1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
25 #include <sys/param.h>
31 /* in 4.1, param.h fails to define this. */
32 #define MAXPATHLEN 1024
33 #endif /* not MAXPATHLEN */
43 #include "intervals.h"
48 #include "region-cache.h"
50 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 struct buffer buffer_defaults
;
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the bit for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_var_flags slot.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure is negative, then even though there may
90 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
91 and the corresponding slot in buffer_defaults is not used.
93 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
94 zero, that is a bug */
96 struct buffer buffer_local_flags
;
98 /* This structure holds the names of symbols whose values may be
99 buffer-local. It is indexed and accessed in the same way as the above. */
101 struct buffer buffer_local_symbols
;
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static int buffer_permanent_local_flags
;
120 Lisp_Object
Fset_buffer ();
121 void set_buffer_internal ();
122 void set_buffer_internal_1 ();
123 static void call_overlay_mod_hooks ();
124 static void swap_out_buffer_local_variables ();
125 static void reset_buffer_local_variables ();
127 /* Alist of all buffer names vs the buffers. */
128 /* This used to be a variable, but is no longer,
129 to prevent lossage due to user rplac'ing this alist or its elements. */
130 Lisp_Object Vbuffer_alist
;
132 /* Functions to call before and after each text change. */
133 Lisp_Object Vbefore_change_function
;
134 Lisp_Object Vafter_change_function
;
135 Lisp_Object Vbefore_change_functions
;
136 Lisp_Object Vafter_change_functions
;
138 Lisp_Object Vtransient_mark_mode
;
140 /* t means ignore all read-only text properties.
141 A list means ignore such a property if its value is a member of the list.
142 Any non-nil value means ignore buffer-read-only. */
143 Lisp_Object Vinhibit_read_only
;
145 /* List of functions to call that can query about killing a buffer.
146 If any of these functions returns nil, we don't kill it. */
147 Lisp_Object Vkill_buffer_query_functions
;
149 /* List of functions to call before changing an unmodified buffer. */
150 Lisp_Object Vfirst_change_hook
;
152 Lisp_Object Qfirst_change_hook
;
153 Lisp_Object Qbefore_change_functions
;
154 Lisp_Object Qafter_change_functions
;
156 /* If nonzero, all modification hooks are suppressed. */
157 int inhibit_modification_hooks
;
159 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
161 Lisp_Object Qprotected_field
;
163 Lisp_Object QSFundamental
; /* A string "Fundamental" */
165 Lisp_Object Qkill_buffer_hook
;
167 Lisp_Object Qget_file_buffer
;
169 Lisp_Object Qoverlayp
;
171 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
173 Lisp_Object Qmodification_hooks
;
174 Lisp_Object Qinsert_in_front_hooks
;
175 Lisp_Object Qinsert_behind_hooks
;
177 /* For debugging; temporary. See set_buffer_internal. */
178 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
185 error ("No buffer named %s", XSTRING (spec
)->data
);
186 error ("Invalid buffer argument");
189 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
190 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
191 Value is nil if OBJECT is not a buffer or if it has been killed.")
195 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
199 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
200 "Return a list of all existing live buffers.\n\
201 If the optional arg FRAME is a frame, we return that frame's buffer list.")
205 Lisp_Object framelist
, general
;
206 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
212 CHECK_FRAME (frame
, 1);
214 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
216 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
218 while (! NILP (tail
))
220 general
= Fdelq (XCONS (tail
)->car
, general
);
221 tail
= XCONS (tail
)->cdr
;
223 return nconc2 (framelist
, general
);
229 /* Like Fassoc, but use Fstring_equal to compare
230 (which ignores text properties),
231 and don't ever QUIT. */
234 assoc_ignore_text_properties (key
, list
)
235 register Lisp_Object key
;
238 register Lisp_Object tail
;
239 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
241 register Lisp_Object elt
, tem
;
243 tem
= Fstring_equal (Fcar (elt
), key
);
250 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
251 "Return the buffer named NAME (a string).\n\
252 If there is no live buffer named NAME, return nil.\n\
253 NAME may also be a buffer; if so, the value is that buffer.")
255 register Lisp_Object name
;
259 CHECK_STRING (name
, 0);
261 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
264 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
265 "Return the buffer visiting file FILENAME (a string).\n\
266 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
267 If there is no such live buffer, return nil.\n\
268 See also `find-buffer-visiting'.")
270 register Lisp_Object filename
;
272 register Lisp_Object tail
, buf
, tem
;
275 CHECK_STRING (filename
, 0);
276 filename
= Fexpand_file_name (filename
, Qnil
);
278 /* If the file name has special constructs in it,
279 call the corresponding file handler. */
280 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
282 return call2 (handler
, Qget_file_buffer
, filename
);
284 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
286 buf
= Fcdr (XCONS (tail
)->car
);
287 if (!BUFFERP (buf
)) continue;
288 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
289 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
297 get_truename_buffer (filename
)
298 register Lisp_Object filename
;
300 register Lisp_Object tail
, buf
, tem
;
302 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
304 buf
= Fcdr (XCONS (tail
)->car
);
305 if (!BUFFERP (buf
)) continue;
306 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
307 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
314 /* Incremented for each buffer created, to assign the buffer number. */
317 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
318 "Return the buffer named NAME, or create such a buffer and return it.\n\
319 A new buffer is created if there is no live buffer named NAME.\n\
320 If NAME starts with a space, the new buffer does not keep undo information.\n\
321 If NAME is a buffer instead of a string, then it is the value returned.\n\
322 The value is never nil.")
324 register Lisp_Object name
;
326 register Lisp_Object buf
;
327 register struct buffer
*b
;
329 buf
= Fget_buffer (name
);
333 if (XSTRING (name
)->size
== 0)
334 error ("Empty string for buffer name is not allowed");
336 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
338 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
340 /* An ordinary buffer uses its own struct buffer_text. */
341 b
->text
= &b
->own_text
;
344 BUF_GAP_SIZE (b
) = 20;
346 /* We allocate extra 1-byte at the tail and keep it always '\0' for
347 anchoring a search. */
348 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
350 if (! BUF_BEG_ADDR (b
))
351 buffer_memory_full ();
359 BUF_GPT_BYTE (b
) = 1;
360 BUF_BEGV_BYTE (b
) = 1;
364 BUF_OVERLAY_MODIFF (b
) = 1;
365 BUF_SAVE_MODIFF (b
) = 1;
366 BUF_INTERVALS (b
) = 0;
367 BUF_UNCHANGED_MODIFIED (b
) = 1;
368 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
369 BUF_END_UNCHANGED (b
) = 0;
370 BUF_BEG_UNCHANGED (b
) = 0;
371 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
373 b
->newline_cache
= 0;
374 b
->width_run_cache
= 0;
375 b
->width_table
= Qnil
;
376 b
->minibuffer_prompt_length
= Qnil
;
377 b
->prevent_redisplay_optimizations_p
= 1;
379 /* Put this on the chain of all buffers including killed ones. */
380 b
->next
= all_buffers
;
383 /* An ordinary buffer normally doesn't need markers
384 to handle BEGV and ZV. */
386 b
->begv_marker
= Qnil
;
389 name
= Fcopy_sequence (name
);
390 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
393 if (XSTRING (name
)->data
[0] != ' ')
399 reset_buffer_local_variables (b
, 1);
401 /* Put this in the alist of all live buffers. */
403 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
405 b
->mark
= Fmake_marker ();
406 BUF_MARKERS (b
) = Qnil
;
411 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
412 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
413 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
414 BASE-BUFFER should be an existing buffer (or buffer name).\n\
415 NAME should be a string which is not the name of an existing buffer.")
417 register Lisp_Object base_buffer
, name
;
419 register Lisp_Object buf
;
420 register struct buffer
*b
;
422 buf
= Fget_buffer (name
);
424 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
426 base_buffer
= Fget_buffer (base_buffer
);
427 if (NILP (base_buffer
))
428 error ("No such buffer: `%s'",
429 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
431 if (XSTRING (name
)->size
== 0)
432 error ("Empty string for buffer name is not allowed");
434 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
436 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
438 if (XBUFFER (base_buffer
)->base_buffer
)
439 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
441 b
->base_buffer
= XBUFFER (base_buffer
);
443 /* Use the base buffer's text object. */
444 b
->text
= b
->base_buffer
->text
;
446 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
447 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
448 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
449 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
450 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
451 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
453 b
->newline_cache
= 0;
454 b
->width_run_cache
= 0;
455 b
->width_table
= Qnil
;
456 b
->minibuffer_prompt_length
= Qnil
;
458 /* Put this on the chain of all buffers including killed ones. */
459 b
->next
= all_buffers
;
462 name
= Fcopy_sequence (name
);
463 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
467 reset_buffer_local_variables (b
, 1);
469 /* Put this in the alist of all live buffers. */
471 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
473 b
->mark
= Fmake_marker ();
476 /* The multibyte status belongs to the base buffer. */
477 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
479 /* Make sure the base buffer has markers for its narrowing. */
480 if (NILP (b
->base_buffer
->pt_marker
))
482 b
->base_buffer
->pt_marker
= Fmake_marker ();
483 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
484 BUF_PT (b
->base_buffer
),
485 BUF_PT_BYTE (b
->base_buffer
));
487 if (NILP (b
->base_buffer
->begv_marker
))
489 b
->base_buffer
->begv_marker
= Fmake_marker ();
490 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
491 BUF_BEGV (b
->base_buffer
),
492 BUF_BEGV_BYTE (b
->base_buffer
));
494 if (NILP (b
->base_buffer
->zv_marker
))
496 b
->base_buffer
->zv_marker
= Fmake_marker ();
497 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
498 BUF_ZV (b
->base_buffer
),
499 BUF_ZV_BYTE (b
->base_buffer
));
500 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
503 /* Give the indirect buffer markers for its narrowing. */
504 b
->pt_marker
= Fmake_marker ();
505 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
506 b
->begv_marker
= Fmake_marker ();
507 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
508 b
->zv_marker
= Fmake_marker ();
509 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
510 XMARKER (b
->zv_marker
)->insertion_type
= 1;
515 /* Reinitialize everything about a buffer except its name and contents
516 and local variables. */
520 register struct buffer
*b
;
523 b
->file_truename
= Qnil
;
524 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
526 XSETFASTINT (b
->save_length
, 0);
527 b
->last_window_start
= 1;
528 /* It is more conservative to start out "changed" than "unchanged". */
530 b
->prevent_redisplay_optimizations_p
= 1;
532 b
->auto_save_modified
= 0;
533 b
->auto_save_failure_time
= -1;
534 b
->auto_save_file_name
= Qnil
;
536 b
->overlays_before
= Qnil
;
537 b
->overlays_after
= Qnil
;
538 XSETFASTINT (b
->overlay_center
, 1);
539 b
->mark_active
= Qnil
;
540 b
->point_before_scroll
= Qnil
;
541 b
->file_format
= Qnil
;
542 b
->last_selected_window
= Qnil
;
543 XSETINT (b
->display_count
, 0);
544 b
->display_time
= Qnil
;
547 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
550 /* Reset buffer B's local variables info.
551 Don't use this on a buffer that has already been in use;
552 it does not treat permanent locals consistently.
553 Instead, use Fkill_all_local_variables.
555 If PERMANENT_TOO is 1, then we reset permanent built-in
556 buffer-local variables. If PERMANENT_TOO is 0,
557 we preserve those. */
560 reset_buffer_local_variables (b
, permanent_too
)
561 register struct buffer
*b
;
567 /* Decide which built-in local variables to reset. */
571 dont_reset
= buffer_permanent_local_flags
;
573 /* Reset the major mode to Fundamental, together with all the
574 things that depend on the major mode.
575 default-major-mode is handled at a higher level.
576 We ignore it here. */
577 b
->major_mode
= Qfundamental_mode
;
579 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
580 b
->mode_name
= QSFundamental
;
581 b
->minor_modes
= Qnil
;
583 /* If the standard case table has been altered and invalidated,
584 fix up its insides first. */
585 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
586 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
587 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
588 Fset_standard_case_table (Vascii_downcase_table
);
590 b
->downcase_table
= Vascii_downcase_table
;
591 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
592 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
593 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
594 b
->invisibility_spec
= Qt
;
596 b
->buffer_file_type
= Qnil
;
600 b
->sort_table
= XSTRING (Vascii_sort_table
);
601 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
604 /* Reset all (or most) per-buffer variables to their defaults. */
605 b
->local_var_alist
= Qnil
;
606 b
->local_var_flags
&= dont_reset
;
608 /* For each slot that has a default value,
609 copy that into the slot. */
611 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
612 offset
< sizeof (struct buffer
);
613 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
615 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
617 /* Don't reset a permanent local. */
618 && ! (dont_reset
& flag
))
620 *(Lisp_Object
*)(offset
+ (char *)b
)
621 = *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
625 /* We split this away from generate-new-buffer, because rename-buffer
626 and set-visited-file-name ought to be able to use this to really
627 rename the buffer properly. */
629 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
631 "Return a string that is the name of no existing buffer based on NAME.\n\
632 If there is no live buffer named NAME, then return NAME.\n\
633 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
634 until an unused name is found, and then return that name.\n\
635 Optional second argument IGNORE specifies a name that is okay to use\n\
636 \(if it is in the sequence to be tried)\n\
637 even if a buffer with that name exists.")
639 register Lisp_Object name
, ignore
;
641 register Lisp_Object gentemp
, tem
;
645 CHECK_STRING (name
, 0);
647 tem
= Fget_buffer (name
);
654 sprintf (number
, "<%d>", ++count
);
655 gentemp
= concat2 (name
, build_string (number
));
656 tem
= Fstring_equal (gentemp
, ignore
);
659 tem
= Fget_buffer (gentemp
);
666 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
667 "Return the name of BUFFER, as a string.\n\
668 With no argument or nil as argument, return the name of the current buffer.")
670 register Lisp_Object buffer
;
673 return current_buffer
->name
;
674 CHECK_BUFFER (buffer
, 0);
675 return XBUFFER (buffer
)->name
;
678 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
679 "Return name of file BUFFER is visiting, or nil if none.\n\
680 No argument or nil as argument means use the current buffer.")
682 register Lisp_Object buffer
;
685 return current_buffer
->filename
;
686 CHECK_BUFFER (buffer
, 0);
687 return XBUFFER (buffer
)->filename
;
690 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
692 "Return the base buffer of indirect buffer BUFFER.\n\
693 If BUFFER is not indirect, return nil.")
695 register Lisp_Object buffer
;
698 Lisp_Object base_buffer
;
701 base
= current_buffer
->base_buffer
;
704 CHECK_BUFFER (buffer
, 0);
705 base
= XBUFFER (buffer
)->base_buffer
;
710 XSETBUFFER (base_buffer
, base
);
714 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
715 Sbuffer_local_variables
, 0, 1, 0,
716 "Return an alist of variables that are buffer-local in BUFFER.\n\
717 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
718 For a symbol that is locally unbound, just the symbol appears in the value.\n\
719 Note that storing new VALUEs in these elements doesn't change the variables.\n\
720 No argument or nil as argument means use current buffer as BUFFER.")
722 register Lisp_Object buffer
;
724 register struct buffer
*buf
;
725 register Lisp_Object result
;
728 buf
= current_buffer
;
731 CHECK_BUFFER (buffer
, 0);
732 buf
= XBUFFER (buffer
);
738 register Lisp_Object tail
;
739 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
741 Lisp_Object val
, elt
;
743 elt
= XCONS (tail
)->car
;
745 /* Reference each variable in the alist in buf.
