1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
24 #include <sys/param.h>
27 /* in 4.1, param.h fails to define this. */
28 #define MAXPATHLEN 1024
29 #endif /* not MAXPATHLEN */
33 #include "intervals.h"
38 #include "blockinput.h"
40 struct buffer
*current_buffer
; /* the current buffer */
42 /* First buffer in chain of all buffers (in reverse order of creation).
43 Threaded through ->next. */
45 struct buffer
*all_buffers
;
47 /* This structure holds the default values of the buffer-local variables
48 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
49 The default value occupies the same slot in this structure
50 as an individual buffer's value occupies in that buffer.
51 Setting the default value also goes through the alist of buffers
52 and stores into each buffer that does not say it has a local value. */
54 struct buffer buffer_defaults
;
56 /* A Lisp_Object pointer to the above, used for staticpro */
58 static Lisp_Object Vbuffer_defaults
;
60 /* This structure marks which slots in a buffer have corresponding
61 default values in buffer_defaults.
62 Each such slot has a nonzero value in this structure.
63 The value has only one nonzero bit.
65 When a buffer has its own local value for a slot,
66 the bit for that slot (found in the same slot in this structure)
67 is turned on in the buffer's local_var_flags slot.
69 If a slot in this structure is -1, then even though there may
70 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
71 and the corresponding slot in buffer_defaults is not used.
73 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
74 but there is a default value which is copied into each buffer.
76 If a slot in this structure is negative, then even though there may
77 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
78 and the corresponding slot in buffer_defaults is not used.
80 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
81 zero, that is a bug */
83 struct buffer buffer_local_flags
;
85 /* This structure holds the names of symbols whose values may be
86 buffer-local. It is indexed and accessed in the same way as the above. */
88 struct buffer buffer_local_symbols
;
89 /* A Lisp_Object pointer to the above, used for staticpro */
90 static Lisp_Object Vbuffer_local_symbols
;
92 /* This structure holds the required types for the values in the
93 buffer-local slots. If a slot contains Qnil, then the
94 corresponding buffer slot may contain a value of any type. If a
95 slot contains an integer, then prospective values' tags must be
96 equal to that integer. When a tag does not match, the function
97 buffer_slot_type_mismatch will signal an error. */
98 struct buffer buffer_local_types
;
100 Lisp_Object
Fset_buffer ();
101 void set_buffer_internal ();
102 static void call_overlay_mod_hooks ();
104 /* Alist of all buffer names vs the buffers. */
105 /* This used to be a variable, but is no longer,
106 to prevent lossage due to user rplac'ing this alist or its elements. */
107 Lisp_Object Vbuffer_alist
;
109 /* Functions to call before and after each text change. */
110 Lisp_Object Vbefore_change_function
;
111 Lisp_Object Vafter_change_function
;
112 Lisp_Object Vbefore_change_functions
;
113 Lisp_Object Vafter_change_functions
;
115 Lisp_Object Vtransient_mark_mode
;
117 /* t means ignore all read-only text properties.
118 A list means ignore such a property if its value is a member of the list.
119 Any non-nil value means ignore buffer-read-only. */
120 Lisp_Object Vinhibit_read_only
;
122 /* List of functions to call that can query about killing a buffer.
123 If any of these functions returns nil, we don't kill it. */
124 Lisp_Object Vkill_buffer_query_functions
;
126 /* List of functions to call before changing an unmodified buffer. */
127 Lisp_Object Vfirst_change_hook
;
128 Lisp_Object Qfirst_change_hook
;
130 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
132 Lisp_Object Qprotected_field
;
134 Lisp_Object QSFundamental
; /* A string "Fundamental" */
136 Lisp_Object Qkill_buffer_hook
;
138 Lisp_Object Qget_file_buffer
;
140 Lisp_Object Qoverlayp
;
142 Lisp_Object Qpriority
, Qwindow
, Qevaporate
;
144 Lisp_Object Qmodification_hooks
;
145 Lisp_Object Qinsert_in_front_hooks
;
146 Lisp_Object Qinsert_behind_hooks
;
148 /* For debugging; temporary. See set_buffer_internal. */
149 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
155 error ("No buffer named %s", XSTRING (spec
)->data
);
156 error ("Invalid buffer argument");
159 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
160 "Return a list of all existing live buffers.")
163 return Fmapcar (Qcdr
, Vbuffer_alist
);
166 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
167 "Return the buffer named NAME (a string).\n\
168 If there is no live buffer named NAME, return nil.\n\
169 NAME may also be a buffer; if so, the value is that buffer.")
171 register Lisp_Object name
;
175 CHECK_STRING (name
, 0);
177 return Fcdr (Fassoc (name
, Vbuffer_alist
));
180 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
181 "Return the buffer visiting file FILENAME (a string).\n\
182 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
183 If there is no such live buffer, return nil.\n\
184 See also `find-buffer-visiting'.")
186 register Lisp_Object filename
;
188 register Lisp_Object tail
, buf
, tem
;
191 CHECK_STRING (filename
, 0);
192 filename
= Fexpand_file_name (filename
, Qnil
);
194 /* If the file name has special constructs in it,
195 call the corresponding file handler. */
196 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
198 return call2 (handler
, Qget_file_buffer
, filename
);
200 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
202 buf
= Fcdr (XCONS (tail
)->car
);
203 if (!BUFFERP (buf
)) continue;
204 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
205 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
212 /* Incremented for each buffer created, to assign the buffer number. */
215 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
216 "Return the buffer named NAME, or create such a buffer and return it.\n\
217 A new buffer is created if there is no live buffer named NAME.\n\
218 If NAME starts with a space, the new buffer does not keep undo information.\n\
219 If NAME is a buffer instead of a string, then it is the value returned.\n\
220 The value is never nil.")
222 register Lisp_Object name
;
224 register Lisp_Object buf
, function
, tem
;
225 int count
= specpdl_ptr
- specpdl
;
226 register struct buffer
*b
;
228 buf
= Fget_buffer (name
);
232 if (XSTRING (name
)->size
== 0)
233 error ("Empty string for buffer name is not allowed");
235 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
237 BUF_GAP_SIZE (b
) = 20;
239 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
241 if (! BUF_BEG_ADDR (b
))
251 /* Put this on the chain of all buffers including killed ones. */
252 b
->next
= all_buffers
;
255 b
->mark
= Fmake_marker ();
256 /*b->number = make_number (++buffer_count);*/
258 if (XSTRING (name
)->data
[0] != ' ')
264 reset_buffer_local_variables (b
);
266 /* Put this in the alist of all live buffers. */
267 XSET (buf
, Lisp_Buffer
, b
);
268 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
270 b
->mark
= Fmake_marker ();
274 function
= buffer_defaults
.major_mode
;
277 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
279 function
= current_buffer
->major_mode
;
282 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
285 /* To select a nonfundamental mode,
286 select the buffer temporarily and then call the mode function. */
288 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
293 return unbind_to (count
, buf
);
296 /* Reinitialize everything about a buffer except its name and contents
297 and local variables. */
301 register struct buffer
*b
;
304 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
306 b
->save_modified
= 1;
307 XFASTINT (b
->save_length
) = 0;
308 b
->last_window_start
= 1;
310 b
->auto_save_modified
= 0;
311 b
->auto_save_failure_time
= -1;
312 b
->auto_save_file_name
= Qnil
;
314 b
->overlays_before
= Qnil
;
315 b
->overlays_after
= Qnil
;
316 XFASTINT (b
->overlay_center
) = 1;
317 b
->mark_active
= Qnil
;
319 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
320 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
323 /* Reset buffer B's local variables info.
324 Don't use this on a buffer that has already been in use;
325 it does not treat permanent locals consistently.
326 Instead, use Fkill_all_local_variables. */
328 reset_buffer_local_variables (b
)
329 register struct buffer
*b
;
333 /* Reset the major mode to Fundamental, together with all the
334 things that depend on the major mode.
335 default-major-mode is handled at a higher level.
336 We ignore it here. */
337 b
->major_mode
= Qfundamental_mode
;
339 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
340 b
->mode_name
= QSFundamental
;
341 b
->minor_modes
= Qnil
;
342 b
->downcase_table
= Vascii_downcase_table
;
343 b
->upcase_table
= Vascii_upcase_table
;
344 b
->case_canon_table
= Vascii_canon_table
;
345 b
->case_eqv_table
= Vascii_eqv_table
;
347 b
->sort_table
= XSTRING (Vascii_sort_table
);
348 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
351 /* Reset all per-buffer variables to their defaults. */
352 b
->local_var_alist
= Qnil
;
353 b
->local_var_flags
= 0;
355 /* For each slot that has a default value,
356 copy that into the slot. */
358 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
359 offset
< sizeof (struct buffer
);
360 offset
+= sizeof (Lisp_Object
)) /* sizeof EMACS_INT == sizeof Lisp_Object */
361 if (*(EMACS_INT
*)(offset
+ (char *) &buffer_local_flags
) > 0
362 || *(EMACS_INT
*)(offset
+ (char *) &buffer_local_flags
) == -2)
363 *(Lisp_Object
*)(offset
+ (char *)b
) =
364 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
367 /* We split this away from generate-new-buffer, because rename-buffer
368 and set-visited-file-name ought to be able to use this to really
369 rename the buffer properly. */
371 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
373 "Return a string that is the name of no existing buffer based on NAME.\n\
374 If there is no live buffer named NAME, then return NAME.\n\
375 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
376 until an unused name is found, and then return that name.\n\
377 Optional second argument IGNORE specifies a name that is okay to use\n\
378 \(if it is in the sequence to be tried)\n\
379 even if a buffer with that name exists.")
