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) 2004-2017 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#include <wtf/IsoMallocInlines.h>
32
33namespace WebCore {
34
35WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLLegendElement);
36
37inline HTMLLegendElement::HTMLLegendElement(const QualifiedName& tagName, Document& document)
38 : HTMLElement(tagName, document)
39{
40 ASSERT(hasTagName(HTMLNames::legendTag));
41}
42
43Ref<HTMLLegendElement> HTMLLegendElement::create(const QualifiedName& tagName, Document& document)
44{
45 return adoptRef(*new HTMLLegendElement(tagName, document));
46}
47
48RefPtr<HTMLFormControlElement> 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 restorePreviousSelection, FocusDirection direction)
61{
62 if (document().haveStylesheetsLoaded()) {
63 document().updateLayoutIgnorePendingStylesheets();
64 if (isFocusable()) {
65 Element::focus(restorePreviousSelection, direction);
66 return;
67 }
68 }
69
70 // To match other browsers' behavior, never restore previous selection.
71 if (auto control = associatedControl())
72 control->focus(false, direction);
73}
74
75void HTMLLegendElement::accessKeyAction(bool sendMouseEvents)
76{
77 if (auto control = associatedControl())
78 control->accessKeyAction(sendMouseEvents);
79}
80
81HTMLFormElement* HTMLLegendElement::form() const
82{
83 // According to the specification, If the legend has a fieldset element as
84 // its parent, then the form attribute must return the same value as the
85 // form attribute on that fieldset element. Otherwise, it must return null.
86 auto fieldset = makeRefPtr(parentNode());
87 if (!is<HTMLFieldSetElement>(fieldset))
88 return nullptr;
89 return downcast<HTMLFieldSetElement>(*fieldset).form();
90}
91
92} // namespace
93