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 /* Find all the overlays in the current buffer that overlap the range BEG-END
1698 or are empty at BEG.
1700 Return the number found, and store them in a vector in *VEC_PTR.
1701 Store in *LEN_PTR the size allocated for the vector.
1702 Store in *NEXT_PTR the next position after POS where an overlay starts,
1703 or ZV if there are no more overlays.
1704 Store in *PREV_PTR the previous position before POS where an overlay ends,
1705 or BEGV if there are no previous overlays.
1706 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1708 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1709 when this function is called.
1711 If EXTEND is non-zero, we make the vector bigger if necessary.
1712 If EXTEND is zero, we never extend the vector,
1713 and we store only as many overlays as will fit.
1714 But we still return the total number of overlays. */
1717 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1720 Lisp_Object
**vec_ptr
;
1725 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
1728 Lisp_Object
*vec
= *vec_ptr
;
1731 int inhibit_storing
= 0;
1733 for (tail
= current_buffer
->overlays_before
;
1735 tail
= XCONS (tail
)->cdr
)
1737 int startpos
, endpos
;
1739 overlay
= XCONS (tail
)->car
;
1741 ostart
= OVERLAY_START (overlay
);
1742 oend
= OVERLAY_END (overlay
);
1743 endpos
= OVERLAY_POSITION (oend
);
1750 startpos
= OVERLAY_POSITION (ostart
);
1751 /* Count an interval if it either overlaps the range
1752 or is empty at the start of the range. */
1753 if ((beg
< endpos
&& startpos
< end
)
1754 || (startpos
== endpos
&& beg
== endpos
))
1758 /* The supplied vector is full.
1759 Either make it bigger, or don't store any more in it. */
1762 *len_ptr
= len
*= 2;
1763 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1767 inhibit_storing
= 1;
1770 if (!inhibit_storing
)
1772 /* Keep counting overlays even if we can't return them all. */
1775 else if (startpos
< next
)
1779 for (tail
= current_buffer
->overlays_after
;
1781 tail
= XCONS (tail
)->cdr
)
1783 int startpos
, endpos
;
1785 overlay
= XCONS (tail
)->car
;
1787 ostart
= OVERLAY_START (overlay
);
1788 oend
= OVERLAY_END (overlay
);
1789 startpos
= OVERLAY_POSITION (ostart
);
1792 if (startpos
< next
)
1796 endpos
= OVERLAY_POSITION (oend
);
1797 /* Count an interval if it either overlaps the range
1798 or is empty at the start of the range. */
1799 if ((beg
< endpos
&& startpos
< end
)
1800 || (startpos
== endpos
&& beg
== endpos
))
1806 *len_ptr
= len
*= 2;
1807 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1811 inhibit_storing
= 1;
1814 if (!inhibit_storing
)
1818 else if (endpos
< beg
&& endpos
> prev
)
1829 /* Fast function to just test if we're at an overlay boundary. */
1831 overlay_touches_p (pos
)
1834 Lisp_Object tail
, overlay
;
1836 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
1837 tail
= XCONS (tail
)->cdr
)
1841 overlay
= XCONS (tail
)->car
;
1842 if (!GC_OVERLAYP (overlay
))
1845 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1848 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
1852 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
1853 tail
= XCONS (tail
)->cdr
)
1857 overlay
= XCONS (tail
)->car
;
1858 if (!GC_OVERLAYP (overlay
))
1861 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1864 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
1872 Lisp_Object overlay
;
1878 compare_overlays (s1
, s2
)
1879 struct sortvec
*s1
, *s2
;
1881 if (s1
->priority
!= s2
->priority
)
1882 return s1
->priority
- s2
->priority
;
1883 if (s1
->beg
!= s2
->beg
)
1884 return s1
->beg
- s2
->beg
;
1885 if (s1
->end
!= s2
->end
)
1886 return s2
->end
- s1
->end
;
1890 /* Sort an array of overlays by priority. The array is modified in place.
1891 The return value is the new size; this may be smaller than the original
1892 size if some of the overlays were invalid or were window-specific. */
1894 sort_overlays (overlay_vec
, noverlays
, w
)
1895 Lisp_Object
*overlay_vec
;
1900 struct sortvec
*sortvec
;
1901 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1903 /* Put the valid and relevant overlays into sortvec. */
1905 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1908 Lisp_Object overlay
;
1910 overlay
= overlay_vec
[i
];
1911 if (OVERLAY_VALID (overlay
)
1912 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1913 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1915 /* If we're interested in a specific window, then ignore
1916 overlays that are limited to some other window. */
1921 window
= Foverlay_get (overlay
, Qwindow
);
1922 if (WINDOWP (window
) && XWINDOW (window
) != w
)
1926 /* This overlay is good and counts: put it into sortvec. */
1927 sortvec
[j
].overlay
= overlay
;
1928 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1929 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1930 tem
= Foverlay_get (overlay
, Qpriority
);
1932 sortvec
[j
].priority
= XINT (tem
);
1934 sortvec
[j
].priority
= 0;
1940 /* Sort the overlays into the proper order: increasing priority. */
1943 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1945 for (i
= 0; i
< noverlays
; i
++)
1946 overlay_vec
[i
] = sortvec
[i
].overlay
;
1957 /* A comparison function suitable for passing to qsort. */
1959 cmp_for_strings (as1
, as2
)
1962 struct sortstr
*s1
= (struct sortstr
*)as1
;
1963 struct sortstr
*s2
= (struct sortstr
*)as2
;
1964 if (s1
->size
!= s2
->size
)
1965 return s2
->size
- s1
->size
;
1966 if (s1
->priority
!= s2
->priority
)
1967 return s1
->priority
- s2
->priority
;
1971 /* Buffers for storing the overlays touching a given position.
