/// <summary> Return false for nodes that can't be removed </summary>
public virtual bool CanRemove(xNode.Node node)
{
// Check graph attributes to see if this node is required
Type graphType = target.GetType();
xNode.NodeGraph.RequireNodeAttribute[] attribs = Array.ConvertAll(
graphType.GetCustomAttributes(typeof(xNode.NodeGraph.RequireNodeAttribute), true), x => x as xNode.NodeGraph.RequireNodeAttribute);
if (attribs.Any(x => x.Requires(node.GetType())))
{
if (target.nodes.Count(x => x.GetType() == node.GetType()) <= 1)
{
return(false);
}
}
return(true);
}
/// <summary> Automatically delete Node sub-assets before deleting their script.
/// This is important to do, because you can't delete null sub assets.
/// <para/> For another workaround, see: https://gitlab.com/RotaryHeart-UnityShare/subassetmissingscriptdelete </summary>
private static AssetDeleteResult OnWillDeleteAsset(string path, RemoveAssetOptions options)
{
// Skip processing anything without the .cs extension
if (Path.GetExtension(path) != ".cs")
{
return(AssetDeleteResult.DidNotDelete);
}
// Get the object that is requested for deletion
UnityEngine.Object obj = AssetDatabase.LoadAssetAtPath <UnityEngine.Object> (path);
// If we aren't deleting a script, return
if (!(obj is UnityEditor.MonoScript))
{
return(AssetDeleteResult.DidNotDelete);
}
// Check script type. Return if deleting a non-node script
UnityEditor.MonoScript script = obj as UnityEditor.MonoScript;
System.Type scriptType = script.GetClass();
if (scriptType == null || (scriptType != typeof(xNode.Node) && !scriptType.IsSubclassOf(typeof(xNode.Node))))
{
return(AssetDeleteResult.DidNotDelete);
}
// Find all ScriptableObjects using this script
string[] guids = AssetDatabase.FindAssets("t:" + scriptType);
for (int i = 0; i < guids.Length; i++)
{
string assetpath = AssetDatabase.GUIDToAssetPath(guids[i]);
Object[] objs = AssetDatabase.LoadAllAssetRepresentationsAtPath(assetpath);
for (int k = 0; k < objs.Length; k++)
{
xNode.Node node = objs[k] as xNode.Node;
if (node.GetType() == scriptType)
{
if (node != null && node.graph != null)
{
// Delete the node and notify the user
Debug.LogWarning(node.name + " of " + node.graph + " depended on deleted script and has been removed automatically.", node.graph);
node.graph.RemoveNode(node);
}
}
}
}
// We didn't actually delete the script. Tell the internal system to carry on with normal deletion procedure
return(AssetDeleteResult.DidNotDelete);
}
private void InsertDuplicateNodes(xNode.Node[] nodes, Vector2 topLeft)
{
if (nodes == null || nodes.Length == 0)
{
return;
}
// Get top-left node
Vector2 topLeftNode = nodes.Select(x => x.position)
.Aggregate((x, y) => new Vector2(Mathf.Min(x.x, y.x), Mathf.Min(x.y, y.y)));
Vector2 offset = topLeft - topLeftNode;
UnityEngine.Object[] newNodes = new UnityEngine.Object[nodes.Length];
Dictionary <xNode.Node, xNode.Node> substitutes = new Dictionary <xNode.Node, xNode.Node>();
for (int i = 0; i < nodes.Length; i++)
{
xNode.Node srcNode = nodes[i];
if (srcNode == null)
{
continue;
}
// Check if user is allowed to add more of given node type
xNode.Node.DisallowMultipleNodesAttribute disallowAttrib;
Type nodeType = srcNode.GetType();
if (NodeEditorUtilities.GetAttrib(nodeType, out disallowAttrib))
{
int typeCount = this.graph.nodes.Count(x => x.GetType() == nodeType);
if (typeCount >= disallowAttrib.max)
{
continue;
}
}
xNode.Node newNode = this.graphEditor.CopyNode(srcNode);
substitutes.Add(srcNode, newNode);
newNode.position = srcNode.position + offset;
newNodes[i] = newNode;
}
// Walk through the selected nodes again, recreate connections, using the new nodes
for (int i = 0; i < nodes.Length; i++)
{
xNode.Node srcNode = nodes[i];
if (srcNode == null)
{
continue;
}
foreach (xNode.NodePort port in srcNode.Ports)
{
for (int c = 0; c < port.ConnectionCount; c++)
{
xNode.NodePort inputPort =
port.Direction == xNode.NodePort.IO.Input ? port : port.GetConnection(c);
xNode.NodePort outputPort =
port.Direction == xNode.NodePort.IO.Output ? port : port.GetConnection(c);
xNode.Node newNodeIn, newNodeOut;
if (substitutes.TryGetValue(inputPort.node, out newNodeIn) &&
substitutes.TryGetValue(outputPort.node, out newNodeOut))
{
newNodeIn.UpdatePorts();
newNodeOut.UpdatePorts();
inputPort = newNodeIn.GetInputPort(inputPort.fieldName);
outputPort = newNodeOut.GetOutputPort(outputPort.fieldName);
}
if (!inputPort.IsConnectedTo(outputPort))
{
inputPort.Connect(outputPort);
}
}
}
}
EditorUtility.SetDirty(this.graph);
// Select the new nodes
Selection.objects = newNodes;
}