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

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/sampleTime.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/sampleTime.ts
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+import { Observable } from '../Observable';
+import { Operator } from '../Operator';
+import { Subscriber } from '../Subscriber';
+import { async } from '../scheduler/async';
+import { MonoTypeOperatorFunction, SchedulerAction, SchedulerLike, TeardownLogic } from '../types';
+
+/**
+ * Emits the most recently emitted value from the source Observable within
+ * periodic time intervals.
+ *
+ * <span class="informal">Samples the source Observable at periodic time
+ * intervals, emitting what it samples.</span>
+ *
+ * ![](sampleTime.png)
+ *
+ * `sampleTime` periodically looks at the source Observable and emits whichever
+ * value it has most recently emitted since the previous sampling, unless the
+ * source has not emitted anything since the previous sampling. The sampling
+ * happens periodically in time every `period` milliseconds (or the time unit
+ * defined by the optional `scheduler` argument). The sampling starts as soon as
+ * the output Observable is subscribed.
+ *
+ * ## Example
+ * Every second, emit the most recent click at most once
+ * ```ts
+ * import { fromEvent } from 'rxjs';
+ * import { sampleTime } from 'rxjs/operators';
+ *
+ * const clicks = fromEvent(document, 'click');
+ * const result = clicks.pipe(sampleTime(1000));
+ * result.subscribe(x => console.log(x));
+ * ```
+ *
+ * @see {@link auditTime}
+ * @see {@link debounceTime}
+ * @see {@link delay}
+ * @see {@link sample}
+ * @see {@link throttleTime}
+ *
+ * @param {number} period The sampling period expressed in milliseconds or the
+ * time unit determined internally by the optional `scheduler`.
+ * @param {SchedulerLike} [scheduler=async] The {@link SchedulerLike} to use for
+ * managing the timers that handle the sampling.
+ * @return {Observable<T>} An Observable that emits the results of sampling the
+ * values emitted by the source Observable at the specified time interval.
+ * @method sampleTime
+ * @owner Observable
+ */
+export function sampleTime<T>(period: number, scheduler: SchedulerLike = async): MonoTypeOperatorFunction<T> {
+  return (source: Observable<T>) => source.lift(new SampleTimeOperator(period, scheduler));
+}
+
+class SampleTimeOperator<T> implements Operator<T, T> {
+  constructor(private period: number,
+              private scheduler: SchedulerLike) {
+  }
+
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new SampleTimeSubscriber(subscriber, this.period, this.scheduler));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class SampleTimeSubscriber<T> extends Subscriber<T> {
+  lastValue: T;
+  hasValue: boolean = false;
+
+  constructor(destination: Subscriber<T>,
+              private period: number,
+              private scheduler: SchedulerLike) {
+    super(destination);
+    this.add(scheduler.schedule(dispatchNotification, period, { subscriber: this, period }));
+  }
+
+  protected _next(value: T) {
+    this.lastValue = value;
+    this.hasValue = true;
+  }
+
+  notifyNext() {
+    if (this.hasValue) {
+      this.hasValue = false;
+      this.destination.next(this.lastValue);
+    }
+  }
+}
+
+function dispatchNotification<T>(this: SchedulerAction<any>, state: any) {
+  let { subscriber, period } = state;
+  subscriber.notifyNext();
+  this.schedule(state, period);
+}