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
->prompt_end_charpos
= 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
->prompt_end_charpos
= 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
= selected_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
;
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 int count
= specpdl_ptr
- specpdl
;
1077 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1078 set_buffer_internal (b
);
1080 /* First run the query functions; if any query is answered no,
1081 don't kill the buffer. */
1082 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1084 tem
= call0 (Fcar (list
));
1086 return unbind_to (count
, Qnil
);
1089 /* Then run the hooks. */
1090 if (!NILP (Vrun_hooks
))
1091 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1092 unbind_to (count
, Qnil
);
1095 /* We have no more questions to ask. Verify that it is valid
1096 to kill the buffer. This must be done after the questions
1097 since anything can happen within do_yes_or_no_p. */
1099 /* Don't kill the minibuffer now current. */
1100 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1106 /* When we kill a base buffer, kill all its indirect buffers.
1107 We do it at this stage so nothing terrible happens if they
1108 ask questions or their hooks get errors. */
1109 if (! b
->base_buffer
)
1111 struct buffer
*other
;
1115 for (other
= all_buffers
; other
; other
= other
->next
)
1116 /* all_buffers contains dead buffers too;
1117 don't re-kill them. */
1118 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1121 XSETBUFFER (buf
, other
);
1128 /* Make this buffer not be current.
1129 In the process, notice if this is the sole visible buffer
1130 and give up if so. */
1131 if (b
== current_buffer
)
1133 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1135 if (b
== current_buffer
)
1139 /* Now there is no question: we can kill the buffer. */
1141 #ifdef CLASH_DETECTION
1142 /* Unlock this buffer's file, if it is locked. */
1144 #endif /* CLASH_DETECTION */
1146 kill_buffer_processes (buf
);
1148 tem
= Vinhibit_quit
;
1150 replace_buffer_in_all_windows (buf
);
1151 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1152 frames_discard_buffer (buf
);
1153 Vinhibit_quit
= tem
;
1155 /* Delete any auto-save file, if we saved it in this session. */
1156 if (STRINGP (b
->auto_save_file_name
)
1157 && b
->auto_save_modified
!= 0
1158 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1161 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1163 internal_delete_file (b
->auto_save_file_name
);
1168 /* Unchain all markers that belong to this indirect buffer.
1169 Don't unchain the markers that belong to the base buffer
1170 or its other indirect buffers. */
1171 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1177 unchain_marker (tem
);
1183 /* Unchain all markers of this buffer and its indirect buffers.
1184 and leave them pointing nowhere. */
1185 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1192 BUF_MARKERS (b
) = Qnil
;
1194 #ifdef USE_TEXT_PROPERTIES
1195 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1198 /* Perhaps we should explicitly free the interval tree here... */
1201 /* Reset the local variables, so that this buffer's local values
1202 won't be protected from GC. They would be protected
1203 if they happened to remain encached in their symbols.
1204 This gets rid of them for certain. */
1205 swap_out_buffer_local_variables (b
);
1206 reset_buffer_local_variables (b
, 1);
1211 if (! b
->base_buffer
)
1212 BUFFER_FREE (BUF_BEG_ADDR (b
));
1214 if (b
->newline_cache
)
1216 free_region_cache (b
->newline_cache
);
1217 b
->newline_cache
= 0;
1219 if (b
->width_run_cache
)
1221 free_region_cache (b
->width_run_cache
);
1222 b
->width_run_cache
= 0;
1224 b
->width_table
= Qnil
;
1225 b
->prompt_end_charpos
= Qnil
;
1227 b
->undo_list
= Qnil
;
1232 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1233 we do this each time BUF is selected visibly, the more recently
1234 selected buffers are always closer to the front of the list. This
1235 means that other_buffer is more likely to choose a relevant buffer. */
1241 register Lisp_Object link
, prev
;
1243 frame
= selected_frame
;
1246 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1248 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1253 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1254 we cannot use Fdelq itself here because it allows quitting. */
1257 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1259 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1261 XCONS (link
)->cdr
= Vbuffer_alist
;
1262 Vbuffer_alist
= link
;
1264 /* Now move this buffer to the front of frame_buffer_list also. */
1267 for (link
= frame_buffer_list (frame
); CONSP (link
);
1268 link
= XCONS (link
)->cdr
)
1270 if (EQ (XCONS (link
)->car
, buf
))
1275 /* Effectively do delq. */
1280 set_frame_buffer_list (frame
,
1281 XCONS (frame_buffer_list (frame
))->cdr
);
1283 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1285 XCONS (link
)->cdr
= frame_buffer_list (frame
);
1286 set_frame_buffer_list (frame
, link
);
1289 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1292 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1293 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1294 Use this function before selecting the buffer, since it may need to inspect\n\
1295 the current buffer's major mode.")
1300 Lisp_Object function
;
1302 function
= buffer_defaults
.major_mode
;
1303 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1304 function
= current_buffer
->major_mode
;
1306 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1309 count
= specpdl_ptr
- specpdl
;
1311 /* To select a nonfundamental mode,
1312 select the buffer temporarily and then call the mode function. */
1314 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1316 Fset_buffer (buffer
);
1319 return unbind_to (count
, Qnil
);
1322 /* If switching buffers in WINDOW would be an error, return
1323 a C string saying what the error would be. */
1326 no_switch_window (window
)
1330 if (EQ (minibuf_window
, window
))
1331 return "Cannot switch buffers in minibuffer window";
1332 tem
= Fwindow_dedicated_p (window
);
1334 return "Cannot switch buffers in a dedicated window";
1338 /* Switch to buffer BUFFER in the selected window.
1339 If NORECORD is non-nil, don't call record_buffer. */
1342 switch_to_buffer_1 (buffer
, norecord
)
1343 Lisp_Object buffer
, norecord
;
1345 register Lisp_Object buf
;
1348 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1351 buf
= Fget_buffer (buffer
);
1354 buf
= Fget_buffer_create (buffer
);
1355 Fset_buffer_major_mode (buf
);
1359 if (NILP (norecord
))
1360 record_buffer (buf
);
1362 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1363 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1370 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1371 "Select buffer BUFFER in the current window.\n\
1372 BUFFER may be a buffer or a buffer name.\n\
1373 Optional second arg NORECORD non-nil means\n\
1374 do not put this buffer at the front of the list of recently selected ones.\n\
1376 WARNING: This is NOT the way to work on another buffer temporarily\n\
1377 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1378 the window-buffer correspondences.")
1380 Lisp_Object buffer
, norecord
;
1384 err
= no_switch_window (selected_window
);
1385 if (err
) error (err
);
1387 return switch_to_buffer_1 (buffer
, norecord
);
1390 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1391 "Select buffer BUFFER in some window, preferably a different one.\n\
1392 If BUFFER is nil, then some other buffer is chosen.\n\
1393 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1394 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1395 window even if BUFFER is already visible in the selected window.\n\
1396 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1397 of `display-buffer' for additional customization information.\n\
1399 Optional third arg NORECORD non-nil means\n\
1400 do not put this buffer at the front of the list of recently selected ones.")
1401 (buffer
, other_window
, norecord
)
1402 Lisp_Object buffer
, other_window
, norecord
;
1404 register Lisp_Object buf
;
1406 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1409 buf
= Fget_buffer (buffer
);
1412 buf
= Fget_buffer_create (buffer
);
1413 Fset_buffer_major_mode (buf
);
1417 if (NILP (norecord
))
1418 record_buffer (buf
);
1419 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1423 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1424 "Return the current buffer as a Lisp object.")
1427 register Lisp_Object buf
;
1428 XSETBUFFER (buf
, current_buffer
);
1432 /* Set the current buffer to B.
1434 We previously set windows_or_buffers_changed here to invalidate
1435 global unchanged information in beg_unchanged and end_unchanged.
1436 This is no longer necessary because we now compute unchanged
1437 information on a buffer-basis. Every action affecting other
1438 windows than the selected one requires a select_window at some
1439 time, and that increments windows_or_buffers_changed. */
1442 set_buffer_internal (b
)
1443 register struct buffer
*b
;
1445 if (current_buffer
!= b
)
1446 set_buffer_internal_1 (b
);
1449 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1450 This is used by redisplay. */
1453 set_buffer_internal_1 (b
)
1454 register struct buffer
*b
;
1456 register struct buffer
*old_buf
;
1457 register Lisp_Object tail
, valcontents
;
1460 if (current_buffer
== b
)
1463 old_buf
= current_buffer
;
1465 last_known_column_point
= -1; /* invalidate indentation cache */
1469 /* Put the undo list back in the base buffer, so that it appears
1470 that an indirect buffer shares the undo list of its base. */
1471 if (old_buf
->base_buffer
)
1472 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1474 /* If the old current buffer has markers to record PT, BEGV and ZV
1475 when it is not current, update them now. */
1476 if (! NILP (old_buf
->pt_marker
))
1479 XSETBUFFER (obuf
, old_buf
);
1480 set_marker_both (old_buf
->pt_marker
, obuf
,
1481 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1483 if (! NILP (old_buf
->begv_marker
))
1486 XSETBUFFER (obuf
, old_buf
);
1487 set_marker_both (old_buf
->begv_marker
, obuf
,
1488 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1490 if (! NILP (old_buf
->zv_marker
))
1493 XSETBUFFER (obuf
, old_buf
);
1494 set_marker_both (old_buf
->zv_marker
, obuf
,
1495 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1499 /* Get the undo list from the base buffer, so that it appears
1500 that an indirect buffer shares the undo list of its base. */
1502 b
->undo_list
= b
->base_buffer
->undo_list
;
1504 /* If the new current buffer has markers to record PT, BEGV and ZV
1505 when it is not current, fetch them now. */
1506 if (! NILP (b
->pt_marker
))
1508 BUF_PT (b
) = marker_position (b
->pt_marker
);
1509 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1511 if (! NILP (b
->begv_marker
))
1513 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1514 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1516 if (! NILP (b
->zv_marker
))
1518 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1519 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1522 /* Look down buffer's list of local Lisp variables
1523 to find and update any that forward into C variables. */
1525 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1527 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1528 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1529 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1530 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1531 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1532 /* Just reference the variable
1533 to cause it to become set for this buffer. */
1534 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1537 /* Do the same with any others that were local to the previous buffer */
1540 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1542 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1543 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1544 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1545 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1546 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1547 /* Just reference the variable
1548 to cause it to become set for this buffer. */
1549 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1553 /* Switch to buffer B temporarily for redisplay purposes.
1554 This avoids certain things that don't need to be done within redisplay. */
1560 register struct buffer
*old_buf
;
1562 if (current_buffer
== b
)
1565 old_buf
= current_buffer
;
1570 /* If the old current buffer has markers to record PT, BEGV and ZV
1571 when it is not current, update them now. */
1572 if (! NILP (old_buf
->pt_marker
))
1575 XSETBUFFER (obuf
, old_buf
);
1576 set_marker_both (old_buf
->pt_marker
, obuf
,
1577 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1579 if (! NILP (old_buf
->begv_marker
))
1582 XSETBUFFER (obuf
, old_buf
);
1583 set_marker_both (old_buf
->begv_marker
, obuf
,
1584 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1586 if (! NILP (old_buf
->zv_marker
))
1589 XSETBUFFER (obuf
, old_buf
);
1590 set_marker_both (old_buf
->zv_marker
, obuf
,
1591 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1595 /* If the new current buffer has markers to record PT, BEGV and ZV
1596 when it is not current, fetch them now. */
1597 if (! NILP (b
->pt_marker
))
1599 BUF_PT (b
) = marker_position (b
->pt_marker
);
1600 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1602 if (! NILP (b
->begv_marker
))
1604 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1605 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1607 if (! NILP (b
->zv_marker
))
1609 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1610 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1614 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1615 "Make the buffer BUFFER current for editing operations.\n\
1616 BUFFER may be a buffer or the name of an existing buffer.\n\
1617 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1618 This function does not display the buffer, so its effect ends\n\
1619 when the current command terminates.\n\
1620 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1622 register Lisp_Object buffer
;
1624 register Lisp_Object buf
;
1625 buf
= Fget_buffer (buffer
);
1628 if (NILP (XBUFFER (buf
)->name
))
1629 error ("Selecting deleted buffer");
1630 set_buffer_internal (XBUFFER (buf
));
1634 /* Set the current buffer to BUFFER provided it is alive. */
1637 set_buffer_if_live (buffer
)
1640 if (! NILP (XBUFFER (buffer
)->name
))
1641 Fset_buffer (buffer
);
1645 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1646 Sbarf_if_buffer_read_only
, 0, 0, 0,
1647 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1650 if (!NILP (current_buffer
->read_only
)
1651 && NILP (Vinhibit_read_only
))
1652 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1656 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1657 "Put BUFFER at the end of the list of all buffers.\n\
1658 There it is the least likely candidate for `other-buffer' to return;\n\
1659 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1660 If BUFFER is nil or omitted, bury the current buffer.\n\
1661 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1662 selected window if it is displayed there.")
