"use client"; import React, { useEffect, useRef, useState } from "react"; import { motion, useInView } from "motion/react"; import { cn } from "@/lib/utils"; type EncryptedTextProps = { text: string; className?: string; /** * Time in milliseconds between revealing each subsequent real character. * Lower is faster. Defaults to 50ms per character. */ revealDelayMs?: number; /** Optional custom character set to use for the gibberish effect. */ charset?: string; /** * Time in milliseconds between gibberish flips for unrevealed characters. * Lower is more jittery. Defaults to 50ms. */ flipDelayMs?: number; /** CSS class for styling the encrypted/scrambled characters */ encryptedClassName?: string; /** CSS class for styling the revealed characters */ revealedClassName?: string; }; const DEFAULT_CHARSET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()_+-={}[];:,.<>/?"; function generateRandomCharacter(charset: string): string { const index = Math.floor(Math.random() * charset.length); return charset.charAt(index); } function generateGibberishPreservingSpaces( original: string, charset: string, ): string { if (!original) return ""; let result = ""; for (let i = 0; i < original.length; i += 1) { const ch = original[i]; result += ch === " " ? " " : generateRandomCharacter(charset); } return result; } export const EncryptedText: React.FC = ({ text, className, revealDelayMs = 50, charset = DEFAULT_CHARSET, flipDelayMs = 50, encryptedClassName, revealedClassName, }) => { const ref = useRef(null); const isInView = useInView(ref, { once: true }); const [revealCount, setRevealCount] = useState(0); const animationFrameRef = useRef(null); const startTimeRef = useRef(0); const lastFlipTimeRef = useRef(0); const scrambleCharsRef = useRef( text ? generateGibberishPreservingSpaces(text, charset).split("") : [], ); useEffect(() => { if (!isInView) return; // Reset state for a fresh animation whenever dependencies change const initial = text ? generateGibberishPreservingSpaces(text, charset) : ""; scrambleCharsRef.current = initial.split(""); startTimeRef.current = performance.now(); lastFlipTimeRef.current = startTimeRef.current; setRevealCount(0); let isCancelled = false; const update = (now: number) => { if (isCancelled) return; const elapsedMs = now - startTimeRef.current; const totalLength = text.length; const currentRevealCount = Math.min( totalLength, Math.floor(elapsedMs / Math.max(1, revealDelayMs)), ); setRevealCount(currentRevealCount); if (currentRevealCount >= totalLength) { return; } // Re-randomize unrevealed scramble characters on an interval const timeSinceLastFlip = now - lastFlipTimeRef.current; if (timeSinceLastFlip >= Math.max(0, flipDelayMs)) { for (let index = 0; index < totalLength; index += 1) { if (index >= currentRevealCount) { if (text[index] !== " ") { scrambleCharsRef.current[index] = generateRandomCharacter(charset); } else { scrambleCharsRef.current[index] = " "; } } } lastFlipTimeRef.current = now; } animationFrameRef.current = requestAnimationFrame(update); }; animationFrameRef.current = requestAnimationFrame(update); return () => { isCancelled = true; if (animationFrameRef.current !== null) { cancelAnimationFrame(animationFrameRef.current); } }; }, [isInView, text, revealDelayMs, charset, flipDelayMs]); if (!text) return null; return ( {text.split("").map((char, index) => { const isRevealed = index < revealCount; const displayChar = isRevealed ? char : char === " " ? " " : (scrambleCharsRef.current[index] ?? generateRandomCharacter(charset)); return ( {displayChar} ); })} ); };

Encrypted Text

Instalação

Dependências