// 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.Formatting.Rules;
using Microsoft.CodeAnalysis.Shared.Collections;
using Microsoft.CodeAnalysis.Text;
 
namespace Microsoft.CodeAnalysis.Formatting
{
    internal partial class FormattingContext
    {
        /// <summary>
        /// data that will be used in an interval tree related to Anchor.
        /// </summary>
        private class AnchorData
        {
            private readonly AnchorIndentationOperation _operation;
 
            public AnchorData(AnchorIndentationOperation operation, SyntaxToken anchorToken, int originalColumn)
            {
                _operation = operation;
                this.AnchorToken = anchorToken;
                this.OriginalColumn = originalColumn;
            }
 
            public TextSpan TextSpan => _operation.TextSpan;
 
            public SyntaxToken StartToken => _operation.StartToken;
 
            public SyntaxToken EndToken => _operation.EndToken;
 
            public SyntaxToken AnchorToken { get; }
 
            public int OriginalColumn { get; }
        }
 
        private readonly struct FormattingContextIntervalIntrospector
            : IIntervalIntrospector<AnchorData>,
            IIntervalIntrospector<IndentationData>,
            IIntervalIntrospector<RelativeIndentationData>
        {
            int IIntervalIntrospector<AnchorData>.GetStart(AnchorData value)
                => value.TextSpan.Start;
 
            int IIntervalIntrospector<AnchorData>.GetLength(AnchorData value)
                => value.TextSpan.Length;
 
            int IIntervalIntrospector<IndentationData>.GetStart(IndentationData value)
                => value.TextSpan.Start;
 
            int IIntervalIntrospector<IndentationData>.GetLength(IndentationData value)
                => value.TextSpan.Length;
 
            int IIntervalIntrospector<RelativeIndentationData>.GetStart(RelativeIndentationData value)
                => value.InseparableRegionSpan.Start;
 
            int IIntervalIntrospector<RelativeIndentationData>.GetLength(RelativeIndentationData value)
                => value.InseparableRegionSpan.Length;
        }
    }
}