1664 register Lisp_Object buffer
;
1666 /* Figure out what buffer we're going to bury. */
1669 XSETBUFFER (buffer
, current_buffer
);
1671 /* If we're burying the current buffer, unshow it. */
1672 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1678 buf1
= Fget_buffer (buffer
);
1684 /* Move buffer to the end of the buffer list. */
1686 register Lisp_Object aelt
, link
;
1688 aelt
= Frassq (buffer
, Vbuffer_alist
);
1689 link
= Fmemq (aelt
, Vbuffer_alist
);
1690 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1691 XCONS (link
)->cdr
= Qnil
;
1692 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1695 frames_bury_buffer (buffer
);
1700 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1701 "Delete the entire contents of the current buffer.\n\
1702 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1703 so the buffer is truly empty after this.")
1708 if (INTEGERP (current_buffer
->prompt_end_charpos
))
1709 del_range (XINT (current_buffer
->prompt_end_charpos
), Z
);
1713 current_buffer
->last_window_start
= 1;
1714 /* Prevent warnings, or suspension of auto saving, that would happen
1715 if future size is less than past size. Use of erase-buffer
1716 implies that the future text is not really related to the past text. */
1717 XSETFASTINT (current_buffer
->save_length
, 0);
1722 validate_region (b
, e
)
1723 register Lisp_Object
*b
, *e
;
1725 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1726 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1728 if (XINT (*b
) > XINT (*e
))
1731 tem
= *b
; *b
= *e
; *e
= tem
;
1734 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1735 && XINT (*e
) <= ZV
))
1736 args_out_of_range (*b
, *e
);
1739 /* Advance BYTE_POS up to a character boundary
1740 and return the adjusted position. */
1743 advance_to_char_boundary (byte_pos
)
1748 if (byte_pos
== BEG
)
1749 /* Beginning of buffer is always a character boundary. */
1752 c
= FETCH_BYTE (byte_pos
);
1753 if (! CHAR_HEAD_P (c
))
1755 /* We should advance BYTE_POS only when C is a constituent of a
1756 multibyte sequence. */
1759 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1760 surely advance to the correct character boundary. If C is
1761 not, BYTE_POS was unchanged. */
1767 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1769 "Set the multibyte flag of the current buffer to FLAG.\n\
1770 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1771 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1772 The buffer contents remain unchanged as a sequence of bytes\n\
1773 but the contents viewed as characters do change.")
1777 Lisp_Object tail
, markers
;
1778 struct buffer
*other
;
1780 if (current_buffer
->base_buffer
)
1781 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1783 /* Do nothing if nothing actually changes. */
1784 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1787 /* It would be better to update the list,
1788 but this is good enough for now. */
1789 if (! EQ (current_buffer
->undo_list
, Qt
))
1790 current_buffer
->undo_list
= Qnil
;
1792 /* If the cached position is for this buffer, clear it out. */
1793 clear_charpos_cache (current_buffer
);
1797 /* Do this first, so it can use CHAR_TO_BYTE
1798 to calculate the old correspondences. */
1799 set_intervals_multibyte (0);
1801 current_buffer
->enable_multibyte_characters
= Qnil
;
1807 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1809 tail
= BUF_MARKERS (current_buffer
);
1810 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1812 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1813 tail
= XMARKER (tail
)->chain
;
1818 /* Be sure not to have a multibyte sequence striding over the GAP.
1819 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1820 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1822 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1823 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1825 unsigned char *p
= GPT_ADDR
- 1;
1827 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1828 if (BASE_LEADING_CODE_P (*p
))
1830 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1832 move_gap_both (new_gpt
, new_gpt
);
1836 /* Do this first, so that chars_in_text asks the right question.
1837 set_intervals_multibyte needs it too. */
1838 current_buffer
->enable_multibyte_characters
= Qt
;
1840 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1841 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1843 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1845 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1846 if (BEGV_BYTE
> GPT_BYTE
)
1847 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1849 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1851 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1852 if (ZV_BYTE
> GPT_BYTE
)
1853 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1855 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1858 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1861 if (pt_byte
> GPT_BYTE
)
1862 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1864 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1865 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1868 tail
= markers
= BUF_MARKERS (current_buffer
);
1870 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
1871 getting confused by the markers that have not yet been updated.
1872 It is also a signal that it should never create a marker. */
1873 BUF_MARKERS (current_buffer
) = Qnil
;
1875 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1877 XMARKER (tail
)->bytepos
1878 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1879 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1881 tail
= XMARKER (tail
)->chain
;
1884 /* Make sure no markers were put on the chain
1885 while the chain value was incorrect. */
1886 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
1889 BUF_MARKERS (current_buffer
) = markers
;
1891 /* Do this last, so it can calculate the new correspondences
1892 between chars and bytes. */
1893 set_intervals_multibyte (1);
1896 /* Copy this buffer's new multibyte status
1897 into all of its indirect buffers. */
1898 for (other
= all_buffers
; other
; other
= other
->next
)
1899 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
1900 other
->enable_multibyte_characters
1901 = current_buffer
->enable_multibyte_characters
;
1906 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1908 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1909 Most local variable bindings are eliminated so that the default values\n\
1910 become effective once more. Also, the syntax table is set from\n\
1911 `standard-syntax-table', the local keymap is set to nil,\n\
1912 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1913 This function also forces redisplay of the mode line.\n\
1915 Every function to select a new major mode starts by\n\
1916 calling this function.\n\n\
1917 As a special exception, local variables whose names have\n\
1918 a non-nil `permanent-local' property are not eliminated by this function.\n\
1920 The first thing this function does is run\n\
1921 the normal hook `change-major-mode-hook'.")
1924 register Lisp_Object alist
, sym
, tem
;
1927 if (!NILP (Vrun_hooks
))
1928 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1929 oalist
= current_buffer
->local_var_alist
;
1931 /* Make sure none of the bindings in oalist
1932 remain swapped in, in their symbols. */
1934 swap_out_buffer_local_variables (current_buffer
);
1936 /* Actually eliminate all local bindings of this buffer. */
1938 reset_buffer_local_variables (current_buffer
, 0);
1940 /* Redisplay mode lines; we are changing major mode. */
1942 update_mode_lines
++;
1944 /* Any which are supposed to be permanent,
1945 make local again, with the same values they had. */
1947 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1949 sym
= XCONS (XCONS (alist
)->car
)->car
;
1950 tem
= Fget (sym
, Qpermanent_local
);
1953 Fmake_local_variable (sym
);
1954 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1958 /* Force mode-line redisplay. Useful here because all major mode
1959 commands call this function. */
1960 update_mode_lines
++;
1965 /* Make sure no local variables remain set up with buffer B
1966 for their current values. */
1969 swap_out_buffer_local_variables (b
)
1972 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1974 XSETBUFFER (buffer
, b
);
1975 oalist
= b
->local_var_alist
;
1977 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1979 sym
= XCONS (XCONS (alist
)->car
)->car
;
1981 /* Need not do anything if some other buffer's binding is now encached. */
1982 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
1983 if (XBUFFER (tem
) == current_buffer
)
1985 /* Symbol is set up for this buffer's old local value.
1986 Set it up for the current buffer with the default value. */
1988 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
1989 /* Store the symbol's current value into the alist entry
1990 it is currently set up for. This is so that, if the
1991 local is marked permanent, and we make it local again
1992 later in Fkill_all_local_variables, we don't lose the value. */
1993 XCONS (XCONS (tem
)->car
)->cdr
1994 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
1995 /* Switch to the symbol's default-value alist entry. */
1996 XCONS (tem
)->car
= tem
;
1997 /* Mark it as current for buffer B. */
1998 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
1999 /* Store the current value into any forwarding in the symbol. */
2000 store_symval_forwarding (sym
,
2001 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
2007 /* Find all the overlays in the current buffer that contain position POS.
2008 Return the number found, and store them in a vector in *VEC_PTR.
2009 Store in *LEN_PTR the size allocated for the vector.
2010 Store in *NEXT_PTR the next position after POS where an overlay starts,
2011 or ZV if there are no more overlays.
2012 Store in *PREV_PTR the previous position before POS where an overlay ends,
2013 or where an overlay starts which ends at or after POS;
2014 or BEGV if there are no such overlays.
2015 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2017 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2018 when this function is called.
2020 If EXTEND is non-zero, we make the vector bigger if necessary.
2021 If EXTEND is zero, we never extend the vector,
2022 and we store only as many overlays as will fit.
2023 But we still return the total number of overlays. */
2026 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2029 Lisp_Object
**vec_ptr
;
2034 Lisp_Object tail
, overlay
, start
, end
;
2037 Lisp_Object
*vec
= *vec_ptr
;
2040 int inhibit_storing
= 0;
2042 for (tail
= current_buffer
->overlays_before
;
2044 tail
= XCONS (tail
)->cdr
)
2046 int startpos
, endpos
;
2048 overlay
= XCONS (tail
)->car
;
2050 start
= OVERLAY_START (overlay
);
2051 end
= OVERLAY_END (overlay
);
2052 endpos
= OVERLAY_POSITION (end
);
2059 startpos
= OVERLAY_POSITION (start
);
2060 /* This one ends at or after POS
2061 so its start counts for PREV_PTR if it's before POS. */
2062 if (prev
< startpos
&& startpos
< pos
)
2066 if (startpos
<= pos
)
2070 /* The supplied vector is full.
2071 Either make it bigger, or don't store any more in it. */
2074 /* Make it work with an initial len == 0. */
2079 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2083 inhibit_storing
= 1;
2086 if (!inhibit_storing
)
2088 /* Keep counting overlays even if we can't return them all. */
2091 else if (startpos
< next
)
2095 for (tail
= current_buffer
->overlays_after
;
2097 tail
= XCONS (tail
)->cdr
)
2099 int startpos
, endpos
;
2101 overlay
= XCONS (tail
)->car
;
2103 start
= OVERLAY_START (overlay
);
2104 end
= OVERLAY_END (overlay
);
2105 startpos
= OVERLAY_POSITION (start
);
2108 if (startpos
< next
)
2112 endpos
= OVERLAY_POSITION (end
);
2119 *len_ptr
= len
*= 2;
2122 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2126 inhibit_storing
= 1;
2129 if (!inhibit_storing
)
2133 if (startpos
< pos
&& startpos
> prev
)
2136 else if (endpos
< pos
&& endpos
> prev
)
2138 else if (endpos
== pos
&& startpos
> prev
)
2149 /* Find all the overlays in the current buffer that overlap the range BEG-END
2150 or are empty at BEG.
2152 Return the number found, and store them in a vector in *VEC_PTR.
2153 Store in *LEN_PTR the size allocated for the vector.
2154 Store in *NEXT_PTR the next position after POS where an overlay starts,
2155 or ZV if there are no more overlays.
2156 Store in *PREV_PTR the previous position before POS where an overlay ends,
2157 or BEGV if there are no previous overlays.
2158 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2160 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2161 when this function is called.
2163 If EXTEND is non-zero, we make the vector bigger if necessary.
2164 If EXTEND is zero, we never extend the vector,
2165 and we store only as many overlays as will fit.
