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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2012. 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"
#include "core/svg/SVGAnimatedTransformList.h"
#include "SVGNames.h"
#include "core/svg/SVGAnimateTransformElement.h"
#include "core/svg/SVGAnimatedNumber.h"
#include "core/svg/SVGTransformDistance.h"
namespace WebCore {
SVGAnimatedTransformListAnimator::SVGAnimatedTransformListAnimator(SVGAnimationElement* animationElement, SVGElement* contextElement)
: SVGAnimatedTypeAnimator(AnimatedTransformList, animationElement, contextElement)
, m_transformTypeString(SVGTransform::transformTypePrefixForParsing(static_cast<SVGAnimateTransformElement*>(animationElement)->transformType()))
{
// Only <animateTransform> uses this animator, as <animate> doesn't allow to animate transform lists directly.
ASSERT(animationElement->hasTagName(SVGNames::animateTransformTag));
}
PassOwnPtr<SVGAnimatedType> SVGAnimatedTransformListAnimator::constructFromString(const String& string)
{
OwnPtr<SVGAnimatedType> animatedType = SVGAnimatedType::createTransformList(new SVGTransformList);
animatedType->transformList().parse(m_transformTypeString + string + ')');
ASSERT(animatedType->transformList().size() <= 1);
return animatedType.release();
}
PassOwnPtr<SVGAnimatedType> SVGAnimatedTransformListAnimator::startAnimValAnimation(const SVGElementAnimatedPropertyList& animatedTypes)
{
return SVGAnimatedType::createTransformList(constructFromBaseValue<SVGAnimatedTransformList>(animatedTypes));
}
void SVGAnimatedTransformListAnimator::stopAnimValAnimation(const SVGElementAnimatedPropertyList& animatedTypes)
{
stopAnimValAnimationForType<SVGAnimatedTransformList>(animatedTypes);
}
void SVGAnimatedTransformListAnimator::resetAnimValToBaseVal(const SVGElementAnimatedPropertyList& animatedTypes, SVGAnimatedType* type)
{
resetFromBaseValue<SVGAnimatedTransformList>(animatedTypes, type, &SVGAnimatedType::transformList);
}
void SVGAnimatedTransformListAnimator::animValWillChange(const SVGElementAnimatedPropertyList& animatedTypes)
{
animValWillChangeForType<SVGAnimatedTransformList>(animatedTypes);
}
void SVGAnimatedTransformListAnimator::animValDidChange(const SVGElementAnimatedPropertyList& animatedTypes)
{
animValDidChangeForType<SVGAnimatedTransformList>(animatedTypes);
}
void SVGAnimatedTransformListAnimator::addAnimatedTypes(SVGAnimatedType* from, SVGAnimatedType* to)
{
ASSERT(from->type() == AnimatedTransformList);
ASSERT(from->type() == to->type());
const SVGTransformList& fromTransformList = from->transformList();
SVGTransformList& toTransformList = to->transformList();
unsigned fromTransformListSize = fromTransformList.size();
if (!fromTransformListSize || fromTransformListSize != toTransformList.size())
return;
ASSERT(fromTransformListSize == 1);
const SVGTransform& fromTransform = fromTransformList[0];
SVGTransform& toTransform = toTransformList[0];
ASSERT(fromTransform.type() == toTransform.type());
toTransform = SVGTransformDistance::addSVGTransforms(fromTransform, toTransform);
}
void SVGAnimatedTransformListAnimator::calculateAnimatedValue(float percentage, unsigned repeatCount, SVGAnimatedType* from, SVGAnimatedType* to, SVGAnimatedType* toAtEndOfDuration, SVGAnimatedType* animated)
{
ASSERT(m_animationElement);
// Spec: To animations provide specific functionality to get a smooth change from the underlying value to the
// ‘to’ attribute value, which conflicts mathematically with the requirement for additive transform animations
// to be post-multiplied. As a consequence, in SVG 1.1 the behavior of to animations for ‘animateTransform’ is undefined.
// FIXME: This is not taken into account yet.
const SVGTransformList& fromTransformList = m_animationElement->animationMode() == ToAnimation ? animated->transformList() : from->transformList();
const SVGTransformList& toTransformList = to->transformList();
const SVGTransformList& toAtEndOfDurationTransformList = toAtEndOfDuration->transformList();
SVGTransformList& animatedTransformList = animated->transformList();
// Pass false to 'resizeAnimatedListIfNeeded' here, as the special post-multiplication behavior of <animateTransform> needs to be respected below.
if (!m_animationElement->adjustFromToListValues<SVGTransformList>(fromTransformList, toTransformList, animatedTransformList, percentage, false))
return;
// Never resize the animatedTransformList to the toTransformList size, instead either clear the list or append to it.
if (!animatedTransformList.isEmpty() && !m_animationElement->isAdditive())
animatedTransformList.clear();
unsigned fromTransformListSize = fromTransformList.size();
const SVGTransform& toTransform = toTransformList[0];
const SVGTransform effectiveFrom = fromTransformListSize ? fromTransformList[0] : SVGTransform(toTransform.type(), SVGTransform::ConstructZeroTransform);
SVGTransform currentTransform = SVGTransformDistance(effectiveFrom, toTransform).scaledDistance(percentage).addToSVGTransform(effectiveFrom);
if (m_animationElement->isAccumulated() && repeatCount) {
const SVGTransform effectiveToAtEnd = toAtEndOfDurationTransformList.size() ? toAtEndOfDurationTransformList[0] : SVGTransform(toTransform.type(), SVGTransform::ConstructZeroTransform);
animatedTransformList.append(SVGTransformDistance::addSVGTransforms(currentTransform, effectiveToAtEnd, repeatCount));
} else
animatedTransformList.append(currentTransform);
}
float SVGAnimatedTransformListAnimator::calculateDistance(const String& fromString, const String& toString)
{
ASSERT(m_animationElement);
// FIXME: This is not correct in all cases. The spec demands that each component (translate x and y for example)
// is paced separately. To implement this we need to treat each component as individual animation everywhere.
OwnPtr<SVGAnimatedType> from = constructFromString(fromString);
OwnPtr<SVGAnimatedType> to = constructFromString(toString);
SVGTransformList& fromTransformList = from->transformList();
SVGTransformList& toTransformList = to->transformList();
unsigned itemsCount = fromTransformList.size();
if (!itemsCount || itemsCount != toTransformList.size())
return -1;
ASSERT(itemsCount == 1);
if (fromTransformList[0].type() != toTransformList[0].type())
return -1;
// Spec: http://www.w3.org/TR/SVG/animate.html#complexDistances
// Paced animations assume a notion of distance between the various animation values defined by the ‘to’, ‘from’, ‘by’ and ‘values’ attributes.
// Distance is defined only for scalar types (such as <length>), colors and the subset of transformation types that are supported by ‘animateTransform’.
return SVGTransformDistance(fromTransformList[0], toTransformList[0]).distance();
}
}
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