Initial NodeGraphEditor implementation

Scripts/Editor/NodeEditor.cs

@@ -7,7 +7,9 @@ using XNode;
 
 namespace XNodeEditor {
     /// <summary> Base class to derive custom Node editors from. Use this to create your own custom inspectors and editors for your nodes. </summary>
-    public class NodeEditor {
+    [CustomNodeEditor(typeof(Node))]
+    public class NodeEditor : XNodeInternal.NodeEditorBase<NodeEditor, NodeEditor.CustomNodeEditorAttribute> {
+
         /// <summary> Fires every whenever a node was modified through the editor </summary>
         public static Action<Node> onUpdateNode;
         public Node target;
@@ -45,17 +47,21 @@ namespace XNodeEditor {
         public virtual int GetWidth() {
             return 200;
         }
-    }
 
         [AttributeUsage(AttributeTargets.Class)]
-    public class CustomNodeEditorAttribute : Attribute {
+        public class CustomNodeEditorAttribute : Attribute,
-        public Type inspectedType { get { return _inspectedType; } }
+        INodeEditorAttrib {
-        private Type _inspectedType;
+            private Type inspectedType;
             /// <summary> Tells a NodeEditor which Node type it is an editor for </summary>
             /// <param name="inspectedType">Type that this editor can edit</param>
             /// <param name="contextMenuName">Path to the node</param>
             public CustomNodeEditorAttribute(Type inspectedType) {
-            _inspectedType = inspectedType;
+                this.inspectedType = inspectedType;
+            }
+
+            public Type GetInspectedType() {
+                return inspectedType;
+            }
         }
     }
 }

Scripts/Editor/NodeEditorBase.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Reflection;
+using UnityEngine;
+using XNode;
+using XNodeEditor;
+
+namespace XNodeInternal {
+	/// <summary> Handles caching of custom editor classes and their target types. Accessible with GetEditor(Type type) </summary>
+	public class NodeEditorBase<T, A> where A : Attribute, NodeEditorBase<T, A>.INodeEditorAttrib where T : class {
+		/// <summary> Custom editors defined with [CustomNodeEditor] </summary>
+		private static Dictionary<Type, T> editors;
+
+		public static T GetEditor(Type type) {
+			if (type == null) return null;
+			if (editors == null) CacheCustomEditors();
+			if (editors.ContainsKey(type)) return editors[type];
+			//If type isn't found, try base type
+			return GetEditor(type.BaseType);
+		}
+
+		private static void CacheCustomEditors() {
+			editors = new Dictionary<Type, T>();
+
+			//Get all classes deriving from NodeEditor via reflection
+			Type[] nodeEditors = NodeEditorWindow.GetDerivedTypes(typeof(T));
+			for (int i = 0; i < nodeEditors.Length; i++) {
+				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;
+				editors.Add(attrib.GetInspectedType(), Activator.CreateInstance(nodeEditors[i]) as T);
+			}
+		}
+
+		public interface INodeEditorAttrib {
+			Type GetInspectedType();
+		}
+	}
+}

Scripts/Editor/NodeEditorBase.cs.meta

@@ -0,0 +1,13 @@
+fileFormatVersion: 2
+guid: e85122ded59aceb4eb4b1bd9d9202642
+timeCreated: 1511353946
+licenseType: Free
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Scripts/Editor/NodeEditorGUI.cs

@@ -193,7 +193,7 @@ namespace XNodeEditor {
                 Node node = graph.nodes[n];
                 Type nodeType = node.GetType();
 
-                NodeEditor nodeEditor = GetNodeEditor(nodeType);
+                NodeEditor nodeEditor = NodeEditor.GetEditor(nodeType);
                 nodeEditor.target = node;
                 nodeEditor.serializedObject = new SerializedObject(node);
                 NodeEditor.portPositions = new Dictionary<NodePort, Vector2>();