381 register Lisp_Object name
, ignore
;
383 register Lisp_Object gentemp
, tem
;
387 CHECK_STRING (name
, 0);
389 tem
= Fget_buffer (name
);
396 sprintf (number
, "<%d>", ++count
);
397 gentemp
= concat2 (name
, build_string (number
));
398 tem
= Fstring_equal (gentemp
, ignore
);
401 tem
= Fget_buffer (gentemp
);
408 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
409 "Return the name of BUFFER, as a string.\n\
410 With no argument or nil as argument, return the name of the current buffer.")
412 register Lisp_Object buffer
;
415 return current_buffer
->name
;
416 CHECK_BUFFER (buffer
, 0);
417 return XBUFFER (buffer
)->name
;
420 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
421 "Return name of file BUFFER is visiting, or nil if none.\n\
422 No argument or nil as argument means use the current buffer.")
424 register Lisp_Object buffer
;
427 return current_buffer
->filename
;
428 CHECK_BUFFER (buffer
, 0);
429 return XBUFFER (buffer
)->filename
;
432 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
433 Sbuffer_local_variables
, 0, 1, 0,
434 "Return an alist of variables that are buffer-local in BUFFER.\n\
435 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
436 For a symbol that is locally unbound, just the symbol appears in the value.\n\
437 Note that storing new VALUEs in these elements doesn't change the variables.\n\
438 No argument or nil as argument means use current buffer as BUFFER.")
440 register Lisp_Object buffer
;
442 register struct buffer
*buf
;
443 register Lisp_Object result
;
446 buf
= current_buffer
;
449 CHECK_BUFFER (buffer
, 0);
450 buf
= XBUFFER (buffer
);
456 /* Reference each variable in the alist in our current buffer.
457 If inquiring about the current buffer, this gets the current values,
458 so store them into the alist so the alist is up to date.
459 If inquiring about some other buffer, this swaps out any values
460 for that buffer, making the alist up to date automatically. */
461 register Lisp_Object tail
;
462 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
464 Lisp_Object val
, elt
;
466 elt
= XCONS (tail
)->car
;
468 if (buf
== current_buffer
)
469 val
= find_symbol_value (XCONS (elt
)->car
);
471 val
= XCONS (elt
)->cdr
;
473 /* If symbol is unbound, put just the symbol in the list. */
474 if (EQ (val
, Qunbound
))
475 result
= Fcons (XCONS (elt
)->car
, result
);
476 /* Otherwise, put (symbol . value) in the list. */
478 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
482 /* Add on all the variables stored in special slots. */
484 register int offset
, mask
;
486 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
487 offset
< sizeof (struct buffer
);
488 offset
+= (sizeof (EMACS_INT
))) /* sizeof EMACS_INT == sizeof Lisp_Object */
490 mask
= *(EMACS_INT
*)(offset
+ (char *) &buffer_local_flags
);
491 if (mask
== -1 || (buf
->local_var_flags
& mask
))
492 if (SYMBOLP (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
)))
493 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
494 *(Lisp_Object
*)(offset
+ (char *)buf
)),
503 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
505 "Return t if BUFFER was modified since its file was last read or saved.\n\
506 No argument or nil as argument means use current buffer as BUFFER.")
508 register Lisp_Object buffer
;
510 register struct buffer
*buf
;
512 buf
= current_buffer
;
515 CHECK_BUFFER (buffer
, 0);
516 buf
= XBUFFER (buffer
);
519 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
522 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
524 "Mark current buffer as modified or unmodified according to FLAG.\n\
525 A non-nil FLAG means mark the buffer modified.")
527 register Lisp_Object flag
;
529 register int already
;
530 register Lisp_Object fn
;
532 #ifdef CLASH_DETECTION
533 /* If buffer becoming modified, lock the file.
534 If buffer becoming unmodified, unlock the file. */
536 fn
= current_buffer
->filename
;
539 already
= current_buffer
->save_modified
< MODIFF
;
540 if (!already
&& !NILP (flag
))
542 else if (already
&& NILP (flag
))
545 #endif /* CLASH_DETECTION */
547 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
552 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
554 "Return BUFFER's tick counter, incremented for each change in text.\n\
555 Each buffer has a tick counter which is incremented each time the text in\n\
556 that buffer is changed. It wraps around occasionally.\n\
557 No argument or nil as argument means use current buffer as BUFFER.")
559 register Lisp_Object buffer
;
561 register struct buffer
*buf
;
563 buf
= current_buffer
;
566 CHECK_BUFFER (buffer
, 0);
567 buf
= XBUFFER (buffer
);
570 return make_number (BUF_MODIFF (buf
));
573 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
574 "sRename buffer (to new name): \nP",
575 "Change current buffer's name to NEWNAME (a string).\n\
576 If second arg UNIQUE is nil or omitted, it is an error if a\n\
577 buffer named NEWNAME already exists.\n\
578 If UNIQUE is non-nil, come up with a new name using\n\
579 `generate-new-buffer-name'.\n\
580 Interactively, you can set UNIQUE with a prefix argument.\n\
581 We return the name we actually gave the buffer.\n\
582 This does not change the name of the visited file (if any).")
584 register Lisp_Object name
, unique
;
586 register Lisp_Object tem
, buf
;
588 CHECK_STRING (name
, 0);
590 if (XSTRING (name
)->size
== 0)
591 error ("Empty string is invalid as a buffer name");
593 tem
= Fget_buffer (name
);
594 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
595 the buffer automatically so you can create another with the original name.
596 It makes UNIQUE equivalent to
597 (rename-buffer (generate-new-buffer-name NAME)). */
598 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
599 return current_buffer
->name
;
603 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
605 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
608 current_buffer
->name
= name
;
610 /* Catch redisplay's attention. Unless we do this, the mode lines for
611 any windows displaying current_buffer will stay unchanged. */
614 XSET (buf
, Lisp_Buffer
, current_buffer
);
615 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
616 if (NILP (current_buffer
->filename
)
617 && !NILP (current_buffer
->auto_save_file_name
))
618 call0 (intern ("rename-auto-save-file"));
619 /* refetch since that last call may have done GC */
620 return current_buffer
->name
;
623 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
624 "Return most recently selected buffer other than BUFFER.\n\
625 Buffers not visible in windows are preferred to visible buffers,\n\
626 unless optional second argument VISIBLE-OK is non-nil.\n\
627 If no other buffer exists, the buffer `*scratch*' is returned.\n\
628 If BUFFER is omitted or nil, some interesting buffer is returned.")
630 register Lisp_Object buffer
, visible_ok
;
632 register Lisp_Object tail
, buf
, notsogood
, tem
;
635 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
637 buf
= Fcdr (Fcar (tail
));
638 if (EQ (buf
, buffer
))
640 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
642 if (NILP (visible_ok
))
643 tem
= Fget_buffer_window (buf
, Qt
);
648 if (NILP (notsogood
))
651 if (!NILP (notsogood
))
653 return Fget_buffer_create (build_string ("*scratch*"));
656 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 0, 1,
658 "Make BUFFER stop keeping undo information.\n\
659 No argument or nil as argument means do this for the current buffer.")
661 register Lisp_Object buffer
;
663 Lisp_Object real_buffer
;
666 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
669 real_buffer
= Fget_buffer (buffer
);
670 if (NILP (real_buffer
))
674 XBUFFER (real_buffer
)->undo_list
= Qt
;
679 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
681 "Start keeping undo information for buffer BUFFER.\n\
682 No argument or nil as argument means do this for the current buffer.")
684 register Lisp_Object buffer
;
686 Lisp_Object real_buffer
;
689 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
692 real_buffer
= Fget_buffer (buffer
);
693 if (NILP (real_buffer
))
697 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
698 XBUFFER (real_buffer
)->undo_list
= Qnil
;
704 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
705 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
706 The buffer being killed will be current while the hook is running.\n\
709 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
710 "Kill the buffer BUFFER.\n\
711 The argument may be a buffer or may be the name of a buffer.\n\
712 An argument of nil means kill the current buffer.\n\n\
713 Value is t if the buffer is actually killed, nil if user says no.\n\n\
714 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
715 if not void, is a list of functions to be called, with no arguments,\n\
716 before the buffer is actually killed. The buffer to be killed is current\n\
717 when the hook functions are called.\n\n\
718 Any processes that have this buffer as the `process-buffer' are killed\n\
719 with `delete-process'.")
724 register struct buffer
*b
;
725 register Lisp_Object tem
;
726 register struct Lisp_Marker
*m
;
727 struct gcpro gcpro1
, gcpro2
;
730 buf
= Fcurrent_buffer ();
732 buf
= Fget_buffer (bufname
);
738 /* Query if the buffer is still modified. */
739 if (INTERACTIVE
&& !NILP (b
->filename
)
740 && BUF_MODIFF (b
) > b
->save_modified
)
742 GCPRO2 (buf
, bufname
);
743 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
744 XSTRING (b
->name
)->data
));
750 /* Run hooks with the buffer to be killed the current buffer. */
752 register Lisp_Object val
;
753 int count
= specpdl_ptr
- specpdl
;
756 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
757 set_buffer_internal (b
);
759 /* First run the query functions; if any query is answered no,
760 don't kill the buffer. */
761 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
763 tem
= call0 (Fcar (list
));
765 return unbind_to (count
, Qnil
);
768 /* Then run the hooks. */
769 if (!NILP (Vrun_hooks
))
770 call1 (Vrun_hooks
, Qkill_buffer_hook
);
771 unbind_to (count
, Qnil
);
774 /* We have no more questions to ask. Verify that it is valid
775 to kill the buffer. This must be done after the questions
776 since anything can happen within do_yes_or_no_p. */
778 /* Don't kill the minibuffer now current. */
779 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
785 /* Make this buffer not be current.
