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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.
*/
#pragma once
#include "ExceptionOr.h"
#include "FloatRect.h"
#include "SVGUnitTypes.h"
namespace WebCore {
class SVGElement;
class SVGLengthValue;
struct Length;
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->x(), context->y(), context->width(), context->height());
}
static FloatRect resolveRectangle(const SVGElement*, SVGUnitTypes::SVGUnitType, const FloatRect& viewport, const SVGLengthValue& x, const SVGLengthValue& y, const SVGLengthValue& width, const SVGLengthValue& height);
static FloatPoint resolvePoint(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLengthValue& x, const SVGLengthValue& y);
static float resolveLength(const SVGElement*, SVGUnitTypes::SVGUnitType, const SVGLengthValue&);
float valueForLength(const Length&, SVGLengthMode = LengthModeOther);
ExceptionOr<float> convertValueToUserUnits(float, SVGLengthMode, SVGLengthType fromUnit) const;
ExceptionOr<float> convertValueFromUserUnits(float, SVGLengthMode, SVGLengthType toUnit) const;
bool determineViewport(FloatSize&) const;
private:
SVGLengthContext(const SVGElement*, const FloatRect& viewport);
ExceptionOr<float> convertValueFromUserUnitsToPercentage(float value, SVGLengthMode) const;
ExceptionOr<float> convertValueFromPercentageToUserUnits(float value, SVGLengthMode) const;
ExceptionOr<float> convertValueFromUserUnitsToEMS(float value) const;
ExceptionOr<float> convertValueFromEMSToUserUnits(float value) const;
ExceptionOr<float> convertValueFromUserUnitsToEXS(float value) const;
ExceptionOr<float> convertValueFromEXSToUserUnits(float value) const;
const SVGElement* m_context;
FloatRect m_overridenViewport;
};
} // namespace WebCore