iTextSharp.text.pdf.ColumnText.FitText C# (CSharp) Метод

    public static float FitText(Font font, String text, Rectangle rect, float maxFontSize, int runDirection) {
        ColumnText ct = null;
        int status = 0;
        if (maxFontSize <= 0) {
            int cr = 0;
            int lf = 0;
            char[] t = text.ToCharArray();
            for (int k = 0; k < t.Length; ++k) {
                if (t[k] == '\n')
                    ++lf;
                else if (t[k] == '\r')
                    ++cr;
            }
            int minLines = Math.Max(cr, lf) + 1;
            maxFontSize = Math.Abs(rect.Height) / minLines - 0.001f;
        }
        font.Size = maxFontSize;
        Phrase ph = new Phrase(text, font);
        ct = new ColumnText(null);
        ct.SetSimpleColumn(ph, rect.Left, rect.Bottom, rect.Right, rect.Top, maxFontSize, Element.ALIGN_LEFT);
        ct.RunDirection = runDirection;
        status = ct.Go(true);
        if ((status & NO_MORE_TEXT) != 0)
            return maxFontSize;
        float precision = 0.1f;
        float min = 0;
        float max = maxFontSize;
        float size = maxFontSize;
        for (int k = 0; k < 50; ++k) { //just in case it doesn't converge
            size = (min + max) / 2;
            ct = new ColumnText(null);
            font.Size = size;
            ct.SetSimpleColumn(new Phrase(text, font), rect.Left, rect.Bottom, rect.Right, rect.Top, size, Element.ALIGN_LEFT);
            ct.RunDirection = runDirection;
            status = ct.Go(true);
            if ((status & NO_MORE_TEXT) != 0) {
                if (max - min < size * precision)
                    return size;
                min = size;
            }
            else
                max = size;
        }
        return size;
	}