1972 These are expanded as needed, but never freed. */
1973 static struct sortstr
*overlay_heads
, *overlay_tails
;
1974 static char *overlay_str_buf
;
1976 /* Allocated length of those buffers. */
1977 static int overlay_heads_len
, overlay_tails_len
, overlay_str_len
;
1979 /* Return the concatenation of the strings associated with overlays that
1980 begin or end at POS, ignoring overlays that are specific to a window
1981 other than W. The strings are concatenated in the appropriate order:
1982 shorter overlays nest inside longer ones, and higher priority inside
1983 lower. Returns the string length, and stores the contents indirectly
1984 through PSTR, if that variable is non-null. The string may be
1985 overwritten by subsequent calls. */
1987 overlay_strings (pos
, w
, pstr
)
1992 Lisp_Object ov
, overlay
, window
, str
, tem
;
1993 int ntail
= 0, nhead
= 0;
1995 int startpos
, endpos
;
1997 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
1999 overlay
= XCONS (ov
)->car
;
2000 if (!OVERLAYP (overlay
))
2003 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2004 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2007 if (endpos
!= pos
&& startpos
!= pos
)
2009 window
= Foverlay_get (overlay
, Qwindow
);
2010 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2014 str
= Foverlay_get (overlay
, Qafter_string
);
2017 if (ntail
== overlay_tails_len
)
2019 if (! overlay_tails
)
2021 overlay_tails_len
= 5;
2022 overlay_tails
= ((struct sortstr
*)
2023 xmalloc (5 * sizeof (struct sortstr
)));
2027 overlay_tails_len
*= 2;
2028 overlay_tails
= ((struct sortstr
*)
2029 xrealloc (overlay_tails
,
2031 * sizeof (struct sortstr
))));
2034 overlay_tails
[ntail
].string
= str
;
2035 overlay_tails
[ntail
].size
= endpos
- startpos
;
2036 tem
= Foverlay_get (overlay
, Qpriority
);
2037 overlay_tails
[ntail
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
2039 total
+= XSTRING (str
)->size
;
2042 if (startpos
== pos
)
2044 str
= Foverlay_get (overlay
, Qbefore_string
);
2047 if (nhead
== overlay_heads_len
)
2049 if (! overlay_heads
)
2051 overlay_heads_len
= 5;
2052 overlay_heads
= ((struct sortstr
*)
2053 xmalloc (5 * sizeof (struct sortstr
)));
2057 overlay_heads_len
*= 2;
2058 overlay_heads
= ((struct sortstr
*)
2059 xrealloc (overlay_heads
,
2061 * sizeof (struct sortstr
))));
2064 overlay_heads
[nhead
].string
= str
;
2065 overlay_heads
[nhead
].size
= endpos
- startpos
;
2066 tem
= Foverlay_get (overlay
, Qpriority
);
2067 overlay_heads
[nhead
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
2069 total
+= XSTRING (str
)->size
;
2073 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2075 overlay
= XCONS (ov
)->car
;
2076 if (!OVERLAYP (overlay
))
2079 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2080 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2085 str
= Foverlay_get (overlay
, Qafter_string
);
2088 if (ntail
== overlay_tails_len
)
2090 if (! overlay_tails
)
2092 overlay_tails_len
= 5;
2093 overlay_tails
= ((struct sortstr
*)
2094 xmalloc (5 * sizeof (struct sortstr
)));
2098 overlay_tails_len
*= 2;
2099 overlay_tails
= ((struct sortstr
*)
2100 xrealloc (overlay_tails
,
2102 * sizeof (struct sortstr
))));
2105 overlay_tails
[ntail
].string
= str
;
2106 overlay_tails
[ntail
].size
= endpos
- startpos
;
2107 tem
= Foverlay_get (overlay
, Qpriority
);
2108 overlay_tails
[ntail
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
2110 total
+= XSTRING (str
)->size
;
2113 if (startpos
== pos
)
2115 str
= Foverlay_get (overlay
, Qbefore_string
);
2118 if (nhead
== overlay_heads_len
)
2120 if (! overlay_heads
)
2122 overlay_heads_len
= 5;
2123 overlay_heads
= ((struct sortstr
*)
2124 xmalloc (5 * sizeof (struct sortstr
)));
2128 overlay_heads_len
*= 2;
2129 overlay_heads
= ((struct sortstr
*)
2130 xrealloc (overlay_heads
,
2132 * sizeof (struct sortstr
))));
2135 overlay_heads
[nhead
].string
= str
;
2136 overlay_heads
[nhead
].size
= endpos
- startpos
;
2137 tem
= Foverlay_get (overlay
, Qpriority
);
2138 overlay_heads
[nhead
].priority
= (INTEGERP (tem
) ? XINT (tem
) : 0);
2140 total
+= XSTRING (str
)->size
;
2145 qsort (overlay_tails
, ntail
, sizeof (struct sortstr
), cmp_for_strings
);
2147 qsort (overlay_heads
, nhead
, sizeof (struct sortstr
), cmp_for_strings
);
2153 if (total
> overlay_str_len
)
2155 if (! overlay_str_buf
)
2156 overlay_str_buf
= (char *)xmalloc (total
);
2158 overlay_str_buf
= (char *)xrealloc (overlay_str_buf
, total
);
2159 overlay_str_len
= total
;
2161 p
= overlay_str_buf
;
2162 for (i
= ntail
; --i
>= 0;)
2164 tem
= overlay_tails
[i
].string
;
2165 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2166 p
+= XSTRING (tem
)->size
;
2168 for (i
= 0; i
< nhead
; ++i
)
2170 tem
= overlay_heads
[i
].string
;
2171 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2172 p
+= XSTRING (tem
)->size
;
2175 *pstr
= overlay_str_buf
;
2180 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2183 recenter_overlay_lists (buf
, pos
)
2187 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2189 /* See if anything in overlays_before should move to overlays_after. */
2191 /* We don't strictly need prev in this loop; it should always be nil.
2192 But we use it for symmetry and in case that should cease to be true
2193 with some future change. */
2195 for (tail
= buf
->overlays_before
;
2197 prev
= tail
, tail
= next
)
2199 next
= XCONS (tail
)->cdr
;
2200 overlay
= XCONS (tail
)->car
;
2202 /* If the overlay is not valid, get rid of it. */
2203 if (!OVERLAY_VALID (overlay
))
2208 /* Splice the cons cell TAIL out of overlays_before. */
2210 XCONS (prev
)->cdr
= next
;
2212 buf
->overlays_before
= next
;
2218 beg
= OVERLAY_START (overlay
);
2219 end
= OVERLAY_END (overlay
);
2221 if (OVERLAY_POSITION (end
) > pos
)
2223 /* OVERLAY needs to be moved. */
2224 int where
= OVERLAY_POSITION (beg
);
2225 Lisp_Object other
, other_prev
;
2227 /* Splice the cons cell TAIL out of overlays_before. */
2229 XCONS (prev
)->cdr
= next
;
2231 buf
->overlays_before
= next
;
2233 /* Search thru overlays_after for where to put it. */
2235 for (other
= buf
->overlays_after
;
2237 other_prev
= other
, other
= XCONS (other
)->cdr
)
2239 Lisp_Object otherbeg
, otheroverlay
, follower
;
2242 otheroverlay
= XCONS (other
)->car
;
2243 if (! OVERLAY_VALID (otheroverlay
))
2246 otherbeg
= OVERLAY_START (otheroverlay
);
2247 if (OVERLAY_POSITION (otherbeg
) >= where
)
2251 /* Add TAIL to overlays_after before OTHER. */
2252 XCONS (tail
)->cdr
= other
;
2253 if (!NILP (other_prev
))
2254 XCONS (other_prev
)->cdr
= tail
;
2256 buf
->overlays_after
= tail
;
2260 /* We've reached the things that should stay in overlays_before.
2261 All the rest of overlays_before must end even earlier,
2266 /* See if anything in overlays_after should be in overlays_before. */
2268 for (tail
= buf
->overlays_after
;
2270 prev
= tail
, tail
= next
)
2272 next
= XCONS (tail
)->cdr
;
2273 overlay
= XCONS (tail
)->car
;
2275 /* If the overlay is not valid, get rid of it. */
2276 if (!OVERLAY_VALID (overlay
))
2281 /* Splice the cons cell TAIL out of overlays_after. */
2283 XCONS (prev
)->cdr
= next
;
2285 buf
->overlays_after
= next
;
2291 beg
= OVERLAY_START (overlay
);
2292 end
= OVERLAY_END (overlay
);
2294 /* Stop looking, when we know that nothing further
2295 can possibly end before POS. */
2296 if (OVERLAY_POSITION (beg
) > pos
)
2299 if (OVERLAY_POSITION (end
) <= pos
)
2301 /* OVERLAY needs to be moved. */
2302 int where
= OVERLAY_POSITION (end
);
2303 Lisp_Object other
, other_prev
;
2305 /* Splice the cons cell TAIL out of overlays_after. */
2307 XCONS (prev
)->cdr
= next
;
2309 buf
->overlays_after
= next
;
2311 /* Search thru overlays_before for where to put it. */
2313 for (other
= buf
->overlays_before
;
2315 other_prev
= other
, other
= XCONS (other
)->cdr
)
2317 Lisp_Object otherend
, otheroverlay
;
2320 otheroverlay
= XCONS (other
)->car
;
2321 if (! OVERLAY_VALID (otheroverlay
))
2324 otherend
= OVERLAY_END (otheroverlay
);
2325 if (OVERLAY_POSITION (otherend
) <= where
)
2329 /* Add TAIL to overlays_before before OTHER. */
2330 XCONS (tail
)->cdr
= other
;
2331 if (!NILP (other_prev
))
2332 XCONS (other_prev
)->cdr
= tail
;
2334 buf
->overlays_before
= tail
;
2339 XSETFASTINT (buf
->overlay_center
, pos
);
2343 adjust_overlays_for_insert (pos
, length
)
2347 /* After an insertion, the lists are still sorted properly,
2348 but we may need to update the value of the overlay center. */
2349 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2350 XSETFASTINT (current_buffer
->overlay_center
,
2351 XFASTINT (current_buffer
->overlay_center
) + length
);
2355 adjust_overlays_for_delete (pos
, length
)
2359 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2360 /* The deletion was to our right. No change needed; the before- and
2361 after-lists are still consistent. */
2363 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2364 /* The deletion was to our left. We need to adjust the center value
2365 to account for the change in position, but the lists are consistent
2366 given the new value. */
2367 XSETFASTINT (current_buffer
->overlay_center
,
2368 XFASTINT (current_buffer
->overlay_center
) - length
);
2370 /* We're right in the middle. There might be things on the after-list
2371 that now belong on the before-list. Recentering will move them,
2372 and also update the center point. */
2373 recenter_overlay_lists (current_buffer
, pos
);
2376 /* Fix up overlays that were garbled as a result of permuting markers
2377 in the range START through END. Any overlay with at least one
2378 endpoint in this range will need to be unlinked from the overlay
2379 list and reinserted in its proper place.
