Evandro Fonseca JuniorandClaude Sonnet 5.5
540fe9f87a
Abaixo dos cards, uma cena sticky em que o site de cada projeto rola dentro de um notebook (com um celular ao lado) conforme a pagina rola. Cada projeto tem um trecho com pausa no comeco e no fim; capitulos nomeiam o que esta na tela, levam ao ponto do video e mantem notebook e celular no mesmo trecho do site. So o projeto em cena e os vizinhos baixam video (nada com economizar dados ligado, e o notebook escondido no celular nao baixa). Um bloco da mesma altura segura o lugar antes de montar, para saltos como #contact cairem certo. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
569 lines
21 KiB
TypeScript
569 lines
21 KiB
TypeScript
"use client";
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import {
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type CSSProperties,
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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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import { useReducedMotion } from "@/app/hooks/useReducedMotion";
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import {
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chapterFraction,
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chapterIndexAt,
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getScrubSource,
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getShowcaseAssets,
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mobileFractionAt,
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} from "@/lib/project-showcase";
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import { BrowserFrame, displayUrl } from "./BrowserFrame";
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import { PhoneFrame } from "./PhoneFrame";
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import { useShowcaseItems, useShowcaseOpen } from "./ShowcaseProvider";
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import {
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easeToward,
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locateInReel,
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REEL_HOLD,
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reelOffset,
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videoProgress,
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} from "./showcase-math";
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// a altura do cabeçalho só muda com a largura da janela (tokens em :root): ler o estilo a cada quadro de rolagem é caro
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let headerCache = { width: -1, height: 60 };
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const headerHeight = () => {
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if (headerCache.width !== window.innerWidth)
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headerCache = {
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width: window.innerWidth,
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height:
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Number.parseFloat(
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getComputedStyle(document.documentElement).getPropertyValue(
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"--site-header-height",
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),
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) || 60,
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};
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return headerCache.height;
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};
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/** Verdadeiro enquanto a tela é estreita a ponto de a vitrine mostrar só o celular (o notebook fica escondido). */
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function usePhoneOnly() {
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const [phoneOnly, setPhoneOnly] = useState(false);
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useEffect(() => {
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if (typeof window.matchMedia !== "function") return;
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const query = window.matchMedia("(max-width: 639px)");
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const update = () => setPhoneOnly(query.matches);
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update();
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query.addEventListener("change", update);
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return () => query.removeEventListener("change", update);
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}, []);
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return phoneOnly;
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}
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/** "Economizar dados" ligado: a vitrine fica nos posters, sem baixar os vídeos de rolagem. */
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const saveDataOn = () =>
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(navigator as Navigator & { connection?: { saveData?: boolean } }).connection
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?.saveData === true;
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/** Põe o vídeo no instante `fraction` (0 a 1) sem repetir buscas enquanto a anterior ainda não terminou. */
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function seekVideo(video: HTMLVideoElement | null, fraction: number) {
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if (!video || video.readyState < 1 || !video.duration) return;
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const target = Math.min(
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video.duration - 0.001,
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Math.max(0, fraction * video.duration),
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);
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if (!video.seeking && Math.abs(video.currentTime - target) > 1 / 48)
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video.currentTime = target;
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}
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/** Alguns navegadores móveis só desenham o primeiro quadro de um vídeo que já tocou uma vez. */
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function prime(video: HTMLVideoElement) {
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if (video.dataset.primed) return;
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video.dataset.primed = "true";
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video
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.play()
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.then(() => video.pause())
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.catch(() => {});
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}
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let stopScroll = () => {};
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/** Rola até `top` em menos de um segundo; qualquer gesto do usuário interrompe. */
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function scrollToSmoothly(top: number) {
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stopScroll();
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const from = window.scrollY;
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const distance = top - from;
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const duration = Math.min(900, 380 + Math.abs(distance) * 0.12);
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const started = performance.now();
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let id = 0;
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const stop = () => {
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cancelAnimationFrame(id);
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window.removeEventListener("wheel", stop);
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window.removeEventListener("touchstart", stop);
