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