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nsAccessibleRelation.cpp

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 * License.
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 * 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.
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 * 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"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsAccessibleRelation.h"

#include "nsArrayUtils.h"
#include "nsComponentManagerUtils.h"

nsAccessibleRelation::
  nsAccessibleRelation(PRUint32 aType, nsIAccessible *aTarget) :
  mType(aType)
{
  mTargets = do_CreateInstance(NS_ARRAY_CONTRACTID);
  if (aTarget)
    mTargets->AppendElement(aTarget, PR_FALSE);
}

// nsISupports
NS_IMPL_ISUPPORTS2(nsAccessibleRelation, nsAccessibleRelation,
                   nsIAccessibleRelation)

// nsIAccessibleRelation
NS_IMETHODIMP
nsAccessibleRelation::GetRelationType(PRUint32 *aType)
{
  NS_ENSURE_ARG_POINTER(aType);

  *aType = mType;
  return NS_OK;
}

NS_IMETHODIMP
nsAccessibleRelation::GetTargetsCount(PRUint32 *aCount)
{
  NS_ENSURE_ARG_POINTER(aCount);
  *aCount = 0;

  NS_ENSURE_TRUE(mTargets, NS_ERROR_NOT_INITIALIZED);

  return mTargets->GetLength(aCount);
}

NS_IMETHODIMP
nsAccessibleRelation::GetTarget(PRUint32 aIndex, nsIAccessible **aTarget)
{
  NS_ENSURE_ARG_POINTER(aTarget);
  *aTarget = nsnull;

  NS_ENSURE_TRUE(mTargets, NS_ERROR_NOT_INITIALIZED);

  nsresult rv = NS_OK;
  nsCOMPtr<nsIAccessible> target = do_QueryElementAt(mTargets, aIndex, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  target.swap(*aTarget);
  return NS_OK;
}

NS_IMETHODIMP
nsAccessibleRelation::GetTargets(nsIArray **aTargets)
{
  NS_ENSURE_ARG_POINTER(aTargets);
  *aTargets = nsnull;

  NS_ENSURE_TRUE(mTargets, NS_ERROR_NOT_INITIALIZED);

  NS_ADDREF(*aTargets = mTargets);
  return NS_OK;
}

// nsAccessibleRelation
nsresult
00108 nsAccessibleRelation::AddTarget(nsIAccessible *aTarget)
{
  NS_ENSURE_ARG(aTarget);

  NS_ENSURE_TRUE(mTargets, NS_ERROR_NOT_INITIALIZED);

  return mTargets->AppendElement(aTarget, PR_FALSE);
}

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