/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985, 86, 93, 94, 95, 97, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
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>
#include "charset.h"
#include "window.h"
#include "blockinput.h"
+#include "region-cache.h"
#ifndef NULL
#define NULL 0
#endif
-#define min(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));
static void gap_right P_ ((int, int));
static void adjust_markers_gap_motion P_ ((int, int, int));
-static void adjust_markers_for_insert P_ ((int, int, int, int, int, int, int));
-static void adjust_markers_for_delete P_ ((int, int, int, int));
-static void adjust_markers_for_record_delete P_ ((int, int, int, int));
+static void adjust_markers_for_insert P_ ((int, int, int, int, int));
+void adjust_markers_for_delete P_ ((int, int, int, int));
+static void adjust_markers_for_replace P_ ((int, int, int, int, int, int));
static void adjust_point P_ ((int, int));
Lisp_Object Fcombine_after_change_execute ();
/* 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. */
+
+static int check_markers_debug_flag;
+
+#define CHECK_MARKERS() \
+ if (check_markers_debug_flag) \
+ check_markers (); \
+ else
+
+void
+check_markers ()
+{
+ register struct Lisp_Marker *tail;
+ int multibyte = ! NILP (current_buffer->enable_multibyte_characters);
+
+ for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next)
+ {
+ if (tail->buffer->text != current_buffer->text)
+ abort ();
+ if (tail->charpos > Z)
+ abort ();
+ if (tail->bytepos > Z_BYTE)
+ abort ();
+ if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos)))
+ abort ();
+ }
+}
\f
/* Move gap to position CHARPOS.
Note that this can quit! */
int new_s1;
if (!newgap)
- {
- if (unchanged_modified == MODIFF
- && overlay_unchanged_modified == OVERLAY_MODIFF)
- {
- beg_unchanged = charpos - BEG;
- end_unchanged = Z - charpos;
- }
- else
- {
- if (Z - GPT < end_unchanged)
- end_unchanged = Z - GPT;
- if (charpos < beg_unchanged)
- beg_unchanged = charpos - BEG;
- }
- }
+ BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT);
i = GPT_BYTE;
to = GAP_END_ADDR;
register int i;
int new_s1;
- if (unchanged_modified == MODIFF
- && overlay_unchanged_modified == OVERLAY_MODIFF)
- {
- beg_unchanged = charpos - BEG;
- end_unchanged = Z - charpos;
- }
- else
- {
- if (Z - charpos - 1 < end_unchanged)
- end_unchanged = Z - charpos;
- if (GPT - BEG < beg_unchanged)
- beg_unchanged = GPT - BEG;
- }
+ BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT);
i = GPT_BYTE;
from = GAP_END_ADDR;
This function assumes that the gap is adjacent to
or inside of the range being deleted. */
-static void
+void
adjust_markers_for_delete (from, from_byte, to, to_byte)
register int from, from_byte, to, to_byte;
{
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);
+ }
}
}
-\f
-/* Adjust all markers for calling record_delete for combining bytes.
- whose range in bytes is FROM_BYTE to TO_BYTE.
- The range in charpos is FROM to TO. */
-static void
-adjust_markers_for_record_delete (from, from_byte, to, to_byte)
- register int from, from_byte, to, to_byte;
-{
- Lisp_Object marker;
- register struct Lisp_Marker *m;
- register int charpos;
-
- marker = BUF_MARKERS (current_buffer);
-
- while (!NILP (marker))
- {
- m = XMARKER (marker);
- charpos = m->charpos;
-
- /* If the marker is after the deletion,
- relocate by number of chars / bytes deleted. */
- if (charpos > to)
- ;
- /* Here's the case where a marker is inside text being deleted. */
- else if (charpos > from)
- record_marker_adjustment (marker, from - charpos);
-
- marker = m->chain;
- }
-}
\f
/* Adjust markers for an insertion that stretches from FROM / FROM_BYTE
to TO / TO_BYTE. We have to relocate the charpos of every marker
that points after the insertion (but not their bytepos).
- COMBINED_BEFORE_BYTES is the number of bytes at the start of the insertion
- that combine into one character with the text before the insertion.
- COMBINED_AFTER_BYTES is the number of bytes after the insertion
- that combine into one character with the last inserted bytes.
-
When a marker points at the insertion point,
we advance it if either its insertion-type is t
or BEFORE_MARKERS is true. */
static void
-adjust_markers_for_insert (from, from_byte, to, to_byte,
- combined_before_bytes, combined_after_bytes,
- before_markers)
+adjust_markers_for_insert (from, from_byte, to, to_byte, before_markers)
register int from, from_byte, to, to_byte;
- int combined_before_bytes, combined_after_bytes, before_markers;
+ 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 this insertion is going to combine characters, Z will
- become different from Z_BYTE, but they might be the same now.
- If so, the two OLD positions of the marker should be equal.) */
+ /* In a single-byte buffer, a marker's two positions must be
+ equal. */
if (Z == Z_BYTE)
{
if (m->charpos != m->bytepos)
{
if (m->insertion_type || before_markers)
{
- m->bytepos += nbytes + combined_after_bytes;
- m->charpos += nchars + !!combined_after_bytes;
- /* Point the marker before the combined character,
- so that undoing the insertion puts it back where it was. */
- if (combined_after_bytes)
- DEC_BOTH (m->charpos, m->bytepos);
+ m->bytepos = to_byte;
+ m->charpos = to;
if (m->insertion_type)
adjusted = 1;
}
- else if (combined_before_bytes)
- {
- /* This marker doesn't "need relocation",
- but don't leave it pointing in the middle of a character.
- Point the marker after the combined character,
- so that undoing the insertion puts it back where it was. */
-
- /* Here we depend on the fact that the gap is after
- all of the combining bytes that we are going to skip over. */
- DEC_BOTH (m->charpos, m->bytepos);
- INC_BOTH (m->charpos, m->bytepos);
- }
- }
- /* If a marker was pointing into the combining bytes
- after the insertion, don't leave it there
- in the middle of a character. */
- else if (combined_after_bytes && m->bytepos >= from_byte
- && m->bytepos < from_byte + combined_after_bytes)
- {
- /* Put it after the combining bytes. */
- m->bytepos = to_byte + combined_after_bytes;
- m->charpos = to + 1;
- /* Now move it back before the combined character,
- so that undoing the insertion will put it where it was. */
- DEC_BOTH (m->charpos, m->bytepos);
}
else if (m->bytepos > from_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.
