| 1 | import { |
| 2 | CSSProperties, |
| 3 | useLayoutEffect, |
| 4 | useRef, |
| 5 | useState, |
| 6 | useMemo, |
| 7 | } from 'react' |
| 8 | import { Breadcrumb } from 'components/docs/Breadcrumb' |
| 9 | import { LayoutProps } from 'components/docs/Layout' |
| 10 | import { Navigation } from 'components/docs/Navigation' |
| 11 | |
| 12 | export const Desktop: React.FC<LayoutProps> = ({ |
| 13 | breadcrumbs, |
| 14 | children, |
| 15 | manifest, |
| 16 | slug, |
| 17 | }) => { |
| 18 | const sidebarRef = useRef<HTMLDivElement>(null) |
| 19 | const sidebarContentRef = useRef<HTMLDivElement>(null) |
| 20 | const headerHeightDetecterRef = useRef<HTMLDivElement>(null) |
| 21 | |
| 22 | const [stickyGap, setStickyGap] = useState(0) |
| 23 | const [isScrollDown, setIsScrollDown] = useState(true) |
| 24 | const [sidebarScrollable, setSidebarScrollable] = useState(false) |
| 25 | |
| 26 | useLayoutEffect(() => { |
| 27 | let previousScrollY = window.scrollY |
| 28 | |
| 29 | const handleScroll = () => { |
| 30 | // Get header height |
| 31 | const headerHeight = headerHeightDetecterRef.current?.clientHeight || 80 |
| 32 | |
| 33 | // Detect whether sidebar is scrollable |
| 34 | const sidebarElm = sidebarRef.current |
| 35 | const sidebarRect = sidebarElm?.getBoundingClientRect() |
| 36 | const parentElm = sidebarElm?.parentElement |
| 37 | const parentRect = parentElm?.getBoundingClientRect() |
| 38 | |
| 39 | if (sidebarContentRef.current && sidebarRect && parentRect) { |
| 40 | const viewHeight = Math.max( |
| 41 | 0, |
| 42 | Math.min(window.innerHeight, parentRect.bottom) - headerHeight |
| 43 | ) |
| 44 | |
| 45 | setSidebarScrollable( |
| 46 | viewHeight < sidebarContentRef.current.clientHeight |
| 47 | ) |
| 48 | } |
| 49 | |
| 50 | // Handle scroll |
| 51 | const resetStickyGap = (base: 'top' | 'bottom') => { |
| 52 | if (sidebarRect && parentRect) { |
| 53 | setStickyGap(sidebarRect[base] - parentRect[base]) |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | const { scrollY } = window |
| 58 | const scrollDelta = scrollY - previousScrollY |
| 59 | |
| 60 | if (scrollDelta < 0) { |
| 61 | // Scroll up |
| 62 | setIsScrollDown((prev) => { |
| 63 | if (prev) resetStickyGap('bottom') |
| 64 | return false |
| 65 | }) |
| 66 | } else { |
| 67 | // Scroll down |
| 68 | setIsScrollDown((prev) => { |
| 69 | if (!prev) resetStickyGap('top') |
| 70 | return true |
| 71 | }) |
| 72 | } |
| 73 | previousScrollY = scrollY |
| 74 | } |
| 75 | |
| 76 | window.addEventListener('scroll', handleScroll) |
| 77 | window.addEventListener('resize', handleScroll) |
| 78 | |
| 79 | return () => { |
| 80 | window.removeEventListener('scroll', handleScroll) |
| 81 | window.removeEventListener('resize', handleScroll) |
| 82 | } |
| 83 | }, []) |
| 84 | |
| 85 | const sidebarStyle = useMemo<CSSProperties>(() => { |
| 86 | if (!sidebarScrollable) |
| 87 | return { alignSelf: 'start', top: 'var(--header-height)' } |
| 88 | |
| 89 | return { |
| 90 | alignSelf: isScrollDown ? 'end' : 'start', |
| 91 | top: !isScrollDown ? `var(--header-height)` : '', |
| 92 | bottom: isScrollDown ? `0px` : '', |
| 93 | marginBottom: stickyGap < 0 ? `${-stickyGap}px` : 0, |
| 94 | marginTop: stickyGap >= 0 ? `${stickyGap}px` : 0, |
| 95 | } |
| 96 | }, [isScrollDown, sidebarScrollable, stickyGap]) |
| 97 | |
| 98 | return ( |
| 99 | <> |
| 100 | <div |
| 101 | ref={headerHeightDetecterRef} |
| 102 | className="fixed top-0 left-0 -z-10 h-[var(--header-height)] w-px opacity-0" |
| 103 | /> |
| 104 | <div id="docs-container" className="text-sm xl:text-base"> |
| 105 | <div ref={sidebarRef} id="docs-sidebar" style={sidebarStyle}> |
| 106 | <div ref={sidebarContentRef} className="sidebar-nav-content"> |
| 107 | <Navigation manifest={manifest} slug={slug} /> |
| 108 | </div> |
| 109 | </div> |
| 110 | <div className="my-6 w-px bg-gray-400" style={{ gridArea: 'border' }} /> |
| 111 | <div className="[grid-area:contents]"> |
| 112 | <div className="px-8 py-10"> |
| 113 | {breadcrumbs?.length && ( |
| 114 | <div className="mb-6 rounded bg-gray-300 p-2"> |
| 115 | <Breadcrumb breadcrumbs={breadcrumbs} /> |
| 116 | </div> |
| 117 | )} |
| 118 | <article id="docs-article" className="container"> |
| 119 | {children} |
| 120 | </article> |
| 121 | </div> |
| 122 | </div> |
| 123 | </div> |
| 124 | {/* <div ref={docsClearfixRef} /> */} |
| 125 | <style jsx>{` |
| 126 | #docs-container { |
| 127 | @apply grid; |
| 128 | |
| 129 | min-height: inherit; |
| 130 | grid-template: |
| 131 | 'sidebar border contents' auto |
| 132 | / minmax(16rem, 20%) 1px minmax(0, 1fr); |
| 133 | } |
| 134 | |
| 135 | #docs-sidebar { |
| 136 | @apply sticky [grid-area:sidebar]; |
| 137 | } |
| 138 | |
| 139 | #docs-article { |
| 140 | @apply mx-auto px-6; |
| 141 | |
| 142 | --root-font-size: 0.9rem; |
| 143 | } |
| 144 | |
| 145 | .sidebar-nav-content { |
| 146 | @apply mx-auto w-64 px-8 py-10; |
| 147 | |
| 148 | min-width: 16rem; |
| 149 | } |
| 150 | |
| 151 | @screen xl { |
| 152 | #docs-container { |
| 153 | grid-template: |
| 154 | 'sidebar border contents nav' auto |
| 155 | / minmax(16rem, 20%) 1px minmax(0, 1fr) minmax(8rem, 15%); |
| 156 | } |
| 157 | |
| 158 | #docs-article { |
| 159 | --root-font-size: 1rem; |
| 160 | } |
| 161 | |
| 162 | .sidebar-nav-content { |
| 163 | @apply w-5/6; |
| 164 | } |
| 165 | } |
| 166 | `}</style> |
| 167 | </> |
| 168 | ) |
| 169 | } |
| 170 |