OpenBoard/src/pdf-merger/MediaBoxElementHandler.h

/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#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