/*

    Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2006 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 SVGLength_h

#define SVGLength_h

#if ENABLE(SVG)

#include "PlatformString.h"

namespace WebCore {

    enum SVGLengthType {

        LengthTypeUnknown = 0,

        LengthTypeNumber = 1,

        LengthTypePercentage = 2,

        LengthTypeEMS = 3,

        LengthTypeEXS = 4,

        LengthTypePX = 5,

        LengthTypeCM = 6,

        LengthTypeMM = 7,

        LengthTypeIN = 8,

        LengthTypePT = 9,

        LengthTypePC = 10

    };

    enum SVGLengthMode {

        LengthModeWidth = 0,

        LengthModeHeight,

        LengthModeOther

    };

    class SVGElement;

    class SVGLength {

    public:

        // Forward declare these enums in the w3c naming scheme, for IDL generation

        enum {

            SVG_LENGTHTYPE_UNKNOWN = LengthTypeUnknown,

            SVG_LENGTHTYPE_NUMBER = LengthTypeNumber,

            SVG_LENGTHTYPE_PERCENTAGE = LengthTypePercentage,

            SVG_LENGTHTYPE_EMS = LengthTypeEMS,

            SVG_LENGTHTYPE_EXS = LengthTypeEXS,

            SVG_LENGTHTYPE_PX = LengthTypePX,

            SVG_LENGTHTYPE_CM = LengthTypeCM,

            SVG_LENGTHTYPE_MM = LengthTypeMM,

            SVG_LENGTHTYPE_IN = LengthTypeIN,

            SVG_LENGTHTYPE_PT = LengthTypePT,

            SVG_LENGTHTYPE_PC = LengthTypePC

        };

        SVGLength(SVGLengthMode mode = LengthModeOther, const String& valueAsString = String());

        SVGLengthType unitType() const;

        float value(const SVGElement* context) const;

        void setValue(float);

        float valueInSpecifiedUnits() const;

        void setValueInSpecifiedUnits(float);

        float valueAsPercentage() const;

        String valueAsString() const;

        bool setValueAsString(const String&);

        void newValueSpecifiedUnits(unsigned short, float valueInSpecifiedUnits);

        void convertToSpecifiedUnits(unsigned short, const SVGElement* context);

        // Helper functions

        static float PercentageOfViewport(float value, const SVGElement* context, SVGLengthMode);

        inline bool isRelative() const

        {

            SVGLengthType type = unitType();

            return (type == LengthTypePercentage || type == LengthTypeEMS || type == LengthTypeEXS);

        }

    private:

        float m_valueInSpecifiedUnits;

        unsigned int m_unit;

    };

} // namespace WebCore

#endif // ENABLE(SVG)

#endif // SVGLength_h