Implement java bindings for custom baseline function

Differential Revision: D4392516

fbshipit-source-id: 39cf6066f8e5982268becd87e54c9ab51fbf7a90

ReactAndroid/src/main/java/com/facebook/yoga/YogaNode.java

@@ -52,6 +52,7 @@ public class YogaNode implements YogaNodeAPI<YogaNode> {
   private YogaNode mParent;
   private List<YogaNode> mChildren;
   private YogaMeasureFunction mMeasureFunction;
+  private YogaBaselineFunction mBaselineFunction;
   private long mNativePointer;
   private Object mData;
 
@@ -623,6 +624,18 @@ public class YogaNode implements YogaNodeAPI<YogaNode> {
           YogaMeasureMode.values()[heightMode]);
   }
 
+  private native void jni_YGNodeSetHasBaselineFunc(long nativePointer, boolean hasMeasureFunc);
+  @Override
+  public void setBaselineFunction(YogaBaselineFunction baselineFunction) {
+    mBaselineFunction = baselineFunction;
+    jni_YGNodeSetHasBaselineFunc(mNativePointer, baselineFunction != null);
+  }
+
+  @DoNotStrip
+  public final float baseline(float width, float height) {
+    return mBaselineFunction.baseline(this, width, height);
+  }
+
   @Override
   public boolean isMeasureDefined() {
     return mMeasureFunction != null;