/// <summary>
/// Find the parent node for a new node to be added at the current selection.
/// The new node can either be a SectionNode or an EmtpyNode.
/// The rule is to add inside containers and after cursor/phrase block.
/// </summary>
public virtual ObiNode ParentForNewNode(ObiNode newNode)
{
return(newNode is SectionNode ?
(Node is SectionNode ? Node.ParentAs <ObiNode>() : Node.AncestorAs <SectionNode>()) :
(Node is SectionNode ? Node : Node.ParentAs <ObiNode>()));
}
/// <summary>
/// Get the nearest ancestor of the given type. This is useful to get the section ancestor of a phrase
/// regardless of its nesting level.
/// </summary>
public T AncestorAs <T>() where T : ObiNode
{
ObiNode parent = Parent as ObiNode;
return(parent == null || parent is T ? parent as T : parent.AncestorAs <T>());
}
