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"
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
;
113 Lisp_Object Vtransient_mark_mode
;
115 /* t means ignore all read-only text properties.
116 A list means ignore such a property if its value is a member of the list.
117 Any non-nil value means ignore buffer-read-only. */
118 Lisp_Object Vinhibit_read_only
;
120 /* List of functions to call before changing an unmodified buffer. */
121 Lisp_Object Vfirst_change_hook
;
122 Lisp_Object Qfirst_change_hook
;
124 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
126 Lisp_Object Qprotected_field
;
128 Lisp_Object QSFundamental
; /* A string "Fundamental" */
130 Lisp_Object Qkill_buffer_hook
;
132 Lisp_Object Qget_file_buffer
;
134 Lisp_Object Qoverlayp
;
136 Lisp_Object Qmodification_hooks
;
137 Lisp_Object Qinsert_in_front_hooks
;
138 Lisp_Object Qinsert_behind_hooks
;
140 /* For debugging; temporary. See set_buffer_internal. */
141 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
144 Lisp_Object Qbuffer_file_type
;
150 if (XTYPE (spec
) == Lisp_String
)
151 error ("No buffer named %s", XSTRING (spec
)->data
);
152 error ("Invalid buffer argument");
155 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
156 "Return a list of all existing live buffers.")
159 return Fmapcar (Qcdr
, Vbuffer_alist
);
162 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
163 "Return the buffer named NAME (a string).\n\
164 If there is no live buffer named NAME, return nil.\n\
165 NAME may also be a buffer; if so, the value is that buffer.")
167 register Lisp_Object name
;
169 if (XTYPE (name
) == Lisp_Buffer
)
171 CHECK_STRING (name
, 0);
173 return Fcdr (Fassoc (name
, Vbuffer_alist
));
176 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
177 "Return the buffer visiting file FILENAME (a string).\n\
178 If there is no such live buffer, return nil.")
180 register Lisp_Object filename
;
182 register Lisp_Object tail
, buf
, tem
;
185 CHECK_STRING (filename
, 0);
186 filename
= Fexpand_file_name (filename
, Qnil
);
188 /* If the file name has special constructs in it,
189 call the corresponding file handler. */
190 handler
= Ffind_file_name_handler (filename
);
192 return call2 (handler
, Qget_file_buffer
, filename
);
194 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
196 buf
= Fcdr (XCONS (tail
)->car
);
197 if (XTYPE (buf
) != Lisp_Buffer
) continue;
198 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
199 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
206 /* Incremented for each buffer created, to assign the buffer number. */
209 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
210 "Return the buffer named NAME, or create such a buffer and return it.\n\
211 A new buffer is created if there is no live buffer named NAME.\n\
212 If NAME starts with a space, the new buffer does not keep undo information.\n\
213 If NAME is a buffer instead of a string, then it is the value returned.\n\
214 The value is never nil.")
216 register Lisp_Object name
;
218 register Lisp_Object buf
, function
, tem
;
219 int count
= specpdl_ptr
- specpdl
;
220 register struct buffer
*b
;
222 buf
= Fget_buffer (name
);
226 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
228 BUF_GAP_SIZE (b
) = 20;
230 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
232 if (! BUF_BEG_ADDR (b
))
242 /* Put this on the chain of all buffers including killed ones. */
243 b
->next
= all_buffers
;
246 b
->mark
= Fmake_marker ();
247 /*b->number = make_number (++buffer_count);*/
249 if (XSTRING (name
)->data
[0] != ' ')
256 /* Put this in the alist of all live buffers. */
257 XSET (buf
, Lisp_Buffer
, b
);
258 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
260 b
->mark
= Fmake_marker ();
264 function
= buffer_defaults
.major_mode
;
267 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
269 function
= current_buffer
->major_mode
;
272 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
275 /* To select a nonfundamental mode,
276 select the buffer temporarily and then call the mode function. */
278 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
283 return unbind_to (count
, buf
);
286 /* Reinitialize everything about a buffer except its name and contents. */
290 register struct buffer
*b
;
293 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
295 b
->save_modified
= 1;
296 XFASTINT (b
->save_length
) = 0;
297 b
->last_window_start
= 1;
299 b
->auto_save_modified
= 0;
300 b
->auto_save_file_name
= Qnil
;
302 b
->overlays_before
= Qnil
;
303 b
->overlays_after
= Qnil
;
304 XFASTINT (b
->overlay_center
) = 1;
305 b
->mark_active
= Qnil
;
307 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
308 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
310 reset_buffer_local_variables(b
);
313 reset_buffer_local_variables (b
)
314 register struct buffer
*b
;
318 /* Reset the major mode to Fundamental, together with all the
319 things that depend on the major mode.
320 default-major-mode is handled at a higher level.
321 We ignore it here. */
322 b
->major_mode
= Qfundamental_mode
;
324 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
325 b
->mode_name
= QSFundamental
;
326 b
->minor_modes
= Qnil
;
327 b
->downcase_table
= Vascii_downcase_table
;
328 b
->upcase_table
= Vascii_upcase_table
;
329 b
->case_canon_table
= Vascii_downcase_table
;
330 b
->case_eqv_table
= Vascii_upcase_table
;
332 b
->sort_table
= XSTRING (Vascii_sort_table
);
333 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
336 /* Reset all per-buffer variables to their defaults. */
337 b
->local_var_alist
= Qnil
;
338 b
->local_var_flags
= 0;
340 /* For each slot that has a default value,
341 copy that into the slot. */
343 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
344 offset
< sizeof (struct buffer
);
345 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
346 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
347 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
348 *(Lisp_Object
*)(offset
+ (char *)b
) =
349 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
352 /* We split this away from generate-new-buffer, because rename-buffer
353 and set-visited-file-name ought to be able to use this to really
354 rename the buffer properly. */
356 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
358 "Return a string that is the name of no existing buffer based on NAME.\n\
359 If there is no live buffer named NAME, then return NAME.\n\
360 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
361 until an unused name is found, and then return that name.\n\
362 Optional second argument IGNORE specifies a name that is okay to use\n\
363 \(if it is in the sequence to be tried)\n\
364 even if a buffer with that name exists.")
366 register Lisp_Object name
, ignore
;
368 register Lisp_Object gentemp
, tem
;
372 CHECK_STRING (name
, 0);
374 tem
= Fget_buffer (name
);
381 sprintf (number
, "<%d>", ++count
);
382 gentemp
= concat2 (name
, build_string (number
));
383 tem
= Fstring_equal (gentemp
, ignore
);
386 tem
= Fget_buffer (gentemp
);
393 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
394 "Return the name of BUFFER, as a string.\n\
395 With no argument or nil as argument, return the name of the current buffer.")
397 register Lisp_Object buffer
;
400 return current_buffer
->name
;
401 CHECK_BUFFER (buffer
, 0);
402 return XBUFFER (buffer
)->name
;
405 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
406 "Return name of file BUFFER is visiting, or nil if none.\n\
407 No argument or nil as argument means use the current buffer.")
409 register Lisp_Object buffer
;
412 return current_buffer
->filename
;
413 CHECK_BUFFER (buffer
, 0);
414 return XBUFFER (buffer
)->filename
;
417 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
418 Sbuffer_local_variables
, 0, 1, 0,
419 "Return an alist of variables that are buffer-local in BUFFER.\n\
420 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
421 For a symbol that is locally unbound, just the symbol appears in the value.\n\
422 Note that storing new VALUEs in these elements doesn't change the variables.\n\
423 No argument or nil as argument means use current buffer as BUFFER.")
425 register Lisp_Object buffer
;
427 register struct buffer
*buf
;
428 register Lisp_Object result
;
431 buf
= current_buffer
;
434 CHECK_BUFFER (buffer
, 0);
435 buf
= XBUFFER (buffer
);
441 /* Reference each variable in the alist in our current buffer.
442 If inquiring about the current buffer, this gets the current values,
443 so store them into the alist so the alist is up to date.
