444 lines
12 KiB
TypeScript
444 lines
12 KiB
TypeScript
import React, {
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useCallback,
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useEffect,
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useMemo,
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useRef,
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useState,
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} from "react";
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export type LogoItem =
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| {
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node: React.ReactNode;
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href?: string;
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title?: string;
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ariaLabel?: string;
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}
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| {
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src: string;
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alt?: string;
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href?: string;
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title?: string;
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srcSet?: string;
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sizes?: string;
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width?: number;
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height?: number;
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};
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export interface LogoLoopProps {
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logos: LogoItem[];
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speed?: number;
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direction?: "left" | "right";
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width?: number | string;
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logoHeight?: number;
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gap?: number;
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pauseOnHover?: boolean;
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fadeOut?: boolean;
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fadeOutColor?: string;
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scaleOnHover?: boolean;
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ariaLabel?: string;
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className?: string;
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style?: React.CSSProperties;
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}
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const ANIMATION_CONFIG = {
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SMOOTH_TAU: 0.25,
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MIN_COPIES: 2,
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COPY_HEADROOM: 2,
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} as const;
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const toCssLength = (value?: number | string): string | undefined =>
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typeof value === "number" ? `${value}px` : (value ?? undefined);
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const cx = (...parts: Array<string | false | null | undefined>) =>
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parts.filter(Boolean).join(" ");
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const useResizeObserver = (
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callback: () => void,
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elements: Array<React.RefObject<Element | null>>,
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dependencies: React.DependencyList,
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) => {
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useEffect(() => {
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if (!window.ResizeObserver) {
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const handleResize = () => callback();
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window.addEventListener("resize", handleResize);
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callback();
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return () => window.removeEventListener("resize", handleResize);
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}
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const observers = elements.map((ref) => {
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if (!ref.current) return null;
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const observer = new ResizeObserver(callback);
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observer.observe(ref.current);
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return observer;
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});
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callback();
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return () => {
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observers.forEach((observer) => observer?.disconnect());
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};
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}, dependencies);
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};
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const useImageLoader = (
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seqRef: React.RefObject<HTMLUListElement | null>,
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onLoad: () => void,
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dependencies: React.DependencyList,
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) => {
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useEffect(() => {
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const images = seqRef.current?.querySelectorAll("img") ?? [];
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if (images.length === 0) {
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onLoad();
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return;
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}
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let remainingImages = images.length;
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const handleImageLoad = () => {
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remainingImages -= 1;
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if (remainingImages === 0) {
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onLoad();
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}
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};
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images.forEach((img) => {
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const htmlImg = img as HTMLImageElement;
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if (htmlImg.complete) {
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handleImageLoad();
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} else {
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htmlImg.addEventListener("load", handleImageLoad, { once: true });
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htmlImg.addEventListener("error", handleImageLoad, { once: true });
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}
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});
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return () => {
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images.forEach((img) => {
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img.removeEventListener("load", handleImageLoad);
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img.removeEventListener("error", handleImageLoad);
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});
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};
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}, dependencies);
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};
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const useAnimationLoop = (
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trackRef: React.RefObject<HTMLDivElement | null>,
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targetVelocity: number,
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seqWidth: number,
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isHovered: boolean,
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pauseOnHover: boolean,
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) => {
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const rafRef = useRef<number | null>(null);
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const lastTimestampRef = useRef<number | null>(null);
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const offsetRef = useRef(0);
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const velocityRef = useRef(0);
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useEffect(() => {
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const track = trackRef.current;
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if (!track) return;
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const prefersReduced =
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typeof window !== "undefined" &&
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window.matchMedia &&
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window.matchMedia("(prefers-reduced-motion: reduce)").matches;
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if (seqWidth > 0) {
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offsetRef.current =
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((offsetRef.current % seqWidth) + seqWidth) % seqWidth;
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track.style.transform = `translate3d(${-offsetRef.current}px, 0, 0)`;
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}
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if (prefersReduced) {
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track.style.transform = "translate3d(0, 0, 0)";
