зеркало из https://github.com/mozilla/gecko-dev.git
140 строки
4.7 KiB
C++
140 строки
4.7 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_SVGUseElement_h
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#define mozilla_dom_SVGUseElement_h
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#include "mozilla/dom/FromParser.h"
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#include "mozilla/dom/IDTracker.h"
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#include "nsStubMutationObserver.h"
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#include "mozilla/dom/SVGGraphicsElement.h"
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#include "nsSVGLength2.h"
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#include "nsSVGString.h"
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#include "nsTArray.h"
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class nsIContent;
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class nsSVGUseFrame;
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nsresult
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NS_NewSVGSVGElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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mozilla::dom::FromParser aFromParser);
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nsresult NS_NewSVGUseElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
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namespace mozilla {
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struct URLExtraData;
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namespace dom {
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typedef SVGGraphicsElement SVGUseElementBase;
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class SVGUseElement final : public SVGUseElementBase,
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public nsStubMutationObserver
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{
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friend class ::nsSVGUseFrame;
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protected:
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friend nsresult (::NS_NewSVGUseElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
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explicit SVGUseElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
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virtual ~SVGUseElement();
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virtual JSObject* WrapNode(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;
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public:
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// interfaces:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGUseElement, SVGUseElementBase)
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NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
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NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
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// for nsSVGUseFrame's nsIAnonymousContentCreator implementation.
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already_AddRefed<nsIContent> CreateAnonymousContent();
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// nsSVGElement specializations:
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virtual gfxMatrix PrependLocalTransformsTo(
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const gfxMatrix &aMatrix,
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SVGTransformTypes aWhich = eAllTransforms) const override;
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virtual bool HasValidDimensions() const override;
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// nsIContent interface
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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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NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
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// WebIDL
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already_AddRefed<SVGAnimatedString> Href();
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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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nsIURI* GetSourceDocURI();
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URLExtraData* GetContentURLData() const { return mContentURLData; }
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protected:
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/**
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* Helper that provides a reference to the element with the ID that is
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* referenced by the 'use' element's 'href' attribute, and that will update
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* the 'use' element if the element that that ID identifies changes to a
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* different element (or none).
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*/
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class ElementTracker final : public IDTracker {
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public:
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explicit ElementTracker(SVGUseElement* aOwningUseElement)
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: mOwningUseElement(aOwningUseElement)
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{}
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protected:
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virtual void ElementChanged(Element* aFrom, Element* aTo) override {
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IDTracker::ElementChanged(aFrom, aTo);
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if (aFrom) {
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aFrom->RemoveMutationObserver(mOwningUseElement);
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}
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mOwningUseElement->TriggerReclone();
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}
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private:
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SVGUseElement* mOwningUseElement;
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};
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nsSVGUseFrame* GetFrame() const;
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virtual LengthAttributesInfo GetLengthInfo() override;
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virtual StringAttributesInfo GetStringInfo() override;
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/**
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* Returns true if our width and height should be used, or false if they
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* should be ignored. As per the spec, this depends on the type of the
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* element that we're referencing.
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*/
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bool OurWidthAndHeightAreUsed() const;
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void SyncWidthOrHeight(nsAtom *aName);
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void LookupHref();
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void TriggerReclone();
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void UnlinkSource();
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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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enum { HREF, XLINK_HREF };
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nsSVGString mStringAttributes[2];
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static StringInfo sStringInfo[2];
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nsCOMPtr<nsIContent> mOriginal; // if we've been cloned, our "real" copy
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ElementTracker mReferencedElementTracker;
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RefPtr<URLExtraData> mContentURLData; // URL data for its anonymous content
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_SVGUseElement_h
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