GT2/Ejectable/node_modules/react-native/Libraries/EventEmitter/RCTDeviceEventEmitter.js

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