2169 overlay
= XCONS (tail
)->car
;
2171 ostart
= OVERLAY_START (overlay
);
2172 oend
= OVERLAY_END (overlay
);
2173 startpos
= OVERLAY_POSITION (ostart
);
2176 if (startpos
< next
)
2180 endpos
= OVERLAY_POSITION (oend
);
2181 /* Count an interval if it either overlaps the range
2182 or is empty at the start of the range. */
2183 if ((beg
< endpos
&& startpos
< end
)
2184 || (startpos
== endpos
&& beg
== endpos
))
2190 *len_ptr
= len
*= 2;
2191 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2195 inhibit_storing
= 1;
2198 if (!inhibit_storing
)
2202 else if (endpos
< beg
&& endpos
> prev
)
2213 /* Fast function to just test if we're at an overlay boundary. */
2215 overlay_touches_p (pos
)
2218 Lisp_Object tail
, overlay
;
2220 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2221 tail
= XCONS (tail
)->cdr
)
2225 overlay
= XCONS (tail
)->car
;
2226 if (!GC_OVERLAYP (overlay
))
2229 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2232 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2236 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2237 tail
= XCONS (tail
)->cdr
)
2241 overlay
= XCONS (tail
)->car
;
2242 if (!GC_OVERLAYP (overlay
))
2245 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2248 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2256 Lisp_Object overlay
;
2262 compare_overlays (v1
, v2
)
2263 const void *v1
, *v2
;
2265 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2266 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2267 if (s1
->priority
!= s2
->priority
)
2268 return s1
->priority
- s2
->priority
;
2269 if (s1
->beg
!= s2
->beg
)
2270 return s1
->beg
- s2
->beg
;
2271 if (s1
->end
!= s2
->end
)
2272 return s2
->end
- s1
->end
;
2276 /* Sort an array of overlays by priority. The array is modified in place.
2277 The return value is the new size; this may be smaller than the original
2278 size if some of the overlays were invalid or were window-specific. */
2280 sort_overlays (overlay_vec
, noverlays
, w
)
2281 Lisp_Object
*overlay_vec
;
2286 struct sortvec
*sortvec
;
2287 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2289 /* Put the valid and relevant overlays into sortvec. */
2291 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2294 Lisp_Object overlay
;
2296 overlay
= overlay_vec
[i
];
2297 if (OVERLAY_VALID (overlay
)
2298 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2299 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2301 /* If we're interested in a specific window, then ignore
2302 overlays that are limited to some other window. */
2307 window
= Foverlay_get (overlay
, Qwindow
);
2308 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2312 /* This overlay is good and counts: put it into sortvec. */
2313 sortvec
[j
].overlay
= overlay
;
2314 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2315 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2316 tem
= Foverlay_get (overlay
, Qpriority
);
2318 sortvec
[j
].priority
= XINT (tem
);
2320 sortvec
[j
].priority
= 0;
2326 /* Sort the overlays into the proper order: increasing priority. */
2329 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2331 for (i
= 0; i
< noverlays
; i
++)
2332 overlay_vec
[i
] = sortvec
[i
].overlay
;
2338 Lisp_Object string
, string2
;
2345 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2346 int size
; /* Allocated length of that array. */
2347 int used
; /* How much of the array is currently in use. */
2348 int bytes
; /* Total length of the strings in buf. */
2351 /* Buffers for storing information about the overlays touching a given
2352 position. These could be automatic variables in overlay_strings, but
2353 it's more efficient to hold onto the memory instead of repeatedly
2354 allocating and freeing it. */
2355 static struct sortstrlist overlay_heads
, overlay_tails
;
2356 static unsigned char *overlay_str_buf
;
2358 /* Allocated length of overlay_str_buf. */
2359 static int overlay_str_len
;
2361 /* A comparison function suitable for passing to qsort. */
2363 cmp_for_strings (as1
, as2
)
2366 struct sortstr
*s1
= (struct sortstr
*)as1
;
2367 struct sortstr
*s2
= (struct sortstr
*)as2
;
2368 if (s1
->size
!= s2
->size
)
2369 return s2
->size
- s1
->size
;
2370 if (s1
->priority
!= s2
->priority
)
2371 return s1
->priority
- s2
->priority
;
2376 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2377 struct sortstrlist
*ssl
;
2378 Lisp_Object str
, str2
, pri
;
2383 if (ssl
->used
== ssl
->size
)
2389 ssl
->buf
= ((struct sortstr
*)
2390 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2392 ssl
->buf
[ssl
->used
].string
= str
;
2393 ssl
->buf
[ssl
->used
].string2
= str2
;
2394 ssl
->buf
[ssl
->used
].size
= size
;
2395 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2398 if (NILP (current_buffer
->enable_multibyte_characters
))
2399 nbytes
= XSTRING (str
)->size
;
2400 else if (! STRING_MULTIBYTE (str
))
2401 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2402 STRING_BYTES (XSTRING (str
)));
2404 nbytes
= STRING_BYTES (XSTRING (str
));
2406 ssl
->bytes
+= nbytes
;
2410 if (NILP (current_buffer
->enable_multibyte_characters
))
2411 nbytes
= XSTRING (str2
)->size
;
2412 else if (! STRING_MULTIBYTE (str2
))
2413 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2414 STRING_BYTES (XSTRING (str2
)));
2416 nbytes
= STRING_BYTES (XSTRING (str2
));
2418 ssl
->bytes
+= nbytes
;
2422 /* Return the concatenation of the strings associated with overlays that
2423 begin or end at POS, ignoring overlays that are specific to a window
2424 other than W. The strings are concatenated in the appropriate order:
2425 shorter overlays nest inside longer ones, and higher priority inside
2426 lower. Normally all of the after-strings come first, but zero-sized
2427 overlays have their after-strings ride along with the before-strings
2428 because it would look strange to print them inside-out.
2430 Returns the string length, and stores the contents indirectly through
2431 PSTR, if that variable is non-null. The string may be overwritten by
2432 subsequent calls. */
2435 overlay_strings (pos
, w
, pstr
)
2438 unsigned char **pstr
;
2440 Lisp_Object ov
, overlay
, window
, str
;
2441 int startpos
, endpos
;
2442 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2444 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2445 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2446 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2448 overlay
= XCONS (ov
)->car
;
2449 if (!OVERLAYP (overlay
))
2452 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2453 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2456 if (endpos
!= pos
&& startpos
!= pos
)
2458 window
= Foverlay_get (overlay
, Qwindow
);
2459 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2462 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2463 record_overlay_string (&overlay_heads
, str
,
2465 ? Foverlay_get (overlay
, Qafter_string
)
2467 Foverlay_get (overlay
, Qpriority
),
2469 else if (endpos
== pos
2470 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2471 record_overlay_string (&overlay_tails
, str
, Qnil
,
2472 Foverlay_get (overlay
, Qpriority
),
2475 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2477 overlay
= XCONS (ov
)->car
;
2478 if (!OVERLAYP (overlay
))
2481 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2482 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2485 if (endpos
!= pos
&& startpos
!= pos
)
2487 window
= Foverlay_get (overlay
, Qwindow
);
2488 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2491 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2492 record_overlay_string (&overlay_heads
, str
,
2494 ? Foverlay_get (overlay
, Qafter_string
)
2496 Foverlay_get (overlay
, Qpriority
),
2498 else if (endpos
== pos
2499 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2500 record_overlay_string (&overlay_tails
, str
, Qnil
,
2501 Foverlay_get (overlay
, Qpriority
),
2504 if (overlay_tails
.used
> 1)
2505 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2507 if (overlay_heads
.used
> 1)
2508 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2510 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2515 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2517 if (total
> overlay_str_len
)
2519 overlay_str_len
= total
;
2520 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2523 p
= overlay_str_buf
;
2524 for (i
= overlay_tails
.used
; --i
>= 0;)
2527 tem
= overlay_tails
.buf
[i
].string
;
2528 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2529 STRING_BYTES (XSTRING (tem
)),
2530 STRING_MULTIBYTE (tem
), multibyte
);
2533 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2536 tem
= overlay_heads
.buf
[i
].string
;
2537 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2538 STRING_BYTES (XSTRING (tem
)),
2539 STRING_MULTIBYTE (tem
), multibyte
);
2541 tem
= overlay_heads
.buf
[i
].string2
;
2544 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2545 STRING_BYTES (XSTRING (tem
)),
2546 STRING_MULTIBYTE (tem
), multibyte
);
2550 if (p
!= overlay_str_buf
+ total
)
2553 *pstr
= overlay_str_buf
;
2559 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2562 recenter_overlay_lists (buf
, pos
)
2566 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2568 /* See if anything in overlays_before should move to overlays_after. */
2570 /* We don't strictly need prev in this loop; it should always be nil.
