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 "AccessibilityARIAGridCell.h"
31
32#include "AccessibilityObject.h"
33#include "AccessibilityTable.h"
34#include "AccessibilityTableRow.h"
35
36using namespace std;
37
38namespace WebCore {
39
40AccessibilityARIAGridCell::AccessibilityARIAGridCell(RenderObject* renderer)
41    : AccessibilityTableCell(renderer)
42{
43}
44
45AccessibilityARIAGridCell::~AccessibilityARIAGridCell()
46{
47}
48
49PassRefPtr<AccessibilityARIAGridCell> AccessibilityARIAGridCell::create(RenderObject* renderer)
50{
51    return adoptRef(new AccessibilityARIAGridCell(renderer));
52}
53
54AccessibilityObject* AccessibilityARIAGridCell::parentTable() const
55{
56    AccessibilityObject* parent = parentObjectUnignored();
57    if (!parent)
58        return 0;
59
60    if (parent->isAccessibilityTable())
61        return parent;
62
63    // It could happen that we hadn't reached the parent table yet (in
64    // case objects for rows were not ignoring accessibility) so for
65    // that reason we need to run parentObjectUnignored once again.
66    parent = parent->parentObjectUnignored();
67    if (!parent || !parent->isAccessibilityTable())
68        return 0;
69
70    return parent;
71}
72
73void AccessibilityARIAGridCell::rowIndexRange(pair<int, int>& rowRange)
74{
75    AccessibilityObject* parent = parentObjectUnignored();
76    if (!parent)
77        return;
78
79    if (parent->isTableRow()) {
80        // We already got a table row, use its API.
81        rowRange.first = static_cast<AccessibilityTableRow*>(parent)->rowIndex();
82    } else if (parent->isAccessibilityTable()) {
83        // We reached the parent table, so we need to inspect its
84        // children to determine the row index for the cell in it.
85        unsigned columnCount = static_cast<AccessibilityTable*>(parent)->columnCount();
86        if (!columnCount)
87            return;
88
89        AccessibilityChildrenVector siblings = parent->children();
90        unsigned childrenSize = siblings.size();
91        for (unsigned k = 0; k < childrenSize; ++k) {
92            if (siblings[k].get() == this) {
93                rowRange.first = k / columnCount;
94                break;
95            }
96        }
97    }
98
99    // as far as I can tell, grid cells cannot span rows
100    rowRange.second = 1;
101}
102
103void AccessibilityARIAGridCell::columnIndexRange(pair<int, int>& columnRange)
104{
105    AccessibilityObject* parent = parentObjectUnignored();
106    if (!parent)
107        return;
108
109    if (!parent->isTableRow() && !parent->isAccessibilityTable())
110        return;
111
112    AccessibilityChildrenVector siblings = parent->children();
113    unsigned childrenSize = siblings.size();
114    for (unsigned k = 0; k < childrenSize; ++k) {
115        if (siblings[k].get() == this) {
116            columnRange.first = k;
117            break;
118        }
119    }
120
121    // as far as I can tell, grid cells cannot span columns
122    columnRange.second = 1;
123}
124
125} // namespace WebCore
126