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, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
25 #include <sys/param.h>
28 /* in 4.1, param.h fails to define this. */
29 #define MAXPATHLEN 1024
30 #endif /* not MAXPATHLEN */
34 #include "intervals.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
42 struct buffer
*current_buffer
; /* the current buffer */
44 /* First buffer in chain of all buffers (in reverse order of creation).
45 Threaded through ->next. */
47 struct buffer
*all_buffers
;
49 /* This structure holds the default values of the buffer-local variables
50 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
51 The default value occupies the same slot in this structure
52 as an individual buffer's value occupies in that buffer.
53 Setting the default value also goes through the alist of buffers
54 and stores into each buffer that does not say it has a local value. */
56 struct buffer buffer_defaults
;
58 /* A Lisp_Object pointer to the above, used for staticpro */
60 static Lisp_Object Vbuffer_defaults
;
62 /* This structure marks which slots in a buffer have corresponding
63 default values in buffer_defaults.
64 Each such slot has a nonzero value in this structure.
65 The value has only one nonzero bit.
67 When a buffer has its own local value for a slot,
68 the bit for that slot (found in the same slot in this structure)
69 is turned on in the buffer's local_var_flags slot.
71 If a slot in this structure is -1, then even though there may
72 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
73 and the corresponding slot in buffer_defaults is not used.
75 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
76 but there is a default value which is copied into each buffer.
78 If a slot in this structure is negative, then even though there may
79 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
80 and the corresponding slot in buffer_defaults is not used.
82 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
83 zero, that is a bug */
85 struct buffer buffer_local_flags
;
87 /* This structure holds the names of symbols whose values may be
88 buffer-local. It is indexed and accessed in the same way as the above. */
90 struct buffer buffer_local_symbols
;
91 /* A Lisp_Object pointer to the above, used for staticpro */
92 static Lisp_Object Vbuffer_local_symbols
;
94 /* This structure holds the required types for the values in the
95 buffer-local slots. If a slot contains Qnil, then the
96 corresponding buffer slot may contain a value of any type. If a
97 slot contains an integer, then prospective values' tags must be
98 equal to that integer. When a tag does not match, the function
99 buffer_slot_type_mismatch will signal an error. */
100 struct buffer buffer_local_types
;
102 Lisp_Object
Fset_buffer ();
103 void set_buffer_internal ();
104 void set_buffer_internal_1 ();
105 static void call_overlay_mod_hooks ();
106 static void swap_out_buffer_local_variables ();
108 /* Alist of all buffer names vs the buffers. */
109 /* This used to be a variable, but is no longer,
110 to prevent lossage due to user rplac'ing this alist or its elements. */
111 Lisp_Object Vbuffer_alist
;
113 /* Functions to call before and after each text change. */
114 Lisp_Object Vbefore_change_function
;
115 Lisp_Object Vafter_change_function
;
116 Lisp_Object Vbefore_change_functions
;
117 Lisp_Object Vafter_change_functions
;
119 Lisp_Object Vtransient_mark_mode
;
121 /* t means ignore all read-only text properties.
122 A list means ignore such a property if its value is a member of the list.
123 Any non-nil value means ignore buffer-read-only. */
124 Lisp_Object Vinhibit_read_only
;
126 /* List of functions to call that can query about killing a buffer.
127 If any of these functions returns nil, we don't kill it. */
128 Lisp_Object Vkill_buffer_query_functions
;
130 /* List of functions to call before changing an unmodified buffer. */
131 Lisp_Object Vfirst_change_hook
;
133 Lisp_Object Qfirst_change_hook
;
134 Lisp_Object Qbefore_change_functions
;
135 Lisp_Object Qafter_change_functions
;
137 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
139 Lisp_Object Qprotected_field
;
141 Lisp_Object QSFundamental
; /* A string "Fundamental" */
143 Lisp_Object Qkill_buffer_hook
;
145 Lisp_Object Qget_file_buffer
;
147 Lisp_Object Qoverlayp
;
149 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
151 Lisp_Object Qmodification_hooks
;
152 Lisp_Object Qinsert_in_front_hooks
;
153 Lisp_Object Qinsert_behind_hooks
;
155 /* For debugging; temporary. See set_buffer_internal. */
156 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
162 error ("No buffer named %s", XSTRING (spec
)->data
);
163 error ("Invalid buffer argument");
166 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
167 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
168 Value is nil if OBJECT is not a buffer or if it has been killed.")
172 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
176 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
177 "Return a list of all existing live buffers.")
180 return Fmapcar (Qcdr
, Vbuffer_alist
);
183 /* Like Fassoc, but use Fstring_equal to compare
184 (which ignores text properties),
185 and don't ever QUIT. */
188 assoc_ignore_text_properties (key
, list
)
189 register Lisp_Object key
;
192 register Lisp_Object tail
;
193 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
195 register Lisp_Object elt
, tem
;
197 tem
= Fstring_equal (Fcar (elt
), key
);
204 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
205 "Return the buffer named NAME (a string).\n\
206 If there is no live buffer named NAME, return nil.\n\
207 NAME may also be a buffer; if so, the value is that buffer.")
209 register Lisp_Object name
;
213 CHECK_STRING (name
, 0);
215 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
218 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
219 "Return the buffer visiting file FILENAME (a string).\n\
220 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
221 If there is no such live buffer, return nil.\n\
222 See also `find-buffer-visiting'.")
224 register Lisp_Object filename
;
226 register Lisp_Object tail
, buf
, tem
;
229 CHECK_STRING (filename
, 0);
230 filename
= Fexpand_file_name (filename
, Qnil
);
232 /* If the file name has special constructs in it,
233 call the corresponding file handler. */
234 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
236 return call2 (handler
, Qget_file_buffer
, filename
);
238 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
240 buf
= Fcdr (XCONS (tail
)->car
);
241 if (!BUFFERP (buf
)) continue;
242 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
243 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
251 get_truename_buffer (filename
)
252 register Lisp_Object filename
;
254 register Lisp_Object tail
, buf
, tem
;
256 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
258 buf
= Fcdr (XCONS (tail
)->car
);
259 if (!BUFFERP (buf
)) continue;
260 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
261 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
268 /* Incremented for each buffer created, to assign the buffer number. */
271 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
272 "Return the buffer named NAME, or create such a buffer and return it.\n\
273 A new buffer is created if there is no live buffer named NAME.\n\
274 If NAME starts with a space, the new buffer does not keep undo information.\n\
275 If NAME is a buffer instead of a string, then it is the value returned.\n\
276 The value is never nil.")
278 register Lisp_Object name
;
280 register Lisp_Object buf
;
281 register struct buffer
*b
;
283 buf
= Fget_buffer (name
);
287 if (XSTRING (name
)->size
== 0)
288 error ("Empty string for buffer name is not allowed");
290 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
292 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
294 /* An ordinary buffer uses its own struct buffer_text. */
295 b
->text
= &b
->own_text
;
298 BUF_GAP_SIZE (b
) = 20;
300 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
302 if (! BUF_BEG_ADDR (b
))
303 buffer_memory_full ();
311 BUF_SAVE_MODIFF (b
) = 1;
312 BUF_INTERVALS (b
) = 0;
314 b
->newline_cache
= 0;
315 b
->width_run_cache
= 0;
316 b
->width_table
= Qnil
;
318 /* Put this on the chain of all buffers including killed ones. */
319 b
->next
= all_buffers
;
322 /* An ordinary buffer normally doesn't need markers
323 to handle BEGV and ZV. */
325 b
->begv_marker
= Qnil
;
328 name
= Fcopy_sequence (name
);
329 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
332 if (XSTRING (name
)->data
[0] != ' ')
338 reset_buffer_local_variables (b
);
340 /* Put this in the alist of all live buffers. */
342 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
344 b
->mark
= Fmake_marker ();
345 BUF_MARKERS (b
) = Qnil
;
350 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
351 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
352 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
353 BASE-BUFFER should be an existing buffer (or buffer name).\n\
354 NAME should be a string which is not the name of an existing buffer.")
356 register Lisp_Object base_buffer
, name
;
358 register Lisp_Object buf
;
359 register struct buffer
*b
;
361 buf
= Fget_buffer (name
);
363 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
365 base_buffer
= Fget_buffer (base_buffer
);
366 if (NILP (base_buffer
))
367 error ("No such buffer: `%s'",
368 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
370 if (XSTRING (name
)->size
== 0)
371 error ("Empty string for buffer name is not allowed");
373 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
375 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
377 if (XBUFFER (base_buffer
)->base_buffer
)
378 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
380 b
->base_buffer
= XBUFFER (base_buffer
);
382 /* Use the base buffer's text object. */
383 b
->text
= b
->base_buffer
->text
;
385 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
386 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
387 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
389 b
->newline_cache
= 0;
390 b
->width_run_cache
= 0;
391 b
->width_table
= Qnil
;
393 /* Put this on the chain of all buffers including killed ones. */
394 b
->next
= all_buffers
;
397 name
= Fcopy_sequence (name
);
398 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
402 reset_buffer_local_variables (b
);
404 /* Put this in the alist of all live buffers. */
406 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
408 b
->mark
= Fmake_marker ();
411 /* Make sure the base buffer has markers for its narrowing. */
412 if (NILP (b
->base_buffer
->pt_marker
))
414 b
->base_buffer
->pt_marker
= Fmake_marker ();
415 Fset_marker (b
->base_buffer
->pt_marker
,
416 make_number (BUF_PT (b
->base_buffer
)), base_buffer
);
418 if (NILP (b
->base_buffer
->begv_marker
))
420 b
->base_buffer
->begv_marker
= Fmake_marker ();
421 Fset_marker (b
->base_buffer
->begv_marker
,
422 make_number (BUF_BEGV (b
->base_buffer
)), base_buffer
);
424 if (NILP (b
->base_buffer
->zv_marker
))
426 b
->base_buffer
->zv_marker
= Fmake_marker ();
427 Fset_marker (b
->base_buffer
->zv_marker
,
428 make_number (BUF_ZV (b
->base_buffer
)), base_buffer
);
429 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
432 /* Give the indirect buffer markers for its narrowing. */
433 b
->pt_marker
= Fmake_marker ();
434 Fset_marker (b
->pt_marker
, make_number (BUF_PT (b
)), buf
);
435 b
->begv_marker
= Fmake_marker ();
436 Fset_marker (b
->begv_marker
, make_number (BUF_BEGV (b
)), buf
);
437 b
->zv_marker
= Fmake_marker ();
438 Fset_marker (b
->zv_marker
, make_number (BUF_ZV (b
)), buf
);
440 XMARKER (b
->zv_marker
)->insertion_type
= 1;
445 /* Reinitialize everything about a buffer except its name and contents
446 and local variables. */
450 register struct buffer
*b
;
453 b
->file_truename
= Qnil
;
454 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
456 XSETFASTINT (b
->save_length
, 0);
457 b
->last_window_start
= 1;
459 b
->auto_save_modified
= 0;
460 b
->auto_save_failure_time
= -1;
461 b
->auto_save_file_name
= Qnil
;
463 b
->overlays_before
= Qnil
;
464 b
->overlays_after
= Qnil
;
465 XSETFASTINT (b
->overlay_center
, 1);
466 b
->mark_active
= Qnil
;
467 b
->point_before_scroll
= Qnil
;
468 b
->file_format
= Qnil
;
474 /* Reset buffer B's local variables info.
475 Don't use this on a buffer that has already been in use;
476 it does not treat permanent locals consistently.
477 Instead, use Fkill_all_local_variables. */
479 reset_buffer_local_variables (b
)
480 register struct buffer
*b
;
484 /* Reset the major mode to Fundamental, together with all the
485 things that depend on the major mode.
486 default-major-mode is handled at a higher level.
487 We ignore it here. */
488 b
->major_mode
= Qfundamental_mode
;
490 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
491 b
->mode_name
= QSFundamental
;
492 b
->minor_modes
= Qnil
;
494 /* If the standard case table has been altered and invalidated,
495 fix up its insides first. */
496 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
497 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
498 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
499 Fset_standard_case_table (Vascii_downcase_table
);
501 b
->downcase_table
= Vascii_downcase_table
;
502 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
503 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
504 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
505 b
->buffer_file_type
= Qnil
;
506 b
->invisibility_spec
= Qt
;
509 b
->sort_table
= XSTRING (Vascii_sort_table
);
510 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
513 /* Reset all per-buffer variables to their defaults. */
514 b
->local_var_alist
= Qnil
;
515 b
->local_var_flags
= 0;
517 /* For each slot that has a default value,
518 copy that into the slot. */
520 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
521 offset
< sizeof (struct buffer
);
522 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
524 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
525 if (flag
> 0 || flag
== -2)
526 *(Lisp_Object
*)(offset
+ (char *)b
) =
527 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
531 /* We split this away from generate-new-buffer, because rename-buffer
532 and set-visited-file-name ought to be able to use this to really
533 rename the buffer properly. */
535 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
537 "Return a string that is the name of no existing buffer based on NAME.\n\
538 If there is no live buffer named NAME, then return NAME.\n\
539 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
540 until an unused name is found, and then return that name.\n\
541 Optional second argument IGNORE specifies a name that is okay to use\n\
542 \(if it is in the sequence to be tried)\n\
543 even if a buffer with that name exists.")
