planning

node_modules/mdast-util-math/complex-types.d.ts

@@ -0,0 +1,4 @@
+// To do: next major: remove this file.
+export type {Math, InlineMath} from './index.js'
+
+/// <reference types="./index.js" />

node_modules/mdast-util-math/index.d.ts

@@ -0,0 +1,88 @@
+import type {Literal} from 'mdast'
+
+export {mathFromMarkdown, mathToMarkdown} from './lib/index.js'
+
+export type {ToOptions} from './lib/index.js'
+
+/**
+ * Math (flow).
+ */
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export interface Math extends Literal {
+  /**
+   * Node type.
+   */
+  type: 'math'
+
+  /**
+   * Custom information relating to the node.
+   */
+  meta?: string | undefined | null
+}
+
+/**
+ * Math (text).
+ */
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export interface InlineMath extends Literal {
+  /**
+   * Node type.
+   */
+  type: 'inlineMath'
+}
+
+// Add custom data tracked to turn markdown into a tree.
+declare module 'mdast-util-from-markdown' {
+  // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+  interface CompileData {
+    /**
+     * Whether we’re in math (flow).
+     */
+    mathFlowInside?: boolean | undefined
+  }
+}
+
+// Add custom data tracked to turn a tree into markdown.
+declare module 'mdast-util-to-markdown' {
+  // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+  interface ConstructNameMap {
+    /**
+     * Math (flow).
+     *
+     * ```markdown
+     * > | $$
+     *     ^^
+     * > | a
+     *     ^
+     * > | $$
+     *     ^^
+     * ```
+     */
+    mathFlow: 'mathFlow'
+
+    /**
+     * Math (flow) meta flag.
+     *
+     * ```markdown
+     * > | $$a
+     *       ^
+     *   | b
+     *   | $$
+     * ```
+     */
+    mathFlowMeta: 'mathFlowMeta'
+  }
+}
+
+// Add nodes to tree.
+declare module 'mdast' {
+  // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+  interface StaticPhrasingContentMap {
+    inlineMath: InlineMath
+  }
+
+  // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+  interface BlockContentMap {
+    math: Math
+  }
+}

node_modules/mdast-util-math/index.js

@@ -0,0 +1,2 @@
+// Note: Types exported from `index.d.ts`.
+export {mathFromMarkdown, mathToMarkdown} from './lib/index.js'

node_modules/mdast-util-math/lib/index.d.ts

@@ -0,0 +1,38 @@
+/**
+ * Create an extension for `mdast-util-from-markdown`.
+ *
+ * @returns {FromMarkdownExtension}
+ *   Extension for `mdast-util-from-markdown`.
+ */
+export function mathFromMarkdown(): FromMarkdownExtension
+/**
+ * Create an extension for `mdast-util-to-markdown`.
+ *
+ * @param {ToOptions | null | undefined} [options]
+ *   Configuration.
+ * @returns {ToMarkdownExtension}
+ *   Extension for `mdast-util-to-markdown`.
+ */
+export function mathToMarkdown(
+  options?: ToOptions | null | undefined
+): ToMarkdownExtension
+export type CompileContext = import('mdast-util-from-markdown').CompileContext
+export type FromMarkdownExtension = import('mdast-util-from-markdown').Extension
+export type FromMarkdownHandle = import('mdast-util-from-markdown').Handle
+export type ToMarkdownExtension = import('mdast-util-to-markdown').Options
+export type ToMarkdownHandle = import('mdast-util-to-markdown').Handle
+export type Math = import('../index.js').Math
+export type InlineMath = import('../index.js').InlineMath
+/**
+ * Configuration.
+ */
+export type ToOptions = {
+  /**
+   * Whether to support math (text) with a single dollar.
+   *
+   * Single dollars work in Pandoc and many other places, but often interfere
+   * with “normal” dollars in text.
+   * If you turn this off, you can still use two or more dollars for text math.
+   */
+  singleDollarTextMath?: boolean | null | undefined
+}

node_modules/mdast-util-math/lib/index.js

@@ -0,0 +1,306 @@
+/**
+ * @typedef {import('mdast-util-from-markdown').CompileContext} CompileContext
+ * @typedef {import('mdast-util-from-markdown').Extension} FromMarkdownExtension
+ * @typedef {import('mdast-util-from-markdown').Handle} FromMarkdownHandle
+ * @typedef {import('mdast-util-to-markdown').Options} ToMarkdownExtension
+ * @typedef {import('mdast-util-to-markdown').Handle} ToMarkdownHandle
+ * @typedef {import('../index.js').Math} Math
+ * @typedef {import('../index.js').InlineMath} InlineMath
+ *
+ * @typedef ToOptions
+ *   Configuration.
+ * @property {boolean | null | undefined} [singleDollarTextMath=true]
+ *   Whether to support math (text) with a single dollar.
+ *
+ *   Single dollars work in Pandoc and many other places, but often interfere
+ *   with “normal” dollars in text.
+ *   If you turn this off, you can still use two or more dollars for text math.
+ */
+
+import {longestStreak} from 'longest-streak'
+import {safe} from 'mdast-util-to-markdown/lib/util/safe.js'
+import {track} from 'mdast-util-to-markdown/lib/util/track.js'
+import {patternCompile} from 'mdast-util-to-markdown/lib/util/pattern-compile.js'
+
+/**
+ * Create an extension for `mdast-util-from-markdown`.
+ *
+ * @returns {FromMarkdownExtension}
+ *   Extension for `mdast-util-from-markdown`.
+ */
+export function mathFromMarkdown() {
+  return {
+    enter: {
+      mathFlow: enterMathFlow,
+      mathFlowFenceMeta: enterMathFlowMeta,
+      mathText: enterMathText
+    },
+    exit: {
+      mathFlow: exitMathFlow,
+      mathFlowFence: exitMathFlowFence,
+      mathFlowFenceMeta: exitMathFlowMeta,
+      mathFlowValue: exitMathData,
+      mathText: exitMathText,
+      mathTextData: exitMathData
+    }
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function enterMathFlow(token) {
+    this.enter(
+      {
+        type: 'math',
+        meta: null,
+        value: '',
+        data: {
+          hName: 'div',
+          hProperties: {className: ['math', 'math-display']},
+          hChildren: [{type: 'text', value: ''}]
+        }
+      },
+      token
+    )
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function enterMathFlowMeta() {
+    this.buffer()
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function exitMathFlowMeta() {
+    const data = this.resume()
+    const node = /** @type {Math} */ (this.stack[this.stack.length - 1])
+    node.meta = data
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function exitMathFlowFence() {
+    // Exit if this is the closing fence.
+    if (this.getData('mathFlowInside')) return
+    this.buffer()
+    this.setData('mathFlowInside', true)
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function exitMathFlow(token) {
+    const data = this.resume().replace(/^(\r?\n|\r)|(\r?\n|\r)$/g, '')
+    const node = /** @type {Math} */ (this.exit(token))
+    node.value = data
+    // @ts-expect-error: we defined it.
+    node.data.hChildren[0].value = data
+    this.setData('mathFlowInside')
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function enterMathText(token) {
+    this.enter(
+      {
+        type: 'inlineMath',
+        value: '',
+        data: {
+          hName: 'span',
+          hProperties: {className: ['math', 'math-inline']},
+          hChildren: [{type: 'text', value: ''}]
+        }
+      },
+      token
+    )
+    this.buffer()
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function exitMathText(token) {
+    const data = this.resume()
+    const node = /** @type {Math} */ (this.exit(token))
+    node.value = data
+    // @ts-expect-error: we defined it.
+    node.data.hChildren[0].value = data
+  }
+
+  /**
+   * @this {CompileContext}
+   * @type {FromMarkdownHandle}
+   */
+  function exitMathData(token) {
+    this.config.enter.data.call(this, token)
+    this.config.exit.data.call(this, token)
+  }
+}
+
+/**
+ * Create an extension for `mdast-util-to-markdown`.
+ *
+ * @param {ToOptions | null | undefined} [options]
+ *   Configuration.
+ * @returns {ToMarkdownExtension}
+ *   Extension for `mdast-util-to-markdown`.
+ */
+export function mathToMarkdown(options) {
+  let single = (options || {}).singleDollarTextMath
+
+  if (single === null || single === undefined) {
+    single = true
+  }
+
+  inlineMath.peek = inlineMathPeek
+
+  return {
+    unsafe: [
+      {character: '\r', inConstruct: 'mathFlowMeta'},
+      {character: '\n', inConstruct: 'mathFlowMeta'},
+      {
+        character: '$',
+        after: single ? undefined : '\\$',
+        inConstruct: 'phrasing'
+      },
+      {character: '$', inConstruct: 'mathFlowMeta'},
+      {atBreak: true, character: '$', after: '\\$'}
+    ],
+    handlers: {math, inlineMath}
+  }
+
+  /**
+   * @type {ToMarkdownHandle}
+   * @param {Math} node
+   */
+  // To do: next major: rename `context` to state, `safeOptions` to info.
+  // Note: fixing this code? Please also fix the similar code for code:
+  // <https://github.com/syntax-tree/mdast-util-to-markdown/blob/main/lib/handle/code.js>
+  function math(node, _, context, safeOptions) {
+    const raw = node.value || ''
+    const tracker = track(safeOptions)
+    const sequence = '$'.repeat(Math.max(longestStreak(raw, '$') + 1, 2))
+    const exit = context.enter('mathFlow')
+    let value = tracker.move(sequence)
+
+    if (node.meta) {
+      const subexit = context.enter('mathFlowMeta')
+      value += tracker.move(
+        safe(context, node.meta, {
+          before: value,
+          after: '\n',
+          encode: ['$'],
+          ...tracker.current()
+        })
+      )
+      subexit()
+    }
+
+    value += tracker.move('\n')
+
+    if (raw) {
+      value += tracker.move(raw + '\n')
+    }
+
+    value += tracker.move(sequence)
+    exit()
+    return value
+  }
+
+  /**
+   * @type {ToMarkdownHandle}
+   * @param {InlineMath} node
+   */
+  // Note: fixing this code? Please also fix the similar code for inline code:
+  // <https://github.com/syntax-tree/mdast-util-to-markdown/blob/main/lib/handle/inline-code.js>
+  //
+  // To do: next major: rename `context` to state.
+  // To do: next major: use `state` (`safe`, `track`, `patternCompile`).
+  function inlineMath(node, _, context) {
+    let value = node.value || ''
+    let size = 1
+
+    if (!single) size++
+
+    // If there is a single dollar sign on its own in the math, use a fence of
+    // two.
+    // If there are two in a row, use one.
+    while (
+      new RegExp('(^|[^$])' + '\\$'.repeat(size) + '([^$]|$)').test(value)
+    ) {
+      size++
+    }
+
+    const sequence = '$'.repeat(size)
+
+    // If this is not just spaces or eols (tabs don’t count), and either the
+    // first and last character are a space or eol, or the first or last
+    // character are dollar signs, then pad with spaces.
+    if (
+      // Contains non-space.
+      /[^ \r\n]/.test(value) &&
+      // Starts with space and ends with space.
+      ((/^[ \r\n]/.test(value) && /[ \r\n]$/.test(value)) ||
+        // Starts or ends with dollar.
+        /^\$|\$$/.test(value))
+    ) {
+      value = ' ' + value + ' '
+    }
+
+    let index = -1
+
+    // We have a potential problem: certain characters after eols could result in
+    // blocks being seen.
+    // For example, if someone injected the string `'\n# b'`, then that would
+    // result in an ATX heading.
+    // We can’t escape characters in `inlineMath`, but because eols are
+    // transformed to spaces when going from markdown to HTML anyway, we can swap
+    // them out.
+    while (++index < context.unsafe.length) {
+      const pattern = context.unsafe[index]
+      const expression = patternCompile(pattern)
+      /** @type {RegExpExecArray | null} */
+      let match
+
+      // Only look for `atBreak`s.
+      // Btw: note that `atBreak` patterns will always start the regex at LF or
+      // CR.
+      if (!pattern.atBreak) continue
+
+      while ((match = expression.exec(value))) {
+        let position = match.index
+
+        // Support CRLF (patterns only look for one of the characters).
+        if (
+          value.codePointAt(position) === 10 /* `\n` */ &&
+          value.codePointAt(position - 1) === 13 /* `\r` */
+        ) {
+          position--
+        }
+
+        value = value.slice(0, position) + ' ' + value.slice(match.index + 1)
+      }
+    }
+
+    return sequence + value + sequence
+  }
+
+  /**
+   * @returns {string}
+   */
+  function inlineMathPeek() {
+    return '$'
+  }
+}

node_modules/mdast-util-math/license

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2020 Titus Wormer <tituswormer@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/mdast-util-math/node_modules/longest-streak/index.d.ts

@@ -0,0 +1,11 @@
+/**
+ * Get the count of the longest repeating streak of `substring` in `value`.
+ *
+ * @param {string} value
+ *   Content to search in.
+ * @param {string} substring
+ *   Substring to look for, typically one character.
+ * @returns {number}
+ *   Count of most frequent adjacent `substring`s in `value`.
+ */
+export function longestStreak(value: string, substring: string): number

node_modules/mdast-util-math/node_modules/longest-streak/index.js

@@ -0,0 +1,36 @@
+/**
+ * Get the count of the longest repeating streak of `substring` in `value`.
+ *
+ * @param {string} value
+ *   Content to search in.
+ * @param {string} substring
+ *   Substring to look for, typically one character.
+ * @returns {number}
+ *   Count of most frequent adjacent `substring`s in `value`.
+ */
+export function longestStreak(value, substring) {
+  const source = String(value)
+  let index = source.indexOf(substring)
+  let expected = index
+  let count = 0
+  let max = 0
+
+  if (typeof substring !== 'string') {
+    throw new TypeError('Expected substring')
+  }
+
+  while (index !== -1) {
+    if (index === expected) {
+      if (++count > max) {
+        max = count
+      }
+    } else {
+      count = 1
+    }
+
+    expected = index + substring.length
+    index = source.indexOf(substring, expected)
+  }
+
+  return max
+}

node_modules/mdast-util-math/node_modules/longest-streak/license

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2015 Titus Wormer <mailto:tituswormer@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/mdast-util-math/node_modules/longest-streak/package.json

