svgpathelement.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
    Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <[e-mail]>
                  2004, 2005, 2006, 2007 Rob Buis <[e-mail]>

    This file is part of the KDE project

    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 "RenderPath.h"
#include "SVGNames.h"
#include "SVGParserUtilities.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 "SVGPathSegMoveto.h"
#include "SVGSVGElement.h"

namespace WebCore {

SVGPathElement::SVGPathElement(const QualifiedName& tagName, Document* doc)
    : SVGStyledTransformableElement(tagName, doc)
    , SVGTests()
    , SVGLangSpace()
    , SVGExternalResourcesRequired()
    , m_pathLength(this, SVGNames::pathLengthAttr, 0.0f)
{
}

SVGPathElement::~SVGPathElement()
{
}

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)
{
    return pathSegList()->getPathSegAtLength(length);
}

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(MappedAttribute* attr)
{
    if (attr->name() == SVGNames::dAttr) {
        ExceptionCode ec;
        pathSegList()->clear(ec);
        if (!pathSegListFromSVGData(pathSegList(), attr->value(), true))
            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);

    if (!renderer())
        return;

    if (attrName == SVGNames::dAttr || attrName == SVGNames::pathLengthAttr ||
        SVGTests::isKnownAttribute(attrName) ||
        SVGLangSpace::isKnownAttribute(attrName) ||
        SVGExternalResourcesRequired::isKnownAttribute(attrName) ||
        SVGStyledTransformableElement::isKnownAttribute(attrName))
        renderer()->setNeedsLayout(true);
}

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
{
    return pathSegList()->toPathData();
}

}

#endif // ENABLE(SVG)