1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
25 #include <sys/param.h>
31 /* in 4.1, param.h fails to define this. */
32 #define MAXPATHLEN 1024
33 #endif /* not MAXPATHLEN */
43 #include "intervals.h"
48 #include "region-cache.h"
50 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 struct buffer buffer_defaults
;
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the bit for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_var_flags slot.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure is negative, then even though there may
90 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
91 and the corresponding slot in buffer_defaults is not used.
93 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
94 zero, that is a bug */
96 struct buffer buffer_local_flags
;
98 /* This structure holds the names of symbols whose values may be
99 buffer-local. It is indexed and accessed in the same way as the above. */
101 struct buffer buffer_local_symbols
;
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static int buffer_permanent_local_flags
;
120 Lisp_Object
Fset_buffer ();
121 void set_buffer_internal ();
122 void set_buffer_internal_1 ();
123 static void call_overlay_mod_hooks ();
124 static void swap_out_buffer_local_variables ();
125 static void reset_buffer_local_variables ();
127 /* Alist of all buffer names vs the buffers. */
128 /* This used to be a variable, but is no longer,
129 to prevent lossage due to user rplac'ing this alist or its elements. */
130 Lisp_Object Vbuffer_alist
;
132 /* Functions to call before and after each text change. */
133 Lisp_Object Vbefore_change_function
;
134 Lisp_Object Vafter_change_function
;
135 Lisp_Object Vbefore_change_functions
;
136 Lisp_Object Vafter_change_functions
;
138 Lisp_Object Vtransient_mark_mode
;
140 /* t means ignore all read-only text properties.
141 A list means ignore such a property if its value is a member of the list.
142 Any non-nil value means ignore buffer-read-only. */
143 Lisp_Object Vinhibit_read_only
;
145 /* List of functions to call that can query about killing a buffer.
146 If any of these functions returns nil, we don't kill it. */
147 Lisp_Object Vkill_buffer_query_functions
;
149 /* List of functions to call before changing an unmodified buffer. */
150 Lisp_Object Vfirst_change_hook
;
152 Lisp_Object Qfirst_change_hook
;
153 Lisp_Object Qbefore_change_functions
;
154 Lisp_Object Qafter_change_functions
;
156 /* If nonzero, all modification hooks are suppressed. */
157 int inhibit_modification_hooks
;
159 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
161 Lisp_Object Qprotected_field
;
163 Lisp_Object QSFundamental
; /* A string "Fundamental" */
165 Lisp_Object Qkill_buffer_hook
;
167 Lisp_Object Qget_file_buffer
;
169 Lisp_Object Qoverlayp
;
171 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
173 Lisp_Object Qmodification_hooks
;
174 Lisp_Object Qinsert_in_front_hooks
;
175 Lisp_Object Qinsert_behind_hooks
;
177 /* For debugging; temporary. See set_buffer_internal. */
178 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
185 error ("No buffer named %s", XSTRING (spec
)->data
);
186 error ("Invalid buffer argument");
189 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
190 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
191 Value is nil if OBJECT is not a buffer or if it has been killed.")
195 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
199 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
200 "Return a list of all existing live buffers.\n\
201 If the optional arg FRAME is a frame, we return that frame's buffer list.")
205 Lisp_Object framelist
, general
;
206 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
212 CHECK_FRAME (frame
, 1);
214 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
216 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
218 while (! NILP (tail
))
220 general
= Fdelq (XCONS (tail
)->car
, general
);
221 tail
= XCONS (tail
)->cdr
;
223 return nconc2 (framelist
, general
);
229 /* Like Fassoc, but use Fstring_equal to compare
230 (which ignores text properties),
231 and don't ever QUIT. */
234 assoc_ignore_text_properties (key
, list
)
235 register Lisp_Object key
;
238 register Lisp_Object tail
;
239 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
241 register Lisp_Object elt
, tem
;
243 tem
= Fstring_equal (Fcar (elt
), key
);
250 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
251 "Return the buffer named NAME (a string).\n\
252 If there is no live buffer named NAME, return nil.\n\
253 NAME may also be a buffer; if so, the value is that buffer.")
255 register Lisp_Object name
;
259 CHECK_STRING (name
, 0);
261 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
264 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
265 "Return the buffer visiting file FILENAME (a string).\n\
266 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
267 If there is no such live buffer, return nil.\n\
268 See also `find-buffer-visiting'.")
270 register Lisp_Object filename
;
272 register Lisp_Object tail
, buf
, tem
;
275 CHECK_STRING (filename
, 0);
276 filename
= Fexpand_file_name (filename
, Qnil
);
278 /* If the file name has special constructs in it,
279 call the corresponding file handler. */
280 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
282 return call2 (handler
, Qget_file_buffer
, filename
);
284 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
286 buf
= Fcdr (XCONS (tail
)->car
);
287 if (!BUFFERP (buf
)) continue;
288 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
289 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
297 get_truename_buffer (filename
)
298 register Lisp_Object filename
;
300 register Lisp_Object tail
, buf
, tem
;
302 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
304 buf
= Fcdr (XCONS (tail
)->car
);
305 if (!BUFFERP (buf
)) continue;
306 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
307 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
314 /* Incremented for each buffer created, to assign the buffer number. */
317 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
318 "Return the buffer named NAME, or create such a buffer and return it.\n\
319 A new buffer is created if there is no live buffer named NAME.\n\
320 If NAME starts with a space, the new buffer does not keep undo information.\n\
321 If NAME is a buffer instead of a string, then it is the value returned.\n\
322 The value is never nil.")
324 register Lisp_Object name
;
326 register Lisp_Object buf
;
327 register struct buffer
*b
;
329 buf
= Fget_buffer (name
);
333 if (XSTRING (name
)->size
== 0)
334 error ("Empty string for buffer name is not allowed");
336 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
338 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
340 /* An ordinary buffer uses its own struct buffer_text. */
341 b
->text
= &b
->own_text
;
344 BUF_GAP_SIZE (b
) = 20;
346 /* We allocate extra 1-byte at the tail and keep it always '\0' for
347 anchoring a search. */
348 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
350 if (! BUF_BEG_ADDR (b
))
351 buffer_memory_full ();
359 BUF_GPT_BYTE (b
) = 1;
360 BUF_BEGV_BYTE (b
) = 1;
364 BUF_OVERLAY_MODIFF (b
) = 1;
365 BUF_SAVE_MODIFF (b
) = 1;
366 BUF_INTERVALS (b
) = 0;
367 BUF_UNCHANGED_MODIFIED (b
) = 1;
368 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
369 BUF_END_UNCHANGED (b
) = 0;
370 BUF_BEG_UNCHANGED (b
) = 0;
371 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
373 b
->newline_cache
= 0;
374 b
->width_run_cache
= 0;
375 b
->width_table
= Qnil
;
376 b
->minibuffer_prompt_length
= Qnil
;
377 b
->prevent_redisplay_optimizations_p
= 1;
379 /* Put this on the chain of all buffers including killed ones. */
380 b
->next
= all_buffers
;
383 /* An ordinary buffer normally doesn't need markers
384 to handle BEGV and ZV. */
386 b
->begv_marker
= Qnil
;
389 name
= Fcopy_sequence (name
);
390 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
393 if (XSTRING (name
)->data
[0] != ' ')
399 reset_buffer_local_variables (b
, 1);
401 /* Put this in the alist of all live buffers. */
403 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
405 b
->mark
= Fmake_marker ();
406 BUF_MARKERS (b
) = Qnil
;
411 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
, 2, 2,
412 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
413 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
414 BASE-BUFFER should be an existing buffer (or buffer name).\n\
415 NAME should be a string which is not the name of an existing buffer.")
417 register Lisp_Object base_buffer
, name
;
419 register Lisp_Object buf
;
420 register struct buffer
*b
;
422 buf
= Fget_buffer (name
);
424 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
426 base_buffer
= Fget_buffer (base_buffer
);
427 if (NILP (base_buffer
))
428 error ("No such buffer: `%s'",
429 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
431 if (XSTRING (name
)->size
== 0)
432 error ("Empty string for buffer name is not allowed");
434 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
436 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
438 if (XBUFFER (base_buffer
)->base_buffer
)
439 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
441 b
->base_buffer
= XBUFFER (base_buffer
);
443 /* Use the base buffer's text object. */
444 b
->text
= b
->base_buffer
->text
;
446 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
447 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
448 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
449 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
450 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
451 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
453 b
->newline_cache
= 0;
454 b
->width_run_cache
= 0;
455 b
->width_table
= Qnil
;
456 b
->minibuffer_prompt_length
= Qnil
;
458 /* Put this on the chain of all buffers including killed ones. */
459 b
->next
= all_buffers
;
462 name
= Fcopy_sequence (name
);
463 INITIALIZE_INTERVAL (XSTRING (name
), NULL_INTERVAL
);
467 reset_buffer_local_variables (b
, 1);
469 /* Put this in the alist of all live buffers. */
471 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
473 b
->mark
= Fmake_marker ();
476 /* The multibyte status belongs to the base buffer. */
477 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
479 /* Make sure the base buffer has markers for its narrowing. */
480 if (NILP (b
->base_buffer
->pt_marker
))
482 b
->base_buffer
->pt_marker
= Fmake_marker ();
483 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
484 BUF_PT (b
->base_buffer
),
485 BUF_PT_BYTE (b
->base_buffer
));
487 if (NILP (b
->base_buffer
->begv_marker
))
489 b
->base_buffer
->begv_marker
= Fmake_marker ();
490 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
491 BUF_BEGV (b
->base_buffer
),
492 BUF_BEGV_BYTE (b
->base_buffer
));
494 if (NILP (b
->base_buffer
->zv_marker
))
496 b
->base_buffer
->zv_marker
= Fmake_marker ();
497 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
498 BUF_ZV (b
->base_buffer
),
499 BUF_ZV_BYTE (b
->base_buffer
));
500 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
503 /* Give the indirect buffer markers for its narrowing. */
504 b
->pt_marker
= Fmake_marker ();
505 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
506 b
->begv_marker
= Fmake_marker ();
507 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
508 b
->zv_marker
= Fmake_marker ();
509 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
510 XMARKER (b
->zv_marker
)->insertion_type
= 1;
515 /* Reinitialize everything about a buffer except its name and contents
516 and local variables. */
520 register struct buffer
*b
;
523 b
->file_truename
= Qnil
;
524 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
526 XSETFASTINT (b
->save_length
, 0);
527 b
->last_window_start
= 1;
528 /* It is more conservative to start out "changed" than "unchanged". */
530 b
->prevent_redisplay_optimizations_p
= 1;
532 b
->auto_save_modified
= 0;
533 b
->auto_save_failure_time
= -1;
534 b
->auto_save_file_name
= Qnil
;
536 b
->overlays_before
= Qnil
;
537 b
->overlays_after
= Qnil
;
538 XSETFASTINT (b
->overlay_center
, 1);
539 b
->mark_active
= Qnil
;
540 b
->point_before_scroll
= Qnil
;
541 b
->file_format
= Qnil
;
542 b
->last_selected_window
= Qnil
;
543 XSETINT (b
->display_count
, 0);
544 b
->display_time
= Qnil
;
547 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
550 /* Reset buffer B's local variables info.
551 Don't use this on a buffer that has already been in use;
552 it does not treat permanent locals consistently.
553 Instead, use Fkill_all_local_variables.
555 If PERMANENT_TOO is 1, then we reset permanent built-in
556 buffer-local variables. If PERMANENT_TOO is 0,
557 we preserve those. */
560 reset_buffer_local_variables (b
, permanent_too
)
561 register struct buffer
*b
;
567 /* Decide which built-in local variables to reset. */
571 dont_reset
= buffer_permanent_local_flags
;
573 /* Reset the major mode to Fundamental, together with all the
574 things that depend on the major mode.
575 default-major-mode is handled at a higher level.
576 We ignore it here. */
577 b
->major_mode
= Qfundamental_mode
;
579 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
580 b
->mode_name
= QSFundamental
;
581 b
->minor_modes
= Qnil
;
583 /* If the standard case table has been altered and invalidated,
584 fix up its insides first. */
585 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
586 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
587 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
588 Fset_standard_case_table (Vascii_downcase_table
);
590 b
->downcase_table
= Vascii_downcase_table
;
591 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
592 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
593 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
594 b
->invisibility_spec
= Qt
;
596 b
->buffer_file_type
= Qnil
;
600 b
->sort_table
= XSTRING (Vascii_sort_table
);
601 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
604 /* Reset all (or most) per-buffer variables to their defaults. */
605 b
->local_var_alist
= Qnil
;
606 b
->local_var_flags
&= dont_reset
;
608 /* For each slot that has a default value,
609 copy that into the slot. */
611 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
612 offset
< sizeof (struct buffer
);
613 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
615 int flag
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
617 /* Don't reset a permanent local. */
618 && ! (dont_reset
& flag
))
620 *(Lisp_Object
*)(offset
+ (char *)b
)
621 = *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
625 /* We split this away from generate-new-buffer, because rename-buffer
626 and set-visited-file-name ought to be able to use this to really
627 rename the buffer properly. */
629 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
631 "Return a string that is the name of no existing buffer based on NAME.\n\
632 If there is no live buffer named NAME, then return NAME.\n\
633 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
634 until an unused name is found, and then return that name.\n\
635 Optional second argument IGNORE specifies a name that is okay to use\n\
636 \(if it is in the sequence to be tried)\n\
637 even if a buffer with that name exists.")
639 register Lisp_Object name
, ignore
;
641 register Lisp_Object gentemp
, tem
;
645 CHECK_STRING (name
, 0);
647 tem
= Fget_buffer (name
);
654 sprintf (number
, "<%d>", ++count
);
655 gentemp
= concat2 (name
, build_string (number
));
656 tem
= Fstring_equal (gentemp
, ignore
);
659 tem
= Fget_buffer (gentemp
);
666 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
667 "Return the name of BUFFER, as a string.\n\
668 With no argument or nil as argument, return the name of the current buffer.")
670 register Lisp_Object buffer
;
673 return current_buffer
->name
;
674 CHECK_BUFFER (buffer
, 0);
675 return XBUFFER (buffer
)->name
;
678 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
679 "Return name of file BUFFER is visiting, or nil if none.\n\
680 No argument or nil as argument means use the current buffer.")
682 register Lisp_Object buffer
;
685 return current_buffer
->filename
;
686 CHECK_BUFFER (buffer
, 0);
687 return XBUFFER (buffer
)->filename
;
690 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
692 "Return the base buffer of indirect buffer BUFFER.\n\
693 If BUFFER is not indirect, return nil.")
695 register Lisp_Object buffer
;
698 Lisp_Object base_buffer
;
701 base
= current_buffer
->base_buffer
;
704 CHECK_BUFFER (buffer
, 0);
705 base
= XBUFFER (buffer
)->base_buffer
;
710 XSETBUFFER (base_buffer
, base
);
714 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
715 Sbuffer_local_variables
, 0, 1, 0,
716 "Return an alist of variables that are buffer-local in BUFFER.\n\
717 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
718 For a symbol that is locally unbound, just the symbol appears in the value.\n\
719 Note that storing new VALUEs in these elements doesn't change the variables.\n\
720 No argument or nil as argument means use current buffer as BUFFER.")
722 register Lisp_Object buffer
;
724 register struct buffer
*buf
;
725 register Lisp_Object result
;
728 buf
= current_buffer
;
731 CHECK_BUFFER (buffer
, 0);
732 buf
= XBUFFER (buffer
);
738 register Lisp_Object tail
;
739 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
741 Lisp_Object val
, elt
;
743 elt
= XCONS (tail
)->car
;
745 /* Reference each variable in the alist in buf.
