/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985, 86, 93, 94, 95, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1985, 86,93,94,95,97,98, 1999 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#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 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));
+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_point P_ ((int, int));
Lisp_Object Fcombine_after_change_execute ();
/* 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;
+
+#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 (XSYMBOL (tail) != XSYMBOL (Qnil))
+ {
+ 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 ();
-#define DEFAULT_NONASCII_INSERT_OFFSET 0x800
+ tail = XMARKER (tail)->chain;
+ }
+}
\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;
Lisp_Object marker;
register struct Lisp_Marker *m;
register int charpos;
- /* This is what GAP_SIZE will be when this deletion is finished. */
- int coming_gap_size = GAP_SIZE + to_byte - from_byte;
marker = BUF_MARKERS (current_buffer);
m->bytepos = from_byte;
}
- /* In a single-byte buffer, a marker's two positions must be equal. */
- if (Z == Z_BYTE)
- {
- register int i = m->bytepos;
+ marker = m->chain;
+ }
+}
-#if 0
- /* We use FROM_BYTE here instead of GPT_BYTE
- because FROM_BYTE is where the gap will be after the deletion. */
- if (i > from_byte + coming_gap_size)
- i -= coming_gap_size;
- else if (i > from_byte)
- i = from_byte;
-#endif
+\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. */
- if (m->charpos != i)
- abort ();
- }
+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 at CHARPOS / BYTEPOS
- consisting of NCHARS chars, which are NBYTES bytes.
+/* 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).
- 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, before_markers)
- register int from, from_byte, to, to_byte, before_markers;
+adjust_markers_for_insert (from, from_byte, to, to_byte,
+ combined_before_bytes, combined_after_bytes,
+ before_markers)
+ register int from, from_byte, to, to_byte;
+ int combined_before_bytes, combined_after_bytes, before_markers;
{
Lisp_Object marker;
int adjusted = 0;
while (!NILP (marker))
{
register struct Lisp_Marker *m = XMARKER (marker);
- if (m->bytepos == from_byte
- && (m->insertion_type || before_markers))
+
+ /* 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.) */
+ if (Z == Z_BYTE)
{
- m->bytepos += nbytes;
- m->charpos += nchars;
- if (m->insertion_type)
- adjusted = 1;
+ if (m->charpos != m->bytepos)
+ abort ();
}
- else if (m->bytepos > from_byte)
+
+ if (m->bytepos == from_byte)
{
- m->bytepos += nbytes;
- m->charpos += nchars;
+ if (m->insertion_type || before_markers)
+ {
+ m->bytepos = to_byte + combined_after_bytes;
+ m->charpos = to - combined_before_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);
+ 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. */
+ m->bytepos += combined_before_bytes;
+ if (combined_before_bytes == nbytes)
+ /* All new bytes plus combined_after_bytes (if any)
+ are combined. */
+ m->bytepos += combined_after_bytes;
+ }
}
-
- /* In a single-byte buffer, a marker's two positions must be equal. */
- if (Z == Z_BYTE)
+ /* 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)
{
- register int i = m->bytepos;
-
-#if 0
- if (i > GPT_BYTE + GAP_SIZE)
- i -= GAP_SIZE;
- else if (i > GPT_BYTE)
- i = GPT_BYTE;
-#endif
-
- if (m->charpos != i)
- abort ();
+ /* Put it after the combining bytes. */
+ m->bytepos = to_byte + combined_after_bytes;
+ m->charpos = to - combined_before_bytes;
+ /* 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 - combined_after_bytes - combined_before_bytes;
}
marker = m->chain;
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).
