44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
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/**
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* Copyright (c) Meta Platforms, Inc. and 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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* @flow strict
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* @format
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*/
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import type {IEventEmitter} from '../vendor/emitter/EventEmitter';
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import {beginEvent, endEvent} from '../Performance/Systrace';
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import EventEmitter from '../vendor/emitter/EventEmitter';
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// FIXME: use typed events
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type RCTDeviceEventDefinitions = $FlowFixMe;
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/**
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* Global EventEmitter used by the native platform to emit events to JavaScript.
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* Events are identified by globally unique event names.
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*
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* NativeModules that emit events should instead subclass `NativeEventEmitter`.
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*/
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class RCTDeviceEventEmitter extends EventEmitter<RCTDeviceEventDefinitions> {
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// Add systrace to RCTDeviceEventEmitter.emit method for debugging
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emit<TEvent: $Keys<RCTDeviceEventDefinitions>>(
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eventType: TEvent,
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...args: RCTDeviceEventDefinitions[TEvent]
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): void {
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beginEvent(() => `RCTDeviceEventEmitter.emit#${eventType}`);
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super.emit(eventType, ...args);
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endEvent();
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}
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}
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const instance = new RCTDeviceEventEmitter();
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Object.defineProperty(global, '__rctDeviceEventEmitter', {
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configurable: true,
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value: instance,
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});
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export default (instance: IEventEmitter<RCTDeviceEventDefinitions>);
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