mirrorviewcursor.h

// Description: MirrorViewCursor class
// Documentation: concrete_views.txt

#ifndef PASTELSYS_MIRRORVIEWCURSOR_H
#define PASTELSYS_MIRRORVIEWCURSOR_H

#include "pastel/sys/view/mirrorview.h"

namespace Pastel
{

    namespace MirrorView_
    {

        template <integer N, integer MirrorIndex, typename ConstCursor>
        class ConstMirrorViewCursor
        {
        public:
            using Element = typename ConstCursor::Element;
            using ConstReference = typename ConstCursor::ConstReference;

            explicit ConstMirrorViewCursor(
                const ConstCursor& cursor)
                : cursor_(cursor)
            {
            }

            void swap(ConstMirrorViewCursor& that)
            {
                cursor_.swap(that.cursor_);
            }

            void move(Vector<integer, N> amount)
            {
                amount[MirrorIndex] = -amount[MirrorIndex];
                cursor_.move(amount);
            }

            const Element* operator->() const
            {
                return cursor_.operator->();
            }

            ConstReference operator*() const
            {
                return *cursor_;
            }

        private:
            ConstCursor cursor_;
        };

        template <integer N, integer MirrorIndex, typename Cursor>
        class MirrorViewCursor
            : public ConstMirrorViewCursor<N, MirrorIndex, Cursor>
        {
        private:
            using Base = ConstMirrorViewCursor<N, MirrorIndex, Cursor>;

        public:
            using Element = typename Base::Element;
            using ConstReference = typename Base::ConstReference;

            using Reference = typename Cursor::Reference;

            explicit MirrorViewCursor(
                const Cursor& cursor)
                : Base(cursor)
            {
            }

            void swap(MirrorViewCursor& that)
            {
                Base::swap(that);
            }

            Element* operator->() const
            {
                return (Element*)Base::operator->();
            }

            Reference operator*() const
            {
                return (Element&)Base::operator*();
            }
        };

    }

}

#endif