103 lines
3.8 KiB
JavaScript
103 lines
3.8 KiB
JavaScript
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"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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}
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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var OuterSubscriber_1 = require("../OuterSubscriber");
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var subscribeToResult_1 = require("../util/subscribeToResult");
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exports.defaultThrottleConfig = {
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leading: true,
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trailing: false
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};
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function throttle(durationSelector, config) {
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if (config === void 0) { config = exports.defaultThrottleConfig; }
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return function (source) { return source.lift(new ThrottleOperator(durationSelector, config.leading, config.trailing)); };
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}
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exports.throttle = throttle;
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var ThrottleOperator = (function () {
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function ThrottleOperator(durationSelector, leading, trailing) {
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this.durationSelector = durationSelector;
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this.leading = leading;
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this.trailing = trailing;
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}
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ThrottleOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new ThrottleSubscriber(subscriber, this.durationSelector, this.leading, this.trailing));
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};
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return ThrottleOperator;
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}());
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var ThrottleSubscriber = (function (_super) {
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__extends(ThrottleSubscriber, _super);
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function ThrottleSubscriber(destination, durationSelector, _leading, _trailing) {
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var _this = _super.call(this, destination) || this;
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_this.destination = destination;
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_this.durationSelector = durationSelector;
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_this._leading = _leading;
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_this._trailing = _trailing;
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_this._hasValue = false;
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return _this;
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}
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ThrottleSubscriber.prototype._next = function (value) {
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this._hasValue = true;
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this._sendValue = value;
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if (!this._throttled) {
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if (this._leading) {
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this.send();
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}
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else {
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this.throttle(value);
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}
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}
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};
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ThrottleSubscriber.prototype.send = function () {
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var _a = this, _hasValue = _a._hasValue, _sendValue = _a._sendValue;
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if (_hasValue) {
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this.destination.next(_sendValue);
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this.throttle(_sendValue);
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}
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this._hasValue = false;
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this._sendValue = null;
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};
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ThrottleSubscriber.prototype.throttle = function (value) {
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var duration = this.tryDurationSelector(value);
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if (!!duration) {
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this.add(this._throttled = subscribeToResult_1.subscribeToResult(this, duration));
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}
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};
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ThrottleSubscriber.prototype.tryDurationSelector = function (value) {
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try {
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return this.durationSelector(value);
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}
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catch (err) {
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this.destination.error(err);
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return null;
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}
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};
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ThrottleSubscriber.prototype.throttlingDone = function () {
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var _a = this, _throttled = _a._throttled, _trailing = _a._trailing;
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if (_throttled) {
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_throttled.unsubscribe();
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}
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this._throttled = null;
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if (_trailing) {
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this.send();
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}
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};
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ThrottleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
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this.throttlingDone();
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};
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ThrottleSubscriber.prototype.notifyComplete = function () {
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this.throttlingDone();
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};
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return ThrottleSubscriber;
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}(OuterSubscriber_1.OuterSubscriber));
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//# sourceMappingURL=throttle.js.map
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