| | |
| | | import { Document, SimpleDocumentSearchResultSetUnit } from "flexsearch" |
| | | import FlexSearch from "flexsearch" |
| | | import { ContentDetails } from "../../plugins/emitters/contentIndex" |
| | | import { registerEscapeHandler, removeAllChildren } from "./util" |
| | | import { FullSlug, resolveRelative } from "../../util/path" |
| | | import { FullSlug, normalizeRelativeURLs, resolveRelative } from "../../util/path" |
| | | |
| | | interface Item { |
| | | id: number |
| | |
| | | tags: string[] |
| | | } |
| | | |
| | | let index: Document<Item> | undefined = undefined |
| | | |
| | | // Can be expanded with things like "term" in the future |
| | | type SearchType = "basic" | "tags" |
| | | |
| | | // Current searchType |
| | | let searchType: SearchType = "basic" |
| | | let currentSearchTerm: string = "" |
| | | let index: FlexSearch.Document<Item> | undefined = undefined |
| | | const p = new DOMParser() |
| | | const encoder = (str: string) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])/) |
| | | |
| | | const fetchContentCache: Map<FullSlug, Element[]> = new Map() |
| | | const contextWindowWords = 30 |
| | | const numSearchResults = 5 |
| | | const numTagResults = 3 |
| | | function highlight(searchTerm: string, text: string, trim?: boolean) { |
| | | // try to highlight longest tokens first |
| | | const tokenizedTerms = searchTerm |
| | | const numSearchResults = 8 |
| | | const numTagResults = 5 |
| | | |
| | | const tokenizeTerm = (term: string) => |
| | | term |
| | | .split(/\s+/) |
| | | .filter((t) => t !== "") |
| | | .sort((a, b) => b.length - a.length) |
| | | |
| | | function highlight(searchTerm: string, text: string, trim?: boolean) { |
| | | // try to highlight longest tokens first |
| | | const tokenizedTerms = tokenizeTerm(searchTerm) |
| | | let tokenizedText = text.split(/\s+/).filter((t) => t !== "") |
| | | |
| | | let startIndex = 0 |
| | |
| | | } |
| | | return tok |
| | | }) |
| | | .slice(startIndex, endIndex + 1) |
| | | .join(" ") |
| | | |
| | | return `${startIndex === 0 ? "" : "..."}${slice}${ |
| | |
| | | }` |
| | | } |
| | | |
| | | const encoder = (str: string) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])/) |
| | | let prevShortcutHandler: ((e: HTMLElementEventMap["keydown"]) => void) | undefined = undefined |
| | | document.addEventListener("nav", async (e: unknown) => { |
| | | const currentSlug = (e as CustomEventMap["nav"]).detail.url |
| | | function highlightHTML(searchTerm: string, el: HTMLElement) { |
| | | const p = new DOMParser() |
| | | const tokenizedTerms = tokenizeTerm(searchTerm) |
| | | const html = p.parseFromString(el.innerHTML, "text/html") |
| | | |
| | | const createHighlightSpan = (text: string) => { |
| | | const span = document.createElement("span") |
| | | span.className = "highlight" |
| | | span.textContent = text |
| | | return span |
| | | } |
| | | |
| | | const highlightTextNodes = (node: Node) => { |
| | | if (node.nodeType === Node.TEXT_NODE) { |
| | | let nodeText = node.nodeValue || "" |
| | | tokenizedTerms.forEach((term) => { |
| | | const regex = new RegExp(term.toLowerCase(), "gi") |
| | | const matches = nodeText.match(regex) |
| | | const spanContainer = document.createElement("span") |
| | | let lastIndex = 0 |
| | | matches?.forEach((match) => { |
| | | const matchIndex = nodeText.indexOf(match, lastIndex) |
| | | spanContainer.appendChild(document.createTextNode(nodeText.slice(lastIndex, matchIndex))) |
| | | spanContainer.appendChild(createHighlightSpan(match)) |
