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/*
* Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 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 "ExceptionCode.h"
#include "SVGPropertyTraits.h"
namespace WebCore {
class CSSPrimitiveValue;
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());
SVGLength(const SVGLength&);
SVGLengthType unitType() const;
bool operator==(const SVGLength&) const;
bool operator!=(const SVGLength&) const;
float value(const SVGElement* context) const;
float value(const SVGElement* context, ExceptionCode&) const;
void setValue(float, const SVGElement* context, ExceptionCode&);
float valueInSpecifiedUnits() const { return m_valueInSpecifiedUnits; }
void setValueInSpecifiedUnits(float value) { m_valueInSpecifiedUnits = value; }
float valueAsPercentage() const;
String valueAsString() const;
void setValueAsString(const String&, ExceptionCode&);
void newValueSpecifiedUnits(unsigned short, float valueInSpecifiedUnits, ExceptionCode&);
void convertToSpecifiedUnits(unsigned short, const SVGElement* context, ExceptionCode&);
// Helper functions
inline bool isRelative() const
{
SVGLengthType type = unitType();
return type == LengthTypePercentage || type == LengthTypeEMS || type == LengthTypeEXS;
}
static SVGLength fromCSSPrimitiveValue(CSSPrimitiveValue*);
static PassRefPtr<CSSPrimitiveValue> toCSSPrimitiveValue(const SVGLength&);
private:
bool determineViewport(const SVGElement* context, float& width, float& height) const;
float convertValueFromPercentageToUserUnits(float value, const SVGElement* context, ExceptionCode&) const;
float convertValueFromUserUnitsToPercentage(float value, const SVGElement* context, ExceptionCode&) const;
float convertValueFromUserUnitsToEMS(float value, const SVGElement* context, ExceptionCode&) const;
float convertValueFromEMSToUserUnits(float value, const SVGElement* context, ExceptionCode&) const;
float convertValueFromUserUnitsToEXS(float value, const SVGElement* context, ExceptionCode&) const;
float convertValueFromEXSToUserUnits(float value, const SVGElement* context, ExceptionCode&) const;
private:
float m_valueInSpecifiedUnits;
unsigned int m_unit;
};
template<>
struct SVGPropertyTraits<SVGLength> {
static SVGLength initialValue() { return SVGLength(); }
static String toString(const SVGLength& type) { return type.valueAsString(); }
};
} // namespace WebCore
#endif // ENABLE(SVG)
#endif // SVGLength_h
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