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e74f1cd513
In order to facilitate the movement of code with side-effects called by Element::SetAttr to Element::BeforeSetAttr and Element::AfterSetAttr, Element::AfterSetAttr should have access to the old value of the attribute. This includes information about whether there was previously a value set or not. Accomplishing this involved passing an additional argument through functions that find and change the old attribute value in order to ensure that we can differentiate between an empty old value and an absent old value (attribute was not set). Note that while I tried to ensure that accurate values (and their absence) are reported to Element::AfterSetAttr, I largely ignored SVG. While the old value reported for SVG values should be however accurate the value already being reported to SetAttrAndNotify was, SVG elements do not currently report unset values properly because they will never pass a null pointer to SetAttrAndNotify. MozReview-Commit-ID: K1mha8CNFZP --HG-- extra : rebase_source : 42776eb01451d371e4aebcc17fe3dd112c8d268b
110 lines
3.8 KiB
C++
110 lines
3.8 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 mozilla_dom_SVGImageElement_h
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#define mozilla_dom_SVGImageElement_h
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#include "nsImageLoadingContent.h"
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#include "nsSVGLength2.h"
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#include "nsSVGString.h"
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#include "SVGGeometryElement.h"
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#include "SVGAnimatedPreserveAspectRatio.h"
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nsresult NS_NewSVGImageElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
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class nsSVGImageFrame;
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namespace mozilla {
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namespace dom {
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class DOMSVGAnimatedPreserveAspectRatio;
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typedef SVGGeometryElement SVGImageElementBase;
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class SVGImageElement : public SVGImageElementBase,
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public nsImageLoadingContent
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{
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friend class ::nsSVGImageFrame;
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protected:
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explicit SVGImageElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
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virtual ~SVGImageElement();
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virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
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friend nsresult (::NS_NewSVGImageElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
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public:
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// interfaces:
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NS_DECL_ISUPPORTS_INHERITED
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// EventTarget
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virtual void AsyncEventRunning(AsyncEventDispatcher* aEvent) override;
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// nsIContent interface
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virtual nsresult AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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bool aNotify) override;
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virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers) override;
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virtual void UnbindFromTree(bool aDeep, bool aNullParent) override;
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virtual EventStates IntrinsicState() const override;
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NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* name) const override;
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// SVGGeometryElement methods:
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virtual bool GetGeometryBounds(Rect* aBounds, const StrokeOptions& aStrokeOptions,
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const Matrix& aToBoundsSpace,
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const Matrix* aToNonScalingStrokeSpace = nullptr) override;
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virtual already_AddRefed<Path> BuildPath(PathBuilder* aBuilder) override;
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// nsSVGSVGElement methods:
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virtual bool HasValidDimensions() const override;
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virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,
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bool aPreallocateChildren) const override;
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nsresult CopyInnerTo(mozilla::dom::Element* aDest, bool aPreallocateChildren);
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void MaybeLoadSVGImage();
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// WebIDL
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already_AddRefed<SVGAnimatedLength> X();
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already_AddRefed<SVGAnimatedLength> Y();
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already_AddRefed<SVGAnimatedLength> Width();
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already_AddRefed<SVGAnimatedLength> Height();
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already_AddRefed<DOMSVGAnimatedPreserveAspectRatio> PreserveAspectRatio();
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already_AddRefed<SVGAnimatedString> Href();
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protected:
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nsresult LoadSVGImage(bool aForce, bool aNotify);
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virtual LengthAttributesInfo GetLengthInfo() override;
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virtual SVGAnimatedPreserveAspectRatio *GetPreserveAspectRatio() override;
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virtual StringAttributesInfo GetStringInfo() override;
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// Override for nsImageLoadingContent.
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nsIContent* AsContent() override { return this; }
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enum { ATTR_X, ATTR_Y, ATTR_WIDTH, ATTR_HEIGHT };
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nsSVGLength2 mLengthAttributes[4];
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static LengthInfo sLengthInfo[4];
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SVGAnimatedPreserveAspectRatio mPreserveAspectRatio;
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enum { HREF, XLINK_HREF };
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nsSVGString mStringAttributes[2];
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static StringInfo sStringInfo[2];
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_SVGImageElement_h
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