/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985, 86,93,94,95,97,98, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include <config.h>
#define NULL 0
#endif
-#define min(x, y) ((x) < (y) ? (x) : (y))
-#define max(x, y) ((x) > (y) ? (x) : (y))
-
static void insert_from_string_1 P_ ((Lisp_Object, int, int, int, int, int, int));
static void insert_from_buffer_1 ();
static void gap_left P_ ((int, int, int));
/* Buffer which combine_after_change_list is about. */
Lisp_Object combine_after_change_buffer;
+
+Lisp_Object Qinhibit_modification_hooks;
+
\f
/* Check all markers in the current buffer, looking for something invalid. */
void
check_markers ()
{
- register Lisp_Object tail;
+ register struct Lisp_Marker *tail;
int multibyte = ! NILP (current_buffer->enable_multibyte_characters);
- tail = BUF_MARKERS (current_buffer);
-
- while (! NILP (tail))
+ for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next)
{
- if (XMARKER (tail)->buffer->text != current_buffer->text)
+ if (tail->buffer->text != current_buffer->text)
abort ();
- if (XMARKER (tail)->charpos > Z)
+ if (tail->charpos > Z)
abort ();
- if (XMARKER (tail)->bytepos > Z_BYTE)
+ if (tail->bytepos > Z_BYTE)
abort ();
- if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (XMARKER (tail)->bytepos)))
+ if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos)))
abort ();
-
- tail = XMARKER (tail)->chain;
}
}
\f
register struct Lisp_Marker *m;
register int charpos;
- marker = BUF_MARKERS (current_buffer);
-
- while (!NILP (marker))
+ for (m = BUF_MARKERS (current_buffer); m; m = m->next)
{
- m = XMARKER (marker);
charpos = m->charpos;
if (charpos > Z)
m->charpos -= to - from;
m->bytepos -= to_byte - from_byte;
}
-
/* Here's the case where a marker is inside text being deleted. */
else if (charpos > from)
{
- record_marker_adjustment (marker, from - charpos);
+ if (! m->insertion_type)
+ { /* Normal markers will end up at the beginning of the
+ re-inserted text after undoing a deletion, and must be
+ adjusted to move them to the correct place. */
+ XSETMISC (marker, m);
+ record_marker_adjustment (marker, from - charpos);
+ }
+ else if (charpos < to)
+ { /* Before-insertion markers will automatically move forward
+ upon re-inserting the deleted text, so we have to arrange
+ for them to move backward to the correct position. */
+ XSETMISC (marker, m);
+ record_marker_adjustment (marker, charpos - to);
+ }
m->charpos = from;
m->bytepos = from_byte;
}
-
- marker = m->chain;
+ /* Here's the case where a before-insertion marker is immediately
+ before the deleted region. */
+ else if (charpos == from && m->insertion_type)
+ {
+ /* Undoing the change uses normal insertion, which will
+ incorrectly make MARKER move forward, so we arrange for it
+ to then move backward to the correct place at the beginning
+ of the deleted region. */
+ XSETMISC (marker, m);
+ record_marker_adjustment (marker, to - from);
+ }
}
}
register int from, from_byte, to, to_byte;
int before_markers;
{
- Lisp_Object marker;
+ struct Lisp_Marker *m;
int adjusted = 0;
int nchars = to - from;
int nbytes = to_byte - from_byte;
- marker = BUF_MARKERS (current_buffer);
-
- while (!NILP (marker))
+ for (m = BUF_MARKERS (current_buffer); m; m = m->next)
{
- register struct Lisp_Marker *m = XMARKER (marker);
-
/* In a single-byte buffer, a marker's two positions must be
equal. */
if (Z == Z_BYTE)
m->bytepos += nbytes;
m->charpos += nchars;
}
-
- marker = m->chain;
}
/* Adjusting only markers whose insertion-type is t may result in
- disordered overlays in the slot `overlays_before'. */
+ - disordered start and end in overlays, and
+ - disordered overlays in the slot `overlays_before' of current_buffer. */
if (adjusted)
- fix_overlays_before (current_buffer, from, to);
+ {
+ fix_start_end_in_overlays(from, to);
+ fix_overlays_before (current_buffer, from, to);
+ }
}
/* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters.
new_chars, new_bytes)
int from, from_byte, old_chars, old_bytes, new_chars, new_bytes;
{
- Lisp_Object marker = BUF_MARKERS (current_buffer);
+ register struct Lisp_Marker *m;
int prev_to_byte = from_byte + old_bytes;
int diff_chars = new_chars - old_chars;
int diff_bytes = new_bytes - old_bytes;
- while (!NILP (marker))
+ for (m = BUF_MARKERS (current_buffer); m; m = m->next)
{
- register struct Lisp_Marker *m = XMARKER (marker);
-
if (m->bytepos >= prev_to_byte)
{
m->charpos += diff_chars;
m->charpos = from;
m->bytepos = from_byte;
}
-
- marker = m->chain;
}
CHECK_MARKERS ();
/* Make the gap NBYTES_ADDED bytes longer. */
void
-make_gap (nbytes_added)
+make_gap_larger (nbytes_added)
int nbytes_added;
{
- unsigned char *result;
Lisp_Object tem;
int real_gap_loc;
int real_gap_loc_byte;
/* Don't allow a buffer size that won't fit in an int
even if it will fit in a Lisp integer.
