// 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.Shared.Extensions;
using Microsoft.CodeAnalysis.Text;
using VsTextSpan = Microsoft.VisualStudio.TextManager.Interop.TextSpan;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.Extensions;
 
internal static class SourceTextExtensions
{
    public static VsTextSpan GetVsTextSpanForSpan(this SourceText text, TextSpan textSpan)
    {
        text.GetLinesAndOffsets(textSpan, out var startLine, out var startOffset, out var endLine, out var endOffset);
 
        return new VsTextSpan()
        {
            iStartLine = startLine,
            iStartIndex = startOffset,
            iEndLine = endLine,
            iEndIndex = endOffset
        };
    }
 
#pragma warning disable IDE0060 // Remove unused parameter - 'text' is used for API consistency with other extension methods in this file.
    public static VsTextSpan GetVsTextSpanForLineOffset(this SourceText text, int lineNumber, int offset)
#pragma warning restore IDE0060 // Remove unused parameter
    {
        return new VsTextSpan
        {
            iStartLine = lineNumber,
            iStartIndex = offset,
            iEndLine = lineNumber,
            iEndIndex = offset
        };
    }
 
    public static VsTextSpan GetVsTextSpanForPosition(this SourceText text, int position, int virtualSpace)
    {
        text.GetLineAndOffset(position, out var lineNumber, out var offset);
 
        offset += virtualSpace;
 
        return text.GetVsTextSpanForLineOffset(lineNumber, offset);
    }
}