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.support.annotation.VisibleForTesting;
20 import android.view.Display;
21 
22 import com.android.systemui.statusbar.phone.DozeParameters;
23 
24 /**
25  * Prevents usage of doze screen states on devices that don't support them.
26  */
27 public class DozeScreenStatePreventingAdapter implements DozeMachine.Service {
28 
29     private final DozeMachine.Service mInner;
30 
31     @VisibleForTesting
DozeScreenStatePreventingAdapter(DozeMachine.Service inner)32     DozeScreenStatePreventingAdapter(DozeMachine.Service inner) {
33         mInner = inner;
34     }
35 
36     @Override
finish()37     public void finish() {
38         mInner.finish();
39     }
40 
41     @Override
setDozeScreenState(int state)42     public void setDozeScreenState(int state) {
43         if (state == Display.STATE_DOZE || state == Display.STATE_DOZE_SUSPEND) {
44             state = Display.STATE_ON;
45         }
46         mInner.setDozeScreenState(state);
47     }
48 
49     @Override
requestWakeUp()50     public void requestWakeUp() {
51         mInner.requestWakeUp();
52     }
53 
54     /**
55      * If the device supports the doze display state, return {@code inner}. Otherwise
56      * return a new instance of {@link DozeScreenStatePreventingAdapter} wrapping {@code inner}.
57      */
wrapIfNeeded(DozeMachine.Service inner, DozeParameters params)58     public static DozeMachine.Service wrapIfNeeded(DozeMachine.Service inner,
59             DozeParameters params) {
60         return isNeeded(params) ? new DozeScreenStatePreventingAdapter(inner) : inner;
61     }
62 
isNeeded(DozeParameters params)63     private static boolean isNeeded(DozeParameters params) {
64         return !params.getDisplayStateSupported();
65     }
66 }
67