public Size Measure(string text, double fontSize, Typeface typeface, double maxWidth)
{
if (htmlElement == null)
{
htmlElement = Document.CreateElement("div");
style = new HtmlStyleDictionary(htmlElement);
Document.Body.AppendChild(htmlElement);
}
style.SetValue("position", "absolute");
style.SetValue("visibility", "hidden");
style.SetFontSize(fontSize, converter);
style.SetFontFamily(typeface.FontFamily, converter);
style.SetFontStretch(typeface.Stretch, converter);
style.SetFontStyle(typeface.Style, converter);
style.SetFontWeight(typeface.Weight, converter);
if (maxWidth.IsNaN() || !Double.IsFinite(maxWidth))
{
style.SetTextWrapping(TextWrapping.NoWrap, converter);
style.ClearValue("max-width");
}
else
{
style.SetTextWrapping(TextWrapping.Wrap, converter);
style.SetValue("max-width", converter.ToPixelString(maxWidth));
}
style.Apply();
htmlElement.InnerHTML = converter.ToHtmlContentString(text.DefaultIfNullOrEmpty("A"));
return(new Size(text.IsNullOrEmpty() ? 0 : htmlElement.OffsetWidth + 2, htmlElement.OffsetHeight));
}