1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993
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"
39 #include "blockinput.h"
41 struct buffer
*current_buffer
; /* the current buffer */
43 /* First buffer in chain of all buffers (in reverse order of creation).
44 Threaded through ->next. */
46 struct buffer
*all_buffers
;
48 /* This structure holds the default values of the buffer-local variables
49 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
50 The default value occupies the same slot in this structure
51 as an individual buffer's value occupies in that buffer.
52 Setting the default value also goes through the alist of buffers
53 and stores into each buffer that does not say it has a local value. */
55 struct buffer buffer_defaults
;
57 /* A Lisp_Object pointer to the above, used for staticpro */
59 static Lisp_Object Vbuffer_defaults
;
61 /* This structure marks which slots in a buffer have corresponding
62 default values in buffer_defaults.
63 Each such slot has a nonzero value in this structure.
64 The value has only one nonzero bit.
66 When a buffer has its own local value for a slot,
67 the bit for that slot (found in the same slot in this structure)
68 is turned on in the buffer's local_var_flags slot.
70 If a slot in this structure is -1, then even though there may
71 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
72 and the corresponding slot in buffer_defaults is not used.
74 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
75 but there is a default value which is copied into each buffer.
77 If a slot in this structure is negative, then even though there may
78 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
79 and the corresponding slot in buffer_defaults is not used.
81 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
82 zero, that is a bug */
84 struct buffer buffer_local_flags
;
86 /* This structure holds the names of symbols whose values may be
87 buffer-local. It is indexed and accessed in the same way as the above. */
89 struct buffer buffer_local_symbols
;
90 /* A Lisp_Object pointer to the above, used for staticpro */
91 static Lisp_Object Vbuffer_local_symbols
;
93 /* This structure holds the required types for the values in the
94 buffer-local slots. If a slot contains Qnil, then the
95 corresponding buffer slot may contain a value of any type. If a
96 slot contains an integer, then prospective values' tags must be
97 equal to that integer. When a tag does not match, the function
98 buffer_slot_type_mismatch will signal an error. */
99 struct buffer buffer_local_types
;
101 Lisp_Object
Fset_buffer ();
102 void set_buffer_internal ();
103 static void call_overlay_mod_hooks ();
105 /* Alist of all buffer names vs the buffers. */
106 /* This used to be a variable, but is no longer,
107 to prevent lossage due to user rplac'ing this alist or its elements. */
108 Lisp_Object Vbuffer_alist
;
110 /* Functions to call before and after each text change. */
111 Lisp_Object Vbefore_change_function
;
112 Lisp_Object Vafter_change_function
;
114 Lisp_Object Vtransient_mark_mode
;
116 /* t means ignore all read-only text properties.
117 A list means ignore such a property if its value is a member of the list.
118 Any non-nil value means ignore buffer-read-only. */
119 Lisp_Object Vinhibit_read_only
;
121 /* List of functions to call before changing an unmodified buffer. */
122 Lisp_Object Vfirst_change_hook
;
123 Lisp_Object Qfirst_change_hook
;
125 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
127 Lisp_Object Qprotected_field
;
129 Lisp_Object QSFundamental
; /* A string "Fundamental" */
131 Lisp_Object Qkill_buffer_hook
;
133 Lisp_Object Qoverlayp
;
135 Lisp_Object Qmodification_hooks
;
136 Lisp_Object Qinsert_in_front_hooks
;
137 Lisp_Object Qinsert_behind_hooks
;
139 /* For debugging; temporary. See set_buffer_internal. */
140 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
145 if (XTYPE (spec
) == Lisp_String
)
146 error ("No buffer named %s", XSTRING (spec
)->data
);
147 error ("Invalid buffer argument");
150 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
151 "Return a list of all existing live buffers.")
154 return Fmapcar (Qcdr
, Vbuffer_alist
);
157 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
158 "Return the buffer named NAME (a string).\n\
159 If there is no live buffer named NAME, return nil.\n\
160 NAME may also be a buffer; if so, the value is that buffer.")
162 register Lisp_Object name
;
164 if (XTYPE (name
) == Lisp_Buffer
)
166 CHECK_STRING (name
, 0);
168 return Fcdr (Fassoc (name
, Vbuffer_alist
));
171 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
172 "Return the buffer visiting file FILENAME (a string).\n\
173 If there is no such live buffer, return nil.")
175 register Lisp_Object filename
;
177 register Lisp_Object tail
, buf
, tem
;
178 CHECK_STRING (filename
, 0);
179 filename
= Fexpand_file_name (filename
, Qnil
);
181 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
183 buf
= Fcdr (XCONS (tail
)->car
);
184 if (XTYPE (buf
) != Lisp_Buffer
) continue;
185 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
186 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
193 /* Incremented for each buffer created, to assign the buffer number. */
196 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
197 "Return the buffer named NAME, or create such a buffer and return it.\n\
198 A new buffer is created if there is no live buffer named NAME.\n\
199 If NAME starts with a space, the new buffer does not keep undo information.\n\
200 If NAME is a buffer instead of a string, then it is the value returned.\n\
201 The value is never nil.")
203 register Lisp_Object name
;
205 register Lisp_Object buf
, function
, tem
;
206 int count
= specpdl_ptr
- specpdl
;
207 register struct buffer
*b
;
209 buf
= Fget_buffer (name
);
213 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
215 BUF_GAP_SIZE (b
) = 20;
217 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
219 if (! BUF_BEG_ADDR (b
))
229 /* Put this on the chain of all buffers including killed ones. */
230 b
->next
= all_buffers
;
233 b
->mark
= Fmake_marker ();
234 /*b->number = make_number (++buffer_count);*/
236 if (XSTRING (name
)->data
[0] != ' ')
243 /* Put this in the alist of all live buffers. */
244 XSET (buf
, Lisp_Buffer
, b
);
245 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
247 b
->mark
= Fmake_marker ();
251 function
= buffer_defaults
.major_mode
;
254 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
256 function
= current_buffer
->major_mode
;
259 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
262 /* To select a nonfundamental mode,
263 select the buffer temporarily and then call the mode function. */
265 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
270 return unbind_to (count
, buf
);
273 /* Reinitialize everything about a buffer except its name and contents. */
277 register struct buffer
*b
;
280 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
282 b
->save_modified
= 1;
283 XFASTINT (b
->save_length
) = 0;
284 b
->last_window_start
= 1;
286 b
->auto_save_modified
= 0;
287 b
->auto_save_file_name
= Qnil
;
289 b
->overlays_before
= Qnil
;
290 b
->overlays_after
= Qnil
;
291 XFASTINT (b
->overlay_center
) = 1;
292 b
->mark_active
= Qnil
;
294 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
295 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
297 reset_buffer_local_variables(b
);
300 reset_buffer_local_variables (b
)
301 register struct buffer
*b
;
305 /* Reset the major mode to Fundamental, together with all the
306 things that depend on the major mode.
307 default-major-mode is handled at a higher level.
308 We ignore it here. */
309 b
->major_mode
= Qfundamental_mode
;
311 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
312 b
->mode_name
= QSFundamental
;
313 b
->minor_modes
= Qnil
;
314 b
->downcase_table
= Vascii_downcase_table
;
315 b
->upcase_table
= Vascii_upcase_table
;
316 b
->case_canon_table
= Vascii_downcase_table
;
317 b
->case_eqv_table
= Vascii_upcase_table
;
319 b
->sort_table
= XSTRING (Vascii_sort_table
);
320 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
323 /* Reset all per-buffer variables to their defaults. */
324 b
->local_var_alist
= Qnil
;
325 b
->local_var_flags
= 0;
327 /* For each slot that has a default value,
328 copy that into the slot. */
330 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
331 offset
< sizeof (struct buffer
);
332 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
333 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
334 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
335 *(Lisp_Object
*)(offset
+ (char *)b
) =
336 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
339 /* We split this away from generate-new-buffer, because rename-buffer
340 and set-visited-file-name ought to be able to use this to really
341 rename the buffer properly. */
343 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
345 "Return a string that is the name of no existing buffer based on NAME.\n\
346 If there is no live buffer named NAME, then return NAME.\n\
347 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
348 until an unused name is found, and then return that name.\n\
349 Optional second argument IGNORE specifies a name that is okay to use\n\
350 \(if it is in the sequence to be tried)\n\
351 even if a buffer with that name exists.")
