gecko-dev/dom/base/nsNameSpaceManager.h
Nicholas Nethercote d225f7151b Bug 1400460 - Rename nsIAtom as nsAtom. r=hiro.
(Path is actually r=froydnj.)

Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of
nsISupports. This means that nsAtom is now a better name for it than nsIAtom.

MozReview-Commit-ID: 91U22X2NydP

--HG--
rename : xpcom/ds/nsIAtom.h => xpcom/ds/nsAtom.h
extra : rebase_source : ac3e904a21b8b48e74534fff964f1623ee937c67
2017-10-03 09:05:19 +11:00

84 lines
2.8 KiB
C++

/* -*- 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 "nsAtom.h"
#include "nsIDocument.h"
#include "nsIObserver.h"
#include "nsStringFwd.h"
#include "nsTArray.h"
#include "mozilla/StaticPtr.h"
/**
* 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);
nsAtom* 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.
nsAtom* 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(nsAtom* aURI,
bool aInChromeDoc);
bool HasElementCreator(int32_t aNameSpaceID);
static nsNameSpaceManager* GetInstance();
bool mMathMLDisabled;
bool mSVGDisabled;
private:
bool Init();
nsresult AddNameSpace(already_AddRefed<nsAtom> aURI, const int32_t aNameSpaceID);
nsresult AddDisabledNameSpace(already_AddRefed<nsAtom> aURI, const int32_t aNameSpaceID);
~nsNameSpaceManager() {};
nsDataHashtable<nsRefPtrHashKey<nsAtom>, int32_t> mURIToIDTable;
nsDataHashtable<nsRefPtrHashKey<nsAtom>, int32_t> mDisabledURIToIDTable;
nsTArray<RefPtr<nsAtom>> mURIArray;
static mozilla::StaticRefPtr<nsNameSpaceManager> sInstance;
};
#endif // nsNameSpaceManager_h___