155 lines
5.1 KiB
TypeScript
155 lines
5.1 KiB
TypeScript
import { marked, Lexer } from 'marked'
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import Highlight, { defaultProps, Language, } from 'prism-react-renderer'
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import { renderToStaticMarkup } from 'react-dom/server'
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// image sizes. DDoS Safe?
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const imageSizeLink = /^!?\[((?:\[[^\[\]]*\]|\\[\[\]]?|`[^`]*`|[^\[\]\\])*?)\]\(\s*(<(?:\\[<>]?|[^\s<>\\])*>|(?:\\[()]?|\([^\s\x00-\x1f()\\]*\)|[^\s\x00-\x1f()\\])*?(?:\s+=(?:[\w%]+)?x(?:[\w%]+)?)?)(?:\s+("(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)))?\s*\)/;
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//@ts-ignore
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Lexer.rules.inline.normal.link = imageSizeLink;
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//@ts-ignore
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Lexer.rules.inline.gfm.link = imageSizeLink;
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//@ts-ignore
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Lexer.rules.inline.breaks.link = imageSizeLink;
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//@ts-ignore
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delete defaultProps.theme
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// import linkStyles from '../components/link/link.module.css'
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const renderer = new marked.Renderer()
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renderer.heading = (text, level, _, slugger) => {
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const id = slugger.slug(text)
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const Component = `h${level}`
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return renderToStaticMarkup(
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//@ts-ignore
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<Component>
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<a href={`#${id}`} id={id} style={{ color: "inherit" }} dangerouslySetInnerHTML={{ __html: (text) }} >
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</a>
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</Component>
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)
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}
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// renderer.link = (href, _, text) => {
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// const isHrefLocal = href?.startsWith('/') || href?.startsWith('#')
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// if (isHrefLocal) {
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// return renderToStaticMarkup(
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// <a href={href || ''}>
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// {text}
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// </a>
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// )
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// }
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// // dirty hack
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// // if text contains elements, render as html
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// return <a href={href || ""} target="_blank" rel="noopener noreferrer" dangerouslySetInnerHTML={{ __html: convertHtmlEntities(text) }} ></a>
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// }
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renderer.image = function (href, _, text) {
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return `<Image loading="lazy" src="${href}" alt="${text}" layout="fill" />`
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}
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renderer.checkbox = () => ''
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renderer.listitem = (text, task, checked) => {
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if (task) {
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return `<li class="reset"><span class="check">​<input type="checkbox" disabled ${checked ? 'checked' : ''
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} /></span><span>${text}</span></li>`
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}
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return `<li>${text}</li>`
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}
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renderer.code = (code: string, language: string) => {
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return renderToStaticMarkup(
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<pre>
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{/* {title && <code>{title} </code>} */}
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{/* {language && title && <code style={{}}> {language} </code>} */}
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<Code
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language={language}
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// title={title}
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code={code}
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// highlight={highlight}
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/>
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</pre>
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)
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}
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marked.setOptions({
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gfm: true,
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breaks: true,
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headerIds: true,
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renderer,
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})
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const markdown = (markdown: string) => marked(markdown)
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export default markdown
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const Code = ({ code, language, highlight, title, ...props }: {
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code: string,
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language: string,
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highlight?: string,
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title?: string,
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}) => {
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if (!language)
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return (
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<>
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<code {...props} dangerouslySetInnerHTML={{ __html: code }
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} />
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</>
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)
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const highlightedLines = highlight
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//@ts-ignore
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? highlight.split(',').reduce((lines, h) => {
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if (h.includes('-')) {
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// Expand ranges like 3-5 into [3,4,5]
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const [start, end] = h.split('-').map(Number)
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const x = Array(end - start + 1)
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.fill(undefined)
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.map((_, i) => i + start)
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return [...lines, ...x]
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}
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return [...lines, Number(h)]
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}, [])
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: ''
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// https://mdxjs.com/guides/syntax-harkedighlighting#all-together
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return (
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<>
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<Highlight {...defaultProps} code={code.trim()} language={language as Language} >
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{({ className, style, tokens, getLineProps, getTokenProps }) => (
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<code className={className} style={{ ...style }}>
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{
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tokens.map((line, i) => (
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<div
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key={i}
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{...getLineProps({ line, key: i })}
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style={
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//@ts-ignore
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highlightedLines.includes((i + 1).toString())
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? {
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background: 'var(--highlight)',
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margin: '0 -1rem',
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padding: '0 1rem',
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}
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: undefined
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}
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>
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{
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line.map((token, key) => (
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<span key={key} {...getTokenProps({ token, key })} />
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))
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}
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</div>
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))}
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</code>
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)}
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</Highlight>
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</>
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)
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}
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