--- /dev/null
+/** PURE_IMPORTS_START tslib,_OuterSubscriber,_util_subscribeToResult PURE_IMPORTS_END */
+import * as tslib_1 from "tslib";
+import { OuterSubscriber } from '../OuterSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+export var defaultThrottleConfig = {
+ leading: true,
+ trailing: false
+};
+export function throttle(durationSelector, config) {
+ if (config === void 0) {
+ config = defaultThrottleConfig;
+ }
+ return function (source) { return source.lift(new ThrottleOperator(durationSelector, config.leading, config.trailing)); };
+}
+var ThrottleOperator = /*@__PURE__*/ (function () {
+ function ThrottleOperator(durationSelector, leading, trailing) {
+ this.durationSelector = durationSelector;
+ this.leading = leading;
+ this.trailing = trailing;
+ }
+ ThrottleOperator.prototype.call = function (subscriber, source) {
+ return source.subscribe(new ThrottleSubscriber(subscriber, this.durationSelector, this.leading, this.trailing));
+ };
+ return ThrottleOperator;
+}());
+var ThrottleSubscriber = /*@__PURE__*/ (function (_super) {
+ tslib_1.__extends(ThrottleSubscriber, _super);
+ function ThrottleSubscriber(destination, durationSelector, _leading, _trailing) {
+ var _this = _super.call(this, destination) || this;
+ _this.destination = destination;
+ _this.durationSelector = durationSelector;
+ _this._leading = _leading;
+ _this._trailing = _trailing;
+ _this._hasValue = false;
+ return _this;
+ }
+ ThrottleSubscriber.prototype._next = function (value) {
+ this._hasValue = true;
+ this._sendValue = value;
+ if (!this._throttled) {
+ if (this._leading) {
+ this.send();
+ }
+ else {
+ this.throttle(value);
+ }
+ }
+ };
+ ThrottleSubscriber.prototype.send = function () {
+ var _a = this, _hasValue = _a._hasValue, _sendValue = _a._sendValue;
+ if (_hasValue) {
+ this.destination.next(_sendValue);
+ this.throttle(_sendValue);
+ }
+ this._hasValue = false;
+ this._sendValue = null;
+ };
+ ThrottleSubscriber.prototype.throttle = function (value) {
+ var duration = this.tryDurationSelector(value);
+ if (!!duration) {
+ this.add(this._throttled = subscribeToResult(this, duration));
+ }
+ };
+ ThrottleSubscriber.prototype.tryDurationSelector = function (value) {
+ try {
+ return this.durationSelector(value);
+ }
+ catch (err) {
+ this.destination.error(err);
+ return null;
+ }
+ };
+ ThrottleSubscriber.prototype.throttlingDone = function () {
+ var _a = this, _throttled = _a._throttled, _trailing = _a._trailing;
+ if (_throttled) {
+ _throttled.unsubscribe();
+ }
+ this._throttled = null;
+ if (_trailing) {
+ this.send();
+ }
+ };
+ ThrottleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+ this.throttlingDone();
+ };
+ ThrottleSubscriber.prototype.notifyComplete = function () {
+ this.throttlingDone();
+ };
+ return ThrottleSubscriber;
+}(OuterSubscriber));
+//# sourceMappingURL=throttle.js.map