746 If inquiring about the current buffer, this gets the current values,
747 so store them into the alist so the alist is up to date.
748 If inquiring about some other buffer, this swaps out any values
749 for that buffer, making the alist up to date automatically. */
750 val
= find_symbol_value (XCONS (elt
)->car
);
751 /* Use the current buffer value only if buf is the current buffer. */
752 if (buf
!= current_buffer
)
753 val
= XCONS (elt
)->cdr
;
755 /* If symbol is unbound, put just the symbol in the list. */
756 if (EQ (val
, Qunbound
))
757 result
= Fcons (XCONS (elt
)->car
, result
);
758 /* Otherwise, put (symbol . value) in the list. */
760 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
764 /* Add on all the variables stored in special slots. */
766 register int offset
, mask
;
768 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
769 offset
< sizeof (struct buffer
);
770 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
772 mask
= XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_flags
));
773 if (mask
== -1 || (buf
->local_var_flags
& mask
))
774 if (SYMBOLP (*(Lisp_Object
*)(offset
775 + (char *)&buffer_local_symbols
)))
776 result
= Fcons (Fcons (*((Lisp_Object
*)
777 (offset
+ (char *)&buffer_local_symbols
)),
778 *(Lisp_Object
*)(offset
+ (char *)buf
)),
787 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
789 "Return t if BUFFER was modified since its file was last read or saved.\n\
790 No argument or nil as argument means use current buffer as BUFFER.")
792 register Lisp_Object buffer
;
794 register struct buffer
*buf
;
796 buf
= current_buffer
;
799 CHECK_BUFFER (buffer
, 0);
800 buf
= XBUFFER (buffer
);
803 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
806 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
808 "Mark current buffer as modified or unmodified according to FLAG.\n\
809 A non-nil FLAG means mark the buffer modified.")
811 register Lisp_Object flag
;
813 register int already
;
814 register Lisp_Object fn
;
816 #ifdef CLASH_DETECTION
817 /* If buffer becoming modified, lock the file.
818 If buffer becoming unmodified, unlock the file. */
820 fn
= current_buffer
->file_truename
;
821 /* Test buffer-file-name so that binding it to nil is effective. */
822 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
824 already
= SAVE_MODIFF
< MODIFF
;
825 if (!already
&& !NILP (flag
))
827 else if (already
&& NILP (flag
))
830 #endif /* CLASH_DETECTION */
832 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
837 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
839 "Return BUFFER's tick counter, incremented for each change in text.\n\
840 Each buffer has a tick counter which is incremented each time the text in\n\
841 that buffer is changed. It wraps around occasionally.\n\
842 No argument or nil as argument means use current buffer as BUFFER.")
844 register Lisp_Object buffer
;
846 register struct buffer
*buf
;
848 buf
= current_buffer
;
851 CHECK_BUFFER (buffer
, 0);
852 buf
= XBUFFER (buffer
);
855 return make_number (BUF_MODIFF (buf
));
858 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
859 "sRename buffer (to new name): \nP",
860 "Change current buffer's name to NEWNAME (a string).\n\
861 If second arg UNIQUE is nil or omitted, it is an error if a\n\
862 buffer named NEWNAME already exists.\n\
863 If UNIQUE is non-nil, come up with a new name using\n\
864 `generate-new-buffer-name'.\n\
865 Interactively, you can set UNIQUE with a prefix argument.\n\
866 We return the name we actually gave the buffer.\n\
867 This does not change the name of the visited file (if any).")
869 register Lisp_Object newname
, unique
;
871 register Lisp_Object tem
, buf
;
873 CHECK_STRING (newname
, 0);
875 if (XSTRING (newname
)->size
== 0)
876 error ("Empty string is invalid as a buffer name");
878 tem
= Fget_buffer (newname
);
879 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
880 the buffer automatically so you can create another with the original name.
881 It makes UNIQUE equivalent to
882 (rename-buffer (generate-new-buffer-name NEWNAME)). */
883 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
884 return current_buffer
->name
;
888 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
890 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
893 current_buffer
->name
= newname
;
895 /* Catch redisplay's attention. Unless we do this, the mode lines for
896 any windows displaying current_buffer will stay unchanged. */
899 XSETBUFFER (buf
, current_buffer
);
900 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
901 if (NILP (current_buffer
->filename
)
902 && !NILP (current_buffer
->auto_save_file_name
))
903 call0 (intern ("rename-auto-save-file"));
904 /* Refetch since that last call may have done GC. */
905 return current_buffer
->name
;
908 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
909 "Return most recently selected buffer other than BUFFER.\n\
910 Buffers not visible in windows are preferred to visible buffers,\n\
911 unless optional second argument VISIBLE-OK is non-nil.\n\
912 If the optional third argument FRAME is non-nil, use that frame's\n\
913 buffer list instead of the selected frame's buffer list.\n\
914 If no other buffer exists, the buffer `*scratch*' is returned.\n\
915 If BUFFER is omitted or nil, some interesting buffer is returned.")
916 (buffer
, visible_ok
, frame
)
917 register Lisp_Object buffer
, visible_ok
, frame
;
919 Lisp_Object
Fset_buffer_major_mode ();
920 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
924 frame
= Fselected_frame ();
926 tail
= Vbuffer_alist
;
927 pred
= frame_buffer_predicate (frame
);
929 /* Consider buffers that have been seen in the selected frame
930 before other buffers. */
932 tem
= frame_buffer_list (frame
);
936 if (BUFFERP (XCONS (tem
)->car
))
937 add_ons
= Fcons (Fcons (Qnil
, XCONS (tem
)->car
), add_ons
);
938 tem
= XCONS (tem
)->cdr
;
940 tail
= nconc2 (Fnreverse (add_ons
), tail
);
942 for (; !NILP (tail
); tail
= Fcdr (tail
))
944 buf
= Fcdr (Fcar (tail
));
945 if (EQ (buf
, buffer
))
947 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
949 /* If the selected frame has a buffer_predicate,
950 disregard buffers that don't fit the predicate. */
953 tem
= call1 (pred
, buf
);
958 if (NILP (visible_ok
))
959 tem
= Fget_buffer_window (buf
, Qt
);
964 if (NILP (notsogood
))
967 if (!NILP (notsogood
))
969 buf
= Fget_buffer_create (build_string ("*scratch*"));
970 Fset_buffer_major_mode (buf
);
974 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
976 "Make BUFFER stop keeping undo information.\n\
977 No argument or nil as argument means do this for the current buffer.")
979 register Lisp_Object buffer
;
981 Lisp_Object real_buffer
;
984 XSETBUFFER (real_buffer
, current_buffer
);
987 real_buffer
= Fget_buffer (buffer
);
988 if (NILP (real_buffer
))
992 XBUFFER (real_buffer
)->undo_list
= Qt
;
997 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
999 "Start keeping undo information for buffer BUFFER.\n\
1000 No argument or nil as argument means do this for the current buffer.")
1002 register Lisp_Object buffer
;
1004 Lisp_Object real_buffer
;
1007 XSETBUFFER (real_buffer
, current_buffer
);
1010 real_buffer
= Fget_buffer (buffer
);
1011 if (NILP (real_buffer
))
1015 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1016 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1022 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1023 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1024 The buffer being killed will be current while the hook is running.\n\
1027 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1028 "Kill the buffer BUFFER.\n\
1029 The argument may be a buffer or may be the name of a buffer.\n\
1030 An argument of nil means kill the current buffer.\n\n\
1031 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1032 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1033 if not void, is a list of functions to be called, with no arguments,\n\
1034 before the buffer is actually killed. The buffer to be killed is current\n\
1035 when the hook functions are called.\n\n\
1036 Any processes that have this buffer as the `process-buffer' are killed\n\
1042 register struct buffer
*b
;
1043 register Lisp_Object tem
;
1044 register struct Lisp_Marker
*m
;
1045 struct gcpro gcpro1
, gcpro2
;
1048 buf
= Fcurrent_buffer ();
1050 buf
= Fget_buffer (buffer
);
1056 /* Avoid trouble for buffer already dead. */
1060 /* Query if the buffer is still modified. */
1061 if (INTERACTIVE
&& !NILP (b
->filename
)
1062 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1065 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1066 XSTRING (b
->name
)->data
));
1072 /* Run hooks with the buffer to be killed the current buffer. */
1074 register Lisp_Object val
;
1075 int count
= specpdl_ptr
- specpdl
;
1078 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1079 set_buffer_internal (b
);
1081 /* First run the query functions; if any query is answered no,
1082 don't kill the buffer. */
1083 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1085 tem
= call0 (Fcar (list
));
1087 return unbind_to (count
, Qnil
);
1090 /* Then run the hooks. */
1091 if (!NILP (Vrun_hooks
))
1092 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1093 unbind_to (count
, Qnil
);
1096 /* We have no more questions to ask. Verify that it is valid
1097 to kill the buffer. This must be done after the questions
1098 since anything can happen within do_yes_or_no_p. */
1100 /* Don't kill the minibuffer now current. */
1101 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1107 /* When we kill a base buffer, kill all its indirect buffers.
1108 We do it at this stage so nothing terrible happens if they
1109 ask questions or their hooks get errors. */
1110 if (! b
->base_buffer
)
1112 struct buffer
*other
;
1116 for (other
= all_buffers
; other
; other
= other
->next
)
1117 /* all_buffers contains dead buffers too;
1118 don't re-kill them. */
1119 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1122 XSETBUFFER (buf
, other
);
1129 /* Make this buffer not be current.
1130 In the process, notice if this is the sole visible buffer
1131 and give up if so. */
1132 if (b
== current_buffer
)
1134 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1136 if (b
== current_buffer
)
1140 /* Now there is no question: we can kill the buffer. */
1142 #ifdef CLASH_DETECTION
1143 /* Unlock this buffer's file, if it is locked. */
1145 #endif /* CLASH_DETECTION */
1147 kill_buffer_processes (buf
);
1149 tem
= Vinhibit_quit
;
1151 replace_buffer_in_all_windows (buf
);
1152 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1153 frames_discard_buffer (buf
);
1154 Vinhibit_quit
= tem
;
1156 /* Delete any auto-save file, if we saved it in this session. */
1157 if (STRINGP (b
->auto_save_file_name
)
1158 && b
->auto_save_modified
!= 0
1159 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1162 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1164 internal_delete_file (b
->auto_save_file_name
);
1169 /* Unchain all markers that belong to this indirect buffer.
1170 Don't unchain the markers that belong to the base buffer
1171 or its other indirect buffers. */
1172 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1178 unchain_marker (tem
);
1184 /* Unchain all markers of this buffer and its indirect buffers.
1185 and leave them pointing nowhere. */
1186 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1193 BUF_MARKERS (b
) = Qnil
;
1195 #ifdef USE_TEXT_PROPERTIES
1196 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1199 /* Perhaps we should explicitly free the interval tree here... */
1202 /* Reset the local variables, so that this buffer's local values
1203 won't be protected from GC. They would be protected
1204 if they happened to remain encached in their symbols.
1205 This gets rid of them for certain. */
1206 swap_out_buffer_local_variables (b
);
1207 reset_buffer_local_variables (b
, 1);
1212 if (! b
->base_buffer
)
1213 BUFFER_FREE (BUF_BEG_ADDR (b
));
1215 if (b
->newline_cache
)
1217 free_region_cache (b
->newline_cache
);
1218 b
->newline_cache
= 0;
1220 if (b
->width_run_cache
)
1222 free_region_cache (b
->width_run_cache
);
1223 b
->width_run_cache
= 0;
1225 b
->width_table
= Qnil
;
1226 b
->minibuffer_prompt_length
= Qnil
;
1228 b
->undo_list
= Qnil
;
1233 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1234 we do this each time BUF is selected visibly, the more recently
1235 selected buffers are always closer to the front of the list. This
1236 means that other_buffer is more likely to choose a relevant buffer. */
1242 register Lisp_Object link
, prev
;
1244 frame
= Fselected_frame ();
1247 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
1249 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
1254 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1255 we cannot use Fdelq itself here because it allows quitting. */
1258 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
1260 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1262 XCONS (link
)->cdr
= Vbuffer_alist
;
1263 Vbuffer_alist
= link
;
1265 /* Now move this buffer to the front of frame_buffer_list also. */
1268 for (link
= frame_buffer_list (frame
); CONSP (link
);
1269 link
= XCONS (link
)->cdr
)
1271 if (EQ (XCONS (link
)->car
, buf
))
1276 /* Effectively do delq. */
1281 set_frame_buffer_list (frame
,
1282 XCONS (frame_buffer_list (frame
))->cdr
);
1284 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
1286 XCONS (link
)->cdr
= frame_buffer_list (frame
);
1287 set_frame_buffer_list (frame
, link
);
1290 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1293 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1294 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1295 Use this function before selecting the buffer, since it may need to inspect\n\
1296 the current buffer's major mode.")
1301 Lisp_Object function
;
1303 function
= buffer_defaults
.major_mode
;
1304 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1305 function
= current_buffer
->major_mode
;
1307 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1310 count
= specpdl_ptr
- specpdl
;
1312 /* To select a nonfundamental mode,
1313 select the buffer temporarily and then call the mode function. */
1315 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1317 Fset_buffer (buffer
);
1320 return unbind_to (count
, Qnil
);
1323 /* If switching buffers in WINDOW would be an error, return
1324 a C string saying what the error would be. */
1327 no_switch_window (window
)
1331 if (EQ (minibuf_window
, window
))
1332 return "Cannot switch buffers in minibuffer window";
1333 tem
= Fwindow_dedicated_p (window
);
1335 return "Cannot switch buffers in a dedicated window";
1339 /* Switch to buffer BUFFER in the selected window.
1340 If NORECORD is non-nil, don't call record_buffer. */
1343 switch_to_buffer_1 (buffer
, norecord
)
1344 Lisp_Object buffer
, norecord
;
1346 register Lisp_Object buf
;
1349 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1352 buf
= Fget_buffer (buffer
);
1355 buf
= Fget_buffer_create (buffer
);
1356 Fset_buffer_major_mode (buf
);
1360 if (NILP (norecord
))
1361 record_buffer (buf
);
1363 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1364 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1371 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1372 "Select buffer BUFFER in the current window.\n\
1373 BUFFER may be a buffer or a buffer name.\n\
1374 Optional second arg NORECORD non-nil means\n\
1375 do not put this buffer at the front of the list of recently selected ones.\n\
1377 WARNING: This is NOT the way to work on another buffer temporarily\n\
1378 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1379 the window-buffer correspondences.")
1381 Lisp_Object buffer
, norecord
;
1385 err
= no_switch_window (selected_window
);
1386 if (err
) error (err
);
1388 return switch_to_buffer_1 (buffer
, norecord
);
1391 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1392 "Select buffer BUFFER in some window, preferably a different one.\n\
1393 If BUFFER is nil, then some other buffer is chosen.\n\
1394 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1395 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1396 window even if BUFFER is already visible in the selected window.\n\
1397 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1398 of `display-buffer' for additional customization information.\n\
1400 Optional third arg NORECORD non-nil means\n\
1401 do not put this buffer at the front of the list of recently selected ones.")
