91 lines
3.2 KiB
JavaScript
91 lines
3.2 KiB
JavaScript
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/** PURE_IMPORTS_START tslib,_innerSubscribe PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';
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export var defaultThrottleConfig = {
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leading: true,
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trailing: false
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};
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export function throttle(durationSelector, config) {
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if (config === void 0) {
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config = defaultThrottleConfig;
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}
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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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var ThrottleOperator = /*@__PURE__*/ (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 = /*@__PURE__*/ (function (_super) {
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tslib_1.__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 = undefined;
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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 = innerSubscribe(duration, new SimpleInnerSubscriber(this)));
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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 = undefined;
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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 () {
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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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}(SimpleOuterSubscriber));
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//# sourceMappingURL=throttle.js.map
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