import { QuartzTransformerPlugin } from "../types" import { Root, Html, BlockContent, DefinitionContent, Paragraph, Code } from "mdast" import { Element, Literal, Root as HtmlRoot } from "hast" import { ReplaceFunction, findAndReplace as mdastFindReplace } from "mdast-util-find-and-replace" import { slug as slugAnchor } from "github-slugger" import rehypeRaw from "rehype-raw" import { SKIP, visit } from "unist-util-visit" import path from "path" import { JSResource } from "../../util/resources" // @ts-ignore import calloutScript from "../../components/scripts/callout.inline.ts" import { FilePath, pathToRoot, slugTag, slugifyFilePath } from "../../util/path" import { toHast } from "mdast-util-to-hast" import { toHtml } from "hast-util-to-html" import { PhrasingContent } from "mdast-util-find-and-replace/lib" import { capitalize } from "../../util/lang" import { PluggableList } from "unified" export interface Options { comments: boolean highlight: boolean wikilinks: boolean callouts: boolean mermaid: boolean parseTags: boolean parseArrows: boolean parseBlockReferences: boolean enableInHtmlEmbed: boolean enableYouTubeEmbed: boolean enableVideoEmbed: boolean } const defaultOptions: Options = { comments: true, highlight: true, wikilinks: true, callouts: true, mermaid: true, parseTags: true, parseArrows: true, parseBlockReferences: true, enableInHtmlEmbed: false, enableYouTubeEmbed: true, enableVideoEmbed: true, } const calloutMapping = { note: "note", abstract: "abstract", summary: "abstract", tldr: "abstract", info: "info", todo: "todo", tip: "tip", hint: "tip", important: "tip", success: "success", check: "success", done: "success", question: "question", help: "question", faq: "question", warning: "warning", attention: "warning", caution: "warning", failure: "failure", missing: "failure", fail: "failure", danger: "danger", error: "danger", bug: "bug", example: "example", quote: "quote", cite: "quote", } as const const arrowMapping: Record = { "->": "→", "-->": "⇒", "=>": "⇒", "==>": "⇒", "<-": "←", "<--": "⇐", "<=": "⇐", "<==": "⇐", } function canonicalizeCallout(calloutName: string): keyof typeof calloutMapping { const normalizedCallout = calloutName.toLowerCase() as keyof typeof calloutMapping // if callout is not recognized, make it a custom one return calloutMapping[normalizedCallout] ?? calloutName } export const externalLinkRegex = /^https?:\/\//i export const arrowRegex = new RegExp(/(-{1,2}>|={1,2}>|<-{1,2}|<={1,2})/, "g") // !? -> optional embedding // \[\[ -> open brace // ([^\[\]\|\#]+) -> one or more non-special characters ([,],|, or #) (name) // (#[^\[\]\|\#]+)? -> # then one or more non-special characters (heading link) // (\|[^\[\]\#]+)? -> | then one or more non-special characters (alias) export const wikilinkRegex = new RegExp( /!?\[\[([^\[\]\|\#]+)?(#+[^\[\]\|\#]+)?(\|[^\[\]\#]+)?\]\]/, "g", ) const highlightRegex = new RegExp(/==([^=]+)==/, "g") const commentRegex = new RegExp(/%%[\s\S]*?%%/, "g") // from https://github.com/escwxyz/remark-obsidian-callout/blob/main/src/index.ts const calloutRegex = new RegExp(/^\[\!(\w+)\]([+-]?)/) const calloutLineRegex = new RegExp(/^> *\[\!\w+\][+-]?.*$/, "gm") // (?:^| ) -> non-capturing group, tag should start be separated by a space or be the start of the line // #(...) -> capturing group, tag itself must start with # // (?:[-_\p{L}\d\p{Z}])+ -> non-capturing group, non-empty string of (Unicode-aware) alpha-numeric characters and symbols, hyphens and/or underscores // (?:\/[-_\p{L}\d\p{Z}]+)*) -> non-capturing group, matches an arbitrary number of tag strings separated by "/" const tagRegex = new RegExp(/(?:^| )#((?:[-_\p{L}\p{Emoji}\d])+(?:\/[-_\p{L}\p{Emoji}\d]+)*)/, "gu") const blockReferenceRegex = new RegExp(/\^([-_A-Za-z0-9]+)$/, "g") const ytLinkRegex = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/ const videoExtensionRegex = new RegExp(/\.(mp4|webm|ogg|avi|mov|flv|wmv|mkv|mpg|mpeg|3gp|m4v)$/) const wikilinkImageEmbedRegex = new RegExp( /^(?(?!^\d*x?\d*$).*?)?(\|?\s*?(?\d+)(x(?\d+))?)?