+
+ See the comment of adjust_markers_for_insert for the args
+ COMBINED_BEFORE_BYTES and COMBINED_AFTER_BYTES. */
+
+static void
+adjust_markers_for_replace (from, from_byte, old_chars, old_bytes,
+ new_chars, new_bytes,
+ combined_before_bytes, combined_after_bytes)
+ int from, from_byte, old_chars, old_bytes, new_chars, new_bytes;
+ int combined_before_bytes, combined_after_bytes;
+{
+ Lisp_Object marker = BUF_MARKERS (current_buffer);
+ int prev_to_byte = from_byte + old_bytes;
+ int diff_chars
+ = (new_chars - combined_before_bytes) - (old_chars + combined_after_bytes);
+ int diff_bytes = new_bytes - old_bytes;
+
+ while (!NILP (marker))
+ {
+ register struct Lisp_Marker *m = XMARKER (marker);
+
+ if (m->bytepos >= prev_to_byte
+ && (old_bytes != 0
+ /* If this is an insertion (replacing 0 chars),
+ reject the case of a marker that is at the
+ insertion point and should stay before the insertion. */
+ || m->bytepos > from_byte || m->insertion_type))
+ {
+ if (m->bytepos < prev_to_byte + combined_after_bytes)
+ {
+ /* Put it after the combining bytes. */
+ m->bytepos = from_byte + new_bytes + combined_after_bytes;
+ m->charpos = from + new_chars - combined_before_bytes;
+ }
+ else
+ {
+ m->charpos += diff_chars;
+ m->bytepos += diff_bytes;
+ }
+ }
+ else if (m->bytepos >= from_byte)
+ {
+ m->charpos = from;
+ m->bytepos = from_byte + combined_before_bytes;
+ /* If all new bytes are combined in addition to that there
+ are after combining bytes, we must set byte position of
+ the marker after the after combining bytes. */
+ if (combined_before_bytes == new_bytes)
+ m->bytepos += combined_after_bytes;
+ }
+
+ marker = m->chain;
+ }
+
+ CHECK_MARKERS ();
+}
+
+\f
/* Make the gap NBYTES_ADDED bytes longer. */
void
{
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++ = (c & 0177) + 0200;
+ int thislen, c, c_save;
+ c = c_save = 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--;
+ bytes_left -= thislen;
nchars++;
}
return nchars;
unsigned char workbuf[4], *str;
int len;
- if (c >= 0200 && c < 0400)
+ if (c < 0400
+ && (c >= 0240
+ || (c >= 0200 && !NILP (Vnonascii_translation_table))))
{
- if (nonascii_insert_offset > 0)
- c += nonascii_insert_offset;
- else
- c += DEFAULT_NONASCII_INSERT_OFFSET;
-
+ c = unibyte_char_to_multibyte (c);
len = CHAR_STRING (c, workbuf, str);
bcopy (str, to_addr, len);
to_addr += len;
for (i = 0; i < nbytes; i++)
{
unsigned int c = *ptr++;
- if (c >= 0200 && c < 0400)
+
+ if (c < 0200 || (c < 0240 && NILP (Vnonascii_translation_table)))
+ outgoing_nbytes++;
+ else
{
- if (nonascii_insert_offset > 0)
- c += nonascii_insert_offset;
- else
- c += DEFAULT_NONASCII_INSERT_OFFSET;
+ c = unibyte_char_to_multibyte (c);
+ outgoing_nbytes += CHAR_BYTES (c);
}
- outgoing_nbytes += XINT (Fchar_bytes (make_number (c)));
}
return outgoing_nbytes;
void
insert (string, nbytes)
register unsigned char *string;
- register nbytes;
+ register int nbytes;
{
if (nbytes > 0)
{
void
insert_and_inherit (string, nbytes)
register unsigned char *string;
- register nbytes;
+ register int nbytes;
{
if (nbytes > 0)
{
signal_after_change (opoint, 0, PT - opoint);
}
}
-\f
+
/* Subroutine used by the insert functions above. */
void
register int nbytes;
int inherit, prepare, before_markers;
{
- register Lisp_Object temp;
- int nchars = chars_in_text (string, nbytes);
+ insert_1_both (string, chars_in_text (string, nbytes), nbytes,
+ inherit, prepare, before_markers);
+}
+\f
+/* See if the byte sequence at STR1 of length LEN1 combine with the
+ byte sequence at STR2 of length LEN2 to form a single composite
+ character. If so, return the number of bytes at the start of STR2
+ which combine in this way. Otherwise, return 0. If STR3 is not
+ NULL, it is a byte sequence of length LEN3 to be appended to STR1
+ before checking the combining. */
+int
+count_combining_composition (str1, len1, str2, len2, str3, len3)
+ unsigned char *str1, *str2, *str3;
+ int len1, len2, len3;
+{
+ int len = len1 + len2 + len3;
+ unsigned char *buf = (unsigned char *) alloca (len + 1);
+ int bytes;
- if (prepare)
- prepare_to_modify_buffer (PT, PT, NULL);
+ bcopy (str1, buf, len1);
+ if (str3)
+ {
+ bcopy (str3, buf + len1, len3);
+ len1 += len3;
+ }
+ bcopy (str2, buf + len1 , len2);
