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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 */
#ifndef nsAnimationManager_h_
#define nsAnimationManager_h_
#include "mozilla/Attributes.h"
#include "AnimationCommon.h"
#include "mozilla/dom/CSSAnimation.h"
#include "mozilla/Keyframe.h"
#include "mozilla/MemoryReporting.h"
#include "nsISupportsImpl.h"
#include "nsTHashSet.h"
class ServoCSSAnimationBuilder;
struct nsStyleUIReset;
namespace mozilla {
class ComputedStyle;
enum class PseudoStyleType : uint8_t;
struct NonOwningAnimationTarget;
} /* namespace mozilla */
class nsAnimationManager final
: public mozilla::CommonAnimationManager<mozilla::dom::CSSAnimation> {
explicit nsAnimationManager(nsPresContext* aPresContext)
: mozilla::CommonAnimationManager<mozilla::dom::CSSAnimation>(
aPresContext) {}
typedef mozilla::AnimationCollection<mozilla::dom::CSSAnimation>
typedef nsTArray<RefPtr<mozilla::dom::CSSAnimation>>
~nsAnimationManager() override = default;
* This function does the same thing as the above UpdateAnimations()
* but with servo's computed values.
void UpdateAnimations(mozilla::dom::Element* aElement,
mozilla::PseudoStyleType aPseudoType,
const mozilla::ComputedStyle* aComputedValues);
// Utility function to walk through |aIter| to find the Keyframe with
// matching offset and timing function but stopping as soon as the offset
// differs from |aOffset| (i.e. it assumes a sorted iterator).
// If a matching Keyframe is found,
// Returns true and sets |aIndex| to the index of the matching Keyframe
// within |aIter|.
// If no matching Keyframe is found,
// Returns false and sets |aIndex| to the index in the iterator of the
// first Keyframe with an offset differing to |aOffset| or, if the end
// of the iterator is reached, sets |aIndex| to the index after the last
// Keyframe.
template <class IterType>
static bool FindMatchingKeyframe(
IterType&& aIter, double aOffset,
const mozilla::StyleComputedTimingFunction& aTimingFunctionToMatch,
mozilla::dom::CompositeOperationOrAuto aCompositionToMatch,
size_t& aIndex) {
aIndex = 0;
for (mozilla::Keyframe& keyframe : aIter) {
if (keyframe.mOffset.value() != aOffset) {
const bool matches = [&] {
if (keyframe.mComposite != aCompositionToMatch) {
return false;
return keyframe.mTimingFunction
? *keyframe.mTimingFunction == aTimingFunctionToMatch
: aTimingFunctionToMatch.IsLinearKeyword();
if (matches) {
return true;
return false;
bool AnimationMayBeReferenced(nsAtom* aName) const {
return mMaybeReferencedAnimations.Contains(aName);
// This includes all animation names referenced regardless of whether a
// corresponding `@keyframes` rule is available.
// It may contain names which are no longer referenced, but it should always
// contain names which are currently referenced, so that it is usable for
// style invalidation.
nsTHashSet<RefPtr<nsAtom>> mMaybeReferencedAnimations;
void DoUpdateAnimations(const mozilla::NonOwningAnimationTarget& aTarget,
const nsStyleUIReset& aStyle,
ServoCSSAnimationBuilder& aBuilder);
#endif /* !defined(nsAnimationManager_h_) */