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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __NS_SVGGRADIENTFRAME_H__
#define __NS_SVGGRADIENTFRAME_H__
#include "mozilla/Attributes.h"
#include "gfxMatrix.h"
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsLiteralString.h"
#include "nsSVGPaintServerFrame.h"
class gfxPattern;
class nsIAtom;
class nsIContent;
class nsIFrame;
class nsIPresShell;
class nsStyleContext;
struct gfxRect;
namespace mozilla {
class nsSVGAnimatedTransformList;
namespace dom {
class SVGLinearGradientElement;
class SVGRadialGradientElement;
} // namespace dom
} // namespace mozilla
/**
* Gradients can refer to other gradients. We create an nsSVGPaintingProperty
* with property type nsGkAtoms::href to track the referenced gradient.
*/
class nsSVGGradientFrame : public nsSVGPaintServerFrame
{
typedef mozilla::gfx::ExtendMode ExtendMode;
protected:
explicit nsSVGGradientFrame(nsStyleContext* aContext);
public:
NS_DECL_ABSTRACT_FRAME(nsSVGGradientFrame)
// nsSVGPaintServerFrame methods:
virtual already_AddRefed<gfxPattern>
GetPaintServerPattern(nsIFrame* aSource,
const DrawTarget* aDrawTarget,
const gfxMatrix& aContextMatrix,
nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
float aGraphicOpacity,
const gfxRect* aOverrideBounds) override;
// nsIFrame interface:
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGGradient"), aResult);
}
#endif // DEBUG
private:
// Parse our xlink:href and set up our nsSVGPaintingProperty if we
// reference another gradient and we don't have a property. Return
// the referenced gradient's frame if available, null otherwise.
nsSVGGradientFrame* GetReferencedGradient();
// Optionally get a stop frame (returns stop index/count)
void GetStopFrames(nsTArray<nsIFrame*>* aStopFrames);
const mozilla::nsSVGAnimatedTransformList* GetGradientTransformList(
nsIContent* aDefault);
// Will be singular for gradientUnits="objectBoundingBox" with an empty bbox.
gfxMatrix GetGradientTransform(nsIFrame *aSource,
const gfxRect *aOverrideBounds);
protected:
virtual bool GradientVectorLengthIsZero() = 0;
virtual already_AddRefed<gfxPattern> CreateGradient() = 0;
// Internal methods for handling referenced gradients
class AutoGradientReferencer;
nsSVGGradientFrame* GetReferencedGradientIfNotInUse();
// Accessors to lookup gradient attributes
uint16_t GetEnumValue(uint32_t aIndex, nsIContent *aDefault);
uint16_t GetEnumValue(uint32_t aIndex)
{
return GetEnumValue(aIndex, mContent);
}
uint16_t GetGradientUnits();
uint16_t GetSpreadMethod();
// Gradient-type-specific lookups since the length values differ between
// linear and radial gradients
virtual mozilla::dom::SVGLinearGradientElement * GetLinearGradientWithLength(
uint32_t aIndex, mozilla::dom::SVGLinearGradientElement* aDefault);
virtual mozilla::dom::SVGRadialGradientElement * GetRadialGradientWithLength(
uint32_t aIndex, mozilla::dom::SVGRadialGradientElement* aDefault);
// The frame our gradient is (currently) being applied to
nsIFrame* mSource;
private:
// Flag to mark this frame as "in use" during recursive calls along our
// gradient's reference chain so we can detect reference loops. See:
// http://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementHrefAttribute
bool mLoopFlag;
// Gradients often don't reference other gradients, so here we cache
// the fact that that isn't happening.
bool mNoHRefURI;
};
// -------------------------------------------------------------------------
// Linear Gradients
// -------------------------------------------------------------------------
class nsSVGLinearGradientFrame : public nsSVGGradientFrame
{
friend nsIFrame* NS_NewSVGLinearGradientFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
protected:
explicit nsSVGLinearGradientFrame(nsStyleContext* aContext)
: nsSVGGradientFrame(aContext) {}
public:
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame interface:
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
virtual nsIAtom* GetType() const override; // frame type: nsGkAtoms::svgLinearGradientFrame
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGLinearGradient"), aResult);
}
#endif // DEBUG
protected:
float GetLengthValue(uint32_t aIndex);
virtual mozilla::dom::SVGLinearGradientElement* GetLinearGradientWithLength(
uint32_t aIndex, mozilla::dom::SVGLinearGradientElement* aDefault) override;
virtual bool GradientVectorLengthIsZero() override;
virtual already_AddRefed<gfxPattern> CreateGradient() override;
};
// -------------------------------------------------------------------------
// Radial Gradients
// -------------------------------------------------------------------------
class nsSVGRadialGradientFrame : public nsSVGGradientFrame
{
friend nsIFrame* NS_NewSVGRadialGradientFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
protected:
explicit nsSVGRadialGradientFrame(nsStyleContext* aContext)
: nsSVGGradientFrame(aContext) {}
public:
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame interface:
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
virtual nsIAtom* GetType() const override; // frame type: nsGkAtoms::svgRadialGradientFrame
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGRadialGradient"), aResult);
}
#endif // DEBUG
protected:
float GetLengthValue(uint32_t aIndex);
float GetLengthValue(uint32_t aIndex, float aDefaultValue);
float GetLengthValueFromElement(uint32_t aIndex,
mozilla::dom::SVGRadialGradientElement& aElement);
virtual mozilla::dom::SVGRadialGradientElement* GetRadialGradientWithLength(
uint32_t aIndex, mozilla::dom::SVGRadialGradientElement* aDefault) override;
virtual bool GradientVectorLengthIsZero() override;
virtual already_AddRefed<gfxPattern> CreateGradient() override;
};
#endif // __NS_SVGGRADIENTFRAME_H__
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