LCOV - code coverage report
Current view: directory - accessible/src/html - nsHTMLImageAccessible.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 83 0 0.0 %
Date: 2012-06-02 Functions: 15 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Author: Aaron Leventhal (aaronl@netscape.com)
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "nsHTMLImageAccessible.h"
      40                 : 
      41                 : #include "nsAccUtils.h"
      42                 : #include "Role.h"
      43                 : #include "States.h"
      44                 : 
      45                 : #include "imgIContainer.h"
      46                 : #include "imgIRequest.h"
      47                 : #include "nsIDocument.h"
      48                 : #include "nsIImageLoadingContent.h"
      49                 : #include "nsILink.h"
      50                 : #include "nsIPresShell.h"
      51                 : #include "nsIServiceManager.h"
      52                 : #include "nsIDOMHTMLImageElement.h"
      53                 : #include "nsIDOMDocument.h"
      54                 : #include "nsPIDOMWindow.h"
      55                 : 
      56                 : using namespace mozilla::a11y;
      57                 : 
      58                 : ////////////////////////////////////////////////////////////////////////////////
      59                 : // nsHTMLImageAccessible
      60                 : ////////////////////////////////////////////////////////////////////////////////
      61                 : 
      62               0 : nsHTMLImageAccessible::
      63                 :   nsHTMLImageAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
      64               0 :   nsLinkableAccessible(aContent, aDoc)
      65                 : {
      66               0 : }
      67                 : 
      68               0 : NS_IMPL_ISUPPORTS_INHERITED1(nsHTMLImageAccessible, nsAccessible,
      69                 :                              nsIAccessibleImage)
      70                 : 
      71                 : ////////////////////////////////////////////////////////////////////////////////
      72                 : // nsAccessible public
      73                 : 
      74                 : PRUint64
      75               0 : nsHTMLImageAccessible::NativeState()
      76                 : {
      77                 :   // The state is a bitfield, get our inherited state, then logically OR it with
      78                 :   // states::ANIMATED if this is an animated image.
      79                 : 
      80               0 :   PRUint64 state = nsLinkableAccessible::NativeState();
      81                 : 
      82               0 :   nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mContent));
      83               0 :   nsCOMPtr<imgIRequest> imageRequest;
      84                 : 
      85               0 :   if (content)
      86               0 :     content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
      87               0 :                         getter_AddRefs(imageRequest));
      88                 : 
      89               0 :   nsCOMPtr<imgIContainer> imgContainer;
      90               0 :   if (imageRequest)
      91               0 :     imageRequest->GetImage(getter_AddRefs(imgContainer));
      92                 : 
      93               0 :   if (imgContainer) {
      94                 :     bool animated;
      95               0 :     imgContainer->GetAnimated(&animated);
      96               0 :     if (animated)
      97               0 :       state |= states::ANIMATED;
      98                 :   }
      99                 : 
     100               0 :   return state;
     101                 : }
     102                 : 
     103                 : nsresult
     104               0 : nsHTMLImageAccessible::GetNameInternal(nsAString& aName)
     105                 : {
     106                 :   bool hasAltAttrib =
     107               0 :     mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName);
     108               0 :   if (!aName.IsEmpty())
     109               0 :     return NS_OK;
     110                 : 
     111               0 :   nsresult rv = nsAccessible::GetNameInternal(aName);
     112               0 :   NS_ENSURE_SUCCESS(rv, rv);
     113                 : 
     114               0 :   if (aName.IsEmpty() && hasAltAttrib) {
     115                 :     // No accessible name but empty 'alt' attribute is present. If further name
     116                 :     // computation algorithm doesn't provide non empty name then it means
     117                 :     // an empty 'alt' attribute was used to indicate a decorative image (see
     118                 :     // nsIAccessible::name attribute for details).
