1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGGradientFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,216 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef __NS_SVGGRADIENTFRAME_H__
1.10 +#define __NS_SVGGRADIENTFRAME_H__
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "gfxMatrix.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsFrame.h"
1.16 +#include "nsLiteralString.h"
1.17 +#include "nsSVGPaintServerFrame.h"
1.18 +
1.19 +class gfxPattern;
1.20 +class nsIAtom;
1.21 +class nsIContent;
1.22 +class nsIFrame;
1.23 +class nsIPresShell;
1.24 +class nsStyleContext;
1.25 +
1.26 +struct gfxRect;
1.27 +
1.28 +namespace mozilla {
1.29 +class nsSVGAnimatedTransformList;
1.30 +
1.31 +namespace dom {
1.32 +class SVGLinearGradientElement;
1.33 +class SVGRadialGradientElement;
1.34 +} // namespace dom
1.35 +} // namespace mozilla
1.36 +
1.37 +typedef nsSVGPaintServerFrame nsSVGGradientFrameBase;
1.38 +
1.39 +/**
1.40 + * Gradients can refer to other gradients. We create an nsSVGPaintingProperty
1.41 + * with property type nsGkAtoms::href to track the referenced gradient.
1.42 + */
1.43 +class nsSVGGradientFrame : public nsSVGGradientFrameBase
1.44 +{
1.45 +protected:
1.46 + nsSVGGradientFrame(nsStyleContext* aContext);
1.47 +
1.48 +public:
1.49 + NS_DECL_FRAMEARENA_HELPERS
1.50 +
1.51 + // nsSVGPaintServerFrame methods:
1.52 + virtual already_AddRefed<gfxPattern>
1.53 + GetPaintServerPattern(nsIFrame *aSource,
1.54 + const gfxMatrix& aContextMatrix,
1.55 + nsStyleSVGPaint nsStyleSVG::*aFillOrStroke,
1.56 + float aGraphicOpacity,
1.57 + const gfxRect *aOverrideBounds) MOZ_OVERRIDE;
1.58 +
1.59 + // nsIFrame interface:
1.60 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.61 + nsIAtom* aAttribute,
1.62 + int32_t aModType) MOZ_OVERRIDE;
1.63 +
1.64 +#ifdef DEBUG_FRAME_DUMP
1.65 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.66 + {
1.67 + return MakeFrameName(NS_LITERAL_STRING("SVGGradient"), aResult);
1.68 + }
1.69 +#endif // DEBUG
1.70 +
1.71 +private:
1.72 +
1.73 + // Parse our xlink:href and set up our nsSVGPaintingProperty if we
1.74 + // reference another gradient and we don't have a property. Return
1.75 + // the referenced gradient's frame if available, null otherwise.
1.76 + nsSVGGradientFrame* GetReferencedGradient();
1.77 +
1.78 + // Optionally get a stop frame (returns stop index/count)
1.79 + void GetStopFrames(nsTArray<nsIFrame*>* aStopFrames);
1.80 +
1.81 + const mozilla::nsSVGAnimatedTransformList* GetGradientTransformList(
1.82 + nsIContent* aDefault);
1.83 + // Will be singular for gradientUnits="objectBoundingBox" with an empty bbox.
1.84 + gfxMatrix GetGradientTransform(nsIFrame *aSource,
1.85 + const gfxRect *aOverrideBounds);
1.86 +
1.87 +protected:
1.88 + virtual bool GradientVectorLengthIsZero() = 0;
1.89 + virtual already_AddRefed<gfxPattern> CreateGradient() = 0;
1.90 +
1.91 + // Internal methods for handling referenced gradients
1.92 + class AutoGradientReferencer;
1.93 + nsSVGGradientFrame* GetReferencedGradientIfNotInUse();
1.94 +
1.95 + // Accessors to lookup gradient attributes
1.96 + uint16_t GetEnumValue(uint32_t aIndex, nsIContent *aDefault);
1.97 + uint16_t GetEnumValue(uint32_t aIndex)
1.98 + {
1.99 + return GetEnumValue(aIndex, mContent);
1.100 + }
1.101 + uint16_t GetGradientUnits();
1.102 + uint16_t GetSpreadMethod();
1.103 +
1.104 + // Gradient-type-specific lookups since the length values differ between
1.105 + // linear and radial gradients
1.106 + virtual mozilla::dom::SVGLinearGradientElement * GetLinearGradientWithLength(
1.107 + uint32_t aIndex, mozilla::dom::SVGLinearGradientElement* aDefault);
1.108 + virtual mozilla::dom::SVGRadialGradientElement * GetRadialGradientWithLength(
1.109 + uint32_t aIndex, mozilla::dom::SVGRadialGradientElement* aDefault);
1.110 +
1.111 + // The frame our gradient is (currently) being applied to
1.112 + nsIFrame* mSource;
1.113 +
1.114 +private:
1.115 + // Flag to mark this frame as "in use" during recursive calls along our
1.116 + // gradient's reference chain so we can detect reference loops. See:
1.117 + // http://www.w3.org/TR/SVG11/pservers.html#LinearGradientElementHrefAttribute
1.118 + bool mLoopFlag;
1.119 + // Gradients often don't reference other gradients, so here we cache
1.120 + // the fact that that isn't happening.
