105 lines
2.6 KiB
JavaScript
105 lines
2.6 KiB
JavaScript
/**
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* @typedef {import('estree-jsx').Program} Program
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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').Options} ToMarkdownExtension
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* @typedef {import('mdast-util-to-markdown').Handle} ToMarkdownHandle
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*
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* @typedef {import('../index.js').MdxFlowExpression} MdxFlowExpression
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* @typedef {import('../index.js').MdxTextExpression} MdxTextExpression
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*/
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/**
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* Extension for `mdast-util-from-markdown` to enable MDX expressions.
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*
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* When using the syntax extension with `addResult`, nodes will have a
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* `data.estree` field set to an ESTree `Program` node.
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*
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* @type {FromMarkdownExtension}
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*/
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export const mdxExpressionFromMarkdown = {
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enter: {
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mdxFlowExpression: enterMdxFlowExpression,
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mdxTextExpression: enterMdxTextExpression
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},
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exit: {
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mdxFlowExpression: exitMdxExpression,
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mdxFlowExpressionChunk: exitMdxExpressionData,
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mdxTextExpression: exitMdxExpression,
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mdxTextExpressionChunk: exitMdxExpressionData
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}
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}
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/**
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* Extension for `mdast-util-to-markdown` to enable MDX ESM.
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*
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* @type {ToMarkdownExtension}
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*/
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export const mdxExpressionToMarkdown = {
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handlers: {
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mdxFlowExpression: handleMdxExpression,
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mdxTextExpression: handleMdxExpression
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},
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unsafe: [
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{character: '{', inConstruct: ['phrasing']},
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{atBreak: true, character: '{'}
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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 enterMdxFlowExpression(token) {
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this.enter({type: 'mdxFlowExpression', value: ''}, token)
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this.buffer()
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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 enterMdxTextExpression(token) {
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this.enter({type: 'mdxTextExpression', value: ''}, token)
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this.buffer()
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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 exitMdxExpression(token) {
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const value = this.resume()
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/** @type {Program | undefined} */
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// @ts-expect-error: estree.
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const estree = token.estree
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const node = /** @type {MdxFlowExpression | MdxTextExpression} */ (
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this.exit(token)
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)
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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 exitMdxExpressionData(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 {MdxFlowExpression | MdxTextExpression} node
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*/
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function handleMdxExpression(node) {
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const value = node.value || ''
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return '{' + value + '}'
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}
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