786 In the process, notice if this is the sole visible buffer
787 and give up if so. */
788 if (b
== current_buffer
)
790 tem
= Fother_buffer (buf
, Qnil
);
792 if (b
== current_buffer
)
796 /* Now there is no question: we can kill the buffer. */
798 #ifdef CLASH_DETECTION
799 /* Unlock this buffer's file, if it is locked. */
801 #endif /* CLASH_DETECTION */
803 kill_buffer_processes (buf
);
807 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
808 Freplace_buffer_in_windows (buf
);
811 /* Delete any auto-save file, if we saved it in this session. */
812 if (STRINGP (b
->auto_save_file_name
)
813 && b
->auto_save_modified
!= 0)
816 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
818 unlink (XSTRING (b
->auto_save_file_name
)->data
);
821 /* Unchain all markers of this buffer
822 and leave them pointing nowhere. */
823 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
832 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
833 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
834 /* Perhaps we should explicitly free the interval tree here... */
838 BUFFER_FREE (BUF_BEG_ADDR (b
));
845 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
846 we do this each time BUF is selected visibly, the more recently
847 selected buffers are always closer to the front of the list. This
848 means that other_buffer is more likely to choose a relevant buffer. */
853 register Lisp_Object link
, prev
;
856 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
858 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
863 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
864 we cannot use Fdelq itself here because it allows quitting. */
867 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
869 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
871 XCONS(link
)->cdr
= Vbuffer_alist
;
872 Vbuffer_alist
= link
;
875 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
876 "Select buffer BUFFER in the current window.\n\
877 BUFFER may be a buffer or a buffer name.\n\
878 Optional second arg NORECORD non-nil means\n\
879 do not put this buffer at the front of the list of recently selected ones.\n\
881 WARNING: This is NOT the way to work on another buffer temporarily\n\
882 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
883 the window-buffer correspondences.")
885 Lisp_Object bufname
, norecord
;
887 register Lisp_Object buf
;
890 if (EQ (minibuf_window
, selected_window
))
891 error ("Cannot switch buffers in minibuffer window");
892 tem
= Fwindow_dedicated_p (selected_window
);
894 error ("Cannot switch buffers in a dedicated window");
897 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
899 buf
= Fget_buffer_create (bufname
);
904 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
905 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
912 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
913 "Select buffer BUFFER in some window, preferably a different one.\n\
914 If BUFFER is nil, then some other buffer is chosen.\n\
915 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
916 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
917 window even if BUFFER is already visible in the selected window.")
919 Lisp_Object bufname
, other
;
921 register Lisp_Object buf
;
923 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
925 buf
= Fget_buffer_create (bufname
);
928 Fselect_window (Fdisplay_buffer (buf
, other
));
932 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
933 "Return the current buffer as a Lisp object.")
936 register Lisp_Object buf
;
937 XSET (buf
, Lisp_Buffer
, current_buffer
);
941 /* Set the current buffer to b */
944 set_buffer_internal (b
)
945 register struct buffer
*b
;
947 register struct buffer
*old_buf
;
948 register Lisp_Object tail
, valcontents
;
951 if (current_buffer
== b
)
954 windows_or_buffers_changed
= 1;
955 old_buf
= current_buffer
;
957 last_known_column_point
= -1; /* invalidate indentation cache */
959 /* Look down buffer's list of local Lisp variables
960 to find and update any that forward into C variables. */
962 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
964 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
965 if ((BUFFER_LOCAL_VALUEP (valcontents
)
966 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
967 && (tem
= XCONS (valcontents
)->car
,
968 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
969 /* Just reference the variable
970 to cause it to become set for this buffer. */
971 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
974 /* Do the same with any others that were local to the previous buffer */
977 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
979 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
980 if ((BUFFER_LOCAL_VALUEP (valcontents
)
981 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
982 && (tem
= XCONS (valcontents
)->car
,
983 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
984 /* Just reference the variable
985 to cause it to become set for this buffer. */
986 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
990 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
991 "Make the buffer BUFFER current for editing operations.\n\
992 BUFFER may be a buffer or the name of an existing buffer.\n\
993 See also `save-excursion' when you want to make a buffer current temporarily.\n\
994 This function does not display the buffer, so its effect ends\n\
995 when the current command terminates.\n\
996 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
998 register Lisp_Object bufname
;
1000 register Lisp_Object buffer
;
1001 buffer
= Fget_buffer (bufname
);
1004 if (NILP (XBUFFER (buffer
)->name
))
1005 error ("Selecting deleted buffer");
1006 set_buffer_internal (XBUFFER (buffer
));
1010 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1011 Sbarf_if_buffer_read_only
, 0, 0, 0,
1012 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1015 if (!NILP (current_buffer
->read_only
)
1016 && NILP (Vinhibit_read_only
))
1017 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1021 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1022 "Put BUFFER at the end of the list of all buffers.\n\
1023 There it is the least likely candidate for `other-buffer' to return;\n\
1024 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1025 If BUFFER is nil or omitted, bury the current buffer.\n\
1026 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1027 selected window if it is displayed there.")
1029 register Lisp_Object buf
;
1031 /* Figure out what buffer we're going to bury. */
1034 XSET (buf
, Lisp_Buffer
, current_buffer
);
1036 /* If we're burying the current buffer, unshow it. */
1037 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1043 buf1
= Fget_buffer (buf
);
1049 /* Move buf to the end of the buffer list. */
1051 register Lisp_Object aelt
, link
;
1053 aelt
= Frassq (buf
, Vbuffer_alist
);
1054 link
= Fmemq (aelt
, Vbuffer_alist
);
1055 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1056 XCONS (link
)->cdr
= Qnil
;
1057 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1063 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1064 "Delete the entire contents of the current buffer.\n\
1065 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1066 so the buffer is truly empty after this.")
1071 current_buffer
->last_window_start
= 1;
1072 /* Prevent warnings, or suspension of auto saving, that would happen
1073 if future size is less than past size. Use of erase-buffer
1074 implies that the future text is not really related to the past text. */
1075 XFASTINT (current_buffer
->save_length
) = 0;
1079 validate_region (b
, e
)
1080 register Lisp_Object
*b
, *e
;
1084 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1085 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1087 if (XINT (*b
) > XINT (*e
))
1089 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1091 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1094 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1095 && XINT (*e
) <= ZV
))
1096 args_out_of_range (*b
, *e
);
1100 list_buffers_1 (files
)
1103 register Lisp_Object tail
, tem
, buf
;
1104 Lisp_Object col1
, col2
, col3
, minspace
;
1105 register struct buffer
*old
= current_buffer
, *b
;
1106 Lisp_Object desired_point
;
1107 Lisp_Object other_file_symbol
;
1109 desired_point
= Qnil
;
1110 other_file_symbol
= intern ("list-buffers-directory");
1112 XFASTINT (col1
) = 19;
1113 XFASTINT (col2
) = 26;
1114 XFASTINT (col3
) = 40;
1115 XFASTINT (minspace
) = 1;
1117 Fset_buffer (Vstandard_output
);
1118 Fbuffer_disable_undo (Vstandard_output
);
1119 current_buffer
->read_only
= Qnil
;
1122 MR Buffer Size Mode File\n\
1123 -- ------ ---- ---- ----\n", -1);
1125 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1127 buf
= Fcdr (Fcar (tail
));
1129 /* Don't mention the minibuffers. */
1130 if (XSTRING (b
->name
)->data
[0] == ' ')
1132 /* Optionally don't mention buffers that lack files. */
1133 if (!NILP (files
) && NILP (b
->filename
))
1135 /* Identify the current buffer. */
1137 XFASTINT (desired_point
) = point
;
1138 write_string (b
== old
? "." : " ", -1);
1139 /* Identify modified buffers */
1140 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1141 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1142 Fprinc (b
->name
, Qnil
);
1143 Findent_to (col1
, make_number (2));
1144 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1146 Findent_to (col2
, minspace
);
1147 Fprinc (b
->mode_name
, Qnil
);
1148 Findent_to (col3
, minspace
);
1150 if (!NILP (b
->filename
))
1151 Fprinc (b
->filename
, Qnil
);
1154 /* No visited file; check local value of list-buffers-directory. */
1156 set_buffer_internal (b
);
1157 tem
= Fboundp (other_file_symbol
);
1160 tem
= Fsymbol_value (other_file_symbol
);
1161 Fset_buffer (Vstandard_output
);
1166 Fset_buffer (Vstandard_output
);
1168 write_string ("\n", -1);
1171 tail
= intern ("Buffer-menu-mode");
1172 if ((tem
= Ffboundp (tail
), !NILP (tem
)))
1174 set_buffer_internal (old
);
1175 return desired_point
;
1178 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1179 "Display a list of names of existing buffers.\n\
1180 The list is displayed in a buffer named `*Buffer List*'.\n\
1181 Note that buffers with names starting with spaces are omitted.\n\
1182 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1184 The M column contains a * for buffers that are modified.\n\
1185 The R column contains a % for buffers that are read-only.")
1189 Lisp_Object desired_point
;
1192 = internal_with_output_to_temp_buffer ("*Buffer List*",
1193 list_buffers_1
, files
);
1195 if (NUMBERP (desired_point
))
1197 int count
= specpdl_ptr
- specpdl
;
1198 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1199 Fset_buffer (build_string ("*Buffer List*"));
1200 SET_PT (XINT (desired_point
));
1201 return unbind_to (count
, Qnil
);
1206 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1208 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1209 Most local variable bindings are eliminated so that the default values\n\
1210 become effective once more. Also, the syntax table is set from\n\
1211 `standard-syntax-table', the local keymap is set to nil,\n\
1212 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1213 This function also forces redisplay of the mode line.\n\
1215 Every function to select a new major mode starts by\n\
1216 calling this function.\n\n\
1217 As a special exception, local variables whose names have\n\
1218 a non-nil `permanent-local' property are not eliminated by this function.\n\
1220 The first thing this function does is run\n\
1221 the normal hook `change-major-mode-hook'.")
1224 register Lisp_Object alist
, sym
, tem
;
1227 if (!NILP (Vrun_hooks
))
1228 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1229 oalist
= current_buffer
->local_var_alist
;
1231 /* Make sure no local variables remain set up with this buffer
1232 for their current values. */
1234 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1236 sym
= XCONS (XCONS (alist
)->car
)->car
;
1238 /* Need not do anything if some other buffer's binding is now encached. */
1239 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1240 if (XBUFFER (tem
) == current_buffer
)
1242 /* Symbol is set up for this buffer's old local value.
