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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "gfxRect.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 nsAtom;
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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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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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/**
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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 nsSVGPaintServerFrame {
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typedef mozilla::gfx::ExtendMode ExtendMode;
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protected:
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nsSVGGradientFrame(nsStyleContext* aContext, ClassID aID);
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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> GetPaintServerPattern(
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nsIFrame* aSource, const DrawTarget* aDrawTarget,
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const gfxMatrix& aContextMatrix,
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nsStyleSVGPaint nsStyleSVG::*aFillOrStroke, float aOpacity,
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imgDrawingParams& aImgParams, const gfxRect* aOverrideBounds) override;
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// nsIFrame interface:
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virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* 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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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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// 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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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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class nsSVGLinearGradientFrame : public nsSVGGradientFrame {
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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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: nsSVGGradientFrame(aContext, kClassID) {}
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsSVGLinearGradientFrame)
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// nsIFrame interface:
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* 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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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,
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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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class nsSVGRadialGradientFrame : public nsSVGGradientFrame {
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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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: nsSVGGradientFrame(aContext, kClassID) {}
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsSVGRadialGradientFrame)
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// nsIFrame interface:
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* 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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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(
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uint32_t aIndex, mozilla::dom::SVGRadialGradientElement& aElement);
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virtual mozilla::dom::SVGRadialGradientElement* GetRadialGradientWithLength(
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uint32_t aIndex,
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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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