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

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/debounceTime.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/debounceTime.ts
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+import { Operator } from '../Operator';
+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { Subscription } from '../Subscription';
+import { async } from '../scheduler/async';
+import { MonoTypeOperatorFunction, SchedulerLike, TeardownLogic } from '../types';
+
+/**
+ * Emits a value from the source Observable only after a particular time span
+ * has passed without another source emission.
+ *
+ * <span class="informal">It's like {@link delay}, but passes only the most
+ * recent value from each burst of emissions.</span>
+ *
+ * ![](debounceTime.png)
+ *
+ * `debounceTime` delays values emitted by the source Observable, but drops
+ * previous pending delayed emissions if a new value arrives on the source
+ * Observable. This operator keeps track of the most recent value from the
+ * source Observable, and emits that only when `dueTime` enough time has passed
+ * without any other value appearing on the source Observable. If a new value
+ * appears before `dueTime` silence occurs, the previous value will be dropped
+ * and will not be emitted on the output Observable.
+ *
+ * This is a rate-limiting operator, because it is impossible for more than one
+ * value to be emitted in any time window of duration `dueTime`, but it is also
+ * a delay-like operator since output emissions do not occur at the same time as
+ * they did on the source Observable. Optionally takes a {@link SchedulerLike} for
+ * managing timers.
+ *
+ * ## Example
+ * Emit the most recent click after a burst of clicks
+ * ```ts
+ * import { fromEvent } from 'rxjs';
+ * import { debounceTime } from 'rxjs/operators';
+ *
+ * const clicks = fromEvent(document, 'click');
+ * const result = clicks.pipe(debounceTime(1000));
+ * result.subscribe(x => console.log(x));
+ * ```
+ *
+ * @see {@link auditTime}
+ * @see {@link debounce}
+ * @see {@link delay}
+ * @see {@link sampleTime}
+ * @see {@link throttleTime}
+ *
+ * @param {number} dueTime The timeout duration in milliseconds (or the time
+ * unit determined internally by the optional `scheduler`) for the window of
+ * time required to wait for emission silence before emitting the most recent
+ * source value.
+ * @param {SchedulerLike} [scheduler=async] The {@link SchedulerLike} to use for
+ * managing the timers that handle the timeout for each value.
+ * @return {Observable} An Observable that delays the emissions of the source
+ * Observable by the specified `dueTime`, and may drop some values if they occur
+ * too frequently.
+ * @method debounceTime
+ * @owner Observable
+ */
+export function debounceTime<T>(dueTime: number, scheduler: SchedulerLike = async): MonoTypeOperatorFunction<T> {
+  return (source: Observable<T>) => source.lift(new DebounceTimeOperator(dueTime, scheduler));
+}
+
+class DebounceTimeOperator<T> implements Operator<T, T> {
+  constructor(private dueTime: number, private scheduler: SchedulerLike) {
+  }
+
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new DebounceTimeSubscriber(subscriber, this.dueTime, this.scheduler));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class DebounceTimeSubscriber<T> extends Subscriber<T> {
+  private debouncedSubscription: Subscription = null;
+  private lastValue: T = null;
+  private hasValue: boolean = false;
+
+  constructor(destination: Subscriber<T>,
+              private dueTime: number,
+              private scheduler: SchedulerLike) {
+    super(destination);
+  }
+
+  protected _next(value: T) {
+    this.clearDebounce();
+    this.lastValue = value;
+    this.hasValue = true;
+    this.add(this.debouncedSubscription = this.scheduler.schedule(dispatchNext, this.dueTime, this));
+  }
+
+  protected _complete() {
+    this.debouncedNext();
+    this.destination.complete();
+  }
+
+  debouncedNext(): void {
+    this.clearDebounce();
+
+    if (this.hasValue) {
+      const { lastValue } = this;
+      // This must be done *before* passing the value
+      // along to the destination because it's possible for
+      // the value to synchronously re-enter this operator
+      // recursively when scheduled with things like
+      // VirtualScheduler/TestScheduler.
+      this.lastValue = null;
+      this.hasValue = false;
+      this.destination.next(lastValue);
+    }
+  }
+
+  private clearDebounce(): void {
+    const debouncedSubscription = this.debouncedSubscription;
+
+    if (debouncedSubscription !== null) {
+      this.remove(debouncedSubscription);
+      debouncedSubscription.unsubscribe();
+      this.debouncedSubscription = null;
+    }
+  }
+}
+
+function dispatchNext(subscriber: DebounceTimeSubscriber<any>) {
+  subscriber.debouncedNext();
+}