Refactor ReactViewGroup to reuse ReactViewBackgroundManager

Reviewed By: achen1

Differential Revision: D6704701

fbshipit-source-id: 14bb155f2eb0951307674e257e729a1c72b08d8b

ReactAndroid/src/main/java/com/facebook/react/views/common/ViewHelper.java

@@ -4,6 +4,7 @@ package com.facebook.react.views.common;
 
 import android.graphics.drawable.Drawable;
 import android.os.Build;
+import android.support.annotation.Nullable;
 import android.view.View;
 
 /** Helper class for Views */
@@ -18,7 +19,7 @@ public class ViewHelper {
    * @param drawable {@link Drawable} The Drawable to use as the background, or null to remove the
    *     background
    */
-  public static void setBackground(View view, Drawable drawable) {
+  public static void setBackground(View view, @Nullable Drawable drawable) {
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
       view.setBackground(drawable);
     } else {

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundManager.java

@@ -57,6 +57,10 @@ public class ReactViewBackgroundManager {
     getOrCreateReactViewBackground().setRadius(borderRadius);
   }
 
+  public boolean hasRoundedBorders() {
+    return getOrCreateReactViewBackground().hasRoundedBorders();
+  }
+
   public void setBorderRadius(float borderRadius, int position) {
     getOrCreateReactViewBackground().setRadius(borderRadius, position);
   }

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewGroup.java

@@ -35,6 +35,7 @@ import com.facebook.react.uimanager.ReactClippingViewGroupHelper;
 import com.facebook.react.uimanager.ReactPointerEventsView;
 import com.facebook.react.uimanager.ReactZIndexedViewGroup;
 import com.facebook.react.uimanager.ViewGroupDrawingOrderHelper;
+import com.facebook.react.views.common.ViewHelper;
 import com.facebook.yoga.YogaConstants;
 import javax.annotation.Nullable;
 
@@ -51,6 +52,7 @@ public class ReactViewGroup extends ViewGroup implements
   private static final LayoutParams sDefaultLayoutParam = new ViewGroup.LayoutParams(0, 0);
   /* should only be used in {@link #updateClippingToRect} */
   private static final Rect sHelperRect = new Rect();
+  private ReactViewBackgroundManager mReactBackgroundManager;
 
   /**
    * This listener will be set for child views when removeClippedSubview property is enabled. When
@@ -111,6 +113,7 @@ public class ReactViewGroup extends ViewGroup implements
   public ReactViewGroup(Context context) {
     super(context);
     mDrawingOrderHelper = new ViewGroupDrawingOrderHelper(this);
+    mReactBackgroundManager = new ReactViewBackgroundManager(this);
   }
 
   @Override
@@ -144,17 +147,19 @@ public class ReactViewGroup extends ViewGroup implements
 
   @Override
   public void setBackgroundColor(int color) {
-    if (color == Color.TRANSPARENT && mReactBackgroundDrawable == null) {
-      // don't do anything, no need to allocate ReactBackgroundDrawable for transparent background
-    } else {
-      getOrCreateReactViewBackground().setColor(color);
-    }
+    mReactBackgroundManager.setBackgroundColor(color);
   }
 
-  @Override
-  public void setBackground(Drawable drawable) {
-    throw new UnsupportedOperationException(
-        "This method is not supported for ReactViewGroup instances");
+  public void setBorderWidth(int position, float width) {
+    mReactBackgroundManager.setBorderWidth(position, width);
+  }
+
+  public void setBorderColor(int position, float color, float alpha) {
+    mReactBackgroundManager.setBorderColor(position, color, alpha);
+  }
+
+  public void setBorderStyle(@Nullable String style) {
+    mReactBackgroundManager.setBorderStyle(style);
   }
 
   public void setTranslucentBackgroundDrawable(@Nullable Drawable background) {
@@ -162,13 +167,13 @@ public class ReactViewGroup extends ViewGroup implements
     // background to be a layer drawable that contains a drawable that has been previously setup
     // as a background previously. This will not work correctly as the drawable callback logic is
     // messed up in AOSP
-    updateBackgroundDrawable(null);
+    ViewHelper.setBackground(this, null);
     if (mReactBackgroundDrawable != null && background != null) {
       LayerDrawable layerDrawable =
           new LayerDrawable(new Drawable[] {mReactBackgroundDrawable, background});
-      updateBackgroundDrawable(layerDrawable);
+      ViewHelper.setBackground(this, layerDrawable);
     } else if (background != null) {
-      updateBackgroundDrawable(background);
+      ViewHelper.setBackground(this, background);
     }
   }
 