1402 (buffer
, other_window
, norecord
)
1403 Lisp_Object buffer
, other_window
, norecord
;
1405 register Lisp_Object buf
;
1407 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1410 buf
= Fget_buffer (buffer
);
1413 buf
= Fget_buffer_create (buffer
);
1414 Fset_buffer_major_mode (buf
);
1418 if (NILP (norecord
))
1419 record_buffer (buf
);
1420 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1424 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1425 "Return the current buffer as a Lisp object.")
1428 register Lisp_Object buf
;
1429 XSETBUFFER (buf
, current_buffer
);
1433 /* Set the current buffer to B.
1435 We previously set windows_or_buffers_changed here to invalidate
1436 global unchanged information in beg_unchanged and end_unchanged.
1437 This is no longer necessary because we now compute unchanged
1438 information on a buffer-basis. Every action affecting other
1439 windows than the selected one requires a select_window at some
1440 time, and that increments windows_or_buffers_changed. */
1443 set_buffer_internal (b
)
1444 register struct buffer
*b
;
1446 if (current_buffer
!= b
)
1447 set_buffer_internal_1 (b
);
1450 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1451 This is used by redisplay. */
1454 set_buffer_internal_1 (b
)
1455 register struct buffer
*b
;
1457 register struct buffer
*old_buf
;
1458 register Lisp_Object tail
, valcontents
;
1461 if (current_buffer
== b
)
1464 old_buf
= current_buffer
;
1466 last_known_column_point
= -1; /* invalidate indentation cache */
1470 /* Put the undo list back in the base buffer, so that it appears
1471 that an indirect buffer shares the undo list of its base. */
1472 if (old_buf
->base_buffer
)
1473 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1475 /* If the old current buffer has markers to record PT, BEGV and ZV
1476 when it is not current, update them now. */
1477 if (! NILP (old_buf
->pt_marker
))
1480 XSETBUFFER (obuf
, old_buf
);
1481 set_marker_both (old_buf
->pt_marker
, obuf
,
1482 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1484 if (! NILP (old_buf
->begv_marker
))
1487 XSETBUFFER (obuf
, old_buf
);
1488 set_marker_both (old_buf
->begv_marker
, obuf
,
1489 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1491 if (! NILP (old_buf
->zv_marker
))
1494 XSETBUFFER (obuf
, old_buf
);
1495 set_marker_both (old_buf
->zv_marker
, obuf
,
1496 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1500 /* Get the undo list from the base buffer, so that it appears
1501 that an indirect buffer shares the undo list of its base. */
1503 b
->undo_list
= b
->base_buffer
->undo_list
;
1505 /* If the new current buffer has markers to record PT, BEGV and ZV
1506 when it is not current, fetch them now. */
1507 if (! NILP (b
->pt_marker
))
1509 BUF_PT (b
) = marker_position (b
->pt_marker
);
1510 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1512 if (! NILP (b
->begv_marker
))
1514 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1515 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1517 if (! NILP (b
->zv_marker
))
1519 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1520 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1523 /* Look down buffer's list of local Lisp variables
1524 to find and update any that forward into C variables. */
1526 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1528 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1529 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1530 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1531 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1532 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1533 /* Just reference the variable
1534 to cause it to become set for this buffer. */
1535 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1538 /* Do the same with any others that were local to the previous buffer */
1541 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
1543 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
1544 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1545 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1546 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1547 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1548 /* Just reference the variable
1549 to cause it to become set for this buffer. */
1550 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
1554 /* Switch to buffer B temporarily for redisplay purposes.
1555 This avoids certain things that don't need to be done within redisplay. */
1561 register struct buffer
*old_buf
;
1563 if (current_buffer
== b
)
1566 old_buf
= current_buffer
;
1571 /* If the old current buffer has markers to record PT, BEGV and ZV
1572 when it is not current, update them now. */
1573 if (! NILP (old_buf
->pt_marker
))
1576 XSETBUFFER (obuf
, old_buf
);
1577 set_marker_both (old_buf
->pt_marker
, obuf
,
1578 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1580 if (! NILP (old_buf
->begv_marker
))
1583 XSETBUFFER (obuf
, old_buf
);
1584 set_marker_both (old_buf
->begv_marker
, obuf
,
1585 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1587 if (! NILP (old_buf
->zv_marker
))
1590 XSETBUFFER (obuf
, old_buf
);
1591 set_marker_both (old_buf
->zv_marker
, obuf
,
1592 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1596 /* If the new current buffer has markers to record PT, BEGV and ZV
1597 when it is not current, fetch them now. */
1598 if (! NILP (b
->pt_marker
))
1600 BUF_PT (b
) = marker_position (b
->pt_marker
);
1601 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1603 if (! NILP (b
->begv_marker
))
1605 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1606 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1608 if (! NILP (b
->zv_marker
))
1610 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1611 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1615 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1616 "Make the buffer BUFFER current for editing operations.\n\
1617 BUFFER may be a buffer or the name of an existing buffer.\n\
1618 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1619 This function does not display the buffer, so its effect ends\n\
1620 when the current command terminates.\n\
1621 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1623 register Lisp_Object buffer
;
1625 register Lisp_Object buf
;
1626 buf
= Fget_buffer (buffer
);
1629 if (NILP (XBUFFER (buf
)->name
))
1630 error ("Selecting deleted buffer");
1631 set_buffer_internal (XBUFFER (buf
));
1635 /* Set the current buffer to BUFFER provided it is alive. */
1638 set_buffer_if_live (buffer
)
1641 if (! NILP (XBUFFER (buffer
)->name
))
1642 Fset_buffer (buffer
);
1646 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1647 Sbarf_if_buffer_read_only
, 0, 0, 0,
1648 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1651 if (!NILP (current_buffer
->read_only
)
1652 && NILP (Vinhibit_read_only
))
1653 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1657 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1658 "Put BUFFER at the end of the list of all buffers.\n\
1659 There it is the least likely candidate for `other-buffer' to return;\n\
1660 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1661 If BUFFER is nil or omitted, bury the current buffer.\n\
1662 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1663 selected window if it is displayed there.")
1665 register Lisp_Object buffer
;
1667 /* Figure out what buffer we're going to bury. */
1670 XSETBUFFER (buffer
, current_buffer
);
1672 /* If we're burying the current buffer, unshow it. */
1673 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1679 buf1
= Fget_buffer (buffer
);
1685 /* Move buffer to the end of the buffer list. */
1687 register Lisp_Object aelt
, link
;
1689 aelt
= Frassq (buffer
, Vbuffer_alist
);
1690 link
= Fmemq (aelt
, Vbuffer_alist
);
1691 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1692 XCONS (link
)->cdr
= Qnil
;
1693 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1696 frames_bury_buffer (buffer
);
1701 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1702 "Delete the entire contents of the current buffer.\n\
1703 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1704 so the buffer is truly empty after this.")
1709 if (INTEGERP (current_buffer
->minibuffer_prompt_length
))
1710 del_range (XINT (current_buffer
->minibuffer_prompt_length
), Z
);
1714 current_buffer
->last_window_start
= 1;
1715 /* Prevent warnings, or suspension of auto saving, that would happen
1716 if future size is less than past size. Use of erase-buffer
1717 implies that the future text is not really related to the past text. */
1718 XSETFASTINT (current_buffer
->save_length
, 0);
1723 validate_region (b
, e
)
1724 register Lisp_Object
*b
, *e
;
1726 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1727 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1729 if (XINT (*b
) > XINT (*e
))
1732 tem
= *b
; *b
= *e
; *e
= tem
;
1735 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1736 && XINT (*e
) <= ZV
))
1737 args_out_of_range (*b
, *e
);
1740 /* Advance BYTE_POS up to a character boundary
1741 and return the adjusted position. */
1744 advance_to_char_boundary (byte_pos
)
1749 if (byte_pos
== BEG
)
1750 /* Beginning of buffer is always a character boundary. */
1753 c
= FETCH_BYTE (byte_pos
);
1754 if (! CHAR_HEAD_P (c
))
1756 /* We should advance BYTE_POS only when C is a constituent of a
1757 multibyte sequence. */
1760 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1761 surely advance to the correct character boundary. If C is
1762 not, BYTE_POS was unchanged. */
1768 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1770 "Set the multibyte flag of the current buffer to FLAG.\n\
1771 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1772 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1773 The buffer contents remain unchanged as a sequence of bytes\n\
1774 but the contents viewed as characters do change.")
1778 Lisp_Object tail
, markers
;
1779 struct buffer
*other
;
1781 if (current_buffer
->base_buffer
)
1782 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1784 /* Do nothing if nothing actually changes. */
1785 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1788 /* It would be better to update the list,
1789 but this is good enough for now. */
1790 if (! EQ (current_buffer
->undo_list
, Qt
))
1791 current_buffer
->undo_list
= Qnil
;
1793 /* If the cached position is for this buffer, clear it out. */
1794 clear_charpos_cache (current_buffer
);
1798 /* Do this first, so it can use CHAR_TO_BYTE
1799 to calculate the old correspondences. */
1800 set_intervals_multibyte (0);
1802 current_buffer
->enable_multibyte_characters
= Qnil
;
1808 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1810 tail
= BUF_MARKERS (current_buffer
);
1811 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1813 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1814 tail
= XMARKER (tail
)->chain
;
1819 /* Be sure not to have a multibyte sequence striding over the GAP.
1820 Ex: We change this: "...abc\201\241\241 _GAP_ \241\241\241..."
1821 to: "...abc _GAP_ \201\241\241\241\241\241..." */
1823 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1824 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1826 unsigned char *p
= GPT_ADDR
- 1;
1828 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1829 if (BASE_LEADING_CODE_P (*p
))
1831 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1833 move_gap_both (new_gpt
, new_gpt
);
1837 /* Do this first, so that chars_in_text asks the right question.
1838 set_intervals_multibyte needs it too. */
1839 current_buffer
->enable_multibyte_characters
= Qt
;
1841 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
1842 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
1844 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
1846 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
1847 if (BEGV_BYTE
> GPT_BYTE
)
1848 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
1850 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
1852 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
1853 if (ZV_BYTE
> GPT_BYTE
)
1854 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
1856 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
1859 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
1862 if (pt_byte
> GPT_BYTE
)
1863 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
1865 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
1866 TEMP_SET_PT_BOTH (pt
, pt_byte
);
1869 tail
= markers
= BUF_MARKERS (current_buffer
);
1871 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
1872 getting confused by the markers that have not yet been updated.
1873 It is also a signal that it should never create a marker. */
1874 BUF_MARKERS (current_buffer
) = Qnil
;
1876 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
1878 XMARKER (tail
)->bytepos
1879 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
1880 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
1882 tail
= XMARKER (tail
)->chain
;
1885 /* Make sure no markers were put on the chain
1886 while the chain value was incorrect. */
1887 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
1890 BUF_MARKERS (current_buffer
) = markers
;
1892 /* Do this last, so it can calculate the new correspondences
1893 between chars and bytes. */
1894 set_intervals_multibyte (1);
1897 /* Copy this buffer's new multibyte status
1898 into all of its indirect buffers. */
1899 for (other
= all_buffers
; other
; other
= other
->next
)
1900 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
1901 other
->enable_multibyte_characters
1902 = current_buffer
->enable_multibyte_characters
;
1907 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1909 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1910 Most local variable bindings are eliminated so that the default values\n\
1911 become effective once more. Also, the syntax table is set from\n\
1912 `standard-syntax-table', the local keymap is set to nil,\n\
1913 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1914 This function also forces redisplay of the mode line.\n\
1916 Every function to select a new major mode starts by\n\
1917 calling this function.\n\n\
1918 As a special exception, local variables whose names have\n\
1919 a non-nil `permanent-local' property are not eliminated by this function.\n\
1921 The first thing this function does is run\n\
1922 the normal hook `change-major-mode-hook'.")
1925 register Lisp_Object alist
, sym
, tem
;
1928 if (!NILP (Vrun_hooks
))
1929 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1930 oalist
= current_buffer
->local_var_alist
;
1932 /* Make sure none of the bindings in oalist
1933 remain swapped in, in their symbols. */
1935 swap_out_buffer_local_variables (current_buffer
);
1937 /* Actually eliminate all local bindings of this buffer. */
1939 reset_buffer_local_variables (current_buffer
, 0);
1941 /* Redisplay mode lines; we are changing major mode. */
1943 update_mode_lines
++;
1945 /* Any which are supposed to be permanent,
1946 make local again, with the same values they had. */
1948 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1950 sym
= XCONS (XCONS (alist
)->car
)->car
;
1951 tem
= Fget (sym
, Qpermanent_local
);
1954 Fmake_local_variable (sym
);
1955 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1959 /* Force mode-line redisplay. Useful here because all major mode
1960 commands call this function. */
1961 update_mode_lines
++;
1966 /* Make sure no local variables remain set up with buffer B
1967 for their current values. */
1970 swap_out_buffer_local_variables (b
)
1973 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
1975 XSETBUFFER (buffer
, b
);
1976 oalist
= b
->local_var_alist
;
1978 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1980 sym
= XCONS (XCONS (alist
)->car
)->car
;
1982 /* Need not do anything if some other buffer's binding is now encached. */
1983 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
1984 if (XBUFFER (tem
) == current_buffer
)
1986 /* Symbol is set up for this buffer's old local value.
1987 Set it up for the current buffer with the default value. */
1989 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
1990 /* Store the symbol's current value into the alist entry
1991 it is currently set up for. This is so that, if the
1992 local is marked permanent, and we make it local again
1993 later in Fkill_all_local_variables, we don't lose the value. */
1994 XCONS (XCONS (tem
)->car
)->cdr
1995 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
1996 /* Switch to the symbol's default-value alist entry. */
1997 XCONS (tem
)->car
= tem
;
1998 /* Mark it as current for buffer B. */
1999 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
2000 /* Store the current value into any forwarding in the symbol. */
2001 store_symval_forwarding (sym
,
2002 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
2008 /* Find all the overlays in the current buffer that contain position POS.
2009 Return the number found, and store them in a vector in *VEC_PTR.
2010 Store in *LEN_PTR the size allocated for the vector.
2011 Store in *NEXT_PTR the next position after POS where an overlay starts,
2012 or ZV if there are no more overlays.
2013 Store in *PREV_PTR the previous position before POS where an overlay ends,
2014 or where an overlay starts which ends at or after POS;
2015 or BEGV if there are no such overlays.
2016 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2018 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2019 when this function is called.
2021 If EXTEND is non-zero, we make the vector bigger if necessary.
2022 If EXTEND is zero, we never extend the vector,
2023 and we store only as many overlays as will fit.
2024 But we still return the total number of overlays. */
2027 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2030 Lisp_Object
**vec_ptr
;
2035 Lisp_Object tail
, overlay
, start
, end
, result
;
2038 Lisp_Object
*vec
= *vec_ptr
;
2041 int inhibit_storing
= 0;
2043 for (tail
= current_buffer
->overlays_before
;
2045 tail
= XCONS (tail
)->cdr
)
2047 int startpos
, endpos
;
2049 overlay
= XCONS (tail
)->car
;
2051 start
= OVERLAY_START (overlay
);
2052 end
= OVERLAY_END (overlay
);
2053 endpos
= OVERLAY_POSITION (end
);
2060 startpos
= OVERLAY_POSITION (start
);
2061 /* This one ends at or after POS
2062 so its start counts for PREV_PTR if it's before POS. */
2063 if (prev
< startpos
&& startpos
< pos
)
2067 if (startpos
<= pos
)
2071 /* The supplied vector is full.
