summaryrefslogtreecommitdiffstats
path: root/Source/WebCore/accessibility/AccessibilityTableColumn.cpp
blob: f776e4050e53d767bc17a4bc2ead1892eeaaadfc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "AccessibilityTableColumn.h"

#include "AXObjectCache.h"
#include "AccessibilityTableCell.h"
#include "HTMLNames.h"
#include "RenderTable.h"
#include "RenderTableCell.h"
#include "RenderTableSection.h"

using namespace std;

namespace WebCore {
    
using namespace HTMLNames;

AccessibilityTableColumn::AccessibilityTableColumn()
    : m_parentTable(0)
{
}

AccessibilityTableColumn::~AccessibilityTableColumn()
{
}    

PassRefPtr<AccessibilityTableColumn> AccessibilityTableColumn::create()
{
    return adoptRef(new AccessibilityTableColumn());
}

void AccessibilityTableColumn::setParentTable(AccessibilityTable* table)
{
    m_parentTable = table;
    
    clearChildren();
}
    
IntRect AccessibilityTableColumn::elementRect() const
{
    // this will be filled in when addChildren is called
    return m_columnRect;
}

IntSize AccessibilityTableColumn::size() const
{
    return elementRect().size();
}
  
const AccessibilityObject::AccessibilityChildrenVector& AccessibilityTableColumn::children()
{
    if (!m_haveChildren)
        addChildren();
    return m_children;
}
    
AccessibilityObject* AccessibilityTableColumn::headerObject()
{
    if (!m_parentTable)
        return 0;
    
    RenderObject* renderer = m_parentTable->renderer();
    if (!renderer)
        return 0;
    
    if (m_parentTable->isAriaTable()) {
        AccessibilityChildrenVector rowChildren = children();
        unsigned childrenCount = rowChildren.size();
        for (unsigned i = 0; i < childrenCount; ++i) {
            AccessibilityObject* cell = rowChildren[i].get();
            if (cell->ariaRoleAttribute() == ColumnHeaderRole)
                return cell;
        }
        
        return 0;
    }

    if (!renderer->isTable())
        return 0;
    
    RenderTable* table = toRenderTable(renderer);
    
    AccessibilityObject* headerObject = 0;
    
    // try the <thead> section first. this doesn't require th tags
    headerObject = headerObjectForSection(table->header(), false);

    if (headerObject)
        return headerObject;
    
    // now try for <th> tags in the first body
    headerObject = headerObjectForSection(table->firstBody(), true);

    return headerObject;
}

AccessibilityObject* AccessibilityTableColumn::headerObjectForSection(RenderTableSection* section, bool thTagRequired)
{
    if (!section)
        return 0;
    
    int numCols = section->numColumns();
    if (m_columnIndex >= numCols)
        return 0;
    
    if (!section->numRows())
        return 0;
    
    RenderTableCell* cell = 0;
    // also account for cells that have a span
    for (int testCol = m_columnIndex; testCol >= 0; --testCol) {
        RenderTableCell* testCell = section->primaryCellAt(0, testCol);
        if (!testCell)
            continue;
        
        // we've reached a cell that doesn't even overlap our column 
        // it can't be our header
        if ((testCell->col() + (testCell->colSpan()-1)) < m_columnIndex)
            break;
        
        Node* node = testCell->node();
        if (!node)
            continue;
        
        if (thTagRequired && !node->hasTagName(thTag))
            continue;
        
        cell = testCell;
    }
    
    if (!cell)
        return 0;

    return m_parentTable->axObjectCache()->getOrCreate(cell);
}
    
bool AccessibilityTableColumn::accessibilityIsIgnored() const
{
    if (!m_parentTable)
        return true;
    
#if PLATFORM(GTK)
    return true;
#endif
    
    return m_parentTable->accessibilityIsIgnored();
}
    
void AccessibilityTableColumn::addChildren()
{
    ASSERT(!m_haveChildren); 
    
    m_haveChildren = true;
    if (!m_parentTable)
        return;
    
    int numRows = m_parentTable->rowCount();
    
    for (int i = 0; i < numRows; i++) {
        AccessibilityTableCell* cell = m_parentTable->cellForColumnAndRow(m_columnIndex, i);
        if (!cell)
            continue;
        
        // make sure the last one isn't the same as this one (rowspan cells)
        if (m_children.size() > 0 && m_children.last() == cell)
            continue;
            
        m_children.append(cell);
        m_columnRect.unite(cell->elementRect());
    }
}
    
} // namespace WebCore