Faster editor caching and less error prone

Scripts/Editor/NodeEditorBase.cs

@@ -9,7 +9,7 @@ namespace XNodeEditor.Internal {
 	/// <summary> Handles caching of custom editor classes and their target types. Accessible with GetEditor(Type type) </summary>
 	public class NodeEditorBase<T, A, K> where A : Attribute, NodeEditorBase<T, A, K>.INodeEditorAttrib where T : NodeEditorBase<T, A, K> where K : ScriptableObject {
 		/// <summary> Custom editors defined with [CustomNodeEditor] </summary>
-		private static Dictionary<Type, T> editorTemplates;
+		private static Dictionary<Type, Type> editorTypes;
 		private static Dictionary<K, T> editors = new Dictionary<K, T>();
 		public K target;
 		public SerializedObject serializedObject;
@@ -18,33 +18,36 @@ public static T GetEditor(K target) {
 			if (target == null) return null;
 			if (!editors.ContainsKey(target)) {
 				Type type = target.GetType();
-				T editor = GetEditor(type);
-				editors.Add(target, Activator.CreateInstance(editor.GetType()) as T);
+				Type editorType = GetEditorType(type);
+				editors.Add(target, Activator.CreateInstance(editorType) as T);
 				editors[target].target = target;
 				editors[target].serializedObject = new SerializedObject(target);
 			}
-			return editors[target];
+			T editor = editors[target];
+			if (editor.target == null) editor.target = target;
+			if (editor.serializedObject == null) editor.serializedObject = new SerializedObject(target);
+			return editor;
 		}
 
-		private static T GetEditor(Type type) {
+		private static Type GetEditorType(Type type) {
 			if (type == null) return null;
-			if (editorTemplates == null) CacheCustomEditors();
-			if (editorTemplates.ContainsKey(type)) return editorTemplates[type];
+			if (editorTypes == null) CacheCustomEditors();
+			if (editorTypes.ContainsKey(type)) return editorTypes[type];
 			//If type isn't found, try base type
-			return GetEditor(type.BaseType);
+			return GetEditorType(type.BaseType);
 		}
 
 		private static void CacheCustomEditors() {
-			editorTemplates = new Dictionary<Type, T>();
+			editorTypes = new Dictionary<Type, Type>();
 
 			//Get all classes deriving from NodeEditor via reflection
 			Type[] nodeEditors = XNodeEditor.NodeEditorWindow.GetDerivedTypes(typeof(T));
 			for (int i = 0; i < nodeEditors.Length; i++) {
+				if (nodeEditors[i].IsAbstract) continue;
 				var attribs = nodeEditors[i].GetCustomAttributes(typeof(A), false);
 				if (attribs == null || attribs.Length == 0) continue;
-				if (nodeEditors[i].IsAbstract) continue;
 				A attrib = attribs[0] as A;
-				editorTemplates.Add(attrib.GetInspectedType(), Activator.CreateInstance(nodeEditors[i]) as T);
+				editorTypes.Add(attrib.GetInspectedType(), nodeEditors[i]);
 			}
 		}