- That won't work because so many places use `int'. */
-
- if (Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added
- >= ((unsigned) 1 << (min (BITS_PER_INT, VALBITS) - 1)))
- error ("Buffer exceeds maximum size");
+ That won't work because so many places use `int'.
- BLOCK_INPUT;
- /* We allocate extra 1-byte `\0' at the tail for anchoring a search. */
- result = BUFFER_REALLOC (BEG_ADDR, (Z_BYTE - BEG_BYTE
- + GAP_SIZE + nbytes_added + 1));
+ Make sure we don't introduce overflows in the calculation. */
- if (result == 0)
- {
- UNBLOCK_INPUT;
- memory_full ();
- }
+ if (Z_BYTE - BEG_BYTE + GAP_SIZE
+ >= (((EMACS_INT) 1 << (min (VALBITS, BITS_PER_INT) - 1)) - 1
+ - nbytes_added))
+ error ("Buffer exceeds maximum size");
- /* We can't unblock until the new address is properly stored. */
- BEG_ADDR = result;
- UNBLOCK_INPUT;
+ enlarge_buffer_text (current_buffer, nbytes_added);
/* Prevent quitting in move_gap. */
tem = Vinhibit_quit;
Vinhibit_quit = tem;
}
+
+
+/* Make the gap NBYTES_REMOVED bytes shorter. */
+
+void
+make_gap_smaller (nbytes_removed)
+ int nbytes_removed;
+{
+ Lisp_Object tem;
+ int real_gap_loc;
+ int real_gap_loc_byte;
+ int real_Z;
+ int real_Z_byte;
+ int real_beg_unchanged;
+ int new_gap_size;
+
+ /* Make sure the gap is at least 20 bytes. */
+ if (GAP_SIZE - nbytes_removed < 20)
+ nbytes_removed = GAP_SIZE - 20;
+
+ /* Prevent quitting in move_gap. */
+ tem = Vinhibit_quit;
+ Vinhibit_quit = Qt;
+
+ real_gap_loc = GPT;
+ real_gap_loc_byte = GPT_BYTE;
+ new_gap_size = GAP_SIZE - nbytes_removed;
+ real_Z = Z;
+ real_Z_byte = Z_BYTE;
+ real_beg_unchanged = BEG_UNCHANGED;
+
+ /* Pretend that the last unwanted part of the gap is the entire gap,
+ and that the first desired part of the gap is part of the buffer
+ text. */
+ bzero (GPT_ADDR, new_gap_size);
+ GPT += new_gap_size;
+ GPT_BYTE += new_gap_size;
+ Z += new_gap_size;
+ Z_BYTE += new_gap_size;
+ GAP_SIZE = nbytes_removed;
+
+ /* Move the unwanted pretend gap to the end of the buffer. This
+ adjusts the markers properly too. */
+ gap_right (Z, Z_BYTE);
+
+ enlarge_buffer_text (current_buffer, -nbytes_removed);
+
+ /* Now restore the desired gap. */
+ GAP_SIZE = new_gap_size;
+ GPT = real_gap_loc;
+ GPT_BYTE = real_gap_loc_byte;
+ Z = real_Z;
+ Z_BYTE = real_Z_byte;
+ BEG_UNCHANGED = real_beg_unchanged;
+
+ /* Put an anchor. */
+ *(Z_ADDR) = 0;
+
+ Vinhibit_quit = tem;
+}
+
+void
+make_gap (nbytes_added)
+ int nbytes_added;
+{
+ if (nbytes_added >= 0)
+ make_gap_larger (nbytes_added);
+#if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC
+ else
+ make_gap_smaller (-nbytes_added);
+#endif
+}
\f
/* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR.
FROM_MULTIBYTE says whether the incoming text is multibyte.
