1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992, 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 ();
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 /* List of functions to call before changing an unmodified buffer. */
116 Lisp_Object Vfirst_change_hook
;
117 Lisp_Object Qfirst_change_hook
;
119 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
121 Lisp_Object Qprotected_field
;
123 Lisp_Object QSFundamental
; /* A string "Fundamental" */
125 Lisp_Object Qkill_buffer_hook
;
127 Lisp_Object Qoverlayp
;
129 /* For debugging; temporary. See set_buffer_internal. */
130 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
135 if (XTYPE (spec
) == Lisp_String
)
136 error ("No buffer named %s", XSTRING (spec
)->data
);
137 error ("Invalid buffer argument");
140 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
141 "Return a list of all existing live buffers.")
144 return Fmapcar (Qcdr
, Vbuffer_alist
);
147 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
148 "Return the buffer named NAME (a string).\n\
149 If there is no live buffer named NAME, return nil.\n\
150 NAME may also be a buffer; if so, the value is that buffer.")
152 register Lisp_Object name
;
154 if (XTYPE (name
) == Lisp_Buffer
)
156 CHECK_STRING (name
, 0);
158 return Fcdr (Fassoc (name
, Vbuffer_alist
));
161 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
162 "Return the buffer visiting file FILENAME (a string).\n\
163 If there is no such live buffer, return nil.")
165 register Lisp_Object filename
;
167 register Lisp_Object tail
, buf
, tem
;
168 CHECK_STRING (filename
, 0);
169 filename
= Fexpand_file_name (filename
, Qnil
);
171 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
173 buf
= Fcdr (XCONS (tail
)->car
);
174 if (XTYPE (buf
) != Lisp_Buffer
) continue;
175 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
176 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
183 /* Incremented for each buffer created, to assign the buffer number. */
186 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
187 "Return the buffer named NAME, or create such a buffer and return it.\n\
188 A new buffer is created if there is no live buffer named NAME.\n\
189 If NAME starts with a space, the new buffer does not keep undo information.\n\
190 If NAME is a buffer instead of a string, then it is the value returned.\n\
191 The value is never nil.")
193 register Lisp_Object name
;
195 register Lisp_Object buf
, function
, tem
;
196 int count
= specpdl_ptr
- specpdl
;
197 register struct buffer
*b
;
199 buf
= Fget_buffer (name
);
203 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
205 BUF_GAP_SIZE (b
) = 20;
207 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
209 if (! BUF_BEG_ADDR (b
))
219 /* Put this on the chain of all buffers including killed ones. */
220 b
->next
= all_buffers
;
223 b
->mark
= Fmake_marker ();
224 /*b->number = make_number (++buffer_count);*/
226 if (XSTRING (name
)->data
[0] != ' ')
233 /* Put this in the alist of all live buffers. */
234 XSET (buf
, Lisp_Buffer
, b
);
235 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
237 b
->mark
= Fmake_marker ();
241 function
= buffer_defaults
.major_mode
;
244 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
246 function
= current_buffer
->major_mode
;
249 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
252 /* To select a nonfundamental mode,
253 select the buffer temporarily and then call the mode function. */
255 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
260 return unbind_to (count
, buf
);
263 /* Reinitialize everything about a buffer except its name and contents. */
267 register struct buffer
*b
;
270 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
272 b
->save_modified
= 1;
273 XFASTINT (b
->save_length
) = 0;
274 b
->last_window_start
= 1;
276 b
->auto_save_modified
= 0;
277 b
->auto_save_file_name
= Qnil
;
279 b
->overlays_before
= Qnil
;
280 b
->overlays_after
= Qnil
;
281 XFASTINT (b
->overlay_center
) = 1;
283 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
284 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
286 reset_buffer_local_variables(b
);
289 reset_buffer_local_variables (b
)
290 register struct buffer
*b
;
294 /* Reset the major mode to Fundamental, together with all the
295 things that depend on the major mode.
296 default-major-mode is handled at a higher level.
297 We ignore it here. */
298 b
->major_mode
= Qfundamental_mode
;
300 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
301 b
->mode_name
= QSFundamental
;
302 b
->minor_modes
= Qnil
;
303 b
->downcase_table
= Vascii_downcase_table
;
304 b
->upcase_table
= Vascii_upcase_table
;
305 b
->case_canon_table
= Vascii_downcase_table
;
306 b
->case_eqv_table
= Vascii_upcase_table
;
307 b
->mark_active
= Qnil
;
309 b
->sort_table
= XSTRING (Vascii_sort_table
);
310 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
313 /* Reset all per-buffer variables to their defaults. */
314 b
->local_var_alist
= Qnil
;
315 b
->local_var_flags
= 0;
317 /* For each slot that has a default value,
318 copy that into the slot. */
320 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
321 offset
< sizeof (struct buffer
);
322 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
323 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
324 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
325 *(Lisp_Object
*)(offset
+ (char *)b
) =
326 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
329 /* We split this away from generate-new-buffer, because rename-buffer
330 and set-visited-file-name ought to be able to use this to really
331 rename the buffer properly. */
333 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
335 "Return a string that is the name of no existing buffer based on NAME.\n\
336 If there is no live buffer named NAME, then return NAME.\n\
337 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
338 until an unused name is found, and then return that name.")
340 register Lisp_Object name
;
342 register Lisp_Object gentemp
, tem
;
346 CHECK_STRING (name
, 0);
348 tem
= Fget_buffer (name
);
355 sprintf (number
, "<%d>", ++count
);
356 gentemp
= concat2 (name
, build_string (number
));
357 tem
= Fget_buffer (gentemp
);
364 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
365 "Return the name of BUFFER, as a string.\n\
366 With no argument or nil as argument, return the name of the current buffer.")
368 register Lisp_Object buffer
;
371 return current_buffer
->name
;
372 CHECK_BUFFER (buffer
, 0);
373 return XBUFFER (buffer
)->name
;
376 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
377 "Return name of file BUFFER is visiting, or nil if none.\n\
378 No argument or nil as argument means use the current buffer.")
380 register Lisp_Object buffer
;
383 return current_buffer
->filename
;
384 CHECK_BUFFER (buffer
, 0);
385 return XBUFFER (buffer
)->filename
;
388 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
389 Sbuffer_local_variables
, 0, 1, 0,
390 "Return an alist of variables that are buffer-local in BUFFER.\n\
391 Each element looks like (SYMBOL . VALUE) and describes one variable.\n\
392 Note that storing new VALUEs in these elements doesn't change the variables.\n\
393 No argument or nil as argument means use current buffer as BUFFER.")
395 register Lisp_Object buffer
;
397 register struct buffer
*buf
;
398 register Lisp_Object val
;
401 buf
= current_buffer
;
404 CHECK_BUFFER (buffer
, 0);
405 buf
= XBUFFER (buffer
);
409 /* Reference each variable in the alist in our current buffer.
410 If inquiring about the current buffer, this gets the current values,
411 so store them into the alist so the alist is up to date.
