public static bool GetByteSpaceCount(ITextZone zone, int start, ref int count)
{
for (int i = start; i >= 0; i--)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int enterid = trim.ToString().LastIndexOf('\n');
if (enterid >= 0)
{
string text = trim.ToString().Substring(enterid + 1);
foreach (char ch in text)
{
count += TextChar.GetByteSpaceCount(ch);
}
return(true);
}
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
if (GetByteSpaceCount(_zone, 0, ref count))
{
return(true);
}
continue;
}
foreach (char ch in zone.Items[i].ToString())
{
count += TextChar.GetByteSpaceCount(ch);
}
}
return(false);
}
public static bool GetPrevLength(ITextZone zone, int start, ref int count)
{
for (int i = start; i >= 0; i--)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int enterid = trim.ToString().LastIndexOf('\n');
if (enterid >= 0)
{
count += trim.ToString().Length - enterid - 1; return(true);
}
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
if (GetPrevLength(_zone, _zone.Items.Count - 1, ref count))
{
return(true);
}
continue;
}
count += zone.Items[i].ToString().Length;
}
return(false);
}
public static bool GetNextLength(ITextZone zone, int start, ref int count)
{
for (int i = start; i < zone.Items.Count; i++)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int enterid = trim.ToString().IndexOf('\n');
if (enterid >= 0)
{
count += enterid; return(true);
}
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
if (GetNextLength(_zone, 0, ref count))
{
return(true);
}
continue;
}
count += zone.Items[i].ToString().Length;
}
return(false);
}
public static ITextPosition MovePrevLine(ITextZone zone, int start, ref int lineoffset, ref int line, ref int column)
{
for (int i = start; i >= 0; i--)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int previndex = RefPrevLine(trim.ToString(), ref lineoffset, ref line, ref column);
if (previndex >= 0)
{
return new TextPosition()
{
Item = trim, ItemIndex = previndex, Line = line, Column = column
}
}
;
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
if (_zone.LineCount <= lineoffset)
{
lineoffset -= _zone.LineCount - 1;
line -= _zone.LineCount - 1; column = -100000;
}
else
{
return(MovePrevLine(_zone, _zone.Items.Count - 1, ref lineoffset, ref line, ref column));
}
}
}
return(null);
}
public static ITextPosition MoveNextLine(ITextZone zone, int start, ref int lineoffset, ref int line, ref int column)
{
for (int i = start; i < zone.Items.Count; i++)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int nextindex = RefNextLine(trim.ToString(), ref lineoffset, ref line, ref column);
if (nextindex >= 0)
{
return new TextPosition()
{
Item = trim, ItemIndex = nextindex + 1, Line = line, Column = column
}
}
;
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
if (_zone.LineCount <= lineoffset)
{
lineoffset -= _zone.LineCount - 1;
line += _zone.LineCount - 1; column = -100000;
}
else
{
return(MoveNextLine(_zone, 0, ref lineoffset, ref line, ref column));
}
}
}
return(null);
}
public static ITextPosition GetPrevLine(ITextZone zone, int start, int line)
{
for (int i = start; i >= 0; i--)
{
if (zone.Items[i] is ITextTrim)
{
ITextTrim trim = (ITextTrim)(zone.Items[i]);
int enterid = trim.ToString().LastIndexOf('\n');
if (enterid >= 0)
{
return new TextPosition()
{
Item = trim, ItemIndex = enterid, Line = line, Column = -1
}
}
;
}
if (zone.Items[i] is ITextZone)
{
ITextZone _zone = (ITextZone)(zone.Items[i]);
ITextPosition result = GetPrevLine(_zone, _zone.Items.Count - 1, line);
if (result != null)
{
return(result);
}
}
}
return(null);
}
