/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985, 1986, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1985, 86,93,94,95,97,98, 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include "lisp.h"
#include "intervals.h"
#include "buffer.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))
+#define max(x, y) ((x) > (y) ? (x) : (y))
-static void insert_from_string_1 ();
+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 ();
-static void gap_right ();
-static void adjust_markers ();
-static void adjust_point ();
+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));
+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 ();
+
+/* Non-nil means don't call the after-change-functions right away,
+ just record an element in Vcombine_after_change_calls_list. */
+Lisp_Object Vcombine_after_change_calls;
+
+/* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT)
+ describing changes which happened while combine_after_change_calls
+ was nonzero. We use this to decide how to call them
+ once the deferral ends.
+
+ In each element.
+ BEG-UNCHANGED is the number of chars before the changed range.
+ END-UNCHANGED is the number of chars after the changed range,
+ and CHANGE-AMOUNT is the number of characters inserted by the change
+ (negative for a deletion). */
+Lisp_Object combine_after_change_list;
+
+/* Buffer which combine_after_change_list is about. */
+Lisp_Object combine_after_change_buffer;
+\f
+/* Check all markers in the current buffer, looking for something invalid. */
+
+static int check_markers_debug_flag;
-/* Move gap to position `pos'.
+#define CHECK_MARKERS() \
+ if (check_markers_debug_flag) \
+ check_markers (); \
+ else
+
+void
+check_markers ()
+{
+ register Lisp_Object tail;
+ int multibyte = ! NILP (current_buffer->enable_multibyte_characters);
+
+ tail = BUF_MARKERS (current_buffer);
+
+ while (! NILP (tail))
+ {
+ if (XMARKER (tail)->buffer->text != current_buffer->text)
+ abort ();
+ if (XMARKER (tail)->charpos > Z)
+ abort ();
+ if (XMARKER (tail)->bytepos > Z_BYTE)
+ abort ();
+ if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (XMARKER (tail)->bytepos)))
+ abort ();
+
+ tail = XMARKER (tail)->chain;
+ }
+}
+\f
+/* Move gap to position CHARPOS.
Note that this can quit! */
void
-move_gap (pos)
- int pos;
+move_gap (charpos)
+ int charpos;
{
- if (pos < GPT)
- gap_left (pos, 0);
- else if (pos > GPT)
- gap_right (pos);
+ move_gap_both (charpos, charpos_to_bytepos (charpos));
}
-/* Move the gap to POS, which is less than the current GPT.
+/* Move gap to byte position BYTEPOS, which is also char position CHARPOS.
+ Note that this can quit! */
+
+void
+move_gap_both (charpos, bytepos)
+ int charpos, bytepos;
+{
+ if (bytepos < GPT_BYTE)
+ gap_left (charpos, bytepos, 0);
+ else if (bytepos > GPT_BYTE)
+ gap_right (charpos, bytepos);
+}
+
+/* Move the gap to a position less than the current GPT.
+ BYTEPOS describes the new position as a byte position,
+ and CHARPOS is the corresponding char position.
If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */
static void
-gap_left (pos, newgap)
- register int pos;
+gap_left (charpos, bytepos, newgap)
+ register int charpos, bytepos;
int newgap;
{
register unsigned char *to, *from;
register int i;
int new_s1;
- pos--;
-
if (!newgap)
- {
- if (unchanged_modified == MODIFF)
- {
- beg_unchanged = pos;
- end_unchanged = Z - pos - 1;
- }
- else
- {
- if (Z - GPT < end_unchanged)
- end_unchanged = Z - GPT;
- if (pos < beg_unchanged)
- beg_unchanged = pos;
- }
- }
+ BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT);
- i = GPT;
+ i = GPT_BYTE;
to = GAP_END_ADDR;
from = GPT_ADDR;
- new_s1 = GPT - BEG;
+ new_s1 = GPT_BYTE;
/* Now copy the characters. To move the gap down,
copy characters up. */
while (1)
{
/* I gets number of characters left to copy. */
- i = new_s1 - pos;
+ i = new_s1 - bytepos;
if (i == 0)
break;
/* If a quit is requested, stop copying now.
- Change POS to be where we have actually moved the gap to. */
+ Change BYTEPOS to be where we have actually moved the gap to. */
if (QUITP)
{
- pos = new_s1;
+ bytepos = new_s1;
+ charpos = BYTE_TO_CHAR (bytepos);
break;
}
/* Move at most 32000 chars before checking again for a quit. */
}
}
- /* Adjust markers, and buffer data structure, to put the gap at POS.
- POS is where the loop above stopped, which may be what was specified
+ /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS.
+ BYTEPOS is where the loop above stopped, which may be what was specified
or may be where a quit was detected. */
- adjust_markers (pos + 1, GPT, GAP_SIZE);
- GPT = pos + 1;
+ adjust_markers_gap_motion (bytepos, GPT_BYTE, GAP_SIZE);
+ GPT_BYTE = bytepos;
+ GPT = charpos;
+ if (bytepos < charpos)
+ abort ();
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
QUIT;
}
+/* Move the gap to a position greater than than the current GPT.
+ BYTEPOS describes the new position as a byte position,
+ and CHARPOS is the corresponding char position. */
+
static void
-gap_right (pos)
- register int pos;
+gap_right (charpos, bytepos)
+ register int charpos, bytepos;
{
register unsigned char *to, *from;
register int i;
int new_s1;
- pos--;
+ BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT);
- if (unchanged_modified == MODIFF)
- {
- beg_unchanged = pos;
- end_unchanged = Z - pos - 1;
- }
- else
- {
- if (Z - pos - 1 < end_unchanged)
- end_unchanged = Z - pos - 1;
- if (GPT - BEG < beg_unchanged)
- beg_unchanged = GPT - BEG;
- }
-
- i = GPT;
+ i = GPT_BYTE;
from = GAP_END_ADDR;
to = GPT_ADDR;
- new_s1 = GPT - 1;
+ new_s1 = GPT_BYTE;
/* Now copy the characters. To move the gap up,
copy characters down. */
while (1)
{
/* I gets number of characters left to copy. */
- i = pos - new_s1;
+ i = bytepos - new_s1;
if (i == 0)
break;
/* If a quit is requested, stop copying now.
