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Monorepo for Tangled tangled.org
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5.3 kB · 142 lines
Astro
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143---// starlight's search, with each result's excerpt cut down to a little context// before its first match, so the match survives the one-line clamp in tangled.css.// excerpts that start or stop mid-sentence are marked so the stylesheet can add// an ellipsis at that end. results show a page of cards at a time, the last// one faded, and scrolling it into view shows the next page, asking pagefind// for more once the shown cards run low. the arrow keys move through the results// while focus stays in the input, and enter opens the active one. each card's// title is prefixed with its page's title, unless the card is the page itselfimport Default from "@astrojs/starlight/components/Search.astro";---
<Default />
<script> const context = 32; const pageSize = 7; const seen = new WeakSet<Text>(); const cut = new WeakSet<Text>();
const trim = (excerpt: Element) => { const lead = excerpt.firstChild; if (lead instanceof Text && lead.nextSibling && !seen.has(lead)) { seen.add(lead); if (lead.data.length > context) { const tail = lead.data.slice(-context); lead.data = tail.slice(tail.indexOf(" ") + 1); cut.add(lead); } } const text = excerpt.textContent?.trim() ?? ""; const startsMidSentence = /^\p{Ll}/u.test(text); excerpt.toggleAttribute("data-clipped", (lead instanceof Text && cut.has(lead)) || startsMidSentence); excerpt.toggleAttribute("data-trails", !/[.!?:]$/.test(text)); };
const results = document.querySelector<HTMLElement>("#starlight__search"); if (results) { let active: Element | undefined; let chosen = false; let limit = pageSize; const allCards = () => results.querySelectorAll(".pagefind-ui__result-nested"); const cards = () => [...results.querySelectorAll(".pagefind-ui__result-nested:not([data-overflow])")]; const pagefindMore = () => results.querySelector<HTMLButtonElement>(".pagefind-ui__button");
const frame = results.closest(".dialog-frame"); let pending = false; let count = 0; let watched: Element | undefined;
const loadMore = () => { const all = allCards().length; if (all > limit) limit += pageSize; const button = pagefindMore(); if (button && !pending && all < limit + pageSize) { pending = true; button.click(); } paginate(); };
const watcher = new IntersectionObserver((entries) => entries.some((e) => e.isIntersecting) && loadMore(), { root: frame, rootMargin: "0px 0px 120px 0px", });
const paginate = () => { const all = allCards(); all.forEach((card, i) => { card.toggleAttribute("data-overflow", i >= limit); card.removeAttribute("data-faded"); }); const last = all.length > limit || pagefindMore() ? all[Math.min(limit, all.length) - 1] : undefined; last?.setAttribute("data-faded", ""); if (last !== watched) { watcher.disconnect(); watched = last; if (last) watcher.observe(last); } };
const activate = (card: Element | undefined, scroll = false) => { active?.removeAttribute("data-active"); active = card; active?.setAttribute("data-active", ""); if (scroll) active?.scrollIntoView({ block: "nearest" }); };
const label = () => { results.querySelectorAll(".pagefind-ui__result").forEach((result) => { const page = result.querySelector(".pagefind-ui__result-inner > .pagefind-ui__result-title")?.textContent?.trim(); result.querySelectorAll(".pagefind-ui__result-nested .pagefind-ui__result-link").forEach((link) => { const own = link.textContent?.trim(); if (page && own && own !== page) link.setAttribute("data-page", page); else link.removeAttribute("data-page"); }); }); };
new MutationObserver(() => { if (allCards().length !== count) { count = allCards().length; pending = false; } paginate(); label(); results.querySelectorAll(".pagefind-ui__result-excerpt").forEach(trim); if (!chosen || !active?.isConnected) activate(cards()[0]); }).observe(results, { childList: true, subtree: true });
results.addEventListener("input", () => { chosen = false; pending = false; limit = pageSize; activate(undefined); });
results.addEventListener("pointermove", (e) => { const card = (e.target as Element).closest(".pagefind-ui__result-nested"); if (card && card !== active) { chosen = true; activate(card); } });
results.addEventListener("keydown", (e) => { if (!(e.target instanceof HTMLInputElement)) return; if (e.key === "ArrowDown" || e.key === "ArrowUp") { const all = cards(); if (!all.length) return; e.preventDefault(); chosen = true; const i = active ? all.indexOf(active) : -1; const next = e.key === "ArrowDown" ? Math.min(i + 1, all.length - 1) : Math.max(i - 1, 0); activate(all[next], true); } else if (e.key === "Enter" && !e.isComposing && active) { e.preventDefault(); active.querySelector<HTMLAnchorElement>("a")?.click(); } }); }</script>