2072 Either make it bigger, or don't store any more in it. */
2075 /* Make it work with an initial len == 0. */
2080 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2084 inhibit_storing
= 1;
2087 if (!inhibit_storing
)
2089 /* Keep counting overlays even if we can't return them all. */
2092 else if (startpos
< next
)
2096 for (tail
= current_buffer
->overlays_after
;
2098 tail
= XCONS (tail
)->cdr
)
2100 int startpos
, endpos
;
2102 overlay
= XCONS (tail
)->car
;
2104 start
= OVERLAY_START (overlay
);
2105 end
= OVERLAY_END (overlay
);
2106 startpos
= OVERLAY_POSITION (start
);
2109 if (startpos
< next
)
2113 endpos
= OVERLAY_POSITION (end
);
2120 *len_ptr
= len
*= 2;
2123 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2127 inhibit_storing
= 1;
2130 if (!inhibit_storing
)
2134 if (startpos
< pos
&& startpos
> prev
)
2137 else if (endpos
< pos
&& endpos
> prev
)
2139 else if (endpos
== pos
&& startpos
> prev
)
2150 /* Find all the overlays in the current buffer that overlap the range BEG-END
2151 or are empty at BEG.
2153 Return the number found, and store them in a vector in *VEC_PTR.
2154 Store in *LEN_PTR the size allocated for the vector.
2155 Store in *NEXT_PTR the next position after POS where an overlay starts,
2156 or ZV if there are no more overlays.
2157 Store in *PREV_PTR the previous position before POS where an overlay ends,
2158 or BEGV if there are no previous overlays.
2159 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2161 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2162 when this function is called.
2164 If EXTEND is non-zero, we make the vector bigger if necessary.
2165 If EXTEND is zero, we never extend the vector,
2166 and we store only as many overlays as will fit.
2167 But we still return the total number of overlays. */
2170 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2173 Lisp_Object
**vec_ptr
;
2178 Lisp_Object tail
, overlay
, ostart
, oend
, result
;
2181 Lisp_Object
*vec
= *vec_ptr
;
2184 int inhibit_storing
= 0;
2186 for (tail
= current_buffer
->overlays_before
;
2188 tail
= XCONS (tail
)->cdr
)
2190 int startpos
, endpos
;
2192 overlay
= XCONS (tail
)->car
;
2194 ostart
= OVERLAY_START (overlay
);
2195 oend
= OVERLAY_END (overlay
);
2196 endpos
= OVERLAY_POSITION (oend
);
2203 startpos
= OVERLAY_POSITION (ostart
);
2204 /* Count an interval if it either overlaps the range
2205 or is empty at the start of the range. */
2206 if ((beg
< endpos
&& startpos
< end
)
2207 || (startpos
== endpos
&& beg
== endpos
))
2211 /* The supplied vector is full.
2212 Either make it bigger, or don't store any more in it. */
2215 *len_ptr
= len
*= 2;
2216 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2220 inhibit_storing
= 1;
2223 if (!inhibit_storing
)
2225 /* Keep counting overlays even if we can't return them all. */
2228 else if (startpos
< next
)
2232 for (tail
= current_buffer
->overlays_after
;
2234 tail
= XCONS (tail
)->cdr
)
2236 int startpos
, endpos
;
2238 overlay
= XCONS (tail
)->car
;
2240 ostart
= OVERLAY_START (overlay
);
2241 oend
= OVERLAY_END (overlay
);
2242 startpos
= OVERLAY_POSITION (ostart
);
2245 if (startpos
< next
)
2249 endpos
= OVERLAY_POSITION (oend
);
2250 /* Count an interval if it either overlaps the range
2251 or is empty at the start of the range. */
2252 if ((beg
< endpos
&& startpos
< end
)
2253 || (startpos
== endpos
&& beg
== endpos
))
2259 *len_ptr
= len
*= 2;
2260 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2264 inhibit_storing
= 1;
2267 if (!inhibit_storing
)
2271 else if (endpos
< beg
&& endpos
> prev
)
2282 /* Fast function to just test if we're at an overlay boundary. */
2284 overlay_touches_p (pos
)
2287 Lisp_Object tail
, overlay
;
2289 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2290 tail
= XCONS (tail
)->cdr
)
2294 overlay
= XCONS (tail
)->car
;
2295 if (!GC_OVERLAYP (overlay
))
2298 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2301 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2305 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2306 tail
= XCONS (tail
)->cdr
)
2310 overlay
= XCONS (tail
)->car
;
2311 if (!GC_OVERLAYP (overlay
))
2314 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2317 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2325 Lisp_Object overlay
;
2331 compare_overlays (v1
, v2
)
2332 const void *v1
, *v2
;
2334 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2335 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2336 if (s1
->priority
!= s2
->priority
)
2337 return s1
->priority
- s2
->priority
;
2338 if (s1
->beg
!= s2
->beg
)
2339 return s1
->beg
- s2
->beg
;
2340 if (s1
->end
!= s2
->end
)
2341 return s2
->end
- s1
->end
;
2345 /* Sort an array of overlays by priority. The array is modified in place.
2346 The return value is the new size; this may be smaller than the original
2347 size if some of the overlays were invalid or were window-specific. */
2349 sort_overlays (overlay_vec
, noverlays
, w
)
2350 Lisp_Object
*overlay_vec
;
2355 struct sortvec
*sortvec
;
2356 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2358 /* Put the valid and relevant overlays into sortvec. */
2360 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2363 Lisp_Object overlay
;
2365 overlay
= overlay_vec
[i
];
2366 if (OVERLAY_VALID (overlay
)
2367 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2368 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2370 /* If we're interested in a specific window, then ignore
2371 overlays that are limited to some other window. */
2376 window
= Foverlay_get (overlay
, Qwindow
);
2377 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2381 /* This overlay is good and counts: put it into sortvec. */
2382 sortvec
[j
].overlay
= overlay
;
2383 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2384 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2385 tem
= Foverlay_get (overlay
, Qpriority
);
2387 sortvec
[j
].priority
= XINT (tem
);
2389 sortvec
[j
].priority
= 0;
2395 /* Sort the overlays into the proper order: increasing priority. */
2398 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2400 for (i
= 0; i
< noverlays
; i
++)
2401 overlay_vec
[i
] = sortvec
[i
].overlay
;
2407 Lisp_Object string
, string2
;
2414 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2415 int size
; /* Allocated length of that array. */
2416 int used
; /* How much of the array is currently in use. */
2417 int bytes
; /* Total length of the strings in buf. */
2420 /* Buffers for storing information about the overlays touching a given
2421 position. These could be automatic variables in overlay_strings, but
2422 it's more efficient to hold onto the memory instead of repeatedly
2423 allocating and freeing it. */
2424 static struct sortstrlist overlay_heads
, overlay_tails
;
2425 static unsigned char *overlay_str_buf
;
2427 /* Allocated length of overlay_str_buf. */
2428 static int overlay_str_len
;
2430 /* A comparison function suitable for passing to qsort. */
2432 cmp_for_strings (as1
, as2
)
2435 struct sortstr
*s1
= (struct sortstr
*)as1
;
2436 struct sortstr
*s2
= (struct sortstr
*)as2
;
2437 if (s1
->size
!= s2
->size
)
2438 return s2
->size
- s1
->size
;
2439 if (s1
->priority
!= s2
->priority
)
2440 return s1
->priority
- s2
->priority
;
2445 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2446 struct sortstrlist
*ssl
;
2447 Lisp_Object str
, str2
, pri
;
2452 if (ssl
->used
== ssl
->size
)
2458 ssl
->buf
= ((struct sortstr
*)
2459 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2461 ssl
->buf
[ssl
->used
].string
= str
;
2462 ssl
->buf
[ssl
->used
].string2
= str2
;
2463 ssl
->buf
[ssl
->used
].size
= size
;
2464 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2467 if (NILP (current_buffer
->enable_multibyte_characters
))
2468 nbytes
= XSTRING (str
)->size
;
2469 else if (! STRING_MULTIBYTE (str
))
2470 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2471 STRING_BYTES (XSTRING (str
)));
2473 nbytes
= STRING_BYTES (XSTRING (str
));
2475 ssl
->bytes
+= nbytes
;
2479 if (NILP (current_buffer
->enable_multibyte_characters
))
2480 nbytes
= XSTRING (str2
)->size
;
2481 else if (! STRING_MULTIBYTE (str2
))
2482 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2483 STRING_BYTES (XSTRING (str2
)));
2485 nbytes
= STRING_BYTES (XSTRING (str2
));
2487 ssl
->bytes
+= nbytes
;
2491 /* Return the concatenation of the strings associated with overlays that
2492 begin or end at POS, ignoring overlays that are specific to a window
2493 other than W. The strings are concatenated in the appropriate order:
2494 shorter overlays nest inside longer ones, and higher priority inside
2495 lower. Normally all of the after-strings come first, but zero-sized
2496 overlays have their after-strings ride along with the before-strings
2497 because it would look strange to print them inside-out.
2499 Returns the string length, and stores the contents indirectly through
2500 PSTR, if that variable is non-null. The string may be overwritten by
2501 subsequent calls. */
2504 overlay_strings (pos
, w
, pstr
)
2507 unsigned char **pstr
;
2509 Lisp_Object ov
, overlay
, window
, str
;
2510 int startpos
, endpos
;
2511 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2513 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2514 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2515 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2517 overlay
= XCONS (ov
)->car
;
2518 if (!OVERLAYP (overlay
))
2521 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2522 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2525 if (endpos
!= pos
&& startpos
!= pos
)
2527 window
= Foverlay_get (overlay
, Qwindow
);
2528 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2531 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2532 record_overlay_string (&overlay_heads
, str
,
2534 ? Foverlay_get (overlay
, Qafter_string
)
2536 Foverlay_get (overlay
, Qpriority
),
2538 else if (endpos
== pos
2539 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2540 record_overlay_string (&overlay_tails
, str
, Qnil
,
2541 Foverlay_get (overlay
, Qpriority
),
2544 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCONS (ov
)->cdr
)
2546 overlay
= XCONS (ov
)->car
;
2547 if (!OVERLAYP (overlay
))
2550 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2551 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2554 if (endpos
!= pos
&& startpos
!= pos
)
2556 window
= Foverlay_get (overlay
, Qwindow
);
2557 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2560 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2561 record_overlay_string (&overlay_heads
, str
,
2563 ? Foverlay_get (overlay
, Qafter_string
)
2565 Foverlay_get (overlay
, Qpriority
),
2567 else if (endpos
== pos
2568 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2569 record_overlay_string (&overlay_tails
, str
, Qnil
,
2570 Foverlay_get (overlay
, Qpriority
),
2573 if (overlay_tails
.used
> 1)
2574 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2576 if (overlay_heads
.used
> 1)
2577 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2579 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2584 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2586 if (total
> overlay_str_len
)
2588 overlay_str_len
= total
;
2589 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2592 p
= overlay_str_buf
;
2593 for (i
= overlay_tails
.used
; --i
>= 0;)
2596 tem
= overlay_tails
.buf
[i
].string
;
2597 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2598 STRING_BYTES (XSTRING (tem
)),
2599 STRING_MULTIBYTE (tem
), multibyte
);
2602 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2605 tem
= overlay_heads
.buf
[i
].string
;
2606 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2607 STRING_BYTES (XSTRING (tem
)),
2608 STRING_MULTIBYTE (tem
), multibyte
);
2610 tem
= overlay_heads
.buf
[i
].string2
;
2613 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2614 STRING_BYTES (XSTRING (tem
)),
2615 STRING_MULTIBYTE (tem
), multibyte
);
2619 if (p
!= overlay_str_buf
+ total
)
2622 *pstr
= overlay_str_buf
;
2628 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2631 recenter_overlay_lists (buf
, pos
)
2635 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2637 /* See if anything in overlays_before should move to overlays_after. */
2639 /* We don't strictly need prev in this loop; it should always be nil.
2640 But we use it for symmetry and in case that should cease to be true
2641 with some future change. */
2643 for (tail
= buf
->overlays_before
;
2645 prev
= tail
, tail
= next
)
2647 next
= XCONS (tail
)->cdr
;
2648 overlay
= XCONS (tail
)->car
;
2650 /* If the overlay is not valid, get rid of it. */
2651 if (!OVERLAY_VALID (overlay
))
2656 /* Splice the cons cell TAIL out of overlays_before. */
2658 XCONS (prev
)->cdr
= next
;
2660 buf
->overlays_before
= next
;
2666 beg
= OVERLAY_START (overlay
);
2667 end
= OVERLAY_END (overlay
);
2669 if (OVERLAY_POSITION (end
) > pos
)
2671 /* OVERLAY needs to be moved. */
2672 int where
= OVERLAY_POSITION (beg
);
2673 Lisp_Object other
, other_prev
;
2675 /* Splice the cons cell TAIL out of overlays_before. */
2677 XCONS (prev
)->cdr
= next
;
2679 buf
->overlays_before
= next
;
2681 /* Search thru overlays_after for where to put it. */
2683 for (other
= buf
->overlays_after
;
2685 other_prev
= other
, other
= XCONS (other
)->cdr
)
2687 Lisp_Object otherbeg
, otheroverlay
, follower
;
2690 otheroverlay
= XCONS (other
)->car
;
2691 if (! OVERLAY_VALID (otheroverlay
))
2694 otherbeg
= OVERLAY_START (otheroverlay
);
2695 if (OVERLAY_POSITION (otherbeg
) >= where
)
2699 /* Add TAIL to overlays_after before OTHER. */
2700 XCONS (tail
)->cdr
= other
;
2701 if (!NILP (other_prev
))
2702 XCONS (other_prev
)->cdr
= tail
;
2704 buf
->overlays_after
= tail
;
2708 /* We've reached the things that should stay in overlays_before.