2571 But we use it for symmetry and in case that should cease to be true
2572 with some future change. */
2574 for (tail
= buf
->overlays_before
;
2576 prev
= tail
, tail
= next
)
2578 next
= XCONS (tail
)->cdr
;
2579 overlay
= XCONS (tail
)->car
;
2581 /* If the overlay is not valid, get rid of it. */
2582 if (!OVERLAY_VALID (overlay
))
2587 /* Splice the cons cell TAIL out of overlays_before. */
2589 XCONS (prev
)->cdr
= next
;
2591 buf
->overlays_before
= next
;
2597 beg
= OVERLAY_START (overlay
);
2598 end
= OVERLAY_END (overlay
);
2600 if (OVERLAY_POSITION (end
) > pos
)
2602 /* OVERLAY needs to be moved. */
2603 int where
= OVERLAY_POSITION (beg
);
2604 Lisp_Object other
, other_prev
;
2606 /* Splice the cons cell TAIL out of overlays_before. */
2608 XCONS (prev
)->cdr
= next
;
2610 buf
->overlays_before
= next
;
2612 /* Search thru overlays_after for where to put it. */
2614 for (other
= buf
->overlays_after
;
2616 other_prev
= other
, other
= XCONS (other
)->cdr
)
2618 Lisp_Object otherbeg
, otheroverlay
, follower
;
2621 otheroverlay
= XCONS (other
)->car
;
2622 if (! OVERLAY_VALID (otheroverlay
))
2625 otherbeg
= OVERLAY_START (otheroverlay
);
2626 if (OVERLAY_POSITION (otherbeg
) >= where
)
2630 /* Add TAIL to overlays_after before OTHER. */
2631 XCONS (tail
)->cdr
= other
;
2632 if (!NILP (other_prev
))
2633 XCONS (other_prev
)->cdr
= tail
;
2635 buf
->overlays_after
= tail
;
2639 /* We've reached the things that should stay in overlays_before.
2640 All the rest of overlays_before must end even earlier,
2645 /* See if anything in overlays_after should be in overlays_before. */
2647 for (tail
= buf
->overlays_after
;
2649 prev
= tail
, tail
= next
)
2651 next
= XCONS (tail
)->cdr
;
2652 overlay
= XCONS (tail
)->car
;
2654 /* If the overlay is not valid, get rid of it. */
2655 if (!OVERLAY_VALID (overlay
))
2660 /* Splice the cons cell TAIL out of overlays_after. */
2662 XCONS (prev
)->cdr
= next
;
2664 buf
->overlays_after
= next
;
2670 beg
= OVERLAY_START (overlay
);
2671 end
= OVERLAY_END (overlay
);
2673 /* Stop looking, when we know that nothing further
2674 can possibly end before POS. */
2675 if (OVERLAY_POSITION (beg
) > pos
)
2678 if (OVERLAY_POSITION (end
) <= pos
)
2680 /* OVERLAY needs to be moved. */
2681 int where
= OVERLAY_POSITION (end
);
2682 Lisp_Object other
, other_prev
;
2684 /* Splice the cons cell TAIL out of overlays_after. */
2686 XCONS (prev
)->cdr
= next
;
2688 buf
->overlays_after
= next
;
2690 /* Search thru overlays_before for where to put it. */
2692 for (other
= buf
->overlays_before
;
2694 other_prev
= other
, other
= XCONS (other
)->cdr
)
2696 Lisp_Object otherend
, otheroverlay
;
2699 otheroverlay
= XCONS (other
)->car
;
2700 if (! OVERLAY_VALID (otheroverlay
))
2703 otherend
= OVERLAY_END (otheroverlay
);
2704 if (OVERLAY_POSITION (otherend
) <= where
)
2708 /* Add TAIL to overlays_before before OTHER. */
2709 XCONS (tail
)->cdr
= other
;
2710 if (!NILP (other_prev
))
2711 XCONS (other_prev
)->cdr
= tail
;
2713 buf
->overlays_before
= tail
;
2718 XSETFASTINT (buf
->overlay_center
, pos
);
2722 adjust_overlays_for_insert (pos
, length
)
2726 /* After an insertion, the lists are still sorted properly,
2727 but we may need to update the value of the overlay center. */
2728 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2729 XSETFASTINT (current_buffer
->overlay_center
,
2730 XFASTINT (current_buffer
->overlay_center
) + length
);
2734 adjust_overlays_for_delete (pos
, length
)
2738 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2739 /* The deletion was to our right. No change needed; the before- and
2740 after-lists are still consistent. */
2742 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2743 /* The deletion was to our left. We need to adjust the center value
2744 to account for the change in position, but the lists are consistent
2745 given the new value. */
2746 XSETFASTINT (current_buffer
->overlay_center
,
2747 XFASTINT (current_buffer
->overlay_center
) - length
);
2749 /* We're right in the middle. There might be things on the after-list
2750 that now belong on the before-list. Recentering will move them,
2751 and also update the center point. */
2752 recenter_overlay_lists (current_buffer
, pos
);
2755 /* Fix up overlays that were garbled as a result of permuting markers
2756 in the range START through END. Any overlay with at least one
2757 endpoint in this range will need to be unlinked from the overlay
2758 list and reinserted in its proper place.
2759 Such an overlay might even have negative size at this point.
2760 If so, we'll reverse the endpoints. Can you think of anything
2761 better to do in this situation? */
2763 fix_overlays_in_range (start
, end
)
2764 register int start
, end
;
2766 Lisp_Object tem
, overlay
;
2767 Lisp_Object before_list
, after_list
;
2768 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2769 int startpos
, endpos
;
2771 /* This algorithm shifts links around instead of consing and GCing.
2772 The loop invariant is that before_list (resp. after_list) is a
2773 well-formed list except that its last element, the one that
2774 *pbefore (resp. *pafter) points to, is still uninitialized.
2775 So it's not a bug that before_list isn't initialized, although
2776 it may look strange. */
2777 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2779 overlay
= XCONS (*ptail
)->car
;
2780 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2783 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2785 || (startpos
>= start
&& startpos
< end
))
2787 /* If the overlay is backwards, fix that now. */
2788 if (startpos
> endpos
)
2791 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2793 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2795 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2797 /* Add it to the end of the wrong list. Later on,
2798 recenter_overlay_lists will move it to the right place. */
2799 if (endpos
< XINT (current_buffer
->overlay_center
))
2802 pafter
= &XCONS (*ptail
)->cdr
;
2807 pbefore
= &XCONS (*ptail
)->cdr
;
2809 *ptail
= XCONS (*ptail
)->cdr
;
2812 ptail
= &XCONS (*ptail
)->cdr
;
2814 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2816 overlay
= XCONS (*ptail
)->car
;
2817 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2818 if (startpos
>= end
)
2820 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2821 if (startpos
>= start
2822 || (endpos
>= start
&& endpos
< end
))
2824 if (startpos
> endpos
)
2827 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2829 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2831 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2833 if (endpos
< XINT (current_buffer
->overlay_center
))
2836 pafter
= &XCONS (*ptail
)->cdr
;
2841 pbefore
= &XCONS (*ptail
)->cdr
;
2843 *ptail
= XCONS (*ptail
)->cdr
;
2846 ptail
= &XCONS (*ptail
)->cdr
;
2849 /* Splice the constructed (wrong) lists into the buffer's lists,
2850 and let the recenter function make it sane again. */
2851 *pbefore
= current_buffer
->overlays_before
;
2852 current_buffer
->overlays_before
= before_list
;
2853 recenter_overlay_lists (current_buffer
,
2854 XINT (current_buffer
->overlay_center
));
2856 *pafter
= current_buffer
->overlays_after
;
2857 current_buffer
->overlays_after
= after_list
;
2858 recenter_overlay_lists (current_buffer
,
2859 XINT (current_buffer
->overlay_center
));
2862 /* We have two types of overlay: the one whose ending marker is
2863 after-insertion-marker (this is the usual case) and the one whose
2864 ending marker is before-insertion-marker. When `overlays_before'
2865 contains overlays of the latter type and the former type in this
2866 order and both overlays end at inserting position, inserting a text
2867 increases only the ending marker of the latter type, which results
2868 in incorrect ordering of `overlays_before'.