@@ -0,0 +1,73 @@
+{
+  "name": "longest-streak",
+  "version": "3.1.0",
+  "description": "Count the longest repeating streak of a substring",
+  "license": "MIT",
+  "keywords": [
+    "count",
+    "length",
+    "longest",
+    "repeating",
+    "streak",
+    "substring",
+    "character"
+  ],
+  "repository": "wooorm/longest-streak",
+  "bugs": "https://github.com/wooorm/longest-streak/issues",
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/wooorm"
+  },
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "files": [
+    "index.d.ts",
+    "index.js"
+  ],
+  "devDependencies": {
+    "@types/node": "^18.0.0",
+    "c8": "^7.0.0",
+    "prettier": "^2.0.0",
+    "remark-cli": "^11.0.0",
+    "remark-preset-wooorm": "^9.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^4.0.0",
+    "xo": "^0.52.0"
+  },
+  "scripts": {
+    "prepack": "npm run build && npm run format",
+    "build": "tsc --build --clean && tsc --build && type-coverage",
+    "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
+    "test": "npm run build && npm run format && npm run test-coverage"
+  },
+  "prettier": {
+    "tabWidth": 2,
+    "useTabs": false,
+    "singleQuote": true,
+    "bracketSpacing": false,
+    "semi": false,
+    "trailingComma": "none"
+  },
+  "xo": {
+    "prettier": true
+  },
+  "remarkConfig": {
+    "plugins": [
+      "preset-wooorm"
+    ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "strict": true,
+    "ignoreCatch": true
+  }
+}

node_modules/mdast-util-math/node_modules/longest-streak/readme.md

@@ -0,0 +1,150 @@
+# longest-streak
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][size-badge]][size]
+
+Get the count of the longest repeating streak of `substring` in `value`.
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`longestStreak(value, substring)`](#longeststreakvalue-substring)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This is a tiny package that finds the count of the longest adjacent repeating
+substring.
+
+## When should I use this?
+
+This package is rather niche.
+I use it for serializing markdown ASTs (particularly fenced code and math).
+
+You can use [`ccount`][ccount] if you need the total count of substrings
+occuring in a value.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 14.14+, 16.0+), install with [npm][]:
+
+```sh
+npm install longest-streak
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {longestStreak} from 'https://esm.sh/longest-streak@3'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {longestStreak} from 'https://esm.sh/longest-streak@3?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {longestStreak} from 'longest-streak'
+
+longestStreak('` foo `` bar `', '`') // => 2
+```
+
+## API
+
+This package exports the identifier `longestStreak`.
+There is no default export.
+
+### `longestStreak(value, substring)`
+
+Get the count of the longest repeating streak of `substring` in `value`.
+
+###### Parameters
+
+*   `value` (`string`) — content to search in
+*   `substring` (`string`) — substring to look for, typically one character
+
+###### Returns
+
+Count of most frequent adjacent `substring`s in `value` (`number`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports no additional types.
+
+## Compatibility
+
+This package is at least compatible with all maintained versions of Node.js.
+As of now, that is Node.js 14.14+ and 16.0+.
+It also works in Deno and modern browsers.
+
+## Security
+
+This package is safe.
+
+## Related
+
+*   [`wooorm/ccount`](https://github.com/wooorm/ccount)
+    — count the total number of `substring`s in `value`
+*   [`wooorm/direction`](https://github.com/wooorm/direction)
+    — detect directionality: left-to-right, right-to-left, or neutral
+
+## Contribute
+
+Yes please!
+See [How to Contribute to Open Source][contribute].
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/wooorm/longest-streak/workflows/main/badge.svg
+
+[build]: https://github.com/wooorm/longest-streak/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/wooorm/longest-streak.svg
+
+[coverage]: https://codecov.io/github/wooorm/longest-streak
+
+[downloads-badge]: https://img.shields.io/npm/dm/longest-streak.svg
+
+[downloads]: https://www.npmjs.com/package/longest-streak
+
+[size-badge]: https://img.shields.io/bundlephobia/minzip/longest-streak.svg
+
+[size]: https://bundlephobia.com/result?p=longest-streak
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esmsh]: https://esm.sh
+
+[license]: license
+
+[author]: https://wooorm.com
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[typescript]: https://www.typescriptlang.org
+
+[contribute]: https://opensource.guide/how-to-contribute/
+
+[ccount]: https://github.com/wooorm/ccount

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/index.d.ts

@@ -0,0 +1 @@
+export {phrasing} from './lib/index.js'

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/index.js

@@ -0,0 +1 @@
+export {phrasing} from './lib/index.js'

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/lib/index.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Check if the given value is *phrasing content*.
+ *
+ * @param
+ *   Thing to check, typically `Node`.
+ * @returns
+ *   Whether `node` is phrasing content.
+ */
+export const phrasing: AssertPredicatePhrasing
+export type PhrasingContent = import('mdast').PhrasingContent
+export type AssertPredicatePhrasing =
+  import('unist-util-is').AssertPredicate<PhrasingContent>

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/lib/index.js

@@ -0,0 +1,31 @@
+/**
+ * @typedef {import('mdast').PhrasingContent} PhrasingContent
+ * @typedef {import('unist-util-is').AssertPredicate<PhrasingContent>} AssertPredicatePhrasing
+ */
+
+import {convert} from 'unist-util-is'
+
+/**
+ * Check if the given value is *phrasing content*.
+ *
+ * @param
+ *   Thing to check, typically `Node`.
+ * @returns
+ *   Whether `value` is phrasing content.
+ */
+export const phrasing = /** @type {AssertPredicatePhrasing} */ (
+  convert([
+    'break',
+    'delete',
+    'emphasis',
+    'footnote',
+    'footnoteReference',
+    'image',
+    'imageReference',
+    'inlineCode',
+    'link',
+    'linkReference',
+    'strong',
+    'text'
+  ])
+)

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/license

@@ -0,0 +1,23 @@
+(The MIT License)
+
+Copyright (c) 2017 Titus Wormer <tituswormer@gmail.com>
+Copyright (c) 2017 Victor Felder <victor@draft.li>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/package.json

@@ -0,0 +1,78 @@
+{
+  "name": "mdast-util-phrasing",
+  "version": "3.0.1",
+  "description": "mdast utility to check if a node is phrasing content",
+  "license": "MIT",
+  "keywords": [
+    "unist",
+    "mdast",
+    "mdast=util",
+    "util",
+    "utility",
+    "markdown",
+    "phrasing"
+  ],
+  "repository": "syntax-tree/mdast-util-phrasing",
+  "bugs": "https://github.com/syntax-tree/mdast-util-phrasing/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/unified"
+  },
+  "author": "Victor Felder <victor@draft.li> (https://draft.li)",
+  "contributors": [
+    "Victor Felder <victor@draft.li> (https://draft.li)",
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "files": [
+    "lib/",
+    "index.d.ts",
+    "index.js"
+  ],
+  "dependencies": {
+    "@types/mdast": "^3.0.0",
+    "unist-util-is": "^5.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^18.0.0",
+    "c8": "^7.0.0",
+    "prettier": "^2.0.0",
+    "remark-cli": "^11.0.0",
+    "remark-preset-wooorm": "^9.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^4.0.0",
+    "xo": "^0.53.0"
+  },
+  "scripts": {
+    "prepack": "npm run build && npm run format",
+    "build": "tsc --build --clean && tsc --build && type-coverage",
+    "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
+    "test": "npm run build && npm run format && npm run test-coverage"
+  },
+  "prettier": {
+    "tabWidth": 2,
+    "useTabs": false,
+    "singleQuote": true,
+    "bracketSpacing": false,
+    "semi": false,
+    "trailingComma": "none"
+  },
+  "xo": {
+    "prettier": true
+  },
+  "remarkConfig": {
+    "plugins": [
+      "preset-wooorm"
+    ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "strict": true
+  }
+}

node_modules/mdast-util-math/node_modules/mdast-util-phrasing/readme.md

@@ -0,0 +1,195 @@
+# mdast-util-phrasing
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][size-badge]][size]
+[![Sponsors][sponsors-badge]][collective]
+[![Backers][backers-badge]][collective]
+[![Chat][chat-badge]][chat]
+
+[mdast][] utility to check if a node is phrasing content.
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`phrasing(value)`](#phrasingvalue)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package is a tiny utility to check that a given [node][] is [phrasing
+content][phrasing].
+
+## When should I use this?
+
+This utility is typically useful if you’re making other utilities.
+It uses [`unist-util-is`][unist-util-is], which you can use for your own checks.
+
+A different utility, [`hast-util-phrasing`][hast-util-phrasing], does the same
+but on [hast][].
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 14.14+ and 16.0+), install with [npm][]:
+
+```sh
+npm install mdast-util-phrasing
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {phrasing} from 'https://esm.sh/mdast-util-phrasing@3'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {phrasing} from 'https://esm.sh/mdast-util-phrasing@3?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {phrasing} from 'mdast-util-phrasing'
+
+phrasing({type: 'paragraph', children: [{type: 'text', value: 'Alpha'}]})
+// => false
+
+phrasing({type: 'strong', children: [{type: 'text', value: 'Delta'}]})
+// => true
+```
+
+## API
+
+This package exports the identifier [`phrasing`][api-phrasing].
+There is no default export.
+
+### `phrasing(value)`
+
+Check if the given value is *[phrasing content][phrasing]*.
+
+###### Parameters
+
+*   `value` (`unknown`)
+    — thing to check, typically [`Node`][node]
+
+###### Returns
+
+Whether `value` is phrasing content (`boolean`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It does not export extra types.
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with all maintained
+versions of Node.js.
+As of now, that is Node.js 14.14+ and 16.0+.
+Our projects sometimes work with older versions, but this is not guaranteed.
+
+## Security
+
+Use of `mdast-util-phrasing` does not involve **[hast][]**, user content, or
+change the tree, so there are no openings for [cross-site scripting (XSS)][xss]
+attacks.
+
+## Related
+
+*   [`hast-util-phrasing`](https://github.com/syntax-tree/hast-util-phrasing)
+    — check if a hast node is phrasing content
+*   [`unist-util-is`](https://github.com/syntax-tree/unist-util-is)
+    — check if a node passes a test
+
+## Contribute
+
+See [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for
+ways to get started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organization, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Victor Felder][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/syntax-tree/mdast-util-phrasing/workflows/main/badge.svg
+
+[build]: https://github.com/syntax-tree/mdast-util-phrasing/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/mdast-util-phrasing.svg
+
+[coverage]: https://codecov.io/github/syntax-tree/mdast-util-phrasing
+
+[downloads-badge]: https://img.shields.io/npm/dm/mdast-util-phrasing.svg
+
+[downloads]: https://www.npmjs.com/package/mdast-util-phrasing
+
+[size-badge]: https://img.shields.io/bundlephobia/minzip/mdast-util-phrasing.svg
+
+[size]: https://bundlephobia.com/result?p=mdast-util-phrasing
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[collective]: https://opencollective.com/unified
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/syntax-tree/unist/discussions
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[esmsh]: https://esm.sh
+
+[typescript]: https://www.typescriptlang.org
+
+[license]: license
+
+[author]: https://draft.li
+
+[health]: https://github.com/syntax-tree/.github
+
+[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md
+
+[support]: https://github.com/syntax-tree/.github/blob/main/support.md
+
+[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md
+
+[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
+
+[hast]: https://github.com/syntax-tree/hast
+
+[mdast]: https://github.com/syntax-tree/mdast
+
+[node]: https://github.com/syntax-tree/mdast#nodes
+
+[phrasing]: https://github.com/syntax-tree/mdast#phrasingcontent
+
+[unist-util-is]: https://github.com/syntax-tree/unist-util-is
+
+[hast-util-phrasing]: https://github.com/syntax-tree/hast-util-phrasing
+
+[api-phrasing]: #phrasingvalue

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/index.d.ts

@@ -0,0 +1,327 @@
+import type {Info, State} from './lib/types.js'
+
+/**
+ * Interface of registered constructs.
+ *
+ * When working on extensions that use new constructs, extend the corresponding
+ * interface to register its name:
+ *
+ * ```ts
+ * declare module 'mdast-util-to-markdown' {
+ *   interface ConstructNameMap {
+ *     // Register a new construct name (value is used, key should match it).
+ *     gfmStrikethrough: 'gfmStrikethrough'
+ *   }
+ * }
+ * ```
+ */
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export interface ConstructNameMap {
+  /**
+   * Whole autolink.
+   *
+   * ```markdown
+   * > | <https://example.com> and <admin@example.com>
+   *     ^^^^^^^^^^^^^^^^^^^^^     ^^^^^^^^^^^^^^^^^^^
+   * ```
+   */
+  autolink: 'autolink'
+  /**
+   * Whole block quote.
+   *
+   * ```markdown
+   * > | > a
+   *     ^^^
+   * > | b
+   *     ^
+   * ```
+   */
+  blockquote: 'blockquote'
+  /**
+   * Whole code (indented).
+   *
+   * ```markdown
+   * ␠␠␠␠console.log(1)
+   * ^^^^^^^^^^^^^^^^^^
+   * ```
+   */
+  codeIndented: 'codeIndented'
+  /**
+   * Whole code (fenced).
+   *
+   * ````markdown
+   * > | ```js
+   *     ^^^^^
+   * > | console.log(1)
+   *     ^^^^^^^^^^^^^^
+   * > | ```
+   *     ^^^
+   * ````
+   */
+  codeFenced: 'codeFenced'
+  /**
+   * Code (fenced) language, when fenced with grave accents.
+   *
+   * ````markdown
+   * > | ```js
+   *        ^^
+   *   | console.log(1)
+   *   | ```
+   * ````
+   */
+  codeFencedLangGraveAccent: 'codeFencedLangGraveAccent'
+  /**
+   * Code (fenced) language, when fenced with tildes.
+   *
+   * ````markdown
+   * > | ~~~js
+   *        ^^
+   *   | console.log(1)
+   *   | ~~~
+   * ````
+   */
+  codeFencedLangTilde: 'codeFencedLangTilde'
+  /**
+   * Code (fenced) meta string, when fenced with grave accents.
+   *
+   * ````markdown
+   * > | ```js eval
+   *           ^^^^
+   *   | console.log(1)
+   *   | ```
+   * ````
+   */
+  codeFencedMetaGraveAccent: 'codeFencedMetaGraveAccent'
+  /**
+   * Code (fenced) meta string, when fenced with tildes.
+   *
+   * ````markdown
+   * > | ~~~js eval
+   *           ^^^^
+   *   | console.log(1)
+   *   | ~~~
+   * ````
+   */
+  codeFencedMetaTilde: 'codeFencedMetaTilde'
+  /**
+   * Whole definition.
+   *
+   * ```markdown
+   * > | [a]: b "c"
+   *     ^^^^^^^^^^
+   * ```
+   */
+  definition: 'definition'
+  /**
+   * Destination (literal) (occurs in definition, image, link).
+   *
+   * ```markdown
+   * > | [a]: <b> "c"
+   *          ^^^
+   * > | a ![b](<c> "d") e
+   *            ^^^
+   * ```
+   */
+  destinationLiteral: 'destinationLiteral'
+  /**
+   * Destination (raw) (occurs in definition, image, link).
+   *
+   * ```markdown
+   * > | [a]: b "c"
+   *          ^
+   * > | a ![b](c "d") e
+   *            ^
+   * ```
+   */
+  destinationRaw: 'destinationRaw'
+  /**
+   * Emphasis.
+   *
+   * ```markdown
+   * > | *a*
+   *     ^^^
+   * ```
+   */
+  emphasis: 'emphasis'
+  /**
+   * Whole heading (atx).
+   *
+   * ```markdown
+   * > | # alpha
+   *     ^^^^^^^
+   * ```
+   */
+  headingAtx: 'headingAtx'
+  /**
+   * Whole heading (setext).
+   *
+   * ```markdown
+   * > | alpha
+   *     ^^^^^
+   * > | =====
+   *     ^^^^^
+   * ```
+   */
+  headingSetext: 'headingSetext'
+  /**
+   * Whole image.
+   *
+   * ```markdown
+   * > | ![a](b)
+   *     ^^^^^^^
+   * > | ![c]
+   *     ^^^^
+   * ```
+   */
+  image: 'image'
+  /**
+   * Whole image reference.
+   *
+   * ```markdown
+   * > | ![a]
+   *     ^^^^
+   * ```
+   */
+  imageReference: 'imageReference'
+  /**
+   * Label (occurs in definitions, image reference, image, link reference,
+   * link).
+   *
+   * ```markdown
+   * > | [a]: b "c"
+   *     ^^^
+   * > | a [b] c
+   *       ^^^
+   * > | a ![b][c] d
+   *       ^^^^
+   * > | a [b](c) d
+   *       ^^^
+   * ```
+   */
+  label: 'label'
+  /**
+   * Whole link.
+   *
+   * ```markdown
+   * > | [a](b)
+   *     ^^^^^^
+   * > | [c]
+   *     ^^^
+   * ```
+   */
+  link: 'link'
+  /**
+   * Whole link reference.
+   *
+   * ```markdown
+   * > | [a]
+   *     ^^^
+   * ```
+   */
+  linkReference: 'linkReference'
+  /**
+   * List.
+   *
+   * ```markdown
+   * > | * a
+   *     ^^^
+   * > | 1. b
+   *     ^^^^
+   * ```
+   */
+  list: 'list'
+  /**
+   * List item.
+   *
+   * ```markdown
+   * > | * a
+   *     ^^^
+   * > | 1. b
+   *     ^^^^
+   * ```
+   */
+  listItem: 'listItem'
+  /**
+   * Paragraph.
+   *
+   * ```markdown
+   * > | a b
+   *     ^^^
+   * > | c.
+   *     ^^
+   * ```
+   */
+  paragraph: 'paragraph'
+  /**
+   * Phrasing (occurs in headings, paragraphs, etc).
+   *
+   * ```markdown
+   * > | a
+   *     ^
+   * ```
+   */
+  phrasing: 'phrasing'
+  /**
+   * Reference (occurs in image, link).
+   *
+   * ```markdown
+   * > | [a][]
+   *        ^^
+   * ```
+   */
+  reference: 'reference'
+  /**
+   * Strong.
+   *
+   * ```markdown
+   * > | **a**
+   *     ^^^^^
+   * ```
+   */
+  strong: 'strong'
+  /**
+   * Title using single quotes (occurs in definition, image, link).
+   *
+   * ```markdown
+   * > | [a](b 'c')
+   *           ^^^
+   * ```
+   */
+  titleApostrophe: 'titleApostrophe'
+  /**
+   * Title using double quotes (occurs in definition, image, link).
+   *
+   * ```markdown
+   * > | [a](b "c")
+   *           ^^^
+   * ```
+   */
+  titleQuote: 'titleQuote'
+}
+
+/**
+ * Construct names for things generated by `mdast-util-to-markdown`.
+ *
+ * This is an enum of strings, each being a semantic label, useful to know when
+ * serializing whether we’re for example in a double (`"`) or single (`'`)
+ * quoted title.
+ */
+export type ConstructName = ConstructNameMap[keyof ConstructNameMap]
+
+export {toMarkdown} from './lib/index.js'
+export {handle as defaultHandlers} from './lib/handle/index.js'
+export type {
+  Handle,
+  Handlers,
+  Info,
+  Join,
+  Map,
+  Options,
+  SafeConfig,
+  State,
+  Tracker,
+  Unsafe
+} from './lib/types.js'
+// Deprecated.
+export type SafeOptions = Info
+export type Context = State

