/*
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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.doze;
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import android.os.Handler;
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import android.util.Log;
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import android.view.Display;
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import com.android.systemui.statusbar.phone.DozeParameters;
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import com.android.systemui.util.wakelock.SettableWakeLock;
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import com.android.systemui.util.wakelock.WakeLock;
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/**
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* Controls the screen when dozing.
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*/
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public class DozeScreenState implements DozeMachine.Part {
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private static final boolean DEBUG = DozeService.DEBUG;
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private static final String TAG = "DozeScreenState";
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/**
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* Delay entering low power mode when animating to make sure that we'll have
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* time to move all elements into their final positions while still at 60 fps.
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*/
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private static final int ENTER_DOZE_DELAY = 6000;
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/**
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* Hide wallpaper earlier when entering low power mode. The gap between
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* hiding the wallpaper and changing the display mode is necessary to hide
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* the black frame that's inherent to hardware specs.
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*/
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public static final int ENTER_DOZE_HIDE_WALLPAPER_DELAY = 4500;
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private final DozeMachine.Service mDozeService;
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private final Handler mHandler;
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private final Runnable mApplyPendingScreenState = this::applyPendingScreenState;
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private final DozeParameters mParameters;
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private int mPendingScreenState = Display.STATE_UNKNOWN;
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private SettableWakeLock mWakeLock;
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public DozeScreenState(DozeMachine.Service service, Handler handler,
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DozeParameters parameters, WakeLock wakeLock) {
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mDozeService = service;
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mHandler = handler;
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mParameters = parameters;
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mWakeLock = new SettableWakeLock(wakeLock, TAG);
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}
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@Override
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public void transitionTo(DozeMachine.State oldState, DozeMachine.State newState) {
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int screenState = newState.screenState(mParameters);
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if (newState == DozeMachine.State.FINISH) {
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// Make sure not to apply the screen state after DozeService was destroyed.
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mPendingScreenState = Display.STATE_UNKNOWN;
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mHandler.removeCallbacks(mApplyPendingScreenState);
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applyScreenState(screenState);
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mWakeLock.setAcquired(false);
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return;
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}
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if (screenState == Display.STATE_UNKNOWN) {
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// We'll keep it in the existing state
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return;
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}
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boolean messagePending = mHandler.hasCallbacks(mApplyPendingScreenState);
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boolean pulseEnding = oldState == DozeMachine.State.DOZE_PULSE_DONE
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&& newState == DozeMachine.State.DOZE_AOD;
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if (messagePending || oldState == DozeMachine.State.INITIALIZED || pulseEnding) {
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// During initialization, we hide the navigation bar. That is however only applied after
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// a traversal; setting the screen state here is immediate however, so it can happen
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// that the screen turns on again before the navigation bar is hidden. To work around
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// that, wait for a traversal to happen before applying the initial screen state.
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mPendingScreenState = screenState;
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// Delay screen state transitions even longer while animations are running.
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boolean shouldDelayTransition = newState == DozeMachine.State.DOZE_AOD
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&& mParameters.shouldControlScreenOff();
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if (shouldDelayTransition) {
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mWakeLock.setAcquired(true);
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}
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if (!messagePending) {
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if (DEBUG) {
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Log.d(TAG, "Display state changed to " + screenState + " delayed by "
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+ (shouldDelayTransition ? ENTER_DOZE_DELAY : 1));
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}
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if (shouldDelayTransition) {
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mHandler.postDelayed(mApplyPendingScreenState, ENTER_DOZE_DELAY);
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} else {
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mHandler.post(mApplyPendingScreenState);
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}
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} else if (DEBUG) {
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Log.d(TAG, "Pending display state change to " + screenState);
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}
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} else {
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applyScreenState(screenState);
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}
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}
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private void applyPendingScreenState() {
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applyScreenState(mPendingScreenState);
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mPendingScreenState = Display.STATE_UNKNOWN;
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}
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private void applyScreenState(int screenState) {
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if (screenState != Display.STATE_UNKNOWN) {
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if (DEBUG) Log.d(TAG, "setDozeScreenState(" + screenState + ")");
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mDozeService.setDozeScreenState(screenState);
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mPendingScreenState = Display.STATE_UNKNOWN;
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mWakeLock.setAcquired(false);
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}
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}
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}
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