// Normally if all its successors are deleted, it is deletable.
// Regarding SymbolConstraint, it returns false.
// Regarding SymbolGraphicState, it is deletable if all its predecessors are deleted.
public virtual bool IsDeletable(FRList<Node> deletedNodeList)
{
if (deletedNodeList == null)
return false;
if (GetFragment() == null)
return true;
FRList<Node> immediateSuccessors = new FRList<Node>();
GetFragment().GetImmediateSuccessors(this, immediateSuccessors);
foreach (Node item in immediateSuccessors)
{
if (!deletedNodeList.Contains(item))
return false; // Some one isn't deleted, I can't be deleted.
}
return true;
}
public void GetImmediateSuccessors(Node node, FRList<Node> immediateSucs)
{
GraphVertex vertex = null;
if (!m_NodeGraphVertexMap.ContainsKey(node))
return;
vertex = m_NodeGraphVertexMap[node];
foreach (GraphEdge edge in vertex.GetSuccessorEdges())
{
Node sucNode = edge.GetEndVertex().GetNode();
Debug.Assert(sucNode != node);
if (!immediateSucs.Contains(sucNode))
immediateSucs.Add(sucNode);
}
}
public void GetImmediatePredecessors(Node node, FRList<Node> immediatePres)
{
GraphVertex vertex = null;
if (!m_NodeGraphVertexMap.ContainsKey(node))
return;
vertex = m_NodeGraphVertexMap[node];
foreach(GraphEdge edge in vertex.GetPredecessorEdges())
{
Node preNode = edge.GetStartVertex().GetNode();
Debug.Assert(preNode != node);
if (!immediatePres.Contains(preNode))
immediatePres.Add(preNode);
}
}
// bClearRelatedNodes indicates whether remove the related nodes
// or just remove the input one.
public void RemoveNode(Node node, bool bClearRelatedNodes)
{
if (!IsExist(node))
return;
if(!bClearRelatedNodes)
{
m_NodeList.Remove(node);
}
else
{
FRList<Node> deletedNodeList = new FRList<Node>();
FRList<Node> dieNominateList = new FRList<Node>();
deletedNodeList.Add(node);
dieNominateList.Add(node);
while (dieNominateList.Count > 0)
{
Node tmpNode = dieNominateList[0];
dieNominateList.Remove(tmpNode);
if (deletedNodeList.Contains(tmpNode) || tmpNode.IsDeletable(deletedNodeList))
{
if (!deletedNodeList.Contains(tmpNode))
deletedNodeList.Add(tmpNode);
FRList<Node> nodeNominates = new FRList<Node>();
tmpNode.GetDeleteNominates(nodeNominates);
foreach (Node item in nodeNominates)
{
if (!dieNominateList.Contains(item))
dieNominateList.Add(item);
}
}
}
// Delete the nodes in the data model
foreach (Node delNode in deletedNodeList)
m_NodeList.Remove(delNode);
}
m_bIsGraphDirty = true;
}