int
copy_text (from_addr, to_addr, nbytes,
from_multibyte, to_multibyte)
- unsigned char *from_addr;
+ const unsigned char *from_addr;
unsigned char *to_addr;
int nbytes;
int from_multibyte, to_multibyte;
int
count_size_as_multibyte (ptr, nbytes)
- unsigned char *ptr;
+ const unsigned char *ptr;
int nbytes;
{
int i;
void
insert (string, nbytes)
- register unsigned char *string;
+ register const unsigned char *string;
register int nbytes;
{
if (nbytes > 0)
{
- int opoint = PT;
- insert_1 (string, nbytes, 0, 1, 0);
- signal_after_change (opoint, 0, PT - opoint);
+ int len = chars_in_text (string, nbytes), opoint;
+ insert_1_both (string, len, nbytes, 0, 1, 0);
+ opoint = PT - len;
+ signal_after_change (opoint, 0, len);
update_compositions (opoint, PT, CHECK_BORDER);
}
}
void
insert_and_inherit (string, nbytes)
- register unsigned char *string;
+ register const unsigned char *string;
register int nbytes;
{
if (nbytes > 0)
{
- int opoint = PT;
- insert_1 (string, nbytes, 1, 1, 0);
- signal_after_change (opoint, 0, PT - opoint);
+ int len = chars_in_text (string, nbytes), opoint;
+ insert_1_both (string, len, nbytes, 1, 1, 0);
+ opoint = PT - len;
+ signal_after_change (opoint, 0, len);
update_compositions (opoint, PT, CHECK_BORDER);
}
}
void
insert_string (s)
- char *s;
+ const char *s;
{
insert (s, strlen (s));
}
void
insert_before_markers (string, nbytes)
- unsigned char *string;
+ const unsigned char *string;
register int nbytes;
{
if (nbytes > 0)
{
- int opoint = PT;
-
- insert_1 (string, nbytes, 0, 1, 1);
- signal_after_change (opoint, 0, PT - opoint);
+ int len = chars_in_text (string, nbytes), opoint;
+ insert_1_both (string, len, nbytes, 0, 1, 1);
+ opoint = PT - len;
+ signal_after_change (opoint, 0, len);
update_compositions (opoint, PT, CHECK_BORDER);
}
}
void
insert_before_markers_and_inherit (string, nbytes)
- unsigned char *string;
+ const unsigned char *string;
register int nbytes;
{
if (nbytes > 0)
{
- int opoint = PT;
-
- insert_1 (string, nbytes, 1, 1, 1);
- signal_after_change (opoint, 0, PT - opoint);
+ int len = chars_in_text (string, nbytes), opoint;
+ insert_1_both (string, len, nbytes, 1, 1, 1);
+ opoint = PT - len;
+ signal_after_change (opoint, 0, len);
update_compositions (opoint, PT, CHECK_BORDER);
}
}
void
insert_1 (string, nbytes, inherit, prepare, before_markers)
- register unsigned char *string;
+ register const unsigned char *string;
register int nbytes;
int inherit, prepare, before_markers;
{
int
count_combining_before (string, length, pos, pos_byte)
- unsigned char *string;
+ const unsigned char *string;
int length;
int pos, pos_byte;
{
int len, combining_bytes;
- unsigned char *p;
+ const unsigned char *p;
if (NILP (current_buffer->enable_multibyte_characters))
return 0;
int
count_combining_after (string, length, pos, pos_byte)
- unsigned char *string;
+ const unsigned char *string;
int length;
int pos, pos_byte;
{
void
insert_1_both (string, nchars, nbytes, inherit, prepare, before_markers)
- register unsigned char *string;
+ register const unsigned char *string;
register int nchars, nbytes;
int inherit, prepare, before_markers;
{
+ if (nchars == 0)
+ return;
+
if (NILP (current_buffer->enable_multibyte_characters))
nchars = nbytes;
will add up to the right stuff in the undo list. */
record_insert (PT, nchars);
MODIFF++;
+ CHARS_MODIFF = MODIFF;
bcopy (string, GPT_ADDR, nbytes);
if (GPT_BYTE < GPT)
abort ();
+ /* The insert may have been in the unchanged region, so check again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
adjust_overlays_for_insert (PT, nchars);
adjust_markers_for_insert (PT, PT_BYTE,
PT + nchars, PT_BYTE + nbytes,
int inherit;
{
int opoint = PT;
+
+ if (SCHARS (string) == 0)
+ return;
+
insert_from_string_1 (string, pos, pos_byte, length, length_byte,
inherit, 0);
signal_after_change (opoint, 0, PT - opoint);
int inherit;
{
int opoint = PT;
+
+ if (SCHARS (string) == 0)
+ return;
+
insert_from_string_1 (string, pos, pos_byte, length, length_byte,
inherit, 1);
signal_after_change (opoint, 0, PT - opoint);
outgoing_nbytes = nchars;
else if (! STRING_MULTIBYTE (string))
outgoing_nbytes
- = count_size_as_multibyte (&XSTRING (string)->data[pos_byte],
+ = count_size_as_multibyte (SDATA (string) + pos_byte,
nbytes);
GCPRO1 (string);
/* Copy the string text into the buffer, perhaps converting
between single-byte and multibyte. */
- copy_text (XSTRING (string)->data + pos_byte, GPT_ADDR, nbytes,
+ copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes,
STRING_MULTIBYTE (string),
! NILP (current_buffer->enable_multibyte_characters));
record_insert (PT, nchars);
MODIFF++;
+ CHARS_MODIFF = MODIFF;
GAP_SIZE -= outgoing_nbytes;
GPT += nchars;
if (GPT_BYTE < GPT)
abort ();
