tostringfilter.hpp

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#ifndef _Wolframe_FILTER_TOSTRING_FILTER_INTERFACE_HPP_INCLUDED
#define _Wolframe_FILTER_TOSTRING_FILTER_INTERFACE_HPP_INCLUDED
#include "filter/typedfilter.hpp"
#include <string>

namespace _Wolframe {
namespace langbind {

class ToStringFilter :public TypedOutputFilter
{
public:
        explicit ToStringFilter( const std::string indentstr_="")
                :TypedOutputFilter("tostring")
                ,m_contentpos(0)
                ,m_lasttype(FilterBase::OpenTag)
                ,m_indentstr(indentstr_)
                ,m_taglevel(0){}

        ToStringFilter( const ToStringFilter& o)
                :TypedOutputFilter(o)
                ,m_content(o.m_content)
                ,m_contentpos(o.m_contentpos)
                ,m_lasttype(o.m_lasttype)
                ,m_indent(o.m_indent)
                ,m_indentstr(o.m_indentstr)
                ,m_taglevel(o.m_taglevel){}
        virtual ~ToStringFilter(){}

        virtual TypedOutputFilter* copy() const         {return new ToStringFilter(*this);}

        virtual bool print( ElementType type, const types::VariantConst& element);

        virtual void getOutput( const void*& buf, std::size_t& bufsize)
        {
                buf = (const void*)(m_content.c_str() + m_contentpos);
                bufsize = m_content.size() - m_contentpos;
                m_contentpos = m_content.size();
        }

        const std::string& content() const              {return m_content;}

private:
        std::string m_content;                          
        std::size_t m_contentpos;                       
        FilterBase::ElementType m_lasttype;             
        std::string m_indent;                           
        std::string m_indentstr;                        
        int m_taglevel;                                 
};

}}//namespace
#endif