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/*
* Copyright (C) 2008-2021 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "CSSImageGeneratorValue.h"
#include "CSSPrimitiveValue.h"
#include "ColorInterpolationMethod.h"
#include "Gradient.h"
namespace WebCore {
namespace Style {
class BuilderState;
}
enum CSSGradientType {
CSSDeprecatedLinearGradient,
CSSDeprecatedRadialGradient,
CSSPrefixedLinearGradient,
CSSPrefixedRadialGradient,
CSSLinearGradient,
CSSRadialGradient,
CSSConicGradient
};
enum CSSGradientRepeat { NonRepeating, Repeating };
struct CSSGradientColorStop {
RefPtr<CSSPrimitiveValue> color;
RefPtr<CSSPrimitiveValue> position; // percentage or length
Color resolvedColor;
};
inline bool operator==(const CSSGradientColorStop& a, const CSSGradientColorStop& b)
{
return compareCSSValuePtr(a.color, b.color) && compareCSSValuePtr(a.position, b.position);
}
class CSSGradientValue : public CSSImageGeneratorValue {
public:
void setFirstX(RefPtr<CSSPrimitiveValue>&& value) { m_firstX = WTFMove(value); }
void setFirstY(RefPtr<CSSPrimitiveValue>&& value) { m_firstY = WTFMove(value); }
void setSecondX(RefPtr<CSSPrimitiveValue>&& value) { m_secondX = WTFMove(value); }
void setSecondY(RefPtr<CSSPrimitiveValue>&& value) { m_secondY = WTFMove(value); }
void addStop(CSSGradientColorStop&& stop) { m_stops.append(WTFMove(stop)); }
void doneAddingStops() { m_stops.shrinkToFit(); }
bool hasAtLeastTwoStops() const { return m_stops.size() >= 2; }
void resolveRGBColors();
CSSGradientType gradientType() const { return m_gradientType; }
RefPtr<Image> image(RenderElement&, const FloatSize&);
bool knownToBeOpaque(const RenderElement&) const;
static constexpr bool isFixedSize() { return false; }
static FloatSize fixedSize(const RenderElement&) { return FloatSize(); }
static constexpr bool isPending() { return false; }
static void loadSubimages(CachedResourceLoader&, const ResourceLoaderOptions&) { }
Ref<CSSGradientValue> valueWithStylesResolved(Style::BuilderState&);
protected:
CSSGradientValue(ClassType classType, CSSGradientRepeat repeat, CSSGradientType gradientType, ColorInterpolationMethod colorInterpolationMethod)
: CSSImageGeneratorValue(classType)
, m_gradientType(gradientType)
, m_repeating(repeat == Repeating)
, m_colorInterpolationMethod(colorInterpolationMethod)
{
}
CSSGradientValue(const CSSGradientValue& other, ClassType classType)
: CSSImageGeneratorValue(classType)
, m_firstX(other.m_firstX)
, m_firstY(other.m_firstY)
, m_secondX(other.m_secondX)
, m_secondY(other.m_secondY)
, m_stops(other.m_stops)
, m_gradientType(other.m_gradientType)
, m_repeating(other.m_repeating)
, m_colorInterpolationMethod(other.m_colorInterpolationMethod)
, m_hasColorDerivedFromElement(other.m_hasColorDerivedFromElement)
{
}
template<typename GradientAdapter> GradientColorStops computeStops(GradientAdapter&, const CSSToLengthConversionData&, const RenderStyle&, float maxLengthForRepeat);
auto firstX() const { return m_firstX.get(); }
auto firstY() const { return m_firstY.get(); }
auto secondX() const { return m_secondX.get(); }
auto secondY() const { return m_secondY.get(); }
auto& stops() const { return m_stops; }
bool isRepeating() const { return m_repeating; }
auto colorInterpolationMethod() const { return m_colorInterpolationMethod; }
bool equals(const CSSGradientValue&) const;
private:
bool hasColorDerivedFromElement() const;
bool isCacheable() const;
RefPtr<CSSPrimitiveValue> m_firstX;
RefPtr<CSSPrimitiveValue> m_firstY;
RefPtr<CSSPrimitiveValue> m_secondX;
RefPtr<CSSPrimitiveValue> m_secondY;
Vector<CSSGradientColorStop, 2> m_stops;
CSSGradientType m_gradientType;
bool m_repeating { false };
ColorInterpolationMethod m_colorInterpolationMethod;
mutable std::optional<bool> m_hasColorDerivedFromElement;
};
class CSSLinearGradientValue final : public CSSGradientValue {
public:
static Ref<CSSLinearGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType, ColorInterpolationMethod colorInterpolationMethod)
{
return adoptRef(*new CSSLinearGradientValue(repeat, gradientType, colorInterpolationMethod));
}
void setAngle(Ref<CSSPrimitiveValue>&& value) { m_angle = WTFMove(value); }
String customCSSText() const;
// Create the gradient for a given size.