+ /* The insert may have been in the unchanged region, so check again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
adjust_overlays_for_insert (PT, nchars);
adjust_markers_for_insert (PT, PT_BYTE, PT + nchars,
PT_BYTE + outgoing_nbytes,
offset_intervals (current_buffer, PT, nchars);
- intervals = XSTRING (string)->intervals;
+ intervals = STRING_INTERVALS (string);
/* Get the intervals for the part of the string we are inserting. */
- if (nbytes < STRING_BYTES (XSTRING (string)))
+ if (nbytes < SBYTES (string))
intervals = copy_intervals (intervals, pos, nchars);
-
+
/* Insert those intervals. */
graft_intervals_into_buffer (intervals, PT, nchars,
current_buffer, inherit);
if (chunk < incoming_nbytes)
outgoing_after_gap
- = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf,
+ = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf,
from_byte + chunk),
incoming_nbytes - chunk);
outgoing_nbytes = outgoing_before_gap + outgoing_after_gap;
}
-
+
/* Make sure point-max won't overflow after this insertion. */
XSETINT (temp, outgoing_nbytes + Z);
if (outgoing_nbytes + Z != XINT (temp))
record_insert (PT, nchars);
MODIFF++;
+ CHARS_MODIFF = MODIFF;
GAP_SIZE -= outgoing_nbytes;
GPT += nchars;
if (GPT_BYTE < GPT)
abort ();
+ /* The insert may have been in the unchanged region, so check again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
adjust_overlays_for_insert (PT, nchars);
adjust_markers_for_insert (PT, PT_BYTE, PT + nchars,
PT_BYTE + outgoing_nbytes,
from += nchars;
intervals = copy_intervals (intervals, from, nchars);
}
-
+
/* Insert those intervals. */
graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit);
if (STRINGP (prev_text))
{
- nchars_del = XSTRING (prev_text)->size;
- nbytes_del = STRING_BYTES (XSTRING (prev_text));
+ nchars_del = SCHARS (prev_text);
+ nbytes_del = SBYTES (prev_text);
}
/* Update various buffer positions for the new text. */
if (len == 0)
evaporate_overlays (from);
MODIFF++;
+ CHARS_MODIFF = MODIFF;
+}
+
+/* Like adjust_after_replace, but doesn't require PREV_TEXT.
+ This is for use when undo is not enabled in the current buffer. */
+
+void
+adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, len, len_byte)
+ int from, from_byte, nchars_del, nbytes_del, len, len_byte;
+{
+#ifdef BYTE_COMBINING_DEBUG
+ if (count_combining_before (GPT_ADDR, len_byte, from, from_byte)
+ || count_combining_after (GPT_ADDR, len_byte, from, from_byte))
+ abort ();
+#endif
+
+ /* Update various buffer positions for the new text. */
+ GAP_SIZE -= len_byte;
+ ZV += len; Z+= len;
+ ZV_BYTE += len_byte; Z_BYTE += len_byte;
+ GPT += len; GPT_BYTE += len_byte;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+
+ if (nchars_del > 0)
+ adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del,
+ len, len_byte);
+ else
+ adjust_markers_for_insert (from, from_byte,
+ from + len, from_byte + len_byte, 0);
+
+ if (len > nchars_del)
+ adjust_overlays_for_insert (from, len - nchars_del);
+ else if (len < nchars_del)
+ adjust_overlays_for_delete (from, nchars_del - len);
+ if (BUF_INTERVALS (current_buffer) != 0)
+ {
+ offset_intervals (current_buffer, from, len - nchars_del);
+ }
+
+ if (from < PT)
+ adjust_point (len - nchars_del, len_byte - nbytes_del);
+
+ /* As byte combining will decrease Z, we must check this again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
+ CHECK_MARKERS ();
+
+ if (len == 0)
+ evaporate_overlays (from);
+ MODIFF++;
+ CHARS_MODIFF = MODIFF;
}
/* Record undo information, adjust markers and position keepers for an
Z -= len; Z_BYTE -= len_byte;
adjust_after_replace (from, from_byte, Qnil, newlen, len_byte);
}
-
+\f
/* Replace the text from character positions FROM to TO with NEW,
If PREPARE is nonzero, call prepare_to_modify_buffer.
If INHERIT, the newly inserted text should inherit text properties
Lisp_Object new;
int from, to, prepare, inherit, markers;
{
- int inschars = XSTRING (new)->size;
- int insbytes = STRING_BYTES (XSTRING (new));
+ int inschars = SCHARS (new);
+ int insbytes = SBYTES (new);
int from_byte, to_byte;
int nbytes_del, nchars_del;
register Lisp_Object temp;
CHECK_MARKERS ();
GCPRO1 (new);
+ deletion = Qnil;
if (prepare)
{
outgoing_insbytes = inschars;
else if (! STRING_MULTIBYTE (new))
outgoing_insbytes
- = count_size_as_multibyte (XSTRING (new)->data, insbytes);
+ = count_size_as_multibyte (SDATA (new), insbytes);
/* Make sure point-max won't overflow after this insertion. */
XSETINT (temp, Z_BYTE - nbytes_del + insbytes);
if (! EQ (current_buffer->undo_list, Qt))
deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
- if (markers)
- /* Relocate all markers pointing into the new, larger gap
- to point at the end of the text before the gap.