2380 Such an overlay might even have negative size at this point.
2381 If so, we'll reverse the endpoints. Can you think of anything
2382 better to do in this situation? */
2384 fix_overlays_in_range (start
, end
)
2385 register int start
, end
;
2387 Lisp_Object tem
, overlay
;
2388 Lisp_Object before_list
, after_list
;
2389 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2390 int startpos
, endpos
;
2392 /* This algorithm shifts links around instead of consing and GCing.
2393 The loop invariant is that before_list (resp. after_list) is a
2394 well-formed list except that its last element, the one that
2395 *pbefore (resp. *pafter) points to, is still uninitialized.
2396 So it's not a bug that before_list isn't initialized, although
2397 it may look strange. */
2398 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2400 overlay
= XCONS (*ptail
)->car
;
2401 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2404 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2406 || (startpos
>= start
&& startpos
< end
))
2408 /* If the overlay is backwards, fix that now. */
2409 if (startpos
> endpos
)
2412 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2413 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2414 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2416 /* Add it to the end of the wrong list. Later on,
2417 recenter_overlay_lists will move it to the right place. */
2418 if (endpos
< XINT (current_buffer
->overlay_center
))
2421 pafter
= &XCONS (*ptail
)->cdr
;
2426 pbefore
= &XCONS (*ptail
)->cdr
;
2428 *ptail
= XCONS (*ptail
)->cdr
;
2431 ptail
= &XCONS (*ptail
)->cdr
;
2433 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2435 overlay
= XCONS (*ptail
)->car
;
2436 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2437 if (startpos
>= end
)
2439 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2440 if (startpos
>= start
2441 || (endpos
>= start
&& endpos
< end
))
2443 if (startpos
> endpos
)
2446 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2447 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2448 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2450 if (endpos
< XINT (current_buffer
->overlay_center
))
2453 pafter
= &XCONS (*ptail
)->cdr
;
2458 pbefore
= &XCONS (*ptail
)->cdr
;
2460 *ptail
= XCONS (*ptail
)->cdr
;
2463 ptail
= &XCONS (*ptail
)->cdr
;
2466 /* Splice the constructed (wrong) lists into the buffer's lists,
2467 and let the recenter function make it sane again. */
2468 *pbefore
= current_buffer
->overlays_before
;
2469 current_buffer
->overlays_before
= before_list
;
2470 recenter_overlay_lists (current_buffer
,
2471 XINT (current_buffer
->overlay_center
));
2473 *pafter
= current_buffer
->overlays_after
;
2474 current_buffer
->overlays_after
= after_list
;
2475 recenter_overlay_lists (current_buffer
,
2476 XINT (current_buffer
->overlay_center
));
2479 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2480 "Return t if OBJECT is an overlay.")
2484 return (OVERLAYP (object
) ? Qt
: Qnil
);
2487 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
2488 "Create a new overlay with range BEG to END in BUFFER.\n\
2489 If omitted, BUFFER defaults to the current buffer.\n\
2490 BEG and END may be integers or markers.")
2492 Lisp_Object beg
, end
, buffer
;
2494 Lisp_Object overlay
;
2498 XSETBUFFER (buffer
, current_buffer
);
2500 CHECK_BUFFER (buffer
, 2);
2502 && ! EQ (Fmarker_buffer (beg
), buffer
))
2503 error ("Marker points into wrong buffer");
2505 && ! EQ (Fmarker_buffer (end
), buffer
))
2506 error ("Marker points into wrong buffer");
2508 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2509 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2511 if (XINT (beg
) > XINT (end
))
2514 temp
= beg
; beg
= end
; end
= temp
;
2517 b
= XBUFFER (buffer
);
2519 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2520 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2522 overlay
= allocate_misc ();
2523 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2524 XOVERLAY (overlay
)->start
= beg
;
2525 XOVERLAY (overlay
)->end
= end
;
2526 XOVERLAY (overlay
)->plist
= Qnil
;
2528 /* Put the new overlay on the wrong list. */
2529 end
= OVERLAY_END (overlay
);
2530 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2531 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2533 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2535 /* This puts it in the right list, and in the right order. */
2536 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2538 /* We don't need to redisplay the region covered by the overlay, because
2539 the overlay has no properties at the moment. */
2544 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
2545 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
2546 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
2547 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
2549 (overlay
, beg
, end
, buffer
)
2550 Lisp_Object overlay
, beg
, end
, buffer
;
2552 struct buffer
*b
, *ob
;
2553 Lisp_Object obuffer
;
2554 int count
= specpdl_ptr
- specpdl
;
2556 CHECK_OVERLAY (overlay
, 0);
2558 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2560 XSETBUFFER (buffer
, current_buffer
);
2561 CHECK_BUFFER (buffer
, 3);
2564 && ! EQ (Fmarker_buffer (beg
), buffer
))
2565 error ("Marker points into wrong buffer");
2567 && ! EQ (Fmarker_buffer (end
), buffer
))
2568 error ("Marker points into wrong buffer");
2570 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2571 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2573 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
2574 return Fdelete_overlay (overlay
);
2576 if (XINT (beg
) > XINT (end
))
2579 temp
= beg
; beg
= end
; end
= temp
;
2582 specbind (Qinhibit_quit
, Qt
);
2584 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2585 b
= XBUFFER (buffer
);
2586 ob
= XBUFFER (obuffer
);
2588 /* If the overlay has changed buffers, do a thorough redisplay. */
2589 if (!EQ (buffer
, obuffer
))
2591 /* Redisplay where the overlay was. */
2592 if (!NILP (obuffer
))
2597 o_beg
= OVERLAY_START (overlay
);
2598 o_end
= OVERLAY_END (overlay
);
2599 o_beg
= OVERLAY_POSITION (o_beg
);
2600 o_end
= OVERLAY_POSITION (o_end
);
2602 redisplay_region (ob
, XINT (o_beg
), XINT (o_end
));
2605 /* Redisplay where the overlay is going to be. */
2606 redisplay_region (b
, XINT (beg
), XINT (end
));
2609 /* Redisplay the area the overlay has just left, or just enclosed. */
2613 int change_beg
, change_end
;
2615 o_beg
= OVERLAY_START (overlay
);
2616 o_end
= OVERLAY_END (overlay
);
2617 o_beg
= OVERLAY_POSITION (o_beg
);
2618 o_end
= OVERLAY_POSITION (o_end
);
2620 if (XINT (o_beg
) == XINT (beg
))
2621 redisplay_region (b
, XINT (o_end
), XINT (end
));
2622 else if (XINT (o_end
) == XINT (end
))
2623 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
2626 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
2627 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
2628 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
2632 if (!NILP (obuffer
))
2634 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
2635 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
2638 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
2639 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
2641 /* Put the overlay on the wrong list. */
2642 end
= OVERLAY_END (overlay
);
2643 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2644 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2646 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2648 /* This puts it in the right list, and in the right order. */
2649 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2651 return unbind_to (count
, overlay
);
2654 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
2655 "Delete the overlay OVERLAY from its buffer.")
2657 Lisp_Object overlay
;
2661 int count
= specpdl_ptr
- specpdl
;
2663 CHECK_OVERLAY (overlay
, 0);
2665 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2669 b
= XBUFFER (buffer
);
2671 specbind (Qinhibit_quit
, Qt
);
2673 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
2674 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
2676 redisplay_region (b
,
2677 marker_position (OVERLAY_START (overlay
)),
2678 marker_position (OVERLAY_END (overlay
)));
2680 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
2681 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
2683 return unbind_to (count
, Qnil
);
2686 /* Overlay dissection functions. */
2688 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
2689 "Return the position at which OVERLAY starts.")
