third_party/WebKit/Source/core/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 "core/svg/SVGPointList.h"

#include "core/svg/SVGAnimationElement.h"
#include "core/svg/SVGParserUtilities.h"
#include "platform/geometry/FloatPoint.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/WTFString.h"

namespace blink {

SVGPointList::SVGPointList()
{
}

SVGPointList::~SVGPointList()
{
}

String SVGPointList::valueAsString() const
{
    StringBuilder builder;

    ConstIterator it = begin();
    ConstIterator itEnd = end();
    if (it != itEnd) {
        builder.append(it->valueAsString());
        ++it;

        for (; it != itEnd; ++it) {
            builder.append(' ');
            builder.append(it->valueAsString());
        }
    }

    return builder.toString();
}

template <typename CharType>
SVGParsingError SVGPointList::parse(const CharType*& ptr, const CharType* end)
{
    if (!skipOptionalSVGSpaces(ptr, end))
        return SVGParseStatus::NoError;

    const CharType* listStart = ptr;
    for (;;) {
        float x = 0;
        float y = 0;
        if (!parseNumber(ptr, end, x)
            || !parseNumber(ptr, end, y, DisallowWhitespace))
            return SVGParsingError(SVGParseStatus::ExpectedNumber, ptr - listStart);

        append(SVGPoint::create(FloatPoint(x, y)));

        if (!skipOptionalSVGSpaces(ptr, end))
            break;

        if (*ptr == ',') {
            ++ptr;
            skipOptionalSVGSpaces(ptr, end);

            // ',' requires the list to be continued
            continue;
        }
    }
    return SVGParseStatus::NoError;
}

SVGParsingError SVGPointList::setValueAsString(const String& value)
{
    clear();

    if (value.isEmpty())
        return SVGParseStatus::NoError;

    if (value.is8Bit()) {
        const LChar* ptr = value.characters8();
        const LChar* end = ptr + value.length();
        return parse(ptr, end);
    }
    const UChar* ptr = value.characters16();
    const UChar* end = ptr + value.length();
    return parse(ptr, end);
}

void SVGPointList::add(SVGPropertyBase* other, SVGElement* contextElement)
{
    SVGPointList* otherList = toSVGPointList(other);

    if (length() != otherList->length())
        return;

    for (size_t i = 0; i < length(); ++i)
        at(i)->setValue(at(i)->value() + otherList->at(i)->value());
}

void SVGPointList::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, SVGPropertyBase* fromValue, SVGPropertyBase* toValue, SVGPropertyBase* toAtEndOfDurationValue, SVGElement* contextElement)
{
    SVGPointList* fromList = toSVGPointList(fromValue);
    SVGPointList* toList = toSVGPointList(toValue);
    SVGPointList* toAtEndOfDurationList = toSVGPointList(toAtEndOfDurationValue);

    size_t fromPointListSize = fromList->length();
    size_t toPointListSize = toList->length();
    size_t toAtEndOfDurationListSize = toAtEndOfDurationList->length();

    if (!adjustFromToListValues(fromList, toList, percentage, animationElement->getAnimationMode()))
        return;

    for (size_t i = 0; i < toPointListSize; ++i) {
        float animatedX = at(i)->x();
        float animatedY = at(i)->y();

        FloatPoint effectiveFrom;
        if (fromPointListSize)
            effectiveFrom = fromList->at(i)->value();
        FloatPoint effectiveTo = toList->at(i)->value();
        FloatPoint effectiveToAtEnd;
        if (i < toAtEndOfDurationListSize)
            effectiveToAtEnd = toAtEndOfDurationList->at(i)->value();

        animationElement->animateAdditiveNumber(percentage, repeatCount, effectiveFrom.x(), effectiveTo.x(), effectiveToAtEnd.x(), animatedX);
        animationElement->animateAdditiveNumber(percentage, repeatCount, effectiveFrom.y(), effectiveTo.y(), effectiveToAtEnd.y(), animatedY);
        at(i)->setValue(FloatPoint(animatedX, animatedY));
    }
}

float SVGPointList::calculateDistance(SVGPropertyBase* to, SVGElement*)
{
    // FIXME: Distance calculation is not possible for SVGPointList right now. We need the distance for every single value.
    return -1;
}

} // namespace blink