forked from mirrors/gecko-dev
ad01a10a3b
Note that this patch only transforms the use of the nsDataHashtable type alias to a directly equivalent use of nsTHashMap. It does not change the specification of the hash key type to make use of the key class deduction that nsTHashMap allows for in some cases. That can be done in a separate step, but requires more attention. Differential Revision: https://phabricator.services.mozilla.com/D106008
84 lines
3 KiB
C++
84 lines
3 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 "nsTHashMap.h"
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#include "nsHashKeys.h"
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#include "nsAtom.h"
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#include "nsStringFwd.h"
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#include "nsTArray.h"
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#include "mozilla/StaticPtr.h"
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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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public:
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NS_INLINE_DECL_REFCOUNTING(nsNameSpaceManager)
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virtual nsresult RegisterNameSpace(const nsAString& aURI,
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int32_t& aNameSpaceID);
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nsresult RegisterNameSpace(already_AddRefed<nsAtom> 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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//
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// NB: The requirement of mapping from the first entry to the empty atom is
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// necessary for Servo, though it can be removed if needed adding a branch in
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// GeckoElement::get_namespace().
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nsAtom* NameSpaceURIAtom(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, bool aInChromeDoc);
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int32_t GetNameSpaceID(nsAtom* aURI, bool aInChromeDoc);
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static const char* GetNameSpaceDisplayName(uint32_t aNameSpaceID);
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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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bool mSVGDisabled;
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private:
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static void PrefChanged(const char* aPref, void* aSelf);
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void PrefChanged(const char* aPref);
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bool Init();
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nsresult AddNameSpace(already_AddRefed<nsAtom> aURI,
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const int32_t aNameSpaceID);
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nsresult AddDisabledNameSpace(already_AddRefed<nsAtom> aURI,
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const int32_t aNameSpaceID);
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~nsNameSpaceManager() = default;
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nsTHashMap<nsRefPtrHashKey<nsAtom>, int32_t> mURIToIDTable;
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nsTHashMap<nsRefPtrHashKey<nsAtom>, int32_t> mDisabledURIToIDTable;
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nsTArray<RefPtr<nsAtom>> 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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