content: /*
   * Copyright (C) 2017 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.uioverrides.dynamicui;
  
  import android.content.Context;
  
  import com.android.launcher3.Utilities;
  
  import androidx.annotation.Nullable;
  
  public abstract class WallpaperManagerCompat {
  
      private static final Object sInstanceLock = new Object();
      private static WallpaperManagerCompat sInstance;
  
      public static WallpaperManagerCompat getInstance(Context context) {
          synchronized (sInstanceLock) {
              if (sInstance == null) {
                  context = context.getApplicationContext();
  
                  if (Utilities.ATLEAST_OREO_MR1) {
                      try {
                          sInstance = new WallpaperManagerCompatVOMR1(context);
                      } catch (Throwable e) {
                          // The wallpaper APIs do not yet exist
                      }
                  }
                  if (sInstance == null) {
                      sInstance = new WallpaperManagerCompatVL(context);
                  }
              }
              return sInstance;
          }
      }
  
  
      public abstract @Nullable WallpaperColorsCompat getWallpaperColors(int which);
  
      public abstract void addOnColorsChangedListener(OnColorsChangedListenerCompat listener);
  
      /**
       * Interface definition for a callback to be invoked when colors change on a wallpaper.
       */
      public interface OnColorsChangedListenerCompat {
  
          void onColorsChanged(WallpaperColorsCompat colors, int which);
      }
  }
  