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};
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stopScroll = stop;
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window.addEventListener("wheel", stop, { passive: true });
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window.addEventListener("touchstart", stop, { passive: true });
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const step = (now: number) => {
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const t = Math.min(1, (now - started) / duration);
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const eased = t < 0.5 ? 4 * t * t * t : 1 - (-2 * t + 2) ** 3 / 2;
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// "instant": o CSS global tem scroll-behavior: smooth e cada quadro já é um passo da animação
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window.scrollTo({ top: from + distance * eased, behavior: "instant" });
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if (t < 1) id = requestAnimationFrame(step);
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else stop();
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};
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id = requestAnimationFrame(step);
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}
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/**
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* Vitrine animada: o site de cada projeto rola dentro de um notebook (e de um celular ao lado) conforme a
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* página rola. A cena fica presa (position: sticky) durante a rolagem de todos os projetos; cada projeto tem
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* um trecho com uma pausa no começo e outra no fim. Capítulos nomeiam o que está na tela; notebook e celular
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* mostram o mesmo trecho do site ao mesmo tempo.
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*
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* Só existe com JavaScript e sem prefers-reduced-motion; antes disso, e nesses casos, os cards fazem o papel.
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*/
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export function ProjectReel() {
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const items = useShowcaseItems();
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const openProject = useShowcaseOpen();
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const reducedMotion = useReducedMotion();
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const [mounted, setMounted] = useState(false);
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const [active, setActive] = useState(0);
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const [chapter, setChapter] = useState(0);
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const [near, setNear] = useState(false);
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const [settled, setSettled] = useState(0);
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const [saveData, setSaveData] = useState(false);
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const phoneOnly = usePhoneOnly();
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const containerRef = useRef<HTMLDivElement>(null);
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const pinRef = useRef<HTMLDivElement>(null);
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const indexRef = useRef<HTMLOListElement>(null);
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const desktopVideos = useRef<Array<HTMLVideoElement | null>>([]);
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const phoneVideos = useRef<Array<HTMLVideoElement | null>>([]);
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const bars = useRef<Array<HTMLElement | null>>([]);
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const live = useRef({
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target: [] as number[],
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smooth: [] as number[],
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active: 0,
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chapter: 0,
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raf: 0,
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last: 0,
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near: false,
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});
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const weights = useMemo(
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() => items.map((item) => item.config.weight),
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[items],
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);
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const weightSum = weights.reduce((sum, weight) => sum + weight, 0);
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useEffect(() => {
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setSaveData(saveDataOn());
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setMounted(true);
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}, []);
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// só o projeto em cena e os vizinhos baixam vídeo; e só depois que a rolagem parou ali (passar voando por
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// um projeto no clique do índice não pode baixar todos os do caminho)
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useEffect(() => {
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const timer = setTimeout(() => setSettled(active), 300);
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return () => clearTimeout(timer);
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}, [active]);
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// na faixa horizontal (tablet e celular) o projeto em cena precisa continuar à vista
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useEffect(() => {
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const list = indexRef.current;
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const button = list?.children[active]?.querySelector("button");
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if (
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!list ||
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!button ||
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list.scrollWidth <= list.clientWidth ||
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typeof list.scrollTo !== "function"
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)
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return;
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list.scrollTo({
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left: Math.max(0, button.offsetLeft - 16),
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behavior: "smooth",
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});
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}, [active]);
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const isAttached = useCallback(
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(index: number) => near && !saveData && Math.abs(index - settled) <= 1,
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[near, saveData, settled],
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);
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// quem saiu da janela solta o arquivo (sem `src` o elemento fica vazio e libera a memória)
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useEffect(() => {
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items.forEach((_, index) => {
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if (isAttached(index)) return;
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for (const video of [
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desktopVideos.current[index],
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phoneVideos.current[index],
