/*

 * Copyright (C) 2007, 2008, 2009 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.

 *

 */

#include "config.h"

#include "CheckedRadioButtons.h"

#include "HTMLInputElement.h"

namespace WebCore {

void CheckedRadioButtons::addButton(HTMLFormControlElement* element)

{

    // We only want to add radio buttons.

    if (!element->isRadioButton())

        return;

    // Without a name, there is no group.

    if (element->name().isEmpty())

        return;

    HTMLInputElement* inputElement = static_cast<HTMLInputElement*>(element);

    // We only track checked buttons.

    if (!inputElement->checked())

        return;

    if (!m_nameToCheckedRadioButtonMap)

        m_nameToCheckedRadioButtonMap.set(new NameToInputMap);

    pair<NameToInputMap::iterator, bool> result = m_nameToCheckedRadioButtonMap->add(element->name().impl(), inputElement);

    if (result.second)

        return;

    HTMLInputElement* oldCheckedButton = result.first->second;

    if (oldCheckedButton == inputElement)

        return;

    result.first->second = inputElement;

    oldCheckedButton->setChecked(false);

}

HTMLInputElement* CheckedRadioButtons::checkedButtonForGroup(const AtomicString& name) const

{

    if (!m_nameToCheckedRadioButtonMap)

        return 0;

    m_nameToCheckedRadioButtonMap->checkConsistency();

    return m_nameToCheckedRadioButtonMap->get(name.impl());

}

void CheckedRadioButtons::removeButton(HTMLFormControlElement* element)

{

    if (element->name().isEmpty() || !m_nameToCheckedRadioButtonMap)

        return;

    m_nameToCheckedRadioButtonMap->checkConsistency();

    NameToInputMap::iterator it = m_nameToCheckedRadioButtonMap->find(element->name().impl());

    if (it == m_nameToCheckedRadioButtonMap->end() || it->second != element)

        return;

    InputElement* inputElement = toInputElement(element);

    ASSERT_UNUSED(inputElement, inputElement);

    ASSERT(inputElement->isChecked());

    ASSERT(element->isRadioButton());

    m_nameToCheckedRadioButtonMap->remove(it);

    if (m_nameToCheckedRadioButtonMap->isEmpty())

        m_nameToCheckedRadioButtonMap.clear();

}

} // namespace