/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Peter Van der Beken <peterv@netscape.com>
 *   Allan Beaufour <allan@beaufour.dk>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsIAttribute_h___
#define nsIAttribute_h___

#include "nsISupports.h"
#include "nsINodeInfo.h"
#include "nsIContent.h"
#include "nsPropertyTable.h"

class nsIAtom;
class nsDOMAttributeMap;

#define NS_IATTRIBUTE_IID  \
 {0x4940cc50, 0x2ede, 0x4883,        \
 {0x95, 0xf5, 0x53, 0xdb, 0x50, 0x50, 0x13, 0x3e}}

class nsIAttribute : public nsISupports
{
public:
  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IATTRIBUTE_IID)

  virtual void SetMap(nsDOMAttributeMap *aMap) = 0;
  
  nsDOMAttributeMap *GetMap()
  {
    return mAttrMap;
  }

  nsINodeInfo *NodeInfo()
  {
    return mNodeInfo;
  }

  virtual nsIContent* GetContent() const = 0;

  nsIDocument *GetOwnerDoc() const
  {
    nsIContent* content = GetContent();
    return content ? content->GetOwnerDoc() : mNodeInfo->GetDocument();
  }

  /*
   * Methods for manipulating content node properties.  For documentation on
   * properties, see nsPropertyTable.h.
   */
  virtual void* GetProperty(nsIAtom  *aPropertyName,
                            nsresult *aStatus = nsnull) = 0;

  virtual nsresult SetProperty(nsIAtom                   *aPropertyName,
                               void                      *aValue,
                               NSPropertyDtorFunc         aDtor = nsnull) = 0;

  virtual nsresult DeleteProperty(nsIAtom *aPropertyName) = 0;

  virtual void* UnsetProperty(nsIAtom  *aPropertyName,
                              nsresult *aStatus = nsnull) = 0;

protected:
  nsIAttribute(nsDOMAttributeMap *aAttrMap, nsINodeInfo *aNodeInfo)
    : mAttrMap(aAttrMap), mNodeInfo(aNodeInfo)
  {
  }

  nsDOMAttributeMap *mAttrMap; // WEAK
  nsCOMPtr<nsINodeInfo> mNodeInfo; // STRONG

private:
  nsIAttribute(); // Not to be implemented.
};

#endif /* nsIAttribute_h___ */