'use client'; import { HTMLMotionProps, motion, MotionValue, SpringOptions, useMotionValue, useReducedMotion, useScroll, UseScrollOptions, useSpring, useTransform, } from 'motion/react'; import React from 'react'; interface WavyTextsConfig { baseOffsetFactor: number; baseExtra: number; baseAmplitude: number; lengthEffect: number; frequency: number; progressScale: number; phaseShiftDeg: number; spring: SpringOptions; } interface WavyBlockItemProps extends HTMLMotionProps<'div'> { index: number; config?: Partial; axis?: 'x' | 'y'; } interface WavyBlockContextValue { scrollYProgress: MotionValue; maxLen: number; } const WavyBlockContext = React.createContext( undefined, ); function useWavyBlockContext() { const context = React.useContext(WavyBlockContext); if (context === undefined) { throw new Error('useWavyBlockContext must be used within a WavyBlock'); } return context; } const toRadian = (deg: number) => (deg * Math.PI) / 180; const TAU = Math.PI * 2; const DEFAULT_X_CONFIG: WavyTextsConfig = { baseOffsetFactor: 0.1, baseExtra: 0, baseAmplitude: 160, lengthEffect: 0.6, frequency: 35, progressScale: 1, phaseShiftDeg: -180, spring: { damping: 22, stiffness: 300 }, }; const DEFAULT_Y_CONFIG: WavyTextsConfig = { ...DEFAULT_X_CONFIG, baseOffsetFactor: 0, baseAmplitude: 120, progressScale: 2, phaseShiftDeg: 0, }; export function WavyBlockItem({ index, axis = 'x', config, style, ...props }: WavyBlockItemProps) { const { scrollYProgress, maxLen } = useWavyBlockContext(); const reducedMotion = useReducedMotion(); const lengthFactor = Math.min(1, Math.max(0, maxLen / (maxLen || 1))); const resolvedConfig = React.useMemo(() => { const defaults = axis === 'y' ? DEFAULT_Y_CONFIG : DEFAULT_X_CONFIG; return { ...defaults, ...config, spring: { ...defaults.spring, ...config?.spring, }, }; }, [axis, config]); const [isMounted, setIsMounted] = React.useState(false); const calculateAxisOffset = React.useCallback( (p: number, viewportSize?: number) => { const phase = resolvedConfig.progressScale * p * TAU; const size = viewportSize ?? (typeof window !== 'undefined' ? axis === 'y' ? window.innerHeight : window.innerWidth : axis === 'y' ? 900 : 1200); const hasManualBaseOffset = config?.baseOffsetFactor !== undefined || config?.baseExtra !== undefined; const baseOffset = axis === 'y' && !hasManualBaseOffset ? 0 : resolvedConfig.baseOffsetFactor * size + resolvedConfig.baseExtra; const amplitudeScale = 1 - resolvedConfig.lengthEffect * lengthFactor; const amplitude = resolvedConfig.baseAmplitude * amplitudeScale; const waveOffset = axis === 'y' ? amplitude * Math.sin( phase + toRadian(resolvedConfig.frequency * index) + toRadian(resolvedConfig.phaseShiftDeg), ) : amplitude * Math.cos( phase + toRadian(resolvedConfig.frequency * index) + toRadian(resolvedConfig.phaseShiftDeg), ); return baseOffset + waveOffset; }, [ resolvedConfig, lengthFactor, index, axis, config?.baseOffsetFactor, config?.baseExtra, ], ); const initialOffset = calculateAxisOffset(0); const rawOffset = useMotionValue(initialOffset); const springOffset = useSpring(rawOffset, resolvedConfig.spring); const offset = reducedMotion ? rawOffset : springOffset; React.useLayoutEffect(() => { setIsMounted(true); }, []); React.useEffect(() => { if (!scrollYProgress || !isMounted) return; const unsub = scrollYProgress.onChange((p) => { const viewportSize = typeof window !== 'undefined' ? axis === 'y' ? window.innerHeight : window.innerWidth : axis === 'y' ? 900 : 1200; const newOffset = calculateAxisOffset(p, viewportSize); rawOffset.set(newOffset); }); return () => { if (unsub) unsub(); }; }, [scrollYProgress, rawOffset, calculateAxisOffset, isMounted, axis]); const motionAxisStyle = axis === 'y' ? { y: offset } : { x: offset }; return ( ); } export function WavyBlock({ offset = ['start end', 'end start'], ...props }: React.ComponentPropsWithRef<'div'> & { offset?: UseScrollOptions['offset']; }) { const containerRef = React.useRef(null); const { current } = containerRef; const maxLen = React.useMemo(() => { if (!current?.children || current.children.length === 0) return 1; const childrenArray = Array.from(current.children); return Math.max( ...childrenArray.map((child) => (child ? String(child).length : 0)), ); }, [current?.children]); const { scrollYProgress } = useScroll({ target: containerRef, offset: offset, }); return (

); } export function WavyBlockSticky({ yRange = [0, 300], yInput = [0, 1], style, ...props }: HTMLMotionProps<'div'> & { yRange?: [number, number]; yInput?: [number, number]; }) { const { scrollYProgress } = useWavyBlockContext(); const y = useTransform(scrollYProgress, yInput, yRange); return ; }