litho-core/com.facebook.litho.animation/AnimationFrameInvalidation

AnimationFrameInvalidation

data class AnimationFrameInvalidation(val stateId: StateId, val isLayoutState: Boolean, val attribution: String?)

A stable descriptor of an animated value's invalidation, recorded each frame the value changes.

This is a framework-internal contract between AnimatedValue and StateUpdater.applyAnimationFrameUpdates. Its fields are all fixed for the lifetime of the producing AnimatedValue, so a single instance is cached on the value and reused every frame rather than allocated per frame. It carries only what is needed to invalidate the readers of stateId; the animated value itself stays owned by the AnimatedValue, so this is an invalidation key, not a state mutation.

Constructors

constructor(stateId: StateId, isLayoutState: Boolean, attribution: String?)

Properties

attribution

val attribution: String?

debug attribution string for tracing.

isLayoutState

val isLayoutState: Boolean

whether the producing hook was created in a layout context; threaded into the hook-state update path exactly as the existing animated path does.

stateId

val stateId: StateId

the animated value's state id, used to locate its read-tracked consumers.