/// <summary>
/// Creates a working copy of the specified nodeCanvas, and optionally also of it's associated editorStates.
/// This breaks the link of this object to any stored assets and references. That means, that all changes to this object will have to be explicitly saved.
/// </summary>
public static NodeCanvas CreateWorkingCopy(NodeCanvas nodeCanvas, bool editorStates)
{
nodeCanvas.Validate();
nodeCanvas = Clone(nodeCanvas);
// Take each SO, make a clone of it and store both versions in the respective list
// This will only iterate over the 'source instances'
List <ScriptableObject> allSOs = new List <ScriptableObject> ();
List <ScriptableObject> clonedSOs = new List <ScriptableObject> ();
for (int nodeCnt = 0; nodeCnt < nodeCanvas.nodes.Count; nodeCnt++)
{
Node node = nodeCanvas.nodes[nodeCnt];
node.FixNode();
node.CheckNodeKnobMigration();
// Clone Node and additional scriptableObjects
Node clonedNode = AddClonedSO(allSOs, clonedSOs, node);
AddClonedSOs(allSOs, clonedSOs, clonedNode.GetScriptableObjects());
foreach (NodeKnob knob in clonedNode.nodeKnobs)
{ // Clone NodeKnobs and additional scriptableObjects
if (knob == null)
{
continue;
}
AddClonedSO(allSOs, clonedSOs, knob);
AddClonedSOs(allSOs, clonedSOs, knob.GetScriptableObjects());
}
}
// Replace every reference to any of the initial SOs of the first list with the respective clones of the second list
for (int nodeCnt = 0; nodeCnt < nodeCanvas.nodes.Count; nodeCnt++)
{ // Clone Nodes, structural content and additional scriptableObjects
Node node = nodeCanvas.nodes[nodeCnt];
// Replace node and additional ScriptableObjects
Node clonedNode = nodeCanvas.nodes[nodeCnt] = ReplaceSO(allSOs, clonedSOs, node);
clonedNode.CopyScriptableObjects((ScriptableObject so) => ReplaceSO(allSOs, clonedSOs, so));
// We're going to restore these from NodeKnobs, no need to Replace muliple times
clonedNode.Inputs = new List <NodeInput> ();
clonedNode.Outputs = new List <NodeOutput> ();
for (int knobCnt = 0; knobCnt < clonedNode.nodeKnobs.Count; knobCnt++)
{ // Clone generic NodeKnobs
NodeKnob knob = clonedNode.nodeKnobs[knobCnt] = ReplaceSO(allSOs, clonedSOs, clonedNode.nodeKnobs[knobCnt]);
if (knob == null)
{
continue;
}
knob.body = clonedNode;
// Replace additional scriptableObjects in the NodeKnob
knob.CopyScriptableObjects((ScriptableObject so) => ReplaceSO(allSOs, clonedSOs, so));
// Add it into Inputs/Outputs again
if (knob is NodeInput)
{
clonedNode.Inputs.Add(knob as NodeInput);
}
else if (knob is NodeOutput)
{
clonedNode.Outputs.Add(knob as NodeOutput);
}
}
}
if (editorStates)
{
nodeCanvas.editorStates = CreateWorkingCopy(nodeCanvas.editorStates, nodeCanvas);
foreach (NodeEditorState state in nodeCanvas.editorStates)
{
state.selectedNode = ReplaceSO(allSOs, clonedSOs, state.selectedNode);
}
}
else
{
foreach (NodeEditorState state in nodeCanvas.editorStates)
{
state.selectedNode = null;
}
}
return(nodeCanvas);
}
