content: /*
   * Copyright (C) 2014 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 androidx.test.ui.app;
  
  import android.content.Context;
  import android.content.res.TypedArray;
  import android.graphics.Canvas;
  import android.graphics.Rect;
  import android.graphics.drawable.Drawable;
  import android.view.View;
  import androidx.recyclerview.widget.LinearLayoutManager;
  import androidx.recyclerview.widget.RecyclerView;
  
  /** Simple Decorator which draws a line between each list item. Copied from AOSP. */
  @SuppressWarnings("DuplicateDivider")
  public class DividerItemDecoration extends RecyclerView.ItemDecoration {
  
      private static final int[] ATTRS = new int[]{
              android.R.attr.listDivider
      };
  
      public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;
  
      public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;
  
      private Drawable mDivider;
  
      private int mOrientation;
  
      public DividerItemDecoration(Context context, int orientation) {
          final TypedArray a = context.obtainStyledAttributes(ATTRS);
          mDivider = a.getDrawable(0);
          a.recycle();
          setOrientation(orientation);
      }
  
      public void setOrientation(int orientation) {
          if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
              throw new IllegalArgumentException("invalid orientation");
          }
          mOrientation = orientation;
      }
  
      @Override
      public void onDraw(Canvas c, RecyclerView parent) {
          if (mOrientation == VERTICAL_LIST) {
              drawVertical(c, parent);
          } else {
              drawHorizontal(c, parent);
          }
      }
  
      public void drawVertical(Canvas c, RecyclerView parent) {
          final int left = parent.getPaddingLeft();
          final int right = parent.getWidth() - parent.getPaddingRight();
  
          final int childCount = parent.getChildCount();
          for (int i = 0; i < childCount; i++) {
              final View child = parent.getChildAt(i);
              final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                      .getLayoutParams();
              final int top = child.getBottom() + params.bottomMargin;
              final int bottom = top + mDivider.getIntrinsicHeight();
              mDivider.setBounds(left, top, right, bottom);
              mDivider.draw(c);
          }
      }
  
      public void drawHorizontal(Canvas c, RecyclerView parent) {
          final int top = parent.getPaddingTop();
          final int bottom = parent.getHeight() - parent.getPaddingBottom();
  
          final int childCount = parent.getChildCount();
          for (int i = 0; i < childCount; i++) {
              final View child = parent.getChildAt(i);
              final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                      .getLayoutParams();
              final int left = child.getRight() + params.rightMargin;
              final int right = left + mDivider.getIntrinsicHeight();
              mDivider.setBounds(left, top, right, bottom);
              mDivider.draw(c);
          }
      }
  
      @Override
      public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
          if (mOrientation == VERTICAL_LIST) {
              outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
          } else {
              outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
          }
      }
  }
  