1 /*
2  * Copyright (C) 2017 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 
17 package com.android.systemui.doze;
18 
19 import android.view.Display;
20 
21 import androidx.annotation.VisibleForTesting;
22 
23 import com.android.systemui.statusbar.phone.DozeParameters;
24 
25 /**
26  * Prevents usage of doze screen states on devices that don't support them.
27  */
28 public class DozeSuspendScreenStatePreventingAdapter extends DozeMachine.Service.Delegate {
29 
30     @VisibleForTesting
DozeSuspendScreenStatePreventingAdapter(DozeMachine.Service inner)31     DozeSuspendScreenStatePreventingAdapter(DozeMachine.Service inner) {
32         super(inner);
33     }
34 
35     @Override
setDozeScreenState(int state)36     public void setDozeScreenState(int state) {
37         if (state == Display.STATE_DOZE_SUSPEND) {
38             state = Display.STATE_DOZE;
39         }
40         super.setDozeScreenState(state);
41     }
42 
43     /**
44      * If the device supports the doze display state, return {@code inner}. Otherwise
45      * return a new instance of {@link DozeSuspendScreenStatePreventingAdapter} wrapping {@code inner}.
46      */
wrapIfNeeded(DozeMachine.Service inner, DozeParameters params)47     public static DozeMachine.Service wrapIfNeeded(DozeMachine.Service inner,
48             DozeParameters params) {
49         return isNeeded(params) ? new DozeSuspendScreenStatePreventingAdapter(inner) : inner;
50     }
51 
isNeeded(DozeParameters params)52     private static boolean isNeeded(DozeParameters params) {
53         return !params.getDozeSuspendDisplayStateSupported();
54     }
55 }
56