2709 All the rest of overlays_before must end even earlier,
2714 /* See if anything in overlays_after should be in overlays_before. */
2716 for (tail
= buf
->overlays_after
;
2718 prev
= tail
, tail
= next
)
2720 next
= XCONS (tail
)->cdr
;
2721 overlay
= XCONS (tail
)->car
;
2723 /* If the overlay is not valid, get rid of it. */
2724 if (!OVERLAY_VALID (overlay
))
2729 /* Splice the cons cell TAIL out of overlays_after. */
2731 XCONS (prev
)->cdr
= next
;
2733 buf
->overlays_after
= next
;
2739 beg
= OVERLAY_START (overlay
);
2740 end
= OVERLAY_END (overlay
);
2742 /* Stop looking, when we know that nothing further
2743 can possibly end before POS. */
2744 if (OVERLAY_POSITION (beg
) > pos
)
2747 if (OVERLAY_POSITION (end
) <= pos
)
2749 /* OVERLAY needs to be moved. */
2750 int where
= OVERLAY_POSITION (end
);
2751 Lisp_Object other
, other_prev
;
2753 /* Splice the cons cell TAIL out of overlays_after. */
2755 XCONS (prev
)->cdr
= next
;
2757 buf
->overlays_after
= next
;
2759 /* Search thru overlays_before for where to put it. */
2761 for (other
= buf
->overlays_before
;
2763 other_prev
= other
, other
= XCONS (other
)->cdr
)
2765 Lisp_Object otherend
, otheroverlay
;
2768 otheroverlay
= XCONS (other
)->car
;
2769 if (! OVERLAY_VALID (otheroverlay
))
2772 otherend
= OVERLAY_END (otheroverlay
);
2773 if (OVERLAY_POSITION (otherend
) <= where
)
2777 /* Add TAIL to overlays_before before OTHER. */
2778 XCONS (tail
)->cdr
= other
;
2779 if (!NILP (other_prev
))
2780 XCONS (other_prev
)->cdr
= tail
;
2782 buf
->overlays_before
= tail
;
2787 XSETFASTINT (buf
->overlay_center
, pos
);
2791 adjust_overlays_for_insert (pos
, length
)
2795 /* After an insertion, the lists are still sorted properly,
2796 but we may need to update the value of the overlay center. */
2797 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
2798 XSETFASTINT (current_buffer
->overlay_center
,
2799 XFASTINT (current_buffer
->overlay_center
) + length
);
2803 adjust_overlays_for_delete (pos
, length
)
2807 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
2808 /* The deletion was to our right. No change needed; the before- and
2809 after-lists are still consistent. */
2811 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
2812 /* The deletion was to our left. We need to adjust the center value
2813 to account for the change in position, but the lists are consistent
2814 given the new value. */
2815 XSETFASTINT (current_buffer
->overlay_center
,
2816 XFASTINT (current_buffer
->overlay_center
) - length
);
2818 /* We're right in the middle. There might be things on the after-list
2819 that now belong on the before-list. Recentering will move them,
2820 and also update the center point. */
2821 recenter_overlay_lists (current_buffer
, pos
);
2824 /* Fix up overlays that were garbled as a result of permuting markers
2825 in the range START through END. Any overlay with at least one
2826 endpoint in this range will need to be unlinked from the overlay
2827 list and reinserted in its proper place.
2828 Such an overlay might even have negative size at this point.
2829 If so, we'll reverse the endpoints. Can you think of anything
2830 better to do in this situation? */
2832 fix_overlays_in_range (start
, end
)
2833 register int start
, end
;
2835 Lisp_Object tem
, overlay
;
2836 Lisp_Object before_list
, after_list
;
2837 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
2838 int startpos
, endpos
;
2840 /* This algorithm shifts links around instead of consing and GCing.
2841 The loop invariant is that before_list (resp. after_list) is a
2842 well-formed list except that its last element, the one that
2843 *pbefore (resp. *pafter) points to, is still uninitialized.
2844 So it's not a bug that before_list isn't initialized, although
2845 it may look strange. */
2846 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
2848 overlay
= XCONS (*ptail
)->car
;
2849 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2852 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2854 || (startpos
>= start
&& startpos
< end
))
2856 /* If the overlay is backwards, fix that now. */
2857 if (startpos
> endpos
)
2860 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2862 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2864 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2866 /* Add it to the end of the wrong list. Later on,
2867 recenter_overlay_lists will move it to the right place. */
2868 if (endpos
< XINT (current_buffer
->overlay_center
))
2871 pafter
= &XCONS (*ptail
)->cdr
;
2876 pbefore
= &XCONS (*ptail
)->cdr
;
2878 *ptail
= XCONS (*ptail
)->cdr
;
2881 ptail
= &XCONS (*ptail
)->cdr
;
2883 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
2885 overlay
= XCONS (*ptail
)->car
;
2886 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2887 if (startpos
>= end
)
2889 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2890 if (startpos
>= start
2891 || (endpos
>= start
&& endpos
< end
))
2893 if (startpos
> endpos
)
2896 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
2898 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
2900 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
2902 if (endpos
< XINT (current_buffer
->overlay_center
))
2905 pafter
= &XCONS (*ptail
)->cdr
;
2910 pbefore
= &XCONS (*ptail
)->cdr
;
2912 *ptail
= XCONS (*ptail
)->cdr
;
2915 ptail
= &XCONS (*ptail
)->cdr
;
2918 /* Splice the constructed (wrong) lists into the buffer's lists,
2919 and let the recenter function make it sane again. */
2920 *pbefore
= current_buffer
->overlays_before
;
2921 current_buffer
->overlays_before
= before_list
;
2922 recenter_overlay_lists (current_buffer
,
2923 XINT (current_buffer
->overlay_center
));
2925 *pafter
= current_buffer
->overlays_after
;
2926 current_buffer
->overlays_after
= after_list
;
2927 recenter_overlay_lists (current_buffer
,
2928 XINT (current_buffer
->overlay_center
));
2931 /* We have two types of overlay: the one whose ending marker is
2932 after-insertion-marker (this is the usual case) and the one whose
2933 ending marker is before-insertion-marker. When `overlays_before'
2934 contains overlays of the latter type and the former type in this
2935 order and both overlays end at inserting position, inserting a text
2936 increases only the ending marker of the latter type, which results
2937 in incorrect ordering of `overlays_before'.
2939 This function fixes ordering of overlays in the slot
2940 `overlays_before' of the buffer *BP. Before the insertion, `point'
2941 was at PREV, and now is at POS. */
2944 fix_overlays_before (bp
, prev
, pos
)
2948 Lisp_Object
*tailp
= &bp
->overlays_before
;
2949 Lisp_Object
*right_place
;
2952 /* After the insertion, the several overlays may be in incorrect
2953 order. The possibility is that, in the list `overlays_before',
2954 an overlay which ends at POS appears after an overlay which ends
2955 at PREV. Since POS is greater than PREV, we must fix the
2956 ordering of these overlays, by moving overlays ends at POS before
2957 the overlays ends at PREV. */
2959 /* At first, find a place where disordered overlays should be linked
2960 in. It is where an overlay which end before POS exists. (i.e. an
2961 overlay whose ending marker is after-insertion-marker if disorder
2963 while (!NILP (*tailp
)
2964 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
)))
2966 tailp
= &XCONS (*tailp
)->cdr
;
2968 /* If we don't find such an overlay,
2969 or the found one ends before PREV,
2970 or the found one is the last one in the list,
2971 we don't have to fix anything. */
2974 || NILP (XCONS (*tailp
)->cdr
))
2977 right_place
= tailp
;
2978 tailp
= &XCONS (*tailp
)->cdr
;
2980 /* Now, end position of overlays in the list *TAILP should be before
2981 or equal to PREV. In the loop, an overlay which ends at POS is
2982 moved ahead to the place pointed by RIGHT_PLACE. If we found an
2983 overlay which ends before PREV, the remaining overlays are in
2985 while (!NILP (*tailp
))
2987 end
= OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp
)->car
));
2990 { /* This overlay is disordered. */
2991 Lisp_Object found
= *tailp
;
2993 /* Unlink the found overlay. */
2994 *tailp
= XCONS (found
)->cdr
;
2995 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
2996 XCONS (found
)->cdr
= *right_place
;
2997 /* Link it into the right place. */
2998 *right_place
= found
;
3000 else if (end
== prev
)
3001 tailp
= &XCONS (*tailp
)->cdr
;
3002 else /* No more disordered overlay. */
3007 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3008 "Return t if OBJECT is an overlay.")
3012 return (OVERLAYP (object
) ? Qt
: Qnil
);
3015 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3016 "Create a new overlay with range BEG to END in BUFFER.\n\
3017 If omitted, BUFFER defaults to the current buffer.\n\
3018 BEG and END may be integers or markers.\n\
3019 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
3020 front delimiter advance when text is inserted there.\n\
3021 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
3022 rear delimiter advance when text is inserted there.")
3023 (beg
, end
, buffer
, front_advance
, rear_advance
)
3024 Lisp_Object beg
, end
, buffer
;
3025 Lisp_Object front_advance
, rear_advance
;
3027 Lisp_Object overlay
;
3031 XSETBUFFER (buffer
, current_buffer
);
3033 CHECK_BUFFER (buffer
, 2);
3035 && ! EQ (Fmarker_buffer (beg
), buffer
))
3036 error ("Marker points into wrong buffer");
3038 && ! EQ (Fmarker_buffer (end
), buffer
))
3039 error ("Marker points into wrong buffer");
3041 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3042 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3044 if (XINT (beg
) > XINT (end
))
3047 temp
= beg
; beg
= end
; end
= temp
;
3050 b
= XBUFFER (buffer
);
3052 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3053 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3055 if (!NILP (front_advance
))
3056 XMARKER (beg
)->insertion_type
= 1;
3057 if (!NILP (rear_advance
))
3058 XMARKER (end
)->insertion_type
= 1;
3060 overlay
= allocate_misc ();
3061 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3062 XOVERLAY (overlay
)->start
= beg
;
3063 XOVERLAY (overlay
)->end
= end
;
3064 XOVERLAY (overlay
)->plist
= Qnil
;
3066 /* Put the new overlay on the wrong list. */
3067 end
= OVERLAY_END (overlay
);
3068 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3069 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3071 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3073 /* This puts it in the right list, and in the right order. */
3074 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3076 /* We don't need to redisplay the region covered by the overlay, because
3077 the overlay has no properties at the moment. */
3082 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3085 modify_overlay (buf
, start
, end
)
3095 start
= end
; end
= temp
;
3098 /* If this is a buffer not in the selected window,
3099 we must do other windows. */
3100 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3101 windows_or_buffers_changed
= 1;
3102 /* If multiple windows show this buffer, we must do other windows. */
3103 else if (buffer_shared
> 1)
3104 windows_or_buffers_changed
= 1;
3106 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3108 ++BUF_OVERLAY_MODIFF (buf
);
3112 Lisp_Object
Fdelete_overlay ();
3114 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3115 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3116 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3117 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3119 (overlay
, beg
, end
, buffer
)
3120 Lisp_Object overlay
, beg
, end
, buffer
;
3122 struct buffer
*b
, *ob
;
3123 Lisp_Object obuffer
;
3124 int count
= specpdl_ptr
- specpdl
;
3126 CHECK_OVERLAY (overlay
, 0);
3128 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3130 XSETBUFFER (buffer
, current_buffer
);
3131 CHECK_BUFFER (buffer
, 3);
3134 && ! EQ (Fmarker_buffer (beg
), buffer
))
3135 error ("Marker points into wrong buffer");
3137 && ! EQ (Fmarker_buffer (end
), buffer
))
3138 error ("Marker points into wrong buffer");
3140 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3141 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3143 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3144 return Fdelete_overlay (overlay
);
3146 if (XINT (beg
) > XINT (end
))
3149 temp
= beg
; beg
= end
; end
= temp
;
3152 specbind (Qinhibit_quit
, Qt
);
3154 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3155 b
= XBUFFER (buffer
);
3156 ob
= XBUFFER (obuffer
);
3158 /* If the overlay has changed buffers, do a thorough redisplay. */
3159 if (!EQ (buffer
, obuffer
))
3161 /* Redisplay where the overlay was. */
3162 if (!NILP (obuffer
))
3167 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3168 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3170 modify_overlay (ob
, o_beg
, o_end
);
3173 /* Redisplay where the overlay is going to be. */
3174 modify_overlay (b
, XINT (beg
), XINT (end
));
3177 /* Redisplay the area the overlay has just left, or just enclosed. */
3180 int change_beg
, change_end
;
3182 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3183 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3185 if (o_beg
== XINT (beg
))
3186 modify_overlay (b
, o_end
, XINT (end
));
3187 else if (o_end
== XINT (end
))
3188 modify_overlay (b
, o_beg
, XINT (beg
));
3191 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3192 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3193 modify_overlay (b
, o_beg
, o_end
);
3197 if (!NILP (obuffer
))
3199 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3200 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3203 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3204 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3206 /* Put the overlay on the wrong list. */
3207 end
= OVERLAY_END (overlay
);
3208 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3209 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3211 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3213 /* This puts it in the right list, and in the right order. */
3214 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3216 return unbind_to (count
, overlay
);
3219 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3220 "Delete the overlay OVERLAY from its buffer.")
3222 Lisp_Object overlay
;
3226 int count
= specpdl_ptr
- specpdl
;
3228 CHECK_OVERLAY (overlay
, 0);
3230 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3234 b
= XBUFFER (buffer
);
3236 specbind (Qinhibit_quit
, Qt
);
3238 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3239 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3242 marker_position (OVERLAY_START (overlay
)),
3243 marker_position (OVERLAY_END (overlay
)));
3245 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3246 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3248 return unbind_to (count
, Qnil
);
3251 /* Overlay dissection functions. */
3253 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3254 "Return the position at which OVERLAY starts.")
3256 Lisp_Object overlay
;
3258 CHECK_OVERLAY (overlay
, 0);
3260 return (Fmarker_position (OVERLAY_START (overlay
)));
3263 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3264 "Return the position at which OVERLAY ends.")
3266 Lisp_Object overlay
;
3268 CHECK_OVERLAY (overlay
, 0);
3270 return (Fmarker_position (OVERLAY_END (overlay
)));
3273 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3274 "Return the buffer OVERLAY belongs to.")
3276 Lisp_Object overlay
;
3278 CHECK_OVERLAY (overlay
, 0);
3280 return Fmarker_buffer (OVERLAY_START (overlay
));
3283 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3284 "Return a list of the properties on OVERLAY.\n\
3285 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3288 Lisp_Object overlay
;
3290 CHECK_OVERLAY (overlay
, 0);
3292 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3296 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3297 "Return a list of the overlays that contain position POS.")
3302 Lisp_Object
*overlay_vec
;
3306 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3309 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3311 /* Put all the overlays we want in a vector in overlay_vec.
3312 Store the length in len. */
3313 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3314 (int *) 0, (int *) 0);
3316 /* Make a list of them all. */
3317 result
= Flist (noverlays
, overlay_vec
);
3319 xfree (overlay_vec
);
3323 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3324 "Return a list of the overlays that overlap the region BEG ... END.\n\
3325 Overlap means that at least one character is contained within the overlay\n\
3326 and also contained within the specified region.\n\
3327 Empty overlays are included in the result if they are located at BEG\n\
3328 or between BEG and END.")
3330 Lisp_Object beg
, end
;
3333 Lisp_Object
*overlay_vec
;
3337 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3338 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3341 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3343 /* Put all the overlays we want in a vector in overlay_vec.
3344 Store the length in len. */
3345 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3346 (int *) 0, (int *) 0);
3348 /* Make a list of them all. */
3349 result
= Flist (noverlays
, overlay_vec
);
3351 xfree (overlay_vec
);
3355 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3357 "Return the next position after POS where an overlay starts or ends.\n\
3358 If there are no more overlay boundaries after POS, return (point-max).")
3364 Lisp_Object
*overlay_vec
;
3368 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3371 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3373 /* Put all the overlays we want in a vector in overlay_vec.
