public void RemoveChild(TopicNode child)
{
var children = ChildNodes.ToList();
children.Remove(child);
child._parent = null;
child._previous = null;
child._next = null;
if (!children.Any())
{
_firstChild = null;
return;
}
_firstChild = children.First();
_firstChild._parent = this;
_firstChild._previous = null;
children.Last()._next = null;
for (int i = 1; i < children.Count; i++)
{
children[i]._previous = children[i - 1];
}
for (int i = 0; i < children.Count - 1; i++)
{
children[i]._next = children[i + 1];
}
}
public void PrependChild(TopicNode node)
{
if (_firstChild != null)
{
_firstChild._previous = node;
node._next = _firstChild;
}
FirstChild = node;
}
public void InsertAfter(TopicNode node)
{
if (_next != null)
{
_next._previous = node;
node._next = _next;
}
node._previous = this;
_next = node;
}
public void AppendChild(TopicNode node)
{
var last = LastChild;
if (last == null)
{
FirstChild = node;
}
else
{
last.InsertAfter(node);
}
}
public void InsertBefore(TopicNode node)
{
if (_previous == null)
{
if (_parent != null)
{
_parent.PrependChild(node);
}
else
{
node._next = this;
_previous = node;
}
}
else
{
_previous._next = node;
node._previous = _previous;
node._next = this;
_previous = node;
}
}
public TopicExpression(TopicNode parent, TopicGraph graph)
{
_parent = parent;
_graph = graph;
}
protected bool Equals(TopicNode other)
{
return(Equals(_topicType, other._topicType));
}