2166 But we still return the total number of overlays. */
2169 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2172 Lisp_Object
**vec_ptr
;
2177 Lisp_Object tail
, overlay
, ostart
, oend
;
2180 Lisp_Object
*vec
= *vec_ptr
;
2183 int inhibit_storing
= 0;
2185 for (tail
= current_buffer
->overlays_before
;
2187 tail
= XCONS (tail
)->cdr
)
2189 int startpos
, endpos
;
2191 overlay
= XCONS (tail
)->car
;
2193 ostart
= OVERLAY_START (overlay
);
2194 oend
= OVERLAY_END (overlay
);
2195 endpos
= OVERLAY_POSITION (oend
);
2202 startpos
= OVERLAY_POSITION (ostart
);
2203 /* Count an interval if it either overlaps the range
2204 or is empty at the start of the range. */
2205 if ((beg
< endpos
&& startpos
< end
)
2206 || (startpos
== endpos
&& beg
== endpos
))
2210 /* The supplied vector is full.
2211 Either make it bigger, or don't store any more in it. */
2214 *len_ptr
= len
*= 2;
2215 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2219 inhibit_storing
= 1;
2222 if (!inhibit_storing
)
2224 /* Keep counting overlays even if we can't return them all. */
2227 else if (startpos
< next
)
2231 for (tail
= current_buffer
->overlays_after
;
2233 tail
= XCONS (tail
)->cdr
)
2235 int startpos
, endpos
;
2237 overlay
= XCONS (tail
)->car
;
2239 ostart
= OVERLAY_START (overlay
);
2240 oend
= OVERLAY_END (overlay
);
2241 startpos
= OVERLAY_POSITION (ostart
);
2244 if (startpos
< next
)
2248 endpos
= OVERLAY_POSITION (oend
);
2249 /* Count an interval if it either overlaps the range
2250 or is empty at the start of the range. */
2251 if ((beg
< endpos
&& startpos
< end
)
2252 || (startpos
== endpos
&& beg
== endpos
))
2258 *len_ptr
= len
*= 2;
2259 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2263 inhibit_storing
= 1;
2266 if (!inhibit_storing
)
2270 else if (endpos
< beg
&& endpos
> prev
)
2281 /* Fast function to just test if we're at an overlay boundary. */
2283 overlay_touches_p (pos
)
2286 Lisp_Object tail
, overlay
;
2288 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2289 tail
= XCONS (tail
)->cdr
)
2293 overlay
= XCONS (tail
)->car
;
2294 if (!GC_OVERLAYP (overlay
))
2297 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2300 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2304 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2305 tail
= XCONS (tail
)->cdr
)
2309 overlay
= XCONS (tail
)->car
;
2310 if (!GC_OVERLAYP (overlay
))
2313 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2316 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2324 Lisp_Object overlay
;
2330 compare_overlays (v1
, v2
)
2331 const void *v1
, *v2
;
2333 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2334 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2335 if (s1
->priority
!= s2
->priority
)
2336 return s1
->priority
- s2
->priority
;
2337 if (s1
->beg
!= s2
->beg
)
2338 return s1
->beg
- s2
->beg
;
2339 if (s1
->end
!= s2
->end
)
2340 return s2
->end
- s1
->end
;
2344 /* Sort an array of overlays by priority. The array is modified in place.
2345 The return value is the new size; this may be smaller than the original
2346 size if some of the overlays were invalid or were window-specific. */
2348 sort_overlays (overlay_vec
, noverlays
, w
)
2349 Lisp_Object
*overlay_vec
;
2354 struct sortvec
*sortvec
;
2355 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2357 /* Put the valid and relevant overlays into sortvec. */
2359 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2362 Lisp_Object overlay
;
2364 overlay
= overlay_vec
[i
];
2365 if (OVERLAY_VALID (overlay
)
2366 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2367 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2369 /* If we're interested in a specific window, then ignore
2370 overlays that are limited to some other window. */
2375 window
= Foverlay_get (overlay
, Qwindow
);
2376 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2380 /* This overlay is good and counts: put it into sortvec. */
2381 sortvec
[j
].overlay
= overlay
;
2382 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2383 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2384 tem
= Foverlay_get (overlay
, Qpriority
);
2386 sortvec
[j
].priority
= XINT (tem
);
2388 sortvec
[j
].priority
= 0;
2394 /* Sort the overlays into the proper order: increasing priority. */
2397 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2399 for (i
= 0; i
< noverlays
; i
++)
2400 overlay_vec
[i
] = sortvec
[i
].overlay
;
2406 Lisp_Object string
, string2
;
2413 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2414 int size
; /* Allocated length of that array. */
2415 int used
; /* How much of the array is currently in use. */
2416 int bytes
; /* Total length of the strings in buf. */
2419 /* Buffers for storing information about the overlays touching a given
2420 position. These could be automatic variables in overlay_strings, but
2421 it's more efficient to hold onto the memory instead of repeatedly
2422 allocating and freeing it. */
2423 static struct sortstrlist overlay_heads
, overlay_tails
;
2424 static unsigned char *overlay_str_buf
;
2426 /* Allocated length of overlay_str_buf. */
2427 static int overlay_str_len
;
2429 /* A comparison function suitable for passing to qsort. */
2431 cmp_for_strings (as1
, as2
)
2434 struct sortstr
*s1
= (struct sortstr
*)as1
;
2435 struct sortstr
*s2
= (struct sortstr
*)as2
;
2436 if (s1
->size
!= s2
->size
)
2437 return s2
->size
- s1
->size
;
2438 if (s1
->priority
!= s2
->priority
)
2439 return s1
->priority
- s2
->priority
;
2444 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2445 struct sortstrlist
*ssl
;
2446 Lisp_Object str
, str2
, pri
;
2451 if (ssl
->used
== ssl
->size
)
2457 ssl
->buf
= ((struct sortstr
*)
2458 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2460 ssl
->buf
[ssl
->used
].string
= str
;
2461 ssl
->buf
[ssl
->used
].string2
= str2
;
2462 ssl
->buf
[ssl
->used
].size
= size
;
2463 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2466 if (NILP (current_buffer
->enable_multibyte_characters
))
2467 nbytes
= XSTRING (str
)->size
;
2468 else if (! STRING_MULTIBYTE (str
))
2469 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2470 STRING_BYTES (XSTRING (str
)));
2472 nbytes
= STRING_BYTES (XSTRING (str
));
2474 ssl
->bytes
+= nbytes
;
2478 if (NILP (current_buffer
->enable_multibyte_characters
))
2479 nbytes
= XSTRING (str2
)->size
;
2480 else if (! STRING_MULTIBYTE (str2
))
2481 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2482 STRING_BYTES (XSTRING (str2
)));
2484 nbytes
= STRING_BYTES (XSTRING (str2
));
2486 ssl
->bytes
+= nbytes
;
2490 /* Return the concatenation of the strings associated with overlays that
2491 begin or end at POS, ignoring overlays that are specific to a window
2492 other than W. The strings are concatenated in the appropriate order:
2493 shorter overlays nest inside longer ones, and higher priority inside
2494 lower. Normally all of the after-strings come first, but zero-sized
2495 overlays have their after-strings ride along with the before-strings
2496 because it would look strange to print them inside-out.
2498 Returns the string length, and stores the contents indirectly through
2499 PSTR, if that variable is non-null. The string may be overwritten by
2500 subsequent calls. */
2503 overlay_strings (pos
, w
, pstr
)
2506 unsigned char **pstr
;
2508 Lisp_Object ov
, overlay
, window
, str
;
2509 int startpos
, endpos
;
2510 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2512 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2513 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2514 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2516 overlay
= XCONS (ov
)->car
;
2517 if (!OVERLAYP (overlay
))
2520 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2521 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2524 if (endpos
!= pos
&& startpos
!= pos
)
2526 window
= Foverlay_get (overlay
, Qwindow
);
2527 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2530 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2531 record_overlay_string (&overlay_heads
, str
,
2533 ? Foverlay_get (overlay
, Qafter_string
)
2535 Foverlay_get (overlay
, Qpriority
),
2537 else if (endpos
== pos
2538 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2539 record_overlay_string (&overlay_tails
, str
, Qnil
,
2540 Foverlay_get (overlay
, Qpriority
),
2543 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2545 overlay
= XCONS (ov
)->car
;
2546 if (!OVERLAYP (overlay
))
2549 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2550 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2553 if (endpos
!= pos
&& startpos
!= pos
)
2555 window
= Foverlay_get (overlay
, Qwindow
);
2556 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2559 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2560 record_overlay_string (&overlay_heads
, str
,
2562 ? Foverlay_get (overlay
, Qafter_string
)
2564 Foverlay_get (overlay
, Qpriority
),
2566 else if (endpos
== pos
2567 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2568 record_overlay_string (&overlay_tails
, str
, Qnil
,
2569 Foverlay_get (overlay
, Qpriority
),
2572 if (overlay_tails
.used
> 1)
2573 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2575 if (overlay_heads
.used
> 1)
2576 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2578 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2583 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2585 if (total
> overlay_str_len
)
2587 overlay_str_len
= total
;
2588 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2591 p
= overlay_str_buf
;
2592 for (i
= overlay_tails
.used
; --i
>= 0;)
2595 tem
= overlay_tails
.buf
[i
].string
;
2596 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2597 STRING_BYTES (XSTRING (tem
)),
2598 STRING_MULTIBYTE (tem
), multibyte
);
2601 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2604 tem
= overlay_heads
.buf
[i
].string
;
2605 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2606 STRING_BYTES (XSTRING (tem
)),
2607 STRING_MULTIBYTE (tem
), multibyte
);
2609 tem
= overlay_heads
.buf
[i
].string2
;
2612 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2613 STRING_BYTES (XSTRING (tem
)),
2614 STRING_MULTIBYTE (tem
), multibyte
);
2618 if (p
!= overlay_str_buf
+ total
)
2621 *pstr
= overlay_str_buf
;
2627 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2630 recenter_overlay_lists (buf
, pos
)
2634 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2636 /* See if anything in overlays_before should move to overlays_after. */
2638 /* We don't strictly need prev in this loop; it should always be nil.
2639 But we use it for symmetry and in case that should cease to be true
2640 with some future change. */
2642 for (tail
= buf
->overlays_before
;
2644 prev
= tail
, tail
= next
)
2646 next
= XCONS (tail
)->cdr
;
2647 overlay
= XCONS (tail
)->car
;
2649 /* If the overlay is not valid, get rid of it. */
2650 if (!OVERLAY_VALID (overlay
))
2655 /* Splice the cons cell TAIL out of overlays_before. */
2657 XCONS (prev
)->cdr
= next
;
2659 buf
->overlays_before
= next
;
2665 beg
= OVERLAY_START (overlay
);
2666 end
= OVERLAY_END (overlay
);
2668 if (OVERLAY_POSITION (end
) > pos
)
2670 /* OVERLAY needs to be moved. */
2671 int where
= OVERLAY_POSITION (beg
);
2672 Lisp_Object other
, other_prev
;
2674 /* Splice the cons cell TAIL out of overlays_before. */
2676 XCONS (prev
)->cdr
= next
;
2678 buf
->overlays_before
= next
;
2680 /* Search thru overlays_after for where to put it. */
2682 for (other
= buf
->overlays_after
;
2684 other_prev
= other
, other
= XCONS (other
)->cdr
)
2686 Lisp_Object otherbeg
, otheroverlay
;
2688 otheroverlay
= XCONS (other
)->car
;
2689 if (! OVERLAY_VALID (otheroverlay
))
2692 otherbeg
= OVERLAY_START (otheroverlay
);
2693 if (OVERLAY_POSITION (otherbeg
) >= where
)
2697 /* Add TAIL to overlays_after before OTHER. */
2698 XCONS (tail
)->cdr
= other
;
2699 if (!NILP (other_prev
))
2700 XCONS (other_prev
)->cdr
= tail
;
2702 buf
->overlays_after
= tail
;
2706 /* We've reached the things that should stay in overlays_before.
