61 lines
1.9 KiB
JavaScript
61 lines
1.9 KiB
JavaScript
|
import { Observable } from '../Observable';
|
||
|
|
import { ScalarObservable } from './ScalarObservable';
|
||
|
|
import { EmptyObservable } from './EmptyObservable';
|
||
|
|
/**
|
||
|
|
* We need this JSDoc comment for affecting ESDoc.
|
||
|
|
* @extends {Ignored}
|
||
|
|
* @hide true
|
||
|
|
*/
|
||
|
|
export class ArrayLikeObservable extends Observable {
|
||
|
|
constructor(arrayLike, scheduler) {
|
||
|
|
super();
|
||
|
|
this.arrayLike = arrayLike;
|
||
|
|
this.scheduler = scheduler;
|
||
|
|
if (!scheduler && arrayLike.length === 1) {
|
||
|
|
this._isScalar = true;
|
||
|
|
this.value = arrayLike[0];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
static create(arrayLike, scheduler) {
|
||
|
|
const length = arrayLike.length;
|
||
|
|
if (length === 0) {
|
||
|
|
return new EmptyObservable();
|
||
|
|
}
|
||
|
|
else if (length === 1) {
|
||
|
|
return new ScalarObservable(arrayLike[0], scheduler);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
return new ArrayLikeObservable(arrayLike, scheduler);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
static dispatch(state) {
|
||
|
|
const { arrayLike, index, length, subscriber } = state;
|
||
|
|
if (subscriber.closed) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (index >= length) {
|
||
|
|
subscriber.complete();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
subscriber.next(arrayLike[index]);
|
||
|
|
state.index = index + 1;
|
||
|
|
this.schedule(state);
|
||
|
|
}
|
||
|
|
/** @deprecated internal use only */ _subscribe(subscriber) {
|
||
|
|
let index = 0;
|
||
|
|
const { arrayLike, scheduler } = this;
|
||
|
|
const length = arrayLike.length;
|
||
|
|
if (scheduler) {
|
||
|
|
return scheduler.schedule(ArrayLikeObservable.dispatch, 0, {
|
||
|
|
arrayLike, index, length, subscriber
|
||
|
|
});
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
for (let i = 0; i < length && !subscriber.closed; i++) {
|
||
|
|
subscriber.next(arrayLike[i]);
|
||
|
|
}
|
||
|
|
subscriber.complete();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=ArrayLikeObservable.js.map
|