1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
24 #include <sys/param.h>
27 /* in 4.1, param.h fails to define this. */
28 #define MAXPATHLEN 1024
29 #endif /* not MAXPATHLEN */
33 #include "intervals.h"
37 #include "region-cache.h"
39 #include "blockinput.h"
41 struct buffer
*current_buffer
; /* the current buffer */
43 /* First buffer in chain of all buffers (in reverse order of creation).
44 Threaded through ->next. */
46 struct buffer
*all_buffers
;
48 /* This structure holds the default values of the buffer-local variables
49 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
50 The default value occupies the same slot in this structure
51 as an individual buffer's value occupies in that buffer.
52 Setting the default value also goes through the alist of buffers
53 and stores into each buffer that does not say it has a local value. */
55 struct buffer buffer_defaults
;
57 /* A Lisp_Object pointer to the above, used for staticpro */
59 static Lisp_Object Vbuffer_defaults
;
61 /* This structure marks which slots in a buffer have corresponding
62 default values in buffer_defaults.
63 Each such slot has a nonzero value in this structure.
64 The value has only one nonzero bit.
66 When a buffer has its own local value for a slot,
67 the bit for that slot (found in the same slot in this structure)
68 is turned on in the buffer's local_var_flags slot.
70 If a slot in this structure is -1, then even though there may
71 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
72 and the corresponding slot in buffer_defaults is not used.
74 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
75 but there is a default value which is copied into each buffer.
77 If a slot in this structure is negative, then even though there may
78 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
79 and the corresponding slot in buffer_defaults is not used.
81 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
82 zero, that is a bug */
84 struct buffer buffer_local_flags
;
86 /* This structure holds the names of symbols whose values may be
87 buffer-local. It is indexed and accessed in the same way as the above. */
89 struct buffer buffer_local_symbols
;
90 /* A Lisp_Object pointer to the above, used for staticpro */
91 static Lisp_Object Vbuffer_local_symbols
;
93 /* This structure holds the required types for the values in the
94 buffer-local slots. If a slot contains Qnil, then the
95 corresponding buffer slot may contain a value of any type. If a
96 slot contains an integer, then prospective values' tags must be
97 equal to that integer. When a tag does not match, the function
98 buffer_slot_type_mismatch will signal an error. */
99 struct buffer buffer_local_types
;
101 Lisp_Object
Fset_buffer ();
102 void set_buffer_internal ();
103 void set_buffer_internal_1 ();
104 static void call_overlay_mod_hooks ();
105 static void swap_out_buffer_local_variables ();
107 /* Alist of all buffer names vs the buffers. */
108 /* This used to be a variable, but is no longer,
109 to prevent lossage due to user rplac'ing this alist or its elements. */
110 Lisp_Object Vbuffer_alist
;
112 /* Functions to call before and after each text change. */
113 Lisp_Object Vbefore_change_function
;
114 Lisp_Object Vafter_change_function
;
115 Lisp_Object Vbefore_change_functions
;
116 Lisp_Object Vafter_change_functions
;
118 Lisp_Object Vtransient_mark_mode
;
120 /* t means ignore all read-only text properties.
121 A list means ignore such a property if its value is a member of the list.
122 Any non-nil value means ignore buffer-read-only. */
123 Lisp_Object Vinhibit_read_only
;
125 /* List of functions to call that can query about killing a buffer.
126 If any of these functions returns nil, we don't kill it. */
127 Lisp_Object Vkill_buffer_query_functions
;
129 /* List of functions to call before changing an unmodified buffer. */
130 Lisp_Object Vfirst_change_hook
;
131 Lisp_Object Qfirst_change_hook
;
133 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
135 Lisp_Object Qprotected_field
;
137 Lisp_Object QSFundamental
; /* A string "Fundamental" */
139 Lisp_Object Qkill_buffer_hook
;
141 Lisp_Object Qget_file_buffer
;
143 Lisp_Object Qoverlayp
;
145 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
147 Lisp_Object Qmodification_hooks
;
148 Lisp_Object Qinsert_in_front_hooks
;
149 Lisp_Object Qinsert_behind_hooks
;
151 /* For debugging; temporary. See set_buffer_internal. */
152 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
158 error ("No buffer named %s", XSTRING (spec
)->data
);
159 error ("Invalid buffer argument");
162 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
163 "Return a list of all existing live buffers.")
166 return Fmapcar (Qcdr
, Vbuffer_alist
);
169 /* Like Fassoc, but use Fstring_equal to compare
170 (which ignores text properties),
171 and don't ever QUIT. */
174 assoc_ignore_text_properties (key
, list
)
175 register Lisp_Object key
;
178 register Lisp_Object tail
;
179 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
181 register Lisp_Object elt
, tem
;
183 tem
= Fstring_equal (Fcar (elt
), key
);
190 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
191 "Return the buffer named NAME (a string).\n\
192 If there is no live buffer named NAME, return nil.\n\
193 NAME may also be a buffer; if so, the value is that buffer.")
195 register Lisp_Object name
;
199 CHECK_STRING (name
, 0);
201 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
204 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
205 "Return the buffer visiting file FILENAME (a string).\n\
206 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
207 If there is no such live buffer, return nil.\n\
208 See also `find-buffer-visiting'.")
210 register Lisp_Object filename
;
212 register Lisp_Object tail
, buf
, tem
;
215 CHECK_STRING (filename
, 0);
216 filename
= Fexpand_file_name (filename
, Qnil
);
218 /* If the file name has special constructs in it,
219 call the corresponding file handler. */
220 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
222 return call2 (handler
, Qget_file_buffer
, filename
);
224 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
226 buf
= Fcdr (XCONS (tail
)->car
);
227 if (!BUFFERP (buf
)) continue;
228 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
229 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
236 /* Incremented for each buffer created, to assign the buffer number. */
239 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
240 "Return the buffer named NAME, or create such a buffer and return it.\n\
241 A new buffer is created if there is no live buffer named NAME.\n\
242 If NAME starts with a space, the new buffer does not keep undo information.\n\
243 If NAME is a buffer instead of a string, then it is the value returned.\n\
244 The value is never nil.")
246 register Lisp_Object name
;
248 register Lisp_Object buf
;
249 register struct buffer
*b
;
251 buf
= Fget_buffer (name
);
255 if (XSTRING (name
)->size
== 0)
256 error ("Empty string for buffer name is not allowed");
258 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
260 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
262 /* An ordinary buffer uses its own struct buffer_text. */
263 b
->text
= &b
->own_text
;
266 BUF_GAP_SIZE (b
) = 20;
268 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
270 if (! BUF_BEG_ADDR (b
))
271 buffer_memory_full ();
279 BUF_SAVE_MODIFF (b
) = 1;
280 BUF_INTERVALS (b
) = 0;
282 b
->newline_cache
= 0;
283 b
->width_run_cache
= 0;
284 b
->width_table
= Qnil
;
286 /* Put this on the chain of all buffers including killed ones. */
287 b
->next
= all_buffers
;
290 /* An ordinary buffer normally doesn't need markers
291 to handle BEGV and ZV. */
293 b
->begv_marker
= Qnil
;
296 name
= Fcopy_sequence (name
);
297 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
300 if (XSTRING (name
)->data
[0] != ' ')
306 reset_buffer_local_variables (b
);
308 /* Put this in the alist of all live buffers. */
310 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
312 b
->mark
= Fmake_marker ();
313 BUF_MARKERS (b
) = Qnil
;
318 DEFUN ("make-indirect-buffer",
319 Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
320 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
321 "Create and return an indirect buffer for buffer BASE, named NAME.\n\
322 BASE should be an existing buffer (or buffer name).\n\
323 NAME should be a string which is not the name of an existing buffer.")
325 register Lisp_Object base_buffer
, name
;
327 register Lisp_Object buf
;
328 register struct buffer
*b
;
330 buf
= Fget_buffer (name
);
332 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
334 base_buffer
= Fget_buffer (base_buffer
);
335 if (NILP (base_buffer
))
336 error ("No such buffer: `%s'",
337 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
339 if (XSTRING (name
)->size
== 0)
340 error ("Empty string for buffer name is not allowed");
342 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
344 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
346 if (XBUFFER (base_buffer
)->base_buffer
)
347 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
349 b
->base_buffer
= XBUFFER (base_buffer
);
351 /* Use the base buffer's text object. */
352 b
->text
= b
->base_buffer
->text
;
354 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
355 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
356 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
358 b
->newline_cache
= 0;
359 b
->width_run_cache
= 0;
360 b
->width_table
= Qnil
;
362 /* Put this on the chain of all buffers including killed ones. */
363 b
->next
= all_buffers
;
366 name
= Fcopy_sequence (name
);
367 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
371 reset_buffer_local_variables (b
);
373 /* Put this in the alist of all live buffers. */
375 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
377 b
->mark
= Fmake_marker ();
380 /* Make sure the base buffer has markers for its narrowing. */
381 if (NILP (b
->base_buffer
->pt_marker
))
383 b
->base_buffer
->pt_marker
= Fmake_marker ();
384 Fset_marker (b
->base_buffer
->pt_marker
,
385 make_number (BUF_PT (b
->base_buffer
)), base_buffer
);
387 if (NILP (b
->base_buffer
->begv_marker
))
389 b
->base_buffer
->begv_marker
= Fmake_marker ();
390 Fset_marker (b
->base_buffer
->begv_marker
,
391 make_number (BUF_BEGV (b
->base_buffer
)), base_buffer
);
393 if (NILP (b
->base_buffer
->zv_marker
))
395 b
->base_buffer
->zv_marker
= Fmake_marker ();
396 Fset_marker (b
->base_buffer
->zv_marker
,
397 make_number (BUF_ZV (b
->base_buffer
)), base_buffer
);
400 /* Give the indirect buffer markers for its narrowing. */
401 b
->pt_marker
= Fpoint_marker ();
402 b
->begv_marker
= Fpoint_min_marker ();
403 b
->zv_marker
= Fpoint_max_marker ();
408 /* Reinitialize everything about a buffer except its name and contents
409 and local variables. */
413 register struct buffer
*b
;
416 b
->file_truename
= Qnil
;
417 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
419 XSETFASTINT (b
->save_length
, 0);
420 b
->last_window_start
= 1;
422 b
->auto_save_modified
= 0;
423 b
->auto_save_failure_time
= -1;
424 b
->auto_save_file_name
= Qnil
;
426 b
->overlays_before
= Qnil
;
427 b
->overlays_after
= Qnil
;
428 XSETFASTINT (b
->overlay_center
, 1);
429 b
->mark_active
= Qnil
;
430 b
->point_before_scroll
= Qnil
;
431 b
->file_format
= Qnil
;
434 /* Reset buffer B's local variables info.
435 Don't use this on a buffer that has already been in use;
436 it does not treat permanent locals consistently.
437 Instead, use Fkill_all_local_variables. */
439 reset_buffer_local_variables (b
)
440 register struct buffer
*b
;
444 /* Reset the major mode to Fundamental, together with all the
445 things that depend on the major mode.
446 default-major-mode is handled at a higher level.
447 We ignore it here. */
448 b
->major_mode
= Qfundamental_mode
;
450 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
451 b
->mode_name
= QSFundamental
;
452 b
->minor_modes
= Qnil
;
453 b
->downcase_table
= Vascii_downcase_table
;
454 b
->upcase_table
= Vascii_upcase_table
;
455 b
->case_canon_table
= Vascii_canon_table
;
456 b
->case_eqv_table
= Vascii_eqv_table
;
457 b
->buffer_file_type
= Qnil
;
458 b
->invisibility_spec
= Qt
;
461 b
->sort_table
= XSTRING (Vascii_sort_table
);
462 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
465 /* Reset all per-buffer variables to their defaults. */
466 b
->local_var_alist
= Qnil
;
467 b
->local_var_flags
= 0;
469 /* For each slot that has a default value,
470 copy that into the slot. */
472 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
473 offset
< sizeof (struct buffer
);
474 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
476 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
477 if (flag
> 0 || flag
== -2)
478 *(Lisp_Object
*)(offset
+ (char *)b
) =
479 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
483 /* We split this away from generate-new-buffer, because rename-buffer
484 and set-visited-file-name ought to be able to use this to really
485 rename the buffer properly. */
487 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
489 "Return a string that is the name of no existing buffer based on NAME.\n\
490 If there is no live buffer named NAME, then return NAME.\n\
491 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
492 until an unused name is found, and then return that name.\n\
493 Optional second argument IGNORE specifies a name that is okay to use\n\
494 \(if it is in the sequence to be tried)\n\
495 even if a buffer with that name exists.")
