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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import { forwardRef, HTMLAttributes, useEffect, useMemo, useRef, useState } from 'react' | ||
| import { mergeRefs } from '@equinor/eds-utils' | ||
| import { StickyMenuData } from '../../types/index' | ||
| import StickyMenu from '@sections/StickyMenu/StickyMenu' | ||
|
|
||
| export type TopbarProps = { | ||
| stickyMenuData?: StickyMenuData | ||
| } & HTMLAttributes<HTMLDivElement> | ||
|
|
||
| export const Topbar = forwardRef<HTMLDivElement, TopbarProps>(function Topbar( | ||
| { stickyMenuData, children, ...rest }, | ||
| ref, | ||
| ) { | ||
| const topbarRef = useRef<HTMLDivElement>(null) | ||
| const combinedTopbarRef = useMemo(() => mergeRefs<HTMLDivElement>(topbarRef, ref), [topbarRef, ref]) | ||
|
|
||
| const [height, setHeight] = useState(0) | ||
| const [prevScrollPos, setPrevScrollPos] = useState(0) | ||
| const [isVisible, setIsVisible] = useState(true) | ||
| const [hasDropShadow, setHasDropShadow] = useState(false) | ||
|
|
||
| useEffect(() => { | ||
| if (topbarRef && topbarRef?.current) { | ||
| setHeight(topbarRef.current.getBoundingClientRect().height) | ||
| } | ||
| }, [setHeight, topbarRef]) | ||
|
|
||
| useEffect(() => { | ||
| const handleScroll = () => { | ||
| let currentScrollPos = window.scrollY | ||
| // Fix for iOS to avoid negative scroll positions | ||
| if (currentScrollPos < 0) currentScrollPos = 0 | ||
|
|
||
| setIsVisible( | ||
| (prevScrollPos > currentScrollPos && prevScrollPos - currentScrollPos > height) || | ||
| currentScrollPos < prevScrollPos || | ||
| (currentScrollPos === 0 && prevScrollPos === 0), | ||
| ) | ||
|
|
||
| if (!stickyMenuData) { | ||
| // Why so complicated? To attempt to limit the amount of calls to setHasDropShadow | ||
| if (currentScrollPos < 50) { | ||
| if (hasDropShadow) { | ||
| setHasDropShadow(false) | ||
| } | ||
| } else { | ||
| if (prevScrollPos > currentScrollPos) { | ||
| if (!hasDropShadow) { | ||
| setHasDropShadow(true) | ||
| } | ||
| } else if (prevScrollPos < currentScrollPos && hasDropShadow) { | ||
| setHasDropShadow(false) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| setPrevScrollPos(currentScrollPos) | ||
| } | ||
|
|
||
| window.addEventListener('scroll', handleScroll) | ||
|
|
||
| return () => { | ||
| window.removeEventListener('scroll', handleScroll) | ||
| } | ||
| }, [prevScrollPos, isVisible, height, hasDropShadow, stickyMenuData]) | ||
|
|
||
| useEffect(() => { | ||
| if (topbarRef && topbarRef?.current) { | ||
| const topbar = topbarRef.current | ||
|
|
||
| const handleFocus = (event: FocusEvent) => { | ||
| if (!isVisible) { | ||
| topbar.contains(event.target as Node) && setIsVisible(true) | ||
| } | ||
| } | ||
|
|
||
| topbar.addEventListener('focusin', handleFocus) | ||
|
|
||
| return () => topbar.removeEventListener('focusin', handleFocus) | ||
| } | ||
| }, [isVisible, topbarRef]) | ||
|
|
||
| const animateScrollUpClassName = ` | ||
| [will-change:transform] | ||
| [transition-behavior:allow-discrete] | ||
| animate-height | ||
| ${isVisible ? 'top-0' : '-top-[var(--topbar-height)]'} | ||
| [transition-property:height] | ||
| [transition-property:padding] | ||
| ease-in-out | ||
| duration-400 | ||
| ` | ||
|
|
||
| return ( | ||
| <> | ||
| <div | ||
| ref={combinedTopbarRef} | ||
| className={`w-screen sticky bg-white-100 z-40 ${animateScrollUpClassName} | ||
| ${hasDropShadow ? 'shadow-top-bar' : ''}`} | ||
| {...rest} | ||
| > | ||
| <div className="px-layout-sm max-w-viewport mx-auto flex items-center justify-between py-4">{children}</div> | ||
| </div> | ||
| {stickyMenuData && ( | ||
| <StickyMenu stickyMenuData={stickyMenuData} className={`${isVisible ? 'top-[80px] pt-2' : 'top-0'}`} /> | ||
| )} | ||
| </> | ||
| ) | ||
| }) | ||
| export default Topbar |
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