1 /* Interface code for dealing with text properties.
2 Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2001
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, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "intervals.h"
29 #define NULL (void *)0
32 /* Test for membership, allowing for t (actually any non-cons) to mean the
35 #define TMEM(sym, set) (CONSP (set) ? ! NILP (Fmemq (sym, set)) : ! NILP (set))
38 /* NOTES: previous- and next- property change will have to skip
39 zero-length intervals if they are implemented. This could be done
40 inside next_interval and previous_interval.
42 set_properties needs to deal with the interval property cache.
44 It is assumed that for any interval plist, a property appears
45 only once on the list. Although some code i.e., remove_properties,
46 handles the more general case, the uniqueness of properties is
47 necessary for the system to remain consistent. This requirement
48 is enforced by the subrs installing properties onto the intervals. */
52 Lisp_Object Qmouse_left
;
53 Lisp_Object Qmouse_entered
;
54 Lisp_Object Qpoint_left
;
55 Lisp_Object Qpoint_entered
;
56 Lisp_Object Qcategory
;
57 Lisp_Object Qlocal_map
;
59 /* Visual properties text (including strings) may have. */
60 Lisp_Object Qforeground
, Qbackground
, Qfont
, Qunderline
, Qstipple
;
61 Lisp_Object Qinvisible
, Qread_only
, Qintangible
, Qmouse_face
;
63 /* Sticky properties */
64 Lisp_Object Qfront_sticky
, Qrear_nonsticky
;
66 /* If o1 is a cons whose cdr is a cons, return non-zero and set o2 to
67 the o1's cdr. Otherwise, return zero. This is handy for
69 #define PLIST_ELT_P(o1, o2) (CONSP (o1) && ((o2)=XCDR (o1), CONSP (o2)))
71 Lisp_Object Vinhibit_point_motion_hooks
;
72 Lisp_Object Vdefault_text_properties
;
73 Lisp_Object Vtext_property_default_nonsticky
;
75 /* verify_interval_modification saves insertion hooks here
76 to be run later by report_interval_modification. */
77 Lisp_Object interval_insert_behind_hooks
;
78 Lisp_Object interval_insert_in_front_hooks
;
81 /* Signal a `text-read-only' error. This function makes it easier
82 to capture that error in GDB by putting a breakpoint on it. */
87 Fsignal (Qtext_read_only
, Qnil
);
92 /* Extract the interval at the position pointed to by BEGIN from
93 OBJECT, a string or buffer. Additionally, check that the positions
94 pointed to by BEGIN and END are within the bounds of OBJECT, and
95 reverse them if *BEGIN is greater than *END. The objects pointed
96 to by BEGIN and END may be integers or markers; if the latter, they
97 are coerced to integers.
99 When OBJECT is a string, we increment *BEGIN and *END
100 to make them origin-one.
102 Note that buffer points don't correspond to interval indices.
103 For example, point-max is 1 greater than the index of the last
104 character. This difference is handled in the caller, which uses
105 the validated points to determine a length, and operates on that.
106 Exceptions are Ftext_properties_at, Fnext_property_change, and
107 Fprevious_property_change which call this function with BEGIN == END.
108 Handle this case specially.
110 If FORCE is soft (0), it's OK to return NULL_INTERVAL. Otherwise,
111 create an interval tree for OBJECT if one doesn't exist, provided
112 the object actually contains text. In the current design, if there
113 is no text, there can be no text properties. */
119 validate_interval_range (object
, begin
, end
, force
)
120 Lisp_Object object
, *begin
, *end
;
126 CHECK_STRING_OR_BUFFER (object
);
127 CHECK_NUMBER_COERCE_MARKER (*begin
);
128 CHECK_NUMBER_COERCE_MARKER (*end
);
130 /* If we are asked for a point, but from a subr which operates
131 on a range, then return nothing. */
132 if (EQ (*begin
, *end
) && begin
!= end
)
133 return NULL_INTERVAL
;
135 if (XINT (*begin
) > XINT (*end
))
143 if (BUFFERP (object
))
145 register struct buffer
*b
= XBUFFER (object
);
147 if (!(BUF_BEGV (b
) <= XINT (*begin
) && XINT (*begin
) <= XINT (*end
)
148 && XINT (*end
) <= BUF_ZV (b
)))
149 args_out_of_range (*begin
, *end
);
150 i
= BUF_INTERVALS (b
);
152 /* If there's no text, there are no properties. */
153 if (BUF_BEGV (b
) == BUF_ZV (b
))
154 return NULL_INTERVAL
;
156 searchpos
= XINT (*begin
);
160 register struct Lisp_String
*s
= XSTRING (object
);
162 if (! (0 <= XINT (*begin
) && XINT (*begin
) <= XINT (*end
)
163 && XINT (*end
) <= s
->size
))
164 args_out_of_range (*begin
, *end
);
165 XSETFASTINT (*begin
, XFASTINT (*begin
));
167 XSETFASTINT (*end
, XFASTINT (*end
));
171 return NULL_INTERVAL
;
173 searchpos
= XINT (*begin
);
176 if (NULL_INTERVAL_P (i
))
177 return (force
? create_root_interval (object
) : i
);
179 return find_interval (i
, searchpos
);
182 /* Validate LIST as a property list. If LIST is not a list, then
183 make one consisting of (LIST nil). Otherwise, verify that LIST
184 is even numbered and thus suitable as a plist. */
187 validate_plist (list
)
196 register Lisp_Object tail
;
197 for (i
= 0, tail
= list
; !NILP (tail
); i
++)
203 error ("Odd length text property list");
207 return Fcons (list
, Fcons (Qnil
, Qnil
));
210 /* Return nonzero if interval I has all the properties,
211 with the same values, of list PLIST. */
214 interval_has_all_properties (plist
, i
)
218 register Lisp_Object tail1
, tail2
, sym1
;
221 /* Go through each element of PLIST. */
222 for (tail1
= plist
; ! NILP (tail1
); tail1
= Fcdr (Fcdr (tail1
)))
227 /* Go through I's plist, looking for sym1 */
228 for (tail2
= i
->plist
; ! NILP (tail2
); tail2
= Fcdr (Fcdr (tail2
)))
229 if (EQ (sym1
, Fcar (tail2
)))
231 /* Found the same property on both lists. If the
232 values are unequal, return zero. */
233 if (! EQ (Fcar (Fcdr (tail1
)), Fcar (Fcdr (tail2
))))
236 /* Property has same value on both lists; go to next one. */
248 /* Return nonzero if the plist of interval I has any of the
249 properties of PLIST, regardless of their values. */
252 interval_has_some_properties (plist
, i
)
256 register Lisp_Object tail1
, tail2
, sym
;
258 /* Go through each element of PLIST. */
259 for (tail1
= plist
; ! NILP (tail1
); tail1
= Fcdr (Fcdr (tail1
)))
263 /* Go through i's plist, looking for tail1 */
264 for (tail2
= i
->plist
; ! NILP (tail2
); tail2
= Fcdr (Fcdr (tail2
)))
265 if (EQ (sym
, Fcar (tail2
)))
272 /* Changing the plists of individual intervals. */
274 /* Return the value of PROP in property-list PLIST, or Qunbound if it
277 property_value (plist
, prop
)
278 Lisp_Object plist
, prop
;
282 while (PLIST_ELT_P (plist
, value
))
283 if (EQ (XCAR (plist
), prop
))
286 plist
= XCDR (value
);
291 /* Set the properties of INTERVAL to PROPERTIES,
292 and record undo info for the previous values.
