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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 "SVGAnimatedAngle.h"
#include "SVGAnimateElement.h"
namespace WebCore {
SVGAnimatedAngleAnimator::SVGAnimatedAngleAnimator(SVGAnimationElement* animationElement, SVGElement* contextElement)
: SVGAnimatedTypeAnimator(AnimatedAngle, animationElement, contextElement)
{
}
static inline SVGAngle& sharedSVGAngle(const String& valueAsString)
{
DEFINE_STATIC_LOCAL(SVGAngle, sharedAngle, ());
ExceptionCode ec = 0;
sharedAngle.setValueAsString(valueAsString, ec);
ASSERT(!ec);
return sharedAngle;
}
PassOwnPtr<SVGAnimatedType> SVGAnimatedAngleAnimator::constructFromString(const String& string)
{
OwnPtr<SVGAnimatedType> animatedType = SVGAnimatedType::createAngle(new SVGAngle);
ExceptionCode ec = 0;
animatedType->angle().setValueAsString(string, ec);
ASSERT(!ec);
return animatedType.release();
}
void SVGAnimatedAngleAnimator::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 SVGAnimatedAngleAnimator::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);
SVGAngle& fromAngle = from->angle();
SVGAngle& toAngle = to->angle();
toAngle.setValue(toAngle.value() + fromAngle.value());
}
void SVGAnimatedAngleAnimator::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.
// FIXME: Avoid string parsing.
if (animationMode == ToAnimation)
from = constructFromString(animated->angle().valueAsString());
// Replace 'inherit' by their computed property values.
float number;
float fromAngle = from->angle().value();
float toAngle = to->angle().value();
if (animationElement->fromPropertyValueType() == InheritValue) {
String fromAngleString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), fromAngleString);
fromAngle = sharedSVGAngle(fromAngleString).value();
}
if (animationElement->toPropertyValueType() == InheritValue) {
String toAngleString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), toAngleString);
toAngle = sharedSVGAngle(toAngleString).value();
}
if (animationElement->calcMode() == CalcModeDiscrete)
number = percentage < 0.5f ? fromAngle : toAngle;
else
number = (toAngle - fromAngle) * percentage + fromAngle;
// FIXME: This is not correct for values animation.
if (animationElement->isAccumulated() && repeatCount)
number += toAngle * repeatCount;
SVGAngle& animatedSVGAngle = animated->angle();
if (animationElement->isAdditive() && animationMode != ToAnimation) {
float animatedSVGAngleValue = animatedSVGAngle.value();
animatedSVGAngleValue += number;
animatedSVGAngle.setValue(animatedSVGAngleValue);
} else
animatedSVGAngle.setValue(number);
}
float SVGAnimatedAngleAnimator::calculateDistance(const String& fromString, const String& toString)
{
ExceptionCode ec = 0;
SVGAngle from = SVGAngle();
from.setValueAsString(fromString, ec);
ASSERT(!ec);
SVGAngle to = SVGAngle();
to.setValueAsString(toString, ec);
ASSERT(!ec);
return fabsf(to.value() - from.value());
}
}
#endif // ENABLE(SVG)
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