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
;
702 Lisp_Object tbl
= Qnil
, temp
;
704 /* We set the variable tbl to the reverse table of
705 Vnonascii_translation_table in advance. */
706 if (CHAR_TABLE_P (Vnonascii_translation_table
))
708 tbl
= Fchar_table_extra_slot (Vnonascii_translation_table
,
710 if (!CHAR_TABLE_P (tbl
))
714 /* Convert multibyte to single byte. */
715 while (bytes_left
> 0)
717 int thislen
, c
, c_save
;
718 c
= c_save
= STRING_CHAR_AND_LENGTH (from_addr
, bytes_left
, thislen
);
719 if (!SINGLE_BYTE_CHAR_P (c
))
720 c
= multibyte_char_to_unibyte (c
, tbl
);
722 from_addr
+= thislen
;
723 bytes_left
-= thislen
;
730 unsigned char *initial_to_addr
= to_addr
;
732 /* Convert single-byte to multibyte. */
735 int c
= *from_addr
++;
736 unsigned char workbuf
[4], *str
;
739 if (c
>= 0240 && c
< 0400)
741 c
= unibyte_char_to_multibyte (c
);
742 len
= CHAR_STRING (c
, workbuf
, str
);
743 bcopy (str
, to_addr
, len
);
748 /* Special case for speed. */
749 *to_addr
++ = c
, nbytes
--;
751 return to_addr
- initial_to_addr
;
755 /* Return the number of bytes it would take
756 to convert some single-byte text to multibyte.
757 The single-byte text consists of NBYTES bytes at PTR. */
760 count_size_as_multibyte (ptr
, nbytes
)
765 int outgoing_nbytes
= 0;
767 for (i
= 0; i
< nbytes
; i
++)
769 unsigned int c
= *ptr
++;
775 c
= unibyte_char_to_multibyte (c
);
776 outgoing_nbytes
+= XINT (Fchar_bytes (make_number (c
)));
780 return outgoing_nbytes
;
783 /* Insert a string of specified length before point.
784 This function judges multibyteness based on
785 enable_multibyte_characters in the current buffer;
786 it never converts between single-byte and multibyte.
788 DO NOT use this for the contents of a Lisp string or a Lisp buffer!
789 prepare_to_modify_buffer could relocate the text. */
792 insert (string
, nbytes
)
793 register unsigned char *string
;
799 insert_1 (string
, nbytes
, 0, 1, 0);
800 signal_after_change (opoint
, 0, PT
- opoint
);
804 /* Likewise, but inherit text properties from neighboring characters. */
807 insert_and_inherit (string
, nbytes
)
808 register unsigned char *string
;
814 insert_1 (string
, nbytes
, 1, 1, 0);
815 signal_after_change (opoint
, 0, PT
- opoint
);
819 /* Insert the character C before point. Do not inherit text properties. */
825 unsigned char workbuf
[4], *str
;
828 if (! NILP (current_buffer
->enable_multibyte_characters
))
829 len
= CHAR_STRING (c
, workbuf
, str
);
840 /* Insert the null-terminated string S before point. */
846 insert (s
, strlen (s
));
849 /* Like `insert' except that all markers pointing at the place where
850 the insertion happens are adjusted to point after it.
851 Don't use this function to insert part of a Lisp string,
852 since gc could happen and relocate it. */
855 insert_before_markers (string
, nbytes
)
856 unsigned char *string
;
863 insert_1 (string
, nbytes
, 0, 1, 1);
864 signal_after_change (opoint
, 0, PT
- opoint
);
868 /* Likewise, but inherit text properties from neighboring characters. */
871 insert_before_markers_and_inherit (string
, nbytes
)
872 unsigned char *string
;
879 insert_1 (string
, nbytes
, 1, 1, 1);
880 signal_after_change (opoint
, 0, PT
- opoint
);
884 /* Subroutine used by the insert functions above. */
887 insert_1 (string
, nbytes
, inherit
, prepare
, before_markers
)
888 register unsigned char *string
;
890 int inherit
, prepare
, before_markers
;
892 insert_1_both (string
, chars_in_text (string
, nbytes
), nbytes
,
893 inherit
, prepare
, before_markers
);
896 /* See if the bytes before POS/POS_BYTE combine with bytes
897 at the start of STRING to form a single character.
898 If so, return the number of bytes at the start of STRING
899 which combine in this way. Otherwise, return 0. */
902 count_combining_before (string
, length
, pos
, pos_byte
)
903 unsigned char *string
;
907 int opos
= pos
, opos_byte
= pos_byte
;
909 unsigned char *p
= string
;
911 if (NILP (current_buffer
->enable_multibyte_characters
))
913 if (length
== 0 || CHAR_HEAD_P (*string
))
917 c
= FETCH_BYTE (pos_byte
- 1);
918 if (ASCII_BYTE_P (c
))
920 DEC_BOTH (pos
, pos_byte
);
921 c
= FETCH_BYTE (pos_byte
);
922 if (! BASE_LEADING_CODE_P (c
))
925 /* We have a combination situation.
926 Count the bytes at STRING that will combine. */
927 while (!CHAR_HEAD_P (*p
) && p
< string
+ length
)
933 /* See if the bytes after POS/POS_BYTE combine with bytes
934 at the end of STRING to form a single character.
935 If so, return the number of bytes after POS/POS_BYTE
936 which combine in this way. Otherwise, return 0. */
939 count_combining_after (string
, length
, pos
, pos_byte
)
940 unsigned char *string
;
944 int opos
= pos
, opos_byte
= pos_byte
;
948 if (NILP (current_buffer
->enable_multibyte_characters
))
950 if (length
== 0 || ASCII_BYTE_P (string
[length
- 1]))
953 while (i
> 0 && ! CHAR_HEAD_P (string
[i
]))
957 if (! BASE_LEADING_CODE_P (string
[i
]))
962 c
= FETCH_BYTE (pos_byte
);
965 while (pos_byte
< ZV_BYTE
)
967 c
= FETCH_BYTE (pos_byte
);
973 return pos_byte
- opos_byte
;
976 /* Adjust the position TARGET/TARGET_BYTE for the combining of NBYTES
977 following the position POS/POS_BYTE to the character preceding POS.
