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48 lines
1.6 KiB
Go
48 lines
1.6 KiB
Go
package lexers
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import (
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. "github.com/alecthomas/chroma/v2" // nolint
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)
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// Markdown lexer.
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var Markdown = Register(DelegatingLexer(HTML, MustNewLexer(
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&Config{
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Name: "markdown",
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Aliases: []string{"md", "mkd"},
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Filenames: []string{"*.md", "*.mkd", "*.markdown"},
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MimeTypes: []string{"text/x-markdown"},
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},
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markdownRules,
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)))
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func markdownRules() Rules {
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return Rules{
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"root": {
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{`^(#[^#].+\n)`, ByGroups(GenericHeading), nil},
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{`^(#{2,6}.+\n)`, ByGroups(GenericSubheading), nil},
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{`^(\s*)([*-] )(\[[ xX]\])( .+\n)`, ByGroups(Text, Keyword, Keyword, UsingSelf("inline")), nil},
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{`^(\s*)([*-])(\s)(.+\n)`, ByGroups(Text, Keyword, Text, UsingSelf("inline")), nil},
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{`^(\s*)([0-9]+\.)( .+\n)`, ByGroups(Text, Keyword, UsingSelf("inline")), nil},
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{`^(\s*>\s)(.+\n)`, ByGroups(Keyword, GenericEmph), nil},
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{"^(```\\n)([\\w\\W]*?)(^```$)", ByGroups(String, Text, String), nil},
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{
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"^(```)(\\w+)(\\n)([\\w\\W]*?)(^```$)",
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UsingByGroup(2, 4, String, String, String, Text, String),
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nil,
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},
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Include("inline"),
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},
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"inline": {
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{`\\.`, Text, nil},
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{`(\s)(\*|_)((?:(?!\2).)*)(\2)((?=\W|\n))`, ByGroups(Text, GenericEmph, GenericEmph, GenericEmph, Text), nil},
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{`(\s)((\*\*|__).*?)\3((?=\W|\n))`, ByGroups(Text, GenericStrong, GenericStrong, Text), nil},
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{`(\s)(~~[^~]+~~)((?=\W|\n))`, ByGroups(Text, GenericDeleted, Text), nil},
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{"`[^`]+`", LiteralStringBacktick, nil},
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{`[@#][\w/:]+`, NameEntity, nil},
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{`(!?\[)([^]]+)(\])(\()([^)]+)(\))`, ByGroups(Text, NameTag, Text, Text, NameAttribute, Text), nil},
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{`[^\\\s]+`, Other, nil},
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{`.|\n`, Other, nil},
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},
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}
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}
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