1package r
2
3import (
4 "strings"
5
6 . "github.com/alecthomas/chroma" // nolint
7 "github.com/alecthomas/chroma/lexers/internal"
8)
9
10// Restructuredtext lexer.
11var Restructuredtext = internal.Register(MustNewLexer(
12 &Config{
13 Name: "reStructuredText",
14 Aliases: []string{"rst", "rest", "restructuredtext"},
15 Filenames: []string{"*.rst", "*.rest"},
16 MimeTypes: []string{"text/x-rst", "text/prs.fallenstein.rst"},
17 },
18 Rules{
19 "root": {
20 {"^(=+|-+|`+|:+|\\.+|\\'+|\"+|~+|\\^+|_+|\\*+|\\++|#+)([ \\t]*\\n)(.+)(\\n)(\\1)(\\n)", ByGroups(GenericHeading, Text, GenericHeading, Text, GenericHeading, Text), nil},
21 {"^(\\S.*)(\\n)(={3,}|-{3,}|`{3,}|:{3,}|\\.{3,}|\\'{3,}|\"{3,}|~{3,}|\\^{3,}|_{3,}|\\*{3,}|\\+{3,}|#{3,})(\\n)", ByGroups(GenericHeading, Text, GenericHeading, Text), nil},
22 {`^(\s*)([-*+])( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
23 {`^(\s*)([0-9#ivxlcmIVXLCM]+\.)( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
24 {`^(\s*)(\(?[0-9#ivxlcmIVXLCM]+\))( .+\n(?:\1 .+\n)*)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
25 {`^(\s*)([A-Z]+\.)( .+\n(?:\1 .+\n)+)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
26 {`^(\s*)(\(?[A-Za-z]+\))( .+\n(?:\1 .+\n)+)`, ByGroups(Text, LiteralNumber, UsingSelf("inline")), nil},
27 {`^(\s*)(\|)( .+\n(?:\| .+\n)*)`, ByGroups(Text, Operator, UsingSelf("inline")), nil},
28 {`^( *\.\.)(\s*)((?:source)?code(?:-block)?)(::)([ \t]*)([^\n]+)(\n[ \t]*\n)([ \t]+)(.*)(\n)((?:(?:\8.*|)\n)+)`, EmitterFunc(rstCodeBlock), nil},
29 {`^( *\.\.)(\s*)([\w:-]+?)(::)(?:([ \t]*)(.*))`, ByGroups(Punctuation, Text, OperatorWord, Punctuation, Text, UsingSelf("inline")), nil},
30 {`^( *\.\.)(\s*)(_(?:[^:\\]|\\.)+:)(.*?)$`, ByGroups(Punctuation, Text, NameTag, UsingSelf("inline")), nil},
31 {`^( *\.\.)(\s*)(\[.+\])(.*?)$`, ByGroups(Punctuation, Text, NameTag, UsingSelf("inline")), nil},
32 {`^( *\.\.)(\s*)(\|.+\|)(\s*)([\w:-]+?)(::)(?:([ \t]*)(.*))`, ByGroups(Punctuation, Text, NameTag, Text, OperatorWord, Punctuation, Text, UsingSelf("inline")), nil},
33 {`^ *\.\..*(\n( +.*\n|\n)+)?`, CommentPreproc, nil},
34 {`^( *)(:[a-zA-Z-]+:)(\s*)$`, ByGroups(Text, NameClass, Text), nil},
35 {`^( *)(:.*?:)([ \t]+)(.*?)$`, ByGroups(Text, NameClass, Text, NameFunction), nil},
36 {`^(\S.*(?<!::)\n)((?:(?: +.*)\n)+)`, ByGroups(UsingSelf("inline"), UsingSelf("inline")), nil},
37 {`(::)(\n[ \t]*\n)([ \t]+)(.*)(\n)((?:(?:\3.*|)\n)+)`, ByGroups(LiteralStringEscape, Text, LiteralString, LiteralString, Text, LiteralString), nil},
38 Include("inline"),
39 },
40 "inline": {
41 {`\\.`, Text, nil},
42 {"``", LiteralString, Push("literal")},
43 {"(`.+?)(<.+?>)(`__?)", ByGroups(LiteralString, LiteralStringInterpol, LiteralString), nil},
44 {"`.+?`__?", LiteralString, nil},
45 {"(`.+?`)(:[a-zA-Z0-9:-]+?:)?", ByGroups(NameVariable, NameAttribute), nil},
46 {"(:[a-zA-Z0-9:-]+?:)(`.+?`)", ByGroups(NameAttribute, NameVariable), nil},
47 {`\*\*.+?\*\*`, GenericStrong, nil},
48 {`\*.+?\*`, GenericEmph, nil},
49 {`\[.*?\]_`, LiteralString, nil},
50 {`<.+?>`, NameTag, nil},
51 {"[^\\\\\\n\\[*`:]+", Text, nil},
52 {`.`, Text, nil},
53 },
54 "literal": {
55 {"[^`]+", LiteralString, nil},
56 {"``((?=$)|(?=[-/:.,; \\n\\x00\\\u2010\\\u2011\\\u2012\\\u2013\\\u2014\\\u00a0\\'\\\"\\)\\]\\}\\>\\\u2019\\\u201d\\\u00bb\\!\\?]))", LiteralString, Pop(1)},
57 {"`", LiteralString, nil},
58 },
59 },
60))
61
62func rstCodeBlock(groups []string, lexer Lexer) Iterator {
63 iterators := []Iterator{}
64 tokens := []Token{
65 {Punctuation, groups[1]},
66 {Text, groups[2]},
67 {OperatorWord, groups[3]},
68 {Punctuation, groups[4]},
69 {Text, groups[5]},
70 {Keyword, groups[6]},
71 {Text, groups[7]},
72 }
73 code := strings.Join(groups[8:], "")
74 lexer = internal.Get(groups[6])
75 if lexer == nil {
76 tokens = append(tokens, Token{String, code})
77 iterators = append(iterators, Literator(tokens...))
78 } else {
79 sub, err := lexer.Tokenise(nil, code)
80 if err != nil {
81 panic(err)
82 }
83 iterators = append(iterators, Literator(tokens...), sub)
84 }
85 return Concaterator(iterators...)
86}