+ buf[len] = 0;
+ PARSE_MULTIBYTE_SEQ (buf, len, bytes);
+ return (bytes <= len1 ? 0 : bytes - len1);
+}
- if (PT != GPT)
- move_gap_both (PT, PT_BYTE);
- if (GAP_SIZE < nbytes)
- make_gap (nbytes - GAP_SIZE);
+/* 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. */
- record_insert (PT, nchars);
- MODIFF++;
+int
+count_combining_before (string, length, pos, pos_byte)
+ unsigned char *string;
+ int length;
+ int pos, pos_byte;
+{
+ int len, combining_bytes;
+ unsigned char *p;
- bcopy (string, GPT_ADDR, nbytes);
+ 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;
+
+ /* A sequence of a composite character requires a special handling. */
+ if (*p == LEADING_CODE_COMPOSITION)
+ return count_combining_composition (p, len, string, length, NULL, 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);
+}
-#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);
-#endif
+/* 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. */
- 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. */
- adjust_overlays_for_insert (PT, nchars);
- adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, PT_BYTE + nbytes,
- before_markers);
- adjust_point (nchars, nbytes);
+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 (GPT_BYTE < GPT)
- abort ();
+ 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]))
+ {
+ 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;
+ /* A sequence of a composite character requires a special handling. */
+ if (p[i] == LEADING_CODE_COMPOSITION)
+ return count_combining_composition (p + i, pos_byte - 1 - i,
+ bufp, Z_BYTE - pos_byte,
+ string, length);
+ 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;
+ /* A sequence of a composite character requires a special handling. */
+ if (string[i] == LEADING_CODE_COMPOSITION)
+ return count_combining_composition (string + i, length - i,
+ bufp, Z_BYTE - pos_byte, NULL, 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);
+}
-#ifdef USE_TEXT_PROPERTIES
- if (!inherit && BUF_INTERVALS (current_buffer) != 0)
- Fset_text_properties (make_number (PT - nchars), make_number (PT),
- Qnil, Qnil);
-#endif
+/* 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.
+
+ This function does not adjust markers for byte combining. That
+ should be done in advance by the functions
+ adjust_markers_for_insert or adjust_markers_for_replace. */
+
+static void
+combine_bytes (pos, pos_byte, nbytes)
+ int pos, pos_byte, nbytes;
+{
+ adjust_overlays_for_delete (pos, nbytes);
+
+ 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);
+
+ if (BUF_INTERVALS (current_buffer) != 0)
+ /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
+ offset_intervals (current_buffer, pos, - nbytes);
}
+void
+byte_combining_error ()
+{
+ error ("Byte combining across boundary of accessible buffer text inhibitted");
+}
+
+/* If we are going to combine bytes at POS which is at a narrowed
+ region boundary, signal an error. */
+#define CHECK_BYTE_COMBINING_FOR_INSERT(pos) \
+ do { \
+ if ((combined_before_bytes && pos == BEGV) \
+ || (combined_after_bytes && pos == ZV)) \
+ byte_combining_error (); \
+ } while (0)
+
+\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. */
register int nchars, nbytes;
int inherit, prepare, before_markers;
{
- register Lisp_Object temp;
+ int combined_before_bytes, combined_after_bytes;
+
+ 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)
if (GAP_SIZE < nbytes)
make_gap (nbytes - GAP_SIZE);
- record_insert (PT, nchars);
+ combined_before_bytes
+ = count_combining_before (string, nbytes, PT, PT_BYTE);
+ combined_after_bytes
+ = count_combining_after (string, nbytes, PT, PT_BYTE);
+ CHECK_BYTE_COMBINING_FOR_INSERT (PT);
+
+ /* 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)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT, deletion);
+ }
+
+ if (combined_before_bytes)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT - 1, deletion);
+ }
+
+ record_insert (PT - !!combined_before_bytes,
+ nchars - combined_before_bytes + !!combined_before_bytes);
MODIFF++;
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, nchars);
-#endif
-
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;
ZV_BYTE += nbytes;
Z_BYTE += nbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- adjust_overlays_for_insert (PT, nchars);
- adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, PT_BYTE + nbytes,
- before_markers);
- adjust_point (nchars, nbytes);
+
+ if (combined_after_bytes)
+ move_gap_both (GPT + combined_after_bytes,
+ GPT_BYTE + combined_after_bytes);
if (GPT_BYTE < GPT)
abort ();
+ 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 - nchars), make_number (PT),
+ Fset_text_properties (make_number (PT), make_number (PT + nchars),
Qnil, Qnil);
#endif
+
+ {
+ int pos = PT, pos_byte = PT_BYTE;
+
+ 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;
+ insert_from_string_1 (string, pos, pos_byte, length, length_byte,
+ inherit, 0);
+ signal_after_change (opoint, 0, PT - opoint);
}
/* 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;
+ insert_from_string_1 (string, pos, pos_byte, length, length_byte,
+ inherit, 1);
+ signal_after_change (opoint, 0, PT - opoint);
}
/* 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;
+ 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 (nchars == nbytes)
+ else if (! STRING_MULTIBYTE (string))
outgoing_nbytes
= count_size_as_multibyte (&XSTRING (string)->data[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);
-
- record_insert (PT, nchars);
- MODIFF++;
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,
+ STRING_MULTIBYTE (string),
! NILP (current_buffer->enable_multibyte_characters));
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- offset_intervals (current_buffer, PT, nchars);
+ /* 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. */
+
+ 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);
+ {
+ unsigned char save = *(GPT_ADDR);
+ *(GPT_ADDR) = 0;
+ CHECK_BYTE_COMBINING_FOR_INSERT (PT);
+ *(GPT_ADDR) = save;
+ }
+
+ /* 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)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT, deletion);
+ }
- GAP_SIZE -= nbytes;
+ if (combined_before_bytes)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT - 1, deletion);
+ }
+
+ record_insert (PT - !!combined_before_bytes,
+ nchars - combined_before_bytes + !!combined_before_bytes);
+ MODIFF++;
+
+ GAP_SIZE -= outgoing_nbytes;
GPT += nchars;
ZV += nchars;
Z += nchars;
ZV_BYTE += 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 ();
+
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);
- if (GPT_BYTE < GPT)
- abort ();
+ /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
+ offset_intervals (current_buffer, PT, nchars);
- graft_intervals_into_buffer (XSTRING (string)->intervals, 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 = copy_intervals (intervals, pos, nchars);
+
+ /* Insert those intervals. */
+ graft_intervals_into_buffer (intervals, PT, nchars,
current_buffer, inherit);
- adjust_point (nchars, outgoing_nbytes);
+ {
+ 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);
+ }
}
\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);
}
static void
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;
+ int combined_before_bytes, combined_after_bytes;
+ 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))
- 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)
if (GAP_SIZE < outgoing_nbytes)
make_gap (outgoing_nbytes - GAP_SIZE);
- record_insert (PT, nchars);
- MODIFF++;
-
if (from < BUF_GPT (buf))
{
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 USE_TEXT_PROPERTIES
- if (BUF_INTERVALS (current_buffer) != 0)
- offset_intervals (current_buffer, PT, nchars);
-#endif
+ /* 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);
+ {
+ unsigned char save = *(GPT_ADDR);
+ *(GPT_ADDR) = 0;
+ CHECK_BYTE_COMBINING_FOR_INSERT (PT);
+ *(GPT_ADDR) = save;
+ }
+
+ /* 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)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT, deletion);
+ }
+
+ if (combined_before_bytes)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (PT - 1, deletion);
+ }
+
+ record_insert (PT - !!combined_before_bytes,
+ nchars - combined_before_bytes + !!combined_before_bytes);
+ MODIFF++;
GAP_SIZE -= outgoing_nbytes;
GPT += nchars;
ZV_BYTE += outgoing_nbytes;
Z_BYTE += outgoing_nbytes;
if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
- adjust_overlays_for_insert (PT, nchars);
- adjust_markers_for_insert (PT, PT_BYTE, PT + nchars,
- PT_BYTE + outgoing_nbytes, 0);
