1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
24 #include <sys/param.h>
27 /* in 4.1, param.h fails to define this. */
28 #define MAXPATHLEN 1024
29 #endif /* not MAXPATHLEN */
33 #include "intervals.h"
39 #include "blockinput.h"
41 struct buffer
*current_buffer
; /* the current buffer */
43 /* First buffer in chain of all buffers (in reverse order of creation).
44 Threaded through ->next. */
46 struct buffer
*all_buffers
;
48 /* This structure holds the default values of the buffer-local variables
49 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
50 The default value occupies the same slot in this structure
51 as an individual buffer's value occupies in that buffer.
52 Setting the default value also goes through the alist of buffers
53 and stores into each buffer that does not say it has a local value. */
55 struct buffer buffer_defaults
;
57 /* A Lisp_Object pointer to the above, used for staticpro */
59 static Lisp_Object Vbuffer_defaults
;
61 /* This structure marks which slots in a buffer have corresponding
62 default values in buffer_defaults.
63 Each such slot has a nonzero value in this structure.
64 The value has only one nonzero bit.
66 When a buffer has its own local value for a slot,
67 the bit for that slot (found in the same slot in this structure)
68 is turned on in the buffer's local_var_flags slot.
70 If a slot in this structure is -1, then even though there may
71 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
72 and the corresponding slot in buffer_defaults is not used.
74 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
75 but there is a default value which is copied into each buffer.
77 If a slot in this structure is negative, then even though there may
78 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
79 and the corresponding slot in buffer_defaults is not used.
81 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
82 zero, that is a bug */
84 struct buffer buffer_local_flags
;
86 /* This structure holds the names of symbols whose values may be
87 buffer-local. It is indexed and accessed in the same way as the above. */
89 struct buffer buffer_local_symbols
;
90 /* A Lisp_Object pointer to the above, used for staticpro */
91 static Lisp_Object Vbuffer_local_symbols
;
93 /* This structure holds the required types for the values in the
94 buffer-local slots. If a slot contains Qnil, then the
95 corresponding buffer slot may contain a value of any type. If a
96 slot contains an integer, then prospective values' tags must be
97 equal to that integer. When a tag does not match, the function
98 buffer_slot_type_mismatch will signal an error. */
99 struct buffer buffer_local_types
;
101 Lisp_Object
Fset_buffer ();
102 void set_buffer_internal ();
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.
1207 If EXTEND is non-zero, we make the vector bigger if necessary.
1208 If EXTEND is zero, we never extend the vector,
1209 and we store only as many overlays as will fit.
1210 But we still return the total number of overlays. */
1213 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1216 Lisp_Object
**vec_ptr
;
1220 Lisp_Object tail
, overlay
, start
, end
, result
;
1223 Lisp_Object
*vec
= *vec_ptr
;
1225 int inhibit_storing
= 0;
1227 for (tail
= current_buffer
->overlays_before
;
1229 tail
= XCONS (tail
)->cdr
)
1233 overlay
= XCONS (tail
)->car
;
1234 if (! OVERLAY_VALID (overlay
))
1237 start
= OVERLAY_START (overlay
);
1238 end
= OVERLAY_END (overlay
);
1239 if (OVERLAY_POSITION (end
) <= pos
)
1241 startpos
= OVERLAY_POSITION (start
);
1242 if (startpos
<= pos
)
1246 /* The supplied vector is full.
1247 Either make it bigger, or don't store any more in it. */
1250 *len_ptr
= len
*= 2;
1251 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1255 inhibit_storing
= 1;
1258 if (!inhibit_storing
)
1260 /* Keep counting overlays even if we can't return them all. */
1263 else if (startpos
< next
)
1267 for (tail
= current_buffer
->overlays_after
;
1269 tail
= XCONS (tail
)->cdr
)
1273 overlay
= XCONS (tail
)->car
;
1274 if (! OVERLAY_VALID (overlay
))
1277 start
= OVERLAY_START (overlay
);
1278 end
= OVERLAY_END (overlay
);
1279 startpos
= OVERLAY_POSITION (start
);
1282 if (startpos
< next
)
1286 if (pos
< OVERLAY_POSITION (end
))
1292 *len_ptr
= len
*= 2;
1293 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1297 inhibit_storing
= 1;
1300 if (!inhibit_storing
)
1310 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1313 recenter_overlay_lists (buf
, pos
)
1317 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1319 /* See if anything in overlays_before should move to overlays_after. */
1321 /* We don't strictly need prev in this loop; it should always be nil.
