import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
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import legacyStyle from "./styles/legacyToc.scss"
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import modernStyle from "./styles/toc.scss"
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interface Options {
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layout: 'modern' | 'legacy'
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}
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const defaultOptions: Options = {
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layout: 'modern'
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}
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export default ((opts?: Partial<Options>) => {
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const layout = opts?.layout ?? defaultOptions.layout
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function TableOfContents({ fileData }: QuartzComponentProps) {
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if (!fileData.toc) {
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return null
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}
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return <details class="toc" open>
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<summary><h3>Table of Contents</h3></summary>
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<ul>
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{fileData.toc.map(tocEntry => <li key={tocEntry.slug} class={`depth-${tocEntry.depth}`}>
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<a href={`#${tocEntry.slug}`} data-for={tocEntry.slug}>{tocEntry.text}</a>
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</li>)}
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</ul>
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</details>
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}
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TableOfContents.css = layout === "modern" ? modernStyle : legacyStyle
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if (layout === "modern") {
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TableOfContents.afterDOMLoaded = `
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const bufferPx = 150
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const observer = new IntersectionObserver(entries => {
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for (const entry of entries) {
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const slug = entry.target.id
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const tocEntryElement = document.querySelector(\`a[data-for="$\{slug\}"]\`)
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const windowHeight = entry.rootBounds?.height
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if (windowHeight && tocEntryElement) {
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if (entry.boundingClientRect.y < windowHeight) {
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tocEntryElement.classList.add("in-view")
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} else {
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tocEntryElement.classList.remove("in-view")
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}
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}
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}
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})
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function init() {
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const headers = document.querySelectorAll("h1[id], h2[id], h3[id], h4[id], h5[id], h6[id]")
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headers.forEach(header => observer.observe(header))
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}
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init()
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document.addEventListener("spa_nav", (e) => {
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observer.disconnect()
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init()
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})
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`
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}
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return TableOfContents
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}) satisfies QuartzComponentConstructor
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