internal void Remove(GeneratorPosition position, int count)
{
CheckOffsetAndRealized(position, count);
int index = IndexFromGeneratorPosition(position);
for (int i = 0; i < count; i++)
{
var container = ContainerIndexMap [index + i];
var item = ContainerItemMap [container];
ContainerIndexMap.Remove(container, index + i);
ContainerItemMap.Remove(container);
RealizedElements.Remove(index + i);
Owner.ClearContainerForItem(container, item);
}
}
void MoveExistingItems(int index, int offset)
{
// This is a little horrible. I should really collapse the existing
// RangeCollection so that every > the current index is decremented by 1.
// This is easier for now though. I may think of a better way later on.
RangeCollection newRanges = new RangeCollection();
List <int> list = new List <int> ();
for (int i = 0; i < RealizedElements.Count; i++)
{
list.Add(RealizedElements [i]);
}
if (offset > 0)
{
list.Reverse();
}
foreach (int i in list)
{
int oldIndex = i;
if (oldIndex < index)
{
newRanges.Add(oldIndex);
}
else
{
newRanges.Add(oldIndex + offset);
var container = ContainerIndexMap [oldIndex];
ContainerIndexMap.Remove(container, oldIndex);
ContainerIndexMap.Add(container, oldIndex + offset);
}
}
RealizedElements = newRanges;
}