public void DoUndo(IGraphProcessingEnvironment procEnv)
{
String name;
if (procEnv.Graph is LGSPNamedGraph && ((LGSPNamedGraph)procEnv.Graph).ElemToName.TryGetValue(_newElem, out name))
{
LGSPNamedGraph lgspGraph = (LGSPNamedGraph)procEnv.Graph;
if (_newElem is INode)
{
LGSPNode newNode = (LGSPNode)_newElem;
LGSPNode oldNode = (LGSPNode)_oldElem;
lgspGraph.ElemToName[oldNode] = name;
lgspGraph.RetypingNode(newNode, oldNode); // this will switch the variables
lgspGraph.ReplaceNode(newNode, oldNode);
lgspGraph.ElemToName.Remove(newNode);
lgspGraph.NameToElem[name] = oldNode;
}
else
{
LGSPEdge newEdge = (LGSPEdge)_newElem;
LGSPEdge oldEdge = (LGSPEdge)_oldElem;
lgspGraph.ElemToName[oldEdge] = name;
lgspGraph.RetypingEdge(newEdge, oldEdge); // this will switch the variables
lgspGraph.ReplaceEdge(newEdge, oldEdge);
lgspGraph.ElemToName.Remove(newEdge);
lgspGraph.NameToElem[name] = oldEdge;
}
}
else
{
LGSPGraph lgspGraph = (LGSPGraph)procEnv.Graph;
if (_newElem is INode)
{
LGSPNode newNode = (LGSPNode)_newElem;
LGSPNode oldNode = (LGSPNode)_oldElem;
lgspGraph.RetypingNode(newNode, oldNode); // this will switch the variables
lgspGraph.ReplaceNode(newNode, oldNode);
}
else
{
LGSPEdge newEdge = (LGSPEdge)_newElem;
LGSPEdge oldEdge = (LGSPEdge)_oldElem;
lgspGraph.RetypingEdge(newEdge, oldEdge); // this will switch the variables
lgspGraph.ReplaceEdge(newEdge, oldEdge);
}
}
}