978 If TARGET is after POS+NBYTES, we only have to adjust the character
979 position TARGET, else, if TARGET is after POS, we have to adjust
980 both the character position TARGET and the byte position
981 TARGET_BYTE, else we don't have to do any adjustment. */
983 #define ADJUST_CHAR_POS(target, target_byte) \
985 if (target > pos + nbytes) \
987 else if (target >= pos) \
990 target_byte = pos_byte + nbytes; \
994 /* Combine NBYTES stray trailing-codes, which were formerly separate
995 characters, with the preceding character. These bytes
996 are located after position POS / POS_BYTE, and the preceding character
997 is located just before that position. */
1000 combine_bytes (pos
, pos_byte
, nbytes
)
1001 int pos
, pos_byte
, nbytes
;
1003 /* Adjust all markers. */
1004 adjust_markers_for_delete (pos
, pos_byte
, pos
+ nbytes
, pos_byte
);
1006 adjust_overlays_for_delete (pos
, nbytes
);
1008 ADJUST_CHAR_POS (BUF_PT (current_buffer
), BUF_PT_BYTE (current_buffer
));
1009 ADJUST_CHAR_POS (GPT
, GPT_BYTE
);
1010 ADJUST_CHAR_POS (Z
, Z_BYTE
);
1011 ADJUST_CHAR_POS (ZV
, ZV_BYTE
);
1013 if (BUF_INTERVALS (current_buffer
) != 0)
1014 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
1015 offset_intervals (current_buffer
, pos
, - nbytes
);
1020 /* Insert a sequence of NCHARS chars which occupy NBYTES bytes
1021 starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS
1022 are the same as in insert_1. */
1025 insert_1_both (string
, nchars
, nbytes
, inherit
, prepare
, before_markers
)
1026 register unsigned char *string
;
1027 register int nchars
, nbytes
;
1028 int inherit
, prepare
, before_markers
;
1030 register Lisp_Object temp
;
1031 int combined_before_bytes
, combined_after_bytes
;
1033 if (NILP (current_buffer
->enable_multibyte_characters
))
1037 /* Do this before moving and increasing the gap,
1038 because the before-change hooks might move the gap
1039 or make it smaller. */
1040 prepare_to_modify_buffer (PT
, PT
, NULL
);
1043 move_gap_both (PT
, PT_BYTE
);
1044 if (GAP_SIZE
< nbytes
)
1045 make_gap (nbytes
- GAP_SIZE
);
1047 combined_before_bytes
1048 = count_combining_before (string
, nbytes
, PT
, PT_BYTE
);
1049 combined_after_bytes
1050 = count_combining_after (string
, nbytes
, PT
, PT_BYTE
);
1052 /* Record deletion of the surrounding text that combines with
1053 the insertion. This, together with recording the insertion,
1054 will add up to the right stuff in the undo list.
1056 But there is no need to actually delete the combining bytes
1057 from the buffer and reinsert them. */
1059 if (combined_after_bytes
)
1061 Lisp_Object deletion
;
1064 if (! EQ (current_buffer
->undo_list
, Qt
))
1065 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1066 PT
+ combined_after_bytes
,
1067 PT_BYTE
+ combined_after_bytes
, 1);
1069 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1070 PT
+ combined_after_bytes
,
1071 PT_BYTE
+ combined_after_bytes
);
1072 if (! EQ (current_buffer
->undo_list
, Qt
))
1073 record_delete (PT
, deletion
);
1076 if (combined_before_bytes
)
1078 Lisp_Object deletion
;
1081 if (! EQ (current_buffer
->undo_list
, Qt
))
1082 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1084 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1086 if (! EQ (current_buffer
->undo_list
, Qt
))
1087 record_delete (PT
- 1, deletion
);
1090 record_insert (PT
- !!combined_before_bytes
,
1091 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1094 bcopy (string
, GPT_ADDR
, nbytes
);
1097 /* When we have combining at the end of the insertion,
1098 this is the character position before the combined character. */
1105 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1107 if (combined_after_bytes
)
1108 move_gap_both (GPT
+ combined_after_bytes
,
1109 GPT_BYTE
+ combined_after_bytes
);
1114 adjust_overlays_for_insert (PT
, nchars
);
1115 adjust_markers_for_insert (PT
, PT_BYTE
,
1116 PT
+ nchars
, PT_BYTE
+ nbytes
,
1117 combined_before_bytes
, combined_after_bytes
,
1120 #ifdef USE_TEXT_PROPERTIES
1121 if (BUF_INTERVALS (current_buffer
) != 0)
1122 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
1123 offset_intervals (current_buffer
, PT
, nchars
);
1125 if (!inherit
&& BUF_INTERVALS (current_buffer
) != 0)
1126 Fset_text_properties (make_number (PT
), make_number (PT
+ nchars
),
1131 int pos
= PT
, pos_byte
= PT_BYTE
;
1133 adjust_point (nchars
+ combined_after_bytes
,
1134 nbytes
+ combined_after_bytes
);
1136 if (combined_after_bytes
)
1137 combine_bytes (pos
+ nchars
, pos_byte
+ nbytes
, combined_after_bytes
);
1139 if (combined_before_bytes
)
1140 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1144 /* Insert the part of the text of STRING, a Lisp object assumed to be
1145 of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes)
1146 starting at position POS / POS_BYTE. If the text of STRING has properties,
1147 copy them into the buffer.
1149 It does not work to use `insert' for this, because a GC could happen
1150 before we bcopy the stuff into the buffer, and relocate the string
1151 without insert noticing. */
1154 insert_from_string (string
, pos
, pos_byte
, length
, length_byte
, inherit
)
1156 register int pos
, pos_byte
, length
, length_byte
;
1160 insert_from_string_1 (string
, pos
, pos_byte
, length
, length_byte
,
1162 signal_after_change (opoint
, 0, PT
- opoint
);
1165 /* Like `insert_from_string' except that all markers pointing
1166 at the place where the insertion happens are adjusted to point after it. */
1169 insert_from_string_before_markers (string
, pos
, pos_byte
,
1170 length
, length_byte
, inherit
)
1172 register int pos
, pos_byte
, length
, length_byte
;
1176 insert_from_string_1 (string
, pos
, pos_byte
, length
, length_byte
,
1178 signal_after_change (opoint
, 0, PT
- opoint
);
1181 /* Subroutine of the insertion functions above. */
1184 insert_from_string_1 (string
, pos
, pos_byte
, nchars
, nbytes
,
1185 inherit
, before_markers
)
1187 register int pos
, pos_byte
, nchars
, nbytes
;
1188 int inherit
, before_markers
;
1190 register Lisp_Object temp
;
1191 struct gcpro gcpro1
;
1192 int outgoing_nbytes
= nbytes
;
1193 int combined_before_bytes
, combined_after_bytes
;
1194 int adjusted_nchars
;
1197 /* Make OUTGOING_NBYTES describe the text
1198 as it will be inserted in this buffer. */
1200 if (NILP (current_buffer
->enable_multibyte_characters
))
1201 outgoing_nbytes
= nchars
;
1202 else if (! STRING_MULTIBYTE (string
))
1204 = count_size_as_multibyte (&XSTRING (string
)->data
[pos_byte
],
1208 /* Do this before moving and increasing the gap,
1209 because the before-change hooks might move the gap
1210 or make it smaller. */
1211 prepare_to_modify_buffer (PT
, PT
, NULL
);
1214 move_gap_both (PT
, PT_BYTE
);
1215 if (GAP_SIZE
< nbytes
)
1216 make_gap (outgoing_nbytes
- GAP_SIZE
);
1219 /* Copy the string text into the buffer, perhaps converting
1220 between single-byte and multibyte. */
1221 copy_text (XSTRING (string
)->data
+ pos_byte
, GPT_ADDR
, nbytes
,
1222 STRING_MULTIBYTE (string
),
1223 ! NILP (current_buffer
->enable_multibyte_characters
));
1225 /* We have copied text into the gap, but we have not altered
1226 PT or PT_BYTE yet. So we can pass PT and PT_BYTE
1227 to these functions and get the same results as we would
1228 have got earlier on. Meanwhile, PT_ADDR does point to
1229 the text that has been stored by copy_text. */
1231 combined_before_bytes
1232 = count_combining_before (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1233 combined_after_bytes
1234 = count_combining_after (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1236 /* Record deletion of the surrounding text that combines with
1237 the insertion. This, together with recording the insertion,
1238 will add up to the right stuff in the undo list.
