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/*
* Copyright (C) 2008 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 COMPUTER, 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 COMPUTER, 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.
*/
#ifndef CSSGradientValue_h
#define CSSGradientValue_h
#include "core/css/CSSImageGeneratorValue.h"
#include "core/css/CSSPrimitiveValue.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace WebCore {
class FloatPoint;
class Gradient;
class TextLinkColors;
enum CSSGradientType {
CSSDeprecatedLinearGradient,
CSSDeprecatedRadialGradient,
CSSPrefixedLinearGradient,
CSSPrefixedRadialGradient,
CSSLinearGradient,
CSSRadialGradient
};
enum CSSGradientRepeat { NonRepeating, Repeating };
struct CSSGradientColorStop {
CSSGradientColorStop() : m_colorIsDerivedFromElement(false) { };
RefPtr<CSSPrimitiveValue> m_position; // percentage or length
RefPtr<CSSPrimitiveValue> m_color;
Color m_resolvedColor;
bool m_colorIsDerivedFromElement;
bool operator==(const CSSGradientColorStop& other) const
{
return compareCSSValuePtr(m_color, other.m_color)
&& compareCSSValuePtr(m_position, other.m_position);
}
};
class CSSGradientValue : public CSSImageGeneratorValue {
public:
PassRefPtr<Image> image(RenderObject*, const IntSize&);
void setFirstX(PassRefPtr<CSSPrimitiveValue> val) { m_firstX = val; }
void setFirstY(PassRefPtr<CSSPrimitiveValue> val) { m_firstY = val; }
void setSecondX(PassRefPtr<CSSPrimitiveValue> val) { m_secondX = val; }
void setSecondY(PassRefPtr<CSSPrimitiveValue> val) { m_secondY = val; }
void addStop(const CSSGradientColorStop& stop) { m_stops.append(stop); }
unsigned stopCount() const { return m_stops.size(); }
void sortStopsIfNeeded();
bool isRepeating() const { return m_repeating; }
CSSGradientType gradientType() const { return m_gradientType; }
bool isFixedSize() const { return false; }
IntSize fixedSize(const RenderObject*) const { return IntSize(); }
bool isPending() const { return false; }
bool knownToBeOpaque(const RenderObject*) const;
void loadSubimages(ResourceFetcher*) { }
PassRefPtr<CSSGradientValue> gradientWithStylesResolved(const TextLinkColors&, Color currentColor);
protected:
CSSGradientValue(ClassType classType, CSSGradientRepeat repeat, CSSGradientType gradientType)
: CSSImageGeneratorValue(classType)
, m_stopsSorted(false)
, m_gradientType(gradientType)
, m_repeating(repeat == Repeating)
{
}
CSSGradientValue(const CSSGradientValue& other, ClassType classType, CSSGradientType gradientType)
: 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_stopsSorted(other.m_stopsSorted)
, m_gradientType(gradientType)
, m_repeating(other.isRepeating() ? Repeating : NonRepeating)
{
}
void addStops(Gradient*, RenderObject*, RenderStyle* rootStyle, float maxLengthForRepeat = 0);
// Resolve points/radii to front end values.
FloatPoint computeEndPoint(CSSPrimitiveValue*, CSSPrimitiveValue*, RenderStyle*, RenderStyle* rootStyle, const IntSize&);
bool isCacheable() const;
// Points. Some of these may be null.
RefPtr<CSSPrimitiveValue> m_firstX;
RefPtr<CSSPrimitiveValue> m_firstY;
RefPtr<CSSPrimitiveValue> m_secondX;
RefPtr<CSSPrimitiveValue> m_secondY;
// Stops
Vector<CSSGradientColorStop, 2> m_stops;
bool m_stopsSorted;
CSSGradientType m_gradientType;
bool m_repeating;
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSGradientValue, isGradientValue());
class CSSLinearGradientValue : public CSSGradientValue {
public:
static PassRefPtr<CSSLinearGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSLinearGradient)
{
return adoptRef(new CSSLinearGradientValue(repeat, gradientType));
}
void setAngle(PassRefPtr<CSSPrimitiveValue> val) { m_angle = val; }
String customCSSText() const;
// Create the gradient for a given size.
PassRefPtr<Gradient> createGradient(RenderObject*, const IntSize&);
PassRefPtr<CSSLinearGradientValue> clone() const
{
return adoptRef(new CSSLinearGradientValue(*this));
}
bool equals(const CSSLinearGradientValue&) const;
private:
CSSLinearGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSLinearGradient)
: CSSGradientValue(LinearGradientClass, repeat, gradientType)
{
}
explicit CSSLinearGradientValue(const CSSLinearGradientValue& other)
: CSSGradientValue(other, LinearGradientClass, other.gradientType())
, m_angle(other.m_angle)
{
}
RefPtr<CSSPrimitiveValue> m_angle; // may be null.
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSLinearGradientValue, isLinearGradientValue());
class CSSRadialGradientValue : public CSSGradientValue {
public:
static PassRefPtr<CSSRadialGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSRadialGradient)
{
return adoptRef(new CSSRadialGradientValue(repeat, gradientType));
}
PassRefPtr<CSSRadialGradientValue> clone() const
{
return adoptRef(new CSSRadialGradientValue(*this));
}
String customCSSText() const;
void setFirstRadius(PassRefPtr<CSSPrimitiveValue> val) { m_firstRadius = val; }
void setSecondRadius(PassRefPtr<CSSPrimitiveValue> val) { m_secondRadius = val; }
void setShape(PassRefPtr<CSSPrimitiveValue> val) { m_shape = val; }
void setSizingBehavior(PassRefPtr<CSSPrimitiveValue> val) { m_sizingBehavior = val; }
void setEndHorizontalSize(PassRefPtr<CSSPrimitiveValue> val) { m_endHorizontalSize = val; }
void setEndVerticalSize(PassRefPtr<CSSPrimitiveValue> val) { m_endVerticalSize = val; }
// Create the gradient for a given size.
PassRefPtr<Gradient> createGradient(RenderObject*, const IntSize&);
bool equals(const CSSRadialGradientValue&) const;
private:
CSSRadialGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSRadialGradient)
: CSSGradientValue(RadialGradientClass, repeat, gradientType)
{
}
explicit CSSRadialGradientValue(const CSSRadialGradientValue& other)
: CSSGradientValue(other, RadialGradientClass, other.gradientType())
, 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*, RenderStyle*, RenderStyle* rootStyle, 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;
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSRadialGradientValue, isRadialGradientValue());
} // namespace WebCore
#endif // CSSGradientValue_h