444 If inquiring about some other buffer, this swaps out any values
445 for that buffer, making the alist up to date automatically. */
446 register Lisp_Object tail
;
447 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
449 Lisp_Object val
, elt
;
451 elt
= XCONS (tail
)->car
;
453 if (buf
== current_buffer
)
454 val
= find_symbol_value (XCONS (elt
)->car
);
456 val
= XCONS (elt
)->cdr
;
458 /* If symbol is unbound, put just the symbol in the list. */
459 if (EQ (val
, Qunbound
))
460 result
= Fcons (XCONS (elt
)->car
, result
);
461 /* Otherwise, put (symbol . value) in the list. */
463 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
467 /* Add on all the variables stored in special slots. */
469 register int offset
, mask
;
471 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
472 offset
< sizeof (struct buffer
);
473 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
475 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
476 if (mask
== -1 || (buf
->local_var_flags
& mask
))
477 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
479 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
480 *(Lisp_Object
*)(offset
+ (char *)buf
)),
489 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
491 "Return t if BUFFER was modified since its file was last read or saved.\n\
492 No argument or nil as argument means use current buffer as BUFFER.")
494 register Lisp_Object buffer
;
496 register struct buffer
*buf
;
498 buf
= current_buffer
;
501 CHECK_BUFFER (buffer
, 0);
502 buf
= XBUFFER (buffer
);
505 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
508 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
510 "Mark current buffer as modified or unmodified according to FLAG.\n\
511 A non-nil FLAG means mark the buffer modified.")
513 register Lisp_Object flag
;
515 register int already
;
516 register Lisp_Object fn
;
518 #ifdef CLASH_DETECTION
519 /* If buffer becoming modified, lock the file.
520 If buffer becoming unmodified, unlock the file. */
522 fn
= current_buffer
->filename
;
525 already
= current_buffer
->save_modified
< MODIFF
;
526 if (!already
&& !NILP (flag
))
528 else if (already
&& NILP (flag
))
531 #endif /* CLASH_DETECTION */
533 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
538 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
540 "Return BUFFER's tick counter, incremented for each change in text.\n\
541 Each buffer has a tick counter which is incremented each time the text in\n\
542 that buffer is changed. It wraps around occasionally.\n\
543 No argument or nil as argument means use current buffer as BUFFER.")
545 register Lisp_Object buffer
;
547 register struct buffer
*buf
;
549 buf
= current_buffer
;
552 CHECK_BUFFER (buffer
, 0);
553 buf
= XBUFFER (buffer
);
556 return make_number (BUF_MODIFF (buf
));
559 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
560 "sRename buffer (to new name): \nP",
561 "Change current buffer's name to NEWNAME (a string).\n\
562 If second arg UNIQUE is nil or omitted, it is an error if a\n\
563 buffer named NEWNAME already exists.\n\
564 If UNIQUE is non-nil, come up with a new name using\n\
565 `generate-new-buffer-name'.\n\
566 Interactively, you can set UNIQUE with a prefix argument.\n\
567 We return the name we actually gave the buffer.\n\
568 This does not change the name of the visited file (if any).")
570 register Lisp_Object name
, unique
;
572 register Lisp_Object tem
, buf
;
574 CHECK_STRING (name
, 0);
575 tem
= Fget_buffer (name
);
576 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
577 the buffer automatically so you can create another with the original name.
578 It makes UNIQUE equivalent to
579 (rename-buffer (generate-new-buffer-name NAME)). */
580 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
581 return current_buffer
->name
;
585 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
587 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
590 current_buffer
->name
= name
;
592 /* Catch redisplay's attention. Unless we do this, the mode lines for
593 any windows displaying current_buffer will stay unchanged. */
596 XSET (buf
, Lisp_Buffer
, current_buffer
);
597 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
598 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
599 call0 (intern ("rename-auto-save-file"));
603 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
604 "Return most recently selected buffer other than BUFFER.\n\
605 Buffers not visible in windows are preferred to visible buffers,\n\
606 unless optional second argument VISIBLE-OK is non-nil.\n\
607 If no other buffer exists, the buffer `*scratch*' is returned.\n\
608 If BUFFER is omitted or nil, some interesting buffer is returned.")
610 register Lisp_Object buffer
, visible_ok
;
612 register Lisp_Object tail
, buf
, notsogood
, tem
;
615 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
617 buf
= Fcdr (Fcar (tail
));
618 if (EQ (buf
, buffer
))
620 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
622 if (NILP (visible_ok
))
623 tem
= Fget_buffer_window (buf
, Qt
);
628 if (NILP (notsogood
))
631 if (!NILP (notsogood
))
633 return Fget_buffer_create (build_string ("*scratch*"));
636 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 0, 1,
638 "Make BUFFER stop keeping undo information.\n\
639 No argument or nil as argument means do this for the current buffer.")
641 register Lisp_Object buffer
;
643 Lisp_Object real_buffer
;
646 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
649 real_buffer
= Fget_buffer (buffer
);
650 if (NILP (real_buffer
))
654 XBUFFER (real_buffer
)->undo_list
= Qt
;
659 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
661 "Start keeping undo information for buffer BUFFER.\n\
662 No argument or nil as argument means do this for the current buffer.")
664 register Lisp_Object buffer
;
666 Lisp_Object real_buffer
;
669 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
672 real_buffer
= Fget_buffer (buffer
);
673 if (NILP (real_buffer
))
677 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
678 XBUFFER (real_buffer
)->undo_list
= Qnil
;
684 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
685 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
686 The buffer being killed will be current while the hook is running.\n\
689 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
690 "Kill the buffer BUFFER.\n\
691 The argument may be a buffer or may be the name of a buffer.\n\
692 An argument of nil means kill the current buffer.\n\n\
693 Value is t if the buffer is actually killed, nil if user says no.\n\n\
694 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
695 if not void, is a list of functions to be called, with no arguments,\n\
696 before the buffer is actually killed. The buffer to be killed is current\n\
697 when the hook functions are called.\n\n\
698 Any processes that have this buffer as the `process-buffer' are killed\n\
699 with `delete-process'.")
704 register struct buffer
*b
;
705 register Lisp_Object tem
;
706 register struct Lisp_Marker
*m
;
707 struct gcpro gcpro1
, gcpro2
;
710 buf
= Fcurrent_buffer ();
712 buf
= Fget_buffer (bufname
);
718 /* Query if the buffer is still modified. */
719 if (INTERACTIVE
&& !NILP (b
->filename
)
720 && BUF_MODIFF (b
) > b
->save_modified
)
722 GCPRO2 (buf
, bufname
);
723 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
724 XSTRING (b
->name
)->data
));
730 /* Run kill-buffer hook with the buffer to be killed the current buffer. */
732 register Lisp_Object val
;
733 int count
= specpdl_ptr
- specpdl
;
735 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
736 set_buffer_internal (b
);
737 call1 (Vrun_hooks
, Qkill_buffer_hook
);
738 unbind_to (count
, Qnil
);
741 /* We have no more questions to ask. Verify that it is valid
742 to kill the buffer. This must be done after the questions
743 since anything can happen within do_yes_or_no_p. */
745 /* Don't kill the minibuffer now current. */
746 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
752 /* Make this buffer not be current.