1240 But there is no need to actually delete the combining bytes
1241 from the buffer and reinsert them. */
1243 if (combined_after_bytes
)
1245 Lisp_Object deletion
;
1248 if (! EQ (current_buffer
->undo_list
, Qt
))
1249 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1250 PT
+ combined_after_bytes
,
1251 PT_BYTE
+ combined_after_bytes
, 1);
1253 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1254 PT
+ combined_after_bytes
,
1255 PT_BYTE
+ combined_after_bytes
);
1256 if (! EQ (current_buffer
->undo_list
, Qt
))
1257 record_delete (PT
, deletion
);
1260 if (combined_before_bytes
)
1262 Lisp_Object deletion
;
1265 if (! EQ (current_buffer
->undo_list
, Qt
))
1266 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1268 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1270 if (! EQ (current_buffer
->undo_list
, Qt
))
1271 record_delete (PT
- 1, deletion
);
1274 record_insert (PT
- !!combined_before_bytes
,
1275 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1278 GAP_SIZE
-= outgoing_nbytes
;
1282 GPT_BYTE
+= outgoing_nbytes
;
1283 ZV_BYTE
+= outgoing_nbytes
;
1284 Z_BYTE
+= outgoing_nbytes
;
1285 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1287 if (combined_after_bytes
)
1288 move_gap_both (GPT
+ combined_after_bytes
,
1289 GPT_BYTE
+ combined_after_bytes
);
1294 adjust_overlays_for_insert (PT
, nchars
);
1295 adjust_markers_for_insert (PT
, PT_BYTE
, PT
+ nchars
,
1296 PT_BYTE
+ outgoing_nbytes
,
1297 combined_before_bytes
, combined_after_bytes
,
1300 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1301 offset_intervals (current_buffer
, PT
, nchars
);
1303 intervals
= XSTRING (string
)->intervals
;
1304 /* Get the intervals for the part of the string we are inserting--
1305 not including the combined-before bytes. */
1306 if (nbytes
< STRING_BYTES (XSTRING (string
)))
1307 intervals
= copy_intervals (intervals
, pos
, nchars
);
1309 /* Insert those intervals. */
1310 graft_intervals_into_buffer (intervals
, PT
, nchars
,
1311 current_buffer
, inherit
);
1314 int pos
= PT
, pos_byte
= PT_BYTE
;
1316 adjust_point (nchars
+ combined_after_bytes
,
1317 outgoing_nbytes
+ combined_after_bytes
);
1319 if (combined_after_bytes
)
1320 combine_bytes (pos
+ nchars
, pos_byte
+ outgoing_nbytes
,
1321 combined_after_bytes
);
1323 if (combined_before_bytes
)
1324 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1328 /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the
1329 current buffer. If the text in BUF has properties, they are absorbed
1330 into the current buffer.
1332 It does not work to use `insert' for this, because a malloc could happen
1333 and relocate BUF's text before the bcopy happens. */
1336 insert_from_buffer (buf
, charpos
, nchars
, inherit
)
1338 int charpos
, nchars
;
1343 insert_from_buffer_1 (buf
, charpos
, nchars
, inherit
);
1344 signal_after_change (opoint
, 0, PT
- opoint
);
1348 insert_from_buffer_1 (buf
, from
, nchars
, inherit
)
1353 register Lisp_Object temp
;
1355 int from_byte
= buf_charpos_to_bytepos (buf
, from
);
1356 int to_byte
= buf_charpos_to_bytepos (buf
, from
+ nchars
);
1357 int incoming_nbytes
= to_byte
- from_byte
;
1358 int outgoing_nbytes
= incoming_nbytes
;
1359 int combined_before_bytes
, combined_after_bytes
;
1360 int adjusted_nchars
;
1363 /* Make OUTGOING_NBYTES describe the text
1364 as it will be inserted in this buffer. */
1366 if (NILP (current_buffer
->enable_multibyte_characters
))
1367 outgoing_nbytes
= nchars
;
1368 else if (NILP (buf
->enable_multibyte_characters
))
1370 = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf
, from_byte
),
1373 /* Make sure point-max won't overflow after this insertion. */
1374 XSETINT (temp
, outgoing_nbytes
+ Z
);
1375 if (outgoing_nbytes
+ Z
!= XINT (temp
))
1376 error ("Maximum buffer size exceeded");
1378 /* Do this before moving and increasing the gap,
1379 because the before-change hooks might move the gap
1380 or make it smaller. */
1381 prepare_to_modify_buffer (PT
, PT
, NULL
);
1384 move_gap_both (PT
, PT_BYTE
);
1385 if (GAP_SIZE
< outgoing_nbytes
)
1386 make_gap (outgoing_nbytes
- GAP_SIZE
);
1388 if (from
< BUF_GPT (buf
))
1390 chunk
= BUF_GPT_BYTE (buf
) - from_byte
;
1391 if (chunk
> incoming_nbytes
)
1392 chunk
= incoming_nbytes
;
1393 copy_text (BUF_BYTE_ADDRESS (buf
, from_byte
),
1395 ! NILP (buf
->enable_multibyte_characters
),
1396 ! NILP (current_buffer
->enable_multibyte_characters
));
1400 if (chunk
< incoming_nbytes
)
1401 copy_text (BUF_BYTE_ADDRESS (buf
, from_byte
+ chunk
),
1402 GPT_ADDR
+ chunk
, incoming_nbytes
- chunk
,
1403 ! NILP (buf
->enable_multibyte_characters
),
1404 ! NILP (current_buffer
->enable_multibyte_characters
));
1406 /* We have copied text into the gap, but we have not altered
1407 PT or PT_BYTE yet. So we can pass PT and PT_BYTE
1408 to these functions and get the same results as we would
1409 have got earlier on. Meanwhile, GPT_ADDR does point to
1410 the text that has been stored by copy_text. */
1411 combined_before_bytes
1412 = count_combining_before (GPT_ADDR
, outgoing_nbytes
, PT
, PT_BYTE
);
1413 combined_after_bytes
1414 = count_combining_after (GPT_ADDR
, outgoing_nbytes
,
1417 /* Record deletion of the surrounding text that combines with
1418 the insertion. This, together with recording the insertion,
1419 will add up to the right stuff in the undo list.
