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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_EFFECT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_EFFECT_H_
#include "base/optional.h"
#include "third_party/blink/renderer/core/animation/animation_time_delta.h"
#include "third_party/blink/renderer/core/animation/timing.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class Animation;
class AnimationEffectOwner;
class EffectTiming;
class ComputedEffectTiming;
class OptionalEffectTiming;
class WorkletAnimation;
enum TimingUpdateReason {
kTimingUpdateOnDemand,
kTimingUpdateForAnimationFrame
};
static inline bool IsNull(double value) {
return std::isnan(value);
}
static inline double NullValue() {
return std::numeric_limits<double>::quiet_NaN();
}
// Represents the content of an Animation and its fractional timing state.
// https://drafts.csswg.org/web-animations/#the-animationeffect-interface
class CORE_EXPORT AnimationEffect : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
// Calls Attach/Detach, GetAnimation, UpdateInheritedTime.
friend class Animation;
friend class WorkletAnimation;
// Calls GetAnimation().
// TODO(majidvp): Remove this. EffectStack should not need to access animation
// directly.
friend class EffectStack;
public:
// Note that logic in CSSAnimations depends on the order of these values.
enum Phase {
kPhaseBefore,
kPhaseActive,
kPhaseAfter,
kPhaseNone,
};
// Represents the animation direction from the Web Animations spec, see
// https://drafts.csswg.org/web-animations-1/#animation-direction.
enum AnimationDirection {
kForwards,
kBackwards,
};
class EventDelegate : public GarbageCollectedFinalized<EventDelegate> {
public:
virtual ~EventDelegate() = default;
virtual bool RequiresIterationEvents(const AnimationEffect&) = 0;
virtual void OnEventCondition(const AnimationEffect&) = 0;
virtual void Trace(blink::Visitor* visitor) {}
};
~AnimationEffect() override = default;
virtual bool IsKeyframeEffect() const { return false; }
virtual bool IsInertEffect() const { return false; }
Phase GetPhase() const { return EnsureCalculated().phase; }
bool IsCurrent() const { return EnsureCalculated().is_current; }
bool IsInEffect() const { return EnsureCalculated().is_in_effect; }
bool IsInPlay() const { return EnsureCalculated().is_in_play; }
double CurrentIteration() const {
return EnsureCalculated().current_iteration;
}
base::Optional<double> Progress() const {
return EnsureCalculated().progress;
}
double TimeToForwardsEffectChange() const {
return EnsureCalculated().time_to_forwards_effect_change;
}
double TimeToReverseEffectChange() const {
return EnsureCalculated().time_to_reverse_effect_change;
}
AnimationTimeDelta IterationDuration() const;
double RepeatedDuration() const;
double EndTimeInternal() const;
const Timing& SpecifiedTiming() const { return timing_; }
void UpdateSpecifiedTiming(const Timing&);
EventDelegate* GetEventDelegate() { return event_delegate_; }
EffectTiming* getTiming() const;
ComputedEffectTiming* getComputedTiming() const;
void updateTiming(OptionalEffectTiming*,
ExceptionState& = ASSERT_NO_EXCEPTION);
// Attach/Detach the AnimationEffect from its owning animation.
virtual void Attach(AnimationEffectOwner* owner) { owner_ = owner; }
virtual void Detach() {
DCHECK(owner_);
owner_ = nullptr;
}
const Animation* GetAnimationForTesting() const { return GetAnimation(); }
void Trace(blink::Visitor*) override;
protected:
explicit AnimationEffect(const Timing&, EventDelegate* = nullptr);
// When AnimationEffect receives a new inherited time via updateInheritedTime
// it will (if necessary) recalculate timings and (if necessary) call
// updateChildrenAndEffects.
void UpdateInheritedTime(double inherited_time, TimingUpdateReason) const;
void Invalidate() const { needs_update_ = true; }
void InvalidateAndNotifyOwner() const;
bool RequiresIterationEvents() const {
return event_delegate_ && event_delegate_->RequiresIterationEvents(*this);
}
void ClearEventDelegate() { event_delegate_ = nullptr; }
virtual void UpdateChildrenAndEffects() const = 0;
virtual AnimationTimeDelta IntrinsicIterationDuration() const {
return AnimationTimeDelta();
}
virtual double CalculateTimeToEffectChange(
bool forwards,
double local_time,
double time_to_next_iteration) const = 0;
const Animation* GetAnimation() const;
Animation* GetAnimation();
Member<AnimationEffectOwner> owner_;
Timing timing_;
Member<EventDelegate> event_delegate_;
mutable struct CalculatedTiming {
DISALLOW_NEW();
Phase phase;
double current_iteration;
base::Optional<double> progress;
bool is_current;
bool is_in_effect;
bool is_in_play;
double local_time = NullValue();
double time_to_forwards_effect_change;
double time_to_reverse_effect_change;
} calculated_;
mutable bool needs_update_;
mutable double last_update_time_;
String name_;
const CalculatedTiming& EnsureCalculated() const;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_ANIMATION_EFFECT_H_
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