2707 All the rest of overlays_before must end even earlier,
2712 /* See if anything in overlays_after should be in overlays_before. */
2714 for (tail
= buf
->overlays_after
;
2716 prev
= tail
, tail
= next
)
2718 next
= XCONS (tail
)->cdr
;
2719 overlay
= XCONS (tail
)->car
;
2721 /* If the overlay is not valid, get rid of it. */
2722 if (!OVERLAY_VALID (overlay
))
2727 /* Splice the cons cell TAIL out of overlays_after. */
2729 XCONS (prev
)->cdr
= next
;
2731 buf
->overlays_after
= next
;
2737 beg
= OVERLAY_START (overlay
);
2738 end
= OVERLAY_END (overlay
);
2740 /* Stop looking, when we know that nothing further
2741 can possibly end before POS. */
2742 if (OVERLAY_POSITION (beg
) > pos
)
2745 if (OVERLAY_POSITION (end
) <= pos
)
2747 /* OVERLAY needs to be moved. */
2748 int where
= OVERLAY_POSITION (end
);
2749 Lisp_Object other
, other_prev
;
2751 /* Splice the cons cell TAIL out of overlays_after. */
2753 XCONS (prev
)->cdr
= next
;
2755 buf
->overlays_after
= next
;
2757 /* Search thru overlays_before for where to put it. */
2759 for (other
= buf
->overlays_before
;
2761 other_prev
= other
, other
= XCONS (other
)->cdr
)
2763 Lisp_Object otherend
, otheroverlay
;
2765 otheroverlay
= XCONS (other
)->car
;
2766 if (! OVERLAY_VALID (otheroverlay
))
2769 otherend
= OVERLAY_END (otheroverlay
);
2770 if (OVERLAY_POSITION (otherend
) <= where
)
2774 /* Add TAIL to overlays_before before OTHER. */
2775 XCONS (tail
)->cdr
= other
;
2776 if (!NILP (other_prev
))
2777 XCONS (other_prev
)->cdr
= tail
;
2779 buf
->overlays_before
= tail
;
2784 XSETFASTINT (buf
->overlay_center
, pos
);
2788 adjust_overlays_for_insert (pos
, length
)
2792 /* After an insertion, the lists are still sorted properly,
2793 but we may need to update the value of the overlay center. */
2794 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2795 XSETFASTINT (current_buffer
->overlay_center
,
2796 XFASTINT (current_buffer
->overlay_center
) + length
);
2800 adjust_overlays_for_delete (pos
, length
)
2804 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2805 /* The deletion was to our right. No change needed; the before- and
2806 after-lists are still consistent. */
2808 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2809 /* The deletion was to our left. We need to adjust the center value
2810 to account for the change in position, but the lists are consistent
2811 given the new value. */
2812 XSETFASTINT (current_buffer
->overlay_center
,
2813 XFASTINT (current_buffer
->overlay_center
) - length
);
2815 /* We're right in the middle. There might be things on the after-list
2816 that now belong on the before-list. Recentering will move them,
2817 and also update the center point. */
2818 recenter_overlay_lists (current_buffer
, pos
);
2821 /* Fix up overlays that were garbled as a result of permuting markers
2822 in the range START through END. Any overlay with at least one
2823 endpoint in this range will need to be unlinked from the overlay
2824 list and reinserted in its proper place.
2825 Such an overlay might even have negative size at this point.
2826 If so, we'll reverse the endpoints. Can you think of anything
2827 better to do in this situation? */
2829 fix_overlays_in_range (start
, end
)
2830 register int start
, end
;
2832 Lisp_Object overlay
;
2833 Lisp_Object before_list
, after_list
;
2834 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2835 int startpos
, endpos
;
2837 /* This algorithm shifts links around instead of consing and GCing.
2838 The loop invariant is that before_list (resp. after_list) is a
2839 well-formed list except that its last element, the one that
2840 *pbefore (resp. *pafter) points to, is still uninitialized.
2841 So it's not a bug that before_list isn't initialized, although
2842 it may look strange. */
2843 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2845 overlay
= XCONS (*ptail
)->car
;
2846 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2849 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2851 || (startpos
>= start
&& startpos
< end
))
2853 /* If the overlay is backwards, fix that now. */
2854 if (startpos
> endpos
)
2857 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2859 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2861 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2863 /* Add it to the end of the wrong list. Later on,
2864 recenter_overlay_lists will move it to the right place. */
2865 if (endpos
< XINT (current_buffer
->overlay_center
))
2868 pafter
= &XCONS (*ptail
)->cdr
;
2873 pbefore
= &XCONS (*ptail
)->cdr
;
2875 *ptail
= XCONS (*ptail
)->cdr
;
2878 ptail
= &XCONS (*ptail
)->cdr
;
2880 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2882 overlay
= XCONS (*ptail
)->car
;
2883 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2884 if (startpos
>= end
)
2886 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2887 if (startpos
>= start
2888 || (endpos
>= start
&& endpos
< end
))
2890 if (startpos
> endpos
)
2893 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2895 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2897 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2899 if (endpos
< XINT (current_buffer
->overlay_center
))
2902 pafter
= &XCONS (*ptail
)->cdr
;
2907 pbefore
= &XCONS (*ptail
)->cdr
;
2909 *ptail
= XCONS (*ptail
)->cdr
;
2912 ptail
= &XCONS (*ptail
)->cdr
;
2915 /* Splice the constructed (wrong) lists into the buffer's lists,
2916 and let the recenter function make it sane again. */
2917 *pbefore
= current_buffer
->overlays_before
;
2918 current_buffer
->overlays_before
= before_list
;
2919 recenter_overlay_lists (current_buffer
,
2920 XINT (current_buffer
->overlay_center
));
2922 *pafter
= current_buffer
->overlays_after
;
2923 current_buffer
->overlays_after
= after_list
;
2924 recenter_overlay_lists (current_buffer
,
2925 XINT (current_buffer
->overlay_center
));
2928 /* We have two types of overlay: the one whose ending marker is
2929 after-insertion-marker (this is the usual case) and the one whose
2930 ending marker is before-insertion-marker. When `overlays_before'
2931 contains overlays of the latter type and the former type in this
2932 order and both overlays end at inserting position, inserting a text
2933 increases only the ending marker of the latter type, which results
2934 in incorrect ordering of `overlays_before'.
2936 This function fixes ordering of overlays in the slot
2937 `overlays_before' of the buffer *BP. Before the insertion, `point'
2938 was at PREV, and now is at POS. */
2941 fix_overlays_before (bp
, prev
, pos
)
2945 Lisp_Object
*tailp
= &bp
->overlays_before
;
2946 Lisp_Object
*right_place
;
2949 /* After the insertion, the several overlays may be in incorrect
2950 order. The possibility is that, in the list `overlays_before',
2951 an overlay which ends at POS appears after an overlay which ends
2952 at PREV. Since POS is greater than PREV, we must fix the
2953 ordering of these overlays, by moving overlays ends at POS before
2954 the overlays ends at PREV. */
2956 /* At first, find a place where disordered overlays should be linked
2957 in. It is where an overlay which end before POS exists. (i.e. an
2958 overlay whose ending marker is after-insertion-marker if disorder
2960 while (!NILP (*tailp
)
2961 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2963 tailp
= &XCONS (*tailp
)->cdr
;
2965 /* If we don't find such an overlay,
2966 or the found one ends before PREV,
2967 or the found one is the last one in the list,
2968 we don't have to fix anything. */
2971 || NILP (XCONS (*tailp
)->cdr
))
2974 right_place
= tailp
;
2975 tailp
= &XCONS (*tailp
)->cdr
;
2977 /* Now, end position of overlays in the list *TAILP should be before
2978 or equal to PREV. In the loop, an overlay which ends at POS is
2979 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2980 overlay which ends before PREV, the remaining overlays are in
2982 while (!NILP (*tailp
))
2984 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2987 { /* This overlay is disordered. */
2988 Lisp_Object found
= *tailp
;
2990 /* Unlink the found overlay. */
2991 *tailp
= XCONS (found
)->cdr
;
2992 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2993 XCONS (found
)->cdr
= *right_place
;
2994 /* Link it into the right place. */
2995 *right_place
= found
;
2997 else if (end
== prev
)
2998 tailp
= &XCONS (*tailp
)->cdr
;
2999 else /* No more disordered overlay. */
3004 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3005 "Return t if OBJECT is an overlay.")
3009 return (OVERLAYP (object
) ? Qt
: Qnil
);
3012 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3013 "Create a new overlay with range BEG to END in BUFFER.\n\
3014 If omitted, BUFFER defaults to the current buffer.\n\
3015 BEG and END may be integers or markers.\n\
3016 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
3017 front delimiter advance when text is inserted there.\n\
3018 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
3019 rear delimiter advance when text is inserted there.")
3020 (beg
, end
, buffer
, front_advance
, rear_advance
)
3021 Lisp_Object beg
, end
, buffer
;
3022 Lisp_Object front_advance
, rear_advance
;
3024 Lisp_Object overlay
;
3028 XSETBUFFER (buffer
, current_buffer
);
3030 CHECK_BUFFER (buffer
, 2);
3032 && ! EQ (Fmarker_buffer (beg
), buffer
))
3033 error ("Marker points into wrong buffer");
3035 && ! EQ (Fmarker_buffer (end
), buffer
))
3036 error ("Marker points into wrong buffer");
3038 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3039 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3041 if (XINT (beg
) > XINT (end
))
3044 temp
= beg
; beg
= end
; end
= temp
;
3047 b
= XBUFFER (buffer
);
3049 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3050 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3052 if (!NILP (front_advance
))
3053 XMARKER (beg
)->insertion_type
= 1;
3054 if (!NILP (rear_advance
))
3055 XMARKER (end
)->insertion_type
= 1;
3057 overlay
= allocate_misc ();
3058 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3059 XOVERLAY (overlay
)->start
= beg
;
3060 XOVERLAY (overlay
)->end
= end
;
3061 XOVERLAY (overlay
)->plist
= Qnil
;
3063 /* Put the new overlay on the wrong list. */
3064 end
= OVERLAY_END (overlay
);
3065 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3066 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3068 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3070 /* This puts it in the right list, and in the right order. */
3071 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3073 /* We don't need to redisplay the region covered by the overlay, because
3074 the overlay has no properties at the moment. */
3079 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3082 modify_overlay (buf
, start
, end
)
3092 start
= end
; end
= temp
;
3095 /* If this is a buffer not in the selected window,
3096 we must do other windows. */
3097 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3098 windows_or_buffers_changed
= 1;
3099 /* If multiple windows show this buffer, we must do other windows. */
3100 else if (buffer_shared
> 1)
3101 windows_or_buffers_changed
= 1;
3103 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3105 ++BUF_OVERLAY_MODIFF (buf
);
3109 Lisp_Object
Fdelete_overlay ();
3111 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3112 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3113 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3114 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3116 (overlay
, beg
, end
, buffer
)
3117 Lisp_Object overlay
, beg
, end
, buffer
;
3119 struct buffer
*b
, *ob
;
3120 Lisp_Object obuffer
;
3121 int count
= specpdl_ptr
- specpdl
;
3123 CHECK_OVERLAY (overlay
, 0);
3125 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3127 XSETBUFFER (buffer
, current_buffer
);
3128 CHECK_BUFFER (buffer
, 3);
3131 && ! EQ (Fmarker_buffer (beg
), buffer
))
3132 error ("Marker points into wrong buffer");
3134 && ! EQ (Fmarker_buffer (end
), buffer
))
3135 error ("Marker points into wrong buffer");
3137 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3138 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3140 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3141 return Fdelete_overlay (overlay
);
3143 if (XINT (beg
) > XINT (end
))
3146 temp
= beg
; beg
= end
; end
= temp
;
3149 specbind (Qinhibit_quit
, Qt
);
3151 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3152 b
= XBUFFER (buffer
);
3153 ob
= XBUFFER (obuffer
);
3155 /* If the overlay has changed buffers, do a thorough redisplay. */
3156 if (!EQ (buffer
, obuffer
))
3158 /* Redisplay where the overlay was. */
3159 if (!NILP (obuffer
))
3164 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3165 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3167 modify_overlay (ob
, o_beg
, o_end
);
3170 /* Redisplay where the overlay is going to be. */
3171 modify_overlay (b
, XINT (beg
), XINT (end
));
3174 /* Redisplay the area the overlay has just left, or just enclosed. */
3178 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3179 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3181 if (o_beg
== XINT (beg
))
3182 modify_overlay (b
, o_end
, XINT (end
));
3183 else if (o_end
== XINT (end
))
3184 modify_overlay (b
, o_beg
, XINT (beg
));
3187 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3188 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3189 modify_overlay (b
, o_beg
, o_end
);
3193 if (!NILP (obuffer
))
3195 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3196 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3199 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3200 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3202 /* Put the overlay on the wrong list. */
3203 end
= OVERLAY_END (overlay
);
3204 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3205 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3207 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3209 /* This puts it in the right list, and in the right order. */
3210 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3212 return unbind_to (count
, overlay
);
3215 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3216 "Delete the overlay OVERLAY from its buffer.")
