1 /* Buffer insertion/deletion and gap motion for GNU Emacs.
2 Copyright (C) 1985, 86, 93, 94, 95, 97, 1998 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 #include "intervals.h"
28 #include "blockinput.h"
29 #include "region-cache.h"
35 #define min(x, y) ((x) < (y) ? (x) : (y))
37 static void insert_from_string_1
P_ ((Lisp_Object
, int, int, int, int, int, int));
38 static void insert_from_buffer_1 ();
39 static void gap_left
P_ ((int, int, int));
40 static void gap_right
P_ ((int, int));
41 static void adjust_markers_gap_motion
P_ ((int, int, int));
42 static void adjust_markers_for_insert
P_ ((int, int, int, int, int, int, int));
43 static void adjust_markers_for_delete
P_ ((int, int, int, int));
44 static void adjust_markers_for_record_delete
P_ ((int, int, int, int));
45 static void adjust_point
P_ ((int, int));
47 Lisp_Object
Fcombine_after_change_execute ();
49 /* Non-nil means don't call the after-change-functions right away,
50 just record an element in Vcombine_after_change_calls_list. */
51 Lisp_Object Vcombine_after_change_calls
;
53 /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT)
54 describing changes which happened while combine_after_change_calls
55 was nonzero. We use this to decide how to call them
56 once the deferral ends.
59 BEG-UNCHANGED is the number of chars before the changed range.
60 END-UNCHANGED is the number of chars after the changed range,
61 and CHANGE-AMOUNT is the number of characters inserted by the change
62 (negative for a deletion). */
63 Lisp_Object combine_after_change_list
;
65 /* Buffer which combine_after_change_list is about. */
66 Lisp_Object combine_after_change_buffer
;
68 /* Check all markers in the current buffer, looking for something invalid. */
70 static int check_markers_debug_flag
;
72 #define CHECK_MARKERS() \
73 if (check_markers_debug_flag) \
80 register Lisp_Object tail
, prev
, next
;
82 tail
= BUF_MARKERS (current_buffer
);
84 while (XSYMBOL (tail
) != XSYMBOL (Qnil
))
86 if (XMARKER (tail
)->buffer
->text
!= current_buffer
->text
)
88 if (XMARKER (tail
)->charpos
> Z
)
90 if (XMARKER (tail
)->bytepos
> Z_BYTE
)
93 tail
= XMARKER (tail
)->chain
;
97 /* Move gap to position CHARPOS.
98 Note that this can quit! */
104 move_gap_both (charpos
, charpos_to_bytepos (charpos
));
107 /* Move gap to byte position BYTEPOS, which is also char position CHARPOS.
108 Note that this can quit! */
111 move_gap_both (charpos
, bytepos
)
112 int charpos
, bytepos
;
114 if (bytepos
< GPT_BYTE
)
115 gap_left (charpos
, bytepos
, 0);
116 else if (bytepos
> GPT_BYTE
)
117 gap_right (charpos
, bytepos
);
120 /* Move the gap to a position less than the current GPT.
121 BYTEPOS describes the new position as a byte position,
122 and CHARPOS is the corresponding char position.
123 If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */
126 gap_left (charpos
, bytepos
, newgap
)
127 register int charpos
, bytepos
;
130 register unsigned char *to
, *from
;
136 if (unchanged_modified
== MODIFF
137 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
139 beg_unchanged
= charpos
- BEG
;
140 end_unchanged
= Z
- charpos
;
144 if (Z
- GPT
< end_unchanged
)
145 end_unchanged
= Z
- GPT
;
146 if (charpos
< beg_unchanged
)
147 beg_unchanged
= charpos
- BEG
;
156 /* Now copy the characters. To move the gap down,
157 copy characters up. */
161 /* I gets number of characters left to copy. */
162 i
= new_s1
- bytepos
;
165 /* If a quit is requested, stop copying now.
166 Change BYTEPOS to be where we have actually moved the gap to. */
170 charpos
= BYTE_TO_CHAR (bytepos
);
173 /* Move at most 32000 chars before checking again for a quit. */
178 /* bcopy is safe if the two areas of memory do not overlap
179 or on systems where bcopy is always safe for moving upward. */
180 && (BCOPY_UPWARD_SAFE
181 || to
- from
>= 128))
183 /* If overlap is not safe, avoid it by not moving too many
184 characters at once. */
185 if (!BCOPY_UPWARD_SAFE
&& i
> to
- from
)
200 /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS.
201 BYTEPOS is where the loop above stopped, which may be what was specified
202 or may be where a quit was detected. */
203 adjust_markers_gap_motion (bytepos
, GPT_BYTE
, GAP_SIZE
);
206 if (bytepos
< charpos
)
208 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
212 /* Move the gap to a position greater than than the current GPT.
213 BYTEPOS describes the new position as a byte position,
214 and CHARPOS is the corresponding char position. */
217 gap_right (charpos
, bytepos
)
218 register int charpos
, bytepos
;
220 register unsigned char *to
, *from
;
224 if (unchanged_modified
== MODIFF
225 && overlay_unchanged_modified
== OVERLAY_MODIFF
)
227 beg_unchanged
= charpos
- BEG
;
228 end_unchanged
= Z
- charpos
;
232 if (Z
- charpos
- 1 < end_unchanged
)
233 end_unchanged
= Z
- charpos
;
234 if (GPT
- BEG
< beg_unchanged
)
235 beg_unchanged
= GPT
- BEG
;
243 /* Now copy the characters. To move the gap up,
244 copy characters down. */
248 /* I gets number of characters left to copy. */
249 i
= bytepos
- new_s1
;
252 /* If a quit is requested, stop copying now.
253 Change BYTEPOS to be where we have actually moved the gap to. */
257 charpos
= BYTE_TO_CHAR (bytepos
);
260 /* Move at most 32000 chars before checking again for a quit. */
265 /* bcopy is safe if the two areas of memory do not overlap
266 or on systems where bcopy is always safe for moving downward. */
267 && (BCOPY_DOWNWARD_SAFE
268 || from
- to
>= 128))
270 /* If overlap is not safe, avoid it by not moving too many
271 characters at once. */
272 if (!BCOPY_DOWNWARD_SAFE
&& i
> from
- to
)
287 adjust_markers_gap_motion (GPT_BYTE
+ GAP_SIZE
, bytepos
+ GAP_SIZE
,
291 if (bytepos
< charpos
)
293 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
297 /* Add AMOUNT to the byte position of every marker in the current buffer
298 whose current byte position is between FROM (exclusive) and TO (inclusive).
300 Also, any markers past the outside of that interval, in the direction
301 of adjustment, are first moved back to the near end of the interval
302 and then adjusted by AMOUNT.
304 When the latter adjustment is done, if AMOUNT is negative,
305 we record the adjustment for undo. (This case happens only for
308 The markers' character positions are not altered,
309 because gap motion does not affect character positions. */
311 int adjust_markers_test
;
314 adjust_markers_gap_motion (from
, to
, amount
)
315 register int from
, to
, amount
;
317 /* Now that a marker has a bytepos, not counting the gap,
318 nothing needs to be done here. */
321 register struct Lisp_Marker
*m
;
324 marker
= BUF_MARKERS (current_buffer
);
326 while (!NILP (marker
))
328 m
= XMARKER (marker
);
332 if (mpos
> to
&& mpos
< to
+ amount
)
334 if (adjust_markers_test
)
341 /* Here's the case where a marker is inside text being deleted.
342 AMOUNT can be negative for gap motion, too,
343 but then this range contains no markers. */
344 if (mpos
> from
+ amount
&& mpos
<= from
)
346 if (adjust_markers_test
)
348 mpos
= from
+ amount
;
351 if (mpos
> from
&& mpos
<= to
)
359 /* Adjust all markers for a deletion
360 whose range in bytes is FROM_BYTE to TO_BYTE.
361 The range in charpos is FROM to TO.
363 This function assumes that the gap is adjacent to
364 or inside of the range being deleted. */
367 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
)
368 register int from
, from_byte
, to
, to_byte
;
371 register struct Lisp_Marker
*m
;
372 register int charpos
;
374 marker
= BUF_MARKERS (current_buffer
);
376 while (!NILP (marker
))
378 m
= XMARKER (marker
);
379 charpos
= m
->charpos
;
384 /* If the marker is after the deletion,
385 relocate by number of chars / bytes deleted. */
388 m
->charpos
-= to
- from
;
389 m
->bytepos
-= to_byte
- from_byte
;
392 /* Here's the case where a marker is inside text being deleted. */
393 else if (charpos
> from
)
395 record_marker_adjustment (marker
, from
- charpos
);
397 m
->bytepos
= from_byte
;
404 /* Adjust all markers for calling record_delete for combining bytes.
405 whose range in bytes is FROM_BYTE to TO_BYTE.
