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230 lines
8.4 KiB
C++
230 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SVG project.
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*
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* The Initial Developer of the Original Code is
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* Scooter Morris.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Scooter Morris <scootermorris@comcast.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __NS_SVGGRADIENTFRAME_H__
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#define __NS_SVGGRADIENTFRAME_H__
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#include "nsSVGPaintServerFrame.h"
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#include "nsWeakReference.h"
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#include "nsSVGElement.h"
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#include "gfxPattern.h"
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class nsIDOMSVGStopElement;
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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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protected:
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nsSVGGradientFrame(nsStyleContext* aContext);
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public:
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NS_DECL_FRAMEARENA_HELPERS
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// nsSVGPaintServerFrame methods:
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virtual PRBool SetupPaintServer(gfxContext *aContext,
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nsSVGGeometryFrame *aSource,
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float aGraphicOpacity);
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// nsIFrame interface:
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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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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// Helpers to look at our gradient and then along its reference chain (if any)
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// to find the first gradient with the specified attribute.
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// Returns aDefault if no content with that attribute is found
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nsSVGGradientElement* GetGradientWithAttr(nsIAtom *aAttrName, nsIContent *aDefault);
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// Some attributes are only valid on one type of gradient, and we *must* get
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// the right type or we won't have the data structures we require.
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// Returns aDefault if no content with that attribute is found
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nsSVGGradientElement* GetGradientWithAttr(nsIAtom *aAttrName, nsIAtom *aGradType,
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nsIContent *aDefault);
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// Optionally get a stop frame (returns stop index/count)
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PRInt32 GetStopFrame(PRInt32 aIndex, nsIFrame * *aStopFrame);
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PRUint16 GetSpreadMethod();
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PRUint32 GetStopCount();
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void GetStopInformation(PRInt32 aIndex,
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float *aOffset, nscolor *aColor, float *aStopOpacity);
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// Will be singular for gradientUnits="objectBoundingBox" with an empty bbox.
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gfxMatrix GetGradientTransform(nsSVGGeometryFrame *aSource);
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protected:
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virtual already_AddRefed<gfxPattern> CreateGradient() = 0;
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// Use these inline methods instead of GetGradientWithAttr(..., aGradType)
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nsSVGLinearGradientElement* GetLinearGradientWithAttr(nsIAtom *aAttrName, nsIContent *aDefault)
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{
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return static_cast<nsSVGLinearGradientElement*>(
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GetGradientWithAttr(aAttrName, nsGkAtoms::svgLinearGradientFrame, aDefault));
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}
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nsSVGRadialGradientElement* GetRadialGradientWithAttr(nsIAtom *aAttrName, nsIContent *aDefault)
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{
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return static_cast<nsSVGRadialGradientElement*>(
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GetGradientWithAttr(aAttrName, nsGkAtoms::svgRadialGradientFrame, aDefault));
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}
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// Get the value of our gradientUnits attribute
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PRUint16 GetGradientUnits();
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// The graphic element our gradient is (currently) being applied to
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nsRefPtr<nsSVGElement> mSourceContent;
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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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PRPackedBool 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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PRPackedBool 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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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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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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#endif
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virtual nsIAtom* GetType() const; // frame type: nsGkAtoms::svgLinearGradientFrame
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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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 GradientLookupAttribute(nsIAtom *aAtomName, PRUint16 aEnumName);
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virtual already_AddRefed<gfxPattern> CreateGradient();
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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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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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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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#endif
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virtual nsIAtom* GetType() const; // frame type: nsGkAtoms::svgRadialGradientFrame
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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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 GradientLookupAttribute(nsIAtom *aAtomName, PRUint16 aEnumName,
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nsSVGRadialGradientElement *aElement = nsnull);
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virtual already_AddRefed<gfxPattern> CreateGradient();
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};
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#endif // __NS_SVGGRADIENTFRAME_H__
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