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 "AccessibilityARIAGridRow.h"
31
32 #include "AccessibilityObject.h"
33 #include "AccessibilityTable.h"
34 #include "RenderObject.h"
35
36 using namespace std;
37
38 namespace WebCore {
39
AccessibilityARIAGridRow(RenderObject * renderer)40 AccessibilityARIAGridRow::AccessibilityARIAGridRow(RenderObject* renderer)
41 : AccessibilityTableRow(renderer)
42 {
43 }
44
~AccessibilityARIAGridRow()45 AccessibilityARIAGridRow::~AccessibilityARIAGridRow()
46 {
47 }
48
create(RenderObject * renderer)49 PassRefPtr<AccessibilityARIAGridRow> AccessibilityARIAGridRow::create(RenderObject* renderer)
50 {
51 return adoptRef(new AccessibilityARIAGridRow(renderer));
52 }
53
isARIATreeGridRow() const54 bool AccessibilityARIAGridRow::isARIATreeGridRow() const
55 {
56 AccessibilityObject* parent = parentTable();
57 if (!parent)
58 return false;
59
60 return parent->ariaRoleAttribute() == TreeGridRole;
61 }
62
disclosedRows(AccessibilityChildrenVector & disclosedRows)63 void AccessibilityARIAGridRow::disclosedRows(AccessibilityChildrenVector& disclosedRows)
64 {
65 // The contiguous disclosed rows will be the rows in the table that
66 // have an aria-level of plus 1 from this row.
67 AccessibilityObject* parent = parentObjectUnignored();
68 if (!parent || !parent->isAccessibilityTable())
69 return;
70
71 // Search for rows that match the correct level.
72 // Only take the subsequent rows from this one that are +1 from this row's level.
73 int index = rowIndex();
74 if (index < 0)
75 return;
76
77 unsigned level = hierarchicalLevel();
78 AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();
79 int rowCount = allRows.size();
80 for (int k = index + 1; k < rowCount; ++k) {
81 AccessibilityObject* row = allRows[k].get();
82 // Stop at the first row that doesn't match the correct level.
83 if (row->hierarchicalLevel() != level + 1)
84 break;
85
86 disclosedRows.append(row);
87 }
88 }
89
disclosedByRow() const90 AccessibilityObject* AccessibilityARIAGridRow::disclosedByRow() const
91 {
92 // The row that discloses this one is the row in the table
93 // that is aria-level subtract 1 from this row.
94 AccessibilityObject* parent = parentObjectUnignored();
95 if (!parent || !parent->isAccessibilityTable())
96 return 0;
97
98 // If the level is 1 or less, than nothing discloses this row.
99 unsigned level = hierarchicalLevel();
100 if (level <= 1)
101 return 0;
102
103 // Search for the previous row that matches the correct level.
104 int index = rowIndex();
105 AccessibilityChildrenVector& allRows = static_cast<AccessibilityTable*>(parent)->rows();
106 int rowCount = allRows.size();
107 if (index >= rowCount)
108 return 0;
109
110 for (int k = index - 1; k >= 0; --k) {
111 AccessibilityObject* row = allRows[k].get();
112 if (row->hierarchicalLevel() == level - 1)
113 return row;
114 }
115
116 return 0;
117 }
118
parentTable() const119 AccessibilityObject* AccessibilityARIAGridRow::parentTable() const
120 {
121 AccessibilityObject* parent = parentObjectUnignored();
122 if (!parent->isAccessibilityTable())
123 return 0;
124
125 return parent;
126 }
127
headerObject()128 AccessibilityObject* AccessibilityARIAGridRow::headerObject()
129 {
130 AccessibilityChildrenVector rowChildren = children();
131 unsigned childrenCount = rowChildren.size();
132 for (unsigned i = 0; i < childrenCount; ++i) {
133 AccessibilityObject* cell = rowChildren[i].get();
134 if (cell->ariaRoleAttribute() == RowHeaderRole)
135 return cell;
136 }
137
138 return 0;
139 }
140
141 } // namespace WebCore
142