Bloom.Publish.EpubMaker.ConvertStyleFromPxToPercent C# (CSharp) Méthode

        private static bool ConvertStyleFromPxToPercent(string stylename, double pageWidthMm, double multiplier, ref string imgStyle)
        {
            var match = new Regex("(.*" + stylename + ":\\s*)(\\d+)px(.*)").Match(imgStyle);
            if (!match.Success)
                return true;
            var widthPx = int.Parse(match.Groups[2].Value);
            var widthInch = widthPx/96.0; // in print a CSS px is exactly 1/96 inch
            const int marginBoxMarginMm = 40; // see basePage.less SetMarginBox.
            var marginBoxWidthInch = (pageWidthMm - marginBoxMarginMm)/mmPerInch;
            var parentBoxWidthInch = marginBoxWidthInch*multiplier; // parent box is smaller by net effect of parents with %width styles
            // 1/10 percent is close enough and more readable/testable than arbitrary precision; make a string with one decimal
            var newWidth = (Math.Round(widthInch/parentBoxWidthInch*1000)/10).ToString("F1");
            imgStyle = match.Groups[1] + newWidth  + "%" + match.Groups[3];
            return false;
        }