1421 But there is no need to actually delete the combining bytes
1422 from the buffer and reinsert them. */
1424 if (combined_after_bytes
)
1426 Lisp_Object deletion
;
1429 if (! EQ (current_buffer
->undo_list
, Qt
))
1430 deletion
= make_buffer_string_both (PT
, PT_BYTE
,
1431 PT
+ combined_after_bytes
,
1432 PT_BYTE
+ combined_after_bytes
, 1);
1434 adjust_markers_for_record_delete (PT
, PT_BYTE
,
1435 PT
+ combined_after_bytes
,
1436 PT_BYTE
+ combined_after_bytes
);
1437 if (! EQ (current_buffer
->undo_list
, Qt
))
1438 record_delete (PT
, deletion
);
1441 if (combined_before_bytes
)
1443 Lisp_Object deletion
;
1446 if (! EQ (current_buffer
->undo_list
, Qt
))
1447 deletion
= make_buffer_string_both (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1449 adjust_markers_for_record_delete (PT
- 1, CHAR_TO_BYTE (PT
- 1),
1451 if (! EQ (current_buffer
->undo_list
, Qt
))
1452 record_delete (PT
- 1, deletion
);
1455 record_insert (PT
- !!combined_before_bytes
,
1456 nchars
- combined_before_bytes
+ !!combined_before_bytes
);
1459 GAP_SIZE
-= outgoing_nbytes
;
1463 GPT_BYTE
+= outgoing_nbytes
;
1464 ZV_BYTE
+= outgoing_nbytes
;
1465 Z_BYTE
+= outgoing_nbytes
;
1466 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1468 if (combined_after_bytes
)
1469 move_gap_both (GPT
+ combined_after_bytes
,
1470 GPT_BYTE
+ combined_after_bytes
);
1475 adjust_overlays_for_insert (PT
, nchars
);
1476 adjust_markers_for_insert (PT
, PT_BYTE
, PT
+ nchars
,
1477 PT_BYTE
+ outgoing_nbytes
,
1478 combined_before_bytes
, combined_after_bytes
, 0);
1480 #ifdef USE_TEXT_PROPERTIES
1481 if (BUF_INTERVALS (current_buffer
) != 0)
1482 offset_intervals (current_buffer
, PT
, nchars
);
1485 /* Get the intervals for the part of the string we are inserting--
1486 not including the combined-before bytes. */
1487 intervals
= BUF_INTERVALS (buf
);
1488 if (outgoing_nbytes
< BUF_Z_BYTE (buf
) - BUF_BEG_BYTE (buf
))
1489 intervals
= copy_intervals (intervals
, from
, nchars
);
1491 /* Insert those intervals. */
1492 graft_intervals_into_buffer (intervals
, PT
, nchars
, current_buffer
, inherit
);
1495 int pos
= PT
, pos_byte
= PT_BYTE
;
1497 adjust_point (nchars
+ combined_after_bytes
,
1498 outgoing_nbytes
+ combined_after_bytes
);
1500 if (combined_after_bytes
)
1501 combine_bytes (pos
+ nchars
, pos_byte
+ outgoing_nbytes
,
1502 combined_after_bytes
);
1504 if (combined_before_bytes
)
1505 combine_bytes (pos
, pos_byte
, combined_before_bytes
);
1509 /* This function should be called after moving gap to FROM and before
1510 altering text between FROM and TO. This adjusts various position
1511 keepers and markers as if the text is deleted. Don't forget to
1512 call adjust_after_replace after you actually alter the text. */
1515 adjust_before_replace (from
, from_byte
, to
, to_byte
)
1516 int from
, from_byte
, to
, to_byte
;
1518 Lisp_Object deletion
;
1520 if (! EQ (current_buffer
->undo_list
, Qt
))
1521 deletion
= make_buffer_string_both (from
, from_byte
, to
, to_byte
, 1);
1525 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
1527 if (! EQ (current_buffer
->undo_list
, Qt
))
1528 record_delete (from
, deletion
);
1530 adjust_overlays_for_delete (from
, to
- from
);
1533 /* Record undo information and adjust markers and position keepers for
1534 a replacement of a text PREV_TEXT at FROM to a new text of LEN
1535 chars (LEN_BYTE bytes) which resides in the gap just after
1538 PREV_TEXT nil means the new text was just inserted. */
1541 adjust_after_replace (from
, from_byte
, prev_text
, len
, len_byte
)
1542 int from
, from_byte
, len
, len_byte
;
1543 Lisp_Object prev_text
;
1545 int combined_before_bytes
1546 = count_combining_before (GPT_ADDR
, len_byte
, from
, from_byte
);
1547 int combined_after_bytes
1548 = count_combining_after (GPT_ADDR
, len_byte
, from
, from_byte
);
1549 int nchars_del
= 0, nbytes_del
= 0;
1551 if (combined_after_bytes
)
1553 Lisp_Object deletion
;
1556 if (! EQ (current_buffer
->undo_list
, Qt
))
1557 deletion
= make_buffer_string_both (from
, from_byte
,
1558 from
+ combined_after_bytes
,
1559 from_byte
+ combined_after_bytes
,
1562 adjust_markers_for_record_delete (from
, from_byte
,
1563 from
+ combined_after_bytes
,
1564 from_byte
+ combined_after_bytes
);
1566 if (! EQ (current_buffer
->undo_list
, Qt
))
1567 record_delete (from
, deletion
);
1570 if (combined_before_bytes
)
1572 Lisp_Object deletion
;
1575 if (! EQ (current_buffer
->undo_list
, Qt
))
1576 deletion
= make_buffer_string_both (from
- 1, CHAR_TO_BYTE (from
- 1),
1577 from
, from_byte
, 1);
1578 adjust_markers_for_record_delete (from
- 1, CHAR_TO_BYTE (from
- 1),
1580 if (! EQ (current_buffer
->undo_list
, Qt
))
1581 record_delete (from
- 1, deletion
);
1584 /* Update various buffer positions for the new text. */
1585 GAP_SIZE
-= len_byte
;
1587 ZV_BYTE
+= len_byte
; Z_BYTE
+= len_byte
;
1588 GPT
+= len
; GPT_BYTE
+= len_byte
;
1589 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1591 if (combined_after_bytes
)
1592 move_gap_both (GPT
+ combined_after_bytes
,
1593 GPT_BYTE
+ combined_after_bytes
);
1595 if (STRINGP (prev_text
))
1597 nchars_del
= XSTRING (prev_text
)->size
;
1598 nbytes_del
= STRING_BYTES (XSTRING (prev_text
));
1600 adjust_markers_for_replace (from
, from_byte
, nchars_del
, nbytes_del
,
1602 combined_before_bytes
, combined_after_bytes
);
1603 if (STRINGP (prev_text
))
1604 record_delete (from
, prev_text
);
1605 record_insert (from
- !!combined_before_bytes
,
1606 len
- combined_before_bytes
+ !!combined_before_bytes
);
1608 if (len
> nchars_del
)
1609 adjust_overlays_for_insert (from
, len
- nchars_del
);
1610 else if (len
< nchars_del
)
1611 adjust_overlays_for_delete (from
, nchars_del
- len
);
1612 #ifdef USE_TEXT_PROPERTIES
1613 if (BUF_INTERVALS (current_buffer
) != 0)
1614 offset_intervals (current_buffer
, from
, len
- nchars_del
);
1618 int pos
= PT
, pos_byte
= PT_BYTE
;
1621 adjust_point (len
- nchars_del
+ combined_after_bytes
,
1622 len_byte
- nbytes_del
+ combined_after_bytes
);
1623 else if (from
== PT
&& combined_before_bytes
)
1624 adjust_point (0, combined_before_bytes
);
1626 if (combined_after_bytes
)
1627 combine_bytes (from
+ len
, from_byte
+ len_byte
, combined_after_bytes
);
1629 if (combined_before_bytes
)
1630 combine_bytes (from
, from_byte
, combined_before_bytes
);
1636 evaporate_overlays (from
);
1640 /* Record undo information, adjust markers and position keepers for an
1641 insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The
1642 text already exists in the current buffer but character length (TO
1643 - FROM) may be incorrect, the correct length is NEWLEN. */
1646 adjust_after_insert (from
, from_byte
, to
, to_byte
, newlen
)
1647 int from
, from_byte
, to
, to_byte
, newlen
;
1649 int len
= to
- from
, len_byte
= to_byte
- from_byte
;
1652 move_gap_both (to
, to_byte
);
1653 GAP_SIZE
+= len_byte
;
1654 GPT
-= len
; GPT_BYTE
-= len_byte
;
1655 ZV
-= len
; ZV_BYTE
-= len_byte
;
1656 Z
-= len
; Z_BYTE
-= len_byte
;
1657 adjust_after_replace (from
, from_byte
, Qnil
, newlen
, len_byte
);
1660 /* Replace the text from character positions FROM to TO with NEW,
1661 If PREPARE is nonzero, call prepare_to_modify_buffer.
1662 If INHERIT, the newly inserted text should inherit text properties
1663 from the surrounding non-deleted text. */
1665 /* Note that this does not yet handle markers quite right.
