@tamagui/react-native-web-lite
Version:
React Native for Web
135 lines • 5.82 kB
JavaScript
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf,
__hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all) __defProp(target, name, {
get: all[name],
enumerable: !0
});
},
__copyProps = (to, from, except, desc) => {
if (from && typeof from == "object" || typeof from == "function") for (let key of __getOwnPropNames(from)) !__hasOwnProp.call(to, key) && key !== except && __defProp(to, key, {
get: () => from[key],
enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable
});
return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
// If the importer is in node compatibility mode or this is not an ESM
// file that has been converted to a CommonJS file using a Babel-
// compatible transform (i.e. "__esModule" has not been set), then set
// "default" to the CommonJS "module.exports" for node compatibility.
isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", {
value: mod,
enumerable: !0
}) : target, mod)),
__toCommonJS = mod => __copyProps(__defProp({}, "__esModule", {
value: !0
}), mod);
var EventEmitter_exports = {};
__export(EventEmitter_exports, {
default: () => EventEmitter_default
});
module.exports = __toCommonJS(EventEmitter_exports);
var import_react_native_web_internals = require("@tamagui/react-native-web-internals"),
import_EmitterSubscription = __toESM(require("./_EmitterSubscription.cjs")),
import_EventSubscriptionVendor = __toESM(require("./_EventSubscriptionVendor.cjs")),
sparseFilterPredicate = () => !0;
class EventEmitter {
/**
* @constructor
*
* @param {EventSubscriptionVendor} subscriber - Optional subscriber instance
* to use. If omitted, a new subscriber will be created for the emitter.
*/
constructor(subscriber = new import_EventSubscriptionVendor.default()) {
this._subscriber = subscriber;
}
/**
* Adds a listener to be invoked when events of the specified type are
* emitted. An optional calling context may be provided. The data arguments
* emitted will be passed to the listener function.
*
* TODO: Annotate the listener arg's type. This is tricky because listeners
* can be invoked with varargs.
*
* @param {string} eventType - Name of the event to listen to
* @param {function} listener - Function to invoke when the specified event is
* emitted
* @param {*} context - Optional context object to use when invoking the
* listener
*/
addListener(eventType, listener, context) {
return this._subscriber.addSubscription(eventType, new import_EmitterSubscription.default(this, this._subscriber, listener, context));
}
/**
* Removes all of the registered listeners, including those registered as
* listener maps.
*
* @param {?string} eventType - Optional name of the event whose registered
* listeners to remove
*/
removeAllListeners(eventType) {
this._subscriber.removeAllSubscriptions(eventType);
}
/**
* @deprecated Use `remove` on the EventSubscription from `addListener`.
*/
removeSubscription(subscription) {
(0, import_react_native_web_internals.invariant)(subscription.emitter === this, "Subscription does not belong to this emitter."), this._subscriber.removeSubscription(subscription);
}
/**
* Returns the number of listeners that are currently registered for the given
* event.
*
* @param {string} eventType - Name of the event to query
* @returns {number}
*/
listenerCount(eventType) {
var subscriptions = this._subscriber.getSubscriptionsForType(eventType);
return subscriptions ?
// "callbackfn is called only for elements of the array which actually
// exist; it is not called for missing elements of the array."
// https://www.ecma-international.org/ecma-262/9.0/index.html#sec-array.prototype.filter
subscriptions.filter(sparseFilterPredicate).length : 0;
}
/**
* Emits an event of the given type with the given data. All handlers of that
* particular type will be notified.
*
* @param {string} eventType - Name of the event to emit
* @param {...*} Arbitrary arguments to be passed to each registered listener
*
* @example
* emitter.addListener('someEvent', function(message) {
* console.log(message);
* });
*
* emitter.emit('someEvent', 'abc'); // logs 'abc'
*/
emit(eventType) {
var subscriptions = this._subscriber.getSubscriptionsForType(eventType);
if (subscriptions) {
for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) args[_key - 1] = arguments[_key];
for (var i = 0, l = subscriptions.length; i < l; i++) {
var subscription = subscriptions[i];
subscription && subscription.listener && subscription.listener.apply(subscription.context, args);
}
}
}
/**
* @deprecated Use `remove` on the EventSubscription from `addListener`.
*/
removeListener(eventType, listener) {
console.error("EventEmitter.removeListener('" + eventType + "', ...): Method has been deprecated. Please instead use `remove()` on the subscription returned by `EventEmitter.addListener`.");
var subscriptions = this._subscriber.getSubscriptionsForType(eventType);
if (subscriptions) for (var i = 0, l = subscriptions.length; i < l; i++) {
var subscription = subscriptions[i];
subscription && subscription.listener === listener && subscription.remove();
}
}
}
var EventEmitter_default = EventEmitter;