Xport: XHTML Parsing and Objective Reporting Toolkit

/************************************************************************
Xport: XHTML Parsing & Objective Reporting Toolkit
Copyright (C) 2007  Mitchel Haas

This file is part of Xport.

Xport 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.

Xport 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 Xport.  If not, see <http://www.gnu.org/licenses/>.

For complete documentation on this library and alternative
licensing options, visit http://www.xportpro.com
Email questions, comments or suggestions to mitchel.haas@xportpro.com
************************************************************************/
#pragma once
#include "markup_iterator.h"
#include <list>

namespace Xport 
{
  template<typename T, typename U> class xhtml_markup;
  template<typename T, typename U, typename V, typename W> class reverse_markup_iterator;
  template<typename T, typename U, typename V, typename W> class descendant_markup_iterator;
}

namespace XportPro
{
  template<typename T, typename U> class xp_markup;
}


/************************************************************************/
/* reverse_markup_iterator                                        */
/************************************************************************/
template<typename node_type, typename CT, typename pointer_type, typename reference_type>
class Xport::reverse_markup_iterator : public Xport::markup_iterator<node_type, CT, pointer_type, reference_type>
{
  typedef markup_iterator<node_type, CT, pointer_type, reference_type> child_iterator_type;
public:
  // constructors/destructor
  reverse_markup_iterator() : child_iterator_type::pIt_parent(0) {}
  // conversion constructor for const_reverse_iterator, copy constructor for reverse_iterator
  reverse_markup_iterator(const reverse_markup_iterator<node_type, CT, node_type*, node_type&>& src) : child_iterator_type(src) {}
  explicit reverse_markup_iterator(const child_iterator_type& _it) : child_iterator_type(_it) {}
  virtual ~reverse_markup_iterator() {}

  // destructor and assignment operator will be compiler generated correctly

public:
  // overloaded operators
  reference_type operator*() const { child_iterator_type tmp(*this); return (*--tmp); }
  pointer_type operator->() const { child_iterator_type tmp(*this); --tmp; return tmp.operator ->(); }

  reverse_markup_iterator& operator ++() { child_iterator_type::operator --(); return *this; }
  reverse_markup_iterator operator ++(int) { reverse_markup_iterator old(*this); ++*this; return old; }
  reverse_markup_iterator& operator --() { child_iterator_type::operator ++(); return *this; }
  reverse_markup_iterator operator --(int) { reverse_markup_iterator old(*this); --*this; return old; }

  child_iterator_type base() { return child_iterator_type(*this); }

  // friends
  #if defined(_MSC_VER) && _MSC_VER < 1300
    friend class xhtml_markup<xhtml_strict, CT>;
    friend class xhtml_markup<xhtml_frameset, CT>;
    friend class xhtml_markup<xhtml_transitional, CT>;
    friend class descendant_markup_iterator<node_type, CT, pointer_type, reference_type>;
  #else
    template<typename T, typename U> friend class xhtml_markup;
    template<typename T, typename U, typename V, typename W> friend class descendant_markup_iterator;
  #endif
  friend class reverse_markup_iterator<node_type, CT, const node_type*, const node_type&>; // needed for conversion constructor
  friend class XportPro::xp_markup<xhtml_strict, CT>;
  friend class XportPro::xp_markup<xhtml_transitional, CT>;
  friend class XportPro::xp_markup<xhtml_frameset, CT>;

};