1666 Also it needs to record a single undo-entry that does a replacement
1667 rather than a separate delete and insert.
1668 That way, undo will also handle markers properly.
1670 But if MARKERS is 0, don't relocate markers. */
1673 replace_range (from
, to
, new, prepare
, inherit
, markers
)
1675 int from
, to
, prepare
, inherit
, markers
;
1677 int inschars
= XSTRING (new)->size
;
1678 int insbytes
= STRING_BYTES (XSTRING (new));
1679 int from_byte
, to_byte
;
1680 int nbytes_del
, nchars_del
;
1681 register Lisp_Object temp
;
1682 struct gcpro gcpro1
;
1683 int combined_before_bytes
, combined_after_bytes
;
1684 int adjusted_inschars
;
1686 int outgoing_insbytes
= insbytes
;
1694 int range_length
= to
- from
;
1695 prepare_to_modify_buffer (from
, to
, &from
);
1696 to
= from
+ range_length
;
1701 /* Make args be valid */
1707 from_byte
= CHAR_TO_BYTE (from
);
1708 to_byte
= CHAR_TO_BYTE (to
);
1710 nchars_del
= to
- from
;
1711 nbytes_del
= to_byte
- from_byte
;
1713 if (nbytes_del
<= 0 && insbytes
== 0)
1716 /* Make OUTGOING_INSBYTES describe the text
1717 as it will be inserted in this buffer. */
1719 if (NILP (current_buffer
->enable_multibyte_characters
))
1720 outgoing_insbytes
= inschars
;
1721 else if (! STRING_MULTIBYTE (new))
1723 = count_size_as_multibyte (XSTRING (new)->data
, insbytes
);
1725 /* Make sure point-max won't overflow after this insertion. */
1726 XSETINT (temp
, Z_BYTE
- nbytes_del
+ insbytes
);
1727 if (Z_BYTE
- nbytes_del
+ insbytes
!= XINT (temp
))
1728 error ("Maximum buffer size exceeded");
1732 /* Make sure the gap is somewhere in or next to what we are deleting. */
1734 gap_right (from
, from_byte
);
1736 gap_left (to
, to_byte
, 0);
1739 Lisp_Object deletion
;
1742 if (! EQ (current_buffer
->undo_list
, Qt
))
1743 deletion
= make_buffer_string_both (from
, from_byte
, to
, to_byte
, 1);
1746 /* Relocate all markers pointing into the new, larger gap
1747 to point at the end of the text before the gap.
1748 Do this before recording the deletion,
1749 so that undo handles this after reinserting the text. */
1750 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
1752 if (! EQ (current_buffer
->undo_list
, Qt
))
1753 record_delete (from
, deletion
);
1756 GAP_SIZE
+= nbytes_del
;
1759 ZV_BYTE
-= nbytes_del
;
1760 Z_BYTE
-= nbytes_del
;
1762 GPT_BYTE
= from_byte
;
1763 *(GPT_ADDR
) = 0; /* Put an anchor. */
1768 if (GPT
- BEG
< beg_unchanged
)
1769 beg_unchanged
= GPT
- BEG
;
1770 if (Z
- GPT
< end_unchanged
)
1771 end_unchanged
= Z
- GPT
;
1773 if (GAP_SIZE
< insbytes
)
1774 make_gap (insbytes
- GAP_SIZE
);
1776 /* Copy the string text into the buffer, perhaps converting
1777 between single-byte and multibyte. */
1778 copy_text (XSTRING (new)->data
, GPT_ADDR
, insbytes
,
1779 STRING_MULTIBYTE (new),
1780 ! NILP (current_buffer
->enable_multibyte_characters
));
1782 /* We have copied text into the gap, but we have not marked
1783 it as part of the buffer. So we can use the old FROM and FROM_BYTE
1784 here, for both the previous text and the following text.
1785 Meanwhile, GPT_ADDR does point to
1786 the text that has been stored by copy_text. */
1788 combined_before_bytes
1789 = count_combining_before (GPT_ADDR
, outgoing_insbytes
, from
, from_byte
);
1790 combined_after_bytes
1791 = count_combining_after (GPT_ADDR
, outgoing_insbytes
, from
, from_byte
);
1793 /* Record deletion of the surrounding text that combines with
1794 the insertion. This, together with recording the insertion,
1795 will add up to the right stuff in the undo list.
1797 But there is no need to actually delete the combining bytes
1798 from the buffer and reinsert them. */
1800 if (combined_after_bytes
)
1802 Lisp_Object deletion
;
1805 if (! EQ (current_buffer
->undo_list
, Qt
))
1806 deletion
= make_buffer_string_both (from
, from_byte
,
1807 from
+ combined_after_bytes
,
1808 from_byte
+ combined_after_bytes
, 1);
1810 adjust_markers_for_record_delete (from
, from_byte
,
1811 from
+ combined_after_bytes
,
1812 from_byte
+ combined_after_bytes
);
1813 if (! EQ (current_buffer
->undo_list
, Qt
))
1814 record_delete (from
, deletion
);
1817 if (combined_before_bytes
)
1819 Lisp_Object deletion
;
1822 if (! EQ (current_buffer
->undo_list
, Qt
))
1823 deletion
= make_buffer_string_both (from
- 1, CHAR_TO_BYTE (from
- 1),
1824 from
, from_byte
, 1);
1825 adjust_markers_for_record_delete (from
- 1, CHAR_TO_BYTE (from
- 1),
1827 if (! EQ (current_buffer
->undo_list
, Qt
))
1828 record_delete (from
- 1, deletion
);
1831 record_insert (from
- !!combined_before_bytes
,
1832 inschars
- combined_before_bytes
+ !!combined_before_bytes
);
1834 GAP_SIZE
-= outgoing_insbytes
;
1838 GPT_BYTE
+= outgoing_insbytes
;
1839 ZV_BYTE
+= outgoing_insbytes
;
1840 Z_BYTE
+= outgoing_insbytes
;
1841 if (GAP_SIZE
> 0) *(GPT_ADDR
) = 0; /* Put an anchor. */
1843 if (combined_after_bytes
)
1844 move_gap_both (GPT
+ combined_after_bytes
,
1845 GPT_BYTE
+ combined_after_bytes
);
1850 /* Adjust the overlay center as needed. This must be done after
1851 adjusting the markers that bound the overlays. */
1852 adjust_overlays_for_delete (from
, nchars_del
);
1853 adjust_overlays_for_insert (from
, inschars
);
1855 adjust_markers_for_insert (from
, from_byte
,
1856 from
+ inschars
, from_byte
+ outgoing_insbytes
,
1857 combined_before_bytes
, combined_after_bytes
, 0);
1859 #ifdef USE_TEXT_PROPERTIES
1860 offset_intervals (current_buffer
, from
, inschars
- nchars_del
);
1862 /* Get the intervals for the part of the string we are inserting--
1863 not including the combined-before bytes. */
1864 intervals
= XSTRING (new)->intervals
;
1865 /* Insert those intervals. */
1866 graft_intervals_into_buffer (intervals
, from
, inschars
,
1867 current_buffer
, inherit
);
1870 /* Relocate point as if it were a marker. */
1872 adjust_point ((from
+ inschars
- (PT
< to
? PT
: to
)
1873 + combined_after_bytes
),
1874 (from_byte
+ outgoing_insbytes
1875 - (PT_BYTE
< to_byte
? PT_BYTE
: to_byte
)
1876 + combined_after_bytes
));
1878 if (combined_after_bytes
)
1879 combine_bytes (from
+ inschars
, from_byte
+ outgoing_insbytes
,
1880 combined_after_bytes
);
1882 if (combined_before_bytes
)
1883 combine_bytes (from
, from_byte
, combined_before_bytes
);
1885 if (outgoing_insbytes
== 0)
1886 evaporate_overlays (from
);
1893 signal_after_change (from
, nchars_del
, GPT
- from
);
1896 /* Delete characters in current buffer
1897 from FROM up to (but not including) TO.