406 The range in charpos is FROM to TO. */
409 adjust_markers_for_record_delete (from
, from_byte
, to
, to_byte
)
410 register int from
, from_byte
, to
, to_byte
;
413 register struct Lisp_Marker
*m
;
414 register int charpos
;
416 marker
= BUF_MARKERS (current_buffer
);
418 while (!NILP (marker
))
420 m
= XMARKER (marker
);
421 charpos
= m
->charpos
;
423 /* If the marker is after the deletion,
424 relocate by number of chars / bytes deleted. */
427 /* Here's the case where a marker is inside text being deleted. */
428 else if (charpos
> from
)
429 record_marker_adjustment (marker
, from
- charpos
);
435 /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE
436 to TO / TO_BYTE. We have to relocate the charpos of every marker
437 that points after the insertion (but not their bytepos).
439 COMBINED_BEFORE_BYTES is the number of bytes at the start of the insertion
440 that combine into one character with the text before the insertion.
441 COMBINED_AFTER_BYTES is the number of bytes after the insertion
442 that combine into one character with the last inserted bytes.
444 When a marker points at the insertion point,
445 we advance it if either its insertion-type is t
446 or BEFORE_MARKERS is true. */
449 adjust_markers_for_insert (from
, from_byte
, to
, to_byte
,
450 combined_before_bytes
, combined_after_bytes
,
452 register int from
, from_byte
, to
, to_byte
;
453 int combined_before_bytes
, combined_after_bytes
, before_markers
;
457 int nchars
= to
- from
;
458 int nbytes
= to_byte
- from_byte
;
460 marker
= BUF_MARKERS (current_buffer
);
462 while (!NILP (marker
))
464 register struct Lisp_Marker
*m
= XMARKER (marker
);
466 /* In a single-byte buffer, a marker's two positions must be equal.
467 (If this insertion is going to combine characters, Z will
468 become different from Z_BYTE, but they might be the same now.
469 If so, the two OLD positions of the marker should be equal.) */
472 if (m
->charpos
!= m
->bytepos
)
476 if (m
->bytepos
== from_byte
)
478 if (m
->insertion_type
|| before_markers
)
480 m
->bytepos
+= nbytes
+ combined_after_bytes
;
481 m
->charpos
+= nchars
+ !!combined_after_bytes
;
482 /* Point the marker before the combined character,
483 so that undoing the insertion puts it back where it was. */
484 if (combined_after_bytes
)
485 DEC_BOTH (m
->charpos
, m
->bytepos
);
486 if (m
->insertion_type
)
489 else if (combined_before_bytes
)
491 /* This marker doesn't "need relocation",
492 but don't leave it pointing in the middle of a character.
493 Point the marker after the combined character,
494 so that undoing the insertion puts it back where it was. */
496 /* Here we depend on the fact that the gap is after
497 all of the combining bytes that we are going to skip over. */
498 DEC_BOTH (m
->charpos
, m
->bytepos
);
499 INC_BOTH (m
->charpos
, m
->bytepos
);
502 /* If a marker was pointing into the combining bytes
503 after the insertion, don't leave it there
504 in the middle of a character. */
505 else if (combined_after_bytes
&& m
->bytepos
>= from_byte
506 && m
->bytepos
< from_byte
+ combined_after_bytes
)
508 /* Put it after the combining bytes. */
509 m
->bytepos
= to_byte
+ combined_after_bytes
;
511 /* Now move it back before the combined character,
512 so that undoing the insertion will put it where it was. */
513 DEC_BOTH (m
->charpos
, m
->bytepos
);
515 else if (m
->bytepos
> from_byte
)
517 m
->bytepos
+= nbytes
;
518 m
->charpos
+= nchars
;
524 /* Adjusting only markers whose insertion-type is t may result in
525 disordered overlays in the slot `overlays_before'. */
527 fix_overlays_before (current_buffer
, from
, to
);
530 /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters.
532 This is used only when the value of point changes due to an insert
533 or delete; it does not represent a conceptual change in point as a
534 marker. In particular, point is not crossing any interval
535 boundaries, so there's no need to use the usual SET_PT macro. In
536 fact it would be incorrect to do so, because either the old or the
537 new value of point is out of sync with the current set of
541 adjust_point (nchars
, nbytes
)
544 BUF_PT (current_buffer
) += nchars
;
545 BUF_PT_BYTE (current_buffer
) += nbytes
;
547 /* In a single-byte buffer, the two positions must be equal. */
553 /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of
554 length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS
557 See the comment of adjust_markers_for_insert for the args
558 COMBINED_BEFORE_BYTES and COMBINED_AFTER_BYTES. */
561 adjust_markers_for_replace (from
, from_byte
, old_chars
, old_bytes
,
562 new_chars
, new_bytes
,
563 combined_before_bytes
, combined_after_bytes
)
564 int from
, from_byte
, old_chars
, old_bytes
, new_chars
, new_bytes
;
565 int combined_before_bytes
, combined_after_bytes
;
567 Lisp_Object marker
= BUF_MARKERS (current_buffer
);
568 int prev_to_byte
= from_byte
+ old_bytes
;
569 int diff_chars
= new_chars
- old_chars
;
570 int diff_bytes
= new_bytes
- old_bytes
;
572 while (!NILP (marker
))
574 register struct Lisp_Marker
*m
= XMARKER (marker
);
576 if (m
->bytepos
>= prev_to_byte
)
578 if (m
->bytepos
< prev_to_byte
+ combined_after_bytes
)
580 /* Put it after the combining bytes. */
581 m
->bytepos
= from_byte
+ new_bytes
;
582 m
->charpos
= from
+ new_chars
;
586 m
->charpos
+= diff_chars
;
587 m
->bytepos
+= diff_bytes
;
589 if (m
->charpos
== from
+ new_chars
)
590 record_marker_adjustment (marker
, - old_chars
);
592 else if (m
->bytepos
> from_byte
)
594 record_marker_adjustment (marker
, from
- m
->charpos
);
596 m
->bytepos
= from_byte
;
598 else if (m
->bytepos
== from_byte
)
600 if (combined_before_bytes
)
602 DEC_BOTH (m
->charpos
, m
->bytepos
);
603 INC_BOTH (m
->charpos
, m
->bytepos
);
612 /* Make the gap NBYTES_ADDED bytes longer. */
615 make_gap (nbytes_added
)
618 unsigned char *result
;
621 int real_gap_loc_byte
;
624 /* If we have to get more space, get enough to last a while. */
625 nbytes_added
+= 2000;
627 /* Don't allow a buffer size that won't fit in an int
628 even if it will fit in a Lisp integer.
629 That won't work because so many places use `int'. */
631 if (Z_BYTE
- BEG_BYTE
+ GAP_SIZE
+ nbytes_added
632 >= ((unsigned) 1 << (min (BITS_PER_INT
, VALBITS
) - 1)))
633 error ("Buffer exceeds maximum size");
636 /* We allocate extra 1-byte `\0' at the tail for anchoring a search. */
637 result
= BUFFER_REALLOC (BEG_ADDR
, (Z_BYTE
- BEG_BYTE
638 + GAP_SIZE
+ nbytes_added
+ 1));
646 /* We can't unblock until the new address is properly stored. */
650 /* Prevent quitting in move_gap. */
655 real_gap_loc_byte
= GPT_BYTE
;
656 old_gap_size
= GAP_SIZE
;
658 /* Call the newly allocated space a gap at the end of the whole space. */
660 GPT_BYTE
= Z_BYTE
+ GAP_SIZE
;
661 GAP_SIZE
= nbytes_added
;
663 /* Move the new gap down to be consecutive with the end of the old one.
664 This adjusts the markers properly too. */
665 gap_left (real_gap_loc
+ old_gap_size
, real_gap_loc_byte
+ old_gap_size
, 1);
667 /* Now combine the two into one large gap. */
668 GAP_SIZE
+= old_gap_size
;
670 GPT_BYTE
= real_gap_loc_byte
;
678 /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR.
679 FROM_MULTIBYTE says whether the incoming text is multibyte.
680 TO_MULTIBYTE says whether to store the text as multibyte.
681 If FROM_MULTIBYTE != TO_MULTIBYTE, we convert.
683 Return the number of bytes stored at TO_ADDR. */
686 copy_text (from_addr
, to_addr
, nbytes
,
687 from_multibyte
, to_multibyte
)
688 unsigned char *from_addr
;
689 unsigned char *to_addr
;
691 int from_multibyte
, to_multibyte
;
693 if (from_multibyte
== to_multibyte
)
695 bcopy (from_addr
, to_addr
, nbytes
);
698 else if (from_multibyte
)
701 int bytes_left
= nbytes
;
703 /* Convert multibyte to single byte. */
704 while (bytes_left
> 0)
707 c
= STRING_CHAR_AND_LENGTH (from_addr
, bytes_left
, thislen
);
708 *to_addr
++ = SINGLE_BYTE_CHAR_P (c
) ? c
: (c
& 0177) + 0200;
709 from_addr
+= thislen
;
710 bytes_left
-= thislen
;
717 unsigned char *initial_to_addr
= to_addr
;
719 /* Convert single-byte to multibyte. */
722 int c
= *from_addr
++;
723 unsigned char workbuf
[4], *str
;
726 if (c
>= 0240 && c
< 0400)
728 c
= unibyte_char_to_multibyte (c
);
729 len
= CHAR_STRING (c
, workbuf
, str
);
730 bcopy (str
, to_addr
, len
);
735 /* Special case for speed. */
736 *to_addr
++ = c
, nbytes
--;
738 return to_addr
- initial_to_addr
;
742 /* Return the number of bytes it would take
743 to convert some single-byte text to multibyte.