2870 This function fixes ordering of overlays in the slot
2871 `overlays_before' of the buffer *BP. Before the insertion, `point'
2872 was at PREV, and now is at POS. */
2875 fix_overlays_before (bp
, prev
, pos
)
2879 Lisp_Object
*tailp
= &bp
->overlays_before
;
2880 Lisp_Object
*right_place
;
2883 /* After the insertion, the several overlays may be in incorrect
2884 order. The possibility is that, in the list `overlays_before',
2885 an overlay which ends at POS appears after an overlay which ends
2886 at PREV. Since POS is greater than PREV, we must fix the
2887 ordering of these overlays, by moving overlays ends at POS before
2888 the overlays ends at PREV. */
2890 /* At first, find a place where disordered overlays should be linked
2891 in. It is where an overlay which end before POS exists. (i.e. an
2892 overlay whose ending marker is after-insertion-marker if disorder
2894 while (!NILP (*tailp
)
2895 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2897 tailp
= &XCONS (*tailp
)->cdr
;
2899 /* If we don't find such an overlay,
2900 or the found one ends before PREV,
2901 or the found one is the last one in the list,
2902 we don't have to fix anything. */
2905 || NILP (XCONS (*tailp
)->cdr
))
2908 right_place
= tailp
;
2909 tailp
= &XCONS (*tailp
)->cdr
;
2911 /* Now, end position of overlays in the list *TAILP should be before
2912 or equal to PREV. In the loop, an overlay which ends at POS is
2913 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2914 overlay which ends before PREV, the remaining overlays are in
2916 while (!NILP (*tailp
))
2918 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2921 { /* This overlay is disordered. */
2922 Lisp_Object found
= *tailp
;
2924 /* Unlink the found overlay. */
2925 *tailp
= XCONS (found
)->cdr
;
2926 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2927 XCONS (found
)->cdr
= *right_place
;
2928 /* Link it into the right place. */
2929 *right_place
= found
;
2931 else if (end
== prev
)
2932 tailp
= &XCONS (*tailp
)->cdr
;
2933 else /* No more disordered overlay. */
2938 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2939 "Return t if OBJECT is an overlay.")
2943 return (OVERLAYP (object
) ? Qt
: Qnil
);
2946 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2947 "Create a new overlay with range BEG to END in BUFFER.\n\
2948 If omitted, BUFFER defaults to the current buffer.\n\
2949 BEG and END may be integers or markers.\n\
2950 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2951 front delimiter advance when text is inserted there.\n\
2952 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2953 rear delimiter advance when text is inserted there.")
2954 (beg
, end
, buffer
, front_advance
, rear_advance
)
2955 Lisp_Object beg
, end
, buffer
;
2956 Lisp_Object front_advance
, rear_advance
;
2958 Lisp_Object overlay
;
2962 XSETBUFFER (buffer
, current_buffer
);
2964 CHECK_BUFFER (buffer
, 2);
2966 && ! EQ (Fmarker_buffer (beg
), buffer
))
2967 error ("Marker points into wrong buffer");
2969 && ! EQ (Fmarker_buffer (end
), buffer
))
2970 error ("Marker points into wrong buffer");
2972 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2973 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2975 if (XINT (beg
) > XINT (end
))
2978 temp
= beg
; beg
= end
; end
= temp
;
2981 b
= XBUFFER (buffer
);
2983 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2984 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2986 if (!NILP (front_advance
))
2987 XMARKER (beg
)->insertion_type
= 1;
2988 if (!NILP (rear_advance
))
2989 XMARKER (end
)->insertion_type
= 1;
2991 overlay
= allocate_misc ();
2992 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2993 XOVERLAY (overlay
)->start
= beg
;
2994 XOVERLAY (overlay
)->end
= end
;
2995 XOVERLAY (overlay
)->plist
= Qnil
;
2997 /* Put the new overlay on the wrong list. */
2998 end
= OVERLAY_END (overlay
);
2999 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3000 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3002 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3004 /* This puts it in the right list, and in the right order. */
3005 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3007 /* We don't need to redisplay the region covered by the overlay, because
3008 the overlay has no properties at the moment. */
3013 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3016 modify_overlay (buf
, start
, end
)
3026 start
= end
; end
= temp
;
3029 /* If this is a buffer not in the selected window,
3030 we must do other windows. */
3031 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3032 windows_or_buffers_changed
= 1;
3033 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
3034 else if (buf
!= current_buffer
)
3035 windows_or_buffers_changed
= 1;
3036 /* If multiple windows show this buffer, we must do other windows. */
3037 else if (buffer_shared
> 1)
3038 windows_or_buffers_changed
= 1;
3041 if (unchanged_modified
== MODIFF
3042 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
3044 beg_unchanged
= start
- BEG
;
3045 end_unchanged
= Z
- end
;
3049 if (Z
- end
< end_unchanged
)
3050 end_unchanged
= Z
- end
;
3051 if (start
- BEG
< beg_unchanged
)
3052 beg_unchanged
= start
- BEG
;
3056 ++BUF_OVERLAY_MODIFF (buf
);
3060 Lisp_Object
Fdelete_overlay ();
3062 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3063 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3064 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3065 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3067 (overlay
, beg
, end
, buffer
)
3068 Lisp_Object overlay
, beg
, end
, buffer
;
3070 struct buffer
*b
, *ob
;
3071 Lisp_Object obuffer
;
3072 int count
= specpdl_ptr
- specpdl
;
3074 CHECK_OVERLAY (overlay
, 0);
3076 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3078 XSETBUFFER (buffer
, current_buffer
);
3079 CHECK_BUFFER (buffer
, 3);
3082 && ! EQ (Fmarker_buffer (beg
), buffer
))
3083 error ("Marker points into wrong buffer");
3085 && ! EQ (Fmarker_buffer (end
), buffer
))
3086 error ("Marker points into wrong buffer");
3088 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3089 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3091 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3092 return Fdelete_overlay (overlay
);
3094 if (XINT (beg
) > XINT (end
))
3097 temp
= beg
; beg
= end
; end
= temp
;
3100 specbind (Qinhibit_quit
, Qt
);
3102 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3103 b
= XBUFFER (buffer
);
3104 ob
= XBUFFER (obuffer
);
3106 /* If the overlay has changed buffers, do a thorough redisplay. */
3107 if (!EQ (buffer
, obuffer
))
3109 /* Redisplay where the overlay was. */
3110 if (!NILP (obuffer
))
3115 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3116 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3118 modify_overlay (ob
, o_beg
, o_end
);
3121 /* Redisplay where the overlay is going to be. */
3122 modify_overlay (b
, XINT (beg
), XINT (end
));
3125 /* Redisplay the area the overlay has just left, or just enclosed. */
3128 int change_beg
, change_end
;
3130 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3131 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3133 if (o_beg
== XINT (beg
))
3134 modify_overlay (b
, o_end
, XINT (end
));
3135 else if (o_end
== XINT (end
))
3136 modify_overlay (b
, o_beg
, XINT (beg
));
3139 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3140 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3141 modify_overlay (b
, o_beg
, o_end
);
3145 if (!NILP (obuffer
))
3147 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3148 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3151 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3152 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3154 /* Put the overlay on the wrong list. */
3155 end
= OVERLAY_END (overlay
);
3156 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3157 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3159 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3161 /* This puts it in the right list, and in the right order. */
3162 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3164 return unbind_to (count
, overlay
);
3167 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3168 "Delete the overlay OVERLAY from its buffer.")
3170 Lisp_Object overlay
;
3174 int count
= specpdl_ptr
- specpdl
;
3176 CHECK_OVERLAY (overlay
, 0);
3178 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3182 b
= XBUFFER (buffer
);
3184 specbind (Qinhibit_quit
, Qt
);
3186 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3187 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3190 marker_position (OVERLAY_START (overlay
)),
3191 marker_position (OVERLAY_END (overlay
)));
3193 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3194 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3196 return unbind_to (count
, Qnil
);
3199 /* Overlay dissection functions. */
3201 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3202 "Return the position at which OVERLAY starts.")
3204 Lisp_Object overlay
;
3206 CHECK_OVERLAY (overlay
, 0);
3208 return (Fmarker_position (OVERLAY_START (overlay
)));
3211 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3212 "Return the position at which OVERLAY ends.")
3214 Lisp_Object overlay
;
3216 CHECK_OVERLAY (overlay
, 0);
3218 return (Fmarker_position (OVERLAY_END (overlay
)));
3221 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3222 "Return the buffer OVERLAY belongs to.")
