auditTime.js
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"use strict";
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var async_1 = require('../scheduler/async');
var Subscriber_1 = require('../Subscriber');
/**
* Ignores source values for `duration` milliseconds, then emits the most recent
* value from the source Observable, then repeats this process.
*
* <span class="informal">When it sees a source values, it ignores that plus
* the next ones for `duration` milliseconds, and then it emits the most recent
* value from the source.</span>
*
* <img src="./img/auditTime.png" width="100%">
*
* `auditTime` is similar to `throttleTime`, but emits the last value from the
* silenced time window, instead of the first value. `auditTime` emits the most
* recent value from the source Observable on the output Observable as soon as
* its internal timer becomes disabled, and ignores source values while the
* timer is enabled. Initially, the timer is disabled. As soon as the first
* source value arrives, the timer is enabled. After `duration` milliseconds (or
* the time unit determined internally by the optional `scheduler`) has passed,
* the timer is disabled, then the most recent source value is emitted on the
* output Observable, and this process repeats for the next source value.
* Optionally takes a {@link Scheduler} for managing timers.
*
* @example <caption>Emit clicks at a rate of at most one click per second</caption>
* var clicks = Rx.Observable.fromEvent(document, 'click');
* var result = clicks.auditTime(1000);
* result.subscribe(x => console.log(x));
*
* @see {@link audit}
* @see {@link debounceTime}
* @see {@link delay}
* @see {@link sampleTime}
* @see {@link throttleTime}
*
* @param {number} duration Time to wait before emitting the most recent source
* value, measured in milliseconds or the time unit determined internally
* by the optional `scheduler`.
* @param {Scheduler} [scheduler=async] The {@link Scheduler} to use for
* managing the timers that handle the rate-limiting behavior.
* @return {Observable<T>} An Observable that performs rate-limiting of
* emissions from the source Observable.
* @method auditTime
* @owner Observable
*/
function auditTime(duration, scheduler) {
if (scheduler === void 0) { scheduler = async_1.async; }
return this.lift(new AuditTimeOperator(duration, scheduler));
}
exports.auditTime = auditTime;
var AuditTimeOperator = (function () {
function AuditTimeOperator(duration, scheduler) {
this.duration = duration;
this.scheduler = scheduler;
}
AuditTimeOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new AuditTimeSubscriber(subscriber, this.duration, this.scheduler));
};
return AuditTimeOperator;
}());
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var AuditTimeSubscriber = (function (_super) {
__extends(AuditTimeSubscriber, _super);
function AuditTimeSubscriber(destination, duration, scheduler) {
_super.call(this, destination);
this.duration = duration;
this.scheduler = scheduler;
this.hasValue = false;
}
AuditTimeSubscriber.prototype._next = function (value) {
this.value = value;
this.hasValue = true;
if (!this.throttled) {
this.add(this.throttled = this.scheduler.schedule(dispatchNext, this.duration, this));
}
};
AuditTimeSubscriber.prototype.clearThrottle = function () {
var _a = this, value = _a.value, hasValue = _a.hasValue, throttled = _a.throttled;
if (throttled) {
this.remove(throttled);
this.throttled = null;
throttled.unsubscribe();
}
if (hasValue) {
this.value = null;
this.hasValue = false;
this.destination.next(value);
}
};
return AuditTimeSubscriber;
}(Subscriber_1.Subscriber));
function dispatchNext(subscriber) {
subscriber.clearThrottle();
}
//# sourceMappingURL=auditTime.js.map