accessible/src/msaa/CAccessibleImage.cpp

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   4 /* ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
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  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is mozilla.org code.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Mozilla Foundation.
  21  * Portions created by the Initial Developer are Copyright (C) 2007
  22  * the Initial Developer. All Rights Reserved.
  23  *
  24  * Contributor(s):
  25  *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
  26  *
  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either the GNU General Public License Version 2 or later (the "GPL"), or
  29  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  30  * in which case the provisions of the GPL or the LGPL are applicable instead
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  36  * the provisions above, a recipient may use your version of this file under
  37  * the terms of any one of the MPL, the GPL or the LGPL.
  38  *
  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #include "CAccessibleImage.h"
  42
  43 #include "AccessibleImage_i.c"
  44
  45 #include "nsIAccessible.h"
  46 #include "nsIAccessibleImage.h"
  47 #include "nsIAccessibleTypes.h"
  48 #include "nsAccessNodeWrap.h"
  49
  50 #include "nsCOMPtr.h"
  51 #include "nsString.h"
  52
  53 // IUnknown
  54
  55 STDMETHODIMP
  56 CAccessibleImage::QueryInterface(REFIID iid, void** ppv)
  57 {
  58   *ppv = NULL;
  59
  60   if (IID_IAccessibleImage == iid) {
  61     nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
  62     if (!imageAcc)
  63       return E_FAIL;
  64
  65     *ppv = static_cast<IAccessibleImage*>(this);
  66     (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
  67     return S_OK;
  68   }
  69
  70   return E_NOINTERFACE;
  71 }
  72
  73 // IAccessibleImage
  74
  75 STDMETHODIMP
  76 CAccessibleImage::get_description(BSTR *aDescription)
  77 {
  78 __try {
  79   *aDescription = NULL;
  80
  81   nsCOMPtr<nsIAccessible> acc(do_QueryInterface(this));
  82   if (!acc)
  83     return E_FAIL;
  84
  85   nsAutoString description;
  86   nsresult rv = acc->GetName(description);
  87   if (NS_FAILED(rv))
  88     return GetHRESULT(rv);
  89
  90   if (description.IsEmpty())
  91     return S_FALSE;
  92
  93   *aDescription = ::SysAllocStringLen(description.get(), description.Length());
  94   return *aDescription ? S_OK : E_OUTOFMEMORY;
  95
  96 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
  97   return E_FAIL;
  98 }
  99
 100 STDMETHODIMP
 101 CAccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
 102                                     long *aX,
 103                                     long *aY)
 104 {
 105 __try {
 106   *aX = 0;
 107   *aY = 0;
 108
 109   PRUint32 geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
 110     nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
 111     nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
 112
 113   nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
 114   if (!imageAcc)
 115     return E_FAIL;
 116
 117   PRInt32 x = 0, y = 0;
 118   nsresult rv = imageAcc->GetImagePosition(geckoCoordType, &x, &y);
 119   if (NS_FAILED(rv))
 120     return GetHRESULT(rv);
 121
 122   *aX = x;
 123   *aY = y;
 124   return S_OK;
 125
 126 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
 127
 128   return E_FAIL;
 129 }
 130
 131 STDMETHODIMP
 132 CAccessibleImage::get_imageSize(long *aHeight, long *aWidth)
 133 {
 134 __try {
 135   *aHeight = 0;
 136   *aWidth = 0;
 137
 138   nsCOMPtr<nsIAccessibleImage> imageAcc(do_QueryInterface(this));
 139   if (!imageAcc)
 140     return E_FAIL;
 141
 142   PRInt32 x = 0, y = 0, width = 0, height = 0;
 143   nsresult rv = imageAcc->GetImageSize(&width, &height);
 144   if (NS_FAILED(rv))
 145     return GetHRESULT(rv);
 146
 147   *aHeight = width;
 148   *aWidth = height;
 149   return S_OK;
 150
 151 } __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
 152   return E_FAIL;
 153 }
 154