@tamagui/react-native-web-lite
Version:
React Native for Web
69 lines (68 loc) • 2.23 kB
JavaScript
import { invariant } from "@tamagui/react-native-web-internals";
class EventSubscriptionVendor {
constructor() {
this._subscriptionsForType = {};
}
/**
* Adds a subscription keyed by an event type.
*
* @param {string} eventType
* @param {EventSubscription} subscription
*/
addSubscription(eventType, subscription) {
invariant(subscription.subscriber === this, "The subscriber of the subscription is incorrectly set.");
if (!this._subscriptionsForType[eventType]) {
this._subscriptionsForType[eventType] = [];
}
var key = this._subscriptionsForType[eventType].length;
this._subscriptionsForType[eventType].push(subscription);
subscription.eventType = eventType;
subscription.key = key;
return subscription;
}
/**
* Removes a bulk set of the subscriptions.
*
* @param {?string} eventType - Optional name of the event type whose
* registered supscriptions to remove, if null remove all subscriptions.
*/
removeAllSubscriptions(eventType) {
if (eventType == null) {
this._subscriptionsForType = {};
} else {
delete this._subscriptionsForType[eventType];
}
}
/**
* Removes a specific subscription. Instead of calling this function, call
* `subscription.remove()` directly.
*
* @param {object} subscription
*/
removeSubscription(subscription) {
var eventType = subscription.eventType;
var key = subscription.key;
var subscriptionsForType = this._subscriptionsForType[eventType];
if (subscriptionsForType) {
delete subscriptionsForType[key];
}
}
/**
* Returns the array of subscriptions that are currently registered for the
* given event type.
*
* Note: This array can be potentially sparse as subscriptions are deleted
* from it when they are removed.
*
* TODO: This returns a nullable array. wat?
*
* @param {string} eventType
* @returns {?array}
*/
getSubscriptionsForType(eventType) {
return this._subscriptionsForType[eventType];
}
}
var EventSubscriptionVendor_default = EventSubscriptionVendor;
export { EventSubscriptionVendor, EventSubscriptionVendor_default as default };
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