744 The single-byte text consists of NBYTES bytes at PTR. */
747 count_size_as_multibyte (ptr
, nbytes
)
752 int outgoing_nbytes
= 0;
754 for (i
= 0; i
< nbytes
; i
++)
756 unsigned int c
= *ptr
++;
762 c
= unibyte_char_to_multibyte (c
);
763 outgoing_nbytes
+= XINT (Fchar_bytes (make_number (c
)));
767 return outgoing_nbytes
;
770 /* Insert a string of specified length before point.
771 This function judges multibyteness based on
772 enable_multibyte_characters in the current buffer;
773 it never converts between single-byte and multibyte.
775 DO NOT use this for the contents of a Lisp string or a Lisp buffer!
776 prepare_to_modify_buffer could relocate the text. */
779 insert (string
, nbytes
)
780 register unsigned char *string
;
786 insert_1 (string
, nbytes
, 0, 1, 0);
787 signal_after_change (opoint
, 0, PT
- opoint
);
791 /* Likewise, but inherit text properties from neighboring characters. */
794 insert_and_inherit (string
, nbytes
)
795 register unsigned char *string
;
801 insert_1 (string
, nbytes
, 1, 1, 0);
802 signal_after_change (opoint
, 0, PT
- opoint
);
806 /* Insert the character C before point. Do not inherit text properties. */
812 unsigned char workbuf
[4], *str
;
815 if (! NILP (current_buffer
->enable_multibyte_characters
))
816 len
= CHAR_STRING (c
, workbuf
, str
);
827 /* Insert the null-terminated string S before point. */
833 insert (s
, strlen (s
));
836 /* Like `insert' except that all markers pointing at the place where
837 the insertion happens are adjusted to point after it.
838 Don't use this function to insert part of a Lisp string,
839 since gc could happen and relocate it. */
842 insert_before_markers (string
, nbytes
)
843 unsigned char *string
;
850 insert_1 (string
, nbytes
, 0, 1, 1);
851 signal_after_change (opoint
, 0, PT
- opoint
);
855 /* Likewise, but inherit text properties from neighboring characters. */
858 insert_before_markers_and_inherit (string
, nbytes
)
859 unsigned char *string
;
866 insert_1 (string
, nbytes
, 1, 1, 1);
867 signal_after_change (opoint
, 0, PT
- opoint
);
871 /* Subroutine used by the insert functions above. */
874 insert_1 (string
, nbytes
, inherit
, prepare
, before_markers
)
875 register unsigned char *string
;
877 int inherit
, prepare
, before_markers
;
879 insert_1_both (string
, chars_in_text (string
, nbytes
), nbytes
,
880 inherit
, prepare
, before_markers
);
883 /* See if the bytes before POS/POS_BYTE combine with bytes
884 at the start of STRING to form a single character.
885 If so, return the number of bytes at the start of STRING
886 which combine in this way. Otherwise, return 0. */
889 count_combining_before (string
, length
, pos
, pos_byte
)
890 unsigned char *string
;
894 int opos
= pos
, opos_byte
= pos_byte
;
896 unsigned char *p
= string
;
898 if (NILP (current_buffer
->enable_multibyte_characters
))
900 if (length
== 0 || CHAR_HEAD_P (*string
))
904 c
= FETCH_BYTE (pos_byte
- 1);
905 if (ASCII_BYTE_P (c
))
907 DEC_BOTH (pos
, pos_byte
);
908 c
= FETCH_BYTE (pos_byte
);
909 if (! BASE_LEADING_CODE_P (c
))
912 /* We have a combination situation.
913 Count the bytes at STRING that will combine. */
914 while (!CHAR_HEAD_P (*p
) && p
< string
+ length
)
920 /* See if the bytes after POS/POS_BYTE combine with bytes
921 at the end of STRING to form a single character.
922 If so, return the number of bytes after POS/POS_BYTE
923 which combine in this way. Otherwise, return 0. */
926 count_combining_after (string
, length
, pos
, pos_byte
)
927 unsigned char *string
;
931 int opos
= pos
, opos_byte
= pos_byte
;
935 if (NILP (current_buffer
->enable_multibyte_characters
))
937 if (length
== 0 || ASCII_BYTE_P (string
[length
- 1]))
940 while (i
> 0 && ! CHAR_HEAD_P (string
[i
]))
944 if (! BASE_LEADING_CODE_P (string
[i
]))
949 c
= FETCH_BYTE (pos_byte
);
952 while (pos_byte
< ZV_BYTE
)
954 c
= FETCH_BYTE (pos_byte
);
960 return pos_byte
- opos_byte
;
963 /* Adjust the position TARGET/TARGET_BYTE for the combining of NBYTES
964 following the position POS/POS_BYTE to the character preceding POS.
965 If TARGET is after POS+NBYTES, we only have to adjust the character
966 position TARGET, else, if TARGET is after POS, we have to adjust
967 both the character position TARGET and the byte position
968 TARGET_BYTE, else we don't have to do any adjustment. */
970 #define ADJUST_CHAR_POS(target, target_byte) \
972 if (target > pos + nbytes) \
974 else if (target >= pos) \
977 target_byte = pos_byte + nbytes; \
981 /* Combine NBYTES stray trailing-codes, which were formerly separate
982 characters, with the preceding character. These bytes
983 are located after position POS / POS_BYTE, and the preceding character
984 is located just before that position. */
987 combine_bytes (pos
, pos_byte
, nbytes
)
988 int pos
, pos_byte
, nbytes
;
990 /* Adjust all markers. */
991 adjust_markers_for_delete (pos
, pos_byte
, pos
+ nbytes
, pos_byte
);
993 adjust_overlays_for_delete (pos
, nbytes
);
995 ADJUST_CHAR_POS (BUF_PT (current_buffer
), BUF_PT_BYTE (current_buffer
));
996 ADJUST_CHAR_POS (GPT
, GPT_BYTE
);
997 ADJUST_CHAR_POS (Z
, Z_BYTE
);
998 ADJUST_CHAR_POS (ZV
, ZV_BYTE
);
1000 if (BUF_INTERVALS (current_buffer
) != 0)
1001 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
1002 offset_intervals (current_buffer
, pos
, - nbytes
);
1007 /* Insert a sequence of NCHARS chars which occupy NBYTES bytes
1008 starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS
1009 are the same as in insert_1. */
1012 insert_1_both (string
, nchars
, nbytes
, inherit
, prepare
, before_markers
)
1013 register unsigned char *string
;
1014 register int nchars
, nbytes
;
1015 int inherit
, prepare
, before_markers
;
1017 register Lisp_Object temp
, deletion
;
1018 int combined_before_bytes
, combined_after_bytes
;
1020 if (NILP (current_buffer
->enable_multibyte_characters
))
1024 move_gap_both (PT
, PT_BYTE
);
1025 if (GAP_SIZE
< nbytes
)
1026 make_gap (nbytes
- GAP_SIZE
);
1029 prepare_to_modify_buffer (PT
, PT
, NULL
);
1031 combined_before_bytes
1032 = count_combining_before (string
, nbytes
, PT
, PT_BYTE
);
1033 combined_after_bytes
1034 = count_combining_after (string
, nbytes
, PT
, PT_BYTE
);
1036 /* Record deletion of the surrounding text that combines with
1037 the insertion. This, together with recording the insertion,
1038 will add up to the right stuff in the undo list.
1040 But there is no need to actually delete the combining bytes
1041 from the buffer and reinsert them. */
1043 if (combined_after_bytes
)
1045 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1046 PT
+ combined_after_bytes
,
1047 PT_BYTE
+ combined_after_bytes
, 1);
1049 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1050 PT
+ combined_after_bytes
,
1051 PT_BYTE
+ combined_after_bytes
);
1052 record_delete (PT
, deletion
);
1055 if (combined_before_bytes
)
1057 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1059 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1061 record_delete (PT
- 1, deletion
);
1064 record_insert (PT
- !!combined_before_bytes
,
1065 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1068 bcopy (string
, GPT_ADDR
, nbytes
);
1071 /* When we have combining at the end of the insertion,
1072 this is the character position before the combined character. */
1079 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1081 if (combined_after_bytes
)
1082 move_gap_both (GPT
+ combined_after_bytes
,
1083 GPT_BYTE
+ combined_after_bytes
);
1088 adjust_overlays_for_insert (PT
, nchars
);
1089 adjust_markers_for_insert (PT
, PT_BYTE
,
1090 PT
+ nchars
, PT_BYTE
+ nbytes
,
1091 combined_before_bytes
, combined_after_bytes
,
1094 #ifdef USE_TEXT_PROPERTIES
1095 if (BUF_INTERVALS (current_buffer
) != 0)
1096 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
1097 offset_intervals (current_buffer
, PT
, nchars
);
1099 if (!inherit
&& BUF_INTERVALS (current_buffer
) != 0)
1100 Fset_text_properties (make_number (PT
), make_number (PT
+ nchars
),
1105 int pos
= PT
, pos_byte
= PT_BYTE
;
1107 adjust_point (nchars
+ combined_after_bytes
,
1108 nbytes
+ combined_after_bytes
);
1110 if (combined_after_bytes
)
1111 combine_bytes (pos
+ nchars
, pos_byte
+ nbytes
, combined_after_bytes
);
1113 if (combined_before_bytes
)
1114 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1118 /* Insert the part of the text of STRING, a Lisp object assumed to be
1119 of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes)
1120 starting at position POS / POS_BYTE. If the text of STRING has properties,
1121 copy them into the buffer.
