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 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 "AccessibilityTable.h"
34#include "AccessibilityTableCell.h"
35#include "HTMLNames.h"
36#include "HTMLTableRowElement.h"
37#include "RenderObject.h"
38#include "RenderTableCell.h"
39#include "RenderTableRow.h"
40
41namespace WebCore {
42
43using namespace HTMLNames;
44
45AccessibilityTableRow::AccessibilityTableRow(RenderObject* renderer)
46    : AccessibilityRenderObject(renderer)
47{
48}
49
50AccessibilityTableRow::~AccessibilityTableRow()
51{
52}
53
54PassRefPtr<AccessibilityTableRow> AccessibilityTableRow::create(RenderObject* renderer)
55{
56    return adoptRef(new AccessibilityTableRow(renderer));
57}
58
59AccessibilityRole AccessibilityTableRow::determineAccessibilityRole()
60{
61    if (!isTableRow())
62        return AccessibilityRenderObject::determineAccessibilityRole();
63
64    m_ariaRole = determineAriaRoleAttribute();
65
66    AccessibilityRole ariaRole = ariaRoleAttribute();
67    if (ariaRole != UnknownRole)
68        return ariaRole;
69
70    return RowRole;
71}
72
73bool AccessibilityTableRow::isTableRow() const
74{
75    AccessibilityObject* table = parentTable();
76    if (!table || !table->isAccessibilityTable())
77        return false;
78
79    return true;
80}
81
82AccessibilityObject* AccessibilityTableRow::observableObject() const
83{
84    // This allows the table to be the one who sends notifications about tables.
85    return parentTable();
86}
87
88bool AccessibilityTableRow::computeAccessibilityIsIgnored() const
89{
90    AccessibilityObjectInclusion decision = defaultObjectInclusion();
91    if (decision == IncludeObject)
92        return false;
93    if (decision == IgnoreObject)
94        return true;
95
96    if (!isTableRow())
97        return AccessibilityRenderObject::computeAccessibilityIsIgnored();
98
99    return false;
100}
101
102AccessibilityTable* AccessibilityTableRow::parentTable() const
103{
104    // The parent table might not be the direct ancestor of the row unfortunately. ARIA states that role="grid" should
105    // only have "row" elements, but if not, we still should handle it gracefully by finding the right table.
106    for (AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) {
107        // If this is a table object, but not an accessibility table, we should stop because we don't want to
108        // choose another ancestor table as this row's table.
109        if (parent->isTable())
110            return parent->isAccessibilityTable() ? toAccessibilityTable(parent) : 0;
111    }
112
113    return 0;
114}
115
116AccessibilityObject* AccessibilityTableRow::headerObject()
117{
118    if (!m_renderer || !m_renderer->isTableRow())
119        return 0;
120
121    const auto& rowChildren = children();
122    if (!rowChildren.size())
123        return 0;
124
125    // check the first element in the row to see if it is a TH element
126    AccessibilityObject* cell = rowChildren[0].get();
127    if (!cell->isTableCell())
128        return 0;
129
130    RenderObject* cellRenderer = toAccessibilityTableCell(cell)->renderer();
131    if (!cellRenderer)
132        return 0;
133
134    Node* cellNode = cellRenderer->node();
135    if (!cellNode || !cellNode->hasTagName(thTag))
136        return 0;
137
138    return cell;
139}
140
141} // namespace WebCore
142