1243 Set it up for the current buffer with the default value. */
1245 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1246 /* Store the symbol's current value into the alist entry
1247 it is currently set up for. This is so that, if the
1248 local is marked permanent, and we make it local again below,
1249 we don't lose the value. */
1250 XCONS (XCONS (tem
)->car
)->cdr
1251 = do_symval_forwarding (XCONS (XSYMBOL (sym
)->value
)->car
);
1252 /* Switch to the symbol's default-value alist entry. */
1253 XCONS (tem
)->car
= tem
;
1254 /* Mark it as current for the current buffer. */
1255 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1256 /* Store the current value into any forwarding in the symbol. */
1257 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1262 /* Actually eliminate all local bindings of this buffer. */
1264 reset_buffer_local_variables (current_buffer
);
1266 /* Redisplay mode lines; we are changing major mode. */
1268 update_mode_lines
++;
1270 /* Any which are supposed to be permanent,
1271 make local again, with the same values they had. */
1273 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1275 sym
= XCONS (XCONS (alist
)->car
)->car
;
1276 tem
= Fget (sym
, Qpermanent_local
);
1279 Fmake_local_variable (sym
);
1280 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1284 /* Force mode-line redisplay. Useful here because all major mode
1285 commands call this function. */
1286 update_mode_lines
++;
1291 /* Find all the overlays in the current buffer that contain position POS.
1292 Return the number found, and store them in a vector in *VEC_PTR.
1293 Store in *LEN_PTR the size allocated for the vector.
1294 Store in *NEXT_PTR the next position after POS where an overlay starts,
1295 or ZV if there are no more overlays.
1296 Store in *PREV_PTR the previous position after POS where an overlay ends,
1297 or BEGV if there are no previous overlays.
1298 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
1300 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1301 when this function is called.
1303 If EXTEND is non-zero, we make the vector bigger if necessary.
1304 If EXTEND is zero, we never extend the vector,
1305 and we store only as many overlays as will fit.
1306 But we still return the total number of overlays. */
1309 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
1312 Lisp_Object
**vec_ptr
;
1317 Lisp_Object tail
, overlay
, start
, end
, result
;
1320 Lisp_Object
*vec
= *vec_ptr
;
1323 int inhibit_storing
= 0;
1325 for (tail
= current_buffer
->overlays_before
;
1326 XGCTYPE (tail
) == Lisp_Cons
;
1327 tail
= XCONS (tail
)->cdr
)
1329 int startpos
, endpos
;
1331 overlay
= XCONS (tail
)->car
;
1332 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1335 start
= OVERLAY_START (overlay
);
1336 end
= OVERLAY_END (overlay
);
1337 endpos
= OVERLAY_POSITION (end
);
1346 startpos
= OVERLAY_POSITION (start
);
1347 if (startpos
<= pos
)
1351 /* The supplied vector is full.
1352 Either make it bigger, or don't store any more in it. */
1355 *len_ptr
= len
*= 2;
1356 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1360 inhibit_storing
= 1;
1363 if (!inhibit_storing
)
1365 /* Keep counting overlays even if we can't return them all. */
1368 else if (startpos
< next
)
1372 for (tail
= current_buffer
->overlays_after
;
1373 XGCTYPE (tail
) == Lisp_Cons
;
1374 tail
= XCONS (tail
)->cdr
)
1376 int startpos
, endpos
;
1378 overlay
= XCONS (tail
)->car
;
1379 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1382 start
= OVERLAY_START (overlay
);
1383 end
= OVERLAY_END (overlay
);
1384 startpos
= OVERLAY_POSITION (start
);
1387 if (startpos
< next
)
1391 endpos
= OVERLAY_POSITION (end
);
1398 *len_ptr
= len
*= 2;
1399 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1403 inhibit_storing
= 1;
1406 if (!inhibit_storing
)
1410 else if (endpos
< pos
&& endpos
> prev
)
1423 Lisp_Object overlay
;
1429 compare_overlays (s1
, s2
)
1430 struct sortvec
*s1
, *s2
;
1432 if (s1
->priority
!= s2
->priority
)
1433 return s1
->priority
- s2
->priority
;
1434 if (s1
->beg
!= s2
->beg
)
1435 return s1
->beg
- s2
->beg
;
1436 if (s1
->end
!= s2
->end
)
1437 return s2
->end
- s1
->end
;
1441 /* Sort an array of overlays by priority. The array is modified in place.
1442 The return value is the new size; this may be smaller than the original
1443 size if some of the overlays were invalid or were window-specific. */
1445 sort_overlays (overlay_vec
, noverlays
, w
)
1446 Lisp_Object
*overlay_vec
;
1451 struct sortvec
*sortvec
;
1452 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1454 /* Put the valid and relevant overlays into sortvec. */
1456 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1459 Lisp_Object overlay
;
1461 overlay
= overlay_vec
[i
];
1462 if (OVERLAY_VALID (overlay
)
1463 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1464 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1466 /* If we're interested in a specific window, then ignore
1467 overlays that are limited to some other window. */
1472 window
= Foverlay_get (overlay
, Qwindow
);
1473 if (WINDOWP (window
) && XWINDOW (window
) != w
)
1477 /* This overlay is good and counts: put it into sortvec. */
1478 sortvec
[j
].overlay
= overlay
;
1479 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1480 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1481 tem
= Foverlay_get (overlay
, Qpriority
);
1483 sortvec
[j
].priority
= XINT (tem
);
1485 sortvec
[j
].priority
= 0;
1491 /* Sort the overlays into the proper order: increasing priority. */
1494 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1496 for (i
= 0; i
< noverlays
; i
++)
1497 overlay_vec
[i
] = sortvec
[i
].overlay
;
1501 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1504 recenter_overlay_lists (buf
, pos
)
1508 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1510 /* See if anything in overlays_before should move to overlays_after. */
1512 /* We don't strictly need prev in this loop; it should always be nil.
1513 But we use it for symmetry and in case that should cease to be true
1514 with some future change. */
1516 for (tail
= buf
->overlays_before
;
1518 prev
= tail
, tail
= next
)
1520 next
= XCONS (tail
)->cdr
;
1521 overlay
= XCONS (tail
)->car
;
1523 /* If the overlay is not valid, get rid of it. */
1524 if (!OVERLAY_VALID (overlay
))
1529 /* Splice the cons cell TAIL out of overlays_before. */
1531 XCONS (prev
)->cdr
= next
;
1533 buf
->overlays_before
= next
;
1539 beg
= OVERLAY_START (overlay
);
1540 end
= OVERLAY_END (overlay
);
1542 if (OVERLAY_POSITION (end
) > pos
)
1544 /* OVERLAY needs to be moved. */
1545 int where
= OVERLAY_POSITION (beg
);
1546 Lisp_Object other
, other_prev
;
1548 /* Splice the cons cell TAIL out of overlays_before. */
1550 XCONS (prev
)->cdr
= next
;
1552 buf
->overlays_before
= next
;
1554 /* Search thru overlays_after for where to put it. */
1556 for (other
= buf
->overlays_after
;
1558 other_prev
= other
, other
= XCONS (other
)->cdr
)
1560 Lisp_Object otherbeg
, otheroverlay
, follower
;
1563 otheroverlay
= XCONS (other
)->car
;
1564 if (! OVERLAY_VALID (otheroverlay
))
1567 otherbeg
= OVERLAY_START (otheroverlay
);
1568 if (OVERLAY_POSITION (otherbeg
) >= where
)
1572 /* Add TAIL to overlays_after before OTHER. */
1573 XCONS (tail
)->cdr
= other
;
1574 if (!NILP (other_prev
))
1575 XCONS (other_prev
)->cdr
= tail
;
1577 buf
->overlays_after
= tail
;
1581 /* We've reached the things that should stay in overlays_before.
1582 All the rest of overlays_before must end even earlier,
1587 /* See if anything in overlays_after should be in overlays_before. */
1589 for (tail
= buf
->overlays_after
;
1591 prev
= tail
, tail
= next
)
1593 next
= XCONS (tail
)->cdr
;
1594 overlay
= XCONS (tail
)->car
;
1596 /* If the overlay is not valid, get rid of it. */
1597 if (!OVERLAY_VALID (overlay
))
1602 /* Splice the cons cell TAIL out of overlays_after. */
1604 XCONS (prev
)->cdr
= next
;
1606 buf
->overlays_after
= next
;
1612 beg
= OVERLAY_START (overlay
);
1613 end
= OVERLAY_END (overlay
);
1615 /* Stop looking, when we know that nothing further
1616 can possibly end before POS. */
1617 if (OVERLAY_POSITION (beg
) > pos
)
1620 if (OVERLAY_POSITION (end
) <= pos
)
1622 /* OVERLAY needs to be moved. */
1623 int where
= OVERLAY_POSITION (end
);
1624 Lisp_Object other
, other_prev
;
1626 /* Splice the cons cell TAIL out of overlays_after. */
1628 XCONS (prev
)->cdr
= next
;
1630 buf
->overlays_after
= next
;
1632 /* Search thru overlays_before for where to put it. */
1634 for (other
= buf
->overlays_before
;
1636 other_prev
= other
, other
= XCONS (other
)->cdr
)
1638 Lisp_Object otherend
, otheroverlay
;
1641 otheroverlay
= XCONS (other
)->car
;
1642 if (! OVERLAY_VALID (otheroverlay
))
1645 otherend
= OVERLAY_END (otheroverlay
);
1646 if (OVERLAY_POSITION (otherend
) <= where
)
1650 /* Add TAIL to overlays_before before OTHER. */
1651 XCONS (tail
)->cdr
= other
;
1652 if (!NILP (other_prev
))
1653 XCONS (other_prev
)->cdr
= tail
;
1655 buf
->overlays_before
= tail
;
1660 XFASTINT (buf
->overlay_center
) = pos
;
1663 /* Fix up overlays that were garbled as a result of permuting markers
1664 in the range START through END. Any overlay with at least one
1665 endpoint in this range will need to be unlinked from the overlay
1666 list and reinserted in its proper place.
