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 "HTMLFieldSetElement.h"
29#include "HTMLFormControlElement.h"
30#include "HTMLNames.h"
31#include "NodeTraversal.h"
32#include <wtf/StdLibExtras.h>
33
34namespace WebCore {
35
36using namespace HTMLNames;
37
38
39inline HTMLLegendElement::HTMLLegendElement(const QualifiedName& tagName, Document* document)
40    : HTMLElement(tagName, document)
41{
42    ASSERT(hasTagName(legendTag));
43}
44
45PassRefPtr<HTMLLegendElement> HTMLLegendElement::create(const QualifiedName& tagName, Document* document)
46{
47    return adoptRef(new HTMLLegendElement(tagName, document));
48}
49
50HTMLFormControlElement* HTMLLegendElement::associatedControl()
51{
52    // Check if there's a fieldset belonging to this legend.
53    Element* fieldset = parentElement();
54    while (fieldset && !fieldset->hasTagName(fieldsetTag))
55        fieldset = fieldset->parentElement();
56    if (!fieldset)
57        return 0;
58
59    // Find first form element inside the fieldset that is not a legend element.
60    // FIXME: Should we consider tabindex?
61    Element* element = fieldset;
62    while ((element = ElementTraversal::next(element, fieldset))) {
63        if (element->isFormControlElement())
64            return static_cast<HTMLFormControlElement*>(element);
65    }
66
67    return 0;
68}
69
70void HTMLLegendElement::focus(bool, FocusDirection direction)
71{
72    if (isFocusable())
73        Element::focus(true, direction);
74
75    // To match other browsers' behavior, never restore previous selection.
76    if (HTMLFormControlElement* control = associatedControl())
77        control->focus(false, direction);
78}
79
80void HTMLLegendElement::accessKeyAction(bool sendMouseEvents)
81{
82    if (HTMLFormControlElement* control = associatedControl())
83        control->accessKeyAction(sendMouseEvents);
84}
85
86HTMLFormElement* HTMLLegendElement::virtualForm() const
87{
88    // According to the specification, If the legend has a fieldset element as
89    // its parent, then the form attribute must return the same value as the
90    // form attribute on that fieldset element. Otherwise, it must return null.
91    ContainerNode* fieldset = parentNode();
92    if (!fieldset || !fieldset->hasTagName(fieldsetTag))
93        return 0;
94
95    return static_cast<HTMLFieldSetElement*>(fieldset)->form();
96}
97
98} // namespace
99