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-rw-r--r--dom/animation/ComputedTimingFunction.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/dom/animation/ComputedTimingFunction.h b/dom/animation/ComputedTimingFunction.h
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+++ b/dom/animation/ComputedTimingFunction.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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