293 OBJECT is the string or buffer that INTERVAL belongs to. */
296 set_properties (properties
, interval
, object
)
297 Lisp_Object properties
, object
;
300 Lisp_Object sym
, value
;
302 if (BUFFERP (object
))
304 /* For each property in the old plist which is missing from PROPERTIES,
305 or has a different value in PROPERTIES, make an undo record. */
306 for (sym
= interval
->plist
;
307 PLIST_ELT_P (sym
, value
);
309 if (! EQ (property_value (properties
, XCAR (sym
)),
312 record_property_change (interval
->position
, LENGTH (interval
),
313 XCAR (sym
), XCAR (value
),
317 /* For each new property that has no value at all in the old plist,
318 make an undo record binding it to nil, so it will be removed. */
319 for (sym
= properties
;
320 PLIST_ELT_P (sym
, value
);
322 if (EQ (property_value (interval
->plist
, XCAR (sym
)), Qunbound
))
324 record_property_change (interval
->position
, LENGTH (interval
),
330 /* Store new properties. */
331 interval
->plist
= Fcopy_sequence (properties
);
334 /* Add the properties of PLIST to the interval I, or set
335 the value of I's property to the value of the property on PLIST
336 if they are different.
338 OBJECT should be the string or buffer the interval is in.
340 Return nonzero if this changes I (i.e., if any members of PLIST
341 are actually added to I's plist) */
344 add_properties (plist
, i
, object
)
349 Lisp_Object tail1
, tail2
, sym1
, val1
;
350 register int changed
= 0;
352 struct gcpro gcpro1
, gcpro2
, gcpro3
;
357 /* No need to protect OBJECT, because we can GC only in the case
358 where it is a buffer, and live buffers are always protected.
359 I and its plist are also protected, via OBJECT. */
360 GCPRO3 (tail1
, sym1
, val1
);
362 /* Go through each element of PLIST. */
363 for (tail1
= plist
; ! NILP (tail1
); tail1
= Fcdr (Fcdr (tail1
)))
366 val1
= Fcar (Fcdr (tail1
));
369 /* Go through I's plist, looking for sym1 */
370 for (tail2
= i
->plist
; ! NILP (tail2
); tail2
= Fcdr (Fcdr (tail2
)))
371 if (EQ (sym1
, Fcar (tail2
)))
373 /* No need to gcpro, because tail2 protects this
374 and it must be a cons cell (we get an error otherwise). */
375 register Lisp_Object this_cdr
;
377 this_cdr
= Fcdr (tail2
);
378 /* Found the property. Now check its value. */
381 /* The properties have the same value on both lists.
382 Continue to the next property. */
383 if (EQ (val1
, Fcar (this_cdr
)))
386 /* Record this change in the buffer, for undo purposes. */
387 if (BUFFERP (object
))
389 record_property_change (i
->position
, LENGTH (i
),
390 sym1
, Fcar (this_cdr
), object
);
393 /* I's property has a different value -- change it */
394 Fsetcar (this_cdr
, val1
);
401 /* Record this change in the buffer, for undo purposes. */
402 if (BUFFERP (object
))
404 record_property_change (i
->position
, LENGTH (i
),
407 i
->plist
= Fcons (sym1
, Fcons (val1
, i
->plist
));
417 /* For any members of PLIST which are properties of I, remove them
419 OBJECT is the string or buffer containing I. */
422 remove_properties (plist
, i
, object
)
427 register Lisp_Object tail1
, tail2
, sym
, current_plist
;
428 register int changed
= 0;
430 current_plist
= i
->plist
;
431 /* Go through each element of plist. */
432 for (tail1
= plist
; ! NILP (tail1
); tail1
= Fcdr (Fcdr (tail1
)))
436 /* First, remove the symbol if its at the head of the list */
437 while (! NILP (current_plist
) && EQ (sym
, Fcar (current_plist
)))
439 if (BUFFERP (object
))
441 record_property_change (i
->position
, LENGTH (i
),
442 sym
, Fcar (Fcdr (current_plist
)),
446 current_plist
= Fcdr (Fcdr (current_plist
));
450 /* Go through i's plist, looking for sym */
451 tail2
= current_plist
;
452 while (! NILP (tail2
))
454 register Lisp_Object
this;
455 this = Fcdr (Fcdr (tail2
));
456 if (EQ (sym
, Fcar (this)))
458 if (BUFFERP (object
))
460 record_property_change (i
->position
, LENGTH (i
),
461 sym
, Fcar (Fcdr (this)), object
);
464 Fsetcdr (Fcdr (tail2
), Fcdr (Fcdr (this)));
472 i
->plist
= current_plist
;
477 /* Remove all properties from interval I. Return non-zero
478 if this changes the interval. */
492 /* Returns the interval of POSITION in OBJECT.
493 POSITION is BEG-based. */
496 interval_of (position
, object
)
504 XSETBUFFER (object
, current_buffer
);
505 else if (EQ (object
, Qt
))
506 return NULL_INTERVAL
;
508 CHECK_STRING_OR_BUFFER (object
);
510 if (BUFFERP (object
))
512 register struct buffer
*b
= XBUFFER (object
);
516 i
= BUF_INTERVALS (b
);
520 register struct Lisp_String
*s
= XSTRING (object
);
527 if (!(beg
<= position
&& position
<= end
))
528 args_out_of_range (make_number (position
), make_number (position
));
529 if (beg
== end
|| NULL_INTERVAL_P (i
))
530 return NULL_INTERVAL
;
532 return find_interval (i
, position
);
535 DEFUN ("text-properties-at", Ftext_properties_at
,
536 Stext_properties_at
, 1, 2, 0,
537 doc
: /* Return the list of properties of the character at POSITION in OBJECT.
538 OBJECT is the string or buffer to look for the properties in;
539 nil means the current buffer.
540 If POSITION is at the end of OBJECT, the value is nil. */)
542 Lisp_Object position
, object
;
547 XSETBUFFER (object
, current_buffer
);
549 i
= validate_interval_range (object
, &position
, &position
, soft
);
550 if (NULL_INTERVAL_P (i
))
552 /* If POSITION is at the end of the interval,
553 it means it's the end of OBJECT.
554 There are no properties at the very end,
555 since no character follows. */
556 if (XINT (position
) == LENGTH (i
) + i
->position
)
562 DEFUN ("get-text-property", Fget_text_property
, Sget_text_property
, 2, 3, 0,
563 doc
: /* Return the value of POSITION's property PROP, in OBJECT.
564 OBJECT is optional and defaults to the current buffer.
565 If POSITION is at the end of OBJECT, the value is nil. */)
566 (position
, prop
, object
)
567 Lisp_Object position
, object
;
570 return textget (Ftext_properties_at (position
, object
), prop
);
573 /* Return the value of POSITION's property PROP, in OBJECT.
574 OBJECT is optional and defaults to the current buffer.
575 If OVERLAY is non-0, then in the case that the returned property is from
576 an overlay, the overlay found is returned in *OVERLAY, otherwise nil is
577 returned in *OVERLAY.