$/, ) export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin | undefined> = ( userOpts, ) => { const opts = { ...defaultOptions, ...userOpts } const mdastToHtml = (ast: PhrasingContent | Paragraph) => { const hast = toHast(ast, { allowDangerousHtml: true })! return toHtml(hast, { allowDangerousHtml: true }) } return { name: "ObsidianFlavoredMarkdown", textTransform(_ctx, src) { // do comments at text level if (opts.comments) { if (src instanceof Buffer) { src = src.toString() } src = src.replace(commentRegex, "") } // pre-transform blockquotes if (opts.callouts) { if (src instanceof Buffer) { src = src.toString() } src = src.replace(calloutLineRegex, (value) => { // force newline after title of callout return value + "\n> " }) } // pre-transform wikilinks (fix anchors to things that may contain illegal syntax e.g. codeblocks, latex) if (opts.wikilinks) { if (src instanceof Buffer) { src = src.toString() } src = src.replace(wikilinkRegex, (value, ...capture) => { const [rawFp, rawHeader, rawAlias]: (string | undefined)[] = capture const fp = rawFp ?? "" const anchor = rawHeader?.trim().replace(/^#+/, "") const blockRef = Boolean(anchor?.startsWith("^")) ? "^" : "" const displayAnchor = anchor ? `#${blockRef}${slugAnchor(anchor)}` : "" const displayAlias = rawAlias ?? rawHeader?.replace("#", "|") ?? "" const embedDisplay = value.startsWith("!") ? "!" : "" if (rawFp?.match(externalLinkRegex)) { return `${embedDisplay}[${displayAlias.replace(/^\|/, "")}](${rawFp})` } return `${embedDisplay}[[${fp}${displayAnchor}${displayAlias}]]` }) } return src }, markdownPlugins() { const plugins: PluggableList = [] // regex replacements plugins.push(() => { return (tree: Root, file) => { const replacements: [RegExp, string | ReplaceFunction][] = [] const base = pathToRoot(file.data.slug!) if (opts.wikilinks) { replacements.push([ wikilinkRegex, (value: string, ...capture: string[]) => { let [rawFp, rawHeader, rawAlias] = capture const fp = rawFp?.trim() ?? "" const anchor = rawHeader?.trim() ?? "" const alias = rawAlias?.slice(1).trim() // embed cases if (value.startsWith("!")) { const ext: string = path.extname(fp).toLowerCase() const url = slugifyFilePath(fp as FilePath) if ([".png", ".jpg", ".jpeg", ".gif", ".bmp", ".svg", ".webp"].includes(ext)) { const match = wikilinkImageEmbedRegex.exec(alias ?? "") const alt = match?.groups?.alt ?? "" const width = match?.groups?.width ?? "auto" const height = match?.groups?.height ?? "auto" return { type: "image", url, data: { hProperties: { width, height, alt, }, }, } } else if ([".mp4", ".webm", ".ogv", ".mov", ".mkv"].includes(ext)) { return { type: "html", value: ``, } } else if ( [".mp3", ".webm", ".wav", ".m4a", ".ogg", ".3gp", ".flac"].includes(ext) ) { return { type: "html", value: ``, } } else if ([".pdf"].includes(ext)) { return { type: "html", value: ``, } } else { const block = anchor return { type: "html", data: { hProperties: { transclude: true } }, value: `
Transclude of ${url}${block}
`, } } // otherwise, fall through to regular link } // internal link const url = fp + anchor return { type: "link", url, children: [ { type: "text", value: alias ?? fp, }, ], } }, ]) } if (opts.highlight) { replacements.push([ highlightRegex, (_value: string, ...capture: string[]) => { const [inner] = capture return { type: "html", value: `${inner}`, } }, ]) } if (opts.parseArrows) { replacements.push([ arrowRegex, (value: string, ..._capture: string[]) => { const maybeArrow = arrowMapping[value] if (maybeArrow === undefined) return SKIP return { type: "html", value: `${maybeArrow}`, } }, ]) } if (opts.parseTags) { replacements.push([ tagRegex, (_value: string, tag: string) => { // Check if the tag only includes numbers if (/^\d+$/.test(tag)) { return false } tag = slugTag(tag) if (file.data.frontmatter) { const noteTags = file.data.frontmatter.tags ?? [] file.data.frontmatter.tags = [...new Set([...noteTags, tag])] } return { type: "link", url: base + `/tags/${tag}`, data: { hProperties: { className: ["tag-link"], }, }, children: [ { type: "text", value: `#${tag}`, }, ], } }, ]) } if (opts.enableInHtmlEmbed) { visit(tree, "html", (node: Html) => { for (const [regex, replace] of replacements) { if (typeof replace === "string") { node.value = node.value.replace(regex, replace) } else { node.value = node.value.replace(regex, (substring: string, ...args) => { const replaceValue = replace(substring, ...args) if (typeof replaceValue === "string") { return replaceValue } else if (Array.isArray(replaceValue)) { return replaceValue.map(mdastToHtml).join("") } else if (typeof replaceValue === "object" && replaceValue !== null) { return mdastToHtml(replaceValue) } else { return substring } }) } } }) } mdastFindReplace(tree, replacements) } }) if (opts.enableVideoEmbed) { plugins.push(() => { return (tree: Root, _file) => { visit(tree, "image", (node, index, parent) => { if (parent && index != undefined && videoExtensionRegex.test(node.url)) { const newNode: Html = { type: "html", value: ``, } parent.children.splice(index, 1, newNode) return SKIP } }) } }) } if (opts.callouts) { plugins.push(() => { return (tree: Root, _file) => { visit(tree, "blockquote", (node) => { if (node.children.length === 0) { return } // find first line const firstChild = node.children[0] if (firstChild.type !