static CssLength SetLineHeight(this CssBox box, CssLength len) { //2014,2015, //from www.w3c.org/wiki/Css/Properties/line-height //line height in <percentage> : //The computed value if the property is percentage multiplied by the //element's computed font size. return(CssLength.MakePixelLength( CssValueParser.ConvertToPx(len, box.GetEmHeight(), box))); }