/*

    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 "SVGLineElement.h"

#include "Attribute.h"

#include "FloatPoint.h"

#include "RenderPath.h"

#include "RenderSVGResource.h"

#include "SVGLength.h"

#include "SVGNames.h"

namespace WebCore {

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

    : SVGStyledTransformableElement(tagName, doc)

    , SVGTests()

    , SVGLangSpace()

    , SVGExternalResourcesRequired()

    , m_x1(LengthModeWidth)

    , m_y1(LengthModeHeight)

    , m_x2(LengthModeWidth)

    , m_y2(LengthModeHeight)

{

}

SVGLineElement::~SVGLineElement()

{

}

void SVGLineElement::parseMappedAttribute(Attribute* attr)

{

    if (attr->name() == SVGNames::x1Attr)

        setX1BaseValue(SVGLength(LengthModeWidth, attr->value()));

    else if (attr->name() == SVGNames::y1Attr)

        setY1BaseValue(SVGLength(LengthModeHeight, attr->value()));

    else if (attr->name() == SVGNames::x2Attr)

        setX2BaseValue(SVGLength(LengthModeWidth, attr->value()));

    else if (attr->name() == SVGNames::y2Attr)

        setY2BaseValue(SVGLength(LengthModeHeight, attr->value()));

    else {

        if (SVGTests::parseMappedAttribute(attr))

            return;

        if (SVGLangSpace::parseMappedAttribute(attr))

            return;

        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))

            return;

        SVGStyledTransformableElement::parseMappedAttribute(attr);

    }

}

void SVGLineElement::svgAttributeChanged(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::svgAttributeChanged(attrName);

    bool isLengthAttribute = attrName == SVGNames::x1Attr

                          || attrName == SVGNames::y1Attr

                          || attrName == SVGNames::x2Attr

                          || attrName == SVGNames::y2Attr;

    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 SVGLineElement::synchronizeProperty(const QualifiedName& attrName)

{

    SVGStyledTransformableElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {

        synchronizeX1();

        synchronizeY1();

        synchronizeX2();

        synchronizeY2();

        synchronizeExternalResourcesRequired();

        return;

    }

    if (attrName == SVGNames::x1Attr)

        synchronizeX1();

    else if (attrName == SVGNames::y1Attr)

        synchronizeY1();

    else if (attrName == SVGNames::x2Attr)

        synchronizeX2();

    else if (attrName == SVGNames::y2Attr)

        synchronizeY2();

    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))

        synchronizeExternalResourcesRequired();

}

Path SVGLineElement::toPathData() const

{

    return Path::createLine(FloatPoint(x1().value(this), y1().value(this)),

                            FloatPoint(x2().value(this), y2().value(this)));

}

bool SVGLineElement::selfHasRelativeLengths() const

{

    return x1().isRelative()

        || y1().isRelative()

        || x2().isRelative()

        || y2().isRelative();

}

}

#endif // ENABLE(SVG)