353 register Lisp_Object name
, ignore
;
355 register Lisp_Object gentemp
, tem
;
359 CHECK_STRING (name
, 0);
361 tem
= Fget_buffer (name
);
368 sprintf (number
, "<%d>", ++count
);
369 gentemp
= concat2 (name
, build_string (number
));
370 tem
= Fstring_equal (gentemp
, ignore
);
373 tem
= Fget_buffer (gentemp
);
380 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
381 "Return the name of BUFFER, as a string.\n\
382 With no argument or nil as argument, return the name of the current buffer.")
384 register Lisp_Object buffer
;
387 return current_buffer
->name
;
388 CHECK_BUFFER (buffer
, 0);
389 return XBUFFER (buffer
)->name
;
392 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
393 "Return name of file BUFFER is visiting, or nil if none.\n\
394 No argument or nil as argument means use the current buffer.")
396 register Lisp_Object buffer
;
399 return current_buffer
->filename
;
400 CHECK_BUFFER (buffer
, 0);
401 return XBUFFER (buffer
)->filename
;
404 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
405 Sbuffer_local_variables
, 0, 1, 0,
406 "Return an alist of variables that are buffer-local in BUFFER.\n\
407 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
408 For a symbol that is locally unbound, just the symbol appears in the value.\n\
409 Note that storing new VALUEs in these elements doesn't change the variables.\n\
410 No argument or nil as argument means use current buffer as BUFFER.")
412 register Lisp_Object buffer
;
414 register struct buffer
*buf
;
415 register Lisp_Object result
;
418 buf
= current_buffer
;
421 CHECK_BUFFER (buffer
, 0);
422 buf
= XBUFFER (buffer
);
428 /* Reference each variable in the alist in our current buffer.
429 If inquiring about the current buffer, this gets the current values,
430 so store them into the alist so the alist is up to date.
431 If inquiring about some other buffer, this swaps out any values
432 for that buffer, making the alist up to date automatically. */
433 register Lisp_Object tail
;
434 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
436 Lisp_Object val
, elt
;
438 elt
= XCONS (tail
)->car
;
440 if (buf
== current_buffer
)
441 val
= find_symbol_value (XCONS (elt
)->car
);
443 val
= XCONS (elt
)->cdr
;
445 /* If symbol is unbound, put just the symbol in the list. */
446 if (EQ (val
, Qunbound
))
447 result
= Fcons (XCONS (elt
)->car
, result
);
448 /* Otherwise, put (symbol . value) in the list. */
450 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
454 /* Add on all the variables stored in special slots. */
456 register int offset
, mask
;
458 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
459 offset
< sizeof (struct buffer
);
460 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
462 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
463 if (mask
== -1 || (buf
->local_var_flags
& mask
))
464 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
466 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
467 *(Lisp_Object
*)(offset
+ (char *)buf
)),
476 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
478 "Return t if BUFFER was modified since its file was last read or saved.\n\
479 No argument or nil as argument means use current buffer as BUFFER.")
481 register Lisp_Object buffer
;
483 register struct buffer
*buf
;
485 buf
= current_buffer
;
488 CHECK_BUFFER (buffer
, 0);
489 buf
= XBUFFER (buffer
);
492 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
495 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
497 "Mark current buffer as modified or unmodified according to FLAG.\n\
498 A non-nil FLAG means mark the buffer modified.")
500 register Lisp_Object flag
;
502 register int already
;
503 register Lisp_Object fn
;
505 #ifdef CLASH_DETECTION
506 /* If buffer becoming modified, lock the file.
507 If buffer becoming unmodified, unlock the file. */
509 fn
= current_buffer
->filename
;
512 already
= current_buffer
->save_modified
< MODIFF
;
513 if (!already
&& !NILP (flag
))
515 else if (already
&& NILP (flag
))
518 #endif /* CLASH_DETECTION */
520 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
525 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
527 "Return BUFFER's tick counter, incremented for each change in text.\n\
528 Each buffer has a tick counter which is incremented each time the text in\n\
529 that buffer is changed. It wraps around occasionally.\n\
530 No argument or nil as argument means use current buffer as BUFFER.")
532 register Lisp_Object buffer
;
534 register struct buffer
*buf
;
536 buf
= current_buffer
;
539 CHECK_BUFFER (buffer
, 0);
540 buf
= XBUFFER (buffer
);
543 return make_number (BUF_MODIFF (buf
));
546 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
547 "sRename buffer (to new name): \nP",
548 "Change current buffer's name to NEWNAME (a string).\n\
549 If second arg UNIQUE is nil or omitted, it is an error if a\n\
550 buffer named NEWNAME already exists.\n\
551 If UNIQUE is non-nil, come up with a new name using\n\
552 `generate-new-buffer-name'.\n\
553 Interactively, you can set UNIQUE with a prefix argument.\n\
554 We return the name we actually gave the buffer.\n\
555 This does not change the name of the visited file (if any).")
557 register Lisp_Object name
, unique
;
559 register Lisp_Object tem
, buf
;
561 CHECK_STRING (name
, 0);
562 tem
= Fget_buffer (name
);
563 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
564 the buffer automatically so you can create another with the original name.
565 It makes UNIQUE equivalent to
566 (rename-buffer (generate-new-buffer-name NAME)). */
567 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
568 return current_buffer
->name
;
572 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
574 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
577 current_buffer
->name
= name
;
579 /* Catch redisplay's attention. Unless we do this, the mode lines for
580 any windows displaying current_buffer will stay unchanged. */
583 XSET (buf
, Lisp_Buffer
, current_buffer
);
584 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
585 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
586 call0 (intern ("rename-auto-save-file"));
590 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
591 "Return most recently selected buffer other than BUFFER.\n\
592 Buffers not visible in windows are preferred to visible buffers,\n\
593 unless optional second argument VISIBLE-OK is non-nil.\n\
594 If no other buffer exists, the buffer `*scratch*' is returned.\n\
595 If BUFFER is omitted or nil, some interesting buffer is returned.")
597 register Lisp_Object buffer
, visible_ok
;
599 register Lisp_Object tail
, buf
, notsogood
, tem
;
602 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
604 buf
= Fcdr (Fcar (tail
));
605 if (EQ (buf
, buffer
))
607 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
609 if (NILP (visible_ok
))
610 tem
= Fget_buffer_window (buf
, Qt
);
615 if (NILP (notsogood
))
618 if (!NILP (notsogood
))
620 return Fget_buffer_create (build_string ("*scratch*"));
623 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 1,1,
625 "Make BUFFER stop keeping undo information.")
627 register Lisp_Object buffer
;
629 Lisp_Object real_buffer
;
632 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
635 real_buffer
= Fget_buffer (buffer
);
636 if (NILP (real_buffer
))
640 XBUFFER (real_buffer
)->undo_list
= Qt
;
645 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
647 "Start keeping undo information for buffer BUFFER.\n\
648 No argument or nil as argument means do this for the current buffer.")
650 register Lisp_Object buffer
;
652 Lisp_Object real_buffer
;
655 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
658 real_buffer
= Fget_buffer (buffer
);
659 if (NILP (real_buffer
))
663 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
664 XBUFFER (real_buffer
)->undo_list
= Qnil
;
670 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
671 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
672 The buffer being killed will be current while the hook is running.\n\
675 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
676 "Kill the buffer BUFFER.\n\
677 The argument may be a buffer or may be the name of a buffer.\n\
678 An argument of nil means kill the current buffer.\n\n\
679 Value is t if the buffer is actually killed, nil if user says no.\n\n\
680 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
681 if not void, is a list of functions to be called, with no arguments,\n\
682 before the buffer is actually killed. The buffer to be killed is current\n\
683 when the hook functions are called.\n\n\
684 Any processes that have this buffer as the `process-buffer' are killed\n\
685 with `delete-process'.")
