зеркало из https://github.com/mozilla/gecko-dev.git
203 строки
6.8 KiB
C++
203 строки
6.8 KiB
C++
/* -*- 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 LAYOUT_SVG_SVGGRADIENTFRAME_H_
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#define LAYOUT_SVG_SVGGRADIENTFRAME_H_
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#include "mozilla/Attributes.h"
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#include "mozilla/SVGPaintServerFrame.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 "nsCSSRenderingGradients.h"
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#include "nsIFrame.h"
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#include "nsLiteralString.h"
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class gfxPattern;
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class nsAtom;
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class nsIContent;
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namespace mozilla {
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class PresShell;
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class SVGAnimatedTransformList;
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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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nsIFrame* NS_NewSVGLinearGradientFrame(mozilla::PresShell* aPresShell,
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mozilla::ComputedStyle* aStyle);
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nsIFrame* NS_NewSVGRadialGradientFrame(mozilla::PresShell* aPresShell,
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mozilla::ComputedStyle* aStyle);
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namespace mozilla {
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class SVGGradientFrame : public SVGPaintServerFrame {
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using ExtendMode = gfx::ExtendMode;
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protected:
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SVGGradientFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
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ClassID aID);
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public:
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NS_DECL_ABSTRACT_FRAME(SVGGradientFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_QUERYFRAME_TARGET(SVGGradientFrame)
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// SVGPaintServerFrame methods:
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already_AddRefed<gfxPattern> GetPaintServerPattern(
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nsIFrame* aSource, const DrawTarget* aDrawTarget,
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const gfxMatrix& aContextMatrix, StyleSVGPaint nsStyleSVG::*aFillOrStroke,
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float aGraphicOpacity, imgDrawingParams& aImgParams,
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const gfxRect* aOverrideBounds) override;
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// nsIFrame interface:
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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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nsresult GetFrameName(nsAString& aResult) const override {
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return MakeFrameName(u"SVGGradient"_ns, aResult);
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}
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#endif // DEBUG
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private:
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/**
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* Parses this frame's href and - if it references another gradient - returns
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* it. It also makes this frame a rendering observer of the specified ID.
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*/
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SVGGradientFrame* GetReferencedGradient();
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void GetStops(nsTArray<ColorStop>* aStops, float aGraphicOpacity);
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SVGGradientFrame* GetGradientTransformFrame(SVGGradientFrame* 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 dom::SVGLinearGradientElement* GetLinearGradientWithLength(
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uint32_t aIndex, dom::SVGLinearGradientElement* aDefault);
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virtual dom::SVGRadialGradientElement* GetRadialGradientWithLength(
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uint32_t aIndex, 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 SVGLinearGradientFrame final : public SVGGradientFrame {
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friend nsIFrame* ::NS_NewSVGLinearGradientFrame(
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mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
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protected:
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explicit SVGLinearGradientFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: SVGGradientFrame(aStyle, aPresContext, kClassID) {}
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(SVGLinearGradientFrame)
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// nsIFrame interface:
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#ifdef DEBUG
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void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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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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nsresult GetFrameName(nsAString& aResult) const override {
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return MakeFrameName(u"SVGLinearGradient"_ns, 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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mozilla::dom::SVGLinearGradientElement* GetLinearGradientWithLength(
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uint32_t aIndex,
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mozilla::dom::SVGLinearGradientElement* aDefault) override;
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bool GradientVectorLengthIsZero() override;
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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 SVGRadialGradientFrame final : public SVGGradientFrame {
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friend nsIFrame* ::NS_NewSVGRadialGradientFrame(
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mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
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protected:
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explicit SVGRadialGradientFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: SVGGradientFrame(aStyle, aPresContext, kClassID) {}
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(SVGRadialGradientFrame)
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// nsIFrame interface:
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#ifdef DEBUG
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void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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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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nsresult GetFrameName(nsAString& aResult) const override {
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return MakeFrameName(u"SVGRadialGradient"_ns, 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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mozilla::dom::SVGRadialGradientElement* GetRadialGradientWithLength(
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uint32_t aIndex,
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mozilla::dom::SVGRadialGradientElement* aDefault) override;
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bool GradientVectorLengthIsZero() override;
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already_AddRefed<gfxPattern> CreateGradient() override;
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};
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} // namespace mozilla
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#endif // LAYOUT_SVG_SVGGRADIENTFRAME_H_
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