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return () => {
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lastTimestampRef.current = null;
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};
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}
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const animate = (timestamp: number) => {
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if (lastTimestampRef.current === null) {
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lastTimestampRef.current = timestamp;
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}
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const deltaTime =
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Math.max(0, timestamp - lastTimestampRef.current) / 1000;
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lastTimestampRef.current = timestamp;
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const target = pauseOnHover && isHovered ? 0 : targetVelocity;
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const easingFactor =
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1 - Math.exp(-deltaTime / ANIMATION_CONFIG.SMOOTH_TAU);
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velocityRef.current += (target - velocityRef.current) * easingFactor;
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if (seqWidth > 0) {
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let nextOffset = offsetRef.current + velocityRef.current * deltaTime;
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nextOffset = ((nextOffset % seqWidth) + seqWidth) % seqWidth;
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offsetRef.current = nextOffset;
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const translateX = -offsetRef.current;
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track.style.transform = `translate3d(${translateX}px, 0, 0)`;
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}
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rafRef.current = requestAnimationFrame(animate);
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};
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rafRef.current = requestAnimationFrame(animate);
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return () => {
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if (rafRef.current !== null) {
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cancelAnimationFrame(rafRef.current);
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rafRef.current = null;
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}
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lastTimestampRef.current = null;
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};
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}, [targetVelocity, seqWidth, isHovered, pauseOnHover]);
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};
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export const LogoLoop = React.memo<LogoLoopProps>(
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({
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logos,
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speed = 120,
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direction = "left",
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width = "100%",
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logoHeight = 28,
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gap = 32,
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pauseOnHover = true,
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fadeOut = false,
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fadeOutColor,
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scaleOnHover = false,
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ariaLabel = "Partner logos",
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className,
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style,
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}) => {
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const containerRef = useRef<HTMLDivElement>(null);
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const trackRef = useRef<HTMLDivElement>(null);
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const seqRef = useRef<HTMLUListElement>(null);
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const [seqWidth, setSeqWidth] = useState<number>(0);
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const [copyCount, setCopyCount] = useState<number>(
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ANIMATION_CONFIG.MIN_COPIES,
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);
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const [isHovered, setIsHovered] = useState<boolean>(false);
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const targetVelocity = useMemo(() => {
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const magnitude = Math.abs(speed);
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const directionMultiplier = direction === "left" ? 1 : -1;
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const speedMultiplier = speed < 0 ? -1 : 1;
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return magnitude * directionMultiplier * speedMultiplier;
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}, [speed, direction]);
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const updateDimensions = useCallback(() => {
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const containerWidth = containerRef.current?.clientWidth ?? 0;
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const sequenceWidth =
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seqRef.current?.getBoundingClientRect?.()?.width ?? 0;
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if (sequenceWidth > 0) {
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setSeqWidth(Math.ceil(sequenceWidth));
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const copiesNeeded =
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Math.ceil(containerWidth / sequenceWidth) +
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ANIMATION_CONFIG.COPY_HEADROOM;
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setCopyCount(Math.max(ANIMATION_CONFIG.MIN_COPIES, copiesNeeded));
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}
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}, []);
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useResizeObserver(
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updateDimensions,
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[containerRef, seqRef],
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[logos, gap, logoHeight],
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);
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useImageLoader(seqRef, updateDimensions, [logos, gap, logoHeight]);
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useAnimationLoop(
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trackRef,
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targetVelocity,
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seqWidth,
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isHovered,
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pauseOnHover,
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);
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const cssVariables = useMemo(
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() =>
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({
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"--logoloop-gap": `${gap}px`,
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"--logoloop-logoHeight": `${logoHeight}px`,
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...(fadeOutColor && { "--logoloop-fadeColor": fadeOutColor }),
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}) as React.CSSProperties,
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[gap, logoHeight, fadeOutColor],
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);
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const rootClasses = useMemo(
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() =>
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cx(
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"relative overflow-x-hidden group",
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"[--logoloop-gap:32px]",
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"[--logoloop-logoHeight:28px]",
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"[--logoloop-fadeColorAuto:#ffffff]",
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"dark:[--logoloop-fadeColorAuto:#0b0b0b]",
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scaleOnHover && "py-[calc(var(--logoloop-logoHeight)*0.1)]",
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className,
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),
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[scaleOnHover, className],
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);
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const handleMouseEnter = useCallback(() => {
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if (pauseOnHover) setIsHovered(true);
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}, [pauseOnHover]);
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const handleMouseLeave = useCallback(() => {
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if (pauseOnHover) setIsHovered(false);
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}, [pauseOnHover]);
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const renderLogoItem = useCallback(
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(item: LogoItem, key: React.Key) => {
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const isNodeItem = "node" in item;
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const content = isNodeItem ? (
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<span
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className={cx(
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"inline-flex items-center",
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"motion-reduce:transition-none",
