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      1 /*
      2  * Copyright (C) 2008 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 "AccessibilityTableRow.h"
     31 
     32 #include "AXObjectCache.h"
     33 #include "AccessibilityTableCell.h"
     34 #include "HTMLNames.h"
     35 #include "HTMLTableRowElement.h"
     36 #include "RenderObject.h"
     37 #include "RenderTableCell.h"
     38 #include "RenderTableRow.h"
     39 
     40 using namespace std;
     41 
     42 namespace WebCore {
     43 
     44 using namespace HTMLNames;
     45 
     46 AccessibilityTableRow::AccessibilityTableRow(RenderObject* renderer)
     47     : AccessibilityRenderObject(renderer)
     48 {
     49 }
     50 
     51 AccessibilityTableRow::~AccessibilityTableRow()
     52 {
     53 }
     54 
     55 PassRefPtr<AccessibilityTableRow> AccessibilityTableRow::create(RenderObject* renderer)
     56 {
     57     return adoptRef(new AccessibilityTableRow(renderer));
     58 }
     59 
     60 AccessibilityRole AccessibilityTableRow::roleValue() const
     61 {
     62     if (!isTableRow())
     63         return AccessibilityRenderObject::roleValue();
     64 
     65     return RowRole;
     66 }
     67 
     68 bool AccessibilityTableRow::isTableRow() const
     69 {
     70     AccessibilityObject* table = parentTable();
     71     if (!table || !table->isAccessibilityTable())
     72         return false;
     73 
     74     return true;
     75 }
     76 
     77 bool AccessibilityTableRow::accessibilityIsIgnored() const
     78 {
     79     AccessibilityObjectInclusion decision = accessibilityIsIgnoredBase();
     80     if (decision == IncludeObject)
     81         return false;
     82     if (decision == IgnoreObject)
     83         return true;
     84 
     85     if (!isTableRow())
     86         return AccessibilityRenderObject::accessibilityIsIgnored();
     87 
     88     return false;
     89 }
     90 
     91 AccessibilityObject* AccessibilityTableRow::parentTable() const
     92 {
     93     if (!m_renderer || !m_renderer->isTableRow())
     94         return 0;
     95 
     96     // Do not use getOrCreate. parentTable() can be called while the render tree is being modified.
     97     return axObjectCache()->get(toRenderTableRow(m_renderer)->table());
     98 }
     99 
    100 AccessibilityObject* AccessibilityTableRow::headerObject()
    101 {
    102     if (!m_renderer || !m_renderer->isTableRow())
    103         return 0;
    104 
    105     AccessibilityChildrenVector rowChildren = children();
    106     if (!rowChildren.size())
    107         return 0;
    108 
    109     // check the first element in the row to see if it is a TH element
    110     AccessibilityObject* cell = rowChildren[0].get();
    111     if (!cell->isTableCell())
    112         return 0;
    113 
    114     RenderObject* cellRenderer = static_cast<AccessibilityTableCell*>(cell)->renderer();
    115     if (!cellRenderer)
    116         return 0;
    117 
    118     Node* cellNode = cellRenderer->node();
    119     if (!cellNode || !cellNode->hasTagName(thTag))
    120         return 0;
    121 
    122     return cell;
    123 }
    124 
    125 } // namespace WebCore
    126