// TODO (DEVSIX-3596) Add support of 'lh' 'ch' units and viewport-relative units
        private float ParseFontRelativeOrAbsoluteLengthOnMarker(String length)
        {
            float value = 0f;

            if (CssUtils.IsMetricValue(length) || CssUtils.IsNumericValue(length))
            {
                value = CssUtils.ParseAbsoluteLength(length);
            }
            else
            {
                if (CssUtils.IsFontRelativeValue(length))
                {
                    // Defaut font-size is medium
                    value = CssUtils.ParseRelativeValue(length, CssUtils.ParseAbsoluteFontSize(CommonCssConstants.MEDIUM));
                    // Different browsers process font-relative units for markers differently.
                    // We do it according to the css specification.
                    if (CssUtils.IsRemValue(length))
                    {
                        ISvgNodeRenderer rootElement = GetSvgRootElement(GetParent());
                        if (rootElement != null && rootElement.GetAttribute(CommonCssConstants.FONT_SIZE) != null)
                        {
                            value = CssUtils.ParseRelativeValue(length, CssUtils.ParseAbsoluteFontSize(rootElement.GetAttribute(CommonCssConstants
                                                                                                                                .FONT_SIZE)));
                        }
                    }
                    else
                    {
                        if (CssUtils.IsEmValue(length))
                        {
                            ISvgNodeRenderer parentElement = this.GetParent();
                            if (parentElement != null && parentElement.GetAttribute(CommonCssConstants.FONT_SIZE) != null)
                            {
                                value = CssUtils.ParseRelativeValue(length, CssUtils.ParseAbsoluteFontSize(parentElement.GetAttribute(CommonCssConstants
                                                                                                                                      .FONT_SIZE)));
                            }
                        }
                        else
                        {
                            if (CssUtils.IsExValue(length))
                            {
                                if (this.GetAttribute(CommonCssConstants.FONT_SIZE) != null)
                                {
                                    value = CssUtils.ParseRelativeValue(length, CssUtils.ParseAbsoluteFontSize(this.GetAttribute(CommonCssConstants
                                                                                                                                 .FONT_SIZE)));
                                }
                            }
                        }
                    }
                }
            }
            return(value);
        }