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CAccessibleImage.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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
 * the License. You may obtain a copy of the License at
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 *
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 * 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
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 * 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 the GNU General Public License Version 2 or later (the "GPL"), or
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 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "CAccessibleImage.h"

#include "AccessibleImage_i.c"

#include "nsIAccessible.h"
#include "nsIAccessibleImage.h"
#include "nsIAccessibleTypes.h"
#include "nsAccessNodeWrap.h"

#include "nsCOMPtr.h"
#include "nsString.h"

// IUnknown

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

  if (IID_IAccessibleImage == iid) {
    nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
    if (!imageAcc)
      return E_FAIL;

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

  return E_NOINTERFACE;
}

// IAccessibleImage

STDMETHODIMP
CAccessibleImage::get_description(BSTR *aDescription)
{
__try {
  *aDescription = NULL;

  nsCOMPtr<nsIAccessible> acc(do_QueryInterface(this));
  if (!acc)
    return E_FAIL;

  nsAutoString description;
  nsresult rv = acc->GetName(description);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  if (description.IsEmpty())
    return S_FALSE;

  *aDescription = ::SysAllocStringLen(description.get(), description.Length());
  return *aDescription ? S_OK : E_OUTOFMEMORY;

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
  return E_FAIL;
}

STDMETHODIMP
CAccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
                                    long *aX,
                                    long *aY)
{
__try {
  *aX = 0;
  *aY = 0;

  PRUint32 geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
    nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
    nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;

  nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
  if (!imageAcc)
    return E_FAIL;

  PRInt32 x = 0, y = 0;
  nsresult rv = imageAcc->GetImagePosition(geckoCoordType, &x, &y);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  *aX = x;
  *aY = y;
  return S_OK;

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleImage::get_imageSize(long *aHeight, long *aWidth)
{
__try {
  *aHeight = 0;
  *aWidth = 0;

  nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
  if (!imageAcc)
    return E_FAIL;

  PRInt32 x = 0, y = 0, width = 0, height = 0;
  nsresult rv = imageAcc->GetImageSize(&width, &height);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  *aHeight = width;
  *aWidth = height;
  return S_OK;

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
  return E_FAIL;
}


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