1322 But we use it for symmetry and in case that should cease to be true
1323 with some future change. */
1325 for (tail
= buf
->overlays_before
;
1327 prev
= tail
, tail
= next
)
1329 next
= XCONS (tail
)->cdr
;
1330 overlay
= XCONS (tail
)->car
;
1332 /* If the overlay is not valid, get rid of it. */
1333 if (!OVERLAY_VALID (overlay
))
1338 /* Splice the cons cell TAIL out of overlays_before. */
1340 XCONS (prev
)->cdr
= next
;
1342 buf
->overlays_before
= next
;
1348 beg
= OVERLAY_START (overlay
);
1349 end
= OVERLAY_END (overlay
);
1351 if (OVERLAY_POSITION (end
) > pos
)
1353 /* OVERLAY needs to be moved. */
1354 int where
= OVERLAY_POSITION (beg
);
1355 Lisp_Object other
, other_prev
;
1357 /* Splice the cons cell TAIL out of overlays_before. */
1359 XCONS (prev
)->cdr
= next
;
1361 buf
->overlays_before
= next
;
1363 /* Search thru overlays_after for where to put it. */
1365 for (other
= buf
->overlays_after
;
1367 other_prev
= other
, other
= XCONS (other
)->cdr
)
1369 Lisp_Object otherbeg
, otheroverlay
, follower
;
1372 otheroverlay
= XCONS (other
)->car
;
1373 if (! OVERLAY_VALID (otheroverlay
))
1376 otherbeg
= OVERLAY_START (otheroverlay
);
1377 if (OVERLAY_POSITION (otherbeg
) >= where
)
1381 /* Add TAIL to overlays_after before OTHER. */
1382 XCONS (tail
)->cdr
= other
;
1383 if (!NILP (other_prev
))
1384 XCONS (other_prev
)->cdr
= tail
;
1386 buf
->overlays_after
= tail
;
1390 /* We've reached the things that should stay in overlays_before.
1391 All the rest of overlays_before must end even earlier,
1396 /* See if anything in overlays_after should be in overlays_before. */
1398 for (tail
= buf
->overlays_after
;
1400 prev
= tail
, tail
= next
)
1402 next
= XCONS (tail
)->cdr
;
1403 overlay
= XCONS (tail
)->car
;
1405 /* If the overlay is not valid, get rid of it. */
1406 if (!OVERLAY_VALID (overlay
))
1411 /* Splice the cons cell TAIL out of overlays_after. */
1413 XCONS (prev
)->cdr
= next
;
1415 buf
->overlays_after
= next
;
1421 beg
= OVERLAY_START (overlay
);
1422 end
= OVERLAY_END (overlay
);
1424 /* Stop looking, when we know that nothing further
1425 can possibly end before POS. */
1426 if (OVERLAY_POSITION (beg
) > pos
)
1429 if (OVERLAY_POSITION (end
) <= pos
)
1431 /* OVERLAY needs to be moved. */
1432 int where
= OVERLAY_POSITION (end
);
1433 Lisp_Object other
, other_prev
;
1435 /* Splice the cons cell TAIL out of overlays_after. */
1437 XCONS (prev
)->cdr
= next
;
1439 buf
->overlays_after
= next
;
1441 /* Search thru overlays_before for where to put it. */
1443 for (other
= buf
->overlays_before
;
1445 other_prev
= other
, other
= XCONS (other
)->cdr
)
1447 Lisp_Object otherend
, otheroverlay
;
1450 otheroverlay
= XCONS (other
)->car
;
1451 if (! OVERLAY_VALID (otheroverlay
))
1454 otherend
= OVERLAY_END (otheroverlay
);
1455 if (OVERLAY_POSITION (otherend
) <= where
)
1459 /* Add TAIL to overlays_before before OTHER. */
1460 XCONS (tail
)->cdr
= other
;
1461 if (!NILP (other_prev
))
1462 XCONS (other_prev
)->cdr
= tail
;
1464 buf
->overlays_before
= tail
;
1469 XFASTINT (buf
->overlay_center
) = pos
;
1472 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1473 "Return t if OBJECT is an overlay.")
