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