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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 THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ANIMATION_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ANIMATION_ELEMENT_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/svg/animation/svg_smil_element.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "ui/gfx/geometry/cubic_bezier.h"
namespace blink {
class ExceptionState;
enum AnimationMode {
kNoAnimation,
kFromToAnimation,
kFromByAnimation,
kToAnimation,
kByAnimation,
kValuesAnimation,
kPathAnimation // Used by AnimateMotion.
};
enum CalcMode {
kCalcModeDiscrete,
kCalcModeLinear,
kCalcModePaced,
kCalcModeSpline
};
class CORE_EXPORT SVGAnimationElement : public SVGSMILElement {
DEFINE_WRAPPERTYPEINFO();
public:
// SVGAnimationElement
float getStartTime(ExceptionState&) const;
float getCurrentTime() const;
float getSimpleDuration(ExceptionState&) const;
void beginElement() { beginElementAt(0); }
void beginElementAt(float offset);
void endElement() { endElementAt(0); }
void endElementAt(float offset);
DEFINE_ATTRIBUTE_EVENT_LISTENER(begin, kBeginEvent)
DEFINE_ATTRIBUTE_EVENT_LISTENER(end, kEndEvent)
DEFINE_ATTRIBUTE_EVENT_LISTENER(repeat, kRepeatEvent)
virtual bool IsAdditive();
bool IsAccumulated() const;
AnimationMode GetAnimationMode() const { return animation_mode_; }
CalcMode GetCalcMode() const { return calc_mode_; }
bool OverwritesUnderlyingAnimationValue() override;
template <typename AnimatedType>
void AnimateDiscreteType(float percentage,
const AnimatedType& from_type,
const AnimatedType& to_type,
AnimatedType& animated_type) {
if ((GetAnimationMode() == kFromToAnimation && percentage > 0.5) ||
GetAnimationMode() == kToAnimation || percentage == 1) {
animated_type = AnimatedType(to_type);
return;
}
animated_type = AnimatedType(from_type);
}
void AnimateAdditiveNumber(float percentage,
unsigned repeat_count,
float from_number,
float to_number,
float to_at_end_of_duration_number,
float& animated_number) {
float number;
if (GetCalcMode() == kCalcModeDiscrete)
number = percentage < 0.5 ? from_number : to_number;
else
number = (to_number - from_number) * percentage + from_number;
if (IsAccumulated() && repeat_count)
number += to_at_end_of_duration_number * repeat_count;
if (IsAdditive() && GetAnimationMode() != kToAnimation)
animated_number += number;
else
animated_number = 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* result_element) override;
virtual void UpdateAnimationMode();
void SetAnimationMode(AnimationMode animation_mode) {
animation_mode_ = animation_mode;
}
void SetCalcMode(CalcMode calc_mode) { calc_mode_ = calc_mode; }
// 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 InvalidatedValuesCache();
void AnimationAttributeChanged() override;
private:
bool IsValid() const final { return SVGTests::IsValid(); }
virtual bool CalculateToAtEndOfDurationValue(
const String& to_at_end_of_duration_string) = 0;
virtual bool CalculateFromAndToValues(const String& from_string,
const String& to_string) = 0;
virtual bool CalculateFromAndByValues(const String& from_string,
const String& by_string) = 0;
virtual void CalculateAnimatedValue(float percent,
unsigned repeat_count,
SVGSMILElement* result_element) = 0;
virtual float CalculateDistance(const String& /*fromString*/,
const String& /*toString*/) {
return -1.f;
}
void CurrentValuesForValuesAnimation(float percent,
float& effective_percent,
String& from,
String& to);
void CalculateKeyTimesForCalcModePaced();
float CalculatePercentFromKeyPoints(float percent) const;
void CurrentValuesFromKeyPoints(float percent,
float& effective_percent,
String& from,
String& to) const;
float CalculatePercentForSpline(float percent, unsigned spline_index) const;
float CalculatePercentForFromTo(float percent) const;
unsigned CalculateKeyTimesIndex(float percent) const;
void SetCalcMode(const AtomicString&);
bool animation_valid_;
Vector<String> 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> key_times_;
Vector<float> key_points_;
Vector<gfx::CubicBezier> key_splines_;
String last_values_animation_from_;
String last_values_animation_to_;
CalcMode calc_mode_;
AnimationMode animation_mode_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SVG_SVG_ANIMATION_ELEMENT_H_
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