gecko-dev/layout/base/public/nsINameSpaceManager.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef nsINameSpaceManager_h___
#define nsINameSpaceManager_h___
#include "nsISupports.h"
#include "nslayout.h"
#include "nsAWritableString.h"
class nsIAtom;
class nsString;
class nsINameSpace;
#define kNameSpaceID_Unknown -1
#define kNameSpaceID_None 0
#define kNameSpaceID_XMLNS 1 // not really a namespace, but it needs to play the game
#define kNameSpaceID_XML 2
#define kNameSpaceID_HTML 3
#define kNameSpaceID_XLink 4
// 'html' is by definition bound to the namespace name "urn:w3-org-ns:HTML" XXX ???
// 'xml' is by definition bound to the namespace name "urn:Connolly:input:required" XXX
#define NS_INAMESPACEMANAGER_IID \
{ 0xa6cf90d5, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
/**
* The Name Space Manager tracks the associtation between a NameSpace
* URI and the PRInt32 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 nsINameSpaceManager needs to have a live reference for as long as
* the NameSpace IDs are needed. Generally, a document keeps a reference to
* a nsINameSpaceManager. Also, each nsINameSpace that comes from the manager
* keeps a reference to it.
*
* To create a stack of NameSpaces, call CreateRootNameSpace, and then create
* child NameSpaces from the root.
*
* The "html" and "xml" namespaces come "pre-canned" from the root.
*
*/
class nsINameSpaceManager : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_INAMESPACEMANAGER_IID; return iid; }
NS_IMETHOD CreateRootNameSpace(nsINameSpace*& aRootNameSpace) = 0;
NS_IMETHOD RegisterNameSpace(const nsAReadableString& aURI,
PRInt32& aNameSpaceID) = 0;
NS_IMETHOD GetNameSpaceURI(PRInt32 aNameSpaceID, nsAWritableString& aURI) = 0;
NS_IMETHOD GetNameSpaceID(const nsAReadableString& aURI, PRInt32& aNameSpaceID) = 0;
};
extern NS_LAYOUT nsresult
NS_NewNameSpaceManager(nsINameSpaceManager** aInstancePtrResult);
#endif // nsINameSpaceManager_h___