545 register Lisp_Object name
, ignore
;
547 register Lisp_Object gentemp
, tem
;
551 CHECK_STRING (name
, 0);
553 tem
= Fget_buffer (name
);
560 sprintf (number
, "<%d>", ++count
);
561 gentemp
= concat2 (name
, build_string (number
));
562 tem
= Fstring_equal (gentemp
, ignore
);
565 tem
= Fget_buffer (gentemp
);
572 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
573 "Return the name of BUFFER, as a string.\n\
574 With no argument or nil as argument, return the name of the current buffer.")
576 register Lisp_Object buffer
;
579 return current_buffer
->name
;
580 CHECK_BUFFER (buffer
, 0);
581 return XBUFFER (buffer
)->name
;
584 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
585 "Return name of file BUFFER is visiting, or nil if none.\n\
586 No argument or nil as argument means use the current buffer.")
588 register Lisp_Object buffer
;
591 return current_buffer
->filename
;
592 CHECK_BUFFER (buffer
, 0);
593 return XBUFFER (buffer
)->filename
;
596 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
598 "Return the base buffer of indirect buffer BUFFER.\n\
599 If BUFFER is not indirect, return nil.")
601 register Lisp_Object buffer
;
604 Lisp_Object base_buffer
;
607 base
= current_buffer
->base_buffer
;
610 CHECK_BUFFER (buffer
, 0);
611 base
= XBUFFER (buffer
)->base_buffer
;
616 XSETBUFFER (base_buffer
, base
);
620 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
621 Sbuffer_local_variables
, 0, 1, 0,
622 "Return an alist of variables that are buffer-local in BUFFER.\n\
623 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
624 For a symbol that is locally unbound, just the symbol appears in the value.\n\
625 Note that storing new VALUEs in these elements doesn't change the variables.\n\
626 No argument or nil as argument means use current buffer as BUFFER.")
628 register Lisp_Object buffer
;
630 register struct buffer
*buf
;
631 register Lisp_Object result
;
634 buf
= current_buffer
;
637 CHECK_BUFFER (buffer
, 0);
638 buf
= XBUFFER (buffer
);
644 register Lisp_Object tail
;
645 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
647 Lisp_Object val
, elt
;
649 elt
= XCONS (tail
)->car
;
651 /* Reference each variable in the alist in buf.
652 If inquiring about the current buffer, this gets the current values,
653 so store them into the alist so the alist is up to date.
654 If inquiring about some other buffer, this swaps out any values
655 for that buffer, making the alist up to date automatically. */
656 val
= find_symbol_value (XCONS (elt
)->car
);
657 /* Use the current buffer value only if buf is the current buffer. */
658 if (buf
!= current_buffer
)
659 val
= XCONS (elt
)->cdr
;
661 /* If symbol is unbound, put just the symbol in the list. */
662 if (EQ (val
, Qunbound
))
663 result
= Fcons (XCONS (elt
)->car
, result
);
664 /* Otherwise, put (symbol . value) in the list. */
666 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
670 /* Add on all the variables stored in special slots. */
672 register int offset
, mask
;
674 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
675 offset
< sizeof (struct buffer
);
676 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
678 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
679 if (mask
== -1 || (buf
->local_var_flags
& mask
))
680 if (SYMBOLP (*(Lisp_Object
*)(offset
681 + (char *)&buffer_local_symbols
)))
682 result
= Fcons (Fcons (*((Lisp_Object
*)
683 (offset
+ (char *)&buffer_local_symbols
)),
684 *(Lisp_Object
*)(offset
+ (char *)buf
)),
693 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
695 "Return t if BUFFER was modified since its file was last read or saved.\n\
696 No argument or nil as argument means use current buffer as BUFFER.")
698 register Lisp_Object buffer
;
700 register struct buffer
*buf
;
702 buf
= current_buffer
;
705 CHECK_BUFFER (buffer
, 0);
706 buf
= XBUFFER (buffer
);
709 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
712 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
714 "Mark current buffer as modified or unmodified according to FLAG.\n\
715 A non-nil FLAG means mark the buffer modified.")
717 register Lisp_Object flag
;
719 register int already
;
720 register Lisp_Object fn
;
722 #ifdef CLASH_DETECTION
723 /* If buffer becoming modified, lock the file.
724 If buffer becoming unmodified, unlock the file. */
726 fn
= current_buffer
->file_truename
;
729 already
= SAVE_MODIFF
< MODIFF
;
730 if (!already
&& !NILP (flag
))
732 else if (already
&& NILP (flag
))
735 #endif /* CLASH_DETECTION */
737 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
742 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
744 "Return BUFFER's tick counter, incremented for each change in text.\n\
745 Each buffer has a tick counter which is incremented each time the text in\n\
746 that buffer is changed. It wraps around occasionally.\n\
747 No argument or nil as argument means use current buffer as BUFFER.")
749 register Lisp_Object buffer
;
751 register struct buffer
*buf
;
753 buf
= current_buffer
;
756 CHECK_BUFFER (buffer
, 0);
757 buf
= XBUFFER (buffer
);
760 return make_number (BUF_MODIFF (buf
));
763 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
764 "sRename buffer (to new name): \nP",
765 "Change current buffer's name to NEWNAME (a string).\n\
766 If second arg UNIQUE is nil or omitted, it is an error if a\n\
767 buffer named NEWNAME already exists.\n\
768 If UNIQUE is non-nil, come up with a new name using\n\
769 `generate-new-buffer-name'.\n\
770 Interactively, you can set UNIQUE with a prefix argument.\n\
771 We return the name we actually gave the buffer.\n\
772 This does not change the name of the visited file (if any).")
774 register Lisp_Object newname
, unique
;
776 register Lisp_Object tem
, buf
;
778 CHECK_STRING (newname
, 0);
780 if (XSTRING (newname
)->size
== 0)
781 error ("Empty string is invalid as a buffer name");
783 tem
= Fget_buffer (newname
);
784 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
785 the buffer automatically so you can create another with the original name.
786 It makes UNIQUE equivalent to
787 (rename-buffer (generate-new-buffer-name NEWNAME)). */
788 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
789 return current_buffer
->name
;
793 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
795 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
798 current_buffer
->name
= newname
;
800 /* Catch redisplay's attention. Unless we do this, the mode lines for
801 any windows displaying current_buffer will stay unchanged. */
804 XSETBUFFER (buf
, current_buffer
);
805 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
806 if (NILP (current_buffer
->filename
)
807 && !NILP (current_buffer
->auto_save_file_name
))
808 call0 (intern ("rename-auto-save-file"));
809 /* Refetch since that last call may have done GC. */
810 return current_buffer
->name
;
813 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
814 "Return most recently selected buffer other than BUFFER.\n\
815 Buffers not visible in windows are preferred to visible buffers,\n\
816 unless optional second argument VISIBLE-OK is non-nil.\n\
817 If no other buffer exists, the buffer `*scratch*' is returned.\n\
818 If BUFFER is omitted or nil, some interesting buffer is returned.")
820 register Lisp_Object buffer
, visible_ok
;
822 Lisp_Object
Fset_buffer_major_mode ();
823 register Lisp_Object tail
, buf
, notsogood
, tem
;
826 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
828 buf
= Fcdr (Fcar (tail
));
829 if (EQ (buf
, buffer
))
831 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
834 /* If the selected frame has a buffer_predicate,
835 disregard buffers that don't fit the predicate. */
836 tem
= frame_buffer_predicate ();
839 tem
= call1 (tem
, buf
);
845 if (NILP (visible_ok
))
846 tem
= Fget_buffer_window (buf
, Qt
);
851 if (NILP (notsogood
))
854 if (!NILP (notsogood
))
856 buf
= Fget_buffer_create (build_string ("*scratch*"));
857 Fset_buffer_major_mode (buf
);
861 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
863 "Make BUFFER stop keeping undo information.\n\
864 No argument or nil as argument means do this for the current buffer.")
866 register Lisp_Object buffer
;
868 Lisp_Object real_buffer
;
871 XSETBUFFER (real_buffer
, current_buffer
);
874 real_buffer
= Fget_buffer (buffer
);
875 if (NILP (real_buffer
))
879 XBUFFER (real_buffer
)->undo_list
= Qt
;
884 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
886 "Start keeping undo information for buffer BUFFER.\n\
887 No argument or nil as argument means do this for the current buffer.")
889 register Lisp_Object buffer
;
891 Lisp_Object real_buffer
;
894 XSETBUFFER (real_buffer
, current_buffer
);
897 real_buffer
= Fget_buffer (buffer
);
898 if (NILP (real_buffer
))
902 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
903 XBUFFER (real_buffer
)->undo_list
= Qnil
;
909 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
910 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
911 The buffer being killed will be current while the hook is running.\n\
914 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
915 "Kill the buffer BUFFER.\n\
916 The argument may be a buffer or may be the name of a buffer.\n\
917 An argument of nil means kill the current buffer.\n\n\
918 Value is t if the buffer is actually killed, nil if user says no.\n\n\
919 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
920 if not void, is a list of functions to be called, with no arguments,\n\
921 before the buffer is actually killed. The buffer to be killed is current\n\
922 when the hook functions are called.\n\n\
923 Any processes that have this buffer as the `process-buffer' are killed\n\
924 with `delete-process'.")
929 register struct buffer
*b
;
930 register Lisp_Object tem
;
931 register struct Lisp_Marker
*m
;
932 struct gcpro gcpro1
, gcpro2
;
935 buf
= Fcurrent_buffer ();
937 buf
= Fget_buffer (buffer
);
943 /* Avoid trouble for buffer already dead. */
947 /* Query if the buffer is still modified. */
948 if (INTERACTIVE
&& !NILP (b
->filename
)
949 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
952 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
953 XSTRING (b
->name
)->data
));
959 /* Run hooks with the buffer to be killed the current buffer. */
961 register Lisp_Object val
;
962 int count
= specpdl_ptr
- specpdl
;
965 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
966 set_buffer_internal (b
);
968 /* First run the query functions; if any query is answered no,
969 don't kill the buffer. */
970 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
972 tem
= call0 (Fcar (list
));
974 return unbind_to (count
, Qnil
);
977 /* Then run the hooks. */
978 if (!NILP (Vrun_hooks
))
979 call1 (Vrun_hooks
, Qkill_buffer_hook
);
980 unbind_to (count
, Qnil
);
983 /* We have no more questions to ask. Verify that it is valid
984 to kill the buffer. This must be done after the questions
985 since anything can happen within do_yes_or_no_p. */
987 /* Don't kill the minibuffer now current. */
988 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
994 /* When we kill a base buffer, kill all its indirect buffers.
995 We do it at this stage so nothing terrible happens if they
996 ask questions or their hooks get errors. */
997 if (! b
->base_buffer
)
999 struct buffer
*other
;
1003 for (other
= all_buffers
; other
; other
= other
->next
)
1004 /* all_buffers contains dead buffers too;
1005 don't re-kill them. */
1006 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1009 XSETBUFFER (buf
, other
);
1016 /* Make this buffer not be current.
1017 In the process, notice if this is the sole visible buffer
1018 and give up if so. */
1019 if (b
== current_buffer
)
1021 tem
= Fother_buffer (buf
, Qnil
);
1023 if (b
== current_buffer
)
1027 /* Now there is no question: we can kill the buffer. */
1029 #ifdef CLASH_DETECTION
1030 /* Unlock this buffer's file, if it is locked. */
1032 #endif /* CLASH_DETECTION */
1034 kill_buffer_processes (buf
);
1036 tem
= Vinhibit_quit
;
1038 replace_buffer_in_all_windows (buf
);
1039 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1040 Vinhibit_quit
= tem
;
1042 /* Delete any auto-save file, if we saved it in this session. */
1043 if (STRINGP (b
->auto_save_file_name
)
1044 && b
->auto_save_modified
!= 0
1045 && SAVE_MODIFF
< b
->auto_save_modified
)
1048 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1050 internal_delete_file (b
->auto_save_file_name
);
1055 /* Unchain all markers that belong to this indirect buffer.
1056 Don't unchain the markers that belong to the base buffer
1057 or its other indirect buffers. */
1058 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1064 unchain_marker (tem
);
1070 /* Unchain all markers of this buffer and its indirect buffers.
1071 and leave them pointing nowhere. */
1072 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1079 BUF_MARKERS (b
) = Qnil
;
1081 #ifdef USE_TEXT_PROPERTIES
1082 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1085 /* Perhaps we should explicitly free the interval tree here... */
1088 /* Reset the local variables, so that this buffer's local values
1089 won't be protected from GC. They would be protected
1090 if they happened to remain encached in their symbols.
