/*

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

                  2004, 2005, 2006, 2007 Rob Buis <buis@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 "SVGCircleElement.h"

#include "Attribute.h"

#include "FloatPoint.h"

#include "RenderPath.h"

#include "RenderSVGResource.h"

#include "SVGLength.h"

#include "SVGNames.h"

namespace WebCore {

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

    : SVGStyledTransformableElement(tagName, doc)

    , SVGTests()

    , SVGLangSpace()

    , SVGExternalResourcesRequired()

    , m_cx(LengthModeWidth)

    , m_cy(LengthModeHeight)

    , m_r(LengthModeOther)

{

}

SVGCircleElement::~SVGCircleElement()

{

}

void SVGCircleElement::parseMappedAttribute(Attribute* attr)

{

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

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

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

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

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

        setRBaseValue(SVGLength(LengthModeOther, attr->value()));

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

            document()->accessSVGExtensions()->reportError("A negative value for circle <r> is not allowed");

    } else {

        if (SVGTests::parseMappedAttribute(attr))

            return;

        if (SVGLangSpace::parseMappedAttribute(attr))

            return;

        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))

            return;

        SVGStyledTransformableElement::parseMappedAttribute(attr);

    }

}

void SVGCircleElement::svgAttributeChanged(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::svgAttributeChanged(attrName);

    bool isLengthAttribute = attrName == SVGNames::cxAttr

                          || attrName == SVGNames::cyAttr

                          || attrName == SVGNames::rAttr;

    if (isLengthAttribute)

        updateRelativeLengthsInformation();

    RenderPath* renderer = static_cast<RenderPath*>(this->renderer());

    if (!renderer)

        return;

    if (SVGStyledTransformableElement::isKnownAttribute(attrName)) {

        renderer->setNeedsTransformUpdate();

        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);

        return;

    }

    if (isLengthAttribute) {

        renderer->setNeedsPathUpdate();

        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);

        return;

    }

    if (SVGTests::isKnownAttribute(attrName)

        || SVGLangSpace::isKnownAttribute(attrName)

        || SVGExternalResourcesRequired::isKnownAttribute(attrName))

        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);

}

void SVGCircleElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizeCx();

        synchronizeCy();

        synchronizeR();

        synchronizeExternalResourcesRequired();

        return;

    }

    if (attrName == SVGNames::cxAttr)

        synchronizeCx();

    else if (attrName == SVGNames::cyAttr)

        synchronizeCy();

    else if (attrName == SVGNames::rAttr)

        synchronizeR();

    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))

        synchronizeExternalResourcesRequired();

}

Path SVGCircleElement::toPathData() const

{

    return Path::createCircle(FloatPoint(cx().value(this), cy().value(this)), r().value(this));

}

bool SVGCircleElement::selfHasRelativeLengths() const

{

    return cx().isRelative()

        || cy().isRelative()

        || r().isRelative();

}

}

#endif // ENABLE(SVG)