690 register struct buffer
*b
;
691 register Lisp_Object tem
;
692 register struct Lisp_Marker
*m
;
693 struct gcpro gcpro1
, gcpro2
;
696 buf
= Fcurrent_buffer ();
698 buf
= Fget_buffer (bufname
);
704 /* Query if the buffer is still modified. */
705 if (INTERACTIVE
&& !NILP (b
->filename
)
706 && BUF_MODIFF (b
) > b
->save_modified
)
708 GCPRO2 (buf
, bufname
);
709 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
710 XSTRING (b
->name
)->data
));
716 /* Run kill-buffer hook with the buffer to be killed the current buffer. */
718 register Lisp_Object val
;
719 int count
= specpdl_ptr
- specpdl
;
721 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
722 set_buffer_internal (b
);
723 call1 (Vrun_hooks
, Qkill_buffer_hook
);
724 unbind_to (count
, Qnil
);
727 /* We have no more questions to ask. Verify that it is valid
728 to kill the buffer. This must be done after the questions
729 since anything can happen within do_yes_or_no_p. */
731 /* Don't kill the minibuffer now current. */
732 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
738 /* Make this buffer not be current.
739 In the process, notice if this is the sole visible buffer
740 and give up if so. */
741 if (b
== current_buffer
)
743 tem
= Fother_buffer (buf
, Qnil
);
745 if (b
== current_buffer
)
749 /* Now there is no question: we can kill the buffer. */
751 #ifdef CLASH_DETECTION
752 /* Unlock this buffer's file, if it is locked. */
754 #endif /* CLASH_DETECTION */
756 kill_buffer_processes (buf
);
760 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
761 Freplace_buffer_in_windows (buf
);
764 /* Delete any auto-save file. */
765 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
768 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
770 unlink (XSTRING (b
->auto_save_file_name
)->data
);
773 /* Unchain all markers of this buffer
774 and leave them pointing nowhere. */
775 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
784 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
785 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
786 /* Perhaps we should explicitly free the interval tree here... */
790 BUFFER_FREE (BUF_BEG_ADDR (b
));
797 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
798 we do this each time BUF is selected visibly, the more recently
799 selected buffers are always closer to the front of the list. This
800 means that other_buffer is more likely to choose a relevant buffer. */
805 register Lisp_Object link
, prev
;
808 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
810 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
815 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
816 we cannot use Fdelq itself here because it allows quitting. */
819 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
821 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
823 XCONS(link
)->cdr
= Vbuffer_alist
;
824 Vbuffer_alist
= link
;
827 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
828 "Select buffer BUFFER in the current window.\n\
829 BUFFER may be a buffer or a buffer name.\n\
830 Optional second arg NORECORD non-nil means\n\
831 do not put this buffer at the front of the list of recently selected ones.\n\
833 WARNING: This is NOT the way to work on another buffer temporarily\n\
834 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
835 the window-buffer correspondences.")
837 Lisp_Object bufname
, norecord
;
839 register Lisp_Object buf
;
842 if (EQ (minibuf_window
, selected_window
))
843 error ("Cannot switch buffers in minibuffer window");
844 tem
= Fwindow_dedicated_p (selected_window
);
846 error ("Cannot switch buffers in a dedicated window");
849 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
851 buf
= Fget_buffer_create (bufname
);
856 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
857 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
864 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
865 "Select buffer BUFFER in some window, preferably a different one.\n\
866 If BUFFER is nil, then some other buffer is chosen.\n\
867 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
868 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
869 window even if BUFFER is already visible in the selected window.")
871 Lisp_Object bufname
, other
;
873 register Lisp_Object buf
;
875 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
877 buf
= Fget_buffer_create (bufname
);
880 Fselect_window (Fdisplay_buffer (buf
, other
));
884 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
885 "Return the current buffer as a Lisp object.")
888 register Lisp_Object buf
;
889 XSET (buf
, Lisp_Buffer
, current_buffer
);
893 /* Set the current buffer to b */
896 set_buffer_internal (b
)
897 register struct buffer
*b
;
899 register struct buffer
*old_buf
;
900 register Lisp_Object tail
, valcontents
;
903 if (current_buffer
== b
)
906 windows_or_buffers_changed
= 1;
907 old_buf
= current_buffer
;
909 last_known_column_point
= -1; /* invalidate indentation cache */
911 /* Look down buffer's list of local Lisp variables
912 to find and update any that forward into C variables. */
914 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
916 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
917 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
918 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
919 && (tem
= XTYPE (XCONS (valcontents
)->car
),
920 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
921 || tem
== Lisp_Objfwd
)))
922 /* Just reference the variable
923 to cause it to become set for this buffer. */
924 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
927 /* Do the same with any others that were local to the previous buffer */
930 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
932 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
933 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
934 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
935 && (tem
= XTYPE (XCONS (valcontents
)->car
),
936 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
937 || tem
== Lisp_Objfwd
)))
938 /* Just reference the variable
939 to cause it to become set for this buffer. */
940 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
944 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
945 "Make the buffer BUFFER current for editing operations.\n\
946 BUFFER may be a buffer or the name of an existing buffer.\n\
947 See also `save-excursion' when you want to make a buffer current temporarily.\n\
948 This function does not display the buffer, so its effect ends\n\
949 when the current command terminates.\n\
950 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
952 register Lisp_Object bufname
;
954 register Lisp_Object buffer
;
955 buffer
= Fget_buffer (bufname
);
958 if (NILP (XBUFFER (buffer
)->name
))
959 error ("Selecting deleted buffer");
960 set_buffer_internal (XBUFFER (buffer
));
964 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
965 Sbarf_if_buffer_read_only
, 0, 0, 0,
966 "Signal a `buffer-read-only' error if the current buffer is read-only.")
969 if (!NILP (current_buffer
->read_only
)
970 && NILP (Vinhibit_read_only
))
971 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
975 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
976 "Put BUFFER at the end of the list of all buffers.\n\
977 There it is the least likely candidate for `other-buffer' to return;\n\
978 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
979 If BUFFER is nil or omitted, bury the current buffer.\n\
980 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
981 selected window if it is displayed there.")
983 register Lisp_Object buf
;
985 /* Figure out what buffer we're going to bury. */
988 XSET (buf
, Lisp_Buffer
, current_buffer
);
990 /* If we're burying the current buffer, unshow it. */
991 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
997 buf1
= Fget_buffer (buf
);
1003 /* Move buf to the end of the buffer list. */
1005 register Lisp_Object aelt
, link
;
1007 aelt
= Frassq (buf
, Vbuffer_alist
);
1008 link
= Fmemq (aelt
, Vbuffer_alist
);
1009 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1010 XCONS (link
)->cdr
= Qnil
;
1011 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1017 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1018 "Delete the entire contents of the current buffer.\n\
1019 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1020 so the buffer is truly empty after this.")
