/// <summary>
/// Enhanced measure string function for PdfSharp Xgraphics
/// wich take to account lineBreaks to calculate the real string
/// height in a rectagle
/// </summary>
/// <param name="gfx"></param>
/// <param name="text">Text to measure</param>
/// <param name="maxWitdh">Maximum allowed width</param>
/// <returns></returns>
public static XSize MeasureStringExact(this XGraphics gfx, string content, XFont font, double maxWidth)
{
//Split by hard line break
var contents = content.Split(new List <string> {
"\n", "\r\n"
}.ToArray(), StringSplitOptions.None);
Func <string, XFont, XSize> measPdfSharp = (ct, ft) =>
{
var size = gfx.MeasureString(ct, ft);
var lineSpace = font.GetHeight();
var cellSpace = font.FontFamily.GetLineSpacing(ft.Style);
var cellLeading = cellSpace - font.FontFamily.GetCellAscent(ft.Style) - font.FontFamily.GetCellDescent(ft.Style);
var leading = lineSpace * cellLeading / cellSpace;
size.Height += leading;
if (size.Width > maxWidth)
{
var nbLine = gfx.GetSplittedLineCount(ct, ft, maxWidth);
size.Height = (nbLine * lineSpace) + leading;
size.Width = maxWidth;
}
return(size);
};
var sizes = contents.Select(c => measPdfSharp(c, font));
return(new XSize(sizes.Max(w => w.Width), sizes.Sum(h => h.Height)));
}