WebCore/svg/SVGPointList.cpp

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

namespace WebCore {

SVGPointList::SVGPointList(const QualifiedName& attributeName)
    : SVGPODList<FloatPoint>(attributeName)
{
}

SVGPointList::~SVGPointList()
{
}

String SVGPointList::valueAsString() const
{
    String result;

    ExceptionCode ec = 0;
    for (unsigned int i = 0; i < numberOfItems(); ++i) {
        if (i > 0)
            result += " ";

        FloatPoint point = getItem(i, ec);
        ASSERT(ec == 0);

        result += String::format("%.6lg %.6lg", point.x(), point.y());
    }

    return result;
}

float inline adjustAnimatedValue(float from, float to, float progress)
{
    return (to - from) * progress + from;
}

PassRefPtr<SVGPointList> SVGPointList::createAnimated(const SVGPointList* fromList, const SVGPointList* toList, float progress)
{
    unsigned itemCount = fromList->numberOfItems();
    if (!itemCount || itemCount != toList->numberOfItems())
        return 0;
    RefPtr<SVGPointList> result = create(fromList->associatedAttributeName());
    ExceptionCode ec = 0;
    for (unsigned n = 0; n < itemCount; ++n) {
        FloatPoint from = fromList->getItem(n, ec);
        if (ec)
            return 0;
        FloatPoint to = toList->getItem(n, ec);
        if (ec)
            return 0;
        FloatPoint segment = FloatPoint(adjustAnimatedValue(from.x(), to.x(), progress),
                                        adjustAnimatedValue(from.y(), to.y(), progress));
        result->appendItem(segment, ec);
        if (ec)
            return 0;
    }
    return result.release();
}

}

#endif // ENABLE(SVG)