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# Node dependencies
node_modules
dist

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{
"name": "remark-ofm",
"version": "1.0.0",
"main": "dist/index.js",
"exports": "./dist/index.js",
"type": "module",
"scripts": {
"build": "tsc --project tsconfig.build.json",
"test": "vitest",
"format": "prettier --write ."
},
"author": "peaceultime",
"description": "Remark plugin to support Obsidian markdown syntax",
"keywords": [
"remark",
"obsidian"
],
"license": "GPL-3.0",
"dependencies": {
"lodash.capitalize": "^4.2.1",
"mdast-util-find-and-replace": "^3.0.1",
"unist-util-visit": "^4.1.2"
},
"devDependencies": {
"@types/lodash.capitalize": "^4.2.9",
"@types/unist": "^2.0.6",
"mdast-util-to-string": "^3.1.1",
"rehype-raw": "^6.1.1",
"rehype-stringify": "^9.0.3",
"remark-parse": "^10.0.1",
"remark-rehype": "^10.1.0",
"typescript": "^5.0.2",
"unified": "^10.1.2"
}
}

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import capitalize from "lodash.capitalize"
import { visit } from "unist-util-visit"
import { toHast } from "mdast-util-to-hast"
import { toHtml } from "hast-util-to-html"
import { FindAndReplaceList, findAndReplace as mdastFindReplace } from "mdast-util-find-and-replace"
// !? -> 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)
const wikilinkRegex = /!?\[\[([^\[\]\|\#]+)?(#+[^\[\]\|\#]+)?(\|[^\[\]\|\#]+)?\]\]/g;
const highlightRegex = /==([^=]+)==/g;
const commentRegex = /%%(.+)%%/g;
// (?:^| ) -> 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 = /(?:^| )#((?:[-_\p{L}\d])+(?:\/[-_\p{L}\d]+)*)/gmu;
const icons = {
infoIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"></circle><line x1="12" y1="16" x2="12" y2="12"></line><line x1="12" y1="8" x2="12.01" y2="8"></line></svg>`,
pencilIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="2" x2="22" y2="6"></line><path d="M7.5 20.5 19 9l-4-4L3.5 16.5 2 22z"></path></svg>`,
clipboardListIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="8" y="2" width="8" height="4" rx="1" ry="1"></rect><path d="M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2"></path><path d="M12 11h4"></path><path d="M12 16h4"></path><path d="M8 11h.01"></path><path d="M8 16h.01"></path></svg>`,
checkCircleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 22c5.523 0 10-4.477 10-10S17.523 2 12 2 2 6.477 2 12s4.477 10 10 10z"></path><path d="m9 12 2 2 4-4"></path></svg>`,
flameIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M8.5 14.5A2.5 2.5 0 0 0 11 12c0-1.38-.5-2-1-3-1.072-2.143-.224-4.054 2-6 .5 2.5 2 4.9 4 6.5 2 1.6 3 3.5 3 5.5a7 7 0 1 1-14 0c0-1.153.433-2.294 1-3a2.5 2.5 0 0 0 2.5 2.5z"></path></svg>`,
checkIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"></polyline></svg>`,
helpCircleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"></circle><path d="M9.09 9a3 3 0 0 1 5.83 1c0 2-3 3-3 3"></path><line x1="12" y1="17" x2="12.01" y2="17"></line></svg>`,
alertTriangleIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z"></path><line x1="12" y1="9" x2="12" y2="13"></line><line x1="12" y1="17" x2="12.01" y2="17"></line></svg>`,
xIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"></line><line x1="6" y1="6" x2="18" y2="18"></line></svg>`,
zapIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polygon points="13 2 3 14 12 14 11 22 21 10 12 10 13 2"></polygon></svg>`,
bugIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect width="8" height="14" x="8" y="6" rx="4"></rect><path d="m19 7-3 2"></path><path d="m5 7 3 2"></path><path d="m19 19-3-2"></path><path d="m5 19 3-2"></path><path d="M20 13h-4"></path><path d="M4 13h4"></path><path d="m10 4 1 2"></path><path d="m14 4-1 2"></path></svg>`,
listIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="8" y1="6" x2="21" y2="6"></line><line x1="8" y1="12" x2="21" y2="12"></line><line x1="8" y1="18" x2="21" y2="18"></line><line x1="3" y1="6" x2="3.01" y2="6"></line><line x1="3" y1="12" x2="3.01" y2="12"></line><line x1="3" y1="18" x2="3.01" y2="18"></line></svg>`,
quoteIcon: `<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 21c3 0 7-1 7-8V5c0-1.25-.756-2.017-2-2H4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2 1 0 1 0 1 1v1c0 1-1 2-2 2s-1 .008-1 1.031V20c0 1 0 1 1 1z"></path><path d="M15 21c3 0 7-1 7-8V5c0-1.25-.757-2.017-2-2h-4c-1.25 0-2 .75-2 1.972V11c0 1.25.75 2 2 2h.75c0 2.25.25 4-2.75 4v3c0 1 0 1 1 1z"></path></svg>`,
}
const callouts = {
note: icons.pencilIcon,
abstract: icons.clipboardListIcon,
info: icons.infoIcon,
todo: icons.checkCircleIcon,
tip: icons.flameIcon,
success: icons.checkIcon,
question: icons.helpCircleIcon,
warning: icons.alertTriangleIcon,
failure: icons.xIcon,
danger: icons.zapIcon,
bug: icons.bugIcon,
example: icons.listIcon,
quote: icons.quoteIcon,
}