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/index.js

@@ -0,0 +1,2 @@
+export {toMarkdown} from './lib/index.js'
+export {handle as defaultHandlers} from './lib/handle/index.js'

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/configure.d.ts

@@ -0,0 +1,12 @@
+/**
+ * @typedef {import('./types.js').Options} Options
+ * @typedef {import('./types.js').State} State
+ */
+/**
+ * @param {State} base
+ * @param {Options} extension
+ * @returns {State}
+ */
+export function configure(base: State, extension: Options): State
+export type Options = import('./types.js').Options
+export type State = import('./types.js').State

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/configure.js

@@ -0,0 +1,39 @@
+/**
+ * @typedef {import('./types.js').Options} Options
+ * @typedef {import('./types.js').State} State
+ */
+
+/**
+ * @param {State} base
+ * @param {Options} extension
+ * @returns {State}
+ */
+export function configure(base, extension) {
+  let index = -1
+  /** @type {keyof Options} */
+  let key
+
+  // First do subextensions.
+  if (extension.extensions) {
+    while (++index < extension.extensions.length) {
+      configure(base, extension.extensions[index])
+    }
+  }
+
+  for (key in extension) {
+    if (key === 'extensions') {
+      // Empty.
+    } else if (key === 'unsafe' || key === 'join') {
+      /* c8 ignore next 2 */
+      // @ts-expect-error: hush.
+      base[key] = [...(base[key] || []), ...(extension[key] || [])]
+    } else if (key === 'handlers') {
+      base[key] = Object.assign(base[key], extension[key] || {})
+    } else {
+      // @ts-expect-error: hush.
+      base.options[key] = extension[key]
+    }
+  }
+
+  return base
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/blockquote.d.ts

@@ -0,0 +1,25 @@
+/**
+ * @typedef {import('mdast').Blockquote} Blockquote
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Map} Map
+ */
+/**
+ * @param {Blockquote} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function blockquote(
+  node: Blockquote,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Blockquote = import('mdast').Blockquote
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+export type Map = import('../types.js').Map

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/blockquote.js

@@ -0,0 +1,32 @@
+/**
+ * @typedef {import('mdast').Blockquote} Blockquote
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Map} Map
+ */
+
+/**
+ * @param {Blockquote} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function blockquote(node, _, state, info) {
+  const exit = state.enter('blockquote')
+  const tracker = state.createTracker(info)
+  tracker.move('> ')
+  tracker.shift(2)
+  const value = state.indentLines(
+    state.containerFlow(node, tracker.current()),
+    map
+  )
+  exit()
+  return value
+}
+
+/** @type {Map} */
+function map(line, _, blank) {
+  return '>' + (blank ? '' : ' ') + line
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/break.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @param {Break} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function hardBreak(
+  _: Break,
+  _1: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Break = import('mdast').Break
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/break.js

@@ -0,0 +1,32 @@
+/**
+ * @typedef {import('mdast').Break} Break
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {patternInScope} from '../util/pattern-in-scope.js'
+
+/**
+ * @param {Break} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function hardBreak(_, _1, state, info) {
+  let index = -1
+
+  while (++index < state.unsafe.length) {
+    // If we can’t put eols in this construct (setext headings, tables), use a
+    // space instead.
+    if (
+      state.unsafe[index].character === '\n' &&
+      patternInScope(state.stack, state.unsafe[index])
+    ) {
+      return /[ \t]/.test(info.before) ? '' : ' '
+    }
+  }
+
+  return '\\\n'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/code.d.ts

@@ -0,0 +1,18 @@
+/**
+ * @param {Code} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function code(
+  node: Code,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Code = import('mdast').Code
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+export type Map = import('../types.js').Map

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/code.js

@@ -0,0 +1,78 @@
+/**
+ * @typedef {import('mdast').Code} Code
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Map} Map
+ */
+
+import {longestStreak} from 'longest-streak'
+import {formatCodeAsIndented} from '../util/format-code-as-indented.js'
+import {checkFence} from '../util/check-fence.js'
+
+/**
+ * @param {Code} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function code(node, _, state, info) {
+  const marker = checkFence(state)
+  const raw = node.value || ''
+  const suffix = marker === '`' ? 'GraveAccent' : 'Tilde'
+
+  if (formatCodeAsIndented(node, state)) {
+    const exit = state.enter('codeIndented')
+    const value = state.indentLines(raw, map)
+    exit()
+    return value
+  }
+
+  const tracker = state.createTracker(info)
+  const sequence = marker.repeat(Math.max(longestStreak(raw, marker) + 1, 3))
+  const exit = state.enter('codeFenced')
+  let value = tracker.move(sequence)
+
+  if (node.lang) {
+    const subexit = state.enter(`codeFencedLang${suffix}`)
+    value += tracker.move(
+      state.safe(node.lang, {
+        before: value,
+        after: ' ',
+        encode: ['`'],
+        ...tracker.current()
+      })
+    )
+    subexit()
+  }
+
+  if (node.lang && node.meta) {
+    const subexit = state.enter(`codeFencedMeta${suffix}`)
+    value += tracker.move(' ')
+    value += tracker.move(
+      state.safe(node.meta, {
+        before: value,
+        after: '\n',
+        encode: ['`'],
+        ...tracker.current()
+      })
+    )
+    subexit()
+  }
+
+  value += tracker.move('\n')
+
+  if (raw) {
+    value += tracker.move(raw + '\n')
+  }
+
+  value += tracker.move(sequence)
+  exit()
+  return value
+}
+
+/** @type {Map} */
+function map(line, _, blank) {
+  return (blank ? '' : '    ') + line
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/definition.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @param {Definition} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function definition(
+  node: Definition,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Definition = import('mdast').Definition
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/definition.js

@@ -0,0 +1,78 @@
+/**
+ * @typedef {import('mdast').Definition} Definition
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkQuote} from '../util/check-quote.js'
+
+/**
+ * @param {Definition} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function definition(node, _, state, info) {
+  const quote = checkQuote(state)
+  const suffix = quote === '"' ? 'Quote' : 'Apostrophe'
+  const exit = state.enter('definition')
+  let subexit = state.enter('label')
+  const tracker = state.createTracker(info)
+  let value = tracker.move('[')
+  value += tracker.move(
+    state.safe(state.associationId(node), {
+      before: value,
+      after: ']',
+      ...tracker.current()
+    })
+  )
+  value += tracker.move(']: ')
+
+  subexit()
+
+  if (
+    // If there’s no url, or…
+    !node.url ||
+    // If there are control characters or whitespace.
+    /[\0- \u007F]/.test(node.url)
+  ) {
+    subexit = state.enter('destinationLiteral')
+    value += tracker.move('<')
+    value += tracker.move(
+      state.safe(node.url, {before: value, after: '>', ...tracker.current()})
+    )
+    value += tracker.move('>')
+  } else {
+    // No whitespace, raw is prettier.
+    subexit = state.enter('destinationRaw')
+    value += tracker.move(
+      state.safe(node.url, {
+        before: value,
+        after: node.title ? ' ' : '\n',
+        ...tracker.current()
+      })
+    )
+  }
+
+  subexit()
+
+  if (node.title) {
+    subexit = state.enter(`title${suffix}`)
+    value += tracker.move(' ' + quote)
+    value += tracker.move(
+      state.safe(node.title, {
+        before: value,
+        after: quote,
+        ...tracker.current()
+      })
+    )
+    value += tracker.move(quote)
+    subexit()
+  }
+
+  exit()
+
+  return value
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/emphasis.d.ts

@@ -0,0 +1,32 @@
+/**
+ * @param {Emphasis} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function emphasis(
+  node: Emphasis,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace emphasis {
+  export {emphasisPeek as peek}
+}
+export type Emphasis = import('mdast').Emphasis
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+/**
+ * @param {Emphasis} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+declare function emphasisPeek(
+  _: Emphasis,
+  _1: Parent | undefined,
+  state: State
+): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/emphasis.js

@@ -0,0 +1,48 @@
+/**
+ * @typedef {import('mdast').Emphasis} Emphasis
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkEmphasis} from '../util/check-emphasis.js'
+
+emphasis.peek = emphasisPeek
+
+// To do: there are cases where emphasis cannot “form” depending on the
+// previous or next character of sequences.
+// There’s no way around that though, except for injecting zero-width stuff.
+// Do we need to safeguard against that?
+/**
+ * @param {Emphasis} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function emphasis(node, _, state, info) {
+  const marker = checkEmphasis(state)
+  const exit = state.enter('emphasis')
+  const tracker = state.createTracker(info)
+  let value = tracker.move(marker)
+  value += tracker.move(
+    state.containerPhrasing(node, {
+      before: value,
+      after: marker,
+      ...tracker.current()
+    })
+  )
+  value += tracker.move(marker)
+  exit()
+  return value
+}
+
+/**
+ * @param {Emphasis} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+function emphasisPeek(_, _1, state) {
+  return state.options.emphasis || '*'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/heading.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @param {Heading} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function heading(
+  node: Heading,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Heading = import('mdast').Heading
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/heading.js

@@ -0,0 +1,80 @@
+/**
+ * @typedef {import('mdast').Heading} Heading
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {formatHeadingAsSetext} from '../util/format-heading-as-setext.js'
+
+/**
+ * @param {Heading} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function heading(node, _, state, info) {
+  const rank = Math.max(Math.min(6, node.depth || 1), 1)
+  const tracker = state.createTracker(info)
+
+  if (formatHeadingAsSetext(node, state)) {
+    const exit = state.enter('headingSetext')
+    const subexit = state.enter('phrasing')
+    const value = state.containerPhrasing(node, {
+      ...tracker.current(),
+      before: '\n',
+      after: '\n'
+    })
+    subexit()
+    exit()
+
+    return (
+      value +
+      '\n' +
+      (rank === 1 ? '=' : '-').repeat(
+        // The whole size…
+        value.length -
+          // Minus the position of the character after the last EOL (or
+          // 0 if there is none)…
+          (Math.max(value.lastIndexOf('\r'), value.lastIndexOf('\n')) + 1)
+      )
+    )
+  }
+
+  const sequence = '#'.repeat(rank)
+  const exit = state.enter('headingAtx')
+  const subexit = state.enter('phrasing')
+
+  // Note: for proper tracking, we should reset the output positions when there
+  // is no content returned, because then the space is not output.
+  // Practically, in that case, there is no content, so it doesn’t matter that
+  // we’ve tracked one too many characters.
+  tracker.move(sequence + ' ')
+
+  let value = state.containerPhrasing(node, {
+    before: '# ',
+    after: '\n',
+    ...tracker.current()
+  })
+
+  if (/^[\t ]/.test(value)) {
+    // To do: what effect has the character reference on tracking?
+    value =
+      '&#x' +
+      value.charCodeAt(0).toString(16).toUpperCase() +
+      ';' +
+      value.slice(1)
+  }
+
+  value = value ? sequence + ' ' + value : sequence
+
+  if (state.options.closeAtx) {
+    value += ' ' + sequence
+  }
+
+  subexit()
+  exit()
+
+  return value
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/html.d.ts

@@ -0,0 +1,14 @@
+/**
+ * @param {HTML} node
+ * @returns {string}
+ */
+export function html(node: HTML): string
+export namespace html {
+  export {htmlPeek as peek}
+}
+export type HTML = import('mdast').HTML
+/**
+ * @returns {string}
+ */
+declare function htmlPeek(): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/html.js

@@ -0,0 +1,20 @@
+/**
+ * @typedef {import('mdast').HTML} HTML
+ */
+
+html.peek = htmlPeek
+
+/**
+ * @param {HTML} node
+ * @returns {string}
+ */
+export function html(node) {
+  return node.value || ''
+}
+
+/**
+ * @returns {string}
+ */
+function htmlPeek() {
+  return '<'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/image-reference.d.ts

@@ -0,0 +1,25 @@
+/**
+ * @param {ImageReference} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function imageReference(
+  node: ImageReference,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace imageReference {
+  export {imageReferencePeek as peek}
+}
+export type ImageReference = import('mdast').ImageReference
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+/**
+ * @returns {string}
+ */
+declare function imageReferencePeek(): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/image-reference.js

@@ -0,0 +1,65 @@
+/**
+ * @typedef {import('mdast').ImageReference} ImageReference
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+imageReference.peek = imageReferencePeek
+
+/**
+ * @param {ImageReference} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function imageReference(node, _, state, info) {
+  const type = node.referenceType
+  const exit = state.enter('imageReference')
+  let subexit = state.enter('label')
+  const tracker = state.createTracker(info)
+  let value = tracker.move('![')
+  const alt = state.safe(node.alt, {
+    before: value,
+    after: ']',
+    ...tracker.current()
+  })
+  value += tracker.move(alt + '][')
+
+  subexit()
+  // Hide the fact that we’re in phrasing, because escapes don’t work.
+  const stack = state.stack
+  state.stack = []
+  subexit = state.enter('reference')
+  // Note: for proper tracking, we should reset the output positions when we end
+  // up making a `shortcut` reference, because then there is no brace output.
+  // Practically, in that case, there is no content, so it doesn’t matter that
+  // we’ve tracked one too many characters.
+  const reference = state.safe(state.associationId(node), {
+    before: value,
+    after: ']',
+    ...tracker.current()
+  })
+  subexit()
+  state.stack = stack
+  exit()
+
+  if (type === 'full' || !alt || alt !== reference) {
+    value += tracker.move(reference + ']')
+  } else if (type === 'shortcut') {
+    // Remove the unwanted `[`.
+    value = value.slice(0, -1)
+  } else {
+    value += tracker.move(']')
+  }
+
+  return value
+}
+
+/**
+ * @returns {string}
+ */
+function imageReferencePeek() {
+  return '!'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/image.d.ts

@@ -0,0 +1,25 @@
+/**
+ * @param {Image} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function image(
+  node: Image,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace image {
+  export {imagePeek as peek}
+}
+export type Image = import('mdast').Image
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+/**
+ * @returns {string}
+ */
+declare function imagePeek(): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/image.js

@@ -0,0 +1,84 @@
+/**
+ * @typedef {import('mdast').Image} Image
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkQuote} from '../util/check-quote.js'
+
+image.peek = imagePeek
+
+/**
+ * @param {Image} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function image(node, _, state, info) {
+  const quote = checkQuote(state)
+  const suffix = quote === '"' ? 'Quote' : 'Apostrophe'
+  const exit = state.enter('image')
+  let subexit = state.enter('label')
+  const tracker = state.createTracker(info)
+  let value = tracker.move('![')
+  value += tracker.move(
+    state.safe(node.alt, {before: value, after: ']', ...tracker.current()})
+  )
+  value += tracker.move('](')
+
+  subexit()
+
+  if (
+    // If there’s no url but there is a title…
+    (!node.url && node.title) ||
+    // If there are control characters or whitespace.
+    /[\0- \u007F]/.test(node.url)
+  ) {
+    subexit = state.enter('destinationLiteral')
+    value += tracker.move('<')
+    value += tracker.move(
+      state.safe(node.url, {before: value, after: '>', ...tracker.current()})
+    )
+    value += tracker.move('>')
+  } else {
+    // No whitespace, raw is prettier.
+    subexit = state.enter('destinationRaw')
+    value += tracker.move(
+      state.safe(node.url, {
+        before: value,
+        after: node.title ? ' ' : ')',
+        ...tracker.current()
+      })
+    )
+  }
+
+  subexit()
+
+  if (node.title) {
+    subexit = state.enter(`title${suffix}`)
+    value += tracker.move(' ' + quote)
+    value += tracker.move(
+      state.safe(node.title, {
+        before: value,
+        after: quote,
+        ...tracker.current()
+      })
+    )
+    value += tracker.move(quote)
+    subexit()
+  }
+
+  value += tracker.move(')')
+  exit()
+
+  return value
+}
+
+/**
+ * @returns {string}
+ */
+function imagePeek() {
+  return '!'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/index.d.ts