- Change POS to be where we have actually moved the gap to. */
+ Change BYTEPOS to be where we have actually moved the gap to. */
if (QUITP)
{
- pos = new_s1;
+ bytepos = new_s1;
+ charpos = BYTE_TO_CHAR (bytepos);
break;
}
/* Move at most 32000 chars before checking again for a quit. */
}
}
- adjust_markers (GPT + GAP_SIZE, pos + 1 + GAP_SIZE, - GAP_SIZE);
- GPT = pos + 1;
+ adjust_markers_gap_motion (GPT_BYTE + GAP_SIZE, bytepos + GAP_SIZE,
+ - GAP_SIZE);
+ GPT = charpos;
+ GPT_BYTE = bytepos;
+ if (bytepos < charpos)
+ abort ();
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
QUIT;
}
-
-/* Add AMOUNT to the position of every marker in the current buffer
- whose current position is between FROM (exclusive) and TO (inclusive).
+\f
+/* Add AMOUNT to the byte position of every marker in the current buffer
+ whose current byte position is between FROM (exclusive) and TO (inclusive).
Also, any markers past the outside of that interval, in the direction
of adjustment, are first moved back to the near end of the interval
When the latter adjustment is done, if AMOUNT is negative,
we record the adjustment for undo. (This case happens only for
- deletion.) */
+ deletion.)
+
+ The markers' character positions are not altered,
+ because gap motion does not affect character positions. */
+
+int adjust_markers_test;
static void
-adjust_markers (from, to, amount)
+adjust_markers_gap_motion (from, to, amount)
register int from, to, amount;
{
+ /* Now that a marker has a bytepos, not counting the gap,
+ nothing needs to be done here. */
+#if 0
Lisp_Object marker;
register struct Lisp_Marker *m;
register int mpos;
while (!NILP (marker))
{
m = XMARKER (marker);
- mpos = m->bufpos;
+ mpos = m->bytepos;
if (amount > 0)
{
if (mpos > to && mpos < to + amount)
- mpos = to + amount;
+ {
+ if (adjust_markers_test)
+ abort ();
+ mpos = to + amount;
+ }
}
else
{
but then this range contains no markers. */
if (mpos > from + amount && mpos <= from)
{
- record_marker_adjustment (marker, from + amount - mpos);
+ if (adjust_markers_test)
+ abort ();
mpos = from + amount;
}
}
m->bufpos = mpos;
marker = m->chain;
}
+#endif
}
+\f
+/* Adjust all markers for a deletion
+ whose range in bytes is FROM_BYTE to TO_BYTE.
+ The range in charpos is FROM to TO.
-/* Adjust markers whose insertion-type is t
- for an insertion of AMOUNT characters at POS. */
+ This function assumes that the gap is adjacent to
+ or inside of the range being deleted. */
+
+void
+adjust_markers_for_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 (charpos > Z)
+ abort ();
+
+ /* If the marker is after the deletion,
+ relocate by number of chars / bytes deleted. */
+ if (charpos > to)
+ {
+ 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)
+ {
+ 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. */
+ 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. */
+ record_marker_adjustment (marker, charpos - to);
+
+ m->charpos = from;
+ m->bytepos = from_byte;
+ }
+ /* 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. */
+ record_marker_adjustment (marker, to - from);
+ }
+
+ 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).
+
+ 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 (pos, amount)
- register int pos, amount;
+adjust_markers_for_insert (from, from_byte, to, to_byte, before_markers)
+ register int from, from_byte, to, to_byte;
+ int before_markers;
{
Lisp_Object marker;
+ int adjusted = 0;
+ int nchars = to - from;
+ int nbytes = to_byte - from_byte;
marker = BUF_MARKERS (current_buffer);
while (!NILP (marker))
{
register struct Lisp_Marker *m = XMARKER (marker);
- if (m->insertion_type && m->bufpos == pos)
- m->bufpos += amount;
+
+ /* In a single-byte buffer, a marker's two positions must be
+ equal. */
+ if (Z == Z_BYTE)
+ {
+ if (m->charpos != m->bytepos)
+ abort ();
+ }
+
+ if (m->bytepos == from_byte)
+ {
+ if (m->insertion_type || before_markers)
+ {
+ m->bytepos = to_byte;
+ m->charpos = to;
+ if (m->insertion_type)
+ adjusted = 1;
+ }
+ }
+ 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'. */
+ if (adjusted)
+ fix_overlays_before (current_buffer, from, to);
}
-/* Add the specified amount to point. This is used only when the value
- of point changes due to an insert or delete; it does not represent
- a conceptual change in point as a marker. In particular, point is
- not crossing any interval boundaries, so there's no need to use the
- usual SET_PT macro. In fact it would be incorrect to do so, because
- either the old or the new value of point is out of sync with the
- current set of intervals. */
+/* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters.
+
+ This is used only when the value of point changes due to an insert
+ or delete; it does not represent a conceptual change in point as a
+ marker. In particular, point is not crossing any interval
+ boundaries, so there's no need to use the usual SET_PT macro. In
+ fact it would be incorrect to do so, because either the old or the
+ new value of point is out of sync with the current set of
+ intervals. */
+
static void
-adjust_point (amount)
- int amount;
+adjust_point (nchars, nbytes)
+ int nchars, nbytes;
{
- BUF_PT (current_buffer) += amount;
+ BUF_PT (current_buffer) += nchars;
+ BUF_PT_BYTE (current_buffer) += nbytes;
+
+ /* In a single-byte buffer, the two positions must be equal. */
+ if (ZV == ZV_BYTE
+ && PT != PT_BYTE)
+ abort ();
}
\f
-/* Make the gap INCREMENT characters longer. */
+/* 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;
+{
+ Lisp_Object marker = BUF_MARKERS (current_buffer);
+ 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))
+ {
+ register struct Lisp_Marker *m = XMARKER (marker);
+
+ 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;
+ }
+
+ marker = m->chain;
+ }
+
+ CHECK_MARKERS ();
+}
+
+\f
+/* Make the gap NBYTES_ADDED bytes longer. */
void
-make_gap (increment)
- int increment;
+make_gap (nbytes_added)
+ int nbytes_added;
{
- unsigned char *result;
Lisp_Object tem;
int real_gap_loc;
+ int real_gap_loc_byte;
int old_gap_size;
/* If we have to get more space, get enough to last a while. */
- increment += 2000;
+ nbytes_added += 2000;
/* 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 - BEG + GAP_SIZE + increment
+ if (Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added
>= ((unsigned) 1 << (min (BITS_PER_INT, VALBITS) - 1)))
error ("Buffer exceeds maximum size");
- BLOCK_INPUT;
- result = BUFFER_REALLOC (BEG_ADDR, (Z - BEG + GAP_SIZE + increment));
-
- if (result == 0)
- {
- UNBLOCK_INPUT;
- memory_full ();
- }
-
- /* 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 = Qt;
real_gap_loc = GPT;
+ real_gap_loc_byte = GPT_BYTE;
old_gap_size = GAP_SIZE;
/* Call the newly allocated space a gap at the end of the whole space. */
GPT = Z + GAP_SIZE;
- GAP_SIZE = increment;
+ GPT_BYTE = Z_BYTE + GAP_SIZE;
+ GAP_SIZE = nbytes_added;
/* Move the new gap down to be consecutive with the end of the old one.
