WebCore/svg/SVGPathElement.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"

#if ENABLE(SVG)
#include "SVGPathElement.h"

#include "Attribute.h"
#include "RenderPath.h"
#include "RenderSVGResource.h"
#include "SVGNames.h"
#include "SVGPathParserFactory.h"
#include "SVGPathSegArc.h"
#include "SVGPathSegClosePath.h"
#include "SVGPathSegCurvetoCubic.h"
#include "SVGPathSegCurvetoCubicSmooth.h"
#include "SVGPathSegCurvetoQuadratic.h"
#include "SVGPathSegCurvetoQuadraticSmooth.h"
#include "SVGPathSegLineto.h"
#include "SVGPathSegLinetoHorizontal.h"
#include "SVGPathSegLinetoVertical.h"
#include "SVGPathSegList.h"
#include "SVGPathSegListBuilder.h"
#include "SVGPathSegMoveto.h"
#include "SVGSVGElement.h"

namespace WebCore {

inline SVGPathElement::SVGPathElement(const QualifiedName& tagName, Document* document)
    : SVGStyledTransformableElement(tagName, document)
{
}

PassRefPtr<SVGPathElement> SVGPathElement::create(const QualifiedName& tagName, Document* document)
{
    return adoptRef(new SVGPathElement(tagName, document));
}

float SVGPathElement::getTotalLength()
{
    // FIXME: this may wish to use the pathSegList instead of the pathdata if that's cheaper to build (or cached)
    return toPathData().length();
}

FloatPoint SVGPathElement::getPointAtLength(float length)
{
    // FIXME: this may wish to use the pathSegList instead of the pathdata if that's cheaper to build (or cached)
    bool ok = false;
    return toPathData().pointAtLength(length, ok);
}

unsigned long SVGPathElement::getPathSegAtLength(float length)
{
    SVGPathParserFactory* factory = SVGPathParserFactory::self();
    unsigned long pathSeg = 0;
    factory->getSVGPathSegAtLengthFromSVGPathSegList(pathSegList(), length, pathSeg);
    return pathSeg;
}

PassRefPtr<SVGPathSegClosePath> SVGPathElement::createSVGPathSegClosePath()
{
    return SVGPathSegClosePath::create();
}

PassRefPtr<SVGPathSegMovetoAbs> SVGPathElement::createSVGPathSegMovetoAbs(float x, float y)
{
    return SVGPathSegMovetoAbs::create(x, y);
}

PassRefPtr<SVGPathSegMovetoRel> SVGPathElement::createSVGPathSegMovetoRel(float x, float y)
{
    return SVGPathSegMovetoRel::create(x, y);
}

PassRefPtr<SVGPathSegLinetoAbs> SVGPathElement::createSVGPathSegLinetoAbs(float x, float y)
{
    return SVGPathSegLinetoAbs::create(x, y);
}

PassRefPtr<SVGPathSegLinetoRel> SVGPathElement::createSVGPathSegLinetoRel(float x, float y)
{
    return SVGPathSegLinetoRel::create(x, y);
}

PassRefPtr<SVGPathSegCurvetoCubicAbs> SVGPathElement::createSVGPathSegCurvetoCubicAbs(float x, float y, float x1, float y1, float x2, float y2)
{
    return SVGPathSegCurvetoCubicAbs::create(x, y, x1, y1, x2, y2);
}

PassRefPtr<SVGPathSegCurvetoCubicRel> SVGPathElement::createSVGPathSegCurvetoCubicRel(float x, float y, float x1, float y1, float x2, float y2)
{
    return SVGPathSegCurvetoCubicRel::create(x, y, x1, y1, x2, y2);
}

PassRefPtr<SVGPathSegCurvetoQuadraticAbs> SVGPathElement::createSVGPathSegCurvetoQuadraticAbs(float x, float y, float x1, float y1)
{
    return SVGPathSegCurvetoQuadraticAbs::create(x, y, x1, y1);
}

PassRefPtr<SVGPathSegCurvetoQuadraticRel> SVGPathElement::createSVGPathSegCurvetoQuadraticRel(float x, float y, float x1, float y1)
{
    return SVGPathSegCurvetoQuadraticRel::create(x, y, x1, y1);
}

PassRefPtr<SVGPathSegArcAbs> SVGPathElement::createSVGPathSegArcAbs(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
{
    return SVGPathSegArcAbs::create(x, y, r1, r2, angle, largeArcFlag, sweepFlag);
}

PassRefPtr<SVGPathSegArcRel> SVGPathElement::createSVGPathSegArcRel(float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
{
    return SVGPathSegArcRel::create(x, y, r1, r2, angle, largeArcFlag, sweepFlag);
}

PassRefPtr<SVGPathSegLinetoHorizontalAbs> SVGPathElement::createSVGPathSegLinetoHorizontalAbs(float x)
{
    return SVGPathSegLinetoHorizontalAbs::create(x);
}