746 If inquiring about the current buffer, this gets the current values,
747 so store them into the alist so the alist is up to date.
748 If inquiring about some other buffer, this swaps out any values
749 for that buffer, making the alist up to date automatically. */
750 val
= find_symbol_value (XCONS (elt
)->car
);
751 /* Use the current buffer value only if buf is the current buffer. */
752 if (buf
!= current_buffer
)
753 val
= XCONS (elt
)->cdr
;
755 /* If symbol is unbound, put just the symbol in the list. */
756 if (EQ (val
, Qunbound
))
757 result
= Fcons (XCONS (elt
)->car
, result
);
758 /* Otherwise, put (symbol . value) in the list. */
760 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
764 /* Add on all the variables stored in special slots. */
766 register int offset
, mask
;
768 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
769 offset
< sizeof (struct buffer
);
770 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
772 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
773 if (mask
== -1 || (buf
->local_var_flags
& mask
))
774 if (SYMBOLP (*(Lisp_Object
*)(offset
775 + (char *)&buffer_local_symbols
)))
776 result
= Fcons (Fcons (*((Lisp_Object
*)
777 (offset
+ (char *)&buffer_local_symbols
)),
778 *(Lisp_Object
*)(offset
+ (char *)buf
)),
787 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
789 "Return t if BUFFER was modified since its file was last read or saved.\n\
790 No argument or nil as argument means use current buffer as BUFFER.")
792 register Lisp_Object buffer
;
794 register struct buffer
*buf
;
796 buf
= current_buffer
;
799 CHECK_BUFFER (buffer
, 0);
800 buf
= XBUFFER (buffer
);
803 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
806 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
808 "Mark current buffer as modified or unmodified according to FLAG.\n\
809 A non-nil FLAG means mark the buffer modified.")
811 register Lisp_Object flag
;
813 register int already
;
814 register Lisp_Object fn
;
816 #ifdef CLASH_DETECTION
817 /* If buffer becoming modified, lock the file.
818 If buffer becoming unmodified, unlock the file. */
820 fn
= current_buffer
->file_truename
;
821 /* Test buffer-file-name so that binding it to nil is effective. */
822 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
824 already
= SAVE_MODIFF
< MODIFF
;
825 if (!already
&& !NILP (flag
))
827 else if (already
&& NILP (flag
))
830 #endif /* CLASH_DETECTION */
832 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
837 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
839 "Return BUFFER's tick counter, incremented for each change in text.\n\
840 Each buffer has a tick counter which is incremented each time the text in\n\
841 that buffer is changed. It wraps around occasionally.\n\
842 No argument or nil as argument means use current buffer as BUFFER.")
844 register Lisp_Object buffer
;
846 register struct buffer
*buf
;
848 buf
= current_buffer
;
851 CHECK_BUFFER (buffer
, 0);
852 buf
= XBUFFER (buffer
);
855 return make_number (BUF_MODIFF (buf
));
858 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
859 "sRename buffer (to new name): \nP",
860 "Change current buffer's name to NEWNAME (a string).\n\
861 If second arg UNIQUE is nil or omitted, it is an error if a\n\
862 buffer named NEWNAME already exists.\n\
863 If UNIQUE is non-nil, come up with a new name using\n\
864 `generate-new-buffer-name'.\n\
865 Interactively, you can set UNIQUE with a prefix argument.\n\
866 We return the name we actually gave the buffer.\n\
867 This does not change the name of the visited file (if any).")
869 register Lisp_Object newname
, unique
;
871 register Lisp_Object tem
, buf
;
873 CHECK_STRING (newname
, 0);
875 if (XSTRING (newname
)->size
== 0)
876 error ("Empty string is invalid as a buffer name");
878 tem
= Fget_buffer (newname
);
879 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
880 the buffer automatically so you can create another with the original name.
881 It makes UNIQUE equivalent to
882 (rename-buffer (generate-new-buffer-name NEWNAME)). */
883 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
884 return current_buffer
->name
;
888 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
890 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
893 current_buffer
->name
= newname
;
895 /* Catch redisplay's attention. Unless we do this, the mode lines for
896 any windows displaying current_buffer will stay unchanged. */
899 XSETBUFFER (buf
, current_buffer
);
900 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
901 if (NILP (current_buffer
->filename
)
902 && !NILP (current_buffer
->auto_save_file_name
))
903 call0 (intern ("rename-auto-save-file"));
904 /* Refetch since that last call may have done GC. */
905 return current_buffer
->name
;
908 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
909 "Return most recently selected buffer other than BUFFER.\n\
910 Buffers not visible in windows are preferred to visible buffers,\n\
911 unless optional second argument VISIBLE-OK is non-nil.\n\
912 If the optional third argument FRAME is non-nil, use that frame's\n\
913 buffer list instead of the selected frame's buffer list.\n\
914 If no other buffer exists, the buffer `*scratch*' is returned.\n\
915 If BUFFER is omitted or nil, some interesting buffer is returned.")
916 (buffer
, visible_ok
, frame
)
917 register Lisp_Object buffer
, visible_ok
, frame
;
919 Lisp_Object
Fset_buffer_major_mode ();
920 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
924 frame
= Fselected_frame ();
926 tail
= Vbuffer_alist
;
927 pred
= frame_buffer_predicate (frame
);
929 /* Consider buffers that have been seen in the selected frame
930 before other buffers. */
932 tem
= frame_buffer_list (frame
);
936 if (BUFFERP (XCONS (tem
)->car
))
937 add_ons
= Fcons (Fcons (Qnil
, XCONS (tem
)->car
), add_ons
);
938 tem
= XCONS (tem
)->cdr
;
940 tail
= nconc2 (Fnreverse (add_ons
), tail
);
942 for (; !NILP (tail
); tail
= Fcdr (tail
))
944 buf
= Fcdr (Fcar (tail
));
945 if (EQ (buf
, buffer
))
947 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
949 /* If the selected frame has a buffer_predicate,
950 disregard buffers that don't fit the predicate. */
953 tem
= call1 (pred
, buf
);
958 if (NILP (visible_ok
))
959 tem
= Fget_buffer_window (buf
, Qt
);
964 if (NILP (notsogood
))
967 if (!NILP (notsogood
))
969 buf
= Fget_buffer_create (build_string ("*scratch*"));
970 Fset_buffer_major_mode (buf
);
974 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
976 "Make BUFFER stop keeping undo information.\n\
977 No argument or nil as argument means do this for the current buffer.")
979 register Lisp_Object buffer
;
981 Lisp_Object real_buffer
;
984 XSETBUFFER (real_buffer
, current_buffer
);
987 real_buffer
= Fget_buffer (buffer
);
988 if (NILP (real_buffer
))
992 XBUFFER (real_buffer
)->undo_list
= Qt
;
997 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
999 "Start keeping undo information for buffer BUFFER.\n\
1000 No argument or nil as argument means do this for the current buffer.")
1002 register Lisp_Object buffer
;
1004 Lisp_Object real_buffer
;
1007 XSETBUFFER (real_buffer
, current_buffer
);
1010 real_buffer
= Fget_buffer (buffer
);
1011 if (NILP (real_buffer
))
1015 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1016 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1022 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1023 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1024 The buffer being killed will be current while the hook is running.\n\
1027 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1028 "Kill the buffer BUFFER.\n\
1029 The argument may be a buffer or may be the name of a buffer.\n\
1030 An argument of nil means kill the current buffer.\n\n\
1031 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1032 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1033 if not void, is a list of functions to be called, with no arguments,\n\
1034 before the buffer is actually killed. The buffer to be killed is current\n\
1035 when the hook functions are called.\n\n\
1036 Any processes that have this buffer as the `process-buffer' are killed\n\
1042 register struct buffer
*b
;
1043 register Lisp_Object tem
;
1044 register struct Lisp_Marker
*m
;
1045 struct gcpro gcpro1
, gcpro2
;
1048 buf
= Fcurrent_buffer ();
1050 buf
= Fget_buffer (buffer
);
1056 /* Avoid trouble for buffer already dead. */
1060 /* Query if the buffer is still modified. */
1061 if (INTERACTIVE
&& !NILP (b
->filename
)
1062 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1065 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1066 XSTRING (b
->name
)->data
));
1072 /* Run hooks with the buffer to be killed the current buffer. */
1074 register Lisp_Object val
;
1075 int count
= specpdl_ptr
- specpdl
;
1078 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1079 set_buffer_internal (b
);
1081 /* First run the query functions; if any query is answered no,
1082 don't kill the buffer. */
1083 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1085 tem
= call0 (Fcar (list
));
1087 return unbind_to (count
, Qnil
);
1090 /* Then run the hooks. */
1091 if (!NILP (Vrun_hooks
))
1092 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1093 unbind_to (count
, Qnil
);
1096 /* We have no more questions to ask. Verify that it is valid
1097 to kill the buffer. This must be done after the questions
1098 since anything can happen within do_yes_or_no_p. */
1100 /* Don't kill the minibuffer now current. */
1101 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1107 /* When we kill a base buffer, kill all its indirect buffers.
1108 We do it at this stage so nothing terrible happens if they
1109 ask questions or their hooks get errors. */
1110 if (! b
->base_buffer
)
1112 struct buffer
*other
;
1116 for (other
= all_buffers
; other
; other
= other
->next
)
1117 /* all_buffers contains dead buffers too;
1118 don't re-kill them. */
1119 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1122 XSETBUFFER (buf
, other
);
1129 /* Make this buffer not be current.
1130 In the process, notice if this is the sole visible buffer
1131 and give up if so. */
1132 if (b
== current_buffer
)
1134 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1136 if (b
== current_buffer
)
1140 /* Now there is no question: we can kill the buffer. */
1142 #ifdef CLASH_DETECTION
1143 /* Unlock this buffer's file, if it is locked. */
1145 #endif /* CLASH_DETECTION */
1147 kill_buffer_processes (buf
);
1149 tem
= Vinhibit_quit
;
1151 replace_buffer_in_all_windows (buf
);
1152 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1153 frames_discard_buffer (buf
);
1154 Vinhibit_quit
= tem
;
1156 /* Delete any auto-save file, if we saved it in this session. */
1157 if (STRINGP (b
->auto_save_file_name
)
1158 && b
->auto_save_modified
!= 0
1159 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1162 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1164 internal_delete_file (b
->auto_save_file_name
);
1169 /* Unchain all markers that belong to this indirect buffer.
1170 Don't unchain the markers that belong to the base buffer
1171 or its other indirect buffers. */
1172 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1178 unchain_marker (tem
);
1184 /* Unchain all markers of this buffer and its indirect buffers.
1185 and leave them pointing nowhere. */
1186 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1193 BUF_MARKERS (b
) = Qnil
;
1195 #ifdef USE_TEXT_PROPERTIES
1196 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1199 /* Perhaps we should explicitly free the interval tree here... */
1202 /* Reset the local variables, so that this buffer's local values
1203 won't be protected from GC. They would be protected
1204 if they happened to remain encached in their symbols.
1205 This gets rid of them for certain. */
1206 swap_out_buffer_local_variables (b
);
1207 reset_buffer_local_variables (b
, 1);
1212 if (! b
->base_buffer
)
1213 BUFFER_FREE (BUF_BEG_ADDR (b
));
1215 if (b
->newline_cache
)
1217 free_region_cache (b
->newline_cache
);
1218 b
->newline_cache
= 0;
1220 if (b
->width_run_cache
)
1222 free_region_cache (b
->width_run_cache
);
1223 b
->width_run_cache
= 0;
1225 b
->width_table
= Qnil
;
1226 b
->minibuffer_prompt_length
= Qnil
;
1228 b
->undo_list
= Qnil
;
1233 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1234 we do this each time BUF is selected visibly, the more recently
1235 selected buffers are always closer to the front of the list. This
1236 means that other_buffer is more likely to choose a relevant buffer. */
1242 register Lisp_Object link
, prev
;
1244 frame
= Fselected_frame ();
1247 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1249 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1254 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1255 we cannot use Fdelq itself here because it allows quitting. */
1258 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1260 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1262 XCONS (link
)->cdr
= Vbuffer_alist
;
1263 Vbuffer_alist
= link
;
1265 /* Now move this buffer to the front of frame_buffer_list also. */
1268 for (link
= frame_buffer_list (frame
); CONSP (link
);
1269 link
= XCONS (link
)->cdr
)
1271 if (EQ (XCONS (link
)->car
, buf
))
1276 /* Effectively do delq. */
1281 set_frame_buffer_list (frame
,
1282 XCONS (frame_buffer_list (frame
))->cdr
);
1284 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1286 XCONS (link
)->cdr
= frame_buffer_list (frame
);
1287 set_frame_buffer_list (frame
, link
);
1290 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1293 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1294 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1295 Use this function before selecting the buffer, since it may need to inspect\n\
1296 the current buffer's major mode.")
1301 Lisp_Object function
;
1303 function
= buffer_defaults
.major_mode
;
1304 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1305 function
= current_buffer
->major_mode
;
1307 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1310 count
= specpdl_ptr
- specpdl
;
1312 /* To select a nonfundamental mode,
1313 select the buffer temporarily and then call the mode function. */
1315 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1317 Fset_buffer (buffer
);
1320 return unbind_to (count
, Qnil
);
1323 /* If switching buffers in WINDOW would be an error, return
1324 a C string saying what the error would be. */
1327 no_switch_window (window
)
1331 if (EQ (minibuf_window
, window
))
1332 return "Cannot switch buffers in minibuffer window";
1333 tem
= Fwindow_dedicated_p (window
);
1335 return "Cannot switch buffers in a dedicated window";
1339 /* Switch to buffer BUFFER in the selected window.
1340 If NORECORD is non-nil, don't call record_buffer. */
1343 switch_to_buffer_1 (buffer
, norecord
)
1344 Lisp_Object buffer
, norecord
;
1346 register Lisp_Object buf
;
1349 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1352 buf
= Fget_buffer (buffer
);
1355 buf
= Fget_buffer_create (buffer
);
1356 Fset_buffer_major_mode (buf
);
1360 if (NILP (norecord
))
1361 record_buffer (buf
);
1363 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1364 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1371 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1372 "Select buffer BUFFER in the current window.\n\
1373 BUFFER may be a buffer or a buffer name.\n\
1374 Optional second arg NORECORD non-nil means\n\
1375 do not put this buffer at the front of the list of recently selected ones.\n\
1377 WARNING: This is NOT the way to work on another buffer temporarily\n\
1378 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1379 the window-buffer correspondences.")