@@ -0,0 +1,41 @@
+export namespace handle {
+  export {blockquote}
+  export {hardBreak as break}
+  export {code}
+  export {definition}
+  export {emphasis}
+  export {hardBreak}
+  export {heading}
+  export {html}
+  export {image}
+  export {imageReference}
+  export {inlineCode}
+  export {link}
+  export {linkReference}
+  export {list}
+  export {listItem}
+  export {paragraph}
+  export {root}
+  export {strong}
+  export {text}
+  export {thematicBreak}
+}
+import {blockquote} from './blockquote.js'
+import {hardBreak} from './break.js'
+import {code} from './code.js'
+import {definition} from './definition.js'
+import {emphasis} from './emphasis.js'
+import {heading} from './heading.js'
+import {html} from './html.js'
+import {image} from './image.js'
+import {imageReference} from './image-reference.js'
+import {inlineCode} from './inline-code.js'
+import {link} from './link.js'
+import {linkReference} from './link-reference.js'
+import {list} from './list.js'
+import {listItem} from './list-item.js'
+import {paragraph} from './paragraph.js'
+import {root} from './root.js'
+import {strong} from './strong.js'
+import {text} from './text.js'
+import {thematicBreak} from './thematic-break.js'

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/index.js

@@ -0,0 +1,45 @@
+import {blockquote} from './blockquote.js'
+import {hardBreak} from './break.js'
+import {code} from './code.js'
+import {definition} from './definition.js'
+import {emphasis} from './emphasis.js'
+import {heading} from './heading.js'
+import {html} from './html.js'
+import {image} from './image.js'
+import {imageReference} from './image-reference.js'
+import {inlineCode} from './inline-code.js'
+import {link} from './link.js'
+import {linkReference} from './link-reference.js'
+import {list} from './list.js'
+import {listItem} from './list-item.js'
+import {paragraph} from './paragraph.js'
+import {root} from './root.js'
+import {strong} from './strong.js'
+import {text} from './text.js'
+import {thematicBreak} from './thematic-break.js'
+
+/**
+ * Default (CommonMark) handlers.
+ */
+export const handle = {
+  blockquote,
+  break: hardBreak,
+  code,
+  definition,
+  emphasis,
+  hardBreak,
+  heading,
+  html,
+  image,
+  imageReference,
+  inlineCode,
+  link,
+  linkReference,
+  list,
+  listItem,
+  paragraph,
+  root,
+  strong,
+  text,
+  thematicBreak
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/inline-code.d.ts

@@ -0,0 +1,22 @@
+/**
+ * @param {InlineCode} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @returns {string}
+ */
+export function inlineCode(
+  node: InlineCode,
+  _: Parent | undefined,
+  state: State
+): string
+export namespace inlineCode {
+  export {inlineCodePeek as peek}
+}
+export type InlineCode = import('mdast').InlineCode
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+/**
+ * @returns {string}
+ */
+declare function inlineCodePeek(): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/inline-code.js

@@ -0,0 +1,79 @@
+/**
+ * @typedef {import('mdast').InlineCode} InlineCode
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ */
+
+import {patternCompile} from '../util/pattern-compile.js'
+
+inlineCode.peek = inlineCodePeek
+
+/**
+ * @param {InlineCode} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @returns {string}
+ */
+export function inlineCode(node, _, state) {
+  let value = node.value || ''
+  let sequence = '`'
+  let index = -1
+
+  // If there is a single grave accent on its own in the code, use a fence of
+  // two.
+  // If there are two in a row, use one.
+  while (new RegExp('(^|[^`])' + sequence + '([^`]|$)').test(value)) {
+    sequence += '`'
+  }
+
+  // If this is not just spaces or eols (tabs don’t count), and either the
+  // first or last character are a space, eol, or tick, then pad with spaces.
+  if (
+    /[^ \r\n]/.test(value) &&
+    ((/^[ \r\n]/.test(value) && /[ \r\n]$/.test(value)) || /^`|`$/.test(value))
+  ) {
+    value = ' ' + value + ' '
+  }
+
+  // We have a potential problem: certain characters after eols could result in
+  // blocks being seen.
+  // For example, if someone injected the string `'\n# b'`, then that would
+  // result in an ATX heading.
+  // We can’t escape characters in `inlineCode`, but because eols are
+  // transformed to spaces when going from markdown to HTML anyway, we can swap
+  // them out.
+  while (++index < state.unsafe.length) {
+    const pattern = state.unsafe[index]
+    const expression = patternCompile(pattern)
+    /** @type {RegExpExecArray | null} */
+    let match
+
+    // Only look for `atBreak`s.
+    // Btw: note that `atBreak` patterns will always start the regex at LF or
+    // CR.
+    if (!pattern.atBreak) continue
+
+    while ((match = expression.exec(value))) {
+      let position = match.index
+
+      // Support CRLF (patterns only look for one of the characters).
+      if (
+        value.charCodeAt(position) === 10 /* `\n` */ &&
+        value.charCodeAt(position - 1) === 13 /* `\r` */
+      ) {
+        position--
+      }
+
+      value = value.slice(0, position) + ' ' + value.slice(match.index + 1)
+    }
+  }
+
+  return sequence + value + sequence
+}
+
+/**
+ * @returns {string}
+ */
+function inlineCodePeek() {
+  return '`'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/link-reference.d.ts

@@ -0,0 +1,25 @@
+/**
+ * @param {LinkReference} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function linkReference(
+  node: LinkReference,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace linkReference {
+  export {linkReferencePeek as peek}
+}
+export type LinkReference = import('mdast').LinkReference
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+/**
+ * @returns {string}
+ */
+declare function linkReferencePeek(): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/link-reference.js

@@ -0,0 +1,65 @@
+/**
+ * @typedef {import('mdast').LinkReference} LinkReference
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+linkReference.peek = linkReferencePeek
+
+/**
+ * @param {LinkReference} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function linkReference(node, _, state, info) {
+  const type = node.referenceType
+  const exit = state.enter('linkReference')
+  let subexit = state.enter('label')
+  const tracker = state.createTracker(info)
+  let value = tracker.move('[')
+  const text = state.containerPhrasing(node, {
+    before: value,
+    after: ']',
+    ...tracker.current()
+  })
+  value += tracker.move(text + '][')
+
+  subexit()
+  // Hide the fact that we’re in phrasing, because escapes don’t work.
+  const stack = state.stack
+  state.stack = []
+  subexit = state.enter('reference')
+  // Note: for proper tracking, we should reset the output positions when we end
+  // up making a `shortcut` reference, because then there is no brace output.
+  // Practically, in that case, there is no content, so it doesn’t matter that
+  // we’ve tracked one too many characters.
+  const reference = state.safe(state.associationId(node), {
+    before: value,
+    after: ']',
+    ...tracker.current()
+  })
+  subexit()
+  state.stack = stack
+  exit()
+
+  if (type === 'full' || !text || text !== reference) {
+    value += tracker.move(reference + ']')
+  } else if (type === 'shortcut') {
+    // Remove the unwanted `[`.
+    value = value.slice(0, -1)
+  } else {
+    value += tracker.move(']')
+  }
+
+  return value
+}
+
+/**
+ * @returns {string}
+ */
+function linkReferencePeek() {
+  return '['
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/link.d.ts

@@ -0,0 +1,33 @@
+/**
+ * @param {Link} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function link(
+  node: Link,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace link {
+  export {linkPeek as peek}
+}
+export type Link = import('mdast').Link
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+export type Exit = import('../types.js').Exit
+/**
+ * @param {Link} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @returns {string}
+ */
+declare function linkPeek(
+  node: Link,
+  _: Parent | undefined,
+  state: State
+): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/link.js

@@ -0,0 +1,116 @@
+/**
+ * @typedef {import('mdast').Link} Link
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Exit} Exit
+ */
+
+import {checkQuote} from '../util/check-quote.js'
+import {formatLinkAsAutolink} from '../util/format-link-as-autolink.js'
+
+link.peek = linkPeek
+
+/**
+ * @param {Link} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function link(node, _, state, info) {
+  const quote = checkQuote(state)
+  const suffix = quote === '"' ? 'Quote' : 'Apostrophe'
+  const tracker = state.createTracker(info)
+  /** @type {Exit} */
+  let exit
+  /** @type {Exit} */
+  let subexit
+
+  if (formatLinkAsAutolink(node, state)) {
+    // Hide the fact that we’re in phrasing, because escapes don’t work.
+    const stack = state.stack
+    state.stack = []
+    exit = state.enter('autolink')
+    let value = tracker.move('<')
+    value += tracker.move(
+      state.containerPhrasing(node, {
+        before: value,
+        after: '>',
+        ...tracker.current()
+      })
+    )
+    value += tracker.move('>')
+    exit()
+    state.stack = stack
+    return value
+  }
+
+  exit = state.enter('link')
+  subexit = state.enter('label')
+  let value = tracker.move('[')
+  value += tracker.move(
+    state.containerPhrasing(node, {
+      before: value,
+      after: '](',
+      ...tracker.current()
+    })
+  )
+  value += tracker.move('](')
+  subexit()
+
+  if (
+    // If there’s no url but there is a title…
+    (!node.url && node.title) ||
+    // If there are control characters or whitespace.
+    /[\0- \u007F]/.test(node.url)
+  ) {
+    subexit = state.enter('destinationLiteral')
+    value += tracker.move('<')
+    value += tracker.move(
+      state.safe(node.url, {before: value, after: '>', ...tracker.current()})
+    )
+    value += tracker.move('>')
+  } else {
+    // No whitespace, raw is prettier.
+    subexit = state.enter('destinationRaw')
+    value += tracker.move(
+      state.safe(node.url, {
+        before: value,
+        after: node.title ? ' ' : ')',
+        ...tracker.current()
+      })
+    )
+  }
+
+  subexit()
+
+  if (node.title) {
+    subexit = state.enter(`title${suffix}`)
+    value += tracker.move(' ' + quote)
+    value += tracker.move(
+      state.safe(node.title, {
+        before: value,
+        after: quote,
+        ...tracker.current()
+      })
+    )
+    value += tracker.move(quote)
+    subexit()
+  }
+
+  value += tracker.move(')')
+
+  exit()
+  return value
+}
+
+/**
+ * @param {Link} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @returns {string}
+ */
+function linkPeek(node, _, state) {
+  return formatLinkAsAutolink(node, state) ? '<' : '['
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/list-item.d.ts

@@ -0,0 +1,18 @@
+/**
+ * @param {ListItem} node
+ * @param {Parent | undefined} parent
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function listItem(
+  node: ListItem,
+  parent: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type ListItem = import('mdast').ListItem
+export type Map = import('../types.js').Map
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/list-item.js

@@ -0,0 +1,65 @@
+/**
+ * @typedef {import('mdast').ListItem} ListItem
+ * @typedef {import('../types.js').Map} Map
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkBullet} from '../util/check-bullet.js'
+import {checkListItemIndent} from '../util/check-list-item-indent.js'
+
+/**
+ * @param {ListItem} node
+ * @param {Parent | undefined} parent
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function listItem(node, parent, state, info) {
+  const listItemIndent = checkListItemIndent(state)
+  let bullet = state.bulletCurrent || checkBullet(state)
+
+  // Add the marker value for ordered lists.
+  if (parent && parent.type === 'list' && parent.ordered) {
+    bullet =
+      (typeof parent.start === 'number' && parent.start > -1
+        ? parent.start
+        : 1) +
+      (state.options.incrementListMarker === false
+        ? 0
+        : parent.children.indexOf(node)) +
+      bullet
+  }
+
+  let size = bullet.length + 1
+
+  if (
+    listItemIndent === 'tab' ||
+    (listItemIndent === 'mixed' &&
+      ((parent && parent.type === 'list' && parent.spread) || node.spread))
+  ) {
+    size = Math.ceil(size / 4) * 4
+  }
+
+  const tracker = state.createTracker(info)
+  tracker.move(bullet + ' '.repeat(size - bullet.length))
+  tracker.shift(size)
+  const exit = state.enter('listItem')
+  const value = state.indentLines(
+    state.containerFlow(node, tracker.current()),
+    map
+  )
+  exit()
+
+  return value
+
+  /** @type {Map} */
+  function map(line, index, blank) {
+    if (index) {
+      return (blank ? '' : ' '.repeat(size)) + line
+    }
+
+    return (blank ? bullet : bullet + ' '.repeat(size - bullet.length)) + line
+  }
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/list.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @param {List} node
+ * @param {Parent | undefined} parent
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function list(
+  node: List,
+  parent: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type List = import('mdast').List
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/list.js

@@ -0,0 +1,113 @@
+/**
+ * @typedef {import('mdast').List} List
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkBullet} from '../util/check-bullet.js'
+import {checkBulletOther} from '../util/check-bullet-other.js'
+import {checkBulletOrdered} from '../util/check-bullet-ordered.js'
+import {checkBulletOrderedOther} from '../util/check-bullet-ordered-other.js'
+import {checkRule} from '../util/check-rule.js'
+
+/**
+ * @param {List} node
+ * @param {Parent | undefined} parent
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function list(node, parent, state, info) {
+  const exit = state.enter('list')
+  const bulletCurrent = state.bulletCurrent
+  /** @type {string} */
+  let bullet = node.ordered ? checkBulletOrdered(state) : checkBullet(state)
+  /** @type {string} */
+  const bulletOther = node.ordered
+    ? checkBulletOrderedOther(state)
+    : checkBulletOther(state)
+  const bulletLastUsed = state.bulletLastUsed
+  let useDifferentMarker = false
+
+  if (
+    parent &&
+    // Explicit `other` set.
+    (node.ordered
+      ? state.options.bulletOrderedOther
+      : state.options.bulletOther) &&
+    bulletLastUsed &&
+    bullet === bulletLastUsed
+  ) {
+    useDifferentMarker = true
+  }
+
+  if (!node.ordered) {
+    const firstListItem = node.children ? node.children[0] : undefined
+
+    // If there’s an empty first list item directly in two list items,
+    // we have to use a different bullet:
+    //
+    // ```markdown
+    // * - *
+    // ```
+    //
+    // …because otherwise it would become one big thematic break.
+    if (
+      // Bullet could be used as a thematic break marker:
+      (bullet === '*' || bullet === '-') &&
+      // Empty first list item:
+      firstListItem &&
+      (!firstListItem.children || !firstListItem.children[0]) &&
+      // Directly in two other list items:
+      state.stack[state.stack.length - 1] === 'list' &&
+      state.stack[state.stack.length - 2] === 'listItem' &&
+      state.stack[state.stack.length - 3] === 'list' &&
+      state.stack[state.stack.length - 4] === 'listItem' &&
+      // That are each the first child.
+      state.indexStack[state.indexStack.length - 1] === 0 &&
+      state.indexStack[state.indexStack.length - 2] === 0 &&
+      state.indexStack[state.indexStack.length - 3] === 0
+    ) {
+      useDifferentMarker = true
+    }
+
+    // If there’s a thematic break at the start of the first list item,
+    // we have to use a different bullet:
+    //
+    // ```markdown
+    // * ---
+    // ```
+    //
+    // …because otherwise it would become one big thematic break.
+    if (checkRule(state) === bullet && firstListItem) {
+      let index = -1
+
+      while (++index < node.children.length) {
+        const item = node.children[index]
+
+        if (
+          item &&
+          item.type === 'listItem' &&
+          item.children &&
+          item.children[0] &&
+          item.children[0].type === 'thematicBreak'
+        ) {
+          useDifferentMarker = true
+          break
+        }
+      }
+    }
+  }
+
+  if (useDifferentMarker) {
+    bullet = bulletOther
+  }
+
+  state.bulletCurrent = bullet
+  const value = state.containerFlow(node, info)
+  state.bulletLastUsed = bullet
+  state.bulletCurrent = bulletCurrent
+  exit()
+  return value
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/paragraph.d.ts

