mirror of https://github.com/cheat/cheat.git
91 lines
4.1 KiB
Go
91 lines
4.1 KiB
Go
package r
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import (
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"strings"
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. "github.com/alecthomas/chroma" // nolint
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"github.com/alecthomas/chroma/lexers/internal"
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)
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// Restructuredtext lexer.
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var Restructuredtext = internal.Register(MustNewLazyLexer(
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&Config{
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Name: "reStructuredText",
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Aliases: []string{"rst", "rest", "restructuredtext"},
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Filenames: []string{"*.rst", "*.rest"},
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MimeTypes: []string{"text/x-rst", "text/prs.fallenstein.rst"},
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},
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restructuredtextRules,
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))
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func restructuredtextRules() Rules {
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return Rules{
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"root": {
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{"^(=+|-+|`+|:+|\\.+|\\'+|\"+|~+|\\^+|_+|\\*+|\\++|#+)([ \\t]*\\n)(.+)(\\n)(\\1)(\\n)", ByGroups(GenericHeading, Text, GenericHeading, Text, GenericHeading, Text), nil},
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{"^(\\S.*)(\\n)(={3,}|-{3,}|`{3,}|:{3,}|\\.{3,}|\\'{3,}|\"{3,}|~{3,}|\\^{3,}|_{3,}|\\*{3,}|\\+{3,}|#{3,})(\\n)", ByGroups(GenericHeading, Text, GenericHeading, Text), nil},
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{`^(\s*)([-*+])( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
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{`^(\s*)([0-9#ivxlcmIVXLCM]+\.)( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
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{`^(\s*)(\(?[0-9#ivxlcmIVXLCM]+\))( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
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{`^(\s*)([A-Z]+\.)( .+\n(?:\1 .+\n)+)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
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{`^(\s*)(\(?[A-Za-z]+\))( .+\n(?:\1 .+\n)+)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
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{`^(\s*)(\|)( .+\n(?:\| .+\n)*)`, ByGroups(Text, Operator, UsingSelf("inline")), nil},
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{`^( *\.\.)(\s*)((?:source)?code(?:-block)?)(::)([ \t]*)([^\n]+)(\n[ \t]*\n)([ \t]+)(.*)(\n)((?:(?:\8.*|)\n)+)`, EmitterFunc(rstCodeBlock), nil},
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{`^( *\.\.)(\s*)([\w:-]+?)(::)(?:([ \t]*)(.*))`, ByGroups(Punctuation, Text, OperatorWord, Punctuation, Text, UsingSelf("inline")), nil},
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{`^( *\.\.)(\s*)(_(?:[^:\\]|\\.)+:)(.*?)$`, ByGroups(Punctuation, Text, NameTag, UsingSelf("inline")), nil},
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{`^( *\.\.)(\s*)(\[.+\])(.*?)$`, ByGroups(Punctuation, Text, NameTag, UsingSelf("inline")), nil},
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{`^( *\.\.)(\s*)(\|.+\|)(\s*)([\w:-]+?)(::)(?:([ \t]*)(.*))`, ByGroups(Punctuation, Text, NameTag, Text, OperatorWord, Punctuation, Text, UsingSelf("inline")), nil},
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{`^ *\.\..*(\n( +.*\n|\n)+)?`, CommentPreproc, nil},
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{`^( *)(:[a-zA-Z-]+:)(\s*)$`, ByGroups(Text, NameClass, Text), nil},
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{`^( *)(:.*?:)([ \t]+)(.*?)$`, ByGroups(Text, NameClass, Text, NameFunction), nil},
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{`^(\S.*(?<!::)\n)((?:(?: +.*)\n)+)`, ByGroups(UsingSelf("inline"), UsingSelf("inline")), nil},
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{`(::)(\n[ \t]*\n)([ \t]+)(.*)(\n)((?:(?:\3.*|)\n)+)`, ByGroups(LiteralStringEscape, Text, LiteralString, LiteralString, Text, LiteralString), nil},
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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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{"``", LiteralString, Push("literal")},
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{"(`.+?)(<.+?>)(`__?)", ByGroups(LiteralString, LiteralStringInterpol, LiteralString), nil},
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{"`.+?`__?", LiteralString, nil},
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{"(`.+?`)(:[a-zA-Z0-9:-]+?:)?", ByGroups(NameVariable, NameAttribute), nil},
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{"(:[a-zA-Z0-9:-]+?:)(`.+?`)", ByGroups(NameAttribute, NameVariable), nil},
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{`\*\*.+?\*\*`, GenericStrong, nil},
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{`\*.+?\*`, GenericEmph, nil},
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{`\[.*?\]_`, LiteralString, nil},
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{`<.+?>`, NameTag, nil},
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{"[^\\\\\\n\\[*`:]+", Text, nil},
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{`.`, Text, nil},
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},
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"literal": {
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{"[^`]+", LiteralString, nil},
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{"``((?=$)|(?=[-/:.,; \\n\\x00\\\u2010\\\u2011\\\u2012\\\u2013\\\u2014\\\u00a0\\'\\\"\\)\\]\\}\\>\\\u2019\\\u201d\\\u00bb\\!\\?]))", LiteralString, Pop(1)},
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{"`", LiteralString, nil},
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},
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}
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}
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func rstCodeBlock(groups []string, state *LexerState) Iterator {
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iterators := []Iterator{}
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tokens := []Token{
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{Punctuation, groups[1]},
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{Text, groups[2]},
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{OperatorWord, groups[3]},
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{Punctuation, groups[4]},
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{Text, groups[5]},
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{Keyword, groups[6]},
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{Text, groups[7]},
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}
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code := strings.Join(groups[8:], "")
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lexer := internal.Get(groups[6])
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if lexer == nil {
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tokens = append(tokens, Token{String, code})
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iterators = append(iterators, Literator(tokens...))
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} else {
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sub, err := lexer.Tokenise(nil, code)
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if err != nil {
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panic(err)
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}
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iterators = append(iterators, Literator(tokens...), sub)
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}
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return Concaterator(iterators...)
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}
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