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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.qs;
import android.app.ActivityManager;
import android.database.ContentObserver;
import android.os.Handler;
import com.android.systemui.statusbar.policy.Listenable;
import com.android.systemui.util.settings.SecureSettings;
/** Helper for managing a secure setting. **/
public abstract class SecureSetting extends ContentObserver implements Listenable {
private final SecureSettings mSecureSettings;
private final String mSettingName;
private final int mDefaultValue;
private boolean mListening;
private int mUserId;
private int mObservedValue;
protected abstract void handleValueChanged(int value, boolean observedChange);
public SecureSetting(SecureSettings secureSettings, Handler handler, String settingName,
int userId) {
this(secureSettings, handler, settingName, userId, 0);
}
public SecureSetting(SecureSettings secureSetting, Handler handler, String settingName) {
this(secureSetting, handler, settingName, ActivityManager.getCurrentUser());
}
public SecureSetting(SecureSettings secureSettings, Handler handler, String settingName,
int userId, int defaultValue) {
super(handler);
mSecureSettings = secureSettings;
mSettingName = settingName;
mObservedValue = mDefaultValue = defaultValue;
mUserId = userId;
}
public int getValue() {
return mListening ? mObservedValue : getValueFromProvider();
}
public void setValue(int value) {
mSecureSettings.putIntForUser(mSettingName, value, mUserId);
}
private int getValueFromProvider() {
return mSecureSettings.getIntForUser(mSettingName, mDefaultValue, mUserId);
}
@Override
public void setListening(boolean listening) {
if (listening == mListening) return;
mListening = listening;
if (listening) {
mObservedValue = getValueFromProvider();
mSecureSettings.registerContentObserverForUser(
mSecureSettings.getUriFor(mSettingName), false, this, mUserId);
} else {
mSecureSettings.unregisterContentObserver(this);
mObservedValue = mDefaultValue;
}
}
@Override
public void onChange(boolean selfChange) {
final int value = getValueFromProvider();
final boolean changed = value != mObservedValue;
mObservedValue = value;
handleValueChanged(value, changed);
}
public void setUserId(int userId) {
mUserId = userId;
if (mListening) {
setListening(false);
setListening(true);
}
}
public int getCurrentUser() {
return mUserId;
}
public String getKey() {
return mSettingName;
}
public boolean isListening() {
return mListening;
}
}
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