2691 Lisp_Object overlay
;
2693 CHECK_OVERLAY (overlay
, 0);
2695 return (Fmarker_position (OVERLAY_START (overlay
)));
2698 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
2699 "Return the position at which OVERLAY ends.")
2701 Lisp_Object overlay
;
2703 CHECK_OVERLAY (overlay
, 0);
2705 return (Fmarker_position (OVERLAY_END (overlay
)));
2708 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
2709 "Return the buffer OVERLAY belongs to.")
2711 Lisp_Object overlay
;
2713 CHECK_OVERLAY (overlay
, 0);
2715 return Fmarker_buffer (OVERLAY_START (overlay
));
2718 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
2719 "Return a list of the properties on OVERLAY.\n\
2720 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
2723 Lisp_Object overlay
;
2725 CHECK_OVERLAY (overlay
, 0);
2727 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
2731 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
2732 "Return a list of the overlays that contain position POS.")
2737 Lisp_Object
*overlay_vec
;
2741 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2744 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2746 /* Put all the overlays we want in a vector in overlay_vec.
2747 Store the length in len. */
2748 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2749 (int *) 0, (int *) 0);
2751 /* Make a list of them all. */
2752 result
= Flist (noverlays
, overlay_vec
);
2754 xfree (overlay_vec
);
2758 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
2759 "Return a list of the overlays that overlap the region BEG ... END.\n\
2760 Overlap means that at least one character is contained within the overlay\n\
2761 and also contained within the specified region.\n\
2762 Empty overlays are included in the result if they are located at BEG\n\
2763 or between BEG and END.")
2765 Lisp_Object beg
, end
;
2768 Lisp_Object
*overlay_vec
;
2772 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
2773 CHECK_NUMBER_COERCE_MARKER (end
, 0);
2776 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2778 /* Put all the overlays we want in a vector in overlay_vec.
2779 Store the length in len. */
2780 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
2781 (int *) 0, (int *) 0);
2783 /* Make a list of them all. */
2784 result
= Flist (noverlays
, overlay_vec
);
2786 xfree (overlay_vec
);
2790 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2792 "Return the next position after POS where an overlay starts or ends.\n\
2793 If there are no more overlay boundaries after POS, return (point-max).")
2799 Lisp_Object
*overlay_vec
;
2803 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2806 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2808 /* Put all the overlays we want in a vector in overlay_vec.
2809 Store the length in len.
2810 endpos gets the position where the next overlay starts. */
2811 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2812 &endpos
, (int *) 0);
2814 /* If any of these overlays ends before endpos,
2815 use its ending point instead. */
2816 for (i
= 0; i
< noverlays
; i
++)
2821 oend
= OVERLAY_END (overlay_vec
[i
]);
2822 oendpos
= OVERLAY_POSITION (oend
);
2823 if (oendpos
< endpos
)
2827 xfree (overlay_vec
);
2828 return make_number (endpos
);
2831 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
2832 Sprevious_overlay_change
, 1, 1, 0,
2833 "Return the previous position before POS where an overlay starts or ends.\n\
2834 If there are no more overlay boundaries before POS, return (point-min).")
2840 Lisp_Object
*overlay_vec
;
2845 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2848 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2850 /* At beginning of buffer, we know the answer;
2851 avoid bug subtracting 1 below. */
2852 if (XINT (pos
) == BEGV
)
2855 /* Put all the overlays we want in a vector in overlay_vec.
2856 Store the length in len.
2857 prevpos gets the position of an overlay end. */
2858 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2859 (int *) 0, &prevpos
);
2861 /* If any of these overlays starts after prevpos,
2862 maybe use its starting point instead. */
2863 for (i
= 0; i
< noverlays
; i
++)
2868 ostart
= OVERLAY_START (overlay_vec
[i
]);
2869 ostartpos
= OVERLAY_POSITION (ostart
);
2870 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2871 prevpos
= ostartpos
;
2874 /* If any overlay ends at pos, consider its starting point too. */
2875 for (tail
= current_buffer
->overlays_before
;
2877 tail
= XCONS (tail
)->cdr
)
2879 Lisp_Object overlay
, ostart
;
2882 overlay
= XCONS (tail
)->car
;
2884 ostart
= OVERLAY_START (overlay
);
2885 ostartpos
= OVERLAY_POSITION (ostart
);
2886 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2887 prevpos
= ostartpos
;
2890 xfree (overlay_vec
);
2891 return make_number (prevpos
);
2894 /* These functions are for debugging overlays. */
2896 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2897 "Return a pair of lists giving all the overlays of the current buffer.\n\
2898 The car has all the overlays before the overlay center;\n\
2899 the cdr has all the overlays after the overlay center.\n\
2900 Recentering overlays moves overlays between these lists.\n\
2901 The lists you get are copies, so that changing them has no effect.\n\
2902 However, the overlays you get are the real objects that the buffer uses.")
2905 Lisp_Object before
, after
;
2906 before
= current_buffer
->overlays_before
;
2908 before
= Fcopy_sequence (before
);
2909 after
= current_buffer
->overlays_after
;
2911 after
= Fcopy_sequence (after
);
2913 return Fcons (before
, after
);
2916 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2917 "Recenter the overlays of the current buffer around position POS.")
2921 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2923 recenter_overlay_lists (current_buffer
, XINT (pos
));
2927 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2928 "Get the property of overlay OVERLAY with property name NAME.")
2930 Lisp_Object overlay
, prop
;
2932 Lisp_Object plist
, fallback
;
2934 CHECK_OVERLAY (overlay
, 0);
2938 for (plist
= XOVERLAY (overlay
)->plist
;
2939 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2940 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2942 if (EQ (XCONS (plist
)->car
, prop
))
2943 return XCONS (XCONS (plist
)->cdr
)->car
;
2944 else if (EQ (XCONS (plist
)->car
, Qcategory
))
2947 tem
= Fcar (Fcdr (plist
));
2949 fallback
= Fget (tem
, prop
);
2956 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2957 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2958 (overlay
, prop
, value
)
2959 Lisp_Object overlay
, prop
, value
;
2961 Lisp_Object tail
, buffer
;
2964 CHECK_OVERLAY (overlay
, 0);
2966 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2968 for (tail
= XOVERLAY (overlay
)->plist
;
2969 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2970 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2971 if (EQ (XCONS (tail
)->car
, prop
))
2973 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
2974 XCONS (XCONS (tail
)->cdr
)->car
= value
;
2977 /* It wasn't in the list, so add it to the front. */
2978 changed
= !NILP (value
);
2979 XOVERLAY (overlay
)->plist
2980 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
2982 if (! NILP (buffer
))
2985 redisplay_region (XBUFFER (buffer
),
2986 marker_position (OVERLAY_START (overlay
)),
2987 marker_position (OVERLAY_END (overlay
)));
2988 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
2989 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
2990 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
2991 Fdelete_overlay (overlay
);
2996 /* Subroutine of report_overlay_modification. */
2998 /* Lisp vector holding overlay hook functions to call.
2999 Vector elements come in pairs.
3000 Each even-index element is a list of hook functions.
3001 The following odd-index element is the overlay they came from.
3003 Before the buffer change, we fill in this vector
3004 as we call overlay hook functions.
3005 After the buffer change, we get the functions to call from this vector.
3006 This way we always call the same functions before and after the change. */
3007 static Lisp_Object last_overlay_modification_hooks
;
3009 /* Number of elements actually used in last_overlay_modification_hooks. */
3010 static int last_overlay_modification_hooks_used
;
3012 /* Add one functionlist/overlay pair
3013 to the end of last_overlay_modification_hooks. */
3016 add_overlay_mod_hooklist (functionlist
, overlay
)
3017 Lisp_Object functionlist
, overlay
;
3019 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3021 if (last_overlay_modification_hooks_used
== oldsize
)
3024 old
= last_overlay_modification_hooks
;
3025 last_overlay_modification_hooks
3026 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3027 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3028 XVECTOR (old
)->contents
,
3029 sizeof (Lisp_Object
) * oldsize
);
3031 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3032 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3035 /* Run the modification-hooks of overlays that include
3036 any part of the text in START to END.
