1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.quickstep.util; 17 18 import androidx.annotation.NonNull; 19 20 import com.android.systemui.unfold.updates.screen.ScreenStatusProvider; 21 22 import java.util.ArrayList; 23 import java.util.List; 24 25 /** 26 * Screen status provider implementation that exposes methods to provide screen 27 * status updates to listeners. It is used to receive screen turned on event from 28 * SystemUI to Launcher. 29 */ 30 public class ProxyScreenStatusProvider implements ScreenStatusProvider { 31 32 public static final ProxyScreenStatusProvider INSTANCE = new ProxyScreenStatusProvider(); 33 private final List<ScreenListener> mListeners = new ArrayList<>(); 34 35 /** 36 * Called when the screen is on and ready (windows are drawn and screen blocker is removed) 37 */ onScreenTurnedOn()38 public void onScreenTurnedOn() { 39 mListeners.forEach(ScreenListener::onScreenTurnedOn); 40 } 41 42 /** Called when the screen is starting to turn on. */ onScreenTurningOn()43 public void onScreenTurningOn() { 44 mListeners.forEach(ScreenListener::onScreenTurningOn); 45 } 46 47 /** Called when the screen is starting to turn off. */ onScreenTurningOff()48 public void onScreenTurningOff() { 49 mListeners.forEach(ScreenListener::onScreenTurningOff); 50 } 51 52 @Override addCallback(@onNull ScreenListener listener)53 public void addCallback(@NonNull ScreenListener listener) { 54 mListeners.add(listener); 55 } 56 57 @Override removeCallback(@onNull ScreenListener listener)58 public void removeCallback(@NonNull ScreenListener listener) { 59 mListeners.remove(listener); 60 } 61 } 62