Evandro Fonseca Junior
6ac87824f3
Legenda do mergulho até Projetos cobrir a cena; transição de página sem blur e com fundo escuro; foco no conteúdo ao trocar de página; listas com marcador e dois pesos de título; vídeos da SEV e da SC Plus regravados sem quadros brancos; scrub a 12-15 fps (-30%); vitrine com uma parada de Tab e setas, contador no celular e CSS sob demanda; âncoras num módulo só (fragment-nav); FramePulse com setInterval; CSS morto removido.
400 lines
13 KiB
TypeScript
400 lines
13 KiB
TypeScript
"use client";
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import Link from "next/link";
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import {
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type ChangeEvent,
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type CSSProperties,
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type KeyboardEvent,
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type MouseEvent,
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type PointerEvent,
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useCallback,
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useEffect,
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useId,
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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 { isMobileViewport, isSaveData } from "@/lib/device";
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import {
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chapterFraction,
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chapterIndexAt,
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type Device,
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desktopFractionAt,
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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 type { ShowcaseItem } from "./ShowcaseProvider";
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import "./lightbox.css";
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const formatTime = (seconds: number) => {
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const whole = Math.max(0, Math.floor(seconds));
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return `${Math.floor(whole / 60)}:${String(whole % 60).padStart(2, "0")}`;
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};
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/**
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* Vídeo ampliado: janela modal nativa (<dialog>: foco preso, Esc fecha, foco volta ao botão que abriu),
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* com troca desktop/celular que mantém o ponto do site, capítulos clicáveis e controles próprios.
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*/
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export function ProjectLightbox({
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items,
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index,
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onClose,
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onNavigate,
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}: {
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items: ShowcaseItem[];
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index: number;
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onClose: () => void;
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onNavigate: (index: number) => void;
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}) {
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const { config, project } = items[index];
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const reducedMotion = useReducedMotion();
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const titleId = useId();
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const dialogRef = useRef<HTMLDialogElement>(null);
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const videoRef = useRef<HTMLVideoElement>(null);
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const closeRef = useRef<HTMLButtonElement>(null);
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const previousRef = useRef<HTMLButtonElement>(null);
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const nextRef = useRef<HTMLButtonElement>(null);
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const pendingFraction = useRef<number | null>(null);
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const pressedOnBackdrop = useRef(false);
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// celular abaixo de 768 px (lib/device.ts); a troca de aparelho continua à escolha do visitante
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const [device, setDevice] = useState<Device>(() =>
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isMobileViewport() ? "mobile" : "desktop",
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);
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// o vídeo de cada aparelho/projeto nasce tocando só se o visitante não pausou e não pediu menos movimento
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// "economizar dados": o arquivo só chega quando o visitante pede (play), não antes
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const [saveData] = useState(isSaveData);
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const [autoplay, setAutoplay] = useState(
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() =>
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!window.matchMedia("(prefers-reduced-motion: reduce)").matches &&
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!saveData,
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);
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const wantsToPlay = useRef(autoplay);
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const [playing, setPlaying] = useState(false);
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const [fraction, setFraction] = useState(0);
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const [duration, setDuration] = useState(0);
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useEffect(() => {
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if (!reducedMotion) return;
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wantsToPlay.current = false;
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setAutoplay(false);
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}, [reducedMotion]);
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useEffect(() => {
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const dialog = dialogRef.current;
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if (!dialog) return;
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if (!dialog.open) dialog.showModal();
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closeRef.current?.focus();
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// travar a rolagem da página tira a barra de rolagem clássica: o espaço dela é devolvido para nada pular
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const root = document.documentElement;
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root.style.setProperty(
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"--ds-scrollbar",
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`${Math.max(0, window.innerWidth - root.clientWidth)}px`,
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);
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root.classList.add("ds-lb-open");
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return () => {
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root.classList.remove("ds-lb-open");
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root.style.removeProperty("--ds-scrollbar");
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// sem dialog.close() aqui: no StrictMode do dev a limpeza roda no meio da abertura e o evento `close`
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// (assíncrono) chegaria depois de reaberto; sair do DOM já basta para soltar a janela modal
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};
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}, []);
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// o marcador acompanha o vídeo quadro a quadro enquanto ele toca (timeupdate só chega umas 4 vezes por segundo)
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useEffect(() => {
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if (!playing) return;
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let id = 0;
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const tick = () => {
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const current = videoRef.current;
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if (current?.duration)
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setFraction(current.currentTime / current.duration);
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id = requestAnimationFrame(tick);
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};
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id = requestAnimationFrame(tick);
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return () => cancelAnimationFrame(id);
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}, [playing]);
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const assets = getShowcaseAssets(config.id, device);
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const desktopFraction =
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device === "desktop" ? fraction : desktopFractionAt(config, fraction);
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const chapter = chapterIndexAt(config, desktopFraction);
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const url = displayUrl(project);
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const canOpenSite =
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project.demoUrl &&
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(project.demoAvailability === "available" ||
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project.demoAvailability === "unknown");
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const switchDevice = (next: Device) => {
