/*

 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 *           (C) 2001 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.

 *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)

 *

 * 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.

 *

 */

#include "config.h"

#include "HTMLOptGroupElement.h"

#include "CSSStyleSelector.h"

#include "Document.h"

#include "HTMLNames.h"

#include "HTMLSelectElement.h"

#include "RenderMenuList.h"

#include "NodeRenderStyle.h"

#include <wtf/StdLibExtras.h>

namespace WebCore {

using namespace HTMLNames;

inline HTMLOptGroupElement::HTMLOptGroupElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)

    : HTMLFormControlElement(tagName, document, form)

{

    ASSERT(hasTagName(optgroupTag));

}

PassRefPtr<HTMLOptGroupElement> HTMLOptGroupElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)

{

    return adoptRef(new HTMLOptGroupElement(tagName, document, form));

}

bool HTMLOptGroupElement::supportsFocus() const

{

    return HTMLElement::supportsFocus();

}

bool HTMLOptGroupElement::isFocusable() const

{

    // Optgroup elements do not have a renderer so we check the renderStyle instead.

    return supportsFocus() && renderStyle() && renderStyle()->display() != NONE;

}

const AtomicString& HTMLOptGroupElement::formControlType() const

{

    DEFINE_STATIC_LOCAL(const AtomicString, optgroup, ("optgroup"));

    return optgroup;

}

void HTMLOptGroupElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)

{

    recalcSelectOptions();

    HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);

}

void HTMLOptGroupElement::parseMappedAttribute(Attribute* attr)

{

    HTMLFormControlElement::parseMappedAttribute(attr);

    recalcSelectOptions();

}

void HTMLOptGroupElement::recalcSelectOptions()

{

    Node* select = parentNode();

    while (select && !select->hasTagName(selectTag))

        select = select->parentNode();

    if (select)

        static_cast<HTMLSelectElement*>(select)->setRecalcListItems();

}

bool HTMLOptGroupElement::checkDTD(const Node* newChild)

{

    // Make sure to keep this in sync with <select> (other than not allowing an optgroup).

    return newChild->isTextNode() || newChild->hasTagName(HTMLNames::optionTag) || newChild->hasTagName(HTMLNames::hrTag) || newChild->hasTagName(HTMLNames::scriptTag);

}

void HTMLOptGroupElement::attach()

{

    if (parentNode()->renderStyle())

        setRenderStyle(styleForRenderer());

    HTMLFormControlElement::attach();

}

void HTMLOptGroupElement::detach()

{

    m_style.clear();

    HTMLFormControlElement::detach();

}

void HTMLOptGroupElement::setRenderStyle(PassRefPtr<RenderStyle> newStyle)

{

    m_style = newStyle;

}

RenderStyle* HTMLOptGroupElement::nonRendererRenderStyle() const 

{ 

    return m_style.get(); 

}

String HTMLOptGroupElement::groupLabelText() const

{

    String itemText = document()->displayStringModifiedByEncoding(getAttribute(labelAttr));

    // In WinIE, leading and trailing whitespace is ignored in options and optgroups. We match this behavior.

    itemText = itemText.stripWhiteSpace();

    // We want to collapse our whitespace too.  This will match other browsers.

    itemText = itemText.simplifyWhiteSpace();

    return itemText;

}

HTMLSelectElement* HTMLOptGroupElement::ownerSelectElement() const

{

    Node* select = parentNode();

    while (select && !select->hasTagName(selectTag))

        select = select->parentNode();

    if (!select)

       return 0;

    return static_cast<HTMLSelectElement*>(select);

}

void HTMLOptGroupElement::accessKeyAction(bool)

{

    HTMLSelectElement* select = ownerSelectElement();

    // send to the parent to bring focus to the list box

    if (select && !select->focused())

        select->accessKeyAction(false);

}

} // namespace