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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CSSPropertyNames.h"
#include "Element.h"
#include <optional>
#include <wtf/Assertions.h>
namespace WebCore {
class Element;
class FloatSize;
class FontCascade;
class RenderStyle;
class RenderView;
namespace Style {
class BuilderState;
};
class CSSToLengthConversionData {
public:
// This is used during style building. The 'zoom' property is taken into account.
CSSToLengthConversionData(const RenderStyle&, Style::BuilderState&);
// This constructor ignores the `zoom` property.
CSSToLengthConversionData(const RenderStyle&, const RenderStyle* rootStyle, const RenderStyle* parentStyle, const RenderView*, const Element* elementForContainerUnitResolution = nullptr);
CSSToLengthConversionData() = default;
const RenderStyle* style() const { return m_style; }
const RenderStyle* rootStyle() const { return m_rootStyle; }
const RenderStyle* parentStyle() const { return m_parentStyle; }
float zoom() const;
bool computingFontSize() const { return m_propertyToCompute == CSSPropertyFontSize; }
bool computingLineHeight() const { return m_propertyToCompute == CSSPropertyLineHeight; }
CSSPropertyID propertyToCompute() const { return m_propertyToCompute.value_or(CSSPropertyInvalid); }
const RenderView* renderView() const { return m_renderView; }
const Element* elementForContainerUnitResolution() const { return m_elementForContainerUnitResolution.get(); }
const FontCascade& fontCascadeForFontUnits() const;
int computedLineHeightForFontUnits() const;
FloatSize defaultViewportFactor() const;
FloatSize smallViewportFactor() const;
FloatSize largeViewportFactor() const;
FloatSize dynamicViewportFactor() const;
CSSToLengthConversionData copyForFontSize() const
{
CSSToLengthConversionData copy(*this);
copy.m_zoom = 1.f;
copy.m_propertyToCompute = CSSPropertyFontSize;
return copy;
};
CSSToLengthConversionData copyWithAdjustedZoom(float zoom) const
{
CSSToLengthConversionData copy(*this);
copy.m_zoom = zoom;
return copy;
}
CSSToLengthConversionData copyForLineHeight(float zoom) const
{
CSSToLengthConversionData copy(*this);
copy.m_zoom = zoom;
copy.m_propertyToCompute = CSSPropertyLineHeight;
return copy;
}
void setUsesContainerUnits() const;
Style::BuilderState* styleBuilderState() const { return m_styleBuilderState; }
private:
const RenderStyle* m_style { nullptr };
const RenderStyle* m_rootStyle { nullptr };
const RenderStyle* m_parentStyle { nullptr };
const RenderView* m_renderView { nullptr };
RefPtr<const Element> m_elementForContainerUnitResolution;
std::optional<float> m_zoom;
std::optional<CSSPropertyID> m_propertyToCompute;
// FIXME: Remove this hack.
RenderStyle* m_viewportDependencyDetectionStyle { nullptr };
Style::BuilderState* m_styleBuilderState { nullptr };
};
} // namespace WebCore
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