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64 lines
2.0 KiB
C++
64 lines
2.0 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 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 "nsTArray.h"
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#include "mozilla/StaticPtr.h"
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class nsAString;
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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
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{
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public:
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virtual ~nsNameSpaceManager() {}
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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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nsIAtom* NameSpaceURIAtom(int32_t aNameSpaceID) {
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MOZ_ASSERT(aNameSpaceID > 0 && (int64_t) aNameSpaceID <= (int64_t) mURIArray.Length());
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return mURIArray.ElementAt(aNameSpaceID - 1); // id is index + 1
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}
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virtual int32_t GetNameSpaceID(const nsAString& aURI);
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virtual bool HasElementCreator(int32_t aNameSpaceID);
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static nsNameSpaceManager* GetInstance();
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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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nsDataHashtable<nsISupportsHashKey, int32_t> mURIToIDTable;
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nsTArray<nsCOMPtr<nsIAtom>> mURIArray;
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static mozilla::StaticAutoPtr<nsNameSpaceManager> sInstance;
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};
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#endif // nsNameSpaceManager_h___
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