578 If POSITION is at the end of OBJECT, the value is nil.
579 If OBJECT is a buffer, then overlay properties are considered as well as
581 If OBJECT is a window, then that window's buffer is used, but
582 window-specific overlays are considered only if they are associated
585 get_char_property_and_overlay (position
, prop
, object
, overlay
)
586 Lisp_Object position
, object
;
587 register Lisp_Object prop
;
588 Lisp_Object
*overlay
;
590 struct window
*w
= 0;
592 CHECK_NUMBER_COERCE_MARKER (position
);
595 XSETBUFFER (object
, current_buffer
);
597 if (WINDOWP (object
))
599 w
= XWINDOW (object
);
602 if (BUFFERP (object
))
604 int posn
= XINT (position
);
606 Lisp_Object
*overlay_vec
, tem
;
609 struct buffer
*obuf
= current_buffer
;
611 set_buffer_temp (XBUFFER (object
));
613 /* First try with room for 40 overlays. */
615 overlay_vec
= (Lisp_Object
*) alloca (len
* sizeof (Lisp_Object
));
617 noverlays
= overlays_at (posn
, 0, &overlay_vec
, &len
,
618 &next_overlay
, NULL
, 0);
620 /* If there are more than 40,
621 make enough space for all, and try again. */
625 overlay_vec
= (Lisp_Object
*) alloca (len
* sizeof (Lisp_Object
));
626 noverlays
= overlays_at (posn
, 0, &overlay_vec
, &len
,
627 &next_overlay
, NULL
, 0);
629 noverlays
= sort_overlays (overlay_vec
, noverlays
, w
);
631 set_buffer_temp (obuf
);
633 /* Now check the overlays in order of decreasing priority. */
634 while (--noverlays
>= 0)
636 tem
= Foverlay_get (overlay_vec
[noverlays
], prop
);
640 /* Return the overlay we got the property from. */
641 *overlay
= overlay_vec
[noverlays
];
648 /* Indicate that the return value is not from an overlay. */
651 /* Not a buffer, or no appropriate overlay, so fall through to the
653 return Fget_text_property (position
, prop
, object
);
656 DEFUN ("get-char-property", Fget_char_property
, Sget_char_property
, 2, 3, 0,
657 doc
: /* Return the value of POSITION's property PROP, in OBJECT.
658 Both overlay properties and text properties are checked.
659 OBJECT is optional and defaults to the current buffer.
660 If POSITION is at the end of OBJECT, the value is nil.
661 If OBJECT is a buffer, then overlay properties are considered as well as
663 If OBJECT is a window, then that window's buffer is used, but window-specific
664 overlays are considered only if they are associated with OBJECT. */)
665 (position
, prop
, object
)
666 Lisp_Object position
, object
;
667 register Lisp_Object prop
;
669 return get_char_property_and_overlay (position
, prop
, object
, 0);
672 DEFUN ("next-char-property-change", Fnext_char_property_change
,
673 Snext_char_property_change
, 1, 2, 0,
674 doc
: /* Return the position of next text property or overlay change.
675 This scans characters forward from POSITION till it finds a change in
676 some text property, or the beginning or end of an overlay, and returns
677 the position of that.
678 If none is found, the function returns (point-max).
680 If the optional third argument LIMIT is non-nil, don't search
681 past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
683 Lisp_Object position
, limit
;
687 temp
= Fnext_overlay_change (position
);
690 CHECK_NUMBER (limit
);
691 if (XINT (limit
) < XINT (temp
))
694 return Fnext_property_change (position
, Qnil
, temp
);
697 DEFUN ("previous-char-property-change", Fprevious_char_property_change
,
698 Sprevious_char_property_change
, 1, 2, 0,
699 doc
: /* Return the position of previous text property or overlay change.
700 Scans characters backward from POSITION till it finds a change in some
701 text property, or the beginning or end of an overlay, and returns the
703 If none is found, the function returns (point-max).
705 If the optional third argument LIMIT is non-nil, don't search
706 past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
708 Lisp_Object position
, limit
;
712 temp
= Fprevious_overlay_change (position
);
715 CHECK_NUMBER (limit
);
716 if (XINT (limit
) > XINT (temp
))
719 return Fprevious_property_change (position
, Qnil
, temp
);
723 DEFUN ("next-single-char-property-change", Fnext_single_char_property_change
,
724 Snext_single_char_property_change
, 2, 4, 0,
725 doc
: /* Return the position of next text property or overlay change for a specific property.
726 Scans characters forward from POSITION till it finds
727 a change in the PROP property, then returns the position of the change.
728 The optional third argument OBJECT is the string or buffer to scan.
729 The property values are compared with `eq'.
730 If the property is constant all the way to the end of OBJECT, return the
731 last valid position in OBJECT.
732 If the optional fourth argument LIMIT is non-nil, don't search
733 past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
734 (position
, prop
, object
, limit
)
735 Lisp_Object prop
, position
, object
, limit
;
737 if (STRINGP (object
))
739 position
= Fnext_single_property_change (position
, prop
, object
, limit
);
743 position
= make_number (XSTRING (object
)->size
);
750 Lisp_Object initial_value
, value
;
751 int count
= specpdl_ptr
- specpdl
;
754 CHECK_BUFFER (object
);
756 if (BUFFERP (object
) && current_buffer
!= XBUFFER (object
))
758 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
759 Fset_buffer (object
);
762 initial_value
= Fget_char_property (position
, prop
, object
);
765 XSETFASTINT (limit
, BUF_ZV (current_buffer
));
767 CHECK_NUMBER_COERCE_MARKER (limit
);
771 position
= Fnext_char_property_change (position
, limit
);
772 if (XFASTINT (position
) >= XFASTINT (limit
)) {
777 value
= Fget_char_property (position
, prop
, object
);
778 if (!EQ (value
, initial_value
))
782 unbind_to (count
, Qnil
);
788 DEFUN ("previous-single-char-property-change",
789 Fprevious_single_char_property_change
,
790 Sprevious_single_char_property_change
, 2, 4, 0,
791 doc
: /* Return the position of previous text property or overlay change for a specific property.
792 Scans characters backward from POSITION till it finds
793 a change in the PROP property, then returns the position of the change.
794 The optional third argument OBJECT is the string or buffer to scan.
795 The property values are compared with `eq'.
796 If the property is constant all the way to the start of OBJECT, return the
797 first valid position in OBJECT.
798 If the optional fourth argument LIMIT is non-nil, don't search
799 back past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
800 (position
, prop
, object
, limit
)
801 Lisp_Object prop
, position
, object
, limit
;
803 if (STRINGP (object
))
805 position
= Fprevious_single_property_change (position
, prop
, object
, limit
);
809 position
= make_number (XSTRING (object
)->size
);
816 int count
= specpdl_ptr
- specpdl
;
819 CHECK_BUFFER (object
);
821 if (BUFFERP (object
) && current_buffer
!= XBUFFER (object
))
823 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
824 Fset_buffer (object
);
828 XSETFASTINT (limit
, BUF_BEGV (current_buffer
));
830 CHECK_NUMBER_COERCE_MARKER (limit
);
832 if (XFASTINT (position
) <= XFASTINT (limit
))
836 Lisp_Object initial_value
=
837 Fget_char_property (make_number (XFASTINT (position
) - 1),
842 position
= Fprevious_char_property_change (position
, limit
);
844 if (XFASTINT (position
) <= XFASTINT (limit
))
852 Fget_char_property (make_number (XFASTINT (position
) - 1),
855 if (!EQ (value
, initial_value
))
861 unbind_to (count
, Qnil
);
867 DEFUN ("next-property-change", Fnext_property_change
,
868 Snext_property_change
, 1, 3, 0,
869 doc
: /* Return the position of next property change.
