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.badge;
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.graphics.BitmapShader;
  import android.graphics.Canvas;
  import android.graphics.Shader;
  import android.graphics.drawable.Drawable;
  import android.support.annotation.Nullable;
  
  import com.android.launcher3.notification.NotificationInfo;
  import com.android.launcher3.notification.NotificationKeyData;
  import com.android.launcher3.util.PackageUserKey;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Contains data to be used in an icon badge.
   */
  public class BadgeInfo {
  
      public static final int MAX_COUNT = 999;
  
      /** Used to link this BadgeInfo to icons on the workspace and all apps */
      private PackageUserKey mPackageUserKey;
  
      /**
       * The keys of the notifications that this badge represents. These keys can later be
       * used to retrieve {@link NotificationInfo}'s.
       */
      private List<NotificationKeyData> mNotificationKeys;
  
      /**
       * The current sum of the counts in {@link #mNotificationKeys},
       * updated whenever a key is added or removed.
       */
      private int mTotalCount;
  
      /** This will only be initialized if the badge should display the notification icon. */
      private NotificationInfo mNotificationInfo;
  
      /**
       * When retrieving the notification icon, we draw it into this shader, which can be clipped
       * as necessary when drawn in a badge.
       */
      private Shader mNotificationIcon;
  
      public BadgeInfo(PackageUserKey packageUserKey) {
          mPackageUserKey = packageUserKey;
          mNotificationKeys = new ArrayList<>();
      }
  
      /**
       * Returns whether the notification was added or its count changed.
       */
      public boolean addOrUpdateNotificationKey(NotificationKeyData notificationKey) {
          int indexOfPrevKey = mNotificationKeys.indexOf(notificationKey);
          NotificationKeyData prevKey = indexOfPrevKey == -1 ? null
                  : mNotificationKeys.get(indexOfPrevKey);
          if (prevKey != null) {
              if (prevKey.count == notificationKey.count) {
                  return false;
              }
              // Notification was updated with a new count.
              mTotalCount -= prevKey.count;
              mTotalCount += notificationKey.count;
              prevKey.count = notificationKey.count;
              return true;
          }
          boolean added = mNotificationKeys.add(notificationKey);
          if (added) {
              mTotalCount += notificationKey.count;
          }
          return added;
      }
  
      /**
       * Returns whether the notification was removed (false if it didn't exist).
       */
      public boolean removeNotificationKey(NotificationKeyData notificationKey) {
          boolean removed = mNotificationKeys.remove(notificationKey);
          if (removed) {
              mTotalCount -= notificationKey.count;
          }
          return removed;
      }
  
      public List<NotificationKeyData> getNotificationKeys() {
          return mNotificationKeys;
      }
  
      public int getNotificationCount() {
          return Math.min(mTotalCount, MAX_COUNT);
      }
  
      public void setNotificationToShow(@Nullable NotificationInfo notificationInfo) {
          mNotificationInfo = notificationInfo;
          mNotificationIcon = null;
      }
  
      public boolean hasNotificationToShow() {
          return mNotificationInfo != null;
      }
  
      /**
       * Returns a shader to set on a Paint that will draw the notification icon in a badge.
       *
       * The shader is cached until {@link #setNotificationToShow(NotificationInfo)} is called.
       */
      public @Nullable Shader getNotificationIconForBadge(Context context, int badgeColor,
              int badgeSize, int badgePadding) {
          if (mNotificationInfo == null) {
              return null;
          }
          if (mNotificationIcon == null) {
              Drawable icon = mNotificationInfo.getIconForBackground(context, badgeColor)
                      .getConstantState().newDrawable();
              int iconSize = badgeSize - badgePadding * 2;
              icon.setBounds(0, 0, iconSize, iconSize);
              Bitmap iconBitmap = Bitmap.createBitmap(badgeSize, badgeSize, Bitmap.Config.ARGB_8888);
              Canvas canvas = new Canvas(iconBitmap);
              canvas.translate(badgePadding, badgePadding);
              icon.draw(canvas);
              mNotificationIcon = new BitmapShader(iconBitmap, Shader.TileMode.CLAMP,
                      Shader.TileMode.CLAMP);
          }
          return mNotificationIcon;
      }
  
      public boolean isIconLarge() {
          return mNotificationInfo != null && mNotificationInfo.isIconLarge();
      }
  
      /**
       * Whether newBadge represents the same PackageUserKey as this badge, and icons with
       * this badge should be invalidated. So, for instance, if a badge has 3 notifications
       * and one of those notifications is updated, this method should return false because
       * the badge still says "3" and the contents of those notifications are only retrieved
       * upon long-click. This method always returns true when adding or removing notifications,
       * or if the badge has a notification icon to show.
       */
      public boolean shouldBeInvalidated(BadgeInfo newBadge) {
          return mPackageUserKey.equals(newBadge.mPackageUserKey)
                  && (getNotificationCount() != newBadge.getNotificationCount()
                      || hasNotificationToShow());
      }
  }
  