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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
117 lines
3.6 KiB
C++
117 lines
3.6 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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/*
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* Implementation of DOM Core's nsIDOMAttr node.
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*/
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#ifndef mozilla_dom_Attr_h
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#define mozilla_dom_Attr_h
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#include "mozilla/Attributes.h"
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#include "nsIAttribute.h"
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#include "nsIDOMAttr.h"
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#include "nsIDOMText.h"
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#include "nsIDOMNodeList.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsStubMutationObserver.h"
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class nsIDocument;
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namespace mozilla {
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class EventChainPreVisitor;
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namespace dom {
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// Attribute helper class used to wrap up an attribute with a dom
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// object that implements nsIDOMAttr and nsIDOMNode
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class Attr final : public nsIAttribute,
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public nsIDOMAttr
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{
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virtual ~Attr() {}
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public:
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Attr(nsDOMAttributeMap* aAttrMap,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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const nsAString& aValue);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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// nsIDOMNode interface
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NS_FORWARD_NSIDOMNODE_TO_NSINODE
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virtual void GetTextContentInternal(nsAString& aTextContent,
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OOMReporter& aError) override;
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virtual void SetTextContentInternal(const nsAString& aTextContent,
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ErrorResult& aError) override;
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virtual void GetNodeValueInternal(nsAString& aNodeValue) override;
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virtual void SetNodeValueInternal(const nsAString& aNodeValue,
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ErrorResult& aError) override;
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// nsIDOMAttr interface
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NS_DECL_NSIDOMATTR
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virtual nsresult GetEventTargetParent(EventChainPreVisitor& aVisitor) override;
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// nsIAttribute interface
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void SetMap(nsDOMAttributeMap *aMap) override;
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Element* GetElement() const;
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nsresult SetOwnerDocument(nsIDocument* aDocument) override;
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// nsINode interface
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virtual bool IsNodeOfType(uint32_t aFlags) const override;
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virtual uint32_t GetChildCount() const override;
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virtual nsIContent *GetChildAt(uint32_t aIndex) const override;
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virtual nsIContent * const * GetChildArray(uint32_t* aChildCount) const override;
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virtual int32_t IndexOf(const nsINode* aPossibleChild) const override;
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virtual nsresult InsertChildAt(nsIContent* aKid, uint32_t aIndex,
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bool aNotify) override;
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virtual void RemoveChildAt(uint32_t aIndex, bool aNotify) 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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virtual already_AddRefed<nsIURI> GetBaseURI(bool aTryUseXHRDocBaseURI = false) const override;
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static void Initialize();
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static void Shutdown();
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NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Attr,
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nsIAttribute)
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virtual nsIDOMNode* AsDOMNode() override { return this; }
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// WebIDL
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virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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// XPCOM GetName() is OK
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// XPCOM GetValue() is OK
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void SetValue(const nsAString& aValue, ErrorResult& aRv);
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bool Specified() const;
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// XPCOM GetNamespaceURI() is OK
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// XPCOM GetPrefix() is OK
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// XPCOM GetLocalName() is OK
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Element* GetOwnerElement(ErrorResult& aRv);
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protected:
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virtual Element* GetNameSpaceElement() override
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{
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return GetElement();
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}
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static bool sInitialized;
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private:
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nsString mValue;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_Attr_h */
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