domchildrenrange.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#pragma once
 
#include <boost/iterator.hpp>
#include <boost/iterator/function_input_iterator.hpp>
#include <boost/range.hpp>
#include <QDomElement>
#include <QString>
 
namespace LC
{
namespace Util
{
    namespace detail
    {
        class DomSiblingsIterator : public boost::iterator_facade<
                DomSiblingsIterator,
                QDomElement,
                boost::single_pass_traversal_tag,
                const QDomElement&
            >
        {
            QDomElement Elem_;
            const QString TagName_;
        public:
            DomSiblingsIterator () = default;
 
            DomSiblingsIterator (const QDomElement& firstChild, const QString& tagName)
            : Elem_ { firstChild }
            , TagName_ { tagName }
            {
            }
 
            void increment ()
            {
                Elem_ = Elem_.nextSiblingElement (TagName_);
            }
 
            const QDomElement& dereference () const
            {
                return Elem_;
            }
 
            bool equal (const DomSiblingsIterator& other) const
            {
                return Elem_ == other.Elem_;
            }
        };
    }
 
    inline auto DomChildren (const QDomNode& parent, const QString& tag)
    {
        auto child = parent.firstChildElement (tag);
        return boost::make_iterator_range<detail::DomSiblingsIterator> ({ child, tag }, {});
    }
}
}