- Do this before recording the deletion,
- so that undo handles this after reinserting the text. */
- adjust_markers_for_delete (from, from_byte, to, to_byte);
-
GAP_SIZE += nbytes_del;
ZV -= nchars_del;
Z -= nchars_del;
Z_BYTE -= nbytes_del;
GPT = from;
GPT_BYTE = from_byte;
- *(GPT_ADDR) = 0; /* Put an anchor. */
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
if (GPT_BYTE < GPT)
abort ();
/* Copy the string text into the buffer, perhaps converting
between single-byte and multibyte. */
- copy_text (XSTRING (new)->data, GPT_ADDR, insbytes,
+ copy_text (SDATA (new), GPT_ADDR, insbytes,
STRING_MULTIBYTE (new),
! NILP (current_buffer->enable_multibyte_characters));
if (! EQ (current_buffer->undo_list, Qt))
{
+ /* Record the insertion first, so that when we undo,
+ the deletion will be undone first. Thus, undo
+ will insert before deleting, and thus will keep
+ the markers before and after this text separate. */
+ record_insert (from + SCHARS (deletion), inschars);
record_delete (from, deletion);
- record_insert (from, inschars);
}
GAP_SIZE -= outgoing_insbytes;
adjusting the markers that bound the overlays. */
adjust_overlays_for_delete (from, nchars_del);
adjust_overlays_for_insert (from, inschars);
+
+ /* Adjust markers for the deletion and the insertion. */
if (markers)
- adjust_markers_for_insert (from, from_byte,
- from + inschars, from_byte + outgoing_insbytes,
- 0);
+ adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del,
+ inschars, outgoing_insbytes);
offset_intervals (current_buffer, from, inschars - nchars_del);
/* Get the intervals for the part of the string we are inserting--
not including the combined-before bytes. */
- intervals = XSTRING (new)->intervals;
+ intervals = STRING_INTERVALS (new);
/* Insert those intervals. */
graft_intervals_into_buffer (intervals, from, inschars,
current_buffer, inherit);
CHECK_MARKERS ();
MODIFF++;
+ CHARS_MODIFF = MODIFF;
UNGCPRO;
signal_after_change (from, nchars_del, GPT - from);
update_compositions (from, GPT, CHECK_BORDER);
}
\f
+/* Replace the text from character positions FROM to TO with
+ the text in INS of length INSCHARS.
+ Keep the text properties that applied to the old characters
+ (extending them to all the new chars if there are more new chars).
+
+ Note that this does not yet handle markers quite right.
+
+ If MARKERS is nonzero, relocate markers.
+
+ Unlike most functions at this level, never call
+ prepare_to_modify_buffer and never call signal_after_change. */
+
+void
+replace_range_2 (from, from_byte, to, to_byte, ins, inschars, insbytes, markers)
+ int from, from_byte, to, to_byte;
+ char *ins;
+ int inschars, insbytes, markers;
+{
+ int nbytes_del, nchars_del;
+ Lisp_Object temp;
+
+ CHECK_MARKERS ();
+
+ nchars_del = to - from;
+ nbytes_del = to_byte - from_byte;
+
+ if (nbytes_del <= 0 && insbytes == 0)
+ return;
+
+ /* Make sure point-max won't overflow after this insertion. */
+ XSETINT (temp, Z_BYTE - nbytes_del + insbytes);
+ if (Z_BYTE - nbytes_del + insbytes != XINT (temp))
+ error ("Maximum buffer size exceeded");
+
+ /* Make sure the gap is somewhere in or next to what we are deleting. */
+ if (from > GPT)
+ gap_right (from, from_byte);
+ if (to < GPT)
+ gap_left (to, to_byte, 0);
+
+ GAP_SIZE += nbytes_del;
+ ZV -= nchars_del;
+ Z -= nchars_del;
+ ZV_BYTE -= nbytes_del;
+ Z_BYTE -= nbytes_del;
+ GPT = from;
+ GPT_BYTE = from_byte;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+
+ if (GPT_BYTE < GPT)
+ abort ();
+
+ if (GPT - BEG < BEG_UNCHANGED)
+ BEG_UNCHANGED = GPT - BEG;
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
+ if (GAP_SIZE < insbytes)
+ make_gap (insbytes - GAP_SIZE);
+
+ /* Copy the replacement text into the buffer. */
+ bcopy (ins, GPT_ADDR, insbytes);
+
+#ifdef BYTE_COMBINING_DEBUG
+ /* We have copied text into the gap, but we have not marked
+ it as part of the buffer. So we can use the old FROM and FROM_BYTE
+ here, for both the previous text and the following text.