1381 Lisp_Object buffer
, norecord
;
1385 err
= no_switch_window (selected_window
);
1386 if (err
) error (err
);
1388 return switch_to_buffer_1 (buffer
, norecord
);
1391 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1392 "Select buffer BUFFER in some window, preferably a different one.\n\
1393 If BUFFER is nil, then some other buffer is chosen.\n\
1394 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1395 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1396 window even if BUFFER is already visible in the selected window.\n\
1397 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1398 of `display-buffer' for additional customization information.\n\
1400 Optional third arg NORECORD non-nil means\n\
1401 do not put this buffer at the front of the list of recently selected ones.")
1402 (buffer
, other_window
, norecord
)
1403 Lisp_Object buffer
, other_window
, norecord
;
1405 register Lisp_Object buf
;
1407 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1410 buf
= Fget_buffer (buffer
);
1413 buf
= Fget_buffer_create (buffer
);
1414 Fset_buffer_major_mode (buf
);
1418 if (NILP (norecord
))
1419 record_buffer (buf
);
1420 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1424 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1425 "Return the current buffer as a Lisp object.")
1428 register Lisp_Object buf
;
1429 XSETBUFFER (buf
, current_buffer
);
1433 /* Set the current buffer to B. */
1436 set_buffer_internal (b
)
1437 register struct buffer
*b
;
1439 if (current_buffer
!= b
)
1441 /* Set windows_or_buffers_changed only if buffer is displayed
1442 somewhere. This enables redisplay optimizations if a
1443 background task like deferred fontification changes buffers,
1444 but none that are currently displayed. */
1445 if (!windows_or_buffers_changed
1449 XSETBUFFER (buffer
, b
);
1450 if (!NILP (Fget_buffer_window (buffer
, Qvisible
)))
1451 ++windows_or_buffers_changed
;
1454 set_buffer_internal_1 (b
);
1458 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1459 This is used by redisplay. */
1462 set_buffer_internal_1 (b
)
1463 register struct buffer
*b
;
1465 register struct buffer
*old_buf
;
1466 register Lisp_Object tail
, valcontents
;
1469 if (current_buffer
== b
)
1472 old_buf
= current_buffer
;
1474 last_known_column_point
= -1; /* invalidate indentation cache */
1478 /* Put the undo list back in the base buffer, so that it appears
1479 that an indirect buffer shares the undo list of its base. */
1480 if (old_buf
->base_buffer
)
1481 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1483 /* If the old current buffer has markers to record PT, BEGV and ZV
1484 when it is not current, update them now. */
1485 if (! NILP (old_buf
->pt_marker
))
1488 XSETBUFFER (obuf
, old_buf
);
1489 set_marker_both (old_buf
->pt_marker
, obuf
,
1490 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1492 if (! NILP (old_buf
->begv_marker
))
1495 XSETBUFFER (obuf
, old_buf
);
1496 set_marker_both (old_buf
->begv_marker
, obuf
,
1497 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1499 if (! NILP (old_buf
->zv_marker
))
1502 XSETBUFFER (obuf
, old_buf
);
1503 set_marker_both (old_buf
->zv_marker
, obuf
,
1504 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1508 /* Get the undo list from the base buffer, so that it appears
1509 that an indirect buffer shares the undo list of its base. */
1511 b
->undo_list
= b
->base_buffer
->undo_list
;
1513 /* If the new current buffer has markers to record PT, BEGV and ZV
1514 when it is not current, fetch them now. */
1515 if (! NILP (b
->pt_marker
))
1517 BUF_PT (b
) = marker_position (b
->pt_marker
);
1518 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1520 if (! NILP (b
->begv_marker
))
1522 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1523 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1525 if (! NILP (b
->zv_marker
))
1527 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1528 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1531 /* Look down buffer's list of local Lisp variables
1532 to find and update any that forward into C variables. */
1534 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1536 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1537 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1538 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1539 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1540 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1541 /* Just reference the variable
1542 to cause it to become set for this buffer. */
1543 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1546 /* Do the same with any others that were local to the previous buffer */
1549 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1551 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1552 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1553 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1554 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1555 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1556 /* Just reference the variable
1557 to cause it to become set for this buffer. */
1558 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1562 /* Switch to buffer B temporarily for redisplay purposes.
1563 This avoids certain things that don't need to be done within redisplay. */
1569 register struct buffer
*old_buf
;
1571 if (current_buffer
== b
)
1574 old_buf
= current_buffer
;
1579 /* If the old current buffer has markers to record PT, BEGV and ZV
1580 when it is not current, update them now. */
1581 if (! NILP (old_buf
->pt_marker
))
1584 XSETBUFFER (obuf
, old_buf
);
1585 set_marker_both (old_buf
->pt_marker
, obuf
,
1586 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1588 if (! NILP (old_buf
->begv_marker
))
1591 XSETBUFFER (obuf
, old_buf
);
1592 set_marker_both (old_buf
->begv_marker
, obuf
,
1593 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1595 if (! NILP (old_buf
->zv_marker
))
1598 XSETBUFFER (obuf
, old_buf
);
1599 set_marker_both (old_buf
->zv_marker
, obuf
,
1600 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1604 /* If the new current buffer has markers to record PT, BEGV and ZV
1605 when it is not current, fetch them now. */
1606 if (! NILP (b
->pt_marker
))
1608 BUF_PT (b
) = marker_position (b
->pt_marker
);
1609 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1611 if (! NILP (b
->begv_marker
))
1613 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1614 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1616 if (! NILP (b
->zv_marker
))
1618 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1619 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1623 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1624 "Make the buffer BUFFER current for editing operations.\n\
1625 BUFFER may be a buffer or the name of an existing buffer.\n\
1626 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1627 This function does not display the buffer, so its effect ends\n\
1628 when the current command terminates.\n\
1629 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1631 register Lisp_Object buffer
;
1633 register Lisp_Object buf
;
1634 buf
= Fget_buffer (buffer
);
1637 if (NILP (XBUFFER (buf
)->name
))
1638 error ("Selecting deleted buffer");
1639 set_buffer_internal (XBUFFER (buf
));
1643 /* Set the current buffer to BUFFER provided it is alive. */
1646 set_buffer_if_live (buffer
)
1649 if (! NILP (XBUFFER (buffer
)->name
))
1650 Fset_buffer (buffer
);
1654 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1655 Sbarf_if_buffer_read_only
, 0, 0, 0,
1656 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1659 if (!NILP (current_buffer
->read_only
)
1660 && NILP (Vinhibit_read_only
))
1661 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1665 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1666 "Put BUFFER at the end of the list of all buffers.\n\
1667 There it is the least likely candidate for `other-buffer' to return;\n\
1668 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1669 If BUFFER is nil or omitted, bury the current buffer.\n\
1670 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1671 selected window if it is displayed there.")
1673 register Lisp_Object buffer
;
1675 /* Figure out what buffer we're going to bury. */
1678 XSETBUFFER (buffer
, current_buffer
);
1680 /* If we're burying the current buffer, unshow it. */
1681 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1687 buf1
= Fget_buffer (buffer
);
1693 /* Move buffer to the end of the buffer list. */
1695 register Lisp_Object aelt
, link
;
1697 aelt
= Frassq (buffer
, Vbuffer_alist
);
1698 link
= Fmemq (aelt
, Vbuffer_alist
);
1699 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1700 XCONS (link
)->cdr
= Qnil
;
1701 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1704 frames_bury_buffer (buffer
);
1709 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1710 "Delete the entire contents of the current buffer.\n\
1711 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1712 so the buffer is truly empty after this.")
1717 current_buffer
->last_window_start
= 1;
1718 /* Prevent warnings, or suspension of auto saving, that would happen
1719 if future size is less than past size. Use of erase-buffer
1720 implies that the future text is not really related to the past text. */
1721 XSETFASTINT (current_buffer
->save_length
, 0);
1726 validate_region (b
, e
)
1727 register Lisp_Object
*b
, *e
;
1729 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1730 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1732 if (XINT (*b
) > XINT (*e
))
1735 tem
= *b
; *b
= *e
; *e
= tem
;
1738 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1739 && XINT (*e
) <= ZV
))
1740 args_out_of_range (*b
, *e
);
1743 /* Advance BYTE_POS up to a character boundary
1744 and return the adjusted position. */
1747 advance_to_char_boundary (byte_pos
)
1752 if (byte_pos
== BEG
)
1753 /* Beginning of buffer is always a character boundary. */
1756 c
= FETCH_BYTE (byte_pos
);
1757 if (! CHAR_HEAD_P (c
))
1759 /* We should advance BYTE_POS only when C is a constituen of a
1760 multibyte sequence. */
1763 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1764 surely advance to the correct character boundary. If C is
1765 not, BYTE_POS was unchanged. */
1771 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1773 "Set the multibyte flag of the current buffer to FLAG.\n\
1774 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1775 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1776 The buffer contents remain unchanged as a sequence of bytes\n\
1777 but the contents viewed as characters do change.")
1781 Lisp_Object tail
, markers
;
1782 struct buffer
*other
;
1784 if (current_buffer
->base_buffer
)
1785 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1787 /* Do nothing if nothing actually changes. */
1788 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1791 /* It would be better to update the list,
1792 but this is good enough for now. */
1793 if (! EQ (current_buffer
->undo_list
, Qt
))
1794 current_buffer
->undo_list
= Qnil
;
1796 /* If the cached position is for this buffer, clear it out. */
1797 clear_charpos_cache (current_buffer
);
1801 /* Do this first, so it can use CHAR_TO_BYTE
1802 to calculate the old correspondences. */
1803 set_intervals_multibyte (0);
1805 current_buffer
->enable_multibyte_characters
= Qnil
;
1811 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1813 tail
= BUF_MARKERS (current_buffer
);
1814 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1816 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1817 tail
= XMARKER (tail
)->chain
;
1822 /* Be sure not to have a multibyte sequence striding over the GAP.
1823 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1824 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1826 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1827 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1829 unsigned char *p
= GPT_ADDR
- 1;
1831 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1832 if (BASE_LEADING_CODE_P (*p
))
1834 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1836 move_gap_both (new_gpt
, new_gpt
);
1840 /* Do this first, so that chars_in_text asks the right question.
1841 set_intervals_multibyte needs it too. */
1842 current_buffer
->enable_multibyte_characters
= Qt
;
1844 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1845 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1847 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1849 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1850 if (BEGV_BYTE
> GPT_BYTE
)
1851 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1853 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1855 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1856 if (ZV_BYTE
> GPT_BYTE
)
1857 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1859 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1862 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1865 if (pt_byte
> GPT_BYTE
)
1866 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1868 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1869 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1872 tail
= markers
= BUF_MARKERS (current_buffer
);
1874 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
1875 getting confused by the markers that have not yet been updated.
1876 It is also a signal that it should never create a marker. */
1877 BUF_MARKERS (current_buffer
) = Qnil
;
1879 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1881 XMARKER (tail
)->bytepos
1882 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1883 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1885 tail
= XMARKER (tail
)->chain
;
1888 /* Make sure no markers were put on the chain
1889 while the chain value was incorrect. */
1890 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
1893 BUF_MARKERS (current_buffer
) = markers
;
1895 /* Do this last, so it can calculate the new correspondences
1896 between chars and bytes. */
1897 set_intervals_multibyte (1);
1900 /* Copy this buffer's new multibyte status
1901 into all of its indirect buffers. */
1902 for (other
= all_buffers
; other
; other
= other
->next
)
1903 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
1904 other
->enable_multibyte_characters
1905 = current_buffer
->enable_multibyte_characters
;
1910 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1912 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1913 Most local variable bindings are eliminated so that the default values\n\
1914 become effective once more. Also, the syntax table is set from\n\
1915 `standard-syntax-table', the local keymap is set to nil,\n\
1916 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1917 This function also forces redisplay of the mode line.\n\
1919 Every function to select a new major mode starts by\n\
1920 calling this function.\n\n\
1921 As a special exception, local variables whose names have\n\
1922 a non-nil `permanent-local' property are not eliminated by this function.\n\
1924 The first thing this function does is run\n\
1925 the normal hook `change-major-mode-hook'.")
1928 register Lisp_Object alist
, sym
, tem
;
1931 if (!NILP (Vrun_hooks
))
1932 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1933 oalist
= current_buffer
->local_var_alist
;
1935 /* Make sure none of the bindings in oalist
1936 remain swapped in, in their symbols. */
1938 swap_out_buffer_local_variables (current_buffer
);
1940 /* Actually eliminate all local bindings of this buffer. */
1942 reset_buffer_local_variables (current_buffer
, 0);
1944 /* Redisplay mode lines; we are changing major mode. */
1946 update_mode_lines
++;
1948 /* Any which are supposed to be permanent,
1949 make local again, with the same values they had. */
1951 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1953 sym
= XCONS (XCONS (alist
)->car
)->car
;
1954 tem
= Fget (sym
, Qpermanent_local
);
1957 Fmake_local_variable (sym
);
1958 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1962 /* Force mode-line redisplay. Useful here because all major mode
1963 commands call this function. */
1964 update_mode_lines
++;
1969 /* Make sure no local variables remain set up with buffer B
1970 for their current values. */
1973 swap_out_buffer_local_variables (b
)
1976 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1978 XSETBUFFER (buffer
, b
);
1979 oalist
= b
->local_var_alist
;
1981 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1983 sym
= XCONS (XCONS (alist
)->car
)->car
;
1985 /* Need not do anything if some other buffer's binding is now encached. */
1986 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
1987 if (XBUFFER (tem
) == current_buffer
)
1989 /* Symbol is set up for this buffer's old local value.
1990 Set it up for the current buffer with the default value. */
1992 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
1993 /* Store the symbol's current value into the alist entry
1994 it is currently set up for. This is so that, if the
1995 local is marked permanent, and we make it local again
1996 later in Fkill_all_local_variables, we don't lose the value. */
1997 XCONS (XCONS (tem
)->car
)->cdr
1998 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
1999 /* Switch to the symbol's default-value alist entry. */
2000 XCONS (tem
)->car
= tem
;
2001 /* Mark it as current for buffer B. */
2002 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
2003 /* Store the current value into any forwarding in the symbol. */
2004 store_symval_forwarding (sym
,
2005 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
2011 /* Find all the overlays in the current buffer that contain position POS.
2012 Return the number found, and store them in a vector in *VEC_PTR.
2013 Store in *LEN_PTR the size allocated for the vector.
2014 Store in *NEXT_PTR the next position after POS where an overlay starts,
2015 or ZV if there are no more overlays.
2016 Store in *PREV_PTR the previous position before POS where an overlay ends,
2017 or where an overlay starts which ends at or after POS;
2018 or BEGV if there are no such overlays.
2019 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2021 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2022 when this function is called.
