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- {"ast":null,"code":"import { OuterSubscriber } from '../OuterSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nexport const defaultThrottleConfig = {\n leading: true,\n trailing: false\n};\nexport function throttle(durationSelector, config = defaultThrottleConfig) {\n return source => source.lift(new ThrottleOperator(durationSelector, config.leading, config.trailing));\n}\nclass ThrottleOperator {\n constructor(durationSelector, leading, trailing) {\n this.durationSelector = durationSelector;\n this.leading = leading;\n this.trailing = trailing;\n }\n call(subscriber, source) {\n return source.subscribe(new ThrottleSubscriber(subscriber, this.durationSelector, this.leading, this.trailing));\n }\n}\nclass ThrottleSubscriber extends OuterSubscriber {\n constructor(destination, durationSelector, _leading, _trailing) {\n super(destination);\n this.destination = destination;\n this.durationSelector = durationSelector;\n this._leading = _leading;\n this._trailing = _trailing;\n this._hasValue = false;\n }\n _next(value) {\n this._hasValue = true;\n this._sendValue = value;\n if (!this._throttled) {\n if (this._leading) {\n this.send();\n } else {\n this.throttle(value);\n }\n }\n }\n send() {\n const {\n _hasValue,\n _sendValue\n } = this;\n if (_hasValue) {\n this.destination.next(_sendValue);\n this.throttle(_sendValue);\n }\n this._hasValue = false;\n this._sendValue = null;\n }\n throttle(value) {\n const duration = this.tryDurationSelector(value);\n if (!!duration) {\n this.add(this._throttled = subscribeToResult(this, duration));\n }\n }\n tryDurationSelector(value) {\n try {\n return this.durationSelector(value);\n } catch (err) {\n this.destination.error(err);\n return null;\n }\n }\n throttlingDone() {\n const {\n _throttled,\n _trailing\n } = this;\n if (_throttled) {\n _throttled.unsubscribe();\n }\n this._throttled = null;\n if (_trailing) {\n this.send();\n }\n }\n notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {\n this.throttlingDone();\n }\n notifyComplete() {\n this.throttlingDone();\n }\n}\n//# sourceMappingURL=throttle.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}
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