870 Scans characters forward from POSITION in OBJECT till it finds
871 a change in some text property, then returns the position of the change.
872 The optional second argument OBJECT is the string or buffer to scan.
873 Return nil if the property is constant all the way to the end of OBJECT.
874 If the value is non-nil, it is a position greater than POSITION, never equal.
876 If the optional third argument LIMIT is non-nil, don't search
877 past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
878 (position
, object
, limit
)
879 Lisp_Object position
, object
, limit
;
881 register INTERVAL i
, next
;
884 XSETBUFFER (object
, current_buffer
);
886 if (! NILP (limit
) && ! EQ (limit
, Qt
))
887 CHECK_NUMBER_COERCE_MARKER (limit
);
889 i
= validate_interval_range (object
, &position
, &position
, soft
);
891 /* If LIMIT is t, return start of next interval--don't
892 bother checking further intervals. */
895 if (NULL_INTERVAL_P (i
))
898 next
= next_interval (i
);
900 if (NULL_INTERVAL_P (next
))
901 XSETFASTINT (position
, (STRINGP (object
)
902 ? XSTRING (object
)->size
903 : BUF_ZV (XBUFFER (object
))));
905 XSETFASTINT (position
, next
->position
);
909 if (NULL_INTERVAL_P (i
))
912 next
= next_interval (i
);
914 while (! NULL_INTERVAL_P (next
) && intervals_equal (i
, next
)
915 && (NILP (limit
) || next
->position
< XFASTINT (limit
)))
916 next
= next_interval (next
);
918 if (NULL_INTERVAL_P (next
))
920 if (! NILP (limit
) && !(next
->position
< XFASTINT (limit
)))
923 XSETFASTINT (position
, next
->position
);
927 /* Return 1 if there's a change in some property between BEG and END. */
930 property_change_between_p (beg
, end
)
933 register INTERVAL i
, next
;
934 Lisp_Object object
, pos
;
936 XSETBUFFER (object
, current_buffer
);
937 XSETFASTINT (pos
, beg
);
939 i
= validate_interval_range (object
, &pos
, &pos
, soft
);
940 if (NULL_INTERVAL_P (i
))
943 next
= next_interval (i
);
944 while (! NULL_INTERVAL_P (next
) && intervals_equal (i
, next
))
946 next
= next_interval (next
);
947 if (NULL_INTERVAL_P (next
))
949 if (next
->position
>= end
)
953 if (NULL_INTERVAL_P (next
))
959 DEFUN ("next-single-property-change", Fnext_single_property_change
,
960 Snext_single_property_change
, 2, 4, 0,
961 doc
: /* Return the position of next property change for a specific property.
962 Scans characters forward from POSITION till it finds
963 a change in the PROP property, then returns the position of the change.
964 The optional third argument OBJECT is the string or buffer to scan.
965 The property values are compared with `eq'.
966 Return nil if the property is constant all the way to the end of OBJECT.
967 If the value is non-nil, it is a position greater than POSITION, never equal.
969 If the optional fourth argument LIMIT is non-nil, don't search
970 past position LIMIT; return LIMIT if nothing is found before LIMIT. */)
971 (position
, prop
, object
, limit
)
972 Lisp_Object position
, prop
, object
, limit
;
974 register INTERVAL i
, next
;
975 register Lisp_Object here_val
;
978 XSETBUFFER (object
, current_buffer
);
981 CHECK_NUMBER_COERCE_MARKER (limit
);
983 i
= validate_interval_range (object
, &position
, &position
, soft
);
984 if (NULL_INTERVAL_P (i
))
987 here_val
= textget (i
->plist
, prop
);
988 next
= next_interval (i
);
989 while (! NULL_INTERVAL_P (next
)
990 && EQ (here_val
, textget (next
->plist
, prop
))
991 && (NILP (limit
) || next
->position
< XFASTINT (limit
)))
992 next
= next_interval (next
);
994 if (NULL_INTERVAL_P (next
))
996 if (! NILP (limit
) && !(next
->position
< XFASTINT (limit
)))
999 return make_number (next
->position
);
1002 DEFUN ("previous-property-change", Fprevious_property_change
,
1003 Sprevious_property_change
, 1, 3, 0,
1004 doc
: /* Return the position of previous property change.
1005 Scans characters backwards from POSITION in OBJECT till it finds
1006 a change in some text property, then returns the position of the change.
1007 The optional second argument OBJECT is the string or buffer to scan.
1008 Return nil if the property is constant all the way to the start of OBJECT.
1009 If the value is non-nil, it is a position less than POSITION, never equal.
1011 If the optional third argument LIMIT is non-nil, don't search
1012 back past position LIMIT; return LIMIT if nothing is found until LIMIT. */)
1013 (position
, object
, limit
)
1014 Lisp_Object position
, object
, limit
;
1016 register INTERVAL i
, previous
;
1019 XSETBUFFER (object
, current_buffer
);
1022 CHECK_NUMBER_COERCE_MARKER (limit
);
1024 i
= validate_interval_range (object
, &position
, &position
, soft
);
1025 if (NULL_INTERVAL_P (i
))
1028 /* Start with the interval containing the char before point. */
1029 if (i
->position
== XFASTINT (position
))
1030 i
= previous_interval (i
);
1032 previous
= previous_interval (i
);
1033 while (! NULL_INTERVAL_P (previous
) && intervals_equal (previous
, i
)
1035 || (previous
->position
+ LENGTH (previous
) > XFASTINT (limit
))))
1036 previous
= previous_interval (previous
);
1037 if (NULL_INTERVAL_P (previous
))
1040 && !(previous
->position
+ LENGTH (previous
) > XFASTINT (limit
)))
1043 return make_number (previous
->position
+ LENGTH (previous
));
1046 DEFUN ("previous-single-property-change", Fprevious_single_property_change
,
1047 Sprevious_single_property_change
, 2, 4, 0,
1048 doc
: /* Return the position of previous property change for a specific property.
1049 Scans characters backward from POSITION till it finds
1050 a change in the PROP property, then returns the position of the change.
1051 The optional third argument OBJECT is the string or buffer to scan.
1052 The property values are compared with `eq'.
1053 Return nil if the property is constant all the way to the start of OBJECT.
1054 If the value is non-nil, it is a position less than POSITION, never equal.
1056 If the optional fourth argument LIMIT is non-nil, don't search
1057 back past position LIMIT; return LIMIT if nothing is found until LIMIT. */)
1058 (position
, prop
, object
, limit
)
1059 Lisp_Object position
, prop
, object
, limit
;
1061 register INTERVAL i
, previous
;
1062 register Lisp_Object here_val
;
1065 XSETBUFFER (object
, current_buffer
);
1068 CHECK_NUMBER_COERCE_MARKER (limit
);
1070 i
= validate_interval_range (object
, &position
, &position
, soft
);
1072 /* Start with the interval containing the char before point. */
1073 if (! NULL_INTERVAL_P (i
) && i
->position
== XFASTINT (position
))
1074 i
= previous_interval (i
);
1076 if (NULL_INTERVAL_P (i
))
1079 here_val
= textget (i
->plist
, prop
);
1080 previous
= previous_interval (i
);
1081 while (! NULL_INTERVAL_P (previous
)
1082 && EQ (here_val
, textget (previous
->plist
, prop
))
1084 || (previous
->position
+ LENGTH (previous
) > XFASTINT (limit
))))
1085 previous
= previous_interval (previous
);
1086 if (NULL_INTERVAL_P (previous
))
1089 && !(previous
->position
+ LENGTH (previous
) > XFASTINT (limit
)))
1092 return make_number (previous
->position
+ LENGTH (previous
));
1095 /* Callers note, this can GC when OBJECT is a buffer (or nil). */
1097 DEFUN ("add-text-properties", Fadd_text_properties
,
1098 Sadd_text_properties
, 3, 4, 0,
1099 doc
: /* Add properties to the text from START to END.
