create-expo-cljs-app
Version:
Create a react native application with Expo and Shadow-CLJS!
94 lines (77 loc) • 3.46 kB
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
*/
;
import Platform from '../../../exports/Platform';
import RCTDeviceEventEmitter from './RCTDeviceEventEmitter';
import invariant from 'fbjs/lib/invariant';
/**
* `NativeEventEmitter` is intended for use by Native Modules to emit events to
* JavaScript listeners. If a `NativeModule` is supplied to the constructor, it
* will be notified (via `addListener` and `removeListeners`) when the listener
* count changes to manage "native memory".
*
* Currently, all native events are fired via a global `RCTDeviceEventEmitter`.
* This means event names must be globally unique, and it means that call sites
* can theoretically listen to `RCTDeviceEventEmitter` (although discouraged).
*/
var NativeEventEmitter = /*#__PURE__*/function () {
function NativeEventEmitter(nativeModule) {
if (Platform.OS === 'ios') {
invariant(nativeModule != null, '`new NativeEventEmitter()` requires a non-null argument.');
this._nativeModule = nativeModule;
}
}
var _proto = NativeEventEmitter.prototype;
_proto.addListener = function addListener(eventType, listener, context) {
var _this$_nativeModule,
_this = this;
(_this$_nativeModule = this._nativeModule) == null ? void 0 : _this$_nativeModule.addListener(eventType);
var subscription = RCTDeviceEventEmitter.addListener(eventType, listener, context);
return {
remove: function remove() {
if (subscription != null) {
var _this$_nativeModule2;
(_this$_nativeModule2 = _this._nativeModule) == null ? void 0 : _this$_nativeModule2.removeListeners(1); // $FlowFixMe[incompatible-use]
subscription.remove();
subscription = null;
}
}
};
}
/**
* @deprecated Use `remove` on the EventSubscription from `addListener`.
*/
;
_proto.removeListener = function removeListener(eventType, listener) {
var _this$_nativeModule3;
(_this$_nativeModule3 = this._nativeModule) == null ? void 0 : _this$_nativeModule3.removeListeners(1); // NOTE: This will report a deprecation notice via `console.error`.
// $FlowFixMe[prop-missing] - `removeListener` exists but is deprecated.
RCTDeviceEventEmitter.removeListener(eventType, listener);
};
_proto.emit = function emit(eventType) {
for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
args[_key - 1] = arguments[_key];
}
// Generally, `RCTDeviceEventEmitter` is directly invoked. But this is
// included for completeness.
RCTDeviceEventEmitter.emit.apply(RCTDeviceEventEmitter, [eventType].concat(args));
};
_proto.removeAllListeners = function removeAllListeners(eventType) {
var _this$_nativeModule4;
invariant(eventType != null, '`NativeEventEmitter.removeAllListener()` requires a non-null argument.');
(_this$_nativeModule4 = this._nativeModule) == null ? void 0 : _this$_nativeModule4.removeListeners(this.listenerCount(eventType));
RCTDeviceEventEmitter.removeAllListeners(eventType);
};
_proto.listenerCount = function listenerCount(eventType) {
return RCTDeviceEventEmitter.listenerCount(eventType);
};
return NativeEventEmitter;
}();
export { NativeEventEmitter as default };