1123 It does not work to use `insert' for this, because a GC could happen
1124 before we bcopy the stuff into the buffer, and relocate the string
1125 without insert noticing. */
1128 insert_from_string (string
, pos
, pos_byte
, length
, length_byte
, inherit
)
1130 register int pos
, pos_byte
, length
, length_byte
;
1134 insert_from_string_1 (string
, pos
, pos_byte
, length
, length_byte
,
1136 signal_after_change (opoint
, 0, PT
- opoint
);
1139 /* Like `insert_from_string' except that all markers pointing
1140 at the place where the insertion happens are adjusted to point after it. */
1143 insert_from_string_before_markers (string
, pos
, pos_byte
,
1144 length
, length_byte
, inherit
)
1146 register int pos
, pos_byte
, length
, length_byte
;
1150 insert_from_string_1 (string
, pos
, pos_byte
, length
, length_byte
,
1152 signal_after_change (opoint
, 0, PT
- opoint
);
1155 /* Subroutine of the insertion functions above. */
1158 insert_from_string_1 (string
, pos
, pos_byte
, nchars
, nbytes
,
1159 inherit
, before_markers
)
1161 register int pos
, pos_byte
, nchars
, nbytes
;
1162 int inherit
, before_markers
;
1164 register Lisp_Object temp
;
1165 struct gcpro gcpro1
;
1166 int outgoing_nbytes
= nbytes
;
1167 int combined_before_bytes
, combined_after_bytes
;
1168 int adjusted_nchars
;
1170 Lisp_Object deletion
;
1172 /* Make OUTGOING_NBYTES describe the text
1173 as it will be inserted in this buffer. */
1175 if (NILP (current_buffer
->enable_multibyte_characters
))
1176 outgoing_nbytes
= nchars
;
1177 else if (! STRING_MULTIBYTE (string
))
1179 = count_size_as_multibyte (&XSTRING (string
)->data
[pos_byte
],
1182 /* Make sure point-max won't overflow after this insertion. */
1183 XSETINT (temp
, outgoing_nbytes
+ Z
);
1184 if (outgoing_nbytes
+ Z
!= XINT (temp
))
1185 error ("Maximum buffer size exceeded");
1188 prepare_to_modify_buffer (PT
, PT
, NULL
);
1191 move_gap_both (PT
, PT_BYTE
);
1192 if (GAP_SIZE
< nbytes
)
1193 make_gap (outgoing_nbytes
- GAP_SIZE
);
1196 /* Copy the string text into the buffer, perhaps converting
1197 between single-byte and multibyte. */
1198 copy_text (XSTRING (string
)->data
+ pos_byte
, GPT_ADDR
, nbytes
,
1199 STRING_MULTIBYTE (string
),
1200 ! NILP (current_buffer
->enable_multibyte_characters
));
1202 /* We have copied text into the gap, but we have not altered
1203 PT or PT_BYTE yet. So we can pass PT and PT_BYTE
1204 to these functions and get the same results as we would
1205 have got earlier on. Meanwhile, PT_ADDR does point to
1206 the text that has been stored by copy_text. */
1208 combined_before_bytes
1209 = count_combining_before (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1210 combined_after_bytes
1211 = count_combining_after (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1213 /* Record deletion of the surrounding text that combines with
1214 the insertion. This, together with recording the insertion,
1215 will add up to the right stuff in the undo list.
1217 But there is no need to actually delete the combining bytes
1218 from the buffer and reinsert them. */
1220 if (combined_after_bytes
)
1222 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1223 PT
+ combined_after_bytes
,
1224 PT_BYTE
+ combined_after_bytes
, 1);
1226 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1227 PT
+ combined_after_bytes
,
1228 PT_BYTE
+ combined_after_bytes
);
1229 record_delete (PT
, deletion
);
1232 if (combined_before_bytes
)
1234 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1236 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1238 record_delete (PT
- 1, deletion
);
1241 record_insert (PT
- !!combined_before_bytes
,
1242 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1245 GAP_SIZE
-= outgoing_nbytes
;
1249 GPT_BYTE
+= outgoing_nbytes
;
1250 ZV_BYTE
+= outgoing_nbytes
;
1251 Z_BYTE
+= outgoing_nbytes
;
1252 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1254 if (combined_after_bytes
)
1255 move_gap_both (GPT
+ combined_after_bytes
,
1256 GPT_BYTE
+ combined_after_bytes
);
1261 adjust_overlays_for_insert (PT
, nchars
);
1262 adjust_markers_for_insert (PT
, PT_BYTE
, PT
+ nchars
,
1263 PT_BYTE
+ outgoing_nbytes
,
1264 combined_before_bytes
, combined_after_bytes
,
1267 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1268 offset_intervals (current_buffer
, PT
, nchars
);
1270 intervals
= XSTRING (string
)->intervals
;
1271 /* Get the intervals for the part of the string we are inserting--
1272 not including the combined-before bytes. */
1273 if (nbytes
< STRING_BYTES (XSTRING (string
)))
1274 intervals
= copy_intervals (intervals
, pos
, nchars
);
1276 /* Insert those intervals. */
1277 graft_intervals_into_buffer (intervals
, PT
, nchars
,
1278 current_buffer
, inherit
);
1281 int pos
= PT
, pos_byte
= PT_BYTE
;
1283 adjust_point (nchars
+ combined_after_bytes
,
1284 outgoing_nbytes
+ combined_after_bytes
);
1286 if (combined_after_bytes
)
1287 combine_bytes (pos
+ nchars
, pos_byte
+ outgoing_nbytes
,
1288 combined_after_bytes
);
1290 if (combined_before_bytes
)
1291 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1295 /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the
1296 current buffer. If the text in BUF has properties, they are absorbed
1297 into the current buffer.
1299 It does not work to use `insert' for this, because a malloc could happen
1300 and relocate BUF's text before the bcopy happens. */
1303 insert_from_buffer (buf
, charpos
, nchars
, inherit
)
1305 int charpos
, nchars
;
1310 insert_from_buffer_1 (buf
, charpos
, nchars
, inherit
);
1311 signal_after_change (opoint
, 0, PT
- opoint
);
1315 insert_from_buffer_1 (buf
, from
, nchars
, inherit
)
1320 register Lisp_Object temp
, deletion
;
1322 int from_byte
= buf_charpos_to_bytepos (buf
, from
);
1323 int to_byte
= buf_charpos_to_bytepos (buf
, from
+ nchars
);
1324 int incoming_nbytes
= to_byte
- from_byte
;
1325 int outgoing_nbytes
= incoming_nbytes
;
1326 int combined_before_bytes
, combined_after_bytes
;
1327 int adjusted_nchars
;
1330 /* Make OUTGOING_NBYTES describe the text
1331 as it will be inserted in this buffer. */
1333 if (NILP (current_buffer
->enable_multibyte_characters
))
1334 outgoing_nbytes
= nchars
;
1335 else if (NILP (buf
->enable_multibyte_characters
))
1337 = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf
, from_byte
),
1340 /* Make sure point-max won't overflow after this insertion. */
1341 XSETINT (temp
, outgoing_nbytes
+ Z
);
1342 if (outgoing_nbytes
+ Z
!= XINT (temp
))
1343 error ("Maximum buffer size exceeded");
1345 prepare_to_modify_buffer (PT
, PT
, NULL
);
1348 move_gap_both (PT
, PT_BYTE
);
1349 if (GAP_SIZE
< outgoing_nbytes
)
1350 make_gap (outgoing_nbytes
- GAP_SIZE
);
1352 if (from
< BUF_GPT (buf
))
1354 chunk
= BUF_GPT_BYTE (buf
) - from_byte
;
1355 if (chunk
> incoming_nbytes
)
1356 chunk
= incoming_nbytes
;
1357 copy_text (BUF_BYTE_ADDRESS (buf
, from_byte
),
1359 ! NILP (buf
->enable_multibyte_characters
),
1360 ! NILP (current_buffer
->enable_multibyte_characters
));
1364 if (chunk
< incoming_nbytes
)
1365 copy_text (BUF_BYTE_ADDRESS (buf
, from_byte
+ chunk
),
1366 GPT_ADDR
+ chunk
, incoming_nbytes
- chunk
,
1367 ! NILP (buf
->enable_multibyte_characters
),
1368 ! NILP (current_buffer
->enable_multibyte_characters
));
1370 /* We have copied text into the gap, but we have not altered
1371 PT or PT_BYTE yet. So we can pass PT and PT_BYTE
1372 to these functions and get the same results as we would
1373 have got earlier on. Meanwhile, GPT_ADDR does point to
1374 the text that has been stored by copy_text. */
1375 combined_before_bytes
1376 = count_combining_before (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1377 combined_after_bytes
1378 = count_combining_after (GPT_ADDR
, outgoing_nbytes
,
1381 /* Record deletion of the surrounding text that combines with
1382 the insertion. This, together with recording the insertion,
1383 will add up to the right stuff in the undo list.
