| 1 | "use client"; |
| 2 | |
| 3 | import Link from "next/link"; |
| 4 | import { usePathname } from "next/navigation"; |
| 5 | import { useCallback, useEffect, useRef, useState } from "react"; |
| 6 | import { createPortal } from "react-dom"; |
| 7 | import { currentNavHref, type ChromeLink } from "@/lib/i18n/links"; |
| 8 | import { Icon } from "./icon"; |
| 9 | import { ArrowLabel } from "./arrow-label"; |
| 10 | |
| 11 | export function MobileMenu({ |
| 12 | links, |
| 13 | moreLinks, |
| 14 | installHref, |
| 15 | installLabel, |
| 16 | signInHref, |
| 17 | signInLabel, |
| 18 | openLabel, |
| 19 | closeLabel, |
| 20 | navAria, |
| 21 | }: { |
| 22 | links: ChromeLink[]; |
| 23 | /** The second group on the sheet: start, install, FAQ, community, contribute. */ |
| 24 | moreLinks: ChromeLink[]; |
| 25 | installHref: string; |
| 26 | installLabel: string; |
| 27 | signInHref: string; |
| 28 | signInLabel: string; |
| 29 | openLabel: string; |
| 30 | closeLabel: string; |
| 31 | /** Accessible name for the dialog's navigation landmark. */ |
| 32 | navAria: string; |
| 33 | }) { |
| 34 | const [open, setOpen] = useState(false); |
| 35 | // `closing` holds the panel mounted for a short exit fade; the unmount — |
| 36 | // and the focus hand-back in the effect below — then happens on the |
| 37 | // timeout, not on the click. |
| 38 | const [closing, setClosing] = useState(false); |
| 39 | const closeTimer = useRef<number | null>(null); |
| 40 | const pathname = usePathname(); |
| 41 | // One link is the page; ancestors are not. See currentNavHref. Both |
| 42 | // groups compete for the one current mark. |
| 43 | const currentHref = currentNavHref([...links, ...moreLinks], pathname); |
| 44 | const toggleRef = useRef<HTMLButtonElement>(null); |
| 45 | const menuRef = useRef<HTMLDivElement>(null); |
| 46 | |
| 47 | const closeImmediately = useCallback(() => { |
| 48 | if (closeTimer.current !== null) window.clearTimeout(closeTimer.current); |
| 49 | closeTimer.current = null; |
| 50 | setOpen(false); |
| 51 | setClosing(false); |
| 52 | }, []); |
| 53 | |
| 54 | const close = useCallback(() => { |
| 55 | // Reduced motion keeps the original instant mount/unmount. |
| 56 | if (window.matchMedia("(prefers-reduced-motion: reduce)").matches) { |
| 57 | closeImmediately(); |
| 58 | return; |
| 59 | } |
| 60 | if (closeTimer.current !== null) window.clearTimeout(closeTimer.current); |
| 61 | setClosing(true); |
| 62 | closeTimer.current = window.setTimeout(() => { |
| 63 | closeTimer.current = null; |
| 64 | setOpen(false); |
| 65 | setClosing(false); |
| 66 | }, 180); |
| 67 | }, [closeImmediately]); |
| 68 | |
| 69 | const onToggle = () => { |
| 70 | if (!open) { |
| 71 | setOpen(true); |
| 72 | return; |
| 73 | } |
| 74 | if (closing) { |
| 75 | // Re-open mid-exit: cancel the pending unmount and stay open. |
| 76 | window.clearTimeout(closeTimer.current ?? undefined); |
| 77 | closeTimer.current = null; |
| 78 | setClosing(false); |
| 79 | return; |
| 80 | } |
| 81 | close(); |
| 82 | }; |
| 83 | |
| 84 | useEffect(() => { |
| 85 | if (!open) return; |
| 86 | const prev = document.body.style.overflow; |
| 87 | document.body.style.overflow = "hidden"; |
| 88 | // aria-modal promises the dialog owns interaction. Keep background roots |
| 89 | // inert, contain keyboard focus, and hand it back to the toggle on close. |
| 90 | const dialog = menuRef.current; |
| 91 | const backgroundRoots = Array.from(document.body.children) |
| 92 | .filter((element): element is HTMLElement => |
| 93 | element instanceof HTMLElement && element !== dialog) |
| 94 | .map((element) => ({ element, wasInert: element.inert })); |
| 95 | for (const { element } of backgroundRoots) element.inert = true; |
| 96 | |
| 97 | // The toggle node is captured now: reading toggleRef.current inside the |
| 98 | // cleanup would race React clearing the ref. |
| 99 | const toggle = toggleRef.current; |
| 100 | const focusable = () => Array.from(dialog?.querySelectorAll<HTMLElement>( |
| 101 | 'a[href], button:not([disabled]), select:not([disabled]), [tabindex]:not([tabindex="-1"])', |
| 102 | ) ?? []).filter((element) => element.getClientRects().length > 0); |
| 103 | focusable()[0]?.focus(); |
| 104 | |
| 105 | const onKey = (e: KeyboardEvent) => { |
| 106 | if (e.key === "Escape") { |
| 107 | e.preventDefault(); |
| 108 | close(); |