@@ -0,0 +1,23 @@
+/**
+ * @typedef {import('mdast').Paragraph} Paragraph
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+/**
+ * @param {Paragraph} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function paragraph(
+  node: Paragraph,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Paragraph = import('mdast').Paragraph
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/paragraph.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('mdast').Paragraph} Paragraph
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+/**
+ * @param {Paragraph} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function paragraph(node, _, state, info) {
+  const exit = state.enter('paragraph')
+  const subexit = state.enter('phrasing')
+  const value = state.containerPhrasing(node, info)
+  subexit()
+  exit()
+  return value
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/root.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @param {Root} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function root(
+  node: Root,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Root = import('mdast').Root
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/root.js

@@ -0,0 +1,23 @@
+/**
+ * @typedef {import('mdast').Root} Root
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {phrasing} from 'mdast-util-phrasing'
+
+/**
+ * @param {Root} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function root(node, _, state, info) {
+  // Note: `html` nodes are ambiguous.
+  const hasPhrasing = node.children.some((d) => phrasing(d))
+  const fn = hasPhrasing ? state.containerPhrasing : state.containerFlow
+  // @ts-expect-error: `root`s are supposed to have one type of content
+  return fn.call(state, node, info)
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/strong.d.ts

@@ -0,0 +1,32 @@
+/**
+ * @param {Strong} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function strong(
+  node: Strong,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export namespace strong {
+  export {strongPeek as peek}
+}
+export type Strong = import('mdast').Strong
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info
+/**
+ * @param {Strong} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+declare function strongPeek(
+  _: Strong,
+  _1: Parent | undefined,
+  state: State
+): string
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/strong.js

@@ -0,0 +1,48 @@
+/**
+ * @typedef {import('mdast').Strong} Strong
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+import {checkStrong} from '../util/check-strong.js'
+
+strong.peek = strongPeek
+
+// To do: there are cases where emphasis cannot “form” depending on the
+// previous or next character of sequences.
+// There’s no way around that though, except for injecting zero-width stuff.
+// Do we need to safeguard against that?
+/**
+ * @param {Strong} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function strong(node, _, state, info) {
+  const marker = checkStrong(state)
+  const exit = state.enter('strong')
+  const tracker = state.createTracker(info)
+  let value = tracker.move(marker + marker)
+  value += tracker.move(
+    state.containerPhrasing(node, {
+      before: value,
+      after: marker,
+      ...tracker.current()
+    })
+  )
+  value += tracker.move(marker + marker)
+  exit()
+  return value
+}
+
+/**
+ * @param {Strong} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+function strongPeek(_, _1, state) {
+  return state.options.strong || '*'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/text.d.ts

@@ -0,0 +1,23 @@
+/**
+ * @typedef {import('mdast').Text} Text
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+/**
+ * @param {Text} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function text(
+  node: Text,
+  _: Parent | undefined,
+  state: State,
+  info: Info
+): string
+export type Text = import('mdast').Text
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type Info = import('../types.js').Info

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/text.js

@@ -0,0 +1,17 @@
+/**
+ * @typedef {import('mdast').Text} Text
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Info} Info
+ */
+
+/**
+ * @param {Text} node
+ * @param {Parent | undefined} _
+ * @param {State} state
+ * @param {Info} info
+ * @returns {string}
+ */
+export function text(node, _, state, info) {
+  return state.safe(node.value, info)
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/thematic-break.d.ts

@@ -0,0 +1,14 @@
+/**
+ * @param {ThematicBreak} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+export function thematicBreak(
+  _: ThematicBreak,
+  _1: Parent | undefined,
+  state: State
+): string
+export type ThematicBreak = import('mdast').ThematicBreak
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/handle/thematic-break.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('mdast').ThematicBreak} ThematicBreak
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ */
+
+import {checkRuleRepetition} from '../util/check-rule-repetition.js'
+import {checkRule} from '../util/check-rule.js'
+
+/**
+ * @param {ThematicBreak} _
+ * @param {Parent | undefined} _1
+ * @param {State} state
+ * @returns {string}
+ */
+export function thematicBreak(_, _1, state) {
+  const value = (
+    checkRule(state) + (state.options.ruleSpaces ? ' ' : '')
+  ).repeat(checkRuleRepetition(state))
+
+  return state.options.ruleSpaces ? value.slice(0, -1) : value
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/index.d.ts

@@ -0,0 +1,25 @@
+/**
+ * Turn an mdast syntax tree into markdown.
+ *
+ * @param {Node} tree
+ *   Tree to serialize.
+ * @param {Options} [options]
+ *   Configuration (optional).
+ * @returns {string}
+ *   Serialized markdown representing `tree`.
+ */
+export function toMarkdown(
+  tree: Node,
+  options?: import('./types.js').Options | undefined
+): string
+export type Enter = import('./types.js').Enter
+export type Info = import('./types.js').Info
+export type Join = import('./types.js').Join
+export type FlowContent = import('./types.js').FlowContent
+export type Node = import('./types.js').Node
+export type Options = import('./types.js').Options
+export type Parent = import('./types.js').Parent
+export type PhrasingContent = import('./types.js').PhrasingContent
+export type SafeConfig = import('./types.js').SafeConfig
+export type State = import('./types.js').State
+export type TrackFields = import('./types.js').TrackFields

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/index.js

@@ -0,0 +1,188 @@
+/**
+ * @typedef {import('./types.js').Enter} Enter
+ * @typedef {import('./types.js').Info} Info
+ * @typedef {import('./types.js').Join} Join
+ * @typedef {import('./types.js').FlowContent} FlowContent
+ * @typedef {import('./types.js').Node} Node
+ * @typedef {import('./types.js').Options} Options
+ * @typedef {import('./types.js').Parent} Parent
+ * @typedef {import('./types.js').PhrasingContent} PhrasingContent
+ * @typedef {import('./types.js').SafeConfig} SafeConfig
+ * @typedef {import('./types.js').State} State
+ * @typedef {import('./types.js').TrackFields} TrackFields
+ */
+
+import {zwitch} from 'zwitch'
+import {configure} from './configure.js'
+import {handle as handlers} from './handle/index.js'
+import {join} from './join.js'
+import {unsafe} from './unsafe.js'
+import {association} from './util/association.js'
+import {containerPhrasing} from './util/container-phrasing.js'
+import {containerFlow} from './util/container-flow.js'
+import {indentLines} from './util/indent-lines.js'
+import {safe} from './util/safe.js'
+import {track} from './util/track.js'
+
+/**
+ * Turn an mdast syntax tree into markdown.
+ *
+ * @param {Node} tree
+ *   Tree to serialize.
+ * @param {Options} [options]
+ *   Configuration (optional).
+ * @returns {string}
+ *   Serialized markdown representing `tree`.
+ */
+export function toMarkdown(tree, options = {}) {
+  /** @type {State} */
+  const state = {
+    enter,
+    indentLines,
+    associationId: association,
+    containerPhrasing: containerPhrasingBound,
+    containerFlow: containerFlowBound,
+    createTracker: track,
+    safe: safeBound,
+    stack: [],
+    unsafe: [],
+    join: [],
+    // @ts-expect-error: we’ll fill it next.
+    handlers: {},
+    options: {},
+    indexStack: [],
+    // @ts-expect-error: we’ll add `handle` later.
+    handle: undefined
+  }
+
+  configure(state, {unsafe, join, handlers})
+  configure(state, options)
+
+  if (state.options.tightDefinitions) {
+    configure(state, {join: [joinDefinition]})
+  }
+
+  state.handle = zwitch('type', {
+    invalid,
+    unknown,
+    handlers: state.handlers
+  })
+
+  let result = state.handle(tree, undefined, state, {
+    before: '\n',
+    after: '\n',
+    now: {line: 1, column: 1},
+    lineShift: 0
+  })
+
+  if (
+    result &&
+    result.charCodeAt(result.length - 1) !== 10 &&
+    result.charCodeAt(result.length - 1) !== 13
+  ) {
+    result += '\n'
+  }
+
+  return result
+
+  /** @type {Enter} */
+  function enter(name) {
+    state.stack.push(name)
+    return exit
+
+    function exit() {
+      state.stack.pop()
+    }
+  }
+}
+
+/**
+ * @param {unknown} value
+ * @returns {never}
+ */
+function invalid(value) {
+  throw new Error('Cannot handle value `' + value + '`, expected node')
+}
+
+/**
+ * @param {unknown} node
+ * @returns {never}
+ */
+function unknown(node) {
+  // @ts-expect-error: fine.
+  throw new Error('Cannot handle unknown node `' + node.type + '`')
+}
+
+/** @type {Join} */
+function joinDefinition(left, right) {
+  // No blank line between adjacent definitions.
+  if (left.type === 'definition' && left.type === right.type) {
+    return 0
+  }
+}
+
+/**
+ * Serialize the children of a parent that contains phrasing children.
+ *
+ * These children will be joined flush together.
+ *
+ * @this {State}
+ *   Info passed around about the current state.
+ * @param {Parent & {children: Array<PhrasingContent>}} parent
+ *   Parent of flow nodes.
+ * @param {Info} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined together.
+ */
+function containerPhrasingBound(parent, info) {
+  return containerPhrasing(parent, this, info)
+}
+
+/**
+ * Serialize the children of a parent that contains flow children.
+ *
+ * These children will typically be joined by blank lines.
+ * What they are joined by exactly is defined by `Join` functions.
+ *
+ * @this {State}
+ *   Info passed around about the current state.
+ * @param {Parent & {children: Array<FlowContent>}} parent
+ *   Parent of flow nodes.
+ * @param {TrackFields} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined by (blank) lines.
+ */
+function containerFlowBound(parent, info) {
+  return containerFlow(parent, this, info)
+}
+
+/**
+ * Make a string safe for embedding in markdown constructs.
+ *
+ * In markdown, almost all punctuation characters can, in certain cases,
+ * result in something.
+ * Whether they do is highly subjective to where they happen and in what
+ * they happen.
+ *
+ * To solve this, `mdast-util-to-markdown` tracks:
+ *
+ * * Characters before and after something;
+ * * What “constructs” we are in.
+ *
+ * This information is then used by this function to escape or encode
+ * special characters.
+ *
+ * @this {State}
+ *   Info passed around about the current state.
+ * @param {string | null | undefined} value
+ *   Raw value to make safe.
+ * @param {SafeConfig} config
+ *   Configuration.
+ * @returns {string}
+ *   Serialized markdown safe for embedding.
+ */
+function safeBound(value, config) {
+  return safe(this, value, config)
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/join.d.ts

@@ -0,0 +1,3 @@
+/** @type {Array<Join>} */
+export const join: Array<Join>
+export type Join = import('./types.js').Join

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/join.js

@@ -0,0 +1,51 @@
+/**
+ * @typedef {import('./types.js').Join} Join
+ */
+
+import {formatCodeAsIndented} from './util/format-code-as-indented.js'
+import {formatHeadingAsSetext} from './util/format-heading-as-setext.js'
+
+/** @type {Array<Join>} */
+export const join = [joinDefaults]
+
+/** @type {Join} */
+function joinDefaults(left, right, parent, state) {
+  // Indented code after list or another indented code.
+  if (
+    right.type === 'code' &&
+    formatCodeAsIndented(right, state) &&
+    (left.type === 'list' ||
+      (left.type === right.type && formatCodeAsIndented(left, state)))
+  ) {
+    return false
+  }
+
+  // Two lists with the same marker.
+  if (
+    left.type === 'list' &&
+    left.type === right.type &&
+    Boolean(left.ordered) === Boolean(right.ordered) &&
+    !(left.ordered
+      ? state.options.bulletOrderedOther
+      : state.options.bulletOther)
+  ) {
+    return false
+  }
+
+  // Join children of a list or an item.
+  // In which case, `parent` has a `spread` field.
+  if ('spread' in parent && typeof parent.spread === 'boolean') {
+    if (
+      left.type === 'paragraph' &&
+      // Two paragraphs.
+      (left.type === right.type ||
+        right.type === 'definition' ||
+        // Paragraph followed by a setext heading.
+        (right.type === 'heading' && formatHeadingAsSetext(right, state)))
+    ) {
+      return
+    }
+
+    return parent.spread ? 1 : 0
+  }
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/types.d.ts

