protected void UpdateFromSequence(IndexedListOnSequence <T> indexedListOnSequence, INonreactiveSequence <T> sequence, int currStartIndex)
{
IIndexedList <T> indexedList = indexedListOnSequence.IndexedList;
if (sequence is ParentSequence <T> parentSequence)
{
SequenceImmutableArray <ISequence <T> > childSequences = parentSequence.Children;
// Remove the old items, if there are any
if (_currDescendentItemCount > 0)
{
indexedList.Update(currStartIndex, _currDescendentItemCount, null);
_currDescendentItemCount = 0;
}
int childSequencesLength = childSequences.Count;
_childNodes = new Node[childSequencesLength];
for (int i = 0; i < childSequencesLength; i++)
{
Node childNode = CreateNode(indexedListOnSequence, childSequences[i], currStartIndex);
int childNodeDescendentItemCount = childNode.CurrDescendentItemCount;
_childNodes[i] = childNode;
_currDescendentItemCount += childNodeDescendentItemCount;
currStartIndex += childNodeDescendentItemCount;
}
}
else if (sequence is IItemsSequence <T> itemsSequence)
{
indexedList.Update(currStartIndex, _currDescendentItemCount, itemsSequence.Items.GetArray());
_childNodes = null;
_currDescendentItemCount = itemsSequence.ItemCount;
}
else
{
throw new InvalidOperationException($"Unknown Sequence type: {sequence.GetType().FullName}");
}
}
public NonreactiveNode(IndexedListOnSequence <T> indexedListOnSequence, INonreactiveSequence <T> sequence, int currStartIndex)
{
UpdateFromSequence(indexedListOnSequence, sequence, currStartIndex);
}