1385 But there is no need to actually delete the combining bytes
1386 from the buffer and reinsert them. */
1388 if (combined_after_bytes
)
1390 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1391 PT
+ combined_after_bytes
,
1392 PT_BYTE
+ combined_after_bytes
, 1);
1394 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1395 PT
+ combined_after_bytes
,
1396 PT_BYTE
+ combined_after_bytes
);
1397 record_delete (PT
, deletion
);
1400 if (combined_before_bytes
)
1402 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1404 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1406 record_delete (PT
- 1, deletion
);
1409 record_insert (PT
- !!combined_before_bytes
,
1410 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1413 GAP_SIZE
-= outgoing_nbytes
;
1417 GPT_BYTE
+= outgoing_nbytes
;
1418 ZV_BYTE
+= outgoing_nbytes
;
1419 Z_BYTE
+= outgoing_nbytes
;
1420 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1422 if (combined_after_bytes
)
1423 move_gap_both (GPT
+ combined_after_bytes
,
1424 GPT_BYTE
+ combined_after_bytes
);
1429 adjust_overlays_for_insert (PT
, nchars
);
1430 adjust_markers_for_insert (PT
, PT_BYTE
, PT
+ nchars
,
1431 PT_BYTE
+ outgoing_nbytes
,
1432 combined_before_bytes
, combined_after_bytes
, 0);
1434 #ifdef USE_TEXT_PROPERTIES
1435 if (BUF_INTERVALS (current_buffer
) != 0)
1436 offset_intervals (current_buffer
, PT
, nchars
);
1439 /* Get the intervals for the part of the string we are inserting--
1440 not including the combined-before bytes. */
1441 intervals
= BUF_INTERVALS (buf
);
1442 if (outgoing_nbytes
< BUF_Z_BYTE (buf
) - BUF_BEG_BYTE (buf
))
1443 intervals
= copy_intervals (intervals
, from
, nchars
);
1445 /* Insert those intervals. */
1446 graft_intervals_into_buffer (intervals
, PT
, nchars
, current_buffer
, inherit
);
1449 int pos
= PT
, pos_byte
= PT_BYTE
;
1451 adjust_point (nchars
+ combined_after_bytes
,
1452 outgoing_nbytes
+ combined_after_bytes
);
1454 if (combined_after_bytes
)
1455 combine_bytes (pos
+ nchars
, pos_byte
+ outgoing_nbytes
,
1456 combined_after_bytes
);
1458 if (combined_before_bytes
)
1459 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1463 /* This function should be called after moving gap to FROM and before
1464 altering text between FROM and TO. This adjusts various position
1465 keepers and markers as if the text is deleted. Don't forget to
1466 call adjust_after_replace after you actually alter the text. */
1469 adjust_before_replace (from
, from_byte
, to
, to_byte
)
1470 int from
, from_byte
, to
, to_byte
;
1472 Lisp_Object deletion
;
1473 deletion
= make_buffer_string_both (from
, from_byte
, to
, to_byte
, 1);
1477 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
1478 record_delete (from
, deletion
);
1479 adjust_overlays_for_delete (from
, to
- from
);
1482 /* Record undo information and adjust markers and position keepers for
1483 a replacement of a text PREV_TEXT at FROM to a new text of LEN
1484 chars (LEN_BYTE bytes) which resides in the gap just after
1487 PREV_TEXT nil means the new text was just inserted. */
1490 adjust_after_replace (from
, from_byte
, prev_text
, len
, len_byte
)
1491 int from
, from_byte
, len
, len_byte
;
1492 Lisp_Object prev_text
;
1494 int combined_before_bytes
1495 = count_combining_before (GPT_ADDR
, len_byte
, from
, from_byte
);
1496 int combined_after_bytes
1497 = count_combining_after (GPT_ADDR
, len_byte
, from
, from_byte
);
1498 Lisp_Object deletion
;
1499 int nchars_del
= 0, nbytes_del
= 0;
1501 if (combined_after_bytes
)
1503 deletion
= make_buffer_string_both (from
, from_byte
,
1504 from
+ combined_after_bytes
,
1505 from_byte
+ combined_after_bytes
, 1);
1507 adjust_markers_for_record_delete (from
, from_byte
,
1508 from
+ combined_after_bytes
,
1509 from_byte
+ combined_after_bytes
);
1510 record_delete (from
, deletion
);
1513 if (combined_before_bytes
)
1515 deletion
= make_buffer_string_both (from
- 1, CHAR_TO_BYTE (from
- 1),
1516 from
, from_byte
, 1);
1517 adjust_markers_for_record_delete (from
- 1, CHAR_TO_BYTE (from
- 1),
1519 record_delete (from
- 1, deletion
);
1522 /* Update various buffer positions for the new text. */
1523 GAP_SIZE
-= len_byte
;
1525 ZV_BYTE
+= len_byte
; Z_BYTE
+= len_byte
;
1526 GPT
+= len
; GPT_BYTE
+= len_byte
;
1527 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1529 if (combined_after_bytes
)
1530 move_gap_both (GPT
+ combined_after_bytes
,
1531 GPT_BYTE
+ combined_after_bytes
);
1533 if (STRINGP (prev_text
))
1535 nchars_del
= XSTRING (prev_text
)->size
;
1536 nbytes_del
= STRING_BYTES (XSTRING (prev_text
));
1538 adjust_markers_for_replace (from
, from_byte
, nchars_del
, nbytes_del
,
1540 combined_before_bytes
, combined_after_bytes
);
1541 if (STRINGP (prev_text
))
1542 record_delete (from
, prev_text
);
1543 record_insert (from
- !!combined_before_bytes
,
1544 len
- combined_before_bytes
+ !!combined_before_bytes
);
1546 if (len
> nchars_del
)
1547 adjust_overlays_for_insert (from
, len
- nchars_del
);
1548 else if (len
< nchars_del
)
1549 adjust_overlays_for_delete (from
, nchars_del
- len
);
1550 #ifdef USE_TEXT_PROPERTIES
1551 if (BUF_INTERVALS (current_buffer
) != 0)
1552 offset_intervals (current_buffer
, from
, len
- nchars_del
);
1556 int pos
= PT
, pos_byte
= PT_BYTE
;
1559 adjust_point (len
- nchars_del
+ combined_after_bytes
,
1560 len_byte
- nbytes_del
+ combined_after_bytes
);
1561 else if (from
== PT
&& combined_before_bytes
)
1562 adjust_point (0, combined_before_bytes
);
1564 if (combined_after_bytes
)
1565 combine_bytes (from
+ len
, from_byte
+ len_byte
, combined_after_bytes
);
1567 if (combined_before_bytes
)
1568 combine_bytes (from
, from_byte
, combined_before_bytes
);
1574 evaporate_overlays (from
);
1578 /* Record undo information, adjust markers and position keepers for an
1579 insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The
1580 text already exists in the current buffer but character length (TO
1581 - FROM) may be incorrect, the correct length is NEWLEN. */
1584 adjust_after_insert (from
, from_byte
, to
, to_byte
, newlen
)
1585 int from
, from_byte
, to
, to_byte
, newlen
;
1587 int len
= to
- from
, len_byte
= to_byte
- from_byte
;
1590 move_gap_both (to
, to_byte
);
1591 GAP_SIZE
+= len_byte
;
1592 GPT
-= len
; GPT_BYTE
-= len_byte
;
1593 ZV
-= len
; ZV_BYTE
-= len_byte
;
1594 Z
-= len
; Z_BYTE
-= len_byte
;
1595 adjust_after_replace (from
, from_byte
, Qnil
, newlen
, len_byte
);
1598 /* Replace the text from character positions FROM to TO with NEW,
1599 If PREPARE is nonzero, call prepare_to_modify_buffer.
1600 If INHERIT, the newly inserted text should inherit text properties
1601 from the surrounding non-deleted text. */
1603 /* Note that this does not yet handle markers quite right.
