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

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/observeOn.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/observeOn.ts
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+import { Observable } from '../Observable';
+import { Operator } from '../Operator';
+import { Subscriber } from '../Subscriber';
+import { Subscription } from '../Subscription';
+import { Notification } from '../Notification';
+import { MonoTypeOperatorFunction, PartialObserver, SchedulerAction, SchedulerLike, TeardownLogic } from '../types';
+
+/**
+ *
+ * Re-emits all notifications from source Observable with specified scheduler.
+ *
+ * <span class="informal">Ensure a specific scheduler is used, from outside of an Observable.</span>
+ *
+ * `observeOn` is an operator that accepts a scheduler as a first parameter, which will be used to reschedule
+ * notifications emitted by the source Observable. It might be useful, if you do not have control over
+ * internal scheduler of a given Observable, but want to control when its values are emitted nevertheless.
+ *
+ * Returned Observable emits the same notifications (nexted values, complete and error events) as the source Observable,
+ * but rescheduled with provided scheduler. Note that this doesn't mean that source Observables internal
+ * scheduler will be replaced in any way. Original scheduler still will be used, but when the source Observable emits
+ * notification, it will be immediately scheduled again - this time with scheduler passed to `observeOn`.
+ * An anti-pattern would be calling `observeOn` on Observable that emits lots of values synchronously, to split
+ * that emissions into asynchronous chunks. For this to happen, scheduler would have to be passed into the source
+ * Observable directly (usually into the operator that creates it). `observeOn` simply delays notifications a
+ * little bit more, to ensure that they are emitted at expected moments.
+ *
+ * As a matter of fact, `observeOn` accepts second parameter, which specifies in milliseconds with what delay notifications
+ * will be emitted. The main difference between {@link delay} operator and `observeOn` is that `observeOn`
+ * will delay all notifications - including error notifications - while `delay` will pass through error
+ * from source Observable immediately when it is emitted. In general it is highly recommended to use `delay` operator
+ * for any kind of delaying of values in the stream, while using `observeOn` to specify which scheduler should be used
+ * for notification emissions in general.
+ *
+ * ## Example
+ * Ensure values in subscribe are called just before browser repaint.
+ * ```ts
+ * import { interval } from 'rxjs';
+ * import { observeOn } from 'rxjs/operators';
+ *
+ * const intervals = interval(10);                // Intervals are scheduled
+ *                                                // with async scheduler by default...
+ * intervals.pipe(
+ *   observeOn(animationFrameScheduler),          // ...but we will observe on animationFrame
+ * )                                              // scheduler to ensure smooth animation.
+ * .subscribe(val => {
+ *   someDiv.style.height = val + 'px';
+ * });
+ * ```
+ *
+ * @see {@link delay}
+ *
+ * @param {SchedulerLike} scheduler Scheduler that will be used to reschedule notifications from source Observable.
+ * @param {number} [delay] Number of milliseconds that states with what delay every notification should be rescheduled.
+ * @return {Observable<T>} Observable that emits the same notifications as the source Observable,
+ * but with provided scheduler.
+ *
+ * @method observeOn
+ * @owner Observable
+ */
+export function observeOn<T>(scheduler: SchedulerLike, delay: number = 0): MonoTypeOperatorFunction<T> {
+  return function observeOnOperatorFunction(source: Observable<T>): Observable<T> {
+    return source.lift(new ObserveOnOperator(scheduler, delay));
+  };
+}
+
+export class ObserveOnOperator<T> implements Operator<T, T> {
+  constructor(private scheduler: SchedulerLike, private delay: number = 0) {
+  }
+
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new ObserveOnSubscriber(subscriber, this.scheduler, this.delay));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class ObserveOnSubscriber<T> extends Subscriber<T> {
+  /** @nocollapse */
+  static dispatch(this: SchedulerAction<ObserveOnMessage>, arg: ObserveOnMessage) {
+    const { notification, destination } = arg;
+    notification.observe(destination);
+    this.unsubscribe();
+  }
+
+  constructor(destination: Subscriber<T>,
+              private scheduler: SchedulerLike,
+              private delay: number = 0) {
+    super(destination);
+  }
+
+  private scheduleMessage(notification: Notification<any>): void {
+    const destination = this.destination as Subscription;
+    destination.add(this.scheduler.schedule(
+      ObserveOnSubscriber.dispatch,
+      this.delay,
+      new ObserveOnMessage(notification, this.destination)
+    ));
+  }
+
+  protected _next(value: T): void {
+    this.scheduleMessage(Notification.createNext(value));
+  }
+
+  protected _error(err: any): void {
+    this.scheduleMessage(Notification.createError(err));
+    this.unsubscribe();
+  }
+
+  protected _complete(): void {
+    this.scheduleMessage(Notification.createComplete());
+    this.unsubscribe();
+  }
+}
+
+export class ObserveOnMessage {
+  constructor(public notification: Notification<any>,
+              public destination: PartialObserver<any>) {
+  }
+}