/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsNameSpaceManager_h___ #define nsNameSpaceManager_h___ #include "nsDataHashtable.h" #include "nsHashKeys.h" #include "nsIAtom.h" #include "nsIDocument.h" #include "nsIObserver.h" #include "nsTArray.h" #include "mozilla/StaticPtr.h" class nsAString; /** * The Name Space Manager tracks the association between a NameSpace * URI and the int32_t runtime id. Mappings between NameSpaces and * NameSpace prefixes are managed by nsINameSpaces. * * All NameSpace URIs are stored in a global table so that IDs are * consistent accross the app. NameSpace IDs are only consistent at runtime * ie: they are not guaranteed to be consistent accross app sessions. * * The nsNameSpaceManager needs to have a live reference for as long as * the NameSpace IDs are needed. * */ class nsNameSpaceManager final : public nsIObserver { public: NS_DECL_ISUPPORTS NS_DECL_NSIOBSERVER virtual nsresult RegisterNameSpace(const nsAString& aURI, int32_t& aNameSpaceID); virtual nsresult GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI); // Returns the atom for the namespace URI associated with the given ID. The // ID must be within range and not be kNameSpaceID_None (i.e. zero); nsIAtom* NameSpaceURIAtom(int32_t aNameSpaceID) { MOZ_ASSERT(aNameSpaceID > 0); return NameSpaceURIAtomForServo(aNameSpaceID); } // NB: This function should only be called by Servo code (and the above // accessor), which uses the empty atom to represent kNameSpaceID_None. nsIAtom* NameSpaceURIAtomForServo(int32_t aNameSpaceID) { MOZ_ASSERT(aNameSpaceID >= 0); MOZ_ASSERT((int64_t) aNameSpaceID < (int64_t) mURIArray.Length()); return mURIArray.ElementAt(aNameSpaceID); } int32_t GetNameSpaceID(const nsAString& aURI, bool aInChromeDoc); int32_t GetNameSpaceID(nsIAtom* aURI, bool aInChromeDoc); bool HasElementCreator(int32_t aNameSpaceID); static nsNameSpaceManager* GetInstance(); bool mMathMLDisabled; private: bool Init(); nsresult AddNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID); nsresult AddDisabledNameSpace(already_AddRefed<nsIAtom> aURI, const int32_t aNameSpaceID); ~nsNameSpaceManager() {}; nsDataHashtable<nsISupportsHashKey, int32_t> mURIToIDTable; nsDataHashtable<nsISupportsHashKey, int32_t> mDisabledURIToIDTable; nsTArray<nsCOMPtr<nsIAtom>> mURIArray; static mozilla::StaticRefPtr<nsNameSpaceManager> sInstance; }; #endif // nsNameSpaceManager_h___