412 If inquiring about some other buffer, this swaps out any values
413 for that buffer, making the alist up to date automatically. */
414 register Lisp_Object tem
;
415 for (tem
= buf
->local_var_alist
; CONSP (tem
); tem
= XCONS (tem
)->cdr
)
417 Lisp_Object v1
= Fsymbol_value (XCONS (XCONS (tem
)->car
)->car
);
418 if (buf
== current_buffer
)
419 XCONS (XCONS (tem
)->car
)->cdr
= v1
;
423 /* Make a copy of the alist, to return it. */
424 val
= Fcopy_alist (buf
->local_var_alist
);
426 /* Add on all the variables stored in special slots. */
428 register int offset
, mask
;
430 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
431 offset
< sizeof (struct buffer
);
432 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
434 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
435 if (mask
== -1 || (buf
->local_var_flags
& mask
))
436 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
438 val
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
439 *(Lisp_Object
*)(offset
+ (char *)buf
)),
447 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
449 "Return t if BUFFER was modified since its file was last read or saved.\n\
450 No argument or nil as argument means use current buffer as BUFFER.")
452 register Lisp_Object buffer
;
454 register struct buffer
*buf
;
456 buf
= current_buffer
;
459 CHECK_BUFFER (buffer
, 0);
460 buf
= XBUFFER (buffer
);
463 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
466 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
468 "Mark current buffer as modified or unmodified according to FLAG.\n\
469 A non-nil FLAG means mark the buffer modified.")
471 register Lisp_Object flag
;
473 register int already
;
474 register Lisp_Object fn
;
476 #ifdef CLASH_DETECTION
477 /* If buffer becoming modified, lock the file.
478 If buffer becoming unmodified, unlock the file. */
480 fn
= current_buffer
->filename
;
483 already
= current_buffer
->save_modified
< MODIFF
;
484 if (!already
&& !NILP (flag
))
486 else if (already
&& NILP (flag
))
489 #endif /* CLASH_DETECTION */
491 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
496 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
498 "Return BUFFER's tick counter, incremented for each change in text.\n\
499 Each buffer has a tick counter which is incremented each time the text in\n\
500 that buffer is changed. It wraps around occasionally.\n\
501 No argument or nil as argument means use current buffer as BUFFER.")
503 register Lisp_Object buffer
;
505 register struct buffer
*buf
;
507 buf
= current_buffer
;
510 CHECK_BUFFER (buffer
, 0);
511 buf
= XBUFFER (buffer
);
514 return make_number (BUF_MODIFF (buf
));
517 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
518 "sRename buffer (to new name): \nP",
519 "Change current buffer's name to NEWNAME (a string).\n\
520 If second arg UNIQUE is nil or omitted, it is an error if a\n\
521 buffer named NEWNAME already exists.\n\
522 If UNIQUE is non-nil, come up with a new name using\n\
523 `generate-new-buffer-name'.\n\
524 Interactively, you can set UNIQUE with a prefix argument.\n\
525 We return the name we actually gave the buffer.\n\
526 This does not change the name of the visited file (if any).")
528 register Lisp_Object name
, unique
;
530 register Lisp_Object tem
, buf
;
532 CHECK_STRING (name
, 0);
533 tem
= Fget_buffer (name
);
534 if (XBUFFER (tem
) == current_buffer
)
535 return current_buffer
->name
;
539 name
= Fgenerate_new_buffer_name (name
);
541 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
544 current_buffer
->name
= name
;
546 /* Catch redisplay's attention. Unless we do this, the mode lines for
547 any windows displaying current_buffer will stay unchanged. */
550 XSET (buf
, Lisp_Buffer
, current_buffer
);
551 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
552 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
553 call0 (intern ("rename-auto-save-file"));
557 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
558 "Return most recently selected buffer other than BUFFER.\n\
559 Buffers not visible in windows are preferred to visible buffers,\n\
560 unless optional second argument VISIBLE-OK is non-nil.\n\
561 If no other buffer exists, the buffer `*scratch*' is returned.\n\
562 If BUFFER is omitted or nil, some interesting buffer is returned.")
564 register Lisp_Object buffer
, visible_ok
;
566 register Lisp_Object tail
, buf
, notsogood
, tem
;
569 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
571 buf
= Fcdr (Fcar (tail
));
572 if (EQ (buf
, buffer
))
574 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
576 if (NILP (visible_ok
))
577 tem
= Fget_buffer_window (buf
, Qnil
);
582 if (NILP (notsogood
))
585 if (!NILP (notsogood
))
587 return Fget_buffer_create (build_string ("*scratch*"));
590 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 1,1,
592 "Make BUFFER stop keeping undo information.")
594 register Lisp_Object buffer
;
596 Lisp_Object real_buffer
;
599 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
602 real_buffer
= Fget_buffer (buffer
);
603 if (NILP (real_buffer
))
607 XBUFFER (real_buffer
)->undo_list
= Qt
;
612 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
614 "Start keeping undo information for buffer BUFFER.\n\
615 No argument or nil as argument means do this for the current buffer.")
617 register Lisp_Object buffer
;
619 Lisp_Object real_buffer
;
622 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
625 real_buffer
= Fget_buffer (buffer
);
626 if (NILP (real_buffer
))
630 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
631 XBUFFER (real_buffer
)->undo_list
= Qnil
;
637 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
638 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
639 The buffer being killed will be current while the hook is running.\n\
642 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
643 "Kill the buffer BUFFER.\n\
644 The argument may be a buffer or may be the name of a buffer.\n\
645 An argument of nil means kill the current buffer.\n\n\
646 Value is t if the buffer is actually killed, nil if user says no.\n\n\
647 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
648 if not void, is a list of functions to be called, with no arguments,\n\
649 before the buffer is actually killed. The buffer to be killed is current\n\
650 when the hook functions are called.\n\n\
651 Any processes that have this buffer as the `process-buffer' are killed\n\
652 with `delete-process'.")
657 register struct buffer
*b
;
658 register Lisp_Object tem
;
659 register struct Lisp_Marker
*m
;
660 struct gcpro gcpro1
, gcpro2
;
663 buf
= Fcurrent_buffer ();
665 buf
= Fget_buffer (bufname
);
671 /* Query if the buffer is still modified. */
672 if (INTERACTIVE
&& !NILP (b
->filename
)
673 && BUF_MODIFF (b
) > b
->save_modified
)
675 GCPRO2 (buf
, bufname
);
676 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
677 XSTRING (b
->name
)->data
));
683 /* Run kill-buffer hook with the buffer to be killed the current buffer. */
685 register Lisp_Object val
;
686 int count
= specpdl_ptr
- specpdl
;
688 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
689 set_buffer_internal (b
);
690 call1 (Vrun_hooks
, Qkill_buffer_hook
);
691 unbind_to (count
, Qnil
);
694 /* We have no more questions to ask. Verify that it is valid
695 to kill the buffer. This must be done after the questions
696 since anything can happen within do_yes_or_no_p. */
698 /* Don't kill the minibuffer now current. */
699 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
705 /* Make this buffer not be current.
