1 /*
2  * Copyright (C) 2022 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 distributed under the
11  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
12  * KIND, either express or implied. See the License for the specific language governing
13  * permissions and limitations under the License.
14  */
15 package com.android.systemui.unfold.system
16 
17 import android.content.Context
18 import android.hardware.devicestate.DeviceStateManager
19 import com.android.systemui.unfold.updates.FoldProvider
20 import com.android.systemui.unfold.updates.FoldProvider.FoldCallback
21 import java.util.concurrent.Executor
22 import javax.inject.Inject
23 import javax.inject.Singleton
24 
25 @Singleton
26 class DeviceStateManagerFoldProvider @Inject constructor(
27     private val deviceStateManager: DeviceStateManager,
28     private val context: Context
29 ) : FoldProvider {
30 
31     private val callbacks: MutableMap<FoldCallback,
32             DeviceStateManager.DeviceStateCallback> = hashMapOf()
33 
34     override fun registerCallback(callback: FoldCallback, executor: Executor) {
35         val listener = FoldStateListener(context, callback)
36         deviceStateManager.registerCallback(executor, listener)
37         callbacks[callback] = listener
38     }
39 
40     override fun unregisterCallback(callback: FoldCallback) {
41         val listener = callbacks.remove(callback)
42         listener?.let {
43             deviceStateManager.unregisterCallback(it)
44         }
45     }
46 
47     private inner class FoldStateListener(
48         context: Context,
49         listener: FoldCallback
50     ) : DeviceStateManager.FoldStateListener(context, { listener.onFoldUpdated(it) })
51 }
52