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])
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if (video && video.networkState !== 0 && !video.getAttribute("src"))
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video.load();
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});
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}, [items, isAttached]);
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const frame = useCallback(
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(now: number) => {
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const state = live.current;
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const seconds = state.last ? (now - state.last) / 1000 : 0;
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state.last = now;
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let moving = false;
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items.forEach((item, index) => {
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if (Math.abs(index - state.active) > 1) return;
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const before = state.smooth[index] ?? 0;
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const next = easeToward(before, state.target[index] ?? 0, seconds);
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state.smooth[index] = next;
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if (Math.abs(next - (state.target[index] ?? 0)) > 0.0004) moving = true;
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seekVideo(desktopVideos.current[index], next);
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seekVideo(
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phoneVideos.current[index],
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mobileFractionAt(item.config, next),
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);
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const bar = bars.current[index];
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if (bar) bar.style.setProperty("--p", next.toFixed(4));
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});
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const current = items[state.active];
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if (current) {
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const index = chapterIndexAt(
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current.config,
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state.smooth[state.active] ?? 0,
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);
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if (index !== state.chapter) {
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state.chapter = index;
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setChapter(index);
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}
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}
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state.raf = moving ? requestAnimationFrame(frame) : 0;
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},
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[items],
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);
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// um vídeo que acabou de carregar precisa ir ao ponto em que a rolagem já está
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const syncVideos = useCallback(
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(index: number) => {
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const item = items[index];
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const at = live.current.smooth[index] ?? live.current.target[index] ?? 0;
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seekVideo(desktopVideos.current[index], at);
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if (item)
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seekVideo(
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phoneVideos.current[index],
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mobileFractionAt(item.config, at),
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);
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},
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[items],
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);
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const measure = useCallback(() => {
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const container = containerRef.current;
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const pin = pinRef.current;
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// escondida por CSS (tela baixa, por exemplo): sem altura, não há o que medir nem o que carregar
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if (!container || !pin || items.length === 0 || !container.offsetHeight)
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return;
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const state = live.current;
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const rect = container.getBoundingClientRect();
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const scrollable = rect.height - pin.offsetHeight;
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const progress =
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scrollable > 0 ? (headerHeight() - rect.top) / scrollable : 0;
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const { index, local } = locateInReel(weights, progress);
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state.target = items.map((_, i) =>
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i < index ? 1 : i === index ? videoProgress(local) : 0,
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);
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const near =
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rect.top < window.innerHeight * 2 && rect.bottom > -window.innerHeight;
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if (near !== state.near) {
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state.near = near;
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setNear(near);
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}
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if (index !== state.active) {
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state.active = index;
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state.chapter = chapterIndexAt(
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items[index].config,
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state.smooth[index] ?? 0,
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);
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setActive(index);
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setChapter(state.chapter);
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}
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if (state.near && !state.raf) {
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state.last = 0;
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state.raf = requestAnimationFrame(frame);
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}
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}, [frame, items, weights]);
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useEffect(() => {
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if (!mounted || reducedMotion || items.length === 0) return;
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let pending = 0;
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const schedule = () => {
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if (!pending)
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pending = requestAnimationFrame(() => {
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pending = 0;
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measure();
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});
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};
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schedule();
