File: Workspace\Host\DocumentService\Extensions.cs
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Project: src\src\Workspaces\Core\Portable\Microsoft.CodeAnalysis.Workspaces.csproj (Microsoft.CodeAnalysis.Workspaces)
// 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.Diagnostics.CodeAnalysis;
 
namespace Microsoft.CodeAnalysis.Host;
 
internal static class Extensions
{
    private const string RazorCSharpLspClientName = "RazorCSharp";
 
    public static bool CanApplyChange([NotNullWhen(returnValue: true)] this TextDocument? document)
        => document?.State.CanApplyChange() ?? false;
 
    public static bool CanApplyChange([NotNullWhen(returnValue: true)] this TextDocumentState? document)
        => document?.DocumentServiceProvider.GetService<IDocumentOperationService>()?.CanApplyChange ?? false;
 
    public static bool SupportsDiagnostics([NotNullWhen(returnValue: true)] this TextDocument? document)
        => document?.State.SupportsDiagnostics() ?? false;
 
    public static bool SupportsDiagnostics([NotNullWhen(returnValue: true)] this TextDocumentState? document)
        => document?.DocumentServiceProvider.GetService<IDocumentOperationService>()?.SupportDiagnostics ?? false;
 
    public static bool IsRazorDocument(this TextDocument document)
        => IsRazorDocument(document.State);
 
    public static bool IsRazorDocument(this TextDocumentState documentState)
        => documentState.DocumentServiceProvider.GetService<DocumentPropertiesService>()?.DiagnosticsLspClientName == RazorCSharpLspClientName;
}