3224 Lisp_Object overlay
;
3226 CHECK_OVERLAY (overlay
, 0);
3228 return Fmarker_buffer (OVERLAY_START (overlay
));
3231 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3232 "Return a list of the properties on OVERLAY.\n\
3233 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3236 Lisp_Object overlay
;
3238 CHECK_OVERLAY (overlay
, 0);
3240 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3244 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3245 "Return a list of the overlays that contain position POS.")
3250 Lisp_Object
*overlay_vec
;
3254 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3257 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3259 /* Put all the overlays we want in a vector in overlay_vec.
3260 Store the length in len. */
3261 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3262 (int *) 0, (int *) 0);
3264 /* Make a list of them all. */
3265 result
= Flist (noverlays
, overlay_vec
);
3267 xfree (overlay_vec
);
3271 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3272 "Return a list of the overlays that overlap the region BEG ... END.\n\
3273 Overlap means that at least one character is contained within the overlay\n\
3274 and also contained within the specified region.\n\
3275 Empty overlays are included in the result if they are located at BEG\n\
3276 or between BEG and END.")
3278 Lisp_Object beg
, end
;
3281 Lisp_Object
*overlay_vec
;
3285 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3286 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3289 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3291 /* Put all the overlays we want in a vector in overlay_vec.
3292 Store the length in len. */
3293 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3294 (int *) 0, (int *) 0);
3296 /* Make a list of them all. */
3297 result
= Flist (noverlays
, overlay_vec
);
3299 xfree (overlay_vec
);
3303 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3305 "Return the next position after POS where an overlay starts or ends.\n\
3306 If there are no more overlay boundaries after POS, return (point-max).")
3312 Lisp_Object
*overlay_vec
;
3316 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3319 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3321 /* Put all the overlays we want in a vector in overlay_vec.
3322 Store the length in len.
3323 endpos gets the position where the next overlay starts. */
3324 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3325 &endpos
, (int *) 0);
3327 /* If any of these overlays ends before endpos,
3328 use its ending point instead. */
3329 for (i
= 0; i
< noverlays
; i
++)
3334 oend
= OVERLAY_END (overlay_vec
[i
]);
3335 oendpos
= OVERLAY_POSITION (oend
);
3336 if (oendpos
< endpos
)
3340 xfree (overlay_vec
);
3341 return make_number (endpos
);
3344 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3345 Sprevious_overlay_change
, 1, 1, 0,
3346 "Return the previous position before POS where an overlay starts or ends.\n\
3347 If there are no more overlay boundaries before POS, return (point-min).")
3353 Lisp_Object
*overlay_vec
;
3358 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3361 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3363 /* At beginning of buffer, we know the answer;
3364 avoid bug subtracting 1 below. */
3365 if (XINT (pos
) == BEGV
)
3368 /* Put all the overlays we want in a vector in overlay_vec.
3369 Store the length in len.
3370 prevpos gets the position of an overlay end. */
3371 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3372 (int *) 0, &prevpos
);
3374 /* If any of these overlays starts after prevpos,
3375 maybe use its starting point instead. */
3376 for (i
= 0; i
< noverlays
; i
++)
3381 ostart
= OVERLAY_START (overlay_vec
[i
]);
3382 ostartpos
= OVERLAY_POSITION (ostart
);
3383 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3384 prevpos
= ostartpos
;
3387 /* If any overlay ends at pos, consider its starting point too. */
3388 for (tail
= current_buffer
->overlays_before
;
3390 tail
= XCONS (tail
)->cdr
)
3392 Lisp_Object overlay
, ostart
;
3395 overlay
= XCONS (tail
)->car
;
3397 ostart
= OVERLAY_START (overlay
);
3398 ostartpos
= OVERLAY_POSITION (ostart
);
3399 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
3400 prevpos
= ostartpos
;
3403 xfree (overlay_vec
);
3404 return make_number (prevpos
);
3407 /* These functions are for debugging overlays. */
3409 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3410 "Return a pair of lists giving all the overlays of the current buffer.\n\
3411 The car has all the overlays before the overlay center;\n\
3412 the cdr has all the overlays after the overlay center.\n\
3413 Recentering overlays moves overlays between these lists.\n\
3414 The lists you get are copies, so that changing them has no effect.\n\
3415 However, the overlays you get are the real objects that the buffer uses.")
3418 Lisp_Object before
, after
;
3419 before
= current_buffer
->overlays_before
;
3421 before
= Fcopy_sequence (before
);
3422 after
= current_buffer
->overlays_after
;
3424 after
= Fcopy_sequence (after
);
3426 return Fcons (before
, after
);
3429 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3430 "Recenter the overlays of the current buffer around position POS.")
3434 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3436 recenter_overlay_lists (current_buffer
, XINT (pos
));
3440 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3441 "Get the property of overlay OVERLAY with property name PROP.")
3443 Lisp_Object overlay
, prop
;
3445 Lisp_Object plist
, fallback
;
3447 CHECK_OVERLAY (overlay
, 0);
3451 for (plist
= XOVERLAY (overlay
)->plist
;
3452 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3453 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3455 if (EQ (XCONS (plist
)->car
, prop
))
3456 return XCONS (XCONS (plist
)->cdr
)->car
;
3457 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3460 tem
= Fcar (Fcdr (plist
));
3462 fallback
= Fget (tem
, prop
);
3469 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3470 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3471 (overlay
, prop
, value
)
3472 Lisp_Object overlay
, prop
, value
;
3474 Lisp_Object tail
, buffer
;
3477 CHECK_OVERLAY (overlay
, 0);
3479 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3481 for (tail
= XOVERLAY (overlay
)->plist
;
3482 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3483 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3484 if (EQ (XCONS (tail
)->car
, prop
))
3486 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3487 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3490 /* It wasn't in the list, so add it to the front. */
3491 changed
= !NILP (value
);
3492 XOVERLAY (overlay
)->plist
3493 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3495 if (! NILP (buffer
))
3498 modify_overlay (XBUFFER (buffer
),
3499 marker_position (OVERLAY_START (overlay
)),
3500 marker_position (OVERLAY_END (overlay
)));
3501 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3502 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3503 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3504 Fdelete_overlay (overlay
);
3509 /* Subroutine of report_overlay_modification. */
3511 /* Lisp vector holding overlay hook functions to call.
3512 Vector elements come in pairs.
3513 Each even-index element is a list of hook functions.
3514 The following odd-index element is the overlay they came from.
3516 Before the buffer change, we fill in this vector
3517 as we call overlay hook functions.
3518 After the buffer change, we get the functions to call from this vector.
3519 This way we always call the same functions before and after the change. */
3520 static Lisp_Object last_overlay_modification_hooks
;
3522 /* Number of elements actually used in last_overlay_modification_hooks. */
3523 static int last_overlay_modification_hooks_used
;
3525 /* Add one functionlist/overlay pair
3526 to the end of last_overlay_modification_hooks. */
3529 add_overlay_mod_hooklist (functionlist
, overlay
)
3530 Lisp_Object functionlist
, overlay
;
3532 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3534 if (last_overlay_modification_hooks_used
== oldsize
)
3537 old
= last_overlay_modification_hooks
;
3538 last_overlay_modification_hooks
3539 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3540 bcopy (XVECTOR (old
)->contents
,
3541 XVECTOR (last_overlay_modification_hooks
)->contents
,
3542 sizeof (Lisp_Object
) * oldsize
);
3544 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3545 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3548 /* Run the modification-hooks of overlays that include
3549 any part of the text in START to END.
3550 If this change is an insertion, also
3551 run the insert-before-hooks of overlay starting at END,
3552 and the insert-after-hooks of overlay ending at START.
3554 This is called both before and after the modification.
3555 AFTER is nonzero when we call after the modification.
3557 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3558 When AFTER is nonzero, they are the start position,
3559 the position after the inserted new text,
3560 and the length of deleted or replaced old text. */
3563 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3564 Lisp_Object start
, end
;
3566 Lisp_Object arg1
, arg2
, arg3
;
3568 Lisp_Object prop
, overlay
, tail
;
3569 /* 1 if this change is an insertion. */
3570 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3572 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3576 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3580 /* Call the functions recorded in last_overlay_modification_hooks
3581 rather than scanning the overlays again.
3582 First copy the vector contents, in case some of these hooks
3583 do subsequent modification of the buffer. */
3584 int size
= last_overlay_modification_hooks_used
;
3585 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3588 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3589 copy
, size
* sizeof (Lisp_Object
));
3591 gcpro1
.nvars
= size
;
3593 for (i
= 0; i
< size
;)
3595 Lisp_Object prop
, overlay
;
3597 overlay
= copy
[i
++];
3598 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3604 /* We are being called before a change.
