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60 lines
1.4 KiB
60 lines
1.4 KiB
package t
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import (
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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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// Tex lexer.
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var TeX = internal.Register(MustNewLazyLexer(
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&Config{
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Name: "TeX",
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Aliases: []string{"tex", "latex"},
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Filenames: []string{"*.tex", "*.aux", "*.toc"},
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MimeTypes: []string{"text/x-tex", "text/x-latex"},
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},
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texRules,
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))
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func texRules() Rules {
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return Rules{
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"general": {
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{`%.*?\n`, Comment, nil},
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{`[{}]`, NameBuiltin, nil},
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{`[&_^]`, NameBuiltin, nil},
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},
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"root": {
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{`\\\[`, LiteralStringBacktick, Push("displaymath")},
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{`\\\(`, LiteralString, Push("inlinemath")},
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{`\$\$`, LiteralStringBacktick, Push("displaymath")},
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{`\$`, LiteralString, Push("inlinemath")},
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{`\\([a-zA-Z]+|.)`, Keyword, Push("command")},
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{`\\$`, Keyword, nil},
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Include("general"),
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{`[^\\$%&_^{}]+`, Text, nil},
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},
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"math": {
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{`\\([a-zA-Z]+|.)`, NameVariable, nil},
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Include("general"),
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{`[0-9]+`, LiteralNumber, nil},
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{`[-=!+*/()\[\]]`, Operator, nil},
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{`[^=!+*/()\[\]\\$%&_^{}0-9-]+`, NameBuiltin, nil},
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},
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"inlinemath": {
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{`\\\)`, LiteralString, Pop(1)},
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{`\$`, LiteralString, Pop(1)},
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Include("math"),
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},
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"displaymath": {
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{`\\\]`, LiteralString, Pop(1)},
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{`\$\$`, LiteralString, Pop(1)},
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{`\$`, NameBuiltin, nil},
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Include("math"),
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},
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"command": {
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{`\[.*?\]`, NameAttribute, nil},
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{`\*`, Keyword, nil},
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Default(Pop(1)),
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},
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}
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}
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