&& PT != PT_BYTE)
abort ();
}
+\f
+/* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of
+ length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS
+ (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not
+ an insertion. */
+
+static void
+adjust_markers_for_replace (from, from_byte, old_chars, old_bytes,
+ new_chars, new_bytes)
+ int from, from_byte, old_chars, old_bytes, new_chars, new_bytes;
+{
+ 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;
+
+ for (m = BUF_MARKERS (current_buffer); m; m = m->next)
+ {
+ if (m->bytepos >= prev_to_byte)
+ {
+ m->charpos += diff_chars;
+ m->bytepos += diff_bytes;
+ }
+ else if (m->bytepos > from_byte)
+ {
+ m->charpos = from;
+ m->bytepos = from_byte;
+ }
+ }
+
+ CHECK_MARKERS ();
+}
+
\f
/* 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 nchars = 0;
int bytes_left = nbytes;
+ Lisp_Object tbl = Qnil;
+
+ /* We set the variable tbl to the reverse table of
+ Vnonascii_translation_table in advance. */
+ if (CHAR_TABLE_P (Vnonascii_translation_table))
+ {
+ tbl = Fchar_table_extra_slot (Vnonascii_translation_table,
+ make_number (0));
+ if (!CHAR_TABLE_P (tbl))
+ tbl = Qnil;
+ }
/* Convert multibyte to single byte. */
while (bytes_left > 0)
{
int thislen, c;
c = STRING_CHAR_AND_LENGTH (from_addr, bytes_left, thislen);
- *to_addr++ = SINGLE_BYTE_CHAR_P (c) ? c : (c & 0177) + 0200;
+ if (!SINGLE_BYTE_CHAR_P (c))
+ c = multibyte_char_to_unibyte (c, tbl);
+ *to_addr++ = c;
from_addr += thislen;
- bytes_left--;
+ bytes_left -= thislen;
nchars++;
}
return nchars;
while (nbytes > 0)
{
int c = *from_addr++;
- unsigned char workbuf[4], *str;
- int len;
- if (c >= 0240 && c < 0400)
+ if (c >= 0200)
{
c = unibyte_char_to_multibyte (c);
- len = CHAR_STRING (c, workbuf, str);
- bcopy (str, to_addr, len);
- to_addr += len;
+ to_addr += CHAR_STRING (c, to_addr);
nbytes--;
}
else
int
count_size_as_multibyte (ptr, nbytes)
- unsigned char *ptr;
+ const unsigned char *ptr;
int nbytes;
{
int i;
{
unsigned int c = *ptr++;
- if (c < 0240)
+ if (c < 0200)
outgoing_nbytes++;
else
{
c = unibyte_char_to_multibyte (c);
- outgoing_nbytes += XINT (Fchar_bytes (make_number (c)));
+ outgoing_nbytes += CHAR_BYTES (c);
}
}
void
insert (string, nbytes)
- register unsigned char *string;
- register nbytes;
+ 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 nbytes;
+ 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);
}
}
insert_char (c)
int c;
{
- unsigned char workbuf[4], *str;
+ unsigned char str[MAX_MULTIBYTE_LENGTH];
int len;
if (! NILP (current_buffer->enable_multibyte_characters))
- len = CHAR_STRING (c, workbuf, str);
+ len = CHAR_STRING (c, str);
else
{
len = 1;
- workbuf[0] = c;
- str = workbuf;
+ str[0] = c;
}
insert (str, len);
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;
{
insert_1_both (string, chars_in_text (string, nbytes), nbytes,
inherit, prepare, before_markers);
}
+
\f
+#ifdef BYTE_COMBINING_DEBUG
+
/* See if the bytes before POS/POS_BYTE combine with bytes
at the start of STRING to form a single character.
If so, return the number of bytes at the start of STRING
int
count_combining_before (string, length, pos, pos_byte)
- unsigned char *string;
+ const unsigned char *string;
int length;
int pos, pos_byte;
{
- int opos = pos, opos_byte = pos_byte;
- int c;
- unsigned char *p = string;
+ int len, combining_bytes;
+ const unsigned char *p;
if (NILP (current_buffer->enable_multibyte_characters))
return 0;
- if (length == 0 || CHAR_HEAD_P (*string))
+
+ /* At first, we can exclude the following cases:
+ (1) STRING[0] can't be a following byte of multibyte sequence.
+ (2) POS is the start of the current buffer.
+ (3) A character before POS is not a multibyte character. */
+ if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */
return 0;
- if (pos == BEGV)
+ if (pos_byte == BEG_BYTE) /* case (2) */
return 0;
- c = FETCH_BYTE (pos_byte - 1);
- if (ASCII_BYTE_P (c))
+ len = 1;
+ p = BYTE_POS_ADDR (pos_byte - 1);
+ while (! CHAR_HEAD_P (*p)) p--, len++;
+ if (! BASE_LEADING_CODE_P (*p)) /* case (3) */
return 0;
- DEC_BOTH (pos, pos_byte);
- c = FETCH_BYTE (pos_byte);
- if (! BASE_LEADING_CODE_P (c))
+
+ combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len;
+ if (combining_bytes <= 0)
+ /* The character preceding POS is, complete and no room for
+ combining bytes (combining_bytes == 0), or an independent 8-bit
+ character (combining_bytes < 0). */
return 0;
- /* We have a combination situation.
- Count the bytes at STRING that will combine. */
+ /* We have a combination situation. Count the bytes at STRING that
+ may combine. */
+ p = string + 1;
while (!CHAR_HEAD_P (*p) && p < string + length)
p++;
- return p - string;
+ return (combining_bytes < p - string ? combining_bytes : p - string);
}
/* See if the bytes after POS/POS_BYTE combine with bytes
int
count_combining_after (string, length, pos, pos_byte)
- unsigned char *string;
+ const unsigned char *string;
int length;
int pos, pos_byte;
{
- int opos = pos, opos_byte = pos_byte;
+ int opos_byte = pos_byte;
int i;
- int c;
+ int bytes;
+ unsigned char *bufp;
if (NILP (current_buffer->enable_multibyte_characters))
return 0;
- if (length == 0 || ASCII_BYTE_P (string[length - 1]))
+
+ /* At first, we can exclude the following cases:
+ (1) The last byte of STRING is an ASCII.
+ (2) POS is the last of the current buffer.
