/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.systemui.keyguard;
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import android.os.Trace;
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import com.android.systemui.Dumpable;
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import java.io.FileDescriptor;
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import java.io.PrintWriter;
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import javax.inject.Inject;
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import javax.inject.Singleton;
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/**
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* Tracks the screen lifecycle.
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*/
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@Singleton
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public class ScreenLifecycle extends Lifecycle<ScreenLifecycle.Observer> implements Dumpable {
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public static final int SCREEN_OFF = 0;
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public static final int SCREEN_TURNING_ON = 1;
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public static final int SCREEN_ON = 2;
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public static final int SCREEN_TURNING_OFF = 3;
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private int mScreenState = SCREEN_OFF;
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@Inject
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public ScreenLifecycle() {
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}
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public int getScreenState() {
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return mScreenState;
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}
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public void dispatchScreenTurningOn() {
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setScreenState(SCREEN_TURNING_ON);
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dispatch(Observer::onScreenTurningOn);
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}
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public void dispatchScreenTurnedOn() {
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setScreenState(SCREEN_ON);
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dispatch(Observer::onScreenTurnedOn);
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}
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public void dispatchScreenTurningOff() {
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setScreenState(SCREEN_TURNING_OFF);
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dispatch(Observer::onScreenTurningOff);
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}
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public void dispatchScreenTurnedOff() {
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setScreenState(SCREEN_OFF);
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dispatch(Observer::onScreenTurnedOff);
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}
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@Override
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public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
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pw.println("ScreenLifecycle:");
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pw.println(" mScreenState=" + mScreenState);
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}
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private void setScreenState(int screenState) {
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mScreenState = screenState;
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Trace.traceCounter(Trace.TRACE_TAG_APP, "screenState", screenState);
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}
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public interface Observer {
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default void onScreenTurningOn() {}
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default void onScreenTurnedOn() {}
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default void onScreenTurningOff() {}
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default void onScreenTurnedOff() {}
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}
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}
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