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/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef HTMLFieldSetElement_h
#define HTMLFieldSetElement_h

#include "core/html/HTMLFormControlElement.h"

namespace WebCore {

class FormAssociatedElement;
class HTMLCollection;
class HTMLFormControlsCollection;

class HTMLFieldSetElement FINAL : public HTMLFormControlElement {
public:
    static PassRefPtrWillBeRawPtr<HTMLFieldSetElement> create(Document&, HTMLFormElement*);
    virtual void trace(Visitor*) OVERRIDE;
    HTMLLegendElement* legend() const;

    PassRefPtrWillBeRawPtr<HTMLFormControlsCollection> elements();

    const FormAssociatedElement::List& associatedElements() const;

protected:
    virtual void disabledAttributeChanged() OVERRIDE;

private:
    HTMLFieldSetElement(Document&, HTMLFormElement*);

    virtual bool isEnumeratable() const OVERRIDE { return true; }
    virtual bool supportsFocus() const OVERRIDE;
    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
    virtual const AtomicString& formControlType() const OVERRIDE;
    virtual bool recalcWillValidate() const OVERRIDE { return false; }
    virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE;
    virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }

    static void invalidateDisabledStateUnder(Element&);
    void refreshElementsIfNeeded() const;

    mutable FormAssociatedElement::List m_associatedElements;
    // When dom tree is modified, we have to refresh the m_associatedElements array.
    mutable uint64_t m_documentVersion;
};

} // namespace

#endif