1100 The third argument PROPERTIES is a property list
1101 specifying the property values to add.
1102 The optional fourth argument, OBJECT,
1103 is the string or buffer containing the text.
1104 Return t if any property value actually changed, nil otherwise. */)
1105 (start
, end
, properties
, object
)
1106 Lisp_Object start
, end
, properties
, object
;
1108 register INTERVAL i
, unchanged
;
1109 register int s
, len
, modified
= 0;
1110 struct gcpro gcpro1
;
1112 properties
= validate_plist (properties
);
1113 if (NILP (properties
))
1117 XSETBUFFER (object
, current_buffer
);
1119 i
= validate_interval_range (object
, &start
, &end
, hard
);
1120 if (NULL_INTERVAL_P (i
))
1124 len
= XINT (end
) - s
;
1126 /* No need to protect OBJECT, because we GC only if it's a buffer,
1127 and live buffers are always protected. */
1128 GCPRO1 (properties
);
1130 /* If we're not starting on an interval boundary, we have to
1131 split this interval. */
1132 if (i
->position
!= s
)
1134 /* If this interval already has the properties, we can
1136 if (interval_has_all_properties (properties
, i
))
1138 int got
= (LENGTH (i
) - (s
- i
->position
));
1140 RETURN_UNGCPRO (Qnil
);
1142 i
= next_interval (i
);
1147 i
= split_interval_right (unchanged
, s
- unchanged
->position
);
1148 copy_properties (unchanged
, i
);
1152 if (BUFFERP (object
))
1153 modify_region (XBUFFER (object
), XINT (start
), XINT (end
));
1155 /* We are at the beginning of interval I, with LEN chars to scan. */
1161 if (LENGTH (i
) >= len
)
1163 /* We can UNGCPRO safely here, because there will be just
1164 one more chance to gc, in the next call to add_properties,
1165 and after that we will not need PROPERTIES or OBJECT again. */
1168 if (interval_has_all_properties (properties
, i
))
1170 if (BUFFERP (object
))
1171 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1172 XINT (end
) - XINT (start
));
1174 return modified
? Qt
: Qnil
;
1177 if (LENGTH (i
) == len
)
1179 add_properties (properties
, i
, object
);
1180 if (BUFFERP (object
))
1181 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1182 XINT (end
) - XINT (start
));
1186 /* i doesn't have the properties, and goes past the change limit */
1188 i
= split_interval_left (unchanged
, len
);
1189 copy_properties (unchanged
, i
);
1190 add_properties (properties
, i
, object
);
1191 if (BUFFERP (object
))
1192 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1193 XINT (end
) - XINT (start
));
1198 modified
+= add_properties (properties
, i
, object
);
1199 i
= next_interval (i
);
1203 /* Callers note, this can GC when OBJECT is a buffer (or nil). */
1205 DEFUN ("put-text-property", Fput_text_property
,
1206 Sput_text_property
, 4, 5, 0,
1207 doc
: /* Set one property of the text from START to END.
1208 The third and fourth arguments PROPERTY and VALUE
1209 specify the property to add.
1210 The optional fifth argument, OBJECT,
1211 is the string or buffer containing the text. */)
1212 (start
, end
, property
, value
, object
)
1213 Lisp_Object start
, end
, property
, value
, object
;
1215 Fadd_text_properties (start
, end
,
1216 Fcons (property
, Fcons (value
, Qnil
)),
1221 DEFUN ("set-text-properties", Fset_text_properties
,
1222 Sset_text_properties
, 3, 4, 0,
1223 doc
: /* Completely replace properties of text from START to END.
1224 The third argument PROPERTIES is the new property list.
1225 The optional fourth argument, OBJECT,
1226 is the string or buffer containing the text.
1227 If OBJECT is omitted or nil, it defaults to the current buffer.
1228 If PROPERTIES is nil, the effect is to remove all properties from
1229 the designated part of OBJECT. */)
1230 (start
, end
, properties
, object
)
1231 Lisp_Object start
, end
, properties
, object
;
1233 return set_text_properties (start
, end
, properties
, object
, Qt
);
1237 /* Replace properties of text from START to END with new list of
1238 properties PROPERTIES. OBJECT is the buffer or string containing
1239 the text. OBJECT nil means use the current buffer.
1240 SIGNAL_AFTER_CHANGE_P nil means don't signal after changes. Value
1241 is non-nil if properties were replaced; it is nil if there weren't
1242 any properties to replace. */
1245 set_text_properties (start
, end
, properties
, object
, signal_after_change_p
)
1246 Lisp_Object start
, end
, properties
, object
, signal_after_change_p
;
1248 register INTERVAL i
;
1249 Lisp_Object ostart
, oend
;
1254 properties
= validate_plist (properties
);
1257 XSETBUFFER (object
, current_buffer
);
1259 /* If we want no properties for a whole string,
1260 get rid of its intervals. */
1261 if (NILP (properties
) && STRINGP (object
)
1262 && XFASTINT (start
) == 0
1263 && XFASTINT (end
) == XSTRING (object
)->size
)
1265 if (! XSTRING (object
)->intervals
)
1268 XSTRING (object
)->intervals
= 0;
1272 i
= validate_interval_range (object
, &start
, &end
, soft
);
1274 if (NULL_INTERVAL_P (i
))
1276 /* If buffer has no properties, and we want none, return now. */
1277 if (NILP (properties
))
1280 /* Restore the original START and END values
1281 because validate_interval_range increments them for strings. */
1285 i
= validate_interval_range (object
, &start
, &end
, hard
);
1286 /* This can return if start == end. */
1287 if (NULL_INTERVAL_P (i
))
1291 if (BUFFERP (object
))
1292 modify_region (XBUFFER (object
), XINT (start
), XINT (end
));
1294 set_text_properties_1 (start
, end
, properties
, object
, i
);
1296 if (BUFFERP (object
) && !NILP (signal_after_change_p
))
1297 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1298 XINT (end
) - XINT (start
));
1302 /* Replace properties of text from START to END with new list of
1303 properties PROPERTIES. BUFFER is the buffer containing
1304 the text. This does not obey any hooks.