1667 Such an overlay might even have negative size at this point.
1668 If so, we'll reverse the endpoints. Can you think of anything
1669 better to do in this situation? */
1671 fix_overlays_in_range (start
, end
)
1672 register int start
, end
;
1674 Lisp_Object tem
, overlay
;
1675 Lisp_Object before_list
, after_list
;
1676 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
1677 int startpos
, endpos
;
1679 /* This algorithm shifts links around instead of consing and GCing.
1680 The loop invariant is that before_list (resp. after_list) is a
1681 well-formed list except that its last element, the one that
1682 *pbefore (resp. *pafter) points to, is still uninitialized.
1683 So it's not a bug that before_list isn't initialized, although
1684 it may look strange. */
1685 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
1687 overlay
= XCONS (*ptail
)->car
;
1688 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1691 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1693 || (startpos
>= start
&& startpos
< end
))
1695 /* If the overlay is backwards, fix that now. */
1696 if (startpos
> endpos
)
1699 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1700 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1701 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1703 /* Add it to the end of the wrong list. Later on,
1704 recenter_overlay_lists will move it to the right place. */
1705 if (endpos
< XINT (current_buffer
->overlay_center
))
1708 pafter
= &XCONS (*ptail
)->cdr
;
1713 pbefore
= &XCONS (*ptail
)->cdr
;
1715 *ptail
= XCONS (*ptail
)->cdr
;
1718 ptail
= &XCONS (*ptail
)->cdr
;
1720 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
1722 overlay
= XCONS (*ptail
)->car
;
1723 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1724 if (startpos
>= end
)
1726 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1727 if (startpos
>= start
1728 || (endpos
>= start
&& endpos
< end
))
1730 if (startpos
> endpos
)
1733 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1734 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1735 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1737 if (endpos
< XINT (current_buffer
->overlay_center
))
1740 pafter
= &XCONS (*ptail
)->cdr
;
1745 pbefore
= &XCONS (*ptail
)->cdr
;
1747 *ptail
= XCONS (*ptail
)->cdr
;
1750 ptail
= &XCONS (*ptail
)->cdr
;
1753 /* Splice the constructed (wrong) lists into the buffer's lists,
1754 and let the recenter function make it sane again. */
1755 *pbefore
= current_buffer
->overlays_before
;
1756 current_buffer
->overlays_before
= before_list
;
1757 recenter_overlay_lists (current_buffer
,
1758 XINT (current_buffer
->overlay_center
));
1760 *pafter
= current_buffer
->overlays_after
;
1761 current_buffer
->overlays_after
= after_list
;
1762 recenter_overlay_lists (current_buffer
,
1763 XINT (current_buffer
->overlay_center
));
1766 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1767 "Return t if OBJECT is an overlay.")
1771 return (OVERLAYP (object
) ? Qt
: Qnil
);
1774 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1775 "Create a new overlay with range BEG to END in BUFFER.\n\
1776 If omitted, BUFFER defaults to the current buffer.\n\
1777 BEG and END may be integers or markers.")
1779 Lisp_Object beg
, end
, buffer
;
1781 Lisp_Object overlay
;
1785 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1787 CHECK_BUFFER (buffer
, 2);
1789 && ! EQ (Fmarker_buffer (beg
), buffer
))
1790 error ("Marker points into wrong buffer");
1792 && ! EQ (Fmarker_buffer (end
), buffer
))
1793 error ("Marker points into wrong buffer");
1795 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1796 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1798 if (XINT (beg
) > XINT (end
))
1801 temp
= beg
; beg
= end
; end
= temp
;
1804 b
= XBUFFER (buffer
);
1806 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1807 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1809 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1810 XSETTYPE (overlay
, Lisp_Overlay
);
1812 /* Put the new overlay on the wrong list. */
1813 end
= OVERLAY_END (overlay
);
1814 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1815 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1817 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1819 /* This puts it in the right list, and in the right order. */
1820 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1822 /* We don't need to redisplay the region covered by the overlay, because
1823 the overlay has no properties at the moment. */
1828 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1829 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1830 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1831 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1833 (overlay
, beg
, end
, buffer
)
1834 Lisp_Object overlay
, beg
, end
, buffer
;
1836 struct buffer
*b
, *ob
;
1837 Lisp_Object obuffer
;
1838 int count
= specpdl_ptr
- specpdl
;
1840 CHECK_OVERLAY (overlay
, 0);
1842 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1844 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1845 CHECK_BUFFER (buffer
, 3);
1848 && ! EQ (Fmarker_buffer (beg
), buffer
))
1849 error ("Marker points into wrong buffer");
1851 && ! EQ (Fmarker_buffer (end
), buffer
))
1852 error ("Marker points into wrong buffer");
1854 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1855 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1857 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
1858 return Fdelete_overlay (overlay
);
1860 if (XINT (beg
) > XINT (end
))
1863 temp
= beg
; beg
= end
; end
= temp
;
1866 specbind (Qinhibit_quit
, Qt
);
1868 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1869 b
= XBUFFER (buffer
);
1870 ob
= XBUFFER (obuffer
);
1872 /* If the overlay has changed buffers, do a thorough redisplay. */
1873 if (!EQ (buffer
, obuffer
))
1875 /* Redisplay where the overlay was. */
1876 if (!NILP (obuffer
))
1881 o_beg
= OVERLAY_START (overlay
);
1882 o_end
= OVERLAY_END (overlay
);
1883 o_beg
= OVERLAY_POSITION (o_beg
);
1884 o_end
= OVERLAY_POSITION (o_end
);
1886 redisplay_region (ob
, XINT (o_beg
), XINT (o_end
));
1889 /* Redisplay where the overlay is going to be. */
1890 redisplay_region (b
, XINT (beg
), XINT (end
));
1892 /* Don't limit redisplay to the selected window. */
1893 windows_or_buffers_changed
= 1;
1896 /* Redisplay the area the overlay has just left, or just enclosed. */
1900 int change_beg
, change_end
;
1902 o_beg
= OVERLAY_START (overlay
);
1903 o_end
= OVERLAY_END (overlay
);
1904 o_beg
= OVERLAY_POSITION (o_beg
);
1905 o_end
= OVERLAY_POSITION (o_end
);
1907 if (XINT (o_beg
) == XINT (beg
))
1908 redisplay_region (b
, XINT (o_end
), XINT (end
));
1909 else if (XINT (o_end
) == XINT (end
))
1910 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1913 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1914 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1915 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1919 if (!NILP (obuffer
))
1921 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1922 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1925 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1926 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1928 /* Put the overlay on the wrong list. */
1929 end
= OVERLAY_END (overlay
);
1930 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1931 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1933 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1935 /* This puts it in the right list, and in the right order. */
1936 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1938 return unbind_to (count
, overlay
);
1941 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1942 "Delete the overlay OVERLAY from its buffer.")
1944 Lisp_Object overlay
;
1948 int count
= specpdl_ptr
- specpdl
;
1950 CHECK_OVERLAY (overlay
, 0);
1952 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1956 b
= XBUFFER (buffer
);
1958 specbind (Qinhibit_quit
, Qt
);
1960 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1961 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1963 redisplay_region (b
,
1964 marker_position (OVERLAY_START (overlay
)),
1965 marker_position (OVERLAY_END (overlay
)));
1967 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1968 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1970 return unbind_to (count
, Qnil
);
1973 /* Overlay dissection functions. */
1975 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1976 "Return the position at which OVERLAY starts.")
1978 Lisp_Object overlay
;
1980 CHECK_OVERLAY (overlay
, 0);
1982 return (Fmarker_position (OVERLAY_START (overlay
)));
1985 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1986 "Return the position at which OVERLAY ends.")
1988 Lisp_Object overlay
;
1990 CHECK_OVERLAY (overlay
, 0);
1992 return (Fmarker_position (OVERLAY_END (overlay
)));
1995 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1996 "Return the buffer OVERLAY belongs to.")
1998 Lisp_Object overlay
;
2000 CHECK_OVERLAY (overlay
, 0);
2002 return Fmarker_buffer (OVERLAY_START (overlay
));
2005 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
2006 "Return a list of the properties on OVERLAY.\n\
2007 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
2010 Lisp_Object overlay
;
2012 CHECK_OVERLAY (overlay
, 0);
2014 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
2018 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
2019 "Return a list of the overlays that contain position POS.")
2024 Lisp_Object
*overlay_vec
;
2028 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2031 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2033 /* Put all the overlays we want in a vector in overlay_vec.
2034 Store the length in len. */
2035 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, NULL
, NULL
);
2037 /* Make a list of them all. */
2038 result
= Flist (noverlays
, overlay_vec
);
2040 xfree (overlay_vec
);
2044 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2046 "Return the next position after POS where an overlay starts or ends.\n\
2047 If there are no more overlay boundaries after POS, return (point-max).")
2053 Lisp_Object
*overlay_vec
;
2057 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2060 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2062 /* Put all the overlays we want in a vector in overlay_vec.
2063 Store the length in len.
2064 endpos gets the position where the next overlay starts. */
2065 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
, NULL
);
2067 /* If any of these overlays ends before endpos,
2068 use its ending point instead. */
2069 for (i
= 0; i
< noverlays
; i
++)
2074 oend
= OVERLAY_END (overlay_vec
[i
]);
2075 oendpos
= OVERLAY_POSITION (oend
);
2076 if (oendpos
< endpos
)
2080 xfree (overlay_vec
);
2081 return make_number (endpos
);
2084 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
2085 Sprevious_overlay_change
, 1, 1, 0,
2086 "Return the previous position before POS where an overlay starts or ends.\n\
2087 If there are no more overlay boundaries after POS, return (point-min).")
2093 Lisp_Object
*overlay_vec
;
2097 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2100 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2102 /* Put all the overlays we want in a vector in overlay_vec.