+ Meanwhile, GPT_ADDR does point to
+ the text that has been stored by copy_text. */
+ if (count_combining_before (GPT_ADDR, insbytes, from, from_byte)
+ || count_combining_after (GPT_ADDR, insbytes, from, from_byte))
+ abort ();
+#endif
+
+ GAP_SIZE -= insbytes;
+ GPT += inschars;
+ ZV += inschars;
+ Z += inschars;
+ GPT_BYTE += insbytes;
+ ZV_BYTE += insbytes;
+ Z_BYTE += insbytes;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+
+ if (GPT_BYTE < GPT)
+ abort ();
+
+ /* Adjust the overlay center as needed. This must be done after
+ adjusting the markers that bound the overlays. */
+ if (nchars_del != inschars)
+ {
+ adjust_overlays_for_insert (from, inschars);
+ adjust_overlays_for_delete (from + inschars, nchars_del);
+ }
+
+ /* Adjust markers for the deletion and the insertion. */
+ if (markers
+ && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes))
+ adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del,
+ inschars, insbytes);
+
+ offset_intervals (current_buffer, from, inschars - nchars_del);
+
+ /* Relocate point as if it were a marker. */
+ if (from < PT && (nchars_del != inschars || nbytes_del != insbytes))
+ {
+ if (PT < to)
+ /* PT was within the deleted text. Move it to FROM. */
+ adjust_point (from - PT, from_byte - PT_BYTE);
+ else
+ adjust_point (inschars - nchars_del, insbytes - nbytes_del);
+ }
+
+ if (insbytes == 0)
+ evaporate_overlays (from);
+
+ CHECK_MARKERS ();
+
+ MODIFF++;
+ CHARS_MODIFF = MODIFF;
+}
+\f
/* Delete characters in current buffer
from FROM up to (but not including) TO.
If TO comes before FROM, we delete nothing. */
{
int range_length = to - from;
prepare_to_modify_buffer (from, to, &from);
- to = from + range_length;
+ to = min (ZV, from + range_length);
}
from_byte = CHAR_TO_BYTE (from);
if (old_from != from)
from_byte = CHAR_TO_BYTE (from);
- if (old_to == Z - to)
+ if (to > ZV)
+ {
+ to = ZV;
+ to_byte = ZV_BYTE;
+ }
+ else if (old_to == Z - to)
to_byte = CHAR_TO_BYTE (to);
}
if (old_from != from)
from_byte = CHAR_TO_BYTE (from);
- if (old_to == Z - to)
+ if (to > ZV)
+ {
+ to = ZV;
+ to_byte = ZV_BYTE;
+ }
+ else if (old_to == Z - to)
to_byte = CHAR_TO_BYTE (to);
}
if (! EQ (current_buffer->undo_list, Qt))
record_delete (from, deletion);
MODIFF++;
+ CHARS_MODIFF = MODIFF;
/* Relocate point as if it were a marker. */
if (from < PT)
Z -= nchars_del;
GPT = from;
GPT_BYTE = from_byte;
- *(GPT_ADDR) = 0; /* Put an anchor. */
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
if (GPT_BYTE < GPT)
abort ();
character positions START to END. This checks the read-only
properties of the region, calls the necessary modification hooks,
and warns the next redisplay that it should pay attention to that
- area. */
+ area.
+
+ If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF.
