// 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 Microsoft.CodeAnalysis.Editor.Shared.Tagging;
using Microsoft.VisualStudio.Text;
 
namespace Microsoft.CodeAnalysis.EditAndContinue;
 
internal partial class ActiveStatementTaggerProvider
{
    private sealed class EventSource(ITextBuffer subjectBuffer) : AbstractWorkspaceTrackingTaggerEventSource(subjectBuffer)
    {
        protected override void ConnectToWorkspace(Workspace workspace)
        {
            var trackingService = workspace.Services.GetService<IActiveStatementTrackingService>();
            if (trackingService != null)
            {
                trackingService.TrackingChanged += RaiseChanged;
                RaiseChanged();
            }
        }
 
        protected override void DisconnectFromWorkspace(Workspace workspace)
        {
            var trackingService = workspace.Services.GetService<IActiveStatementTrackingService>();
            if (trackingService != null)
            {
                trackingService.TrackingChanged -= RaiseChanged;
                RaiseChanged();
            }
        }
    }
}