1091 This gets rid of them for certain. */
1092 swap_out_buffer_local_variables (b
);
1093 reset_buffer_local_variables (b
);
1098 if (! b
->base_buffer
)
1099 BUFFER_FREE (BUF_BEG_ADDR (b
));
1101 if (b
->newline_cache
)
1103 free_region_cache (b
->newline_cache
);
1104 b
->newline_cache
= 0;
1106 if (b
->width_run_cache
)
1108 free_region_cache (b
->width_run_cache
);
1109 b
->width_run_cache
= 0;
1111 b
->width_table
= Qnil
;
1113 b
->undo_list
= Qnil
;
1118 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1119 we do this each time BUF is selected visibly, the more recently
1120 selected buffers are always closer to the front of the list. This
1121 means that other_buffer is more likely to choose a relevant buffer. */
1126 register Lisp_Object link
, prev
;
1129 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1131 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1136 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1137 we cannot use Fdelq itself here because it allows quitting. */
1140 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1142 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1144 XCONS(link
)->cdr
= Vbuffer_alist
;
1145 Vbuffer_alist
= link
;
1148 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1149 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1150 Use this function before selecting the buffer, since it may need to inspect\n\
1151 the current buffer's major mode.")
1156 Lisp_Object function
;
1158 function
= buffer_defaults
.major_mode
;
1159 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1160 function
= current_buffer
->major_mode
;
1162 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1165 count
= specpdl_ptr
- specpdl
;
1167 /* To select a nonfundamental mode,
1168 select the buffer temporarily and then call the mode function. */
1170 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1172 Fset_buffer (buffer
);
1175 return unbind_to (count
, Qnil
);
1178 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1179 "Select buffer BUFFER in the current window.\n\
1180 BUFFER may be a buffer or a buffer name.\n\
1181 Optional second arg NORECORD non-nil means\n\
1182 do not put this buffer at the front of the list of recently selected ones.\n\
1184 WARNING: This is NOT the way to work on another buffer temporarily\n\
1185 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1186 the window-buffer correspondences.")
1188 Lisp_Object buffer
, norecord
;
1190 register Lisp_Object buf
;
1193 if (EQ (minibuf_window
, selected_window
))
1194 error ("Cannot switch buffers in minibuffer window");
1195 tem
= Fwindow_dedicated_p (selected_window
);
1197 error ("Cannot switch buffers in a dedicated window");
1200 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1203 buf
= Fget_buffer (buffer
);
1206 buf
= Fget_buffer_create (buffer
);
1207 Fset_buffer_major_mode (buf
);
1211 if (NILP (norecord
))
1212 record_buffer (buf
);
1214 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1215 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1222 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
1223 "Select buffer BUFFER in some window, preferably a different one.\n\
1224 If BUFFER is nil, then some other buffer is chosen.\n\
1225 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1226 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1227 window even if BUFFER is already visible in the selected window.")
1228 (buffer
, other_window
)
1229 Lisp_Object buffer
, other_window
;
1231 register Lisp_Object buf
;
1233 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
1236 buf
= Fget_buffer (buffer
);
1239 buf
= Fget_buffer_create (buffer
);
1240 Fset_buffer_major_mode (buf
);
1244 record_buffer (buf
);
1245 Fselect_window (Fdisplay_buffer (buf
, other_window
));
1249 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1250 "Return the current buffer as a Lisp object.")
1253 register Lisp_Object buf
;
1254 XSETBUFFER (buf
, current_buffer
);
1258 /* Set the current buffer to B. */
1261 set_buffer_internal (b
)
1262 register struct buffer
*b
;
1264 register struct buffer
*old_buf
;
1265 register Lisp_Object tail
, valcontents
;
1268 if (current_buffer
== b
)
1271 windows_or_buffers_changed
= 1;
1272 set_buffer_internal_1 (b
);
1275 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1276 This is used by redisplay. */
1279 set_buffer_internal_1 (b
)
1280 register struct buffer
*b
;
1282 register struct buffer
*old_buf
;
1283 register Lisp_Object tail
, valcontents
;
1286 if (current_buffer
== b
)
1289 old_buf
= current_buffer
;
1291 last_known_column_point
= -1; /* invalidate indentation cache */
1295 /* Put the undo list back in the base buffer, so that it appears
1296 that an indirect buffer shares the undo list of its base. */
1297 if (old_buf
->base_buffer
)
1298 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1300 /* If the old current buffer has markers to record PT, BEGV and ZV
1301 when it is not current, update them now. */
1302 if (! NILP (old_buf
->pt_marker
))
1305 XSETBUFFER (obuf
, old_buf
);
1306 Fset_marker (old_buf
->pt_marker
, BUF_PT (old_buf
), obuf
);
1308 if (! NILP (old_buf
->begv_marker
))
1311 XSETBUFFER (obuf
, old_buf
);
1312 Fset_marker (old_buf
->begv_marker
, BUF_BEGV (old_buf
), obuf
);
1314 if (! NILP (old_buf
->zv_marker
))
1317 XSETBUFFER (obuf
, old_buf
);
1318 Fset_marker (old_buf
->zv_marker
, BUF_ZV (old_buf
), obuf
);
1322 /* Get the undo list from the base buffer, so that it appears
1323 that an indirect buffer shares the undo list of its base. */
1325 b
->undo_list
= b
->base_buffer
->undo_list
;
1327 /* If the new current buffer has markers to record PT, BEGV and ZV
1328 when it is not current, fetch them now. */
1329 if (! NILP (b
->pt_marker
))
1330 BUF_PT (b
) = marker_position (b
->pt_marker
);
1331 if (! NILP (b
->begv_marker
))
1332 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1333 if (! NILP (b
->zv_marker
))
1334 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1336 /* Look down buffer's list of local Lisp variables
1337 to find and update any that forward into C variables. */
1339 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1341 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1342 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1343 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1344 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1345 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1346 /* Just reference the variable
1347 to cause it to become set for this buffer. */
1348 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1351 /* Do the same with any others that were local to the previous buffer */
1354 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1356 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1357 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1358 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1359 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->car
,
1360 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1361 /* Just reference the variable
1362 to cause it to become set for this buffer. */
1363 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1367 /* Switch to buffer B temporarily for redisplay purposes.
1368 This avoids certain things that don't need to be done within redisplay. */
1374 register struct buffer
*old_buf
;
1376 if (current_buffer
== b
)
1379 old_buf
= current_buffer
;
1384 /* If the old current buffer has markers to record PT, BEGV and ZV
1385 when it is not current, update them now. */
1386 if (! NILP (old_buf
->pt_marker
))
1389 XSETBUFFER (obuf
, old_buf
);
1390 Fset_marker (old_buf
->pt_marker
, BUF_PT (old_buf
), obuf
);
1392 if (! NILP (old_buf
->begv_marker
))
1395 XSETBUFFER (obuf
, old_buf
);
1396 Fset_marker (old_buf
->begv_marker
, BUF_BEGV (old_buf
), obuf
);
1398 if (! NILP (old_buf
->zv_marker
))
1401 XSETBUFFER (obuf
, old_buf
);
1402 Fset_marker (old_buf
->zv_marker
, BUF_ZV (old_buf
), obuf
);
1406 /* If the new current buffer has markers to record PT, BEGV and ZV
1407 when it is not current, fetch them now. */
1408 if (! NILP (b
->pt_marker
))
1409 BUF_PT (b
) = marker_position (b
->pt_marker
);
1410 if (! NILP (b
->begv_marker
))
1411 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1412 if (! NILP (b
->zv_marker
))
1413 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1416 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1417 "Make the buffer BUFFER current for editing operations.\n\
1418 BUFFER may be a buffer or the name of an existing buffer.\n\
1419 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1420 This function does not display the buffer, so its effect ends\n\
1421 when the current command terminates.\n\
1422 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1424 register Lisp_Object buffer
;
1426 register Lisp_Object buf
;
1427 buf
= Fget_buffer (buffer
);
1430 if (NILP (XBUFFER (buf
)->name
))
1431 error ("Selecting deleted buffer");
1432 set_buffer_internal (XBUFFER (buf
));
1436 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1437 Sbarf_if_buffer_read_only
, 0, 0, 0,
1438 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1441 if (!NILP (current_buffer
->read_only
)
1442 && NILP (Vinhibit_read_only
))
1443 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1447 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1448 "Put BUFFER at the end of the list of all buffers.\n\
1449 There it is the least likely candidate for `other-buffer' to return;\n\
1450 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1451 If BUFFER is nil or omitted, bury the current buffer.\n\
1452 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1453 selected window if it is displayed there.")
1455 register Lisp_Object buffer
;
1457 /* Figure out what buffer we're going to bury. */
1460 XSETBUFFER (buffer
, current_buffer
);
1462 /* If we're burying the current buffer, unshow it. */
1463 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
), Qnil
);
1469 buf1
= Fget_buffer (buffer
);
1475 /* Move buffer to the end of the buffer list. */
1477 register Lisp_Object aelt
, link
;
1479 aelt
= Frassq (buffer
, Vbuffer_alist
);
1480 link
= Fmemq (aelt
, Vbuffer_alist
);
1481 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1482 XCONS (link
)->cdr
= Qnil
;
1483 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1489 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1490 "Delete the entire contents of the current buffer.\n\
1491 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1492 so the buffer is truly empty after this.")
1497 current_buffer
->last_window_start
= 1;
1498 /* Prevent warnings, or suspension of auto saving, that would happen
1499 if future size is less than past size. Use of erase-buffer
1500 implies that the future text is not really related to the past text. */
1501 XSETFASTINT (current_buffer
->save_length
, 0);
1505 validate_region (b
, e
)
1506 register Lisp_Object
*b
, *e
;
1508 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1509 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1511 if (XINT (*b
) > XINT (*e
))
1514 tem
= *b
; *b
= *e
; *e
= tem
;
1517 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1518 && XINT (*e
) <= ZV
))
1519 args_out_of_range (*b
, *e
);
1522 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1524 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1525 Most local variable bindings are eliminated so that the default values\n\
1526 become effective once more. Also, the syntax table is set from\n\
1527 `standard-syntax-table', the local keymap is set to nil,\n\
1528 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1529 This function also forces redisplay of the mode line.\n\
1531 Every function to select a new major mode starts by\n\
1532 calling this function.\n\n\
1533 As a special exception, local variables whose names have\n\
1534 a non-nil `permanent-local' property are not eliminated by this function.\n\
1536 The first thing this function does is run\n\
1537 the normal hook `change-major-mode-hook'.")
1540 register Lisp_Object alist
, sym
, tem
;
1543 if (!NILP (Vrun_hooks
))
1544 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1545 oalist
= current_buffer
->local_var_alist
;
1547 /* Make sure none of the bindings in oalist
1548 remain swapped in, in their symbols. */
1550 swap_out_buffer_local_variables (current_buffer
);
1552 /* Actually eliminate all local bindings of this buffer. */
1554 reset_buffer_local_variables (current_buffer
);
1556 /* Redisplay mode lines; we are changing major mode. */
1558 update_mode_lines
++;
1560 /* Any which are supposed to be permanent,
1561 make local again, with the same values they had. */
1563 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1565 sym
= XCONS (XCONS (alist
)->car
)->car
;
1566 tem
= Fget (sym
, Qpermanent_local
);
1569 Fmake_local_variable (sym
);
1570 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1574 /* Force mode-line redisplay. Useful here because all major mode
1575 commands call this function. */
1576 update_mode_lines
++;
1581 /* Make sure no local variables remain set up with buffer B
1582 for their current values. */
1585 swap_out_buffer_local_variables (b
)
1588 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1590 XSETBUFFER (buffer
, b
);
1591 oalist
= b
->local_var_alist
;
1593 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1595 sym
= XCONS (XCONS (alist
)->car
)->car
;
1597 /* Need not do anything if some other buffer's binding is now encached. */
1598 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
;
1599 if (XBUFFER (tem
) == current_buffer
)
1601 /* Symbol is set up for this buffer's old local value.
1602 Set it up for the current buffer with the default value. */
1604 tem
= XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1605 /* Store the symbol's current value into the alist entry
1606 it is currently set up for. This is so that, if the
1607 local is marked permanent, and we make it local again
1608 later in Fkill_all_local_variables, we don't lose the value. */
1609 XCONS (XCONS (tem
)->car
)->cdr
1610 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
);
1611 /* Switch to the symbol's default-value alist entry. */
1612 XCONS (tem
)->car
= tem
;
1613 /* Mark it as current for buffer B. */
1614 XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
)->car
1616 /* Store the current value into any forwarding in the symbol. */
1617 store_symval_forwarding (sym
, XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->car
,
1623 /* Find all the overlays in the current buffer that contain position POS.
1624 Return the number found, and store them in a vector in *VEC_PTR.
1625 Store in *LEN_PTR the size allocated for the vector.
1626 Store in *NEXT_PTR the next position after POS where an overlay starts,
1627 or ZV if there are no more overlays.
1628 Store in *PREV_PTR the previous position before POS where an overlay ends,
1629 or BEGV if there are no previous overlays.
1630 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1632 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1633 when this function is called.
1635 If EXTEND is non-zero, we make the vector bigger if necessary.
1636 If EXTEND is zero, we never extend the vector,
1637 and we store only as many overlays as will fit.
