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 "core/accessibility/AXARIAGridRow.h"
31
32#include "core/accessibility/AXTable.h"
33
34using namespace std;
35
36namespace WebCore {
37
38AXARIAGridRow::AXARIAGridRow(RenderObject* renderer)
39    : AXTableRow(renderer)
40{
41}
42
43AXARIAGridRow::~AXARIAGridRow()
44{
45}
46
47PassRefPtr<AXARIAGridRow> AXARIAGridRow::create(RenderObject* renderer)
48{
49    return adoptRef(new AXARIAGridRow(renderer));
50}
51
52bool AXARIAGridRow::isARIATreeGridRow() const
53{
54    AXObject* parent = parentTable();
55    if (!parent)
56        return false;
57
58    return parent->ariaRoleAttribute() == TreeGridRole;
59}
60
61void AXARIAGridRow::disclosedRows(AccessibilityChildrenVector& disclosedRows)
62{
63    // The contiguous disclosed rows will be the rows in the table that
64    // have an aria-level of plus 1 from this row.
65    AXObject* parent = parentObjectUnignored();
66    if (!parent || !parent->isAXTable())
67        return;
68
69    // Search for rows that match the correct level.
70    // Only take the subsequent rows from this one that are +1 from this row's level.
71    int index = rowIndex();
72    if (index < 0)
73        return;
74
75    unsigned level = hierarchicalLevel();
76    AccessibilityChildrenVector& allRows = toAXTable(parent)->rows();
77    int rowCount = allRows.size();
78    for (int k = index + 1; k < rowCount; ++k) {
79        AXObject* row = allRows[k].get();
80        // Stop at the first row that doesn't match the correct level.
81        if (row->hierarchicalLevel() != level + 1)
82            break;
83
84        disclosedRows.append(row);
85    }
86}
87
88AXObject* AXARIAGridRow::disclosedByRow() const
89{
90    // The row that discloses this one is the row in the table
91    // that is aria-level subtract 1 from this row.
92    AXObject* parent = parentObjectUnignored();
93    if (!parent || !parent->isAXTable())
94        return 0;
95
96    // If the level is 1 or less, than nothing discloses this row.
97    unsigned level = hierarchicalLevel();
98    if (level <= 1)
99        return 0;
100
101    // Search for the previous row that matches the correct level.
102    int index = rowIndex();
103    AccessibilityChildrenVector& allRows = toAXTable(parent)->rows();
104    int rowCount = allRows.size();
105    if (index >= rowCount)
106        return 0;
107
108    for (int k = index - 1; k >= 0; --k) {
109        AXObject* row = allRows[k].get();
110        if (row->hierarchicalLevel() == level - 1)
111            return row;
112    }
113
114    return 0;
115}
116
117AXObject* AXARIAGridRow::headerObject()
118{
119    AccessibilityChildrenVector rowChildren = children();
120    unsigned childrenCount = rowChildren.size();
121    for (unsigned i = 0; i < childrenCount; ++i) {
122        AXObject* cell = rowChildren[i].get();
123        if (cell->ariaRoleAttribute() == RowHeaderRole)
124            return cell;
125    }
126
127    return 0;
128}
129
130} // namespace WebCore
131