| | | lastIndex = matchIndex + match.length |
| | | }) |
| | | spanContainer.appendChild(document.createTextNode(nodeText.slice(lastIndex))) |
| | | node.parentNode?.replaceChild(spanContainer, node) |
| | | }) |
| | | } else if (node.nodeType === Node.ELEMENT_NODE) { |
| | | Array.from(node.childNodes).forEach(highlightTextNodes) |
| | | } |
| | | } |
| | | |
| | | highlightTextNodes(html.body) |
| | | return html.body |
| | | } |
| | | |
| | | document.addEventListener("nav", async (e: CustomEventMap["nav"]) => { |
| | | const currentSlug = e.detail.url |
| | | |
| | | const data = await fetchData |
| | | const container = document.getElementById("search-container") |
| | | const sidebar = container?.closest(".sidebar") as HTMLElement |
| | | const searchIcon = document.getElementById("search-icon") |
| | | const searchBar = document.getElementById("search-bar") as HTMLInputElement | null |
| | | const results = document.getElementById("results-container") |
| | | const resultCards = document.getElementsByClassName("result-card") |
| | | const searchLayout = document.getElementById("search-layout") |
| | | const idDataMap = Object.keys(data) as FullSlug[] |
| | | |
| | | const appendLayout = (el: HTMLElement) => { |
| | | if (searchLayout?.querySelector(`#${el.id}`) === null) { |
| | | searchLayout?.appendChild(el) |
| | | } |
| | | } |
| | | |
| | | const enablePreview = searchLayout?.dataset?.preview === "true" |
| | | let preview: HTMLDivElement | undefined = undefined |
| | | let previewInner: HTMLDivElement | undefined = undefined |
| | | const results = document.createElement("div") |
| | | results.id = "results-container" |
| | | results.style.flexBasis = enablePreview ? "30%" : "100%" |
| | | appendLayout(results) |
| | | |
| | | if (enablePreview) { |
| | | preview = document.createElement("div") |
| | | preview.id = "preview-container" |
| | | preview.style.flexBasis = "70%" |
| | | appendLayout(preview) |
| | | } |
| | | |
| | | function hideSearch() { |
| | | container?.classList.remove("active") |
| | | if (searchBar) { |
| | |
| | | if (results) { |
| | | removeAllChildren(results) |
| | | } |
| | | if (preview) { |
| | | removeAllChildren(preview) |
| | | } |
| | | if (searchLayout) { |
| | | searchLayout.style.opacity = "0" |
| | | } |
| | | |
| | | searchType = "basic" // reset search type after closing |
| | | } |
| | |
| | | searchBar?.focus() |
| | | } |
| | | |
| | | function shortcutHandler(e: HTMLElementEventMap["keydown"]) { |
| | | if (!container?.classList.contains("active")) return |
| | | let currentHover: HTMLInputElement | null = null |
| | | |
| | | async function shortcutHandler(e: HTMLElementEventMap["keydown"]) { |
| | | if (e.key === "k" && (e.ctrlKey || e.metaKey) && !e.shiftKey) { |
| | | e.preventDefault() |
| | | const searchBarOpen = container?.classList.contains("active") |
| | |
| | | |
| | | // add "#" prefix for tag search |
| | | if (searchBar) searchBar.value = "#" |
| | | } else if (e.key === "Enter") { |
| | | } |
| | | |
| | | if (currentHover) { |
| | | currentHover.classList.remove("focus") |
| | | } |
| | | |
| | | // If search is active, then we will render the first result and display accordingly |
| | | if (!container?.classList.contains("active")) return |
| | | else if (e.key === "Enter") { |
| | | // If result has focus, navigate to that one, otherwise pick first result |
| | | if (results?.contains(document.activeElement)) { |
| | | const active = document.activeElement as HTMLInputElement |
| | | if (active.classList.contains("no-match")) return |
