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import { is } from '@react-spring/shared'
import { Animated, Payload } from './Animated'
/** An animated number or a native attribute value */
export class AnimatedValue<T = any> extends Animated {
done = true
elapsedTime!: number
lastPosition!: number
lastVelocity?: number | null
v0?: number | null
durationProgress = 0
constructor(protected _value: T) {
super()
if (is.num(this._value)) {
this.lastPosition = this._value
}
}
/** @internal */
static create(value: any) {
return new AnimatedValue(value)
}
getPayload(): Payload {
return [this]
}
getValue() {
return this._value
}
setValue(value: T, step?: number) {
if (is.num(value)) {
this.lastPosition = value
if (step) {
value = (Math.round(value / step) * step) as any
if (this.done) {
this.lastPosition = value as any
}
}
}
if (this._value === value) {
return false
}
this._value = value
return true
}
reset() {
const { done } = this
this.done = false
if (is.num(this._value)) {
this.elapsedTime = 0
this.durationProgress = 0
this.lastPosition = this._value
if (done) this.lastVelocity = null
this.v0 = null
}
}
}
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