Ref<Gradient> createGradient(RenderElement&, const FloatSize&);
Ref<CSSLinearGradientValue> clone() const
{
return adoptRef(*new CSSLinearGradientValue(*this));
}
bool equals(const CSSLinearGradientValue&) const;
private:
CSSLinearGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType, ColorInterpolationMethod colorInterpolationMethod)
: CSSGradientValue(LinearGradientClass, repeat, gradientType, colorInterpolationMethod)
{
}
CSSLinearGradientValue(const CSSLinearGradientValue& other)
: CSSGradientValue(other, LinearGradientClass)
, m_angle(other.m_angle)
{
}
RefPtr<CSSPrimitiveValue> m_angle; // may be null.
};
class CSSRadialGradientValue final : public CSSGradientValue {
public:
static Ref<CSSRadialGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType, ColorInterpolationMethod colorInterpolationMethod)
{
return adoptRef(*new CSSRadialGradientValue(repeat, gradientType, colorInterpolationMethod));
}
Ref<CSSRadialGradientValue> clone() const
{
return adoptRef(*new CSSRadialGradientValue(*this));
}
String customCSSText() const;
void setFirstRadius(RefPtr<CSSPrimitiveValue>&& value) { m_firstRadius = WTFMove(value); }
void setSecondRadius(RefPtr<CSSPrimitiveValue>&& value) { m_secondRadius = WTFMove(value); }
void setShape(RefPtr<CSSPrimitiveValue>&& value) { m_shape = WTFMove(value); }
void setSizingBehavior(RefPtr<CSSPrimitiveValue>&& value) { m_sizingBehavior = WTFMove(value); }
void setEndHorizontalSize(RefPtr<CSSPrimitiveValue>&& value) { m_endHorizontalSize = WTFMove(value); }
void setEndVerticalSize(RefPtr<CSSPrimitiveValue>&& value) { m_endVerticalSize = WTFMove(value); }
// Create the gradient for a given size.
Ref<Gradient> createGradient(RenderElement&, const FloatSize&);
bool equals(const CSSRadialGradientValue&) const;
private:
CSSRadialGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType, ColorInterpolationMethod colorInterpolationMethod)
: CSSGradientValue(RadialGradientClass, repeat, gradientType, colorInterpolationMethod)
{
}
CSSRadialGradientValue(const CSSRadialGradientValue& other)
: CSSGradientValue(other, RadialGradientClass)
, m_firstRadius(other.m_firstRadius)
, m_secondRadius(other.m_secondRadius)
, m_shape(other.m_shape)
, m_sizingBehavior(other.m_sizingBehavior)
, m_endHorizontalSize(other.m_endHorizontalSize)
, m_endVerticalSize(other.m_endVerticalSize)
{
}
// Resolve points/radii to front end values.
float resolveRadius(CSSPrimitiveValue&, const CSSToLengthConversionData&, float* widthOrHeight = 0);
// These may be null for non-deprecated gradients.
RefPtr<CSSPrimitiveValue> m_firstRadius;
RefPtr<CSSPrimitiveValue> m_secondRadius;
// The below are only used for non-deprecated gradients. Any of them may be null.
RefPtr<CSSPrimitiveValue> m_shape;
RefPtr<CSSPrimitiveValue> m_sizingBehavior;
RefPtr<CSSPrimitiveValue> m_endHorizontalSize;
RefPtr<CSSPrimitiveValue> m_endVerticalSize;
};
class CSSConicGradientValue final : public CSSGradientValue {
public:
static Ref<CSSConicGradientValue> create(CSSGradientRepeat repeat, ColorInterpolationMethod colorInterpolationMethod)
{
return adoptRef(*new CSSConicGradientValue(repeat, colorInterpolationMethod));
}
Ref<CSSConicGradientValue> clone() const
{
return adoptRef(*new CSSConicGradientValue(*this));
}
String customCSSText() const;
void setAngle(RefPtr<CSSPrimitiveValue>&& value) { m_angle = WTFMove(value); }
// Create the gradient for a given size.
Ref<Gradient> createGradient(RenderElement&, const FloatSize&);
bool equals(const CSSConicGradientValue&) const;
private:
explicit CSSConicGradientValue(CSSGradientRepeat repeat, ColorInterpolationMethod colorInterpolationMethod)
: CSSGradientValue(ConicGradientClass, repeat, CSSConicGradient, colorInterpolationMethod)
{
}
CSSConicGradientValue(const CSSConicGradientValue& other)
: CSSGradientValue(other, ConicGradientClass)
, m_angle(other.m_angle)
{
}
RefPtr<CSSPrimitiveValue> m_angle; // may be null.
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSGradientValue, isGradientValue())
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSLinearGradientValue, isLinearGradientValue())
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSRadialGradientValue, isRadialGradientValue())
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSConicGradientValue, isConicGradientValue())