3374 Store the length in len.
3375 endpos gets the position where the next overlay starts. */
3376 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3377 &endpos
, (int *) 0);
3379 /* If any of these overlays ends before endpos,
3380 use its ending point instead. */
3381 for (i
= 0; i
< noverlays
; i
++)
3386 oend
= OVERLAY_END (overlay_vec
[i
]);
3387 oendpos
= OVERLAY_POSITION (oend
);
3388 if (oendpos
< endpos
)
3392 xfree (overlay_vec
);
3393 return make_number (endpos
);
3396 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3397 Sprevious_overlay_change
, 1, 1, 0,
3398 "Return the previous position before POS where an overlay starts or ends.\n\
3399 If there are no more overlay boundaries before POS, return (point-min).")
3405 Lisp_Object
*overlay_vec
;
3410 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3413 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3415 /* At beginning of buffer, we know the answer;
3416 avoid bug subtracting 1 below. */
3417 if (XINT (pos
) == BEGV
)
3420 /* Put all the overlays we want in a vector in overlay_vec.
3421 Store the length in len.
3422 prevpos gets the position of the previous change. */
3423 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3424 (int *) 0, &prevpos
);
3426 xfree (overlay_vec
);
3427 return make_number (prevpos
);
3430 /* These functions are for debugging overlays. */
3432 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3433 "Return a pair of lists giving all the overlays of the current buffer.\n\
3434 The car has all the overlays before the overlay center;\n\
3435 the cdr has all the overlays after the overlay center.\n\
3436 Recentering overlays moves overlays between these lists.\n\
3437 The lists you get are copies, so that changing them has no effect.\n\
3438 However, the overlays you get are the real objects that the buffer uses.")
3441 Lisp_Object before
, after
;
3442 before
= current_buffer
->overlays_before
;
3444 before
= Fcopy_sequence (before
);
3445 after
= current_buffer
->overlays_after
;
3447 after
= Fcopy_sequence (after
);
3449 return Fcons (before
, after
);
3452 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3453 "Recenter the overlays of the current buffer around position POS.")
3457 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3459 recenter_overlay_lists (current_buffer
, XINT (pos
));
3463 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3464 "Get the property of overlay OVERLAY with property name PROP.")
3466 Lisp_Object overlay
, prop
;
3468 Lisp_Object plist
, fallback
;
3470 CHECK_OVERLAY (overlay
, 0);
3474 for (plist
= XOVERLAY (overlay
)->plist
;
3475 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
3476 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
3478 if (EQ (XCONS (plist
)->car
, prop
))
3479 return XCONS (XCONS (plist
)->cdr
)->car
;
3480 else if (EQ (XCONS (plist
)->car
, Qcategory
))
3483 tem
= Fcar (Fcdr (plist
));
3485 fallback
= Fget (tem
, prop
);
3492 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3493 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3494 (overlay
, prop
, value
)
3495 Lisp_Object overlay
, prop
, value
;
3497 Lisp_Object tail
, buffer
;
3500 CHECK_OVERLAY (overlay
, 0);
3502 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3504 for (tail
= XOVERLAY (overlay
)->plist
;
3505 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
3506 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
3507 if (EQ (XCONS (tail
)->car
, prop
))
3509 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
3510 XCONS (XCONS (tail
)->cdr
)->car
= value
;
3513 /* It wasn't in the list, so add it to the front. */
3514 changed
= !NILP (value
);
3515 XOVERLAY (overlay
)->plist
3516 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3518 if (! NILP (buffer
))
3521 modify_overlay (XBUFFER (buffer
),
3522 marker_position (OVERLAY_START (overlay
)),
3523 marker_position (OVERLAY_END (overlay
)));
3524 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3525 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3526 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3527 Fdelete_overlay (overlay
);
3532 /* Subroutine of report_overlay_modification. */
3534 /* Lisp vector holding overlay hook functions to call.
3535 Vector elements come in pairs.
3536 Each even-index element is a list of hook functions.
3537 The following odd-index element is the overlay they came from.
3539 Before the buffer change, we fill in this vector
3540 as we call overlay hook functions.
3541 After the buffer change, we get the functions to call from this vector.
3542 This way we always call the same functions before and after the change. */
3543 static Lisp_Object last_overlay_modification_hooks
;
3545 /* Number of elements actually used in last_overlay_modification_hooks. */
3546 static int last_overlay_modification_hooks_used
;
3548 /* Add one functionlist/overlay pair
3549 to the end of last_overlay_modification_hooks. */
3552 add_overlay_mod_hooklist (functionlist
, overlay
)
3553 Lisp_Object functionlist
, overlay
;
3555 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3557 if (last_overlay_modification_hooks_used
== oldsize
)
3560 old
= last_overlay_modification_hooks
;
3561 last_overlay_modification_hooks
3562 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3563 bcopy (XVECTOR (old
)->contents
,
3564 XVECTOR (last_overlay_modification_hooks
)->contents
,
3565 sizeof (Lisp_Object
) * oldsize
);
3567 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3568 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3571 /* Run the modification-hooks of overlays that include
3572 any part of the text in START to END.
3573 If this change is an insertion, also
3574 run the insert-before-hooks of overlay starting at END,
3575 and the insert-after-hooks of overlay ending at START.
3577 This is called both before and after the modification.
3578 AFTER is nonzero when we call after the modification.
3580 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3581 When AFTER is nonzero, they are the start position,
3582 the position after the inserted new text,
3583 and the length of deleted or replaced old text. */
3586 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3587 Lisp_Object start
, end
;
3589 Lisp_Object arg1
, arg2
, arg3
;
3591 Lisp_Object prop
, overlay
, tail
;
3592 /* 1 if this change is an insertion. */
3593 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3595 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3599 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3603 /* Call the functions recorded in last_overlay_modification_hooks
3604 rather than scanning the overlays again.
3605 First copy the vector contents, in case some of these hooks
3606 do subsequent modification of the buffer. */
3607 int size
= last_overlay_modification_hooks_used
;
3608 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3611 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3612 copy
, size
* sizeof (Lisp_Object
));
3614 gcpro1
.nvars
= size
;
3616 for (i
= 0; i
< size
;)
3618 Lisp_Object prop
, overlay
;
3620 overlay
= copy
[i
++];
3621 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3627 /* We are being called before a change.
3628 Scan the overlays to find the functions to call. */
3629 last_overlay_modification_hooks_used
= 0;
3631 for (tail
= current_buffer
->overlays_before
;
3633 tail
= XCONS (tail
)->cdr
)
3635 int startpos
, endpos
;
3636 Lisp_Object ostart
, oend
;
3638 overlay
= XCONS (tail
)->car
;
3640 ostart
= OVERLAY_START (overlay
);
3641 oend
= OVERLAY_END (overlay
);
3642 endpos
= OVERLAY_POSITION (oend
);
3643 if (XFASTINT (start
) > endpos
)
3645 startpos
= OVERLAY_POSITION (ostart
);
3646 if (insertion
&& (XFASTINT (start
) == startpos
3647 || XFASTINT (end
) == startpos
))
3649 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3652 /* Copy TAIL in case the hook recenters the overlay lists. */
3654 tail
= Fcopy_sequence (tail
);
3656 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3659 if (insertion
&& (XFASTINT (start
) == endpos
3660 || XFASTINT (end
) == endpos
))
3662 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3666 tail
= Fcopy_sequence (tail
);
3668 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3671 /* Test for intersecting intervals. This does the right thing
3672 for both insertion and deletion. */
3673 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3675 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3679 tail
= Fcopy_sequence (tail
);
3681 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3687 for (tail
= current_buffer
->overlays_after
;
3689 tail
= XCONS (tail
)->cdr
)
3691 int startpos
, endpos
;
3692 Lisp_Object ostart
, oend
;
3694 overlay
= XCONS (tail
)->car
;
3696 ostart
= OVERLAY_START (overlay
);
3697 oend
= OVERLAY_END (overlay
);
3698 startpos
= OVERLAY_POSITION (ostart
);
3699 endpos
= OVERLAY_POSITION (oend
);
3700 if (XFASTINT (end
) < startpos
)
3702 if (insertion
&& (XFASTINT (start
) == startpos
3703 || XFASTINT (end
) == startpos
))
3705 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3709 tail
= Fcopy_sequence (tail
);
3711 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3714 if (insertion
&& (XFASTINT (start
) == endpos
3715 || XFASTINT (end
) == endpos
))
3717 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3721 tail
= Fcopy_sequence (tail
);
3723 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3726 /* Test for intersecting intervals. This does the right thing
3727 for both insertion and deletion. */
3728 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3730 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3734 tail
= Fcopy_sequence (tail
);
3736 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3745 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3746 Lisp_Object list
, overlay
;
3748 Lisp_Object arg1
, arg2
, arg3
;
3750 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3752 GCPRO4 (list
, arg1
, arg2
, arg3
);
3754 add_overlay_mod_hooklist (list
, overlay
);
3756 while (!NILP (list
))
3759 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3761 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3767 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3770 evaporate_overlays (pos
)
3773 Lisp_Object tail
, overlay
, hit_list
;
3776 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3777 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3778 tail
= XCONS (tail
)->cdr
)
3781 overlay
= XCONS (tail
)->car
;
3782 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3785 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3786 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3787 hit_list
= Fcons (overlay
, hit_list
);
3790 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
3791 tail
= XCONS (tail
)->cdr
)
3794 overlay
= XCONS (tail
)->car
;
3795 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3798 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
3799 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3800 hit_list
= Fcons (overlay
, hit_list
);
3802 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
3803 Fdelete_overlay (XCONS (hit_list
)->car
);
3806 /* Somebody has tried to store a value with an unacceptable type
3807 in the slot with offset OFFSET. */
3810 buffer_slot_type_mismatch (offset
)
3815 sym
= *(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
);
3816 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
3818 case Lisp_Int
: type_name
= "integers"; break;
3819 case Lisp_String
: type_name
= "strings"; break;
3820 case Lisp_Symbol
: type_name
= "symbols"; break;
3826 error ("Only %s should be stored in the buffer-local variable %s",
3827 type_name
, XSYMBOL (sym
)->name
->data
);
3833 register Lisp_Object tem
;
3835 buffer_permanent_local_flags
= 0;
3837 /* Make sure all markable slots in buffer_defaults
3838 are initialized reasonably, so mark_buffer won't choke. */
3839 reset_buffer (&buffer_defaults
);
3840 reset_buffer_local_variables (&buffer_defaults
, 1);
3841 reset_buffer (&buffer_local_symbols
);
3842 reset_buffer_local_variables (&buffer_local_symbols
, 1);
3843 /* Prevent GC from getting confused. */
3844 buffer_defaults
.text
= &buffer_defaults
.own_text
;
3845 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
3846 #ifdef USE_TEXT_PROPERTIES
3847 BUF_INTERVALS (&buffer_defaults
) = 0;
3848 BUF_INTERVALS (&buffer_local_symbols
) = 0;
3850 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
3851 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
3853 /* Set up the default values of various buffer slots. */
3854 /* Must do these before making the first buffer! */
3856 /* real setup is done in loaddefs.el */
3857 buffer_defaults
.mode_line_format
= build_string ("%-");
3858 buffer_defaults
.header_line_format
= Qnil
;
3859 buffer_defaults
.abbrev_mode
= Qnil
;
3860 buffer_defaults
.overwrite_mode
= Qnil
;
3861 buffer_defaults
.case_fold_search
= Qt
;
3862 buffer_defaults
.auto_fill_function
= Qnil
;
3863 buffer_defaults
.selective_display
= Qnil
;
3865 buffer_defaults
.selective_display_ellipses
= Qt
;
3867 buffer_defaults
.abbrev_table
= Qnil
;
3868 buffer_defaults
.display_table
= Qnil
;
3869 buffer_defaults
.undo_list
= Qnil
;
3870 buffer_defaults
.mark_active
= Qnil
;
3871 buffer_defaults
.file_format
= Qnil
;
3872 buffer_defaults
.overlays_before
= Qnil
;
3873 buffer_defaults
.overlays_after
= Qnil
;
3874 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
3876 XSETFASTINT (buffer_defaults
.tab_width
, 8);
3877 buffer_defaults
.truncate_lines
= Qnil
;
3878 buffer_defaults
.ctl_arrow
= Qt
;
3879 buffer_defaults
.direction_reversed
= Qnil
;
3882 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
3884 buffer_defaults
.enable_multibyte_characters
= Qt
;
3885 buffer_defaults
.buffer_file_coding_system
= Qnil
;
3886 XSETFASTINT (buffer_defaults
.fill_column
, 70);
3887 XSETFASTINT (buffer_defaults
.left_margin
, 0);
3888 buffer_defaults
.cache_long_line_scans
= Qnil
;
3889 buffer_defaults
.file_truename
= Qnil
;
3890 XSETFASTINT (buffer_defaults
.display_count
, 0);
3891 buffer_defaults
.indicate_empty_lines
= Qnil
;
3892 buffer_defaults
.scroll_up_aggressively
= Qnil
;
3893 buffer_defaults
.scroll_down_aggressively
= Qnil
;
3894 buffer_defaults
.display_time
= Qnil
;
3896 /* Assign the local-flags to the slots that have default values.
3897 The local flag is a bit that is used in the buffer
3898 to say that it has its own local value for the slot.