| | | await displayPreview(active) |
| | | active.click() |
| | | } else { |
| | | const anchor = document.getElementsByClassName("result-card")[0] as HTMLInputElement | null |
| | | anchor?.click() |
| | | if (!anchor || anchor?.classList.contains("no-match")) return |
| | | await displayPreview(anchor) |
| | | anchor.click() |
| | | } |
| | | } else if (e.key === "ArrowDown") { |
| | | e.preventDefault() |
| | | // When first pressing ArrowDown, results wont contain the active element, so focus first element |
| | | if (!results?.contains(document.activeElement)) { |
| | | const firstResult = resultCards[0] as HTMLInputElement | null |
| | | firstResult?.focus() |
| | | } else { |
| | | // If an element in results-container already has focus, focus next one |
| | | const nextResult = document.activeElement?.nextElementSibling as HTMLInputElement | null |
| | | nextResult?.focus() |
| | | } |
| | | } else if (e.key === "ArrowUp") { |
| | | } else if (e.key === "ArrowUp" || (e.shiftKey && e.key === "Tab")) { |
| | | e.preventDefault() |
| | | if (results?.contains(document.activeElement)) { |
| | | // If an element in results-container already has focus, focus previous one |
| | | const prevResult = document.activeElement?.previousElementSibling as HTMLInputElement | null |
| | | const currentResult = currentHover |
| | | ? currentHover |
| | | : (document.activeElement as HTMLInputElement | null) |
| | | const prevResult = currentResult?.previousElementSibling as HTMLInputElement | null |
| | | currentResult?.classList.remove("focus") |
| | | await displayPreview(prevResult) |
| | | prevResult?.focus() |
| | | currentHover = prevResult |
| | | } |
| | | } else if (e.key === "ArrowDown" || e.key === "Tab") { |
| | | e.preventDefault() |
| | | // The results should already been focused, so we need to find the next one. |
| | | // The activeElement is the search bar, so we need to find the first result and focus it. |
| | | if (document.activeElement === searchBar || currentHover !== null) { |
| | | const firstResult = currentHover |
| | | ? currentHover |
| | | : (document.getElementsByClassName("result-card")[0] as HTMLInputElement | null) |
| | | const secondResult = firstResult?.nextElementSibling as HTMLInputElement | null |
| | | firstResult?.classList.remove("focus") |
| | | await displayPreview(secondResult) |
| | | secondResult?.focus() |
| | | currentHover = secondResult |
| | | } else { |
| | | // If an element in results-container already has focus, focus next one |
| | | const active = currentHover |
| | | ? currentHover |
| | | : (document.activeElement as HTMLInputElement | null) |
| | | active?.classList.remove("focus") |
| | | const nextResult = active?.nextElementSibling as HTMLInputElement | null |
| | | await displayPreview(nextResult) |
| | | nextResult?.focus() |
| | | currentHover = nextResult |
| | | } |
| | | } |
| | | } |
| | |
| | | } |
| | | } |
| | | |
| | | const resultToHTML = ({ slug, title, content, tags }: Item) => { |
| | | const htmlTags = tags.length > 0 ? `<ul>${tags.join("")}</ul>` : `` |
| | | const button = document.createElement("button") |
| | | button.classList.add("result-card") |
| | | button.id = slug |
| | | button.innerHTML = `<h3>${title}</h3>${htmlTags}<p>${content}</p>` |
| | | button.addEventListener("click", () => { |
| | | const targ = resolveRelative(currentSlug, slug) |
| | | window.spaNavigate(new URL(targ, window.location.toString())) |
| | | hideSearch() |
| | | }) |
| | | return button |
| | | function resolveUrl(slug: FullSlug): URL { |
