CEGUIIteratorBase.h

/***********************************************************************
        filename:       CEGUIIteratorBase.h
        created:        26/7/2004
        author:         Paul D Turner
        
        purpose:        Defines interface for base iterator class
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
 *
 *   Permission is hereby granted, free of charge, to any person obtaining
 *   a copy of this software and associated documentation files (the
 *   "Software"), to deal in the Software without restriction, including
 *   without limitation the rights to use, copy, modify, merge, publish,
 *   distribute, sublicense, and/or sell copies of the Software, and to
 *   permit persons to whom the Software is furnished to do so, subject to
 *   the following conditions:
 *
 *   The above copyright notice and this permission notice shall be
 *   included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 ***************************************************************************/
/*************************************************************************
        This is based somewhat on MapIterator in the Ogre library (www.ogre3d.org)
*************************************************************************/
#ifndef _CEGUIIteratorBase_h_
#define _CEGUIIteratorBase_h_

#include "CEGUIBase.h"


// Start of CEGUI namespace section
namespace CEGUI
{
template<class T>
class ConstBaseIterator
{
public:
#if defined(_MSC_VER) && (_MSC_VER <= 1200) && !defined(_STLPORT_VERSION)
        typedef typename T::referent_type       mapped_type;
#else
        typedef typename T::mapped_type         mapped_type;
#endif

        ConstBaseIterator(typename T::const_iterator start_iter, typename T::const_iterator end_iter) :
                d_currIter(start_iter),
                d_startIter(start_iter),
                d_endIter(end_iter)
        {
        }

        
        ~ConstBaseIterator(void)
        {
        }


        ConstBaseIterator(const ConstBaseIterator<T>& org) :
                d_currIter(org.d_currIter),
                d_startIter(org.d_startIter),
                d_endIter(org.d_endIter)
        {
        }


        ConstBaseIterator<T>&   operator=(const ConstBaseIterator<T>& rhs)
        {
                d_currIter      = rhs.d_currIter;
                d_startIter     = rhs.d_startIter;
                d_endIter       = rhs.d_endIter;

                return *this;
        }


        typename T::key_type    getCurrentKey(void) const
        {
                return d_currIter->first;
        }


        mapped_type     getCurrentValue(void) const
        {
                return d_currIter->second;
        }


        bool    isAtEnd(void) const
        {
                return d_currIter == d_endIter;
        }


        bool    isAtStart(void) const
        {
                return d_currIter == d_startIter;
        }


        ConstBaseIterator<T>&   operator++()
        {
                if (d_currIter != d_endIter)
                        ++d_currIter;

                return *this;
        }


        ConstBaseIterator<T>    operator++(int)
        {
                ConstBaseIterator<T> tmp = *this;
                ++*this;

                return tmp;
        }


        ConstBaseIterator<T>&   operator--()
        {
                if (d_currIter != d_startIter)
                        --d_currIter;

                return *this;
        }


        ConstBaseIterator<T>    operator--(int)
        {
                ConstBaseIterator<T> tmp = *this;
                --*this;

                return tmp;
        }


        bool    operator==(const ConstBaseIterator<T>& rhs) const
        {
                return d_currIter == rhs.d_currIter;
        }


        bool    operator!=(const ConstBaseIterator<T>& rhs) const
        {
                return !operator==(rhs);
        }


        mapped_type     operator*() const
        {
                return d_currIter->second;
        }


        void    toStart(void)
        {
                d_currIter = d_startIter;
        }


        void    toEnd(void)
        {
                d_currIter = d_endIter;
        }


private:
        /*************************************************************************
                No default construction available
        *************************************************************************/
        ConstBaseIterator(void) {}

        /*************************************************************************
                Implementation Data
        *************************************************************************/
        typename T::const_iterator      d_currIter;             
        typename T::const_iterator      d_startIter;    
        typename T::const_iterator      d_endIter;              
};

} // End of  CEGUI namespace section


#endif  // end of guard _CEGUIIteratorBase_h_