using System.Reactive.Concurrency; namespace System.Reactive.Linq.ObservableImpl { internal sealed class TimeInterval<TSource> : Producer<System.Reactive.TimeInterval<TSource>, TimeInterval<TSource>._> { internal sealed class _ : Sink<TSource, System.Reactive.TimeInterval<TSource>> { private IStopwatch _watch; private TimeSpan _last; public _(IObserver<System.Reactive.TimeInterval<TSource>> observer) : base(observer) { } public void Run(TimeInterval<TSource> parent) { _watch = parent._scheduler.StartStopwatch(); _last = TimeSpan.Zero; SetUpstream(parent._source.Subscribe(this)); } public override void OnNext(TSource value) { TimeSpan elapsed = _watch.Elapsed; TimeSpan interval = elapsed.Subtract(_last); _last = elapsed; ForwardOnNext(new System.Reactive.TimeInterval<TSource>(value, interval)); } } private readonly IObservable<TSource> _source; private readonly IScheduler _scheduler; public TimeInterval(IObservable<TSource> source, IScheduler scheduler) { _source = source; _scheduler = scheduler; } protected override _ CreateSink(IObserver<System.Reactive.TimeInterval<TSource>> observer) { return new _(observer); } protected override void Run(_ sink) { sink.Run(this); } } }