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7fdb378650
Currently, attribute and child arrays (implemented in dom/base/nsAttrAndChildArray.h) start out empty. When cloning, the array ends up being resized multiple times in order to add the attributes and children that are being cloned from the original node. This would be quicker if the array was initialized to the correct size in the first place so that resizes are not necessary. However, preallocating space for children is only necessary when performing a deep clone. Therefore, an additional parameter is being added to the Clone, CopyInnerTo, and CloneDocHelper methods to indicate whether preallocation of children should happen. Attributes are copied either way, so that part of the array is preallocated in both cases. MozReview-Commit-ID: 3iVezeAKXnI --HG-- extra : rebase_source : 9c3deec6d7aafd6411044d623d4863637b45fd58
111 lines
4.0 KiB
C++
111 lines
4.0 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_SVGMPathElement_h
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#define mozilla_dom_SVGMPathElement_h
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#include "nsSVGElement.h"
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#include "nsStubMutationObserver.h"
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#include "nsSVGString.h"
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#include "nsReferencedElement.h"
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nsresult NS_NewSVGMPathElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
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typedef nsSVGElement SVGMPathElementBase;
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namespace mozilla {
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namespace dom {
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class SVGPathElement;
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class SVGMPathElement final : public SVGMPathElementBase,
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public nsStubMutationObserver
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{
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protected:
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friend nsresult (::NS_NewSVGMPathElement(nsIContent **aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
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explicit SVGMPathElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
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~SVGMPathElement();
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virtual JSObject* WrapNode(JSContext *aCx, 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(SVGMPathElement,
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SVGMPathElementBase)
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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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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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 nsresult UnsetAttr(int32_t aNamespaceID, nsIAtom* aAttribute,
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bool aNotify) override;
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// Element specializations
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virtual bool ParseAttribute(int32_t aNamespaceID,
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nsIAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult) override;
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// Public helper method: If our xlink:href attribute links to a <path>
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// element, this method returns a pointer to that element. Otherwise,
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// this returns nullptr.
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SVGPathElement* GetReferencedPath();
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// WebIDL
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already_AddRefed<SVGAnimatedString> Href();
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protected:
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class PathReference : public nsReferencedElement {
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public:
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explicit PathReference(SVGMPathElement* aMpathElement) :
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mMpathElement(aMpathElement) {}
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protected:
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// We need to be notified when target changes, in order to request a sample
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// (which will clear animation effects that used the old target-path
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// and recompute the animation effects using the new target-path).
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virtual void ElementChanged(Element* aFrom, Element* aTo) override {
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nsReferencedElement::ElementChanged(aFrom, aTo);
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if (aFrom) {
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aFrom->RemoveMutationObserver(mMpathElement);
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}
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if (aTo) {
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aTo->AddMutationObserver(mMpathElement);
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}
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mMpathElement->NotifyParentOfMpathChange(mMpathElement->GetParent());
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}
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// We need to override IsPersistent to get persistent tracking (beyond the
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// first time the target changes)
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virtual bool IsPersistent() override { return true; }
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private:
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SVGMPathElement* const mMpathElement;
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};
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virtual StringAttributesInfo GetStringInfo() override;
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void UpdateHrefTarget(nsIContent* aParent, const nsAString& aHrefStr);
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void UnlinkHrefTarget(bool aNotifyParent);
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void NotifyParentOfMpathChange(nsIContent* aParent);
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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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PathReference mHrefTarget;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_SVGMPathElement_h
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