2024 If EXTEND is non-zero, we make the vector bigger if necessary.
2025 If EXTEND is zero, we never extend the vector,
2026 and we store only as many overlays as will fit.
2027 But we still return the total number of overlays. */
2030 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2033 Lisp_Object
**vec_ptr
;
2038 Lisp_Object tail
, overlay
, start
, end
, result
;
2041 Lisp_Object
*vec
= *vec_ptr
;
2044 int inhibit_storing
= 0;
2046 for (tail
= current_buffer
->overlays_before
;
2048 tail
= XCONS (tail
)->cdr
)
2050 int startpos
, endpos
;
2052 overlay
= XCONS (tail
)->car
;
2054 start
= OVERLAY_START (overlay
);
2055 end
= OVERLAY_END (overlay
);
2056 endpos
= OVERLAY_POSITION (end
);
2063 startpos
= OVERLAY_POSITION (start
);
2064 /* This one ends at or after POS
2065 so its start counts for PREV_PTR if it's before POS. */
2066 if (prev
< startpos
&& startpos
< pos
)
2070 if (startpos
<= pos
)
2074 /* The supplied vector is full.
2075 Either make it bigger, or don't store any more in it. */
2078 /* Make it work with an initial len == 0. */
2083 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2087 inhibit_storing
= 1;
2090 if (!inhibit_storing
)
2092 /* Keep counting overlays even if we can't return them all. */
2095 else if (startpos
< next
)
2099 for (tail
= current_buffer
->overlays_after
;
2101 tail
= XCONS (tail
)->cdr
)
2103 int startpos
, endpos
;
2105 overlay
= XCONS (tail
)->car
;
2107 start
= OVERLAY_START (overlay
);
2108 end
= OVERLAY_END (overlay
);
2109 startpos
= OVERLAY_POSITION (start
);
2112 if (startpos
< next
)
2116 endpos
= OVERLAY_POSITION (end
);
2123 *len_ptr
= len
*= 2;
2126 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2130 inhibit_storing
= 1;
2133 if (!inhibit_storing
)
2137 if (startpos
< pos
&& startpos
> prev
)
2140 else if (endpos
< pos
&& endpos
> prev
)
2142 else if (endpos
== pos
&& startpos
> prev
)
2153 /* Find all the overlays in the current buffer that overlap the range BEG-END
2154 or are empty at BEG.
2156 Return the number found, and store them in a vector in *VEC_PTR.
2157 Store in *LEN_PTR the size allocated for the vector.
2158 Store in *NEXT_PTR the next position after POS where an overlay starts,
2159 or ZV if there are no more overlays.
2160 Store in *PREV_PTR the previous position before POS where an overlay ends,
2161 or BEGV if there are no previous overlays.
2162 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2164 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2165 when this function is called.
2167 If EXTEND is non-zero, we make the vector bigger if necessary.
2168 If EXTEND is zero, we never extend the vector,
2169 and we store only as many overlays as will fit.
2170 But we still return the total number of overlays. */
2173 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2176 Lisp_Object
**vec_ptr
;
2181 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2184 Lisp_Object
*vec
= *vec_ptr
;
2187 int inhibit_storing
= 0;
2189 for (tail
= current_buffer
->overlays_before
;
2191 tail
= XCONS (tail
)->cdr
)
2193 int startpos
, endpos
;
2195 overlay
= XCONS (tail
)->car
;
2197 ostart
= OVERLAY_START (overlay
);
2198 oend
= OVERLAY_END (overlay
);
2199 endpos
= OVERLAY_POSITION (oend
);
2206 startpos
= OVERLAY_POSITION (ostart
);
2207 /* Count an interval if it either overlaps the range
2208 or is empty at the start of the range. */
2209 if ((beg
< endpos
&& startpos
< end
)
2210 || (startpos
== endpos
&& beg
== endpos
))
2214 /* The supplied vector is full.
2215 Either make it bigger, or don't store any more in it. */
2218 *len_ptr
= len
*= 2;
2219 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2223 inhibit_storing
= 1;
2226 if (!inhibit_storing
)
2228 /* Keep counting overlays even if we can't return them all. */
2231 else if (startpos
< next
)
2235 for (tail
= current_buffer
->overlays_after
;
2237 tail
= XCONS (tail
)->cdr
)
2239 int startpos
, endpos
;
2241 overlay
= XCONS (tail
)->car
;
2243 ostart
= OVERLAY_START (overlay
);
2244 oend
= OVERLAY_END (overlay
);
2245 startpos
= OVERLAY_POSITION (ostart
);
2248 if (startpos
< next
)
2252 endpos
= OVERLAY_POSITION (oend
);
2253 /* Count an interval if it either overlaps the range
2254 or is empty at the start of the range. */
2255 if ((beg
< endpos
&& startpos
< end
)
2256 || (startpos
== endpos
&& beg
== endpos
))
2262 *len_ptr
= len
*= 2;
2263 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2267 inhibit_storing
= 1;
2270 if (!inhibit_storing
)
2274 else if (endpos
< beg
&& endpos
> prev
)
2285 /* Fast function to just test if we're at an overlay boundary. */
2287 overlay_touches_p (pos
)
2290 Lisp_Object tail
, overlay
;
2292 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2293 tail
= XCONS (tail
)->cdr
)
2297 overlay
= XCONS (tail
)->car
;
2298 if (!GC_OVERLAYP (overlay
))
2301 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2304 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2308 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2309 tail
= XCONS (tail
)->cdr
)
2313 overlay
= XCONS (tail
)->car
;
2314 if (!GC_OVERLAYP (overlay
))
2317 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2320 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2328 Lisp_Object overlay
;
2334 compare_overlays (v1
, v2
)
2335 const void *v1
, *v2
;
2337 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2338 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2339 if (s1
->priority
!= s2
->priority
)
2340 return s1
->priority
- s2
->priority
;
2341 if (s1
->beg
!= s2
->beg
)
2342 return s1
->beg
- s2
->beg
;
2343 if (s1
->end
!= s2
->end
)
2344 return s2
->end
- s1
->end
;
2348 /* Sort an array of overlays by priority. The array is modified in place.
2349 The return value is the new size; this may be smaller than the original
2350 size if some of the overlays were invalid or were window-specific. */
2352 sort_overlays (overlay_vec
, noverlays
, w
)
2353 Lisp_Object
*overlay_vec
;
2358 struct sortvec
*sortvec
;
2359 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2361 /* Put the valid and relevant overlays into sortvec. */
2363 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2366 Lisp_Object overlay
;
2368 overlay
= overlay_vec
[i
];
2369 if (OVERLAY_VALID (overlay
)
2370 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2371 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2373 /* If we're interested in a specific window, then ignore
2374 overlays that are limited to some other window. */
2379 window
= Foverlay_get (overlay
, Qwindow
);
2380 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2384 /* This overlay is good and counts: put it into sortvec. */
2385 sortvec
[j
].overlay
= overlay
;
2386 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2387 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2388 tem
= Foverlay_get (overlay
, Qpriority
);
2390 sortvec
[j
].priority
= XINT (tem
);
2392 sortvec
[j
].priority
= 0;
2398 /* Sort the overlays into the proper order: increasing priority. */
2401 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2403 for (i
= 0; i
< noverlays
; i
++)
2404 overlay_vec
[i
] = sortvec
[i
].overlay
;
2410 Lisp_Object string
, string2
;
2417 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2418 int size
; /* Allocated length of that array. */
2419 int used
; /* How much of the array is currently in use. */
2420 int bytes
; /* Total length of the strings in buf. */
2423 /* Buffers for storing information about the overlays touching a given
2424 position. These could be automatic variables in overlay_strings, but
2425 it's more efficient to hold onto the memory instead of repeatedly
2426 allocating and freeing it. */
2427 static struct sortstrlist overlay_heads
, overlay_tails
;
2428 static unsigned char *overlay_str_buf
;
2430 /* Allocated length of overlay_str_buf. */
2431 static int overlay_str_len
;
2433 /* A comparison function suitable for passing to qsort. */
2435 cmp_for_strings (as1
, as2
)
2438 struct sortstr
*s1
= (struct sortstr
*)as1
;
2439 struct sortstr
*s2
= (struct sortstr
*)as2
;
2440 if (s1
->size
!= s2
->size
)
2441 return s2
->size
- s1
->size
;
2442 if (s1
->priority
!= s2
->priority
)
2443 return s1
->priority
- s2
->priority
;
2448 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2449 struct sortstrlist
*ssl
;
2450 Lisp_Object str
, str2
, pri
;
2455 if (ssl
->used
== ssl
->size
)
2461 ssl
->buf
= ((struct sortstr
*)
2462 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2464 ssl
->buf
[ssl
->used
].string
= str
;
2465 ssl
->buf
[ssl
->used
].string2
= str2
;
2466 ssl
->buf
[ssl
->used
].size
= size
;
2467 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2470 if (NILP (current_buffer
->enable_multibyte_characters
))
2471 nbytes
= XSTRING (str
)->size
;
2472 else if (! STRING_MULTIBYTE (str
))
2473 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2474 STRING_BYTES (XSTRING (str
)));
2476 nbytes
= STRING_BYTES (XSTRING (str
));
2478 ssl
->bytes
+= nbytes
;
2482 if (NILP (current_buffer
->enable_multibyte_characters
))
2483 nbytes
= XSTRING (str2
)->size
;
2484 else if (! STRING_MULTIBYTE (str2
))
2485 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2486 STRING_BYTES (XSTRING (str2
)));
2488 nbytes
= STRING_BYTES (XSTRING (str2
));
2490 ssl
->bytes
+= nbytes
;
2494 /* Return the concatenation of the strings associated with overlays that
2495 begin or end at POS, ignoring overlays that are specific to a window
2496 other than W. The strings are concatenated in the appropriate order:
2497 shorter overlays nest inside longer ones, and higher priority inside
2498 lower. Normally all of the after-strings come first, but zero-sized
2499 overlays have their after-strings ride along with the before-strings
2500 because it would look strange to print them inside-out.
2502 Returns the string length, and stores the contents indirectly through
2503 PSTR, if that variable is non-null. The string may be overwritten by
2504 subsequent calls. */
2507 overlay_strings (pos
, w
, pstr
)
2510 unsigned char **pstr
;
2512 Lisp_Object ov
, overlay
, window
, str
;
2513 int startpos
, endpos
;
2514 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2516 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2517 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2518 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2520 overlay
= XCONS (ov
)->car
;
2521 if (!OVERLAYP (overlay
))
2524 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2525 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2528 if (endpos
!= pos
&& startpos
!= pos
)
2530 window
= Foverlay_get (overlay
, Qwindow
);
2531 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2534 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2535 record_overlay_string (&overlay_heads
, str
,
2537 ? Foverlay_get (overlay
, Qafter_string
)
2539 Foverlay_get (overlay
, Qpriority
),
2541 else if (endpos
== pos
2542 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2543 record_overlay_string (&overlay_tails
, str
, Qnil
,
2544 Foverlay_get (overlay
, Qpriority
),
2547 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2549 overlay
= XCONS (ov
)->car
;
2550 if (!OVERLAYP (overlay
))
2553 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2554 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2557 if (endpos
!= pos
&& startpos
!= pos
)
2559 window
= Foverlay_get (overlay
, Qwindow
);
2560 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2563 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2564 record_overlay_string (&overlay_heads
, str
,
2566 ? Foverlay_get (overlay
, Qafter_string
)
2568 Foverlay_get (overlay
, Qpriority
),
2570 else if (endpos
== pos
2571 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2572 record_overlay_string (&overlay_tails
, str
, Qnil
,
2573 Foverlay_get (overlay
, Qpriority
),
2576 if (overlay_tails
.used
> 1)
2577 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2579 if (overlay_heads
.used
> 1)
2580 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2582 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2587 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2589 if (total
> overlay_str_len
)
2591 overlay_str_len
= total
;
2592 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2595 p
= overlay_str_buf
;
2596 for (i
= overlay_tails
.used
; --i
>= 0;)
2599 tem
= overlay_tails
.buf
[i
].string
;
2600 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2601 STRING_BYTES (XSTRING (tem
)),
2602 STRING_MULTIBYTE (tem
), multibyte
);
2605 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2608 tem
= overlay_heads
.buf
[i
].string
;
2609 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2610 STRING_BYTES (XSTRING (tem
)),
2611 STRING_MULTIBYTE (tem
), multibyte
);
2613 tem
= overlay_heads
.buf
[i
].string2
;
2616 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2617 STRING_BYTES (XSTRING (tem
)),
2618 STRING_MULTIBYTE (tem
), multibyte
);
2622 if (p
!= overlay_str_buf
+ total
)
2625 *pstr
= overlay_str_buf
;
2631 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2634 recenter_overlay_lists (buf
, pos
)
2638 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2640 /* See if anything in overlays_before should move to overlays_after. */
2642 /* We don't strictly need prev in this loop; it should always be nil.
2643 But we use it for symmetry and in case that should cease to be true
2644 with some future change. */
2646 for (tail
= buf
->overlays_before
;
2648 prev
= tail
, tail
= next
)
2650 next
= XCONS (tail
)->cdr
;
2651 overlay
= XCONS (tail
)->car
;
2653 /* If the overlay is not valid, get rid of it. */
2654 if (!OVERLAY_VALID (overlay
))
2659 /* Splice the cons cell TAIL out of overlays_before. */
2661 XCONS (prev
)->cdr
= next
;
2663 buf
->overlays_before
= next
;
2669 beg
= OVERLAY_START (overlay
);
2670 end
= OVERLAY_END (overlay
);
2672 if (OVERLAY_POSITION (end
) > pos
)
2674 /* OVERLAY needs to be moved. */
2675 int where
= OVERLAY_POSITION (beg
);
2676 Lisp_Object other
, other_prev
;
2678 /* Splice the cons cell TAIL out of overlays_before. */
2680 XCONS (prev
)->cdr
= next
;
2682 buf
->overlays_before
= next
;
2684 /* Search thru overlays_after for where to put it. */
2686 for (other
= buf
->overlays_after
;
2688 other_prev
= other
, other
= XCONS (other
)->cdr
)
2690 Lisp_Object otherbeg
, otheroverlay
, follower
;
2693 otheroverlay
= XCONS (other
)->car
;
2694 if (! OVERLAY_VALID (otheroverlay
))
2697 otherbeg
= OVERLAY_START (otheroverlay
);
2698 if (OVERLAY_POSITION (otherbeg
) >= where
)
2702 /* Add TAIL to overlays_after before OTHER. */
2703 XCONS (tail
)->cdr
= other
;
2704 if (!NILP (other_prev
))
2705 XCONS (other_prev
)->cdr
= tail
;
2707 buf
->overlays_after
= tail
;
2711 /* We've reached the things that should stay in overlays_before.