1477 return (OVERLAYP (object
) ? Qt
: Qnil
);
1480 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1481 "Create a new overlay with range BEG to END in BUFFER.\n\
1482 If omitted, BUFFER defaults to the current buffer.\n\
1483 BEG and END may be integers or markers.")
1485 Lisp_Object beg
, end
, buffer
;
1487 Lisp_Object overlay
;
1491 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1493 CHECK_BUFFER (buffer
, 2);
1495 && ! EQ (Fmarker_buffer (beg
), buffer
))
1496 error ("Marker points into wrong buffer");
1498 && ! EQ (Fmarker_buffer (end
), buffer
))
1499 error ("Marker points into wrong buffer");
1501 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1502 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1504 if (XINT (beg
) > XINT (end
))
1506 Lisp_Object temp
= beg
;
1507 beg
= end
; end
= temp
;
1510 b
= XBUFFER (buffer
);
1512 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1513 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1515 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1516 XSETTYPE (overlay
, Lisp_Overlay
);
1518 /* Put the new overlay on the wrong list. */
1519 end
= OVERLAY_END (overlay
);
1520 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1521 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1523 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1525 /* This puts it in the right list, and in the right order. */
1526 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1528 /* We don't need to redisplay the region covered by the overlay, because
1529 the overlay has no properties at the moment. */
1534 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1535 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1536 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1537 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1539 (overlay
, beg
, end
, buffer
)
1540 Lisp_Object overlay
, beg
, end
, buffer
;
1544 CHECK_OVERLAY (overlay
, 0);
1546 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1548 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1549 CHECK_BUFFER (buffer
, 3);
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 /* Redisplay the area the overlay has just left, or just enclosed. */
1571 Lisp_Object o_beg
= OVERLAY_START (overlay
);
1572 Lisp_Object o_end
= OVERLAY_END (overlay
);
1573 int change_beg
, change_end
;
1575 o_beg
= OVERLAY_POSITION (o_beg
);
1576 o_end
= OVERLAY_POSITION (o_end
);
1578 if (XINT (o_beg
) == XINT (beg
))
1579 redisplay_region (b
, XINT (o_end
), XINT (end
));
1580 else if (XINT (o_end
) == XINT (end
))
1581 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1584 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1585 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1586 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1590 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1591 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1593 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1594 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1596 /* Put the overlay on the wrong list. */
1597 end
= OVERLAY_END (overlay
);
1598 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1599 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1601 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1603 /* This puts it in the right list, and in the right order. */
1604 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1609 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1610 "Delete the overlay OVERLAY from its buffer.")
1612 Lisp_Object overlay
;
1616 CHECK_OVERLAY (overlay
, 0);
1618 b
= XBUFFER (Fmarker_buffer (OVERLAY_START (overlay
)));
1620 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1621 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1623 redisplay_region (b
,
1624 OVERLAY_POSITION (OVERLAY_START (overlay
)),
1625 OVERLAY_POSITION (OVERLAY_END (overlay
)));
1627 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1628 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1633 /* Overlay dissection functions. */
1635 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1636 "Return the position at which OVERLAY starts.")
1638 Lisp_Object overlay
;
1640 CHECK_OVERLAY (overlay
, 0);
1642 return (Fmarker_position (OVERLAY_START (overlay
)));
1645 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1646 "Return the position at which OVERLAY ends.")
1648 Lisp_Object overlay
;
1650 CHECK_OVERLAY (overlay
, 0);
1652 return (Fmarker_position (OVERLAY_END (overlay
)));
1655 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1656 "Return the buffer OVERLAY belongs to.")
1658 Lisp_Object overlay
;
1660 CHECK_OVERLAY (overlay
, 0);
1662 return Fmarker_buffer (OVERLAY_START (overlay
));
1665 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1666 "Return a list of the properties on OVERLAY.\n\
1667 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1670 Lisp_Object overlay
;
1672 CHECK_OVERLAY (overlay
, 0);
1674 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1678 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1679 "Return a list of the overays that contain position POS.")
1685 Lisp_Object
*overlay_vec
;
1689 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1692 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1694 /* Put all the overlays we want in a vector in overlay_vec.
1695 Store the length in len. */
1696 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1698 /* Make a list of them all. */
1699 result
= Flist (noverlays
, overlay_vec
);
1701 xfree (overlay_vec
);
1705 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
1707 "Return the next position after POS where an overlay starts or ends.")
1713 Lisp_Object
*overlay_vec
;
1718 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1721 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
1723 /* Put all the overlays we want in a vector in overlay_vec.
