Upsilon/Upsilon/Text/TextSpan.cs

namespace Upsilon.Text
{
    public struct TextSpan
    {
        public int StartLine { get; }
        public int StartPosition { get; }
        public int EndLine { get; }
        public int EndPosition { get; }

        public TextSpan(int startLine, int startPosition, int endLine, int endPosition)
        {
            StartLine = startLine;
            StartPosition = startPosition;
            EndLine = endLine;
            EndPosition = endPosition;
        }

        public override string ToString()
        {
            return $"({StartLine}, {StartPosition}) - ({EndLine}, {EndPosition})";
        }

        public static TextSpan Between(TextSpan start, TextSpan end)
        {
            return new TextSpan(start.StartLine, start.StartPosition, end.EndLine, end.EndPosition);
        }

        public bool Contains(int linePosition, int characterPosition)
        {
            return StartLine         >= linePosition && EndLine <= linePosition && characterPosition >= StartPosition &&
                   characterPosition <= EndPosition;
        }
    }
}