- adjust_point (nchars, outgoing_nbytes);
+
+ if (combined_after_bytes)
+ move_gap_both (GPT + combined_after_bytes,
+ GPT_BYTE + combined_after_bytes);
if (GPT_BYTE < GPT)
abort ();
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- graft_intervals_into_buffer (copy_intervals (BUF_INTERVALS (buf),
- from, nchars),
- PT - nchars, nchars,
- current_buffer, inherit);
+ 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);
+
+#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. */
+ intervals = BUF_INTERVALS (buf);
+ if (outgoing_nbytes < BUF_Z_BYTE (buf) - BUF_BEG_BYTE (buf))
+ 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);
+ }
}
\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. */
+
+void
+adjust_before_replace (from, from_byte, to, to_byte)
+ int from, from_byte, to, to_byte;
+{
+ Lisp_Object deletion;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
+
+ CHECK_MARKERS ();
+
+ adjust_markers_for_delete (from, from_byte, to, to_byte);
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from, deletion);
+
+ adjust_overlays_for_delete (from, to - from);
+}
+
+/* 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_after_replace (from, from_byte, prev_text, len, len_byte)
+ int from, from_byte, len, len_byte;
+ Lisp_Object prev_text;
+{
+ 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);
+ /* This flag tells if we combine some bytes with a character before
+ FROM. This happens even if combined_before_bytes is zero. */
+ int combine_before = (combined_before_bytes
+ || (len == 0 && combined_after_bytes));
+
+ int nchars_del = 0, nbytes_del = 0;
+
+ if (STRINGP (prev_text))
+ {
+ nchars_del = XSTRING (prev_text)->size;
+ nbytes_del = STRING_BYTES (XSTRING (prev_text));
+ }
+
+ if ((combine_before && from == BEGV)
+ || (combined_after_bytes && from == ZV))
+ {
+ /* We can't combine bytes nor signal an error here. So, let's
+ pretend that the new text is just a single space. */
+ len = len_byte = 1;
+ combined_before_bytes = combined_after_bytes = 0;
+ *(GPT_ADDR) = ' ';
+ }
+
+ if (combined_after_bytes)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ deletion = make_buffer_string_both (from, from_byte,
+ from + combined_after_bytes,
+ from_byte + combined_after_bytes,
+ 1);
+
+ adjust_markers_for_record_delete (from, from_byte,
+ from + combined_after_bytes,
+ from_byte + combined_after_bytes);
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from + nchars_del, deletion);
+ }
+
+ if (combined_before_bytes
+ || (len_byte == 0 && combined_after_bytes > 0))
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from - 1, 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. */
+
+ /* The gap should be at character boundary. */
+ if (combined_after_bytes)
+ move_gap_both (GPT + combined_after_bytes,
+ GPT_BYTE + combined_after_bytes);
+
+ adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del,
+ len, len_byte,
+ combined_before_bytes, combined_after_bytes);
+ if (! EQ (current_buffer->undo_list, Qt))
+ {
+ if (nchars_del > 0)
+ record_delete (from - combine_before, prev_text);
+ if (combine_before)
+ record_insert (from - 1, len - combined_before_bytes + 1);
+ else
+ 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);
+#ifdef USE_TEXT_PROPERTIES
+ if (BUF_INTERVALS (current_buffer) != 0)
+ {
+ offset_intervals (current_buffer, from, len - nchars_del);
+ }
+#endif
+
+ {
+ if (from < PT)
+ adjust_point (len - nchars_del, len_byte - nbytes_del);
+
+ if (combined_after_bytes)
+ {
+ if (combined_before_bytes == len_byte)
+ /* This is the case that all new bytes are combined. */
+ combined_before_bytes += combined_after_bytes;
+ else
+ combine_bytes (from + len, from_byte + len_byte,
+ combined_after_bytes);
+ }
+ if (combined_before_bytes)
+ combine_bytes (from, from_byte, combined_before_bytes);
+ }
+
+ /* 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
+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);
+}
+
/* 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)
+replace_range (from, to, new, prepare, inherit, markers)
Lisp_Object new;
- int from, to, prepare, inherit;
+ int from, to, prepare, inherit, markers;
{
int inschars = XSTRING (new)->size;
- int insbytes = XSTRING (new)->size_byte;