| 109 | return; |
| 110 | } |
| 111 | if (e.key !== "Tab") return; |
| 112 | const candidates = focusable(); |
| 113 | const first = candidates[0]; |
| 114 | const last = candidates[candidates.length - 1]; |
| 115 | if (!first || !last) { |
| 116 | e.preventDefault(); |
| 117 | return; |
| 118 | } |
| 119 | const active = document.activeElement; |
| 120 | if (e.shiftKey && (active === first || !dialog?.contains(active))) { |
| 121 | e.preventDefault(); |
| 122 | last.focus(); |
| 123 | } else if (!e.shiftKey && (active === last || !dialog?.contains(active))) { |
| 124 | e.preventDefault(); |
| 125 | first.focus(); |
| 126 | } |
| 127 | }; |
| 128 | |
| 129 | // Tailwind's lg boundary hides the compact controls. Close immediately |
| 130 | // when a live resize crosses it so an invisible sheet cannot retain the |
| 131 | // body's scroll lock. |
| 132 | const desktop = window.matchMedia("(min-width: 1024px)"); |
| 133 | const onDesktop = (event: MediaQueryListEvent | MediaQueryList) => { |
| 134 | if (event.matches) closeImmediately(); |
| 135 | }; |
| 136 | window.addEventListener("keydown", onKey); |
| 137 | desktop.addEventListener("change", onDesktop); |
| 138 | if (desktop.matches) closeImmediately(); |
| 139 | |
| 140 | return () => { |
| 141 | document.body.style.overflow = prev; |
| 142 | window.removeEventListener("keydown", onKey); |
| 143 | desktop.removeEventListener("change", onDesktop); |
| 144 | for (const { element, wasInert } of backgroundRoots) element.inert = wasInert; |
| 145 | if (toggle?.getClientRects().length) toggle.focus(); |
| 146 | }; |
| 147 | }, [close, closeImmediately, open]); |
| 148 | |
| 149 | // A pending exit timer must not outlive the component (locale switches |
| 150 | // remount the nav). |
| 151 | useEffect(() => { |
| 152 | return () => { |
| 153 | if (closeTimer.current !== null) window.clearTimeout(closeTimer.current); |
| 154 | }; |
| 155 | }, []); |
| 156 | |
| 157 | return ( |
| 158 | <> |
| 159 | <button |
| 160 | ref={toggleRef} |
| 161 | type="button" |
| 162 | onClick={onToggle} |
| 163 | className="nav-icon-button lg:hidden" |
| 164 | aria-label={open ? closeLabel : openLabel} |
| 165 | aria-expanded={open} |
| 166 | aria-controls="mobile-menu" |
| 167 | > |
| 168 | <Icon name={open ? "x" : "menu"} className="nav-icon" /> |
| 169 | </button> |
| 170 | |
| 171 | {open && typeof document !== "undefined" && |
| 172 | createPortal(<div |
| 173 | ref={menuRef} |
| 174 | id="mobile-menu" |
| 175 | className={`mm-panel lg:hidden fixed inset-0 z-40 bg-canvas overflow-y-auto${closing ? " mm-closing" : ""}`} |
| 176 | role="dialog" |
| 177 | aria-modal="true" |
| 178 | aria-label={navAria} |
| 179 | > |
| 180 | <div className="flex min-h-[3.85rem] items-center justify-end px-4 hairline-b"> |
| 181 | <button type="button" onClick={close} className="nav-icon-button" aria-label={closeLabel}> |
| 182 | <Icon name="x" className="nav-icon" /> |
| 183 | </button> |
| 184 | </div> |
| 185 | {/* Only one nav landmark is exposed at a time (the desktop nav is |
| 186 | display:none at these widths), so the named dialog carries the |
| 187 | landmark name and the inner nav stays unlabeled — two nested |
| 188 | "Primary" landmarks would read as duplication. */} |
| 189 | <nav className="px-6 py-4"> |
| 190 | <ul className="mm-list"> |
| 191 | {[...links, ...moreLinks].map((l) => { |
| 192 | const isActive = l.href === currentHref; |
| 193 | return ( |
| 194 | <li key={l.href}> |
| 195 | <Link |
| 196 | href={l.href} |
| 197 | onClick={() => setOpen(false)} |
| 198 | className="mm-link" |
| 199 | aria-current={isActive ? "page" : undefined} |
| 200 | > |
| 201 | <span>{l.label}</span> |
| 202 | <Icon name="chevron-right" className="nav-icon mm-link-chevron icon-flip" /> |
| 203 | </Link> |
| 204 | </li> |
| 205 | ); |
| 206 | })} |
| 207 | </ul> |
| 208 | |
| 209 | <Link |
| 210 | href={installHref} |
| 211 | onClick={() => setOpen(false)} |
| 212 | className="mm-action paper-install-cta" |
| 213 | > |
| 214 | <ArrowLabel text={installLabel} /> |
| 215 | </Link> |
| 216 | <Link |
| 217 | href={signInHref} |
| 218 | data-usage="login" |
| 219 | onClick={() => setOpen(false)} |
| 220 | className="mm-action paper-auth-signin" |
| 221 | > |
| 222 | {signInLabel} |
| 223 | </Link> |
| 224 | </nav> |
| 225 | </div>, document.body)} |
| 226 | </> |
| 227 | ); |
| 228 | } |
| 229 |