753 In the process, notice if this is the sole visible buffer
754 and give up if so. */
755 if (b
== current_buffer
)
757 tem
= Fother_buffer (buf
, Qnil
);
759 if (b
== current_buffer
)
763 /* Now there is no question: we can kill the buffer. */
765 #ifdef CLASH_DETECTION
766 /* Unlock this buffer's file, if it is locked. */
768 #endif /* CLASH_DETECTION */
770 kill_buffer_processes (buf
);
774 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
775 Freplace_buffer_in_windows (buf
);
778 /* Delete any auto-save file. */
779 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
782 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
784 unlink (XSTRING (b
->auto_save_file_name
)->data
);
787 /* Unchain all markers of this buffer
788 and leave them pointing nowhere. */
789 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
798 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
799 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
800 /* Perhaps we should explicitly free the interval tree here... */
804 BUFFER_FREE (BUF_BEG_ADDR (b
));
811 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
812 we do this each time BUF is selected visibly, the more recently
813 selected buffers are always closer to the front of the list. This
814 means that other_buffer is more likely to choose a relevant buffer. */
819 register Lisp_Object link
, prev
;
822 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
824 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
829 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
830 we cannot use Fdelq itself here because it allows quitting. */
833 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
835 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
837 XCONS(link
)->cdr
= Vbuffer_alist
;
838 Vbuffer_alist
= link
;
841 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
842 "Select buffer BUFFER in the current window.\n\
843 BUFFER may be a buffer or a buffer name.\n\
844 Optional second arg NORECORD non-nil means\n\
845 do not put this buffer at the front of the list of recently selected ones.\n\
847 WARNING: This is NOT the way to work on another buffer temporarily\n\
848 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
849 the window-buffer correspondences.")
851 Lisp_Object bufname
, norecord
;
853 register Lisp_Object buf
;
856 if (EQ (minibuf_window
, selected_window
))
857 error ("Cannot switch buffers in minibuffer window");
858 tem
= Fwindow_dedicated_p (selected_window
);
860 error ("Cannot switch buffers in a dedicated window");
863 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
865 buf
= Fget_buffer_create (bufname
);
870 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
871 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
878 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
879 "Select buffer BUFFER in some window, preferably a different one.\n\
880 If BUFFER is nil, then some other buffer is chosen.\n\
881 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
882 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
883 window even if BUFFER is already visible in the selected window.")
885 Lisp_Object bufname
, other
;
887 register Lisp_Object buf
;
889 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
891 buf
= Fget_buffer_create (bufname
);
894 Fselect_window (Fdisplay_buffer (buf
, other
));
898 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
899 "Return the current buffer as a Lisp object.")
902 register Lisp_Object buf
;
903 XSET (buf
, Lisp_Buffer
, current_buffer
);
907 /* Set the current buffer to b */
910 set_buffer_internal (b
)
911 register struct buffer
*b
;
913 register struct buffer
*old_buf
;
914 register Lisp_Object tail
, valcontents
;
917 if (current_buffer
== b
)
920 windows_or_buffers_changed
= 1;
921 old_buf
= current_buffer
;
923 last_known_column_point
= -1; /* invalidate indentation cache */
925 /* Look down buffer's list of local Lisp variables
926 to find and update any that forward into C variables. */
928 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
930 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
931 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
932 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
933 && (tem
= XTYPE (XCONS (valcontents
)->car
),
934 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
935 || tem
== Lisp_Objfwd
)))
936 /* Just reference the variable
937 to cause it to become set for this buffer. */
938 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
941 /* Do the same with any others that were local to the previous buffer */
944 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
946 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
947 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
948 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
949 && (tem
= XTYPE (XCONS (valcontents
)->car
),
950 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
951 || tem
== Lisp_Objfwd
)))
952 /* Just reference the variable
953 to cause it to become set for this buffer. */
954 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
958 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
959 "Make the buffer BUFFER current for editing operations.\n\
960 BUFFER may be a buffer or the name of an existing buffer.\n\
961 See also `save-excursion' when you want to make a buffer current temporarily.\n\
962 This function does not display the buffer, so its effect ends\n\
963 when the current command terminates.\n\
964 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
966 register Lisp_Object bufname
;
968 register Lisp_Object buffer
;
969 buffer
= Fget_buffer (bufname
);
972 if (NILP (XBUFFER (buffer
)->name
))
973 error ("Selecting deleted buffer");
974 set_buffer_internal (XBUFFER (buffer
));
978 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
979 Sbarf_if_buffer_read_only
, 0, 0, 0,
980 "Signal a `buffer-read-only' error if the current buffer is read-only.")
983 if (!NILP (current_buffer
->read_only
)
984 && NILP (Vinhibit_read_only
))
985 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
989 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
990 "Put BUFFER at the end of the list of all buffers.\n\
991 There it is the least likely candidate for `other-buffer' to return;\n\
992 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
993 If BUFFER is nil or omitted, bury the current buffer.\n\
994 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
995 selected window if it is displayed there.")
997 register Lisp_Object buf
;
999 /* Figure out what buffer we're going to bury. */
1002 XSET (buf
, Lisp_Buffer
, current_buffer
);
1004 /* If we're burying the current buffer, unshow it. */
1005 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1011 buf1
= Fget_buffer (buf
);
1017 /* Move buf to the end of the buffer list. */
1019 register Lisp_Object aelt
, link
;
1021 aelt
= Frassq (buf
, Vbuffer_alist
);
1022 link
= Fmemq (aelt
, Vbuffer_alist
);
1023 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1024 XCONS (link
)->cdr
= Qnil
;
1025 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1031 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1032 "Delete the entire contents of the current buffer.\n\
1033 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1034 so the buffer is truly empty after this.")
1039 current_buffer
->last_window_start
= 1;
1040 /* Prevent warnings, or suspension of auto saving, that would happen
1041 if future size is less than past size. Use of erase-buffer
1042 implies that the future text is not really related to the past text. */
1043 XFASTINT (current_buffer
->save_length
) = 0;
1047 validate_region (b
, e
)
1048 register Lisp_Object
*b
, *e
;
1052 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1053 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1055 if (XINT (*b
) > XINT (*e
))
1057 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1059 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1062 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1063 && XINT (*e
) <= ZV
))
1064 args_out_of_range (*b
, *e
);
1068 list_buffers_1 (files
)
1071 register Lisp_Object tail
, tem
, buf
;
1072 Lisp_Object col1
, col2
, col3
, minspace
;
1073 register struct buffer
*old
= current_buffer
, *b
;
1074 Lisp_Object desired_point
;
1075 Lisp_Object other_file_symbol
;
1077 desired_point
= Qnil
;
1078 other_file_symbol
= intern ("list-buffers-directory");
1080 XFASTINT (col1
) = 19;
1081 XFASTINT (col2
) = 25;
1082 XFASTINT (col3
) = 40;
1083 XFASTINT (minspace
) = 1;
1085 Fset_buffer (Vstandard_output
);
1087 tail
= intern ("Buffer-menu-mode");
1088 if (!EQ (tail
, current_buffer
->major_mode
)
1089 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1091 Fbuffer_disable_undo (Vstandard_output
);
1092 current_buffer
->read_only
= Qnil
;
1095 MR Buffer Size Mode File\n\
1096 -- ------ ---- ---- ----\n", -1);
1098 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1100 buf
= Fcdr (Fcar (tail
));
1102 /* Don't mention the minibuffers. */
1103 if (XSTRING (b
->name
)->data
[0] == ' ')
1105 /* Optionally don't mention buffers that lack files. */
1106 if (!NILP (files
) && NILP (b
->filename
))
1108 /* Identify the current buffer. */
1110 XFASTINT (desired_point
) = point
;
1111 write_string (b
== old
? "." : " ", -1);
1112 /* Identify modified buffers */
1113 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1114 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1115 Fprinc (b
->name
, Qnil
);
1116 Findent_to (col1
, make_number (2));
1117 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1119 Findent_to (col2
, minspace
);
1120 Fprinc (b
->mode_name
, Qnil
);
1121 Findent_to (col3
, minspace
);
1123 if (!NILP (b
->filename
))
1124 Fprinc (b
->filename
, Qnil
);
1127 /* No visited file; check local value of list-buffers-directory. */
1129 set_buffer_internal (b
);
1130 tem
= Fboundp (other_file_symbol
);
1133 tem
= Fsymbol_value (other_file_symbol
);
1134 Fset_buffer (Vstandard_output
);
1135 if (XTYPE (tem
) == Lisp_String
)
1139 Fset_buffer (Vstandard_output
);
1141 write_string ("\n", -1);
1144 current_buffer
->read_only
= Qt
;
1145 set_buffer_internal (old
);
1146 return desired_point
;
1149 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1150 "Display a list of names of existing buffers.\n\
1151 The list is displayed in a buffer named `*Buffer List*'.\n\
1152 Note that buffers with names starting with spaces are omitted.\n\
1153 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1155 The M column contains a * for buffers that are modified.\n\
