/*

    Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License

    along with this library; see the file COPYING.LIB.  If not, write to

    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

*/

#ifndef SVGPreserveAspectRatio_h

#define SVGPreserveAspectRatio_h

#if ENABLE(SVG)

#include "FloatRect.h"

#include "PlatformString.h"

#include "SVGNames.h"

namespace WebCore {

    class String;

    class AffineTransform;

    class SVGPreserveAspectRatio {

    public:

        enum SVGPreserveAspectRatioType {

            SVG_PRESERVEASPECTRATIO_UNKNOWN     = 0,

            SVG_PRESERVEASPECTRATIO_NONE        = 1,

            SVG_PRESERVEASPECTRATIO_XMINYMIN    = 2,

            SVG_PRESERVEASPECTRATIO_XMIDYMIN    = 3,

            SVG_PRESERVEASPECTRATIO_XMAXYMIN    = 4,

            SVG_PRESERVEASPECTRATIO_XMINYMID    = 5,

            SVG_PRESERVEASPECTRATIO_XMIDYMID    = 6,

            SVG_PRESERVEASPECTRATIO_XMAXYMID    = 7,

            SVG_PRESERVEASPECTRATIO_XMINYMAX    = 8,

            SVG_PRESERVEASPECTRATIO_XMIDYMAX    = 9,

            SVG_PRESERVEASPECTRATIO_XMAXYMAX    = 10

        };

        enum SVGMeetOrSliceType {

            SVG_MEETORSLICE_UNKNOWN    = 0,

            SVG_MEETORSLICE_MEET       = 1,

            SVG_MEETORSLICE_SLICE      = 2

        };

        SVGPreserveAspectRatio();

        virtual ~SVGPreserveAspectRatio();

        void setAlign(unsigned short);

        unsigned short align() const;

        void setMeetOrSlice(unsigned short);

        unsigned short meetOrSlice() const;

        void transformRect(FloatRect& destRect, FloatRect& srcRect);

        AffineTransform getCTM(double logicX, double logicY,

                               double logicWidth, double logicHeight,

                               double physX, double physY,

                               double physWidth, double physHeight) const;

        template<class Consumer>

        static bool parsePreserveAspectRatio(Consumer* consumer, const String& value, bool validate = true)

        {

            bool result = false;

            const UChar* begin = value.characters();

            const UChar* end = begin + value.length();

            consumer->setPreserveAspectRatioBaseValue(parsePreserveAspectRatio(begin, end, validate, result));

            return result;

        }

        // It's recommended to use the method above, only SVGViewSpec needs this parsing method

        static SVGPreserveAspectRatio parsePreserveAspectRatio(const UChar*& currParam, const UChar* end, bool validate, bool& result);

        String valueAsString() const;

    private:

        unsigned short m_align;

        unsigned short m_meetOrSlice;

    };

} // namespace WebCore

#endif // ENABLE(SVG)

#endif // SVGPreserveAspectRatio_h