+ Otherwise set CHARS_MODIFF to the new value of MODIFF. */
void
-modify_region (buffer, start, end)
+modify_region (buffer, start, end, preserve_chars_modiff)
struct buffer *buffer;
- int start, end;
+ int start, end, preserve_chars_modiff;
{
struct buffer *old_buffer = current_buffer;
if (MODIFF <= SAVE_MODIFF)
record_first_change ();
MODIFF++;
+ if (! preserve_chars_modiff)
+ CHARS_MODIFF = MODIFF;
buffer->point_before_scroll = Qnil;
int start, end;
int *preserve_ptr;
{
+ struct buffer *base_buffer;
+
if (!NILP (current_buffer->read_only))
Fbarf_if_buffer_read_only ();
GCPRO1 (preserve_marker);
verify_interval_modification (current_buffer, start, end);
*preserve_ptr = marker_position (preserve_marker);
- unchain_marker (preserve_marker);
+ unchain_marker (XMARKER (preserve_marker));
UNGCPRO;
}
else
verify_interval_modification (current_buffer, start, end);
}
+ /* For indirect buffers, use the base buffer to check clashes. */
+ if (current_buffer->base_buffer != 0)
+ base_buffer = current_buffer->base_buffer;
+ else
+ base_buffer = current_buffer;
+
#ifdef CLASH_DETECTION
- if (!NILP (current_buffer->file_truename)
+ if (!NILP (base_buffer->file_truename)
/* Make binding buffer-file-name to nil effective. */
- && !NILP (current_buffer->filename)
+ && !NILP (base_buffer->filename)
&& SAVE_MODIFF >= MODIFF)
- lock_file (current_buffer->file_truename);
+ lock_file (base_buffer->file_truename);
#else
/* At least warn if this file has changed on disk since it was visited. */
- if (!NILP (current_buffer->filename)
+ if (!NILP (base_buffer->filename)
&& SAVE_MODIFF >= MODIFF
&& NILP (Fverify_visited_file_modtime (Fcurrent_buffer ()))
- && !NILP (Ffile_exists_p (current_buffer->filename)))
+ && !NILP (Ffile_exists_p (base_buffer->filename)))
call1 (intern ("ask-user-about-supersession-threat"),
- current_buffer->filename);
+ base_buffer->filename);
#endif /* not CLASH_DETECTION */
signal_before_change (start, end, preserve_ptr);
if (! NILP (preserve_marker)) \
{ \
*preserve_ptr = marker_position (preserve_marker); \
- unchain_marker (preserve_marker); \
+ unchain_marker (XMARKER (preserve_marker)); \
}
#define PRESERVE_START_END \
#define FETCH_END \
(! NILP (end_marker) ? Fmarker_position (end_marker) : end)
+/* Set a variable to nil if an error occurred.
+ Don't change the variable if there was no error.
+ VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG).
+ VARIABLE is the variable to maybe set to nil.
+ NO-ERROR-FLAG is nil if there was an error,
+ anything else meaning no error (so this function does nothing). */
+Lisp_Object
+reset_var_on_error (val)
+ Lisp_Object val;
+{
+ if (NILP (XCDR (val)))
+ Fset (XCAR (val), Qnil);
+ return Qnil;
+}
+
/* Signal a change to the buffer immediately before it happens.
START_INT and END_INT are the bounds of the text to be changed.
Lisp_Object start_marker, end_marker;
Lisp_Object preserve_marker;
struct gcpro gcpro1, gcpro2, gcpro3;
+ int count = SPECPDL_INDEX ();
if (inhibit_modification_hooks)
return;
end_marker = Qnil;
GCPRO3 (preserve_marker, start_marker, end_marker);
+ specbind (Qinhibit_modification_hooks, Qt);
+
/* If buffer is unmodified, run a special hook for that case. */
if (SAVE_MODIFF >= MODIFF
&& !NILP (Vfirst_change_hook)
if (!NILP (Vbefore_change_functions))
{
Lisp_Object args[3];
- Lisp_Object before_change_functions;
- Lisp_Object after_change_functions;
- struct gcpro gcpro1, gcpro2;
+ Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil);
PRESERVE_VALUE;
PRESERVE_START_END;
- /* "Bind" before-change-functions and after-change-functions
- to nil--but in a way that errors don't know about.
- That way, if there's an error in them, they will stay nil. */
- before_change_functions = Vbefore_change_functions;
- after_change_functions = Vafter_change_functions;
- Vbefore_change_functions = Qnil;
- Vafter_change_functions = Qnil;
- GCPRO2 (before_change_functions, after_change_functions);
+ /* Mark before-change-functions to be reset to nil in case of error. */
+ record_unwind_protect (reset_var_on_error, rvoe_arg);
/* Actually run the hook functions. */
args[0] = Qbefore_change_functions;
args[1] = FETCH_START;
args[2] = FETCH_END;
- run_hook_list_with_args (before_change_functions, 3, args);
+ Frun_hook_with_args (3, args);
- /* "Unbind" the variables we "bound" to nil. */
- Vbefore_change_functions = before_change_functions;
- Vafter_change_functions = after_change_functions;
- UNGCPRO;
+ /* There was no error: unarm the reset_on_error. */
+ XSETCDR (rvoe_arg, Qt);
}
- if (!NILP (current_buffer->overlays_before)
- || !NILP (current_buffer->overlays_after))
+ if (current_buffer->overlays_before || current_buffer->overlays_after)
{
PRESERVE_VALUE;
report_overlay_modification (FETCH_START, FETCH_END, 0,
free_marker (end_marker);
RESTORE_VALUE;
UNGCPRO;
+
+ unbind_to (count, Qnil);
}
/* Signal a change immediately after it happens.
signal_after_change (charpos, lendel, lenins)
int charpos, lendel, lenins;
{
+ int count = SPECPDL_INDEX ();
if (inhibit_modification_hooks)
return;
just record the args that we were going to use. */
if (! NILP (Vcombine_after_change_calls)
&& NILP (Vbefore_change_functions)
- && NILP (current_buffer->overlays_before)
- && NILP (current_buffer->overlays_after))
+ && !current_buffer->overlays_before
+ && !current_buffer->overlays_after)
{
Lisp_Object elt;
return;
}
- if (!NILP (combine_after_change_list))
+ if (!NILP (combine_after_change_list))
Fcombine_after_change_execute ();
+ specbind (Qinhibit_modification_hooks, Qt);
+
if (!NILP (Vafter_change_functions))
{
Lisp_Object args[4];
- Lisp_Object before_change_functions;
- Lisp_Object after_change_functions;
- struct gcpro gcpro1, gcpro2;
-
- /* "Bind" before-change-functions and after-change-functions
- to nil--but in a way that errors don't know about.