This adjusts the markers properly too. */
- gap_left (real_gap_loc + old_gap_size, 1);
+ gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1);
/* Now combine the two into one large gap. */
GAP_SIZE += old_gap_size;
GPT = real_gap_loc;
+ GPT_BYTE = real_gap_loc_byte;
+
+ /* Put an anchor. */
+ *(Z_ADDR) = 0;
Vinhibit_quit = tem;
}
\f
+/* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR.
+ FROM_MULTIBYTE says whether the incoming text is multibyte.
+ TO_MULTIBYTE says whether to store the text as multibyte.
+ If FROM_MULTIBYTE != TO_MULTIBYTE, we convert.
+
+ Return the number of bytes stored at TO_ADDR. */
+
+int
+copy_text (from_addr, to_addr, nbytes,
+ from_multibyte, to_multibyte)
+ unsigned char *from_addr;
+ unsigned char *to_addr;
+ int nbytes;
+ int from_multibyte, to_multibyte;
+{
+ if (from_multibyte == to_multibyte)
+ {
+ bcopy (from_addr, to_addr, nbytes);
+ return nbytes;
+ }
+ else if (from_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);
+ if (!SINGLE_BYTE_CHAR_P (c))
+ c = multibyte_char_to_unibyte (c, tbl);
+ *to_addr++ = c;
+ from_addr += thislen;
+ bytes_left -= thislen;
+ nchars++;
+ }
+ return nchars;
+ }
+ else
+ {
+ unsigned char *initial_to_addr = to_addr;
+
+ /* Convert single-byte to multibyte. */
+ while (nbytes > 0)
+ {
+ int c = *from_addr++;
+
+ if (c >= 0200)
+ {
+ c = unibyte_char_to_multibyte (c);
+ to_addr += CHAR_STRING (c, to_addr);
+ nbytes--;
+ }
+ else
+ /* Special case for speed. */
+ *to_addr++ = c, nbytes--;
+ }
+ return to_addr - initial_to_addr;
+ }
+}
+
+/* Return the number of bytes it would take
+ to convert some single-byte text to multibyte.
+ The single-byte text consists of NBYTES bytes at PTR. */
+
+int
+count_size_as_multibyte (ptr, nbytes)
+ unsigned char *ptr;
+ int nbytes;
+{
+ int i;
+ int outgoing_nbytes = 0;
+
+ for (i = 0; i < nbytes; i++)
+ {
+ unsigned int c = *ptr++;
+
+ if (c < 0200)
+ outgoing_nbytes++;
+ else
+ {
+ c = unibyte_char_to_multibyte (c);
+ outgoing_nbytes += CHAR_BYTES (c);
+ }
+ }
+
+ return outgoing_nbytes;
+}
+\f
/* Insert a string of specified length before point.
+ This function judges multibyteness based on
+ enable_multibyte_characters in the current buffer;
+ it never converts between single-byte and multibyte.
+
DO NOT use this for the contents of a Lisp string or a Lisp buffer!
prepare_to_modify_buffer could relocate the text. */
void
-insert (string, length)
+insert (string, nbytes)
register unsigned char *string;
- register length;
+ register int nbytes;
+{
+ if (nbytes > 0)
+ {
+ int opoint = PT;
+ insert_1 (string, nbytes, 0, 1, 0);
+ signal_after_change (opoint, 0, PT - opoint);
+ update_compositions (opoint, PT, CHECK_BORDER);
+ }
+}
+
+/* Likewise, but inherit text properties from neighboring characters. */
+
+void
+insert_and_inherit (string, nbytes)
+ register 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);
+ update_compositions (opoint, PT, CHECK_BORDER);
+ }
+}
+
+/* Insert the character C before point. Do not inherit text properties. */
+
+void
+insert_char (c)
+ int c;
+{
+ unsigned char str[MAX_MULTIBYTE_LENGTH];
+ int len;
+
+ if (! NILP (current_buffer->enable_multibyte_characters))
+ len = CHAR_STRING (c, str);
+ else
+ {
+ len = 1;
+ str[0] = c;
+ }
+
+ insert (str, len);
+}
+
+/* Insert the null-terminated string S before point. */
+
+void
+insert_string (s)
+ char *s;
+{
+ insert (s, strlen (s));
+}
+
+/* Like `insert' except that all markers pointing at the place where
+ the insertion happens are adjusted to point after it.
+ Don't use this function to insert part of a Lisp string,
+ since gc could happen and relocate it. */
+
+void
+insert_before_markers (string, nbytes)
+ unsigned char *string;
+ register int nbytes;
{
- if (length > 0)
+ if (nbytes > 0)
{
- insert_1 (string, length, 0, 1);
- signal_after_change (PT-length, 0, length);
+ int opoint = PT;
+
+ insert_1 (string, nbytes, 0, 1, 1);
+ signal_after_change (opoint, 0, PT - opoint);
+ update_compositions (opoint, PT, CHECK_BORDER);
}
}
+/* Likewise, but inherit text properties from neighboring characters. */
+
void
-insert_and_inherit (string, length)
+insert_before_markers_and_inherit (string, nbytes)
+ 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);
+ update_compositions (opoint, PT, CHECK_BORDER);
+ }
+}
+
+/* Subroutine used by the insert functions above. */
+
+void
+insert_1 (string, nbytes, inherit, prepare, before_markers)
register unsigned char *string;
- register length;
+ 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
+ which combine in this way. Otherwise, return 0. */
+
+int
+count_combining_before (string, length, pos, pos_byte)
+ unsigned char *string;
+ int length;
+ int pos, pos_byte;
{
- if (length > 0)
+ int len, combining_bytes;
+ unsigned char *p;
+
+ if (NILP (current_buffer->enable_multibyte_characters))
+ return 0;
+
+ /* 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_byte == BEG_BYTE) /* case (2) */
+ return 0;
+ 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;
+
+ 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
+ may combine. */
+ p = string + 1;
+ while (!CHAR_HEAD_P (*p) && p < string + length)
+ p++;
+
+ return (combining_bytes < p - string ? combining_bytes : p - string);
+}
+
+/* See if the bytes after POS/POS_BYTE combine with bytes
+ at the end of STRING to form a single character.
