public int GetOriginalPosition(int position, PositionRounding rounding)
{
var subset = GetSubset(position);
if (subset == null)
{
switch (rounding)
{
case PositionRounding.None:
throw new UnableToDetectOriginalPositionException();
case PositionRounding.Up:
subset = GetClosestHigherSubset(position);
return(subset == null ? int.MaxValue : subset.Index - 1 - subset.OriginalTextShift);
case PositionRounding.Down:
subset = GetClosestLowerSubset(position);
return(subset == null ? 0 : subset.Index + subset.Length - subset.OriginalTextShift);
default:
throw new NotSupportedException("Unsupported original position rounding option.");
}
}
return(position - subset.OriginalTextShift);
}
public virtual int GetOriginalPosition(int position, PositionRounding rounding)
{
if (Parent != null)
{
var originalPosition = Parent.GetOriginalPosition(position + Origin.Start, rounding);
return(originalPosition);
}
return(position + Origin.Start);
}
public override int GetOriginalPosition(int position, PositionRounding rounding)
{
position = TextMap.GetOriginalPosition(position, rounding) + Origin.Start;
if (Parent != null)
{
var startOriginalPosition = Parent.GetOriginalPosition(position, rounding);
return(startOriginalPosition);
}
return(position);
}