3605 Scan the overlays to find the functions to call. */
3606 last_overlay_modification_hooks_used
= 0;
3608 for (tail
= current_buffer
->overlays_before
;
3610 tail
= XCONS (tail
)->cdr
)
3612 int startpos
, endpos
;
3613 Lisp_Object ostart
, oend
;
3615 overlay
= XCONS (tail
)->car
;
3617 ostart
= OVERLAY_START (overlay
);
3618 oend
= OVERLAY_END (overlay
);
3619 endpos
= OVERLAY_POSITION (oend
);
3620 if (XFASTINT (start
) > endpos
)
3622 startpos
= OVERLAY_POSITION (ostart
);
3623 if (insertion
&& (XFASTINT (start
) == startpos
3624 || XFASTINT (end
) == startpos
))
3626 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3629 /* Copy TAIL in case the hook recenters the overlay lists. */
3631 tail
= Fcopy_sequence (tail
);
3633 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3636 if (insertion
&& (XFASTINT (start
) == endpos
3637 || XFASTINT (end
) == endpos
))
3639 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3643 tail
= Fcopy_sequence (tail
);
3645 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3648 /* Test for intersecting intervals. This does the right thing
3649 for both insertion and deletion. */
3650 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3652 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3656 tail
= Fcopy_sequence (tail
);
3658 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3664 for (tail
= current_buffer
->overlays_after
;
3666 tail
= XCONS (tail
)->cdr
)
3668 int startpos
, endpos
;
3669 Lisp_Object ostart
, oend
;
3671 overlay
= XCONS (tail
)->car
;
3673 ostart
= OVERLAY_START (overlay
);
3674 oend
= OVERLAY_END (overlay
);
3675 startpos
= OVERLAY_POSITION (ostart
);
3676 endpos
= OVERLAY_POSITION (oend
);
3677 if (XFASTINT (end
) < startpos
)
3679 if (insertion
&& (XFASTINT (start
) == startpos
3680 || XFASTINT (end
) == startpos
))
3682 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3686 tail
= Fcopy_sequence (tail
);
3688 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3691 if (insertion
&& (XFASTINT (start
) == endpos
3692 || XFASTINT (end
) == endpos
))
3694 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3698 tail
= Fcopy_sequence (tail
);
3700 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3703 /* Test for intersecting intervals. This does the right thing
3704 for both insertion and deletion. */
3705 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3707 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3711 tail
= Fcopy_sequence (tail
);
3713 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3722 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3723 Lisp_Object list
, overlay
;
3725 Lisp_Object arg1
, arg2
, arg3
;
3727 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3729 GCPRO4 (list
, arg1
, arg2
, arg3
);
3731 add_overlay_mod_hooklist (list
, overlay
);
3733 while (!NILP (list
))
3736 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3738 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3744 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3747 evaporate_overlays (pos
)
3750 Lisp_Object tail
, overlay
, hit_list
;
3753 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3754 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3755 tail
= XCONS (tail
)->cdr
)
3758 overlay
= XCONS (tail
)->car
;
3759 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3762 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3763 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3764 hit_list
= Fcons (overlay
, hit_list
);
3767 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3768 tail
= XCONS (tail
)->cdr
)
3771 overlay
= XCONS (tail
)->car
;
3772 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3775 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3776 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3777 hit_list
= Fcons (overlay
, hit_list
);
3779 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3780 Fdelete_overlay (XCONS (hit_list
)->car
);
3783 /* Somebody has tried to store a value with an unacceptable type
3784 in the slot with offset OFFSET. */
3787 buffer_slot_type_mismatch (offset
)
3792 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3793 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3795 case Lisp_Int
: type_name
= "integers"; break;
3796 case Lisp_String
: type_name
= "strings"; break;
3797 case Lisp_Symbol
: type_name
= "symbols"; break;
3803 error ("Only %s should be stored in the buffer-local variable %s",
3804 type_name
, XSYMBOL (sym
)->name
->data
);
3810 register Lisp_Object tem
;
3812 buffer_permanent_local_flags
= 0;
3814 /* Make sure all markable slots in buffer_defaults
3815 are initialized reasonably, so mark_buffer won't choke. */
3816 reset_buffer (&buffer_defaults
);
3817 reset_buffer_local_variables (&buffer_defaults
, 1);
3818 reset_buffer (&buffer_local_symbols
);
3819 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3820 /* Prevent GC from getting confused. */
3821 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3822 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3823 #ifdef USE_TEXT_PROPERTIES
3824 BUF_INTERVALS (&buffer_defaults
) = 0;
3825 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3827 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3828 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3830 /* Set up the default values of various buffer slots. */
3831 /* Must do these before making the first buffer! */
3833 /* real setup is done in loaddefs.el */
3834 buffer_defaults
.mode_line_format
= build_string ("%-");
3835 buffer_defaults
.abbrev_mode
= Qnil
;
3836 buffer_defaults
.overwrite_mode
= Qnil
;
3837 buffer_defaults
.case_fold_search
= Qt
;
3838 buffer_defaults
.auto_fill_function
= Qnil
;
3839 buffer_defaults
.selective_display
= Qnil
;
3841 buffer_defaults
.selective_display_ellipses
= Qt
;
3843 buffer_defaults
.abbrev_table
= Qnil
;
3844 buffer_defaults
.display_table
= Qnil
;
3845 buffer_defaults
.undo_list
= Qnil
;
3846 buffer_defaults
.mark_active
= Qnil
;
3847 buffer_defaults
.file_format
= Qnil
;
3848 buffer_defaults
.overlays_before
= Qnil
;
3849 buffer_defaults
.overlays_after
= Qnil
;
3850 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3852 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3853 buffer_defaults
.truncate_lines
= Qnil
;
3854 buffer_defaults
.ctl_arrow
= Qt
;
3855 buffer_defaults
.direction_reversed
= Qnil
;
3858 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3860 buffer_defaults
.enable_multibyte_characters
= Qt
;
3861 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3862 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3863 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3864 buffer_defaults
.cache_long_line_scans
= Qnil
;
3865 buffer_defaults
.file_truename
= Qnil
;
3866 XSETFASTINT (buffer_defaults
.display_count
, 0);
3867 buffer_defaults
.display_time
= Qnil
;
3869 /* Assign the local-flags to the slots that have default values.
3870 The local flag is a bit that is used in the buffer
3871 to say that it has its own local value for the slot.
3872 The local flag bits are in the local_var_flags slot of the buffer. */
3874 /* Nothing can work if this isn't true */
3875 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3877 /* 0 means not a lisp var, -1 means always local, else mask */
3878 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3879 XSETINT (buffer_local_flags
.filename
, -1);
3880 XSETINT (buffer_local_flags
.directory
, -1);
3881 XSETINT (buffer_local_flags
.backed_up
, -1);
3882 XSETINT (buffer_local_flags
.save_length
, -1);
3883 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3884 XSETINT (buffer_local_flags
.read_only
, -1);
3885 XSETINT (buffer_local_flags
.major_mode
, -1);
3886 XSETINT (buffer_local_flags
.mode_name
, -1);
3887 XSETINT (buffer_local_flags
.undo_list
, -1);
3888 XSETINT (buffer_local_flags
.mark_active
, -1);
3889 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3890 XSETINT (buffer_local_flags
.file_truename
, -1);
3891 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3892 XSETINT (buffer_local_flags
.file_format
, -1);
3893 XSETINT (buffer_local_flags
.display_count
, -1);
3894 XSETINT (buffer_local_flags
.display_time
, -1);
3895 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3897 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3898 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3899 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3900 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3901 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3902 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3904 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3906 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3907 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3908 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3909 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3910 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3911 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3912 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3914 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3915 /* Make this one a permanent local. */
3916 buffer_permanent_local_flags
|= 0x4000;
3918 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3919 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3920 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3921 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3922 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3923 /* Make this one a permanent local. */
3924 buffer_permanent_local_flags
|= 0x80000;
3926 Vbuffer_alist
= Qnil
;
3930 QSFundamental
= build_string ("Fundamental");
3932 Qfundamental_mode
= intern ("fundamental-mode");
3933 buffer_defaults
.major_mode
= Qfundamental_mode
;
3935 Qmode_class
= intern ("mode-class");
3937 Qprotected_field
= intern ("protected-field");
3939 Qpermanent_local
= intern ("permanent-local");
3941 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3943 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3945 /* super-magic invisible buffer */
3946 Vbuffer_alist
= Qnil
;
3948 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3950 inhibit_modification_hooks
= 0;
3956 char buf
[MAXPATHLEN
+1];
3958 struct stat dotstat
, pwdstat
;
3962 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3963 if (NILP (buffer_defaults
.enable_multibyte_characters
))
3964 Fset_buffer_multibyte (Qnil
);
3966 /* If PWD is accurate, use it instead of calling getwd. This is faster
3967 when PWD is right, and may avoid a fatal error. */
3968 if ((pwd
= getenv ("PWD")) != 0
3969 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
3970 && stat (pwd
, &pwdstat
) == 0
3971 && stat (".", &dotstat
) == 0
3972 && dotstat
.st_ino
== pwdstat
.st_ino
3973 && dotstat
.st_dev
== pwdstat
.st_dev
3974 && strlen (pwd
) < MAXPATHLEN
)
3977 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
3978 fatal ("`getcwd' failed: %s\n", strerror (errno
));
3980 else if (getwd (buf
) == 0)
3981 fatal ("`getwd' failed: %s\n", buf
);
3985 /* Maybe this should really use some standard subroutine
3986 whose definition is filename syntax dependent. */
3988 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3990 buf
[rc
] = DIRECTORY_SEP
;
3993 #endif /* not VMS */
3995 current_buffer
->directory
= build_string (buf
);
3997 /* Add /: to the front of the name
3998 if it would otherwise be treated as magic. */
3999 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4001 /* If the default dir is just /, TEMP is non-nil
4002 because of the ange-ftp completion handler.
