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.
    */

java/jni/CSSJNI.cpp

@@ -187,6 +187,10 @@ void jni_CSSNodeMarkLayoutSeen(alias_ref<jobject>, jlong nativePointer) {
   CSSNodeSetHasNewLayout(_jlong2CSSNodeRef(nativePointer), false);
 }
 
+void jni_CSSNodeCopyStyle(alias_ref<jobject>, jlong dstNativePointer, jlong srcNativePointer) {
+  CSSNodeCopyStyle(_jlong2CSSNodeRef(dstNativePointer), _jlong2CSSNodeRef(srcNativePointer));
+}
+
 #define CSS_NODE_JNI_STYLE_PROP(javatype, type, name)                                       \
   javatype jni_CSSNodeStyleGet##name(alias_ref<jobject>, jlong nativePointer) {             \
     return (javatype) CSSNodeStyleGet##name(_jlong2CSSNodeRef(nativePointer));              \
@@ -257,6 +261,7 @@ jint JNI_OnLoad(JavaVM *vm, void *) {
                         CSSMakeNativeMethod(jni_CSSNodeIsDirty),
                         CSSMakeNativeMethod(jni_CSSNodeMarkLayoutSeen),
                         CSSMakeNativeMethod(jni_CSSNodeSetHasMeasureFunc),
+                        CSSMakeNativeMethod(jni_CSSNodeCopyStyle),
 
                         CSSMakeNativeMethod(jni_CSSNodeStyleGetDirection),
                         CSSMakeNativeMethod(jni_CSSNodeStyleSetDirection),

java/tests/com/facebook/csslayout/CSSNodeTest.java

@@ -12,6 +12,7 @@ package com.facebook.csslayout;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 public class CSSNodeTest {
 
@@ -71,4 +72,16 @@ public class CSSNodeTest {
     assertEquals(CSSLogLevel.VERBOSE, mLogLevel);
     assertEquals("Flexbox", mLogMessage);
   }
+
+  @Test
+  public void testCopyStyle() {
+    final CSSNode node0 = new CSSNode();
+    assertTrue(CSSConstants.isUndefined(node0.getStyleMaxHeight()));
+
+    final CSSNode node1 = new CSSNode();
+    node1.setStyleMaxHeight(100);
+
+    node0.copyStyle(node1);
+    assertEquals(100, (int) node0.getStyleMaxHeight());
+  }
 }