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 "core/accessibility/AXTableRow.h"
31
32#include "core/accessibility/AXTableCell.h"
33#include "core/rendering/RenderTableRow.h"
34
35
36namespace WebCore {
37
38using namespace HTMLNames;
39
40AXTableRow::AXTableRow(RenderObject* renderer)
41    : AXRenderObject(renderer)
42{
43}
44
45AXTableRow::~AXTableRow()
46{
47}
48
49PassRefPtr<AXTableRow> AXTableRow::create(RenderObject* renderer)
50{
51    return adoptRef(new AXTableRow(renderer));
52}
53
54AccessibilityRole AXTableRow::determineAccessibilityRole()
55{
56    if (!isTableRow())
57        return AXRenderObject::determineAccessibilityRole();
58
59    m_ariaRole = determineAriaRoleAttribute();
60
61    AccessibilityRole ariaRole = ariaRoleAttribute();
62    if (ariaRole != UnknownRole)
63        return ariaRole;
64
65    return RowRole;
66}
67
68bool AXTableRow::isTableRow() const
69{
70    AXObject* table = parentTable();
71    if (!table || !table->isAXTable())
72        return false;
73
74    return true;
75}
76
77AXObject* AXTableRow::observableObject() const
78{
79    // This allows the table to be the one who sends notifications about tables.
80    return parentTable();
81}
82
83bool AXTableRow::computeAccessibilityIsIgnored() const
84{
85    AXObjectInclusion decision = defaultObjectInclusion();
86    if (decision == IncludeObject)
87        return false;
88    if (decision == IgnoreObject)
89        return true;
90
91    if (!isTableRow())
92        return AXRenderObject::computeAccessibilityIsIgnored();
93
94    return false;
95}
96
97AXObject* AXTableRow::parentTable() const
98{
99    AXObject* parent = parentObjectUnignored();
100    if (!parent || !parent->isAXTable())
101        return 0;
102
103    return parent;
104}
105
106AXObject* AXTableRow::headerObject()
107{
108    if (!m_renderer || !m_renderer->isTableRow())
109        return 0;
110
111    AccessibilityChildrenVector rowChildren = children();
112    if (!rowChildren.size())
113        return 0;
114
115    // check the first element in the row to see if it is a TH element
116    AXObject* cell = rowChildren[0].get();
117    if (!cell->isTableCell())
118        return 0;
119
120    RenderObject* cellRenderer = toAXTableCell(cell)->renderer();
121    if (!cellRenderer)
122        return 0;
123
124    Node* cellNode = cellRenderer->node();
125    if (!cellNode || !cellNode->hasTagName(thTag))
126        return 0;
127
128    return cell;
129}
130
131} // namespace WebCore
132