/*
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* Copyright (C) 2019 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.statusbar.policy;
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import android.content.Context;
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import android.hardware.SensorPrivacyManager;
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import java.util.ArrayList;
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import java.util.List;
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import javax.inject.Inject;
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import javax.inject.Singleton;
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/**
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* Controls sensor privacy state and notification.
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*/
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@Singleton
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public class SensorPrivacyControllerImpl implements SensorPrivacyController,
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SensorPrivacyManager.OnSensorPrivacyChangedListener {
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private SensorPrivacyManager mSensorPrivacyManager;
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private final List<OnSensorPrivacyChangedListener> mListeners;
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private Object mLock = new Object();
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private boolean mSensorPrivacyEnabled;
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/**
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* Public constructor.
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*/
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@Inject
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public SensorPrivacyControllerImpl(Context context) {
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mSensorPrivacyManager = (SensorPrivacyManager) context.getSystemService(
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Context.SENSOR_PRIVACY_SERVICE);
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mSensorPrivacyEnabled = mSensorPrivacyManager.isSensorPrivacyEnabled();
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mSensorPrivacyManager.addSensorPrivacyListener(this);
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mListeners = new ArrayList<>(1);
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}
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/**
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* Returns whether sensor privacy is enabled.
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*/
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public boolean isSensorPrivacyEnabled() {
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synchronized (mLock) {
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return mSensorPrivacyEnabled;
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}
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}
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/**
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* Adds the provided listener for callbacks when sensor privacy state changes.
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*/
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public void addCallback(OnSensorPrivacyChangedListener listener) {
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synchronized (mLock) {
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mListeners.add(listener);
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notifyListenerLocked(listener);
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}
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}
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/**
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* Removes the provided listener from callbacks when sensor privacy state changes.
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*/
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public void removeCallback(OnSensorPrivacyChangedListener listener) {
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synchronized (mLock) {
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mListeners.remove(listener);
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}
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}
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/**
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* Callback invoked by the SensorPrivacyService when sensor privacy state changes.
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*/
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public void onSensorPrivacyChanged(boolean enabled) {
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synchronized (mLock) {
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mSensorPrivacyEnabled = enabled;
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for (OnSensorPrivacyChangedListener listener : mListeners) {
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notifyListenerLocked(listener);
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}
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}
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}
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private void notifyListenerLocked(OnSensorPrivacyChangedListener listener) {
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listener.onSensorPrivacyChanged(mSensorPrivacyEnabled);
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}
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}
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