/*

    Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>

                  2004, 2005, 2006, 2007, 2008, 2009 Rob Buis <buis@kde.org>

                  2006 Alexander Kellett <lypanov@kde.org>

    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"

#if ENABLE(SVG)

#include "SVGImageElement.h"

#include "Attribute.h"

#include "CSSPropertyNames.h"

#include "RenderSVGImage.h"

#include "RenderSVGResource.h"

#include "SVGDocument.h"

#include "SVGLength.h"

#include "SVGPreserveAspectRatio.h"

#include "SVGSVGElement.h"

#include "XLinkNames.h"

namespace WebCore {

SVGImageElement::SVGImageElement(const QualifiedName& tagName, Document* doc)

    : SVGStyledTransformableElement(tagName, doc)

    , SVGTests()

    , SVGLangSpace()

    , SVGExternalResourcesRequired()

    , SVGURIReference()

    , m_x(LengthModeWidth)

    , m_y(LengthModeHeight)

    , m_width(LengthModeWidth)

    , m_height(LengthModeHeight)

    , m_imageLoader(this)

{

}

SVGImageElement::~SVGImageElement()

{

}

void SVGImageElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == SVGNames::xAttr)

        setXBaseValue(SVGLength(LengthModeWidth, attr->value()));

    else if (attr->name() == SVGNames::yAttr)

        setYBaseValue(SVGLength(LengthModeHeight, attr->value()));

    else if (attr->name() == SVGNames::preserveAspectRatioAttr)

        SVGPreserveAspectRatio::parsePreserveAspectRatio(this, attr->value());

    else if (attr->name() == SVGNames::widthAttr) {

        setWidthBaseValue(SVGLength(LengthModeWidth, attr->value()));

        addCSSProperty(attr, CSSPropertyWidth, attr->value());

        if (widthBaseValue().value(this) < 0.0)

            document()->accessSVGExtensions()->reportError("A negative value for image attribute <width> is not allowed");

    } else if (attr->name() == SVGNames::heightAttr) {

        setHeightBaseValue(SVGLength(LengthModeHeight, attr->value()));

        addCSSProperty(attr, CSSPropertyHeight, attr->value());

        if (heightBaseValue().value(this) < 0.0)

            document()->accessSVGExtensions()->reportError("A negative value for image attribute <height> is not allowed");

    } else {

        if (SVGTests::parseMappedAttribute(attr))

            return;

        if (SVGLangSpace::parseMappedAttribute(attr))

            return;

        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))

            return;

        if (SVGURIReference::parseMappedAttribute(attr))

            return;

        SVGStyledTransformableElement::parseMappedAttribute(attr);

    }

}

void SVGImageElement::svgAttributeChanged(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::svgAttributeChanged(attrName);

    if (SVGURIReference::isKnownAttribute(attrName))

        m_imageLoader.updateFromElementIgnoringPreviousError();

    bool isLengthAttribute = attrName == SVGNames::xAttr

                          || attrName == SVGNames::yAttr

                          || attrName == SVGNames::widthAttr

                          || attrName == SVGNames::heightAttr;

    if (isLengthAttribute)

        updateRelativeLengthsInformation();

    RenderObject* renderer = this->renderer();

    if (!renderer)

        return;

    if (SVGStyledTransformableElement::isKnownAttribute(attrName)) {

        renderer->setNeedsTransformUpdate();

        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);

        return;

    }

    if (isLengthAttribute

        || attrName == SVGNames::preserveAspectRatioAttr

        || SVGTests::isKnownAttribute(attrName)

        || SVGLangSpace::isKnownAttribute(attrName)

        || SVGExternalResourcesRequired::isKnownAttribute(attrName))

        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);

}

void SVGImageElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizeX();

        synchronizeY();

        synchronizeWidth();

        synchronizeHeight();

        synchronizePreserveAspectRatio();

        synchronizeExternalResourcesRequired();

        synchronizeHref();

        return;

    }

    if (attrName == SVGNames::xAttr)

        synchronizeX();

    else if (attrName == SVGNames::yAttr)

        synchronizeY();

    else if (attrName == SVGNames::widthAttr)

        synchronizeWidth();

    else if (attrName == SVGNames::heightAttr)

        synchronizeHeight();

    else if (attrName == SVGNames::preserveAspectRatioAttr)

        synchronizePreserveAspectRatio();

    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))

        synchronizeExternalResourcesRequired();

    else if (SVGURIReference::isKnownAttribute(attrName))

        synchronizeHref();

}

bool SVGImageElement::selfHasRelativeLengths() const

{

    return x().isRelative()

        || y().isRelative()

        || width().isRelative()

        || height().isRelative();

}

RenderObject* SVGImageElement::createRenderer(RenderArena* arena, RenderStyle*)

{

    return new (arena) RenderSVGImage(this);

}

bool SVGImageElement::haveLoadedRequiredResources()

{

    return !externalResourcesRequiredBaseValue() || m_imageLoader.haveFiredLoadEvent();

}

void SVGImageElement::attach()

{

    SVGStyledTransformableElement::attach();

    if (RenderImage* imageObj = toRenderImage(renderer())) {

        if (imageObj->hasImage())

            return;

        imageObj->setCachedImage(m_imageLoader.image());

    }

}

void SVGImageElement::insertedIntoDocument()

{

    SVGStyledTransformableElement::insertedIntoDocument();

    // Update image loader, as soon as we're living in the tree.

    // We can only resolve base URIs properly, after that!

    m_imageLoader.updateFromElement();

}

const QualifiedName& SVGImageElement::imageSourceAttributeName() const

{

    return XLinkNames::hrefAttr;

}

void SVGImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const

{

    SVGStyledTransformableElement::addSubresourceAttributeURLs(urls);

    addSubresourceURL(urls, document()->completeURL(href()));

}

void SVGImageElement::willMoveToNewOwnerDocument()

{

    m_imageLoader.elementWillMoveToNewOwnerDocument();

    SVGStyledTransformableElement::willMoveToNewOwnerDocument();

}

}

#endif // ENABLE(SVG)