LCOV - code coverage report
Current view: directory - accessible/src/base - AccGroupInfo.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 85 0 0.0 %
Date: 2012-06-02 Functions: 2 0 0.0 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is mozilla.org code.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *  Alexander Surkov <surkov.alexander@gmail.com> (original author)
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "AccGroupInfo.h"
      39                 : 
      40                 : #include "Role.h"
      41                 : #include "States.h"
      42                 : 
      43                 : using namespace mozilla::a11y;
      44                 : 
      45               0 : AccGroupInfo::AccGroupInfo(nsAccessible* aItem, role aRole) :
      46               0 :   mPosInSet(0), mSetSize(0), mParent(nsnull)
      47                 : {
      48               0 :   MOZ_COUNT_CTOR(AccGroupInfo);
      49               0 :   nsAccessible* parent = aItem->Parent();
      50               0 :   if (!parent)
      51               0 :     return;
      52                 : 
      53               0 :   PRInt32 indexInParent = aItem->IndexInParent();
      54               0 :   PRInt32 siblingCount = parent->GetChildCount();
      55               0 :   if (siblingCount < indexInParent) {
      56               0 :     NS_ERROR("Wrong index in parent! Tree invalidation problem.");
      57               0 :     return;
      58                 :   }
      59                 : 
      60               0 :   PRInt32 level = nsAccUtils::GetARIAOrDefaultLevel(aItem);
      61                 : 
      62                 :   // Compute position in set.
      63               0 :   mPosInSet = 1;
      64               0 :   for (PRInt32 idx = indexInParent - 1; idx >=0 ; idx--) {
      65               0 :     nsAccessible* sibling = parent->GetChildAt(idx);
      66               0 :     roles::Role siblingRole = sibling->Role();
      67                 : 
      68                 :     // If the sibling is separator then the group is ended.
      69               0 :     if (siblingRole == roles::SEPARATOR)
      70               0 :       break;
      71                 : 
      72                 :     // If sibling is not visible and hasn't the same base role.
      73               0 :     if (BaseRole(siblingRole) != aRole || sibling->State() & states::INVISIBLE)
      74               0 :       continue;
      75                 : 
      76                 :     // Check if it's hierarchical flatten structure, i.e. if the sibling
      77                 :     // level is lesser than this one then group is ended, if the sibling level
      78                 :     // is greater than this one then the group is split by some child elements
      79                 :     // (group will be continued).
      80               0 :     PRInt32 siblingLevel = nsAccUtils::GetARIAOrDefaultLevel(sibling);
      81               0 :     if (siblingLevel < level) {
      82               0 :       mParent = sibling;
      83               0 :       break;
      84                 :     }
      85                 : 
      86                 :     // Skip subset.
      87               0 :     if (siblingLevel > level)
      88               0 :       continue;
      89                 : 
      90                 :     // If the previous item in the group has calculated group information then
      91                 :     // build group information for this item based on found one.
      92               0 :     if (sibling->mGroupInfo) {
      93               0 :       mPosInSet += sibling->mGroupInfo->mPosInSet;
      94               0 :       mParent = sibling->mGroupInfo->mParent;
      95               0 :       mSetSize = sibling->mGroupInfo->mSetSize;
      96               0 :       return;
      97                 :     }
      98                 : 
      99               0 :     mPosInSet++;
     100                 :   }
     101                 : 
     102                 :   // Compute set size.
     103               0 :   mSetSize = mPosInSet;
     104                 : 
     105               0 :   for (PRInt32 idx = indexInParent + 1; idx < siblingCount; idx++) {
     106               0 :     nsAccessible* sibling = parent->GetChildAt(idx);
     107                 : 
     108               0 :     roles::Role siblingRole = sibling->Role();
     109                 : 
     110                 :     // If the sibling is separator then the group is ended.
     111               0 :     if (siblingRole == roles::SEPARATOR)
     112               0 :       break;
     113                 : 
     114                 :     // If sibling is visible and has the same base role
     115               0 :     if (BaseRole(siblingRole) != aRole || sibling->State() & states::INVISIBLE)
     116               0 :       continue;
     117                 : 
     118                 :     // and check if it's hierarchical flatten structure.