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if (next === device) return;
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const video = videoRef.current;
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// se o novo vídeo ainda não tem duração (duplo clique), vale a posição já gravada no estado
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const current = video?.duration
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? video.currentTime / video.duration
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: fraction;
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pendingFraction.current =
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next === "mobile"
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? mobileFractionAt(config, current)
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: desktopFractionAt(config, current);
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setFraction(pendingFraction.current);
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setPlaying(false);
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setAutoplay(wantsToPlay.current);
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setDevice(next);
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};
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const navigate = (next: number) => {
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if (next < 0 || next >= items.length) return;
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pendingFraction.current = null;
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setFraction(0);
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setPlaying(false);
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setAutoplay(wantsToPlay.current);
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// o botão que acabou de chegar ao limite fica desabilitado: o foco passa para o do outro lado
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const active = document.activeElement;
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if (active === previousRef.current && next === 0) nextRef.current?.focus();
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if (active === nextRef.current && next === items.length - 1)
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previousRef.current?.focus();
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onNavigate(next);
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};
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const handleMetadata = () => {
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const video = videoRef.current;
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if (!video) return;
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setDuration(video.duration);
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if (pendingFraction.current !== null) {
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video.currentTime = pendingFraction.current * video.duration;
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pendingFraction.current = null;
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}
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};
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const handleTime = () => {
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const video = videoRef.current;
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if (video?.duration) setFraction(video.currentTime / video.duration);
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};
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const togglePlay = () => {
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const video = videoRef.current;
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if (!video) return;
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wantsToPlay.current = video.paused;
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if (video.paused) video.play().catch(() => {});
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else video.pause();
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};
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const seekTo = useCallback((next: number) => {
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const video = videoRef.current;
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if (!video?.duration) return;
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video.currentTime = Math.min(1, Math.max(0, next)) * video.duration;
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setFraction(next);
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}, []);
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const onKeyDown = (event: KeyboardEvent<HTMLDialogElement>) => {
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if (event.target instanceof HTMLInputElement) return;
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// Alt+Seta é "voltar/avançar" do navegador
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if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey)
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return;
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if (event.key === "ArrowLeft") navigate(index - 1);
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if (event.key === "ArrowRight") navigate(index + 1);
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};
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// clique no fundo escuro fecha, mas só se o toque também começou nele (arrastar a barra de posição e soltar fora não conta)
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const onBackdropPointerDown = (event: PointerEvent<HTMLDialogElement>) => {
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pressedOnBackdrop.current = event.target === event.currentTarget;
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};
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const onBackdropClick = (event: MouseEvent<HTMLDialogElement>) => {
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if (event.target === event.currentTarget && pressedOnBackdrop.current)
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dialogRef.current?.close();
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pressedOnBackdrop.current = false;
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};
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const video = (
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<video
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key={`${config.id}-${device}`}
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ref={videoRef}
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className="ds-lb-video"
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autoPlay={autoplay}
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muted
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loop
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playsInline
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preload={saveData ? "metadata" : "auto"}
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poster={assets.poster}
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width={assets.width}
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height={assets.height}
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onLoadedMetadata={handleMetadata}
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onPlay={() => setPlaying(true)}
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onPause={() => setPlaying(false)}
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onTimeUpdate={handleTime}
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aria-label={`Vídeo de ${project.title}, versão ${device === "desktop" ? "para computador" : "para celular"}`}
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>
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{assets.sources.map((source) => (
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<source key={source.src} src={source.src} type={source.type} />
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))}
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</video>
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);
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return (
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<dialog
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ref={dialogRef}
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className="ds-lb"
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aria-labelledby={titleId}
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data-lenis-prevent
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style={{ "--accent": config.accent } as CSSProperties}
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onClose={(event) => {
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// um `close` atrasado de uma janela que já foi reaberta (StrictMode) não pode fechar a nova
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if (!event.currentTarget.open) onClose();
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}}
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onPointerDown={onBackdropPointerDown}
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onClick={onBackdropClick}
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onKeyDown={onKeyDown}
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>
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<div className="ds-lb-panel">
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<p className="sr-only" aria-live="polite">
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{`${project.title}, projeto ${index + 1} de ${items.length}`}
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</p>
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<header className="ds-lb-head">
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<div className="ds-lb-heading">
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<p className="ds-lb-count">
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{String(index + 1).padStart(2, "0")} /{" "}
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{String(items.length).padStart(2, "0")}