706 In the process, notice if this is the sole visible buffer
707 and give up if so. */
708 if (b
== current_buffer
)
710 tem
= Fother_buffer (buf
, Qnil
);
712 if (b
== current_buffer
)
716 /* Now there is no question: we can kill the buffer. */
718 #ifdef CLASH_DETECTION
719 /* Unlock this buffer's file, if it is locked. */
721 #endif /* CLASH_DETECTION */
723 kill_buffer_processes (buf
);
727 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
728 Freplace_buffer_in_windows (buf
);
731 /* Delete any auto-save file. */
732 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
735 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
737 unlink (XSTRING (b
->auto_save_file_name
)->data
);
740 /* Unchain all markers of this buffer
741 and leave them pointing nowhere. */
742 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
751 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
752 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
753 /* Perhaps we should explicitly free the interval tree here... */
757 BUFFER_FREE (BUF_BEG_ADDR (b
));
764 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
765 we do this each time BUF is selected visibly, the more recently
766 selected buffers are always closer to the front of the list. This
767 means that other_buffer is more likely to choose a relevant buffer. */
772 register Lisp_Object link
, prev
;
775 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
777 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
782 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
783 we cannot use Fdelq itself here because it allows quitting. */
786 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
788 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
790 XCONS(link
)->cdr
= Vbuffer_alist
;
791 Vbuffer_alist
= link
;
794 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
795 "Select buffer BUFFER in the current window.\n\
796 BUFFER may be a buffer or a buffer name.\n\
797 Optional second arg NORECORD non-nil means\n\
798 do not put this buffer at the front of the list of recently selected ones.\n\
800 WARNING: This is NOT the way to work on another buffer temporarily\n\
801 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
802 the window-buffer correspondences.")
804 Lisp_Object bufname
, norecord
;
806 register Lisp_Object buf
;
809 if (EQ (minibuf_window
, selected_window
))
810 error ("Cannot switch buffers in minibuffer window");
811 tem
= Fwindow_dedicated_p (selected_window
);
813 error ("Cannot switch buffers in a dedicated window");
816 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
818 buf
= Fget_buffer_create (bufname
);
823 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
824 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
831 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
832 "Select buffer BUFFER in some window, preferably a different one.\n\
833 If BUFFER is nil, then some other buffer is chosen.\n\
834 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
835 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
836 window even if BUFFER is already visible in the selected window.")
838 Lisp_Object bufname
, other
;
840 register Lisp_Object buf
;
842 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
844 buf
= Fget_buffer_create (bufname
);
847 Fselect_window (Fdisplay_buffer (buf
, other
));
851 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
852 "Return the current buffer as a Lisp object.")
855 register Lisp_Object buf
;
856 XSET (buf
, Lisp_Buffer
, current_buffer
);
860 /* Set the current buffer to b */
863 set_buffer_internal (b
)
864 register struct buffer
*b
;
866 register struct buffer
*old_buf
;
867 register Lisp_Object tail
, valcontents
;
870 if (current_buffer
== b
)
873 windows_or_buffers_changed
= 1;
874 old_buf
= current_buffer
;
876 last_known_column_point
= -1; /* invalidate indentation cache */
878 /* Look down buffer's list of local Lisp variables
879 to find and update any that forward into C variables. */
881 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
883 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
884 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
885 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
886 && (tem
= XTYPE (XCONS (valcontents
)->car
),
887 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
888 || tem
== Lisp_Objfwd
)))
889 /* Just reference the variable
890 to cause it to become set for this buffer. */
891 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
894 /* Do the same with any others that were local to the previous buffer */
897 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
899 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
900 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
901 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
902 && (tem
= XTYPE (XCONS (valcontents
)->car
),
903 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
904 || tem
== Lisp_Objfwd
)))
905 /* Just reference the variable
906 to cause it to become set for this buffer. */
907 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
911 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
912 "Make the buffer BUFFER current for editing operations.\n\
913 BUFFER may be a buffer or the name of an existing buffer.\n\
914 See also `save-excursion' when you want to make a buffer current temporarily.\n\
915 This function does not display the buffer, so its effect ends\n\
916 when the current command terminates.\n\
917 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
919 register Lisp_Object bufname
;
921 register Lisp_Object buffer
;
922 buffer
= Fget_buffer (bufname
);
925 if (NILP (XBUFFER (buffer
)->name
))
926 error ("Selecting deleted buffer");
927 set_buffer_internal (XBUFFER (buffer
));
931 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
932 Sbarf_if_buffer_read_only
, 0, 0, 0,
933 "Signal a `buffer-read-only' error if the current buffer is read-only.")
936 while (!NILP (current_buffer
->read_only
))
937 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
941 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
942 "Put BUFFER at the end of the list of all buffers.\n\
943 There it is the least likely candidate for `other-buffer' to return;\n\
944 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
945 If BUFFER is nil or omitted, bury the current buffer.\n\
946 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
947 selected window if it is displayed there.")
949 register Lisp_Object buf
;
951 /* Figure out what buffer we're going to bury. */
954 XSET (buf
, Lisp_Buffer
, current_buffer
);
956 /* If we're burying the current buffer, unshow it. */
957 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
963 buf1
= Fget_buffer (buf
);
969 /* Move buf to the end of the buffer list. */
971 register Lisp_Object aelt
, link
;
973 aelt
= Frassq (buf
, Vbuffer_alist
);
974 link
= Fmemq (aelt
, Vbuffer_alist
);
975 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
976 XCONS (link
)->cdr
= Qnil
;
977 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
983 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
984 "Delete the entire contents of the current buffer.\n\
985 Any clipping restriction in effect (see `narrow-to-region') is removed,\n\
986 so the buffer is truly empty after this.")
991 current_buffer
->last_window_start
= 1;
992 /* Prevent warnings, or suspension of auto saving, that would happen
993 if future size is less than past size. Use of erase-buffer
994 implies that the future text is not really related to the past text. */
995 XFASTINT (current_buffer
->save_length
) = 0;
999 validate_region (b
, e
)
1000 register Lisp_Object
*b
, *e
;
1004 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1005 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1007 if (XINT (*b
) > XINT (*e
))
1009 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1011 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1014 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1015 && XINT (*e
) <= ZV
))
1016 args_out_of_range (*b
, *e
);
1020 list_buffers_1 (files
)
1023 register Lisp_Object tail
, tem
, buf
;
1024 Lisp_Object col1
, col2
, col3
, minspace
;
1025 register struct buffer
*old
= current_buffer
, *b
;
1026 int desired_point
= 0;
1027 Lisp_Object other_file_symbol
;
1029 other_file_symbol
= intern ("list-buffers-directory");
1031 XFASTINT (col1
) = 19;
1032 XFASTINT (col2
) = 25;
1033 XFASTINT (col3
) = 40;
1034 XFASTINT (minspace
) = 1;
1036 Fset_buffer (Vstandard_output
);
1038 tail
= intern ("Buffer-menu-mode");
1039 if (!EQ (tail
, current_buffer
->major_mode
)
1040 && (tem
= Ffboundp (tail
), !NILP (tem
)))
1042 Fbuffer_disable_undo (Vstandard_output
);
1043 current_buffer
->read_only
= Qnil
;
1046 MR Buffer Size Mode File\n\
1047 -- ------ ---- ---- ----\n", -1);
1049 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1051 buf
= Fcdr (Fcar (tail
));
1053 /* Don't mention the minibuffers. */
1054 if (XSTRING (b
->name
)->data
[0] == ' ')
1056 /* Optionally don't mention buffers that lack files. */
1057 if (!NILP (files
) && NILP (b
->filename
))
1059 /* Identify the current buffer. */
1061 desired_point
= point
;
1062 write_string (b
== old
? "." : " ", -1);
1063 /* Identify modified buffers */
1064 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1065 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1066 Fprinc (b
->name
, Qnil
);
1067 Findent_to (col1
, make_number (2));
1068 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1070 Findent_to (col2
, minspace
);
1071 Fprinc (b
->mode_name
, Qnil
);
1072 Findent_to (col3
, minspace
);
1074 if (!NILP (b
->filename
))
1075 Fprinc (b
->filename
, Qnil
);
1078 /* No visited file; check local value of list-buffers-directory. */
1080 set_buffer_internal (b
);
1081 tem
= Fboundp (other_file_symbol
);
1084 tem
= Fsymbol_value (other_file_symbol
);
1085 Fset_buffer (Vstandard_output
);
1086 if (XTYPE (tem
) == Lisp_String
)
1090 Fset_buffer (Vstandard_output
);
1092 write_string ("\n", -1);
1095 current_buffer
->read_only
= Qt
;
1096 set_buffer_internal (old
);
1097 /* Foo. This doesn't work since temp_output_buffer_show sets point to 1
1099 XBUFFER (Vstandard_output)->text.pointloc = desired_point;
1104 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1105 "Display a list of names of existing buffers.\n\
1106 The list is displayed in a buffer named `*Buffer List*'.\n\
1107 Note that buffers with names starting with spaces are omitted.\n\
1108 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1110 The M column contains a * for buffers that are modified.\n\
