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import { useEffect, useRef, useState } from "react"; import { AnimatePresence, motion } from "motion/react"; import { useReducedMotion } from "@/hooks/use-reduced-motion"; import { cn } from "@/lib/utils"; // Long enough to read a short caption, the same as Instagram's default. const DURATION = 4000; // Shorter presses are taps that navigate; longer ones are holds that pause. const HOLD_MS = 200; const ICON_SWAP = { type: "spring", duration: 0.3, bounce: 0 } as const; export type Story = { value: string; caption: string }; export function StoryProgress({ stories, className, }: { stories: Story[]; className?: string; }) { const reduce = useReducedMotion(); const [index, setIndex] = useState(0); // Auto-advancing stays silent; only stories the user moved to are announced. const [manual, setManual] = useState(false); const [pressing, setPressing] = useState(false); const [held, setHeld] = useState(false); const [toggled, setToggled] = useState(false); const [hidden, setHidden] = useState(false); const paused = pressing || toggled || hidden; const pausedRef = useRef(paused); const fills = useRef<(HTMLSpanElement | null)[]>([]); const timer = useRef(null); const holdTimer = useRef>(undefined); const count = stories.length; const go = (step: number) => { setManual(true); setIndex((i) => (i + step + count) % count); }; // A compositor-driven transform animation is the timer itself: when it // finishes, the story advances, so the bar and the content can't drift. useEffect(() => { const fill = fills.current[index]; if (!fill) return; const animation = fill.animate( [{ transform: "scaleX(0)" }, { transform: "scaleX(1)" }], { duration: DURATION, easing: "linear", fill: "forwards" }, ); if (pausedRef.current) animation.pause(); animation.onfinish = () => { setManual(false); setIndex((i) => (i + 1) % count); }; timer.current = animation; return () => animation.cancel(); }, [index, count]); useEffect(() => { pausedRef.current = paused; const animation = timer.current; if (!animation) return; if (paused) animation.pause(); else if (animation.playState === "paused") animation.play(); }, [paused]); useEffect(() => { const sync = () => setHidden(document.hidden); document.addEventListener("visibilitychange", sync); return () => document.removeEventListener("visibilitychange", sync); }, []); useEffect(() => () => clearTimeout(holdTimer.current), []); const release = (navigate: boolean, clientX = 0, box?: DOMRect) => { clearTimeout(holdTimer.current); setPressing(false); if (held) setHeld(false); else if (navigate && box) go(clientX < box.left + box.width / 2 ? -1 : 1); }; const story = stories[index]; const dimmed = held || toggled; return (

{ if (e.button !== 0) return; e.currentTarget.setPointerCapture(e.pointerId); // The fill freezes the moment you press; the dim waits until it is // clearly a hold, so quick taps don't flicker. setPressing(true); holdTimer.current = setTimeout(() => setHeld(true), HOLD_MS); }} onPointerUp={(e) => release(true, e.clientX, e.currentTarget.getBoundingClientRect()) } onPointerCancel={() => release(false)} onContextMenu={(e) => e.preventDefault()} onKeyDown={(e) => { if (e.key === "ArrowRight") go(1); else if (e.key === "ArrowLeft") go(-1); else if (e.key === " " && !e.repeat) setToggled((t) => !t); else return; e.preventDefault(); }} >

{stories.map((_, i) => ( { fills.current[i] = el; }} className="block h-full origin-left rounded-full bg-foreground" style={{ transform: `scaleX(${i < index ? 1 : 0})` }} /> ))}

{index + 1} / {count} {/* Static cue for the paused state, so the frozen bar isn't the only signal. */}

{story.value} {story.caption} {/* A persistent region: one that mounts with its content is rarely read. */}

{story.value}. {story.caption}

{/* Reachable by screen readers; pointer taps are handled by the card, so a real click (detail > 0) is ignored here to avoid a double step. */}

