// 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);
}