inputfilterScope.hpp

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#ifndef _Wolframe_FILTER_INPUTFILTER_SCOPE_HPP_INCLUDED
#define _Wolframe_FILTER_INPUTFILTER_SCOPE_HPP_INCLUDED
#include "filter/inputfilter.hpp"
#include <stdexcept>

namespace _Wolframe {
namespace langbind {

class InputFilterScope :public InputFilter
{
public:
        InputFilterScope()
                :InputFilter("scope")
                ,m_taglevel(0){}

        explicit InputFilterScope( const InputFilterR& i)
                :InputFilter(i->name())
                ,m_inputfilter(i)
                ,m_taglevel(1)
        {
                InputFilterScope* prev = dynamic_cast<InputFilterScope*>(i.get());
                if (prev) m_inputfilter = prev->inputfilter();
        }

        InputFilterScope( const InputFilterScope& o)
                :InputFilter(o)
                ,m_inputfilter(o.m_inputfilter)
                ,m_taglevel(o.m_taglevel){}

        virtual ~InputFilterScope(){}

        virtual InputFilter* copy() const
        {
                return new InputFilterScope(*this);
        }

        virtual void putInput( const void*, std::size_t, bool)
        {
                throw std::logic_error( "put input to an input filter scope");
        }

        virtual const types::DocMetaData* getMetaData()
        {
                return m_inputfilter->getMetaData();
        }

        virtual bool getNext( ElementType& type, const void*& element, std::size_t& elementsize);

        const InputFilterR& inputfilter()               {return m_inputfilter;}

private:
        InputFilterR m_inputfilter;
        int m_taglevel;
};

}}//namespace
#endif