WebCore/ksvg2/svg/SVGLength.h

/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005 Rob Buis <buis@kde.org>

    This file is part of the KDE project

    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., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.
*/

#ifndef KSVG_SVGLengthImpl_H
#define KSVG_SVGLengthImpl_H
#ifdef SVG_SUPPORT

#include "PlatformString.h"
#include <ksvg2/svg/SVGHelper.h>

namespace WebCore {

    class RenderPath;
    class SVGElement;
    class SVGStyledElement;

    class SVGLength : public Shared<SVGLength> {
    public:
        SVGLength(const SVGStyledElement* context, LengthMode mode = LM_UNKNOWN, const SVGElement* viewport = 0);
        virtual ~SVGLength();
        
        enum SVGLengthType {
            SVG_LENGTHTYPE_UNKNOWN          = 0,
            SVG_LENGTHTYPE_NUMBER           = 1,
            SVG_LENGTHTYPE_PERCENTAGE       = 2,
            SVG_LENGTHTYPE_EMS              = 3,
            SVG_LENGTHTYPE_EXS              = 4,
            SVG_LENGTHTYPE_PX               = 5,
            SVG_LENGTHTYPE_CM               = 6,
            SVG_LENGTHTYPE_MM               = 7,
            SVG_LENGTHTYPE_IN               = 8,
            SVG_LENGTHTYPE_PT               = 9,
            SVG_LENGTHTYPE_PC               = 10
        };

        // 'SVGLength' functions
        unsigned short unitType() const;

        float value() const;
        void setValue(float value);

        float valueInSpecifiedUnits() const;
        void setValueInSpecifiedUnits(float valueInSpecifiedUnits);

        String valueAsString() const;
        void setValueAsString(const String&);

        void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits);
        void convertToSpecifiedUnits(unsigned short unitType);

        // Helpers
        bool bboxRelative() const;
        void setBboxRelative(bool);

        const SVGStyledElement* context() const;
        void setContext(const SVGStyledElement *context);

    private:
        bool updateValueInSpecifiedUnits(bool notify = true);
        void updateValue(bool notify = true);

        double dpi() const;

        float m_value;
        float m_valueInSpecifiedUnits;

        unsigned m_mode : 2; // LengthMode
        bool m_bboxRelative : 1;
        unsigned m_unitType : 4;
        bool m_requiresLayout : 1;

        const SVGStyledElement *m_context;
        const SVGElement *m_viewportElement;
    };

} // namespace WebCore

#endif // SVG_SUPPORT
#endif // KSVG_SVGLengthImpl_H

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