@@ -0,0 +1,466 @@
+export type UnistParent = import('unist').Parent
+export type Point = import('unist').Point
+export type Association = import('mdast').Association
+export type Content = import('mdast').Content
+export type ListContent = import('mdast').ListContent
+export type PhrasingContent = import('mdast').PhrasingContent
+export type Root = import('mdast').Root
+export type TopLevelContent = import('mdast').TopLevelContent
+export type ConstructName = import('../index.js').ConstructName
+export type Node = Root | Content
+export type Parent = Extract<Node, UnistParent>
+export type FlowContent = TopLevelContent | ListContent
+/**
+ * Info on where we are in the document we are generating.
+ */
+export type TrackFields = {
+  /**
+   * Current point.
+   */
+  now: Point
+  /**
+   * Number of columns each line will be shifted by wrapping nodes.
+   */
+  lineShift: number
+}
+/**
+ * Info on the characters that are around the current thing we are
+ * generating.
+ */
+export type SafeFields = {
+  /**
+   * Characters before this (guaranteed to be one, can be more).
+   */
+  before: string
+  /**
+   * Characters after this (guaranteed to be one, can be more).
+   */
+  after: string
+}
+/**
+ * Info on the surrounding of the node that is serialized.
+ */
+export type Info = TrackFields & SafeFields
+/**
+ * Get current tracked info.
+ */
+export type TrackCurrent = () => TrackFields
+/**
+ * Define a relative increased line shift (the typical indent for lines).
+ */
+export type TrackShift = (value: number) => void
+/**
+ * Move past some generated markdown.
+ */
+export type TrackMove = (value: string | null | undefined) => string
+/**
+ * Track positional info in the output.
+ *
+ * This info isn’t used yet but such functionality will allow line wrapping,
+ * source maps, etc.
+ */
+export type Tracker = {
+  /**
+   * Get the current tracked info.
+   */
+  current: TrackCurrent
+  /**
+   * Define an increased line shift (the typical indent for lines).
+   */
+  shift: TrackShift
+  /**
+   * Move past some generated markdown.
+   */
+  move: TrackMove
+}
+/**
+ * Track positional info in the output.
+ *
+ * This info isn’t used yet but such functionality will allow line wrapping,
+ * source maps, etc.
+ */
+export type CreateTracker = (info: TrackFields) => Tracker
+/**
+ * Get an identifier from an association to match it to others.
+ *
+ * Associations are nodes that match to something else through an ID:
+ * <https://github.com/syntax-tree/mdast#association>.
+ *
+ * The `label` of an association is the string value: character escapes and
+ * references work, and casing is intact.
+ * The `identifier` is used to match one association to another:
+ * controversially, character escapes and references don’t work in this
+ * matching: `&copy;` does not match `©`, and `\+` does not match `+`.
+ *
+ * But casing is ignored (and whitespace) is trimmed and collapsed: ` A\nb`
+ * matches `a b`.
+ * So, we do prefer the label when figuring out how we’re going to serialize:
+ * it has whitespace, casing, and we can ignore most useless character
+ * escapes and all character references.
+ */
+export type AssociationId = (node: Association) => string
+/**
+ * Map function to pad a single line.
+ */
+export type Map = (value: string, line: number, blank: boolean) => string
+/**
+ * Pad serialized markdown.
+ */
+export type IndentLines = (value: string, map: Map) => string
+/**
+ * Serialize the children of a parent that contains phrasing children.
+ *
+ * These children will be joined flush together.
+ */
+export type ContainerPhrasing = (
+  parent: Parent & {
+    children: Array<PhrasingContent>
+  },
+  info: Info
+) => string
+/**
+ * Serialize the children of a parent that contains flow children.
+ *
+ * These children will typically be joined by blank lines.
+ * What they are joined by exactly is defined by `Join` functions.
+ */
+export type ContainerFlow = (
+  parent: Parent & {
+    children: Array<FlowContent>
+  },
+  info: TrackFields
+) => string
+/**
+ * Extra configuration for `safe`
+ */
+export type SafeEncodeFields = {
+  /**
+   * Extra characters that *must* be encoded (as character references) instead
+   * of escaped (character escapes).
+   *
+   * Only ASCII punctuation will use character escapes, so you never need to
+   * pass non-ASCII-punctuation here.
+   */
+  encode?: Array<string> | null | undefined
+}
+export type SafeConfig = SafeFields & SafeEncodeFields
+/**
+ * Make a string safe for embedding in markdown constructs.
+ *
+ * In markdown, almost all punctuation characters can, in certain cases,
+ * result in something.
+ * Whether they do is highly subjective to where they happen and in what
+ * they happen.
+ *
+ * To solve this, `mdast-util-to-markdown` tracks:
+ *
+ * * Characters before and after something;
+ * * What “constructs” we are in.
+ *
+ * This information is then used by this function to escape or encode
+ * special characters.
+ */
+export type Safe = (
+  input: string | null | undefined,
+  config: SafeConfig
+) => string
+/**
+ * Enter something.
+ */
+export type Enter = (name: ConstructName) => Exit
+/**
+ * Exit something.
+ */
+export type Exit = () => void
+/**
+ * Info passed around about the current state.
+ */
+export type State = {
+  /**
+   * Stack of constructs we’re in.
+   */
+  stack: Array<ConstructName>
+  /**
+   * Positions of child nodes in their parents.
+   */
+  indexStack: Array<number>
+  /**
+   * Pad serialized markdown.
+   */
+  indentLines: IndentLines
+  /**
+   * Get an identifier from an association to match it to others.
+   */
+  associationId: AssociationId
+  /**
+   * Serialize the children of a parent that contains phrasing children.
+   */
+  containerPhrasing: ContainerPhrasing
+  /**
+   * Serialize the children of a parent that contains flow children.
+   */
+  containerFlow: ContainerFlow
+  /**
+   * Track positional info in the output.
+   */
+  createTracker: CreateTracker
+  /**
+   * Serialize the children of a parent that contains flow children.
+   */
+  safe: Safe
+  /**
+   * Enter a construct (returns a corresponding exit function).
+   */
+  enter: Enter
+  /**
+   * Applied user configuration.
+   */
+  options: Options
+  /**
+   * Applied unsafe patterns.
+   */
+  unsafe: Array<Unsafe>
+  /**
+   * Applied join handlers.
+   */
+  join: Array<Join>
+  /**
+   * Call the configured handler for the given node.
+   */
+  handle: Handle
+  /**
+   * Applied handlers.
+   */
+  handlers: Handlers
+  /**
+   * List marker currently in use.
+   */
+  bulletCurrent: string | undefined
+  /**
+   * List marker previously in use.
+   */
+  bulletLastUsed: string | undefined
+}
+/**
+ * Handle a particular node.
+ */
+export type Handle = (
+  node: any,
+  parent: Parent | undefined,
+  state: State,
+  Info: Info
+) => string
+/**
+ * Handle particular nodes.
+ *
+ * Each key is a node type, each value its corresponding handler.
+ */
+export type Handlers = Record<Node['type'], Handle>
+/**
+ * How to join two blocks.
+ *
+ * “Blocks” are typically joined by one blank line.
+ * Sometimes it’s nicer to have them flush next to each other, yet other
+ * times they cannot occur together at all.
+ *
+ * Join functions receive two adjacent siblings and their parent and what
+ * they return defines how many blank lines to use between them.
+ */
+export type Join = (
+  left: Node,
+  right: Node,
+  parent: Parent,
+  state: State
+) => boolean | null | undefined | void | number
+/**
+ * Schema that defines when a character cannot occur.
+ */
+export type Unsafe = {
+  /**
+   * Single unsafe character.
+   */
+  character: string
+  /**
+   * Constructs where this is bad.
+   */
+  inConstruct?: ConstructName | Array<ConstructName> | null | undefined
+  /**
+   * Constructs where this is fine again.
+   */
+  notInConstruct?: ConstructName | Array<ConstructName> | null | undefined
+  /**
+   * `character` is bad when this is before it (cannot be used together with
+   * `atBreak`).
+   */
+  before?: string | null | undefined
+  /**
+   * `character` is bad when this is after it.
+   */
+  after?: string | null | undefined
+  /**
+   * `character` is bad at a break (cannot be used together with `before`).
+   */
+  atBreak?: boolean | null | undefined
+  /**
+   * The unsafe pattern (this whole object) compiled as a regex.
+   *
+   * This is internal and must not be defined.
+   */
+  _compiled?: RegExp | null | undefined
+}
+/**
+ * Configuration (optional).
+ */
+export type Options = {
+  /**
+   * Marker to use for bullets of items in unordered lists.
+   */
+  bullet?: '-' | '*' | '+' | null | undefined
+  /**
+   * Marker to use in certain cases where the primary bullet doesn’t work.
+   *
+   * There are three cases where the primary bullet cannot be used:
+   *
+   * *   When three list items are on their own, the last one is empty, and
+   * `bullet` is also a valid `rule`: `* - +`.
+   * This would turn into a thematic break if serialized with three primary
+   * bullets.
+   * As this is an edge case unlikely to appear in normal markdown, the
+   * last list item will be given a different bullet.
+   * *   When a thematic break is the first child of one of the list items, and
+   * `bullet` is the same character as `rule`: `- ***`.
+   * This would turn into a single thematic break if serialized with
+   * primary bullets.
+   * As this is an edge case unlikely to appear in normal markdown this
+   * markup is always fixed, even if `bulletOther` is not passed
+   * *   When two unordered lists appear next to each other: `* a\n- b`.
+   * CommonMark sees different bullets as different lists, but several
+   * markdown parsers parse it as one list.
+   * To solve for both, we instead inject an empty comment between the two
+   * lists: `* a\n<!---->\n* b`, but if `bulletOther` is given explicitly,
+   * it will be used instead
+   */
+  bulletOther?: '-' | '*' | '+' | null | undefined
+  /**
+   * Marker to use for bullets of items in ordered lists.
+   */
+  bulletOrdered?: '.' | ')' | null | undefined
+  /**
+   * Marker to use in certain cases where the primary bullet for ordered items
+   * doesn’t work.
+   *
+   * There is one case where the primary bullet for ordered items cannot be used:
+   *
+   * *   When two ordered lists appear next to each other: `1. a\n2) b`.
+   * CommonMark added support for `)` as a marker, but other markdown
+   * parsers do not support it.
+   * To solve for both, we instead inject an empty comment between the two
+   * lists: `1. a\n<!---->\n1. b`, but if `bulletOrderedOther` is given
+   * explicitly, it will be used instead
+   */
+  bulletOrderedOther?: '.' | ')' | null | undefined
+  /**
+   * Whether to add the same number of number signs (`#`) at the end of an ATX
+   * heading as the opening sequence.
+   */
+  closeAtx?: boolean | null | undefined
+  /**
+   * Marker to use for emphasis.
+   */
+  emphasis?: '_' | '*' | null | undefined
+  /**
+   * Marker to use for fenced code.
+   */
+  fence?: '~' | '`' | null | undefined
+  /**
+   * Whether to use fenced code always.
+   *
+   * The default is to use fenced code if there is a language defined, if the
+   * code is empty, or if it starts or ends in blank lines.
+   */
+  fences?: boolean | null | undefined
+  /**
+   * Whether to increment the counter of ordered lists items.
+   */
+  incrementListMarker?: boolean | null | undefined
+  /**
+   * How to indent the content of list items.
+   *
+   * Either with the size of the bullet plus one space (when `'one'`), a tab
+   * stop (`'tab'`), or depending on the item and its parent list (`'mixed'`,
+   * uses `'one'` if the item and list are tight and `'tab'` otherwise).
+   */
+  listItemIndent?: 'tab' | 'one' | 'mixed' | null | undefined
+  /**
+   * Marker to use for titles.
+   */
+  quote?: '"' | "'" | null | undefined
+  /**
+   * Whether to always use resource links.
+   *
+   * The default is to use autolinks (`<https://example.com>`) when possible
+   * and resource links (`[text](url)`) otherwise.
+   */
+  resourceLink?: boolean | null | undefined
+  /**
+   * Marker to use for thematic breaks.
+   */
+  rule?: '-' | '_' | '*' | null | undefined
+  /**
+   * Number of markers to use for thematic breaks.
+   */
+  ruleRepetition?: number | null | undefined
+  /**
+   * Whether to add spaces between markers in thematic breaks.
+   */
+  ruleSpaces?: boolean | null | undefined
+  /**
+   * Whether to use setext headings when possible.
+   *
+   * The default is to always use ATX headings (`# heading`) instead of setext
+   * headings (`heading\n=======`).
+   * Setext headings cannot be used for empty headings or headings with a rank
+   * of three or more.
+   */
+  setext?: boolean | null | undefined
+  /**
+   * Marker to use for strong.
+   */
+  strong?: '_' | '*' | null | undefined
+  /**
+   * Whether to join definitions without a blank line.
+   *
+   * The default is to add blank lines between any flow (“block”) construct.
+   * Turning this option on is a shortcut for a join function like so:
+   *
+   * ```js
+   * function joinTightDefinitions(left, right) {
+   * if (left.type === 'definition' && right.type === 'definition') {
+   * return 0
+   * }
+   * }
+   * ```
+   */
+  tightDefinitions?: boolean | null | undefined
+  /**
+   * Handle particular nodes.
+   *
+   * Each key is a node type, each value its corresponding handler.
+   */
+  handlers?: Partial<Handlers> | null | undefined
+  /**
+   * How to join blocks.
+   */
+  join?: Array<Join> | null | undefined
+  /**
+   * Schemas that define when characters cannot occur.
+   */
+  unsafe?: Array<Unsafe> | null | undefined
+  /**
+   * List of extensions to include.
+   *
+   * Each `ToMarkdownExtension` is an object with the same interface as
+   * `Options` here.
+   */
+  extensions?: Array<Options> | null | undefined
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/types.js