1111 The R column contains a % for buffers that are read-only.")
1115 internal_with_output_to_temp_buffer ("*Buffer List*",
1116 list_buffers_1
, files
);
1120 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1122 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1123 Most local variable bindings are eliminated so that the default values\n\
1124 become effective once more. Also, the syntax table is set from\n\
1125 `standard-syntax-table', the local keymap is set to nil,\n\
1126 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1127 This function also forces redisplay of the mode line.\n\
1129 Every function to select a new major mode starts by\n\
1130 calling this function.\n\n\
1131 As a special exception, local variables whose names have\n\
1132 a non-nil `permanent-local' property are not eliminated by this function.")
1135 register Lisp_Object alist
, sym
, tem
;
1137 oalist
= current_buffer
->local_var_alist
;
1139 /* Make sure no local variables remain set up with this buffer
1140 for their current values. */
1142 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1144 sym
= XCONS (XCONS (alist
)->car
)->car
;
1146 /* Need not do anything if some other buffer's binding is now encached. */
1147 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1148 if (XBUFFER (tem
) == current_buffer
)
1150 /* Symbol is set up for this buffer's old local value.
1151 Set it up for the current buffer with the default value. */
1153 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1154 /* Store the symbol's current value into the alist entry
1155 it is currently set up for. This is so that, if the
1156 local is marked permanent, and we make it local again below,
1157 we don't lose the value. */
1158 XCONS (XCONS (tem
)->car
)->cdr
= XCONS (XSYMBOL (sym
)->value
)->car
;
1159 /* Switch to the symbol's default-value alist entry. */
1160 XCONS (tem
)->car
= tem
;
1161 /* Mark it as current for the current buffer. */
1162 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1163 /* Store the current value into any forwarding in the symbol. */
1164 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1169 /* Actually eliminate all local bindings of this buffer. */
1171 reset_buffer_local_variables (current_buffer
);
1173 /* Redisplay mode lines; we are changing major mode. */
1175 update_mode_lines
++;
1177 /* Any which are supposed to be permanent,
1178 make local again, with the same values they had. */
1180 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1182 sym
= XCONS (XCONS (alist
)->car
)->car
;
1183 tem
= Fget (sym
, Qpermanent_local
);
1186 Fmake_local_variable (sym
);
1187 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1191 /* Force mode-line redisplay. Useful here because all major mode
1192 commands call this function. */
1193 update_mode_lines
++;
1198 /* Find all the overlays in the current buffer that contain position POS.
1199 Return the number found, and store them in a vector in *VEC_PTR.
1200 Store in *LEN_PTR the size allocated for the vector.
1201 Store in *NEXT_PTR the next position after POS where an overlay starts,
1202 or ZV if there are no more overlays.
1204 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1205 when this function is called. */
1208 overlays_at (pos
, vec_ptr
, len_ptr
, next_ptr
)
1210 Lisp_Object
**vec_ptr
;
1214 Lisp_Object tail
, overlay
, start
, end
, result
;
1217 Lisp_Object
*vec
= *vec_ptr
;
1219 for (tail
= current_buffer
->overlays_before
;
1221 tail
= XCONS (tail
)->cdr
)
1225 overlay
= XCONS (tail
)->car
;
1226 if (! OVERLAY_VALID (overlay
))
1229 start
= OVERLAY_START (overlay
);
1230 end
= OVERLAY_END (overlay
);
1231 if (OVERLAY_POSITION (end
) <= pos
)
1233 startpos
= OVERLAY_POSITION (start
);
1234 if (startpos
<= pos
)
1238 *len_ptr
= len
*= 2;
1239 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1242 vec
[idx
++] = overlay
;
1244 else if (startpos
< next
)
1248 for (tail
= current_buffer
->overlays_after
;
1250 tail
= XCONS (tail
)->cdr
)
1254 overlay
= XCONS (tail
)->car
;
1255 if (! OVERLAY_VALID (overlay
))
1258 start
= OVERLAY_START (overlay
);
1259 end
= OVERLAY_END (overlay
);
1260 startpos
= OVERLAY_POSITION (start
);
1263 if (startpos
< next
)
1267 if (pos
< OVERLAY_POSITION (end
))
1271 *len_ptr
= len
*= 2;
1272 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1275 vec
[idx
++] = overlay
;
1283 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1286 recenter_overlay_lists (buf
, pos
)
1290 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1292 /* See if anything in overlays_before should move to overlays_after. */
1294 /* We don't strictly need prev in this loop; it should always be nil.
1295 But we use it for symmetry and in case that should cease to be true
1296 with some future change. */
1298 for (tail
= buf
->overlays_before
;
1300 prev
= tail
, tail
= next
)
1302 next
= XCONS (tail
)->cdr
;
1303 overlay
= XCONS (tail
)->car
;
1305 /* If the overlay is not valid, get rid of it. */
1306 if (!OVERLAY_VALID (overlay
))
1311 /* Splice the cons cell TAIL out of overlays_before. */
1313 XCONS (prev
)->cdr
= next
;
1315 buf
->overlays_before
= next
;
1321 beg
= OVERLAY_START (overlay
);
1322 end
= OVERLAY_END (overlay
);
1324 if (OVERLAY_POSITION (end
) > pos
)
1326 /* OVERLAY needs to be moved. */
1327 int where
= OVERLAY_POSITION (beg
);
1328 Lisp_Object other
, other_prev
;
1330 /* Splice the cons cell TAIL out of overlays_before. */
1332 XCONS (prev
)->cdr
= next
;
1334 buf
->overlays_before
= next
;
1336 /* Search thru overlays_after for where to put it. */
1338 for (other
= buf
->overlays_after
;
1340 other_prev
= other
, other
= XCONS (other
)->cdr
)
1342 Lisp_Object otherbeg
, otheroverlay
, follower
;
1345 otheroverlay
= XCONS (other
)->car
;
1346 if (! OVERLAY_VALID (otheroverlay
))
1349 otherbeg
= OVERLAY_START (otheroverlay
);
1350 if (OVERLAY_POSITION (otherbeg
) >= where
)
1354 /* Add TAIL to overlays_after before OTHER. */
1355 XCONS (tail
)->cdr
= other
;
1356 if (!NILP (other_prev
))
1357 XCONS (other_prev
)->cdr
= tail
;
1359 buf
->overlays_after
= tail
;
1363 /* We've reached the things that should stay in overlays_before.
