/// <summary>Processes content from the specified page number using the specified listener.</summary>
/// <remarks>
/// Processes content from the specified page number using the specified listener.
/// Also allows registration of custom ContentOperators
/// </remarks>
///
/// <param name="pageNumber">the page number to process</param>
/// <param name="renderListener">the listener that will receive render callbacks</param>
/// <param name="additionalContentOperators">an optional map of custom ContentOperators for rendering instructions
/// </param>
/// <returns>the provided renderListener</returns>
public virtual E ProcessContent <E>(int pageNumber, E renderListener, IDictionary <String, IContentOperator>
additionalContentOperators)
where E : IEventListener
{
PdfCanvasProcessor processor = new PdfCanvasProcessor(renderListener);
foreach (KeyValuePair <String, IContentOperator> entry in additionalContentOperators)
{
processor.RegisterContentOperator(entry.Key, entry.Value);
}
processor.ProcessPageContent(pdfDocument.GetPage(pageNumber));
return(renderListener);
}