1638 But we still return the total number of overlays. */
1641 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1644 Lisp_Object
**vec_ptr
;
1649 Lisp_Object tail
, overlay
, start
, end
, result
;
1652 Lisp_Object
*vec
= *vec_ptr
;
1655 int inhibit_storing
= 0;
1657 for (tail
= current_buffer
->overlays_before
;
1659 tail
= XCONS (tail
)->cdr
)
1661 int startpos
, endpos
;
1663 overlay
= XCONS (tail
)->car
;
1665 start
= OVERLAY_START (overlay
);
1666 end
= OVERLAY_END (overlay
);
1667 endpos
= OVERLAY_POSITION (end
);
1676 startpos
= OVERLAY_POSITION (start
);
1677 if (startpos
<= pos
)
1681 /* The supplied vector is full.
1682 Either make it bigger, or don't store any more in it. */
1685 *len_ptr
= len
*= 2;
1686 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1690 inhibit_storing
= 1;
1693 if (!inhibit_storing
)
1695 /* Keep counting overlays even if we can't return them all. */
1698 else if (startpos
< next
)
1702 for (tail
= current_buffer
->overlays_after
;
1704 tail
= XCONS (tail
)->cdr
)
1706 int startpos
, endpos
;
1708 overlay
= XCONS (tail
)->car
;
1710 start
= OVERLAY_START (overlay
);
1711 end
= OVERLAY_END (overlay
);
1712 startpos
= OVERLAY_POSITION (start
);
1715 if (startpos
< next
)
1719 endpos
= OVERLAY_POSITION (end
);
1726 *len_ptr
= len
*= 2;
1727 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1731 inhibit_storing
= 1;
1734 if (!inhibit_storing
)
1738 else if (endpos
< pos
&& endpos
> prev
)
1749 /* Find all the overlays in the current buffer that overlap the range BEG-END
1750 or are empty at BEG.
1752 Return the number found, and store them in a vector in *VEC_PTR.
1753 Store in *LEN_PTR the size allocated for the vector.
1754 Store in *NEXT_PTR the next position after POS where an overlay starts,
1755 or ZV if there are no more overlays.
1756 Store in *PREV_PTR the previous position before POS where an overlay ends,
1757 or BEGV if there are no previous overlays.
1758 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1760 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1761 when this function is called.
1763 If EXTEND is non-zero, we make the vector bigger if necessary.
1764 If EXTEND is zero, we never extend the vector,
1765 and we store only as many overlays as will fit.
1766 But we still return the total number of overlays. */
1769 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1772 Lisp_Object
**vec_ptr
;
1777 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
1780 Lisp_Object
*vec
= *vec_ptr
;
1783 int inhibit_storing
= 0;
1785 for (tail
= current_buffer
->overlays_before
;
1787 tail
= XCONS (tail
)->cdr
)
1789 int startpos
, endpos
;
1791 overlay
= XCONS (tail
)->car
;
1793 ostart
= OVERLAY_START (overlay
);
1794 oend
= OVERLAY_END (overlay
);
1795 endpos
= OVERLAY_POSITION (oend
);
1802 startpos
= OVERLAY_POSITION (ostart
);
1803 /* Count an interval if it either overlaps the range
1804 or is empty at the start of the range. */
1805 if ((beg
< endpos
&& startpos
< end
)
1806 || (startpos
== endpos
&& beg
== endpos
))
1810 /* The supplied vector is full.
1811 Either make it bigger, or don't store any more in it. */
1814 *len_ptr
= len
*= 2;
1815 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1819 inhibit_storing
= 1;
1822 if (!inhibit_storing
)
1824 /* Keep counting overlays even if we can't return them all. */
1827 else if (startpos
< next
)
1831 for (tail
= current_buffer
->overlays_after
;
1833 tail
= XCONS (tail
)->cdr
)
1835 int startpos
, endpos
;
1837 overlay
= XCONS (tail
)->car
;
1839 ostart
= OVERLAY_START (overlay
);
1840 oend
= OVERLAY_END (overlay
);
1841 startpos
= OVERLAY_POSITION (ostart
);
1844 if (startpos
< next
)
1848 endpos
= OVERLAY_POSITION (oend
);
1849 /* Count an interval if it either overlaps the range
1850 or is empty at the start of the range. */
1851 if ((beg
< endpos
&& startpos
< end
)
1852 || (startpos
== endpos
&& beg
== endpos
))
1858 *len_ptr
= len
*= 2;
1859 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1863 inhibit_storing
= 1;
1866 if (!inhibit_storing
)
1870 else if (endpos
< beg
&& endpos
> prev
)
1881 /* Fast function to just test if we're at an overlay boundary. */
1883 overlay_touches_p (pos
)
1886 Lisp_Object tail
, overlay
;
1888 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
1889 tail
= XCONS (tail
)->cdr
)
1893 overlay
= XCONS (tail
)->car
;
1894 if (!GC_OVERLAYP (overlay
))
1897 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1900 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
1904 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
1905 tail
= XCONS (tail
)->cdr
)
1909 overlay
= XCONS (tail
)->car
;
1910 if (!GC_OVERLAYP (overlay
))
1913 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1916 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
1924 Lisp_Object overlay
;
1930 compare_overlays (s1
, s2
)
1931 struct sortvec
*s1
, *s2
;
1933 if (s1
->priority
!= s2
->priority
)
1934 return s1
->priority
- s2
->priority
;
1935 if (s1
->beg
!= s2
->beg
)
1936 return s1
->beg
- s2
->beg
;
1937 if (s1
->end
!= s2
->end
)
1938 return s2
->end
- s1
->end
;
1942 /* Sort an array of overlays by priority. The array is modified in place.
1943 The return value is the new size; this may be smaller than the original
1944 size if some of the overlays were invalid or were window-specific. */
1946 sort_overlays (overlay_vec
, noverlays
, w
)
1947 Lisp_Object
*overlay_vec
;
1952 struct sortvec
*sortvec
;
1953 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1955 /* Put the valid and relevant overlays into sortvec. */
1957 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1960 Lisp_Object overlay
;
1962 overlay
= overlay_vec
[i
];
1963 if (OVERLAY_VALID (overlay
)
1964 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1965 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1967 /* If we're interested in a specific window, then ignore
1968 overlays that are limited to some other window. */
1973 window
= Foverlay_get (overlay
, Qwindow
);
1974 if (WINDOWP (window
) && XWINDOW (window
) != w
)
1978 /* This overlay is good and counts: put it into sortvec. */
1979 sortvec
[j
].overlay
= overlay
;
1980 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1981 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1982 tem
= Foverlay_get (overlay
, Qpriority
);
1984 sortvec
[j
].priority
= XINT (tem
);
1986 sortvec
[j
].priority
= 0;
1992 /* Sort the overlays into the proper order: increasing priority. */
1995 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1997 for (i
= 0; i
< noverlays
; i
++)
1998 overlay_vec
[i
] = sortvec
[i
].overlay
;
2004 Lisp_Object string
, string2
;
2011 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2012 int size
; /* Allocated length of that array. */
2013 int used
; /* How much of the array is currently in use. */
2014 int bytes
; /* Total length of the strings in buf. */
2017 /* Buffers for storing information about the overlays touching a given
2018 position. These could be automatic variables in overlay_strings, but
2019 it's more efficient to hold onto the memory instead of repeatedly
2020 allocating and freeing it. */
2021 static struct sortstrlist overlay_heads
, overlay_tails
;
2022 static char *overlay_str_buf
;
2024 /* Allocated length of overlay_str_buf. */
2025 static int overlay_str_len
;
2027 /* A comparison function suitable for passing to qsort. */
2029 cmp_for_strings (as1
, as2
)
2032 struct sortstr
*s1
= (struct sortstr
*)as1
;
2033 struct sortstr
*s2
= (struct sortstr
*)as2
;
2034 if (s1
->size
!= s2
->size
)
2035 return s2
->size
- s1
->size
;
2036 if (s1
->priority
!= s2
->priority
)
2037 return s1
->priority
- s2
->priority
;
2042 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2043 struct sortstrlist
*ssl
;
2044 Lisp_Object str
, str2
, pri
;
2047 if (ssl
->used
== ssl
->size
)
2053 ssl
->buf
= ((struct sortstr
*)
2054 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2056 ssl
->buf
[ssl
->used
].string
= str
;
2057 ssl
->buf
[ssl
->used
].string2
= str2
;
2058 ssl
->buf
[ssl
->used
].size
= size
;
2059 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2061 ssl
->bytes
+= XSTRING (str
)->size
;
2063 ssl
->bytes
+= XSTRING (str2
)->size
;
2066 /* Return the concatenation of the strings associated with overlays that
2067 begin or end at POS, ignoring overlays that are specific to a window
2068 other than W. The strings are concatenated in the appropriate order:
2069 shorter overlays nest inside longer ones, and higher priority inside
2070 lower. Normally all of the after-strings come first, but zero-sized
2071 overlays have their after-strings ride along with the before-strings
2072 because it would look strange to print them inside-out.
2074 Returns the string length, and stores the contents indirectly through
2075 PSTR, if that variable is non-null. The string may be overwritten by
2076 subsequent calls. */
2078 overlay_strings (pos
, w
, pstr
)
2083 Lisp_Object ov
, overlay
, window
, str
;
2084 int startpos
, endpos
;
2086 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2087 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2088 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2090 overlay
= XCONS (ov
)->car
;
2091 if (!OVERLAYP (overlay
))
2094 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2095 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2098 if (endpos
!= pos
&& startpos
!= pos
)
2100 window
= Foverlay_get (overlay
, Qwindow
);
2101 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2104 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2105 record_overlay_string (&overlay_heads
, str
,
2107 ? Foverlay_get (overlay
, Qafter_string
)
2109 Foverlay_get (overlay
, Qpriority
),
2111 else if (endpos
== pos
2112 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2113 record_overlay_string (&overlay_tails
, str
, Qnil
,
2114 Foverlay_get (overlay
, Qpriority
),
2117 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2119 overlay
= XCONS (ov
)->car
;
2120 if (!OVERLAYP (overlay
))
2123 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2124 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2127 if (endpos
!= pos
&& startpos
!= pos
)
2129 window
= Foverlay_get (overlay
, Qwindow
);
2130 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2133 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2134 record_overlay_string (&overlay_heads
, str
,
2136 ? Foverlay_get (overlay
, Qafter_string
)
2138 Foverlay_get (overlay
, Qpriority
),
2140 else if (endpos
== pos
2141 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2142 record_overlay_string (&overlay_tails
, str
, Qnil
,
2143 Foverlay_get (overlay
, Qpriority
),
2146 if (overlay_tails
.used
> 1)
2147 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2149 if (overlay_heads
.used
> 1)
2150 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2152 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2157 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2159 if (total
> overlay_str_len
)
2160 overlay_str_buf
= (char *)xrealloc (overlay_str_buf
,
2161 overlay_str_len
= total
);
2162 p
= overlay_str_buf
;
2163 for (i
= overlay_tails
.used
; --i
>= 0;)
2165 tem
= overlay_tails
.buf
[i
].string
;
2166 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2167 p
+= XSTRING (tem
)->size
;
2169 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2171 tem
= overlay_heads
.buf
[i
].string
;
2172 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2173 p
+= XSTRING (tem
)->size
;
2174 tem
= overlay_heads
.buf
[i
].string2
;
2177 bcopy (XSTRING (tem
)->data
, p
, XSTRING (tem
)->size
);
2178 p
+= XSTRING (tem
)->size
;
2181 if (p
!= overlay_str_buf
+ total
)
2184 *pstr
= overlay_str_buf
;
2190 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2193 recenter_overlay_lists (buf
, pos
)
2197 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2199 /* See if anything in overlays_before should move to overlays_after. */
2201 /* We don't strictly need prev in this loop; it should always be nil.
2202 But we use it for symmetry and in case that should cease to be true
2203 with some future change. */
2205 for (tail
= buf
->overlays_before
;
2207 prev
= tail
, tail
= next
)
2209 next
= XCONS (tail
)->cdr
;
2210 overlay
= XCONS (tail
)->car
;
2212 /* If the overlay is not valid, get rid of it. */
2213 if (!OVERLAY_VALID (overlay
))
2218 /* Splice the cons cell TAIL out of overlays_before. */
2220 XCONS (prev
)->cdr
= next
;
2222 buf
->overlays_before
= next
;
2228 beg
= OVERLAY_START (overlay
);
2229 end
= OVERLAY_END (overlay
);
2231 if (OVERLAY_POSITION (end
) > pos
)
2233 /* OVERLAY needs to be moved. */
2234 int where
= OVERLAY_POSITION (beg
);
2235 Lisp_Object other
, other_prev
;
2237 /* Splice the cons cell TAIL out of overlays_before. */
2239 XCONS (prev
)->cdr
= next
;
2241 buf
->overlays_before
= next
;
2243 /* Search thru overlays_after for where to put it. */
2245 for (other
= buf
->overlays_after
;
2247 other_prev
= other
, other
= XCONS (other
)->cdr
)
2249 Lisp_Object otherbeg
, otheroverlay
, follower
;
2252 otheroverlay
= XCONS (other
)->car
;
2253 if (! OVERLAY_VALID (otheroverlay
))
2256 otherbeg
= OVERLAY_START (otheroverlay
);
2257 if (OVERLAY_POSITION (otherbeg
) >= where
)
2261 /* Add TAIL to overlays_after before OTHER. */
2262 XCONS (tail
)->cdr
= other
;
2263 if (!NILP (other_prev
))
2264 XCONS (other_prev
)->cdr
= tail
;
2266 buf
->overlays_after
= tail
;
2270 /* We've reached the things that should stay in overlays_before.