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scaleOnHover &&
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"transition-transform duration-300 ease-[cubic-bezier(0.4,0,0.2,1)] group-hover/item:scale-120",
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)}
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aria-hidden={!!(item as any).href && !(item as any).ariaLabel}
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>
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{(item as any).node}
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</span>
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) : (
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<img
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className={cx(
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"h-[var(--logoloop-logoHeight)] w-auto block object-contain",
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"[-webkit-user-drag:none] pointer-events-none",
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"[image-rendering:-webkit-optimize-contrast]",
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"motion-reduce:transition-none",
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scaleOnHover &&
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"transition-transform duration-300 ease-[cubic-bezier(0.4,0,0.2,1)] group-hover/item:scale-120",
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)}
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src={(item as any).src}
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srcSet={(item as any).srcSet}
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sizes={(item as any).sizes}
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width={(item as any).width}
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height={(item as any).height}
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alt={(item as any).alt ?? ""}
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title={(item as any).title}
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loading="lazy"
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decoding="async"
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draggable={false}
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/>
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);
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const itemAriaLabel = isNodeItem
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? ((item as any).ariaLabel ?? (item as any).title)
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: ((item as any).alt ?? (item as any).title);
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const inner = (item as any).href ? (
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<a
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className={cx(
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"inline-flex items-center no-underline rounded",
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"transition-opacity duration-200 ease-linear",
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"hover:opacity-80",
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"focus-visible:outline focus-visible:outline-current focus-visible:outline-offset-2",
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)}
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href={(item as any).href}
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aria-label={itemAriaLabel || "logo link"}
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target="_blank"
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rel="noreferrer noopener"
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>
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{content}
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</a>
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) : (
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content
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);
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return (
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<li
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className={cx(
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"flex-none mr-[var(--logoloop-gap)] text-[length:var(--logoloop-logoHeight)] leading-[1]",
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scaleOnHover && "overflow-visible group/item",
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)}
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key={key}
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role="listitem"
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>
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{inner}
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</li>
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);
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},
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[scaleOnHover],
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);
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const logoLists = useMemo(
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() =>
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Array.from({ length: copyCount }, (_, copyIndex) => (
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<ul
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className="flex items-center"
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key={`copy-${copyIndex}`}
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role="list"
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aria-hidden={copyIndex > 0}
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ref={copyIndex === 0 ? seqRef : undefined}
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>
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{logos.map((item, itemIndex) =>
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renderLogoItem(item, `${copyIndex}-${itemIndex}`),
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)}
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</ul>
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)),
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[copyCount, logos, renderLogoItem],
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);
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const containerStyle = useMemo(
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(): React.CSSProperties => ({
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width: toCssLength(width) ?? "100%",
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...cssVariables,
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...style,
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}),
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[width, cssVariables, style],
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);
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return (
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<div
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ref={containerRef}
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className={rootClasses}
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style={containerStyle}
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role="region"
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aria-label={ariaLabel}
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onMouseEnter={handleMouseEnter}
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onMouseLeave={handleMouseLeave}
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>
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{fadeOut && (
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<>
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<div
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aria-hidden
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className={cx(
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"pointer-events-none absolute inset-y-0 left-0 z-[1]",
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"w-[clamp(24px,8%,120px)]",
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"bg-[linear-gradient(to_right,var(--logoloop-fadeColor,var(--logoloop-fadeColorAuto))_0%,rgba(0,0,0,0)_100%)]",
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)}
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/>
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<div
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aria-hidden
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className={cx(
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"pointer-events-none absolute inset-y-0 right-0 z-[1]",
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"w-[clamp(24px,8%,120px)]",
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"bg-[linear-gradient(to_left,var(--logoloop-fadeColor,var(--logoloop-fadeColorAuto))_0%,rgba(0,0,0,0)_100%)]",
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)}
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/>
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</>
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)}
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<div
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className={cx(
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"flex w-max will-change-transform select-none",
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"motion-reduce:transform-none",
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)}
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ref={trackRef}
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>
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{logoLists}
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</div>
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</div>
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);
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},
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);
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LogoLoop.displayName = "LogoLoop";
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export default LogoLoop;
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