Extend ReactShadowNode in order to have a reference to the ReactShadowNode that was used to clone a node

Reviewed By: achen1

Differential Revision: D7289345

fbshipit-source-id: 34bfba8aca43299a3a8929a0e3eb85721f736dd0

ReactAndroid/src/main/java/com/facebook/react/uimanager/ReactShadowNode.java

@@ -365,4 +365,12 @@ public interface ReactShadowNode<T extends ReactShadowNode> {
    * {@link ReactShadowNode}.
    */
   List<ReactShadowNode> getChildrenList();
+
+  /**
+   * @return the {@link ReactShadowNode} that was used during the cloning mechanism to create
+   * this {@link ReactShadowNode} or null if this object was not created using a clone operation.
+   */
+  @Nullable ReactShadowNode getOriginalReactShadowNode();
+
+  void setOriginalReactShadowNode(@Nullable ReactShadowNode node);
 }

ReactAndroid/src/main/java/com/facebook/react/uimanager/ReactShadowNodeImpl.java

@@ -99,6 +99,7 @@ public class ReactShadowNodeImpl implements ReactShadowNode<ReactShadowNodeImpl>
   private final float[] mPadding = new float[Spacing.ALL + 1];
   private final boolean[] mPaddingIsPercent = new boolean[Spacing.ALL + 1];
   private YogaNode mYogaNode;
+  private ReactShadowNode mOriginalReactShadowNode = null;
 
   private @Nullable ReactStylesDiffMap mNewProps;
 
@@ -1072,4 +1073,14 @@ public class ReactShadowNodeImpl implements ReactShadowNode<ReactShadowNodeImpl>
   public List<ReactShadowNode> getChildrenList() {
     return mChildren == null ? null : Collections.<ReactShadowNode>unmodifiableList(mChildren);
   }
+
+  @Override
+  public ReactShadowNode getOriginalReactShadowNode() {
+    return mOriginalReactShadowNode;
+  }
+
+  @Override
+  public void setOriginalReactShadowNode(ReactShadowNode node) {
+    mOriginalReactShadowNode = node;
+  }
 }