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* Copyright 2021 Harness Inc. All rights reserved.
* Use of this source code is governed by the PolyForm Shield 1.0.0 license
* that can be found in the licenses directory at the root of this repository, also available at
* https://polyformproject.org/wp-content/uploads/2020/06/PolyForm-Shield-1.0.0.txt.
*/
import React, { useEffect, useLayoutEffect, useRef, useState } from 'react'
import css from './TimeBasedShadedRegion.module.scss'
export interface TimeBasedShadedRegionProps {
top?: number
leftOffset?: number
parentRef?: HTMLDivElement | null
height: number | string
startTime: number
endTime: number
shadedRegionStartTime: number
shadedRegionEndTime: number
}
function computeWidth(
shadedRegionStartTime: number,
shadedRegionEndTime: number,
startTime: number,
endTime: number,
leftOffset?: number,
parentRef?: HTMLDivElement | null
): { width: number; left: number } | undefined {
if (!parentRef) {
return
}
const parentContainerWidth = parentRef.getBoundingClientRect()?.width
const totalTimeDiff = endTime - startTime
const leftPlacement = parentContainerWidth * ((shadedRegionStartTime - startTime) / totalTimeDiff) + (leftOffset ?? 0)
const rightPlacement = parentContainerWidth * ((shadedRegionEndTime - startTime) / totalTimeDiff) + (leftOffset ?? 0)
return {
width: rightPlacement - leftPlacement,
left: leftPlacement
}
}
export function TimeBasedShadedRegion(props: TimeBasedShadedRegionProps): JSX.Element | null {
const { startTime, endTime, top, height, leftOffset, shadedRegionEndTime, shadedRegionStartTime, parentRef } = props
const ref = useRef<HTMLDivElement>(null)
const [info, setInfo] = useState(
computeWidth(shadedRegionStartTime, shadedRegionEndTime, startTime, endTime, leftOffset, parentRef)
)
const onResize = () => {
if (ref.current) {
setInfo(computeWidth(shadedRegionStartTime, shadedRegionEndTime, startTime, endTime, leftOffset, parentRef))
}
}
useLayoutEffect(() => {
window.addEventListener('resize', onResize)
return () => window.removeEventListener('resize', onResize)
}, [])
useEffect(() => {
setInfo(computeWidth(shadedRegionStartTime, shadedRegionEndTime, startTime, endTime, leftOffset, parentRef))
}, [shadedRegionStartTime, shadedRegionEndTime, startTime, leftOffset, endTime, parentRef])
return parentRef && info ? <div className={css.main} ref={ref} style={{ ...info, top: top ?? 0, height }} /> : null
}
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