LCOV - code coverage report
Current view: directory - accessible/src/html - nsHTMLLinkAccessible.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 58 0 0.0 %
Date: 2012-06-02 Functions: 13 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                 :  *   Aaron Leventhal <aleventh@us.ibm.com> (original author)
      24                 :  *   Alexander Surkov <surkov.alexander@gmail.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #include "nsHTMLLinkAccessible.h"
      41                 : 
      42                 : #include "nsCoreUtils.h"
      43                 : #include "Role.h"
      44                 : #include "States.h"
      45                 : 
      46                 : #include "nsDocAccessible.h"
      47                 : #include "nsEventStates.h"
      48                 : #include "mozilla/dom/Element.h"
      49                 : 
      50                 : using namespace mozilla::a11y;
      51                 : 
      52                 : ////////////////////////////////////////////////////////////////////////////////
      53                 : // nsHTMLLinkAccessible
      54                 : ////////////////////////////////////////////////////////////////////////////////
      55                 : 
      56               0 : nsHTMLLinkAccessible::
      57                 :   nsHTMLLinkAccessible(nsIContent* aContent, nsDocAccessible* aDoc) :
      58               0 :   nsHyperTextAccessibleWrap(aContent, aDoc)
      59                 : {
      60               0 : }
      61                 : 
      62                 : // Expose nsIAccessibleHyperLink unconditionally
      63               0 : NS_IMPL_ISUPPORTS_INHERITED1(nsHTMLLinkAccessible, nsHyperTextAccessibleWrap,
      64                 :                              nsIAccessibleHyperLink)
      65                 : 
      66                 : ////////////////////////////////////////////////////////////////////////////////
      67                 : // nsIAccessible
      68                 : 
      69                 : role
      70               0 : nsHTMLLinkAccessible::NativeRole()
      71                 : {
      72               0 :   return roles::LINK;
      73                 : }
      74                 : 
      75                 : PRUint64
      76               0 : nsHTMLLinkAccessible::NativeState()
      77                 : {
      78               0 :   PRUint64 states = nsHyperTextAccessibleWrap::NativeState();
      79                 : 
      80               0 :   states  &= ~states::READONLY;
      81                 : 
      82               0 :   if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::name)) {
      83                 :     // This is how we indicate it is a named anchor
      84                 :     // In other words, this anchor can be selected as a location :)
      85                 :     // There is no other better state to use to indicate this.
      86               0 :     states |= states::SELECTABLE;
      87                 :   }
      88                 : 
      89               0 :   nsEventStates state = mContent->AsElement()->State();
      90               0 :   if (state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED |
      91               0 :                                   NS_EVENT_STATE_UNVISITED)) {
      92               0 :     states |= states::LINKED;
      93                 : 
      94               0 :     if (state.HasState(NS_EVENT_STATE_VISITED))
      95               0 :       states |= states::TRAVERSED;
      96                 : 
      97               0 :     return states;
      98                 :   }
      99                 : 
     100                 :   // This is a either named anchor (a link with also a name attribute) or
     101                 :   // it doesn't have any attributes. Check if 'click' event handler is
     102                 :   // registered, otherwise bail out.
     103               0 :   if (nsCoreUtils::HasClickListener(mContent))
     104               0 :     states |= states::LINKED;
     105                 : 
     106               0 :   return states;
     107                 : }
     108                 : 
     109                 : NS_IMETHODIMP
     110               0 : nsHTMLLinkAccessible::GetValue(nsAString& aValue)
     111                 : {
     112               0 :   aValue.Truncate();
     113                 : 
     114               0 :   nsresult rv = nsHyperTextAccessible::GetValue(aValue);
     115               0 :   NS_ENSURE_SUCCESS(rv, rv);
     116                 : 
     117               0 :   if (!aValue.IsEmpty())
     118               0 :     return NS_OK;
     119                 :   
     120               0 :   nsIPresShell* presShell(mDoc->PresShell());
     121               0 :   nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mContent));
     122               0 :   return presShell->GetLinkLocation(DOMNode, aValue);
     123                 : }
     124                 : 
     125                 : PRUint8
     126               0 : nsHTMLLinkAccessible::ActionCount()
     127                 : {
     128               0 :   return IsLinked() ? 1 : nsHyperTextAccessible::ActionCount();
     129                 : }
     130                 : 
     131                 : NS_IMETHODIMP
     132               0 : nsHTMLLinkAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
     133                 : {
     134               0 :   aName.Truncate();
     135                 : 
     136               0 :   if (!IsLinked())
     137               0 :     return nsHyperTextAccessible::GetActionName(aIndex, aName);
     138                 : 
     139                 :   // Action 0 (default action): Jump to link
     140               0 :   if (aIndex != eAction_Jump)
     141               0 :     return NS_ERROR_INVALID_ARG;
     142                 : 
     143               0 :   aName.AssignLiteral("jump");
     144               0 :   return NS_OK;
     145                 : }
     146                 : 
     147                 : NS_IMETHODIMP
     148               0 : nsHTMLLinkAccessible::DoAction(PRUint8 aIndex)
     149                 : {
     150               0 :   if (!IsLinked())
     151               0 :     return nsHyperTextAccessible::DoAction(aIndex);
     152                 : 
     153                 :   // Action 0 (default action): Jump to link
     154               0 :   if (aIndex != eAction_Jump)
     155               0 :     return NS_ERROR_INVALID_ARG;
     156                 : 
     157               0 :   if (IsDefunct())
     158               0 :     return NS_ERROR_FAILURE;
     159                 : 
     160               0 :   DoCommand();
     161               0 :   return NS_OK;
     162                 : }
     163                 : 
     164                 : ////////////////////////////////////////////////////////////////////////////////
     165                 : // HyperLinkAccessible
     166                 : 
     167                 : bool
     168               0 : nsHTMLLinkAccessible::IsLink()
     169                 : {
     170                 :   // Expose HyperLinkAccessible unconditionally.
     171               0 :   return true;
     172                 : }
     173                 : 
     174                 : already_AddRefed<nsIURI>
     175               0 : nsHTMLLinkAccessible::AnchorURIAt(PRUint32 aAnchorIndex)
     176                 : {
     177               0 :   return aAnchorIndex == 0 ? mContent->GetHrefURI() : nsnull;
     178                 : }
     179                 : 
     180                 : ////////////////////////////////////////////////////////////////////////////////
     181                 : // Protected members
     182                 : 
     183                 : bool
     184               0 : nsHTMLLinkAccessible::IsLinked()
     185                 : {
     186               0 :   if (IsDefunct())
     187               0 :     return false;
     188                 : 
     189               0 :   nsEventStates state = mContent->AsElement()->State();
     190                 :   return state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED |
     191               0 :                                      NS_EVENT_STATE_UNVISITED);
     192                 : }

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