222 lines
7.2 KiB
JavaScript
222 lines
7.2 KiB
JavaScript
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import { isFunction } from './util/isFunction';
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import { empty as emptyObserver } from './Observer';
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import { Subscription } from './Subscription';
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import { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';
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import { config } from './config';
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import { hostReportError } from './util/hostReportError';
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export class Subscriber extends Subscription {
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constructor(destinationOrNext, error, complete) {
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super();
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this.syncErrorValue = null;
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this.syncErrorThrown = false;
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this.syncErrorThrowable = false;
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this.isStopped = false;
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switch (arguments.length) {
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case 0:
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this.destination = emptyObserver;
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break;
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case 1:
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if (!destinationOrNext) {
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this.destination = emptyObserver;
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break;
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}
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if (typeof destinationOrNext === 'object') {
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if (destinationOrNext instanceof Subscriber) {
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this.syncErrorThrowable = destinationOrNext.syncErrorThrowable;
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this.destination = destinationOrNext;
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destinationOrNext.add(this);
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}
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else {
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this.syncErrorThrowable = true;
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this.destination = new SafeSubscriber(this, destinationOrNext);
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}
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break;
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}
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default:
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this.syncErrorThrowable = true;
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this.destination = new SafeSubscriber(this, destinationOrNext, error, complete);
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break;
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}
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}
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[rxSubscriberSymbol]() { return this; }
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static create(next, error, complete) {
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const subscriber = new Subscriber(next, error, complete);
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subscriber.syncErrorThrowable = false;
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return subscriber;
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}
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next(value) {
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if (!this.isStopped) {
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this._next(value);
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}
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}
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error(err) {
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if (!this.isStopped) {
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this.isStopped = true;
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this._error(err);
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}
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}
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complete() {
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if (!this.isStopped) {
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this.isStopped = true;
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this._complete();
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}
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}
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unsubscribe() {
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if (this.closed) {
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return;
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}
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this.isStopped = true;
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super.unsubscribe();
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}
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_next(value) {
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this.destination.next(value);
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}
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_error(err) {
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this.destination.error(err);
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this.unsubscribe();
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}
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_complete() {
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this.destination.complete();
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this.unsubscribe();
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}
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_unsubscribeAndRecycle() {
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const { _parentOrParents } = this;
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this._parentOrParents = null;
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this.unsubscribe();
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this.closed = false;
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this.isStopped = false;
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this._parentOrParents = _parentOrParents;
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return this;
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}
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}
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export class SafeSubscriber extends Subscriber {
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constructor(_parentSubscriber, observerOrNext, error, complete) {
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super();
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this._parentSubscriber = _parentSubscriber;
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let next;
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let context = this;
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if (isFunction(observerOrNext)) {
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next = observerOrNext;
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}
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else if (observerOrNext) {
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next = observerOrNext.next;
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error = observerOrNext.error;
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complete = observerOrNext.complete;
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if (observerOrNext !== emptyObserver) {
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context = Object.create(observerOrNext);
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if (isFunction(context.unsubscribe)) {
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this.add(context.unsubscribe.bind(context));
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}
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context.unsubscribe = this.unsubscribe.bind(this);
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}
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}
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this._context = context;
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this._next = next;
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this._error = error;
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this._complete = complete;
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}
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next(value) {
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if (!this.isStopped && this._next) {
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const { _parentSubscriber } = this;
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if (!config.useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {
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this.__tryOrUnsub(this._next, value);
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}
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else if (this.__tryOrSetError(_parentSubscriber, this._next, value)) {
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this.unsubscribe();
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}
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}
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}
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error(err) {
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if (!this.isStopped) {
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const { _parentSubscriber } = this;
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const { useDeprecatedSynchronousErrorHandling } = config;
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if (this._error) {
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if (!useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {
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this.__tryOrUnsub(this._error, err);
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this.unsubscribe();
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}
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else {
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this.__tryOrSetError(_parentSubscriber, this._error, err);
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this.unsubscribe();
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}
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}
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else if (!_parentSubscriber.syncErrorThrowable) {
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this.unsubscribe();
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if (useDeprecatedSynchronousErrorHandling) {
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throw err;
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}
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hostReportError(err);
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}
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else {
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if (useDeprecatedSynchronousErrorHandling) {
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_parentSubscriber.syncErrorValue = err;
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_parentSubscriber.syncErrorThrown = true;
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}
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else {
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hostReportError(err);
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}
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this.unsubscribe();
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}
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}
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}
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complete() {
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if (!this.isStopped) {
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const { _parentSubscriber } = this;
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if (this._complete) {
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const wrappedComplete = () => this._complete.call(this._context);
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if (!config.useDeprecatedSynchronousErrorHandling || !_parentSubscriber.syncErrorThrowable) {
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this.__tryOrUnsub(wrappedComplete);
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this.unsubscribe();
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}
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else {
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this.__tryOrSetError(_parentSubscriber, wrappedComplete);
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this.unsubscribe();
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}
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}
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else {
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this.unsubscribe();
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}
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}
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}
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__tryOrUnsub(fn, value) {
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try {
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fn.call(this._context, value);
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}
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catch (err) {
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this.unsubscribe();
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if (config.useDeprecatedSynchronousErrorHandling) {
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throw err;
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}
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else {
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hostReportError(err);
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}
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}
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}
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__tryOrSetError(parent, fn, value) {
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if (!config.useDeprecatedSynchronousErrorHandling) {
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throw new Error('bad call');
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}
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try {
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fn.call(this._context, value);
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}
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catch (err) {
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if (config.useDeprecatedSynchronousErrorHandling) {
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parent.syncErrorValue = err;
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parent.syncErrorThrown = true;
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return true;
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}
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else {
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hostReportError(err);
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return true;
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}
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}
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return false;
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}
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_unsubscribe() {
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const { _parentSubscriber } = this;
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this._context = null;
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this._parentSubscriber = null;
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_parentSubscriber.unsubscribe();
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}
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}
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//# sourceMappingURL=Subscriber.js.map
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