497 register Lisp_Object name
, ignore
;
499 register Lisp_Object gentemp
, tem
;
503 CHECK_STRING (name
, 0);
505 tem
= Fget_buffer (name
);
512 sprintf (number
, "<%d>", ++count
);
513 gentemp
= concat2 (name
, build_string (number
));
514 tem
= Fstring_equal (gentemp
, ignore
);
517 tem
= Fget_buffer (gentemp
);
524 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
525 "Return the name of BUFFER, as a string.\n\
526 With no argument or nil as argument, return the name of the current buffer.")
528 register Lisp_Object buffer
;
531 return current_buffer
->name
;
532 CHECK_BUFFER (buffer
, 0);
533 return XBUFFER (buffer
)->name
;
536 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
537 "Return name of file BUFFER is visiting, or nil if none.\n\
538 No argument or nil as argument means use the current buffer.")
540 register Lisp_Object buffer
;
543 return current_buffer
->filename
;
544 CHECK_BUFFER (buffer
, 0);
545 return XBUFFER (buffer
)->filename
;
548 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
550 "Return the base buffer of indirect buffer BUFFER.\n\
551 If BUFFER is not indirect, return nil.")
553 register Lisp_Object buffer
;
556 Lisp_Object base_buffer
;
559 base
= current_buffer
->base_buffer
;
562 CHECK_BUFFER (buffer
, 0);
563 base
= XBUFFER (buffer
)->base_buffer
;
568 XSETBUFFER (base_buffer
, base
);
572 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
573 Sbuffer_local_variables
, 0, 1, 0,
574 "Return an alist of variables that are buffer-local in BUFFER.\n\
575 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
576 For a symbol that is locally unbound, just the symbol appears in the value.\n\
577 Note that storing new VALUEs in these elements doesn't change the variables.\n\
578 No argument or nil as argument means use current buffer as BUFFER.")
580 register Lisp_Object buffer
;
582 register struct buffer
*buf
;
583 register Lisp_Object result
;
586 buf
= current_buffer
;
589 CHECK_BUFFER (buffer
, 0);
590 buf
= XBUFFER (buffer
);
596 register Lisp_Object tail
;
597 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
599 Lisp_Object val
, elt
;
601 elt
= XCONS (tail
)->car
;
603 /* Reference each variable in the alist in buf.
604 If inquiring about the current buffer, this gets the current values,
605 so store them into the alist so the alist is up to date.
606 If inquiring about some other buffer, this swaps out any values
607 for that buffer, making the alist up to date automatically. */
608 val
= find_symbol_value (XCONS (elt
)->car
);
609 /* Use the current buffer value only if buf is the current buffer. */
610 if (buf
!= current_buffer
)
611 val
= XCONS (elt
)->cdr
;
613 /* If symbol is unbound, put just the symbol in the list. */
614 if (EQ (val
, Qunbound
))
615 result
= Fcons (XCONS (elt
)->car
, result
);
616 /* Otherwise, put (symbol . value) in the list. */
618 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
622 /* Add on all the variables stored in special slots. */
624 register int offset
, mask
;
626 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
627 offset
< sizeof (struct buffer
);
628 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
630 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
631 if (mask
== -1 || (buf
->local_var_flags
& mask
))
632 if (SYMBOLP (*(Lisp_Object
*)(offset
633 + (char *)&buffer_local_symbols
)))
634 result
= Fcons (Fcons (*((Lisp_Object
*)
635 (offset
+ (char *)&buffer_local_symbols
)),
636 *(Lisp_Object
*)(offset
+ (char *)buf
)),
645 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
647 "Return t if BUFFER was modified since its file was last read or saved.\n\
648 No argument or nil as argument means use current buffer as BUFFER.")
650 register Lisp_Object buffer
;
652 register struct buffer
*buf
;
654 buf
= current_buffer
;
657 CHECK_BUFFER (buffer
, 0);
658 buf
= XBUFFER (buffer
);
661 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
664 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
666 "Mark current buffer as modified or unmodified according to FLAG.\n\
667 A non-nil FLAG means mark the buffer modified.")
669 register Lisp_Object flag
;
671 register int already
;
672 register Lisp_Object fn
;
674 #ifdef CLASH_DETECTION
675 /* If buffer becoming modified, lock the file.
676 If buffer becoming unmodified, unlock the file. */
678 fn
= current_buffer
->file_truename
;
681 already
= SAVE_MODIFF
< MODIFF
;
682 if (!already
&& !NILP (flag
))
684 else if (already
&& NILP (flag
))
687 #endif /* CLASH_DETECTION */
689 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
694 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
696 "Return BUFFER's tick counter, incremented for each change in text.\n\
697 Each buffer has a tick counter which is incremented each time the text in\n\
698 that buffer is changed. It wraps around occasionally.\n\
699 No argument or nil as argument means use current buffer as BUFFER.")
701 register Lisp_Object buffer
;
703 register struct buffer
*buf
;
705 buf
= current_buffer
;
708 CHECK_BUFFER (buffer
, 0);
709 buf
= XBUFFER (buffer
);
712 return make_number (BUF_MODIFF (buf
));
715 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
716 "sRename buffer (to new name): \nP",
717 "Change current buffer's name to NEWNAME (a string).\n\
718 If second arg UNIQUE is nil or omitted, it is an error if a\n\
719 buffer named NEWNAME already exists.\n\
720 If UNIQUE is non-nil, come up with a new name using\n\
721 `generate-new-buffer-name'.\n\
722 Interactively, you can set UNIQUE with a prefix argument.\n\
723 We return the name we actually gave the buffer.\n\
724 This does not change the name of the visited file (if any).")
726 register Lisp_Object newname
, unique
;
728 register Lisp_Object tem
, buf
;
730 CHECK_STRING (newname
, 0);
732 if (XSTRING (newname
)->size
== 0)
733 error ("Empty string is invalid as a buffer name");
735 tem
= Fget_buffer (newname
);
736 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
737 the buffer automatically so you can create another with the original name.
738 It makes UNIQUE equivalent to
739 (rename-buffer (generate-new-buffer-name NEWNAME)). */
740 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
741 return current_buffer
->name
;
745 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
747 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
750 current_buffer
->name
= newname
;
752 /* Catch redisplay's attention. Unless we do this, the mode lines for
753 any windows displaying current_buffer will stay unchanged. */
756 XSETBUFFER (buf
, current_buffer
);
757 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
758 if (NILP (current_buffer
->filename
)
759 && !NILP (current_buffer
->auto_save_file_name
))
760 call0 (intern ("rename-auto-save-file"));
761 /* Refetch since that last call may have done GC. */
762 return current_buffer
->name
;
765 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
766 "Return most recently selected buffer other than BUFFER.\n\
767 Buffers not visible in windows are preferred to visible buffers,\n\
768 unless optional second argument VISIBLE-OK is non-nil.\n\
769 If no other buffer exists, the buffer `*scratch*' is returned.\n\
770 If BUFFER is omitted or nil, some interesting buffer is returned.")
772 register Lisp_Object buffer
, visible_ok
;
774 register Lisp_Object tail
, buf
, notsogood
, tem
;
777 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
779 buf
= Fcdr (Fcar (tail
));
780 if (EQ (buf
, buffer
))
782 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
785 /* If the selected frame has a buffer_predicate,
786 disregard buffers that don't fit the predicate. */
787 tem
= frame_buffer_predicate ();
790 tem
= call1 (tem
, buf
);
796 if (NILP (visible_ok
))
797 tem
= Fget_buffer_window (buf
, Qt
);
802 if (NILP (notsogood
))
805 if (!NILP (notsogood
))
807 return Fget_buffer_create (build_string ("*scratch*"));
810 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
812 "Make BUFFER stop keeping undo information.\n\
813 No argument or nil as argument means do this for the current buffer.")
815 register Lisp_Object buffer
;
817 Lisp_Object real_buffer
;
820 XSETBUFFER (real_buffer
, current_buffer
);
823 real_buffer
= Fget_buffer (buffer
);
824 if (NILP (real_buffer
))
828 XBUFFER (real_buffer
)->undo_list
= Qt
;
833 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
835 "Start keeping undo information for buffer BUFFER.\n\
836 No argument or nil as argument means do this for the current buffer.")
838 register Lisp_Object buffer
;
840 Lisp_Object real_buffer
;
843 XSETBUFFER (real_buffer
, current_buffer
);
846 real_buffer
= Fget_buffer (buffer
);
847 if (NILP (real_buffer
))
851 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
852 XBUFFER (real_buffer
)->undo_list
= Qnil
;
858 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
859 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
860 The buffer being killed will be current while the hook is running.\n\
863 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
864 "Kill the buffer BUFFER.\n\
865 The argument may be a buffer or may be the name of a buffer.\n\
866 An argument of nil means kill the current buffer.\n\n\
867 Value is t if the buffer is actually killed, nil if user says no.\n\n\
868 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
869 if not void, is a list of functions to be called, with no arguments,\n\
870 before the buffer is actually killed. The buffer to be killed is current\n\
871 when the hook functions are called.\n\n\
872 Any processes that have this buffer as the `process-buffer' are killed\n\
873 with `delete-process'.")
878 register struct buffer
*b
;
879 register Lisp_Object tem
;
880 register struct Lisp_Marker
*m
;
881 struct gcpro gcpro1
, gcpro2
;
884 buf
= Fcurrent_buffer ();
886 buf
= Fget_buffer (bufname
);
892 /* Avoid trouble for buffer already dead. */
896 /* Query if the buffer is still modified. */
897 if (INTERACTIVE
&& !NILP (b
->filename
)
898 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
900 GCPRO2 (buf
, bufname
);
901 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
902 XSTRING (b
->name
)->data
));
908 /* Run hooks with the buffer to be killed the current buffer. */
910 register Lisp_Object val
;
911 int count
= specpdl_ptr
- specpdl
;
914 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
915 set_buffer_internal (b
);
917 /* First run the query functions; if any query is answered no,
918 don't kill the buffer. */
919 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
921 tem
= call0 (Fcar (list
));
923 return unbind_to (count
, Qnil
);
926 /* Then run the hooks. */
927 if (!NILP (Vrun_hooks
))
928 call1 (Vrun_hooks
, Qkill_buffer_hook
);
929 unbind_to (count
, Qnil
);
932 /* We have no more questions to ask. Verify that it is valid
933 to kill the buffer. This must be done after the questions
934 since anything can happen within do_yes_or_no_p. */
936 /* Don't kill the minibuffer now current. */
937 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
943 /* When we kill a base buffer, kill all its indirect buffers.
944 We do it at this stage so nothing terrible happens if they
945 ask questions or their hooks get errors. */
946 if (! b
->base_buffer
)
948 struct buffer
*other
;
952 for (other
= all_buffers
; other
; other
= other
->next
)
953 /* all_buffers contains dead buffers too;
954 don't re-kill them. */
955 if (other
->base_buffer
== b
&& !NILP (other
->name
))
958 XSETBUFFER (buf
, other
);
965 /* Make this buffer not be current.
966 In the process, notice if this is the sole visible buffer
967 and give up if so. */
968 if (b
== current_buffer
)
970 tem
= Fother_buffer (buf
, Qnil
);
972 if (b
== current_buffer
)
976 /* Now there is no question: we can kill the buffer. */
978 #ifdef CLASH_DETECTION
979 /* Unlock this buffer's file, if it is locked. */
981 #endif /* CLASH_DETECTION */
983 kill_buffer_processes (buf
);
987 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
988 Freplace_buffer_in_windows (buf
);
991 /* Delete any auto-save file, if we saved it in this session. */
992 if (STRINGP (b
->auto_save_file_name
)
993 && b
->auto_save_modified
!= 0)
996 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
998 internal_delete_file (b
->auto_save_file_name
);
1003 /* Unchain all markers that belong to this indirect buffer.