1156 The R column contains a % for buffers that are read-only.")
1160 Lisp_Object desired_point
;
1163 = internal_with_output_to_temp_buffer ("*Buffer List*",
1164 list_buffers_1
, files
);
1166 if (NUMBERP (desired_point
))
1168 int count
= specpdl_ptr
- specpdl
;
1169 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1170 Fset_buffer (build_string ("*Buffer List*"));
1171 SET_PT (XINT (desired_point
));
1172 return unbind_to (count
, Qnil
);
1177 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1179 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1180 Most local variable bindings are eliminated so that the default values\n\
1181 become effective once more. Also, the syntax table is set from\n\
1182 `standard-syntax-table', the local keymap is set to nil,\n\
1183 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1184 This function also forces redisplay of the mode line.\n\
1186 Every function to select a new major mode starts by\n\
1187 calling this function.\n\n\
1188 As a special exception, local variables whose names have\n\
1189 a non-nil `permanent-local' property are not eliminated by this function.")
1192 register Lisp_Object alist
, sym
, tem
;
1194 oalist
= current_buffer
->local_var_alist
;
1196 /* Make sure no local variables remain set up with this buffer
1197 for their current values. */
1199 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1201 sym
= XCONS (XCONS (alist
)->car
)->car
;
1203 /* Need not do anything if some other buffer's binding is now encached. */
1204 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1205 if (XBUFFER (tem
) == current_buffer
)
1207 /* Symbol is set up for this buffer's old local value.
1208 Set it up for the current buffer with the default value. */
1210 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1211 /* Store the symbol's current value into the alist entry
1212 it is currently set up for. This is so that, if the
1213 local is marked permanent, and we make it local again below,
1214 we don't lose the value. */
1215 XCONS (XCONS (tem
)->car
)->cdr
= XCONS (XSYMBOL (sym
)->value
)->car
;
1216 /* Switch to the symbol's default-value alist entry. */
1217 XCONS (tem
)->car
= tem
;
1218 /* Mark it as current for the current buffer. */
1219 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1220 /* Store the current value into any forwarding in the symbol. */
1221 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1226 /* Actually eliminate all local bindings of this buffer. */
1228 reset_buffer_local_variables (current_buffer
);
1230 /* Redisplay mode lines; we are changing major mode. */
1232 update_mode_lines
++;
1234 /* Any which are supposed to be permanent,
1235 make local again, with the same values they had. */
1237 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1239 sym
= XCONS (XCONS (alist
)->car
)->car
;
1240 tem
= Fget (sym
, Qpermanent_local
);
1243 Fmake_local_variable (sym
);
1244 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1248 /* Force mode-line redisplay. Useful here because all major mode
1249 commands call this function. */
1250 update_mode_lines
++;
1255 /* Find all the overlays in the current buffer that contain position POS.
1256 Return the number found, and store them in a vector in *VEC_PTR.
1257 Store in *LEN_PTR the size allocated for the vector.
1258 Store in *NEXT_PTR the next position after POS where an overlay starts,
1259 or ZV if there are no more overlays.
1261 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1262 when this function is called.
1264 If EXTEND is non-zero, we make the vector bigger if necessary.
1265 If EXTEND is zero, we never extend the vector,
1266 and we store only as many overlays as will fit.
1267 But we still return the total number of overlays. */
1270 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1273 Lisp_Object
**vec_ptr
;
1277 Lisp_Object tail
, overlay
, start
, end
, result
;
1280 Lisp_Object
*vec
= *vec_ptr
;
1282 int inhibit_storing
= 0;
1284 for (tail
= current_buffer
->overlays_before
;
1286 tail
= XCONS (tail
)->cdr
)
1290 overlay
= XCONS (tail
)->car
;
1291 if (! OVERLAY_VALID (overlay
))
1294 start
= OVERLAY_START (overlay
);
1295 end
= OVERLAY_END (overlay
);
1296 if (OVERLAY_POSITION (end
) <= pos
)
1298 startpos
= OVERLAY_POSITION (start
);
1299 if (startpos
<= pos
)
1303 /* The supplied vector is full.
1304 Either make it bigger, or don't store any more in it. */
1307 *len_ptr
= len
*= 2;
1308 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1312 inhibit_storing
= 1;
1315 if (!inhibit_storing
)
1317 /* Keep counting overlays even if we can't return them all. */
1320 else if (startpos
< next
)
1324 for (tail
= current_buffer
->overlays_after
;
1326 tail
= XCONS (tail
)->cdr
)
1330 overlay
= XCONS (tail
)->car
;
1331 if (! OVERLAY_VALID (overlay
))
1334 start
= OVERLAY_START (overlay
);
1335 end
= OVERLAY_END (overlay
);
1336 startpos
= OVERLAY_POSITION (start
);
1339 if (startpos
< next
)
1343 if (pos
< OVERLAY_POSITION (end
))
1349 *len_ptr
= len
*= 2;
1350 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1354 inhibit_storing
= 1;
1357 if (!inhibit_storing
)
1367 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1370 recenter_overlay_lists (buf
, pos
)
1374 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1376 /* See if anything in overlays_before should move to overlays_after. */
1378 /* We don't strictly need prev in this loop; it should always be nil.
1379 But we use it for symmetry and in case that should cease to be true
1380 with some future change. */
1382 for (tail
= buf
->overlays_before
;
1384 prev
= tail
, tail
= next
)
1386 next
= XCONS (tail
)->cdr
;
1387 overlay
= XCONS (tail
)->car
;
1389 /* If the overlay is not valid, get rid of it. */
1390 if (!OVERLAY_VALID (overlay
))
1395 /* Splice the cons cell TAIL out of overlays_before. */
1397 XCONS (prev
)->cdr
= next
;
1399 buf
->overlays_before
= next
;
1405 beg
= OVERLAY_START (overlay
);
1406 end
= OVERLAY_END (overlay
);
1408 if (OVERLAY_POSITION (end
) > pos
)
1410 /* OVERLAY needs to be moved. */
1411 int where
= OVERLAY_POSITION (beg
);
1412 Lisp_Object other
, other_prev
;
1414 /* Splice the cons cell TAIL out of overlays_before. */
1416 XCONS (prev
)->cdr
= next
;
1418 buf
->overlays_before
= next
;
1420 /* Search thru overlays_after for where to put it. */
1422 for (other
= buf
->overlays_after
;
1424 other_prev
= other
, other
= XCONS (other
)->cdr
)
1426 Lisp_Object otherbeg
, otheroverlay
, follower
;
1429 otheroverlay
= XCONS (other
)->car
;
1430 if (! OVERLAY_VALID (otheroverlay
))
1433 otherbeg
= OVERLAY_START (otheroverlay
);
1434 if (OVERLAY_POSITION (otherbeg
) >= where
)
1438 /* Add TAIL to overlays_after before OTHER. */
1439 XCONS (tail
)->cdr
= other
;
1440 if (!NILP (other_prev
))
1441 XCONS (other_prev
)->cdr
= tail
;
1443 buf
->overlays_after
= tail
;
1447 /* We've reached the things that should stay in overlays_before.
