// 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.
 
#nullable disable
 
using Microsoft.CodeAnalysis.Host;
 
namespace Microsoft.CodeAnalysis.Editor.Undo
{
    /// <summary>
    /// This provides a way to do global undo. but semantic of the global undo is defined by the workspace host.
    /// </summary>
    internal interface IGlobalUndoService : IWorkspaceService
    {
        /// <summary>
        /// Queries whether a global transaction is currently active.
        /// </summary>
        bool IsGlobalTransactionOpen(Workspace workspace);
 
        /// <summary>
        /// query method that can answer whether global undo is supported by the workspace
        /// </summary>
        bool CanUndo(Workspace workspace);
 
        /// <summary>
        /// open global undo transaction for the workspace
        /// </summary>
        IWorkspaceGlobalUndoTransaction OpenGlobalUndoTransaction(Workspace workspace, string description);
    }
}