1604 Also it needs to record a single undo-entry that does a replacement
1605 rather than a separate delete and insert.
1606 That way, undo will also handle markers properly. */
1609 replace_range (from
, to
, new, prepare
, inherit
, nomarkers
)
1611 int from
, to
, prepare
, inherit
, nomarkers
;
1613 int inschars
= XSTRING (new)->size
;
1614 int insbytes
= STRING_BYTES (XSTRING (new));
1615 int from_byte
, to_byte
;
1616 int nbytes_del
, nchars_del
;
1617 register Lisp_Object temp
;
1618 struct gcpro gcpro1
;
1619 int combined_before_bytes
, combined_after_bytes
;
1620 int adjusted_inschars
;
1622 int outgoing_insbytes
= insbytes
;
1623 Lisp_Object deletion
;
1631 int range_length
= to
- from
;
1632 prepare_to_modify_buffer (from
, to
, &from
);
1633 to
= from
+ range_length
;
1638 /* Make args be valid */
1644 from_byte
= CHAR_TO_BYTE (from
);
1645 to_byte
= CHAR_TO_BYTE (to
);
1647 nchars_del
= to
- from
;
1648 nbytes_del
= to_byte
- from_byte
;
1650 if (nbytes_del
<= 0 && insbytes
== 0)
1653 /* Make OUTGOING_INSBYTES describe the text
1654 as it will be inserted in this buffer. */
1656 if (NILP (current_buffer
->enable_multibyte_characters
))
1657 outgoing_insbytes
= inschars
;
1658 else if (! STRING_MULTIBYTE (new))
1660 = count_size_as_multibyte (XSTRING (new)->data
, insbytes
);
1662 /* Make sure point-max won't overflow after this insertion. */
1663 XSETINT (temp
, Z_BYTE
- nbytes_del
+ insbytes
);
1664 if (Z_BYTE
- nbytes_del
+ insbytes
!= XINT (temp
))
1665 error ("Maximum buffer size exceeded");
1669 /* Make sure the gap is somewhere in or next to what we are deleting. */
1671 gap_right (from
, from_byte
);
1673 gap_left (to
, to_byte
, 0);
1675 deletion
= make_buffer_string_both (from
, from_byte
, to
, to_byte
, 1);
1678 /* Relocate all markers pointing into the new, larger gap
1679 to point at the end of the text before the gap.
1680 Do this before recording the deletion,
1681 so that undo handles this after reinserting the text. */
1682 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
1684 record_delete (from
, deletion
);
1686 GAP_SIZE
+= nbytes_del
;
1689 ZV_BYTE
-= nbytes_del
;
1690 Z_BYTE
-= nbytes_del
;
1692 GPT_BYTE
= from_byte
;
1693 *(GPT_ADDR
) = 0; /* Put an anchor. */
1698 if (GPT
- BEG
< beg_unchanged
)
1699 beg_unchanged
= GPT
- BEG
;
1700 if (Z
- GPT
< end_unchanged
)
1701 end_unchanged
= Z
- GPT
;
1703 if (GAP_SIZE
< insbytes
)
1704 make_gap (insbytes
- GAP_SIZE
);
1706 /* Copy the string text into the buffer, perhaps converting
1707 between single-byte and multibyte. */
1708 copy_text (XSTRING (new)->data
, GPT_ADDR
, insbytes
,
1709 STRING_MULTIBYTE (new),
1710 ! NILP (current_buffer
->enable_multibyte_characters
));
1712 /* We have copied text into the gap, but we have not altered
1713 PT or PT_BYTE yet. So we can pass PT and PT_BYTE
1714 to these functions and get the same results as we would
1715 have got earlier on. Meanwhile, GPT_ADDR does point to
1716 the text that has been stored by copy_text. */
1718 combined_before_bytes
1719 = count_combining_before (GPT_ADDR
, outgoing_insbytes
, PT
, PT_BYTE
);
1720 combined_after_bytes
1721 = count_combining_after (GPT_ADDR
, outgoing_insbytes
, PT
, PT_BYTE
);
1723 /* Record deletion of the surrounding text that combines with
1724 the insertion. This, together with recording the insertion,
1725 will add up to the right stuff in the undo list.
1727 But there is no need to actually delete the combining bytes
1728 from the buffer and reinsert them. */
1730 if (combined_after_bytes
)
1732 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1733 PT
+ combined_after_bytes
,
1734 PT_BYTE
+ combined_after_bytes
, 1);
1736 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1737 PT
+ combined_after_bytes
,
1738 PT_BYTE
+ combined_after_bytes
);
1739 record_delete (PT
, deletion
);
1742 if (combined_before_bytes
)
1744 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1746 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1748 record_delete (PT
- 1, deletion
);
1751 record_insert (PT
- !!combined_before_bytes
,
1752 inschars
- combined_before_bytes
+ !!combined_before_bytes
);
1754 GAP_SIZE
-= outgoing_insbytes
;
1758 GPT_BYTE
+= outgoing_insbytes
;
1759 ZV_BYTE
+= outgoing_insbytes
;
1760 Z_BYTE
+= outgoing_insbytes
;
1761 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1763 if (combined_after_bytes
)
1764 move_gap_both (GPT
+ combined_after_bytes
,
1765 GPT_BYTE
+ combined_after_bytes
);
1770 /* Adjust the overlay center as needed. This must be done after
1771 adjusting the markers that bound the overlays. */
1772 adjust_overlays_for_delete (from
, nchars_del
);
1773 adjust_overlays_for_insert (from
, inschars
);
1775 adjust_markers_for_insert (from
, from_byte
,
1776 from
+ inschars
, from_byte
+ outgoing_insbytes
,
1777 combined_before_bytes
, combined_after_bytes
, 0);
1779 #ifdef USE_TEXT_PROPERTIES
1780 offset_intervals (current_buffer
, PT
, inschars
- nchars_del
);
1782 /* Get the intervals for the part of the string we are inserting--
1783 not including the combined-before bytes. */
1784 intervals
= XSTRING (new)->intervals
;
1785 /* Insert those intervals. */
1786 graft_intervals_into_buffer (intervals
, from
, inschars
,
1787 current_buffer
, inherit
);
1790 /* Relocate point as if it were a marker. */
1792 adjust_point ((from
+ inschars
- (PT
< to
? PT
: to
)
1793 + combined_after_bytes
),
1794 (from_byte
+ outgoing_insbytes
1795 - (PT_BYTE
< to_byte
? PT_BYTE
: to_byte
)
1796 + combined_after_bytes
));
1798 if (combined_after_bytes
)
1799 combine_bytes (from
+ inschars
, from_byte
+ outgoing_insbytes
,
1800 combined_after_bytes
);
1802 if (combined_before_bytes
)
1803 combine_bytes (from
, from_byte
, combined_before_bytes
);
1805 if (outgoing_insbytes
== 0)
1806 evaporate_overlays (from
);
1813 signal_after_change (from
, nchars_del
, PT
- from
);
1816 /* Delete characters in current buffer
1817 from FROM up to (but not including) TO.