3037 If this change is an insertion, also
3038 run the insert-before-hooks of overlay starting at END,
3039 and the insert-after-hooks of overlay ending at START.
3041 This is called both before and after the modification.
3042 AFTER is nonzero when we call after the modification.
3044 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3045 When AFTER is nonzero, they are the start position,
3046 the position after the inserted new text,
3047 and the length of deleted or replaced old text. */
3050 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3051 Lisp_Object start
, end
;
3053 Lisp_Object arg1
, arg2
, arg3
;
3055 Lisp_Object prop
, overlay
, tail
;
3056 /* 1 if this change is an insertion. */
3057 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3059 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3063 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3067 /* Call the functions recorded in last_overlay_modification_hooks
3068 rather than scanning the overlays again.
3069 First copy the vector contents, in case some of these hooks
3070 do subsequent modification of the buffer. */
3071 int size
= last_overlay_modification_hooks_used
;
3072 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3075 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3076 copy
, size
* sizeof (Lisp_Object
));
3078 gcpro1
.nvars
= size
;
3080 for (i
= 0; i
< size
;)
3082 Lisp_Object prop
, overlay
;
3084 overlay
= copy
[i
++];
3085 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3091 /* We are being called before a change.
3092 Scan the overlays to find the functions to call. */
3093 last_overlay_modification_hooks_used
= 0;
3095 for (tail
= current_buffer
->overlays_before
;
3097 tail
= XCONS (tail
)->cdr
)
3099 int startpos
, endpos
;
3100 Lisp_Object ostart
, oend
;
3102 overlay
= XCONS (tail
)->car
;
3104 ostart
= OVERLAY_START (overlay
);
3105 oend
= OVERLAY_END (overlay
);
3106 endpos
= OVERLAY_POSITION (oend
);
3107 if (XFASTINT (start
) > endpos
)
3109 startpos
= OVERLAY_POSITION (ostart
);
3110 if (insertion
&& (XFASTINT (start
) == startpos
3111 || XFASTINT (end
) == startpos
))
3113 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3116 /* Copy TAIL in case the hook recenters the overlay lists. */
3118 tail
= Fcopy_sequence (tail
);
3120 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3123 if (insertion
&& (XFASTINT (start
) == endpos
3124 || XFASTINT (end
) == endpos
))
3126 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3130 tail
= Fcopy_sequence (tail
);
3132 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3135 /* Test for intersecting intervals. This does the right thing
3136 for both insertion and deletion. */
3137 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3139 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3143 tail
= Fcopy_sequence (tail
);
3145 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3151 for (tail
= current_buffer
->overlays_after
;
3153 tail
= XCONS (tail
)->cdr
)
3155 int startpos
, endpos
;
3156 Lisp_Object ostart
, oend
;
3158 overlay
= XCONS (tail
)->car
;
3160 ostart
= OVERLAY_START (overlay
);
3161 oend
= OVERLAY_END (overlay
);
3162 startpos
= OVERLAY_POSITION (ostart
);
3163 endpos
= OVERLAY_POSITION (oend
);
3164 if (XFASTINT (end
) < startpos
)
3166 if (insertion
&& (XFASTINT (start
) == startpos
3167 || XFASTINT (end
) == startpos
))
3169 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3173 tail
= Fcopy_sequence (tail
);
3175 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3178 if (insertion
&& (XFASTINT (start
) == endpos
3179 || XFASTINT (end
) == endpos
))
3181 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3185 tail
= Fcopy_sequence (tail
);
3187 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3190 /* Test for intersecting intervals. This does the right thing
3191 for both insertion and deletion. */
3192 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3194 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3198 tail
= Fcopy_sequence (tail
);
3200 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3209 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3210 Lisp_Object list
, overlay
;
3212 Lisp_Object arg1
, arg2
, arg3
;
3214 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3216 GCPRO4 (list
, arg1
, arg2
, arg3
);
3218 add_overlay_mod_hooklist (list
, overlay
);
3220 while (!NILP (list
))
3223 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3225 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3231 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3234 evaporate_overlays (pos
)
3237 Lisp_Object tail
, overlay
, hit_list
;
3240 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3241 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3242 tail
= XCONS (tail
)->cdr
)
3245 overlay
= XCONS (tail
)->car
;
3246 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3249 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3250 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3251 hit_list
= Fcons (overlay
, hit_list
);
3254 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3255 tail
= XCONS (tail
)->cdr
)
3258 overlay
= XCONS (tail
)->car
;
3259 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3262 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3263 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3264 hit_list
= Fcons (overlay
, hit_list
);
3266 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3267 Fdelete_overlay (XCONS (hit_list
)->car
);
3270 /* Somebody has tried to store a value with an unacceptable type
3271 into the buffer-local slot with offset OFFSET. */
3273 buffer_slot_type_mismatch (offset
)
3278 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3279 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3281 case Lisp_Int
: type_name
= "integers"; break;
3282 case Lisp_String
: type_name
= "strings"; break;
3283 case Lisp_Symbol
: type_name
= "symbols"; break;
3288 error ("only %s should be stored in the buffer-local variable %s",
3289 type_name
, XSYMBOL (sym
)->name
->data
);
3294 register Lisp_Object tem
;
3296 /* Make sure all markable slots in buffer_defaults
3297 are initialized reasonably, so mark_buffer won't choke. */
3298 reset_buffer (&buffer_defaults
);
3299 reset_buffer_local_variables (&buffer_defaults
);
3300 reset_buffer (&buffer_local_symbols
);
3301 reset_buffer_local_variables (&buffer_local_symbols
);
3302 /* Prevent GC from getting confused. */
3303 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3304 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3305 #ifdef USE_TEXT_PROPERTIES
3306 BUF_INTERVALS (&buffer_defaults
) = 0;
3307 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3309 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3310 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3312 /* Set up the default values of various buffer slots. */
3313 /* Must do these before making the first buffer! */
3315 /* real setup is done in loaddefs.el */
3316 buffer_defaults
.mode_line_format
= build_string ("%-");
3317 buffer_defaults
.abbrev_mode
= Qnil
;
3318 buffer_defaults
.overwrite_mode
= Qnil
;
3319 buffer_defaults
.case_fold_search
= Qt
;
3320 buffer_defaults
.auto_fill_function
= Qnil
;
3321 buffer_defaults
.selective_display
= Qnil
;
3323 buffer_defaults
.selective_display_ellipses
= Qt
;
3325 buffer_defaults
.abbrev_table
= Qnil
;
3326 buffer_defaults
.display_table
= Qnil
;
3327 buffer_defaults
.undo_list
= Qnil
;
3328 buffer_defaults
.mark_active
= Qnil
;
3329 buffer_defaults
.file_format
= Qnil
;
3330 buffer_defaults
.overlays_before
= Qnil
;
3331 buffer_defaults
.overlays_after
= Qnil
;
3332 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3334 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3335 buffer_defaults
.truncate_lines
= Qnil
;
3336 buffer_defaults
.ctl_arrow
= Qt
;
3339 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3341 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3342 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3343 buffer_defaults
.cache_long_line_scans
= Qnil
;
3344 buffer_defaults
.file_truename
= Qnil
;
3346 /* Assign the local-flags to the slots that have default values.
3347 The local flag is a bit that is used in the buffer
3348 to say that it has its own local value for the slot.
