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
17package com.android.systemui.doze;
18
19import android.support.annotation.VisibleForTesting;
20import android.view.Display;
21
22import com.android.systemui.statusbar.phone.DozeParameters;
23
24/**
25 * Prevents usage of doze screen states on devices that don't support them.
26 */
27public class DozeScreenStatePreventingAdapter implements DozeMachine.Service {
28
29    private final DozeMachine.Service mInner;
30
31    @VisibleForTesting
32    DozeScreenStatePreventingAdapter(DozeMachine.Service inner) {
33        mInner = inner;
34    }
35
36    @Override
37    public void finish() {
38        mInner.finish();
39    }
40
41    @Override
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
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     */
58    public static DozeMachine.Service wrapIfNeeded(DozeMachine.Service inner,
59            DozeParameters params) {
60        return isNeeded(params) ? new DozeScreenStatePreventingAdapter(inner) : inner;
61    }
62
63    private static boolean isNeeded(DozeParameters params) {
64        return !params.getDisplayStateSupported();
65    }
66}
67