1004 Don't unchain the markers that belong to the base buffer
1005 or its other indirect buffers. */
1006 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1012 unchain_marker (tem
);
1018 /* Unchain all markers of this buffer and its indirect buffers.
1019 and leave them pointing nowhere. */
1020 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1027 BUF_MARKERS (b
) = Qnil
;
1029 #ifdef USE_TEXT_PROPERTIES
1030 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1033 /* Perhaps we should explicitly free the interval tree here... */
1036 /* Reset the local variables, so that this buffer's local values
1037 won't be protected from GC. They would be protected
1038 if they happened to remain encached in their symbols.
1039 This gets rid of them for certain. */
1040 swap_out_buffer_local_variables (b
);
1041 reset_buffer_local_variables (b
);
1046 if (! b
->base_buffer
)
1047 BUFFER_FREE (BUF_BEG_ADDR (b
));
1049 if (b
->newline_cache
)
1051 free_region_cache (b
->newline_cache
);
1052 b
->newline_cache
= 0;
1054 if (b
->width_run_cache
)
1056 free_region_cache (b
->width_run_cache
);
1057 b
->width_run_cache
= 0;
1059 b
->width_table
= Qnil
;
1061 b
->undo_list
= Qnil
;
1066 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1067 we do this each time BUF is selected visibly, the more recently
1068 selected buffers are always closer to the front of the list. This
1069 means that other_buffer is more likely to choose a relevant buffer. */
1074 register Lisp_Object link
, prev
;
1077 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1079 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1084 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1085 we cannot use Fdelq itself here because it allows quitting. */
1088 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1090 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1092 XCONS(link
)->cdr
= Vbuffer_alist
;
1093 Vbuffer_alist
= link
;
1096 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1097 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1098 Use this function before selecting the buffer, since it may need to inspect\n\
1099 the current buffer's major mode.")
1104 Lisp_Object function
;
1106 function
= buffer_defaults
.major_mode
;
1107 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1108 function
= current_buffer
->major_mode
;
1110 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1113 count
= specpdl_ptr
- specpdl
;
1115 /* To select a nonfundamental mode,
1116 select the buffer temporarily and then call the mode function. */
1118 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1123 return unbind_to (count
, Qnil
);
1126 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1127 "Select buffer BUFFER in the current window.\n\
1128 BUFFER may be a buffer or a buffer name.\n\
1129 Optional second arg NORECORD non-nil means\n\
1130 do not put this buffer at the front of the list of recently selected ones.\n\
1132 WARNING: This is NOT the way to work on another buffer temporarily\n\
1133 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1134 the window-buffer correspondences.")
1136 Lisp_Object bufname
, norecord
;
1138 register Lisp_Object buf
;
1141 if (EQ (minibuf_window
, selected_window
))
1142 error ("Cannot switch buffers in minibuffer window");
1143 tem
= Fwindow_dedicated_p (selected_window
);
1145 error ("Cannot switch buffers in a dedicated window");
1148 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1151 buf
= Fget_buffer (bufname
);
1154 buf
= Fget_buffer_create (bufname
);
1155 Fset_buffer_major_mode (buf
);
1159 if (NILP (norecord
))
1160 record_buffer (buf
);
1162 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1163 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1170 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
1171 "Select buffer BUFFER in some window, preferably a different one.\n\
1172 If BUFFER is nil, then some other buffer is chosen.\n\
1173 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1174 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1175 window even if BUFFER is already visible in the selected window.")
1177 Lisp_Object bufname
, other
;
1179 register Lisp_Object buf
;
1181 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1184 buf
= Fget_buffer (bufname
);
1187 buf
= Fget_buffer_create (bufname
);
1188 Fset_buffer_major_mode (buf
);
1192 record_buffer (buf
);
1193 Fselect_window (Fdisplay_buffer (buf
, other
));
1197 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1198 "Return the current buffer as a Lisp object.")
1201 register Lisp_Object buf
;
1202 XSETBUFFER (buf
, current_buffer
);
1206 /* Set the current buffer to B. */
1209 set_buffer_internal (b
)
1210 register struct buffer
*b
;
1212 register struct buffer
*old_buf
;
1213 register Lisp_Object tail
, valcontents
;
1216 if (current_buffer
== b
)
1219 windows_or_buffers_changed
= 1;
1220 set_buffer_internal_1 (b
);
1223 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1224 This is used by redisplay. */
1227 set_buffer_internal_1 (b
)
1228 register struct buffer
*b
;
1230 register struct buffer
*old_buf
;
1231 register Lisp_Object tail
, valcontents
;
1234 if (current_buffer
== b
)
1237 old_buf
= current_buffer
;
1239 last_known_column_point
= -1; /* invalidate indentation cache */
1243 /* Put the undo list back in the base buffer, so that it appears
1244 that an indirect buffer shares the undo list of its base. */
1245 if (old_buf
->base_buffer
)
1246 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1248 /* If the old current buffer has markers to record PT, BEGV and ZV
1249 when it is not current, update them now. */
1250 if (! NILP (old_buf
->pt_marker
))
1253 XSETBUFFER (obuf
, old_buf
);
1254 Fset_marker (old_buf
->pt_marker
, BUF_PT (old_buf
), obuf
);
1256 if (! NILP (old_buf
->begv_marker
))
1259 XSETBUFFER (obuf
, old_buf
);
1260 Fset_marker (old_buf
->begv_marker
, BUF_BEGV (old_buf
), obuf
);
1262 if (! NILP (old_buf
->zv_marker
))
1265 XSETBUFFER (obuf
, old_buf
);
1266 Fset_marker (old_buf
->zv_marker
, BUF_ZV (old_buf
), obuf
);
1270 /* Get the undo list from the base buffer, so that it appears
1271 that an indirect buffer shares the undo list of its base. */
1273 b
->undo_list
= b
->base_buffer
->undo_list
;
1275 /* If the new current buffer has markers to record PT, BEGV and ZV
1276 when it is not current, fetch them now. */
1277 if (! NILP (b
->pt_marker
))
1278 BUF_PT (b
) = marker_position (b
->pt_marker
);
1279 if (! NILP (b
->begv_marker
))
1280 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1281 if (! NILP (b
->zv_marker
))
1282 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1284 /* Look down buffer's list of local Lisp variables
1285 to find and update any that forward into C variables. */
1287 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1289 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1290 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1291 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1292 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1293 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1294 /* Just reference the variable
1295 to cause it to become set for this buffer. */
1296 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1299 /* Do the same with any others that were local to the previous buffer */
1302 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1304 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1305 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1306 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1307 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1308 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1309 /* Just reference the variable
1310 to cause it to become set for this buffer. */
1311 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1315 /* Switch to buffer B temporarily for redisplay purposes.
1316 This avoids certain things that don't need to be done within redisplay. */
1322 register struct buffer
*old_buf
;
1324 if (current_buffer
== b
)
1327 old_buf
= current_buffer
;
1332 /* If the old current buffer has markers to record PT, BEGV and ZV
1333 when it is not current, update them now. */
1334 if (! NILP (old_buf
->pt_marker
))
1337 XSETBUFFER (obuf
, old_buf
);
1338 Fset_marker (old_buf
->pt_marker
, BUF_PT (old_buf
), obuf
);
1340 if (! NILP (old_buf
->begv_marker
))
1343 XSETBUFFER (obuf
, old_buf
);
1344 Fset_marker (old_buf
->begv_marker
, BUF_BEGV (old_buf
), obuf
);
1346 if (! NILP (old_buf
->zv_marker
))
1349 XSETBUFFER (obuf
, old_buf
);
1350 Fset_marker (old_buf
->zv_marker
, BUF_ZV (old_buf
), obuf
);
1354 /* If the new current buffer has markers to record PT, BEGV and ZV
1355 when it is not current, fetch them now. */
1356 if (! NILP (b
->pt_marker
))
1357 BUF_PT (b
) = marker_position (b
->pt_marker
);
1358 if (! NILP (b
->begv_marker
))
1359 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1360 if (! NILP (b
->zv_marker
))
1361 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1364 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1365 "Make the buffer BUFFER current for editing operations.\n\
1366 BUFFER may be a buffer or the name of an existing buffer.\n\
1367 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1368 This function does not display the buffer, so its effect ends\n\
1369 when the current command terminates.\n\
1370 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1372 register Lisp_Object bufname
;
1374 register Lisp_Object buffer
;
1375 buffer
= Fget_buffer (bufname
);
1378 if (NILP (XBUFFER (buffer
)->name
))
1379 error ("Selecting deleted buffer");
1380 set_buffer_internal (XBUFFER (buffer
));
1384 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1385 Sbarf_if_buffer_read_only
, 0, 0, 0,
1386 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1389 if (!NILP (current_buffer
->read_only
)
1390 && NILP (Vinhibit_read_only
))
1391 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1395 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1396 "Put BUFFER at the end of the list of all buffers.\n\
1397 There it is the least likely candidate for `other-buffer' to return;\n\
1398 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1399 If BUFFER is nil or omitted, bury the current buffer.\n\
1400 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1401 selected window if it is displayed there.")
1403 register Lisp_Object buf
;
1405 /* Figure out what buffer we're going to bury. */
1408 XSETBUFFER (buf
, current_buffer
);
1410 /* If we're burying the current buffer, unshow it. */
1411 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1417 buf1
= Fget_buffer (buf
);
1423 /* Move buf to the end of the buffer list. */
1425 register Lisp_Object aelt
, link
;
1427 aelt
= Frassq (buf
, Vbuffer_alist
);
1428 link
= Fmemq (aelt
, Vbuffer_alist
);
1429 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1430 XCONS (link
)->cdr
= Qnil
;
1431 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1437 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1438 "Delete the entire contents of the current buffer.\n\
1439 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1440 so the buffer is truly empty after this.")
1445 current_buffer
->last_window_start
= 1;
1446 /* Prevent warnings, or suspension of auto saving, that would happen
1447 if future size is less than past size. Use of erase-buffer
1448 implies that the future text is not really related to the past text. */
1449 XSETFASTINT (current_buffer
->save_length
, 0);
1453 validate_region (b
, e
)
1454 register Lisp_Object
*b
, *e
;
1456 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1457 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1459 if (XINT (*b
) > XINT (*e
))
1462 tem
= *b
; *b
= *e
; *e
= tem
;
1465 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1466 && XINT (*e
) <= ZV
))
1467 args_out_of_range (*b
, *e
);
1470 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1472 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1473 Most local variable bindings are eliminated so that the default values\n\
1474 become effective once more. Also, the syntax table is set from\n\
1475 `standard-syntax-table', the local keymap is set to nil,\n\
1476 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1477 This function also forces redisplay of the mode line.\n\
1479 Every function to select a new major mode starts by\n\
1480 calling this function.\n\n\
1481 As a special exception, local variables whose names have\n\
1482 a non-nil `permanent-local' property are not eliminated by this function.\n\
1484 The first thing this function does is run\n\
1485 the normal hook `change-major-mode-hook'.")
1488 register Lisp_Object alist
, sym
, tem
;
1491 if (!NILP (Vrun_hooks
))
1492 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1493 oalist
= current_buffer
->local_var_alist
;
1495 /* Make sure none of the bindings in oalist
1496 remain swapped in, in their symbols. */
1498 swap_out_buffer_local_variables (current_buffer
);
1500 /* Actually eliminate all local bindings of this buffer. */
1502 reset_buffer_local_variables (current_buffer
);
1504 /* Redisplay mode lines; we are changing major mode. */
1506 update_mode_lines
++;
1508 /* Any which are supposed to be permanent,
1509 make local again, with the same values they had. */
1511 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1513 sym
= XCONS (XCONS (alist
)->car
)->car
;
1514 tem
= Fget (sym
, Qpermanent_local
);
1517 Fmake_local_variable (sym
);
1518 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1522 /* Force mode-line redisplay. Useful here because all major mode
1523 commands call this function. */
1524 update_mode_lines
++;
1529 /* Make sure no local variables remain set up with buffer B
1530 for their current values. */
1533 swap_out_buffer_local_variables (b
)
1536 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1538 XSETBUFFER (buffer
, b
);
1539 oalist
= b
->local_var_alist
;
1541 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1543 sym
= XCONS (XCONS (alist
)->car
)->car
;
1545 /* Need not do anything if some other buffer's binding is now encached. */
1546 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
;
1547 if (XBUFFER (tem
) == current_buffer
)
1549 /* Symbol is set up for this buffer's old local value.