2712 All the rest of overlays_before must end even earlier,
2717 /* See if anything in overlays_after should be in overlays_before. */
2719 for (tail
= buf
->overlays_after
;
2721 prev
= tail
, tail
= next
)
2723 next
= XCONS (tail
)->cdr
;
2724 overlay
= XCONS (tail
)->car
;
2726 /* If the overlay is not valid, get rid of it. */
2727 if (!OVERLAY_VALID (overlay
))
2732 /* Splice the cons cell TAIL out of overlays_after. */
2734 XCONS (prev
)->cdr
= next
;
2736 buf
->overlays_after
= next
;
2742 beg
= OVERLAY_START (overlay
);
2743 end
= OVERLAY_END (overlay
);
2745 /* Stop looking, when we know that nothing further
2746 can possibly end before POS. */
2747 if (OVERLAY_POSITION (beg
) > pos
)
2750 if (OVERLAY_POSITION (end
) <= pos
)
2752 /* OVERLAY needs to be moved. */
2753 int where
= OVERLAY_POSITION (end
);
2754 Lisp_Object other
, other_prev
;
2756 /* Splice the cons cell TAIL out of overlays_after. */
2758 XCONS (prev
)->cdr
= next
;
2760 buf
->overlays_after
= next
;
2762 /* Search thru overlays_before for where to put it. */
2764 for (other
= buf
->overlays_before
;
2766 other_prev
= other
, other
= XCONS (other
)->cdr
)
2768 Lisp_Object otherend
, otheroverlay
;
2771 otheroverlay
= XCONS (other
)->car
;
2772 if (! OVERLAY_VALID (otheroverlay
))
2775 otherend
= OVERLAY_END (otheroverlay
);
2776 if (OVERLAY_POSITION (otherend
) <= where
)
2780 /* Add TAIL to overlays_before before OTHER. */
2781 XCONS (tail
)->cdr
= other
;
2782 if (!NILP (other_prev
))
2783 XCONS (other_prev
)->cdr
= tail
;
2785 buf
->overlays_before
= tail
;
2790 XSETFASTINT (buf
->overlay_center
, pos
);
2794 adjust_overlays_for_insert (pos
, length
)
2798 /* After an insertion, the lists are still sorted properly,
2799 but we may need to update the value of the overlay center. */
2800 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2801 XSETFASTINT (current_buffer
->overlay_center
,
2802 XFASTINT (current_buffer
->overlay_center
) + length
);
2806 adjust_overlays_for_delete (pos
, length
)
2810 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2811 /* The deletion was to our right. No change needed; the before- and
2812 after-lists are still consistent. */
2814 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2815 /* The deletion was to our left. We need to adjust the center value
2816 to account for the change in position, but the lists are consistent
2817 given the new value. */
2818 XSETFASTINT (current_buffer
->overlay_center
,
2819 XFASTINT (current_buffer
->overlay_center
) - length
);
2821 /* We're right in the middle. There might be things on the after-list
2822 that now belong on the before-list. Recentering will move them,
2823 and also update the center point. */
2824 recenter_overlay_lists (current_buffer
, pos
);
2827 /* Fix up overlays that were garbled as a result of permuting markers
2828 in the range START through END. Any overlay with at least one
2829 endpoint in this range will need to be unlinked from the overlay
2830 list and reinserted in its proper place.
2831 Such an overlay might even have negative size at this point.
2832 If so, we'll reverse the endpoints. Can you think of anything
2833 better to do in this situation? */
2835 fix_overlays_in_range (start
, end
)
2836 register int start
, end
;
2838 Lisp_Object tem
, overlay
;
2839 Lisp_Object before_list
, after_list
;
2840 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2841 int startpos
, endpos
;
2843 /* This algorithm shifts links around instead of consing and GCing.
2844 The loop invariant is that before_list (resp. after_list) is a
2845 well-formed list except that its last element, the one that
2846 *pbefore (resp. *pafter) points to, is still uninitialized.
2847 So it's not a bug that before_list isn't initialized, although
2848 it may look strange. */
2849 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2851 overlay
= XCONS (*ptail
)->car
;
2852 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2855 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2857 || (startpos
>= start
&& startpos
< end
))
2859 /* If the overlay is backwards, fix that now. */
2860 if (startpos
> endpos
)
2863 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2865 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2867 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2869 /* Add it to the end of the wrong list. Later on,
2870 recenter_overlay_lists will move it to the right place. */
2871 if (endpos
< XINT (current_buffer
->overlay_center
))
2874 pafter
= &XCONS (*ptail
)->cdr
;
2879 pbefore
= &XCONS (*ptail
)->cdr
;
2881 *ptail
= XCONS (*ptail
)->cdr
;
2884 ptail
= &XCONS (*ptail
)->cdr
;
2886 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2888 overlay
= XCONS (*ptail
)->car
;
2889 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2890 if (startpos
>= end
)
2892 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2893 if (startpos
>= start
2894 || (endpos
>= start
&& endpos
< end
))
2896 if (startpos
> endpos
)
2899 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2901 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2903 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2905 if (endpos
< XINT (current_buffer
->overlay_center
))
2908 pafter
= &XCONS (*ptail
)->cdr
;
2913 pbefore
= &XCONS (*ptail
)->cdr
;
2915 *ptail
= XCONS (*ptail
)->cdr
;
2918 ptail
= &XCONS (*ptail
)->cdr
;
2921 /* Splice the constructed (wrong) lists into the buffer's lists,
2922 and let the recenter function make it sane again. */
2923 *pbefore
= current_buffer
->overlays_before
;
2924 current_buffer
->overlays_before
= before_list
;
2925 recenter_overlay_lists (current_buffer
,
2926 XINT (current_buffer
->overlay_center
));
2928 *pafter
= current_buffer
->overlays_after
;
2929 current_buffer
->overlays_after
= after_list
;
2930 recenter_overlay_lists (current_buffer
,
2931 XINT (current_buffer
->overlay_center
));
2934 /* We have two types of overlay: the one whose ending marker is
2935 after-insertion-marker (this is the usual case) and the one whose
2936 ending marker is before-insertion-marker. When `overlays_before'
2937 contains overlays of the latter type and the former type in this
2938 order and both overlays end at inserting position, inserting a text
2939 increases only the ending marker of the latter type, which results
2940 in incorrect ordering of `overlays_before'.
2942 This function fixes ordering of overlays in the slot
2943 `overlays_before' of the buffer *BP. Before the insertion, `point'
2944 was at PREV, and now is at POS. */
2947 fix_overlays_before (bp
, prev
, pos
)
2951 Lisp_Object
*tailp
= &bp
->overlays_before
;
2952 Lisp_Object
*right_place
;
2955 /* After the insertion, the several overlays may be in incorrect
2956 order. The possibility is that, in the list `overlays_before',
2957 an overlay which ends at POS appears after an overlay which ends
2958 at PREV. Since POS is greater than PREV, we must fix the
2959 ordering of these overlays, by moving overlays ends at POS before
2960 the overlays ends at PREV. */
2962 /* At first, find a place where disordered overlays should be linked
2963 in. It is where an overlay which end before POS exists. (i.e. an
2964 overlay whose ending marker is after-insertion-marker if disorder
2966 while (!NILP (*tailp
)
2967 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2969 tailp
= &XCONS (*tailp
)->cdr
;
2971 /* If we don't find such an overlay,
2972 or the found one ends before PREV,
2973 or the found one is the last one in the list,
2974 we don't have to fix anything. */
2977 || NILP (XCONS (*tailp
)->cdr
))
2980 right_place
= tailp
;
2981 tailp
= &XCONS (*tailp
)->cdr
;
2983 /* Now, end position of overlays in the list *TAILP should be before
2984 or equal to PREV. In the loop, an overlay which ends at POS is
2985 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2986 overlay which ends before PREV, the remaining overlays are in
2988 while (!NILP (*tailp
))
2990 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2993 { /* This overlay is disordered. */
2994 Lisp_Object found
= *tailp
;
2996 /* Unlink the found overlay. */
2997 *tailp
= XCONS (found
)->cdr
;
2998 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2999 XCONS (found
)->cdr
= *right_place
;
3000 /* Link it into the right place. */
3001 *right_place
= found
;
3003 else if (end
== prev
)
3004 tailp
= &XCONS (*tailp
)->cdr
;
3005 else /* No more disordered overlay. */
3010 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3011 "Return t if OBJECT is an overlay.")
3015 return (OVERLAYP (object
) ? Qt
: Qnil
);
3018 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3019 "Create a new overlay with range BEG to END in BUFFER.\n\
3020 If omitted, BUFFER defaults to the current buffer.\n\
3021 BEG and END may be integers or markers.\n\
3022 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
3023 front delimiter advance when text is inserted there.\n\
3024 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
3025 rear delimiter advance when text is inserted there.")
3026 (beg
, end
, buffer
, front_advance
, rear_advance
)
3027 Lisp_Object beg
, end
, buffer
;
3028 Lisp_Object front_advance
, rear_advance
;
3030 Lisp_Object overlay
;
3034 XSETBUFFER (buffer
, current_buffer
);
3036 CHECK_BUFFER (buffer
, 2);
3038 && ! EQ (Fmarker_buffer (beg
), buffer
))
3039 error ("Marker points into wrong buffer");
3041 && ! EQ (Fmarker_buffer (end
), buffer
))
3042 error ("Marker points into wrong buffer");
3044 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3045 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3047 if (XINT (beg
) > XINT (end
))
3050 temp
= beg
; beg
= end
; end
= temp
;
3053 b
= XBUFFER (buffer
);
3055 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3056 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3058 if (!NILP (front_advance
))
3059 XMARKER (beg
)->insertion_type
= 1;
3060 if (!NILP (rear_advance
))
3061 XMARKER (end
)->insertion_type
= 1;
3063 overlay
= allocate_misc ();
3064 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3065 XOVERLAY (overlay
)->start
= beg
;
3066 XOVERLAY (overlay
)->end
= end
;
3067 XOVERLAY (overlay
)->plist
= Qnil
;
3069 /* Put the new overlay on the wrong list. */
3070 end
= OVERLAY_END (overlay
);
3071 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3072 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3074 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3076 /* This puts it in the right list, and in the right order. */
3077 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3079 /* We don't need to redisplay the region covered by the overlay, because
3080 the overlay has no properties at the moment. */
3085 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3088 modify_overlay (buf
, start
, end
)
3098 start
= end
; end
= temp
;
3101 /* If this is a buffer not in the selected window,
3102 we must do other windows. */
3103 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3104 windows_or_buffers_changed
= 1;
3105 /* If multiple windows show this buffer, we must do other windows. */
3106 else if (buffer_shared
> 1)
3107 windows_or_buffers_changed
= 1;
3109 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3111 ++BUF_OVERLAY_MODIFF (buf
);
3115 Lisp_Object
Fdelete_overlay ();
3117 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3118 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3119 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3120 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3122 (overlay
, beg
, end
, buffer
)
3123 Lisp_Object overlay
, beg
, end
, buffer
;
3125 struct buffer
*b
, *ob
;
3126 Lisp_Object obuffer
;
3127 int count
= specpdl_ptr
- specpdl
;
3129 CHECK_OVERLAY (overlay
, 0);
3131 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3133 XSETBUFFER (buffer
, current_buffer
);
3134 CHECK_BUFFER (buffer
, 3);
3137 && ! EQ (Fmarker_buffer (beg
), buffer
))
3138 error ("Marker points into wrong buffer");
3140 && ! EQ (Fmarker_buffer (end
), buffer
))
3141 error ("Marker points into wrong buffer");
3143 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3144 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3146 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3147 return Fdelete_overlay (overlay
);
3149 if (XINT (beg
) > XINT (end
))
3152 temp
= beg
; beg
= end
; end
= temp
;
3155 specbind (Qinhibit_quit
, Qt
);
3157 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3158 b
= XBUFFER (buffer
);
3159 ob
= XBUFFER (obuffer
);
3161 /* If the overlay has changed buffers, do a thorough redisplay. */
3162 if (!EQ (buffer
, obuffer
))
3164 /* Redisplay where the overlay was. */
3165 if (!NILP (obuffer
))
3170 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3171 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3173 modify_overlay (ob
, o_beg
, o_end
);
3176 /* Redisplay where the overlay is going to be. */
3177 modify_overlay (b
, XINT (beg
), XINT (end
));
3180 /* Redisplay the area the overlay has just left, or just enclosed. */
3183 int change_beg
, change_end
;
3185 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3186 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3188 if (o_beg
== XINT (beg
))
3189 modify_overlay (b
, o_end
, XINT (end
));
3190 else if (o_end
== XINT (end
))
3191 modify_overlay (b
, o_beg
, XINT (beg
));
3194 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3195 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3196 modify_overlay (b
, o_beg
, o_end
);
3200 if (!NILP (obuffer
))
3202 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3203 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3206 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3207 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3209 /* Put the overlay on the wrong list. */
3210 end
= OVERLAY_END (overlay
);
3211 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3212 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3214 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3216 /* This puts it in the right list, and in the right order. */
3217 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3219 return unbind_to (count
, overlay
);
3222 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3223 "Delete the overlay OVERLAY from its buffer.")
3225 Lisp_Object overlay
;
3229 int count
= specpdl_ptr
- specpdl
;
3231 CHECK_OVERLAY (overlay
, 0);
3233 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3237 b
= XBUFFER (buffer
);
3239 specbind (Qinhibit_quit
, Qt
);
3241 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3242 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3245 marker_position (OVERLAY_START (overlay
)),
3246 marker_position (OVERLAY_END (overlay
)));
3248 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3249 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3251 return unbind_to (count
, Qnil
);
3254 /* Overlay dissection functions. */
3256 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3257 "Return the position at which OVERLAY starts.")
3259 Lisp_Object overlay
;
3261 CHECK_OVERLAY (overlay
, 0);
3263 return (Fmarker_position (OVERLAY_START (overlay
)));
3266 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3267 "Return the position at which OVERLAY ends.")
3269 Lisp_Object overlay
;
3271 CHECK_OVERLAY (overlay
, 0);
3273 return (Fmarker_position (OVERLAY_END (overlay
)));
3276 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3277 "Return the buffer OVERLAY belongs to.")
3279 Lisp_Object overlay
;
3281 CHECK_OVERLAY (overlay
, 0);
3283 return Fmarker_buffer (OVERLAY_START (overlay
));
3286 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3287 "Return a list of the properties on OVERLAY.\n\
3288 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3291 Lisp_Object overlay
;
3293 CHECK_OVERLAY (overlay
, 0);
3295 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3299 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3300 "Return a list of the overlays that contain position POS.")
3305 Lisp_Object
*overlay_vec
;
3309 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3312 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3314 /* Put all the overlays we want in a vector in overlay_vec.
3315 Store the length in len. */
3316 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3317 (int *) 0, (int *) 0);
3319 /* Make a list of them all. */
3320 result
= Flist (noverlays
, overlay_vec
);
3322 xfree (overlay_vec
);
3326 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3327 "Return a list of the overlays that overlap the region BEG ... END.\n\
3328 Overlap means that at least one character is contained within the overlay\n\
3329 and also contained within the specified region.\n\
3330 Empty overlays are included in the result if they are located at BEG\n\
3331 or between BEG and END.")
