/*

 * (C) 1999-2003 Lars Knoll (knoll@kde.org)

 * Copyright (C) 2004, 2005, 2006, 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 "CSSImageValue.h"

#include "CSSValueKeywords.h"

#include "Cache.h"

#include "CachedImage.h"

#include "DocLoader.h"

#include "StyleCachedImage.h"

namespace WebCore {

CSSImageValue::CSSImageValue(const String& url)

    : CSSPrimitiveValue(url, CSS_URI)

    , m_accessedImage(false)

{

}

CSSImageValue::CSSImageValue()

    : CSSPrimitiveValue(CSSValueNone)

    , m_accessedImage(true)

{

}

CSSImageValue::~CSSImageValue()

{

    if (m_image)

        m_image->cachedImage()->removeClient(this);

}

StyleCachedImage* CSSImageValue::cachedImage(DocLoader* loader)

{

    return cachedImage(loader, getStringValue());

}

StyleCachedImage* CSSImageValue::cachedImage(DocLoader* loader, const String& url)

{

    if (!m_accessedImage) {

        m_accessedImage = true;

        CachedImage* cachedImage = 0;

        if (loader)

            cachedImage = loader->requestImage(url);

        else {

            // FIXME: Should find a way to make these images sit in their own memory partition, since they are user agent images.

            cachedImage = static_cast<CachedImage*>(cache()->requestResource(0, CachedResource::ImageResource, KURL(ParsedURLString, url), String()));

        }

        if (cachedImage) {

            cachedImage->addClient(this);

            m_image = StyleCachedImage::create(cachedImage);

        }

    }

    return m_image.get();

}

String CSSImageValue::cachedImageURL()

{

    if (!m_image)

        return String();

    return m_image->cachedImage()->url();

}

void CSSImageValue::clearCachedImage()

{

    if (m_image)

        m_image->cachedImage()->removeClient(this);

    m_image = 0;

    m_accessedImage = false;

}

} // namespace WebCore