1364 All the rest of overlays_before must end even earlier,
1369 /* See if anything in overlays_after should be in overlays_before. */
1371 for (tail
= buf
->overlays_after
;
1373 prev
= tail
, tail
= next
)
1375 next
= XCONS (tail
)->cdr
;
1376 overlay
= XCONS (tail
)->car
;
1378 /* If the overlay is not valid, get rid of it. */
1379 if (!OVERLAY_VALID (overlay
))
1384 /* Splice the cons cell TAIL out of overlays_after. */
1386 XCONS (prev
)->cdr
= next
;
1388 buf
->overlays_after
= next
;
1394 beg
= OVERLAY_START (overlay
);
1395 end
= OVERLAY_END (overlay
);
1397 /* Stop looking, when we know that nothing further
1398 can possibly end before POS. */
1399 if (OVERLAY_POSITION (beg
) > pos
)
1402 if (OVERLAY_POSITION (end
) <= pos
)
1404 /* OVERLAY needs to be moved. */
1405 int where
= OVERLAY_POSITION (end
);
1406 Lisp_Object other
, other_prev
;
1408 /* Splice the cons cell TAIL out of overlays_after. */
1410 XCONS (prev
)->cdr
= next
;
1412 buf
->overlays_after
= next
;
1414 /* Search thru overlays_before for where to put it. */
1416 for (other
= buf
->overlays_before
;
1418 other_prev
= other
, other
= XCONS (other
)->cdr
)
1420 Lisp_Object otherend
, otheroverlay
;
1423 otheroverlay
= XCONS (other
)->car
;
1424 if (! OVERLAY_VALID (otheroverlay
))
1427 otherend
= OVERLAY_END (otheroverlay
);
1428 if (OVERLAY_POSITION (otherend
) <= where
)
1432 /* Add TAIL to overlays_before before OTHER. */
1433 XCONS (tail
)->cdr
= other
;
1434 if (!NILP (other_prev
))
1435 XCONS (other_prev
)->cdr
= tail
;
1437 buf
->overlays_before
= tail
;
1442 XFASTINT (buf
->overlay_center
) = pos
;
1445 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1446 "Return t if OBJECT is an overlay.")
1450 return (OVERLAYP (object
) ? Qt
: Qnil
);
1453 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1454 "Create a new overlay with range BEG to END in BUFFER.\n\
1455 If omitted, BUFFER defaults to the current buffer.\n\
1456 BEG and END may be integers or markers.")
1458 Lisp_Object beg
, end
, buffer
;
1460 Lisp_Object overlay
;
1464 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1465 CHECK_BUFFER (buffer
, 2);
1467 b
= XBUFFER (buffer
);
1471 if (! EQ (Fmarker_buffer (beg
), buffer
))
1472 error ("Marker points into wrong buffer");
1474 beg
= Fcopy_marker (beg
);
1477 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1480 if (! EQ (Fmarker_buffer (end
), buffer
))
1481 error ("Marker points into wrong buffer");
1483 end
= Fcopy_marker (end
);
1486 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1488 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1489 XSETTYPE (overlay
, Lisp_Overlay
);
1491 /* Put the new overlay on the wrong list. */
1492 end
= OVERLAY_END (overlay
);
1493 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1494 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1496 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1498 /* This puts it in the right list, and in the right order. */
1499 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1501 /* We don't need to redisplay the region covered by the overlay, because
1502 the overlay has no properties at the moment. */
1507 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1508 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1509 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.")
1510 (overlay
, beg
, end
, buffer
)
1511 Lisp_Object overlay
, beg
, end
, buffer
;
1515 CHECK_OVERLAY (overlay
, 0);
1517 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1518 CHECK_BUFFER (buffer
, 3);
1519 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1520 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1522 if (XINT (beg
) > XINT (end
))
1524 Lisp_Object temp
= beg
;
1525 beg
= end
; end
= temp
;
1528 b
= XBUFFER (buffer
);
1530 /* Redisplay the area the overlay has just left, or just enclosed. */
1532 Lisp_Object o_beg
= OVERLAY_START (overlay
);
1533 Lisp_Object o_end
= OVERLAY_END (overlay
);
1534 int change_beg
, change_end
;
1536 o_beg
= OVERLAY_POSITION (o_beg
);
1537 o_end
= OVERLAY_POSITION (o_end
);
1539 if (XINT (o_beg
) == XINT (beg
))
1540 redisplay_region (b
, XINT (o_end
), XINT (end
));
1541 else if (XINT (o_end
) == XINT (end
))
1542 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1545 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1546 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1547 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1551 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1552 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1554 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1555 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1557 /* Put the overlay on the wrong list. */
1558 end
= OVERLAY_END (overlay
);
1559 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1560 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1562 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1564 /* This puts it in the right list, and in the right order. */
1565 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1570 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1571 "Delete the overlay OVERLAY from its buffer.")
1573 Lisp_Object overlay
;
1577 CHECK_OVERLAY (overlay
, 0);
1579 b
= XBUFFER (Fmarker_buffer (OVERLAY_START (overlay
)));
1581 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1582 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1584 Fset_marker (OVERLAY_START (overlay
), 1, Qnil
);
1585 Fset_marker (OVERLAY_END (overlay
), 1, Qnil
);
1587 redisplay_region (b
,
1588 OVERLAY_POSITION (OVERLAY_START (overlay
)),
1589 OVERLAY_POSITION (OVERLAY_END (overlay
)));
1594 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1595 "Return a list of the overays that contain position POS.")
1601 Lisp_Object
*overlay_vec
;
1605 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1608 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1610 /* Put all the overlays we want in a vector in overlay_vec.
1611 Store the length in len. */
1612 noverlays
= overlays_at (XINT (pos
), &overlay_vec
, &len
, &endpos
);
1614 /* Make a list of them all. */
1615 result
= Flist (noverlays
, overlay_vec
);
1617 xfree (overlay_vec
);
1621 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1623 "Return the next position after POS where an overlay starts or ends.")
1629 Lisp_Object
*overlay_vec
;
1634 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1637 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1639 /* Put all the overlays we want in a vector in overlay_vec.
