/*

 * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.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 "OptionElement.h"

#include "Document.h"

#include "Element.h"

#include "HTMLNames.h"

#include "HTMLOptionElement.h"

#include "OptionGroupElement.h"

#include "ScriptElement.h"

#include "SelectElement.h"

#include <wtf/Assertions.h>

#if ENABLE(WML)

#include "WMLOptionElement.h"

#include "WMLNames.h"

#endif

namespace WebCore {

void OptionElement::setSelectedState(OptionElementData& data, Element* element, bool selected)

{

    if (data.selected() == selected)

        return;

    data.setSelected(selected);

    element->setNeedsStyleRecalc();

}

int OptionElement::optionIndex(SelectElement* selectElement, const Element* element)

{

    if (!selectElement)

        return 0;

    // Let's do this dynamically. Might be a bit slow, but we're sure

    // we won't forget to update a member variable in some cases...

    const Vector<Element*>& items = selectElement->listItems();

    int length = items.size();

    int optionIndex = 0;

    for (int i = 0; i < length; ++i) {

        if (!isOptionElement(items[i]))

            continue;

        if (items[i] == element)

            return optionIndex;

        ++optionIndex;

    }

    return 0;

}

String OptionElement::collectOptionLabelOrText(const OptionElementData& data, const Element* element)

{

    Document* document = element->document();

    String text;

    // WinIE does not use the label attribute, so as a quirk, we ignore it.

    if (!document->inCompatMode())

        text = data.label();

    if (text.isEmpty())

        text = collectOptionInnerText(element);

    return normalizeText(document, text);

}

String OptionElement::collectOptionInnerText(const Element* element)

{

    String text;

    Node* n = element->firstChild();

    while (n) {

        if (n->nodeType() == Node::TEXT_NODE || n->nodeType() == Node::CDATA_SECTION_NODE)

            text += n->nodeValue();

        // skip script content

        if (n->isElementNode() && toScriptElement(static_cast<Element*>(n)))

            n = n->traverseNextSibling(element);

        else

            n = n->traverseNextNode(element);

    }

    return text;

}

String OptionElement::normalizeText(const Document* document, const String& src)

{

    String text = document->displayStringModifiedByEncoding(src);

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

    text = text.stripWhiteSpace();

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

    text = text.simplifyWhiteSpace();

    return text;

}

String OptionElement::collectOptionTextRespectingGroupLabel(const OptionElementData& data, const Element* element)

{

    Element* parentElement = static_cast<Element*>(element->parentNode());

    if (parentElement && toOptionGroupElement(parentElement))

        return "    " + collectOptionLabelOrText(data, element);

    return collectOptionLabelOrText(data, element);

}

String OptionElement::collectOptionValue(const OptionElementData& data, const Element* element)

{

    String value = data.value();

    if (!value.isNull())

        return value;

    // Use the text if the value wasn't set.

    return collectOptionInnerText(element).stripWhiteSpace();

}

// OptionElementData

OptionElementData::OptionElementData()

    : m_selected(false)

{

}

OptionElement* toOptionElement(Element* element)

{

    if (element->isHTMLElement() && element->hasTagName(HTMLNames::optionTag))

        return static_cast<HTMLOptionElement*>(element);

#if ENABLE(WML)

    if (element->isWMLElement() && element->hasTagName(WMLNames::optionTag))

        return static_cast<WMLOptionElement*>(element);

#endif

    return 0;

}

bool isOptionElement(Element* element)

{

    return element->hasLocalName(HTMLNames::optionTag)

#if ENABLE(WML)

        || element->hasLocalName(WMLNames::optionTag)

#endif

        ;

}

}