1550 Set it up for the current buffer with the default value. */
1552 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1553 /* Store the symbol's current value into the alist entry
1554 it is currently set up for. This is so that, if the
1555 local is marked permanent, and we make it local again
1556 later in Fkill_all_local_variables, we don't lose the value. */
1557 XCONS (XCONS (tem
)->car
)->cdr
1558 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
);
1559 /* Switch to the symbol's default-value alist entry. */
1560 XCONS (tem
)->car
= tem
;
1561 /* Mark it as current for buffer B. */
1562 XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
1564 /* Store the current value into any forwarding in the symbol. */
1565 store_symval_forwarding (sym
, XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
,
1571 /* Find all the overlays in the current buffer that contain position POS.
1572 Return the number found, and store them in a vector in *VEC_PTR.
1573 Store in *LEN_PTR the size allocated for the vector.
1574 Store in *NEXT_PTR the next position after POS where an overlay starts,
1575 or ZV if there are no more overlays.
1576 Store in *PREV_PTR the previous position before POS where an overlay ends,
1577 or BEGV if there are no previous overlays.
1578 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1580 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1581 when this function is called.
1583 If EXTEND is non-zero, we make the vector bigger if necessary.
1584 If EXTEND is zero, we never extend the vector,
1585 and we store only as many overlays as will fit.
1586 But we still return the total number of overlays. */
1589 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1592 Lisp_Object
**vec_ptr
;
1597 Lisp_Object tail
, overlay
, start
, end
, result
;
1600 Lisp_Object
*vec
= *vec_ptr
;
1603 int inhibit_storing
= 0;
1605 for (tail
= current_buffer
->overlays_before
;
1607 tail
= XCONS (tail
)->cdr
)
1609 int startpos
, endpos
;
1611 overlay
= XCONS (tail
)->car
;
1613 start
= OVERLAY_START (overlay
);
1614 end
= OVERLAY_END (overlay
);
1615 endpos
= OVERLAY_POSITION (end
);
1624 startpos
= OVERLAY_POSITION (start
);
1625 if (startpos
<= pos
)
1629 /* The supplied vector is full.
1630 Either make it bigger, or don't store any more in it. */
1633 *len_ptr
= len
*= 2;
1634 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1638 inhibit_storing
= 1;
1641 if (!inhibit_storing
)
1643 /* Keep counting overlays even if we can't return them all. */
1646 else if (startpos
< next
)
1650 for (tail
= current_buffer
->overlays_after
;
1652 tail
= XCONS (tail
)->cdr
)
1654 int startpos
, endpos
;
1656 overlay
= XCONS (tail
)->car
;
1658 start
= OVERLAY_START (overlay
);
1659 end
= OVERLAY_END (overlay
);
1660 startpos
= OVERLAY_POSITION (start
);
1663 if (startpos
< next
)
1667 endpos
= OVERLAY_POSITION (end
);
1674 *len_ptr
= len
*= 2;
1675 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1679 inhibit_storing
= 1;
1682 if (!inhibit_storing
)
1686 else if (endpos
< pos
&& endpos
> prev
)
1697 /* Fast function to just test if we're at an overlay boundary. */
1699 overlay_touches_p (pos
)
1702 Lisp_Object tail
, overlay
;
1704 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
1705 tail
= XCONS (tail
)->cdr
)
1709 overlay
= XCONS (tail
)->car
;
1710 if (!GC_OVERLAYP (overlay
))
1713 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1716 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
1720 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
1721 tail
= XCONS (tail
)->cdr
)
1725 overlay
= XCONS (tail
)->car
;
1726 if (!GC_OVERLAYP (overlay
))
1729 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1732 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
1740 Lisp_Object overlay
;
1746 compare_overlays (s1
, s2
)
1747 struct sortvec
*s1
, *s2
;
1749 if (s1
->priority
!= s2
->priority
)
1750 return s1
->priority
- s2
->priority
;
1751 if (s1
->beg
!= s2
->beg
)
1752 return s1
->beg
- s2
->beg
;
1753 if (s1
->end
!= s2
->end
)
1754 return s2
->end
- s1
->end
;
1758 /* Sort an array of overlays by priority. The array is modified in place.
1759 The return value is the new size; this may be smaller than the original
1760 size if some of the overlays were invalid or were window-specific. */
1762 sort_overlays (overlay_vec
, noverlays
, w
)
1763 Lisp_Object
*overlay_vec
;
1768 struct sortvec
*sortvec
;
1769 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1771 /* Put the valid and relevant overlays into sortvec. */
1773 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1776 Lisp_Object overlay
;
1778 overlay
= overlay_vec
[i
];
1779 if (OVERLAY_VALID (overlay
)
1780 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1781 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1783 /* If we're interested in a specific window, then ignore
1784 overlays that are limited to some other window. */
1789 window
= Foverlay_get (overlay
, Qwindow
);
1790 if (WINDOWP (window
) && XWINDOW (window
) != w
)
1794 /* This overlay is good and counts: put it into sortvec. */
1795 sortvec
[j
].overlay
= overlay
;
1796 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1797 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1798 tem
= Foverlay_get (overlay
, Qpriority
);
1800 sortvec
[j
].priority
= XINT (tem
);
1802 sortvec
[j
].priority
= 0;
1808 /* Sort the overlays into the proper order: increasing priority. */
1811 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1813 for (i
= 0; i
< noverlays
; i
++)
1814 overlay_vec
[i
] = sortvec
[i
].overlay
;
1825 /* A comparison function suitable for passing to qsort. */
1827 cmp_for_strings (as1
, as2
)
1830 struct sortstr
*s1
= (struct sortstr
*)as1
;
1831 struct sortstr
*s2
= (struct sortstr
*)as2
;
1832 if (s1
->size
!= s2
->size
)
1833 return s2
->size
- s1
->size
;
1834 if (s1
->priority
!= s2
->priority
)
1835 return s1
->priority
- s2
->priority
;
1839 /* Buffers for storing the overlays touching a given position.
1840 These are expanded as needed, but never freed. */
1841 static struct sortstr
*overlay_heads
, *overlay_tails
;
1842 static char *overlay_str_buf
;
1844 /* Allocated length of those buffers. */
1845 static int overlay_heads_len
, overlay_tails_len
, overlay_str_len
;
1847 /* Return the concatenation of the strings associated with overlays that
1848 begin or end at POS, ignoring overlays that are specific to a window
1849 other than W. The strings are concatenated in the appropriate order:
1850 shorter overlays nest inside longer ones, and higher priority inside
1851 lower. Returns the string length, and stores the contents indirectly
1852 through PSTR, if that variable is non-null. The string may be
1853 overwritten by subsequent calls. */
1855 overlay_strings (pos
, w
, pstr
)
1860 Lisp_Object ov
, overlay
, window
, str
, tem
;
1861 int ntail
= 0, nhead
= 0;
1863 int startpos
, endpos
;
1865 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
1867 overlay
= XCONS (ov
)->car
;
1868 if (!OVERLAYP (overlay
))
1871 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1872 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1875 if (endpos
!= pos
&& startpos
!= pos
)
1877 window
= Foverlay_get (overlay
, Qwindow
);
1878 if (WINDOWP (window
) && XWINDOW (window
) != w
)
1882 str
= Foverlay_get (overlay
, Qafter_string
);
1885 if (ntail
== overlay_tails_len
)
1887 if (! overlay_tails
)
1889 overlay_tails_len
= 5;
1890 overlay_tails
= ((struct sortstr
*)
1891 xmalloc (5 * sizeof (struct sortstr
)));
1895 overlay_tails_len
*= 2;
1896 overlay_tails
= ((struct sortstr
*)
1897 xrealloc ((overlay_tails_len
1898 * sizeof (struct sortstr
))));
1901 overlay_tails
[ntail
].string
= str
;
1902 overlay_tails
[ntail
].size
= endpos
- startpos
;
1903 tem
= Foverlay_get (overlay
, Qpriority
);
1904 overlay_tails
[ntail
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
1906 total
+= XSTRING (str
)->size
;
1909 if (startpos
== pos
)
1911 str
= Foverlay_get (overlay
, Qbefore_string
);
1914 if (nhead
== overlay_heads_len
)
1916 if (! overlay_heads
)
1918 overlay_heads_len
= 5;
1919 overlay_heads
= ((struct sortstr
*)
1920 xmalloc (5 * sizeof (struct sortstr
)));
1924 overlay_heads_len
*= 2;
1925 overlay_heads
= ((struct sortstr
*)
1926 xrealloc ((overlay_heads_len
1927 * sizeof (struct sortstr
))));
1930 overlay_heads
[nhead
].string
= str
;
1931 overlay_heads
[nhead
].size
= endpos
- startpos
;
1932 tem
= Foverlay_get (overlay
, Qpriority
);
1933 overlay_heads
[nhead
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
1935 total
+= XSTRING (str
)->size
;
1939 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
1941 overlay
= XCONS (ov
)->car
;
1942 if (!OVERLAYP (overlay
))
1945 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1946 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1951 str
= Foverlay_get (overlay
, Qafter_string
);
1954 if (ntail
== overlay_tails_len
)
1956 if (! overlay_tails
)
1958 overlay_tails_len
= 5;
1959 overlay_tails
= ((struct sortstr
*)
1960 xmalloc (5 * sizeof (struct sortstr
)));
1964 overlay_tails_len
*= 2;
1965 overlay_tails
= ((struct sortstr
*)
1966 xrealloc ((overlay_tails_len
1967 * sizeof (struct sortstr
))));
1970 overlay_tails
[ntail
].string
= str
;
1971 overlay_tails
[ntail
].size
= endpos
- startpos
;
1972 tem
= Foverlay_get (overlay
, Qpriority
);
1973 overlay_tails
[ntail
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
1975 total
+= XSTRING (str
)->size
;
1978 if (startpos
== pos
)
1980 str
= Foverlay_get (overlay
, Qbefore_string
);
1983 if (nhead
== overlay_heads_len
)
1985 if (! overlay_heads
)
1987 overlay_heads_len
= 5;
1988 overlay_heads
= ((struct sortstr
*)
1989 xmalloc (5 * sizeof (struct sortstr
)));
1993 overlay_heads_len
*= 2;
1994 overlay_heads
= ((struct sortstr
*)
1995 xrealloc ((overlay_heads_len
1996 * sizeof (struct sortstr
))));
1999 overlay_heads
[nhead
].string
= str
;
2000 overlay_heads
[nhead
].size
= endpos
- startpos
;
2001 tem
= Foverlay_get (overlay
, Qpriority
);
2002 overlay_heads
[nhead
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
2004 total
+= XSTRING (str
)->size
;
2009 qsort (overlay_tails
, ntail
, sizeof (struct sortstr
), cmp_for_strings
);
2011 qsort (overlay_heads
, nhead
, sizeof (struct sortstr
), cmp_for_strings
);
2017 if (total
> overlay_str_len
)
2019 if (! overlay_str_buf
)
2020 overlay_str_buf
= (char *)xmalloc (total
);
2022 overlay_str_buf
= (char *)xrealloc (overlay_str_buf
, total
);
2023 overlay_str_len
= total
;
2025 p
= overlay_str_buf
;
2026 for (i
= ntail
; --i
>= 0;)
2028 tem
= overlay_tails
[i
].string
;
2029 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2030 p
+= XSTRING (tem
)->size
;
2032 for (i
= 0; i
< nhead
; ++i
)
2034 tem
= overlay_heads
[i
].string
;
2035 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2036 p
+= XSTRING (tem
)->size
;
2039 *pstr
= overlay_str_buf
;
2044 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2047 recenter_overlay_lists (buf
, pos
)
2051 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2053 /* See if anything in overlays_before should move to overlays_after. */
2055 /* We don't strictly need prev in this loop; it should always be nil.
