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@@ -16,6 +16,49 @@ JS::NonnullGCPtr<CSSAnimation> CSSAnimation::create(JS::Realm& realm)
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return realm.heap().allocate<CSSAnimation>(realm, realm);
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}
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+// https://www.w3.org/TR/css-animations-2/#animation-composite-order
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+Optional<int> CSSAnimation::class_specific_composite_order(JS::NonnullGCPtr<Animations::Animation> other_animation) const
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+{
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+ auto other = JS::NonnullGCPtr { verify_cast<CSSAnimation>(*other_animation) };
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+
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+ // The existance of an owning element determines the animation class, so both animations should have their owning
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+ // element in the same state
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+ VERIFY(!m_owning_element == !other->m_owning_element);
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+
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+ // Within the set of CSS Animations with an owning element, two animations A and B are sorted in composite order
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+ // (first to last) as follows:
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+ if (m_owning_element) {
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+ // 1. If the owning element of A and B differs, sort A and B by tree order of their corresponding owning elements.
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+ // With regard to pseudo-elements, the sort order is as follows:
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+ // - element
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+ // - ::marker
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+ // - ::before
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+ // - any other pseudo-elements not mentioned specifically in this list, sorted in ascending order by the Unicode
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+ // codepoints that make up each selector
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+ // - ::after
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+ // - element children
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+ if (m_owning_element.ptr() != other->m_owning_element.ptr()) {
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+ // FIXME: Sort by tree order
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+ return {};
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+ }
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+
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+ // 2. Otherwise, sort A and B based on their position in the computed value of the animation-name property of the
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+ // (common) owning element.
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+ // FIXME: Do this when animation-name supports multiple values
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+ return {};
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+ }
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+
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+ // The composite order of CSS Animations without an owning element is based on their position in the global animation list.
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+ return global_animation_list_order() - other->global_animation_list_order();
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+}
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+
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+Animations::AnimationClass CSSAnimation::animation_class() const
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+{
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+ if (m_owning_element)
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+ return Animations::AnimationClass::CSSAnimationWithOwningElement;
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+ return Animations::AnimationClass::CSSAnimationWithoutOwningElement;
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+}
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+
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CSSAnimation::CSSAnimation(JS::Realm& realm)
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: Animations::Animation(realm)
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{
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