Provide I18n Module in OSS 3/3

Summary: expose context for I18nManagerModule and I18nUtil

Reviewed By: dmmiller

Differential Revision: D3575706

fbshipit-source-id: d432d3762df13f9a1b33a32eff306f88e49fe852

Author: MengjueW

ReactAndroid/src/main/java/com/facebook/react/uimanager/BUCK

@@ -18,6 +18,7 @@ android_library(
     react_native_target('java/com/facebook/react/animation:animation'),
     react_native_target('java/com/facebook/react/bridge:bridge'),
     react_native_target('java/com/facebook/react/common:common'),
+    react_native_target('java/com/facebook/react/modules/i18nmanager:i18nmanager'),
     react_native_target('java/com/facebook/react/touch:touch'),
     react_native_target('java/com/facebook/react/uimanager/annotations:annotations'),
   ],

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

@@ -14,6 +14,7 @@
 import java.util.List;
 
 import com.facebook.csslayout.CSSLayoutContext;
+import com.facebook.csslayout.CSSDirection;
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.animation.Animation;
 import com.facebook.react.bridge.Arguments;
@@ -23,6 +24,7 @@
 import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.UiThreadUtil;
 import com.facebook.react.bridge.WritableArray;
+import com.facebook.react.modules.i18nmanager.I18nUtil;
 import com.facebook.react.uimanager.debug.NotThreadSafeViewHierarchyUpdateDebugListener;
 import com.facebook.react.uimanager.events.EventDispatcher;
 import com.facebook.systrace.Systrace;
@@ -40,20 +42,24 @@ public class UIImplementation {
   private final UIViewOperationQueue mOperationsQueue;
   private final NativeViewHierarchyOptimizer mNativeViewHierarchyOptimizer;
   private final int[] mMeasureBuffer = new int[4];
+  private final ReactApplicationContext mReactContext;
 
   public UIImplementation(ReactApplicationContext reactContext, List<ViewManager> viewManagers) {
     this(reactContext, new ViewManagerRegistry(viewManagers));
   }
 
   private UIImplementation(ReactApplicationContext reactContext, ViewManagerRegistry viewManagers) {
     this(
+        reactContext,
         viewManagers,
         new UIViewOperationQueue(reactContext, new NativeViewHierarchyManager(viewManagers)));
   }
 
   protected UIImplementation(
+      ReactApplicationContext reactContext,
       ViewManagerRegistry viewManagers,
       UIViewOperationQueue operationsQueue) {
+    mReactContext = reactContext;
     mViewManagers = viewManagers;
     mOperationsQueue = operationsQueue;
     mNativeViewHierarchyOptimizer = new NativeViewHierarchyOptimizer(
@@ -63,6 +69,10 @@ protected UIImplementation(
 
   protected ReactShadowNode createRootShadowNode() {
     ReactShadowNode rootCSSNode = new ReactShadowNode();
+    I18nUtil sharedI18nUtilInstance = I18nUtil.getInstance();
+    if (sharedI18nUtilInstance.isRTL(mReactContext)) {
+      rootCSSNode.setDirection(CSSDirection.RTL);
+    }
     rootCSSNode.setViewClassName("Root");
     return rootCSSNode;
   }