Subscription.js
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import { __read, __spreadArray, __values } from "tslib";
import { isFunction } from './util/isFunction';
import { UnsubscriptionError } from './util/UnsubscriptionError';
import { arrRemove } from './util/arrRemove';
var Subscription = (function () {
function Subscription(initialTeardown) {
this.initialTeardown = initialTeardown;
this.closed = false;
this._parentage = null;
this._finalizers = null;
}
Subscription.prototype.unsubscribe = function () {
var e_1, _a, e_2, _b;
var errors;
if (!this.closed) {
this.closed = true;
var _parentage = this._parentage;
if (_parentage) {
this._parentage = null;
if (Array.isArray(_parentage)) {
try {
for (var _parentage_1 = __values(_parentage), _parentage_1_1 = _parentage_1.next(); !_parentage_1_1.done; _parentage_1_1 = _parentage_1.next()) {
var parent_1 = _parentage_1_1.value;
parent_1.remove(this);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_parentage_1_1 && !_parentage_1_1.done && (_a = _parentage_1.return)) _a.call(_parentage_1);
}
finally { if (e_1) throw e_1.error; }
}
}
else {
_parentage.remove(this);
}
}
var initialFinalizer = this.initialTeardown;
if (isFunction(initialFinalizer)) {
try {
initialFinalizer();
}
catch (e) {
errors = e instanceof UnsubscriptionError ? e.errors : [e];
}
}
var _finalizers = this._finalizers;
if (_finalizers) {
this._finalizers = null;
try {
for (var _finalizers_1 = __values(_finalizers), _finalizers_1_1 = _finalizers_1.next(); !_finalizers_1_1.done; _finalizers_1_1 = _finalizers_1.next()) {
var finalizer = _finalizers_1_1.value;
try {
execFinalizer(finalizer);
}
catch (err) {
errors = errors !== null && errors !== void 0 ? errors : [];
if (err instanceof UnsubscriptionError) {
errors = __spreadArray(__spreadArray([], __read(errors)), __read(err.errors));
}
else {
errors.push(err);
}
}
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (_finalizers_1_1 && !_finalizers_1_1.done && (_b = _finalizers_1.return)) _b.call(_finalizers_1);
}
finally { if (e_2) throw e_2.error; }
}
}
if (errors) {
throw new UnsubscriptionError(errors);
}
}
};
Subscription.prototype.add = function (teardown) {
var _a;
if (teardown && teardown !== this) {
if (this.closed) {
execFinalizer(teardown);
}
else {
if (teardown instanceof Subscription) {
if (teardown.closed || teardown._hasParent(this)) {
return;
}
teardown._addParent(this);
}
(this._finalizers = (_a = this._finalizers) !== null && _a !== void 0 ? _a : []).push(teardown);
}
}
};
Subscription.prototype._hasParent = function (parent) {
var _parentage = this._parentage;
return _parentage === parent || (Array.isArray(_parentage) && _parentage.includes(parent));
};
Subscription.prototype._addParent = function (parent) {
var _parentage = this._parentage;
this._parentage = Array.isArray(_parentage) ? (_parentage.push(parent), _parentage) : _parentage ? [_parentage, parent] : parent;
};
Subscription.prototype._removeParent = function (parent) {
var _parentage = this._parentage;
if (_parentage === parent) {
this._parentage = null;
}
else if (Array.isArray(_parentage)) {
arrRemove(_parentage, parent);
}
};
Subscription.prototype.remove = function (teardown) {
var _finalizers = this._finalizers;
_finalizers && arrRemove(_finalizers, teardown);
if (teardown instanceof Subscription) {
teardown._removeParent(this);
}
};
Subscription.EMPTY = (function () {
var empty = new Subscription();
empty.closed = true;
return empty;
})();
return Subscription;
}());
export { Subscription };
export var EMPTY_SUBSCRIPTION = Subscription.EMPTY;
export function isSubscription(value) {
return (value instanceof Subscription ||
(value && 'closed' in value && isFunction(value.remove) && isFunction(value.add) && isFunction(value.unsubscribe)));
}
function execFinalizer(finalizer) {
if (isFunction(finalizer)) {
finalizer();
}
else {
finalizer.unsubscribe();
}
}
//# sourceMappingURL=Subscription.js.map