/* -*- 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_dom_AnimationPropertySegment_h
#define mozilla_dom_AnimationPropertySegment_h

#include "mozilla/ComputedTimingFunction.h"
#include "mozilla/Maybe.h"
#include "mozilla/StyleAnimationValue.h" // For AnimationValue
#include "mozilla/dom/BaseKeyframeTypesBinding.h" // For CompositeOperation

namespace mozilla {

struct AnimationPropertySegment
{
  float mFromKey, mToKey;
  // NOTE: In the case that no keyframe for 0 or 1 offset is specified
  // the unit of mFromValue or mToValue is eUnit_Null.
  AnimationValue mFromValue, mToValue;

  Maybe<ComputedTimingFunction> mTimingFunction;
  dom::CompositeOperation mFromComposite = dom::CompositeOperation::Replace;
  dom::CompositeOperation mToComposite = dom::CompositeOperation::Replace;

  bool HasReplaceableValues() const
  {
    return HasReplaceableFromValue() && HasReplaceableToValue();
  }

  bool HasReplaceableFromValue() const
  {
    return !mFromValue.IsNull() &&
           mFromComposite == dom::CompositeOperation::Replace;
  }

  bool HasReplaceableToValue() const
  {
    return !mToValue.IsNull() &&
           mToComposite == dom::CompositeOperation::Replace;
  }

  bool operator==(const AnimationPropertySegment& aOther) const
  {
    return mFromKey == aOther.mFromKey &&
           mToKey == aOther.mToKey &&
           mFromValue == aOther.mFromValue &&
           mToValue == aOther.mToValue &&
           mTimingFunction == aOther.mTimingFunction &&
           mFromComposite == aOther.mFromComposite &&
           mToComposite == aOther.mToComposite;
  }
  bool operator!=(const AnimationPropertySegment& aOther) const
  {
    return !(*this == aOther);
  }
};

}

#endif // mozilla_dom_AnimationPropertySegment_h
