public Range SplitRange(Range r, int index)
{
var range = new Range { StartIndex = index, Length = r.EndIndex - index };
r.Length = index - r.StartIndex;
var node = list.Find(r);
list.AddAfter(node, range);
return range;
}
public bool RemoveRange(Range r)
{
return list.Remove(r);
}
public Range AddRange(int index, int len)
{
var r = new Range { StartIndex = index, Length = len };
list.AddLast(r);
return r;
}