3349 The local flag bits are in the local_var_flags slot of the buffer. */
3351 /* Nothing can work if this isn't true */
3352 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3354 /* 0 means not a lisp var, -1 means always local, else mask */
3355 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3356 XSETINT (buffer_local_flags
.filename
, -1);
3357 XSETINT (buffer_local_flags
.directory
, -1);
3358 XSETINT (buffer_local_flags
.backed_up
, -1);
3359 XSETINT (buffer_local_flags
.save_length
, -1);
3360 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3361 XSETINT (buffer_local_flags
.read_only
, -1);
3362 XSETINT (buffer_local_flags
.major_mode
, -1);
3363 XSETINT (buffer_local_flags
.mode_name
, -1);
3364 XSETINT (buffer_local_flags
.undo_list
, -1);
3365 XSETINT (buffer_local_flags
.mark_active
, -1);
3366 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3367 XSETINT (buffer_local_flags
.file_truename
, -1);
3368 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3370 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3371 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3372 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3373 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3374 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3375 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3377 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3379 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3380 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3381 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3382 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3383 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3384 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3385 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3386 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3387 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3388 XSETFASTINT (buffer_local_flags
.file_format
, 0x20000);
3390 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3393 Vbuffer_alist
= Qnil
;
3397 QSFundamental
= build_string ("Fundamental");
3399 Qfundamental_mode
= intern ("fundamental-mode");
3400 buffer_defaults
.major_mode
= Qfundamental_mode
;
3402 Qmode_class
= intern ("mode-class");
3404 Qprotected_field
= intern ("protected-field");
3406 Qpermanent_local
= intern ("permanent-local");
3408 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3410 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3411 /* super-magic invisible buffer */
3412 Vbuffer_alist
= Qnil
;
3414 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3419 char buf
[MAXPATHLEN
+1];
3421 struct stat dotstat
, pwdstat
;
3425 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3427 /* If PWD is accurate, use it instead of calling getwd. This is faster
3428 when PWD is right, and may avoid a fatal error. */
3429 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3430 && stat (pwd
, &pwdstat
) == 0
3431 && stat (".", &dotstat
) == 0
3432 && dotstat
.st_ino
== pwdstat
.st_ino
3433 && dotstat
.st_dev
== pwdstat
.st_dev
3434 && strlen (pwd
) < MAXPATHLEN
)
3436 else if (getwd (buf
) == 0)
3437 fatal ("`getwd' failed: %s\n", buf
);
3440 /* Maybe this should really use some standard subroutine
3441 whose definition is filename syntax dependent. */
3443 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3445 buf
[rc
] = DIRECTORY_SEP
;
3448 #endif /* not VMS */
3449 current_buffer
->directory
= build_string (buf
);
3451 temp
= get_minibuffer (0);
3452 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3455 /* initialize the buffer routines */
3458 extern Lisp_Object Qdisabled
;
3460 staticpro (&last_overlay_modification_hooks
);
3461 last_overlay_modification_hooks
3462 = Fmake_vector (make_number (10), Qnil
);
3464 staticpro (&Vbuffer_defaults
);
3465 staticpro (&Vbuffer_local_symbols
);
3466 staticpro (&Qfundamental_mode
);
3467 staticpro (&Qmode_class
);
3468 staticpro (&QSFundamental
);
3469 staticpro (&Vbuffer_alist
);
3470 staticpro (&Qprotected_field
);
3471 staticpro (&Qpermanent_local
);
3472 staticpro (&Qkill_buffer_hook
);
3473 staticpro (&Qoverlayp
);
3474 Qevaporate
= intern ("evaporate");
3475 staticpro (&Qevaporate
);
3476 staticpro (&Qmodification_hooks
);
3477 Qmodification_hooks
= intern ("modification-hooks");
3478 staticpro (&Qinsert_in_front_hooks
);
3479 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3480 staticpro (&Qinsert_behind_hooks
);
3481 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3482 staticpro (&Qget_file_buffer
);
3483 Qget_file_buffer
= intern ("get-file-buffer");
3484 Qpriority
= intern ("priority");
3485 staticpro (&Qpriority
);
3486 Qwindow
= intern ("window");
3487 staticpro (&Qwindow
);
3488 Qbefore_string
= intern ("before-string");
3489 staticpro (&Qbefore_string
);
3490 Qafter_string
= intern ("after-string");
3491 staticpro (&Qafter_string
);
3493 Qoverlayp
= intern ("overlayp");
3495 Fput (Qprotected_field
, Qerror_conditions
,
3496 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
3497 Fput (Qprotected_field
, Qerror_message
,
3498 build_string ("Attempt to modify a protected field"));