+ If so, return the number of bytes after POS/POS_BYTE
+ which combine in this way. Otherwise, return 0. */
+
+int
+count_combining_after (string, length, pos, pos_byte)
+ unsigned char *string;
+ int length;
+ int pos, pos_byte;
+{
+ int opos_byte = pos_byte;
+ int i;
+ int bytes;
+ unsigned char *bufp;
+
+ if (NILP (current_buffer->enable_multibyte_characters))
+ return 0;
+
+ /* 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]))
{
- insert_1 (string, length, 1, 1);
- signal_after_change (PT-length, 0, length);
+ i--;
}
+ if (i < 0)
+ {
+ /* 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;
+
+ bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i);
+ bufp++, pos_byte++;
+ while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++;
+
+ return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte);
}
+#endif
+
+\f
+/* Insert a sequence of NCHARS chars which occupy NBYTES bytes
+ starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS
+ are the same as in insert_1. */
+
void
-insert_1 (string, length, inherit, prepare)
+insert_1_both (string, nchars, nbytes, inherit, prepare, before_markers)
register unsigned char *string;
- register int length;
- int inherit, prepare;
+ register int nchars, nbytes;
+ int inherit, prepare, before_markers;
{
- register Lisp_Object temp;
+ if (NILP (current_buffer->enable_multibyte_characters))
+ nchars = nbytes;
if (prepare)
- prepare_to_modify_buffer (PT, PT);
+ /* 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 (PT);
- if (GAP_SIZE < length)
- make_gap (length - GAP_SIZE);
+ move_gap_both (PT, PT_BYTE);
+ if (GAP_SIZE < nbytes)
+ make_gap (nbytes - GAP_SIZE);
+
+#ifdef BYTE_COMBINING_DEBUG
+ if (count_combining_before (string, nbytes, PT, PT_BYTE)
+ || count_combining_after (string, nbytes, PT, PT_BYTE))
+ abort ();
+#endif
- record_insert (PT, length);
+ /* 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. */
+ record_insert (PT, nchars);
MODIFF++;
- bcopy (string, GPT_ADDR, length);
+ bcopy (string, GPT_ADDR, nbytes);
-#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, length);
-#endif
+ GAP_SIZE -= nbytes;
+ GPT += nchars;
+ ZV += nchars;
+ Z += nchars;
+ GPT_BYTE += nbytes;
+ ZV_BYTE += nbytes;
+ Z_BYTE += nbytes;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- GAP_SIZE -= length;
- GPT += length;
- ZV += length;
- Z += length;
- adjust_overlays_for_insert (PT, length);
- adjust_markers_for_insert (PT, length);
- adjust_point (length);
+ if (GPT_BYTE < GPT)
+ abort ();
+
+ adjust_overlays_for_insert (PT, nchars);
+ adjust_markers_for_insert (PT, PT_BYTE,
+ PT + nchars, PT_BYTE + nbytes,
+ before_markers);
+
+ if (BUF_INTERVALS (current_buffer) != 0)
+ offset_intervals (current_buffer, PT, nchars);
-#ifdef USE_TEXT_PROPERTIES
if (!inherit && BUF_INTERVALS (current_buffer) != 0)
- Fset_text_properties (make_number (PT - length), make_number (PT),
- Qnil, Qnil);
-#endif
-}
+ set_text_properties (make_number (PT), make_number (PT + nchars),
+ Qnil, Qnil, Qnil);
+ adjust_point (nchars, nbytes);
+
+ CHECK_MARKERS ();
+}
+\f
/* Insert the part of the text of STRING, a Lisp object assumed to be
- of type string, consisting of the LENGTH characters starting at
- position POS. If the text of STRING has properties, they are absorbed
- into the buffer.
+ of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes)
+ starting at position POS / POS_BYTE. If the text of STRING has properties,
+ copy them into the buffer.
It does not work to use `insert' for this, because a GC could happen
before we bcopy the stuff into the buffer, and relocate the string
without insert noticing. */
void
-insert_from_string (string, pos, length, inherit)
+insert_from_string (string, pos, pos_byte, length, length_byte, inherit)
Lisp_Object string;
- register int pos, length;
+ register int pos, pos_byte, length, length_byte;
int inherit;
{
- if (length > 0)
- {
- insert_from_string_1 (string, pos, length, inherit);
- signal_after_change (PT-length, 0, length);
- }
+ int opoint = PT;
+ 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);
}
-static void
-insert_from_string_1 (string, pos, length, inherit)
+/* Like `insert_from_string' except that all markers pointing
+ at the place where the insertion happens are adjusted to point after it. */
+
+void
+insert_from_string_before_markers (string, pos, pos_byte,
+ length, length_byte, inherit)
Lisp_Object string;
- register int pos, length;
+ register int pos, pos_byte, length, length_byte;
int inherit;
{
- register Lisp_Object temp;
+ int opoint = PT;
+ 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. */
+
+static void
+insert_from_string_1 (string, pos, pos_byte, nchars, nbytes,
+ inherit, before_markers)
+ Lisp_Object string;
+ register int pos, pos_byte, nchars, nbytes;
+ int inherit, before_markers;
+{
struct gcpro gcpro1;
+ int outgoing_nbytes = nbytes;
+ INTERVAL intervals;
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, length + Z);
- if (length + Z != XINT (temp))
- error ("maximum buffer size exceeded");
+ /* 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 (! STRING_MULTIBYTE (string))
+ outgoing_nbytes
+ = count_size_as_multibyte (&XSTRING (string)->data[pos_byte],
+ nbytes);
GCPRO1 (string);
- prepare_to_modify_buffer (PT, PT);
+ /* 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 (PT);
- if (GAP_SIZE < length)
- make_gap (length - GAP_SIZE);
-
- record_insert (PT, length);
- MODIFF++;
+ move_gap_both (PT, PT_BYTE);
+ if (GAP_SIZE < outgoing_nbytes)
+ make_gap (outgoing_nbytes - GAP_SIZE);
UNGCPRO;
- bcopy (XSTRING (string)->data, GPT_ADDR, length);
-
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- offset_intervals (current_buffer, PT, length);
+ /* Copy the string text into the buffer, perhaps converting
+ between single-byte and multibyte. */
+ copy_text (XSTRING (string)->data + 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
- GAP_SIZE -= length;
- GPT += length;
- ZV += length;
- Z += length;
- adjust_overlays_for_insert (PT, length);
- adjust_markers_for_insert (PT, length);
+ record_insert (PT, nchars);
+ MODIFF++;
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- graft_intervals_into_buffer (XSTRING (string)->intervals, PT, length,
+ GAP_SIZE -= outgoing_nbytes;
+ GPT += nchars;
+ ZV += nchars;
+ Z += nchars;
+ GPT_BYTE += outgoing_nbytes;
+ ZV_BYTE += outgoing_nbytes;
+ Z_BYTE += outgoing_nbytes;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+
+ if (GPT_BYTE < GPT)
+ abort ();
+
+ adjust_overlays_for_insert (PT, nchars);
+ adjust_markers_for_insert (PT, PT_BYTE, PT + nchars,
+ PT_BYTE + outgoing_nbytes,
+ before_markers);
+
+ offset_intervals (current_buffer, PT, nchars);
+
+ intervals = XSTRING (string)->intervals;
+ /* Get the intervals for the part of the string we are inserting. */
+ if (nbytes < STRING_BYTES (XSTRING (string)))
+ intervals = copy_intervals (intervals, pos, nchars);
+
+ /* Insert those intervals. */
+ graft_intervals_into_buffer (intervals, PT, nchars,
current_buffer, inherit);
- adjust_point (length);
+ adjust_point (nchars, outgoing_nbytes);
}
-
-/* Insert text from BUF, starting at POS and having length LENGTH, into the
+\f
+/* Insert text from BUF, NCHARS characters starting at CHARPOS, into the
current buffer. If the text in BUF has properties, they are absorbed
into the current buffer.
