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66 lines
2.8 KiB
66 lines
2.8 KiB
2 years ago
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import { Observable } from '../Observable';
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import { Subscriber } from '../Subscriber';
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @extends {Ignored}
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* @hide true
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*/
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export declare class FromEventPatternObservable<T> extends Observable<T> {
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private addHandler;
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private removeHandler;
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private selector;
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/**
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* Creates an Observable from an API based on addHandler/removeHandler
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* functions.
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*
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* <span class="informal">Converts any addHandler/removeHandler API to an
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* Observable.</span>
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*
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* <img src="./img/fromEventPattern.png" width="100%">
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*
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* Creates an Observable by using the `addHandler` and `removeHandler`
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* functions to add and remove the handlers, with an optional selector
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* function to project the event arguments to a result. The `addHandler` is
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* called when the output Observable is subscribed, and `removeHandler` is
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* called when the Subscription is unsubscribed.
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*
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* @example <caption>Emits clicks happening on the DOM document</caption>
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* function addClickHandler(handler) {
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* document.addEventListener('click', handler);
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* }
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*
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* function removeClickHandler(handler) {
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* document.removeEventListener('click', handler);
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* }
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*
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* var clicks = Rx.Observable.fromEventPattern(
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* addClickHandler,
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* removeClickHandler
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* );
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* clicks.subscribe(x => console.log(x));
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*
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* @see {@link from}
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* @see {@link fromEvent}
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*
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* @param {function(handler: Function): any} addHandler A function that takes
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* a `handler` function as argument and attaches it somehow to the actual
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* source of events.
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* @param {function(handler: Function, signal?: any): void} [removeHandler] An optional function that
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* takes a `handler` function as argument and removes it in case it was
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* previously attached using `addHandler`. if addHandler returns signal to teardown when remove,
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* removeHandler function will forward it.
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* @param {function(...args: any): T} [selector] An optional function to
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* post-process results. It takes the arguments from the event handler and
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* should return a single value.
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* @return {Observable<T>}
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* @static true
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* @name fromEventPattern
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* @owner Observable
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*/
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static create<T>(addHandler: (handler: Function) => any, removeHandler?: (handler: Function, signal?: any) => void, selector?: (...args: Array<any>) => T): FromEventPatternObservable<T>;
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constructor(addHandler: (handler: Function) => any, removeHandler?: (handler: Function, signal?: any) => void, selector?: (...args: Array<any>) => T);
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/** @deprecated internal use only */ _subscribe(subscriber: Subscriber<T>): void;
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private _callSelector(subscriber, args);
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private _callAddHandler(handler, errorSubscriber);
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}
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