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 using namespace std;
38
39 namespace WebCore {
40
AXARIAGrid(RenderObject * renderer)41 AXARIAGrid::AXARIAGrid(RenderObject* renderer)
42 : AXTable(renderer)
43 {
44 }
45
~AXARIAGrid()46 AXARIAGrid::~AXARIAGrid()
47 {
48 }
49
create(RenderObject * renderer)50 PassRefPtr<AXARIAGrid> AXARIAGrid::create(RenderObject* renderer)
51 {
52 return adoptRef(new AXARIAGrid(renderer));
53 }
54
addTableCellChild(AXObject * child,HashSet<AXObject * > & appendedRows,unsigned & columnCount)55 bool AXARIAGrid::addTableCellChild(AXObject* child, HashSet<AXObject*>& appendedRows, unsigned& columnCount)
56 {
57 if (!child || !child->isTableRow() || child->ariaRoleAttribute() != RowRole)
58 return false;
59
60 AXTableRow* row = toAXTableRow(child);
61 if (appendedRows.contains(row))
62 return false;
63
64 // store the maximum number of columns
65 unsigned rowCellCount = row->children().size();
66 if (rowCellCount > columnCount)
67 columnCount = rowCellCount;
68
69 row->setRowIndex((int)m_rows.size());
70 m_rows.append(row);
71
72 // Try adding the row if it's not ignoring accessibility,
73 // otherwise add its children (the cells) as the grid's children.
74 if (!row->accessibilityIsIgnored())
75 m_children.append(row);
76 else
77 m_children.append(row->children());
78
79 appendedRows.add(row);
80 return true;
81 }
82
addChildren()83 void AXARIAGrid::addChildren()
84 {
85 ASSERT(!m_haveChildren);
86
87 if (!isAXTable()) {
88 AXRenderObject::addChildren();
89 return;
90 }
91
92 m_haveChildren = true;
93 if (!m_renderer)
94 return;
95
96 AXObjectCache* axCache = m_renderer->document().axObjectCache();
97
98 // add only rows that are labeled as aria rows
99 HashSet<AXObject*> appendedRows;
100 unsigned columnCount = 0;
101 for (RefPtr<AXObject> child = firstChild(); child; child = child->nextSibling()) {
102
103 if (!addTableCellChild(child.get(), appendedRows, columnCount)) {
104
105 // in case the render tree doesn't match the expected ARIA hierarchy, look at the children
106 if (!child->hasChildren())
107 child->addChildren();
108
109 // The children of this non-row will contain all non-ignored elements (recursing to find them).
110 // This allows the table to dive arbitrarily deep to find the rows.
111 AccessibilityChildrenVector children = child->children();
112 size_t length = children.size();
113 for (size_t i = 0; i < length; ++i)
114 addTableCellChild(children[i].get(), appendedRows, columnCount);
115 }
116 }
117
118 // make the columns based on the number of columns in the first body
119 for (unsigned i = 0; i < columnCount; ++i) {
120 AXTableColumn* column = toAXTableColumn(axCache->getOrCreate(ColumnRole));
121 column->setColumnIndex((int)i);
122 column->setParent(this);
123 m_columns.append(column);
124 if (!column->accessibilityIsIgnored())
125 m_children.append(column);
126 }
127
128 AXObject* headerContainerObject = headerContainer();
129 if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
130 m_children.append(headerContainerObject);
131 }
132
133 } // namespace WebCore
134