and relocate BUF's text before the bcopy happens. */
void
-insert_from_buffer (buf, pos, length, inherit)
+insert_from_buffer (buf, charpos, nchars, inherit)
struct buffer *buf;
- int pos, length;
+ int charpos, nchars;
int inherit;
{
- if (length > 0)
- {
- insert_from_buffer_1 (buf, pos, length, inherit);
- signal_after_change (PT-length, 0, length);
- }
+ int opoint = PT;
+
+ insert_from_buffer_1 (buf, charpos, nchars, inherit);
+ signal_after_change (opoint, 0, PT - opoint);
+ update_compositions (opoint, PT, CHECK_BORDER);
}
static void
-insert_from_buffer_1 (buf, pos, length, inherit)
+insert_from_buffer_1 (buf, from, nchars, inherit)
struct buffer *buf;
- int pos, length;
+ int from, nchars;
int inherit;
{
register Lisp_Object temp;
- int chunk;
+ 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;
+ INTERVAL intervals;
+
+ /* 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 (NILP (buf->enable_multibyte_characters))
+ {
+ 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, length + Z);
- if (length + Z != XINT (temp))
- error ("maximum buffer size exceeded");
+ XSETINT (temp, outgoing_nbytes + Z);
+ if (outgoing_nbytes + Z != XINT (temp))
+ error ("Maximum buffer size exceeded");
- prepare_to_modify_buffer (PT, PT);
+ /* 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 (PT);
- if (GAP_SIZE < length)
- make_gap (length - GAP_SIZE);
-
- record_insert (PT, length);
- MODIFF++;
+ move_gap_both (PT, PT_BYTE);
+ if (GAP_SIZE < outgoing_nbytes)
+ make_gap (outgoing_nbytes - GAP_SIZE);
- if (pos < BUF_GPT (buf))
+ if (from < BUF_GPT (buf))
{
- chunk = BUF_GPT (buf) - pos;
- if (chunk > length)
- chunk = length;
- bcopy (BUF_CHAR_ADDRESS (buf, pos), GPT_ADDR, chunk);
+ chunk = BUF_GPT_BYTE (buf) - from_byte;
+ if (chunk > incoming_nbytes)
+ chunk = incoming_nbytes;
+ /* 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;
- if (chunk < length)
- bcopy (BUF_CHAR_ADDRESS (buf, pos + chunk),
- GPT_ADDR + chunk, length - chunk);
+ chunk_expanded = chunk = 0;
+
+ if (chunk < incoming_nbytes)
+ copy_text (BUF_BYTE_ADDRESS (buf, from_byte + 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. */
+ 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, nchars);
+ MODIFF++;
+
+ GAP_SIZE -= outgoing_nbytes;
+ GPT += nchars;
+ ZV += nchars;
+ Z += nchars;
+ GPT_BYTE += outgoing_nbytes;
+ ZV_BYTE += outgoing_nbytes;
+ Z_BYTE += outgoing_nbytes;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+
+ if (GPT_BYTE < GPT)
+ abort ();
+
+ adjust_overlays_for_insert (PT, nchars);
+ adjust_markers_for_insert (PT, PT_BYTE, PT + nchars,
+ PT_BYTE + outgoing_nbytes,
+ 0);
-#ifdef USE_TEXT_PROPERTIES
if (BUF_INTERVALS (current_buffer) != 0)
- offset_intervals (current_buffer, PT, length);
-#endif
+ offset_intervals (current_buffer, PT, nchars);
- GAP_SIZE -= length;
- GPT += length;
- ZV += length;
- Z += length;
- adjust_overlays_for_insert (PT, length);
- adjust_markers_for_insert (PT, length);
- adjust_point (length);
+ /* 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))
+ {
+ 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);
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- graft_intervals_into_buffer (copy_intervals (BUF_INTERVALS (buf),
- pos, length),
- PT - length, length, current_buffer, inherit);
+ adjust_point (nchars, outgoing_nbytes);
}
+\f
+/* 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.
-/* Insert the character C before point */
+ PREV_TEXT nil means the new text was just inserted. */
void
-insert_char (c)
- unsigned char c;
+adjust_after_replace (from, from_byte, prev_text, len, len_byte)
+ int from, from_byte, len, len_byte;
+ Lisp_Object prev_text;
{
- insert (&c, 1);
-}
+ int nchars_del = 0, nbytes_del = 0;
-/* Insert the null-terminated string S before point */
+#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
-void
-insert_string (s)
- char *s;
-{
- insert (s, strlen (s));
-}
+ if (STRINGP (prev_text))
+ {
+ nchars_del = XSTRING (prev_text)->size;
+ nbytes_del = STRING_BYTES (XSTRING (prev_text));
+ }
-/* Like `insert' except that all markers pointing at the place where
- the insertion happens are adjusted to point after it.