); } function PlayPause({ paused }: { paused: boolean }) { return ( {/* Nudged right of centre so the triangle looks optically centred. */} ); } const STORIES: Story[] = [ { value: "12k", caption: "People tried the lab this week." }, { value: "4.8", caption: "Average rating across every component." }, { value: "38%", caption: "Fewer layout shifts since the last release." }, { value: "212", caption: "Commits that were only about easing curves." }, { value: "0", caption: "Components that animate from scale zero." }, ]; export default function StoryProgressDemo() { return ; } 5f:["$","div",null,{"className":"mt-3 flex min-h-0 min-w-0 flex-1 flex-col gap-3","children":[["$","div",null,{"className":"flex shrink-0 items-start gap-3","children":[["$","div",null,{"className":"flex max-h-28 min-w-0 flex-1 flex-wrap items-center gap-2 overflow-y-auto","children":[["$","ul",null,{"className":"flex min-w-0 flex-wrap gap-2","aria-label":"Package dependencies","children":[["$","li","motion",{"className":"min-w-0 max-w-full","children":["$","a",null,{"href":"https://www.npmjs.com/package/motion","target":"_blank","rel":"noopener noreferrer","className":"flex max-w-full min-w-0 items-center gap-1.5 rounded-md border px-2 py-1.5 text-xs","children":[["$","svg",null,{"viewBox":"0 0 24 24","className":"size-3 shrink-0","children":["$","path",null,{"d":"M1.763 0C.786 0 0 .786 0 1.763v20.474C0 23.214.786 24 1.763 24h20.474c.977 0 1.763-.786 1.763-1.763V1.763C24 .786 23.214 0 22.237 0zM5.13 5.323l13.837.019-.009 13.836h-3.464l.01-10.382h-3.456L12.04 19.17H5.113z","fill":"currentColor"}]}],["$","span",null,{"className":"min-w-0 break-all text-xs font-medium","children":"motion"}]]}]}]]}],["$","$L60",null,{"namespace":"@xevrion","registryDependencies":["utils"]}]]}],["$","$L61",null,{"children":["$","div",null,{"className":"@container","children":["$","div",null,{"className":"grid grid-cols-1 gap-4 @xl:grid-cols-2","children":[["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Light Mode"}],["$","div",null,{"children":["$","$L62",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"0 0 0 1px oklch(0 0 0 / 0.06), 0 1px 2px oklch(0 0 0 / 0.06), 0 6px 16px -6px oklch(0 0 0 / 0.12)"}]]}]]}],["$","$L63",null,{"orientation":"horizontal"}]]}]}]]}],["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Dark Mode"}],["$","div",null,{"children":["$","$L62",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"0 0 0 1px oklch(1 0 0 / 0.08), 0 1px 2px oklch(0 0 0 / 0.4), 0 6px 16px -6px oklch(0 0 0 / 0.6)"}]]}]]}],["$","$L63",null,{"orientation":"horizontal"}]]}]}]]}],["$","div",null,{"className":"flex flex-col border rounded-md","children":[["$","p",null,{"className":"text-sm font-medium border-b p-2","children":"Theme"}],["$","div",null,{"children":["$","$L62",null,{"type":"always","className":"h-80 px-2","children":[["$","div",null,{"className":"gap-2 pb-8 flex flex-col pt-4","children":[["$","div","shadow-raised",{"className":"items-start gap-1 grid grid-cols-2 text-sm","children":[["$","div",null,{"className":"hover:bg-muted/50 py-2","children":["$","p",null,{"className":"text-foreground/80 text-sm","children":["--","shadow-raised",":"]}]}],["$","div",null,{"className":"hover:bg-muted/50 py-2 px-1 rounded-md w-full","children":"var(--shadow-raised)"}]]}]]}],["$","$L63",null,{"orientation":"horizontal"}]]}]}]]}],null]}]}]}]]}],["$","$L64",null,{"files":[{"path":"components/story-progress.tsx","content":"$65","type":"registry:component"},{"path":"hooks/use-reduced-motion.ts","content":"\"use client\";\n\nimport { useSyncExternalStore } from \"react\";\n\n// Motion's useReducedMotion reads the media query on the very first client\n// render, but the server can't know it, so every component that renders\n// differently under reduced motion broke hydration for those users. 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