/*
    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)