3218 Lisp_Object overlay
;
3222 int count
= specpdl_ptr
- specpdl
;
3224 CHECK_OVERLAY (overlay
, 0);
3226 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3230 b
= XBUFFER (buffer
);
3232 specbind (Qinhibit_quit
, Qt
);
3234 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3235 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3238 marker_position (OVERLAY_START (overlay
)),
3239 marker_position (OVERLAY_END (overlay
)));
3241 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3242 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3244 return unbind_to (count
, Qnil
);
3247 /* Overlay dissection functions. */
3249 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3250 "Return the position at which OVERLAY starts.")
3252 Lisp_Object overlay
;
3254 CHECK_OVERLAY (overlay
, 0);
3256 return (Fmarker_position (OVERLAY_START (overlay
)));
3259 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3260 "Return the position at which OVERLAY ends.")
3262 Lisp_Object overlay
;
3264 CHECK_OVERLAY (overlay
, 0);
3266 return (Fmarker_position (OVERLAY_END (overlay
)));
3269 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3270 "Return the buffer OVERLAY belongs to.")
3272 Lisp_Object overlay
;
3274 CHECK_OVERLAY (overlay
, 0);
3276 return Fmarker_buffer (OVERLAY_START (overlay
));
3279 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3280 "Return a list of the properties on OVERLAY.\n\
3281 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3284 Lisp_Object overlay
;
3286 CHECK_OVERLAY (overlay
, 0);
3288 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3292 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3293 "Return a list of the overlays that contain position POS.")
3298 Lisp_Object
*overlay_vec
;
3302 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3305 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3307 /* Put all the overlays we want in a vector in overlay_vec.
3308 Store the length in len. */
3309 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3310 (int *) 0, (int *) 0);
3312 /* Make a list of them all. */
3313 result
= Flist (noverlays
, overlay_vec
);
3315 xfree (overlay_vec
);
3319 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3320 "Return a list of the overlays that overlap the region BEG ... END.\n\
3321 Overlap means that at least one character is contained within the overlay\n\
3322 and also contained within the specified region.\n\
3323 Empty overlays are included in the result if they are located at BEG\n\
3324 or between BEG and END.")
3326 Lisp_Object beg
, end
;
3329 Lisp_Object
*overlay_vec
;
3333 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3334 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3337 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3339 /* Put all the overlays we want in a vector in overlay_vec.
3340 Store the length in len. */
3341 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3342 (int *) 0, (int *) 0);
3344 /* Make a list of them all. */
3345 result
= Flist (noverlays
, overlay_vec
);
3347 xfree (overlay_vec
);
3351 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3353 "Return the next position after POS where an overlay starts or ends.\n\
3354 If there are no more overlay boundaries after POS, return (point-max).")
3360 Lisp_Object
*overlay_vec
;
3364 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3367 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3369 /* Put all the overlays we want in a vector in overlay_vec.
3370 Store the length in len.
3371 endpos gets the position where the next overlay starts. */
3372 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3373 &endpos
, (int *) 0);
3375 /* If any of these overlays ends before endpos,
3376 use its ending point instead. */
3377 for (i
= 0; i
< noverlays
; i
++)
3382 oend
= OVERLAY_END (overlay_vec
[i
]);
3383 oendpos
= OVERLAY_POSITION (oend
);
3384 if (oendpos
< endpos
)
3388 xfree (overlay_vec
);
3389 return make_number (endpos
);
3392 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3393 Sprevious_overlay_change
, 1, 1, 0,
3394 "Return the previous position before POS where an overlay starts or ends.\n\
3395 If there are no more overlay boundaries before POS, return (point-min).")
3401 Lisp_Object
*overlay_vec
;
3404 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3407 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3409 /* At beginning of buffer, we know the answer;
3410 avoid bug subtracting 1 below. */
3411 if (XINT (pos
) == BEGV
)
3414 /* Put all the overlays we want in a vector in overlay_vec.
3415 Store the length in len.
3416 prevpos gets the position of the previous change. */
3417 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3418 (int *) 0, &prevpos
);
3420 xfree (overlay_vec
);
3421 return make_number (prevpos
);
3424 /* These functions are for debugging overlays. */
3426 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3427 "Return a pair of lists giving all the overlays of the current buffer.\n\
3428 The car has all the overlays before the overlay center;\n\
3429 the cdr has all the overlays after the overlay center.\n\
3430 Recentering overlays moves overlays between these lists.\n\
3431 The lists you get are copies, so that changing them has no effect.\n\
3432 However, the overlays you get are the real objects that the buffer uses.")
3435 Lisp_Object before
, after
;
3436 before
= current_buffer
->overlays_before
;
3438 before
= Fcopy_sequence (before
);
3439 after
= current_buffer
->overlays_after
;
3441 after
= Fcopy_sequence (after
);
3443 return Fcons (before
, after
);
3446 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3447 "Recenter the overlays of the current buffer around position POS.")
3451 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3453 recenter_overlay_lists (current_buffer
, XINT (pos
));
3457 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3458 "Get the property of overlay OVERLAY with property name PROP.")
3460 Lisp_Object overlay
, prop
;
3462 Lisp_Object plist
, fallback
;
3464 CHECK_OVERLAY (overlay
, 0);
3468 for (plist
= XOVERLAY (overlay
)->plist
;
3469 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3470 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3472 if (EQ (XCONS (plist
)->car
, prop
))
3473 return XCONS (XCONS (plist
)->cdr
)->car
;
3474 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3477 tem
= Fcar (Fcdr (plist
));
3479 fallback
= Fget (tem
, prop
);
3486 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3487 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3488 (overlay
, prop
, value
)
3489 Lisp_Object overlay
, prop
, value
;
3491 Lisp_Object tail
, buffer
;
3494 CHECK_OVERLAY (overlay
, 0);
3496 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3498 for (tail
= XOVERLAY (overlay
)->plist
;
3499 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3500 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3501 if (EQ (XCONS (tail
)->car
, prop
))
3503 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3504 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3507 /* It wasn't in the list, so add it to the front. */
3508 changed
= !NILP (value
);
3509 XOVERLAY (overlay
)->plist
3510 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3512 if (! NILP (buffer
))
3515 modify_overlay (XBUFFER (buffer
),
3516 marker_position (OVERLAY_START (overlay
)),
3517 marker_position (OVERLAY_END (overlay
)));
3518 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3519 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3520 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3521 Fdelete_overlay (overlay
);
3526 /* Subroutine of report_overlay_modification. */
3528 /* Lisp vector holding overlay hook functions to call.
3529 Vector elements come in pairs.
3530 Each even-index element is a list of hook functions.
3531 The following odd-index element is the overlay they came from.
3533 Before the buffer change, we fill in this vector
3534 as we call overlay hook functions.
3535 After the buffer change, we get the functions to call from this vector.
3536 This way we always call the same functions before and after the change. */
3537 static Lisp_Object last_overlay_modification_hooks
;
3539 /* Number of elements actually used in last_overlay_modification_hooks. */
3540 static int last_overlay_modification_hooks_used
;
3542 /* Add one functionlist/overlay pair
3543 to the end of last_overlay_modification_hooks. */
3546 add_overlay_mod_hooklist (functionlist
, overlay
)
3547 Lisp_Object functionlist
, overlay
;
3549 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3551 if (last_overlay_modification_hooks_used
== oldsize
)
3554 old
= last_overlay_modification_hooks
;
3555 last_overlay_modification_hooks
3556 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3557 bcopy (XVECTOR (old
)->contents
,
3558 XVECTOR (last_overlay_modification_hooks
)->contents
,
3559 sizeof (Lisp_Object
) * oldsize
);
3561 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3562 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3565 /* Run the modification-hooks of overlays that include
3566 any part of the text in START to END.
3567 If this change is an insertion, also
3568 run the insert-before-hooks of overlay starting at END,
3569 and the insert-after-hooks of overlay ending at START.
3571 This is called both before and after the modification.
3572 AFTER is nonzero when we call after the modification.
3574 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3575 When AFTER is nonzero, they are the start position,
3576 the position after the inserted new text,
3577 and the length of deleted or replaced old text. */
3580 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3581 Lisp_Object start
, end
;
3583 Lisp_Object arg1
, arg2
, arg3
;
3585 Lisp_Object prop
, overlay
, tail
;
3586 /* 1 if this change is an insertion. */
3587 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3589 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3593 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3597 /* Call the functions recorded in last_overlay_modification_hooks
3598 rather than scanning the overlays again.
3599 First copy the vector contents, in case some of these hooks
3600 do subsequent modification of the buffer. */
3601 int size
= last_overlay_modification_hooks_used
;
3602 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3605 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3606 copy
, size
* sizeof (Lisp_Object
));
3608 gcpro1
.nvars
= size
;
3610 for (i
= 0; i
< size
;)
3612 Lisp_Object prop
, overlay
;
3614 overlay
= copy
[i
++];
3615 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3621 /* We are being called before a change.
