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125 lines
3.7 KiB
TypeScript
125 lines
3.7 KiB
TypeScript
import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
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import breadcrumbsStyle from "./styles/breadcrumbs.scss"
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import { FullSlug, SimpleSlug, resolveRelative } from "../util/path"
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import { QuartzPluginData } from "../plugins/vfile"
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import { classNames } from "../util/lang"
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type CrumbData = {
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displayName: string
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path: string
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}
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interface BreadcrumbOptions {
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/**
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* Symbol between crumbs
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*/
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spacerSymbol: string
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/**
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* Name of first crumb
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*/
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rootName: string
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/**
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* Whether to look up frontmatter title for folders (could cause performance problems with big vaults)
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*/
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resolveFrontmatterTitle: boolean
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/**
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* Whether to display breadcrumbs on root `index.md`
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*/
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hideOnRoot: boolean
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/**
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* Whether to display the current page in the breadcrumbs.
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*/
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showCurrentPage: boolean
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}
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const defaultOptions: BreadcrumbOptions = {
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spacerSymbol: "❯",
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rootName: "Home",
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resolveFrontmatterTitle: true,
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hideOnRoot: true,
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showCurrentPage: true,
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}
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function formatCrumb(displayName: string, baseSlug: FullSlug, currentSlug: SimpleSlug): CrumbData {
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return {
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displayName: displayName.replaceAll("-", " "),
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path: resolveRelative(baseSlug, currentSlug),
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}
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}
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export default ((opts?: Partial<BreadcrumbOptions>) => {
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// Merge options with defaults
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const options: BreadcrumbOptions = { ...defaultOptions, ...opts }
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// computed index of folder name to its associated file data
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let folderIndex: Map<string, QuartzPluginData> | undefined
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function Breadcrumbs({ fileData, allFiles, displayClass }: QuartzComponentProps) {
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// Hide crumbs on root if enabled
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if (options.hideOnRoot && fileData.slug === "index") {
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return <></>
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}
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// Format entry for root element
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const firstEntry = formatCrumb(options.rootName, fileData.slug!, "/" as SimpleSlug)
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const crumbs: CrumbData[] = [firstEntry]
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if (!folderIndex && options.resolveFrontmatterTitle) {
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folderIndex = new Map()
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// construct the index for the first time
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for (const file of allFiles) {
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const folderParts = file.slug?.split("/")
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if (folderParts?.at(-1) === "index") {
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folderIndex.set(folderParts.slice(0, -1).join("/"), file)
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}
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}
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}
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// Split slug into hierarchy/parts
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const slugParts = fileData.slug?.split("/")
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if (slugParts) {
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// full path until current part
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let currentPath = ""
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for (let i = 0; i < slugParts.length - 1; i++) {
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let curPathSegment = slugParts[i]
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// Try to resolve frontmatter folder title
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const currentFile = folderIndex?.get(slugParts.slice(0, i + 1).join("/"))
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if (currentFile) {
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const title = currentFile.frontmatter!.title
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if (title !== "index") {
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curPathSegment = title
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}
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}
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// Add current slug to full path
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currentPath += slugParts[i] + "/"
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// Format and add current crumb
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const crumb = formatCrumb(curPathSegment, fileData.slug!, currentPath as SimpleSlug)
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crumbs.push(crumb)
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}
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// Add current file to crumb (can directly use frontmatter title)
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if (options.showCurrentPage && slugParts.at(-1) !== "index") {
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crumbs.push({
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displayName: fileData.frontmatter!.title,
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path: "",
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})
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}
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}
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return (
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<nav class={classNames(displayClass, "breadcrumb-container")} aria-label="breadcrumbs">
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{crumbs.map((crumb, index) => (
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<div class="breadcrumb-element">
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<a href={crumb.path}>{crumb.displayName}</a>
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{index !== crumbs.length - 1 && <p>{` ${options.spacerSymbol} `}</p>}
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</div>
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))}
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</nav>
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)
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}
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Breadcrumbs.css = breadcrumbsStyle
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return Breadcrumbs
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}) satisfies QuartzComponentConstructor
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