3333 Lisp_Object beg
, end
;
3336 Lisp_Object
*overlay_vec
;
3340 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3341 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3344 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3346 /* Put all the overlays we want in a vector in overlay_vec.
3347 Store the length in len. */
3348 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3349 (int *) 0, (int *) 0);
3351 /* Make a list of them all. */
3352 result
= Flist (noverlays
, overlay_vec
);
3354 xfree (overlay_vec
);
3358 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3360 "Return the next position after POS where an overlay starts or ends.\n\
3361 If there are no more overlay boundaries after POS, return (point-max).")
3367 Lisp_Object
*overlay_vec
;
3371 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3374 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3376 /* Put all the overlays we want in a vector in overlay_vec.
3377 Store the length in len.
3378 endpos gets the position where the next overlay starts. */
3379 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3380 &endpos
, (int *) 0);
3382 /* If any of these overlays ends before endpos,
3383 use its ending point instead. */
3384 for (i
= 0; i
< noverlays
; i
++)
3389 oend
= OVERLAY_END (overlay_vec
[i
]);
3390 oendpos
= OVERLAY_POSITION (oend
);
3391 if (oendpos
< endpos
)
3395 xfree (overlay_vec
);
3396 return make_number (endpos
);
3399 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3400 Sprevious_overlay_change
, 1, 1, 0,
3401 "Return the previous position before POS where an overlay starts or ends.\n\
3402 If there are no more overlay boundaries before POS, return (point-min).")
3408 Lisp_Object
*overlay_vec
;
3413 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3416 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3418 /* At beginning of buffer, we know the answer;
3419 avoid bug subtracting 1 below. */
3420 if (XINT (pos
) == BEGV
)
3423 /* Put all the overlays we want in a vector in overlay_vec.
3424 Store the length in len.
3425 prevpos gets the position of the previous change. */
3426 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3427 (int *) 0, &prevpos
);
3429 xfree (overlay_vec
);
3430 return make_number (prevpos
);
3433 /* These functions are for debugging overlays. */
3435 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3436 "Return a pair of lists giving all the overlays of the current buffer.\n\
3437 The car has all the overlays before the overlay center;\n\
3438 the cdr has all the overlays after the overlay center.\n\
3439 Recentering overlays moves overlays between these lists.\n\
3440 The lists you get are copies, so that changing them has no effect.\n\
3441 However, the overlays you get are the real objects that the buffer uses.")
3444 Lisp_Object before
, after
;
3445 before
= current_buffer
->overlays_before
;
3447 before
= Fcopy_sequence (before
);
3448 after
= current_buffer
->overlays_after
;
3450 after
= Fcopy_sequence (after
);
3452 return Fcons (before
, after
);
3455 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3456 "Recenter the overlays of the current buffer around position POS.")
3460 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3462 recenter_overlay_lists (current_buffer
, XINT (pos
));
3466 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3467 "Get the property of overlay OVERLAY with property name PROP.")
3469 Lisp_Object overlay
, prop
;
3471 Lisp_Object plist
, fallback
;
3473 CHECK_OVERLAY (overlay
, 0);
3477 for (plist
= XOVERLAY (overlay
)->plist
;
3478 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3479 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3481 if (EQ (XCONS (plist
)->car
, prop
))
3482 return XCONS (XCONS (plist
)->cdr
)->car
;
3483 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3486 tem
= Fcar (Fcdr (plist
));
3488 fallback
= Fget (tem
, prop
);
3495 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3496 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3497 (overlay
, prop
, value
)
3498 Lisp_Object overlay
, prop
, value
;
3500 Lisp_Object tail
, buffer
;
3503 CHECK_OVERLAY (overlay
, 0);
3505 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3507 for (tail
= XOVERLAY (overlay
)->plist
;
3508 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3509 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3510 if (EQ (XCONS (tail
)->car
, prop
))
3512 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3513 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3516 /* It wasn't in the list, so add it to the front. */
3517 changed
= !NILP (value
);
3518 XOVERLAY (overlay
)->plist
3519 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3521 if (! NILP (buffer
))
3524 modify_overlay (XBUFFER (buffer
),
3525 marker_position (OVERLAY_START (overlay
)),
3526 marker_position (OVERLAY_END (overlay
)));
3527 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3528 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3529 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3530 Fdelete_overlay (overlay
);
3535 /* Subroutine of report_overlay_modification. */
3537 /* Lisp vector holding overlay hook functions to call.
3538 Vector elements come in pairs.
3539 Each even-index element is a list of hook functions.
3540 The following odd-index element is the overlay they came from.
3542 Before the buffer change, we fill in this vector
3543 as we call overlay hook functions.
3544 After the buffer change, we get the functions to call from this vector.
3545 This way we always call the same functions before and after the change. */
3546 static Lisp_Object last_overlay_modification_hooks
;
3548 /* Number of elements actually used in last_overlay_modification_hooks. */
3549 static int last_overlay_modification_hooks_used
;
3551 /* Add one functionlist/overlay pair
3552 to the end of last_overlay_modification_hooks. */
3555 add_overlay_mod_hooklist (functionlist
, overlay
)
3556 Lisp_Object functionlist
, overlay
;
3558 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3560 if (last_overlay_modification_hooks_used
== oldsize
)
3563 old
= last_overlay_modification_hooks
;
3564 last_overlay_modification_hooks
3565 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3566 bcopy (XVECTOR (old
)->contents
,
3567 XVECTOR (last_overlay_modification_hooks
)->contents
,
3568 sizeof (Lisp_Object
) * oldsize
);
3570 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3571 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3574 /* Run the modification-hooks of overlays that include
3575 any part of the text in START to END.
3576 If this change is an insertion, also
3577 run the insert-before-hooks of overlay starting at END,
3578 and the insert-after-hooks of overlay ending at START.
3580 This is called both before and after the modification.
3581 AFTER is nonzero when we call after the modification.
3583 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3584 When AFTER is nonzero, they are the start position,
3585 the position after the inserted new text,
3586 and the length of deleted or replaced old text. */
3589 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3590 Lisp_Object start
, end
;
3592 Lisp_Object arg1
, arg2
, arg3
;
3594 Lisp_Object prop
, overlay
, tail
;
3595 /* 1 if this change is an insertion. */
3596 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3598 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3602 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3606 /* Call the functions recorded in last_overlay_modification_hooks
3607 rather than scanning the overlays again.
3608 First copy the vector contents, in case some of these hooks
3609 do subsequent modification of the buffer. */
3610 int size
= last_overlay_modification_hooks_used
;
3611 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3614 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3615 copy
, size
* sizeof (Lisp_Object
));
3617 gcpro1
.nvars
= size
;
3619 for (i
= 0; i
< size
;)
3621 Lisp_Object prop
, overlay
;
3623 overlay
= copy
[i
++];
3624 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3630 /* We are being called before a change.
3631 Scan the overlays to find the functions to call. */
3632 last_overlay_modification_hooks_used
= 0;
3634 for (tail
= current_buffer
->overlays_before
;
3636 tail
= XCONS (tail
)->cdr
)
3638 int startpos
, endpos
;
3639 Lisp_Object ostart
, oend
;
3641 overlay
= XCONS (tail
)->car
;
3643 ostart
= OVERLAY_START (overlay
);
3644 oend
= OVERLAY_END (overlay
);
3645 endpos
= OVERLAY_POSITION (oend
);
3646 if (XFASTINT (start
) > endpos
)
3648 startpos
= OVERLAY_POSITION (ostart
);
3649 if (insertion
&& (XFASTINT (start
) == startpos
3650 || XFASTINT (end
) == startpos
))
3652 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3655 /* Copy TAIL in case the hook recenters the overlay lists. */
3657 tail
= Fcopy_sequence (tail
);
3659 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3662 if (insertion
&& (XFASTINT (start
) == endpos
3663 || XFASTINT (end
) == endpos
))
3665 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3669 tail
= Fcopy_sequence (tail
);
3671 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3674 /* Test for intersecting intervals. This does the right thing
3675 for both insertion and deletion. */
3676 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3678 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3682 tail
= Fcopy_sequence (tail
);
3684 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3690 for (tail
= current_buffer
->overlays_after
;
3692 tail
= XCONS (tail
)->cdr
)
3694 int startpos
, endpos
;
3695 Lisp_Object ostart
, oend
;
3697 overlay
= XCONS (tail
)->car
;
3699 ostart
= OVERLAY_START (overlay
);
3700 oend
= OVERLAY_END (overlay
);
3701 startpos
= OVERLAY_POSITION (ostart
);
3702 endpos
= OVERLAY_POSITION (oend
);
3703 if (XFASTINT (end
) < startpos
)
3705 if (insertion
&& (XFASTINT (start
) == startpos
3706 || XFASTINT (end
) == startpos
))
3708 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3712 tail
= Fcopy_sequence (tail
);
3714 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3717 if (insertion
&& (XFASTINT (start
) == endpos
3718 || XFASTINT (end
) == endpos
))
3720 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3724 tail
= Fcopy_sequence (tail
);
3726 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3729 /* Test for intersecting intervals. This does the right thing
3730 for both insertion and deletion. */
3731 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3733 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3737 tail
= Fcopy_sequence (tail
);
3739 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3748 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3749 Lisp_Object list
, overlay
;
3751 Lisp_Object arg1
, arg2
, arg3
;
3753 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3755 GCPRO4 (list
, arg1
, arg2
, arg3
);
3757 add_overlay_mod_hooklist (list
, overlay
);
3759 while (!NILP (list
))
3762 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3764 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3770 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3773 evaporate_overlays (pos
)
3776 Lisp_Object tail
, overlay
, hit_list
;
3779 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3780 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3781 tail
= XCONS (tail
)->cdr
)
3784 overlay
= XCONS (tail
)->car
;
3785 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3788 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3789 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3790 hit_list
= Fcons (overlay
, hit_list
);
3793 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3794 tail
= XCONS (tail
)->cdr
)
3797 overlay
= XCONS (tail
)->car
;
3798 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3801 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3802 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3803 hit_list
= Fcons (overlay
, hit_list
);
3805 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3806 Fdelete_overlay (XCONS (hit_list
)->car
);
3809 /* Somebody has tried to store a value with an unacceptable type
3810 in the slot with offset OFFSET. */
3813 buffer_slot_type_mismatch (offset
)
3818 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3819 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3821 case Lisp_Int
: type_name
= "integers"; break;
3822 case Lisp_String
: type_name
= "strings"; break;
3823 case Lisp_Symbol
: type_name
= "symbols"; break;
3829 error ("Only %s should be stored in the buffer-local variable %s",
3830 type_name
, XSYMBOL (sym
)->name
->data
);
3836 register Lisp_Object tem
;
3838 buffer_permanent_local_flags
= 0;
3840 /* Make sure all markable slots in buffer_defaults
3841 are initialized reasonably, so mark_buffer won't choke. */
3842 reset_buffer (&buffer_defaults
);
3843 reset_buffer_local_variables (&buffer_defaults
, 1);
3844 reset_buffer (&buffer_local_symbols
);
3845 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3846 /* Prevent GC from getting confused. */
3847 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3848 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3849 #ifdef USE_TEXT_PROPERTIES
3850 BUF_INTERVALS (&buffer_defaults
) = 0;
3851 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3853 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3854 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3856 /* Set up the default values of various buffer slots. */
3857 /* Must do these before making the first buffer! */
3859 /* real setup is done in loaddefs.el */
3860 buffer_defaults
.mode_line_format
= build_string ("%-");
3861 buffer_defaults
.top_line_format
= Qnil
;
3862 buffer_defaults
.abbrev_mode
= Qnil
;
3863 buffer_defaults
.overwrite_mode
= Qnil
;
3864 buffer_defaults
.case_fold_search
= Qt
;
3865 buffer_defaults
.auto_fill_function
= Qnil
;
3866 buffer_defaults
.selective_display
= Qnil
;
3868 buffer_defaults
.selective_display_ellipses
= Qt
;
3870 buffer_defaults
.abbrev_table
= Qnil
;
3871 buffer_defaults
.display_table
= Qnil
;
3872 buffer_defaults
.undo_list
= Qnil
;
3873 buffer_defaults
.mark_active
= Qnil
;
3874 buffer_defaults
.file_format
= Qnil
;
3875 buffer_defaults
.overlays_before
= Qnil
;
3876 buffer_defaults
.overlays_after
= Qnil
;
3877 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3879 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3880 buffer_defaults
.truncate_lines
= Qnil
;
3881 buffer_defaults
.ctl_arrow
= Qt
;
3882 buffer_defaults
.direction_reversed
= Qnil
;
3885 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3887 buffer_defaults
.enable_multibyte_characters
= Qt
;
3888 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3889 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3890 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3891 buffer_defaults
.cache_long_line_scans
= Qnil
;
3892 buffer_defaults
.file_truename
= Qnil
;
3893 XSETFASTINT (buffer_defaults
.display_count
, 0);
3894 buffer_defaults
.indicate_empty_lines
= Qnil
;
3895 buffer_defaults
.scroll_up_aggressively
= Qnil
;
3896 buffer_defaults
.scroll_down_aggressively
= Qnil
;
3897 buffer_defaults
.display_time
= Qnil
;
3899 /* Assign the local-flags to the slots that have default values.
3900 The local flag is a bit that is used in the buffer
3901 to say that it has its own local value for the slot.