1305 You can provide the interval that START is located in as I,
1306 or pass NULL for I and this function will find it. */
1309 set_text_properties_1 (start
, end
, properties
, buffer
, i
)
1310 Lisp_Object start
, end
, properties
, buffer
;
1313 register INTERVAL prev_changed
= NULL_INTERVAL
;
1314 register int s
, len
;
1318 len
= XINT (end
) - s
;
1320 i
= find_interval (BUF_INTERVALS (XBUFFER (buffer
)), s
);
1322 if (i
->position
!= s
)
1325 i
= split_interval_right (unchanged
, s
- unchanged
->position
);
1327 if (LENGTH (i
) > len
)
1329 copy_properties (unchanged
, i
);
1330 i
= split_interval_left (i
, len
);
1331 set_properties (properties
, i
, buffer
);
1335 set_properties (properties
, i
, buffer
);
1337 if (LENGTH (i
) == len
)
1342 i
= next_interval (i
);
1345 /* We are starting at the beginning of an interval, I */
1351 if (LENGTH (i
) >= len
)
1353 if (LENGTH (i
) > len
)
1354 i
= split_interval_left (i
, len
);
1356 /* We have to call set_properties even if we are going to
1357 merge the intervals, so as to make the undo records
1358 and cause redisplay to happen. */
1359 set_properties (properties
, i
, buffer
);
1360 if (!NULL_INTERVAL_P (prev_changed
))
1361 merge_interval_left (i
);
1367 /* We have to call set_properties even if we are going to
1368 merge the intervals, so as to make the undo records
1369 and cause redisplay to happen. */
1370 set_properties (properties
, i
, buffer
);
1371 if (NULL_INTERVAL_P (prev_changed
))
1374 prev_changed
= i
= merge_interval_left (i
);
1376 i
= next_interval (i
);
1380 DEFUN ("remove-text-properties", Fremove_text_properties
,
1381 Sremove_text_properties
, 3, 4, 0,
1382 doc
: /* Remove some properties from text from START to END.
1383 The third argument PROPERTIES is a property list
1384 whose property names specify the properties to remove.
1385 \(The values stored in PROPERTIES are ignored.)
1386 The optional fourth argument, OBJECT,
1387 is the string or buffer containing the text.
1388 Return t if any property was actually removed, nil otherwise. */)
1389 (start
, end
, properties
, object
)
1390 Lisp_Object start
, end
, properties
, object
;
1392 register INTERVAL i
, unchanged
;
1393 register int s
, len
, modified
= 0;
1396 XSETBUFFER (object
, current_buffer
);
1398 i
= validate_interval_range (object
, &start
, &end
, soft
);
1399 if (NULL_INTERVAL_P (i
))
1403 len
= XINT (end
) - s
;
1405 if (i
->position
!= s
)
1407 /* No properties on this first interval -- return if
1408 it covers the entire region. */
1409 if (! interval_has_some_properties (properties
, i
))
1411 int got
= (LENGTH (i
) - (s
- i
->position
));
1415 i
= next_interval (i
);
1417 /* Split away the beginning of this interval; what we don't
1422 i
= split_interval_right (unchanged
, s
- unchanged
->position
);
1423 copy_properties (unchanged
, i
);
1427 if (BUFFERP (object
))
1428 modify_region (XBUFFER (object
), XINT (start
), XINT (end
));
1430 /* We are at the beginning of an interval, with len to scan */
1436 if (LENGTH (i
) >= len
)
1438 if (! interval_has_some_properties (properties
, i
))
1439 return modified
? Qt
: Qnil
;
1441 if (LENGTH (i
) == len
)
1443 remove_properties (properties
, i
, object
);
1444 if (BUFFERP (object
))
1445 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1446 XINT (end
) - XINT (start
));
1450 /* i has the properties, and goes past the change limit */
1452 i
= split_interval_left (i
, len
);
1453 copy_properties (unchanged
, i
);
1454 remove_properties (properties
, i
, object
);
1455 if (BUFFERP (object
))
1456 signal_after_change (XINT (start
), XINT (end
) - XINT (start
),
1457 XINT (end
) - XINT (start
));
1462 modified
+= remove_properties (properties
, i
, object
);
1463 i
= next_interval (i
);
1467 DEFUN ("text-property-any", Ftext_property_any
,
1468 Stext_property_any
, 4, 5, 0,
1469 doc
: /* Check text from START to END for property PROPERTY equalling VALUE.
1470 If so, return the position of the first character whose property PROPERTY
1471 is `eq' to VALUE. Otherwise return nil.
1472 The optional fifth argument, OBJECT, is the string or buffer
1473 containing the text. */)
1474 (start
, end
, property
, value
, object
)
1475 Lisp_Object start
, end
, property
, value
, object
;
1477 register INTERVAL i
;
1478 register int e
, pos
;
1481 XSETBUFFER (object
, current_buffer
);
1482 i
= validate_interval_range (object
, &start
, &end
, soft
);
1483 if (NULL_INTERVAL_P (i
))
1484 return (!NILP (value
) || EQ (start
, end
) ? Qnil
: start
);
1487 while (! NULL_INTERVAL_P (i
))
1489 if (i
->position
>= e
)
1491 if (EQ (textget (i
->plist
, property
), value
))
1494 if (pos
< XINT (start
))
1496 return make_number (pos
);
1498 i
= next_interval (i
);
1503 DEFUN ("text-property-not-all", Ftext_property_not_all
,
1504 Stext_property_not_all
, 4, 5, 0,
1505 doc
: /* Check text from START to END for property PROPERTY not equalling VALUE.
1506 If so, return the position of the first character whose property PROPERTY
1507 is not `eq' to VALUE. Otherwise, return nil.
1508 The optional fifth argument, OBJECT, is the string or buffer
1509 containing the text. */)
1510 (start
, end
, property
, value
, object
)
1511 Lisp_Object start
, end
, property
, value
, object
;
1513 register INTERVAL i
;
1517 XSETBUFFER (object
, current_buffer
);
1518 i
= validate_interval_range (object
, &start
, &end
, soft
);
1519 if (NULL_INTERVAL_P (i
))
1520 return (NILP (value
) || EQ (start
, end
)) ? Qnil
: start
;
1524 while (! NULL_INTERVAL_P (i
))
1526 if (i
->position
>= e
)
1528 if (! EQ (textget (i
->plist
, property
), value
))
1530 if (i
->position
> s
)
1532 return make_number (s
);
1534 i
= next_interval (i
);
1539 /* I don't think this is the right interface to export; how often do you
1540 want to do something like this, other than when you're copying objects
1543 I think it would be better to have a pair of functions, one which
1544 returns the text properties of a region as a list of ranges and
1545 plists, and another which applies such a list to another object. */
1547 /* Add properties from SRC to SRC of SRC, starting at POS in DEST.
