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using UnityEditor;
using UnityEngine;
using System.IO;
namespace XNodeEditor {
/// <summary> Deals with modified assets </summary>
class NodeEditorAssetModProcessor : UnityEditor.AssetModificationProcessor {
/// <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;
}
/// <summary> Automatically re-add loose node assets to the Graph node list </summary>
[InitializeOnLoadMethod]
private static void OnReloadEditor () {
// Find all NodeGraph assets
string[] guids = AssetDatabase.FindAssets ("t:" + typeof (XNode.NodeGraph));
for (int i = 0; i < guids.Length; i++) {
string assetpath = AssetDatabase.GUIDToAssetPath (guids[i]);
XNode.NodeGraph graph = AssetDatabase.LoadAssetAtPath (assetpath, typeof (XNode.NodeGraph)) as XNode.NodeGraph;
graph.nodes.RemoveAll(x => x == null); //Remove null items
Object[] objs = AssetDatabase.LoadAllAssetRepresentationsAtPath (assetpath);
// Ensure that all sub node assets are present in the graph node list
for (int u = 0; u < objs.Length; u++) {
// Ignore null sub assets
if (objs[u] == null) continue;
if (!graph.nodes.Contains (objs[u] as XNode.Node)) graph.nodes.Add(objs[u] as XNode.Node);
}
}
}
}
}
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