2103 Store the length in len.
2104 prevpos gets the position of an overlay end. */
2105 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, NULL
, &prevpos
);
2107 /* If any of these overlays starts before endpos,
2108 maybe use its starting point instead. */
2109 for (i
= 0; i
< noverlays
; i
++)
2114 ostart
= OVERLAY_START (overlay_vec
[i
]);
2115 ostartpos
= OVERLAY_POSITION (ostart
);
2116 if (ostartpos
> prevpos
&& ostartpos
< XINT (pos
))
2117 prevpos
= ostartpos
;
2120 xfree (overlay_vec
);
2121 return make_number (prevpos
);
2124 /* These functions are for debugging overlays. */
2126 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2127 "Return a pair of lists giving all the overlays of the current buffer.\n\
2128 The car has all the overlays before the overlay center;\n\
2129 the cdr has all the overlays after the overlay center.\n\
2130 Recentering overlays moves overlays between these lists.\n\
2131 The lists you get are copies, so that changing them has no effect.\n\
2132 However, the overlays you get are the real objects that the buffer uses.")
2135 Lisp_Object before
, after
;
2136 before
= current_buffer
->overlays_before
;
2138 before
= Fcopy_sequence (before
);
2139 after
= current_buffer
->overlays_after
;
2141 after
= Fcopy_sequence (after
);
2143 return Fcons (before
, after
);
2146 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2147 "Recenter the overlays of the current buffer around position POS.")
2151 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2153 recenter_overlay_lists (current_buffer
, XINT (pos
));
2157 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2158 "Get the property of overlay OVERLAY with property name NAME.")
2160 Lisp_Object overlay
, prop
;
2164 CHECK_OVERLAY (overlay
, 0);
2166 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2167 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2168 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2170 if (EQ (XCONS (plist
)->car
, prop
))
2171 return XCONS (XCONS (plist
)->cdr
)->car
;
2177 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2178 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2179 (overlay
, prop
, value
)
2180 Lisp_Object overlay
, prop
, value
;
2182 Lisp_Object plist
, tail
, buffer
;
2185 CHECK_OVERLAY (overlay
, 0);
2187 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
2189 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2192 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2193 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2194 if (EQ (XCONS (tail
)->car
, prop
))
2196 changed
= !EQ (XCONS (XCONS (tail
)->cdr
)->car
, value
);
2197 XCONS (XCONS (tail
)->cdr
)->car
= value
;
2200 /* It wasn't in the list, so add it to the front. */
2201 changed
= !NILP (value
);
2202 if (! CONSP (XCONS (overlay
)->cdr
))
2203 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
2204 XCONS (XCONS (overlay
)->cdr
)->cdr
= Fcons (prop
, Fcons (value
, plist
));
2206 if (! NILP (buffer
))
2209 redisplay_region (XBUFFER (buffer
),
2210 marker_position (OVERLAY_START (overlay
)),
2211 marker_position (OVERLAY_END (overlay
)));
2212 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
2213 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
2214 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
2215 Fdelete_overlay (overlay
);
2220 /* Run the modification-hooks of overlays that include
2221 any part of the text in START to END.
2222 Run the insert-before-hooks of overlay starting at END,
2223 and the insert-after-hooks of overlay ending at START. */
2226 verify_overlay_modification (start
, end
)
2227 Lisp_Object start
, end
;
2229 Lisp_Object prop
, overlay
, tail
;
2230 int insertion
= EQ (start
, end
);
2232 struct gcpro gcpro1
, gcpro2
;
2236 GCPRO2 (overlay
, tail
);
2239 for (tail
= current_buffer
->overlays_before
;
2241 tail
= XCONS (tail
)->cdr
)
2243 int startpos
, endpos
;
2244 Lisp_Object ostart
, oend
;
2246 overlay
= XCONS (tail
)->car
;
2248 ostart
= OVERLAY_START (overlay
);
2249 oend
= OVERLAY_END (overlay
);
2250 endpos
= OVERLAY_POSITION (oend
);
2251 if (XFASTINT (start
) > endpos
)
2253 startpos
= OVERLAY_POSITION (ostart
);
2254 if (XFASTINT (end
) == startpos
&& insertion
)
2256 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2259 /* Copy TAIL in case the hook recenters the overlay lists. */
2261 tail
= Fcopy_sequence (tail
);
2263 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2266 if (XFASTINT (start
) == endpos
&& insertion
)
2268 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2272 tail
= Fcopy_sequence (tail
);
2274 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2277 /* Test for intersecting intervals. This does the right thing
2278 for both insertion and deletion. */
2279 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2281 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2285 tail
= Fcopy_sequence (tail
);
2287 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2293 for (tail
= current_buffer
->overlays_after
;
2295 tail
= XCONS (tail
)->cdr
)
2297 int startpos
, endpos
;
2298 Lisp_Object ostart
, oend
;
2300 overlay
= XCONS (tail
)->car
;
2302 ostart
= OVERLAY_START (overlay
);
2303 oend
= OVERLAY_END (overlay
);
2304 startpos
= OVERLAY_POSITION (ostart
);
2305 endpos
= OVERLAY_POSITION (oend
);
2306 if (XFASTINT (end
) < startpos
)
2308 if (XFASTINT (end
) == startpos
&& insertion
)
2310 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2314 tail
= Fcopy_sequence (tail
);
2316 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2319 if (XFASTINT (start
) == endpos
&& insertion
)
2321 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2325 tail
= Fcopy_sequence (tail
);
2327 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2330 /* Test for intersecting intervals. This does the right thing
2331 for both insertion and deletion. */
2332 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2334 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2338 tail
= Fcopy_sequence (tail
);
2340 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2349 call_overlay_mod_hooks (list
, overlay
, start
, end
)
2350 Lisp_Object list
, overlay
, start
, end
;
2352 struct gcpro gcpro1
;
2354 while (!NILP (list
))
2356 call3 (Fcar (list
), overlay
, start
, end
);
2362 /* Delete any zero-sized overlays at position POS, if the `evaporate'
2365 evaporate_overlays (pos
)
2368 Lisp_Object tail
, overlay
, hit_list
;
2371 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
2372 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
2373 tail
= XCONS (tail
)->cdr
)
2376 overlay
= XCONS (tail
)->car
;
2377 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2380 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
2381 && Foverlay_get (overlay
, Qevaporate
))
2382 hit_list
= Fcons (overlay
, hit_list
);
2385 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
2386 tail
= XCONS (tail
)->cdr
)
2389 overlay
= XCONS (tail
)->car
;
2390 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2393 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
2394 && Foverlay_get (overlay
, Qevaporate
))
2395 hit_list
= Fcons (overlay
, hit_list
);
2397 for (; CONSP (hit_list
); hit_list
= XCONS (hit_list
)->cdr
)
2398 Fdelete_overlay (XCONS (hit_list
)->car
);
2401 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2402 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2404 buffer_slot_type_mismatch (valcontents
, newval
)
2405 Lisp_Object valcontents
, newval
;
2407 unsigned int offset
= XUINT (valcontents
);
2408 unsigned char *symbol_name
=
2409 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2413 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2415 case Lisp_Int
: type_name
= "integers"; break;
2416 case Lisp_String
: type_name
= "strings"; break;
2417 case Lisp_Marker
: type_name
= "markers"; break;
2418 case Lisp_Symbol
: type_name
= "symbols"; break;
2419 case Lisp_Cons
: type_name
= "lists"; break;
2420 case Lisp_Vector
: type_name
= "vectors"; break;
2425 error ("only %s should be stored in the buffer-local variable %s",
2426 type_name
, symbol_name
);
2431 register Lisp_Object tem
;
2433 /* Make sure all markable slots in buffer_defaults
2434 are initialized reasonably, so mark_buffer won't choke. */
2435 reset_buffer (&buffer_defaults
);
2436 reset_buffer_local_variables (&buffer_defaults
);
2437 reset_buffer (&buffer_local_symbols
);
2438 reset_buffer_local_variables (&buffer_local_symbols
);
2439 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2440 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2442 /* Set up the default values of various buffer slots. */
2443 /* Must do these before making the first buffer! */
2445 /* real setup is done in loaddefs.el */
2446 buffer_defaults
.mode_line_format
= build_string ("%-");
2447 buffer_defaults
.abbrev_mode
= Qnil
;
2448 buffer_defaults
.overwrite_mode
= Qnil
;
2449 buffer_defaults
.case_fold_search
= Qt
;
2450 buffer_defaults
.auto_fill_function
= Qnil
;
2451 buffer_defaults
.selective_display
= Qnil
;
2453 buffer_defaults
.selective_display_ellipses
= Qt
;
2455 buffer_defaults
.abbrev_table
= Qnil
;
2456 buffer_defaults
.display_table
= Qnil
;
2457 buffer_defaults
.undo_list
= Qnil
;
2458 buffer_defaults
.mark_active
= Qnil
;
2459 buffer_defaults
.overlays_before
= Qnil
;
2460 buffer_defaults
.overlays_after
= Qnil
;
2461 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2463 XFASTINT (buffer_defaults
.tab_width
) = 8;
2464 buffer_defaults
.truncate_lines
= Qnil
;
2465 buffer_defaults
.ctl_arrow
= Qt
;
2468 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
2470 XFASTINT (buffer_defaults
.fill_column
) = 70;
2471 XFASTINT (buffer_defaults
.left_margin
) = 0;
2473 /* Assign the local-flags to the slots that have default values.
2474 The local flag is a bit that is used in the buffer
2475 to say that it has its own local value for the slot.
