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CAccessibleHypertext.cpp

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/* ***** 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
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 *
 * 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.
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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.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
 * 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
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#include "CAccessibleHypertext.h"

#include "AccessibleHypertext_i.c"

#include "nsIAccessibleHypertext.h"
#include "nsIWinAccessNode.h"

#include "nsCOMPtr.h"

// IUnknown

STDMETHODIMP
CAccessibleHypertext::QueryInterface(REFIID iid, void** ppv)
{
  *ppv = NULL;

  if (IID_IAccessibleHypertext == iid) {
    nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
    if (!hyperAcc)
      return E_NOINTERFACE;

    *ppv = static_cast<IAccessibleHypertext*>(this);
    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
    return S_OK;
  }

  return CAccessibleText::QueryInterface(iid, ppv);
}

// IAccessibleHypertext

STDMETHODIMP
CAccessibleHypertext::get_nHyperlinks(long *aHyperlinkCount)
{
  *aHyperlinkCount = 0;

  nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
  if (!hyperAcc)
    return E_FAIL;

  PRInt32 count = 0;
  nsresult rv = hyperAcc->GetLinks(&count);
  *aHyperlinkCount = count;

  return NS_FAILED(rv) ? E_FAIL : S_OK;
}

STDMETHODIMP
CAccessibleHypertext::get_hyperlink(long aIndex,
                                    IAccessibleHyperlink **aHyperlink)
{
  *aHyperlink = NULL;

  nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
  if (!hyperAcc)
    return E_FAIL;

  nsCOMPtr<nsIAccessibleHyperLink> hyperLink;
  hyperAcc->GetLink(aIndex, getter_AddRefs(hyperLink));
  if (!hyperLink)
    return E_FAIL;

  nsCOMPtr<nsIWinAccessNode> winAccessNode(do_QueryInterface(hyperLink));
  if (!winAccessNode)
    return E_FAIL;

  void *instancePtr = NULL;
  nsresult rv =  winAccessNode->QueryNativeInterface(IID_IAccessibleHyperlink,
                                                     &instancePtr);
  *aHyperlink = static_cast<IAccessibleHyperlink*>(instancePtr);

  return NS_FAILED(rv) ? E_FAIL : S_OK;
}

STDMETHODIMP
CAccessibleHypertext::get_hyperlinkIndex(long aCharIndex, long *aHyperlinkIndex)
{
  *aHyperlinkIndex = 0;

  nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
  if (!hyperAcc)
    return E_FAIL;

  PRInt32 index = 0;
  nsresult rv = hyperAcc->GetLinkIndex(aCharIndex, &index);
  *aHyperlinkIndex = index;

  return NS_FAILED(rv) ? E_FAIL : S_OK;
}


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