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66
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1 package lexers
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2
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3 import (
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4 . "github.com/alecthomas/chroma/v2" // nolint
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5 )
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6
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7 // Markdown lexer.
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8 var Markdown = Register(DelegatingLexer(HTML, MustNewLexer(
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9 &Config{
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10 Name: "markdown",
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11 Aliases: []string{"md", "mkd"},
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12 Filenames: []string{"*.md", "*.mkd", "*.markdown"},
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13 MimeTypes: []string{"text/x-markdown"},
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14 },
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15 markdownRules,
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16 )))
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17
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18 func markdownRules() Rules {
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19 return Rules{
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20 "root": {
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21 {`^(#[^#].+\n)`, ByGroups(GenericHeading), nil},
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22 {`^(#{2,6}.+\n)`, ByGroups(GenericSubheading), nil},
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23 {`^(\s*)([*-] )(\[[ xX]\])( .+\n)`, ByGroups(Text, Keyword, Keyword, UsingSelf("inline")), nil},
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24 {`^(\s*)([*-])(\s)(.+\n)`, ByGroups(Text, Keyword, Text, UsingSelf("inline")), nil},
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25 {`^(\s*)([0-9]+\.)( .+\n)`, ByGroups(Text, Keyword, UsingSelf("inline")), nil},
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26 {`^(\s*>\s)(.+\n)`, ByGroups(Keyword, GenericEmph), nil},
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27 {"^(```\\n)([\\w\\W]*?)(^```$)", ByGroups(String, Text, String), nil},
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28 {
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29 "^(```)(\\w+)(\\n)([\\w\\W]*?)(^```$)",
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30 UsingByGroup(2, 4, String, String, String, Text, String),
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31 nil,
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32 },
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33 Include("inline"),
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34 },
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35 "inline": {
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36 {`\\.`, Text, nil},
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37 {`(\s)(\*|_)((?:(?!\2).)*)(\2)((?=\W|\n))`, ByGroups(Text, GenericEmph, GenericEmph, GenericEmph, Text), nil},
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38 {`(\s)((\*\*|__).*?)\3((?=\W|\n))`, ByGroups(Text, GenericStrong, GenericStrong, Text), nil},
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39 {`(\s)(~~[^~]+~~)((?=\W|\n))`, ByGroups(Text, GenericDeleted, Text), nil},
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40 {"`[^`]+`", LiteralStringBacktick, nil},
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41 {`[@#][\w/:]+`, NameEntity, nil},
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42 {`(!?\[)([^]]+)(\])(\()([^)]+)(\))`, ByGroups(Text, NameTag, Text, Text, NameAttribute, Text), nil},
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43 {`[^\\\s]+`, Other, nil},
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44 {`.|\n`, Other, nil},
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45 },
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46 }
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47 }
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