+ (3) A character at POS can't be a following byte of multibyte
+ character. */
+ if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */
+ return 0;
+ if (pos_byte == Z_BYTE) /* case (2) */
+ return 0;
+ bufp = BYTE_POS_ADDR (pos_byte);
+ if (CHAR_HEAD_P (*bufp)) /* case (3) */
return 0;
+
i = length - 1;
- while (i > 0 && ! CHAR_HEAD_P (string[i]))
+ while (i >= 0 && ! CHAR_HEAD_P (string[i]))
{
i--;
}
- if (! BASE_LEADING_CODE_P (string[i]))
- return 0;
-
- if (pos == ZV)
- return 0;
- c = FETCH_BYTE (pos_byte);
- if (CHAR_HEAD_P (c))
- return 0;
- while (pos_byte < ZV_BYTE)
+ if (i < 0)
{
- c = FETCH_BYTE (pos_byte);
- if (CHAR_HEAD_P (c))
- break;
- pos_byte++;
+ /* All characters in STRING are not character head. We must
+ check also preceding bytes at POS. We are sure that the gap
+ is at POS. */
+ unsigned char *p = BEG_ADDR;
+ i = pos_byte - 2;
+ while (i >= 0 && ! CHAR_HEAD_P (p[i]))
+ i--;
+ if (i < 0 || !BASE_LEADING_CODE_P (p[i]))
+ return 0;
+
+ bytes = BYTES_BY_CHAR_HEAD (p[i]);
+ return (bytes <= pos_byte - 1 - i + length
+ ? 0
+ : bytes - (pos_byte - 1 - i + length));
}
+ if (!BASE_LEADING_CODE_P (string[i]))
+ return 0;
- return pos_byte - opos_byte;
-}
-
-/* Adjust the position TARGET/TARGET_BYTE for the combining of NBYTES
- following the position POS/POS_BYTE to the character preceding POS.
- If TARGET is after POS+NBYTES, we only have to adjust the character
- position TARGET, else, if TARGET is after POS, we have to adjust
- both the character position TARGET and the byte position
- TARGET_BYTE, else we don't have to do any adjustment. */
-
-#define ADJUST_CHAR_POS(target, target_byte) \
- do { \
- if (target > pos + nbytes) \
- target -= nbytes; \
- else if (target >= pos) \
- { \
- target = pos; \
- target_byte = pos_byte + nbytes; \
- } \
- } while (0)
-
-/* Combine NBYTES stray trailing-codes, which were formerly separate
- characters, with the preceding character. These bytes
- are located after position POS / POS_BYTE, and the preceding character
- is located just before that position. */
+ bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i);
+ bufp++, pos_byte++;
+ while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++;
-static void
-combine_bytes (pos, pos_byte, nbytes)
- int pos, pos_byte, nbytes;
-{
- /* Adjust all markers. */
- adjust_markers_for_delete (pos, pos_byte, pos + nbytes, pos_byte);
-
- adjust_overlays_for_delete (pos, nbytes);
+ return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte);
+}
- ADJUST_CHAR_POS (BUF_PT (current_buffer), BUF_PT_BYTE (current_buffer));
- ADJUST_CHAR_POS (GPT, GPT_BYTE);
- ADJUST_CHAR_POS (Z, Z_BYTE);
- ADJUST_CHAR_POS (ZV, ZV_BYTE);
+#endif
- if (BUF_INTERVALS (current_buffer) != 0)
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
- offset_intervals (current_buffer, pos, - nbytes);
-}
\f
/* Insert a sequence of NCHARS chars which occupy NBYTES bytes
starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS
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;
{
- register Lisp_Object temp, deletion;
- int combined_before_bytes, combined_after_bytes;
+ if (nchars == 0)
+ return;
if (NILP (current_buffer->enable_multibyte_characters))
nchars = nbytes;
+ if (prepare)
+ /* Do this before moving and increasing the gap,
+ because the before-change hooks might move the gap
+ or make it smaller. */
+ prepare_to_modify_buffer (PT, PT, NULL);
+
if (PT != GPT)
move_gap_both (PT, PT_BYTE);
if (GAP_SIZE < nbytes)
make_gap (nbytes - GAP_SIZE);
- if (prepare)
- prepare_to_modify_buffer (PT, PT, NULL);
-
- combined_before_bytes
- = count_combining_before (string, nbytes, PT, PT_BYTE);
- combined_after_bytes
- = count_combining_after (string, nbytes, PT, PT_BYTE);
+#ifdef BYTE_COMBINING_DEBUG
+ if (count_combining_before (string, nbytes, PT, PT_BYTE)
+ || count_combining_after (string, nbytes, PT, PT_BYTE))
+ abort ();
+#endif
/* Record deletion of the surrounding text that combines with
the insertion. This, together with recording the insertion,
- will add up to the right stuff in the undo list.
-
- But there is no need to actually delete the combining bytes
- from the buffer and reinsert them. */
-
- if (combined_after_bytes)
- {
- deletion = make_buffer_string_both (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes, 1);
-
- adjust_markers_for_record_delete (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes);
- record_delete (PT, deletion);
- }
-
- if (combined_before_bytes)
- {
- deletion = make_buffer_string_both (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE, 1);
- adjust_markers_for_record_delete (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE);
- record_delete (PT - 1, deletion);
- }
-
- record_insert (PT - !!combined_before_bytes,
- nchars - combined_before_bytes + !!combined_before_bytes);
+ will add up to the right stuff in the undo list. */
+ record_insert (PT, nchars);
MODIFF++;
bcopy (string, GPT_ADDR, nbytes);
GAP_SIZE -= nbytes;
- /* When we have combining at the end of the insertion,
- this is the character position before the combined character. */
GPT += nchars;
ZV += nchars;
Z += nchars;
Z_BYTE += nbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
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,
- combined_before_bytes, combined_after_bytes,
before_markers);
-#ifdef USE_TEXT_PROPERTIES
if (BUF_INTERVALS (current_buffer) != 0)
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
offset_intervals (current_buffer, PT, nchars);
if (!inherit && BUF_INTERVALS (current_buffer) != 0)
- Fset_text_properties (make_number (PT), make_number (PT + nchars),
- Qnil, Qnil);
-#endif
+ set_text_properties (make_number (PT), make_number (PT + nchars),
+ Qnil, Qnil, Qnil);
- {
- int pos = PT, pos_byte = PT_BYTE;
+ adjust_point (nchars, nbytes);
