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