/* * Copyright (C) 2022 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.systemui.dreams; import android.annotation.NonNull; import android.service.notification.NotificationListenerService; import android.service.notification.StatusBarNotification; import com.android.systemui.dagger.qualifiers.Background; import com.android.systemui.statusbar.NotificationListener; import com.android.systemui.statusbar.NotificationListener.NotificationHandler; import com.android.systemui.statusbar.policy.CallbackController; import java.util.ArrayList; import java.util.Arrays; import java.util.HashSet; import java.util.List; import java.util.Set; import java.util.concurrent.Executor; /*** * {@link DreamOverlayNotificationCountProvider} provides the current notification count to * registered callbacks. Ongoing notifications are not included in the count. */ public class DreamOverlayNotificationCountProvider implements CallbackController { private final Set mNotificationKeys = new HashSet<>(); private final List mCallbacks = new ArrayList<>(); private final NotificationHandler mNotificationHandler = new NotificationHandler() { @Override public void onNotificationPosted( StatusBarNotification sbn, NotificationListenerService.RankingMap rankingMap) { if (sbn.isOngoing()) { // Don't count ongoing notifications. return; } mNotificationKeys.add(sbn.getKey()); reportNotificationCountChanged(); } @Override public void onNotificationRemoved( StatusBarNotification sbn, NotificationListenerService.RankingMap rankingMap) { mNotificationKeys.remove(sbn.getKey()); reportNotificationCountChanged(); } @Override public void onNotificationRemoved( StatusBarNotification sbn, NotificationListenerService.RankingMap rankingMap, int reason) { mNotificationKeys.remove(sbn.getKey()); reportNotificationCountChanged(); } @Override public void onNotificationRankingUpdate(NotificationListenerService.RankingMap rankingMap) { } @Override public void onNotificationsInitialized() { } }; public DreamOverlayNotificationCountProvider( NotificationListener notificationListener, @Background Executor bgExecutor) { notificationListener.addNotificationHandler(mNotificationHandler); bgExecutor.execute(() -> { Arrays.stream(notificationListener.getActiveNotifications()) .forEach(sbn -> mNotificationKeys.add(sbn.getKey())); reportNotificationCountChanged(); } ); } @Override public void addCallback(@NonNull Callback callback) { if (!mCallbacks.contains(callback)) { mCallbacks.add(callback); callback.onNotificationCountChanged(mNotificationKeys.size()); } } @Override public void removeCallback(@NonNull Callback callback) { mCallbacks.remove(callback); } private void reportNotificationCountChanged() { final int notificationCount = mNotificationKeys.size(); mCallbacks.forEach(callback -> callback.onNotificationCountChanged(notificationCount)); } /** * A callback to be registered with {@link DreamOverlayNotificationCountProvider} to receive * changes to the current notification count. */ public interface Callback { /** * Called when the notification count has changed. * @param count The current notification count. */ void onNotificationCountChanged(int count); } }