- adjust_point (nchars + combined_after_bytes,
- nbytes + combined_after_bytes);
-
- if (combined_after_bytes)
- combine_bytes (pos + nchars, pos_byte + nbytes, combined_after_bytes);
-
- if (combined_before_bytes)
- combine_bytes (pos, pos_byte, combined_before_bytes);
- }
+ CHECK_MARKERS ();
}
\f
/* Insert the part of the text of STRING, a Lisp object assumed to be
register int pos, pos_byte, length, length_byte;
int inherit;
{
- if (length > 0)
- {
- int opoint = PT;
- insert_from_string_1 (string, pos, pos_byte, length, length_byte,
- inherit, 0);
- signal_after_change (opoint, 0, PT - opoint);
- }
+ 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);
+ update_compositions (opoint, PT, CHECK_BORDER);
}
/* Like `insert_from_string' except that all markers pointing
register int pos, pos_byte, length, length_byte;
int inherit;
{
- if (length > 0)
- {
- int opoint = PT;
- insert_from_string_1 (string, pos, pos_byte, length, length_byte,
- inherit, 1);
- signal_after_change (opoint, 0, PT - opoint);
- }
+ 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);
+ update_compositions (opoint, PT, CHECK_BORDER);
}
/* Subroutine of the insertion functions above. */
register int pos, pos_byte, nchars, nbytes;
int inherit, before_markers;
{
- register Lisp_Object temp;
struct gcpro gcpro1;
int outgoing_nbytes = nbytes;
- int combined_before_bytes, combined_after_bytes;
- int adjusted_nchars;
INTERVAL intervals;
- Lisp_Object deletion;
/* Make OUTGOING_NBYTES describe the text
as it will be inserted in this buffer. */
if (NILP (current_buffer->enable_multibyte_characters))
outgoing_nbytes = nchars;
- else if (nchars == nbytes)
+ 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);
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, outgoing_nbytes + Z);
- if (outgoing_nbytes + Z != XINT (temp))
- error ("Maximum buffer size exceeded");
-
GCPRO1 (string);
+ /* Do this before moving and increasing the gap,
+ because the before-change hooks might move the gap
+ or make it smaller. */
prepare_to_modify_buffer (PT, PT, NULL);
if (PT != GPT)
move_gap_both (PT, PT_BYTE);
- if (GAP_SIZE < nbytes)
+ if (GAP_SIZE < outgoing_nbytes)
make_gap (outgoing_nbytes - GAP_SIZE);
UNGCPRO;
/* Copy the string text into the buffer, perhaps converting
between single-byte and multibyte. */
- copy_text (XSTRING (string)->data + pos_byte, GPT_ADDR, nbytes,
- /* If these are equal, it is a single-byte string.
- Its chars are either ASCII, in which case copy_text
- won't change it, or single-byte non-ASCII chars,
- that need to be changed. */
- nchars != nbytes,
+ copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes,
+ STRING_MULTIBYTE (string),
! NILP (current_buffer->enable_multibyte_characters));
+#ifdef BYTE_COMBINING_DEBUG
/* We have copied text into the gap, but we have not altered
PT or PT_BYTE yet. So we can pass PT and PT_BYTE
to these functions and get the same results as we would
have got earlier on. Meanwhile, PT_ADDR does point to
the text that has been stored by copy_text. */
+ if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)
+ || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE))
+ abort ();
+#endif
- combined_before_bytes
- = count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE);
- combined_after_bytes
- = count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE);
-
- /* Record deletion of the surrounding text that combines with
- the insertion. This, together with recording the insertion,
- will add up to the right stuff in the undo list.
-
- But there is no need to actually delete the combining bytes
- from the buffer and reinsert them. */
-
- if (combined_after_bytes)
- {
- deletion = make_buffer_string_both (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes, 1);
-
- adjust_markers_for_record_delete (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes);
- record_delete (PT, deletion);
- }
-
- if (combined_before_bytes)
- {
- deletion = make_buffer_string_both (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE, 1);
- adjust_markers_for_record_delete (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE);
- record_delete (PT - 1, deletion);
- }
-
- record_insert (PT - !!combined_before_bytes,
- nchars - combined_before_bytes + !!combined_before_bytes);
+ record_insert (PT, nchars);
MODIFF++;
GAP_SIZE -= outgoing_nbytes;
Z_BYTE += outgoing_nbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
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,
- combined_before_bytes, combined_after_bytes,
before_markers);
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
offset_intervals (current_buffer, PT, nchars);
- intervals = XSTRING (string)->intervals;
- /* Get the intervals for the part of the string we are inserting--
- not including the combined-before bytes. */
- if (nbytes < STRING_BYTES (XSTRING (string)))
+ intervals = STRING_INTERVALS (string);
+ /* Get the intervals for the part of the string we are inserting. */
+ if (nbytes < SBYTES (string))
intervals = copy_intervals (intervals, pos, nchars);
-
+
/* Insert those intervals. */
graft_intervals_into_buffer (intervals, PT, nchars,
current_buffer, inherit);
- {
- int pos = PT, pos_byte = PT_BYTE;
-
- adjust_point (nchars + combined_after_bytes,
- outgoing_nbytes + combined_after_bytes);
-
- if (combined_after_bytes)
- combine_bytes (pos + nchars, pos_byte + outgoing_nbytes,
- combined_after_bytes);
-
- if (combined_before_bytes)
- combine_bytes (pos, pos_byte, combined_before_bytes);
- }
+ adjust_point (nchars, outgoing_nbytes);
}
\f
/* Insert text from BUF, NCHARS characters starting at CHARPOS, into the
int charpos, nchars;
int inherit;
{
- if (nchars > 0)
- {
- int opoint = PT;
+ int opoint = PT;
- insert_from_buffer_1 (buf, charpos, nchars, inherit);
- signal_after_change (opoint, 0, PT - opoint);