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window.addEventListener("scroll", schedule, { passive: true });
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window.addEventListener("resize", schedule);
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const state = live.current;
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return () => {
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window.removeEventListener("scroll", schedule);
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window.removeEventListener("resize", schedule);
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cancelAnimationFrame(pending);
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cancelAnimationFrame(state.raf);
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state.raf = 0;
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};
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}, [mounted, reducedMotion, items.length, measure]);
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/** Rola até o ponto da vitrine em que o projeto `index` está em `local` (0 a 1) do trecho dele. */
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const scrollToReel = (index: number, local: number) => {
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const container = containerRef.current;
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const pin = pinRef.current;
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if (!container || !pin) return;
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const scrollable = container.offsetHeight - pin.offsetHeight;
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const top = container.getBoundingClientRect().top + window.scrollY;
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// 2px além: garante que a conta caia dentro do trecho
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scrollToSmoothly(
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top - headerHeight() + reelOffset(weights, index, local) * scrollable + 2,
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);
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};
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const goTo = (index: number) => scrollToReel(index, 0);
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const goToChapter = (index: number, chapterIndex: number) => {
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const fraction = chapterFraction(
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items[index].config,
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chapterIndex,
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"desktop",
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);
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scrollToReel(index, REEL_HOLD + fraction * (1 - REEL_HOLD * 2));
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};
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if (items.length === 0 || (mounted && reducedMotion)) return null;
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// antes de montar, um bloco da mesma altura segura o lugar: a página não muda de tamanho quando a vitrine
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// aparece (o salto para #contact, por exemplo, cai no lugar certo); o CSS o esconde sem JavaScript, com
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// prefers-reduced-motion e em telas baixas
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if (!mounted)
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return (
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<div
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className="ds-reel ds-reel-placeholder"
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aria-hidden="true"
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style={{ "--reel-sum": weightSum } as CSSProperties}
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/>
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);
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const current = items[active];
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return (
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<section
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className="ds-reel"
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aria-label="Vitrine animada dos projetos"
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style={{ "--reel-sum": weightSum } as CSSProperties}
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ref={containerRef}
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>
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<div className="ds-reel-pin" ref={pinRef}>
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<div className="ds-reel-grid">
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<nav className="ds-reel-index" aria-label="Projetos da vitrine">
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<p className="ds-reel-hint">
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<span aria-hidden="true" className="ds-reel-hint-line" />
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Em movimento
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<span className="ds-reel-hint-sub">Role para avançar</span>
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</p>
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<ol ref={indexRef}>
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{items.map((item, index) => (
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<li key={item.config.id}>
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<button
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type="button"
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aria-current={index === active ? "true" : undefined}
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aria-label={item.project.title}
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onClick={() => goTo(index)}
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>
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<span className="ds-reel-num">
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{String(index + 1).padStart(2, "0")}
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</span>
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<span className="ds-reel-name">{item.project.title}</span>
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<i
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className="ds-reel-bar"
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aria-hidden="true"
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ref={(element) => {
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bars.current[index] = element;
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}}
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/>
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</button>
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{index === active && (
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<ol
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className="ds-reel-chapters"
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aria-label={`Trechos de ${item.project.title}`}
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>
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{item.config.chapters.map((entry, i) => (
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<li key={entry.label}>
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<button
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type="button"
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aria-current={i === chapter ? "true" : undefined}
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onClick={() => goToChapter(index, i)}
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>
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<span aria-hidden="true">
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{String(i + 1).padStart(2, "0")}
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</span>
