content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.launcher3.keyboard;
  
  import android.graphics.Rect;
  import android.view.View;
  
  import com.android.launcher3.PagedView;
  
  /**
   * {@link FocusIndicatorHelper} for a generic view group.
   */
  public class ViewGroupFocusHelper extends FocusIndicatorHelper {
  
      private final View mContainer;
  
      public ViewGroupFocusHelper(View container) {
          super(container);
          mContainer = container;
      }
  
      @Override
      public void viewToRect(View v, Rect outRect) {
          outRect.left = 0;
          outRect.top = 0;
  
          computeLocationRelativeToContainer(v, outRect);
  
          // If a view is scaled, its position will also shift accordingly. For optimization, only
          // consider this for the last node.
          outRect.left += (1 - v.getScaleX()) * v.getWidth() / 2;
          outRect.top += (1 - v.getScaleY()) * v.getHeight() / 2;
  
          outRect.right = outRect.left + (int) (v.getScaleX() * v.getWidth());
          outRect.bottom = outRect.top + (int) (v.getScaleY() * v.getHeight());
      }
  
      private void computeLocationRelativeToContainer(View child, Rect outRect) {
          View parent = (View) child.getParent();
          outRect.left += child.getX();
          outRect.top += child.getY();
  
          if (parent != mContainer) {
              if (parent instanceof PagedView) {
                  PagedView page = (PagedView) parent;
                  outRect.left -= page.getScrollForPage(page.indexOfChild(child));
              }
  
              computeLocationRelativeToContainer(parent, outRect);
          }
      }
  }
  