     119               0 :     PRInt32 siblingLevel = nsAccUtils::GetARIAOrDefaultLevel(sibling);
     120               0 :     if (siblingLevel < level)
     121               0 :       break;
     122                 : 
     123                 :     // Skip subset.
     124               0 :     if (siblingLevel > level)
     125               0 :       continue;
     126                 : 
     127                 :     // If the next item in the group has calculated group information then
     128                 :     // build group information for this item based on found one.
     129               0 :     if (sibling->mGroupInfo) {
     130               0 :       mParent = sibling->mGroupInfo->mParent;
     131               0 :       mSetSize = sibling->mGroupInfo->mSetSize;
     132               0 :       return;
     133                 :     }
     134                 : 
     135               0 :     mSetSize++;
     136                 :   }
     137                 : 
     138               0 :   if (mParent)
     139               0 :     return;
     140                 : 
     141               0 :   roles::Role parentRole = parent->Role();
     142               0 :   if (IsConceptualParent(aRole, parentRole))
     143               0 :     mParent = parent;
     144                 : 
     145                 :   // In the case of ARIA tree (not ARIA treegrid) a tree can be arranged by
     146                 :   // using ARIA groups to organize levels. In this case the parent of the tree
     147                 :   // item will be a group and the previous treeitem of that should be the tree
     148                 :   // item parent.
     149               0 :   if (parentRole != roles::GROUPING || aRole != roles::OUTLINEITEM)
     150               0 :     return;
     151                 : 
     152               0 :   nsAccessible* parentPrevSibling = parent->PrevSibling();
     153               0 :   if (!parentPrevSibling)
     154               0 :     return;
     155                 : 
     156               0 :   roles::Role parentPrevSiblingRole = parentPrevSibling->Role();
     157               0 :   if (parentPrevSiblingRole == roles::TEXT_LEAF) {
     158                 :     // XXX Sometimes an empty text accessible is in the hierarchy here,
     159                 :     // although the text does not appear to be rendered, GetRenderedText()
     160                 :     // says that it is so we need to skip past it to find the true
     161                 :     // previous sibling.
     162               0 :     parentPrevSibling = parentPrevSibling->PrevSibling();
     163               0 :     if (parentPrevSibling)
     164               0 :       parentPrevSiblingRole = parentPrevSibling->Role();
     165                 :   }
     166                 : 
     167                 :   // Previous sibling of parent group is a tree item, this is the
     168                 :   // conceptual tree item parent.
     169               0 :   if (parentPrevSiblingRole == roles::OUTLINEITEM)
     170               0 :     mParent = parentPrevSibling;
     171                 : }
     172                 : 
     173                 : bool
     174               0 : AccGroupInfo::IsConceptualParent(role aRole, role aParentRole)
     175                 : {
     176               0 :   if (aParentRole == roles::OUTLINE && aRole == roles::OUTLINEITEM)
     177               0 :     return true;
     178               0 :   if ((aParentRole == roles::TABLE || aParentRole == roles::TREE_TABLE) &&
     179                 :       aRole == roles::ROW)
     180               0 :     return true;
     181               0 :   if (aParentRole == roles::ROW &&
     182                 :       (aRole == roles::CELL || aRole == roles::GRID_CELL))
     183               0 :     return true;
     184               0 :   if (aParentRole == roles::LIST && aRole == roles::LISTITEM)
     185               0 :     return true;
     186               0 :   if (aParentRole == roles::COMBOBOX_LIST && aRole == roles::COMBOBOX_OPTION)
     187               0 :     return true;
     188               0 :   if (aParentRole == roles::LISTBOX && aRole == roles::OPTION)
     189               0 :     return true;
     190               0 :   if (aParentRole == roles::PAGETABLIST && aRole == roles::PAGETAB)
     191               0 :     return true;
     192               0 :   if ((aParentRole == roles::POPUP_MENU || aParentRole == roles::MENUPOPUP) &&
     193                 :       aRole == roles::MENUITEM)
     194               0 :     return true;
     195                 : 
     196               0 :   return false;
     197                 : }

Generated by: LCOV version 1.7