Fix EsLint Brackets (error markup 'const').

2018-11-22 16:41:46 +01:00
parent 75add7333d
commit d20e8a9d10
6005 changed files with 337788 additions and 0 deletions
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+import { async } from '../scheduler/async';
+import { isDate } from '../util/isDate';
+import { Operator } from '../Operator';
+import { Subscriber } from '../Subscriber';
+import { Subscription } from '../Subscription';
+import { Notification } from '../Notification';
+import { Observable } from '../Observable';
+import { MonoTypeOperatorFunction, PartialObserver, SchedulerAction, SchedulerLike, TeardownLogic } from '../types';
+
+/**
+ * Delays the emission of items from the source Observable by a given timeout or
+ * until a given Date.
+ *
+ * <span class="informal">Time shifts each item by some specified amount of
+ * milliseconds.</span>
+ *
+ * ![](delay.png)
+ *
+ * If the delay argument is a Number, this operator time shifts the source
+ * Observable by that amount of time expressed in milliseconds. The relative
+ * time intervals between the values are preserved.
+ *
+ * If the delay argument is a Date, this operator time shifts the start of the
+ * Observable execution until the given date occurs.
+ *
+ * ## Examples
+ * Delay each click by one second
+ * ```javascript
+ * const clicks = fromEvent(document, 'click');
+ * const delayedClicks = clicks.pipe(delay(1000)); // each click emitted after 1 second
+ * delayedClicks.subscribe(x => console.log(x));
+ * ```
+ *
+ * Delay all clicks until a future date happens
+ * ```javascript
+ * const clicks = fromEvent(document, 'click');
+ * const date = new Date('March 15, 2050 12:00:00'); // in the future
+ * const delayedClicks = clicks.pipe(delay(date)); // click emitted only after that date
+ * delayedClicks.subscribe(x => console.log(x));
+ * ```
+ *
+ * @see {@link debounceTime}
+ * @see {@link delayWhen}
+ *
+ * @param {number|Date} delay The delay duration in milliseconds (a `number`) or
+ * a `Date` until which the emission of the source items is delayed.
+ * @param {SchedulerLike} [scheduler=async] The {@link SchedulerLike} to use for
+ * managing the timers that handle the time-shift for each item.
+ * @return {Observable} An Observable that delays the emissions of the source
+ * Observable by the specified timeout or Date.
+ * @method delay
+ * @owner Observable
+ */
+export function delay<T>(delay: number|Date,
+                         scheduler: SchedulerLike = async): MonoTypeOperatorFunction<T> {
+  const absoluteDelay = isDate(delay);
+  const delayFor = absoluteDelay ? (+delay - scheduler.now()) : Math.abs(<number>delay);
+  return (source: Observable<T>) => source.lift(new DelayOperator(delayFor, scheduler));
+}
+
+class DelayOperator<T> implements Operator<T, T> {
+  constructor(private delay: number,
+              private scheduler: SchedulerLike) {
+  }
+
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new DelaySubscriber(subscriber, this.delay, this.scheduler));
+  }
+}
+
+interface DelayState<T> {
+  source: DelaySubscriber<T>;
+  destination: PartialObserver<T>;
+  scheduler: SchedulerLike;
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class DelaySubscriber<T> extends Subscriber<T> {
+  private queue: Array<DelayMessage<T>> = [];
+  private active: boolean = false;
+  private errored: boolean = false;
+
+  private static dispatch<T>(this: SchedulerAction<DelayState<T>>, state: DelayState<T>): void {
+    const source = state.source;
+    const queue = source.queue;
+    const scheduler = state.scheduler;
+    const destination = state.destination;
+
+    while (queue.length > 0 && (queue[0].time - scheduler.now()) <= 0) {
+      queue.shift().notification.observe(destination);
+    }
+
+    if (queue.length > 0) {
+      const delay = Math.max(0, queue[0].time - scheduler.now());
+      this.schedule(state, delay);
+    } else {
+      this.unsubscribe();
+      source.active = false;
+    }
+  }
+
+  constructor(destination: Subscriber<T>,
+              private delay: number,
+              private scheduler: SchedulerLike) {
+    super(destination);
+  }
+
+  private _schedule(scheduler: SchedulerLike): void {
+    this.active = true;
+    const destination = this.destination as Subscription;
+    destination.add(scheduler.schedule<DelayState<T>>(DelaySubscriber.dispatch, this.delay, {
+      source: this, destination: this.destination, scheduler: scheduler
+    }));
+  }
+
+  private scheduleNotification(notification: Notification<T>): void {
+    if (this.errored === true) {
+      return;
+    }
+
+    const scheduler = this.scheduler;
+    const message = new DelayMessage(scheduler.now() + this.delay, notification);
+    this.queue.push(message);
+
+    if (this.active === false) {
+      this._schedule(scheduler);
+    }
+  }
+
+  protected _next(value: T) {
+    this.scheduleNotification(Notification.createNext(value));
+  }
+
+  protected _error(err: any) {
+    this.errored = true;
+    this.queue = [];
+    this.destination.error(err);
+    this.unsubscribe();
+  }
+
+  protected _complete() {
+    this.scheduleNotification(Notification.createComplete());
+    this.unsubscribe();
+  }
+}
+
+class DelayMessage<T> {
+  constructor(public readonly time: number,
+              public readonly notification: Notification<T>) {
+  }
+}