145 lines
4.6 KiB
C++
145 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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* A class for handing out nodeinfos and ensuring sharing of them as needed.
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*/
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#ifndef nsNodeInfoManager_h___
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#define nsNodeInfoManager_h___
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#include "mozilla/Attributes.h" // for final
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#include "nsCOMPtr.h" // for member
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#include "nsCycleCollectionParticipant.h" // for NS_DECL_CYCLE_*
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#include "plhash.h" // for typedef PLHashNumber
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class nsAString;
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class nsBindingManager;
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class nsIAtom;
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class nsIDocument;
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class nsIDOMDocumentType;
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class nsIPrincipal;
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struct PLHashEntry;
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struct PLHashTable;
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template<class T> struct already_AddRefed;
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namespace mozilla {
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namespace dom {
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class NodeInfo;
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} // namespace dom
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} // namespace mozilla
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#define RECENTLY_USED_NODEINFOS_SIZE 31
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class nsNodeInfoManager final
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{
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private:
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~nsNodeInfoManager();
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public:
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nsNodeInfoManager();
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NS_DECL_CYCLE_COLLECTION_SKIPPABLE_NATIVE_CLASS(nsNodeInfoManager)
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NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsNodeInfoManager)
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/**
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* Initialize the nodeinfo manager with a document.
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*/
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nsresult Init(nsIDocument *aDocument);
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/**
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* Release the reference to the document, this will be called when
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* the document is going away.
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*/
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void DropDocumentReference();
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/**
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* Methods for creating nodeinfo's from atoms and/or strings.
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*/
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already_AddRefed<mozilla::dom::NodeInfo>
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GetNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
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uint16_t aNodeType, nsIAtom* aExtraName = nullptr);
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nsresult GetNodeInfo(const nsAString& aName, nsIAtom *aPrefix,
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int32_t aNamespaceID, uint16_t aNodeType,
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mozilla::dom::NodeInfo** aNodeInfo);
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nsresult GetNodeInfo(const nsAString& aName, nsIAtom *aPrefix,
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const nsAString& aNamespaceURI, uint16_t aNodeType,
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mozilla::dom::NodeInfo** aNodeInfo);
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/**
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* Returns the nodeinfo for text nodes. Can return null if OOM.
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*/
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already_AddRefed<mozilla::dom::NodeInfo> GetTextNodeInfo();
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/**
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* Returns the nodeinfo for comment nodes. Can return null if OOM.
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*/
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already_AddRefed<mozilla::dom::NodeInfo> GetCommentNodeInfo();
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/**
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* Returns the nodeinfo for the document node. Can return null if OOM.
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*/
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already_AddRefed<mozilla::dom::NodeInfo> GetDocumentNodeInfo();
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/**
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* Retrieve a pointer to the document that owns this node info
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* manager.
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*/
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nsIDocument* GetDocument() const
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{
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return mDocument;
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}
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/**
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* Gets the principal of the document this nodeinfo manager belongs to.
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*/
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nsIPrincipal *DocumentPrincipal() const {
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NS_ASSERTION(mPrincipal, "How'd that happen?");
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return mPrincipal;
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}
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void RemoveNodeInfo(mozilla::dom::NodeInfo *aNodeInfo);
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nsBindingManager* GetBindingManager() const
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{
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return mBindingManager;
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}
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protected:
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friend class nsDocument;
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friend class nsXULPrototypeDocument;
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friend nsresult NS_NewDOMDocumentType(nsIDOMDocumentType** ,
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nsNodeInfoManager *,
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nsIAtom *,
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const nsAString& ,
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const nsAString& ,
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const nsAString& );
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/**
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* Sets the principal of the document this nodeinfo manager belongs to.
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*/
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void SetDocumentPrincipal(nsIPrincipal *aPrincipal);
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private:
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static int NodeInfoInnerKeyCompare(const void *key1, const void *key2);
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static PLHashNumber GetNodeInfoInnerHashValue(const void *key);
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static int DropNodeInfoDocument(PLHashEntry *he, int hashIndex,
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void *arg);
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PLHashTable *mNodeInfoHash;
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nsIDocument * MOZ_NON_OWNING_REF mDocument; // WEAK
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uint32_t mNonDocumentNodeInfos;
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nsCOMPtr<nsIPrincipal> mPrincipal; // Never null after Init() succeeds.
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nsCOMPtr<nsIPrincipal> mDefaultPrincipal; // Never null after Init() succeeds
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mozilla::dom::NodeInfo * MOZ_NON_OWNING_REF mTextNodeInfo; // WEAK to avoid circular ownership
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mozilla::dom::NodeInfo * MOZ_NON_OWNING_REF mCommentNodeInfo; // WEAK to avoid circular ownership
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mozilla::dom::NodeInfo * MOZ_NON_OWNING_REF mDocumentNodeInfo; // WEAK to avoid circular ownership
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RefPtr<nsBindingManager> mBindingManager;
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mozilla::dom::NodeInfo* mRecentlyUsedNodeInfos[RECENTLY_USED_NODEINFOS_SIZE];
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};
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#endif /* nsNodeInfoManager_h___ */
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