es6/Subject.js

import { Observable } from './Observable';
import { Subscriber } from './Subscriber';
import { Subscription } from './Subscription';
import { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';
import { SubjectSubscription } from './SubjectSubscription';
import { $$rxSubscriber } from './symbol/rxSubscriber';
/**
 * @class SubjectSubscriber<T>
 */
export var SubjectSubscriber = (function (_super) {
    __extends(SubjectSubscriber, _super);
    function SubjectSubscriber(destination) {
        _super.call(this, destination);
        this.destination = destination;
    }
    return SubjectSubscriber;
}(Subscriber));
/**
 * @class Subject<T>
 */
export var Subject = (function (_super) {
    __extends(Subject, _super);
    function Subject() {
        _super.call(this);
        this.observers = [];
        this.closed = false;
        this.isStopped = false;
        this.hasError = false;
        this.thrownError = null;
    }
    Subject.prototype[$$rxSubscriber] = function () {
        return new SubjectSubscriber(this);
    };
    Subject.prototype.lift = function (operator) {
        var subject = new AnonymousSubject(this, this);
        subject.operator = operator;
        return subject;
    };
    Subject.prototype.next = function (value) {
        if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        if (!this.isStopped) {
            var observers = this.observers;
            var len = observers.length;
            var copy = observers.slice();
            for (var i = 0; i < len; i++) {
                copy[i].next(value);
            }
        }
    };
    Subject.prototype.error = function (err) {
        if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        this.hasError = true;
        this.thrownError = err;
        this.isStopped = true;
        var observers = this.observers;
        var len = observers.length;
        var copy = observers.slice();
        for (var i = 0; i < len; i++) {
            copy[i].error(err);
        }
        this.observers.length = 0;
    };
    Subject.prototype.complete = function () {
        if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        this.isStopped = true;
        var observers = this.observers;
        var len = observers.length;
        var copy = observers.slice();
        for (var i = 0; i < len; i++) {
            copy[i].complete();
        }
        this.observers.length = 0;
    };
    Subject.prototype.unsubscribe = function () {
        this.isStopped = true;
        this.closed = true;
        this.observers = null;
    };
    Subject.prototype._subscribe = function (subscriber) {
        if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        else if (this.hasError) {
            subscriber.error(this.thrownError);
            return Subscription.EMPTY;
        }
        else if (this.isStopped) {
            subscriber.complete();
            return Subscription.EMPTY;
        }
        else {
            this.observers.push(subscriber);
            return new SubjectSubscription(this, subscriber);
        }
    };
    Subject.prototype.asObservable = function () {
        var observable = new Observable();
        observable.source = this;
        return observable;
    };
    Subject.create = function (destination, source) {
        return new AnonymousSubject(destination, source);
    };
    return Subject;
}(Observable));
/**
 * @class AnonymousSubject<T>
 */
export var AnonymousSubject = (function (_super) {
    __extends(AnonymousSubject, _super);
    function AnonymousSubject(destination, source) {
        _super.call(this);
        this.destination = destination;
        this.source = source;
    }
    AnonymousSubject.prototype.next = function (value) {
        var destination = this.destination;
        if (destination && destination.next) {
            destination.next(value);
        }
    };
    AnonymousSubject.prototype.error = function (err) {
        var destination = this.destination;
        if (destination && destination.error) {
            this.destination.error(err);
        }
    };
    AnonymousSubject.prototype.complete = function () {
        var destination = this.destination;
        if (destination && destination.complete) {
            this.destination.complete();
        }
    };
    AnonymousSubject.prototype._subscribe = function (subscriber) {
        var source = this.source;
        if (source) {
            return this.source.subscribe(subscriber);
        }
        else {
            return Subscription.EMPTY;
        }
    };
    return AnonymousSubject;
}(Subject));
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