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 "core/html/HTMLFieldSetElement.h"
27
28#include "core/HTMLNames.h"
29#include "core/dom/ElementTraversal.h"
30#include "core/dom/NodeListsNodeData.h"
31#include "core/html/HTMLCollection.h"
32#include "core/html/HTMLFormControlsCollection.h"
33#include "core/html/HTMLLegendElement.h"
34#include "core/html/HTMLObjectElement.h"
35#include "core/rendering/RenderFieldset.h"
36#include "wtf/StdLibExtras.h"
37
38namespace blink {
39
40using namespace HTMLNames;
41
42inline HTMLFieldSetElement::HTMLFieldSetElement(Document& document, HTMLFormElement* form)
43    : HTMLFormControlElement(fieldsetTag, document, form)
44    , m_documentVersion(0)
45{
46}
47
48PassRefPtrWillBeRawPtr<HTMLFieldSetElement> HTMLFieldSetElement::create(Document& document, HTMLFormElement* form)
49{
50    return adoptRefWillBeNoop(new HTMLFieldSetElement(document, form));
51}
52
53void HTMLFieldSetElement::trace(Visitor* visitor)
54{
55#if ENABLE(OILPAN)
56    visitor->trace(m_associatedElements);
57#endif
58    HTMLFormControlElement::trace(visitor);
59}
60
61void HTMLFieldSetElement::invalidateDisabledStateUnder(Element& base)
62{
63    for (HTMLFormControlElement* element = Traversal<HTMLFormControlElement>::firstWithin(base); element; element = Traversal<HTMLFormControlElement>::next(*element, &base))
64        element->ancestorDisabledStateWasChanged();
65}
66
67void HTMLFieldSetElement::disabledAttributeChanged()
68{
69    // This element must be updated before the style of nodes in its subtree gets recalculated.
70    HTMLFormControlElement::disabledAttributeChanged();
71    invalidateDisabledStateUnder(*this);
72}
73
74void HTMLFieldSetElement::childrenChanged(const ChildrenChange& change)
75{
76    HTMLFormControlElement::childrenChanged(change);
77    for (HTMLLegendElement* legend = Traversal<HTMLLegendElement>::firstChild(*this); legend; legend = Traversal<HTMLLegendElement>::nextSibling(*legend))
78        invalidateDisabledStateUnder(*legend);
79}
80
81bool HTMLFieldSetElement::supportsFocus() const
82{
83    return HTMLElement::supportsFocus();
84}
85
86const AtomicString& HTMLFieldSetElement::formControlType() const
87{
88    DEFINE_STATIC_LOCAL(const AtomicString, fieldset, ("fieldset", AtomicString::ConstructFromLiteral));
89    return fieldset;
90}
91
92RenderObject* HTMLFieldSetElement::createRenderer(RenderStyle*)
93{
94    return new RenderFieldset(this);
95}
96
97HTMLLegendElement* HTMLFieldSetElement::legend() const
98{
99    return Traversal<HTMLLegendElement>::firstChild(*this);
100}
101
102PassRefPtrWillBeRawPtr<HTMLFormControlsCollection> HTMLFieldSetElement::elements()
103{
104    return ensureCachedCollection<HTMLFormControlsCollection>(FormControls);
105}
106
107void HTMLFieldSetElement::refreshElementsIfNeeded() const
108{
109    uint64_t docVersion = document().domTreeVersion();
110    if (m_documentVersion == docVersion)
111        return;
112
113    m_documentVersion = docVersion;
114
115    m_associatedElements.clear();
116
117    for (HTMLElement* element = Traversal<HTMLElement>::firstWithin(*this); element; element = Traversal<HTMLElement>::next(*element, this)) {
118        if (isHTMLObjectElement(*element)) {
119            m_associatedElements.append(toHTMLObjectElement(element));
120            continue;
121        }
122
123        if (!element->isFormControlElement())
124            continue;
125
126        m_associatedElements.append(toHTMLFormControlElement(element));
127    }
128}
129
130const FormAssociatedElement::List& HTMLFieldSetElement::associatedElements() const
131{
132    refreshElementsIfNeeded();
133    return m_associatedElements;
134}
135
136} // namespace
137