- }
+ insert_from_buffer_1 (buf, charpos, nchars, inherit);
+ signal_after_change (opoint, 0, PT - opoint);
+ update_compositions (opoint, PT, CHECK_BORDER);
}
static void
int from, nchars;
int inherit;
{
- register Lisp_Object temp, deletion;
- int chunk;
+ register Lisp_Object temp;
+ int chunk, chunk_expanded;
int from_byte = buf_charpos_to_bytepos (buf, from);
int to_byte = buf_charpos_to_bytepos (buf, from + nchars);
int incoming_nbytes = to_byte - from_byte;
int outgoing_nbytes = incoming_nbytes;
- int combined_before_bytes, combined_after_bytes;
- int adjusted_nchars;
INTERVAL intervals;
/* Make OUTGOING_NBYTES describe the text
if (NILP (current_buffer->enable_multibyte_characters))
outgoing_nbytes = nchars;
else if (NILP (buf->enable_multibyte_characters))
- outgoing_nbytes
- = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte),
- incoming_nbytes);
+ {
+ int outgoing_before_gap = 0;
+ int outgoing_after_gap = 0;
+
+ if (from < BUF_GPT (buf))
+ {
+ chunk = BUF_GPT_BYTE (buf) - from_byte;
+ if (chunk > incoming_nbytes)
+ chunk = incoming_nbytes;
+ outgoing_before_gap
+ = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte),
+ chunk);
+ }
+ else
+ chunk = 0;
+
+ if (chunk < incoming_nbytes)
+ outgoing_after_gap
+ = 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))
error ("Maximum buffer size exceeded");
+ /* Do this before moving and increasing the gap,
+ because the before-change hooks might move the gap
+ or make it smaller. */
prepare_to_modify_buffer (PT, PT, NULL);
if (PT != GPT)
chunk = BUF_GPT_BYTE (buf) - from_byte;
if (chunk > incoming_nbytes)
chunk = incoming_nbytes;
- copy_text (BUF_BYTE_ADDRESS (buf, from_byte),
- GPT_ADDR, chunk,
- ! NILP (buf->enable_multibyte_characters),
- ! NILP (current_buffer->enable_multibyte_characters));
+ /* Record number of output bytes, so we know where
+ to put the output from the second copy_text. */
+ chunk_expanded
+ = copy_text (BUF_BYTE_ADDRESS (buf, from_byte),
+ GPT_ADDR, chunk,
+ ! NILP (buf->enable_multibyte_characters),
+ ! NILP (current_buffer->enable_multibyte_characters));
}
else
- chunk = 0;
+ chunk_expanded = chunk = 0;
+
if (chunk < incoming_nbytes)
copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk),
- GPT_ADDR + chunk, incoming_nbytes - chunk,
+ GPT_ADDR + chunk_expanded, incoming_nbytes - chunk,
! NILP (buf->enable_multibyte_characters),
! NILP (current_buffer->enable_multibyte_characters));
+#ifdef BYTE_COMBINING_DEBUG
/* We have copied text into the gap, but we have not altered
PT or PT_BYTE yet. So we can pass PT and PT_BYTE
to these functions and get the same results as we would
have got earlier on. Meanwhile, GPT_ADDR does point to
the text that has been stored by copy_text. */
- combined_before_bytes
- = count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE);
- combined_after_bytes
- = count_combining_after (GPT_ADDR, outgoing_nbytes,
- PT, PT_BYTE);
-
- /* Record deletion of the surrounding text that combines with
- the insertion. This, together with recording the insertion,
- will add up to the right stuff in the undo list.
-
- But there is no need to actually delete the combining bytes
- from the buffer and reinsert them. */
-
- if (combined_after_bytes)
- {
- deletion = make_buffer_string_both (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes, 1);
-
- adjust_markers_for_record_delete (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes);
- record_delete (PT, deletion);
- }
-
- if (combined_before_bytes)
- {
- deletion = make_buffer_string_both (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE, 1);
- adjust_markers_for_record_delete (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE);
- record_delete (PT - 1, deletion);
- }
+ if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)
+ || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE))
+ abort ();
+#endif
- record_insert (PT - !!combined_before_bytes,
- nchars - combined_before_bytes + !!combined_before_bytes);
+ record_insert (PT, nchars);
MODIFF++;
GAP_SIZE -= outgoing_nbytes;
Z_BYTE += outgoing_nbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
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,
- combined_before_bytes, combined_after_bytes, 0);
+ 0);
-#ifdef USE_TEXT_PROPERTIES
if (BUF_INTERVALS (current_buffer) != 0)
offset_intervals (current_buffer, PT, nchars);
-#endif
- /* Get the intervals for the part of the string we are inserting--
- not including the combined-before bytes. */
+ /* Get the intervals for the part of the string we are inserting. */
intervals = BUF_INTERVALS (buf);
if (outgoing_nbytes < BUF_Z_BYTE (buf) - BUF_BEG_BYTE (buf))
- intervals = copy_intervals (intervals, from, nchars);
-
+ {
+ if (buf == current_buffer && PT <= from)
+ from += nchars;
+ intervals = copy_intervals (intervals, from, nchars);
+ }
+
/* Insert those intervals. */
graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit);
- {
- int pos = PT, pos_byte = PT_BYTE;
-
- adjust_point (nchars + combined_after_bytes,
- outgoing_nbytes + combined_after_bytes);
-
- if (combined_after_bytes)
- combine_bytes (pos + nchars, pos_byte + outgoing_nbytes,
- combined_after_bytes);
-
- if (combined_before_bytes)
- combine_bytes (pos, pos_byte, combined_before_bytes);
- }
+ adjust_point (nchars, outgoing_nbytes);
}
\f
-/* This function should be called after moving gap to FROM and before
- altering text between FROM and TO. This adjusts various position
- keepers and markers as if the text is deleted. Don't forget to
- call adjust_after_replace after you actually alter the text. */
+/* Record undo information and adjust markers and position keepers for
+ a replacement of a text PREV_TEXT at FROM to a new text of LEN
+ chars (LEN_BYTE bytes) which resides in the gap just after
+ GPT_ADDR.
