/**
* Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.
* <br>
* If you register a handler, it is a very good idea to pass the call on to the existing registered handler (returned by this call), otherwise you
* may inadvertently change the internal behavior of the processor.
* @param xobjectSubType the XObject subtype this handler will process, or PdfName.DEFAULT for a catch-all handler
* @param handler the handler that will receive notification when the Do oper for the specified subtype is encountered
* @return the existing registered handler, if any
* @since 5.0.1
*/
public IXObjectDoHandler RegisterXObjectDoHandler(PdfName xobjectSubType, IXObjectDoHandler handler)
{
IXObjectDoHandler old;
xobjectDoHandlers.TryGetValue(xobjectSubType, out old);
xobjectDoHandlers[xobjectSubType] = handler;
return(old);
}
/**
* Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.
* <br>
* If you register a handler, it is a very good idea to pass the call on to the existing registered handler (returned by this call), otherwise you
* may inadvertently change the internal behavior of the processor.
* @param xobjectSubType the XObject subtype this handler will process, or PdfName.DEFAULT for a catch-all handler
* @param handler the handler that will receive notification when the Do oper for the specified subtype is encountered
* @return the existing registered handler, if any
* @since 5.0.1
*/
public IXObjectDoHandler RegisterXObjectDoHandler(PdfName xobjectSubType, IXObjectDoHandler handler){
IXObjectDoHandler old;
xobjectDoHandlers.TryGetValue(xobjectSubType, out old);
xobjectDoHandlers[xobjectSubType] = handler;
return old;
}
public override IXObjectDoHandler RegisterXObjectDoHandler(PdfName xobjectSubType, IXObjectDoHandler handler)
{
var wrapper = new XObjectDoHandlerWrapper {
OriginalHandler = handler
};
var former = base.RegisterXObjectDoHandler(xobjectSubType, wrapper);
return(former is XObjectDoHandlerWrapper formerWrapper ? formerWrapper.OriginalHandler : former);
}