| | | return new URL(resolveRelative(currentSlug, slug), location.toString()) |
| | | } |
| | | |
| | | function displayResults(finalResults: Item[]) { |
| | | const resultToHTML = ({ slug, title, content, tags }: Item) => { |
| | | const htmlTags = tags.length > 0 ? `<ul>${tags.join("")}</ul>` : `` |
| | | const resultContent = enablePreview && window.innerWidth > 600 ? "" : `<p>${content}</p>` |
| | | |
| | | const itemTile = document.createElement("a") |
| | | itemTile.classList.add("result-card") |
| | | Object.assign(itemTile, { |
| | | id: slug, |
| | | href: resolveUrl(slug).toString(), |
| | | innerHTML: `<h3>${title}</h3>${htmlTags}${resultContent}`, |
| | | }) |
| | | |
| | | async function onMouseEnter(ev: MouseEvent) { |
| | | // Actually when we hover, we need to clean all highlights within the result childs |
| | | if (!ev.target) return |
| | | for (const el of document.getElementsByClassName( |
| | | "result-card", |
| | | ) as HTMLCollectionOf<HTMLElement>) { |
| | | el.classList.remove("focus") |
| | | el.blur() |
| | | } |
| | | const target = ev.target as HTMLInputElement |
| | | await displayPreview(target) |
| | | currentHover = target |
| | | currentHover.classList.remove("focus") |
| | | } |
| | | |
| | | async function onMouseLeave(ev: MouseEvent) { |
| | | const target = ev.target as HTMLAnchorElement |
| | | target.classList.remove("focus") |
| | | } |
| | | |
| | | const events = [ |
| | | ["mouseenter", onMouseEnter], |
| | | ["mouseleave", onMouseLeave], |
| | | [ |
| | | "click", |
| | | (event: MouseEvent) => { |
| | | if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) return |
| | | hideSearch() |
| | | }, |
| | | ], |
| | | ] as [keyof HTMLElementEventMap, (this: HTMLElement) => void][] |
| | | |
| | | events.forEach(([event, handler]) => itemTile.addEventListener(event, handler)) |
| | | |
| | | return itemTile |
| | | } |
| | | |
| | | async function displayResults(finalResults: Item[]) { |
| | | if (!results) return |
| | | |
| | | removeAllChildren(results) |
| | | if (finalResults.length === 0) { |
| | | results.innerHTML = `<button class="result-card"> |
| | | results.innerHTML = `<a class="result-card no-match"> |
| | | <h3>No results.</h3> |
| | | <p>Try another search term?</p> |
| | | </button>` |
| | | </a>` |
| | | } else { |
| | | results.append(...finalResults.map(resultToHTML)) |
| | | } |
| | | // focus on first result, then also dispatch preview immediately |
| | | if (results?.firstElementChild) { |
| | | const firstChild = results.firstElementChild as HTMLElement |
| | | if (firstChild.classList.contains("no-match")) { |
| | | removeAllChildren(preview as HTMLElement) |
| | | } else { |
| | | firstChild.classList.add("focus") |
| | | currentHover = firstChild as HTMLInputElement |
| | | await displayPreview(firstChild) |
| | | } |
| | | } |
| | | } |
| | | |
| | | async function fetchContent(slug: FullSlug): Promise<Element[]> { |
| | | if (fetchContentCache.has(slug)) { |
| | | return fetchContentCache.get(slug) as Element[] |
| | | } |
| | | |
| | | const targetUrl = resolveUrl(slug).toString() |
| | | const contents = await fetch(targetUrl) |
| | | .then((res) => res.text()) |
| | | .then((contents) => { |
| | | if (contents === undefined) { |
| | | throw new Error(`Could not fetch ${targetUrl}`) |
| | | } |
| | | const html = p.parseFromString(contents ?? "", "text/html") |
| | | normalizeRelativeURLs(html, targetUrl) |
| | | return [...html.getElementsByClassName("popover-hint")] |
| | | }) |
| | | |