1548 SRC and DEST may each refer to strings or buffers.
1549 Optional sixth argument PROP causes only that property to be copied.
1550 Properties are copied to DEST as if by `add-text-properties'.
1551 Return t if any property value actually changed, nil otherwise. */
1553 /* Note this can GC when DEST is a buffer. */
1556 copy_text_properties (start
, end
, src
, pos
, dest
, prop
)
1557 Lisp_Object start
, end
, src
, pos
, dest
, prop
;
1563 int s
, e
, e2
, p
, len
, modified
= 0;
1564 struct gcpro gcpro1
, gcpro2
;
1566 i
= validate_interval_range (src
, &start
, &end
, soft
);
1567 if (NULL_INTERVAL_P (i
))
1570 CHECK_NUMBER_COERCE_MARKER (pos
);
1572 Lisp_Object dest_start
, dest_end
;
1575 XSETFASTINT (dest_end
, XINT (dest_start
) + (XINT (end
) - XINT (start
)));
1576 /* Apply this to a copy of pos; it will try to increment its arguments,
1577 which we don't want. */
1578 validate_interval_range (dest
, &dest_start
, &dest_end
, soft
);
1589 e2
= i
->position
+ LENGTH (i
);
1596 while (! NILP (plist
))
1598 if (EQ (Fcar (plist
), prop
))
1600 plist
= Fcons (prop
, Fcons (Fcar (Fcdr (plist
)), Qnil
));
1603 plist
= Fcdr (Fcdr (plist
));
1607 /* Must defer modifications to the interval tree in case src
1608 and dest refer to the same string or buffer. */
1609 stuff
= Fcons (Fcons (make_number (p
),
1610 Fcons (make_number (p
+ len
),
1611 Fcons (plist
, Qnil
))),
1615 i
= next_interval (i
);
1616 if (NULL_INTERVAL_P (i
))
1623 GCPRO2 (stuff
, dest
);
1625 while (! NILP (stuff
))
1628 res
= Fadd_text_properties (Fcar (res
), Fcar (Fcdr (res
)),
1629 Fcar (Fcdr (Fcdr (res
))), dest
);
1632 stuff
= Fcdr (stuff
);
1637 return modified
? Qt
: Qnil
;
1641 /* Return a list representing the text properties of OBJECT between
1642 START and END. if PROP is non-nil, report only on that property.
1643 Each result list element has the form (S E PLIST), where S and E
1644 are positions in OBJECT and PLIST is a property list containing the
1645 text properties of OBJECT between S and E. Value is nil if OBJECT
1646 doesn't contain text properties between START and END. */
1649 text_property_list (object
, start
, end
, prop
)
1650 Lisp_Object object
, start
, end
, prop
;
1657 i
= validate_interval_range (object
, &start
, &end
, soft
);
1658 if (!NULL_INTERVAL_P (i
))
1660 int s
= XINT (start
);
1665 int interval_end
, len
;
1668 interval_end
= i
->position
+ LENGTH (i
);
1669 if (interval_end
> e
)
1671 len
= interval_end
- s
;
1676 for (; !NILP (plist
); plist
= Fcdr (Fcdr (plist
)))
1677 if (EQ (Fcar (plist
), prop
))
1679 plist
= Fcons (prop
, Fcons (Fcar (Fcdr (plist
)), Qnil
));
1684 result
= Fcons (Fcons (make_number (s
),
1685 Fcons (make_number (s
+ len
),
1686 Fcons (plist
, Qnil
))),
1689 i
= next_interval (i
);
1690 if (NULL_INTERVAL_P (i
))
1700 /* Add text properties to OBJECT from LIST. LIST is a list of triples
1701 (START END PLIST), where START and END are positions and PLIST is a
1702 property list containing the text properties to add. Adjust START
1703 and END positions by DELTA before adding properties. Value is
1704 non-zero if OBJECT was modified. */
1707 add_text_properties_from_list (object
, list
, delta
)
1708 Lisp_Object object
, list
, delta
;
1710 struct gcpro gcpro1
, gcpro2
;
1713 GCPRO2 (list
, object
);
1715 for (; CONSP (list
); list
= XCDR (list
))
1717 Lisp_Object item
, start
, end
, plist
, tem
;
1720 start
= make_number (XINT (XCAR (item
)) + XINT (delta
));
1721 end
= make_number (XINT (XCAR (XCDR (item
))) + XINT (delta
));
1722 plist
= XCAR (XCDR (XCDR (item
)));
1724 tem
= Fadd_text_properties (start
, end
, plist
, object
);
1735 /* Modify end-points of ranges in LIST destructively. LIST is a list
1736 as returned from text_property_list. Change end-points equal to
1737 OLD_END to NEW_END. */
1740 extend_property_ranges (list
, old_end
, new_end
)
1741 Lisp_Object list
, old_end
, new_end
;
1743 for (; CONSP (list
); list
= XCDR (list
))
1745 Lisp_Object item
, end
;
1748 end
= XCAR (XCDR (item
));
1750 if (EQ (end
, old_end
))
1751 XSETCAR (XCDR (item
), new_end
);
1757 /* Call the modification hook functions in LIST, each with START and END. */
1760 call_mod_hooks (list
, start
, end
)
1761 Lisp_Object list
, start
, end
;
1763 struct gcpro gcpro1
;
1765 while (!NILP (list
))
1767 call2 (Fcar (list
), start
, end
);
1773 /* Check for read-only intervals between character positions START ... END,
1774 in BUF, and signal an error if we find one.
1776 Then check for any modification hooks in the range.
1777 Create a list of all these hooks in lexicographic order,
1778 eliminating consecutive extra copies of the same hook. Then call
1779 those hooks in order, with START and END - 1 as arguments. */
1782 verify_interval_modification (buf
, start
, end
)
1786 register INTERVAL intervals
= BUF_INTERVALS (buf
);
1787 register INTERVAL i
;
1789 register Lisp_Object prev_mod_hooks
;
1790 Lisp_Object mod_hooks
;
1791 struct gcpro gcpro1
;
1794 prev_mod_hooks
= Qnil
;
1797 interval_insert_behind_hooks
= Qnil
;
1798 interval_insert_in_front_hooks
= Qnil
;
1800 if (NULL_INTERVAL_P (intervals
))
1810 /* For an insert operation, check the two chars around the position. */
1813 INTERVAL prev
= NULL
;
1814 Lisp_Object before
, after
;
1816 /* Set I to the interval containing the char after START,
1817 and PREV to the interval containing the char before START.
1818 Either one may be null. They may be equal. */
1819 i
= find_interval (intervals
, start
);
1821 if (start
== BUF_BEGV (buf
))
1823 else if (i
->position
== start
)
1824 prev
= previous_interval (i
);
1825 else if (i
->position
< start
)
1827 if (start
== BUF_ZV (buf
))
1830 /* If Vinhibit_read_only is set and is not a list, we can
1831 skip the read_only checks. */
1832 if (NILP (Vinhibit_read_only
) || CONSP (Vinhibit_read_only
))
1834 /* If I and PREV differ we need to check for the read-only
1835 property together with its stickiness. If either I or
1836 PREV are 0, this check is all we need.
1837 We have to take special care, since read-only may be
1838 indirectly defined via the category property. */
1841 if (! NULL_INTERVAL_P (i
))
1843 after
= textget (i
->plist
, Qread_only
);
1845 /* If interval I is read-only and read-only is
1846 front-sticky, inhibit insertion.
1847 Check for read-only as well as category. */
1849 && NILP (Fmemq (after
, Vinhibit_read_only
)))
1853 tem
= textget (i
->plist
, Qfront_sticky
);
1854 if (TMEM (Qread_only
, tem
)
1855 || (NILP (Fplist_get (i
->plist
, Qread_only
))
1856 && TMEM (Qcategory
, tem
)))
1861 if (! NULL_INTERVAL_P (prev
))
1863 before
= textget (prev
->plist
, Qread_only
);
1865 /* If interval PREV is read-only and read-only isn't
1866 rear-nonsticky, inhibit insertion.