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</p>
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<h2 id={titleId} className="ds-lb-title">
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{project.title}
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</h2>
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</div>
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<fieldset className="ds-lb-toggle">
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<legend className="sr-only">Versão do site</legend>
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{(["desktop", "mobile"] as const).map((option) => (
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<button
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key={option}
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type="button"
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aria-pressed={device === option}
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onClick={() => switchDevice(option)}
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>
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{option === "desktop" ? "Computador" : "Celular"}
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</button>
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))}
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</fieldset>
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<div className="ds-lb-nav">
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<button
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ref={previousRef}
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type="button"
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onClick={() => navigate(index - 1)}
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disabled={index === 0}
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aria-label="Projeto anterior"
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>
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<svg viewBox="0 0 16 16" aria-hidden="true">
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<path d="M10 3 5 8l5 5" />
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</svg>
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</button>
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<button
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ref={nextRef}
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type="button"
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onClick={() => navigate(index + 1)}
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disabled={index === items.length - 1}
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aria-label="Próximo projeto"
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>
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<svg viewBox="0 0 16 16" aria-hidden="true">
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<path d="m6 3 5 5-5 5" />
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</svg>
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</button>
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<button
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ref={closeRef}
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type="button"
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onClick={() => dialogRef.current?.close()}
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aria-label="Fechar"
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>
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<svg viewBox="0 0 16 16" aria-hidden="true">
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<path d="m3 3 10 10M13 3 3 13" />
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</svg>
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</button>
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</div>
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</header>
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<div className="ds-lb-stage" data-device={device}>
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{device === "desktop" ? (
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<BrowserFrame url={url} className="ds-lb-frame">
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<div
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className="ds-lb-screen"
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style={{ backgroundImage: `url(${assets.poster})` }}
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>
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{video}
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</div>
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</BrowserFrame>
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) : (
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<PhoneFrame className="ds-lb-phone" poster={assets.poster}>
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{video}
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</PhoneFrame>
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)}
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</div>
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<div className="ds-lb-controls">
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<button
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type="button"
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className="ds-lb-play"
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onClick={togglePlay}
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aria-label={playing ? "Pausar" : "Reproduzir"}
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>
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<svg viewBox="0 0 16 16" aria-hidden="true">
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{playing ? (
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<path d="M4 3h3v10H4zM9 3h3v10H9z" />
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) : (
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<path d="M4 2.5v11l9-5.5z" />
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)}
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</svg>
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</button>
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<span className="ds-lb-time" aria-hidden="true">
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{formatTime(fraction * duration)} / {formatTime(duration)}
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</span>
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<input
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type="range"
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className="ds-lb-range"
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min={0}
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max={1000}
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step={1}
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value={Math.round(fraction * 1000)}
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onChange={(event: ChangeEvent<HTMLInputElement>) =>
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seekTo(Number(event.target.value) / 1000)
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}
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aria-label="Posição do vídeo"
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aria-valuetext={`${formatTime(fraction * duration)} de ${formatTime(duration)}`}
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/>
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</div>
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<ol className="ds-lb-chapters" aria-label="Trechos do site">
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{config.chapters.map((entry, i) => (
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<li key={entry.label}>
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<button
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type="button"
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aria-current={i === chapter ? "true" : undefined}
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onClick={() => seekTo(chapterFraction(config, i, device))}
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>
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<span aria-hidden="true">{String(i + 1).padStart(2, "0")}</span>{" "}
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{entry.label}
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</button>
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</li>
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))}
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</ol>
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<div className="ds-lb-links">
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<Link className="ds-link ds-link-muted" href={`/cases/${project.id}`}>
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Ver case
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<span className="sr-only"> de {project.title}</span>
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</Link>
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{canOpenSite && (
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<a
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className="ds-link ds-link-text"
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href={project.demoUrl ?? undefined}
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target="_blank"
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rel="noopener noreferrer"
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>
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Abrir site
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<span className="sr-only"> (abre em nova aba)</span>
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</a>
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)}
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</div>
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</div>
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</dialog>
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);
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}
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