- Don't use this function to insert part of a Lisp string,
- since gc could happen and relocate it. */
+ /* 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. */
-void
-insert_before_markers (string, length)
- unsigned char *string;
- register int length;
-{
- if (length > 0)
+ 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 (! EQ (current_buffer->undo_list, Qt))
+ {
+ if (nchars_del > 0)
+ record_delete (from, prev_text);
+ record_insert (from, len);
+ }
+
+ 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)
{
- register int opoint = PT;
- insert_1 (string, length, 0, 1);
- adjust_markers (opoint - 1, opoint, length);
- signal_after_change (PT-length, 0, length);
+ 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++;
}
+/* 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
-insert_before_markers_and_inherit (string, length)
- unsigned char *string;
- register int length;
+adjust_after_insert (from, from_byte, to, to_byte, newlen)
+ int from, from_byte, to, to_byte, newlen;
{
- if (length > 0)
- {
- register int opoint = PT;
- insert_1 (string, length, 1, 1);
- adjust_markers (opoint - 1, opoint, length);
- signal_after_change (PT-length, 0, length);
- }
+ 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);
}
-/* Insert part of a Lisp string, relocating markers after. */
+/* 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
+ from the surrounding non-deleted text. */
+
+/* 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.
+
+ But if MARKERS is 0, don't relocate markers. */
void
-insert_from_string_before_markers (string, pos, length, inherit)
- Lisp_Object string;
- register int pos, length;
- int inherit;
+replace_range (from, to, new, prepare, inherit, markers)
+ Lisp_Object new;
+ int from, to, prepare, inherit, markers;
{
- if (length > 0)
+ int inschars = XSTRING (new)->size;
+ int insbytes = STRING_BYTES (XSTRING (new));
+ int from_byte, to_byte;
+ int nbytes_del, nchars_del;
+ register Lisp_Object temp;
+ struct gcpro gcpro1;
+ INTERVAL intervals;
+ int outgoing_insbytes = insbytes;
+ Lisp_Object deletion;
+
+ CHECK_MARKERS ();
+
+ GCPRO1 (new);
+ deletion = Qnil;
+
+ if (prepare)
{
- register int opoint = PT;
- insert_from_string_1 (string, pos, length, inherit);
- adjust_markers (opoint - 1, opoint, length);
- signal_after_change (PT-length, 0, length);
+ int range_length = to - from;
+ prepare_to_modify_buffer (from, to, &from);
+ to = from + range_length;
}
+
+ UNGCPRO;
+
+ /* Make args be valid */
+ if (from < BEGV)
+ from = BEGV;
+ if (to > ZV)
+ to = ZV;
+
+ from_byte = CHAR_TO_BYTE (from);
+ to_byte = CHAR_TO_BYTE (to);
+
+ nchars_del = to - from;
+ nbytes_del = to_byte - from_byte;
+
+ if (nbytes_del <= 0 && insbytes == 0)
+ return;
+
+ /* Make OUTGOING_INSBYTES describe the text
+ as it will be inserted in this buffer. */
+
+ if (NILP (current_buffer->enable_multibyte_characters))
+ outgoing_insbytes = inschars;
+ else if (! STRING_MULTIBYTE (new))
+ outgoing_insbytes
+ = count_size_as_multibyte (XSTRING (new)->data, insbytes);
+
+ /* 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");
+
+ GCPRO1 (new);
+
+ /* 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);
+
+ /* 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);
+
+ 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;
+ ZV_BYTE -= nbytes_del;
+ Z_BYTE -= nbytes_del;
+ GPT = from;
+ GPT_BYTE = from_byte;
+ *(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 string text into the buffer, perhaps converting
+ between single-byte and multibyte. */
+ copy_text (XSTRING (new)->data, GPT_ADDR, insbytes,
+ STRING_MULTIBYTE (new),
+ ! NILP (current_buffer->enable_multibyte_characters));
+
+#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
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ {
+ record_delete (from, deletion);
+ record_insert (from, inschars);
+ }
+
+ GAP_SIZE -= outgoing_insbytes;
+ GPT += inschars;
+ ZV += inschars;
+ Z += inschars;
+ GPT_BYTE += outgoing_insbytes;
+ ZV_BYTE += outgoing_insbytes;
+ Z_BYTE += outgoing_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. */
+ adjust_overlays_for_delete (from, nchars_del);
+ adjust_overlays_for_insert (from, inschars);
+ if (markers)
+ adjust_markers_for_insert (from, from_byte,
+ from + inschars, from_byte + outgoing_insbytes,
+ 0);
+
+ 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;
+ /* Insert those intervals. */
+ graft_intervals_into_buffer (intervals, from, inschars,
+ current_buffer, inherit);
+
+ /* Relocate point as if it were a marker. */
+ if (from < PT)
+ adjust_point ((from + inschars - (PT < to ? PT : to)),
+ (from_byte + outgoing_insbytes
+ - (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, GPT - from);
+ update_compositions (from, GPT, CHECK_BORDER);
}
\f
/* Delete characters in current buffer
- from FROM up to (but not including) TO. */
+ from FROM up to (but not including) TO.
+ If TO comes before FROM, we delete nothing. */
void
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)
- register int from, to, prepare;
+Lisp_Object
+del_range_1 (from, to, prepare, ret_string)
+ int from, to, prepare, ret_string;
{
- register int numdel;
+ int from_byte, to_byte;
+ Lisp_Object deletion;
+ struct gcpro gcpro1;
/* Make args be valid */
if (from < BEGV)
if (to > ZV)
to = ZV;
- if ((numdel = to - from) <= 0)
+ if (to <= from)
+ return Qnil;
+
+ if (prepare)
+ {
+ int range_length = to - from;
+ prepare_to_modify_buffer (from, to, &from);
+ to = from + range_length;
+ }
+
+ from_byte = CHAR_TO_BYTE (from);
+ to_byte = CHAR_TO_BYTE (to);
+
+ 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. */
+
+void
+del_range_byte (from_byte, to_byte, prepare)
+ int from_byte, to_byte, prepare;
+{
+ int from, to;
+
+ /* Make args be valid */
+ if (from_byte < BEGV_BYTE)
+ from_byte = BEGV_BYTE;
+ if (to_byte > ZV_BYTE)
+ to_byte = ZV_BYTE;
+
+ if (to_byte <= from_byte)
return;
+ from = BYTE_TO_CHAR (from_byte);
+ to = BYTE_TO_CHAR (to_byte);
+
+ if (prepare)
+ {
+ int old_from = from, old_to = Z - to;
+ int range_length = to - from;
+ prepare_to_modify_buffer (from, to, &from);
+ to = from + range_length;
+
+ if (old_from != from)
+ from_byte = CHAR_TO_BYTE (from);
+ if (old_to == Z - to)
+ to_byte = CHAR_TO_BYTE (to);
+ }
+
+ 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
+ and bytepos. */
+
+void
+del_range_both (from, from_byte, to, to_byte, prepare)
+ int from, from_byte, to, to_byte, prepare;
+{
+ /* Make args be valid */
+ if (from_byte < BEGV_BYTE)
+ from_byte = BEGV_BYTE;
+ if (to_byte > ZV_BYTE)
+ to_byte = ZV_BYTE;
+
+ if (to_byte <= from_byte)
+ return;
+
+ if (from < BEGV)
+ from = BEGV;
+ if (to > ZV)
+ to = ZV;
+
+ if (prepare)
+ {
+ int old_from = from, old_to = Z - to;
+ int range_length = to - from;
+ prepare_to_modify_buffer (from, to, &from);
+ to = from + range_length;
+
+ if (old_from != from)
+ from_byte = CHAR_TO_BYTE (from);
+ if (old_to == Z - to)
+ to_byte = CHAR_TO_BYTE (to);
+ }
+
+ 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.