4003 However, it is not necessary to turn / into /:/.
4004 So avoid doing that. */
4005 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4006 current_buffer
->directory
4007 = concat2 (build_string ("/:"), current_buffer
->directory
);
4009 temp
= get_minibuffer (0);
4010 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4013 /* initialize the buffer routines */
4017 extern Lisp_Object Qdisabled
;
4019 staticpro (&last_overlay_modification_hooks
);
4020 last_overlay_modification_hooks
4021 = Fmake_vector (make_number (10), Qnil
);
4023 staticpro (&Vbuffer_defaults
);
4024 staticpro (&Vbuffer_local_symbols
);
4025 staticpro (&Qfundamental_mode
);
4026 staticpro (&Qmode_class
);
4027 staticpro (&QSFundamental
);
4028 staticpro (&Vbuffer_alist
);
4029 staticpro (&Qprotected_field
);
4030 staticpro (&Qpermanent_local
);
4031 staticpro (&Qkill_buffer_hook
);
4032 Qoverlayp
= intern ("overlayp");
4033 staticpro (&Qoverlayp
);
4034 Qevaporate
= intern ("evaporate");
4035 staticpro (&Qevaporate
);
4036 Qmodification_hooks
= intern ("modification-hooks");
4037 staticpro (&Qmodification_hooks
);
4038 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4039 staticpro (&Qinsert_in_front_hooks
);
4040 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4041 staticpro (&Qinsert_behind_hooks
);
4042 Qget_file_buffer
= intern ("get-file-buffer");
4043 staticpro (&Qget_file_buffer
);
4044 Qpriority
= intern ("priority");
4045 staticpro (&Qpriority
);
4046 Qwindow
= intern ("window");
4047 staticpro (&Qwindow
);
4048 Qbefore_string
= intern ("before-string");
4049 staticpro (&Qbefore_string
);
4050 Qafter_string
= intern ("after-string");
4051 staticpro (&Qafter_string
);
4052 Qfirst_change_hook
= intern ("first-change-hook");
4053 staticpro (&Qfirst_change_hook
);
4054 Qbefore_change_functions
= intern ("before-change-functions");
4055 staticpro (&Qbefore_change_functions
);
4056 Qafter_change_functions
= intern ("after-change-functions");
4057 staticpro (&Qafter_change_functions
);
4059 Fput (Qprotected_field
, Qerror_conditions
,
4060 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4061 Fput (Qprotected_field
, Qerror_message
,
4062 build_string ("Attempt to modify a protected field"));
4064 /* All these use DEFVAR_LISP_NOPRO because the slots in
4065 buffer_defaults will all be marked via Vbuffer_defaults. */
4067 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4068 &buffer_defaults
.mode_line_format
,
4069 "Default value of `mode-line-format' for buffers that don't override it.\n\
4070 This is the same as (default-value 'mode-line-format).");
4072 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4073 &buffer_defaults
.abbrev_mode
,
4074 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4075 This is the same as (default-value 'abbrev-mode).");
4077 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4078 &buffer_defaults
.ctl_arrow
,
4079 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4080 This is the same as (default-value 'ctl-arrow).");
4082 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4083 &buffer_defaults
.direction_reversed
,
4084 "Default value of `direction_reversed' for buffers that do not override it.\n\
4085 This is the same as (default-value 'direction-reversed).");
4087 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4088 &buffer_defaults
.enable_multibyte_characters
,
4089 "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4090 This is the same as (default-value 'enable-multibyte-characters).");
4092 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4093 &buffer_defaults
.buffer_file_coding_system
,
4094 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4095 This is the same as (default-value 'buffer-file-coding-system).");
4097 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4098 &buffer_defaults
.truncate_lines
,
4099 "Default value of `truncate-lines' for buffers that do not override it.\n\
4100 This is the same as (default-value 'truncate-lines).");
4102 DEFVAR_LISP_NOPRO ("default-fill-column",
4103 &buffer_defaults
.fill_column
,
4104 "Default value of `fill-column' for buffers that do not override it.\n\
4105 This is the same as (default-value 'fill-column).");
4107 DEFVAR_LISP_NOPRO ("default-left-margin",
4108 &buffer_defaults
.left_margin
,
4109 "Default value of `left-margin' for buffers that do not override it.\n\
4110 This is the same as (default-value 'left-margin).");
4112 DEFVAR_LISP_NOPRO ("default-tab-width",
4113 &buffer_defaults
.tab_width
,
4114 "Default value of `tab-width' for buffers that do not override it.\n\
4115 This is the same as (default-value 'tab-width).");
4117 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4118 &buffer_defaults
.case_fold_search
,
4119 "Default value of `case-fold-search' for buffers that don't override it.\n\
4120 This is the same as (default-value 'case-fold-search).");
4123 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4124 &buffer_defaults
.buffer_file_type
,
4125 "Default file type for buffers that do not override it.\n\
4126 This is the same as (default-value 'buffer-file-type).\n\
4127 The file type is nil for text, t for binary.");
4130 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4133 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4134 But make-docfile finds it!