3899 The local flag bits are in the local_var_flags slot of the buffer. */
3901 /* Nothing can work if this isn't true */
3902 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
3904 /* 0 means not a lisp var, -1 means always local, else mask */
3905 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
3906 XSETINT (buffer_local_flags
.filename
, -1);
3907 XSETINT (buffer_local_flags
.directory
, -1);
3908 XSETINT (buffer_local_flags
.backed_up
, -1);
3909 XSETINT (buffer_local_flags
.save_length
, -1);
3910 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
3911 XSETINT (buffer_local_flags
.read_only
, -1);
3912 XSETINT (buffer_local_flags
.major_mode
, -1);
3913 XSETINT (buffer_local_flags
.mode_name
, -1);
3914 XSETINT (buffer_local_flags
.undo_list
, -1);
3915 XSETINT (buffer_local_flags
.mark_active
, -1);
3916 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
3917 XSETINT (buffer_local_flags
.file_truename
, -1);
3918 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
3919 XSETINT (buffer_local_flags
.file_format
, -1);
3920 XSETINT (buffer_local_flags
.display_count
, -1);
3921 XSETINT (buffer_local_flags
.display_time
, -1);
3922 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
3924 XSETFASTINT (buffer_local_flags
.mode_line_format
, 1);
3925 XSETFASTINT (buffer_local_flags
.abbrev_mode
, 2);
3926 XSETFASTINT (buffer_local_flags
.overwrite_mode
, 4);
3927 XSETFASTINT (buffer_local_flags
.case_fold_search
, 8);
3928 XSETFASTINT (buffer_local_flags
.auto_fill_function
, 0x10);
3929 XSETFASTINT (buffer_local_flags
.selective_display
, 0x20);
3931 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, 0x40);
3933 XSETFASTINT (buffer_local_flags
.tab_width
, 0x80);
3934 XSETFASTINT (buffer_local_flags
.truncate_lines
, 0x100);
3935 XSETFASTINT (buffer_local_flags
.ctl_arrow
, 0x200);
3936 XSETFASTINT (buffer_local_flags
.fill_column
, 0x400);
3937 XSETFASTINT (buffer_local_flags
.left_margin
, 0x800);
3938 XSETFASTINT (buffer_local_flags
.abbrev_table
, 0x1000);
3939 XSETFASTINT (buffer_local_flags
.display_table
, 0x2000);
3941 XSETFASTINT (buffer_local_flags
.buffer_file_type
, 0x4000);
3942 /* Make this one a permanent local. */
3943 buffer_permanent_local_flags
|= 0x4000;
3945 XSETFASTINT (buffer_local_flags
.syntax_table
, 0x8000);
3946 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, 0x10000);
3947 XSETFASTINT (buffer_local_flags
.category_table
, 0x20000);
3948 XSETFASTINT (buffer_local_flags
.direction_reversed
, 0x40000);
3949 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, 0x80000);
3950 /* Make this one a permanent local. */
3951 buffer_permanent_local_flags
|= 0x80000;
3952 XSETFASTINT (buffer_local_flags
.left_margin_width
, 0x100000);
3953 XSETFASTINT (buffer_local_flags
.right_margin_width
, 0x200000);
3954 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, 0x400000);
3955 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, 0x800000);
3956 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, 0x1000000);
3957 XSETFASTINT (buffer_local_flags
.header_line_format
, 0x2000000);
3959 Vbuffer_alist
= Qnil
;
3963 QSFundamental
= build_string ("Fundamental");
3965 Qfundamental_mode
= intern ("fundamental-mode");
3966 buffer_defaults
.major_mode
= Qfundamental_mode
;
3968 Qmode_class
= intern ("mode-class");
3970 Qprotected_field
= intern ("protected-field");
3972 Qpermanent_local
= intern ("permanent-local");
3974 Qkill_buffer_hook
= intern ("kill-buffer-hook");
3976 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
3978 /* super-magic invisible buffer */
3979 Vbuffer_alist
= Qnil
;
3981 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3983 inhibit_modification_hooks
= 0;
3989 char buf
[MAXPATHLEN
+1];
3991 struct stat dotstat
, pwdstat
;
3995 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
3996 if (NILP (buffer_defaults
.enable_multibyte_characters
))
3997 Fset_buffer_multibyte (Qnil
);
3999 /* If PWD is accurate, use it instead of calling getwd. This is faster
4000 when PWD is right, and may avoid a fatal error. */
4001 if ((pwd
= getenv ("PWD")) != 0
4002 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4003 && stat (pwd
, &pwdstat
) == 0
4004 && stat (".", &dotstat
) == 0
4005 && dotstat
.st_ino
== pwdstat
.st_ino
4006 && dotstat
.st_dev
== pwdstat
.st_dev
4007 && strlen (pwd
) < MAXPATHLEN
)
4010 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4011 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4013 else if (getwd (buf
) == 0)
4014 fatal ("`getwd' failed: %s\n", buf
);
4018 /* Maybe this should really use some standard subroutine
4019 whose definition is filename syntax dependent. */
4021 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4023 buf
[rc
] = DIRECTORY_SEP
;
4026 #endif /* not VMS */
4028 current_buffer
->directory
= build_string (buf
);
4030 /* Add /: to the front of the name
4031 if it would otherwise be treated as magic. */
4032 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4034 /* If the default dir is just /, TEMP is non-nil
4035 because of the ange-ftp completion handler.
4036 However, it is not necessary to turn / into /:/.
4037 So avoid doing that. */
4038 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4039 current_buffer
->directory
4040 = concat2 (build_string ("/:"), current_buffer
->directory
);
4042 temp
= get_minibuffer (0);
4043 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4046 /* initialize the buffer routines */
4050 extern Lisp_Object Qdisabled
;
4052 staticpro (&last_overlay_modification_hooks
);
4053 last_overlay_modification_hooks
4054 = Fmake_vector (make_number (10), Qnil
);
4056 staticpro (&Vbuffer_defaults
);
4057 staticpro (&Vbuffer_local_symbols
);
4058 staticpro (&Qfundamental_mode
);
4059 staticpro (&Qmode_class
);
4060 staticpro (&QSFundamental
);
4061 staticpro (&Vbuffer_alist
);
4062 staticpro (&Qprotected_field
);
4063 staticpro (&Qpermanent_local
);
4064 staticpro (&Qkill_buffer_hook
);
4065 Qoverlayp
= intern ("overlayp");
4066 staticpro (&Qoverlayp
);
4067 Qevaporate
= intern ("evaporate");
4068 staticpro (&Qevaporate
);
4069 Qmodification_hooks
= intern ("modification-hooks");
4070 staticpro (&Qmodification_hooks
);
4071 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4072 staticpro (&Qinsert_in_front_hooks
);
4073 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4074 staticpro (&Qinsert_behind_hooks
);
4075 Qget_file_buffer
= intern ("get-file-buffer");
4076 staticpro (&Qget_file_buffer
);
4077 Qpriority
= intern ("priority");
4078 staticpro (&Qpriority
);
4079 Qwindow
= intern ("window");
4080 staticpro (&Qwindow
);
4081 Qbefore_string
= intern ("before-string");
4082 staticpro (&Qbefore_string
);
4083 Qafter_string
= intern ("after-string");
4084 staticpro (&Qafter_string
);
4085 Qfirst_change_hook
= intern ("first-change-hook");
4086 staticpro (&Qfirst_change_hook
);
4087 Qbefore_change_functions
= intern ("before-change-functions");
4088 staticpro (&Qbefore_change_functions
);
4089 Qafter_change_functions
= intern ("after-change-functions");
4090 staticpro (&Qafter_change_functions
);
4092 Fput (Qprotected_field
, Qerror_conditions
,
4093 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4094 Fput (Qprotected_field
, Qerror_message
,
4095 build_string ("Attempt to modify a protected field"));
4097 /* All these use DEFVAR_LISP_NOPRO because the slots in
4098 buffer_defaults will all be marked via Vbuffer_defaults. */
4100 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4101 &buffer_defaults
.mode_line_format
,
4102 "Default value of `mode-line-format' for buffers that don't override it.\n\
4103 This is the same as (default-value 'mode-line-format).");
4105 DEFVAR_LISP_NOPRO ("default-header-line-format",
4106 &buffer_defaults
.header_line_format
,
4107 "Default value of `header-line-format' for buffers that don't override it.\n\
4108 This is the same as (default-value 'header-line-format).");
4110 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4111 &buffer_defaults
.abbrev_mode
,
4112 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4113 This is the same as (default-value 'abbrev-mode).");
4115 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4116 &buffer_defaults
.ctl_arrow
,
4117 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4118 This is the same as (default-value 'ctl-arrow).");
4120 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4121 &buffer_defaults
.direction_reversed
,
4122 "Default value of `direction_reversed' for buffers that do not override it.\n\
4123 This is the same as (default-value 'direction-reversed).");
4125 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4126 &buffer_defaults
.enable_multibyte_characters
,
4127 "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4128 This is the same as (default-value 'enable-multibyte-characters).");
4130 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4131 &buffer_defaults
.buffer_file_coding_system
,
4132 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4133 This is the same as (default-value 'buffer-file-coding-system).");
4135 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4136 &buffer_defaults
.truncate_lines
,
4137 "Default value of `truncate-lines' for buffers that do not override it.\n\
4138 This is the same as (default-value 'truncate-lines).");
4140 DEFVAR_LISP_NOPRO ("default-fill-column",
4141 &buffer_defaults
.fill_column
,
4142 "Default value of `fill-column' for buffers that do not override it.\n\
4143 This is the same as (default-value 'fill-column).");
4145 DEFVAR_LISP_NOPRO ("default-left-margin",
4146 &buffer_defaults
.left_margin
,
4147 "Default value of `left-margin' for buffers that do not override it.\n\
4148 This is the same as (default-value 'left-margin).");
4150 DEFVAR_LISP_NOPRO ("default-tab-width",
4151 &buffer_defaults
.tab_width
,
4152 "Default value of `tab-width' for buffers that do not override it.\n\
4153 This is the same as (default-value 'tab-width).");
4155 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4156 &buffer_defaults
.case_fold_search
,
4157 "Default value of `case-fold-search' for buffers that don't override it.\n\
4158 This is the same as (default-value 'case-fold-search).");
4161 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4162 &buffer_defaults
.buffer_file_type
,
4163 "Default file type for buffers that do not override it.\n\
4164 This is the same as (default-value 'buffer-file-type).\n\
4165 The file type is nil for text, t for binary.");
4168 DEFVAR_LISP_NOPRO ("default-left-margin-width",
4169 &buffer_defaults
.left_margin_width
,
4170 "Default value of `left-margin-width' for buffers that don't override it.\n\
4171 This is the same as (default-value 'left-margin-width).");
4173 DEFVAR_LISP_NOPRO ("default-right-margin-width",
4174 &buffer_defaults
.right_margin_width
,
4175 "Default value of `right_margin_width' for buffers that don't override it.\n\
4176 This is the same as (default-value 'right-margin-width).");
4178 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
4179 &buffer_defaults
.indicate_empty_lines
,
4180 "Default value of `indicate-empty-lines' for buffers that don't override it.\n\
4181 This is the same as (default-value 'indicate-empty-lines).");
4183 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
4184 &buffer_defaults
.scroll_up_aggressively
,
4185 "Default value of `scroll-up-aggressively' for buffers that\n\
4186 don't override it. This is the same as (default-value\n\
4187 'scroll-up-aggressively).");
4189 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
4190 &buffer_defaults
.scroll_down_aggressively
,
4191 "Default value of `scroll-down-aggressively' for buffers that\n\
4192 don't override it. This is the same as (default-value\n\
4193 'scroll-down-aggressively).");
4195 DEFVAR_PER_BUFFER ("header-line-format",
4196 ¤t_buffer
->header_line_format
,
4198 "Analogous to `mode-line-format', but for a mode line displayed\n\
4199 at the top of windows.");
4201 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4204 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4205 But make-docfile finds it!
4206 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4208 "Template for displaying mode line for current buffer.\n\
4209 Each buffer has its own value of this variable.\n\
4210 Value may be nil, a string, a symbol or a list or cons cell.\n\
4211 A value of nil means don't display a mode line.\n\
4212 For a symbol, its value is used (but it is ignored if t or nil).\n\
4213 A string appearing directly as the value of a symbol is processed verbatim\n\
4214 in that the %-constructs below are not recognized.\n\
4215 For a list whose car is a symbol, the symbol's value is taken,\n\
4216 and if that is non-nil, the cadr of the list is processed recursively.\n\
4217 Otherwise, the caddr of the list (if there is one) is processed.\n\
4218 For a list whose car is a string or list, each element is processed\n\
4219 recursively and the results are effectively concatenated.\n\
4220 For a list whose car is an integer, the cdr of the list is processed\n\
4221 and padded (if the number is positive) or truncated (if negative)\n\
4222 to the width specified by that number.\n\
4223 A string is printed verbatim in the mode line except for %-constructs:\n\
4224 (%-constructs are allowed when the string is the entire mode-line-format\n\
4225 or when it is found in a cons-cell or a list)\n\
4226 %b -- print buffer name. %f -- print visited file name.\n\
4227 %F -- print frame name.\n\
4228 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4229 % means buffer is read-only and * means it is modified.\n\
4230 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4231 %s -- print process status. %l -- print the current line number.\n\
4232 %c -- print the current column number (this makes editing slower).\n\
4233 To make the column number update correctly in all cases,\n\
4234 `column-number-mode' must be non-nil.\n\
4235 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4236 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4237 or print Bottom or All.\n\
4238 %n -- print Narrow if appropriate.\n\
4239 %t -- print T if file is text, B if binary.\n\
4240 %[ -- print one [ for each recursive editing level. %] similar.\n\
4241 %% -- print %. %- -- print infinitely many dashes.\n\
4242 Decimal digits after the % specify field width to which to pad.");
4245 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4246 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4247 nil here means use current buffer's major mode.");
4249 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4250 make_number (Lisp_Symbol
),
4251 "Symbol for current buffer's major mode.");
4253 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4254 make_number (Lisp_String
),
4255 "Pretty name of current buffer's major mode (a string).");
4257 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4258 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4259 Automatically becomes buffer-local when set in any fashion.");
4261 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4263 "*Non-nil if searches and matches should ignore case.\n\
4264 Automatically becomes buffer-local when set in any fashion.");
4266 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4267 make_number (Lisp_Int
),
4268 "*Column beyond which automatic line-wrapping should happen.\n\
4269 Automatically becomes buffer-local when set in any fashion.");
4271 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4272 make_number (Lisp_Int
),
4273 "*Column for the default indent-line-function to indent to.\n\
4274 Linefeed indents to this column in Fundamental mode.\n\
4275 Automatically becomes buffer-local when set in any fashion.");
4277 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4278 make_number (Lisp_Int
),
4279 "*Distance between tab stops (for display of tab characters), in columns.\n\
4280 Automatically becomes buffer-local when set in any fashion.");
4282 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4283 "*Non-nil means display control chars with uparrow.\n\
4284 A value of nil means use backslash and octal digits.\n\
4285 Automatically becomes buffer-local when set in any fashion.\n\
4286 This variable does not apply to characters whose display is specified\n\
4287 in the current display table (if there is one).");
4289 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4290 ¤t_buffer
->enable_multibyte_characters
,
4292 "Non-nil means the buffer contents are regarded as multi-byte characters.\n\
4293 Otherwise they are regarded as unibyte. This affects the display,\n\
4294 file I/O and the behavior of various editing commands.\n\
4296 This variable is buffer-local but you cannot set it directly;\n\
4297 use the function `set-buffer-multibyte' to change a buffer's representation.\n\
4298 Changing its default value with `setq-default' is supported.\n\
4299 See also variable `default-enable-multibyte-characters' and Info node\n\
4300 `(elisp)Text Representations'.");
4302 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4303 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4304 "Coding system to be used for encoding the buffer contents on saving.\n\
4305 This variable applies to saving the buffer, and also to `write-region'\n\
4306 and other functions that use `write-region'.\n\
4307 It does not apply to sending output to subprocesses, however.\n\
4309 If this is nil, the buffer is saved without any code conversion\n\
4310 unless some coding system is specified in `file-coding-system-alist'\n\
4311 for the buffer file.\n\
4313 The variable `coding-system-for-write', if non-nil, overrides this variable.\n\
4315 This variable is never applied to a way of decoding\n\
4316 a file while reading it.");
4318 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4320 "*Non-nil means lines in the buffer are displayed right to left.");
4322 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4323 "*Non-nil means do not display continuation lines;\n\
4324 give each line of text one screen line.\n\
4325 Automatically becomes buffer-local when set in any fashion.\n\
4327 Note that this is overridden by the variable\n\
4328 `truncate-partial-width-windows' if that variable is non-nil\n\
4329 and this buffer is not full-frame width.");
4332 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4334 "Non-nil if the visited file is a binary file.\n\
4335 This variable is meaningful on MS-DOG and Windows NT.\n\
4336 On those systems, it is automatically local in every buffer.\n\
4337 On other systems, this variable is normally always nil.");
4340 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4341 make_number (Lisp_String
),
4342 "Name of default directory of current buffer. Should end with slash.\n\