1025 current_buffer
->last_window_start
= 1;
1026 /* Prevent warnings, or suspension of auto saving, that would happen
1027 if future size is less than past size. Use of erase-buffer
1028 implies that the future text is not really related to the past text. */
1029 XFASTINT (current_buffer
->save_length
) = 0;
1033 validate_region (b
, e
)
1034 register Lisp_Object
*b
, *e
;
1038 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1039 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1041 if (XINT (*b
) > XINT (*e
))
1043 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1045 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1048 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1049 && XINT (*e
) <= ZV
))
1050 args_out_of_range (*b
, *e
);
1054 list_buffers_1 (files
)
1057 register Lisp_Object tail
, tem
, buf
;
1058 Lisp_Object col1
, col2
, col3
, minspace
;
1059 register struct buffer
*old
= current_buffer
, *b
;
1060 Lisp_Object desired_point
;
1061 Lisp_Object other_file_symbol
;
1063 desired_point
= Qnil
;
1064 other_file_symbol
= intern ("list-buffers-directory");
1066 XFASTINT (col1
) = 19;
1067 XFASTINT (col2
) = 25;
1068 XFASTINT (col3
) = 40;
1069 XFASTINT (minspace
) = 1;
1071 Fset_buffer (Vstandard_output
);
1073 tail
= intern ("Buffer-menu-mode");
1074 if (!EQ (tail
, current_buffer
->major_mode
)
1075 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1077 Fbuffer_disable_undo (Vstandard_output
);
1078 current_buffer
->read_only
= Qnil
;
1081 MR Buffer Size Mode File\n\
1082 -- ------ ---- ---- ----\n", -1);
1084 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1086 buf
= Fcdr (Fcar (tail
));
1088 /* Don't mention the minibuffers. */
1089 if (XSTRING (b
->name
)->data
[0] == ' ')
1091 /* Optionally don't mention buffers that lack files. */
1092 if (!NILP (files
) && NILP (b
->filename
))
1094 /* Identify the current buffer. */
1096 XFASTINT (desired_point
) = point
;
1097 write_string (b
== old
? "." : " ", -1);
1098 /* Identify modified buffers */
1099 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1100 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1101 Fprinc (b
->name
, Qnil
);
1102 Findent_to (col1
, make_number (2));
1103 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1105 Findent_to (col2
, minspace
);
1106 Fprinc (b
->mode_name
, Qnil
);
1107 Findent_to (col3
, minspace
);
1109 if (!NILP (b
->filename
))
1110 Fprinc (b
->filename
, Qnil
);
1113 /* No visited file; check local value of list-buffers-directory. */
1115 set_buffer_internal (b
);
1116 tem
= Fboundp (other_file_symbol
);
1119 tem
= Fsymbol_value (other_file_symbol
);
1120 Fset_buffer (Vstandard_output
);
1121 if (XTYPE (tem
) == Lisp_String
)
1125 Fset_buffer (Vstandard_output
);
1127 write_string ("\n", -1);
1130 current_buffer
->read_only
= Qt
;
1131 set_buffer_internal (old
);
1132 return desired_point
;
1135 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1136 "Display a list of names of existing buffers.\n\
1137 The list is displayed in a buffer named `*Buffer List*'.\n\
1138 Note that buffers with names starting with spaces are omitted.\n\
1139 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1141 The M column contains a * for buffers that are modified.\n\
1142 The R column contains a % for buffers that are read-only.")
1146 Lisp_Object desired_point
;
1149 = internal_with_output_to_temp_buffer ("*Buffer List*",
1150 list_buffers_1
, files
);
1152 if (NUMBERP (desired_point
))
1154 int count
= specpdl_ptr
- specpdl
;
1155 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1156 Fset_buffer (build_string ("*Buffer List*"));
1157 SET_PT (XINT (desired_point
));
1158 return unbind_to (count
, Qnil
);
1163 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1165 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1166 Most local variable bindings are eliminated so that the default values\n\
1167 become effective once more. Also, the syntax table is set from\n\
1168 `standard-syntax-table', the local keymap is set to nil,\n\
1169 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1170 This function also forces redisplay of the mode line.\n\
1172 Every function to select a new major mode starts by\n\
1173 calling this function.\n\n\
1174 As a special exception, local variables whose names have\n\
1175 a non-nil `permanent-local' property are not eliminated by this function.")
1178 register Lisp_Object alist
, sym
, tem
;
1180 oalist
= current_buffer
->local_var_alist
;
1182 /* Make sure no local variables remain set up with this buffer
1183 for their current values. */
1185 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1187 sym
= XCONS (XCONS (alist
)->car
)->car
;
1189 /* Need not do anything if some other buffer's binding is now encached. */
1190 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1191 if (XBUFFER (tem
) == current_buffer
)
1193 /* Symbol is set up for this buffer's old local value.
1194 Set it up for the current buffer with the default value. */
1196 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1197 /* Store the symbol's current value into the alist entry
1198 it is currently set up for. This is so that, if the
1199 local is marked permanent, and we make it local again below,
1200 we don't lose the value. */
1201 XCONS (XCONS (tem
)->car
)->cdr
= XCONS (XSYMBOL (sym
)->value
)->car
;
1202 /* Switch to the symbol's default-value alist entry. */
1203 XCONS (tem
)->car
= tem
;
1204 /* Mark it as current for the current buffer. */
1205 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1206 /* Store the current value into any forwarding in the symbol. */
1207 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1212 /* Actually eliminate all local bindings of this buffer. */
1214 reset_buffer_local_variables (current_buffer
);
1216 /* Redisplay mode lines; we are changing major mode. */
1218 update_mode_lines
++;
1220 /* Any which are supposed to be permanent,
1221 make local again, with the same values they had. */
1223 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1225 sym
= XCONS (XCONS (alist
)->car
)->car
;
1226 tem
= Fget (sym
, Qpermanent_local
);
1229 Fmake_local_variable (sym
);
1230 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1234 /* Force mode-line redisplay. Useful here because all major mode
1235 commands call this function. */
1236 update_mode_lines
++;
1241 /* Find all the overlays in the current buffer that contain position POS.
1242 Return the number found, and store them in a vector in *VEC_PTR.
1243 Store in *LEN_PTR the size allocated for the vector.
1244 Store in *NEXT_PTR the next position after POS where an overlay starts,
1245 or ZV if there are no more overlays.
1247 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1248 when this function is called.
1250 If EXTEND is non-zero, we make the vector bigger if necessary.
1251 If EXTEND is zero, we never extend the vector,
1252 and we store only as many overlays as will fit.
1253 But we still return the total number of overlays. */
1256 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1259 Lisp_Object
**vec_ptr
;
1263 Lisp_Object tail
, overlay
, start
, end
, result
;
1266 Lisp_Object
*vec
= *vec_ptr
;
1268 int inhibit_storing
= 0;
1270 for (tail
= current_buffer
->overlays_before
;
1272 tail
= XCONS (tail
)->cdr
)
1276 overlay
= XCONS (tail
)->car
;
1277 if (! OVERLAY_VALID (overlay
))
1280 start
= OVERLAY_START (overlay
);
1281 end
= OVERLAY_END (overlay
);
1282 if (OVERLAY_POSITION (end
) <= pos
)
1284 startpos
= OVERLAY_POSITION (start
);
1285 if (startpos
<= pos
)
1289 /* The supplied vector is full.
1290 Either make it bigger, or don't store any more in it. */
1293 *len_ptr
= len
*= 2;
1294 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1298 inhibit_storing
= 1;
1301 if (!inhibit_storing
)
1303 /* Keep counting overlays even if we can't return them all. */
1306 else if (startpos
< next
)
1310 for (tail
= current_buffer
->overlays_after
;
1312 tail
= XCONS (tail
)->cdr
)
1316 overlay
= XCONS (tail
)->car
;
1317 if (! OVERLAY_VALID (overlay
))
1320 start
= OVERLAY_START (overlay
);
1321 end
= OVERLAY_END (overlay
);
1322 startpos
= OVERLAY_POSITION (start
);
1325 if (startpos
< next
)
1329 if (pos
< OVERLAY_POSITION (end
))
1335 *len_ptr
= len
*= 2;
1336 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1340 inhibit_storing
= 1;
1343 if (!inhibit_storing
)
1353 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1356 recenter_overlay_lists (buf
, pos
)
1360 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1362 /* See if anything in overlays_before should move to overlays_after. */
1364 /* We don't strictly need prev in this loop; it should always be nil.
1365 But we use it for symmetry and in case that should cease to be true
1366 with some future change. */
1368 for (tail
= buf
->overlays_before
;
1370 prev
= tail
, tail
= next
)
1372 next
= XCONS (tail
)->cdr
;
1373 overlay
= XCONS (tail
)->car
;
1375 /* If the overlay is not valid, get rid of it. */
1376 if (!OVERLAY_VALID (overlay
))
1381 /* Splice the cons cell TAIL out of overlays_before. */
1383 XCONS (prev
)->cdr
= next
;
1385 buf
->overlays_before
= next
;
1391 beg
= OVERLAY_START (overlay
);
1392 end
= OVERLAY_END (overlay
);
1394 if (OVERLAY_POSITION (end
) > pos
)
1396 /* OVERLAY needs to be moved. */
1397 int where
= OVERLAY_POSITION (beg
);
1398 Lisp_Object other
, other_prev
;
1400 /* Splice the cons cell TAIL out of overlays_before. */
1402 XCONS (prev
)->cdr
= next
;
1404 buf
->overlays_before
= next
;
1406 /* Search thru overlays_after for where to put it. */
1408 for (other
= buf
->overlays_after
;
1410 other_prev
= other
, other
= XCONS (other
)->cdr
)
1412 Lisp_Object otherbeg
, otheroverlay
, follower
;
1415 otheroverlay
= XCONS (other
)->car
;
1416 if (! OVERLAY_VALID (otheroverlay
))
1419 otherbeg
= OVERLAY_START (otheroverlay
);
1420 if (OVERLAY_POSITION (otherbeg
) >= where
)
1424 /* Add TAIL to overlays_after before OTHER. */
1425 XCONS (tail
)->cdr
= other
;
1426 if (!NILP (other_prev
))
1427 XCONS (other_prev
)->cdr
= tail
;
1429 buf
->overlays_after
= tail
;
1433 /* We've reached the things that should stay in overlays_before.
