/*
 * Copyright (C) 1999 Lars Knoll <knoll@kde.org>
 * Copyright (C) 1999 Antti Koivisto <koivisto@kde.org>
 * Copyright (C) 2000 Dirk Mueller <mueller@kde.org>
 * Copyright (C) 2006 Allan Sandfeld Jensen <kde@carewolf.com>
 * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
 *
 * 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 "core/layout/LayoutImageResource.h"

#include "core/html/HTMLImageElement.h"
#include "core/layout/LayoutImage.h"
#include "core/svg/graphics/SVGImageForContainer.h"

namespace blink {

LayoutImageResource::LayoutImageResource()
    : m_layoutObject(nullptr)
    , m_cachedImage(nullptr)
{
}

LayoutImageResource::~LayoutImageResource()
{
}

void LayoutImageResource::initialize(LayoutObject* layoutObject)
{
    ASSERT(!m_layoutObject);
    ASSERT(layoutObject);
    m_layoutObject = layoutObject;
}

void LayoutImageResource::shutdown()
{
    ASSERT(m_layoutObject);

    if (m_cachedImage)
        m_cachedImage->removeClient(m_layoutObject);
}

void LayoutImageResource::setImageResource(ImageResource* newImage)
{
    ASSERT(m_layoutObject);

    if (m_cachedImage == newImage)
        return;

    if (m_cachedImage)
        m_cachedImage->removeClient(m_layoutObject);
    m_cachedImage = newImage;
    if (m_cachedImage) {
        m_cachedImage->addClient(m_layoutObject);
        if (m_cachedImage->errorOccurred())
            m_layoutObject->imageChanged(m_cachedImage.get());
    } else {
        m_layoutObject->imageChanged(m_cachedImage.get());
    }
}

void LayoutImageResource::resetAnimation()
{
    ASSERT(m_layoutObject);

    if (!m_cachedImage)
        return;

    m_cachedImage->image()->resetAnimation();

    m_layoutObject->setShouldDoFullPaintInvalidation();
}

LayoutSize LayoutImageResource::imageSize(float multiplier) const
{
    if (!m_cachedImage)
        return LayoutSize();
    LayoutSize size = m_cachedImage->imageSizeForLayoutObject(m_layoutObject, multiplier, ImageResource::IntrinsicSize);
    if (m_layoutObject && m_layoutObject->isLayoutImage() && size.width() && size.height())
        size.scale(toLayoutImage(m_layoutObject)->imageDevicePixelRatio());
    return size;
}

PassRefPtr<Image> LayoutImageResource::image(const IntSize& containerSize, float zoom) const
{
    RefPtr<Image> image = m_cachedImage ? m_cachedImage->image() : Image::nullImage();
    if (image->isSVGImage()) {
        SVGImage* svgImage = toSVGImage(image.get());
        Node* node = m_layoutObject->node();
        if (node && isHTMLImageElement(node)) {
            const AtomicString& urlString = toHTMLImageElement(node)->imageSourceURL();
            KURL url = node->document().completeURL(urlString);
            svgImage->setURL(url);
        }
        return SVGImageForContainer::create(svgImage, containerSize, zoom);
    }
    return image;
}

bool LayoutImageResource::maybeAnimated() const
{
    Image* image = m_cachedImage ? m_cachedImage->image() : Image::nullImage();
    return image->maybeAnimated();
}

} // namespace blink