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/*
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* Copyright (C) 2019-2025 Apple Inc. 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 "SVGLengthValue.h"
#include "SVGUnitTypes.h"
namespace WebCore {
class SVGElement;
class WeakPtrImplWithEventTargetData;
struct Length;
class SVGLengthContext {
public:
explicit SVGLengthContext(const SVGElement*);
~SVGLengthContext();
template<typename T>
static FloatRect resolveRectangle(const T* context, SVGUnitTypes::SVGUnitType type, const FloatRect& viewport)
{
return 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 = SVGLengthMode::Other);
ExceptionOr<float> convertValueToUserUnits(float, SVGLengthType, SVGLengthMode) const;
ExceptionOr<float> convertValueFromUserUnits(float, SVGLengthType, SVGLengthMode) const;
std::optional<FloatSize> viewportSize() const;
private:
ExceptionOr<float> convertValueFromUserUnitsToPercentage(float value, SVGLengthMode) const;
ExceptionOr<float> convertValueFromPercentageToUserUnits(float value, SVGLengthMode) const;
static float convertValueFromPercentageToUserUnits(float value, SVGLengthMode, FloatSize);
ExceptionOr<float> convertValueFromUserUnitsToEMS(float) const;
ExceptionOr<float> convertValueFromEMSToUserUnits(float) const;
ExceptionOr<float> convertValueFromUserUnitsToEXS(float) const;
ExceptionOr<float> convertValueFromEXSToUserUnits(float) const;
ExceptionOr<float> convertValueFromUserUnitsToLh(float) const;
ExceptionOr<float> convertValueFromLhToUserUnits(float) const;
ExceptionOr<float> convertValueFromUserUnitsToCh(float) const;
ExceptionOr<float> convertValueFromChToUserUnits(float) const;
std::optional<FloatSize> computeViewportSize() const;
RefPtr<const SVGElement> protectedContext() const;
WeakPtr<const SVGElement, WeakPtrImplWithEventTargetData> m_context;
mutable std::optional<FloatSize> m_viewportSize;
};
} // namespace WebCore
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