2476 The local flag bits are in the local_var_flags slot of the buffer. */
2478 /* Nothing can work if this isn't true */
2479 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
2481 /* 0 means not a lisp var, -1 means always local, else mask */
2482 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2483 XFASTINT (buffer_local_flags
.filename
) = -1;
2484 XFASTINT (buffer_local_flags
.directory
) = -1;
2485 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2486 XFASTINT (buffer_local_flags
.save_length
) = -1;
2487 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2488 XFASTINT (buffer_local_flags
.read_only
) = -1;
2489 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2490 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2491 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2492 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2494 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2495 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2496 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2497 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2498 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2499 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2501 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2503 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2504 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2505 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2506 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2507 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2508 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2509 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2510 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2512 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2515 Vbuffer_alist
= Qnil
;
2519 QSFundamental
= build_string ("Fundamental");
2521 Qfundamental_mode
= intern ("fundamental-mode");
2522 buffer_defaults
.major_mode
= Qfundamental_mode
;
2524 Qmode_class
= intern ("mode-class");
2526 Qprotected_field
= intern ("protected-field");
2528 Qpermanent_local
= intern ("permanent-local");
2530 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2532 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2533 /* super-magic invisible buffer */
2534 Vbuffer_alist
= Qnil
;
2536 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2541 char buf
[MAXPATHLEN
+1];
2543 struct stat dotstat
, pwdstat
;
2546 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2548 /* If PWD is accurate, use it instead of calling getwd. This is faster
2549 when PWD is right, and may avoid a fatal error. */
2550 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2551 && stat (pwd
, &pwdstat
) == 0
2552 && stat (".", &dotstat
) == 0
2553 && dotstat
.st_ino
== pwdstat
.st_ino
2554 && dotstat
.st_dev
== pwdstat
.st_dev
2555 && strlen (pwd
) < MAXPATHLEN
)
2557 else if (getwd (buf
) == 0)
2558 fatal ("`getwd' failed: %s.\n", buf
);
2561 /* Maybe this should really use some standard subroutine
2562 whose definition is filename syntax dependent. */
2563 if (buf
[strlen (buf
) - 1] != '/')
2565 #endif /* not VMS */
2566 current_buffer
->directory
= build_string (buf
);
2568 temp
= get_minibuffer (0);
2569 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2572 /* initialize the buffer routines */
2575 extern Lisp_Object Qdisabled
;
2577 staticpro (&Vbuffer_defaults
);
2578 staticpro (&Vbuffer_local_symbols
);
2579 staticpro (&Qfundamental_mode
);
2580 staticpro (&Qmode_class
);
2581 staticpro (&QSFundamental
);
2582 staticpro (&Vbuffer_alist
);
2583 staticpro (&Qprotected_field
);
2584 staticpro (&Qpermanent_local
);
2585 staticpro (&Qkill_buffer_hook
);
2586 staticpro (&Qoverlayp
);
2587 Qevaporate
= intern ("evaporate");
2588 staticpro (&Qevaporate
);
2589 staticpro (&Qmodification_hooks
);
2590 Qmodification_hooks
= intern ("modification-hooks");
2591 staticpro (&Qinsert_in_front_hooks
);
2592 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2593 staticpro (&Qinsert_behind_hooks
);
2594 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2595 staticpro (&Qget_file_buffer
);
2596 Qget_file_buffer
= intern ("get-file-buffer");
2597 Qpriority
= intern ("priority");
2598 staticpro (&Qpriority
);
2599 Qwindow
= intern ("window");
2600 staticpro (&Qwindow
);
2602 Qoverlayp
= intern ("overlayp");
2604 Fput (Qprotected_field
, Qerror_conditions
,
2605 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2606 Fput (Qprotected_field
, Qerror_message
,
2607 build_string ("Attempt to modify a protected field"));
2609 /* All these use DEFVAR_LISP_NOPRO because the slots in
2610 buffer_defaults will all be marked via Vbuffer_defaults. */
2612 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2613 &buffer_defaults
.mode_line_format
,
2614 "Default value of `mode-line-format' for buffers that don't override it.\n\
2615 This is the same as (default-value 'mode-line-format).");
2617 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2618 &buffer_defaults
.abbrev_mode
,
2619 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2620 This is the same as (default-value 'abbrev-mode).");
2622 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2623 &buffer_defaults
.ctl_arrow
,
2624 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2625 This is the same as (default-value 'ctl-arrow).");
2627 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2628 &buffer_defaults
.truncate_lines
,
2629 "Default value of `truncate-lines' for buffers that do not override it.\n\
2630 This is the same as (default-value 'truncate-lines).");
2632 DEFVAR_LISP_NOPRO ("default-fill-column",
2633 &buffer_defaults
.fill_column
,
2634 "Default value of `fill-column' for buffers that do not override it.\n\
2635 This is the same as (default-value 'fill-column).");
2637 DEFVAR_LISP_NOPRO ("default-left-margin",
2638 &buffer_defaults
.left_margin
,
2639 "Default value of `left-margin' for buffers that do not override it.\n\
2640 This is the same as (default-value 'left-margin).");
2642 DEFVAR_LISP_NOPRO ("default-tab-width",
2643 &buffer_defaults
.tab_width
,
2644 "Default value of `tab-width' for buffers that do not override it.\n\
2645 This is the same as (default-value 'tab-width).");
2647 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2648 &buffer_defaults
.case_fold_search
,
2649 "Default value of `case-fold-search' for buffers that don't override it.\n\
2650 This is the same as (default-value 'case-fold-search).");
2653 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2654 &buffer_defaults
.buffer_file_type
,
2655 "Default file type for buffers that do not override it.\n\
2656 This is the same as (default-value 'buffer-file-type).\n\
2657 The file type is nil for text, t for binary.");
2660 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2663 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2664 But make-docfile finds it!
2665 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2667 "Template for displaying mode line for current buffer.\n\
2668 Each buffer has its own value of this variable.\n\
2669 Value may be a string, a symbol or a list or cons cell.\n\
2670 For a symbol, its value is used (but it is ignored if t or nil).\n\
2671 A string appearing directly as the value of a symbol is processed verbatim\n\
2672 in that the %-constructs below are not recognized.\n\
2673 For a list whose car is a symbol, the symbol's value is taken,\n\
2674 and if that is non-nil, the cadr of the list is processed recursively.\n\
2675 Otherwise, the caddr of the list (if there is one) is processed.\n\
2676 For a list whose car is a string or list, each element is processed\n\
2677 recursively and the results are effectively concatenated.\n\
2678 For a list whose car is an integer, the cdr of the list is processed\n\
2679 and padded (if the number is positive) or truncated (if negative)\n\
2680 to the width specified by that number.\n\
2681 A string is printed verbatim in the mode line except for %-constructs:\n\
2682 (%-constructs are allowed when the string is the entire mode-line-format\n\
2683 or when it is found in a cons-cell or a list)\n\
2684 %b -- print buffer name. %f -- print visited file name.\n\
2685 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
2686 % means buffer is read-only and * means it is modified.\n\
2687 For a modified read-only buffer, %* gives % and %+ gives *.\n\
2688 %s -- print process status. %l -- print the current line number.\n\
2689 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
2690 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
2691 or print Bottom or All.\n\
2692 %n -- print Narrow if appropriate.\n\
2693 %t -- print T if files is text, B if binary.\n\
2694 %[ -- print one [ for each recursive editing level. %] similar.\n\
2695 %% -- print %. %- -- print infinitely many dashes.\n\
2696 Decimal digits after the % specify field width to which to pad.");
2699 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2700 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2701 nil here means use current buffer's major mode.");
2703 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2704 make_number (Lisp_Symbol
),
2705 "Symbol for current buffer's major mode.");
2707 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2708 make_number (Lisp_String
),
2709 "Pretty name of current buffer's major mode (a string).");
2711 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2712 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2713 Automatically becomes buffer-local when set in any fashion.");
2715 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2717 "*Non-nil if searches should ignore case.\n\
2718 Automatically becomes buffer-local when set in any fashion.");
2720 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2721 make_number (Lisp_Int
),
2722 "*Column beyond which automatic line-wrapping should happen.\n\
2723 Automatically becomes buffer-local when set in any fashion.");
2725 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2726 make_number (Lisp_Int
),
2727 "*Column for the default indent-line-function to indent to.\n\
2728 Linefeed indents to this column in Fundamental mode.\n\
2729 Automatically becomes buffer-local when set in any fashion.");
2731 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2732 make_number (Lisp_Int
),
2733 "*Distance between tab stops (for display of tab characters), in columns.\n\
2734 Automatically becomes buffer-local when set in any fashion.");
2736 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2737 "*Non-nil means display control chars with uparrow.\n\
2738 Nil means use backslash and octal digits.\n\
2739 Automatically becomes buffer-local when set in any fashion.\n\
2740 This variable does not apply to characters whose display is specified\n\
2741 in the current display table (if there is one).");
2743 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2744 "*Non-nil means do not display continuation lines;\n\
2745 give each line of text one screen line.\n\
2746 Automatically becomes buffer-local when set in any fashion.\n\
2748 Note that this is overridden by the variable\n\
2749 `truncate-partial-width-windows' if that variable is non-nil\n\
2750 and this buffer is not full-frame width.");
2753 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2755 "*If visited file is text, nil; otherwise, t.");
2758 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2759 make_number (Lisp_String
),
2760 "Name of default directory of current buffer. Should end with slash.\n\
2761 Each buffer has its own value of this variable.");
2763 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2765 "Function called (if non-nil) to perform auto-fill.\n\
2766 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2767 Each buffer has its own value of this variable.\n\
2768 NOTE: This variable is not an ordinary hook;\n\
2769 It may not be a list of functions.");