     119               0 :     return NS_OK_EMPTY_NAME;
     120                 :   }
     121                 : 
     122               0 :   return NS_OK;
     123                 : }
     124                 : 
     125                 : role
     126               0 : nsHTMLImageAccessible::NativeRole()
     127                 : {
     128               0 :   return roles::GRAPHIC;
     129                 : }
     130                 : 
     131                 : ////////////////////////////////////////////////////////////////////////////////
     132                 : // nsIAccessible
     133                 : 
     134                 : PRUint8
     135               0 : nsHTMLImageAccessible::ActionCount()
     136                 : {
     137               0 :   PRUint8 actionCount = nsLinkableAccessible::ActionCount();
     138               0 :   return HasLongDesc() ? actionCount + 1 : actionCount;
     139                 : }
     140                 : 
     141                 : NS_IMETHODIMP
     142               0 : nsHTMLImageAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
     143                 : {
     144               0 :   aName.Truncate();
     145                 : 
     146               0 :   if (IsDefunct())
     147               0 :     return NS_ERROR_FAILURE;
     148                 : 
     149               0 :   if (IsValidLongDescIndex(aIndex)) {
     150               0 :     aName.AssignLiteral("showlongdesc"); 
     151               0 :     return NS_OK;
     152                 :   }
     153               0 :   return nsLinkableAccessible::GetActionName(aIndex, aName);
     154                 : }
     155                 : 
     156                 : NS_IMETHODIMP
     157               0 : nsHTMLImageAccessible::DoAction(PRUint8 aIndex)
     158                 : {
     159               0 :   if (IsDefunct())
     160               0 :     return NS_ERROR_FAILURE;
     161                 : 
     162               0 :   if (IsValidLongDescIndex(aIndex)) {
     163                 :     //get the long description uri and open in a new window
     164               0 :     nsCOMPtr<nsIDOMHTMLImageElement> element(do_QueryInterface(mContent));
     165               0 :     NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
     166                 : 
     167               0 :     nsAutoString longDesc;
     168               0 :     nsresult rv = element->GetLongDesc(longDesc);
     169               0 :     NS_ENSURE_SUCCESS(rv, rv);
     170                 : 
     171               0 :     nsIDocument* document = mContent->OwnerDoc();
     172               0 :     nsCOMPtr<nsPIDOMWindow> piWindow = document->GetWindow();
     173               0 :     nsCOMPtr<nsIDOMWindow> win = do_QueryInterface(piWindow);
     174               0 :     NS_ENSURE_TRUE(win, NS_ERROR_FAILURE);
     175               0 :     nsCOMPtr<nsIDOMWindow> tmp;
     176               0 :     return win->Open(longDesc, EmptyString(), EmptyString(),
     177               0 :                      getter_AddRefs(tmp));
     178                 :   }
     179               0 :   return nsLinkableAccessible::DoAction(aIndex);
     180                 : }
     181                 : 
     182                 : ////////////////////////////////////////////////////////////////////////////////
     183                 : // nsIAccessibleImage
     184                 : 
     185                 : NS_IMETHODIMP
     186               0 : nsHTMLImageAccessible::GetImagePosition(PRUint32 aCoordType,
     187                 :                                         PRInt32 *aX, PRInt32 *aY)
     188                 : {
     189                 :   PRInt32 width, height;
     190               0 :   nsresult rv = GetBounds(aX, aY, &width, &height);
     191               0 :   if (NS_FAILED(rv))
     192               0 :     return rv;
     193                 : 
     194               0 :   return nsAccUtils::ConvertScreenCoordsTo(aX, aY, aCoordType, this);
     195                 : }
     196                 : 
     197                 : NS_IMETHODIMP
     198               0 : nsHTMLImageAccessible::GetImageSize(PRInt32 *aWidth, PRInt32 *aHeight)
     199                 : {
     200                 :   PRInt32 x, y;
     201               0 :   return GetBounds(&x, &y, aWidth, aHeight);
     202                 : }
     203                 : 
     204                 : // nsAccessible
     205                 : nsresult
     206               0 : nsHTMLImageAccessible::GetAttributesInternal(nsIPersistentProperties *aAttributes)
     207                 : {
     208               0 :   if (IsDefunct())
     209               0 :     return NS_ERROR_FAILURE;
     210                 :   
     211               0 :   nsresult rv = nsLinkableAccessible::GetAttributesInternal(aAttributes);
     212               0 :   NS_ENSURE_SUCCESS(rv, rv);
     213                 : 
     214               0 :   nsAutoString src;
     215               0 :   mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::src, src);
     216               0 :   if (!src.IsEmpty())
     217               0 :     nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::src, src);
     218                 : 
     219               0 :   return NS_OK;
     220                 : }
     221                 : 
     222                 : ////////////////////////////////////////////////////////////////////////////////
     223                 : // Private methods
     224                 : 
     225                 : bool
     226               0 : nsHTMLImageAccessible::HasLongDesc()
     227                 : {
     228               0 :   if (IsDefunct())
     229               0 :     return false;
     230                 : 
     231               0 :   return mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::longdesc);
     232                 : }
     233                 : 
     234                 : bool
     235               0 : nsHTMLImageAccessible::IsValidLongDescIndex(PRUint8 aIndex)
     236                 : {
     237               0 :   if (!HasLongDesc())
     238               0 :     return false;
     239                 : 
     240               0 :   return aIndex == nsLinkableAccessible::ActionCount();
     241                 : }

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