1818 If TO comes before FROM, we delete nothing. */
1821 del_range (from
, to
)
1822 register int from
, to
;
1824 del_range_1 (from
, to
, 1);
1827 /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. */
1830 del_range_1 (from
, to
, prepare
)
1831 int from
, to
, prepare
;
1833 int from_byte
, to_byte
;
1835 /* Make args be valid */
1846 int range_length
= to
- from
;
1847 prepare_to_modify_buffer (from
, to
, &from
);
1848 to
= from
+ range_length
;
1851 from_byte
= CHAR_TO_BYTE (from
);
1852 to_byte
= CHAR_TO_BYTE (to
);
1854 del_range_2 (from
, from_byte
, to
, to_byte
);
1857 /* Like del_range_1 but args are byte positions, not char positions. */
1860 del_range_byte (from_byte
, to_byte
, prepare
)
1861 int from_byte
, to_byte
, prepare
;
1865 /* Make args be valid */
1866 if (from_byte
< BEGV_BYTE
)
1867 from_byte
= BEGV_BYTE
;
1868 if (to_byte
> ZV_BYTE
)
1871 if (to_byte
<= from_byte
)
1874 from
= BYTE_TO_CHAR (from_byte
);
1875 to
= BYTE_TO_CHAR (to_byte
);
1879 int old_from
= from
, old_to
= Z
- to
;
1880 int range_length
= to
- from
;
1881 prepare_to_modify_buffer (from
, to
, &from
);
1882 to
= from
+ range_length
;
1884 if (old_from
!= from
)
1885 from_byte
= CHAR_TO_BYTE (from
);
1886 if (old_to
== Z
- to
)
1887 to_byte
= CHAR_TO_BYTE (to
);
1890 del_range_2 (from
, from_byte
, to
, to_byte
);
1893 /* Like del_range_1, but positions are specified both as charpos
1897 del_range_both (from
, from_byte
, to
, to_byte
, prepare
)
1898 int from
, from_byte
, to
, to_byte
, prepare
;
1900 /* Make args be valid */
1901 if (from_byte
< BEGV_BYTE
)
1902 from_byte
= BEGV_BYTE
;
1903 if (to_byte
> ZV_BYTE
)
1906 if (to_byte
<= from_byte
)
1916 int old_from
= from
, old_to
= Z
- to
;
1917 int range_length
= to
- from
;
1918 prepare_to_modify_buffer (from
, to
, &from
);
1919 to
= from
+ range_length
;
1921 if (old_from
!= from
)
1922 from_byte
= CHAR_TO_BYTE (from
);
1923 if (old_to
== Z
- to
)
1924 to_byte
= CHAR_TO_BYTE (to
);
1927 del_range_2 (from
, from_byte
, to
, to_byte
);
1930 /* Delete a range of text, specified both as character positions
1931 and byte positions. FROM and TO are character positions,
1932 while FROM_BYTE and TO_BYTE are byte positions. */
1935 del_range_2 (from
, from_byte
, to
, to_byte
)
1936 int from
, from_byte
, to
, to_byte
;
1938 register int nbytes_del
, nchars_del
;
1939 int combined_after_bytes
;
1940 Lisp_Object deletion
;
1945 nchars_del
= to
- from
;
1946 nbytes_del
= to_byte
- from_byte
;
1948 /* Make sure the gap is somewhere in or next to what we are deleting. */
1950 gap_right (from
, from_byte
);
1952 gap_left (to
, to_byte
, 0);
1954 combined_after_bytes
1955 = count_combining_before (BUF_BYTE_ADDRESS (current_buffer
, to_byte
),
1956 ZV_BYTE
- to_byte
, from
, from_byte
);
1957 if (combined_after_bytes
)
1959 from_byte_1
= from_byte
;
1960 DEC_POS (from_byte_1
);
1963 from_byte_1
= from_byte
;
1966 = make_buffer_string_both (from
- !!combined_after_bytes
,
1968 to
+ combined_after_bytes
,
1969 to_byte
+ combined_after_bytes
, 1);
1970 if (combined_after_bytes
)
1971 /* COMBINED_AFTER_BYTES nonzero means that the above code moved
1972 the gap. We must move the gap again to a proper place. */
1973 move_gap_both (from
, from_byte
);
1975 /* Relocate all markers pointing into the new, larger gap
1976 to point at the end of the text before the gap.
1977 Do this before recording the deletion,
1978 so that undo handles this after reinserting the text. */
1979 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
1980 if (combined_after_bytes
)
1982 /* Adjust markers for the phony deletion
1983 that we are about to call record_undo for. */
1985 /* Here we delete the markers that formerly
1986 pointed at TO ... TO + COMBINED_AFTER_BYTES.
1987 But because of the call to adjust_markers_for_delete, above,
1988 they now point at FROM ... FROM + COMBINED_AFTER_BYTES. */
1989 adjust_markers_for_record_delete (from
, from_byte
,
1990 from
+ combined_after_bytes
,
1991 from_byte
+ combined_after_bytes
);
1993 adjust_markers_for_record_delete (from
- 1, from_byte_1
,
1996 record_delete (from
- !!combined_after_bytes
, deletion
);
1999 /* Relocate point as if it were a marker. */
2001 adjust_point (from
- (PT
< to
? PT
: to
),
2002 from_byte
- (PT_BYTE
< to_byte
? PT_BYTE
: to_byte
));
2004 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
2005 offset_intervals (current_buffer
, from
, - nchars_del
);
2007 /* Adjust the overlay center as needed. This must be done after
2008 adjusting the markers that bound the overlays. */
2009 adjust_overlays_for_delete (from
, nchars_del
);
2011 GAP_SIZE
+= nbytes_del
;
2012 ZV_BYTE
-= nbytes_del
;
2013 Z_BYTE
-= nbytes_del
;
2017 GPT_BYTE
= from_byte
;
2019 if (combined_after_bytes
)
2020 move_gap_both (GPT
+ combined_after_bytes
,
2021 GPT_BYTE
+ combined_after_bytes
);
2023 *(GPT_ADDR
) = 0; /* Put an anchor. */
2028 if (GPT
- BEG
< beg_unchanged
)
2029 beg_unchanged
= GPT
- BEG
;
2030 if (Z
- GPT
< end_unchanged
)
2031 end_unchanged
= Z
- GPT
;
2033 if (combined_after_bytes
)
2035 combine_bytes (from
, from_byte
, combined_after_bytes
);
2037 record_insert (GPT
- 1, 1);
2042 evaporate_overlays (from
);
2043 signal_after_change (from
, nchars_del
, 0);
2046 /* Call this if you're about to change the region of BUFFER from
2047 character positions START to END. This checks the read-only
2048 properties of the region, calls the necessary modification hooks,
2049 and warns the next redisplay that it should pay attention to that
2053 modify_region (buffer
, start
, end
)
2054 struct buffer
*buffer
;
2057 struct buffer
*old_buffer
= current_buffer
;
2059 if (buffer
!= old_buffer
)
2060 set_buffer_internal (buffer
);
2062 prepare_to_modify_buffer (start
, end
, NULL
);
2064 if (start
- 1 < beg_unchanged
2065 || (unchanged_modified
== MODIFF
2066 && overlay_unchanged_modified
== OVERLAY_MODIFF
))
2067 beg_unchanged
= start
- 1;
2068 if (Z
- end
< end_unchanged
2069 || (unchanged_modified
== MODIFF
2070 && overlay_unchanged_modified
== OVERLAY_MODIFF
))
2071 end_unchanged
= Z
- end
;
2073 if (MODIFF
<= SAVE_MODIFF
)
2074 record_first_change ();
2077 buffer
->point_before_scroll
= Qnil
;
2079 if (buffer
!= old_buffer
)
2080 set_buffer_internal (old_buffer
);
2083 /* Check that it is okay to modify the buffer between START and END,
2084 which are char positions.
2086 Run the before-change-function, if any. If intervals are in use,
2087 verify that the text to be modified is not read-only, and call
2088 any modification properties the text may have.
2090 If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
2091 by holding its value temporarily in a marker. */
2094 prepare_to_modify_buffer (start
, end
, preserve_ptr
)
2098 if (!NILP (current_buffer
->read_only
))
2099 Fbarf_if_buffer_read_only ();
2101 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
2102 if (BUF_INTERVALS (current_buffer
) != 0)
2106 Lisp_Object preserve_marker
;
2107 struct gcpro gcpro1
;
2108 preserve_marker
= Fcopy_marker (make_number (*preserve_ptr
), Qnil
);
2109 GCPRO1 (preserve_marker
);
2110 verify_interval_modification (current_buffer
, start
, end
);
2111 *preserve_ptr
= marker_position (preserve_marker
);
2112 unchain_marker (preserve_marker
);
2116 verify_interval_modification (current_buffer
, start
, end
);
2119 #ifdef CLASH_DETECTION
2120 if (!NILP (current_buffer
->file_truename
)
2121 /* Make binding buffer-file-name to nil effective. */
2122 && !NILP (current_buffer
->filename
)
2123 && SAVE_MODIFF
>= MODIFF
)
2124 lock_file (current_buffer
->file_truename
);
2126 /* At least warn if this file has changed on disk since it was visited. */
2127 if (!NILP (current_buffer
->filename
)
2128 && SAVE_MODIFF
>= MODIFF
2129 && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ()))
2130 && !NILP (Ffile_exists_p (current_buffer
->filename
)))
2131 call1 (intern ("ask-user-about-supersession-threat"),
2132 current_buffer
->filename
);
2133 #endif /* not CLASH_DETECTION */
2135 signal_before_change (start
, end
, preserve_ptr
);
2137 if (current_buffer
->newline_cache
)
2138 invalidate_region_cache (current_buffer
,
2139 current_buffer
->newline_cache
,
2140 start
- BEG
, Z
- end
);
2141 if (current_buffer
->width_run_cache
)
2142 invalidate_region_cache (current_buffer
,
2143 current_buffer
->width_run_cache
,
2144 start
- BEG
, Z
- end
);
2146 Vdeactivate_mark
= Qt
;
2149 /* These macros work with an argument named `preserve_ptr'
2150 and a local variable named `preserve_marker'. */
2152 #define PRESERVE_VALUE \
2153 if (preserve_ptr && NILP (preserve_marker)) \
2154 preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil)
2156 #define RESTORE_VALUE \
2157 if (! NILP (preserve_marker)) \
2159 *preserve_ptr = marker_position (preserve_marker); \
2160 unchain_marker (preserve_marker); \
2163 #define PRESERVE_START_END \
2164 if (NILP (start_marker)) \
2165 start_marker = Fcopy_marker (start, Qnil); \
2166 if (NILP (end_marker)) \
2167 end_marker = Fcopy_marker (end, Qnil);
2169 #define FETCH_START \
2170 (! NILP (start_marker) ? Fmarker_position (start_marker) : start)
2173 (! NILP (end_marker) ? Fmarker_position (end_marker) : end)
2175 /* Signal a change to the buffer immediately before it happens.
