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[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / rxjs / src / internal / operators / exhaust.ts

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/exhaust.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/exhaust.ts
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+import { Operator } from '../Operator';
+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { Subscription } from '../Subscription';
+import { OuterSubscriber } from '../OuterSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { ObservableInput, OperatorFunction, TeardownLogic } from '../types';
+
+export function exhaust<T>(): OperatorFunction<ObservableInput<T>, T>;
+export function exhaust<R>(): OperatorFunction<any, R>;
+
+/**
+ * Converts a higher-order Observable into a first-order Observable by dropping
+ * inner Observables while the previous inner Observable has not yet completed.
+ *
+ * <span class="informal">Flattens an Observable-of-Observables by dropping the
+ * next inner Observables while the current inner is still executing.</span>
+ *
+ * ![](exhaust.png)
+ *
+ * `exhaust` subscribes to an Observable that emits Observables, also known as a
+ * higher-order Observable. Each time it observes one of these emitted inner
+ * Observables, the output Observable begins emitting the items emitted by that
+ * inner Observable. So far, it behaves like {@link mergeAll}. However,
+ * `exhaust` ignores every new inner Observable if the previous Observable has
+ * not yet completed. Once that one completes, it will accept and flatten the
+ * next inner Observable and repeat this process.
+ *
+ * ## Example
+ * Run a finite timer for each click, only if there is no currently active timer
+ * ```ts
+ * import { fromEvent, interval } from 'rxjs';
+ * import { exhaust, map, take } from 'rxjs/operators';
+ *
+ * const clicks = fromEvent(document, 'click');
+ * const higherOrder = clicks.pipe(
+ *   map((ev) => interval(1000).pipe(take(5))),
+ * );
+ * const result = higherOrder.pipe(exhaust());
+ * result.subscribe(x => console.log(x));
+ * ```
+ *
+ * @see {@link combineAll}
+ * @see {@link concatAll}
+ * @see {@link switchAll}
+ * @see {@link switchMap}
+ * @see {@link mergeAll}
+ * @see {@link exhaustMap}
+ * @see {@link zipAll}
+ *
+ * @return {Observable} An Observable that takes a source of Observables and propagates the first observable
+ * exclusively until it completes before subscribing to the next.
+ * @method exhaust
+ * @owner Observable
+ */
+export function exhaust<T>(): OperatorFunction<any, T> {
+  return (source: Observable<T>) => source.lift(new SwitchFirstOperator<T>());
+}
+
+class SwitchFirstOperator<T> implements Operator<T, T> {
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new SwitchFirstSubscriber(subscriber));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class SwitchFirstSubscriber<T> extends OuterSubscriber<T, T> {
+  private hasCompleted: boolean = false;
+  private hasSubscription: boolean = false;
+
+  constructor(destination: Subscriber<T>) {
+    super(destination);
+  }
+
+  protected _next(value: T): void {
+    if (!this.hasSubscription) {
+      this.hasSubscription = true;
+      this.add(subscribeToResult(this, value));
+    }
+  }
+
+  protected _complete(): void {
+    this.hasCompleted = true;
+    if (!this.hasSubscription) {
+      this.destination.complete();
+    }
+  }
+
+  notifyComplete(innerSub: Subscription): void {
+    this.remove(innerSub);
+    this.hasSubscription = false;
+    if (this.hasCompleted) {
+      this.destination.complete();
+    }
+  }
+}