85 lines
3.2 KiB
TypeScript
85 lines
3.2 KiB
TypeScript
import {
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Language, defineLanguageFacet, languageDataProp, foldNodeProp, indentNodeProp,
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LanguageDescription, ParseContext
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} from "@codemirror/language"
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import {styleTags, tags as t} from "@codemirror/highlight"
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import {parser as baseParser, MarkdownParser, GFM, Subscript, Superscript, Emoji, MarkdownConfig} from "@lezer/markdown"
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const data = defineLanguageFacet({block: {open: "<!--", close: "-->"}})
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export const commonmark = baseParser.configure({
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props: [
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styleTags({
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"Blockquote/...": t.quote,
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HorizontalRule: t.contentSeparator,
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"ATXHeading1/... SetextHeading1/...": t.heading1,
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"ATXHeading2/... SetextHeading2/...": t.heading2,
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"ATXHeading3/...": t.heading3,
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"ATXHeading4/...": t.heading4,
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"ATXHeading5/...": t.heading5,
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"ATXHeading6/...": t.heading6,
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"Comment CommentBlock": t.comment,
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Escape: t.escape,
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Entity: t.character,
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"Emphasis/...": t.emphasis,
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"StrongEmphasis/...": t.strong,
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"Link/... Image/...": t.link,
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"OrderedList/... BulletList/...": t.list,
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// "CodeBlock/... FencedCode/...": t.blockComment,
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"InlineCode CodeText": t.monospace,
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URL: t.url,
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"HeaderMark HardBreak QuoteMark ListMark LinkMark EmphasisMark CodeMark": t.processingInstruction,
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"CodeInfo LinkLabel": t.labelName,
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LinkTitle: t.string,
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Paragraph: t.content
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}),
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foldNodeProp.add(type => {
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if (!type.is("Block") || type.is("Document")) return undefined
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return (tree, state) => ({from: state.doc.lineAt(tree.from).to, to: tree.to})
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}),
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indentNodeProp.add({
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Document: () => null
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}),
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languageDataProp.add({
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Document: data
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})
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]
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})
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export function mkLang(parser: MarkdownParser) {
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return new Language(data, parser, parser.nodeSet.types.find(t => t.name == "Document")!)
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}
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/// Language support for strict CommonMark.
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export const commonmarkLanguage = mkLang(commonmark)
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const extended = commonmark.configure([GFM, Subscript, Superscript, Emoji, {
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props: [
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styleTags({
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"TableDelimiter SubscriptMark SuperscriptMark StrikethroughMark": t.processingInstruction,
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"TableHeader/...": t.heading,
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"Strikethrough/...": t.strikethrough,
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TaskMarker: t.atom,
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Task: t.list,
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Emoji: t.character,
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"Subscript Superscript": t.special(t.content),
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TableCell: t.content
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})
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]
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}])
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/// Language support for [GFM](https://github.github.com/gfm/) plus
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/// subscript, superscript, and emoji syntax.
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export const markdownLanguage = mkLang(extended)
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export function getCodeParser(languages: readonly LanguageDescription[],
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defaultLanguage?: Language) {
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return (info: string) => {
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let found = info && LanguageDescription.matchLanguageName(languages, info, true)
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if (!found) return defaultLanguage ? defaultLanguage.parser : null
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if (found.support) return found.support.language.parser
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return ParseContext.getSkippingParser(found.load())
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}
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}
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