2771 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2772 make_number (Lisp_String
),
2773 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2774 Each buffer has its own value of this variable.");
2776 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2777 ¤t_buffer
->auto_save_file_name
,
2778 make_number (Lisp_String
),
2779 "Name of file for auto-saving current buffer,\n\
2780 or nil if buffer should not be auto-saved.\n\
2781 Each buffer has its own value of this variable.");
2783 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2784 "Non-nil if this buffer is read-only.\n\
2785 Each buffer has its own value of this variable.");
2787 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2788 "Non-nil if this buffer's file has been backed up.\n\
2789 Backing up is done before the first time the file is saved.\n\
2790 Each buffer has its own value of this variable.");
2792 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2793 make_number (Lisp_Int
),
2794 "Length of current buffer when last read in, saved or auto-saved.\n\
2796 Each buffer has its own value of this variable.");
2798 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2800 "Non-nil enables selective display:\n\
2801 Integer N as value means display only lines\n\
2802 that start with less than n columns of space.\n\
2803 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2804 Then ^M's in the file are written into files as newlines.\n\n\
2805 Automatically becomes buffer-local when set in any fashion.");
2808 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2809 ¤t_buffer
->selective_display_ellipses
,
2811 "t means display ... on previous line when a line is invisible.\n\
2812 Automatically becomes buffer-local when set in any fashion.");
2815 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2816 "Non-nil if self-insertion should replace existing text.\n\
2817 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2818 inserts at the end of a line, and inserts when point is before a tab,\n\
2819 until the tab is filled in.\n\
2820 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2821 Automatically becomes buffer-local when set in any fashion.");
2823 #if 0 /* The doc string is too long for some compilers,
2824 but make-docfile can find it in this comment. */
2825 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2827 "Display table that controls display of the contents of current buffer.\n\
2828 Automatically becomes buffer-local when set in any fashion.\n\
2829 The display table is a vector created with `make-display-table'.\n\
2830 The first 256 elements control how to display each possible text character.\n\
2831 Each value should be a vector of characters or nil;\n\
2832 nil means display the character in the default fashion.\n\
2833 The remaining six elements control the display of\n\
2834 the end of a truncated screen line (element 256, a single character);\n\
2835 the end of a continued line (element 257, a single character);\n\
2836 the escape character used to display character codes in octal\n\
2837 (element 258, a single character);\n\
2838 the character used as an arrow for control characters (element 259,\n\
2839 a single character);\n\
2840 the decoration indicating the presence of invisible lines (element 260,\n\
2841 a vector of characters);\n\
2842 the character used to draw the border between side-by-side windows\n\
2843 (element 261, a single character).\n\
2844 If this variable is nil, the value of `standard-display-table' is used.\n\
2845 Each window can have its own, overriding display table.");
2847 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2850 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2853 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2854 "Function to call before each text change.\n\
2855 Two arguments are passed to the function: the positions of\n\
2856 the beginning and end of the range of old text to be changed.\n\
2857 \(For an insertion, the beginning and end are at the same place.)\n\
2858 No information is given about the length of the text after the change.\n\
2860 Buffer changes made while executing the `before-change-function'\n\
2861 don't call any before-change or after-change functions.\n\
2862 That's because these variables are temporarily set to nil.\n\
2863 As a result, a hook function cannot straightforwardly alter the value of\n\
2864 these variables. See the Emacs Lisp manual for a way of\n\
2865 accomplishing an equivalent result by using other variables.");
2866 Vbefore_change_function
= Qnil
;
2868 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2869 "Function to call after each text change.\n\
2870 Three arguments are passed to the function: the positions of\n\
2871 the beginning and end of the range of changed text,\n\
2872 and the length of the pre-change text replaced by that range.\n\
2873 \(For an insertion, the pre-change length is zero;\n\
2874 for a deletion, that length is the number of characters deleted,\n\
2875 and the post-change beginning and end are at the same place.)\n\
2877 Buffer changes made while executing the `after-change-function'\n\
2878 don't call any before-change or after-change functions.\n\
2879 That's because these variables are temporarily set to nil.\n\
2880 As a result, a hook function cannot straightforwardly alter the value of\n\
2881 these variables. See the Emacs Lisp manual for a way of\n\
2882 accomplishing an equivalent result by using other variables.");
2883 Vafter_change_function
= Qnil
;
2885 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
2886 "List of functions to call before each text change.\n\
2887 Two arguments are passed to each function: the positions of\n\
2888 the beginning and end of the range of old text to be changed.\n\
2889 \(For an insertion, the beginning and end are at the same place.)\n\
2890 No information is given about the length of the text after the change.\n\
2892 Buffer changes made while executing the `before-change-functions'\n\
2893 don't call any before-change or after-change functions.\n\
2894 That's because these variables are temporarily set to nil.\n\
2895 As a result, a hook function cannot straightforwardly alter the value of\n\
2896 these variables. See the Emacs Lisp manual for a way of\n\
2897 accomplishing an equivalent result by using other variables.");
2898 Vbefore_change_functions
= Qnil
;
2900 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
2901 "List of function to call after each text change.\n\
2902 Three arguments are passed to each function: the positions of\n\
2903 the beginning and end of the range of changed text,\n\
2904 and the length of the pre-change text replaced by that range.\n\
2905 \(For an insertion, the pre-change length is zero;\n\
2906 for a deletion, that length is the number of characters deleted,\n\
2907 and the post-change beginning and end are at the same place.)\n\
2909 Buffer changes made while executing the `after-change-functions'\n\
2910 don't call any before-change or after-change functions.\n\
2911 That's because these variables are temporarily set to nil.\n\
2912 As a result, a hook function cannot straightforwardly alter the value of\n\
2913 these variables. See the Emacs Lisp manual for a way of\n\
2914 accomplishing an equivalent result by using other variables.");
2916 Vafter_change_functions
= Qnil
;
2918 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2919 "A list of functions to call before changing a buffer which is unmodified.\n\
2920 The functions are run using the `run-hooks' function.");
2921 Vfirst_change_hook
= Qnil
;
2922 Qfirst_change_hook
= intern ("first-change-hook");
2923 staticpro (&Qfirst_change_hook
);
2925 #if 0 /* The doc string is too long for some compilers,
2926 but make-docfile can find it in this comment. */
2927 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2928 "List of undo entries in current buffer.\n\
2929 Recent changes come first; older changes follow newer.\n\
2931 An entry (START . END) represents an insertion which begins at\n\
2932 position START and ends at position END.\n\
2934 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2935 from (abs POSITION). If POSITION is positive, point was at the front\n\
2936 of the text being deleted; if negative, point was at the end.\n\
2938 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2939 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2940 16-bit words of the buffer's modification count at the time. If the\n\
2941 modification count of the most recent save is different, this entry is\n\
2944 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2945 was modified between BEG and END. PROP is the property name,\n\
2946 and VAL is the old value.\n\
2948 An entry of the form POSITION indicates that point was at the buffer\n\
2949 location given by the integer. Undoing an entry of this form places\n\
2950 point at POSITION.\n\
2952 nil marks undo boundaries. The undo command treats the changes\n\
2953 between two undo boundaries as a single step to be undone.\n\
2955 If the value of the variable is t, undo information is not recorded.");
2957 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2960 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2961 "Non-nil means the mark and region are currently active in this buffer.\n\
2962 Automatically local in all buffers.");
2964 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2965 "*Non-nil means deactivate the mark when the buffer contents change.");
2966 Vtransient_mark_mode
= Qnil
;
2968 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2969 "*Non-nil means disregard read-only status of buffers or characters.\n\
2970 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2971 text properties. If the value is a list, disregard `buffer-read-only'\n\
2972 and disregard a `read-only' text property if the property value\n\
2973 is a member of the list.");
2974 Vinhibit_read_only
= Qnil
;
2976 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
2977 "List of functions called with no args to query before killing a buffer.");
2978 Vkill_buffer_query_functions
= Qnil
;
2980 defsubr (&Sbuffer_list
);
2981 defsubr (&Sget_buffer
);
2982 defsubr (&Sget_file_buffer
);
2983 defsubr (&Sget_buffer_create
);
2984 defsubr (&Sgenerate_new_buffer_name
);
2985 defsubr (&Sbuffer_name
);
2986 /*defsubr (&Sbuffer_number);*/
2987 defsubr (&Sbuffer_file_name
);
2988 defsubr (&Sbuffer_local_variables
);
2989 defsubr (&Sbuffer_modified_p
);
2990 defsubr (&Sset_buffer_modified_p
);
2991 defsubr (&Sbuffer_modified_tick
);
2992 defsubr (&Srename_buffer
);
2993 defsubr (&Sother_buffer
);
2994 defsubr (&Sbuffer_disable_undo
);
2995 defsubr (&Sbuffer_enable_undo
);
2996 defsubr (&Skill_buffer
);
2997 defsubr (&Serase_buffer
);
2998 defsubr (&Sswitch_to_buffer
);
2999 defsubr (&Spop_to_buffer
);
3000 defsubr (&Scurrent_buffer
);
3001 defsubr (&Sset_buffer
);
3002 defsubr (&Sbarf_if_buffer_read_only
);
3003 defsubr (&Sbury_buffer
);
3004 defsubr (&Slist_buffers
);
3005 defsubr (&Skill_all_local_variables
);
3007 defsubr (&Soverlayp
);
3008 defsubr (&Smake_overlay
);
3009 defsubr (&Sdelete_overlay
);
3010 defsubr (&Smove_overlay
);
3011 defsubr (&Soverlay_start
);
3012 defsubr (&Soverlay_end
);
3013 defsubr (&Soverlay_buffer
);
3014 defsubr (&Soverlay_properties
);
3015 defsubr (&Soverlays_at
);
3016 defsubr (&Snext_overlay_change
);
3017 defsubr (&Sprevious_overlay_change
);
3018 defsubr (&Soverlay_recenter
);
3019 defsubr (&Soverlay_lists
);
3020 defsubr (&Soverlay_get
);
3021 defsubr (&Soverlay_put
);
3026 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
3027 initial_define_key (control_x_map
, 'k', "kill-buffer");
3028 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");
3030 /* This must not be in syms_of_buffer, because Qdisabled is not
3031 initialized when that function gets called. */
3032 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);