1448 All the rest of overlays_before must end even earlier,
1453 /* See if anything in overlays_after should be in overlays_before. */
1455 for (tail
= buf
->overlays_after
;
1457 prev
= tail
, tail
= next
)
1459 next
= XCONS (tail
)->cdr
;
1460 overlay
= XCONS (tail
)->car
;
1462 /* If the overlay is not valid, get rid of it. */
1463 if (!OVERLAY_VALID (overlay
))
1468 /* Splice the cons cell TAIL out of overlays_after. */
1470 XCONS (prev
)->cdr
= next
;
1472 buf
->overlays_after
= next
;
1478 beg
= OVERLAY_START (overlay
);
1479 end
= OVERLAY_END (overlay
);
1481 /* Stop looking, when we know that nothing further
1482 can possibly end before POS. */
1483 if (OVERLAY_POSITION (beg
) > pos
)
1486 if (OVERLAY_POSITION (end
) <= pos
)
1488 /* OVERLAY needs to be moved. */
1489 int where
= OVERLAY_POSITION (end
);
1490 Lisp_Object other
, other_prev
;
1492 /* Splice the cons cell TAIL out of overlays_after. */
1494 XCONS (prev
)->cdr
= next
;
1496 buf
->overlays_after
= next
;
1498 /* Search thru overlays_before for where to put it. */
1500 for (other
= buf
->overlays_before
;
1502 other_prev
= other
, other
= XCONS (other
)->cdr
)
1504 Lisp_Object otherend
, otheroverlay
;
1507 otheroverlay
= XCONS (other
)->car
;
1508 if (! OVERLAY_VALID (otheroverlay
))
1511 otherend
= OVERLAY_END (otheroverlay
);
1512 if (OVERLAY_POSITION (otherend
) <= where
)
1516 /* Add TAIL to overlays_before before OTHER. */
1517 XCONS (tail
)->cdr
= other
;
1518 if (!NILP (other_prev
))
1519 XCONS (other_prev
)->cdr
= tail
;
1521 buf
->overlays_before
= tail
;
1526 XFASTINT (buf
->overlay_center
) = pos
;
1529 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1530 "Return t if OBJECT is an overlay.")
1534 return (OVERLAYP (object
) ? Qt
: Qnil
);
1537 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1538 "Create a new overlay with range BEG to END in BUFFER.\n\
1539 If omitted, BUFFER defaults to the current buffer.\n\
1540 BEG and END may be integers or markers.")
1542 Lisp_Object beg
, end
, buffer
;
1544 Lisp_Object overlay
;
1548 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1550 CHECK_BUFFER (buffer
, 2);
1552 && ! EQ (Fmarker_buffer (beg
), buffer
))
1553 error ("Marker points into wrong buffer");
1555 && ! EQ (Fmarker_buffer (end
), buffer
))
1556 error ("Marker points into wrong buffer");
1558 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1559 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1561 if (XINT (beg
) > XINT (end
))
1563 Lisp_Object temp
= beg
;
1564 beg
= end
; end
= temp
;
1567 b
= XBUFFER (buffer
);
1569 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1570 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1572 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1573 XSETTYPE (overlay
, Lisp_Overlay
);
1575 /* Put the new overlay on the wrong list. */
1576 end
= OVERLAY_END (overlay
);
1577 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1578 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1580 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1582 /* This puts it in the right list, and in the right order. */
1583 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1585 /* We don't need to redisplay the region covered by the overlay, because
1586 the overlay has no properties at the moment. */
1591 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1592 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1593 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1594 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1596 (overlay
, beg
, end
, buffer
)
1597 Lisp_Object overlay
, beg
, end
, buffer
;
1599 struct buffer
*b
, *ob
;
1600 Lisp_Object obuffer
;
1601 int count
= specpdl_ptr
- specpdl
;
1603 CHECK_OVERLAY (overlay
, 0);
1605 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1607 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1608 CHECK_BUFFER (buffer
, 3);
1611 && ! EQ (Fmarker_buffer (beg
), buffer
))
1612 error ("Marker points into wrong buffer");
1614 && ! EQ (Fmarker_buffer (end
), buffer
))
1615 error ("Marker points into wrong buffer");
1617 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1618 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1620 specbind (Qinhibit_quit
, Qt
);
1622 if (XINT (beg
) > XINT (end
))
1624 Lisp_Object temp
= beg
;
1625 beg
= end
; end
= temp
;
1628 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1629 b
= XBUFFER (buffer
);
1630 ob
= XBUFFER (obuffer
);
1632 /* If the overlay has changed buffers, do a thorough redisplay. */
1633 if (!EQ (buffer
, obuffer
))
1634 windows_or_buffers_changed
= 1;
1636 /* Redisplay the area the overlay has just left, or just enclosed. */
1640 int change_beg
, change_end
;
1642 o_beg
= OVERLAY_START (overlay
);
1643 o_end
= OVERLAY_END (overlay
);
1644 o_beg
= OVERLAY_POSITION (o_beg
);
1645 o_end
= OVERLAY_POSITION (o_end
);
1647 if (XINT (o_beg
) == XINT (beg
))
1648 redisplay_region (b
, XINT (o_end
), XINT (end
));
1649 else if (XINT (o_end
) == XINT (end
))
1650 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1653 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1654 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1655 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1659 if (!NILP (obuffer
))
1661 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1662 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1665 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1666 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1668 /* Put the overlay on the wrong list. */
1669 end
= OVERLAY_END (overlay
);
1670 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1671 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1673 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1675 /* This puts it in the right list, and in the right order. */
1676 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1678 return unbind_to (count
, overlay
);
1681 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1682 "Delete the overlay OVERLAY from its buffer.")
1684 Lisp_Object overlay
;
1688 int count
= specpdl_ptr
- specpdl
;
1690 CHECK_OVERLAY (overlay
, 0);
1692 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1696 b
= XBUFFER (buffer
);
1698 specbind (Qinhibit_quit
, Qt
);
1700 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1701 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1703 redisplay_region (b
,
1704 marker_position (OVERLAY_START (overlay
)),
1705 marker_position (OVERLAY_END (overlay
)));
1707 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1708 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1710 return unbind_to (count
, Qnil
);
1713 /* Overlay dissection functions. */
1715 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1716 "Return the position at which OVERLAY starts.")
1718 Lisp_Object overlay
;
1720 CHECK_OVERLAY (overlay
, 0);
1722 return (Fmarker_position (OVERLAY_START (overlay
)));
1725 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1726 "Return the position at which OVERLAY ends.")
1728 Lisp_Object overlay
;
1730 CHECK_OVERLAY (overlay
, 0);
1732 return (Fmarker_position (OVERLAY_END (overlay
)));
1735 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1736 "Return the buffer OVERLAY belongs to.")
1738 Lisp_Object overlay
;
1740 CHECK_OVERLAY (overlay
, 0);
1742 return Fmarker_buffer (OVERLAY_START (overlay
));
1745 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1746 "Return a list of the properties on OVERLAY.\n\
1747 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1750 Lisp_Object overlay
;
1752 CHECK_OVERLAY (overlay
, 0);
1754 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1758 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1759 "Return a list of the overlays that contain position POS.")
1765 Lisp_Object
*overlay_vec
;
1769 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1772 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1774 /* Put all the overlays we want in a vector in overlay_vec.
1775 Store the length in len. */
1776 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1778 /* Make a list of them all. */
1779 result
= Flist (noverlays
, overlay_vec
);
1781 xfree (overlay_vec
);
1785 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1787 "Return the next position after POS where an overlay starts or ends.")
1793 Lisp_Object
*overlay_vec
;
1798 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1801 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1803 /* Put all the overlays we want in a vector in overlay_vec.
1804 Store the length in len.
1805 endpos gets the position where the next overlay starts. */
1806 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1808 /* If any of these overlays ends before endpos,
1809 use its ending point instead. */
1810 for (i
= 0; i
< noverlays
; i
++)
1815 oend
= OVERLAY_END (overlay_vec
[i
]);
1816 oendpos
= OVERLAY_POSITION (oend
);
1817 if (oendpos
< endpos
)
1821 xfree (overlay_vec
);
1822 return make_number (endpos
);
1825 /* These functions are for debugging overlays. */
1827 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1828 "Return a pair of lists giving all the overlays of the current buffer.\n\
1829 The car has all the overlays before the overlay center;\n\
1830 the cdr has all the overlays before the overlay center.\n\
1831 Recentering overlays moves overlays between these lists.\n\
1832 The lists you get are copies, so that changing them has no effect.\n\
1833 However, the overlays you get are the real objects that the buffer uses.")
1836 Lisp_Object before
, after
;
1837 before
= current_buffer
->overlays_before
;
1839 before
= Fcopy_sequence (before
);
1840 after
= current_buffer
->overlays_after
;
1842 after
= Fcopy_sequence (after
);
1844 return Fcons (before
, after
);
1847 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1848 "Recenter the overlays of the current buffer around position POS.")