+
+ PREV_TEXT nil means the new text was just inserted. */
void
-adjust_before_replace (from, from_byte, to, to_byte)
- int from, from_byte, to, to_byte;
+adjust_after_replace (from, from_byte, prev_text, len, len_byte)
+ int from, from_byte, len, len_byte;
+ Lisp_Object prev_text;
{
- Lisp_Object deletion;
- deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
+ int nchars_del = 0, nbytes_del = 0;
- adjust_markers_for_delete (from, from_byte, to, to_byte);
- record_delete (from, deletion);
- adjust_overlays_for_delete (from, to - from);
-}
+#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
-/* This function should be called after altering the text between FROM
- and TO to a new text of LEN chars (LEN_BYTE bytes), but before
- making the text a buffer contents. It exists just after GPT_ADDR. */
+ if (STRINGP (prev_text))
+ {
+ nchars_del = SCHARS (prev_text);
+ nbytes_del = SBYTES (prev_text);
+ }
-void
-adjust_after_replace (from, from_byte, to, to_byte, len, len_byte, replace)
- int from, from_byte, to, to_byte, len, len_byte, replace;
-{
- int combined_before_bytes
- = count_combining_before (GPT_ADDR, len_byte, from, from_byte);
- int combined_after_bytes
- = count_combining_after (GPT_ADDR, len_byte, from, from_byte);
- Lisp_Object deletion;
+ /* 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 (combined_after_bytes)
- {
- deletion = make_buffer_string_both (from, from_byte,
- from + combined_after_bytes,
- from_byte + combined_after_bytes, 1);
+ 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);
- adjust_markers_for_record_delete (from, from_byte,
- from + combined_after_bytes,
- from_byte + combined_after_bytes);
- record_delete (from, deletion);
+ if (! EQ (current_buffer->undo_list, Qt))
+ {
+ if (nchars_del > 0)
+ record_delete (from, prev_text);
+ record_insert (from, len);
}
- if (combined_before_bytes)
+ 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)
{
- deletion = make_buffer_string_both (from - 1, CHAR_TO_BYTE (from - 1),
- from, from_byte, 1);
- adjust_markers_for_record_delete (from - 1, CHAR_TO_BYTE (from - 1),
- from, from_byte);
- record_delete (from - 1, deletion);
+ 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++;
+}
+
+/* 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;
GPT += len; GPT_BYTE += len_byte;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
- record_insert (from - !!combined_before_bytes,
- len - combined_before_bytes + !!combined_before_bytes);
- adjust_overlays_for_insert (from, len);
- adjust_markers_for_insert (from, from_byte,
- from + len, from_byte + len_byte,
- combined_before_bytes, combined_after_bytes, 0);
-#ifdef USE_TEXT_PROPERTIES
- if (BUF_INTERVALS (current_buffer) != 0)
- /* REPLACE zero means that we have not yet adjusted the interval
- tree for the text between FROM and TO, thus, we must treat the
- new text as a newly inserted text, not as a replacement of
- something. */
- offset_intervals (current_buffer, from, len - (replace ? to - from : 0));
-#endif
+ 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);
- {
- int pos = PT, pos_byte = PT_BYTE;
+ 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 - (to - from) + combined_after_bytes,
- len_byte - (to_byte - from_byte) + combined_after_bytes);
- else if (from == PT && combined_before_bytes)
- adjust_point (0, combined_before_bytes);
+ if (from < PT)
+ adjust_point (len - nchars_del, len_byte - nbytes_del);
- if (combined_after_bytes)
- combine_bytes (from + len, from_byte + len_byte, combined_after_bytes);
+ /* As byte combining will decrease Z, we must check this again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
- if (combined_before_bytes)
- combine_bytes (from, from_byte, combined_before_bytes);
- }
+ CHECK_MARKERS ();
if (len == 0)
evaporate_overlays (from);
MODIFF++;
}
+/* Record undo information, adjust markers and position keepers for an
+ insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The
+ text already exists in the current buffer but character length (TO
+ - FROM) may be incorrect, the correct length is NEWLEN. */
+
+void
+adjust_after_insert (from, from_byte, to, to_byte, newlen)
+ int from, from_byte, to, to_byte, newlen;
+{
+ int len = to - from, len_byte = to_byte - from_byte;
+
+ if (GPT != to)
+ move_gap_both (to, to_byte);
+ GAP_SIZE += len_byte;
+ GPT -= len; GPT_BYTE -= len_byte;
+ ZV -= len; ZV_BYTE -= len_byte;
+ 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
/* Note that this does not yet handle markers quite right.
Also it needs to record a single undo-entry that does a replacement
rather than a separate delete and insert.
- That way, undo will also handle markers properly. */
+ That way, undo will also handle markers properly.
+
+ But if MARKERS is 0, don't relocate markers. */
void
-replace_range (from, to, new, prepare, inherit, nomarkers)
+replace_range (from, to, new, prepare, inherit, markers)
Lisp_Object new;
- int from, to, prepare, inherit, nomarkers;
+ 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;
struct gcpro gcpro1;
- int combined_before_bytes, combined_after_bytes;
- int adjusted_inschars;
INTERVAL intervals;
int outgoing_insbytes = insbytes;
Lisp_Object deletion;
+ CHECK_MARKERS ();
+
GCPRO1 (new);
+ deletion = Qnil;
if (prepare)
{
if (NILP (current_buffer->enable_multibyte_characters))
outgoing_insbytes = inschars;
- else if (inschars == insbytes)
+ 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 (to < GPT)
gap_left (to, to_byte, 0);
- deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
-
- if (nomarkers)
- /* 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);
-
- record_delete (from, deletion);
+ /* Even if we don't record for undo, we must keep the original text
+ because we may have to recover it because of inappropriate byte
+ combining. */
+ if (! EQ (current_buffer->undo_list, Qt))
+ deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
GAP_SIZE += nbytes_del;
ZV -= 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 ();
- if (GPT - BEG < beg_unchanged)
- beg_unchanged = GPT - BEG;
- if (Z - GPT < end_unchanged)
- end_unchanged = Z - GPT;
+ 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 string text into the buffer, perhaps converting
between single-byte and multibyte. */
- copy_text (XSTRING (new)->data, GPT_ADDR, insbytes,
- /* If these are equal, it is a single-byte string.
- Its chars are either ASCII, in which case copy_text
- won't change it, or single-byte non-ASCII chars,
- that need to be changed. */
- inschars != insbytes,
+ copy_text (SDATA (new), GPT_ADDR, insbytes,
+ STRING_MULTIBYTE (new),
! NILP (current_buffer->enable_multibyte_characters));
- /* We have copied text into the gap, but we have not altered
- PT or PT_BYTE yet. So we can pass PT and PT_BYTE
- to these functions and get the same results as we would
- have got earlier on. Meanwhile, GPT_ADDR does point to
+#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, outgoing_insbytes, from, from_byte)
+ || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte))
+ abort ();
+#endif
- combined_before_bytes
- = count_combining_before (GPT_ADDR, outgoing_insbytes, PT, PT_BYTE);
- combined_after_bytes
- = count_combining_after (GPT_ADDR, outgoing_insbytes, PT, PT_BYTE);
-
- /* Record deletion of the surrounding text that combines with
- the insertion. This, together with recording the insertion,
- will add up to the right stuff in the undo list.
