private static void CopyFontTable(FontTablePart oldFontTablePart, FontTablePart newFontTablePart)
{
var relevantElements = oldFontTablePart.GetXDocument().Descendants().Where(d => d.Name == W.embedRegular ||
d.Name == W.embedBold || d.Name == W.embedItalic || d.Name == W.embedBoldItalic).ToList();
foreach (XElement fontReference in relevantElements)
{
string relId = (string)fontReference.Attribute(R.id);
if (string.IsNullOrEmpty(relId))
continue;
try
{
OpenXmlPart tempPart = newFontTablePart.GetPartById(relId);
continue;
}
catch (ArgumentOutOfRangeException)
{
try
{
ExternalRelationship tempEr = newFontTablePart.GetExternalRelationship(relId);
continue;
}
catch (KeyNotFoundException)
{
}
}
FontPart oldPart = (FontPart)oldFontTablePart.GetPartById(relId);
FontPart newPart = newFontTablePart.AddFontPart(oldPart.ContentType);
var ResourceID = newFontTablePart.GetIdOfPart(newPart);
using (Stream oldFont = oldPart.GetStream(FileMode.Open, FileAccess.Read))
using (Stream newFont = newPart.GetStream(FileMode.Create, FileAccess.ReadWrite))
{
int byteCount;
byte[] buffer = new byte[65536];
while ((byteCount = oldFont.Read(buffer, 0, 65536)) != 0)
newFont.Write(buffer, 0, byteCount);
}
fontReference.Attribute(R.id).Value = ResourceID;
}
}
