83 lines
2.8 KiB
C++
83 lines
2.8 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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#ifndef nsNameSpaceManager_h___
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#define nsNameSpaceManager_h___
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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#include "nsIAtom.h"
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#include "nsIObserver.h"
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#include "nsTArray.h"
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#include "mozilla/StaticPtr.h"
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class nsAString;
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class nsIDocument;
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/**
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* The Name Space Manager tracks the association between a NameSpace
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* URI and the int32_t runtime id. Mappings between NameSpaces and
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* NameSpace prefixes are managed by nsINameSpaces.
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*
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* All NameSpace URIs are stored in a global table so that IDs are
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* consistent accross the app. NameSpace IDs are only consistent at runtime
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* ie: they are not guaranteed to be consistent accross app sessions.
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*
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* The nsNameSpaceManager needs to have a live reference for as long as
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* the NameSpace IDs are needed.
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*
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*/
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class nsNameSpaceManager final : public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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virtual nsresult RegisterNameSpace(const nsAString& aURI,
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int32_t& aNameSpaceID);
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virtual nsresult GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI);
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// Returns the atom for the namespace URI associated with the given ID. The
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// ID must be within range and not be kNameSpaceID_None (i.e. zero);
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nsIAtom* NameSpaceURIAtom(int32_t aNameSpaceID) {
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MOZ_ASSERT(aNameSpaceID > 0);
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return NameSpaceURIAtomForServo(aNameSpaceID);
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}
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// NB: This function should only be called by Servo code (and the above
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// accessor), which uses the empty atom to represent kNameSpaceID_None.
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nsIAtom* NameSpaceURIAtomForServo(int32_t aNameSpaceID) {
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MOZ_ASSERT(aNameSpaceID >= 0);
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MOZ_ASSERT((int64_t) aNameSpaceID < (int64_t) mURIArray.Length());
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return mURIArray.ElementAt(aNameSpaceID);
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}
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int32_t GetNameSpaceID(const nsAString& aURI,
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bool aInChromeDoc);
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int32_t GetNameSpaceID(nsIAtom* aURI,
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bool aInChromeDoc);
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bool HasElementCreator(int32_t aNameSpaceID);
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static nsNameSpaceManager* GetInstance();
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bool mMathMLDisabled;
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private:
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bool Init();
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nsresult AddNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID);
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nsresult AddDisabledNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID);
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~nsNameSpaceManager() {};
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nsDataHashtable<nsISupportsHashKey, int32_t> mURIToIDTable;
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nsDataHashtable<nsISupportsHashKey, int32_t> mDisabledURIToIDTable;
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nsTArray<nsCOMPtr<nsIAtom>> mURIArray;
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static mozilla::StaticRefPtr<nsNameSpaceManager> sInstance;
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};
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#endif // nsNameSpaceManager_h___
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