1640 Store the length in len.
1641 endpos gets the position where the next overlay starts. */
1642 noverlays
= overlays_at (XINT (pos
), &overlay_vec
, &len
, &endpos
);
1644 /* If any of these overlays ends before endpos,
1645 use its ending point instead. */
1646 for (i
= 0; i
< noverlays
; i
++)
1651 oend
= OVERLAY_END (overlay_vec
[i
]);
1652 oendpos
= OVERLAY_POSITION (oend
);
1653 if (oendpos
< endpos
)
1657 xfree (overlay_vec
);
1658 return make_number (endpos
);
1661 /* These functions are for debugging overlays. */
1663 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1664 "Return a pair of lists giving all the overlays of the current buffer.\n\
1665 The car has all the overlays before the overlay center;\n\
1666 the cdr has all the overlays before the overlay center.\n\
1667 Recentering overlays moves overlays between these lists.\n\
1668 The lists you get are copies, so that changing them has no effect.\n\
1669 However, the overlays you get are the real objects that the buffer uses.")
1672 Lisp_Object before
, after
;
1673 before
= current_buffer
->overlays_before
;
1675 before
= Fcopy_sequence (before
);
1676 after
= current_buffer
->overlays_after
;
1678 after
= Fcopy_sequence (after
);
1680 return Fcons (before
, after
);
1683 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1684 "Recenter the overlays of the current buffer around position POS.")
1688 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1690 recenter_overlay_lists (current_buffer
, XINT (pos
));
1694 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1695 "Get the property of overlay OVERLAY with property name NAME.")
1697 Lisp_Object overlay
, prop
;
1701 CHECK_OVERLAY (overlay
, 0);
1703 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1704 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1705 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1707 if (EQ (XCONS (plist
)->car
, prop
))
1708 return XCONS (XCONS (plist
)->cdr
)->car
;
1714 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1715 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1716 (overlay
, prop
, value
)
1717 Lisp_Object overlay
, prop
, value
;
1719 Lisp_Object plist
, tail
;
1721 CHECK_OVERLAY (overlay
, 0);
1723 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1724 OVERLAY_POSITION (OVERLAY_START (overlay
)),
1725 OVERLAY_POSITION (OVERLAY_END (overlay
)));
1727 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1730 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1731 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1733 if (EQ (XCONS (tail
)->car
, prop
))
1734 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
1737 if (! CONSP (XCONS (overlay
)->cdr
))
1738 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
1740 XCONS (XCONS (overlay
)->cdr
)->cdr
1741 = Fcons (prop
, Fcons (value
, plist
));
1746 /* Somebody has tried to store NEWVAL into the buffer-local slot with
1747 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
1749 buffer_slot_type_mismatch (valcontents
, newval
)
1750 Lisp_Object valcontents
, newval
;
1752 unsigned int offset
= XUINT (valcontents
);
1753 unsigned char *symbol_name
=
1754 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
1758 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
1760 case Lisp_Int
: type_name
= "integers"; break;
1761 case Lisp_String
: type_name
= "strings"; break;
1762 case Lisp_Marker
: type_name
= "markers"; break;
1763 case Lisp_Symbol
: type_name
= "symbols"; break;
1764 case Lisp_Cons
: type_name
= "lists"; break;
1765 case Lisp_Vector
: type_name
= "vectors"; break;
1770 error ("only %s should be stored in the buffer-local variable %s",
1771 type_name
, symbol_name
);
1776 register Lisp_Object tem
;
1778 /* Make sure all markable slots in buffer_defaults
1779 are initialized reasonably, so mark_buffer won't choke. */
1780 reset_buffer (&buffer_defaults
);
1781 reset_buffer (&buffer_local_symbols
);
1782 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
1783 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
1785 /* Set up the default values of various buffer slots. */
1786 /* Must do these before making the first buffer! */
1788 /* real setup is done in loaddefs.el */
1789 buffer_defaults
.mode_line_format
= build_string ("%-");
1790 buffer_defaults
.abbrev_mode
= Qnil
;
1791 buffer_defaults
.overwrite_mode
= Qnil
;
1792 buffer_defaults
.case_fold_search
= Qt
;
1793 buffer_defaults
.auto_fill_function
= Qnil
;
1794 buffer_defaults
.selective_display
= Qnil
;
1796 buffer_defaults
.selective_display_ellipses
= Qt
;
1798 buffer_defaults
.abbrev_table
= Qnil
;
1799 buffer_defaults
.display_table
= Qnil
;
1800 buffer_defaults
.undo_list
= Qnil
;
1801 buffer_defaults
.mark_active
= Qnil
;
1802 buffer_defaults
.overlays_before
= Qnil
;
1803 buffer_defaults
.overlays_after
= Qnil
;
1804 XFASTINT (buffer_defaults
.overlay_center
) = 1;
1806 XFASTINT (buffer_defaults
.tab_width
) = 8;
1807 buffer_defaults
.truncate_lines
= Qnil
;
1808 buffer_defaults
.ctl_arrow
= Qt
;
1810 XFASTINT (buffer_defaults
.fill_column
) = 70;
1811 XFASTINT (buffer_defaults
.left_margin
) = 0;
1813 /* Assign the local-flags to the slots that have default values.
1814 The local flag is a bit that is used in the buffer
1815 to say that it has its own local value for the slot.
1816 The local flag bits are in the local_var_flags slot of the buffer. */
1818 /* Nothing can work if this isn't true */
1819 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
1821 /* 0 means not a lisp var, -1 means always local, else mask */
1822 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
1823 XFASTINT (buffer_local_flags
.filename
) = -1;
1824 XFASTINT (buffer_local_flags
.directory
) = -1;
1825 XFASTINT (buffer_local_flags
.backed_up
) = -1;
1826 XFASTINT (buffer_local_flags
.save_length
) = -1;
1827 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
1828 XFASTINT (buffer_local_flags
.read_only
) = -1;
1829 XFASTINT (buffer_local_flags
.major_mode
) = -1;
1830 XFASTINT (buffer_local_flags
.mode_name
) = -1;
1831 XFASTINT (buffer_local_flags
.undo_list
) = -1;
1832 XFASTINT (buffer_local_flags
.mark_active
) = -1;
1834 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
1835 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
1836 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
1837 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
1838 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
1839 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
1841 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
1843 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
1844 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
1845 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
1846 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
1847 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
1848 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
1849 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
1850 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
1852 Vbuffer_alist
= Qnil
;
1856 QSFundamental
= build_string ("Fundamental");
1858 Qfundamental_mode
= intern ("fundamental-mode");
1859 buffer_defaults
.major_mode
= Qfundamental_mode
;
1861 Qmode_class
= intern ("mode-class");
1863 Qprotected_field
= intern ("protected-field");
1865 Qpermanent_local
= intern ("permanent-local");
1867 Qkill_buffer_hook
= intern ("kill-buffer-hook");
1869 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
1870 /* super-magic invisible buffer */
1871 Vbuffer_alist
= Qnil
;
1873 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1878 char buf
[MAXPATHLEN
+1];
1880 struct stat dotstat
, pwdstat
;
1882 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1884 /* If PWD is accurate, use it instead of calling getwd. This is faster
1885 when PWD is right, and may avoid a fatal error. */
1886 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
1887 && stat (pwd
, &pwdstat
) == 0
1888 && stat (".", &dotstat
) == 0
1889 && dotstat
.st_ino
== pwdstat