1434 All the rest of overlays_before must end even earlier,
1439 /* See if anything in overlays_after should be in overlays_before. */
1441 for (tail
= buf
->overlays_after
;
1443 prev
= tail
, tail
= next
)
1445 next
= XCONS (tail
)->cdr
;
1446 overlay
= XCONS (tail
)->car
;
1448 /* If the overlay is not valid, get rid of it. */
1449 if (!OVERLAY_VALID (overlay
))
1454 /* Splice the cons cell TAIL out of overlays_after. */
1456 XCONS (prev
)->cdr
= next
;
1458 buf
->overlays_after
= next
;
1464 beg
= OVERLAY_START (overlay
);
1465 end
= OVERLAY_END (overlay
);
1467 /* Stop looking, when we know that nothing further
1468 can possibly end before POS. */
1469 if (OVERLAY_POSITION (beg
) > pos
)
1472 if (OVERLAY_POSITION (end
) <= pos
)
1474 /* OVERLAY needs to be moved. */
1475 int where
= OVERLAY_POSITION (end
);
1476 Lisp_Object other
, other_prev
;
1478 /* Splice the cons cell TAIL out of overlays_after. */
1480 XCONS (prev
)->cdr
= next
;
1482 buf
->overlays_after
= next
;
1484 /* Search thru overlays_before for where to put it. */
1486 for (other
= buf
->overlays_before
;
1488 other_prev
= other
, other
= XCONS (other
)->cdr
)
1490 Lisp_Object otherend
, otheroverlay
;
1493 otheroverlay
= XCONS (other
)->car
;
1494 if (! OVERLAY_VALID (otheroverlay
))
1497 otherend
= OVERLAY_END (otheroverlay
);
1498 if (OVERLAY_POSITION (otherend
) <= where
)
1502 /* Add TAIL to overlays_before before OTHER. */
1503 XCONS (tail
)->cdr
= other
;
1504 if (!NILP (other_prev
))
1505 XCONS (other_prev
)->cdr
= tail
;
1507 buf
->overlays_before
= tail
;
1512 XFASTINT (buf
->overlay_center
) = pos
;
1515 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1516 "Return t if OBJECT is an overlay.")
1520 return (OVERLAYP (object
) ? Qt
: Qnil
);
1523 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1524 "Create a new overlay with range BEG to END in BUFFER.\n\
1525 If omitted, BUFFER defaults to the current buffer.\n\
1526 BEG and END may be integers or markers.")
1528 Lisp_Object beg
, end
, buffer
;
1530 Lisp_Object overlay
;
1534 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1536 CHECK_BUFFER (buffer
, 2);
1538 && ! EQ (Fmarker_buffer (beg
), buffer
))
1539 error ("Marker points into wrong buffer");
1541 && ! EQ (Fmarker_buffer (end
), buffer
))
1542 error ("Marker points into wrong buffer");
1544 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1545 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1547 if (XINT (beg
) > XINT (end
))
1549 Lisp_Object temp
= beg
;
1550 beg
= end
; end
= temp
;
1553 b
= XBUFFER (buffer
);
1555 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1556 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1558 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1559 XSETTYPE (overlay
, Lisp_Overlay
);
1561 /* Put the new overlay on the wrong list. */
1562 end
= OVERLAY_END (overlay
);
1563 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1564 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1566 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1568 /* This puts it in the right list, and in the right order. */
1569 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1571 /* We don't need to redisplay the region covered by the overlay, because
1572 the overlay has no properties at the moment. */
1577 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1578 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1579 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1580 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1582 (overlay
, beg
, end
, buffer
)
1583 Lisp_Object overlay
, beg
, end
, buffer
;
1585 struct buffer
*b
, *ob
;
1586 Lisp_Object obuffer
;
1587 int count
= specpdl_ptr
- specpdl
;
1589 CHECK_OVERLAY (overlay
, 0);
1591 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1593 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1594 CHECK_BUFFER (buffer
, 3);
1597 && ! EQ (Fmarker_buffer (beg
), buffer
))
1598 error ("Marker points into wrong buffer");
1600 && ! EQ (Fmarker_buffer (end
), buffer
))
1601 error ("Marker points into wrong buffer");
1603 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1604 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1606 specbind (Qinhibit_quit
, Qt
);
1608 if (XINT (beg
) > XINT (end
))
1610 Lisp_Object temp
= beg
;
1611 beg
= end
; end
= temp
;
1614 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1615 b
= XBUFFER (buffer
);
1616 ob
= XBUFFER (obuffer
);
1618 /* If the overlay has changed buffers, do a thorough redisplay. */
1619 if (!EQ (buffer
, obuffer
))
1620 windows_or_buffers_changed
= 1;
1622 /* Redisplay the area the overlay has just left, or just enclosed. */
1626 int change_beg
, change_end
;
1628 o_beg
= OVERLAY_START (overlay
);
1629 o_end
= OVERLAY_END (overlay
);
1630 o_beg
= OVERLAY_POSITION (o_beg
);
1631 o_end
= OVERLAY_POSITION (o_end
);
1633 if (XINT (o_beg
) == XINT (beg
))
1634 redisplay_region (b
, XINT (o_end
), XINT (end
));
1635 else if (XINT (o_end
) == XINT (end
))
1636 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1639 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1640 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1641 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1645 if (!NILP (obuffer
))
1647 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1648 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1651 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1652 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1654 /* Put the overlay on the wrong list. */
1655 end
= OVERLAY_END (overlay
);
1656 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1657 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1659 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1661 /* This puts it in the right list, and in the right order. */
1662 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1664 return unbind_to (count
, overlay
);
1667 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1668 "Delete the overlay OVERLAY from its buffer.")
1670 Lisp_Object overlay
;
1674 int count
= specpdl_ptr
- specpdl
;
1676 CHECK_OVERLAY (overlay
, 0);
1678 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1682 b
= XBUFFER (buffer
);
1684 specbind (Qinhibit_quit
, Qt
);
1686 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1687 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1689 redisplay_region (b
,
1690 marker_position (OVERLAY_START (overlay
)),
1691 marker_position (OVERLAY_END (overlay
)));
1693 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1694 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1696 return unbind_to (count
, Qnil
);
1699 /* Overlay dissection functions. */
1701 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1702 "Return the position at which OVERLAY starts.")
1704 Lisp_Object overlay
;
1706 CHECK_OVERLAY (overlay
, 0);
1708 return (Fmarker_position (OVERLAY_START (overlay
)));
1711 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1712 "Return the position at which OVERLAY ends.")
1714 Lisp_Object overlay
;
1716 CHECK_OVERLAY (overlay
, 0);
1718 return (Fmarker_position (OVERLAY_END (overlay
)));
1721 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1722 "Return the buffer OVERLAY belongs to.")
1724 Lisp_Object overlay
;
1726 CHECK_OVERLAY (overlay
, 0);
1728 return Fmarker_buffer (OVERLAY_START (overlay
));
1731 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1732 "Return a list of the properties on OVERLAY.\n\
1733 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1736 Lisp_Object overlay
;
1738 CHECK_OVERLAY (overlay
, 0);
1740 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1744 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1745 "Return a list of the overlays that contain position POS.")
1751 Lisp_Object
*overlay_vec
;
1755 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1758 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1760 /* Put all the overlays we want in a vector in overlay_vec.
