// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using Microsoft.CodeAnalysis.Editor.Tagging;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Editor.Shared.Tagging
{
    internal partial class TaggerEventSources
    {
        private class CompositionEventSource : ITaggerEventSource
        {
            private readonly ITaggerEventSource[] _providers;
 
            public CompositionEventSource(ITaggerEventSource[] providers)
            {
                Contract.ThrowIfNull(providers);
 
                _providers = providers;
            }
 
            public void Connect()
                => _providers.Do(p => p.Connect());
 
            public void Disconnect()
                => _providers.Do(p => p.Disconnect());
 
            public void Pause()
                => _providers.Do(p => p.Pause());
 
            public void Resume()
                => _providers.Do(p => p.Resume());
 
            public event EventHandler<TaggerEventArgs> Changed
            {
                add => _providers.Do(p => p.Changed += value);
                remove => _providers.Do(p => p.Changed -= value);
            }
        }
    }
}