1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
6 *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#include "config.h"
26#include "HTMLLegendElement.h"
27
28#include "ElementIterator.h"
29#include "HTMLFieldSetElement.h"
30#include "HTMLNames.h"
31
32namespace WebCore {
33
34using namespace HTMLNames;
35
36
37inline HTMLLegendElement::HTMLLegendElement(const QualifiedName& tagName, Document& document)
38    : HTMLElement(tagName, document)
39{
40    ASSERT(hasTagName(legendTag));
41}
42
43PassRefPtr<HTMLLegendElement> HTMLLegendElement::create(const QualifiedName& tagName, Document& document)
44{
45    return adoptRef(new HTMLLegendElement(tagName, document));
46}
47
48HTMLFormControlElement* HTMLLegendElement::associatedControl()
49{
50    // Check if there's a fieldset belonging to this legend.
51    auto enclosingFieldset = ancestorsOfType<HTMLFieldSetElement>(*this).first();
52    if (!enclosingFieldset)
53        return nullptr;
54
55    // Find first form element inside the fieldset that is not a legend element.
56    // FIXME: Should we consider tabindex?
57    return descendantsOfType<HTMLFormControlElement>(*enclosingFieldset).first();
58}
59
60void HTMLLegendElement::focus(bool, FocusDirection direction)
61{
62    if (isFocusable())
63        Element::focus(true, direction);
64
65    // To match other browsers' behavior, never restore previous selection.
66    if (HTMLFormControlElement* control = associatedControl())
67        control->focus(false, direction);
68}
69
70void HTMLLegendElement::accessKeyAction(bool sendMouseEvents)
71{
72    if (HTMLFormControlElement* control = associatedControl())
73        control->accessKeyAction(sendMouseEvents);
74}
75
76HTMLFormElement* HTMLLegendElement::virtualForm() const
77{
78    // According to the specification, If the legend has a fieldset element as
79    // its parent, then the form attribute must return the same value as the
80    // form attribute on that fieldset element. Otherwise, it must return null.
81    ContainerNode* fieldset = parentNode();
82    if (!fieldset || !fieldset->hasTagName(fieldsetTag))
83        return 0;
84
85    return toHTMLFieldSetElement(fieldset)->form();
86}
87
88} // namespace
89