2271 All the rest of overlays_before must end even earlier,
2276 /* See if anything in overlays_after should be in overlays_before. */
2278 for (tail
= buf
->overlays_after
;
2280 prev
= tail
, tail
= next
)
2282 next
= XCONS (tail
)->cdr
;
2283 overlay
= XCONS (tail
)->car
;
2285 /* If the overlay is not valid, get rid of it. */
2286 if (!OVERLAY_VALID (overlay
))
2291 /* Splice the cons cell TAIL out of overlays_after. */
2293 XCONS (prev
)->cdr
= next
;
2295 buf
->overlays_after
= next
;
2301 beg
= OVERLAY_START (overlay
);
2302 end
= OVERLAY_END (overlay
);
2304 /* Stop looking, when we know that nothing further
2305 can possibly end before POS. */
2306 if (OVERLAY_POSITION (beg
) > pos
)
2309 if (OVERLAY_POSITION (end
) <= pos
)
2311 /* OVERLAY needs to be moved. */
2312 int where
= OVERLAY_POSITION (end
);
2313 Lisp_Object other
, other_prev
;
2315 /* Splice the cons cell TAIL out of overlays_after. */
2317 XCONS (prev
)->cdr
= next
;
2319 buf
->overlays_after
= next
;
2321 /* Search thru overlays_before for where to put it. */
2323 for (other
= buf
->overlays_before
;
2325 other_prev
= other
, other
= XCONS (other
)->cdr
)
2327 Lisp_Object otherend
, otheroverlay
;
2330 otheroverlay
= XCONS (other
)->car
;
2331 if (! OVERLAY_VALID (otheroverlay
))
2334 otherend
= OVERLAY_END (otheroverlay
);
2335 if (OVERLAY_POSITION (otherend
) <= where
)
2339 /* Add TAIL to overlays_before before OTHER. */
2340 XCONS (tail
)->cdr
= other
;
2341 if (!NILP (other_prev
))
2342 XCONS (other_prev
)->cdr
= tail
;
2344 buf
->overlays_before
= tail
;
2349 XSETFASTINT (buf
->overlay_center
, pos
);
2353 adjust_overlays_for_insert (pos
, length
)
2357 /* After an insertion, the lists are still sorted properly,
2358 but we may need to update the value of the overlay center. */
2359 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2360 XSETFASTINT (current_buffer
->overlay_center
,
2361 XFASTINT (current_buffer
->overlay_center
) + length
);
2365 adjust_overlays_for_delete (pos
, length
)
2369 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2370 /* The deletion was to our right. No change needed; the before- and
2371 after-lists are still consistent. */
2373 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2374 /* The deletion was to our left. We need to adjust the center value
2375 to account for the change in position, but the lists are consistent
2376 given the new value. */
2377 XSETFASTINT (current_buffer
->overlay_center
,
2378 XFASTINT (current_buffer
->overlay_center
) - length
);
2380 /* We're right in the middle. There might be things on the after-list
2381 that now belong on the before-list. Recentering will move them,
2382 and also update the center point. */
2383 recenter_overlay_lists (current_buffer
, pos
);
2386 /* Fix up overlays that were garbled as a result of permuting markers
2387 in the range START through END. Any overlay with at least one
2388 endpoint in this range will need to be unlinked from the overlay
2389 list and reinserted in its proper place.
2390 Such an overlay might even have negative size at this point.
2391 If so, we'll reverse the endpoints. Can you think of anything
2392 better to do in this situation? */
2394 fix_overlays_in_range (start
, end
)
2395 register int start
, end
;
2397 Lisp_Object tem
, overlay
;
2398 Lisp_Object before_list
, after_list
;
2399 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2400 int startpos
, endpos
;
2402 /* This algorithm shifts links around instead of consing and GCing.
2403 The loop invariant is that before_list (resp. after_list) is a
2404 well-formed list except that its last element, the one that
2405 *pbefore (resp. *pafter) points to, is still uninitialized.
2406 So it's not a bug that before_list isn't initialized, although
2407 it may look strange. */
2408 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2410 overlay
= XCONS (*ptail
)->car
;
2411 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2414 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2416 || (startpos
>= start
&& startpos
< end
))
2418 /* If the overlay is backwards, fix that now. */
2419 if (startpos
> endpos
)
2422 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2423 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2424 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2426 /* Add it to the end of the wrong list. Later on,
2427 recenter_overlay_lists will move it to the right place. */
2428 if (endpos
< XINT (current_buffer
->overlay_center
))
2431 pafter
= &XCONS (*ptail
)->cdr
;
2436 pbefore
= &XCONS (*ptail
)->cdr
;
2438 *ptail
= XCONS (*ptail
)->cdr
;
2441 ptail
= &XCONS (*ptail
)->cdr
;
2443 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2445 overlay
= XCONS (*ptail
)->car
;
2446 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2447 if (startpos
>= end
)
2449 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2450 if (startpos
>= start
2451 || (endpos
>= start
&& endpos
< end
))
2453 if (startpos
> endpos
)
2456 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
2457 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
2458 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2460 if (endpos
< XINT (current_buffer
->overlay_center
))
2463 pafter
= &XCONS (*ptail
)->cdr
;
2468 pbefore
= &XCONS (*ptail
)->cdr
;
2470 *ptail
= XCONS (*ptail
)->cdr
;
2473 ptail
= &XCONS (*ptail
)->cdr
;
2476 /* Splice the constructed (wrong) lists into the buffer's lists,
2477 and let the recenter function make it sane again. */
2478 *pbefore
= current_buffer
->overlays_before
;
2479 current_buffer
->overlays_before
= before_list
;
2480 recenter_overlay_lists (current_buffer
,
2481 XINT (current_buffer
->overlay_center
));
2483 *pafter
= current_buffer
->overlays_after
;
2484 current_buffer
->overlays_after
= after_list
;
2485 recenter_overlay_lists (current_buffer
,
2486 XINT (current_buffer
->overlay_center
));
2489 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
2490 "Return t if OBJECT is an overlay.")
2494 return (OVERLAYP (object
) ? Qt
: Qnil
);
2497 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
2498 "Create a new overlay with range BEG to END in BUFFER.\n\
2499 If omitted, BUFFER defaults to the current buffer.\n\
2500 BEG and END may be integers or markers.\n\
2501 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
2502 front delimiter advance when text is inserted there.\n\
2503 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
2504 rear delimiter advance when text is inserted there.")
2505 (beg
, end
, buffer
, front_advance
, rear_advance
)
2506 Lisp_Object beg
, end
, buffer
;
2507 Lisp_Object front_advance
, rear_advance
;
2509 Lisp_Object overlay
;
2513 XSETBUFFER (buffer
, current_buffer
);
2515 CHECK_BUFFER (buffer
, 2);
2517 && ! EQ (Fmarker_buffer (beg
), buffer
))
2518 error ("Marker points into wrong buffer");
2520 && ! EQ (Fmarker_buffer (end
), buffer
))
2521 error ("Marker points into wrong buffer");
2523 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2524 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2526 if (XINT (beg
) > XINT (end
))
2529 temp
= beg
; beg
= end
; end
= temp
;
2532 b
= XBUFFER (buffer
);
2534 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
2535 end
= Fset_marker (Fmake_marker (), end
, buffer
);
2537 if (!NILP (front_advance
))
2538 XMARKER (beg
)->insertion_type
= 1;
2539 if (!NILP (rear_advance
))
2540 XMARKER (end
)->insertion_type
= 1;
2542 overlay
= allocate_misc ();
2543 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
2544 XOVERLAY (overlay
)->start
= beg
;
2545 XOVERLAY (overlay
)->end
= end
;
2546 XOVERLAY (overlay
)->plist
= Qnil
;
2548 /* Put the new overlay on the wrong list. */
2549 end
= OVERLAY_END (overlay
);
2550 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2551 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2553 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2555 /* This puts it in the right list, and in the right order. */
2556 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2558 /* We don't need to redisplay the region covered by the overlay, because
2559 the overlay has no properties at the moment. */
2564 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
2565 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
2566 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
2567 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
2569 (overlay
, beg
, end
, buffer
)
2570 Lisp_Object overlay
, beg
, end
, buffer
;
2572 struct buffer
*b
, *ob
;
2573 Lisp_Object obuffer
;
2574 int count
= specpdl_ptr
- specpdl
;
2576 CHECK_OVERLAY (overlay
, 0);
2578 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2580 XSETBUFFER (buffer
, current_buffer
);
2581 CHECK_BUFFER (buffer
, 3);
2584 && ! EQ (Fmarker_buffer (beg
), buffer
))
2585 error ("Marker points into wrong buffer");
2587 && ! EQ (Fmarker_buffer (end
), buffer
))
2588 error ("Marker points into wrong buffer");
2590 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
2591 CHECK_NUMBER_COERCE_MARKER (end
, 1);
2593 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
2594 return Fdelete_overlay (overlay
);
2596 if (XINT (beg
) > XINT (end
))
2599 temp
= beg
; beg
= end
; end
= temp
;
2602 specbind (Qinhibit_quit
, Qt
);
2604 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2605 b
= XBUFFER (buffer
);
2606 ob
= XBUFFER (obuffer
);
2608 /* If the overlay has changed buffers, do a thorough redisplay. */
2609 if (!EQ (buffer
, obuffer
))
2611 /* Redisplay where the overlay was. */
2612 if (!NILP (obuffer
))
2617 o_beg
= OVERLAY_START (overlay
);
2618 o_end
= OVERLAY_END (overlay
);
2619 o_beg
= OVERLAY_POSITION (o_beg
);
2620 o_end
= OVERLAY_POSITION (o_end
);
2622 redisplay_region (ob
, XINT (o_beg
), XINT (o_end
));
2625 /* Redisplay where the overlay is going to be. */
2626 redisplay_region (b
, XINT (beg
), XINT (end
));
2629 /* Redisplay the area the overlay has just left, or just enclosed. */
2633 int change_beg
, change_end
;
2635 o_beg
= OVERLAY_START (overlay
);
2636 o_end
= OVERLAY_END (overlay
);
2637 o_beg
= OVERLAY_POSITION (o_beg
);
2638 o_end
= OVERLAY_POSITION (o_end
);
2640 if (XINT (o_beg
) == XINT (beg
))
2641 redisplay_region (b
, XINT (o_end
), XINT (end
));
2642 else if (XINT (o_end
) == XINT (end
))
2643 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
2646 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
2647 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
2648 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
2652 if (!NILP (obuffer
))
2654 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
2655 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
2658 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
2659 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
2661 /* Put the overlay on the wrong list. */
2662 end
= OVERLAY_END (overlay
);
2663 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
2664 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
2666 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
2668 /* This puts it in the right list, and in the right order. */
2669 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
2671 return unbind_to (count
, overlay
);
2674 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
2675 "Delete the overlay OVERLAY from its buffer.")
2677 Lisp_Object overlay
;
2681 int count
= specpdl_ptr
- specpdl
;
2683 CHECK_OVERLAY (overlay
, 0);
2685 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2689 b
= XBUFFER (buffer
);
2691 specbind (Qinhibit_quit
, Qt
);
2693 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
2694 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
2696 redisplay_region (b
,
2697 marker_position (OVERLAY_START (overlay
)),
2698 marker_position (OVERLAY_END (overlay
)));
2700 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
2701 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
2703 return unbind_to (count
, Qnil
);
2706 /* Overlay dissection functions. */
2708 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
2709 "Return the position at which OVERLAY starts.")
2711 Lisp_Object overlay
;
2713 CHECK_OVERLAY (overlay
, 0);
2715 return (Fmarker_position (OVERLAY_START (overlay
)));
2718 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
2719 "Return the position at which OVERLAY ends.")
2721 Lisp_Object overlay
;
2723 CHECK_OVERLAY (overlay
, 0);
2725 return (Fmarker_position (OVERLAY_END (overlay
)));
2728 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
2729 "Return the buffer OVERLAY belongs to.")
2731 Lisp_Object overlay
;
2733 CHECK_OVERLAY (overlay
, 0);
2735 return Fmarker_buffer (OVERLAY_START (overlay
));
2738 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
2739 "Return a list of the properties on OVERLAY.\n\
2740 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
2743 Lisp_Object overlay
;
2745 CHECK_OVERLAY (overlay
, 0);
2747 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
2751 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
2752 "Return a list of the overlays that contain position POS.")