1.121 + bool mNoHRefURI;
1.122 +};
1.123 +
1.124 +
1.125 +// -------------------------------------------------------------------------
1.126 +// Linear Gradients
1.127 +// -------------------------------------------------------------------------
1.128 +
1.129 +typedef nsSVGGradientFrame nsSVGLinearGradientFrameBase;
1.130 +
1.131 +class nsSVGLinearGradientFrame : public nsSVGLinearGradientFrameBase
1.132 +{
1.133 + friend nsIFrame* NS_NewSVGLinearGradientFrame(nsIPresShell* aPresShell,
1.134 + nsStyleContext* aContext);
1.135 +protected:
1.136 + nsSVGLinearGradientFrame(nsStyleContext* aContext) :
1.137 + nsSVGLinearGradientFrameBase(aContext) {}
1.138 +
1.139 +public:
1.140 + NS_DECL_FRAMEARENA_HELPERS
1.141 +
1.142 + // nsIFrame interface:
1.143 +#ifdef DEBUG
1.144 + virtual void Init(nsIContent* aContent,
1.145 + nsIFrame* aParent,
1.146 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.147 +#endif
1.148 +
1.149 + virtual nsIAtom* GetType() const MOZ_OVERRIDE; // frame type: nsGkAtoms::svgLinearGradientFrame
1.150 +
1.151 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.152 + nsIAtom* aAttribute,
1.153 + int32_t aModType) MOZ_OVERRIDE;
1.154 +
1.155 +#ifdef DEBUG_FRAME_DUMP
1.156 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.157 + {
1.158 + return MakeFrameName(NS_LITERAL_STRING("SVGLinearGradient"), aResult);
1.159 + }
1.160 +#endif // DEBUG
1.161 +
1.162 +protected:
1.163 + float GetLengthValue(uint32_t aIndex);
1.164 + virtual mozilla::dom::SVGLinearGradientElement* GetLinearGradientWithLength(
1.165 + uint32_t aIndex, mozilla::dom::SVGLinearGradientElement* aDefault) MOZ_OVERRIDE;
1.166 + virtual bool GradientVectorLengthIsZero() MOZ_OVERRIDE;
1.167 + virtual already_AddRefed<gfxPattern> CreateGradient() MOZ_OVERRIDE;
1.168 +};
1.169 +
1.170 +// -------------------------------------------------------------------------
1.171 +// Radial Gradients
1.172 +// -------------------------------------------------------------------------
1.173 +
1.174 +typedef nsSVGGradientFrame nsSVGRadialGradientFrameBase;
1.175 +
1.176 +class nsSVGRadialGradientFrame : public nsSVGRadialGradientFrameBase
1.177 +{
1.178 + friend nsIFrame* NS_NewSVGRadialGradientFrame(nsIPresShell* aPresShell,
1.179 + nsStyleContext* aContext);
1.180 +protected:
1.181 + nsSVGRadialGradientFrame(nsStyleContext* aContext) :
1.182 + nsSVGRadialGradientFrameBase(aContext) {}
1.183 +
1.184 +public:
1.185 + NS_DECL_FRAMEARENA_HELPERS
1.186 +
1.187 + // nsIFrame interface:
1.188 +#ifdef DEBUG
1.189 + virtual void Init(nsIContent* aContent,
1.190 + nsIFrame* aParent,
1.191 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.192 +#endif
1.193 +
1.194 + virtual nsIAtom* GetType() const MOZ_OVERRIDE; // frame type: nsGkAtoms::svgRadialGradientFrame
1.195 +
1.196 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.197 + nsIAtom* aAttribute,
1.198 + int32_t aModType) MOZ_OVERRIDE;
1.199 +
1.200 +#ifdef DEBUG_FRAME_DUMP
1.201 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.202 + {
1.203 + return MakeFrameName(NS_LITERAL_STRING("SVGRadialGradient"), aResult);
1.204 + }
1.205 +#endif // DEBUG
1.206 +
1.207 +protected:
1.208 + float GetLengthValue(uint32_t aIndex);
1.209 + float GetLengthValue(uint32_t aIndex, float aDefaultValue);
1.210 + float GetLengthValueFromElement(uint32_t aIndex,
1.211 + mozilla::dom::SVGRadialGradientElement& aElement);
1.212 + virtual mozilla::dom::SVGRadialGradientElement* GetRadialGradientWithLength(
1.213 + uint32_t aIndex, mozilla::dom::SVGRadialGradientElement* aDefault) MOZ_OVERRIDE;
1.214 + virtual bool GradientVectorLengthIsZero() MOZ_OVERRIDE;
1.215 + virtual already_AddRefed<gfxPattern> CreateGradient() MOZ_OVERRIDE;
1.216 +};
1.217 +
1.218 +#endif // __NS_SVGGRADIENTFRAME_H__
1.219 +