@@ -0,0 +1,408 @@
+/**
+ * @typedef {import('unist').Parent} UnistParent
+ * @typedef {import('unist').Point} Point
+ * @typedef {import('mdast').Association} Association
+ * @typedef {import('mdast').Content} Content
+ * @typedef {import('mdast').ListContent} ListContent
+ * @typedef {import('mdast').PhrasingContent} PhrasingContent
+ * @typedef {import('mdast').Root} Root
+ * @typedef {import('mdast').TopLevelContent} TopLevelContent
+ * @typedef {import('../index.js').ConstructName} ConstructName
+ */
+
+/**
+ * @typedef {Root | Content} Node
+ * @typedef {Extract<Node, UnistParent>} Parent
+ * @typedef {TopLevelContent | ListContent} FlowContent
+ *
+ * @typedef TrackFields
+ *   Info on where we are in the document we are generating.
+ * @property {Point} now
+ *   Current point.
+ * @property {number} lineShift
+ *   Number of columns each line will be shifted by wrapping nodes.
+ *
+ * @typedef SafeFields
+ *   Info on the characters that are around the current thing we are
+ *   generating.
+ * @property {string} before
+ *   Characters before this (guaranteed to be one, can be more).
+ * @property {string} after
+ *   Characters after this (guaranteed to be one, can be more).
+ *
+ * @typedef {TrackFields & SafeFields} Info
+ *   Info on the surrounding of the node that is serialized.
+ *
+ * @callback TrackCurrent
+ *   Get current tracked info.
+ * @returns {TrackFields}
+ *   Current tracked info.
+ *
+ * @callback TrackShift
+ *   Define a relative increased line shift (the typical indent for lines).
+ * @param {number} value
+ *   Relative increment in how much each line will be padded.
+ * @returns {void}
+ *   Nothing.
+ *
+ * @callback TrackMove
+ *   Move past some generated markdown.
+ * @param {string | null | undefined} value
+ *   Generated markdown.
+ * @returns {string}
+ *   Given markdown.
+ *
+ * @typedef Tracker
+ *   Track positional info in the output.
+ *
+ *   This info isn’t used yet but such functionality will allow line wrapping,
+ *   source maps, etc.
+ * @property {TrackCurrent} current
+ *   Get the current tracked info.
+ * @property {TrackShift} shift
+ *   Define an increased line shift (the typical indent for lines).
+ * @property {TrackMove} move
+ *   Move past some generated markdown.
+ *
+ * @callback CreateTracker
+ *   Track positional info in the output.
+ *
+ *   This info isn’t used yet but such functionality will allow line wrapping,
+ *   source maps, etc.
+ * @param {TrackFields} info
+ *   Info on where we are in the document we are generating.
+ * @returns {Tracker}
+ *   Tracker.
+ *
+ * @callback AssociationId
+ *   Get an identifier from an association to match it to others.
+ *
+ *   Associations are nodes that match to something else through an ID:
+ *   <https://github.com/syntax-tree/mdast#association>.
+ *
+ *   The `label` of an association is the string value: character escapes and
+ *   references work, and casing is intact.
+ *   The `identifier` is used to match one association to another:
+ *   controversially, character escapes and references don’t work in this
+ *   matching: `&copy;` does not match `©`, and `\+` does not match `+`.
+ *
+ *   But casing is ignored (and whitespace) is trimmed and collapsed: ` A\nb`
+ *   matches `a b`.
+ *   So, we do prefer the label when figuring out how we’re going to serialize:
+ *   it has whitespace, casing, and we can ignore most useless character
+ *   escapes and all character references.
+ * @param {Association} node
+ *   Node that includes an association.
+ * @returns {string}
+ *   ID.
+ *
+ * @callback Map
+ *   Map function to pad a single line.
+ * @param {string} value
+ *   A single line of serialized markdown.
+ * @param {number} line
+ *   Line number relative to the fragment.
+ * @param {boolean} blank
+ *   Whether the line is considered blank in markdown.
+ * @returns {string}
+ *   Padded line.
+ *
+ * @callback IndentLines
+ *   Pad serialized markdown.
+ * @param {string} value
+ *   Whole fragment of serialized markdown.
+ * @param {Map} map
+ *   Map function.
+ * @returns {string}
+ *   Padded value.
+ *
+ * @callback ContainerPhrasing
+ *   Serialize the children of a parent that contains phrasing children.
+ *
+ *   These children will be joined flush together.
+ * @param {Parent & {children: Array<PhrasingContent>}} parent
+ *   Parent of flow nodes.
+ * @param {Info} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined together.
+ *
+ * @callback ContainerFlow
+ *   Serialize the children of a parent that contains flow children.
+ *
+ *   These children will typically be joined by blank lines.
+ *   What they are joined by exactly is defined by `Join` functions.
+ * @param {Parent & {children: Array<FlowContent>}} parent
+ *   Parent of flow nodes.
+ * @param {TrackFields} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined by (blank) lines.
+ *
+ * @typedef SafeEncodeFields
+ *   Extra configuration for `safe`
+ * @property {Array<string> | null | undefined} [encode]
+ *   Extra characters that *must* be encoded (as character references) instead
+ *   of escaped (character escapes).
+ *
+ *   Only ASCII punctuation will use character escapes, so you never need to
+ *   pass non-ASCII-punctuation here.
+ *
+ * @typedef {SafeFields & SafeEncodeFields} SafeConfig
+ *
+ * @callback Safe
+ *   Make a string safe for embedding in markdown constructs.
+ *
+ *   In markdown, almost all punctuation characters can, in certain cases,
+ *   result in something.
+ *   Whether they do is highly subjective to where they happen and in what
+ *   they happen.
+ *
+ *   To solve this, `mdast-util-to-markdown` tracks:
+ *
+ *   * Characters before and after something;
+ *   * What “constructs” we are in.
+ *
+ *   This information is then used by this function to escape or encode
+ *   special characters.
+ * @param {string | null | undefined} input
+ *   Raw value to make safe.
+ * @param {SafeConfig} config
+ *   Configuration.
+ * @returns {string}
+ *   Serialized markdown safe for embedding.
+ *
+ * @callback Enter
+ *   Enter something.
+ * @param {ConstructName} name
+ *   Label, more similar to a micromark event than an mdast node type.
+ * @returns {Exit}
+ *   Revert.
+ *
+ * @callback Exit
+ *   Exit something.
+ * @returns {void}
+ *   Nothing.
+ *
+ * @typedef State
+ *   Info passed around about the current state.
+ * @property {Array<ConstructName>} stack
+ *   Stack of constructs we’re in.
+ * @property {Array<number>} indexStack
+ *   Positions of child nodes in their parents.
+ * @property {IndentLines} indentLines
+ *   Pad serialized markdown.
+ * @property {AssociationId} associationId
+ *   Get an identifier from an association to match it to others.
+ * @property {ContainerPhrasing} containerPhrasing
+ *   Serialize the children of a parent that contains phrasing children.
+ * @property {ContainerFlow} containerFlow
+ *   Serialize the children of a parent that contains flow children.
+ * @property {CreateTracker} createTracker
+ *   Track positional info in the output.
+ * @property {Safe} safe
+ *   Serialize the children of a parent that contains flow children.
+ * @property {Enter} enter
+ *   Enter a construct (returns a corresponding exit function).
+ * @property {Options} options
+ *   Applied user configuration.
+ * @property {Array<Unsafe>} unsafe
+ *   Applied unsafe patterns.
+ * @property {Array<Join>} join
+ *   Applied join handlers.
+ * @property {Handle} handle
+ *   Call the configured handler for the given node.
+ * @property {Handlers} handlers
+ *   Applied handlers.
+ * @property {string | undefined} bulletCurrent
+ *   List marker currently in use.
+ * @property {string | undefined} bulletLastUsed
+ *   List marker previously in use.
+ *
+ * @callback Handle
+ *   Handle a particular node.
+ * @param {any} node
+ *   Expected mdast node.
+ * @param {Parent | undefined} parent
+ *   Parent of `node`.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {Info} Info
+ *   Info on the surrounding of the node that is serialized.
+ * @returns {string}
+ *   Serialized markdown representing `node`.
+ *
+ * @typedef {Record<Node['type'], Handle>} Handlers
+ *   Handle particular nodes.
+ *
+ *   Each key is a node type, each value its corresponding handler.
+ *
+ * @callback Join
+ *   How to join two blocks.
+ *
+ *   “Blocks” are typically joined by one blank line.
+ *   Sometimes it’s nicer to have them flush next to each other, yet other
+ *   times they cannot occur together at all.
+ *
+ *   Join functions receive two adjacent siblings and their parent and what
+ *   they return defines how many blank lines to use between them.
+ * @param {Node} left
+ *   First of two adjacent siblings.
+ * @param {Node} right
+ *   Second of two adjacent siblings.
+ * @param {Parent} parent
+ *   Parent of the two siblings.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @returns {boolean | null | undefined | void | number}
+ *   How many blank lines to use between the siblings.
+ *
+ *   Where `true` is as passing `1` and `false` means the nodes cannot be
+ *   joined by a blank line, such as two adjacent block quotes or indented code
+ *   after a list, in which case a comment will be injected to break them up:
+ *
+ *   ```markdown
+ *   > Quote 1
+ *
+ *   <!---->
+ *
+ *   > Quote 2
+ *   ```
+ *
+ *    > 👉 **Note**: abusing this feature will break markdown.
+ *    > One such example is when returning `0` for two paragraphs, which will
+ *    > result in the text running together, and in the future to be seen as
+ *    > one paragraph.
+ *
+ * @typedef Unsafe
+ *   Schema that defines when a character cannot occur.
+ * @property {string} character
+ *   Single unsafe character.
+ * @property {ConstructName | Array<ConstructName> | null | undefined} [inConstruct]
+ *   Constructs where this is bad.
+ * @property {ConstructName | Array<ConstructName> | null | undefined} [notInConstruct]
+ *   Constructs where this is fine again.
+ * @property {string | null | undefined} [before]
+ *   `character` is bad when this is before it (cannot be used together with
+ *   `atBreak`).
+ * @property {string | null | undefined} [after]
+ *   `character` is bad when this is after it.
+ * @property {boolean | null | undefined} [atBreak]
+ *   `character` is bad at a break (cannot be used together with `before`).
+ * @property {RegExp | null | undefined} [_compiled]
+ *   The unsafe pattern (this whole object) compiled as a regex.
+ *
+ *   This is internal and must not be defined.
+ *
+ * @typedef Options
+ *   Configuration (optional).
+ * @property {'-' | '*' | '+' | null | undefined} [bullet='*']
+ *   Marker to use for bullets of items in unordered lists.
+ * @property {'-' | '*' | '+' | null | undefined} [bulletOther]
+ *   Marker to use in certain cases where the primary bullet doesn’t work.
+ *
+ *   There are three cases where the primary bullet cannot be used:
+ *
+ *   *   When three list items are on their own, the last one is empty, and
+ *       `bullet` is also a valid `rule`: `* - +`.
+ *       This would turn into a thematic break if serialized with three primary
+ *       bullets.
+ *       As this is an edge case unlikely to appear in normal markdown, the
+ *       last list item will be given a different bullet.
+ *   *   When a thematic break is the first child of one of the list items, and
+ *       `bullet` is the same character as `rule`: `- ***`.
+ *       This would turn into a single thematic break if serialized with
+ *       primary bullets.
+ *       As this is an edge case unlikely to appear in normal markdown this
+ *       markup is always fixed, even if `bulletOther` is not passed
+ *   *   When two unordered lists appear next to each other: `* a\n- b`.
+ *       CommonMark sees different bullets as different lists, but several
+ *       markdown parsers parse it as one list.
+ *       To solve for both, we instead inject an empty comment between the two
+ *       lists: `* a\n<!---->\n* b`, but if `bulletOther` is given explicitly,
+ *       it will be used instead
+ * @property {'.' | ')' | null | undefined} [bulletOrdered='.']
+ *   Marker to use for bullets of items in ordered lists.
+ * @property {'.' | ')' | null | undefined} [bulletOrderedOther]
+ *   Marker to use in certain cases where the primary bullet for ordered items
+ *   doesn’t work.
+ *
+ *   There is one case where the primary bullet for ordered items cannot be used:
+ *
+ *   *   When two ordered lists appear next to each other: `1. a\n2) b`.
+ *       CommonMark added support for `)` as a marker, but other markdown
+ *       parsers do not support it.
+ *       To solve for both, we instead inject an empty comment between the two
+ *       lists: `1. a\n<!---->\n1. b`, but if `bulletOrderedOther` is given
+ *       explicitly, it will be used instead
+ * @property {boolean | null | undefined} [closeAtx=false]
+ *   Whether to add the same number of number signs (`#`) at the end of an ATX
+ *   heading as the opening sequence.
+ * @property {'_' | '*' | null | undefined} [emphasis='*']
+ *   Marker to use for emphasis.
+ * @property {'~' | '`' | null | undefined} [fence='`']
+ *   Marker to use for fenced code.
+ * @property {boolean | null | undefined} [fences=false]
+ *   Whether to use fenced code always.
+ *
+ *   The default is to use fenced code if there is a language defined, if the
+ *   code is empty, or if it starts or ends in blank lines.
+ * @property {boolean | null | undefined} [incrementListMarker=true]
+ *   Whether to increment the counter of ordered lists items.
+ * @property {'tab' | 'one' | 'mixed' | null | undefined} [listItemIndent='tab']
+ *   How to indent the content of list items.
+ *
+ *   Either with the size of the bullet plus one space (when `'one'`), a tab
+ *   stop (`'tab'`), or depending on the item and its parent list (`'mixed'`,
+ *   uses `'one'` if the item and list are tight and `'tab'` otherwise).
+ * @property {'"' | "'" | null | undefined} [quote='"']
+ *   Marker to use for titles.
+ * @property {boolean | null | undefined} [resourceLink=false]
+ *   Whether to always use resource links.
+ *
+ *   The default is to use autolinks (`<https://example.com>`) when possible
+ *   and resource links (`[text](url)`) otherwise.
+ * @property {'-' | '_' | '*' | null | undefined} [rule='*']
+ *   Marker to use for thematic breaks.
+ * @property {number | null | undefined} [ruleRepetition=3]
+ *   Number of markers to use for thematic breaks.
+ * @property {boolean | null | undefined} [ruleSpaces=false]
+ *   Whether to add spaces between markers in thematic breaks.
+ * @property {boolean | null | undefined} [setext=false]
+ *   Whether to use setext headings when possible.
+ *
+ *   The default is to always use ATX headings (`# heading`) instead of setext
+ *   headings (`heading\n=======`).
+ *   Setext headings cannot be used for empty headings or headings with a rank
+ *   of three or more.
+ * @property {'_' | '*' | null | undefined} [strong='*']
+ *   Marker to use for strong.
+ * @property {boolean | null | undefined} [tightDefinitions=false]
+ *   Whether to join definitions without a blank line.
+ *
+ *   The default is to add blank lines between any flow (“block”) construct.
+ *   Turning this option on is a shortcut for a join function like so:
+ *
+ *   ```js
+ *   function joinTightDefinitions(left, right) {
+ *     if (left.type === 'definition' && right.type === 'definition') {
+ *       return 0
+ *     }
+ *   }
+ *   ```
+ * @property {Partial<Handlers> | null | undefined} [handlers={}]
+ *   Handle particular nodes.
+ *
+ *   Each key is a node type, each value its corresponding handler.
+ * @property {Array<Join> | null | undefined} [join=[]]
+ *   How to join blocks.
+ * @property {Array<Unsafe> | null | undefined} [unsafe=[]]
+ *   Schemas that define when characters cannot occur.
+ * @property {Array<Options> | null | undefined} [extensions=[]]
+ *   List of extensions to include.
+ *
+ *   Each `ToMarkdownExtension` is an object with the same interface as
+ *   `Options` here.
+ */
+
+export {}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/unsafe.d.ts

@@ -0,0 +1,4 @@
+/** @type {Array<Unsafe>} */
+export const unsafe: Array<Unsafe>
+export type Unsafe = import('./types.js').Unsafe
+export type ConstructName = import('./types.js').ConstructName

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/unsafe.js

@@ -0,0 +1,147 @@
+/**
+ * @typedef {import('./types.js').Unsafe} Unsafe
+ * @typedef {import('./types.js').ConstructName} ConstructName
+ */
+
+/**
+ * List of constructs that occur in phrasing (paragraphs, headings), but cannot
+ * contain things like attention (emphasis, strong), images, or links.
+ * So they sort of cancel each other out.
+ * Note: could use a better name.
+ *
+ * @type {Array<ConstructName>}
+ */
+const fullPhrasingSpans = [
+  'autolink',
+  'destinationLiteral',
+  'destinationRaw',
+  'reference',
+  'titleQuote',
+  'titleApostrophe'
+]
+
+/** @type {Array<Unsafe>} */
+export const unsafe = [
+  {character: '\t', after: '[\\r\\n]', inConstruct: 'phrasing'},
+  {character: '\t', before: '[\\r\\n]', inConstruct: 'phrasing'},
+  {
+    character: '\t',
+    inConstruct: ['codeFencedLangGraveAccent', 'codeFencedLangTilde']
+  },
+  {
+    character: '\r',
+    inConstruct: [
+      'codeFencedLangGraveAccent',
+      'codeFencedLangTilde',
+      'codeFencedMetaGraveAccent',
+      'codeFencedMetaTilde',
+      'destinationLiteral',
+      'headingAtx'
+    ]
+  },
+  {
+    character: '\n',
+    inConstruct: [
+      'codeFencedLangGraveAccent',
+      'codeFencedLangTilde',
+      'codeFencedMetaGraveAccent',
+      'codeFencedMetaTilde',
+      'destinationLiteral',
+      'headingAtx'
+    ]
+  },
+  {character: ' ', after: '[\\r\\n]', inConstruct: 'phrasing'},
+  {character: ' ', before: '[\\r\\n]', inConstruct: 'phrasing'},
+  {
+    character: ' ',
+    inConstruct: ['codeFencedLangGraveAccent', 'codeFencedLangTilde']
+  },
+  // An exclamation mark can start an image, if it is followed by a link or
+  // a link reference.
+  {
+    character: '!',
+    after: '\\[',
+    inConstruct: 'phrasing',
+    notInConstruct: fullPhrasingSpans
+  },
+  // A quote can break out of a title.
+  {character: '"', inConstruct: 'titleQuote'},
+  // A number sign could start an ATX heading if it starts a line.
+  {atBreak: true, character: '#'},
+  {character: '#', inConstruct: 'headingAtx', after: '(?:[\r\n]|$)'},
+  // Dollar sign and percentage are not used in markdown.
+  // An ampersand could start a character reference.
+  {character: '&', after: '[#A-Za-z]', inConstruct: 'phrasing'},
+  // An apostrophe can break out of a title.
+  {character: "'", inConstruct: 'titleApostrophe'},
+  // A left paren could break out of a destination raw.
+  {character: '(', inConstruct: 'destinationRaw'},
+  // A left paren followed by `]` could make something into a link or image.
+  {
+    before: '\\]',
+    character: '(',
+    inConstruct: 'phrasing',
+    notInConstruct: fullPhrasingSpans
+  },
+  // A right paren could start a list item or break out of a destination
+  // raw.
+  {atBreak: true, before: '\\d+', character: ')'},
+  {character: ')', inConstruct: 'destinationRaw'},
+  // An asterisk can start thematic breaks, list items, emphasis, strong.
+  {atBreak: true, character: '*', after: '(?:[ \t\r\n*])'},
+  {character: '*', inConstruct: 'phrasing', notInConstruct: fullPhrasingSpans},
+  // A plus sign could start a list item.
+  {atBreak: true, character: '+', after: '(?:[ \t\r\n])'},
+  // A dash can start thematic breaks, list items, and setext heading
+  // underlines.
+  {atBreak: true, character: '-', after: '(?:[ \t\r\n-])'},
+  // A dot could start a list item.
+  {atBreak: true, before: '\\d+', character: '.', after: '(?:[ \t\r\n]|$)'},
+  // Slash, colon, and semicolon are not used in markdown for constructs.
+  // A less than can start html (flow or text) or an autolink.
+  // HTML could start with an exclamation mark (declaration, cdata, comment),
+  // slash (closing tag), question mark (instruction), or a letter (tag).
+  // An autolink also starts with a letter.
+  // Finally, it could break out of a destination literal.
+  {atBreak: true, character: '<', after: '[!/?A-Za-z]'},
+  {
+    character: '<',
+    after: '[!/?A-Za-z]',
+    inConstruct: 'phrasing',
+    notInConstruct: fullPhrasingSpans
+  },
+  {character: '<', inConstruct: 'destinationLiteral'},
+  // An equals to can start setext heading underlines.
+  {atBreak: true, character: '='},
+  // A greater than can start block quotes and it can break out of a
+  // destination literal.
+  {atBreak: true, character: '>'},
+  {character: '>', inConstruct: 'destinationLiteral'},
+  // Question mark and at sign are not used in markdown for constructs.
+  // A left bracket can start definitions, references, labels,
+  {atBreak: true, character: '['},
+  {character: '[', inConstruct: 'phrasing', notInConstruct: fullPhrasingSpans},
+  {character: '[', inConstruct: ['label', 'reference']},
+  // A backslash can start an escape (when followed by punctuation) or a
+  // hard break (when followed by an eol).
+  // Note: typical escapes are handled in `safe`!
+  {character: '\\', after: '[\\r\\n]', inConstruct: 'phrasing'},
+  // A right bracket can exit labels.
+  {character: ']', inConstruct: ['label', 'reference']},
+  // Caret is not used in markdown for constructs.
+  // An underscore can start emphasis, strong, or a thematic break.
+  {atBreak: true, character: '_'},
+  {character: '_', inConstruct: 'phrasing', notInConstruct: fullPhrasingSpans},
+  // A grave accent can start code (fenced or text), or it can break out of
+  // a grave accent code fence.
+  {atBreak: true, character: '`'},
+  {
+    character: '`',
+    inConstruct: ['codeFencedLangGraveAccent', 'codeFencedMetaGraveAccent']
+  },
+  {character: '`', inConstruct: 'phrasing', notInConstruct: fullPhrasingSpans},
+  // Left brace, vertical bar, right brace are not used in markdown for
+  // constructs.
+  // A tilde can start code (fenced).
+  {atBreak: true, character: '~'}
+]

