88 lines
2.1 KiB
JavaScript
88 lines
2.1 KiB
JavaScript
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/**
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* @typedef {import('mdast-util-from-markdown').CompileContext} CompileContext
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* @typedef {import('mdast-util-from-markdown').Extension} FromMarkdownExtension
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* @typedef {import('mdast-util-from-markdown').Handle} FromMarkdownHandle
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*
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* @typedef {import('mdast-util-to-markdown').Handle} ToMarkdownHandle
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* @typedef {import('mdast-util-to-markdown').Options} ToMarkdownExtension
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*
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* @typedef {import('../index.js').MdxjsEsm} MdxjsEsm
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*/
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// To do: next major: expose functions.
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import {ok as assert} from 'devlop'
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/**
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* Create an extension for `mdast-util-from-markdown` to enable MDX.js ESM in
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* markdown.
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*
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* When using the micromark syntax extension with `addResult`, nodes will have
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* a `data.estree` field set to an ESTree [`Program`][program] node.
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*
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* @returns {FromMarkdownExtension}
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* Extension for `mdast-util-from-markdown` to enable MDX.js ESM.
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*/
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export function mdxjsEsmFromMarkdown() {
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return {
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enter: {mdxjsEsm: enterMdxjsEsm},
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exit: {mdxjsEsm: exitMdxjsEsm, mdxjsEsmData: exitMdxjsEsmData}
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}
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}
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/**
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* Create an extension for `mdast-util-to-markdown` to enable MDX.js ESM in
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* markdown.
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*
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* @returns {ToMarkdownExtension}
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* Extension for `mdast-util-to-markdown` to enable MDX.js ESM.
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*/
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export function mdxjsEsmToMarkdown() {
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return {handlers: {mdxjsEsm: handleMdxjsEsm}}
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}
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/**
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* @this {CompileContext}
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* @type {FromMarkdownHandle}
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*/
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function enterMdxjsEsm(token) {
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this.enter({type: 'mdxjsEsm', value: ''}, token)
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this.buffer() // Capture EOLs
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}
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/**
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* @this {CompileContext}
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* @type {FromMarkdownHandle}
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*/
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function exitMdxjsEsm(token) {
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const value = this.resume()
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const node = this.stack[this.stack.length - 1]
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assert(node.type === 'mdxjsEsm')
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this.exit(token)
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const estree = token.estree
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node.value = value
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if (estree) {
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node.data = {estree}
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}
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}
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/**
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* @this {CompileContext}
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* @type {FromMarkdownHandle}
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*/
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function exitMdxjsEsmData(token) {
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this.config.enter.data.call(this, token)
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this.config.exit.data.call(this, token)
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}
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/**
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* @type {ToMarkdownHandle}
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* @param {MdxjsEsm} node
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*/
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function handleMdxjsEsm(node) {
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return node.value || ''
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}
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