4135 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4137 "Template for displaying mode line for current buffer.\n\
4138 Each buffer has its own value of this variable.\n\
4139 Value may be a string, a symbol or a list or cons cell.\n\
4140 For a symbol, its value is used (but it is ignored if t or nil).\n\
4141 A string appearing directly as the value of a symbol is processed verbatim\n\
4142 in that the %-constructs below are not recognized.\n\
4143 For a list whose car is a symbol, the symbol's value is taken,\n\
4144 and if that is non-nil, the cadr of the list is processed recursively.\n\
4145 Otherwise, the caddr of the list (if there is one) is processed.\n\
4146 For a list whose car is a string or list, each element is processed\n\
4147 recursively and the results are effectively concatenated.\n\
4148 For a list whose car is an integer, the cdr of the list is processed\n\
4149 and padded (if the number is positive) or truncated (if negative)\n\
4150 to the width specified by that number.\n\
4151 A string is printed verbatim in the mode line except for %-constructs:\n\
4152 (%-constructs are allowed when the string is the entire mode-line-format\n\
4153 or when it is found in a cons-cell or a list)\n\
4154 %b -- print buffer name. %f -- print visited file name.\n\
4155 %F -- print frame name.\n\
4156 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4157 % means buffer is read-only and * means it is modified.\n\
4158 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4159 %s -- print process status. %l -- print the current line number.\n\
4160 %c -- print the current column number (this makes editing slower).\n\
4161 To make the column number update correctly in all cases,\n\
4162 `column-number-mode' must be non-nil.\n\
4163 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4164 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4165 or print Bottom or All.\n\
4166 %n -- print Narrow if appropriate.\n\
4167 %t -- print T if file is text, B if binary.\n\
4168 %[ -- print one [ for each recursive editing level. %] similar.\n\
4169 %% -- print %. %- -- print infinitely many dashes.\n\
4170 Decimal digits after the % specify field width to which to pad.");
4173 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4174 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4175 nil here means use current buffer's major mode.");
4177 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4178 make_number (Lisp_Symbol
),
4179 "Symbol for current buffer's major mode.");
4181 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4182 make_number (Lisp_String
),
4183 "Pretty name of current buffer's major mode (a string).");
4185 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4186 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4187 Automatically becomes buffer-local when set in any fashion.");
4189 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4191 "*Non-nil if searches should ignore case.\n\
4192 Automatically becomes buffer-local when set in any fashion.");
4194 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4195 make_number (Lisp_Int
),
4196 "*Column beyond which automatic line-wrapping should happen.\n\
4197 Automatically becomes buffer-local when set in any fashion.");
4199 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4200 make_number (Lisp_Int
),
4201 "*Column for the default indent-line-function to indent to.\n\
4202 Linefeed indents to this column in Fundamental mode.\n\
4203 Automatically becomes buffer-local when set in any fashion.");
4205 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4206 make_number (Lisp_Int
),
4207 "*Distance between tab stops (for display of tab characters), in columns.\n\
4208 Automatically becomes buffer-local when set in any fashion.");
4210 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4211 "*Non-nil means display control chars with uparrow.\n\
4212 A value of nil means use backslash and octal digits.\n\
4213 Automatically becomes buffer-local when set in any fashion.\n\
4214 This variable does not apply to characters whose display is specified\n\
4215 in the current display table (if there is one).");
4217 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4218 ¤t_buffer
->enable_multibyte_characters
,
4220 "*Non-nil means the buffer contents are regarded as multi-byte characters.\n\
4221 Otherwise they are regarded as unibyte. This affects the display,\n\
4222 file I/O and the behavior of various editing commands.");
4224 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4225 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4226 "Coding system to be used for encoding the buffer contents on saving.\n\
4227 If it is nil, the buffer is saved without any code conversion unless\n\
4228 some coding system is specified in `file-coding-system-alist'\n\
4229 for the buffer file.\n\
4231 This variable is never applied to a way of decoding\n\
4232 a file while reading it.");
4234 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4236 "*Non-nil means lines in the buffer are displayed right to left.");
4238 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4239 "*Non-nil means do not display continuation lines;\n\
4240 give each line of text one screen line.\n\
4241 Automatically becomes buffer-local when set in any fashion.\n\
4243 Note that this is overridden by the variable\n\
4244 `truncate-partial-width-windows' if that variable is non-nil\n\
4245 and this buffer is not full-frame width.");
4248 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4250 "Non-nil if the visited file is a binary file.\n\
4251 This variable is meaningful on MS-DOG and Windows NT.\n\
4252 On those systems, it is automatically local in every buffer.\n\
4253 On other systems, this variable is normally always nil.");
4256 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4257 make_number (Lisp_String
),
4258 "Name of default directory of current buffer. Should end with slash.\n\
4259 Each buffer has its own value of this variable.");
4261 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4263 "Function called (if non-nil) to perform auto-fill.\n\
4264 It is called after self-inserting a space or newline.\n\
4265 Each buffer has its own value of this variable.\n\
4266 NOTE: This variable is not a hook;\n\
4267 its value may not be a list of functions.");
4269 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4270 make_number (Lisp_String
),
4271 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4272 Each buffer has its own value of this variable.");
4274 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4275 make_number (Lisp_String
),
4276 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4277 The truename of a file is calculated by `file-truename'\n\
4278 and then abbreviated with `abbreviate-file-name'.\n\
4279 Each buffer has its own value of this variable.");
4281 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4282 ¤t_buffer
->auto_save_file_name
,
4283 make_number (Lisp_String
),
4284 "Name of file for auto-saving current buffer,\n\
4285 or nil if buffer should not be auto-saved.\n\
4286 Each buffer has its own value of this variable.");
4288 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4289 "Non-nil if this buffer is read-only.\n\
4290 Each buffer has its own value of this variable.");
4292 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4293 "Non-nil if this buffer's file has been backed up.\n\
4294 Backing up is done before the first time the file is saved.\n\
4295 Each buffer has its own value of this variable.");
4297 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4298 make_number (Lisp_Int
),
4299 "Length of current buffer when last read in, saved or auto-saved.\n\
4301 Each buffer has its own value of this variable.");
4303 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4305 "Non-nil enables selective display:\n\
4306 Integer N as value means display only lines\n\
4307 that start with less than n columns of space.\n\
4308 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4309 Then ^M's in the file are written into files as newlines.\n\n\
4310 Automatically becomes buffer-local when set in any fashion.");
4313 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4314 ¤t_buffer
->selective_display_ellipses
,
4316 "t means display ... on previous line when a line is invisible.\n\
4317 Automatically becomes buffer-local when set in any fashion.");
4320 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4321 "Non-nil if self-insertion should replace existing text.\n\
4322 The value should be one of `overwrite-mode-textual',\n\
4323 `overwrite-mode-binary', or nil.\n\
4324 If it is `overwrite-mode-textual', self-insertion still\n\
4325 inserts at the end of a line, and inserts when point is before a tab,\n\
4326 until the tab is filled in.\n\
4327 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4328 Automatically becomes buffer-local when set in any fashion.");
4330 #if 0 /* The doc string is too long for some compilers,
4331 but make-docfile can find it in this comment. */
4332 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4334 "Display table that controls display of the contents of current buffer.\n\
4335 Automatically becomes buffer-local when set in any fashion.\n\
4336 The display table is a char-table created with `make-display-table'.\n\
4337 The ordinary char-table elements control how to display each possible text\n\
4338 character. Each value should be a vector of characters or nil;\n\
4339 nil means display the character in the default fashion.\n\
4340 There are six extra slots to control the display of\n\
4341 the end of a truncated screen line (extra-slot 0, a single character);\n\
4342 the end of a continued line (extra-slot 1, a single character);\n\
4343 the escape character used to display character codes in octal\n\
4344 (extra-slot 2, a single character);\n\
4345 the character used as an arrow for control characters (extra-slot 3,\n\
4346 a single character);\n\
4347 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4348 a vector of characters);\n\
4349 the character used to draw the border between side-by-side windows\n\
4350 (extra-slot 5, a single character).\n\
4351 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4352 If this variable is nil, the value of `standard-display-table' is used.\n\
4353 Each window can have its own, overriding display table.");
4355 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4358 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4361 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4362 "If non-nil, a function to call before each text change (obsolete).\n\
4363 Two arguments are passed to the function: the positions of\n\
4364 the beginning and end of the range of old text to be changed.\n\
4365 \(For an insertion, the beginning and end are at the same place.)\n\
4366 No information is given about the length of the text after the change.\n\
4368 Buffer changes made while executing the `before-change-function'\n\
4369 don't call any before-change or after-change functions.\n\
4370 That's because these variables are temporarily set to nil.\n\
4371 As a result, a hook function cannot straightforwardly alter the value of\n\
4372 these variables. See the Emacs Lisp manual for a way of\n\
4373 accomplishing an equivalent result by using other variables.\n\n\