1898 If TO comes before FROM, we delete nothing. */
1901 del_range (from
, to
)
1902 register int from
, to
;
1904 del_range_1 (from
, to
, 1);
1907 /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. */
1910 del_range_1 (from
, to
, prepare
)
1911 int from
, to
, prepare
;
1913 int from_byte
, to_byte
;
1915 /* Make args be valid */
1926 int range_length
= to
- from
;
1927 prepare_to_modify_buffer (from
, to
, &from
);
1928 to
= from
+ range_length
;
1931 from_byte
= CHAR_TO_BYTE (from
);
1932 to_byte
= CHAR_TO_BYTE (to
);
1934 del_range_2 (from
, from_byte
, to
, to_byte
);
1937 /* Like del_range_1 but args are byte positions, not char positions. */
1940 del_range_byte (from_byte
, to_byte
, prepare
)
1941 int from_byte
, to_byte
, prepare
;
1945 /* Make args be valid */
1946 if (from_byte
< BEGV_BYTE
)
1947 from_byte
= BEGV_BYTE
;
1948 if (to_byte
> ZV_BYTE
)
1951 if (to_byte
<= from_byte
)
1954 from
= BYTE_TO_CHAR (from_byte
);
1955 to
= BYTE_TO_CHAR (to_byte
);
1959 int old_from
= from
, old_to
= Z
- to
;
1960 int range_length
= to
- from
;
1961 prepare_to_modify_buffer (from
, to
, &from
);
1962 to
= from
+ range_length
;
1964 if (old_from
!= from
)
1965 from_byte
= CHAR_TO_BYTE (from
);
1966 if (old_to
== Z
- to
)
1967 to_byte
= CHAR_TO_BYTE (to
);
1970 del_range_2 (from
, from_byte
, to
, to_byte
);
1973 /* Like del_range_1, but positions are specified both as charpos
1977 del_range_both (from
, from_byte
, to
, to_byte
, prepare
)
1978 int from
, from_byte
, to
, to_byte
, prepare
;
1980 /* Make args be valid */
1981 if (from_byte
< BEGV_BYTE
)
1982 from_byte
= BEGV_BYTE
;
1983 if (to_byte
> ZV_BYTE
)
1986 if (to_byte
<= from_byte
)
1996 int old_from
= from
, old_to
= Z
- to
;
1997 int range_length
= to
- from
;
1998 prepare_to_modify_buffer (from
, to
, &from
);
1999 to
= from
+ range_length
;
2001 if (old_from
!= from
)
2002 from_byte
= CHAR_TO_BYTE (from
);
2003 if (old_to
== Z
- to
)
2004 to_byte
= CHAR_TO_BYTE (to
);
2007 del_range_2 (from
, from_byte
, to
, to_byte
);
2010 /* Delete a range of text, specified both as character positions
2011 and byte positions. FROM and TO are character positions,
2012 while FROM_BYTE and TO_BYTE are byte positions. */
2015 del_range_2 (from
, from_byte
, to
, to_byte
)
2016 int from
, from_byte
, to
, to_byte
;
2018 register int nbytes_del
, nchars_del
;
2019 int combined_after_bytes
;
2020 Lisp_Object deletion
;
2025 nchars_del
= to
- from
;
2026 nbytes_del
= to_byte
- from_byte
;
2028 /* Make sure the gap is somewhere in or next to what we are deleting. */
2030 gap_right (from
, from_byte
);
2032 gap_left (to
, to_byte
, 0);
2034 combined_after_bytes
2035 = count_combining_before (BUF_BYTE_ADDRESS (current_buffer
, to_byte
),
2036 ZV_BYTE
- to_byte
, from
, from_byte
);
2037 if (combined_after_bytes
)
2039 from_byte_1
= from_byte
;
2040 DEC_POS (from_byte_1
);
2043 from_byte_1
= from_byte
;
2045 if (! EQ (current_buffer
->undo_list
, Qt
))
2047 = make_buffer_string_both (from
- !!combined_after_bytes
,
2049 to
+ combined_after_bytes
,
2050 to_byte
+ combined_after_bytes
, 1);
2051 if (combined_after_bytes
)
2052 /* COMBINED_AFTER_BYTES nonzero means that the above code moved
2053 the gap. We must move the gap again to a proper place. */
2054 move_gap_both (from
, from_byte
);
2056 /* Relocate all markers pointing into the new, larger gap
2057 to point at the end of the text before the gap.
2058 Do this before recording the deletion,
2059 so that undo handles this after reinserting the text. */
2060 adjust_markers_for_delete (from
, from_byte
, to
, to_byte
);
2061 if (combined_after_bytes
)
2063 /* Adjust markers for the phony deletion
2064 that we are about to call record_undo for. */
2066 /* Here we delete the markers that formerly
2067 pointed at TO ... TO + COMBINED_AFTER_BYTES.
