93 lines
No EOL
3.1 KiB
JavaScript
Executable file
93 lines
No EOL
3.1 KiB
JavaScript
Executable file
import { SafeSubscriber, Subscriber } from './Subscriber';
|
|
import { isSubscription } from './Subscription';
|
|
import { observable as Symbol_observable } from './symbol/observable';
|
|
import { pipeFromArray } from './util/pipe';
|
|
import { config } from './config';
|
|
import { isFunction } from './util/isFunction';
|
|
import { errorContext } from './util/errorContext';
|
|
export class Observable {
|
|
constructor(subscribe) {
|
|
if (subscribe) {
|
|
this._subscribe = subscribe;
|
|
}
|
|
}
|
|
lift(operator) {
|
|
const observable = new Observable();
|
|
observable.source = this;
|
|
observable.operator = operator;
|
|
return observable;
|
|
}
|
|
subscribe(observerOrNext, error, complete) {
|
|
const subscriber = isSubscriber(observerOrNext) ? observerOrNext : new SafeSubscriber(observerOrNext, error, complete);
|
|
errorContext(() => {
|
|
const { operator, source } = this;
|
|
subscriber.add(operator
|
|
?
|
|
operator.call(subscriber, source)
|
|
: source
|
|
?
|
|
this._subscribe(subscriber)
|
|
:
|
|
this._trySubscribe(subscriber));
|
|
});
|
|
return subscriber;
|
|
}
|
|
_trySubscribe(sink) {
|
|
try {
|
|
return this._subscribe(sink);
|
|
}
|
|
catch (err) {
|
|
sink.error(err);
|
|
}
|
|
}
|
|
forEach(next, promiseCtor) {
|
|
promiseCtor = getPromiseCtor(promiseCtor);
|
|
return new promiseCtor((resolve, reject) => {
|
|
const subscriber = new SafeSubscriber({
|
|
next: (value) => {
|
|
try {
|
|
next(value);
|
|
}
|
|
catch (err) {
|
|
reject(err);
|
|
subscriber.unsubscribe();
|
|
}
|
|
},
|
|
error: reject,
|
|
complete: resolve,
|
|
});
|
|
this.subscribe(subscriber);
|
|
});
|
|
}
|
|
_subscribe(subscriber) {
|
|
var _a;
|
|
return (_a = this.source) === null || _a === void 0 ? void 0 : _a.subscribe(subscriber);
|
|
}
|
|
[Symbol_observable]() {
|
|
return this;
|
|
}
|
|
pipe(...operations) {
|
|
return pipeFromArray(operations)(this);
|
|
}
|
|
toPromise(promiseCtor) {
|
|
promiseCtor = getPromiseCtor(promiseCtor);
|
|
return new promiseCtor((resolve, reject) => {
|
|
let value;
|
|
this.subscribe((x) => (value = x), (err) => reject(err), () => resolve(value));
|
|
});
|
|
}
|
|
}
|
|
Observable.create = (subscribe) => {
|
|
return new Observable(subscribe);
|
|
};
|
|
function getPromiseCtor(promiseCtor) {
|
|
var _a;
|
|
return (_a = promiseCtor !== null && promiseCtor !== void 0 ? promiseCtor : config.Promise) !== null && _a !== void 0 ? _a : Promise;
|
|
}
|
|
function isObserver(value) {
|
|
return value && isFunction(value.next) && isFunction(value.error) && isFunction(value.complete);
|
|
}
|
|
function isSubscriber(value) {
|
|
return (value && value instanceof Subscriber) || (isObserver(value) && isSubscription(value));
|
|
}
|
|
//# sourceMappingURL=Observable.js.map
|