3622 Scan the overlays to find the functions to call. */
3623 last_overlay_modification_hooks_used
= 0;
3625 for (tail
= current_buffer
->overlays_before
;
3627 tail
= XCONS (tail
)->cdr
)
3629 int startpos
, endpos
;
3630 Lisp_Object ostart
, oend
;
3632 overlay
= XCONS (tail
)->car
;
3634 ostart
= OVERLAY_START (overlay
);
3635 oend
= OVERLAY_END (overlay
);
3636 endpos
= OVERLAY_POSITION (oend
);
3637 if (XFASTINT (start
) > endpos
)
3639 startpos
= OVERLAY_POSITION (ostart
);
3640 if (insertion
&& (XFASTINT (start
) == startpos
3641 || XFASTINT (end
) == startpos
))
3643 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3646 /* Copy TAIL in case the hook recenters the overlay lists. */
3648 tail
= Fcopy_sequence (tail
);
3650 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3653 if (insertion
&& (XFASTINT (start
) == endpos
3654 || XFASTINT (end
) == endpos
))
3656 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3660 tail
= Fcopy_sequence (tail
);
3662 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3665 /* Test for intersecting intervals. This does the right thing
3666 for both insertion and deletion. */
3667 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3669 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3673 tail
= Fcopy_sequence (tail
);
3675 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3681 for (tail
= current_buffer
->overlays_after
;
3683 tail
= XCONS (tail
)->cdr
)
3685 int startpos
, endpos
;
3686 Lisp_Object ostart
, oend
;
3688 overlay
= XCONS (tail
)->car
;
3690 ostart
= OVERLAY_START (overlay
);
3691 oend
= OVERLAY_END (overlay
);
3692 startpos
= OVERLAY_POSITION (ostart
);
3693 endpos
= OVERLAY_POSITION (oend
);
3694 if (XFASTINT (end
) < startpos
)
3696 if (insertion
&& (XFASTINT (start
) == startpos
3697 || XFASTINT (end
) == startpos
))
3699 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3703 tail
= Fcopy_sequence (tail
);
3705 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3708 if (insertion
&& (XFASTINT (start
) == endpos
3709 || XFASTINT (end
) == endpos
))
3711 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3715 tail
= Fcopy_sequence (tail
);
3717 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3720 /* Test for intersecting intervals. This does the right thing
3721 for both insertion and deletion. */
3722 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3724 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3728 tail
= Fcopy_sequence (tail
);
3730 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3739 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3740 Lisp_Object list
, overlay
;
3742 Lisp_Object arg1
, arg2
, arg3
;
3744 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3746 GCPRO4 (list
, arg1
, arg2
, arg3
);
3748 add_overlay_mod_hooklist (list
, overlay
);
3750 while (!NILP (list
))
3753 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3755 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3761 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3764 evaporate_overlays (pos
)
3767 Lisp_Object tail
, overlay
, hit_list
;
3770 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3771 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3772 tail
= XCONS (tail
)->cdr
)
3775 overlay
= XCONS (tail
)->car
;
3776 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3779 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3780 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3781 hit_list
= Fcons (overlay
, hit_list
);
3784 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3785 tail
= XCONS (tail
)->cdr
)
3788 overlay
= XCONS (tail
)->car
;
3789 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3792 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3793 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3794 hit_list
= Fcons (overlay
, hit_list
);
3796 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3797 Fdelete_overlay (XCONS (hit_list
)->car
);
3800 /* Somebody has tried to store a value with an unacceptable type
3801 in the slot with offset OFFSET. */
3804 buffer_slot_type_mismatch (offset
)
3809 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3810 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3812 case Lisp_Int
: type_name
= "integers"; break;
3813 case Lisp_String
: type_name
= "strings"; break;
3814 case Lisp_Symbol
: type_name
= "symbols"; break;
3820 error ("Only %s should be stored in the buffer-local variable %s",
3821 type_name
, XSYMBOL (sym
)->name
->data
);
3827 buffer_permanent_local_flags
= 0;
3829 /* Make sure all markable slots in buffer_defaults
3830 are initialized reasonably, so mark_buffer won't choke. */
3831 reset_buffer (&buffer_defaults
);
3832 reset_buffer_local_variables (&buffer_defaults
, 1);
3833 reset_buffer (&buffer_local_symbols
);
3834 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3835 /* Prevent GC from getting confused. */
3836 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3837 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3838 #ifdef USE_TEXT_PROPERTIES
3839 BUF_INTERVALS (&buffer_defaults
) = 0;
3840 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3842 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3843 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3845 /* Set up the default values of various buffer slots. */
3846 /* Must do these before making the first buffer! */
3848 /* real setup is done in loaddefs.el */
3849 buffer_defaults
.mode_line_format
= build_string ("%-");
3850 buffer_defaults
.header_line_format
= Qnil
;
3851 buffer_defaults
.abbrev_mode
= Qnil
;
3852 buffer_defaults
.overwrite_mode
= Qnil
;
3853 buffer_defaults
.case_fold_search
= Qt
;
3854 buffer_defaults
.auto_fill_function
= Qnil
;
3855 buffer_defaults
.selective_display
= Qnil
;
3857 buffer_defaults
.selective_display_ellipses
= Qt
;
3859 buffer_defaults
.abbrev_table
= Qnil
;
3860 buffer_defaults
.display_table
= Qnil
;
3861 buffer_defaults
.undo_list
= Qnil
;
3862 buffer_defaults
.mark_active
= Qnil
;
3863 buffer_defaults
.file_format
= Qnil
;
3864 buffer_defaults
.overlays_before
= Qnil
;
3865 buffer_defaults
.overlays_after
= Qnil
;
3866 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3868 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3869 buffer_defaults
.truncate_lines
= Qnil
;
3870 buffer_defaults
.ctl_arrow
= Qt
;
3871 buffer_defaults
.direction_reversed
= Qnil
;
3874 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3876 buffer_defaults
.enable_multibyte_characters
= Qt
;
3877 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3878 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3879 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3880 buffer_defaults
.cache_long_line_scans
= Qnil
;
3881 buffer_defaults
.file_truename
= Qnil
;
3882 XSETFASTINT (buffer_defaults
.display_count
, 0);
3883 buffer_defaults
.indicate_empty_lines
= Qnil
;
3884 buffer_defaults
.scroll_up_aggressively
= Qnil
;
3885 buffer_defaults
.scroll_down_aggressively
= Qnil
;
3886 buffer_defaults
.display_time
= Qnil
;
3888 /* Assign the local-flags to the slots that have default values.
3889 The local flag is a bit that is used in the buffer
3890 to say that it has its own local value for the slot.
3891 The local flag bits are in the local_var_flags slot of the buffer. */
3893 /* Nothing can work if this isn't true */
3894 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3896 /* 0 means not a lisp var, -1 means always local, else mask */
3897 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3898 XSETINT (buffer_local_flags
.filename
, -1);
3899 XSETINT (buffer_local_flags
.directory
, -1);
3900 XSETINT (buffer_local_flags
.backed_up
, -1);
3901 XSETINT (buffer_local_flags
.save_length
, -1);
3902 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3903 XSETINT (buffer_local_flags
.read_only
, -1);
3904 XSETINT (buffer_local_flags
.major_mode
, -1);
3905 XSETINT (buffer_local_flags
.mode_name
, -1);
3906 XSETINT (buffer_local_flags
.undo_list
, -1);
3907 XSETINT (buffer_local_flags
.mark_active
, -1);
3908 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3909 XSETINT (buffer_local_flags
.file_truename
, -1);
3910 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3911 XSETINT (buffer_local_flags
.file_format
, -1);
3912 XSETINT (buffer_local_flags
.display_count
, -1);
3913 XSETINT (buffer_local_flags
.display_time
, -1);
3914 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3916 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3917 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3918 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3919 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3920 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3921 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3923 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3925 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3926 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3927 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3928 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3929 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3930 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3931 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3933 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3934 /* Make this one a permanent local. */
3935 buffer_permanent_local_flags
|= 0x4000;
3937 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3938 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3939 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3940 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3941 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3942 /* Make this one a permanent local. */
3943 buffer_permanent_local_flags
|= 0x80000;
3944 XSETFASTINT (buffer_local_flags
.left_margin_width
, 0x100000);
3945 XSETFASTINT (buffer_local_flags
.right_margin_width
, 0x200000);
3946 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, 0x400000);
3947 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, 0x800000);
3948 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, 0x1000000);
3949 XSETFASTINT (buffer_local_flags
.header_line_format
, 0x2000000);
3951 Vbuffer_alist
= Qnil
;
3955 QSFundamental
= build_string ("Fundamental");
3957 Qfundamental_mode
= intern ("fundamental-mode");
3958 buffer_defaults
.major_mode
= Qfundamental_mode
;
3960 Qmode_class
= intern ("mode-class");
3962 Qprotected_field
= intern ("protected-field");
3964 Qpermanent_local
= intern ("permanent-local");
3966 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3968 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3970 /* super-magic invisible buffer */
3971 Vbuffer_alist
= Qnil
;
3973 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3975 inhibit_modification_hooks
= 0;
3981 char buf
[MAXPATHLEN
+1];
3983 struct stat dotstat
, pwdstat
;
3987 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3988 if (NILP (buffer_defaults
.enable_multibyte_characters
))
3989 Fset_buffer_multibyte (Qnil
);
3991 /* If PWD is accurate, use it instead of calling getwd. This is faster
3992 when PWD is right, and may avoid a fatal error. */
3993 if ((pwd
= getenv ("PWD")) != 0
3994 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
3995 && stat (pwd
, &pwdstat
) == 0
3996 && stat (".", &dotstat
) == 0
3997 && dotstat
.st_ino
== pwdstat
.st_ino
3998 && dotstat
.st_dev
== pwdstat
.st_dev
3999 && strlen (pwd
) < MAXPATHLEN
)
4002 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4003 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4005 else if (getwd (buf
) == 0)
4006 fatal ("`getwd' failed: %s\n", buf
);
4010 /* Maybe this should really use some standard subroutine
4011 whose definition is filename syntax dependent. */
4013 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4015 buf
[rc
] = DIRECTORY_SEP
;
4018 #endif /* not VMS */
4020 current_buffer
->directory
= build_string (buf
);
4022 /* Add /: to the front of the name
4023 if it would otherwise be treated as magic. */
4024 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4026 /* If the default dir is just /, TEMP is non-nil
4027 because of the ange-ftp completion handler.
4028 However, it is not necessary to turn / into /:/.
4029 So avoid doing that. */
4030 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4031 current_buffer
->directory
4032 = concat2 (build_string ("/:"), current_buffer
->directory
);
4034 temp
= get_minibuffer (0);
4035 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4038 /* initialize the buffer routines */
4042 staticpro (&last_overlay_modification_hooks
);
4043 last_overlay_modification_hooks
4044 = Fmake_vector (make_number (10), Qnil
);
4046 staticpro (&Vbuffer_defaults
);
4047 staticpro (&Vbuffer_local_symbols
);
4048 staticpro (&Qfundamental_mode
);
4049 staticpro (&Qmode_class
);
4050 staticpro (&QSFundamental
);
4051 staticpro (&Vbuffer_alist
);
4052 staticpro (&Qprotected_field
);
4053 staticpro (&Qpermanent_local
);
4054 staticpro (&Qkill_buffer_hook
);
4055 Qoverlayp
= intern ("overlayp");
4056 staticpro (&Qoverlayp
);
4057 Qevaporate
= intern ("evaporate");
4058 staticpro (&Qevaporate
);
4059 Qmodification_hooks
= intern ("modification-hooks");
4060 staticpro (&Qmodification_hooks
);
4061 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4062 staticpro (&Qinsert_in_front_hooks
);
4063 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4064 staticpro (&Qinsert_behind_hooks
);
4065 Qget_file_buffer
= intern ("get-file-buffer");
4066 staticpro (&Qget_file_buffer
);
4067 Qpriority
= intern ("priority");
4068 staticpro (&Qpriority
);
4069 Qwindow
= intern ("window");
4070 staticpro (&Qwindow
);
4071 Qbefore_string
= intern ("before-string");
4072 staticpro (&Qbefore_string
);
4073 Qafter_string
= intern ("after-string");
4074 staticpro (&Qafter_string
);
4075 Qfirst_change_hook
= intern ("first-change-hook");
4076 staticpro (&Qfirst_change_hook
);
4077 Qbefore_change_functions
= intern ("before-change-functions");
4078 staticpro (&Qbefore_change_functions
);
4079 Qafter_change_functions
= intern ("after-change-functions");
4080 staticpro (&Qafter_change_functions
);
4082 Fput (Qprotected_field
, Qerror_conditions
,
4083 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4084 Fput (Qprotected_field
, Qerror_message
,
4085 build_string ("Attempt to modify a protected field"));
4087 /* All these use DEFVAR_LISP_NOPRO because the slots in
4088 buffer_defaults will all be marked via Vbuffer_defaults. */
4090 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4091 &buffer_defaults
.mode_line_format
,
4092 "Default value of `mode-line-format' for buffers that don't override it.\n\
4093 This is the same as (default-value 'mode-line-format).");
4095 DEFVAR_LISP_NOPRO ("default-header-line-format",
4096 &buffer_defaults
.header_line_format
,
4097 "Default value of `header-line-format' for buffers that don't override it.\n\
4098 This is the same as (default-value 'header-line-format).");
4100 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4101 &buffer_defaults
.abbrev_mode
,
4102 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4103 This is the same as (default-value 'abbrev-mode).");
4105 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4106 &buffer_defaults
.ctl_arrow
,
4107 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4108 This is the same as (default-value 'ctl-arrow).");
4110 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4111 &buffer_defaults
.direction_reversed
,
4112 "Default value of `direction_reversed' for buffers that do not override it.\n\
4113 This is the same as (default-value 'direction-reversed).");
4115 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4116 &buffer_defaults
.enable_multibyte_characters
,
4117 "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4118 This is the same as (default-value 'enable-multibyte-characters).");
4120 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4121 &buffer_defaults
.buffer_file_coding_system
,
4122 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4123 This is the same as (default-value 'buffer-file-coding-system).");
4125 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4126 &buffer_defaults
.truncate_lines
,
4127 "Default value of `truncate-lines' for buffers that do not override it.\n\
4128 This is the same as (default-value 'truncate-lines).");
4130 DEFVAR_LISP_NOPRO ("default-fill-column",
4131 &buffer_defaults
.fill_column
,
4132 "Default value of `fill-column' for buffers that do not override it.\n\
4133 This is the same as (default-value 'fill-column).");
4135 DEFVAR_LISP_NOPRO ("default-left-margin",
4136 &buffer_defaults
.left_margin
,
4137 "Default value of `left-margin' for buffers that do not override it.\n\
4138 This is the same as (default-value 'left-margin).");
4140 DEFVAR_LISP_NOPRO ("default-tab-width",
4141 &buffer_defaults
.tab_width
,
4142 "Default value of `tab-width' for buffers that do not override it.\n\
4143 This is the same as (default-value 'tab-width).");
4145 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4146 &buffer_defaults
.case_fold_search
,
4147 "Default value of `case-fold-search' for buffers that don't override it.\n\
4148 This is the same as (default-value 'case-fold-search).");
4151 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4152 &buffer_defaults
.buffer_file_type
,
4153 "Default file type for buffers that do not override it.\n\
4154 This is the same as (default-value 'buffer-file-type).\n\
4155 The file type is nil for text, t for binary.");
4158 DEFVAR_LISP_NOPRO ("default-left-margin-width",
4159 &buffer_defaults
.left_margin_width
,
4160 "Default value of `left-margin-width' for buffers that don't override it.\n\
4161 This is the same as (default-value 'left-margin-width).");
4163 DEFVAR_LISP_NOPRO ("default-right-margin-width",
4164 &buffer_defaults
.right_margin_width
,
4165 "Default value of `right_margin_width' for buffers that don't override it.\n\
4166 This is the same as (default-value 'right-margin-width).");
4168 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
4169 &buffer_defaults
.indicate_empty_lines
,
4170 "Default value of `indicate-empty-lines' for buffers that don't override it.\n\
4171 This is the same as (default-value 'indicate-empty-lines).");
4173 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
4174 &buffer_defaults
.scroll_up_aggressively
,
4175 "Default value of `scroll-up-aggressively' for buffers that\n\
4176 don't override it. This is the same as (default-value\n\
4177 'scroll-up-aggressively).");
4179 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
4180 &buffer_defaults
.scroll_down_aggressively
,
4181 "Default value of `scroll-down-aggressively' for buffers that\n\
4182 don't override it. This is the same as (default-value\n\
4183 'scroll-down-aggressively).");
4185 DEFVAR_PER_BUFFER ("header-line-format",
4186 ¤t_buffer
->header_line_format
,
4188 "Analogous to `mode-line-format', but for a mode line displayed\n\
4189 at the top of windows.");
4191 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4194 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4195 But make-docfile finds it!
