public ICollection <TItem> Hide(IEnumerable <TItem> elements)
{
var worker = new WalkerWorker <TItem, TEdge> (this.Sink);
foreach (var item in elements)
{
worker.Remove(item);
foreach (var edge in this.Sink.Twig(item))
{
worker.Remove(edge);
}
}
RevoveEdgesOfChanged(worker);
CommitRemove(worker);
//List<TItem> changes = new List<TItem>(WalkerWorker.Changes);
//WalkerWorker.Changes.Clear();
//WalkerWorker.RemoveOrphans(this.View);
//CommitRemove(WalkerWorker);
//changes.AddRange(WalkerWorker.Changes);
//WalkerWorker.Changes.Clear();
return(worker.Changes);
}
public virtual ICollection <TItem> CollapseToFocused(IEnumerable <TItem> elements)
{
var worker = new WalkerWorker <TItem, TEdge> (this.Sink);
NeverRemove(worker, elements);
foreach (TItem item in Sink)
{
worker.RemoveCollapsed(item, Sink);
worker.Remove(item);
}
CommitRemove(worker);
return(worker.Changes);
}
protected virtual void RevoveEdgesOfChanged(WalkerWorker <TItem, TEdge> worker)
{
var changeStack = new Stack <TItem> (worker.Changes);
while (changeStack.Count != 0)
{
TItem item = changeStack.Pop();
if (item is TEdge)
{
TEdge edge = (TEdge)item;
if (worker.Changes.Contains(edge.Root) || worker.Changes.Contains(edge.Leaf))
{
worker.Remove(edge);
}
}
}
}