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Versions: 14
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Contents
/**
* Creates an observable sequence from an event emitter via an addHandler/removeHandler pair.
* @param {Function} addHandler The function to add a handler to the emitter.
* @param {Function} [removeHandler] The optional function to remove a handler from an emitter.
* @param {Function} [selector] A selector which takes the arguments from the event handler to produce a single item to yield on next.
* @returns {Observable} An observable sequence which wraps an event from an event emitter
*/
var fromEventPattern = Observable.fromEventPattern = function (addHandler, removeHandler, selector) {
return new AnonymousObservable(function (observer) {
function innerHandler (e) {
var result = e;
if (selector) {
try {
result = selector(arguments);
} catch (err) {
return observer.onError(err);
}
}
observer.onNext(result);
}
var returnValue = addHandler(innerHandler);
return disposableCreate(function () {
if (removeHandler) {
removeHandler(innerHandler, returnValue);
}
});
}).publish().refCount();
};
Version data entries
14 entries across 7 versions & 1 rubygems