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/*
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* 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 SVGLengthContext_h
#define SVGLengthContext_h
#include "core/svg/SVGUnitTypes.h"
#include "platform/geometry/FloatRect.h"
namespace WebCore {
class ExceptionState;
class SVGElement;
class SVGLength;
enum SVGLengthType {
LengthTypeUnknown = 0,
LengthTypeNumber,
LengthTypePercentage,
LengthTypeEMS,
LengthTypeEXS,
LengthTypePX,
LengthTypeCM,
LengthTypeMM,
LengthTypeIN,
LengthTypePT,
LengthTypePC
};
enum SVGLengthMode {
LengthModeWidth = 0,
LengthModeHeight,
LengthModeOther
};
class SVGLengthContext {
public:
explicit SVGLengthContext(const SVGElement*);
template<typename T>
static FloatRect resolveRectangle(const T* context, SVGUnitTypes::SVGUnitType type, const FloatRect& viewport)
{
return SVGLengthContext::resolveRectangle(context, type, viewport, context->xCurrentValue(), context->yCurrentValue(), context->widthCurrentValue(), context->heightCurrentValue());
}
static FloatRect resolveRectangle(const SVGElement*, SVGUnitTypes::SVGUnitType, const FloatRect& viewport, const SVGLength& x, const SVGLength& y, const SVGLength& width, const SVGLength& height);
static FloatPoint resolvePoint(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLength& x, const SVGLength& y);
static float resolveLength(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLength&);
float convertValueToUserUnits(float, SVGLengthMode, SVGLengthType fromUnit, ExceptionState&) const;
float convertValueFromUserUnits(float, SVGLengthMode, SVGLengthType toUnit, ExceptionState&) const;
bool determineViewport(FloatSize&) const;
private:
SVGLengthContext(const SVGElement*, const FloatRect& viewport);
float convertValueFromUserUnitsToPercentage(float value, SVGLengthMode, ExceptionState&) const;
float convertValueFromPercentageToUserUnits(float value, SVGLengthMode, ExceptionState&) const;
float convertValueFromUserUnitsToEMS(float value, ExceptionState&) const;
float convertValueFromEMSToUserUnits(float value, ExceptionState&) const;
float convertValueFromUserUnitsToEXS(float value, ExceptionState&) const;
float convertValueFromEXSToUserUnits(float value, ExceptionState&) const;
const SVGElement* m_context;
FloatRect m_overridenViewport;
};
} // namespace WebCore
#endif // SVGLengthContext_h
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