1761 Store the length in len. */
1762 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1764 /* Make a list of them all. */
1765 result
= Flist (noverlays
, overlay_vec
);
1767 xfree (overlay_vec
);
1771 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1773 "Return the next position after POS where an overlay starts or ends.")
1779 Lisp_Object
*overlay_vec
;
1784 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1787 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1789 /* Put all the overlays we want in a vector in overlay_vec.
1790 Store the length in len.
1791 endpos gets the position where the next overlay starts. */
1792 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1794 /* If any of these overlays ends before endpos,
1795 use its ending point instead. */
1796 for (i
= 0; i
< noverlays
; i
++)
1801 oend
= OVERLAY_END (overlay_vec
[i
]);
1802 oendpos
= OVERLAY_POSITION (oend
);
1803 if (oendpos
< endpos
)
1807 xfree (overlay_vec
);
1808 return make_number (endpos
);
1811 /* These functions are for debugging overlays. */
1813 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1814 "Return a pair of lists giving all the overlays of the current buffer.\n\
1815 The car has all the overlays before the overlay center;\n\
1816 the cdr has all the overlays before the overlay center.\n\
1817 Recentering overlays moves overlays between these lists.\n\
1818 The lists you get are copies, so that changing them has no effect.\n\
1819 However, the overlays you get are the real objects that the buffer uses.")
1822 Lisp_Object before
, after
;
1823 before
= current_buffer
->overlays_before
;
1825 before
= Fcopy_sequence (before
);
1826 after
= current_buffer
->overlays_after
;
1828 after
= Fcopy_sequence (after
);
1830 return Fcons (before
, after
);
1833 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1834 "Recenter the overlays of the current buffer around position POS.")
1838 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1840 recenter_overlay_lists (current_buffer
, XINT (pos
));
1844 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1845 "Get the property of overlay OVERLAY with property name NAME.")
1847 Lisp_Object overlay
, prop
;
1851 CHECK_OVERLAY (overlay
, 0);
1853 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1854 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1855 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1857 if (EQ (XCONS (plist
)->car
, prop
))
1858 return XCONS (XCONS (plist
)->cdr
)->car
;
1864 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1865 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1866 (overlay
, prop
, value
)
1867 Lisp_Object overlay
, prop
, value
;
1869 Lisp_Object plist
, tail
;
1871 CHECK_OVERLAY (overlay
, 0);
1873 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
1875 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1876 marker_position (OVERLAY_START (overlay
)),
1877 marker_position (OVERLAY_END (overlay
)));
1879 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1882 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1883 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1885 if (EQ (XCONS (tail
)->car
, prop
))
1886 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
1889 if (! CONSP (XCONS (overlay
)->cdr
))
1890 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
1892 XCONS (XCONS (overlay
)->cdr
)->cdr
1893 = Fcons (prop
, Fcons (value
, plist
));
1898 /* Run the modification-hooks of overlays that include
1899 any part of the text in START to END.
1900 Run the insert-before-hooks of overlay starting at END,
1901 and the insert-after-hooks of overlay ending at START. */
1904 verify_overlay_modification (start
, end
)
1905 Lisp_Object start
, end
;
1907 Lisp_Object prop
, overlay
, tail
;
1908 int insertion
= EQ (start
, end
);
1910 for (tail
= current_buffer
->overlays_before
;
1912 tail
= XCONS (tail
)->cdr
)
1914 int startpos
, endpos
;
1915 Lisp_Object ostart
, oend
;
1917 overlay
= XCONS (tail
)->car
;
1919 ostart
= OVERLAY_START (overlay
);
1920 oend
= OVERLAY_END (overlay
);
1921 endpos
= OVERLAY_POSITION (oend
);
1922 if (XFASTINT (start
) > endpos
)
1924 startpos
= OVERLAY_POSITION (ostart
);
1925 if (XFASTINT (end
) == startpos
&& insertion
)
1927 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
1928 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1930 if (XFASTINT (start
) == endpos
&& insertion
)
1932 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
1933 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1936 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
1937 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
1939 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
1940 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1944 for (tail
= current_buffer
->overlays_after
;
1946 tail
= XCONS (tail
)->cdr
)
1948 int startpos
, endpos
;
1949 Lisp_Object ostart
, oend
;
1951 overlay
= XCONS (tail
)->car
;
1953 ostart
= OVERLAY_START (overlay
);
1954 oend
= OVERLAY_END (overlay
);
1955 startpos
= OVERLAY_POSITION (ostart
);
1956 endpos
= OVERLAY_POSITION (oend
);
1957 if (XFASTINT (end
) < startpos
)
1959 if (XFASTINT (end
) == startpos
&& insertion
)
1961 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
1962 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1964 if (XFASTINT (start
) == endpos
&& insertion
)
1966 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
1967 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1970 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
1971 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
1973 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
1974 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1980 call_overlay_mod_hooks (list
, overlay
, start
, end
)
1981 Lisp_Object list
, overlay
, start
, end
;
1983 struct gcpro gcpro1
;
1985 while (!NILP (list
))
1987 call3 (Fcar (list
), overlay
, start
, end
);
1993 /* Somebody has tried to store NEWVAL into the buffer-local slot with
1994 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
1996 buffer_slot_type_mismatch (valcontents
, newval
)
1997 Lisp_Object valcontents
, newval
;
1999 unsigned int offset
= XUINT (valcontents
);
2000 unsigned char *symbol_name
=
2001 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2005 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2007 case Lisp_Int
: type_name
= "integers"; break;
2008 case Lisp_String
: type_name
= "strings"; break;
2009 case Lisp_Marker
: type_name
= "markers"; break;
2010 case Lisp_Symbol
: type_name
= "symbols"; break;
2011 case Lisp_Cons
: type_name
= "lists"; break;
2012 case Lisp_Vector
: type_name
= "vectors"; break;
2017 error ("only %s should be stored in the buffer-local variable %s",
2018 type_name
, symbol_name
);
2023 register Lisp_Object tem
;
2025 /* Make sure all markable slots in buffer_defaults
2026 are initialized reasonably, so mark_buffer won't choke. */
2027 reset_buffer (&buffer_defaults
);
2028 reset_buffer (&buffer_local_symbols
);
2029 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2030 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2032 /* Set up the default values of various buffer slots. */
2033 /* Must do these before making the first buffer! */
2035 /* real setup is done in loaddefs.el */
2036 buffer_defaults
.mode_line_format
= build_string ("%-");
2037 buffer_defaults
.abbrev_mode
= Qnil
;
2038 buffer_defaults
.overwrite_mode
= Qnil
;
2039 buffer_defaults
.case_fold_search
= Qt
;
2040 buffer_defaults
.auto_fill_function
= Qnil
;
2041 buffer_defaults
.selective_display
= Qnil
;
2043 buffer_defaults
.selective_display_ellipses
= Qt
;
2045 buffer_defaults
.abbrev_table
= Qnil
;
2046 buffer_defaults
.display_table
= Qnil
;
2047 buffer_defaults
.undo_list
= Qnil
;
2048 buffer_defaults
.mark_active
= Qnil
;
2049 buffer_defaults
.overlays_before
= Qnil
;
2050 buffer_defaults
.overlays_after
= Qnil
;
2051 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2053 XFASTINT (buffer_defaults
.tab_width
) = 8;
2054 buffer_defaults
.truncate_lines
= Qnil
;
2055 buffer_defaults
.ctl_arrow
= Qt
;
2057 XFASTINT (buffer_defaults
.fill_column
) = 70;
2058 XFASTINT (buffer_defaults
.left_margin
) = 0;
2060 /* Assign the local-flags to the slots that have default values.
2061 The local flag is a bit that is used in the buffer
2062 to say that it has its own local value for the slot.
