/*

 * 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, 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 "HTMLTitleElement.h"

#include "Document.h"

#include "HTMLNames.h"

#include "Text.h"

namespace WebCore {

using namespace HTMLNames;

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

    : HTMLElement(tagName, document)

    , m_title("")

{

    ASSERT(hasTagName(titleTag));

}

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

{

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

}

void HTMLTitleElement::insertedIntoDocument()

{

    HTMLElement::insertedIntoDocument();

    document()->setTitle(m_title, this);

}

void HTMLTitleElement::removedFromDocument()

{

    HTMLElement::removedFromDocument();

    document()->removeTitle(this);

}

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

{

    m_title = "";

    for (Node* c = firstChild(); c != 0; c = c->nextSibling())

        if (c->nodeType() == TEXT_NODE || c->nodeType() == CDATA_SECTION_NODE)

            m_title += c->nodeValue();

    if (inDocument())

        document()->setTitle(m_title, this);

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

}

String HTMLTitleElement::text() const

{

    String val = "";

    for (Node *n = firstChild(); n; n = n->nextSibling()) {

        if (n->isTextNode())

            val += static_cast<Text*>(n)->data();

    }

    return val;

}

void HTMLTitleElement::setText(const String &value)

{

    ExceptionCode ec = 0;

    int numChildren = childNodeCount();

    if (numChildren == 1 && firstChild()->isTextNode())

        static_cast<Text*>(firstChild())->setData(value, ec);

    else {  

        // We make a copy here because entity of "value" argument can be Document::m_title,

        // which goes empty during removeChildren() invocation below,

        // which causes HTMLTitleElement::childrenChanged(), which ends up Document::setTitle().

        String valueCopy(value);

        if (numChildren > 0)

            removeChildren();

        appendChild(document()->createTextNode(valueCopy.impl()), ec);

    }

}

}