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/association.d.ts

@@ -0,0 +1,2 @@
+export function association(node: import('mdast').Association): string
+export type AssociationId = import('../types.js').AssociationId

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/association.js

@@ -0,0 +1,33 @@
+/**
+ * @typedef {import('../types.js').AssociationId} AssociationId
+ */
+
+import {decodeString} from 'micromark-util-decode-string'
+
+/**
+ * Get an identifier from an association to match it to others.
+ *
+ * Associations are nodes that match to something else through an ID:
+ * <https://github.com/syntax-tree/mdast#association>.
+ *
+ * The `label` of an association is the string value: character escapes and
+ * references work, and casing is intact.
+ * The `identifier` is used to match one association to another:
+ * controversially, character escapes and references don’t work in this
+ * matching: `&copy;` does not match `©`, and `\+` does not match `+`.
+ *
+ * But casing is ignored (and whitespace) is trimmed and collapsed: ` A\nb`
+ * matches `a b`.
+ * So, we do prefer the label when figuring out how we’re going to serialize:
+ * it has whitespace, casing, and we can ignore most useless character
+ * escapes and all character references.
+ *
+ * @type {AssociationId}
+ */
+export function association(node) {
+  if (node.label || !node.identifier) {
+    return node.label || ''
+  }
+
+  return decodeString(node.identifier)
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-ordered-other.d.ts

@@ -0,0 +1,9 @@
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bulletOrdered'], null | undefined>}
+ */
+export function checkBulletOrderedOther(
+  state: State
+): Exclude<Options['bulletOrdered'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-ordered-other.js

@@ -0,0 +1,39 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+import {checkBulletOrdered} from './check-bullet-ordered.js'
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bulletOrdered'], null | undefined>}
+ */
+export function checkBulletOrderedOther(state) {
+  const bulletOrdered = checkBulletOrdered(state)
+  const bulletOrderedOther = state.options.bulletOrderedOther
+
+  if (!bulletOrderedOther) {
+    return bulletOrdered === '.' ? ')' : '.'
+  }
+
+  if (bulletOrderedOther !== '.' && bulletOrderedOther !== ')') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        bulletOrderedOther +
+        '` for `options.bulletOrderedOther`, expected `*`, `+`, or `-`'
+    )
+  }
+
+  if (bulletOrderedOther === bulletOrdered) {
+    throw new Error(
+      'Expected `bulletOrdered` (`' +
+        bulletOrdered +
+        '`) and `bulletOrderedOther` (`' +
+        bulletOrderedOther +
+        '`) to be different'
+    )
+  }
+
+  return bulletOrderedOther
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-ordered.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bulletOrdered'], null | undefined>}
+ */
+export function checkBulletOrdered(
+  state: State
+): Exclude<Options['bulletOrdered'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-ordered.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bulletOrdered'], null | undefined>}
+ */
+export function checkBulletOrdered(state) {
+  const marker = state.options.bulletOrdered || '.'
+
+  if (marker !== '.' && marker !== ')') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        marker +
+        '` for `options.bulletOrdered`, expected `.` or `)`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-other.d.ts

@@ -0,0 +1,9 @@
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bullet'], null | undefined>}
+ */
+export function checkBulletOther(
+  state: State
+): Exclude<Options['bullet'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet-other.js

@@ -0,0 +1,39 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+import {checkBullet} from './check-bullet.js'
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bullet'], null | undefined>}
+ */
+export function checkBulletOther(state) {
+  const bullet = checkBullet(state)
+  const bulletOther = state.options.bulletOther
+
+  if (!bulletOther) {
+    return bullet === '*' ? '-' : '*'
+  }
+
+  if (bulletOther !== '*' && bulletOther !== '+' && bulletOther !== '-') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        bulletOther +
+        '` for `options.bulletOther`, expected `*`, `+`, or `-`'
+    )
+  }
+
+  if (bulletOther === bullet) {
+    throw new Error(
+      'Expected `bullet` (`' +
+        bullet +
+        '`) and `bulletOther` (`' +
+        bulletOther +
+        '`) to be different'
+    )
+  }
+
+  return bulletOther
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bullet'], null | undefined>}
+ */
+export function checkBullet(
+  state: State
+): Exclude<Options['bullet'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-bullet.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['bullet'], null | undefined>}
+ */
+export function checkBullet(state) {
+  const marker = state.options.bullet || '*'
+
+  if (marker !== '*' && marker !== '+' && marker !== '-') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        marker +
+        '` for `options.bullet`, expected `*`, `+`, or `-`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-emphasis.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['emphasis'], null | undefined>}
+ */
+export function checkEmphasis(
+  state: State
+): Exclude<Options['emphasis'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-emphasis.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['emphasis'], null | undefined>}
+ */
+export function checkEmphasis(state) {
+  const marker = state.options.emphasis || '*'
+
+  if (marker !== '*' && marker !== '_') {
+    throw new Error(
+      'Cannot serialize emphasis with `' +
+        marker +
+        '` for `options.emphasis`, expected `*`, or `_`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-fence.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['fence'], null | undefined>}
+ */
+export function checkFence(
+  state: State
+): Exclude<Options['fence'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-fence.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['fence'], null | undefined>}
+ */
+export function checkFence(state) {
+  const marker = state.options.fence || '`'
+
+  if (marker !== '`' && marker !== '~') {
+    throw new Error(
+      'Cannot serialize code with `' +
+        marker +
+        '` for `options.fence`, expected `` ` `` or `~`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-list-item-indent.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['listItemIndent'], null | undefined>}
+ */
+export function checkListItemIndent(
+  state: State
+): Exclude<Options['listItemIndent'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-list-item-indent.js

@@ -0,0 +1,28 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['listItemIndent'], null | undefined>}
+ */
+export function checkListItemIndent(state) {
+  const style = state.options.listItemIndent || 'tab'
+
+  // To do: remove in a major.
+  // @ts-expect-error: deprecated.
+  if (style === 1 || style === '1') {
+    return 'one'
+  }
+
+  if (style !== 'tab' && style !== 'one' && style !== 'mixed') {
+    throw new Error(
+      'Cannot serialize items with `' +
+        style +
+        '` for `options.listItemIndent`, expected `tab`, `one`, or `mixed`'
+    )
+  }
+
+  return style
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-quote.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['quote'], null | undefined>}
+ */
+export function checkQuote(
+  state: State
+): Exclude<Options['quote'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-quote.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['quote'], null | undefined>}
+ */
+export function checkQuote(state) {
+  const marker = state.options.quote || '"'
+
+  if (marker !== '"' && marker !== "'") {
+    throw new Error(
+      'Cannot serialize title with `' +
+        marker +
+        '` for `options.quote`, expected `"`, or `\'`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-rule-repetition.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['ruleRepetition'], null | undefined>}
+ */
+export function checkRuleRepetition(
+  state: State
+): Exclude<Options['ruleRepetition'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-rule-repetition.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['ruleRepetition'], null | undefined>}
+ */
+export function checkRuleRepetition(state) {
+  const repetition = state.options.ruleRepetition || 3
+
+  if (repetition < 3) {
+    throw new Error(
+      'Cannot serialize rules with repetition `' +
+        repetition +
+        '` for `options.ruleRepetition`, expected `3` or more'
+    )
+  }
+
+  return repetition
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-rule.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['rule'], null | undefined>}
+ */
+export function checkRule(
+  state: State
+): Exclude<Options['rule'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-rule.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['rule'], null | undefined>}
+ */
+export function checkRule(state) {
+  const marker = state.options.rule || '*'
+
+  if (marker !== '*' && marker !== '-' && marker !== '_') {
+    throw new Error(
+      'Cannot serialize rules with `' +
+        marker +
+        '` for `options.rule`, expected `*`, `-`, or `_`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-strong.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['strong'], null | undefined>}
+ */
+export function checkStrong(
+  state: State
+): Exclude<Options['strong'], null | undefined>
+export type State = import('../types.js').State
+export type Options = import('../types.js').Options

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/check-strong.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').Options} Options
+ */
+
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['strong'], null | undefined>}
+ */
+export function checkStrong(state) {
+  const marker = state.options.strong || '*'
+
+  if (marker !== '*' && marker !== '_') {
+    throw new Error(
+      'Cannot serialize strong with `' +
+        marker +
+        '` for `options.strong`, expected `*`, or `_`'
+    )
+  }
+
+  return marker
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/container-flow.d.ts

@@ -0,0 +1,29 @@
+/**
+ * @typedef {import('../types.js').FlowContent} FlowContent
+ * @typedef {import('../types.js').Node} Node
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').TrackFields} TrackFields
+ */
+/**
+ * @param {Parent & {children: Array<FlowContent>}} parent
+ *   Parent of flow nodes.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {TrackFields} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined by (blank) lines.
+ */
+export function containerFlow(
+  parent: import('../types.js').Parent & {
+    children: Array<FlowContent>
+  },
+  state: State,
+  info: TrackFields
+): string
+export type FlowContent = import('../types.js').FlowContent
+export type Node = import('../types.js').Node
+export type Parent = import('../types.js').Parent
+export type State = import('../types.js').State
+export type TrackFields = import('../types.js').TrackFields

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/container-flow.js

@@ -0,0 +1,87 @@
+/**
+ * @typedef {import('../types.js').FlowContent} FlowContent
+ * @typedef {import('../types.js').Node} Node
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').State} State
+ * @typedef {import('../types.js').TrackFields} TrackFields
+ */
+
+/**
+ * @param {Parent & {children: Array<FlowContent>}} parent
+ *   Parent of flow nodes.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {TrackFields} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined by (blank) lines.
+ */
+export function containerFlow(parent, state, info) {
+  const indexStack = state.indexStack
+  const children = parent.children || []
+  const tracker = state.createTracker(info)
+  /** @type {Array<string>} */
+  const results = []
+  let index = -1
+
+  indexStack.push(-1)
+
+  while (++index < children.length) {
+    const child = children[index]
+
+    indexStack[indexStack.length - 1] = index
+
+    results.push(
+      tracker.move(
+        state.handle(child, parent, state, {
+          before: '\n',
+          after: '\n',
+          ...tracker.current()
+        })
+      )
+    )
+
+    if (child.type !== 'list') {
+      state.bulletLastUsed = undefined
+    }
+
+    if (index < children.length - 1) {
+      results.push(
+        tracker.move(between(child, children[index + 1], parent, state))
+      )
+    }
+  }
+
+  indexStack.pop()
+
+  return results.join('')
+}
+
+/**
+ * @param {Node} left
+ * @param {Node} right
+ * @param {Parent} parent
+ * @param {State} state
+ * @returns {string}
+ */
+function between(left, right, parent, state) {
+  let index = state.join.length
+
+  while (index--) {
+    const result = state.join[index](left, right, parent, state)
+
+    if (result === true || result === 1) {
+      break
+    }
+
+    if (typeof result === 'number') {
+      return '\n'.repeat(1 + result)
+    }
+
+    if (result === false) {
+      return '\n\n<!---->\n\n'
+    }
+  }
+
+  return '\n\n'
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/container-phrasing.d.ts

@@ -0,0 +1,33 @@
+/**
+ * @typedef {import('../types.js').Handle} Handle
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').PhrasingContent} PhrasingContent
+ * @typedef {import('../types.js').State} State
+ */
+/**
+ * Serialize the children of a parent that contains phrasing children.
+ *
+ * These children will be joined flush together.
+ *
+ * @param {Parent & {children: Array<PhrasingContent>}} parent
+ *   Parent of flow nodes.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {Info} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined together.
+ */
+export function containerPhrasing(
+  parent: import('../types.js').Parent & {
+    children: Array<PhrasingContent>
+  },
+  state: State,
+  info: Info
+): string
+export type Handle = import('../types.js').Handle
+export type Info = import('../types.js').Info
+export type Parent = import('../types.js').Parent
+export type PhrasingContent = import('../types.js').PhrasingContent
+export type State = import('../types.js').State

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/container-phrasing.js

@@ -0,0 +1,97 @@
+/**
+ * @typedef {import('../types.js').Handle} Handle
+ * @typedef {import('../types.js').Info} Info
+ * @typedef {import('../types.js').Parent} Parent
+ * @typedef {import('../types.js').PhrasingContent} PhrasingContent
+ * @typedef {import('../types.js').State} State
+ */
+
+/**
+ * Serialize the children of a parent that contains phrasing children.
+ *
+ * These children will be joined flush together.
+ *
+ * @param {Parent & {children: Array<PhrasingContent>}} parent
+ *   Parent of flow nodes.
+ * @param {State} state
+ *   Info passed around about the current state.
+ * @param {Info} info
+ *   Info on where we are in the document we are generating.
+ * @returns {string}
+ *   Serialized children, joined together.
+ */
+export function containerPhrasing(parent, state, info) {
+  const indexStack = state.indexStack
+  const children = parent.children || []
+  /** @type {Array<string>} */
+  const results = []
+  let index = -1
+  let before = info.before
+
+  indexStack.push(-1)
+  let tracker = state.createTracker(info)
+
+  while (++index < children.length) {
+    const child = children[index]
+    /** @type {string} */
+    let after
+
+    indexStack[indexStack.length - 1] = index
+
+    if (index + 1 < children.length) {
+      /** @type {Handle} */
+      // @ts-expect-error: hush, it’s actually a `zwitch`.
+      let handle = state.handle.handlers[children[index + 1].type]
+      /** @type {Handle} */
+      // @ts-expect-error: hush, it’s actually a `zwitch`.
+      if (handle && handle.peek) handle = handle.peek
+      after = handle
+        ? handle(children[index + 1], parent, state, {
+            before: '',
+            after: '',
+            ...tracker.current()
+          }).charAt(0)
+        : ''
+    } else {
+      after = info.after
+    }
+
+    // In some cases, html (text) can be found in phrasing right after an eol.
+    // When we’d serialize that, in most cases that would be seen as html
+    // (flow).
+    // As we can’t escape or so to prevent it from happening, we take a somewhat
+    // reasonable approach: replace that eol with a space.
+    // See: <https://github.com/syntax-tree/mdast-util-to-markdown/issues/15>
+    if (
+      results.length > 0 &&
+      (before === '\r' || before === '\n') &&
+      child.type === 'html'
+    ) {
+      results[results.length - 1] = results[results.length - 1].replace(
+        /(\r?\n|\r)$/,
+        ' '
+      )
+      before = ' '
+
+      // To do: does this work to reset tracker?
+      tracker = state.createTracker(info)
+      tracker.move(results.join(''))
+    }
+
+    results.push(
+      tracker.move(
+        state.handle(child, parent, state, {
+          ...tracker.current(),
+          before,
+          after
+        })
+      )
+    )
+
+    before = results[results.length - 1].slice(-1)
+  }
+
+  indexStack.pop()
+
+  return results.join('')
+}

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/format-code-as-indented.d.ts

@@ -0,0 +1,12 @@
+/**
+ * @typedef {import('mdast').Code} Code
+ * @typedef {import('../types.js').State} State
+ */
+/**
+ * @param {Code} node
+ * @param {State} state
+ * @returns {boolean}
+ */
+export function formatCodeAsIndented(node: Code, state: State): boolean
+export type Code = import('mdast').Code
+export type State = import('../types.js').State

node_modules/mdast-util-math/node_modules/mdast-util-to-markdown/lib/util/format-code-as-indented.js

@@ -0,0 +1,22 @@
+/**
+ * @typedef {import('mdast').Code} Code
+ * @typedef {import('../types.js').State} State
+ */
+
+/**
+ * @param {Code} node
+ * @param {State} state
+ * @returns {boolean}
+ */
+export function formatCodeAsIndented(node, state) {
+  return Boolean(
+    !state.options.fences &&
+      node.value &&
+      // If there’s no info…
+      !node.lang &&
+      // And there’s a non-whitespace character…
+      /[^ \r\n]/.test(node.value) &&
+      // And the value doesn’t start or end in a blank…
+      !/^[\t ]*(?:[\r\n]|$)|(?:^|[\r\n])[\t ]*$/.test(node.value)
+  )
+}