var noop_1 = require('./util/noop');
var Subscription = (function () {
function Subscription(_unsubscribe) {
this.isUnsubscribed = false;
if (_unsubscribe) {
this._unsubscribe = _unsubscribe;
}
}
Subscription.prototype._unsubscribe = function () {
noop_1.noop();
};
Subscription.prototype.unsubscribe = function () {
if (this.isUnsubscribed) {
return;
}
this.isUnsubscribed = true;
var unsubscribe = this._unsubscribe;
var subscriptions = this._subscriptions;
this._subscriptions = void 0;
if (unsubscribe) {
unsubscribe.call(this);
}
if (subscriptions != null) {
var index = -1;
var len = subscriptions.length;
while (++index < len) {
subscriptions[index].unsubscribe();
}
}
};
Subscription.prototype.add = function (subscription) {
// return early if:
// 1. the subscription is null
// 2. we're attempting to add our this
// 3. we're attempting to add the static `empty` Subscription
if (!subscription || (subscription === this) || (subscription === Subscription.EMPTY)) {
return;
}
var sub = subscription;
switch (typeof subscription) {
case 'function':
sub = new Subscription(subscription);
case 'object':
if (sub.isUnsubscribed || typeof sub.unsubscribe !== 'function') {
break;
}
else if (this.isUnsubscribed) {
sub.unsubscribe();
}
else {
var subscriptions = this._subscriptions || (this._subscriptions = []);
subscriptions.push(sub);
}
break;
default:
throw new Error('Unrecognized subscription ' + subscription + ' added to Subscription.');
}
};
Subscription.prototype.remove = function (subscription) {
// return early if:
// 1. the subscription is null
// 2. we're attempting to remove ourthis
// 3. we're attempting to remove the static `empty` Subscription
Iif (subscription == null || (subscription === this) || (subscription === Subscription.EMPTY)) {
return;
}
var subscriptions = this._subscriptions;
if (subscriptions) {
var subscriptionIndex = subscriptions.indexOf(subscription);
if (subscriptionIndex !== -1) {
subscriptions.splice(subscriptionIndex, 1);
}
}
};
Subscription.EMPTY = (function (empty) {
empty.isUnsubscribed = true;
return empty;
}(new Subscription()));
return Subscription;
})();
exports.Subscription = Subscription;
//# sourceMappingURL=Subscription.js.map |