85 lines
2.2 KiB
JavaScript
85 lines
2.2 KiB
JavaScript
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/**
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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 EventEmitter = require('../vendor/emitter/EventEmitter');
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const EventSubscriptionVendor = require('../vendor/emitter/EventSubscriptionVendor');
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import type EmitterSubscription from '../vendor/emitter/EmitterSubscription';
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function checkNativeEventModule(eventType: ?string) {
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if (eventType) {
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if (eventType.lastIndexOf('statusBar', 0) === 0) {
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throw new Error(
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'`' +
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eventType +
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'` event should be registered via the StatusBarIOS module',
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);
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}
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if (eventType.lastIndexOf('keyboard', 0) === 0) {
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throw new Error(
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'`' +
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eventType +
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'` event should be registered via the Keyboard module',
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);
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}
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if (eventType === 'appStateDidChange' || eventType === 'memoryWarning') {
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throw new Error(
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'`' +
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eventType +
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'` event should be registered via the AppState module',
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);
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}
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}
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}
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/**
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* Deprecated - subclass NativeEventEmitter to create granular event modules instead of
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* adding all event listeners directly to RCTDeviceEventEmitter.
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*/
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class RCTDeviceEventEmitter extends EventEmitter {
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sharedSubscriber: EventSubscriptionVendor;
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constructor() {
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const sharedSubscriber = new EventSubscriptionVendor();
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super(sharedSubscriber);
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this.sharedSubscriber = sharedSubscriber;
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}
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addListener(
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eventType: string,
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listener: Function,
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context: ?Object,
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): EmitterSubscription {
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if (__DEV__) {
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checkNativeEventModule(eventType);
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}
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return super.addListener(eventType, listener, context);
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}
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removeAllListeners(eventType: ?string) {
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if (__DEV__) {
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checkNativeEventModule(eventType);
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}
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super.removeAllListeners(eventType);
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}
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removeSubscription(subscription: EmitterSubscription) {
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if (subscription.emitter !== this) {
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subscription.emitter.removeSubscription(subscription);
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} else {
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super.removeSubscription(subscription);
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}
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}
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}
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module.exports = (new RCTDeviceEventEmitter(): RCTDeviceEventEmitter);
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