+ If RET_STRING is true, the deleted area is returned as a string. */
+
+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;
+ Lisp_Object deletion;
+
+ CHECK_MARKERS ();
+
+ nchars_del = to - from;
+ nbytes_del = to_byte - from_byte;
+
/* Make sure the gap is somewhere in or next to what we are deleting. */
if (from > GPT)
- gap_right (from);
+ gap_right (from, from_byte);
if (to < GPT)
- gap_left (to, 0);
+ gap_left (to, to_byte, 0);
- if (prepare)
- prepare_to_modify_buffer (from, to);
+#ifdef BYTE_COMBINING_DEBUG
+ if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte),
+ Z_BYTE - to_byte, from, from_byte))
+ abort ();
+#endif
+
+ 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.
- This has to be done before recording the deletion,
- so undo handles this after reinserting the text. */
- adjust_markers (to + GAP_SIZE, to + GAP_SIZE, - numdel - GAP_SIZE);
+ 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, numdel);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from, deletion);
MODIFF++;
/* Relocate point as if it were a marker. */
if (from < PT)
- adjust_point (from - (PT < to ? PT : to));
+ 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, - numdel);
+ offset_intervals (current_buffer, from, - nchars_del);
/* Adjust the overlay center as needed. This must be done after
adjusting the markers that bound the overlays. */
- adjust_overlays_for_delete (from, numdel);
+ adjust_overlays_for_delete (from, nchars_del);
- GAP_SIZE += numdel;
- ZV -= numdel;
- Z -= numdel;
+ GAP_SIZE += nbytes_del;
+ ZV_BYTE -= nbytes_del;
+ Z_BYTE -= nbytes_del;
+ ZV -= nchars_del;
+ Z -= nchars_del;
GPT = from;
+ GPT_BYTE = from_byte;
+ *(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;
+
+ CHECK_MARKERS ();
evaporate_overlays (from);
- signal_after_change (from, numdel, 0);
+
+ return deletion;
}
\f
-/* Call this if you're about to change the region of BUFFER from 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. */
+/* Call this if you're about to change the region of BUFFER from
+ 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. */
+
void
modify_region (buffer, start, end)
struct buffer *buffer;
if (buffer != old_buffer)
set_buffer_internal (buffer);
- prepare_to_modify_buffer (start, end);
+ prepare_to_modify_buffer (start, end, NULL);
- if (start - 1 < beg_unchanged || unchanged_modified == MODIFF)
- beg_unchanged = start - 1;
- if (Z - end < end_unchanged
- || unchanged_modified == MODIFF)
- end_unchanged = Z - end;
+ BUF_COMPUTE_UNCHANGED (buffer, start - 1, end);
if (MODIFF <= SAVE_MODIFF)
record_first_change ();
if (buffer != old_buffer)
set_buffer_internal (old_buffer);
}
+\f
+/* Check that it is okay to modify the buffer between START and END,
+ which are char positions.
-/* Check that it is okay to modify the buffer between START and END.
Run the before-change-function, if any. If intervals are in use,
verify that the text to be modified is not read-only, and call
- any modification properties the text may have. */
+ any modification properties the text may have.
+
+ If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
+ by holding its value temporarily in a marker. */
void
-prepare_to_modify_buffer (start, end)
+prepare_to_modify_buffer (start, end, preserve_ptr)
int start, end;
+ int *preserve_ptr;
{
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)
- verify_interval_modification (current_buffer, start, end);
+ {
+ if (preserve_ptr)
+ {
+ Lisp_Object preserve_marker;
+ struct gcpro gcpro1;
+ preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil);
+ GCPRO1 (preserve_marker);
+ verify_interval_modification (current_buffer, start, end);
+ *preserve_ptr = marker_position (preserve_marker);
+ unchain_marker (preserve_marker);
+ UNGCPRO;
+ }
+ else
+ verify_interval_modification (current_buffer, start, end);
+ }
#ifdef CLASH_DETECTION
if (!NILP (current_buffer->file_truename)
current_buffer->filename);
#endif /* not CLASH_DETECTION */
- signal_before_change (start, end);
+ signal_before_change (start, end, preserve_ptr);
if (current_buffer->newline_cache)
invalidate_region_cache (current_buffer,
Vdeactivate_mark = Qt;
}
\f
+/* These macros work with an argument named `preserve_ptr'
+ and a local variable named `preserve_marker'. */
+
+#define PRESERVE_VALUE \
+ if (preserve_ptr && NILP (preserve_marker)) \
+ preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil)
+
+#define RESTORE_VALUE \
+ if (! NILP (preserve_marker)) \
+ { \
+ *preserve_ptr = marker_position (preserve_marker); \
+ unchain_marker (preserve_marker); \
+ }
+
+#define PRESERVE_START_END \
+ if (NILP (start_marker)) \
+ start_marker = Fcopy_marker (start, Qnil); \
+ if (NILP (end_marker)) \
+ end_marker = Fcopy_marker (end, Qnil);
+
+#define FETCH_START \
+ (! NILP (start_marker) ? Fmarker_position (start_marker) : start)
+
+#define FETCH_END \
+ (! NILP (end_marker) ? Fmarker_position (end_marker) : end)
+
/* Signal a change to the buffer immediately before it happens.
- START_INT and END_INT are the bounds of the text to be changed. */
+ START_INT and END_INT are the bounds of the text to be changed.