2757 Lisp_Object
*overlay_vec
;
2761 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2764 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2766 /* Put all the overlays we want in a vector in overlay_vec.
2767 Store the length in len. */
2768 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2769 (int *) 0, (int *) 0);
2771 /* Make a list of them all. */
2772 result
= Flist (noverlays
, overlay_vec
);
2774 xfree (overlay_vec
);
2778 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
2779 "Return a list of the overlays that overlap the region BEG ... END.\n\
2780 Overlap means that at least one character is contained within the overlay\n\
2781 and also contained within the specified region.\n\
2782 Empty overlays are included in the result if they are located at BEG\n\
2783 or between BEG and END.")
2785 Lisp_Object beg
, end
;
2788 Lisp_Object
*overlay_vec
;
2792 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
2793 CHECK_NUMBER_COERCE_MARKER (end
, 0);
2796 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2798 /* Put all the overlays we want in a vector in overlay_vec.
2799 Store the length in len. */
2800 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
2801 (int *) 0, (int *) 0);
2803 /* Make a list of them all. */
2804 result
= Flist (noverlays
, overlay_vec
);
2806 xfree (overlay_vec
);
2810 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2812 "Return the next position after POS where an overlay starts or ends.\n\
2813 If there are no more overlay boundaries after POS, return (point-max).")
2819 Lisp_Object
*overlay_vec
;
2823 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2826 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2828 /* Put all the overlays we want in a vector in overlay_vec.
2829 Store the length in len.
2830 endpos gets the position where the next overlay starts. */
2831 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2832 &endpos
, (int *) 0);
2834 /* If any of these overlays ends before endpos,
2835 use its ending point instead. */
2836 for (i
= 0; i
< noverlays
; i
++)
2841 oend
= OVERLAY_END (overlay_vec
[i
]);
2842 oendpos
= OVERLAY_POSITION (oend
);
2843 if (oendpos
< endpos
)
2847 xfree (overlay_vec
);
2848 return make_number (endpos
);
2851 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
2852 Sprevious_overlay_change
, 1, 1, 0,
2853 "Return the previous position before POS where an overlay starts or ends.\n\
2854 If there are no more overlay boundaries before POS, return (point-min).")
2860 Lisp_Object
*overlay_vec
;
2865 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2868 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2870 /* At beginning of buffer, we know the answer;
2871 avoid bug subtracting 1 below. */
2872 if (XINT (pos
) == BEGV
)
2875 /* Put all the overlays we want in a vector in overlay_vec.
2876 Store the length in len.
2877 prevpos gets the position of an overlay end. */
2878 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
2879 (int *) 0, &prevpos
);
2881 /* If any of these overlays starts after prevpos,
2882 maybe use its starting point instead. */
2883 for (i
= 0; i
< noverlays
; i
++)
2888 ostart
= OVERLAY_START (overlay_vec
[i
]);
2889 ostartpos
= OVERLAY_POSITION (ostart
);
2890 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2891 prevpos
= ostartpos
;
2894 /* If any overlay ends at pos, consider its starting point too. */
2895 for (tail
= current_buffer
->overlays_before
;
2897 tail
= XCONS (tail
)->cdr
)
2899 Lisp_Object overlay
, ostart
;
2902 overlay
= XCONS (tail
)->car
;
2904 ostart
= OVERLAY_START (overlay
);
2905 ostartpos
= OVERLAY_POSITION (ostart
);
2906 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2907 prevpos
= ostartpos
;
2910 xfree (overlay_vec
);
2911 return make_number (prevpos
);
2914 /* These functions are for debugging overlays. */
2916 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2917 "Return a pair of lists giving all the overlays of the current buffer.\n\
2918 The car has all the overlays before the overlay center;\n\
2919 the cdr has all the overlays after the overlay center.\n\
2920 Recentering overlays moves overlays between these lists.\n\
2921 The lists you get are copies, so that changing them has no effect.\n\
2922 However, the overlays you get are the real objects that the buffer uses.")
2925 Lisp_Object before
, after
;
2926 before
= current_buffer
->overlays_before
;
2928 before
= Fcopy_sequence (before
);
2929 after
= current_buffer
->overlays_after
;
2931 after
= Fcopy_sequence (after
);
2933 return Fcons (before
, after
);
2936 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2937 "Recenter the overlays of the current buffer around position POS.")
2941 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2943 recenter_overlay_lists (current_buffer
, XINT (pos
));
2947 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2948 "Get the property of overlay OVERLAY with property name PROP.")
2950 Lisp_Object overlay
, prop
;
2952 Lisp_Object plist
, fallback
;
2954 CHECK_OVERLAY (overlay
, 0);
2958 for (plist
= XOVERLAY (overlay
)->plist
;
2959 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2960 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2962 if (EQ (XCONS (plist
)->car
, prop
))
2963 return XCONS (XCONS (plist
)->cdr
)->car
;
2964 else if (EQ (XCONS (plist
)->car
, Qcategory
))
2967 tem
= Fcar (Fcdr (plist
));
2969 fallback
= Fget (tem
, prop
);
2976 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2977 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2978 (overlay
, prop
, value
)
2979 Lisp_Object overlay
, prop
, value
;
2981 Lisp_Object tail
, buffer
;
2984 CHECK_OVERLAY (overlay
, 0);
2986 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2988 for (tail
= XOVERLAY (overlay
)->plist
;
2989 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2990 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2991 if (EQ (XCONS (tail
)->car
, prop
))
2993 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
2994 XCONS (XCONS (tail
)->cdr
)->car
= value
;
2997 /* It wasn't in the list, so add it to the front. */
2998 changed
= !NILP (value
);
2999 XOVERLAY (overlay
)->plist
3000 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3002 if (! NILP (buffer
))
3005 redisplay_region (XBUFFER (buffer
),
3006 marker_position (OVERLAY_START (overlay
)),
3007 marker_position (OVERLAY_END (overlay
)));
3008 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3009 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3010 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3011 Fdelete_overlay (overlay
);
3016 /* Subroutine of report_overlay_modification. */
3018 /* Lisp vector holding overlay hook functions to call.
3019 Vector elements come in pairs.
3020 Each even-index element is a list of hook functions.
3021 The following odd-index element is the overlay they came from.
3023 Before the buffer change, we fill in this vector
3024 as we call overlay hook functions.
3025 After the buffer change, we get the functions to call from this vector.
3026 This way we always call the same functions before and after the change. */
3027 static Lisp_Object last_overlay_modification_hooks
;
3029 /* Number of elements actually used in last_overlay_modification_hooks. */
3030 static int last_overlay_modification_hooks_used
;
3032 /* Add one functionlist/overlay pair
3033 to the end of last_overlay_modification_hooks. */
3036 add_overlay_mod_hooklist (functionlist
, overlay
)
3037 Lisp_Object functionlist
, overlay
;
3039 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3041 if (last_overlay_modification_hooks_used
== oldsize
)
3044 old
= last_overlay_modification_hooks
;
3045 last_overlay_modification_hooks
3046 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3047 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3048 XVECTOR (old
)->contents
,
3049 sizeof (Lisp_Object
) * oldsize
);
3051 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3052 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3055 /* Run the modification-hooks of overlays that include
3056 any part of the text in START to END.
3057 If this change is an insertion, also
3058 run the insert-before-hooks of overlay starting at END,
3059 and the insert-after-hooks of overlay ending at START.
3061 This is called both before and after the modification.
3062 AFTER is nonzero when we call after the modification.
3064 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3065 When AFTER is nonzero, they are the start position,
3066 the position after the inserted new text,
3067 and the length of deleted or replaced old text. */
3070 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3071 Lisp_Object start
, end
;
3073 Lisp_Object arg1
, arg2
, arg3
;
3075 Lisp_Object prop
, overlay
, tail
;
3076 /* 1 if this change is an insertion. */
3077 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3079 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3083 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3087 /* Call the functions recorded in last_overlay_modification_hooks
3088 rather than scanning the overlays again.
3089 First copy the vector contents, in case some of these hooks
3090 do subsequent modification of the buffer. */
3091 int size
= last_overlay_modification_hooks_used
;
3092 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3095 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3096 copy
, size
* sizeof (Lisp_Object
));
3098 gcpro1
.nvars
= size
;
3100 for (i
= 0; i
< size
;)
3102 Lisp_Object prop
, overlay
;
3104 overlay
= copy
[i
++];
3105 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3111 /* We are being called before a change.
3112 Scan the overlays to find the functions to call. */
3113 last_overlay_modification_hooks_used
= 0;
3115 for (tail
= current_buffer
->overlays_before
;
3117 tail
= XCONS (tail
)->cdr
)
3119 int startpos
, endpos
;
3120 Lisp_Object ostart
, oend
;
3122 overlay
= XCONS (tail
)->car
;
3124 ostart
= OVERLAY_START (overlay
);
3125 oend
= OVERLAY_END (overlay
);
3126 endpos
= OVERLAY_POSITION (oend
);
3127 if (XFASTINT (start
) > endpos
)
3129 startpos
= OVERLAY_POSITION (ostart
);
3130 if (insertion
&& (XFASTINT (start
) == startpos
3131 || XFASTINT (end
) == startpos
))
3133 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3136 /* Copy TAIL in case the hook recenters the overlay lists. */
3138 tail
= Fcopy_sequence (tail
);
3140 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3143 if (insertion
&& (XFASTINT (start
) == endpos
3144 || XFASTINT (end
) == endpos
))
3146 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3150 tail
= Fcopy_sequence (tail
);
3152 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3155 /* Test for intersecting intervals. This does the right thing
3156 for both insertion and deletion. */
3157 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3159 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3163 tail
= Fcopy_sequence (tail
);
3165 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3171 for (tail
= current_buffer
->overlays_after
;
3173 tail
= XCONS (tail
)->cdr
)
3175 int startpos
, endpos
;
3176 Lisp_Object ostart
, oend
;
3178 overlay
= XCONS (tail
)->car
;
3180 ostart
= OVERLAY_START (overlay
);
3181 oend
= OVERLAY_END (overlay
);
3182 startpos
= OVERLAY_POSITION (ostart
);
3183 endpos
= OVERLAY_POSITION (oend
);
3184 if (XFASTINT (end
) < startpos
)
3186 if (insertion
&& (XFASTINT (start
) == startpos
3187 || XFASTINT (end
) == startpos
))
3189 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3193 tail
= Fcopy_sequence (tail
);
3195 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3198 if (insertion
&& (XFASTINT (start
) == endpos
3199 || XFASTINT (end
) == endpos
))
3201 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3205 tail
= Fcopy_sequence (tail
);
3207 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3210 /* Test for intersecting intervals. This does the right thing
3211 for both insertion and deletion. */
3212 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3214 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3218 tail
= Fcopy_sequence (tail
);
3220 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3229 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3230 Lisp_Object list
, overlay
;
3232 Lisp_Object arg1
, arg2
, arg3
;
3234 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3236 GCPRO4 (list
, arg1
, arg2
, arg3
);
3238 add_overlay_mod_hooklist (list
, overlay
);
3240 while (!NILP (list
))
3243 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3245 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3251 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3254 evaporate_overlays (pos
)
3257 Lisp_Object tail
, overlay
, hit_list
;
3260 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3261 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3262 tail
= XCONS (tail
)->cdr
)
3265 overlay
= XCONS (tail
)->car
;
3266 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3269 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3270 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3271 hit_list
= Fcons (overlay
, hit_list
);
3274 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3275 tail
= XCONS (tail
)->cdr
)
3278 overlay
= XCONS (tail
)->car
;
3279 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3282 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3283 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3284 hit_list
= Fcons (overlay
, hit_list
);
3286 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3287 Fdelete_overlay (XCONS (hit_list
)->car
);
3290 /* Somebody has tried to store a value with an unacceptable type
3291 into the buffer-local slot with offset OFFSET. */
3293 buffer_slot_type_mismatch (offset
)
3298 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3299 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3301 case Lisp_Int
: type_name
= "integers"; break;
3302 case Lisp_String
: type_name
= "strings"; break;
3303 case Lisp_Symbol
: type_name
= "symbols"; break;
3308 error ("only %s should be stored in the buffer-local variable %s",
3309 type_name
, XSYMBOL (sym
)->name
->data
);
3314 register Lisp_Object tem
;
3316 /* Make sure all markable slots in buffer_defaults
3317 are initialized reasonably, so mark_buffer won't choke. */
3318 reset_buffer (&buffer_defaults
);
3319 reset_buffer_local_variables (&buffer_defaults
);
3320 reset_buffer (&buffer_local_symbols
);
3321 reset_buffer_local_variables (&buffer_local_symbols
);
3322 /* Prevent GC from getting confused. */
3323 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3324 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3325 #ifdef USE_TEXT_PROPERTIES
3326 BUF_INTERVALS (&buffer_defaults
) = 0;
3327 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3329 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3330 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3332 /* Set up the default values of various buffer slots. */
3333 /* Must do these before making the first buffer! */
3335 /* real setup is done in loaddefs.el */
3336 buffer_defaults
.mode_line_format
= build_string ("%-");
3337 buffer_defaults
.abbrev_mode
= Qnil
;
3338 buffer_defaults
.overwrite_mode
= Qnil
;
3339 buffer_defaults
.case_fold_search
= Qt
;
3340 buffer_defaults
.auto_fill_function
= Qnil
;
3341 buffer_defaults
.selective_display
= Qnil
;
3343 buffer_defaults
.selective_display_ellipses
= Qt
;
3345 buffer_defaults
.abbrev_table
= Qnil
;
3346 buffer_defaults
.display_table
= Qnil
;
3347 buffer_defaults
.undo_list
= Qnil
;
3348 buffer_defaults
.mark_active
= Qnil
;
3349 buffer_defaults
.file_format
= Qnil
;
3350 buffer_defaults
.overlays_before
= Qnil
;
3351 buffer_defaults
.overlays_after
= Qnil
;
3352 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3354 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3355 buffer_defaults
.truncate_lines
= Qnil
;
3356 buffer_defaults
.ctl_arrow
= Qt
;
3359 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3361 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3362 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3363 buffer_defaults
.cache_long_line_scans
= Qnil
;
3364 buffer_defaults
.file_truename
= Qnil
;
3366 /* Assign the local-flags to the slots that have default values.
