// 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;
using Microsoft.CodeAnalysis.Formatting.Rules;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.Venus;
 
internal class ContainedDocumentPreserveFormattingRule : AbstractFormattingRule
{
    public static readonly AbstractFormattingRule Instance = new ContainedDocumentPreserveFormattingRule();
 
    private static readonly AdjustSpacesOperation s_preserveSpace = FormattingOperations.CreateAdjustSpacesOperation(0, AdjustSpacesOption.PreserveSpaces);
    private static readonly AdjustNewLinesOperation s_preserveLine = FormattingOperations.CreateAdjustNewLinesOperation(0, AdjustNewLinesOption.PreserveLines);
 
    public override AdjustSpacesOperation GetAdjustSpacesOperation(in SyntaxToken previousToken, in SyntaxToken currentToken, in NextGetAdjustSpacesOperation nextOperation)
    {
        var operation = base.GetAdjustSpacesOperation(in previousToken, in currentToken, in nextOperation);
        if (operation != null)
        {
            return s_preserveSpace;
        }
 
        return operation;
    }
 
    public override AdjustNewLinesOperation GetAdjustNewLinesOperation(in SyntaxToken previousToken, in SyntaxToken currentToken, in NextGetAdjustNewLinesOperation nextOperation)
    {
        var operation = base.GetAdjustNewLinesOperation(in previousToken, in currentToken, in nextOperation);
        if (operation != null)
        {
            return s_preserveLine;
        }
 
        return operation;
    }
}