+
+ If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR
+ by holding its value temporarily in a marker. */
void
-signal_before_change (start_int, end_int)
+signal_before_change (start_int, end_int, preserve_ptr)
int start_int, end_int;
+ int *preserve_ptr;
{
Lisp_Object start, end;
+ Lisp_Object start_marker, end_marker;
+ 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;
+ start_marker = Qnil;
+ end_marker = Qnil;
+ GCPRO3 (preserve_marker, start_marker, end_marker);
/* If buffer is unmodified, run a special hook for that case. */
if (SAVE_MODIFF >= MODIFF
&& !NILP (Vfirst_change_hook)
&& !NILP (Vrun_hooks))
- 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))
- call2 (Vbefore_change_function, start, end);
+ {
+ PRESERVE_VALUE;
+ PRESERVE_START_END;
+ call1 (Vrun_hooks, Qfirst_change_hook);
+ }
/* Now run the before-change-functions if any. */
if (!NILP (Vbefore_change_functions))
Lisp_Object after_change_functions;
struct gcpro gcpro1, gcpro2;
+ 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. */
/* Actually run the hook functions. */
args[0] = Qbefore_change_functions;
- args[1] = start;
- args[2] = end;
+ args[1] = FETCH_START;
+ args[2] = FETCH_END;
run_hook_list_with_args (before_change_functions, 3, args);
/* "Unbind" the variables we "bound" to nil. */
if (!NILP (current_buffer->overlays_before)
|| !NILP (current_buffer->overlays_after))
- report_overlay_modification (start, end, 0, start, end, Qnil);
+ {
+ PRESERVE_VALUE;
+ report_overlay_modification (FETCH_START, FETCH_END, 0,
+ FETCH_START, FETCH_END, Qnil);
+ }
+
+ if (! NILP (start_marker))
+ free_marker (start_marker);
+ if (! NILP (end_marker))
+ free_marker (end_marker);
+ RESTORE_VALUE;
+ UNGCPRO;
}
/* Signal a change immediately after it happens.
- POS is the address of the start of the changed text.
+ CHARPOS is the character position of the start of the changed text.
LENDEL is the number of characters of the text before the change.
(Not the whole buffer; just the part that was changed.)
LENINS is the number of characters in that part of the text
after the change. */
void
-signal_after_change (pos, lendel, lenins)
- int pos, lendel, lenins;
+signal_after_change (charpos, lendel, lenins)
+ int charpos, lendel, lenins;
{
- /* 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 (pos), make_number (pos + lenins),
- make_number (lendel));
+ 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_functions)
+ && NILP (current_buffer->overlays_before)
+ && NILP (current_buffer->overlays_after))
+ {
+ Lisp_Object elt;
+
+ if (!NILP (combine_after_change_list)
+ && current_buffer != XBUFFER (combine_after_change_buffer))
+ Fcombine_after_change_execute ();
+
+ elt = Fcons (make_number (charpos - BEG),
+ Fcons (make_number (Z - (charpos - lendel + lenins)),
+ Fcons (make_number (lenins - lendel), Qnil)));
+ combine_after_change_list
+ = Fcons (elt, combine_after_change_list);
+ combine_after_change_buffer = Fcurrent_buffer ();
+
+ return;
+ }
+
+ if (!NILP (combine_after_change_list))
+ Fcombine_after_change_execute ();
if (!NILP (Vafter_change_functions))
{
/* Actually run the hook functions. */
args[0] = Qafter_change_functions;
- XSETFASTINT (args[1], pos);
- XSETFASTINT (args[2], pos + lenins);
+ XSETFASTINT (args[1], charpos);
+ XSETFASTINT (args[2], charpos + lenins);
XSETFASTINT (args[3], lendel);
run_hook_list_with_args (after_change_functions,
4, args);
if (!NILP (current_buffer->overlays_before)
|| !NILP (current_buffer->overlays_after))
- report_overlay_modification (make_number (pos),
- make_number (pos + lenins),
+ report_overlay_modification (make_number (charpos),
+ make_number (charpos + lenins),
1,
- make_number (pos), make_number (pos + lenins),
+ make_number (charpos),
+ make_number (charpos + lenins),
make_number (lendel));
/* After an insertion, call the text properties
insert-behind-hooks or insert-in-front-hooks. */
if (lendel == 0)
- report_interval_modification (pos, pos + lenins);
+ report_interval_modification (make_number (charpos),
+ make_number (charpos + lenins));
+}
+
+Lisp_Object
+Fcombine_after_change_execute_1 (val)
+ Lisp_Object val;
+{
+ Vcombine_after_change_calls = val;
+ return val;
+}
+
+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'.")
+ ()
+{
+ int count = specpdl_ptr - specpdl;
+ 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);
+
+ /* # chars unchanged at beginning of buffer. */
+ beg = Z - BEG;
+ /* # chars unchanged at end of buffer. */
+ end = beg;
+ /* Total amount of insertion (negative for deletion). */
+ change = 0;
+
+ /* Scan the various individual changes,
+ accumulating the range info in BEG, END and CHANGE. */
+ for (tail = combine_after_change_list; CONSP (tail);
+ tail = XCDR (tail))
+ {
+ Lisp_Object elt;
+ int thisbeg, thisend, thischange;
+
+ /* Extract the info from the next element. */
+ elt = XCAR (tail);
+ if (! CONSP (elt))
+ continue;
+ thisbeg = XINT (XCAR (elt));
+
+ elt = XCDR (elt);
+ if (! CONSP (elt))
+ continue;
+ thisend = XINT (XCAR (elt));
+
+ elt = XCDR (elt);
+ if (! CONSP (elt))
+ continue;
+ thischange = XINT (XCAR (elt));
+
+ /* Merge this range into the accumulated range. */
+ change += thischange;
+ if (thisbeg < beg)
+ beg = thisbeg;
+ if (thisend < end)
+ end = thisend;
+ }
+
+ /* Get the current start and end positions of the range
+ that was changed. */
+ begpos = BEG + beg;
+ endpos = Z - end;
+
+ /* We are about to handle these, so discard them. */
+ combine_after_change_list = Qnil;
+
+ /* Now run the after-change functions for real.
+ Turn off the flag that defers them. */
+ 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, Qnil);
+}
+\f
+void
+syms_of_insdel ()
+{
+ staticpro (&combine_after_change_list);
+ 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.");
+ check_markers_debug_flag = 0;
+ DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls,
+ "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.");
+ inhibit_modification_hooks = 0;
+
+ defsubr (&Scombine_after_change_execute);
}
HCoop / bpt / emacs.git / blobdiff