3367 The local flag is a bit that is used in the buffer
3368 to say that it has its own local value for the slot.
3369 The local flag bits are in the local_var_flags slot of the buffer. */
3371 /* Nothing can work if this isn't true */
3372 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3374 /* 0 means not a lisp var, -1 means always local, else mask */
3375 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3376 XSETINT (buffer_local_flags
.filename
, -1);
3377 XSETINT (buffer_local_flags
.directory
, -1);
3378 XSETINT (buffer_local_flags
.backed_up
, -1);
3379 XSETINT (buffer_local_flags
.save_length
, -1);
3380 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3381 XSETINT (buffer_local_flags
.read_only
, -1);
3382 XSETINT (buffer_local_flags
.major_mode
, -1);
3383 XSETINT (buffer_local_flags
.mode_name
, -1);
3384 XSETINT (buffer_local_flags
.undo_list
, -1);
3385 XSETINT (buffer_local_flags
.mark_active
, -1);
3386 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3387 XSETINT (buffer_local_flags
.file_truename
, -1);
3388 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3389 XSETINT (buffer_local_flags
.file_format
, -1);
3391 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3392 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3393 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3394 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3395 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3396 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3398 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3400 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3401 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3402 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3403 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3404 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3405 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3406 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3407 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3408 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3410 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3413 Vbuffer_alist
= Qnil
;
3417 QSFundamental
= build_string ("Fundamental");
3419 Qfundamental_mode
= intern ("fundamental-mode");
3420 buffer_defaults
.major_mode
= Qfundamental_mode
;
3422 Qmode_class
= intern ("mode-class");
3424 Qprotected_field
= intern ("protected-field");
3426 Qpermanent_local
= intern ("permanent-local");
3428 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3430 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3432 /* super-magic invisible buffer */
3433 Vbuffer_alist
= Qnil
;
3435 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3440 char buf
[MAXPATHLEN
+1];
3442 struct stat dotstat
, pwdstat
;
3446 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3448 /* If PWD is accurate, use it instead of calling getwd. This is faster
3449 when PWD is right, and may avoid a fatal error. */
3450 if ((pwd
= getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd
)
3451 && stat (pwd
, &pwdstat
) == 0
3452 && stat (".", &dotstat
) == 0
3453 && dotstat
.st_ino
== pwdstat
.st_ino
3454 && dotstat
.st_dev
== pwdstat
.st_dev
3455 && strlen (pwd
) < MAXPATHLEN
)
3457 else if (getwd (buf
) == 0)
3458 fatal ("`getwd' failed: %s\n", buf
);
3461 /* Maybe this should really use some standard subroutine
3462 whose definition is filename syntax dependent. */
3464 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
3466 buf
[rc
] = DIRECTORY_SEP
;
3469 #endif /* not VMS */
3470 current_buffer
->directory
= build_string (buf
);
3472 temp
= get_minibuffer (0);
3473 XBUFFER (temp
)->directory
= current_buffer
->directory
;
3476 /* initialize the buffer routines */
3479 extern Lisp_Object Qdisabled
;
3481 staticpro (&last_overlay_modification_hooks
);
3482 last_overlay_modification_hooks
3483 = Fmake_vector (make_number (10), Qnil
);
3485 staticpro (&Vbuffer_defaults
);
3486 staticpro (&Vbuffer_local_symbols
);
3487 staticpro (&Qfundamental_mode
);
3488 staticpro (&Qmode_class
);
3489 staticpro (&QSFundamental
);
3490 staticpro (&Vbuffer_alist
);
3491 staticpro (&Qprotected_field
);
3492 staticpro (&Qpermanent_local
);
3493 staticpro (&Qkill_buffer_hook
);
3494 Qoverlayp
= intern ("overlayp");
3495 staticpro (&Qoverlayp
);
3496 Qevaporate
= intern ("evaporate");
3497 staticpro (&Qevaporate
);
3498 Qmodification_hooks
= intern ("modification-hooks");
3499 staticpro (&Qmodification_hooks
);
3500 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
3501 staticpro (&Qinsert_in_front_hooks
);
3502 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
3503 staticpro (&Qinsert_behind_hooks
);
3504 Qget_file_buffer
= intern ("get-file-buffer");
3505 staticpro (&Qget_file_buffer
);
3506 Qpriority
= intern ("priority");
3507 staticpro (&Qpriority
);
3508 Qwindow
= intern ("window");
3509 staticpro (&Qwindow
);
3510 Qbefore_string
= intern ("before-string");
3511 staticpro (&Qbefore_string
);
3512 Qafter_string
= intern ("after-string");
3513 staticpro (&Qafter_string
);
3514 Qfirst_change_hook
= intern ("first-change-hook");
3515 staticpro (&Qfirst_change_hook
);
3516 Qbefore_change_functions
= intern ("before-change-functions");
3517 staticpro (&Qbefore_change_functions
);
3518 Qafter_change_functions
= intern ("after-change-functions");
3519 staticpro (&Qafter_change_functions
);
3521 Fput (Qprotected_field
, Qerror_conditions
,
3522 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
3523 Fput (Qprotected_field
, Qerror_message
,
3524 build_string ("Attempt to modify a protected field"));
3526 /* All these use DEFVAR_LISP_NOPRO because the slots in
3527 buffer_defaults will all be marked via Vbuffer_defaults. */
3529 DEFVAR_LISP_NOPRO ("default-mode-line-format",
3530 &buffer_defaults
.mode_line_format
,
3531 "Default value of `mode-line-format' for buffers that don't override it.\n\
3532 This is the same as (default-value 'mode-line-format).");
3534 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
3535 &buffer_defaults
.abbrev_mode
,
3536 "Default value of `abbrev-mode' for buffers that do not override it.\n\
3537 This is the same as (default-value 'abbrev-mode).");
3539 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
3540 &buffer_defaults
.ctl_arrow
,
3541 "Default value of `ctl-arrow' for buffers that do not override it.\n\
3542 This is the same as (default-value 'ctl-arrow).");
3544 DEFVAR_LISP_NOPRO ("default-truncate-lines",
3545 &buffer_defaults
.truncate_lines
,
3546 "Default value of `truncate-lines' for buffers that do not override it.\n\
3547 This is the same as (default-value 'truncate-lines).");
3549 DEFVAR_LISP_NOPRO ("default-fill-column",
3550 &buffer_defaults
.fill_column
,
3551 "Default value of `fill-column' for buffers that do not override it.\n\
3552 This is the same as (default-value 'fill-column).");
3554 DEFVAR_LISP_NOPRO ("default-left-margin",
3555 &buffer_defaults
.left_margin
,
3556 "Default value of `left-margin' for buffers that do not override it.\n\
3557 This is the same as (default-value 'left-margin).");
3559 DEFVAR_LISP_NOPRO ("default-tab-width",
3560 &buffer_defaults
.tab_width
,
3561 "Default value of `tab-width' for buffers that do not override it.\n\
3562 This is the same as (default-value 'tab-width).");
3564 DEFVAR_LISP_NOPRO ("default-case-fold-search",
3565 &buffer_defaults
.case_fold_search
,
3566 "Default value of `case-fold-search' for buffers that don't override it.\n\
3567 This is the same as (default-value 'case-fold-search).");
3570 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
3571 &buffer_defaults
.buffer_file_type
,
3572 "Default file type for buffers that do not override it.\n\
3573 This is the same as (default-value 'buffer-file-type).\n\
3574 The file type is nil for text, t for binary.");
3577 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
3580 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
3581 But make-docfile finds it!
3582 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
3584 "Template for displaying mode line for current buffer.\n\
3585 Each buffer has its own value of this variable.\n\
3586 Value may be a string, a symbol or a list or cons cell.\n\
3587 For a symbol, its value is used (but it is ignored if t or nil).\n\
3588 A string appearing directly as the value of a symbol is processed verbatim\n\
3589 in that the %-constructs below are not recognized.\n\
3590 For a list whose car is a symbol, the symbol's value is taken,\n\
3591 and if that is non-nil, the cadr of the list is processed recursively.\n\
3592 Otherwise, the caddr of the list (if there is one) is processed.\n\
3593 For a list whose car is a string or list, each element is processed\n\
3594 recursively and the results are effectively concatenated.\n\
3595 For a list whose car is an integer, the cdr of the list is processed\n\
3596 and padded (if the number is positive) or truncated (if negative)\n\
3597 to the width specified by that number.\n\
3598 A string is printed verbatim in the mode line except for %-constructs:\n\
3599 (%-constructs are allowed when the string is the entire mode-line-format\n\
3600 or when it is found in a cons-cell or a list)\n\
3601 %b -- print buffer name. %f -- print visited file name.\n\
3602 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
3603 % means buffer is read-only and * means it is modified.\n\
3604 For a modified read-only buffer, %* gives % and %+ gives *.\n\
3605 %s -- print process status. %l -- print the current line number.\n\
3606 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
3607 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
3608 or print Bottom or All.\n\
3609 %n -- print Narrow if appropriate.\n\
3610 %t -- print T if files is text, B if binary.\n\
3611 %[ -- print one [ for each recursive editing level. %] similar.\n\
3612 %% -- print %. %- -- print infinitely many dashes.\n\
3613 Decimal digits after the % specify field width to which to pad.");
3616 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
3617 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
3618 nil here means use current buffer's major mode.");
3620 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
3621 make_number (Lisp_Symbol
),
3622 "Symbol for current buffer's major mode.");
3624 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
3625 make_number (Lisp_String
),
3626 "Pretty name of current buffer's major mode (a string).");
3628 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
3629 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
3630 Automatically becomes buffer-local when set in any fashion.");
3632 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
3634 "*Non-nil if searches should ignore case.\n\
3635 Automatically becomes buffer-local when set in any fashion.");
3637 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
3638 make_number (Lisp_Int
),
3639 "*Column beyond which automatic line-wrapping should happen.\n\
3640 Automatically becomes buffer-local when set in any fashion.");
3642 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
3643 make_number (Lisp_Int
),
3644 "*Column for the default indent-line-function to indent to.\n\
3645 Linefeed indents to this column in Fundamental mode.\n\
3646 Automatically becomes buffer-local when set in any fashion.");
3648 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
3649 make_number (Lisp_Int
),
3650 "*Distance between tab stops (for display of tab characters), in columns.\n\
3651 Automatically becomes buffer-local when set in any fashion.");
3653 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
3654 "*Non-nil means display control chars with uparrow.\n\
3655 Nil means use backslash and octal digits.\n\
3656 Automatically becomes buffer-local when set in any fashion.\n\
3657 This variable does not apply to characters whose display is specified\n\
3658 in the current display table (if there is one).");
3660 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
3661 "*Non-nil means do not display continuation lines;\n\
3662 give each line of text one screen line.\n\
3663 Automatically becomes buffer-local when set in any fashion.\n\
3665 Note that this is overridden by the variable\n\
3666 `truncate-partial-width-windows' if that variable is non-nil\n\
3667 and this buffer is not full-frame width.");
3670 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
3672 "Non-nil if the visited file is a binary file.\n\
3673 This variable is meaningful on MS-DOG and Windows NT.\n\
3674 On those systems, it is automatically local in every buffer.\n\
3675 On other systems, this variable is normally always nil.");
3678 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
3679 make_number (Lisp_String
),
3680 "Name of default directory of current buffer. Should end with slash.\n\
3681 Each buffer has its own value of this variable.");
3683 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
3685 "Function called (if non-nil) to perform auto-fill.\n\
3686 It is called after self-inserting a space at a column beyond `fill-column'.\n\
3687 Each buffer has its own value of this variable.\n\
3688 NOTE: This variable is not an ordinary hook;\n\
3689 It may not be a list of functions.");
3691 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
3692 make_number (Lisp_String
),
3693 "Name of file visited in current buffer, or nil if not visiting a file.\n\
3694 Each buffer has its own value of this variable.");
3696 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
3697 make_number (Lisp_String
),
3698 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
3699 The truename of a file is calculated by `file-truename'\n\
3700 and then abbreviated with `abbreviate-file-name'.\n\
3701 Each buffer has its own value of this variable.");
3703 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
3704 ¤t_buffer
->auto_save_file_name
,
3705 make_number (Lisp_String
),
3706 "Name of file for auto-saving current buffer,\n\
3707 or nil if buffer should not be auto-saved.\n\
3708 Each buffer has its own value of this variable.");
3710 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
3711 "Non-nil if this buffer is read-only.\n\