Scripts/Editor/NodeEditorReflection.cs

@@ -10,8 +10,6 @@ using XNode;
 namespace XNodeEditor {
     /// <summary> Contains reflection-related info </summary>
     public partial class NodeEditorWindow {
-        /// <summary> Custom node editors defined with [CustomNodeInspector] </summary>
-        [NonSerialized] private static Dictionary<Type, NodeEditor> customNodeEditor;
         /// <summary> Custom node tint colors defined with [NodeColor(r, g, b)] </summary>
         public static Dictionary<Type, Color> nodeTint { get { return _nodeTint != null ? _nodeTint : _nodeTint = GetNodeTint(); } }
             [NonSerialized] private static Dictionary<Type, Color> _nodeTint;
@@ -19,31 +17,11 @@ namespace XNodeEditor {
         public static Type[] nodeTypes { get { return _nodeTypes != null ? _nodeTypes : _nodeTypes = GetNodeTypes(); } }
             [NonSerialized] private static Type[] _nodeTypes = null;
 
-        public static NodeEditor GetNodeEditor(Type node) {
-            if (customNodeEditor == null) CacheCustomNodeEditors();
-            if (customNodeEditor.ContainsKey(node)) return customNodeEditor[node];
-            return customNodeEditor[typeof(Node)];
-        }
-
         public static Type[] GetNodeTypes() {
             //Get all classes deriving from Node via reflection
             return GetDerivedTypes(typeof(Node));
         }
 
-        public static void CacheCustomNodeEditors() {
-            customNodeEditor = new Dictionary<Type, NodeEditor>();
-            customNodeEditor.Add(typeof(Node), new NodeEditor());
-            //Get all classes deriving from NodeEditor via reflection
-            Type[] nodeEditors = GetDerivedTypes(typeof(NodeEditor));
-            for (int i = 0; i < nodeEditors.Length; i++) {
-                var attribs = nodeEditors[i].GetCustomAttributes(typeof(CustomNodeEditorAttribute), false);
-                if (attribs == null || attribs.Length == 0) continue;
-                if (nodeEditors[i].IsAbstract) continue;
-                CustomNodeEditorAttribute attrib = attribs[0] as CustomNodeEditorAttribute;
-                customNodeEditor.Add(attrib.inspectedType, Activator.CreateInstance(nodeEditors[i]) as NodeEditor);
-            }
-        }
-
         public static Dictionary<Type, Color> GetNodeTint() {
             Dictionary<Type, Color> tints = new Dictionary<Type, Color>();
             for (int i = 0; i < nodeTypes.Length; i++) {
@@ -121,7 +99,6 @@ namespace XNodeEditor {
                 FieldInfo sectionsField = type.GetField("m_Sections", BindingFlags.Instance | BindingFlags.NonPublic);
                 IList sections = sectionsField.GetValue(window) as IList;
 
-
                 //Iterate through sections and check contents
                 Type sectionType = sectionsField.FieldType.GetGenericArguments() [0];
                 FieldInfo sectionContentField = sectionType.GetField("content", BindingFlags.Instance | BindingFlags.Public);

Scripts/Editor/NodeGraphEditor.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEngine;
+using XNode;
+
+namespace XNodeEditor {
+    /// <summary> Base class to derive custom Node Graph editors from. Use this to override how graphs are drawn in the editor. </summary>
+    [CustomNodeGraphEditor(typeof(NodeGraph))]
+    public class NodeGraphEditor : XNodeInternal.NodeEditorBase<NodeGraphEditor, NodeGraphEditor.CustomNodeGraphEditorAttribute> {
+        /// <summary> Custom node editors defined with [CustomNodeGraphEditor] </summary>
+        [NonSerialized] private static Dictionary<Type, NodeGraphEditor> editors;
+
+        public NodeGraph target;
+        public SerializedObject serializedObject;
+
+        public virtual Texture2D GetGridTexture() {
+            return NodeEditorPreferences.gridTexture;
+        }
+
+        [AttributeUsage(AttributeTargets.Class)]
+        public class CustomNodeGraphEditorAttribute : Attribute,
+        INodeEditorAttrib {
+            private Type inspectedType;
+            /// <summary> Tells a NodeEditor which Node type it is an editor for </summary>
+            /// <param name="inspectedType">Type that this editor can edit</param>
+            /// <param name="contextMenuName">Path to the node</param>
+            public CustomNodeGraphEditorAttribute(Type inspectedType) {
+                this.inspectedType = inspectedType;
+            }
+
+            public Type GetInspectedType() {
+                return inspectedType;
+            }
+        }
+    }
+}

Scripts/Editor/NodeGraphEditor.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: ddcbb5432255d3247a0718b15a9c193c
+timeCreated: 1505462176
+licenseType: Free
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: