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https://github.com/flutter/flutter.git
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251 lines
8.8 KiB
C++
251 lines
8.8 KiB
C++
/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_CSS_CSSGRADIENTVALUE_H_
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#define SKY_ENGINE_CORE_CSS_CSSGRADIENTVALUE_H_
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#include "sky/engine/core/css/CSSImageGeneratorValue.h"
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#include "sky/engine/core/css/CSSPrimitiveValue.h"
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#include "sky/engine/wtf/RefPtr.h"
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#include "sky/engine/wtf/Vector.h"
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namespace blink {
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class FloatPoint;
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class Gradient;
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class TextLinkColors;
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enum CSSGradientType {
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CSSDeprecatedLinearGradient,
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CSSDeprecatedRadialGradient,
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CSSPrefixedLinearGradient,
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CSSPrefixedRadialGradient,
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CSSLinearGradient,
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CSSRadialGradient
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};
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enum CSSGradientRepeat { NonRepeating, Repeating };
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struct CSSGradientColorStop {
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ALLOW_ONLY_INLINE_ALLOCATION();
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public:
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CSSGradientColorStop() : m_colorIsDerivedFromElement(false) { };
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RefPtr<CSSPrimitiveValue> m_position; // percentage or length
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RefPtr<CSSPrimitiveValue> m_color;
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Color m_resolvedColor;
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bool m_colorIsDerivedFromElement;
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bool operator==(const CSSGradientColorStop& other) const
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{
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return compareCSSValuePtr(m_color, other.m_color)
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&& compareCSSValuePtr(m_position, other.m_position);
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}
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};
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} // namespace blink
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// We have to declare the VectorTraits specialization before CSSGradientValue
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// declares its inline capacity vector below.
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WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::CSSGradientColorStop);
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namespace blink {
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class CSSGradientValue : public CSSImageGeneratorValue {
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public:
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PassRefPtr<Image> image(RenderObject*, const IntSize&);
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void setFirstX(PassRefPtr<CSSPrimitiveValue> val) { m_firstX = val; }
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void setFirstY(PassRefPtr<CSSPrimitiveValue> val) { m_firstY = val; }
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void setSecondX(PassRefPtr<CSSPrimitiveValue> val) { m_secondX = val; }
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void setSecondY(PassRefPtr<CSSPrimitiveValue> val) { m_secondY = val; }
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void addStop(const CSSGradientColorStop& stop) { m_stops.append(stop); }
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unsigned stopCount() const { return m_stops.size(); }
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void sortStopsIfNeeded();
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bool isRepeating() const { return m_repeating; }
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CSSGradientType gradientType() const { return m_gradientType; }
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bool isFixedSize() const { return false; }
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IntSize fixedSize(const RenderObject*) const { return IntSize(); }
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bool isPending() const { return false; }
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bool knownToBeOpaque(const RenderObject*) const;
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PassRefPtr<CSSGradientValue> gradientWithStylesResolved(const TextLinkColors&, Color currentColor);
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protected:
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CSSGradientValue(ClassType classType, CSSGradientRepeat repeat, CSSGradientType gradientType)
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: CSSImageGeneratorValue(classType)
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, m_stopsSorted(false)
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, m_gradientType(gradientType)
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, m_repeating(repeat == Repeating)
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{
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}
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CSSGradientValue(const CSSGradientValue& other, ClassType classType, CSSGradientType gradientType)
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: CSSImageGeneratorValue(classType)
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, m_firstX(other.m_firstX)
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, m_firstY(other.m_firstY)
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, m_secondX(other.m_secondX)
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, m_secondY(other.m_secondY)
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, m_stops(other.m_stops)
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, m_stopsSorted(other.m_stopsSorted)
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, m_gradientType(gradientType)
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, m_repeating(other.isRepeating() ? Repeating : NonRepeating)
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{
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}
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void addStops(Gradient*, const CSSToLengthConversionData&, float maxLengthForRepeat = 0);
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// Resolve points/radii to front end values.
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FloatPoint computeEndPoint(CSSPrimitiveValue*, CSSPrimitiveValue*, const CSSToLengthConversionData&, const IntSize&);
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bool isCacheable() const;
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// Points. Some of these may be null.