1724 Store the length in len.
1725 endpos gets the position where the next overlay starts. */
1726 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
1728 /* If any of these overlays ends before endpos,
1729 use its ending point instead. */
1730 for (i
= 0; i
< noverlays
; i
++)
1735 oend
= OVERLAY_END (overlay_vec
[i
]);
1736 oendpos
= OVERLAY_POSITION (oend
);
1737 if (oendpos
< endpos
)
1741 xfree (overlay_vec
);
1742 return make_number (endpos
);
1745 /* These functions are for debugging overlays. */
1747 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
1748 "Return a pair of lists giving all the overlays of the current buffer.\n\
1749 The car has all the overlays before the overlay center;\n\
1750 the cdr has all the overlays before the overlay center.\n\
1751 Recentering overlays moves overlays between these lists.\n\
1752 The lists you get are copies, so that changing them has no effect.\n\
1753 However, the overlays you get are the real objects that the buffer uses.")
1756 Lisp_Object before
, after
;
1757 before
= current_buffer
->overlays_before
;
1759 before
= Fcopy_sequence (before
);
1760 after
= current_buffer
->overlays_after
;
1762 after
= Fcopy_sequence (after
);
1764 return Fcons (before
, after
);
1767 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
1768 "Recenter the overlays of the current buffer around position POS.")
1772 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
1774 recenter_overlay_lists (current_buffer
, XINT (pos
));
1778 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
1779 "Get the property of overlay OVERLAY with property name NAME.")
1781 Lisp_Object overlay
, prop
;
1785 CHECK_OVERLAY (overlay
, 0);
1787 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1788 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
1789 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
1791 if (EQ (XCONS (plist
)->car
, prop
))
1792 return XCONS (XCONS (plist
)->cdr
)->car
;
1798 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
1799 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
1800 (overlay
, prop
, value
)
1801 Lisp_Object overlay
, prop
, value
;
1803 Lisp_Object plist
, tail
;
1805 CHECK_OVERLAY (overlay
, 0);
1807 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
1808 OVERLAY_POSITION (OVERLAY_START (overlay
)),
1809 OVERLAY_POSITION (OVERLAY_END (overlay
)));
1811 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
1814 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
1815 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
1817 if (EQ (XCONS (tail
)->car
, prop
))
1818 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
1821 if (! CONSP (XCONS (overlay
)->cdr
))
1822 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
1824 XCONS (XCONS (overlay
)->cdr
)->cdr
1825 = Fcons (prop
, Fcons (value
, plist
));
1830 /* Somebody has tried to store NEWVAL into the buffer-local slot with
1831 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
1833 buffer_slot_type_mismatch (valcontents
, newval
)
1834 Lisp_Object valcontents
, newval
;
1836 unsigned int offset
= XUINT (valcontents
);
1837 unsigned char *symbol_name
=
1838 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
1842 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
1844 case Lisp_Int
: type_name
= "integers"; break;
1845 case Lisp_String
: type_name
= "strings"; break;
1846 case Lisp_Marker
: type_name
= "markers"; break;
1847 case Lisp_Symbol
: type_name
= "symbols"; break;
1848 case Lisp_Cons
: type_name
= "lists"; break;
1849 case Lisp_Vector
: type_name
= "vectors"; break;
1854 error ("only %s should be stored in the buffer-local variable %s",
1855 type_name
, symbol_name
);
1860 register Lisp_Object tem
;
1862 /* Make sure all markable slots in buffer_defaults
1863 are initialized reasonably, so mark_buffer won't choke. */
1864 reset_buffer (&buffer_defaults
);
1865 reset_buffer (&buffer_local_symbols
);
1866 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
1867 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
1869 /* Set up the default values of various buffer slots. */
1870 /* Must do these before making the first buffer! */
1872 /* real setup is done in loaddefs.el */
1873 buffer_defaults
.mode_line_format
= build_string ("%-");
1874 buffer_defaults
.abbrev_mode
= Qnil
;
1875 buffer_defaults
.overwrite_mode
= Qnil
;
1876 buffer_defaults
.case_fold_search
= Qt
;
1877 buffer_defaults
.auto_fill_function
= Qnil
;
1878 buffer_defaults
.selective_display
= Qnil
;
1880 buffer_defaults
.selective_display_ellipses
= Qt
;
1882 buffer_defaults
.abbrev_table
= Qnil
;
1883 buffer_defaults
.display_table
= Qnil
;
1884 buffer_defaults
.undo_list
= Qnil
;
1885 buffer_defaults
.mark_active
= Qnil
;
1886 buffer_defaults
.overlays_before
= Qnil
;
1887 buffer_defaults
.overlays_after
= Qnil
;
1888 XFASTINT (buffer_defaults
.overlay_center
) = 1;
1890 XFASTINT (buffer_defaults
.tab_width
) = 8;
1891 buffer_defaults
.truncate_lines
= Qnil
;
1892 buffer_defaults
.ctl_arrow
= Qt
;
1894 XFASTINT (buffer_defaults
.fill_column
) = 70;
1895 XFASTINT (buffer_defaults
.left_margin
) = 0;
1897 /* Assign the local-flags to the slots that have default values.