3902 The local flag bits are in the local_var_flags slot of the buffer. */
3904 /* Nothing can work if this isn't true */
3905 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3907 /* 0 means not a lisp var, -1 means always local, else mask */
3908 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3909 XSETINT (buffer_local_flags
.filename
, -1);
3910 XSETINT (buffer_local_flags
.directory
, -1);
3911 XSETINT (buffer_local_flags
.backed_up
, -1);
3912 XSETINT (buffer_local_flags
.save_length
, -1);
3913 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3914 XSETINT (buffer_local_flags
.read_only
, -1);
3915 XSETINT (buffer_local_flags
.major_mode
, -1);
3916 XSETINT (buffer_local_flags
.mode_name
, -1);
3917 XSETINT (buffer_local_flags
.undo_list
, -1);
3918 XSETINT (buffer_local_flags
.mark_active
, -1);
3919 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3920 XSETINT (buffer_local_flags
.file_truename
, -1);
3921 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3922 XSETINT (buffer_local_flags
.file_format
, -1);
3923 XSETINT (buffer_local_flags
.display_count
, -1);
3924 XSETINT (buffer_local_flags
.display_time
, -1);
3925 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3927 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3928 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3929 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3930 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3931 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3932 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3934 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3936 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3937 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3938 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3939 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3940 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3941 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3942 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3944 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3945 /* Make this one a permanent local. */
3946 buffer_permanent_local_flags
|= 0x4000;
3948 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3949 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3950 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3951 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3952 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3953 /* Make this one a permanent local. */
3954 buffer_permanent_local_flags
|= 0x80000;
3955 XSETFASTINT (buffer_local_flags
.left_margin_width
, 0x100000);
3956 XSETFASTINT (buffer_local_flags
.right_margin_width
, 0x200000);
3957 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, 0x400000);
3958 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, 0x800000);
3959 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, 0x1000000);
3960 XSETFASTINT (buffer_local_flags
.top_line_format
, 0x2000000);
3962 Vbuffer_alist
= Qnil
;
3966 QSFundamental
= build_string ("Fundamental");
3968 Qfundamental_mode
= intern ("fundamental-mode");
3969 buffer_defaults
.major_mode
= Qfundamental_mode
;
3971 Qmode_class
= intern ("mode-class");
3973 Qprotected_field
= intern ("protected-field");
3975 Qpermanent_local
= intern ("permanent-local");
3977 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3979 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3981 /* super-magic invisible buffer */
3982 Vbuffer_alist
= Qnil
;
3984 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3986 inhibit_modification_hooks
= 0;
3992 char buf
[MAXPATHLEN
+1];
3994 struct stat dotstat
, pwdstat
;
3998 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3999 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4000 Fset_buffer_multibyte (Qnil
);
4002 /* If PWD is accurate, use it instead of calling getwd. This is faster
4003 when PWD is right, and may avoid a fatal error. */
4004 if ((pwd
= getenv ("PWD")) != 0
4005 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4006 && stat (pwd
, &pwdstat
) == 0
4007 && stat (".", &dotstat
) == 0
4008 && dotstat
.st_ino
== pwdstat
.st_ino
4009 && dotstat
.st_dev
== pwdstat
.st_dev
4010 && strlen (pwd
) < MAXPATHLEN
)
4013 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4014 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4016 else if (getwd (buf
) == 0)
4017 fatal ("`getwd' failed: %s\n", buf
);
4021 /* Maybe this should really use some standard subroutine
4022 whose definition is filename syntax dependent. */
4024 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4026 buf
[rc
] = DIRECTORY_SEP
;
4029 #endif /* not VMS */
4031 current_buffer
->directory
= build_string (buf
);
4033 /* Add /: to the front of the name
4034 if it would otherwise be treated as magic. */
4035 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4037 /* If the default dir is just /, TEMP is non-nil
4038 because of the ange-ftp completion handler.
4039 However, it is not necessary to turn / into /:/.
4040 So avoid doing that. */
4041 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4042 current_buffer
->directory
4043 = concat2 (build_string ("/:"), current_buffer
->directory
);
4045 temp
= get_minibuffer (0);
4046 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4049 /* initialize the buffer routines */
4053 extern Lisp_Object Qdisabled
;
4055 staticpro (&last_overlay_modification_hooks
);
4056 last_overlay_modification_hooks
4057 = Fmake_vector (make_number (10), Qnil
);
4059 staticpro (&Vbuffer_defaults
);
4060 staticpro (&Vbuffer_local_symbols
);
4061 staticpro (&Qfundamental_mode
);
4062 staticpro (&Qmode_class
);
4063 staticpro (&QSFundamental
);
4064 staticpro (&Vbuffer_alist
);
4065 staticpro (&Qprotected_field
);
4066 staticpro (&Qpermanent_local
);
4067 staticpro (&Qkill_buffer_hook
);
4068 Qoverlayp
= intern ("overlayp");
4069 staticpro (&Qoverlayp
);
4070 Qevaporate
= intern ("evaporate");
4071 staticpro (&Qevaporate
);
4072 Qmodification_hooks
= intern ("modification-hooks");
4073 staticpro (&Qmodification_hooks
);
4074 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4075 staticpro (&Qinsert_in_front_hooks
);
4076 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4077 staticpro (&Qinsert_behind_hooks
);
4078 Qget_file_buffer
= intern ("get-file-buffer");
4079 staticpro (&Qget_file_buffer
);
4080 Qpriority
= intern ("priority");
4081 staticpro (&Qpriority
);
4082 Qwindow
= intern ("window");
4083 staticpro (&Qwindow
);
4084 Qbefore_string
= intern ("before-string");
4085 staticpro (&Qbefore_string
);
4086 Qafter_string
= intern ("after-string");
4087 staticpro (&Qafter_string
);
4088 Qfirst_change_hook
= intern ("first-change-hook");
4089 staticpro (&Qfirst_change_hook
);
4090 Qbefore_change_functions
= intern ("before-change-functions");
4091 staticpro (&Qbefore_change_functions
);
4092 Qafter_change_functions
= intern ("after-change-functions");
4093 staticpro (&Qafter_change_functions
);
4095 Fput (Qprotected_field
, Qerror_conditions
,
4096 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4097 Fput (Qprotected_field
, Qerror_message
,
4098 build_string ("Attempt to modify a protected field"));
4100 /* All these use DEFVAR_LISP_NOPRO because the slots in
4101 buffer_defaults will all be marked via Vbuffer_defaults. */
4103 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4104 &buffer_defaults
.mode_line_format
,
4105 "Default value of `mode-line-format' for buffers that don't override it.\n\
4106 This is the same as (default-value 'mode-line-format).");
4108 DEFVAR_LISP_NOPRO ("default-top-line-format",
4109 &buffer_defaults
.top_line_format
,
4110 "Default value of `top-line-format' for buffers that don't override it.\n\
4111 This is the same as (default-value 'top-line-format).");
4113 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4114 &buffer_defaults
.abbrev_mode
,
4115 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4116 This is the same as (default-value 'abbrev-mode).");
4118 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4119 &buffer_defaults
.ctl_arrow
,
4120 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4121 This is the same as (default-value 'ctl-arrow).");
4123 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4124 &buffer_defaults
.direction_reversed
,
4125 "Default value of `direction_reversed' for buffers that do not override it.\n\
4126 This is the same as (default-value 'direction-reversed).");
4128 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4129 &buffer_defaults
.enable_multibyte_characters
,
4130 "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4131 This is the same as (default-value 'enable-multibyte-characters).");
4133 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4134 &buffer_defaults
.buffer_file_coding_system
,
4135 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4136 This is the same as (default-value 'buffer-file-coding-system).");
4138 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4139 &buffer_defaults
.truncate_lines
,
4140 "Default value of `truncate-lines' for buffers that do not override it.\n\
4141 This is the same as (default-value 'truncate-lines).");
4143 DEFVAR_LISP_NOPRO ("default-fill-column",
4144 &buffer_defaults
.fill_column
,
4145 "Default value of `fill-column' for buffers that do not override it.\n\
4146 This is the same as (default-value 'fill-column).");
4148 DEFVAR_LISP_NOPRO ("default-left-margin",
4149 &buffer_defaults
.left_margin
,
4150 "Default value of `left-margin' for buffers that do not override it.\n\
4151 This is the same as (default-value 'left-margin).");
4153 DEFVAR_LISP_NOPRO ("default-tab-width",
4154 &buffer_defaults
.tab_width
,
4155 "Default value of `tab-width' for buffers that do not override it.\n\
4156 This is the same as (default-value 'tab-width).");
4158 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4159 &buffer_defaults
.case_fold_search
,
4160 "Default value of `case-fold-search' for buffers that don't override it.\n\
4161 This is the same as (default-value 'case-fold-search).");
4164 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4165 &buffer_defaults
.buffer_file_type
,
4166 "Default file type for buffers that do not override it.\n\
4167 This is the same as (default-value 'buffer-file-type).\n\
4168 The file type is nil for text, t for binary.");
4171 DEFVAR_LISP_NOPRO ("default-left-margin-width",
4172 &buffer_defaults
.left_margin_width
,
4173 "Default value of `left-margin-width' for buffers that don't override it.\n\
4174 This is the same as (default-value 'left-margin-width).");
4176 DEFVAR_LISP_NOPRO ("default-right-margin-width",
4177 &buffer_defaults
.right_margin_width
,
4178 "Default value of `right_margin_width' for buffers that don't override it.\n\
4179 This is the same as (default-value 'right-margin-width).");
4181 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
4182 &buffer_defaults
.indicate_empty_lines
,
4183 "Default value of `indicate-empty-lines' for buffers that don't override it.\n\
4184 This is the same as (default-value 'indicate-empty-lines).");
4186 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
4187 &buffer_defaults
.scroll_up_aggressively
,
4188 "Default value of `scroll-up-aggressively' for buffers that\n\
4189 don't override it. This is the same as (default-value\n\
4190 'scroll-up-aggressively).");
4192 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
4193 &buffer_defaults
.scroll_down_aggressively
,
4194 "Default value of `scroll-down-aggressively' for buffers that\n\
4195 don't override it. This is the same as (default-value\n\
4196 'scroll-down-aggressively).");
4198 DEFVAR_PER_BUFFER ("top-line-format", ¤t_buffer
->top_line_format
,
4200 "Analogous to `mode-line-format', but for a mode line displayed\n\
4201 at the top of windows.");
4203 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4206 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4207 But make-docfile finds it!
4208 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4210 "Template for displaying mode line for current buffer.\n\
4211 Each buffer has its own value of this variable.\n\
4212 Value may be nil, a string, a symbol or a list or cons cell.\n\
4213 A value of nil means don't display a mode line.\n\
4214 For a symbol, its value is used (but it is ignored if t or nil).\n\
4215 A string appearing directly as the value of a symbol is processed verbatim\n\
4216 in that the %-constructs below are not recognized.\n\
4217 For a list whose car is a symbol, the symbol's value is taken,\n\
4218 and if that is non-nil, the cadr of the list is processed recursively.\n\
4219 Otherwise, the caddr of the list (if there is one) is processed.\n\
4220 For a list whose car is a string or list, each element is processed\n\
4221 recursively and the results are effectively concatenated.\n\
4222 For a list whose car is an integer, the cdr of the list is processed\n\
4223 and padded (if the number is positive) or truncated (if negative)\n\
4224 to the width specified by that number.\n\
4225 A string is printed verbatim in the mode line except for %-constructs:\n\
4226 (%-constructs are allowed when the string is the entire mode-line-format\n\
4227 or when it is found in a cons-cell or a list)\n\
4228 %b -- print buffer name. %f -- print visited file name.\n\
4229 %F -- print frame name.\n\
4230 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4231 % means buffer is read-only and * means it is modified.\n\
4232 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4233 %s -- print process status. %l -- print the current line number.\n\
4234 %c -- print the current column number (this makes editing slower).\n\
4235 To make the column number update correctly in all cases,\n\
4236 `column-number-mode' must be non-nil.\n\
4237 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4238 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4239 or print Bottom or All.\n\
4240 %n -- print Narrow if appropriate.\n\
4241 %t -- print T if file is text, B if binary.\n\
4242 %[ -- print one [ for each recursive editing level. %] similar.\n\
4243 %% -- print %. %- -- print infinitely many dashes.\n\
4244 Decimal digits after the % specify field width to which to pad.");
4247 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4248 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4249 nil here means use current buffer's major mode.");
4251 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4252 make_number (Lisp_Symbol
),
4253 "Symbol for current buffer's major mode.");
4255 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4256 make_number (Lisp_String
),
4257 "Pretty name of current buffer's major mode (a string).");
4259 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4260 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4261 Automatically becomes buffer-local when set in any fashion.");
4263 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4265 "*Non-nil if searches and matches should ignore case.\n\
4266 Automatically becomes buffer-local when set in any fashion.");
4268 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4269 make_number (Lisp_Int
),
4270 "*Column beyond which automatic line-wrapping should happen.\n\
4271 Automatically becomes buffer-local when set in any fashion.");
4273 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4274 make_number (Lisp_Int
),
4275 "*Column for the default indent-line-function to indent to.\n\
4276 Linefeed indents to this column in Fundamental mode.\n\
4277 Automatically becomes buffer-local when set in any fashion.");
4279 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4280 make_number (Lisp_Int
),
4281 "*Distance between tab stops (for display of tab characters), in columns.\n\
4282 Automatically becomes buffer-local when set in any fashion.");
4284 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4285 "*Non-nil means display control chars with uparrow.\n\
4286 A value of nil means use backslash and octal digits.\n\
4287 Automatically becomes buffer-local when set in any fashion.\n\
4288 This variable does not apply to characters whose display is specified\n\
4289 in the current display table (if there is one).");
4291 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4292 ¤t_buffer
->enable_multibyte_characters
,
4294 "Non-nil means the buffer contents are regarded as multi-byte characters.\n\
4295 Otherwise they are regarded as unibyte. This affects the display,\n\
4296 file I/O and the behavior of various editing commands.\n\
4298 This variable is buffer-local but you cannot set it directly;\n\
4299 use the function `set-buffer-multibyte' to change a buffer's representation.\n\
4300 Changing its default value with `setq-default' is supported.\n\
4301 See also variable `default-enable-multibyte-characters' and Info node\n\
4302 `(elisp)Text Representations'.");
4304 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4305 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4306 "Coding system to be used for encoding the buffer contents on saving.\n\
4307 This variable applies to saving the buffer, and also to `write-region'\n\
4308 and other functions that use `write-region'.\n\
4309 It does not apply to sending output to subprocesses, however.\n\
4311 If this is nil, the buffer is saved without any code conversion\n\
4312 unless some coding system is specified in `file-coding-system-alist'\n\
4313 for the buffer file.\n\
4315 The variable `coding-system-for-write', if non-nil, overrides this variable.\n\
4317 This variable is never applied to a way of decoding\n\
4318 a file while reading it.");
4320 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4322 "*Non-nil means lines in the buffer are displayed right to left.");
4324 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4325 "*Non-nil means do not display continuation lines;\n\
4326 give each line of text one screen line.\n\
4327 Automatically becomes buffer-local when set in any fashion.\n\
4329 Note that this is overridden by the variable\n\
4330 `truncate-partial-width-windows' if that variable is non-nil\n\
4331 and this buffer is not full-frame width.");
4334 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4336 "Non-nil if the visited file is a binary file.\n\
4337 This variable is meaningful on MS-DOG and Windows NT.\n\
4338 On those systems, it is automatically local in every buffer.\n\
4339 On other systems, this variable is normally always nil.");
4342 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4343 make_number (Lisp_String
),
4344 "Name of default directory of current buffer. Should end with slash.\n\
4345 Each buffer has its own value of this variable.");
