CSSNodeCopyStyle API for Java and C#

Summary: Add CopyStyle API for Java and C#

Reviewed By: emilsjolander

Differential Revision: D4189954

fbshipit-source-id: 10759fdb27bf67350d3151614f7815aa09bf7e04

java/com/facebook/csslayout/CSSNode.java

@@ -190,6 +190,12 @@ public class CSSNode implements CSSNodeAPI<CSSNode> {
     jni_CSSNodeMarkLayoutSeen(mNativePointer);
   }
 
+  private native void jni_CSSNodeCopyStyle(long dstNativePointer, long srcNativePointer);
+  @Override
+  public void copyStyle(CSSNode srcNode) {
+    jni_CSSNodeCopyStyle(mNativePointer, srcNode.mNativePointer);
+  }
+
   private native int jni_CSSNodeStyleGetDirection(long nativePointer);
   @Override
   public CSSDirection getStyleDirection() {

java/com/facebook/csslayout/CSSNodeAPI.java

@@ -37,6 +37,7 @@ public interface CSSNodeAPI<CSSNodeType extends CSSNodeAPI> {
   void dirty();
   void markLayoutSeen();
   boolean valuesEqual(float f1, float f2);
+  void copyStyle(CSSNodeType srcNode);
   CSSDirection getStyleDirection();
   void setDirection(CSSDirection direction);
   CSSFlexDirection getFlexDirection();

java/com/facebook/csslayout/CSSNodeDEPRECATED.java

@@ -222,6 +222,11 @@ public class CSSNodeDEPRECATED implements CSSNodeAPI<CSSNodeDEPRECATED> {
     return FloatUtil.floatsEqual(f1, f2);
   }
 
+  @Override
+  public void copyStyle(CSSNodeDEPRECATED srcNode) {
+    throw new UnsupportedOperationException("copyStyle is not implemented");
+  }
+
   /**
    * Get this node's direction, as defined in the style.
    */