.st_ino
1890 && dotstat
.st_dev
== pwdstat
.st_dev
1891 && strlen (pwd
) < MAXPATHLEN
)
1893 else if (getwd (buf
) == 0)
1894 fatal ("`getwd' failed: %s.\n", buf
);
1897 /* Maybe this should really use some standard subroutine
1898 whose definition is filename syntax dependent. */
1899 if (buf
[strlen (buf
) - 1] != '/')
1901 #endif /* not VMS */
1902 current_buffer
->directory
= build_string (buf
);
1905 /* initialize the buffer routines */
1908 extern Lisp_Object Qdisabled
;
1910 staticpro (&Vbuffer_defaults
);
1911 staticpro (&Vbuffer_local_symbols
);
1912 staticpro (&Qfundamental_mode
);
1913 staticpro (&Qmode_class
);
1914 staticpro (&QSFundamental
);
1915 staticpro (&Vbuffer_alist
);
1916 staticpro (&Qprotected_field
);
1917 staticpro (&Qpermanent_local
);
1918 staticpro (&Qkill_buffer_hook
);
1919 staticpro (&Qoverlayp
);
1921 Qoverlayp
= intern ("overlayp");
1923 Fput (Qprotected_field
, Qerror_conditions
,
1924 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
1925 Fput (Qprotected_field
, Qerror_message
,
1926 build_string ("Attempt to modify a protected field"));
1928 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
1930 /* All these use DEFVAR_LISP_NOPRO because the slots in
1931 buffer_defaults will all be marked via Vbuffer_defaults. */
1933 DEFVAR_LISP_NOPRO ("default-mode-line-format",
1934 &buffer_defaults
.mode_line_format
,
1935 "Default value of `mode-line-format' for buffers that don't override it.\n\
1936 This is the same as (default-value 'mode-line-format).");
1938 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
1939 &buffer_defaults
.abbrev_mode
,
1940 "Default value of `abbrev-mode' for buffers that do not override it.\n\
1941 This is the same as (default-value 'abbrev-mode).");
1943 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
1944 &buffer_defaults
.ctl_arrow
,
1945 "Default value of `ctl-arrow' for buffers that do not override it.\n\
1946 This is the same as (default-value 'ctl-arrow).");
1948 DEFVAR_LISP_NOPRO ("default-truncate-lines",
1949 &buffer_defaults
.truncate_lines
,
1950 "Default value of `truncate-lines' for buffers that do not override it.\n\
1951 This is the same as (default-value 'truncate-lines).");
1953 DEFVAR_LISP_NOPRO ("default-fill-column",
1954 &buffer_defaults
.fill_column
,
1955 "Default value of `fill-column' for buffers that do not override it.\n\
1956 This is the same as (default-value 'fill-column).");
1958 DEFVAR_LISP_NOPRO ("default-left-margin",
1959 &buffer_defaults
.left_margin
,
1960 "Default value of `left-margin' for buffers that do not override it.\n\
1961 This is the same as (default-value 'left-margin).");
1963 DEFVAR_LISP_NOPRO ("default-tab-width",
1964 &buffer_defaults
.tab_width
,
1965 "Default value of `tab-width' for buffers that do not override it.\n\
1966 This is the same as (default-value 'tab-width).");
1968 DEFVAR_LISP_NOPRO ("default-case-fold-search",
1969 &buffer_defaults
.case_fold_search
,
1970 "Default value of `case-fold-search' for buffers that don't override it.\n\
1971 This is the same as (default-value 'case-fold-search).");
1973 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
1976 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
1977 But make-docfile finds it!
1978 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
1980 "Template for displaying mode line for current buffer.\n\
1981 Each buffer has its own value of this variable.\n\
1982 Value may be a string, a symbol or a list or cons cell.\n\
1983 For a symbol, its value is used (but it is ignored if t or nil).\n\
1984 A string appearing directly as the value of a symbol is processed verbatim\n\
1985 in that the %-constructs below are not recognized.\n\
1986 For a list whose car is a symbol, the symbol's value is taken,\n\
1987 and if that is non-nil, the cadr of the list is processed recursively.\n\
1988 Otherwise, the caddr of the list (if there is one) is processed.\n\
1989 For a list whose car is a string or list, each element is processed\n\
1990 recursively and the results are effectively concatenated.\n\
1991 For a list whose car is an integer, the cdr of the list is processed\n\
1992 and padded (if the number is positive) or truncated (if negative)\n\
1993 to the width specified by that number.\n\
1994 A string is printed verbatim in the mode line except for %-constructs:\n\
1995 (%-constructs are allowed when the string is the entire mode-line-format\n\
1996 or when it is found in a cons-cell or a list)\n\
1997 %b -- print buffer name. %f -- print visited file name.\n\
1998 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
1999 %s -- print process status. %l -- print the current line number.\n\
2000 %p -- print percent of buffer above top of window, or top, bot or all.\n\
2001 %n -- print Narrow if appropriate.\n\
2002 %[ -- print one [ for each recursive editing level. %] similar.\n\
2003 %% -- print %. %- -- print infinitely many dashes.\n\
2004 Decimal digits after the % specify field width to which to pad.");
2007 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2008 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2009 nil here means use current buffer's major mode.");
2011 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2012 make_number (Lisp_Symbol
),
2013 "Symbol for current buffer's major mode.");
2015 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2016 make_number (Lisp_String
),
2017 "Pretty name of current buffer's major mode (a string).");
2019 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2020 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2021 Automatically becomes buffer-local when set in any fashion.");
2023 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2025 "*Non-nil if searches should ignore case.\n\
2026 Automatically becomes buffer-local when set in any fashion.");
2028 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2029 make_number (Lisp_Int
),
2030 "*Column beyond which automatic line-wrapping should happen.\n\
2031 Automatically becomes buffer-local when set in any fashion.");
2033 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2034 make_number (Lisp_Int
),
2035 "*Column for the default indent-line-function to indent to.\n\
2036 Linefeed indents to this column in Fundamental mode.\n\
2037 Automatically becomes buffer-local when set in any fashion.");
2039 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2040 make_number (Lisp_Int
),
2041 "*Distance between tab stops (for display of tab characters), in columns.\n\
2042 Automatically becomes buffer-local when set in any fashion.");
2044 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2045 "*Non-nil means display control chars with uparrow.\n\
2046 Nil means use backslash and octal digits.\n\
2047 Automatically becomes buffer-local when set in any fashion.\n\
2048 This variable does not apply to characters whose display is specified\n\
2049 in the current display table (if there is one).");
2051 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2052 "*Non-nil means do not display continuation lines;\n\
2053 give each line of text one screen line.\n\
2054 Automatically becomes buffer-local when set in any fashion.\n\
2056 Note that this is overridden by the variable\n\
2057 `truncate-partial-width-windows' if that variable is non-nil\n\
2058 and this buffer is not full-frame width.");
2060 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2061 make_number (Lisp_String
),
2062 "Name of default directory of current buffer. Should end with slash.\n\
2063 Each buffer has its own value of this variable.");
2065 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2067 "Function called (if non-nil) to perform auto-fill.\n\
2068 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2069 Each buffer has its own value of this variable.\n\
2070 NOTE: This variable is not an ordinary hook;\n\
2071 It may not be a list of functions.");
2073 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2074 make_number (Lisp_String
),
