/*

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

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

 * Copyright (C) 2004, 2005, 2006, 2007, 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.

 */

#include "config.h"

#include "HTMLMapElement.h"

#include "Attribute.h"

#include "Document.h"

#include "HTMLAreaElement.h"

#include "HTMLCollection.h"

#include "HTMLImageElement.h"

#include "HTMLNames.h"

#include "HitTestResult.h"

#include "IntSize.h"

#include "RenderObject.h"

using namespace std;

namespace WebCore {

using namespace HTMLNames;

HTMLMapElement::HTMLMapElement(const QualifiedName& tagName, Document* document)

    : HTMLElement(tagName, document)

{

    ASSERT(hasTagName(mapTag));

}

PassRefPtr<HTMLMapElement> HTMLMapElement::create(Document* document)

{

    return adoptRef(new HTMLMapElement(mapTag, document));

}

PassRefPtr<HTMLMapElement> HTMLMapElement::create(const QualifiedName& tagName, Document* document)

{

    return adoptRef(new HTMLMapElement(tagName, document));

}

HTMLMapElement::~HTMLMapElement()

{

}

bool HTMLMapElement::checkDTD(const Node* newChild)

{

    return inEitherTagList(newChild) || newChild->hasTagName(areaTag) // HTML 4 DTD

        || newChild->hasTagName(scriptTag); // extensions

}

bool HTMLMapElement::mapMouseEvent(int x, int y, const IntSize& size, HitTestResult& result)

{

    HTMLAreaElement* defaultArea = 0;

    Node *node = this;

    while ((node = node->traverseNextNode(this))) {

        if (node->hasTagName(areaTag)) {

            HTMLAreaElement* areaElt = static_cast<HTMLAreaElement*>(node);

            if (areaElt->isDefault()) {

                if (!defaultArea)

                    defaultArea = areaElt;

            } else if (areaElt->mapMouseEvent(x, y, size, result))

                return true;

        }

    }

    if (defaultArea) {

        result.setInnerNode(defaultArea);

        result.setURLElement(defaultArea);

    }

    return defaultArea;

}

HTMLImageElement* HTMLMapElement::imageElement() const

{

    RefPtr<HTMLCollection> coll = document()->images();

    for (Node* curr = coll->firstItem(); curr; curr = coll->nextItem()) {

        if (!curr->hasTagName(imgTag))

            continue;

        // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,

        // which has to be stripped off.

        HTMLImageElement* imageElement = static_cast<HTMLImageElement*>(curr);

        String useMapName = imageElement->getAttribute(usemapAttr).string().substring(1);

        if (equalIgnoringCase(useMapName, m_name))

            return imageElement;

    }

    return 0;    

}

void HTMLMapElement::parseMappedAttribute(Attribute* attribute)

{

    // FIXME: This logic seems wrong for XML documents.

    // Either the id or name will be used depending on the order the attributes are parsed.

    const QualifiedName& attrName = attribute->name();

    if (isIdAttributeName(attrName) || attrName == nameAttr) {

        Document* document = this->document();

        if (isIdAttributeName(attrName)) {

            // Call base class so that hasID bit gets set.

            HTMLElement::parseMappedAttribute(attribute);

            if (document->isHTMLDocument())

                return;

        }

        if (inDocument())

            document->removeImageMap(this);

        String mapName = attribute->value();

        if (mapName[0] == '#')

            mapName = mapName.substring(1);

        m_name = document->isHTMLDocument() ? mapName.lower() : mapName;

        if (inDocument())

            document->addImageMap(this);

        return;

    }

    HTMLElement::parseMappedAttribute(attribute);

}

PassRefPtr<HTMLCollection> HTMLMapElement::areas()

{

    return HTMLCollection::create(this, MapAreas);

}

void HTMLMapElement::insertedIntoDocument()

{

    document()->addImageMap(this);

    HTMLElement::insertedIntoDocument();

}

void HTMLMapElement::removedFromDocument()

{

    document()->removeImageMap(this);

    HTMLElement::removedFromDocument();

}

}