4374 This variable is obsolete; use `before-change-functions' instead.");
4375 Vbefore_change_function
= Qnil
;
4377 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4378 "If non-nil, a Function to call after each text change (obsolete).\n\
4379 Three arguments are passed to the function: the positions of\n\
4380 the beginning and end of the range of changed text,\n\
4381 and the length of the pre-change text replaced by that range.\n\
4382 \(For an insertion, the pre-change length is zero;\n\
4383 for a deletion, that length is the number of bytes deleted,\n\
4384 and the post-change beginning and end are at the same place.)\n\
4386 Buffer changes made while executing the `after-change-function'\n\
4387 don't call any before-change or after-change functions.\n\
4388 That's because these variables are temporarily set to nil.\n\
4389 As a result, a hook function cannot straightforwardly alter the value of\n\
4390 these variables. See the Emacs Lisp manual for a way of\n\
4391 accomplishing an equivalent result by using other variables.\n\n\
4392 This variable is obsolete; use `after-change-functions' instead.");
4393 Vafter_change_function
= Qnil
;
4395 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4396 "List of functions to call before each text change.\n\
4397 Two arguments are passed to each function: the positions of\n\
4398 the beginning and end of the range of old text to be changed.\n\
4399 \(For an insertion, the beginning and end are at the same place.)\n\
4400 No information is given about the length of the text after the change.\n\
4402 Buffer changes made while executing the `before-change-functions'\n\
4403 don't call any before-change or after-change functions.\n\
4404 That's because these variables are temporarily set to nil.\n\
4405 As a result, a hook function cannot straightforwardly alter the value of\n\
4406 these variables. See the Emacs Lisp manual for a way of\n\
4407 accomplishing an equivalent result by using other variables.");
4408 Vbefore_change_functions
= Qnil
;
4410 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4411 "List of function to call after each text change.\n\
4412 Three arguments are passed to each function: the positions of\n\
4413 the beginning and end of the range of changed text,\n\
4414 and the length in bytes of the pre-change text replaced by that range.\n\
4415 \(For an insertion, the pre-change length is zero;\n\
4416 for a deletion, that length is the number of bytes deleted,\n\
4417 and the post-change beginning and end are at the same place.)\n\
4419 Buffer changes made while executing the `after-change-functions'\n\
4420 don't call any before-change or after-change functions.\n\
4421 That's because these variables are temporarily set to nil.\n\
4422 As a result, a hook function cannot straightforwardly alter the value of\n\
4423 these variables. See the Emacs Lisp manual for a way of\n\
4424 accomplishing an equivalent result by using other variables.");
4426 Vafter_change_functions
= Qnil
;
4428 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4429 "A list of functions to call before changing a buffer which is unmodified.\n\
4430 The functions are run using the `run-hooks' function.");
4431 Vfirst_change_hook
= Qnil
;
4433 #if 0 /* The doc string is too long for some compilers,
4434 but make-docfile can find it in this comment. */
4435 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4436 "List of undo entries in current buffer.\n\
4437 This variable is always local in all buffers.\n\
4438 Recent changes come first; older changes follow newer.\n\
4440 An entry (BEG . END) represents an insertion which begins at\n\
4441 position BEG and ends at position END.\n\
4443 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4444 from (abs POSITION). If POSITION is positive, point was at the front\n\
4445 of the text being deleted; if negative, point was at the end.\n\
4447 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4448 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4449 of the visited file's modification time, as of that time. If the\n\
4450 modification time of the most recent save is different, this entry is\n\
4453 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4454 was modified between BEG and END. PROPERTY is the property name,\n\
4455 and VALUE is the old value.\n\
4457 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4458 was adjusted in position by the offset DISTANCE (an integer).\n\
4460 An entry of the form POSITION indicates that point was at the buffer\n\
4461 location given by the integer. Undoing an entry of this form places\n\
4462 point at POSITION.\n\
4464 nil marks undo boundaries. The undo command treats the changes\n\
4465 between two undo boundaries as a single step to be undone.\n\
4467 If the value of the variable is t, undo information is not recorded.");
4469 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4472 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4473 "Non-nil means the mark and region are currently active in this buffer.\n\
4474 Automatically local in all buffers.");
4476 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4477 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4478 This variable is buffer-local, in all buffers.\n\
4480 Normally, the line-motion functions work by scanning the buffer for\n\
4481 newlines. Columnar operations (like move-to-column and\n\
4482 compute-motion) also work by scanning the buffer, summing character\n\
4483 widths as they go. This works well for ordinary text, but if the\n\
4484 buffer's lines are very long (say, more than 500 characters), these\n\
4485 motion functions will take longer to execute. Emacs may also take\n\
4486 longer to update the display.\n\
4488 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4489 results of their scans, and consult the cache to avoid rescanning\n\
4490 regions of the buffer until the text is modified. The caches are most\n\
4491 beneficial when they prevent the most searching---that is, when the\n\
4492 buffer contains long lines and large regions of characters with the\n\
4493 same, fixed screen width.\n\
4495 When cache-long-line-scans is non-nil, processing short lines will\n\
4496 become slightly slower (because of the overhead of consulting the\n\
4497 cache), and the caches will use memory roughly proportional to the\n\
4498 number of newlines and characters whose screen width varies.\n\
4500 The caches require no explicit maintenance; their accuracy is\n\
4501 maintained internally by the Emacs primitives. Enabling or disabling\n\
4502 the cache should not affect the behavior of any of the motion\n\
4503 functions; it should only affect their performance.");
4505 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4506 "Value of point before the last series of scroll operations, or nil.\n\
4507 This variable is always local in all buffers.");
4509 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4510 "List of formats to use when saving this buffer.\n\
4511 This variable is always local in all buffers.\n\
4512 Formats are defined by `format-alist'. This variable is\n\
4513 set when a file is visited. Automatically local in all buffers.");
4515 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4516 ¤t_buffer
->invisibility_spec
, Qnil
,
4517 "Invisibility spec of this buffer.\n\
4518 This variable is always local in all buffers.\n\
4519 The default is t, which means that text is invisible\n\
4520 if it has a non-nil `invisible' property.\n\
4521 If the value is a list, a text character is invisible if its `invisible'\n\
4522 property is an element in that list.\n\
4523 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4524 then characters with property value PROP are invisible,\n\
4525 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4527 DEFVAR_PER_BUFFER ("buffer-display-count",
4528 ¤t_buffer
->display_count
, Qnil
,
4529 "A number incremented each time this buffer is displayed in a window.\n\
4530 This variable is always local in all buffers.\n\
4531 The function `set-window-buffer increments it.");
4533 DEFVAR_PER_BUFFER ("buffer-display-time",
4534 ¤t_buffer
->display_time
, Qnil
,
4535 "Time stamp updated each time this buffer is displayed in a window.\n\
4536 This variable is always local in all buffers.\n\
4537 The function `set-window-buffer' updates this variable\n\
4538 to the value obtained by calling `current-time'.\n\
4539 If the buffer has never been shown in a window, the value is nil.");
4541 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4542 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4543 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4544 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4545 all windows or just the selected window.");
4546 Vtransient_mark_mode
= Qnil
;
4548 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4549 "*Non-nil means disregard read-only status of buffers or characters.\n\
4550 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4551 text properties. If the value is a list, disregard `buffer-read-only'\n\
4552 and disregard a `read-only' text property if the property value\n\
4553 is a member of the list.");
4554 Vinhibit_read_only
= Qnil
;
4556 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4557 "List of functions called with no args to query before killing a buffer.");
4558 Vkill_buffer_query_functions
= Qnil
;
4560 defsubr (&Sbuffer_live_p
);
4561 defsubr (&Sbuffer_list
);
4562 defsubr (&Sget_buffer
);
4563 defsubr (&Sget_file_buffer
);
4564 defsubr (&Sget_buffer_create
);
4565 defsubr (&Smake_indirect_buffer
);
4566 defsubr (&Sgenerate_new_buffer_name
);
4567 defsubr (&Sbuffer_name
);
4568 /*defsubr (&Sbuffer_number);*/
4569 defsubr (&Sbuffer_file_name
);
4570 defsubr (&Sbuffer_base_buffer
);
4571 defsubr (&Sbuffer_local_variables
);
4572 defsubr (&Sbuffer_modified_p
);
4573 defsubr (&Sset_buffer_modified_p
);
4574 defsubr (&Sbuffer_modified_tick
);
4575 defsubr (&Srename_buffer
);
4576 defsubr (&Sother_buffer
);
4577 defsubr (&Sbuffer_disable_undo
);
4578 defsubr (&Sbuffer_enable_undo
);
4579 defsubr (&Skill_buffer
);
4580 defsubr (&Sset_buffer_major_mode
);
4581 defsubr (&Sswitch_to_buffer
);
4582 defsubr (&Spop_to_buffer
);
4583 defsubr (&Scurrent_buffer
);
4584 defsubr (&Sset_buffer
);
4585 defsubr (&Sbarf_if_buffer_read_only
);
4586 defsubr (&Sbury_buffer
);
4587 defsubr (&Serase_buffer
);
4588 defsubr (&Sset_buffer_multibyte
);
4589 defsubr (&Skill_all_local_variables
);
4591 defsubr (&Soverlayp
);
4592 defsubr (&Smake_overlay
);
4593 defsubr (&Sdelete_overlay
);
4594 defsubr (&Smove_overlay
);
4595 defsubr (&Soverlay_start
);
4596 defsubr (&Soverlay_end
);
4597 defsubr (&Soverlay_buffer
);
4598 defsubr (&Soverlay_properties
);
4599 defsubr (&Soverlays_at
);
4600 defsubr (&Soverlays_in
);
4601 defsubr (&Snext_overlay_change
);
4602 defsubr (&Sprevious_overlay_change
);
4603 defsubr (&Soverlay_recenter
);
4604 defsubr (&Soverlay_lists
);
4605 defsubr (&Soverlay_get
);
4606 defsubr (&Soverlay_put
);
4612 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4613 initial_define_key (control_x_map
, 'k', "kill-buffer");
4615 /* This must not be in syms_of_buffer, because Qdisabled is not
4616 initialized when that function gets called. */
4617 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);