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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 "SVGAnimatedLength.h"
#include "SVGAnimateElement.h"
#include "SVGAnimatedNumber.h"
namespace WebCore {
SVGAnimatedLengthAnimator::SVGAnimatedLengthAnimator(SVGAnimationElement* animationElement, SVGElement* contextElement)
: SVGAnimatedTypeAnimator(AnimatedLength, animationElement, contextElement)
, m_lengthMode(SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName()))
{
}
static inline SVGLength& sharedSVGLength(SVGLengthMode mode, const String& valueAsString)
{
DEFINE_STATIC_LOCAL(SVGLength, sharedLength, ());
ExceptionCode ec = 0;
sharedLength.setValueAsString(valueAsString, mode, ec);
ASSERT(!ec);
return sharedLength;
}
PassOwnPtr<SVGAnimatedType> SVGAnimatedLengthAnimator::constructFromString(const String& string)
{
return SVGAnimatedType::createLength(new SVGLength(m_lengthMode, string));
}
void SVGAnimatedLengthAnimator::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 SVGAnimatedLengthAnimator::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);
SVGLengthContext lengthContext(m_contextElement);
SVGLength& fromLength = from->length();
SVGLength& toLength = to->length();
ExceptionCode ec = 0;
toLength.setValue(toLength.value(lengthContext) + fromLength.value(lengthContext), lengthContext, ec);
ASSERT(!ec);
}
void SVGAnimatedLengthAnimator::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.
SVGLength& animatedSVGLength = animated->length();
SVGLength& fromSVGLength = from->length();
if (animationMode == ToAnimation)
fromSVGLength = animatedSVGLength;
// Replace 'inherit' by their computed property values.
SVGLength& toSVGLength = to->length();
if (animationElement->fromPropertyValueType() == InheritValue) {
String fromLengthString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), fromLengthString);
fromSVGLength = sharedSVGLength(m_lengthMode, fromLengthString);
}
if (animationElement->toPropertyValueType() == InheritValue) {
String toLengthString;
animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), toLengthString);
toSVGLength = sharedSVGLength(m_lengthMode, toLengthString);
}
SVGLengthContext lengthContext(m_contextElement);
float result = animatedSVGLength.value(lengthContext);
SVGLengthType unitType = percentage < 0.5 ? fromSVGLength.unitType() : toSVGLength.unitType();
SVGAnimatedNumberAnimator::calculateAnimatedNumber(animationElement, percentage, repeatCount, result, fromSVGLength.value(lengthContext), toSVGLength.value(lengthContext));
ExceptionCode ec = 0;
animatedSVGLength.setValue(lengthContext, result, m_lengthMode, unitType, ec);
ASSERT(!ec);
}
float SVGAnimatedLengthAnimator::calculateDistance(const String& fromString, const String& toString)
{
ASSERT(m_animationElement);
ASSERT(m_contextElement);
SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
SVGLengthMode lengthMode = SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName());
SVGLength from = SVGLength(lengthMode, fromString);
SVGLength to = SVGLength(lengthMode, toString);
SVGLengthContext lengthContext(m_contextElement);
return fabsf(to.value(lengthContext) - from.value(lengthContext));
}
}
#endif // ENABLE(SVG)
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