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5.6 KiB
{"version":3,"file":"FromEventPatternObservable.js","sourceRoot":"","sources":["../../src/observable/FromEventPatternObservable.ts"],"names":[],"mappings":";;;;;;AAAA,2BAA2B,oBAAoB,CAAC,CAAA;AAChD,2BAA2B,eAAe,CAAC,CAAA;AAC3C,6BAA6B,iBAAiB,CAAC,CAAA;AAG/C;;;;GAIG;AACH;IAAmD,8CAAa;IAwD9D,oCAAoB,UAAsC,EACtC,aAAyD,EACzD,QAAqC;QACvD,iBAAO,CAAC;QAHU,eAAU,GAAV,UAAU,CAA4B;QACtC,kBAAa,GAAb,aAAa,CAA4C;QACzD,aAAQ,GAAR,QAAQ,CAA6B;IAEzD,CAAC;IA1DD;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;OA+CG;IACI,iCAAM,GAAb,UAAiB,UAAsC,EACtC,aAAyD,EACzD,QAAqC;QACpD,MAAM,CAAC,IAAI,0BAA0B,CAAC,UAAU,EAAE,aAAa,EAAE,QAAQ,CAAC,CAAC;IAC7E,CAAC;IAQD,oCAAoC,CAAC,+CAAU,GAAV,UAAW,UAAyB;QAApC,iBAiBpC;QAhBC,IAAM,aAAa,GAAG,IAAI,CAAC,aAAa,CAAC;QAEzC,IAAM,OAAO,GAAG,CAAC,CAAC,IAAI,CAAC,QAAQ,GAAG;YAAC,cAAmB;iBAAnB,WAAmB,CAAnB,sBAAmB,CAAnB,IAAmB;gBAAnB,6BAAmB;;YACpD,KAAI,CAAC,aAAa,CAAC,UAAU,EAAE,IAAI,CAAC,CAAC;QACvC,CAAC,GAAG,UAAS,CAAM,IAAI,UAAU,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;QAE7C,IAAM,QAAQ,GAAG,IAAI,CAAC,eAAe,CAAC,OAAO,EAAE,UAAU,CAAC,CAAC;QAE3D,EAAE,CAAC,CAAC,CAAC,uBAAU,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC;YAC/B,MAAM,CAAC;QACT,CAAC;QAED,UAAU,CAAC,GAAG,CAAC,IAAI,2BAAY,CAAC;YAC9B,4DAA4D;YAC5D,aAAa,CAAC,OAAO,EAAE,QAAQ,CAAC,CAAE;QACpC,CAAC,CAAC,CAAC,CAAC;IACN,CAAC;IAEO,kDAAa,GAArB,UAAsB,UAAyB,EAAE,IAAgB;QAC/D,IAAI,CAAC;YACH,IAAM,MAAM,GAAM,IAAI,CAAC,QAAQ,OAAb,IAAI,EAAa,IAAI,CAAC,CAAC;YACzC,UAAU,CAAC,IAAI,CAAC,MAAM,CAAC,CAAC;QAC1B,CACA;QAAA,KAAK,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACT,UAAU,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;QACtB,CAAC;IACH,CAAC;IAEO,oDAAe,GAAvB,UAAwB,OAAyB,EAAE,eAA8B;QAC/E,IAAI,CAAC;YACH,MAAM,CAAC,IAAI,CAAC,UAAU,CAAC,OAAO,CAAC,IAAI,IAAI,CAAC;QAC1C,CACA;QAAA,KAAK,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACT,eAAe,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;QAC3B,CAAC;IACH,CAAC;IACH,iCAAC;AAAD,CAAC,AAnGD,CAAmD,uBAAU,GAmG5D;AAnGY,kCAA0B,6BAmGtC,CAAA","sourcesContent":["import { isFunction } from '../util/isFunction';\nimport { Observable } from '../Observable';\nimport { Subscription } from '../Subscription';\nimport { Subscriber } from '../Subscriber';\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @extends {Ignored}\n * @hide true\n */\nexport class FromEventPatternObservable<T> extends Observable<T> {\n\n /**\n * Creates an Observable from an API based on addHandler/removeHandler\n * functions.\n *\n * <span class=\"informal\">Converts any addHandler/removeHandler API to an\n * Observable.</span>\n *\n * <img src=\"./img/fromEventPattern.png\" width=\"100%\">\n *\n * Creates an Observable by using the `addHandler` and `removeHandler`\n * functions to add and remove the handlers, with an optional selector\n * function to project the event arguments to a result. The `addHandler` is\n * called when the output Observable is subscribed, and `removeHandler` is\n * called when the Subscription is unsubscribed.\n *\n * @example <caption>Emits clicks happening on the DOM document</caption>\n * function addClickHandler(handler) {\n * document.addEventListener('click', handler);\n * }\n *\n * function removeClickHandler(handler) {\n * document.removeEventListener('click', handler);\n * }\n *\n * var clicks = Rx.Observable.fromEventPattern(\n * addClickHandler,\n * removeClickHandler\n * );\n * clicks.subscribe(x => console.log(x));\n *\n * @see {@link from}\n * @see {@link fromEvent}\n *\n * @param {function(handler: Function): any} addHandler A function that takes\n * a `handler` function as argument and attaches it somehow to the actual\n * source of events.\n * @param {function(handler: Function, signal?: any): void} [removeHandler] An optional function that\n * takes a `handler` function as argument and removes it in case it was\n * previously attached using `addHandler`. if addHandler returns signal to teardown when remove,\n * removeHandler function will forward it.\n * @param {function(...args: any): T} [selector] An optional function to\n * post-process results. It takes the arguments from the event handler and\n * should return a single value.\n * @return {Observable<T>}\n * @static true\n * @name fromEventPattern\n * @owner Observable\n */\n static create<T>(addHandler: (handler: Function) => any,\n removeHandler?: (handler: Function, signal?: any) => void,\n selector?: (...args: Array<any>) => T) {\n return new FromEventPatternObservable(addHandler, removeHandler, selector);\n }\n\n constructor(private addHandler: (handler: Function) => any,\n private removeHandler?: (handler: Function, signal?: any) => void,\n private selector?: (...args: Array<any>) => T) {\n super();\n }\n\n /** @deprecated internal use only */ _subscribe(subscriber: Subscriber<T>) {\n const removeHandler = this.removeHandler;\n\n const handler = !!this.selector ? (...args: Array<any>) => {\n this._callSelector(subscriber, args);\n } : function(e: any) { subscriber.next(e); };\n\n const retValue = this._callAddHandler(handler, subscriber);\n\n if (!isFunction(removeHandler)) {\n return;\n }\n\n subscriber.add(new Subscription(() => {\n //TODO: determine whether or not to forward to error handler\n removeHandler(handler, retValue) ;\n }));\n }\n\n private _callSelector(subscriber: Subscriber<T>, args: Array<any>): void {\n try {\n const result: T = this.selector(...args);\n subscriber.next(result);\n }\n catch (e) {\n subscriber.error(e);\n }\n }\n\n private _callAddHandler(handler: (e: any) => void, errorSubscriber: Subscriber<T>): any | null {\n try {\n return this.addHandler(handler) || null;\n }\n catch (e) {\n errorSubscriber.error(e);\n }\n }\n}\n"]} |