@@ -220,22 +225,13 @@ public class ReactViewGroup extends ViewGroup implements
     mNeedsOffscreenAlphaCompositing = needsOffscreenAlphaCompositing;
   }
 
-  public void setBorderWidth(int position, float width) {
-    getOrCreateReactViewBackground().setBorderWidth(position, width);
-  }
-
-  public void setBorderColor(int position, float rgb, float alpha) {
-    getOrCreateReactViewBackground().setBorderColor(position, rgb, alpha);
-  }
-
   public void setBorderRadius(float borderRadius) {
-    ReactViewBackgroundDrawable backgroundDrawable = getOrCreateReactViewBackground();
-    backgroundDrawable.setRadius(borderRadius);
+    mReactBackgroundManager.setBorderRadius(borderRadius);
 
     if (Build.VERSION_CODES.HONEYCOMB < Build.VERSION.SDK_INT
       && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
       final int UPDATED_LAYER_TYPE =
-        backgroundDrawable.hasRoundedBorders()
+        mReactBackgroundManager.hasRoundedBorders()
           ? View.LAYER_TYPE_SOFTWARE
           : View.LAYER_TYPE_HARDWARE;
 
@@ -246,13 +242,12 @@ public class ReactViewGroup extends ViewGroup implements
   }
 
   public void setBorderRadius(float borderRadius, int position) {
-    ReactViewBackgroundDrawable backgroundDrawable = getOrCreateReactViewBackground();
-    backgroundDrawable.setRadius(borderRadius, position);
+    mReactBackgroundManager.setBorderRadius(borderRadius, position);
 
     if (Build.VERSION_CODES.HONEYCOMB < Build.VERSION.SDK_INT
         && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
       final int UPDATED_LAYER_TYPE =
-          backgroundDrawable.hasRoundedBorders()
+        mReactBackgroundManager.hasRoundedBorders()
               ? View.LAYER_TYPE_SOFTWARE
               : View.LAYER_TYPE_HARDWARE;
 
@@ -262,10 +257,6 @@ public class ReactViewGroup extends ViewGroup implements
     }
   }
 
-  public void setBorderStyle(@Nullable String style) {
-    getOrCreateReactViewBackground().setBorderStyle(style);
-  }
-
   @Override
   public void setRemoveClippedSubviews(boolean removeClippedSubviews) {
     if (removeClippedSubviews == mRemoveClippedSubviews) {
@@ -600,32 +591,6 @@ public class ReactViewGroup extends ViewGroup implements
     return DEFAULT_BACKGROUND_COLOR;
   }
 
-  private ReactViewBackgroundDrawable getOrCreateReactViewBackground() {
-    if (mReactBackgroundDrawable == null) {
-      mReactBackgroundDrawable = new ReactViewBackgroundDrawable(getContext());
-      Drawable backgroundDrawable = getBackground();
-      updateBackgroundDrawable(
-          null); // required so that drawable callback is cleared before we add the
-                                  // drawable back as a part of LayerDrawable
-      if (backgroundDrawable == null) {
-        updateBackgroundDrawable(mReactBackgroundDrawable);
-      } else {
-        LayerDrawable layerDrawable =
-            new LayerDrawable(new Drawable[] {mReactBackgroundDrawable, backgroundDrawable});
-        updateBackgroundDrawable(layerDrawable);
-      }
-
-      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
-        mLayoutDirection =
-            I18nUtil.getInstance().isRTL(getContext())
-                ? LAYOUT_DIRECTION_RTL
-                : LAYOUT_DIRECTION_LTR;
-        mReactBackgroundDrawable.setResolvedLayoutDirection(mLayoutDirection);
-      }
-    }
-    return mReactBackgroundDrawable;
-  }
-
   @Override
   public @Nullable Rect getHitSlopRect() {
     return mHitSlopRect;
@@ -640,21 +605,6 @@ public class ReactViewGroup extends ViewGroup implements
     invalidate();
   }
 
-  /**
-   * Set the background for the view or remove the background. It calls {@link
-   * #setBackground(Drawable)} or {@link #setBackgroundDrawable(Drawable)} based on the sdk version.
-   *
-   * @param drawable {@link Drawable} The Drawable to use as the background, or null to remove the
-   *     background
-   */
-  private void updateBackgroundDrawable(Drawable drawable) {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
-      super.setBackground(drawable);
-    } else {
-      super.setBackgroundDrawable(drawable);
-    }
-  }
-
   @Override
   protected void dispatchDraw(Canvas canvas) {
     if (mOverflow != null) {