2056 But we use it for symmetry and in case that should cease to be true
2057 with some future change. */
2059 for (tail
= buf
->overlays_before
;
2061 prev
= tail
, tail
= next
)
2063 next
= XCONS (tail
)->cdr
;
2064 overlay
= XCONS (tail
)->car
;
2066 /* If the overlay is not valid, get rid of it. */
2067 if (!OVERLAY_VALID (overlay
))
2072 /* Splice the cons cell TAIL out of overlays_before. */
2074 XCONS (prev
)->cdr
= next
;
2076 buf
->overlays_before
= next
;
2082 beg
= OVERLAY_START (overlay
);
2083 end
= OVERLAY_END (overlay
);
2085 if (OVERLAY_POSITION (end
) > pos
)
2087 /* OVERLAY needs to be moved. */
2088 int where
= OVERLAY_POSITION (beg
);
2089 Lisp_Object other
, other_prev
;
2091 /* Splice the cons cell TAIL out of overlays_before. */
2093 XCONS (prev
)->cdr
= next
;
2095 buf
->overlays_before
= next
;
2097 /* Search thru overlays_after for where to put it. */
2099 for (other
= buf
->overlays_after
;
2101 other_prev
= other
, other
= XCONS (other
)->cdr
)
2103 Lisp_Object otherbeg
, otheroverlay
, follower
;
2106 otheroverlay
= XCONS (other
)->car
;
2107 if (! OVERLAY_VALID (otheroverlay
))
2110 otherbeg
= OVERLAY_START (otheroverlay
);
2111 if (OVERLAY_POSITION (otherbeg
) >= where
)
2115 /* Add TAIL to overlays_after before OTHER. */
2116 XCONS (tail
)->cdr
= other
;
2117 if (!NILP (other_prev
))
2118 XCONS (other_prev
)->cdr
= tail
;
2120 buf
->overlays_after
= tail
;
2124 /* We've reached the things that should stay in overlays_before.
2125 All the rest of overlays_before must end even earlier,
2130 /* See if anything in overlays_after should be in overlays_before. */
2132 for (tail
= buf
->overlays_after
;
2134 prev
= tail
, tail
= next
)
2136 next
= XCONS (tail
)->cdr
;
2137 overlay
= XCONS (tail
)->car
;
2139 /* If the overlay is not valid, get rid of it. */
2140 if (!OVERLAY_VALID (overlay
))
2145 /* Splice the cons cell TAIL out of overlays_after. */
2147 XCONS (prev
)->cdr
= next
;
2149 buf
->overlays_after
= next
;
2155 beg
= OVERLAY_START (overlay
);
2156 end
= OVERLAY_END (overlay
);
2158 /* Stop looking, when we know that nothing further
2159 can possibly end before POS. */
2160 if (OVERLAY_POSITION (beg
) > pos
)
2163 if (OVERLAY_POSITION (end
) <= pos
)
2165 /* OVERLAY needs to be moved. */
2166 int where
= OVERLAY_POSITION (end
);
2167 Lisp_Object other
, other_prev
;
2169 /* Splice the cons cell TAIL out of overlays_after. */
2171 XCONS (prev
)->cdr
= next
;
2173 buf
->overlays_after
= next
;
2175 /* Search thru overlays_before for where to put it. */
2177 for (other
= buf
->overlays_before
;
2179 other_prev
= other
, other
= XCONS (other
)->cdr
)
2181 Lisp_Object otherend
, otheroverlay
;
2184 otheroverlay
= XCONS (other
)->car
;
2185 if (! OVERLAY_VALID (otheroverlay
))
2188 otherend
= OVERLAY_END (otheroverlay
);
2189 if (OVERLAY_POSITION (otherend
) <= where
)
2193 /* Add TAIL to overlays_before before OTHER. */
2194 XCONS (tail
)->cdr
= other
;
2195 if (!NILP (other_prev
))
2196 XCONS (other_prev
)->cdr
= tail
;
2198 buf
->overlays_before
= tail
;
2203 XSETFASTINT (buf
->overlay_center
, pos
);
2207 adjust_overlays_for_insert (pos
, length
)
2211 /* After an insertion, the lists are still sorted properly,
2212 but we may need to update the value of the overlay center. */
2213 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2214 XSETFASTINT (current_buffer
->overlay_center
,
2215 XFASTINT (current_buffer
->overlay_center
) + length
);
2219 adjust_overlays_for_delete (pos
, length
)
2223 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2224 /* The deletion was to our right. No change needed; the before- and
2225 after-lists are still consistent. */
2227 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2228 /* The deletion was to our left. We need to adjust the center value
2229 to account for the change in position, but the lists are consistent
2230 given the new value. */
2231 XSETFASTINT (current_buffer
->overlay_center
,
2232 XFASTINT (current_buffer
->overlay_center
) - length
);
2234 /* We're right in the middle. There might be things on the after-list
2235 that now belong on the before-list. Recentering will move them,
2236 and also update the center point. */
2237 recenter_overlay_lists (current_buffer
, pos
);
2240 /* Fix up overlays that were garbled as a result of permuting markers
2241 in the range START through END. Any overlay with at least one
2242 endpoint in this range will need to be unlinked from the overlay
2243 list and reinserted in its proper place.
2244 Such an overlay might even have negative size at this point.
2245 If so, we'll reverse the endpoints. Can you think of anything
2246 better to do in this situation? */
2248 fix_overlays_in_range (start
, end
)
2249 register int start
, end
;
2251 Lisp_Object tem
, overlay
;
2252 Lisp_Object before_list
, after_list
;
2253 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2254 int startpos
, endpos
;
2256 /* This algorithm shifts links around instead of consing and GCing.
2257 The loop invariant is that before_list (resp. after_list) is a
2258 well-formed list except that its last element, the one that
2259 *pbefore (resp. *pafter) points to, is still uninitialized.
2260 So it's not a bug that before_list isn't initialized, although
2261 it may look strange. */
2262 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2264 overlay
= XCONS (*ptail
)->car
;
2265 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2268 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2270 || (startpos
>= start
&& startpos
< end
))
2272 /* If the overlay is backwards, fix that now. */
2273 if (startpos
> endpos
)
2276 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2277 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2278 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2280 /* Add it to the end of the wrong list. Later on,
2281 recenter_overlay_lists will move it to the right place. */
2282 if (endpos
< XINT (current_buffer
->overlay_center
))
2285 pafter
= &XCONS (*ptail
)->cdr
;
2290 pbefore
= &XCONS (*ptail
)->cdr
;
2292 *ptail
= XCONS (*ptail
)->cdr
;
2295 ptail
= &XCONS (*ptail
)->cdr
;
2297 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2299 overlay
= XCONS (*ptail
)->car
;
2300 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2301 if (startpos
>= end
)
2303 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2304 if (startpos
>= start
2305 || (endpos
>= start
&& endpos
< end
))
2307 if (startpos
> endpos
)
2310 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2311 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2312 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2314 if (endpos
< XINT (current_buffer
->overlay_center
))
2317 pafter
= &XCONS (*ptail
)->cdr
;
2322 pbefore
= &XCONS (*ptail
)->cdr
;
2324 *ptail
= XCONS (*ptail
)->cdr
;
2327 ptail
= &XCONS (*ptail
)->cdr
;
2330 /* Splice the constructed (wrong) lists into the buffer's lists,
2331 and let the recenter function make it sane again. */
2332 *pbefore
= current_buffer
->overlays_before
;
2333 current_buffer
->overlays_before
= before_list
;
2334 recenter_overlay_lists (current_buffer
,
2335 XINT (current_buffer
->overlay_center
));
2337 *pafter
= current_buffer
->overlays_after
;
2338 current_buffer
->overlays_after
= after_list
;
2339 recenter_overlay_lists (current_buffer
,
2340 XINT (current_buffer
->overlay_center
));
2343 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2344 "Return t if OBJECT is an overlay.")
2348 return (OVERLAYP (object
) ? Qt
: Qnil
);
2351 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
2352 "Create a new overlay with range BEG to END in BUFFER.\n\
2353 If omitted, BUFFER defaults to the current buffer.\n\
2354 BEG and END may be integers or markers.")
2356 Lisp_Object beg
, end
, buffer
;
2358 Lisp_Object overlay
;
2362 XSETBUFFER (buffer
, current_buffer
);
2364 CHECK_BUFFER (buffer
, 2);
2366 && ! EQ (Fmarker_buffer (beg
), buffer
))
2367 error ("Marker points into wrong buffer");
2369 && ! EQ (Fmarker_buffer (end
), buffer
))
2370 error ("Marker points into wrong buffer");
2372 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2373 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2375 if (XINT (beg
) > XINT (end
))
2378 temp
= beg
; beg
= end
; end
= temp
;
2381 b
= XBUFFER (buffer
);
2383 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2384 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2386 overlay
= allocate_misc ();
2387 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2388 XOVERLAY (overlay
)->start
= beg
;
2389 XOVERLAY (overlay
)->end
= end
;
2390 XOVERLAY (overlay
)->plist
= Qnil
;
2392 /* Put the new overlay on the wrong list. */
2393 end
= OVERLAY_END (overlay
);
2394 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2395 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2397 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2399 /* This puts it in the right list, and in the right order. */
2400 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2402 /* We don't need to redisplay the region covered by the overlay, because
2403 the overlay has no properties at the moment. */
2408 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
2409 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
2410 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
2411 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
2413 (overlay
, beg
, end
, buffer
)
2414 Lisp_Object overlay
, beg
, end
, buffer
;
2416 struct buffer
*b
, *ob
;
2417 Lisp_Object obuffer
;
2418 int count
= specpdl_ptr
- specpdl
;
2420 CHECK_OVERLAY (overlay
, 0);
2422 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2424 XSETBUFFER (buffer
, current_buffer
);
2425 CHECK_BUFFER (buffer
, 3);
2428 && ! EQ (Fmarker_buffer (beg
), buffer
))
2429 error ("Marker points into wrong buffer");
2431 && ! EQ (Fmarker_buffer (end
), buffer
))
2432 error ("Marker points into wrong buffer");
2434 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2435 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2437 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
2438 return Fdelete_overlay (overlay
);
2440 if (XINT (beg
) > XINT (end
))
2443 temp
= beg
; beg
= end
; end
= temp
;
2446 specbind (Qinhibit_quit
, Qt
);
2448 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2449 b
= XBUFFER (buffer
);
2450 ob
= XBUFFER (obuffer
);
2452 /* If the overlay has changed buffers, do a thorough redisplay. */
2453 if (!EQ (buffer
, obuffer
))
2455 /* Redisplay where the overlay was. */
2456 if (!NILP (obuffer
))
2461 o_beg
= OVERLAY_START (overlay
);
2462 o_end
= OVERLAY_END (overlay
);
2463 o_beg
= OVERLAY_POSITION (o_beg
);
2464 o_end
= OVERLAY_POSITION (o_end
);
2466 redisplay_region (ob
, XINT (o_beg
), XINT (o_end
));
2469 /* Redisplay where the overlay is going to be. */
2470 redisplay_region (b
, XINT (beg
), XINT (end
));
2473 /* Redisplay the area the overlay has just left, or just enclosed. */
2477 int change_beg
, change_end
;
2479 o_beg
= OVERLAY_START (overlay
);
2480 o_end
= OVERLAY_END (overlay
);
2481 o_beg
= OVERLAY_POSITION (o_beg
);
2482 o_end
= OVERLAY_POSITION (o_end
);
2484 if (XINT (o_beg
) == XINT (beg
))
2485 redisplay_region (b
, XINT (o_end
), XINT (end
));
2486 else if (XINT (o_end
) == XINT (end
))
2487 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
2490 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
2491 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
2492 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
2496 if (!NILP (obuffer
))
2498 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
2499 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
2502 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
2503 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
2505 /* Put the overlay on the wrong list. */
2506 end
= OVERLAY_END (overlay
);
2507 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2508 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2510 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2512 /* This puts it in the right list, and in the right order. */
2513 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2515 return unbind_to (count
, overlay
);
2518 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
2519 "Delete the overlay OVERLAY from its buffer.")
2521 Lisp_Object overlay
;
2525 int count
= specpdl_ptr
- specpdl
;
2527 CHECK_OVERLAY (overlay
, 0);
2529 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2533 b
= XBUFFER (buffer
);
2535 specbind (Qinhibit_quit
, Qt
);
2537 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
2538 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
2540 redisplay_region (b
,
2541 marker_position (OVERLAY_START (overlay
)),
2542 marker_position (OVERLAY_END (overlay
)));
2544 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
2545 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
2547 return unbind_to (count
, Qnil
);
2550 /* Overlay dissection functions. */
2552 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
2553 "Return the position at which OVERLAY starts.")