+ int insbytes = STRING_BYTES (XSTRING (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;
+ INTERVAL intervals;
+ int outgoing_insbytes = insbytes;
+ Lisp_Object deletion;
+
+ CHECK_MARKERS ();
GCPRO1 (new);
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))
if (to < GPT)
gap_left (to, to_byte, 0);
- /* 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);
+ /* 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. */
+ deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1);
- record_delete (from, nchars_del);
+ 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;
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);
- record_insert (from, inschars);
+ /* 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));
- bcopy (XSTRING (new)->data, GPT_ADDR, insbytes);
+ /* 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. */
- /* Relocate point as if it were a marker. */
- if (from < PT)
- adjust_point (from + inschars - (PT < to ? PT : to),
- (from_byte + insbytes
- - (PT_BYTE < to_byte ? PT_BYTE : to_byte)));
+ combined_before_bytes
+ = count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte);
+ combined_after_bytes
+ = count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte);
-#ifdef USE_TEXT_PROPERTIES
- offset_intervals (current_buffer, PT, inschars - nchars_del);
-#endif
+ if ((combined_before_bytes && from == BEGV)
+ || (combined_after_bytes && from == ZV))
+ {
+ /* Bytes are being combined across the region boundary. We
+ should avoid it. We recover the original contents before
+ signaling an error. */
+ bcopy (XSTRING (deletion)->data, GPT_ADDR, nbytes_del);
+ GAP_SIZE -= nbytes_del;
+ ZV += nchars_del;
+ Z += nchars_del;
+ ZV_BYTE += nbytes_del;
+ Z_BYTE += nbytes_del;
+ GPT = from + nchars_del;
+ GPT_BYTE = from_byte + nbytes_del;
+ *(GPT_ADDR) = 0; /* Put an anchor. */
+ if (markers)
+ adjust_markers_for_insert (from, from_byte, to, to_byte, 0, 0, 0);
+ UNGCPRO;
+ byte_combining_error ();
+ GCPRO1 (new);
+ }
+
+ /* 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)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ deletion = make_buffer_string_both (from, from_byte,
+ from + combined_after_bytes,
+ from_byte + combined_after_bytes,
+ 1);
+
+ adjust_markers_for_record_delete (from, from_byte,
+ from + combined_after_bytes,
+ from_byte + combined_after_bytes);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from + nchars_del, deletion);
+ }
+
+ if (combined_before_bytes)
+ {
+ Lisp_Object deletion;
+ deletion = Qnil;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ 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);
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from - 1, deletion);
+ }
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ {
+ record_delete (from - !!combined_before_bytes, deletion);
+ record_insert (from - !!combined_before_bytes,
+ (inschars - combined_before_bytes
+ + !!combined_before_bytes));
+ }
- GAP_SIZE -= insbytes;
+ GAP_SIZE -= outgoing_insbytes;
GPT += inschars;
ZV += inschars;
Z += inschars;
- GPT_BYTE += insbytes;
- ZV_BYTE += insbytes;
- ZV_BYTE += insbytes;
+ GPT_BYTE += outgoing_insbytes;
+ ZV_BYTE += outgoing_insbytes;
+ 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);
- adjust_markers_for_insert (from, from_byte, from + inschars,
- from_byte + insbytes, 0);
+ if (markers)
+ adjust_markers_for_insert (from, from_byte,
+ from + inschars, from_byte + outgoing_insbytes,
+ combined_before_bytes, combined_after_bytes, 0);
#ifdef USE_TEXT_PROPERTIES
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- graft_intervals_into_buffer (XSTRING (new)->intervals, from,
- inschars, current_buffer, inherit);
+ 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);
#endif
- if (insbytes == 0)
+ /* 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 (combined_after_bytes)
+ {
+ if (combined_before_bytes == outgoing_insbytes)
+ /* This is the case that all new bytes are combined. */
+ combined_before_bytes += combined_after_bytes;
+ else
+ combine_bytes (from + inschars, from_byte + outgoing_insbytes,
+ combined_after_bytes);
+ }
+ if (combined_before_bytes)
+ combine_bytes (from, from_byte, combined_before_bytes);
+
+ /* As byte combining will decrease Z, we must check this again. */