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{entry.label}
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</button>
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</li>
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))}
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</ol>
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)}
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</li>
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))}
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</ol>
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</nav>
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<div className="ds-reel-stage">
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{items.map((item, index) => {
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const { config, project } = item;
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const isActive = index === active;
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const attach = isAttached(index);
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const desktop = getShowcaseAssets(config.id, "desktop");
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const phone = getShowcaseAssets(config.id, "mobile");
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return (
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<div
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key={config.id}
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className="ds-reel-layer"
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data-state={
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isActive ? "active" : index < active ? "before" : "after"
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}
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style={{ "--accent": config.accent } as CSSProperties}
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aria-hidden={isActive ? undefined : true}
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inert={!isActive}
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>
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<div className="ds-reel-set">
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<div className="ds-reel-devices">
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<BrowserFrame
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url={displayUrl(project)}
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className="ds-reel-laptop"
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>
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<div
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className="ds-reel-screen"
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style={{ backgroundImage: `url(${desktop.poster})` }}
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>
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{/* biome-ignore lint/a11y/useMediaCaption: vídeo decorativo sem áudio */}
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<video
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ref={(element) => {
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desktopVideos.current[index] = element;
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}}
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src={
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attach && !phoneOnly
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? getScrubSource(config.id, "desktop")
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: undefined
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}
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poster={desktop.poster}
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muted
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playsInline
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preload={attach && !phoneOnly ? "auto" : "none"}
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tabIndex={-1}
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aria-hidden="true"
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disablePictureInPicture
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disableRemotePlayback
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onLoadedMetadata={() => syncVideos(index)}
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onLoadedData={(event) => prime(event.currentTarget)}
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/>
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</div>
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</BrowserFrame>
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<PhoneFrame
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className="ds-reel-phone"
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poster={phone.poster}
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>
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{/* biome-ignore lint/a11y/useMediaCaption: vídeo decorativo sem áudio */}
|
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<video
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ref={(element) => {
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phoneVideos.current[index] = element;
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}}
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src={
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attach
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? getScrubSource(config.id, "mobile")
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: undefined
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}
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poster={phone.poster}
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muted
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playsInline
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preload={attach ? "auto" : "none"}
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tabIndex={-1}
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aria-hidden="true"
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disablePictureInPicture
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disableRemotePlayback
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onLoadedMetadata={() => syncVideos(index)}
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onLoadedData={(event) => prime(event.currentTarget)}
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|
/>
|
|
</PhoneFrame>
|
|
</div>
|
|
|
|
<div className="ds-reel-caption">
|
|
<p className="ds-kicker">
|
|
{project.category} · {project.status}
|
|
</p>
|
|
<h3 className="ds-reel-title">{project.title}</h3>
|
|
{project.subtitle && (
|
|
<p className="ds-reel-sub">{project.subtitle}</p>
|
|
)}
|
|
<div className="ds-reel-chapter">
|
|
<span className="ds-reel-chapter-count">
|
|
{String((isActive ? chapter : 0) + 1).padStart(
|
|
2,
|
|
"0",
|
|
)}
|
|
/{String(config.chapters.length).padStart(2, "0")}
|
|
</span>
|
|
<strong>
|
|
{config.chapters[isActive ? chapter : 0].label}
|
|
</strong>
|
|
<ol className="ds-reel-ticks" aria-hidden="true">
|
|
{config.chapters.map((entry, tick) => (
|
|
<li
|
|
key={entry.label}
|
|
data-state={
|
|
!isActive || tick > chapter
|
|
? "todo"
|
|
: tick === chapter
|
|
? "now"
|
|
: "done"
|
|
}
|
|
/>
|
|
))}
|
|
</ol>
|
|
</div>
|
|
<div className="ds-reel-actions">
|
|
<button
|
|
type="button"
|
|
className="ds-link ds-link-accent"
|
|
onClick={() => openProject(config.id)}
|
|
aria-haspopup="dialog"
|
|
>
|
|
Ampliar vídeo
|
|
</button>
|
|
{project.demoUrl &&
|
|
project.demoAvailability !== "unavailable" && (
|
|
<a
|
|
className="ds-link ds-link-muted"
|
|
href={project.demoUrl}
|
|
target="_blank"
|
|
rel="noreferrer"
|
|
>
|
|
Abrir projeto
|
|
<span className="sr-only">
|
|
{" "}
|
|
(abre em nova aba)
|
|
</span>
|
|
</a>
|
|
)}
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
);
|
|
})}
|
|
</div>
|
|
</div>
|
|
<p className="sr-only" aria-live="polite">
|
|
{current
|
|
? `${current.project.title}: ${current.config.chapters[chapter]?.label ?? ""}`
|
|
: ""}
|
|
</p>
|
|
</div>
|
|
</section>
|
|
);
|
|
}
|