2555 Lisp_Object overlay
;
2557 CHECK_OVERLAY (overlay
, 0);
2559 return (Fmarker_position (OVERLAY_START (overlay
)));
2562 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
2563 "Return the position at which OVERLAY ends.")
2565 Lisp_Object overlay
;
2567 CHECK_OVERLAY (overlay
, 0);
2569 return (Fmarker_position (OVERLAY_END (overlay
)));
2572 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
2573 "Return the buffer OVERLAY belongs to.")
2575 Lisp_Object overlay
;
2577 CHECK_OVERLAY (overlay
, 0);
2579 return Fmarker_buffer (OVERLAY_START (overlay
));
2582 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
2583 "Return a list of the properties on OVERLAY.\n\
2584 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
2587 Lisp_Object overlay
;
2589 CHECK_OVERLAY (overlay
, 0);
2591 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
2595 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
2596 "Return a list of the overlays that contain position POS.")
2601 Lisp_Object
*overlay_vec
;
2605 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2608 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2610 /* Put all the overlays we want in a vector in overlay_vec.
2611 Store the length in len. */
2612 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2613 (int *) 0, (int *) 0);
2615 /* Make a list of them all. */
2616 result
= Flist (noverlays
, overlay_vec
);
2618 xfree (overlay_vec
);
2622 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2624 "Return the next position after POS where an overlay starts or ends.\n\
2625 If there are no more overlay boundaries after POS, return (point-max).")
2631 Lisp_Object
*overlay_vec
;
2635 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2638 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2640 /* Put all the overlays we want in a vector in overlay_vec.
2641 Store the length in len.
2642 endpos gets the position where the next overlay starts. */
2643 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2644 &endpos
, (int *) 0);
2646 /* If any of these overlays ends before endpos,
2647 use its ending point instead. */
2648 for (i
= 0; i
< noverlays
; i
++)
2653 oend
= OVERLAY_END (overlay_vec
[i
]);
2654 oendpos
= OVERLAY_POSITION (oend
);
2655 if (oendpos
< endpos
)
2659 xfree (overlay_vec
);
2660 return make_number (endpos
);
2663 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
2664 Sprevious_overlay_change
, 1, 1, 0,
2665 "Return the previous position before POS where an overlay starts or ends.\n\
2666 If there are no more overlay boundaries before POS, return (point-min).")
2672 Lisp_Object
*overlay_vec
;
2677 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2680 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2682 /* At beginning of buffer, we know the answer;
2683 avoid bug subtracting 1 below. */
2684 if (XINT (pos
) == BEGV
)
2687 /* Put all the overlays we want in a vector in overlay_vec.
2688 Store the length in len.
2689 prevpos gets the position of an overlay end. */
2690 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2691 (int *) 0, &prevpos
);
2693 /* If any of these overlays starts after prevpos,
2694 maybe use its starting point instead. */
2695 for (i
= 0; i
< noverlays
; i
++)
2700 ostart
= OVERLAY_START (overlay_vec
[i
]);
2701 ostartpos
= OVERLAY_POSITION (ostart
);
2702 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2703 prevpos
= ostartpos
;
2706 /* If any overlay ends at pos, consider its starting point too. */
2707 for (tail
= current_buffer
->overlays_before
;
2709 tail
= XCONS (tail
)->cdr
)
2711 Lisp_Object overlay
, ostart
;
2714 overlay
= XCONS (tail
)->car
;
2716 ostart
= OVERLAY_START (overlay
);
2717 ostartpos
= OVERLAY_POSITION (ostart
);
2718 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2719 prevpos
= ostartpos
;
2722 xfree (overlay_vec
);
2723 return make_number (prevpos
);
2726 /* These functions are for debugging overlays. */
2728 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2729 "Return a pair of lists giving all the overlays of the current buffer.\n\
2730 The car has all the overlays before the overlay center;\n\
2731 the cdr has all the overlays after the overlay center.\n\
2732 Recentering overlays moves overlays between these lists.\n\
2733 The lists you get are copies, so that changing them has no effect.\n\
2734 However, the overlays you get are the real objects that the buffer uses.")
2737 Lisp_Object before
, after
;
2738 before
= current_buffer
->overlays_before
;
2740 before
= Fcopy_sequence (before
);
2741 after
= current_buffer
->overlays_after
;
2743 after
= Fcopy_sequence (after
);
2745 return Fcons (before
, after
);
2748 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2749 "Recenter the overlays of the current buffer around position POS.")
2753 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2755 recenter_overlay_lists (current_buffer
, XINT (pos
));
2759 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2760 "Get the property of overlay OVERLAY with property name NAME.")
2762 Lisp_Object overlay
, prop
;
2764 Lisp_Object plist
, fallback
;
2766 CHECK_OVERLAY (overlay
, 0);
2770 for (plist
= XOVERLAY (overlay
)->plist
;
2771 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2772 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2774 if (EQ (XCONS (plist
)->car
, prop
))
2775 return XCONS (XCONS (plist
)->cdr
)->car
;
2776 else if (EQ (XCONS (plist
)->car
, Qcategory
))
2779 tem
= Fcar (Fcdr (plist
));
2781 fallback
= Fget (tem
, prop
);
2788 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2789 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2790 (overlay
, prop
, value
)
2791 Lisp_Object overlay
, prop
, value
;
2793 Lisp_Object tail
, buffer
;
2796 CHECK_OVERLAY (overlay
, 0);
2798 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2800 for (tail
= XOVERLAY (overlay
)->plist
;
2801 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2802 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2803 if (EQ (XCONS (tail
)->car
, prop
))
2805 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
2806 XCONS (XCONS (tail
)->cdr
)->car
= value
;
2809 /* It wasn't in the list, so add it to the front. */
2810 changed
= !NILP (value
);
2811 XOVERLAY (overlay
)->plist
2812 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
2814 if (! NILP (buffer
))
2817 redisplay_region (XBUFFER (buffer
),
2818 marker_position (OVERLAY_START (overlay
)),
2819 marker_position (OVERLAY_END (overlay
)));
2820 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
2821 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
2822 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
2823 Fdelete_overlay (overlay
);
2828 /* Run the modification-hooks of overlays that include
2829 any part of the text in START to END.
2830 Run the insert-before-hooks of overlay starting at END,
2831 and the insert-after-hooks of overlay ending at START.
2833 This is called both before and after the modification.
2834 AFTER is nonzero when we call after the modification.
2836 ARG1, ARG2, ARG3 are arguments to pass to the hook functions. */
2839 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
2840 Lisp_Object start
, end
;
2842 Lisp_Object arg1
, arg2
, arg3
;
2844 Lisp_Object prop
, overlay
, tail
;
2845 int insertion
= EQ (start
, end
);
2847 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2851 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
2854 for (tail
= current_buffer
->overlays_before
;
2856 tail
= XCONS (tail
)->cdr
)
2858 int startpos
, endpos
;
2859 Lisp_Object ostart
, oend
;
2861 overlay
= XCONS (tail
)->car
;
2863 ostart
= OVERLAY_START (overlay
);
2864 oend
= OVERLAY_END (overlay
);
2865 endpos
= OVERLAY_POSITION (oend
);
2866 if (XFASTINT (start
) > endpos
)
2868 startpos
= OVERLAY_POSITION (ostart
);
2869 if (XFASTINT (end
) == startpos
&& insertion
)
2871 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2874 /* Copy TAIL in case the hook recenters the overlay lists. */
2876 tail
= Fcopy_sequence (tail
);
2878 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2881 if (XFASTINT (start
) == endpos
&& insertion
)
2883 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2887 tail
= Fcopy_sequence (tail
);
2889 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2892 /* Test for intersecting intervals. This does the right thing
2893 for both insertion and deletion. */
2894 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2896 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2900 tail
= Fcopy_sequence (tail
);
2902 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2908 for (tail
= current_buffer
->overlays_after
;
2910 tail
= XCONS (tail
)->cdr
)
2912 int startpos
, endpos
;
2913 Lisp_Object ostart
, oend
;
2915 overlay
= XCONS (tail
)->car
;
2917 ostart
= OVERLAY_START (overlay
);
2918 oend
= OVERLAY_END (overlay
);
2919 startpos
= OVERLAY_POSITION (ostart
);
2920 endpos
= OVERLAY_POSITION (oend
);
2921 if (XFASTINT (end
) < startpos
)
2923 if (XFASTINT (end
) == startpos
&& insertion
)
2925 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2929 tail
= Fcopy_sequence (tail
);
2931 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2934 if (XFASTINT (start
) == endpos
&& insertion
)
2936 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2940 tail
= Fcopy_sequence (tail
);
2942 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2945 /* Test for intersecting intervals. This does the right thing
2946 for both insertion and deletion. */
2947 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2949 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2953 tail
= Fcopy_sequence (tail
);
2955 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
2964 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
2965 Lisp_Object list
, overlay
;
2967 Lisp_Object arg1
, arg2
, arg3
;
2969 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2970 GCPRO4 (list
, arg1
, arg2
, arg3
);
2971 while (!NILP (list
))
2974 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
2976 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
2982 /* Delete any zero-sized overlays at position POS, if the `evaporate'
2985 evaporate_overlays (pos
)
2988 Lisp_Object tail
, overlay
, hit_list
;
2991 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
2992 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
2993 tail
= XCONS (tail
)->cdr
)
2996 overlay
= XCONS (tail
)->car
;
2997 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3000 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3001 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3002 hit_list
= Fcons (overlay
, hit_list
);
3005 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3006 tail
= XCONS (tail
)->cdr
)
3009 overlay
= XCONS (tail
)->car
;
3010 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3013 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3014 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3015 hit_list
= Fcons (overlay
, hit_list
);
3017 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3018 Fdelete_overlay (XCONS (hit_list
)->car
);
3021 /* Somebody has tried to store a value with an unacceptable type
3022 into the buffer-local slot with offset OFFSET. */
3024 buffer_slot_type_mismatch (offset
)
3029 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3030 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3032 case Lisp_Int
: type_name
= "integers"; break;
3033 case Lisp_String
: type_name
= "strings"; break;
3034 case Lisp_Symbol
: type_name
= "symbols"; break;
3039 error ("only %s should be stored in the buffer-local variable %s",
3040 type_name
, XSYMBOL (sym
)->name
->data
);
3045 register Lisp_Object tem
;
3047 /* Make sure all markable slots in buffer_defaults
3048 are initialized reasonably, so mark_buffer won't choke. */
3049 reset_buffer (&buffer_defaults
);
3050 reset_buffer_local_variables (&buffer_defaults
);
3051 reset_buffer (&buffer_local_symbols
);
3052 reset_buffer_local_variables (&buffer_local_symbols
);
3053 /* Prevent GC from getting confused. */
3054 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3055 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3056 #ifdef USE_TEXT_PROPERTIES
3057 BUF_INTERVALS (&buffer_defaults
) = 0;
3058 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3060 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3061 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3063 /* Set up the default values of various buffer slots. */
3064 /* Must do these before making the first buffer! */
3066 /* real setup is done in loaddefs.el */
3067 buffer_defaults
.mode_line_format
= build_string ("%-");
3068 buffer_defaults
.abbrev_mode
= Qnil
;
3069 buffer_defaults
.overwrite_mode
= Qnil
;
3070 buffer_defaults
.case_fold_search
= Qt
;
3071 buffer_defaults
.auto_fill_function
= Qnil
;
3072 buffer_defaults
.selective_display
= Qnil
;
3074 buffer_defaults
.selective_display_ellipses
= Qt
;
3076 buffer_defaults
.abbrev_table
= Qnil
;
3077 buffer_defaults
.display_table
= Qnil
;
3078 buffer_defaults
.undo_list
= Qnil
;
3079 buffer_defaults
.mark_active
= Qnil
;
3080 buffer_defaults
.file_format
= Qnil
;
3081 buffer_defaults
.overlays_before
= Qnil
;
3082 buffer_defaults
.overlays_after
= Qnil
;
3083 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3085 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3086 buffer_defaults
.truncate_lines
= Qnil
;
3087 buffer_defaults
.ctl_arrow
= Qt
;
3090 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3092 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3093 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3094 buffer_defaults
.cache_long_line_scans
= Qnil
;
3095 buffer_defaults
.file_truename
= Qnil
;
3097 /* Assign the local-flags to the slots that have default values.
