internal void SubtractFromString(Range range)
{
var firstPart = "";
var lastPart = "";
if (range.Start > 0 && range.Start <= _text.Length)
{
firstPart = _text.Substring(0, range.Start);
}
if (range.End >= 0 && range.End < _text.Length)
{
lastPart = _text.Substring(range.End, _text.Length);
}
_text = firstPart + lastPart;
}
private Range calculateRange(int start, int end)
{
var range = new Range();
for (int i = start; i <= end && i < Mask.Length; i++)
{
if (_maskToRaw[i] != -1)
{
if (range.Start == -1)
{
range.Start = _maskToRaw[i];
}
range.End = _maskToRaw[i];
}
}
if (end == Mask.Length)
{
range.End = _rawText.Length;
}
if (range.Start == range.End && start < end)
{
int newStart = PreviousValidPosition(range.Start - 1);
if (newStart < range.Start)
{
range.Start = newStart;
}
}
return range;
}