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/AXARIAGrid.h"
31
32 #include "core/accessibility/AXObjectCache.h"
33 #include "core/accessibility/AXTableColumn.h"
34 #include "core/accessibility/AXTableRow.h"
35 #include "core/rendering/RenderObject.h"
36
37
38 namespace blink {
39
AXARIAGrid(RenderObject * renderer)40 AXARIAGrid::AXARIAGrid(RenderObject* renderer)
41 : AXTable(renderer)
42 {
43 }
44
~AXARIAGrid()45 AXARIAGrid::~AXARIAGrid()
46 {
47 }
48
create(RenderObject * renderer)49 PassRefPtr<AXARIAGrid> AXARIAGrid::create(RenderObject* renderer)
50 {
51 return adoptRef(new AXARIAGrid(renderer));
52 }
53
addTableCellChild(AXObject * child,HashSet<AXObject * > & appendedRows,unsigned & columnCount)54 bool AXARIAGrid::addTableCellChild(AXObject* child, HashSet<AXObject*>& appendedRows, unsigned& columnCount)
55 {
56 if (!child || !child->isTableRow() || child->ariaRoleAttribute() != RowRole)
57 return false;
58
59 AXTableRow* row = toAXTableRow(child);
60 if (appendedRows.contains(row))
61 return false;
62
63 // store the maximum number of columns
64 unsigned rowCellCount = row->children().size();
65 if (rowCellCount > columnCount)
66 columnCount = rowCellCount;
67
68 row->setRowIndex((int)m_rows.size());
69 m_rows.append(row);
70
71 // Try adding the row if it's not ignoring accessibility,
72 // otherwise add its children (the cells) as the grid's children.
73 if (!row->accessibilityIsIgnored())
74 m_children.append(row);
75 else
76 m_children.appendVector(row->children());
77
78 appendedRows.add(row);
79 return true;
80 }
81
addChildren()82 void AXARIAGrid::addChildren()
83 {
84 ASSERT(!m_haveChildren);
85
86 if (!isAXTable()) {
87 AXRenderObject::addChildren();
88 return;
89 }
90
91 m_haveChildren = true;
92 if (!m_renderer)
93 return;
94
95 AXObjectCache* axCache = m_renderer->document().axObjectCache();
96
97 // add only rows that are labeled as aria rows
98 HashSet<AXObject*> appendedRows;
99 unsigned columnCount = 0;
100 for (RefPtr<AXObject> child = firstChild(); child; child = child->nextSibling()) {
101
102 if (!addTableCellChild(child.get(), appendedRows, columnCount)) {
103
104 // in case the render tree doesn't match the expected ARIA hierarchy, look at the children
105 if (!child->hasChildren())
106 child->addChildren();
107
108 // The children of this non-row will contain all non-ignored elements (recursing to find them).
109 // This allows the table to dive arbitrarily deep to find the rows.
110 AccessibilityChildrenVector children = child->children();
111 size_t length = children.size();
112 for (size_t i = 0; i < length; ++i)
113 addTableCellChild(children[i].get(), appendedRows, columnCount);
114 }
115 }
116
117 // make the columns based on the number of columns in the first body
118 for (unsigned i = 0; i < columnCount; ++i) {
119 AXTableColumn* column = toAXTableColumn(axCache->getOrCreate(ColumnRole));
120 column->setColumnIndex((int)i);
121 column->setParent(this);
122 m_columns.append(column);
123 if (!column->accessibilityIsIgnored())
124 m_children.append(column);
125 }
126
127 AXObject* headerContainerObject = headerContainer();
128 if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
129 m_children.append(headerContainerObject);
130 }
131
132 } // namespace blink
133