2068 But because of the call to adjust_markers_for_delete, above,
2069 they now point at FROM ... FROM + COMBINED_AFTER_BYTES. */
2070 adjust_markers_for_record_delete (from
, from_byte
,
2071 from
+ combined_after_bytes
,
2072 from_byte
+ combined_after_bytes
);
2074 adjust_markers_for_record_delete (from
- 1, from_byte_1
,
2077 if (! EQ (current_buffer
->undo_list
, Qt
))
2078 record_delete (from
- !!combined_after_bytes
, deletion
);
2081 /* Relocate point as if it were a marker. */
2083 adjust_point (from
- (PT
< to
? PT
: to
),
2084 from_byte
- (PT_BYTE
< to_byte
? PT_BYTE
: to_byte
));
2086 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
2087 offset_intervals (current_buffer
, from
, - nchars_del
);
2089 /* Adjust the overlay center as needed. This must be done after
2090 adjusting the markers that bound the overlays. */
2091 adjust_overlays_for_delete (from
, nchars_del
);
2093 GAP_SIZE
+= nbytes_del
;
2094 ZV_BYTE
-= nbytes_del
;
2095 Z_BYTE
-= nbytes_del
;
2099 GPT_BYTE
= from_byte
;
2101 if (combined_after_bytes
)
2102 move_gap_both (GPT
+ combined_after_bytes
,
2103 GPT_BYTE
+ combined_after_bytes
);
2105 *(GPT_ADDR
) = 0; /* Put an anchor. */
2110 if (GPT
- BEG
< beg_unchanged
)
2111 beg_unchanged
= GPT
- BEG
;
2112 if (Z
- GPT
< end_unchanged
)
2113 end_unchanged
= Z
- GPT
;
2115 if (combined_after_bytes
)
2117 combine_bytes (from
, from_byte
, combined_after_bytes
);
2119 record_insert (GPT
- 1, 1);
2124 evaporate_overlays (from
);
2125 signal_after_change (from
, nchars_del
, 0);
2128 /* Call this if you're about to change the region of BUFFER from
2129 character positions START to END. This checks the read-only
2130 properties of the region, calls the necessary modification hooks,
2131 and warns the next redisplay that it should pay attention to that
2135 modify_region (buffer
, start
, end
)
2136 struct buffer
*buffer
;
2139 struct buffer
*old_buffer
= current_buffer
;
2141 if (buffer
!= old_buffer
)
2142 set_buffer_internal (buffer
);
2144 prepare_to_modify_buffer (start
, end
, NULL
);
2146 if (start
- 1 < beg_unchanged
2147 || (unchanged_modified
== MODIFF
2148 && overlay_unchanged_modified
== OVERLAY_MODIFF
))
2149 beg_unchanged
= start
- 1;
2150 if (Z
- end
< end_unchanged
2151 || (unchanged_modified
== MODIFF
2152 && overlay_unchanged_modified
== OVERLAY_MODIFF
))
2153 end_unchanged
= Z
- end
;
2155 if (MODIFF
<= SAVE_MODIFF
)
2156 record_first_change ();
2159 buffer
->point_before_scroll
= Qnil
;
2161 if (buffer
!= old_buffer
)
2162 set_buffer_internal (old_buffer
);
2165 /* Check that it is okay to modify the buffer between START and END,
2166 which are char positions.
2168 Run the before-change-function, if any. If intervals are in use,
2169 verify that the text to be modified is not read-only, and call
2170 any modification properties the text may have.
2172 If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
2173 by holding its value temporarily in a marker. */
2176 prepare_to_modify_buffer (start
, end
, preserve_ptr
)
2180 if (!NILP (current_buffer
->read_only
))
2181 Fbarf_if_buffer_read_only ();
2183 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
2184 if (BUF_INTERVALS (current_buffer
) != 0)
2188 Lisp_Object preserve_marker
;
2189 struct gcpro gcpro1
;
2190 preserve_marker
= Fcopy_marker (make_number (*preserve_ptr
), Qnil
);
2191 GCPRO1 (preserve_marker
);
2192 verify_interval_modification (current_buffer
, start
, end
);
2193 *preserve_ptr
= marker_position (preserve_marker
);
2194 unchain_marker (preserve_marker
);
2198 verify_interval_modification (current_buffer
, start
, end
);
2201 #ifdef CLASH_DETECTION
2202 if (!NILP (current_buffer
->file_truename
)
2203 /* Make binding buffer-file-name to nil effective. */
2204 && !NILP (current_buffer
->filename
)
2205 && SAVE_MODIFF
>= MODIFF
)
2206 lock_file (current_buffer
->file_truename
);
2208 /* At least warn if this file has changed on disk since it was visited. */
2209 if (!NILP (current_buffer
->filename
)
2210 && SAVE_MODIFF
>= MODIFF
2211 && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ()))
2212 && !NILP (Ffile_exists_p (current_buffer
->filename
)))
2213 call1 (intern ("ask-user-about-supersession-threat"),
2214 current_buffer
->filename
);
2215 #endif /* not CLASH_DETECTION */
2217 signal_before_change (start
, end
, preserve_ptr
);
2219 if (current_buffer
->newline_cache
)
2220 invalidate_region_cache (current_buffer
,
2221 current_buffer
->newline_cache
,
2222 start
- BEG
, Z
- end
);
2223 if (current_buffer
->width_run_cache
)
2224 invalidate_region_cache (current_buffer
,
2225 current_buffer
->width_run_cache
,
2226 start
- BEG
, Z
- end
);
2228 Vdeactivate_mark
= Qt
;
2231 /* These macros work with an argument named `preserve_ptr'
2232 and a local variable named `preserve_marker'. */
2234 #define PRESERVE_VALUE \
2235 if (preserve_ptr && NILP (preserve_marker)) \
2236 preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil)
2238 #define RESTORE_VALUE \
2239 if (! NILP (preserve_marker)) \
2241 *preserve_ptr = marker_position (preserve_marker); \
2242 unchain_marker (preserve_marker); \
2245 #define PRESERVE_START_END \
2246 if (NILP (start_marker)) \
2247 start_marker = Fcopy_marker (start, Qnil); \
2248 if (NILP (end_marker)) \
2249 end_marker = Fcopy_marker (end, Qnil);
2251 #define FETCH_START \
2252 (! NILP (start_marker) ? Fmarker_position (start_marker) : start)
2255 (! NILP (end_marker) ? Fmarker_position (end_marker) : end)
2257 /* Signal a change to the buffer immediately before it happens.
2258 START_INT and END_INT are the bounds of the text to be changed.
2260 If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
2261 by holding its value temporarily in a marker. */
2264 signal_before_change (start_int
, end_int
, preserve_ptr
)
2265 int start_int
, end_int
;
2268 Lisp_Object start
, end
;
2269 Lisp_Object start_marker
, end_marker
;
2270 Lisp_Object preserve_marker
;
2271 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2273 start
= make_number (start_int
);
2274 end
= make_number (end_int
);
2275 preserve_marker
= Qnil
;
2276 start_marker
= Qnil
;
2278 GCPRO3 (preserve_marker
, start_marker
, end_marker
);
2280 /* If buffer is unmodified, run a special hook for that case. */
2281 if (SAVE_MODIFF
>= MODIFF
2282 && !NILP (Vfirst_change_hook
)
2283 && !NILP (Vrun_hooks
))
2287 call1 (Vrun_hooks
, Qfirst_change_hook
);
2290 /* Run the before-change-function if any.
2291 We don't bother "binding" this variable to nil
2292 because it is obsolete anyway and new code should not use it. */
2293 if (!NILP (Vbefore_change_function
))
2297 call2 (Vbefore_change_function
, FETCH_START
, FETCH_END
);
2300 /* Now run the before-change-functions if any. */
2301 if (!NILP (Vbefore_change_functions
))
2303 Lisp_Object args
[3];
2304 Lisp_Object before_change_functions
;
2305 Lisp_Object after_change_functions
;
2306 struct gcpro gcpro1
, gcpro2
;
2311 /* "Bind" before-change-functions and after-change-functions
2312 to nil--but in a way that errors don't know about.