1898 The local flag is a bit that is used in the buffer
1899 to say that it has its own local value for the slot.
1900 The local flag bits are in the local_var_flags slot of the buffer. */
1902 /* Nothing can work if this isn't true */
1903 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
1905 /* 0 means not a lisp var, -1 means always local, else mask */
1906 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
1907 XFASTINT (buffer_local_flags
.filename
) = -1;
1908 XFASTINT (buffer_local_flags
.directory
) = -1;
1909 XFASTINT (buffer_local_flags
.backed_up
) = -1;
1910 XFASTINT (buffer_local_flags
.save_length
) = -1;
1911 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
1912 XFASTINT (buffer_local_flags
.read_only
) = -1;
1913 XFASTINT (buffer_local_flags
.major_mode
) = -1;
1914 XFASTINT (buffer_local_flags
.mode_name
) = -1;
1915 XFASTINT (buffer_local_flags
.undo_list
) = -1;
1916 XFASTINT (buffer_local_flags
.mark_active
) = -1;
1918 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
1919 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
1920 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
1921 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
1922 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
1923 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
1925 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
1927 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
1928 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
1929 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
1930 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
1931 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
1932 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
1933 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
1934 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
1936 Vbuffer_alist
= Qnil
;
1940 QSFundamental
= build_string ("Fundamental");
1942 Qfundamental_mode
= intern ("fundamental-mode");
1943 buffer_defaults
.major_mode
= Qfundamental_mode
;
1945 Qmode_class
= intern ("mode-class");
1947 Qprotected_field
= intern ("protected-field");
1949 Qpermanent_local
= intern ("permanent-local");
1951 Qkill_buffer_hook
= intern ("kill-buffer-hook");
1953 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
1954 /* super-magic invisible buffer */
1955 Vbuffer_alist
= Qnil
;
1957 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1962 char buf
[MAXPATHLEN
+1];
1964 struct stat dotstat
, pwdstat
;
1966 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
1968 /* If PWD is accurate, use it instead of calling getwd. This is faster
1969 when PWD is right, and may avoid a fatal error. */
1970 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
1971 && stat (pwd
, &pwdstat
) == 0
1972 && stat (".", &dotstat
) == 0
1973 && dotstat
.st_ino
== pwdstat
.st_ino
1974 && dotstat
.st_dev
== pwdstat
.st_dev
1975 && strlen (pwd
) < MAXPATHLEN
)
1977 else if (getwd (buf
) == 0)
1978 fatal ("`getwd' failed: %s.\n", buf
);
1981 /* Maybe this should really use some standard subroutine
1982 whose definition is filename syntax dependent. */
1983 if (buf
[strlen (buf
) - 1] != '/')
1985 #endif /* not VMS */
1986 current_buffer
->directory
= build_string (buf
);
1989 /* initialize the buffer routines */
1992 extern Lisp_Object Qdisabled
;
1994 staticpro (&Vbuffer_defaults
);
1995 staticpro (&Vbuffer_local_symbols
);
1996 staticpro (&Qfundamental_mode
);
1997 staticpro (&Qmode_class
);
1998 staticpro (&QSFundamental
);
1999 staticpro (&Vbuffer_alist
);
2000 staticpro (&Qprotected_field
);
2001 staticpro (&Qpermanent_local
);
2002 staticpro (&Qkill_buffer_hook
);
2003 staticpro (&Qoverlayp
);
2005 Qoverlayp
= intern ("overlayp");
2007 Fput (Qprotected_field
, Qerror_conditions
,
2008 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2009 Fput (Qprotected_field
, Qerror_message
,
2010 build_string ("Attempt to modify a protected field"));
2012 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
2014 /* All these use DEFVAR_LISP_NOPRO because the slots in
2015 buffer_defaults will all be marked via Vbuffer_defaults. */
2017 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2018 &buffer_defaults
.mode_line_format
,
2019 "Default value of `mode-line-format' for buffers that don't override it.\n\
2020 This is the same as (default-value 'mode-line-format).");
2022 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2023 &buffer_defaults
.abbrev_mode
,
2024 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2025 This is the same as (default-value 'abbrev-mode).");
2027 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2028 &buffer_defaults
.ctl_arrow
,
2029 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2030 This is the same as (default-value 'ctl-arrow).");
