diff --git a/static/player/episodes/ui.ts b/static/player/episodes/ui.ts index 46e920e2..bd97880f 100644 --- a/static/player/episodes/ui.ts +++ b/static/player/episodes/ui.ts @@ -36,21 +36,53 @@ const getEpisodeEls = () => { }; }; -/** Highlights current episode in grid and list. Scrolls to episode into view. */ -export const updateEpisodeHighlight = (num: number): void => { +/** Highlights current episode in grid and list. */ +export const updateEpisodeHighlight = (num: number, restoreFocus: boolean = false): void => { const { gridEls, listEls } = getEpisodeEls(); // clear old highlights [...gridEls, ...listEls].forEach((el) => { - el.classList.remove("ring-2", "ring-accent", "bg-accent/20", "text-accent"); + el.classList.remove("ring-1", "ring-accent", "bg-accent/15", "bg-accent/20", "text-accent"); + el.removeAttribute("aria-current"); }); // apply new highlight const gridEl = state.elements.episodeGrid?.querySelector(`[data-episode-id="${num}"]`); const listEl = state.elements.episodeList?.querySelector(`[data-episode-id="${num}"]`); - gridEl?.classList.add("ring-2", "ring-accent"); - listEl?.classList.add("ring-2", "ring-accent"); + gridEl?.classList.add("bg-accent/15", "text-accent", "ring-1", "ring-accent"); + listEl?.classList.add("bg-accent/20"); + gridEl?.setAttribute("aria-current", "page"); + listEl?.setAttribute("aria-current", "page"); // scroll into view - (gridEl ?? listEl)?.scrollIntoView({ behavior: "smooth", block: "center" }); + const activeElement = gridEl ?? listEl; + activeElement?.scrollIntoView({ behavior: "smooth", block: "center" }); + if (restoreFocus && activeElement instanceof HTMLElement) { + activeElement.focus({ preventScroll: true }); + } +}; + +const setNavigationLink = (selector: string, episode: number, visible: boolean): void => { + const anchor = document.querySelector(selector) as HTMLAnchorElement | null; + if (!anchor) { + return; + } + const url = new URL(anchor.href, window.location.href); + url.searchParams.set("ep", String(episode)); + anchor.href = url.toString(); + anchor.dataset.episodeId = String(episode); + anchor.classList.toggle("hidden", !visible); + anchor.classList.toggle("inline-flex", visible); + anchor.setAttribute("aria-hidden", visible ? "false" : "true"); + anchor.tabIndex = visible ? 0 : -1; +}; + +/** Keeps the real Previous and Next links correct after an in-page transition. */ +export const updateEpisodeNavigation = (episode: number): void => { + setNavigationLink("[data-episode-prev]", Math.max(1, episode - 1), episode > 1); + setNavigationLink( + "[data-episode-next]", + state.episode.total > 0 ? Math.min(state.episode.total, episode + 1) : episode + 1, + state.episode.total === 0 || episode < state.episode.total, + ); }; /** Switches visible episode range in grid. Updates dropdown label and hides/shows episode cards. */