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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsIObserver.h"
#include "nsTArray.h"
#include "mozilla/StaticPtr.h"
class nsAString;
class nsIDocument;
/**
* 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___
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