1852 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1854 recenter_overlay_lists (current_buffer
, XINT (pos
));
1858 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1859 "Get the property of overlay OVERLAY with property name NAME.")
1861 Lisp_Object overlay
, prop
;
1865 CHECK_OVERLAY (overlay
, 0);
1867 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1868 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1869 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1871 if (EQ (XCONS (plist
)->car
, prop
))
1872 return XCONS (XCONS (plist
)->cdr
)->car
;
1878 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1879 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1880 (overlay
, prop
, value
)
1881 Lisp_Object overlay
, prop
, value
;
1883 Lisp_Object plist
, tail
;
1885 CHECK_OVERLAY (overlay
, 0);
1887 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
1889 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1890 marker_position (OVERLAY_START (overlay
)),
1891 marker_position (OVERLAY_END (overlay
)));
1893 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1896 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1897 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1899 if (EQ (XCONS (tail
)->car
, prop
))
1900 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
1903 if (! CONSP (XCONS (overlay
)->cdr
))
1904 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
1906 XCONS (XCONS (overlay
)->cdr
)->cdr
1907 = Fcons (prop
, Fcons (value
, plist
));
1912 /* Run the modification-hooks of overlays that include
1913 any part of the text in START to END.
1914 Run the insert-before-hooks of overlay starting at END,
1915 and the insert-after-hooks of overlay ending at START. */
1918 verify_overlay_modification (start
, end
)
1919 Lisp_Object start
, end
;
1921 Lisp_Object prop
, overlay
, tail
;
1922 int insertion
= EQ (start
, end
);
1924 for (tail
= current_buffer
->overlays_before
;
1926 tail
= XCONS (tail
)->cdr
)
1928 int startpos
, endpos
;
1929 Lisp_Object ostart
, oend
;
1931 overlay
= XCONS (tail
)->car
;
1933 ostart
= OVERLAY_START (overlay
);
1934 oend
= OVERLAY_END (overlay
);
1935 endpos
= OVERLAY_POSITION (oend
);
1936 if (XFASTINT (start
) > endpos
)
1938 startpos
= OVERLAY_POSITION (ostart
);
1939 if (XFASTINT (end
) == startpos
&& insertion
)
1941 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
1942 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1944 if (XFASTINT (start
) == endpos
&& insertion
)
1946 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
1947 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1950 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
1951 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
1953 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
1954 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1958 for (tail
= current_buffer
->overlays_after
;
1960 tail
= XCONS (tail
)->cdr
)
1962 int startpos
, endpos
;
1963 Lisp_Object ostart
, oend
;
1965 overlay
= XCONS (tail
)->car
;
1967 ostart
= OVERLAY_START (overlay
);
1968 oend
= OVERLAY_END (overlay
);
1969 startpos
= OVERLAY_POSITION (ostart
);
1970 endpos
= OVERLAY_POSITION (oend
);
1971 if (XFASTINT (end
) < startpos
)
1973 if (XFASTINT (end
) == startpos
&& insertion
)
1975 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
1976 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1978 if (XFASTINT (start
) == endpos
&& insertion
)
1980 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
1981 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1984 ? (XFASTINT (start
) > startpos
&& XFASTINT (end
) < endpos
)
1985 : (XFASTINT (start
) >= startpos
&& XFASTINT (end
) <= endpos
))
1987 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
1988 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
1994 call_overlay_mod_hooks (list
, overlay
, start
, end
)
1995 Lisp_Object list
, overlay
, start
, end
;
1997 struct gcpro gcpro1
;
1999 while (!NILP (list
))
2001 call3 (Fcar (list
), overlay
, start
, end
);
2007 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2008 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2010 buffer_slot_type_mismatch (valcontents
, newval
)
2011 Lisp_Object valcontents
, newval
;
2013 unsigned int offset
= XUINT (valcontents
);
2014 unsigned char *symbol_name
=
2015 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2019 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2021 case Lisp_Int
: type_name
= "integers"; break;
2022 case Lisp_String
: type_name
= "strings"; break;
2023 case Lisp_Marker
: type_name
= "markers"; break;
2024 case Lisp_Symbol
: type_name
= "symbols"; break;
2025 case Lisp_Cons
: type_name
= "lists"; break;
2026 case Lisp_Vector
: type_name
= "vectors"; break;
2031 error ("only %s should be stored in the buffer-local variable %s",
2032 type_name
, symbol_name
);
2037 register Lisp_Object tem
;
2039 /* Make sure all markable slots in buffer_defaults
2040 are initialized reasonably, so mark_buffer won't choke. */
2041 reset_buffer (&buffer_defaults
);
2042 reset_buffer (&buffer_local_symbols
);
2043 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2044 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2046 /* Set up the default values of various buffer slots. */
2047 /* Must do these before making the first buffer! */
2049 /* real setup is done in loaddefs.el */
2050 buffer_defaults
.mode_line_format
= build_string ("%-");
2051 buffer_defaults
.abbrev_mode
= Qnil
;
2052 buffer_defaults
.overwrite_mode
= Qnil
;
2053 buffer_defaults
.case_fold_search
= Qt
;
2054 buffer_defaults
.auto_fill_function
= Qnil
;
2055 buffer_defaults
.selective_display
= Qnil
;
2057 buffer_defaults
.selective_display_ellipses
= Qt
;
2059 buffer_defaults
.abbrev_table
= Qnil
;
2060 buffer_defaults
.display_table
= Qnil
;
2061 buffer_defaults
.undo_list
= Qnil
;
2062 buffer_defaults
.mark_active
= Qnil
;
2063 buffer_defaults
.overlays_before
= Qnil
;
2064 buffer_defaults
.overlays_after
= Qnil
;
2065 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2067 XFASTINT (buffer_defaults
.tab_width
) = 8;
2068 buffer_defaults
.truncate_lines
= Qnil
;
2069 buffer_defaults
.ctl_arrow
= Qt
;
2072 buffer_defaults
.buffer_file_type
= 0; /* TEXT */
2074 XFASTINT (buffer_defaults
.fill_column
) = 70;
2075 XFASTINT (buffer_defaults
.left_margin
) = 0;
2077 /* Assign the local-flags to the slots that have default values.
2078 The local flag is a bit that is used in the buffer
2079 to say that it has its own local value for the slot.
