WebCore/ksvg2/svg/SVGFitToViewBox.cpp

/*
    Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
                  2004, 2005 Rob Buis <buis@kde.org>

    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., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.
*/

#include "config.h"
#if SVG_SUPPORT
#include "DeprecatedStringList.h"

#include "Attr.h"
#include "StringImpl.h"

#include "SVGNames.h"
#include "SVGRect.h"
#include "SVGSVGElement.h"
#include "SVGAnimatedRect.h"
#include "SVGFitToViewBox.h"
#include "SVGPreserveAspectRatio.h"
#include "SVGAnimatedPreserveAspectRatio.h"

using namespace WebCore;

SVGFitToViewBox::SVGFitToViewBox()
{
}

SVGFitToViewBox::~SVGFitToViewBox()
{
}

SVGAnimatedRect *SVGFitToViewBox::viewBox() const
{
    if(!m_viewBox)
    {
        //const SVGStyledElement *context = dynamic_cast<const SVGStyledElement *>(this);
        m_viewBox = new SVGAnimatedRect(0); // FIXME: 0 is a hack
    }

    return m_viewBox.get();
}

SVGAnimatedPreserveAspectRatio *SVGFitToViewBox::preserveAspectRatio() const
{
    if(!m_preserveAspectRatio)
    {
        //const SVGStyledElement *context = dynamic_cast<const SVGStyledElement *>(this);
        m_preserveAspectRatio = new SVGAnimatedPreserveAspectRatio(0); // FIXME: 0 is a hack
    }

    return m_preserveAspectRatio.get();
}

void SVGFitToViewBox::parseViewBox(StringImpl *str)
{
    // allow for viewbox def with ',' or whitespace
    DeprecatedString viewbox = String(str).deprecatedString();
    DeprecatedStringList points = DeprecatedStringList::split(' ', viewbox.replace(',', ' ').simplifyWhiteSpace());

    if (points.count() == 4) {
        viewBox()->baseVal()->setX(points[0].toDouble());
        viewBox()->baseVal()->setY(points[1].toDouble());
        viewBox()->baseVal()->setWidth(points[2].toDouble());
        viewBox()->baseVal()->setHeight(points[3].toDouble());
    } else
        fprintf(stderr, "WARNING: Malformed viewbox string: %s (l: %i)", viewbox.ascii(), viewbox.length());
}

SVGMatrix *SVGFitToViewBox::viewBoxToViewTransform(float viewWidth, float viewHeight) const
{
    SVGRect *viewBoxRect = viewBox()->baseVal();
    if(viewBoxRect->width() == 0 || viewBoxRect->height() == 0)
        return SVGSVGElement::createSVGMatrix();

    return preserveAspectRatio()->baseVal()->getCTM(viewBoxRect->x(),
            viewBoxRect->y(), viewBoxRect->width(), viewBoxRect->height(),
            0, 0, viewWidth, viewHeight);
}

bool SVGFitToViewBox::parseMappedAttribute(MappedAttribute *attr)
{
    if (attr->name() == SVGNames::viewBoxAttr)
    {
        parseViewBox(attr->value().impl());
        return true;
    }
    else if (attr->name() == SVGNames::preserveAspectRatioAttr)
    {
        preserveAspectRatio()->baseVal()->parsePreserveAspectRatio(attr->value().impl());
        return true;
    }

    return false;
}

// vim:ts=4:noet
#endif // SVG_SUPPORT