// 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.Text;
 
namespace Microsoft.CodeAnalysis.Formatting.Rules;
 
/// <summary>
/// preserve relative spaces between anchor token and first tokens on lines within the given text span 
/// as long as it doesn't have explicit line operations associated with them
/// </summary>
internal sealed class AnchorIndentationOperation
{
    internal AnchorIndentationOperation(SyntaxToken anchorToken, SyntaxToken endToken, TextSpan textSpan)
    {
        Contract.ThrowIfTrue(anchorToken.RawKind == 0);
        Contract.ThrowIfTrue(textSpan.Start < 0 || textSpan.Length < 0);
 
        Contract.ThrowIfTrue(endToken.RawKind == 0);
 
        this.AnchorToken = anchorToken;
        this.TextSpan = textSpan;
 
        this.EndToken = endToken;
    }
 
    public SyntaxToken AnchorToken { get; }
    public TextSpan TextSpan { get; }
 
    public SyntaxToken StartToken => AnchorToken;
    public SyntaxToken EndToken { get; }
}