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OpenBoard/thirdparty/mera/pdf-merger/MediaBoxElementHandler.h

53 lines
1.6 KiB

#if !defined MediaBoxElementHandler_h
#define MediaBoxElementHandler_h
#include "AbstractBoxElementHandler.h"
#include "RemoveHimSelfHandler.h"
#include <memory>
namespace merge_lib
{
//class for processing MediaBox field of Page object
class MediaBoxElementHandler: public AbstractBoxElementHandler
{
public:
MediaBoxElementHandler(Object * page): AbstractBoxElementHandler(page)
{
_setHandlerName("/MediaBox");
}
virtual ~MediaBoxElementHandler()
{
}
private:
//replace MediaBox with BBox
virtual void _changeObjectContent(unsigned int startOfPageElement)
{
if(_wasCropBoxHandlerCalled())
{
PageElementHandler * tempNextHandler = _nextHandler;
_nextHandler = new RemoveHimselfHandler(_page, _handlerName);
_nextHandler->addNextHandler(tempNextHandler);
return;
}
_page->eraseContent(startOfPageElement, _handlerName.size());
static std::string bbox("/BBox");
static std::string matrix("/Matrix [ 1 0 0 1 0 0 ]\n");
_page->insertToContent(startOfPageElement, bbox);
_page->insertToContent(startOfPageElement, matrix);
}
void _pageElementNotFound()
{
if(_wasCropBoxHandlerCalled())
return;
_retrieveBoxFromParent();
}
bool _wasCropBoxHandlerCalled()
{
return (_page->getObjectContent().find("/BBox") != std::string::npos) ? true : false;
}
};
}
#endif