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/*
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* 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 "SVGAnimatedNumber.h"
#include "SVGAnimateElement.h"
#include "SVGParserUtilities.h"
using namespace std;
namespace WebCore {
SVGAnimatedNumberAnimator::SVGAnimatedNumberAnimator(SVGAnimationElement* animationElement, SVGElement* contextElement)
: SVGAnimatedTypeAnimator(AnimatedNumber, animationElement, contextElement)
{
}
PassOwnPtr<SVGAnimatedType> SVGAnimatedNumberAnimator::constructFromString(const String& string)
{
OwnPtr<SVGAnimatedType> animtedType = SVGAnimatedType::createNumber(new float);
float& animatedNumber = animtedType->number();
if (!parseNumberFromString(string, animatedNumber))
animatedNumber = 0;
return animtedType.release();
}
void SVGAnimatedNumberAnimator::calculateFromAndToValues(OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, const String& fromString, const String& toString)
{
ASSERT(m_contextElement);
ASSERT(m_animationElement);
SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
animationElement->determinePropertyValueTypes(fromString, toString);
from = constructFromString(fromString);
to = constructFromString(toString);
}
void SVGAnimatedNumberAnimator::calculateFromAndByValues(OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, const String& fromString, const String& byString)
{
ASSERT(m_contextElement);
ASSERT(m_animationElement);
SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
animationElement->determinePropertyValueTypes(fromString, byString);
from = constructFromString(fromString);
to = constructFromString(byString);
to->number() += from->number();
}
void SVGAnimatedNumberAnimator::calculateAnimatedNumber(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, float& animatedNumber, float fromNumber, float toNumber)
{
float number;
if (animationElement->calcMode() == CalcModeDiscrete)
number = percentage < 0.5 ? fromNumber : toNumber;
else
number = (toNumber - fromNumber) * percentage + fromNumber;
// FIXME: This is not correct for values animation. Right now we transform values-animation to multiple from-to-animations and
// accumulate every single value to the previous one. But accumulation should just take into account after a complete cycle
// of values-animaiton. See example at: http://www.w3.org/TR/2001/REC-smil-animation-20010904/#RepeatingAnim
if (animationElement->isAccumulated() && repeatCount)
number += toNumber * repeatCount;
if (animationElement->isAdditive() && animationElement->animationMode() != ToAnimation)
animatedNumber += number;
else
animatedNumber = number;
}
void SVGAnimatedNumberAnimator::calculateAnimatedValue(float percentage, unsigned repeatCount,
OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, OwnPtr<SVGAnimatedType>& animated)
{
ASSERT(m_animationElement);
ASSERT(m_contextElement);
SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
AnimationMode animationMode = animationElement->animationMode();
// To animation uses contributions from the lower priority animations as the base value.
float& animatedNumber = animated->number();
if (animationMode == ToAnimation)
from->number() = animatedNumber;
// Replace 'inherit' by their computed property values.
float& fromNumber = from->number();
float& toNumber = to->number();
if (animationElement->fromPropertyValueType() == InheritValue) {
String fromNumberString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), fromNumberString);
parseNumberFromString(fromNumberString, fromNumber);
}
if (animationElement->toPropertyValueType() == InheritValue) {
String toNumberString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), toNumberString);
parseNumberFromString(toNumberString, toNumber);
}
calculateAnimatedNumber(animationElement, percentage, repeatCount, animatedNumber, fromNumber, toNumber);
}
float SVGAnimatedNumberAnimator::calculateDistance(const String& fromString, const String& toString)
{
ASSERT(m_contextElement);
float from = 0;
float to = 0;
parseNumberFromString(fromString, from);
parseNumberFromString(toString, to);
return fabsf(to - from);
}
}
#endif // ENABLE(SVG)
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