2063 The local flag bits are in the local_var_flags slot of the buffer. */
2065 /* Nothing can work if this isn't true */
2066 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2068 /* 0 means not a lisp var, -1 means always local, else mask */
2069 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2070 XFASTINT (buffer_local_flags
.filename
) = -1;
2071 XFASTINT (buffer_local_flags
.directory
) = -1;
2072 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2073 XFASTINT (buffer_local_flags
.save_length
) = -1;
2074 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2075 XFASTINT (buffer_local_flags
.read_only
) = -1;
2076 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2077 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2078 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2079 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2081 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2082 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2083 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2084 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2085 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2086 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2088 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2090 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2091 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2092 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2093 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2094 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2095 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2096 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2097 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2099 Vbuffer_alist
= Qnil
;
2103 QSFundamental
= build_string ("Fundamental");
2105 Qfundamental_mode
= intern ("fundamental-mode");
2106 buffer_defaults
.major_mode
= Qfundamental_mode
;
2108 Qmode_class
= intern ("mode-class");
2110 Qprotected_field
= intern ("protected-field");
2112 Qpermanent_local
= intern ("permanent-local");
2114 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2116 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2117 /* super-magic invisible buffer */
2118 Vbuffer_alist
= Qnil
;
2120 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2125 char buf
[MAXPATHLEN
+1];
2127 struct stat dotstat
, pwdstat
;
2130 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2132 /* If PWD is accurate, use it instead of calling getwd. This is faster
2133 when PWD is right, and may avoid a fatal error. */
2134 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2135 && stat (pwd
, &pwdstat
) == 0
2136 && stat (".", &dotstat
) == 0
2137 && dotstat
.st_ino
== pwdstat
.st_ino
2138 && dotstat
.st_dev
== pwdstat
.st_dev
2139 && strlen (pwd
) < MAXPATHLEN
)
2141 else if (getwd (buf
) == 0)
2142 fatal ("`getwd' failed: %s.\n", buf
);
2145 /* Maybe this should really use some standard subroutine
2146 whose definition is filename syntax dependent. */
2147 if (buf
[strlen (buf
) - 1] != '/')
2149 #endif /* not VMS */
2150 current_buffer
->directory
= build_string (buf
);
2152 temp
= get_minibuffer (0);
2153 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2156 /* initialize the buffer routines */
2159 extern Lisp_Object Qdisabled
;
2161 staticpro (&Vbuffer_defaults
);
2162 staticpro (&Vbuffer_local_symbols
);
2163 staticpro (&Qfundamental_mode
);
2164 staticpro (&Qmode_class
);
2165 staticpro (&QSFundamental
);
2166 staticpro (&Vbuffer_alist
);
2167 staticpro (&Qprotected_field
);
2168 staticpro (&Qpermanent_local
);
2169 staticpro (&Qkill_buffer_hook
);
2170 staticpro (&Qoverlayp
);
2171 staticpro (&Qmodification_hooks
);
2172 Qmodification_hooks
= intern ("modification-hooks");
2173 staticpro (&Qinsert_in_front_hooks
);
2174 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2175 staticpro (&Qinsert_behind_hooks
);
2176 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2178 Qoverlayp
= intern ("overlayp");
2180 Fput (Qprotected_field
, Qerror_conditions
,
2181 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2182 Fput (Qprotected_field
, Qerror_message
,
2183 build_string ("Attempt to modify a protected field"));
2185 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
2187 /* All these use DEFVAR_LISP_NOPRO because the slots in
2188 buffer_defaults will all be marked via Vbuffer_defaults. */
2190 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2191 &buffer_defaults
.mode_line_format
,
2192 "Default value of `mode-line-format' for buffers that don't override it.\n\
2193 This is the same as (default-value 'mode-line-format).");
2195 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2196 &buffer_defaults
.abbrev_mode
,
2197 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2198 This is the same as (default-value 'abbrev-mode).");
2200 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2201 &buffer_defaults
.ctl_arrow
,
2202 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2203 This is the same as (default-value 'ctl-arrow).");
2205 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2206 &buffer_defaults
.truncate_lines
,
2207 "Default value of `truncate-lines' for buffers that do not override it.\n\
2208 This is the same as (default-value 'truncate-lines).");
2210 DEFVAR_LISP_NOPRO ("default-fill-column",
2211 &buffer_defaults
.fill_column
,
2212 "Default value of `fill-column' for buffers that do not override it.\n\
2213 This is the same as (default-value 'fill-column).");
2215 DEFVAR_LISP_NOPRO ("default-left-margin",
2216 &buffer_defaults
.left_margin
,
2217 "Default value of `left-margin' for buffers that do not override it.\n\
2218 This is the same as (default-value 'left-margin).");
2220 DEFVAR_LISP_NOPRO ("default-tab-width",
2221 &buffer_defaults
.tab_width
,
2222 "Default value of `tab-width' for buffers that do not override it.\n\
2223 This is the same as (default-value 'tab-width).");
2225 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2226 &buffer_defaults
.case_fold_search
,
2227 "Default value of `case-fold-search' for buffers that don't override it.\n\
2228 This is the same as (default-value 'case-fold-search).");
2230 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2233 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2234 But make-docfile finds it!
2235 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2237 "Template for displaying mode line for current buffer.\n\
2238 Each buffer has its own value of this variable.\n\
2239 Value may be a string, a symbol or a list or cons cell.\n\
2240 For a symbol, its value is used (but it is ignored if t or nil).\n\
2241 A string appearing directly as the value of a symbol is processed verbatim\n\
2242 in that the %-constructs below are not recognized.\n\
2243 For a list whose car is a symbol, the symbol's value is taken,\n\
2244 and if that is non-nil, the cadr of the list is processed recursively.\n\
2245 Otherwise, the caddr of the list (if there is one) is processed.\n\
2246 For a list whose car is a string or list, each element is processed\n\
2247 recursively and the results are effectively concatenated.\n\
2248 For a list whose car is an integer, the cdr of the list is processed\n\
2249 and padded (if the number is positive) or truncated (if negative)\n\
2250 to the width specified by that number.\n\
2251 A string is printed verbatim in the mode line except for %-constructs:\n\
2252 (%-constructs are allowed when the string is the entire mode-line-format\n\
2253 or when it is found in a cons-cell or a list)\n\
2254 %b -- print buffer name. %f -- print visited file name.\n\
2255 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2256 %s -- print process status. %l -- print the current line number.\n\
2257 %p -- print percent of buffer above top of window, or top, bot or all.\n\
2258 %n -- print Narrow if appropriate.\n\
2259 %[ -- print one [ for each recursive editing level. %] similar.\n\
2260 %% -- print %. %- -- print infinitely many dashes.\n\
2261 Decimal digits after the % specify field width to which to pad.");
2264 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2265 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2266 nil here means use current buffer's major mode.");
2268 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2269 make_number (Lisp_Symbol
),
2270 "Symbol for current buffer's major mode.");
2272 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2273 make_number (Lisp_String
),
2274 "Pretty name of current buffer's major mode (a string).");
2276 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2277 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2278 Automatically becomes buffer-local when set in any fashion.");
2280 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2282 "*Non-nil if searches should ignore case.\n\
2283 Automatically becomes buffer-local when set in any fashion.");
2285 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2286 make_number (Lisp_Int
),
2287 "*Column beyond which automatic line-wrapping should happen.\n\
2288 Automatically becomes buffer-local when set in any fashion.");
2290 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2291 make_number (Lisp_Int
),
2292 "*Column for the default indent-line-function to indent to.\n\
2293 Linefeed indents to this column in Fundamental mode.\n\
2294 Automatically becomes buffer-local when set in any fashion.");
2296 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2297 make_number (Lisp_Int
),
2298 "*Distance between tab stops (for display of tab characters), in columns.\n\
2299 Automatically becomes buffer-local when set in any fashion.");
2301 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2302 "*Non-nil means display control chars with uparrow.\n\
2303 Nil means use backslash and octal digits.\n\
2304 Automatically becomes buffer-local when set in any fashion.\n\
2305 This variable does not apply to characters whose display is specified\n\
2306 in the current display table (if there is one).");