1867 Check for read-only as well as category. */
1869 && NILP (Fmemq (before
, Vinhibit_read_only
)))
1873 tem
= textget (prev
->plist
, Qrear_nonsticky
);
1874 if (! TMEM (Qread_only
, tem
)
1875 && (! NILP (Fplist_get (prev
->plist
,Qread_only
))
1876 || ! TMEM (Qcategory
, tem
)))
1881 else if (! NULL_INTERVAL_P (i
))
1883 after
= textget (i
->plist
, Qread_only
);
1885 /* If interval I is read-only and read-only is
1886 front-sticky, inhibit insertion.
1887 Check for read-only as well as category. */
1888 if (! NILP (after
) && NILP (Fmemq (after
, Vinhibit_read_only
)))
1892 tem
= textget (i
->plist
, Qfront_sticky
);
1893 if (TMEM (Qread_only
, tem
)
1894 || (NILP (Fplist_get (i
->plist
, Qread_only
))
1895 && TMEM (Qcategory
, tem
)))
1898 tem
= textget (prev
->plist
, Qrear_nonsticky
);
1899 if (! TMEM (Qread_only
, tem
)
1900 && (! NILP (Fplist_get (prev
->plist
, Qread_only
))
1901 || ! TMEM (Qcategory
, tem
)))
1907 /* Run both insert hooks (just once if they're the same). */
1908 if (!NULL_INTERVAL_P (prev
))
1909 interval_insert_behind_hooks
1910 = textget (prev
->plist
, Qinsert_behind_hooks
);
1911 if (!NULL_INTERVAL_P (i
))
1912 interval_insert_in_front_hooks
1913 = textget (i
->plist
, Qinsert_in_front_hooks
);
1917 /* Loop over intervals on or next to START...END,
1918 collecting their hooks. */
1920 i
= find_interval (intervals
, start
);
1923 if (! INTERVAL_WRITABLE_P (i
))
1926 if (!inhibit_modification_hooks
)
1928 mod_hooks
= textget (i
->plist
, Qmodification_hooks
);
1929 if (! NILP (mod_hooks
) && ! EQ (mod_hooks
, prev_mod_hooks
))
1931 hooks
= Fcons (mod_hooks
, hooks
);
1932 prev_mod_hooks
= mod_hooks
;
1936 i
= next_interval (i
);
1938 /* Keep going thru the interval containing the char before END. */
1939 while (! NULL_INTERVAL_P (i
) && i
->position
< end
);
1941 if (!inhibit_modification_hooks
)
1944 hooks
= Fnreverse (hooks
);
1945 while (! EQ (hooks
, Qnil
))
1947 call_mod_hooks (Fcar (hooks
), make_number (start
),
1949 hooks
= Fcdr (hooks
);
1956 /* Run the interval hooks for an insertion on character range START ... END.
1957 verify_interval_modification chose which hooks to run;
1958 this function is called after the insertion happens
1959 so it can indicate the range of inserted text. */
1962 report_interval_modification (start
, end
)
1963 Lisp_Object start
, end
;
1965 if (! NILP (interval_insert_behind_hooks
))
1966 call_mod_hooks (interval_insert_behind_hooks
, start
, end
);
1967 if (! NILP (interval_insert_in_front_hooks
)
1968 && ! EQ (interval_insert_in_front_hooks
,
1969 interval_insert_behind_hooks
))
1970 call_mod_hooks (interval_insert_in_front_hooks
, start
, end
);
1976 DEFVAR_LISP ("default-text-properties", &Vdefault_text_properties
,
1977 doc
: /* Property-list used as default values.
1978 The value of a property in this list is seen as the value for every
1979 character that does not have its own value for that property. */);
1980 Vdefault_text_properties
= Qnil
;
1982 DEFVAR_LISP ("inhibit-point-motion-hooks", &Vinhibit_point_motion_hooks
,
1983 doc
: /* If non-nil, don't run `point-left' and `point-entered' text properties.
1984 This also inhibits the use of the `intangible' text property. */);
1985 Vinhibit_point_motion_hooks
= Qnil
;
1987 DEFVAR_LISP ("text-property-default-nonsticky",
1988 &Vtext_property_default_nonsticky
,
1989 doc
: /* Alist of properties vs the corresponding non-stickinesses.
1990 Each element has the form (PROPERTY . NONSTICKINESS).
1992 If a character in a buffer has PROPERTY, new text inserted adjacent to
1993 the character doesn't inherit PROPERTY if NONSTICKINESS is non-nil,
1994 inherits it if NONSTICKINESS is nil. The front-sticky and
1995 rear-nonsticky properties of the character overrides NONSTICKINESS. */);
1996 Vtext_property_default_nonsticky
= Qnil
;
1998 staticpro (&interval_insert_behind_hooks
);
1999 staticpro (&interval_insert_in_front_hooks
);
2000 interval_insert_behind_hooks
= Qnil
;
2001 interval_insert_in_front_hooks
= Qnil
;
2004 /* Common attributes one might give text */
2006 staticpro (&Qforeground
);
2007 Qforeground
= intern ("foreground");
2008 staticpro (&Qbackground
);
2009 Qbackground
= intern ("background");
2011 Qfont
= intern ("font");
2012 staticpro (&Qstipple
);
2013 Qstipple
= intern ("stipple");
2014 staticpro (&Qunderline
);
2015 Qunderline
= intern ("underline");
2016 staticpro (&Qread_only
);
2017 Qread_only
= intern ("read-only");
2018 staticpro (&Qinvisible
);
2019 Qinvisible
= intern ("invisible");
2020 staticpro (&Qintangible
);
2021 Qintangible
= intern ("intangible");
2022 staticpro (&Qcategory
);
2023 Qcategory
= intern ("category");
2024 staticpro (&Qlocal_map
);
2025 Qlocal_map
= intern ("local-map");
2026 staticpro (&Qfront_sticky
);
2027 Qfront_sticky
= intern ("front-sticky");
2028 staticpro (&Qrear_nonsticky
);
2029 Qrear_nonsticky
= intern ("rear-nonsticky");
2030 staticpro (&Qmouse_face
);
2031 Qmouse_face
= intern ("mouse-face");
2033 /* Properties that text might use to specify certain actions */
2035 staticpro (&Qmouse_left
);
2036 Qmouse_left
= intern ("mouse-left");
2037 staticpro (&Qmouse_entered
);
2038 Qmouse_entered
= intern ("mouse-entered");
2039 staticpro (&Qpoint_left
);
2040 Qpoint_left
= intern ("point-left");
2041 staticpro (&Qpoint_entered
);
2042 Qpoint_entered
= intern ("point-entered");
2044 defsubr (&Stext_properties_at
);
2045 defsubr (&Sget_text_property
);
2046 defsubr (&Sget_char_property
);
2047 defsubr (&Snext_char_property_change
);
2048 defsubr (&Sprevious_char_property_change
);
2049 defsubr (&Snext_single_char_property_change
);
2050 defsubr (&Sprevious_single_char_property_change
);
2051 defsubr (&Snext_property_change
);
2052 defsubr (&Snext_single_property_change
);
2053 defsubr (&Sprevious_property_change
);
2054 defsubr (&Sprevious_single_property_change
);
2055 defsubr (&Sadd_text_properties
);
2056 defsubr (&Sput_text_property
);
2057 defsubr (&Sset_text_properties
);
2058 defsubr (&Sremove_text_properties
);
2059 defsubr (&Stext_property_any
);
2060 defsubr (&Stext_property_not_all
);
2061 /* defsubr (&Serase_text_properties); */
2062 /* defsubr (&Scopy_text_properties); */