4343 Each buffer has its own value of this variable.");
4345 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4347 "Function called (if non-nil) to perform auto-fill.\n\
4348 It is called after self-inserting a space or newline.\n\
4349 Each buffer has its own value of this variable.\n\
4350 NOTE: This variable is not a hook;\n\
4351 its value may not be a list of functions.");
4353 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4354 make_number (Lisp_String
),
4355 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4356 Each buffer has its own value of this variable.");
4358 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4359 make_number (Lisp_String
),
4360 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4361 The truename of a file is calculated by `file-truename'\n\
4362 and then abbreviated with `abbreviate-file-name'.\n\
4363 Each buffer has its own value of this variable.");
4365 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4366 ¤t_buffer
->auto_save_file_name
,
4367 make_number (Lisp_String
),
4368 "Name of file for auto-saving current buffer,\n\
4369 or nil if buffer should not be auto-saved.\n\
4370 Each buffer has its own value of this variable.");
4372 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4373 "Non-nil if this buffer is read-only.\n\
4374 Each buffer has its own value of this variable.");
4376 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4377 "Non-nil if this buffer's file has been backed up.\n\
4378 Backing up is done before the first time the file is saved.\n\
4379 Each buffer has its own value of this variable.");
4381 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4382 make_number (Lisp_Int
),
4383 "Length of current buffer when last read in, saved or auto-saved.\n\
4385 Each buffer has its own value of this variable.");
4387 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4389 "Non-nil enables selective display:\n\
4390 Integer N as value means display only lines\n\
4391 that start with less than n columns of space.\n\
4392 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4393 Then ^M's in the file are written into files as newlines.\n\n\
4394 Automatically becomes buffer-local when set in any fashion.");
4397 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4398 ¤t_buffer
->selective_display_ellipses
,
4400 "t means display ... on previous line when a line is invisible.\n\
4401 Automatically becomes buffer-local when set in any fashion.");
4404 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4405 "Non-nil if self-insertion should replace existing text.\n\
4406 The value should be one of `overwrite-mode-textual',\n\
4407 `overwrite-mode-binary', or nil.\n\
4408 If it is `overwrite-mode-textual', self-insertion still\n\
4409 inserts at the end of a line, and inserts when point is before a tab,\n\
4410 until the tab is filled in.\n\
4411 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4412 Automatically becomes buffer-local when set in any fashion.");
4414 #if 0 /* The doc string is too long for some compilers,
4415 but make-docfile can find it in this comment. */
4416 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4418 "Display table that controls display of the contents of current buffer.\n\
4419 Automatically becomes buffer-local when set in any fashion.\n\
4420 The display table is a char-table created with `make-display-table'.\n\
4421 The ordinary char-table elements control how to display each possible text\n\
4422 character. Each value should be a vector of characters or nil;\n\
4423 nil means display the character in the default fashion.\n\
4424 There are six extra slots to control the display of\n\
4425 the end of a truncated screen line (extra-slot 0, a single character);\n\
4426 the end of a continued line (extra-slot 1, a single character);\n\
4427 the escape character used to display character codes in octal\n\
4428 (extra-slot 2, a single character);\n\
4429 the character used as an arrow for control characters (extra-slot 3,\n\
4430 a single character);\n\
4431 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4432 a vector of characters);\n\
4433 the character used to draw the border between side-by-side windows\n\
4434 (extra-slot 5, a single character).\n\
4435 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4436 If this variable is nil, the value of `standard-display-table' is used.\n\
4437 Each window can have its own, overriding display table.");
4439 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4442 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
4444 "*Width of left marginal area for display of a buffer.\n\
4445 Automatically becomes buffer-local when set in any fashion.\n\
4446 A value of nil means no marginal area.");
4448 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
4450 "*Width of right marginal area for display of a buffer.\n\
4451 Automatically becomes buffer-local when set in any fashion.\n\
4452 A value of nil means no marginal area.");
4454 DEFVAR_PER_BUFFER ("indicate-empty-lines",
4455 ¤t_buffer
->indicate_empty_lines
, Qnil
,
4456 "*Non-nil means visually indicate lines not displaying text.\n\
4457 Automatically becomes buffer-local when set in any fashion.\n");
4459 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
4460 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
4461 "*If a number, scroll display up aggressively.\n\
4462 If scrolling a window because point is above the window start, choose\n\
4463 a new window start so that point ends up that fraction of the window's\n\
4464 height from the bottom of the window.\n\
4465 Automatically becomes buffer-local when set in any fashion.");
4467 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
4468 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
4469 "*If a number, scroll display down aggressively.\n\
4470 If scrolling a window because point is below the window end, choose\n\
4471 a new window start so that point ends up that fraction of the window's\n\
4472 height from the top of the window.\n\
4473 Automatically becomes buffer-local when set in any fashion.");
4475 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4478 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
4479 "If non-nil, a function to call before each text change (obsolete).\n\
4480 Two arguments are passed to the function: the positions of\n\
4481 the beginning and end of the range of old text to be changed.\n\
4482 \(For an insertion, the beginning and end are at the same place.)\n\
4483 No information is given about the length of the text after the change.\n\
4485 Buffer changes made while executing the `before-change-function'\n\
4486 don't call any before-change or after-change functions.\n\
4487 That's because these variables are temporarily set to nil.\n\
4488 As a result, a hook function cannot straightforwardly alter the value of\n\
4489 these variables. See the Emacs Lisp manual for a way of\n\
4490 accomplishing an equivalent result by using other variables.\n\n\
4491 This variable is obsolete; use `before-change-functions' instead.");
4492 Vbefore_change_function
= Qnil
;
4494 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
4495 "If non-nil, a Function to call after each text change (obsolete).\n\
4496 Three arguments are passed to the function: the positions of\n\
4497 the beginning and end of the range of changed text,\n\
4498 and the length of the pre-change text replaced by that range.\n\
4499 \(For an insertion, the pre-change length is zero;\n\
4500 for a deletion, that length is the number of bytes deleted,\n\
4501 and the post-change beginning and end are at the same place.)\n\
4503 Buffer changes made while executing the `after-change-function'\n\
4504 don't call any before-change or after-change functions.\n\
4505 That's because these variables are temporarily set to nil.\n\
4506 As a result, a hook function cannot straightforwardly alter the value of\n\
4507 these variables. See the Emacs Lisp manual for a way of\n\
4508 accomplishing an equivalent result by using other variables.\n\n\
4509 This variable is obsolete; use `after-change-functions' instead.");
4510 Vafter_change_function
= Qnil
;
4512 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4513 "List of functions to call before each text change.\n\
4514 Two arguments are passed to each function: the positions of\n\
4515 the beginning and end of the range of old text to be changed.\n\
4516 \(For an insertion, the beginning and end are at the same place.)\n\
4517 No information is given about the length of the text after the change.\n\
4519 Buffer changes made while executing the `before-change-functions'\n\
4520 don't call any before-change or after-change functions.\n\
4521 That's because these variables are temporarily set to nil.\n\
4522 As a result, a hook function cannot straightforwardly alter the value of\n\
4523 these variables. See the Emacs Lisp manual for a way of\n\
4524 accomplishing an equivalent result by using other variables.\n\
4526 If an unhandled error happens in running these functions,\n\
4527 the variable's value remains nil. That prevents the error\n\
4528 from happening repeatedly and making Emacs nonfunctional.");
4529 Vbefore_change_functions
= Qnil
;
4531 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4532 "List of function to call after each text change.\n\
4533 Three arguments are passed to each function: the positions of\n\
4534 the beginning and end of the range of changed text,\n\
4535 and the length in bytes of the pre-change text replaced by that range.\n\
4536 \(For an insertion, the pre-change length is zero;\n\
4537 for a deletion, that length is the number of bytes deleted,\n\
4538 and the post-change beginning and end are at the same place.)\n\
4540 Buffer changes made while executing the `after-change-functions'\n\
4541 don't call any before-change or after-change functions.\n\
4542 That's because these variables are temporarily set to nil.\n\
4543 As a result, a hook function cannot straightforwardly alter the value of\n\
4544 these variables. See the Emacs Lisp manual for a way of\n\
4545 accomplishing an equivalent result by using other variables.\n\
4547 If an unhandled error happens in running these functions,\n\
4548 the variable's value remains nil. That prevents the error\n\
4549 from happening repeatedly and making Emacs nonfunctional.");
4550 Vafter_change_functions
= Qnil
;
4552 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4553 "A list of functions to call before changing a buffer which is unmodified.\n\
4554 The functions are run using the `run-hooks' function.");
4555 Vfirst_change_hook
= Qnil
;
4557 #if 0 /* The doc string is too long for some compilers,
4558 but make-docfile can find it in this comment. */
4559 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4560 "List of undo entries in current buffer.\n\
4561 This variable is always local in all buffers.\n\
4562 Recent changes come first; older changes follow newer.\n\
4564 An entry (BEG . END) represents an insertion which begins at\n\
4565 position BEG and ends at position END.\n\
4567 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4568 from (abs POSITION). If POSITION is positive, point was at the front\n\
4569 of the text being deleted; if negative, point was at the end.\n\
4571 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4572 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4573 of the visited file's modification time, as of that time. If the\n\
4574 modification time of the most recent save is different, this entry is\n\
4577 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4578 was modified between BEG and END. PROPERTY is the property name,\n\
4579 and VALUE is the old value.\n\
4581 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4582 was adjusted in position by the offset DISTANCE (an integer).\n\
4584 An entry of the form POSITION indicates that point was at the buffer\n\
4585 location given by the integer. Undoing an entry of this form places\n\
4586 point at POSITION.\n\
4588 nil marks undo boundaries. The undo command treats the changes\n\
4589 between two undo boundaries as a single step to be undone.\n\
4591 If the value of the variable is t, undo information is not recorded.");
4593 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4596 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4597 "Non-nil means the mark and region are currently active in this buffer.\n\
4598 Automatically local in all buffers.");
4600 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4601 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4602 This variable is buffer-local, in all buffers.\n\
4604 Normally, the line-motion functions work by scanning the buffer for\n\
4605 newlines. Columnar operations (like move-to-column and\n\
4606 compute-motion) also work by scanning the buffer, summing character\n\
4607 widths as they go. This works well for ordinary text, but if the\n\
4608 buffer's lines are very long (say, more than 500 characters), these\n\
4609 motion functions will take longer to execute. Emacs may also take\n\
4610 longer to update the display.\n\
4612 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4613 results of their scans, and consult the cache to avoid rescanning\n\
4614 regions of the buffer until the text is modified. The caches are most\n\
4615 beneficial when they prevent the most searching---that is, when the\n\
4616 buffer contains long lines and large regions of characters with the\n\
4617 same, fixed screen width.\n\
4619 When cache-long-line-scans is non-nil, processing short lines will\n\
4620 become slightly slower (because of the overhead of consulting the\n\
4621 cache), and the caches will use memory roughly proportional to the\n\
4622 number of newlines and characters whose screen width varies.\n\
4624 The caches require no explicit maintenance; their accuracy is\n\
4625 maintained internally by the Emacs primitives. Enabling or disabling\n\
4626 the cache should not affect the behavior of any of the motion\n\
4627 functions; it should only affect their performance.");
4629 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4630 "Value of point before the last series of scroll operations, or nil.\n\
4631 This variable is always local in all buffers.");
4633 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4634 "List of formats to use when saving this buffer.\n\
4635 This variable is always local in all buffers.\n\
4636 Formats are defined by `format-alist'. This variable is\n\
4637 set when a file is visited. Automatically local in all buffers.");
4639 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4640 ¤t_buffer
->invisibility_spec
, Qnil
,
4641 "Invisibility spec of this buffer.\n\
4642 This variable is always local in all buffers.\n\
4643 The default is t, which means that text is invisible\n\
4644 if it has a non-nil `invisible' property.\n\
4645 If the value is a list, a text character is invisible if its `invisible'\n\
4646 property is an element in that list.\n\
4647 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4648 then characters with property value PROP are invisible,\n\
4649 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4651 DEFVAR_PER_BUFFER ("buffer-display-count",
4652 ¤t_buffer
->display_count
, Qnil
,
4653 "A number incremented each time this buffer is displayed in a window.\n\
4654 This variable is always local in all buffers.\n\
4655 The function `set-window-buffer increments it.");
4657 DEFVAR_PER_BUFFER ("buffer-display-time",
4658 ¤t_buffer
->display_time
, Qnil
,
4659 "Time stamp updated each time this buffer is displayed in a window.\n\
4660 This variable is always local in all buffers.\n\
4661 The function `set-window-buffer' updates this variable\n\
4662 to the value obtained by calling `current-time'.\n\
4663 If the buffer has never been shown in a window, the value is nil.");
4665 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4666 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4667 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4668 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4669 all windows or just the selected window.");
4670 Vtransient_mark_mode
= Qnil
;
4672 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4673 "*Non-nil means disregard read-only status of buffers or characters.\n\
4674 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4675 text properties. If the value is a list, disregard `buffer-read-only'\n\
4676 and disregard a `read-only' text property if the property value\n\
4677 is a member of the list.");
4678 Vinhibit_read_only
= Qnil
;
4680 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4681 "List of functions called with no args to query before killing a buffer.");
4682 Vkill_buffer_query_functions
= Qnil
;
4684 defsubr (&Sbuffer_live_p
);
4685 defsubr (&Sbuffer_list
);
4686 defsubr (&Sget_buffer
);
4687 defsubr (&Sget_file_buffer
);
4688 defsubr (&Sget_buffer_create
);
4689 defsubr (&Smake_indirect_buffer
);
4690 defsubr (&Sgenerate_new_buffer_name
);
4691 defsubr (&Sbuffer_name
);
4692 /*defsubr (&Sbuffer_number);*/
4693 defsubr (&Sbuffer_file_name
);
4694 defsubr (&Sbuffer_base_buffer
);
4695 defsubr (&Sbuffer_local_variables
);
4696 defsubr (&Sbuffer_modified_p
);
4697 defsubr (&Sset_buffer_modified_p
);
4698 defsubr (&Sbuffer_modified_tick
);
4699 defsubr (&Srename_buffer
);
4700 defsubr (&Sother_buffer
);
4701 defsubr (&Sbuffer_disable_undo
);
4702 defsubr (&Sbuffer_enable_undo
);
4703 defsubr (&Skill_buffer
);
4704 defsubr (&Sset_buffer_major_mode
);
4705 defsubr (&Sswitch_to_buffer
);
4706 defsubr (&Spop_to_buffer
);
4707 defsubr (&Scurrent_buffer
);
4708 defsubr (&Sset_buffer
);
4709 defsubr (&Sbarf_if_buffer_read_only
);
4710 defsubr (&Sbury_buffer
);
4711 defsubr (&Serase_buffer
);
4712 defsubr (&Sset_buffer_multibyte
);
4713 defsubr (&Skill_all_local_variables
);
4715 defsubr (&Soverlayp
);
4716 defsubr (&Smake_overlay
);
4717 defsubr (&Sdelete_overlay
);
4718 defsubr (&Smove_overlay
);
4719 defsubr (&Soverlay_start
);
4720 defsubr (&Soverlay_end
);
4721 defsubr (&Soverlay_buffer
);
4722 defsubr (&Soverlay_properties
);
4723 defsubr (&Soverlays_at
);
4724 defsubr (&Soverlays_in
);
4725 defsubr (&Snext_overlay_change
);
4726 defsubr (&Sprevious_overlay_change
);
4727 defsubr (&Soverlay_recenter
);
4728 defsubr (&Soverlay_lists
);
4729 defsubr (&Soverlay_get
);
4730 defsubr (&Soverlay_put
);
4736 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4737 initial_define_key (control_x_map
, 'k', "kill-buffer");
4739 /* This must not be in syms_of_buffer, because Qdisabled is not
4740 initialized when that function gets called. */
4741 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);