4196 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4198 "Template for displaying mode line for current buffer.\n\
4199 Each buffer has its own value of this variable.\n\
4200 Value may be nil, a string, a symbol or a list or cons cell.\n\
4201 A value of nil means don't display a mode line.\n\
4202 For a symbol, its value is used (but it is ignored if t or nil).\n\
4203 A string appearing directly as the value of a symbol is processed verbatim\n\
4204 in that the %-constructs below are not recognized.\n\
4205 For a list whose car is a symbol, the symbol's value is taken,\n\
4206 and if that is non-nil, the cadr of the list is processed recursively.\n\
4207 Otherwise, the caddr of the list (if there is one) is processed.\n\
4208 For a list whose car is a string or list, each element is processed\n\
4209 recursively and the results are effectively concatenated.\n\
4210 For a list whose car is an integer, the cdr of the list is processed\n\
4211 and padded (if the number is positive) or truncated (if negative)\n\
4212 to the width specified by that number.\n\
4213 A string is printed verbatim in the mode line except for %-constructs:\n\
4214 (%-constructs are allowed when the string is the entire mode-line-format\n\
4215 or when it is found in a cons-cell or a list)\n\
4216 %b -- print buffer name. %f -- print visited file name.\n\
4217 %F -- print frame name.\n\
4218 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4219 % means buffer is read-only and * means it is modified.\n\
4220 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4221 %s -- print process status. %l -- print the current line number.\n\
4222 %c -- print the current column number (this makes editing slower).\n\
4223 To make the column number update correctly in all cases,\n\
4224 `column-number-mode' must be non-nil.\n\
4225 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4226 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4227 or print Bottom or All.\n\
4228 %n -- print Narrow if appropriate.\n\
4229 %t -- print T if file is text, B if binary.\n\
4230 %[ -- print one [ for each recursive editing level. %] similar.\n\
4231 %% -- print %. %- -- print infinitely many dashes.\n\
4232 Decimal digits after the % specify field width to which to pad.");
4235 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4236 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4237 nil here means use current buffer's major mode.");
4239 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4240 make_number (Lisp_Symbol
),
4241 "Symbol for current buffer's major mode.");
4243 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4244 make_number (Lisp_String
),
4245 "Pretty name of current buffer's major mode (a string).");
4247 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4248 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4249 Automatically becomes buffer-local when set in any fashion.");
4251 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4253 "*Non-nil if searches and matches should ignore case.\n\
4254 Automatically becomes buffer-local when set in any fashion.");
4256 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4257 make_number (Lisp_Int
),
4258 "*Column beyond which automatic line-wrapping should happen.\n\
4259 Automatically becomes buffer-local when set in any fashion.");
4261 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4262 make_number (Lisp_Int
),
4263 "*Column for the default indent-line-function to indent to.\n\
4264 Linefeed indents to this column in Fundamental mode.\n\
4265 Automatically becomes buffer-local when set in any fashion.");
4267 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4268 make_number (Lisp_Int
),
4269 "*Distance between tab stops (for display of tab characters), in columns.\n\
4270 Automatically becomes buffer-local when set in any fashion.");
4272 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4273 "*Non-nil means display control chars with uparrow.\n\
4274 A value of nil means use backslash and octal digits.\n\
4275 Automatically becomes buffer-local when set in any fashion.\n\
4276 This variable does not apply to characters whose display is specified\n\
4277 in the current display table (if there is one).");
4279 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4280 ¤t_buffer
->enable_multibyte_characters
,
4282 "Non-nil means the buffer contents are regarded as multi-byte characters.\n\
4283 Otherwise they are regarded as unibyte. This affects the display,\n\
4284 file I/O and the behavior of various editing commands.\n\
4286 This variable is buffer-local but you cannot set it directly;\n\
4287 use the function `set-buffer-multibyte' to change a buffer's representation.\n\
4288 Changing its default value with `setq-default' is supported.\n\
4289 See also variable `default-enable-multibyte-characters' and Info node\n\
4290 `(elisp)Text Representations'.");
4292 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4293 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4294 "Coding system to be used for encoding the buffer contents on saving.\n\
4295 This variable applies to saving the buffer, and also to `write-region'\n\
4296 and other functions that use `write-region'.\n\
4297 It does not apply to sending output to subprocesses, however.\n\
4299 If this is nil, the buffer is saved without any code conversion\n\
4300 unless some coding system is specified in `file-coding-system-alist'\n\
4301 for the buffer file.\n\
4303 The variable `coding-system-for-write', if non-nil, overrides this variable.\n\
4305 This variable is never applied to a way of decoding\n\
4306 a file while reading it.");
4308 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4310 "*Non-nil means lines in the buffer are displayed right to left.");
4312 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4313 "*Non-nil means do not display continuation lines;\n\
4314 give each line of text one screen line.\n\
4315 Automatically becomes buffer-local when set in any fashion.\n\
4317 Note that this is overridden by the variable\n\
4318 `truncate-partial-width-windows' if that variable is non-nil\n\
4319 and this buffer is not full-frame width.");
4322 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4324 "Non-nil if the visited file is a binary file.\n\
4325 This variable is meaningful on MS-DOG and Windows NT.\n\
4326 On those systems, it is automatically local in every buffer.\n\
4327 On other systems, this variable is normally always nil.");
4330 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4331 make_number (Lisp_String
),
4332 "Name of default directory of current buffer. Should end with slash.\n\
4333 Each buffer has its own value of this variable.");
4335 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4337 "Function called (if non-nil) to perform auto-fill.\n\
4338 It is called after self-inserting a space or newline.\n\
4339 Each buffer has its own value of this variable.\n\
4340 NOTE: This variable is not a hook;\n\
4341 its value may not be a list of functions.");
4343 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4344 make_number (Lisp_String
),
4345 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4346 Each buffer has its own value of this variable.");
4348 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4349 make_number (Lisp_String
),
4350 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4351 The truename of a file is calculated by `file-truename'\n\
4352 and then abbreviated with `abbreviate-file-name'.\n\
4353 Each buffer has its own value of this variable.");
4355 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4356 ¤t_buffer
->auto_save_file_name
,
4357 make_number (Lisp_String
),
4358 "Name of file for auto-saving current buffer,\n\
4359 or nil if buffer should not be auto-saved.\n\
4360 Each buffer has its own value of this variable.");
4362 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4363 "Non-nil if this buffer is read-only.\n\
4364 Each buffer has its own value of this variable.");
4366 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4367 "Non-nil if this buffer's file has been backed up.\n\
4368 Backing up is done before the first time the file is saved.\n\
4369 Each buffer has its own value of this variable.");
4371 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4372 make_number (Lisp_Int
),
4373 "Length of current buffer when last read in, saved or auto-saved.\n\
4375 Each buffer has its own value of this variable.");
4377 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4379 "Non-nil enables selective display:\n\
4380 Integer N as value means display only lines\n\
4381 that start with less than n columns of space.\n\
4382 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4383 Then ^M's in the file are written into files as newlines.\n\n\
4384 Automatically becomes buffer-local when set in any fashion.");
4387 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4388 ¤t_buffer
->selective_display_ellipses
,
4390 "t means display ... on previous line when a line is invisible.\n\
4391 Automatically becomes buffer-local when set in any fashion.");
4394 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4395 "Non-nil if self-insertion should replace existing text.\n\
4396 The value should be one of `overwrite-mode-textual',\n\
4397 `overwrite-mode-binary', or nil.\n\
4398 If it is `overwrite-mode-textual', self-insertion still\n\
4399 inserts at the end of a line, and inserts when point is before a tab,\n\
4400 until the tab is filled in.\n\
4401 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4402 Automatically becomes buffer-local when set in any fashion.");
4404 #if 0 /* The doc string is too long for some compilers,
4405 but make-docfile can find it in this comment. */
4406 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4408 "Display table that controls display of the contents of current buffer.\n\
4409 Automatically becomes buffer-local when set in any fashion.\n\
4410 The display table is a char-table created with `make-display-table'.\n\
4411 The ordinary char-table elements control how to display each possible text\n\
4412 character. Each value should be a vector of characters or nil;\n\
4413 nil means display the character in the default fashion.\n\
4414 There are six extra slots to control the display of\n\
4415 the end of a truncated screen line (extra-slot 0, a single character);\n\
4416 the end of a continued line (extra-slot 1, a single character);\n\
4417 the escape character used to display character codes in octal\n\
4418 (extra-slot 2, a single character);\n\
4419 the character used as an arrow for control characters (extra-slot 3,\n\
4420 a single character);\n\
4421 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4422 a vector of characters);\n\
4423 the character used to draw the border between side-by-side windows\n\
4424 (extra-slot 5, a single character).\n\
4425 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4426 If this variable is nil, the value of `standard-display-table' is used.\n\
4427 Each window can have its own, overriding display table.");
4429 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4432 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
4434 "*Width of left marginal area for display of a buffer.\n\
4435 Automatically becomes buffer-local when set in any fashion.\n\
4436 A value of nil means no marginal area.");
4438 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
4440 "*Width of right marginal area for display of a buffer.\n\
4441 Automatically becomes buffer-local when set in any fashion.\n\
4442 A value of nil means no marginal area.");
4444 DEFVAR_PER_BUFFER ("indicate-empty-lines",
4445 ¤t_buffer
->indicate_empty_lines
, Qnil
,
4446 "*Non-nil means visually indicate lines not displaying text.\n\
4447 Automatically becomes buffer-local when set in any fashion.\n");
4449 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
4450 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
4451 "*If a number, scroll display up aggressively.\n\
4452 If scrolling a window because point is above the window start, choose\n\
4453 a new window start so that point ends up that fraction of the window's\n\
4454 height from the bottom of the window.\n\
4455 Automatically becomes buffer-local when set in any fashion.");
4457 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
4458 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
4459 "*If a number, scroll display down aggressively.\n\
4460 If scrolling a window because point is below the window end, choose\n\
4461 a new window start so that point ends up that fraction of the window's\n\
4462 height from the top of the window.\n\
