/* -*- 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
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
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 * either of 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"),
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#ifndef _nsAccessibleRelation_H_
#define _nsAccessibleRelation_H_

#include "nsIAccessible.h"
#include "nsIAccessibleRelation.h"

#include "nsCOMPtr.h"
#include "nsIMutableArray.h"

#define NS_ACCRELATION_IMPL_CID                         \
{                                                       \
  0xb20390d0,                                           \
  0x40d3,                                               \
  0x4c76,                                               \
  { 0xb6, 0x2e, 0xc2, 0x30, 0xc8, 0xea, 0x0c, 0x1e }    \
}

/**
 * Class represents an accessible relation.
 */
class nsAccessibleRelation: public nsIAccessibleRelation
{
public:
  nsAccessibleRelation(PRUint32 aType, nsIAccessible *aTarget);

  NS_DECL_ISUPPORTS
  NS_DECL_NSIACCESSIBLERELATION

  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ACCRELATION_IMPL_CID)

  /**
   * Add target for the given key.
   *
   * @param aTarget - accessible target for the given relation.
   */
  nsresult AddTarget(nsIAccessible *aTarget);

private:
  PRUint32 mType;
  nsCOMPtr<nsIMutableArray> mTargets;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsAccessibleRelation, NS_ACCRELATION_IMPL_CID)

#endif