- That way, if there's an error in them, they will stay nil. */
- before_change_functions = Vbefore_change_functions;
- after_change_functions = Vafter_change_functions;
- Vbefore_change_functions = Qnil;
- Vafter_change_functions = Qnil;
- GCPRO2 (before_change_functions, after_change_functions);
+ Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil);
+
+ /* Mark after-change-functions to be reset to nil in case of error. */
+ record_unwind_protect (reset_var_on_error, rvoe_arg);
/* Actually run the hook functions. */
args[0] = Qafter_change_functions;
XSETFASTINT (args[1], charpos);
XSETFASTINT (args[2], charpos + lenins);
XSETFASTINT (args[3], lendel);
- run_hook_list_with_args (after_change_functions,
- 4, args);
+ Frun_hook_with_args (4, args);
- /* "Unbind" the variables we "bound" to nil. */
- Vbefore_change_functions = before_change_functions;
- Vafter_change_functions = after_change_functions;
- UNGCPRO;
+ /* There was no error: unarm the reset_on_error. */
+ XSETCDR (rvoe_arg, Qt);
}
- if (!NILP (current_buffer->overlays_before)
- || !NILP (current_buffer->overlays_after))
+ if (current_buffer->overlays_before || current_buffer->overlays_after)
report_overlay_modification (make_number (charpos),
make_number (charpos + lenins),
1,
if (lendel == 0)
report_interval_modification (make_number (charpos),
make_number (charpos + lenins));
+
+ unbind_to (count, Qnil);
}
Lisp_Object
}
DEFUN ("combine-after-change-execute", Fcombine_after_change_execute,
- Scombine_after_change_execute, 0, 0, 0,
- "This function is for use internally in `combine-after-change-calls'.")
- ()
+ Scombine_after_change_execute, 0, 0, 0,
+ doc: /* This function is for use internally in `combine-after-change-calls'. */)
+ ()
{
- int count = specpdl_ptr - specpdl;
+ int count = SPECPDL_INDEX ();
int beg, end, change;
int begpos, endpos;
Lisp_Object tail;
if (NILP (combine_after_change_list))
return Qnil;
+ /* It is rare for combine_after_change_buffer to be invalid, but
+ possible. It can happen when combine-after-change-calls is
+ non-nil, and insertion calls a file handler (e.g. through
+ lock_file) which scribbles into a temp file -- cyd */
+ if (!BUFFERP (combine_after_change_buffer)
+ || NILP (XBUFFER (combine_after_change_buffer)->name))
+ {
+ combine_after_change_list = Qnil;
+ return Qnil;
+ }
+
record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
Fset_buffer (combine_after_change_buffer);
that was changed. */
begpos = BEG + beg;
endpos = Z - end;
-
+
/* We are about to handle these, so discard them. */
combine_after_change_list = Qnil;
syms_of_insdel ()
{
staticpro (&combine_after_change_list);
+ staticpro (&combine_after_change_buffer);
combine_after_change_list = Qnil;
combine_after_change_buffer = Qnil;
DEFVAR_BOOL ("check-markers-debug-flag", &check_markers_debug_flag,
- "Non-nil means enable debugging checks for invalid marker positions.");
+ doc: /* Non-nil means enable debugging checks for invalid marker positions. */);
check_markers_debug_flag = 0;
DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls,
- "Used internally by the `combine-after-change-calls' macro.");
+ doc: /* Used internally by the `combine-after-change-calls' macro. */);
Vcombine_after_change_calls = Qnil;
DEFVAR_BOOL ("inhibit-modification-hooks", &inhibit_modification_hooks,
- "Non-nil means don't run any of the hooks that respond to buffer changes.\n\
-This affects `before-change-functions' and `after-change-functions',\n\
-as well as hooks attached to text properties and overlays.");
+ doc: /* Non-nil means don't run any of the hooks that respond to buffer changes.
+This affects `before-change-functions' and `after-change-functions',
+as well as hooks attached to text properties and overlays. */);
inhibit_modification_hooks = 0;
+ Qinhibit_modification_hooks = intern ("inhibit-modification-hooks");
+ staticpro (&Qinhibit_modification_hooks);
defsubr (&Scombine_after_change_execute);
}
+
+/* arch-tag: 9b34b886-47d7-465e-a234-299af411b23d
+ (do not change this comment) */
HCoop / bpt / emacs.git / blobdiff