| | | fetchContentCache.set(slug, contents) |
| | | return contents |
| | | } |
| | | |
| | | async function displayPreview(el: HTMLElement | null) { |
| | | if (!searchLayout || !enablePreview || !el) return |
| | | |
| | | const slug = el.id as FullSlug |
| | | el.classList.add("focus") |
| | | |
| | | removeAllChildren(preview as HTMLElement) |
| | | |
| | | previewInner = document.createElement("div") |
| | | previewInner.classList.add("preview-inner") |
| | | preview?.appendChild(previewInner) |
| | | |
| | | const innerDiv = await fetchContent(slug).then((contents) => |
| | | contents.map((el) => highlightHTML(currentSearchTerm, el as HTMLElement)), |
| | | ) |
| | | previewInner.append(...innerDiv) |
| | | } |
| | | |
| | | async function onType(e: HTMLElementEventMap["input"]) { |
| | | let term = (e.target as HTMLInputElement).value |
| | | let searchResults: SimpleDocumentSearchResultSetUnit[] |
| | | let searchResults: FlexSearch.SimpleDocumentSearchResultSetUnit[] |
| | | currentSearchTerm = (e.target as HTMLInputElement).value |
| | | |
| | | if (searchLayout) { |
| | | searchLayout.style.opacity = "1" |
| | | } |
| | | |
| | | if (term === "" && searchLayout) { |
| | | searchLayout.style.opacity = "0" |
| | | } |
| | | |
| | | if (term.toLowerCase().startsWith("#")) { |
| | | searchType = "tags" |
| | |
| | | ...getByField("tags"), |
| | | ]) |
| | | const finalResults = [...allIds].map((id) => formatForDisplay(term, id)) |
| | | displayResults(finalResults) |
| | | } |
| | | |
| | | if (prevShortcutHandler) { |
| | | document.removeEventListener("keydown", prevShortcutHandler) |
| | | await displayResults(finalResults) |
| | | } |
| | | |
| | | document.addEventListener("keydown", shortcutHandler) |
| | | prevShortcutHandler = shortcutHandler |
| | | searchIcon?.removeEventListener("click", () => showSearch("basic")) |
| | | window.addCleanup(() => document.removeEventListener("keydown", shortcutHandler)) |
| | | searchIcon?.addEventListener("click", () => showSearch("basic")) |
| | | searchBar?.removeEventListener("input", onType) |
| | | window.addCleanup(() => searchIcon?.removeEventListener("click", () => showSearch("basic"))) |
| | | searchBar?.addEventListener("input", onType) |
| | | window.addCleanup(() => searchBar?.removeEventListener("input", onType)) |
| | | |
| | | // setup index if it hasn't been already |
| | | if (!index) { |
| | | index = new Document({ |
| | | index = new FlexSearch.Document({ |
| | | charset: "latin:extra", |
| | | optimize: true, |
| | | encode: encoder, |
| | | document: { |
| | | id: "id", |
| | | index: [ |
| | | { |
| | | field: "title", |
| | | tokenize: "reverse", |
| | | tokenize: "forward", |
| | | }, |
| | | { |
| | | field: "content", |
| | | tokenize: "reverse", |
| | | tokenize: "forward", |
| | | }, |
| | | { |
| | | field: "tags", |
| | | tokenize: "reverse", |
| | | tokenize: "forward", |
| | | }, |
| | | ], |
| | | }, |
| | |
| | | * @param index index to fill |
| | | * @param data data to fill index with |
| | | */ |
| | | async function fillDocument(index: Document<Item, false>, data: any) { |
| | | async function fillDocument(index: FlexSearch.Document<Item, false>, data: any) { |
| | | let id = 0 |
| | | for (const [slug, fileData] of Object.entries<ContentDetails>(data)) { |
| | | await index.addAsync(id, { |
| | | await index.addAsync(id++, { |
| | | id, |
| | | slug: slug as FullSlug, |
| | | title: fileData.title, |
| | | content: fileData.content, |
| | | tags: fileData.tags, |
| | | }) |
| | | id++ |
| | | } |
| | | } |