2032 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2033 &buffer_defaults
.truncate_lines
,
2034 "Default value of `truncate-lines' for buffers that do not override it.\n\
2035 This is the same as (default-value 'truncate-lines).");
2037 DEFVAR_LISP_NOPRO ("default-fill-column",
2038 &buffer_defaults
.fill_column
,
2039 "Default value of `fill-column' for buffers that do not override it.\n\
2040 This is the same as (default-value 'fill-column).");
2042 DEFVAR_LISP_NOPRO ("default-left-margin",
2043 &buffer_defaults
.left_margin
,
2044 "Default value of `left-margin' for buffers that do not override it.\n\
2045 This is the same as (default-value 'left-margin).");
2047 DEFVAR_LISP_NOPRO ("default-tab-width",
2048 &buffer_defaults
.tab_width
,
2049 "Default value of `tab-width' for buffers that do not override it.\n\
2050 This is the same as (default-value 'tab-width).");
2052 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2053 &buffer_defaults
.case_fold_search
,
2054 "Default value of `case-fold-search' for buffers that don't override it.\n\
2055 This is the same as (default-value 'case-fold-search).");
2057 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2060 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2061 But make-docfile finds it!
2062 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2064 "Template for displaying mode line for current buffer.\n\
2065 Each buffer has its own value of this variable.\n\
2066 Value may be a string, a symbol or a list or cons cell.\n\
2067 For a symbol, its value is used (but it is ignored if t or nil).\n\
2068 A string appearing directly as the value of a symbol is processed verbatim\n\
2069 in that the %-constructs below are not recognized.\n\
2070 For a list whose car is a symbol, the symbol's value is taken,\n\
2071 and if that is non-nil, the cadr of the list is processed recursively.\n\
2072 Otherwise, the caddr of the list (if there is one) is processed.\n\
2073 For a list whose car is a string or list, each element is processed\n\
2074 recursively and the results are effectively concatenated.\n\
2075 For a list whose car is an integer, the cdr of the list is processed\n\
2076 and padded (if the number is positive) or truncated (if negative)\n\
2077 to the width specified by that number.\n\
2078 A string is printed verbatim in the mode line except for %-constructs:\n\
2079 (%-constructs are allowed when the string is the entire mode-line-format\n\
2080 or when it is found in a cons-cell or a list)\n\
2081 %b -- print buffer name. %f -- print visited file name.\n\
2082 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2083 %s -- print process status. %l -- print the current line number.\n\
2084 %p -- print percent of buffer above top of window, or top, bot or all.\n\
2085 %n -- print Narrow if appropriate.\n\
2086 %[ -- print one [ for each recursive editing level. %] similar.\n\
2087 %% -- print %. %- -- print infinitely many dashes.\n\
2088 Decimal digits after the % specify field width to which to pad.");
2091 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2092 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2093 nil here means use current buffer's major mode.");
2095 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2096 make_number (Lisp_Symbol
),
2097 "Symbol for current buffer's major mode.");
2099 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2100 make_number (Lisp_String
),
2101 "Pretty name of current buffer's major mode (a string).");
2103 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2104 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2105 Automatically becomes buffer-local when set in any fashion.");
2107 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2109 "*Non-nil if searches should ignore case.\n\
2110 Automatically becomes buffer-local when set in any fashion.");
2112 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2113 make_number (Lisp_Int
),
2114 "*Column beyond which automatic line-wrapping should happen.\n\
2115 Automatically becomes buffer-local when set in any fashion.");
2117 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2118 make_number (Lisp_Int
),
2119 "*Column for the default indent-line-function to indent to.\n\
2120 Linefeed indents to this column in Fundamental mode.\n\
2121 Automatically becomes buffer-local when set in any fashion.");
2123 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2124 make_number (Lisp_Int
),
2125 "*Distance between tab stops (for display of tab characters), in columns.\n\
2126 Automatically becomes buffer-local when set in any fashion.");
2128 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2129 "*Non-nil means display control chars with uparrow.\n\
