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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Apple Inc. All rights reserved.
* Copyright (C) 2008 Cameron McCormack <cam@mcc.id.au>
* 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.
*/
#ifndef SVGAnimationElement_h
#define SVGAnimationElement_h
#include "core/CoreExport.h"
#include "core/svg/animation/SVGSMILElement.h"
#include "ui/gfx/geometry/cubic_bezier.h"
#include "wtf/Vector.h"
namespace blink {
class ExceptionState;
enum AnimationMode {
NoAnimation,
FromToAnimation,
FromByAnimation,
ToAnimation,
ByAnimation,
ValuesAnimation,
PathAnimation // Used by AnimateMotion.
};
enum CalcMode {
CalcModeDiscrete,
CalcModeLinear,
CalcModePaced,
CalcModeSpline
};
class CORE_EXPORT SVGAnimationElement : public SVGSMILElement {
DEFINE_WRAPPERTYPEINFO();
public:
// SVGAnimationElement
float getStartTime(ExceptionState&) const;
float getCurrentTime() const;
float getSimpleDuration(ExceptionState&) const;
void beginElement();
void beginElementAt(float offset);
void endElement();
void endElementAt(float offset);
DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(begin, beginEvent);
DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(end, endEvent);
DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(repeat, repeatEvent);
virtual bool isAdditive();
bool isAccumulated() const;
AnimationMode getAnimationMode() const { return m_animationMode; }
CalcMode getCalcMode() const { return m_calcMode; }
template <typename AnimatedType>
void animateDiscreteType(float percentage,
const AnimatedType& fromType,
const AnimatedType& toType,
AnimatedType& animatedType) {
if ((getAnimationMode() == FromToAnimation && percentage > 0.5) ||
getAnimationMode() == ToAnimation || percentage == 1) {
animatedType = AnimatedType(toType);
return;
}
animatedType = AnimatedType(fromType);
}
void animateAdditiveNumber(float percentage,
unsigned repeatCount,
float fromNumber,
float toNumber,
float toAtEndOfDurationNumber,
float& animatedNumber) {
float number;
if (getCalcMode() == CalcModeDiscrete)
number = percentage < 0.5 ? fromNumber : toNumber;
else
number = (toNumber - fromNumber) * percentage + fromNumber;
if (isAccumulated() && repeatCount)
number += toAtEndOfDurationNumber * repeatCount;
if (isAdditive() && getAnimationMode() != ToAnimation)
animatedNumber += number;
else
animatedNumber = number;
}
protected:
SVGAnimationElement(const QualifiedName&, Document&);
void parseAttribute(const AttributeModificationParams&) override;
void svgAttributeChanged(const QualifiedName&) override;
String toValue() const;
String byValue() const;
String fromValue() const;
// from SVGSMILElement
void startedActiveInterval() override;
void updateAnimation(float percent,
unsigned repeat,
SVGSMILElement* resultElement) override;
virtual void updateAnimationMode();
void setAnimationMode(AnimationMode animationMode) {
m_animationMode = animationMode;
}
void setCalcMode(CalcMode calcMode) { m_calcMode = calcMode; }
// Parses a list of values as specified by SVG, stripping leading
// and trailing whitespace, and places them in result. If the
// format of the string is not valid, parseValues empties result
// and returns false. See
// http://www.w3.org/TR/SVG/animate.html#ValuesAttribute .
static bool parseValues(const String&, Vector<String>& result);
void animationAttributeChanged() override;
private:
bool isValid() const final { return SVGTests::isValid(); }
virtual bool calculateToAtEndOfDurationValue(
const String& toAtEndOfDurationString) = 0;
virtual bool calculateFromAndToValues(const String& fromString,
const String& toString) = 0;
virtual bool calculateFromAndByValues(const String& fromString,
const String& byString) = 0;
virtual void calculateAnimatedValue(float percent,
unsigned repeatCount,
SVGSMILElement* resultElement) = 0;
virtual float calculateDistance(const String& /*fromString*/,
const String& /*toString*/) {
return -1.f;
}
void currentValuesForValuesAnimation(float percent,
float& effectivePercent,
String& from,
String& to);
void calculateKeyTimesForCalcModePaced();
float calculatePercentFromKeyPoints(float percent) const;
void currentValuesFromKeyPoints(float percent,
float& effectivePercent,
String& from,
String& to) const;
float calculatePercentForSpline(float percent, unsigned splineIndex) const;
float calculatePercentForFromTo(float percent) const;
unsigned calculateKeyTimesIndex(float percent) const;
void setCalcMode(const AtomicString&);
bool m_animationValid;
Vector<String> m_values;
// FIXME: We should probably use doubles for this, but there's no point
// making such a change unless all SVG logic for sampling animations is
// changed to use doubles.
Vector<float> m_keyTimes;
Vector<float> m_keyPoints;
Vector<gfx::CubicBezier> m_keySplines;
String m_lastValuesAnimationFrom;
String m_lastValuesAnimationTo;
CalcMode m_calcMode;
AnimationMode m_animationMode;
};
} // namespace blink
#endif // SVGAnimationElement_h
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