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RefPtr<CSSPrimitiveValue> m_firstX;
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RefPtr<CSSPrimitiveValue> m_firstY;
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RefPtr<CSSPrimitiveValue> m_secondX;
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RefPtr<CSSPrimitiveValue> m_secondY;
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// Stops
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Vector<CSSGradientColorStop, 2> m_stops;
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bool m_stopsSorted;
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CSSGradientType m_gradientType;
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bool m_repeating;
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};
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DEFINE_CSS_VALUE_TYPE_CASTS(CSSGradientValue, isGradientValue());
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class CSSLinearGradientValue : public CSSGradientValue {
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public:
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static PassRefPtr<CSSLinearGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSLinearGradient)
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{
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return adoptRef(new CSSLinearGradientValue(repeat, gradientType));
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}
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void setAngle(PassRefPtr<CSSPrimitiveValue> val) { m_angle = val; }
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String customCSSText() const;
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// Create the gradient for a given size.
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PassRefPtr<Gradient> createGradient(const CSSToLengthConversionData&, const IntSize&);
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PassRefPtr<CSSLinearGradientValue> clone() const
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{
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return adoptRef(new CSSLinearGradientValue(*this));
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}
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bool equals(const CSSLinearGradientValue&) const;
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private:
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CSSLinearGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSLinearGradient)
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: CSSGradientValue(LinearGradientClass, repeat, gradientType)
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{
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}
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explicit CSSLinearGradientValue(const CSSLinearGradientValue& other)
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: CSSGradientValue(other, LinearGradientClass, other.gradientType())
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, m_angle(other.m_angle)
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{
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}
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RefPtr<CSSPrimitiveValue> m_angle; // may be null.
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};
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DEFINE_CSS_VALUE_TYPE_CASTS(CSSLinearGradientValue, isLinearGradientValue());
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class CSSRadialGradientValue : public CSSGradientValue {
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public:
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static PassRefPtr<CSSRadialGradientValue> create(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSRadialGradient)
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{
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return adoptRef(new CSSRadialGradientValue(repeat, gradientType));
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}
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PassRefPtr<CSSRadialGradientValue> clone() const
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{
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return adoptRef(new CSSRadialGradientValue(*this));
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}
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String customCSSText() const;
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void setFirstRadius(PassRefPtr<CSSPrimitiveValue> val) { m_firstRadius = val; }
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void setSecondRadius(PassRefPtr<CSSPrimitiveValue> val) { m_secondRadius = val; }
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void setShape(PassRefPtr<CSSPrimitiveValue> val) { m_shape = val; }
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void setSizingBehavior(PassRefPtr<CSSPrimitiveValue> val) { m_sizingBehavior = val; }
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void setEndHorizontalSize(PassRefPtr<CSSPrimitiveValue> val) { m_endHorizontalSize = val; }
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void setEndVerticalSize(PassRefPtr<CSSPrimitiveValue> val) { m_endVerticalSize = val; }
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// Create the gradient for a given size.
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PassRefPtr<Gradient> createGradient(const CSSToLengthConversionData&, const IntSize&);
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bool equals(const CSSRadialGradientValue&) const;
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private:
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CSSRadialGradientValue(CSSGradientRepeat repeat, CSSGradientType gradientType = CSSRadialGradient)
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: CSSGradientValue(RadialGradientClass, repeat, gradientType)
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{
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}
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explicit CSSRadialGradientValue(const CSSRadialGradientValue& other)
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: CSSGradientValue(other, RadialGradientClass, other.gradientType())
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, m_firstRadius(other.m_firstRadius)
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, m_secondRadius(other.m_secondRadius)
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, m_shape(other.m_shape)
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, m_sizingBehavior(other.m_sizingBehavior)
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, m_endHorizontalSize(other.m_endHorizontalSize)
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, m_endVerticalSize(other.m_endVerticalSize)
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{
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}
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// Resolve points/radii to front end values.
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float resolveRadius(CSSPrimitiveValue*, const CSSToLengthConversionData&, float* widthOrHeight = 0);
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// These may be null for non-deprecated gradients.
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RefPtr<CSSPrimitiveValue> m_firstRadius;
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RefPtr<CSSPrimitiveValue> m_secondRadius;
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// The below are only used for non-deprecated gradients. Any of them may be null.
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RefPtr<CSSPrimitiveValue> m_shape;
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RefPtr<CSSPrimitiveValue> m_sizingBehavior;
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RefPtr<CSSPrimitiveValue> m_endHorizontalSize;
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RefPtr<CSSPrimitiveValue> m_endVerticalSize;
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};
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DEFINE_CSS_VALUE_TYPE_CASTS(CSSRadialGradientValue, isRadialGradientValue());
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} // namespace blink
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#endif // SKY_ENGINE_CORE_CSS_CSSGRADIENTVALUE_H_
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