28 lines
653 B
TypeScript
28 lines
653 B
TypeScript
import { Observable, Subscription } from 'rxjs';
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export class UmbObserver<T> {
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#source!: Observable<T>;
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#callback!: (_value: T) => void;
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#subscription!: Subscription;
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constructor(source: Observable<T>, callback: (_value: T) => void) {
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this.#source = source;
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this.#subscription = source.subscribe(callback);
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}
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hostConnected() {
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if (this.#subscription.closed) {
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this.#subscription = this.#source.subscribe(this.#callback);
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}
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}
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hostDisconnected() {
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// No cause then it cant re-connect, if the same element just was moved in DOM.
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//this.#subscription.unsubscribe();
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}
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destroy(): void {
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this.#subscription.unsubscribe();
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}
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}
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