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 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 "AccessibilityTableCell.h"
31
32 #include "AXObjectCache.h"
33 #include "HTMLNames.h"
34 #include "RenderObject.h"
35 #include "RenderTableCell.h"
36
37 using namespace std;
38
39 namespace WebCore {
40
41 using namespace HTMLNames;
42
AccessibilityTableCell(RenderObject * renderer)43 AccessibilityTableCell::AccessibilityTableCell(RenderObject* renderer)
44 : AccessibilityRenderObject(renderer)
45 {
46 }
47
~AccessibilityTableCell()48 AccessibilityTableCell::~AccessibilityTableCell()
49 {
50 }
51
create(RenderObject * renderer)52 PassRefPtr<AccessibilityTableCell> AccessibilityTableCell::create(RenderObject* renderer)
53 {
54 return adoptRef(new AccessibilityTableCell(renderer));
55 }
56
accessibilityIsIgnored() const57 bool AccessibilityTableCell::accessibilityIsIgnored() const
58 {
59 if (!isTableCell())
60 return AccessibilityRenderObject::accessibilityIsIgnored();
61
62 return false;
63 }
64
parentTable() const65 AccessibilityObject* AccessibilityTableCell::parentTable() const
66 {
67 if (!m_renderer || !m_renderer->isTableCell())
68 return false;
69
70 return axObjectCache()->getOrCreate(toRenderTableCell(m_renderer)->table());
71 }
72
isTableCell() const73 bool AccessibilityTableCell::isTableCell() const
74 {
75 AccessibilityObject* table = parentTable();
76 if (!table || !table->isDataTable())
77 return false;
78
79 return true;
80 }
81
roleValue() const82 AccessibilityRole AccessibilityTableCell::roleValue() const
83 {
84 if (!isTableCell())
85 return AccessibilityRenderObject::roleValue();
86
87 return CellRole;
88 }
89
rowIndexRange(pair<int,int> & rowRange)90 void AccessibilityTableCell::rowIndexRange(pair<int, int>& rowRange)
91 {
92 if (!m_renderer || !m_renderer->isTableCell())
93 return;
94
95 RenderTableCell* renderCell = toRenderTableCell(m_renderer);
96 rowRange.first = renderCell->row();
97 rowRange.second = renderCell->rowSpan();
98
99 // since our table might have multiple sections, we have to offset our row appropriately
100 RenderTableSection* section = renderCell->section();
101 RenderTable* table = renderCell->table();
102 if (!table || !section)
103 return;
104
105 RenderTableSection* tableSection = table->header();
106 if (!tableSection)
107 tableSection = table->firstBody();
108
109 unsigned rowOffset = 0;
110 while (tableSection) {
111 if (tableSection == section)
112 break;
113 rowOffset += tableSection->numRows();
114 tableSection = table->sectionBelow(tableSection, true);
115 }
116
117 rowRange.first += rowOffset;
118 }
119
columnIndexRange(pair<int,int> & columnRange)120 void AccessibilityTableCell::columnIndexRange(pair<int, int>& columnRange)
121 {
122 if (!m_renderer || !m_renderer->isTableCell())
123 return;
124
125 RenderTableCell* renderCell = toRenderTableCell(m_renderer);
126 columnRange.first = renderCell->col();
127 columnRange.second = renderCell->colSpan();
128 }
129
titleUIElement() const130 AccessibilityObject* AccessibilityTableCell::titleUIElement() const
131 {
132 // Try to find if the first cell in this row is a <th>. If it is,
133 // then it can act as the title ui element. (This is only in the
134 // case when the table is not appearing as an AXTable.)
135 if (isTableCell() || !m_renderer || !m_renderer->isTableCell())
136 return 0;
137
138 // Table cells that are th cannot have title ui elements, since by definition
139 // they are title ui elements
140 Node* node = m_renderer->node();
141 if (node && node->hasTagName(thTag))
142 return 0;
143
144 RenderTableCell* renderCell = toRenderTableCell(m_renderer);
145
146 // If this cell is in the first column, there is no need to continue.
147 int col = renderCell->col();
148 if (!col)
149 return 0;
150
151 int row = renderCell->row();
152
153 RenderTableSection* section = renderCell->section();
154 if (!section)
155 return 0;
156
157 RenderTableCell* headerCell = section->cellAt(row, 0).cell;
158 if (!headerCell || headerCell == renderCell)
159 return 0;
160
161 Node* cellElement = headerCell->node();
162 if (!cellElement || !cellElement->hasTagName(thTag))
163 return 0;
164
165 return axObjectCache()->getOrCreate(headerCell);
166 }
167
168 } // namespace WebCore
169