Alsing.SourceCode.SyntaxDocument.GetSegmentFromPos C# (CSharp) Метод

        public Span GetSegmentFromPos(TextPoint p)
        {
            Row xtr = this[p.Y];
            int CharNo = 0;

            if (xtr.Count == 0)
                return xtr.startSpan;

            Span prev = xtr.startSpan;
            foreach (Word w in xtr)
            {
                if (w.Text.Length + CharNo > p.X)
                {
                    if (CharNo == p.X)
                        return prev;
                    return w.Span;
                }
                CharNo += w.Text.Length;
                prev = w.Span;
            }

            return xtr.endSpan;
        }