om/node_modules/rxjs/_esm5/internal/operators/throttleTime.js

/** PURE_IMPORTS_START tslib,_Subscriber,_scheduler_async,_throttle PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Subscriber } from '../Subscriber';
import { async } from '../scheduler/async';
import { defaultThrottleConfig } from './throttle';
export function throttleTime(duration, scheduler, config) {
    if (scheduler === void 0) {
        scheduler = async;
    }
    if (config === void 0) {
        config = defaultThrottleConfig;
    }
    return function (source) { return source.lift(new ThrottleTimeOperator(duration, scheduler, config.leading, config.trailing)); };
}
var ThrottleTimeOperator = /*@__PURE__*/ (function () {
    function ThrottleTimeOperator(duration, scheduler, leading, trailing) {
        this.duration = duration;
        this.scheduler = scheduler;
        this.leading = leading;
        this.trailing = trailing;
    }
    ThrottleTimeOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new ThrottleTimeSubscriber(subscriber, this.duration, this.scheduler, this.leading, this.trailing));
    };
    return ThrottleTimeOperator;
}());
var ThrottleTimeSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(ThrottleTimeSubscriber, _super);
    function ThrottleTimeSubscriber(destination, duration, scheduler, leading, trailing) {
        var _this = _super.call(this, destination) || this;
        _this.duration = duration;
        _this.scheduler = scheduler;
        _this.leading = leading;
        _this.trailing = trailing;
        _this._hasTrailingValue = false;
        _this._trailingValue = null;
        return _this;
    }
    ThrottleTimeSubscriber.prototype._next = function (value) {
        if (this.throttled) {
            if (this.trailing) {
                this._trailingValue = value;
                this._hasTrailingValue = true;
            }
        }
        else {
            this.add(this.throttled = this.scheduler.schedule(dispatchNext, this.duration, { subscriber: this }));
            if (this.leading) {
                this.destination.next(value);
            }
            else if (this.trailing) {
                this._trailingValue = value;
                this._hasTrailingValue = true;
            }
        }
    };
    ThrottleTimeSubscriber.prototype._complete = function () {
        if (this._hasTrailingValue) {
            this.destination.next(this._trailingValue);
            this.destination.complete();
        }
        else {
            this.destination.complete();
        }
    };
    ThrottleTimeSubscriber.prototype.clearThrottle = function () {
        var throttled = this.throttled;
        if (throttled) {
            if (this.trailing && this._hasTrailingValue) {
                this.destination.next(this._trailingValue);
                this._trailingValue = null;
                this._hasTrailingValue = false;
            }
            throttled.unsubscribe();
            this.remove(throttled);
            this.throttled = null;
        }
    };
    return ThrottleTimeSubscriber;
}(Subscriber));
function dispatchNext(arg) {
    var subscriber = arg.subscriber;
    subscriber.clearThrottle();
}
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