3500 /* All these use DEFVAR_LISP_NOPRO because the slots in
3501 buffer_defaults will all be marked via Vbuffer_defaults. */
3503 DEFVAR_LISP_NOPRO ("default-mode-line-format",
3504 &buffer_defaults
.mode_line_format
,
3505 "Default value of `mode-line-format' for buffers that don't override it.\n\
3506 This is the same as (default-value 'mode-line-format).");
3508 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
3509 &buffer_defaults
.abbrev_mode
,
3510 "Default value of `abbrev-mode' for buffers that do not override it.\n\
3511 This is the same as (default-value 'abbrev-mode).");
3513 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
3514 &buffer_defaults
.ctl_arrow
,
3515 "Default value of `ctl-arrow' for buffers that do not override it.\n\
3516 This is the same as (default-value 'ctl-arrow).");
3518 DEFVAR_LISP_NOPRO ("default-truncate-lines",
3519 &buffer_defaults
.truncate_lines
,
3520 "Default value of `truncate-lines' for buffers that do not override it.\n\
3521 This is the same as (default-value 'truncate-lines).");
3523 DEFVAR_LISP_NOPRO ("default-fill-column",
3524 &buffer_defaults
.fill_column
,
3525 "Default value of `fill-column' for buffers that do not override it.\n\
3526 This is the same as (default-value 'fill-column).");
3528 DEFVAR_LISP_NOPRO ("default-left-margin",
3529 &buffer_defaults
.left_margin
,
3530 "Default value of `left-margin' for buffers that do not override it.\n\
3531 This is the same as (default-value 'left-margin).");
3533 DEFVAR_LISP_NOPRO ("default-tab-width",
3534 &buffer_defaults
.tab_width
,
3535 "Default value of `tab-width' for buffers that do not override it.\n\
3536 This is the same as (default-value 'tab-width).");
3538 DEFVAR_LISP_NOPRO ("default-case-fold-search",
3539 &buffer_defaults
.case_fold_search
,
3540 "Default value of `case-fold-search' for buffers that don't override it.\n\
3541 This is the same as (default-value 'case-fold-search).");
3544 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
3545 &buffer_defaults
.buffer_file_type
,
3546 "Default file type for buffers that do not override it.\n\
3547 This is the same as (default-value 'buffer-file-type).\n\
3548 The file type is nil for text, t for binary.");
3551 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
3554 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
3555 But make-docfile finds it!
3556 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
3558 "Template for displaying mode line for current buffer.\n\
3559 Each buffer has its own value of this variable.\n\
3560 Value may be a string, a symbol or a list or cons cell.\n\
3561 For a symbol, its value is used (but it is ignored if t or nil).\n\
3562 A string appearing directly as the value of a symbol is processed verbatim\n\
3563 in that the %-constructs below are not recognized.\n\
3564 For a list whose car is a symbol, the symbol's value is taken,\n\
3565 and if that is non-nil, the cadr of the list is processed recursively.\n\
3566 Otherwise, the caddr of the list (if there is one) is processed.\n\
3567 For a list whose car is a string or list, each element is processed\n\
3568 recursively and the results are effectively concatenated.\n\
3569 For a list whose car is an integer, the cdr of the list is processed\n\
3570 and padded (if the number is positive) or truncated (if negative)\n\
3571 to the width specified by that number.\n\
3572 A string is printed verbatim in the mode line except for %-constructs:\n\
3573 (%-constructs are allowed when the string is the entire mode-line-format\n\
3574 or when it is found in a cons-cell or a list)\n\
3575 %b -- print buffer name. %f -- print visited file name.\n\
3576 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
3577 % means buffer is read-only and * means it is modified.\n\
3578 For a modified read-only buffer, %* gives % and %+ gives *.\n\
3579 %s -- print process status. %l -- print the current line number.\n\
3580 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
3581 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
3582 or print Bottom or All.\n\
3583 %n -- print Narrow if appropriate.\n\
3584 %t -- print T if files is text, B if binary.\n\
3585 %[ -- print one [ for each recursive editing level. %] similar.\n\
3586 %% -- print %. %- -- print infinitely many dashes.\n\
3587 Decimal digits after the % specify field width to which to pad.");
3590 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
3591 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
3592 nil here means use current buffer's major mode.");
3594 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
3595 make_number (Lisp_Symbol
),
3596 "Symbol for current buffer's major mode.");
3598 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
3599 make_number (Lisp_String
),
3600 "Pretty name of current buffer's major mode (a string).");
3602 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
3603 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
3604 Automatically becomes buffer-local when set in any fashion.");
3606 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
3608 "*Non-nil if searches should ignore case.\n\
3609 Automatically becomes buffer-local when set in any fashion.");
3611 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
3612 make_number (Lisp_Int
),
3613 "*Column beyond which automatic line-wrapping should happen.\n\
3614 Automatically becomes buffer-local when set in any fashion.");
3616 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
3617 make_number (Lisp_Int
),
3618 "*Column for the default indent-line-function to indent to.\n\
3619 Linefeed indents to this column in Fundamental mode.\n\
3620 Automatically becomes buffer-local when set in any fashion.");
3622 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
3623 make_number (Lisp_Int
),
3624 "*Distance between tab stops (for display of tab characters), in columns.\n\
3625 Automatically becomes buffer-local when set in any fashion.");
3627 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
3628 "*Non-nil means display control chars with uparrow.\n\
3629 Nil means use backslash and octal digits.\n\
3630 Automatically becomes buffer-local when set in any fashion.\n\
3631 This variable does not apply to characters whose display is specified\n\
3632 in the current display table (if there is one).");
3634 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
3635 "*Non-nil means do not display continuation lines;\n\
3636 give each line of text one screen line.\n\
3637 Automatically becomes buffer-local when set in any fashion.\n\
3639 Note that this is overridden by the variable\n\
3640 `truncate-partial-width-windows' if that variable is non-nil\n\
3641 and this buffer is not full-frame width.");
3644 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
3646 "Non-nil if the visited file is a binary file.\n\
3647 This variable is meaningful on MS-DOG and Windows NT.\n\
3648 On those systems, it is automatically local in every buffer.\n\
3649 On other systems, this variable is normally always nil.");
3652 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
3653 make_number (Lisp_String
),
3654 "Name of default directory of current buffer. Should end with slash.\n\
3655 Each buffer has its own value of this variable.");
3657 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
3659 "Function called (if non-nil) to perform auto-fill.\n\
3660 It is called after self-inserting a space at a column beyond `fill-column'.\n\
3661 Each buffer has its own value of this variable.\n\
3662 NOTE: This variable is not an ordinary hook;\n\
3663 It may not be a list of functions.");
3665 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
3666 make_number (Lisp_String
),
3667 "Name of file visited in current buffer, or nil if not visiting a file.\n\
3668 Each buffer has its own value of this variable.");
3670 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
3671 make_number (Lisp_String
),
3672 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
3673 The truename of a file is calculated by `file-truename'\n\
3674 and then abbreviated with `abbreviate-file-name'.\n\
3675 Each buffer has its own value of this variable.");
3677 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
3678 ¤t_buffer
->auto_save_file_name
,
3679 make_number (Lisp_String
),
3680 "Name of file for auto-saving current buffer,\n\
3681 or nil if buffer should not be auto-saved.\n\
3682 Each buffer has its own value of this variable.");
3684 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
3685 "Non-nil if this buffer is read-only.\n\
3686 Each buffer has its own value of this variable.");
3688 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
3689 "Non-nil if this buffer's file has been backed up.\n\
3690 Backing up is done before the first time the file is saved.\n\
3691 Each buffer has its own value of this variable.");
3693 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
3694 make_number (Lisp_Int
),
3695 "Length of current buffer when last read in, saved or auto-saved.\n\
3697 Each buffer has its own value of this variable.");
3699 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
3701 "Non-nil enables selective display:\n\
3702 Integer N as value means display only lines\n\
3703 that start with less than n columns of space.\n\
3704 A value of t means, after a ^M, all the rest of the line is invisible.\n\
3705 Then ^M's in the file are written into files as newlines.\n\n\
3706 Automatically becomes buffer-local when set in any fashion.");
3709 DEFVAR_PER_BUFFER ("selective-display-ellipses",
3710 ¤t_buffer
->selective_display_ellipses
,
3712 "t means display ... on previous line when a line is invisible.\n\
3713 Automatically becomes buffer-local when set in any fashion.");
3716 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
3717 "Non-nil if self-insertion should replace existing text.\n\
3718 The value should be one of `overwrite-mode-textual',\n\
3719 `overwrite-mode-binary', or nil.\n\
3720 If it is `overwrite-mode-textual', self-insertion still\n\
3721 inserts at the end of a line, and inserts when point is before a tab,\n\
3722 until the tab is filled in.\n\
3723 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
3724 Automatically becomes buffer-local when set in any fashion.");
3726 #if 0 /* The doc string is too long for some compilers,
3727 but make-docfile can find it in this comment. */
3728 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3730 "Display table that controls display of the contents of current buffer.\n\
3731 Automatically becomes buffer-local when set in any fashion.\n\
3732 The display table is a vector created with `make-display-table'.\n\
3733 The first 256 elements control how to display each possible text character.\n\
3734 Each value should be a vector of characters or nil;\n\
3735 nil means display the character in the default fashion.\n\
3736 The remaining six elements control the display of\n\
3737 the end of a truncated screen line (element 256, a single character);\n\
3738 the end of a continued line (element 257, a single character);\n\
3739 the escape character used to display character codes in octal\n\
3740 (element 258, a single character);\n\
3741 the character used as an arrow for control characters (element 259,\n\
3742 a single character);\n\
