/*

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

 * Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "ContentData.h"

#include "CounterContent.h"

#include "StringImpl.h"

#include "StyleImage.h"

namespace WebCore {

void ContentData::clear()

{

    deleteContent();

    ContentData* n = m_next;

    m_next = 0;

    // Reverse the list so we can delete without recursing.

    ContentData* last = 0;

    ContentData* c;

    while ((c = n)) {

        n = c->m_next;

        c->m_next = last;

        last = c;

    }

    for (c = last; c; c = n) {

        n = c->m_next;

        c->m_next = 0;

        delete c;

    }

}

bool ContentData::dataEquivalent(const ContentData& other) const

{

    if (type() != other.type())

        return false;

    switch (type()) {

        case CONTENT_NONE:

            return true;

            break;

        case CONTENT_TEXT:

            return equal(text(), other.text());

            break;

        case CONTENT_OBJECT:

            return StyleImage::imagesEquivalent(image(), other.image());

            break;

        case CONTENT_COUNTER:

            return *counter() == *other.counter();

            break;

    }

    ASSERT_NOT_REACHED();

    return false;

}

void ContentData::deleteContent()

{

    switch (m_type) {

        case CONTENT_NONE:

            break;

        case CONTENT_OBJECT:

            m_content.m_image->deref();

            break;

        case CONTENT_TEXT:

            m_content.m_text->deref();

            break;

        case CONTENT_COUNTER:

            delete m_content.m_counter;

            break;

    }

    m_type = CONTENT_NONE;

}

} // namespace WebCore