4347 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4349 "Function called (if non-nil) to perform auto-fill.\n\
4350 It is called after self-inserting a space or newline.\n\
4351 Each buffer has its own value of this variable.\n\
4352 NOTE: This variable is not a hook;\n\
4353 its value may not be a list of functions.");
4355 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4356 make_number (Lisp_String
),
4357 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4358 Each buffer has its own value of this variable.");
4360 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4361 make_number (Lisp_String
),
4362 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4363 The truename of a file is calculated by `file-truename'\n\
4364 and then abbreviated with `abbreviate-file-name'.\n\
4365 Each buffer has its own value of this variable.");
4367 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4368 ¤t_buffer
->auto_save_file_name
,
4369 make_number (Lisp_String
),
4370 "Name of file for auto-saving current buffer,\n\
4371 or nil if buffer should not be auto-saved.\n\
4372 Each buffer has its own value of this variable.");
4374 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4375 "Non-nil if this buffer is read-only.\n\
4376 Each buffer has its own value of this variable.");
4378 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4379 "Non-nil if this buffer's file has been backed up.\n\
4380 Backing up is done before the first time the file is saved.\n\
4381 Each buffer has its own value of this variable.");
4383 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4384 make_number (Lisp_Int
),
4385 "Length of current buffer when last read in, saved or auto-saved.\n\
4387 Each buffer has its own value of this variable.");
4389 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4391 "Non-nil enables selective display:\n\
4392 Integer N as value means display only lines\n\
4393 that start with less than n columns of space.\n\
4394 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4395 Then ^M's in the file are written into files as newlines.\n\n\
4396 Automatically becomes buffer-local when set in any fashion.");
4399 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4400 ¤t_buffer
->selective_display_ellipses
,
4402 "t means display ... on previous line when a line is invisible.\n\
4403 Automatically becomes buffer-local when set in any fashion.");
4406 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4407 "Non-nil if self-insertion should replace existing text.\n\
4408 The value should be one of `overwrite-mode-textual',\n\
4409 `overwrite-mode-binary', or nil.\n\
4410 If it is `overwrite-mode-textual', self-insertion still\n\
4411 inserts at the end of a line, and inserts when point is before a tab,\n\
4412 until the tab is filled in.\n\
4413 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4414 Automatically becomes buffer-local when set in any fashion.");
4416 #if 0 /* The doc string is too long for some compilers,
4417 but make-docfile can find it in this comment. */
4418 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4420 "Display table that controls display of the contents of current buffer.\n\
4421 Automatically becomes buffer-local when set in any fashion.\n\
4422 The display table is a char-table created with `make-display-table'.\n\
4423 The ordinary char-table elements control how to display each possible text\n\
4424 character. Each value should be a vector of characters or nil;\n\
4425 nil means display the character in the default fashion.\n\
4426 There are six extra slots to control the display of\n\
4427 the end of a truncated screen line (extra-slot 0, a single character);\n\
4428 the end of a continued line (extra-slot 1, a single character);\n\
4429 the escape character used to display character codes in octal\n\
4430 (extra-slot 2, a single character);\n\
4431 the character used as an arrow for control characters (extra-slot 3,\n\
4432 a single character);\n\
4433 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4434 a vector of characters);\n\
4435 the character used to draw the border between side-by-side windows\n\
4436 (extra-slot 5, a single character).\n\
4437 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4438 If this variable is nil, the value of `standard-display-table' is used.\n\
4439 Each window can have its own, overriding display table.");
4441 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4444 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
4446 "*Width of left marginal area for display of a buffer.\n\
4447 Automatically becomes buffer-local when set in any fashion.\n\
4448 A value of nil means no marginal area.");
4450 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
4452 "*Width of right marginal area for display of a buffer.\n\
4453 Automatically becomes buffer-local when set in any fashion.\n\
4454 A value of nil means no marginal area.");
4456 DEFVAR_PER_BUFFER ("indicate-empty-lines",
4457 ¤t_buffer
->indicate_empty_lines
, Qnil
,
4458 "*Non-nil means visually indicate lines not displaying text.\n\
4459 Automatically becomes buffer-local when set in any fashion.\n");
4461 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
4462 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
4463 "*If a number, scroll display up aggressively.\n\
4464 If scrolling a window because point is above the window start, choose\n\
4465 a new window start so that point ends up that fraction of the window's\n\
4466 height from the bottom of the window.\n\
4467 Automatically becomes buffer-local when set in any fashion.");
4469 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
4470 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
4471 "*If a number, scroll display down aggressively.\n\
4472 If scrolling a window because point is below the window end, choose\n\
4473 a new window start so that point ends up that fraction of the window's\n\
4474 height from the top of the window.\n\
4475 Automatically becomes buffer-local when set in any fashion.");
4477 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4480 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4481 "If non-nil, a function to call before each text change (obsolete).\n\
4482 Two arguments are passed to the function: the positions of\n\
4483 the beginning and end of the range of old text to be changed.\n\
4484 \(For an insertion, the beginning and end are at the same place.)\n\
4485 No information is given about the length of the text after the change.\n\
4487 Buffer changes made while executing the `before-change-function'\n\
4488 don't call any before-change or after-change functions.\n\
4489 That's because these variables are temporarily set to nil.\n\
4490 As a result, a hook function cannot straightforwardly alter the value of\n\
4491 these variables. See the Emacs Lisp manual for a way of\n\
4492 accomplishing an equivalent result by using other variables.\n\n\
4493 This variable is obsolete; use `before-change-functions' instead.");
4494 Vbefore_change_function
= Qnil
;
4496 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4497 "If non-nil, a Function to call after each text change (obsolete).\n\
4498 Three arguments are passed to the function: the positions of\n\
4499 the beginning and end of the range of changed text,\n\
4500 and the length of the pre-change text replaced by that range.\n\
4501 \(For an insertion, the pre-change length is zero;\n\
4502 for a deletion, that length is the number of bytes deleted,\n\
4503 and the post-change beginning and end are at the same place.)\n\
4505 Buffer changes made while executing the `after-change-function'\n\
4506 don't call any before-change or after-change functions.\n\
4507 That's because these variables are temporarily set to nil.\n\
4508 As a result, a hook function cannot straightforwardly alter the value of\n\
4509 these variables. See the Emacs Lisp manual for a way of\n\
4510 accomplishing an equivalent result by using other variables.\n\n\
4511 This variable is obsolete; use `after-change-functions' instead.");
4512 Vafter_change_function
= Qnil
;
4514 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4515 "List of functions to call before each text change.\n\
4516 Two arguments are passed to each function: the positions of\n\
4517 the beginning and end of the range of old text to be changed.\n\
4518 \(For an insertion, the beginning and end are at the same place.)\n\
4519 No information is given about the length of the text after the change.\n\
4521 Buffer changes made while executing the `before-change-functions'\n\
4522 don't call any before-change or after-change functions.\n\
4523 That's because these variables are temporarily set to nil.\n\
4524 As a result, a hook function cannot straightforwardly alter the value of\n\
4525 these variables. See the Emacs Lisp manual for a way of\n\
4526 accomplishing an equivalent result by using other variables.\n\
4528 If an unhandled error happens in running these functions,\n\
4529 the variable's value remains nil. That prevents the error\n\
4530 from happening repeatedly and making Emacs nonfunctional.");
4531 Vbefore_change_functions
= Qnil
;
4533 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4534 "List of function to call after each text change.\n\
4535 Three arguments are passed to each function: the positions of\n\
4536 the beginning and end of the range of changed text,\n\
4537 and the length in bytes of the pre-change text replaced by that range.\n\
4538 \(For an insertion, the pre-change length is zero;\n\
4539 for a deletion, that length is the number of bytes deleted,\n\
4540 and the post-change beginning and end are at the same place.)\n\
4542 Buffer changes made while executing the `after-change-functions'\n\
4543 don't call any before-change or after-change functions.\n\
4544 That's because these variables are temporarily set to nil.\n\
4545 As a result, a hook function cannot straightforwardly alter the value of\n\
4546 these variables. See the Emacs Lisp manual for a way of\n\
4547 accomplishing an equivalent result by using other variables.\n\
4549 If an unhandled error happens in running these functions,\n\
4550 the variable's value remains nil. That prevents the error\n\
4551 from happening repeatedly and making Emacs nonfunctional.");
4552 Vafter_change_functions
= Qnil
;
4554 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4555 "A list of functions to call before changing a buffer which is unmodified.\n\
4556 The functions are run using the `run-hooks' function.");
4557 Vfirst_change_hook
= Qnil
;
4559 #if 0 /* The doc string is too long for some compilers,
4560 but make-docfile can find it in this comment. */
4561 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4562 "List of undo entries in current buffer.\n\
4563 This variable is always local in all buffers.\n\
4564 Recent changes come first; older changes follow newer.\n\
4566 An entry (BEG . END) represents an insertion which begins at\n\
4567 position BEG and ends at position END.\n\
4569 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4570 from (abs POSITION). If POSITION is positive, point was at the front\n\
4571 of the text being deleted; if negative, point was at the end.\n\
4573 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4574 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4575 of the visited file's modification time, as of that time. If the\n\
4576 modification time of the most recent save is different, this entry is\n\
4579 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4580 was modified between BEG and END. PROPERTY is the property name,\n\
4581 and VALUE is the old value.\n\
4583 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4584 was adjusted in position by the offset DISTANCE (an integer).\n\
4586 An entry of the form POSITION indicates that point was at the buffer\n\
4587 location given by the integer. Undoing an entry of this form places\n\
4588 point at POSITION.\n\
4590 nil marks undo boundaries. The undo command treats the changes\n\
4591 between two undo boundaries as a single step to be undone.\n\
4593 If the value of the variable is t, undo information is not recorded.");
4595 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4598 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4599 "Non-nil means the mark and region are currently active in this buffer.\n\
4600 Automatically local in all buffers.");
4602 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4603 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4604 This variable is buffer-local, in all buffers.\n\
4606 Normally, the line-motion functions work by scanning the buffer for\n\
4607 newlines. Columnar operations (like move-to-column and\n\
4608 compute-motion) also work by scanning the buffer, summing character\n\
4609 widths as they go. This works well for ordinary text, but if the\n\
4610 buffer's lines are very long (say, more than 500 characters), these\n\
4611 motion functions will take longer to execute. Emacs may also take\n\
4612 longer to update the display.\n\
4614 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4615 results of their scans, and consult the cache to avoid rescanning\n\
4616 regions of the buffer until the text is modified. The caches are most\n\
4617 beneficial when they prevent the most searching---that is, when the\n\
4618 buffer contains long lines and large regions of characters with the\n\
4619 same, fixed screen width.\n\
4621 When cache-long-line-scans is non-nil, processing short lines will\n\
4622 become slightly slower (because of the overhead of consulting the\n\
4623 cache), and the caches will use memory roughly proportional to the\n\
4624 number of newlines and characters whose screen width varies.\n\
4626 The caches require no explicit maintenance; their accuracy is\n\
4627 maintained internally by the Emacs primitives. Enabling or disabling\n\
4628 the cache should not affect the behavior of any of the motion\n\
4629 functions; it should only affect their performance.");
4631 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4632 "Value of point before the last series of scroll operations, or nil.\n\
4633 This variable is always local in all buffers.");
4635 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4636 "List of formats to use when saving this buffer.\n\
4637 This variable is always local in all buffers.\n\
4638 Formats are defined by `format-alist'. This variable is\n\
4639 set when a file is visited. Automatically local in all buffers.");
4641 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4642 ¤t_buffer
->invisibility_spec
, Qnil
,
4643 "Invisibility spec of this buffer.\n\
4644 This variable is always local in all buffers.\n\
4645 The default is t, which means that text is invisible\n\
4646 if it has a non-nil `invisible' property.\n\
4647 If the value is a list, a text character is invisible if its `invisible'\n\
4648 property is an element in that list.\n\
4649 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4650 then characters with property value PROP are invisible,\n\
4651 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4653 DEFVAR_PER_BUFFER ("buffer-display-count",
4654 ¤t_buffer
->display_count
, Qnil
,
4655 "A number incremented each time this buffer is displayed in a window.\n\
4656 This variable is always local in all buffers.\n\
4657 The function `set-window-buffer increments it.");
4659 DEFVAR_PER_BUFFER ("buffer-display-time",
4660 ¤t_buffer
->display_time
, Qnil
,
4661 "Time stamp updated each time this buffer is displayed in a window.\n\
4662 This variable is always local in all buffers.\n\
4663 The function `set-window-buffer' updates this variable\n\
4664 to the value obtained by calling `current-time'.\n\
4665 If the buffer has never been shown in a window, the value is nil.");
4667 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4668 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4669 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4670 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4671 all windows or just the selected window.");
4672 Vtransient_mark_mode
= Qnil
;
4674 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4675 "*Non-nil means disregard read-only status of buffers or characters.\n\
4676 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4677 text properties. If the value is a list, disregard `buffer-read-only'\n\
4678 and disregard a `read-only' text property if the property value\n\
4679 is a member of the list.");
4680 Vinhibit_read_only
= Qnil
;
4682 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4683 "List of functions called with no args to query before killing a buffer.");
4684 Vkill_buffer_query_functions
= Qnil
;
4686 defsubr (&Sbuffer_live_p
);
4687 defsubr (&Sbuffer_list
);
4688 defsubr (&Sget_buffer
);
4689 defsubr (&Sget_file_buffer
);
4690 defsubr (&Sget_buffer_create
);
4691 defsubr (&Smake_indirect_buffer
);
4692 defsubr (&Sgenerate_new_buffer_name
);
4693 defsubr (&Sbuffer_name
);
4694 /*defsubr (&Sbuffer_number);*/
4695 defsubr (&Sbuffer_file_name
);
4696 defsubr (&Sbuffer_base_buffer
);
4697 defsubr (&Sbuffer_local_variables
);
4698 defsubr (&Sbuffer_modified_p
);
4699 defsubr (&Sset_buffer_modified_p
);
4700 defsubr (&Sbuffer_modified_tick
);
4701 defsubr (&Srename_buffer
);
4702 defsubr (&Sother_buffer
);
4703 defsubr (&Sbuffer_disable_undo
);
4704 defsubr (&Sbuffer_enable_undo
);
4705 defsubr (&Skill_buffer
);
4706 defsubr (&Sset_buffer_major_mode
);
4707 defsubr (&Sswitch_to_buffer
);
4708 defsubr (&Spop_to_buffer
);
4709 defsubr (&Scurrent_buffer
);
4710 defsubr (&Sset_buffer
);
4711 defsubr (&Sbarf_if_buffer_read_only
);
4712 defsubr (&Sbury_buffer
);
4713 defsubr (&Serase_buffer
);
4714 defsubr (&Sset_buffer_multibyte
);
4715 defsubr (&Skill_all_local_variables
);
4717 defsubr (&Soverlayp
);
4718 defsubr (&Smake_overlay
);
4719 defsubr (&Sdelete_overlay
);
4720 defsubr (&Smove_overlay
);
4721 defsubr (&Soverlay_start
);
4722 defsubr (&Soverlay_end
);
4723 defsubr (&Soverlay_buffer
);
4724 defsubr (&Soverlay_properties
);
4725 defsubr (&Soverlays_at
);
4726 defsubr (&Soverlays_in
);
4727 defsubr (&Snext_overlay_change
);
4728 defsubr (&Sprevious_overlay_change
);
4729 defsubr (&Soverlay_recenter
);
4730 defsubr (&Soverlay_lists
);
4731 defsubr (&Soverlay_get
);
4732 defsubr (&Soverlay_put
);
4738 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4739 initial_define_key (control_x_map
, 'k', "kill-buffer");
4741 /* This must not be in syms_of_buffer, because Qdisabled is not
4742 initialized when that function gets called. */
4743 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);