75 lines
2.2 KiB
JavaScript
75 lines
2.2 KiB
JavaScript
|
import { Subscription } from '../Subscription';
|
||
|
|
import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';
|
||
|
|
export function bufferWhen(closingSelector) {
|
||
|
|
return function (source) {
|
||
|
|
return source.lift(new BufferWhenOperator(closingSelector));
|
||
|
|
};
|
||
|
|
}
|
||
|
|
class BufferWhenOperator {
|
||
|
|
constructor(closingSelector) {
|
||
|
|
this.closingSelector = closingSelector;
|
||
|
|
}
|
||
|
|
call(subscriber, source) {
|
||
|
|
return source.subscribe(new BufferWhenSubscriber(subscriber, this.closingSelector));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
class BufferWhenSubscriber extends SimpleOuterSubscriber {
|
||
|
|
constructor(destination, closingSelector) {
|
||
|
|
super(destination);
|
||
|
|
this.closingSelector = closingSelector;
|
||
|
|
this.subscribing = false;
|
||
|
|
this.openBuffer();
|
||
|
|
}
|
||
|
|
_next(value) {
|
||
|
|
this.buffer.push(value);
|
||
|
|
}
|
||
|
|
_complete() {
|
||
|
|
const buffer = this.buffer;
|
||
|
|
if (buffer) {
|
||
|
|
this.destination.next(buffer);
|
||
|
|
}
|
||
|
|
super._complete();
|
||
|
|
}
|
||
|
|
_unsubscribe() {
|
||
|
|
this.buffer = undefined;
|
||
|
|
this.subscribing = false;
|
||
|
|
}
|
||
|
|
notifyNext() {
|
||
|
|
this.openBuffer();
|
||
|
|
}
|
||
|
|
notifyComplete() {
|
||
|
|
if (this.subscribing) {
|
||
|
|
this.complete();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
this.openBuffer();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
openBuffer() {
|
||
|
|
let { closingSubscription } = this;
|
||
|
|
if (closingSubscription) {
|
||
|
|
this.remove(closingSubscription);
|
||
|
|
closingSubscription.unsubscribe();
|
||
|
|
}
|
||
|
|
const buffer = this.buffer;
|
||
|
|
if (this.buffer) {
|
||
|
|
this.destination.next(buffer);
|
||
|
|
}
|
||
|
|
this.buffer = [];
|
||
|
|
let closingNotifier;
|
||
|
|
try {
|
||
|
|
const { closingSelector } = this;
|
||
|
|
closingNotifier = closingSelector();
|
||
|
|
}
|
||
|
|
catch (err) {
|
||
|
|
return this.error(err);
|
||
|
|
}
|
||
|
|
closingSubscription = new Subscription();
|
||
|
|
this.closingSubscription = closingSubscription;
|
||
|
|
this.add(closingSubscription);
|
||
|
|
this.subscribing = true;
|
||
|
|
closingSubscription.add(innerSubscribe(closingNotifier, new SimpleInnerSubscriber(this)));
|
||
|
|
this.subscribing = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=bufferWhen.js.map
|