GT2/Ejectable/node_modules/react-native/Libraries/Components/AppleTV/TVEventHandler.js

53 lines
1.5 KiB
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow
*/
'use strict';
const Platform = require('../../Utilities/Platform');
const NativeEventEmitter = require('../../EventEmitter/NativeEventEmitter');
import NativeTVNavigationEventEmitter from './NativeTVNavigationEventEmitter';
import type EmitterSubscription from '../../vendor/emitter/EmitterSubscription';
class TVEventHandler {
__nativeTVNavigationEventListener: ?EmitterSubscription = null;
__nativeTVNavigationEventEmitter: ?NativeEventEmitter = null;
enable(component: ?any, callback: Function): void {
if (Platform.OS === 'ios' && !NativeTVNavigationEventEmitter) {
return;
}
this.__nativeTVNavigationEventEmitter = new NativeEventEmitter(
NativeTVNavigationEventEmitter,
);
this.__nativeTVNavigationEventListener = this.__nativeTVNavigationEventEmitter.addListener(
'onHWKeyEvent',
data => {
if (callback) {
callback(component, data);
}
},
);
}
disable(): void {
if (this.__nativeTVNavigationEventListener) {
this.__nativeTVNavigationEventListener.remove();
delete this.__nativeTVNavigationEventListener;
}
if (this.__nativeTVNavigationEventEmitter) {
delete this.__nativeTVNavigationEventEmitter;
}
}
}
module.exports = TVEventHandler;