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+
+ if (outgoing_insbytes == 0)
evaporate_overlays (from);
+ CHECK_MARKERS ();
+
MODIFF++;
UNGCPRO;
- signal_after_change (from, nchars_del, inschars);
+ signal_after_change (from, nchars_del, GPT - from);
}
\f
/* Delete characters in current buffer
from_byte = CHAR_TO_BYTE (from);
to_byte = CHAR_TO_BYTE (to);
- del_range_2 (from, to, from_byte, to_byte);
+ del_range_2 (from, from_byte, to, to_byte);
+ signal_after_change (from, to - from, 0);
}
/* Like del_range_1 but args are byte positions, not char positions. */
to_byte = CHAR_TO_BYTE (to);
}
- del_range_2 (from, to, from_byte, to_byte);
+ del_range_2 (from, from_byte, to, to_byte);
+ signal_after_change (from, to - from, 0);
}
/* Like del_range_1, but positions are specified both as charpos
and bytepos. */
void
-del_range_both (from, to, from_byte, to_byte, prepare)
- int from, to, from_byte, to_byte, prepare;
+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)
to_byte = CHAR_TO_BYTE (to);
}
- del_range_2 (from, to, from_byte, to_byte);
+ del_range_2 (from, from_byte, to, to_byte);
+ signal_after_change (from, to - from, 0);
}
/* Delete a range of text, specified both as character positions
while FROM_BYTE and TO_BYTE are byte positions. */
void
-del_range_2 (from, to, from_byte, to_byte)
- int from, to, from_byte, to_byte;
+del_range_2 (from, from_byte, to, to_byte)
+ int from, from_byte, to, to_byte;
{
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),
+ Z_BYTE - to_byte, from, from_byte);
+ if (combined_after_bytes)
+ {
+ if (from == BEGV || to == ZV)
+ byte_combining_error ();
+ from_byte_1 = from_byte;
+ DEC_POS (from_byte_1);
+ }
+ else
+ from_byte_1 = from_byte;
+
+ if (! EQ (current_buffer->undo_list, Qt))
+ deletion
+ = make_buffer_string_both (from - !!combined_after_bytes,
+ from_byte_1,
+ to + combined_after_bytes,
+ to_byte + combined_after_bytes, 1);
+ if (combined_after_bytes)
+ /* COMBINED_AFTER_BYTES nonzero means that the above code moved
+ the gap. We must move the gap again to a proper place. */
+ move_gap_both (from, from_byte);
+
/* 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, nchars_del);
+ 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);
+ }
+ if (! EQ (current_buffer->undo_list, Qt))
+ record_delete (from - !!combined_after_bytes, deletion);
MODIFF++;
/* Relocate point as if it were a marker. */
/* Adjust the overlay center as needed. This must be done after
adjusting the markers that bound the overlays. */
- adjust_overlays_for_delete (from_byte, nchars_del);
+ adjust_overlays_for_delete (from, nchars_del);
GAP_SIZE += nbytes_del;
ZV_BYTE -= nbytes_del;
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 (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)
+ {
+ /* Adjust markers for byte combining. As we have already
+ adjuted markers without concerning byte combining, here we
+ must concern only byte combining. */
+ adjust_markers_for_replace (from, from_byte, 0, 0, 0, 0,
+ 0, combined_after_bytes);
+ combine_bytes (from, from_byte, combined_after_bytes);
+
+ record_insert (GPT - 1, 1);
+
+ if (Z - GPT < END_UNCHANGED)
+ END_UNCHANGED = Z - GPT;
+ }
+
+ CHECK_MARKERS ();
evaporate_overlays (from);
- signal_after_change (from, nchars_del, 0);
}
\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 ();
+ /* Let redisplay consider other windows than selected_window
+ if modifying another buffer. */
+ if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer)
+ ++windows_or_buffers_changed;
+
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
if (BUF_INTERVALS (current_buffer) != 0)
{
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;
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. */
/* 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
"This function is for use internally in `combine-after-change-calls'.")
()
{
- register Lisp_Object val;
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);
/* 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;
Vcombine_after_change_calls);
signal_after_change (begpos, endpos - begpos - change, endpos - begpos);
- return unbind_to (count, val);
+ 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.");
+ "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