-
- But there is no need to actually delete the combining bytes
- from the buffer and reinsert them. */
-
- if (combined_after_bytes)
- {
- deletion = make_buffer_string_both (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes, 1);
-
- adjust_markers_for_record_delete (PT, PT_BYTE,
- PT + combined_after_bytes,
- PT_BYTE + combined_after_bytes);
- record_delete (PT, deletion);
- }
-
- if (combined_before_bytes)
+ if (! EQ (current_buffer->undo_list, Qt))
{
- deletion = make_buffer_string_both (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE, 1);
- adjust_markers_for_record_delete (PT - 1, CHAR_TO_BYTE (PT - 1),
- PT, PT_BYTE);
- record_delete (PT - 1, deletion);
+ record_delete (from, deletion);
+ record_insert (from, inschars);
}
- record_insert (PT - !!combined_before_bytes,
- inschars - combined_before_bytes + !!combined_before_bytes);
-
GAP_SIZE -= outgoing_insbytes;
GPT += inschars;
ZV += inschars;
Z_BYTE += outgoing_insbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
if (GPT_BYTE < GPT)
abort ();
adjusting the markers that bound the overlays. */
adjust_overlays_for_delete (from, nchars_del);
adjust_overlays_for_insert (from, inschars);
- if (nomarkers)
- adjust_markers_for_insert (from, from_byte,
- from + inschars, from_byte + outgoing_insbytes,
- combined_before_bytes, combined_after_bytes, 0);
-#ifdef USE_TEXT_PROPERTIES
- offset_intervals (current_buffer, PT, inschars - nchars_del);
+ /* Adjust markers for the deletion and the insertion. */
+ if (markers)
+ 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);
-#endif
/* Relocate point as if it were a marker. */
if (from < PT)
- adjust_point ((from + inschars - (PT < to ? PT : to)
- + combined_after_bytes),
+ adjust_point ((from + inschars - (PT < to ? PT : to)),
(from_byte + outgoing_insbytes
- - (PT_BYTE < to_byte ? PT_BYTE : to_byte)
- + combined_after_bytes));
-
- if (combined_after_bytes)
- combine_bytes (from + inschars, from_byte + outgoing_insbytes,
- combined_after_bytes);
-
- if (combined_before_bytes)
- combine_bytes (from, from_byte, combined_before_bytes);
+ - (PT_BYTE < to_byte ? PT_BYTE : to_byte)));
if (outgoing_insbytes == 0)
evaporate_overlays (from);
+ CHECK_MARKERS ();
+
MODIFF++;
UNGCPRO;
- signal_after_change (from, nchars_del, PT - from);
+ 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++;
}
\f
/* Delete characters in current buffer
del_range (from, to)
register int from, to;
{
- del_range_1 (from, to, 1);
+ del_range_1 (from, to, 1, 0);
}
-/* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. */
+/* Like del_range; PREPARE says whether to call prepare_to_modify_buffer.
+ RET_STRING says to return the deleted text. */
-void
-del_range_1 (from, to, prepare)
- int from, to, prepare;
+Lisp_Object
+del_range_1 (from, to, prepare, ret_string)
+ int from, to, prepare, ret_string;
{
int from_byte, to_byte;
+ Lisp_Object deletion;
+ struct gcpro gcpro1;
/* Make args be valid */
if (from < BEGV)
to = ZV;
if (to <= from)
- return;
+ return Qnil;
if (prepare)
{
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);
to_byte = CHAR_TO_BYTE (to);
- del_range_2 (from, from_byte, to, to_byte);
+ deletion = del_range_2 (from, from_byte, to, to_byte, ret_string);
+ GCPRO1(deletion);
+ signal_after_change (from, to - from, 0);
+ update_compositions (from, from, CHECK_HEAD);
+ UNGCPRO;
+ return deletion;
}
/* Like del_range_1 but args are byte positions, not char positions. */
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);
}
- del_range_2 (from, from_byte, to, to_byte);
+ del_range_2 (from, from_byte, to, to_byte, 0);
+ signal_after_change (from, to - from, 0);
+ update_compositions (from, from, CHECK_HEAD);
}
/* Like del_range_1, but positions are specified both as charpos
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);
}
- del_range_2 (from, from_byte, to, to_byte);
+ del_range_2 (from, from_byte, to, to_byte, 0);
+ signal_after_change (from, to - from, 0);
+ update_compositions (from, from, CHECK_HEAD);
}
/* Delete a range of text, specified both as character positions
and byte positions. FROM and TO are character positions,
- while FROM_BYTE and TO_BYTE are byte positions. */
+ while FROM_BYTE and TO_BYTE are byte positions.
+ If RET_STRING is true, the deleted area is returned as a string. */
-void
-del_range_2 (from, from_byte, to, to_byte)
- int from, from_byte, to, to_byte;
+Lisp_Object
+del_range_2 (from, from_byte, to, to_byte, ret_string)
+ int from, from_byte, to, to_byte, ret_string;
{
register int nbytes_del, nchars_del;
- int combined_after_bytes;
Lisp_Object deletion;
- int from_byte_1;
+
+ CHECK_MARKERS ();
nchars_del = to - from;
nbytes_del = to_byte - from_byte;
if (to < GPT)
gap_left (to, to_byte, 0);
- combined_after_bytes
- = count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte),
- ZV_BYTE - to_byte, from, from_byte);
- if (combined_after_bytes)
- {
- from_byte_1 = from_byte;
- DEC_POS (from_byte_1);
- }
- else
- from_byte_1 = from_byte;
+#ifdef BYTE_COMBINING_DEBUG
+ if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte),
+ Z_BYTE - to_byte, from, from_byte))
+ abort ();
+#endif
- deletion
- = make_buffer_string_both (from - !!combined_after_bytes,
- from_byte_1,
- to + combined_after_bytes,
- to_byte + combined_after_bytes, 1);
+ if (ret_string || ! EQ (current_buffer->undo_list, Qt))
+ deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
+ else
+ deletion = Qnil;
/* 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);
- if (combined_after_bytes)
- {
- /* Adjust markers for the phony deletion
- that we are about to call record_undo for. */
-
- /* Here we delete the markers that formerly
- pointed at TO ... TO + COMBINED_AFTER_BYTES.