2313 That way, if there's an error in them, they will stay nil. */
2314 before_change_functions
= Vbefore_change_functions
;
2315 after_change_functions
= Vafter_change_functions
;
2316 Vbefore_change_functions
= Qnil
;
2317 Vafter_change_functions
= Qnil
;
2318 GCPRO2 (before_change_functions
, after_change_functions
);
2320 /* Actually run the hook functions. */
2321 args
[0] = Qbefore_change_functions
;
2322 args
[1] = FETCH_START
;
2323 args
[2] = FETCH_END
;
2324 run_hook_list_with_args (before_change_functions
, 3, args
);
2326 /* "Unbind" the variables we "bound" to nil. */
2327 Vbefore_change_functions
= before_change_functions
;
2328 Vafter_change_functions
= after_change_functions
;
2332 if (!NILP (current_buffer
->overlays_before
)
2333 || !NILP (current_buffer
->overlays_after
))
2336 report_overlay_modification (FETCH_START
, FETCH_END
, 0,
2337 FETCH_START
, FETCH_END
, Qnil
);
2340 if (! NILP (start_marker
))
2341 free_marker (start_marker
);
2342 if (! NILP (end_marker
))
2343 free_marker (end_marker
);
2348 /* Signal a change immediately after it happens.
2349 CHARPOS is the character position of the start of the changed text.
2350 LENDEL is the number of characters of the text before the change.
2351 (Not the whole buffer; just the part that was changed.)
2352 LENINS is the number of characters in that part of the text
2353 after the change. */
2356 signal_after_change (charpos
, lendel
, lenins
)
2357 int charpos
, lendel
, lenins
;
2359 /* If we are deferring calls to the after-change functions
2360 and there are no before-change functions,
2361 just record the args that we were going to use. */
2362 if (! NILP (Vcombine_after_change_calls
)
2363 && NILP (Vbefore_change_function
) && NILP (Vbefore_change_functions
)
2364 && NILP (current_buffer
->overlays_before
)
2365 && NILP (current_buffer
->overlays_after
))
2369 if (!NILP (combine_after_change_list
)
2370 && current_buffer
!= XBUFFER (combine_after_change_buffer
))
2371 Fcombine_after_change_execute ();
2373 elt
= Fcons (make_number (charpos
- BEG
),
2374 Fcons (make_number (Z
- (charpos
- lendel
+ lenins
)),
2375 Fcons (make_number (lenins
- lendel
), Qnil
)));
2376 combine_after_change_list
2377 = Fcons (elt
, combine_after_change_list
);
2378 combine_after_change_buffer
= Fcurrent_buffer ();
2383 if (!NILP (combine_after_change_list
))
2384 Fcombine_after_change_execute ();
2386 /* Run the after-change-function if any.
2387 We don't bother "binding" this variable to nil
2388 because it is obsolete anyway and new code should not use it. */
2389 if (!NILP (Vafter_change_function
))
2390 call3 (Vafter_change_function
,
2391 make_number (charpos
), make_number (charpos
+ lenins
),
2392 make_number (lendel
));
2394 if (!NILP (Vafter_change_functions
))
2396 Lisp_Object args
[4];
2397 Lisp_Object before_change_functions
;
2398 Lisp_Object after_change_functions
;
2399 struct gcpro gcpro1
, gcpro2
;
2401 /* "Bind" before-change-functions and after-change-functions
2402 to nil--but in a way that errors don't know about.
2403 That way, if there's an error in them, they will stay nil. */
2404 before_change_functions
= Vbefore_change_functions
;
2405 after_change_functions
= Vafter_change_functions
;
2406 Vbefore_change_functions
= Qnil
;
2407 Vafter_change_functions
= Qnil
;
2408 GCPRO2 (before_change_functions
, after_change_functions
);
2410 /* Actually run the hook functions. */
2411 args
[0] = Qafter_change_functions
;
2412 XSETFASTINT (args
[1], charpos
);
2413 XSETFASTINT (args
[2], charpos
+ lenins
);
2414 XSETFASTINT (args
[3], lendel
);
2415 run_hook_list_with_args (after_change_functions
,
2418 /* "Unbind" the variables we "bound" to nil. */
2419 Vbefore_change_functions
= before_change_functions
;
2420 Vafter_change_functions
= after_change_functions
;
2424 if (!NILP (current_buffer
->overlays_before
)
2425 || !NILP (current_buffer
->overlays_after
))
2426 report_overlay_modification (make_number (charpos
),
2427 make_number (charpos
+ lenins
),
2429 make_number (charpos
),
2430 make_number (charpos
+ lenins
),
2431 make_number (lendel
));
2433 /* After an insertion, call the text properties
2434 insert-behind-hooks or insert-in-front-hooks. */
2436 report_interval_modification (make_number (charpos
),
2437 make_number (charpos
+ lenins
));
2441 Fcombine_after_change_execute_1 (val
)
2444 Vcombine_after_change_calls
= val
;
2448 DEFUN ("combine-after-change-execute", Fcombine_after_change_execute
,
2449 Scombine_after_change_execute
, 0, 0, 0,
2450 "This function is for use internally in `combine-after-change-calls'.")
2453 register Lisp_Object val
;
2454 int count
= specpdl_ptr
- specpdl
;
2455 int beg
, end
, change
;
2459 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
2461 Fset_buffer (combine_after_change_buffer
);
2463 /* # chars unchanged at beginning of buffer. */
2465 /* # chars unchanged at end of buffer. */
2467 /* Total amount of insertion (negative for deletion). */
2470 /* Scan the various individual changes,
2471 accumulating the range info in BEG, END and CHANGE. */
2472 for (tail
= combine_after_change_list
; CONSP (tail
);
2473 tail
= XCONS (tail
)->cdr
)
2476 int thisbeg
, thisend
, thischange
;
2478 /* Extract the info from the next element. */
2479 elt
= XCONS (tail
)->car
;
2482 thisbeg
= XINT (XCONS (elt
)->car
);
2484 elt
= XCONS (elt
)->cdr
;
2487 thisend
= XINT (XCONS (elt
)->car
);
2489 elt
= XCONS (elt
)->cdr
;
2492 thischange
= XINT (XCONS (elt
)->car
);
2494 /* Merge this range into the accumulated range. */
2495 change
+= thischange
;
2502 /* Get the current start and end positions of the range
2503 that was changed. */
2507 /* We are about to handle these, so discard them. */
2508 combine_after_change_list
= Qnil
;
2510 /* Now run the after-change functions for real.
2511 Turn off the flag that defers them. */
2512 record_unwind_protect (Fcombine_after_change_execute_1
,
2513 Vcombine_after_change_calls
);
2514 signal_after_change (begpos
, endpos
- begpos
- change
, endpos
- begpos
);
2516 return unbind_to (count
, val
);
2522 staticpro (&combine_after_change_list
);
2523 combine_after_change_list
= Qnil
;
2525 DEFVAR_BOOL ("check-markers-debug-flag", &check_markers_debug_flag
,
2526 "Non-nil means enable debugging checks for invalid marker positions.");
2527 check_markers_debug_flag
= 0;
2528 DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls
,
2529 "Used internally by the `combine-after-change-calls' macro.");
2530 Vcombine_after_change_calls
= Qnil
;
2532 defsubr (&Scombine_after_change_execute
);