const calloutMapping: Record<string, keyof typeof callouts> = {
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",
}
function mdastToHtml(ast: any) {
const hast = toHast(ast, { allowDangerousHtml: true })!;
return toHtml(hast, { allowDangerousHtml: true });
}
function canonicalizeCallout(calloutName: string): keyof typeof callouts {
let callout = calloutName.toLowerCase() as keyof typeof calloutMapping
return calloutMapping[callout] ?? "note"
}
function sluggify(s: string): string {
return s
.split("/")
.map((segment) => segment.normalize('NFD').replace(/[\u0300-\u036f]/g, '').replace(/^\d\. */g, '').replace(/\s/g, "-").replace(/%/g, "-percent").replace(/\?/g, "-q").toLowerCase()) // slugify all segments
.join("/") // always use / as sep
.replace(/\/$/, "")
}
function slugTag(tag: string) {
return tag
.split("/")
.map((tagSegment) => sluggify(tagSegment))
.join("/")
}
function pathToRoot(slug: string) {
let rootPath = slug
.split("/")
.filter((x) => x !== "")
.slice(0, -1)
.map((_) => "..")
.join("/")
if (rootPath.length === 0) {
rootPath = "."
}
return rootPath;
}
export default function ofm() {
return function (tree: any, file: any) {
const base = pathToRoot(file?.data?.slug ?? '');
const replacements: FindAndReplaceList = []
replacements.push([
wikilinkRegex,
(value: string, ...capture: string[]) => {
let [rawFp, rawHeader, rawAlias] = capture
const fp = rawFp?.trim() ?? ""
const anchor = rawHeader?.trim() ?? ""
const alias = rawAlias?.slice(1).trim();
// internal link
const url = sluggify(fp + anchor)
return {
type: "link",
url,
children: [
{
type: "text",
value: alias ?? fp,
},
],
}
},
])
replacements.push([
highlightRegex,
(_value: string, ...capture: string[]) => {
const [inner] = capture
return {
type: "html",
value: `<span class="text-highlight">${inner}</span>`,
}
},
])
replacements.push([
commentRegex,
(_value: string, ...capture: string[]) => {
const [inner] = capture
return {
type: "html",
value: `<span class="text-comment">${inner}</span>`,
}
},
])
replacements.push([
tagRegex,
(_value: string, tag: string) => {
// Check if the tag only includes numbers
if (/^\d+$/.test(tag)) {
return false
}
tag = slugTag(tag)
return {
type: "link",
url: `/tags/${tag}`,
data: {
hProperties: {
className: ["tag"],
},
},
children: [
{
type: "text",
value: `#${tag}`,
},
],
}
},
])
visit(tree, "html", (node) => {
for (const [regex, replace] of replacements) {
if (typeof replace === "string") {
node.value = node.value.replace(regex, replace)
} else {
node.value = node.value.replaceAll(regex, (substring: string, ...args: any) => {
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);
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 restChildren = firstChild.children.slice(1)
const [firstLine, ...remainingLines] = text.split("\n")
const remainingText = remainingLines.join("\n")
const match = firstLine.match(/^\[\!(\w+)\]([+-]?)/);
if (match && match.input) {
const [calloutDirective, typeString, collapseChar] = match
const calloutType = canonicalizeCallout(
typeString.toLowerCase() as keyof typeof calloutMapping,
)
const collapse = collapseChar === "+" || collapseChar === "-"
const defaultState = collapseChar === "-" ? "collapsed" : "expanded"
const titleContent =
match.input.slice(calloutDirective.length).trim() || capitalize(calloutType)
const titleNode = {
type: "paragraph",
children: [{ type: "text", value: titleContent + " " }, ...restChildren],
}
const title = mdastToHtml(titleNode)
const toggleIcon = `<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="fold">
<polyline points="6 9 12 15 18 9"></polyline>
</svg>`
const titleHtml = {
type: "html",
value: `<div
class="callout-title"
>
<div class="callout-icon">${callouts[calloutType]}</div>
<div class="callout-title-inner">${title}</div>
${collapse ? toggleIcon : ""}
</div>`,
}
const blockquoteContent: any[] = [titleHtml]
if (remainingText.length > 0) {
blockquoteContent.push({
type: "paragraph",
hProperties: { className: "callout-content" },
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 ${collapse ? "is-collapsible" : ""} ${defaultState === "collapsed" ? "is-collapsed" : ""
}`,
"data-callout": calloutType,
"data-callout-fold": collapse,
},
}
}
})
visit(tree, "code", (node) => {
if (node.lang === "mermaid") {
node.data = {
hProperties: {
className: ["mermaid"],
},
}
}
})
}
}

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{
"extends": "./tsconfig.json",
}

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{
"include": [
"src"
],
"compilerOptions": {
"lib": [
"ESNext"
],
"module": "ESNext",
"target": "ESNext",
"strict": true,
"esModuleInterop": true,
"skipLibCheck": false,
"forceConsistentCasingInFileNames": true,
"outDir": "dist",
"declaration": true,
"declarationDir": "dist",
"moduleResolution": "node",
"downlevelIteration": true
}
}