2130 Nil means use backslash and octal digits.\n\
2131 Automatically becomes buffer-local when set in any fashion.\n\
2132 This variable does not apply to characters whose display is specified\n\
2133 in the current display table (if there is one).");
2135 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2136 "*Non-nil means do not display continuation lines;\n\
2137 give each line of text one screen line.\n\
2138 Automatically becomes buffer-local when set in any fashion.\n\
2140 Note that this is overridden by the variable\n\
2141 `truncate-partial-width-windows' if that variable is non-nil\n\
2142 and this buffer is not full-frame width.");
2144 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2145 make_number (Lisp_String
),
2146 "Name of default directory of current buffer. Should end with slash.\n\
2147 Each buffer has its own value of this variable.");
2149 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2151 "Function called (if non-nil) to perform auto-fill.\n\
2152 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2153 Each buffer has its own value of this variable.\n\
2154 NOTE: This variable is not an ordinary hook;\n\
2155 It may not be a list of functions.");
2157 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2158 make_number (Lisp_String
),
2159 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2160 Each buffer has its own value of this variable.");
2162 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2163 ¤t_buffer
->auto_save_file_name
,
2164 make_number (Lisp_String
),
2165 "Name of file for auto-saving current buffer,\n\
2166 or nil if buffer should not be auto-saved.\n\
2167 Each buffer has its own value of this variable.");
2169 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2170 "Non-nil if this buffer is read-only.\n\
2171 Each buffer has its own value of this variable.");
2173 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2174 "Non-nil if this buffer's file has been backed up.\n\
2175 Backing up is done before the first time the file is saved.\n\
2176 Each buffer has its own value of this variable.");
2178 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2179 make_number (Lisp_Int
),
2180 "Length of current buffer when last read in, saved or auto-saved.\n\
2182 Each buffer has its own value of this variable.");
2184 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2186 "Non-nil enables selective display:\n\
2187 Integer N as value means display only lines\n\
2188 that start with less than n columns of space.\n\
2189 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2190 Then ^M's in the file are written into files as newlines.\n\n\
2191 Automatically becomes buffer-local when set in any fashion.");
2194 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2195 ¤t_buffer
->selective_display_ellipses
,
2197 "t means display ... on previous line when a line is invisible.\n\
2198 Automatically becomes buffer-local when set in any fashion.");
2201 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2202 "Non-nil if self-insertion should replace existing text.\n\
2203 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2204 inserts at the end of a line, and inserts when point is before a tab,\n\
2205 until the tab is filled in.\n\
2206 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2207 Automatically becomes buffer-local when set in any fashion.");
2209 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2211 "Display table that controls display of the contents of current buffer.\n\
2212 Automatically becomes buffer-local when set in any fashion.\n\
2213 The display table is a vector created with `make-display-table'.\n\
2214 The first 256 elements control how to display each possible text character.\n\
2215 Each value should be a vector of characters or nil;\n\
2216 nil means display the character in the default fashion.\n\
2217 The remaining five elements control the display of\n\
2218 the end of a truncated screen line (element 256, a single character);\n\
2219 the end of a continued line (element 257, a single character);\n\
2220 the escape character used to display character codes in octal\n\
2221 (element 258, a single character);\n\
2222 the character used as an arrow for control characters (element 259,\n\
2223 a single character);\n\
2224 the decoration indicating the presence of invisible lines (element 260,\n\
2225 a vector of characters).\n\
2226 If this variable is nil, the value of `standard-display-table' is used.\n\
2227 Each window can have its own, overriding display table.");
2229 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2232 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2233 "Function to call before each text change.\n\
2234 Two arguments are passed to the function: the positions of\n\