2080 The local flag bits are in the local_var_flags slot of the buffer. */
2082 /* Nothing can work if this isn't true */
2083 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2085 /* 0 means not a lisp var, -1 means always local, else mask */
2086 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2087 XFASTINT (buffer_local_flags
.filename
) = -1;
2088 XFASTINT (buffer_local_flags
.directory
) = -1;
2089 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2090 XFASTINT (buffer_local_flags
.save_length
) = -1;
2091 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2092 XFASTINT (buffer_local_flags
.read_only
) = -1;
2093 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2094 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2095 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2096 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2098 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2099 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2100 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2101 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2102 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2103 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2105 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2107 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2108 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2109 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2110 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2111 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2112 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2113 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2114 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2116 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2119 Vbuffer_alist
= Qnil
;
2123 QSFundamental
= build_string ("Fundamental");
2125 Qfundamental_mode
= intern ("fundamental-mode");
2126 buffer_defaults
.major_mode
= Qfundamental_mode
;
2128 Qmode_class
= intern ("mode-class");
2130 Qprotected_field
= intern ("protected-field");
2132 Qpermanent_local
= intern ("permanent-local");
2134 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2136 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2137 /* super-magic invisible buffer */
2138 Vbuffer_alist
= Qnil
;
2140 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2145 char buf
[MAXPATHLEN
+1];
2147 struct stat dotstat
, pwdstat
;
2150 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2152 /* If PWD is accurate, use it instead of calling getwd. This is faster
2153 when PWD is right, and may avoid a fatal error. */
2154 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2155 && stat (pwd
, &pwdstat
) == 0
2156 && stat (".", &dotstat
) == 0
2157 && dotstat
.st_ino
== pwdstat
.st_ino
2158 && dotstat
.st_dev
== pwdstat
.st_dev
2159 && strlen (pwd
) < MAXPATHLEN
)
2161 else if (getwd (buf
) == 0)
2162 fatal ("`getwd' failed: %s.\n", buf
);
2165 /* Maybe this should really use some standard subroutine
2166 whose definition is filename syntax dependent. */
2167 if (buf
[strlen (buf
) - 1] != '/')
2169 #endif /* not VMS */
2170 current_buffer
->directory
= build_string (buf
);
2172 temp
= get_minibuffer (0);
2173 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2176 /* initialize the buffer routines */
2179 extern Lisp_Object Qdisabled
;
2181 staticpro (&Vbuffer_defaults
);
2182 staticpro (&Vbuffer_local_symbols
);
2183 staticpro (&Qfundamental_mode
);
2184 staticpro (&Qmode_class
);
2185 staticpro (&QSFundamental
);
2186 staticpro (&Vbuffer_alist
);
2187 staticpro (&Qprotected_field
);
2188 staticpro (&Qpermanent_local
);
2189 staticpro (&Qkill_buffer_hook
);
2190 staticpro (&Qoverlayp
);
2191 staticpro (&Qmodification_hooks
);
2192 Qmodification_hooks
= intern ("modification-hooks");
2193 staticpro (&Qinsert_in_front_hooks
);
2194 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2195 staticpro (&Qinsert_behind_hooks
);
2196 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2197 staticpro (&Qget_file_buffer
);
2198 Qget_file_buffer
= intern ("get-file-buffer");
2200 Qoverlayp
= intern ("overlayp");
2202 Fput (Qprotected_field
, Qerror_conditions
,
2203 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2204 Fput (Qprotected_field
, Qerror_message
,
2205 build_string ("Attempt to modify a protected field"));
2207 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
2209 /* All these use DEFVAR_LISP_NOPRO because the slots in
2210 buffer_defaults will all be marked via Vbuffer_defaults. */
2212 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2213 &buffer_defaults
.mode_line_format
,
2214 "Default value of `mode-line-format' for buffers that don't override it.\n\
2215 This is the same as (default-value 'mode-line-format).");
2217 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2218 &buffer_defaults
.abbrev_mode
,
2219 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2220 This is the same as (default-value 'abbrev-mode).");
2222 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2223 &buffer_defaults
.ctl_arrow
,
2224 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2225 This is the same as (default-value 'ctl-arrow).");
2227 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2228 &buffer_defaults
.truncate_lines
,
2229 "Default value of `truncate-lines' for buffers that do not override it.\n\
2230 This is the same as (default-value 'truncate-lines).");
2232 DEFVAR_LISP_NOPRO ("default-fill-column",
2233 &buffer_defaults
.fill_column
,
2234 "Default value of `fill-column' for buffers that do not override it.\n\
2235 This is the same as (default-value 'fill-column).");
2237 DEFVAR_LISP_NOPRO ("default-left-margin",
2238 &buffer_defaults
.left_margin
,
2239 "Default value of `left-margin' for buffers that do not override it.\n\
2240 This is the same as (default-value 'left-margin).");
2242 DEFVAR_LISP_NOPRO ("default-tab-width",
2243 &buffer_defaults
.tab_width
,
2244 "Default value of `tab-width' for buffers that do not override it.\n\
2245 This is the same as (default-value 'tab-width).");
2247 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2248 &buffer_defaults
.case_fold_search
,
2249 "Default value of `case-fold-search' for buffers that don't override it.\n\
2250 This is the same as (default-value 'case-fold-search).");
2253 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2254 &buffer_defaults
.buffer_file_type
,
2255 "Default file type for buffers that do not override it.\n\
2256 This is the same as (default-value 'buffer-file-type).\n\
2257 The file type is nil for text, t for binary.");
2260 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2263 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2264 But make-docfile finds it!
2265 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2267 "Template for displaying mode line for current buffer.\n\
2268 Each buffer has its own value of this variable.\n\
2269 Value may be a string, a symbol or a list or cons cell.\n\
2270 For a symbol, its value is used (but it is ignored if t or nil).\n\
2271 A string appearing directly as the value of a symbol is processed verbatim\n\
2272 in that the %-constructs below are not recognized.\n\
2273 For a list whose car is a symbol, the symbol's value is taken,\n\
2274 and if that is non-nil, the cadr of the list is processed recursively.\n\
2275 Otherwise, the caddr of the list (if there is one) is processed.\n\
2276 For a list whose car is a string or list, each element is processed\n\
2277 recursively and the results are effectively concatenated.\n\
2278 For a list whose car is an integer, the cdr of the list is processed\n\
2279 and padded (if the number is positive) or truncated (if negative)\n\
2280 to the width specified by that number.\n\
2281 A string is printed verbatim in the mode line except for %-constructs:\n\
2282 (%-constructs are allowed when the string is the entire mode-line-format\n\
2283 or when it is found in a cons-cell or a list)\n\
2284 %b -- print buffer name. %f -- print visited file name.\n\
2285 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2286 %s -- print process status. %l -- print the current line number.\n\
2287 %p -- print percent of buffer above top of window, or top, bot or all.\n\
2288 %n -- print Narrow if appropriate.\n\
2289 %t -- print T if files is text, B if binary.\n\
2290 %[ -- print one [ for each recursive editing level. %] similar.\n\
2291 %% -- print %. %- -- print infinitely many dashes.\n\
2292 Decimal digits after the % specify field width to which to pad.");
2295 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2296 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2297 nil here means use current buffer's major mode.");
2299 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2300 make_number (Lisp_Symbol
),
2301 "Symbol for current buffer's major mode.");
2303 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2304 make_number (Lisp_String
),
2305 "Pretty name of current buffer's major mode (a string).");
2307 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2308 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2309 Automatically becomes buffer-local when set in any fashion.");
2311 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2313 "*Non-nil if searches should ignore case.\n\
2314 Automatically becomes buffer-local when set in any fashion.");
2316 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2317 make_number (Lisp_Int
),
2318 "*Column beyond which automatic line-wrapping should happen.\n\
2319 Automatically becomes buffer-local when set in any fashion.");
2321 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2322 make_number (Lisp_Int
),
2323 "*Column for the default indent-line-function to indent to.\n\
2324 Linefeed indents to this column in Fundamental mode.\n\
2325 Automatically becomes buffer-local when set in any fashion.");
2327 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2328 make_number (Lisp_Int
),
2329 "*Distance between tab stops (for display of tab characters), in columns.\n\
2330 Automatically becomes buffer-local when set in any fashion.");
2332 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2333 "*Non-nil means display control chars with uparrow.\n\
2334 Nil means use backslash and octal digits.\n\