- But because of the call to adjust_markers_for_delete, above,
- they now point at FROM ... FROM + COMBINED_AFTER_BYTES. */
- adjust_markers_for_record_delete (from, from_byte,
- from + combined_after_bytes,
- from_byte + combined_after_bytes);
-
- adjust_markers_for_record_delete (from - 1, from_byte_1,
- from, from_byte);
- }
- record_delete (from - !!combined_after_bytes, deletion);
- if (combined_after_bytes)
- /* COMBINED_AFTER_BYTES nonzero means that the above record_delete
- moved the gap by calling Fbuffer_substring. We must move the
- gap again to a proper place. */
- move_gap_both (from, from_byte);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from, deletion);
MODIFF++;
/* Relocate point as if it were a marker. */
adjust_point (from - (PT < to ? PT : to),
from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte));
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
offset_intervals (current_buffer, from, - nchars_del);
/* Adjust the overlay center as needed. This must be done after
Z -= nchars_del;
GPT = from;
GPT_BYTE = from_byte;
-
- if (combined_after_bytes)
- move_gap_both (GPT + combined_after_bytes,
- GPT_BYTE + combined_after_bytes);
-
- *(GPT_ADDR) = 0; /* Put an anchor. */
+ 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 (GPT - BEG < BEG_UNCHANGED)
+ BEG_UNCHANGED = GPT - BEG;
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
- if (combined_after_bytes)
- {
- combine_bytes (from, from_byte, combined_after_bytes);
-
- record_insert (GPT - 1, 1);
- }
+ CHECK_MARKERS ();
evaporate_overlays (from);
- signal_after_change (from, nchars_del, 0);
+
+ return deletion;
}
\f
/* Call this if you're about to change the region of BUFFER from
prepare_to_modify_buffer (start, end, NULL);
- if (start - 1 < beg_unchanged
- || (unchanged_modified == MODIFF
- && overlay_unchanged_modified == OVERLAY_MODIFF))
- beg_unchanged = start - 1;
- if (Z - end < end_unchanged
- || (unchanged_modified == MODIFF
- && overlay_unchanged_modified == OVERLAY_MODIFF))
- end_unchanged = Z - end;
+ BUF_COMPUTE_UNCHANGED (buffer, start - 1, end);
if (MODIFF <= SAVE_MODIFF)
record_first_change ();
if (!NILP (current_buffer->read_only))
Fbarf_if_buffer_read_only ();
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
+ /* Let redisplay consider other windows than selected_window
+ if modifying another buffer. */
+ if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer)
+ ++windows_or_buffers_changed;
+
if (BUF_INTERVALS (current_buffer) != 0)
{
if (preserve_ptr)
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
if (! NILP (preserve_marker)) \
{ \
*preserve_ptr = marker_position (preserve_marker); \
- unchain_marker (preserve_marker); \
+ unchain_marker (XMARKER (preserve_marker)); \
}
#define PRESERVE_START_END \
Lisp_Object preserve_marker;
struct gcpro gcpro1, gcpro2, gcpro3;
+ if (inhibit_modification_hooks)
+ return;
+
start = make_number (start_int);
end = make_number (end_int);
preserve_marker = Qnil;
call1 (Vrun_hooks, Qfirst_change_hook);
}
- /* Run the before-change-function if any.
- We don't bother "binding" this variable to nil
- because it is obsolete anyway and new code should not use it. */
- if (!NILP (Vbefore_change_function))
- {
- PRESERVE_VALUE;
- PRESERVE_START_END;
- call2 (Vbefore_change_function, FETCH_START, FETCH_END);
- }
-
/* Now run the before-change-functions if any. */
if (!NILP (Vbefore_change_functions))
{
Lisp_Object before_change_functions;
Lisp_Object after_change_functions;
struct gcpro gcpro1, gcpro2;
+ struct buffer *old = current_buffer;
+ struct buffer *new;
PRESERVE_VALUE;
PRESERVE_START_END;
args[2] = FETCH_END;
run_hook_list_with_args (before_change_functions, 3, args);
- /* "Unbind" the variables we "bound" to nil. */
- Vbefore_change_functions = before_change_functions;
- Vafter_change_functions = after_change_functions;
+ /* "Unbind" the variables we "bound" to nil. Beware a
+ buffer-local hook which changes the buffer when run (e.g. W3). */
+ if (old != current_buffer)
+ {
+ new = current_buffer;
+ set_buffer_internal (old);
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ set_buffer_internal (new);
+ }
+ else
+ {
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ }
UNGCPRO;
}
- 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,
signal_after_change (charpos, lendel, lenins)
int charpos, lendel, lenins;
{
+ if (inhibit_modification_hooks)
+ return;
+
/* If we are deferring calls to the after-change functions
and there are no before-change functions,
just record the args that we were going to use. */
if (! NILP (Vcombine_after_change_calls)
- && NILP (Vbefore_change_function) && NILP (Vbefore_change_functions)
- && NILP (current_buffer->overlays_before)
- && NILP (current_buffer->overlays_after))
+ && NILP (Vbefore_change_functions)
+ && !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 ();
- /* Run the after-change-function if any.
- We don't bother "binding" this variable to nil
- because it is obsolete anyway and new code should not use it. */
- if (!NILP (Vafter_change_function))
- call3 (Vafter_change_function,
- make_number (charpos), make_number (charpos + lenins),
- make_number (lendel));
-
if (!NILP (Vafter_change_functions))
{
Lisp_Object args[4];
Lisp_Object before_change_functions;
Lisp_Object after_change_functions;
+ struct buffer *old = current_buffer;
+ struct buffer *new;
struct gcpro gcpro1, gcpro2;
/* "Bind" before-change-functions and after-change-functions
run_hook_list_with_args (after_change_functions,
4, args);
- /* "Unbind" the variables we "bound" to nil. */
- Vbefore_change_functions = before_change_functions;
- Vafter_change_functions = after_change_functions;
+ /* "Unbind" the variables we "bound" to nil. Beware a
+ buffer-local hook which changes the buffer when run (e.g. W3). */
+ if (old != current_buffer)
+ {
+ new = current_buffer;
+ set_buffer_internal (old);
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ set_buffer_internal (new);
+ }
+ else
+ {
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ }
UNGCPRO;
}
- 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,
/* After an insertion, call the text properties
insert-behind-hooks or insert-in-front-hooks. */
if (lendel == 0)
- report_interval_modification (charpos, charpos + lenins);
+ report_interval_modification (make_number (charpos),
+ make_number (charpos + lenins));
}
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'. */)
+ ()
{
- register Lisp_Object val;
- 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;
+
record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
Fset_buffer (combine_after_change_buffer);
/* Scan the various individual changes,
accumulating the range info in BEG, END and CHANGE. */
for (tail = combine_after_change_list; CONSP (tail);
- tail = XCONS (tail)->cdr)
+ tail = XCDR (tail))
{
Lisp_Object elt;
int thisbeg, thisend, thischange;
/* Extract the info from the next element. */
- elt = XCONS (tail)->car;
+ elt = XCAR (tail);
if (! CONSP (elt))
continue;
- thisbeg = XINT (XCONS (elt)->car);
+ thisbeg = XINT (XCAR (elt));
- elt = XCONS (elt)->cdr;
+ elt = XCDR (elt);
if (! CONSP (elt))
continue;
- thisend = XINT (XCONS (elt)->car);
+ thisend = XINT (XCAR (elt));
- elt = XCONS (elt)->cdr;
+ elt = XCDR (elt);
if (! CONSP (elt))
continue;
- thischange = XINT (XCONS (elt)->car);
+ thischange = XINT (XCAR (elt));
/* Merge this range into the accumulated range. */
change += thischange;
that was changed. */
begpos = BEG + beg;
endpos = Z - end;
-
+
/* We are about to handle these, so discard them. */
combine_after_change_list = Qnil;
record_unwind_protect (Fcombine_after_change_execute_1,
Vcombine_after_change_calls);
signal_after_change (begpos, endpos - begpos - change, endpos - begpos);
+ update_compositions (begpos, endpos, CHECK_ALL);
- return unbind_to (count, val);
+ return unbind_to (count, Qnil);
}
\f
+void
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,
+ 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,
+ 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) */