Update Android's ScrollView.scrollTo API to match JS/iOS

Summary:
public
We recently updated the `ScrollResponder.scrollResponderScrollTo` method to accept an `animated` argument, and deprecated the `scrollResponderScrollWithoutAnimationTo` method. This change was reflected in the native iOS implementation, but not on Android.

This diff updates the Android ScrollViewManager implementation to match the JS API, and removes the platform-specific fork in the JS code.

Reviewed By: dmmiller

Differential Revision: D2883515

fb-gh-sync-id: e5a0e1cf470e21af837b2311cf1048162ac3aff5

Libraries/Components/ScrollResponder.js

@@ -353,19 +353,11 @@ var ScrollResponderMixin = {
    * can also be used to quickly scroll to any element we want to focus
    */
   scrollResponderScrollTo: function(offsetX: number, offsetY: number, animated: boolean = true) {
-    if (Platform.OS === 'android') {
-      UIManager.dispatchViewManagerCommand(
-        React.findNodeHandle(this),
-        UIManager.RCTScrollView.Commands[animated ? 'scrollTo' : 'scrollWithoutAnimationTo'],
-        [Math.round(offsetX), Math.round(offsetY)],
-      );
-    } else {
-      ScrollViewManager.scrollTo(
-        React.findNodeHandle(this),
-        { x: offsetX, y: offsetY },
-        animated
-      );
-    }
+    UIManager.dispatchViewManagerCommand(
+      React.findNodeHandle(this),
+      UIManager.RCTScrollView.Commands.scrollTo,
+      [offsetX, offsetY, animated],
+    );
   },
 
   /**

ReactAndroid/src/main/java/com/facebook/react/views/recyclerview/RecyclerViewBackedScrollViewManager.java

@@ -75,16 +75,9 @@ public class RecyclerViewBackedScrollViewManager extends
 
   @Override
   public void scrollTo(
-      RecyclerViewBackedScrollView view,
+      RecyclerViewBackedScrollView scrollView,
       ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    view.scrollTo(data.mDestX, data.mDestY, true);
-  }
-
-  @Override
-  public void scrollWithoutAnimationTo(
-      RecyclerViewBackedScrollView view,
-      ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    view.scrollTo(data.mDestX, data.mDestY, false);
+    scrollView.scrollTo(data.mDestX, data.mDestY, data.mAnimated);
   }
 
   @Override

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java

@@ -75,13 +75,10 @@ public class ReactHorizontalScrollViewManager
   public void scrollTo(
       ReactHorizontalScrollView scrollView,
       ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    scrollView.smoothScrollTo(data.mDestX, data.mDestY);
-  }
-
-  @Override
-  public void scrollWithoutAnimationTo(
-      ReactHorizontalScrollView scrollView,
-      ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    scrollView.scrollTo(data.mDestX, data.mDestY);
+    if (data.mAnimated) {
+      scrollView.smoothScrollTo(data.mDestX, data.mDestY);
+    } else {
+      scrollView.scrollTo(data.mDestX, data.mDestY);
+    }
   }
 }

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactScrollViewCommandHelper.java

@@ -25,29 +25,27 @@ import com.facebook.react.common.MapBuilder;
 public class ReactScrollViewCommandHelper {
 
   public static final int COMMAND_SCROLL_TO = 1;
-  public static final int COMMAND_SCROLL_WITHOUT_ANIMATION_TO = 2;
 
   public interface ScrollCommandHandler<T> {
     void scrollTo(T scrollView, ScrollToCommandData data);
-    void scrollWithoutAnimationTo(T scrollView, ScrollToCommandData data);
   }
 
   public static class ScrollToCommandData {
 
     public final int mDestX, mDestY;
+    public final boolean mAnimated;
 
-    ScrollToCommandData(int destX, int destY) {
+    ScrollToCommandData(int destX, int destY, boolean animated) {
       mDestX = destX;
       mDestY = destY;
+      mAnimated = animated;
     }
   }
 
   public static Map<String,Integer> getCommandsMap() {
     return MapBuilder.of(
         "scrollTo",
-        COMMAND_SCROLL_TO,
-        "scrollWithoutAnimationTo",
-        COMMAND_SCROLL_WITHOUT_ANIMATION_TO);
+        COMMAND_SCROLL_TO);
   }
 
   public static <T> void receiveCommand(
@@ -62,13 +60,8 @@ public class ReactScrollViewCommandHelper {
       case COMMAND_SCROLL_TO: {
         int destX = Math.round(PixelUtil.toPixelFromDIP(args.getDouble(0)));
         int destY = Math.round(PixelUtil.toPixelFromDIP(args.getDouble(1)));
-        viewManager.scrollTo(scrollView, new ScrollToCommandData(destX, destY));
-        return;
-      }
-      case COMMAND_SCROLL_WITHOUT_ANIMATION_TO: {
-        int destX = Math.round(PixelUtil.toPixelFromDIP(args.getDouble(0)));
-        int destY = Math.round(PixelUtil.toPixelFromDIP(args.getDouble(1)));
-        viewManager.scrollWithoutAnimationTo(scrollView, new ScrollToCommandData(destX, destY));
+        boolean animated = args.getBoolean(2);
+        viewManager.scrollTo(scrollView, new ScrollToCommandData(destX, destY, animated));
         return;
       }
       default:

ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactScrollViewManager.java

@@ -82,14 +82,11 @@ public class ReactScrollViewManager
   public void scrollTo(
       ReactScrollView scrollView,
       ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    scrollView.smoothScrollTo(data.mDestX, data.mDestY);
-  }
-
-  @Override
-  public void scrollWithoutAnimationTo(
-      ReactScrollView scrollView,
-      ReactScrollViewCommandHelper.ScrollToCommandData data) {
-    scrollView.scrollTo(data.mDestX, data.mDestY);
+    if (data.mAnimated) {
+      scrollView.smoothScrollTo(data.mDestX, data.mDestY);
+    } else {
+      scrollView.scrollTo(data.mDestX, data.mDestY);
+    }
   }
 
   @Override