3712 Each buffer has its own value of this variable.");
3714 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
3715 "Non-nil if this buffer's file has been backed up.\n\
3716 Backing up is done before the first time the file is saved.\n\
3717 Each buffer has its own value of this variable.");
3719 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
3720 make_number (Lisp_Int
),
3721 "Length of current buffer when last read in, saved or auto-saved.\n\
3723 Each buffer has its own value of this variable.");
3725 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
3727 "Non-nil enables selective display:\n\
3728 Integer N as value means display only lines\n\
3729 that start with less than n columns of space.\n\
3730 A value of t means, after a ^M, all the rest of the line is invisible.\n\
3731 Then ^M's in the file are written into files as newlines.\n\n\
3732 Automatically becomes buffer-local when set in any fashion.");
3735 DEFVAR_PER_BUFFER ("selective-display-ellipses",
3736 ¤t_buffer
->selective_display_ellipses
,
3738 "t means display ... on previous line when a line is invisible.\n\
3739 Automatically becomes buffer-local when set in any fashion.");
3742 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
3743 "Non-nil if self-insertion should replace existing text.\n\
3744 The value should be one of `overwrite-mode-textual',\n\
3745 `overwrite-mode-binary', or nil.\n\
3746 If it is `overwrite-mode-textual', self-insertion still\n\
3747 inserts at the end of a line, and inserts when point is before a tab,\n\
3748 until the tab is filled in.\n\
3749 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
3750 Automatically becomes buffer-local when set in any fashion.");
3752 #if 0 /* The doc string is too long for some compilers,
3753 but make-docfile can find it in this comment. */
3754 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3756 "Display table that controls display of the contents of current buffer.\n\
3757 Automatically becomes buffer-local when set in any fashion.\n\
3758 The display table is a char-table created with `make-display-table'.\n\
3759 The ordinary char-table elements control how to display each possible text\n\
3760 character. Each value should be a vector of characters or nil;\n\
3761 nil means display the character in the default fashion.\n\
3762 There are six extra slots to control the display of\n\
3763 the end of a truncated screen line (extra-slot 0, a single character);\n\
3764 the end of a continued line (extra-slot 1, a single character);\n\
3765 the escape character used to display character codes in octal\n\
3766 (extra-slot 2, a single character);\n\
3767 the character used as an arrow for control characters (extra-slot 3,\n\
3768 a single character);\n\
3769 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
3770 a vector of characters);\n\
3771 the character used to draw the border between side-by-side windows\n\
3772 (extra-slot 5, a single character).\n\
3773 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
3774 If this variable is nil, the value of `standard-display-table' is used.\n\
3775 Each window can have its own, overriding display table.");
3777 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
3780 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
3783 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
3784 "Function to call before each text change.\n\
3785 Two arguments are passed to the function: the positions of\n\
3786 the beginning and end of the range of old text to be changed.\n\
3787 \(For an insertion, the beginning and end are at the same place.)\n\
3788 No information is given about the length of the text after the change.\n\
3790 Buffer changes made while executing the `before-change-function'\n\
3791 don't call any before-change or after-change functions.\n\
3792 That's because these variables are temporarily set to nil.\n\
3793 As a result, a hook function cannot straightforwardly alter the value of\n\
3794 these variables. See the Emacs Lisp manual for a way of\n\
3795 accomplishing an equivalent result by using other variables.");
3796 Vbefore_change_function
= Qnil
;
3798 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
3799 "Function to call after each text change.\n\
3800 Three arguments are passed to the function: the positions of\n\
3801 the beginning and end of the range of changed text,\n\
3802 and the length of the pre-change text replaced by that range.\n\
3803 \(For an insertion, the pre-change length is zero;\n\
3804 for a deletion, that length is the number of characters deleted,\n\
3805 and the post-change beginning and end are at the same place.)\n\
3807 Buffer changes made while executing the `after-change-function'\n\
3808 don't call any before-change or after-change functions.\n\
3809 That's because these variables are temporarily set to nil.\n\
3810 As a result, a hook function cannot straightforwardly alter the value of\n\
3811 these variables. See the Emacs Lisp manual for a way of\n\
3812 accomplishing an equivalent result by using other variables.");
3813 Vafter_change_function
= Qnil
;
3815 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
3816 "List of functions to call before each text change.\n\
3817 Two arguments are passed to each function: the positions of\n\
3818 the beginning and end of the range of old text to be changed.\n\
3819 \(For an insertion, the beginning and end are at the same place.)\n\
3820 No information is given about the length of the text after the change.\n\
3822 Buffer changes made while executing the `before-change-functions'\n\
3823 don't call any before-change or after-change functions.\n\
3824 That's because these variables are temporarily set to nil.\n\
3825 As a result, a hook function cannot straightforwardly alter the value of\n\
3826 these variables. See the Emacs Lisp manual for a way of\n\
3827 accomplishing an equivalent result by using other variables.");
3828 Vbefore_change_functions
= Qnil
;
3830 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
3831 "List of function to call after each text change.\n\
3832 Three arguments are passed to each function: the positions of\n\
3833 the beginning and end of the range of changed text,\n\
3834 and the length of the pre-change text replaced by that range.\n\
3835 \(For an insertion, the pre-change length is zero;\n\
3836 for a deletion, that length is the number of characters deleted,\n\
3837 and the post-change beginning and end are at the same place.)\n\
3839 Buffer changes made while executing the `after-change-functions'\n\
3840 don't call any before-change or after-change functions.\n\
3841 That's because these variables are temporarily set to nil.\n\
3842 As a result, a hook function cannot straightforwardly alter the value of\n\
3843 these variables. See the Emacs Lisp manual for a way of\n\
3844 accomplishing an equivalent result by using other variables.");
3846 Vafter_change_functions
= Qnil
;
3848 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
3849 "A list of functions to call before changing a buffer which is unmodified.\n\
3850 The functions are run using the `run-hooks' function.");
3851 Vfirst_change_hook
= Qnil
;
3853 #if 0 /* The doc string is too long for some compilers,
3854 but make-docfile can find it in this comment. */
3855 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3856 "List of undo entries in current buffer.\n\
3857 Recent changes come first; older changes follow newer.\n\
3859 An entry (BEG . END) represents an insertion which begins at\n\
3860 position BEG and ends at position END.\n\
3862 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
3863 from (abs POSITION). If POSITION is positive, point was at the front\n\
3864 of the text being deleted; if negative, point was at the end.\n\
3866 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
3867 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
3868 of the visited file's modification time, as of that time. If the\n\
3869 modification time of the most recent save is different, this entry is\n\
3872 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
3873 was modified between BEG and END. PROPERTY is the property name,\n\
3874 and VALUE is the old value.\n\
3876 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
3877 was adjusted in position by the offset DISTANCE (an integer).\n\
3879 An entry of the form POSITION indicates that point was at the buffer\n\
3880 location given by the integer. Undoing an entry of this form places\n\
3881 point at POSITION.\n\
3883 nil marks undo boundaries. The undo command treats the changes\n\
3884 between two undo boundaries as a single step to be undone.\n\
3886 If the value of the variable is t, undo information is not recorded.");
3888 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
3891 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
3892 "Non-nil means the mark and region are currently active in this buffer.\n\
3893 Automatically local in all buffers.");
3895 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
3896 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
3897 This variable is buffer-local, in all buffers.\n\
3899 Normally, the line-motion functions work by scanning the buffer for\n\
3900 newlines. Columnar operations (like move-to-column and\n\
3901 compute-motion) also work by scanning the buffer, summing character\n\
3902 widths as they go. This works well for ordinary text, but if the\n\
3903 buffer's lines are very long (say, more than 500 characters), these\n\
3904 motion functions will take longer to execute. Emacs may also take\n\
3905 longer to update the display.\n\
3907 If cache-long-line-scans is non-nil, these motion functions cache the\n\
3908 results of their scans, and consult the cache to avoid rescanning\n\
3909 regions of the buffer until the text is modified. The caches are most\n\
3910 beneficial when they prevent the most searching---that is, when the\n\
3911 buffer contains long lines and large regions of characters with the\n\
3912 same, fixed screen width.\n\
3914 When cache-long-line-scans is non-nil, processing short lines will\n\
3915 become slightly slower (because of the overhead of consulting the\n\
3916 cache), and the caches will use memory roughly proportional to the\n\
3917 number of newlines and characters whose screen width varies.\n\
3919 The caches require no explicit maintenance; their accuracy is\n\
3920 maintained internally by the Emacs primitives. Enabling or disabling\n\
3921 the cache should not affect the behavior of any of the motion\n\
3922 functions; it should only affect their performance.");
3924 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
3925 "Value of point before the last series of scroll operations, or nil.");
3927 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
3928 "List of formats to use when saving this buffer.\n\
3929 Formats are defined by `format-alist'. This variable is\n\
3930 set when a file is visited. Automatically local in all buffers.");
3932 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
3933 ¤t_buffer
->invisibility_spec
, Qnil
,
3934 "Invisibility spec of this buffer.\n\
3935 The default is t, which means that text is invisible\n\
3936 if it has a non-nil `invisible' property.\n\
3937 If the value is a list, a text character is invisible if its `invisible'\n\
3938 property is an element in that list.\n\
3939 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
3940 then characters with property value PROP are invisible,\n\
3941 and they have an ellipsis as well if ELLIPSIS is non-nil.");
3943 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
3944 "*Non-nil means deactivate the mark when the buffer contents change.");
3945 Vtransient_mark_mode
= Qnil
;
3947 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
3948 "*Non-nil means disregard read-only status of buffers or characters.\n\
3949 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
3950 text properties. If the value is a list, disregard `buffer-read-only'\n\
3951 and disregard a `read-only' text property if the property value\n\
3952 is a member of the list.");
3953 Vinhibit_read_only
= Qnil
;
3955 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
3956 "List of functions called with no args to query before killing a buffer.");
3957 Vkill_buffer_query_functions
= Qnil
;
3959 defsubr (&Sbuffer_live_p
);
3960 defsubr (&Sbuffer_list
);
3961 defsubr (&Sget_buffer
);
3962 defsubr (&Sget_file_buffer
);
3963 defsubr (&Sget_buffer_create
);
3964 defsubr (&Smake_indirect_buffer
);
3965 defsubr (&Sgenerate_new_buffer_name
);
3966 defsubr (&Sbuffer_name
);
3967 /*defsubr (&Sbuffer_number);*/
3968 defsubr (&Sbuffer_file_name
);
3969 defsubr (&Sbuffer_base_buffer
);
3970 defsubr (&Sbuffer_local_variables
);
3971 defsubr (&Sbuffer_modified_p
);
3972 defsubr (&Sset_buffer_modified_p
);
3973 defsubr (&Sbuffer_modified_tick
);
3974 defsubr (&Srename_buffer
);
3975 defsubr (&Sother_buffer
);
3976 defsubr (&Sbuffer_disable_undo
);
3977 defsubr (&Sbuffer_enable_undo
);
3978 defsubr (&Skill_buffer
);
3979 defsubr (&Serase_buffer
);
3980 defsubr (&Sset_buffer_major_mode
);
3981 defsubr (&Sswitch_to_buffer
);
3982 defsubr (&Spop_to_buffer
);
3983 defsubr (&Scurrent_buffer
);
3984 defsubr (&Sset_buffer
);
3985 defsubr (&Sbarf_if_buffer_read_only
);
3986 defsubr (&Sbury_buffer
);
3987 defsubr (&Skill_all_local_variables
);
3989 defsubr (&Soverlayp
);
3990 defsubr (&Smake_overlay
);
3991 defsubr (&Sdelete_overlay
);
3992 defsubr (&Smove_overlay
);
3993 defsubr (&Soverlay_start
);
3994 defsubr (&Soverlay_end
);
3995 defsubr (&Soverlay_buffer
);
3996 defsubr (&Soverlay_properties
);
3997 defsubr (&Soverlays_at
);
3998 defsubr (&Soverlays_in
);
3999 defsubr (&Snext_overlay_change
);
4000 defsubr (&Sprevious_overlay_change
);
4001 defsubr (&Soverlay_recenter
);
4002 defsubr (&Soverlay_lists
);
4003 defsubr (&Soverlay_get
);
4004 defsubr (&Soverlay_put
);
4009 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4010 initial_define_key (control_x_map
, 'k', "kill-buffer");
4012 /* This must not be in syms_of_buffer, because Qdisabled is not
4013 initialized when that function gets called. */
4014 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);