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.systemui.keyguard
17 
18 import com.android.systemui.unfold.updates.screen.ScreenStatusProvider
19 import com.android.systemui.unfold.updates.screen.ScreenStatusProvider.ScreenListener
20 import javax.inject.Inject
21 import javax.inject.Singleton
22 
23 @Singleton
24 class LifecycleScreenStatusProvider @Inject constructor(screenLifecycle: ScreenLifecycle) :
25     ScreenStatusProvider, ScreenLifecycle.Observer {
26 
27     init {
28         screenLifecycle.addObserver(this)
29     }
30 
31     private val listeners: MutableList<ScreenListener> = mutableListOf()
32 
33     override fun removeCallback(listener: ScreenListener) {
34         listeners.remove(listener)
35     }
36 
37     override fun addCallback(listener: ScreenListener) {
38         listeners.add(listener)
39     }
40 
41     override fun onScreenTurnedOn() {
42         listeners.forEach(ScreenListener::onScreenTurnedOn)
43     }
44 }
45