"use strict";
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subject_1 = require('./Subject');
var queue_1 = require('./scheduler/queue');
var observeOn_1 = require('./operator/observeOn');
/**
 * @class ReplaySubject<T>
 */
var ReplaySubject = (function (_super) {
    __extends(ReplaySubject, _super);
    function ReplaySubject(bufferSize, windowTime, scheduler) {
        if (bufferSize === void 0) { bufferSize = Number.POSITIVE_INFINITY; }
        if (windowTime === void 0) { windowTime = Number.POSITIVE_INFINITY; }
        _super.call(this);
        this.events = [];
        this.scheduler = scheduler;
        this.bufferSize = bufferSize < 1 ? 1 : bufferSize;
        this._windowTime = windowTime < 1 ? 1 : windowTime;
    }
    ReplaySubject.prototype._next = function (value) {
        var now = this._getNow();
        this.events.push(new ReplayEvent(now, value));
        this._trimBufferThenGetEvents(now);
        _super.prototype._next.call(this, value);
    };
    ReplaySubject.prototype._subscribe = function (subscriber) {
        var events = this._trimBufferThenGetEvents(this._getNow());
        var scheduler = this.scheduler;
        if (scheduler) {
            subscriber.add(subscriber = new observeOn_1.ObserveOnSubscriber(subscriber, scheduler));
        }
        var index = -1;
        var len = events.length;
        while (++index < len && !subscriber.isUnsubscribed) {
            subscriber.next(events[index].value);
        }
        return _super.prototype._subscribe.call(this, subscriber);
    };
    ReplaySubject.prototype._getNow = function () {
        return (this.scheduler || queue_1.queue).now();
    };
    ReplaySubject.prototype._trimBufferThenGetEvents = function (now) {
        var bufferSize = this.bufferSize;
        var _windowTime = this._windowTime;
        var events = this.events;
        var eventsCount = events.length;
        var spliceCount = 0;
        // Trim events that fall out of the time window.
        // Start at the front of the list. Break early once
        // we encounter an event that falls within the window.
        while (spliceCount < eventsCount) {
            if ((now - events[spliceCount].time) < _windowTime) {
                break;
            }
            spliceCount += 1;
        }
        if (eventsCount > bufferSize) {
            spliceCount = Math.max(spliceCount, eventsCount - bufferSize);
        }
        if (spliceCount > 0) {
            events.splice(0, spliceCount);
        }
        return events;
    };
    return ReplaySubject;
}(Subject_1.Subject));
exports.ReplaySubject = ReplaySubject;
var ReplayEvent = (function () {
    function ReplayEvent(time, value) {
        this.time = time;
        this.value = value;
    }
    return ReplayEvent;
}());
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