// 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.ComponentModel.Composition;
using System.Diagnostics.CodeAnalysis;
using Microsoft.CodeAnalysis.Editor.Shared.Extensions;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.Shared.TestHooks;
using Microsoft.VisualStudio.Language.Intellisense;
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Utilities;
 
namespace Microsoft.CodeAnalysis.Editor.NavigableSymbols;
 
[Export(typeof(INavigableSymbolSourceProvider))]
[Name(nameof(NavigableSymbolService))]
[ContentType(ContentTypeNames.RoslynContentType)]
internal sealed partial class NavigableSymbolService : INavigableSymbolSourceProvider
{
    private static readonly object s_key = new();
 
    private readonly IUIThreadOperationExecutor _uiThreadOperationExecutor;
    private readonly IThreadingContext _threadingContext;
    private readonly IAsynchronousOperationListener _listener;
 
    [ImportingConstructor]
    [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
    public NavigableSymbolService(
        IUIThreadOperationExecutor uiThreadOperationExecutor,
        IThreadingContext threadingContext,
        IAsynchronousOperationListenerProvider listenerProvider)
    {
        _uiThreadOperationExecutor = uiThreadOperationExecutor;
        _threadingContext = threadingContext;
        _listener = listenerProvider.GetListener(FeatureAttribute.NavigableSymbols);
    }
 
    public INavigableSymbolSource TryCreateNavigableSymbolSource(ITextView textView, ITextBuffer buffer)
        => textView.GetOrCreatePerSubjectBufferProperty(buffer, s_key, (view, _) => new NavigableSymbolSource(this, view));
}