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      1 /*
      2  * Copyright (C) 2009 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "AccessibilityARIAGridCell.h"
     31 
     32 #include "AccessibilityObject.h"
     33 #include "AccessibilityTable.h"
     34 #include "AccessibilityTableRow.h"
     35 
     36 using namespace std;
     37 
     38 namespace WebCore {
     39 
     40 AccessibilityARIAGridCell::AccessibilityARIAGridCell(RenderObject* renderer)
     41     : AccessibilityTableCell(renderer)
     42 {
     43 }
     44 
     45 AccessibilityARIAGridCell::~AccessibilityARIAGridCell()
     46 {
     47 }
     48 
     49 PassRefPtr<AccessibilityARIAGridCell> AccessibilityARIAGridCell::create(RenderObject* renderer)
     50 {
     51     return adoptRef(new AccessibilityARIAGridCell(renderer));
     52 }
     53 
     54 AccessibilityObject* AccessibilityARIAGridCell::parentTable() const
     55 {
     56     AccessibilityObject* parent = parentObjectUnignored();
     57     if (!parent)
     58         return 0;
     59 
     60     if (parent->isAccessibilityTable())
     61         return parent;
     62 
     63     // It could happen that we hadn't reached the parent table yet (in
     64     // case objects for rows were not ignoring accessibility) so for
     65     // that reason we need to run parentObjectUnignored once again.
     66     parent = parent->parentObjectUnignored();
     67     if (!parent || !parent->isAccessibilityTable())
     68         return 0;
     69 
     70     return parent;
     71 }
     72 
     73 void AccessibilityARIAGridCell::rowIndexRange(pair<int, int>& rowRange)
     74 {
     75     AccessibilityObject* parent = parentObjectUnignored();
     76     if (!parent)
     77         return;
     78 
     79     if (parent->isTableRow()) {
     80         // We already got a table row, use its API.
     81         rowRange.first = static_cast<AccessibilityTableRow*>(parent)->rowIndex();
     82     } else if (parent->isAccessibilityTable()) {
     83         // We reached the parent table, so we need to inspect its
     84         // children to determine the row index for the cell in it.
     85         unsigned columnCount = static_cast<AccessibilityTable*>(parent)->columnCount();
     86         if (!columnCount)
     87             return;
     88 
     89         AccessibilityChildrenVector siblings = parent->children();
     90         unsigned childrenSize = siblings.size();
     91         for (unsigned k = 0; k < childrenSize; ++k) {
     92             if (siblings[k].get() == this) {
     93                 rowRange.first = k / columnCount;
     94                 break;
     95             }
     96         }
     97     }
     98 
     99     // as far as I can tell, grid cells cannot span rows
    100     rowRange.second = 1;
    101 }
    102 
    103 void AccessibilityARIAGridCell::columnIndexRange(pair<int, int>& columnRange)
    104 {
    105     AccessibilityObject* parent = parentObjectUnignored();
    106     if (!parent)
    107         return;
    108 
    109     if (!parent->isTableRow() && !parent->isAccessibilityTable())
    110         return;
    111 
    112     AccessibilityChildrenVector siblings = parent->children();
    113     unsigned childrenSize = siblings.size();
    114     for (unsigned k = 0; k < childrenSize; ++k) {
    115         if (siblings[k].get() == this) {
    116             columnRange.first = k;
    117             break;
    118         }
    119     }
    120 
    121     // as far as I can tell, grid cells cannot span columns
    122     columnRange.second = 1;
    123 }
    124 
    125 } // namespace WebCore
    126