Resolve #661

Forward positional data to Node Component.

src/components/Nodes/wrapNode.tsx

@@ -214,6 +214,8 @@ export default (NodeComponent: ComponentType<NodeComponentProps>) => {
               id={id}
               data={data}
               type={type}
+              xPos={xPos}
+              yPos={yPos}
               selected={selected}
               isConnectable={isConnectable}
               sourcePosition={sourcePosition}

src/types/index.ts

@@ -167,6 +167,8 @@ export interface NodeProps {
   data: any;
   selected: boolean;
   isConnectable: boolean;
+  xPos?: number;
+  yPos?: number;
   targetPosition?: Position;
   sourcePosition?: Position;
   isDragging?: boolean;