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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ComputedTimingFunction_h
#define mozilla_ComputedTimingFunction_h
#include "nsSMILKeySpline.h" // nsSMILKeySpline
#include "nsStyleStruct.h" // nsTimingFunction
namespace mozilla {
class ComputedTimingFunction
{
public:
// BeforeFlag is used in step timing function.
// https://w3c.github.io/web-animations/#before-flag
enum class BeforeFlag {
Unset,
Set
};
void Init(const nsTimingFunction &aFunction);
double GetValue(double aPortion, BeforeFlag aBeforeFlag) const;
const nsSMILKeySpline* GetFunction() const
{
NS_ASSERTION(HasSpline(), "Type mismatch");
return &mTimingFunction;
}
nsTimingFunction::Type GetType() const { return mType; }
bool HasSpline() const { return nsTimingFunction::IsSplineType(mType); }
uint32_t GetSteps() const { return mSteps; }
bool operator==(const ComputedTimingFunction& aOther) const
{
return mType == aOther.mType &&
(HasSpline() ?
mTimingFunction == aOther.mTimingFunction :
mSteps == aOther.mSteps);
}
bool operator!=(const ComputedTimingFunction& aOther) const
{
return !(*this == aOther);
}
int32_t Compare(const ComputedTimingFunction& aRhs) const;
void AppendToString(nsAString& aResult) const;
static double GetPortion(const Maybe<ComputedTimingFunction>& aFunction,
double aPortion,
BeforeFlag aBeforeFlag)
{
return aFunction ? aFunction->GetValue(aPortion, aBeforeFlag) : aPortion;
}
static int32_t Compare(const Maybe<ComputedTimingFunction>& aLhs,
const Maybe<ComputedTimingFunction>& aRhs);
private:
nsTimingFunction::Type mType;
nsSMILKeySpline mTimingFunction;
uint32_t mSteps;
};
} // namespace mozilla
#endif // mozilla_ComputedTimingFunction_h
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