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fixed function 'edit_get_prev_utf ' to obtain the correct previous utf8 character.

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Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
This commit is contained in:
Sergey 2011-10-24 11:34:30 +04:00 committed by Ilia Maslakov
parent 3e1b644f41
commit 7f9c8f0969
1 changed files with 19 additions and 68 deletions
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87
src/editor/edit.c
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@ -693,96 +693,47 @@ edit_get_byte_ptr (WEdit * edit, long byte_index)
/* --------------------------------------------------------------------------------------------- */ /* --------------------------------------------------------------------------------------------- */
static char *
edit_get_buf_ptr (WEdit * edit, long byte_index)
{
if (byte_index >= (edit->curs1 + edit->curs2))
byte_index--;
if (byte_index < 0)
return NULL;
if (byte_index >= edit->curs1)
{
unsigned long p;
p = edit->curs1 + edit->curs2 - 1;
return (char *) (edit->buffers2[p >> S_EDIT_BUF_SIZE] +
(EDIT_BUF_SIZE - (p & M_EDIT_BUF_SIZE) - 1));
}
return (char *) (edit->buffers1[byte_index >> S_EDIT_BUF_SIZE] + (0 & M_EDIT_BUF_SIZE));
}
/* --------------------------------------------------------------------------------------------- */
static int static int
edit_get_prev_utf (WEdit * edit, long byte_index, int *char_width) edit_get_prev_utf (WEdit * edit, long byte_index, int *char_width)
{ {
gchar *str, *buf = NULL; int i, res;
int res = -1; gchar utf8_buf[3 * UTF8_CHAR_LEN + 1];
gunichar ch; gchar *str;
gchar *next_ch = NULL; gchar *cursor_buf_ptr;
int width = 0;
if (byte_index > 0) if (byte_index > (edit->curs1 + edit->curs2) || byte_index <= 0)
byte_index--;
if (byte_index >= (edit->curs1 + edit->curs2) || byte_index < 0)
{ {
*char_width = 0; *char_width = 0;
return 0; return 0;
} }
ch = edit_get_utf (edit, byte_index, &width); for (i = 0; i < (3 * UTF8_CHAR_LEN); i++)
utf8_buf[i] = edit_get_byte (edit, byte_index + i - (2 * UTF8_CHAR_LEN));
utf8_buf[3 * UTF8_CHAR_LEN] = '\0';
if (width == 1) cursor_buf_ptr = utf8_buf + (2 * UTF8_CHAR_LEN);
{ str = g_utf8_find_prev_char (utf8_buf, cursor_buf_ptr);
*char_width = width;
return ch;
}
str = edit_get_byte_ptr (edit, byte_index); if (str == NULL || g_utf8_next_char(str) != cursor_buf_ptr)
buf = edit_get_buf_ptr (edit, byte_index);
if (str == NULL || buf == NULL)
{ {
*char_width = 0; *char_width = 1;
return 0; return *(cursor_buf_ptr-1);
}
/* get prev utf8 char */
if (str != buf)
str = g_utf8_find_prev_char (buf, str);
if (str == NULL)
{
*char_width = 0;
return 0;
} }
else else
{
res = g_utf8_get_char_validated (str, -1); res = g_utf8_get_char_validated (str, -1);
if (res < 0) if (res < 0)
{
ch = *str;
width = 0;
}
else
{
ch = res;
/* Calculate UTF-8 char width */
next_ch = g_utf8_next_char (str);
if (next_ch)
{ {
width = next_ch - str; *char_width = 1;
return *(cursor_buf_ptr-1);
} }
else else
{ {
ch = 0; *char_width = cursor_buf_ptr - str;
width = 0; return res;
} }
} }
*char_width = width;
return ch;
} }
/* --------------------------------------------------------------------------------------------- */ /* --------------------------------------------------------------------------------------------- */