2176 START_INT and END_INT are the bounds of the text to be changed.
2178 If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
2179 by holding its value temporarily in a marker. */
2182 signal_before_change (start_int
, end_int
, preserve_ptr
)
2183 int start_int
, end_int
;
2186 Lisp_Object start
, end
;
2187 Lisp_Object start_marker
, end_marker
;
2188 Lisp_Object preserve_marker
;
2189 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2191 start
= make_number (start_int
);
2192 end
= make_number (end_int
);
2193 preserve_marker
= Qnil
;
2194 start_marker
= Qnil
;
2196 GCPRO3 (preserve_marker
, start_marker
, end_marker
);
2198 /* If buffer is unmodified, run a special hook for that case. */
2199 if (SAVE_MODIFF
>= MODIFF
2200 && !NILP (Vfirst_change_hook
)
2201 && !NILP (Vrun_hooks
))
2205 call1 (Vrun_hooks
, Qfirst_change_hook
);
2208 /* Run the before-change-function if any.
2209 We don't bother "binding" this variable to nil
2210 because it is obsolete anyway and new code should not use it. */
2211 if (!NILP (Vbefore_change_function
))
2215 call2 (Vbefore_change_function
, FETCH_START
, FETCH_END
);
2218 /* Now run the before-change-functions if any. */
2219 if (!NILP (Vbefore_change_functions
))
2221 Lisp_Object args
[3];
2222 Lisp_Object before_change_functions
;
2223 Lisp_Object after_change_functions
;
2224 struct gcpro gcpro1
, gcpro2
;
2229 /* "Bind" before-change-functions and after-change-functions
2230 to nil--but in a way that errors don't know about.
2231 That way, if there's an error in them, they will stay nil. */
2232 before_change_functions
= Vbefore_change_functions
;
2233 after_change_functions
= Vafter_change_functions
;
2234 Vbefore_change_functions
= Qnil
;
2235 Vafter_change_functions
= Qnil
;
2236 GCPRO2 (before_change_functions
, after_change_functions
);
2238 /* Actually run the hook functions. */
2239 args
[0] = Qbefore_change_functions
;
2240 args
[1] = FETCH_START
;
2241 args
[2] = FETCH_END
;
2242 run_hook_list_with_args (before_change_functions
, 3, args
);
2244 /* "Unbind" the variables we "bound" to nil. */
2245 Vbefore_change_functions
= before_change_functions
;
2246 Vafter_change_functions
= after_change_functions
;
2250 if (!NILP (current_buffer
->overlays_before
)
2251 || !NILP (current_buffer
->overlays_after
))
2254 report_overlay_modification (FETCH_START
, FETCH_END
, 0,
2255 FETCH_START
, FETCH_END
, Qnil
);
2258 if (! NILP (start_marker
))
2259 free_marker (start_marker
);
2260 if (! NILP (end_marker
))
2261 free_marker (end_marker
);
2266 /* Signal a change immediately after it happens.
2267 CHARPOS is the character position of the start of the changed text.
2268 LENDEL is the number of characters of the text before the change.
2269 (Not the whole buffer; just the part that was changed.)
2270 LENINS is the number of characters in that part of the text
2271 after the change. */
2274 signal_after_change (charpos
, lendel
, lenins
)
2275 int charpos
, lendel
, lenins
;
2277 /* If we are deferring calls to the after-change functions
2278 and there are no before-change functions,
2279 just record the args that we were going to use. */
2280 if (! NILP (Vcombine_after_change_calls
)
2281 && NILP (Vbefore_change_function
) && NILP (Vbefore_change_functions
)
2282 && NILP (current_buffer
->overlays_before
)
2283 && NILP (current_buffer
->overlays_after
))
2287 if (!NILP (combine_after_change_list
)
2288 && current_buffer
!= XBUFFER (combine_after_change_buffer
))
2289 Fcombine_after_change_execute ();
2291 elt
= Fcons (make_number (charpos
- BEG
),
2292 Fcons (make_number (Z
- (charpos
- lendel
+ lenins
)),
2293 Fcons (make_number (lenins
- lendel
), Qnil
)));
2294 combine_after_change_list
2295 = Fcons (elt
, combine_after_change_list
);
2296 combine_after_change_buffer
= Fcurrent_buffer ();
2301 if (!NILP (combine_after_change_list
))
2302 Fcombine_after_change_execute ();
2304 /* Run the after-change-function if any.
2305 We don't bother "binding" this variable to nil
2306 because it is obsolete anyway and new code should not use it. */
2307 if (!NILP (Vafter_change_function
))
2308 call3 (Vafter_change_function
,
2309 make_number (charpos
), make_number (charpos
+ lenins
),
2310 make_number (lendel
));
2312 if (!NILP (Vafter_change_functions
))
2314 Lisp_Object args
[4];
2315 Lisp_Object before_change_functions
;
2316 Lisp_Object after_change_functions
;
2317 struct gcpro gcpro1
, gcpro2
;
2319 /* "Bind" before-change-functions and after-change-functions
2320 to nil--but in a way that errors don't know about.
2321 That way, if there's an error in them, they will stay nil. */
2322 before_change_functions
= Vbefore_change_functions
;
2323 after_change_functions
= Vafter_change_functions
;
2324 Vbefore_change_functions
= Qnil
;
2325 Vafter_change_functions
= Qnil
;
2326 GCPRO2 (before_change_functions
, after_change_functions
);
2328 /* Actually run the hook functions. */
2329 args
[0] = Qafter_change_functions
;
2330 XSETFASTINT (args
[1], charpos
);
2331 XSETFASTINT (args
[2], charpos
+ lenins
);
2332 XSETFASTINT (args
[3], lendel
);
2333 run_hook_list_with_args (after_change_functions
,
2336 /* "Unbind" the variables we "bound" to nil. */
2337 Vbefore_change_functions
= before_change_functions
;
2338 Vafter_change_functions
= after_change_functions
;
2342 if (!NILP (current_buffer
->overlays_before
)
2343 || !NILP (current_buffer
->overlays_after
))
2344 report_overlay_modification (make_number (charpos
),
2345 make_number (charpos
+ lenins
),
2347 make_number (charpos
),
2348 make_number (charpos
+ lenins
),
2349 make_number (lendel
));
2351 /* After an insertion, call the text properties
2352 insert-behind-hooks or insert-in-front-hooks. */
2354 report_interval_modification (make_number (charpos
),
2355 make_number (charpos
+ lenins
));
2359 Fcombine_after_change_execute_1 (val
)
2362 Vcombine_after_change_calls
= val
;
2366 DEFUN ("combine-after-change-execute", Fcombine_after_change_execute
,
2367 Scombine_after_change_execute
, 0, 0, 0,
2368 "This function is for use internally in `combine-after-change-calls'.")
2371 register Lisp_Object val
;
2372 int count
= specpdl_ptr
- specpdl
;
2373 int beg
, end
, change
;
2377 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
2379 Fset_buffer (combine_after_change_buffer
);
2381 /* # chars unchanged at beginning of buffer. */
2383 /* # chars unchanged at end of buffer. */
2385 /* Total amount of insertion (negative for deletion). */
2388 /* Scan the various individual changes,
2389 accumulating the range info in BEG, END and CHANGE. */
2390 for (tail
= combine_after_change_list
; CONSP (tail
);
2391 tail
= XCONS (tail
)->cdr
)
2394 int thisbeg
, thisend
, thischange
;
2396 /* Extract the info from the next element. */
2397 elt
= XCONS (tail
)->car
;
2400 thisbeg
= XINT (XCONS (elt
)->car
);
2402 elt
= XCONS (elt
)->cdr
;
2405 thisend
= XINT (XCONS (elt
)->car
);
2407 elt
= XCONS (elt
)->cdr
;
2410 thischange
= XINT (XCONS (elt
)->car
);
2412 /* Merge this range into the accumulated range. */
2413 change
+= thischange
;
2420 /* Get the current start and end positions of the range
2421 that was changed. */
2425 /* We are about to handle these, so discard them. */
2426 combine_after_change_list
= Qnil
;
2428 /* Now run the after-change functions for real.
2429 Turn off the flag that defers them. */
2430 record_unwind_protect (Fcombine_after_change_execute_1
,
2431 Vcombine_after_change_calls
);
2432 signal_after_change (begpos
, endpos
- begpos
- change
, endpos
- begpos
);
2434 return unbind_to (count
, val
);
2440 staticpro (&combine_after_change_list
);
2441 combine_after_change_list
= Qnil
;
2443 DEFVAR_BOOL ("check-markers-debug-flag", &check_markers_debug_flag
,
2444 "Non-nil means enable debugging checks for invalid marker positions.");
2445 check_markers_debug_flag
= 0;
2446 DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls
,
2447 "Used internally by the `combine-after-change-calls' macro.");
2448 Vcombine_after_change_calls
= Qnil
;
2450 defsubr (&Scombine_after_change_execute
);