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 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#ifndef AccessibilityTableCell_h
30#define AccessibilityTableCell_h
31
32#include "AccessibilityRenderObject.h"
33
34namespace WebCore {
35
36class AccessibilityTable;
37
38class AccessibilityTableCell : public AccessibilityRenderObject {
39
40protected:
41    explicit AccessibilityTableCell(RenderObject*);
42public:
43    static PassRefPtr<AccessibilityTableCell> create(RenderObject*);
44    virtual ~AccessibilityTableCell();
45
46    virtual bool isTableCell() const override;
47    bool isTableHeaderCell() const;
48
49    // fills in the start location and row span of cell
50    virtual void rowIndexRange(std::pair<unsigned, unsigned>& rowRange);
51    // fills in the start location and column span of cell
52    virtual void columnIndexRange(std::pair<unsigned, unsigned>& columnRange);
53
54    void columnHeaders(AccessibilityChildrenVector&);
55    void rowHeaders(AccessibilityChildrenVector&);
56
57protected:
58    virtual AccessibilityTable* parentTable() const;
59    int m_rowIndex;
60    virtual AccessibilityRole determineAccessibilityRole() override;
61
62private:
63    // If a table cell is not exposed as a table cell, a TH element can serve as its title UI element.
64    virtual AccessibilityObject* titleUIElement() const override;
65    virtual bool exposesTitleUIElement() const override { return true; }
66    virtual bool computeAccessibilityIsIgnored() const override;
67    virtual String expandedTextValue() const;
68    virtual bool supportsExpandedTextValue() const;
69
70    bool isTableCellInSameRowGroup(AccessibilityTableCell*);
71    bool isTableCellInSameColGroup(AccessibilityTableCell*);
72};
73
74ACCESSIBILITY_OBJECT_TYPE_CASTS(AccessibilityTableCell, isTableCell())
75
76} // namespace WebCore
77
78#endif // AccessibilityTableCell_h
79