private static PdfDictionary ParseTrailer(ISeekableTokenScanner scanner, bool isLenientParsing)
{
if (scanner.CurrentToken is OperatorToken trailerToken && trailerToken.Data == "trailer")
{
if (!scanner.TryReadToken(out DictionaryToken trailerDictionary))
{
throw new PdfDocumentFormatException($"Expected to find a dictionary in the trailer but instead found: {scanner.CurrentToken}.");
}
return(PdfDictionary.FromDictionaryToken(trailerDictionary));
}
if (isLenientParsing)
{
var foundTrailer = false;
while (scanner.MoveNext())
{
if (scanner.CurrentToken is OperatorToken op && op.Data == "trailer")
{
foundTrailer = true;
break;
}
}
if (foundTrailer && scanner.TryReadToken(out DictionaryToken trailerDictionary))
{
return(PdfDictionary.FromDictionaryToken(trailerDictionary));
}
}
throw new PdfDocumentFormatException("No trailer dictionary was present.");
}