PassRefPtr<SVGPathSegLinetoHorizontalRel> SVGPathElement::createSVGPathSegLinetoHorizontalRel(float x)
{
    return SVGPathSegLinetoHorizontalRel::create(x);
}

PassRefPtr<SVGPathSegLinetoVerticalAbs> SVGPathElement::createSVGPathSegLinetoVerticalAbs(float y)
{
    return SVGPathSegLinetoVerticalAbs::create(y);
}

PassRefPtr<SVGPathSegLinetoVerticalRel> SVGPathElement::createSVGPathSegLinetoVerticalRel(float y)
{
    return SVGPathSegLinetoVerticalRel::create(y);
}

PassRefPtr<SVGPathSegCurvetoCubicSmoothAbs> SVGPathElement::createSVGPathSegCurvetoCubicSmoothAbs(float x, float y, float x2, float y2)
{
    return SVGPathSegCurvetoCubicSmoothAbs::create(x, y, x2, y2);
}

PassRefPtr<SVGPathSegCurvetoCubicSmoothRel> SVGPathElement::createSVGPathSegCurvetoCubicSmoothRel(float x, float y, float x2, float y2)
{
    return SVGPathSegCurvetoCubicSmoothRel::create(x, y, x2, y2);
}

PassRefPtr<SVGPathSegCurvetoQuadraticSmoothAbs> SVGPathElement::createSVGPathSegCurvetoQuadraticSmoothAbs(float x, float y)
{
    return SVGPathSegCurvetoQuadraticSmoothAbs::create(x, y);
}

PassRefPtr<SVGPathSegCurvetoQuadraticSmoothRel> SVGPathElement::createSVGPathSegCurvetoQuadraticSmoothRel(float x, float y)
{
    return SVGPathSegCurvetoQuadraticSmoothRel::create(x, y);
}

void SVGPathElement::parseMappedAttribute(Attribute* attr)
{
    if (attr->name() == SVGNames::dAttr) {
        ExceptionCode ec;
        pathSegList()->clear(ec);
        SVGPathParserFactory* factory = SVGPathParserFactory::self();
        if (!factory->buildSVGPathSegListFromString(attr->value(), pathSegList(), NormalizedParsing))
            document()->accessSVGExtensions()->reportError("Problem parsing d=\"" + attr->value() + "\"");
    } else if (attr->name() == SVGNames::pathLengthAttr) {
        setPathLengthBaseValue(attr->value().toFloat());
        if (pathLengthBaseValue() < 0.0f)
            document()->accessSVGExtensions()->reportError("A negative value for path attribute <pathLength> is not allowed");
    } else {
        if (SVGTests::parseMappedAttribute(attr))
            return;
        if (SVGLangSpace::parseMappedAttribute(attr))
            return;
        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
            return;
        SVGStyledTransformableElement::parseMappedAttribute(attr);
    }
}

void SVGPathElement::svgAttributeChanged(const QualifiedName& attrName)
{
    SVGStyledTransformableElement::svgAttributeChanged(attrName);

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

    if (attrName == SVGNames::dAttr) {
        renderer->setNeedsPathUpdate();
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    if (SVGStyledTransformableElement::isKnownAttribute(attrName)) {
        renderer->setNeedsTransformUpdate();
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    if (attrName == SVGNames::pathLengthAttr
        || SVGTests::isKnownAttribute(attrName)
        || SVGLangSpace::isKnownAttribute(attrName)
        || SVGExternalResourcesRequired::isKnownAttribute(attrName))
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
}

void SVGPathElement::synchronizeProperty(const QualifiedName& attrName)
{
    SVGStyledTransformableElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {
        synchronizePathLength();
        synchronizeExternalResourcesRequired();
        return;
    }

    if (attrName == SVGNames::pathLengthAttr)
        synchronizePathLength();
    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
        synchronizeExternalResourcesRequired();
}

SVGPathSegList* SVGPathElement::pathSegList() const
{
    if (!m_pathSegList)
        m_pathSegList = SVGPathSegList::create(SVGNames::dAttr);

    return m_pathSegList.get();
}

SVGPathSegList* SVGPathElement::normalizedPathSegList() const
{
    // TODO
    return 0;
}

SVGPathSegList* SVGPathElement::animatedPathSegList() const
{
    // TODO
    return 0;
}

SVGPathSegList* SVGPathElement::animatedNormalizedPathSegList() const
{
    // TODO
    return 0;
}

Path SVGPathElement::toPathData() const
{
    Path result;
    SVGPathParserFactory* factory = SVGPathParserFactory::self();
    factory->buildPathFromSVGPathSegList(pathSegList(), result);
    return result;
}

}

#endif // ENABLE(SVG)