2335 Automatically becomes buffer-local when set in any fashion.\n\
2336 This variable does not apply to characters whose display is specified\n\
2337 in the current display table (if there is one).");
2339 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2340 "*Non-nil means do not display continuation lines;\n\
2341 give each line of text one screen line.\n\
2342 Automatically becomes buffer-local when set in any fashion.\n\
2344 Note that this is overridden by the variable\n\
2345 `truncate-partial-width-windows' if that variable is non-nil\n\
2346 and this buffer is not full-frame width.");
2349 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2351 "*If visited file is text, nil; otherwise, t.");
2354 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2355 make_number (Lisp_String
),
2356 "Name of default directory of current buffer. Should end with slash.\n\
2357 Each buffer has its own value of this variable.");
2359 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2361 "Function called (if non-nil) to perform auto-fill.\n\
2362 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2363 Each buffer has its own value of this variable.\n\
2364 NOTE: This variable is not an ordinary hook;\n\
2365 It may not be a list of functions.");
2367 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2368 make_number (Lisp_String
),
2369 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2370 Each buffer has its own value of this variable.");
2372 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2373 ¤t_buffer
->auto_save_file_name
,
2374 make_number (Lisp_String
),
2375 "Name of file for auto-saving current buffer,\n\
2376 or nil if buffer should not be auto-saved.\n\
2377 Each buffer has its own value of this variable.");
2379 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2380 "Non-nil if this buffer is read-only.\n\
2381 Each buffer has its own value of this variable.");
2383 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2384 "Non-nil if this buffer's file has been backed up.\n\
2385 Backing up is done before the first time the file is saved.\n\
2386 Each buffer has its own value of this variable.");
2388 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2389 make_number (Lisp_Int
),
2390 "Length of current buffer when last read in, saved or auto-saved.\n\
2392 Each buffer has its own value of this variable.");
2394 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2396 "Non-nil enables selective display:\n\
2397 Integer N as value means display only lines\n\
2398 that start with less than n columns of space.\n\
2399 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2400 Then ^M's in the file are written into files as newlines.\n\n\
2401 Automatically becomes buffer-local when set in any fashion.");
2404 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2405 ¤t_buffer
->selective_display_ellipses
,
2407 "t means display ... on previous line when a line is invisible.\n\
2408 Automatically becomes buffer-local when set in any fashion.");
2411 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2412 "Non-nil if self-insertion should replace existing text.\n\
2413 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2414 inserts at the end of a line, and inserts when point is before a tab,\n\
2415 until the tab is filled in.\n\
2416 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2417 Automatically becomes buffer-local when set in any fashion.");
2419 #if 0 /* The doc string is too long for some compilers,
2420 but make-docfile can find it in this comment. */
2421 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2423 "Display table that controls display of the contents of current buffer.\n\
2424 Automatically becomes buffer-local when set in any fashion.\n\
2425 The display table is a vector created with `make-display-table'.\n\
2426 The first 256 elements control how to display each possible text character.\n\
2427 Each value should be a vector of characters or nil;\n\
2428 nil means display the character in the default fashion.\n\
2429 The remaining five elements control the display of\n\
2430 the end of a truncated screen line (element 256, a single character);\n\
2431 the end of a continued line (element 257, a single character);\n\
2432 the escape character used to display character codes in octal\n\
2433 (element 258, a single character);\n\
2434 the character used as an arrow for control characters (element 259,\n\
2435 a single character);\n\
2436 the decoration indicating the presence of invisible lines (element 260,\n\
2437 a vector of characters).\n\
2438 If this variable is nil, the value of `standard-display-table' is used.\n\
2439 Each window can have its own, overriding display table.");
2441 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2444 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2447 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2448 "Function to call before each text change.\n\
2449 Two arguments are passed to the function: the positions of\n\
2450 the beginning and end of the range of old text to be changed.\n\
2451 \(For an insertion, the beginning and end are at the same place.)\n\
2452 No information is given about the length of the text after the change.\n\
2453 position of the change\n\
2455 While executing the `before-change-function', changes to buffers do not\n\
2456 cause calls to any `before-change-function' or `after-change-function'.");
2457 Vbefore_change_function
= Qnil
;
2459 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2460 "Function to call after each text change.\n\
2461 Three arguments are passed to the function: the positions of\n\
2462 the beginning and end of the range of changed text,\n\
2463 and the length of the pre-change text replaced by that range.\n\
2464 \(For an insertion, the pre-change length is zero;\n\
2465 for a deletion, that length is the number of characters deleted,\n\
2466 and the post-change beginning and end are at the same place.)\n\
2468 While executing the `after-change-function', changes to buffers do not\n\
2469 cause calls to any `before-change-function' or `after-change-function'.");
2470 Vafter_change_function
= Qnil
;
2472 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2473 "A list of functions to call before changing a buffer which is unmodified.\n\
2474 The functions are run using the `run-hooks' function.");
2475 Vfirst_change_hook
= Qnil
;
2476 Qfirst_change_hook
= intern ("first-change-hook");
2477 staticpro (&Qfirst_change_hook
);
2479 #if 0 /* The doc string is too long for some compilers,
2480 but make-docfile can find it in this comment. */
2481 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2482 "List of undo entries in current buffer.\n\
2483 Recent changes come first; older changes follow newer.\n\
2485 An entry (START . END) represents an insertion which begins at\n\
2486 position START and ends at position END.\n\
2488 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2489 from (abs POSITION). If POSITION is positive, point was at the front\n\
2490 of the text being deleted; if negative, point was at the end.\n\
2492 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2493 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2494 16-bit words of the buffer's modification count at the time. If the\n\
2495 modification count of the most recent save is different, this entry is\n\
2498 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2499 was modified between BEG and END. PROP is the property name,\n\
2500 and VAL is the old value.\n\
2502 An entry of the form POSITION indicates that point was at the buffer\n\
2503 location given by the integer. Undoing an entry of this form places\n\
2504 point at POSITION.\n\
2506 nil marks undo boundaries. The undo command treats the changes\n\
2507 between two undo boundaries as a single step to be undone.\n\
2509 If the value of the variable is t, undo information is not recorded.");
2511 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2514 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2515 "Non-nil means the mark and region are currently active in this buffer.\n\
2516 Automatically local in all buffers.");
2518 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2519 "*Non-nil means deactivate the mark when the buffer contents change.");
2520 Vtransient_mark_mode
= Qnil
;
2522 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2523 "*Non-nil means disregard read-only status of buffers or characters.\n\
2524 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2525 text properties. If the value is a list, disregard `buffer-read-only'\n\
2526 and disregard a `read-only' text property if the property value\n\
2527 is a member of the list.");
2528 Vinhibit_read_only
= Qnil
;
2530 defsubr (&Sbuffer_list
);
2531 defsubr (&Sget_buffer
);
2532 defsubr (&Sget_file_buffer
);
2533 defsubr (&Sget_buffer_create
);
2534 defsubr (&Sgenerate_new_buffer_name
);
2535 defsubr (&Sbuffer_name
);
2536 /*defsubr (&Sbuffer_number);*/
2537 defsubr (&Sbuffer_file_name
);
2538 defsubr (&Sbuffer_local_variables
);
2539 defsubr (&Sbuffer_modified_p
);
2540 defsubr (&Sset_buffer_modified_p
);
2541 defsubr (&Sbuffer_modified_tick
);
2542 defsubr (&Srename_buffer
);
2543 defsubr (&Sother_buffer
);
2544 defsubr (&Sbuffer_disable_undo
);
2545 defsubr (&Sbuffer_enable_undo
);
2546 defsubr (&Skill_buffer
);
2547 defsubr (&Serase_buffer
);
2548 defsubr (&Sswitch_to_buffer
);
2549 defsubr (&Spop_to_buffer
);
2550 defsubr (&Scurrent_buffer
);
2551 defsubr (&Sset_buffer
);
2552 defsubr (&Sbarf_if_buffer_read_only
);
2553 defsubr (&Sbury_buffer
);
2554 defsubr (&Slist_buffers
);
2555 defsubr (&Skill_all_local_variables
);
2557 defsubr (&Soverlayp
);
2558 defsubr (&Smake_overlay
);
2559 defsubr (&Sdelete_overlay
);
2560 defsubr (&Smove_overlay
);
2561 defsubr (&Soverlay_start
);
2562 defsubr (&Soverlay_end
);
2563 defsubr (&Soverlay_buffer
);
2564 defsubr (&Soverlay_properties
);
2565 defsubr (&Soverlays_at
);
2566 defsubr (&Snext_overlay_change
);
2567 defsubr (&Soverlay_recenter
);
2568 defsubr (&Soverlay_lists
);
2569 defsubr (&Soverlay_get
);
2570 defsubr (&Soverlay_put
);
2575 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2576 initial_define_key (control_x_map
, 'k', "kill-buffer");
2577 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");