4463 Automatically becomes buffer-local when set in any fashion.");
4465 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4468 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4469 "If non-nil, a function to call before each text change (obsolete).\n\
4470 Two arguments are passed to the function: the positions of\n\
4471 the beginning and end of the range of old text to be changed.\n\
4472 \(For an insertion, the beginning and end are at the same place.)\n\
4473 No information is given about the length of the text after the change.\n\
4475 Buffer changes made while executing the `before-change-function'\n\
4476 don't call any before-change or after-change functions.\n\
4477 That's because these variables are temporarily set to nil.\n\
4478 As a result, a hook function cannot straightforwardly alter the value of\n\
4479 these variables. See the Emacs Lisp manual for a way of\n\
4480 accomplishing an equivalent result by using other variables.\n\n\
4481 This variable is obsolete; use `before-change-functions' instead.");
4482 Vbefore_change_function
= Qnil
;
4484 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4485 "If non-nil, a Function to call after each text change (obsolete).\n\
4486 Three arguments are passed to the function: the positions of\n\
4487 the beginning and end of the range of changed text,\n\
4488 and the length of the pre-change text replaced by that range.\n\
4489 \(For an insertion, the pre-change length is zero;\n\
4490 for a deletion, that length is the number of bytes deleted,\n\
4491 and the post-change beginning and end are at the same place.)\n\
4493 Buffer changes made while executing the `after-change-function'\n\
4494 don't call any before-change or after-change functions.\n\
4495 That's because these variables are temporarily set to nil.\n\
4496 As a result, a hook function cannot straightforwardly alter the value of\n\
4497 these variables. See the Emacs Lisp manual for a way of\n\
4498 accomplishing an equivalent result by using other variables.\n\n\
4499 This variable is obsolete; use `after-change-functions' instead.");
4500 Vafter_change_function
= Qnil
;
4502 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4503 "List of functions to call before each text change.\n\
4504 Two arguments are passed to each function: the positions of\n\
4505 the beginning and end of the range of old text to be changed.\n\
4506 \(For an insertion, the beginning and end are at the same place.)\n\
4507 No information is given about the length of the text after the change.\n\
4509 Buffer changes made while executing the `before-change-functions'\n\
4510 don't call any before-change or after-change functions.\n\
4511 That's because these variables are temporarily set to nil.\n\
4512 As a result, a hook function cannot straightforwardly alter the value of\n\
4513 these variables. See the Emacs Lisp manual for a way of\n\
4514 accomplishing an equivalent result by using other variables.\n\
4516 If an unhandled error happens in running these functions,\n\
4517 the variable's value remains nil. That prevents the error\n\
4518 from happening repeatedly and making Emacs nonfunctional.");
4519 Vbefore_change_functions
= Qnil
;
4521 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4522 "List of function to call after each text change.\n\
4523 Three arguments are passed to each function: the positions of\n\
4524 the beginning and end of the range of changed text,\n\
4525 and the length in bytes of the pre-change text replaced by that range.\n\
4526 \(For an insertion, the pre-change length is zero;\n\
4527 for a deletion, that length is the number of bytes deleted,\n\
4528 and the post-change beginning and end are at the same place.)\n\
4530 Buffer changes made while executing the `after-change-functions'\n\
4531 don't call any before-change or after-change functions.\n\
4532 That's because these variables are temporarily set to nil.\n\
4533 As a result, a hook function cannot straightforwardly alter the value of\n\
4534 these variables. See the Emacs Lisp manual for a way of\n\
4535 accomplishing an equivalent result by using other variables.\n\
4537 If an unhandled error happens in running these functions,\n\
4538 the variable's value remains nil. That prevents the error\n\
4539 from happening repeatedly and making Emacs nonfunctional.");
4540 Vafter_change_functions
= Qnil
;
4542 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4543 "A list of functions to call before changing a buffer which is unmodified.\n\
4544 The functions are run using the `run-hooks' function.");
4545 Vfirst_change_hook
= Qnil
;
4547 #if 0 /* The doc string is too long for some compilers,
4548 but make-docfile can find it in this comment. */
4549 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4550 "List of undo entries in current buffer.\n\
4551 This variable is always local in all buffers.\n\
4552 Recent changes come first; older changes follow newer.\n\
4554 An entry (BEG . END) represents an insertion which begins at\n\
4555 position BEG and ends at position END.\n\
4557 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4558 from (abs POSITION). If POSITION is positive, point was at the front\n\
4559 of the text being deleted; if negative, point was at the end.\n\
4561 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4562 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4563 of the visited file's modification time, as of that time. If the\n\
4564 modification time of the most recent save is different, this entry is\n\
4567 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4568 was modified between BEG and END. PROPERTY is the property name,\n\
4569 and VALUE is the old value.\n\
4571 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4572 was adjusted in position by the offset DISTANCE (an integer).\n\
4574 An entry of the form POSITION indicates that point was at the buffer\n\
4575 location given by the integer. Undoing an entry of this form places\n\
4576 point at POSITION.\n\
4578 nil marks undo boundaries. The undo command treats the changes\n\
4579 between two undo boundaries as a single step to be undone.\n\
4581 If the value of the variable is t, undo information is not recorded.");
4583 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4586 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4587 "Non-nil means the mark and region are currently active in this buffer.\n\
4588 Automatically local in all buffers.");
4590 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4591 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4592 This variable is buffer-local, in all buffers.\n\
4594 Normally, the line-motion functions work by scanning the buffer for\n\
4595 newlines. Columnar operations (like move-to-column and\n\
4596 compute-motion) also work by scanning the buffer, summing character\n\
4597 widths as they go. This works well for ordinary text, but if the\n\
4598 buffer's lines are very long (say, more than 500 characters), these\n\
4599 motion functions will take longer to execute. Emacs may also take\n\
4600 longer to update the display.\n\
4602 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4603 results of their scans, and consult the cache to avoid rescanning\n\
4604 regions of the buffer until the text is modified. The caches are most\n\
4605 beneficial when they prevent the most searching---that is, when the\n\
4606 buffer contains long lines and large regions of characters with the\n\
4607 same, fixed screen width.\n\
4609 When cache-long-line-scans is non-nil, processing short lines will\n\
4610 become slightly slower (because of the overhead of consulting the\n\
4611 cache), and the caches will use memory roughly proportional to the\n\
4612 number of newlines and characters whose screen width varies.\n\
4614 The caches require no explicit maintenance; their accuracy is\n\
4615 maintained internally by the Emacs primitives. Enabling or disabling\n\
4616 the cache should not affect the behavior of any of the motion\n\
4617 functions; it should only affect their performance.");
4619 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4620 "Value of point before the last series of scroll operations, or nil.\n\
4621 This variable is always local in all buffers.");
4623 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4624 "List of formats to use when saving this buffer.\n\
4625 This variable is always local in all buffers.\n\
4626 Formats are defined by `format-alist'. This variable is\n\
4627 set when a file is visited. Automatically local in all buffers.");
4629 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4630 ¤t_buffer
->invisibility_spec
, Qnil
,
4631 "Invisibility spec of this buffer.\n\
4632 This variable is always local in all buffers.\n\
4633 The default is t, which means that text is invisible\n\
4634 if it has a non-nil `invisible' property.\n\
4635 If the value is a list, a text character is invisible if its `invisible'\n\
4636 property is an element in that list.\n\
4637 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4638 then characters with property value PROP are invisible,\n\
4639 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4641 DEFVAR_PER_BUFFER ("buffer-display-count",
4642 ¤t_buffer
->display_count
, Qnil
,
4643 "A number incremented each time this buffer is displayed in a window.\n\
4644 This variable is always local in all buffers.\n\
4645 The function `set-window-buffer increments it.");
4647 DEFVAR_PER_BUFFER ("buffer-display-time",
4648 ¤t_buffer
->display_time
, Qnil
,
4649 "Time stamp updated each time this buffer is displayed in a window.\n\
4650 This variable is always local in all buffers.\n\
4651 The function `set-window-buffer' updates this variable\n\
4652 to the value obtained by calling `current-time'.\n\
4653 If the buffer has never been shown in a window, the value is nil.");
4655 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4656 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4657 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4658 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4659 all windows or just the selected window.");
4660 Vtransient_mark_mode
= Qnil
;
4662 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4663 "*Non-nil means disregard read-only status of buffers or characters.\n\
4664 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4665 text properties. If the value is a list, disregard `buffer-read-only'\n\
4666 and disregard a `read-only' text property if the property value\n\
4667 is a member of the list.");
4668 Vinhibit_read_only
= Qnil
;
4670 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4671 "List of functions called with no args to query before killing a buffer.");
4672 Vkill_buffer_query_functions
= Qnil
;
4674 defsubr (&Sbuffer_live_p
);
4675 defsubr (&Sbuffer_list
);
4676 defsubr (&Sget_buffer
);
4677 defsubr (&Sget_file_buffer
);
4678 defsubr (&Sget_buffer_create
);
4679 defsubr (&Smake_indirect_buffer
);
4680 defsubr (&Sgenerate_new_buffer_name
);
4681 defsubr (&Sbuffer_name
);
4682 /*defsubr (&Sbuffer_number);*/
4683 defsubr (&Sbuffer_file_name
);
4684 defsubr (&Sbuffer_base_buffer
);
4685 defsubr (&Sbuffer_local_variables
);
4686 defsubr (&Sbuffer_modified_p
);
4687 defsubr (&Sset_buffer_modified_p
);
4688 defsubr (&Sbuffer_modified_tick
);
4689 defsubr (&Srename_buffer
);
4690 defsubr (&Sother_buffer
);
4691 defsubr (&Sbuffer_disable_undo
);
4692 defsubr (&Sbuffer_enable_undo
);
4693 defsubr (&Skill_buffer
);
4694 defsubr (&Sset_buffer_major_mode
);
4695 defsubr (&Sswitch_to_buffer
);
4696 defsubr (&Spop_to_buffer
);
4697 defsubr (&Scurrent_buffer
);
4698 defsubr (&Sset_buffer
);
4699 defsubr (&Sbarf_if_buffer_read_only
);
4700 defsubr (&Sbury_buffer
);
4701 defsubr (&Serase_buffer
);
4702 defsubr (&Sset_buffer_multibyte
);
4703 defsubr (&Skill_all_local_variables
);
4705 defsubr (&Soverlayp
);
4706 defsubr (&Smake_overlay
);
4707 defsubr (&Sdelete_overlay
);
4708 defsubr (&Smove_overlay
);
4709 defsubr (&Soverlay_start
);
4710 defsubr (&Soverlay_end
);
4711 defsubr (&Soverlay_buffer
);
4712 defsubr (&Soverlay_properties
);
4713 defsubr (&Soverlays_at
);
4714 defsubr (&Soverlays_in
);
4715 defsubr (&Snext_overlay_change
);
4716 defsubr (&Sprevious_overlay_change
);
4717 defsubr (&Soverlay_recenter
);
4718 defsubr (&Soverlay_lists
);
4719 defsubr (&Soverlay_get
);
4720 defsubr (&Soverlay_put
);
4726 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4727 initial_define_key (control_x_map
, 'k', "kill-buffer");
4729 /* This must not be in syms_of_buffer, because Qdisabled is not
4730 initialized when that function gets called. */
4731 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);