3098 The local flag is a bit that is used in the buffer
3099 to say that it has its own local value for the slot.
3100 The local flag bits are in the local_var_flags slot of the buffer. */
3102 /* Nothing can work if this isn't true */
3103 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3105 /* 0 means not a lisp var, -1 means always local, else mask */
3106 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3107 XSETINT (buffer_local_flags
.filename
, -1);
3108 XSETINT (buffer_local_flags
.directory
, -1);
3109 XSETINT (buffer_local_flags
.backed_up
, -1);
3110 XSETINT (buffer_local_flags
.save_length
, -1);
3111 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3112 XSETINT (buffer_local_flags
.read_only
, -1);
3113 XSETINT (buffer_local_flags
.major_mode
, -1);
3114 XSETINT (buffer_local_flags
.mode_name
, -1);
3115 XSETINT (buffer_local_flags
.undo_list
, -1);
3116 XSETINT (buffer_local_flags
.mark_active
, -1);
3117 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3118 XSETINT (buffer_local_flags
.file_truename
, -1);
3119 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3121 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3122 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3123 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3124 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3125 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3126 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3128 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3130 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3131 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3132 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3133 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3134 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3135 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3136 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3137 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3138 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3139 XSETFASTINT (buffer_local_flags
.file_format
, 0x20000);
3141 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3144 Vbuffer_alist
= Qnil
;
3148 QSFundamental
= build_string ("Fundamental");
3150 Qfundamental_mode
= intern ("fundamental-mode");
3151 buffer_defaults
.major_mode
= Qfundamental_mode
;
3153 Qmode_class
= intern ("mode-class");
3155 Qprotected_field
= intern ("protected-field");
3157 Qpermanent_local
= intern ("permanent-local");
3159 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3161 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3162 /* super-magic invisible buffer */
3163 Vbuffer_alist
= Qnil
;
3165 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3170 char buf
[MAXPATHLEN
+1];
3172 struct stat dotstat
, pwdstat
;
3176 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3178 /* If PWD is accurate, use it instead of calling getwd. This is faster
3179 when PWD is right, and may avoid a fatal error. */
3180 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3181 && stat (pwd
, &pwdstat
) == 0
3182 && stat (".", &dotstat
) == 0
3183 && dotstat
.st_ino
== pwdstat
.st_ino
3184 && dotstat
.st_dev
== pwdstat
.st_dev
3185 && strlen (pwd
) < MAXPATHLEN
)
3187 else if (getwd (buf
) == 0)
3188 fatal ("`getwd' failed: %s\n", buf
);
3191 /* Maybe this should really use some standard subroutine
3192 whose definition is filename syntax dependent. */
3194 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3196 buf
[rc
] = DIRECTORY_SEP
;
3199 #endif /* not VMS */
3200 current_buffer
->directory
= build_string (buf
);
3202 temp
= get_minibuffer (0);
3203 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3206 /* initialize the buffer routines */
3209 extern Lisp_Object Qdisabled
;
3211 staticpro (&Vbuffer_defaults
);
3212 staticpro (&Vbuffer_local_symbols
);
3213 staticpro (&Qfundamental_mode
);
3214 staticpro (&Qmode_class
);
3215 staticpro (&QSFundamental
);
3216 staticpro (&Vbuffer_alist
);
3217 staticpro (&Qprotected_field
);
3218 staticpro (&Qpermanent_local
);
3219 staticpro (&Qkill_buffer_hook
);
3220 staticpro (&Qoverlayp
);
3221 Qevaporate
= intern ("evaporate");
3222 staticpro (&Qevaporate
);
3223 staticpro (&Qmodification_hooks
);
3224 Qmodification_hooks
= intern ("modification-hooks");
3225 staticpro (&Qinsert_in_front_hooks
);
3226 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3227 staticpro (&Qinsert_behind_hooks
);
3228 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3229 staticpro (&Qget_file_buffer
);
3230 Qget_file_buffer
= intern ("get-file-buffer");
3231 Qpriority
= intern ("priority");
3232 staticpro (&Qpriority
);
3233 Qwindow
= intern ("window");
3234 staticpro (&Qwindow
);
3235 Qbefore_string
= intern ("before-string");
3236 staticpro (&Qbefore_string
);
3237 Qafter_string
= intern ("after-string");
3238 staticpro (&Qafter_string
);
3240 Qoverlayp
= intern ("overlayp");
3242 Fput (Qprotected_field
, Qerror_conditions
,
3243 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
3244 Fput (Qprotected_field
, Qerror_message
,
3245 build_string ("Attempt to modify a protected field"));
3247 /* All these use DEFVAR_LISP_NOPRO because the slots in
3248 buffer_defaults will all be marked via Vbuffer_defaults. */
3250 DEFVAR_LISP_NOPRO ("default-mode-line-format",
3251 &buffer_defaults
.mode_line_format
,
3252 "Default value of `mode-line-format' for buffers that don't override it.\n\
3253 This is the same as (default-value 'mode-line-format).");
3255 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
3256 &buffer_defaults
.abbrev_mode
,
3257 "Default value of `abbrev-mode' for buffers that do not override it.\n\
3258 This is the same as (default-value 'abbrev-mode).");
3260 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
3261 &buffer_defaults
.ctl_arrow
,
3262 "Default value of `ctl-arrow' for buffers that do not override it.\n\
3263 This is the same as (default-value 'ctl-arrow).");
3265 DEFVAR_LISP_NOPRO ("default-truncate-lines",
3266 &buffer_defaults
.truncate_lines
,
3267 "Default value of `truncate-lines' for buffers that do not override it.\n\
3268 This is the same as (default-value 'truncate-lines).");
3270 DEFVAR_LISP_NOPRO ("default-fill-column",
3271 &buffer_defaults
.fill_column
,
3272 "Default value of `fill-column' for buffers that do not override it.\n\
3273 This is the same as (default-value 'fill-column).");
3275 DEFVAR_LISP_NOPRO ("default-left-margin",
3276 &buffer_defaults
.left_margin
,
3277 "Default value of `left-margin' for buffers that do not override it.\n\
3278 This is the same as (default-value 'left-margin).");
3280 DEFVAR_LISP_NOPRO ("default-tab-width",
3281 &buffer_defaults
.tab_width
,
3282 "Default value of `tab-width' for buffers that do not override it.\n\
3283 This is the same as (default-value 'tab-width).");
3285 DEFVAR_LISP_NOPRO ("default-case-fold-search",
3286 &buffer_defaults
.case_fold_search
,
3287 "Default value of `case-fold-search' for buffers that don't override it.\n\
3288 This is the same as (default-value 'case-fold-search).");
3291 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
3292 &buffer_defaults
.buffer_file_type
,
3293 "Default file type for buffers that do not override it.\n\
3294 This is the same as (default-value 'buffer-file-type).\n\
3295 The file type is nil for text, t for binary.");
3298 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
3301 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
3302 But make-docfile finds it!
3303 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
3305 "Template for displaying mode line for current buffer.\n\
3306 Each buffer has its own value of this variable.\n\
3307 Value may be a string, a symbol or a list or cons cell.\n\
3308 For a symbol, its value is used (but it is ignored if t or nil).\n\
3309 A string appearing directly as the value of a symbol is processed verbatim\n\
3310 in that the %-constructs below are not recognized.\n\
3311 For a list whose car is a symbol, the symbol's value is taken,\n\
3312 and if that is non-nil, the cadr of the list is processed recursively.\n\
3313 Otherwise, the caddr of the list (if there is one) is processed.\n\
3314 For a list whose car is a string or list, each element is processed\n\
3315 recursively and the results are effectively concatenated.\n\
3316 For a list whose car is an integer, the cdr of the list is processed\n\
3317 and padded (if the number is positive) or truncated (if negative)\n\
3318 to the width specified by that number.\n\
3319 A string is printed verbatim in the mode line except for %-constructs:\n\
3320 (%-constructs are allowed when the string is the entire mode-line-format\n\
3321 or when it is found in a cons-cell or a list)\n\
3322 %b -- print buffer name. %f -- print visited file name.\n\
3323 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
3324 % means buffer is read-only and * means it is modified.\n\
3325 For a modified read-only buffer, %* gives % and %+ gives *.\n\
3326 %s -- print process status. %l -- print the current line number.\n\
3327 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
3328 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
3329 or print Bottom or All.\n\
3330 %n -- print Narrow if appropriate.\n\
3331 %t -- print T if files is text, B if binary.\n\
3332 %[ -- print one [ for each recursive editing level. %] similar.\n\
3333 %% -- print %. %- -- print infinitely many dashes.\n\
3334 Decimal digits after the % specify field width to which to pad.");
3337 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
3338 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
3339 nil here means use current buffer's major mode.");
3341 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
3342 make_number (Lisp_Symbol
),
3343 "Symbol for current buffer's major mode.");
3345 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
3346 make_number (Lisp_String
),
3347 "Pretty name of current buffer's major mode (a string).");
3349 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
3350 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
3351 Automatically becomes buffer-local when set in any fashion.");
3353 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
3355 "*Non-nil if searches should ignore case.\n\
3356 Automatically becomes buffer-local when set in any fashion.");
3358 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
3359 make_number (Lisp_Int
),
3360 "*Column beyond which automatic line-wrapping should happen.\n\
3361 Automatically becomes buffer-local when set in any fashion.");
3363 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
3364 make_number (Lisp_Int
),
3365 "*Column for the default indent-line-function to indent to.\n\
3366 Linefeed indents to this column in Fundamental mode.\n\
3367 Automatically becomes buffer-local when set in any fashion.");
3369 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
3370 make_number (Lisp_Int
),
3371 "*Distance between tab stops (for display of tab characters), in columns.\n\
3372 Automatically becomes buffer-local when set in any fashion.");
3374 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
3375 "*Non-nil means display control chars with uparrow.\n\
3376 Nil means use backslash and octal digits.\n\
3377 Automatically becomes buffer-local when set in any fashion.\n\
3378 This variable does not apply to characters whose display is specified\n\
3379 in the current display table (if there is one).");
3381 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
3382 "*Non-nil means do not display continuation lines;\n\
3383 give each line of text one screen line.\n\
3384 Automatically becomes buffer-local when set in any fashion.\n\
3386 Note that this is overridden by the variable\n\
3387 `truncate-partial-width-windows' if that variable is non-nil\n\
3388 and this buffer is not full-frame width.");
3391 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
3393 "Non-nil if the visited file is a binary file.\n\
3394 This variable is meaningful on MS-DOG and Windows NT.\n\
3395 On those systems, it is automatically local in every buffer.\n\
3396 On other systems, this variable is normally always nil.");
3399 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
3400 make_number (Lisp_String
),
3401 "Name of default directory of current buffer. Should end with slash.\n\
3402 Each buffer has its own value of this variable.");
3404 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
3406 "Function called (if non-nil) to perform auto-fill.\n\
3407 It is called after self-inserting a space at a column beyond `fill-column'.\n\
3408 Each buffer has its own value of this variable.\n\
3409 NOTE: This variable is not an ordinary hook;\n\
3410 It may not be a list of functions.");
3412 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
3413 make_number (Lisp_String
),
3414 "Name of file visited in current buffer, or nil if not visiting a file.\n\
3415 Each buffer has its own value of this variable.");
3417 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
3418 make_number (Lisp_String
),
3419 "Truename of file visited in current buffer, or nil if not visiting a file.\n\
3420 The truename of a file is calculated by `file-truename'\n\
3421 and then abbreviated with `abbreviate-file-name'.\n\
3422 Each buffer has its own value of this variable.");
3424 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
3425 ¤t_buffer
->auto_save_file_name
,
3426 make_number (Lisp_String
),
3427 "Name of file for auto-saving current buffer,\n\
3428 or nil if buffer should not be auto-saved.\n\
3429 Each buffer has its own value of this variable.");
3431 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
3432 "Non-nil if this buffer is read-only.\n\
3433 Each buffer has its own value of this variable.");
3435 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
3436 "Non-nil if this buffer's file has been backed up.\n\
