/*

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

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

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

 * Copyright (C) 2003, 2008, 2009, 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 "HTMLBaseElement.h"

#include "Attribute.h"

#include "CSSHelper.h"

#include "Document.h"

#include "Frame.h"

#include "HTMLNames.h"

#include "XSSAuditor.h"

namespace WebCore {

using namespace HTMLNames;

inline HTMLBaseElement::HTMLBaseElement(const QualifiedName& tagName, Document* document)

    : HTMLElement(tagName, document)

{

    ASSERT(hasTagName(baseTag));

}

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

{

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

}

void HTMLBaseElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == hrefAttr) {

        m_hrefAttrValue = attr->value();

        m_href = deprecatedParseURL(attr->value());

        process();

    } else if (attr->name() == targetAttr) {

        m_target = attr->value();

        process();

    } else

        HTMLElement::parseMappedAttribute(attr);

}

void HTMLBaseElement::insertedIntoDocument()

{

    HTMLElement::insertedIntoDocument();

    process();

}

void HTMLBaseElement::removedFromDocument()

{

    HTMLElement::removedFromDocument();

    // Since the document doesn't have a base element, clear the base URL and target.

    // FIXME: This does not handle the case of multiple base elements correctly.

    document()->setBaseElementURL(KURL());

    document()->setBaseElementTarget(String());

}

void HTMLBaseElement::process()

{

    if (!inDocument())

        return;

    if (!m_href.isEmpty() && (!document()->frame() || document()->frame()->script()->xssAuditor()->canSetBaseElementURL(m_hrefAttrValue)))

        document()->setBaseElementURL(KURL(document()->url(), m_href));

    if (!m_target.isEmpty())

        document()->setBaseElementTarget(m_target);

    // FIXME: Changing a document's base URL should probably automatically update the resolved relative URLs of all images, stylesheets, etc.

}

}