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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if !NO_PERF
using System;
using System.Collections.Generic;
namespace System.Reactive.Linq.Observαble
{
class DoWhile<TSource> : Producer<TSource>, IConcatenatable<TSource>
{
private readonly IObservable<TSource> _source;
private readonly Func<bool> _condition;
public DoWhile(IObservable<TSource> source, Func<bool> condition)
{
_condition = condition;
_source = source;
}
protected override IDisposable Run(IObserver<TSource> observer, IDisposable cancel, Action<IDisposable> setSink)
{
var sink = new _(observer, cancel);
setSink(sink);
return sink.Run(GetSources());
}
public IEnumerable<IObservable<TSource>> GetSources()
{
yield return _source;
while (_condition())
yield return _source;
}
class _ : ConcatSink<TSource>
{
public _(IObserver<TSource> observer, IDisposable cancel)
: base(observer, cancel)
{
}
public override void OnNext(TSource value)
{
base._observer.OnNext(value);
}
public override void OnError(Exception error)
{
base._observer.OnError(error);
base.Dispose();
}
}
}
}
#endif
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