3437 Backing up is done before the first time the file is saved.\n\
3438 Each buffer has its own value of this variable.");
3440 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
3441 make_number (Lisp_Int
),
3442 "Length of current buffer when last read in, saved or auto-saved.\n\
3444 Each buffer has its own value of this variable.");
3446 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
3448 "Non-nil enables selective display:\n\
3449 Integer N as value means display only lines\n\
3450 that start with less than n columns of space.\n\
3451 A value of t means, after a ^M, all the rest of the line is invisible.\n\
3452 Then ^M's in the file are written into files as newlines.\n\n\
3453 Automatically becomes buffer-local when set in any fashion.");
3456 DEFVAR_PER_BUFFER ("selective-display-ellipses",
3457 ¤t_buffer
->selective_display_ellipses
,
3459 "t means display ... on previous line when a line is invisible.\n\
3460 Automatically becomes buffer-local when set in any fashion.");
3463 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
3464 "Non-nil if self-insertion should replace existing text.\n\
3465 The value should be one of `overwrite-mode-textual',\n\
3466 `overwrite-mode-binary', or nil.\n\
3467 If it is `overwrite-mode-textual', self-insertion still\n\
3468 inserts at the end of a line, and inserts when point is before a tab,\n\
3469 until the tab is filled in.\n\
3470 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
3471 Automatically becomes buffer-local when set in any fashion.");
3473 #if 0 /* The doc string is too long for some compilers,
3474 but make-docfile can find it in this comment. */
3475 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3477 "Display table that controls display of the contents of current buffer.\n\
3478 Automatically becomes buffer-local when set in any fashion.\n\
3479 The display table is a vector created with `make-display-table'.\n\
3480 The first 256 elements control how to display each possible text character.\n\
3481 Each value should be a vector of characters or nil;\n\
3482 nil means display the character in the default fashion.\n\
3483 The remaining six elements control the display of\n\
3484 the end of a truncated screen line (element 256, a single character);\n\
3485 the end of a continued line (element 257, a single character);\n\
3486 the escape character used to display character codes in octal\n\
3487 (element 258, a single character);\n\
3488 the character used as an arrow for control characters (element 259,\n\
3489 a single character);\n\
3490 the decoration indicating the presence of invisible lines (element 260,\n\
3491 a vector of characters);\n\
3492 the character used to draw the border between side-by-side windows\n\
3493 (element 261, a single character).\n\
3494 If this variable is nil, the value of `standard-display-table' is used.\n\
3495 Each window can have its own, overriding display table.");
3497 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3500 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
3503 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
3504 "Function to call before each text change.\n\
3505 Two arguments are passed to the function: the positions of\n\
3506 the beginning and end of the range of old text to be changed.\n\
3507 \(For an insertion, the beginning and end are at the same place.)\n\
3508 No information is given about the length of the text after the change.\n\
3510 Buffer changes made while executing the `before-change-function'\n\
3511 don't call any before-change or after-change functions.\n\
3512 That's because these variables are temporarily set to nil.\n\
3513 As a result, a hook function cannot straightforwardly alter the value of\n\
3514 these variables. See the Emacs Lisp manual for a way of\n\
3515 accomplishing an equivalent result by using other variables.");
3516 Vbefore_change_function
= Qnil
;
3518 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
3519 "Function to call after each text change.\n\
3520 Three arguments are passed to the function: the positions of\n\
3521 the beginning and end of the range of changed text,\n\
3522 and the length of the pre-change text replaced by that range.\n\
3523 \(For an insertion, the pre-change length is zero;\n\
3524 for a deletion, that length is the number of characters deleted,\n\
3525 and the post-change beginning and end are at the same place.)\n\
3527 Buffer changes made while executing the `after-change-function'\n\
3528 don't call any before-change or after-change functions.\n\
3529 That's because these variables are temporarily set to nil.\n\
3530 As a result, a hook function cannot straightforwardly alter the value of\n\
3531 these variables. See the Emacs Lisp manual for a way of\n\
3532 accomplishing an equivalent result by using other variables.");
3533 Vafter_change_function
= Qnil
;
3535 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
3536 "List of functions to call before each text change.\n\
3537 Two arguments are passed to each function: the positions of\n\
3538 the beginning and end of the range of old text to be changed.\n\
3539 \(For an insertion, the beginning and end are at the same place.)\n\
3540 No information is given about the length of the text after the change.\n\
3542 Buffer changes made while executing the `before-change-functions'\n\
3543 don't call any before-change or after-change functions.\n\
3544 That's because these variables are temporarily set to nil.\n\
3545 As a result, a hook function cannot straightforwardly alter the value of\n\
3546 these variables. See the Emacs Lisp manual for a way of\n\
3547 accomplishing an equivalent result by using other variables.");
3548 Vbefore_change_functions
= Qnil
;
3550 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
3551 "List of function to call after each text change.\n\
3552 Three arguments are passed to each function: the positions of\n\
3553 the beginning and end of the range of changed text,\n\
3554 and the length of the pre-change text replaced by that range.\n\
3555 \(For an insertion, the pre-change length is zero;\n\
3556 for a deletion, that length is the number of characters deleted,\n\
3557 and the post-change beginning and end are at the same place.)\n\
3559 Buffer changes made while executing the `after-change-functions'\n\
3560 don't call any before-change or after-change functions.\n\
3561 That's because these variables are temporarily set to nil.\n\
3562 As a result, a hook function cannot straightforwardly alter the value of\n\
3563 these variables. See the Emacs Lisp manual for a way of\n\
3564 accomplishing an equivalent result by using other variables.");
3566 Vafter_change_functions
= Qnil
;
3568 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
3569 "A list of functions to call before changing a buffer which is unmodified.\n\
3570 The functions are run using the `run-hooks' function.");
3571 Vfirst_change_hook
= Qnil
;
3572 Qfirst_change_hook
= intern ("first-change-hook");
3573 staticpro (&Qfirst_change_hook
);
3575 #if 0 /* The doc string is too long for some compilers,
3576 but make-docfile can find it in this comment. */
3577 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3578 "List of undo entries in current buffer.\n\
3579 Recent changes come first; older changes follow newer.\n\
3581 An entry (BEG . END) represents an insertion which begins at\n\
3582 position BEG and ends at position END.\n\
3584 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
3585 from (abs POSITION). If POSITION is positive, point was at the front\n\
3586 of the text being deleted; if negative, point was at the end.\n\
3588 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
3589 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
3590 of the visited file's modification time, as of that time. If the\n\
3591 modification time of the most recent save is different, this entry is\n\
3594 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
3595 was modified between BEG and END. PROPERTY is the property name,\n\
3596 and VALUE is the old value.\n\
3598 An entry of the form POSITION indicates that point was at the buffer\n\
3599 location given by the integer. Undoing an entry of this form places\n\
3600 point at POSITION.\n\
3602 nil marks undo boundaries. The undo command treats the changes\n\
3603 between two undo boundaries as a single step to be undone.\n\
3605 If the value of the variable is t, undo information is not recorded.");
3607 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3610 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
3611 "Non-nil means the mark and region are currently active in this buffer.\n\
3612 Automatically local in all buffers.");
3614 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
3615 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
3616 This variable is buffer-local, in all buffers.\n\
3618 Normally, the line-motion functions work by scanning the buffer for\n\
3619 newlines. Columnar operations (like move-to-column and\n\
3620 compute-motion) also work by scanning the buffer, summing character\n\
3621 widths as they go. This works well for ordinary text, but if the\n\
3622 buffer's lines are very long (say, more than 500 characters), these\n\
3623 motion functions will take longer to execute. Emacs may also take\n\
3624 longer to update the display.\n\
3626 If cache-long-line-scans is non-nil, these motion functions cache the\n\
3627 results of their scans, and consult the cache to avoid rescanning\n\
3628 regions of the buffer until the text is modified. The caches are most\n\
3629 beneficial when they prevent the most searching---that is, when the\n\
3630 buffer contains long lines and large regions of characters with the\n\
3631 same, fixed screen width.\n\
3633 When cache-long-line-scans is non-nil, processing short lines will\n\
3634 become slightly slower (because of the overhead of consulting the\n\
3635 cache), and the caches will use memory roughly proportional to the\n\
3636 number of newlines and characters whose screen width varies.\n\
3638 The caches require no explicit maintenance; their accuracy is\n\
3639 maintained internally by the Emacs primitives. Enabling or disabling\n\
3640 the cache should not affect the behavior of any of the motion\n\
3641 functions; it should only affect their performance.");
3643 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
3644 "Value of point before the last series of scroll operations, or nil.");
3646 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
3647 "List of formats to use when saving this buffer.\n\
3648 Formats are defined by `format-alist'. This variable is\n\
3649 set when a file is visited. Automatically local in all buffers.");
3651 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
3652 ¤t_buffer
->invisibility_spec
, Qnil
,
3653 "Invisibility spec of this buffer.\n\
3654 The default is t, which means that text is invisible\n\
3655 if it has a non-nil `invisible' property.\n\
3656 If the value is a list, a text character is invisible if its `invisible'\n\
3657 property is an element in that list.\n\
3658 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
3659 then characters with property value PROP are invisible,\n\
3660 and they have an ellipsis as well if ELLIPSIS is non-nil.");
3662 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
3663 "*Non-nil means deactivate the mark when the buffer contents change.");
3664 Vtransient_mark_mode
= Qnil
;
3666 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
3667 "*Non-nil means disregard read-only status of buffers or characters.\n\
3668 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
3669 text properties. If the value is a list, disregard `buffer-read-only'\n\
3670 and disregard a `read-only' text property if the property value\n\
3671 is a member of the list.");
3672 Vinhibit_read_only
= Qnil
;
3674 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
3675 "List of functions called with no args to query before killing a buffer.");
3676 Vkill_buffer_query_functions
= Qnil
;
3678 defsubr (&Sbuffer_list
);
3679 defsubr (&Sget_buffer
);
3680 defsubr (&Sget_file_buffer
);
3681 defsubr (&Sget_buffer_create
);
3682 defsubr (&Smake_indirect_buffer
);
3683 defsubr (&Sgenerate_new_buffer_name
);
3684 defsubr (&Sbuffer_name
);
3685 /*defsubr (&Sbuffer_number);*/
3686 defsubr (&Sbuffer_file_name
);
3687 defsubr (&Sbuffer_base_buffer
);
3688 defsubr (&Sbuffer_local_variables
);
3689 defsubr (&Sbuffer_modified_p
);
3690 defsubr (&Sset_buffer_modified_p
);
3691 defsubr (&Sbuffer_modified_tick
);
3692 defsubr (&Srename_buffer
);
3693 defsubr (&Sother_buffer
);
3694 defsubr (&Sbuffer_disable_undo
);
3695 defsubr (&Sbuffer_enable_undo
);
3696 defsubr (&Skill_buffer
);
3697 defsubr (&Serase_buffer
);
3698 defsubr (&Sset_buffer_major_mode
);
3699 defsubr (&Sswitch_to_buffer
);
3700 defsubr (&Spop_to_buffer
);
3701 defsubr (&Scurrent_buffer
);
3702 defsubr (&Sset_buffer
);
3703 defsubr (&Sbarf_if_buffer_read_only
);
3704 defsubr (&Sbury_buffer
);
3705 defsubr (&Skill_all_local_variables
);
3707 defsubr (&Soverlayp
);
3708 defsubr (&Smake_overlay
);
3709 defsubr (&Sdelete_overlay
);
3710 defsubr (&Smove_overlay
);
3711 defsubr (&Soverlay_start
);
3712 defsubr (&Soverlay_end
);
3713 defsubr (&Soverlay_buffer
);
3714 defsubr (&Soverlay_properties
);
3715 defsubr (&Soverlays_at
);
3716 defsubr (&Snext_overlay_change
);
3717 defsubr (&Sprevious_overlay_change
);
3718 defsubr (&Soverlay_recenter
);
3719 defsubr (&Soverlay_lists
);
3720 defsubr (&Soverlay_get
);
3721 defsubr (&Soverlay_put
);
3726 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
3727 initial_define_key (control_x_map
, 'k', "kill-buffer");
3729 /* This must not be in syms_of_buffer, because Qdisabled is not
3730 initialized when that function gets called. */
3731 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);