Source/core/svg/SVGLineElement.cpp

/*
 * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 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"
#include "core/svg/SVGLineElement.h"

#include "core/layout/svg/LayoutSVGShape.h"
#include "core/svg/SVGLength.h"

namespace blink {

inline SVGLineElement::SVGLineElement(Document& document)
    : SVGGeometryElement(SVGNames::lineTag, document)
    , m_x1(SVGAnimatedLength::create(this, SVGNames::x1Attr, SVGLength::create(SVGLengthMode::Width), AllowNegativeLengths))
    , m_y1(SVGAnimatedLength::create(this, SVGNames::y1Attr, SVGLength::create(SVGLengthMode::Height), AllowNegativeLengths))
    , m_x2(SVGAnimatedLength::create(this, SVGNames::x2Attr, SVGLength::create(SVGLengthMode::Width), AllowNegativeLengths))
    , m_y2(SVGAnimatedLength::create(this, SVGNames::y2Attr, SVGLength::create(SVGLengthMode::Height), AllowNegativeLengths))
{
    addToPropertyMap(m_x1);
    addToPropertyMap(m_y1);
    addToPropertyMap(m_x2);
    addToPropertyMap(m_y2);
}

DEFINE_TRACE(SVGLineElement)
{
    visitor->trace(m_x1);
    visitor->trace(m_y1);
    visitor->trace(m_x2);
    visitor->trace(m_y2);
    SVGGeometryElement::trace(visitor);
}

DEFINE_NODE_FACTORY(SVGLineElement)

Path SVGLineElement::asPath() const
{
    Path path;

    SVGLengthContext lengthContext(this);
    path.moveTo(FloatPoint(x1()->currentValue()->value(lengthContext), y1()->currentValue()->value(lengthContext)));
    path.addLineTo(FloatPoint(x2()->currentValue()->value(lengthContext), y2()->currentValue()->value(lengthContext)));

    return path;
}

void SVGLineElement::svgAttributeChanged(const QualifiedName& attrName)
{
    if (attrName == SVGNames::x1Attr
        || attrName == SVGNames::y1Attr
        || attrName == SVGNames::x2Attr
        || attrName == SVGNames::y2Attr) {
        updateRelativeLengthsInformation();

        LayoutSVGShape* layoutObject = toLayoutSVGShape(this->layoutObject());
        if (!layoutObject)
            return;

        SVGElement::InvalidationGuard invalidationGuard(this);
        layoutObject->setNeedsShapeUpdate();
        markForLayoutAndParentResourceInvalidation(layoutObject);
        return;
    }

    SVGGeometryElement::svgAttributeChanged(attrName);
}

bool SVGLineElement::selfHasRelativeLengths() const
{
    return m_x1->currentValue()->isRelative()
        || m_y1->currentValue()->isRelative()
        || m_x2->currentValue()->isRelative()
        || m_y2->currentValue()->isRelative();
}

} // namespace blink