2235 the beginning and end of the range of old text to be changed.\n\
2236 \(For an insertion, the beginning and end are at the same place.)\n\
2237 No information is given about the length of the text after the change.\n\
2238 position of the change\n\
2240 While executing the `before-change-function', changes to buffers do not\n\
2241 cause calls to any `before-change-function' or `after-change-function'.");
2242 Vbefore_change_function
= Qnil
;
2244 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2245 "Function to call after each text change.\n\
2246 Three arguments are passed to the function: the positions of\n\
2247 the beginning and end of the range of changed text,\n\
2248 and the length of the pre-change text replaced by that range.\n\
2249 \(For an insertion, the pre-change length is zero;\n\
2250 for a deletion, that length is the number of characters deleted,\n\
2251 and the post-change beginning and end are at the same place.)\n\
2253 While executing the `after-change-function', changes to buffers do not\n\
2254 cause calls to any `before-change-function' or `after-change-function'.");
2255 Vafter_change_function
= Qnil
;
2257 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2258 "A list of functions to call before changing a buffer which is unmodified.\n\
2259 The functions are run using the `run-hooks' function.");
2260 Vfirst_change_hook
= Qnil
;
2261 Qfirst_change_hook
= intern ("first-change-hook");
2262 staticpro (&Qfirst_change_hook
);
2264 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2265 "List of undo entries in current buffer.\n\
2266 Recent changes come first; older changes follow newer.\n\
2268 An entry (START . END) represents an insertion which begins at\n\
2269 position START and ends at position END.\n\
2271 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2272 from (abs POSITION). If POSITION is positive, point was at the front\n\
2273 of the text being deleted; if negative, point was at the end.\n\
2275 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2276 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2277 16-bit words of the buffer's modification count at the time. If the\n\
2278 modification count of the most recent save is different, this entry is\n\
2281 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2282 was modified between BEG and END. PROP is the property name,\n\
2283 and VAL is the old value.\n\
2285 An entry of the form POSITION indicates that point was at the buffer\n\
2286 location given by the integer. Undoing an entry of this form places\n\
2287 point at POSITION.\n\
2289 nil marks undo boundaries. The undo command treats the changes\n\
2290 between two undo boundaries as a single step to be undone.\n\
2292 If the value of the variable is t, undo information is not recorded.");
2294 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2295 "Non-nil means the mark and region are currently active in this buffer.\n\
2296 Automatically local in all buffers.");
2298 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2299 "*Non-nil means deactivate the mark when the buffer contents change.");
2300 Vtransient_mark_mode
= Qnil
;
2302 defsubr (&Sbuffer_list
);
2303 defsubr (&Sget_buffer
);
2304 defsubr (&Sget_file_buffer
);
2305 defsubr (&Sget_buffer_create
);
2306 defsubr (&Sgenerate_new_buffer_name
);
2307 defsubr (&Sbuffer_name
);
2308 /*defsubr (&Sbuffer_number);*/
2309 defsubr (&Sbuffer_file_name
);
2310 defsubr (&Sbuffer_local_variables
);
2311 defsubr (&Sbuffer_modified_p
);
2312 defsubr (&Sset_buffer_modified_p
);
2313 defsubr (&Sbuffer_modified_tick
);
2314 defsubr (&Srename_buffer
);
2315 defsubr (&Sother_buffer
);
2316 defsubr (&Sbuffer_disable_undo
);
2317 defsubr (&Sbuffer_enable_undo
);
2318 defsubr (&Skill_buffer
);
2319 defsubr (&Serase_buffer
);
2320 defsubr (&Sswitch_to_buffer
);
2321 defsubr (&Spop_to_buffer
);
2322 defsubr (&Scurrent_buffer
);
2323 defsubr (&Sset_buffer
);
2324 defsubr (&Sbarf_if_buffer_read_only
);
2325 defsubr (&Sbury_buffer
);
2326 defsubr (&Slist_buffers
);
2327 defsubr (&Skill_all_local_variables
);
2329 defsubr (&Soverlayp
);
2330 defsubr (&Smake_overlay
);
2331 defsubr (&Sdelete_overlay
);
2332 defsubr (&Smove_overlay
);
2333 defsubr (&Soverlay_start
);
2334 defsubr (&Soverlay_end
);
2335 defsubr (&Soverlay_buffer
);
2336 defsubr (&Soverlay_properties
);
2337 defsubr (&Soverlays_at
);
2338 defsubr (&Snext_overlay_change
);
2339 defsubr (&Soverlay_recenter
);
2340 defsubr (&Soverlay_lists
);
2341 defsubr (&Soverlay_get
);
2342 defsubr (&Soverlay_put
);
2347 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2348 initial_define_key (control_x_map
, 'k', "kill-buffer");
2349 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");