== "paragraph" || firstChild.children[0]?.type !== "text") { return } const text = firstChild.children[0].value const restOfTitle = firstChild.children.slice(1) const [firstLine, ...remainingLines] = text.split("\n") const remainingText = remainingLines.join("\n") const match = firstLine.match(calloutRegex) if (match && match.input) { const [calloutDirective, typeString, collapseChar] = match const calloutType = canonicalizeCallout(typeString.toLowerCase()) const collapse = collapseChar === "+" || collapseChar === "-" const defaultState = collapseChar === "-" ? "collapsed" : "expanded" const titleContent = match.input.slice(calloutDirective.length).trim() const useDefaultTitle = titleContent === "" && restOfTitle.length === 0 const titleNode: Paragraph = { type: "paragraph", children: [ { type: "text", value: useDefaultTitle ? capitalize(calloutType) : titleContent + " ", }, ...restOfTitle, ], } const title = mdastToHtml(titleNode) const toggleIcon = `
` const titleHtml: Html = { type: "html", value: `
${title}
${collapse ? toggleIcon : ""}
`, } const blockquoteContent: (BlockContent | DefinitionContent)[] = [titleHtml] if (remainingText.length > 0) { blockquoteContent.push({ type: "paragraph", children: [ { type: "text", value: remainingText, }, ], }) } // replace first line of blockquote with title and rest of the paragraph text node.children.splice(0, 1, ...blockquoteContent) // add properties to base blockquote node.data = { hProperties: { ...(node.data?.hProperties ?? {}), className: `callout ${calloutType} ${collapse ? "is-collapsible" : ""} ${ defaultState === "collapsed" ? "is-collapsed" : "" }`, "data-callout": calloutType, "data-callout-fold": collapse, }, } } }) } }) } if (opts.mermaid) { plugins.push(() => { return (tree: Root, _file) => { visit(tree, "code", (node: Code) => { if (node.lang === "mermaid") { node.data = { hProperties: { className: ["mermaid"], }, } } }) } }) } return plugins }, htmlPlugins() { const plugins: PluggableList = [rehypeRaw] if (opts.parseBlockReferences) { plugins.push(() => { const inlineTagTypes = new Set(["p", "li"]) const blockTagTypes = new Set(["blockquote"]) return (tree: HtmlRoot, file) => { file.data.blocks = {} visit(tree, "element", (node, index, parent) => { if (blockTagTypes.has(node.tagName)) { const nextChild = parent?.children.at(index! + 2) as Element if (nextChild && nextChild.tagName === "p") { const text = nextChild.children.at(0) as Literal if (text && text.value && text.type === "text") { const matches = text.value.match(blockReferenceRegex) if (matches && matches.length >= 1) { parent!.children.splice(index! + 2, 1) const block = matches[0].slice(1) if (!Object.keys(file.data.blocks!).includes(block)) { node.properties = { ...node.properties, id: block, } file.data.blocks![block] = node } } } } } else if (inlineTagTypes.has(node.tagName)) { const last = node.children.at(-1) as Literal if (last && last.value && typeof last.value === "string") { const matches = last.value.match(blockReferenceRegex) if (matches && matches.length >= 1) { last.value = last.value.slice(0, -matches[0].length) const block = matches[0].slice(1) if (!Object.keys(file.data.blocks!).includes(block)) { node.properties = { ...node.properties, id: block, } file.data.blocks![block] = node } } } } }) file.data.htmlAst = tree } }) } if (opts.enableYouTubeEmbed) { plugins.push(() => { return (tree: HtmlRoot) => { visit(tree, "element", (node) => { if (node.tagName === "img" && typeof node.properties.src === "string") { const match = node.properties.src.match(ytLinkRegex) const videoId = match && match[2].length == 11 ? match[2] : null if (videoId) { node.tagName = "iframe" node.properties = { class: "external-embed", allow: "fullscreen", frameborder: 0, width: "600px", height: "350px", src: `https://www.youtube.com/embed/${videoId}`, } } } }) } }) } return plugins }, externalResources() { const js: JSResource[] = [] if (opts.callouts) { js.push({ script: calloutScript, loadTime: "afterDOMReady", contentType: "inline", }) } if (opts.mermaid) { js.push({ script: ` import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.esm.min.mjs'; const darkMode = document.documentElement.getAttribute('saved-theme') === 'dark' mermaid.initialize({ startOnLoad: false, securityLevel: 'loose', theme: darkMode ? 'dark' : 'default' }); document.addEventListener('nav', async () => { await mermaid.run({ querySelector: '.mermaid' }) }); `, loadTime: "afterDOMReady", moduleType: "module", contentType: "inline", }) } return { js } }, } } declare module "vfile" { interface DataMap { blocks: Record htmlAst: HtmlRoot } }