2308 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2309 "*Non-nil means do not display continuation lines;\n\
2310 give each line of text one screen line.\n\
2311 Automatically becomes buffer-local when set in any fashion.\n\
2313 Note that this is overridden by the variable\n\
2314 `truncate-partial-width-windows' if that variable is non-nil\n\
2315 and this buffer is not full-frame width.");
2317 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2318 make_number (Lisp_String
),
2319 "Name of default directory of current buffer. Should end with slash.\n\
2320 Each buffer has its own value of this variable.");
2322 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2324 "Function called (if non-nil) to perform auto-fill.\n\
2325 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2326 Each buffer has its own value of this variable.\n\
2327 NOTE: This variable is not an ordinary hook;\n\
2328 It may not be a list of functions.");
2330 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2331 make_number (Lisp_String
),
2332 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2333 Each buffer has its own value of this variable.");
2335 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2336 ¤t_buffer
->auto_save_file_name
,
2337 make_number (Lisp_String
),
2338 "Name of file for auto-saving current buffer,\n\
2339 or nil if buffer should not be auto-saved.\n\
2340 Each buffer has its own value of this variable.");
2342 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2343 "Non-nil if this buffer is read-only.\n\
2344 Each buffer has its own value of this variable.");
2346 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2347 "Non-nil if this buffer's file has been backed up.\n\
2348 Backing up is done before the first time the file is saved.\n\
2349 Each buffer has its own value of this variable.");
2351 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2352 make_number (Lisp_Int
),
2353 "Length of current buffer when last read in, saved or auto-saved.\n\
2355 Each buffer has its own value of this variable.");
2357 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2359 "Non-nil enables selective display:\n\
2360 Integer N as value means display only lines\n\
2361 that start with less than n columns of space.\n\
2362 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2363 Then ^M's in the file are written into files as newlines.\n\n\
2364 Automatically becomes buffer-local when set in any fashion.");
2367 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2368 ¤t_buffer
->selective_display_ellipses
,
2370 "t means display ... on previous line when a line is invisible.\n\
2371 Automatically becomes buffer-local when set in any fashion.");
2374 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2375 "Non-nil if self-insertion should replace existing text.\n\
2376 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2377 inserts at the end of a line, and inserts when point is before a tab,\n\
2378 until the tab is filled in.\n\
2379 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2380 Automatically becomes buffer-local when set in any fashion.");
2382 #if 0 /* The doc string is too long for some compilers,
2383 but make-docfile can find it in this comment. */
2384 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2386 "Display table that controls display of the contents of current buffer.\n\
2387 Automatically becomes buffer-local when set in any fashion.\n\
2388 The display table is a vector created with `make-display-table'.\n\
2389 The first 256 elements control how to display each possible text character.\n\
2390 Each value should be a vector of characters or nil;\n\
2391 nil means display the character in the default fashion.\n\
2392 The remaining five elements control the display of\n\
2393 the end of a truncated screen line (element 256, a single character);\n\
2394 the end of a continued line (element 257, a single character);\n\
2395 the escape character used to display character codes in octal\n\
2396 (element 258, a single character);\n\
2397 the character used as an arrow for control characters (element 259,\n\
2398 a single character);\n\
2399 the decoration indicating the presence of invisible lines (element 260,\n\
2400 a vector of characters).\n\
2401 If this variable is nil, the value of `standard-display-table' is used.\n\
2402 Each window can have its own, overriding display table.");
2404 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2407 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2410 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2411 "Function to call before each text change.\n\
2412 Two arguments are passed to the function: the positions of\n\
2413 the beginning and end of the range of old text to be changed.\n\
2414 \(For an insertion, the beginning and end are at the same place.)\n\
2415 No information is given about the length of the text after the change.\n\
2416 position of the change\n\
2418 While executing the `before-change-function', changes to buffers do not\n\
2419 cause calls to any `before-change-function' or `after-change-function'.");
2420 Vbefore_change_function
= Qnil
;
2422 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2423 "Function to call after each text change.\n\
2424 Three arguments are passed to the function: the positions of\n\
2425 the beginning and end of the range of changed text,\n\
2426 and the length of the pre-change text replaced by that range.\n\
2427 \(For an insertion, the pre-change length is zero;\n\
2428 for a deletion, that length is the number of characters deleted,\n\
2429 and the post-change beginning and end are at the same place.)\n\
2431 While executing the `after-change-function', changes to buffers do not\n\
2432 cause calls to any `before-change-function' or `after-change-function'.");
2433 Vafter_change_function
= Qnil
;
2435 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2436 "A list of functions to call before changing a buffer which is unmodified.\n\
2437 The functions are run using the `run-hooks' function.");
2438 Vfirst_change_hook
= Qnil
;
2439 Qfirst_change_hook
= intern ("first-change-hook");
2440 staticpro (&Qfirst_change_hook
);
2442 #if 0 /* The doc string is too long for some compilers,
2443 but make-docfile can find it in this comment. */
2444 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2445 "List of undo entries in current buffer.\n\
2446 Recent changes come first; older changes follow newer.\n\
2448 An entry (START . END) represents an insertion which begins at\n\
2449 position START and ends at position END.\n\
2451 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2452 from (abs POSITION). If POSITION is positive, point was at the front\n\
2453 of the text being deleted; if negative, point was at the end.\n\
2455 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2456 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2457 16-bit words of the buffer's modification count at the time. If the\n\
2458 modification count of the most recent save is different, this entry is\n\
2461 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2462 was modified between BEG and END. PROP is the property name,\n\
2463 and VAL is the old value.\n\
2465 An entry of the form POSITION indicates that point was at the buffer\n\
2466 location given by the integer. Undoing an entry of this form places\n\
2467 point at POSITION.\n\
2469 nil marks undo boundaries. The undo command treats the changes\n\
2470 between two undo boundaries as a single step to be undone.\n\
2472 If the value of the variable is t, undo information is not recorded.");
2474 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2477 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2478 "Non-nil means the mark and region are currently active in this buffer.\n\
2479 Automatically local in all buffers.");
2481 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2482 "*Non-nil means deactivate the mark when the buffer contents change.");
2483 Vtransient_mark_mode
= Qnil
;
2485 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2486 "*Non-nil means disregard read-only status of buffers or characters.\n\
2487 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2488 text properties. If the value is a list, disregard `buffer-read-only'\n\
2489 and disregard a `read-only' text property if the property value\n\
2490 is a member of the list.");
2491 Vinhibit_read_only
= Qnil
;
2493 defsubr (&Sbuffer_list
);
2494 defsubr (&Sget_buffer
);
2495 defsubr (&Sget_file_buffer
);
2496 defsubr (&Sget_buffer_create
);
2497 defsubr (&Sgenerate_new_buffer_name
);
2498 defsubr (&Sbuffer_name
);
2499 /*defsubr (&Sbuffer_number);*/
2500 defsubr (&Sbuffer_file_name
);
2501 defsubr (&Sbuffer_local_variables
);
2502 defsubr (&Sbuffer_modified_p
);
2503 defsubr (&Sset_buffer_modified_p
);
2504 defsubr (&Sbuffer_modified_tick
);
2505 defsubr (&Srename_buffer
);
2506 defsubr (&Sother_buffer
);
2507 defsubr (&Sbuffer_disable_undo
);
2508 defsubr (&Sbuffer_enable_undo
);
2509 defsubr (&Skill_buffer
);
2510 defsubr (&Serase_buffer
);
2511 defsubr (&Sswitch_to_buffer
);
2512 defsubr (&Spop_to_buffer
);
2513 defsubr (&Scurrent_buffer
);
2514 defsubr (&Sset_buffer
);
2515 defsubr (&Sbarf_if_buffer_read_only
);
2516 defsubr (&Sbury_buffer
);
2517 defsubr (&Slist_buffers
);
2518 defsubr (&Skill_all_local_variables
);
2520 defsubr (&Soverlayp
);
2521 defsubr (&Smake_overlay
);
2522 defsubr (&Sdelete_overlay
);
2523 defsubr (&Smove_overlay
);
2524 defsubr (&Soverlay_start
);
2525 defsubr (&Soverlay_end
);
2526 defsubr (&Soverlay_buffer
);
2527 defsubr (&Soverlay_properties
);
2528 defsubr (&Soverlays_at
);
2529 defsubr (&Snext_overlay_change
);
2530 defsubr (&Soverlay_recenter
);
2531 defsubr (&Soverlay_lists
);
2532 defsubr (&Soverlay_get
);
2533 defsubr (&Soverlay_put
);
2538 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2539 initial_define_key (control_x_map
, 'k', "kill-buffer");
2540 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");