// 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;
using Microsoft.VisualStudio.Text;
 
namespace Microsoft.CodeAnalysis.Text.Shared.Extensions;
 
internal static class TextSpanExtensions
{
    /// <summary>
    /// Convert a <see cref="TextSpan"/> instance to a <see cref="TextSpan"/>.
    /// </summary>
    public static Span ToSpan(this TextSpan textSpan)
        => new Span(textSpan.Start, textSpan.Length);
 
    /// <summary>
    /// Add an offset to a <see cref="TextSpan"/>.
    /// </summary>
    public static TextSpan MoveTo(this TextSpan textSpan, int offset)
        => new TextSpan(textSpan.Start + offset, textSpan.Length);
 
    /// <summary>
    /// Convert a <see cref="TextSpan"/> to a <see cref="SnapshotSpan"/> on the given <see cref="ITextSnapshot"/> instance
    /// </summary>
    public static SnapshotSpan ToSnapshotSpan(this TextSpan textSpan, ITextSnapshot snapshot)
    {
        Debug.Assert(snapshot != null);
        var span = textSpan.ToSpan();
        return new SnapshotSpan(snapshot, span);
    }
}