2075 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2076 Each buffer has its own value of this variable.");
2078 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2079 ¤t_buffer
->auto_save_file_name
,
2080 make_number (Lisp_String
),
2081 "Name of file for auto-saving current buffer,\n\
2082 or nil if buffer should not be auto-saved.\n\
2083 Each buffer has its own value of this variable.");
2085 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2086 "Non-nil if this buffer is read-only.\n\
2087 Each buffer has its own value of this variable.");
2089 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2090 "Non-nil if this buffer's file has been backed up.\n\
2091 Backing up is done before the first time the file is saved.\n\
2092 Each buffer has its own value of this variable.");
2094 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2095 make_number (Lisp_Int
),
2096 "Length of current buffer when last read in, saved or auto-saved.\n\
2098 Each buffer has its own value of this variable.");
2100 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2102 "Non-nil enables selective display:\n\
2103 Integer N as value means display only lines\n\
2104 that start with less than n columns of space.\n\
2105 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2106 Then ^M's in the file are written into files as newlines.\n\n\
2107 Automatically becomes buffer-local when set in any fashion.");
2110 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2111 ¤t_buffer
->selective_display_ellipses
,
2113 "t means display ... on previous line when a line is invisible.\n\
2114 Automatically becomes buffer-local when set in any fashion.");
2117 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2118 "Non-nil if self-insertion should replace existing text.\n\
2119 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2120 inserts at the end of a line, and inserts when point is before a tab,\n\
2121 until the tab is filled in.\n\
2122 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2123 Automatically becomes buffer-local when set in any fashion.");
2125 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2127 "Display table that controls display of the contents of current buffer.\n\
2128 Automatically becomes buffer-local when set in any fashion.\n\
2129 The display table is a vector created with `make-display-table'.\n\
2130 The first 256 elements control how to display each possible text character.\n\
2131 Each value should be a vector of characters or nil;\n\
2132 nil means display the character in the default fashion.\n\
2133 The remaining five elements control the display of\n\
2134 the end of a truncated screen line (element 256, a single character);\n\
2135 the end of a continued line (element 257, a single character);\n\
2136 the escape character used to display character codes in octal\n\
2137 (element 258, a single character);\n\
2138 the character used as an arrow for control characters (element 259,\n\
2139 a single character);\n\
2140 the decoration indicating the presence of invisible lines (element 260,\n\
2141 a vector of characters).\n\
2142 If this variable is nil, the value of `standard-display-table' is used.\n\
2143 Each window can have its own, overriding display table.");
2145 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2148 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2149 "Function to call before each text change.\n\
2150 Two arguments are passed to the function: the positions of\n\
2151 the beginning and end of the range of old text to be changed.\n\
2152 \(For an insertion, the beginning and end are at the same place.)\n\
2153 No information is given about the length of the text after the change.\n\
2154 position of the change\n\
2156 While executing the `before-change-function', changes to buffers do not\n\
2157 cause calls to any `before-change-function' or `after-change-function'.");
2158 Vbefore_change_function
= Qnil
;
2160 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2161 "Function to call after each text change.\n\
2162 Three arguments are passed to the function: the positions of\n\
2163 the beginning and end of the range of changed text,\n\
2164 and the length of the pre-change text replaced by that range.\n\
2165 \(For an insertion, the pre-change length is zero;\n\
2166 for a deletion, that length is the number of characters deleted,\n\
2167 and the post-change beginning and end are at the same place.)\n\
2169 While executing the `after-change-function', changes to buffers do not\n\
2170 cause calls to any `before-change-function' or `after-change-function'.");
2171 Vafter_change_function
= Qnil
;
2173 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2174 "A list of functions to call before changing a buffer which is unmodified.\n\
2175 The functions are run using the `run-hooks' function.");
2176 Vfirst_change_hook
= Qnil
;
2177 Qfirst_change_hook
= intern ("first-change-hook");
2178 staticpro (&Qfirst_change_hook
);
2180 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2181 "List of undo entries in current buffer.\n\
2182 Recent changes come first; older changes follow newer.\n\
2184 An entry (START . END) represents an insertion which begins at\n\
2185 position START and ends at position END.\n\
2187 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2188 from (abs POSITION). If POSITION is positive, point was at the front\n\
2189 of the text being deleted; if negative, point was at the end.\n\
2191 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2192 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2193 16-bit words of the buffer's modification count at the time. If the\n\
2194 modification count of the most recent save is different, this entry is\n\
2197 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2198 was modified between BEG and END. PROP is the property name,\n\
2199 and VAL is the old value.\n\
2201 An entry of the form POSITION indicates that point was at the buffer\n\
2202 location given by the integer. Undoing an entry of this form places\n\
2203 point at POSITION.\n\
2205 nil marks undo boundaries. The undo command treats the changes\n\
2206 between two undo boundaries as a single step to be undone.\n\
2208 If the value of the variable is t, undo information is not recorded.");
2210 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2211 "Non-nil means the mark and region are currently active in this buffer.\n\
2212 Automatically local in all buffers.");
2214 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2215 "*Non-nil means deactivate the mark when the buffer contents change.");
2216 Vtransient_mark_mode
= Qnil
;
2218 defsubr (&Sbuffer_list
);
2219 defsubr (&Sget_buffer
);
2220 defsubr (&Sget_file_buffer
);
2221 defsubr (&Sget_buffer_create
);
2222 defsubr (&Sgenerate_new_buffer_name
);
2223 defsubr (&Sbuffer_name
);
2224 /*defsubr (&Sbuffer_number);*/
2225 defsubr (&Sbuffer_file_name
);
2226 defsubr (&Sbuffer_local_variables
);
2227 defsubr (&Sbuffer_modified_p
);
2228 defsubr (&Sset_buffer_modified_p
);
2229 defsubr (&Sbuffer_modified_tick
);
2230 defsubr (&Srename_buffer
);
2231 defsubr (&Sother_buffer
);
2232 defsubr (&Sbuffer_disable_undo
);
2233 defsubr (&Sbuffer_enable_undo
);
2234 defsubr (&Skill_buffer
);
2235 defsubr (&Serase_buffer
);
2236 defsubr (&Sswitch_to_buffer
);
2237 defsubr (&Spop_to_buffer
);
2238 defsubr (&Scurrent_buffer
);
2239 defsubr (&Sset_buffer
);
2240 defsubr (&Sbarf_if_buffer_read_only
);
2241 defsubr (&Sbury_buffer
);
2242 defsubr (&Slist_buffers
);
2243 defsubr (&Skill_all_local_variables
);
2245 defsubr (&Soverlayp
);
2246 defsubr (&Smake_overlay
);
2247 defsubr (&Sdelete_overlay
);
2248 defsubr (&Smove_overlay
);
2249 defsubr (&Soverlays_at
);
2250 defsubr (&Snext_overlay_change
);
2251 defsubr (&Soverlay_recenter
);
2252 defsubr (&Soverlay_lists
);
2253 defsubr (&Soverlay_get
);
2254 defsubr (&Soverlay_put
);
2259 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2260 initial_define_key (control_x_map
, 'k', "kill-buffer");
2261 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");