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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 LAYOUT_SVG_SVGGRADIENTFRAME_H_
#define LAYOUT_SVG_SVGGRADIENTFRAME_H_
#include "mozilla/Attributes.h"
#include "mozilla/SVGPaintServerFrame.h"
#include "gfxMatrix.h"
#include "gfxRect.h"
#include "nsCOMPtr.h"
#include "nsIFrame.h"
#include "nsLiteralString.h"
class gfxPattern;
class nsAtom;
class nsIContent;
namespace mozilla {
class PresShell;
class SVGAnimatedTransformList;
namespace dom {
class SVGLinearGradientElement;
class SVGRadialGradientElement;
} // namespace dom
} // namespace mozilla
nsIFrame* NS_NewSVGLinearGradientFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
nsIFrame* NS_NewSVGRadialGradientFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGGradientFrame : public SVGPaintServerFrame {
using ExtendMode = gfx::ExtendMode;
protected:
SVGGradientFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
ClassID aID);
public:
NS_DECL_ABSTRACT_FRAME(SVGGradientFrame)
NS_DECL_QUERYFRAME
NS_DECL_QUERYFRAME_TARGET(SVGGradientFrame)
// SVGPaintServerFrame methods:
already_AddRefed<gfxPattern> GetPaintServerPattern(
nsIFrame* aSource, const DrawTarget* aDrawTarget,
const gfxMatrix& aContextMatrix, StyleSVGPaint nsStyleSVG::*aFillOrStroke,
float aGraphicOpacity, imgDrawingParams& aImgParams,
const gfxRect* aOverrideBounds) override;
// nsIFrame interface:
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGGradient"_ns, aResult);
}
#endif // DEBUG
private:
/**
* Parses this frame's href and - if it references another gradient - returns
* it. It also makes this frame a rendering observer of the specified ID.
*/
SVGGradientFrame* GetReferencedGradient();
// Optionally get a stop frame (returns stop index/count)
void GetStopFrames(nsTArray<nsIFrame*>* aStopFrames);
const SVGAnimatedTransformList* 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;
// 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 dom::SVGLinearGradientElement* GetLinearGradientWithLength(
uint32_t aIndex, dom::SVGLinearGradientElement* aDefault);
virtual dom::SVGRadialGradientElement* GetRadialGradientWithLength(
uint32_t aIndex, 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 SVGLinearGradientFrame final : public SVGGradientFrame {
friend nsIFrame* ::NS_NewSVGLinearGradientFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
protected:
explicit SVGLinearGradientFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: SVGGradientFrame(aStyle, aPresContext, kClassID) {}
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(SVGLinearGradientFrame)
// nsIFrame interface:
#ifdef DEBUG
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGLinearGradient"_ns, aResult);
}
#endif // DEBUG
protected:
float GetLengthValue(uint32_t aIndex);
mozilla::dom::SVGLinearGradientElement* GetLinearGradientWithLength(
uint32_t aIndex,
mozilla::dom::SVGLinearGradientElement* aDefault) override;
bool GradientVectorLengthIsZero() override;
already_AddRefed<gfxPattern> CreateGradient() override;
};
// -------------------------------------------------------------------------
// Radial Gradients
// -------------------------------------------------------------------------
class SVGRadialGradientFrame final : public SVGGradientFrame {
friend nsIFrame* ::NS_NewSVGRadialGradientFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
protected:
explicit SVGRadialGradientFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: SVGGradientFrame(aStyle, aPresContext, kClassID) {}
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(SVGRadialGradientFrame)
// nsIFrame interface:
#ifdef DEBUG
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGRadialGradient"_ns, 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);
mozilla::dom::SVGRadialGradientElement* GetRadialGradientWithLength(
uint32_t aIndex,
mozilla::dom::SVGRadialGradientElement* aDefault) override;
bool GradientVectorLengthIsZero() override;
already_AddRefed<gfxPattern> CreateGradient() override;
};
} // namespace mozilla
#endif // LAYOUT_SVG_SVGGRADIENTFRAME_H_
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