3743 the decoration indicating the presence of invisible lines (element 260,\n\
3744 a vector of characters);\n\
3745 the character used to draw the border between side-by-side windows\n\
3746 (element 261, a single character).\n\
3747 If this variable is nil, the value of `standard-display-table' is used.\n\
3748 Each window can have its own, overriding display table.");
3750 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3753 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
3756 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
3757 "Function to call before each text change.\n\
3758 Two arguments are passed to the function: the positions of\n\
3759 the beginning and end of the range of old text to be changed.\n\
3760 \(For an insertion, the beginning and end are at the same place.)\n\
3761 No information is given about the length of the text after the change.\n\
3763 Buffer changes made while executing the `before-change-function'\n\
3764 don't call any before-change or after-change functions.\n\
3765 That's because these variables are temporarily set to nil.\n\
3766 As a result, a hook function cannot straightforwardly alter the value of\n\
3767 these variables. See the Emacs Lisp manual for a way of\n\
3768 accomplishing an equivalent result by using other variables.");
3769 Vbefore_change_function
= Qnil
;
3771 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
3772 "Function to call after each text change.\n\
3773 Three arguments are passed to the function: the positions of\n\
3774 the beginning and end of the range of changed text,\n\
3775 and the length of the pre-change text replaced by that range.\n\
3776 \(For an insertion, the pre-change length is zero;\n\
3777 for a deletion, that length is the number of characters deleted,\n\
3778 and the post-change beginning and end are at the same place.)\n\
3780 Buffer changes made while executing the `after-change-function'\n\
3781 don't call any before-change or after-change functions.\n\
3782 That's because these variables are temporarily set to nil.\n\
3783 As a result, a hook function cannot straightforwardly alter the value of\n\
3784 these variables. See the Emacs Lisp manual for a way of\n\
3785 accomplishing an equivalent result by using other variables.");
3786 Vafter_change_function
= Qnil
;
3788 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
3789 "List of functions to call before each text change.\n\
3790 Two arguments are passed to each function: the positions of\n\
3791 the beginning and end of the range of old text to be changed.\n\
3792 \(For an insertion, the beginning and end are at the same place.)\n\
3793 No information is given about the length of the text after the change.\n\
3795 Buffer changes made while executing the `before-change-functions'\n\
3796 don't call any before-change or after-change functions.\n\
3797 That's because these variables are temporarily set to nil.\n\
3798 As a result, a hook function cannot straightforwardly alter the value of\n\
3799 these variables. See the Emacs Lisp manual for a way of\n\
3800 accomplishing an equivalent result by using other variables.");
3801 Vbefore_change_functions
= Qnil
;
3803 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
3804 "List of function to call after each text change.\n\
3805 Three arguments are passed to each function: the positions of\n\
3806 the beginning and end of the range of changed text,\n\
3807 and the length of the pre-change text replaced by that range.\n\
3808 \(For an insertion, the pre-change length is zero;\n\
3809 for a deletion, that length is the number of characters deleted,\n\
3810 and the post-change beginning and end are at the same place.)\n\
3812 Buffer changes made while executing the `after-change-functions'\n\
3813 don't call any before-change or after-change functions.\n\
3814 That's because these variables are temporarily set to nil.\n\
3815 As a result, a hook function cannot straightforwardly alter the value of\n\
3816 these variables. See the Emacs Lisp manual for a way of\n\
3817 accomplishing an equivalent result by using other variables.");
3819 Vafter_change_functions
= Qnil
;
3821 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
3822 "A list of functions to call before changing a buffer which is unmodified.\n\
3823 The functions are run using the `run-hooks' function.");
3824 Vfirst_change_hook
= Qnil
;
3825 Qfirst_change_hook
= intern ("first-change-hook");
3826 staticpro (&Qfirst_change_hook
);
3828 #if 0 /* The doc string is too long for some compilers,
3829 but make-docfile can find it in this comment. */
3830 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3831 "List of undo entries in current buffer.\n\
3832 Recent changes come first; older changes follow newer.\n\
3834 An entry (BEG . END) represents an insertion which begins at\n\
3835 position BEG and ends at position END.\n\
3837 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
3838 from (abs POSITION). If POSITION is positive, point was at the front\n\
3839 of the text being deleted; if negative, point was at the end.\n\
3841 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
3842 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
3843 of the visited file's modification time, as of that time. If the\n\
3844 modification time of the most recent save is different, this entry is\n\
3847 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
3848 was modified between BEG and END. PROPERTY is the property name,\n\
3849 and VALUE is the old value.\n\
3851 An entry of the form POSITION indicates that point was at the buffer\n\
3852 location given by the integer. Undoing an entry of this form places\n\
3853 point at POSITION.\n\
3855 nil marks undo boundaries. The undo command treats the changes\n\
3856 between two undo boundaries as a single step to be undone.\n\
3858 If the value of the variable is t, undo information is not recorded.");
3860 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3863 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
3864 "Non-nil means the mark and region are currently active in this buffer.\n\
3865 Automatically local in all buffers.");
3867 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
3868 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
3869 This variable is buffer-local, in all buffers.\n\
3871 Normally, the line-motion functions work by scanning the buffer for\n\
3872 newlines. Columnar operations (like move-to-column and\n\
3873 compute-motion) also work by scanning the buffer, summing character\n\
3874 widths as they go. This works well for ordinary text, but if the\n\
3875 buffer's lines are very long (say, more than 500 characters), these\n\
3876 motion functions will take longer to execute. Emacs may also take\n\
3877 longer to update the display.\n\
3879 If cache-long-line-scans is non-nil, these motion functions cache the\n\
3880 results of their scans, and consult the cache to avoid rescanning\n\
3881 regions of the buffer until the text is modified. The caches are most\n\
3882 beneficial when they prevent the most searching---that is, when the\n\
3883 buffer contains long lines and large regions of characters with the\n\
3884 same, fixed screen width.\n\
3886 When cache-long-line-scans is non-nil, processing short lines will\n\
3887 become slightly slower (because of the overhead of consulting the\n\
3888 cache), and the caches will use memory roughly proportional to the\n\
3889 number of newlines and characters whose screen width varies.\n\
3891 The caches require no explicit maintenance; their accuracy is\n\
3892 maintained internally by the Emacs primitives. Enabling or disabling\n\
3893 the cache should not affect the behavior of any of the motion\n\
3894 functions; it should only affect their performance.");
3896 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
3897 "Value of point before the last series of scroll operations, or nil.");
3899 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
3900 "List of formats to use when saving this buffer.\n\
3901 Formats are defined by `format-alist'. This variable is\n\
3902 set when a file is visited. Automatically local in all buffers.");
3904 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
3905 ¤t_buffer
->invisibility_spec
, Qnil
,
3906 "Invisibility spec of this buffer.\n\
3907 The default is t, which means that text is invisible\n\
3908 if it has a non-nil `invisible' property.\n\
3909 If the value is a list, a text character is invisible if its `invisible'\n\
3910 property is an element in that list.\n\
3911 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
3912 then characters with property value PROP are invisible,\n\
3913 and they have an ellipsis as well if ELLIPSIS is non-nil.");
3915 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
3916 "*Non-nil means deactivate the mark when the buffer contents change.");
3917 Vtransient_mark_mode
= Qnil
;
3919 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
3920 "*Non-nil means disregard read-only status of buffers or characters.\n\
3921 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
3922 text properties. If the value is a list, disregard `buffer-read-only'\n\
3923 and disregard a `read-only' text property if the property value\n\
3924 is a member of the list.");
3925 Vinhibit_read_only
= Qnil
;
3927 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
3928 "List of functions called with no args to query before killing a buffer.");
3929 Vkill_buffer_query_functions
= Qnil
;
3931 defsubr (&Sbuffer_list
);
3932 defsubr (&Sget_buffer
);
3933 defsubr (&Sget_file_buffer
);
3934 defsubr (&Sget_buffer_create
);
3935 defsubr (&Smake_indirect_buffer
);
3936 defsubr (&Sgenerate_new_buffer_name
);
3937 defsubr (&Sbuffer_name
);
3938 /*defsubr (&Sbuffer_number);*/
3939 defsubr (&Sbuffer_file_name
);
3940 defsubr (&Sbuffer_base_buffer
);
3941 defsubr (&Sbuffer_local_variables
);
3942 defsubr (&Sbuffer_modified_p
);
3943 defsubr (&Sset_buffer_modified_p
);
3944 defsubr (&Sbuffer_modified_tick
);
3945 defsubr (&Srename_buffer
);
3946 defsubr (&Sother_buffer
);
3947 defsubr (&Sbuffer_disable_undo
);
3948 defsubr (&Sbuffer_enable_undo
);
3949 defsubr (&Skill_buffer
);
3950 defsubr (&Serase_buffer
);
3951 defsubr (&Sset_buffer_major_mode
);
3952 defsubr (&Sswitch_to_buffer
);
3953 defsubr (&Spop_to_buffer
);
3954 defsubr (&Scurrent_buffer
);
3955 defsubr (&Sset_buffer
);
3956 defsubr (&Sbarf_if_buffer_read_only
);
3957 defsubr (&Sbury_buffer
);
3958 defsubr (&Skill_all_local_variables
);
3960 defsubr (&Soverlayp
);
3961 defsubr (&Smake_overlay
);
3962 defsubr (&Sdelete_overlay
);
3963 defsubr (&Smove_overlay
);
3964 defsubr (&Soverlay_start
);
3965 defsubr (&Soverlay_end
);
3966 defsubr (&Soverlay_buffer
);
3967 defsubr (&Soverlay_properties
);
3968 defsubr (&Soverlays_at
);
3969 defsubr (&Soverlays_in
);
3970 defsubr (&Snext_overlay_change
);
3971 defsubr (&Sprevious_overlay_change
);
3972 defsubr (&Soverlay_recenter
);
3973 defsubr (&Soverlay_lists
);
3974 defsubr (&Soverlay_get
);
3975 defsubr (&Soverlay_put
);
3980 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
3981 initial_define_key (control_x_map
, 'k', "kill-buffer");
3983 /* This must not be in syms_of_buffer, because Qdisabled is not
3984 initialized when that function gets called. */
3985 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);